Novel tooling for direct melt impregnation of textile with variotherm injection moulding: Methodology and proof of concept

Author:

Werlen Vincent12ORCID,Rytka Christian1,Wegmann Stephanie1,Philipp Halime1,Khalaf Yara1,Michaud Véronique2,Brauner Christian1ORCID,Dransfeld Clemens3ORCID

Affiliation:

1. Institute of Polymer Engineering, FHNW, Windisch, Switzerland

2. Laboratory for Processing of Advanced Composites, EPFL, Lausanne, Switzerland

3. Aerospace Manufacturing Technologies, TU Delft, Delft, Netherlands

Abstract

Thermoplastic compression resin transfer moulding coupled with injection moulding is an appealing process for the production of thermoplastic composites. However, its implementation at an industrial scale remains challenging as variotherm injection moulding could prevent solid skin formation in the parting line, making cavity sealing difficult. In this study, a tool for thermoplastic compression resin transfer moulding and the related methods and process parameters for an implementation at an industrial scale are presented. The validity of the concept is proved by producing and characterizing composite plates with elevated fibre volume fractions and advantageous mechanical properties at a range of production temperatures within a cycle time not exceeding 20 min. The best mechanical properties were obtained at a production temperature of 270°C with a bending strength of 477 MPa, a flexural modulus measured at 25.7 GPa and a fibre volume content of 67%.

Funder

Swiss Competence Center for Energy Research - Supply of Electricity

Publisher

SAGE Publications

Subject

Materials Chemistry,Mechanical Engineering,Mechanics of Materials,Ceramics and Composites

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