Fin
Metal that flows past the casting in a thin ridge at the joining edges of a mould. In some cases the edges are purposely pared down to prevent any possibility of the two edges meeting. Especially is this rule to be observed in loam and dry-sand work, where in the event of too close contact the mould is damaged by a crushed joint. The term crush is common when any part of a mould is damaged by undue pressure, etc.