Calibrating device for a blown film tube

Patent metadata

Field	Value
Publication number	US-9889593-B2
Application number	US-201113820857-A
Country	US
Kind code	B2
Filing date	Sep 8, 2011
Priority date	Sep 8, 2010
Publication date	Feb 13, 2018
Grant date	Feb 13, 2018

Abstract

A calibration device for calibrating a film hose produced via a blow-extrusion film device, by which the film hose can be brought into a desired diameter, has at least one film guiding element, by which the film hose can be guided. The film guiding element includes at least one elastically deformable element.

First claim

What is claimed is:

1. A calibration device for variable diameter calibration of a film hose produced via a blow-extrusion film device, by which the film hose is produced in a specified diameter, the calibration device comprising:
a film guiding element by which the film hose, which is supported on an interior thereof by a first fluid, is guided, the film guiding element (i) including an elastically deformable element that contains therewithin and in direct contact therewith, a second fluid, and (ii) being located on an exterior of the guided film hose; and
a third fluid disposed between the elastically deformable element and an external surface of the film hose, the third fluid flowing downward between the external surface of the film hose and the elastically deformable element so as to reduce friction therebetween,
with the variable diameter calibration being effected by application of a force to, or removal of the force from, the elastically deformable element, so as to expand or contract, respectively, the elastically deformable element toward or from the external surface of the film hose, and provide the specified diameter of the film hose.

2. The calibration device according to claim 1 , wherein the force is applied to the elastically deformable element via a force generating device.

3. The calibration device according to claim 2 , wherein the force generating device includes an adjustment mechanism, by which the force can be changed.

4. The calibration device according to claim 2 , wherein the force that is applied to the elastically deformable element is the application of a pressure or a vacuum to the second fluid.

5. The calibration device according to claim 2 , wherein the force that is applied to the elastically deformable element is at least one of an electromagnetic force and a magnetic force.

6. The calibration device according to claim 1 , wherein the elastically deformable element is arranged inside a component having an open hollow space, and which is in a sealing contact therewith at least one of facial edges and an area of an exterior surface of the component.

7. The calibration device according to claim 6 , further comprising at least a second elastically deformable element that is arranged between the elastically deformable element and the component having the open hollow space.

8. The calibration device according to claim 6 , wherein at least a section of the elastically deformable element can be moved relative to the component along an area of said component.

9. The calibration device according to claim 1 , wherein the second fluid is a gas.

10. The calibration device according to claim 9 , wherein the gas is air.

11. The calibration device according to claim 6 , wherein the component is a tubular or a cylindrical element, and wherein a space between the tubular or the cylindrical element and the elastically deformable element can be impinged with the second fluid subject to a pressure or a vacuum.

12. The calibration device according to claim 1 , wherein the third fluid is a liquid.

13. The calibration device according to claim 12 , wherein the liquid is water.

14. The calibration device according to claim l, wherein the third fluid is employed to cool the film hose.

15. The calibration device according to claim 1 , wherein the elastically deformable element that contains the second fluid is secured with a fluid-impermeable connection.

16. The calibration device according to claim 1 , wherein the first fluid that supports the interior of the film hose is a gas.

17. The calibration device according to claim 16 , wherein the gas is air.

18. A device for variable diameter calibration to a specified diameter of a film hose produced with a blow-extrusion film device, the device comprising:
a film guiding element that guides the film hose, which is supported on an interior thereof by a first fluid, the film guiding element (i) including an elastically deformable element that contains therewithin and in direct contact therewith, a second fluid and, (ii) being located on an exterior of the guided film hose; and
a water inlet that supplies water so as to provide a column of water between the elastically deformable element and an external surface of the film hose, the water flowing downward between the external surface of the film hose and the elastically deformable element so as to reduce friction therebetween,
with the variable diameter calibration being effected by application of force to, or removal the force from, the elastically deformable element, so as to expand or contract, respectively, the elastically deformable element toward or from the external surface of the film hose, and provide the specified diameter the film hose.

19. The device according to claim 18 , wherein the water inlet supplies the water to a portion of the device at which the guided film departs from contact with the elastically deformable element.

20. The device according to claim 18 , wherein the water inlet supplies the water such that the downward flow of the water column is countercurrent to a travel direction of the guided film hose.

21. The device according to claim 18 , wherein the water column is employed to cool the film hose.

22. A method of variable diameter calibration to a specified diameter of a film hose produced with a blow-extrusion film device, the method comprising:
guiding the film hose, which is supported on an interior thereof by a first fluid, with a film guiding element, the film guiding element (i) including an elastically deformable element that contains therewithin and in direct contact therewith, a second fluid, and (ii) being located on an exterior of the guided film hose; and
providing a third fluid between the elastically deformable element and an external surface of the film hose, the third fluid flowing downward between the external surface of the film hose and the elastically deformable element so as to reduce friction therebetween,
with the variable diameter calibration being effected by application of a force to, or removal of the force from, the elastically deformable element, so as to expand or contract, respectively, the elastically deformable element toward or from the external surface of the film hose, and provide the specified diameter of the film hose.

23. The method according to claim 22 , wherein a force is applied to the elastically deformable element via a force generating device.

24. The method according to claim 23 , wherein a magnitude of the applied force is adjustable so as to change a diameter of the elastically deformable element.

Assignees

• Goldenstein Jens
• Windmoeller & Hoelscher

Inventors

• Goldenstein Jens

Classifications

• B29C48/9135

  of flat articles, e.g. using specially adapted supporting means · CPC title

• B29C48/903 Primary

  externally · CPC title

• B29C48/907

  using adjustable calibrators, e.g. the dimensions of the calibrator being changeable · CPC title

• B29C48/355

  Conveyors for extruded articles · CPC title

• B29C48/908

  characterised by calibrator surface, e.g. structure or holes for lubrication, cooling or venting · CPC title