B - Operations – Transporting – 29 – C

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B29C 43/36 (2006.01) B29C 31/00 (2006.01) B29C 43/34 (2006.01) B29C 70/46 (2006.01) B29C 70/68 (2006.01)

Patent

CA 2685560

Compression moulding method for composites consisting in forming a dough (2) under pressure consisting of an amalgam of non-woven fibres randomly mixed and associated, in a defined proportion, with a thermosetting or thermoplastic material. The preparation of the dough (2) consists in mixing said fibres and said thermosetting or thermoplastic material, in a vacuum, while said forming operation is carried out by introducing the dough (2) into a mould (1) designed and dimensioned to withstand high pressures, having a moulding cavity (11) in the form of the part (P) to be produced and provided with at least one well (12) configured so as to accommodate, tightly, a plunger piston (13; 36; 48), which, by sliding, can pressurize (F) the dough (2) in the cavity (11), and thereby form the dough in the mould (1).

Procédé de moulage sous pression de matériaux composites consistant à mettre en forme sous pression un pâton (2) constitué d un amalgame de fibres non tissées, mélangées de manière aléatoire et associées, dans une proportion déterminée, à une matière thermodurcissable ou thermoplastique. La préparation du pâton (2) consiste à mélanger lesdites fibres et ladite matière thermodurcissable ou thermoplastique, sous vide d'air, tandis que ladite mise en forme est obtenue par introduction du pâton (2) dans un moule (1) conçu et dimensionné pour résister aux fortes pressions, présentant une cavitéde moulage (11) à la forme de la pièce (P) à réaliser et muni d'au moins un puits (12) configuré pour recevoir, de manière ajustée, un piston plongeur (13; 36; 48) dont le coulissement est apte à réaliser la mise en pression (F) du pâton (2) dans la cavité (11), et donc la mise en forme de celui-ci dans le moule (1).

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