EP2331330A1 - Method for operating a printing machine - Google Patents

Method for operating a printing machine

Info

Publication number
EP2331330A1
EP2331330A1 EP09782540A EP09782540A EP2331330A1 EP 2331330 A1 EP2331330 A1 EP 2331330A1 EP 09782540 A EP09782540 A EP 09782540A EP 09782540 A EP09782540 A EP 09782540A EP 2331330 A1 EP2331330 A1 EP 2331330A1
Authority
EP
European Patent Office
Prior art keywords
ink
unit
inking
inking unit
printing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP09782540A
Other languages
German (de)
French (fr)
Other versions
EP2331330B1 (en
Inventor
Rainer Gebhardt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Manroland Sheetfed GmbH
Original Assignee
Manroland AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Manroland AG filed Critical Manroland AG
Publication of EP2331330A1 publication Critical patent/EP2331330A1/en
Application granted granted Critical
Publication of EP2331330B1 publication Critical patent/EP2331330B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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 machine, namely for detecting and adjusting a basic setting of Farbzonenstellelemen- th 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.
  • 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 method according to the invention comprises at least the following steps: a) a printing unit with a ready-to-print inking unit is provided, wherein all color zone setting elements 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 ink zones of the inking unit measured by a test print are compared with one another, whereby the basic settings of the ink zone setting elements of the inking unit are adjusted in such a way that an identical color density results for each ink 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 proposes a method by means of which the positional accuracy of the ink zone setting elements can be checked, namely by detecting and adjusting a so-called basic setting of the ink zone setting elements, so that ultimately when all the ink fountain elements of an inking unit are identical in printing Assume setting or position, 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, whereby in this 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 in order to finally 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 ink 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 actuator elements of the corresponding inking unit are adjusted 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.
  • the metrological recording of the or each test print can either be done in-line for printing inside 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, if the measurement is carried out offline outside the printing press, a partially automated detection and adaptation of the basic setting of the ink zone setting elements can be realized.
  • the basic adjustment of the inking zone actuating elements of the inking units of all the printing units involved in the printing can be carried out, this being 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)

Abstract

The invention relates to a method for operating a printing machine, particularly a sheet-fed printing machine, namely for detecting and adjusting a base setting of ink zone control elements of the inking unit of a printing mechanism of the printing machine, having at least the following steps: a) a printing mechanism having a print-ready inking unit is provided, wherein all ink zone control elements of the print-ready inking unit are set to an identical, predefined base setting; b) at least one test print is printed; c) at least one test print is measured, namely in such a way that an ink density is measured in each ink zone of the test print in order to metrologically detect the base setting of the ink zone control element of each ink zone of the inking unit; d) the ink densities of all ink zones of the inking unit, which were detected metrologically on a test print, are compared to each other, wherein according thereto the base settings of the ink zone control elements of the inking unit are adjusted in such a way that an identical ink density results for each ink zone.

Description

Verfahren zum Betreiben einer Druckmaschine Method for operating a printing machine
Die Erfindung betrifft ein Verfahren zum Betreiben einer Druckmaschine, nämlich zur Erfassung und Anpassung einer Grundeinstellung von Farbzonenstellelemen- ten des Farbwerks mindestens eines Druckwerks der Druckmaschine.The invention relates to a method for operating a printing machine, namely for detecting and adjusting a basic setting of Farbzonenstellelemen- th 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. 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 über- prüfen. 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 gedruck- ten 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. However, whether this is actually the case depends on the positional accuracy of the ink zone actuators. Up to now, there has been no way for printing presses to easily and quickly check the position 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 identical color densities for the same area coverage with the color zones of the printed image.
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 Farb- werken 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 Farb- zonenstellelemente 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 derart angepasst werden, dass sich für jede Farbzone eine identische Farbdichte ergibt. 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.This problem is solved by a method according to claim 1. The method according to the invention comprises at least the following steps: a) a printing unit with a ready-to-print inking unit is provided, wherein all color zone setting elements 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 ink zones of the inking unit measured by a test print are compared with one another, whereby the basic settings of the ink zone setting elements of the inking unit are adjusted in such a way that an identical color density results for each ink zone. 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 Unteransprü- chen und der nachfolgenden Beschreibung.Preferred developments of the invention emerge from the subclaims and the following description.
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. 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 ange- passt wird, sodass letztendlich im Drucken dann, wenn sämtliche Farbzonenstell- elemente eines Farbwerks eine identische Einstellung bzw. Position einnehmen, in allen Farbzonen des gedruckten Druckbilds eine identische Farbdichte bereitgestellt wird.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 forme positioned on the forme cylinder and thus ultimately to the printing material with the ink zone setting elements. The invention now proposes a method by means of which the positional accuracy of the ink zone setting elements can be checked, namely by detecting and adjusting a so-called basic setting of the ink zone setting elements, so that ultimately when all the ink fountain elements of an inking unit are identical in printing Assume setting or position, 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 Druck- werk 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. 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 Farbzo- nen des Farbwerks messtechnisch zu erfassen.In a second step of the method according to the invention, at least one test print is then printed, whereby in this 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. 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 in order to finally 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 Farb- zonenstellelemente 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 ink 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 actuator elements of the corresponding inking unit are adjusted 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 Druck- bedingungen 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 Farb- dichten 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 farbzonen- individuell verändern, so wird darauf geschlossen, dass die Grundeinstellung der Farbzonenstellelemente des Farbwerks anzupassen ist. 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.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 be adjusted got to. Then, if it follows from the metrologically recorded color densities of all color zones of an inking unit that the metrologically recorded color densities change quasi-continuously over the ink zones, it is concluded that the roll provision of inking rollers of the inking unit must be adjusted. If, on the other hand, the color densities of the inking zones of an inking unit detected by measurement indicate that the color densities of the inking zones change individually, it is concluded that the basic setting of the inking zone setting elements of the inking unit is to be adapted. 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 inner- halb 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 Mes- sung durchgeführt wird, kann eine teilautomatisierte Erfassung und Anpassung der Grundeinstellung der Farbzonenstellelemente realisiert werden.The metrological recording of the or each test print can either be done in-line for printing inside 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, if the measurement is carried out offline outside the printing press, a partially automated detection and adaptation of the basic setting of the ink zone setting elements can be realized.
Mit der Erfindung kann die Grundeinstellung der Farbzonenstellelemente der Farbwerke sämtlicher am Druck beteiligter Druckwerke durchgeführt werden, wo- bei dies vorzugsweise für jedes Druckwerk und damit Farbwerk nacheinander durchgeführt wird. With the invention, the basic adjustment of the inking zone actuating elements of the inking units of all the printing units involved in the printing can be carried out, this being preferably carried out successively for each printing unit and thus inking unit.

Claims

Ansprüche claims
1. Verfahren zum Betreiben einer Druckmaschine, insbesondere einer Bogendruckmaschine, nämlich zur Erfassung und Anpassung einer Grundeinstellung von Farbzonenstellelementen des Farbwerks mindestens eines Druckwerks der Druckmaschine, mit zumindest folgenden Schritten: a) ein Druckwerk mit einem druckbereiten Farbwerk wird bereitgestellt, wobei sämtliche Farbzonenstellelemente des druckbereiten Farbwerks auf eine identische, vordefinierte Grundeinstellung eingestellt werden; b) mindestens ein Testdruck wird gedruckt; c) mindestens ein Testdruck wird 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) die an einem Testdruck messtechnisch erfassten Farbdichten aller1. A method for operating a printing machine, in particular a sheet-fed printing machine, namely for detecting and adjusting a basic setting of Farbzonenstellelementen the inking unit of at least one printing unit of the printing machine, comprising at least the following steps: a) a printing unit with a ready-to-print inking unit is provided, all Farbzonenstellelemente of druckbereiten Be set to an identical, predefined basic setting; b) at least one test print is printed; 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 of a test print measured
Farbzonen des Farbwerks werden miteinander verglichen, wobei abhängig hiervon die Grundeinstellungen der Farbzonenstellelemente des Farbwerks derart angepasst werden, dass sich für jede Farbzone eine identische Farbdichte ergibt.Ink zones of the inking unit are compared with each other, depending on which the basic settings of the Farbzonenstellelemente the inking unit are adjusted so that there is an identical color density for each color zone.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass in Schritt a) zur Eliminierung von Hysterseeffekten der Farbzonenstellelemente sämtliche Farbzonenstellelemente des Farbwerks ausgehend von derselben Richtung, also ausgehend von einem stärker geschlossenen Zustand der Farbzonen- Stellelemente oder von einem stärker geöffneten Zustand der Farbzonenstellelemente, in die Grundeinstellung gebracht werden.2. The method according to claim 1, characterized in that in step a) for eliminating Hysterseeffekten the Farbzonenstellelemente all Farbzonenstellelemente of the inking unit from the same direction, ie starting from a more closed state of the inking zone actuators or a more open state of the Farbzonenstellelemente, be brought into the basic setting.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass in Schritt b) zuerst bei deaktiviertem Feuchtwerk mindestens ein Testdruck gedruckt wird. 3. The method according to claim 1 or 2, characterized in that in step b) first at least one test print is printed with deactivated dampening unit.
4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass in Schritt c) mindestens ein bei deaktiviertem Feuchtwerk gedruckter Testdruck vermessen wird, um die Grundeinstellung des Farbzonenstellelements jeder Farbzo- ne des Farbwerks messtechnisch zu erfassen.4. 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 metrologically detect the basic setting of the ink zone setting element of each color zone of the inking unit.
5. Verfahren nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass in Schritt d) die Farbdichten eines unter quasistationären Druckbedingungen gedruckten Testdrucks miteinander verglichen werden.5. The method according to claim 3 or 4, characterized in that in step d) the color densities of a printed under quasi-stationary printing conditions test pressure are compared.
6. Verfahren nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, dass anhand der messtechnisch erfassten Farbdichten aller Farbzonen eines unter quasistationären Druckbedingungen gedruckten Testdrucks entscheiden wird, ob die Grundeinstellungen der Farbzonenstellelemente des Farbwerks angepasst werden oder ob eine Walzenbeistellung von Farbauftragwalzen des6. The method according to any one of claims 3 to 5, characterized in that based on the metrologically detected color densities of all ink zones printed under quasi-stationary printing conditions test print will decide whether the basic settings of the ink fountain key of the inking unit are adjusted or whether a roll provision of inking rollers of
Farbwerks angepasst wird.Ink unit is adjusted.
7. Verfahren nach einem der Ansprüche 6, dadurch gekennzeichnet, dass dann, wenn sich die messtechnisch erfassten Farbdichten der Farbzonen über die Farbzonen quasikontinuierlich verändern, darauf geschlossen wird, dass die Walzenbeistellung von Farbauftragwalzen des Farbwerks anzupassen ist.7. The method according to any one of claims 6, characterized in that when the metrologically detected color densities of the ink zones on the ink zones change quasi-continuously, it is concluded that the roll provision of inking rollers of the inking unit is adjusted.
8. Verfahren nach einem der Ansprüche 6 oder 7, dadurch gekennzeichnet, dass dann, wenn sich die messtechnisch erfassten Farbdichten der Farbzo- nen farbzonenidinviduell verändern, darauf geschlossen wird, dass die Grundeinstellungen der Farbzonenstellelemente des Farbwerks anzupassen sind. 8. The method according to any one of claims 6 or 7, characterized in that when the metrologically detected color densities of Farbzo- nen colorzonenidinviduell change, it is concluded that the basic settings of the Farbzonenstellelemente the inking unit are adjusted.
9. Verfahren nach einem der Ansprüche 3 bis 8, dadurch gekennzeichnet, dass anschließend in Schritt b) bei aktiviertem Feuchtwerk mindestens ein Testdruck gedruckt wird.9. The method according to any one of claims 3 to 8, characterized in that subsequently in step b) with activated dampening unit at least one test print is printed.
10. Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass anschließend in Schritt c) mindestens ein bei aktiviertem Feuchtwerk unter quasistationären Druckbedingungen gedruckter Testdruck vermessen wird, um die Einstellung des Feuchtwerks zu erfassen.10. The method according to claim 9, characterized in that subsequently in step c) at least one printed with activated dampening unit under quasi-stationary pressure conditions test pressure is measured to detect the setting of the dampening unit.
11. Verfahren nach einem der Ansprüche 3 bis 10, dadurch gekennzeichnet, dass in Schritt b) bei deaktivierter Changierung von Reiberwalzen des Farbwerks der oder jeder Testdruck gedruckt wird. 11. The method according to any one of claims 3 to 10, characterized in that in step b) is printed with the traversing of distributor rollers of the inking unit or each test print is deactivated.
EP09782540.0A 2008-09-17 2009-09-03 Method for operating a printing machine Not-in-force EP2331330B1 (en)

Applications Claiming Priority (2)

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

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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

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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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