casting
close Foundry is a metal hot working process that has been mastered for about 6000 years. China has entered the heyday of bronze castings between 1700 BC and 1000 BC, and the technology has reached a very high level. Casting refers to the process of melting solid metal into liquid and pouring it into a mold of a specific shape to be solidified. The metals to be cast include copper, iron, aluminum, tin, lead, etc. The materials for ordinary casting are raw sand, clay, water glass, resin and other auxiliary materials. Special casting mold includes investment casting, lost foam casting, metal mold casting, ceramic mold casting, etc. (Raw sand includes quartz sand, magnesite, zirconium sand, chromite sand, forsterite sand, kyanite sand, graphite sand, iron sand, etc.)