Guiding device and methods for guiding a plastic film, and blown film installation

Patent metadata

Field	Value
Publication number	US-10807293-B2
Application number	US-201615573929-A
Country	US
Kind code	B2
Filing date	Jun 2, 2016
Priority date	Jun 3, 2015
Publication date	Oct 20, 2020
Grant date	Oct 20, 2020

Abstract

Calibration basket having exchangeable air guiding elements composed of porous material. The invention relates to a guiding device and to methods for guiding a plastic film, wherein the plastic film can be guided by means of an air cushion, wherein the guiding device comprises a plurality of blower elements ( 31 ) each having the foil owing features: at least one supporting element ( 35 ), at least one film-guiding element ( 34 ), which is at least partially porous, preferably microporous, and which is connected to the supporting element ( 35 ). At least one fastening element is provided, by means of which the supporting element ( 35 ) and the film-guiding element ( 34 ) can be detachably fastened to each other.

First claim

The invention claimed is:

1. A guiding device for guiding a plastic film, wherein the guiding device comprises:
a plurality of blower elements each comprising at least one supporting element and at least one film guiding element, wherein the film guiding element is at least partially porous, consists at least partially of sintered plastic material and is connected to the supporting element; and
at least one fastening element is provided, by means of which the supporting element and the film-guiding element can be detachably fastened to each other.

2. The guiding device according to claim 1 ,
wherein
the fastening element is a clamping device, by means of which the supporting element and the film-guiding element are clamped to one another.

3. The guiding device according to claim 1 ,
wherein
the clamping element can be actuated without tools.

4. The guiding device according to claim 1 ,
wherein the clamping element comprises a clamp.

5. The guiding device according to claim 1 ,
wherein the clamping element comprises an over-center catch.

6. The guiding device according to claim 1 ,
wherein the supporting element comprises at least one hook or at least one rail, in which parts, can be mounted or inserted.

7. The guiding device according to claim 1 ,
wherein
a sealing element is arranged between the supporting element and the film-guiding element.

8. The guiding device according to claim 7 ,
wherein the sealing element comprises a compressible material.

9. The guiding device according to claim 1 ,
wherein
the film-guiding element comprises a circumferential edge, by means of which it can be positioned against the support element, wherein at least parts of the surface regions of the film-guiding element lie outside the area defined by the circumferential edge.

10. The guiding device according to claim 9 ,
wherein the surface regions lying within the edge are formed without edges and/or without corners.

11. The guiding device according to claim 1 ,
wherein
the plastic material comprises polyethylene.

12. A guiding device for guiding a plastic film, wherein the guiding device comprises:
a plurality of blower elements each comprising
at least one supporting element,
at least one film guiding element, wherein the film guiding element is at least partially porous, consists at least partially of sintered plastic material and is connected to the supporting element, and
at least one bracing element by means of which the supporting element can be connected to an adjusting mechanism of the guiding device; and

at least one fastening is provided by means of which the supporting element and the bracing element can be detachably fastened to each other.

13. The guiding device according to claim 12 ,
wherein
the bracing element is formed for supplying a fluid and comprises a piece of pipe.

14. The guiding device according to claim 12 ,
wherein the fastening is formed as a bayonet closure.

15. A blown film installation for producing a plastic film with a blow head for the extrusion of the plastic film and a guiding device
wherein
the guiding device is formed according to claim 1 .

16. A method for guiding a plastic film, the method comprising employing a guiding device comprising:
a plurality of blower elements each comprising at least one supporting element and at least one film guiding element, wherein the film guiding element is at least partially porous, consists at least partially of sintered plastic material and is connected to the supporting element; and
at least one fastening element is provided, by means of which the supporting element and the film-carrying element are detachably fastened to each other.

Assignees

• Windmoeller & Hoelscher

Inventors

• Haselmann Simon
• Linkies Jürgen
• Goldenstein Jens
• Bussmann Markus

Classifications

• B29C48/265

  Support structures or bases for apparatus, e.g. frames · CPC title

• B29K2823/06

  PE, i.e. polyethylene · CPC title

• B29C48/503

  Extruder machines or parts thereof characterised by the material or by their manufacturing process (B29C48/256 takes precedence) · CPC title

• B29C48/10

  flexible, e.g. blown foils · CPC title

• B29C55/28

  of blown tubular films, e.g. by inflation {(extrusion moulding of tubular films B29C48/03)} · CPC title