GFK-CureWave – Development of a process for microwave curing of fiberglass composite components
Development of the microwave-transparent material and investigation of transmission gradients in a microwave system
Project Partners
IBB GmbH, Fichtner & Schicht GmbH
Duration
01.04.2021 – 30.09.2023
Funding authority
BMWi ZIM
Motivation
The aim of the project is to develop a microwave-based curing process for resin transfer molding (RTM) with GFRP components. In contrast to conventional ovens, microwave technology heats volumetrically and only the process material itself, but not the ambient air, so that a shorter curing time is achieved without damaging the component. This process requires the development of a special tool which, in addition to an integrated cooling system and thermal insulation, must have microwave transparency in order to avoid energy losses. To optimize the process, investigations into shielding and absorption of the microwave radiation are carried out in order to achieve uniform heating of the component.
Method
Investigations on the suitability of different tool materials for microwave curing are carried out at the LCC. The influencing parameters of the microwave radiation are examined and optimal process parameters are defined, which enable a homogeneous heating of the component and meet the requirements for cycle times. With the help of absorbers or shields, a tool concept is developed, based on which demonstrator components are manufactured.
Acknowledgement
The Chair would like to thank the Federal Ministry for Economic Affairs and Climate Action for funding the "GFK-CureWave" project (funding code: KK5135805SN0).
Contact Persons
Maximilian Steinhardt, M.Sc.; Dr.-Ing. Swen Zaremba