JP2000296533A - Production of molded product decorated simultaneously with molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a supply means and supply process, a film positioning means and a positioning process, a film fixing means and a fixing process. SOLUTION: With the first film 1 having a large area adhered temporarily to the second film 2 having a small area between an A mold 6 and a B mold 5 having a molten resin gate, the first film 1 is supplied in a mold so that the first film 1 becomes an A mold 6 side, the first film is positioned to cover a gate only by the first film 1, after mold clamping, the second film 2 is sucked to the B mold 5, and a molten resin injected from the gate is inserted between the first film 1 and the second film 2 which are adhered to each other temporarily to peel off the first film 1 from the second film 2 so that a molding decorated simultaneously with molding in which the first film 1 is laminated on the surface of the molding and the second film 2 is laminated on the back of the molding is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a simultaneously molded article in which a film is bonded to a molded article in a mold at the same time as molding a resin molded article. In particular, this is effective when separate films are bonded to the front and back surfaces of a molded product.

[0002]

2. Description of the Related Art Conventionally, for example, in order to obtain a decorative product in which different films are bonded to the front and back surfaces of a resin molded product, first,
A first film in which holes are not formed and a second film in which holes are formed in advance are prepared. Next, the first film is supplied to the mold A, aligned, fixed to the mold A by a clamp plate or the like on the mold A, and brought into close contact with the inner surface of the cavity recess of the mold A by vacuum suction means or the like. On the other hand, the second film is B
The second film is supplied to the mold and the hole of the second film is aligned with the molten resin gate of the B mold. Adhere to the surface. After closing the A mold and the B mold, the holes of the second film are passed through the molten resin so that the resin is injected into the cavity space and filled between the first film and the second film. There is something to do.

[0003]

However, conventionally, the first
Since the film and the second film were supplied to different molds respectively, two supply means and a supply step, two positioning means and a positioning step, two fixing means and a fixing step, and two vacuum suction means , A vacuum suction step was required, the entire apparatus became complicated, and the production efficiency was low.
The larger the required molded product, the larger the equipment such as feeding means, positioning means, and fixing means,
This problem was to become even more pronounced.

[0004]

Means for Solving the Problems In order to solve the above-mentioned problems, the method for manufacturing a simultaneously decorated decorative article according to the present invention is constituted as follows. While the first film and the second film are temporarily in close contact with each other between the A type and the B type having the molten resin gate, the first film is supplied into the mold so as to be on the A mold side, The first film covers the gate and the gas injection holes, but the second film is positioned so as not to cover the gate and the gas injection holes. After closing the mold, the second film is suction-adhered to the B-form. B between the first film and the second film
The first film and the second film are separated from each other in the cavity space by interrupting the gas injected from the mold, and then the molten resin is injected from the gate, and the first film is bonded to the surface of the molded product, and the back surface is formed. To obtain a simultaneously decorated decorative article having a second film bonded thereto.

[0005] While the first film and the second film are temporarily adhered between the A-type and the B-type having a molten resin gate, the first film is placed in the A-type mold so that the first film is on the A-mold side. After supplying, the first film covers the gate and the gas injection holes, but the second film is positioned so as not to cover the gate and the gas injection holes, and after closing the mold, the second film is brought into close contact with the B type by suction. After that, the first film and the second
The first film and the second film are separated from each other in the cavity space by interposing the molten resin injected from the gate between the films, and the first film is bonded to the surface of the molded product, and the second film is formed on the back surface. It was configured to obtain a molded simultaneous decorative article bonded.

[0006] While the first film and the second film having the through hole are temporarily brought into close contact between the A-type and the B-type having the molten resin gate, the first film is set on the A-mold side. After the second film is positioned so that the through hole of the second film coincides with the molten resin gate and the gas ejection hole, the mold is closed, and the second film is brought into close contact with the B mold by suction. The first film and the second film are separated from each other in the cavity space by causing the gas ejected from the gas ejection hole of the above and passing through the through hole to be interposed between the first film and the second film, and then melted from the gate. Inject resin,
The first film was bonded to the front surface of the molded product and the second film was bonded to the back surface to obtain a simultaneously decorated decorative product.

[0007] While the first film and the second film having the through-hole are temporarily adhered between the A-type and the B-type having the molten resin gate, the first film is on the A-mold side. Into the mold, and positioned so that the through-hole of the second film coincides with the molten resin gate;
After adhering the film to the mold B by suction, the molten resin injected from the gate of the mold B and passing through the through hole is interposed between the first film and the second film, so that the first film and the second film are interposed in the cavity space. By peeling off the second film, the first film was bonded to the surface of the molded product, and the simultaneously decorated decorative product was obtained in which the second film was bonded to the back surface.

[0008] While the first film and the second film are temporarily adhered between the A-type and the B-type having a molten resin gate, the first film is placed in the A-type mold so that the first film is on the A-mold side. After supplying and closing the mold, and bringing the second film into close contact with the B mold, the gas is ejected from the gas ejection hole of the B mold to form a through hole in the second film, and the gas is ejected from the gas ejection hole to penetrate. The gas that has passed through the hole is cut between the first film and the second film, thereby separating the first film and the second film in the cavity space, and then injecting a molten resin from a gate to form a molded product. The first film was bonded to the front surface of the substrate and the second film was bonded to the back surface to obtain a simultaneously decorated decorative article.

While the first film and the second film are temporarily adhered between the A-type and the B-type having a molten resin gate, the first film is placed in the A-type mold so that the first film is on the A-mold side. After supplying the mold, closing the mold and bringing the second film into close contact with the mold B by suction, the molten resin is injected from the molten resin gate of the mold B to form a through hole in the second film, and the gate of the mold B is formed. Molten resin that has been injected through the through-hole from the first film and the first film and the second film in the cavity space by being cut between the first film and the second film,
The first film was bonded to the front surface of the molded product and the second film was bonded to the back surface to obtain a simultaneously decorated decorative product.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for manufacturing a simultaneously decorated decorative article will be described below with reference to the drawings. That is, first, A
While the first film and the second film are temporarily in close contact between the mold and the B mold having the molten resin gate, the first film is supplied into the mold such that the first film is on the A mold side, The first film covers at least the gate, but the second film does not cover the gate.

As a film to be used, a film in which a first film 1 and a second film 2 are temporarily adhered to each other is used. In order to facilitate the gas or molten resin 8 to be inserted between the first film 1 and the second film 2 in a later step, the first film 1 having a large area and the second film
The first film 1 having a size in which the film 2 is temporarily brought into close contact with the film 2 (see FIGS. 1 and 2) or the second film 2 having a through hole and covering the through hole 3 and the first film 1 It is good to use what made the 2 film 2 adhere temporarily temporarily (refer FIG. 3, FIG. 4). The method of temporarily adhering the first film 1 and the second film 2 is such that the two films are simply overlapped with each other so that the film can be peeled off by interruption of gas or interruption of the molten resin 8, or temporarily adhered by static electricity. And a method of temporarily contacting with an adhesive or an adhesive. In order to further increase the adhesive force between the molten resin to be interrupted and the two films and to suppress the jet pressure of the interrupted gas, a method of merely overlapping or a method of temporarily contacting by static electricity is preferable. In order to realize a state in which only the first film 1 covers the molten resin gate 4 and the second film 2 does not cover the molten resin gate 4, it is preferable to form the through-hole 3 in the second film 2. The size of the through hole 3 is equal to or larger than the opening area of the molten resin gate 4 described later. Specifically, it is preferable to form the through-hole 3 having a diameter larger by 0 to 10 mm than the diameter of the opening of the molten resin gate 4. In order to more reliably prevent the phenomenon that the molten resin 8 enters between the second film 2 and the B mold 5 (hereinafter referred to as “back-around”), the diameter of the opening of the molten resin gate 4 should be 0.5 to 0.5 mm. 1.0 mm larger through hole 3
Is preferred. As the first film 1 and / or the second film 2, for example, a so-called “post-mold substrate film release type” film in which a release layer, a picture layer, and an adhesive layer are laminated on a substrate film, or on the substrate film There is a so-called "post-molding base film non-peelable type" film in which a pattern layer and an adhesive layer are laminated. As a specific example of the first film 1, a transparent colored ink layer using a resin mixed with a yellow pattern pigment and a transparent adhesive layer using an acrylic resin are respectively formed on a 0.2 mm thick acrylic film as a base film. Some have formed. Second
Specific examples of the film 2 include a 0.05 mm thick polyethylene terephthalate film as a base film, a transparent hard coat layer made of an acrylic resin ink, a 0.1 mm thick transparent polycarbonate film, and a transparent smoke color as a picture layer. Transparent printing ink layer,
A transparent adhesive layer made of an acrylic resin is formed, and a through-hole 3 having a diameter of 11 mm (an inner diameter of an opening of a molten resin gate of 10 mm) is formed.

When the first film 1 has a larger area than the second film 2, the film is fed in the film feed direction 13, and only the first film 1 covers the molten resin gate 4 and then the second film 2 The film feed may be completed before reaching the gate 4 (see FIGS. 1 and 5). When the through-hole 3 is formed in the second film 2, the film may be fed in the film feed direction 13 and the film feed may be completed so that the through-hole 3 of the second film 2 coincides with the gate (FIG. 3).

After the film feeding is completed, the film may be clamped by the B-type 5 or A-type 6 clamp plate 12.

Next, after closing the mold, the second film 2 is
After being brought into close contact with the mold 5, the first film and the second film 2 are peeled off in the cavity space, and the first film
A film is attached, and the simultaneously decorated decorative article in which the second film 2 is attached to the back surface is obtained.

In order to adhere the second film 2 to the B mold 5 by suction, the second film 2 is preferably brought into close contact with the vacuum suction port 7 formed in the B mold 5. The reason why the second film 2 is brought into close contact with the B mold 5 is to eliminate the “back-around” of the molten resin 8.

In order to separate the first film 1 and the second film 2 from each other in the cavity space 11, a gas (see FIG. 6) jetted from the gas jet holes 10 of the B-type 5 or B
The molten resin 8 injected from the molten resin gate 4 of the mold 5 is preferably inserted between the two films (see FIG. 7). The gas or the molten resin 8 to be interrupted may pass through the through hole 3 formed in the second film 2 and be interrupted between the two films (see FIGS. 3 and 4). The gas ejection holes 10 are preferably formed near the molten resin gate 4 (see FIGS. 5, 6, and 7). By forcibly interrupting the gas, both films can be surely peeled off in the cavity space. Further, in order to make it easier for the gas or the molten resin 8 to be inserted between the two films, a wedge-shaped interrupt block having a sharp tip may be inserted from the end portions 9 of both the films (not shown). Alternatively, the through-hole 3 may be formed only in the second film 2 by the injection pressure of the gas to be interrupted or the injection pressure of the molten resin 8, and the through-hole may be passed through the through-hole 3 so as to be interposed between the two films (not shown). Zu).
In this case, a through hole is formed only in the second film 2 and the first film is formed.
In order not to form through-holes in the film 1, the first film 1 is made of a material having a low hardness to be easily broken, and the second film 2 is made relatively harder than the first film. It is good to use what is easily torn, and what adhered these temporarily. Alternatively, in order to prevent chips and the like generated when forming the through-hole in the second film 2 from adhering to and mixing with the simultaneously decorated decorative article, the narrow groove portion 14 is provided at a position adjacent to the cavity space 11.
May be formed, and the molten resin gate 4 may be formed at a position facing the narrow groove portion 14 (see FIG. 8). Further, the color of the molten resin 8 and the color of the second film 2 may be made similar to each other so that the chips and the like are not conspicuous even when adhering. When the narrow groove portion 14 is formed, there is also an effect that a gate mark of the molten resin injection gate 4 does not remain on the back surface of the molded product.

The gas to be ejected is a gas such as nitrogen gas, and the ejection pressure of the ejected gas is 300 kg /
It is good to make it eject with the ejection pressure of a square centimeter.

Examples of the molten resin 8 include ABS resin, PS resin, PP resin and alloys thereof (for example, PC and AB).
S). Examples of a method for injecting the molten resin 8 include a normal injection molding method, a stamping molding method, and an injection compression molding method. The molten resin 8 may be injected from the fixed type molten resin gate 4 of the A type 6 and the B type 5 or may be injected from the movable type molten resin gate 4. . Alternatively, the molten resin gate 4 may be formed in the gap between the A-type 6 and the B-type 5 and injected. If the degree of adhesion between the two films is 100 kg / square centimeter due to the injection of the molten resin 8, the injection may be performed at an injection pressure of 100 kg / square centimeter. Examples of the completed simultaneously decorated product include, for example, the first film 1 shown as a specific example.
And the second film 2 shown as a specific example,
Cavity space 11 where helmet shield can be molded
When A type 6 and B type 5 formed when the mold is closed are used and polycarbonate resin is used as the molten resin 8, a transparent shield (for a helmet) having a thickness of 3 mm and a thin dark blue transparent smoke color is obtained. Can be.

[0019]

The method for producing a simultaneously decorated decorative article according to the present invention has the above-described configuration. Therefore, since the first film and the second film can be handled as a single film in which the first film and the second film are temporarily adhered to each other, the first film and the second film are supplied to only one of the A mold and the B mold, and are supplied to one of the molds. It is only necessary to adjust the position, fix, and suction. Therefore, only one supply unit and supply step, one alignment unit and alignment step, one fixing unit and fixing step, and one vacuum suction step are required for the first film and the second film. Therefore, since the supply step, the positioning step, the fixing step, and the suction step are all performed in one step, the production efficiency is improved. In addition, since the first film and the second film can be supplied to the mold in the state of a single film in which the first film and the second film are temporarily brought into close contact with each other, no displacement occurs between the first film and the second film. In addition, the positioning accuracy of the front and back patterns is improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing one step of a method for manufacturing a simultaneously decorated decorative molded article according to the present invention.

FIG. 2 is a cross-sectional view showing one step of the method for manufacturing a simultaneously decorated decorative molded article according to the present invention.

FIG. 3 is a cross-sectional view showing one step of the method for manufacturing a simultaneously decorated decorative molded product according to the present invention.

FIG. 4 is a cross-sectional view showing one step of a method for manufacturing a simultaneously decorated decorative molded article according to the present invention.

FIG. 5 is a cross-sectional view showing one step of the method for manufacturing a simultaneously decorated decorative molded product according to the present invention.

FIG. 6 is a cross-sectional view showing one step of the method for manufacturing a simultaneously decorated decorative molded product according to the present invention.

FIG. 7 is a cross-sectional view showing one step of the method for manufacturing a simultaneously decorated decorative molded article according to the present invention.

FIG. 8 is a cross-sectional view showing one step of the method for manufacturing a simultaneously decorated decorative molded product according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st film 2 2nd film 3 Through-hole 4 Molten resin gate 5 B type 6 A type 7 Vacuum suction port 8 Molten resin 9 End part 10 Gas ejection hole 11 Cavity space 12 Clamp plate 13 Film feeding direction 14 Narrow groove part

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toshikazu Kobe 3, Mibuhanai-cho, Nakagyo-ku, Kyoto-shi, Kyoto Inside Nihon Photo Printing Co., Ltd. Address Nihon Photo Printing Co., Ltd. F-term (reference) 4F202 AA13 AA28 AD05 AD09 AD20 AD35 AF10 CA11 CB01 CB13 CB19 CB20 CP01 CP06 CQ01 CQ06 4F206 AA13 AA28 AD05 AD09 AD20 AD35 AF10 JA03 JA07 JB13 JB19 JB20 JF05 JFJ

Claims (6)

[Claims] 1. A mold in which a first film and a second film are temporarily adhered between a mold A and a mold B having a molten resin gate so that the first film is on the mold A side. After the first film covers the gate and the gas injection holes, the second film is positioned so as not to cover the gate and the gas injection holes, and after closing the mold, the second film is suction-adhered to the B type. After that, the first film and the second film are separated from each other in the cavity by injecting the gas injected from the B mold between the first film and the second film. A method for producing a simultaneously-decorated molded article, comprising: injecting the molded article, and bonding the first film to the front surface of the molded article, and obtaining the simultaneously-decorated molded article having the second film adhered to the back surface. 2. A mold in which the first film and the second film are temporarily adhered between the mold A and the mold B having a molten resin gate such that the first film is on the mold A side. After the first film covers the gate and the gas injection holes, the second film is positioned so as not to cover the gate and the gas injection holes, and after closing the mold, the second film is suction-adhered to the B type. After that, the first film and the second film temporarily adhered to each other.
The first film and the second film are separated from each other in the cavity space by interposing the molten resin injected from the gate between the films, and the first film is bonded to the surface of the molded product, and the second film is formed on the back surface. A method for producing a simultaneously decorated decorative molded product, characterized in that a bonded simultaneously decorated decorative product is obtained. 3. The first film is in contact with the A mold side while the first film and the second film having a through hole are temporarily adhered between the A type and the B type having a molten resin gate. After that, the through hole of the second film is positioned so that the through hole of the second film coincides with the molten resin gate and the gas ejection hole, and the mold is closed. The first film and the second film are separated from each other in the cavity space by causing the gas ejected from the gas ejection hole of the mold and passing through the through hole to be interposed between the first film and the second film. Inject molten resin from
A method for producing a simultaneously decorated decorative molded article, comprising obtaining a simultaneously decorated decorative article in which a first film is bonded to a front surface of a molded article and a second film is bonded to a back surface. 4. A method according to claim 1, wherein the first film and the second film having a through hole are temporarily adhered between the A type and the B type having a molten resin gate, and the first film is in contact with the A mold side. So that the through hole of the second film is aligned with the molten resin gate, and the mold is closed.
After adhering the film to the mold B by suction, the molten resin injected from the gate of the mold B and passing through the through hole is interposed between the first film and the second film, so that the first film and the second film are interposed in the cavity space. A method for producing a simultaneously-decorated molded article, wherein the first and second films are peeled off from each other, the first film is laminated on the surface of the molded article, and the second simultaneously-decorated article is laminated on the back surface. 5. A mold in which the first film and the second film are temporarily adhered between the mold A and the mold B having a molten resin gate so that the first film is on the mold A side. After the mold is closed and the mold is closed, the second film is brought into close contact with the mold B by suction, and then gas is ejected from the gas ejection holes of the mold B to form through holes in the second film and ejected from the gas ejection holes. The gas that has passed through the through-hole is separated between the first film and the second film in the cavity space by being interposed between the first film and the second film, and then the molten resin is injected from the gate, A method for producing a simultaneously decorated decorative molded article, comprising obtaining a simultaneously decorated decorative article in which a first film is bonded to a front surface of a molded article and a second film is bonded to a back surface. 6. A mold in which the first film and the second film are temporarily adhered to each other between the mold A and the mold B having a molten resin gate so that the first film is on the mold A side. The mold is closed, the mold is closed, and the second film is brought into close contact with the mold B by suction. Then, a molten resin is injected from a molten resin gate of the mold B to form a through-hole in the second film. The molten resin injected from the gate and passed through the through-hole, the first film and the second film are separated in the cavity space by being interrupted between the first film and the second film,
A method for producing a simultaneously decorated decorative molded article, comprising obtaining a simultaneously decorated decorative article in which a first film is bonded to a front surface of a molded article and a second film is bonded to a back surface.