JPH07227643A - Manufacture of cast accessories - Google Patents

Abstract

PURPOSE:To simply and realistically manufacture a material to be represented by adopting a realistic rugged form obtd. with a form plate for printing through a photolithography to a display form at the time of manufacturing a wax pattern used to a manufacturing process of a cast accessories. CONSTITUTION:A pet A is photographed and a photosensitive treatment is executed to a sensitive plate with a negative film 1 and the etching is applied to obtain the print 2 for printing of the positive or the negative figure. In the case of using the form plate 2 for printing to an original pattern, a pendant shape and a runner as the prescribed way is provided in a pre-mold 4A for original pattern. Then, a recessed part 41 is arranged at the prescribed position and the print 2 for form plate or a pattern body 2A printed from the print 2 for printing is stuck to make the original pattern. The original pattern is covered with a crude rubber 3a and vulcanized, and after dividing, the original pattern is taken out to make a rubber mold 3. Wax is poured into this rubber mold and many wax patterns 5 are formed and a sprue 6 is fitted to form a tree pattern 7. This tree pattern is covered with molding material 8 and after degassing, hardening and burning, a mold 9 is manufacture. Then, molten metal 10 is poured into the mold 9 to obtain a cast product 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing accessories such as pendant tops, broaches, rings, etc., which are produced by casting.

[0002]

2. Description of the Related Art Lost wax method is generally adopted for precious metal accessories produced by casting. Briefly, the prototype to be manufactured (metal engraving, wooden pattern,
Resin) is formed, and the master is coated with raw rubber and vulcanized to have elasticity to form a rubber mold. The rubber mold is divided and the master is taken out, and a wax pattern (wax pattern) is obtained by wax injection. Model) is formed, and a sprue is attached to the wax model to form a tree model. After covering this tree model with a mold material (eg plaster) and hardening it, baking is performed to remove the wax, molten metal is poured into the mold, and the mold is destroyed after cooling,
It is to be appropriately finished.

[0003]

In the production of precious metal accessories by the casting described above, in order to make them souvenirs,
There are cases in which an object that represents the person, pet, or building that should be commemorated is produced.

However, in a casting that expresses such a real object, since the casting model is basically hand-worked, it has a very high level of skill to manufacture it exactly like the object to be expressed. It was difficult to manufacture efficiently. Therefore, the present invention proposes a novel manufacturing means that enables a realistic expression easily.

[0005]

According to the method of manufacturing a casting accessory of the present invention, a wax model is manufactured based on a relief plate for printing obtained by photoengraving of a real object, and a known lost model is produced using the model. It is characterized by being produced by the wax casting method.

[0006]

The negative or image-captured image of the object to be displayed is transferred onto the original plate coated with the photosensitive material, and the printing plate is obtained by etching the exposed or non-exposed area. In this printing plate, since the object to be displayed is realistically copied in an uneven shape, this uneven shape is transferred to a predetermined position of the wax model of the lost wax casting method, and the lost wax means is cast as usual to display the object. You can get metal accessories that realistically represent things.

[0007]

EXAMPLES Next, examples of the method of the present invention will be described.
A case will be described in which the accessory to be produced is a pendant head (accessory) B that displays a pet (cat: object to be displayed) A in a relief shape. The pendant head is produced through a photoengraving production process, a wax model production process, and a casting process. In the photoengraving production process, the same means as in the conventional photoengraving process is adopted.

That is, a photograph of the pet A is taken, a photosensitive plate having a photosensitive protective film or photosensitive material coated on the surface thereof is subjected to a photosensitive treatment with the negative 1, and a photosensitive portion or a non-photosensitive portion is etched to obtain a positive or negative printing plate. Get 2. Specifically, a resin substrate is etched with water or alcohol, a rubber substrate is etched with a developing treatment solution,
It is known to etch a zinc base plate with nitric acid, and any one may be adopted.

Next, a wax model is manufactured, and it is only necessary that the wax model can finally obtain a rubber model of a predetermined wax model. Either the printing plate is used as the master 4 or the rubber model is used. Either used or adopted.

The former is formed by forming a prototype front mold 4A with a pendant top shape and a runner's channel as required and forming a recess 41 at a predetermined position (front of the pendant).
The printing plate 2 or the mold body 2A copied from the printing plate 2 is adhered to 1 to produce a prototype 4, and as before, the prototype 4 is covered with a raw rubber 3a and vulcanized to have elasticity. A mold 3 is formed, and this rubber mold 3 is divided into a master 4
And take out the rubber mold 3.

The latter has a convex portion 42 instead of the concave portion 41.
Using the prototype front mold 4B provided with, the rubber mold front mold 3A is coated with the raw rubber 3a and vulcanized to have elasticity to form the rubber mold front mold 3A, and the rubber mold front mold 3A is divided. The master mold front mold 4B is taken out, and then the printing plate 2 or a mold body 2 copied from the printing mold 2 to a predetermined position of the rubber mold front mold 3A.
A is bonded to produce a rubber mold 3.

When the rubber mold 3 is produced, wax is injected into the rubber mold 3 as in the conventional case, and a large number of wax patterns (wax model) are produced.
5 is formed and casting is performed as before. In the casting process, a tree model 7 is formed by attaching a sprue 6 to a large number of wax models 5, and the tree model 7 is covered with a mold material (for example, gypsum) 8, deaerated and hardened, and then fired to form the tree model 7. The wax constituting the mold is removed to produce the mold 9. Then, the molten metal 10 is poured into the mold 9, the mold 9 is destroyed after cooling, each casting crude product 11 is obtained, and finishing such as deburring, polishing, and polishing is appropriately performed to complete the product 12. Is.

The present invention is characterized in that the photorealistic uneven surface form obtained by a printing plate is used as a display form of an accessory produced by casting, and is limited to the pendant top as in the above embodiment. However, the present invention can be applied to other accessories such as rings and broaches, and the metal used is not limited to precious metals.

[0014]

INDUSTRIAL APPLICABILITY As described above, the present invention is a process of manufacturing an accessory in which a photorealistic surface-roughened pattern obtained by a printing plate by photolithography, in which a desired object is photographed and formed, is produced by casting. The present invention was used for the display form at the time of producing the wax model used in, and was able to be manufactured efficiently and easily in the same manner as the desired expressed object.

[Brief description of drawings]

FIG. 1 is a simple explanatory view of steps of an embodiment of the method of the present invention.

FIG. 2 is the same flowchart.

[Explanation of symbols]

 1 Negative 2 Printing Plate 3 Rubber Model 4 Prototype 5 Wax Model 7 Tree Model 9 Mold 12 Products

Claims (1)

[Claims] 1. A casting accessory characterized in that a wax model is produced based on a relief plate for printing obtained by photoengraving of a real object, and the wax model is produced by a known lost wax casting method. Production method.