Zhengzhou EverBright Machinery Co.,Ltd
Mobile : +8613213152686
Address: No.93 building, Headquarters Enterprise Base, High-Tech Zone, Zhengzhou City, Henan Province, China
The basic raw materials for making sand are foundry sand and sand binder. The most common foundry sand is siliceous sand. Zinc sand, chromite ore, corundum sand and other special sands are used when the high temperature performance of silica sand cannot meet the requirements. In order to make the sand mold and the core have a certain strength, when the liquid metal is conveyed, combined and poured, it is not deformed or damaged. Generally, a sand binder is added in the casting, and the loose sand is bonded to form sand. The most widely used molding sand binder is clay, and various drying oils or semi-drying oils, water-soluble silicates or phosphates, and various synthetic resins can be used as the molding sand binder. The external sand type used in sand casting is divided into three types: clay wet sand type, clay dry sand type and chemical hardening sand type.