Casting is a manufacturing process in which molten metal liquid is poured into a die casting mold, and then cooled and condensed to obtain the required shape and function of the parts. Casting is a common manufacturing method

The strengths are: low manufacturing cost, high process sensitivity, the ability to obtain messy shapes and large castings, and occupy a large proportion in machinery manufacturing, such as machine tools accounting for 60 to 80%, automobiles accounting for 25%, tractors accounting for 50 to 60%.

Casting is an ancient manufacturing method that can be traced back to 6000 years ago in our country. With the development of industrial skills, the quality of large castings directly affects the quality of products. Therefore, casting occupies an important position in the machinery manufacturing industry. The development of casting skills is also very rapid, especially in the late 19th century and the first half of the 20th century. Many new casting methods were presented, such as low pressure casting, ceramic casting, continuous casting, etc., which were perfected and useful in the second half of the 20th century. .
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Due to the advancement in requirements for casting quality, casting accuracy, casting cost and casting automation,  die casting skills are developing in the direction of refinement, large-scale, high-quality, automation and cleanliness. It is agile in casting skills, special casting skills, casting automation, and casting structure imitation skills.

The main process of casting includes: metal smelting, model making, pouring coagulation and demoulding finishing. The primary materials for casting are cast steel, cast iron, cast non-ferrous alloys (copper, aluminum, zinc, lead, etc.).

The casting process can be divided into gravity casting, pressure casting and sand casting.

The commonly used casting method is sand casting, followed by special casting methods, such as: metal casting, investment casting, plaster casting, etc. Sand casting can be divided into clay sand casting, organic binder sand casting, resin self-setting sand casting, lost foam casting and so on.

Gravity casting refers to the process of injecting molten metal into a mold under the effect of the earth’s gravity, also known as casting. In a broad sense, gravity casting includes sand casting, metal casting, investment casting, mud casting, etc.; gravity casting in a narrow sense refers specifically to metal casting.

Pressure casting refers to the process of injecting molten metal into the mold under the effect of other external forces (excluding gravity). The broad sense of pressure casting includes die casting, low pressure casting, centrifugal casting, etc.; the narrow meaning of pressure casting specifically refers to the metal die casting of the die casting machine, referred to as die casting. These casting processes are the most commonly used in non-ferrous metal casting and the lowest relative price.

Sand casting is a traditional casting process that uses sand as the primary modeling material to make molds.