Method and apparatus for winding up coreless and soft-core...

B - Operations – Transporting – 65 – H

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Details

B65H 18/16 (2006.01) B29C 59/04 (2006.01) B65H 20/24 (2006.01) B65H 23/04 (2006.01)

Patent

CA 2567974

A method and an apparatus for winding coreless and soft-core rolls (11), of film materials (10). The film (10) is made to advance, at differentiate speeds (S1, S2), between a first and a second drawing unit (12, 21) making the film (10) to perform a floating loop (19). The film (10) is fed in a controlled way, making it adhere to a grooved embossing drum (22) by an air jet (29) to emboss cross corrugations in the film (10) while it is being wound up; the corrugations of the film (10) traps air and prevents the implosion of the roll (11). A programmable electronic unit (32), controls the drawing units (12, 21) in relation to control signals (E1, E2) related to the feeding and winding up speeds (S1, S2) of the film (10), and in relation to a control signal supplied by a sensing device (28) for detecting the position of the floating loop (19).

La présente invention a trait à un procédé et un appareil pour l'enroulement de rouleaux sans mandrin ou à mandrin souple (11) de matériaux sous forme de film (10). Le film (10) est déplacé vers l'avant, à des vitesses différentes (S1, S2) entre une première et une deuxième unités d'étirage (12, 21) entraînant la formation par le film (10) d'une boucle flottante (19). Le film (10) est alimenté de manière contrôlée, le faisant adhérer à un tambour de gaufrage rainuré (22) grâce à un jet d'air (29) pour le gaufrage d'ondulation croisées dans le film lors de son enroulement; les ondulations du film (10) piège l'air et empêche l'implosion du rouleau (11). Une unité électronique programmable (32) commande les unités d'étirage (12, 21) en fonction de signaux de commande (E1, E2) associés aux vitesses d'alimentation et d'enroulement (S1, S2) du film (10), et en fonction d'un signal de commande fourni par un capteur (28) pour la détection de la position de la boucle flottante (19).

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