Fiber reinforced composite cores and panels

B - Operations – Transporting – 32 – B

Patent

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Details

B32B 5/14 (2006.01) B32B 5/18 (2006.01) E04C 2/296 (2006.01)

Patent

CA 2395888

A fiber reinforced core (31) is formed from plastics foam material having elongated porous and fibrous webs and/or rovings (34) extending through the foam material. The rovings (34) may extend angularly through the webs, and strips of the foam material (33) may be helically wound with layers of crossing rovings (53) to form the webs. Porous and fibrous skins (32) for the core may be formed by the wound rovings (53) and by parallel continuous rovings (34), and the foam strips (33) may be formed with internal grooves (39) adjacent the webs (34, 53) and connected by a feeder channel (40) for infusing a hardenable adhesive resin into the grooves (39) and outwardly through the webs to the skins (32) with differential pressure on the resin.

Selon l'invention, on forme une âme (31) renforcée par des fibres à partir d'une matière plastique alvéolaire dans laquelle s'étendent des bandes continues et/ou des stratifils (34) poreux et fibreux. Lesdits stratifils (34) peuvent s'étendre à travers les bandes continues de manière angulaire, et les bandes de matière alvéolaire (33) peuvent être enroulées de façon hélicoïdale avec des couches de stratifils transversaux (53) pour former les bandes continues. Les revêtements (32) poreux et fibreux de l'âme peuvent être formés par les stratifils enroulés (53) et par des stratifils (34) continus parallèles, alors que les bandes (33) de matière alvéolaire peuvent être formées avec des rainures (39) internes adjacentes aux bandes continues (34, 53) et reliées par un canal (40) d'alimentation destiné à permettre la diffusion d'une résine adhésive durcissable dans lesdites rainures (39) et vers l'extérieur des bandes, en direction des revêtements (32), sous l'effet de l'application d'une pression différentielle sur la résine.

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