EP2392459A1 - Method and device for register control of a printing press - Google Patents

Method and device for register control of a printing press Download PDF

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Publication number
EP2392459A1
EP2392459A1 EP20110167679 EP11167679A EP2392459A1 EP 2392459 A1 EP2392459 A1 EP 2392459A1 EP 20110167679 EP20110167679 EP 20110167679 EP 11167679 A EP11167679 A EP 11167679A EP 2392459 A1 EP2392459 A1 EP 2392459A1
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EP
European Patent Office
Prior art keywords
printing
length
printing units
units
register
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Granted
Application number
EP20110167679
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German (de)
French (fr)
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EP2392459B1 (en
Inventor
Josef Zeinhofer
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Mueller Martini Holding AG
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Mueller Martini Holding AG
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Publication of EP2392459A1 publication Critical patent/EP2392459A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0081—Devices for scanning register marks
    • 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
    • B41F13/025—Registering devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2213/00—Arrangements for actuating or driving printing presses; Auxiliary devices or processes
    • B41P2213/70—Driving devices associated with particular installations or situations
    • B41P2213/73—Driving devices for multicolour presses
    • B41P2213/734—Driving devices for multicolour presses each printing unit being driven by its own electric motor, i.e. electric shaft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2213/00—Arrangements for actuating or driving printing presses; Auxiliary devices or processes
    • B41P2213/90—Register control

Definitions

  • the invention relates to a method for register control of a printing machine according to the features of claim 1, a device therefor according to claim 12 and a device having the printing machine according to claim 18.
  • multicolor printing at least two partial colors are printed on top of each other in a printing press with several imaging cylinders. If a press is in the register, or in other words, in the register, print images of the different printing units, which are each responsible for printing with a partial color, meet each other exactly.
  • Web presses often have long paths of a printing material, in particular paper and film, between two printing units.
  • devices are integrated in these web presses with the help of which the register can be set exactly and readjusted again and again in the course of the printing process. Also in sheetfed presses such register regulations are established.
  • Auxiliaries of known register controls are, for example, markings which are printed in each printing unit outside the image area, so-called registration marks or registration marks. With the help of image processing systems, the positions of the relevant registration marks are recorded and evaluated to each other and the printing press is readjusted accordingly.
  • compensation can take place, for example, by moving individual guide rollers, the register rollers, which shorten or lengthen the path between two printing units.
  • the longitudinal register can also be adjusted to one another by rotating the imaging cylinders.
  • the cause of a deviation in the register is usually another printing material, which has a different elongation behavior compared to the previously used printing material.
  • the speed of the printing press may also require register control because the web of the substrate behaves differently depending on the speed of the printing press.
  • Corresponding register rules are for example in the DE 102006060212 A1 or the DE 10254836 A1 disclosed.
  • a shortening of the length of the printed image by about 1 mm, based on the original format of the printed image, is achieved by an acceleration of the drive of the imaging cylinder.
  • the printed image is shortened accordingly.
  • the printed image lengthens by about 3 mm, based on the original format of the printed image, when the respective drive of the imaging cylinder is slowed down with respect to the web of the printing material.
  • the print image can be drawn over a longer portion of the web than provided by a corresponding negative on the imaging cylinder.
  • Register deviations caused by printed image length changes are usually not in the capture range of the initially mentioned register controls. If, for example, there are five printed images or formats between two adjacent printing units, which are each lengthened, a change in the length of the printed image results in a register deviation in the downstream printing unit in the production direction of five times the change in the length of the printed image.
  • the length of the printing material between two adjacent printing units often varies considerably as a result of changes in production, so that it is not automatically clear how many printed images lie between two adjacent printing units.
  • the invention has for its object to provide a method and apparatus which eliminate lying outside the usual capture range of known register controls register deviations by a controller. For this purpose, significant influencing factors have to be determined and fed to the press as control variables.
  • the method for register control is used in a printing press, which comprises a first printing unit and at least one further printing unit.
  • the printing units each have at least one imaging cylinder at a rotational speed.
  • register settings of the at least one imaging cylinder of the other printing units are changed according to a predetermined change in length of a printed image.
  • the object is achieved according to claim 1, characterized in that the change of the register settings is carried out as a function of at least one length of a printing material between the printing units.
  • the process saves waste and makeready time because the register control automatically performs a correction. The machine operator does not have to make any intervention, which is why the process is safer.
  • a predetermined change in length of a printed image is realized by a change in the ratio of the rotational speed of the at least one imaging cylinder of the further printing units with respect to a speed of the printing material.
  • the theoretically correct rotational speed of the at least one imaging cylinder is related to the rotational speed associated with the changed print image length. As a rule, this relationship exists between the rotational speeds of a blanket cylinder and a counter-pressure cylinder.
  • the change in the register settings of the at least one imaging cylinder of the further printing units is corrected in a next advantageous embodiment by a correction of the length of the printing material between the printing units with respect to a reference position in the printing machine.
  • This reference position is defined particularly advantageously by the first printing unit involved in the printing process in one direction of travel of the printing material.
  • the correction is formed according to a further advantageous embodiment of a multiplication of the change in length of the print image with a number of print images between the respective adjacent printing units.
  • the number of print images is determined by dividing the length of the printing material between the respective adjacent printing units by a length of a printed image in a running direction of the printing substrate.
  • the length of the printing material between the respective adjacent printing units is determined particularly advantageously by evaluating at least one signal from at least two sensors.
  • the sensors of advantageous embodiments emit the signal when they recognize a marking of the printing material.
  • the marking is applied particularly advantageously with a marking device before or in the first printing unit on or in the printing material, in particular by stamping, punching, paint application or gluing.
  • the length of the printing material between the adjacent printing units is determined by means of advantageous methods with an accuracy of less than 0.2 mm.
  • pulse generators are used, for example, which are provided in drive systems of the printing units, in particular in servo drive systems. From the determined angular position of the printing units, a signal is generated, which is evaluated together with the length of the printing material between the respective adjacent printing units signals, the register settings of the at least one imaging cylinder of the other printing units are changed according to the evaluation.
  • a device for register control of a printing machine is inventively intended for use in a printing press.
  • the printing press has a first printing unit and at least one further printing unit.
  • Each printing unit has at least one imaging cylinder at a rotational speed.
  • Register settings of the further printing units following the first printing unit are changeable to avoid a divergence of printed images of several printing units to be printed one above the other.
  • the device for register control has a control device and in each case at least one drive system and in each case at least one sensor for the printing units.
  • the drive system is in particular a servo drive system.
  • a marking of the printing material can be detected, a corresponding signal can be generated and forwarded to the control device.
  • the length of a printing material between the printing units can be determined by means of the control device.
  • the register settings of the further printing units with the drive systems can be changed.
  • the at least one sensor is arranged in each case at the printing units or in a running direction of the printing material behind the printing units.
  • a further advantageous embodiment of the device has a marking device which is arranged in the running direction of the printing material before or in a first printing unit.
  • a marking can be applied to or into the printing material, in particular an impression of a stamp, a perforation, a paint application or a pasting.
  • the device has at least one pulse generator, in particular arranged on the drive system, with which the angular position of at least one of the printing units can be detected and forwarded to the control device and to the drive system.
  • Particularly advantageous is a printing machine equipped with one of the devices.
  • FIG. 2 is schematically a printing press 6 with five printing units 1, 2, 3, 4, 5, namely a first printing unit 1 and four other printing units 2, 3, 4, 5 shown.
  • a printing substrate 9 is passed through the printing machine 6 and passes a printing unit 1, 2, 3, 4, 5 after the other.
  • Two webs 13, 13 'of the printing material 9 are in FIG. 1 in a view from above, to illustrate their division into sections by printed images 11, 11 '.
  • each printing unit 1, 2, 3, 4, 5 is also called form cylinder with imaging cylinders 26, 27, a partial color of the printed image 11, 11 'printed on the substrate 9.
  • the multi-color print image 11, 11 ' is produced by printing the different partial colors of the printing units 1, 2, 3, 4, 5 over one another.
  • the printing units 1, 2, 3, 4, 5 according to FIG. 2 have vertically each other two imaging cylinders 26, 27, namely a plate cylinder arranged above 26a and a rubber blanket cylinder arranged below 27a, below which in turn an impression cylinder 28 is positioned.
  • the printing material 9 is between the blanket cylinder 27a and the impression cylinder 28a in the direction of the twelfth transported.
  • the print image 11, 11 ' is initially formed above the printing material 9 by the successive unrolling of the plate cylinder 26a on the blanket cylinder 27a.
  • These imaging cylinders 26, 27 rotate at the same speed and are operated jointly depending on the desired length of the print image 11, 11 'at the speed of the printing material 9 or faster or slower than this speed.
  • This speed variation applies to all printing units 1, 2, 3, 4, 5 to the same extent or the same speed difference.
  • Each printing unit 1, 2, 3, 4, 5 can be driven with an individual rotational speed ⁇ directly with its own drive system 31, 32, 33, 34, 35 or indirectly via drive rollers, not shown.
  • a marking device 10 is provided in front of a first printing unit 1.
  • the marking device 10 can also be arranged in the first printing unit 1.
  • the marking device 10 applies a mark 8 on the substrate 9. Accordingly, a determination of the length of between the printing units 1, 2, 3, 4, 5 existing substrate 9 only once made and only be repeated when the actual length of the printing material 9 between the printing units 1, 2, 3, 4, 5 is changed.
  • the sensors 21, 22, 23, 24, 25 generate a signal as soon as the marking 8 reaches its position and forward this signal to a control device 29 connected to the drive systems 31, 32, 33, 34, 35 of the printing units 1, 2, 3, 4, 5.
  • a control device 29 connected to the drive systems 31, 32, 33, 34, 35 of the printing units 1, 2, 3, 4, 5.
  • a printing unit 1, 2, 3, 4, 5 and the respectively subsequently arranged sensor 21, 22, 23, 24, 25 there is a known distance s. Within this distance s is a section of defined length of the printing material 9.
  • the sensors 21, 22, 23, 24, 25 in the respective printing unit 1, 2, 3, 4, 5 are arranged and also used to detect web breaks of the printing material 9.
  • the control device 29 can also be formed by the printing press control.
  • the web 13, 13 'of the printing material 9 has a first length I 12 between the first printing unit 1 and the second printing unit 2. Accordingly, the following in the direction 12 interspaces between the printing units 2, 3, 4, 5, a second length I 23 , a third length I 34 and a fourth length I 45 of the web 13, 13 'of the printing material 9 assign. In particular, during production changes, these lengths I 12 , I 23 , I 34 , I 45 of the web 13, 13 'of the printing substrate 9 vary.
  • Such a printing press 6 is capable of the respective length I 12 , I 23 , I 34 , I 45 of the web 13, 13 'of the printing substrate 9 between the printing units 1, 2, 3, 4, 5 by means of the sensors 21, 22nd , 23, 24, 25 and the controller 29 to determine, especially during changes during the machine run.
  • the printing machine 6 After the printing machine 6 has been switched on or after its configuration has been changed by changing the length of the web 13, 13 'of the printing substrate 9 between two printing units 1, 2, 3, 4, 5, first a release for measuring, ie for determining the new length of the web 13, 13 'of the printing material 9 between the printing units 1, 2, 3, 4, 5.
  • the sequence according to FIG. 3 following the mark 8 is then applied to the substrate 9.
  • the mark 8 can also be applied in the substrate 9.
  • the due to the respective sensor 21, 22, 23, 24, 25 passing mark 8 detected signals of the sensors 21, 22, 23, 24, 25 evaluated in the control device 29. This knows the distance s of the printing unit 1, 2, 3, 4, 5 to the respective subsequently arranged sensor 21, 22, 23, 24, 25, but not necessarily the distance of the first printing unit 1 to the marking device 10.
  • the control device 29 From the signals of Sensors 21, 22, 23, 24, 25 and the known distances s in the control device 29, the current lengths I 12 , I 23 , I 34 , I 45 of the printing material 9 between the printing units 1, 2, 3, 4, 5 determined and saved, ie stored.
  • the control device 29 generates a signal for changing the register settings of the further printing units 2, 3, 4, 5 and outputs this to the respective drive systems 32, 33, 34, 35 on.
  • a measurement carried out with the first and the second sensor 21, 22 leads, after evaluation of the signals based on the measurement results and transmitted to the control device 29, at least to a corresponding influence on the register settings of the second printing unit 2.
  • a release for printing takes place. Subsequently, the control device 29 and the drive systems 31, 32, 33, 34, 35 wait for the next start-up or the next configuration change of the printing machine 6.
  • FIG. 1 For comparison, two webs 13, 13 'of the printing material 9 are shown configured parallel to each other.
  • the first track 13 has a total length L.
  • On this track 13 find five identical printed images 11 with a length I space.
  • the second web 13 'of the printing substrate 9 differs from the first web 13 of the printing substrate 9 by a change in the length of the printed images 11, 11'.
  • the resulting total length L 'of the five printed images 11' of the second web 13 ', each having a length I' is overall significantly shorter than that of the first web 13.
  • FIG. 1 is thus a specified by the machine operator change in length ⁇ I 1 of the printed images 11, 11 'as the difference of the length I of the printed images 11 to the length I' of the printed images 11 'readable. It is clear that by such a change in length in each of the five located in the space between each two printing units 1, 2, 3, 4, 5 printed images 11, 11 'after the fifth printed image 11, 11' a total four times the change in length ⁇ I 4 of the web 13 'with respect to the web 13 or vice versa is achieved.
  • FIG. 4 illustrates the process when performing a correction of the register as a function of the print image length.
  • the length I 12 , I 23 , I 34 , I 45 between the printing units 1, 2, 3, 4, 5 determined and the length of the printed images 11, 11 'known stands for the controller 29 as many printed images 11, 11 'are located between two printing units 1, 2, 3, 4, 5.
  • a correction for the register settings is calculated by the control device 29 with a change in length ⁇ I 1 of the printed image 11, 11' specified by the machine operator to be corrected, further printing units 2, 3, 4, 5 and their drive systems 32, 33, 34, 35 output. In this way, the printing machine 6 located in the register before the printing image length change remains in the register.
  • the printing units 1, 2, 3, 4, 5 each have a pulse generator 30 arranged on the drive system 31, 32, 33, 34, 35.
  • the pulse generators 30 With the pulse generators 30, the angular position of at least one of the printing units 1, 2, 3, 4, 5 can be detected and forwarded to the drive system 31, 32, 33, 34, 35 and to the control device 29. From the determined angular position, a signal is generated, which is evaluated in the control device 29 together with the length I 12 , I 23 , I 34 , I 45 of the printing material 9 between the respective adjacent printing units 1, 2, 3, 4, 5 relevant signals is, wherein the register settings of the at least one imaging cylinder 26, 27 of the other printing units 2, 3, 4, 5 are changed according to the evaluation.

Abstract

The method involves altering register adjustments of an imaging cylinder (26,27) of a printing unit (1,2,3,4,5) corresponding to a predetermined length change of a print image to avoid a divergence of print images of multiple printing units. The alteration of the register adjustments is carried out depending on a length (I-12,I-23,I-34,I-45) of a printing substrate (9) between the printing units. An independent claim is also included for a device for controlling register of a printing machine.

Description

Die Erfindung betrifft ein Verfahren zur Registersteuerung einer Druckmaschine gemäß den Merkmalen des Anspruchs 1, eine Vorrichtung hierfür gemäß Anspruch 12 sowie eine die Vorrichtung aufweisende Druckmaschine gemäß Anspruch 18.The invention relates to a method for register control of a printing machine according to the features of claim 1, a device therefor according to claim 12 and a device having the printing machine according to claim 18.

Im Mehrfarbendruck werden in einer Druckmaschine mit mehreren bildgebenden Zylindern mindestens zwei Teilfarben übereinander gedruckt. Steht eine Druckmaschine im Register, oder anders ausgedrückt, im Passer, treffen Druckbilder der verschiedenen Druckwerke, die jeweils für das Bedrucken mit einer Teilfarbe zuständig sind, exakt aufeinander.In multicolor printing, at least two partial colors are printed on top of each other in a printing press with several imaging cylinders. If a press is in the register, or in other words, in the register, print images of the different printing units, which are each responsible for printing with a partial color, meet each other exactly.

Rollendruckmaschinen weisen oftmals lange Wege eines Bedruckstoffs, insbesondere Papier und Folie, zwischen zwei Druckwerken auf. Bekanntermaßen sind in diesen Rollendruckmaschinen Vorrichtungen integriert, mit deren Hilfe das Register exakt eingestellt und im Verlauf des Druckvorgangs immer wieder nachgestellt werden kann. Auch in Bogendruckmaschinen sind solche Registerregelungen etabliert.Web presses often have long paths of a printing material, in particular paper and film, between two printing units. As is known, devices are integrated in these web presses with the help of which the register can be set exactly and readjusted again and again in the course of the printing process. Also in sheetfed presses such register regulations are established.

Hilfsmittel bekannter Registerregelungen sind beispielsweise Markierungen, die in jedem Druckwerk außerhalb der Bildfläche mitgedruckt werden, sogenannte Passermarken oder Passkreuze. Mit Hilfe von Bildverarbeitungssystemen werden die Stellungen der jeweils relevanten Passermarken zueinander aufgenommen sowie ausgewertet und die Druckmaschine wird entsprechend nachgeregelt.Auxiliaries of known register controls are, for example, markings which are printed in each printing unit outside the image area, so-called registration marks or registration marks. With the help of image processing systems, the positions of the relevant registration marks are recorded and evaluated to each other and the printing press is readjusted accordingly.

Bei der Beurteilung des Registers oder der Registergenauigkeit wird zwischen dem Längsregister (in Laufrichtung der Bahn des Bedruckstoffs), dem Seitenregister (quer zur Laufrichtung) und dem Diagonalregister unterschieden. Die Problematik der Erfindung betrifft im Wesentlichen das Längsregister.In the evaluation of the register or register accuracy, a distinction is made between the longitudinal register (in the direction of travel of the web of the printing substrate), the page register (transverse to the direction of travel) and the diagonal register. The problem of the invention relates essentially to the longitudinal register.

Sind Längsregisterabweichungen festzustellen, kann ein Ausgleich beispielsweise durch Verschieben von einzelnen Leitwalzen, den Registerwalzen, die den Weg zwischen zwei Druckwerken verkürzen oder verlängern, stattfinden. Alternativ kann das Längsregister auch durch ein Verdrehen der bildgebenden Zylinder zueinander verstellt werden.If longitudinal register deviations are observed, compensation can take place, for example, by moving individual guide rollers, the register rollers, which shorten or lengthen the path between two printing units. Alternatively, the longitudinal register can also be adjusted to one another by rotating the imaging cylinders.

Ursache für eine Abweichung im Register ist üblicherweise ein anderer Bedruckstoff, der gegenüber dem zuvor verwendeten Bedruckstoff ein anderes Dehnungsverhalten aufweist. Auch die Geschwindigkeit der Druckmaschine kann eine Registerregelung erforderlich machen, weil sich die Bahn des Bedruckstoffs je nach Geschwindigkeit der Druckmaschine anders verhält.The cause of a deviation in the register is usually another printing material, which has a different elongation behavior compared to the previously used printing material. The speed of the printing press may also require register control because the web of the substrate behaves differently depending on the speed of the printing press.

Entsprechende Registerregelungen sind beispielsweise in der DE 102006060212 A1 oder der DE 10254836 A1 offenbart.Corresponding register rules are for example in the DE 102006060212 A1 or the DE 10254836 A1 disclosed.

Bekannte Registerregelungen berücksichtigen unzureichend oder nicht, dass die Länge der Bahn des Bedruckstoffs zwischen den am Druck beteiligten Druckwerken durch Umstellungen der Druckmaschinenkonfiguration deutlich variieren kann. Dies kann dazu führen, dass die Registerabweichungen größer als der Fangbereich üblicher Registerregelungen sind, wodurch das Register nicht mehr automatisch angepasst werden kann. Auch eine Beeinflussung des Registers durch eine vom Maschinenführer vorgegebene Änderung der Länge des vorgesehenen Druckbildes ist nicht thematisiert. Bekannten Druckmaschinen setzen diese Vorgabe durch eine Überlagerungsgeschwindigkeit der individuellen Antriebe von bildgebenden Zylindern benachbarter, am Druckprozess des Druckbildes beteiligter Druckwerke um.Known registration rules consider inadequately or not that the length of the web of the printing material between the printing units involved in the printing can vary significantly by changing the printing press configuration. This can cause the register deviations to be larger than the catch range of conventional register controls, which means that the register can no longer be adjusted automatically. An influence of the register by a predetermined by the machine operator change the length of the intended printed image is not discussed. Known printing machines implement this requirement by a superimposition speed of the individual drives of imaging cylinders of adjacent printing units involved in the printing process of the printed image.

Eine Verkürzung der Länge des Druckbildes um etwa bis 1 mm, bezogen auf das ursprüngliche Format des Druckbildes, wird durch eine Beschleunigung des Antriebes der bildgebenden Zylinder erreicht. Durch die gegenüber der theoretisch richtigen Geschwindigkeit des Bedruckstoffs höhere aber konstante Drehzahl verkürzt sich das Druckbild entsprechend.A shortening of the length of the printed image by about 1 mm, based on the original format of the printed image, is achieved by an acceleration of the drive of the imaging cylinder. By compared to the theoretically correct speed of the printing material higher but constant speed, the printed image is shortened accordingly.

Demgegenüber verlängert sich das Druckbild um etwa bis 3 mm, bezogen auf das ursprüngliche Format des Druckbildes, wenn der jeweilige Antrieb des bildgebenden Zylinders gegenüber der Bahn des Bedruckstoffs verlangsamt wird. So lässt sich das Druckbild über einen längeren Abschnitt der Bahn, als durch ein entsprechendes Negativ auf dem bildgebenden Zylinder vorgesehen, ziehen.In contrast, the printed image lengthens by about 3 mm, based on the original format of the printed image, when the respective drive of the imaging cylinder is slowed down with respect to the web of the printing material. Thus, the print image can be drawn over a longer portion of the web than provided by a corresponding negative on the imaging cylinder.

Registerabweichungen verursacht durch Druckbildlängenänderungen liegen in der Regel nicht im Fangbereich der eingangs angesprochen Registerregelungen. Liegen beispielsweise zwischen zwei benachbarten Druckwerken fünf Druckbilder bzw. Formate, die jeweils verlängert werden, resultiert aus der Veränderung der Länge des Druckbildes insgesamt eine Registerabweichung in dem in Produktionsrichtung nachgeordneten Druckwerk in einer Größenordnung des Fünffachen der Veränderung der Länge des Druckbildes.Register deviations caused by printed image length changes are usually not in the capture range of the initially mentioned register controls. If, for example, there are five printed images or formats between two adjacent printing units, which are each lengthened, a change in the length of the printed image results in a register deviation in the downstream printing unit in the production direction of five times the change in the length of the printed image.

In besonders flexibel einsetzbaren Druckmaschinen variiert die Länge des Bedruckstoffs zwischen zwei benachbarten Druckwerken durch Umstellungen in der Produktion oftmals beträchtlich, sodass nicht automatisch feststeht, wie viele Druckbilder zwischen zwei benachbarten Druckwerken liegen.In particularly flexible printing presses, the length of the printing material between two adjacent printing units often varies considerably as a result of changes in production, so that it is not automatically clear how many printed images lie between two adjacent printing units.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung zu schaffen, welche außerhalb des üblichen Fangbereichs bekannter Registerregelungen liegende Registerabweichungen durch eine Steuerung beseitigen. Dazu sind wesentliche Einflussfaktoren zu ermitteln und der Druckmaschine als Steuergrößen zuzuführen.The invention has for its object to provide a method and apparatus which eliminate lying outside the usual capture range of known register controls register deviations by a controller. For this purpose, significant influencing factors have to be determined and fed to the press as control variables.

Das Verfahren zur Registersteuerung findet in einer Druckmaschine Anwendung, die ein erstes Druckwerk und zumindest ein weiteres Druckwerk umfasst. Die Druckwerke weisen jeweils zumindest einen bildgebenden Zylinder mit einer Rotationsgeschwindigkeit auf. Zum Vermeiden eines Auseinanderlaufens von Druckbildern mehrerer Druckwerke werden Registereinstellungen des zumindest einen bildgebenden Zylinders der weiteren Druckwerke entsprechend einer vorgegebenen Längenänderung eines Druckbildes verändert.The method for register control is used in a printing press, which comprises a first printing unit and at least one further printing unit. The printing units each have at least one imaging cylinder at a rotational speed. To avoid a divergence of print images of multiple printing units register settings of the at least one imaging cylinder of the other printing units are changed according to a predetermined change in length of a printed image.

Die Aufgabe ist gemäss Anspruch 1 dadurch gelöst, dass die Veränderung der Registereinstellungen in Abhängigkeit von zumindest einer Länge eines Bedruckstoffs zwischen den Druckwerken durchgeführt wird.The object is achieved according to claim 1, characterized in that the change of the register settings is carried out as a function of at least one length of a printing material between the printing units.

Durch das Verfahren lassen sich Makulatur und Rüstzeit einsparen, weil die Registersteuerung automatisch eine Korrektur ausführt. Der Maschinenführer muss dabei keinen Eingriff vornehmen, weshalb der Prozess sicherer abläuft.The process saves waste and makeready time because the register control automatically performs a correction. The machine operator does not have to make any intervention, which is why the process is safer.

Die Veränderung der Registereinstellungen erfolgt in einer vorteilhaften Ausführungsform des Verfahrens während des laufenden Betriebs der Druckmaschine. Eine vorgegebene Längenänderung eines Druckbildes wird durch eine Änderung des Verhältnisses der Rotationsgeschwindigkeit des zumindest einen bildgebenden Zylinders der weiteren Druckwerke gegenüber einer Geschwindigkeit des Bedruckstoffs realisiert. Die theoretisch richtige Rotationsgeschwindigkeit des zumindest einen bildgebenden Zylinders wird dabei auf die der geänderten Druckbildlänge zugeordneten Rotationsgeschwindigkeit bezogen. In der Regel besteht dieses Verhältnis zwischen den Rotationsgeschwindigkeiten eines Gummituchzylinders und eines Gegendruckzylinders.The change of the register settings takes place in an advantageous embodiment of the method during the ongoing operation of the printing press. A predetermined change in length of a printed image is realized by a change in the ratio of the rotational speed of the at least one imaging cylinder of the further printing units with respect to a speed of the printing material. The theoretically correct rotational speed of the at least one imaging cylinder is related to the rotational speed associated with the changed print image length. As a rule, this relationship exists between the rotational speeds of a blanket cylinder and a counter-pressure cylinder.

Die Veränderung der Registereinstellungen des zumindest einen bildgebenden Zylinders der weiteren Druckwerke wird bei einer nächsten vorteilhaften Ausführungsform korrigiert, indem eine Korrektur der Länge des Bedruckstoffs zwischen den Druckwerken in Bezug zu einer Referenzposition in der Druckmaschine erfolgt. Diese Referenzposition ist besonders vorteilhaft durch das erste in einer Laufrichtung des Bedruckstoffs am Druckprozess beteiligte Druckwerk definiert.The change in the register settings of the at least one imaging cylinder of the further printing units is corrected in a next advantageous embodiment by a correction of the length of the printing material between the printing units with respect to a reference position in the printing machine. This reference position is defined particularly advantageously by the first printing unit involved in the printing process in one direction of travel of the printing material.

Die Korrektur wird gemäß einer weiteren vorteilhaften Ausführungsform aus einer Multiplikation der Längenänderung des Druckbildes mit einer Anzahl der Druckbilder zwischen den jeweils benachbarten Druckwerken gebildet. Die Anzahl der Druckbilder wird durch Dividieren der Länge des Bedruckstoffs zwischen den jeweils benachbarten Druckwerken durch eine Länge eines Druckbildes in einer Laufrichtung des Bedruckstoffs ermittelt.The correction is formed according to a further advantageous embodiment of a multiplication of the change in length of the print image with a number of print images between the respective adjacent printing units. The number of print images is determined by dividing the length of the printing material between the respective adjacent printing units by a length of a printed image in a running direction of the printing substrate.

Die Länge des Bedruckstoffs zwischen den jeweils benachbarten Druckwerken wird besonders vorteilhaft durch eine Auswertung mindestens eines Signals von zumindest zwei Sensoren ermittelt. Die Sensoren vorteilhafter Ausführungsformen geben das Signal aus, wenn sie eine Markierung des Bedruckstoffs erkennen.The length of the printing material between the respective adjacent printing units is determined particularly advantageously by evaluating at least one signal from at least two sensors. The sensors of advantageous embodiments emit the signal when they recognize a marking of the printing material.

Die Markierung wird besonders vorteilhaft mit einer Markierungseinrichtung vor oder in dem ersten Druckwerk auf oder in den Bedruckstoff appliziert, insbesondere durch Stempeln, Lochen, Farbauftragen oder Bekleben.The marking is applied particularly advantageously with a marking device before or in the first printing unit on or in the printing material, in particular by stamping, punching, paint application or gluing.

Als Sensoren werden vorteilhaft Lichtschranken verwendet.As sensors, photocells are advantageously used.

Die Länge des Bedruckstoffs zwischen den jeweils benachbarten Druckwerken wird mittels vorteilhafter Verfahren mit einer Genauigkeit kleiner 0,2 mm ermittelt.The length of the printing material between the adjacent printing units is determined by means of advantageous methods with an accuracy of less than 0.2 mm.

Zur zusätzlichen Auswertung der Winkellage der Druckwerke werden beispielsweise Impulsgeber verwendet, die in Antriebssystemen der Druckwerke, insbesondere in Servontriebssystemen vorgesehen sind. Aus der ermittelten Winkellage der Druckwerke wird ein Signal erzeugt, welches gemeinsam mit den die Länge des Bedruckstoffs zwischen den jeweils benachbarten Druckwerken betreffenden Signalen ausgewertet wird, wobei die Registereinstellungen des zumindest einen bildgebenden Zylinders der weiteren Druckwerke entsprechend der erfolgten Auswertung verändert werden.For additional evaluation of the angular position of the printing units, pulse generators are used, for example, which are provided in drive systems of the printing units, in particular in servo drive systems. From the determined angular position of the printing units, a signal is generated, which is evaluated together with the length of the printing material between the respective adjacent printing units signals, the register settings of the at least one imaging cylinder of the other printing units are changed according to the evaluation.

Eine Vorrichtung zur Registersteuerung einer Druckmaschine ist erfindungsgemäß für den Einsatz in einer Druckmaschine bestimmt. Die Druckmaschine besitzt ein erstes Druckwerk und zumindest ein weiteres Druckwerk. Jedes Druckwerk weist zumindest einen bildgebenden Zylinder mit einer Rotationsgeschwindigkeit auf. Registereinstellungen der auf das erste Druckwerk folgenden, weiteren Druckwerke sind zum Vermeiden eines Auseinanderlaufens von übereinander zu druckenden Druckbildern mehrerer Druckwerke veränderbar.A device for register control of a printing machine is inventively intended for use in a printing press. The printing press has a first printing unit and at least one further printing unit. Each printing unit has at least one imaging cylinder at a rotational speed. Register settings of the further printing units following the first printing unit are changeable to avoid a divergence of printed images of several printing units to be printed one above the other.

Die Vorrichtung zur Registersteuerung weist eine Steuereinrichtung und jeweils zumindest ein Antriebssystem sowie jeweils zumindest einen Sensor für die Druckwerke auf. Das Antriebssystem ist insbesondere ein Servoantriebssystem. Mit dem zumindest einen Sensor ist eine Markierung des Bedruckstoffs erfassbar, ein entsprechendes Signal generierbar und an die Steuereinrichtung weiterleitbar. Aus den empfangenen Signalen des zumindest einen Sensors ist mittels der Steuereinrichtung die Länge eines Bedruckstoffs zwischen den Druckwerken ermittelbar. In Abhängigkeit der ermittelten Länge sind die Registereinstellungen der weiteren Druckwerke mit den Antriebssystemen veränderbar.The device for register control has a control device and in each case at least one drive system and in each case at least one sensor for the printing units. The drive system is in particular a servo drive system. With the at least one sensor, a marking of the printing material can be detected, a corresponding signal can be generated and forwarded to the control device. From the received signals of the at least one sensor, the length of a printing material between the printing units can be determined by means of the control device. Depending on the determined length, the register settings of the further printing units with the drive systems can be changed.

In einer vorteilhaften Ausführungsform der Vorrichtung ist der zumindest eine Sensor jeweils an den Druckwerken oder in einer Laufrichtung des Bedruckstoffs jeweils hinter den Druckwerken angeordnet.In an advantageous embodiment of the device, the at least one sensor is arranged in each case at the printing units or in a running direction of the printing material behind the printing units.

Eine weitere vorteilhafte Ausführungsform der Vorrichtung weist eine Markierungseinrichtung auf, die in Laufrichtung des Bedruckstoffs vor oder in einem ersten Druckwerk angeordnet ist. Besonders vorteilhaft ist mittels der Markierungseinrichtung vor oder in dem ersten Druckwerk eine Markierung auf oder in den Bedruckstoff applizierbar, insbesondere ein Abdruck eines Stempels, eine Lochung, ein Farbauftrag oder eine Beklebung.A further advantageous embodiment of the device has a marking device which is arranged in the running direction of the printing material before or in a first printing unit. Particularly advantageously, by means of the marking device before or in the first printing unit, a marking can be applied to or into the printing material, in particular an impression of a stamp, a perforation, a paint application or a pasting.

Gemäß einer weiteren Ausführungsform weist die Vorrichtung zumindest einen insbesondere am Antriebssystem angeordneten Impulsgeber auf, mit dem die Winkellage zumindest eines der Druckwerke erfassbar und an die Steuereinrichtung sowie das Antriebssystem weiterleitbar ist.According to a further embodiment, the device has at least one pulse generator, in particular arranged on the drive system, with which the angular position of at least one of the printing units can be detected and forwarded to the control device and to the drive system.

Besonders vorteilhaft ist eine Druckmaschine mit einer der Vorrichtungen ausgerüstet.Particularly advantageous is a printing machine equipped with one of the devices.

Nachstehend wird die Erfindung anhand von Figuren näher erläutert. Es zeigen

  • Figur 1 eine Draufsicht auf zwei parallel zueinander ausgelegt dargestellten Bahnen des Bedruckstoffs mit ihrer jeweiligen Aufteilung in Druckbilder,
  • Figur 2 eine schematische Darstellung eines Radialschnitts durch eine Druckmaschine mit fünf Druckwerken und jeweils individuell angetriebenen, bildgebenden Zylindern, wobei eine Bahn des Bedruckstoffs durch die Druckmaschine geleitet wird,
  • Figur 3 ein erstes Blockschaltbild zur Verdeutlichung des Verfahrensablaufs bei der Ermittlung der geometrischen Längen zwischen den Druckwerken, und
  • Figur 4 ein zweites Blockschaltbild zur Verdeutlichung des Verfahrensablaufs beim Ausführen der Korrektur des Registers.
The invention will be explained in more detail with reference to figures. Show it
  • FIG. 1 a plan view of two parallel to each other designed tracks of the substrate with their respective division into printed images,
  • FIG. 2 a schematic representation of a radial section through a printing machine with five printing units and individually driven, imaging cylinders, wherein a web of the printing material is passed through the printing press,
  • FIG. 3 a first block diagram to illustrate the process flow in the determination of the geometric lengths between the printing units, and
  • FIG. 4 a second block diagram illustrating the process flow when performing the correction of the register.

In Figur 2 ist schematisch eine Druckmaschine 6 mit fünf Druckwerken 1, 2, 3, 4, 5, nämlich einem ersten Druckwerk 1 und vier weiteren Druckwerken 2, 3, 4, 5 dargestellt. In einer Laufrichtung 12 wird ein Bedruckstoff 9 durch die Druckmaschine 6 hindurchgeführt und passiert dabei ein Druckwerk 1, 2, 3, 4, 5 nach dem anderen. Zwei Bahnen 13, 13' des Bedruckstoffs 9 sind in Figur 1 in einer Ansicht von oben dargestellt, um deren Aufteilung in Abschnitte durch Druckbilder 11, 11' zu verdeutlichen. In jedem Druckwerk 1, 2, 3, 4, 5 wird mit bildgebenden Zylindern 26, 27 auch Formatzylinder genannt, eine Teilfarbe des Druckbildes 11, 11' auf den Bedruckstoff 9 gedruckt. Am stromabwärtigen Ende der Druckmaschine 6 ist durch Übereinanderdrucken der verschiedenen Teilfarben der Druckwerke 1, 2, 3, 4, 5 das mehrfarbige Druckbild 11, 11' erzeugt.In FIG. 2 is schematically a printing press 6 with five printing units 1, 2, 3, 4, 5, namely a first printing unit 1 and four other printing units 2, 3, 4, 5 shown. In a running direction 12, a printing substrate 9 is passed through the printing machine 6 and passes a printing unit 1, 2, 3, 4, 5 after the other. Two webs 13, 13 'of the printing material 9 are in FIG. 1 in a view from above, to illustrate their division into sections by printed images 11, 11 '. In each printing unit 1, 2, 3, 4, 5 is also called form cylinder with imaging cylinders 26, 27, a partial color of the printed image 11, 11 'printed on the substrate 9. At the downstream end of the printing press 6, the multi-color print image 11, 11 'is produced by printing the different partial colors of the printing units 1, 2, 3, 4, 5 over one another.

Die Druckwerke 1, 2, 3, 4, 5 gemäß Figur 2 weisen vertikal übereinander jeweils zwei bildgebende Zylinder 26, 27 auf, nämlich einen oberhalb angeordneten Plattenzylinder 26a und einen unterhalb angeordneten Gummituchzylinder 27a, unter dem wiederum ein Gegendruckzylinder 28 positioniert ist. Der Bedruckstoff 9 wird zwischen dem Gummituchzylinder 27a und dem Gegendruckzylinder 28a in Laufrichtung 12 transportiert. Das Druckbild 11, 11' entsteht zunächst oberhalb des Bedruckstoffs 9 durch das Aufeinanderabrollen des Plattenzylinders 26a auf dem Gummituchzylinder 27a. Diese bildgebenden Zylinder 26, 27 drehen mit gleicher Drehzahl und werden gemeinsam je nach gewünschter Länge des Druckbildes 11, 11' mit der Geschwindigkeit des Bedruckstoffs 9 oder schneller bzw. langsamer als diese Geschwindigkeit betrieben. Es kommt schließlich zu einem Abrollen des Gummituchzylinders 27a auf dem Bedruckstoff 9, wodurch das Druckbild 11, 11' auf letzteren übertragen wird. Drehen der Plattenzylinder 26a und der Gummituchzylinder 27a mit konstanter Drehzahl aber leicht langsamer als die Bahn 13, 13'des Bedruckstoffs 9, entsteht ein leicht verlängertes Druckbild. Die Drehzahl des Gegendruckzylinders 28 auf der anderen Seite der Bahn 13, 13' des Bedruckstoffs 9 bleibt dabei unverändert.The printing units 1, 2, 3, 4, 5 according to FIG. 2 have vertically each other two imaging cylinders 26, 27, namely a plate cylinder arranged above 26a and a rubber blanket cylinder arranged below 27a, below which in turn an impression cylinder 28 is positioned. The printing material 9 is between the blanket cylinder 27a and the impression cylinder 28a in the direction of the twelfth transported. The print image 11, 11 'is initially formed above the printing material 9 by the successive unrolling of the plate cylinder 26a on the blanket cylinder 27a. These imaging cylinders 26, 27 rotate at the same speed and are operated jointly depending on the desired length of the print image 11, 11 'at the speed of the printing material 9 or faster or slower than this speed. Finally, there is a rolling of the blanket cylinder 27a on the substrate 9, whereby the printed image 11, 11 'is transferred to the latter. Turning the plate cylinder 26a and the blanket cylinder 27a at a constant speed but slightly slower than the web 13, 13 'of the printing material 9, creates a slightly prolonged printed image. The speed of the impression cylinder 28 on the other side of the web 13, 13 'of the printing material 9 remains unchanged.

Diese Drehzahlvariation gilt für alle Druckwerke 1, 2, 3, 4, 5 in gleichem Maße bzw. der gleichen Drehzahldifferenz. Jedes Druckwerk 1, 2, 3, 4, 5 ist mit einer individuellen Rotationsgeschwindigkeit ω direkt mit einem eigenen Antriebssystem 31, 32, 33, 34, 35 oder indirekt über nicht dargestellte Antriebswalzen antreibbar.This speed variation applies to all printing units 1, 2, 3, 4, 5 to the same extent or the same speed difference. Each printing unit 1, 2, 3, 4, 5 can be driven with an individual rotational speed ω directly with its own drive system 31, 32, 33, 34, 35 or indirectly via drive rollers, not shown.

In Laufrichtung 12 des Bedruckstoffs 9 betrachtet, ist vor einem ersten Druckwerk 1 eine Markierungseinrichtung 10 vorgesehen. Alternativ kann die Markierungseinrichtung 10 auch im ersten Druckwerk 1 angeordnet werden.Viewed in the direction 12 of the printing material 9, a marking device 10 is provided in front of a first printing unit 1. Alternatively, the marking device 10 can also be arranged in the first printing unit 1.

Beim Anschalten der Druckmaschine 6 oder bei einer Konfigurationsänderung, d.h. beispielsweise bei einer Änderung der Bahnführung zwischen den Druckwerken 1, 2, 3, 4, 5, appliziert die Markierungseinrichtung 10 eine Markierung 8 auf dem Bedruckstoff 9. Demnach muss eine Ermittlung der Länge des zwischen den Druckwerken 1, 2, 3, 4, 5 vorhandenen Bedruckstoffs 9 nur einmal vorgenommen und erst dann wiederholt werden, wenn die tatsächliche Länge des Bedruckstoffs 9 zwischen den Druckwerken 1, 2, 3, 4, 5 verändert wird.When the printing machine 6 is switched on or during a configuration change, i. For example, when changing the web guide between the printing units 1, 2, 3, 4, 5, the marking device 10 applies a mark 8 on the substrate 9. Accordingly, a determination of the length of between the printing units 1, 2, 3, 4, 5 existing substrate 9 only once made and only be repeated when the actual length of the printing material 9 between the printing units 1, 2, 3, 4, 5 is changed.

In Laufrichtung 12 des Bedruckstoffs 9 betrachtet, ist hinter den Druckwerken 1, 2, 3, 4, 5 jeweils ein Sensor 21, 22, 23, 24, 25 angeordnet und beispielsweise als Lichtschranke ausgebildet. Die Sensoren 21, 22, 23, 24, 25 erzeugen ein Signal, sobald die Markierung 8 ihre Position erreicht und leiten dieses Signal an eine mit den Antriebssystemen 31, 32, 33, 34, 35 der Druckwerke 1, 2, 3, 4, 5 verbundene Steuereinrichtung 29 weiter. Zwischen einem Druckwerk 1, 2, 3, 4, 5 und dem jeweils nachfolgend angeordneten Sensor 21, 22, 23, 24, 25 besteht ein bekannter Abstand s. Innerhalb dieses Abstands s befindet sich ein Abschnitt definierter Länge des Bedruckstoffs 9.Viewed in the direction 12 of the printing material 9, behind the printing units 1, 2, 3, 4, 5 each have a sensor 21, 22, 23, 24, 25 arranged and formed, for example, as a light barrier. The sensors 21, 22, 23, 24, 25 generate a signal as soon as the marking 8 reaches its position and forward this signal to a control device 29 connected to the drive systems 31, 32, 33, 34, 35 of the printing units 1, 2, 3, 4, 5. Between a printing unit 1, 2, 3, 4, 5 and the respectively subsequently arranged sensor 21, 22, 23, 24, 25 there is a known distance s. Within this distance s is a section of defined length of the printing material 9.

Natürlich können die Sensoren 21, 22, 23, 24, 25 auch im jeweiligen Druckwerk 1, 2, 3, 4, 5 angeordnet und auch zur Erkennung von Bahnrissen des Bedruckstoffs 9 verwendet werden. Die Steuereinrichtung 29 kann auch durch die Druckmaschinensteuerung gebildet werden.Of course, the sensors 21, 22, 23, 24, 25 in the respective printing unit 1, 2, 3, 4, 5 are arranged and also used to detect web breaks of the printing material 9. The control device 29 can also be formed by the printing press control.

Die Bahn 13, 13' des Bedruckstoffs 9 hat zwischen dem ersten Druckwerk 1 und dem zweiten Druckwerk 2 eine erste Länge I12. Entsprechend sind den in Laufrichtung 12 nachfolgenden Zwischenräumen zwischen den Druckwerken 2, 3, 4, 5 eine zweite Länge I23, eine dritte Länge I34 und eine vierte Länge I45 der Bahn 13, 13' des Bedruckstoffs 9 zuzuordnen. Insbesondere bei Produktionsumstellungen können diese Längen I12, I23, I34, I45 der Bahn 13, 13' des Bedruckstoffs 9 variieren.The web 13, 13 'of the printing material 9 has a first length I 12 between the first printing unit 1 and the second printing unit 2. Accordingly, the following in the direction 12 interspaces between the printing units 2, 3, 4, 5, a second length I 23 , a third length I 34 and a fourth length I 45 of the web 13, 13 'of the printing material 9 assign. In particular, during production changes, these lengths I 12 , I 23 , I 34 , I 45 of the web 13, 13 'of the printing substrate 9 vary.

Eine derartige Druckmaschine 6 ist in der Lage, die jeweilige Länge I12, I23, I34, I45 der Bahn 13, 13' des Bedruckstoffs 9 zwischen den Druckwerken 1, 2, 3, 4, 5 mittels der Sensoren 21, 22, 23, 24, 25 und der Steuereinrichtung 29 zu bestimmen, insbesondere auch bei Umstellungen während des Maschinenlaufs.Such a printing press 6 is capable of the respective length I 12 , I 23 , I 34 , I 45 of the web 13, 13 'of the printing substrate 9 between the printing units 1, 2, 3, 4, 5 by means of the sensors 21, 22nd , 23, 24, 25 and the controller 29 to determine, especially during changes during the machine run.

Nachdem die Druckmaschine 6 angeschaltet worden ist oder nachdem deren Konfiguration unter Änderung der Länge der Bahn 13, 13' des Bedruckstoffs 9 zwischen zwei Druckwerken 1, 2, 3, 4, 5 verändert wurde, erfolgt zunächst eine Freigabe zum Messen, d.h. zum Ermitteln der neuen Länge der Bahn 13, 13' des Bedruckstoffs 9 zwischen den Druckwerken 1, 2, 3, 4, 5. Dem Ablauf gemäß Figur 3 folgend wird danach die Markierung 8 auf dem Bedruckstoff 9 aufgebracht. Natürlich kann die Markierung 8 auch in den Bedruckstoff 9 appliziert werden. Anschließend werden die aufgrund der den jeweiligen Sensor 21, 22, 23, 24, 25 passierenden Markierung 8 erfassten Signale der Sensoren 21, 22, 23, 24, 25 in der Steuereinrichtung 29 ausgewertet. Diese kennt den Abstand s des Druckwerkes 1, 2, 3, 4, 5 zu dem jeweils nachfolgend angeordneten Sensor 21, 22, 23, 24, 25, jedoch nicht notwendigerweise auch den Abstand des ersten Druckwerks 1 zur Markierungseinrichtung 10. Aus den Signalen der Sensoren 21, 22, 23, 24, 25 und den bekannten Abständen s werden in der Steuereinrichtung 29 die aktuellen Längen I12, I23, I34, I45 des Bedruckstoffs 9 zwischen den Druckwerken 1, 2, 3, 4, 5 ermittelt und gesichert, d.h. abgespeichert. Zudem erzeugt die Steuereinrichtung 29 ein Signal zur Änderung der Registereinstellungen der weiteren Druckwerke 2, 3, 4, 5 und gibt dieses an die jeweiligen Antriebssysteme 32, 33, 34, 35 weiter. Eine mit dem ersten und dem zweiten Sensor 21, 22 durchgeführte Messung führt nach Auswertung der auf den Messergebnissen beruhenden und an die Steuereinrichtung 29 übermittelten Signale zumindest zu einer entsprechenden Beeinflussung der Registereinstellungen des zweiten Druckwerks 2. Außerdem erfolgt eine Freigabe zum Drucken. Anschliessend warten die Steuereinrichtung 29 und die Antriebssysteme 31, 32, 33, 34, 35 auf das nächste Anschalten oder die nächste Konfigurationsänderung der Druckmaschine 6.After the printing machine 6 has been switched on or after its configuration has been changed by changing the length of the web 13, 13 'of the printing substrate 9 between two printing units 1, 2, 3, 4, 5, first a release for measuring, ie for determining the new length of the web 13, 13 'of the printing material 9 between the printing units 1, 2, 3, 4, 5. The sequence according to FIG. 3 following the mark 8 is then applied to the substrate 9. Of course, the mark 8 can also be applied in the substrate 9. Subsequently, the due to the respective sensor 21, 22, 23, 24, 25 passing mark 8 detected signals of the sensors 21, 22, 23, 24, 25 evaluated in the control device 29. This knows the distance s of the printing unit 1, 2, 3, 4, 5 to the respective subsequently arranged sensor 21, 22, 23, 24, 25, but not necessarily the distance of the first printing unit 1 to the marking device 10. From the signals of Sensors 21, 22, 23, 24, 25 and the known distances s in the control device 29, the current lengths I 12 , I 23 , I 34 , I 45 of the printing material 9 between the printing units 1, 2, 3, 4, 5 determined and saved, ie stored. In addition, the control device 29 generates a signal for changing the register settings of the further printing units 2, 3, 4, 5 and outputs this to the respective drive systems 32, 33, 34, 35 on. A measurement carried out with the first and the second sensor 21, 22 leads, after evaluation of the signals based on the measurement results and transmitted to the control device 29, at least to a corresponding influence on the register settings of the second printing unit 2. In addition, a release for printing takes place. Subsequently, the control device 29 and the drive systems 31, 32, 33, 34, 35 wait for the next start-up or the next configuration change of the printing machine 6.

In Figur 1 sind zum Vergleich zwei Bahnen 13, 13' des Bedruckstoffs 9 parallel zueinander ausgelegt dargestellt. Die erste Bahn 13 hat eine Gesamtlänge L. Auf dieser Bahn 13 finden fünf gleiche Druckbilder 11 mit einer Länge I Platz. Die zweite Bahn 13' des Bedruckstoffs 9 unterscheidet sich von der ersten Bahn 13 des Bedruckstoffs 9 durch eine Änderung der Länge der Druckbilder 11, 11'. Im dargestellten Fall gemäß Figur 1 ist die resultierende Gesamtlänge L' der fünf dargestellten Druckbilder 11' der zweiten Bahn 13' mit je einer Länge I' insgesamt deutlich kürzer als die der ersten Bahn 13.In FIG. 1 For comparison, two webs 13, 13 'of the printing material 9 are shown configured parallel to each other. The first track 13 has a total length L. On this track 13 find five identical printed images 11 with a length I space. The second web 13 'of the printing substrate 9 differs from the first web 13 of the printing substrate 9 by a change in the length of the printed images 11, 11'. In the case shown in accordance with FIG. 1 the resulting total length L 'of the five printed images 11' of the second web 13 ', each having a length I', is overall significantly shorter than that of the first web 13.

In Figur 1 ist somit eine vom Maschinenführer vorgegebene Längenänderung ΔI1 der Druckbilder 11, 11' als Differenz der Länge I der Druckbilder 11 zur Länge I' der Druckbilder 11' ablesbar. Es wird deutlich, dass durch eine solche Längenänderung bei jedem der fünf im Zwischenraum zwischen jeweils zwei Druckwerken 1, 2, 3, 4, 5 befindlichen Druckbilder 11, 11' nach dem fünften Druckbild 11, 11' insgesamt eine vierfache Längenänderung ΔI4 der Bahn 13' gegenüber der Bahn 13 oder umgekehrt erreicht wird.In FIG. 1 is thus a specified by the machine operator change in length ΔI 1 of the printed images 11, 11 'as the difference of the length I of the printed images 11 to the length I' of the printed images 11 'readable. It is clear that by such a change in length in each of the five located in the space between each two printing units 1, 2, 3, 4, 5 printed images 11, 11 'after the fifth printed image 11, 11' a total four times the change in length ΔI 4 of the web 13 'with respect to the web 13 or vice versa is achieved.

Figur 4 verdeutlicht den Ablauf beim Ausführen einer Korrektur des Registers in Abhängigkeit von der Druckbildlänge. Ist gemäß einem erfindungsgemäßen Verfahren die Länge I12, I23, I34, I45 zwischen den Druckwerken 1, 2, 3, 4, 5 bestimmt und die Länge der Druckbilder 11, 11' bekannt, steht für die Steuereinrichtung 29 fest, wie viele Druckbilder 11, 11' sich zwischen zwei Druckwerken 1, 2, 3, 4, 5 befinden. Basierend auf der Anzahl der Druckbilder 11, 11' in zwei benachbarten Druckwerken 1, 2, 3, 4, 5 wird mit einer vom Maschinenführer vorgegebenen Längenänderung ΔI1 des Druckbildes 11, 11' eine Korrektur für die Registereinstellungen berechnet und von der Steuereinrichtung 29 an die zu korrigierenden, weiteren Druckwerke 2, 3, 4, 5 bzw. deren Antriebssysteme 32, 33, 34, 35 ausgegeben. Auf diese Weise bleibt die vor der Druckbildlängenänderung im Register befindliche Druckmaschine 6 auch weiterhin im Register. FIG. 4 illustrates the process when performing a correction of the register as a function of the print image length. If, according to a method according to the invention, the length I 12 , I 23 , I 34 , I 45 between the printing units 1, 2, 3, 4, 5 determined and the length of the printed images 11, 11 'known, stands for the controller 29 as many printed images 11, 11 'are located between two printing units 1, 2, 3, 4, 5. Based on the number of printed images 11, 11 'in two adjacent printing units 1, 2, 3, 4, 5, a correction for the register settings is calculated by the control device 29 with a change in length ΔI 1 of the printed image 11, 11' specified by the machine operator to be corrected, further printing units 2, 3, 4, 5 and their drive systems 32, 33, 34, 35 output. In this way, the printing machine 6 located in the register before the printing image length change remains in the register.

Gemäß Figur 2 weisen die Druckwerke 1, 2, 3, 4, 5 jeweils einen am Antriebssystem 31, 32, 33, 34, 35 angeordneten Impulsgeber 30 auf. Mit den Impulsgebern 30 ist die Winkellage zumindest eines der Druckwerke 1, 2, 3, 4, 5 erfassbar und an das Antriebssystem 31, 32, 33, 34, 35 sowie an die Steuereinrichtung 29 weiterleitbar. Aus der ermittelten Winkellage wird ein Signal erzeugt, welches in der Steuereinrichtung 29 gemeinsam mit den die Länge I12, I23, I34, I45 des Bedruckstoffs 9 zwischen den jeweils benachbarten Druckwerken 1, 2, 3, 4, 5 betreffenden Signalen ausgewertet wird, wobei die Registereinstellungen des zumindest einen bildgebenden Zylinders 26, 27 der weiteren Druckwerke 2, 3, 4, 5 entsprechend der erfolgten Auswertung verändert werden.According to FIG. 2 If the printing units 1, 2, 3, 4, 5 each have a pulse generator 30 arranged on the drive system 31, 32, 33, 34, 35. With the pulse generators 30, the angular position of at least one of the printing units 1, 2, 3, 4, 5 can be detected and forwarded to the drive system 31, 32, 33, 34, 35 and to the control device 29. From the determined angular position, a signal is generated, which is evaluated in the control device 29 together with the length I 12 , I 23 , I 34 , I 45 of the printing material 9 between the respective adjacent printing units 1, 2, 3, 4, 5 relevant signals is, wherein the register settings of the at least one imaging cylinder 26, 27 of the other printing units 2, 3, 4, 5 are changed according to the evaluation.

Claims (18)

Verfahren zur Registersteuerung einer Druckmaschine (6) mit einem ersten Druckwerk (1, 2, 3, 4) und zumindest einem weiteren Druckwerk (2, 3, 4, 5), welche jeweils zumindest einen bildgebenden Zylinder (26, 27) mit einer Rotationsgeschwindigkeit (ω) aufweisen, wobei zum Vermeiden eines Auseinanderlaufens von Druckbildern (11, 11') mehrerer Druckwerke (1, 2, 3, 4, 5) Registereinstellungen des zumindest einen bildgebenden Zylinders (26, 27) der weiteren Druckwerke (2, 3, 4, 5) entsprechend einer vorgegebenen Längenänderung (ΔI1) eines Druckbildes (11, 11') verändert werden, dadurch gekennzeichnet, dass die Veränderung der Registereinstellungen in Abhängigkeit von zumindest einer Länge (I12, I23, I34, I45) eines Bedruckstoffs (9) zwischen den Druckwerken (1, 2, 3, 4, 5) durchgeführt wird.Method for register control of a printing machine (6) with a first printing unit (1, 2, 3, 4) and at least one further printing unit (2, 3, 4, 5), each having at least one imaging cylinder (26, 27) with a rotational speed (ω), in order to avoid a divergence of printed images (11, 11 ') of several printing units (1, 2, 3, 4, 5) register settings of the at least one imaging cylinder (26, 27) of the further printing units (2, 3, 4, 5) according to a predetermined change in length (.DELTA.I 1 ) of a printed image (11, 11 ') to be changed, characterized in that the change of the register settings in dependence on at least one length (I 12 , I 23 , I 34 , I 45 ) a printing material (9) between the printing units (1, 2, 3, 4, 5) is performed. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Veränderung der Registereinstellungen während des laufenden Betriebs der Druckmaschine (6) erfolgt, wobei die vorgegebene Längenänderung (ΔI1) eines Druckbildes (11, 11') durch eine Änderung der Rotationsgeschwindigkeit (ω) des zumindest einen bildgebenden Zylinders (26, 27) der weiteren Druckwerke (2, 3, 4, 5) gegenüber einer Geschwindigkeit des Bedruckstoffs (9) realisiert wird.A method according to claim 1, characterized in that the change of the register settings during operation of the printing machine (6), wherein the predetermined change in length (.DELTA.I 1 ) of a printed image (11, 11 ') by a change in the rotational speed (ω) of at least an imaging cylinder (26, 27) of the further printing units (2, 3, 4, 5) relative to a speed of the printing material (9) is realized. Verfahren nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die Registereinstellungen des zumindest einen bildgebenden Zylinders (26, 27) der weiteren Druckwerke (2, 3, 4, 5) korrigiert werden, wobei eine Korrektur der Länge (I12, I23, I34, I45) des Bedruckstoffs (9) in Bezug zu einer Referenzposition in der Druckmaschine (6) erfolgt.Method according to one of claims 1 or 2, characterized in that the register settings of the at least one imaging cylinder (26, 27) of the further printing units (2, 3, 4, 5) are corrected, wherein a correction of the length (I 12 , I 23 , I 34 , I 45 ) of the printing material (9) with respect to a reference position in the printing machine (6). Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass das erste in einer Laufrichtung (12) des Bedruckstoffs (9) am Druckprozess beteiligte Druckwerk (1, 2, 3, 4) die Referenzposition definiert.A method according to claim 3, characterized in that the first in a running direction (12) of the printing substrate (9) involved in the printing process printing unit (1, 2, 3, 4) defines the reference position. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Veränderung der Registereinstellungen des zumindest einen bildgebenden Zylinders (26, 27) durch eine Multiplikation der Längenänderung (ΔI1) des Druckbildes (11, 11') mit einer Anzahl der Druckbilder (11, 11') zwischen den jeweils benachbarten Druckwerken (1, 2, 3, 4, 5) ermittelt wird, wobei die Anzahl der Druckbilder (11, 11') durch Dividieren der Länge (I12, I23, I34, I45) des Bedruckstoffs (9) zwischen den jeweils benachbarten Druckwerken (1, 2, 3, 4, 5) durch eine Länge (I, I') eines Druckbildes (11, 11') in einer Laufrichtung (12) des Bedruckstoffs (9) ermittelt wird.Method according to one of claims 1 to 4, characterized in that the change of the register settings of the at least one imaging cylinder (26, 27) by a multiplication of the change in length (.DELTA.I 1 ) of the printed image (11, 11 ') with a number of printed images ( 11, 11 ') between the respective adjacent printing units (1, 2, 3, 4, 5) is determined, wherein the number of printed images (11, 11') by dividing the length (I 12 , I 23 , I 34 , I 45 ) of the printing material (9) between the respectively adjacent printing units (1, 2, 3, 4, 5) by a length (I, I ') of a printed image (11, 11') in a running direction (12) of the printing material (9 ) is determined. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Länge (I12, I23, I34, I45) des Bedruckstoffs (9) zwischen den jeweils benachbarten Druckwerken (1, 2, 3, 4, 5) durch eine Auswertung mindestens eines Signals von zumindest zwei Sensoren (21, 22, 23, 24, 25) ermittelt wird.Method according to one of claims 1 to 5, characterized in that the length (I 12 , I 23 , I 34 , I 45 ) of the printing material (9) between the respective adjacent printing units (1, 2, 3, 4, 5) by an evaluation of at least one signal from at least two sensors (21, 22, 23, 24, 25) is determined. Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass die Sensoren (21, 22, 23, 24, 25) das Signal ausgeben, wenn sie eine Markierung (8) des Bedruckstoffs (9) erkennen.A method according to claim 6, characterized in that the sensors (21, 22, 23, 24, 25) output the signal when they recognize a mark (8) of the printing material (9). Verfahren nach Anspruch 7, dadurch gekennzeichnet, dass die Markierung (8) mit einer Markierungseinrichtung (10) vor oder in dem ersten Druckwerk (1, 2, 3, 4) auf oder in den Bedruckstoff (9) appliziert wird, insbesondere durch Stempeln, Lochen, Farbauftragen oder Bekleben.A method according to claim 7, characterized in that the marking (8) with a marking device (10) before or in the first printing unit (1, 2, 3, 4) is applied to or in the printing material (9), in particular by stamping, Punching, painting or pasting. Verfahren nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, dass als Sensoren (21, 22, 23, 24, 25) Lichtschranken verwendet werden.Method according to one of claims 6 to 8, characterized in that sensors are used as sensors (21, 22, 23, 24, 25). Verfahren nach einem der Ansprüche 6 bis 9, dadurch gekennzeichnet, dass die Länge (I12, I23, I34, I45) des Bedruckstoffs (9) zwischen den jeweils benachbarten Druckwerken (1, 2, 3, 4, 5) mit einer Genauigkeit kleiner 0,2 mm ermittelt wird.Method according to one of claims 6 to 9, characterized in that the length (I 12 , I 23 , I 34 , I 45 ) of the printing substrate (9) between the respective adjacent printing units (1, 2, 3, 4, 5) with an accuracy of less than 0.2 mm is determined. Verfahren nach einem der Ansprüche 6 bis 10, dadurch gekennzeichnet, dass eine Winkellage zumindest eines der Druckwerke (1, 2, 3, 4, 5) mittels eines in einem Antriebssystem (31, 32, 33, 34, 35), insbesondere in einem Servoantriebssystem, des zumindest einen Druckwerkes (1, 2, 3, 4, 5) angeordneten Impulsgebers (30) ermittelt und daraus ein Signal erzeugt wird, welches gemeinsam mit den die Länge (I12, I23, I34, I45) des Bedruckstoffs (9) zwischen den jeweils benachbarten Druckwerken (1, 2, 3, 4, 5) betreffenden Signalen ausgewertet wird, wobei die Registereinstellungen des zumindest einen bildgebenden Zylinders (26, 27) der weiteren Druckwerke (2, 3, 4, 5) entsprechend der erfolgten Auswertung verändert werden.Method according to one of claims 6 to 10, characterized in that an angular position of at least one of the printing units (1, 2, 3, 4, 5) by means of a drive system (31, 32, 33, 34, 35), in particular in a Servo drive system, the at least one printing unit (1, 2, 3, 4, 5) arranged pulse generator (30) determined and from which a signal is generated, which together with the length (I 12 , I 23 , I 34 , I 45 ) of the Substrate (9) between the respective adjacent printing units (1, 2, 3, 4, 5) is evaluated signals, the register settings of the at least one imaging cylinder (26, 27) of the other printing units (2, 3, 4, 5) be changed according to the evaluation. Vorrichtung zur Registersteuerung einer Druckmaschine (6) mit einem ersten Druckwerk (1, 2, 3, 4) und zumindest einem weiteren Druckwerk (2, 3, 4, 5), welche jeweils zumindest einen mit einer Rotationsgeschwindigkeit (ω) umlaufenden, bildgebenden Zylinder (26, 27) zum Bedrucken eines Bedruckstoffs (9) aufweisen, mit der zum Vermeiden eines Auseinanderlaufens von Druckbildern (11, 11') mehrerer Druckwerke (1, 2, 3, 4, 5) Registereinstellungen des zumindest einen bildgebenden Zylinders (26, 27) der weiteren Druckwerke (2, 3, 4, 5) veränderbar sind, dadurch gekennzeichnet, dass die Vorrichtung eine Steuereinrichtung (29) und jeweils zumindest ein Antriebssystem (31, 32, 33, 34, 35), insbesondere ein Servoantriebssystem, sowie jeweils zumindest einen Sensor (21, 22, 23, 24, 25) für die Druckwerke (1, 2, 3, 4. 5) aufweist, wobei mit dem zumindest einen Sensor (21, 22, 23, 24, 25) eine Markierung (8) des Bedruckstoffs (9) erfassbar, ein entsprechendes Signal generierbar und an die Steuereinrichtung (29) weiterleitbar ist, wobei mittels der Steuereinrichtung (29) aus den empfangenen Signalen die Länge (I12, I23, I34, I45) eines Bedruckstoffs (9) zwischen den Druckwerken (1, 2, 3, 4, 5) ermittelbar und wobei mit den Antriebssystemen (31, 32, 33, 34, 35) in Abhängigkeit dieser Länge (I12, I23, I34, I45) die Registereinstellungen des zumindest einen bildgebenden Zylinders (26, 27) der weiteren Druckwerke (2, 3, 4, 5) veränderbar sind.Device for register control of a printing press (6) with a first printing unit (1, 2, 3, 4) and at least one further printing unit (2, 3, 4, 5), each having at least one with a rotational speed (ω) rotating, imaging cylinder (26, 27) for printing on a printing material (9), with which to avoid a divergence of printed images (11, 11 ') of several printing units (1, 2, 3, 4, 5) register settings of the at least one imaging cylinder (26, 27) of the further printing units (2, 3, 4, 5) are variable, characterized in that the device comprises a control device (29) and in each case at least one drive system (31, 32, 33, 34, 35), in particular a servo drive system, and in each case at least one sensor (21, 22, 23, 24, 25) for the printing units (1, 2, 3, 4. 5), wherein with the at least one sensor (21, 22, 23, 24, 25) a mark (8) of the printing material (9) detectable, a corresponding signal can be generated and sent to the controller device (29) can be forwarded, wherein by means of the control device (29) from the received signals, the length (I 12 , I 23 , I 34 , I 45 ) of a printing material (9) between the printing units (1, 2, 3, 4, 5) can be determined and with the drive systems (31, 32, 33, 34, 35) as a function of this length (I 12 , I 23 , I 34 , I 45 ) the register settings of the at least one imaging cylinder (26, 27) of the other Printing units (2, 3, 4, 5) are changeable. Vorrichtung nach Anspruch 12, dadurch gekennzeichnet, dass der zumindest eine Sensor (21, 22, 23, 24, 25), jeweils an den Druckwerken (1, 2, 3, 4, 5) oder in einer Laufrichtung (12) des Bedruckstoffs (9) jeweils hinter den Druckwerken (1, 2, 3, 4, 5) angeordnet ist.Apparatus according to claim 12, characterized in that the at least one sensor (21, 22, 23, 24, 25), in each case at the printing units (1, 2, 3, 4, 5) or in a running direction (12) of the printing substrate ( 9) in each case behind the printing units (1, 2, 3, 4, 5) is arranged. Vorrichtung nach einem der Ansprüche 12 oder 13, dadurch gekennzeichnet, dass der zumindest eine Sensor (21, 22, 23, 24, 25) als Lichtschranke ausgebildet ist.Device according to one of claims 12 or 13, characterized in that the at least one sensor (21, 22, 23, 24, 25) is designed as a light barrier. Vorrichtung nach einem der Ansprüche 12 bis 14, dadurch gekennzeichnet, dass die Vorrichtung eine Markierungseinrichtung (10) aufweist, die in Laufrichtung (12) des Bedruckstoffs (9) vor oder in einem ersten Druckwerk (1) angeordnet ist.Device according to one of claims 12 to 14, characterized in that the device comprises a marking device (10) which is arranged in the running direction (12) of the printing material (9) before or in a first printing unit (1). Vorrichtung nach Anspruch 15, dadurch gekennzeichnet, dass mittels der Markierungseinrichtung (10) vor oder in dem ersten Druckwerk (1, 2, 3, 4) eine Markierung auf oder in den Bedruckstoff (9) applizierbar ist, insbesondere ein Abdruck eines Stempels, eine Lochung, ein Farbauftrag oder eine Beklebung.Apparatus according to claim 15, characterized in that by means of the marking device (10) before or in the first printing unit (1, 2, 3, 4) a mark on or in the printing material (9) can be applied, in particular an impression of a stamp, a Punching, a paint job or a sticker. Vorrichtung nach einem der Ansprüche 12 bis 16, dadurch gekennzeichnet, dass sie zumindest einen insbesondere am Antriebssystem (31, 32, 33, 34, 35) angeordneten Impulsgeber (30) aufweist, mit dem die Winkellage zumindest eines der Druckwerke (1, 2, 3, 4, 5) erfassbar und an die Steuereinrichtung (29) sowie das Antriebssystem (31, 32, 33, 34, 35) weiterleitbar ist.Device according to one of claims 12 to 16, characterized in that it comprises at least one particular on the drive system (31, 32, 33, 34, 35) arranged pulse generator (30), with which the angular position of at least one of the printing units (1, 2, 3, 4, 5) detectable and to the control device (29) and the drive system (31, 32, 33, 34, 35) can be forwarded. Druckmaschine mit einer Vorrichtung nach einem der Ansprüche 12 bis 17.Printing machine with a device according to one of claims 12 to 17.
EP11167679.7A 2010-06-02 2011-05-26 Method and device for register control of a printing press Not-in-force EP2392459B1 (en)

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EP2392459B1 (en) 2015-09-02
US20110297026A1 (en) 2011-12-08
CN102285215A (en) 2011-12-21
US9010242B2 (en) 2015-04-21
BRPI1102819A2 (en) 2012-11-20
JP2011251533A (en) 2011-12-15

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