Method for producing ring-shaped fibrous structures, in...

Details Method for producing ring-shaped fibrous structures, in... Method for producing ring-shaped fibrous structures, in...

D - Textiles, Paper

04

H

D04H 3/04 (2006.01) B29C 70/22 (2006.01) B29C 70/54 (2006.01) D04H 13/00 (2006.01) F16D 69/02 (2006.01) D04H 3/08 (2006.01)

Patent

CA 2285375

To make an annular fiber structure, a strip-shaped fabric (50) is used which is made up of two superposed unidirectional sheets, with the directions of the sheets forming opposite angles relative to the longitudinal direction of the strip, the two sheets being bonded together so as to form deformable elementary meshes, the fabric being wound while being deformed so as to transform it into a flat helix, the elementary meshes deforming in such a manner that variation in mass per unit area between the inside and outside diameters of the turns remains small, and the flat turns are pressed against one another.

Pour élaborer une structure fibreuse annulaire on utilise une texture en forme de bande (50) formée de deux nappes unidirectionnelles superposées dont les directions font des angles opposés par rapport à la direction longitudinale de la bande, les deux nappes étant liées entre elles de manière à former des mailles élémentaires déformables, on enroule la texture en la déformant pour la transformer en hélice à plat, les mailles élémentaires se déformant de sorte que la variation de masse surfacique entre les diamètres intérieur et extérieur des spires reste limitée, et on applique les spires à plat les unes contre les autres.

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