Automatisierte Preform-Fertigung

Bogenschütz, Marco; Möllers, Hendrik; Stüven, Jan-Lukas; Schmidt, Carsten

doi:10.37544/0042-1766-2023-05-51

VDI-Z

2023

DOI: 10.37544/0042-1766-2023-05-51

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Automatisierte Preform-Fertigung

Marco Bogenschütz¹,

Hendrik Möllers²,

Jan-Lukas Stüven³

et al.

Abstract: Bezogen auf ihre Dichte, verfügen Faserverbundwerkstoffe über hervorragende mechanische Eigenschaften. Um die Anwendung wettbewerbsfähig und wirtschaftlich zu gestalten, bedarf es effizienter und automatisierter Fertigungstechnologien. Dann können die Vorteile auch in kostensensitiven Branchen genutzt werden.

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Influence of Epoxy Spray Binder on Infusion and Cure in Liquid Composite Molding Processes

Möllers,

Schmidt,

Meiners

2023

Appl Compos Mater

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Binders are known to influence the different steps in liquid composite molding process chains. Most reseach focuses on powder binder and veils. Spray binders are rarely studied. Therefore, the effect of an epoxy spray binder on the infusion and cure steps of liquid composite molding processes is studied in this paper. Permeability measurements, solubility tests and measurements of glass transition temperature, resin cure time and resin viscosity show a complex interaction between binder and resin depending on the process conditions. The binder mostly increased the permeability of the tested preforms. This effect increases with increasing binder loading. At low fiber volume fractions the binder had a positive effect on preform permeability, most likely by to delaying the closure of macro flow channels or textile inhomogeneity. The binder did not dissolve in the resin until temperatures of around 120 °C, while remaining as a separate phase at 22 °C, 40 and 80 °C. This has to be considered when defining the cure profile of the resin, as the binder is expected to participate in the cure reaction. The glass transition temperature remained unchanged for the binder-resin combination used. An increase in viscosity by a factor of 1.5-2 was observed when the binder was dissolved in the resin. Samples with dissolved binder cured slightly faster than pure resin. The experimental results were theoretically transferred to real infusion processes.

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Influence of Epoxy Spray Binder on Infusion and Cure in Liquid Composite Molding Processes

Möllers,

Schmidt,

Meiners

2023

Appl Compos Mater

View full text Add to dashboard Cite

show abstract

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Automatisierte Preform-Fertigung

Cited by 1 publication

References 0 publications

Influence of Epoxy Spray Binder on Infusion and Cure in Liquid Composite Molding Processes

Influence of Epoxy Spray Binder on Infusion and Cure in Liquid Composite Molding Processes

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