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HOME| Casting Comparison Matrix
The Sand Casting process includes packing sand around a pattern to form amold. A pattern is the same form, allowing for shrinkage, that the final castingwill be. The mold is in 2 parts so the pattern can then be removed and the metalpoured in to the resulting cavity. We use a synthetic sand that is mixed with abinder so it forms a smooth surface when packed.
The castings are finished by removing the parting line and gating areas. Thecastings are then sand or glass bead blasted or tumbled in ceramic chips toenhance the finish.
Sand Casting has very low tooling costs and the part cost is below average.Die-Casting, Permanent molding, and investment casting (lost wax) all can havetooling costs that are several times that of sand casting. Also with sandcasting it is fairly easy to make design changes to the pattern without having toretool.
For these reasons Sand Casting is especially good for large parts andprototyping, or other short runs where tooling costs are a significant factor.