EP1981791B1 - Vorrichtung und verfahren zum messen und einstellen der bahnspannung zwischen farbwerken einer mehrfarbenmaschine - Google Patents

Vorrichtung und verfahren zum messen und einstellen der bahnspannung zwischen farbwerken einer mehrfarbenmaschine Download PDF

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Publication number
EP1981791B1
EP1981791B1 EP07801404A EP07801404A EP1981791B1 EP 1981791 B1 EP1981791 B1 EP 1981791B1 EP 07801404 A EP07801404 A EP 07801404A EP 07801404 A EP07801404 A EP 07801404A EP 1981791 B1 EP1981791 B1 EP 1981791B1
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EP
European Patent Office
Prior art keywords
web tension
setting
web
printing
sign
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.)
Active
Application number
EP07801404A
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German (de)
English (en)
French (fr)
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EP1981791A1 (de
Inventor
Manfred Loddenkötter
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.)
Windmoeller and Hoelscher KG
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Windmoeller and Hoelscher KG
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Publication of EP1981791A1 publication Critical patent/EP1981791A1/de
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/044—Sensing web tension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/02—Conveying or guiding webs through presses or machines

Definitions

  • the invention relates to a device and a method for measuring and adjusting the web tension between inking units of a multicolor rotary printing machine, as outlined in claims 1 and 2.
  • Multicolor rotary presses often change settings. After making such changes, the printing press often prints waste or at least printed images of limited quality. It has been found that those changes which have an influence on the web tension between inking units of the multicolor machine have an especially long influence on the print quality. Therefore, in the context of this publication, the term "settings" is understood to mean printing parameters which have an influence on the web tension between inking units of the multicolour machine. Such settings can be changed during a running print job. Such adjustments made during the printing process include the setting of the printing rollers or the change of the printing speed. Under attitudes in the sense mentioned above however also the possibly predominantly mechanical measures with the Understood printing. In this context again the hiring, the start of printing and the pre-registration play a particularly important role.
  • measuring machines are known on printing presses as devices for measuring the web tension, in which the force exerted by the web tension on the axis of the roller can be measured.
  • Possibilities to measure web tension are also measured by measuring the torque of rolls transporting the web.
  • it is known to influence the web tension, which prevails in a printing machine, when pressed by a control of the arrival and processing or the insertion and withdrawal.
  • it has also become known to measure the longitudinal register and to change the web tension when register errors occur.
  • the concerned in the WO 00/34042 A The presented printing machine also comprises devices for measuring the web tension.
  • the object of the present invention is to propose an apparatus and a method in which less waste or printed images of limited quality are printed.
  • Herein lies a constant line of printing press construction.
  • the substrate web is provided with a label that is transported on the substrate web through the various inking units of the machine.
  • the individual inking units here are assigned sensors of any kind that record the passage of the marker. From the evaluation of the measured values (in particular, when does the marking happen which inking unit) can the machine control derive information that is suitable for registering, preferably pre-registering.
  • the teaching of the aforementioned document with respect to all components of the outlined Register method procedure, types of marking, sensors or measuring methods, etc. - are considered part of this application. A recourse to these objects to supplement the present invention is reserved.
  • a control device in the sense of the present document may consist of any combination of software and / or hardware features that can generate said control commands.
  • the control module can also be guideline values known to take the web tension in the steady state. Against the background of these guideline values and current measured values recorded in the transient state, the machine controller, ie the control device, can determine which setting amounts it influences the web tension with the aid of the setting means. In this case, the control device can be based on the specification of the currently pending print job. These include material, material thickness, temperature of the material, modulus of elasticity of the material, etc. In view of this information, the control device can determine the adjustment amounts with the aid of a calculation module-which can likewise be any software or hardware-for example, based on physical relationships-such as Hooke's law.
  • the data in question may take the form of a calibration table and could also be in a memory module in direct access of the control device or at least accessed by a machine operator using the control device.
  • a further possibility to carry out the method according to the invention and in this way to obtain empirical values in the first place is that the at least one measuring device, before the first control process, notifies the control device which sign has the self-adjusting web tension change. Thereafter, the control device controls the at least one adjusting means so that there is a further controlled change in the web tension of this sign by a predetermined amount. This procedure is repeated until the sign of the self-adjusting web tension change changes, ie the value of the web tension prevailing in the stationary web tension state has passed. After this is done, either no further controlled web tension controls are made, or the sign of the controlled web tension change is changed.
  • the amount of the controlled web tension change is regulated in this way, then this amount should also be successively smaller, so that the amount by which the stationary web tension is crossed (overshoot amount) remains low: without Such a regulation of the amount of the respectively made between the measurements controlled change of the web tension amount, a successive reduction of the amount of the controlled web tension change can also be automatically provided.
  • the implementation of the control device with control programs that is capable of performing the mentioned advantageous adjustment methods is advantageous.
  • the web tension between two directly adjacent printing units will be set.
  • the printing web areas located between two adjacent printing units - also called web guide sections - are successively subjected to the method according to the invention.
  • the preferred order corresponds to the transport path of the printing material web.
  • Fig. 1 shows a constructed in a row construction gravure printing machine in side view.
  • the methods of the invention are particularly well suited for use in built in row construction machines, which are often referred to as a stand-up machines.
  • the printing substrate 3 is fed from the settlement 1 in the direction of arrow z of the printing press. First, it passes through the area of the pendulum roller system 2 and then runs to the feeder 4. It is particularly noteworthy in this context that the web tension can be set long-term between the feeder 4 and the drawer 5. However, this setting is not a setting in the sense of the invention, since it is not the setting that takes place on account of measurements and settings between the individual inking units D 1 to D 4 .
  • the printing substrate 3 After the printing substrate 3 has passed the feeder 4, it passes the first web tension measuring roll M 0.1 . Then it enters the area of the first printing unit D 1 , which is equipped with the impression roller P 1 and the forme cylinder F 1 . After passing through the associated pressure zone between the two aforementioned cylinders, the web 3 passes through an indicated drying unit TR 1 , to be again passed to a web tension measuring roll M 1.2 . Finally, the printing material reaches the second inking unit D 2 , which has a second printing zone. Between the nips of the first two printing units D 1 and D 2 , the first web guide section A is 1.2 .
  • the pendulum roller system 2 following the unwinding 1 and the pendulum roller system 7 connected upstream of the reel 6 have the function of web stores to allow the web tension and pull-out web tension control operations already mentioned above to be applied to the unwinding or unwinding.
  • Fig. 2 is the web tension curve f plotted against the time t. Shown is the web tension profile, as it sets, when a normal Andruckvorgang is performed on a stand machine, and the web tension independently, that approximates the stationary web tension S without additional control operations.
  • T 1 no pressure cylinder is employed in the relevant machine to the associated impression cylinder. Therefore, the web tension is determined solely by the feeder and the drawer. This level has the value A.
  • the parked printing units are in Fig. 2a shown.
  • Fig. 2b It is shown how the two forme cylinders are employed on the associated impression rollers P 1 and P 2 .
  • This measure is in Fig. 2 to see a sudden increase in web tension.
  • the web tension increases extremely fast from the initial value A to the maximum value M.
  • the transient compensation process during the period T 2 , it falls, similar to a decay function, on the value of the stationary web tension S.
  • waste paper is printed, since the web tension also has an effect on the web elongation and therefore leads to difficulties, in particular in the registration of the printing between the printing units D 1 and D 2 .
  • Fig. 2b It is shown how the two forme cylinders are employed on the associated impression rollers P 1 and P 2 .
  • FIG. 2c the two printing units D 1 and D 2 are shown, wherein the two form cylinder are employed on their impression rollers P 1 and P 2 .
  • This condition is present throughout the period T 2 .
  • Fig. 3 shows the course of the web tension against time, this time, after the adjustment of the pressure rollers, the web tension is adjusted in a controlled manner to the stationary web tension.
  • T 1 a time period with a web tension A. Again, in this period T 1, the web tension is determined only by insertion and removal. The hiring of the two pressure rollers F 1 and F 2 to their respective impression rollers P 1 and P 2 again leads to a sudden increase in the web tension.
  • the transient phase T 2 begins, first with a self-adjusting compensation process, as far as the web tension is concerned.
  • the web tension decreases by an amount M 1 , which is recorded by the web tension measuring roll M 1.2 .
  • the recorded measured values are fed to the control device, which can then determine the sign of the self-adjusting change.
  • the control device can also measure the voltage changes between two measuring points MP A and MP B and determine the speed of the web tension change via the change in voltage per unit of time. Based on the knowledge of the speed of the web tension change between the measuring points MP A and MP B , the control device determines the stroke or the amount of the controlled web tension change H 1 whose sign has already been determined.
  • the measuring device M 1,2 repeats the measurement between the measuring points MP C and MP D and in this case measures the self-adjusting web tension change M 2 .
  • the control device from the measuring points MP C and MP D determine the sign and the amount of self-adjusting web tension change M 2 . From these data, the speed of the web tension change between the two aforementioned measuring points can be determined again.
  • the controller advances a controlled web tension change by the amount H 2 , determining the sign and amount of web tension change based on the measurements.
  • the control device measures with the aid of the measuring device M 1,2, the change in the web tension between the measuring points MP E and MP F and hereby notes that the sign of the self-adjusting web tension change M 3 has changed and that the speed of the web tension change very is low. So there is no need for any further controlled web tension changes.
  • the amount by which the web tension at the measuring point MP E lies below the stationarily set web tension S is referred to below as overshoot.
  • the period T 2 in which the balancing process of the Web tension up to the stationary web tension, which prevails in the period T 3 , takes place, is much shorter than in Fig. 2 , in which this stationary web tension sets only by itself.
  • FIGS. 3a and 3b clarify once again the adjustment and compensation behavior of the printing units during the setting operations.
  • the adjustment operations by means of movements of the printing cylinder, in this case F 2 , made.
  • These adjustment processes are symbolized by the arrows pf. They lead to a change in the relative angular position of the two pressure cylinders F 1 and F 2 .
  • Fig. 4 shows again another controlled compensation process, which is carried out with the hub H 3 . Compared to Fig. 3 the speed of the unsteady compensation process is increased again here.
  • the stroke H 3 compensates almost the entire web tension difference between the measuring point M PH and the stationary web tension S.
  • Such compensation processes can occur, in particular, when the control device knows the stationary web tension S from the beginning. This may be the case when the control device is self-learning, that is to say that the control device is known in the form of a calibration table, the stationary web tension prevailing on a printing unit at a printing unit application, since such a web tension is already present during the processing of an old web Order.
  • the control device of the printing press here is usually the necessary stationary web tension S known. By measuring a web tension prevailing during the period T2, it is easy to determine the necessary web tension stroke H3. Even before this measurement takes place, the control device can be known by estimating or by empirical values (measured values with old possibly similar print jobs, the web tension after setting can always be similar) such a web tension stroke or the automatically adjusting web tension.
  • the method according to the invention thus also includes measuring operations, even if these have taken place in the case of already completed printing processes.
  • a printing machine suitable for carrying out these methods therefore also includes such measuring devices.
  • calculated and / or empirical values should form the background of the adjustment.
  • the angle ⁇ corresponding to the stroke H3 is either likewise known to the printing press or it is determined by known physical relationships such as Hooke's law.
  • material parameters such as the modulus of elasticity
  • the term “adjustment” or “adjustment” is used primarily for the adjustment of the web tension.
  • the rotation of the plate or cylinder in the register target position can be made before the pre-positioning.
  • This procedure considerably accelerates the (normally passive) "active" setting of the stationary web tension. Therefore, the isolated application of each of the above process steps already appears to be advantageous in itself.
  • control device In one application of the entire process, it even appears possible in this way to make this adjustment, while a single track section of the length of the web path in the machine between unwind and rewind the press passes through. This would be a very significant Einsfarung of waste paper.
  • control device In the aforementioned method steps can be performed by a control device, wherein the term "control device" is to be regarded as a functional expression.
  • a control device in the form of an industrial computer will be present as a central unit that combines much of the intelligence necessary to operate the printing press.
  • control unit may be provided with control means for automatically executing certain procedures.
  • Such control means may be program instructions - that is, software in particular.
  • control means may also include hardware components such as electronic devices such as AND or NAND devices.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
EP07801404A 2006-01-31 2007-01-25 Vorrichtung und verfahren zum messen und einstellen der bahnspannung zwischen farbwerken einer mehrfarbenmaschine Active EP1981791B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006004307A DE102006004307B4 (de) 2006-01-31 2006-01-31 Verfahren zum Messen und Einstellen der Bahnspannung zwischen Farbwerken einer Mehrfarbenmaschine
PCT/EP2007/000845 WO2007144031A1 (de) 2006-01-31 2007-01-25 Vorrichtung und verfahren zum messen und einstellen der bahnspannung zwischen farbwerken einer mehrfarbenmaschine

Publications (2)

Publication Number Publication Date
EP1981791A1 EP1981791A1 (de) 2008-10-22
EP1981791B1 true EP1981791B1 (de) 2011-01-05

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EP07801404A Active EP1981791B1 (de) 2006-01-31 2007-01-25 Vorrichtung und verfahren zum messen und einstellen der bahnspannung zwischen farbwerken einer mehrfarbenmaschine

Country Status (6)

Country Link
US (1) US8485095B2 (es)
EP (1) EP1981791B1 (es)
AT (1) ATE494249T1 (es)
DE (2) DE102006004307B4 (es)
ES (1) ES2357657T3 (es)
WO (1) WO2007144031A1 (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012013435A1 (de) 2012-04-04 2013-10-10 Robert Bosch Gmbh Verfahren zur Vorregistrierung einerBearbeitungsstation

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007053527A1 (de) 2007-11-09 2009-05-14 Robert Bosch Gmbh Verfahren zur Bahnspannungseinstellung bei einer Bearbeitungsmaschine
DE102008053406A1 (de) * 2008-10-27 2010-04-29 Robert Bosch Gmbh Verfahren zur automatischen Achskorrektur bei einer Bearbeitungsmaschine zur Bearbeitung einer Warenbahn
DE102009010023A1 (de) * 2009-02-21 2010-08-26 Robert Bosch Gmbh Verfahren zur Bahnspannungseinstellung bei einer Bearbeitungsmaschine
DE102011101842A1 (de) * 2011-05-17 2012-11-22 Robert Bosch Gmbh Verfahren zum Regeln der Bahnspannung in einer Bahnbearbeitungsmaschine
DE102011054693B4 (de) * 2011-10-21 2019-05-16 Océ Printing Systems GmbH & Co. KG Verfahren zur Ausführung einer Pausenfunktion während des Druckbetriebs bei einem Tintendruckgerät
DE102021120371A1 (de) * 2021-08-05 2023-02-09 Multivac Sepp Haggenmüller Se & Co. Kg Verpackungsmaschine mit folientransporteinrichtung sowie verfahren

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Publication number Priority date Publication date Assignee Title
DE102012013435A1 (de) 2012-04-04 2013-10-10 Robert Bosch Gmbh Verfahren zur Vorregistrierung einerBearbeitungsstation

Also Published As

Publication number Publication date
ATE494249T1 (de) 2011-01-15
US20090020641A1 (en) 2009-01-22
EP1981791A1 (de) 2008-10-22
US8485095B2 (en) 2013-07-16
WO2007144031A1 (de) 2007-12-21
DE102006004307A1 (de) 2007-08-09
DE102006004307B4 (de) 2013-08-14
ES2357657T3 (es) 2011-04-28
DE502007006180D1 (de) 2011-02-17

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