Method and apparatus for molding composite articles

B - Operations – Transporting – 29 – C

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B29C 45/77 (2006.01) B29C 70/08 (2006.01) B29C 70/44 (2006.01)

Patent

CA 2448717

A method and apparatus for molding composite articles includes a lower frame (14) with a contoured flange, a semi-flexible lower skin (16) and a semi-rigid upper mold half (18). The frame has a contoured flange (24) for drawing a vacuum on a flange (62) of the lower skin. The upper mold half is formed from a skin (20) having a trusswork to make the skin semi-rigid. Pressure sensors (66) are mounted in the mold cavity to sense pressure change of the vacuum with respect to ambient and to control the injection rate of the resin in the cavity.

Procédé et appareil permettant de mouler des articles composites. Ledit appareil comporte un châssis inférieur (14) à bord profilé, une membrane inférieure semi-souple (16) et une moitié de moule supérieure (18) semi-rigide. Le châssis possède un bord profilé (24) destiné à produire un vide sur un bord (62) de la membrane inférieure. La moitié de moule supérieure est constituée d'une membrane (20) ayant une armature servant à rendre ladite membrane semi-rigide. Des capteurs de pression (66) sont montés dans la cavité de moule pour détecter les changements de pression du vide par rapport à la pression ambiante et pour réguler la vitesse d'injection de la résine dans la cavité.

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