Precision casting is the general term for the process of obtaining accurate size castings. Compared with the traditional sand casting process, the casting size obtained by precision casting is more accurate and the surface finish is better. It includes investment casting, ceramic mold casting, metal mold casting, pressure casting and lost foam casting.
Precision casting is also called lost wax casting. Its products are precise, complex and close to the shape of parts. It can be used directly without processing or with little processing. It is an advanced technology of near net shape forming.
It includes investment casting, ceramic mold casting, metal mold casting, pressure casting and lost foam casting.
Among them, investment casting, also known as lost wax casting, is more commonly used; Repeat the process of dipping refractory coating and spreading refractory sand on the investment mold, harden the shell and dry it; Then the internal investment mold is dissolved to obtain the cavity; The shell is roasted to obtain enough strength, and the residual investment material is burned off,; Metal materials required for casting; Solidification cooling, shelling and sand cleaning, so as to obtain high-precision finished products. Heat treatment, cold working and surface treatment according to product requirements.
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