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2021
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What are the casting processes?
The main casting processes include: metal smelting, model making, pouring solidification, and demolding cleaning. The main materials used in casting include cast steel, cast iron, and cast non-ferrous alloys (copper, aluminum, zinc, lead, etc.).
Main Casting The process includes: metal smelting, model making, pouring solidification, and demolding cleaning. The main materials used in casting are cast steel, cast iron, and cast non-ferrous alloys (copper, aluminum, zinc, lead, etc.).
Casting process
Special Casting The process includes centrifugal casting, low pressure casting, differential pressure casting, pressure casting, gypsum casting, ceramic casting and other methods.
Die casting
Die casting refers to the process of injecting molten metal into a mold under the action of other external forces (excluding gravity). Broad die-casting includes pressure casting of die-casting machines and vacuum casting, low-pressure casting, centrifugal casting, etc.; Narrow pressure casting refers to metal die-casting of die-casting machines, referred to as die-casting. These casting processes are commonly used and relatively low-priced in non-ferrous metal casting.
Metal mold casting
Metal mold casting is a modern technology in which casting is a hollow mold made of metal (heat-resistant alloy steel, ductile iron, heat-resistant cast iron, etc.).
Metal molds can be gravity casting or pressure casting. Metal molds can be reused. Each time molten metal is poured, a casting is obtained. It has a long life and high production efficiency. Metal castings not only have good dimensional accuracy and a smooth surface, but also have higher strength than sand castings, and are not easily damaged when pouring the same molten metal. Therefore, in the mass production of small and medium-sized non-ferrous metal castings, as long as the melting point of the casting material is not too high, metal casting is generally selected. However, metal mold casting also has some disadvantages: because the cost of heat-resistant alloy steel and the processing cost of making hollow cavities on it are high, the cost of metal molds is high, but the overall cost of die-casting molds is low. too much. For small batch production, the mold cost allocated to each product is obviously too high and is generally not easily accepted. And because metal molds are limited by the size of the mold material and the capacity of cavity processing equipment and casting equipment, there is nothing to do for particularly large castings. Therefore, metal mold casting is rarely used for small batch and large parts production. In addition, although metal molds are made of heat-resistant alloy steel, their heat resistance is still limited. It is generally used for casting aluminum alloys, zinc alloys, and magnesium alloys. It is less used in copper alloy casting, but it is used in ferrous metal casting. Even less.
Casting
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