Process for producing composite laminate structures and...

B - Operations – Transporting – 32 – B

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B32B 7/06 (2006.01) B32B 7/08 (2006.01)

Patent

CA 2749794

A process for producing resin-impregnated laminate composite structures that comprise a closed-cell core between resin-impregnated fabric layers, and preliminary and composite structures formed by such a process. The process includes stitch-ing a roving in a preliminary structure that includes the core so as to structurally reinforce the core. The roving passes through through-holes in the core and traverses opposite outer surfaces of the preliminary structure. The outer surfaces of the preliminary structure traversed by the roving may be defined by outer surfaces of the core, or the preliminary structure may further include two or more fabric layers on outer surfaces of the core such that the core is between the fabric layers, the roving passes through one or more fabric layers, and at least one of the outer surfaces of the preliminary structure and traversed by the roving is defined by a fabric layer.

L'invention porte sur un procédé pour produire des structures composites stratifiées imprégnées de résine qui comprennent un cur à cellules fermées, entre des couches de tissu imprégnées de résine, et sur des structures préliminaires et composites formées par un tel procédé. Le procédé comprend la piqûre d'une mèche dans une structure préliminaire qui comprend le cur, de façon à renforcer structurellement le cur. La mèche traverse des trous traversants dans le cur et traverse des surfaces externes opposées de la structure préliminaire. Les surfaces externes de la structure préliminaire traversées par la mèche peuvent être définies par des surfaces externes du cur, ou la structure préliminaire peut en outre comprendre au moins deux couches de tissu sur des surfaces externes du cur, de telle sorte que le cur se trouve entre les couches de tissu, que la mèche traverse une ou plusieurs couches de tissu, et qu'au moins l'une des surfaces externes de la structure préliminaire traversées par la mèche est définie par une couche de tissu.

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