JPH10634A - Method for coloring plastic molding surface - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the expression of a color close to a natural tree skin and the feel of a material possible easily by a method in which a filler of a color different from the basic color of a product is applied on part of the product surface of a mold, a coating of the basic color is applied on the whole product surface of the mold, a resin is cast into the mold, and the product is demolded after the resin being solidified. SOLUTION: A filler of a color different from a basic color is applied directly to a joint and a part corresponding to a projection of a tree skin to be the product surface of a mold. It is recommended to use the filler of a color deeper than the basic color. Next, the whole product surface of the mold is coated with a coating of a color to be the basic color. In the next molding process, a resin is cast into the mold coated with the filler and the coating of the basic color. After the resin being solidified, a molding process is started. The demolded product is a molding mold which is already colored.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coloring method for coloring a molding surface of a plastic molded product resembling bark.

[0002]

2. Description of the Related Art As a design of a flower pot or a pot receiver, there is a bark-like thing. Among them, some were colored to make them look more authentic, but in many cases the painting on the product surface was more complicated than the real one.

[0003] A molded product is obtained by pouring a resin into a mold, curing the resin, and then removing the mold. There are roughly two conventional methods for coloring molded articles. First, after molding with resin, the base color of the bark is painted on the molded product with a brown color. The other is that after coating the mold in advance, the resin is poured, and when the mold is removed, the molded product is colored.

[0004] However, the real bark is not a single color, but when closely observed, a plurality of colors are mixed. Therefore, a molded product may be shaded using two or more colors to give a more realistic feeling. Usually, it is not possible to take time and effort in the process. Therefore, in addition to the base color, only one dark color is used and expressed in two colors. Applying this dark color partially to the bark and joints increases the realism.
In this way, depending on how to apply the complementary color, it may or may not look real or not.

[0005]

Normally, a complementary color is applied on a molded product which is entirely coated with a base color. However, the method of applying a complementary color later is difficult to express unless a skilled person is used, and is not suitable for mass production.

[0006] Also, as a major feature of general bark,
The raised parts such as the joints are darkened by moss and dirt, and the surface is rough and dull. Therefore, if a filling material with a rough texture is applied to the joints as a complementary color, it looks more genuine, but the filling material is difficult to apply on the painted surface, so spray clear (transparent paint) from above to fix it. A process is required. Then, when the clear material is applied, the rough texture of the sealing material is impaired, and the other parts become unduly glossy.

[0007] The present invention aims to express the color and texture closer to the real bark by a simple method in coloring the product surface that resembles the bark of a plastic molded product.

[0008]

First, a coating is applied to the product surface of the mold. First, a filling material colored in a color different from the base color is directly applied to a portion corresponding to a knot or a raised protrusion of the bark, which is a product surface of the mold. It is preferable to use a filler material that is colored darker than the base color. Next, from above, the entire product surface of the mold is painted with a paint of a base color. After doing so, move on to the molding process. Pour the resin into a mold that has been filled with the filling material and the base color paint. And
When the resin has hardened, the process proceeds to the demolding process. The product removed from the mold becomes a molded product, which has already been colored.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS By molding according to the above procedure,
The filling material is fixed to the base color paint and the fixing of the resin is further strengthened by the pressure of the resin in the process of solidifying the resin.
Therefore, the step of applying clear can be omitted. Then, the bark surface of the finished molded product is applied with a filler material partially, and the moss and dirt can be expressed with a rough texture and a color different from the base color of the filler material, so that it looks more authentic.

For example, when expressing the bark of a general tree, realism can be obtained by using brown as a base color and using dark brown darker than the base color for the color of the filling material.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, as an embodiment of the present invention, a process for producing a pot receiver having a birch-like bark pattern on the outside will be described. The raw material of the molded product is urethane foam. The mold of the molded product uses a silicone mold made of elastic silicone rubber.
In order to make a molded product with irregularities and a complicated shape without a seam around the mold, the elastic silicon mold is suitable for demolding. By the way, birch is characterized by its bark base color being white, with small, long and prominent brown spots in the bark, and with joints and rotten portions in some places. Therefore, a portion corresponding to the spots and knots of the bark, which is the product surface of the mold, is painted with a dark brown coloring filling material with a brush or a finger. In particular, if you paint carefully at the joints, you will feel more realistic. next,
After the filling material is applied, the entire surface of the silicon-type product, that is, the entire bark surface is painted with a white paint that is a base color of birch. Then, the silicon mold is set on a frame, and the resin is poured. When the resin is hardened, the silicon mold is released. Then, in the molded product, spots and knots are formed in the white bark by the filling material. No post-coating is required and this is the product as it is.

Also, instead of a tree of a special color such as birch,
When expressing the bark of a general brown tree, the base color is brown, and the color of the filling material is dark brown, which is darker than the base color.

Further, according to this method, not only the convex portions on the product surface but also the concave portions can be provided with the filler. For example, when the bark pattern is rough and has many irregularities, such as a pine tree, it is desirable to darken a concave portion such as a broken portion. Such a concave portion is a convex portion having a sharp standing shape in the mold, and a filling material having a dark color is applied to the side surface of the convex portion. Then, the concave portion of the molded product can also be expressed in black.

When a mold made of a relatively brittle material such as silicone rubber is used, the concave portion of the mold is filled with a filling material, so that when the mold is removed, a portion of the mold that does not have a slope is not caught. And the effect that the silicon mold lasts longer.

[0015]

According to the present invention, it is possible to express moss and dirt on the protrusions of the bark, such as joints, with a rough texture and color tone different from the base color, thereby making a molded product that looks more like a real bark. It becomes possible with a small number of steps.

[Brief description of the drawings]

FIG. 1 is a flowchart showing the procedure of the present invention.

Claims (1)

[Claims] 1. A method for coloring a product surface resembling the bark of a plastic molded product, wherein a filling material having a color different from the base color of the product is applied to a part of the product surface of the mold, and the base material is colored on the entire product surface of the mold. A method for coloring a plastic molded surface, comprising: applying a color paint, flowing a resin into the mold, curing the resin, and removing the resin.