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Glossary of Casting Terms (con't)

Density – The mass of a substance per unit volume
 
Draft (permanent mold) – A metal shape embedded in, and used to support either green or dry sand cores in the mold.
 
Drag – The bottom section of a flask, mold, or pattern
 
Draft – The angle in which a mold or pattern is designed to allow for the withdraw of sand or aluminum without distorting or tearing.
 
Draw – The amount of space required to remove a mold from a pattern
 
Drop – A substance having metallic properties and composed of two or more chemical elements of which at least one is a metal.
 
Dross – Foriegn matter: Impurity in the aluminum
 
Elongation – Percentage material can stretch before failure
 
Ferrous – Containing iron.
 
Fillet – A strip that gives a rounded appearance where two surfaces meet.
 
Fin – The characteristic of some materials such as refractory cements, core plastics, vinders, and plastics to take permanent set at normal air temperatures as opposed to thermal setting.
 
Flask – Is used to hold sand around the pattern.  Typically two halves top(cope) and bottom (drag).
 
Gate – A metal shape embedded in, and used to support either green or dry sand cores in the mold.
 
Green Sand – Molding sand mixture that has been tempered with water
 
Heat – A substance having metallic properties and composed of two or more chemical elements of which at least one is a metal.
 
Heat Treatment – A metal shape embedded in, and used to support either green or dry sand cores in the mold.
 
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