EP1459878A2 - corrugated board machine and manufacturing of corrugated board sheets - Google Patents

corrugated board machine and manufacturing of corrugated board sheets Download PDF

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Publication number
EP1459878A2
EP1459878A2 EP04005757A EP04005757A EP1459878A2 EP 1459878 A2 EP1459878 A2 EP 1459878A2 EP 04005757 A EP04005757 A EP 04005757A EP 04005757 A EP04005757 A EP 04005757A EP 1459878 A2 EP1459878 A2 EP 1459878A2
Authority
EP
European Patent Office
Prior art keywords
corrugated cardboard
web
printing
corrugated
webs
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP04005757A
Other languages
German (de)
French (fr)
Other versions
EP1459878A3 (en
EP1459878B1 (en
Inventor
Norbert Städele
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BHS Corrugated Maschinen und Anlagenbau GmbH
Original Assignee
BHS Corrugated Maschinen und Anlagenbau GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BHS Corrugated Maschinen und Anlagenbau GmbH filed Critical BHS Corrugated Maschinen und Anlagenbau GmbH
Publication of EP1459878A2 publication Critical patent/EP1459878A2/en
Publication of EP1459878A3 publication Critical patent/EP1459878A3/en
Application granted granted Critical
Publication of EP1459878B1 publication Critical patent/EP1459878B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20—Corrugating; Corrugating combined with laminating to other layers
    • B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
    • B31F1/26—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
    • B31F1/28—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
    • B31F1/2822—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard involving additional operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20—Corrugating; Corrugating combined with laminating to other layers
    • B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
    • B31F1/26—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
    • B31F1/28—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
    • B31F1/2813—Making corrugated cardboard of composite structure, e.g. comprising two or more corrugated layers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1025—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina to form undulated to corrugated sheet and securing to base with parts of shaped areas out of contact

Definitions

  • the invention relates to a corrugated cardboard system for producing corrugated cardboard sheets according to the preamble of claim 1 and a method for producing corrugated cardboard sheets with a corrugated cardboard system according to claim 9.
  • Corrugated cardboard plants for the production of single-sided laminated corrugated cardboard or multi-layer corrugated cardboard are e.g. B. from EP 0 687 552 B1.
  • Printed corrugated cardboard sheets are often required. Simple and flexible solutions are not yet known.
  • the core of the invention is the webs within a corrugated cardboard system, that is to say during the production of the corrugated cardboard and before the corrugated cardboard sheets are cut digitally printable.
  • print jobs can be distributed very flexibly, in particular precisely on the print image, on the web to be printed.
  • it is also possible to process small or very small print jobs since printing on the webs with different print patterns is possible without exchanging hardware components of the printing device.
  • the print patterns can also differ in different directions, in particular along and across the web conveying direction be printed scaled.
  • the material webs are printed as long as they are still present individually, that is not yet merged, within the corrugated cardboard system. This reduces the demands on the printing device, since material with a relatively low thickness can be processed.
  • the heating device When printing in front of a heating device, the heating device which is generally necessary anyway for the production of the corrugated cardboard automatically ensures that the printing on the material webs dries.
  • Printing on both sides further increases printing flexibility. It is possible to print on both sides with one printing unit or to work with two offset printing units, one printing unit printing on one side and the other printing unit printing on the other side.
  • the two-sided printing can take place on the merged corrugated cardboard web or else even beforehand, with two material webs which are subsequently merged to form the corrugated cardboard web each being printed on one side.
  • a corrugated cardboard system as is shown schematically in FIGS. 1 and 6, has a machine 1 for producing corrugated cardboard laminated on one side.
  • a first material web 3 is fed to the machine 1 from a first unrolling device 2.
  • the material webs are endless paper webs.
  • the material web 3 represents a base web for the corrugated cardboard produced in the machine 1.
  • FIG. 2 shows an enlarged side view of the first material web 3 in detail.
  • This has a material base layer 3a with a coating 3b, a so-called primer, which increases the print quality.
  • the thickness ratio between the base material layer 3a and the primer 3b is not shown to scale in FIG. In practice, the primer 3b is much thinner than the base material layer 3a than shown in FIG. 2.
  • the primer 3b does not necessarily have to be present on the rolled-up material web 3, but can also be applied to the material web 3 after it has been rolled off.
  • the first material web 3 runs through a first digital printing unit 4 with an ink jet print head 5, which prints the top of the first material web 3 in accordance with a print job.
  • the printing unit 4 is connected to a job control device 7 via a signal line 6.
  • the printed first material web 3 is brought together in the machine 1 with a second material web 8, which is unrolled by a second unrolling device 9.
  • the second material web 8 is carried out in the machine 1 to produce a corrugation between two corrugating rollers 10 arranged adjacent to one another.
  • the second material web 8 is in the form of a corrugated web 8.
  • the tips of the corrugated web 8 are then glued in a gluing device 11 and the corrugated web 8 in the machine 1 with the first material web 3 is pressed together in a nip between a pressure roller 12 and one of the corrugated rollers 10 and connected to one another.
  • the machine 1 thus represents a first production unit of a production device 42 for merging material webs to form a corrugated cardboard web. From the machine 1, a web of corrugated cardboard 13 laminated on one side is removed upwards and around a deflection roller 14 into a Direction of work 15 deflected.
  • the machine 1 for producing webs of corrugated cardboard laminated on one side is generally known, for example from EP 0 687 552 A (corresponds to US Pat. No. 5,632,850), DE 195 36 007 A (corresponds to GB 2,305,675 A) or DE 43 05 158 A1, what is referred to in the details.
  • FIG. 3 shows the material web 3 before it passes through a preheating device 16 in the further course of the working direction 15 after the deflection roller 14.
  • the first material web 3 has first marks 17 on the edge, which are equidistant line markings running transversely to the working direction 15 are executed. Two adjacent first marks 17 are at a distance a 1 from one another in front of the preheating device 16, as shown in FIG.
  • the first material web has strips with second marks 18 at regular intervals along the working direction 15, which are designed as equidistant short line marks parallel to the working direction 15. Two adjacent second marks 18 are at a distance b 1 from one another in front of the preheating device 16.
  • FIG. 3 shows the material web 3 before it passes through a preheating device 16 in the further course of the working direction 15 after the deflection roller 14.
  • the first material web 3 has first marks 17 on the edge, which are equidistant line markings running transversely to the working direction 15 are executed. Two adjacent first marks 17 are at a distance
  • FIG. 4 shows the material web 3 in a representation similar to FIG. 3 after the preheating device 16.
  • the distance between two adjacent first marks 17 is here with a 2 and the distance between two adjacent second marks 18 is with b 2 designated. Due to the shrinkage of the corrugated cardboard web 13 due to the heating in the preheating device 16 and the resulting changes in the dimensions of the material web 3, the following distance relationships apply: a 2 ⁇ a 1 and b 2 ⁇ b 1 .
  • the machine 1 is followed by a second rolling device 21 for a third material web 22 as a further cover web for the corrugated cardboard web 13 in the working direction 15.
  • the first material web 3 which represents the base web and the cover web which represents the cover web third material web 22 is suitably chosen paper webs. It is also partly customary to refer to the third material web 22 as a liner web, in which case the first material web 3 is then referred to as the cover web.
  • the material webs 3, 8 and 22 are unrolled at a speed of up to 400 m / min.
  • the third material web 22 is first deflected around a deflection roller 23 such that it is guided in the working direction 15. Subsequently, the third material web 22 is deflected through 180 ° by two further deflecting rollers 24, 25 such that its side facing downward between the deflecting rollers 23 and 24 now faces upward, the third material web 22 after the deflecting roller 25 opposing it the working direction 15 is performed. After the deflecting roller 25, the third material web 22 runs through a second printing unit 26, which together with the first printing unit 4 forms a digital printing device 27. The side of the third material web 22 facing upward after the deflecting roller 25 is printed in the printing unit 26 by an ink-jet print head 28 in accordance with a print job.
  • the third material web 22 likewise has a two-layer structure with a base material layer and a primer such that the primer layer of the third material web 22 is printed on by means of the ink jet print head 28 of the second printing unit 26.
  • the primer of the third material web 22 can also be brought up after unrolling and before the second printing unit 26.
  • the second printing unit 26 is connected to the job control device 7 via a signal line 29 for print job control.
  • the third material web 22 is again substantially reduced by means of two further deflecting rollers 30, 31 Deflected by 180 °, so that the third material web 22 is again conveyed essentially in the working direction 15 after the deflection roller 31.
  • the third material web 22 is also fed to the preheating device 16 after the deflection roller 31.
  • This has two heatable heating rollers 32 arranged one above the other.
  • the corrugated cardboard web 13 and the third material web 22 run one above the other and partially wrap around the respective heating rollers 32.
  • Behind the preheating device 16 there is a gluing unit 33 with a gluing roller 34 which is partially immersed in a glue bath 35.
  • the corrugated web 8 of the corrugated cardboard web 13 is in contact with the gluing roller 34.
  • a heating pressure device 36 is arranged behind the gluing unit 33 and has a horizontal table 37 with heating plates, which extends in the working direction 15. Above the table 37, a driven endless pressure belt 39 deflected by three rollers 38 is provided. A pressure gap 40 is formed between the pressure belt 39 and the table 37, through which the corrugated cardboard web 13 and the third material web 22 are guided and pressed against one another there.
  • a corresponding heating device 36 is known from DE 199 54 754 A1.
  • a three-ply corrugated cardboard web 41 is formed in the heating device 36.
  • the heating device 36 and the table 37 represent a second production unit of the production device 42 for bringing together material webs to form the corrugated cardboard web 41.
  • FIG. 5 shows two sections of the printed first material web 3 as part of the corrugated cardboard web 41 after exiting the heating device 36.
  • Various printing patterns 43 are shown, which e.g. B. for printing certain package or box sizes and types are required. As is shown by way of example in FIG. 5, the print patterns 43 can have different dimensions along the working direction 15, but also transversely thereto.
  • the print patterns 43 are e.g. B. to advertising prints, to work instructions z. B. in the form of templates for folding or cutting, number or date imprints or imprints that treat a certain production group (batch) of the goods to be packaged by means of the corrugated sheets 62, 67. This can be information that can be read in plain text or barcodes. Due to the possibilities of the digital printing device 27, the variation possibilities for the print patterns 43 are practically unlimited. It is conceivable, for. B. to design the print samples 43 so that they represent individual parts of an overall image, which arises by stacking the corrugated cardboard sheets 62, 67 having these individual print sample parts or the packaging produced from them.
  • FIG. 6 shows a second part of the corrugated cardboard system following the exit of the corrugated cardboard web 41 from the heating device 36.
  • a second reading device 44 is initially arranged at the upstream end of FIG.
  • the reading device 44 is connected to the job control device 7 via a signal line 45, which is shown interrupted in FIG.
  • the second reading device 44 detects the upper side of the material web 3 in the section which is shown in FIG. 4.
  • the second reading device 44 measures the distances a 2 , b 2 between adjacent first marks 17 and adjacent second marks 18.
  • a longitudinal cutting / creasing device 46 Arranged in the working direction 15 after the reading device 44 is a longitudinal cutting / creasing device 46, which consists of two creasing stations 47 arranged one behind the other and two longitudinal cutting stations 48 arranged one behind the other.
  • the creasing stations 47 each have paired creasing tools 49, between which the corrugated cardboard web 41 is carried out.
  • the slitting stations 48 each have knives 50 which can be driven in rotation and which can be brought into engagement with the corrugated cardboard web 41 for the longitudinal severing thereof.
  • the more precise structure of the slitter / scoring device 46 is known from DE 197 54 799 A (corresponds to US 6,071,222) and from DE 101 31 833 A, to which reference is hereby made for the detailed structure.
  • the upper cross-cutting roller pair 55 is followed by an upper conveyor belt 58, which is deflected around drivable rollers 59.
  • a tray 60 with a vertically running stop 61 is arranged behind the upper conveyor belt 58, on which corrugated cardboard sheets 62 cut from the web section 52 by means of the cross cutting device 54 are stacked to form a stack 63.
  • the tray 60 is, as indicated in FIG. 6 by a directional arrow 64, in the Adjustable height. In particular, the tray 60 can be lowered for the further transport of the stack 63 up to a machine base 65 which carries the corrugated cardboard system.
  • a further, lower conveyor belt 66 Downstream of the lower cross-cutting roller pair 56 is a further, lower conveyor belt 66 which stacks corrugated cardboard sheets 67, which were cut from the web section 53 by means of the cross-cutting device 54, on a further tray 68. To adapt to the height of the stack 63, the lower conveyor belt 66 can be raised, as indicated by an arrow 68a.
  • the two reading devices 19, 44 then detect the distances a 1 , b 1 and a 2 , b 2 of the marks 17 and 18.
  • the reading devices 19, 44 then pass this information on to the job control device 7.
  • a control computer of the order control device 7 determines a degree of longitudinal shrinkage of the material webs 3, 8, 22 in the working direction 15, ie a change in the track specifications in the longitudinal direction between the web in the area of the first printing unit 4 of the printing device 27 on the one hand (reading device 19) and the web before cutting the corrugated cardboard sheets 62, 67 on the other hand (reading device 44).
  • the job control device 7 determines scaling factors for the print pattern 43 to be applied by the printing units 4 and 26.
  • the printing units 4 and 26 therefore also print the printing pattern 43 such a size reservation that due to the predetermined shrinkage of the web, the desired size of the print pattern 43 on the web sections 52, 53 results.
  • the job control device 7 controls the slitting stations 48 on the one hand and the cross-cutting device 54 on the other hand via signal lines (not shown) in accordance with the specifications of the print jobs output by the job control device 7 to the printing devices 27.
  • the sides of the material webs 3, 22 to be printed can be printed by a suitable device, e.g. B. be cleaned by a compressed air blower. As an alternative to blowing off the sides of the material webs 3 and 22 to be printed, these sides can also be suctioned off. Finally, it is also possible to equip the material webs 3, 22 in such a way that they are antistatic, so that it is avoided that e.g. B. accumulates dust on the pages to be printed.
  • the material webs 3, 22 are preferably printed in an air-conditioned environment. The temperature is kept at a value which is less than 40 ° C. After printing on the material webs 3, 22, the printed pages can be sealed by applying an appropriate protective layer. Such sealing can take place before or after the corrugated cardboard sheets 62, 67 are cut to size.
  • FIG. 7 shows a second part of a corrugated cardboard system according to a second embodiment.
  • FIGS. 8 to 11 show further exemplary embodiments of corrugated cardboard plants. Components which correspond to those which have already been described with reference to FIGS. 1 to 6 have the same reference numerals and are not explained again in detail.
  • a further reading device 73 is arranged between the slitter / scoring device 46 and the cross cutter 54, which scans the web sections 52, 53 of the corrugated cardboard web in the working direction 15, that is to say longitudinally, in its detection area and thereby the distribution of pressure pattern 43 on the Corrugated cardboard web 41 recorded along the working direction 15.
  • the reading device 73 is connected to the cross-cutting device 54 via a signal line 74.
  • the reading device 73 controls the cross-cutting device 54 in such a way that the latter cuts the sheets of corrugated cardboard 62, 67 cuts according to the distribution of the print pattern along the working direction 15.
  • printing units corresponding to the printing units 4 or 26 of the first exemplary embodiment can also be provided for printing on individual webs of material in front of the machine 1 or the heating device 36.
  • the printing device 69 can be designed with two inkjet print heads in such a way that it prints the corrugated cardboard web 41 on both sides, that is to say simultaneously, on the top and bottom.
  • the second part of the third exemplary embodiment of the corrugated cardboard system shown in FIG. 9 corresponds to the second part of the corrugated cardboard system of the first exemplary embodiment shown in FIG. 6 with the difference that the reading device 44 of the first exemplary embodiment which contains both the brands 17 and the brands 18 evaluates their distance from one another, is functionally divided into a first reading device 75 for determining the distance between the marks 17 and a second reading device 76 for determining the distance between the marks 18.
  • the reading devices 75, 76 with the Control device of the corrugated cardboard system of the third embodiment connected.
  • Figures 10 and 11 show the two parts of a corrugated cardboard system of a fourth embodiment. These parts correspond to those of the third exemplary embodiment with the difference that in the fourth exemplary embodiment the corrugated cardboard web is not printed from above but from below. Therefore, the printing unit 4 is missing in the first part of the corrugated cardboard system of the fourth exemplary embodiment. However, there is the printing unit 26 corresponding to the first exemplary embodiment for printing on the underside of the third material web 22. Accordingly, the second part of the corrugated cardboard system of the fourth exemplary embodiment the reading devices 75, 76 are arranged underneath the corrugated cardboard web 41 in order to detect the printing patterns printed there by the printing unit 26.
  • the reading devices 19, 44, 70, 73, 75, 76 can also be designed as a camera, in particular as a CCD camera.
  • the reading device 19 also has the function of synchronizing the two printing units 4, 26 when a print that is exactly aligned on both sides is to take place on the corrugated cardboard web 41.
  • the reading device 19 detects the point in time at which a specific printing pattern 43 is present in the detection area of the reading device 19.
  • the job control device 7 calculates the time at which the Printing unit 26 has to print the third material web 22 in order to print it in the exact position for printing the opposite side of the corrugated cardboard web, that is to say the upper side of the corrugated cardboard web 13 printed by the printing unit 4.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Making Paper Articles (AREA)
  • Laminated Bodies (AREA)

Abstract

An assembly produces corrugated cardboard. The assembly has two or more roller stations (2, 9, 21), a corrugation station (10) and a cutting station. The assembly has a digital printing station (27) located between the roller and cutting stations.

Description

Die Erfindung betrifft eine Wellpappe-Anlage zur Herstellung von Wellpappe-Bögen nach dem Oberbegriff des Anspruchs 1 sowie ein Verfahren zur Herstellung von Wellpappe-Bögen mit einer Wellpappe-Anlage nach Anspruch 9.The invention relates to a corrugated cardboard system for producing corrugated cardboard sheets according to the preamble of claim 1 and a method for producing corrugated cardboard sheets with a corrugated cardboard system according to claim 9.

Wellpappe-Anlagen zur Herstellung einseitig kaschierter Wellpappe oder mehrlagiger Wellpappe sind z. B. aus der EP 0 687 552 B1 bekannt. Vielfach werden bedruckte Wellpappe-Bögen gefordert. Einfache und flexible Lösungen sind bisher nicht bekannt.Corrugated cardboard plants for the production of single-sided laminated corrugated cardboard or multi-layer corrugated cardboard are e.g. B. from EP 0 687 552 B1. Printed corrugated cardboard sheets are often required. Simple and flexible solutions are not yet known.

Es ist daher Aufgabe der vorliegenden Erfindung, eine Wellpappe-Anlage der eingangs genannten Art derart weiterzubilden, dass ein einfaches Bedrucken der Wellpappe insbesondere auch zur Bearbeitung von Klein- und Kleinst-Druckaufträgen möglich ist.It is therefore an object of the present invention to develop a corrugated cardboard system of the type mentioned at the outset in such a way that simple printing on the corrugated cardboard is possible, in particular also for processing small and very small print jobs.

Diese Aufgabe ist erfindungsgemäß gelöst durch eine Wellpappe-Anlage mit den Merkmalen des kennzeichnenden Teils des Anspruchs 1. Kern der Erfindung ist es, innerhalb einer Wellpappe-Anlage, also während der Produktion der Wellpappe und noch vor dem Zuschnitt der Wellpappe-Bögen, die Bahnen digital zu bedrucken. Hierbei können Druckaufträge sehr flexibel, insbesondere druckbildgenau, auf der zu bedruckenden Bahn verteilt werden. Insbesondere ist auch die Abarbeitung von Klein- oder Kleinst-Druckaufträgen möglich, da ein Bedrucken der Bahnen mit verschiedenen Druckmustern ohne Austausch von Hardware-Komponenten der Druckeinrichtung möglich ist. Die Druckmuster können zudem in verschiedenen Richtungen, insbesondere längs- und quer zur Bahn-Förderrichtung, unterschiedlich skaliert bedruckt werden. Eine einseitig kaschierte Wellpappe-Bahn kann schließlich auch auf ihrer Wellpappe-Bahnseite bedruckt werden, was mittels Druckwalzen nicht möglich ist. Ein nachträgliches Bedrucken der Wellpappe-Bögen oder ein Bedrucken von in der Wellpappe-Anlage bereitgestellten Materialrollen vor dem Betrieb der Wellpappe-Anlage entfällt.This object is achieved according to the invention by a corrugated cardboard system with the features of the characterizing part of claim 1. The core of the invention is the webs within a corrugated cardboard system, that is to say during the production of the corrugated cardboard and before the corrugated cardboard sheets are cut digitally printable. In this way, print jobs can be distributed very flexibly, in particular precisely on the print image, on the web to be printed. In particular, it is also possible to process small or very small print jobs, since printing on the webs with different print patterns is possible without exchanging hardware components of the printing device. The print patterns can also differ in different directions, in particular along and across the web conveying direction be printed scaled. Finally, a corrugated cardboard web laminated on one side can also be printed on its corrugated cardboard web side, which is not possible using pressure rollers. Subsequent printing of the corrugated cardboard sheets or printing on material rolls provided in the corrugated cardboard system is not required before the corrugated cardboard system is operated.

Bei einer Wellpappe-Anlage nach Anspruch 2 werden die Material-Bahnen bedruckt, solange sie noch innerhalb der Wellpappe-Anlage einzeln, also noch nicht zusammengeführt, vorliegen. Dies reduziert die Anforderungen an die Druck-Einrichtung, da Material mit relativ geringer Stärke verarbeitet werden kann.In a corrugated cardboard system according to claim 2, the material webs are printed as long as they are still present individually, that is not yet merged, within the corrugated cardboard system. This reduces the demands on the printing device, since material with a relatively low thickness can be processed.

Bei einem Druck vor einer Heizeinrichtung sorgt die für die Produktion der Wellpappe in der Regel sowieso notwendige Heizeinrichtung automatisch auch dafür, dass der Aufdruck auf den Material-Bahnen trocknet.When printing in front of a heating device, the heating device which is generally necessary anyway for the production of the corrugated cardboard automatically ensures that the printing on the material webs dries.

Ein beidseitiges Bedrucken erhöht die Druckflexibilität weiter. Es kann gleichzeitig mit einem Druckwerk beidseitig gedruckt werden oder aber mit zwei versetzten Druckwerken gearbeitet werden, wobei ein Druckwerk die eine Seite und das andere Druckwerk die andere Seite bedruckt. Der beidseitige Druck kann an der zusammengeführten Wellpappe-Bahn oder aber auch schon vorher erfolgen, wobei zwei Material-Bahnen, die anschließend zur Wellpappe-Bahn zusammengeführt werden, jeweils einseitig bedruckt werden.Printing on both sides further increases printing flexibility. It is possible to print on both sides with one printing unit or to work with two offset printing units, one printing unit printing on one side and the other printing unit printing on the other side. The two-sided printing can take place on the merged corrugated cardboard web or else even beforehand, with two material webs which are subsequently merged to form the corrugated cardboard web each being printed on one side.

Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den anderen Unteransprüchen.Further advantageous embodiments of the invention result from the other subclaims.

Mehrere Ausführungsbeispiele der Erfindung werden nachfolgend anhand der Zeichnung näher erläutert. In dieser zeigen:

Fig. 1
einen ersten Teil einer Wellpappe-Anlage gemäß einem ersten Ausführungsbeispiel,
Fig. 2
eine Ausschnittsvergrößerung von Fig. 1 im Bereich einer ersten Material-Bahn,
Fig. 3
eine Aufsicht auf einen Ausschnitt der ersten MaterialBahn im Bereich vor einer Heizeinrichtung im ersten Teil der Wellpappe-Anlage,
Fig. 4
eine Aufsicht eines Ausschnitts aus der ersten MaterialBahn nach der Heizeinrichtung im ersten Teil der Wellpappe-Anlage,
Fig. 5
eine Aufsicht auf Ausschnitte einer bedruckten Wellpappe-Bahn,
Fig. 6
einen zweiten Teil der Wellpappe-Anlage gemäß dem ersten Ausführungsbeispiel,
Fig. 7
einen zweiten Teil einer Wellpappe-Anlage gemäß einem zweiten Ausführungsbeispiel,
Fig. 8
einen ersten Teil einer Wellpappe-Anlage gemäß einem dritten Ausführungsbeispiel,
Fig. 9
einen zweiten Teil der Wellpappe-Anlage gemäß dem dritten Ausführungsbeispiel,
Fig. 10
einen ersten Teil einer Wellpappe-Anlage gemäß einem vierten Ausführungsbeispiel, und
Fig. 11
einen zweiten Teil der Wellpappe-Anlage gemäß dem vierten Ausführungsbeispiel.
Several exemplary embodiments of the invention are explained in more detail below with reference to the drawing. In this show:
Fig. 1
a first part of a corrugated cardboard system according to a first embodiment,
Fig. 2
1 in the area of a first material web,
Fig. 3
a view of a section of the first material web in the area in front of a heating device in the first part of the corrugated cardboard system,
Fig. 4
a view of a section of the first material web after the heating device in the first part of the corrugated cardboard plant,
Fig. 5
a view of sections of a printed corrugated sheet,
Fig. 6
a second part of the corrugated cardboard system according to the first embodiment,
Fig. 7
a second part of a corrugated cardboard plant according to a second embodiment,
Fig. 8
a first part of a corrugated cardboard plant according to a third embodiment,
Fig. 9
a second part of the corrugated cardboard system according to the third embodiment,
Fig. 10
a first part of a corrugated cardboard system according to a fourth embodiment, and
Fig. 11
a second part of the corrugated cardboard system according to the fourth embodiment.

Nachfolgend wird unter Bezugnahme auf die Figuren 1 bis 6 eine erste Ausführungsform der Erfindung beschrieben. Eine Wellpappe-Anlage, wie sie in den Figuren 1 und 6 schematisch dargestellt ist, weist eine Maschine 1 zur Herstellung einseitig kaschierter Wellpappe auf. Von einer ersten Abroll-Einrichtung 2 wird eine erste Material-Bahn 3 der Maschine 1 zugeführt. Bei den Material-Bahnen handelt es sich um endlose Papierbahnen. Die Material-Bahn 3 stellt eine Grundbahn für die in der Maschine 1 hergestellte Wellpappe dar. Figur 2 zeigt eine vergrößerte Seitenansicht der ersten Material-Bahn 3 im Detail. Diese weist eine Material-Grundschicht 3a mit einer die Druckqualität steigernden Beschichtung 3b, einem sogenannten Primer, auf. Das Dickenverhältnis zwischen der Grund-Materialschicht 3a und dem Primer 3b ist in Figur 2 nicht maßstabsgetreu wiedergegeben. In der Praxis ist der Primer 3b im Verhältnis zur Grund-Materialschicht 3a wesentlich dünner als in Figur 2 dargestellt. Der Primer 3b muss nicht zwingend schon auf der aufgerollten Material-Bahn 3 vorliegen, sondern kann nach dem Abrollen auch später noch auf die Material-Bahn 3 aufgebracht werden.A first embodiment of the invention is described below with reference to FIGS. 1 to 6. A corrugated cardboard system, as is shown schematically in FIGS. 1 and 6, has a machine 1 for producing corrugated cardboard laminated on one side. A first material web 3 is fed to the machine 1 from a first unrolling device 2. The material webs are endless paper webs. The material web 3 represents a base web for the corrugated cardboard produced in the machine 1. FIG. 2 shows an enlarged side view of the first material web 3 in detail. This has a material base layer 3a with a coating 3b, a so-called primer, which increases the print quality. The thickness ratio between the base material layer 3a and the primer 3b is not shown to scale in FIG. In practice, the primer 3b is much thinner than the base material layer 3a than shown in FIG. 2. The primer 3b does not necessarily have to be present on the rolled-up material web 3, but can also be applied to the material web 3 after it has been rolled off.

Zwischen der ersten Abroll-Einrichtung 2 und der Maschine 1 durchläuft die erste Material-Bahn 3 ein erstes Digital-Druckwerk 4 mit einem Tintenstrahl-Druckkopf 5, welcher nach Maßgabe eines Druckauftrags die Oberseite der ersten Material-Bahn 3 bedruckt. Das Druckwerk 4 steht über eine Signalleitung 6 mit einer Auftrags-Steuereinrichtung 7 in Verbindung.Between the first roll-off device 2 and the machine 1, the first material web 3 runs through a first digital printing unit 4 with an ink jet print head 5, which prints the top of the first material web 3 in accordance with a print job. The printing unit 4 is connected to a job control device 7 via a signal line 6.

Die bedruckte erste Material-Bahn 3 wird in der Maschine 1 mit einer zweiten Material-Bahn 8 zusammengeführt, die von einer zweiten Abroll-Einrichtung 9 abgerollt wird. Nach dem Abrollen wird die zweite Material-Bahn 8 in der Maschine 1 zur Erzeugung einer Wellung zwischen zwei benachbart zueinander angeordneten Riffelwalzen 10 durchgeführt. Die zweite Material-Bahn 8 liegt nach dieser Durchführung als Well-Bahn 8 vor. Anschließend werden die Spitzen der Well-Bahn 8 in einer Beleimungs-Einrichtung 11 beleimt und die Well-Bahn 8 in der Maschine 1 mit der ersten Material-Bahn 3 in einem Spalt zwischen einer Anpresswalze 12 und einer der Riffelwalzen 10 zusammengedrückt und miteinander verbunden. Die Maschine 1 stellt damit eine erste Produktions-Einheit einer Produktions-Einrichtung 42 zum Zusammenführen von Material-Bahnen zu einer Wellpappe-Bahn dar. Aus der Maschine 1 wird eine einseitig kaschierte Wellpappe-Bahn 13 nach oben abgeführt und um eine Umlenkwalze 14 in eine Arbeitsrichtung 15 umgelenkt. Die Maschine 1 zur Herstellung einseitig kaschierter Wellpappe-Bahnen ist allgemein bekannt, beispielsweise aus der EP 0 687 552 A (entspricht US-Patent 5,632,850), der DE 195 36 007 A (entspricht GB 2,305,675 A) oder der DE 43 05 158 A1, worauf bezüglich der Einzelheiten verwiesen wird.The printed first material web 3 is brought together in the machine 1 with a second material web 8, which is unrolled by a second unrolling device 9. After unrolling, the second material web 8 is carried out in the machine 1 to produce a corrugation between two corrugating rollers 10 arranged adjacent to one another. After this implementation, the second material web 8 is in the form of a corrugated web 8. The tips of the corrugated web 8 are then glued in a gluing device 11 and the corrugated web 8 in the machine 1 with the first material web 3 is pressed together in a nip between a pressure roller 12 and one of the corrugated rollers 10 and connected to one another. The machine 1 thus represents a first production unit of a production device 42 for merging material webs to form a corrugated cardboard web. From the machine 1, a web of corrugated cardboard 13 laminated on one side is removed upwards and around a deflection roller 14 into a Direction of work 15 deflected. The machine 1 for producing webs of corrugated cardboard laminated on one side is generally known, for example from EP 0 687 552 A (corresponds to US Pat. No. 5,632,850), DE 195 36 007 A (corresponds to GB 2,305,675 A) or DE 43 05 158 A1, what is referred to in the details.

Figuren 3 und 4 zeigen Ausschnitte aus der ersten Material-Bahn 3 in Auf sicht. Figur 3 zeigt die Material-Bahn 3, bevor diese im weiteren Verlauf der Arbeitsrichtung 15 nach der Umlenkwalze 14 eine Vorheiz-Einrichtung 16 durchtritt. Die erste Material-Bahn 3 weist randseitig erste Marken 17 auf, die als äquidistante, quer zur Arbeitsrichtung 15 verlaufende Strichmarkierungen ausgeführt sind. Jeweils zwei benachbarte erste Marken 17 weisen vor der Vorheiz-Einrichtung 16, wie in Figur 3 gezeigt, einen Abstand a1 zueinander auf. Weiterhin weist die erste Material-Bahn in regelmäßigen Abständen längs der Arbeitsrichtung 15 Streifen mit zweiten Marken 18 auf, die als äquidistante kurze Strichmarkierungen parallel zur Arbeitsrichtung 15 ausgeführt sind. Jeweils zwei benachbarte zweite Marken 18 weisen zueinander vor der Vorheiz-Einrichtung 16 einen Abstand b1 auf. Figur 4 zeigt die Material-Bahn 3 in einer zu Figur 3 ähnlichen Darstellung nach der Vorheiz-Einrichtung 16. Der Abstand zwischen jeweils zwei benachbarten ersten Marken 17 ist hier mit a2 und der Abstand zwischen jeweils zwei benachbarten zweiten Marken 18 ist mit b2 bezeichnet. Aufgrund der Schrumpfung der Wellpappe-Bahn 13 durch das Heizen in der Vorheiz-Einrichtung 16 und der dadurch sich ergebenden Änderungen der Abmessungen der Material-Bahn 3 gelten folgende Abstandsbeziehungen: a2< a1 sowie b2 < b1.Figures 3 and 4 show sections of the first material web 3 in up view. FIG. 3 shows the material web 3 before it passes through a preheating device 16 in the further course of the working direction 15 after the deflection roller 14. The first material web 3 has first marks 17 on the edge, which are equidistant line markings running transversely to the working direction 15 are executed. Two adjacent first marks 17 are at a distance a 1 from one another in front of the preheating device 16, as shown in FIG. Furthermore, the first material web has strips with second marks 18 at regular intervals along the working direction 15, which are designed as equidistant short line marks parallel to the working direction 15. Two adjacent second marks 18 are at a distance b 1 from one another in front of the preheating device 16. FIG. 4 shows the material web 3 in a representation similar to FIG. 3 after the preheating device 16. The distance between two adjacent first marks 17 is here with a 2 and the distance between two adjacent second marks 18 is with b 2 designated. Due to the shrinkage of the corrugated cardboard web 13 due to the heating in the preheating device 16 and the resulting changes in the dimensions of the material web 3, the following distance relationships apply: a 2 <a 1 and b 2 <b 1 .

Eine Leseeinrichtung 19, die oberhalb der Wellpappe-Bahn und damit oberhalb der die Marken 17, 18 tragenden Oberseite der ersten Material-Bahn 3 und zwischen der Umlenkwalze 14 und der Vorheiz-Einrichtung 16 angeordnet ist, bestimmt die Abstände a1 und b1 zwischen benachbarten Marken 17, 18. Die Leseeinrichtung 19 ist hierzu vergleichbar zu einem Barcode-Scanner ausgeführt. Über eine Signalleitung 20 steht die Leseeinrichtung 19 mit der Auftrags-Steuereinrichtung 7 in Verbindung.A reading device 19, which is arranged above the corrugated cardboard web and thus above the upper side of the first material web 3 bearing the marks 17, 18 and between the deflection roller 14 and the preheating device 16, determines the distances a 1 and b 1 between adjacent marks 17, 18. For this purpose, the reading device 19 is designed to be comparable to a barcode scanner. The reading device 19 is connected to the job control device 7 via a signal line 20.

Der Maschine 1 ist eine zweite Abroll-Einrichtung 21 für eine dritte Material-Bahn 22 als weitere Deckbahn für die Wellpappe-Bahn 13 in ArbeitsRichtung 15 nachgeordnet. Bei der Wellpappe-Bahn 8, der die Grundbahn darstellenden ersten Material-Bahn 3 und der die Deckbahn darstellenden dritten Material-Bahn 22 handelt es sich um geeignet gewählte Papierbahnen. Es ist auch zum Teil üblich, die dritte Material-Bahn 22 als Kaschierbahn zu bezeichnen, wobei in diesem Fall dann die erste Material-Bahn 3 als Deckbahn bezeichnet wird. Die Material-Bahnen 3, 8 und 22 werden mit einer Geschwindigkeit von bis zu 400 m/min abgerollt.The machine 1 is followed by a second rolling device 21 for a third material web 22 as a further cover web for the corrugated cardboard web 13 in the working direction 15. In the case of the corrugated cardboard web 8, the first material web 3 which represents the base web and the cover web which represents the cover web third material web 22 is suitably chosen paper webs. It is also partly customary to refer to the third material web 22 as a liner web, in which case the first material web 3 is then referred to as the cover web. The material webs 3, 8 and 22 are unrolled at a speed of up to 400 m / min.

Die dritte Material-Bahn 22 wird nach der zweiten Abroll-Einrichtung 21 zunächst um eine Umlenkwalze 23 so umgelenkt, dass sie in Arbeitsrichtung 15 geführt ist. Anschließend wird die dritte Material-Bahn 22 durch zwei weitere Umlenkwalze 24, 25 um 180° so umgelenkt, dass ihre zwischen den Umlenkwalzen 23 und 24 nach unten weisende Seite nun nach oben weist, wobei die dritte Material-Bahn 22 nach der Umlenkwalze 25 entgegen der Arbeitsrichtung 15 geführt wird. Nach der Umlenkwalze 25 durchläuft die dritte Material-Bahn 22 ein zweites Druckwerk 26, welches zusammen mit dem ersten Druckwerk 4 eine digitale Druckeinrichtung 27 bildet. Die nach der Umlenkwalze 25 nach oben weisende Seite der dritten Material-Bahn 22 wird im Druckwerk 26 von einem Tintenstrahl-Druckkopf 28 entsprechend einem Druckauftrag bedruckt. Die dritte Material-Bahn 22 weist ebenfalls einen zweischichtigen Aufbau mit einer Grund-Materialschicht und einem Primer derart auf, dass mittels des Tintenstrahl-Druckkopfs 28 des zweiten Druckwerks 26 die Primer-Schicht der dritten Material-Bahn 22 bedruckt wird. Auch der Primer der dritten Material-Bahn 22 kann nach dem Abrollen und vor dem zweiten Druckwerk 26 auf gebracht werden.After the second unrolling device 21, the third material web 22 is first deflected around a deflection roller 23 such that it is guided in the working direction 15. Subsequently, the third material web 22 is deflected through 180 ° by two further deflecting rollers 24, 25 such that its side facing downward between the deflecting rollers 23 and 24 now faces upward, the third material web 22 after the deflecting roller 25 opposing it the working direction 15 is performed. After the deflecting roller 25, the third material web 22 runs through a second printing unit 26, which together with the first printing unit 4 forms a digital printing device 27. The side of the third material web 22 facing upward after the deflecting roller 25 is printed in the printing unit 26 by an ink-jet print head 28 in accordance with a print job. The third material web 22 likewise has a two-layer structure with a base material layer and a primer such that the primer layer of the third material web 22 is printed on by means of the ink jet print head 28 of the second printing unit 26. The primer of the third material web 22 can also be brought up after unrolling and before the second printing unit 26.

Das zweite Druckwerk 26 steht zur Druckauftragssteuerung über eine Signalleitung 29 mit der Auftrags-Steuereinrichtung 7 in Verbindung. Nach dem Passieren des zweiten Druckwerks 26 wird die dritte Material-Bahn 22 mit Hilfe zweier weiterer Umlenkwalzen 30, 31 wieder um im Wesentlichen 180 ° umgelenkt, sodass die dritte Material-Bahn 22 nach der Umlenkwalze 31 wieder im Wesentlichen in Arbeitsrichtung 15 gefördert wird.The second printing unit 26 is connected to the job control device 7 via a signal line 29 for print job control. After passing through the second printing unit 26, the third material web 22 is again substantially reduced by means of two further deflecting rollers 30, 31 Deflected by 180 °, so that the third material web 22 is again conveyed essentially in the working direction 15 after the deflection roller 31.

Auch die dritte Material-Bahn 22 wird nach der Umlenkwalze 31 der Vorheiz-Einrichtung 16 zugeführt. Diese weist zwei übereinander angeordnete, beheizbare Heiz-Walzen 32 auf. Die Wellpappe-Bahn 13 und die dritte Material-Bahn 22 laufen übereinander und umschlingen teilweise die jeweiligen Heiz-Walzen 32. Hinter der Vorheiz-Einrichtung 16 ist ein Leimwerk 33 mit einer Beleimungs-Walze 34 angeordnet, die teilweise in ein Leimbad 35 eintaucht. Die Well-Bahn 8 der Wellepappe-Bahn 13 befindet sich in Kontakt mit der Beleimungs-Walze 34.The third material web 22 is also fed to the preheating device 16 after the deflection roller 31. This has two heatable heating rollers 32 arranged one above the other. The corrugated cardboard web 13 and the third material web 22 run one above the other and partially wrap around the respective heating rollers 32. Behind the preheating device 16 there is a gluing unit 33 with a gluing roller 34 which is partially immersed in a glue bath 35. The corrugated web 8 of the corrugated cardboard web 13 is in contact with the gluing roller 34.

Hinter dem Leimwerk 33 ist eine Heiz-Andrückvorrichtung 36 angeordnet, die einen horizontalen, sich in Arbeitsrichtung 15 erstreckenden Tisch 37 mit Heizplatten aufweist. Oberhalb des Tisches 37 ist ein über drei Walzen 38 umgelenkter, angetriebener endloser Andruck-Gurt 39 vorgesehen. Zwischen dem Andruck-Gurt 39 und dem Tisch 37 ist ein Anpressspalt 40 gebildet, durch den die Wellpappe-Bahn 13 und die dritte Material-Bahn 22 geführt sind und dort aneinander gedrückt werden. Eine entsprechende Heiz-Vorrichtung 36 ist aus der DE 199 54 754 A1 bekannt. In der Heiz-Vorrichtung 36 wird eine dreilagige Wellpappe-Bahn 41 gebildet. Die Heiz-Vorrichtung 36 und der Tisch 37 stellen eine zweite Produktions-Einheit der Produktions-Einrichtung 42 zum Zusammenführen von Material-Bahnen zu der Wellpappe-Bahn 41 dar.A heating pressure device 36 is arranged behind the gluing unit 33 and has a horizontal table 37 with heating plates, which extends in the working direction 15. Above the table 37, a driven endless pressure belt 39 deflected by three rollers 38 is provided. A pressure gap 40 is formed between the pressure belt 39 and the table 37, through which the corrugated cardboard web 13 and the third material web 22 are guided and pressed against one another there. A corresponding heating device 36 is known from DE 199 54 754 A1. A three-ply corrugated cardboard web 41 is formed in the heating device 36. The heating device 36 and the table 37 represent a second production unit of the production device 42 for bringing together material webs to form the corrugated cardboard web 41.

Figur 5 zeigt zwei Abschnitte der bedruckten ersten Material-Bahn 3 als Teil der Wellpappe-Bahn 41 nach dem Austritt aus der Heiz-Vorrichtung 36. Gezeigt sind verschiedene Druckmuster 43, die z. B. zur Bedruckung bestimmter Paket- oder Kartongrößen und -typen erforderlich sind. Die Druckmuster 43 können, wie dies in Figur 5 beispielhaft gezeigt ist, längs der Arbeitsrichtung 15, aber auch quer dazu, unterschiedliche Abmessungen haben.FIG. 5 shows two sections of the printed first material web 3 as part of the corrugated cardboard web 41 after exiting the heating device 36. Various printing patterns 43 are shown, which e.g. B. for printing certain package or box sizes and types are required. As is shown by way of example in FIG. 5, the print patterns 43 can have different dimensions along the working direction 15, but also transversely thereto.

Bei den Druckmustern 43 handelt es sich z. B. um Werbeaufdrucke, um Arbeitsanweisungen z. B. in Form von Schablonen zum Falzen oder Schneiden, um Nummer- oder Datumsaufdrucke oder auch um Aufdrucke, die eine bestimmte Produktionsgruppe (Batch) der mittels der Wellpappe-Bögen 62, 67 zu verpackenden Waren behandeln. Es kann sich hierbei um im Klartext lesbare Informationen oder auch um Barcodes handeln. Aufgrund der Möglichkeiten der digitalen Druckeinrichtung 27 sind die Variationsmöglichkeiten für die Druckmuster 43 praktisch unbegrenzt. Denkbar ist z. B., die Druckmuster 43 so zu gestalten, dass sie einzelne Teile eines Gesamtbildes darstellen, welches durch Aneinanderlagern der diese einzelnen Druckmuster-Teile aufweisenden Wellpappe-Bögen 62, 67 bzw. den aus diesen produzierten Verpackungen entsteht.The print patterns 43 are e.g. B. to advertising prints, to work instructions z. B. in the form of templates for folding or cutting, number or date imprints or imprints that treat a certain production group (batch) of the goods to be packaged by means of the corrugated sheets 62, 67. This can be information that can be read in plain text or barcodes. Due to the possibilities of the digital printing device 27, the variation possibilities for the print patterns 43 are practically unlimited. It is conceivable, for. B. to design the print samples 43 so that they represent individual parts of an overall image, which arises by stacking the corrugated cardboard sheets 62, 67 having these individual print sample parts or the packaging produced from them.

Figur 6 zeigt einen zweiten Teil der Wellpappe-Anlage im Anschluss an den Austritt der Wellpappe-Bahn 41 aus der Heiz-Vorrichtung 36. Oberhalb der Wellpappe-Bahn 41 ist am stromaufwärtigen Ende von Figur 6 zunächst eine zweite Leseeinrichtung 44 angeordnet. Die Leseeinrichtung 44 steht über eine Signalleitung 45, die in Figur 6 unterbrochen dargestellt ist, mit der Auftrags-Steuereinrichtung 7 in Verbindung. Die zweite Leseeinrichtung 44 erfasst die Oberseite der Material-Bahn 3 in dem Abschnitt, der in Figur 4 dargestellt ist. Die zweite Leseeinrichtung 44 misst die Abstände a2, b2 zwischen benachbarten ersten Marken 17 und benachbarten zweiten Marken 18.FIG. 6 shows a second part of the corrugated cardboard system following the exit of the corrugated cardboard web 41 from the heating device 36. Above the corrugated cardboard web 41, a second reading device 44 is initially arranged at the upstream end of FIG. The reading device 44 is connected to the job control device 7 via a signal line 45, which is shown interrupted in FIG. The second reading device 44 detects the upper side of the material web 3 in the section which is shown in FIG. 4. The second reading device 44 measures the distances a 2 , b 2 between adjacent first marks 17 and adjacent second marks 18.

In Arbeitsrichtung 15 nach der Leseeinrichtung 44 ist eine Längsschneide- /Rill-Einrichtung 46 angeordnet, die aus zwei hintereinander angeordneten Rill-Stationen 47 sowie zwei hintereinander angeordneten Längsschneide-Stationen 48 besteht. Die Rill-Stationen 47 weisen jeweils paarweise übereinander angeordnete Rillwerkzeuge 49 auf, zwischen denen die Wellpappe-Bahn 41 durchgeführt ist. Die Längsschneide-Stationen 48 weisen jeweils drehantreibbare Messer 50 auf, die mit der Wellpappe-Bahn 41 zur Längsdurchtrennung derselben in Eingriff bringbar sind. Der genauere Aufbau der Längsschneide-/Rill-Einrichtung 46 ist aus der DE 197 54 799 A (entspricht US 6,071,222) sowie aus der DE 101 31 833 A bekannt, auf die hiermit für den Detailaufbau verwiesen wird.Arranged in the working direction 15 after the reading device 44 is a longitudinal cutting / creasing device 46, which consists of two creasing stations 47 arranged one behind the other and two longitudinal cutting stations 48 arranged one behind the other. The creasing stations 47 each have paired creasing tools 49, between which the corrugated cardboard web 41 is carried out. The slitting stations 48 each have knives 50 which can be driven in rotation and which can be brought into engagement with the corrugated cardboard web 41 for the longitudinal severing thereof. The more precise structure of the slitter / scoring device 46 is known from DE 197 54 799 A (corresponds to US 6,071,222) and from DE 101 31 833 A, to which reference is hereby made for the detailed structure.

In Arbeitsrichtung 15 hinter der Längsschneide-/Rill-Einrichtung 46 ist eine Weiche 51 angeordnet, in der längsgeschnittene Bahnabschnitte 52, 53 der Wellpappe-Bahn 41 voneinander getrennt werden. Die Bahnabschnitte 52, 53 werden nachfolgend einer Querschneide-Einrichtung 54 zugeführt. Diese weist für den oberen Bahnabschnitt 52 ein oberes Querschneide-Walzenpaar 55 und für den unteren Bahnabschnitt 53 ein unteres Querschneide-Walzenpaar 56 auf. Die Walzen der Walzenpaare 55, 56 tragen jeweils einen sich radial nach außen erstreckenden und senkrecht zur Arbeitsrichtung 15 verlaufenden Messerbalken 57. Die Messerbalken 57 eines Querschneide-Walzenpaares 55, 56 wirken zur Querdurchtrennung der Bahnabschnitte 52, 53 zusammen. Dem oberen Querschneide-Walzenpaar 55 ist ein oberes Förderband 58 nachgeordnet, welches um drehantreibbare Walzen 59 umgelenkt wird. Hinter dem oberen Förderband 58 ist eine Ablage 60 mit vertikal verlaufendem Anschlag 61 angeordnet, auf der aus dem Bahnabschnitt 52 mittels der Querschneide-Einrichtung 54 geschnittene Wellpappe-Bögen 62 einen Stapel 63 bildend gestapelt werden. Die Ablage 60 ist, wie in Figur 6 durch einen Richtungspfeil 64 angedeutet, in der Höhe verstellbar. Insbesondere kann die Ablage 60 zum Weitertransport des Stapels 63 bis zu einem Maschinenboden 65, der die Wellpappe-Anlage trägt, abgesenkt werden.A switch 51 is arranged in the working direction 15 behind the longitudinal cutting / creasing device 46, in which longitudinally cut web sections 52, 53 of the corrugated cardboard web 41 are separated from one another. The web sections 52, 53 are subsequently fed to a cross cutting device 54. This has an upper cross-cutting roller pair 55 for the upper web section 52 and a lower cross-cutting roller pair 56 for the lower web section 53. The rollers of the roller pairs 55, 56 each carry a cutter bar 57 which extends radially outward and runs perpendicular to the working direction 15. The cutter bars 57 of a cross-cutting roller pair 55, 56 cooperate for the transverse cutting of the web sections 52, 53. The upper cross-cutting roller pair 55 is followed by an upper conveyor belt 58, which is deflected around drivable rollers 59. Arranged behind the upper conveyor belt 58 is a tray 60 with a vertically running stop 61, on which corrugated cardboard sheets 62 cut from the web section 52 by means of the cross cutting device 54 are stacked to form a stack 63. The tray 60 is, as indicated in FIG. 6 by a directional arrow 64, in the Adjustable height. In particular, the tray 60 can be lowered for the further transport of the stack 63 up to a machine base 65 which carries the corrugated cardboard system.

Dem unteren Querschneide-Walzenpaar 56 ist ein weiteres, unteres Förderband 66 nachgeordnet, das Wellpappe-Bögen 67, die mittels der Querschneide-Einrichtung 54 aus dem Bahnabschnitt 53 geschnitten wurden, auf einer weiteren Ablage 68 stapelt. Zur Anpassung an die Höhe des Stapels 63 kann das untere Förderband 66 angehoben werden, wie durch einen Richtungspfeil 68a angedeutet.Downstream of the lower cross-cutting roller pair 56 is a further, lower conveyor belt 66 which stacks corrugated cardboard sheets 67, which were cut from the web section 53 by means of the cross-cutting device 54, on a further tray 68. To adapt to the height of the stack 63, the lower conveyor belt 66 can be raised, as indicated by an arrow 68a.

Das Bedrucken der Wellpappe-Bahn 41 mit Druckmustern 43 geschieht folgendermaßen: Zunächst werden Material-Bahnen mit Primer-Schichten versehen und an den Abroll-Einrichtungen 2 und 21 bereitgestellt. Auf die Primer-Beschichtung kann jedoch auch verzichtet werden. An der Abroll-Einrichtung 9 wird dann eine unbeschichtete Material-Bahn bereitgestellt. Alternativ kann die Primer-Beschichtung auch unmittelbar vor den Druckwerken 4, 26 nach dem Abrollen der Material-Bahnen aufgebracht werden. Die Marken 17, 18 werden von dem Druckwerk 4 aufgebracht. Anschließend erfolgt ein Vorlauf der Wellpappe-Anlage, bei dem eine unbedruckte Wellpappe-Bahn 41 produziert wird. Dies geschieht solange, bis die produzierte Wellpappe-Bahn den Erfassungsbereich der zweiten Leseeinrichtung 44 erreicht hat. Die beiden Leseeinrichtungen 19, 44 erfassen sodann die Abstände a1, b1 sowie a2, b2 der Marken 17 und 18. Die Leseeinrichtungen 19, 44 geben diese Information dann an die Auftrags-Steuereinrichtung 7 weiter. Aus dem Verhältnis a2 / a1 der Abstände der Marken 17 vor und nach den Heiz-Vorrichtungen 16, 36 ermittelt ein Steuerrechner der Auftrags-Steuereinrichtung 7 einen Längsschrumpfungsgrad der Material-Bahnen 3, 8, 22 in Arbeitsrichtung 15, d. h. eine Änderung der Bahnabmessungen in Längsrichtung zwischen der Bahn im Bereich des ersten Druckwerks 4 der Druckeinrichtung 27 einerseits (Leseeinrichtung 19) und der Bahn vor dem Zuschnitt der Wellpappe-Bögen 62, 67 andererseits (Leseeinrichtung 44). Entsprechend wird über das Verhältnis der Abstände b1, b2 benachbarter Marken 18 im Bereich der Leseeinrichtung 19 einerseits und im Bereich der Leseeinrichtung 44 andererseits eine Querschrumpfung der Material-Bahnen 3, 8, 22 bestimmt. Auf die Bestimmung der Querschrumpfung und auf die zugehörigen Markierungen kann verzichtet werden. Die Abstandsparameter a1, a2, b1, b2 werden von den Leseeinrichtungen 19, 44 an die Auftrags-Steuereinrichtung 7 übermittelt.The printing of the corrugated cardboard web 41 with printing patterns 43 takes place as follows: First, material webs are provided with primer layers and made available at the unrolling devices 2 and 21. However, the primer coating can also be dispensed with. An uncoated material web is then provided on the unrolling device 9. Alternatively, the primer coating can also be applied directly in front of the printing units 4, 26 after the material webs have been rolled off. The marks 17, 18 are applied by the printing unit 4. The corrugated cardboard system is then preceded, in which an unprinted corrugated cardboard web 41 is produced. This continues until the web of corrugated cardboard produced has reached the detection area of the second reading device 44. The two reading devices 19, 44 then detect the distances a 1 , b 1 and a 2 , b 2 of the marks 17 and 18. The reading devices 19, 44 then pass this information on to the job control device 7. From the ratio a 2 / a 1 of the distances between the marks 17 before and after the heating devices 16, 36, a control computer of the order control device 7 determines a degree of longitudinal shrinkage of the material webs 3, 8, 22 in the working direction 15, ie a change in the track specifications in the longitudinal direction between the web in the area of the first printing unit 4 of the printing device 27 on the one hand (reading device 19) and the web before cutting the corrugated cardboard sheets 62, 67 on the other hand (reading device 44). Correspondingly, a transverse shrinkage of the material webs 3, 8, 22 is determined via the ratio of the distances b 1 , b 2 of adjacent marks 18 in the area of the reading device 19 on the one hand and in the area of the reading device 44 on the other hand. The determination of the transverse shrinkage and the associated markings can be dispensed with. The distance parameters a 1 , a 2 , b 1 , b 2 are transmitted from the reading devices 19, 44 to the job control device 7.

Aus dem von der Auftrags-Steuereinrichtung 7 bestimmten Schrumpfungsgraden der Wellpappe-Bahn 41 in Längs- und Querrichtung bestimmt die Auftrags-Steuereinrichtung 7 Skalierungsfaktoren für das von den Druckwerken 4 und 26 aufzubringende Druckmuster 43. Die Druckwerke 4 und 26 drucken also die Druckmuster 43 mit einem solchen Größenvorbehalt auf, dass sich aufgrund der vorbestimmten Schrumpfung der Bahn die gewünschte Größe der Druckmuster 43 auf den Bahnabschnitten 52, 53 ergibt. Gleichzeitig steuert die Auftrags-Steuereinrichtung 7 über nicht dargestellte Signalleitungen die Längsschneide-Stationen 48 einerseits und die Querschneide-Einrichtung 54 andererseits entsprechend den Vorgaben der von der Auftrags-Steuereinrichtung 7 an die Druckeinrichtungen 27 ausgegebenen Druckaufträge an. Die Wellpappe-Bögen 62, 67 werden also so geschnitten, dass sich die Druckmuster 43 an vorbestimmten Positionen der Wellpappe-Bögen 62, 67 befinden. Die von der Auftrags-Steuereinrichtung 7 an die Druckeinrichtung 27 weitergegebenen Druckaufträge können Klein- bzw. Kleinstserien für nur wenige Wellpappe-Bögen 62, 67 beinhalten. Entsprechend einer Änderung des Druckauftrags wird die Längsschneide-Station 48 von der Auftrags-Steuereinrichtung 7 angesteuert, sodass die Breite der Bahnabschnitte 52, 53 entsprechend geschnitten wird. Anstelle der dargestellten Querschneide-Einrichtung 54 mit Walzenpaaren 55, 56 kann eine dann ebenfalls von der Auftrags-Steuereinrichtung 7 entsprechend angesteuerte Querschneide-Einrichtung eingesetzt sein, die es ermöglicht, Wellpappe-Bögen unterschiedlicher Länge in Arbeitsrichtung 15 zu schneiden. Die Wellpappe-Bögen 62, 67 können dann vollkommen flexibel in ihrer Größe an die Form und Größe der Druckmuster 43 der jeweiligen Druckaufträge angepasst werden.From the degree of shrinkage of the corrugated cardboard web 41 in the longitudinal and transverse directions determined by the job control device 7, the job control device 7 determines scaling factors for the print pattern 43 to be applied by the printing units 4 and 26. The printing units 4 and 26 therefore also print the printing pattern 43 such a size reservation that due to the predetermined shrinkage of the web, the desired size of the print pattern 43 on the web sections 52, 53 results. At the same time, the job control device 7 controls the slitting stations 48 on the one hand and the cross-cutting device 54 on the other hand via signal lines (not shown) in accordance with the specifications of the print jobs output by the job control device 7 to the printing devices 27. The corrugated cardboard sheets 62, 67 are thus cut in such a way that the printed patterns 43 are located at predetermined positions of the corrugated cardboard sheets 62, 67. The print jobs forwarded from the job control device 7 to the printing device 27 can include small or very small series for only a few sheets of corrugated cardboard 62, 67. In accordance with a change in the print job, the slitting station 48 is controlled by the job control device 7, so that the width of the web sections 52, 53 is cut accordingly. Instead of the illustrated cross-cutting device 54 with pairs of rollers 55, 56, a cross-cutting device, which is also controlled accordingly by the job control device 7, can be used, which makes it possible to cut sheets of corrugated cardboard of different lengths in the working direction 15. The size of the corrugated cardboard sheets 62, 67 can then be adapted to the shape and size of the print samples 43 of the respective print jobs in a completely flexible manner.

Falls erforderlich, können die zu bedruckenden Seiten der Material-Bahnen 3, 22 vor dem Druck durch eine entsprechende Einrichtung, z. B. durch ein Druckluftbeläse, gereinigt werden. Alternativ zu einem Abblasen der zu bedruckenden Seiten der Material-Bahnen 3 und 22 kann auch ein Absaugen dieser Seiten erfolgen. Schließlich ist es auch möglich, die Material-Bahnen 3, 22 so auszurüsten, dass sie antistatisch sind, sodass vermieden wird, dass sich z. B. Staub an den zu bedruckenden Seiten anlagert. Bevorzugt findet das Bedrucken der Material-Bahnen 3, 22 in einer klimatisierten Umgebung statt. Dabei wird die Temperatur auf einen Wert gehalten, der geringer ist als 40° C. Nach dem Bedrucken der Material-Bahnen 3, 22 können die bedruckten Seiten von diesen durch Aufbringen einer entsprechenden Schutzschicht versiegelt werden. Eine derartige Versiegelung kann vor oder nach dem Zuschneiden der Wellpappe-Bögen 62, 67 erfolgen.If necessary, the sides of the material webs 3, 22 to be printed can be printed by a suitable device, e.g. B. be cleaned by a compressed air blower. As an alternative to blowing off the sides of the material webs 3 and 22 to be printed, these sides can also be suctioned off. Finally, it is also possible to equip the material webs 3, 22 in such a way that they are antistatic, so that it is avoided that e.g. B. accumulates dust on the pages to be printed. The material webs 3, 22 are preferably printed in an air-conditioned environment. The temperature is kept at a value which is less than 40 ° C. After printing on the material webs 3, 22, the printed pages can be sealed by applying an appropriate protective layer. Such sealing can take place before or after the corrugated cardboard sheets 62, 67 are cut to size.

Figur 7 zeigt einen zweiten Teil einer Wellpappe-Anlage gemäß einem zweiten Ausführungsbeispiel. Die Figuren 8 bis 11 zeigen weitere Ausführungsbeispiele von Wellpappe-Anlagen. Komponenten, die denjenigen entsprechen, die schon unter Bezugnahme auf die Figuren 1 bis 6 beschrieben wurden, tragen die gleichen Bezugszeichen und werden nicht nochmals im Einzelnen erläutert.Figure 7 shows a second part of a corrugated cardboard system according to a second embodiment. FIGS. 8 to 11 show further exemplary embodiments of corrugated cardboard plants. Components which correspond to those which have already been described with reference to FIGS. 1 to 6 have the same reference numerals and are not explained again in detail.

Bei der Wellpappe-Anlage gemäß dem zweiten Ausführungsbeispiel ist der Heiz-Vorrichtung (nicht dargestellt) eine digitale Druckeinrichtung 69 nachgeordnet. Da zwischen der Bedruckung der Wellpappe-Bahn 41 und der Ablage der zugeschnittenen Wellpappe-Bögen 62, 67 keine relevante Schrumpfung der Bahn mehr erfolgt, kann auf die Leseeinrichtungen 19, 44 des ersten Ausführungsbeispiels hier verzichtet werden.In the corrugated cardboard system according to the second exemplary embodiment, a digital printing device 69 is arranged downstream of the heating device (not shown). Since there is no relevant shrinkage of the web between the printing of the corrugated cardboard web 41 and the storage of the cut-out corrugated cardboard sheets 62, 67, the reading devices 19, 44 of the first exemplary embodiment can be dispensed with here.

Der Längsschneide-/Rill-Einrichtung 46 vorgelagert ist beim zweiten Ausführungsbeispiel eine Leseeinrichtung 70, welche die Wellpappe-Bahn 41 quer abscannt und die Verteilung von Druckmustern 43 auf der Wellpappe-Bahn 41 erkennt. Über Signalleitungen 71, 72 steht die Leseeinrichtung 70 mit den Längsschneide-Stationen 48 in Signalverbindung. Abhängig von der Mustererkennung der Druckmuster 43 durch die Leseeinrichtung 70 werden die Längsschneide-Stationen 48 so angesteuert, dass Bahnabschnitte 52, 53 mit der Druckmusterverteilung entsprechender Breite geschnitten werden.In the second exemplary embodiment, the longitudinal cutting / creasing device 46 is preceded by a reading device 70 which scans the corrugated cardboard web 41 transversely and detects the distribution of print patterns 43 on the corrugated cardboard web 41. The reading device 70 is in signal connection with the slitting stations 48 via signal lines 71, 72. Depending on the pattern recognition of the print pattern 43 by the reading device 70, the slitting stations 48 are controlled in such a way that web sections 52, 53 are cut with the print pattern distribution of corresponding width.

Zwischen der Längsschneide-/Rill-Einrichtung 46 und dem Querschneider 54 ist eine weitere Leseeinrichtung 73 angeordnet, welche in ihrem Erfassungsbereich die Bahnabschnitte 52, 53 der Wellpappe-Bahn in Arbeitsrichtung 15, also längs, abscannt und dabei die Verteilung von Druckmustem 43 auf der Wellpappe-Bahn 41 längs der Arbeitsrichtung 15 erfasst. Über eine Signalleitung 74 steht die Leseeinrichtung 73 mit der Querschneide-Einrichtung 54 in Verbindung. Entsprechend dem zum Längsschneiden der Wellpappe-Bahn 41 Ausgeführten steuert die Leseeinrichtung 73 die Querschneide-Einrichtung 54 so an, dass diese die Wellpappe-Bögen 62, 67 entsprechend der Druckmusterverteilung längs der Arbeitsrichtung 15 schneidet. Mit Hilfe der Leseeinrichtungen 70, 73 lässt sich somit eine in der Quer- und der Längsabmessung einzustellende Flächengestalt der Wellpappe-Bögen ermitteln und durch Ansteuerung der Längsschneide-Stationen 48 bzw. der Querschneide-Einrichtung 54 diese entsprechende Flächengestalt zuschneiden.A further reading device 73 is arranged between the slitter / scoring device 46 and the cross cutter 54, which scans the web sections 52, 53 of the corrugated cardboard web in the working direction 15, that is to say longitudinally, in its detection area and thereby the distribution of pressure pattern 43 on the Corrugated cardboard web 41 recorded along the working direction 15. The reading device 73 is connected to the cross-cutting device 54 via a signal line 74. Corresponding to what has been stated for the longitudinal cutting of the corrugated cardboard web 41, the reading device 73 controls the cross-cutting device 54 in such a way that the latter cuts the sheets of corrugated cardboard 62, 67 cuts according to the distribution of the print pattern along the working direction 15. With the aid of the reading devices 70, 73, a surface shape of the corrugated cardboard sheets to be set in the transverse and longitudinal dimensions can thus be determined and this corresponding surface shape can be cut by controlling the longitudinal cutting stations 48 or the transverse cutting device 54.

Zusätzlich zur Druckeinrichtung 69 können bei einer Variante des zweiten Ausführungsbeispiels auch noch Druckwerke entsprechend den Druckwerken 4 oder 26 des ersten Ausführungsbeispiels zum Bedrucken einzelner Material-Bahnen vor der Maschine 1 oder der Heiz-Vorrichtung 36 vorgesehen sein.In addition to the printing device 69, in a variant of the second exemplary embodiment, printing units corresponding to the printing units 4 or 26 of the first exemplary embodiment can also be provided for printing on individual webs of material in front of the machine 1 or the heating device 36.

Die Druckeinrichtung 69 kann in einer weiteren Variante des zweiten Ausführungsbeispiels so mit zwei Tintenstrahl-Druckköpfen ausgestaltet sein, dass sie die Wellpappe-Bahn 41 beidseitig, also gleichzeitig, auf der Oberund der Unterseite, bedruckt.In a further variant of the second exemplary embodiment, the printing device 69 can be designed with two inkjet print heads in such a way that it prints the corrugated cardboard web 41 on both sides, that is to say simultaneously, on the top and bottom.

Figuren 8 und 9 zeigen die beiden Teile einer Wellpappe-Anlage gemäß einem dritten Ausführungsbeispiel. Im in Figur 8 dargestellten ersten Teil der Wellpappe-Anlage fehlt im Vergleich zum ersten Ausführungsbeispiel das zweite Druckwerk 26. Zudem entfällt die daher nicht mehr erforderliche Umlenkung der dritten Material-Bahn durch die Umlenkwalzen 23, 24, 25, 30, 31. Ferner fehlt beim dritten Ausführungsbeispiel die erste Leseeinrichtung 19. Die Auftrags-Steuereinrichtung ist auch bei diesem Ausführungsbeispiel vorhanden, allerdings nicht dargestellt. Bei der Wellpappe-Anlage des dritten Ausführungsbeispiels wird eine erste Material-Bahn 3 bedruckt, die Marken 17, 18 mit einem anfänglichen Abstand aufweist, der vorgegeben ist und vor Beginn der Produktion der Wellpappe-Anlage in die Auftrags-Steuereinrichtung des dritten Ausführungsbeispiels eingegeben wurde. Daher kennt die Auftrags-Steuereinrichtung des dritten Ausführungsbeispiels die Abstände a1, b1, obwohl diese nicht durch eine Leseeinrichtung vermessen werden.Figures 8 and 9 show the two parts of a corrugated cardboard system according to a third embodiment. In the first part of the corrugated cardboard system shown in FIG. 8, the second printing unit 26 is missing compared to the first exemplary embodiment. In addition, the deflection of the third material web by the deflecting rollers 23, 24, 25, 30, 31, which is therefore no longer necessary, is also omitted in the third exemplary embodiment, the first reading device 19. The job control device is also present in this exemplary embodiment, but is not shown. In the corrugated cardboard system of the third exemplary embodiment, a first material web 3 is printed, which has marks 17, 18 with an initial spacing which is predetermined and before the production of the corrugated cardboard system in the job control device of the third embodiment was entered. The job control device of the third exemplary embodiment therefore knows the distances a 1 , b 1 , although these are not measured by a reading device.

Der in Figur 9 dargestellte zweite Teil des dritten Ausführungsbeispiels der Wellpappe-Anlage entspricht dem in Figur 6 gezeigten zweiten Teil der Wellpappe-Anlage des ersten Ausführungsbeispiels mit dem Unterschied, dass die Leseeinrichtung 44 des ersten Ausführungsbeispiels, welche sowohl die Marken 17 als auch die Marken 18 hinsichtlich ihres Abstandes zueinander auswertet, funktionsmäßig aufgeteilt ist in eine erste Leseeinrichtung 75 zur Bestimmung des Abstandes der Marken 17 und in eine zweite Leseeinrichtung 76 zur Bestimmung des Abstandes der Marken 18. Über nicht dargestellte Signalleitungen sind die Leseeinrichtungen 75, 76 mit der Auftrags-Steuereinrichtung der Wellpappe-Anlage des dritten Ausführungsbeispiels verbunden.The second part of the third exemplary embodiment of the corrugated cardboard system shown in FIG. 9 corresponds to the second part of the corrugated cardboard system of the first exemplary embodiment shown in FIG. 6 with the difference that the reading device 44 of the first exemplary embodiment which contains both the brands 17 and the brands 18 evaluates their distance from one another, is functionally divided into a first reading device 75 for determining the distance between the marks 17 and a second reading device 76 for determining the distance between the marks 18. The reading devices 75, 76 with the Control device of the corrugated cardboard system of the third embodiment connected.

Figuren 10 und 11 zeigen die beiden Teile einer Wellpappe-Anlage eines vierten Ausführungsbeispiels. Diese Teile entsprechen denjenigen des dritten Ausführungsbeispiels mit dem Unterschied, dass beim vierten Ausführungsbeispiel die Wellpappe-Bahn nicht von oben, sondern von unten bedruckt wird. Daher fehlt im ersten Teil der Wellpappe-Anlage des vierten Ausführungsbeispiels das Druckwerk 4. Allerdings findet sich dort das dem ersten Ausführungsbeispiel entsprechende Druckwerk 26 zur Bedruckung der Unterseite der dritten Material-Bahn 22. Entsprechend sind im zweiten Teil der Wellpappe-Anlage des vierten Ausführungsbeispiels die Leseeinrichtungen 75, 76 unterhalb der Wellpappe-Bahn 41 angeordnet, um dort die vom Druckwerk 26 aufgedruckten Druckmuster zu erfassen.Figures 10 and 11 show the two parts of a corrugated cardboard system of a fourth embodiment. These parts correspond to those of the third exemplary embodiment with the difference that in the fourth exemplary embodiment the corrugated cardboard web is not printed from above but from below. Therefore, the printing unit 4 is missing in the first part of the corrugated cardboard system of the fourth exemplary embodiment. However, there is the printing unit 26 corresponding to the first exemplary embodiment for printing on the underside of the third material web 22. Accordingly, the second part of the corrugated cardboard system of the fourth exemplary embodiment the reading devices 75, 76 are arranged underneath the corrugated cardboard web 41 in order to detect the printing patterns printed there by the printing unit 26.

Ansonsten entspricht das vierte Ausführungsbeispiel dem dritten Ausführungsbeispiel.Otherwise, the fourth embodiment corresponds to the third embodiment.

Die Leseeinrichtungen 19, 44, 70, 73, 75, 76 können auch als Kamera, insbesondere als CCD-Kamera, ausgebildet sein. Die Leseeinrichtung 19 hat neben der oben beschriebenen Funktion noch die Funktion des Synchronisierens der beiden Druckwerke 4, 26 dann, wenn auf der Wellpappe-Bahn 41 ein beidseitig exakt ausgerichteter Druck erfolgen soll. Hierzu erfasst die Leseeinrichtung 19 den Zeitpunkt, an dem ein bestimmtes Druckmuster 43 im Erfassungsbereich der Leseeinrichtung 19 vorliegt. Abhängig von der Differenz der Förderwege der Wellpappe-Bahn 13 von der Leseeinrichtung 19 bis hin zum Anpressspalt 40 einerseits und der dritten Material-Bahn 22 vom Tintenstrahl-Druckkopf 28 hin zum Anpressspalt 40 andererseits errechnet die Auftrags-Steuereinrichtung 7 den Zeitpunkt, an dem das Druckwerk 26 die dritte Material-Bahn 22 zu bedrucken hat, um diese positionsgenau zur Bedruckung der Gegenseite der Wellpappe-Bahn, also der vom Druckwerk 4 bedruckten Oberseite der Wellpappe-Bahn 13 zu bedrucken.The reading devices 19, 44, 70, 73, 75, 76 can also be designed as a camera, in particular as a CCD camera. In addition to the function described above, the reading device 19 also has the function of synchronizing the two printing units 4, 26 when a print that is exactly aligned on both sides is to take place on the corrugated cardboard web 41. For this purpose, the reading device 19 detects the point in time at which a specific printing pattern 43 is present in the detection area of the reading device 19. Depending on the difference in the conveying paths of the corrugated cardboard web 13 from the reading device 19 to the press nip 40 on the one hand and the third material web 22 from the ink jet print head 28 to the press nip 40 on the other hand, the job control device 7 calculates the time at which the Printing unit 26 has to print the third material web 22 in order to print it in the exact position for printing the opposite side of the corrugated cardboard web, that is to say the upper side of the corrugated cardboard web 13 printed by the printing unit 4.

Claims (11)

Wellpappe-Anlage zur Herstellung von Wellpappe-Bögen (62, 67) a) mit mindestens zwei Abroll-Einrichtungen (2, 9, 21) zum Abrollen von Material-Bahnen (3, 8, 22) von Materialrollen, b) mit mindestens einer Riffel-Einrichtung (10) zur Herstellung von mindestens einer Well-Bahn (8) aus einer der Material-Bahnen, c) mit mindestens einer Produktions-Einrichtung (1, 36, 37) zum Verbinden der Well-Bahn (8) mit mindestens der einen weiteren Material-Bahn (3, 22) zu einer Wellpappe-Bahn (41), d) mit einer Schneid-Einrichtung (48, 54) zum Zuschneiden der Wellpappe-Bögen (62, 67) aus der Wellpappe-Bahn (41), dadurch gekennzeichnet, dass - zwischen den Abroll-Einrichtungen (2, 9, 21) und der Schneid-Einrichtung (48, 54) mindestens eine Digital-Druck-Einrichtung (27; 69) zum Bedrucken von mindestens einer der Bahnen (3, 22; 41; 3; 22) angeordnet ist. Corrugated cardboard plant for the production of corrugated cardboard sheets (62, 67) a) with at least two unrolling devices (2, 9, 21) for unrolling material webs (3, 8, 22) from material rolls, b) with at least one corrugated device (10) for producing at least one corrugated sheet (8) from one of the material sheets, c) with at least one production device (1, 36, 37) for connecting the corrugated web (8) with at least one further material web (3, 22) to form a corrugated cardboard web (41), d) with a cutting device (48, 54) for cutting the corrugated cardboard sheets (62, 67) from the corrugated cardboard web (41), characterized in that - At least one digital printing device (27; 69) between the rolling devices (2, 9, 21) and the cutting device (48, 54) for printing on at least one of the webs (3, 22; 41; 3 ; 22) is arranged. Wellpappe-Anlage nach Anspruch 1, dadurch gekennzeichnet, dass die Druck-Einrichtung (27) in Produktions-Richtung vor der Produktions-Einrichtung (1, 36, 37) angeordnet ist.Corrugated cardboard plant according to claim 1, characterized in that the printing device (27) is arranged in the production direction in front of the production device (1, 36, 37). Wellpappe-Anlage nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass mindestens eine Heiz-Einrichtung (16, 36) zum Heizen der Well-Bahn (8) und der mindestens einen weiteren Material-Bahn (3, 22) vor der mindestens einen Produktions-Einrichtung (1, 36, 37) vorgesehen ist, wobei die Druck-Einrichtung (4, 26) vor der Heiz-Einrichtung (16, 36) angeordnet ist.Corrugated cardboard plant according to claim 1 or 2, characterized in that at least one heating device (16, 36) for heating the corrugated web (8) and the at least one further material web (3, 22) before the at least one production - Device (1, 36, 37) is provided, wherein the printing device (4, 26) is arranged in front of the heating device (16, 36). Wellpappe-Anlage nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass mindestens eine Druck-Einrichtung (69) nach der Produktions-Einrichtung (1, 36, 37) angeordnet ist.Corrugated cardboard system according to one of claims 1 to 3, characterized in that at least one printing device (69) is arranged after the production device (1, 36, 37). Wellpappe-Anlage nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Druck-Einrichtung (27; 69) derart ausgeführt ist, dass ein einseitiges Bedrucken von mindestens einer der Bahnen (3, 22; 41) erfolgt.Corrugated cardboard system according to one of Claims 1 to 4, characterized in that the printing device (27; 69) is designed in such a way that at least one of the webs (3, 22; 41) is printed on one side. Wellpappe-Anlage nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Druck-Einrichtung (27; 69) derart ausgeführt ist, dass ein beidseitiges Bedrucken von mindestens einer der Bahnen (41) erfolgt.Corrugated cardboard system according to one of Claims 1 to 4, characterized in that the printing device (27; 69) is designed such that printing on at least one of the webs (41) takes place on both sides. Wellpappe-Anlage nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass mindestens eine mit der Druck-Einrichtung (27) in Signalverbindung stehende Mess-Einrichtung (19, 44; 19, 75, 76; 44; 75, 76) vorgesehen ist, die derart ausgeführt ist, dass sie Marken (17, 18) auf mindestens einer der Material-Bahnen (3) erfasst und aus dem erfassten Signal eine Änderung der Bahnabmessungen zwischen der Bahn (3) bei der Druck-Einrichtung (27) und der Bahn (3) vor der Quer-Schneid-Einrichtung (48, 54) zum Zuschnitt der Wellpappe-Bögen (62, 67) zumindest in der Bahnabmessung längs der Bahn (3) bestimmt.Corrugated cardboard system according to one of Claims 1 to 6, characterized in that at least one measuring device (19, 44; 19, 75, 76; 44; 75, 76) which is in signal connection with the printing device (27) is provided which is designed in such a way that it detects marks (17, 18) on at least one of the material webs (3) and uses the detected signal to change the web dimensions between the web (3) at the printing device (27) and the Web (3) in front of the cross-cutting device (48, 54) for cutting the corrugated cardboard sheets (62, 67) at least in the web dimension along the web (3). Wellpappe-Anlage nach Anspruch 7, dadurch gekennzeichnet, dass zwei Mess-Einrichtungen (19, 44) zur Erfassung der Änderung der Bahnabmessungen vorgesehen sind, wobei eine der Mess-Einrichtungen (19) bei der Druck-Einrichtung (27) und die andere Mess-Einrichtung (44) im Bereich vor der Schneid-Einrichtung (48, 54) angeordnet ist.Corrugated cardboard system according to claim 7, characterized in that two measuring devices (19, 44) are provided for detecting the change in the web dimensions, one of the measuring devices (19) in the printing device (27) and the other measuring device - Device (44) is arranged in the area in front of the cutting device (48, 54). Verfahren zur Herstellung von Wellpappe-Bögen mit einer Wellpappe-Anlage umfassend die folgenden Schritte: a) Bereitstellen einer Wellpappe-Anlage, welche aufweist mindestens zwei Abroll-Einrichtungen zum Abrollen von endlosen Material-Bahnen sowie mindestens eine Produktions-Einrichtung zur Erzeugung mindestens einer Wellpappe-Bahn aus den Material-Bahnen, b) digitales Bedrucken mindestens einer Material-Bahn in der Wellpappe-Anlage, und c) Zuschneiden von Wellpappe-Bögen aus der digital bedruckten Wellpappe-Bahn entsprechend der Form und Größe der aufgedruckten digitalen Druckmuster. Process for the production of corrugated cardboard sheets with a corrugated cardboard plant comprising the following steps: a) provision of a corrugated cardboard plant which has at least two unwinding devices for unrolling endless material webs and at least one production device for producing at least one corrugated cardboard web from the material webs, b) digital printing of at least one material web in the corrugated cardboard system, and c) Cutting corrugated cardboard sheets from the digitally printed corrugated cardboard web in accordance with the shape and size of the printed digital print samples. Verfahren gemäß Anspruch 9, dadurch gekennzeichnet, dass zwei Material-Bahnen vor ihrer Verbindung zu einer Wellpappe-Bahn miteinander digital bedruckt werden.A method according to claim 9, characterized in that two material webs are digitally printed together before they are connected to form a corrugated cardboard web. Verfahren gemäß Anspruch 9, dadurch gekennzeichnet, dass mindestens eine Material-Bahn digital bedruckt wird, nachdem diese mit mindestens einer zweiten Material-Bahn unter Bildung einer Wellpappe-Bahn verbunden worden ist.A method according to claim 9, characterized in that at least one material web is digitally printed after it has been connected to at least a second material web to form a corrugated cardboard web.
EP04005757A 2003-03-21 2004-03-11 Corrugated board machine and manufacturing of corrugated board sheets Expired - Lifetime EP1459878B1 (en)

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CN1532047A (en) 2004-09-29
DE10312600A1 (en) 2004-10-07
EP1459878A3 (en) 2005-10-12
DE502004011351D1 (en) 2010-08-19
EP1459878B1 (en) 2010-07-07
US20040182503A1 (en) 2004-09-23

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