Dalian sand blasting process adopts sand blasting process, which can clean the oxide scale and residues on the surface of precision castings, play the role of polishing and improve the surface finish of castings, such as aeroengine turbine blades, surgical instruments, jewelry and so on. It can also make the casting parts show the same metal color and make the appearance of the parts more beautiful. Such as: various instrument housings, frames, etc. Sand blasting process, as a finishing method, has good effect. In particular, the polishing of complex surface parts, such as impeller, engine blade and various mold surfaces (currency mold, incense coin and commemorative coin mold) is unmatched by any other method. It is an economical method to polish ceramic, diamond, gold and silver jewelry by sand blasting. Because the sand blasting process has so many advantages, it is widely used in various fields. With the more and more large-scale parts and molds, the sand blasting process also tends to develop in the direction of large-scale.