Fibre reinforced composite structures and method of manufacture

B - Operations – Transporting – 29 – C

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B29C 70/88 (2006.01) B29C 70/48 (2006.01)

Patent

CA 2739477

In the formation of a fibre reinforced composite material component (10) produced by a resin transfer infusion process such as to have an electrically conductive surface layer (11) for lightning strike protection wherein the component is to be drilled and countersunk to receive an electrically conductive fastener (12), a localised part (11a) of the electrically conductive mesh is deformed so as to be relocated in the countersunk recess thus to ensure electrical contact with the fastener (12) when inserted and to eliminate any gap (x) between the mesh and the fastener thus determining the electrical conductive integrity of the mesh to avoid arcing in the event of lightning strike attachment.

Selon la présente invention, dans la formation dun composant en matériau composite renforcé par des fibres (10) obtenu par un procédé dinfusion par transfert de résine de manière à obtenir une couche superficielle électriquement conductrice (11) destinée à protéger de la foudre, le composant doit être percé et fraisé afin de recevoir un élément de fixation électriquement conducteur (12). Une partie localisée (11a) de la maille électriquement conductrice est déformée afin dêtre déplacée et installée dans lévidement fraisé pour garantir un contact électrique avec lélément de fixation (12) lorsquelle est insérée, et éliminer tout espace (x) entre la maille et lélément de fixation, ce qui détermine ainsi lintégrité de la maille électriquement conductrice et évite la formation dun arc en cas de foudre.

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