Precision casting


Precision casting refers to the general term for the process of obtaining precise size castings. Compared with the traditional sand casting process, the castings obtained by precision casting are more accurate in size and have better surface finish. It includes: investment casting, ceramic casting, metal casting, pressure casting, 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. Among them, investment casting, also known as lost wax casting, is more commonly used: select suitable investment materials (such as paraffin) to make investment; repeat the process of dipping refractory paint and spreading refractory sand on the investment, hardening the shell and drying; Melt the internal investment mold to obtain the cavity; bake the shell to obtain sufficient strength and burn off the remaining investment material; pour the required metal material; solidify and cool, and remove the sand after shelling, so as to obtain high Precision finished product. Heat or cold work and surface treatment as required by the product.