Special coating for full mold casting
A solid casting and coating technology, applied in casting molding equipment, coating, casting and other directions, can solve the problems of poor adhesion, too thin coating, poor air permeability, etc., to achieve strong coating and thixotropy, The effect of increasing dimensional accuracy and reducing production costs
Inactive Publication Date: 2009-06-03
大连核心铸造技术工程研究所
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Problems solved by technology
The patent application number is 01142612.8 "Absorptive Aluminum Alloy Lost Foam Casting Coating and Its Preparation Method" disclosed in the invention patent specification, which provides that the chemical components of the coating are diatomite, pearl powder, mica powder, silica gel liquid, white latex, polypropylene Special coatings for lost foam casting made of acyl carboxyl, sodium carboxymethyl cellulose and adsorbents all have shortcomings such as too thin coating, poor adhesion, and poor air permeability.
Method used
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Effect test
Embodiment 1
[0009] Embodiment 1, a special coating for full mold casting is characterized in that the coating is composed of sodium borate, phosphoric acid, silica sol, ethyl acetate, polyacryloyl carboxyl, sodium carboxymethyl cellulose and adsorbent, according to the weight ratio 10:2~3:6~9:8~10:8~10:2~6:5~8 mixed and stirred.
[0010] Embodiment 1: the optimum weight ratio of each component in the above-mentioned special coating for full mold casting is: sodium borate: phosphoric acid: silica sol: ethyl acetate: polyacryloyl carboxyl: L sodium carboxymethyl cellulose: adsorbent 10:3 :9:8:10:5:5.
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A special coating for full mold casting is characterized in that the coating is prepared by mixing and stirring components consisting of sodium borate, phosphoric acid, silica sol, ethyl acetate, polypropylene acyl carboxy, carboxymethyl cellulose sodium and absorbent according to the weight ratio of 10:2-3:6-9:8-10:8-10:2-6:5-8. The special coating for full mold casting has the advantages that the coating property and thixotropy are quite strong, and the casting can effectively absorb liquid products produced by foam plastic model pyrolysis during the using process, thus reducing the porosity of a casting part below 0.2 percent, greatly improving the precision of the size of the casting part, and reducing the finishing allowance of blanks of the casting part.
Description
technical field [0001] The invention relates to a special coating for full mold casting, which belongs to the technical field of material modification chemical materials. Background technique [0002] In the full mold casting industry, full mold surface coating is one of the key technologies of full mold casting. In the prior art, the porosity of the full-shape cast aluminum parts is a major problem in the promotion of the full-shape casting. In order to reduce the porosity of aluminum castings, the performance of aluminum alloy lost foam coating is very important. The patent application number is 01142612.8 "Absorptive Aluminum Alloy Lost Foam Casting Coating and Its Preparation Method" disclosed in the invention patent specification, which provides that the chemical components of the coating are diatomite, pearl powder, mica powder, silica gel liquid, white latex, polypropylene The special coatings for lost foam casting made of acyl carboxyl, sodium carboxymethyl cellulo...
Claims
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Inventor 刘弘
Owner 大连核心铸造技术工程研究所
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