Casting process

1. Gravity casting: sand casting, hard mold casting. Rely on the gravity of the metal itself to pour molten metal into the cavity.

2. Pressure casting: low pressure casting, high pressure casting. Rely on the additional pressure to instantly press the molten metal into the casting cavity.

The casting process usually includes

①Preparation of casting molds (containers that make liquid metal into solid castings). The casting molds can be divided into sand, metal, ceramic, clay, graphite, etc. according to the materials used, and can be divided into disposable and semi-permanent types according to the number of uses. And permanent mold, the pros and cons of mold preparation are the main factors affecting the quality of castings;

②Melting and pouring of cast metals, cast metals (casting alloys) mainly include various types of cast iron, cast steel, and cast non-ferrous metals and alloys;

③ Casting processing and inspection. Casting processing includes removal of foreign bodies on the core and surface of the casting, removal of pouring risers, shoveling of burrs and drape seams, 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, mold preparation and casting processing. Casting metal refers to the metal material used for casting castings in the production of casting. It is an alloy composed of a metal element as the main component and added with other metals or non-metal elements. It is customarily called a casting alloy, mainly including cast iron, Cast steel and cast non-ferrous alloys.