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High-suspension sand mold coating and preparation method thereof

A sand coating and high-suspension technology, which is applied to casting molding equipment, coatings, casting molds, etc., can solve problems such as easy sedimentation, inconvenient operation, and unsatisfactory suspending agent or binder effect, so as to reduce sand sticking and improve Bonding effect, effect of improving suspension effect

Inactive Publication Date: 2014-03-26
FUZHOU WENTAI MACHINERY CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, sand mold coatings on the market often use bentonite, sodium carboxymethyl cellulose, etc. as suspending agents, but because bentonite has not been activated, its effect as a suspending agent or binder is not ideal, so it is currently in the national foundry coatings market. The sand mold paint sold is easy to settle, and needs to be stirred every time it is used, resulting in inconvenient operation, and it is difficult to apply the sand mold paint to the surface of the sand mold by flow coating, spraying, brushing and other processes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0054] The preparation method of high-suspension sand coating of the present invention, described preparation method comprises the following steps:

[0055] 1) Mix water and sodium carboxymethyl cellulose, and stir at room temperature for 20-28 hours until the sodium carboxymethyl cellulose is completely dissolved;

[0056] 2) Add bentonite and soda to the solution in step 1), stir for 24 hours, add alkylphenol polyoxyethylene ether and Tween 80, stir well, then add phosphorus flake graphite powder and amorphous graphite powder, and stir the solution again The high-suspension sand coating is uniformly obtained.

Embodiment 1

[0058] A kind of preparation method of high-suspension sand mold coating comprises the following steps:

[0059] 1) First weigh each component according to the following parts by weight:

[0060] 100 parts of water;

[0061] Phosphorus flake graphite powder 35 parts;

[0062] 65 parts of amorphous graphite powder;

[0063] 0.4 parts of sodium carboxymethylcellulose;

[0064] 4.5 parts of bentonite;

[0065] Soda 0.36 parts;

[0066] 0.3 part of alkylphenol polyoxyethylene ether;

[0067] Tween 80 0.05 parts.

[0068] 2) Mix water and sodium carboxymethyl cellulose, and stir at room temperature for 24 hours, the sodium carboxymethyl cellulose is completely dissolved;

[0069] 3) Add bentonite and soda to the solution in step 1), stir for 24 hours, add alkylphenol polyoxyethylene ether and Tween 80, stir well, then add phosphorus flake graphite powder and amorphous graphite powder, and stir the solution again The high-suspension sand coating is uniformly obtained.

Embodiment 2

[0071] A kind of preparation method of high-suspension sand mold coating comprises the following steps:

[0072] 1) First weigh each component according to the following parts by weight:

[0073] 100 parts of water;

[0074] Phosphorus flake graphite powder 20 parts;

[0075] 80 parts of amorphous graphite powder;

[0076] 0.3 parts of sodium carboxymethylcellulose;

[0077] 5.5 parts of bentonite;

[0078] Soda 0.36 parts;

[0079] 0.3 part of alkylphenol polyoxyethylene ether;

[0080] Tween 80 0.05 parts;

[0081] 2) Mix water and sodium carboxymethyl cellulose, and stir at room temperature for 20 hours, the sodium carboxymethyl cellulose is completely dissolved;

[0082] 3) Add bentonite and soda to the solution in step 1), stir for 24 hours, add alkylphenol polyoxyethylene ether and Tween 80, stir well, then add phosphorus flake graphite powder and amorphous graphite powder, and stir the solution again The high-suspension sand coating is uniformly obtained.

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Abstract

The invention discloses a high-suspension sand mold coating which comprises the following components in parts by weight: 100 parts of water, 20-40 parts of crystalline graphite powder, 60-80 parts of amorphous graphite powder, 0.3-0.6 part of sodium carboxymethyl cellulose, 4-5.5 parts of bentonite, 0.36 part of soda, 0 .3 part of alkylphenol ethoxylates and 0.05 part of Tween 80. According to the sand mold coating, all components are uniformly mixed, and can be uniformly suspended in a solution without generating sediment for 12 months; the infiltration effect is good, so that processes such as flow coating, spray coating and brush coating can be adopted to coat the sand mold coating on the surface of a sand mold. The sand mold coating is simple to prepare and low in cost, can improve the sand mold strength when coated on the surface of the sand mold, and has greatly improved corrosion resistance, high-temperature resistance, and fire resistance.

Description

technical field [0001] The invention relates to a sand mold coating, in particular to a high-suspension sand mold coating and a preparation method thereof. Background technique [0002] Foundry coatings include foundry mold coatings, sand mold coatings and new alcohol-based coatings. Among them, the sand mold coating is mainly the same as coating on the surface of the sand mold, and has the following functions: 1) It can improve the surface quality of the casting. 2) Improve the refractoriness of sand molds, avoid or reduce sand sticking. 3) Reduce sand loss caused by handling and box buckling. 4) It is convenient for sand cleaning of castings. [0003] At present, sand mold coatings on the market often use bentonite, sodium carboxymethyl cellulose, etc. as suspending agents, but because bentonite has not been activated, its effect as a suspending agent or binder is not ideal, so it is currently in the national foundry coatings market. The sand mold coatings sold are eas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C3/00
Inventor 黄文泰王明杰
Owner FUZHOU WENTAI MACHINERY CASTING
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