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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

Active Publication Date: 2021-05-18
JIANGYIN UNI POL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[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 in the precision casting industry. , which directly affects the production efficiency and product quality of the enterprise

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] High-strength, easy-to-clean silica sol shell manufacturing process is as follows:

[0036] After coating the surface of the wax model with the surface layer slurry, pour zircon sand with a mesh number of 30-60, dry at 55°C for 5 hours, then coat with the back layer slurry, and finally seal the slurry;

[0037] The surface layer slurry is made up of the following raw materials in parts by weight:

[0038] 15 parts of nano-zirconium sol, 40 parts of zirconium powder, 0.5 parts of polyoxyethylene ether, 0.15 parts of trihydrogen phosphate, 0.15 parts of polyether modified silicone oil, 0.02 parts of HX-006 anti-cracking agent, 0.016 parts of HX-007 inoculant, 35 parts of distilled water;

[0039] Wherein, the preparation method of nano zirconium sol is as follows:

[0040] Under stirring, slowly add basic cobalt carbonate to glacial acetic acid, after 8 minutes of insulated stirring at 40°C, add ethanol and continue stirring for 1 hour, then add triethanolamine to adjus...

Embodiment 2

[0050] High-strength, easy-to-clean silica sol shell manufacturing process is as follows:

[0051] After coating the surface of the wax model with the surface layer of slurry, pour zircon sand with a mesh number of 30-60, dry at 50°C for 5 hours, then coat with the back layer of slurry, and finally seal the slurry;

[0052] The surface layer slurry is made up of the following raw materials in parts by weight:

[0053]14 parts of nano zirconium sol, 40 parts of zirconium powder, 0.3 parts of polyoxyethylene ether, 0.1 part of trihydrogen phosphate, 0.4 parts of polyether modified silicone oil, 0.02 parts of HX-006 anti-cracking agent, 0.015 parts of HX-007 inoculant, 35 parts of distilled water;

[0054] Wherein, the preparation method of nano zirconium sol is as follows:

[0055] Under stirring, slowly add basic cobalt carbonate to glacial acetic acid, keep stirring at 40°C for 10 minutes, add ethanol and continue stirring for 1.5 hours, then add triethanolamine to adjust th...

Embodiment 3

[0065] High-strength, easy-to-clean silica sol shell manufacturing process is as follows:

[0066] After coating the surface of the wax model with the surface layer of slurry, pour zircon sand with a mesh number of 30-60, dry at 40°C for 3 hours, then coat with the back layer of slurry, and finally seal the slurry;

[0067] The surface layer slurry is made up of the following raw materials in parts by weight:

[0068] 13 parts of nano-zirconium sol, 30 parts of zirconium powder, 0.1 part of polyoxyethylene ether, 0.1 part of trihydrogen phosphate, 0.1 part of polyether modified silicone oil, 0.015 parts of HX-006 anti-cracking agent, 0.015 parts of HX-007 inoculant, 30 parts of distilled water;

[0069] Wherein, the preparation method of nano zirconium sol is as follows:

[0070] Under stirring, slowly add cobalt basic carbonate to glacial acetic acid, keep stirring at 35°C for 5 minutes, add ethanol and continue to stir for 1 hour, and then add triethanolamine to adjust the...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/04B22C3/00B22C1/02
CPCB22C9/04B22C3/00B22C1/02
Inventor 万富红
Owner JIANGYIN UNI POL
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