Advantage of sand casting

[Rose Lin]

Sand which is used for casting is called the moulding sand. Appropriate quantity of water is used to mix the sand to avoid the sand from being waterlogged. In mixing the sand with water, the water is sprinkled on the dry moulding instead of pouring. When the water is poured, it can result to excess.

 

Most sand casting operations use silica sand (SiO₂). A great advantage of sand in manufacturing applications is that sand is inexpensive. Another advantage of sand to manufacture products by metal casting processes, is that sand is very resistant to elevated temperatures. In fact, sand casting is one of the few processes that can be used for metals with high melting temperatures such as steels, nickel, and titanium. Usually sand used to manufacture a mold for the casting process is held together by a mixture of water and clay. A typical mixture by volume could be 89% sand, 4% water, 7% clay. Control of all aspects of the properties of sand is crucial when manufacturing parts by sand casting, therefore a sand laboratory is usually attached to the foundry.