Abstract
Abstract A right angle tool is employed for the experimental study of the stamp forming process of continuous fibre-reinforced thermoplastic laminates. In particular, a carbon fibre/polypropylene system is used. Unidirectional and quasi-isotropic preconsolidated laminates are heated by contact heating in an external heater above the melting temperature of the polymer matrix and are then stamp formed in a cold matched metal tool. Typical cycle times (including preheating time of the preconsolidated laminates) are about 2 min. Useful processing in conditions, such as stamping temperature, stamping time, stamping velocity and pressure required for stamp forming of this composite are determined. Fibre movement at bend range were qualitatively investigated with Cu tracer wires embedded in preconsolidated laminate samples. A process window for stamping is generated, which describes the correlations between processing parameters and final part thickness and final part angle respectively.
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