Method for controlling film production

Patent metadata

Field	Value
Publication number	US-11660799-B2
Application number	US-201816608840-A
Country	US
Kind code	B2
Filing date	Apr 20, 2018
Priority date	Apr 26, 2017
Publication date	May 30, 2023
Grant date	May 30, 2023

Abstract

The invention relates to a method (100) for controlling film production, in which at least one film is produced according to at least one formula information (R), the following steps being carried out: initiation of execution (210) of a film production process such that a film is produced on the basis of a specific formulation information (R); determination of monitoring information (I) during the execution (210) of the process; determination of at least one fingerprint (F) on the basis of the specific formula information (R) and on the basis of the monitoring information (I) such that the execution (210) of the process is characterised on the basis of the fingerprint (F); and comparison of the fingerprint (F) with a control matrix (M) such that at least one comparative result is determined in order to control the film production on the basis of the control matrix (M) as an evaluation basis.

First claim

The invention claimed is:

1. A method for controlling film production, in which at least one film is produced depending on at least one recipe information,
where the following steps are performed:
initiating a method execution for film production so that a film is produced based on specific recipe information,
determination of monitoring information during method execution,
determining at least one fingerprint from the specific recipe information and from the monitoring information such that the method execution is characterized by the fingerprint,
comparison of the fingerprint with a control matrix, so that at least one comparison result for controlling film production is determined on the basis of the control matrix as the basis for evaluation,

wherein the following step is performed after comparing the fingerprint:
evaluating a quality of at least the method execution or the produced film based on the at least one comparison result, so that an evaluation result is determined, wherein the quality is correlated with a correspondence between at least one determined product property of the produced film and a given product property, whereby the control matrix is specific for the given product property and wherein a high quality corresponds to a high agreement between the determined product property and the given product property,

wherein the following step is performed after evaluating the quality:
storing the evaluation result as a function of a roll identifier.

2. The method according to claim 1 ,
wherein
the control matrix comprises at least one comparison criteria for values of the fingerprint so that the method execution is controlled, preferably at least evaluated or adapted or visualized or managed or regulated as a function of the comparison criteria using the comparison result.

3. The method according to claim 1 ,
wherein
the control matrix comprises a tolerance range as a comparison criterion, and the comparison result is determined directly or indirectly by determining relationship information, preferably at least distance information or variation information or information about at least an overshoot or undershoot of at least one value from the fingerprint to at least one limit.

4. The method according to claim 1 ,
wherein
at least one of the following steps is performed after evaluating the quality:
at least automatic evaluation or adjustment of the recipe information on the basis of the evaluation result,
automatic adjustment of a tolerance range of the control matrix based on the evaluation result.

5. The method according to claim 1 ,
wherein
at least one of the following steps is performed after comparing the fingerprint:
at least initiating an alarm or a warning when the at least one comparison result fulfils an alarm or warning condition, preferably when a relationship information indicates a crossing of a border,
performing a plausibility check from the at least one comparison result, wherein a warning is initiated if the plausibility check is negative.

6. The method according to claim 1 ,
wherein
the following step is performed after comparing the fingerprint:
performing an active control of the method execution depending on the at least one comparison result in order to improve the quality of the film produced, preferably by control of a film production machine, the control preferably being performed at least partially automatically.

7. The method according to claim 1 ,
wherein
at least one measurement is performed during the method execution in order to determine the monitoring information, the measurement preferably being performed for at least one method parameter or at least one method variable during the method execution.

8. The method according to claim 1 ,
wherein
the recipe information for different individual parameters of the method execution in each case comprises at least one piece of information, in particular:
at least information for material mixing during method execution,
at least one information for at least one method parameter of the method execution,
at least one information for a method variable of the method execution.

9. The method according to claim 8 ,
wherein
the following steps are performed one after the other at least during or after comparing the fingerprint:
determining comparison results for a plurality of the individual parameters, in particular by comparing the values of the monitoring information specific to the respective individual parameters with at least one respective comparison criterion of the control matrix,
determining an individual quality score for each of the comparison results so that the individual quality score is specific to a particular individual parameter,
determining a single quality index from the individual quality indexes to identify at least a quality of the method execution or the film produced, preferably prioritizing the individual quality indexes to determine.

10. The method according to claim 1 ,
wherein
before the method execution is initiated, the control matrix is determined taking into account at least a multiplicity of preceding method executions or comparison results.

11. The method according to claim 1 ,
wherein
the control matrix is adapted to the film produced by the method execution on the basis of at least the comparison result or at least one product property, so that the control matrix is optimized for a predetermined product property.

12. The method according to claim 1 ,
wherein
the following steps for determining the control matrix are performed before initiating the method execution as a subsequent method execution:
determining a correlation for preceding method executions with respect to the product properties of the films produced thereby, preferably on the basis of at least one particular fingerprint for each of the preceding method executions, so that a correlation result is determined,
at least determining or adjusting a tolerance range of the control matrix on the basis of the correlation result in order to at least adjust the subsequent method execution or further subsequent method executions on the basis of the control matrix taking into account the correlation.

13. The method according to claim 1 ,
wherein
the following steps are performed during the method execution or during each further method execution:
at least evaluating a correlation for the method execution or the further method executions between at least one product property of the at least one film produced thereby and the fingerprint determined thereby in each case, so that a correlation result is determined,
adjusting the control matrix on the basis of the correlation result so that the control matrix is specific for at least one predetermined product property.

14. The method according to claim 12 ,
wherein
the correlation is evaluated across all recipes for different method executions by means of which in each case a film is produced using different recipe information.

Assignees

• Windmoeller & Hoelscher

Inventors

• Backmann Martin
• Bussmann Markus

Classifications

• G05B19/41875 Primary

  characterised by quality surveillance of production · CPC title

• G05B2219/32018

  Adapt process as function of results of quality measuring until maximum quality · CPC title

• G05B2219/34457

  Emit alarm signal · CPC title

• Y02P90/02

  Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS] · CPC title

• G05B2219/32184

  Compare time, quality, state of operators with threshold value · CPC title