Process	Extrusion
	Produces profiles with open or hollow cross sections. A relatively inexpensive way of getting fairly complex cross section geometry. Extruded profiles can be further processed with bending and pressing. In extrusion the material is forced to flow through a die opening to produce a desired cross sectional shape. The process reminds of squeesing toothpaste out of a toothpaste tube. If the material is heated befores processing it is referred to as hot extrusion, otherwise cold extrusion.
Danish Name	Ekstrudering
Category	Mass conserving processes, Metal forming
Materials	Aluminium, Copper, Magnesium, Zinc, Tin
Typical products	Paper puncher Bicycle frame Mast for sailing boat Dolphin bicycle trailer Car bumber Curtain rail Window blinds Window frame panel
References	The European Aluminium Association Alucluster Hydro Aluminium Tønder
Photo	Thomas Nissen (Computer graphics)
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