Method for Switching the Production of a Flat Film Machine from a Feed Product to a Follow-On Product

Patent metadata

Field	Value
Publication number	US-2021323213-A1
Application number	US-201917287266-A
Country	US
Kind code	A1
Filing date	Nov 5, 2019
Priority date	Nov 6, 2018
Publication date	Oct 21, 2021
Grant date	—

Abstract

The invention relates to a method for switching the production of a flat film machine (100) from a feed product (EP) to a follow-on product (FP), comprising the following steps:recognizing a switching request for a switch from the feed product (EP) to the follow-on product (FP),determining a current feed control value (ES) of at least one control variable (SG) of the flat film machine (100) for the feed product (EP),determining a follow-on control value (FS) of the same at least one control variable (SG) for the follow-on product (FP),generating a control signal (SS) for a defined variation of the at least one control variable (SG) of the flat film machine (100) from the feed control value (ES) to the follow-on control value (FS).

First claim

1 - 13 . (canceled)

14 . A method for switching the production of a flat film machine from a feed product to a follow-on product, comprising the following steps:
recognizing a switching request for a switch from the feed product to the follow-on product, determining a current feed control value of at least one control variable of the flat film machine for the feed product, determining a follow-on control value of the same at least one control variable for the follow-on product, generating a control signal for a defined variation of the at least one control variable of the flat film machine from the feed control value to the follow-on control value.

15 . The method according to claim 14 , wherein the feed product differs from the follow-on product by at least one of the following product parameters:
width of a film track thickness of a film track temperature of a film track composition of a film track layer distribution of a film track quality parameters of the film track production stability of the film track film thickness ratio of the film track temperature profile of the film track width difference of the film track control profile of adjusting bolts of the outlet nozzle machine parameters of the flat film machine discharge width of the outlet nozzle thickness profile of the film track

16 . The method according to claim 14 , wherein a stored flow behavior of the flat film machine is taken into account when generating the control signal.

17 . The method according to claim 14 , wherein a stored flow behavior of a nozzle device of the flat film machine is taken into account when generating the control signal.

18 . The method according to claim 14 , wherein at least one stored production parameter of the flat film machine of a production database is taken into account when generating the control signal.

19 . The method according to claim 14 , wherein at least one production parameter or a stored control signal from a changing database is taken into account when generating the control signal.

20 . The method according to claim 14 , wherein a melt flow distribution of the flat film machine is varied by the control signal.

21 . The method according to claim 14 , wherein the control variable is formed by the working width of the flat film machine.

22 . The method according to claim 21 , wherein a change in the position of at least one lateral sealing blade in a nozzle discharge slot of the flat film machine is generated as control signal from the feed control value to the follow-on control value.

23 . The method according to claim 14 , wherein at least one quality parameter of the follow-on product is selected as the control variable.

24 . The method according to claim 14 , wherein at least a local or a global slot size of a nozzle discharge slot of the flat film machine is selected as the control variable.

25 . The method according to claim 14 , wherein an edge stability at least of the feed product or of the follow-on product is selected as the control variable.

26 . The method according to claim 14 , wherein at least two feed control values are varied into at least two follow-on control values at least partially simultaneously.

27 . A switching device for switching the production of a flat film machine from a feed product to a follow-on product, comprising a recognition module for recognizing a switching request for a switch from the feed product to the follow-on product, a determination module for determining a current feed control value of at least one control variable of the flat film machine for the feed product and for determining a follow-on control value of the same at least one control variable for the follow-on product, and a generation module for generating a control signal for a defined variation of the at least one control variable of the flat film machine from the feed control value to the follow-on control value.

Assignees

• Windmoeller & Hoelscher

Inventors

• Schmitz Torsten
• Colell Waldemar
• Groepper Bernd-Alexander

Classifications

• B29C48/2692 Primary

  Material change · CPC title

• B29C48/92 Primary

  Measuring, controlling or regulating · CPC title

• B29C2948/92904

  Die; Nozzle zone · CPC title

• B29C2948/92209

  Temperature · CPC title

• B29C2948/92152

  Thickness · CPC title