DE102017001946A1 - Web tension decoupling device - Google Patents

Web tension decoupling device Download PDF

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Publication number
DE102017001946A1
DE102017001946A1 DE102017001946.0A DE102017001946A DE102017001946A1 DE 102017001946 A1 DE102017001946 A1 DE 102017001946A1 DE 102017001946 A DE102017001946 A DE 102017001946A DE 102017001946 A1 DE102017001946 A1 DE 102017001946A1
Authority
DE
Germany
Prior art keywords
web
paper
web tension
printing unit
digital printing
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.)
Withdrawn
Application number
DE102017001946.0A
Other languages
German (de)
Inventor
Felix Titz
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.)
RSD - Industrietechnik GmbH
Rsd Ind GmbH
Original Assignee
RSD - Industrietechnik GmbH
Rsd Ind 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 RSD - Industrietechnik GmbH, Rsd Ind GmbH filed Critical RSD - Industrietechnik GmbH
Priority to DE102017001946.0A priority Critical patent/DE102017001946A1/en
Publication of DE102017001946A1 publication Critical patent/DE102017001946A1/en
Withdrawn legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J15/00Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers, thermal printers, specially adapted for supporting or handling copy material in continuous form, e.g. webs
    • B41J15/16Means for tensioning or winding the web
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING 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
    • B31FMECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20Corrugating; Corrugating combined with laminating to other layers
    • B31F1/24Making webs in which the channel of each corrugation is transverse to the web feed
    • B31F1/26Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
    • B31F1/28Making 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
    • B31F1/2831Control
    • B31F1/2836Guiding, e.g. edge alignment; Tensioning
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00Handled material; Storage means
    • B65H2701/10Handled articles or webs
    • B65H2701/17Nature of material
    • B65H2701/176Cardboard
    • B65H2701/1762Corrugated

Abstract

Plant for the production of corrugated cardboard with an integrated digital printing unit 9 for printing smooth paper webs 2, characterized in that the web tension of the paper web is decoupled in the digital printing unit of the web tension of the paper web in the corrugator.

Description

  • From the EP 0 387 552 B1 is a corrugator known for the production of corrugated board.
  • From the DE 103 12 601 A1 is a digital printing device in a corrugator known.
  • In order to achieve high print quality, it is necessary to print on the smooth web. This digital printing device is preferably used between the paper web dispenser and a preheater. The preferred installation location is after the Kaschierbahnabroller 21st 1 ,
  • Another in the DE 103 12 601 A1 8th mentioned location is between the cover sheet dispenser 2 and the single-sided machine. 1
  • From the DE 10 2014 013 370 A1 It is known that, among other things, the web tension of the digitally printed web is of great importance in order to achieve high print quality.
  • task
  • For the production process of corrugated cardboard web tension is required so that the paper webs is intimately connected to the preheater and thus can absorb the necessary temperature and also a straight flat sheet can be produced. This web tension is applied between the dispenser and the heating section by means of brakes attached to the dispenser. A web tension control is from the DE 43 12 534 A1 known, but which does not produce the required accuracy. As is known, web tension fluctuations of up to 300% occur in the production process of corrugated board. As a result, the position of the web to be printed on the successively arranged printing devices of the printing unit no longer match. Thus, a high print quality is no longer given what leads to rejects.
  • Constant web tension influencing variables can once with the in the DE 100 2014 013 370 A1 be compensated in advance, or with the in DE 103 12 601 A1 mentioned measuring devices are subsequently corrected. However, this creates rejects, since the control of the printed image of the printing unit is locally downstream due to production.
  • Web tension fluctuations occur e.g. through non-circular paper rolls.
  • When Splice, connecting an empty role with a full role, occur web tension fluctuations.
  • Web tension fluctuations occur by accelerating or decelerating the corrugator.
  • Web tension variation occurs by stretching and contraction from the heated bed belt.
  • As a result of these web tension fluctuations, which inevitably occur in the process for the production of corrugated cardboard, an enormous amount of waste occurs in the digital printing of a paper web, since these fluctuations can not be compensated, since they occur repeatedly for a short time.
  • The object of the invention has been found to integrate a digital printing device in a corrugated board so that web tension fluctuations that inevitably occur in the process of producing corrugated board, have no effect on the print quality.
  • This is achieved by the fact that before and after the digital printing device, a device is used which decouples the web tension between the corrugator and the printing device.
  • Several embodiments of the invention are explained below with reference to the drawing. In this show:
  • list of figures
    • 1 a schematic representation of a unwinder with a splicer, not shown, the first web tension decoupling device, the digital printing unit, a second web tension decoupling device and a preheater. For the description of the other components of the corrugated cardboard plant is on the DE 103 12 601 A1 directed.
    • 2 a second embodiment of the invention. Components that correspond to those already referring to the 1 have been described bear the same reference numerals and will not be explained again in detail.
  • The following is with reference to the 1 a first embodiment of the invention described. The 1 schematically shows a dispenser 1 on which the paper web 2 is rolled off. The paper web is then glued later with the unilateral web, not shown. The paper web is via the splicer, not shown 3 to a towing device 4 guided. This drawbar consists of a driven pair of rollers and pulls the web from the dispenser 1 from. The drawbar 4 can also consist of a driven vacuum belt. After that, the paper web 2 in a slack 5 placed. Downstream then followed by a driven brake roller pair 6 , This brake roller pair 6 can also be from one of the paper web 2 wrapped driven brake roller or turn consist of a driven vacuum brake band. The slack 5 is by means of a distance sensor 7 measured and thus the drive from the drawbar 4 controlled. Thus, the paper web 2 in the slack 5 bahnspannungslos. Further downstream is the paper web 2 via a guide roller 8th into the digital printing unit 9 initiated. By means of the print heads shown schematically 10 becomes the paper web 2 digitally printed. The paper web is over deflection rollers 11 and 12 fed to the second web tension decoupling device. This consists of a driven Zugwalzenpaar 13 which the paper web 2 through the digital printing unit 9 pulls with constant web tension. This Zugwalzenpaar 13 can also consist of a driven vacuum belt. After that, the paper web 2 in a slack 14 placed. Downstream followed by a driven brake roller pair 15 , which is the tension in the paper web necessary for the production process for the production of corrugated board 2 provides. This driven pair of brake rollers 15 may in turn consist of a single looped driven brake roller or from a driven brake vacuum belt. To detect the sag, a distance sensor 16 used, which detects the slack and the drive from the Zugwalzenpaar 13 regulates. Thus, the paper web 2 is sagging 14 bahnspannungslos. After the pair of brake rollers 15, the paper web with the web tension necessary for the production process becomes the preheater 18 fed over deflection roller 17. This web tension decoupling device, consisting essentially of the Zugwalzenpaar 4 , the slack 5 , the brake roller pair 6 , the distance sensor 7 , the Zugwalzenpaar 13 , the slack 14 , the brake roller pair 15 and the distance sensor 16 can also be like in DE 103 12 601 A1 in 8th illustrated printing unit 4 between the dispenser 2 and the one-sided machine 1 be used.
  • In the web tension decoupling device in 2 will replace the slack 5 and the slack 14 loops 19 and loops 20 generated. To control the loops 19 and the loops 20 become the sensors 7 and 16 used, which drives the pull rollers 4 and 13 Taxes. Instead of the sensors 7 and 16 can also be a path measurement of the paper web 2 between Zugwalzenpaar 4 respectively. 13 and brake roller pair 6 respectively. 15 from which then the loops are calculated so that there are always loops. By this loop formation, a decoupling of the web tension in the printing unit is given by the web tension of the corrugator.
  • QUOTES INCLUDE IN THE DESCRIPTION
  • This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
  • Cited patent literature
    • EP 0387552 B1 [0001]
    • DE 10312601 A1 [0002, 0004, 0007, 0015, 0016]
    • DE 102014013370 A1 [0005]
    • DE 4312534 A1 [0006]
    • DE 1002014013370 A1 [0007]

Claims (6)

  1. Plant for the production of corrugated cardboard with an integrated digital printing unit 9 for printing smooth paper webs 2, characterized in that the web tension of the paper web is decoupled in the digital printing unit of the web tension of the paper web in the corrugator.
  2. Plant for the production of corrugated cardboard Claim 1 , characterized in that only the voltage of the incoming into the digital printing unit 9 web is decoupled.
  3. Plant after Claim 1 , characterized in that only the voltage of the expiring from the digital printing unit web is decoupled.
  4. Installation according to one of the preceding claims, characterized in that the web tension decoupling takes place by means of sag 5 or 14.
  5. Installation according to one of the preceding claims, characterized in that the web tension decoupling takes place by means of loops 19 and 20, respectively.
  6. Process for the production of digitally printed paper webs in a corrugated cardboard plant With at least one unwinding device 1 for unrolling the paper web 2 - With a pulling device 4, which pulls the paper from the paper roll - With a web tension-free area 5 or 19 - With a braking device 6, which applies the necessary for printing web tension - With a digital printing device 9, which applies the print image on the paper web 2 by means of print heads 10 - With a traction device 13, which promotes the paper web 2 through the printing unit - With a trackless space 14 and 20 respectively - With a braking device 15, which applies the web tension required for corrugated board production.
DE102017001946.0A 2017-02-28 2017-02-28 Web tension decoupling device Withdrawn DE102017001946A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE102017001946.0A DE102017001946A1 (en) 2017-02-28 2017-02-28 Web tension decoupling device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017001946.0A DE102017001946A1 (en) 2017-02-28 2017-02-28 Web tension decoupling device

Publications (1)

Publication Number Publication Date
DE102017001946A1 true DE102017001946A1 (en) 2018-08-30

Family

ID=63112233

Family Applications (1)

Application Number Title Priority Date Filing Date
DE102017001946.0A Withdrawn DE102017001946A1 (en) 2017-02-28 2017-02-28 Web tension decoupling device

Country Status (1)

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DE (1) DE102017001946A1 (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3152105A1 (en) 1980-06-16 1982-08-12 Larsson Mek Verkstad Ab Device at printing plants for providing a web with information
DE4312534A1 (en) 1993-04-16 1995-01-05 Bhs Corr Masch & Anlagenbau Device for regulating the web tension regulation of a material web, especially of a paper web
US6520080B1 (en) 2000-12-15 2003-02-18 Roll Systems, Inc. System and method for utilizing web from a roll having splices
DE10312601A1 (en) 2003-03-21 2004-09-30 Bhs Corrugated Maschinen- Und Anlagenbau Gmbh Material web and process for the production of corrugated cardboard
WO2004103705A1 (en) 2003-05-23 2004-12-02 Ebe Hesterman Method and device for the indirect digital printing of images on webs
DE102012002724A1 (en) 2012-02-10 2013-08-14 Robert Bosch Gmbh Method for regulating web tension in processing machine used for processing product web e.g. shaftless printing press, involves delaying effect of regulation output value on actuating command for second actuator by delay time
DE102013202871A1 (en) 2013-02-21 2014-09-04 Bhs Corrugated Maschinen- Und Anlagenbau Gmbh Material error detection device
DE102014013370A1 (en) 2014-09-09 2016-03-10 Heidelberger Druckmaschinen Ag Method for compensating local registration inaccuracies

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3152105A1 (en) 1980-06-16 1982-08-12 Larsson Mek Verkstad Ab Device at printing plants for providing a web with information
DE4312534A1 (en) 1993-04-16 1995-01-05 Bhs Corr Masch & Anlagenbau Device for regulating the web tension regulation of a material web, especially of a paper web
US6520080B1 (en) 2000-12-15 2003-02-18 Roll Systems, Inc. System and method for utilizing web from a roll having splices
DE10312601A1 (en) 2003-03-21 2004-09-30 Bhs Corrugated Maschinen- Und Anlagenbau Gmbh Material web and process for the production of corrugated cardboard
WO2004103705A1 (en) 2003-05-23 2004-12-02 Ebe Hesterman Method and device for the indirect digital printing of images on webs
DE102012002724A1 (en) 2012-02-10 2013-08-14 Robert Bosch Gmbh Method for regulating web tension in processing machine used for processing product web e.g. shaftless printing press, involves delaying effect of regulation output value on actuating command for second actuator by delay time
DE102013202871A1 (en) 2013-02-21 2014-09-04 Bhs Corrugated Maschinen- Und Anlagenbau Gmbh Material error detection device
DE102014013370A1 (en) 2014-09-09 2016-03-10 Heidelberger Druckmaschinen Ag Method for compensating local registration inaccuracies

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R163 Identified publications notified
R119 Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee