Casting is a process in which a molten metal liquid is poured into a mold and solidified by cooling to obtain a desired shape and performance. Casting is a common manufacturing method.
The advantages are: low manufacturing cost, large process flexibility, and the ability to obtain complex shapes and large castings, which account for a large proportion in mechanical manufacturing, such as machine tools accounting for 60-80%, and cars accounting for 25% tractors accounting for 50-60%.
Casting is an ancient manufacturing method that dates back to 6,000 years in China. With the development of industrial technology, the quality of casting large castings directly affects the quality of the products. Therefore, casting plays an important role in the machinery manufacturing industry. The development of casting technology is also very rapid, especially in the late 19th century and the first half of the 20th century, many new casting methods, such as low pressure casting, ceramic casting, continuous casting, etc., were perfected and put into practical use in the second half of the 20th century. .
Due to the increasing demands on casting quality, casting precision, casting cost and casting automation, casting technology is developing in the direction of precision, large-scale, high-quality, automation and cleaning. For example, in China, precision casting technology and continuous Casting technology, special casting technology, foundry automation and casting molding simulation technology have developed rapidly.
Casting Process - Process
The main processes of casting include: metal melting, model making, casting solidification and demoulding cleaning. The main materials used for casting are cast steel, cast iron, cast non-ferrous alloys (copper, aluminum, zinc, lead, etc.).
Casting Process - Type
The casting process can be divided into gravity casting, pressure casting and sand casting.
Casting methods are commonly used for sand casting, followed by special casting methods such as metal casting, investment casting, gypsum casting, and the like. Sand casting can be divided into clay sand casting, organic binder sand casting, resin self-hardening sand casting, lost foam casting and the like.
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