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Sand casting is a mold based net shape manufacturing process in which metal parts are molded by pouring molten metal into a cavity. The mold cavity is created by withdrawing a pattern from sand that
Moulding sand: Sand, which binds strongly without losing its permeability to air or gases. It is a mixture of silica sand, clay, and moisture in appropriate proportions. Facing sand: The small amount of carbonaceous material sprinkled on the inner surface of the mould cavity to give a better surface finish to the castings. Important casting terms
Sand Casting. Metal castings produced in sand molds. Sand Control. Procedure whereby various properties of foundry sand, such as fineness, permeability, green strength, moisture content, etc., are adjusted to obtain castings free from blows, scabs, veins, and similar defects. Sand Porosity. Volume of the pore spaces or folds in a sand.
Casting Terminology. Mold cavity- combination of the mold material and cores. Riser-additional void in the mold that provides additional metal to compensate for shrinkage. Gating system- network of channels that delivers the molten metal to the mold.
Advantages of Casting • Complex shapes • Parts can have hollow sections or cavities • Very large parts • Intricate shaping of metals that are difficult to machine • Different mold materials can be used –Sand, metal, or ceramics • Different pouring methods
This Glossary of Metalcasting Terms provides the casting designer and purchaser with practical definitions of common metalcasting phrases and terms. AQL Acceptable Quality Level. A quality level established on a prearranged system of inspection using samples selected at random.
Sand casting is an economical method of producing metal parts in quantities from one-offs to high volume. It’s the nature of the process that sand cast parts will require machining.
