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Temperature-resisting type self-repairing coating used for casting mold

A casting mold and self-repairing technology, which is applied in the direction of casting molding equipment, casting molds, casting mold components, etc., can solve the problems of difficulty in ensuring the quality of castings, the reduction of other performances, and the increase of casting costs, etc., to achieve a small thermal expansion coefficient and improve temperature resistance Good wear resistance and fatigue resistance

Inactive Publication Date: 2018-09-21
SUZHOU HAOYAN PRECISION MOLD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, with the rapid development of high-tech, more and more types of raw materials are used in casting, so the temperature resistance requirements for casting mold coatings are also getting higher and higher, and the existing mold coatings are improving the temperature resistance At the same time, other properties have a certain reduction, it is difficult to guarantee the quality of castings
At the same time, for high-end castings, casting mold coatings are also developing in the direction of high cost and high quality; after a complete casting, casting mold coatings need to be repainted, resulting in an increase in casting costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A temperature-resistant self-repairing coating for casting moulds. Its components and the mass percentages of each component are: carrier resin: 52%, admixture: 22%, polyvinyl alcohol: 13%, additives: 13%; the composition of the carrier resin and the percentages of each component in the total mass of the carrier resin are: linseed oil water-soluble alkyd resin: 33%, polyesterimide resin: 45%, silicone resin: 22%; blending The composition of the material and the percentage of each component in the total mass of the blended powder are: composite fiber powder: 40%, ceramic powder: 52%, silica airgel: 8%, and the particle size of the blended material is 28 μm, Composite fiber powder is made by mixing silicate fiber powder and carbon fiber powder according to the mass ratio of 3:1; the components of the additives and the percentages of each component in the total mass of the additives are: acidic aqueous solution of ethyl orthosilicate: 20 %, repair solution: 33%, activation...

Embodiment 2

[0018] A temperature-resistant self-repairing coating for casting moulds. Its components and the mass percentages of each component are: carrier resin: 70%, admixture: 17%, polyvinyl alcohol: 7%, additives: 6%; the composition of the carrier resin and the percentages of each component in the total mass of the carrier resin are: linseed oil water-soluble alkyd resin: 45%, polyesterimide resin: 37%, silicone resin: 18%; blending The composition of the material and the percentage of each component in the total mass of the blended powder are: composite fiber powder: 55%, ceramic powder: 40%, silica airgel: 5%, and the particle size of the blend is 20 μm, Composite fiber powder is made by mixing silicate fiber powder and carbon fiber powder at a mass ratio of 7:1; the components of the additives and the percentages of each component in the total mass of the additives are: acidic aqueous solution of ethyl orthosilicate: 33 %, repair solution: 25%, activation solution: 25%, nucleatin...

Embodiment 3

[0020] A temperature-resistant self-repairing coating for casting moulds. Its components and the mass percentages of each component are: carrier resin: 60%, admixture: 19%, polyvinyl alcohol: 11%, additives: 10%; the composition of the carrier resin and the percentages of each component accounting for the total mass of the carrier resin are: linseed oil water-soluble alkyd resin: 39%, polyesterimide resin: 40%, silicone resin: 21%; blending The composition of the material and the percentage of each component in the total mass of the blended powder are: composite fiber powder: 47%, ceramic powder: 46%, silica airgel: 7%, and the particle size of the blend is 25 μm, Composite fiber powder is made by mixing silicate fiber powder and carbon fiber powder at a mass ratio of 5:1; the components of the additives and the percentages of each component in the total mass of the additives are: acidic aqueous solution of ethyl orthosilicate: 26 %, repair solution: 29%, activation solution: ...

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Abstract

The invention provides a temperature-resisting type self-repairing coating used for a casting mold. The coating comprises carrier resin, blending stock, polyvinyl alcohol and an assistant; the carrierresin comprises linseed oil water soluble alkyd resin, polyester imide resin and organic silicon resin; the blending stock comprises composite fiber powder, ceramic powder and silicon dioxide silicaaerogel; the assistant comprises a tetraethoxysilane acid aqueous solution, repair liquid, an activation solution and a nucleating agent; the coating has the excellent temperature resistance and wearresistance, during use, a flat, continuous and smooth coating thin film is formed on the mold surface, meanwhile, the coating thin film has a certain restoration function, use of the coating is reduced, and the casting cost is reduced; and components are simple and easily obtained, the cost is moderate, the coating is suitable for being used and popularized in small and medium enterprises, and thewide market prospects are achieved.

Description

technical field [0001] The invention belongs to the technical field of casting, and in particular relates to a temperature-resistant self-repairing coating for casting moulds. Background technique [0002] Foundry mold coating is used to isolate the casting and the mold to achieve the purpose of anti-sticking sand. In recent years, with the rapid development of high-tech, more and more types of raw materials are used in casting, so the temperature resistance requirements for casting mold coatings are also getting higher and higher, and the existing mold coatings are improving the temperature resistance At the same time, other properties are reduced to a certain extent, and it is difficult to guarantee the quality of castings. At the same time, for high-end castings, casting mold coatings are also developing in the direction of high cost and high quality; after a complete casting, casting mold coatings need to be repainted, resulting in an increase in casting costs. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C3/00
CPCB22C3/00
Inventor 刘浩张君
Owner SUZHOU HAOYAN PRECISION MOLD CO LTD
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