JPS6147710B2 - - Google Patents

Description

Detailed Description of the Invention The present invention relates to a synthetic resin product with metallic decoration and a method for molding the same. More specifically, the present invention relates to a synthetic resin product with metallic decoration and a method for molding the same. The purpose is to obtain a product with an integrally molded stamp and to mold this product well.

Means for decorating the surface of synthetic resin products with gold or silver metallic include means of fixing decorative pieces made of thin metal plates to the surface of synthetic resin products, means of applying metal plating, and means of applying hot stamping or transfer. There is.

Of these methods, the only ones that do not cause any problem even if the decorative surface is uneven are those that adhere decorative pieces made of thin metal sheets and those that apply metal plating; In some cases, the surface of a synthetic resin product must be relatively flat, and this flat surface shape is left unchanged.

When using a decorative piece made of a thin metal plate, it is possible to form an uneven pattern on the surface of the decorative piece itself, so that the uneven pattern on the surface of the decorative piece can be directly applied to the uneven surface of the product. It can be a pattern, or in the case of metal plating,
If an uneven pattern is formed on the surface of a synthetic resin product itself, and metal plating is applied to the surface with this uneven pattern, the uneven pattern on the surface of the synthetic resin product will remain as the uneven pattern on the metallic decorated surface. It can be made to appear as a pattern.

On the other hand, when metallic decoration is applied by hot stamping or transfer, the surface of the synthetic resin product to which the metallic decorative layer is adhered by hot stamping or transfer must be relatively flat; It cannot be applied at all.

For this reason, metallic decorations applied by hot stamping or transfer are limited to flat surfaces, and compared to using decorative pieces made of thin metal sheets or metal plating,
It is inevitable that the decorative surface will not change much, and metallic decoration by hot stamping or transfer has a lower decorative effect than when using decorative pieces made of thin metal sheets or when using metal plating. It had been.

On the other hand, it is much cheaper to apply metallic decorations to the surface of synthetic resin products by hot stamping or transfer than by using decorative pieces made of thin metal sheets or by applying metal plating. It has the advantage that it is easy to carry out, and that the resulting metallic hue can be varied.

The present invention has been devised to eliminate the above-described disadvantages of hot stamping or transfer, and to maximize the advantages thereof.One embodiment of the present invention will be described below with reference to the drawings.

The product S according to the present invention has a metallic decorative layer 4 formed by hot stamping or transfer on the relatively flat surface of a main body 1 molded from thermoplastic synthetic resin.
The decorative layer 4 is adhered to the surface of the decorative layer 4, and an inscription 9 having a concavo-convex pattern is formed integrally with the decorative layer 4.

That is, the decorative layer 4 adhered to the surface of the main body 1 by hot stamping or transfer is bent and deformed along the unevenness of the stamp 9 while maintaining a substantially uniform layer thickness, and adheres to the surface of the main body 1 to form the product S. It is being completed.

The product S according to the present invention has the above-mentioned structure, but as is well known, the decorative layer 4 adhesively molded by hot stamping or transfer is
Since good adhesive molding cannot be achieved unless the surface of the main body 1 is relatively flat, in order to mold this product S, a decorative layer is applied to the relatively flat surface of the main body 1 by hot stamping or transfer. After laminating and molding the decorative layer 4 with adhesive, it is necessary to mold the stamp 9 integrally with the decorative layer 4 by an appropriate method.

Various methods can be used to form the markings 9, but the method does not deteriorate the metallic decoration effect of the decorative layer 4, does not damage the decorative layer 4, and can also be formed between the surface portion of the main body 1 and the decorative layer 4. There is a restriction that it must be integrally molded.

A method for molding a product S according to the present invention that satisfies all of the above conditions and is simple and reliable will be described below.

First, as shown in FIG. 1, a metallic decorative layer 4 is placed on the lower surface of a base sheet 5 via a release layer on a desired relatively flat surface of a main body 1 made of thermoplastic synthetic resin. film 3
are placed facing each other, and this decorative film 3 is firmly pressed onto the surface of the main body 1 using, for example, heated silicone paraffin 6, the decorative layer 4 is adhesively fixed to the surface of the main body 1, and the primary molded product 2 (second molded product) is formed. (See Figure 2).

In this molded primary molded product 2, the main body 1
Since the decorative layer 4 adhesively fixed to the main body 1 is flat according to the flat surface of the main body 1, the decorative surface of the primary molded product 2 formed by this decorative layer 4 is a flat surface without unevenness. .

On the surface of the decorative layer 4 of this primary molded product 2, a film 8 which is heat resistant, has high thermal conductivity, does not stick to the decorative layer 4, and is extremely easily deformed is placed. The stamping body 7 is placed opposite the surface of the decorative layer 4 of the primary molded product 2 with the stamped body 7 in between (see FIG. 3).

The decorative layer 4 of the primary molded product 2 is heated to a temperature that allows the stamping body 7 to be stamped onto the main body 1.
The product S is formed by pressing the film 8 while sandwiching it on the surface formed by (see Fig. 4), and forming a stamp 9 having an uneven pattern on the surface formed by the decorative layer 4 of the primary molded product 1. achieved.

When forming the stamp 9, the stamp 7 is pressed onto the decorative layer 4 through the film 8, so there is no risk of the decorative layer 4 being damaged by the extremely hard stamp 7, and the stamp 9 is formed by heat processing. Therefore, the pressing force of the stamped body 7 is not very strong, and there is no risk of damaging the decorative layer 4 as well.

Further, since the heat treatment by the stamping body 7 is performed only on a very limited area of the surface portion of the main body 1, that is, only the surface portion facing the stamping body 7, the entire body 1 and the entire decorative layer 4 are applied to the stamping body 7. There is no deformation or adhesive deterioration due to heat.

Further, the heating temperature of the stamped body 7 may be approximately equal to or slightly higher than the temperature at which the decoration layer 4 is hot-stamped or transferred onto the main body 1, so that the decoration layer 4 itself can be heated to the stamped body 1. There is no disadvantage in that the metallic decoration effect is deteriorated by the temperature of 7.

As is clear from the above description, the present invention enables metallic decoration to be applied by hot stamping or transfer, and a desired uneven pattern to be formed on the metallic-decorated surface. can be easily molded,
As a result, the decorative effect by hot stamping or transfer can be further enhanced, and it has many excellent effects such as being easy to implement.

[Brief explanation of the drawing]

FIG. 1 is a layout diagram showing a hot stamping process for adhesively fixing a metallic decorative layer to the surface of a synthetic resin main body. FIG. 2 is a longitudinal cross-sectional view of a main part of a primary molded product formed by adhesively fixing a metallic decorative layer to the surface of the main body. FIG. 3 is a layout diagram showing the step of forming a stamp on the surface of the primary molded product, and FIG. 4 is a longitudinal sectional view of the main part during stamp forming. FIG. 5 is a longitudinal sectional view of the main part of the product according to the present invention. Explanation of symbols, S...Product, 1...Main body, 2...
Primary molded product, 3... Decorative film, 4... Decorative layer, 5... Base sheet, 6... Silicone rubber, 7... Engraved body, 8... Film.

Claims (1)

[Claims] 1. A metallic decorative layer 4 is adhesively positioned on the relatively flat surface of the main body 1 made of synthetic resin by hot stamping or transfer, and the decorative layer 4 is placed on the surface of the main body 1 where the decorative layer 4 is located. Synthetic resin product with metallic decoration made by molding the stamp 9 integrally with. 2. A metallic decorative layer 4 is adhesively positioned on the relatively flat surface of the main body 1 made of synthetic resin by hot stamping or transfer to form a primary molded product 2, and the decorative layer 4 of the primary molded product 2 is The stamped body 7 is heated on the applied surface through a film 8 formed of a material that is heat resistant and has high thermal conductivity, does not stick to the decorative layer 4, and is easily deformed.
A method for molding a synthetic resin product with metallic decoration, in which a stamp 9 is formed integrally with the decorative layer 4 on the surface of the main body 1 on which the decorative layer 4 has been applied by pressing.