JPH11309748A - Method and apparatus for decorating simultaneously with injection molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for decorating simultaneously with injunction molding in which the sag of a decorating sheet for one shot supplied onto the parting surface of a female mold can be eliminated rationally and surely so that the generation of troubles such as wrinkles in a laminated product to be obtained is prevented. SOLUTION: A tension adjusting projection part 50 for applying tension to a decorating sheet S for one shot is formed on a surface side in contact with a female mold 12 in a clamp means 20, and a sheet pushing recession part 30 is formed in the female mold 12 so that the peripheral part of the decorating sheet S for one shot is pushed into the recession part 30 by the projection part 50.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative laminated product (product) in which a painted sheet on which a pattern, a character or the like is applied in a mold at the same time as injection molding is integrally adhered and laminated on the surface of an injection resin molded product.
The present invention relates to an injection molding simultaneous painting apparatus which obtains the following.

[0002]

2. Description of the Related Art Several methods have been proposed for simultaneous injection molding and painting methods in which a painting sheet is integrally adhered to the surface of an injection resin molded article simultaneously with injection molding.
Most of them are arranged so that all or some of the following steps (a) to (i) are performed in the stated order or permuted, and the steps are sequentially performed or a plurality of steps are simultaneously performed in parallel or in parallel. (Japanese Patent Publication No. 50-19132, Jitsuhei 3
-56344, JP-B-7-41637, etc.).

(A) A sheet supply step of supplying a picture sheet onto a female parting surface used for injection molding. (B) a clamping step of fixing and holding the painted sheet on the female parting surface; (C) A heating softening step of heating and softening the painted sheet with a hot platen or the like. (D) A stretching step (preliminary molding step) of stretching the painted sheet along the female cavity by vacuum suction and / or air supply. (E) A mold clamping step of moving one of the female mold and the male mold (usually a female mold) to the other (usually a male mold) to clamp the mold. (F) An injection molding step of injecting and filling a resin (molten resin) in a flowing state from the male mold side into a cavity formed between the female mold and the male mold to perform injection molding. (G) A mold opening step of separating the female mold and the male mold. (H) A sheet trimming step of separating a portion of the painted sheet to be attached to the injection resin molded body from another portion (excess portion). (I) A take-out step of taking out the laminated product on which the painted sheet is adhesively laminated from both the male and female molds.

[0004] The simultaneous execution of a plurality of steps means that a plurality of steps are included in one step. For example, in the mold clamping step (e), the painted sheet is divided into a female type and a male type. If it is not fixed and held between them, the clamping step (b) is performed simultaneously with the mold clamping step, and the painted sheet is used in the injection molding step (f). If the stretching is performed by the heat and pressure of the injected molten resin, this means that the stretching step (d) is performed simultaneously with the injection molding step.

[0005] As the painting sheet, either a laminated sheet (laminated sheet) or a transfer sheet is used in accordance with the product type. In the case of a laminated sheet, painting is performed as it is by injection molding. That is, all the layers of the sheet are bonded and integrated with the surface of the injection resin molded body to form a decorative layer. On the other hand, when the painting sheet is a transfer sheet, the support sheet of the painting sheet integrated with the surface of the injection resin molded body is peeled off, and only the transfer layer such as the decoration layer remains on the injection resin molding body side. Then, the painting is completed by forming a decorative layer.

[0006]

In the injection molding simultaneous painting method, as described above, it is necessary to supply one shot of the painting sheet onto the female parting surface. The unwinding method (roll / roll method), in which an unwinder winds one shot of a long strip-shaped picture sheet wound up in a roll shape from an upstream of a female die by using an unwinder, and winds the same downstream of the female die. ),
A method in which the leading end of a long strip-shaped picture sheet wound in a roll shape is gripped by a transport chuck or the like and supplied onto a female parting surface, and cut at every shot to form a single sheet sheet, 1 which is cut into a single sheet
There is known a method in which the front and rear ends or the width direction both ends of a pictorial sheet for a shot are gripped with a chuck or the like and supplied on a female parting surface. The painted sheet immediately after being supplied above tends to loosen, and this loosening may cause a problem such as wrinkles on the surface (painted sheet) of the obtained laminated product.

[0007] Of the slack of the painted sheet, the slack in the direction along the painted sheet conveyance direction (longitudinal direction) is as described above.
In the case of a method of unwinding the painting sheet from the unwinding machine, it can be taken out by reversing the unwinding machine, rewinding the painting sheet, and applying tension to the painting sheet,
As described above, it is difficult to apply tension to the painted sheet to remove slack in the painted sheet that has been cut into a single sheet state in advance.

Further, in any of the methods, it is difficult to remove the slack in the width direction of the painted sheet by only the painted sheet supplying means. SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object thereof is to rationally and reliably remove the slack of a one-shot painting sheet supplied on a female parting surface. An object of the present invention is to provide a simultaneous painting apparatus for injection molding in which the obtained laminated product is free from defects such as wrinkles.

[0009]

In order to achieve the above-mentioned object, an injection molding simultaneous painting apparatus according to the present invention basically comprises both male and female molds, and is provided on a parting surface of the female mold. While supplying one shot of the painted sheet, the supplied painted sheet is pressed and fixed on the parting surface by a clamp means, and is stretched so as to be in close contact with the female mold cavity. The mold is clamped, and the resin in a fluid state from the injection molding machine is injected and filled from the male mold into a molding cavity formed between the female mold and the male mold, and after the resin is solidified,
The male and female molds are opened, and a laminated product on which the painted sheet is adhesively laminated is taken out from the male and female molds.

[0010] A tension-adjusting projection for applying tension to the one-shot painted sheet is provided on a surface of the clamping means that is in contact with the female mold. It is characterized in that a concave portion for pushing the sheet is provided so that the outer peripheral portion of the painted sheet is pushed by the convex portion for tension adjustment.

In the apparatus of the present invention having the above-described configuration, after one shot of a sheet with a picture is supplied onto the female parting surface, the sheet is pressed and fixed to the female parting surface. For example, the clamping means including a rectangular frame-shaped clamper is advanced to the female mold side.

At this time, the protruding end of the tension adjusting projection provided on the clamping means is pressed against the entire circumference or a part of the outer circumference of the one-shot painting sheet, and in this pressed state, the female mold is pressed. And the tension adjusting convex portion is eventually provided with the whole or a part of the outer peripheral portion of the one-shot painting sheet along with the sheet pushing concave portion. Accordingly, the entire circumference or a part of the outer peripheral portion of the one-shot painting sheet is pushed into the sheet pushing recess.

Accordingly, the inner peripheral portion (central portion) of the painting sheet is pulled toward the outer peripheral side where the tension adjusting protrusion is provided, and the inner peripheral portion (central portion) of the painting sheet is adjusted according to the height of the tension adjusting convex portion. The resulting tension is applied, and the slack that has occurred is reasonably and reliably removed. As a result, no problem such as wrinkles occurs on the surface (painted sheet) of the laminated product obtained by the device.

In a preferred aspect of the apparatus of the present invention, the tension adjusting projection is formed separately from the clamping means and is detachably attached to the clamping means. The height can be changed. To change the protruding height, prepare a plurality of types of tension adjusting protrusions having different heights and appropriately replace the clamping means. Adjust the protruding height between the clamping means and the tension adjusting protrusion. Measures such as interposing spacers for use.

As described above, by making it possible to change the protruding height of the tension adjusting projection, the tension applied to the painted sheet can be finely adjusted, and the optimal tension can be applied to the painted sheet. Becomes Also,
The tension adjusting projection is preferably made of an elastic material such as urethane rubber, and a protruding end thereof is rounded. More preferably, a radius is provided at an opening edge of the sheet pushing depression. Will be applied. With this configuration, when the outer peripheral portion of the painted sheet is pushed into the sheet pushing concave portion, the pushing operation is smoothly and reliably performed, and the painted sheet is hooked on the convex portion or the concave portion by the pushing operation, Scratches and scratches can be effectively avoided.

In another preferred embodiment, the tension adjusting projection is configured to push the entire periphery of the one-shot painting sheet into the pushing recess.
In another preferred embodiment, the tension adjusting projection is formed in an annular shape, and the tension adjusting projection is non-annular, that is, it is desired to apply tension so that only a part of the outer peripheral portion of the one-shot painting sheet is pushed into the pushing depression. It is provided only in the direction. By doing so, the tension balance can be appropriately adjusted according to the slack state of the painted sheet, the shape of the laminated product to be obtained, and the like.

In the present invention, the male and female molds are made of metal such as iron or ceramics, etc., and if necessary, vacuum suction for preforming or small holes (vacuum suction) for supply of compressed air. Holes). In addition, the female mold is composed of an aggregate of a plurality of divided parts (so-called nested structure)
A slit-shaped gap may be formed between adjacent divided portions, and the gap may be used as a vacuum suction hole to perform vacuum suction.

The female mold is provided with the above-described recess for pushing the sheet. This recess for pushing the sheet
It has a width and depth such that the outer peripheral portion of the painting sheet and the tension adjusting protrusion can enter, and is concave in a form such as, for example, annular or two parallel according to the outer shape of the tension adjusting protrusion. Drill in a groove shape. The male mold is provided with a runner for injecting the resin in a flowing state and a required gate. The number, position, shape and the like of the gates can be freely set in consideration of the shape and the like of the product to be obtained.

Further, a clamping means is provided for fixing and holding the picture sheet on the female parting surface. As the clamping means, a frame-shaped or double-girder-shaped holding plate or the like can be used, and the driving thereof can be performed by using a molding driving force such as a mold clamping operation or by using the power of an ejector pin driving mechanism. In addition to this, it is possible to provide a separate driving means such as a fluid pressure actuator. Then, a tension adjusting projection is provided on the clamping means. The tension adjusting protrusion may be provided integrally with the clamping means, but it is preferable that the tension adjusting protrusion is formed separately and attached later as described above. The manner in which the tension adjusting protrusion is attached to the clamp means may be any method.For example, a mounting groove may be formed in a surface of the clamp means that is in contact with the female mold, and the tension adjusting protrusion may be provided on the mounting groove. Measures such as press-fitting can be adopted.

As a method of supplying the painting sheet, (a) one shot of the long strip-shaped painting sheet wound up in a roll shape is unwound from an upstream of the female die by an unwinder, and is wound at a downstream of the female die. Take-up unwinding method (roll / roll method), (b) while gripping the leading end of a long strip-shaped picture sheet wound up in a roll shape with a transport chuck or the like and supplying it to the female parting surface A method in which a single sheet is cut at every shot, and (c) the front and rear ends or both ends in the width direction of the one-shot picture sheet cut in the state of the single sheet are gripped with a chuck or the like to obtain a female sheet. Although any supply method such as a method of supplying on the mold parting surface can be adopted, the effect of the present invention is particularly advantageous in that the tension is applied in both the conveying direction and the width direction of the painted sheet as in the method (c). Grant It is exhibited in the case where it is difficult to supply method of system is adopted.

In order to accurately register the positions of the pattern of the decorative layer of the painted sheet and the shape of the mold (molded product) with each other, a sensor such as a photoelectric tube is provided on the mold, and the mark sheet is also provided on the painted sheet. And the like, and the feed in the flow direction and / or the width direction of the painted sheet is adjusted so that the painted sheet stops at the position where the sensor reads the sensor mark. Further, the apparatus of the present invention preferably includes a hot plate for performing preforming. As the hot plate, any of a contact heating system using conduction heat and a non-contact heating system using radiant heat or dielectric heating may be adopted.

As the hot platen transfer means, various forms such as a fluid pressure cylinder such as an air cylinder, a linear transfer mechanism using a rack and pinion or a screw feed, and a bogie mechanism running on a guide rail can be adopted. The painted sheet is composed of a base sheet and a decorative layer laminated on the base sheet. The laminated sheet (laminated sheet) used as the final product while the base sheet is tightly integrated with the molded product, or a once-painted sheet Any transfer sheet from which the base material sheet (support sheet) is peeled off after the molding and the molded article are integrated, leaving only the decorative layer (transfer layer) on the molded article side can be used.

In the case of the laminated sheet, a thermoplastic resin such as polyolefin resin such as polyethylene and polypropylene, polyvinyl chloride, acrylic resin, polystyrene, ABS resin, polycarbonate resin and polyester resin is used as the base sheet. Can be. The thickness of the base sheet is usually about 20 to 500 μm. As the decorative layer, a printed pattern, colored or transparent coating, a metal thin film (partly or entirely), or a functional layer such as a hard coating film, an anti-fog coating film, or a conductive layer can be used.

In the case of the transfer sheet, it is for transferring a transfer layer composed of a pattern layer or the like once formed on a releasable support sheet to another transfer target. A release layer may be provided according to the conditions, and the transfer layer includes a release layer, a decorative layer, an adhesive layer, and the like, and layers other than the decorative layer are selected as necessary. The decorative layer is selected from a pattern layer, a metal thin film layer (part or entire surface) or a functional layer such as a hard coating film, an anti-fog coating film, or a conductive layer.

The support sheet is made of nylon 6, nylon 6
A flexible thermoplastic resin film such as a polyamide resin such as No. 6 or the like, a polyolefin resin such as polyethylene or polypropylene, polyvinyl chloride or the like, or a laminate thereof is preferable. As the resin for injection molding, ABS (acrylonitrile-butadiene-styrene copolymer) resin, thermoplastic resin such as polystyrene, polyvinyl chloride, acrylic resin, polycarbonate resin and polyolefin resin are heated and melted to be in a liquid or fluid state. Or a two-part curing type, a catalyst-curing type resin, for example, an uncured liquid such as a urethane resin, a polyester resin, or an epoxy resin, or the like, which can be made of a material conventionally known for simultaneous painting with injection molding. Is selected according to the required physical properties and cost of the product.

[0026]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an overall configuration diagram showing one embodiment of an injection molding simultaneous painting apparatus according to the present invention, and FIG. 2 is a plan view of the female mold shown in FIG. 1 as viewed from the X direction. The laminated product to be obtained by the simultaneous injection-molding and painting apparatus 10 of the present embodiment is a panel having a rectangular shape and a U-shaped cross section in a plan view.
Are laminated by bonding. Here, as the above-mentioned painted sheet S, here, an acrylic resin base sheet (having a thickness of 125 μm) obtained by adding acrylonitrile-butadiene rubber and an aliphatic alcohol-based lubricant to a methyl methacrylate-butyl methacrylate copolymer, Decorative layer laminated by gravure printing method (gravure printing with an ink consisting of a binder of a 1: 1 weight ratio mixture of acrylic resin and vinyl chloride-vinyl acetate copolymer, and a reddish pigment, carbon black, and a pigment of graphite) Wood grain pattern layer)
And an adhesive layer (vinyl chloride-vinyl acetate copolymer system), using a laminated sheet (laminated sheet) that is used as a final product while the base sheet is tightly integrated with the injection molded resin Pa. I have. The decorative layer (pattern layer) has a grain pattern obtained by combining three colors of a pattern plate, and the adhesive layer has a screen ruling of 40 lines / c.
This is a layer having a thickness of 2 μm formed by using twice a gravure solid printing plate (printing depth 60 μm) (gravure printing in two colors).

Injection molding simultaneous painting apparatus 10 of this embodiment
Is provided with a female mold 12 and a male mold 25 each having an uneven shape corresponding to the above-mentioned laminated product to be obtained. The female mold 12 has a bottom portion fixed to a movable plate (not shown), The ram or the like of the cylinder moves forward and backward in a horizontal direction (X direction in FIG. 1), in other words, in a direction approaching / separating from the male mold 25. In the present embodiment, the female die 12 is a movable die as described above and is configured to move in the horizontal direction. However, the present invention is not limited to this. It is also possible to adopt a form in which one of them is vertically opposed and one of them is moved in the vertical direction.

The female mold 12 has a nested structure composed of a plurality of split molds.
2, a cavity 13 corresponding to the laminated product is formed, and a parting surface 14 is formed on the outer peripheral side of the cavity 13. This parting surface 1
4 around the cavity 13
Is formed, and a predetermined number of vacuum suction holes 17 are formed in the sheet fixing suction groove 16 so as to surround the sheet S. It is opened at the pitch.

A slit-like gap 15 serving as a vacuum suction hole is formed between the split molds in the female mold 12. The slit-shaped gap 15 is opened at a boundary between a rounded corner (R) forming a corner of the cavity 13 and a plane part following the corner.
The reason why the slit-shaped gap 15 is opened at the boundary portion is that the boundary portion is most likely to have a trace of a line remaining on the laminated product P due to the existence of the gap 15 used as a vacuum suction hole. This is because it is an inconspicuous part.

A vacuum suction hole 17 opened in the sheet fixing suction groove 16 and the slit-shaped gap 15 are connected to the outside through a vacuum suction passage 18 and a conduit 19 formed in the female die 12. In this embodiment, the vacuum suction holes 17, the sheet fixing suction grooves 16, the slit-shaped gaps 15, the vacuum suction passages 18, the conduits 19, and an external vacuum pump are connected. And the like constitute a vacuum suction means.

Further, the parting surface 1 of the female mold 12
4 is provided with an annular mounting groove 23 in which an O-ring 22 is mounted on the outer circumferential side of the sheet fixing suction groove 16. When the O-ring 22 is pressed against a parting surface 14 of the female mold 12 with a rectangular frame-shaped or cross-girder-shaped clamper 20 (shown by phantom lines in FIG. It serves to hermetically block the cavity 12 from the outside. On the other hand, although not shown, the male mold 25 is fixed to a fixed plate on which a nozzle of an injection molding machine is mounted, and the male mold 25 has a projection (core) corresponding to the laminated product shape. ) Is provided, and a runner 27 for injecting the molten resin and a gate 28 connected to the runner 27 are provided therein.

FIG. 2 is a perspective view of the female mold 12 for pressing and fixing the picture sheet S to the parting surface 14 thereof.
As shown in FIG. 1A, a clamper 20 having a rectangular frame shape or a cross-girder shape when viewed from the X direction in FIG. As shown in FIG. 3 in addition to FIG. 1, the surface of the clamper 20 which faces the female mold 12 is provided with a tension adjusting member for applying tension to the one-shot painting sheet. Convex part 5
0 is provided.

The tension adjusting projection 50 is made of an elastic material such as urethane rubber or silicon rubber and is formed in a substantially rectangular ring shape. The tension adjusting projection 50 is provided on the surface 20a of the clamper 20 which is in contact with the female die 12. It is press-fitted and detachably held in a rectangular annular mounting groove 51 for attachment. On the bottom side of the mounting groove 51, as shown in FIG. 5A, the height of the projection 50 of the tension adjusting projection 50 from the surface 20a on the female die 12 side can be changed. As described above, the spacer 52 for adjusting the protruding height of a rectangular ring and a rectangle with a rounded section is fitted and inserted.

That is, in the present embodiment, with the spacer 52 inserted into the mounting groove 51, the tension adjusting projection 50 is stopped in the mounting groove 51 by hitting the spacer 52. Press in. Thereby, the protrusion height of the tension adjusting projection 50 is H
a. On the other hand, as shown in FIG.
With the spacer 52 not inserted into the mounting groove 51, the tension adjusting protrusion 50 is pressed into the mounting groove 51 until it hits the bottom and stops. Is Hb lower than Ha. Further, as shown in FIG. 5C, in a state where another spacer 53 longer than the spacer 52 is inserted in place of the spacer 52, the tension adjusting projection 50 is inserted into the mounting groove 51. Spacer 53
And press-fit until stopped, the protrusion height of the tension adjusting projection 50 is higher than the height Ha by Hc.
Becomes

On the other hand, the parting surface 14 of the female mold 12
In the portion between the suction groove 16 for fixing the sheet and the mounting groove 23 in which the O-ring 22 is inserted and facing the convex portion 50 for adjusting tension, the outer periphery of the one-shot pictured sheet S A rectangular annular sheet pushing recess 30 is provided so that the portion is pushed. The concave portion 30 for pushing the sheet is provided with the convex portion 5 for tension adjustment.
It has a width somewhat wider than the width of 0, and its depth is also deeper than the maximum protruding height that the tension adjusting projection 50 can take. The protruding end of the tension adjusting projection 50 is rounded, and the opening edge of the sheet pushing recess 30 is rounded.

In addition to the above, in the apparatus 10 of the present embodiment, in order to supply the painting sheet S between the parting surface 14 of the female die 12 and the clamper 20, the sheet S is cut into a single sheet state. A transport chuck 3 for gripping front and rear ends of the shot sheet S in the transport direction (Z direction in FIG. 1).
A painting sheet supply means provided with 1, 32 is provided. Further, although not shown, a well-known hot plate is provided for performing preforming. The hot platen is moved by a hot platen transfer means such as an air cylinder from a stand-by position outside the male and female forming dies to a painting sheet heating position on the parting surface 14 of the female mold 12 to heat and soften the painting sheet S. It has become.

The apparatus 1 of this embodiment having such a configuration
In FIG. 1, the one-shot sheet-shaped pictorial sheet S whose front and rear ends are gripped by the transfer chucks 31 and 32 is, as shown in FIG. After being supplied between the clamper 20 and the clamper 20, the sliding rods 24 inserted into the four corners of the outer peripheral portion of the cavity of the female mold 12 are fixed to the female mold parting surface 14 by pressing the sliding rods 24. By retracting the inside, the clamper 20 is advanced to the female mold 12 side.

At this time, as shown in FIG. 3, a tension adjusting projection 50 provided on the clamper 20 is provided.
Is pressed against the entire circumference of the outer peripheral portion of the one-shot picture sheet S, and advances in the pressed state toward the sheet pressing recess 30 provided in the female die 12, and finally (when the clamping process is completed). 4), as shown in FIG. 4, the tension adjusting projections 50 are provided along with the entire periphery of the outer peripheral portion of the one-shot painting sheet S in the sheet pushing recess 3.
0, and accordingly, the entire periphery of the outer periphery of the one-shot pictured sheet S becomes the sheet pushing recess 30.
Is pushed into.

As a result, the inner peripheral portion (central portion) of the one-shot painting sheet S is pulled toward the outer peripheral side where the tension adjusting convex portion 50 is provided, and the tension adjusting convex portion is provided. A tension corresponding to the height of the portion 50 is applied, and the slack that occurs is rationally and reliably removed. As a result, there is no problem such as wrinkles on the surface (painted sheet) of the laminated product obtained by the device 10. Further, the tension adjusting projection 50 is used.
Is formed separately from the clamper 20 and is detachably mounted by press-fitting into a mounting concave groove 51 provided in the clamper 20, and the height of the protrusion is set to the spacer. Since it can be changed by replacing 52, the tension applied to the painted sheet S can be finely adjusted, and the optimal tension can be applied to the painted sheet S.

The tension adjusting projection 50 is
It is made of an elastic material such as urethane rubber, and its protruding end is rounded.
The edge of the opening is rounded, so that when the outer peripheral portion of the painted sheet S is pushed into the sheet pushing recess 30, the pushing operation is performed smoothly and reliably.
It is possible to effectively avoid a situation in which the painting sheet S is caught by the projections 50 or the depressions 30 or rubbed and damaged by the pushing operation.

In the present embodiment, the tension adjusting projections 50 are formed in an annular shape so that the entire outer periphery of the one-shot painting sheet S can be pushed into the pushing recess 30. Instead, the tension adjusting projection 50 is provided non-circularly, that is, provided only in the direction in which tension is to be applied, so that only a part of the outer peripheral portion of the one-shot painting sheet is pushed into the pushing recess 30. You may. By doing so, the tension balance can be appropriately adjusted according to the slack state of the painted sheet, the shape of the laminated product to be obtained, and the like.

After the loosening and clamping steps of the painted sheet S are completed as described above, the painted sheet is heated and softened by the hot platen and the painted sheet S is evacuated by the vacuum suction means, as in the prior art. , And stretched so as to be closely adhered along the female mold cavity. Then, the male and female molds 12, 25 are clamped, and the resin in a flowing state from the injection molding machine is removed from the male mold. After injection-filling into a molding cavity formed between the female mold 12 and the male mold 25, and after the resin is solidified, the male and female molds 12, 25 are opened, and the male and female molds are opened. 1
From the products 2 and 25, a laminated product on which the painting sheet is bonded and laminated is taken out.

[0043]

As will be understood from the above description, according to the simultaneous injection-molding and painting apparatus of the present invention, the tip of the tension adjusting projection provided on the clamping means has a one-shot painting sheet. Is pressed against the entire circumference or a part of the outer circumference of the female die, and in this pressed state, the female die is advanced toward the sheet pushing concave portion, and finally, the tension adjusting convex portion corresponds to the one shot. The entire periphery or a part of the outer periphery of the one-shot painted sheet enters the sheet pushing recess provided in the female mold along with the entire periphery or a part of the outer periphery of the painted sheet. The inner peripheral portion (central portion) of the painted sheet is pulled toward the outer peripheral side where the tension adjusting convex portion is provided, whereby the tension adjusting convex portion is pulled. Convex part The tension according to the height is given, and the slack that has occurred is rationally and reliably removed, so that the surface (painted sheet) of the laminated product obtained by the device should be free from wrinkles and other defects. it can.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing one embodiment of an injection molding simultaneous painting apparatus according to the present invention.

FIG. 2 is a plan view of the female mold shown in FIG. 1 as viewed from the X direction.

FIG. 3 is an enlarged view for explaining slack removal of a painted sheet during a clamping process of the apparatus shown in FIG. 1;

FIG. 4 is an enlarged view for explaining slack removal of a painted sheet during a clamping step of the apparatus shown in FIG. 1;

FIG. 5 is a diagram for explaining a protruding height of a tension adjusting projection provided in the apparatus shown in FIG. 1;

[Explanation of symbols]

 S Painting sheet 10 Injection molding simultaneous painting apparatus 12 Female mold 13 Cavity 14 Parting surface 15 Slit-like gap 16 Suction groove for fixing sheet 17 Vacuum suction hole 20 Frame-shaped clamper 22 O-ring 30 Sheet depression 31, 32 Conveyance Chuck 50 Tension adjustment protrusion 51 Mounting groove 52 Spacer for adjusting protrusion height

Claims (8)

[Claims] An image forming apparatus comprising: a male and a female mold; a picture sheet for one shot supplied on a parting surface of the female mold; and the supplied picture sheet is pressed and fixed on the parting surface by a clamp. And at the same time, stretched to adhere along the female mold cavity, and then
The male and female molds are clamped, and the resin in a flowing state from an injection molding machine is injected and filled from the male mold into a molding cavity formed between the female mold and the male mold. After solidification, the mold opening of the male and female molds is performed, and an injection molding simultaneous painting apparatus configured to take out a laminated product in which a painting sheet is bonded and laminated from the male and female molds, wherein the clamping means On the side facing the female mold,
A tension-adjusting projection for applying tension to the one-shot painted sheet is provided, and an outer peripheral portion of the one-shot painted sheet is pushed into the female mold by the tension-adjusting projection. The simultaneous injection-molding and painting apparatus is provided with the sheet pressing recess. 2. The device according to claim 1, wherein the tension adjusting projection is formed separately from the clamping means, and is detachably attached to the clamping means. Injection molding simultaneous painting equipment. 3. The simultaneous injection-molding and painting apparatus according to claim 2, wherein the tension-adjusting projection has a height that can be changed. 4. The simultaneous injection molding and painting apparatus according to claim 2, wherein the tension adjusting projection is made of an elastic material such as urethane rubber. 5. The tension adjusting convex portion is formed in an annular shape so that the entire periphery of the one-shot painting sheet can be pushed into the pushing concave portion. Injection molding simultaneous painting apparatus according to any one of the above. 6. The tension adjusting projection according to claim 1, wherein only a part of an outer peripheral portion of the one-shot painting sheet is pushed into the pushing recess. Injection molding simultaneous painting apparatus according to Crab. 7. The simultaneous injection-molding and painting apparatus according to claim 1, wherein a protruding end of the tension adjusting projection is rounded. 8. The simultaneous injection-molding and painting apparatus according to claim 1, wherein a radius is applied to an edge of an opening of the concave portion for pushing the sheet.