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impact extrusion

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noun Metalworking.
  1. an extrusion process in which a slug of cold metal in a shallow die cavity is formed by the action of a rapidly moving punch that forces the metal through the die or back around the punch.
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Origin of impact extrusion

First recorded in 1930–35
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018