Investment casting, also known as lost wax casting, including pressure wax, wax, group tree, Dip, wax, casting metal liquid and post-treatment processes. Lost wax casting is the wax mold to make the parts to be made of wax, and then the wax mold is coated with mud, this is the mud mold. After drying the mud mold, melt the internal wax mold into hot water. The clay mold of the melted wax mold is removed and then roasted into Tao. Once roasted.
Generally made of mud mold left the pouring mouth, and then poured into the molten metal from the pouring mouth, cooling, the required parts are made.