Category Archives: Glossary

Waterline

A tube or passage through which water is circulated to cool a casting die.

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Void

A large pore or hole within the wall of a casting usually caused by entrapped gas. A blow hole.

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Vent

Narrow passage at the die parting which permits air to escape from the die cavity as it is filled with molten metal.

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Undercut

Recess in the side wall or cored hole of a casting disposed so that a slide or special form of core (such as a knockout) is required to permit ejection of the casting from the die.

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Toggle

Linkage employed to mechanically multiply pressure when locking the dies of a casting machine.

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Sprue pin

A tapered pin with rounded end projecting into a sprue hole and acting as a core which deflects metal and aids in the removal of the sprue.

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Sprue

Metal that fills the conical passage (sprue hole) which connects the nozzle with runners.

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