Method for producing a concave-shaped in particular u-shaped...

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 70/46 (2006.01) B29C 33/48 (2006.01) B29C 70/44 (2006.01) B29C 70/54 (2006.01)

Patent

CA 2738745

The invention relates to a method fort producing a piece in a composite material with a hollow form and comprising a preform of fibres (50) embedded in a matrix, comprising placing said preform (50) in a first housing (64) defined by a mould (52) in contact with the surface of the piece to be produced outside the hollow form and a counter mould (54) in contact with the surface of the piece for production inside the hollow form, characterised in using a mould (52) in at least two parts (52.1, 52.2) and means (78) for controlling the separation of said at least two parts (52.1, 52.2) which are connected due to the phenomenon of dilatation on polymerisation.

L'objet de l'invention est un procédé de fabrication d'une pièce en matériau composite avec une forme en creux et comportant une préforme de fibres (50) noyée dans une matrice, consistant à placer ladite préforme (50) dans une première enceinte (64) délimitée par un moule (52) en contact avec la surface de la pièce à réaliser à l'extérieur de la forme en creux et un contre-moule (54) en contact avec la surface de la pièce à réaliser à l'intérieur de la forme en creux, caractérisé en ce qu'il consiste à utiliser un moule (52) en au moins deux parties (52.1, 52.2) et des moyens (78) pour maîtriser l'écartement desdites au moins deux parties (52.1, 52.2) qui sont jointives grâce au phénomène de dilatation lors de la phase de polymérisation.

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