WO2009118833A1 - 二材成形用射出成形機及びその制御方法 - Google Patents
二材成形用射出成形機及びその制御方法 Download PDFInfo
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- WO2009118833A1 WO2009118833A1 PCT/JP2008/055596 JP2008055596W WO2009118833A1 WO 2009118833 A1 WO2009118833 A1 WO 2009118833A1 JP 2008055596 W JP2008055596 W JP 2008055596W WO 2009118833 A1 WO2009118833 A1 WO 2009118833A1
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- Prior art keywords
- die plate
- movable
- mold
- rotary
- electric motor
- Prior art date
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 78
- 238000000465 moulding Methods 0.000 title claims abstract description 55
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- 238000002347 injection Methods 0.000 claims abstract description 52
- 239000007924 injection Substances 0.000 claims abstract description 52
- 239000000463 material Substances 0.000 claims abstract description 52
- 239000011347 resin Substances 0.000 claims abstract description 27
- 229920005989 resin Polymers 0.000 claims abstract description 27
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1615—The materials being injected at different moulding stations
- B29C45/1628—The materials being injected at different moulding stations using a mould carrier rotatable about an axis perpendicular to the opening and closing axis of the moulding stations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/64—Mould opening, closing or clamping devices
- B29C45/68—Mould opening, closing or clamping devices hydro-mechanical
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/80—Measuring, controlling or regulating of relative position of mould parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C2045/1784—Component parts, details or accessories not otherwise provided for; Auxiliary operations not otherwise provided for
- B29C2045/1792—Machine parts driven by an electric motor, e.g. electric servomotor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76177—Location of measurement
- B29C2945/76314—Auxiliary devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76595—Velocity
- B29C2945/76598—Velocity linear movement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76595—Velocity
- B29C2945/76605—Velocity rotational movement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76822—Phase or stage of control
- B29C2945/76866—Mould closing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76929—Controlling method
- B29C2945/76936—The operating conditions are corrected in the next phase or cycle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/03—Injection moulding apparatus
- B29C45/04—Injection moulding apparatus using movable moulds or mould halves
- B29C45/0441—Injection moulding apparatus using movable moulds or mould halves involving a rotational movement
- B29C45/045—Injection moulding apparatus using movable moulds or mould halves involving a rotational movement mounted on the circumference of a rotating support having a rotating axis perpendicular to the mould opening, closing or clamping direction
Definitions
- each of the two cavities formed by the mold of the movable die plate, the mold of the fixed die plate, and the molds of both sides of the rotary die plate installed between both die plates The present invention relates to a two-component injection molding machine in which different types of resin are injected from a set of injection units, a rotary die plate is rotated 180 degrees, two-layer injection is performed, and two members are integrally molded.
- a movable die plate and a rotary die plate The present invention relates to a two-material molding injection molding machine provided with moving means whose control of moving speed is easy to control, and rotating means whose control of rotational speed of the rotary die plate is easy, and control method of moving speed and rotational speed.
- One example of a molding method to obtain molded articles of different materials and different colors by an injection molding machine one resin material is injection molded in a mold on the primary side, and the primary molded article is put in the mold on the secondary side, The other resin material is injection-molded in the gap between the mold cavity on the secondary side and the primary molded product, and there have been proposed various injection molding apparatuses for two-material molding (see Patent Documents 1 and 2).
- Patent Document 1 The conventional example shown in Patent Document 1 for such a molding apparatus will be described.
- the two side faces of the rotary plate installed between the mold of the movable plate and the die of the fixed plate and the double plate from two sets of injection units
- One resin material is injection-molded on the primary side of the two cavities formed by the molds of the mold, the rotating disk is rotated 180 degrees, the other resin material is injected on the secondary-side cavity, and the two materials are integrally molded.
- the movement of the rotary disk is an inherent hydraulic cylinder
- the movable disk is opened and closed by the movable disk, the rotary disk, the ram of the end portion of the tie bar provided through the fixed disk and the fixed disk
- the cylinder is fixed by a hydraulic cylinder which is fixed to the cylinder, and the rotation of the rotary disk is performed by a rotation drive means which is not specified.
- the clamping cylinder consisting of a large diameter hydraulic cylinder built in the stationary platen and a ram that can slide in the cylinder is used.
- the large diameter ram has a tie bar and a detachable function.
- the molding action of this injection molding machine is such that the rotary disk is pulled toward the fixed disk by the unique hydraulic cylinder, and the movable disk is moved to the fixed disk by the hydraulic cylinder provided between the end of the tie bar and the fixed disk. Then, move the movable plate and the rotary plate together by the above-mentioned mold clamping cylinder to pressurize the working oil, inject one resin material from one injection unit to the cavity on the primary side, and reverse the rotary plate 180 degrees. The movable plate and the rotary plate are tightened again, and the other resin material is injected from the other injection unit into the cavity on the secondary side to integrally mold the two materials.
- the multi-material injection molding machine of the conventional example shown in Patent Document 2 is a multi-material molding using a mold of a fixed mold, a movable mold, and a rotating mold located between the fixed mold and the movable mold and rotating.
- a first injection device for injecting a molten material into the fixed mold a second injection device for injecting the molten material into the movable mold, and the movable mold side capable of pivoting the rotation type.
- a compression type clamping means for clamping the movable type and the stationary type with the rotational type interposed therebetween.
- the molding action of this injection molding machine is almost the same as the injection molding machine of Patent Document 1.
- the drive means for moving the mold is a drive means using a hydraulic cylinder as in the conventional example of Patent Document 1, and instead of the hydraulic drive, a straight line by a servomotor and a ball screw
- moving means and rotating means can also be used, they are hydraulically driven in the description of the embodiment.
- the pivoting type is supported by the member extended from the fixed board so as to be pivotable and movable to the movable side, since it is a structure that can not obtain sufficient rigidity because it is a cantilever member, weight It is difficult to support with high accuracy without deflection of a large rotation type.
- the present invention addresses the above problems by means of a standard mold-replaceable rotary mold, and a mold drive means capable of operating with high accuracy and stability even with high speed operation of mold opening and closing of movable and rotating discs. Intended to provide.
- the movable die plate to which the movable side mold is attached and the fixed die plate to which the fixed side mold is attached are movable in the same direction as the movable die plate.
- the clamping means is a hydraulic clamping means for clamping three sets of die plates simultaneously.
- the moving die plate opening and closing means is a movable die plate opening and closing means driven by an electric motor
- the rotating die plate opening and closing means is a rotating die plate opening and closing means driven by an electric motor
- the rotating means of the rotating die plate is a reversing stand
- a two-material injection molding machine characterized in that it is a rotational drive means driven by an attached electric motor.
- the hydraulic clamping means can be coupled to the plurality of hydraulic cylinder devices incorporated in the fixed die plate and the ram of the cylinder device and can pierce the rotary die plate and the movable die plate
- a hydraulic clamping system comprising a plurality of tip grooved tie bars provided in such a manner and a split nut provided on the outside of the movable die plate and engageable with the grooves of the tie bars to simultaneously clamp three sets of die plates.
- the movable die plate opening and closing means is a movable die plate opening and closing means by a ball screw nut driven by an electric motor and a ball screw nut screwed with the ball screw shaft attached to the movable die plate.
- the plate opening and closing means comprises a ball screw shaft driven by an electric motor and a ball screwed in engagement with the ball screw shaft attached to the reversing base.
- the rotary die plate opening and closing means by the nut, and the rotation means of the rotary die plate is a horizontal large gear provided on a rotary die plate rotatably installed 180 degrees back and forth on the vertical central axis of the reversing base.
- the present invention is a two-component injection molding machine characterized in that it is a rotational drive means driven by a small gear provided on the output shaft of an electric motor installed in the above.
- the movable die plate opening / closing means is a ball screw shaft driven by an electric motor fixed to a fixed die plate or a base, and the ball screw attached to the movable die plate
- a two-component injection molding machine characterized by comprising a ball screw nut engaged with a shaft.
- the movable die plate opening / closing means is driven by an electric motor fixed to the reversing table, and the support table fixed to the reversing table is rotatably pivoted via a ball bearing.
- a two-component injection molding machine comprising a ball screw shaft supported in a restricted direction and a ball screw nut screwed to the ball screw shaft fixed to a movable die plate.
- the means for rotating the rotary die plate is toothed with a horizontal large gear attached to the rotary die plate rotatably installed 180 degrees around the vertical central axis of the reversing table.
- a two-component injection molding machine is characterized in that it is driven by an electric motor installed on a reversing table via a belt or chain and a small gear.
- the rotation means of the rotary die plate is directly connected and driven by an electric motor mounted on the reversing table and rotating the rotary die plate by 180 degrees, and the injection molding for two-material molding is characterized. It is in the plane.
- one of the two sets of injection units is installed on the fixed die plate side and used for resin injection to the fixed mold, and the other one is a movable die plate
- It is an injection molding machine for two-component molding, characterized in that it is installed on the side and used for resin injection to the movable mold, and moves with movement of the movable die plate in operation.
- the reversing table is provided with a positioning pin against which the rotating die plate rotating on the reversing table abuts at its rotation limit, and the position where the rotating die plate has reached one rotation limit
- the present invention provides a two-component injection molding machine characterized in that a positioning pin is projected so as to face the opposing die plate at the position of the return rotation limit.
- the hydraulically driven mold clamping device for simultaneously clamping three sets of die plates, and the electric motor driven movable die plate open / close device for advancing and retracting the movable die plate with respect to the fixed die plate.
- An electric motor driven rotary die plate opening and closing device for operating the rotary die plate and the reversing base in the same direction as the movable die plate, an electric motor driven reversing base rotating device for rotating the reversing base in the horizontal direction;
- a control device capable of feedback controlling each of motor operation control.
- a hydraulically driven mold clamping device for simultaneously clamping three sets of die plates, and an electric motor driven movable die plate opening and closing device for advancing and retracting the movable die plate with respect to the fixed die plate.
- An electric motor driven rotary die plate opening and closing device for operating the rotary die plate and the reversing base in the same direction as the movable die plate, an electric motor driven reversing base rotating device for rotating the reversing base in the horizontal direction;
- a control device capable of feedback controlling each of motor operation control, wherein at least one of the electric motors is a servomotor.
- a hydraulically driven mold clamping device for simultaneously clamping three sets of die plates, and an electric motor driven movable die plate opening and closing device for advancing and retracting the movable die plate with respect to the fixed die plate.
- An electric motor driven rotary die plate opening and closing device for operating the rotary die plate and the reversing base in the same direction as the movable die plate, an electric motor driven reversing base rotating device for rotating the reversing base in the horizontal direction;
- the motor operation control is provided with a control device capable of feedback control respectively, and at the time of speed control in the feedback control, the speed control during acceleration or deceleration is acceleration or deceleration according to a linear line with a constant gradient value.
- Speed control during acceleration from constant speed, or during deceleration from constant speed and acceleration, or each linear linear speed of constant speed and deceleration Each with a two-material molding injection molding machine, characterized in that the speed control in accordance with a quadratic curve as a tangent.
- a hydraulically driven mold clamping device for simultaneously clamping three sets of die plates, and an electric motor driven movable die plate opening and closing device for advancing and retracting the movable die plate with respect to the fixed die plate.
- a two-component injection molding machine characterized in that a positioning pin can be inserted into a pin insertion hole.
- the hydraulically driven mold clamping device for simultaneously clamping three sets of die plates
- the electric motor driven movable die plate opening / closing device for advancing and retracting the movable die plate with respect to the fixed die plate
- Two members characterized by comprising a control device capable of controlling to start the insertion operation of the positioning pin at a predetermined position in the rotation direction of the reversing table during the rotation of the reversing table, which is in the near side of the center of the pin. It is in a molding injection molding machine.
- a fourteenth invention is the injection molding machine according to the first invention, wherein the reinforcing rib thickness of the rotary die plate gradually decreases outward from the center of the rotary die plate. is there.
- the rotary die plate is provided with a drive device for in-mold movable member operation such as extrusion of molded product in the mold, movable nest operation, gate valve operation, etc. It is in the two-component molding injection molding machine.
- the rotary die plate is provided with a driving device for the in-mold movable member operation such as a molded product extruding operation in the mold, a movable nesting operation, and a gate valve operation
- a driving device for the in-mold movable member operation such as a molded product extruding operation in the mold, a movable nesting operation, and a gate valve operation
- a two-component injection molding machine is provided with a communication device capable of wirelessly transmitting and receiving control signals during operation control of the product ejection device.
- one of the two sets of injection units is movably installed on the fixed die plate side relative to the fixed die plate, and the other set is a possible die plate side On the slide base fixed to the movable die plate, and at the time of mold opening and closing of the movable die plate, the other set of injection units are attached to the movable die plate
- An eighteenth invention uses the injection molding machine for two-material molding described in any one of the first to seventeenths, and closes a mold of a movable die plate and a rotary die plate loading / reversing table, clamps it, and injects and fills molten resin.
- the control method of the injection molding machine for two-material molding is characterized in that acceleration, speed maintenance, and deceleration are controlled by an electric motor so that mold opening and closing movement time of the plate and the rotary die plate loading and inverting stand becomes shortest.
- the nineteenth invention uses the injection molding machine for two-component molding described in any one of the first to seventeenths, so as to achieve the shortest rotation time when rotating a rotary die plate on a reversing table by 180 degrees.
- the present invention is a control method of a two-material injection molding machine characterized by controlling rotation acceleration, rotation speed maintenance and rotation deceleration by an electric motor.
- the movable die plate in motion or the distance required for the rotary die plate to stop is a collision prevention distance
- the movable die plate, the mold, the rotary die plate and the gold To monitor the moving tip position of each die and to automatically decelerate or stop the approaching die plate during movement when the relative position of the moving tip of both die plates or the respective molds enters the collision prevention distance
- a control method of the injection molding machine for two-material molding characterized in that a collision between the movable die plate and the rotary die plate during opening and closing movement is prevented.
- the movable die plate in motion or the distance required for the rotary die plate to stop is a collision prevention distance
- the movable die plate, the mold, the rotary die plate and the gold To monitor the moving tip position of each die and to automatically decelerate or stop the approaching die plate during movement when the relative position of the moving tip of both die plates or the respective molds enters the collision prevention distance
- a control method of an injection molding machine for two-component molding characterized in that the rotation of the roller is reduced or stopped.
- the speed accuracy and position accuracy of the movable die plate and the rotary die plate can be improved by motorizing the mold opening and closing, collisions can be avoided even at high speed operation, and breakage of the mold due to impact can be prevented. it can.
- dedicated moving means ball screw shaft, ball screw nut, servo motor etc.
- dedicated moving means ball screw shaft, ball screw nut, servo motor etc.
- simultaneous movement of the movable die plate and the rotary die plate is possible. Since it is possible to control the mold opening and closing with high accuracy while linking with the molded product extraction device in consideration of the relative position of the movable die plate and the rotary die plate, it is effective for shortening the molding cycle, Since the reproducibility of the position of the mold is good, it is possible to avoid a chucking error at the time of taking out the molded product.
- the speeding up of the reversing and the shortening of the mold opening and closing time for the reversing can shorten the time for which the molded article is exposed to the air, and can suppress the inconvenience associated with the temperature decrease of the molded article.
- the time for which the molded product is exposed to the air is practically The time may be about 40 seconds to 50 seconds, preferably 30 seconds or less. More preferably, it may be 20 seconds or less.
- the high precision control of the rotation stop position has the effect of making the fitting with the positioning pin easy and reliable, and by making the operation of most of the die plates electrically driven, the cleanness of the forming apparatus is improved.
- FIG. 1 is a schematic plan view of a two-material injection molding machine according to a first embodiment of the present invention.
- FIG. 2 is a view showing a rotation operation of a rotary die plate of the two-material molding injection molding machine of FIG.
- FIG. 3 is a side view of the two-component injection molding machine of FIG.
- FIG. 4 is a side view in the direction of arrows XX showing a schematic configuration of the rotary die plate of FIG.
- FIG. 5 is a two-material molding process diagram by the two-material molding injection molding machine of the present invention.
- FIG. 6 is a view for explaining a collision preventing method at the time of opening and closing of the die plate of the two-material molding injection molding machine according to the first embodiment of the present invention.
- FIG. 1 is a schematic plan view of a two-material injection molding machine according to a first embodiment of the present invention.
- FIG. 2 is a view showing a rotation operation of a rotary die plate of the two-material molding injection molding machine
- FIG. 7 is a schematic plan view of a two-material injection molding machine according to a second embodiment of the present invention.
- FIG. 8 is a side view showing a schematic configuration of a rotary die plate according to a third embodiment of the present invention.
- FIG. 9 is a side view showing a schematic configuration of a rotary die plate according to a fourth embodiment of the present invention.
- FIG. 10 is an explanatory view of the injection unit B.
- FIG. 11 is a perspective view of a rotary die plate.
- FIG. 12 is a cross-sectional view taken along line AA of FIG.
- This embodiment is different in each of the two cavities formed by the die of the movable die plate, the die of the fixed die plate and the dies of both sides of the rotary die plate installed between both die plates.
- a two-component molding injection molding machine that injects a resin, rotates a rotary die plate 180 degrees, injects double, and integrally molds two materials, including movement of a movable die plate and a rotary die plate, and rotation die
- An electric drive means is provided which is easy to control for rotation drive.
- FIG. 1 is a schematic plan view of a two-material injection molding machine according to the present invention.
- FIG. 2 is a view showing a rotation operation of a rotary die plate of the two-material molding injection molding machine of FIG.
- FIG. 3 is a side view of the two-component injection molding machine of FIG.
- FIG. 4 is a side view in the direction of arrows XX showing a schematic configuration of the rotary die plate of FIG.
- FIG. 5 is a two-material molding process diagram by the two-material molding injection molding machine of the present invention.
- FIG. 6 is a view for explaining a collision preventing method when the die plate of the two-material molding injection molding machine of FIG. 1 is opened and closed.
- reference numeral 1 denotes a base, and at one end of the base 1, a fixed die plate 2 to which a fixed side mold 4 is attached is fixed.
- the plate 3 and the plate 3 are movably mounted.
- the rotary die plate 9 is placed on the reversing table 7, rotated 180 degrees forward and reverse from the determined angular position, and fixed by the positioning pins 44 a of the positioning device 44 and the hydraulic cylinder 48.
- the die plate 2 and the movable die plate 3 are positioned at an angular position facing directly to each other.
- the reversing base 7 on which the movable die plate 3 and the rotating die plate 9 are placed is guided by a guide rail 19 fixed to the base 1 via a linear bearing (not shown) and moved. It is preferable that the movable die plate 3 and the reversing table 7 be guided and moved by the guide rail 19, but in the present invention, for example, even a sliding plate or the like has no practical problem.
- the rotary die plate 9 has a rotary mold A (6A) and a rotary mold B (6B) of the same shape fitted on the movable side mold 5 and the fixed side mold 4 to form a cavity on both sides. There is. From two sets of injection unit A (11) and injection unit B (12) in two cavities formed when the fixed die plate 2, the rotary die plate 9 and the movable die plate 3 are simultaneously clamped by the clamping means Each different resin material is plasticized and injected and filled.
- the injection unit A (11) is installed on the fixed die plate 2 side and is used for resin injection to the cavity formed by the fixed side mold 4 and the rotary mold A (6A) (or the rotary mold B (6B)).
- One injection unit B (12) is installed on the movable die plate 3 side and is formed by the movable side mold 5 and the rotary mold B (6B) (or the rotary mold A (6A)). It is used for resin injection to the cavity, and moves with the opening and closing movement of the movable die plate 3 during its operation. At this time, the injection unit B (12) travels with a large stroke along with the movable die plate 3, but the injection unit B (12) is a sliding base connected and fixed to the movable die plate 3 via the connection fixing member 63.
- reference numeral 62 denotes a nozzle touch cylinder for the injection unit B (12), which enables the sliding of the injection unit B (12) on the slide base 64.
- reference numeral 61 denotes a nozzle touch cylinder for the injection unit A (11).
- the state of the nozzle touch is shown in FIG. As shown in FIG. 10, the nozzle 12a for the injection unit B (12) is in contact with the movable mold 5, and the nozzle is touched at the time of mold opening and closing. Therefore, simultaneously with completion of mold closing and boosting, Resin can be injected from the nozzle, and high cycle can be realized.
- the nozzle 12a does not separate from the movable mold 5 when the mold is opened, it is possible to prevent the resin from drooping from the tip of the nozzle 12a.
- the injection unit B (12) can be operated integrally with the movable plate, it is possible to reduce the shock at the start and stop of the operation and to prevent the collision between the injection unit B (12) and the mold due to the shock. It will be possible to do.
- a pair of movable die plate opening / closing means 14 symmetrically installed on both sides of the two-material molding injection molding machine 10 includes a servomotor A (21) fixed to the base 1 or the fixed die plate 2 and a ball screw axis A (22), a supporting base 26 fixed to the base 1 or the fixed die plate 2 and axially axially restraining the ball screw axis A (22) rotatably freely, and a ball of the ball screw axis A (22)
- the rotational force of the servomotor A (21) is determined by attaching a ball screw nut A (24) screwed to the screw 22a, a nut support 25 fixed to the movable die plate 3 with the ball screw nut A (24) attached and fixed to the movable die plate 3.
- the power transmission mechanism 23 (for example, a gear pulley and a toothed belt, a gear reducer, etc.) for transmitting to the ball screw shaft A (22), the pair of servomotors A (21) are synchronously operated, and the movable die plate 3 is It can be opened and closed moves parallel to the fixed die plate 2.
- a pair of rotary die plate opening / closing means 15 symmetrically installed on both sides of the two-material molding injection molding machine 10 has a servomotor B (31) fixed to the base 1 or the fixed die plate 2 and a ball screw shaft B (32), a supporting base 34 fixed to the base 1 or the fixed die plate 2 and supporting the ball screw shaft B (32) in the axial direction so as to freely freely rotate, and the ball screw shaft B (32)
- a power transmission mechanism 36 for example, a gear pulley and a toothed belt, a gear reducer, etc.
- the pair of servomotors B (31) are synchronized and the reversing table 7 is fixed. Die plate It can be opened and closed moved parallel to.
- the rotary die plate rotating means 16 is a rotary die that engages with the servomotor C (41) attached to the reversing table 7, the pinion 42 attached to the servomotor C (41), and the pinion 42.
- symbol 8 is a lower axis
- the hydraulic cylinder 48 enables the positioning pin 44a to be inserted into the positioning pin insertion hole (not shown) at a position where the rotary die plate 9 rotating on the reversing table 7 faces the opposing die plate. You may do so.
- the insertion operation of the positioning pin 44a is performed at a predetermined position in the rotation direction of the reversing base during the rotation of the reversing base where the center of the positioning pin insertion hole is in front of matching the center of the positioning pin of the positioning pin insertion device.
- a control device capable of starting control may be provided. Thereby, high cycle of molding can be realized.
- the control of part of the position control of the servomotor C (41) is stopped, If the positioning of the reversing table 7 is not performed by the servomotor but by mechanical copying with the positioning pins, the rotational position insensitive area of the reversing table 7 due to the backlash between the pinion 42 and the large gear 43 can be ignored. Hunting during rotation control can be prevented. In this case, it is preferable that the insertion hole of the positioning pin 44a has a slightly tapered shape in which the pin side becomes large.
- the hydraulic clamping means is connected to the four hydraulic cylinders 2a incorporated in the fixed die plate 2 and the ram 18b of the cylinder 2a, as shown in FIG. 1, and provided to pierce the movable die plate 3.
- 3 sets of die plates 2 comprising a tie bar 18 with a ring groove 18a at each end and 4 sets of split nuts 17 provided on the outside of the movable die plate 3 and engageable with the ring groove 18a of the tie bar 18 , 9 and 3 simultaneously.
- the resin A melted from the injection unit A (11) is injected and filled into a cavity formed by the side mold 4 and the state is maintained for a fixed time and cooled, and the time for the resin A to solidify is observed, the movable die plate 3 and the reversing table 7 on which the rotary die plate 9 is loaded are opened and the gaps between the die plates 2, 9 and 3 are sufficiently opened, and after the rotary die plate 9 is rotated 180 degrees, the movable die plate 3 and the rotary die plate 9 are rotated. The die plate 9 is remolded and closed.
- the resin A melted from the injection unit A (11) is injected into the cavity formed by the rotary mold B (6B) and the fixed side mold 4 after clamping by the hydraulic cylinder 2a.
- the resin B melted from the injection unit B (12) is injected and filled into the cavity formed by the molded product stuck to the rotary mold A (6A) and the movable side mold 5, and the two materials
- the two-piece molded product which has been overlapped is molded, and the state is maintained for a fixed time, and cooled, and the time for the resin A and B to solidify is reversed, and the reversing table 7 on which the movable die plate 3 and the rotary die plate 9 are mounted
- the mold is moved to open the gap between the die plates 2, 9 and 3 sufficiently, and after taking out the two-component molded product stuck to the movable side mold 5 out of the machine, the rotary die plate 9 is 180 degrees.
- the mold closing and molding processes of the movable die plate 3, the rotary die plate 9 and the fixed die plate 2 after this time point are the repetition of the molding process after the above-described mold reclosing.
- the injection and filling operations of the injection unit A (11) and the injection unit B (12) are simultaneously performed, but in the mold 4 and the mold 5, respectively different molding, for example, injection compression molding or foaming
- the injection and filling operations of the injection unit A (11) and the injection unit B (12) may be performed sequentially.
- the die plate on which the mold is mounted is heavy, and the choice of moving speed and acceleration must be carefully selected.
- the weight of the rotary mold is 18 tons (9 tons / 1 unit ⁇ 2 units), and for rotating the mold Since the weight of the rotary die plate 9 is 20 tons, if a high moving speed is selected, the required acceleration power becomes large, or the acceleration takes time, and the driving means is heavily burdened. In addition, rapid acceleration and deceleration cause vibration.
- hydraulic drive means are suitable for large driving forces, this means that when moving heavy goods it is difficult and time-consuming to control the position accurately.
- Servomotor and ball screw drive means are used for moving means of movable die plate 3 and rotary die plate 9 of two-material molding injection molding machine 10, and acceleration (deceleration) operates smoothly in a control device (not shown)
- Program to a profile for example, Sin curve
- settable input can be adjusted so that the mold opening and closing movement time of the reversing table 7 loaded with the movable die plate 3 and the rotating die plate 9 can be moved at the shortest speed.
- the speed and position control program may be created to control the servomotor. By using a servomotor, highly accurate operation can be realized.
- a control device capable of feedback control of each electric motor operation control may be provided to perform feedback control. This makes it possible to speed up the cycle in two-material molding and to realize an operation with high accuracy.
- speed control in feedback control in speed control during acceleration or deceleration, acceleration or deceleration is performed according to a linear line with a constant gradient value, and speed control during acceleration from deceleration or during deceleration Smooth control can be realized by performing speed control according to a quadratic curve in which each linear linear speed of constant speed and acceleration or constant speed and deceleration is tangent.
- the rotational acceleration and the rotational speed can be adjusted by a control device (not shown) so as to achieve the shortest rotation time when rotating the rotary die plate 9 on the reversing table 7 by 180 degrees.
- a control device not shown
- make a program of rotational speed control so that setting can be input to, and control the servo motor.
- the thickness of the reinforcing rib 9a of the rotary die plate 9 is gradually reduced from the center to the outer side of the rotary die plate so as to reduce its weight. It is also good. As a result, it is possible to reduce the rotational inertia associated with the reduction of the weight on the far side from the rotational center, and as a result, it is possible to realize energy saving, high responsiveness, and control with high accuracy.
- the mold release operation is performed by providing a drive device for the movable member operation in the mold, such as the extrusion of the molded product in the mold, the movable nesting operation, and the gate valve operation, in the rotary die plate 9. It is also good. As a result, it is possible to eliminate the need for a molded product protruding device for protruding the molded product on the mold side, and the structure of the mold can be simplified. As a result, since the drive device for the movable member operation in the mold can be shared by different molds, it is possible to reduce the cost of manufacturing the mold which is different for each molded product and is required for each molded product.
- a communication apparatus which can transmit / receive a control signal by radio may be provided, and reduction of weight by simplification of wiring and reduction of a wiring member may be aimed at.
- the communication wiring does not have to have a sliding specification for the wired case, and the wiring can be simplified.
- the weight of the rotary die plate can be reduced.
- the collision preventing method between die plates is the distance required for the movable die plate 3 or the reversing base 7 on which the rotating die plate 9 is placed to stop to be the collision preventing distance e (not shown in the figure).
- the positions of the fixed die plate 2, the movable die plate 3 and the rotary die plate 9 are monitored, and when the relative position of each other is within the collision prevention distance e, the direction approaching automatically is decelerated or stopped to move the movable die plate 3 And prevent collision during opening and closing movement of the rotary die plate 9.
- the behavior of the movable die plate 3 and the movable die plate 9 during rotation of the movable die plate 9 and the rotation of the rotary die plate 9 and an example of collision prevention control will be described with reference to FIG.
- the angle of the rotary die plate 9 that draws a rotary trajectory at a distance r2 that is most distant from the rotary shaft to the fixed die plate 2 in the direction perpendicular to the rotary shaft or the angle c2 of the rotary mold A (6A) From the axis of rotation of the rotary die plate 9 to the corner c1 of the rotary die plate 9 or the corner c1 of the rotary die B (6B), which draws a rotary trajectory at a distance r1 farthest to the movable die plate 3 in the
- the distance from the rotational axis of the rotary die plate (9) to c1 is L1.
- FIG. 6 shows the case of the corner c2 of the rotary mold A (6A) and the corner c1 of the rotary mold B (6B).
- L1 and L2 are fluctuation numbers uniquely determined from the rotation angle of the rotary die plate 9 and the values of r1 and r2.
- L1 L2.
- the thickness of the fixed mold 4 is a
- the distance from the mold mounting surface of the fixed die plate 2 to the rotation axis of the rotary die plate 9 is b2
- the mold mounting surface of the fixed die plate 2 to the movable mold 5 Let the distance to the end face be b1.
- b1 and b2 are variable numbers.
- the rotary die plate 9 is fixed to the rotary die plate 9 when rotating.
- the distance between the die plate 2 and the rotary die plate 9 and the movable die plate 3 is calculated from the position of the movable die plate and the position of the rotary die plate and the rotation angle, and when entering the collision prevention distance e
- the movable die plate 3 and the rotary die plate 9 may be stopped to prevent the collision when the rotary die plate 9 is rotated.
- the spacing can be reduced to further shorten the moving time of each die plate.
- the second embodiment is different from the first embodiment in the movable die for driving the movable die plate 3 as shown in the schematic plan view of the two-material molding injection molding machine 30 shown in FIG.
- the servomotor A (21) of the plate opening / closing means 46 and the support 26 of the ball screw shaft 47 are installed on the reversing base 7.
- the other configuration is the same as that of the first embodiment. I will omit the explanation.
- the advantage of the second embodiment is that since the ball screw shaft 47 can be shortened, the critical speed of the ball screw shaft 4 can be improved, and the opening and closing speed of the movable die plate 3 can be increased.
- the rotary die plate 9 and the movable die plate 3 are directly connected by the ball screw, the rotary die plate 9 is used when detecting and controlling the equivalent distance between the rotary die plate 9 and the movable plate 3 at the time of mold opening and closing. The calculation of the relative position of the movable die plate 3 is unnecessary, and the control can be facilitated.
- the third embodiment is different from the first embodiment in that, as shown in the schematic side view of the rotary die plate in FIG. Servomotor C (41), small gear 53 attached to servomotor C (41), large gear 52 integrally provided on rotary die plate 9 meshing with small gear 53, small gear 53, and large gear 52 And an endless toothed belt 54 wound therearound, and is a rotational drive means for rotating the rotary die plate 9 a half turn in the forward and reverse directions, and other than this, it is the same as the first embodiment. Therefore, the explanation of the other configuration is omitted.
- the gear shape can be selected without being restricted by the distance between the axes.
- the fourth embodiment is different from the first and second embodiments in that, as shown in the schematic side view of the rotary die plate in FIG. 9, the rotary die plate rotating means 60 is for power transmission.
- the servomotor D (56) attached to the reversing stand 7 is directly connected to the rotating shaft 57 of the stand 55 integral with the rotating die plate 9, without using gears or endless belts. is there.
- the other configuration is the same as that of the first embodiment, and thus the description of the other configuration is omitted.
- the injection for two-piece molding provided with the moving means in which the moving speed of the movable die plate and the rotating die plate can be easily controlled and the rotating means in which the rotational speed of the rotary die plate is easily controlled.
- a molding machine can be provided.
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Abstract
Description
この射出成形機による成形作用は、特許文献1の射出成形機と殆ど同じである。
3 可動ダイプレート
4 固定側金型
5 可動側金型
6A 回転金型A
6B 回転金型B
7 反転台
9 回転ダイプレート
10、30 二材成形用射出成形機
11 射出ユニットA
12 射出ユニットB
14、46 可動ダイプレート開閉手段
15 回転ダイプレート開閉手段
16、50、60 回転ダイプレート回転手段
17 割りナット
18 タイバー
21 サーボモータA
22a、32a、47a ボールねじ
24、33 ボールねじナット
31 サーボモータB
41 サーボモータC
56 サーボモータD
この実施の形態は、可動ダイプレートの金型と固定ダイプレートの金型と両ダイプレートの間に設置された回転ダイプレートの両側面の金型とで形成する2つのキャビティのそれぞれに異種の樹脂を射出し、回転ダイプレートを180度回転して2重射出し2材を一体成形する二材成形用射出成形機であって、可動ダイプレートと回転ダイプレートの移動と、回転ダイプレートの回転の駆動に制御が容易な電動駆動手段を設けたものである。
図1は本発明に係わる二材成形用射出成形機の平面模式図である。図2は、図1の二材成形用射出成形機の回転ダイプレートの回転動作を示す図である。図3は図1の二材成形用射出成形機の側面図である。図4は、図1の回転ダイプレートの概略構成を示すX-X矢視側面図である。図5は本発明の二材成形用射出成形機による二材成形工程図である。図6は、図1の二材成形用射出成形機のダイプレート開閉時の衝突防止方法を説明する図である。
そして、図4に示すように、回転ダイプレート9は反転台7上に載せられ、決められた角度位置から180度正逆回転し、位置決め装置44の位置決めピン44aと油圧シリンダ48とにより、固定ダイプレート2、可動ダイプレート3に正対した角度位置で位置決めされる。
可動ダイプレート3と回転ダイプレート9とが載っている反転台7は、基台1上を図示しないリニアベアリングを介して基台1に固設されたガイドレール19にガイドされて移動する。
なお、可動ダイプレート3と反転台7とがガイドされ移動するのはガイドレール19が好ましいが、本発明においては、例えば摺動板等であっても何ら実用上の支障は無い。
この時、射出ユニットB(12)は、可動ダイプレート3とともに大ストローク移動するが、射出ユニットB(12)は連結固定部材63を介して、可動ダイプレート3に連結固定された摺動式基台64の上に載置されているので、摺動式基台64がガイドレール19にガイドされて移動することにより、可動ダイプレート3の動作に遅れることなく、追従、移動できるようになっている。
また、図3中、符号62は、射出ユニットB(12)用のノズルタッチシリンダで、射出ユニットB(12)の摺動式基台64上での摺動を可能にしている。一方、図3中、符号61は、射出ユニットA(11)用のノズルタッチシリンダを示す。
図10に示すように、射出ユニットB(12)用のノズル12aが可動側金型5に接しており、型開閉時においてノズルタッチした状態であるので、型の閉じ、昇圧の完了と同時に、ノズルから樹脂を射出することができ、ハイサイクル化が可能となる。
二材成形用射出成形機10の両側に対称に一対設置される可動ダイプレート開閉手段14は、基台1又は固定ダイプレート2に固設されたサーボモータA(21)と、ボールねじ軸A(22)と、基台1又は固定ダイプレート2に固設され且つボールねじ軸A(22)を回転自在に軸方向を拘束して支える支え台26と、ボールねじ軸A(22)のボールねじ22aと螺合するボールねじナットA(24)と、ボールねじナットA(24)を取付け且つ可動ダイプレート3に固設されたナット支持台25と、サーボモータA(21)の回転力をボールねじ軸A(22)に伝える動力伝達機構23(例えば歯車プーリーと歯付きベルト、歯車減速機等)とにより構成され、一対のサーボモータA(21)は同調運転され、可動ダイプレート3は固定ダイプレート2に平行に開閉移動することができる。
これにより、高い精度での位置決めを実現することができる。
これにより、成形のハイサイクル化を実現することができる。
また、反転台7の回転動作を駆動しているサーボモータC(41)の制御において、位置決めピン44aを挿入する際に、サーボモータC(41)の位置制御の一部の制御を止めて、反転台7の位置決めをサーボモータで行うのでなく、位置決めピンによる機械的な倣いによって行えば、ピニオン42と大歯車43とのバックラッシに起因した反転台7の回転位置不感領域を無視でき、微低速回転制御時のハンチングを防止できる。この場合、位置決めピン44aの挿入穴はピン側が大となる若干のテーパ形状とすることが好ましい。
図5に示すように、回転ダイプレート9と可動ダイプレート3とを固定ダイプレート2に型閉する最初の型閉後、油圧シリンダ2aによる型締めを行い、回転金型A(6A)と固定側金型4とで形成するキャビテイに射出ユニットA(11)から溶融した樹脂Aを射出充填し、その状態を一定時間保持して冷却し、樹脂Aが固化する時間を見計らって、可動ダイプレート3と回転ダイプレート9を積載する反転台7を型開移動して各ダイプレート2、9、3の間隔を充分に開き、回転ダイプレート9を180度回転した後、可動ダイプレート3と回転ダイプレート9とを再型閉する。
この時点以降の可動ダイプレート3と回転ダイプレート9と固定ダイプレート2の型閉、成形工程は上記の再型閉後の成形工程の繰り返しとなる。
図5では、射出ユニットA(11)と射出ユニットB(12)との射出充填動作を同時に行っているが、金型4と金型5とにおいて、それぞれ別の成形、例えば射出圧縮成形や発泡成形、ガスアシスト成形、インサート成形等を行う場合には、射出ユニットA(11)と射出ユニットB(12)との射出充填動作は、シーケンシャルに行っても良い。
例えば成型品(寸法1550mm×1200mmの二材成型品)を成形する金型として、回転金型の重量は18トン(9トン/1台×2台)であり、この金型を回転させるための回転ダイプレート9の重量は20トンであるので、速い移動速度を選択すると必要加速動力が大きくなり、或いは加速に時間がかかり、駆動手段に大きな負担がかかる。また、急激な加速、減速は、振動の要因となる。
大きい駆動力に対しては油圧駆動手段が適しているが、この手段は重量物を移動するとき、位置を正確に制御するのが難しく時間がかかる。最近は精密な駆動手段であるボールねじの大容量化が進み、相当重量物の移動手段にもこのボールねじ装置が用いられるようになった。サーボモータで駆動するボールねじ装置はサーボモータの回転数をプログラム制御することにより、被駆動物の移動速度と停止位置の制御が容易となる。
これにより二材成形におけるサイクルの高速化が可能となり、また高い精度の動作が実現することができる。
これにより、速度切り換え時における衝撃の緩和となり、電動モータの過電流防止を行うことができ、衝撃による動作部材の損傷を防止、及び部材寿命の延命化が可能となる。
これにより、回転中心から遠方側の重量の低減に伴う回転慣性の低減を図ることができ、この結果、省エネ、高応答性、高精度での制御を実現することができる。
これにより、金型側に、成型品の突き出し用の成型品突出し装置を不要とすることができ、金型の構造を簡素化することができる。この結果、前記金型内可動部材動作の駆動装置を異なる金型で共用できるため、成形品毎に異なり、成型品毎に必要である金型の製造のコストの低減を図ることができる。
これにより、通信配線を有線の場合のための摺動仕様とする必要がなくなり、配線を簡素化することができる。この結果、回転ダイプレートを軽量化することができる。
図6は、回転金型A(6A)の角c2と、回転金型B(6B)の角c1の場合を示す。L1及びL2は、回転ダイプレート9の回転角度と、前記r1、r2の値から一義的に求まる変動数である。
ここで、回転金型A(6A)と回転金型B(6B)が同じ形状であれば、L1=L2である。
固定側金型4の厚さをa、固定ダイプレート2の金型取付け面から回転ダイプレート9の回転軸までの距離をb2、固定ダイプレート2の金型取付け面から可動側金型5の端面までの距離をb1とする。b1、b2は変動数である。
可動側金型5が回転中の回転金型B(6B)に向かって型閉移動するとき、b1-b2-L1=eとなったとき、可動ダイプレート3が減速、又は停止する。
回転金型A(6A)が固定側金型4から離れる方向に移動するとき、及び、可動側金型5が回転金型B(6B)から離れる方向に型開移動するとき、まず、可動ダイプレート3が型開移動し、可動側金型5と回転金型B(6B)の間隔がeを越えた時点から、回転ダイプレート(9)を型開移動、または回転動作を開始する。
次に、本発明の第2の実施の形態について説明する。この第2の実施の形態が、第1の実施の形態と異なるところは、図7に示す二材成形用射出成形機30の平面模式図に示すように、可動ダイプレート3を駆動する可動ダイプレート開閉手段46のサーボモータA(21)とボールねじ軸47の支え台26を反転台7に設置した点であり、これ以外は第1の実施の形態と同じであるので、他の構成の説明は省く。
この第2の実施の形態の利点は、ボールねじ軸47を短くできるのでボールねじ軸4の危険速度が向上し、可動ダイプレート3の開閉速度を速くすることができる。また、回転ダイプレート9と可動ダイプレート3間を直接ボールねじで連結する為、型開閉時等の回転ダイプレート9と可動プレート3との相当距離を検知、制御する際に、回転ダイプレート9と可動ダイプレート3の相対位置の演算が不要であり、制御が容易にできる。
次に、本発明の第3の実施の形態について説明する。この第3の実施の形態が、第1の実施の形態と異なるところは、図8の回転ダイプレートの概略側面図に示すように、回転ダイプレート回転手段50は、反転台7に取付けられたサーボモータC(41)と、サーボモータC(41)に取付けられた小歯車53と、小歯車53と噛み合う回転ダイプレート9に一体に設けられた大歯車52と、小歯車53と大歯車52に巻き掛けられたエンドレスの歯付きベルト54とで構成され、回転ダイプレート9を正逆方向に半回転させる回転駆動手段であることであり、これ以外は第1の実施の形態と同じであるので、他の構成の説明は省く。
本実施の形態によれば、直接、大歯車52と小歯車53とを当接させる必要が無く、大歯車52の回転軸と小歯車53の回転軸の距離を任意に設定できる為、大歯車52の直近に小歯車53を設置できない場合や、減速比を変更する必要が発生した場合に、軸間距離に制約されることが無く、歯車形状を選定できるという、利点がある。
次に、本発明の第4の実施の形態について説明する。この第4の実施の形態が、第1及び第2の実施の形態と異なるところは、図9の回転ダイプレートの概略側面図に示すように、回転ダイプレート回転手段60は、動力伝達のために歯車やエンドレスベルト等を使用せず、反転台7に取付けられたサーボモータD(56)が回転ダイプレート9と一体の台55の回転軸57に直結したダイレクトドライブ方式となっていることである。これ以外は第1の実施の形態と同じであるので、他の構成の説明は省く。
Claims (21)
- 可動側金型を取付けた可動ダイプレートと固定側金型を取付けた固定ダイプレートの間に可動ダイプレートと同方向に移動可能に設置された反転台と、該反転台上で180度回転可能で両面に前記可動側金型と固定側金型とに嵌合してキャビティを形成する金型を取付けた回転ダイプレートと、可動ダイプレートを型開閉する可動ダイプレート型開閉手段と、回転ダイプレートを型開閉する回転ダイプレート型開閉手段と、金型を閉じた後で上記3組のダイプレートを同時に型締めする型締手段と、異なった樹脂材をそれぞれ可塑化して射出充填する2組の射出ユニットとを有する二材成形用射出成形機において、
型締手段は3組のダイプレートを同時に型締めする油圧型締手段であり、
可動ダイプレート開閉手段は電動モータに駆動される可動ダイプレート開閉手段であり、
回転ダイプレート開閉手段は電動モータに駆動される回転ダイプレート開閉手段であり、
回転ダイプレートの回転手段は反転台に取付けられた電動モータにより駆動される回転駆動手段であることを特徴とする二材成形用射出成形機。 - 請求項1において、
油圧型締手段は、固定ダイプレートに内蔵する複数の油圧シリンダ装置と該シリンダ装置のラムに結合され回転ダイプレートと可動ダイプレートを突き通すことができるように設けられた複数の先端溝付きタイバーと可動ダイプレートの外側に備えられ前記タイバーの溝と係合できる割ナットとで構成されていて、3組のダイプレートを同時に型締めする油圧型締手段であり、
可動ダイプレート開閉手段は、電動モータに駆動されるボールねじ軸と可動ダイプレートに取付けられた前記ボールねじ軸と螺合するボールねじナットによる可動ダイプレート開閉手段であり、
回転ダイプレート開閉手段は、電動モータに駆動されるボールねじ軸と反転台に取付けられた前記ボールねじ軸と螺合するボールねじナットによる回転ダイプレート開閉手段であり、
回転ダイプレートの回転手段は、反転台の縦の中心軸に180度正逆回転可能に設置された回転ダイプレートに設けられた水平の大歯車を反転台に設置した電動モータの出力軸に備えらえた小歯車で駆動する回転駆動手段であることを特徴とする二材成形用射出成形機。 - 請求項1において、
可動ダイプレート開閉手段は、固定ダイプレート又は基台に固定された電動モータに駆動されるボールねじ軸と、可動ダイプレートに取付けられた前記ボールねじ軸と螺合するボールねじナットによりなることを特徴とする二材成形用射出成形機。 - 請求項1において、
可動ダイプレート開閉手段は、反転台に固定された電動モータに駆動され、反転台に固設された支え台においてボールベアリングを介して回転自在に軸方向を拘束して支えられたボールねじ軸と可動ダイプレートに固設された前記ボールねじ軸と螺合するボールねじナットよりなることを特徴とする二材成形用射出成形機。 - 請求項1において、
回転ダイプレートの回転手段は、反転台の縦の中心軸に180度回転可能に設置された回転ダイプレートに取付けられた水平の大歯車を歯付きベルト、又は、チエンと小歯車を介して反転台に設置した電動モータで駆動することを特徴とする二材成形用射出成形機。 - 請求項1において、
回転ダイプレートの回転手段は、反転台に取付けられ回転ダイプレートを180度回転させる電動モータで直結駆動することを特徴とする二材成形用射出成形機。 - 請求項1において、
2組の射出ユニットの内の1組は固定ダイプレート側に設置されて固定金型への樹脂射出に用いられ、他の1組は可動ダイプレート側に設置されて可動金型への樹脂射出に使用され稼動時には可動ダイプレートの移動に伴って移動することを特徴とする二材成形用射出成形機。 - 請求項1において、
反転台に同反転台上で回転する回転ダイプレートがその回転限で当接する位置決めピンを設け、回転ダイプレートが一方の回転限に到達した位置と、その戻りの回転限の位置において対向するダイプレートに正対する位置になるよう位置決めピンを突出させることを特徴とする二材成形用射出成形機。 - 請求項1において、
3組のダイプレートを同時に型締めする油圧駆動の型締め装置と、
可動ダイプレートを固定ダイプレートに対し進退させる電動モータ駆動の可動ダイプレート開閉装置と、
回転ダイプレートと反転台を可動ダイプレートと同方向に動作させる電動モータ駆動の回転ダイプレート開閉装置と、
水平方向に反転台を回転させる電動モータ駆動の反転台回転装置と、
前記各電動モータ動作制御をそれぞれフィードバック制御可能な制御装置と、
を備えることを特徴とする二材成形用射出成形機。 - 請求項1において、
3組のダイプレートを同時に型締めする油圧駆動の型締め装置と、
可動ダイプレートを固定ダイプレートに対し進退させる電動モータ駆動の可動ダイプレート開閉装置と、
回転ダイプレートと反転台を可動ダイプレートと同方向に動作させる電動モータ駆動の回転ダイプレート開閉装置と、
水平方向に反転台を回転させる電動モータ駆動の反転台回転装置と、
前記各電動モータ動作制御をそれぞれフィードバック制御可能な制御装置とを備えてなり、
前記各電動モータの少なくとも一つはサーボモータであることを特徴とする二材成形用射出成形機。 - 請求項1において、
3組のダイプレートを同時に型締めする油圧駆動の型締め装置と、
可動ダイプレートを固定ダイプレートに対し進退させる電動モータ駆動の可動ダイプレート開閉装置と、
回転ダイプレートと反転台を可動ダイプレートと同方向に動作させる電動モータ駆動の回転ダイプレート開閉装置と、
水平方向に反転台を回転させる電動モータ駆動の反転台回転装置と、
前記各電動モータ動作制御をそれぞれフィードバック制御可能な制御装置とを備えてなり、
前記フィードバック制御での速度制御の際に、
加速時又は減速時の速度制御は、一定の勾配値で一次直線に従い加速、又は減速を行い、且つ
一定速度からの加速時、又は減速時の速度制御は、
一定速度と加速、又は一定速度と減速の各一次直線速度が、それぞれ接線となる二次曲線に従って速度制御を行うことを特徴とする二材成形用射出成形機。 - 請求項1において、
3組のダイプレートを同時に型締めする油圧駆動の型締め装置と、
可動ダイプレートを固定ダイプレートに対し進退させる電動モータ駆動の可動ダイプレート開閉装置と、
回転ダイプレートと反転台7を可動ダイプレートと同方向に動作させる電動モータ駆動の回転ダイプレート開閉装置と、
水平方向に反転台を回転させる電動モータ駆動の反転台回転装置と、
前記各電動モータ動作制御をそれぞれフィードバック制御可能な制御装置とを備えてなり、
反転台にピンで位置決めする際に、
反転台上で回転する前記回転ダイプレートが対向するダイプレートに正対する位置で、位置決めピン挿入穴に、位置決めピンを挿入可能であることを特徴とする二材成形用射出成形機。 - 請求項1において、
3組のダイプレートを同時に型締めする油圧駆動の型締め装置と、
可動ダイプレートを固定ダイプレートに対し進退させる電動モータ駆動の可動ダイプレート開閉装置と、
回転ダイプレートと反転台7を可動ダイプレートと同方向に動作させる電動モータ駆動の回転ダイプレート開閉装置と、
水平方向に反転台を回転させる電動モータ駆動の反転台回転装置と、
前記各電動モータ動作制御をそれぞれフィードバック制御可能な制御装置とを備えてなり、
反転台にピンで位置決めする際に、
反転台上で回転する前記回転ダイプレートが対向するダイプレートに正対する位置で、位置決めピン挿入穴に、位置決めピンを挿入可能であると共に、
位置決めピン挿入穴中心が、
位置決めピン挿入装置の位置決めピン中心と一致する手前であるところの、反転台回転中の反転台の回転方向の所定の位置で、位置決めピンの挿入動作が開始する制御が可能な制御装置を備えることを特徴とする二材成形用射出成形機。 - 請求項1において、
前記回転ダイプレートの補強リブ厚さが、回転ダイプレートの中央から外側に向けて徐々に減少することを特徴とする二材成形用射出成形機。 - 請求項1において、
回転ダイプレート内に、金型内の成型品突き出し動作、可動入れ子動作、ゲートバルブ動作等、金型内可動部材動作の駆動装置を備えることを特徴とする二材成形用射出成形機。 - 請求項1において、
回転ダイプレート内に、金型内の成型品突き出し動作、可動入れ子動作、ゲートバルブ動作等、金型内可動部材動作の駆動装置を備えると共に、
成型品突き出し装置の動作制御の際、
制御信号を無線により送受信が可能な通信装置を備えることを特徴とする二材成形用射出成形機。 - 請求項1において、
2組の射出ユニットの内の1組は固定ダイプレート側に、固定ダイプレートに対して進退可能に設置され、
他の1組は可能ダイプレート側に固定された摺動基台上に、可動ダイプレートに対して進退可能に設置され、
且つ
前記可動ダイプレートの型開閉時には、
前記他の1組の射出ユニットが、前記可動ダイプレートに取り付けた金型に当接しながら移動可能なことを特徴とする二材成形用射出成形機。 - 請求項1乃至17のいずれか一つに記載する二材成形用射出成形機を用い、
可動ダイプレートと回転ダイプレート積載反転台の型閉、型締め、溶融樹脂の射出充填、冷却、可動ダイプレートと回転ダイプレート積載反転台の型開移動、回転ダイプレートの180度回転、可動ダイプレートと回転ダイプレート積載反転台の再型閉、型締の成形工程において、
可動ダイプレートと回転ダイプレート積載反転台の型開閉移動時間が、最短となるように電動モータにより加速、速度維持、減速を制御することを特徴とする二材成形用射出成形機の制御方法。 - 請求項1乃至17のいずれか一つに記載する二材成形用射出成形機を用い、
反転台上の回転ダイプレートを180度回転するとき、最短の回転時間となるように電動モータにより回転加速、回転速度維持、回転減速を制御することを特徴とする二材成形用射出成形機の制御方法。 - 請求項18において、
移動中の可動ダイプレート、又は、回転ダイプレートが停止するのに必要な距離を衝突防止距離とし、
可動ダイプレート及び金型と回転ダイプレート及び金型のそれぞれの移動先端位置を監視し両ダイプレート又はそれぞれの金型の移動先端の相対位置が衝突防止距離に入ったら自動的に移動中の接近する方のダイプレートを減速、あるいは停止させるようにして可動ダイプレートと回転ダイプレートの開閉移動時の衝突を防止することを特徴とする二材成形用射出成形機の制御方法。 - 請求項18において、
移動中の可動ダイプレート、又は、回転ダイプレートが停止するのに必要な距離を衝突防止距離とし、
可動ダイプレート及び金型と回転ダイプレート及び金型のそれぞれの移動先端位置を監視し両ダイプレート又はそれぞれの金型の移動先端の相対位置が衝突防止距離に入ったら自動的に移動中の接近する方のダイプレートを減速、あるいは停止させるようにして可動ダイプレートと回転ダイプレートの開閉移動時の衝突を防止すると共に、
可動ダイプレートと回転ダイプレートの開閉移動、回転ダイプレート回転をラップして行う際、
回転ダイプレート回転中の回転ダイプレート又はその金型と固定ダイプレート又はその金型、回転ダイプレート又はその金型と可動ダイプレート又はその金型間の相対距離を可動ダイプレート位置及び回転ダイプレートの位置と回転角度とそれぞれの金型の形状寸法値より算出し、衝突防止距離に入ったら自動的に接近する方のダイプレートの移動又は回転ダイプレートの回転を減速、あるいは停止させるようにしたことを特徴とする二材成形用射出成形機の制御方法。
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US10688704B2 (en) | 2016-01-19 | 2020-06-23 | The Japan Steel Works, Ltd. | Mold clamping device and method |
US10940624B2 (en) | 2017-03-30 | 2021-03-09 | The Japan Steel Works, Ltd. | Method for controlling injection molding machine and injection molding machine |
JP2018171891A (ja) * | 2017-03-30 | 2018-11-08 | 株式会社名機製作所 | 射出成形機の制御方法および射出成形機 |
JP2019181702A (ja) * | 2018-04-02 | 2019-10-24 | 株式会社名機製作所 | 成形機および成形機の制御方法 |
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Also Published As
Publication number | Publication date |
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JP4902785B2 (ja) | 2012-03-21 |
EP2269796B1 (en) | 2016-03-23 |
EP2269796A4 (en) | 2013-11-06 |
CN101888921B (zh) | 2013-06-19 |
JPWO2009118833A1 (ja) | 2011-07-21 |
US20100244314A1 (en) | 2010-09-30 |
EP3000577B1 (en) | 2018-02-21 |
EP3000577A1 (en) | 2016-03-30 |
US8163218B2 (en) | 2012-04-24 |
CN101888921A (zh) | 2010-11-17 |
EP2269796A1 (en) | 2011-01-05 |
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