Including: investment casting, ceramic mold casting, metal mold casting, pressure casting, lost foam casting.Among the more commonly used is the investment casting, also known as the lost wax casting: choose appropriate casting material (such as paraffin) manufacturing investment;Touch on casting refractory coating and sand and refractory process, sclerosis type shell and dry;Then the internal casting melt away, get the cavity;Roasting shell in order to obtain enough strength, and the casting material, burning residual;Casting need metal materials;After shelling solidification cooling, deoxidization, can achieve the high precision finished products.According to the requirements of the product or heat treatment and cold working and surface treatment.