EP0780228B1 - Method and means for cleaning the squeegee device of the inking unit of a rotary printing machine - Google Patents

Method and means for cleaning the squeegee device of the inking unit of a rotary printing machine Download PDF

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Publication number
EP0780228B1
EP0780228B1 EP96118005A EP96118005A EP0780228B1 EP 0780228 B1 EP0780228 B1 EP 0780228B1 EP 96118005 A EP96118005 A EP 96118005A EP 96118005 A EP96118005 A EP 96118005A EP 0780228 B1 EP0780228 B1 EP 0780228B1
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Prior art keywords
ink
solvent
pumped
tank
die
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EP96118005A
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German (de)
French (fr)
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EP0780228A1 (en
Inventor
Fritz Achelpohl
Günter Rogge
Ludger Ottenhues
Lutz Telljohann
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Windmoeller and Hoelscher KG
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Windmoeller and Hoelscher KG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F35/00—Cleaning arrangements or devices
    • B41F35/06—Cleaning arrangements or devices for offset cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F35/00—Cleaning arrangements or devices
    • B41F35/04—Cleaning arrangements or devices for inking rollers

Definitions

  • the invention relates to a method for cleaning a doctor blade device for a flushing inking unit of a rotary printing press, from a doctor blade carrier provided with a longitudinal groove, on the two parallel to one another on an inking roller adjustable doctor blades that are attached together with the inking roller, the channel of the doctor blade carrier and an ink chamber at the end of the sealing means provided limit from lines for feeding and discharging the paint in the ink chamber and out of it and out of adjustment devices for pressing the doctor blade holder onto the inking roller there is, after pumping the paint out of the paint chamber this is rinsed with a solvent.
  • the object of the invention is therefore a method of the beginning specified type to create, after in simple and thoroughly remove all paint residues not only from the ink chamber the doctor blade device, but also from the supply and discharge lines have it removed.
  • this object is achieved in a method of the beginning specified type solved in that the color from the ink chamber via the discharge line or lines back into the Color tank is pumped that subsequently from a solvent tank via the feed line or lines from a solvent tank Solvent pumped into the paint chamber and over the drain lines in for a predetermined period of time the paint tank is routed, that then by paint contaminated solvents for a predetermined period of time is pumped into a dirt tank that the Solvent supply from the solvent tank is interrupted and the solvent is pumped into the dirt tank that then fresh solvent via the feed line into the Ink chamber pumped, the suction line to the solvent tank closed and the solvent via the supply and discharge lines in a closed rinse cycle for a specific one Time is pumped and then that in the cycle conveyed solvent is fed into the dirt tank.
  • the individual steps for cleaning the doctor device and the associated lines can be carried out one after the other, the cleaning process being controlled by a computer can.
  • the solvent which is still heavily enriched with color, into the paint tank headed because the resulting thinning of the paint one more can be accepted and excess
  • the solvent evaporates again.
  • the further process steps aim at once a thorough cleaning of the To reach doctor blade device and secondly an economical To ensure solvent consumption because that is in the dirt tank directed and color-enriched solvents especially must be disposed of.
  • the color of the ink chamber is expediently replaced by an in the middle of the feed line is fed in and through side discharge lines sucked out of this again.
  • Embodiment of the invention provided that during the rinse phases the inking roller with one opposite Printing operation is driven at higher speed. This higher Speed causes higher turbulences that favor cleaning.
  • the direction of rotation is expedient during the rinsing phase the inking roller one or more times reversed.
  • a printing unit 1 which consists of a Impression cylinder 2, a pressure roller 3 that can be set on it and an anilox roller 4 which can be set on the printing roller.
  • a doctor blade carrier 5 is adjustable, the consists of a profile bar.
  • the bar of the doctor blade holder 5 is provided with a groove forming the interior of the ink chamber.
  • the printing ink flows into this channel in the middle area feeding hole 6.
  • holes 7, 8 for removing the ink.
  • the end faces of the channel edges of the doctor blade carrier are in opposite directions sloping roof-shaped. Are on these end faces Doctor knife attached, the dingy or brushing on the anilox roller 3 are adjustable. On the sides of the doctor blade holder seals are arranged opposite the interior of the ink chamber seal the anilox roller 4.
  • Doctor devices of this type are, for example, from the German Patent applications 195 16 223.4 and 195 16 224.2 known to which reference is made for a more detailed description of the doctor device becomes.
  • the feed hole 6 in the profile bar of the doctor blade carrier 5 is through a line 10 to the pressure side of a pump 11, which is preferably a piston pump, connected.
  • the suction side of the pump 11 is connected through a line 12 connected to a further pump 13, the suction pipe in a solvent tank 14 protrudes.
  • the holes 7, 8 are through lines 15, 16 with the suction sides connected by pumps 17 coupled together.
  • the printed pages the pumps 17 are optionally via valves 18, 19 a line 20, which opens into the ink tank 21, and with the line 22 connectable, which opens into the dirt tank 23.
  • a check valve 24 is arranged in line 12.
  • the return lines 15, 16 are connected to one another by a line 30 connected.
  • a valve 31 is arranged in the feed line 10, through which the line 10 optionally on the bore 6th or the line 30 is convertible.
  • a valve 32 is arranged through that the pressure side of the pump 11 with the suction side of the pump 17th is connectable.
  • valves 18, 26 the pressure sides of the valves 17 are included the suction side of the valve 11 connectable.
  • the valves 18, 19, 26, 31 and 32 are controllable Directional control valves, for example around solenoid valves. That too Check valve 24 is remotely controllable.
  • valves and pumps are operated by a control device, not shown controlled with a computer so that the pumps and valves can be operated according to predetermined programs.

Description

Die Erfindung betrifft ein Verfahren zur Reinigung einer Rakelvorrichtung für ein Spülfarbwerk einer Rotationsdruckmaschine, die aus einem mit einer längsverlaufenden Rinne versehenen Rakelmesserträger, auf den parallel zueinander zwei an eine Farbauftragswalze anstellbare Rakelmesser befestigt sind, die zusammen mit der Farbauftragswalze, der Rinne des Rakelmesserträgers und endseitig an diesem vorgesehenen Dichtungsmitteln eine Farbkammer begrenzen, aus Leitungen zum Zu- und Abführen der Farbe in die Farbkammer und aus ihr heraus und aus Anstelleinrichtungen zum Andrücken des Rakelmesserträgers an die Farbauftragswalze besteht, bei dem nach dem Abpumpen der Farbe aus der Farbkammer diese mit einem Lösungsmittel gespült wird.The invention relates to a method for cleaning a doctor blade device for a flushing inking unit of a rotary printing press, from a doctor blade carrier provided with a longitudinal groove, on the two parallel to one another on an inking roller adjustable doctor blades that are attached together with the inking roller, the channel of the doctor blade carrier and an ink chamber at the end of the sealing means provided limit from lines for feeding and discharging the paint in the ink chamber and out of it and out of adjustment devices for pressing the doctor blade holder onto the inking roller there is, after pumping the paint out of the paint chamber this is rinsed with a solvent.

Bei einem aus der US-PS 5,402,724 bekannten Verfahren dieser Art wird die Förderrichtung der das Lösungsmittel während der Spülphase durch die Farbkammer leitenden Pumpe mehrmals umgekehrt, um durch die dadurch erfolgte Änderung der Strömungsrichtung des Lösungsmittels eine gründliche Spülung der Farbkammer zu erreichen.In a method of this type known from US Pat. No. 5,402,724 becomes the direction of delivery of the solvent during the rinsing phase reversed several times by the pump conducting the ink chamber, in order to change the direction of flow of the Solvent to achieve a thorough rinsing of the ink chamber.

Nach der Beendigung eines Druckauftrages oder bei einem Wechsel der Druckfarbe ist es erforderlich, die Rakelvorrichtungen zu reinigen, wobei es nicht nur notwendig ist, sämtliche Farbreste aus der Farbkammer und von der Rasterwalze zu entfernen, sondern zusätzlich müssen auch die Zu- und Abführungsleitungen für die Farbe gereinigt werden.After finishing a print job or after a change the ink it is necessary to add the squeegee devices clean, it is not only necessary to remove all paint residues remove from the ink chamber and from the anilox roller, but in addition, the supply and discharge lines for the Paint to be cleaned.

Aufgabe der Erfindung ist es daher, ein Verfahren der eingangs angegebenen Art zu schaffen, nach dem sich in einfacher und gründlicher Weise sämtliche Farbreste nicht nur aus der Farbkammer der Rakelvorrichtung, sondern auch aus den Zu- und Abführungsleitungen entfernen lassen.The object of the invention is therefore a method of the beginning specified type to create, after in simple and thoroughly remove all paint residues not only from the ink chamber the doctor blade device, but also from the supply and discharge lines have it removed.

Erfindungsgemäß wird diese Aufgabe bei einem Verfahren der eingangs angegebenen Art dadurch gelöst, daß die Farbe aus der Farbkammer über die Abführungsleitung oder -leitungen zurück in den Farbtank gepumpt wird, daß anschließend aus einem Lösungsmitteltank über die Zuführungsleitung oder -leitungen aus einem Lösungsmitteltank Lösungsmittel in die Farbkammer gepumpt und über die Abführungsleitungen während eines vorbestimmten Zeitraums in den Farbtank geleitet wird, daß anschließend das noch durch Farbe verschmutzte Lösungsmittel während eines vorbestimmten Zeitraums in einen Schmutztank gepumpt wird, daß anschließend die Lösungsmittelzufuhr aus dem Lösungsmitteltank unterbrochen und das Lösungsmittel in den Schmutztank gepumpt wird, daß anschließend frisches Lösungsmittel über die Zuführungsleitung in die Farbkammer gepumpt, die Ansaugleitung zum Lösungsmitteltank geschlossen und das Lösungsmittel über die Zuführungs- und Abführungsleitungen in einem geschlossenen Spülkreislauf für eine bestimmte Zeit gepumpt wird und daß anschließend das im Kreislauf geförderte Lösungsmittel in den Schmutztank geleitet wird.According to the invention, this object is achieved in a method of the beginning specified type solved in that the color from the ink chamber via the discharge line or lines back into the Color tank is pumped that subsequently from a solvent tank via the feed line or lines from a solvent tank Solvent pumped into the paint chamber and over the drain lines in for a predetermined period of time the paint tank is routed, that then by paint contaminated solvents for a predetermined period of time is pumped into a dirt tank that the Solvent supply from the solvent tank is interrupted and the solvent is pumped into the dirt tank that then fresh solvent via the feed line into the Ink chamber pumped, the suction line to the solvent tank closed and the solvent via the supply and discharge lines in a closed rinse cycle for a specific one Time is pumped and then that in the cycle conveyed solvent is fed into the dirt tank.

Die einzelnen Schritte zur Reinigung der Rakelvorrichtung und der zugehörigen Leitungen lassen sich nacheinander durchführen, wobei der Reinigungsprozeß von einem Rechner gesteuert werden kann. Erfindungsgemäß wird während der ersten Reinigungsphase das noch stark mit Farbe angereicherte Lösungsmittel in den Farbtank geleitet, weil die dadurch erfolgte Verdünnung der Farbe onne weiteres in Kauf genommen werden kann und sich überschüssiges Lösungsmittel wieder verflüchtigt. Die weiteren Verfahrensschritte zielen darauf ab, einmal eine gründliche Reinigung der Rakelvorrichtung zu erreichen und zum anderen einen sparsamen Lösungsmittelverbrauch zu gewährleisten, weil das in den Schmutztank geleitete und mit Farbe angereicherte Lösungsmittel besonders entsorgt werden muß.The individual steps for cleaning the doctor device and the associated lines can be carried out one after the other, the cleaning process being controlled by a computer can. According to the invention during the first cleaning phase the solvent, which is still heavily enriched with color, into the paint tank headed because the resulting thinning of the paint one more can be accepted and excess The solvent evaporates again. The further process steps aim at once a thorough cleaning of the To reach doctor blade device and secondly an economical To ensure solvent consumption because that is in the dirt tank directed and color-enriched solvents especially must be disposed of.

Zweckmäßigerweise wird die Farbe der Farbkammer durch eine in deren Mitte befindliche Zuführungsleitung zugeführt und durch seitliche Abführungsleitungen aus dieser wieder abgesaugt.The color of the ink chamber is expediently replaced by an in the middle of the feed line is fed in and through side discharge lines sucked out of this again.

Um auch die Zuführungsleitung für die Farbe vollständig zu reinigen, wird in vorteilhafter Weise während jeder Spülphase zeitweise eine der endseitigen Abführleitungen gesperrt und Lösungsmittel auch durch die Zuführungsleitung abgesaugt.To also completely clean the paint supply line, is advantageous at times during each rinsing phase one of the end discharge lines blocked and solvent also sucked off through the feed line.

Wird der Druckbetrieb mit einer neuen Farbe wieder aufgenommen, wird zweckmäßigerweise bei dem Andruck mit neuer Farbe diese für einen vorbestimmten Zeitraum in den Schmutztank gepumpt. Hierdurch wird sichergestellt, daß die neue Farbe nicht noch zu stark mit Resten von Lösungsmittel verdünnt wird. Die in den Schmutztank strömende Farbe läßt sich beobachten, so daß der Abfluß gestoppt werden kann, wenn die im Kreislauf befindliche Farbe von einwandfreier Qualität ist.If printing is resumed with a new color, will be useful when printing with new ink pumped into the dirt tank for a predetermined period of time. Hereby it ensures that the new color is not yet too is heavily diluted with residues of solvent. The in the Dirt tank pouring paint can be observed, so that the drain can be stopped when the color in circulation is of impeccable quality.

Nach einer bevorzugten Ausführungsform der Erfindung ist vorgesehen, daß während des Abpumpens der Farbe aus der Farbkammer die Farbauftragswalze mit einer gegenüber dem Druckbetrieb geringeren Weiterlaufdrehzahl angetrieben wird. According to a preferred embodiment of the invention, that while the ink is being pumped out of the ink chamber Ink application roller with a lower one compared to printing Continued speed is driven.

Zur Erhöhung des Reinigungseffekt ist nach einer weiteren vorteilhaften Ausgestaltung der Erfindung vorgesehen, daß während der Spülphasen die Farbauftragswalze mit einer gegenüber dem Druckbetrieb höheren Drehzahl angetrieben wird. Diese höhere Drehzahl verursacht höhere die Reinigung begünstigende Turbolenzen.To increase the cleaning effect, another is advantageous Embodiment of the invention provided that during the rinse phases the inking roller with one opposite Printing operation is driven at higher speed. This higher Speed causes higher turbulences that favor cleaning.

Zweckmäßigerweise wird während der Spülphase die Drehrichtung der Farbauftragswalze einmal oder mehrmals umgekehrt.The direction of rotation is expedient during the rinsing phase the inking roller one or more times reversed.

Ein Ausführungsbeispiel der Erfindung wird nachstehend anhand der Zeichnung, in deren einziger Figur die erfindungsgemäße Vorrichtung zur Reinigung einer Rakelvorrichtung schematisch dargestellt ist, näher erläutert.An embodiment of the invention is described below the drawing, in its single figure the device according to the invention schematically shown for cleaning a doctor device is explained in more detail.

Aus der Zeichnung ist ein Druckwerk 1 ersichtlich, das aus einem Gegendruckzylinder 2, einer an diesen anstellbaren Druckwalze 3 und einer an die Druckwalze anstellbaren Rasterwalze 4 besteht. An die Rasterwalze 4 ist ein Rakelmesserträger 5 anstellbar, der aus einer Profilleiste besteht. Die Leiste des Rakelmesserträgers 5 ist mit einer den Farbkammerinnenraum bildenden Rinne versehen. In diese Rinne mündet im mittleren Bereich eine die Druckfarbe zuführende Bohrung 6. In den unteren Endbereichen der Rinne befinden sich die Druckfarbe abführende Bohrungen 7, 8.From the drawing, a printing unit 1 can be seen, which consists of a Impression cylinder 2, a pressure roller 3 that can be set on it and an anilox roller 4 which can be set on the printing roller. On the anilox roller 4, a doctor blade carrier 5 is adjustable, the consists of a profile bar. The bar of the doctor blade holder 5 is provided with a groove forming the interior of the ink chamber. The printing ink flows into this channel in the middle area feeding hole 6. In the lower end areas of the channel there are holes 7, 8 for removing the ink.

Die Stirnseiten der Rinnenränder des Rakelmesserträgers sind gegensinnig dachförmig abgeschrägt. Auf diesen Stirnflächen sind Rakelmesser befestigt, die schabend bzw. streichend an die Rasterwalze 3 anstellbar sind. An den Seiten des Rakelmesserträgers sind Dichtungen angeordnet, die den Farbkammerinnenraum gegenüber der Rasterwalze 4 abdichten.The end faces of the channel edges of the doctor blade carrier are in opposite directions sloping roof-shaped. Are on these end faces Doctor knife attached, the dingy or brushing on the anilox roller 3 are adjustable. On the sides of the doctor blade holder seals are arranged opposite the interior of the ink chamber seal the anilox roller 4.

Rakelvorrichtungen dieser Art sind beispielsweise aus den deutschen Patentanmeldungen 195 16 223.4 und 195 16 224.2 bekannt, auf die zur näheren Beschreibung der Rakelvorrichtung Bezug genommen wird.Doctor devices of this type are, for example, from the German Patent applications 195 16 223.4 and 195 16 224.2 known to which reference is made for a more detailed description of the doctor device becomes.

Die Zuführungsbohrung 6 in der Profilleiste des Rakelmesserträgers 5 ist durch eine Leitung 10 mit der Druckseite einer Pumpe 11, bei der es sich bevorzugt um eine Kolbenpumpe handelt, verbunden. Die Saugseite der Pumpe 11 ist durch eine Leitung 12 mit einer weiteren Pumpe 13 verbunden, deren Saugrohr in einen Lösungsmitteltank 14 ragt.The feed hole 6 in the profile bar of the doctor blade carrier 5 is through a line 10 to the pressure side of a pump 11, which is preferably a piston pump, connected. The suction side of the pump 11 is connected through a line 12 connected to a further pump 13, the suction pipe in a solvent tank 14 protrudes.

Die Bohrungen 7, 8 sind durch Leitungen 15, 16 mit den Saugseiten von miteinander gekuppelten Pumpen 17 verbunden. Die Druckseiten der Pumpen 17 sind über Ventile 18, 19 wahlweise mit einer Leitung 20, die in den Farbtank 21 mündet, und mit der Leitung 22 verbindbar, die in den Schmutztank 23 mündet.The holes 7, 8 are through lines 15, 16 with the suction sides connected by pumps 17 coupled together. The printed pages the pumps 17 are optionally via valves 18, 19 a line 20, which opens into the ink tank 21, and with the line 22 connectable, which opens into the dirt tank 23.

In der Leitung 12 ist ein Sperrventil 24 angeordnet.A check valve 24 is arranged in line 12.

Der zwischen dem Sperrventil 24 und der Saugseite der Pumpe 11 befindliche Abschnitt der Leitung 12 ist über eine Leitung 25 mit dem Ventil 26 verbindbar, über das die Saugseite der Pumpe 11 mit dem in den Farbtank 21 ragenden Saugrohr 27 verbindbar ist.The between the check valve 24 and the suction side of the pump 11 located section of line 12 is via line 25 connectable to the valve 26 through which the suction side of the pump 11 can be connected to the suction pipe 27 projecting into the ink tank 21 is.

Die Rückflußleitungen 15, 16 sind durch eine Leitung 30 miteinander verbunden. In der Zuführungsleitung 10 ist ein Ventil 31 angeordnet, durch das die Leitung 10 wahlweise auf die Bohrung 6 oder die Leitung 30 umstellbar ist.The return lines 15, 16 are connected to one another by a line 30 connected. A valve 31 is arranged in the feed line 10, through which the line 10 optionally on the bore 6th or the line 30 is convertible.

In der Rückflußleitung 15 ist ein Ventil 32 angeordnet, durch das die Druckseite der Pumpe 11 mit der Saugseite der Pumpe 17 verbindbar ist.In the return line 15, a valve 32 is arranged through that the pressure side of the pump 11 with the suction side of the pump 17th is connectable.

Durch die Ventile 18, 26 sind die Druckseiten der Ventile 17 mit der Saugseite des Ventils 11 verbindbar.Through the valves 18, 26, the pressure sides of the valves 17 are included the suction side of the valve 11 connectable.

Bei den Ventilen 18, 19, 26, 31 und 32 handelt es sich um steuerbare Wegeventile, beispielsweise um Magnetventile. Auch das Sperrventil 24 ist von Ferne steuerbar.The valves 18, 19, 26, 31 and 32 are controllable Directional control valves, for example around solenoid valves. That too Check valve 24 is remotely controllable.

Die Ventile und Pumpen werden durch eine nicht dargestellte Steuereinrichtung mit einem Rechner angesteuert, so daß die Pumpen und Ventile nach vorgegebenen Programmen betätigt werden können.The valves and pumps are operated by a control device, not shown controlled with a computer so that the pumps and valves can be operated according to predetermined programs.

Typische Zustände der Pumpen und Ventile während des Betriebes und der Spülphasen werden nachstehend näher erläutert:

  • 1. Druckbetrieb
       Während des Druckbetriebes ist das Sperrventil 24 gesperrt und die Pumpe 11 ist über das Wegeventil 26 mit dem Saugrohr 27 verbunden, so daß sie aus dem Farbtank 21 Farbe über die Leitung 10 und das Ventil 31 über die Zuführungsbohrung 6 in die Farbkammer fördert. Aus der Farbkammer werden über die Abführleitungen 15, 16, die Pumpen 17 und die Wegeventile 18, 19 die Druckfarbe über die Leitung 20 in den Farbtank 21 zurückgepumpt.
  • 2. Beispielsweise zur Vorbereitung eines Wechsels der Druckfarbe wird diese aus dem Kreislauf zurück in den Farbtank 21 gepumpt. Hierzu wird die Pumpe 11 stillgesetzt und die Pumpen 17 fördern über die Wegeventile 32, 18 und 19 sowie die Leitung 20 die Druckfarbe zurück in den Farbtank 21. Während dieser Abpumpphase, die beispielsweise etwa fünf Sekunden dauern kann, wird die Rasterwalze 4 mit einer Weiterlaufdrehzahl angetrieben, die geringer ist als deren Drehzahl während des Druckbetriebes.
  • 3. Nach dem Abpumpen der Druckfarbe wird die erste Spülphase eingeleitet. Hierzu wird das Sperrventil 24 geöffnet und über die Pumpen 11 und 13 wird die Zuführungsleitung 10 und das Wegeventil 31 durch die Bohrung 6 das Lösungsmittel in die Farbkammer gepumpt, das über die Leitungen 15, 16, die Pumpen 17 und die Ventile 18, 19 und die Leitung 20 in den Farbtank 21 geleitet wird. Während dieser ersten Spülphase wird die Rasterwalze 4 mit einer Drehzahl angetrieben, die höher ist als die Drehzahl während des Druckbetriebes. Nach beispielsweise etwa fünf Sekunden wird diese erste Spülphase unterbrochen und die Einleitung des stark mit Druckfarbe angereicherten Lösungsmittels in den Farbtank 21 gestoppt.
  • 4. In der nun folgenden Spülphase wird weiter über die Pumpen 11, 13 frisches Lösungsmittel aus dem Lösungsmitteltank 14 in die Farbkammer gepumpt, die Wegeventile 18, 19 sind jedoch so umgestellt worden, daß das mit Druckfarbe angereicherte Lösungsmittel über die Leitung 22 in den Schmutztank 23 geleitet wird. Nach etwa fünf Sekunden, während der die Rasterwalze ebenfalls mit hoher Drehzahl umläuft, wird diese zweite Spülphase beendet. Hierzu wird das Wegeventil 24 gesperrt und die Pumpe 11 abgestellt. Das noch im Kreislauf befindliche Lösungsmittel wird über die Pumpen 17, die Ventile 18, 19 und die Leitung 22 in den Schmutztank 23 gepumpt. Auch während dieser Abpumpphase, die etwa drei Sekunden dauern kann, wird die Rasterwalze mit hoher Geschwindigkeit angetrieben.
  • 5. Zur Vorbereitung der nun folgenden Intensivspülung wird das Sperrventil 24 wieder geöffnet und die Pumpen 11, 13 fördern über die Leitung 10 und das Wegeventil 31 frisches Lösungsmittel in die Farbkammer. Nach der Füllung der Farbkammer mit frischem Lösungsmittel wird das Sperrventil 24 geschlossen und die Ventile 18, 26 werden derart geschaltet, daß die Druckseiten der Pumpen 17 mit der Saugseite der Pumpe 11 verbunden sind. Durch die Pumpen 11, 17 wird nun das Lösungsmittel zur Intensivspülung derart im Kreislauf geführt, daß es durch die Leitung 10, das Ventil 31 und die Bohrung 6 in die Farbkammer eingeleitet und durch die Rückführleitungen 15, 16 wieder abgesaugt wird. Während dieser Intensivspülung wird die Rasterwalze 4 mit hoher Geschwindigkeit angetrieben. Die Drehrichtung der Rasterwalze kann beispielsweise jeweils nach etwa fünfzehn Sekunden umgekehrt werden, so daß eine besonders intensive Spülung erreichbar ist. Die Füllung der Farbkammer vor der Intensivspülung mit Lösungsmittel kann durch die Anzahl der Hübe der Pumpe 11 bemessen werden. Der Füllvorgang kann beispielsweise etwa fünf Sekunden dauern. Die Intensivspülphase, während der das Reinigungsmittel im Kreislauf geführt wird, kann etwa sechzig Sekunden dauern, wobei die Drehrichtung der Rakel zweckmäßigerweise jeweils nach fünfzehn Sekunden umgekehrt wird.Um während der Intensivspülphase auch eine Reinigung des Leitungsabschnitts zwischen der Druckseite der Pumpe 11 und dem Wegeventil 32 zu erreichen, kann durch das Wegeventil 32 die Druckseite der Pumpe 11 kurzzeitig mit der Saugseite der Pumpe 17 verbunden werden.
  • 6. Zur Intensivspülung der Rückführleitungen 15, 16 wird die Zuführungsleitung 10 über das Wegeventil 31 auf die Leitung 30 geschaltet, so daß eine Spülung der Rückführleitungen 15, 16 in einem verkürzten Kreislauf erfolgt.
  • 7. Um beim Abpumpen der Farbe auch die Zuführungsleitung 10 leer zu pumpen, wird bei stillstehender Pumpe 11 die Zuführungsleitung 10 über das Wegeventil 32 auf die Saugseite der Pumpe 17 geschaltet. In entsprechender Weise kann während der Spülphasen die Leitung 10 im Gegenstrom freigespült werden.
  • 8. Nach Beendigung der Intensivspülung wird das Lösungsmittel aus dem Kreislauf bei abgesperrtem Sperrventil 24 und stillstehender Pumpe 11 über die Pumpen 17, die Ventile 18, 19 und die Leitung 22 in den Schmutztank 23 gepumpt.
  • 9. Beim Andrücken mit einer neuen Farbe saugt die Pumpe 11 über das Wegeventil 26 die Farbe aus dem Farbtank 21 an. Während der ersten Phase des Andrückens wird die über die Leitungen 15, 16 zurückfließende Farbe über die Pumpen 17 bei entsprechender Stellung der Wegeventile 18, 19 und die Leitung 22 zunächst in den Schmutztank 23 geleitet, bis diese hinreichend lösungsmittelfrei ist. Sodann werden die Wegeventile 18, 19 in der Weise umgestellt, daß sich der Farbkreislauf während des üblichen Druckbetriebes einstellt.
    • Typical states of the pumps and valves during operation and the rinsing phases are explained in more detail below:
  • 1. Printing operation
    During the printing operation, the check valve 24 is blocked and the pump 11 is connected via the directional control valve 26 to the suction pipe 27, so that it conveys paint from the ink tank 21 via the line 10 and the valve 31 via the feed bore 6 into the ink chamber. The printing ink is pumped back into the ink tank 21 from the ink chamber via the discharge lines 15, 16, the pumps 17 and the directional control valves 18, 19.
  • 2. For example, in preparation for a change of the printing ink, this is pumped out of the circuit back into the ink tank 21. For this purpose, the pump 11 is stopped and the pumps 17 convey the printing ink back into the ink tank 21 via the directional valves 32, 18 and 19 and the line 20 driven, which is less than their speed during printing.
  • 3. After the ink has been pumped out, the first rinsing phase is initiated. For this purpose, the shut-off valve 24 is opened and, via the pumps 11 and 13, the feed line 10 and the directional control valve 31, the solvent is pumped through the bore 6 into the ink chamber, which is supplied via the lines 15, 16, the pumps 17 and the valves 18, 19 and the line 20 is passed into the ink tank 21. During this first rinsing phase, the anilox roller 4 is driven at a speed that is higher than the speed during the printing operation. After about five seconds, for example, this first rinsing phase is interrupted and the introduction of the solvent, which is heavily enriched with printing ink, into the ink tank 21 is stopped.
  • 4. In the rinsing phase that now follows, pumps 11, 13 continue to pump fresh solvent from the solvent tank 14 into the ink chamber, but the directional control valves 18, 19 have been changed over so that the solvent enriched with printing ink is fed via line 22 into the dirt tank 23 is directed. This second rinsing phase ends after about five seconds, during which the anilox roller also rotates at high speed. For this purpose, the directional control valve 24 is blocked and the pump 11 is switched off. The solvent still in circulation is pumped into the dirt tank 23 via the pumps 17, the valves 18, 19 and the line 22. The anilox roller is also driven at high speed during this pumping-out phase, which can take about three seconds.
  • 5. In preparation for the following intensive rinsing, the shut-off valve 24 is opened again and the pumps 11, 13 convey fresh solvent into the ink chamber via the line 10 and the directional control valve 31. After the ink chamber has been filled with fresh solvent, the shut-off valve 24 is closed and the valves 18, 26 are switched such that the pressure sides of the pumps 17 are connected to the suction side of the pump 11. The pumps 11, 17 now circulate the solvent for intensive rinsing in such a way that it is introduced through the line 10, the valve 31 and the bore 6 into the paint chamber and is sucked off again through the return lines 15, 16. During this intensive rinsing, the anilox roller 4 is driven at high speed. The direction of rotation of the anilox roller can, for example, be reversed after about fifteen seconds, so that particularly intensive rinsing can be achieved. The filling of the ink chamber before the intensive rinsing with solvent can be measured by the number of strokes of the pump 11. The filling process can take about five seconds, for example. The intensive rinsing phase, during which the cleaning agent is circulated, can last for about sixty seconds, the direction of rotation of the doctor blade being expediently reversed every fifteen seconds To achieve, the pressure side of the pump 11 can be briefly connected to the suction side of the pump 17 by the directional valve 32.
  • 6. For intensive flushing of the return lines 15, 16, the feed line 10 is switched to the line 30 via the directional control valve 31, so that the return lines 15, 16 are flushed in a shortened circuit.
  • 7. In order to also pump the feed line 10 empty when the paint is being pumped out, the feed line 10 is switched to the suction side of the pump 17 via the directional control valve 32 when the pump 11 is at a standstill. In a corresponding manner, the line 10 can be flushed out in countercurrent during the flushing phases.
  • 8. After completion of the intensive rinsing, the solvent is pumped out of the circuit with the shut-off valve 24 and the pump 11 at a standstill via the pumps 17, the valves 18, 19 and the line 22 into the dirt tank 23.
  • 9. When pressed with a new paint, the pump 11 draws in the paint from the paint tank 21 via the directional valve 26. During the first phase of the pressing, the paint flowing back via the lines 15, 16 is first passed into the dirt tank 23 via the pumps 17 with the corresponding position of the directional control valves 18, 19 and line 22 until the latter is sufficiently solvent-free. Then the directional control valves 18, 19 are changed over in such a way that the color cycle is established during normal printing operation.

    • Claims (7)

    1. Method for cleaning a doctor device for a fountain-type inking unit of a rotary printing machine, the said device comprising a doctor-blade carrier (5) which is provided with a channel extending longitudinally and to which there are fastened, parallel to each other, two doctor blades which can be set in relation to an ink applicator roll (4) and which, together with the ink applicator roll (4), the channel of the doctor-blade carrier and sealing means provided at the ends of the latter, bound an inking chamber, the said device also comprising lines (10, 15, 16) for feeding ink into the inking chamber and discharging it from the latter, and comprising setting devices for pressing the doctor-blade carrier (5) onto the ink applicator roll (49),
      in which method, after the ink has been pumped out of the inking chamber, the latter is washed with a solvent,
      characterized
      in that the ink from the inking chamber is pumped back into the ink tank (21) via the discharge line or lines, in that solvent is then pumped into the inking chamber from a solvent tank (14) via the feed line (12, 10) or lines and is led into the ink tank (21) via the discharge lines (15, 16, 20) for a predetermined period of time,
      in that the solvent still contaminated by ink is then pumped into a dirt tank (23) for a predetermined period of time,
      in that the feed of solvent from the solvent tank (14) is then interrupted and the solvent is pumped into the dirt tank (23),
      in that fresh solvent is then pumped into the inking chamber via the feed line (12, 10), the suction line (12) to the solvent tank (14) is closed and the solvent is pumped in a closed washing circuit via the feed (10) and discharge lines (15, 16) for a predetermined period of time, and
      in that the solvent carried in the circuit is then led into the dirt tank (23).
    2. Method according to Claim 1, characterized in that the ink is fed to the inking chamber through a feed line (10) located at the centre of the chamber, and is extracted from the said chamber by discharge lines at the sides.
    3. Method according to Claim 1 or 2, characterized in that during each washing phase, one of the discharge lines (15, 16) at the ends is shut off from time to time, and the solvent is also extracted through the feed line (10).
    4. Method according to one of Claims 1-3, characterized in that while the ink is being pumped out of the inking chamber, the ink applicator roll (4) is driven at a continuing rotational speed which is lower than that during printing operation.
    5. Method according to one of Claims 1-4, characterized in that during the washing phases, the ink applicator roll (4) is driven at a rotational speed which is higher than that during printing operation.
    6. Method according to Claim 5, characterized in that during the washing phases, the direction of rotation of the ink applicator roll (4), which is driven at a high rotational speed, is reversed once or several times.
    7. Method according to one of Claims 1-6, characterized in that when printing is started with a new ink, the latter is pumped into the dirt tank (23) for a predetermined period of time.
    EP96118005A 1995-12-22 1996-11-09 Method and means for cleaning the squeegee device of the inking unit of a rotary printing machine Expired - Lifetime EP0780228B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE19548535 1995-12-22
    DE19548535A DE19548535C2 (en) 1995-12-22 1995-12-22 Method and device for cleaning a doctor blade device for a rinsing inking unit of a rotary printing press

    Publications (2)

    Publication Number Publication Date
    EP0780228A1 EP0780228A1 (en) 1997-06-25
    EP0780228B1 true EP0780228B1 (en) 2000-04-19

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    Application Number Title Priority Date Filing Date
    EP96118005A Expired - Lifetime EP0780228B1 (en) 1995-12-22 1996-11-09 Method and means for cleaning the squeegee device of the inking unit of a rotary printing machine

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    US (1) US5816163A (en)
    EP (1) EP0780228B1 (en)
    JP (1) JP4021510B2 (en)
    KR (1) KR100231073B1 (en)
    CN (1) CN1078533C (en)
    BR (1) BR9606131A (en)
    CZ (1) CZ290997B6 (en)
    DE (2) DE19548535C2 (en)
    ES (1) ES2145363T3 (en)
    IN (1) IN189907B (en)
    TW (1) TW410748U (en)

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    DE102008042460A1 (en) 2008-09-29 2010-04-08 Windmöller & Hölscher Kg Apparatus and method for supplying a printing or printing unit of a printing press with printing ink or another liquid

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    US6383296B1 (en) * 1999-11-22 2002-05-07 Harris & Bruno Machine Co. Chambered doctor blade with automatic cleanup and ink replacement
    US6576059B2 (en) * 1999-11-22 2003-06-10 Harris & Bruno Company, Inc. Chambered doctor blade system for water-based and UV-based coatings
    EP1197333B1 (en) * 2000-10-13 2006-03-01 Fischer & Krecke GmbH & Co. Flexographic printing press with a washing device for the impression cylinder
    ITGE20020033A1 (en) * 2002-04-24 2003-10-24 Schiavi Spa AUTOMATIC WASHING METHOD OF THE INKING CIRCUIT IN ROTARY PRINTING MACHINES, AND PLANT FOR IMPLEMENTING THE METHOD
    DE10225681B4 (en) * 2002-06-10 2010-02-04 Windmöller & Hölscher Kg Method and device for supplying and removing printing ink to and from a squeegee device of an inking unit of a rotary printing press and / or for cleaning the squeegee device
    DE10252013B4 (en) * 2002-11-06 2008-01-17 Windmöller & Hölscher Kg Cleaning of rollers in printing machines
    WO2004045854A2 (en) * 2002-11-15 2004-06-03 Graymills Corporation System and method for delivering and flushing ink and other liquids in a printing press
    JP4002859B2 (en) * 2002-12-27 2007-11-07 株式会社イソワ Ink removal / recovery device, printing machine equipped with the device, and ink supply / recovery method
    DE20302462U1 (en) * 2003-02-15 2003-04-17 Roland Man Druckmasch Washing device for printing and / or coating units in a processing machine
    DK176343B1 (en) * 2004-03-19 2007-09-03 Tresu Anlaeg As Process and system for cleaning a color chamber's color chamber and cleaning nozzle for use in such a system
    CN100485417C (en) * 2004-08-25 2009-05-06 谢方山 Multi-parameter collecting system and long-distance monitoring system utilizing the same system
    CN101623952B (en) * 2009-08-05 2011-02-16 许永久 Double-water washing device of ink roller of offset printing machine
    DE102009046078A1 (en) * 2009-10-28 2011-05-05 Koenig & Bauer Aktiengesellschaft Device for pressure adjustment in a chambered doctor blade
    JP5529497B2 (en) * 2009-11-05 2014-06-25 三菱重工印刷紙工機械株式会社 Ink cleaning method and apparatus for flexographic printing machine
    DE102011012891A1 (en) * 2010-03-29 2011-09-29 Heidelberger Druckmaschinen Ag Rotary printing unit for sheet-processing rotary printing machine for lithographic offset printing, has suction device brought into working position, where suction device sucks liquid from rotating surface of printing form cylinder
    EP2559555B1 (en) 2011-08-15 2016-09-07 Komori Corporation Wiping device
    ES2431894B1 (en) * 2012-04-26 2014-09-03 Comexi Group Industries, Sau System for applying printing liquid or printing aid to a gravure roller
    DE102012103848A1 (en) * 2012-05-02 2013-11-07 Windmöller & Hölscher Kg mixing device
    DE102012103851A1 (en) 2012-05-02 2013-11-21 Windmöller & Hölscher Kg Method for cleaning a color system of a rotary printing press and color system
    DE102012103850B3 (en) 2012-05-02 2013-07-25 Windmöller & Hölscher Kg Device for setting an operating parameter of a color for a printing process of a rotary printing machine and method for this purpose
    JP5903542B2 (en) * 2012-05-07 2016-04-13 パナソニックＩｐマネジメント株式会社 Screen printing device
    CN102991097B (en) * 2012-11-23 2015-09-16 辽宁超烁图码科技板业有限公司 A kind of intaglio press
    KR101762858B1 (en) 2015-06-30 2017-07-31 건국대학교 산학협력단 Gravure printing apparatus
    WO2018077380A1 (en) * 2016-10-25 2018-05-03 Hp Indigo B.V. Transferring print agent in print apparatus
    WO2020100396A1 (en) * 2018-11-16 2020-05-22 アイマー・プランニング株式会社 Water fountain contamination prevention device for offset printing machine
    CN113352749A (en) * 2021-06-16 2021-09-07 陕西北人印刷机械有限责任公司 Method for controlling cleaning ink path of CI (computer interface) flexographic printing equipment

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    DE102008042460A1 (en) 2008-09-29 2010-04-08 Windmöller & Hölscher Kg Apparatus and method for supplying a printing or printing unit of a printing press with printing ink or another liquid

    Also Published As

    Publication number Publication date
    KR100231073B1 (en) 1999-11-15
    US5816163A (en) 1998-10-06
    DE59604997D1 (en) 2000-05-25
    CZ334396A3 (en) 1997-06-11
    KR970033850A (en) 1997-07-22
    ES2145363T3 (en) 2000-07-01
    JPH09187918A (en) 1997-07-22
    BR9606131A (en) 1998-11-03
    CN1160639A (en) 1997-10-01
    DE19548535C2 (en) 1999-12-30
    CN1078533C (en) 2002-01-30
    EP0780228A1 (en) 1997-06-25
    DE19548535A1 (en) 1997-07-03
    TW410748U (en) 2000-11-01
    JP4021510B2 (en) 2007-12-12
    IN189907B (en) 2003-05-10
    CZ290997B6 (en) 2002-11-13

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