The molding method of pouring, injecting, sucking molten metal into the mold cavity obtaining a blank part with a certain shape, size performance after solidification is called casting.

Because casting uses the next liquid forming process, it has wide adaptability to material types part shapes, sizes, production batches. It is particularly suitable for the gradual production of complex shapes, the production cost is low. It is important in machinery manufacturing. Status role. However, the characteristics of liquid forming also make castings have many processes, the quality of castings is difficult to control, the mechanical properties of castings are also low.

According to the different molding methods, casting is divided into sand casting special casting.