High-strength high-temperature-resistance anti-deforming precoated sand and processing technology thereof

Abstract

The invention discloses a high-strength high-temperature-resistance anti-deforming precoated sand and a processing technology thereof, and belongs to the technical field of new materials. The high-strength high-temperature-resistance anti-deforming precoated sand is prepared from the following components of, by weight, 100 parts of roughing sand, 2 to 4 parts of ferroferric oxide, 1.5 to 5.6 partsof antiadhesion sand, 1.8 to 3 parts of anti-veining additive, 1.5 to 5 parts of phenolic resin, 0.5 to 1.5 parts of No.1 enhancer, 0.3 to 1.0 part of No.2 plasticizer, 0.1 to 0.5 part of urotropinesolution, and 1.2 to 2.5 parts of lubricating agent. According to the precoated sand provided by the invention, by improving and optimizing the matching ratio of raw ingredients and a preparation process, the precoated sand has the advantages of high temperature resistance, high deformation resistance, good formability, high strength, good fluidity and low gas content at the same time, fully meetsthe production technology requirements of engines of complicated structures and with high performance, and particularly meets the production technology requirements of small sand cores with complicated shapes and thick walls, so that not only are the high-temperature strength and the collapsibility of the sand core after casting during a nonferrous metal casting process ensured, but also the mechanical property of a casting piece can be further improved.

Description

technical field [0001] The invention belongs to the technical field of new materials, and particularly relates to a high-strength, high-temperature, deformation-resistant type coated sand. The invention also relates to a processing technology of a high-strength, high-temperature-resistant, deformation-resistant type coated sand. Background technique [0002] Coated sand is a material used to make sand molds (cores) in the foundry industry. Due to the advantages of high strength, low gas generation, high dimensional accuracy of production castings, smooth surface, and easy preservation, coated sand has been widely used in recent years. At present, the production process of coated sand includes cold coating method, cold-dry mixed coating method, semi-dry hot coating method and hot coating method. The product is added to the sand mixer and mixed evenly. After adding alcohol, it is mixed into a sticky block, and the sand is dried, crushed, and screened to obtain the coated sand...

AI Technical Summary

Problems solved by technology

[0003] Purpose of the invention: In order to overcome the above deficiencies, the purpose of the present invention is to provide a high-strength, high-temperature-resistant and anti-deformation coated sand, which solves the problems of low strength, easy deformation and easy collapse of the current coated sand. Process control time and temperature can improve the quality of coated sand