Alcohol zircon flour coating for heavy castings and its production method

Abstract

The invention relates to a paint used in large casting element and relative production, wherein said paint is alcohol-base zircon powder casting paint, which contains zircon at 62-75%, lithium-base at alta-mud 1-3%, deionized water at 1-3%, modified almasilate at 1-3%, nanometer clay at 0.15-0.8%, alumind at 0.020-0.08%, soluble polyester resin at 0.2-1.2%, polyvinyl butyral (PVB) at 0.1-0.8%, abietyl at 0.6-3%, industrial alcohol at 15-25%, alcohol isopropylicum at 1-5%, and aromatic solvent oil at 150#1-5%. The inventive product has high fire resistance, etc.

Description

technical field [0001] The invention relates to a casting coating, in particular to an alcohol-based zircon powder coating for large castings and a manufacturing method thereof. Background technique [0002] As the basic industry of the country, the heavy equipment manufacturing industry plays a vital role in the national economy. As the core components of national defense, metallurgy, petroleum, chemical industry, power station, nuclear energy and other industries, the quality of large castings is one of the important factors that directly affect the development of these industries. With the continuous development of these industries, the quality of large castings will The level puts forward higher and higher requirements. Applying casting paint on the working surface of the mold (core) is an important process in the production process of large castings. The main functions of the casting paint include: reducing the surface roughness of the casting; preventing and reducing ...

AI Technical Summary

Problems solved by technology

During construction, it is necessary to add more organic solvents to adjust the paint to a lower viscosity before it can be brushed open, so the thickness of the coating obtained by each brushing is thin, and a large amount of solvents corrode the sand mold, causing harm

[0006] 3. Poor brushing property

The hand feels not smooth when brushing, and the brush feels astringent and tight every time it is dipped in the paint and brushed back and forth several times, which makes the brushing operation time-consuming and laborious, increases the labor intensity of brushing, reduces the brushing efficiency, and cannot meet the requirements of large-scale casting sand molds / Core requirements for large area brushing

[0007] 4. Poor leveling

Due to the poor leveling of the coating, the coating cannot automatically level the brush marks produced by brushing, resulting in obvious brush marks left after the coating is ignited and dried, making the surface of the cast casting rough, which is not conducive to improving the surface quality of the casting

[0008] Although, a kind of name is disclosed in Chinese patent and is called " lithium-based bentonite zircon powder powdery casting coating " (application number: 86105456), also discloses a kind of name called " alcohol-based or water-based sand powder anti-penetration sticky sand "Casting coating" (application number: 200510018167), but its quality and technical indicators still have a certain gap compared with imported products, such as poor suspension, easy sinking and hardening, difficult painting, poor leveling, not suitable for large castings Application in production