EP0839652A2 - Method for cleaning cylinders and rollers in a printing machine - Google Patents

Method for cleaning cylinders and rollers in a printing machine Download PDF

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Publication number
EP0839652A2
EP0839652A2 EP97117937A EP97117937A EP0839652A2 EP 0839652 A2 EP0839652 A2 EP 0839652A2 EP 97117937 A EP97117937 A EP 97117937A EP 97117937 A EP97117937 A EP 97117937A EP 0839652 A2 EP0839652 A2 EP 0839652A2
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EP
European Patent Office
Prior art keywords
roller
dampening
rollers
unit
driven
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Granted
Application number
EP97117937A
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German (de)
French (fr)
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EP0839652B1 (en
EP0839652A3 (en
Inventor
Joachim Dipl.-Phys. Müller
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Manroland AG
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MAN Roland Druckmaschinen AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F35/00—Cleaning arrangements or devices

Definitions

  • the invention relates to a method for cleaning cylinders and rollers in a printing press, preferably an offset printing press or an inline coating unit according to the preamble of the respective main claim.
  • a method for cleaning cylinders and rollers is known from DE 195 01 806 A1, according to which the dampening unit roller train is also cleaned.
  • the dampening roller unit is integrated into the inking unit roller by means of a bridge roller.
  • the dampening roller can be turned on or off by the plate cylinder.
  • a dampening unit for an offset printing press is known from EP 0 450 155 B1, in which a dampening application roller is mounted on and off for the plate cylinder and for a dampening roller (immersion roller).
  • the dampening roller is driven by the plate cylinder, i.e. when switched on and off, it runs at its peripheral speed.
  • the dampening roller immersed in a dampening solution tank has its own, speed-controllable drive, so that the required amount of dampening solution can be fed in according to the dampening solution requirement of the printing form at different machine speeds.
  • the coating device has a scoop roller and an applicator roller in contact with a forme cylinder. Furthermore, the scoop roller is assigned to a metering roller. The scoop roller is coupled via a gear transmission to a separate speed-controllable and direction-switchable electric drive.
  • the cleaning fluid which reduces the coefficient of friction, the color to be processed or the varnish, the roller pressure and or the material pairing itself reduce the external friction of at least two rollers in contact with one another on their contact surfaces in such a way that the transferable peripheral force goes to zero.
  • at least one roller can stop "or stick-slip movements occur on the roller surface.
  • a stationary roller acts like a wiping element (analogous to a doctor blade) and squeegees the detergent ink / varnish.
  • the emulsion can get into the dampening solution container or, if necessary, into a lacquer storage container and contaminate the liquid medium present there, so contaminated liquid media have to be exchanged, which means additional effort.
  • the object of the invention is therefore to provide a method which avoids the disadvantages mentioned, in particular in the operating mode Cleaning of rollers "(and of cylinders) the external friction is maintained so that a drop in the transferable peripheral force in the roller pair is avoided.
  • a printing unit of a preferably offset printing machine it is provided to clean the plate cylinder and the dampening unit roller in addition to the inking unit roller train.
  • the inking unit roller, the plate cylinder and the dampening unit roller can be included in the cleaning process individually, in groups or together will.
  • the dampening roller unit is integrated into the inking unit roller via a bridge roller.
  • the dampening roller of the dampening unit roller can also be placed on the plate cylinder.
  • a vegetable cleaning agent and / or water is used as the cleaning fluid.
  • the dampening solution has been removed from the dampening solution container or has been lowered so far that the dampening roller no longer dips into the dampening solution.
  • the dampening duct is coupled to the separate speed-controllable drive and is driven for a limited time at an excessive speed in relation to a maximum production humidity value that is common in printing operations.
  • the machine speed of the printing unit is set to the speed at which the dampening roller driven by the plate cylinder has a synchronous peripheral speed to the separately driven dampening roller.
  • the working method is not limited to a single drum roller in a printing unit. Rather, this is also suitable for coating units which, in addition to the forme cylinder, have at least one application roller and an adjacent duct roller (two-roller mill).
  • the metering roller can additionally be assigned a metering roller, or further transfer rollers can be arranged between the application roller and the doctor roller.
  • a spray tube is assigned to the roll nip for the application of cleaning fluid.
  • the duct roller is also coupled to a separate speed-controllable motor drive.
  • the application roller is coupled to the forme cylinder via a gear drive.
  • the duct roller is driven at a speed that is temporarily increased to a value analogous to the dampening unit operation.
  • the applicator roller is driven by the forme cylinder and this with synchronous peripheral speed.
  • the printing unit essentially consists of an inking roller 4, a dampening roller 3, a plate cylinder 1 and a blanket cylinder 2.
  • the inking roller 4 is assigned a spray device which can be operated with a vegetable cleaning agent and / or water.
  • the plate cylinder 1 is assigned to the inking roller train 4, inking rollers 13 and a dampening roller roller 3 belonging to the dampening roller train 3 can be switched on and off.
  • the dampening unit roller train 3 can be coupled to the inking unit roller train 4 via a bridge roller 5. Further components of the printing unit will not be discussed here.
  • a doctor device 11 is arranged on one of the last rollers of the inking unit roller train 4, which is received in a swivel joint and can be pivoted to the roller by means of an actuating device 10 for switching it on and off.
  • the actuating device 10 and the spray device can be controlled by means of a control station.
  • the dampening unit roller train 3 has a dampening roller 7 which is coupled to a separate, speed-controllable drive and which is immersed in a dampening agent reservoir 9.
  • the dampening roller 7 is in contact with a metering roller 8.
  • the bridge roller 5 is assigned to the dampening roller 6 as a rider roller.
  • the dampening roller can carry an additional rider roller 12 which is arranged adjacent to the bridge roller 5.
  • the bridge roller 5 resting on the dampening roller 6 is coupled to the inking roller 4.
  • the dampening unit roller 3 is thus integrated into the inking unit roller 4.
  • the drive of the dampening duct 7 is activated and the dampening duct 7 is operated for a limited time at an excessive peripheral speed in relation to a value customary in printing operation.
  • the machine speed of the printing unit is set to a defined speed at which the peripheral speeds of the dampening roller 6 driven by the plate cylinder 1 are synchronized with the dampening roller 7. It has been found that, for the cleaning process, favorable synchronous speeds in a range from 3000 to 8000 sheets per hour can be achieved.
  • the metering roller 8 adjacent to the dampening roller 7 is driven by the damping roller 7 by means of friction.
  • dampening roller 3 If the dampening roller 3 is designed with an additional rider roller 12 resting on the dampening roller 6, it can be pivoted from its position 12 in the direction of the metering roller 8 in such a way that the rider roller 12 then assumes the position 12 'and with the dampening roller 6 and Metering roller 8 is in contact. This roller position 12 'additionally increases the transferable peripheral force.
  • the wet doctor 7 is driven as already described.
  • roller train of a coating unit is shown.
  • An application roller 15 is in contact with a forme cylinder 14.
  • a duct roller 17 immersing in a paint reservoir 19 is arranged, and both rollers 15, 17 are coupled by a transfer roller 16.
  • the doctor roller 17 carries a metering roller 18.
  • a spray tube for cleaning fluid (not shown) is assigned to the roller gap, which is formed from the transfer roller 16 and the doctor roller 17.
  • the duct roller 17 is coupled to a separate, speed-controllable drive and the application roller 15 engages in a form-fitting manner with the drive of the forme cylinder 14.
  • the duct roller 17 is driven for a limited time by the drive to a speed value which exceeds the usual production paint value.
  • the peripheral speed of the application roller 15 is controlled by the forme cylinder 14 in such a way that the duct roller 17 and the application roller 15 can be operated at a synchronous peripheral speed.

Abstract

The method uses a train of inker rollers (4) which has a spray and doctor arrangement. At least one train of damping rollers (3) possesses a humidity-application roller (6) and a humidity-ductor (7). The train of damping rollers is integrated in the train of inking rollers by a bridge roller (5). A rider roller (12) frictionally connected to the humidity-applicator roller is in frictional contact with a dispenser roller belonging to the humidity-ductor. The humidity-applicator roller is driven at a peripheral speed synchronous with that of the humidity-ductor.

Description

Die Erfindung betrifft ein Verfahren zur Reinigung von Zylindern und Walzen in einer Druckmaschine, vorzugsweise einer Offsetdruckmaschine oder einem Inline-Lackierwerk nach dem Oberbegriff des jeweiligen Hauptanspruches.The invention relates to a method for cleaning cylinders and rollers in a printing press, preferably an offset printing press or an inline coating unit according to the preamble of the respective main claim.

Aus der DE 195 01 806 A1 ist ein Verfahren zur Reinigung von Zylindern und Walzen bekannt, nach dem auch der Feuchtwerkswalzenzug gereinigt wird. Dazu wird der Feuchtwerkswalzenzug mittels einer Brückenwalze in den Farbwerkswalzenzug integriert. Die Feuchtauftragwalze kann dabei vom Plattenzylinder an- oder abgestellt werden.A method for cleaning cylinders and rollers is known from DE 195 01 806 A1, according to which the dampening unit roller train is also cleaned. For this purpose, the dampening roller unit is integrated into the inking unit roller by means of a bridge roller. The dampening roller can be turned on or off by the plate cylinder.

Aus der EP 0 450 155 B1 ist ein Feuchtwerk für eine Offsetdruckmaschine bekannt, bei welchem eine Feuchtauftragswalze zum Plattenzylinder und zu einem Feuchtduktor (Tauchwalze) an- und abstellbar gelagert ist. Die Feuchtauftragwalze wird vom Plattenzylinder angetrieben, d.h. im an- als auch abgestelltem Zustand läuft sie mit dessen Umfangsgeschwindigkeit. Die in einem Feuchtmittelbehälter eintauchende Feuchtduktorwalze weist einen eigenen, drehzahlsteuerbaren Antrieb auf, so daß entsprechend des Feuchtmittelbedarfes der Druckform bei unterschiedlichen Maschinengeschwindigkeiten die notwenige Feuchtmittelmenge zuführbar ist.A dampening unit for an offset printing press is known from EP 0 450 155 B1, in which a dampening application roller is mounted on and off for the plate cylinder and for a dampening roller (immersion roller). The dampening roller is driven by the plate cylinder, i.e. when switched on and off, it runs at its peripheral speed. The dampening roller immersed in a dampening solution tank has its own, speed-controllable drive, so that the required amount of dampening solution can be fed in according to the dampening solution requirement of the printing form at different machine speeds.

Gemäß der DE 36 38 469 A1 ist ein Verfahren und eine Vorrichtung zum Antrieb einer Lackiereinrichtung bekannt. Die Lackiereinrichtung besitzt eine Schöpfwalze und eine mit einem Formzylinder in Kontakt stehende Auftragwalze. Weiterhin ist der Schöpfwalze einer Dosierwalze zugeordnet. Die Schöpfwalze ist über ein Zahnradgetriebe mit einem separaten drehzahlsteuerbaren und drehrichtungsumschaltbaren Elektroantrieb gekoppelt. Beim Walzenwaschen kann insbesondere durch das die Reibungszahl reduzierende Reinigungsfluid, die zu verarbeitende Farbe bzw. der Lack, die Walzenpressung und oder die Werksstoffpaarung selbst die äußere Reibung von mindestens zwei sich berührenden Walzen an deren Kontaktflächen derart reduzieren, daß die übertragbare Umfangskraft gegen Null geht. D.h. im Extremfall kann wenigstens eine Walze

Figure imgb0001
stehenbleiben" oder es treten Stick-Slip-Bewegungen an der Walzenoberfläche auf Dies wirkt sich negativ auf die Standzeit der Walzen im jeweiligen Druckwerk aus. Weiterhin wirkt eine stehenbleibende Walze wie ein Abstreifelement (analog einer Rakel) und rakelt die Waschmittel-Farb/Lack-Emulsion von der benachbarten Walze ab. Dabei kann die Emulsion in den Feuchtmittelbehälter oder ggf. in einen Lackvorratsbehälter gelangen und das dort jeweils vorhandene flüssige Medium verunreinigen. Derart verschmutzte flüssige Medien müssen zwangsläufig ausgetauscht werden, was zusätzlichen Aufwand darstellt.According to DE 36 38 469 A1, a method and a device for driving a painting device is known. The coating device has a scoop roller and an applicator roller in contact with a forme cylinder. Furthermore, the scoop roller is assigned to a metering roller. The scoop roller is coupled via a gear transmission to a separate speed-controllable and direction-switchable electric drive. In the case of roller washing, the cleaning fluid which reduces the coefficient of friction, the color to be processed or the varnish, the roller pressure and or the material pairing itself reduce the external friction of at least two rollers in contact with one another on their contact surfaces in such a way that the transferable peripheral force goes to zero. In extreme cases, at least one roller can
Figure imgb0001
stop "or stick-slip movements occur on the roller surface. This has a negative effect on the service life of the rollers in the respective printing unit. Furthermore, a stationary roller acts like a wiping element (analogous to a doctor blade) and squeegees the detergent ink / varnish. The emulsion can get into the dampening solution container or, if necessary, into a lacquer storage container and contaminate the liquid medium present there, so contaminated liquid media have to be exchanged, which means additional effort.

Weiterhin führt dies zu längeren Waschzeiten mit erhöhtem Waschmittelverbrauch. Durch das

Figure imgb0001
stehenbleiben" einer Walze, kann sich Farbe bzw. Lack oder eine Emulsion an der Walzenoberfläche aufbauen, was ein manuelles Nachreinigen erfordert. Ein mögliches Verschmutzen des in einem Vorratsbehälter verbliebenen flüssigen Mediums ist ebenso nicht auszuschließen, da eine stehenbleibende Walze eine Abstreiffunktion erfüllt und beispielsweise die Emulsion von der Walzenoberfläche abrakelt, welche dabei in den Vorratsbehälter laufen kann.Furthermore, this leads to longer washing times with increased detergent consumption. By the
Figure imgb0001
"Stopping" of a roller, paint or varnish or an emulsion can build up on the roller surface, which requires manual cleaning. A possible contamination of the liquid medium remaining in a storage container cannot be ruled out either, since a stationary roller fulfills a wiping function and, for example, the Wipe off emulsion from the roller surface, which can run into the reservoir.

Aufgabe der Erfindung ist es daher ein Verfahren zu schaffen, daß die genannten Nachteile vermeidet, daß insbesondere in der Betriebsart

Figure imgb0001
Reinigen von Walzen" (und von Zylindern) die äußere Reibung aufrecht erhalten wird, so daß ein Abfallen der übertragbaren Umfangskraft in der Walzenpaarung vermieden wird.The object of the invention is therefore to provide a method which avoids the disadvantages mentioned, in particular in the operating mode
Figure imgb0001
Cleaning of rollers "(and of cylinders) the external friction is maintained so that a drop in the transferable peripheral force in the roller pair is avoided.

Die Aufgabe wird durch die Ausbildungsmerkmale von Anspruch 1 und 3 gelöst.Weiterbildungen ergeben sich aus den Unteransprüchen.The task is solved by the training features of claims 1 and 3. Further developments result from the subclaims.

In einem Druckwerk einer vorzugsweise Offsetdruckmaschine ist vorgesehen, neben dem Farbwerkswalzenzug auch den Plattenzylinder und den Feuchtwerkwalzenzug zu reinigen. Mittels einer Steuerung kann einzeln, gruppenweise oder gemeinsam der Farbwerkswalzenzug, der Plattenzylinder sowie der Feuchtwerkswalzenzug in den Reinigungsprozess einbezogen werden. Für die Betriebsart

Figure imgb0001
Reinigen von Walzen" wird über eine Brückenwalze der Feuchtwerkswalzenzug in den Farbwerkswalzenzug integriert.
Wahlweise kann die Feuchtauftragwalze des Feuchtwerkswalzenzuges zusätzlich an den Plattenzylinder angestellt werden.
Im Reinigungsprozess wird als Reinigungsfluid, vorzugsweise ein vegetabiles Reinigunsmittel und /oder Wasser verwendet. Das Feuchtmittel ist aus dem Feuchtmittelbehälter entfernt oder soweit abgesenkt, daß der Feuchtduktor nicht mehr in das Feuchtmittel eintaucht. Der Feuchtduktor wird mit dem separaten drehzahlsteuerbaren Antrieb gekoppelt und bezogen auf einen im Druckbetrieb üblichen maximalen Produktionsfeuchtwert zeitlich begrenzt mit überhöhter Drehzahl angetrieben. Gleichzeitig wird die Maschinengeschwindigkeit des Druckwerkes auf die Drehzahl eingestellt, bei der die vom Plattenzylinder angetriebene Feuchtauftragwalze zum separat angetriebenen Feuchtduktor eine synchrone Umfangsgeschwindigkeit aufweist.In a printing unit of a preferably offset printing machine, it is provided to clean the plate cylinder and the dampening unit roller in addition to the inking unit roller train. The inking unit roller, the plate cylinder and the dampening unit roller can be included in the cleaning process individually, in groups or together will. For the operating mode
Figure imgb0001
Cleaning rollers ", the dampening roller unit is integrated into the inking unit roller via a bridge roller.
Optionally, the dampening roller of the dampening unit roller can also be placed on the plate cylinder.
In the cleaning process, preferably a vegetable cleaning agent and / or water is used as the cleaning fluid. The dampening solution has been removed from the dampening solution container or has been lowered so far that the dampening roller no longer dips into the dampening solution. The dampening duct is coupled to the separate speed-controllable drive and is driven for a limited time at an excessive speed in relation to a maximum production humidity value that is common in printing operations. At the same time, the machine speed of the printing unit is set to the speed at which the dampening roller driven by the plate cylinder has a synchronous peripheral speed to the separately driven dampening roller.

Das Arbeitsverfahren ist jedoch nicht aufeinen Walzenzug in einem Druckwerk beschränkt. Vielmehr eignet sich dieses auch für Lackiereinheiten, die neben dem Formzylinder wenigstens eine Auftragwalze und eine benachbarte Duktorwalze (Zweiwalzenwerk) aufweisen. Dabei kann der Duktorwalze zusätzlich eine Dosierwalze zugeordnet, oder zwischen Auftragswalze und Duktorwalze weitere Übertragwalzen angeordnet werden. Dem Walzenspalt ist ein Sprührohr zugeordnet für das Aufbringen von Reiningungsfluid. Die Duktorwalze ist in einer Lackiereinheit dieser Art ebenfalls mir einem separaten drehzahlsteuerbaren Motorantrieb gekoppelt. Die Auftragwalze ist über ein Zahnradgetriebe mit dem Formzylinder gekoppelt. Für die Betriebsart

Figure imgb0001
Reinigen der Walzen" wird die Duktorwalze analog zum Feuchtwerksbetrieb in ihrer Drehzahl aufeinen Wert zeitlich begrenzt überhöht angetrieben. Gleichzeitig zur Duktorwalze wird die Auftragwalze vom Formzylinder angetrieben und dies mit synchroner Umfangsgeschwindigkeit.
Der Vorteil dieser Ausführungen ist, daß eine spürbare Ergebnisverbesserung beim Walzenreinigen erzielt wird, indem die Walzen im Feuchtwerkswalzenzug oder im Lackierwerk schneller gereinigt werden. Dabei kann auch der Plattenzylinder in den Reinigungsprozess integriert werden, indem die Feuchtauftragswalze bzw. die Lackauftragswalze während des Reinigungsprozesses mit dem Plattenzylinder in Kontakt steht. Das
Figure imgb0001
stehenbleiben" einer Walze wird vermieden und somit verringern sich der Reinigungsfluidverbrauch sowie die Reinigungszeit. Auch das Verschmutzen des Vorratsbehälters und das damit verbundene Säubern entfällt.However, the working method is not limited to a single drum roller in a printing unit. Rather, this is also suitable for coating units which, in addition to the forme cylinder, have at least one application roller and an adjacent duct roller (two-roller mill). In this case, the metering roller can additionally be assigned a metering roller, or further transfer rollers can be arranged between the application roller and the doctor roller. A spray tube is assigned to the roll nip for the application of cleaning fluid. In a painting unit of this type, the duct roller is also coupled to a separate speed-controllable motor drive. The application roller is coupled to the forme cylinder via a gear drive. For the operating mode
Figure imgb0001
Cleaning the rollers, the duct roller is driven at a speed that is temporarily increased to a value analogous to the dampening unit operation. At the same time as the duct roller, the applicator roller is driven by the forme cylinder and this with synchronous peripheral speed.
The advantage of these designs is that a noticeable improvement in the result of roller cleaning is achieved by the rollers being cleaned more quickly in the dampening unit roller train or in the coating unit. The plate cylinder can also be integrated into the cleaning process in that the dampening roller or the lacquer roller is in contact with the plate cylinder during the cleaning process. The
Figure imgb0001
"Stand still" of a roller is avoided and thus the cleaning fluid consumption and the Cleaning time. Soiling of the storage container and the associated cleaning are also eliminated.

Die Erfindung soll an einem Ausführungsbeispiel näher erläutert werden.
Dabei zeigt:

Fig. 1
ein Druckwerk einer Offsetdruckmaschine,
Fig. 2
eine Lackiereinheit.
The invention will be explained in more detail using an exemplary embodiment.
It shows:
Fig. 1
a printing unit of an offset printing machine,
Fig. 2
a painting unit.

Das Druckwerk besteht im wesentlichen aus einem Farbauftagwalzenzug 4, einem Feuchtauftragwalzenzug 3, einem Plattenzylinder 1 und einem Gummituchzylinder 2. Dem Farbwerkswalzenzug 4 ist eine Sprüheinrichtung zugeordnet, die mit einem vegetabilen Reinigungsmittel und/ oder Wasser betreibbar ist. Dem Plattenzylinder 1 sind zum Farbauftragwalzenzug 4 gehörende Farbauftragwalzen 13 sowie eine zum Feuchtwerkwalzenzug 3 gehörende Feuchtauftragwalze 6 an- und abstellbar zugeordnet. Der Feuchtwerkswalzenzug 3 ist über eine Brückenwalze 5 mit dem Farbwerkswalzenzug 4 koppelbar. Auf weitere Bauteile des Druckwerkes soll hier nicht eingegangen werden.
In Drehrichtung des Plattenzylinders 1 gesehen ist an einer der letzten Walzen des Farbwerkswalzenzuges 4 eine Rakeleinrichtung 11 angeordnet, die in einem Drehgelenk aufgenommen ist und mittels einer Betätigungseinrichtung 10 zum an- und abstellen an die Walze schwenkbar ist. Die Betätigungseinrichtung 10 sowie die Sprüheinrichtung sind mittels Leitstand steuerbar. Der Feuchtwerkswalzenzug 3 weist neben Feuchtauftragwalze 6 und Brückenwalze 5 einen mit einem separaten, drehzahlsteuerbaren Antrieb gekoppelten Feuchtduktor 7 auf, der in einen Feuchtmittelbehälter 9 eintaucht. Der Feuchtduktor 7 ist in Kontakt mit einer Dosierwalze 8. Die Brückenwalze 5 ist als Reiterwalze der Feuchtauftragswalze 6 zugeordnet.The printing unit essentially consists of an inking roller 4, a dampening roller 3, a plate cylinder 1 and a blanket cylinder 2. The inking roller 4 is assigned a spray device which can be operated with a vegetable cleaning agent and / or water. The plate cylinder 1 is assigned to the inking roller train 4, inking rollers 13 and a dampening roller roller 3 belonging to the dampening roller train 3 can be switched on and off. The dampening unit roller train 3 can be coupled to the inking unit roller train 4 via a bridge roller 5. Further components of the printing unit will not be discussed here.
As seen in the direction of rotation of the plate cylinder 1, a doctor device 11 is arranged on one of the last rollers of the inking unit roller train 4, which is received in a swivel joint and can be pivoted to the roller by means of an actuating device 10 for switching it on and off. The actuating device 10 and the spray device can be controlled by means of a control station. In addition to the dampening roller 6 and the bridge roller 5, the dampening unit roller train 3 has a dampening roller 7 which is coupled to a separate, speed-controllable drive and which is immersed in a dampening agent reservoir 9. The dampening roller 7 is in contact with a metering roller 8. The bridge roller 5 is assigned to the dampening roller 6 as a rider roller.

In einer weiteren Ausbildung kann die Feuchtauftragwalze eine zusätzliche Reiterwalze 12 tragen, die zur Brückenwalze 5 benachbart angeordnet ist. Für die Betriebsart

Figure imgb0001
Reinigen von Walzen" wird nachdem der Farbwerkswalzenzug 4 gereinigt wurde, die an der Feuchtauftragwalze 6 aufliegende Brückenwalze 5 mit dem Farbwerkswalzenzug 4 gekoppelt.In a further embodiment, the dampening roller can carry an additional rider roller 12 which is arranged adjacent to the bridge roller 5. For the operating mode
Figure imgb0001
Cleaning rollers "after the inking roller 4 has been cleaned, the bridge roller 5 resting on the dampening roller 6 is coupled to the inking roller 4.

Damit ist der Feuchtwerkswalzenzug 3 in den Farbwerkswalzenzug 4 integriert.
Der Antrieb des Feuchtduktors 7 wird aktiviert und der Feuchtduktor 7 wird bezogen auf einen im Druckbetrieb üblichen Wert zeitlich begrenzt mit überhöhter Umfangsgeschwindigkeit betrieben. Gleichzeitig wird die Maschinengeschwindigkeit des Druckwerkes auf eine definierte Drehzahl eingestellt, bei der die Umfangsgeschwindigkeiten der vom Plattenzylinder 1 angetriebenen Feuchtauftragwalze 6 zum Feuchtduktor 7 synchron sind. Es wurde gefunden, daß für das Reinigungsverfahren günstige synchrone Geschwindigkeiten in einem Bereich von 3000 bis 8000 Bogen pro Stunde erzielbar sind.
Die zum Feuchtduktor 7 benachbarten Dosierwalze 8 wird dabei mittels Friktion durch den Feuchtduktor 7 angetrieben. Ist der Feuchtwerkswalzenzug 3 mit einer zusätzlichen, auf der Feuchtauftragwalze 6 aufliegenden Reiterwalze 12 ausgebildet, so kann diese aus ihrer Position 12 in Richtung der Dosierwalze 8 verschwenkt werden derart, daß die Reiterwalze 12 dann die Position 12' einnimmt und mit der Feuchtauftragwalze 6 und der Dosierwalze 8 in Kontakt steht. Diese Walzenposition 12' erhöht die übertragbare Umfangskraft zusätzlich. Der Feuchtdoktor 7 wird dabei wie bereits beschrieben angetrieben.The dampening unit roller 3 is thus integrated into the inking unit roller 4.
The drive of the dampening duct 7 is activated and the dampening duct 7 is operated for a limited time at an excessive peripheral speed in relation to a value customary in printing operation. At the same time, the machine speed of the printing unit is set to a defined speed at which the peripheral speeds of the dampening roller 6 driven by the plate cylinder 1 are synchronized with the dampening roller 7. It has been found that, for the cleaning process, favorable synchronous speeds in a range from 3000 to 8000 sheets per hour can be achieved.
The metering roller 8 adjacent to the dampening roller 7 is driven by the damping roller 7 by means of friction. If the dampening roller 3 is designed with an additional rider roller 12 resting on the dampening roller 6, it can be pivoted from its position 12 in the direction of the metering roller 8 in such a way that the rider roller 12 then assumes the position 12 'and with the dampening roller 6 and Metering roller 8 is in contact. This roller position 12 'additionally increases the transferable peripheral force. The wet doctor 7 is driven as already described.

Gemäß Fig. 2 ist der Walzenzug eines Lackierwerkes gezeigt. Eine Auftragswalze 15 ist mit einem Formzylinder 14 in Kontakt. Neben der Auftragswalze 15 ist eine in einen Lackvorratsbehälter 19 eintauchende Duktorwalze 17 angeordnet und durch eine Übertragwalze 16 sind beide Walzen 15,17 gekoppelt. Die Duktorwalze 17 trägt in dieser Ausbildung eine Dosierwalze 18. Dem Walzenspalt, gebildet aus Übertragwalze 16 und Duktorwalze 17, ist ein Sprührohr für Reinigungsfluid zugeordnet (nicht gezeigt). Die Duktorwalze 17 ist mit einem separaten, drehzahlsteuerbaren Antrieb gekoppelt und die Auftragswalze 15 ist mit dem Antrieb des Formzylinders 14 formschlüssig in Eingriff Zum Reinigen der Lackiereinheit wird nach dem Aufsprühen von Reinigungsfluid die Duktorwalze 17 zeitlich begrenzt durch den Antrieb auf einen Drehzahlwert angetrieben, der über dem üblichen Produktionslackwert liegt. Gleichzeitig wird die Umfangsgeschwindigkeit der Auftragswalze 15 vom Formzylinder 14 derart gesteuert, daß Duktorwalze 17 und Auftragswalze 15 mit synchroner Umfangsgeschwindigkeit betreibbar sind.2, the roller train of a coating unit is shown. An application roller 15 is in contact with a forme cylinder 14. In addition to the applicator roller 15, a duct roller 17 immersing in a paint reservoir 19 is arranged, and both rollers 15, 17 are coupled by a transfer roller 16. In this embodiment, the doctor roller 17 carries a metering roller 18. A spray tube for cleaning fluid (not shown) is assigned to the roller gap, which is formed from the transfer roller 16 and the doctor roller 17. The duct roller 17 is coupled to a separate, speed-controllable drive and the application roller 15 engages in a form-fitting manner with the drive of the forme cylinder 14. To clean the coating unit, after spraying cleaning fluid, the duct roller 17 is driven for a limited time by the drive to a speed value which exceeds the usual production paint value. At the same time, the peripheral speed of the application roller 15 is controlled by the forme cylinder 14 in such a way that the duct roller 17 and the application roller 15 can be operated at a synchronous peripheral speed.

BezugszeichenaufstellungList of reference symbols

11
PlattenzylinderPlate cylinder
22nd
GummituchzylinderBlanket cylinder
33rd
FeuchtwerkswalzenzugDampening roller
44th
FarbwerkswalzenzugInking roller
55
BrückenwalzeBridge roller
66
FeuchtauftragwalzeDampening roller
77
FeuchtduktorwalzeDampening roller
88th
DosierwalzeDosing roller
99
FeuchmittelbehälterDampening agent tank
1010th
BetätigungseinrichtungActuator
1111
RakeleinrichtungDoctor device
1212th
ReiterwalzeRider roller
1313
FarbaufragwalzeInk roller
1414
FormzylinderForme cylinder
1515
AuftragswalzeApplicator roller
1616
ÜbertragwalzeTransfer roller
1717th
LackduktorPaint doctor
1818th
DosierwalzeDosing roller
1919th
LackvorratsbehälterPaint storage container

Claims (3)

Verfahren zur Reinigung von Zylindern und Walzen in einer Druckmaschine mit einem Farbwerkswalzenzug, dem eine Sprüheinrichtung und eine Rakeleinrichtung zugeordnet sind und einem wenigstens eine Feuchtauftrasgwalze und einen Feuchtduktor aufweisenden Feuchtwerkwalzenzug, der mittels einer schaltbaren Brückenwalze in den Farbwerkswalzenzug integriert wird,
dadurch gekennzeichnet,
daß bei aktivierter Sprüheinrichtung und Rakeleinrichtung der Feuchtduktor auf einen, bezogen auf einen im Druckbetrieb üblichen maximalen Produktionsfeuchtwert zeitlich begrenzt überhöht angetrieben wird und die Feuchtauftragwalze mit synchroner Umfangsgeschwindigkeit zur Umfangsgeschwindigkeit des Feuchtduktors vom Plattenzylinder angetrieben wird, wobei weitere Walzen des Feuchtwerkswalzenzuges mit Friktion betrieben werden.Process for cleaning cylinders and rollers in a printing press with an inking unit roller to which a spraying device and a doctor blade device are assigned and a dampening unit roller having at least one dampening applicator roller and one dampening roller, which is integrated into the inking unit roller unit by means of a switchable bridge roller,
characterized,
that when the spraying device and doctor blade device are activated, the dampening roller is driven to an excessively high level, based on a maximum production dampening value common in printing operation, and the dampening roller is driven by the plate cylinder at a synchronous peripheral speed to the peripheral speed of the dampening roller, with further rollers of the dampening roller roller being operated with friction. Verfahren nach Anspruch 1,
dadurch gekennzeichnet,
daß eine zur Feuchtauftragswalze reibsschlüssig angeordnete Reiterwalze mit einer dem Feuchtduktor zugeordneten Dosierwalze in Reibkontakt gebracht wird.Method according to claim 1,
characterized,
that a rider roller arranged frictionally to the dampening roller is brought into frictional contact with a metering roller assigned to the dampening roller. Verfahren zur Reinigung von Zylindern und Walzen eines Lackierwerkes einer Druckrmaschine mit wenigstens einer Auftragwalze und einer in einen Lackvvorratsbehälter eintauchenden Duktorwalze, wobei die Duktorwalze mit einem separaten Antrieb getriebetechnisch gekoppelt wird,
dadurch gekennzeichnet,
daß bei aktivierter Sprüheinrichtung die Duktorwalze auf einen, bezogen im Druckbetrieb üblichen maximalen Produktionslackwert zeitlich begrenzt überhöht angetrieben wird und die Auftragwalze mit synchroner Umfangsgeschwindigkeit zur Umfangsgeschwindigkeit der Duktorwalze vom Formzylinder angetrieben wird, wobei weitere lackführende Walzen mit Friktion betrieben werden.Process for cleaning cylinders and rollers of a coating unit of a printing machine with at least one applicator roller and a duct roller that is immersed in a lacquer reservoir, the duct roller being coupled with a separate drive in terms of transmission technology,
characterized,
that when the spraying device is activated, the duct roller is driven for a limited period of time to a maximum production varnish value, which is common in printing operations, and the applicator roller is driven by the forme cylinder at a synchronous peripheral speed to the peripheral speed of the duct roller, with further coating rollers being operated with friction.
EP97117937A 1996-11-02 1997-10-16 Method for cleaning cylinders and rollers in a printing machine Expired - Lifetime EP0839652B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19645169 1996-11-02
DE19645169A DE19645169C2 (en) 1996-11-02 1996-11-02 Process for cleaning cylinders and rollers in a printing press

Publications (3)

Publication Number Publication Date
EP0839652A2 true EP0839652A2 (en) 1998-05-06
EP0839652A3 EP0839652A3 (en) 1998-12-02
EP0839652B1 EP0839652B1 (en) 2001-04-04

Family

ID=7810449

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97117937A Expired - Lifetime EP0839652B1 (en) 1996-11-02 1997-10-16 Method for cleaning cylinders and rollers in a printing machine

Country Status (2)

Country Link
EP (1) EP0839652B1 (en)
DE (2) DE19645169C2 (en)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
US7373882B2 (en) 2004-12-21 2008-05-20 Heidelberger Druckmaschinen Ag Method for washing an anilox inking unit of a printing press

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004031946B4 (en) * 2004-06-30 2021-03-18 Heidelberger Druckmaschinen Ag Method for driving rollers of a printing unit of a printing machine
DE102007004217A1 (en) 2007-01-27 2008-07-31 Man Roland Druckmaschinen Ag Method for cleaning of cylinders and rollers in offset printing machine, involves moving away dampening solution case from operating position for printing operation, in which dampening ductor is dipped in dampening solution

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US4369734A (en) * 1980-03-17 1983-01-25 M.A.N.-Roland Druckmaschinen Aktiengesellschaft Varnishing assembly in a printing press having self-cleaning feature
DE3507210A1 (en) * 1985-03-01 1986-09-04 Heidelberger Druckmaschinen Ag, 6900 Heidelberg WASHING DEVICE FOR THE RUBBER SCARF ON OFFSET ROTATION PRINTING MACHINES
DE3620156A1 (en) * 1985-06-25 1987-01-08 Polygraph Leipzig METHOD AND DEVICE FOR ELIMINATING PLASTERS ON THE PRINT PLATE
DE3638469A1 (en) * 1986-04-01 1987-10-08 Polygraph Leipzig Method and apparatus for driving a varnishing device
DE3832527A1 (en) * 1987-09-29 1989-04-13 Jpe Kk Damping system for an offset printing machine
EP0673770A1 (en) * 1994-03-24 1995-09-27 MAN Roland Druckmaschinen AG Method and means for removing hickies from the printing plate in a printing machine
DE19501806A1 (en) * 1995-01-21 1996-07-25 Roland Man Druckmasch Process for cleaning cylinders and rollers of a printing unit of a printing press

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DE4011039C2 (en) * 1990-04-05 1996-03-14 Roland Man Druckmasch Process for moistening and inking a plate cylinder of a multi-color offset sheet-fed rotary printing press

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4369734A (en) * 1980-03-17 1983-01-25 M.A.N.-Roland Druckmaschinen Aktiengesellschaft Varnishing assembly in a printing press having self-cleaning feature
DE3507210A1 (en) * 1985-03-01 1986-09-04 Heidelberger Druckmaschinen Ag, 6900 Heidelberg WASHING DEVICE FOR THE RUBBER SCARF ON OFFSET ROTATION PRINTING MACHINES
DE3620156A1 (en) * 1985-06-25 1987-01-08 Polygraph Leipzig METHOD AND DEVICE FOR ELIMINATING PLASTERS ON THE PRINT PLATE
DE3638469A1 (en) * 1986-04-01 1987-10-08 Polygraph Leipzig Method and apparatus for driving a varnishing device
DE3832527A1 (en) * 1987-09-29 1989-04-13 Jpe Kk Damping system for an offset printing machine
EP0673770A1 (en) * 1994-03-24 1995-09-27 MAN Roland Druckmaschinen AG Method and means for removing hickies from the printing plate in a printing machine
DE19501806A1 (en) * 1995-01-21 1996-07-25 Roland Man Druckmasch Process for cleaning cylinders and rollers of a printing unit of a printing press

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7373882B2 (en) 2004-12-21 2008-05-20 Heidelberger Druckmaschinen Ag Method for washing an anilox inking unit of a printing press

Also Published As

Publication number Publication date
EP0839652B1 (en) 2001-04-04
DE19645169C2 (en) 2000-02-03
DE59703283D1 (en) 2001-05-10
EP0839652A3 (en) 1998-12-02
DE19645169A1 (en) 1998-05-14

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