Hc. Ludwig et al., A QUANTITATIVE COMPARISON OF MORPHOLOGY AND FIBER ORIENTATION IN PUSH-PULL PROCESSED AND CONVENTIONAL INJECTION-MOLDED PARTS, Composites science and technology, 53(2), 1995, pp. 235-239
Push-pull processing is a new processing technology for thermoplastic
materials. The mould has two gates which are connected to two synchron
ised injection units. The melt is moved several times through the moul
d during the packing phase. This modified filling process influences t
he orientation of fibres and matrix in a part significantly: the core
layer of short-fibre-reinforced material is completely different from
a conventional injection moulded part. The influence on morphology, fi
bre orientation and properties is investigated and discussed.