A kind of high-strength and high-temperature resistant 3D printing clay green sand material and preparation method thereof

Abstract

The invention discloses a high-strength and high-temperature-resistance 3D printing clay green sand material and a preparation method thereof. The high-strength and high-temperature-resistance 3D printing clay green sand material is prepared from, by weight, 240-260 parts of knar clay, 11-13 parts of bentonite, 20-30 parts of hollow ceramic microspheres, 20-25 parts of magnesium silicate, 10-14 parts of serpeggiante, 12-18 parts of volcanic tuff, 3-4 parts of dried gypsum, 5-9 parts of hydroxyapatite whiskers, 15-25 parts of andalusite, 10-15 parts of nano-scale jade-like stone powder, 10-14 parts of light calcium carbonate, 7-9 parts of expanded graphite, 6-8 parts of sodium metaaluminate, 8-12 parts of spinel, 5-10 parts of starch aluminum octenylsuccinate, 3-5 parts of carboxymethylcellulose, 2-4 parts of polymine and 10-20 parts of water. The green sand has the advantages of being good in heat resistance, high in strength, good in air permeability, good in dispersity, small in number of air pores of castings, and the like.

Description

field of invention [0001] The invention relates to a molding sand, in particular to a high-strength and high-temperature-resistant 3D printing clay green sand material and a preparation method thereof. Background technique [0002] Molding sand is the material used for modeling in 3D printing. Molding sand is generally made by mixing molding materials such as raw sand for casting, molding sand binder and auxiliary additives in a certain proportion. Molding sand can be divided into clay sand, water glass sand, cement sand, resin sand, etc. according to the different binders used. Clay sand, water glass sand and resin sand are the most used. The role of molding sand in foundry production is extremely important, and the casting waste caused by poor quality of molding sand accounts for about 30-50% of the total casting waste. Generally, the requirements for molding sand are: high strength and thermal stability to withstand various external forces and high temperatures; good f...

AI Technical Summary

Problems solved by technology

Although the wet type has many advantages compared with the dry type, it has not been dried. Therefore, when the high-temperature molten steel is poured, the interface reaction between the metal and the wet type is relatively strong, and the casting is prone to some defects.

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