Gravity casting refers to the process in which molten metal is poured into the mold under the action of the earth's gravity, also known as casting. Gravity casting in a broad sense includes sand casting, metal casting, investment casting, lost foam casting, mud casting, etc.; gravity casting in a narrow sense refers to metal casting.

  Gravity die casting refers to the process of injecting molten metal into the mold under the action of other external forces (excluding gravity). Die casting in a broad sense includes pressure casting of die casting machine and vacuum casting, low pressure casting, centrifugal casting, etc.; pressure casting in a narrow sense refers to metal type pressure casting of die casting machine, referred to as die casting. The precision casting factory has been engaged in gravity casting of sand mold and metal mold for a long time. 

  These casting processes are the most commonly used in non-ferrous metal casting, and they are also relatively cheap. Sand casting is a traditional casting process that uses sand as the main molding material to make molds. Sand molds generally adopt gravity casting, and low-pressure casting, centrifugal casting and other processes can also be used when there are special requirements.