CORRUGATING ROLL

• US 20170232699A1
• Filed: 02/09/2017
• Published: 08/17/2017
• Est. Priority Date: 02/11/2016
• 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: STDELE, Norbert, SCHELL, Markus, GNAN, Alfons
• Granted Patent: US 10,457,010 B2
• Time in Patent Office: Days
• CPC Class Codes: B31F 1/2804 Methods
• CPC Class Codes: B31F 1/2863 Corrugating cylinders; Supporting or positioning means therefor; Drives therefor
• CPC Class Codes: B31F 1/2877 Pressing means for bringing facer sheet and corrugated webs into contact or keeping them in contact, e.g. rolls, belts

Abstract

The invention concerns a corrugating roll for producing a corrugated web, having a fluting, from a material web. The corrugating roll has a corrugating roll body, a central longitudinal axis, a peripheral direction about the central longitudinal axis and a surface fluting with at least one first corrugating tooth, which is arranged peripherally on the corrugating roll body, and at least one second corrugating tooth arranged peripherally on the corrugating roll body and which differs from the at least one first corrugating tooth for reducing corrugating roll operation-related vibrations.

Claims

1. A corrugating roll for producing a corrugated web (2), having a fluting (1), from a material web (3),

a) with a corrugating roll body (37),

b) with a central longitudinal axis (4, 6),

c) with a peripheral direction (28, 29) about the central longitudinal axis (4, 6), and

d) with a surface fluting (30;

30a;

30b;

30c;

30d;

30e), which has

i) at least one first corrugating tooth (31), arranged peripherally on the corrugating roll body (37), and

ii) at least one second corrugating tooth (38;

38a;

38b;

38c;

38d;

38e), which is arranged peripherally on the corrugating roll body (37) and which differs from the at least one first corrugating tooth (31) for reducing corrugating roll operation-related vibrations.

2. A corrugating roll according to claim 1, wherein the at least one first corrugating tooth (31) has a first tooth form and the at least one second corrugating tooth (38;

38a;

38b;

38c;

38d;

38e) has a second tooth form, wherein the first tooth form and the second tooth form, at least regionally, are different.

3. A corrugating roll according to claim 1, wherein the at least one first corrugating tooth (31) has a first crest form (34) and the at least one second corrugating tooth (38;

38a;

38b) has a second crest form (48;

48a;

48b), wherein the first crest form (34) and the second crest form (48;

48a;

48b), at least regionally, differ from each other.

4. A corrugating roll according to claim 1 wherein the at least one first corrugating tooth (31) has a first crest curvature and the at least one second corrugating tooth (38;

38a;

38b) has a second crest curvature, wherein the first crest curvature and the second crest curvature, at least regionally, are different.

5. A corrugating roll according to claim 1, wherein the at least one first corrugating tooth (31) has a first radial tooth height (H1) measured from the corrugating roll body (37) and the at least one second corrugating tooth (38;

38b) has a second radial tooth height (H2;

H2b) measured from the corrugating roll body (37), wherein there is a respective radial height difference between the first radial tooth height (H1) and the second radial tooth height (H2;

H2b).

6. A corrugating roll according to claim 5, wherein the radial height difference between the first tooth height (H1) and the second tooth height (H2;

H2b) is respectively between 0.001 mm and 0.1 mm.

7. A corrugating roll according to claim 5, wherein the second radial tooth height (H2;

H2b) is respectively between 0.1% and 10% one of smaller and greater than the first radial tooth height (H1).

8. A corrugating roll according to claim 1, wherein the at least one first corrugating tooth (31) has a first tooth thickness (d) in the peripheral direction (28, 29) and the at least one second corrugating tooth (38;

38a;

38b;

38c;

38d;

38e) has a second tooth thickness (d2;

d2a;

d2b;

d2c;

d2d;

d2e) in the peripheral direction (28, 29), wherein the first tooth thickness (d) and the second tooth thickness (d2;

d2a;

d2b;

d2c;

d2d;

d2e), at least regionally, differ from each other.

9. A corrugating roll according to claim 1, wherein the at least one first corrugating tooth (31) has at least one first flank (35, 36) and the at least one second corrugating tooth (38;

38a;

38b;

38c;

38d;

38e) has at least one second flank (35, 36;

35a, 36a;

36b;

35c, 36c;

35d, 36d;

35e), wherein the at least one first flank (35, 36) and the at least one second flank (35, 36;

35a, 36a;

36b;

35c, 36c;

35d, 36d;

35e), at least regionally, differ from each other in their course.

10. A corrugating roll according to claim 1, wherein the at least one first corrugating tooth (31) has a first root and the at least one second corrugating tooth (38c;

38d;

38e) has a second root, wherein the first root and the second root, at least regionally, differ from each other.

11. A corrugating roll according to claim 10, comprising several of the second corrugating teeth (38c;

38d), wherein, respectively, a second corrugating tooth valley (32c;

32d) is delimited by two adjacently arranged second corrugating teeth (38c;

38d) and differs in its radial depth from a first corrugating tooth valley (32) delimited by at least one corrugating tooth (31).

12. A corrugating roll according to claim 1, comprising several of the first corrugating teeth (31) and several of the second corrugating teeth (38;

38a;

38b;

38c;

38d;

38e).

13. A corrugating roll according to claim 12, wherein the first corrugating teeth (31) and the second corrugating teeth (38;

38a;

38b;

38c;

38d;

38e) are arranged periodically with respect to each other on the corrugating roll body (37).

14. A corrugating roll according to claim 12, wherein a first pitch (T) exists between the first corrugating teeth (31) adjacently arranged in the peripheral direction (28, 29), and a second pitch (T2;

T21, T22) exists between a first corrugating tooth (31) and the second corrugating tooth (38a;

38b;

38e) arranged adjacent to it in the peripheral direction (28, 29), wherein the first pitch (T) and the second pitch (T2;

T21, T22) are different.

15. A corrugating roll according to claim 12, wherein a first pitch (T) exists between the first corrugating teeth (31) adjacently arranged in the peripheral direction (28, 29), and a second pitch (T2;

T21, T22) exists between a first corrugating tooth (31) and the second corrugating tooth (38a;

38b;

38e) arranged adjacent to it in the peripheral direction (28, 29), wherein the first pitch (T) and the second pitch (T2;

T21, T22) differ from each other by 0.005 mm to 0.1 mm in the peripheral direction (28, 29).

18. A method according to claim 14, wherein the machining of the basic corrugating teeth (47) is performed by at least one machining tool (42) such that

in a first machining step, at least two basic corrugating teeth (47), arranged adjacent to each other, are always being at least partially machined simultaneously as the first corrugating teeth (31) are being formed, and

in a second machining step, after a relative displacement between the at least one machining tool (42) and the corrugating roll basic body (40), at least one first corrugating tooth (31) is always being at least partially machined again as the at least one second corrugating tooth (38;

38a;

38b;

38c;

38d;

38e) is being formed by the at least one machining tool (42) and, during the second machining step, at least one first corrugating tooth (31) remains completely unmachined.

16. A device for producing a corrugated cardboard web, comprising

a) a corrugating device for producing a corrugated web (2), having a fluting (1), from a material web (3), wherein the corrugating device comprises

i) at least one corrugating roll (5;

5a;

5b;

5c;

5d;

5e, 7) for producing a corrugated web (2), having a fluting (1), from a material web (3),

aa) with a corrugating roll body (37),

bb) with a central longitudinal axis (4, 6),

cc) with a peripheral direction (28, 29) about the central longitudinal axis (4, 6), and

dd) with a surface fluting (30;

30a;

30b;

30c;

30d;

30e), which has

j) at least one first corrugating tooth (31), arranged peripherally on the corrugating roll body (37), and

jj) at least one second corrugating tooth (38;

38a;

38b;

38c;

38d;

38e), which is arranged peripherally on the corrugating roll body (37) and which differs from the at least one first corrugating tooth (31) for reducing corrugating roll operation-related vibrations,

b) an adhesive applicator to apply adhesive to tips of the fluting (1) of the corrugated web (2), and

c) a pressing device to press a liner web on to the glue-covered tips of the corrugated web (2).

17. A method for producing a material web corrugating roll (5;

5a;

5b;

5c;

5d;

5e, 7), comprising the steps

providing of a corrugating roll basic body (40) with basic corrugating teeth (47), and

machining the basic corrugating teeth (47) upon forming at least one first corrugating tooth (31) and at least one second corrugating tooth (38;

38a;

38b;

38c;

38d;

38e), such that the at least one second corrugating tooth (38;

38a;

38b;

38c;

38d;

38e) differs from the at least one first corrugating tooth (31) for reducing corrugating roll operation-related vibrations.