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Gypsum cast material for melt mould casting

A technology of investment casting and casting mold, which is applied in casting molding equipment, casting molds, casting mold components, etc., and can solve the problem of South Korea's inability to produce gypsum casting materials.

Inactive Publication Date: 2008-10-22
SANYU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, since South Korea cannot produce plaster casting materials for investment casting, all materials are imported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A mold was prepared by mixing 30 wt% of 10 μm cristobalite, 50 wt% of 30 μm cristobalite (CS200, produced by Korea Semiconductor), 19 wt% of 100 μm α-gypsum, 0.5 wt% of time regulator and 0.5 wt% of paint enhancer Material.

Embodiment 2

[0023] A casting material was prepared by mixing 35 wt % 10 μm cristobalite, 45 wt % 30 μm cristobalite, 19 wt % 100 μm alpha gypsum, 0.5 wt % time modifier and 0.5 wt % paint enhancer.

Embodiment 3

[0025] A casting material was prepared by mixing 40 wt % 10 μm cristobalite, 40 wt % 30 μm cristobalite, 19 wt % 100 μm alpha gypsum, 0.5 wt % time regulator and 0.5 wt % paint enhancer.

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PUM

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Abstract

The invention discloses a gypsum mould material for casting a precision fusible pattern, characterized in that the gypsum mould material is prepared by respectively mixing 30 to 50% by weight of 10 mum cristobalite, 35 to 60% by weight of 30 mum cristobalite, 15 to 25% by weight of alpha gypsum, 1 to 5% by weight of time regulator and a coating intensifier. By using noble metals such as gold, silver and platinum, the invention can be used for preparation of the precision casting. The mould procedure can be carried out even at high temperature when injecting the molten metal, no crack will be generated and excellent dispersivity is obtained.

Description

technical field [0001] The present invention relates to a plaster mold material for investment casting, and in particular a plaster mold material for investment casting in which precision castings can be produced using precious metals such as gold, silver, platinum, and the like. Even if the molding process is performed at a high temperature when injecting molten metal, no cracks are generated and good dispersion is obtained. Background technique [0002] The investment casting process is usually divided into replica casting, leadcasting and lost wax casting. Lost wax casting, or lost foam casting, is also known as investment casting. This casting process has been used by dentists and precious metal workers since the times of ancient Egypt and ancient China, and it has actually become part of the industry after World War II. In the aerospace industry, investment casting uses metals with high melting points to create precision and complex shapes that are not easy to handle,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/00B22C3/00
CPCB22C1/04B22C1/08B22C1/18
Inventor 朴昭炫
Owner SANYU CO LTD
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