What is sand casting process?

Sand casting is a kind of sand as the main modeling material, making casting traditional casting process. Sand casting is mainly used in gravity casting process:

Gravity casting refers to the liquid metal in the earth under the action of gravity into the casting process, also known as casting. Broad gravity casting, including sand casting, metal casting, investment casting, mud casting, etc.; narrow gravity casting refers to metal casting.

Sand casting is generally used in gravity casting, with special requirements can also be used in low-pressure casting, centrifugal casting and other processes. Sand casting adaptability is very wide, small pieces, large pieces, simple pieces, complex pieces, single pieces, large quantities can be used. Sand casting mold, used to be made of wood, commonly known as wood mold. Wooden mold shortcomings are easy to deformation, easy to damage; in addition to the production of sand castings in addition to a single piece, you can use the higher dimensional accuracy, and longer service life of the aluminum alloy mold or resin mold.

Although the price has increased, but still much cheaper than the metal casting mold, in small quantities and large production, the price advantage is particularly prominent. In addition, the sand type than the metal type higher fire resistance, and thus such as copper alloys and ferrous metals and other materials with high melting points are also used in this process. However, sand casting also has some shortcomings: because each sand casting can only be poured once to get the casting that casting is damaged, must be re-modeling, so the sand casting production efficiency is low; and because of the overall nature of the sand is soft and porous, so the sand casting castings of lower dimensional accuracy, the surface is also more rough.