High-temperature-resistant coating for resin sand mold casting

Abstract

The invention discloses a high-temperature-resistant coating for resin sand mold casting. The high-temperature-resistant coating for resin sand mold casting is composed of the following raw materialsin parts by weight: 32-53 parts of water-soluble epoxy resin, 2-5 parts of polyester polyol, 7-10 parts of diethanol amine, 8-11 parts of methylbenzene, 0.3-1 part of polyacrylamide, 6-10 parts of sodium benzenesulfonate, 2-8 parts of aluminum oxide, 1-4 parts of nanometer titania, 3-7 parts of silica gel, 5-8 parts of baking soda, 12-19 parts of paraffin, 3-7 parts of kyanite powder, 1-5 parts ofcalcined potassium feldspar, 0.5-2 parts of fisetin, 3-10 parts of fish oil, 2-6 parts of kaolin and 26-47 parts of deionized water. The coating for resin sand mold casting is reasonable in formula components, excellent in bonding, easy to coat, resistant to high temperature, capable of preventing sand burn-on, sand inclusion and other defects during casting after cooling, and high in surface smoothness.

Description

technical field [0001] The invention relates to the technical field of casting coatings, in particular to a high-temperature-resistant coating for resin sand casting. Background technique [0002] At present, the traditional resin sand is used as a sand mold to block and isolate the casting and the mold to achieve the purpose of anti-sticking sand. During the casting process, due to reasons such as poor adhesion, low strength, poor fire resistance, and large gas generation, the resin used for solidification between the sand particles is burned and decomposed, the connection between the sand particles is destroyed, and the high-temperature molten metal will penetrate. Into the sand mold, resulting in sticky sand. At the same time, a large amount of gas is formed after burning and decomposing, leaving pores on the surface of the casting, which is easy to cause defects such as sand sticking, sand holes, pores, and carbon residues in the casting. However, the current resin san...

AI Technical Summary

Problems solved by technology

At the same time, a large amount of gas is formed after burning and decomposing, leaving pores on the surface of the casting, which is easy to cause defects such as sand sticking, sand holes, pores, carbon residue, etc.

However, the current resin sand coatings generally have low suspending properties, and they are often stirred during use, otherwise it is difficult to paint evenly. After painting, the coating is also easy to fall off during the drying process, resulting in sand sticking to castings and poor surface quality of castings.