Optimization of the manufacturing of thick-walled fiber plastic components through 3D-preforming with reversible resin flow channels

The demand for high-strength, lightweight materials has driven advancements in composite manufacturing, especially in applications like aerospace, automotive, and energy. This study addresses the challenges in impregnating thick-wall composites through the development of a novel textile integration technique. Traditional liquid composite molding (LCM) processes face limitations in thick composites due to slow infiltration, void formation, and compromised mechanical integrity. Our work introduces an innovative 3D weft-knitted preform with integrated, reversible flow channels (RFC), optimizing resin permeability while maintaining fiber volume. The proposed method reduces cycle times and improves the mechanical performance of glass fiber-reinforced polymer (GFRP) composites, presenting a promising alternative to conventional flow aids.