EP1567343B1 - Cleaning of rollers in printing presses - Google Patents

Cleaning of rollers in printing presses Download PDF

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Publication number
EP1567343B1
EP1567343B1 EP03769386A EP03769386A EP1567343B1 EP 1567343 B1 EP1567343 B1 EP 1567343B1 EP 03769386 A EP03769386 A EP 03769386A EP 03769386 A EP03769386 A EP 03769386A EP 1567343 B1 EP1567343 B1 EP 1567343B1
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EP
European Patent Office
Prior art keywords
rolls
printing
solvent
cleaning
doctor chamber
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EP03769386A
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German (de)
French (fr)
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EP1567343A1 (en
Inventor
Lutz Telljohann
Frank Dirksmeier
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Windmoeller and Hoelscher KG
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Windmoeller and Hoelscher KG
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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F35/00—Cleaning arrangements or devices
    • B41F35/02—Cleaning arrangements or devices for forme cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F35/00—Cleaning arrangements or devices
    • B41F35/04—Cleaning arrangements or devices for inking rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2235/00—Cleaning
    • B41P2235/10—Cleaning characterised by the methods or devices

Definitions

  • the invention relates to a method for cleaning components of rollers involved in the printing process, which remain during the cleaning process in the printing press and there are acted upon by solvents according to the preamble of claim 1.
  • the printing of a printing substrate in a flexographic printing machine is performed by a method in which the printing material is guided on a cylinder and a first roller, which is covered with printing plates, and the ink carried by the printing plate applied to the substrate.
  • the printing ink required for this purpose is removed by one or more further rollers from a doctoring chamber serving as a paint reservoir and transferred to the printing forms of the printing drum.
  • An apparatus for carrying out the method comprises a nozzle including a mixing chamber in which a fluid is provided by mixing pressurized air and a solvent.
  • the nozzle sprays the fluid in the direction of the pressure roller, whereby dust, fibers and other particles are released from the printing plate.
  • the device includes a nipple which sucks the fluid as well as dust, fibers and other particles from the printing forme.
  • the DE 195 48 535 A1 shows a cleaning method for a doctor blade chamber of a rotary printing machine. For cleaning, the residual color is pumped out of the doctor blade chamber and then rinsed with solvent in a closed circuit.
  • the US 5 213 044 A1 shows the cleaning method of an offset printing machine, wherein for cleaning the rollers involved in inking initially the remaining color pumped from the doctor chamber and then cleaning fluid is pumped into the same. The rollers continue to run and apply the residual color on a piece of waste of the printing material.
  • the EP 0 612 618 A2 shows a cleaning method for a coating system of an offset printing press. To clean this coating system, the coating fluid from the doctor blade chamber pumped and then pumped cleaning fluid and the applicator roll cleaned by turning.
  • the object of the invention is therefore to propose a method for cleaning components of rolls involved in the printing process, which does not require an additional device to be integrated in the inking unit and with which the components of all rollers involved in the printing process can be effectively cleaned.
  • the solution to this problem is achieved by a method for cleaning components of rolls involved in the printing process according to claim 1. Accordingly, first the standing in direct connection with the doctoring chamber roller is cleaned, while the operative connection with the or the other rollers is interrupted and then successively the operative connection between the respective cleaned roller and the next adjacent roller is restored. Thus, the roller which is in direct connection with the doctoring chamber is first cleaned, while no further roller is in contact with the roller which is in direct connection with the doctoring chamber. After cleaning one roller, the next adjacent roller is brought back into contact with the previously cleaned roller, again breaking the contact with the next adjacent and not yet cleaned roller. In this way, the components of all rollers involved in the printing process can be cleaned effectively successively.
  • the particular advantage of this method is that only the components of an inking unit are used to clean the components of rollers involved in the printing process, which are also necessary for the printing operation.
  • the roller in contact with the doctoring chamber removes printing ink from the further roller during the cleaning operation.
  • the ink is then washed away by the solvent in the doctoring chamber from the roller associated therewith.
  • the solvent is circulated within the doctoring chamber. This can be done in a closed circuit in which only one pump is switched between the discharge and supply. In a preferred embodiment, however, a portion of the solvent is continuously sucked out of the doctor blade chamber via the discharge line and passed, for example, into a dirt tank. The withdrawn volume is replaced by unpolluted solvent, which is fed to the doctoring chamber via the supply lines.
  • the roller in direct connection with the doctoring chamber is kept in constant rotation so that its individual surface areas are periodically brought into contact with the solvent to achieve complete washing off of the ink from the roller.
  • rollers that are in communication with each other rotate at the same peripheral speeds to avoid material abrasion of the components of the rollers.
  • the rollers, between which there is a connection are preferably made stronger against the printing operation.
  • the direction of rotation of the rollers is advantageously reversed at least once.
  • a control device is preferably provided on the printing press, which also permits manual intervention in the cleaning operation if required.
  • the ink comes in the desired format on the substrate by first on the supply line 9 from a color tank the doctoring chamber 2 is supplied.
  • the surface of the anilox roller has not shown, small depressions, the so-called wells into which the ink passes.
  • the printing form 8 is applied to the printing roller 4 and is moved by a rotation of the pressure roller 4 in the direction of arrow B to the printing substrate 5.
  • the printing plate 8 is the adhering to her ink to the substrate 5 from.
  • FIG. 2 shows the same inking unit 1 in the cleaning operation.
  • the pressure roller 4 may be turned off in the manner shown by the impression cylinder 6.
  • the directions of rotation B, C of the pressure roller 4 and the anilox roller 3 can be reversed compared to the printing operation.
  • the cleaning process is now started by removing the printing ink from the doctoring chamber 2.
  • the doctor chamber 2 is filled via the supply line 9 with solvent. So that the solvent can absorb as much ink from the anilox roll, this is circulated by constantly solvent is removed via the discharge line 10 from the doctoring chamber 2 and this and / or new solvent via the supply line 9 of the doctoring chamber 2 is supplied.
  • the pressure roller 4 If the pressure roller 4 is kept in rotation, all areas of the printing form 8 come into contact with the anilox roller 3 in one revolution, the printing form 8 delivering a portion of the ink adhering to it.
  • the anilox roller 3 can be made closer to the pressure roller 4, as in the FIG. 2 can be seen. Due to the previously performed passage of the wells through the doctoring chamber 2, these are completely or partially filled with solvent, whereby the ink transfer is even improved.
  • the pressurized ink cups of the anilox roller 3 are cleaned in a new circulation within the doctoring chamber 2. Of the Cleaning operation of the inking unit 1 is maintained until no more ink is on the printing form 8.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Cleaning In Electrography (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)

Abstract

Method for cleaning printer rollers in which the a doctor blade chamber (2) is filled with cleaning solvent. Effective communication during cleaning allows solvent transfer from the chamber to parts of the rollers involved in the printing process. The rollers rotate during cleaning transferring solvent from the chamber to the rollers involved in printing and returning diluted ink and dried ink that has been dissolved back to the chamber. The invention also relates to a corresponding control device for a print machine for automation implementation of a cleaning process.

Description

Die Erfindung betrifft ein Verfahren zum Reinigen von Bestandteilen von am Druckprozess beteiligten Walzen, welche während des Reinigungsprozesses in der Druckmaschine verbleiben und dort mit Lösungsmitteln beaufschlagt werden nach dem Oberbegriff des Anspruchs 1.The invention relates to a method for cleaning components of rollers involved in the printing process, which remain during the cleaning process in the printing press and there are acted upon by solvents according to the preamble of claim 1.

Das Bedrucken eines Bedruckstoffs in einer Flexodruckmaschine erfolgt durch ein Verfahren, bei dem der Bedruckstoff auf einem Zylinder geführt wird und eine erste Walze, die mit Druckformen belegt ist, und die von der Druckform getragene Druckfarbe auf den Bedruckstoff aufbringt. Die dazu benötigte Druckfarbe wird durch eine oder mehrere weitere Walze, aus einer als Farbreservoir dienenden Rakelkammer entnommen und auf die Druckformen der Druckwalze übertragen.The printing of a printing substrate in a flexographic printing machine is performed by a method in which the printing material is guided on a cylinder and a first roller, which is covered with printing plates, and the ink carried by the printing plate applied to the substrate. The printing ink required for this purpose is removed by one or more further rollers from a doctoring chamber serving as a paint reservoir and transferred to the printing forms of the printing drum.

Nach einem derartigen Druckvorgang ist es notwendig, die Bestandteile der verschiedenen Walze, beispielsweise die auf eine Druckwalze aufgebrachten Druckformen, zu reinigen, um ein Trocknen und Anhaften der zurückbleibenden Druckfarbe zu verhindern. Fest anhaftende Druckfarbe lässt sich nur mit erheblichem Aufwand entfernen. Die mechanischen Einwirkungen bei der Reinigung der Bestandteile von Walzen mit anhaftender Druckfarbe führen häufig zu Beschädigungen der Bestandteile von Walzen.After such a printing operation, it is necessary to clean the components of the various rolls, for example, the printing forms applied to a printing roll to prevent drying and sticking of the remaining printing ink. Firmly adhering ink can only be removed with considerable effort. The mechanical effects of cleaning the components of rollers with adhering ink often lead to damage to the components of rollers.

Es ist ein Verfahren zum Reinigen von Bestandteilen von am Druckprozess beteiligten Walzen bekannt, bei dem zunächst die Druckfarbe aus der Rakelkammer entfernt und die Rakelkammer mit Lösungsmittel befüllt wird, bei dem während der Reinigung eine einen Lösungsmittelübertrag gestattende Wirkverbindung zwischen der Rakelkammer und den zu reinigenden Bestandteilen von am Druckprozess beteiligten Walzen aufrecht erhalten wird und bei dem sich die Walzen während des Reinigungsprozesses drehen, so dass Lösungsmittel von der Rakelkammer auf die zu reinigenden Bestandteile der am Druckprozess beteiligten Walzen übertragen wird, dort Druckfarbe verdünnt und/oder angetrocknete Druckfarbe löst, welche durch die Drehung der Walzen zur Rakelkammer zurück transportiert werden,It is known a method for cleaning components of rolls involved in the printing process, in which first removes the ink from the doctor blade chamber and the doctor chamber with Solvent is filled, in which during the cleaning a solvent transfer permitting operative connection between the doctor chamber and the components to be cleaned by participating in the printing process rollers is maintained and in which the rollers rotate during the cleaning process, so that solvent from the doctor chamber on the zu cleaning components of the rollers involved in the printing process is transferred there thinned ink and / or dissolves dried ink, which are transported by the rotation of the rollers back to the doctor chamber,

Aus der Patentschrift EP 0 742 756 B1 ist ein Verfahren zur Reinigung von Druckformen bekannt, bei dem kleine Teilbereiche der Bestandteile der Walzen nacheinander gereinigt werden. Eine Vorrichtung zur Durchführung des Verfahrens umfasst eine Düse, die eine Mischkammer beinhaltet, in der ein Fluid durch Vermischen von druckbeaufschlagter Luft und einem Lösungsmittel bereitgestellt wird. Die Düse versprüht das Fluid in Richtung der Druckwalze, wobei Staub, Fasern und andere Partikel von der Druckform gelöst werden. Zusätzlich umfasst die Vorrichtung einen Sauger, der das Fluid sowie Staub, Fasern und andere Partikel von der Druckform absaugt.From the patent EP 0 742 756 B1 is a method for cleaning printing forms is known in which small portions of the components of the rollers are cleaned successively. An apparatus for carrying out the method comprises a nozzle including a mixing chamber in which a fluid is provided by mixing pressurized air and a solvent. The nozzle sprays the fluid in the direction of the pressure roller, whereby dust, fibers and other particles are released from the printing plate. In addition, the device includes a nipple which sucks the fluid as well as dust, fibers and other particles from the printing forme.

Die DE 195 48 535 A1 (oder US-A-5816163 ) zeigt ein Reinigungsverfahren für eine Rakelkammer einer Rotationsdruckmaschine. Zur Reinigung wird die Restfarbe aus der Rakelkammer abgepumpt und diese anschließend - in einem geschlossenen Kreislauf - mit Lösungsmittel gespült.The DE 195 48 535 A1 (or US-A-5816163 ) shows a cleaning method for a doctor blade chamber of a rotary printing machine. For cleaning, the residual color is pumped out of the doctor blade chamber and then rinsed with solvent in a closed circuit.

Die US 5 213 044 A1 zeigt das Reinigungsverfahren einer Offset-Druckmaschine, wobei zur Reinigung der am Farbauftrag beteiligten Walzen zunächst die restliche Farbe aus der Rakelkammer gepumpt und anschließend Reinigungsflüssigkeit in dieselbe eingepumpt wird. Die Walzen laufen weiter und tragen die Restfarbe auf ein Abfallstück des Bedruckstoffes auf.The US 5 213 044 A1 shows the cleaning method of an offset printing machine, wherein for cleaning the rollers involved in inking initially the remaining color pumped from the doctor chamber and then cleaning fluid is pumped into the same. The rollers continue to run and apply the residual color on a piece of waste of the printing material.

Die EP 0 612 618 A2 zeigt ein Reinigungsverfahren für ein Beschichtungssystem einer Offset-Druckmaschine. Zur Reinigung dieser Beschichtungsystems wird das Beschichtungsfluid aus der Rakelkammer gepumpt und anschließend Reinigungsflüssigkeit eingepumpt und die Auftragswalze durch Drehen gereinigt.The EP 0 612 618 A2 shows a cleaning method for a coating system of an offset printing press. To clean this coating system, the coating fluid from the doctor blade chamber pumped and then pumped cleaning fluid and the applicator roll cleaned by turning.

Aufgabe der Erfindung ist es daher, ein Verfahren zum Reinigen von Bestandteilen von am Druckprozess beteiligten Walzen vorzuschlagen, das ohne eine zusätzlich in das Farbwerk zu integrierende Vorrichtung auskommt und mit dem die Bestandteile aller am Druckprozess beteiligten Walzen effektiv gereinigt werden können.The object of the invention is therefore to propose a method for cleaning components of rolls involved in the printing process, which does not require an additional device to be integrated in the inking unit and with which the components of all rollers involved in the printing process can be effectively cleaned.

Die Lösung dieser Aufgabe wird durch ein Verfahren zum Reinigen von Bestandteilen von am Druckprozess beteiligten Walzen nach dem Anspruch 1 erreicht. Demnach wird zunächst die in direkter Verbindung mit der Rakelkammer stehende Walze gereinigt, während die Wirkverbindung mit der oder den anderen Walzen unterbrochen ist und dann wird sukzessive die Wirkverbindung zwischen der jeweils gereinigten Walze und der nächsten benachbarten Walze wieder hergestellt. Es wird also zunächst die in direkter Verbindung mit der Rakelkammer stehende Walze gereinigt, während keine weitere Walze in Kontakt mit der in direkter Verbindung mit der Rakelkammer stehenden Walze steht. Nach der Reinigung einer Walze wird die nächste benachbarte Walze wieder in Verbindung mit der zuvor gereinigten Walze gebracht, wobei wiederum der Kontakt zu der nächsten benachbarten und noch nicht gereinigten Walze unterbrochen wird. Auf diese Weise können sukzessive die Bestandteile aller am Druckprozess beteiligten Walzen effektiv gereinigt werden.The solution to this problem is achieved by a method for cleaning components of rolls involved in the printing process according to claim 1. Accordingly, first the standing in direct connection with the doctoring chamber roller is cleaned, while the operative connection with the or the other rollers is interrupted and then successively the operative connection between the respective cleaned roller and the next adjacent roller is restored. Thus, the roller which is in direct connection with the doctoring chamber is first cleaned, while no further roller is in contact with the roller which is in direct connection with the doctoring chamber. After cleaning one roller, the next adjacent roller is brought back into contact with the previously cleaned roller, again breaking the contact with the next adjacent and not yet cleaned roller. In this way, the components of all rollers involved in the printing process can be cleaned effectively successively.

Der besondere Vorteil dieses Verfahrens liegt darin, dass zum Reinigen der Bestandteile von am Druckprozess beteiligten Walzen lediglich die Komponenten eines Farbwerks benutzt werden, die auch für den Druckbetrieb notwendig sind. Im Gegensatz zum Druckbetrieb, in dem die mit der Rakelkammer in Kontakt stehende Walze mit Druckfarbe beaufschlagt wird und diese an eine weitere Walze abgibt, nimmt die mit der Rakelkammer in Kontakt stehende Walze im Reinigungsbetrieb Druckfarbe von der weiteren Walze ab. Die Druckfarbe wird dann durch das Lösungsmittel in der Rakelkammer von der mit dieser in Verbindung stehenden Walze abgewaschen.The particular advantage of this method is that only the components of an inking unit are used to clean the components of rollers involved in the printing process, which are also necessary for the printing operation. In contrast to the printing operation in which the roller which is in contact with the doctoring chamber is pressurized with ink and delivers it to a further roller, the roller in contact with the doctoring chamber removes printing ink from the further roller during the cleaning operation. The ink is then washed away by the solvent in the doctoring chamber from the roller associated therewith.

Vorteilhaft ist es dabei, wenn das Lösungsmittel innerhalb der Rakelkammer umgewälzt wird. Dies kann in einem geschlossenen Kreislauf geschehen, bei dem zwischen Abführ- und Zuführleitung lediglich eine Pumpe geschaltet wird. In einer bevorzugten Ausführungsform wird jedoch kontinuierlich ein Teil des Lösungsmittels über die Abführleitung aus der Rakelkammer abgesaugt und beispielsweise in einen Schmutztank geleitet. Das entnommene Volumen wird durch unverschmutztes Lösungsmittel ersetzt, das der Rakelkammer über die Zuführleitungen zugeführt wird.It is advantageous in this case if the solvent is circulated within the doctoring chamber. This can be done in a closed circuit in which only one pump is switched between the discharge and supply. In a preferred embodiment, however, a portion of the solvent is continuously sucked out of the doctor blade chamber via the discharge line and passed, for example, into a dirt tank. The withdrawn volume is replaced by unpolluted solvent, which is fed to the doctoring chamber via the supply lines.

Vorteilhafterweise wird die in direkter Verbindung mit der Rakelkammer stehende Walze in ständiger Rotation gehalten, damit deren einzelnen Oberflächenbereiche periodisch mit dem Lösungsmittel in Kontakt gebracht werden, um ein vollständiges Abwaschen der Druckfarbe von der Walze zu erreichen.Advantageously, the roller in direct connection with the doctoring chamber is kept in constant rotation so that its individual surface areas are periodically brought into contact with the solvent to achieve complete washing off of the ink from the roller.

Besonders vorteilhaft ist es dabei, wenn alle Walzen, die miteinander in Verbindung stehen, mit gleichen Umfangsgeschwindigkeiten drehen, um einen Materialabrieb von den Bestandteilen der Walzen zu vermeiden.It is particularly advantageous if all rollers that are in communication with each other, rotate at the same peripheral speeds to avoid material abrasion of the components of the rollers.

Um eine vollständige Abnahme der Druckfarbe von einer Walze durch eine andere Walze zu gewährleisten, werden die Walzen, zwischen denen eine Verbindung besteht, gegenüber dem Druckbetrieb vorzugsweise stärker aneinander angestellt.In order to ensure a complete decrease of the printing ink from one roller by another roller, the rollers, between which there is a connection, are preferably made stronger against the printing operation.

Da bei einer stärkeren Anstellung der Walzen die einzelnen Punkte auf den Druckformen einer Walkbewegung ausgesetzt werden können, besteht die Gefahr, dass die Bereiche um die Punkte der Druckformen nicht vollständig gereinigt werden. Um eine vollständige Reinigung zu erreichen, wird vorteilhafterweise die Drehrichtung der Walzen mindestens einmal umgekehrt.Since, when the rollers are more heavily set, the individual points on the printing plates can be subjected to a flexing motion, there is a risk that the areas around the points of the printing plates will not be completely cleaned. In order to achieve complete cleaning, the direction of rotation of the rollers is advantageously reversed at least once.

Zur automatischen Durchführung des beschriebenen Verfahrens ist bevorzugt an der Druckmaschine eine Steuereinrichtung vorgesehen, die im Bedarfsfall auch einen manuellen Eingriff in den Reinigungsbetrieb erlaubt.For automatically carrying out the described method, a control device is preferably provided on the printing press, which also permits manual intervention in the cleaning operation if required.

Die Erfindung wird anhand der Figuren näher beschrieben. Die einzelnen Figuren zeigen:

Fig. 1
Farbwerk einer Flexodruckmaschine im Druckbetrieb
Fig. 2
Farbwerk einer Flexodruckmaschine im Reinigungsbetrieb
The invention will be described in more detail with reference to FIGS. The individual figures show:
Fig. 1
Inking unit of a flexographic printing machine in printing operation
Fig. 2
Inking unit of a flexographic printing press in cleaning operation

Im Druckbetrieb eines Farbwerks 1 in einer Zentralzylinder-Druckmaschine gemäß Figur 1 gelangt die Druckfarbe im gewünschten Format auf den Bedruckstoff, indem sie zunächst über die Zuführleitung 9 aus einem Farbtank der Rakelkammer 2 zugeführt wird. Die Rasterwalze 3, die sich in Richtung des Pfeiles C dreht, übernimmt einen Teil der Druckfarbe. Dazu besitzt die Oberfläche der Rasterwalze nicht dargestellte, kleine Vertiefungen, die so genannten Näpfchen, in die die Druckfarbe gelangt. Die Näpfchen, die mit der Druckform 8 in Berührung kommen, geben dort ihre Druckfarbe ab. Die Druckform 8 ist auf der Druckwalze 4 aufgebracht und wird durch eine Rotation der Druckwalze 4 in Richtung des Pfeils B zum Bedruckstoff 5 bewegt. Dort gibt die Druckform 8 die an ihr haftende Druckfarbe an den Bedruckstoff 5 ab. Zum Zwecke des vollständigen Farbübertrags läuft der Bedruckstoff 5, der über eine Umlenkwalze 7 zugeführt wird, über den Gegendruckzylinder 6, der in Richtung des Pfeils A rotiert.In the printing operation of an inking unit 1 in a central cylinder printing machine according to FIG. 1 the ink comes in the desired format on the substrate by first on the supply line 9 from a color tank the doctoring chamber 2 is supplied. The anilox roller 3, which rotates in the direction of arrow C, takes over a part of the printing ink. For this purpose, the surface of the anilox roller has not shown, small depressions, the so-called wells into which the ink passes. The wells that come into contact with the printing forme 8, where their ink from. The printing form 8 is applied to the printing roller 4 and is moved by a rotation of the pressure roller 4 in the direction of arrow B to the printing substrate 5. There, the printing plate 8 is the adhering to her ink to the substrate 5 from. For the purpose of complete ink transfer of the printing material 5, which is supplied via a deflection roller 7, passes over the impression cylinder 6, which rotates in the direction of arrow A.

Figur 2 zeigt das gleiche Farbwerk 1 im Reinigungsbetrieb. Zur Reinigung der Druckform 8 kann die Druckwalze 4 in gezeigter Weise vom Gegendruckzylinder 6 abgestellt sein. Die Drehrichtungen B, C der Druckwalze 4 und der Rasterwalze 3 können im Vergleich zum Druckbetrieb umgekehrt sein. Der Reinigungsvorgang wird nun gestartet, indem die Druckfarbe aus der Rakelkammer 2 entfernt wird. Anschließend wird die Rakelkammer 2 über die Zuführleitung 9 mit Lösungsmittel befüllt. Damit das Lösungsmittel möglichst viel Druckfarbe von der Rasterwalze aufnehmen kann, wird dieses umgewälzt, indem ständig Lösungsmittel über die Abführleitung 10 aus der Rakelkammer 2 entnommen wird und dieses und/oder neues Lösungsmittel über die Zuführleitung 9 der Rakelkammer 2 zugeführt wird. Wird die Druckwalze 4 in Rotation gehalten, kommen in einem Umlauf alle Bereiche der Druckform 8 mit der Rasterwalze 3 in Berührung, wobei die Druckform 8 einen Teil der an ihr haftenden Druckfarbe abgibt. Um einen guten Farbübertrag zu gewährleisten, kann die Rasterwalze 3 näher an die Druckwalze 4 angestellt sein, wie es in der Figur 2 zu erkennen ist. Auf Grund des zuvor erfolgten Durchlaufs der Näpfchen durch die Rakelkammer 2 sind diese ganz oder teilweise mit Lösungsmittel befüllt, wodurch der Farbübertrag sogar noch verbessert wird. Die mit Druckfarbe beaufschlagten Näpfchen der Rasterwalze 3 werden in einem neuen Umlauf innerhalb der Rakelkammer 2 gereinigt. Der Reinigungsbetrieb des Farbwerks 1 wird so lange aufrecht erhalten, bis sich keine Druckfarbe mehr auf der Druckform 8 befindet. Bezugszeichenliste 1 Farbwerk 2 Rakelkammer 3 Rasterwalze 4 Druckwalze 5 Bedruckstoff 6 Gegendruckzylinder 7 Umlenkwalze 8 Druckform 9 Zuführleitung 10 Abführleitung A Drehrichtung des Gegendruckzylinders B Drehrichtung der Druckwalze C Drehrichtung der Rasterwalze FIG. 2 shows the same inking unit 1 in the cleaning operation. To clean the printing plate 8, the pressure roller 4 may be turned off in the manner shown by the impression cylinder 6. The directions of rotation B, C of the pressure roller 4 and the anilox roller 3 can be reversed compared to the printing operation. The cleaning process is now started by removing the printing ink from the doctoring chamber 2. Subsequently, the doctor chamber 2 is filled via the supply line 9 with solvent. So that the solvent can absorb as much ink from the anilox roll, this is circulated by constantly solvent is removed via the discharge line 10 from the doctoring chamber 2 and this and / or new solvent via the supply line 9 of the doctoring chamber 2 is supplied. If the pressure roller 4 is kept in rotation, all areas of the printing form 8 come into contact with the anilox roller 3 in one revolution, the printing form 8 delivering a portion of the ink adhering to it. In order to ensure a good ink transfer, the anilox roller 3 can be made closer to the pressure roller 4, as in the FIG. 2 can be seen. Due to the previously performed passage of the wells through the doctoring chamber 2, these are completely or partially filled with solvent, whereby the ink transfer is even improved. The pressurized ink cups of the anilox roller 3 are cleaned in a new circulation within the doctoring chamber 2. Of the Cleaning operation of the inking unit 1 is maintained until no more ink is on the printing form 8. LIST OF REFERENCE NUMBERS 1 inking 2 blade chamber 3 anilox roller 4 platen 5 substrate 6 Impression cylinder 7 deflecting 8th printing form 9 feed 10 discharge A Direction of rotation of the impression cylinder B Direction of rotation of the pressure roller C Direction of rotation of the anilox roller

Claims (7)

  1. Method for cleaning constituent parts (8) of rolls which have participated in the printing process, remain in the printing press during the cleaning process and are loaded there with solvents,
    - the printing ink being removed from the doctor chamber (2), and the doctor chamber (2) being filled with solvent, and
    - an operative connection, which permits a solvent transfer, between the doctor chamber (2) and the constituent parts (8) of rolls (3, 4) which have participated in the printing process and are to be cleaned being maintained during the cleaning, and
    - the rolls (3, 4) rotating during the cleaning process,
    - with the result that solvent is transferred from the doctor chamber (2) to the constituent parts to be cleaned of the rolls (3, 4) which have participated in the printing process, thinning ink there and/or detaching dried ink residues which are transported back to the doctor chamber by the rotation of the rolls (3, 4),
    characterized in that
    constituent parts (8) of a plurality of rolls (3, 4) are cleaned, first of all the roll (3) being cleaned which is in direct connection to the doctor chamber, while the operative connection to the other roll or rolls (4) is interrupted and then the operative connection between the respectively cleaned roll (3) and the next adjacent roll (4) is restored successively.
  2. Method according to Claim 1, characterized in that the solvent is circulated continuously within the doctor chamber (2).
  3. Method according to Claim 2, characterized in that part of the solvent is extracted by suction from the doctor chamber (2) via a discharging line (10), and in that part of the discharged and/or uncontaminated solvent is fed to the doctor chamber (2) via a feed line (9).
  4. Method according to one of the preceding claims, characterized in that, in order to clean it, the roll (3) which is in direct connection with the doctor chamber is kept in constant rotation and in constant contact with the solvent which is contained in the doctor chamber (2).
  5. Method according to one of the preceding claims, characterized in that the rolls (3, 4), between which there is an operative connection, rotate at identical circumferential speeds.
  6. Method according to one of the preceding claims, characterized in that, during cleaning operation, the rolls (3, 4), between which there is an operative connection, are set more forcefully against one another than during printing operation.
  7. Method according to one of the preceding claims, characterized in that the rotational direction of the rolls (3, 4) is reversed at least once.
EP03769386A 2002-11-06 2003-10-14 Cleaning of rollers in printing presses Expired - Lifetime EP1567343B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10252013 2002-11-06
DE10252013A DE10252013B4 (en) 2002-11-06 2002-11-06 Cleaning of rollers in printing machines
PCT/EP2003/011356 WO2004041540A1 (en) 2002-11-06 2003-10-14 Cleaning of rollers in printing presses

Publications (2)

Publication Number Publication Date
EP1567343A1 EP1567343A1 (en) 2005-08-31
EP1567343B1 true EP1567343B1 (en) 2011-03-16

Family

ID=32185356

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03769386A Expired - Lifetime EP1567343B1 (en) 2002-11-06 2003-10-14 Cleaning of rollers in printing presses

Country Status (7)

Country Link
US (1) US20060032389A1 (en)
EP (1) EP1567343B1 (en)
AT (1) ATE501855T1 (en)
AU (1) AU2003278080A1 (en)
DE (2) DE10252013B4 (en)
ES (1) ES2360094T3 (en)
WO (1) WO2004041540A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0601855D0 (en) * 2006-01-30 2006-03-08 Rue Currency And Security Prin Intaglio plate wiping system
DE102009006268B4 (en) 2008-02-26 2017-12-14 Heidelberger Druckmaschinen Ag Method for cleaning a lateral surface of a blanket cylinder of a wet offset printing press
US20140216502A1 (en) * 2013-02-05 2014-08-07 Ecochem Australia Pty Ltd System and method for automatically cleaning converters
DE102014003569A1 (en) * 2013-03-22 2014-09-25 Heidelberger Druckmaschinen Ag Method for cleaning an anilox printing unit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19548535A1 (en) * 1995-12-22 1997-07-03 Windmoeller & Hoelscher Method and device for cleaning a doctor blade device for a rinsing inking unit of a rotary printing press

Family Cites Families (10)

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Publication number Priority date Publication date Assignee Title
US5213044A (en) * 1990-11-30 1993-05-25 Como Technologies, Incorporated Method and apparatus for use in printing
US5184556A (en) * 1992-02-18 1993-02-09 Paper Converting Machine Company Printing apparatus and method
US5367982A (en) 1993-02-25 1994-11-29 Howard W. DeMoore Automatic coating circulation and wash-up system for printing presses
DK83193A (en) * 1993-07-09 1995-01-10 Tresu A S Maskinfabriken Method and apparatus for cleaning the surface of a roller
US6435086B1 (en) * 1995-05-04 2002-08-20 Howard W. DeMoore Retractable inking/coating apparatus having ferris movement between printing units
DE19516456C2 (en) * 1995-05-04 1999-04-15 Windmoeller & Hoelscher Device for cleaning a doctor blade device for a rinsing inking unit of a rotary printing press
DK173668B1 (en) * 1997-03-24 2001-06-05 Tresu As Process and pump unit for supplying a printing plant with color and cleaning liquid
US6012391A (en) * 1997-05-02 2000-01-11 The Langston Corporation Ink/cleaning fluid delivery system for a chambered doctor blade
US5768993A (en) * 1997-05-09 1998-06-23 Bryce International, L.L.C. Inking system for offset printers
DE29918488U1 (en) * 1999-10-20 1999-12-30 MAN Roland Druckmaschinen AG, 63075 Offenbach Sheet-fed rotary printing machine with printing units for multi-color printing and at least one coating unit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19548535A1 (en) * 1995-12-22 1997-07-03 Windmoeller & Hoelscher Method and device for cleaning a doctor blade device for a rinsing inking unit of a rotary printing press

Also Published As

Publication number Publication date
DE10252013A1 (en) 2004-05-27
EP1567343A1 (en) 2005-08-31
US20060032389A1 (en) 2006-02-16
DE10252013B4 (en) 2008-01-17
ES2360094T3 (en) 2011-05-31
WO2004041540A1 (en) 2004-05-21
AU2003278080A1 (en) 2004-06-07
ATE501855T1 (en) 2011-04-15
DE50313553D1 (en) 2011-04-28

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