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Molding
Clinch River Casting is a No Bake Foundry. “No Bake” or “Air Set” is a chemically bonded sand. Clinch River Casting employs a Phenolic Urethane resin system. The advantages of No Bake over Green Sand foundries are an improved surface finish, dimensional accuracy, larger castings, and lower tooling costs.
Common Molding Terms
Mold – The sand form that contains the cavity into which molten metal is poured to produce a casting.
Pattern – A form, generally wood or metal, which sand is compacted around to make a mold for casting.
Cope – The upper or top section of a mold.
Drag – The lower or bottom section of a mold.
Core – A preformed sand shape inserted into a mold to shape the interior of a casting.
Core Print – Projections attached to a pattern in order to form recesses in the mold at points where cores are to be supported.
Draft – The taper on the sides of a pattern, that are perpendicular to the parting plane, which allows the pattern to be withdrawn from the mold.
Pattern Shrinkage – Contraction allowance made on patterns to compensate for the decrease in dimensions as a casting cools in the mold.
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