JP2002067133A - Grain-like blow molded product, method for manufacturing the same, and blow mold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grain-like blow molded product not inferior to genuine wood not only in appearance but also in feel, a method for manufacturing the same and a blow mold for blow molding. SOLUTION: A grain-like panel 1 of blow molded product is obtained by the blow molding of a thermoplastic resin material. Recessed, projected or uneven grain stripes 4 are formed to the surface of the grain-like panel 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an interior wall of a building,
Architectural plastic moldings such as partitions and doors,
Plastic moldings for automotive interiors such as console boxes, armrests, cargo floor boxes, etc., plastic moldings for furniture such as storage cabinets, chairs and beds, and other plastic moldings with a real woody appearance on the surface. The present invention relates to a woodgrain blow-molded product, a method for producing the same, and a blow-molding mold.

[0002]

2. Description of the Related Art Conventionally, a blow-molded article having a woodgrain pattern on its surface is described in Japanese Patent Application Laid-Open No. Hei 8-216233.

[0003]

By the way, the blow-molded article described in the above-mentioned Japanese Patent Application Laid-Open No. Hei 8-216233 has a planar pattern even if it has a woodgrain pattern on its surface. Therefore, even if it looks like wood, it is merely a plastic product with no woody feel.

Accordingly, the present invention relates to a blow-molded article made of a thermoplastic resin, which is excellent in appearance and feel and is not inferior to real timber, a method for producing the same, and a method for blow-molding the same. It is intended to provide a mold.

[0005]

According to the present invention, a wood-grained blow-molded article according to the present invention is a blow-molded article obtained by blow-molding a thermoplastic resin material,
It is characterized by forming a concave, convex or irregular wood grain on its surface.

Further, according to a second aspect of the present invention, there is provided a woodgrain-like blow-molded article having a woodgrain pattern formed on the surface of the blow-molded article by a resin layer having a color tone different from that of a base resin constituting the blow-molded article. The woodgrained blow-molded article according to claim 1, characterized by forming:

According to a third aspect of the present invention, there is provided a method of manufacturing a blow-molded article obtained by blow-molding a thermoplastic resin material, wherein the cavity has a concave shape. By using a mold for blow molding that forms a convex or irregular wood grain formation surface, a parison is arranged between the molds, and blow molding is performed to form a concave, convex or irregular grain grain on the surface. It is characterized by obtaining a blow molded product.

According to a fourth aspect of the present invention, there is provided a method for producing a woodgrain-like blow-molded article, wherein a parison obtained by kneading a resin having a different color tone from a base resin constituting the blow-molded article is blown. The method for producing a woodgrain blow-molded article according to claim 3, wherein the molded article is molded.

According to a fifth aspect of the present invention, there is provided a mold for blow molding, wherein the cavity has a concave, convex or irregular wood grain line forming surface.

Further, the blow molding die according to the present invention comprises:
According to a sixth aspect of the present invention, there is provided the blow molding die according to the fifth aspect, wherein the cavity is formed as a grain line forming surface by a photoengraving method.

[0011]

1 and 2 show a woodgrain panel as an example of a woodgrain blow-molded product according to the present invention. FIG. 1 is a perspective view thereof, and FIG. It is a detailed sectional view in the direction of the arrow. FIG. 3 is a cross-sectional view showing a blow molding mode of the woodgrain panel shown in FIG. 1, and FIG. 4 is a detailed perspective view showing a part of the blow molding die shown in FIG.

1 and 2, reference numeral 1 denotes a woodgrain panel. The woodgrain panel 1 is formed by blow molding a thermoplastic resin, has a hollow double wall structure, and has a woodgrain pattern 3 having a color tone different from that of the base resin 2 on the surface of the constituent wall. And wood grain lines 4 are formed in the base resin 2 and wood grain pattern 3.
The wood grain line 4 has a concave, convex, or uneven shape on the surface like a shaving streak or a build-up streak, and has the same form and feel as real wood together with the wood grain pattern 3. It is formed in. In other words, in real wood, in addition to the streaks of annual rings such as straight-grained and plate-grained, fine streaks appear due to pipes, etc., and different color patterns appear in the woody part between the annual rings, In the woodgrain panel 1 according to the invention, a woodgrain pattern 3 and a woodgrain line 4 equivalent to real wood are formed on the surface of the constituent wall.
The surfaces of the constituent walls are surfaces of the front wall 5, the back wall 6, and the peripheral end wall 7, and the grain pattern 3 and the grain line 4 are formed on all or a part of them. 8 is a hollow part.

The woodgrain panel 1 shown in FIG. 1 and FIG.
Blow molding is performed in the mode shown in FIG. In FIG.
Reference numerals 9 and 10 denote blow molding dies. The cavities 11 and 12 of the blow molding dies 9 and 10 form a wood grain line forming surface 13 having a concave, convex or irregular shape as shown in FIG. ing. Reference numeral 14 denotes an uneven portion for that purpose.

Cavities 1 of blow molding dies 9 and 10
It is preferable to use the photoengraving method to make the wood grain line forming surfaces 13 of the first and the second wood patterns. That is, the cavities 11, 12
The surface of the photosensitive material layer is used as a photosensitive material layer, a negative or positive image of a photographic film is printed on the photosensitive material layer, and then washed with water to remove the unexposed photosensitive material. Surface of wood grain formation 13 after chemical treatment with acid etc.
To form The photosensitive material layer remaining after being exposed and cured is separately processed and removed. The adjustment of the depth of the grain streaks forming surface 13 can be performed by repeating this process a plurality of times.

In blow-molding the woodgrain panel 1, as shown in FIG. 3, the dies 9, 10 are opened, and the parison 16 extruded from the head 15 between the dies 9, 10 is opened.
Place. The parison 16 extruded from the head 15
Pigment is kneaded on a base resin material, for example, a polypropylene resin so as to give a wood grain pattern. Then, if the molds 9 and 10 are closed and a pressurized fluid is introduced into the parison 16 to perform blow molding, a hollow panel along the cavities 11 and 12 of the molds 9 and 10 is formed. On the surface of the constituent wall, a grain line corresponding to the grain line forming surface 13 of the cavities 11 and 12 is formed.

The thermoplastic resin constituting the woodgraining panel 1 may be any thermoplastic resin as long as it can be blow-molded, such as polyethylene resin, polypropylene resin, vinyl chloride resin, or the like.
An ABS resin (acrylonitrile-styrene-butadiene resin), a polyamide resin, a polystyrene resin, a polyester resin, and further, engineering plastics such as a polycarbonate resin and a modified polyphenylene ether are preferable.

Examples of the pigment for producing a wood grain pattern and the pigment for producing a wood grain pattern include, for example,
Inorganic pigments such as carbon black, oxides of various metals, sulfides, and sulfates, or phthalocyanine-based, quinacridone-based, and organic pigments such as benzidine-based pigments can be used. It is blended with the resin so that the desired color tone is obtained.

[0018]

According to the present invention, there is provided a blow-molded article obtained by blow-molding a thermoplastic resin material. The blow-molded article is formed by forming a concave, convex or irregular wood grain on its surface. Even if it is a blow-molded product made of resin, it is possible to provide an excellent product not only in appearance but also in feel that is not inferior to real timber.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a woodgrain panel which is an example of a woodgrain blow molded product according to the present invention.

FIG. 2 is a detailed cross-sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view showing a blow molding mode of the woodgrain panel of FIG. 1;

FIG. 4 is a detailed perspective view showing a part of the blow molding die shown in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Woodgrain panel 2 Base resin 3 Woodgrain pattern 4 Woodgrain 5 Front wall 6 Back wall 7 Peripheral end wall 8 Hollow part 9,10 Blow mold 11 and 12 Cavity 13 Woodgrain formation surface 14 Irregular part 15 Head 16 Parison

Claims (6)

[Claims] 1. A blow-molded article obtained by blow-molding a thermoplastic resin material, wherein the grain-like blow-molded article is formed by forming a concave, convex, or uneven wood grain on the surface thereof. Goods. 2. The woodgrain-like blow-molded article according to claim 1, wherein a woodgrain pattern is formed on the surface of the blow-molded article by a resin layer having a color tone different from that of a base resin constituting the blow-molded article. . 3. A method for producing a blow-molded article obtained by blow-molding a thermoplastic resin material, comprising using a blow-molding mold having a concave, convex, or uneven wood grain formation surface, A method for producing a woodgrain-like blow-molded article, wherein a parison is arranged between molds and blow-molded to obtain a blow-molded article having a concave, convex, or uneven wood grain on the surface. 4. The method for producing a woodgrain-like blow-molded article according to claim 3, wherein a parison obtained by kneading a resin having a different color tone from the base resin constituting the blow-molded article is blown. 5. A blow mold according to claim 1, wherein the cavity has a concave, convex or irregular wood grain formation surface. 6. The blow molding die according to claim 5, wherein the cavity is formed as a grain line forming surface by a photoengraving method.