CORRUGATED BOARD SYSTEM FOR PRODUCING CORRUGATED BOARD

• US 20140000785A1
• Filed: 06/27/2013
• Published: 01/02/2014
• Est. Priority Date: 06/28/2012
• Status: Active Grant

• Current Assignee: BHS Corrugated Maschinen- und Anlagenbau GmbH (Bwv-Wellpappenmaschinen Vertriebs-GmbH)
• Original Assignee: BHS Corrugated Maschinen- und Anlagenbau GmbH (Bwv-Wellpappenmaschinen Vertriebs-GmbH)
• Inventors: GNAN, Alfons, KRAUS, Helmut, REICH, Heribert, BERNREUTER, Klaus
• Granted Patent: US 9,108,382 B2
• Time in Patent Office: Days
• US Class Current: 156/64
• CPC Class Codes: B31F 1/20 Corrugating; Corrugating combined with laminating to other layers
• CPC Class Codes: B31F 1/2836 Guiding, e.g. edge alignment; Tensioning
• CPC Class Codes: B65H 23/188 in connection with running-web
• CPC Class Codes: B65H 2557/10 for signal transmission

Abstract

A corrugated board system comprises a first and a second material supply device for a first or second material web, a corrugated board production device, and a web tension measuring regulating arrangement between the corrugated board production device and the first material supply device. The arrangement comprises a web tension measuring regulating device with a web tension measuring mechanism and a first web tension regulating mechanism, and at least a second web tension regulating mechanism. The web tension measuring regulating device is arranged between the second web tension regulating mechanism and the corrugated board production device. The arrangement furthermore has an information processing unit, which receives web tension information from the web tension measuring mechanism and is configured so that to change the web tension up to a first web tension limit value, it sends web tension regulating signals to the first web tension regulating mechanism and to change the web tension beyond the first web tension limit value, it sends web tension regulating signals to the second web tension regulating mechanism.

Claims

1. A corrugated board system for producing corrugated board with

a) a first material supply device (2) for dispensing a first material web (5, 10),

b) at least a second material supply device (3) for dispensing at least a second material web (11, 16),

c) a corrugated board production device (4) for producing a corrugated board web (1) lined on at least one side from the first material web (5, 10) and the at least second material web (11, 16),

d) a web tension measuring regulating arrangement, which is arranged between the corrugated board production device (4) and the first material supply device (2), wherein the web tension measuring regulating arrangement comprises

i) a web tension measuring regulating device (20) with a web tension measuring mechanism (21) for measuring the web tension of the first material web (5, 10) and a first web tension regulating mechanism (22) for regulating the web tension of the first material web (5, 10), and

ii) at least a second web tension regulating mechanism (23) to further regulate the web tension of the first material web (5, 10), the web tension measuring regulating device (20) being arranged between the second web tension regulating mechanism (23) and the corrugated board production device (4), and

iii) an information processing unit (25), which

is connected to the web tension measuring regulating device (20) in a data-transmitting manner,

is connected to the second web tension regulating mechanism (23) in a data-transmitting manner,

receives web tension information referring to the first material web (5, 10) from the web tension measuring mechanism (21),

is configured so that to change the web tension of the first material web (5, 10) up to a first web tension limit value, it sends web tension regulating signals to the first web tension regulating mechanism (22) to actuate it, and

is configured so that to change the web tension of the first material web (5, 10) beyond the first web tension limit value, it sends web tension regulating signals to the second web tension regulating mechanism (23) to actuate it.

2. A corrugated board system according to claim 1, wherein at least one web tension regulating apparatus is provided at the first material supply device (2), wherein the at least one web tension regulating apparatus is connected to the information processing unit (25) to change the web tension of the first material web (5, 10) at the first material supply device (2) in a data-transmitting manner.

3. A corrugated board system according to claim 1, wherein at least one of the first and the at least second web tension regulating mechanism (22, 23) comprises at least one of a braking means for increasing the web tension of the first material web (5, 10) and an acceleration means to reduce the web tension of the first material web (5, 10).

4. A corrugated board system according to claim 3, wherein at least one of the braking means and the acceleration means is formed by a roller (26, 27), which is in contact with the first material web (5, 10) and can be decelerated, accelerated as well as simultaneously be decelerated, and accelerated.

5. A corrugated board system according to claim 4, wherein the roller (26, 27) can be decelerated, accelerated as well as simultaneously be decelerated, and accelerated by a drive (29, 30).

6. A corrugated board system according to claim 1, wherein the corrugated board production device (4) has a fluting mechanism for fluting at least one of the first and the at least second material web (5, 10, 11, 16) and a connecting mechanism for the fixed flat connection of the first and the at least second material web (5, 10, 11, 16) to one another.

7. A corrugated board system according to claim 6, wherein the connecting mechanism has a gluing unit and a lining unit.

8. A corrugated board system according to claim 1, wherein the web tension measuring mechanism (21) and the first web tension regulating mechanism (22) form a unit.

9. A corrugated board system according to claim 1, wherein the first and/or the at least second material supply device (2, 3) is configured as a splice device.

10. A corrugated board system according to claim 1, wherein the first web tension regulating mechanism (22) increases the web tension of the first material web (5, 10) only up to the first web tension limit value and the web tension of the first material web (5, 10) can be increased by the second web tension regulating mechanism (22) beyond the first web tension limit value.

11. A corrugated board system according to claim 1, wherein the web tension of the first material web (5, 10) at the first material supply device (2) is lower than at the corrugated board production device (4).

12. A corrugated board system according to claim 11, wherein the web tension of the first material web (5, 10) at the first material supply device (2) is substantially lower than at the corrugated board production device (4).

13. A corrugated board system according to claim 11, wherein the web tension of the first material web (5, 10) at the first material supply device (2) is greater than zero.

14. A corrugated board system according to claim 1, wherein the web tension measuring regulating arrangement has at least a third web tension regulating mechanism (53) to further regulate the web tension of the first material web (5, 10), the at least third web tension regulating mechanism (53) being connected to the information processing unit (25) in a data-transmitting manner.

15. A corrugated board system according to claim 14, wherein the at least third web tension regulating mechanism (53) is arranged upstream of the second web tension regulating mechanism (23) on the first material web (5, 10).

16. A corrugated board system according to claim 14, wherein the information processing unit (25) is configured so that to change the web tension of the first material web (5, 10) beyond a second web tension limit value, it sends web tension regulating signals to the at least third web tension regulating mechanism (53) to actuate it.

17. A corrugated board system according to claim 16, wherein upon an intentional increase of the web tension of the first material web (5, 10), the second web tension limit value is greater than the first web tension limit value.

18. A corrugated board system according to claim 16, wherein upon a further reduction of the web tension of the first material web (5, 10), the second web tension limit value is lower than the first web tension limit value.

19. A method for producing corrugated board, comprising the steps:

dispensing a first material web (5, 10) from a first material supply device (2),

dispensing at least a second material web (11, 16) from at least a second material supply device (3),

producing a corrugated board web (1) lined at least on one side from the first material web (5, 10) and the at least second material web (11, 16) using a corrugated board production device (4),

providing a web tension measuring regulating arrangement, which is arranged between the corrugated board production device (4) and the first material supply device (2), wherein the web tension measuring regulating arrangement

measures and regulates the web tension of the first material web (5, 10) using a web tension measuring regulating device (20), which, for this purpose, comprises a web tension measuring mechanism (21) and a first web tension regulating mechanism (22), and

optionally further regulates the web tension of the first material web (5, 10) using at least a second web tension regulating mechanism (23), the web tension measuring regulating device (20) being arranged between the second web tension regulating mechanism (23) and the corrugated board production device (4), and

providing an information processing unit (25), which

is connected to the web tension measuring regulating device (20) in a data-transmitting manner,

is connected to the at least second web tension regulating mechanism (23) in a data-transmitting manner,

receives web tension information referring to the first material web (5, 10) from the web tension measuring mechanism (21),

sends web tension regulating signals to change the web tension of the first material web (5, 10) up to a first web tension limit value to the first web tension regulating mechanism (22) to actuate it, and

sends web tension regulating signals to further change the web tension of the first material web (5, 10) beyond the first web tension limit value to the at least second web tension regulating mechanism (23) to actuate it.

20. A method according to claim 19, wherein the first web tension regulating mechanism (22) changes the web tension of the first material web (5, 10) substantially up to its maximum regulating power and only then is the at least second web tension regulating mechanism (23) optionally used to further change the web tension of the first material web (5, 10).

21. A method according to claim 19, wherein the at least second web tension regulating mechanism (23) arranged upstream of the first web tension regulating mechanism (22) is used when a further web tension change of the first material web (5, 10) is impossible by means of the first web tension regulating mechanism (22).

22. A method according to claim 19, wherein the web tension of the first material web (5, 10) is regulated so that when a desired web tension is input at the inlet of the corrugated board production device (4), the web tension at the outlet of the first material supply device (2) is minimal, but greater than zero.

23. A method according to claim 19, wherein the web tension of the first material web (5, 10) between the first material supply device (2) and the corrugated board production device (4) is regulated so that the web tension of the first material web (5, 10) remains the same in portions and changes in a step-like manner at the first web tension regulating mechanism (22), when the latter is in use.

24. A method according to claim 19, wherein the web tension of the first material web (5, 10) between the first material supply device (2) and the corrugated board production device (4) is regulated so that the web tension of the first material web (5, 10) remains the same in portions and changes in a step-like manner at the at least second web tension regulating mechanism (23), when the latter is in use.

25. A method according to claim 19, wherein the first web tension regulating mechanism (22) increases the web tension of the first material web (5, 10) when the web tension of the first material web (5, 10) measured by the web tension measuring mechanism (21) is lower than a web tension desired value of the first material web (5, 10).

26. A method according to claim 19, wherein the first web tension regulating mechanism (22) reduces the web tension of the first material web (5, 10), when the web tension of the first material web (5, 10) measured by the web tension measuring mechanism (21) is greater than a web tension desired value of the first material web (5, 10).

27. A method according to claim 19, wherein the at least second web tension regulating mechanism (23) is only actuated when the web tension of the first material web (5, 10) measured by the web tension measuring mechanism (21) differs from a web tension desired value of the first material web (5, 10) and the first web tension regulating mechanism (22) is adjusted to maximum web tension change.

28. A method according to claim 19, wherein the web tension measuring regulating arrangement has at least a third web tension regulating mechanism (53) to further regulate the web tension of the first material web (5, 10), the at least third web tension regulating mechanism (53) being connected to the information processing unit (25) in a data-transmitting manner.

29. A method according to claim 28, wherein the at least third web tension regulating mechanism (53) is arranged upstream of the second web tension regulating mechanism (23) on the first material web (5, 10).

30. A method according to claim 28, wherein the information processing unit (25) is configured so that to change the web tension of the first material web (5, 10) beyond a second web tension limit value, it sends web tension regulating signals to the at least third web tension regulating mechanism (53) to actuate it.

31. A method according to claim 30, wherein upon an intentional increase in the web tension of the first material web (5, 10), the second web tension limit value is greater than the first web tension limit value.

32. A method according to claim 30, wherein upon a further reduction in the web tension of the first material web (5, 10), the second web tension limit value is lower than the first web tension limit value.

33. A method according to claim 28, wherein the second web tension regulating mechanism (23) changes the web tension of the first material web (5, 10) substantially up to its maximum regulating power and only then is the at least third web tension regulating mechanism (53) optionally used to further change the web tension of the first material web (5, 10).

34. A method according to claim 28, wherein the at least third web tension regulating mechanism (53) arranged upstream of the second web tension regulating mechanism (23) is used when a further web tension change of the first material web (5, 10) by the second web tension regulating mechanism (23) is impossible.

35. A method according to claim 28, wherein the web tension of the first material web (5, 10) between the first material supply device (2) and the corrugated board production device (4) is regulated so that the web tension of the first material web (5, 10) remains the same in portions and changes in a step-like manner at the at least third web tension regulating mechanism (53) when the latter is in use.

36. A method according to claim 28, wherein the at least third web tension regulating mechanism (53) is only actuated when the web tension of the first material web (5, 10) measured by the web tension measuring mechanism (21) differs from a web tension desired value of the first material web (5, 10) and the second web tension regulating mechanism (23) is adjusted to the maximum web tension change.