JPS6230029A - Method for forming pattern of synthetic resin molding - Google Patents

Abstract

PURPOSE:To form a three dimensional and complicated pattern on a surface of the synthetic resin molding, by printing a pattern and making a adhesive layer on a surface of a sheet, by making a masking layer forming a pattern on another surface, by making a vapor deposition layer on the masking layer side and by removing the masking layer with the vapor deposition layer. CONSTITUTION:A pattern 4 is printed and an adhesive layer is coated on a surface of a synthetic resin sheet 3. A masking layer 7 forming a pattern is prepared on another surface of the sheet 3. The sheet 3 is molded by vacuum molding to a surface shape of a molding 1. A molten resin 13 is poured on the inner surface side, i.e. the adhesive layer side, of the sheet 3 in a cavity 9 of a mold 8. An opaque vapor deposition layer 5 formed by vapor-depositing aluminum, copper and others is prepared on the outer surface side of the molding 1, i.e. the masking layer side 7 of the sheet 3. The masking layer 7 and the vapor deposition layer 5 on it are removed by washing out with alcohol and others. The vapor deposition layer 5 only remains thereby on the non- masking part to form a pattern.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for forming a pattern on the surface of a synthetic resin molded product.

(Prior Art) As a method for forming an arbitrary pattern on the surface of a synthetic resin molded product, for example, Japanese Patent Publication No. 33456/1983 discloses a method for painting a synthetic resin molded product. This involves heat-forming a transfer sheet with an arbitrary pattern formed on a base sheet that can be thermoformed, forming a molded product with a pattern that matches the inner surface of the mold, and then applying the patterned molding to the molded product. The molding receiver is attached to the inner surface of the mold, and then molding resin is supplied to the inner surface of the decorated molded product and molding is performed, and then the mold is removed from the molding receiver, and the basic sheet of the transfer sheet is peeled off. This is a method of removing it.

(Problem to be solved by the invention) Therefore, according to the conventional method, the pattern on the transfer sheet is simply transferred to the surface of the synthetic resin molded product, and the pattern on the surface of the synthetic resin molded product is flat and compared to It was monotonous and lacked beauty or interest.

In view of the above-mentioned problems, the present invention is designed to form a complex, beautiful, and interesting pattern on the surface of a synthetic resin molded product.

(Means for Solving the Problem) The technical means of the present invention for solving this technical problem is to print a pattern 4 on one surface of the sheet 3 and provide an adhesive layer 2, and to print a pattern 4 on the other surface. Masking layer 7 forming
Thereafter, the sheet 3 is formed into the surface shape of the synthetic resin molded product 1 by vacuum forming, and is installed in the cavity 9 of the molding die 8, and then the molten resin 13 is placed in the cavity 9.
is supplied to the adhesive layer 2 side of the sheet 3 to form the synthetic resin molded product 1.
is formed so that a sheet 3 is polymerized on its surface with an adhesive layer 2 interposed therebetween, and then a vapor deposition layer 5 is provided on the masking layer 7 side of the sheet 3. It is at the point where it was removed along with 5.

(Function) A pattern 4 is formed on the inner surface of the sheet 3 polymerized on the surface of the synthetic resin molded product 1, and the pattern 4 is formed on the vapor deposition layer 5 on the outer surface.
can be partially hidden, and a three-dimensional and complex pattern can be formed on the surface of the synthetic resin molded product 1 by the pattern of the vapor deposited layer 5 and the printed pattern 4.

(Example) Hereinafter, the present invention will be explained according to the illustrated example.
The figure shows a bottomed cylindrical synthetic resin molded article 1 with a pattern formed on its surface by the method of the present invention.

This molded product 1 is used, for example, as a cap for a cosmetic container, a bowl-shaped container, or the like, and a synthetic resin sheet 3 is polymerized on the outer surface of the molded product 1 with an adhesive layer 2 interposed therebetween.

A pattern 4 is printed on the inner surface of the sheet 3, and a vapor deposition layer 5 is provided on the outer surface to form another pattern. A transparent coating layer 6 is provided on the outer surface side of the vapor deposited layer 5. The outer surface of the synthetic resin molded product 1 has a printed pattern 4.
A three-dimensional and complex pattern is formed on the outer surface of the molded product 1 by overlapping the pattern formed by the opaque vapor deposition layer 5 deposited thereon.

Next, a case in which a pattern is formed on the surface of the molded product 1 by the method of the present invention will be described in detail.

First, as shown in FIG. 1, a pattern 4 is printed on one surface of a synthetic resin sheet 3, and an adhesive layer 2 is applied.

Further, a masking layer 7 for forming a pattern is provided on the other surface of the sheet 3. The sheet 3 is made of vinyl chloride, polyethylene terephthalate, polypropylene, polyethylene, nylon, etc., and is vacuum-formable and transparent.

The masking layer 7 is made of acrylic resin or the like, and can be washed off with alcohol. Examples of the material for the adhesive layer 2 include acrylic resins, vinyl resins, polyamide resins, and phenol resins, and are determined in consideration of weldability with the resin forming the molded product 1.

Thereafter, as shown in FIG. 2, the sheet 3 is formed into the surface shape of the molded product 1 by vacuum forming. In this case, the sheet 3 has a bottomed cylindrical sheet main body 3a that fits the outer surface of the molded product 1 and a flange portion 3b on the outer periphery, and an adhesive layer 2 on the inner surface thereof.
is formed so that it is located.

Next, the vacuum-formed sheet 3 is formed into a molded product 1 as shown in FIG.
It is mounted in a cavity 9 of a resin molding die 8 for molding. At this time, the flange portion 3b of the sheet 3 is pressed between the upper mold 10 and the lower mold 11 of the mold 8, and the sheet main body 3a is arranged in the cavity 9 so as to follow the inner surface of the lower mold 11.

Then, as shown in FIG. 4, a molten resin 1
Inject 3. The molten resin 13 is appropriately selected from synthetic resins such as vinyl resin, polyethylene, polypropylene, styrene resin, polyamide, and phenol resin, depending on the required characteristics of the molded product 1. sheet 3
As the molten resin 13 is injected into the inner surface of the mold, the pressure of the molten resin 13 presses the sheet 3 into contact with the inner surface of the lower mold 11, and the molded product 1 is formed so that the sheet 3 is polymerized on the outer surface of the mold. is formed into.

Thereafter, as shown in FIG. 5 (take out the molded product 1 from the mold 8,
As shown in FIG. 6, an opaque vapor deposition layer 5 made of aluminum, copper, or the like is provided on the outer surface of the molded product 1, that is, on the masking layer 7 side of the sheet 3.

Then, the masking layer 7 is washed off and removed together with the vapor deposited layer 5 on the masking layer 7 using alcohol or the like.

As a result, the vapor deposited layer 5 remains only in the non-masked areas, forming a pattern, as shown in FIG.

Finally, after cutting the flange portion 3b of the sheet 3 as shown in FIG. 7, a transparent coating layer 6 is applied to the outer surface of the molded product 1 as shown in FIG.

In the above embodiment, the pattern is formed on the outer surface of the synthetic resin molded product 1, but instead, the pattern may be formed on the inner surface of the molded product 1. Further, the shape of the molded product 1 is not limited to a cylindrical shape with a bottom, but may be a bowl shape, a spherical shape, or other shapes.

(Effects of the Invention) According to the present invention, the pattern 4 is formed on the inner surface of the sheet 3 polymerized on the surface of the synthetic resin molded product 1, and the pattern 4 is partially hidden by the vapor deposition layer 5 on the outer surface. is completed, vapor deposited layer 5
A three-dimensional and complicated pattern can be formed on the surface of the synthetic resin molded product 1 by the pattern 4 and the printed pattern 4, and the surface of the molded product 1 can be made beautiful and interesting. Moreover, the pattern formed by the vapor deposited layer 5 that hides the pattern 4 can be easily formed by using the masking layer 7, and the effect is remarkable.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a side sectional view of the sheet, FIG. 2 is a side sectional view of the sheet after vacuum forming,
Figure 3 is a side sectional view of the sheet attached to the molding die, Figure 4 is a side sectional view of the resin molding die when the injection of molten resin is completed, and Figure 5 is a side sectional view of the molded synthetic resin molded product. 6 is a side sectional view of the synthetic resin molded product with the vapor deposited layer provided; FIG. 7 is a side sectional view of the synthetic resin molded product with the masking layer removed. FIG. 8 is a side sectional view of a synthetic resin molded article provided with a transparent coating layer. 1-Synthetic resin molded product, 2-adhesive layer, 3-synthetic resin sheet, 4-pattern, 5-vapor deposition layer, 7-masking layer, 8-resin molding mold, 9--cavity, 13° - Molten resin.

Claims (1)

[Claims] 1. Print a pattern 4 on one surface of the sheet 3 and provide an adhesive layer 2, and provide a masking layer 7 for forming a pattern on the other surface, and then vacuum form the sheet 3 into a synthetic resin molded product 1. After forming the surface shape, molding die 8
Next, molten resin 13 is supplied into the cavity 9 to the adhesive layer 2 side of the sheet 3, and the synthetic resin molded product 1 is placed on the surface of the sheet 3 through the adhesive layer 2, so that the sheet 3 is polymerized. After that, the masking layer 7 of the sheet 3 is formed.
A method for forming a pattern on a synthetic resin molded product, characterized in that after providing a vapor deposited layer 5 on the side, a masking layer 7 is removed together with the vapor deposited layer 5 on the masking layer 7.