Process	Extrusion
	Profiles of all shapes can be produced. In an extruder the material is heated and continuosly pushed by a rotating screw through a die with the shape of the profile. After the die, the profile is cooled by air or water and cut into desired lengths. Production volumes are normally high.
Danish Name	Ekstrudering
Category	Mass conserving processes, Shaping plastics
Materials	Most plastics
Typical products	Garden hose Ice cube plastic bag Metal sheet edge protection Potholder Railings Tubes
Competing processes	Injection moulding Blow moulding Pultrusion Calandering
References	DKI Plast A/S Vestfos Plast A/S Glim Plastic Industri ApS
Price notes	Tooling cost for pultrusion is high - but lower than for injection moulding. On the other hand the process enables mass-production and short cycle times, and therefore the cost per part is low.
Photo	Thomas Nissen (Computer graphics)
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