JP2003245938A - Resin molded article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin molded article having a resin film stucked thereon by in-mold processing by employing injection molding capable of producing an attractive appearance inexpensively. <P>SOLUTION: A two-layer structured resin film 2 of laminating a transparent acrylic resin layer on a printing layer is positioned in front of a molding surface of a stationary mold 31. After softening the film 2 by heating, the film 2 is sucked to the molding surface of the stationary mold 31. Then, a movable mold 32 and the stationary mold 31 are put together. A resin is injected into a cavity for molding. Then, the resin film 2 is stuck to the resin molded body by heat and pressure in molding. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin molded product having a resin film integrally adhered to the surface thereof.

[Prior art]

In order to prevent the surface of a resin molded product from being scratched and to enhance the design of the surface, a technique of integrally molding a resin film on the surface of a foamed resin cushioning body and applying a paint to the surface of the resin film is special. It is disclosed in Kaihei 10-67057. Further, in Japanese Patent Laid-Open No. 62-162537, a veneer in which natural wood is thinly sliced on the surface of a bed,
Further, a technique of stacking a film on it and press-molding it between upper and lower molds is disclosed, and Japanese Patent Laid-Open No. 63-239050 provides a base layer made of resin with a decorative layer containing metal strips. An artificial marble having a transparent clear layer formed thereon is disclosed.

On the other hand, when molding a resin product by injection molding, a resin film having a printing layer (coloring layer) formed in advance is set in the cavity during injection molding.
It is possible to make a resin film integrally adhere to the surface of a molded product by the pressure and heat of the injection resin.
19, JP-A-8-267688, JP-A-1
No. 0-278067 and Japanese Patent Laid-Open No. 11-34248 are disclosed.

[0004]

When a resin product is molded by the above-mentioned injection molding, the resin film having the printing layer is softened by heating and then stretched by vacuuming to be closely attached to the inner surface of the cavity of the molding die. Be punished. Then, in automobile parts and the like, there is a portion that is stretched by 600%. When the resin film is greatly stretched in this way, the printing layer is also stretched at the same time and becomes thin so that the base (the surface of the resin product) can be seen through and the commercial value is reduced.

Therefore, in the conventional case, the AB
Although the S resin layer is provided to prevent the underlying layer from being seen through, the three-layer structure (transparent acrylic layer / printing layer / ABS resin layer) provides a heat amount for softening the resin film by heating. There is a cost disadvantage, such as the need for more.

[0006]

In order to solve the above problems, a resin molded product obtained by injection molding according to the present invention is
A resin film is integrally adhered to the surface during injection molding, and this resin film has a two-layer structure in which the surface side is a transparent resin layer and the resin molded product side is a printed layer, and the color of the resin molded product is The resin layer has the same color as the printed layer of the resin film. In this way, by making the color of the resin molded product and the printing layer of the resin film the same color (similar color), even if the printing layer becomes thin and the underlying color can be seen through, it can be recognized. Instead, it will add depth to the color.

It is conceivable that the transparent resin layer is made of, for example, an acrylic resin, and the printing layer is a mixture of ink and aluminum strips. In this case, the color of the resin molded product is preferably grayish.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view of a scooter headlight case as a resin molded product according to the present invention, and FIG. 2 is an enlarged cross-sectional view of a main part of the resin molded product. The headlight case 1 is injection molded from a material such as polycarbonate resin. The resin film 2 is integrally adhered to the surface thereof.

The resin film 2 is a transparent acrylic resin layer 21.
The aluminum strip 23 is mixed in the print layer 22. The printed layer 22 may be a colored layer containing no aluminum strip 23.

To obtain the above headlight case 1,
As shown in FIG. 3A, the resin film 2 is lowered in front of the molding surface of the fixed die 31, and the resin film 2 is pressed against the peripheral edge of the fixed die 31 by the clamp member 3, and the heater 4 is pressed.
Heat to soften.

Next, as shown in (b), the softened resin film 2 is evacuated and sucked onto the molding surface of the fixed die 31. At this time, the resin film 2 is stretched to about 600% near the rear end of the headlight case 1.

After that, as shown in (c), the movable mold 32 is fitted to the fixed mold 31, resin is injected into the cavity for molding, and the mold is released, so that the resin film 2 is integrated with the surface of the molded product. The headlight case 1 attached to is obtained.

[0013]

As described above, according to the resin molded product of the present invention, the resin film which is integrally adhered to the surface during the injection molding is stretched and thinned,
Even if the base can be seen through, the color of the base and the color of the printed layer of the resin film are the same, so the commercial value does not decrease.

[Brief description of drawings]

FIG. 1 is a perspective view of a resin molded product (a scooter headlight case) according to the present invention.

FIG. 2 is an enlarged cross-sectional view of a main part of the resin molded product.

3 (a) to 3 (c) are views for explaining an injection molding process of the resin molded product.

[Explanation of symbols] 1 ... Resin molded product (headlight case for scooter), 2
Resin film, 21 ... Acrylic resin layer, 22 ... Printing layer, 23 ... Aluminum strip, 3 ... Clamping member, 4 ... Heater, 31 ... Fixed type, 32 ... Movable type.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hiroyuki Furusawa             1500 Hirakawa, Otsu-cho, Kikuchi-gun, Kumamoto             Inside the Kumamoto Factory of TAGIKEN Co., Ltd. (72) Inventor Kazuyuki Suginaga             1500 Hirakawa, Otsu-cho, Kikuchi-gun, Kumamoto             Inside the Kumamoto Factory of TAGIKEN Co., Ltd. (72) Inventor Bunaki Urazu             1500 Hirakawa, Otsu-cho, Kikuchi-gun, Kumamoto             Inside the Kumamoto Factory of TAGIKEN Co., Ltd. F-term (reference) 4F206 AD05 AD09 AD20 AG03 JA07                       JB13 JB19 JF05 JL02 JN11

Claims (2)

[Claims] 1. A resin molded product obtained by injection molding, wherein a resin film is integrally adhered to the surface of the resin molded product during injection molding, and the resin film has a transparent resin layer on the surface side. A resin molded product, which has a two-layer structure in which the resin molded product side has a printing layer, and the color of the resin molded product is the same as that of the printed layer of the resin film. 2. The resin molded product according to claim 1, wherein
The resin molded article, wherein the transparent resin layer is made of acrylic resin, and the printed layer is made by mixing ink with aluminum strips.