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WO1999064250A1 - Procede et dispositif de traitement d'un imprime destines a l'industrie graphique - Google Patents

Procede et dispositif de traitement d'un imprime destines a l'industrie graphique Download PDF

Info

Publication number
WO1999064250A1
WO1999064250A1 PCT/CH1999/000147 CH9900147W WO9964250A1 WO 1999064250 A1 WO1999064250 A1 WO 1999064250A1 CH 9900147 W CH9900147 W CH 9900147W WO 9964250 A1 WO9964250 A1 WO 9964250A1
Authority
WO
WIPO (PCT)
Prior art keywords
outer layer
layer
heating
inductor
printing form
Prior art date
Application number
PCT/CH1999/000147
Other languages
German (de)
English (en)
Inventor
Max Dätwyler
Original Assignee
Mdc Max Dätwyler Bleienbach Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mdc Max Dätwyler Bleienbach Ag filed Critical Mdc Max Dätwyler Bleienbach Ag
Publication of WO1999064250A1 publication Critical patent/WO1999064250A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N3/00—Preparing for use and conserving printing surfaces

Definitions

  • the present invention relates to a method for treating a printing form for the graphic industry ge ass the preamble of claim 1 and an apparatus for performing this method.
  • a gravure form of this type in which a metallic base body, e.g. consists of steel, a base layer of copper is applied.
  • a metallic outer layer which consists of zinc or a zinc alloy, lies on this base layer.
  • Grid cups are engraved in this outer layer, which are intended to hold the printing ink. After engraving the cups, the outer layer, which is also made of another material, e.g. Copper, with a cover layer made of a wear-resistant material, e.g. Chrome plated.
  • the gravure cylinder After the printing process has been completed, the gravure cylinder must be prepared for a next printing or engraving process by removing the cover layer and at least part of the outer layer.
  • This removal of the top and outer layers can e.g. done by galvanic means, but this has the disadvantage that the disposal of the resulting wastewater is very complex.
  • galvanic means e.g. galvanic means
  • the present invention is based on the object of providing a method and a device of the type mentioned at the outset which, after the printing process has ended, allow the outer layer, including any cover layer, to be removed in a reliable manner without the base layer lying under the outer layer injure and dispose of the removed material in an environmentally friendly manner.
  • the outer layer and at least part of the base layer are heated.
  • the material of the outer layer changes in such a way that the outer layer separates from the base layer, specifically at the parting surface
  • Base layer / outer layer After cooling, which can of course take place, but is preferably accelerated with the aid of a coolant or quenching agent, the material of the detached outer layer is in solid metallic form and can thus be disposed of without any problems.
  • Fig. 1 in perspective a gravure cylinder with a
  • Heating device for peeling off the outer layer together with the cover layer
  • FIG. 2 shows a longitudinal section of one end of the gravure cylinder according to FIG. 1.
  • a gravure cylinder 1 is shown in perspective view as an example of a printing form for the graphics industry, of which the area of one end is shown in longitudinal section in FIG. 2.
  • the intaglio cylinder 1 has a hollow cylindrical base body 2 made of steel.
  • This base body 2 can also consist of another material, such as aluminum or plastic.
  • the base body 2 is provided on the end face with bearing shafts 3.
  • a base layer 4 made of copper is applied to this base body 2 in a known manner, preferably galvanically.
  • This base layer can optionally also consist of another suitable metallic material.
  • a metallic outer layer 5, which has likewise been applied galvanically, is connected to this base layer 4, which serves as a base layer.
  • This outer layer 5 consists of zinc or a zinc alloy.
  • Grid cups are formed in this outer layer 5, which are not shown in FIG. 2. These pits are preferably lifted out by means of laser beams, as is described in more detail in EP-B-0 473 973. To protect the outer layer 5 is this covered with a cover layer 6 made of a wear-resistant material, preferably chrome. Other suitable materials can also be used for this cover layer 6.
  • a heating device 7, which is only shown schematically in FIG. 1, is used, which serves to heat the outer layer 5 in a manner to be described below and thereby to cause this outer layer 5 together with the cover layer 6 to be detached from the base layer 4.
  • an inductively operating heating device 7 which corresponds in structure and mode of operation to devices for inductive heat treatment known from other fields of application.
  • the induction heating device 7 has an annular inductor (heating loop) 8, which consists of a water-cooled tube made of copper or another suitable metallic material, which runs at a short distance from the surface C of the gravure cylinder 1 around the latter.
  • the inductor 8 can also have the shape of a ring segment.
  • the inductor 8 is displaceable in the direction of arrow B along the cylinder surface C.
  • a cooling or Quenching unit 9 Adjacent to the inductor 8 and viewed in its direction of movement B behind the inductor 8 is a cooling or Quenching unit 9 is provided, which is also ring-shaped in the exemplary embodiment shown and moves with the inductor 8.
  • Outlet nozzles 10 for a cooling or quenching medium for example water
  • the liquid jets emerging from the nozzles 10 are designated.
  • the current flowing in the inductor 8 generates eddy currents in a known manner in the outer layer 5 and optionally also in the base layer 4 and in the cover layer 6 in the area of the inductor 8.
  • the latter cause the outer layer 5 and possibly also the base layer 4 and the cover layer 6 to heat up.
  • the material of the outer layer 5, ie the zinc or the zinc alloy is thereby changed in its internal structure, ie the outer layer 5 becomes soft. Because of the lower melting point of zinc compared to the melting point of copper, this softening of the outer layer 5 takes place at temperatures at which no softening takes place in the base layer 4.
  • the softened outer layer 5 is then cooled or quenched by means of the cooling unit 9.
  • the inductor 8 together with the cooling unit 9 is moved along the surface C of the gravure cylinder 1 during the treatment process
  • the induction heating device 7 operates in the medium frequency and / or high frequency range. That the inductor 8 is fed with alternating current at a frequency which is between approximately 500 Hz and 30 kHz (medium frequency range) or above 30 kHz and up to 1000 kHz (high frequency range).
  • outer layers 5 made of zinc or a zinc alloy with a thickness of 0.08 to 0.1 mm of base layers 4 made of copper with a thickness of 0.1 to 2 mm can be detached.
  • the thickness of the cover layer 6 made of chrome is between 0.006 and 0.008 mm.
  • the method according to the invention described also has success with printing forms in which the individual layers have thicknesses other than those specified.
  • the outer layer 5 can also be heated in a manner other than by means of an induction heating device, e.g. similar to the
  • the method according to the invention can also be used to treat printing forms other than gravure cylinders, e.g. for printing plates.
  • the inductor 8 must have a shape which deviates from a ring shape and which is adapted to the surface of the printing form.
  • the cooling unit 9 must also be adapted to the outer shape of the printing form to be treated.
  • Surface or line inductors can be used not only with flat printing forms, but also with cylindrical printing forms.
  • the method according to the invention described can be used not only as shown in FIGS. 1 and 2 for printing cylinders with bearing axles, but also for hollow cylinders without bearing axles.
  • the outer layer 5 directly on the base body 2, the outer layer then as a base layer serves, is applied.
  • the base layer 4 is omitted.

Landscapes

  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Printing Plates And Materials Therefor (AREA)

Abstract

Pour enlever la couche externe (5) métallique dotée de godets d'un cylindre d'impression en héliogravure (1) de la couche de base (4) sous-jacente, la couche externe (5) est chauffée puis refroidie. Ainsi, la couche externe (5) recouverte d'une couche de recouvrement (6) en matière résistante à l'usure, se détache de la couche de base. Les parties détachées de la couche externe (5) se présentent sous une forme solide et peuvent être évacuées sans problème.
PCT/CH1999/000147 1998-06-08 1999-04-13 Procede et dispositif de traitement d'un imprime destines a l'industrie graphique WO1999064250A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH123898 1998-06-08
CH1238/98 1998-06-08

Publications (1)

Publication Number Publication Date
WO1999064250A1 true WO1999064250A1 (fr) 1999-12-16

Family

ID=4205711

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH1999/000147 WO1999064250A1 (fr) 1998-06-08 1999-04-13 Procede et dispositif de traitement d'un imprime destines a l'industrie graphique

Country Status (1)

Country Link
WO (1) WO1999064250A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1295057C (zh) * 2003-07-25 2007-01-17 鲍勃斯脱股份有限公司 卡盘的压花板环的固定方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR735196A (fr) * 1931-04-25 1932-11-04 Langbein Pfanhauser Werke Ag Procédé de fabrication de cylindres ou rouleaux pour la gravure en taille-douce
GB782767A (en) * 1955-06-24 1957-09-11 George Edmond Brackenbury Abel Improvements in the preparation of printing-sleeves by electro-deposition
US3854184A (en) * 1973-09-25 1974-12-17 Mosstype Corp Demountable printing cylinders
EP0009360A1 (fr) * 1978-09-13 1980-04-02 Drg (Uk) Limited Fabrication de douilles pour l'impression
JPS5718256A (en) * 1980-07-09 1982-01-30 Dainippon Printing Co Ltd Method of attaching or detaching sleeve plate for gravure printing
US4408382A (en) * 1981-12-21 1983-10-11 Westinghouse Electric Corp. Method for removing and replacing shrunk-on sleeves on a shaft
EP0473973A1 (fr) * 1990-09-04 1992-03-11 MDC Max Dätwyler Bleienbach AG Procédé pour le traitement de plaques d'impression intaglio

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR735196A (fr) * 1931-04-25 1932-11-04 Langbein Pfanhauser Werke Ag Procédé de fabrication de cylindres ou rouleaux pour la gravure en taille-douce
GB782767A (en) * 1955-06-24 1957-09-11 George Edmond Brackenbury Abel Improvements in the preparation of printing-sleeves by electro-deposition
US3854184A (en) * 1973-09-25 1974-12-17 Mosstype Corp Demountable printing cylinders
EP0009360A1 (fr) * 1978-09-13 1980-04-02 Drg (Uk) Limited Fabrication de douilles pour l'impression
JPS5718256A (en) * 1980-07-09 1982-01-30 Dainippon Printing Co Ltd Method of attaching or detaching sleeve plate for gravure printing
US4408382A (en) * 1981-12-21 1983-10-11 Westinghouse Electric Corp. Method for removing and replacing shrunk-on sleeves on a shaft
EP0473973A1 (fr) * 1990-09-04 1992-03-11 MDC Max Dätwyler Bleienbach AG Procédé pour le traitement de plaques d'impression intaglio

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 006, no. 080 (M - 129) 19 May 1982 (1982-05-19) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1295057C (zh) * 2003-07-25 2007-01-17 鲍勃斯脱股份有限公司 卡盘的压花板环的固定方法

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