Method for making composite parts having at least one curved...

Details Method for making composite parts having at least one curved... Method for making composite parts having at least one curved...

B - Operations, Transporting

29

C

B29C 70/30 (2006.01) B29C 70/10 (2006.01)

Patent

CA 2687830

The invention relates to a method for making a composite part (I) including an assembly of superimposed webs of reinforcement threads imbedded at least partially in a polymer matrix, said part including at least one curved area (5) and the method comprising steps of draping or stacking plies of a composite material, characterised in that, in at least one area adjacent to a curved area, at least one draping or stacking step is carried out with a ply of composite material, that comprises a web, or twisted thread web (2), including at least one twisted reinforcement thread in order to at least compensate the length differences of the extreme paths of the thread on either side of the width as measured in a direction parallel to the surface of the web; the invention also relates to the composite materials thus obtained.

L'invention concerne un procédé de fabrication d'une pièce composite (I) composée d'un ensemble de nappes de fils de renfort superposées inclues, en partie au moins, dans une matrice polymûrigue, ladite pièce présentant au moins une zone courbe (5), dans lequel sont mises en oeuvre des étapes de drapage ou d'empilement de pli en matériau composite caractérisé en ce que, dans au moins une région adjacente à une zone courbe, au moins une étape d'empilement ou de drapage est réalisée avec un pli en matériau composite, comprenant une nappe, nommée nappe de fils torsadés (2), composée d'au moins un fil de renfort torsadé, de façon à au moins compenser les différences de longueur que présentent les trajectoires extrêmes du fil de part et d'autre de sa largeur mesurée parallèlement à la surface de la nappe, ainsi que les pièces composites ainsi obtenus.

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