Former head with adjustable needle rollers

D - Textiles – Paper – 04 – H

Patent

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Details

D04H 1/70 (2006.01) B27N 3/04 (2006.01) B27N 3/14 (2006.01) D04H 3/03 (2006.01)

Patent

CA 2459414

The purpose of the invention is to provide a former head allowingfor processing long fibres while achieving a carding action and a fibre distribution fulfilling high quality standards, and providing the possibility of adjustments during operation. The former head (2) contains at least one needle roller (6), where a mixture of air and fibres are injected above the horizontal plane in which the centre axis of the needle roller is situated and directly onto the periphery (22) of the needle roller, and which is furthermore arranged with a number of adjustable needle rollers (8,10). With a former head (2) where fibres and air are injected in a controlled and new way, there is achieved possibility of processing longer fibres and maintain a high distribution quality. By using a number of adjustable needle rollers (8,10), there is achieved the advantage that the fibre material go through a carding process during the distribution. This carding process is effected by the action of needles (36) by injection onto the periphery (22) of the stationary needle roller as well as by the subsequent contact with the adjustable needle rollers (8,10).

L'invention concerne une tête de formation qui permet de traiter des fibres longues tout en réalisant une action de cardage et une distribution de fibres répondant à des normes de haute qualité, et qui offre la possibilité de procéder à des réglages pendant son fonctionnement. La tête de formation (2) comporte au moins une aiguille de roulement (6), dans laquelle on injecte un mélange d'air et de fibres au-dessus du plan horizontal où se situe l'axe central de l'aiguille de roulement, et directement sur la périphérie (22) de ladite aiguille, et qui, en outre, est équipée de plusieurs aiguilles de roulement (8, 10) réglables. Une tête de formation (2), dans laquelle des fibres et de l'air sont injectés d'une manière à la fois nouvelle et contrôlée, permet de traiter des fibres longues et de maintenir une distribution de haute qualité. L'intérêt de l'utilisation d'un certain nombres d'aiguilles de roulement (8, 10) réglables réside dans le fait que la matière fibreuse passe par un processus de cardage lors de la distribution. Ledit processus est réalisé par l'action des aiguilles (36) par injection sur la périphérie (22) de l'aiguille de roulement fixe et, par la suite, par contact avec les aiguilles de roulement (8, 10) réglables.

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