JPS5812146B2 - What is the most important thing to do? - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for forming a pseudo-stone pattern on a synthetic resin product.

Recently, synthetic resin products have been occupying a large proportion of living spaces such as houses and hotels.

Although synthetic resin products are extremely easy to manufacture, they have the disadvantage that the products themselves, such as wash basins and bathtubs, are too bland. There are many attempts to make up for it.

As such, coloring agents are mixed into synthetic resins such as unsaturated polyester with hardening agents and fillers.
One example is one in which a pattern is created by kneading and uneven coloring that occurs depending on the degree of kneading, and the pattern is heated and pressed to obtain a molded product.

However, some people dislike it because the pattern is too regular and it doesn't give the feel of natural stone.

Therefore, the present invention attempts to eliminate the hobby-related drawbacks of synthetic resin products by using a method for forming a pseudo-stone pattern on synthetic resin products that can depict irregular patterns.

Hereinafter, the pattern forming method will be explained in accordance with the drawings.

First, a filler such as calcium carbonate is added to a mixture of an unsaturated polyester resin and its curing agent to form a molding base material for a synthetic resin product.

Then, an appropriate amount of coloring agent is added to this molded base material.

The coloring agent may be used in a single color or in multiple colors depending on the desired color retention and pattern.

In this case, the synthetic base material is 25 parts (by weight) of a mixture of unsaturated polyester resin and curing agent, and 75 parts of filler.
(weight) parts.

The blending ratio may be changed depending on the viscosity of the resin and the oil absorption amount of the filler in order to obtain a compound with an appropriate viscosity.

Then, the molding base material to which a coloring agent has been added is kneaded to form a spherical molding material 1 of an arbitrary size.

This spherical molding material 1 is spread over a lower die 10 of a mold as shown in FIG. 1, and pressed using an upper die 11 to form a sheet 2 as shown in FIG. 3.

This sheet 2 is then press-molded as shown in FIG. 4 to obtain a molded product 3 such as a wash basin.

In such a process, when the spherical molding material 1 is pressed, the pattern of the molding material spreads around the periphery, creating an irregular pattern, and the uniform pattern of the synthetic resin molded product is removed. .

It is also possible to change the pattern by varying the size of the spherical molding material 1.

Further, by changing the ratio of the amount of resin to the amount of filler in the molding base material, and by adding materials with different flow characteristics, it is possible to further vary the pattern of molding.

Of course, the molding process is performed by heating and pressurizing the material within the mold.

As described above, according to the present invention, a spherical object is formed from a molding material, a plurality of these are crushed to form a sheet, and a synthetic resin molded article is obtained based on this sheet. Various changes can be made to the pattern drawn depending on the size and number, and a pattern similar to that of natural stone can be formed on a synthetic resin molded product.

[Brief explanation of drawings]

Figures 1 and 2 are explanatory diagrams showing the process of forming a sheet from spherical molding material, Figure 3 (a) 20 is a plan view showing the pattern of the obtained sheet, and Figure 4 is an explanatory diagram of the molding state. . 1... Molding material, 2... Sheet.

Claims (1)

[Claims] 1 A curing agent and a filler are added to unsaturated polyester resin to form a molding base material, a coloring agent is mixed with this molding base material to form a spherical molding material, and then this spherical molding material is placed in a mold. A method for forming a pseudo-stone pattern on a synthetic resin product, characterized in that a large number of them are placed and compressed to form a sheet, and the sheet is heated and compression molded to obtain a molded product.