Process for producing a panel using a composite material...

Details Process for producing a panel using a composite material... Process for producing a panel using a composite material...

B - Operations, Transporting

29

C

B29C 70/02 (2006.01) B29D 99/00 (2010.01) B29C 37/00 (2006.01) B29C 70/08 (2006.01) B29C 70/34 (2006.01) B29C 70/54 (2006.01)

Patent

CA 2346311

The object of the invention is a process for the production of a panel (7) of composite material with stiffening strips (3), in which a mold (1) is draped with at least one first ply (2) of fibers pre- impregnated with resin, there is emplaced at desired positions on said ply (2) at least one stiffening strip (3), the stiffening strip (3) as well as at least a portion of the remaining surface of said first ply (2) is covered with at least one second ply (4) of fibers pre-impregnated with resin, then a bladder (6) is placed to cover the above elements, a suitable vacuum is established in the space between the mold (1) and the bladder (6), the assembly is then placed in an autoclave to subject it to a pre-established polymerization cycle for the resin, at temperatures and pressures suitable for said resin, and finally the panel is demolded, characterized in that before said emplacement of the stiffening strip (3) and/or of the second ply (4), there is interposed at least one layer, film or the like (5) of a non-adherent material between at least one portion of the surface of the stiffening strip (3) and one and/or the other of said plies (2, 4).

- L'objet de l'invention est un procédé de fabrication d'un panneau (7) en matériau composite à bandes raidisseurs (3), dans lequel on drape dans un moule (1) au moins un premier pli (2) de fibres préimprégnées de résine, on met en place aux endroits désirés sur ledit pli (2) au moins une bande raidisseur (3), on recouvre la bande raidisseur (3) ainsi qu'une partie au moins de la surface restante dudit premier pli (2), d'au moins un second pli (4) de fibres préimprégnées de résine, puis on met en place une vessie (6) en recouvrement des éléments ci-dessus, on établit un vide approprié dans l'espace entre moule (1) et vessie (6), on dispose ensuite l'ensemble dans un autoclave pour y subir un cycle de polymérisation préétabli de la résine, à pressions et températures appropriées à ladite résine et enfin, on démoule le panneau, caractérisé en ce que préalablement auxdites mises en place de la bande raidisseur (3) et/ou du second pli (4), on interpose au moins une couche, film ou analogue (5) d'un matériau non adhérent entre au moins une partie de la surface de la bande raidisseur (3) et l'un et/ou l'autre desdits plis (2,4).

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