Method for Controlling an Edge Section of a Film Track

Patent metadata

Field	Value
Publication number	US-2021394418-A1
Application number	US-201917287269-A
Country	US
Kind code	A1
Filing date	Nov 5, 2019
Priority date	Nov 6, 2018
Publication date	Dec 23, 2021
Grant date	—

Abstract

The invention relates to a method of controlling an edge section (RA) of a film track (FB) in a flat film machine (100), comprising the following steps:acquiring a thickness profile (DP) in at least one edge section (RA) of the film track (FB) in a transverse direction (QR) transverse to the production direction (PR) of the film track (FB),comparing at least a partial section of the acquired thickness profile (DP) of the edge section (RA) with a preset profile (VP),determining a profile deviation (PA) as a result of the comparison,performing a controlling intervention on the flat film machine (100) based on the determined profile deviation (PA).

First claim

1 - 13 . (canceled)

14 . A method of controlling an edge section of a film track in a flat film machine, comprising the following steps:
acquiring a thickness profile in at least one edge section of the film track in a transverse direction transverse to the production direction of the film track, comparing at least a partial section of the acquired thickness profile of the edge section with a preset profile, determining a profile deviation as a result of the comparison, performing a controlling intervention on the flat film machine based on the determined profile deviation.

15 . The method according to claim 14 , wherein the steps of acquiring, comparing, determining and performing the controlling intervention are carried out on both sides of both edge sections of the film track.

16 . The method according to claim 15 , wherein the method steps are carried out for identical or essentially identical edge sections of the film track.

17 . The method according to claim 15 , wherein the method steps are carried out for symmetrical or essentially symmetrical edge sections of the film track.

18 . The method according to claim 15 , wherein identical or essentially identical preset profiles are used for both edge sections.

19 . The method according to claim 15 , wherein symmetrical or essentially symmetrical preset profiles are used for both edge sections.

20 . The method according to claim 15 , wherein at least the acquired thickness profile, the determined profile deviation or the performed controlling intervention is applied to an opposite edge section.

21 . The method according to claim 14 , wherein the controlling intervention is at least qualitatively or quantitatively based on the determined profile deviation.

22 . The method according to claim 14 , wherein the method steps are carried out during the performance of a production of a feed product.

23 . The method according to claim 14 , wherein the method steps are carried out during a changing from a feed product to a follow-on product on the flat film machine.

24 . The method according to claim 23 , wherein an acquisition position of an acquisition module is changed during the changing.

25 . The method according to claim 14 , wherein the temperature of the film track is monitored in order to acquire the thickness profile.

26 . The method according to claim 14 , wherein the temperature of the film track in the region of a cooling roller is monitored in order to acquire the thickness profile.

27 . The method according to claim 14 , wherein in an outlet section downstream of an outlet nozzle of the flat film machine, a lateral extension change of the at least one edge section is acquired.

28 . A controlling device for controlling an edge section of a film track in a flat film machine, comprising an acquisition module for acquiring a thickness profile in at least one edge section of the film track in a transverse direction transverse to the production direction of the film track, a comparison module for a comparison of at least a partial section of the acquired thickness profile of the edge section with a preset profile, a determination module for determining a profile deviation as a result of the comparison, further comprising an intervention module for performing a controlling intervention on the flat film machine based on the determined profile deviation.

29 . The controlling device according to claim 28 , wherein the acquisition module, the comparison module, the determination module or the intervention module are designed for carrying out a method of controlling an edge section of a film track in a flat film machine, comprising the following steps:
acquiring a thickness profile in at least one edge section of the film track in a transverse direction transverse to the production direction of the film track, comparing at least a partial section of the acquired thickness profile of the edge section with a preset profile, determining a profile deviation as a result of the comparison, performing a controlling intervention on the flat film machine based on the determined profile deviation.

Assignees

• Windmoeller & Hoelscher

Inventors

• Schmitz Torsten
• Colell Waldemar
• Groepper Bernd-Alexander

Classifications

• B29C48/305 Primary

  having a wide opening, e.g. for forming sheets · CPC title

• B29C48/92 Primary

  Measuring, controlling or regulating · CPC title

• B29C2948/92152

  Thickness · CPC title

• B29C2948/92647

  Thickness · CPC title

• B29C48/31

  being} adjustable {, i.e. having adjustable exit sections · CPC title