EP2331330B1 - Method for operating a printing machine - Google Patents

Method for operating a printing machine Download PDF

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Publication number
EP2331330B1
EP2331330B1 EP09782540.0A EP09782540A EP2331330B1 EP 2331330 B1 EP2331330 B1 EP 2331330B1 EP 09782540 A EP09782540 A EP 09782540A EP 2331330 B1 EP2331330 B1 EP 2331330B1
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EP
European Patent Office
Prior art keywords
ink
printing
inking
printed
couple
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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.)
Not-in-force
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EP09782540.0A
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German (de)
French (fr)
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EP2331330A1 (en
Inventor
Rainer Gebhardt
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Manroland Sheetfed GmbH
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Manroland Sheetfed GmbH
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Publication of EP2331330A1 publication Critical patent/EP2331330A1/en
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Publication of EP2331330B1 publication Critical patent/EP2331330B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0036—Devices for scanning or checking the printed matter for quality control
    • B41F33/0045—Devices for scanning or checking the printed matter for quality control for automatically regulating the ink supply
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/04—Ducts, containers, supply or metering devices with duct-blades or like metering devices
    • B41F31/045—Remote control of the duct keys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2233/00—Arrangements for the operation of printing presses
    • B41P2233/10—Starting-up the machine
    • B41P2233/11—Pre-inking

Definitions

  • the invention relates to a method for operating a printing press, namely for detecting and adapting a basic setting of ink zone setting elements of the inking unit of at least one printing unit of the printing press.
  • a printing ink is applied to the substrate.
  • the four scale colors black, magenta, cyan and yellow and, if appropriate, spot colors are generally printed, with a separate printing unit and therefore inking unit being present for each of these printing inks.
  • the inking unit of each printing unit has a Farbdosier driving, wherein the Farbdosier driving comprises a number of ink zones corresponding number of Farbzonenstellelementen.
  • the Farbzonenstellelemente are also referred to as a color slider or color meter.
  • printing ink is applied to a ductor roller and several of the ink fountain roller downstream inking rollers on a printing plate.
  • a learning color guide known. It describes a method for controlling printing presses, in particular for correcting incorrect settings or optimizing color guidance at the start of printing of a print job.
  • the set values for the ink feed and the ink metering which comprise the ink zone opening and the color strip width, are determined and transmitted to control means of the printing press.
  • the color guide is preset by means of previously stored print settings stored on the machine and corrected to optimize the print results for each print job. To determine the necessary corrections, an optical measurement of the color of a sample sheet should be made. The corrected setting values are saved for subsequent print jobs.
  • the present invention is based on the problem of providing a novel method for operating a printing press, namely for detecting and adapting a basic setting of ink zone setting elements of inking units of the printing press.
  • the inventive method comprises at least the following steps: a) it is a Provided with a printing unit ready for printing, wherein all Farbzonenstellelemente of the ready-to-print inking unit are set to an identical, predefined basic setting; b) at least one test print is printed with the dampening unit deactivated; c) at least one test pressure is measured, namely such that a color density is measured in each color zone of the test print in order to measure the basic setting of the ink zone actuator of each ink zone of the inking unit; d) the color densities of all color zones of the inking unit measured by a test pressure are compared with one another, the basic settings of the ink zone setting elements of the inking unit being changed as a result, until an identical color density results for each color zone.
  • the position accuracy of ink zone setting elements can be checked easily and reliably.
  • a basic setting of the ink zone setting elements is detected and adjusted so that when the ink zone setting elements of an inking unit occupy identical positions or positions, identical color densities also occur in the corresponding color zones of a printed print image.
  • the inventive method can be carried out fully automated or semi-automated.
  • Each printing unit of a printing press has, in addition to a transfer cylinder, which carries a transfer form, and a forme cylinder, which carries a printing form, via an inking unit, wherein ink is applied to the printing forme positioned on the forme cylinder with the aid of the inking unit.
  • an inking unit has a Farbdosier noticed and several inking rollers to apply the ink to the printing form.
  • the ink metering device of an inking unit has u. a. via an ink fountain and Farbzonenstellelemente, wherein for each color zone, a Farbzonenstellelement is present to set for each color zone, the amount of ink applied to the printing form by means of the inking unit individually.
  • the Farbzonenstellelemente are also referred to as a color slider or color meter.
  • the invention now proposes a method with the aid of which the positional accuracy of the inking zone adjusting elements can be checked, namely by detecting and adjusting a so-called basic setting of the inking zone adjusting elements, so that ultimately when all the inking element actuating elements of an inking unit have an identical setting or position assume that an identical color density is provided in all color zones of the printed printed image.
  • a printing unit is provided with a ready-to-print inking unit, wherein all Farbzonenstellelemente the print-ready inking unit are set to an identical, predefined basic setting.
  • this defined basic setting it may be z. B. to act as the so-called zero position of the Farbzonenstellelemente.
  • this setting of the ink fountain keys to an identical, predefined basic setting is preferably carried out so that the Farbzonenstellelemente the inking be brought from the same direction in the default, namely such that either all Farbzonenstellelemente starting from a more open state of the same or starting from a stronger closed state thereof are transferred to the identical, predefined basic setting.
  • At least one test print is then printed, in which case, if the corresponding printing unit comprises a dampening unit in addition to an inking unit, at least one test print is first printed when the dampening unit is deactivated.
  • the dampening unit is deactivated, printing is carried out with a faulty ink-dampening solution balance, so that the printing form positioned on the forme cylinder assumes or leads printing ink throughout.
  • the test print or each of these test prints is preferably also carried out when the traversing or rubbing of so-called distributor rolls or traversing rollers of the inking unit is deactivated.
  • a third step of the method according to the invention at least one test print printed with deactivated dampening unit is measured, whereby a color density is measured in each color zone of the test print so as finally to metrologically record the basic setting of the ink zone setting elements of the inking zones of the inking unit.
  • a fourth step of the method according to the invention the color densities of all ink zones of an inking unit measured at a test pressure are compared with one another, whereby the basic settings of the ink zone setting elements of the corresponding inking unit are adapted in such a way that an identical color density can be ensured for each ink zone.
  • the color densities of a printed under quasi-stationary pressure conditions test pressure are compared, with quasi-stationary pressure conditions are present when there is no significant change in color densities in the ink zones from test pressure to test pressure.
  • At least one test print is also printed with activated dampening unit after printing with deactivated dampening unit, wherein at least one printed with activated dampening unit under quasi-stationary pressure conditions test print is measured in terms of its color density in the individual color zones. From this measurement can then be concluded on the setting of the dampening unit. If, despite the adjusted basic settings of the ink zone control elements, there is a deviation for the ink density in the individual ink zones, then it can be concluded that with the dampening unit no uniform dampening can be provided over the entire width of the format Setting the dampening unit z. B. can be initiated by generating a corresponding warning.
  • a printing form to be used in this case must fulfill the condition of equal color reduction or area coverage in all ink zones.
  • the test pressure or each of these test prints is in turn preferably carried out when the traversing or trituration of so-called distributor rollers or traversing rollers of the inking unit is deactivated.
  • the metrological detection of the or each test print can either be done in-line for printing within the press or offline for printing outside the press. Then, when the metrological detection takes place in-line for printing within the printing press, a fully automated detection and adjustment of the basic setting of Farbzonenstellelementen of inking done. Then, when the measurement is taken off-line outside the printing press, a semi-automated detection and adjustment of the basic setting of the ink zone adjusting elements can be realized.
  • the basic setting of the inking zone actuation elements of the inking units of all the printing units involved in the printing can be carried out, wherein this is preferably carried out successively for each printing unit and thus inking unit.

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Description

Die Erfindung betrifft ein Verfahren zum Betreiben einer Druckmaschine, nämlich zur Erfassung und Anpassung einer Grundeinstellung von Farbzonenstellelementen des Farbwerks mindestens eines Druckwerks der Druckmaschine.The invention relates to a method for operating a printing press, namely for detecting and adapting a basic setting of ink zone setting elements of the inking unit of at least one printing unit of the printing press.

Beim Drucken wird ein Bedruckstoff nacheinander durch mehrere Druckwerke einer Druckmaschine bewegt, wobei in jedem Druckwerk in der Regel eine Druckfarbe auf den Bedruckstoff aufgetragen wird. Beim autotypischen Zusammendruck werden in der Regel die vier Skalenfarben Schwarz, Magenta, Cyan und Gelb sowie gegebenenfalls Sonderfarben gedruckt, wobei für jede dieser Druckfarben ein separates Druckwerk und damit Farbwerk vorhanden ist.When printing a substrate is successively moved through several printing units of a printing press, wherein in each printing unit usually a printing ink is applied to the substrate. In the case of autotypical se-tenant printing, the four scale colors black, magenta, cyan and yellow and, if appropriate, spot colors are generally printed, with a separate printing unit and therefore inking unit being present for each of these printing inks.

Das Farbwerk eines jeden Druckwerks verfügt über eine Farbdosiereinrichtung, wobei die Farbdosiereinrichtung eine der Anzahl der Farbzonen entsprechende Anzahl von Farbzonenstellelementen umfasst. Die Farbzonenstellelemente werden auch als Farbschieber oder Farbmesser bezeichnet. Je nach Stellung der Farbzonenstellelemente wird Druckfarbe auf eine Duktorwalze und über mehrere der Duktorwalze nachgeordnete Farbwerkwalzen auf eine Druckform aufgetragen.The inking unit of each printing unit has a Farbdosiereinrichtung, wherein the Farbdosiereinrichtung comprises a number of ink zones corresponding number of Farbzonenstellelementen. The Farbzonenstellelemente are also referred to as a color slider or color meter. Depending on the position of the Farbzonenstellelemente printing ink is applied to a ductor roller and several of the ink fountain roller downstream inking rollers on a printing plate.

Um einen schnellen und makulaturarmen Produktionsbeginn an einer Druckmaschine zu gewährleisten, ist es erforderlich, dass die Farbzonenstellelemente der Farbwerke der Druckwerke einer Druckmaschine bei einer definierten Positionierung bzw. Einstellung derselben eine reproduzierbare Farbdichte in den entsprechenden Farbzonen des gedruckten Druckbilds bereitstellen. So müssen sich z. B. dann, wenn sämtliche Farbzonenstellelemente eines Farbwerks eines Druckwerks eine identische Stellung bzw. Position einnehmen, in den Farbzonen des gedruckten Druckbilds bei gleicher Flächendeckung identische Farbdichten einstellen.In order to ensure a fast and low-waste start of production on a printing machine, it is necessary that the Farbzonenstellelemente the inking units of the printing units of a printing machine provide a reproducible color density in the corresponding color zones of the printed printed image at a defined positioning or setting the same. So z. B. when all Farbzonenstellelemente an inking unit of a printing unit occupy an identical position or position, set in the ink zones of the printed image with the same area coverage identical color densities.

Ob dies jedoch tatsächlich der Fall ist, hängt von der Positionsgenauigkeit der Farbzonenstellelemente ab. Bisher besteht an Druckmaschinen keine Möglichkeit, die Positionsgenauigkeit der Farbzonenstellelemente einfach und schnell zu überprüfen. Es besteht jedoch ein erheblicher Bedarf daran, die Positionsgenauigkeit der Farbzonenstellelemente dadurch zu überprüfen, dass eine Grundeinstellung der Farbzonenstellelemente erfasst und angepasst wird, um so zu gewährleisten, dass dann, wenn sämtliche Farbzonenstellelemente eines Farbwerks eine identische Stellung bzw. Position einnehmen, sich auch in den Farbzonen des gedruckten Druckbilds bei gleicher Flächendeckung identische Farbdichten einstellen.However, whether this is actually the case depends on the positional accuracy of the ink zone actuators. Up to now, printing presses have not been able to easily and quickly check the positional accuracy of the ink zone setting elements. However, there is a considerable need to verify the positional accuracy of the inking zone actuators by detecting and adjusting a basic setting of the inking zone actuators so as to ensure that when all of the ink fountain inking element positions occupy an identical position Set the color zones of the printed image with the same area coverage identical color densities.

In diesem Zusammenhang ist aus der DE 103 12 998 A1 eine lernende Farbführung bekannt.
Darin wird ein Verfahren zur Steuerung von Druckmaschinen, insbesondere zur Korrektur von Fehleinstellungen oder Optimierung der Farbführung bei Druckbeginn eines Druckauftrags beschrieben. Zur Einstellung der Farbführung werden die Einstellwerte für den Farbeinlauf und die Farbdosierung, die die Farbzonenöffnung und die Farbstreifenbreite umfassen, bestimmt und an Steuerungsmittel der Druckmaschine übertragen. Die Farbführung wird mittels maschinenseitig gespeicherter Einstellwerte früherer Druckaufträge voreingestellt und zur Optimierung der Druckergebnisse für jeden Druckauftrag korrigiert. Für die Ermittlung der notwendigen Korrekturen soll eine optische Vermessung der Färbung eines Probebogens erfolgen.
Die korrigierten Einstellwerte werden für nachfolgende Druckaufträge gespeichert.In this context is from the DE 103 12 998 A1 a learning color guide known.
It describes a method for controlling printing presses, in particular for correcting incorrect settings or optimizing color guidance at the start of printing of a print job. To adjust the color guide, the set values for the ink feed and the ink metering, which comprise the ink zone opening and the color strip width, are determined and transmitted to control means of the printing press. The color guide is preset by means of previously stored print settings stored on the machine and corrected to optimize the print results for each print job. To determine the necessary corrections, an optical measurement of the color of a sample sheet should be made.
The corrected setting values are saved for subsequent print jobs.

Hiervon ausgehend liegt der vorliegenden Erfindung das Problem zugrunde ein neuartiges Verfahren zum Betreiben einer Druckmaschine, nämlich zur Erfassung und Anpassung einer Grundeinstellung von Farbzonenstellelementen von Farbwerken der Druckmaschine, zu schaffen.On this basis, the present invention is based on the problem of providing a novel method for operating a printing press, namely for detecting and adapting a basic setting of ink zone setting elements of inking units of the printing press.

Dieses Problem wird durch ein Verfahren gemäß Anspruch 1 gelöst. Das erfindungsgemäße Verfahren umfasst zumindest die folgenden Schritte: a) es wird ein Druckwerk mit einem druckbereiten Farbwerk bereitgestellt, wobei sämtliche Farbzonenstellelemente des druckbereiten Farbwerks auf eine identische, vordefinierte Grundeinstellung eingestellt werden; b) es wird mindestens ein Testdruck bei deaktiviertem Feuchtwerk gedruckt; c) es wird mindestens ein Testdruck vermessen, nämlich derart, dass in jeder Farbzone des Testdrucks eine Farbdichte gemessen wird, um die Grundeinstellung des Farbzonenstellelements jeder Farbzone des Farbwerks messtechnisch zu erfassen; d) es werden die an einem Testdruck messtechnisch erfassten Farbdichten aller Farbzonen des Farbwerks miteinander verglichen, wobei abhängig hiervon die Grundeinstellungen der Farbzonenstellelemente des Farbwerks so lange verändert werden, bis sich für jede Farbzone eine identische Farbdichte ergibt.This problem is solved by a method according to claim 1. The inventive method comprises at least the following steps: a) it is a Provided with a printing unit ready for printing, wherein all Farbzonenstellelemente of the ready-to-print inking unit are set to an identical, predefined basic setting; b) at least one test print is printed with the dampening unit deactivated; c) at least one test pressure is measured, namely such that a color density is measured in each color zone of the test print in order to measure the basic setting of the ink zone actuator of each ink zone of the inking unit; d) the color densities of all color zones of the inking unit measured by a test pressure are compared with one another, the basic settings of the ink zone setting elements of the inking unit being changed as a result, until an identical color density results for each color zone.

Mit dem erfindungsgemäßen Verfahren kann einfach und sicher die Positionsgenauigkeit von Farbzonenstellelementen überprüft werden. Erfindungsgemäß wird eine Grundeinstellung der Farbzonenstellelemente erfasst und angepasst, sodass dann, wenn die Farbzonenstellelemente eines Farbwerks identische Positionen bzw. Stellungen einnehmen, sich auch in den entsprechenden Farbzonen eines gedruckten Druckbilds identische Farbdichten einstellen. Das erfindungsgemäße Verfahren kann vollautomatisiert oder auch teilautomatisiert durchgeführt werden.With the method according to the invention, the position accuracy of ink zone setting elements can be checked easily and reliably. According to the invention, a basic setting of the ink zone setting elements is detected and adjusted so that when the ink zone setting elements of an inking unit occupy identical positions or positions, identical color densities also occur in the corresponding color zones of a printed print image. The inventive method can be carried out fully automated or semi-automated.

Bevorzugte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen und der nachfolgenden Beschreibung.Preferred embodiments of the invention will become apparent from the dependent claims and the description below.

Jedes Druckwerk einer Druckmaschine verfügt neben einem Übertragungszylinder, der eine Übertragungsform trägt, und einem Formzylinder, der eine Druckform trägt, über ein Farbwerk, wobei mit Hilfe des Farbwerks Druckfarbe auf die auf dem Formzylinder positionierte Druckform aufgetragen wird. Ein solches Farbwerk verfügt über eine Farbdosiereinrichtung sowie mehrere Farbwerkwalzen, um die Druckfarbe auf die Druckform aufzutragen.Each printing unit of a printing press has, in addition to a transfer cylinder, which carries a transfer form, and a forme cylinder, which carries a printing form, via an inking unit, wherein ink is applied to the printing forme positioned on the forme cylinder with the aid of the inking unit. Such an inking unit has a Farbdosiereinrichtung and several inking rollers to apply the ink to the printing form.

Die Farbdosiereinrichtung eines Farbwerks verfügt u. a. über einen Farbkasten und Farbzonenstellelemente, wobei für jede Farbzone ein Farbzonenstellelement vorhanden ist, um für jede Farbzone die mit Hilfe des Farbwerks auf die Druckform aufgetragene Farbmenge individuell einzustellen. Die Farbzonenstellelemente werden auch als Farbschieber oder Farbmesser bezeichnet.The ink metering device of an inking unit has u. a. via an ink fountain and Farbzonenstellelemente, wherein for each color zone, a Farbzonenstellelement is present to set for each color zone, the amount of ink applied to the printing form by means of the inking unit individually. The Farbzonenstellelemente are also referred to as a color slider or color meter.

Um bei einem Produktionsbeginn bzw. Produktionsstart an einer Druckmaschine schnell makulaturfrei zu drucken, muss mit den Farbzonenstellelementen eine reproduzierbare Farbmenge je Farbzone auf die auf dem Formzylinder positionierte Druckform und damit letztendlich auf den Bedruckstoff aufgetragen werden können.In order to quickly print waste-free at a production start or start of production on a printing press, a reproducible amount of ink per ink zone must be able to be applied to the printing form positioned on the form cylinder and thus ultimately to the printing material with the ink zone setting elements.

Die Erfindung schlägt nun ein Verfahren vor, mit Hilfe dessen die Positionsgenauigkeit der Farbzonenstellelemente überprüft werden kann, nämlich dadurch, dass eine sogenannte Grundeinstellung der Farbzonenstellelemente erfasst und angepasst wird, sodass letztendlich im Drucken dann, wenn sämtliche Farbzonenstellelemente eines Farbwerks eine identische Einstellung bzw. Position einnehmen, in allen Farbzonen des gedruckten Druckbilds eine identische Farbdichte bereitgestellt wird.The invention now proposes a method with the aid of which the positional accuracy of the inking zone adjusting elements can be checked, namely by detecting and adjusting a so-called basic setting of the inking zone adjusting elements, so that ultimately when all the inking element actuating elements of an inking unit have an identical setting or position assume that an identical color density is provided in all color zones of the printed printed image.

In einem ersten Schritt des erfindungsgemäßen Verfahrens wird ein Druckwerk mit einem druckbereiten Farbwerk bereitgestellt, wobei sämtliche Farbzonenstellelemente des druckbereiten Farbwerks auf eine identische, vordefinierte Grundeinstellung eingestellt werden. Bei dieser definierten Grundeinstellung kann es sich z. B. um die sogenannte Nullposition der Farbzonenstellelemente handeln. Bei dieser Einstellung der Farbzonenstellelemente auf eine identische, vordefinierte Grundeinstellung wird vorzugsweise so vorgegangen, dass die Farbzonenstellelemente des Farbwerks ausgehend von derselben Richtung in die Grundeinstellung gebracht werden, nämlich derart, dass entweder alle Farbzonenstellelemente ausgehend von einem stärker geöffneten Zustand derselben oder ausgehend von einem stärker geschlossenen Zustand derselben in die identische, vordefinierte Grundeinstellung überführt werden. Hierdurch können Hystereseeffekte der Farbzonenstellelemente eliminiert werden.In a first step of the method according to the invention, a printing unit is provided with a ready-to-print inking unit, wherein all Farbzonenstellelemente the print-ready inking unit are set to an identical, predefined basic setting. With this defined basic setting, it may be z. B. to act as the so-called zero position of the Farbzonenstellelemente. In this setting of the ink fountain keys to an identical, predefined basic setting is preferably carried out so that the Farbzonenstellelemente the inking be brought from the same direction in the default, namely such that either all Farbzonenstellelemente starting from a more open state of the same or starting from a stronger closed state thereof are transferred to the identical, predefined basic setting. As a result, hysteresis effects of the ink zone setting elements can be eliminated.

In einem zweiten Schritt des erfindungsgemäßen Verfahrens wird sodann mindestens ein Testdruck gedruckt, wobei hierbei dann, wenn das entsprechende Druckwerk neben einem Farbwerk auch ein Feuchtwerk umfasst, zuerst bei deaktiviertem Feuchtwerk mindestens ein Testdruck gedruckt wird. Bei deaktiviertem Feuchtwerk wird mit einem gestörten Druckfarbe-Feuchtmittel-Gleichgewicht gedruckt, sodass die auf dem Formzylinder positionierte Druckform durchgängig Druckfarbe annimmt bzw. führt. Der Testdruck oder jeder dieser Testdrucke wird vorzugsweise ferner bei deaktivierter Changierung bzw. Verreibung sogenannter Reiberwalzen bzw. Changierwalzen des Farbwerks durchgeführt.In a second step of the method according to the invention, at least one test print is then printed, in which case, if the corresponding printing unit comprises a dampening unit in addition to an inking unit, at least one test print is first printed when the dampening unit is deactivated. When the dampening unit is deactivated, printing is carried out with a faulty ink-dampening solution balance, so that the printing form positioned on the forme cylinder assumes or leads printing ink throughout. The test print or each of these test prints is preferably also carried out when the traversing or rubbing of so-called distributor rolls or traversing rollers of the inking unit is deactivated.

Anschließend wird in einem dritten Schritt des erfindungsgemäßen Verfahrens mindestens ein bei deaktiviertem Feuchtwerk gedruckter Testdruck vermessen, wobei hierbei in jeder Farbzone des Testdrucks eine Farbdichte gemessen wird, um so letztendlich die Grundeinstellung der Farbzonenstellelemente der Farbzonen des Farbwerks messtechnisch zu erfassen.Subsequently, in a third step of the method according to the invention, at least one test print printed with deactivated dampening unit is measured, whereby a color density is measured in each color zone of the test print so as finally to metrologically record the basic setting of the ink zone setting elements of the inking zones of the inking unit.

In einem vierten Schritt des erfindungsgemäßen Verfahrens werden die an einem Testdruck messtechnisch erfassten Farbdichten aller Farbzonen eines Farbwerks miteinander verglichen, wobei abhängig hiervon die Grundeinstellungen der Farbzonenstellelemente des entsprechenden Farbwerks derart angepasst werden, dass für jede Farbzone eine identische Farbdichte gewährleistet werden kann. Dabei werden im vierten Schritt des erfindungsgemäßen Verfahrens die Farbdichten eines unter quasistationären Druckbedingungen gedruckten Testdrucks miteinander verglichen, wobei quasistationäre Druckbedingungen dann vorliegen, wenn sich von Testdruck zu Testdruck keine deutliche Veränderung der Farbdichten in den Farbzonen einstellt.In a fourth step of the method according to the invention, the color densities of all ink zones of an inking unit measured at a test pressure are compared with one another, whereby the basic settings of the ink zone setting elements of the corresponding inking unit are adapted in such a way that an identical color density can be ensured for each ink zone. In the fourth step of the process according to the invention, the color densities of a printed under quasi-stationary pressure conditions test pressure are compared, with quasi-stationary pressure conditions are present when there is no significant change in color densities in the ink zones from test pressure to test pressure.

Es liegt dabei im Sinne der hier vorliegenden Erfindung, anhand der messtechnisch erfassten Farbdichten aller Farbzonen eines unter quasistationären Druckbedingungen gedruckten Testdrucks zu entscheiden, ob entweder die Grundeinstellungen der Farbzonenstellelemente des Farbwerks angepasst werden müssen, oder ob eine Walzenbeistellung von Farbauftragwalzen des Farbwerks angepasst werden muss. Dann, wenn aus den messtechnisch erfassten Farbdichten aller Farbzonen eines Farbwerks folgt, dass sich die messtechnisch erfassten Farbdichten über die Farbzonen quasikontinuierlich verändern, wird darauf geschlossen, dass die Walzenbeistellung von Farbauftragwalzen des Farbwerks angepasst werden muss. Folgt hingegen aus den messtechnisch erfassten Farbdichten der Farbzonen eines Farbwerks, dass sich die Farbdichten der Farbzonen farbzonenindividuell verändern, so wird darauf geschlossen, dass die Grundeinstellung der Farbzonenstellelemente des Farbwerks anzupassen ist.It is within the meaning of the present invention, based on the metrologically detected color densities of all ink zones printed under quasi-stationary printing conditions test to decide whether either the basic settings of Farbzonenstellelemente the inking must be adjusted, or whether a roll provision of inking rollers of the inking must be adjusted. Then, if it follows from the metrologically recorded color densities of all ink zones of an inking unit, that the metrologically detected color densities change quasi-continuously over the inking zones, it is concluded that the roll provision of inking rollers of the inking unit must be adjusted. On the other hand, if the color densities of the ink zones of an inking unit that are recorded by measurement measure that the color densities of the ink zones change color zone-individually, then it is concluded that the basic setting of the ink zone setting elements of the inking unit is to be adapted.

Nach einer vorteilhaften Weiterbildung der Erfindung wird im Anschluss an das Drucken bei deaktiviertem Feuchtwerk auch mindestens ein Testdruck bei aktiviertem Feuchtwerk gedruckt, wobei auch mindestens ein bei aktiviertem Feuchtwerk unter quasistationären Druckbedingungen gedruckter Testdruck hinsichtlich seiner Farbdichte in den einzelnen Farbzonen vermessen wird. Aus dieser Messung kann dann auf die Einstellung des Feuchtwerks geschlossen werden. Ergibt sich trotz entsprechend angepasster Grundeinstellungen der Farbzonenstellelemente bei aktiviertem Feuchtwerk eine Abweichung für die Farbdichte in den einzelnen Farbzonen, so kann darauf geschlossen werden, dass mit dem Feuchtwerk über die gesamte Formatbreite keine einheitliche Feuchtung bereitgestellt werden kann, sodass dann letztendlich auf Basis dieser Messung eine Einstellung des Feuchtwerks z. B. durch Generierung einer entsprechenden Warnmeldung initiiert werden kann. Eine hierbei zu verwendende Druckform muss die Bedingung gleicher Farbabnahme bzw. Flächendeckung in allen Farbzonen erfüllen. Der Testdruck oder jeder dieser Testdrucke wird wiederum vorzugsweise bei deaktivierter Changierung bzw. Verreibung sogenannter Reiberwalzen bzw. Changierwalzen des Farbwerks durchgeführt.According to an advantageous embodiment of the invention, at least one test print is also printed with activated dampening unit after printing with deactivated dampening unit, wherein at least one printed with activated dampening unit under quasi-stationary pressure conditions test print is measured in terms of its color density in the individual color zones. From this measurement can then be concluded on the setting of the dampening unit. If, despite the adjusted basic settings of the ink zone control elements, there is a deviation for the ink density in the individual ink zones, then it can be concluded that with the dampening unit no uniform dampening can be provided over the entire width of the format Setting the dampening unit z. B. can be initiated by generating a corresponding warning. A printing form to be used in this case must fulfill the condition of equal color reduction or area coverage in all ink zones. The test pressure or each of these test prints is in turn preferably carried out when the traversing or trituration of so-called distributor rollers or traversing rollers of the inking unit is deactivated.

Die messtechnische Erfassung des oder jeden Testdrucks kann entweder innerhalb der Druckmaschine inline zum Drucken oder außerhalb der Druckmaschine offline zum Drucken erfolgen. Dann, wenn die messtechnische Erfassung innerhalb der Druckmaschine inline zum Drucken erfolgt, kann eine vollautomatisierte Erfassung und Anpassung der Grundeinstellung von Farbzonenstellelementen von Farbwerken erfolgen. Dann, wenn außerhalb der Druckmaschine offline die Messung durchgeführt wird, kann eine teilautomatisierte Erfassung und Anpassung der Grundeinstellung der Farbzonenstellelemente realisiert werden.The metrological detection of the or each test print can either be done in-line for printing within the press or offline for printing outside the press. Then, when the metrological detection takes place in-line for printing within the printing press, a fully automated detection and adjustment of the basic setting of Farbzonenstellelementen of inking done. Then, when the measurement is taken off-line outside the printing press, a semi-automated detection and adjustment of the basic setting of the ink zone adjusting elements can be realized.

Mit der Erfindung kann die Grundeinstellung der Farbzonenstellelemente der Farbwerke sämtlicher am Druck beteiligter Druckwerke durchgeführt werden, wobei dies vorzugsweise für jedes Druckwerk und damit Farbwerk nacheinander durchgeführt wird.With the invention, the basic setting of the inking zone actuation elements of the inking units of all the printing units involved in the printing can be carried out, wherein this is preferably carried out successively for each printing unit and thus inking unit.

Claims (11)

  1. A method for operating a printing press, in particular a sheet-fed printing press, namely for capturing and adapting a basic setting of ink zone adjusting elements of the inking couple of at least one printing couple of the printing press, with the following steps
    a) at least one test print is printed;
    b) at least one test print is measured, namely such that in each ink zone of the test print an ink density is measured in order to capture the basic setting of the ink zone adjusting element for each ink zone of the inking couple through measurement;
    characterized by the following further steps:
    c) a printing couple with an inking couple ready for printing is provided, wherein all ink zone adjusting elements of the inking couple ready for printing are adjusted to an identical, predefined basic setting and in this way the at least one print is printed and thereafter measured, and
    d) the ink densities of both ink zones of the inking couple captured on a test print through measurement are compared with one another, wherein dependent on this the basic settings of the ink zone adjusting elements of the inking couple are changed until an identical ink density is obtained for each ink zone.
  2. The method according to Claim 1, characterized in that in step a) for eliminating hysteresis effects of the ink zone adjusting elements all ink zone adjusting elements of the inking couple starting out from the same direction, i.e. starting out from a more closed state of the ink zone adjusting elements or from a more opened state of the ink zone adjusting elements are brought into the basic setting.
  3. The method according to Claim 1 or 2, characterized in that in step b) at least one test print is printed first with deactivated dampening unit.
  4. The method according to Claim 3, characterized in that in step c) at least one test print printed with deactivated dampening unit is measured in order to capture the basic setting of the ink zone adjusting element of each ink zone of the inking couple through measurement.
  5. The method according to Claim 3 or 4, characterized in that in step d) the ink densities of a test print printed under quasi stationary printing conditions are compared with one another.
  6. The method according to any one of the Claims 3 to 5, characterized in that by means of the ink densities of all ink zones of a test printed under quasi stationary printing conditions captured through measurement it is decided if the basic settings of the ink zone adjusting elements of the inking couple are adapted or if a roller engagement of ink form rollers of the inking couple is adapted.
  7. The method according to Claim 6, characterized in that when the ink densities of the ink zones captured through measurements quasi continuously change via the ink zones it is concluded that the roller engagement of ink form rollers of the inking couple is to be adapted.
  8. The method according to any one of the Claims 6 or 7, characterized in that when the ink densities of the ink zones captured through measurement change ink zone individually it is concluded that the basic settings of the ink zone adjusting elements of the inking couple have to be adapted.
  9. The method according to any one of the Claims 3 to 8, characterized in that following this in step b) at least one test print is printed with activated dampening unit.
  10. The method according to Claim 9, characterized in that following this in step c) at least one test print printed under quasi stationary printing conditions with activated dampening unit is measured in order to capture the setting of the dampening unit.
  11. The method according to any one of the Claims 3 to 10, characterized in that in step b) with deactivated oscillation of vibrator rollers of the inking couple the or each test print is printed.
EP09782540.0A 2008-09-17 2009-09-03 Method for operating a printing machine Not-in-force EP2331330B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200810042147 DE102008042147A1 (en) 2008-09-17 2008-09-17 Method for operating a printing machine
PCT/EP2009/061376 WO2010031695A1 (en) 2008-09-17 2009-09-03 Method for operating a printing machine

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EP2331330A1 EP2331330A1 (en) 2011-06-15
EP2331330B1 true EP2331330B1 (en) 2013-11-06

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EP (1) EP2331330B1 (en)
DE (1) DE102008042147A1 (en)
WO (1) WO2010031695A1 (en)

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Publication number Priority date Publication date Assignee Title
JP7311405B2 (en) 2019-11-21 2023-07-19 リョービＭｈｉグラフィックテクノロジー株式会社 Printer
JP7316917B2 (en) 2019-12-04 2023-07-28 リョービＭｈｉグラフィックテクノロジー株式会社 Printer

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3331208A1 (en) * 1983-08-30 1985-03-14 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach METHOD FOR ADJUSTING THE INK OF A PRINTING MACHINE AND MEASURING DEVICE FOR ITS IMPLEMENTATION
JPH0796293B2 (en) * 1986-12-29 1995-10-18 東芝精機株式会社 Ink supply amount adjustment device for printing machine
DE3914831C3 (en) * 1989-05-05 1999-05-20 Roland Man Druckmasch Device for zone-wise setting of a metering gap of an ink metering system of a printing press
DE10312998B4 (en) * 2002-04-03 2015-07-09 Heidelberger Druckmaschinen Ag Learner color guide

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WO2010031695A1 (en) 2010-03-25
EP2331330A1 (en) 2011-06-15

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