JPS63178875A - Production of extrusion-molded product having embossed pattern - Google Patents

Abstract

PURPOSE:To clarify the wooden-grain pattern of the product and to significantly enhance its wooden feeling by embossing a wooden-grain pattern on the surface of a synthetic resin extrusion-molded product, and infiltrating paint into the embossed pattern to deepen the color tone on the coated part. CONSTITUTION:A molded product A having a specified cross section is obtained by an extruder 1 from a synthetic resin molding material mixed with wood flour and others. A wooden-grain pattern is then embossed on the surface of the product A by an embossing machine 6, and a specified amt. of paint is spray-coated on the surface of the product A by a spray-coating machine 7. The coated surface is rubbed with a block 8 having appropriate elasticity to infiltrate paint into the striations caused by embossing. The coated surface is brushed by a brush 9 to uniformize the coated film. Namely, paint is infiltrated into the embossed wooden-grain pattern, hence the color tone on the coated part is deepened, the wooden-grain pattern is clarified, and the wooden feeling is significantly enhanced.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a method for producing synthetic resin extrusion molded products mainly used as interior materials for buildings, and in particular, the present invention relates to a method for producing synthetic resin extrusion molded products mainly used as interior materials for buildings, and in particular, embossing is applied to the surface of the molded products. It is characterized by making the embossed pattern clear by applying paint.

-1= (Prior Art) Conventionally, synthetic resin extrusion molded products have been used instead of wooden members for highly processed building materials such as door mounting frames. This material is made of a mixture of hard vinyl chloride resin and several tens of percent wood flour, and is pre-formed into the desired shape, requiring significantly fewer processing steps than wooden parts.
Furthermore, construction is extremely easy as it can be cut with a saw and nailed. However, on the other hand, conventional materials have a much higher specific gravity than wooden materials, and their surfaces are hard and do not have a woody feel. , its use was limited due to its low affinity with adhesives and paints, making it unsuitable as a material for housing.

As a measure to solve this problem, the present inventors added a few percent of a foaming agent to the above-mentioned material resin and performed low-foaming extrusion molding to make the specific gravity of the molded product almost the same as that of the wooden member. He has invented a method to make molded products visually and tactilely similar to wood by removing the skin layer that forms on the surface of the product, and to improve compatibility with adhesives and paints, and has already patented the method. An application has been filed (Japanese Patent Application No. 165204/1983).

By the way, the above-mentioned molded products are embossed in the form of narrow grooves to create a wood grain pattern on the surface, and then painted on top of that, but since the conventional painting method is simply spray painting, the paint is not embossed. Because it does not enter the part where
There was a problem in which the pattern had shading, damaging the wood feel.

The present invention solves the above-mentioned conventional problems and injects paint into the embossed pattern to darken the color of this area, thereby making the wood grain pattern clearer and further enhancing the wood feel. .

(Structure of the Invention) The present invention involves extrusion molding a molded product having a predetermined cross-sectional shape,
Next, the skin layer formed on the surface is removed and embossed, then the surface is spray painted, the surface is rubbed with an elastic material to get the paint into the embossed pattern, and finally Brushing eliminates shading patterns caused by rubbing.

(Examples) Hereinafter, the present invention will be specifically described based on illustrated examples.

In the figure, numeral 1 is a synthetic resin extrusion molding machine, 2 is a cooling machine, and 3 is a drawing machine. These are similar to ordinary extrusion molding equipment, and a molding die 4 is attached to the extrusion molding machine 1 so as to continuously mold a molded product having a predetermined cross-sectional shape. A synthetic resin molding material containing several tens of percent of wood flour, several percent of a blowing agent, a stabilizer, a reinforcing agent, etc. is supplied to the extrusion molding machine 1, and a molded product having a cross-sectional shape as shown in FIG. Form A. A sander 5 is installed in front of the extrusion molding device to remove the skin formed on the surface of the molded product A to make the surface of the molded product a matte finish, and at the same time remove the countless small pores formed by the wood flour and foaming agent. This enhances the woody feel of molded product A and improves its affinity with paint. Embossing machine 6 is in front of sander 5
is provided, and the surface of the molded product A that has reached this position is embossed.

The embossing machine 6 has a large number of protrusions protruding from the surface of a press roll in a wood grain pattern.The press roll is brought into pressure contact with the molded product A, and the protrusions are inserted into the surface of the molded product A to form the product. A wood grain pattern with narrow grooves is drawn on the surface of item A.

Furthermore, a spray coating machine 7, a rubbing machine 8, and a brush 9 are provided in front of the embossing machine 6, and a predetermined amount of paint is sprayed on the embossed surface of the molded product A, and then the coated surface is A block with appropriate elasticity such as polyurethane foam is brought into light contact with the surface and rubbed, allowing the paint to enter the narrow grooves formed by embossing. A streaky shading pattern appears on the painted surface of molded product A due to rubbing, so this is corrected with the brush 9 to make the entire painted surface uniform.
The paint film is then dried according to conventional methods, and a clear lacquer is applied to finish.

(Effects of the Invention) As detailed above, the present invention is capable of removing a skin layer formed on the surface of an extrusion molded product, which is mainly used as an interior material for buildings, by extruding it from an extrusion molding machine and embossing it. Then, a predetermined amount of paint is spray-painted on this material, and an elastic material is brought into contact with the material and rubbed against it. The pattern appears clearly, and the streaky shading pattern that appears on the surface of the processed material due to rubbing is erased by the brush.
Since a uniform coating surface is formed, it is possible to obtain a product with a high wood feel.

[Brief explanation of the drawing]

FIG. 1 is an explanatory view showing the manufacturing process of the present invention, and FIG. 2 is a perspective view showing an example of a molded product. 1; Extrusion molding machine 2: Cooling machine 3; Drawing machine 4; Molding die 5; Sander 7; Spray coating machine 6; Embossing machine

Claims (1)

[Scope of Claims] A molded product having a predetermined cross-sectional shape is molded using a synthetic resin molding material mixed with wood flour or other materials, the surface of the molded product is embossed, and a predetermined amount of paint is spray-painted on the surface. The painted surface is then rubbed with a block with appropriate elasticity to introduce the paint into the narrow grooves created by embossing, and then a brush is applied to the painted surface to make the paint film uniform. A method for producing an extrusion molded product having an embossing pattern.