Describe in detail what is precision casting, including those types?
Precision casting refers to the general term for obtaining precision-sized 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 final shape of the part. It can be used directly without processing or with little processing. It is an advanced technology with near net shape.
It includes: investment casting, ceramic mold casting, metal mold casting, pressure casting, and lost foam casting.
One of the more commonly used is investment casting, also known as lost wax casting: choose suitable investment materials (such as paraffin) to make investment molds; repeat the steps of dipping refractory paint and sprinkling refractory sand on the investment mold, hardening the shell and drying; then Melt the internal investment mold to obtain a cavity; bake the mold shell to obtain sufficient strength and burn off the remaining investment material; cast the required metal materials; solidify and cool, and clean the sand after the shelling, thereby obtaining high Precision finished product. According to product needs or heat treatment, cold processing and surface treatment.