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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
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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.
By far sand casting is the most versatile of the various methods and techniques of forming metals which include forging, punching, rol¬ ling, stamping, extrusion and many others.
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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.
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
