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Published in: Applied Composite Materials 6/2009

01-12-2009

Flow Properties of Tailored Net-Shape Thermoplastic Composite Preforms

Authors: S. T. Jespersen, F. Baudry, M. D. Wakeman, V. Michaud, P. Blanchard, R. Norris, J-A. E. Månson

Published in: Applied Composite Materials | Issue 6/2009

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Abstract

A novel thermoplastic programmable preforming process, TP-P4, has been used to manufacture preforms for non-isothermal compression molding. Commingled glass and polypropylene yarns are deposited by robot onto a vacuum screen, followed by a heat-setting operation to stabilize the as-placed yarns for subsequent handling. After an optional additional preconsolidation stage, the preforms are molded by preheating and subsequent press forming in a shear edge tool. The in- and out-of-plane flow capabilities of the material were investigated, and compared to those of 40 wt% Glass Mat Thermoplastics (GMTs). Although the TP-P4 material has a fiber fraction of 60 wt%, the material could be processed to fill 77 mm deep ribs with a thickness of 3 mm, indicative of complex part production. The pressure requirements for out-of-plane flow were shown to depend on the fiber length and fiber alignment. Segregation phenomena were found to be less severe with TP-P4 than with GMT material.

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Metadata
Title
Flow Properties of Tailored Net-Shape Thermoplastic Composite Preforms
Authors
S. T. Jespersen
F. Baudry
M. D. Wakeman
V. Michaud
P. Blanchard
R. Norris
J-A. E. Månson
Publication date
01-12-2009
Publisher
Springer Netherlands
Published in
Applied Composite Materials / Issue 6/2009
Print ISSN: 0929-189X
Electronic ISSN: 1573-4897
DOI
https://doi.org/10.1007/s10443-009-9103-9

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