JP2000043085A - Preform mold and production of film insert molded product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent hooking of the tonguelike film part of a three-dimensional film shaped clamp plate with the frame of a frame-shaped clamp plate. SOLUTION: In a preform mold having the clamp plate 4 pressing the film 2 introduced into the preform mold capable of obtaining a three-dimensional film by squeezing the film 2 into a preform recessed surface 3 to the predetermined place of the periphery of the preform recessed surface 3, the clamp plate 4 is opened and closed like a door. The clamp plate 4 consists of a lower frame- shaped member and an upper member for preliminarily holding the film in an annular shape before pressing the film 2 introduced into the preform mold to the predetermined place of the periphery of a preform projected surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a preform mold for preforming a film used for producing interior / exterior panels of automobiles and electric appliances by a method for producing a film insert molded product. The present invention relates to a method for manufacturing a film insert molded product.

[0002]

2. Description of the Related Art Conventionally, a film preformed into a predetermined three-dimensional shape (hereinafter, referred to as a "three-dimensional film") is obtained by using a preform die different from an injection molding die. There is a method of manufacturing a so-called film insert molded product by fitting a mold into a cavity forming concave surface of an injection molding mold, closing the injection molding mold, injecting a molten resin into the cavity, and integrating the molded product and the three-dimensional film. .

In order to obtain the three-dimensional film by using a preform mold different from the injection mold, the following is performed. First, a picture film is introduced into a preform mold. A preform concave surface or a preform convex surface is formed in the preform mold, and a clamp plate is provided at a predetermined position around the preform concave surface or the preform convex surface to sandwich the picture film in a ring shape. Have been. The introduction is performed so as to be inserted into the gap between the clamp plate and the preform mold. The introduced design film is arranged so as to cover the preform concave surface or the preform convex surface of the preform mold, and a predetermined shape around the preform concave surface or the preform convex surface is used as a design film with a frame-shaped clamp plate. Hold down. Next, by compressed air or vacuum suction method, by squeezing the pattern film to the inner surface of the preform concave surface or by covering the preform convex surface,
A three-dimensional film having a tongue-like film part is obtained. next,
Pull up the clamp plate just above the concave part for the preform or the predetermined part around the convex part for the preform to release the tongue-like film part located on the parting surface, and then put the three-dimensional film together with the tongue-like film part Through the inside of the frame of the frame-shaped clamp plate.

[0004]

(1) However, in the prior art, when the three-dimensional film passes through the inside of the frame of the frame-shaped clamp plate, the tongue-shaped film portion is caught or collides with the frame of the frame-shaped clamp plate. Or For this reason, the film may be torn, or a part of the three-dimensional portion of the film may be deformed by being dented or bent. Therefore, conventionally, the yield rate of the three-dimensional film was poor.

(2) There is a case where the three-dimensional film portion is cut off from the tongue-like film portion while the tongue-like film portion of the picture film is kept pressed by the clamp plate at a predetermined position around the concave surface for the preform. . In this case, only the donut-shaped toroidal film portion having the hole formed therein remains on the back side of the clamp plate. In order to grasp the donut-shaped tongue-shaped film portion and remove it from the back surface of the clamp plate, pull it out of the gap between the clamp plate and the mold for preform or pass through the inside of the frame of the frame-shaped clamp plate. It is possible to make it. However, in the former case, it is difficult to grasp the tongue-like film portion because the gap is narrow, and therefore it is difficult to pull out the film. In the latter case, the tongue-like film portion is caught or collides with the frame of the frame-shaped clamp plate, and is therefore difficult to remove. Furthermore, when a mold having a preform convex surface is used as a preform mold, the convex surface is damaged because the hole of the tongue-shaped film portion is caught or collides with the convex surface. As described above, it was difficult to remove the tongue-like film portion, the production efficiency was poor, and the preform mold was easily damaged.

(3) In the prior art, the film is introduced so as to be inserted into the gap between the clamp plate and the mold for preform. However, the introduction for grasping the edge of the film and dragging the film into the gap. When a member is used, the width of the passage needs to be widened by the size of the introduction member. In order to prevent the introduction member from contacting the clamp member or the mold surface (particularly, the convex surface of the preform) and damaging each other, it is necessary to reduce the size of the introduction member or to prevent the introduction member from contacting the clamp member or the mold. It is necessary to prepare a complicated and expensive device for precisely setting the path of the introduction member so as to proceed to the above. The present invention relates to a preform die for the purpose of improving the yield rate and production efficiency of a three-dimensional film.

[0007]

In order to solve the above-mentioned problems, a preform mold according to the present invention is capable of obtaining a three-dimensional film by narrowing a film on a concave surface of the preform. In a preform mold having a clamp plate that presses the film introduced into the inside of the concave portion for the preform at a predetermined position, the clamp plate can be opened and closed like a door.

[0008] The preform mold of the present invention comprises:
A three-dimensional film can be obtained by coating a film on the preform convex surface. A preform metal having a clamp plate for pressing a film introduced into a preform die into a predetermined portion around the preform convex surface. In the mold, the clamp plate may be capable of being opened and closed like a door.

Further, the preform mold of the present invention comprises:
The clamp member may have a double door structure.

[0010] The mold for preform of the present invention comprises:
Clamp plate is composed of a lower frame-shaped member and an upper member for sandwiching the film in advance before pressing the film introduced into the preform mold into a predetermined portion around the preform convex surface, The upper member may be capable of being opened and closed like a door.

The method for producing a film insert molded product according to the present invention is characterized in that a three-dimensional film obtained by preforming using any of the preform molds described above is placed on a concave surface for forming a cavity of an injection mold. Fit, close the mold,
A method of manufacturing a film insert molded product in which molten resin is injected from the injection gate into the cavity to integrate the molded product and the film may be used.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preform mold according to the present invention will be described with reference to the drawings.

The preform mold of the present invention comprises a clamp plate 4 for pressing the film 2 introduced into the preform mold 1 at a predetermined position around the preform concave surface 3.
In the preform mold having the above, the clamp plate is opened and closed like a door.

As an example, the preform mold 1 includes a preform concave surface 3 and a vacuum suction port 7 (formed on the preform concave surface 3 or the film pressing surface 8) and two flat cores. Some have a clamp plate 4 having a shape (see FIGS. 1 to 3 and FIG. 7). The two flat U-shaped clamp plates 4 may have a double-open structure (see FIGS. 1 to 3 and FIG. 7). As another example, a convex surface 1 for a preform
7, a vacuum suction port 7, two upper U-shaped upper members 21 and a lower frame-shaped member 20 (see FIGS. 8 to 16). The upper member 21 and the lower frame-shaped member 20 hold the film 2 before pressing the film introduced into the preform mold to a predetermined position around the convex surface for the preform.
Is to be sandwiched in a ring. The upper member 21
A double door structure may be used.

As means for opening and closing the clamp plate 4 like a door, two rotating shaft portions 11 and 110 provided at the rear end of the clamp plate 4 and a trunnion type air cylinder 12 provided on a mold, etc. It is preferable that one rotating shaft 11 of the clamp plate 4 is fixed to the tip end 120 of the trunnion-type air cylinder 12 and the other rotating shaft 110 is fixed to a mold. In order to press the film 2, the front end 120 of the trunnion type air cylinder 12 is protruded to raise the rear end of the clamp plate 4, and the entire clamp plate 4 is rotated about the rotating shaft 110 to rotate the film pressing surface 8. The film 2 is preferably pressed against the film pressing surface 8 (FIGS. 1 to 3).
3 and 6 to 16). To release the film 2, the rear end of the clamp plate 4 is pulled down by retracting the front end 120 of the trunnion-type air cylinder 12, and the entire clamp plate 4 is rotated about the rotation shaft 110 and the parting surface 8 is moved from the parting surface 8. It is preferable that the film 2 is moved so as to be separated and the film 2 is released from the film pressing surface 8 (see FIGS. 1 to 3 and FIGS. 6 to 16).

The clamp plate 4 may be composed of one member or may be composed of two or more members. In the latter case, in a clamped state (a state in which the film 2 is pressed against the film pressing surface 8 by the clamp plate 4), even if the members are in contact with each other to form a frame, the members are arranged in a non-contact state. The structure may be a flat D-shape or a flat U-shape. When the members are in contact with each other, the structure may be such that the end faces are in contact, or the structure may be such that a part of the members overlap each other. The most basic structure of a clamp plate composed of two or more members is composed of two planar U-shaped members which are in a U-shape in a clamped state, and these two members are open right and left. It is. Further, as another example, it is composed of two planar L-shaped members and one planar U-shaped member that become a flat rectangular shape in a clamped state, and when the mold is opened, the planar L-shaped members respectively There is a structure that moves to the upper left and upper right, and the U-shaped member moves downward and opens like a door. Also, 2
In the case of a clamp plate composed of two or more members, a structure in which two or more members move simultaneously or a structure in which a time lag is caused to move may be used. In each of the above examples, the members constituting the clamp plate 4 may be foldable.

The film 2 is a so-called insert film in which a pattern layer, an adhesive layer, and the like are sequentially laminated on a base sheet, and the base sheet is not peeled off after the molding resin is adhered to the film 2. There is. Alternatively, as the film 2, a release layer, a picture layer, an adhesive layer, and the like are sequentially laminated on a base sheet,
There is a so-called transfer film in which the base sheet is peeled off after the molding resin adheres to the film 2. Examples of the material of the base sheet include various resins such as polyethylene terephthalate, polypropylene, acrylic, and thermoplastic elastomer, or a cloth or a nonwoven fabric knitted with various fibers. The picture layer is a layer that imparts decorativeness and functionality to the surface of the molded article 9. The picture layer includes a normal printed pattern and a conductive pattern formed of a conductive material. The picture layer uses a resin binder and a pigment or a dye. The picture layer may use a resin binder and a metal pigment having a concealing property or other inorganic pigments. The picture layer may be composed of a metal vapor-deposited layer to give a metallic luster. The adhesive layer is a layer for bonding the film 2 and the molded product 6. For the adhesive layer, a heat-sensitive or pressure-sensitive resin suitable for the material of the molding resin is appropriately used.
For example, when the molding resin is an acrylic resin or a urethane resin, a vinyl chloride-vinyl acetate copolymer resin or an acrylic resin may be used as the adhesive layer. The picture layer and the adhesive layer are formed by various printing methods. The adhesive layer may use a resin film.

One embodiment of the method of using the preform mold according to the present invention will be described with reference to the drawings.

First, the film with picture 2 is introduced to a position covering the concave surface 3 for preform of the mold 1 for preform (see FIGS. 1, 8 and 14). In FIG. 1, the sheet-like film 2 may be fed from the front of the mold toward the back to a position covering the concave surface 3 for preform, or the film 33 may be unwound from a roll 33 and unwound for preform. It may be pulled to a position that covers the concave surface 3 and the play surface convex surface 17 (see FIGS. 13 and 14). As the introduction device, an introduction member 31 for grasping an end of the film 2, a rod 32 for supporting the introduction member, and the end of the introduced film 2 are temporarily fixed to a preform mold until the introduced film 2 is clamped. And a temporary fixing member 34.

Next, by closing the clamp plate 4 like a door, the film 2 is pressed to a predetermined portion around the preform concave surface 3 or the preform convex surface 17 (see FIGS. 2, 9 and 11). ).

The film 2 introduced into the mold for preform is clamped by the clamp plate 4 so that the convex surface 17 for preform is used.
In the case where the lower frame-shaped member 20 and the upper member 21 for sandwiching the film 2 in advance before being pressed to a predetermined location around the upper part 21 are first closed by closing the upper member 21 like a door, The film 2 is moved to the lower frame member 20
(See FIGS. 9, 14 and 15). Next, the upper member 2 is
The portion of the film 2 protruding outside the portion 1 may be cut off (see FIG. 16). Then, while heating the film 2 with the film heating device 23 having the heat radiating portion 24, the upper member 21 and the lower frame-shaped member 20 are lowered, and the film 2 is pressed to a predetermined position around the preform convex surface 17. (See FIGS. 9 and 10). Further, the film 2 may be cut into the three-dimensional portion 130 and the tongue-shaped film portion 13 in the frame hole of the upper member 21 (see FIG. 11). In this case, only the necessary portion of the film 2 preformed in a predetermined shape can be taken out of the preform mold without opening the upper member 21. Under the upper member 21, the tongue-like film portion 13 in which the hole 14 is formed remains (see FIG. 7).

When two flat U-shaped members are used as the clamp plate 4, it is preferable to close the double door. The two members are combined into one frame-shaped clamp plate (see FIGS. 2 and 7). With this frame-shaped clamp plate, film 2
Is pressed around the preform concave surface 3 of the mold.
If necessary, simultaneously with or after the pressing, unnecessary portions of the film 2 outside the frame of the frame-shaped clamp plate may be removed by a cutting device 35 such as a heat cutter (FIG. 1).
5, see FIG. 16). If necessary, the film 2 may be heated by injecting the film heating device 23 above the preform concave surface 3 or the preform convex surface 17 as a separate step from the introduction of the film 2 (see FIGS. 9 and 10). ). Thereafter, if necessary, the space between the concave surface 3 for preform or the convex surface 17 for preform and the film 2 is suctioned by vacuum, and the film 2 is adhered to the inner surface of the concave surface 3 for preform or the outer surface of the convex surface 17 for preform. (See FIGS. 2 and 10).

Next, the clamp plate 4 is opened like a door, and the film 2 preformed into a desired three-dimensional shape is taken out from the concave surface 3 for preform or the convex surface 17 for preform (see FIGS. 3 and 12). In other words, the two U-shaped flat clamp plates 4 may be used to open the double door. When the clamp plate 4 is separated from the preform concave surface 3 or the preform convex surface 17, the tongue-like film portion 13 of the film 2 is released. The film preformed into a predetermined three-dimensional shape is taken out from the concave surface 3 for preform or the convex surface 17 for preform. It should be noted that the clamp plate 4 is used for the film 2 introduced into the preform mold.
Frame member 2 for sandwiching film 2 in advance before pressing the film 2 at a predetermined location around convex surface 17 for preform.
In the case of a structure composed of 0 and the upper member 21, first,
By opening the upper member 21 like a door, the tongue-like film portion 13 of the film 2 is released (FIG. 1).
2). The lower frame-shaped member 20 may be in close contact with the preform mold. In the frame hole of the upper member 21, the film 2 and the tongue-like film portion 1
In the case of cutting the preform die 3, the tongue-shaped film portion 13 in which the hole 14 is formed is taken out from the preform mold (see FIG. 12). Since the clamp plate 4 opens like a door, the clamp plate 4 can be moved to a predetermined location around the concave surface 3 for a preform and directly above and outside the location. As a result, when removing the tongue-shaped film portion 13 in which the hole 14 is formed, it is possible to prevent the contact with the preform convex surface 17 at all. Further, it is possible to press the film 2 with the frame-shaped clamp plate 4 over the limit of the edge of the preform concave surface 3 in the film pressing surface 8. In this way, the area of the unnecessary tongue-like film portion 13 can be reduced, and the width of the film 2 prepared in advance can be minimized, and the waste of the film 2 can be reduced as much as possible.

The thus obtained film is formed by fitting the preformed film into the cavity forming concave surface 16 of the movable mold 6 of the injection mold composed of the movable mold 6 and the fixed mold 5. The mold is closed (see FIG. 4), the molten resin 10 is injected into the cavity from the injection gate 15, and the molded article 9 and the film 2 are integrated (see FIG. 5).

[0025]

According to the preform mold of the present invention, there is provided a preform mold having a clamp plate for pressing a film introduced into the preform mold at a predetermined position around a concave surface of the preform. The clamp plate can be opened and closed like a door. In addition, the method of manufacturing a film insert molded product, a three-dimensional film obtained by preforming using any of the preform mold,
The injection molding die was fitted into the concave surface for forming a cavity, the die was closed, molten resin was injected into the cavity from the injection gate, and the molded product and the film were integrated. Therefore, the following effects are obtained.

(1) That is, it is not necessary for the three-dimensional film to pass through the inside of the frame of the frame-shaped clamp plate, so that the tongue-like film portion of the three-dimensional film does not come into contact with the clamp plate at all. it can. As a result, the case where the film is torn or the case where the three-dimensional portion of the film is dented or bent and deformed are eliminated.
Therefore, the yield rate of the three-dimensional film is improved.

(2) Even when removing the donut-shaped toroidal film portion after the three-dimensional film is cut off, the toroidal film portion may be removed from the gap between the clamp plate and the preform mold, or may be removed from the frame. Since there is no need to pass through the inside of the frame of the clamp plate, the tongue-like film portion can be easily grasped and pulled out. Also, since the tongue-shaped film does not catch or collide with the frame of the frame-shaped clamp plate,
Easy to remove. Furthermore, when using a mold having a preform convex surface as the preform mold, it is possible to avoid that the punched hole portion of the tongue-shaped film portion is caught or collides with the side of the convex surface. There is no side damage. As described above, it is easy to remove the tongue-like film part and the production efficiency is improved,
The preform mold is not damaged.

(3) Even in the case of using an introduction member that grips the end of the film and drags the film between the molds, the width of the path of the introduction member can be widened, and it is necessary to make the introduction member smaller than necessary. Further, a complicated and expensive device for precisely setting the movement path of the introduction member is not required.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing one embodiment of a method for manufacturing a preform mold and a film insert molded product according to the present invention and one process of using the same.

FIG. 2 is a cross-sectional view showing one embodiment of a method for producing a preform mold and a film insert molded product according to the present invention and one process of using the same.

FIG. 3 is a cross-sectional view showing one embodiment of a method for producing a preform mold and a film insert molded product according to the present invention and one step of a method of using the same.

FIG. 4 is a cross-sectional view showing one step of the method for producing a film insert molded product of the present invention.

FIG. 5 is a cross-sectional view showing one step of the method for manufacturing a film insert molded product of the present invention.

FIG. 6 is a plan view showing one embodiment of a method for manufacturing a preform mold and a film insert molded product according to the present invention and one process of using the same.

FIG. 7 is a plan view showing one embodiment of a method for producing a preform mold and a film insert molded product according to the present invention and one process of using the same.

FIG. 8 is a cross-sectional view showing one embodiment of a method for producing a mold for a preform and a film insert molded product of the present invention and one step of a method of using the same.

FIG. 9 is a cross-sectional view showing one embodiment of a method for manufacturing a preform mold and a film insert molded product according to the present invention and one process of using the same.

FIG. 10 is a cross-sectional view showing one embodiment of a method for producing a mold for a preform and a film insert molded product of the present invention and one step of a method of using the same.

FIG. 11 is a cross-sectional view showing one embodiment of a method for manufacturing a preform mold and a film insert molded product according to the present invention and one process of using the same.

FIG. 12 is a cross-sectional view showing one embodiment of a method for manufacturing a mold for a preform and a film insert molded product according to the present invention and a step of a method of using the same.

FIG. 13 is a cross-sectional view showing one embodiment of a method for producing a mold for a preform and a film insert molded product of the present invention and one step of a method of using the same.

FIG. 14 is a cross-sectional view showing one embodiment of a method for producing a mold for a preform and a film insert molded product of the present invention and one step of a method of using the same.

FIG. 15 is a cross-sectional view showing one embodiment of a method for producing a preform mold and a film insert molded product according to the present invention, and a process of using the same.

FIG. 16 is a cross-sectional view showing one embodiment of a method for producing a preform mold and a film insert molded product according to the present invention and one step of a method of using the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Preform die 2 Film 3 Preform concave surface 4 Clamp plate 5 Fixed type 6 Movable type 7 Vacuum suction port 8 Film pressing surface 9 Molded product 10 Molten resin 11 Rotation shaft part 110 Rotation shaft part 12 Trunnion type air cylinder Reference Signs List 120 Tip portion 13 Velo film portion 14 Drill hole 15 Injection gate 16 Cavity forming concave surface 17 Preform convex surface 20 Lower frame member 200 Frame hole 21 Upper member 22 Pull-in rod 23 Film heating device 24 Heat radiating portion 25 Laser cut Apparatus 26 Laser beam 30 Film introduction device 31 Introduction member 32 Rod 33 Rolled up 34 Temporary fixing member 35 Cutting device

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[Procedure amendment]

[Submission date] October 4, 1999 (1999.10.
4)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

Patent application title: Method for producing preform mold and film insert molded product

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a preform mold for preforming a film used for producing interior / exterior panels of automobiles and electric appliances by a method for producing a film insert molded product. The present invention relates to a method for manufacturing a film insert molded product.

[0002]

2. Description of the Related Art Conventionally, a film preformed into a predetermined three-dimensional shape (hereinafter, referred to as a "three-dimensional film") is obtained by using a preform die different from an injection molding die. There is a method of manufacturing a so-called film insert molded product by fitting a mold into a cavity forming concave surface of an injection molding mold, closing the injection molding mold, injecting a molten resin into the cavity, and integrating the molded product and the three-dimensional film. .

In order to obtain the three-dimensional film by using a preform mold different from the injection mold, the following is performed. First, a picture film is introduced into a preform mold. A preform concave surface or a preform convex surface is formed in the preform mold, and a clamp plate is provided at a predetermined position around the preform concave surface or the preform convex surface to sandwich the picture film in a ring shape. Have been. The introduction is performed so as to be inserted into the gap between the clamp plate and the preform mold. The introduced design film is arranged so as to cover the preform concave surface or the preform convex surface of the preform mold, and a predetermined shape around the preform concave surface or the preform convex surface is used as a design film with a frame-shaped clamp plate. Hold down. Next, by compressed air or vacuum suction method, by squeezing the pattern film to the inner surface of the preform concave surface or by covering the preform convex surface,
A three-dimensional film having a tongue-like film part is obtained. next,
Pull up the clamp plate just above the concave part for the preform or the predetermined part around the convex part for the preform to release the tongue-like film part located on the parting surface, and then put the three-dimensional film together with the tongue-like film part Through the inside of the frame of the frame-shaped clamp plate.

[0004]

(1) However, in the prior art, when the three-dimensional film passes through the inside of the frame of the frame-shaped clamp plate, the tongue-shaped film portion is caught or collides with the frame of the frame-shaped clamp plate. Or For this reason, the film may be torn, or a part of the three-dimensional portion of the film may be deformed by being dented or bent. Therefore, conventionally, the yield rate of the three-dimensional film was poor.

(2) There is a case where the three-dimensional film portion is cut off from the tongue-like film portion while the tongue-like film portion of the picture film is kept pressed by the clamp plate at a predetermined position around the concave surface for the preform. . In this case, only the donut-shaped toroidal film portion having the hole formed therein remains on the back side of the clamp plate. In order to grasp the donut-shaped tongue-shaped film portion and remove it from the back surface of the clamp plate, pull it out of the gap between the clamp plate and the mold for preform or pass through the inside of the frame of the frame-shaped clamp plate. It is possible to make it. However, in the former case, it is difficult to grasp the tongue-like film portion because the gap is narrow, and therefore it is difficult to pull out the film. In the latter case, the tongue-like film portion is caught or collides with the frame of the frame-shaped clamp plate, and is therefore difficult to remove. Furthermore, when a mold having a preform convex surface is used as a preform mold, the convex surface is damaged because the hole of the tongue-shaped film portion is caught or collides with the convex surface. As described above, it was difficult to remove the tongue-like film portion, the production efficiency was poor, and the preform mold was easily damaged.

(3) In the prior art, the film is introduced so as to be inserted into the gap between the clamp plate and the mold for preform. However, the introduction for grasping the edge of the film and dragging the film into the gap. When a member is used, the width of the passage needs to be widened by the size of the introduction member. In order to prevent the introduction member from contacting the clamp member or the mold surface (particularly, the convex surface of the preform) and damaging each other, it is necessary to reduce the size of the introduction member or to prevent the introduction member from contacting the clamp member or the mold. It is necessary to prepare a complicated and expensive device for precisely setting the path of the introduction member so as to proceed to the above. The present invention relates to a preform die for the purpose of improving the yield rate and production efficiency of a three-dimensional film.

[0007]

In order to solve the above-mentioned problems, a preform mold according to the present invention is capable of obtaining a three-dimensional film by narrowing a film on a concave surface of the preform. In a preform mold having a clamp plate that presses a film introduced into a predetermined portion around a concave surface for a preform, the preform mold is rotated around a rotation shaft to be in close contact with a film pressing surface or a film pressing surface. The clamp plate can be moved so that the clamp plate can be separated from the clamp plate.

[0008] The preform mold of the present invention comprises:
A three-dimensional film can be obtained by coating a film on the preform convex surface. A preform metal having a clamp plate for pressing a film introduced into a preform die into a predetermined portion around the preform convex surface. The mold may be such that the clamp plate can be moved so that it can be rotated about the rotating shaft and brought into close contact with the film pressing surface or separated from the film pressing surface.

Further, the preform mold of the present invention comprises:
The clamp member may have a double door structure.

[0010] The mold for preform of the present invention comprises:
Clamp plate is composed of a lower frame-shaped member and an upper member for sandwiching the film in advance before pressing the film introduced into the preform mold into a predetermined portion around the preform convex surface, The upper member may be movable so that the upper member can be rotated around the rotation shaft and brought into close contact with the film pressing surface or separated from the film pressing surface.

The method for producing a film insert molded product according to the present invention is characterized in that a three-dimensional film obtained by preforming using any of the preform molds described above is placed on a concave surface for forming a cavity of an injection mold. Fit, close the mold,
A method of manufacturing a film insert molded product in which molten resin is injected from the injection gate into the cavity to integrate the molded product and the film may be used.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preform mold according to the present invention will be described with reference to the drawings.

The preform mold of the present invention comprises a clamp plate 4 for pressing the film 2 introduced into the preform mold 1 at a predetermined position around the preform concave surface 3.
In this case, the clamp plate is moved so that it can be rotated about the rotating shaft and brought into close contact with the film pressing surface or separated from the film pressing surface.

As an example, the preform mold 1 includes a preform concave surface 3 and a vacuum suction port 7 (formed on the preform concave surface 3 or the film pressing surface 8) and two flat cores. Some have a clamp plate 4 having a shape (see FIGS. 1 to 3 and FIG. 7). The two flat U-shaped clamp plates 4 may have a double-open structure (see FIGS. 1 to 3 and FIG. 7). As another example, a convex surface 1 for a preform
7, a vacuum suction port 7, two upper U-shaped upper members 21 and a lower frame-shaped member 20 (see FIGS. 8 to 16). The upper member 21 and the lower frame-shaped member 20 hold the film 2 before pressing the film introduced into the preform mold to a predetermined position around the convex surface for the preform.
Is to be sandwiched in a ring. The upper member 21
A double door structure may be used.

The means for moving the clamp plate 4 is provided at the rear end of the clamp plate 4 so that the clamp plate 4 can be rotated so as to rotate about the rotation shaft portion so as to be in close contact with the film pressing surface or to be separated from the film pressing surface. And a trunnion-type air cylinder 12 provided on a mold. One of the rotation shafts 11 of the clamp plate 4 is attached to a tip 120 of the trunnion-type air cylinder 12. It is good to fix, and the other rotating shaft part 110 is fixed to a metal mold. In order to press the film 2, the front end 120 of the trunnion type air cylinder 12 is protruded to raise the rear end of the clamp plate 4, and the entire clamp plate 4 is rotated about the rotating shaft 110 to rotate the film pressing surface 8. The film 2 is pressed against the film pressing surface 8 (FIGS. 1 to 3,
6 to 16). To release the film 2, the rear end of the clamp plate 4 is pulled down by retracting the front end 120 of the trunnion-type air cylinder 12, and the entire clamp plate 4 is rotated about the rotation shaft 110 and the parting surface 8 is moved from the parting surface 8. Move so as to separate the film 2
Should be released from the film holding surface 8 (FIGS. 1 to 1).
3 and 6 to 16).

The clamp plate 4 may be composed of one member or may be composed of two or more members. In the latter case, in a clamped state (a state in which the film 2 is pressed against the film pressing surface 8 by the clamp plate 4), even if the members are in contact with each other to form a frame, the members are arranged in a non-contact state. The structure may be a flat D-shape or a flat U-shape. When the members are in contact with each other, the structure may be such that the end faces are in contact, or the structure may be such that a part of the members overlap each other. The most basic structure of a clamp plate composed of two or more members is composed of two planar U-shaped members which are in a U-shape in a clamped state, and these two members are open right and left. It is. Further, as another example, it is composed of two planar L-shaped members and one planar U-shaped member that become a flat rectangular shape in a clamped state, and when the mold is opened, the planar L-shaped members respectively There is a structure that moves to the upper left and upper right, and the U-shaped flat member can be rotated about the rotation shaft portion to be in close contact with the film pressing surface or to be separated from the film pressing surface. In the case of a clamp plate composed of two or more members,
A structure in which two or more members move at the same time, or a structure in which a time lag is caused to move may be used. In each of the above examples, the members constituting the clamp plate 4 may be foldable.

The film 2 is a so-called insert film in which a pattern layer, an adhesive layer, and the like are sequentially laminated on a base sheet, and the base sheet is not peeled off after the molding resin is adhered to the film 2. There is. Alternatively, as the film 2, a release layer, a picture layer, an adhesive layer, and the like are sequentially laminated on a base sheet,
There is a so-called transfer film in which the base sheet is peeled off after the molding resin adheres to the film 2. Examples of the material of the base sheet include various resins such as polyethylene terephthalate, polypropylene, acrylic, and thermoplastic elastomer, or a cloth or a nonwoven fabric knitted with various fibers. The picture layer is a layer that imparts decorativeness and functionality to the surface of the molded article 9. The picture layer includes a normal printed pattern and a conductive pattern formed of a conductive material. The picture layer uses a resin binder and a pigment or a dye. The picture layer may use a resin binder and a metal pigment having a concealing property or other inorganic pigments. The picture layer may be composed of a metal vapor-deposited layer to give a metallic luster. The adhesive layer is a layer for bonding the film 2 and the molded product 6. For the adhesive layer, a heat-sensitive or pressure-sensitive resin suitable for the material of the molding resin is appropriately used.
For example, when the molding resin is an acrylic resin or a urethane resin, a vinyl chloride-vinyl acetate copolymer resin or an acrylic resin may be used as the adhesive layer. The picture layer and the adhesive layer are formed by various printing methods. The adhesive layer may use a resin film.

One embodiment of the method of using the preform mold according to the present invention will be described with reference to the drawings.

First, the film with picture 2 is introduced to a position covering the concave surface 3 for preform of the mold 1 for preform (see FIGS. 1, 8 and 14). In FIG. 1, the sheet-like film 2 may be fed from the front of the mold toward the back to a position covering the concave surface 3 for preform, or the film 33 may be unwound from a roll 33 and unwound for preform. It may be pulled to a position that covers the concave surface 3 and the play surface convex surface 17 (see FIGS. 13 and 14). As the introduction device, an introduction member 31 for grasping an end of the film 2, a rod 32 for supporting the introduction member, and the end of the introduced film 2 are temporarily fixed to a preform mold until the introduced film 2 is clamped. And a temporary fixing member 34.

Next, the film 2 is rotated around the rotation shaft and the clamp plate 4 is moved so as to be in close contact with the film pressing surface, so that the film 2 is turned into the preform concave surface 3.
Alternatively, it is pressed to a predetermined location around the preform convex surface 17 (see FIGS. 2, 9, and 11).

The film 2 introduced into the mold for preform is clamped by the clamp plate 4 so that the convex surface 17 for preform is used.
In the case where the lower frame-shaped member 20 and the upper member 21 for sandwiching the film 2 in advance before being pressed to a predetermined portion around the film are first rotated around the rotation shaft portion and the film pressing surface By moving the upper member 21 so that the film 2 is in close contact with the lower frame member 20, the film 2 is pressed to a predetermined position around the frame hole 200 of the lower frame member 20 (see FIGS. 9, 14 and 15). Next, the portion of the film 2 protruding outside the upper member 21 may be cut off by the separating device 35 (see FIG. 16). Then, while heating the film 2 with the film heating device 23 having the heat radiating portion 24,
The upper member 21 and the lower frame-shaped member 20 may be lowered to press the film 2 to a predetermined location around the preform convex surface 17 (see FIGS. 9 and 10). Also, the upper member 2
In the frame hole 1, the film 2 is placed in the three-dimensional portion 13.
0 and the tongue-shaped film portion 13 (FIG. 1).
1). In this case, only the necessary portion of the film 2 preformed in a predetermined shape can be taken out of the preform mold without opening the upper member 21. Under the upper member 21, the tongue-like film portion 13 in which the hole 14 is formed remains (see FIG. 7).

When two flat U-shaped members are used as the clamp plate 4, it is preferable to close the double door. The two members are combined into one frame-shaped clamp plate (see FIGS. 2 and 7). With this frame-shaped clamp plate, film 2
Is pressed around the preform concave surface 3 of the mold.
If necessary, simultaneously with or after the pressing, unnecessary portions of the film 2 outside the frame of the frame-shaped clamp plate may be removed by a cutting device 35 such as a heat cutter (FIG. 1).
5, see FIG. 16). If necessary, the film 2 may be heated by injecting the film heating device 23 above the preform concave surface 3 or the preform convex surface 17 as a separate step from the introduction of the film 2 (see FIGS. 9 and 10). ). Thereafter, if necessary, the space between the concave surface 3 for preform or the convex surface 17 for preform and the film 2 is suctioned by vacuum, and the film 2 is adhered to the inner surface of the concave surface 3 for preform or the outer surface of the convex surface 17 for preform. (See FIGS. 2 and 10).

Next, the clamp plate 4 is moved so that the film 2 is rotated around the rotation shaft and is separated from the film pressing surface, and the film 2 preformed into a desired three-dimensional shape is subjected to the preform concave surface 3 or the preform. It is taken out from the convex surface 17 for use (see FIGS. 3 and 12). In other words, the two U-shaped flat clamp plates 4 may be used to open the double door. When the clamp plate 4 is separated from the preform concave surface 3 or the preform convex surface 17, the tongue-like film portion 13 of the film 2 is released. A film preformed into a predetermined three-dimensional shape is formed into a concave surface 3 for preform.
Or it is taken out from the preform convex surface 17. In addition, before the clamp plate 4 presses the film 2 introduced into the mold for preform to a predetermined location around the convex surface 17 for preform, the lower frame-shaped member 20 and the upper In the case of the film 2, the tongue-like film portion 13 of the film 2 is first released by rotating the rotation member around the rotation shaft portion and moving the upper member 21 so as to separate from the film pressing surface. (See FIG. 12). The lower frame-shaped member 20 may be in close contact with the preform mold. When the film 2 is cut in advance into the three-dimensional portion and the tongue-shaped film portion 13 in the frame hole of the upper member 21, the tongue-shaped film portion 13 in which the hole 14 is formed is taken out from the preform mold. (See FIG. 12). Since the clamp plate 4 rotates about the rotation shaft and moves so as to be separated from the film pressing surface, the clamp plate 4 can move to a predetermined location around the preform concave surface 3 and directly above and outside of the location. . As a result, when removing the tongue-shaped film portion 13 in which the hole 14 is formed, it is possible to prevent the contact with the preform convex surface 17 at all. In addition, the frame 2 is clamped by the frame-shaped clamp plate 4 at the full limit of the edge of the preform concave surface 3 in the film pressing surface 8.
Can be suppressed. In this way, the area of the unnecessary tongue-like film portion 13 can be reduced, and the width of the film 2 prepared in advance can be minimized, and the waste of the film 2 can be reduced as much as possible.

The thus obtained film is formed by fitting the preformed film into the cavity forming concave surface 16 of the movable mold 6 of the injection mold composed of the movable mold 6 and the fixed mold 5. The mold is closed (see FIG. 4), the molten resin 10 is injected into the cavity from the injection gate 15, and the molded article 9 and the film 2 are integrated (see FIG. 5).

[0025]

According to the preform mold of the present invention, there is provided a preform mold having a clamp plate for pressing a film introduced into the preform mold at a predetermined position around a concave surface of the preform. The clamp plate and the upper member can be moved so that they can be rotated about the rotation shaft and brought into close contact with the film pressing surface or separated from the film pressing surface. Further, in the method for producing a film insert molded product, a three-dimensional film obtained by preforming using any of the preform molds described above is fitted into the cavity forming concave surface of the injection mold, and the mold is closed. Then, the molten resin is injected from the injection gate into the cavity to integrate the molded product and the film. Therefore, the following effects are obtained.

(1) That is, it is not necessary for the three-dimensional film to pass through the inside of the frame of the frame-shaped clamp plate, so that the tongue-like film portion of the three-dimensional film does not come into contact with the clamp plate at all. it can. As a result, the case where the film is torn or the case where the three-dimensional portion of the film is dented or bent and deformed are eliminated.
Therefore, the yield rate of the three-dimensional film is improved.

(2) Even when removing the donut-shaped toroidal film portion after the three-dimensional film is cut off, the toroidal film portion may be removed from the gap between the clamp plate and the preform mold, or may be removed from the frame. Since there is no need to pass through the inside of the frame of the clamp plate, the tongue-like film portion can be easily grasped and pulled out. Also, since the tongue-shaped film does not catch or collide with the frame of the frame-shaped clamp plate,
Easy to remove. Furthermore, when using a mold having a preform convex surface as the preform mold, it is possible to avoid that the punched hole portion of the tongue-shaped film portion is caught or collides with the side of the convex surface. There is no side damage. As described above, it is easy to remove the tongue-like film part and the production efficiency is improved,
The preform mold is not damaged.

(3) Even in the case of using an introduction member that grips the end of the film and drags the film between the molds, the width of the path of the introduction member can be widened, and it is necessary to make the introduction member smaller than necessary. Further, a complicated and expensive device for precisely setting the movement path of the introduction member is not required.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing one embodiment of a method for manufacturing a preform mold and a film insert molded product according to the present invention and one process of using the same.

FIG. 2 is a cross-sectional view showing one embodiment of a method for producing a preform mold and a film insert molded product according to the present invention and one process of using the same.

FIG. 3 is a cross-sectional view showing one embodiment of a method for producing a preform mold and a film insert molded product according to the present invention and one step of a method of using the same.

FIG. 4 is a cross-sectional view showing one step of the method for producing a film insert molded product of the present invention.

FIG. 5 is a cross-sectional view showing one step of the method for manufacturing a film insert molded product of the present invention.

FIG. 6 is a plan view showing one embodiment of a method for manufacturing a preform mold and a film insert molded product according to the present invention and one process of using the same.

FIG. 7 is a plan view showing one embodiment of a method for producing a preform mold and a film insert molded product according to the present invention and one process of using the same.

FIG. 8 is a cross-sectional view showing one embodiment of a method for producing a mold for a preform and a film insert molded product of the present invention and one step of a method of using the same.

FIG. 9 is a cross-sectional view showing one embodiment of a method for manufacturing a preform mold and a film insert molded product according to the present invention and one process of using the same.

FIG. 10 is a cross-sectional view showing one embodiment of a method for producing a mold for a preform and a film insert molded product of the present invention and one step of a method of using the same.

FIG. 11 is a cross-sectional view showing one embodiment of a method for manufacturing a preform mold and a film insert molded product according to the present invention and one process of using the same.

FIG. 12 is a cross-sectional view showing one embodiment of a method for manufacturing a mold for a preform and a film insert molded product according to the present invention and a step of a method of using the same.

FIG. 13 is a cross-sectional view showing one embodiment of a method for producing a mold for a preform and a film insert molded product of the present invention and one step of a method of using the same.

FIG. 14 is a cross-sectional view showing one embodiment of a method for producing a mold for a preform and a film insert molded product of the present invention and one step of a method of using the same.

FIG. 15 is a cross-sectional view showing one embodiment of a method for producing a preform mold and a film insert molded product according to the present invention, and a process of using the same.

FIG. 16 is a cross-sectional view showing one embodiment of a method for producing a preform mold and a film insert molded product according to the present invention and one step of a method of using the same.

[Description of Signs] 1 Mold for preform 2 Film 3 Concave surface for preform 4 Clamp plate 5 Fixed type 6 Movable type 7 Vacuum suction port 8 Film holding surface 9 Molded product 10 Molten resin 11 Rotating shaft 110 Rotating shaft Reference Signs List 12 trunnion type air cylinder 120 tip end 13 tongue-shaped film portion 14 punching hole 15 injection gate 16 cavity forming concave surface 17 preform convex surface 20 lower frame member 200 frame hole 21 upper member 22 pull-in rod 23 film heating device 24 Heat radiating section 25 Laser cutting device 26 Laser beam 30 Film introduction device 31 Introduction member 32 Rod 33 Rolled up 34 Temporary fixing member 35 Cutting device

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B29L 31:34 (72) Inventor Toshikazu Kobe 3 Mibuhanaimachi, Nakagyo-ku, Kyoto, Kyoto Japan Photographic print stock In-company (72) Inventor Teruma Shin Yamamoto 3 Mibuhanai-cho, Nakagyo-ku, Kyoto, Japan JB13 JB19 JB22 JF05 JQ81

Claims (5)

[Claims] 1. A clamp plate which presses a film introduced into a preform mold to a predetermined position around the preform concave surface so that a three-dimensional film can be obtained by narrowing the film on the preform concave surface. A preform mold, wherein the clamp plate can be opened and closed like a door. 2. A clamp plate which presses a film introduced into a preform mold capable of obtaining a three-dimensional film by coating a film on the preform convex surface at a predetermined position around the preform convex surface. A preform mold having a clamp plate that can be opened and closed like a door. 3. The preform mold according to claim 1, wherein the clamp member has a double opening structure. 4. A lower frame-shaped member and an upper side for clamping a film in a ring before a clamp plate presses a film introduced into a mold for a preform to a predetermined portion around a convex surface for a preform. The preform mold according to claim 2 or 3, wherein the mold comprises a member, and the upper member can be opened and closed like a door. 5. A three-dimensional film obtained by preforming using the mold for preform according to any one of claims 1 to 4 is fitted into a concave surface for forming a cavity of a mold for injection molding, and the mold is closed. A method of manufacturing a film insert molded product by injecting a molten resin from an injection gate into a cavity and integrating the molded product and a film.