EP0858891B1 - Method and apparatus for cleaning a portion of a printing unit of an offset printing machine - Google Patents

Method and apparatus for cleaning a portion of a printing unit of an offset printing machine Download PDF

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Publication number
EP0858891B1
EP0858891B1 EP98101233A EP98101233A EP0858891B1 EP 0858891 B1 EP0858891 B1 EP 0858891B1 EP 98101233 A EP98101233 A EP 98101233A EP 98101233 A EP98101233 A EP 98101233A EP 0858891 B1 EP0858891 B1 EP 0858891B1
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EP
European Patent Office
Prior art keywords
washing
control
ink
frequency
printing
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EP98101233A
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German (de)
French (fr)
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EP0858891A1 (en
Inventor
Peter Hummel
Robert Ortner
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Manroland AG
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MAN Roland Druckmaschinen AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F35/00—Cleaning arrangements or devices

Definitions

  • the invention relates to a method for automatically controlled Washing at least a part of a printing unit Offset printing machine according to the preamble of claim 1.
  • Another aspect of the invention relates to an arrangement for Carrying out such a method on a washing device, the at least part of a printing unit Offset printing machine is assigned to a control center, according to Claim 5.
  • a blanket Under each part of the printing unit, a blanket, Printing cylinder, an inking unit and possibly a dampening unit Roger that.
  • the dampening system is e.g. with dry offset, not necessarily part of the printing unit.
  • Automatic washing devices are part of the prior art for inking units, blanket and printing cylinders of a printing unit an offset printing machine that requires a quick cleaning of the Enable control center from (brochure of MAN Roland printing presses AG "Roland 700").
  • a washing device can have several washing programs adapted to different production conditions be defined for water and detergent. The washing process is triggered manually from the control center. Although this principle works well, the problem remains how one of the washing programs is optimally activated or activated Washing process is to be initiated.
  • the present invention is based on the object based on a method of the type mentioned at the beginning automatic control of the washing process, in particular the washing frequency, in terms of washing quality and washing time to optimize.
  • This task is automatically controlled by the process Wash with the characteristics of the characteristic part of the Claim 1 solved.
  • This process is based on the knowledge that the degree of contamination of ink and dampening systems, blanket and Printing cylinders significantly with the amount of since the last Washing process applied paint related. It is particularly advantageous that the decisive for the color consumption Characteristics of the color metering from control / feedback signals can be formed precisely when controlling the Offset printing machine are provided anyway, so not specifically to control the washing frequency and / or type of Washing process need to be formed.
  • the generation of the Control signals for a washing device from these available Control / feedback signals is also uncomplicated Funds possible.
  • Spraying and doctoring times on an inking unit and / or dampening unit include, where it can also be controlled whether only rollers the inking and dampening unit can be washed or the Rollers of the inking and dampening unit can be washed.
  • the color consumption and the frequency and / or the type of washing process can be determined, especially expedient the control / feedback signals of a zonal Setting of color metering elements, a color strip width or a lifter cycle used.
  • a method for determining the Consumption of printing ink from an offset printing machine is used as described in detail in EP 0 364 736 B1 is.
  • the zone-wide dosing elements that are close together arranged next to the ink fountain roller or ink roller are the constant stripe length, the therefore does not need to be recorded continuously.
  • the color stripe width as a further parameter for the color consumption depends in a manner known per se from the lifting stroke with which the Color is transferred to a siphon roller, which is the color then feeds an inking roller. From the above Parameters and constants which are determined by the machine, its Setting as well as other specifications, such as those to be processed Materials can depend on the amount consumed Printing ink are determined by the control according to the invention the frequency and type of washing process.
  • the control center of the printing press comprises a signal processing device, the inputs for control / feedback signals a zonal setting of color metering elements, a color stripe width or a lifter stroke and one with has coupled inputs to these inputs.
  • the Signal processing device is set up from the mentioned control / feedback signals signals or data of the amount of ink consumed. These signals / data the amount of ink used is at an exit of the Signal processing device. With this exit is a Input of a function generator coupled in which a function the dependence on the frequency and / or type of washing process of the amount of ink used is stored.
  • the Function generator can be expediently a digital according to claim 6 Be memory in which, in the manner of a list, data of the used Ink quantity, corresponding frequency data and / or the type of washing process are permanently assigned. Signals are generated from the latter data, which are generated by an output of the function generator of a control of the washing devices can be supplied. If the printing unit comprises several washing devices, one of which each Blanket cylinder, the impression cylinder, the dampening unit and the Inking unit is assigned, the washing devices can vary depending Type of washing process individually or combined by the control to be activated.
  • Fig. 1 is a printing unit of a multi-color rotary printing press with a printing cylinder 1 and one in the direction of sheet travel upstream transfer drum 2 shown schematically.
  • Adjacent to the impression cylinder 1 is a blanket cylinder 3, which is in contact with a plate cylinder 4.
  • the Plate cylinders 4 are connected to an inking unit 16 and a dampening unit 17.
  • a washing device 5 is assigned to the blanket cylinder 3.
  • the washing device 5 consists essentially of a e.g. trained as a washing brush washing roller, which in one Housing is rotatably mounted. In the housing are controlled Supply of detergent and water spray devices arranged with a controller 6 of the washing device in a control center 7 are coupled in terms of circuitry.
  • the Washer roller is still connected to a separate drive and is in constant engagement with a squeegee.
  • the washing device 5 is a total of working cylinders on the blanket cylinder employable or detachable from this.
  • the on / off is also from the control 6 in the control room 7 operated, the washing device normally is in the parked position.
  • Another washing device 5a which is formed in a similar manner and can be operated is assigned to the pressure cylinder 1.
  • a washing device 5b is assigned to a roller of the inking unit.
  • the design of this washing device is general known and essentially comprises a color on the roller decreasing scraper or squeegee and a not shown Spray device, with the washing liquid on one of the upper rollers of the inking unit 16 can be sprayed on.
  • the rollers of the dampening unit 17 with the rollers of the inking unit 16 washed.
  • a separate one similar to dampening unit 17 Washer associated with the washer 5b can be controlled separately.
  • the central control center also includes a signal processing device 8, of which an unmarked Output with an input, also not designated Function generator 9 is coupled.
  • An unmarked exit of the function generator is also not designated Input of the control 6 of the washing devices 5, 5a, 5b led, the controller a second conventional input 10 for example for a conventional manual operation of the washing devices 5, 5a, 5b.
  • Output lines the controller 6 are identified by the common reference number 11 Mistake.
  • Inputs of the signal processing device 8 are with lines 12 - 14 connected, the signals according to positions individual color metering devices that act as control signals can be returned to the control center via these lines.
  • the lines that carry the signals for adjusting the color metering devices from the control center to the color metering devices lead are not shown. 1 is, however further a line 15 can be seen which signals from a reports lifting roller (not shown) back to control station 7, which signals also into an input of the signal processing device can be entered.
  • Line 15 leads Signals corresponding to the period of time during which the lifting roller abuts an ink fountain roller, not shown. she can also carry a signal indicating the speed of rotation the ink fountain roller includes to thereby the ink strip width of the ink film transferred from the lifter roller to mark.
  • the color stripe length is by the Dimensions of the ink dosing devices arranged side by side defined and the color layer thickness by the zonal Setting these color metering elements.
  • the signal processing device 8 is designed so that it from the incoming Signals or corresponding data and additional entered constants and variables a signal or data forms, which correspond to the amount of ink used, i.e. contain a parameter for this consumption.
  • the amount of printing ink used is known mathematical relationships calculated in the signal processing device 8 realized by hardware and / or software could be.
  • the signal that can be taken from an output or the corresponding ones Data of the signal processing device thus contain an exact measure of the ink consumption, which in the Function generator 9 is fed.
  • washing device 5b On the inking and printing unit triggers appropriate spraying and doctoring processes there.
  • This Washing processes therefore run depending on the determined Ink consumption from that of other conventional Purposes, e.g. for storing the printing ink can.

Abstract

The method involves a printer which comprises a rubber blanket (3) and printing cylinder (1), an inker unit (16) and a damping system. The offset printer has a control stand (7) containing a signal processor(8) which has inputs for the control/repeat-back signals of a central setting of metering elements, ink-strip width or lifting cycle. The output of the signal processor is connected to the input of a function generator (9) in the form of a digital storage which is itself connected to a control (6) of the washer (5,5a,5b).

Description

Die Erfindung betrifft ein Verfahren zum selbsttätig gesteuerten Waschen wenigstens eines Teiles eines Druckwerkes einer Offsetdruckmaschine nach dem Oberbegriff des Anspruchs 1.The invention relates to a method for automatically controlled Washing at least a part of a printing unit Offset printing machine according to the preamble of claim 1.

Ein weiterer Aspekt der Erfindung betrifft eine Anordnung zur Durchführung eines derartigen Verfahrens an einer Waschvorrichtung, die wenigstens einem Teil eines Druckwerkes einer Offsetdruckmaschine mit einem Leitstand zugeordnet ist, gemäß Anspruch 5.Another aspect of the invention relates to an arrangement for Carrying out such a method on a washing device, the at least part of a printing unit Offset printing machine is assigned to a control center, according to Claim 5.

Unter einem Teil des Druckwerkes wird jeweils ein Gummituch-, Druckzylinder, ein Farbwerk und gegebenenfalls ein Feuchtwerk verstanden. Das Feuchtwerk ist, z.B. bei Trockenoffset, nicht notwendigerweise Teil des Druckwerks.Under each part of the printing unit, a blanket, Printing cylinder, an inking unit and possibly a dampening unit Roger that. The dampening system is e.g. with dry offset, not necessarily part of the printing unit.

Zum Stand der Technik gehören automatische Waschvorrichtungen für Farbwerke, Gummituch- und Druckzylinder eines Druckwerkes einer Offsetdruckmaschine, die eine rasche Reinigung von dem Leitstand aus ermöglichen (Prospekt der MAN Roland Druckmaschinen AG "Roland 700"). Mit einer solchen Waschvorrichtung können mehrere Waschprogramme angepaßt an verschiedene Produktionsbedingungen für Wasser und Waschmittel definiert werden. Der Waschvorgang wird manuell vom Leitstand aus ausgelöst. Obwohl dieses Prinzip gut funktioniert, bleibt das Problem, wie eines der Waschprogramme optimal aktiviert wird bzw. ein Waschvorgang einzuleiten ist.Automatic washing devices are part of the prior art for inking units, blanket and printing cylinders of a printing unit an offset printing machine that requires a quick cleaning of the Enable control center from (brochure of MAN Roland printing presses AG "Roland 700"). With such a washing device can have several washing programs adapted to different production conditions be defined for water and detergent. The washing process is triggered manually from the control center. Although this principle works well, the problem remains how one of the washing programs is optimally activated or activated Washing process is to be initiated.

Weiterhin wurden bereits ein Verfahren und eine Anordnung zum Reinigen von Zylindern einer Rotationsdruckmaschine vorgeschlagen, die eine gesteuerte Waschmittelzufuhr ermöglichen, um stets einen annähernd gleichen Feuchtigkeitsgrad bei einer Waschwalze oder einem Waschtuch bei Waschbeginn zu gewährleisten (DE 44 43 357). Hierzu sollen zu Beginn eines Waschvorgangs die zwischen einem vorangegangenen Waschvorgang liegende Zeit und die Anzahl der vorher bedruckten Bogen ermittelt werden und in Abhängigkeit von dem Ergebnis die Menge des Reinigungsfluids - Waschmittel und Wasser - gesteuert der Waschvorrichtung zugeführt werden. In gleicher Abhängigkeit wird die Anzahl der Waschvorgänge gesteuert. Diese Steuerung hat sich als noch verbesserungswürdig herausgestellt.Furthermore, a method and an arrangement for Cleaning cylinders of a rotary printing press proposed which enable controlled detergent supply, to always have approximately the same degree of moisture in one Ensure washing roller or a washcloth at the start of washing (DE 44 43 357). This should be done at the beginning of a washing cycle the one lying between a previous washing process Time and the number of previously printed sheets determined and depending on the result the amount of Cleaning fluids - detergent and water - controlled the Washing device are supplied. In the same dependency the number of washes is controlled. This control has turned out to be in need of improvement.

Bei einem anderen vorgeschlagenen Verfahren und einer entsprechenden Anordnung zur Reinigung eines Zylinders einer Rotationsdruckmaschine mit einer an dem Zylinder an- und abstellbaren Waschvorrichtung, deren Waschwalze oder Waschtuch mit dem Reinigungsfluid besprühbar sind, wird die Waschmittelzuführung auf der Zylindermantelfläche unter Berücksichtigung der Drehzahl und Drehrichtung des zu reinigenden Zylinders gesteuert (DE 44 43 356). Auch dieses Verfahren hat sich als noch verbesserungsfähig erwiesen.In another proposed method and a corresponding one Arrangement for cleaning a cylinder of a rotary printing press with one that can be switched on and off on the cylinder Washing device, its washing roller or washcloth with can be sprayed onto the cleaning fluid, the detergent supply on the cylinder surface taking into account the speed and direction of rotation of the cylinder to be cleaned controlled (DE 44 43 356). This procedure has also proven to be proven to be still subject to improvement.

Demgemäß liegt der vorliegenden Erfindung die Aufgabe zugrunde, ausgehend von einem Verfahren der eingangs genannten Gattung die automatische Steuerung des Waschvorgangs, insbesondere der Waschhäufigkeit, hinsichtlich Waschqualität und Waschzeit zu optimieren.Accordingly, the present invention is based on the object based on a method of the type mentioned at the beginning automatic control of the washing process, in particular the washing frequency, in terms of washing quality and washing time to optimize.

Diese Aufgabe wird durch das Verfahren zum selbsttätig gesteuerten Waschen mit den Merkmalen des kennzeichnenden Teils des Anspruchs 1 gelöst.This task is automatically controlled by the process Wash with the characteristics of the characteristic part of the Claim 1 solved.

Diesem Verfahren liegt die Erkenntnis zugrunde, daß der Verschmutzungsgrad von Farb- und Feuchtwerk, Gummituch- und Druckzylinder maßgeblich mit der Menge der seit dem letzten Waschvorgang aufgetragenen Farbe zusammenhängt. Dabei ist besonders vorteilhaft, daß die für den Farbverbrauch maßgeblichen Kenngrößen der Farbdosierung aus Steuer-/Rückmeldesignalen genau gebildet werden können, die bei der Steuerung der Offsetdruckmaschine ohnehin vorgesehen sind, also nicht speziell zur Steuerung der Waschhäufigkeit und/oder Art des Waschvorgangs gebildet zu werden brauchen. Die Erzeugung der Steuersignale für eine Waschvorrichtung aus diesen vorhandenen Steuer-/Rückmeldesignalen ist ebenfalls mit unkomplizierten Mitteln möglich. - Die Steuerung der Häufigkeit und/oder Art des Waschvorgangs kann beispielsweise eine Steuerung von Sprüh- und Rakelzeiten an einem Farbwerk und/oder Feuchtwerk beinhalten, wobei auch gesteuert werden kann, ob nur Walzen des Farb- und Feuchtwerkes gewaschen werden oder aber die Walzen des Farb- und Feuchtwerkes gewaschen werden.This process is based on the knowledge that the degree of contamination of ink and dampening systems, blanket and Printing cylinders significantly with the amount of since the last Washing process applied paint related. It is particularly advantageous that the decisive for the color consumption Characteristics of the color metering from control / feedback signals can be formed precisely when controlling the Offset printing machine are provided anyway, so not specifically to control the washing frequency and / or type of Washing process need to be formed. The generation of the Control signals for a washing device from these available Control / feedback signals is also uncomplicated Funds possible. - Controlling the frequency and / or type the washing process can be controlled by, for example Spraying and doctoring times on an inking unit and / or dampening unit include, where it can also be controlled whether only rollers the inking and dampening unit can be washed or the Rollers of the inking and dampening unit can be washed.

Im einzelnen werden gemäß Anspruch 2 als Kenngrößen, nach deren Maßgabe der Farbverbrauch und daraus die Häufigkeit und/oder Art des Waschvorgangs bestimmt werden, besonders zweckmäßig die Steuerungs-/Rückmeldesignale einer zonalen Einstellung von Farbdosierelementen, einer Farbstreifenbreite bzw. eines Hebertakts verwendet.In particular, according to claim 2 as parameters, according to their stipulation is the color consumption and the frequency and / or the type of washing process can be determined, especially expedient the control / feedback signals of a zonal Setting of color metering elements, a color strip width or a lifter cycle used.

Dazu kann beispielsweise ein Verfahren zur Bestimmung des Verbrauchs von Druckfarbe einer Offsetdruckmaschine herangezogen werden, wie es im einzelnen in der EP 0 364 736 B1 beschrieben ist. Dabei werden anhand der Einstellung der Dosierelemente, welche die Farbspaltöffnungen an einem Farbkasten bestimmen, die Farbschichtdicken in den einzelnen Zonen ermittelt. Die zonenbreiten Dosierelemente, die dicht nebeneinander neben der Farbkastenwalze oder Farbduktorwalze angeordnet sind, ergeben dabei die konstante Farbstreifenlänge, die somit nicht ständig erfaßt zu werden braucht. Die Farbstreifenbreite als weiterer Parameter für den Farbverbrauch hängt in an sich bekannter Weise von dem Hebertakt ab, mit dem die Farbe auf eine Heberwalze übertragen wird, welche die Farbe anschließend einer Farbwerkswalze zuführt. Aus den genannten Parametern und Konstanten, welche von der Maschine, deren Einstellung sowie von anderen Vorgaben, wie den zu verarbeitenden Materialien abhängen, kann die Menge der verbrauchten Druckfarbe bestimmt werden, von der erfindungsgemäß die Steuerung der Häufigkeit und der Art des Waschvorgangs ausgeht. For this purpose, for example, a method for determining the Consumption of printing ink from an offset printing machine is used as described in detail in EP 0 364 736 B1 is. Based on the setting of the dosing elements, which the color stomata on a paint box determine the color layer thicknesses in the individual zones. The zone-wide dosing elements that are close together arranged next to the ink fountain roller or ink roller are the constant stripe length, the therefore does not need to be recorded continuously. The color stripe width as a further parameter for the color consumption depends in a manner known per se from the lifting stroke with which the Color is transferred to a siphon roller, which is the color then feeds an inking roller. From the above Parameters and constants which are determined by the machine, its Setting as well as other specifications, such as those to be processed Materials can depend on the amount consumed Printing ink are determined by the control according to the invention the frequency and type of washing process.

Daraus kann gemäß Anspruch 3 die Funktion der Häufigkeit und/oder Art des Waschvorgang als Wertevorrat in Abhängigkeit von dem Farbverbrauch empirisch bestimmt werden und der zukünftigen Steuerung der Häufigkeit und/oder Art des Waschvorgangs in Abhängigkeit von dem jeweiligen Farbverbrauch zugrundegelegt werden.From this, the function of frequency and / or Type of washing process as a stock of values depending on the color consumption will be determined empirically and the future Control the frequency and / or type of washing in Dependent on the respective color consumption become.

Es ist aber stattdessen auch möglich, die Einflußgrößen, welche in die Funktion der Häufigkeit und/oder Art des Waschvorgangs in Abhängigkeit von dem Farbverbrauch eingehen, durch Analyse der einzelnen Einflußfaktoren und Modellrechnung zu bestimmen, welche Funktion dann gemäß Anspruch 4 der zukünftigen Steuerung der Häufigkeit des Waschvorgangs in Abhängigkeit von dem jeweiligen Farbverbrauch zugrundgelegt werden kann. Die genannte Funktion der Häufigkeit und/oder Art des Waschvorgangs in Abhängigkeit von dem Farbverbrauch kann mittels digitaler Daten abgespeichert werden. Der entsprechende Speicher wird nachfolgend auch Funktionsgeber bezeichnet.Instead, it is also possible to determine which influencing factors in the function of the frequency and / or type of washing process depending on the color consumption Analysis of the individual influencing factors and model calculation determine which function then according to claim 4 of the future Controlling the frequency of the washing process depending on can be used as a basis for the respective color consumption. The stated function of the frequency and / or type of washing process depending on the color consumption can be by means of digital data can be saved. The corresponding memory is also referred to below as function generator.

Eine Anordnung zur Durchführung des erfindungsgemäßen Verfahrens nach den Ansprüchen 1 und 2 an einer Waschvorrichtung, die wenigstens einem Teil eines Druckwerkes einer Offsetdruckmaschine mit einem Leitstand zugeordnet ist, zeichnet sich durch die in dem kennzeichnenden Teil des Anspruchs 5 angebenen Merkmale aus.An arrangement for performing the method according to the invention according to claims 1 and 2 on a washing device, the at least part of a printing unit of an offset printing press associated with a control center stands out by those specified in the characterizing part of claim 5 Characteristics.

Dabei umfaßt der Leitstand der Druckmaschine eine Signalverarbeitungseinrichtung, die Eingänge für Steuerungs-/Rückmeldesignale einer zonalen Einstellung von Farbdosierelementen, einer Farbstreifenbreite bzw. eines Hebertakts sowie einen mit diesen Eingängen gekoppelten Funktionsgeber aufweist. Die Signalverarbeitungseinrichtung ist dazu eingerichtet, aus den genannten Steuerungs-/Rückmeldesignalen Signale bzw. Daten der verbrauchten Druckfarbenmenge zu bilden. Diese Signale/Daten der verbrauchten Druckfarbenmenge stehen an einem Ausgang der Signalverarbeitungseinrichtung an. Mit diesem Ausgang ist ein Eingang eines Funktionsgebers gekoppelt, in dem eine Funktion der Abhängigkeit der Häufigkeit und/oder Art des Waschvorgangs von der verbrauchten Druckfarbenmenge gespeichert ist. Der Funktionsgeber kann nach Anspruch 6 zweckmäßig ein digitaler Speicher sein, in dem nach Art einer Liste Daten der verbrauchten Druckfarbenmenge, korrespondierenden Daten der Häufigkeit und/oder Art des Waschvorgangs fest zugeordnet sind. Aus den letztgenannten Daten werden Signale gebildet, die von einem Ausgang des Funktionsgebers einer Steuerung der Waschvorrichtungen zugeführt werden können. Wenn das Druckwerk mehrere Waschvorrichtungen umfaßt, von denen je eines dem Gummituchzylinder, dem Druckzylinder, dem Feuchtwerk und dem Farbwerk zugeordnet ist, können die Waschvorrichtungen je nach Art des Waschvorgangs einzeln oder kombiniert durch die Steuerung aktiviert werden.The control center of the printing press comprises a signal processing device, the inputs for control / feedback signals a zonal setting of color metering elements, a color stripe width or a lifter stroke and one with has coupled inputs to these inputs. The Signal processing device is set up from the mentioned control / feedback signals signals or data of the amount of ink consumed. These signals / data the amount of ink used is at an exit of the Signal processing device. With this exit is a Input of a function generator coupled in which a function the dependence on the frequency and / or type of washing process of the amount of ink used is stored. The Function generator can be expediently a digital according to claim 6 Be memory in which, in the manner of a list, data of the used Ink quantity, corresponding frequency data and / or the type of washing process are permanently assigned. Signals are generated from the latter data, which are generated by an output of the function generator of a control of the washing devices can be supplied. If the printing unit comprises several washing devices, one of which each Blanket cylinder, the impression cylinder, the dampening unit and the Inking unit is assigned, the washing devices can vary depending Type of washing process individually or combined by the control to be activated.

Ein Ausführungsbeispiel der erfindungsgemäßen Anordnung wird im folgenden anhand einer Zeichnung mit einer Figur näher erläutert, worin zeigt

Fig. 1
ein Druckwerk einer als Rotationsdruckmaschine ausgebildeten Offsetdruckmaschine mit einem schematisch angedeuteten Leitstand zur Steuerung.
An embodiment of the arrangement according to the invention is explained below with reference to a drawing with a figure, which shows
Fig. 1
a printing unit of an offset printing machine designed as a rotary printing press with a schematically indicated control center for control.

In Fig. 1 ist ein Druckwerk einer Mehrfarbenrotationsdruckmaschine mit einem Druckzylinder 1 und einer in Bogenlaufrichtung vorgeordneten Transfertrommel 2 schematisch dargestellt. Dem Druckzylinder 1 benachbart ist ein Gummituchzylinder 3, der mit einem Plattenzylinder 4 in Berührung steht. Mit dem Plattenzylinder 4 in Verbindung stehen ein Farbwerk 16 und eine Feuchtwerk 17.In Fig. 1 is a printing unit of a multi-color rotary printing press with a printing cylinder 1 and one in the direction of sheet travel upstream transfer drum 2 shown schematically. Adjacent to the impression cylinder 1 is a blanket cylinder 3, which is in contact with a plate cylinder 4. With the Plate cylinders 4 are connected to an inking unit 16 and a dampening unit 17.

Dem Gummituchzylinder 3 ist eine Waschvorrichtung 5 zugeordnet. Die Waschvorrichtung 5 besteht im wesentlichen aus einer z.B. als Waschbürste ausgebildeten Waschwalze, die in einem Gehäuse drehbar gelagert ist. In dem Gehäuse sind zur gesteuerten Zufuhr von Waschmittel und Wasser Sprüheinrichtungen angeordnet, die mit einer Steuerung 6 der Waschvorrichtung in einem Leitstand 7 schaltungstechnisch gekoppelt sind. Die Waschwalze ist weiterhin mit einem separaten Antrieb verbunden und steht mit einem Rakel in ständigem Eingriff. Die Waschvorrichtung 5 ist insgesamt durch Arbeitszylinder an den Gummituchzylinder anstellbar bzw. von diesem abstellbar. Die An/Abstellung wird ebenfalls von der Steuerung 6 in dem Leitstand 7 betätigt, wobei sich die Waschvorrichtung normalerweise in abgestellter Position befindet.A washing device 5 is assigned to the blanket cylinder 3. The washing device 5 consists essentially of a e.g. trained as a washing brush washing roller, which in one Housing is rotatably mounted. In the housing are controlled Supply of detergent and water spray devices arranged with a controller 6 of the washing device in a control center 7 are coupled in terms of circuitry. The Washer roller is still connected to a separate drive and is in constant engagement with a squeegee. The washing device 5 is a total of working cylinders on the blanket cylinder employable or detachable from this. The on / off is also from the control 6 in the control room 7 operated, the washing device normally is in the parked position.

Eine weitere Waschvorrichtung 5a, die in ähnlicher Weise ausgebildet und betätigt werden kann, ist dem Druckzylinder 1 zugeordnet.Another washing device 5a, which is formed in a similar manner and can be operated is assigned to the pressure cylinder 1.

Eine Waschvorrichtung 5b ist einer Walze des Farbwerks zugeordnet. Die Ausbildung dieser Waschvorrichtung ist allgemein bekannt und umfaßt im wesentlichen einen Farbe auf der Walze abnehmenden Abstreifer bzw. Rakel sowie eine nicht dargestellte Sprühvorrichtung, mit der Waschflüssigkeit auf eine der oberen Walzen des Farbwerks 16 aufgesprüht werden kann. In der vorliegenden Ausführungsform der erfindungsgemäßen Anordnung werden die Walzen des Feuchtwerkes 17 mit den Walzen des Farbwerkes 16 gewaschen. In einer anderen Ausführungsform kann aber statt dessen dem Feuchtwerk 17 eine separate ähnliche Waschvorrichtung zugeordnet sein, die von der Waschvorrichtung 5b getrennt angesteuert werden kann.A washing device 5b is assigned to a roller of the inking unit. The design of this washing device is general known and essentially comprises a color on the roller decreasing scraper or squeegee and a not shown Spray device, with the washing liquid on one of the upper rollers of the inking unit 16 can be sprayed on. In the present embodiment of the arrangement according to the invention the rollers of the dampening unit 17 with the rollers of the inking unit 16 washed. In another embodiment, can but instead a separate one similar to dampening unit 17 Washer associated with the washer 5b can be controlled separately.

Der zentrale Leitstand umfaßt weiter unter anderem eine Signalverarbeitungseinrichtung 8, von der ein nicht bezeichneter Ausgang mit einem ebenfalls nicht bezeichneten Eingang eines Funktionsgebers 9 gekoppelt ist. Ein nicht bezeichneter Ausgang des Funktionsgebers ist zu einem ebenfalls nicht bezeichneten Eingang der Steuerung 6 der Waschvorrichtungen 5, 5a, 5b geführt, wobei die Steuerung einen zweiten herkömmlichen Eingang 10 beispielsweise zu einer üblichen manuellen Betätigung der Waschvorrichtungen 5, 5a, 5b aufweist. Ausgangsleitungen der Steuerung 6 sind mit dem gemeinsamen Bezugszeichen 11 versehen. The central control center also includes a signal processing device 8, of which an unmarked Output with an input, also not designated Function generator 9 is coupled. An unmarked exit of the function generator is also not designated Input of the control 6 of the washing devices 5, 5a, 5b led, the controller a second conventional input 10 for example for a conventional manual operation of the washing devices 5, 5a, 5b. Output lines the controller 6 are identified by the common reference number 11 Mistake.

Eingänge der Signalverarbeitungseinrichtung 8 sind mit Leitungen 12 - 14 verbunden, die Signale entsprechend Stellungen einzelner Farbdosiereinrichtungen führen, die als Stellsignale über diese Leitungen zu dem Leitstand zurückgeführt werden. Die Leitungen, die die Signale zur Verstellung der Farbdosiereinrichtungen von dem Leitstand zu den Farbdosiereinrichtungen hinführen, sind nicht dargestellt. Aus Fig. 1 ist hingegen weiter eine Leitung 15 ersichtlich, welche Signale von einer nicht dargestellten Heberwalze zu dem Leitstand 7 zurückmeldet, welche Signale ebenfalls in einen Eingang der Signalverarbeitungseinrichtung eingegeben werden. Die Leitung 15 führt Signale entsprechend der Zeitspanne, während der die Heberwalze an einer nicht dargestellten Farbkastenwalze anliegt. Sie kann zusätzlich ein Signal führen, welches die Drehgeschwindigkeit der Farbkastenwalze beinhaltet, um damit die Farbstreifenbreite des von der Heberwalze übertragenen Farbfilms zu kennzeichnen. Die Farbstreifenlänge ist dabei durch die Abmessungen der nebeneinander angeordneten Farbdosiereinrichtungen definiert und die Farbschichtdicke durch die zonale Einstellung dieser Farbdosierelemente. Die Signalverarbeitungseinrichtung 8 ist so ausgebildet, daß sie aus den einlaufenden Signalen bzw. entsprechenden Daten und zusätzlichen eingegebenen Konstanten und Variablen ein Signal bzw. Daten bildet, welche der Menge der verbrauchten Druckfarbe entsprechen, d.h. eine Kenngröße für diesen Verbrauch beinhalten. Dazu wird die Menge der verbrauchten Druckfarbe nach bekannten mathematischen Beziehungen errechnet, die in der Signalverarbeitungseinrichtung 8 durch Hardware und/oder Software realisiert sein können.Inputs of the signal processing device 8 are with lines 12 - 14 connected, the signals according to positions individual color metering devices that act as control signals can be returned to the control center via these lines. The lines that carry the signals for adjusting the color metering devices from the control center to the color metering devices lead are not shown. 1 is, however further a line 15 can be seen which signals from a reports lifting roller (not shown) back to control station 7, which signals also into an input of the signal processing device can be entered. Line 15 leads Signals corresponding to the period of time during which the lifting roller abuts an ink fountain roller, not shown. she can also carry a signal indicating the speed of rotation the ink fountain roller includes to thereby the ink strip width of the ink film transferred from the lifter roller to mark. The color stripe length is by the Dimensions of the ink dosing devices arranged side by side defined and the color layer thickness by the zonal Setting these color metering elements. The signal processing device 8 is designed so that it from the incoming Signals or corresponding data and additional entered constants and variables a signal or data forms, which correspond to the amount of ink used, i.e. contain a parameter for this consumption. For this purpose, the amount of printing ink used is known mathematical relationships calculated in the signal processing device 8 realized by hardware and / or software could be.

Das von einem Ausgang entnehmbare Signal bzw. die entsprechenden Daten der Signalverarbeitungseinrichtung beinhalten somit ein genaues Maß des Druckfarbenverbrauchs, welches in den Funktionsgeber 9 eingespeist wird. Dort wird aus dem Maß des Druckfarbenverbrauchs nach einer zuvor eingespeicherten Funktion der Häufigkeit und/oder der Art des Waschvorgangs in Abhängigkeit von dem Farbverbrauch, die empirisch oder durch Modellrechnung gebildet sein kann, ein Signal gebildet, welches in die Steuerung 6 der Waschvorrichtungen 5, 5a, 5b eingespeist wird. Entsprechend dem in diese Steuerung eingespeisten Signal wird der Waschvorgang ausgelöst, wobei in dem Falle der Aktivierung der Waschvorrichtung 5 die Waschwalze der Waschvorrichtung 5 an den Gummituchzylinder 3 angestellt wird. Außerdem kann die Zufuhr von Waschmittel und Wasser durch die Sprüheinrichtungen gesteuert erfolgen. Analog wird die Waschvorrichtung 5a an dem Druckzylinder 1 aktiviert. Die Aktivierung der Waschvorrichtung 5b an dem Farb- und Druckwerk löst dort entsprechende Sprüh- und Rakelvorgänge aus. Diese Waschvorgänge laufen also in Abhängigkeit von dem ermittelten Druckfarbenverbrauch ab, der auch für andere herkömmliche Zwecke, z.B. zur Bevorratung der Druckfarbe, genutzt werden kann. The signal that can be taken from an output or the corresponding ones Data of the signal processing device thus contain an exact measure of the ink consumption, which in the Function generator 9 is fed. There is the measure of Ink consumption according to a previously stored function the frequency and / or the type of washing process in Depending on the color consumption, empirically or through Model calculation can be formed, a signal is formed which fed into the controller 6 of the washing devices 5, 5a, 5b becomes. According to that fed into this control Signal is triggered, the washing process, in which If the washing device 5 is activated, the washing roller the washing device 5 on the blanket cylinder 3 employed becomes. It can also add detergent and water controlled by the spray devices. Becomes analog the washing device 5a is activated on the printing cylinder 1. The Activation of the washing device 5b on the inking and printing unit triggers appropriate spraying and doctoring processes there. This Washing processes therefore run depending on the determined Ink consumption from that of other conventional Purposes, e.g. for storing the printing ink can.

Bezugszeichenliste:Reference symbol list:

11
DruckzylinderImpression cylinder
22nd
TransfertrommelTransfer drum
33rd
GummituchzylinderBlanket cylinder
44th
PlattenzylinderPlate cylinder
5,5a,5b5.5a, 5b
WaschvorrichtungWashing device
66
Steuerung der WaschvorrichtungenControl of the washing devices
77
LeitstandControl center
88th
SignalverarbeitungseinrichtungSignal processing device
99
FunktionsgeberFunction generator
1010th
2. Eingang2nd entrance
11.11.
AusgangsleitungenOutput lines
12.12th
Leitungmanagement
13.13.
Leitungmanagement
14.14.
Leitungmanagement
15.15.
Leitungmanagement
16.16.
FarbwerkInking unit
1717th
FeuchtwerkDampening system

Claims (6)

  1. Process for automatically controlled washing of at least a part of a printing unit of an offset printing press in which at least one printing unit comprises as its parts blanket and impression cylinder, an inking unit and, if necessary, a damping unit, and in which the control of at least one washing device, which is fitted to at least one of the parts, takes place especially with respect to the frequency of washing dependent on characteristic values which are derived from functions of the printing unit and/or generated for its control,
    characterised in that first an ink usage of the printing unit arising during the press running is determined in accordance with the values of at least one characteristic quantity of the ink metering and that from the ink usage determined in this fashion, the frequency and/or type of the washing process is determined.
  2. Process according to Claim 1, characterised in that the characteristic values in accordance with which measures the ink usage and from this the frequency and/or type of the washing process are determined are the control/feedback signals of a zonal adjustment of ink metering elements, an ink stripe width or a vibrator rhythm.
  3. Process according to Claim 1 or 2, characterised in that the function of the frequency and/or type of the washing process is determined as a value store in dependence on the ink usage empirically and the future control of the frequency and/or type of the washing process are based depending on the respective ink usage.
  4. Process according to Claim 1 or 2, characterised in that the function of the frequency and/or type of the washing process is determined in dependence on the ink usage by means of model calculations and the future control of the frequency of the washing process is based depending upon the respective ink usage.
  5. Arrangement for carrying out the process according to claims 1 and 2 at at least one washing device which is fitted to at least one part of a printing unit of an offset printing press, wherein at least one printing unit comprises as its parts blanket and impression cylinder, an inking unit and if necessary a damping unit, and wherein the offset printing press has a control desk, characterised in that in the control desk (7), a signal processing unit (8) is provided which has inputs for control/feedback signals of a central adjustment of metering elements, an ink stripe width or a vibrator rhythm, which is so adjusted to form from the noted control/feedback signals signals/data of the quantity of printing ink used, which are present at at least one output of the signal processing device (8), that with this output, the input of a function generator (9) in which a function of the dependence of the frequency and/or type of the washing process on the quantity of printing ink used is stored, is linked with this output, and that an output of the function generator (9) is connected with a control (6) of the washing device (5 or 5a or 5b).
  6. Arrangement according to Claim 5, characterised in that the function generator (9) is constructed as a digital store.
EP98101233A 1997-02-14 1998-01-24 Method and apparatus for cleaning a portion of a printing unit of an offset printing machine Expired - Lifetime EP0858891B1 (en)

Applications Claiming Priority (2)

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DE19705632 1997-02-14
DE19705632A DE19705632A1 (en) 1997-02-14 1997-02-14 Method and arrangement for cleaning a part of a printing unit of an offset printing machine

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EP0858891A1 EP0858891A1 (en) 1998-08-19
EP0858891B1 true EP0858891B1 (en) 2000-03-15

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EP (1) EP0858891B1 (en)
JP (1) JP2834729B2 (en)
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ATE190559T1 (en) 2000-04-15
DE59800098D1 (en) 2000-04-20
JP2834729B2 (en) 1998-12-14
DE19705632A1 (en) 1998-09-03
EP0858891A1 (en) 1998-08-19
JPH10226051A (en) 1998-08-25
US5964157A (en) 1999-10-12

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