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	© 1996-2019 Torben Lenau This page is part of Design inSite Disclaimer