Method and apparatus for making fiber composite article

B - Operations – Transporting – 28 – B

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B28B 23/14 (2006.01) B65H 81/00 (2006.01) E04H 12/02 (2006.01)

Patent

CA 2617658

A fiber composite article is wound on a mandrel in a vertical orientation to ensure even tension in the fibers. Composite material is preferably glass fibers and cement. The fibers are applied by an assembly that moves in vertical and horizontal directions and the cement may be applied to the fibers before they are wound. After the fibers and cement are applied to the mandrel, the article is vibrated to allow escape of air and to ensure even coating of the fibers. The apparatus for vibrating the wound article includes a flexible sleeve that surrounds the article and moves vertically to apply a vibrating radial compacting force. The article may then be wound with tape to compress the applied glass fibers and cement prevent the loss of water during curing. A compressible sock is placed on the mandrel between the mandrel and the article for easier removal of the article.

On enroule un article composite en fibre sur un mandrin dans un sens vertical afin d'exercer une tension uniforme sur les fibres. Le matériau composite consiste, de préférence, en des fibres de verre et du ciment. On applique ces fibres au moyen d'un ensemble se déplaçant dans un sens vertical et dans un sens horizontal et on peut appliquer le ciment aux fibres préalablement à leur enroulement. Après l'application des fibres et du ciment au mandrin, on imprime des vibrations à l'article, de manière à pouvoir évacuer l'air et revêtir les fibres de manière uniforme. Le dispositif servant à appliquer des vibrations à l'article enroulé comporte un manchon souple entourant l'article et se déplaçant verticalement afin d'exercer une force vibratoire à compactage radial. On peut ensuite enrouler l'article par une bande adhésive afin de comprimer les fibres de verre et le ciment et d'empêcher la déperdition d'eau pendant le durcissement. On place une gaine compressible sur le mandrin entre le mandrin et l'article, de manière à pouvoir retirer ce dernier plus facilement.

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