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)
Copyright © 1996-2003 Torben Lenau
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