EP1757448B2 - Method for operating a printing press - Google Patents

Method for operating a printing press Download PDF

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Publication number
EP1757448B2
EP1757448B2 EP06017004.0A EP06017004A EP1757448B2 EP 1757448 B2 EP1757448 B2 EP 1757448B2 EP 06017004 A EP06017004 A EP 06017004A EP 1757448 B2 EP1757448 B2 EP 1757448B2
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EP
European Patent Office
Prior art keywords
printing
cylinder
couple
dampening
inking
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.)
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Application number
EP06017004.0A
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German (de)
French (fr)
Other versions
EP1757448B1 (en
EP1757448A2 (en
EP1757448A3 (en
Inventor
Lothar Dr. Kühlmeyer
Bernd Lindner
Holger Dr. Wiese
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Manroland Sheetfed GmbH
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Manroland Sheetfed GmbH
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Application filed by Manroland Sheetfed GmbH filed Critical Manroland Sheetfed GmbH
Publication of EP1757448A2 publication Critical patent/EP1757448A2/en
Publication of EP1757448A3 publication Critical patent/EP1757448A3/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/004—Electric or hydraulic features of drives
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2217/00—Printing machines of special types or for particular purposes
    • B41P2217/10—Printing machines of special types or for particular purposes characterised by their constructional features
    • B41P2217/13—Machines with double or multiple printing units for "flying" printing plates exchange

Definitions

  • the invention relates to a method for operating a printing press according to the preamble of claim 1.
  • a sheet-fed printing machine with several printing units comprising an impression cylinder, a blanket cylinder rolling on the impression cylinder, a forme cylinder rolling on the blanket cylinder as well as an inking unit and possibly a dampening unit, with inking rollers of the inking unit on the forme cylinder and a dampening form roller of the dampening unit also roll on the forme cylinder.
  • the impression cylinders, blanket cylinders, inking units and, if appropriate, dampening units of the printing units are driven by a main drive of the sheet-fed printing press.
  • the forme cylinders of the printing units are assigned their own drives or direct drives, which drive the forme cylinders decoupled from the main drive of the printing press with their own motors.
  • the EP 0 812 683 A1 it is also proposed to carry out a so-called flying printing plate change in printing units with forme cylinders driven by their own motor.
  • the DE 102 57 282 A1 relates to a special embodiment for carrying out a printing plate change on the fly on printing units of a sheet-fed printing machine, the forme cylinders of which are driven decoupled from the main drive of the sheet-fed printing machine via their own drive or direct drive. So in the DE 102 57 282 A1 proposed to uncouple the inking unit and dampening unit of the corresponding printing unit from the plate cylinder in order to carry out the on-the-fly printing plate change, ie to shut them down accordingly.
  • a blanket cylinder and an associated plate cylinder are driven by a common first drive motor and the blanket cylinder is engaged with an associated impression cylinder driven by a second drive motor, and a web runs through the printing gap between the blanket cylinder and the impression cylinder carried out the following process steps: interrupting the drive connection between the first drive motor and the blanket cylinder; and removing the plate cylinder from the blanket cylinder.
  • the present invention is based on the problem of creating a novel method for operating a printing press.
  • the present invention relates to a method for operating a printing press, namely for performing a printing plate change on the fly on at least one printing unit of a sheet-fed printing press, while other printing units of the sheet-fed printing press are operated in continuous printing.
  • Sheet-fed printing machines have several printing units, with a partial print image being applied to the printed sheet in each of the printing units.
  • Each of the printing units has an impression cylinder, a blanket cylinder rolling on the impression cylinder and a forme cylinder rolling on the blanket cylinder, with a blanket on the blanket cylinder and a printing plate on the forme cylinder.
  • each printing unit has an inking unit and, in the preferred exemplary embodiment, also a dampening unit. With the help of the inking unit, printing ink is applied to the printing forme positioned on the forme cylinder. With the help of the dampening system, the dampening solution is applied to the printing form positioned on the forme cylinder.
  • the printing ink is transferred to the blanket cylinder and, starting from the blanket cylinder, is transferred to printing sheets which are conveyed through a gap formed between the blanket cylinder and the impression cylinder.
  • the printed sheets to be printed are transferred from printing unit to printing unit with the help of so-called transfer cylinders.
  • the transfer cylinders and, in the area of the printing units, the impression cylinders, rubber cylinders, Inking units and dampening units are driven by a main drive of the sheet-fed printing press.
  • the forme cylinders or plate cylinders of the printing units are assigned their own drives or direct drives, with the aid of which the forme cylinders are driven decoupled from the main drive, but synchronized with the main drive, during production.
  • a printing plate change is to be carried out on a printing unit of the printing machine while other printing units are being operated in production
  • the inking rollers of the inking unit are from The forme cylinder of the respective printing unit is turned off, whereas the dampening form roller of the dampening unit first remains engaged on the forme cylinder.
  • Form cylinder and blanket cylinder remain in one printing position.
  • the dampening forme roller is also switched off from the forme cylinder, but the forme cylinder and blanket cylinder remain in printing mode.
  • the forme cylinder and the blanket cylinder are transferred to a printing position.
  • forme cylinders and blanket cylinders are temporarily in a printing position in order to use these printing units for printing ink and dampening solution during waste printing or cleaning of one To save printing plate change to be subjected to printing unit.
  • the printing plate change on the fly is carried out on this printing unit in a further step of the method according to the invention.
  • the forme cylinders and the blanket cylinders of the printing units that continue to be operated in production, which have meanwhile been transferred to a printing position are brought back into the printing position.
  • the printing unit to be subjected to a printing plate change is then carried out on the fly, with the inking unit and the dampening unit of the printing unit either continuing to be driven by the main drive or by the own drive of the corresponding forme cylinder.
  • the inking unit and dampening unit of the printing unit to be subjected to a printing plate change are driven by the main drive during the printing plate change
  • the inking unit is preferably separated from an ink container so that no additional printing ink is introduced into the inking unit and therefore no printing ink accumulates in the inking unit.
  • either all ink zone setting elements are closed, or a lift roller or film roller of the inking unit is deactivated. In this case, the inking unit and the dampening unit of the respective printing unit remain coupled to the main drive of the sheet-fed printing press.
  • the inking unit and dampening unit of the printing unit to be subjected to a printing plate change are driven by its own drive or direct drive of the plate cylinder of the corresponding printing unit while the printing plate change is being carried out
  • the inking unit and dampening unit are decoupled from the main drive and connected to the forme cylinder or its own drive the same coupled.
  • the inking unit and dampening unit are then driven at a significantly lower speed than the speed specified by the main drive, so that optimum production conditions can be maintained even with an inking unit that is not separated from the ink container.
  • the inking form rollers of the inking unit and the dampening form roller of the dampening unit are set against the forme cylinder provided with the new printing plate in order to achieve pre-inking of the printing plate.
  • the blanket cylinder and forme cylinder remain in one printing position.
  • the forme cylinder and blanket cylinder of the printing unit are then transferred to the printing position in order to be switched back to the production run. According to a first variant, this can be carried out immediately.
  • an on-the-fly printing plate change is to be carried out immediately after another printing unit, this is subsequently carried out as a printing plate change
  • the undergoing printing unit is first prepared for the printing plate change by cleaning the blanket cylinder and forme cylinder.
  • the method according to the invention described above can of course also be used when a printing plate change is to be carried out on several printing units of a printing press during the continuous printing of other printing units.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)

Description

Die Erfindung betrifft ein Verfahren zum Betreiben einer Druckmaschine nach dem Oberbegriff des Anspruchs 1.The invention relates to a method for operating a printing press according to the preamble of claim 1.

Aus dem Stand der Technik, nämlich aus der EP 0 812 683 A1 , ist eine Bogendruckmaschine mit mehreren Druckwerken bekannt, wobei jedes der Druckwerke einen Gegendruckzylinder, einen auf dem Gegendruckzylinder abrollenden Gummizylinder, einen auf dem Gummizylinder abrollenden Formzylinder sowie ein Farbwerk und gegebenenfalls ein Feuchtwerk umfasst, wobei Farbauftragwalzen des Farbwerks auf dem Formzylinder und eine Feuchtauftragwalze des Feuchtwerks ebenfalls auf dem Formzylinder abrollen. Im Druckbetrieb werden bei der dort offenbarten Bogendruckmaschine die Gegendruckzylinder, Gummizylinder, Farbwerke sowie gegebenenfalls Feuchtwerke der Druckwerke von einem Hauptantrieb der Bogendruckmaschine aus angetrieben. Den Formzylindern der Druckwerke sind hingegen Eigenantriebe bzw. Direktantriebe zugeordnet, welche die Formzylinder entkoppelt vom Hauptantrieb der Druckmaschine eigenmotorisch antreiben. In der EP 0 812 683 A1 wird weiterhin vorgeschlagen, bei Druckwerken mit eigenmotorisch angetriebenen Formzylindern einen sogenannten fliegenden Druckplattenwechsel durchzuführen.From the prior art, namely from the EP 0 812 683 A1 , a sheet-fed printing machine with several printing units is known, each of the printing units comprising an impression cylinder, a blanket cylinder rolling on the impression cylinder, a forme cylinder rolling on the blanket cylinder as well as an inking unit and possibly a dampening unit, with inking rollers of the inking unit on the forme cylinder and a dampening form roller of the dampening unit also roll on the forme cylinder. In the printing operation of the sheet-fed printing press disclosed there, the impression cylinders, blanket cylinders, inking units and, if appropriate, dampening units of the printing units are driven by a main drive of the sheet-fed printing press. In contrast, the forme cylinders of the printing units are assigned their own drives or direct drives, which drive the forme cylinders decoupled from the main drive of the printing press with their own motors. In the EP 0 812 683 A1 it is also proposed to carry out a so-called flying printing plate change in printing units with forme cylinders driven by their own motor.

Die DE 102 57 282 A1 betrifft eine spezielle Ausführungsform zur Durchführung eines fliegenden Druckplattenwechsels an Druckwerken einer Bogendruckmaschine, deren Formzylinder über einen Eigenantrieb bzw. Direktantrieb entkoppelt vom Hauptantrieb der Bogendruckmaschine angetrieben werden. So wird in der DE 102 57 282 A1 vorgeschlagen, zur Durchführung des fliegenden Druckplattenwechsels das Farbwerk sowie Feuchtwerk des entsprechenden Druckwerks vom Plattenzylinder abzukuppeln, also demnach still zu setzen.The DE 102 57 282 A1 relates to a special embodiment for carrying out a printing plate change on the fly on printing units of a sheet-fed printing machine, the forme cylinders of which are driven decoupled from the main drive of the sheet-fed printing machine via their own drive or direct drive. So in the DE 102 57 282 A1 proposed to uncouple the inking unit and dampening unit of the corresponding printing unit from the plate cylinder in order to carry out the on-the-fly printing plate change, ie to shut them down accordingly.

Beim Stillsetzen des Farbwerks während des fliegenden Druckplattenwechsels besteht das Problem, dass die Druckfarbe auf den Walzen des Farbwerks antrocknen kann. Dies ist von Nachteil, da sich hierdurch die Druckbedingungen verändern und nach Durchführung des Druckplattenwechsels in der Regel zuerst Makulatur gedruckt wird. Weiterhin können bei dem in der DE 102 57 282 A1 beschriebenen Verfahren weder die zu wechselnde Druckplatte noch das Gummituch des entsprechenden Gummizylinders gereinigt werden, wodurch sich die Durchführung des fliegenden Druckplattenwechsels erschwert und wodurch eine vergrößerte Menge an Makulatur gedruckt wird.When the inking unit is shut down while the printing plate is being changed on the fly, there is the problem that the printing ink can dry onto the rollers of the inking unit. This is disadvantageous because it changes the printing conditions and after the printing plate change has been carried out, waste is usually printed first. Furthermore, in the DE 102 57 282 A1 described method, neither the printing plate to be changed nor the rubber blanket of the corresponding rubber cylinder are cleaned, which makes it more difficult to carry out the printing plate change on the fly and as a result of which an increased amount of waste is printed.

Aus DE 199 42 619 A1 ist ein Verfahren und ein Druckwerk zur Durchführung des fliegenden Plattenwechsels bekannt.Out DE 199 42 619 A1 a method and a printing unit for performing the flying plate change is known.

In einem Druckwerk einer Rollenrotationsdruckmaschine, in dem ein Gummituchzylinder und ein zugeordneter Plattenzylinder von einem gemeinsamen ersten Antriebsmotor angetrieben werden und der Gummituchzylinder an einen zugeordneten, von einem zweiten Antriebsmotor angetriebenen Gegendruckzylinder angestellt ist, und eine Bahn den Druckspalt zwischen dem Gummituchzylinder dem Gegendruckzylinder durchläuft, werden die folgenden Verfahrensschritte durchgeführt: Unterbrechen der Antriebsverbindung zwischen dem ersten Antriebsmotor und dem Gummituchzylinder; und Abstellen des Plattenzylinders von dem Gummituchzylinder.In a printing unit of a web-fed rotary printing press, in which a blanket cylinder and an associated plate cylinder are driven by a common first drive motor and the blanket cylinder is engaged with an associated impression cylinder driven by a second drive motor, and a web runs through the printing gap between the blanket cylinder and the impression cylinder carried out the following process steps: interrupting the drive connection between the first drive motor and the blanket cylinder; and removing the plate cylinder from the blanket cylinder.

Hiervon ausgehend liegt der vorliegenden Erfindung das Problem zugrunde ein neuartiges Verfahren zum Betreiben einer Druckmaschine zu schaffen.Proceeding from this, the present invention is based on the problem of creating a novel method for operating a printing press.

Dieses Problem wird nach der Erfindung durch ein Verfahren zum Betreiben einer Druckmaschine gemäß Anspruch 1 gelöst. Hiernach wird an dem oder jedem Druckwerk, an welchem ein Druckplattenwechsel durchgeführt wird, das Farbwerk sowie gegebenenfalls das Feuchtwerk von einem dem Formzylinder des jeweiligen Druckwerks zugeordneten Eigenantrieb bzw. Direktantrieb angetrieben.This problem is solved according to the invention by a method for operating a printing press according to claim 1. Thereafter, on the or each printing unit on which a printing plate change is carried out, the inking unit and, if applicable, the dampening unit are driven by an independent drive or direct drive assigned to the forme cylinder of the respective printing unit.

Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen und der nachfolgenden Beschreibung. Ausführungsbeispiele der Erfindung werden, ohne hierauf beschränkt zu sein, nachfolgend näher erläutert.Further developments of the invention emerge from the subclaims and the following description. Embodiments of the invention are explained in more detail below, without being restricted thereto.

Die hier vorliegende Erfindung betrifft ein Verfahren zum Betreiben einer Druckmaschine, nämlich zur Durchführung eines fliegenden Druckplattenwechsels an mindestens einem Druckwerk einer Bogendruckmaschine, während andere Druckwerke der Bogendruckmaschine im Fortdruck betrieben werden.The present invention relates to a method for operating a printing press, namely for performing a printing plate change on the fly on at least one printing unit of a sheet-fed printing press, while other printing units of the sheet-fed printing press are operated in continuous printing.

Bogendruckmaschinen verfügen über mehrere Druckwerke, wobei in jedem der Druckwerke ein Teildruckbild auf Druckbogen aufgetragen wird. Jedes der Druckwerke verfügt über einen Gegendruckzylinder, einen auf dem Gegendruckzylinder abrollenden Gummizylinder und einen auf dem Gummizylinder abrollenden Formzylinder, wobei auf dem Gummizylinder ein Gummituch und auf dem Formzylinder eine Druckform positioniert ist. Weiterhin verfügt jedes Druckwerk über ein Farbwerk sowie im bevorzugten Ausführungsbeispiel auch über ein Feuchtwerk. Mithilfe des Farbwerks wird Druckfarbe auf die auf dem Formzylinder positionierte Druckform aufgetragen. Mithilfe des Feuchtwerks wird Feuchtmittel auf die auf dem Formzylinder positionierte Druckform aufgetragen.Sheet-fed printing machines have several printing units, with a partial print image being applied to the printed sheet in each of the printing units. Each of the printing units has an impression cylinder, a blanket cylinder rolling on the impression cylinder and a forme cylinder rolling on the blanket cylinder, with a blanket on the blanket cylinder and a printing plate on the forme cylinder. Furthermore, each printing unit has an inking unit and, in the preferred exemplary embodiment, also a dampening unit. With the help of the inking unit, printing ink is applied to the printing forme positioned on the forme cylinder. With the help of the dampening system, the dampening solution is applied to the printing form positioned on the forme cylinder.

Ausgehend vom Formzylinder wird die Druckfarbe auf den Gummizylinder und ausgehend vom Gummizylinder auf Druckbogen übertragen, die durch einen zwischen dem Gummizylinder und Gegendruckzylinder gebildeten Spalt hindurch gefördert werden. Die zu bedruckenden Druckbogen werden mithilfe sogenannter Transferzylinder von Druckwerk zu Druckwerk übergeben.Starting from the forme cylinder, the printing ink is transferred to the blanket cylinder and, starting from the blanket cylinder, is transferred to printing sheets which are conveyed through a gap formed between the blanket cylinder and the impression cylinder. The printed sheets to be printed are transferred from printing unit to printing unit with the help of so-called transfer cylinders.

Bei derartigen Druckmaschinen werden im sogenannten Fortdruck die Transferzylinder sowie im Bereich der Druckwerke die Gegendruckzylinder, Gummizylinder, Farbwerke sowie Feuchtwerke von einem Hauptantrieb der Bogendruckmaschine angetrieben. Nachfolgend soll davon ausgegangen werden, dass den Formzylindern bzw. Plattenzylindern der Druckwerke Eigenantriebe bzw. Direktantriebe zugeordnet sind, mithilfe derer die Formzylinder im Fortdruck entkoppelt vom Hauptantrieb, jedoch synchronisiert zum Hauptantrieb, angetrieben werden.In such printing machines, the transfer cylinders and, in the area of the printing units, the impression cylinders, rubber cylinders, Inking units and dampening units are driven by a main drive of the sheet-fed printing press. In the following, it should be assumed that the forme cylinders or plate cylinders of the printing units are assigned their own drives or direct drives, with the aid of which the forme cylinders are driven decoupled from the main drive, but synchronized with the main drive, during production.

Soll nun an einem Druckwerk der Druckmaschine ein fliegender Druckplattenwechsel durchgeführt werden, während andere Druckwerke im Fortdruck betrieben werden, so werden in einem ersten Schritt an dem noch im Fortdruck betriebenen Druckwerk, an welchem nachfolgend der fliegende Druckplattenwechsel durchgeführt werden soll, die Farbauftragwalzen des Farbwerks vom Formzylinder des jeweiligen Druckwerks abgestellt, wohingegen die Feuchtauftragwalze des Feuchtwerks zuerst am Formzylinder angestellt bleibt. Formzylinder sowie Gummizylinder bleiben in einer Druckanstellung. Nach einer vorgegebenen ersten Zeitdauer bzw. einer vorgegebenen ersten Anzahl an Maschinenumdrehungen bzw. Zylinderumdrehungen nach dem Abstellen der Farbauftragwalzen vom Formzylinder wird auch die Feuchtauftragwalze vom Formzylinder abgestellt, Formzylinder und Gummizylinder bleiben jedoch weiterhin in Druckanstellung. Im Anschluss hieran werden in einem weiteren Schritt des erfindungsgemäßen Verfahrens nach einer vorgegebenen zweiten Zeitdauer bzw. einer vorgegebenen zweiten Anzahl an Maschinenumdrehungen bzw. Zylinderumdrehungen nach dem Abstellen der Feuchtauftragwalze vom Formzylinder der Formzylinder und der Gummizylinder in eine Druckabposition überführt.If a printing plate change is to be carried out on a printing unit of the printing machine while other printing units are being operated in production, in a first step the inking rollers of the inking unit are from The forme cylinder of the respective printing unit is turned off, whereas the dampening form roller of the dampening unit first remains engaged on the forme cylinder. Form cylinder and blanket cylinder remain in one printing position. After a predetermined first period of time or a predetermined first number of machine revolutions or cylinder revolutions after the inking rollers have been switched off from the forme cylinder, the dampening forme roller is also switched off from the forme cylinder, but the forme cylinder and blanket cylinder remain in printing mode. Following this, in a further step of the method according to the invention, after a predetermined second period of time or a predetermined second number of machine revolutions or cylinder revolutions after the dampening form roller has been switched off from the forme cylinder, the forme cylinder and the blanket cylinder are transferred to a printing position.

Während der vorgegebenen ersten Zeitdauer sowie der vorgegebenen zweiten Zeitdauer bzw. während der vorgegebenen ersten Anzahl an Zylinderumdrehungen und der vorgegebenen zweiten Anzahl an Zylinderumdrehungen, für welche Formzylinder und Gummizylinder des Druckwerks, an welchem ein fliegender Druckplattenwechsel durchgeführt werden soll, in der Druckanposition bleiben, können ein auf dem Gummizylinder gespanntes Gummituch sowie eine auf dem Formzylinder gespannte Druckplatte gereinigt werden, indem auf der Druckplatte sowie auf dem Gummizylinder befindliche Druckfarbe im Sinne eines Makulaturdrucks auf Druckbogen übertragen wird. Hierbei werden dann vorzugsweise im Bereich der Druckwerke, an welchen kein Druckplattenwechsel durchgeführt werden soll und die demnach weiterhin im Fortdruck betrieben werden sollen, Formzylinder und Gummizylinder vorübergehend in eine Druckabposition, um an diesen Druckwerken Druckfarbe und Feuchtmittel während des Makulaturdrucks bzw. des Reinigens des einem Druckplattenwechsels zu unterziehenden Druckwerks zu sparen.During the specified first period and the specified second period or during the specified first number of cylinder revolutions and the specified second number of cylinder revolutions, for which forme cylinders and blanket cylinders of the printing unit on which a printing plate change is to be carried out remain in the printing position a rubber blanket stretched on the blanket cylinder and a printing plate stretched on the forme cylinder can be cleaned by transferring printing ink located on the printing plate and on the blanket cylinder to print sheets in the sense of waste printing. In this case, preferably in the area of the printing units on which no printing plate change is to be carried out and which should therefore continue to be operated in production, forme cylinders and blanket cylinders are temporarily in a printing position in order to use these printing units for printing ink and dampening solution during waste printing or cleaning of one To save printing plate change to be subjected to printing unit.

Nach dem Überführen des Formzylinders sowie Gummizylinders des einem Druckplattenwechsels zu unterziehenden Druckwerks in die Druckabposition wird in einem weiteren Schritt des erfindungsgemäßen Verfahrens an diesem Druckwerk der fliegende Druckplattenwechsel durchgeführt. In etwa zeitgleich mit dem Überführen des Formzylinders und des Gummizylinders des einem Druckplattenwechsels zu unterziehenden Druckwerks in die Druckabposition werden die Formzylinder sowie Gummizylinder der weiterhin im Fortdruck zu betreibenden Druckwerke, die zwischenzeitlich in eine Druckabposition überführt wurden, wieder in die Druckanposition gebracht. Während des Fortdrucks wird dann an dem einem Druckplattenwechsel zu unterziehendem Druckwerk der fliegende Druckplattenwechsel ausgeführt, wobei hierbei das Farbwerk und das Feuchtwerk des Druckwerks entweder weiterhin vom Hauptantrieb angetrieben werden oder vom Eigenantrieb des entsprechenden Formzylinders.After the forme cylinder and the rubber cylinder of the printing unit to be subjected to a printing plate change have been transferred into the printing deposition, the printing plate change on the fly is carried out on this printing unit in a further step of the method according to the invention. At approximately the same time as the transfer of the forme cylinder and the blanket cylinder of the printing unit to be subjected to a printing plate change into the printing position, the forme cylinders and the blanket cylinders of the printing units that continue to be operated in production, which have meanwhile been transferred to a printing position, are brought back into the printing position. During the production run, the printing unit to be subjected to a printing plate change is then carried out on the fly, with the inking unit and the dampening unit of the printing unit either continuing to be driven by the main drive or by the own drive of the corresponding forme cylinder.

Dann, wenn während des Druckplattenwechsels das Farbwerk sowie Feuchtwerk des einem Druckplattenwechsel zu unterziehenden Druckwerks vom Hauptantrieb angetrieben werden, wird das Farbwerk vorzugsweise von einem Druckfarbebehälter getrennt, so dass keine zusätzliche Druckfarbe in das Farbwerk eingebracht wird und sich demnach keine Druckfarbe im Farbwerk staut. Hierzu werden entweder alle Farbzonenstellelemente geschlossen, oder es wird eine Heberwalze bzw. Filmwalze des Farbwerks deaktiviert. In diesem Fall bleiben das Farbwerk sowie das Feuchtwerk des jeweiligen Druckwerks an den Hauptantrieb der Bogendruckmaschine gekoppelt.Then, when the inking unit and dampening unit of the printing unit to be subjected to a printing plate change are driven by the main drive during the printing plate change, the inking unit is preferably separated from an ink container so that no additional printing ink is introduced into the inking unit and therefore no printing ink accumulates in the inking unit. For this purpose, either all ink zone setting elements are closed, or a lift roller or film roller of the inking unit is deactivated. In this case, the inking unit and the dampening unit of the respective printing unit remain coupled to the main drive of the sheet-fed printing press.

In dem Fall, in welchem während der Ausführung des fliegenden Druckplattenwechsels das Farbwerk sowie Feuchtwerk des einem Druckplattenwechsels zu unterziehenden Druckwerks vom Eigenantrieb bzw. Direktantrieb des Plattenzylinders des entsprechenden Druckwerks angetrieben werden, werden Farbwerk sowie Feuchtwerk vom Hauptantrieb entkoppelt und an den Formzylinder bzw. den Eigenantrieb desselben gekoppelt. In diesem erfindungsgemäßen Fall werden dann das Farbwerk sowie Feuchtwerk mit einer deutlich niedrigeren Drehzahl angetrieben als die vom Hauptantrieb vorgegebene Drehzahl, so dass auch bei einem vom Druckfarbebehälter ungetrennten Farbwerk in denselben optimale Fortdruckbedingungen aufrecht erhalten werden können.In the case in which the inking unit and dampening unit of the printing unit to be subjected to a printing plate change are driven by its own drive or direct drive of the plate cylinder of the corresponding printing unit while the printing plate change is being carried out, the inking unit and dampening unit are decoupled from the main drive and connected to the forme cylinder or its own drive the same coupled. In this case according to the invention, the inking unit and dampening unit are then driven at a significantly lower speed than the speed specified by the main drive, so that optimum production conditions can be maintained even with an inking unit that is not separated from the ink container.

Nach ausgeführtem Druckplattenwechsel werden die Farbauftragwalzen des Farbwerks sowie die Feuchtauftragwalze des Feuchtwerks an den mit der neuen Druckplatte versehenen Formzylinder angestellt, um so eine Voreinfärbung der Druckplatte zu erzielen. Bei der Voreinfärbung bleiben Gummizylinder und Formzylinder weiterhin in einer Druckabposition.After the printing plate has been changed, the inking form rollers of the inking unit and the dampening form roller of the dampening unit are set against the forme cylinder provided with the new printing plate in order to achieve pre-inking of the printing plate. During the pre-inking, the blanket cylinder and forme cylinder remain in one printing position.

Nach Ausführung dieser Voreinfärbung werden dann der Formzylinder und Gummizylinder des Druckwerks in die Druckanposition überführt, um wieder in den Fortdruck eingeschaltet zu werden. Dies kann nach einer ersten Variante unmittelbar durchgeführt werden.After this pre-inking has been carried out, the forme cylinder and blanket cylinder of the printing unit are then transferred to the printing position in order to be switched back to the production run. According to a first variant, this can be carried out immediately.

Nach einer zweiten Variante wird dann, wenn unmittelbar im Anschluss an einem anderen Druckwerk ein fliegender Druckplattenwechsel durchgeführt werden soll, dieses nachfolgend einem Druckplattenwechsel zu unterziehende Druckwerk zuerst wiederum durch Reinigen von Gummizylinder und Formzylinder auf den Druckplattenwechsel vorbereitet.According to a second variant, if an on-the-fly printing plate change is to be carried out immediately after another printing unit, this is subsequently carried out as a printing plate change The undergoing printing unit is first prepared for the printing plate change by cleaning the blanket cylinder and forme cylinder.

Das oben beschriebene, erfindungsgemäße Verfahren ist selbstverständlich auch dann einsetzbar, wenn an mehreren Druckwerken einer Druckmaschine während des Fortdrucks anderer Druckwerke ein fliegender Druckplattenwechsel durchgeführt werden soll.The method according to the invention described above can of course also be used when a printing plate change is to be carried out on several printing units of a printing press during the continuous printing of other printing units.

Mithilfe des erfindungsgemäßen Verfahrens ist ein besonders effizienter fliegender Druckplattenwechsel mit minimalem Makulaturdruck durchführbar. With the aid of the method according to the invention, a particularly efficient on-the-fly printing plate change can be carried out with minimal waste printing.

Claims (6)

  1. A method for operating a printing press, namely for carrying out a flying printing plate change on at least one printing couple of the printing press while other printing couples of the printing press are operated in the production run, wherein form cylinders of printing couples operated in the production run are each driven by an own drive or direct drive and inking couples and if applicable dampening units of the printing couples operated in the production run are driven by a main drive, and wherein on the or each printing couple, on which a printing plate change is carried out, ink form rollers of the inking couple and if applicable a dampening form roller of the dampening unit are disengaged from the respective form cylinder,
    characterised in that
    on the or each printing couple, on which a printing plate change is carried out, the inking couple and if applicable the dampening unit are driven by the own drive or direct drive assigned to the plate cylinder of the respective printing couple, and wherein the inking couple and the dampening unit are then driven with a significantly lower rotational speed than the rotational speed pre-set by the main drive,
    wherein in particular when on the or each printing couple, on which a printing plate change is carried out, the inking couple and if applicable the dampening unit are driven by the own drive or direct drive assigned to the plate cylinder of the respective printing couple, the inking couple and if applicable the dampening unit are decoupled from the main drive and coupled to the own drive or direct drive of the respective plate cylinder.
  2. The method according to Claim 1, characterised in that in particular when on a printing couple operated in the production run a printing plate change is to be carried out, the ink form rollers of the inking couple are disengaged from the form cylinder, wherein for cleaning the print form positioned on the form cylinder and for cleaning a rubber blanket of the form cylinder positioned on the rubber blanket cylinder interacting with the form cylinder, the form cylinder and rubber blanket cylinder of the printing couple remain in a print-on position.
  3. The method according to Claim 2, characterised in that following the disengaging of the ink form rollers of the inking couple from the form cylinder, the dampening form roller of the dampening unit remains engaged on the form cylinder for a predetermined period of time or for a predetermined number of cylinder revolutions.
  4. The method according to Claim 3, characterised in that even after the disengaging of the dampening form roller of the dampening unit from the form cylinder, the form cylinder and the rubber blanket cylinder still remain in the print-on position for a predetermined period of time or for a predetermined number of cylinder revolutions.
  5. The method according to any one or multiple of the Claims 1 to 4, characterised
    in that for carrying out a flying printing plate change on a printing couple of the printing press, while other printing couples of the printing press are operated in the production run, the following steps are passed through in succession;
    (a) on the printing couple operated in the production run, on which a printing plate change is to be carried out in the following, the ink form rollers are disengaged from the form cylinder, whereas the dampening form roller remains engaged on the form cylinder;
    (b) following a predetermined period of time or number of cylinder revolutions after the disengaging of the ink form rollers, the dampening form roller is also disengaged from the form cylinder;
    (c) after a further predetermined period of time or number of cylinder revolutions after the disengaging of the dampening form roller, form cylinder and rubber blanket cylinder are transferred into a print-off position;
    (d) following this, the printing plate change is carried out on the form cylinder, wherein the inking couple and dampening unit in the process are either driven by the main drive of the printing press or by the own drive of the form cylinder;
    (e) following the performed printing plate change, the ink form rollers and the dampening form roller are engaged on the form cylinder for preinking;
    (f) following this, form cylinder and rubber blanket cylinder of the printing couple are either transferred directly into a print-on position or, in the sense of the steps (a) to (c), another printing couple operated in the production run is first prepared for the printing plate change.
  6. The method according to Claim 5, characterised in that in particular when in step (f) another printing couple is first prepared for the printing plate change, the printing couples remaining in the production run during the steps (a) to (c), are temporarily transferred into a print-off position and subsequently again into the print-on position.
EP06017004.0A 2005-08-23 2006-08-16 Method for operating a printing press Active EP1757448B2 (en)

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DE102005040011.6A DE102005040011C5 (en) 2005-08-23 2005-08-23 Method for operating a printing machine

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EP1757448A3 EP1757448A3 (en) 2010-12-08
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DE102007058284A1 (en) 2007-12-04 2009-06-10 Manroland Ag Method for operating a sheet-fed printing machine
DE102008031860B4 (en) 2008-07-05 2012-10-04 manroland sheetfed GmbH Method for operating a sheet-fed printing machine
DE102010003385B4 (en) 2010-03-29 2023-04-13 Koenig & Bauer Ag Method for carrying out a job changeover on sheet-fed printing presses
DE102015118741A1 (en) 2014-11-02 2016-05-04 manroland sheetfed GmbH Drive for a sheet-fed offset printing press
CN106945401B (en) * 2017-02-21 2018-11-27 广东东方精工科技股份有限公司 A kind of carton press prevents the undesirable detection method of inking

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EP0812683A1 (en) † 1996-06-11 1997-12-17 MAN Roland Druckmaschinen AG Drive for a printing press
EP0834398A1 (en) † 1996-10-02 1998-04-08 MAN Roland Druckmaschinen AG Drive for a sheet-fed offset press
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Also Published As

Publication number Publication date
JP2007055259A (en) 2007-03-08
EP1757448B1 (en) 2013-05-29
DE102005040011C5 (en) 2021-03-18
DE102005040011A1 (en) 2007-03-01
JP4624324B2 (en) 2011-02-02
EP1757448A2 (en) 2007-02-28
DE102005040011B4 (en) 2016-02-11
CN1951688A (en) 2007-04-25
EP1757448A3 (en) 2010-12-08
CN100519180C (en) 2009-07-29

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