Method for making a two-dimensional helical fibre web

Details Method for making a two-dimensional helical fibre web Method for making a two-dimensional helical fibre web

D - Textiles, Paper

04

H

D04H 13/00 (2006.01) B32B 5/26 (2006.01)

Patent

CA 2563512

A transverse fibre web (102) is lapped by being guided reciprocatingly in a substantially radial direction along a travel path between the outer and inner peripheral edges of said web, wherein the transverse web (202) is turned over at each end of the travel thereof and the width thereof is reduced between the outer peripheral edge and the inner peripheral edge. The transverse web is held while being lapped. Substantially mutually parallel yarns or cables (204) are taken up to form a helical longitudinal web (202) with a surface density that decreases from the outer to the inner edge thereof. The transverse and longitudinal helical webs are stacked, continuously fed via a rotary motion in a planar state and assembled to form a two-dimensional helical web (402) that is thereafter discharged.

Une nappe fibreuse transversale (102) est nappée en la guidant suivant une direction sensiblement radiale, le long d'un trajet alternativement dans un sens et dans l'autre entre les bords circonférentiels externe et interne de la nappe, avec retournement de la nappe transversale (202) à chaque extrémité de son trajet, la largeur de la nappe transversale étant diminuée entre le bord circonférentiel externe et le bord circonférentiel interne, et la nappe transversale est maintenue au fur et à mesure de son nappage. Des fils ou câbles (204) sensiblement parallèles entre eux sont appelés pour former une nappe longitudinale hélicoïdale (202) de densité surfacique décroissante entre son bord externe et son bord interne. Les nappes transversale et longitudinale hélicoïdale sont superposées, avancées en continu en rotation à plat, et assemblées pour former une nappe bidimensionnelle hélicoïdale (402) qui est évacuée.

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