Rapid Processing of Net-Shape Thermoplastic Planar-Random Composite Preforms
A novel thermoplastic composite preforming and moulding process is investigated to target cost issues in textile composite processing associated with trim waste, and the limited mechanical properties of current bulk flow-moulding composites. The thermoplastic programmable powdered preforming process (TP-P4) uses commingled glass and polypropylene yarns, which are cut to length before air assisted deposition onto a vacuum screen, enabling local preform areal weight tailoring. The as-placed fibres are heat-set for improved handling before an optional preconsolidation stage. The preforms are then preheated and press formed to obtain the final part. The process stages are examined to optimize part quality and throughput versus processing parameters. A viable processing route is proposed with typical cycle times below 40 s (for a plate 0.5 x 0.5 m(2), weighing 2 kg), enabling high production capacity from one line. The mechanical performance is shown to surpass that of 40 wt.% GMT and has properties equivalent to those of 40 wt.% GMTex at both 20A degrees C and 80A degrees C.
[Jespersen, S. T. Baudry, F. Schmaeh, D. Wakeman, M. D. Michaud, V. Manson, J. -A. E.] Ecole Polytech Fed Lausanne, Lab Technol Composites & Polymeres LTC, CH-1015 Lausanne, Switzerland. [Blanchard, P.] Ford Motor Co, Ford Res & Innovat Ctr, Dearborn, MI 48124 USA. [Norris, R. E.] Oak Ridge Natl Lab, US Dept Energy, Oak Ridge, TN 37831 USA. Manson, JAE, Ecole Polytech Fed Lausanne, Lab Technol Composites & Polymeres LTC, CH-1015 Lausanne, Switzerland. email@example.com
ISI Document Delivery No.: 401GS
Times Cited: 3
Cited Reference Count: 27
Jespersen, S. T. Baudry, F. Schmaeh, D. Wakeman, M. D. Michaud, V. Blanchard, P. Norris, R. E. Manson, J. -A. E.
EPFL ; Automotive Composites Consortium
This work was supported by the EPFL and the Automotive Composites Consortium; comprising Daimler Chrysler, Ford Motor Company General Motors and the US department of energy and US Council for Automotive research (USCAR). The authors wish to thank J. Carron, D. May, L. K mpfer and G. Pasche from the EPFL, J. Dahl, G. Smith, M. DeBolt, R. Cooper and D. Houston from Ford Motor Co., S. A. Iobst from General Motors and K. D. Yarborough and R. D. Lomax from Oak Ridge National lab as well as C. Ducret from Owens Corning. The authors would also like to acknowledge the National Composites Center for aid with the processing.
Record created on 2012-06-29, modified on 2016-08-09