Process Pultrusion
This process enables the production of large series of continous fibre reinforced profiles with constant section.

A set of fibres is pulled through a plastic bath and then through a heated die which give the profile its shape. After the die the profile is cooled by air or water and cut into desired lengths.

An advantage for the process is that it is a relatively inexpensive way to produce reinforced parts with long fibres. Strength and other properties are better in the fibre direction than across.
Danish Name Pultrudering
Category Mass conserving processes, Shaping plastics
Materials Most used:
Glass reinforced resins
Possible:
Carbon reinforced epoxy
Carbon reinforced thermoplastics
Typical products Pedestrian bridge
Ladder
Stairs & railing
Slat grill
Composite floor
Competing processes Extrusion
References Elektro-Isola A/S
Fiberline Composites A/S
Tunetanken A/S
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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