Low-cost molding sand

Abstract

The invention discloses low-cost molding sand. The low-cost molding sand is composed of raw materials including, by weight, 30-35 parts of quartz sand, 15-20 parts of white sand, 20-25 parts of magnesia, 30-38 parts of clay, 10-16 parts of silicone rubber, 3-5 parts of a binder, 5-10 parts of talcum powder, 2 parts of chlorinated paraffin and 2 parts of boric acid. The low-cost molding sand is lowin production cost, and the problems of sand falling difficulties and old sand regeneration difficulties are solved.

Description

technical field [0001] The invention relates to a molding sand, especially a low-cost molding sand. Background technique [0002] Molding sand is a material used for molding in casting. 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. The effect of molding sand in foundry production is extremely important, and the casting waste product that causes because of the bad quality of molding sand accounts for about 30~50% of casting total waste product. The bonding ability of molding sand is an important indicator to measure the quality of molding sand. The existing molding sand usually uses water glass as a binder to make water glass sand. Although the bonding effect is better, but because water glass is more expensive, so The manufacturing cost of molding sand is also relatively high, and in the actual use of water glass sand, there will be problems such as difficulty in...

AI Technical Summary

Problems solved by technology

The bonding ability of molding sand is an important indicator to measure the quality of molding sand. The existing molding sand usually uses water glass as a binder to make water glass sand. Although the bonding effect is better, but because water glass is more expensive, so The manufacturing cost of molding sand is also relatively high, and in the actual use of water glass sand, there will be problems such as difficulty in falling sand and difficult regeneration of old sand.