EP0453853B1 - Printing machine with washing device - Google Patents

Printing machine with washing device Download PDF

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Publication number
EP0453853B1
EP0453853B1 EP91105538A EP91105538A EP0453853B1 EP 0453853 B1 EP0453853 B1 EP 0453853B1 EP 91105538 A EP91105538 A EP 91105538A EP 91105538 A EP91105538 A EP 91105538A EP 0453853 B1 EP0453853 B1 EP 0453853B1
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EP
European Patent Office
Prior art keywords
cylinder
roller
unit
printing
rollers
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.)
Expired - Lifetime
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EP91105538A
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German (de)
French (fr)
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EP0453853A3 (en
EP0453853A2 (en
Inventor
Anton Rodi
Bernd Müller
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Heidelberger Druckmaschinen AG
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Heidelberger Druckmaschinen AG
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Publication of EP0453853A2 publication Critical patent/EP0453853A2/en
Publication of EP0453853A3 publication Critical patent/EP0453853A3/en
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Publication of EP0453853B1 publication Critical patent/EP0453853B1/en
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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 printing press, in particular an offset printing press, the printing unit of which has a plate, a blanket and a printing cylinder as well as an inking and dampening unit provided with ink and dampening application rollers and with a washing device which is in the washing operating position from a control device to the blanket cylinder is employed.
  • washing devices for cleaning the rollers or cylinders of an offset printing machine.
  • a washing device is to be used to clean the blanket cylinder.
  • a separate printing cylinder washing device is provided for cleaning the printing cylinder.
  • the plate cylinder is cleaned using the inking rollers.
  • the dampening unit can also be cleaned using the inking rollers, provided that an intermediate roller can be used to connect the inking unit and dampening unit.
  • the invention is therefore based on the object of creating a printing press of the type mentioned at the outset in which the outlay on equipment for washing operation is relatively low. Furthermore, simple handling should be provided.
  • both the blanket cylinder and the impression cylinder can be cleaned with only one washing device, provided the blanket cylinder and impression cylinder are in contact with one another. Since only slight contamination of the printing cylinder is to be expected in the production printing process, because the printing material is between it and the blanket cylinder, usually only the edges of the printing cylinder that are free of printing material take on color, so that it is not always necessary when washing the blanket of the blanket cylinder, also to clean the impression cylinder at the same time.
  • the distance between the blanket cylinder and impression cylinder is brought about. This can be achieved in a surprising manner with a device which is intended for a completely different operating mode. It is a so-called Provision of printing, which is used in production printing to compensate for the substrate thickness, that is, the distance between the blanket cylinder and the impression cylinder is set depending on the thickness of the substrate (eg paper thickness). If, during washing operation, the distance between the cylinders mentioned is reduced to zero by means of the pressure provided, the blanket washing device not only cleans the blanket of the blanket cylinder, but also the printing cylinder.
  • the pressure supply preferably has a remotely controllable, in particular electrical, drive.
  • the adjustment can then be carried out from the control panel of the printing press by pressing a button or the like, or can be carried out by a computer-controlled machine control.
  • the control device shifts the blanket cylinder and plate cylinder into a contact position so that the washing liquid can also pass from the blanket cylinder onto the plate cylinder.
  • a simultaneous cleaning of the blanket cylinder and plate cylinder is possible when the printing cylinder is switched off, that is to say in the spaced position.
  • the washing operation to be carried out with only one washing device, namely the blanket cylinder washing device mentioned, can also be extended to the dampening unit by the control device shifting the dampening application roller into contact position with the plate cylinder.
  • the washing liquid can then get from the blanket cylinder to the plate cylinder and from there via the dampening roller into the dampening unit.
  • Color residues can be washed out very well in this way and / or gum residues, as they remain in the dampening unit, are cleaned, provided the rubber coating is transferred via the dampening unit to the pressure plate of the plate cylinder.
  • the control device separates a dampening solution supply device from rollers of the dampening unit leading to the plate cylinder.
  • the separation point is preferably made between the dampening roller and a metering roller, which works together with an immersion roller of the dampening unit.
  • the dipping roller protrudes with part of its circumference into the a dampening solution box.
  • the control device connects the inking and dampening unit to one another via an intermediate roller, so that rollers of the inking unit can be washed with washing liquid supplied by the dampening unit.
  • the washing liquid coming from the blanket cylinder washing device can therefore reach the inking unit via the plate cylinder, the dampening application roller and the intermediate roller and clean the corresponding rollers there.
  • the control device switches off a ink delivery device from rollers of the inking unit leading to the plate cylinder.
  • the separation point can take place, for example, between a lifter roller and a roller interacting with it.
  • the lifter roller can periodically interact with an ink duct of the ink fountain of the printing press.
  • control device for washing the rollers of the inking unit turns the inking rollers on the plate cylinder.
  • the washing liquid is supplied to the inking unit in a shorter way via the inking rollers which interact with the plate cylinder.
  • the dampening unit can also be washed with the intermediate roller. It is also possible to use ink and dampening rollers on the plate cylinder for cleaning. It is possible to couple or decouple the inking and dampening units by means of the intermediate roller.
  • the invention further relates to a method for cleaning cylinders and rollers of a printing unit of a printing machine, in particular offset printing machine, the printing unit having a plate, a blanket and a printing cylinder and an inking and dampening unit provided with inking and dampening application rollers, and that is also provided with a washing device which is placed on the blanket cylinder for the washing process, and wherein in the washing operation the printing cylinder (37) is displaced from a printing supply which serves to compensate for the printing substrate thickness in the spacing or contact position to the blanket cylinder (36).
  • the relative position of the blanket cylinder and plate cylinder and / or plate cylinder and dampening roller and / or plate cylinder and inking roller (s) and / or an intermediate roller and the dampening roller or an associated inking roller is also freely controllable, depending on the control state, cleaning or preventing cleaning of the corresponding parts can be carried out from only one washing device.
  • the free controllability of the printing cylinder is carried out by means of a pressure supply which serves to compensate for the substrate thickness in continuous printing operation.
  • the provision of printing which is intended to serve a completely different purpose, is therefore used anew according to the invention in that it is used not in the printing process but in the washing process. Due to their adjustability, which can preferably be carried out remotely by means of a drive, both a contact position of the blanket cylinder and impression cylinder and a spacing position of these cylinders can be achieved. In this respect, the printing cylinder is either washed or not.
  • a dosing roller of the dampening unit interacting with a dampening solution immersion roller is switched off by the dampening application roller during the washing process, it is ensured that no washing liquid can penetrate into the dampening solution delivery device of the printing press.
  • the inking unit that is to say that during the washing process a jack roller of the inking unit interacting with an inking roller is switched off by an inking unit roller leading to the inking rollers, so that the penetration of washing liquid into the ink delivery device is prevented.
  • FIG. 1 shows a roller diagram of an offset printing machine, not shown in detail.
  • the roller diagram has an inking unit 1 and a dampening unit 2.
  • the inking unit 1 is provided with an ink fountain 3 which (not shown) has metering elements for setting zonal ink gaps. From the ink fountain 3, an ink fountain pen 4 doses ink during operation.
  • a pivotable lifting roller 5 interacts with the ink duct 4 and a driven distribution cylinder 6.
  • the dampening unit 2 has a dampening solution box 26 filled with dampening solution 27, wherein an immersion roller 28 with a partial section of its circumference is immersed in the dampening solution 27.
  • the dipping roller 28 interacts with a metering roller 29.
  • a rubber roller 30 is also provided.
  • Inking and dampening units 1, 2 also have further, driven cylinders 7, 8, 9 and 10. Furthermore, six rider and transfer rollers 11 to 16 and nine rubber rollers 17 to 25 are provided. An intermediate roller 31 can be used to couple the inking and dampening units 1, 2 by the intermediate roller 31 coming into contact with the rollers 30 and 18.
  • both ink and fountain solution can be supplied to a printing form 32.
  • the printing form 32 is a printing plate (not shown) mounted on a plate cylinder 33.
  • the transfer of ink and dampening solution from the inking unit 1 or dampening unit 2 for the printing plate is carried out by the rubber rollers 18, 20, 23, 25 and 30.
  • the rubber rollers 18, 20, 23 and 25 are therefore also referred to as the ink-transferring inking rollers 34 and the rubber roller 30 —in relation to the dampening solution 27 — as the dampening roller 35.
  • a blanket cylinder 36 and impression cylinder 37 are also provided.
  • the blanket cylinder 36 is associated with a washing device 38, which can be adjusted by means of a control device, not shown, in the contact position against the lateral surface, that is, against the blanket of the blanket cylinder 36.
  • the washing device 38 has two washing rollers 39 and a common roller 40 connecting the washing rollers 39.
  • a transfer roller 41 is provided which is in contact with the upper washing roller 39 and which can be supplied with washing liquid 43 by means of a spray device 42 or the like.
  • a doctor device 44 is associated with the roller 40, under which a collecting trough 45 is arranged.
  • the distance between the blanket cylinder 36 and the printing cylinder 37 can be set.
  • the setting is made according to the thickness of the printing material used (eg paper).
  • the pressure supply in the washing operation of the offset printing press is used to either a position of To produce blanket cylinder 36 and impression cylinder 37 or a spacing of these cylinders. There is therefore free controllability, with a device (pressure supply) known per se for a completely different operating mode being used in a new way according to the invention.
  • the control device already mentioned also allows free control of the individual rollers or cylinders of the offset printing press, so that a separate displacement of the blanket cylinder 36 and / or the plate cylinder 33 and / or the inking rollers 34 and / or the dampening roller 35 and / or the Metering roller 29 and / or the lifting roller 5 and / or the intermediate roller 31 is possible.
  • This free controllability also exists with regard to the pressure cylinder 37, either by means of the pressure supply or by means of a separate device for cylinder displacement.
  • washing operating modes can be carried out with the rollers or cylinders of a printing unit of the offset printing press shown in FIGS. 1 to 7:
  • the plate cylinder 33 and impression cylinder 37 are at a distance from the blanket cylinder 36, so that the washing device 38, which interacts with the outer surface of the blanket cylinder 36, only cleans the blanket stretched onto the blanket cylinder 36.
  • the printing cylinder 37 assumes a spacing position from the blanket cylinder 36 on account of a corresponding setting of the pressure supply.
  • the washing rollers 39 of the washing device 38 rest on the outer surface of the blanket cylinder 36. Furthermore, there is contact between the blanket cylinder 36 and the plate cylinder 33. In this respect, blanket cylinder 36 and plate cylinder 33, that is, the blanket and the printing plate are cleaned at the same time.
  • FIG. 3 shows a position of the individual cylinders or rollers in which both the blanket cylinder 36 and the plate cylinder 33 and the rollers of the dampening unit 2 are cleaned.
  • blanket cylinder 36 and plate cylinder 33 take up a contact position.
  • the dampening roller 35 bears against the outer surface of the plate cylinder 33.
  • the distribution cylinder 10 and the intermediate roller 31 are set against the dampening roller 35.
  • the inking rollers 34 are spaced from the plate cylinder 33.
  • the Washer 38 delivered washing liquid to the blanket cylinder 36 and from there via the plate cylinder 33 to the dampening roller 35, the intermediate roller 31 and the distribution cylinder 10. All the cylinders or rollers mentioned that are in contact with one another are therefore cleaned.
  • the metering roller 29 is displaced by the control device in such a way that it assumes a spaced position from the dampening application roller 35. On the other hand, this also prevents dampening solution 27 from being supplied to the dampening roller 35 and watering down the washing liquid.
  • FIG. 4 shows a position of the roller arrangement in which the washing device 38 interacts with the blanket cylinder 36, which has a spacing position from the printing cylinder 37 and an abutment position from the plate cylinder 33.
  • the inking rollers 34 are set against the plate cylinder 33, the dampening roller 35 is at a distance from the plate cylinder 33 and the intermediate roller 31 is in contact with the dampening roller 35 and at a distance from the first inking roller 34 (so-called small separation).
  • the washing liquid therefore gets over the blanket cylinder 36 to the plate cylinder 33 and from there via the inking rollers 34 to the corresponding rollers and cylinders of the inking unit 1, so that these parts are cleaned.
  • the lifting roller 5 assumes a separation position from the distribution cylinder 6 by means of the control device mentioned.
  • the pressure cylinder 37 is located by means of the pressure supply in a spaced position from the blanket cylinder 36, so that it is not also cleaned.
  • a completely different path is followed here, in that the plate cylinder 33 and from there the inking unit 1 are cleaned, starting from the blanket cylinder 36.
  • FIG. 5 Another position of the roller diagram is shown in FIG. 5.
  • the washing device 38 is in contact with the outer surface of the blanket cylinder 36.
  • the impression cylinder 37 and blanket cylinder 36 assume a spacing position by means of the pressure provided.
  • a blanket cylinder 36 and plate cylinder 33 as well as the inking rollers 34 and the dampening roller 35 form a plate cylinder 33.
  • the inking and dampening units 1, 2 are coupled to one another by means of the intermediate roller 31.
  • the one described Roller or cylinder position enables extensive cleaning of inking and dampening units 1, 2 as well as plate cylinder 33 and blanket cylinder 36. If cleaning of the printing cylinder 37 is also desired, the pressure supply can be adjusted such that the printing cylinder 37 is in contact with the blanket cylinder 36 occurs, whereby the washing liquid also wets the outer surface of the pressure cylinder 37.
  • FIG. 6 shows a roller position in which the inking and dampening units 1, 2 are coupled to one another via the intermediate roller 31 and the dampening roller 35 is in contact with the plate cylinder 33. Furthermore, blanket cylinder 36 and plate cylinder 33 are in contact with each other. The washing device 38 interacts with the blanket cylinder 36. The dampening solution delivery device 46 and the ink delivery device 47 are separated from the other components of the inking and dampening unit 1, 2. This cleans both the blanket cylinder 36 and the plate cylinder 33 and, via the contact of the latter with the dampening application roller 35, the dampening unit 2 and, via the intermediate roller 31, the inking unit 1.
  • FIG. 7 shows a roller or cylinder position in which the dampening unit 2 is cleaned via the inking unit 1.
  • blanket cylinders 36 and plate cylinders 33 are in the contact position.
  • the inking rollers 34 are placed on the outer surface of the plate cylinder 33.
  • the first inking roller 34 with the dampening roller 35 is above the intermediate roller 31 coupled, but which is not in contact with the plate cylinder 33.
  • Dampening agent delivery device 46 and ink delivery device 47 are separated from the metering roller 29 and lifting roller 5 by appropriate positions.
  • the washing liquid passes from the washing device 38 to the blanket cylinder 36 and from there to the plate cylinder 33.
  • the latter transfers part of the washing liquid to the inking unit 1 by means of the inking rollers 34. From there, the washing liquid reaches the dampening roller 35 and the distribution cylinder 10 via the intermediate roller 31.
  • the printing cylinder 37 has a spacing position by means of the pressure supply to the blanket cylinder 36 or - by corresponding adjustment of the printing supply - assumes a contact position with the blanket cylinder 36 so that it also cleans becomes.
  • FIG. 8 shows a roller or cylinder position, in which the blanket cylinder 36 assumes an abutment position with the printing cylinder 37, so that these two cylinders are cleaned with the washing device 38.
  • the system position is achieved by a corresponding setting of the pressure supply.

Abstract

A method of washing an offset printing press having a plate cylinder, a rubber blanket cylinder, an impression cylinder, an inking unit a paper thickness compensator and a damping unit. The inking unit and the damping unit include, respectively, inking rollers and damping solution applicator rollers. The offset printing press also includes a washing apparatus. The washing apparatus, when in the wash mode, is placed in engagement with the rubber blanket cylinder of the printing press by control apparatus. Also, in the wash mode, the impression cylinder is engaged with or disengaged from the rubber blanket cylinder by a paper thickness compensator. The usual purpose of the paper thickness compensator is to compensate for the thickness of the stock in running-on mode but is employed herein also to effectuate washing of various rollers and/or cylinders of the printing press.

Description

Die Erfindung betrifft eine Druckmaschine, insbesondere Offset-Druckmaschine, deren Druckwerk einen Platten-, einen Gummituch- und einen Druckzylinder sowie ein mit Farb- und Feuchtauftragwalzen versehenes Farb- und Feuchtwerk aufweist und mit einer Wascheinrichtung, die in Waschbetriebsstellung von einer Steuereinrichtung an den Gummituchzylinder angestellt wird.The invention relates to a printing press, in particular an offset printing press, the printing unit of which has a plate, a blanket and a printing cylinder as well as an inking and dampening unit provided with ink and dampening application rollers and with a washing device which is in the washing operating position from a control device to the blanket cylinder is employed.

Für die Reinigung von Walzen bzw. Zylinder einer Offset-Druckmaschine ist es bekannt, Wascheinrichtungen einzusetzen. So ist nach einer bekannten Bauform vorgesehen, zur Reinigung des Gummituchzylinders an diesen eine Wascheinrichtung anzustellen. Zur Reinigung des Druckzylinders ist eine separate Druckzylinder-Wascheinrichtung vorgesehen. Die Reinigung des Plattenzylinders erfolgt über die Farbwalzen. Eine Reinigung des Feuchtwerks ist ebenfalls über die Farbwalzen möglich, sofern mittels einer Zwischenwalze eine Verbindung zwischen Farb- und Feuchtwerk hergestellt werden kann.It is known to use washing devices for cleaning the rollers or cylinders of an offset printing machine. For example, according to a known design, a washing device is to be used to clean the blanket cylinder. A separate printing cylinder washing device is provided for cleaning the printing cylinder. The plate cylinder is cleaned using the inking rollers. The dampening unit can also be cleaned using the inking rollers, provided that an intermediate roller can be used to connect the inking unit and dampening unit.

Die bekannten Ausführungen haben den Nachteil, daß die verschiedenen Einrichtungen hohe Kosten mit sich bringen, sowie einen großen Platzbedarf benötigen. Ferner erfordert der Betrieb der verschiedenen Einrichtungen einen entsprechend großen Zeitaufwand.The known designs have the disadvantage that the various devices entail high costs and require a large amount of space. Furthermore, the operation of the various facilities requires a correspondingly large amount of time.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Druckmaschine der eingangs genannten Art zu schaffen, bei der der apparative Aufwand für den Waschbetrieb relativ gering ist. Ferner soll eine einfache Handhabung gegeben sein.The invention is therefore based on the object of creating a printing press of the type mentioned at the outset in which the outlay on equipment for washing operation is relatively low. Furthermore, simple handling should be provided.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß im Waschbetrieb der Druckzylinder von einer im Fortdruckbetrieb an sich dem Bedruckstoffdickenausgleich (z.B. Papierdickenausgleich) dienenden Druckbeistellung in Abstands- oder Anlagestellung zum Gummituchzylinder verlagert wird. Mithin läßt sich sowohl der Gummituchzylinder als auch der Druckzylinder mit nur einer Wascheinrichtung reinigen, sofern Gummituchzylinder und Druckzylinder eine Anlagestellung zueinander einnehmen. Da im Fortdruckprozeß nur mit geringfügiger Verunreinigung des Druckzylinders zu rechnen ist, weil sich zwischen ihm und dem Gummituchzylinder der Bedruckstoff befindet, nehmen zumeist nur die bedruckstofffreien Ränder des Druckzylinders Farbe an, so daß es bei dem Waschen des Gummituchs des Gummituchzylinders nicht immer erforderlich, auch gleichzeitig den Druckzylinder zu reinigen. Um diese Mitreinigung auszuschließen, wird die Abstandsstellung zwischen Gummituchzylinder und Druckzylinder herbeigeführt. Diese läßt sich in überraschender Weise mit einer Einrichtung erzielen, die an sich für eine ganz andere Betriebsart vorgesehen ist. Es handelt sich dabei um eine sogenannte Druckbeistellung, die im Fortdruckbetrieb dazu dient, einen Bedruckstoffdickenausgleich vorzunehmen, das heißt, es wird in Abhängigkeit von der Dicke des Bedruckstoffs (z.B. Papierdicke) der Abstand zwischen dem Gummituchzylinder und dem Druckzylinder eingestellt. Wird nun beim Waschbetrieb der Abstand zwischen den genannten Zylindern bis auf Null mittels der Druckbeistellung reduziert, so erfolgt mit der Gummituch-Wascheinrichtung nicht nur die Reinigung des Gummituchs des Gummituchzylinders sondern auch ein Waschen des Druckzylinders. Andererseits ist es möglich, die Druckbeistellung innerhalb ihres Verstellbereichs derart weit zu verstellen, daß der Gummituchzylinder und der Druckzylinder einen Abstand zueinander einnehmen, so daß im Waschbetrieb keine Waschflüssigkeit auf den Druckzylinder übertritt; mithin nur der Gummituchzylinder gewaschen wird. Mit nur einer Wascheinrichtung, die nur einen geringen Platzbedarf benötigt und einfach zu handhaben ist, lassen sich somit unterschiedliche Zylinder der Druckmaschine reinigen, wobei eine an sich bekannte Maschinenkomponente (nämlich die Druckbeistellung) auf völlig neue Art und Weise verwendet und eingesetzt wird. Insofern läßt sich der beschriebene Waschvorgang ohne konstruktive Änderungen bekannter Druckmaschinen durchführen.This object is achieved in that, in the washing operation, the printing cylinder is displaced from a printing supply in the printing or printing position itself (for example, paper thickness compensation) in the spacing or contact position to the blanket cylinder. Thus, both the blanket cylinder and the impression cylinder can be cleaned with only one washing device, provided the blanket cylinder and impression cylinder are in contact with one another. Since only slight contamination of the printing cylinder is to be expected in the production printing process, because the printing material is between it and the blanket cylinder, usually only the edges of the printing cylinder that are free of printing material take on color, so that it is not always necessary when washing the blanket of the blanket cylinder, also to clean the impression cylinder at the same time. In order to exclude this co-cleaning, the distance between the blanket cylinder and impression cylinder is brought about. This can be achieved in a surprising manner with a device which is intended for a completely different operating mode. It is a so-called Provision of printing, which is used in production printing to compensate for the substrate thickness, that is, the distance between the blanket cylinder and the impression cylinder is set depending on the thickness of the substrate (eg paper thickness). If, during washing operation, the distance between the cylinders mentioned is reduced to zero by means of the pressure provided, the blanket washing device not only cleans the blanket of the blanket cylinder, but also the printing cylinder. On the other hand, it is possible to adjust the pressure supply within its adjustment range to such an extent that the blanket cylinder and the printing cylinder are at a distance from one another, so that no washing liquid passes onto the printing cylinder in the washing operation; therefore only the blanket cylinder is washed. With just one washing device, which requires only a small amount of space and is easy to handle, different cylinders of the printing press can thus be cleaned, a known machine component (namely the provision of printing) being used and used in a completely new way. In this respect, the washing process described can be carried out without design changes to known printing presses.

Bevorzugt weist die Druckbeistellung einen fernsteuerbaren, insbesondere elektrischen Antrieb auf. Die Verstellung kann dann vom Bedienpult der Druckmaschine aus durch Tastendruck oder dergleichen erfolgen oder von einer rechnergesteuerten Maschinensteuerung durchgeführt werden.The pressure supply preferably has a remotely controllable, in particular electrical, drive. The adjustment can then be carried out from the control panel of the printing press by pressing a button or the like, or can be carried out by a computer-controlled machine control.

Um auch den Plattenzylinder der Druckmaschine mitreinigen zu können, verlagert die Steuereinrichtung Gummituchzylinder und Plattenzylinder in eine Anlagestellung, so daß die Waschflüssigkeit vom Gummituchzylinder auch auf den Plattenzylinder übertreten kann. Insofern ist bei abgestelltem, das heißt, sich in Abstandsstellung befindlichem Druckzylinder eine gleichzeitige Reinigung von Gummituchzylinder und Plattenzylinder möglich.In order to be able to also clean the plate cylinder of the printing machine, the control device shifts the blanket cylinder and plate cylinder into a contact position so that the washing liquid can also pass from the blanket cylinder onto the plate cylinder. In this respect, a simultaneous cleaning of the blanket cylinder and plate cylinder is possible when the printing cylinder is switched off, that is to say in the spaced position.

Der mit nur einer Wascheinrichtung, nämlich der erwähnten Gummituchzylinder-Wascheinrichtung vorzunehmende Waschbetrieb kann auch auf das Feuchtwerk ausgedehnt werden, indem die Steuereinrichtung die Feuchtauftragswalze in Anlagestellung zum Plattenzylinder verlagert. Die Waschflüssigkeit kann dann vom Gummituchzylinder zum Plattenzylinder und von dort über die Feuchtauftragswalze in das Feuchtwerk gelangen. Farbreste lassen sich auf diese Art und Weise sehr gut auswaschen und/oder es erfolgt eine Reinigung von Gummierungsresten, wie sie im Feuchtwerk verbleiben, sofern die Gummierung über das Feuchtwerk auf die Druckplatte des Plattenzylinders übertragen wird.The washing operation to be carried out with only one washing device, namely the blanket cylinder washing device mentioned, can also be extended to the dampening unit by the control device shifting the dampening application roller into contact position with the plate cylinder. The washing liquid can then get from the blanket cylinder to the plate cylinder and from there via the dampening roller into the dampening unit. Color residues can be washed out very well in this way and / or gum residues, as they remain in the dampening unit, are cleaned, provided the rubber coating is transferred via the dampening unit to the pressure plate of the plate cylinder.

Um zu verhindern, daß keine Waschflüssigkeit in das Feuchtmittelreservoir der Druckmaschine eindringt, trennt die Steuereinrichtung eine Feuchtmittelliefereinrichtung von zum Plattenzylinder führenden Walzen des Feuchtwerks. Vorzugsweise wird die Trennstelle zwischen der Feuchtauftragswalze und einer Dosierwalze vorgenommen, die mit einer Tauchwalze des Feuchtwerks zusammenarbeitet. Die Tauchwalze ragt mit einem Teil ihres Umfangs in das in einem Feuchtmittelkasten vorhandene Feuchtmittel ein.In order to prevent washing liquid from entering the dampening solution reservoir of the printing press, the control device separates a dampening solution supply device from rollers of the dampening unit leading to the plate cylinder. The separation point is preferably made between the dampening roller and a metering roller, which works together with an immersion roller of the dampening unit. The dipping roller protrudes with part of its circumference into the a dampening solution box.

Ferner ist es bevorzugt möglich, daß die Steuereinrichtung das Farb- und Feuchtwerk über eine Zwischenwalze miteinander verbindet, so daß mit vom Feuchtwerk gelieferter Waschflüssigkeit Walzen des Farbwerks gewaschen werden können. Die von der Gummituchzylinder-Wascheinrichtung kommende Waschflüssigkeit kann daher über den Plattenzylinder, die Feuchtauftragwalze und die Zwischenwalze bis in das Farbwerk gelangen und dort die entsprechenden Walzen reinigen. Um sicherzustellen, daß keine Waschflüssigkeit in das Farbreservoir der Druckmaschine gelangt, stellt die Steuereinrichtung eine Farbliefereinrichtung von zum Plattenzylinder führenden Walzen des Farbwerks ab. Die Trennstelle kann beispielsweise zwischen einer Heberwalze und einer mit dieser zusammenwirkenden Walze erfolgen. Die Heberwalze kann periodisch mit einem Farbduktor des Farbkastens der Druckmaschine zusammenwirken.Furthermore, it is preferably possible for the control device to connect the inking and dampening unit to one another via an intermediate roller, so that rollers of the inking unit can be washed with washing liquid supplied by the dampening unit. The washing liquid coming from the blanket cylinder washing device can therefore reach the inking unit via the plate cylinder, the dampening application roller and the intermediate roller and clean the corresponding rollers there. In order to ensure that no washing liquid gets into the ink reservoir of the printing press, the control device switches off a ink delivery device from rollers of the inking unit leading to the plate cylinder. The separation point can take place, for example, between a lifter roller and a roller interacting with it. The lifter roller can periodically interact with an ink duct of the ink fountain of the printing press.

Es ist jedoch auch möglich, daß die Steuereinrichtung zum Waschen der Walzen des Farbwerks die Farbauftragwalzen an den Plattenzylinder anstellt. Insofern wird -auf kürzerem Wege- dem Farbwerk die Waschflüssigkeit über die mit dem Plattenzylinder zusammenwirkenden Farbauftragwalzen zugeführt. Mit der Zwischenwalze kann dann auch das Feuchtwerk mitgewaschen werden. Ferner ist es auch möglich, Farb- und Feuchtauftragwalzen an den Plattenzylinder für die Reinigung anzustellen. Dabei ist eine Kopplung oder Entkopplung von Farb- und Feuchtwerk mittels der Zwischenwalze möglich.However, it is also possible that the control device for washing the rollers of the inking unit turns the inking rollers on the plate cylinder. In this respect, the washing liquid is supplied to the inking unit in a shorter way via the inking rollers which interact with the plate cylinder. The dampening unit can also be washed with the intermediate roller. It is also possible to use ink and dampening rollers on the plate cylinder for cleaning. It is possible to couple or decouple the inking and dampening units by means of the intermediate roller.

Die Erfindung betrifft ferner ein Verfahren zur Reinigung von Zylindern und Walzen eines Druckwerks einer Druckmaschine, insbesondere Offset-Druckmaschine, wobei das Druckwerk einen Platten-, einen Gummituch- und einen Druckzylinder sowie ein mit Farb- und feuchtauftragwalzen versehenes Farb- und Feuchtwerk aufweist und das ferner mit einer Wascheinrichtung versehen ist, die für den Waschvorgang an den Gummituchzylinder angestellt wird, und wobei im Waschbetrieb der Druckzylinder (37) von einer im Fortdruckbetrieb an sich dem Bedruckstoffdickenausgleich dienenden Druckbeistellung in Abstands- oder Anlagestellung zum Gummituchzylinder (36) verlagert wird.The invention further relates to a method for cleaning cylinders and rollers of a printing unit of a printing machine, in particular offset printing machine, the printing unit having a plate, a blanket and a printing cylinder and an inking and dampening unit provided with inking and dampening application rollers, and that is also provided with a washing device which is placed on the blanket cylinder for the washing process, and wherein in the washing operation the printing cylinder (37) is displaced from a printing supply which serves to compensate for the printing substrate thickness in the spacing or contact position to the blanket cylinder (36).

Aus der deutschen Patentschrift 25 31 886 geht ein Verfahren zur Reinigung von Zylindern eines Offset-Druckwerks hervor, bei dem nach der Inbetriebnahme einer Gummituchzylinder-Wascheinrichtung der Gummituchzylinder an den Druckzylinder angestellt wird, so daß dieser mitgereinigt wird.From the German patent 25 31 886 a method for cleaning cylinders of an offset printing unit emerges, in which after the start-up of a blanket cylinder washing device, the blanket cylinder is turned on the printing cylinder so that it is also cleaned.

Sofern die Relativstellung von Gummituchzylinder und Plattenzylinder und/oder Plattenzylinder und Feuchtauftragwalze und/oder Plattenzylinder und Farbauftragwalze(n) und/oder einer Zwischenwalze und der Feuchtauftragwalze bzw. einer zugehörigen Farbauftragwalze ebenfalls frei steuerbar einstellbar ist, kann -je nach Steuerzustand- eine Reinigung oder das Verhindern einer Reinigung der entsprechenden Teile von nur einer Wascheinrichtung aus erfolgen.If the relative position of the blanket cylinder and plate cylinder and / or plate cylinder and dampening roller and / or plate cylinder and inking roller (s) and / or an intermediate roller and the dampening roller or an associated inking roller is also freely controllable, depending on the control state, cleaning or preventing cleaning of the corresponding parts can be carried out from only one washing device.

Die freie Steuerbarkeit des Druckzylinders wird mittels einer im Fortdruckbetrieb an sich dem Bedruckstoffdickenausgleich dienenden Druckbeistellung vorgenommen. Die bestimmungsgemäß einem ganz anderen Zweck dienende Druckbeistellung wird daher erfindungsgemäß neu verwendet, indem sie nicht im Druckprozeß, sondern im Waschprozeß eingesetzt wird. Durch ihre Verstellbarkeit, die vorzugsweise ferngesteuert mittels eines Antriebs erfolgen kann, läßt sich sowohl eine Anlagestellung von Gummituchzylinder und Druckzylinder als auch eine Abstandstellung dieser Zylinder erzielen. Insofern wird entweder der Druckzylinder mitgewaschen oder nicht.The free controllability of the printing cylinder is carried out by means of a pressure supply which serves to compensate for the substrate thickness in continuous printing operation. The provision of printing, which is intended to serve a completely different purpose, is therefore used anew according to the invention in that it is used not in the printing process but in the washing process. Due to their adjustability, which can preferably be carried out remotely by means of a drive, both a contact position of the blanket cylinder and impression cylinder and a spacing position of these cylinders can be achieved. In this respect, the printing cylinder is either washed or not.

Sofern beim Waschvorgang eine mit einer Feuchtmittel-Tauchwalze zusammenwirkende Dosierwalze des Feuchtwerks von der Feuchtauftragwalze abgestellt wird, ist sichergestellt, daß keine Waschflüssigkeit in die Feuchtmittelliefereinrichtung der Druckmaschine eindringen kann. Gleiches gilt für das Farbwerk, das heißt, hier wird während des Waschvorgangs eine mit einer Farbduktorwalze zusammenwirkende Heberwalze des Farbwerks von einer zu den Farbauftragwalzen führenden Farbwerkwalze abgestellt, so daß das Eindringen von Waschflüssigkeit in die Farbliefereinrichtung verhindert ist.If a dosing roller of the dampening unit interacting with a dampening solution immersion roller is switched off by the dampening application roller during the washing process, it is ensured that no washing liquid can penetrate into the dampening solution delivery device of the printing press. The same applies to the inking unit, that is to say that during the washing process a jack roller of the inking unit interacting with an inking roller is switched off by an inking unit roller leading to the inking rollers, so that the penetration of washing liquid into the ink delivery device is prevented.

Die Zeichnung veranschaulicht die Erfindung anhand von Ausführungsbeispielen und zwar zeigt:

Figur 1
ein Walzenschema einer Offset-Druckmaschine in Waschstellung zur Reinigung eines Gummituchzylinders,
Figur 2
die Walzenanordnung der Figur 1 im Waschbetrieb von Gummituchzylinder und einem Plattenzylinder,
Figur 3
die Walzenanordnung der Figur 2, wobei jedoch Walzen eines Feuchtwerks mitgereinigt werden,
Figur 4
die Walzenanordnung der Figur 2, wobei jedoch Walzen eines Farbwerks mitgereinigt werden,
Figur 5
die Walzenanordnung der Figur 2, jedoch mit an den Plattenzylinder angestellten Farb- und Feuchtauftragwalzen,
Figur 6
die Walzenanordnung der Figur 3, wobei das Farb- und Feuchtwerk über eine Zwischenwalze miteinander verbunden und eine Reinigung über die Feuchtauftragwalze erfolgt,
Figur 7
die Walzenanordnung der Figur 4, jedoch mit Anlagestellung der Zwischenwalze zur Verbindung von Farb- und Feuchtwerk und
Figur 8
die Walzenanordnung der Figur 1 im Waschbetrieb von Gummituchzylinder und einem Druckzylinder.
The drawing illustrates the invention using exemplary embodiments and shows:
Figure 1
a roller diagram of an offset printing machine in the washing position for cleaning a blanket cylinder,
Figure 2
1 in the washing operation of blanket cylinder and a plate cylinder,
Figure 3
the roller arrangement of Figure 2, but rollers of a dampening unit are also cleaned,
Figure 4
2 the roller arrangement of FIG. 2, however rollers of an inking unit are also cleaned,
Figure 5
2 the roller arrangement of FIG. 2, but with ink and dampening rollers set on the plate cylinder,
Figure 6
3 the roller arrangement of FIG. 3, the inking and dampening unit being connected to one another via an intermediate roller and cleaning being carried out via the dampening application roller,
Figure 7
the roller arrangement of Figure 4, but with the intermediate roller in contact position for connecting the inking and dampening units and
Figure 8
the roller assembly of Figure 1 in the washing operation of blanket cylinder and a printing cylinder.

Die Figur 1 zeigt ein Walzenschema einer nicht näher dargestellten Offset-Druckmaschine. Das Walzenschema weist ein Farbwerk 1 und ein Feuchtwerk 2 auf. Das Farbwerk 1 ist mit einem Farbkasten 3 versehen, das (nichtdargestellte) Dosierelemente zum Einstellen zonaler Farbspalte besitzt. Aus dem Farbkasten 3 nimmt ein Farbduktor 4 während des Betriebs dosiert Farbe. Eine schwenkbewegliche Heberwalze 5 wirkt mit dem Farbduktor 4 sowie einem angetriebenen Reibzylinder 6 zusammen. Das Feuchtwerk 2 weist ein mit Feuchtmittel 27 gefüllten Feuchtmittelkasten 26 auf, wobei in das Feuchtmittel 27 eine Tauchwalze 28 mit einem Teilabschnitt ihres Umfangs eintaucht. Die Tauchwalze 28 wirkt mit einer Dosierwalze 29 zusammen. Ferner ist eine Gummiwalze 30 vorgesehen. Farb- und Feuchtwerk 1,2 weisen ferner weitere, mit Antrieb versehene Reibzylinder 7,8,9 und 10 auf. Ferner sind sechs Reiter- und Übertragungswalzen 11 bis 16 und neun Gummiwalzen 17 bis 25 vorgesehen. Mittels einer Zwischenwalze 31 können Farb- und Feuchtwerk 1,2 miteinander gekuppelt werden, indem die Zwischenwalze 31 in Anlagestellung zu den Walzen 30 und 18 tritt.FIG. 1 shows a roller diagram of an offset printing machine, not shown in detail. The roller diagram has an inking unit 1 and a dampening unit 2. The inking unit 1 is provided with an ink fountain 3 which (not shown) has metering elements for setting zonal ink gaps. From the ink fountain 3, an ink fountain pen 4 doses ink during operation. A pivotable lifting roller 5 interacts with the ink duct 4 and a driven distribution cylinder 6. The dampening unit 2 has a dampening solution box 26 filled with dampening solution 27, wherein an immersion roller 28 with a partial section of its circumference is immersed in the dampening solution 27. The dipping roller 28 interacts with a metering roller 29. A rubber roller 30 is also provided. Inking and dampening units 1, 2 also have further, driven cylinders 7, 8, 9 and 10. Furthermore, six rider and transfer rollers 11 to 16 and nine rubber rollers 17 to 25 are provided. An intermediate roller 31 can be used to couple the inking and dampening units 1, 2 by the intermediate roller 31 coming into contact with the rollers 30 and 18.

Mittels der beschriebenen Walzenanordnung kann einer Druckform 32 sowohl Farbe als auch Feuchtmittel zugeführt werden. Bei der Druckform 32 handelt es sich um eine auf einem Plattenzylinder 33 aufgespannte Druckplatte (nicht dargestellt). Die Übertragung von Farbe und Feuchtmittel vom Farbwerk 1 bzw. Feuchtwerk 2 zur Druckplatte wird von dem Gummiwalzen 18,20,23,25 und 30 vorgenommen. Die Gummiwalzen 18,20,23 und 25 werden daher auch als die Farbe übertragende Farbauftragswalzen 34 und die Gummiwalze 30 -in bezug auf das Feuchtmittel 27-als Feuchtauftragwalze 35 bezeichnet.Using the roller arrangement described, both ink and fountain solution can be supplied to a printing form 32. The printing form 32 is a printing plate (not shown) mounted on a plate cylinder 33. The transfer of ink and dampening solution from the inking unit 1 or dampening unit 2 for the printing plate is carried out by the rubber rollers 18, 20, 23, 25 and 30. The rubber rollers 18, 20, 23 and 25 are therefore also referred to as the ink-transferring inking rollers 34 and the rubber roller 30 —in relation to the dampening solution 27 — as the dampening roller 35.

Ferner ist ein Gummituchzylinder 36 und Druckzylinder 37 vorgesehen. Dem Gummituchzylinder 36 ist eine Wascheinrichtung 38 zugeordnet, die mittels einer nicht dargestellten Steuereinrichtung in Anlagestellung an die Mantelfläche, das heißt, an das Gummituch des Gummituchzylinders 36 anstellbar ist. Die Wascheinrichtung 38 weist zwei Waschwalzen 39 sowie eine die Waschwalzen 39 verbindende, gemeinsame Walze 40 auf. Ferner ist eine Übertragungswalze 41 vorgesehen, die in Kontakt zur oberen Waschwalze 39 steht und der mittels einer Sprüheinrichtung 42 oder dergleichen Waschflüssigkeit 43 zuführbar ist. Der Walze 40 ist eine Rakeleinrichtung 44 zugeordnet, unter der eine Auffangwanne 45 angeordnet ist.A blanket cylinder 36 and impression cylinder 37 are also provided. The blanket cylinder 36 is associated with a washing device 38, which can be adjusted by means of a control device, not shown, in the contact position against the lateral surface, that is, against the blanket of the blanket cylinder 36. The washing device 38 has two washing rollers 39 and a common roller 40 connecting the washing rollers 39. Furthermore, a transfer roller 41 is provided which is in contact with the upper washing roller 39 and which can be supplied with washing liquid 43 by means of a spray device 42 or the like. A doctor device 44 is associated with the roller 40, under which a collecting trough 45 is arranged.

Ferner ist eine (nicht dargestellte) Druckbeistellung vorhanden, die einen vom Bedienpult und/oder einem Rechner der Maschinensteuerung fernsteuerbaren Antrieb aufweist, wodurch der Abstand zwischen dem Gummituchzylinder 36 und dem Druckzylinder 37 einstellbar ist. Im Fortdruckbetrieb wird die Einstellung entsprechend der Dicke des verwendeten Druckstoffs (z.B. Papier) vorgenommen. Erfindungsgemäß ist vorgesehen, daß die Druckbeistellung im Waschbetrieb der Offset-Druckmaschine dazu verwendet wird, um entweder eine Anlagestellung von Gummituchzylinder 36 und Druckzylinder 37 oder eine Abstandsstellung dieser Zylinder zu erzeugen. Mithin liegt eine freie Steuerbarkeit vor, wobei eine an sich für eine ganz andere Betriebsart bekannte Einrichtung (Druckbeistellung) erfindungsgemäß auf neue Art und Weise verwendet wird. Hierdurch ist es möglich, für den Waschbetrieb quasi in den "DRUCK AN"-Betrieb zu gehen, bei dem normalerweise zunächst Gummituchzylinder 36 und Plattenzylinder 33 und -ca. nach einer Umdrehung- Druckzylinder 37 und Gummituchzylinder 36 in Kontakt treten. Wird jedoch kein Bedruckstoff zugeführt und außerdem die Druckbeistellung erfindungsgemäß derart eingestellt, daß eine Abstandsstellung zwischen dem Gummituchzylinder 36 und dem Druckzylinder 37 vorliegt, so kann bei an den Gummituchzylinder 36 angestellter Wascheinrichtung 38 sowohl der Gummituchzylinder 36 als auch der Plattenzylinder 33, das heißt, die dort aufgespannte Druckplatte, gewaschen werden.Furthermore, there is a (not shown) printing supply which has a drive which can be remotely controlled by the control panel and / or a computer of the machine control, as a result of which the distance between the blanket cylinder 36 and the printing cylinder 37 can be set. In production printing, the setting is made according to the thickness of the printing material used (eg paper). According to the invention it is provided that the pressure supply in the washing operation of the offset printing press is used to either a position of To produce blanket cylinder 36 and impression cylinder 37 or a spacing of these cylinders. There is therefore free controllability, with a device (pressure supply) known per se for a completely different operating mode being used in a new way according to the invention. This makes it possible to go into the "PRINT ON" mode for the washing operation, in which normally first blanket cylinders 36 and plate cylinders 33 and -ca. after one revolution, press cylinder 37 and blanket cylinder 36 come into contact. However, if no printing material is supplied and, in addition, the printing supply is set according to the invention such that there is a spacing position between the blanket cylinder 36 and the printing cylinder 37, then with the washing device 38 employed on the blanket cylinder 36, both the blanket cylinder 36 and the plate cylinder 33, that is to say the printing plate clamped there can be washed.

Die bereits erwähnte Steuereinrichtung erlaubt ferner eine freie Steuerbarkeit der einzelnen Walzen bzw. Zylinder der Offset-Druckmaschine, so daß eine separate Verlagerung des Gummituchzylinders 36 und/oder des Plattenzylinders 33 und/oder der Farbauftragwalzen 34 und/oder der Feuchtauftragwalze 35 und/oder der Dosierwalze 29 und/oder der Heberwalze 5 und/oder der Zwischenwalze 31 möglich ist. Diese freie Steuerbarkeit besteht auch im Hinblick auf den Druckzylinder 37, und zwar entweder mittels der Druckbeistellung oder mittels einer separaten Einrichtung zur Zylinderverlagerung.The control device already mentioned also allows free control of the individual rollers or cylinders of the offset printing press, so that a separate displacement of the blanket cylinder 36 and / or the plate cylinder 33 and / or the inking rollers 34 and / or the dampening roller 35 and / or the Metering roller 29 and / or the lifting roller 5 and / or the intermediate roller 31 is possible. This free controllability also exists with regard to the pressure cylinder 37, either by means of the pressure supply or by means of a separate device for cylinder displacement.

Mit den in den Figuren 1 bis 7 dargestellten Walzen bzw. Zylindern eines Druckwerks der Offset-Druckmaschine lassen sich folgende Waschbetriebsarten durchführen:The following washing operating modes can be carried out with the rollers or cylinders of a printing unit of the offset printing press shown in FIGS. 1 to 7:

Gemäß Figur 1 weisen Plattenzylinder 33 und Druckzylinder 37 eine Abstandsstellung zum Gummituchzylinder 36 auf, so daß die mit der Mantelfläche des Gummituchzylinders 36 zusammenwirkende Wascheinrichtung 38 lediglich das auf den Gummituchzylinder 36 aufgespannte Gummituch reinigt.According to FIG. 1, the plate cylinder 33 and impression cylinder 37 are at a distance from the blanket cylinder 36, so that the washing device 38, which interacts with the outer surface of the blanket cylinder 36, only cleans the blanket stretched onto the blanket cylinder 36.

In der Stellung des Walzenschemas der Figur 2 nimmt der Druckzylinder 37 aufgrund einer entsprechenden Einstellung der Druckbeistellung eine Abstandsstellung zum Gummituchzylinder 36 ein. An der Mantelfläche des Gummituchzylinders 36 liegen die Waschwalzen 39 der Wascheinrichtung 38 an. Ferner besteht ein Kontakt zwischen dem Gummituchzylinder 36 und dem Plattenzylinder 33. Insofern werden gleichzeitig Gummituchzylinder 36 und Plattenzylinder 33, das heißt, das Gummituch und die Druckplatte gereinigt.In the position of the roller diagram in FIG. 2, the printing cylinder 37 assumes a spacing position from the blanket cylinder 36 on account of a corresponding setting of the pressure supply. The washing rollers 39 of the washing device 38 rest on the outer surface of the blanket cylinder 36. Furthermore, there is contact between the blanket cylinder 36 and the plate cylinder 33. In this respect, blanket cylinder 36 and plate cylinder 33, that is, the blanket and the printing plate are cleaned at the same time.

Die Figur 3 zeigt eine Stellung der einzelnen Zylinder bzw. Walzen, in der sowohl der Gummituchzylinder 36 und der Plattenzylinder 33 als auch Walzen des Feuchtwerks 2 gereinigt werden. Hierzu nehmen Gummituchzylinder 36 und Plattenzylinder 33 eine Anlagestellung ein. Ferner liegt die Feuchtauftragwalze 35 an der Mantelfläche des Plattenzylinder 33 an. Der Reibzylinder 10 und die Zwischenwalze 31 sind an die Feuchtauftragwalze 35 angestellt. Die Farbauftragwalzen 34 liegen beabstandet zum Plattenzylinder 33. Insofern wird die von der Wascheinrichtung 38 gelieferte Waschflüssigkeit auf den Gummituchzylinder 36 und von dort über den Plattenzylinder 33 auf die Feuchtauftragwalze 35, die Zwischenwalze 31 und den Reibzylinder 10 übertragen. Alle genannten Zylinder bzw. Walzen, die Kontakt zueinander haben, werden daher gereinigt. Dies gilt insbesondere auch für die dem Feuchtwerk 2 angehörenden Bauteile, die z.B. mit Farbpartikeln verschmutzt sein können, die im Fortdruckprozeß über die Zwischenwalze 31 vom Farbwerk 1 ins Feuchtwerk 2 wandern oder von der Druckform 32 abgegeben werden.FIG. 3 shows a position of the individual cylinders or rollers in which both the blanket cylinder 36 and the plate cylinder 33 and the rollers of the dampening unit 2 are cleaned. For this purpose, blanket cylinder 36 and plate cylinder 33 take up a contact position. Furthermore, the dampening roller 35 bears against the outer surface of the plate cylinder 33. The distribution cylinder 10 and the intermediate roller 31 are set against the dampening roller 35. The inking rollers 34 are spaced from the plate cylinder 33. In this respect, the Washer 38 delivered washing liquid to the blanket cylinder 36 and from there via the plate cylinder 33 to the dampening roller 35, the intermediate roller 31 and the distribution cylinder 10. All the cylinders or rollers mentioned that are in contact with one another are therefore cleaned. This also applies in particular to the components belonging to the dampening unit 2, which may be contaminated, for example, with ink particles, which migrate from the inking unit 1 into the dampening unit 2 or are released by the printing form 32 in the continuous printing process via the intermediate roller 31.

Um zu verhindern, daß Waschflüssigkeit in eine Feuchtmittelliefereinrichtung 46 des Feuchtwerks 2 gelangen, wird die Dosierwalze 29 von der Steuereinrichtung derart verlagert, daß sie eine Abstandsstellung zur Feuchtauftragwalze 35 einnimmt. Andererseits ist dadurch auch verhindert, daß Feuchtmittel 27 zur Feuchtauftragwalze 35 geliefert wird und die Waschflüssigkeit verwässert.In order to prevent washing liquid from getting into a dampening agent delivery device 46 of the dampening unit 2, the metering roller 29 is displaced by the control device in such a way that it assumes a spaced position from the dampening application roller 35. On the other hand, this also prevents dampening solution 27 from being supplied to the dampening roller 35 and watering down the washing liquid.

In der Figur 4 ist eine Stellung der Walzenanordnung gezeigt, in der die Wascheinrichtung 38 mit dem Gummituchzylinder 36 zusammenwirkt, der eine Abstandsstellung zum Druckzylinder 37 und eine Anlagestellung zum Plattenzylinder 33 aufweist. Die Farbauftragwalzen 34 sind an den Plattenzylinder 33 angestellt, die Feuchtauftragwalze 35 besitzt eine Abstandsstellung zum Plattenzylinder 33 und die Zwischenwalze 31 befindet sich in Anlagestellung zur Feuchtauftragwalze 35 und in Abstandsstellung zur ersten Farbauftragwalzen 34 (sogenannte kleine Trennung). Die Waschflüssigkeit gelangt daher über den Gummituchzylinder 36 zum Plattenzylinder 33 und von dort über die Farbauftragwalzen 34 zu den entsprechenden Walzen und Zylinder des Farbwerks 1, so daß diese Teile gereinigt werden. Um zu verhindern, daß die Waschflüssigkeit in eine Farbliefereinrichtung 47 des Farbwerks 1 gelangt, nimmt mittels der erwähnten Steuereinrichtung die Heberwalze 5 eine Trennstellung zum Reibzylinder 6 ein. Der Druckzylinder 37 befindet sich mittels der Druckbeistellung in Abstandsstellung zum Gummituchzylinder 36, so daß er nicht mitgereinigt wird. Im Gegensatz zu den bekannten, sonst üblichen Verfahren der Reinigung des Plattenzylinders 33 über das Farbwerk 1 wird hier ein ganz anderer Weg beschritten, indem - ausgehend vom Gummituchzylinder 36- der Plattenzylinder 33 und von dort aus das Farbwerk 1 gereinigt wird.FIG. 4 shows a position of the roller arrangement in which the washing device 38 interacts with the blanket cylinder 36, which has a spacing position from the printing cylinder 37 and an abutment position from the plate cylinder 33. The inking rollers 34 are set against the plate cylinder 33, the dampening roller 35 is at a distance from the plate cylinder 33 and the intermediate roller 31 is in contact with the dampening roller 35 and at a distance from the first inking roller 34 (so-called small separation). The washing liquid therefore gets over the blanket cylinder 36 to the plate cylinder 33 and from there via the inking rollers 34 to the corresponding rollers and cylinders of the inking unit 1, so that these parts are cleaned. In order to prevent the washing liquid from entering a ink delivery device 47 of the inking unit 1, the lifting roller 5 assumes a separation position from the distribution cylinder 6 by means of the control device mentioned. The pressure cylinder 37 is located by means of the pressure supply in a spaced position from the blanket cylinder 36, so that it is not also cleaned. In contrast to the known, otherwise customary methods of cleaning the plate cylinder 33 via the inking unit 1, a completely different path is followed here, in that the plate cylinder 33 and from there the inking unit 1 are cleaned, starting from the blanket cylinder 36.

Eine weitere Stellung des Walzenschemas ist in der Figur 5 wiedergegeben. Dort liegt im wesentlichen eine Walzen- bzw. Zylinderstellung vor, die im Fortdruckprozeß eingenommen wird. In Abweichung dazu befindet sich jedoch die Wascheinrichtung 38 in Kontakt zur Mantelfläche des Gummituchzylinder 36. Ferner nehmen Druckzylinder 37 und Gummituchzylinder 36 eine Abstandsstellung mittels der Druckbeistellung ein. Ferner besteht eine Trennung zwischen Dosierwalze 29 und Feuchtauftragwalze 35 sowie zwischen Reibzylinder 6 und Heberwalze 5. Eine Anlagestellung nehmen Gummituchzylinder 36 und Plattenzylinder 33 sowie die Farbauftragwalzen 34 und die Feuchtauftragwalze 35 zum Plattenzylinder 33 ein. Mittels der Zwischenwalze 31 sind Farb- und Feuchtwerk 1,2 miteinander gekuppelt. Die beschriebene Walzen- bzw. Zylinderstellung ermöglicht eine umfassende Reinigung von Farb- und Feuchtwerk 1,2 sowie Plattenzylinder 33 und Gummituchzylinder 36. Sofern auch eine Reinigung des Druckzylinders 37 gewünscht ist, kann die Druckbeistellung derart verstellt werden, daß der Druckzylinder 37 in Kontakt zum Gummituchzylinder 36 tritt, wodurch die Waschflüssigkeit auch die Mantelfläche des Druckzylinders 37 benetzt.Another position of the roller diagram is shown in FIG. 5. There is essentially a roller or cylinder position, which is assumed in the production process. In deviation from this, however, the washing device 38 is in contact with the outer surface of the blanket cylinder 36. Furthermore, the impression cylinder 37 and blanket cylinder 36 assume a spacing position by means of the pressure provided. There is also a separation between metering roller 29 and dampening roller 35 and between distribution cylinder 6 and lifting roller 5. A blanket cylinder 36 and plate cylinder 33 as well as the inking rollers 34 and the dampening roller 35 form a plate cylinder 33. The inking and dampening units 1, 2 are coupled to one another by means of the intermediate roller 31. The one described Roller or cylinder position enables extensive cleaning of inking and dampening units 1, 2 as well as plate cylinder 33 and blanket cylinder 36. If cleaning of the printing cylinder 37 is also desired, the pressure supply can be adjusted such that the printing cylinder 37 is in contact with the blanket cylinder 36 occurs, whereby the washing liquid also wets the outer surface of the pressure cylinder 37.

Die Anordnung der Figur 6 zeigt eine Walzenstellung, bei der Farb- und Feuchtwerk 1,2 über die Zwischenwalze 31 miteinander gekuppelt sind und eine Anlagestellung der Feuchtauftragwalze 35 zum Plattenzylinder 33 besteht. Ferner haben Gummituchzylinder 36 und Plattenzylinder 33 miteinander Kontakt. Die Wascheinrichtung 38 wirkt mit dem Gummituchzylinder 36 zusammen. Feuchtmittelliefereinrichtung 46 und Farbliefereinrichtung 47 sind von den übrigen Bauteilen von Farb- und Feuchtwerk 1,2 getrennt. Damit wird sowohl der Gummituchzylinder 36 als auch der Plattenzylinder 33 und über den Kontakt von letzterem zur Feuchtauftragwalze 35 auch das Feuchtwerk 2 und über die Zwischenwalze 31 auch das Farbwerk 1 gereinigt.The arrangement in FIG. 6 shows a roller position in which the inking and dampening units 1, 2 are coupled to one another via the intermediate roller 31 and the dampening roller 35 is in contact with the plate cylinder 33. Furthermore, blanket cylinder 36 and plate cylinder 33 are in contact with each other. The washing device 38 interacts with the blanket cylinder 36. The dampening solution delivery device 46 and the ink delivery device 47 are separated from the other components of the inking and dampening unit 1, 2. This cleans both the blanket cylinder 36 and the plate cylinder 33 and, via the contact of the latter with the dampening application roller 35, the dampening unit 2 and, via the intermediate roller 31, the inking unit 1.

Die Figur 7 zeigt eine Walzen- bzw. Zylinderstellung, bei der eine Reinigung des Feuchtwerks 2 über das Farbwerk 1 erfolgt. Hierzu befinden sich Gummituchzylinder 36 und Plattenzylinder 33 in Anlagestellung. Ferner sind die Farbauftragwalzen 34 an die Mantelfläche des Plattenzylinders 33 angestellt. Über die Zwischenwalze 31 ist die erste Farbauftragwalze 34 mit der Feuchtauftragwalze 35 gekoppelt, die sich jedoch nicht in Kontakt zum Plattenzylinder 33 befindet. Feuchtmittelliefereinrichtung 46 und Farbliefereinrichtung 47 sind durch entsprechende Stellungen von Dosierwalze 29 und Heberwalze 5 abgetrennt. Die Waschflüssigkeit gelangt von der Wascheinrichtung 38 zum Gummituchzylinder 36 und von dort zum Plattenzylinder 33. Dieser überträgt einen Teil der Waschflüssigkeit mittels der Farbauftragwalzen 34 in das Farbwerk 1. Von dort gelangt Waschflüssigkeit über die Zwischenwalze 31 zu der Feuchtauftragwalze 35 und zu dem Reibzylinder 10.FIG. 7 shows a roller or cylinder position in which the dampening unit 2 is cleaned via the inking unit 1. For this purpose, blanket cylinders 36 and plate cylinders 33 are in the contact position. Furthermore, the inking rollers 34 are placed on the outer surface of the plate cylinder 33. The first inking roller 34 with the dampening roller 35 is above the intermediate roller 31 coupled, but which is not in contact with the plate cylinder 33. Dampening agent delivery device 46 and ink delivery device 47 are separated from the metering roller 29 and lifting roller 5 by appropriate positions. The washing liquid passes from the washing device 38 to the blanket cylinder 36 and from there to the plate cylinder 33. The latter transfers part of the washing liquid to the inking unit 1 by means of the inking rollers 34. From there, the washing liquid reaches the dampening roller 35 and the distribution cylinder 10 via the intermediate roller 31.

Auch hier ist -wie auch bei allen übrigen Stellungen der anderen Figuren- die Möglichkeit gegeben, daß der Druckzylinder 37 eine Abstandsstellung mittels der Druckbeistellung zum Gummituchzylinder 36 aufweist oder -durch entsprechende Verstellung der Druckbeistellung- eine Anlagestellung zum Gummituchzylinder 36 einnimmt, so daß er mitgereinigt wird.Here too - as with all other positions of the other figures - there is the possibility that the printing cylinder 37 has a spacing position by means of the pressure supply to the blanket cylinder 36 or - by corresponding adjustment of the printing supply - assumes a contact position with the blanket cylinder 36 so that it also cleans becomes.

Schließlich zeigt die Figur 8 eine Walzen- bzw. Zylinderstellung, bei der der Gummituchzylinder 36 eine Anlagestellung zum Druckzylinder 37 einnimmt, so daß mit der Wascheinrichtung 38 diese beiden Zylinder gereinigt werden. Die Anlagestellung ist durch eine entsprechende Einstellung der Druckbeistellung erzielt.Finally, FIG. 8 shows a roller or cylinder position, in which the blanket cylinder 36 assumes an abutment position with the printing cylinder 37, so that these two cylinders are cleaned with the washing device 38. The system position is achieved by a corresponding setting of the pressure supply.

Claims (13)

  1. Printing machine, in particular offset printing machine, whose printing unit has a plate cylinder, a blanket cylinder and an impression cylinder and an inking and damping unit provided with ink and damping-medium applicator rollers, and having a washing device which, in the washing-operation position is engaged by a control device against the blanket cylinder, characterized in that, in washing operation, the impression cylinder (37) can be moved into a remote or contact position relative to the blanket cylinder (36) by an adjuster which actually serves to compensate printing-carrier thicknesses during the running-on operation.
  2. Printing machine according to Claim 1, characterized in that the adjuster has a remote-control drive, in particular an electric drive.
  3. Printing machine according to one of the preceding claims, characterized in that the control device moves the blanket cylinder (36) into a contact position relative to the plate cylinder (33).
  4. Printing machine according to one of the preceding claims, characterized in that the control device moves the damping-medium applicator roller (35) into a contact position relative to the plate cylinder (33).
  5. Printing machine according to one of the preceding claims, characterized in that the control device separates a damping-medium supply device (46) from rollers of the damping unit (2) leading to the plate cylinder (33).
  6. Printing machine according to one of the preceding claims, characterized in that the control device connects the inking unit and the damping unit (1, 2) to one another via an intermediate roller (31) so that rollers of the inking unit (1) and/or damping unit (2) are washed with washing liquid supplied by the damping unit (2) and/or inking unit (1).
  7. Printing machine according to one of the preceding claims, characterized in that the control device engages the ink applicator rollers (34) against the plate cylinder (33) to wash the rollers of the inking unit (1).
  8. Printing machine according to one of the preceding claims, characterized in that the control device separates an ink supply device (47) from rollers of the inking unit (1) leading to the plate cylinder (33).
  9. Method for cleaning cylinders and rollers of a printing unit of a printing machine, preferably according to one or more of the preceding claims, in particular an offset printing machine, the printing unit having a plate cylinder, a blanket cylinder and an impression cylinder and an inking and damping unit which is provided with ink and damping-medium applicator rollers and which is furthermore provided with a washing device which is engaged against the blanket cylinder for the washing operation, characterized in that, in washing operation, the impression cylinder (37) is moved into a remote or contact position relative to the blanket cylinder (36) by an adjuster which actually serves to compensate printing-carrier thicknesses during the running-on operation.
  10. Method according to Claim 9, characterized in that the relative position of the blanket cylinder (36) and plate cylinder (33) and/or plate cylinder (33) and damping-medium applicator roller (35) and/or plate cylinder (33) and ink applicator roller(s) (34) and/or an intermediate roller (31) and the damping-medium applicator roller (35) or ink applicator roller (34) can be adjusted in a freely controllable manner.
  11. Method according to one of the preceding claims, characterized in that the free controllability of the impression cylinder (37) is carried out by means of an adjuster which actually serves to compensate printing carrier thicknesses during the running-on operation.
  12. Method according to one of the preceding claims, characterized in that, during the washing operation, a metering roller (29) of the damping unit (2), interacting with a damping-medium dipping roller (28) is thrown off by the damping-medium applicator roller (35).
  13. Method according to one of the preceding claims, characterized in that, during the washing operation, a vibrator roller (5) of the inking unit (1), interacting with an ink ductor roller (4) is thrown off by an inking unit roller (distributor cylinder 6) leading to the ink applicator rollers (34).
EP91105538A 1990-04-27 1991-04-08 Printing machine with washing device Expired - Lifetime EP0453853B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4013465A DE4013465A1 (en) 1990-04-27 1990-04-27 PRINTING MACHINE WITH WASHING DEVICE
DE4013465 1990-04-27

Publications (3)

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EP0453853A2 EP0453853A2 (en) 1991-10-30
EP0453853A3 EP0453853A3 (en) 1992-02-12
EP0453853B1 true EP0453853B1 (en) 1995-06-28

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EP91105538A Expired - Lifetime EP0453853B1 (en) 1990-04-27 1991-04-08 Printing machine with washing device

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US (1) US5174209A (en)
EP (1) EP0453853B1 (en)
JP (1) JPH04229273A (en)
AT (1) ATE124329T1 (en)
CA (1) CA2039355A1 (en)
DE (2) DE4013465A1 (en)

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DE9110345U1 (en) * 1991-08-22 1991-10-10 Heidelberger Druckmaschinen Ag, 6900 Heidelberg, De
DE4312229C2 (en) * 1993-04-14 1999-10-28 Heidelberger Druckmasch Ag Process for the defined generation of a color distribution close to production in the inking unit of rotary printing presses
DE4338625A1 (en) * 1993-11-12 1995-05-18 Oxy Dry Maschinen Gmbh Process for fully automatic cylinder cleaning in printing presses with a central control system
DE19501806C5 (en) * 1995-01-21 2005-08-18 Man Roland Druckmaschinen Ag Method for cleaning cylinders and rollers of a printing unit of a printing machine
DE19843363B4 (en) * 1998-09-22 2006-04-13 Koenig & Bauer Ag Method for cleaning cylinders and rollers
DE29905660U1 (en) * 1999-03-26 2000-08-10 Heidelberger Druckmasch Ag Printing machine with a cleaning device for cleaning two printing press cylinders
DE19937272A1 (en) * 1999-08-06 2001-02-15 Koenig & Bauer Ag Process for cleaning cylinders
DE10057051B4 (en) * 1999-12-06 2011-03-10 Heidelberger Druckmaschinen Ag Method for starting a printing press
DE60141261D1 (en) 2000-05-17 2010-03-25 Komori Printing Mach Method of removing printing ink for a printing press
JP4824192B2 (en) * 2000-05-17 2011-11-30 株式会社小森コーポレーション Ink removal method for printing press
DE10032703A1 (en) * 2000-07-05 2002-01-17 Koenig & Bauer Ag Process and device in printing machines for imaging surfaces
US6997108B2 (en) 2001-08-21 2006-02-14 Mitsubishi Heavy Industries, Ltd. Plate-making type printing press, multi-color printing press and plate-making type printing method
JP4205971B2 (en) 2003-02-24 2009-01-07 東京印刷機材トレーディング株式会社 Impression cylinder jacket cleaning device for sheet-fed offset duplex printing press
EP1593512A3 (en) 2004-05-04 2006-05-24 MAN Roland Druckmaschinen AG Printing machine
JP4786325B2 (en) * 2004-12-21 2011-10-05 ハイデルベルガー ドルツクマシーネン アクチエンゲゼルシヤフト Method for cleaning an anilox inking device of a printing press
DE102007009969B4 (en) * 2006-05-19 2017-07-06 Heidelberger Druckmaschinen Ag Method of cleaning an anilox inking unit
US8015918B2 (en) * 2007-03-20 2011-09-13 Komori Corporation Cleaning apparatus
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
EP2520431B1 (en) * 2011-05-02 2014-03-12 Heidelberger Druckmaschinen AG Method for cleaning colour decks in offset printers and offset printer
CN103879143B (en) * 2012-12-21 2017-01-18 江苏中德包装机械有限公司 Automatic cleaning method of offset press cylinder
DE102013112919A1 (en) * 2013-11-22 2015-05-28 Manroland Web Systems Gmbh Method for operating a printing machine

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JPH0764053B2 (en) * 1988-12-06 1995-07-12 株式会社東京機械製作所 Method and device for automatically cleaning liquid supply roller of rotary press

Also Published As

Publication number Publication date
EP0453853A3 (en) 1992-02-12
DE59105825D1 (en) 1995-08-03
CA2039355A1 (en) 1991-10-28
ATE124329T1 (en) 1995-07-15
EP0453853A2 (en) 1991-10-30
US5174209A (en) 1992-12-29
DE4013465A1 (en) 1991-10-31
JPH04229273A (en) 1992-08-18

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