B - Operations – Transporting – 26 – D
Patent
B - Operations, Transporting
26
D
B26D 1/36 (2006.01) B26D 5/20 (2006.01) B65H 35/00 (2006.01) B65H 35/08 (2006.01) C03B 37/16 (2006.01) D01G 1/04 (2006.01)
Patent
CA 2195399
An apparatus for cutting fibrous reinforcement material in relationship with an ejector nozzle. The apparatus comprises at least two feeding rollers and a rotary cutter which is provided with a substantially cylindric mantle surface with attachments for a number of knife means. These cooperate with a support roller with an elastic surface layer for forming a thread nip. The mantle surface of the cutter is provided with slot-shaped recesses for the fibre thread which recesses extend peripherally along the mantle surface between the knife means. The recesses enable the thread to be fed forward by means of the feeding rollers at a feeding rate which deviates from the speed of the cutter, for adaption of the cutting length of the fibre thread.
Dispositif servant à couper des fibres de renforcement (10) et coopérant avec une buse d'éjection (19). Ce dispositif comprend au moins deux rouleaux d'alimentation (11, 12) et un ensemble coupant rotatif (16) pourvu d'une surface sensiblement cylindrique comportant des points de fixation pour plusieurs lames (22). Ces éléments coopèrent avec un rouleau de support (17) pourvu d'une couche superficielle élastique (17a), afin de constituer un point de contact avec la fibre. La surface de l'ensemble coupant (16) comporte des évidements en forme de fentes (24) dans lesquels passe la fibre (10) et qui s'étendent sur la circonférence de ladite surface, dans le sens de sa longueur, entre les lames (22). Ces évidements permettent de faire avancer la fibre par l'intermédiaire des rouleaux d'alimentation (11, 12) à une cadence différente de la vitesse de l'ensemble coupant (16), afin d'adapter la longueur de coupe de ladite fibre.
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