Anti-delamination special coated sand and preparation method thereof

A kind of coated sand, special technology, applied in the direction of manufacturing tools, casting equipment, metal processing equipment, etc., can solve the problems of generating a large number of nitrogen holes, easy to appear burrs, easy to form layers, etc., to reduce the tendency of volume reduction, reduce The effect of resin addition and production cost control

Active Publication Date: 2016-07-13
QINGLING MOTORS GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Coated sand is mainly used in the manufacture of hot core cores, which are used in the casting of mechanical parts. The performance of the coated sand depends on the composition of the coated sand and its preparation method. The existing cores are used for Wh

Method used

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  • Anti-delamination special coated sand and preparation method thereof
  • Anti-delamination special coated sand and preparation method thereof
  • Anti-delamination special coated sand and preparation method thereof

Examples

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Example Embodiment

[0024] Example 1

[0025] A kind of anti-stripping special coated sand, including the following raw materials: raw sand, phenolic resin, iron oxide, urotropine aqueous solution, calcium stearate, the raw sand is composed of reclaimed sand and precious pearl sand (this embodiment uses Baozhu sand was purchased from Luoyang Ruiyu Fine Ceramic Products Co., Ltd. The particle size of the Baozhu sand is selected according to the surface roughness of the product), the quality of the Baozhu sand accounts for 20% of the mass of the original sand, and the particle size of the Baozhu sand is 50 mesh. The particle size of sand is 50 mesh, the mass of phenolic resin is 2.5% of the mass of raw sand, the mass of iron oxide is 0.5% of the mass of raw sand, the mass of urotropine aqueous solution is 14% of the mass of phenolic resin, urotropine is The mass ratio of urotropine to water in the aqueous solution is 1:3.5, and the mass of calcium stearate is 7% of the mass of the phenolic resin.

[00...

Example Embodiment

[0033] Example 2

[0034] A kind of anti-stripping special coated sand, including the following raw materials: raw sand, phenolic resin, iron oxide, urotropine aqueous solution, calcium stearate, the raw sand is composed of reclaimed sand and precious pearl sand (this embodiment uses Baozhu sand was purchased from Luoyang Ruiyu Fine Ceramic Products Co., Ltd., and the particle size of the Baozhu sand is selected according to the surface roughness of the product). The quality of the Baozhu sand accounts for 21% of the mass ratio of the original sand. The particle size of the Baozhu sand is 60 mesh. The particle size of sand is 60 mesh, the mass of phenolic resin is 2.6% of the mass of raw sand, the mass of iron oxide is 0.5% of the mass of raw sand, the mass of urotropine aqueous solution is 15% of the mass of phenolic resin, urotropine The mass ratio of urotropine to water in the aqueous solution is 1:3.5, and the mass of calcium stearate is 7% of the mass of the phenolic resin. ...

Example Embodiment

[0042] Example 3

[0043] A kind of anti-stripping special coated sand, including the following raw materials: raw sand, phenolic resin, iron oxide, urotropine aqueous solution, calcium stearate, the raw sand is composed of reclaimed sand and precious pearl sand (this embodiment uses Baozhu sand was purchased from Luoyang Ruiyu Fine Ceramic Products Co., Ltd. The particle size of the Baozhu sand is selected according to the surface roughness of the product. The quality of the Baozhu sand accounts for 22% of the mass ratio of the original sand, and the particle size of the Baozhu sand is 75 mesh. The particle size of the sand is 65 mesh, the mass of phenolic resin is 2.6% of the mass of raw sand, the mass of iron oxide is 0.7% of the mass of raw sand, the mass of urotropine aqueous solution is 15% of the mass of phenolic resin, urotropine The mass ratio of urotropine to water in the aqueous solution is 1:4, and the mass of calcium stearate is 7.5% of the mass of phenolic resin.

[...

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Abstract

The invention provides anti-delamination special coated sand and a preparation method thereof.The special coated sand is prepared from crude sand, phenolic resin, iron oxide, a methenamine aqueous solution and calcium stearate, the crude sand is composed of reclaimed sand and nice foundry sand, the mass of phenolic resin is 2.5%-2.7% of that of the crude sand, the mass of iron oxide is 0.5%-0.7% of that of the crude sand, the mass of the methenamine aqueous solution is 14%-17% of that of phenolic resin, and the mass of calcium stearate is 7%-8% of that of phenolic resin.According to the anti-delamination special coated sand and the preparation method thereof, formula ingredients and proportions of original coated sand are broken, an appropriate amount of nice foundry sand with good liquidity and heat transmitting is added, the addition amount of resin is reduced, an appropriate amount of iron oxide powder is added, the occurrence rate of nitrogen holes is obviously decreased, and the problems that a prepared water jacket core of existing coated sand is prone to delamination and deformation, and the nitrogen holes, flash and burrs of a casting of the water jacket core are prone to be caused are effectively solved.

Description

technical field [0001] The invention relates to the technical field of casting, in particular to a special coated sand for anti-layering and a preparation method thereof. Background technique [0002] Coated sand is mainly used in the manufacture of hot core cores, which are used in the casting of mechanical parts. The performance of the coated sand depends on the composition of the coated sand and its preparation method. The existing cores are used for When the engine is cast, the surface of the core is loose and easy to peel off. The qualified rate of the casted engine is low, and it is prone to burrs, even deformation, and produces a large number of nitrogen pores, which seriously affects the quality of the casting. Contents of the invention [0003] In view of the above-mentioned shortcoming of the prior art, the purpose of the present invention is to provide a kind of special coated sand and preparation method thereof that prevents layering, for solving the problem th...

Claims

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Application Information

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IPC IPC(8): B22C1/02B22C1/10B22C9/10
CPCB22C1/02B22C1/10B22C9/10
Inventor 王维潘先伦沈联庆曲昌军刘忠卫李小东
Owner QINGLING MOTORS GRP
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