Simple alcohol-based casting coating and preparation method thereof

Abstract

The invention discloses a simple alcohol-based casting coating and a preparation method thereof and belongs to the field of casting coatings. The coating comprises the following components in parts by weight: 65-75 parts of zircon power, 1.5-4 parts of lithium-based bentonite, 1-2.5 parts of clay, 0.8-3.5 parts of resin, 5-10 parts of silica sol, 0.1-0.3 part of polyvinyl butyral and 45-55 parts of industrial alcohol. The coating preparation method sequentially comprises the following steps of: 1, weighing and grinding the zircon power, adding and grinding lithium-based bentonite, adding and grinding clay and silica sol, adding and grinding resin, wherein the powder is uniformly ground; and adding an additive polyvinyl butyral into the powder, and fully grinding to prepare dry powder; and 2, slowly adding alcohol into the dry powder, stirring to a proper concentration, and preparation the coating. The defects in the prior art are overcome, the coating has good effects on aspects of suspension, brushing property, high-temperature cracking resistance and burnt-on sand resistance, and the produced casting piece is excellent in surface quality; and moreover, the coating is simple and rapid in process, short in production cycle, high in production efficiency, low in cost and good in market prospect.

Description

technical field [0001] The invention relates to the technical field of alcohol-based casting coatings. Background technique [0002] A casting coating is a thin layer of refractory coating applied to the surface of a casting mold (core). It is of great significance to improve the quality of the working surface of the mold (core) and obtain castings with excellent surface quality. If the casting coating is applied properly, it should be able to play the following roles in casting work: prevent physical and chemical sand sticking; reduce the surface roughness value of castings; strengthen the surface of the sand mold to reduce sand washing during casting; protect the metal mold And control the solidification process of castings; strengthen the interaction between metal-coating-mold (core), improve the surface performance and internal quality of castings. [0003] However, at present, there is still a large gap between my country's domestic casting coating products and foreig...

AI Technical Summary

Problems solved by technology

[0004]1. Poor suspension stability of paint

[0005]2. Low production efficiency

In the process of preparing the coating, it takes up to 3-4 hours to initiate the suspension agent, the production cycle is long, the operation is troublesome, the labor intensity is high, and the production cost is also high

[0006]3. Affecting workers' health and the environment

And the time required for the production process of this manufacturing method is long, such as activating lithium-based bentonite needs more than 24 hours, making nano-scale thickener pre-gel needs more than 24 hours, making modified aluminum magnesium silicate pre-gel needs more than 24 hours, and made The 10% polyvinyl butyral solution needs to stand for more than 48 hours, so the production efficiency is low and the production cost is virtually increased

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