Method and apparatus for manufacturing composite parts

B - Operations – Transporting – 29 – C

Patent

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B29C 70/32 (2006.01) B29C 70/44 (2006.01)

Patent

CA 2753735

A method of manufacturing two or more composite parts, the method comprising: assembling the composite parts on a mandrel by laying a series of layers of bands of composite material onto the mandrel with a placement machine,- rotating the mandrel as the bands are laid onto the mandrel; attaching two or more debulk frames (10, 11) to the mandrel between opposed edges of the composite parts after the composite parts have been assembled; wrapping the mandrel, debulk frames (10, 11) and composite parts in a debulk bag; heating the composite parts,- forming a vacuum between the mandrel and the debulk bag so that the debulk bag is sucked into voids between the debulk frames and the heated composite parts and progressively presses against the heated composite parts whereby excess material is squeezed by the debulk bag towards their opposed edges; and removing the debulk bag and the composite parts from the mandrel.

La présente invention porte sur un procédé de fabrication de deux pièces composites ou plus, comprenant les étapes suivantes : assemblage des pièces composites sur un mandrin, en plaçant une série de couches de bandes de matériau composite sur le mandrin à l'aide d'une machine de placement; mise en rotation du mandrin une fois les bandes placées sur ledit mandrin; fixation de deux structures de réduction du volume ou plus au mandrin, entre les bords opposés des pièces composites, après assemblage des pièces composites; emballage du mandrin, des structures de réduction du volume et des pièces composites dans un sac de réduction du volume; chauffage des pièces composites; formation d'un vide entre le mandrin et le sac de réduction du volume, de façon à ce que ledit sac soit aspiré dans les vides entre les structures de réduction du volume et les pièces composites chauffées et soit progressivement pressé contre lesdites pièces composites chauffées, le matériau en excès étant alors serré par le sac de réduction du volume en direction des bords opposés desdites pièces; et retrait du sac de réduction du volume et des pièces composites hors du mandrin.

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