CORRUGATING MACHINE AND METHOD OF PRODUCING CORRUGATED CARDBOARD

• US 20080308215A1
• Filed: 06/12/2008
• Published: 12/18/2008
• Est. Priority Date: 06/13/2007
• 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: KRAUS, Helmut, HAMMER, Jurgen
• Granted Patent: US 8,241,454 B2
• Time in Patent Office: Days
• US Class Current: 156/207
• CPC Class Codes: B31F 1/2822 involving additional operations
• CPC Class Codes: B31F 1/2831 Control
• CPC Class Codes: Y10T 156/1016 Transverse corrugating
• CPC Class Codes: Y10T 156/102 with deformation or cutting of corrugated lamina
• CPC Class Codes: Y10T 156/1084 of continuous or running length bonded web
• CPC Class Codes: Y10T 156/12 Surface bonding means and/or assembly means with cutting, punching, piercing, severing or tearing

Abstract

In a corrugating machine and a method of producing corrugated cardboard, provision is made for a marking device by means of which a color mark is applied by rubbing off a solid coloring agent, the color mark being detected by means of a detection device in order to easily and precisely mark and cut out joining points. The applied and detected color mark enables a web length of a web of single-faced corrugated cardboard in a storage device to be determined, thus allowing an electronic control device to operate a cross-cutting device in an easy and precise manner.

Claims

1. A corrugating machine for producing corrugated cardboard, comprising

a. at least three splicing devices (3, 4, 74) for providing at least three continuous webs of material (13, 21, 65);

b. at least one corrugating device (5) for producing at least one corrugated web (23) from at least one of the webs of material (21);

c. at least one first production device (6) for joining the at least one corrugated web (23) to at least another web of material (13) to form at least one web of single-faced corrugated cardboard (2);

d. at least one second production device (61) for joining the at least one web of single-faced corrugated cardboard (2) to at least another web of material (65) to form at least one web of double-faced corrugated cardboard (66);

e. at least one storage device (34) for temporarily storing the at least one web of single-faced corrugated cardboard (2), the storage device (34) being disposed between the production devices (6, 61);

f. at least one marking device (39) for applying at least one color mark (40) to at least one of the webs (2, 13, 21, 23), the marking device (39) being disposed upstream of the at least one storage device (34) when seen in a transport direction (35), wherein the at least one marking device (39) is designed such that a coloring agent (41) is applicable to create a color mark (40), the coloring agent (41) being present in solid form;

g. at least one detection device (60) for detecting the at least one color mark (40), the detection device (60) being disposed down-stream of the at least one storage device (34) when seen in the transport direction (35);

h. at least one electronic control device (86) for determining a web length (L_B) of the at least one temporarily stored web of corrugated cardboard (2) by means of the at least one applied and detected color mark (40); and

i. at least one cross-cutting device (82) for cutting the at least one web of double-faced corrugated cardboard (66) in dependence of the determined web length (L_B).

2. A corrugating machine according to claim 1, wherein the at least one marking device (39) is disposed upstream of the at least one first production device (6) when seen in the transport direction (35).

3. A corrugating machine according to claim 1, wherein the at least one detection device (60) is disposed between the at least one storage device (34) and the at least one second production device (61).

4. A corrugating machine according to claim 1, wherein the at least one marking device (39) is a piston-cylinder unit comprising a cylinder (42) and a piston (44) that is displaceable therein.

5. A corrugating machine according to claim 1, wherein the at least one detection device (60) has an optical detector (62).

6. A corrugating machine according to claim 4, wherein the at least one marking device (39) has at least one holder (45) for the coloring agent (41) that is present in solid form, the holder (45) being joined to the piston (44) so as to be displaceable relative to a support component (55).

7. A corrugating machine according to claim 4, wherein the at least one marking device (39) has at least one return element (52) that is designed such that the piston (44) is automatically returnable.

8. A method of producing corrugated cardboard comprising the steps:

a. providing at least three continuous webs of material (13, 21, 65) by means of at least three splicing devices (3, 4, 74);

b. producing at least one corrugated web (23) from at least one of the webs of material (21) by means of at least one corrugating device (5);

c. joining the at least one corrugated web (23) to at least another web of material (13) to form at least one web of single-faced corrugated cardboard (2) by means of at least one first production device (6);

d. applying at least one color mark (40) to at least one of the webs (2, 12, 21, 23) by means of at least one marking device (39), the at least one color marking (40) being applied by rubbing off a coloring agent (41) which is present in solid form;

e. temporarily storing the at least one marked web of corrugated cardboard (2) by means of at least one storage device (34);

f. detecting the at least one color mark (40) at least after temporary storage by means of at least one detection device (60);

g. determining a web length (L_B) of the at least one temporarily stored web of corrugated cardboard (2) by means of the at least one applied and detected color mark (40) in at least one electronic control device (86);

h. joining the at least one web of single-faced corrugated cardboard (2) to at least another web of material (65) to form at least one web of double-faced corrugated cardboard (66) by means of at least one second production device (61); and

i. cutting the at least one web of double-faced corrugated cardboard (66) in dependence of the determined web length (L_B) by means of at least one cross-cutting device (82).

9. A method according to claim 8, wherein the at least one color mark (40) is applied such that this color mark (40) is disposed in an edge area (56) of the at least one web of single-faced corrugated cardboard (2).

10. A method according to claim 8, wherein by means of the at least one control device (86), at least one of the splicing devices (3, 4, 74) is operated in dependence of the determined web length (L_B) such that at least two joining points (14, 22, 81) in at least two of the continuous webs of material (13, 21, 65) are disposed one above the other in a substantially congruent manner in the web of double-faced corrugated cardboard (66).