Device and method for calibrating a blown film
AssigneeWindmoller & Holscher
InventorsJens Goldenstein, Henning Steuter
Life of this patent
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Abstract
A device and a method for calibrating a blown film are provided, said device comprising: a tubular region with at least one inner wall, through which region the blown film can be passed; a liquid reservoir, which can be used to provide a liquid and which is situated above the tubular region, the liquid being guidable between the inner wall and the blown film; and a suctioning device, situated below the tubular region, for suctioning off at least part of the liquid from the blown film. At least one liquid-permeable element is provided, said element surrounding at least parts of the periphery of the blown film. This device permits the distance of the liquid-permeable element from the main axis of the blown film to be altered.
Claims11
A device for cooling of a blown film, wherein the device comprises:
- a device for delivery of liquid to the outer wall of the blown film, wherein the film can be cooled with the liquid,
- two or more diversion elements for diversion of at least a part of the liquid from the blown film, wherein each diversion element comprises a liquid-permeable element that surrounds at least parts of the blown film,
- wherein the device for delivery of liquid includes at least one film guidance element with at least one inner wall, which is arranged at least in part around the blown film and along which the blown film is guidable,
- wherein:
- the two or more diversion elements are arranged beneath the at least one film guidance element, wherein each diversion element overlaps itself or at least one other adjoining diversion element in partial areas and in their totality completely surround the blown film, and
- a radial interval which the two or more diversion elements assume to the axis in the axial direction of the blown film, is alterable.
A method for cooling a blown film in which:
- with a device for application of liquid, a liquid is applied to the outer wall of the blown film, whereby the film is cooled by the liquid,
- with two or more diversion elements for diversion at least of a part of the liquid from the blown film is diverted, wherein each diversion element comprises a liquid-permeable element that surrounds at least parts of the blown film in the peripheral direction,
- the device for application of liquid includes at least one film guidance element with at least one inner wall, which is arranged at least in part around the blown film and along which the blown film is guided,
- wherein:
- each of the two or more diversion elements overlaps itself or at least one other adjoining diversion element in partial areas and in their totality completely surround the blown film, and
- with an alteration in the diameter of the blown film, a radial interval which the diversion elements assume to the axis in the axial direction of the blown film, is altered.
Dependencies are inferred from the claim text.