Method for making three-dimensional fibrous annular structures

Details Method for making three-dimensional fibrous annular structures Method for making three-dimensional fibrous annular structures

D - Textiles, Paper

04

H

D04H 3/02 (2006.01)

Patent

CA 2626545

The invention concerns a method whereby a first fibrous web formed by substantially unidirectional elements is brought (by device 300) and raised (by shuttle 322) alternately in one direction and in the other between coaxial outer (100) and inner (200) circular crowns, while being maintained at said crowns by picots (102, 202), and a second fibrous web formed by substantially unidirectional elements and deposited (by device 400) in a circumferential direction between said outer and inner crowns, the transverse and circumferential annular webs are bound together by a binding device (500) and are driven in rotation about the axis of the outer and inner crowns by completing three full cycles to obtain a thick annular fibrous structure having layers formed by the transverse web which alternate and are bound to layers formed by the circumferential web.

Une première nappe fibreuse formée d'éléments sensiblement unidirectionnels est amenée (par dispositif 300) et nappée (par navette 322) alternativement dans un sens et dans l'autre entre des couronnes circulaires, externe (100) et interne (200) coaxiales, avec maintien au niveau desdites couronnes par picots (102, 202), et une deuxième nappe fibreuse formée d'éléments sensiblement unidirectionnels est déposée (par dispositif 400) en direction circonférentielle entre ladites couronnes externe et interne, les nappes annulaires transversale et circonférentielle sont liées entre elles par un dispositif de liaison (500) et sont entraînées en rotation autour de l'axe des couronnes externe et interne en réalisant une pluralité de tours complets pour obtenir une structure fibreuse annulaire épaisse ayant des couches formées par la nappe transversale qui alternent et sont liées avec des couches formées par la nappe circonférentielle.

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