After the precision castings are taken out of the casting mold, they have gates, risers, metal burrs, and crevices. The castings in the lost wax casting also adhere to the sand, so they must go through the casting cleaning process. The equipment that performs this kind of work includes grinding machine, shot blasting machine, pouring riser cutting machine and so on. Sand casting sand removal is a process with poor working conditions. Therefore, when selecting a molding method, it should be considered as much as possible to create convenient conditions for sand falling.