High-green-compression-strength green moulding sand for iron casting and preparation method of high-green-compression-strength green moulding sand

Abstract

The invention discloses high-green-compression-strength green moulding sand for an iron casting and a preparation method of the high-green-compression-strength green moulding sand. The high-green-compression-strength green moulding sand is prepared from, by weight, 38-52 parts of imvite, 42-64 parts of natural manganese sand, 24-36 parts of silico-calcium slag, 19-31 parts of titanaugite, 16-24 parts of granite waste, 10-15 parts of asbestos wool, 15-25 parts of cancrinite, 11-19 parts of fibrolite, 8-12 parts of barium metaphosphate, 6-9 parts of polyester propylene glycol, 5-7 parts of polyamide polyamine epichlorohydrin resin and 510-570 parts of a modifying agent. By means of the raw materials such as the natural manganese sand, the silico-calcium slag, the asbestos wool, the barium metaphosphate, the polyester propylene glycol and the polyamide polyamine epichlorohydrin resin, on the basis of guaranteeing that the moulding sand has good breathability, the green compression strength of the moulding sand is remarkably improved, and box crushing, swelling and leaking can be effectively avoided. The prepared moulding sand has the advantages of being high in green compression strength, good in breathability and plasticity and the like, and is suitable for the iron casting and wide in application prospect.

Description

technical field [0001] The invention relates to green molding sand with high wet compressive strength for iron castings and a preparation method thereof, belonging to the technical field of molding sand. Background technique [0002] Sand casting is the most common casting method, and molding sand is the most important molding material in the current molding process. 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. Castings produced with sand molds account for more than 80% of the total casting production. The quality of molding sand directly affects the appearance quality of castings and casting defects such as sand holes, pores, and sand inclusions. With the continuous development of casting technology, the requirements for the performance of molding sand are getting higher and higher. The molding sand currently on the market has the disadvantage of low wet compre...

AI Technical Summary

Problems solved by technology

With the continuous development of casting technology, the requirements for the performance of molding sand are getting higher and higher. The molding sand currently on the market has the disadvantage of low wet compressive strength, which is prone to collapse, expansion and leakage.