Method of producing molded article of fiber-reinforced...

B - Operations – Transporting – 29 – C

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B29C 70/34 (2006.01)

Patent

CA 2495748

The invention relates a method of stably and highly efficiently producing a three-dimensional molded article of a fiber-reinforced composite material having a three-dimensional shape, uniform quality, and free from wrinkles by press molding a plurality of prepregs cut out in a predetermined shape and also to a molded article. In the production method, at least one set of a partially separated flap (31c to 33c) and a residual portion (31d to 33d) are formed for each prepreg by forming a plurality of notches or cutouts for each cut-out prepreg (31 to 33). The respective prepregs are laminating at predetermined portions of a press die (10) using the partially separated flaps (31c to 33c) of the respective prepregs as positioning parts, and the partially separated flaps (31c to 33c) of the prepregs pressed to a three-dimensional shape. Next, end edge parts of the residual portions (31d to 33d) are laid over end edge parts of the partially separated flaps (31c to 33c) and pressed to obtain a molded article of a fiber-reinforced composite material having a desired three-dimensional shape as a whole. Employment of an epoxy resin for a matrix resin composition to be used for the prepreg further improves the production efficiency.

On forme des incisions ou des découpes (31b-33b) dans des objets pré-imprégnés individuels détourés (31-33) et au moins un ensemble d'un rebord partiellement séparé (31c, 32c, 33c) et une partie résiduelle (31d, 32d, 33d) est formée dans chaque objet pré-imprégné. Les rebords partiellement séparés (31c-33c) des objets pré-imprégnés sont superposés sur des parties prédéterminées de matrice de presse (10) sous forme de rebords de positionnement. Une fois que les rebords partiellement séparés (31c-33c) des objets pré-imprégnés sont pressés on obtient une forme tridimensionnelle souhaitée. Ensuite, les parties de bord terminales des parties résiduelles (31d-33d) sont superposées sur les parties de bord d'extrémité des rebords partiellement séparés (31c-33c) et sont ultérieurement pressées, de manière qu'un produit formé d'un matériau composite renforcé par des fibres ayant une forme tridimensionnelle souhaitée soit obtenue. Ainsi, un produit formé d'un matériau composite renforcé par des fibres est produit de manière stable et très efficace sans pli.

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