Environment-friendly alcohol-based coating for sand mold casting

A kind of sand casting, environment-friendly technology, applied in casting molding equipment, coating, casting and other directions, can solve the problem of high bonding strength between casting surface and coating, affecting casting sand cleaning speed and production efficiency, and large sand cleaning workload, etc. problems, to achieve excellent dispersion and suspension effects, easy sand cleaning, and good anti-stick properties.

Active Publication Date: 2015-04-29
CHINA THREE GORGES UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The bonding strength between the casting surface and the coating is high, and the sand cleaning workload is heavy, which seriously affects the sand cleaning speed and production efficiency of the casting.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A method for preparing an environment-friendly alcohol-based paint for sand casting, the method comprising the steps of:

[0018] 1) Weighing ingredients: Take 80% of the above refractory aggregate (quartz powder 70%, aluminum oxide 20%, talcum powder 7%, calcium carbonate 3%, metal magnesium cross-linked acrylic resin 19%), thermoplastic phenolic resin 1 %, composite suspending agent 1.5% (lithium-based bentonite 65%, attapulgite 33%, CMC 1%, PVB 1%), defoamer 0.3%, the balance is carrier liquid, put it into the roller sand mixer and mix 40% minute;

[0019] 2) Take the above mixed slurry, add an appropriate amount of carrier liquid, and stir in a mixer for 20 minutes to form a uniformly dispersed coating, and adjust the Baume degree to 28-35.

Embodiment 2

[0021] A method for preparing an environment-friendly alcohol-based paint for sand casting, the method comprising the following steps

[0022] step:

[0023] 1) Weighing ingredients: Take 80% of the above-mentioned refractory aggregate (65% of quartz powder, 25% of aluminum oxide, 8% of talcum powder, 2% of calcium carbonate, 20% of metal magnesium cross-linked acrylic resin), thermoplastic phenolic resin 1.5 %, composite suspending agent 1.0% (lithium-based bentonite 65%, attapulgite 33%, CMC 0.8%, PVB 1.2%), defoamer 0.1%, the rest is carrier liquid, put into the roller type sand mixing Mix in the machine for 50 minutes;

[0024] 2) Take the above mixed slurry, add an appropriate amount of carrier liquid, and stir in a mixer for 20 minutes to form a uniformly dispersed coating, and adjust the Baume degree to 32-37.

Embodiment 3

[0026] A method for preparing an environment-friendly alcohol-based paint for sand casting, the method comprising the steps of:

[0027] 1) Weighing ingredients: Take 85% of the above-mentioned refractory aggregate (62% of quartz powder, 25% of aluminum oxide, 10% of talc powder, 3% of calcium carbonate, 10% of metal magnesium cross-linked acrylic resin), thermoplastic phenolic resin 1.0 %, composite suspending agent 1.3% (lithium-based bentonite 63%, attapulgite 35%, CMC 1%, PVB 1%), defoamer 0.05%, the balance is carrier liquid, put it into the roller sand mixer and mix 45% minute;

[0028] 2) Take the above mixed slurry, add an appropriate amount of carrier liquid, and stir in a mixer for 20 minutes to form a uniformly dispersed coating, and adjust the Baume degree to 34-40.

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Abstract

The invention discloses an environment-friendly alcohol-based coating for sand mold casting. The environment-friendly alcohol-based coating comprises refractory aggregate, a binding agent, a compound suspending agent and an auxiliary agent, wherein the refractory aggregate comprises 60 to 70 parts of quartz powder, 20 to 30 parts of aluminum sesquioxide, 5 to 10 parts of talcum powder, 1 to 5 parts of calcium carbonate, and 10 to 20 parts of magnesium metal crosslinking acrylic acid resin; the particle size range of the refractory aggregate is 150 to 320 meshes; the compound suspending agent comprises the following constituents: 40 to 65 parts of lithium base bentonite, 20 to 35 parts of attapulgite, 0.5 to 2 parts of CMC, and 0.5 to 2 parts of PVB; the binding agent adopts 1 to 2 parts of thermoplastic phenolic resin; a carrier liquid adopts ethyl alcohol or ethylene glycol; the auxiliary agent adopts 0.2 to 0.5 part of defoamer normal butanol. The alcohol-based coating used for sand mold casting, which takes quartz powder as the main refractory aggregate, is not added with graphite, is a low-cost casting coating with an environment-friendly advantage, is high in refractoriness, good in anti-adhesive sand property, is easily peeled from casting after casting, and is easy for sand removal of the casting.

Description

technical field [0001] The invention belongs to the technical field of sand casting, and in particular relates to an alcohol-based coating for sand casting, which is a kind of refractory aggregate with quartz powder, adding alumina, talcum powder, calcium carbonate powder, composite suspending agent, adhesive and auxiliary An environmentally friendly alcohol-based paint. Background technique [0002] The development of the foundry industry has higher and higher requirements on the surface quality of castings. In order to improve the surface quality of castings, a layer of casting paint is usually applied on the surface of the mold (core). The coating formed by the paint has high refractoriness, which can prevent sand sticking on the surface of castings and effectively improve the surface quality of castings. Therefore, the development of low-cost, high-quality casting coatings has positive significance for reducing the production cost of castings and improving the quality...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C3/00
CPCB22C3/00
Inventor 叶喜葱吴彬彬黄才华黄涛郑镇
Owner CHINA THREE GORGES UNIV
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