Anti-vibration system for high speed winding of sheet...

B - Operations – Transporting – 65 – H

Patent

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Details

B65H 18/00 (2006.01) B65H 18/16 (2006.01)

Patent

CA 2226155

A system and method for controlling vibration of an axially rotatable mandrel useable for winding sheet material including stretch film thereabout. The system includes first, second and third roller members rotatably contactable with the mandrel and sheet material wound thereabout. The roller members are arranged about the mandrel axis so that the mandrel and any sheet material wound about the mandrel is supportably captured between the roller members to prevent or at least substantially reduce vibration of the rotatable mandrel. At least the first and second roller members are biasable toward the mandrel with pneumatic pressure from corresponding air over oil cylinders, and the first and second roller members are movable away from the mandrel against hydraulic resistance from the corresponding air over oil cylinders to accommodate sheet material wound increasingly about the mandrel. In one configuration, first and second mandrels are rotatably coupled to a rotatable turret that alternately positions the mandrels relative to a power driven lay- on roll, wherein each mandrel has at least one corresponding set of first and second roller members which cooperate with the lay-on roll to prevent vibration of the rotating mandrel.

Cette invention concerne une méthode et un système d'amortissement des vibrations d'un mandrin tournant autour de son axe longitudinal pour le bobinage de matériau en bande doublé d'une pellicule étirable. Le système comprend un premier, un deuxième et un troisième cylindres amenables en contact roulant avec le mandrin et le matériau en bande bobiné. Les cylindres sont disposés autour du mandrin de manière à enserrer celui-ci et le matériau en bande bobiné, et à prévenir ou au moins à réduire sensiblement la vibration dudit mandrin. Au moins le premier et le deuxième cylindres sont serrés contre le mandrin par des vérins oléopneumatiques et peuvent s'en écarter contre la pression hydraulique des vérins oléopneumatiques correspondants à mesure que le diamètre de la bobine enroulée augmente. Dans une configuration, un premier et un second mandrins tournants sont montés sur une tourelle qui positionne l'un après l'autre lesdits mandrins par rapport à un cylindre presseur motorisé, chaque mandrin étant associé à au moins un jeu correspondant de cylindres qui agissent de concert avec le cylindre presseur pour empêcher la naissance de vibrations dans l'ensemble.

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