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what is sand mold casting mold process and advantage

Sand casting molding process
Sand casting is a sand as the main molding material, production mold of the traditional casting process. Sand generally use gravity casting, may also have low pressure casting, centrifugal casting process when there are special requirements. Sand casting wide adaptability, small pieces, large, simple parts, complex parts, a single, large quantities can be used. Sand casting molds, before Wood Productions, known as wood mold. My company to change wooden mold easily deformed, easy to damage and other ills, in addition to single-piece production of sand casting, all changed the size of high precision, and long life aluminum mold or resin mold. Although the price has increased, but still cast metal type than the much cheaper molds used in the production of small batches and large, the price advantage is particularly prominent. In addition, sand refractoriness higher than the metal type, and thus a higher melting point materials such as copper alloys and ferrous metals, also adopt this technology. However, sand casting, there are some shortcomings: Because each sandy mold casting only once, after obtaining the casting mold that is damaged, it must re-shape, so the lower sand casting production efficiency; and because of the overall nature of the soft sand The porous, so the lower sand casting casting dimensional accuracy, surface too rough. However, the accumulation of technology precision castings plant set for many years, has greatly improved the surface condition of sand casting, shot after effects which can be comparable with metal castings.

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