JP2000117774A - Equipment for foil decorating simultaneous with injection molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide equipment for decorating simultaneous with injection molding which enables automatic and quick execution of a trimming process for cutting off a surplus part not necessary to be annexed to a laminated product to be obtained, with on need to provide separately a device to be used exclusively therefor and thus enables improvement of production efficiency, saving of energy, etc. SOLUTION: In order to shut off a cavity 13 from outside airtightly, an O ring 22 is fitted on a female mold parting face 14, in a state of a part of the ring being projected from the parting face 14, so that a decorating sheet S be held between them and compressed by a clamping means 20 at the time when the clamping means operates to press and fix the decorating sheet. The clamping means 20 is provided with a ring-shaped cutting implement 41 as a trimming means for cutting off a surplus part of the decorating sheet S after the decorating sheet S is held with pressure by the means and the O ring 22 at the time of the operation of pressing and fixing the decorating sheet, while a cutting implement receiving part 42 having a ring-shaped groove 43 receiving the ring-shaped cutting edge 41 is provided in the female mold parting face 14.

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 apparatus and a method for simultaneous painting by injection molding, which are adapted to obtain 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 pressing and fixing the painted sheet to 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 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 cutting out a surplus portion of the painted sheet that does not need to be adhered to the injection resin molded body. (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.

[0005] Simultaneously performing a plurality of steps simultaneously 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.

[0006] As the painting sheet, either a laminated sheet (laminated sheet) or a transfer sheet is used depending on 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.

[0007]

In carrying out simultaneous painting by injection molding, as described above, the sheet supply step of supplying one shot of a painting sheet on the female parting surface and the painting sheet are performed as described above. The clamping process of pressing and fixing to the parting surface is essential,
In particular, when the painted sheet is a laminated sheet, it is necessary to hold and fix the one-shot painted sheet at the time of sheet supply or sheet clamping, so that it is necessary to adhere to the laminated product to be obtained. In order to complete a laminated product as a product, it is necessary to trim the surplus portion.

Conventionally, in this trimming step, a picture-coated sheet is adhesively laminated on an injection resin molded article (molded product), taken out from both male and female molds, and then mechanically operated by a dedicated trimming device outside the male and female molds. Or, it is common for the operator to perform the work manually, and the trimming work takes a relatively long time, and cannot be said to be efficient in production. There was a problem that a great deal of labor was required.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems. An object of the present invention is to separately perform a trimming step of trimming a surplus part that does not need to be attached to a laminated product to be obtained by using a dedicated device. It is an object of the present invention to provide a simultaneous painting apparatus for injection molding, which can be performed automatically and promptly without the need for providing the same, thereby improving production efficiency and saving labor.

[0010]

In order to achieve the above object, an injection molding simultaneous painting apparatus according to the present invention basically comprises a male and female mold and one part on the parting surface of the female mold.
Sheet supply means for supplying a pictorial sheet for shots,
And clamping means for moving the supplied painted sheet onto and from the parting surface so as to press and fix the supplied painted sheet on the parting surface. And in addition to the above,
Trimming means is provided for cutting out a surplus part of the painted sheet supplied on the parting surface which does not need to accompany the laminated product to be obtained by using the painted sheet pressing and fixing operation of the clamping means. It is characterized by.

As a more preferred embodiment, when the painting sheet is pressed and fixed to the female parting surface by the clamping means, an O-ring is provided on the parting surface so as to hermetically shut off the cavity from the outside. When the clamping means presses and fixes the painted sheet, it is mounted with a part thereof protruding from the parting surface so as to be compressed by the clamping means with the painted sheet interposed therebetween, and the female At the same time as or after the painting sheet is clamped between the clamping means and the O-ring during the painting sheet pressing and fixing operation on one of the mold parting surface and the clamping means, A cutting tool is provided as trimming means for cutting a portion, and a cutting tool receiving portion such as a groove for receiving the cutting tool is provided on the other side. It is provided.

As the cutting tool, there can be used various tools such as an annular cutting tool such as a Thomson blade, an annular heating wire made of a heating wire such as a nichrome wire, and an ultrasonic cutter arranged in an annular shape. Further, as the cutting tool receiving portion, an elastic member such as rubber can be used in addition to an annular groove, a concave portion, or the like. In a preferred aspect of the present invention, the cutting tool is provided at a position recessed from a sheet pressing surface of the clamping means, and the cutting tool receiving portion is provided at a position protruding from the female parting surface.

In a preferred embodiment of the simultaneous painting apparatus for injection molding according to the present invention having the above-described structure, the clamping means is advanced toward the female parting surface during the step of clamping the painted sheet by the clamping means. When this is done, the sheet pressing surface of the clamping means is pressed against the top of the O-ring with the pictorial sheet interposed therebetween, whereby the O-ring is slightly compressed and before the pictorial sheet is pressed against the parting surface. The O-ring and the clamping means hold the nip, so that no displacement occurs. At this time, since the cutting tool is preferably located behind the sheet pressing surface of the clamp means in the forward direction, the cutting tool does not come into contact with the painted sheet, and therefore, the painted sheet is not cut off.

Further, when the clamping means is advanced, the O-ring is further compressed by the sheet pressing surface portion, and the cutting tool comes into contact with the painting sheet, so that the painting sheet is moved by the cutting tool and the cutting tool receiving portion. Cut out as if sandwiched.

As described above, in the apparatus of the present invention, in the clamping step of pressing and fixing the painted sheet to the female parting surface by the clamping means, the female sheet parting surface is utilized by utilizing the painting sheet pressing and fixing operation of the clamping means. Of the painted sheets supplied above, the surplus portion of the peripheral portion of the laminated product which does not need to be attached to the laminated product to be obtained (painted molded article) is cut off, so that the The trimming step of cutting out a surplus part that does not need to be attached can be performed automatically and quickly without the need of providing a special device separately, thereby improving production efficiency and saving labor. .

In the present invention, the male and female molds are made of metal such as iron or ceramics, and are provided with small holes (vacuum suction holes or the like) for vacuum suction or supply of compressed air as required. Further, the female mold is constituted by an aggregate of a plurality of divided portions (in a so-called nested structure), a slit-like gap is formed between adjacent divided portions, and vacuum suction is performed using this gap as a vacuum suction hole. It may be. 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 clamp means is provided for fixing and holding the painting sheet on the female parting surface. As the clamping means, those having a frame shape or a cross-girder shape in a plan view can be used. In order to move the clamping member forward and backward with respect to the female parting surface (pressing and fixing the painted sheet at the time of forward movement), the mold is clamped. In addition to using a molding driving force for operation and the like, and using the power of an ejector pin driving mechanism, this is achieved by providing a separate driving means such as a fluid pressure actuator.

As a method of supplying a picture sheet, generally,
When the painting sheet is a laminate sheet, the painting sheet and the molded product are integrated and cannot be wound up. Therefore, one shot of the long strip-shaped painting sheet wound up in a roll shape is used. The unwinding and rewinding system (so-called roll / roll system), in which the uncoated machine unwinds from the upstream side of the female die and winds the painted sheet that has passed between the two dies with a winding machine downstream of the female die, cannot be adopted. Usually, a transport chuck and a receiving fixed chuck are provided, and by the transport chuck, the leading end of the painted sheet unwound from the unwinder is near the upstream end when viewed in the transport direction of the painted sheet in the female mold. , And pull it to near the downstream end of the female die for conveyance.The front end of the picture sheet conveyed by this conveyance chuck is received and fixed by the receiving and fixing chuck. A so-called cooperating chuck system is used in which the painted sheet is clamped on the parting surface, and thereafter, the painted sheet is cut over the entire width on the upstream side of the painted sheet clamping means, and one shot of the painted sheet is cut off from the upstream side. used.

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. In addition,
As a painting sheet for simultaneous injection molding die painting, as described above, it is composed of a base sheet and a decorative layer laminated thereon, and is used as a final product while the base sheet is tightly integrated with the molded product. After the laminated sheet (laminated sheet), the painted sheet and the molded product are integrated, the transfer that peels off the base material sheet (support sheet) while leaving only the decorative layer (transfer layer) on the molded product side Although there is a sheet, in the case of a transfer sheet, it is usually possible to apply the present invention because the trimming step is unnecessary, but it is possible to remove the base sheet from the mold while leaving the base sheet on the laminated product, Is used as a temporary laminated sheet for protecting the surface of a laminated product, and there is also a use of peeling it off at a necessary time, which is effective in this case. On the other hand, the present invention is effective when a laminated sheet is used as the painting sheet, and particularly in the case of a roll / roll system, it cannot be wound up without trimming, so that the effect is particularly large.

In the case of the laminated sheet, the base sheet may be a single layer of a thermoplastic resin such as a polyolefin resin such as polyethylene or polypropylene, polyvinyl chloride, acrylic resin, polystyrene, ABS resin, polycarbonate resin or polyester resin. Alternatively, a laminate can be used. The thickness of the base sheet is usually 20-500μ
m. As the decorative layer, a printed pattern, colored or transparent coating, a metal thin film, or a functional layer such as a hard coating film, an antifogging paint, or a conductive layer can be used.

As the resin for injection molding, ABS (acrylonitrile-butadiene-styrene copolymer) resin,
Thermoplastic resins such as polystyrene, polyvinyl chloride, acrylic resin, and polycarbonate resin that have been heated and melted to be in a liquid or fluid state, or two-pack curable and catalyst-curable resins such as urethane resins and polyester resins Conventionally known materials can be used for painting simultaneously with injection molding, such as an uncured liquid such as an epoxy resin, and are selected according to the required physical properties and cost of the product.

[0022]

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 schematic plan view of a female die shown in FIG.

The laminated product to be obtained by the simultaneous painting apparatus 10 for injection molding of the present embodiment is a panel having a rectangular shape and a U-shaped cross section in plan view, and a painted sheet S is bonded and laminated on the surface of the injection resin molded body. Things. Here, as the above-mentioned painted sheet S, a base sheet made of acrylic resin (having a thickness of 125 μm) and a decorative layer (one of acrylic resin and vinyl chloride-vinyl acetate copolymer) laminated thereon by a gravure printing method are used. : 1 weight ratio mixture consisting of a binder and a pigment pattern mainly composed of a red stencil) and an adhesive layer (vinyl chloride vinyl acetate copolymer system). A laminated sheet (laminated sheet) used as a final product while being integrated is used. The decorative layer (pattern layer) has a wood grain pattern formed by combining three colors of a pattern plate, and the adhesive layer has a gravure solid printing plate (screen depth of 60 μm) having a screen ruling of 40 lines / cm. Using (Gravure printing 2
This is a layer having a thickness of 2 μm formed by color printing.

Injection molding simultaneous painting apparatus 10 of the illustrated embodiment
Is provided with a female mold 12 and a male mold 30 each having an uneven shape corresponding to the above-mentioned laminated product to be obtained (painted molded body). The female mold 12 is not shown, but the bottom thereof is a movable platen. It is fixed and is configured to move forward and backward in a horizontal direction (X direction in FIG. 1), in other words, in a direction approaching / separating from the male mold 30 by a ram or the like of a fluid pressure cylinder. In addition,
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 arranged to be opposed to the other and moved in the vertical direction.

Above the female mold 12 (upstream in the sheet running direction), the unwinding machine 1 as sheet supply means for supplying a painting sheet (laminated sheet) S on the parting surface 14 of the female mold 12 and A sheet feed roll 3 composed of a nip roll is provided, and a transport chuck 51 that can be advanced and retracted in a sheet traveling direction (Z direction in FIG. 1) by driving means (not shown) such as a fluid pressure cylinder, and a female type sheet. A receiving fixed chuck 52 fixed to the downstream side in the traveling direction is provided, and the unwinding machine 1 is
The front end of the painted sheet S unwound from the female mold 12 is gripped near the upstream end when viewed in the conveying direction of the painted sheet S in the female die 12, pulled to near the downstream end of the female die, and conveyed. Pictured sheet S conveyed by chuck 51
Is received and fixed by the receiving and fixing chuck 52.

A cavity 13 corresponding to the laminated product to be obtained is formed in the female mold 12. The cavity 13 is used for vacuum suction so that the painting sheet S is stretched along the cavity 13. Are opened. The vacuum suction holes 15, 15,... Are connected to an external vacuum source (comprising a vacuum pump or the like) through a vacuum suction passage 18 and a conduit 19. Have been.

Further, when the picture sheet S is pressed and fixed to the female parting surface 14 by a clamper 20, which will be described later, which is a clamping means, the female mold 12 is adapted to hermetically shut off the cavity 13 from the outside. , O-ring 22
On the parting surface 14, the clamped sheet 20 is compressed by the clamper 20 with the painted sheet S interposed therebetween when the clamped sheet 20 is pressed and fixed.
It is mounted in the O-ring mounting groove 23 with a part thereof protruding from the parting surface 14.

On the other hand, although not shown, the male mold 30 is fixed to a fixed plate on which a nozzle of an injection molding machine is mounted, and the male mold 30 has a convex shape corresponding to the laminated product shape. A core portion 31 is provided, and a runner 32 for injecting the molten resin and a gate 33 connected to the runner 32 are provided inside the core portion 31.

In order to press and fix the supplied one-shot picture sheet S on the parting surface 14, the female mold 12 has a rectangular frame shape or a plan view shape as shown in FIG. A girder-shaped clamper 20 is provided. The clamper 20 is driven perpendicularly to the parting surface 14 by a driving means (not shown) via four sliding rods 24 connected to four corners thereof (X in the drawing).
Direction), and the forward movement toward the female parting surface 14 is the press-fixing operation with the painted sheet.

The clamper 20 has a sheet pressing surface portion 20 whose outer peripheral portion is in contact with the parting surface 14, as can be clearly understood from FIGS.
a, the painting sheet S is clamped and held by the clamper 20 and the O-ring 22 in the outer peripheral recess 26 during the operation of pressing and fixing the painting sheet by the clamper 20. After that, an annular cutting blade 41 is provided as a trimming means for trimming the surplus portion of the sheet S before the sheet S is completely pressed against the parting surface 14.

The parting surface 14 of the female mold 12
On the upper side, an annular cutting blade 4 provided on the clamper 20 is provided.
A cutting tool receiving portion 42 having a substantially rectangular annular shape in plan view provided with an annular groove 43 for receiving the first member 1 is joined and fixed so as to protrude above the parting surface 14 (see also FIG. 2).

Here, as shown in FIG.
The projecting length of the ring 22 from the parting surface 14 is Ha, and the clamper 20 on which the annular cutting blade 41 is disposed.
The concave length of the outer peripheral concave portion 26 from the sheet pressing surface portion 20a is Hb smaller than the protruding length Ha of the O-ring 22,
The protruding length of the cutting tool receiving portion 42 from the parting surface 14 is Hc smaller than the protruding length Ha and the dent length Hb, and furthermore, the annular cutting blade 41 extends from the bottom of the outer peripheral recess 26. The protrusion length is Hd smaller than the recess length Hb. In addition to the above, a well-known hot plate (not shown) 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 the case of 0, when performing simultaneous painting with injection molding,
First, as shown in FIG. 1, the female die 12 is formed by a sheet feeding means employing a cooperative chuck system including an unwinding machine 1, a sheet feed roll 3 composed of a nip roll, a transport chuck 51, and a fixed receiving chuck 52. Parting surface 1
A sheet (laminated sheet) S for one shot is supplied to a portion between the sheet 4 and the sheet pressing surface 20a of the clamper 20. More specifically, the leading end of the painted sheet S unwound from the unwinding machine 1 via the sheet feed roll 3 is near the upstream end when viewed in the transport direction of the painted sheet S in the female die 12 by the transport chuck 51. The transport chuck 5 is gripped and pulled to near the downstream end of the female mold 12 and transported.
The receiving and fixing chuck 52 receives and fixes and fixes the leading end portion of the picture sheet S conveyed by 1. At this time, a predetermined tension is applied to the painted sheet S by slightly rewinding the painted sheet S by the unwinding machine and the sheet feed roll 3, and the painted sheet S is
They are arranged in a state where they are spread on top (see FIG. 1).

Subsequently, the clamper 20 is advanced to the parting surface 14 side, and the supplied painted sheet S is pressed and fixed on the parting surface 14 by the sheet pressing surface portion 20a of the clamper 20. Here, when the clamper 20 is advanced, first, as shown in FIG. 5, the sheet pressing surface portion 20a of the clamper 20 is pressed against the top of the O-ring 22 with the picture sheet S interposed therebetween. The O-ring 22 is slightly compressed, so that the O-ring 22 and the clamper 20 hold the O-ring 22 before the picture sheet S is pressed against the parting surface 14, so that no misalignment occurs. At this time, the annular cutting blade 41 is moved to the sheet pressing surface 20a of the clamper 20.
Since it is located on the rear side when viewed more in the forward direction, it does not contact the painted sheet S, and therefore, the painted sheet S is not cut off. Further, at this time, the female die upstream portion of the painting sheet S is gripped and fixed by using the transport chuck 51 which has returned to the upstream portion from the female die. This is to prevent the painting sheet S from vibrating and hindering the process during the subsequent trimming process and the dividing process between one shot of the painting sheet and its upstream side.

Further, when the clamper 20 is further advanced, as shown in FIG.
Oa further compresses the O-ring 22 to press the painted sheet S against the parting surface 14. The outer peripheral portion of the painted sheet S facing the annular cutting blade 41 is formed by the outer peripheral concave portion 26 of the clamper 20. By the action of the cutting tool receiving portion 42 and the cutting tool receiving portion 42, the cutting tool is not pressed against the parting surface 14, but is cut off so as to be sandwiched between the annular cutting blade 41 and the annular groove 43 of the cutting tool receiving portion 42.

Although not shown in the drawings, after the painted sheet S is fixed to the female parting surface by the clamper 20, the whole width of the painted sheet S is moved between the clamper 20 and the transported chuck 51 which has returned. Cuts the current shot (clamped portion) of the painted sheet and its upstream side, and the heat and stress of preforming and injection molding goes back to the next shot of the upstream sheet. To prevent them from doing so.

As described above, in the device 10 of the present embodiment,
At the time of the clamping step of pressing and fixing the painted sheet S to the female parting surface 14 by the clamper 20, the painting sheet S supplied onto the female parting surface 14 is supplied using the painted sheet pressing and fixing operation of the clamper 20. Since the surplus part that does not need to be attached to the laminated product to be obtained is cut out, the trimming step of cutting out the surplus part that does not need to be attached to the laminated product to be obtained is to be separately provided with a dedicated device. It can be performed automatically and promptly without the need, thereby improving production efficiency and saving labor.

After the clamping step and the trimming step, preferably, a hot platen (not shown) is moved onto the picture sheet S pressed and fixed by the clamper 20 to heat and soften the picture sheet S. At the same time, vacuum suction is performed by vacuum suction means including a vacuum suction hole 15 or the like opened in the female mold cavity 13 to stretch the painted sheet S so as to closely adhere along the female mold cavity 13 (so-called preforming). .

Thereafter, the female mold 12 is moved to the male mold 30 side, and the male mold 30 and the female mold 12 are clamped, and the resin in a flowing state from the injection molding machine is removed from the female mold 12 and the male mold 30. After injection molding into a molding cavity formed between the molding resin 30 and the resin, the resin is solidified. Then, the male and female molds 12 and 30 are opened, and the painted sheet S is adhered and laminated on the surface of the injection resin molding. Take out the already trimmed laminated product (usually pulled out of the cavity while attached to the male mold,
Then, it is pushed away from the male mold by an ejector pin or the like). In the above embodiment, the annular cutting blade 41 is provided in the outer peripheral concave portion 26 of the clamper 20 and the cutting tool receiving portion 42 is provided on the female parting surface 14 in a protruding manner.
The present invention is not limited to such a configuration, and can take other forms as shown in FIGS.

FIG. 7 shows a state in which the annular cutting blade 45 protrudes from the parting surface 14 with the annular cutting blade 45 protruding from the female parting surface 14 (however, the protruding length is smaller than the protruding length of the O-ring 22). And an elastic member 46 such as rubber having a rectangular annular shape in plan view as a cutting tool receiving portion is disposed in the outer peripheral concave portion 26 of the clamper 20. Also in this case, at the time of the painting sheet pressing and fixing operation of the clamper 20, after the painting sheet S is squeezed and held by the clamper 20 and the O-ring 22, until the painting sheet S is pressed against the parting surface 14. The surplus portion of the picture sheet S is cut off by the annular cutting blade 45. In addition, the annular cutting blade 45 cuts the sheet S with a picture by cooperating with the elastic member 46 as a cutting tool receiving portion.

FIG. 8 shows a heating wire 61 made of a heating wire such as a nichrome wire as a cutting tool at the tip of a predetermined number of support rods 63 arranged in a rectangular shape in the outer peripheral concave portion 26 of the clamper 20.
Is annularly stretched so as to slightly protrude from the sheet pressing surface portion 20a toward the female parting surface 14.
An annular groove 62 as a cutting tool receiving portion is formed in the parting surface 14 of the female mold 12. In this case, heat is applied to the heating wire 61 to generate heat, and the heat is used to melt and cut the painting sheet S. By controlling the timing at which the heating wire 61 is energized, the cutting timing of the painting sheet is controlled. Can be adjusted arbitrarily. That is, when the clamped sheet 20 is pressed and fixed by the clamper 20, the heating wire 61 comes into contact with the painting sheet S prior to the sheet pressing surface portion 20a. No melting cutting of the painting sheet S by 61 is performed. Therefore, in this case, after the painting sheet S is completely pressed and fixed to the female parting surface 14 by the clamper 20, for example, when the stretching process is performed,
The heating sheet 61 is energized to generate heat, and the sheet S
Can be melt-cut and the surplus portion can be cut off.

Further, the present invention is capable of various embodiments other than the above embodiment. For example, in a mode in which a transfer sheet is used as the painting sheet (in this case, the product can be taken out of the mold in a state in which the support sheet is temporarily bonded to the laminated product as a protective film that can be peeled off), the supply step of the painting sheet is called a roll / A mode in which the trimming is performed by a roll method, and at the same time that the sheet pressing surface portion 20a of the clamper is in contact with the tip of the O-ring 22 with the picture sheet S interposed therebetween, and the cutting tool is in contact with the sheet (for example, in FIG. = Hc = Hb).

[0043]

As can be understood from the above description, according to the simultaneous injection molding and painting apparatus of the present invention, the clamping means is used in the clamping step of pressing and fixing the painting sheet to the female parting surface by the clamping means. By using the painted sheet pressing and fixing operation of the above, the surplus portion of the painted sheet supplied on the female parting surface which does not need to be attached to the laminated product to be obtained is cut off, so that it should be obtained. The trimming process of trimming a surplus part that does not need to be attached to the laminated product can be performed automatically and quickly without the need for a special device, thereby improving production efficiency and saving labor. be able to.

[Brief description of the drawings]

FIG. 1 is an overall schematic longitudinal sectional view showing an embodiment of an injection molding simultaneous painting apparatus according to the present invention.

FIG. 2 is a schematic plan view of a female mold used in the apparatus shown in FIG.

FIG. 3 is an enlarged view showing a main part of a female mold and a clamper of the apparatus shown in FIG. 1;

FIG. 4 is a perspective view showing a clamper of the device shown in FIG. 1;

FIG. 5 is an enlarged view of a main part used for explaining a clamping step and a trimming step of the apparatus shown in FIG. 1;

FIG. 6 is an enlarged view of a main part used for explaining a clamping step and a trimming step of the apparatus shown in FIG. 1;

FIG. 7 is an enlarged view of a main part showing another aspect of the trimming means according to the present invention.

FIG. 8 is an enlarged view of a main part showing another aspect of the trimming means according to the present invention.

[Explanation of symbols]

 S Painting sheet (transfer sheet) 1 Unwinding machine 10 Injection molding simultaneous painting apparatus 12 Female mold 13 Cavity 14 Parting surface 15 Vacuum suction hole 20 Clamper 20a Sheet pressing surface 26 Outer recess 30 Male mold 41 Annular cutting blade 42 Cutting tool receiving Part 45 Annular cutting blade 46 Elastic member as annular cutting blade 61 Heating line 62 Cutting tool receiving part

Claims (6)

[Claims] 1. A male / female forming die, a sheet supply means for supplying one shot of a painted sheet on the parting surface of the female mold, and pressing and fixing the supplied painted sheet on the parting surface. And a clamping means which is moved forward and backward with respect to the parting surface in order to perform the simultaneous molding by injection molding, wherein it is necessary to accompany the laminated product to be obtained among the painted sheets supplied on the parting surface. A simultaneous trimming device for injection molding, wherein trimming means is provided for trimming a surplus portion that does not exist by using the press-fixing operation of the clamped means. 2. The simultaneous painting apparatus for injection molding according to claim 1, wherein a laminate sheet is used as the painting sheet. 3. When the painting sheet is pressed and fixed to the female parting surface by the clamping means, an O-ring is provided on the parting surface so as to hermetically shut off the cavity from the outside. At the time of the painting sheet pressing and fixing operation, a part of the painting sheet is mounted so as to protrude from the parting surface so as to be compressed by the clamping means with the painting sheet therebetween, and the female parting surface is And one of the clamping means, as the trimming means for cutting out the surplus portion of the painting sheet at the same time as or after the painting sheet is clamped by the clamping means and the O-ring during the painting sheet pressing and fixing operation. And a cutting tool receiving portion such as a groove for receiving the cutting tool is provided on the other side. The injection molding simultaneous painting apparatus according to claim 1 or 2, wherein 4. The simultaneous injection molding and painting apparatus according to claim 1, wherein the cutting tool is an annular blade such as a Thomson blade. 5. The simultaneous injection molding and painting apparatus according to claim 1, wherein the cutting tool is an annular heating wire made of a heating wire such as a nichrome wire. 6. The cutting tool is provided at a position recessed from a sheet pressing surface portion of the clamping means, and the cutting tool receiving portion is provided at a position protruding from the female parting surface. An injection molding simultaneous painting apparatus according to any one of claims 1 to 5.