New Technique for Impregnating Rovings with Highly Viscous Melts

The impregnation of rovings with highly viscous melts is still a challenging task. A new technique developed by German Aerospace Center is shown, to achieve high impregnation quality within small installation space. This technology is based on the introduction of high frequency sound waves in a thermoplastic melt, which encloses a fiber roving. Possible application scenarios range from the production of continuous fiber-reinforced semi-finished products to the integration in a 3D-printing head.