EML2322L – Design & Manufacturing Laboratory Casting & Forging Facts Casting is pouring molten liquid into a mold where it is subsequently allowed to cool & solidify before ejection for use. Casting is used for producing parts to near-net (i.e. near-final) shape. The molds can range from very cheap sand molds to elaborately machined chromium-steel molds costing well into the 6 figure range. Since molten metal is poured into the mold, the final shape can be quite intricate and can contain both external and internal (i.e. hollow) features. Due to the fact that almost all metals shrink when cooled, the mold design can be a complex undertaking and the final surface finish and feature tolerances are typically low (i.e. casting produces rough surfaces and tolerances in range of ±0.030”). However, important features can be finish-machined after the casting is removed from the mold. The casting process is used for complex low volume parts as well as high volume production. The three most common types of casting include sand casting, investment casting and die casting.
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This note was uploaded on 10/18/2011 for the course EML 2023L taught by Professor M.braddock during the Spring '11 term at University of Florida.