Method for winding a material sheet and winding device
AssigneeSml Maschinengesellschaft M.B.H.
InventorsThomas Rauscher, Christoph Iglseder
Life of this patent
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Abstract
A method for winding a material sheet, in particular a plastic film, by a winding device, wherein the material sheet is guided from at least one first roller to at least one second roller in a conveying direction. At least one cutting device is arranged between the first roller and the second roller to cut the material sheet into at least two partial sheets. The partial sheets are each wound up into a bobbin in the conveying direction behind the second roller. The at least one first roller and the at least one second roller are each driven by a drive so that the tensile stress in the material sheet or in the partial sheets changes periodically over time in the conveying direction of the material sheet.
Claims16
A method for winding a material sheet with a winding device, wherein the material sheet is guided from at least one first roller to at least one second roller in a conveying direction, wherein at least one cutting device is arranged between the first roller and the second roller, wherein the cutting device cuts the material sheet into at least two partial sheets, wherein the partial sheets are each wound up into a bobbin in the conveying direction behind the second roller, wherein the at least one first roller and the at least one second roller are each driven by a drive in such a way that the tensile stress in the material sheet or in the partial sheets changes periodically over time in the conveying direction of the material sheet so that cutting edges of the partial sheets when wound up into the bobbin do not all lie on top of each other, but run variably.
A winding device for winding a material sheet, which comprises:
- at least one first roller and at least one second roller with which the material sheet can be guided in a conveying direction, wherein the first roller and the second roller are each connected to a drive with which the rollers can be rotated,
- at least one cutting device arranged between the first roller and the second roller in order to be able to cut the material sheet into at least two partial sheets,
- at least one winder for winding up the partial sheets, wherein the winder is arranged downstream of the second roller in the conveying direction,
- wherein the drives of the first roller and the second roller are connected to a control device, wherein the control device is configured to drive one of the rollers at a periodically variable rotational speed so that cutting edges of the partial sheets when wound up into the bobbin do not all lie on top of each other, but run variably.
Dependencies are inferred from the claim text.