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riser

casting

Also known as: feeder

Learn about this topic in these articles:

casting

In metallurgy: Sand-casting
Sometimes additional spaces, called risers, are added to the casting to provide reservoirs to feed this shrinkage. After solidification is complete, the sand is removed from the casting, and the gate is cut off. If cavities are intended to be left in the casting—for example, to form a hollow…
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