Cone extruder - a novel method for multilayer extrusions

Kyösti Valta, Seppo Syrjälä, Mikko Karttunen, Richard Phillips, Kari Kirjavainen

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)


A novel extrusion technology has been developed for multilayer plastics processing. The starting point of this work was well known problems with conventional extrusion heads: the marks from the spider legs and the weldline of the crosshead remain in the product and weaken its mechanical and electrical properties.
Uniform flow in the die exit is also difficult to obtain in a wider operational window. Another objective was the helical orientation of fibres, layer by layer, to create cross orientated structures.
Original languageEnglish
Pages (from-to)400-406
JournalPlastics, Rubber and Composites Processing and Applications
Issue number9
Publication statusPublished - 1998
MoE publication typeA1 Journal article-refereed

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