The modeling methods of metal casting types are customarily divided into:

① Ordinary sand casting, including green sand mold, dry sand mold and chemical hardened sand mold.

② Special casting, according to the modeling materials, can be divided into special castings with natural mineral sand and gravel as the main modeling materials (such as investment casting, mud casting, casting workshop shell casting, negative pressure casting, There are two types: solid mold casting, ceramic mold 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 metal casting process usually includes:

① Preparation of casting molds (containers that turn liquid metal into solid castings). Casting molds can be divided into sand molds, metal molds, and ceramic molds according to the materials used. , clay mold, graphite mold, etc., can be divided into disposable type, semi-permanent type and permanent type according to the number of uses. The quality of casting mold preparation is the main factor affecting the quality of castings;

② Melting of cast metal With pouring, cast metals (cast alloys) mainly include cast iron, cast steel and cast non-ferrous alloys;

③ Casting processing and inspection, casting processing includes cleaning the core and foreign matter on the surface of the casting, removing the pouring riser, shoveling Grinding of protrusions such as burrs and seams, as well as heat treatment, shaping, anti-rust treatment and rough machining.