Sand mold casting method

Abstract

The invention discloses a sand mold casting method, and belongs to the technical field of metal material casting. The sand mold casting method comprises the following steps that S1, a mold is manufactured and made of non-magnetic materials; S2, in parts by weight, 100 parts of metal sand and 2-4 parts of a water glass binder are evenly mixed to prepare molding sand; S3, the mold is placed in a sand box, then the molding sand is filled until the sand box is full, and thus a casting mold is formed; S4, a sprue and a riser are formed, and the box is closed; S5, the sand box is heated; and S6, metal liquid is injected into the casting mold, and after the metal liquid is solidified to form a casting, shakeout and shot blasting treatment are conducted. According to the sand mold casting method,the metal sand casting mold and inclined pouring are adopted, a mold cavity is high in stability, mold filling is stable, generation of slag inclusion can be reduced, casting mold exhaust is facilitated, the defect of air holes is overcome, and mechanical properties of the casting are high.

Description

technical field [0001] The invention relates to the technical field of metal material casting, in particular to a sand casting method. Background technique [0002] Sand casting refers to the casting method of producing castings in sand. The casting mold used in sand casting is generally composed of an outer sand mold and a core; steel, iron and most non-ferrous alloy castings can be obtained by sand casting. Because the molding materials used in sand casting are cheap and easy to obtain, the casting mold is simple to manufacture, and can be adapted to single-piece production, batch production and mass production of castings, and has been the basic process in casting production for a long time. At present, 60 to 70% of castings are produced in sand molds internationally. However, since the molding material in sand casting is sand, its overall nature is soft and porous, so the sand mold formed by it has poor stability and is easy to collapse and deform. The pouring process n...

AI Technical Summary

Problems solved by technology

However, since the molding material in sand casting is sand, its overall property is soft and porous, so the sand mold made of it has poor stability and is easy to collapse and deform. The pouring process needs to be very careful, and a little carelessness will lead to sand mold damage and pouring failure. Especially in the case of larger castings, longer castings, and higher casting precision requirements, the traditional sand casting process has certain difficulties; secondly, the thermal conductivity of sand molds is small, which is likely to cause coarse grains, loose structures, sand holes, pores, etc. Numerous defects, resulting in lower mechanical properties of castings