Casting is a kind of metal hot working technology that human beings mastered earlier. China entered the heyday of bronze casting from about 1700 BC to 1000 BC, and its technology reached a fairly high level. Casting is a method that liquid metal is poured into the casting cavity suitable for the shape of the part, and after cooling and solidification, the part or blank can be obtained ?
The casting process can be divided into three basic parts, namely, casting metal preparation, mold preparation and casting treatment. Casting metal refers to the metal material used to pour castings in casting production. It is an alloy with a metallic element as the main component and other metallic or nonmetallic elements. Traditionally called cast alloy, it mainly includes cast iron, cast steel and cast nonferrous alloy.
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The materials often used in casting production are various metals, coke, wood, plastics, gas and liquid fuels, modeling materials and so on. The required equipment includes various furnaces for smelting metals, sand mixers for mixing sand, molding machines for making cores, core-making machines, sand mixers for cleaning castings and shot blasting machines. There are also machines and equipment for special casting and many transportation and material handling equipment.
Casting production is different from other processes, such as wide adaptability, many materials and equipment, and great environmental pollution. Foundry production will produce dust, harmful gas and noise pollution to the environment, which is more serious than other mechanical manufacturing processes and needs to be controlled by measures.
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