Disappeared mould and water-based paint composite powder additive used for sand casting

Abstract

A composite powdered additive for the water-base paint used for investment mould and casting sand mould is prepared from filix root starch, carboxymethyl cellulose sodium, Ca-based benton, sodium carbonate, magnesium sulfate, sodium chloride, and medical disinfecting powder through proportional mixing and pulverizing.

Description

Technical field: [0001] The invention relates to casting paint additives, in particular to lost foam and sand casting water-based paint composite powder additives. Background technique: [0002] At present, the preparation process of water-based coatings in the foundry industry at home and abroad is quite cumbersome: refractory powder + binder + wetting agent + defoamer + preservatives such as formaldehyde solution + water → after mixing and stirring for 24 hours → re-stirring or It can be used after rolling for more than 5 hours, and the price is about 20,000 yuan per ton. Almost all commercial water-based coatings in the foundry industry at home and abroad use highly toxic materials such as phenol or formaldehyde as preservatives, which are extremely harmful to humans and the environment. Large; domestic and foreign advanced casting water-based coating slurry has a suspension of about 95%, and it will settle for 8 hours, and it will ferment for a few days to produce air bu...

AI Technical Summary

Problems solved by technology

[0002] At present, the preparation process of water-based coatings in the foundry industry at home and abroad is quite cumbersome: refractory powder + binder + wetting agent + defoamer + preservatives such as formaldehyde solution + water → after mixing and stirring for 24 hours → re-stirring or It can be used after rolling for more than 5 hours, and the price is about 20,000 yuan per ton. Almost all commercial water-based coatings in the foundry industry at home and abroad use highly toxic materials such as phenol or formaldehyde as preservatives, which are extremely harmful to humans and the environment. Large; the suspension of domestic and foreign advanced casting water-based coating slurry is about 95%, it will settle after 8 hours, and it will ferment and produce bubbles in a few days, so it cannot be used

In addition, there is no one-time sand mixing operation in place in the international foundry industry, that is, there is no need to add any other materials except refractory base material and carrier water, and there is no water-based coating powder composite additive suitable for all refractory base materials. It is a powdery composite additive suitable for castings of all corresponding materials, both for all sand molds and for lost foam casting

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