JPS58209637A - Molded accessary and its manufacturing method - Google Patents

Abstract

PURPOSE:To prevent the outward deterioration of a base coat layer that colors the entire surface of a body of a molded accessary when it is released by providing the base coat layer and a metallic thin film layer at the specified location on the surface of this base coat layer and covering both these layers with a transparent top coat layer. CONSTITUTION:In order to manufacture a molded, accessary for example a molding attached inside or outside of a car, a base coat layer 11 that colors the entire surface of a body of a molded 10 is provided and a metallic thin film layer 12 is applied only to the sheen part A on the surface of this layer 11 and then a transparent top coat layer 13 is provided on the entire surface. As a result, a metallic sheen is obtained by revealing the color tone of the base coat layer 11 at a non-sheen part B through the transparent top coat 13 and the metallic thin film layer 12 at the sheen part A through said layer 13. Thus even if the base coat layer 11 is stripped, the surface of the body 10 appears, but the metallic sheen does not appear. Therefore, the stripped part does not form a striking contrast.

Description

[Detailed description of the invention] This relates to the surface structure of decorative molded products.

In general, moldings installed on the inside and outside of automobiles are
As shown in FIGS. 1, 2(a) and 2(b), a metallic bright part A and a non-bright part of a predetermined color are formed on the surface side of a main body 1 made of synthetic resin by injection molding or extrusion molding. B
has been proposed.

Conventionally, a decorative molded product having the above-mentioned metallic bright portion A and non-bright portion B is subjected to surface treatment in the following manner. That is, first, a pace coat layer 2 is provided on the entire surface of the main body 1, then a metal thin film layer 3 is provided on the entire surface by plating or the like, and then a transparent top coat layer 4 is provided on the entire surface of this metal thin film layer 3. will be established. Next, metallic bright part A
A mask with a predetermined pattern is applied to the area to be provided with color, and in this state, a colored coating layer 5 is provided by spraying or applying a paint of a predetermined tone to the non-bright area B.

With this method, the metal thin film layer 3 is exposed on the metallic shiny part A through the transparent top coat layer 4, and the non-shiny part B is exposed.
The colored coat layer 5 is exposed.

However, in this way! According to the manufactured molding, if the colored coating layer 5 is partially peeled off due to long-term use or abrasion by a brush of a car wash, etc., the metal thin film layer 3 will appear from this peeled off part. This is because the peeled portion becomes brightly colored, making it extremely noticeable and resulting in an extremely poor appearance.

Furthermore, when manufacturing a molding having such a configuration, there are the following drawbacks. In other words, when forming the colored coat layer 5, a paint with a thickness of about 10 to 20 microns is deposited on the mask placed on the bright part A, and this paint is gradually deposited each time the colored coat layer 5 is formed. It ends up. Therefore, the bright part A
The shape of the side edge of the mask corresponding to the boundary C side between and the non-bright portion B is uneven, and therefore, when the colored coating layer 5 is applied using this mask, the boundary C becomes blurred and there is no clear boundary. can't get it. If you use paint thinner etc. to remove the paint that has adhered to the mask, it will stick firmly and
It is not easy to remove dried paint, which causes poor workability, and the use of thinner is undesirable from a sanitary standpoint. In addition, the mask must be replaced with a new one after only a few uses, resulting in extremely poor workability.

[-Therefore, the purpose of the present invention is to provide a colored base coat layer, expose this base coat layer to the surface side to form a non-glossy area, place a mask on this non-glossy area, and then
The above-mentioned drawbacks are eliminated by providing a metal thin film layer in the portion corresponding to the bright portion, and will be explained in detail below using Examples.

FIGS. 3(a) and 3(b) are cross-sectional views showing one embodiment of the decorative molded product according to the present invention, in which the molded product main body 1
A colored base coat layer 11 is provided on the entire surface of the base coat layer 11, and a metal thin film layer 12 is applied only to the areas where the bright areas A are to be provided, and a transparent layer 12 is applied to the entire surface of the base coat layer 11. A top coat layer 13 is provided.

According to the above configuration, the color tone of the base coat layer 11 is exposed to the non-bright portion B through the transparent top coat layer 13, and the color tone of the base coat layer 11 is exposed to the bright portion A through the transparent top coat layer 13.
The metal thin film layer 12 is exposed and a metallic luster is obtained. In this case, even if the base coat layer 11 on the non-bright portion B side peels off due to long-term use or wear of a car wash brush, etc., the main body 10
The peeled area is not noticeable and there is no risk of significantly impairing the beauty. Furthermore, since the base coat layer 11 is covered with the top coat layer 13, damage to the base coat layer 11 can be suppressed.

To manufacture a molding with this configuration, the fourth
As shown in the figure, after applying a base coat layer 11 colored with pigments, dyes, etc. to the main body 10, a mask M having a predetermined pattern corresponding to the non-bright portion B is placed so as to cover the non-bright portion B side, In this state, the main body 10 is subjected to a sputtering device or a vacuum evaporation device to perform sputtering and vacuum evaporation.

When the mask M is removed, the metal thin film layer 1 is formed only on the bright part A.
2 is formed. Then, by covering the entire surface with a transparent top coat layer 13, a bright portion A and a non-bright portion B can be obtained.

According to the method of manufacturing a molding according to the present invention, even if a metal film is deposited on the mask M, the thickness of one layer is extremely thin, about 300 to 500 Å, by sputtering or vacuum evaporation. Therefore, even if this mask is used for a long period of time, the outer shape of the mask on the boundary C side is unlikely to become uneven, and the pattern of the boundary C can be clearly defined.The mask can also be used many times in succession, improving workability and improving workability. It is advantageous in terms of cost. In addition, the metal coating attached to the mask M is
Since it can be removed by applying slight vibration or impact to the mask M, or by lightly rubbing it with a cloth, etc., the workability is good, and there is no need to use thinner or the like to remove it, which is preferable in terms of work hygiene. Furthermore, since the conventional colored coating layer is not provided in this embodiment, the number of work steps can be reduced and mass production can be achieved.

As explained above, according to the decorative molded product according to the present invention,
Since there is no metal thin film layer under the colored base coat layer, even if this base coat layer partially peels off,
Shine does not appear from the peeled part, and deterioration in appearance can be prevented.

Further, according to the method for manufacturing a decorative molded product according to the present invention, a mask is used when rubbing the metal thin film layer t/A for forming the bright part, so that unevenness in the shape of the mask is less likely to occur. , a clear decorative pattern can be obtained, the mask can be used continuously, and workability is improved.

[Brief explanation of the drawing]

Figures 1, 2 (a) and 2 (b) are a front view and a sectional view showing an example of a conventional decorative molded product and its manufacturing method, and Figure 3 (
FIGS. 4A, 4B, and 4 are cross-sectional views showing an embodiment of the decorative molded product and the method for manufacturing the same according to the present invention. 10... Decorative molded product body, 11... Base coat layer,
12...Metal thin film layer. Patent applicant: Hashimoto Forming Industry Co., Ltd. Agent Patent attorney: Jun Miyazono − ((,U° V°″′
4□ 5716 Oh, ;. Commissioner of the Japan Patent Office Haruki Shimada 3 Relationship with the case of the person making the amendment Patent applicant 4, agent 〒102 5 Date of amendment order JP 58-209637 (4)

Claims (3)

[Claims] (1) A decorative molded product main body, a pacecoat layer provided on the entire surface of the main body and having a predetermined color tone, a metal thin film layer applied to a predetermined portion of the surface of this pacecoat layer, and this metal thin film layer and a transparent top coat layer covering the base coat layer. (2) Molding the main body of the decorative molded product, forming a base coat layer mixed to a predetermined color tone over the entire surface of the main body, then masking a predetermined portion of the base coat layer, and covering the exposed portions with the mask. 1. A method for producing a decorative molded article, comprising depositing a metal thin film layer and then providing a top coat layer on at least a portion including the surface of the metal thin film layer. (3) The method for producing a decorative molded article according to claim 1, wherein the metal thin film layer is formed by sputtering or vacuum deposition.