Encyclopedia Article


Extrusion is a process in which a tough or difficult to work with material, often metal, is pushed through a mold or die to become a particular shape. More generally, it refers to the process of forcing something out or to reshaping an object by moving it through another element, such as a hole.

Photo Credit: 

"Aluminium extrusions (channels), July 9, 2012" by Barnshaws Metal Bending Ltd is licensed under CC BY-NC-ND.

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