High-strength and easy-to-clean silica sol shell making process

A silica sol, high-strength technology, used in manufacturing tools, metal processing equipment, casting and molding equipment, etc., can solve the problems of rough surface of castings affecting surface quality, affecting enterprise production efficiency, product quality, and difficulty in cleaning sand in shell-making processes. To achieve good molding and coating effect, reduce the number of sizing layers, and improve the effect of anti-cracking effect
CN112808935AActive Publication Date: 2021-05-18JIANGYIN UNI POL
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGYIN UNI POL
Publication Date
2021-05-18

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Abstract

The invention discloses a high-strength and easy-to-clean silica sol shell making process which specifically comprises the following steps of coating the surface of a wax mold with surface layer slurry, spraying zircon sand, drying at 40-60 DEG C for 3-6 hours, coating with back layer slurry, and finally sealing the slurry. The surface of a casting manufactured through the shell making process is smoother and has no cracks, burrs or bumps, various mechanical properties of the casting are superior to those of a casting prepared through an existing method, and the compactness and hardness are higher.
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Description

technical field

[0001] The invention relates to the technical field of precision investment casting, in particular to a high-strength, easy-to-clean silica sol shell-making process. Background technique

[0002] The investment casting process refers to making a model with wax, wrapping multiple layers of clay, binder and other materials on its surface, heating the wax to melt and flow out, so as to obtain a shell, and then pouring the metal into the shell after melting. After cooling, the shell is crushed to obtain metal parts. This process of processing metal is called investment casting, also known as investment casting or lost wax casting.

[0003] Difficulty in sand cleaning in the shell making process of the investment casting industry is a common problem. Repeated shot blasting and air grinding lead to rough casting surface and affect the surface quality. It is unsafe, not environmentally friendly, and the cost is high. This problem has always been a difficult problem ...

Claims

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