There are many kinds of casting, according to the modeling method used to be divided into
The ordinary sand casting and sand casting, foundry, including wet sand, dry sand and sand chemical hardening of 3 kinds.
The special casting, special casting press molding materials can be divided into natural mineral sand as the main materials (such as casting, mud casting, shell casting, vacuum casting, mold casting, ceramic mold casting, die casting etc.) and special casting with metal casting material (mainly profiles such as metal casting, pressure casting, continuous casting, low pressure casting, centrifugal casting, etc.) two.
According to the forming process can be divided into
1: gravity casting sand casting, die casting, gravity will rely on molten metal is poured into the cavity.
2 pressure casting: low pressure casting, pressure casting. Rely on the additional pressure of molten metal into the casting cavity. The instantaneous pressure casting process usually includes
The mold (liquid metal castings become a container solid preparation, mold) according to the material used can be divided into sand, metal, ceramic, clay, graphite, according to the frequency of use can be divided into single type, semi permanent and permanent mold preparation, quality is the main factor affecting the quality of castings the;
The melting and casting metal casting, casting metal (alloy) mainly include all kinds of cast steel and cast iron, nonferrous metal and alloy;
The casting processing and inspection, casting processing cores and casting surface including the removal of foreign body, resection of sprue, grinding burrs and fash protrusions and shaping, heat treatment, anti rust treatment and rough machining.
The casting process can be divided into three basic parts, namely casting metal preparation, preparation and casting mould processing. Metal casting refers to casting pouring casting metal material used in the production, it is a kind of metal elements as the main ingredient, and adding other alloy metal or non-metallic elements formed, known as customary the main cast alloy, cast iron, cast steel and cast nonferrous alloys.
Metal smelting is not only melting, including smelting process, which poured into the metal casting, are consistent with the expected temperature, chemical composition and purity. Therefore, in the process of melting should be carried out in order to control the quality for the purpose of all kinds of test, the liquid metal in the standard rear can allow pouring.
Sometimes, in order to achieve a higher request, after he released by the molten metal in the furnace, such as vacuum degassing, desulfurization, refining, inoculation or modification. The equipment used a cupola melting metal, arc furnace, induction furnace, resistance furnace and reverberatory furnace.