METHOD FOR DETERMINING THE WINDING QUALITY OF A FILM ROLL

• US 20150284211A1
• Filed: 09/26/2013
• Published: 10/08/2015
• Est. Priority Date: 11/09/2012
• Status: Active Grant

• Current Assignee: Windmöller & Hölscher KG
• Original Assignee: Windmöller & Hölscher KG
• Inventors: Hoffmann, Frank
• Granted Patent: US 9,731,929 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B65H 18/26 Mechanisms for controlling contact pressure on winding-web package, e.g. for regulating the quantity of air between web layers
• CPC Class Codes: B65H 2220/01 indicating an entity as a function of which control, adjustment or change is performed, i.e. input
• CPC Class Codes: B65H 2220/02 indicating an entity which is controlled, adjusted or changed by a control process, i.e. output
• CPC Class Codes: B65H 2511/10 Size; Dimensions
• CPC Class Codes: B65H 2515/12 Density
• CPC Class Codes: B65H 2515/31 Tensile forces
• CPC Class Codes: B65H 2515/314 Tension profile, i.e. distribution of tension, e.g. across the material feeding direction or along diameter of web roll
• CPC Class Codes: B65H 2515/81 Rigidity; Stiffness; Elasticity
• CPC Class Codes: B65H 2515/84 Quality; Condition, e.g. degree of wear
• CPC Class Codes: B65H 2553/30 using acoustic or ultrasonic elements
• CPC Class Codes: B65H 2553/40 using optical, e.g. photographic, elements
• CPC Class Codes: B65H 2553/41 Photoelectric detectors
• CPC Class Codes: B65H 43/00 Use of control, checking, or safety devices, e.g. automatic devices comprising an element for sensing a variable

Abstract

Method for the determination of the winder quality of a film roll (10) of a film (30) on a winder roller (20) comprising the following steps:

• • determination of the roll hardness (WH) of the film roll (10) during the winding on of the film (30) on the winder roller (20),
  • determination of a variation from the determined roll hardness (WH) of the film roll (10) from at least one standard value (V1, V2) for the roll hardness (WH) of the film roll (10),
  • determination of the film roll (10) using the determined variation.

Claims

1. Method for the determination of the winder quality of a film roll of a film on a winder roller comprising the following steps:

determination of the roll hardness of the film roll during the winding on of the film on the winder roller as a measure for the size of air spaces between film layers of the film in a direct manner at the film roll,

determination of a variation from the determined roll hardness of the film roll from at least one standard value for the roll hardness of the film roll,

determination of the film roll using the determined variation.

2. Method according to claim 1, characterized in that

at least the step of determination of the roll hardness of the film roll occur continuously or mainly continuously.

3. Method according to claim 1, characterized in that

the step of determination of the roll hardness of the film roll during the winding on is contactlessly performed.

4. Method according to claim 1, characterized in that

the step of determination of the roll hardness of the film roll during the winding on is performed using at least one of the following methods:

ultra sonic measurement

laser measurement

radar measurement, terahertz, microwaves

contacting track roller.

5. Method according to claim 1, characterized in that

at least two standard values define a standard area as upper standard value and lower standard value.

6. Method according to claim 1, characterized in that

a step for the submission of at least one operating parameter is performed which influences the winder quality wherein these operating parameters are configured in a specific manner regarding the dimension of the film of the film roll.

7. Method according to claim 1, characterized in that

the determined winder quality and/or the determined variation is used as an input parameter for the regulation of at least one operating parameter which influences the winder quality, at least one of the following operating parameters:

web tension contact roller

web tension winder roller

contact pressure contact roller.

8. Method according to claim 7, characterized in that

during the regulation of at least one operating parameter the radial pressure pattern is considered which adjusts during the winding on of the film roll.

9. Method according to one of the preceding claims 1, characterized in that

in direction transverse to the winding on direction of the film an at least twofold sectional determination of the roll hardness. of the film roll occurs during the winding on to the winder roll.

10. Method according to claim 9, characterized in that

in the direction transverse to the winding on direction of the film the roll hardness a manufacturing profile of the film is kept constant or mainly constant by the regulation of at least one operation parameter.

11. Method according to characterized in that

on the basis of the determined winder quality or the determined variation an alteration of a manufacturing profile of the film is performed in a previous production process.

12. Monitoring device for monitoring of the winder quality of a film roll of a film on a winder roll comprising at least a sensor device for the determination of the roll hardness of the film roll during the winding on of the film on the winder roll as a measure for the size of air spaces between film layers of the film in a direct manner at the film roll, further comprising a control device, which is configured for the determination of a variation of the determined roll hardness of the film roll of at least one standard value for the roll hardness of the film roll and the determination of the winder quality of the film roll by means of the determined variation.

13. Monitoring device according to claim 12, characterized in that

the control device is configured that at least the step of determination of the roll hardness of the film roll occurs continuously or mainly continuously.

14. Monitoring device according to claim 12, characterized in that

the control device is configured for a simple change between manual, semi automatic and full automatic operation.