JPH105021A - Production of ornamental accessory - Google Patents

Abstract

PROBLEM TO BE SOLVED: To join a metal of a high melting point and a metal a low melting point by manufacturing a was prototype in a rubber mold fitted with ornamental parts of the high melting point metal and casting the low melting point metal into a gypsum mold poured on its circumference. SOLUTION: The rubber mold is produced by pouring silicone rubber into the prototype of the ring manufactured of silver, solidifying the rubber and removing the prototype. The ornamental parts made of platinum are set in the prescribed position of the cavity of the rubber mold and molten wax is poured into the cavity, by which the wax prototype of the same shape as the shape of the prototype is manufactured. The wax prototype holding the ornamental parts therein is cured by pouring the gypsum to its circumference. The gypsum is subjected to calcination by heating and is made to remain in the state that the ornamental parts are held in the gypsum mold by evaporating the wax prototype in the gypsum and to generate the cavity of the same shape as the shape of the silver prototype. The different noble metal joined body integrally combining the ornamental parts made of the platinum with a base material of 18 gold is formed by melting the 18 gold by heating, casting the melt into the cavity of such gypsum mold and hardening the melt. The gypsum mold is destroyed and the joined body is taken out. The shape is trimmed to finish the joined body to the ornamental fittings.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for manufacturing ornaments by combining a plurality of metal materials, and for example, relates to a method for manufacturing earrings, pendants, rings and the like.

[0002]

2. Description of the Related Art As a method of manufacturing ornaments from precious metals, a lost wax manufacturing method is known. In this lost wax manufacturing method, first, a metal mold is prepared, placed in a mold, filled with silicone rubber, cured, molded into a rubber mold, cut into pieces, and the metal mold is removed. The molds are matched, and lost wax is filled in the mold to prepare a wax mold. Then, the wax mold is attached in a tree shape and is erected in a mold, filled with a gypsum material, cured, and fired to produce a gypsum mold having a casting cavity corresponding to the wax mold. Further, a molten metal of a metal serving as a base material of the ornament is poured into the air space of the gypsum mold, and after sufficiently congealing, the gypsum mold is broken to take out a tree-like connected body. The product is cut off to obtain the product, which is subjected to polishing or other surface treatment as appropriate.

[0003] In order to manufacture a decorative article combining different kinds of materials, a base metal and decorative parts are separately manufactured by using the above-mentioned lost wax method or the like, and grooves or small holes are formed in the base metal. A hole was formed, and the other decorative component formed in the same shape as the groove or the small hole was fitted into the hole, and the two were joined by brazing or caulking.

[0004]

However, when the shape of the groove or the small hole formed in the base material is fine, it is difficult to form the decorative part to be fitted in the same shape as the decorative part. When the number of small holes is large, there is a problem in that the number of steps for fitting the decorative component is large and it takes time and effort. In addition, the joining may be weak due to brazing or crimping, and there is a disadvantage that the fitted decorative component is easily detached from the base material.

In view of the above problems, the present invention utilizes a difference in melting point to arrange a decorative component made of a material having a high melting point in a rubber mold in advance to produce a wax mold in which the decorative component is embedded, and By using a wax mold to cast the low-melting metal that is the base material for jewelry, the manufacturing process is greatly simplified, and a method for manufacturing jewelry in which both metals are firmly joined is provided. The task is to do so.

[0006]

The present invention adopts the following configuration to solve the above-mentioned problems. That is, a step of obtaining a metal mold, a step of obtaining a rubber mold with this mold, a step of fitting a decorative component having a higher melting point than the base material of the ornament into the rubber mold, and obtaining a wax mold from the rubber mold. A step of casting gypsum around the wax mold and hardening it, and then heating and firing to evaporate the wax mold to form an air space; A step of heating and melting to the following temperature, pouring into the above-mentioned air space, and curing the air space.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a method for manufacturing a decorative article combining different materials by a so-called lost wax method, wherein a decorative part having a high melting point is previously fitted at a predetermined position in a rubber mold. A wax prototype is obtained in the form of holding the gypsum, and plaster is poured around the wax prototype, cured, heated and fired to evaporate the wax,
An air space corresponding to the wax prototype is formed in the gypsum mold, while the decorative part is left at a predetermined position in the air space. Therefore, if a base material made of a metal having a low melting point is cast and cured in the gypsum mold space, the melting point of the decorative component is higher than the temperature at which the metal is cast. , Without melting,
In addition, since the metal is hardened in a state of being fitted to the decorative component and forms a base material of the ornament, the base material and the decorative component are firmly joined and do not easily come off.

Since the decorative component is connected at the same time as the base material is cast, the joint surface of the strip of the decorative component to be fitted into the conventional base material is precisely machined, brazed or caulked. This eliminates the need for any process, greatly simplifies the manufacturing process compared to the related art, and eliminates the need for skilled work.

[0009] In some cases, grooves or small holes are formed in the wax mold, and decorative parts are fitted into the grooves, and it is considered that a decorative article is obtained by the same method. . That is, since a wax mold is generally not so elastic and quite brittle, it is difficult to set, for example, a relatively large decorative part or a large number of decorative parts in a groove or a small hole. It is not easy to attach a tree to a tree without falling off from the wax mold.

[0010]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples. This embodiment relates to a method of manufacturing a ring, and is used as a decorative component, that is, a platinum 900 as a material having a high melting point.
(90% by weight of platinum, 10% by weight of palladium), and 1 as a low melting point material to be a base material of the base ring.
Eight gold was used.

First, platinum 900 (with a melting point of about 160
(0 ° C.). The decorative component may be manufactured using a conventionally known method. Next, silver is joined, cut, polished, etc., and a ring prototype to be obtained is manufactured.Silicon rubber is poured around the prototype to be hardened, and this is cut out to remove the prototype. A rubber mold having a corresponding air space is manufactured. The decorative part is set at a predetermined position in the air space of the rubber mold, and after being re-molded, wax melted with high heat is injected into the air space to produce a wax master having the same shape as the master. This wax prototype is obtained with the decorative component held inside.

A plurality of wax prototypes holding decorative parts are welded to a wax base and connected in a tree shape, and plaster is poured around the periphery to harden. The gypsum is heated and baked to evaporate the wax mold in the gypsum to produce a gypsum mold.In the gypsum mold, the decorative parts remain in the state of being held in the gypsum mold, and the evaporated wax mold becomes A corresponding shape, that is to say an airspace of the same shape as the silver prototype, results.

In this gypsum mold, 18 gold is heated and melted at about 1000 ° C., cast, and hardened.
A dissimilar noble metal joint is formed by integrally combining a platinum 900 decorative component with an 8-gold base material. After the cast 18K is sufficiently set, the plaster mold is destroyed to remove the tree-like joined body, and at the same time, each of the different kinds of noble metal joined bodies is cut off from the main part, and this is subjected to appropriate polishing or other surface treatment. , To shape and finish the outfit.

Thus, the melting point of platinum 900 is 18
Since the temperature is higher than the temperature at which gold is cast, the decorative component is not deformed or melted even at the time of casting 18 gold. Also, the molten 18K hardens to form a base material in a state of being fitted to the decorative component, so that the base material and the decorative component are firmly joined and are not easily separated. And since the decorative component is joined at the same time as the base material is cast, the process of precisely processing, brazing or caulking the joint surface of the small piece of the decorative component to be fitted into the base material as in the related art is required. This is unnecessary, and the manufacturing process can be greatly simplified as compared with the related art.

In this embodiment, the noble metal is used as the decorative part. In addition, for example, jewelry which has high heat resistance such as diamond and is durable against the heat when casting the base material is used. Is also possible.

[0016]

According to the present invention, a decorative part made of a material having a high melting point is fitted in a rubber mold in advance, and wax is poured into the rubber mold to produce a wax prototype. Casting the base material made of low melting point metal into the gypsum mold to be hardened and joining the base material and the decorative parts at the same time, the brazing or crimping between the base material and the decorative parts This eliminates the need for steps, greatly simplifies the manufacturing process, and also eliminates the need for skilled work.
Furthermore, since the low-melting-point metal is melted and hardened in a state fitted to the decorative component to form the base material, the base material and the decorative component are firmly joined and are not easily separated.

Claims (1)

[Claims] 1. A step of obtaining a metal mold, a step of obtaining a rubber mold using the mold, a step of fitting a decorative part having a melting point higher than that of a base material of a decorative article into the rubber mold, and a step of waxing the rubber mold. A step of obtaining a prototype, a step of pouring gypsum around the wax prototype and curing, and then heating and firing to evaporate the wax prototype to form an air space; A process of heating and melting to a temperature equal to or lower than the melting point of the component, and pouring into the air space to cure the component.