JPS631482A - Coloration of resin molded article - Google Patents

Abstract

PURPOSE:To make the boundary with a painted part sharp and to facilitate color matching, by forming a color transfer film to the surface of a resin molded article by an insert technique. CONSTITUTION:A sheet material 2' colored black is applied between molds 3, 4 and, subsequently, the molds 3, 4 are matched to inject a urethane resin raw material containing, for example, black pigment to perform molding. By this method, the black color part applied to the colored sheet material 2' is transferred to the surface of a molded article 1 such as a resin bumper and a black transfer film 2 is formed in a closely contacted state. Next, a masking material 5 is applied to a part of the transfer film 2 of the molded article 1 and spray painting is applied to the other part to color the molded article 1 by the same color as the body color of an automobile to finish the same.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for coloring a resin molded product such as a resin pump for an automobile.

[Jubei technology]

In modern times, automobiles are often equipped with oil pumps. Here, such a resin pamper is I) molded by injecting a urethane resin raw material containing a black pigment into a required mold. That is, the pamba molded in this manner is colored black at the time of molding. The area that is colored black at the time of molding is called the dyed area. In addition, in recent years, it is common to leave part of the original dyed part and color the other parts of the pamba in the same color as the body color. [Problems to be Solved by the Invention] However, in such conventional bumpers, the original fi part is not coated at all, so this Iy. Irradiation of the deposited part with sunlight for a long period of time causes the so-called whitening phenomenon in which the surface of the deposited part becomes white.

Therefore, it may be possible to paint the interior with a similar color (black) to the original dyed parts, but this method would blur the boundaries between the painted parts and make it difficult to match the color with the body color. There is a part-time job.

Such problems occur in the same way when coloring resin molded products other than fat pamba. The present invention aims to solve these problems, and by skillfully utilizing the insert method, it is possible to color resin molded products with sharp boundaries between painted parts and easy color matching. The purpose is to provide a method.

[Means for solving problems]

Therefore, the method for coloring resin molded products of the present invention is characterized by the following steps. (1) Using the insert method to form a colored transfer film from a colored sheet material in close contact with the surface of the resin molded product. (2) Masking the above coating film and applying other coatings to the surface of the resin molded product. Painting process [effect] In the above-described method for coloring a resin molded product of the present invention, a colored transfer pattern from a colored sheet material is first formed in close contact with the surface of the resin molded product using the insert method, and then the above-mentioned method is applied. The colored transfer film is masked and another coating is applied to the surface of the resin molded product. [Example] Hereinafter, a method for coloring a resin molded product as an example of the present invention will be explained with reference to the drawings. Fig. 1(a) is a schematic diagram showing how a colored sheet material is applied between the molds. , f
jS1 (b) is a schematic diagram showing how a colored transfer film is formed from a colored sheet material by injecting resin between the molds, and Fig. 1 (c) is a schematic diagram showing how the painted film is masked and used for other purposes. This is a schematic diagram showing how the paint is being applied. Now, the case of coloring If fat pamba as a fffJfff molded product using this method will be explained. First, the process according to this method is roughly divided into two processes: (1) ffil process El (see diagrams (a)-(b))]
In the tS1 process, the colored sheet material 2 is manufactured using the insert method.
The colored transfer film 2 from
This is the process of forming the That is, in this process,
First, as shown in Fig. 1 (.), a sheet material 2' colored black is applied between the molds 3 and 4, and then, as shown in Fig. IjS1 (b), both molds 3 and 4 are brought together. Then, for example, urethane resin material (which contains black pigment) is injected and molded. As a result, the black painted portion applied to the colored sheet material 2' is transferred to the surface of the resin bumper 1, and a black transfer 12 is formed in close contact. The method of forming the black transfer film 2 from the colored sheet material 2' on the surface of the resin breadboard 1 in this manner is called the insert method. (2) Second step [see Figure 1(c) 1] This second step is the first step, where a black transfer film is applied to the required portions.
After the bumper 1 is formed in close contact with the bumper 1, a part of the transfer film 2 is masked (in this case, the masking member 5 is used), and the other bumper surface parts are painted by spray painting or the like. This is the process of painting the car the same color as the body color of the LJ car.

Note that the reference numeral 6 in FIG. 1(e) indicates a coating film of the same color as the body color.

In this way, the coloring of the resin pamper 1 is completed, but according to this coloring method, the transfer F! is the same color (black) as the dyed part! 2 is formed on the surface of the bumper 1 by the insert method, and then this transfer film 2 is masked and other coatings are applied to other bumper surface areas, so that the bumper colored areas may become white. Moreover, the boundaries between painted parts can be made sharper, and it is also easier to match the color with the body color. Moreover, the cost required for coloring does not increase.

Please note that this method applies to products other than resin pampas! It goes without saying that the same method can be applied to the coloring method of resin molded products. [Effects of the Invention] As detailed above, according to the method for coloring a resin molded product of the present invention, first, a colored coating film from a colored sheet material is brought into close contact with the surface of the resin molded product using the insert method. form,
The colored transfer film is then masked and another coating is applied to the surface of the resin molded product, making it possible to create a sharp border between the painted areas and making it easy to match the color with the body color, for example. You can get the effect.

[Brief explanation of the drawing]

The figure shows the method for coloring resin molded products of the present invention.
Figure (a) is a schematic diagram showing how a colored sheet material is applied between the molds, and Figure 1 (b) is a diagram showing how resin is injected between the molds to form a colored transfer film from the colored sheet material. FIG. 1(c) is a schematic diagram showing how the paint film is masked and a pond is painted.

Claims (1)

[Claims] First, a colored transfer film from a colored sheet material is closely attached to the surface of the resin molded product using the insert method, and then the colored transfer film is masked and another coating is applied to the surface of the resin molded product. A distinctive method of coloring resin molded products.