Method for making a panel including at least one cellular...

B - Operations – Transporting – 32 – B

Patent

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Details

B32B 3/12 (2006.01) E04C 2/36 (2006.01)

Patent

CA 2709906

The invention relates to a method for making a sandwich panel, that comprises baking a stacked structure (16) including: a first cellular body (2); a film (12) pre-impregnated with a first resin having a polymerisation temperature T1; and a first stack (18) of webs of fibres pre-impregnated with a second resin having a polymerisation temperature T2 higher than T1, the film being arranged between the first stack and the body. The baking includes a first phase for producing, from the film (12), a rigid barrier that is sealed relative to the second resin by polymerisation of the first resin, followed by a second phase for producing the skin from the stack (18) by polymerisation of the second resin.

L' invention concerne un procédé de fabrication d'un panneau sandwich, comprenant la cuisson d'une structure empilée (16) pourvue : - d'un corps en nid-d'abeilles (2); - d'un film (12) pré-imprégné d'une première résine présentant une température de polymérisation T1; et - d'un premier empilement (18) de plis de fibres pré- imprégnées d'une seconde résine présentant une température de polymérisation T2 supérieure à T1, le film étant agencé entre le premier empilement et le corps. La cuisson comporte une première phase visant à réaliser, à partir du film (12), une barrière rigide d'étanchéité vis-à-vis de la seconde résine, par polymérisation de la première résine, suivie d'une seconde phase visant à réaliser, à partir de l'empilement (18), la peau, par polymérisation de la seconde résine.

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