Edge Race-Tracking during Film-Sealed Compression Resin Transfer Molding

Edge race-tracking is a frequently reported issue during resin transfer molding. It caused by highly permeable channels and areas between the preform edge cavity, which can significantly change impregnation pattern. To date, information scarce on effect of in compression molding (CRTM). close this gap, laboratory equipment was developed to study CRTM via flow visualization experiments. The thereby encapsulated thin thermoplastic films sealing its impregnation. Film-sealed (FS-CRTM) experiments preforms with small geometrical aspect ratio showed fast filling injection gap subsequent through-thickness Creating an channel, additional lateral in-plane from channel towards center observed, initiating soon after started spatial connection channel. diminish race-tracking, passive control strategy implemented split design upper tool spatially isolate pre-compact edge. A delayed reduced showing that increases process robustness FS-CRTM regarding effects.