Winding-up process and machine for winding up webs of paper...

B - Operations – Transporting – 65 – H

Patent

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Details

B65H 18/26 (2006.01) B65H 18/16 (2006.01) B65H 18/20 (2006.01) B65H 27/00 (2006.01) B65H 75/18 (2006.01) D01G 27/02 (2006.01)

Patent

CA 2264804

The present invention relates to a process and a machine for winding up a web (1) of paper or cardboard onto winding sleeves (14) in which a) during the winding-up process, the winding-up roll (3) is pressed with an adjustable contact pressure against a driven support roller (4) that has an outer layer (6) the volume of which can be can be compressed, said layer being at least 5 mm thick, of a cellular plastic material with a plurality of uniformly distributed pores and a modulus of compression it of less than 10 MPa; b) the web (1) that is fed to the winding-up roll (3) wraps around the support roller (4) ahead of the nip (7) between the winding-up roll (3) and the supporting roll (4) in an area of the periphery of the roller; c) depending on the construction of the outer layer 6 on the support roller, i.e., on its configuration and material characteristics, the contact force of a winding-up roll on the support roller is so adjusted that a nip 7 is formed, said nip being of a width b as measured in the direction of the roll periphery as follows: - at least 5 mm at an end production speed of more than 1000 m/min; - at least 15 mm at an end production speed of more than 2000 m/min; - at least 40 mm at an end production speed of more than 3000 m/min; - at least 70 mm at an end production speed of more than 4000 m/min; the web (1) that runs out of the nip (7) is drawn off by means of an additional peripheral or central drive system (13) with a force of at least 1 N/cm web width

L'invention concerne un procédé et une machine pour l'enroulement de bandes de papier ou de carton (1) sur des mandrins (14). Dans ce procédé, a) les rouleaux d'enroulement (3) sont appuyés, lors de l'enroulement, avec une pression d'appui réglable contre un cylindre de support (4) entraîné, lequel comporte une couche extérieure (6) compressible en volume, d'une épaisseur d'au moins 5 mm, et constituée d'un matériau plastique alvéolaire doté d'une pluralité de pores répartis uniformément et présentant un module de compression kappa inférieur à 10 MPa, b) la bande (1) amenée à un rouleau d'enroulement (3) s'enroule sur le cylindre de support (4) dans une région périphérique de celui-ci, avant la ligne de contact (7) entre le rouleau d'enroulement (3) et le cylindre de s upport (4), c) la pression d'appui d'un rouleau d'enroulement (3) sur le cylindre de support (4) est réglée en fonction de la structure de la couche extérieure (6) de sorte qu'il se forme une ligne de contact (7) présentant une largeur minimale b dépendant de la vitesse de production finale, et d) on tire sur la bande (1) sortant de la ligne de contact (7), au moyen d'un entraînement supplémentaire périphérique ou central (13) et avec une force d'au moins 1 N/cm de largeur de bande.

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