JPH08238900A - Manufacture of mother-of-pearl inlay decorative resin molding - Google Patents

Abstract

PURPOSE: To easily manufacture a beautiful ware having mother-of-pearl inlay decoration by polishing the surface side of a molding dispersed with shell pieces in a predetermined shape by thermally pressurizing a tablet, and further clear coating the polished surface. CONSTITUTION: Thermosetting resin material 1 made of powder and pellet is filled in a form 2 made of a bottom plate 2a and a peripheral frame 2b. Then, the resin material filled in the form 2 is coated with shell pieces for mother-of-pearl inlay in a predetermined pattern, the entirety is filled in a preheater, and preheated under non-pressure by high-frequency heating. As a result, the curing of the material 1 is started, and the entirety is integrated by the bonding of the powder or the pellet to each other. When it is removed from the form 2, the shell pieces 3 are adhered fixedly to the surface of the tablet 10. The embodiment of the material is phenol resin, or melamine resin.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a beautiful lacquer ware-like synthetic resin molded product having a decoration of a spiral hook.

[0002]

2. Description of the Related Art Raden is a product in which the pearl-emitting portion of a shell such as a nautilus or abalone shell is cut out and fitted into the surface of a container, and a beautiful decorative effect can be obtained by the luster of the shell piece. Since ancient times, it has been used to decorate various items such as lacquer ware.

However, in the past, in the case of applying such a spiral decoration, after painting the base material of the vessel and pasting the shell pieces, the surface thickness of the shell pieces was filled to the surface of the vessel. In addition, in order to expose the surface of the shell piece, it is necessary to repeat painting and polishing many times, which is very time-consuming and time-consuming, which is a disadvantage of being extremely expensive.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned circumstances, an object of the present invention is to provide a method for extremely easily manufacturing a container having a decoration of a screw using a synthetic resin as a base material.

That is, according to the method for producing a decorative resin molding of a spiral lantern according to the present invention, a molding material mainly composed of a thermosetting resin is filled in a frame, and a shell piece for a spiral lantern is sprinkled on the mold, followed by preheating. To form a tablet, and the tablet is heated and pressed by press molding to form a molded body of a required shape, and the surface side of the molded body on which the shell pieces are scattered is abraded,
Further, it is characterized in that a clear coating is applied on the polished surface.

[0006]

[Function] A molding material mainly composed of a thermosetting resin is generally used in a powder form or a pellet form, and when this is filled in a formwork, and a shell piece for a screw hook is sprayed and preheated (preheating), Curing of the thermosetting resin material begins to proceed, and the powders or pellets are bound to each other so that the whole is integrated into a tablet shape, and the scattered shell pieces are also attached and fixed to the surface of the tablet. Therefore, after that, the whole can be handled as an integrated body, and the scattering pattern of the shell pieces, that is, the set decorative pattern is not disturbed during the handling. In addition, since it is not necessary to pressurize during this preheating, a tablet machine for compacting is unnecessary.

However, in the method of spraying the shellfish shellfish pieces after preheating, the surface of the tablet is hardened to some extent, so that the shellfish piece is not easily fixed to the tablet surface and the decorative pattern set in the subsequent handling is maintained. It is difficult to do so, the workability is poor, and gas is generated from the tablet due to the curing reaction, so there is a concern that the health of the sprayed worker may be impaired.

In press molding, the tablet obtained by preheating is heated and pressed between the upper and lower molds to form a desired container shape. The shell pieces protruding on the tablet surface by this molding are embedded in the base material (resin). As a result, the surface of the molded product becomes substantially flat. With this press molding, however, some of the shell pieces have resin that wraps around the upper surface and is partially or wholly buried to hinder the pearl luster.
By the subsequent polishing, the entire surface of the shell piece is carved out, and the surface of the molded product is completely flattened. Since this polished surface is covered with a transparent resin layer by the following clear coating, it is protected without impairing the pearl luster of the shell piece and the surface color of the base material, and thus a lacquer ware-like resin molded product with a beautiful spiral decoration. Is obtained.

[0009]

EXAMPLES The method for producing the thread-shaped decorative resin molding of the present invention will be described in detail below with reference to the illustrated examples. First,
As shown in FIG. 1 (A), a thermosetting resin material (1) made of powder or pellets is filled in a mold (2) composed of a bottom plate (2a) and a peripheral frame (2b). Examples of the thermosetting resin material (1) include general thermosetting resin components such as phenol resin, melamine resin, urea resin, and polyester resin, a coloring agent such as a pigment, and various additives as necessary. A colored resin composition containing is used. As the peripheral frame (2b) of the mold (2), a shape corresponding to the outer shape of the object (molded article) to be manufactured, for example, when the outer shape of the object is circular, an annular shape is used.

Next, on the thermosetting resin material (1) filled in the mold (2), shell pieces (3) ... Figure 1
As shown in (C), the preheater (4) is loaded and preheated by high-frequency heating or the like without pressure. As a result, the hardening of the thermosetting resin material (1) begins to proceed, and the powder or pellets are integrally bound to each other. The tablet (10) is obtained. Then, the scattered shell pieces (3) are attached and fixed to the surface of the tablet (10).

The above tablet (10) is placed on the lower die (5a) of the press molding machine (5) as shown in FIG. 1 (D), and the upper die (5b) is lowered under heating, By heating and pressurizing between the upper and lower molds (5a) and (5b) as shown in 2, a molded product (11) having a predetermined shape such as a tray shown in FIG. 4 is obtained. The heating temperature in this press molding varies depending on the type of resin component of the thermosetting resin material (1), but is generally 1
The temperature is about 60 to 170 ° C., and the heating time is about 2 minutes.

In the molded product (11) after curing, the shell piece (3) protruding from the surface of the tablet (10) is embedded in the base material (resin), and the surface is substantially flat. However, among the shell pieces (3), there are some pieces of resin that wrap around the upper surface and are partially or wholly buried as shown in FIG. 5 so that the pearl luster cannot be sufficiently expressed. Therefore, this surface is polished and the buried shell piece (3) ... is carved out as shown in FIG. 6 to expose the entire surface,
The entire surface of the molded product (11) is flattened. This polishing is usually performed manually using a hand-held polishing machine equipped with sandpaper or a polishing head, but it is also possible to use an appropriate automatic polishing machine.

The molded product (11) after polishing is subjected to clear coating using a transparent resin such as urethane resin. By this clear coating, as shown in FIG. 7, the polished surface (11a) exposing the surface of the shell pieces (3) ... Is transparent and transparent resin layer (6).
Since it is coated with, the pearl luster of the shell pieces (3) and the surface color of the thermosetting resin material (1) that is the base are protected without being impaired, and thus a lacquer ware-like resin molding with a beautiful spiral decoration. The thing is obtained. It should be noted that such clear coating is sufficient for a single coating, but not only the polished surface (11a) exposing the surface of the shell pieces (3) but also the molded product (11).
May be applied to all surfaces.

The screw-shaped decorative resin molded product of the present invention is not limited to the tray shape as shown in the drawing, but can be various shapes such as a dish shape, a box shape, a flat plate shape, and the plane outer shape is circular, polygonal, elliptical, etc. There is no restriction at all, and the thickness of the base material, the thickness of the shells (3), ..., The size, the shape, the amount of spray, the thickness of the transparent resin layer (6), etc. can be variously set.

[0015]

According to the manufacturing method of the present invention, using a synthetic resin as a base material, it is possible to extremely easily manufacture a container having a beautiful decoration of a spiral hook in a short time, and to significantly reduce the manufacturing cost as compared with the conventional method. In addition, it has the advantage that the decorative surface of the dish of the vessel is smooth and the finish is good and the quality is high. In addition, all of the used shell pieces effectively function as a pearl shell that emits pearlescent light, and there is no waste of material due to burial.

[Brief description of drawings]

1A and 1B show a method of manufacturing a screw-shaped decorative resin molded product according to an embodiment of the present invention in the order of steps, in which FIG. 1A is a vertical cross-sectional side view of a mold filled with a thermosetting resin material;
(B) is a vertical cross-sectional side view of a state in which the shell pieces for a hook and shell are sprinkled on the surface of the filled thermosetting resin material, (C) is a vertical cross-sectional side view during preheating, and (D) is a vertical cross-section before molding in a press molding machine. Side view.

FIG. 2 is a vertical sectional side view of a press-molded state in the example.

FIG. 3 is a perspective view of the tablet after preheating in the example.

FIG. 4 is a vertical sectional side view of a press-formed product in the same example.

FIG. 5 is an enlarged vertical sectional view of the main part of the molded product.

FIG. 6 is an enlarged vertical cross-sectional view of the main part of the molded article after polishing.

FIG. 7 is an enlarged vertical sectional view of a main part of the molded article after clear coating.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Thermosetting resin material 2 ... Formwork 3 ... Shell shell piece 4 ... Preheater 5 ... Press molding machine 5a ... Lower mold 5b ... Upper mold 6 ... Transparent resin layer 10 ... Tablet 11 ... Molded product

Claims (1)

[Claims] 1. A molding material containing a thermosetting resin as a main component is filled in a mold, and a shell piece for a spiral hook is sprinkled on the mold,
A tablet is formed by preheating, the tablet is heated and pressed by press molding to form a molded body of a required shape, the surface side of the molded body on which the shell pieces are scattered is polished, and clear coating is further applied to the polished surface. A method for producing a resin decorative resin molding characterized by: