Casting classification

There are many types of casting, which are customarily divided into:
①Ordinary sand casting, including wet sand, dry sand and chemically hardened sand.
②Special casting, according to the modeling material, it can be divided into special casting with natural mineral sand as the main modeling material (such as investment casting, mud casting, casting workshop shell casting, negative pressure casting, solid casting, ceramic casting etc.) and special castings with metal as the main casting material (such as metal mold casting, pressure casting, continuous casting, low pressure casting, centrifugal casting, etc.).
The casting process usually includes:
①Preparation of casting molds (containers that make liquid metal into solid castings). According to the materials used, casting molds can be divided into sand molds, metal molds, ceramic molds, clay molds, graphite molds, etc. The quality of mold preparation is the main factor affecting the quality of castings;
②Melting and pouring of cast metals, cast metals (cast alloys) mainly include cast iron, cast steel and cast non-ferrous alloys;
③ Casting treatment and inspection, casting treatment includes removal of foreign matter on the core and casting surface, removal of pouring risers, relief grinding of burrs and seams and other protrusions, as well as heat treatment, shaping, anti-rust treatment and rough machining.  

The casting process can be divided into three basic parts, namely casting metal preparation, casting mold preparation and casting processing. Cast metal refers to the metal material used for casting castings in casting production. It is an alloy composed of a metal element as the main component and other metals or non-metal elements are added. It is customarily called casting alloy, mainly including cast iron, Cast steel and cast non-ferrous alloys.