Furan resin laminating core sand for train component casting and preparing method of furan resin laminating core sand

Abstract

The invention discloses a furan resin laminating core sand for train component casting and a preparing method of the furan resin laminating core sand. The furan resin laminating core sand is prepared from, by weight, 140-160 parts of fused magnesite, 30-40 parts of chromite sand, 20-30 parts of ceramsite sand, 14-16 parts of glass pumice, 3-5 parts of furan resin, 0.5-0.7 part of molecular distillation monoglyceride, 2-4 parts of aluminophosphite, 3-5 parts of calcium stearate, 8-10 parts of spherical quartz powder, 3-5 parts of nanometer tungsten oxide, 5-7 parts of silicon boride and the like. According to the furan resin laminating core sand, the furan resin, the aluminophosphite, tri (4-hydroxyphenyl) methane glycidyl ether and triethylene tetramine are added for providing good caking property and solidification effect for the core sand, a resin curing agent prepared from toluenesulfonic acid and methyl sulfate is used for shortening resin hardening time, the concentration of formaldehyde in air in an operation area is reduced, and the health of workers is facilitated; under the joint effect of a furan resin binder and the curing agent, the strength of the self-hardening sand is improved; and in addition, as the addition of lubricating agents including the calcium stearate and the molecular distillation monoglyceride, the breathability of the core sand is improved, and the gas-forming amount is reduced.

Description

[0001] field of invention [0002] The invention belongs to the field of foundry industry, and in particular relates to a furan resin-coated core sand for casting train components and a preparation method thereof. Background technique [0003] Coated sand is a molding sand or core sand that is covered with a solid resin film on the surface of the sand grains before molding. There are two coating processes: cold method and hot method: the cold method dissolves the resin with ethanol, and adds molecular distillation monoglyceride during the sand mixing process, so that the two are coated on the surface of the sand grains, and the ethanol volatilizes to obtain coated sand; The thermal method preheats the sand to a certain temperature, adds resin to make it melt, stirs to coat the resin on the surface of the sand, adds molecularly distilled monoglyceride aqueous solution and lubricant, cools, crushes, and sieves to obtain coated sand, which is used for casting Steel parts, cast i...

AI Technical Summary

Problems solved by technology

At the high temperature of casting casting, part of the active N and H atoms are absorbed by the molten metal, and most of the remaining N and H are quickly combined into stable nitrogen and hydrogen molecules to form pores, which affect the quality of the product and produce toxic gases. Harmful to human health

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