WO2000073065A1 - Dispositif et procede de lithographie, dispositif et procede de fabrication de plaques, et dispositif et procede d'impression par jet d'encre - Google Patents
Dispositif et procede de lithographie, dispositif et procede de fabrication de plaques, et dispositif et procede d'impression par jet d'encre Download PDFInfo
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- WO2000073065A1 WO2000073065A1 PCT/JP2000/003493 JP0003493W WO0073065A1 WO 2000073065 A1 WO2000073065 A1 WO 2000073065A1 JP 0003493 W JP0003493 W JP 0003493W WO 0073065 A1 WO0073065 A1 WO 0073065A1
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- WO
- WIPO (PCT)
- Prior art keywords
- ink
- printing
- plate
- image
- oil
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/06—Lithographic printing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C1/00—Forme preparation
- B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
- B41C1/1066—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by spraying with powders, by using a nozzle, e.g. an ink jet system, by fusing a previously coated powder, e.g. with a laser
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/015—Ink jet characterised by the jet generation process
- B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
- B41J2/06—Ink jet characterised by the jet generation process generating single droplets or particles on demand by electric or magnetic field
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
- B41J3/60—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for printing on both faces of the printing material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2002/012—Ink jet with intermediate transfer member
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/015—Ink jet characterised by the jet generation process
- B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
- B41J2/06—Ink jet characterised by the jet generation process generating single droplets or particles on demand by electric or magnetic field
- B41J2002/061—Ejection by electric field of ink or of toner particles contained in ink
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
- B41M7/009—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using thermal means, e.g. infrared radiation, heat
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
- B41P2227/00—Mounting or handling printing plates; Forming printing surfaces in situ
- B41P2227/70—Forming the printing surface directly on the form cylinder
Definitions
- the present invention relates to an ink jet recording method with good image quality using a multi-channel head drawing apparatus. Further, the present invention relates to a lithographic printing method and a lithographic printing apparatus for performing digital plate making on a printing press, a plate making method and a plate making apparatus for performing digital plate making, and an ink jet printing method and a printing apparatus using the ink jet recording method.
- Background art
- Japanese Patent Application Laid-Open No. 10-2866939 discloses that a rotary printing press is provided with an ink jet printing device, and the printing is performed on the same printing paper.
- a method of additionally printing a variable number or mark with an ink jet system is disclosed.
- ink jet technologies there is a method in which an ink in a solid state is melted by heating at room temperature, and a liquid ink is ejected to form an image.
- the use of this ink reduces the bleeding of the printed image, but it is difficult to eject fine droplets due to the high ink viscosity at the time of ejection, and the resulting dot image has a small area. Large and thick, making it difficult to form high-definition images.
- each electrode of the head when drawing at an image resolution of, for example, 600 dpi, each electrode of the head is subject to manufacturing process restrictions. Therefore, it is about 126 m, which is equivalent to about 200 dpi. Therefore, taking as an example a four-channel head as shown in Fig. 11, each of the discharge electrodes 56-1 to 56- 2 has been moved in two steps of about 42 m, which is equivalent to 6 dpi. After that, it will move to step 10 one step and continue drawing.
- ink droplets ejected adjacent to each other may deviate from the course where they should be arriving during flight due to charge repulsion, and the landing position accuracy may decrease.
- an ink receptive area and an ink repellent area are provided on the surface of a printing plate corresponding to an image document, and printing is performed by attaching the print ink to the ink receptive area.
- hydrophilic and lipophilic (ink-receptive) areas are formed imagewise on the surface of the printing plate, and the hydrophilic areas are made ink-repellent by using a fountain solution.
- an image manuscript is first output in analog or digital form onto a silver halide photographic film, and then through a diazo resin or photopolymerizable photopolymer photosensitive material (printing master). It is a common method to expose the non-image area and elute and remove the non-image area mainly using an alkaline solution.
- plate making in both the light mode and the thermal mode, plate making is generally performed by dissolving and removing non-image areas by processing with an alkaline developer after recording with a laser. Is emitted, which is not preferable for environmental protection.
- a plate drum having a hydrophilic or lipophilic surface is provided in place of the conventional plate cylinder, and a lipophilic or hydrophilic image is formed on the drum.
- a method of forming an image by an etching method removing an image after printing, and cleaning the image.
- in order to form a print image with high printing durability on a plate cylinder it is necessary to use an ink containing a relatively high concentration of resin. Therefore, in an ink jet unit for forming a print image, a nozzle portion is used. Adhesion of the resin is likely to occur due to solvent evaporation, and ink ejection stability is low. As a result, it is difficult to obtain a good image.
- Japanese Patent Application Laid-Open No. 6-27953 discloses a method of performing plate making by drawing by an ink jet method using a lipophilic box ink on a hydrophilic plate material.
- the image is formed with wax, so that the mechanical strength of the image area is weak, and the printing durability is low because the adhesion to the hydrophilic surface of the printing plate is insufficient.
- the present invention has been made in view of the above problems, and an object of the present invention is to provide an ink jet recording method using a multi-channel head drawing apparatus capable of stably obtaining extremely high-quality images.
- Another object of the present invention is to provide a lithographic printing method and a lithographic printing apparatus that are digitally compatible and do not require development processing.
- It is still another object of the present invention to provide a lithographic printing method and a lithographic printing apparatus capable of printing a large number of clear and high-quality images using an inexpensive apparatus and a simple method.
- Another object of the present invention is to provide a digital plate making method and a plate making apparatus which does not require a developing process.
- It is still another object of the present invention to provide an inkjet printing method that provides a clear and high-quality image print using an inexpensive apparatus and a simple method. Disclosure of the invention
- An ink jet in which a plate material is mounted on a plate cylinder of a printing press, and an oil-based ink is discharged from the recording head having a plurality of discharge channels by using an electrostatic field on the plate material based on a signal of image data. Direct drawing on the surface of the plate material by drawing Forming a printing plate, and using the printing plate in that state to perform lithographic printing continuously.
- An image is formed on a printing plate using a recording head with a discharge channel spacing of 170 m or more [150 dpi per inch (150 tons per inch) or less). Lithographic printing method for on-machine drawing.
- the oil-based ink is obtained by dispersing solid and hydrophobic resin particles at least at room temperature in a non-aqueous solvent having a specific electric resistance of 10 9 ⁇ cm or more and a dielectric of 3.5 or less.
- An ink jet that discharges oil-based ink from a recording head having a plurality of discharge channels by using an electrostatic field on a plate material mounted on a plate cylinder of a printing apparatus based on a signal of an image signal.
- An on-press drawing lithographic printing apparatus comprising: an image forming means for directly forming an image by a drawing apparatus; and a lithographic printing means for performing lithographic printing on a printing plate formed by the image forming means.
- the image forming means is provided with a recording head having a discharge channel interval of 170 m or more [150 dpi (150 dots per inch interval) or less in terms of a resolution of a drawn image]. Lithographic printing equipment.
- the oil-based ink is obtained by dispersing solid and hydrophobic resin particles at least at room temperature in a non-aqueous solvent having a specific electric resistance of 10 9 ⁇ or more and a dielectric of 3.5 or less. 2.
- the image forming means includes a fixing device for the ink.
- the image forming means includes a plate material surface dust removing means for removing dust present on the plate material surface before and / or during drawing on the plate material.
- the on-press lithographic printing apparatus according to any of (5).
- the image forming means performs main scanning by rotating a plate cylinder on which the plate material is mounted, when drawing on the plate material. On-machine drawing lithographic printing equipment.
- the ink jet drawing apparatus performs sub-scanning by moving the recording head in the axial direction of the plate cylinder when drawing on the plate material.
- the ink jet drawing apparatus causes the recording head to approach the plate cylinder when drawing on the plate material, and moves the recording head from the plate cylinder except when drawing on the plate material.
- the on-press lithographic printing apparatus according to any one of (3) to (13), further comprising a recording head separating / contacting means.
- the image forming means includes a recording head cleaning means for cleaning the recording head at least after the completion of plate making (3) to (3).
- lithographic printing means according to any one of (3) to (15), wherein the lithographic printing means includes paper dust removing means for removing paper dust generated during lithographic printing. Plate printing equipment.
- the image is drawn directly on the plate material by drawing by an ink jet method in which an oil-based ink is ejected from a recording head having multiple ejection channels using an electrostatic field based on the signal of the image data.
- the discharge channel spacing is 170 im or more [150 dpi in terms of the resolution of the drawn image (interval of 150 dots per inch)
- the record head that is Plate making method characterized by the following.
- the oil-based ink is obtained by dispersing solid and hydrophobic resin particles at least at room temperature in a non-aqueous solvent having a specific electric resistance of 10 9 ⁇ cm or more and a dielectric of 3.5 or less. Plate making method described in 7).
- An image forming means for forming an image directly on a plate material by an ink jet drawing apparatus for discharging an oil-based ink from a recording head having a plurality of discharge channels by using an electrostatic field based on a signal of image data.
- An image is formed on a plate using a recording head with a discharge channel spacing of 170 m or more [150 dpi (150 dots per inch) or less when converted to the resolution of a drawn image].
- a plate making device that is characterized.
- the oil-based ink is obtained by dispersing solid and hydrophobic resin particles at least at room temperature in a non-aqueous solvent having a specific electric resistance of 10 9 ⁇ or more and a dielectric of 3.5 or less.
- a plate-making apparatus according to item 1.
- the image forming means includes plate material surface dust removing means for removing dust present on the plate material surface before and / or during drawing on the plate material. (19) ⁇
- drawing is performed by rotating the drum on which the plate material is mounted and moving the print medium described above (19) to (22). Plate making equipment.
- sub-scanning is performed by nipping and moving the plate material by at least one pair of the hubstan rollers (19) to (22).
- a plate-making apparatus according to any one of the above.
- the ink jet drawing apparatus fills the recording head with the oil-based ink.
- the plate making apparatus according to any one of (19) to (26), further comprising an ink supply means for supplying.
- An image is printed directly on a print medium by performing drawing using an ink jet method in which an oil-based ink is discharged from a recording head having a plurality of discharge channels by using an electrostatic field based on a signal of image data.
- an ink jet method in which an oil-based ink is discharged from a recording head having a plurality of discharge channels by using an electrostatic field based on a signal of image data.
- An image is formed on a print medium using a recording head with a discharge channel interval of 170 m or more [150 dpi (150 dots per inch interval) or less in terms of the resolution of a drawn image].
- the printing method you want.
- An image is formed directly on a print medium by an ink jet drawing apparatus that discharges oil-based ink from a recording head having a plurality of discharge channels by using an electrostatic field based on a signal of an image data overnight.
- an ink jet drawing apparatus that discharges oil-based ink from a recording head having a plurality of discharge channels by using an electrostatic field based on a signal of an image data overnight.
- the formation of an image on the printing medium is performed using a recording head with a discharge channel interval of 170 / m or more [150 dpi (150 dots per inch interval) or less in terms of the resolution of a drawn image].
- a printing apparatus characterized in that the printing is performed in a printing mode.
- oil-based ink is a dispersion of at least colored particles in a non-aqueous solvent having a specific electric resistance of 10 9 ⁇ or more and a dielectric of 3.5 or less.
- drawing is performed by rotating the opposed drum disposed at a position facing the recording head via the print medium to move the print medium ( 35.
- the printing device according to any one of items 3 to 38.
- drawing is performed by nipping and running the printing medium by at least a pair of hubstan rollers (35) to (38).
- the printing device according to the above.
- the printing apparatus according to (43), further comprising an ink collecting means for collecting the oil-based ink from the recording head, and performing ink circulation.
- the ink jet drawing apparatus has an ink temperature management means for managing the temperature of the oily ink in the inkk for storing the oily ink.
- a printing device according to any one of claims 1 to 3.
- the printing apparatus according to any one of (35) to (46), wherein the ink jet drawing apparatus has an ink density control unit that controls the density of the oil-based ink.
- FIG. 1 is an overall configuration diagram schematically showing an example of an on-press lithographic printing apparatus used in the present invention.
- FIG. 2 is a configuration diagram schematically illustrating an example of a drawing unit of the on-press lithographic printing apparatus used in the present invention.
- FIG. 3 is a schematic configuration diagram showing an example of a head provided in the ink jet recording apparatus used in the present invention.
- FIG. 4 is a schematic cross-sectional view of the vicinity of the ink discharge portion in FIG.
- FIG. 5 is a schematic cross-sectional view of an example of another head provided in the ink jet recording apparatus used in the present invention in the vicinity of an ink discharge section.
- FIG. 6 is a schematic front view of the vicinity of the ink discharge section in FIG.
- FIG. 7 is a schematic configuration diagram showing a main part of an example of another head provided in the ink jet recording apparatus used in the present invention.
- FIG. 8 is a schematic configuration diagram of the head of FIG. 7 with the restriction plate removed.
- FIG. 9 is a schematic configuration diagram showing a main part of an example of another head provided in the inkjet recording apparatus used in the present invention.
- FIG. 10 is an overall configuration diagram schematically showing an on-press drawing four-color single-sided lithographic printing press as an example of a multicolor printing machine used in the present invention.
- FIG. 11A is an overall configuration diagram schematically showing one example of a plate making apparatus used in the present invention.
- FIG. 11B is an overall configuration diagram schematically showing another example of the plate making apparatus used in the present invention.
- FIG. 11C is a diagram for explaining a method of drawing a 4-channel head.
- FIG. 12 is a diagram for explaining the influence of the ejection electrode in the 6-channel head drawing method.
- FIG. 13 is a diagram for explaining the influence of the ejection electrode in the 4-channel head drawing method.
- FIG. 14 is an overall configuration diagram schematically showing a Web-type apparatus for performing single-sided single-color printing, which is an example of the ink jet printing apparatus of the present invention.
- FIG. 15 is an overall configuration diagram schematically showing a Web-type device for printing four colors on one side, which is another example of the ink jet printing device of the present invention.
- FIG. 16 is an overall configuration diagram schematically showing a two-sided four-color printing apparatus as another example of the ink jet printing apparatus of the present invention.
- FIG. 17 is an overall configuration diagram schematically showing a two-sided four-color printing device which is another example of the ink jet printing device of the present invention.
- FIG. 18 is a schematic view of a single-sided four-color printing apparatus that cuts a roll-shaped printing medium and winds it around an opposing drum, which is another example of the ink jet printing apparatus of the present invention. It is a block diagram.
- FIG. 19 is an overall configuration diagram schematically showing a printing apparatus using a sheet recording medium, which is another example of the ink jet printing apparatus of the present invention.
- FIG. 20 is an overall configuration diagram schematically showing a printing apparatus that performs drawing by sandwiching and running a roll-shaped printing medium by a Cabs-type printer, which is another example of the ink jet printing apparatus of the present invention. is there.
- FIG. 21 is an overall configuration schematically showing a printing apparatus, which is another example of the ink jet printing apparatus of the present invention and performs drawing by nipping and running a sheet-like recording medium with a cap stun opening porter.
- the outermost electrodes on both sides are always bent outward when the adjacent electrode is ON (56-1).
- the above two phenomena may occur independently or overlap. This is considered to be due to the structure of the head, the physical properties of the ink, the flow path, the voltage pulse conditions applied during ejection, and the like. Therefore, when the distance between the respective ejection electrodes was examined, according to the present invention, the interval between the respective ejection electrodes in the head portion was determined to be at least the right and left adjacent dot intervals to be ejected determined by the resolution of the target drawing image. It has been found that the crosstalk problem is better avoided by making it wider.
- the interval between the ejection channels is set to 170 zm or more (150 dpi or less in terms of drawing resolution), and further to 250 ⁇ ⁇ m or more (100 dpi or less). Is preferred.
- the steps of the interval between adjacent dots determined from the resolution of the drawn image are performed a predetermined number of times. After repeating, the target image can be obtained by repeating the steps of substantially the entire channel width so that no gap is formed.
- the distance between the electrodes of all channels is moved (corresponding to the mouth in Fig. 11C).
- the desired image can be obtained.
- the number of channels can be set as appropriate, but if the electrode spacing is wide (the number is small in dpi), the same channel number will increase the overall width and facilitate processing.
- the ink jet recording method of the present invention uses an ink having a high resistance in which hydrophobic resin particles which are solid at room temperature at least are dispersed in an insulating solvent, and an electrostatic field is applied to the ink at a discharge position. Thereby, an aggregate of the resin particles is formed at the discharge position, and the aggregate is discharged from the discharge position by electrostatic means. Specifically, for example, the electrostatic ink jet method described in WO 93/118686 can be applied.
- the resin particles are ejected as agglomerates having a high concentration, so that a sufficient dot film thickness printed on the plate material can be obtained.
- an image of the aggregated resin particles having sufficient printing durability is formed on the plate material as the recording medium.
- the resin particles are ejected as agglomerates with a high concentration, the solvent component contained in the ejected droplets is small, and the ink dries faster, so that dot bleeding on the plate is suppressed, and high-definition images are obtained. Is formed.
- the size of the ejected ink droplet is determined by the size of the tip of the ejection electrode or the conditions for forming the electric field, so that a small ink droplet can be ejected without reducing the diameter of the ejection nozzle or the slit width. can get.
- the dot diameter on the recording medium can be controlled by controlling the electric field forming conditions. Therefore, it is possible to control a minute image without the problem of head clogging, and to provide a large number of prints of clear images.
- the ink jetting method of the present invention is performed using an electrostatic field, and it is preferable that a strong electric field is applied to the ink to discharge the ink. Since there are cases where the electric field strength is not obtained good ejection property when not sufficient, it is appropriate than about 1 X 1 0 5 V / cm . On the other hand, if it is too high, dot splitting or satellites may occur, and the image quality tends to deteriorate. Therefore, it is preferably about 1 ⁇ 10 8 V / cm or less. More preferably in the range of 5 X 1 0 7 V / cm from 2 X 1 0 5 V / cm .
- FIG. 1 is an overall configuration diagram of an on-press drawing single-color lithographic printing apparatus.
- Figure 2 is drawn on this machine 2 is a schematic configuration example of a drawing unit including a control unit, an ink supply unit, and a head detachment / attachment mechanism of the lithographic printing apparatus.
- FIGS. 3 to 9 are for explaining an ink jet recording apparatus provided in the on-press lithographic printing apparatus of FIGS. 1 and 10.
- FIG. 10 shows an example of the overall configuration of an on-press drawing four-color single-sided lithographic printing apparatus according to the present invention.
- an on-press lithographic printing apparatus 1 (hereinafter also simply referred to as a “printing apparatus”) has a plate cylinder 11, a blanket cylinder 12 and an impression cylinder 13 one by one.
- a blanket cylinder 12 for transfer is arranged so as to press against the plate cylinder 11, and the printing ink image transferred to the blanket cylinder 12 is printed on the blanket cylinder 12.
- An impression cylinder 13 for transferring to P is disposed so as to be in pressure contact with the impression cylinder.
- the plate cylinder 11 is usually made of metal, and its surface is provided with, for example, chrome plating to enhance abrasion resistance, but may have a heat insulating material on its surface as described later.
- the plate cylinder 11 is preferably grounded because it serves as a counter electrode of the discharge head electrode in electrostatic field discharge.
- the insulating property of the base of the plate material is high, it is preferable to provide a conductive layer on the base. In this case, it is preferable to provide a means for grounding the plate cylinder from the conductive layer. Further, even when the heat insulating material is provided on the plate cylinder as described above, the drawing is facilitated by providing the means for grounding the plate material. In this case, a known means such as a brush, a panel, or a roller having conductivity can be used.
- the printing device 1 has an ink jet recording device (ink jet drawing device) 2, and accordingly, on the plate cylinder 11 corresponding to the image data sent from the image data arithmetic control unit 21. An oil-based ink is discharged onto the plate material 9 mounted on the printer to form an image.
- ink jet drawing device ink jet drawing device
- Fig. 1 shows a Molton water supply system as a representative example of the dampening water supply device 3.Other known devices, such as a water supply system with a simulated outlet and a continuous water supply system, are used as the dampening water supply device 3. it can.
- the printing device 1 includes a printing ink supply device 4 and a fixing device 5 for strengthening an oil-based ink image drawn on the plate material 9. 9 plate surface if necessary A plate surface desensitizing device 6 may be installed for the purpose of enhancing the hydrophilicity of the plate.
- the printing apparatus 1 has a plate material surface dust removing means 10 for removing dust existing on the plate material surface before and / or during drawing on the plate material.
- a plate material surface dust removing means 10 for removing dust existing on the plate material surface before and / or during drawing on the plate material.
- an automatic plate feeding device 7 for automatically supplying the plate material 9 onto the plate cylinder 11 and an automatic plate discharging device 8 for automatically removing the plate after printing from the plate cylinder 11 are installed.
- a printing press having this device which is known as an auxiliary device of a printing press for example, Hamada VS 34A, B4502A (Hamada Printing Machinery Co., Ltd.), Toko-1 800 PFA (Tokyo Aviation Instruments Inc.) Corporation), 3200 ACD, 3200 PFA (Ryoobi Magic Disk, Inc.), AMS IS Multiti 500 FA (Nippon Aem Co., Ltd.), Oliver 26 6 EPZ (Sakurai Graphic Systems Co., Ltd.) and Shinohara 6 6 IV / IVP (Shinohara Shoji Co., Ltd.).
- a blanket cleaning device 14 and an impression cylinder cleaning device 14 ' may be installed.
- a paper dust generation preventing device (paper dust removing means) 15 may be installed near the impression cylinder 13, thereby preventing the paper dust from adhering to the plate material.
- a method such as humidity control, air suction, or the like can be used.
- the image data arithmetic control unit 21 receives image data from an image scanner, a magnetic disk device, an image data transmission device, etc., performs color separation, and has an appropriate number of pixels and gradation for the separated data. Divide into numbers. Further, in order to draw an oil-based ink image in a halftone dot using an ink ejection head 22 (see FIG. 2, which will be described in detail later) as a recording head of the inkjet recording apparatus 2, The dot area ratio is also calculated. As will be described later, the image data calculation control unit 21 controls the movement of the ink jetting head 22 and the timing of discharging the oil-based ink, and also performs the printing cylinder 11 and the blanket printing as needed. It also controls the operation timing of the torso cylinders 12, the impression cylinders 13, and the like. With reference to FIG. 1 and partly in FIG. 2, the process of preparing a printing plate by the printing apparatus 1 will be described below.
- the plate material 9 is mounted on the plate cylinder 11 using the automatic plate feeding device 7.
- the plate material is tightly fixed on the plate cylinder by a known method such as a plate head / butt holding device, an air suction device, or an electrostatic method.
- the ink jet recording device 2 can be prevented from being damaged by contact with the ink jet recording device 2.
- a means is provided for bringing the plate material into close contact with the plate cylinder only around the drawing position of the ink jet recording device, and this is applied at least when drawing is performed, so that the plate material contacts the ink jet recording device. Can be prevented.
- the image data from the magnetic disk device or the like is given to an image data calculation control unit 21.
- the image data calculation control unit 21 determines the ejection position of the oil-based ink according to the input image data and the network at that position. The point area ratio is calculated. These operation data are temporarily stored in a buffer.
- the image data calculation control unit 21 rotates the plate cylinder 11 and brings the ejection head 22 into close proximity to the plate cylinder 11 by a head separation / contact device (recording head separation / contact means) 31. Closer to the position.
- the distance between the discharge head 2 2 and the surface of the plate 9 on the plate cylinder 1 1 can be controlled by mechanical distance control, such as a contact roller, or by a signal from an optical distance detector.
- the main scanning is performed by rotating the plate cylinder 11 for drawing.
- the discharge unit is arranged in the axial direction.
- the head 22 is moved in the axial direction of the plate cylinder 1 by one rotation of the plate cylinder 1 by the image data calculation control unit 21, and the oil position is determined by the discharge position and the dot area ratio obtained by the above calculation.
- N Is discharged onto the plate material 9 mounted on the plate cylinder 1 1.
- the discharge head 22 is retracted away from a position close to the plate cylinder 11.
- the discharge head 22 may be separated from and connected to only the discharge head 22.
- the discharge head 22 and the head sub-scanning means 32 may be separated and connected together, or the discharge head 22 and the ink supply unit. 24 and the head sub-scanning means 32 can all be separated and connected together.
- the fixing device 5 and the dust removing means 10 are also provided with separating means, respectively, so that they can be retracted. This makes it possible to handle normal printing.
- This separation / contact means operates to separate the recording head from the plate cylinder by at least 500 / m except at the time of drawing.
- the detachment operation may be a slide type, or the head may be fixed with an arm fixed to a certain axis, and the arm may be moved around the axis to move like a pendulum. By retracting the head during non-drawing in this way, the head can be protected from physical damage or contamination, and a longer life can be achieved.
- the formed oil-based ink image is reinforced by heating or the like in the fixing device 5.
- known means such as heat fixing and solvent fixing can be used.
- Heat fixing is generally performed using infrared lamps, halogen lamps, xenon flash lamps, hot air fixing using heaters, or heat fixing.
- the plate cylinder is heated, the plate material is pre-heated, drawing is performed while applying hot air, the plate cylinder is coated with heat insulating material, and the plate is fixed only during fixing. It is effective to take measures such as separating the plate material from the cylinder and heating only the plate material alone or in combination.
- Flash fixing using a xenon lamp or the like is known as an electrophotographic toner fixing method, and has an advantage that fixing can be performed in a short time.
- solvent fixing a solvent that can dissolve the resin components in the ink, such as methanol and ethyl acetate, is sprayed, and excess solvent vapor is collected.
- the dampening water supply device 3, the printing ink supply device 4, and the blanket cylinder 12 are used for the plate. It is desirable that the plate 9 on the cylinder be kept out of contact.
- the printing process after the plate is formed is the same as a known lithographic printing method.
- a printing ink and dampening solution are applied to the plate material 9 on which the oil-based ink image is drawn to form a printing image, and the printing ink image is formed on the blanket cylinder 12 rotating together with the printing cylinder 11. Then, the printing ink image on the blanket cylinder 12 is transferred onto the printing paper P passing between the blanket cylinder 12 and the impression cylinder 13 to print one color.
- the plate material 9 is removed from the plate cylinder 11 by the automatic plate discharging device 8, and the blanket on the blanket cylinder 12 is washed by the blanket washing device 14 so that the next printable state is obtained. Become.
- the drawing section used in the lithographic printing apparatus includes an ink jet recording apparatus 2 and an ink supply section 24.
- the ink supply section 24 further includes an ink tank 25, an ink supply device 26, and an ink concentration control means 29, and an ink stirring means 27, an ink temperature in the ink tank 25.
- Management means (ink temperature control means) 28 are included.
- the ink may be circulated in the head, in which case the ink supply unit also has a collection and circulation function.
- the ink agitation means 27 suppresses the precipitation-aggregation of the solid components of the ink, and the necessity of cleaning the ink tank is reduced.
- the ink stirring means a rotary blade, an ultrasonic vibrator, and a circulating pump can be used, and these are used or in combination.
- the ink temperature management means 28 is arranged so that high-quality images can be formed stably without changing the physical properties of the ink due to changes in the surrounding temperature and without changing the dot diameter.
- a heating element or a cooling element such as a Peltier element or the like is arranged in an ink tank together with a stirring means so as to keep the temperature distribution in the tank constant, and a temperature sensor, For example, a known method such as control using a thermostat or the like can be used.
- the ink temperature in the ink tank is preferably from 15 ° C to 60 ° C, more preferably from 20 ° C to 50 ° C.
- the stirring means for keeping the temperature distribution in the tank constant may be shared with the ink stirring means for the purpose of suppressing the precipitation and agglomeration of the solid matter of the ink.
- the printing apparatus has an ink density control unit 29 for performing high-quality drawing. This causes bleeding on the plate due to a decrease in the solids concentration in the ink, jumps and blurring of the printed image, or changes in the dot diameter on the plate due to the increase in the solids concentration. Can be effectively suppressed.
- the ink concentration is measured by optical detection, physical property measurement such as conductivity measurement, clay measurement, or management based on the number of drawn images.
- an optical detector, a conductivity measuring device, and a clay measuring device are provided alone or in combination in the ink tank or ink flow path, and the output signal is output.
- the management is performed based on the number of drawn sheets, the supply of the liquid from a replenishing concentrated ink tank or a diluted ink carrier tank (not shown) to the ink tank is controlled based on the number of plate making and the frequency.
- the image data calculation control unit 21 calculates the input image data and, in addition to moving the head by the head separation / contact device 31 or the head sub-scanning means 32, The timing pulse from the encoder 130 installed on the plate cylinder is taken in, and the head is driven according to the timing pulse. Thereby, the positional accuracy in the sub-scanning direction can be improved.
- the plate cylinder is driven by using a high-precision driving means different from the driving means at the time of printing, so that the positional accuracy in the sub-scanning direction can be enhanced.
- FIGS. 3 and 4 show examples of the head provided in the ink jet recording apparatus.
- the head 22 has a slit sandwiched between an upper unit 22 1 and a lower unit 22 2 made of an insulating base material, and the tip thereof forms a discharge slit 22 a.
- the discharge electrode 22b is arranged in the slit, and the slit 23 supplied from the ink supply device is filled in the slit.
- the insulating base material for example, plastic, glass, ceramic, or the like can be applied.
- the discharge electrode 22b is formed by vacuum-depositing, sputtering, or electroless plating a conductive material such as aluminum, nickel, chromium, gold, or platinum on the lower unit 222 made of an insulating base material.
- a photo resist is applied thereon, and the photo resist is applied through a mask having a predetermined electrode pattern.
- the resist is exposed and developed to form a photoresist pattern for the discharge electrode 22b, which is then etched, mechanically removed, or a combination thereof. Formed by the method.
- a voltage is applied to the ejection electrode 22b in accordance with the digital signal of the image pattern information.
- a plate cylinder 11 serving as a counter electrode is provided so as to face the discharge electrode 2 2 b, and a plate material 9 is provided on the plate cylinder 11 serving as the counter electrode. I have.
- a circuit is formed between the discharge electrode 22 b and the plate cylinder 11 serving as a counter electrode, and the oil-based ink 23 is discharged from the discharge slit 22 a of the head 22.
- An image is formed on a plate material 9 provided on a plate cylinder 11 serving as a counter electrode.
- the width of the discharge electrode 22 b is as narrow as possible in order to form a high quality image. Specific values vary depending on conditions such as applied voltage and ink substance, but are usually used in the range of 5 to 100 m in tip width.
- FIGS. 5 and 6 show a schematic cross-sectional view and a schematic front view of the vicinity of the ink discharge portion of another example of the discharge head, respectively.
- reference numeral 22 denotes a discharge head, and the discharge head 22 has a first insulating base material 33 having a gradually decreasing shape.
- a second insulating base material 34 is provided on the first insulating base material 33 so as to face away therefrom, and a slope portion 35 is formed at the tip of the second insulating base material 34.
- the first and second insulating substrates are made of, for example, plastic, glass, ceramics, or the like.
- a plurality of discharge electrodes 2 2b are provided on the upper surface portion 36 forming an acute angle with the slope portion 35 of the second insulating base material 34 as an electrostatic field forming means for forming an electrostatic field at the discharge portion. I have.
- the tips of the plurality of ejection electrodes 22 b extend to near the tip of the upper surface portion 36, and the tips protrude forward from the first insulating base material 33, and Is formed.
- An ink inflow path 37 is formed between the first and second insulating bases 33 and 34 as a means for supplying the ink 23 to the discharge section, and the second insulating base 3
- An ink recovery path 38 is formed at the lower side of 4.
- the discharge electrode 2 2b is A conductive material such as aluminum, nickel, chromium, gold, and platinum is formed on the second insulating substrate 34 by a known method as described above.
- the individual electrodes 22b are configured to be electrically insulated from each other.
- the amount by which the tip of the discharge electrode 22 b projects from the tip of the insulating substrate 33 is preferably 2 mm or less.
- the reason why the amount of protrusion is preferable in the above range is that if the amount of protrusion is too large, the ink meniscus does not reach the tip of the discharge portion, making it difficult to discharge, or lowering the recording frequency.
- the space between the first and second insulating substrates 33 and 34 is preferably in the range of 0.1 to 3 mm. The reason that this space is preferable in the above range is that if the space is too narrow, it becomes difficult to supply the ink, making it difficult to discharge, or the recording frequency is lowered, and if the space is too wide, the space is too wide. This is because the meniscus becomes unstable and the ejection becomes unstable.
- the ejection electrode 2 2b is connected to the image data calculation control section 21, and when recording, by applying a voltage to the ejection electrode based on the image information, the ink on the ejection electrode is ejected. Drawing is performed on a plate material (not shown) arranged oppositely.
- the direction opposite to the ink droplet discharge direction of the ink inflow path 37 is connected to a feeding means of an ink supply device (not shown).
- a backing 39 is provided on the surface of the second insulative base material 34 opposite to the surface on which the discharge electrode is formed so as to be spaced apart from each other, and an ink recovery path 38 is provided between the two. It is desirable that the space of the ink collection path 38 be 0.1 mm or more. The reason that this space is preferable in the above range is that if the space is too narrow, it becomes difficult to collect ink, and ink leakage may occur.
- the ink collecting path 38 is connected to an ink collecting means of an ink supply device (not shown).
- a groove 40 may be provided between the discharge unit and the ink collecting path.
- Fig. 6 shows a schematic front view of the discharge head near the ink discharge part.
- the slope of the second insulating base material 34 is located near the boundary between the discharge electrode 22b and the ink recovery path.
- a plurality of grooves 40 are provided toward 38.
- a plurality of the grooves 40 are arranged in the arrangement direction of the discharge electrodes 22 b, and a certain amount of the area near the tip of the discharge electrode is formed from an opening on the discharge electrode 22 b side by a capillary force corresponding to the opening. It has a function of guiding ink and discharging the guided ink to the ink collection path 38.
- the shape of the groove 40 may be any range as long as the capillary force acts, but it is particularly desirable that the width is 10 to 200 ⁇ m and the depth is 10 to 300 / m. Also, the number of grooves 40 is provided in a required number so as to form a uniform ink flow over the entire surface of the head.
- the width of the discharge electrode 22 b is preferably as narrow as possible in order to form a high-quality image. . Specific numerical values vary depending on conditions such as applied voltage and ink substance, but are usually used in the range of 5 to 100 m in tip width.
- FIGS. 7 and 8 show other examples of the discharge head used to carry out the present invention.
- FIG. 7 is a schematic diagram showing only a part of the head for explanation.
- the recording head 22 is composed of a head body 41 made of an insulating material such as plastic, ceramic, glass or the like, and meniscus regulating plates 42, 42 '.
- reference numeral 22b denotes an ejection electrode for applying a voltage to form an electrostatic field in the ejection portion.
- the head body will be described in detail with reference to FIG. 8 in which the control plates 42 and 42 ′ are removed from the head.
- the head body 41 is provided with a plurality of ink grooves 43 for circulating ink perpendicular to the edge of the head body.
- the shape of the ink grooves 43 may be set in a range where the capillary force works so that a uniform ink flow can be formed, but a particularly desirable width is 10 to 200 zm and a depth is 10 to 10 m. 3 0 0 ⁇ m.
- a discharge electrode 22 b is provided inside the ink groove 43.
- the discharge electrode 22b is formed by using a conductive material such as aluminum, nickel, chromium, gold, or platinum on a head body 40 made of an insulating material and using a known material similar to that of the above-described device embodiment.
- the ink groove 43 may be disposed on the entire surface or may be formed only on a part thereof.
- the discharge electrodes are electrically isolated.
- Two adjacent ink grooves form one cell, and discharge parts 45, 45 'are provided at the tip of the partition wall 44 at the center thereof.
- the partition walls are thinner than the other partition portions 44 and are sharpened.
- Such a head body is formed by a known method such as machining, etching, or molding of an insulating material block.
- the thickness of the partition wall at the discharge portion is desirably 5 to 100 / m, and the radius of curvature of the sharpened tip is desirably in the range of 5 to 50 m.
- the tip of the discharge section is slightly chamfered, as in 45 '. May be used. Although only two cells are shown in the figure, the cells are separated by a partition wall 46, and the front end portion 47 is chamfered so as to be retracted from the discharge portions 45, 45 '.
- ink is supplied from an I direction through an ink groove by an ink supply means of an ink supply device (not shown), and ink is supplied to a discharge portion.
- surplus ink is collected in the direction (1) by ink collection means (not shown), and as a result, fresh ink is always supplied to the ejection unit.
- the ink is provided from the discharge unit by applying a voltage to the discharge electrode in accordance with image information to a plate cylinder (not shown) holding the plate material on the surface thereof. An image is formed on the plate material after being discharged.
- the discharge head 22 has a pair of substantially rectangular plate-shaped support members 50 and 50 ′. These support members 50, 50 'are formed of a plate-like plastic, glass, ceramic or the like having a thickness of 1 to 10 mm having an insulating property. A plurality of rectangular grooves 51 and 51 ′ extending parallel to each other are formed according to the resolution. Each of the grooves 51 and 51 'preferably has a width of 10 to 200 m and a depth of 10 to 300 zm, and the discharge electrode 22 b is formed entirely or partially inside. Has been established.
- the discharge head 22 has a plurality of grooves for flowing ink on the outer peripheral surface thereof.
- the grooves 51, 51 'formed in the support members 50, 50' are connected in a one-to-one correspondence via the rectangular portion 54 of the discharge head 22, and each groove is connected.
- the connected rectangular portion 54 is set back from the upper end 53 of the discharge head 22 by a predetermined distance (50 to 500 m).
- each rectangular portion 54 On both sides of each rectangular portion 54, an upper end 55 of each partition 52 of each support member 50, 5 is provided so as to protrude from the rectangular portion 54.
- a guide projection 56 made of an insulating material as described above is provided so as to protrude from each rectangular portion 54 to form a discharge portion.
- the discharge head 22 When ink is circulated through the discharge head 22 configured as described above, ink is applied to each rectangular portion 54 through each groove 51 formed on the outer peripheral surface of one support member 50. Offering It is supplied and discharged through each groove 5 1 ′ formed in the opposite support member 50 ′.
- the discharge head 22 is inclined at a predetermined angle to enable a smooth ink flow.
- the discharge head 22 is inclined such that the ink supply side (support member 50) is located above and the ink discharge side (support member 50 ′) is located below. In this way, when ink is circulated to the discharge head 22, the ink passing through each rectangular portion 54 gets wet along each protrusion 56, and the ink meniscus near the rectangular portion 54 and the protrusion 56. Is formed.
- the ink meniscus is provided so as to face the discharge portion, and is discharged to a plate cylinder (not shown) holding a plate material on its surface.
- a plate cylinder (not shown) holding a plate material on its surface.
- ink is ejected from the ejection section and an image is formed on the plate material.
- a cover for covering the groove on the outer peripheral surface of each support member 50, 50 ' a pipe-like ink flow path is formed along the outer peripheral surface of each support member 50, 50'.
- the ink may be forcibly circulated through the ink flow path. In this case, there is no need to tilt the discharge head 22.
- the head 22 shown in FIGS. 3 to 9 described above can also include a maintenance device such as a recording head cleaning means if necessary.
- a maintenance device such as a recording head cleaning means if necessary.
- wipe the tip of the discharge head with a flexible brush, brush, cloth, etc. circulate only the ink solvent, or use the ink solvent.
- a good drawing state can be maintained by performing means such as supplying only or sucking the discharge portion while circulating the ink alone or in combination. To prevent ink from sticking, it is also effective to cool the head and suppress evaporation of the ink solvent.
- the ink is forcibly sucked from the discharge section, the air, ink, or ink solvent jet is forcibly injected from the ink flow path, or the ink solvent is used. It is also effective to apply ultrasonic waves in a state in which the electrodes are immersed, and these methods can be used alone or in combination.
- FIG. 10 shows an example of the overall configuration of an on-press drawing four-color single-sided lithographic sheet-fed printing apparatus.
- the four-color single-sided lithographic sheet-fed printing press basically includes the printing cylinder 11, blanket cylinder 12, and impression cylinder 13 of the single-color single-sided printing apparatus shown in FIG. 1. Mark on the same side of P It has a structure with four each for printing.
- a known transfer cylinder method or the like is used to transfer the printing paper indicated by K in the figure between adjacent impression cylinders. A detailed description is omitted, but as can be easily seen from the example of FIG.
- the other multi-color single-sided printing apparatuses basically include the plate cylinder 11, blanket cylinder 12, and impression cylinder 13 of the single-color single-sided printing apparatus. It has a structure in which a plurality of printing papers P are provided so that printing is performed on the same side. If only one color plate is to be formed on the plate cylinder, the plate cylinder and blanket cylinder are required for the number of colors to be printed. Having. (Such a printing device is called a unit-type printing device.) On the other hand, a plate cylinder and a blanket cylinder for a plurality of colors share one impression cylinder having a diameter that is an integral multiple of the plate cylinder diameter.
- an impression cylinder type printing apparatus When the present invention is carried out by an impression cylinder type printing apparatus, a structure in which one impression cylinder is shared by plate cylinders and blanket cylinders for the number of colors to be printed, or a plate cylinder and blanket cylinder for a plurality of colors is used.
- a structure in which a plurality of structures share one impression cylinder and the number of plate cylinders and blanket cylinders is equal to the number of colors to be printed may be employed.
- the transfer of the printing paper between the adjacent common impression cylinders can use the known transfer cylinder method or the like.
- the plate cylinder and blanket cylinder are required by the value obtained by dividing the number of colors to be printed by the number of plates on one plate cylinder.
- the impression cylinder diameter should be the same as the plate cylinder diameter for one color, and the impression cylinder should be equipped with a means to hold printing paper until printing for the required color is completed, if necessary.
- a known transfer cylinder method or the like is used for the transfer of the printing paper.
- two-color printing is performed when one impression cylinder holds the printing paper and makes two rotations.
- the printing paper is transferred between the impression cylinders.
- two-color printing is further performed to complete four-color printing.
- the number of impression cylinders may be the same as the number of plate cylinders, but several plate cylinders and blanket cylinders may share one impression cylinder.
- the present invention is embodied as an on-press multicolor two-sided lithographic sheet-fed printing apparatus, a structure in which a known printing paper reversing means is provided between at least one adjacent impression cylinder of the unit printing apparatus described above.
- a structure in which a plurality of the above-described common impression cylinder type printing apparatuses are arranged, and a known printing paper reversing means is provided between at least one adjacent impression pressure The single-sided printing device has a structure in which a plurality of plate cylinders 11 and blanket cylinders 12 are provided so that printing can be performed on both sides of the printing paper P.
- a known printing paper reversing means is provided between at least one adjacent impression cylinder of the unit printing apparatus described above.
- a structure in which a plurality of the above-described common impression cylinder type printing apparatuses are arranged, and a known printing paper reversing means is provided between at least one adjacent impression pressure The single-sided printing device has a structure in which a plurality of plate cylinder
- the plate cylinder and blanket cylinder are provided for the number of colors necessary for printing on both sides of the printing paper.
- the number of plate cylinders, blanket cylinders, and impression cylinders can be reduced. If several plate cylinders and blanket cylinders share one impression cylinder, the number of impression cylinders can be further reduced.
- the impression cylinder will be equipped with a means to hold the printing paper until the printing of the required color is completed, if necessary. The details are omitted because they can be easily understood from the above-described example of the on-press drawing multicolor single-sided lithographic printing press.
- the example of the sheet-fed printing apparatus has been described above as the embodiment of the on-press drawing multicolor lithographic printing apparatus of the present invention.
- the present invention is implemented as an on-press drawing multicolor WEB (winding paper) lithographic printing apparatus
- the above-described unit type and common impression cylinder type can be suitably used.
- a known web reversing means is provided between at least one adjacent impression cylinder in both the unit type and the common impression cylinder type. Structure, a structure having a plurality of sheets so that printing is performed on both sides of the printing paper P can be achieved.
- the most suitable as the on-press drawing multicolor WEB double-sided printing apparatus is the BB (blanket to blanket) type.
- This is a one-color plate cylinder and blanket cylinder (without impression cylinder) for printing one side of the web and a one-color plate cylinder and blanket cylinder (without impression cylinder) for printing the other side.
- the blanket cylinders have a structure in which the blanket cylinders are pressed against each other during printing for the number of colors, and multi-color double-sided printing is achieved by the web passing between the blanket cylinders pressed during printing.
- an on-press lithographic printing apparatus is that a blanket cylinder has two plate cylinders, and when printing is performed on one side, drawing can be performed on the other plate cylinder. .
- the drive of the plate cylinder performing drawing is mechanically independent of the blanket. This makes it possible to draw without stopping the printing press.
- this on-press drawing lithographic printing apparatus can be applied to an on-press drawing multi-color single-sided lithographic printing apparatus and an on-press drawing multi-color double-sided lithographic printing apparatus.
- FIG. 11A and FIG. 11B are overall configuration diagrams of the plate making apparatus.
- Fig. 2 is a schematic configuration example of the drawing unit including the control unit, the ink supply unit, and the head detachment mechanism of the plate making apparatus.
- FIGS. 3 to 9 are diagrams for explaining an ink jet drawing apparatus provided in the plate making apparatus shown in FIGS. 11A and 11B.
- the plate making process according to the present invention will be described with reference to an overall configuration diagram of a plate making apparatus having a structure in which a plate material is mounted on a drawing drum 11 as shown in FIG. 11A.
- the present invention is not limited to the following configuration examples.
- the drum 11 is usually formed of a metal such as aluminum, stainless steel or iron, blast, glass, or the like. Particularly, in the case of a metal drum, its surface is often subjected to, for example, alumite treatment or chrome plating to enhance abrasion resistance and heat resistance.
- the drum 11 may have a heat insulating material on its surface as described later. Further, it is preferable that the drum 11 has a ground function as a counter electrode of the discharge head electrode in the electrostatic field discharge.
- the insulating property of the printing plate base is high, it is preferable to provide a conductive layer on the base. In this case, it is preferable to provide a means for grounding the conductive layer.
- the drawing is facilitated by providing the plate with a means for grounding.
- a known means such as a brush, a panel, or a roller having conductivity can be used.
- the plate making device 1 has an ink jet drawing device 2, which can be used for the plate material mounted on the drum 11 in accordance with the image data sent from the image data calculation control unit 21.
- An oil-based ink is discharged on 9 to form an image.
- the plate making device 1 has a fixing device 5 for strengthening an oil-based ink image drawn on the plate material 9. If necessary, a plate surface desensitizing device 6 used for enhancing the hydrophilicity of the surface of the plate material 9 may be provided.
- the plate making apparatus 1 has dust removing means 10 for removing dust existing on the surface of the plate material 9 before and / or during drawing on the plate material 9, whereby the head and the plate are formed during plate making. It is possible to effectively prevent the ink from adhering to the plate material 9 due to the dust that has entered between the materials, thereby performing good plate making.
- the dust removing means 10 there can be used a contact method using a brush, a roller, or the like, in addition to a known non-contact method such as suction removal, blowing removal, and electrostatic removal.
- a contact method using a brush, a roller, or the like
- suction removal blowing removal
- electrostatic removal In the present invention, air suction or air removal is preferable.
- an automatic plate feeding device 7 that automatically supplies the plate material 9 onto the drum 11 and an automatic plate discharging device 8 that automatically removes the plate material 9 from the drum 11 after drawing is installed.
- the use of the automatic plate feeding device 7 and the automatic plate discharging device 8 makes the plate making operation easier and shortens the plate making time, so that the effects of the present invention can be further enhanced.
- the plate material 9 is mounted on the drum 11 using the automatic plate feeding device 7.
- the printing plate 9 is tightly fixed on the drum 11 by a known method such as a plate head / butt holding device, an air suction device, or an electrostatic method.
- Means are also provided for bringing the plate material 9 into close contact with the drum 11 only around the drawing position of the ink jet drawing device 2, and at least when drawing is performed, the plate material 9 is actuated so that the ink plate drawing device can be used. Contact with 2 can also be prevented.
- the image data arithmetic control unit 21 receives image data from an image scanner, a magnetic disk device, an image data transmission device, etc., performs color separation as needed, and performs appropriate processing on the separated data. The calculation is divided into the number of pixels and the number of gradations. Further, in order to draw an oil-based ink image into a halftone dot using the ink jet head 22 (see FIG. 3 and described in detail later) of the inkjet drawing apparatus 2, the halftone dot area is used. Also, as will be described later, the image data calculation control unit 21 controls the movement of the ink ejection head 22 and the ejection timing of the oil-based ink, and, as necessary, It also controls the operation timing of ram 11 and others.
- the calculation data input to the image data calculation control unit 21 is temporarily stored in a buffer. You.
- the image data calculation control unit 21 rotates the drum 11 to bring the discharge head 22 closer to the position close to the drum 11 by the head separation / contact device 31.
- the distance between the discharge head 2 2 and the surface of the plate 9 on the drum 1 1 is controlled by mechanical distance control such as a contact roller, or control of the head separation / contact device by a signal from an optical distance detector. Is controlled to a predetermined distance during drawing. By this distance control, good plate making can be achieved without the dot diameter becoming uneven due to the lifting of the plate material, and the dot diameter does not change especially when vibration is applied to the plate making machine. it can.
- the main scanning is performed by the rotation of the drum 11 for drawing.
- the arrangement direction of the discharge units is set in the axial direction of the drum 11.
- the discharge head 22 is moved in the axial direction of the drum 11 by one rotation of the drum 11 by the image data calculation control unit 21 so that the oil position is calculated based on the discharge position and the dot area ratio obtained by the above calculation.
- the ink is discharged onto the plate 9 mounted on the drum 11.
- a halftone dot image corresponding to the density of the print original is drawn on the plate material 9 with an oil-based ink. This operation continues until an oil-based ink image for one color of the printing original is formed on the plate material 9 and a printing plate is completed.
- the discharge head 22 is retracted away from a position close to the drum 11.
- This separation / contact means operates so that the ejection head is separated from the drum by at least 500 m except during drawing.
- the detachment operation may be a slide type, or the discharge head 22 may be fixed by an arm fixed to a certain axis, and the arm may be moved around the axis to move like a pendulum.
- the formed oil-based ink image is reinforced by the fixing device 5.
- Known ink fixing means such as heat fixing and solvent fixing can be used.
- Heat fixing is generally performed using infrared lamps, halogen lamps, xenon flash lamps, hot air fixing using a heater, or heat roll fixing.
- the drum is heated, the plate material 9 is heated in advance, drawing is performed while applying hot air, the drum 11 is coated with a heat insulating material, and the drum is fixed at the time of fixing. It is effective to separate the plate material 9 from 11 and to heat only the plate material 9, or to use a method alone or in combination.
- Flash using xenon lamp Fixing is known as a fixing method for electrophotographic toner, and has an advantage that fixing can be performed in a short time.
- the water inside the plate rapidly evaporates due to a rapid rise in temperature, causing a phenomenon called blistering, in which irregularities occur on the plate material surface.
- a plurality of fixing units may be arranged in the rotation direction of the drum 11, and the paper plate material may be gradually heated by changing the distance to the plate material 9 and / or the supplied power.
- solvent fixing a solvent that can dissolve the resin component in the ink, such as methanol or ethyl acetate, is sprayed or exposed to steam, and excess solvent vapor is recovered.
- the plate material 9 is nipped and conveyed by two pairs of capstan rollers 12, and is divided by the image data calculation control unit 21 into an appropriate number of pixels and gradations. Is drawn. It is preferable that a grounding means 13 is provided at a portion where the drawing is performed by the ink jet drawing apparatus 2 so as to be a counter electrode of the discharge head electrode in the electrostatic field discharge, thereby facilitating the drawing. .
- a grounding means 13 is provided at a portion where the drawing is performed by the ink jet drawing apparatus 2 so as to be a counter electrode of the discharge head electrode in the electrostatic field discharge, thereby facilitating the drawing.
- the insulating property of the base of the plate 9 is high, it is preferable to provide a conductive layer on the base. In this case, a known conductive brush, plate panel, roller or the like is used. It is desirable to ground the conductive layer.
- FIG. 11B shows an apparatus using a sheet plate material
- a roll plate material is also suitably used, and in this case, it is desirable to provide a sheet cutter upstream of the automatic plate discharging device.
- the plate making apparatus has an ink jet drawing apparatus 2, which allows an oil-based ink to be placed on the plate material 9 in accordance with the image data sent from the image data calculation control section 21. An ejection image is formed.
- the plate making device 1 has a fixing device 5 for strengthening an oil-based ink image drawn on the plate material 9.
- a plate degreasing device 6 used as necessary for the purpose of enhancing the hydrophilicity of the surface of the plate 9 may be provided.
- the plate making apparatus 1 has dust removing means 10 for removing dust present on the plate material surface before and / or during drawing on the plate material 9.
- the dust removing means 10 in addition to a known non-contact method such as suction removal, blow-off removal, and electrostatic removal, a contact method using a brush, a roller, or the like can be used. In the present invention, air suction or air removal is preferable. Either one or a combination of them can be used.
- an automatic plate feeding device 7 for automatically supplying the plate material 9 and an automatic plate discharging device 8 for automatically removing the plate material 9 after drawing.
- the use of the automatic plate feeding device 7 and the automatic plate discharging device 8 makes the plate making operation easier and shortens the plate making time, so that the effect of the present invention can be further enhanced.
- the plate material 9 is transported by using the automatic plate feeding device 7 and the capstan roller 12. At this time, if necessary, by providing a plate guide means (not shown) or the like, it is possible to prevent the plate head / tail of the plate material from fluttering and coming into contact with the ink jet drawing apparatus 2 and being damaged.
- means for preventing the plate material 9 from being loosened only around the drawing position of the ink jet drawing device 2 is provided, and at least at the time of drawing, the plate material 9 is made to act on the ink jet drawing device 2 Contact can also be prevented. Specifically, for example, there is a method of arranging a pressing roller upstream and downstream of the drawing position. Further, when drawing is not performed, it is desirable to keep the discharge head away from the plate material 9, thereby effectively preventing a problem such as contact damage in the ink jet X-ray drawing device 2. it can.
- the image data from the magnetic disk device or the like is given to an image data calculation control unit 21.
- the image data calculation control unit 21 determines the ejection position of the oil-based ink according to the input image data, and the dot area at that position. Calculate the rate. These calculation data are temporarily backed up. Stored in the file.
- the image data calculation control unit 21 controls the movement of the discharge head 22, the discharge timing control of the oil-based ink, the operation timing control of the capstan roller, and the discharge head 2 as necessary. 2 is moved closer to the position close to the plate material 9 by the head separating device 31.
- the distance between the discharge head 22 and the surface of the printing plate 9 is controlled by mechanical distance control such as a contact roller, or by control of a head separation / contact device based on a signal from an optical distance detector. It is kept at a predetermined distance. With this distance control, good plate making can be achieved without the dot diameter becoming uneven due to the lifting of the plate material, and the dot diameter does not change especially when vibration is applied to the plate making machine. Can be.
- a single-channel head, a multi-channel head, or a full-line head can be used, and sub-scanning is performed by transporting the plate material 9.
- the arrangement direction of the discharge units is set substantially parallel to the traveling direction of the printing plate.
- the discharge head 22 is moved by the image data calculation control unit 21 in a direction orthogonal to the traveling direction of the plate material 9 every time the plate material is moved. Then, the oil-based ink is discharged to the plate material 9 at the discharge position and the dot area ratio obtained by the above calculation.
- a halftone dot image corresponding to the density of the printed document is drawn on the plate material 9 with an oil-based ink. This operation continues until an oil-based ink image of one color of the printing original is formed on the plate material 9 and the printing plate is completed.
- the discharge head 22 is a full line head having a length substantially equal to the width of the plate material 9
- the arrangement direction of the discharge portions is set to a direction substantially orthogonal to the traveling direction of the plate material.
- This separation / contact means operates such that the ejection head is separated from the plate material 9 by at least 500 // m or more except during drawing.
- the separation / contact operation may be a slide type, or the discharge head may be fixed by an arm fixed to a certain axis, and the arm may be moved around the axis to move like a pendulum.
- the formed oil-based ink image is reinforced by the fixing device 5.
- Known ink fixing means such as heat fixing and solvent fixing can be used.
- Heat fixing is generally performed using infrared lamps, halogen lamps, xenon flash lamps, hot air fixing using a heater, or heat roll fixing.
- Flash fixing using a xenon lamp or the like is known as a method for fixing electrophotographic toner, and has an advantage that fixing can be performed in a short time.
- a sudden rise in temperature causes the water inside the plate material to evaporate rapidly, causing a phenomenon called prestering, in which irregularities occur on the plate material surface.
- solvent fixing a solvent that can dissolve the resin component in the ink, such as methanol or ethyl acetate, is sprayed or exposed to steam, and excess solvent vapor is recovered.
- the obtained printing plate is printed by a known lithographic printing method. That is, the printing plate on which the oil-based ink image is formed is mounted on a printing press, a printing ink and a dampening solution are applied to form a printing ink image, and the printing ink image is rotated together with the plate cylinder. The image is transferred onto the blanket cylinder, and then the printing ink image on the blanket cylinder is transferred to the printing paper passing between the blanket cylinder and the impression cylinder, thereby printing one color. After the printing is completed, the printing plate is removed from the plate cylinder, and the blanket on the blanket cylinder is cleaned by the blanket cleaning device to be ready for the next printing.
- FIGS. 14 to 21 show that the print medium is moved by the rotation of the opposed drum according to the present invention.
- FIG. 1 is a diagram illustrating a schematic configuration example of a printing apparatus that performs drawing by performing printing.
- FIGS. 14 to 17 are schematic diagrams showing examples of the configuration of a web-type printing apparatus in which a roll-shaped print medium is stretched by an opposing drum, a print medium supply roll, and a print medium take-up roll or guide roll.
- FIG. 14 shows a single-sided single-color printing apparatus
- FIG. 15 shows a single-sided four-color printing Web apparatus.
- FIGS. 16 and 17 show schematic configuration examples of a two-sided four-color printing apparatus.
- FIG. 18 is a diagram showing a schematic configuration example of a single-sided four-color printing apparatus that cuts a roll-shaped printing medium and winds it around an opposing drum, and Fig. 19 shows a sheet-shaped recording medium.
- FIG. 2 is a diagram illustrating a schematic configuration example of a printing apparatus.
- FIG. 20 and FIG. 21 are diagrams each showing a schematic configuration example of a printing apparatus that performs drawing by nipping and running a print medium with a cap stun roller according to the present invention.
- Reference numeral 20 denotes a printing apparatus using a roll-shaped printing medium
- FIG. 21 shows a schematic configuration example of a printing apparatus using a sheet-shaped recording medium.
- the ink jet printing device (hereinafter also referred to as “printing device”) shown in Fig. 14 is a roll-shaped printing medium supply roll 101, a dust / paper dust removal device 102, a drawing device 103, a drawing device. It comprises an opposing (drawing) drum 104, a fixing device 105, and a print medium take-up roll 106 arranged at a position opposing the device 103 via a print medium.
- the drawing drum is discharged from the ink discharge unit (described later) of the drawing device 103 onto the printing medium.
- An ink is ejected imagewise toward the print medium on 104, and a print image is recorded. After this image is fixed on the print medium using the fixing device 105, the printed print medium is taken up by the print medium take-up roll 106.
- the facing (drawing) drum 104 is a metal roll or a roll having a conductive rubber layer on the surface, or a surface of an insulating drum such as plastic, glass, ceramic, etc., as a counter electrode with respect to the discharge electrode of the ink discharge section.
- a metal layer provided by vapor deposition, plating, or the like is used.
- an effective electric field is formed between the discharge unit of the drawing apparatus 103 and the discharge unit.
- Providing a heating means in the drawing drum 104 and increasing the drum temperature is also effective for improving the drawing quality. Bleeding is further suppressed because the ejected ink droplets are promptly fixed on the print medium.
- the drum temperature constant, the physical properties of the ejected ink droplets on the print medium are controlled, and stable and uniform dot formation can be achieved.
- a contact method using a brush or a roller or the like in addition to a known non-contact method such as suction removal, blow-off removal, and electrostatic removal.
- the drawing apparatus 103 has an ink jet recording apparatus 2 as shown in FIG. Since the description of the ink jet recording apparatus is as described above, the description is omitted here.
- the printing process performed by the printing apparatus will be described in detail below with reference to FIGS.
- the print medium sent out from the print medium supply roll is given tension by the drive of the print medium. Take-up roll, and abuts on the drawing (opposite) drum. Thereby, it is possible to prevent the print medium web from vibrating and coming into contact with the ink jet recording device during drawing to be damaged.
- means for adhering the print medium to the drawing (opposite) drum only around the drawing position of the ink jet recording device is provided, and at least when drawing is performed, this is actuated so that the printing medium can be used for the ink jet recording device. It can also be prevented from coming into contact with the vehicle. Specifically, for example, it is effective to arrange a pressing roller upstream and downstream of the drawing position of the drawing drum, to use guides, and to use electrostatic attraction.
- the image data from the magnetic disk device or the like is given to an image data arithmetic control unit 21.
- the image data arithmetic operation control unit 21 outputs the oil-based ink in accordance with the input image data.
- the halftone dot area ratio is calculated.
- These operation data are temporarily stored in a buffer.
- the image data calculation control unit 21 brings the ejection head 22 closer to a position where the head 22 comes close to the printing medium in contact with the drawing drum by the head separation / contact device 31.
- the distance between the discharge head 22 and the surface of the drawing drum is a mechanical distance such as a contact roller. A predetermined distance is maintained during drawing by controlling the head separation / contact device based on separation control or a signal from an optical distance detector.
- the arrangement direction of the ejection units is set substantially parallel to the running direction of the printing medium, and the main scanning is performed by moving the ejection head in the axial direction of the opposed drum, and the sub-scanning is performed by rotating the opposed drum to perform printing.
- the movement control of the opposing drum and the discharge head described above is performed by the image data calculation control unit 21.
- the discharge head converts the oil-based ink to the print medium at the discharge position and the dot area ratio obtained by the above calculation. Discharge upward. As a result, a dot image corresponding to the density of the print document is drawn on the print medium with the oil-based ink. This operation continues until a predetermined ink image is formed on the print medium.
- the ejection head 22 is retracted away from a position close to the drawing drum to protect the ejection head 22. At this time, only the discharge head 22 may be separated and connected, but the discharge head 22 and the ink supply unit 24 may be separated and connected together.
- This separation / contact means operates so as to separate the recording head from the drawing drum by at least 500 zm except during drawing.
- the detachment / attachment operation may be a slide type, or the head may be fixed by an arm fixed to a certain axis, and the arm may be moved around the axis to move like a pendulum. By retracting the head during non-drawing in this way, it is possible to protect the head from physical damage or contamination and achieve a longer life.
- the formed oil-based ink image is reinforced by the fixing device 105.
- the ink fixing means known means such as heat fixing and solvent fixing can be used. Heat fixing is generally performed using infrared lamps, halogen lamps, xenon flash lamps, hot air fixing using heaters, or heat fixing.
- Flash fixing using a xenon lamp or the like is known as a fixing method of electrophotographic toner, and has an advantage that fixing can be performed in a short time.
- a rapid rise in temperature causes the water inside the paper to evaporate rapidly, causing development called blistering, which causes unevenness on the paper surface. It is preferable to change the power supply and / or the distance between the fixing device and the recording medium so that the temperature of the paper gradually increases, in order to prevent blisters.
- solvent fixing a solvent that can dissolve resin components in the ink such as methanol and ethyl acetate Spray the medium or expose to vapors and collect excess solvent vapors. At least in the process from the formation of the oil-based ink image by the discharge head 22 to the fixing by the fixing device 105, it is desired that nothing is in contact with the image on the print medium. Better.
- FIGS. 15 to 17 show examples of the configuration of a single-sided and double-sided four-color printing apparatus.
- the operation principle and the like can be easily understood from the above description of the single-sided single-color printing apparatus, and a description thereof will be omitted.
- the configuration example of the four-color printing apparatus is shown here, the invention is not limited to this, and the number of colors is arbitrarily determined as needed.
- FIGS. 18 and 19 show another configuration example according to the present invention, which is an explanatory view of a printing apparatus having an automatic discharge device 10 ⁇ and using a print medium wound around an opposing drum.
- FIG. 19 shows an example of an apparatus configuration using a sheet-shaped print medium having an automatic supply apparatus 109.
- a description will be given using an example of an apparatus configuration using a roll-shaped print medium in FIG.
- a print medium that has been pulled out by the print medium supply roll 101 and cut into an arbitrary size by a cutter 8 is mounted on the opposing drum.
- the print medium is tightly fixed on the drum by a mechanical method using a known sheet head / butt holding device, an air suction device, or the like, or an electrostatic method. It is possible to prevent the ink ejection drawing device 103 from being damaged by contact with the device.
- means for adhering the printing medium to the drum only around the drawing position of the ink discharge drawing apparatus is provided, and at least when drawing is performed, the printing medium is brought into contact with the ink jet recording apparatus by acting. This can be prevented.
- a pressing roller is disposed upstream and downstream of the drawing position of the opposing drum.
- the main scanning is performed by the rotation of the opposing drum 104.
- the discharge section is arranged in the axial direction of the opposing drum 104.
- the head 22 is continuously or sequentially moved in the axial direction of the opposing drum by the image data arithmetic control unit 21, and the discharge position obtained by the arithmetic operation of the image data arithmetic control unit 21 is performed.
- the oil-based ink is discharged onto the print medium mounted on the drum 11 at the position and the dot area ratio. As a result, a halftone image corresponding to the density of the print document is drawn on the print medium with the oil-based ink. This operation continues until a predetermined oil-based ink image is formed on the print medium.
- FIG. 20 and FIG. 21 are diagrams showing a schematic configuration example of a printing apparatus for performing drawing by nipping and running a printing medium with the capstan roller according to the present invention. Is a diagram illustrating a schematic configuration example of a printing device using a roll-shaped printing medium, and FIG. 21 is a diagram illustrating a schematic configuration example of a printing device using a sheet-shaped recording medium.
- the print medium M is conveyed while being nipped by two pairs of capstan rollers 110, and divided by the image data calculation control unit (21 in FIG. 2) into an appropriate number of pixels and gradations.
- the image is drawn by the ink discharge drawing device 103 using the data. It is preferable to provide a grounding means 111 to be a counter electrode of the discharge head electrode in the electrostatic field discharge at a portion where the drawing is performed by the ink discharge drawing device 103, whereby the drawing can be easily performed. Become.
- the sheet cutter has a sheet force of 108 upstream of the automatic ejection device 107 for cutting the roll-shaped print medium, but the sheet cutter is arranged at an arbitrary location. Can be placed.
- the printing medium is transported using the cap stun roller 11 °.
- a printing medium guide means (not shown)
- a means for preventing the print medium from sagging only around the drawing position of the ink discharge drawing apparatus is provided, and at least at the time of drawing, it is operated to prevent the print medium from contacting the ink discharge drawing apparatus. It can also be prevented.
- the image data from the magnetic disk device or the like is given to the image data calculation control unit 21 in FIG. 2, and the image data calculation control unit 21 determines the discharge position of the oil-based ink and its position according to the input image data. The calculation of the dot area ratio in is performed. These operation data are temporarily stored in the buffer.
- the image data calculation control unit 21 controls the movement of the ink head 22, the discharge timing control of the oil-based ink, the operation timing control of the capstan roller, and the discharge head 22 as necessary. Is brought closer to the print medium by the head separating device 31.
- the distance between the discharge head 22 and the surface of the print medium is controlled by mechanical distance control such as a contact port, or by control of a head separation / contact device based on a signal from an optical distance detector during drawing. It is kept at a predetermined distance. With this distance control, good printing can be performed without the dot diameter becoming uneven due to the lifting of the print medium, and the dot diameter does not change especially when vibration is applied to the printing device. it can.
- Sub-scanning is performed by transporting the print medium.
- the arrangement direction of the ejection sections is set substantially parallel to the running direction of the print medium.
- the head 22 is moved in a direction perpendicular to the running direction of the printing medium by the image data calculation control section 21 to discharge the oily ink at the discharge position and the dot area ratio obtained by the above calculation.
- a halftone image corresponding to the density of the print document is drawn on the print medium with the oil-based ink. This operation continues until a predetermined oil-based ink image is formed on the print medium.
- the printed print medium is fixed by the fixing device 5 and discharged by the automatic discharge device.
- Examples of printing original plates include metal plates such as aluminum and chrome-plated steel plates. It is. In particular, an aluminum plate having excellent surface water retention and abrasion resistance by graining and anodizing is preferable.
- a plate material provided with an image-receiving layer on a water-resistant support such as water-resistant paper, plastic film, or paper laminated with plastic can be used.
- the thickness of the plate material is suitably in the range of 100 to 300 m, and the thickness of the image receiving layer provided in the plate is suitably in the range of 5 to 30 im.
- a hydrophilic layer composed of an inorganic pigment and a binder, or a layer that can be made hydrophilic by a desensitizing treatment can be used.
- inorganic pigment used in the hydrophilic image receiving layer clay, silica, calcium carbonate, zinc oxide, aluminum oxide, barium sulfate and the like can be used.
- binders include polyvinyl alcohol, starch, carboxymethylcellulose, hydroxyethyl cellulose, casein, gelatin, polyacrylates, polyvinylidone, polymethylether-maleic anhydride copolymer, etc. Can be used. If necessary, a melamine formalin resin, a urea formalin resin, or other crosslinking agent for imparting water resistance may be added.
- examples of the image receiving layer used after the desensitization treatment include a layer using zinc oxide and a hydrophobic binder.
- the zinc oxide used in the present invention may be, for example, zinc oxide, zinc oxide, as described in “Pigment Handbook” edited by the Japan Pigment Technical Association, page 319, Seibundo Co., Ltd. Any of those commercially available as sinter, wet zinc sinter or activated zinc sinter may be used. That is, depending on the starting materials and the production method, zinc oxide includes dry methods such as the French method (indirect method), the American method (direct method), and the wet method. For example, Shodo Chemical Co., Ltd., Sakai Chemical Co., Ltd. Co., Ltd., Hakusui Chemical Co., Ltd., Honjo Chemical Co., Ltd., Toho Zinc Co., Ltd., Mitsui Kinzoku Co., Ltd., and other companies are commercially available.
- the resin used as the binder include styrene copolymer, methacrylate copolymer, acrylate copolymer, vinyl acetate copolymer, polyvinyl butyral, alkyd resin, and epoxy resin. Resins, epoxy ester resins, polyester resins, polyurethane resins and the like. These resins may be used alone or in combination of two or more.
- the content of the resin in the image receiving layer is preferably from 9/91 to 20/80, expressed as a weight ratio of resin / zinc oxide.
- Desensitization of zinc oxide is carried out by a conventional method using a desensitizing solution.
- a desensitizing solution a cyanide-containing processing solution containing a furocyanide salt or a furicyan salt as a main component, and an amine Cyanide-free treatment solution containing cobalt complex, phytic acid and its derivative, guanidine derivative as a main component, treatment solution containing inorganic or organic acid that forms chelate with zinc ion as a main component, or treatment containing water-soluble polymer Liquids and the like are known.
- Japanese Patent Publication No. 44-9045 Japanese Patent Publication No. 46-39403
- Japanese Patent Application Laid-Open No. 52-76101 Japanese Patent Publication No. 57-107889, Nos. 54-117172, and the like.
- the surface of the plate opposite to the image receiving layer preferably has a Beck smoothness in the range of 150 to 700 (sec / l Occ).
- the Beck smoothness can be measured by a Beck smoothness tester.
- the Beck Smoothness Tester is a tester on a highly smooth finished circular glass plate with a hole in the center at a constant pressure (l kgf / cm 2 (9.8 N / cm 2 )). It measures the time required for a fixed amount (1 Occ) of air to pass between the glass surface and the test piece under reduced pressure.
- the printing medium examples include high quality paper, lightly coated paper, and coated paper, which are commonly used printing papers.
- a polyolefin laminated paper having a resin film layer on its surface and a plastic film such as a polyester film, a polystyrene film, a vinyl chloride film, a polyolefin film, and the like can also be used.
- a plastic film or processed paper on which metal is deposited or a metal foil is laminated on the surface can be used.
- special paper and film for ink jet can also be used.
- Oily I link to be used in the present invention the specific electrical resistance 1 0 9 ⁇ cm or more and a dielectric constant 3.
- Solid and hydrophobic resin particles are dispersed in at least room temperature at least 5 non-aqueous solvents.
- Electrical resistivity 1 0 9 ⁇ cm or more for use in the present invention and a dielectric constant 3.5 or less as a preferably non-aqueous solvent linear or branched aliphatic hydrocarbons, alicyclic hydrocarbons or aromatic hydrocarbons, There are hydrogen and halogen-substituted forms of these hydrocarbons.
- the electric resistance of the non-aqueous solvent used is set to the above range because, when the electric resistance is low, concentration of resin particles and the like becomes difficult to occur, and sufficient printing durability cannot be obtained.
- the reason why is set to the above range is that when the dielectric constant increases, the electric field is alleviated due to the polarization of the solvent, whereby the ejection of the ink tends to deteriorate.
- the resin particles dispersed in the above non-aqueous solvent may be hydrophobic resin particles which are solid at a temperature of 35 ° C or less and have good affinity with the non-aqueous solvent.
- the resin (P) having a glass transition point of 15 ° C to 110 ° C or a softening point of 33 ° C to 140 ° C is preferred, and a glass transition point of 10 ° C to 100 ° C is more preferred.
- the affinity between the surface of the image receiving layer of the printing plate and the resin particles increases, and the bonding between the resin particles on the printing plate becomes stronger.
- the adhesion between the image area and the image receiving layer is improved, and the printing durability is improved.
- the affinity between the image receiving surface and the resin particles decreases, and the bond between the resin particles decreases. I will.
- the weight average molecular weight Mw of the resin (P) is, LXL 0 a 3 ⁇ lxl 0 6, preferably 5 x 1 0 3 ⁇ 8 xl 0 5, more preferably 1 xl 0 4 ⁇ 5 xl 0 5 .
- Such a resin (P) include an olefin polymer and a copolymer (for example, polyethylene, polypropylene, polyisobutylene, an ethylene-vinyl acetate copolymer, an ethylene-acrylate copolymer, an ethylene-acrylate copolymer).
- a copolymer for example, polyethylene, polypropylene, polyisobutylene, an ethylene-vinyl acetate copolymer, an ethylene-acrylate copolymer, an ethylene-acrylate copolymer.
- the content of the dispersed resin particles in the oil-based ink of the present invention is:
- the content is preferably 0.5 to 20% by weight of the entire ink. If the content is low, it becomes difficult to obtain an affinity between the ink and the surface of the printing original plate, so that a good image cannot be obtained, and problems such as reduced printing durability tend to occur. On the other hand, as the content increases, There are problems that it is difficult to obtain a uniform dispersion, that the ink flow in the discharge head tends to be uneven, and that stable ink discharge is difficult to obtain.
- the oil-based ink used in the present invention preferably contains a coloring material as a coloring component together with the above-mentioned dispersed resin particles for the purpose of plate inspection of a plate after plate making.
- any pigments and dyes conventionally used in oil-based ink compositions or liquid developers for electrostatography can be used.
- pigments those generally used in the technical field of printing can be used regardless of whether they are inorganic pigments or organic pigments.
- pigments such as lindrinone pigments, dioxazine pigments, styrene pigments, perylene pigments, perinone pigments, thioindigo pigments, quinophthalene pigments, and metal complex pigments are used without particular limitation. be able to.
- Dyes include azo dyes, metal complex dyes, naphthol dyes, anthraquinone dyes, indigo dyes, carbonium dyes, quinone imine dyes, xanthene dyes, aniline dyes, quinoline dyes, nitro dyes, and nitroso dyes.
- Oil-soluble dyes such as dyes, benzoquinone dyes, naphthoquinone dyes, phthalocyanine dyes and metal phthalocyanine dyes are preferred.
- pigments and dyes may be used alone or in an appropriate combination, but may be contained in the range of 0.01 to 5% by weight based on the whole ink. desirable.
- coloring materials may be dispersed in a non-aqueous solvent as the coloring materials themselves as dispersed particles separately from the dispersed resin particles, or may be contained in the dispersed resin particles.
- a method of coating the pigment or the like with the resin material of the dispersed resin particles to obtain resin-coated particles is generally used, and a method of coloring the surface portion of the dispersed resin particles into colored particles with a dye or the like. Which is common.
- the resin particles dispersed in the non-aqueous solvent of the present invention further including colored particles, etc.
- the average particle size of these particles is preferably from 0.05 to 5 m. It is more preferably 0.1 m to 1.5 / m.
- the particle size was determined by CAP A-500 (trade name, manufactured by Horiba, Ltd.).
- the non-aqueous dispersion resin particles used in the present invention can be produced by a conventionally known mechanical pulverization method or polymerization granulation method.
- a mechanical pulverization method if necessary, materials to be resin particles are mixed, melted and kneaded, and then directly pulverized by a conventionally known pulverizer into fine particles, and a dispersed polymer is used in combination.
- Dispersion using a wet disperser for example, a pole mill, paint mill, Keddy mill, Dyno mill, etc.
- a wet disperser for example, a pole mill, paint mill, Keddy mill, Dyno mill, etc.
- kneading by pre-kneading the material that will be the resin particle component and the dispersing aid polymer (or coating polymer) And then pulverized and then dispersed in the presence of a dispersing polymer.
- a method for producing a paint or a liquid developer for electrostatography can be used.
- these are described in “Paint Flow and Pigment Dispersion,” edited by Kenji Ueki, Kyoritsu Shuppan (1977). 1 year), Solomon "Paint Science” Hirokawa Shoten (19669), Yuji Harasaki “Coating Engineering” Asakura Shoten (1971), Yuji Harasaki “Basic Science of Coating” Horizontal bookstore (1977).
- a dispersed polymer is used in combination to stabilize the dispersed particles in a non-aqueous solvent.
- the dispersed polymer contains a repeating unit soluble in a non-aqueous solvent as a main component, and has an average molecular weight of preferably 1 ⁇ 10 3 to 1 ⁇ 10 6 in weight average molecular weight Mw, more preferably 5 ⁇ 1 °. 3 is in the range of ⁇ 5 X 1 0 5.
- Preferred examples of the soluble repeating unit of the dispersion polymer used in the present invention include a polymerization component represented by the following general formula (I).
- General formula W
- X! Represents one C O O—, one C O— or 10—.
- R represents an alkyl group or an alkenyl group having carbon atoms of I0 to 32, preferably an alkyl group having carbon atoms of I0 to 22, or an alkenyl group;
- a and a 2 may be the same or different from each other, and include a hydrogen atom, a halogen atom (eg, a chlorine atom or a bromine atom), a cyano group, an alkyl group having 1 to 3 carbon atoms (eg, a methyl group) , Ethyl group, propyl group, etc.), one C 00 — or one CH 2 C 00 -ZJ [Z i is an optionally substituted hydrocarbon group having 22 or less carbon atoms (eg, alkyl group, alkenyl Group, aralkyl group, alicyclic group, aryl group, etc.].
- preferred hydrocarbon groups include alkyl groups having 1 to 22 carbon atoms which may be substituted (for example, methyl group, ethyl group, propyl group, and butyl group). , Hexyl, heptyl, octyl, nonyl, decyl, dodecyl, tridecyl, tetradecyl, hexadecyl, octadecyl, eicosanyl, docosanyl, 2-chloroethyl , A 2-bromoethyl group, a 2-cyanoethyl group, a 2-methoxycarbonylethyl group, a 2-methoxyl group, a 3-bromocarbyl group, etc., and an optionally substituted alkenyl group having 4 to 18 carbon atoms.
- Optionally substituted aralkyl groups for example, benzyl group, phenethyl group, 3-phenylpropyl group, naphthylmethyl group, 2-naphthylethyl group, cyclobenzyl group, bromobenzyl group, methylbenzyl group, ethylbenzyl group, methoxy group
- a benzyl group, a dimethylpentyl group, a dimethoxybenzyl group, etc. an optionally substituted alicyclic group having 5 to 8 carbon atoms (eg, a cyclohexyl group, a 2-cyclohexylethyl group, a 2-cycloalkyl group) Pentylethyl group, etc.) and an optionally substituted aromatic group having 6 to 12 carbon atoms (e.g., phenyl, naphthyl, tolyl, xylyl, propylphenyl, butylphen
- the dispersing polymer may contain another repeating unit as a copolymer component together with the repeating unit represented by the general formula (I).
- the other copolymer component any compound may be used as long as it is composed of a monomer copolymerizable with a monomer corresponding to the repeating unit of the general formula (I).
- the proportion of the polymer component represented by the general formula (I) in the dispersed polymer is preferably 50% by weight or more, more preferably 60% by weight or more.
- dispersing polymers include: No. 10-204, 354, No. 10, 204, 356, No. 10, 25, 336, and No. 10-3. Nos. 0 6 244, 10- 3 16 9 17 and 10- 3 169 20
- the dispersion stabilizing resins (Q-1 ) can also be used.
- Solprene 125 manufactured by Asahi Kasei Corporation
- the dispersion polymer is preferably added in advance during polymerization when the resin (P) particles are produced as a dispersion (latex) or the like.
- the amount added is about 1 to 50% by weight based on the resin for particles (P).
- the dispersed resin particles and colored particles (or coloring material particles) in the oil-based ink of the present invention are preferably positively charged or negatively charged electroconductive particles.
- it can be achieved by appropriately using a technique of a developer for wet electrostatography.
- the charge controlling agent as described above is preferably used in an amount of 0.001 to 1.0 part by weight based on 100 parts by weight of the dispersion medium as the carrier liquid. Further, various additives may be added if desired. The upper limit of the total amount of these additives is regulated by the electric resistance of the oil-based ink. That is, since the quality of continuous tone images when the specific electrical resistance of I ink in a state of removing the dispersed particles is lower than 1 0 9 ⁇ cm can not be obtained, the amount of each additive, con within this limit It is desirable to troll.
- a mixed solution of 10 g of a dispersion stabilizing resin (Q-1) having the following structure, 100 g of vinyl acetate and 84 g of Isopa-H3 was heated to a temperature of 70 ° C while stirring under a nitrogen stream.
- 2,2'-asobis (isovaleronitrile) (A.I.V.
- Mw 5X10 4 (numerical weight ratio) the white dispersion, a centrifuge (rotational speed 1 X 1 0 4 r. P . M., During rotation between 60 minutes) over a, the resin particles content of sediment The trapped 'dry'. Weight average molecular weight of the resin particles was (Mw: in terms of polystyrene GP C value) 2 x 1 0 5, glass transition point (T g) was 3 8 ° C.
- a 0.12 mm thick aluminum plate subjected to graining and anodizing treatment was mounted on the plate cylinder and the plate head by a mechanical device provided on the plate cylinder. Release the dampening water supply device, print ink supply device, and blanket cylinder so that they do not come in contact with the plate material, remove dust on the plate material surface by suction with an air pump, and then move the discharge head to the drawing position. ,
- the image data to be printed is transmitted to the image data arithmetic and control unit, and the oil-based ink is ejected onto the aluminum plate by rotating the plate cylinder and moving the ejection head for 64 channels to print the image. Formed.
- the width of the tip of the ejection electrode of the ink head is set at 10 / m, and the distance between the head and the plate is always 1 mm according to the output from the optical gap detector.
- a voltage of 2.5 KV is always applied as a bias voltage, and a 500 V pulse voltage is further superimposed upon ejection, and the pulse voltage is reduced from 0.2 msec to 0.05 V.
- Drawing was performed by changing the area of the dot by changing it in 256 steps in the range of milliseconds. No drawing failures due to dust were seen at all, and no image deterioration due to a change in the dot diameter was observed even when the outside air temperature changed or the number of plate making increased, and good plate making was possible.
- the image was strengthened by heating with a xenon flash fixing device (Emission: 200 J / pulse, manufactured by Shio Electric Co., Ltd.), and a printing plate was prepared.
- the ink jet recording device was retracted 50 mm from the position close to the plate cylinder together with the sub-scanning means to protect the ink.
- printing was performed using the normal lithographic printing method as described above.
- Printing on coated paper was performed. That is, a printing image is formed by applying a printing ink and a fountain solution, and the printing ink image is transferred onto a rotating blanket cylinder together with the plate cylinder, and then a gap between the blanket cylinder and the impression cylinder is formed.
- the printed ink image on the blanket cylinder was transferred onto the passing coated paper for printing.
- the obtained printed matter was an extremely clear image without any skipping or blurring in the printed image even after passing through 10,000 sheets.
- isopar G is supplied to the head for 10 minutes after the end of plate making. After cleaning the head by opening the head with the isopa G dripping from the head opening, the head is stored for three months by storing the head in a cover filled with the vapor of the isopa G. Good prints could be produced without the need for work.
- Example 1-11 when drawing was performed under the same conditions except that a 64 channel multi-channel head of 200 dpi (electrode interval: 127 fim) was used, the results are shown in FIGS. 12 and 13. The phenomenon shown was remarkable, the dots to be discharged disappeared, and the discharge dots from the edge electrodes at both ends caused a maximum spacing error of 50%, which was unacceptable for evaluation.
- a circulation pump was used as stirring means, and a 100 di, 256-channel multi-channel head of the type shown in FIG. 5, FIG. 7 or FIG. 9 was arranged.
- a pump Using a pump, an ink reservoir is provided between the pump and the ink inflow path of the discharge head, and between the ink recovery path of the discharge head and the ink tank, and ink is circulated by the hydrostatic pressure difference between them.
- the heater and the above-mentioned pump were used as the ink temperature management means, and the ink temperature was set at 35 ° C and controlled by a thermostat.
- the circulation pump was also used as a stirring means for preventing precipitation and coagulation.
- a conductivity measuring device was placed in the ink flow path, and the concentration of the ink was controlled by diluting the ink or feeding the concentrated ink based on the output signal.
- the plate material the above-described aluminum plate was similarly mounted on a plate cylinder of a lithographic printing apparatus. After removing dust from the surface of the plate using a rotating brush made of nylon, the image data to be printed is transmitted to the image data calculation control unit, and the full-line drawing is performed while rotating the plate cylinder. An oil-based ink was discharged onto the aluminum plate to form an image.
- On-machine drawing 4-color single-sided lithographic printing machine uses a 50 dpi, 128 channel multi-channel head as shown in Fig. 7 as a discharge head for the inkjet recording device. Gear adjustment (gap 0.8 mm) with a contact roller made of steel.
- the same operation as in Example 1 was performed except that the ink was supplied to the ink tank by the number of drawn sheets as the ink density control means, and 500 plates were made. As a result, there was no effect of drawing defects due to dust or changes in outside temperature. Due to the increase in the number of plate making, there was some change in the dot diameter, but it was within the range where there was no effect.
- the plate-making plate was also irradiated with a halogen lamp (QIR manufactured by Shio Electric Co., Ltd., power consumption: 1.5 kW), and fixed by spraying with ethyl acetate.
- a halogen lamp QIR manufactured by Shio Electric Co., Ltd., power consumption: 1.5 kW
- Example 1 The same operation as in Example 1 was performed except that a paper plate material provided with a hydrophilic image receiving layer on the surface shown below was used instead of the aluminum plate of Example 1-1.
- the obtained printed matter was an extremely clear image without any skipping or blurring in the printed image even after passing through 10,000 sheets.
- Example 11 instead of the aluminum plate of Example 1, a plate material provided with an image-receiving layer that can be made hydrophilic by desensitization treatment was used on the surface shown below, and a plate surface desensitization treatment device was used after the printing plate was prepared. Except that the non-image area was hydrophilized using, and the plate conductive layer was grounded by contact with a conductive panel (phosphor bronze) during drawing, and fixing was performed by applying hot air to the plate. Example 11 The same operation as in Example 1 was performed.
- the substrate on both surfaces of polyethylene off Ilm a thickness of 2 0 m laminating one preparative and under Symbol of the following composition in water resistance and the paper support on the as to the conductive layer coating prepared was applied to one surface, so as to become 1 0 g / m 2 as dried coating weight, further 1 5 g / m 2 of dispersion B as dried coating amount thereon
- An image receiving layer was provided so as to obtain a plate material.
- Paint for conductive layer Rybon Black (30% aqueous dispersion) 5.4 parts, Clay (5 °% aqueous dispersion) 54.6 parts, SBR latex (solid content 50%, Tg 25) (° C) 36 parts, 4 parts of melamine resin (solid content 80%, Sumire Resin SR-6 13) are mixed, and water is added so that the total solid content is 25%. Paint.
- Dispersion B 100 g of dry zinc oxide, 3 g of binder resin (B-1) with the following structure, binding A mixture of 17 g of resin (B-2), 0.15 g of benzoic acid and 155 g of toluene was mixed at 8 rpm at 6,000 rpm using a wet disperser homogenizer (manufactured by Nippon Seiki Co., Ltd.). Dispersed for minutes. Binder resin (B-1)
- the plate making machine (see Fig. 11A and Fig. 2) 1 Ink jet seconds filled the machine with 2 liters of oil-based ink (IK-1) in the ink tank.
- IK-1 oil-based ink
- a 150 dpi, 64 channel multi-channel head shown in Fig. 4 was used as the discharge head.
- an ink temperature control means a throw heater and a stirring blade were installed in the ink tank, the ink temperature was set to 30 ° C, and the temperature was controlled by a thermostat while rotating the stirring blade at 30 rpm. .
- one stirring blade was also used as a stirring means for preventing sedimentation and coagulation.
- the ink flow path is partially transparent, and an LED light-emitting element and a light-detecting element are interposed between them.
- the output signal from the LED diluent (Isopar G) or the concentrated ink (the above ink) The solid concentration of (IK-1) was adjusted twice. 2) Concentration control by injection was performed.
- a grained and anodized 0.12 mm-thick aluminum plate was mounted on the drum of the plate-making apparatus, with the top and bottom of the plate held by a mechanical device. After removing dust from the surface of the plate material by suction with an air pump, move the discharge head close to the plate material to the drawing position, transmit the image data to be made to the image data calculation control unit, and rotate the drum. By moving the four-channel ejection head, oil-based ink was ejected onto the aluminum plate to form an image. At this time, the tip width of the ejection head of the ink head was set to 10 m, and the distance between the head and the plate material was controlled to be 1 mm by the output from the optical gear detector.
- a voltage of 2.5 KV is constantly applied as a bias voltage, and a 500 V pulse voltage is further superimposed upon ejection, and the pulse voltage is reduced from 0.2 milliseconds to 0.0.
- Drawing was performed while changing the area of the dot by changing it in 256 steps in the range of 5 milliseconds. There were no drawing defects due to greetings, and no image deterioration due to changes in the dot diameter was observed even when the outside air temperature changed or the number of plate making increased, and good plate making was possible.
- the image was further strengthened by heating with a xenon flash fixing device (Emission: 200 J / pulse, manufactured by Shio Electric Co., Ltd.), and a printing plate was prepared.
- a xenon flash fixing device Emission: 200 J / pulse, manufactured by Shio Electric Co., Ltd.
- the ink jet drawing device was retracted 50 mm from the position close to the drum together with the sub-scanning means, and then the printing plate was taken out of the plate making device. It was mounted on the plate cylinder of a printing press and printing was performed.
- the obtained printed matter was an extremely clear image without any skipping or blurring in the printed image even after passing through 10,000 sheets.
- a 100-dpi, 256-channel multi-channel head of the type shown in FIG. 5 was arranged in the apparatus shown in FIG. 11B.
- a pump is used to circulate ink, and the pump and the discharge head have an ink inflow passage, and a discharge head has an ink recovery passage and an ink tank.
- Ink reservoirs are placed between the ink tanks, and the ink is circulated by the difference in hydrostatic pressure between them. Set to ° C and controlled by thermostat.
- the circulation pump was also used as a stirring means for preventing precipitation and aggregation.
- a conductivity measuring device was installed in the ink flow path, and the concentration of the ink was controlled by diluting the ink or feeding the concentrated ink based on the output signal.
- the above-described aluminum plate was similarly mounted on a drum of a plate making apparatus. After removing dust from the plate surface with a nylon rotating brush, the image data to be made is transmitted to the image data calculation control unit, and the multi-channel head is moved in the plate moving direction. Along with the movement, the plate material was conveyed by a capstan roller, and an oil-based ink was discharged onto the aluminum plate to form an image. No poor drawing due to dust was observed at all, and no image deterioration due to changes in dot appearance was observed even when the outside air temperature changed or the number of plate making increased, and good plate making was possible. Further heating (pressure: 3 kgf / cm 2 (29.4 N / cm 2 )) by fixing the heater (Teflon sealed silicone rubber roller with a 300 W halogen lamp) to strengthen the image Created a version.
- Example 2-1 a plate material provided with an image-receiving layer capable of being rendered hydrophilic by desensitization treatment was used on the surface shown below, and a plate surface desensitization treatment device was prepared after the printing plate was prepared. Except that the non-image area was hydrophilized using, and the plate conductive layer was grounded by contact with a conductive panel (phosphor bronze) during drawing, and fixing was performed by applying hot air to the plate. The same operation as in Example 1 was performed.
- Paint for conductive layer carbon black (30% aqueous dispersion) 5.4 parts, clay (50% aqueous dispersion) 54.6 parts, SBR latex (solid content 50%, Tg 25 ° C) 36 parts) and 4 parts of melamine resin (solid content 80%, Sumiretz Resin SR-6 13) were mixed, and water was added so that the total solid content was 25% to obtain a paint.
- Dispersion A 100 g of dry zinc oxide, 3 g of the above binder resin (B-1), 17 g of the binder resin (B-2), 0.15 g of benzoic acid and 1.55 g of toluene was dispersed for 8 minutes at a rotational speed of 6,000 rpm using a wet disperser homogenizer (manufactured by Nippon Seiki Co., Ltd.).
- Two liters of the oil-based ink (IK-11) prepared as described above was filled in an ink tank of an ink jet recording device of a drawing device of a printing device shown in Fig. 14.
- a 150 dpi, full-line head of the type shown in FIG. 5 was used as the discharge head.
- a throw heater and stirring blades are installed in the ink tank as ink temperature management means, the ink temperature is set to 30 ° C, and the temperature control is performed by thermostat while rotating the stirring blades at 30 rpm. did.
- the stirring blade was also used as a stirring means for preventing sedimentation and coagulation.
- the ink flow path is partially transparent, and an LED light-emitting element and a light-detecting element are arranged with the ink flow path interposed therebetween.
- the output signal of the light-emitting element dilutes the ink (Isopa G) or the concentrated ink (see above).
- the solid concentration of IK-1 ink was adjusted twice. 2) Concentration control by injection was performed. A mouth-shaped fine coated paper as a print medium was provided on a facing drum and transported.
- Drawing was performed while changing the area of the dot by changing it in 256 steps in the range of 5 milliseconds. No drawing failures due to dust were seen at all, and no image deterioration due to changes in the dot diameter or the like was observed even when the outside air temperature changed or the printing time increased, and good printing was possible.
- the image was solidified by heating with a xenon flash fixing device (Emission: 200 J / pulse, manufactured by Shio Electric Co., Ltd.). After printing, the inkjet recording device was retracted 50 mm from a position close to the drawing drum to protect the inkjet head.
- a xenon flash fixing device Emission: 200 J / pulse, manufactured by Shio Electric Co., Ltd.
- the obtained printed matter was an extremely clear image without any skipping or blurring in the printed image. Also, for 10 minutes after printing is completed, supply ISOPA-G to the head, drip ISOPA-G from the head opening and clean it, and then apply it to a power bar filled with the vapor of ISOPA-G. By storing the heads, good prints could be produced for three months without the need for maintenance work.
- a 100 dpi, 256 channel of the type shown in FIG. 5 or FIG. 4 was used, and heads were arranged so that the ejection parts for 64 channels were arranged in a direction perpendicular to the axial direction of the drum.
- Oil-based inks were the same as IK-1 ink except that black ink IK-1 and Nig Mouth Synth used as a colorant for IK-1 ink were replaced with phthalocyanine.
- the cyan ink IK-1 was prepared in the same manner as the IK-1 ink, except that the nig mouth used as a colorant for the IK-1 ink was replaced with CI pigment red 57: 1.
- Yellow ink IK-3 which was prepared in the same manner as IK-11 ink, except that CI gross toyener 14 was used instead of the two grossine used as the colorant for Magenta Ink IK-3 and IK-1 ink Four inks of four colors were used, and each of them was filled into four heads.
- a pump is used, and ink reservoirs are provided between the pump and the ink inflow path of the discharge head, and between the ink recovery path of the discharge head and the ink tank, and the ink circulation is performed by the difference in hydrostatic pressure between them.
- the heater and the above-mentioned pump were used as the ink temperature management means, the ink temperature was set at 35 ° C, and the thermostat was controlled.
- the circulation pump was also used as a stirring means for preventing precipitation and aggregation.
- a conductivity measuring device was placed in the ink flow path, and the concentration of the ink was controlled by diluting the ink or feeding the concentrated ink based on the output signal.
- the image data to be printed is transmitted to the image data calculation control unit, the head is moved in the drum axis direction, main scanning is performed, and the drawing drum is moved.
- An image was formed by discharging ink on a roll of fine coated paper by performing sub-scanning while rotating and drawing.
- the head was circulated through the isopar G, and the nonwoven cloth containing the isopar G was brought into contact with the tip of the head for cleaning.No maintenance was required for three months. In addition, good printed matter was produced.
- a high-quality image can be stably provided by an electrostatic ink jet recording method using a multi-channel head drawing apparatus. For this reason, printing on plastic sheets as well as ordinary printing paper is possible. Further, the present invention can be applied to a digital plate making apparatus or an on-press drawing printing apparatus which does not require a developing process, and can produce a large number of clear, high-quality printed materials at low cost and easily.
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Or Reproduction Of Printing Formes (AREA)
- Ink Jet Recording Methods And Recording Media Thereof (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE60038491T DE60038491T2 (de) | 1999-05-31 | 2000-05-31 | Lithographisches verfahren und lithographische vorrichtung, verfahren und vorrichtung zur herstellung einer druckplatte und verfahren und vorrichtung zum tintenstrahldrucken |
EP00935499A EP1199163B1 (en) | 1999-05-31 | 2000-05-31 | Lithographic method and lithographic device, plate making method and plate making device, and ink jet printing method and printing device |
US09/980,112 US6834586B1 (en) | 1999-05-31 | 2000-05-31 | Lithographic method and lithographic device, plate making method and plate making device, and ink jet printing method and printing device |
Applications Claiming Priority (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11152865A JP2000334961A (ja) | 1999-05-31 | 1999-05-31 | インクジェット記録方法及びそれを用いた平版印刷方法 |
JP11/152865 | 1999-05-31 | ||
JP34078799A JP2001150788A (ja) | 1999-11-30 | 1999-11-30 | 機上描画平版印刷方法及び機上描画平版印刷装置 |
JP11/340787 | 1999-11-30 | ||
JP34632399 | 1999-12-06 | ||
JP11/346323 | 1999-12-06 | ||
JP11/363271 | 1999-12-21 | ||
JP36327199A JP2001171103A (ja) | 1999-12-21 | 1999-12-21 | インクジェット式印刷方法及び印刷装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000073065A1 true WO2000073065A1 (fr) | 2000-12-07 |
Family
ID=27473186
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2000/003493 WO2000073065A1 (fr) | 1999-05-31 | 2000-05-31 | Dispositif et procede de lithographie, dispositif et procede de fabrication de plaques, et dispositif et procede d'impression par jet d'encre |
Country Status (4)
Country | Link |
---|---|
US (1) | US6834586B1 (ja) |
EP (1) | EP1199163B1 (ja) |
DE (1) | DE60038491T2 (ja) |
WO (1) | WO2000073065A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2843558A1 (fr) | 2002-08-13 | 2004-02-20 | Jean Marie Nouel | Procede de copie d'une plaque pour impression en offset humide |
US6843553B2 (en) | 1999-12-21 | 2005-01-18 | Fuji Photo Film Co., Ltd. | Ink jet printing method and printing apparatus |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2005254589A (ja) * | 2004-03-11 | 2005-09-22 | Fuji Photo Film Co Ltd | インクジェット記録装置およびインクジェット記録装置の制御方法 |
EP1742801A1 (en) * | 2004-05-05 | 2007-01-17 | Glunz & Jensen A/S | System and method for inkjet printing |
US20060061610A1 (en) * | 2004-09-17 | 2006-03-23 | Fuji Photo Film Co., Ltd. | Image forming apparatus |
US7514114B2 (en) * | 2005-09-01 | 2009-04-07 | Palo Alto Research Center Incorporated | Detecting defective ejector in digital lithography system |
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Cited By (2)
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---|---|---|---|---|
US6843553B2 (en) | 1999-12-21 | 2005-01-18 | Fuji Photo Film Co., Ltd. | Ink jet printing method and printing apparatus |
FR2843558A1 (fr) | 2002-08-13 | 2004-02-20 | Jean Marie Nouel | Procede de copie d'une plaque pour impression en offset humide |
Also Published As
Publication number | Publication date |
---|---|
DE60038491T2 (de) | 2009-05-07 |
US6834586B1 (en) | 2004-12-28 |
EP1199163B1 (en) | 2008-04-02 |
EP1199163A1 (en) | 2002-04-24 |
EP1199163A4 (en) | 2004-07-07 |
DE60038491D1 (de) | 2008-05-15 |
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