Precision casting refers to the general term for the process of obtaining precision dimensional castings. Compared to traditional sand casting technology, precision casting produces castings with more precise dimensions and better surface smoothness. It includes investment casting, ceramic casting, metal casting, pressure casting, and lost foam casting.

Precision casting, also known as wax loss casting, produces products that are precise, complex, and close to the shape at the end of the part. They can be used directly without or with minimal processing, and are an advanced technology for near net forming.

The most commonly used one is investment casting, also known as wax loss casting: selecting suitable investment materials (such as paraffin) to manufacture investment molds; Repeatedly apply refractory coating and sprinkle refractory sand on the investment mold, harden the shell and dry it; Dissolve the internal mold to obtain the mold cavity; Roast the shell to obtain sufficient strength, burn off residual investment materials, and pour the required metal materials; Solidification cooling, sand cleaning after shelling, in order to obtain high-precision finished products. According to product requirements, heat treatment, cold processing, and surface treatment should be carried out.