An installation for making needled fiber preforms for use in...

D - Textiles – Paper – 04 – H

Patent

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D04H 1/46 (2006.01) D04H 18/00 (2006.01)

Patent

CA 2056769

The installation comprises support tooling having a shape that corresponds to that of the preform to be made and on which superposed layers of a two-dimensional fiber fabric can be draped; a needling head comprising a group of needles, a device for driving the needles lengthwise with reciprocating translation motion, and a bearing plate provided with perforations to pass the needles and suitable for being pressed against a layer draped over the support tooling; an arm carrying the needling head and possessing a plurality of degrees of freedom; and a control device for automatically controlling the displacement of the arm to move the needling head within the range of the arm along predetermined trajectories and with predetermined orientations.

L'installation comprend un outillage de support ayant une forme correspondant à celle de la préforme à fabriquer et sur laquelle il est possible de draper des couches superposées d'un tissu de fibres à deux dimensions. L'outillage de support comprend également : une tête d'aiguilletage incluant un groupe d'aiguilles; un dispositif pour entraîner les aiguilles dans le sens de la longueur au moyen d'un mouvement alternatif de translation; une plaque d'appui qui est dotée de perforations par lesquelles les aiguilles passent et qui est convenable pour être pressée contre une couche drapée sur l'outillage de support; un bras portant la tête d'aiguilletage et présentant plusieurs degrés de liberté; et un dispositif de commande permettant de commander automatiquement le déplacement du bras pour déplacer la tête d'aiguilletage à l'intérieur du rayon du bras, le long de trajectoires prédéterminées et dans des sens prédéterminés.

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