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Integral blow moulding for cycle time reduction of CFR-TP aluminium contour joint processing

Integral-Blasformen zur Zykluszeitverkürzung der Fertigung von CFR-TP Aluminium Konturverbindung
: Barfuß, Daniel; Würfel, Veit; Grützner, Raik; Gude, Maik; Müller, Roland


Fratini, Livan (Ed.) ; European Scientific Association for Material Forming:
21st International ESAFORM Conference on Material Forming, ESAFORM 2018. Proceedings : 23-25 April 2018, Palermo, Italy
Melville/NY: AIP Publishing, 2018 (AIP Conference Proceedings 1960)
ISBN: 978-0-7354-1663-5
Art. 050003
International Conference on Material Forming (ESAFORM) <21, 2018, Palermo>
Conference Paper
Fraunhofer IWU ()

Integral blow moulding (IBM) as a joining technology of carbon fibre reinforced thermoplastic (CFR-TP) hollow profiles with metallic load introduction elements enables significant cycle time reduction by shortening of the process chain. As the composite part is joined to the metallic part during its consolidation process subsequent joining steps are omitted. In combination with a multi-scale structured load introduction element its form closure function enables to pass very high loads and is capable to achieve high degrees of material utilization. This paper first shows the process set-up utilizing thermoplastic tape braided preforms and two-staged press and internal hydro formed load introduction elements. Second focuses on heating technologies and process optimization. Aiming at cycle time reduction convection and induction heating in regard to the resulting product quality is inspected by photo micrographs and computer tomographic scans. Concluding remarks give final recommendations for the process design in regard to the structural design.