JPH07108344A - Precision cast product and production thereof - Google Patents

Abstract

PURPOSE:To faithfully reproduce a shape and the texture of a natural material by using an organic body existing in the nature as a lost wax pattern, forming a refractory layer by applying the coating of a refractory on this lost wax pattern. Thereafter, casting is performed by using a mold manufactured by firing the refractory layer. CONSTITUTION:In the case of azalea 'bonsai', e.g. a wax-made sprue cup 2 and handle 3 are fitted to the root part of the bonsai 1 cut and water-washed. Thereafter, the coating is executed with the refractory slurry and immediately, the refractory sand is spread and the mold is formed and dried. Thereafter, the handle 3 is taken off and the mold is charged into a burning furnace so as to direct the sprue cup 2 downward and the burning is executed. The bonsai 1 part is carbonized by this burning, and a large part of the carbonized bonsai is falls down from the sprue mold and once cooled to the room temp. in order to perfectly clear in the mold and water-washed to remove the carbonized piece. Thereafter, the mold is again fired and an austenite stainless steel is cast. A shake-out is executed after casting and the cast product surface is finished by blast treatment after cutting off the sprue to obtain the stainless steel cast product of 'bonsai'.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a precision casting product of a metal having a shape and casting surface in which the shape (shape) of an animal, plant or other organism is used as it is, and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, in the precision casting method of metal, a wax model having the same shape as the shape to be obtained is manufactured, the wax model is attached to a runner, and then the surface of the wax model is fireproofed by coating with a refractory material. After forming the layers, the wax model is eluted in an autoclave to make a mold. For some complicated shapes such as arts and crafts, after transferring the female mold from the master model with silicon rubber,
Molten wax is poured into the female space to make a wax model. In addition, for some large arts and crafts, a method is also known in which a wax model is produced by dividing the wax model into several parts and the divided models are bonded together.

[0003]

The above-mentioned conventional precision casting method uses the mold or the silicon rubber mold for inversion or
Due to the adhesion of the wax, the reproducibility of the actual product was poor, and it was difficult to express the natural and delicate shape of the actual product, especially when producing cast products such as animals and plants. The present invention, by using a real animal or plant existing in the natural world, or the real thing of the organism existing in the natural world as a disappearance model, the shape of the natural product,
An object of the present invention is to provide a precision casting product that faithfully reproduces the skin and a manufacturing method thereof.

[0004]

Means for Solving the Problems The present inventor can apply a precision casting method in which a target animal or plant is directly used as a disappearance model as a method for directly expressing the appearance of an animal, a plant or the like in a cast product. They have found the present invention and reached the present invention. That is, the production method of the present invention is an animal,
It is characterized in that a plant or an organism existing in nature is used as a disappearance model, a refractory coating is applied to the disappearance model to form a refractory layer, and then casting is performed using a mold produced through a firing step. It is a method of manufacturing a precision cast product.

By this method, there can be obtained a precision cast product characterized by being cast as an extinction model of an animal, a plant or an organism existing in nature. Further, in the production method of the present invention, when the surface is soft and the shape is disturbed during coating of the refractory, it is effective to freeze and solidify. Also, when an animal or plant is used as a disappearance model, bones and carbonized pieces may remain after the firing step.In such a case, the inside of the mold produced after the firing step may be washed. desirable.

[0006]

The present invention uses the animal, plant or organism that exists in the natural world as a model (prototype) as it is by casting, and if it is a tree to make a mold, the pattern of the bark,
If it is a pine tree, folds etc. are reproduced faithfully. Also,
In particular, the change in cross-sectional area due to branching of trees is very suitable for the flowability of molten metal during casting, and it is possible to produce even the details of the branch tips, making it a tree that looks exactly like a genuine tree, and obtain an elaborate metal bonsai tree. Is possible.

In addition, when a flower, fish, octopus, etc., which is relatively difficult to maintain its shape as a model, is used as a model, the disappeared model is immersed in a cryogenic medium such as liquefied nitrogen for about 5 minutes as a pretreatment for mold making. However, by solidifying, it is possible to prevent a change in shape during mold production. In addition, in the present invention, it is also effective to boil or bake octopus such as octopus whose protein is solidified by heating. Further, trees and the like do not all diffuse as a gas in the firing step and may partially carbonize and remain, so it is preferable to add a step of washing the mold after obtaining the mold. Water for cleaning,
Various solvents that do not damage the mold can be used.

Such washing is also suitable when a fish or the like in which bones may remain is used as a disappearance model. Cast metal is excellent in castability and corrosion resistance, and austenitic stainless steel with little change over time is particularly suitable for arts and crafts such as figurines, but non-ferrous alloys such as aluminum alloys and copper alloys and carbon steel are also acceptable. It will be applied even if it is later plated. Further, according to the present invention, the shape of an animal, a plant, or an organism existing in the natural world is directly transferred to a cast product, so that the sample value is extremely high.

[0009]

【Example】

(Example 1) The root part of Satsuki bonsai was cut and removed,
After thoroughly washing with water, it was dried for 1 week. As shown in FIG. 1, a sprue cup 2 made of wax and a handle 3 were attached to the root portion of the cut bonsai 1 and then coated with a refractory slurry, and immediately sprinkled with refractory sand. After drying for 2 hours, this operation was repeated 7 times to form a mold having a thickness of 8 m / m. After the mold was dried in a thermostatic chamber for 24 hours, the handle 3 was removed, and the sprue cup 2 was placed in a baking furnace kept at 1000 ° C.
Was placed on the bottom and baked for 2 hours. By this firing, one part of the bonsai was carbonized, and most of the part fell off from the sprue part, but in order to completely clean the inside of the mold, it was once cooled to room temperature, and the inside of the mold was washed with water to remove carbonized pieces. Then, the mold was fired again at 1000 ° C., and austenitic stainless steel was cast. After casting, the mold was disassembled, and after the sprue was cut, the surface of the cast product was finished by blasting to produce a bonsai stainless integrally cast product. The product was able to faithfully reproduce the details of the bark and the tips of the branches.
Since this bonsai was made of stainless steel, it was excellent in corrosion resistance, had little deterioration, and was suitable as an ornament.

Example 2 After a wax sprue 6 was attached to a pine cone 5, as shown in FIG. 2, the wax sprue 4 was adhered to form a tree shape. From the glued tree,
A mold was molded in the same manner as in Example 1. The molded mold was fired in the same manner as in Example 1, washed with water, fired again, and then cast S15C carbon steel. After casting, mold separation was performed, the runner was cut, the surface of the casting was blasted, and then gold plating and silver plating were performed. The complicated shape of the pine tree
It can be faithfully reproduced as a metal product as it is in nature, and can be changed to gold or silver color by applying a graceful surface treatment, so it is ideal for metal figurines and high-quality ornaments that look like they are in nature. Is.

(Example 3) After a sprue is attached to a stem of a carnation flower, it is adhered to a wax runner to form a tree shape. This tree was immersed in liquefied nitrogen for 5 minutes to solidify, then quickly attached to a casting wax, and a mixture of gypsum and water prepared in advance was poured to solidify the gypsum. Then, the mixture was fired at 500 ° C. for 2 hours, processed at 700 ° C. for 8 hours to mold gypsum, then taken out at 200 ° C., and an aluminum alloy was cast under reduced pressure. By freezing with liquefied nitrogen before pouring gypsum, the petals can be cast without breaking, and since it was cast under reduced pressure, the molten metal spreads to the ends of the petals with a thickness of about 0.2 mm, which is true to the natural flower shape. I was able to obtain an elegant casting.

Example 4 After attaching a wax sprue to the head of a boiled octopus, it was adhered to a wax runner.
This tree was treated with liquefied nitrogen in the same manner as in Example 3, and then a template was formed and fired in the same manner as in Example 1. A copper alloy was cast using the obtained mold to obtain a cast product. This cast product faithfully reproduces the appearance of the octopus, and is ideal as an ornament for the octopus.

[0013]

As described above, the precision casting product according to the method of the present invention can faithfully reproduce the unique complex shape and skin of animals, plants or organisms existing in nature.
It has become possible to provide arts and crafts such as ornaments, ornaments, and specimens that have never existed before. When used in combination with a freezing process, it became possible to manufacture precision cast products with excellent reproducibility, even for objects whose shapes cannot be transferred as they are, such as flowers.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an example of an assembled shape of a model when a bonsai is used as a disappearing model.

FIG. 2 is a schematic view showing an example of an assembled shape of a model when the pine cone of Example 2 is used as a disappearance model.

[Explanation of symbols]

 1 Bonsai 2 Hot spring cup 3 Toride 4 Hot water path 5 Matsukasa 6 Hot spring

Claims (4)

[Claims] 1. A precision cast product, which is produced by casting an animal, a plant, or an organism existing in nature as a disappearance model. 2. An animal, a plant or an organism existing in nature is used as a disappearing model, and a refractory coating is applied to the disappearing model to form a refractory layer, which is then cast using a mold produced through a firing step. A method of manufacturing a precision casting product, the method comprising: 3. The method for producing a precision cast product according to claim 2, wherein the vanishing model is subjected to freezing treatment before the refractory coating treatment. 4. The method for producing a precision cast product according to claim 2, wherein the interior of the produced mold is washed after the firing step.