Pre burnt starch casting sand material

Foundry sand is casting essential raw materials, its performance determines the quality of post-casting. To achieve casting requirements, often want to add a foundry sand binder. Characteristics of Jian-sand binder is a low viscosity liquid binder ①, sand lightly when mixed with sand, and sand mixed good mobility, can be made into a complex shape, accurately reflect the appearance of the surface shape of the sand and core ② curing speed, preferably without heating can be cured, in order to save energy and use low-cost non-metal or aluminum look and the core box. If they can take to harden after stripping method can significantly improve the shape and size of the fine cast. ③ after hardening high strength, can be used to manufacture complex shape, thin section of the core, and reduce the amount of the binder is added in order to reduce production costs and reduce casting casting process gas generation amount, reducing casting porosity defects may ④ made of less gas is required to heat the adhesive gas evolution is slow, less. For other types of castings and low nitrogen content also requires a binder, to prevent the skin pores, pinholes and other defects ⑤ good collapsibility, the binder can be self-decomposed by the high temperature records, to prevent internal stress after solidification, cracks, and sand casting easily. It also requires that the binder is not easy to absorb moisture or deterioration after the sand can be used for a long time, does not adhere to the appearance and core box, harmless, environmental pollution, sources rich, low prices. Packaging and storage Packaging: woven bag lined with plastic film bag, net weight 25kg. Storage: One year.