Environment-friendly casting molding sand and preparation method thereof
A casting mold and environmental protection technology, which is applied in the direction of casting molding equipment, casting molds, mold cores, etc., can solve the problems of rough surface of aluminum sand parts, poor air permeability of sand molds, toxic gas pollution, etc., and achieve good bonding effect and no collapse Good performance, the effect of solving shrinkage cavity
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[0011] An environmentally friendly foundry sand made from the following raw materials in parts by weight (kg): quartz sand 220, sodium bentonite 55, red clay 25, talcum powder 35, zinc oxide 25, traditional Chinese medicine slag 22, straw powder 43, carboxymethyl fiber Vegetable 2.5, Brown Sugar 7, Fatty Alcohol Polyoxyethylene Ether 1.6, Brick Slag Powder 44, Boric Acid 2.5, Perlite 43, Polyvinyl Alcohol 2.5, Tung Oil 1.5, Bamboo Charcoal 33, Appropriate amount of water.
[0012] The preparation method of the environment-friendly foundry sand is characterized in that it comprises the following steps: putting sodium bentonite, red clay, brick slag powder, and perlite in a calcination furnace at 560°C for 3.6 hours, and then taking them out and crushing them into 250-mesh powder, Then add traditional Chinese medicine residue, straw powder, appropriate amount of water, stir and disperse, knead the mud, send it to a calcination furnace at 1430°C for 4 hours, take it out and pulver...
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