Deringer, Tim
Methodik zur integrativen Kombination duroplastischer Formmassen und Prepregs im Spritzgießverfahren
Tim Deringer
Due to their advantageous weight-related properties and the specific characteristics of their matrix,
such as temperature resistance or emergency running properties, pre-impregnated sheet-like semifinished
products based on continuous fiber-reinforced thermosets offer great potential for lightweight
construction in demanding application areas such as aviation. Due to the increasing need for
simultaneous functionalization or increase in geometric complexity of such components, integrative
manufacturing processes in particular are seen as the key to efficient and economical production.
Integrative manufacturing combines different materials with differentiated specific properties in a single
process step and demolds them as a single component or hybrid component. However, the major
weak point of such a hybrid component is the interface between the combined materials, which
means that the success of an integrative thermoset manufacturing process depends to a large extent
on the realization of a load-bearing interface without weakening the material properties of the individual
components.
In this work, a novel method for the integrative combination of thermoset molding compounds and
thermoset prepregs in thermoset injection molding in the uncrosslinked state is demonstrated. In
addition to the characteristic interface formation, the relationships between dominant process influences
and resulting component properties are identified and underlying causes are understood. For
this purpose, selected material and process parameters are varied, analyzed and linked in laboratory
and processing tests. In addition, dominant adhesion mechanisms and associated characteristic failure
behaviors are evaluated and analytically described. Based on the results, guidelines for a stable
process window and for the component design of the novel integrative process are also derived.
These form a far-reaching contribution for a potential further development of the process towards
series production.
Pages: 145
ISBN: –