Method of molding a helicopter rotor blade

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 70/00 (2006.01) B29D 99/00 (2010.01) B29C 70/34 (2006.01) B29C 70/44 (2006.01) B32B 17/00 (2006.01) B32B 25/20 (2006.01)

Patent

CA 2421701

A method of molding a blade for a helicopter rotor, including the steps of making a bag matrix of heat- expandable material; inserting a rigid mandrel inside the matrix; covering the matrix with a number of layers of composite material of predetermined type; placing the assembly so formed inside a chamber of a mold bounded by a molding surface; and bringing the assembly to a sufficient temperature to expand the matrix and polymerize the layers of composite material compacted between the expanded matrix and the molding surface of the mold.

Une méthode de moulage d'une pale pour un rotor d'hélicoptère comprenant les étapes pour fabriquer une matrice au sac dans une matière extensible à la chaleur, l'insertion d'un mandrin rigide dans la matrice, le recouvrement de la matrice d'un certain nombre de couches d'un matériau composite d'un type prédéterminé, la mise en place de l'assemblage ainsi formé à l'intérieur de la chambre d'un moule délimité par une surface moulante et le chauffage à une température suffisante de l'assemblage pour provoquer l'expansion de la matrice et la polymérisation des couches de matériau composite compacté entre la matrice expansée et la surface moulante du moule.

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