EP3177464B1 - Highly dynamic ink density control - Google Patents

Highly dynamic ink density control Download PDF

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Publication number
EP3177464B1
EP3177464B1 EP15748237.3A EP15748237A EP3177464B1 EP 3177464 B1 EP3177464 B1 EP 3177464B1 EP 15748237 A EP15748237 A EP 15748237A EP 3177464 B1 EP3177464 B1 EP 3177464B1
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EP
European Patent Office
Prior art keywords
roller
ink
ink fountain
fountain roller
ductor
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EP15748237.3A
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German (de)
French (fr)
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EP3177464A1 (en
Inventor
Thomas Klassert
Lothar KÜHLMEYER
Stefan Vogel
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Manroland Sheetfed GmbH
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Manroland Sheetfed GmbH
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Publication of EP3177464A1 publication Critical patent/EP3177464A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/13—Means for driving fountain rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/04—Ducts, containers, supply or metering devices with duct-blades or like metering devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/14—Applications of messenger or other moving transfer rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/04—Tripping devices or stop-motions
    • B41F33/10—Tripping devices or stop-motions for starting or stopping operation of damping or inking units

Definitions

  • the invention relates to a method for color density control according to the preamble of claim 1.
  • a method is known on a multi-color autotypic printing machine for achieving a preselected printing result on a printing substrate. Measured values in the form of solid densities and / or screen densities are obtained from measuring fields printed on the printing substrate, and deviations of instantaneous printed results from the preselected printing result are determined from the measured values.
  • the supply of the printing inks to at least selected ink zones of the printing material is first changed for a limited period of time greater than the determined deviations, and only then adjusted according to the deviations.
  • the disadvantage is that in spite of zonal change in the ink supply, the changed amount of ink is to be conveyed over the multiplicity of inking rollers and thus there is a delay in the adaptation of the inking.
  • a method and an apparatus for supplying ink quantity is known.
  • the process for ink supply and a corresponding An inking unit for carrying out the method operates with a drive having a driveable with specifiable speed values ink fountain roller, a co-operating with the ink fountain roller inking, one of the ink fountain roller downstream and by means of a drive between the ink fountain roller and another ink roller reciprocating lifting roller and a controller, which with the color dosing, the drive of the ink fountain roller and the squeegee roller is in signal communication.
  • the control is set in motion when changing the color metering settings.
  • the disadvantage is that only in certain periods of time a changed amount of ink can be supplied and so the reaction time of the inking unit does not decrease significantly.
  • the object of the invention is to come in a color control process to a faster adjustment of the ink quantity located in the inking unit and thus to save waste paper.
  • a highly dynamic color density control is proposed in which the ink slide opening is increased or undershot compared to the calculated value for a certain period of time and / or a number of setting operations of a lifting roller.
  • the Farbduktor horrinsky и is set to a maximum value or approximately to the maximum value of 95 to 100%.
  • the target color density is achieved much faster than with known dynamic color density controls.
  • the siphon strip width is already changed, as long as the investment time of the squeegee roller on the ink fountain roller remains constant.
  • the adjustment of the squeegee can also be adjusted via a change in the investment time of the squeegee roller on the ink fountain roller. Then the adjustment to a maximum value or approximately to the maximum value of 99 to 100% would relate to the adjustability of the lifter drive with respect to the investment time.
  • Fig. 1 shows in principle the upper part of a lifting inking unit of an offset printing press, not shown.
  • an ink fountain roller 1 cooperates, which has a controllable drive 4.
  • the direction of rotation of the ink fountain roller 1 is indicated by the arrow.
  • At the lower end of the ink fountain 2 Farbdosieriata 3 are arranged, which are formed, for example, as a linearly movable and each having an actuator having color slider.
  • the ink fountain roller 1 is arranged downstream of a moving between the ink fountain roller 1 and another ink roller 7 and forth squeegee roller 6.
  • the squeegee roller 6 is associated with a drive 8.
  • the length of the removed from the squeegee roller 6 of the ink fountain roller 1 color strip thus depends on the speed of the ink fountain roller 1 and is thus adjustable via a speed specification of the drive 4.
  • the drive 4 of the ink fountain roller 1 is in signal communication with a controller 5, wherein the controller 5 also has a connection with the means for color metering 3 and the drive 8 of the lifting roller 6.
  • the controller 5 also has a connection with the means for color metering 3 and the drive 8 of the lifting roller 6.
  • the controller 5 also has a connection with the means for color metering 3 and the drive 8 of the lifting roller 6.
  • the ink supply via the Farbdosieretti 3 dynamically, ie during the printing process with ongoing color transport, changed responsive to the controller 5 in accordance with the invention in various ways .
  • the ink fountain roller 1 is accelerated from the speed value provided for the predetermined pressure situation to a maximum or approximately maximum speed value for the duration of a dynamic adjustment of the ink metering elements 3.
  • the change in the ink layer on the surface of the ink fountain roller 1 caused by the change in the metering elements is dynamically converted and thus comes into direct contact with the lifter roller 6 more quickly.
  • the drive 4 of the ink fountain roller 1 is controlled so that again the previous and selected for the intended pressure situation speed value is driven at the ink fountain roller 1.
  • the squeegee 6 can be adjusted via their drive 8 in their reciprocating motion to the ink fountain roller 1, that determined by the investment time at the ink fountain roller 1 HeberstMailbreite of the the predetermined pressure situation provided value is switched to a maximum or approximately maximum value of the HeberstMail Museum.
  • This also ensures that the conditional by changing the metering change of the ink layer on the surface of the ink fountain roller 1 passes directly from the squeegee roller 6 to the subsequent inking roller 7.
  • the drive 8 of the lifting roller 6 is controlled so that again the previous and selected for the intended pressure situation value of investment time and thus the HeberstMail is moved to the lifting roller 6.
  • Fig. 2a) - 2c show the principal mode of action of the invention.
  • Fig. 2a the situation during the initial adjustment of the Farbdosieriata 3 is shown.
  • the ink fountain roller 1 moves the predetermined speed for the printing situation (arrow), the squeegee 6 oscillates between ink fountain and downstream ink roller. 7
  • Fig. 2b is a change in the Farbdosier sculpture 3 - has been made here an increase in the ink supply in the form of a larger gap between Farbdosierelement 3 and the surface of the ink fountain roller 1-. This causes a jump in the ink layer 9 on the ink fountain roller 1. The squeegee 6 has no contact with the ink fountain roller 1.
  • the speed of the ink fountain roller 1 to 99 to 100% of their Increased maximum speed so that the greater layer thickness 9 (greater set gap) comes faster in the contact area with the squeegee roller 6 and especially when the thicker ink layer with the squeegee roller 6 in contact, a thicker and longer lifter strip of ink on the squeegee 6 generated and transferred from this in the inking unit.
  • the increased speed of the ink fountain roller 1 is indicated by the length of the arrow.
  • Fig. 2c is shown that after touching the squeegee roller 6 with the ink fountain roller 1 caused by changing the ink metering ink layer thickness change 9 is now transferred to the squeegee roller 6 and then transferred from this in contact with the downstream ink roller 7 to the other rollers of the inking unit.
  • the ink fountain roller 1 is constantly driven at the maximum or approximately maximum speed until the dynamic adjustment of the Farbdosieretti 3 is completed.
  • Fig. 2.c the second alternative is recognizable.
  • the removed by the squeegee roller 6 from the ink fountain roller 1 color strip S is shown in its resting as a HeberstMailbreite on the circumference of the squeegee roller 6 color layer.
  • This lift strip width can alternatively be set to a value of 95 to 100% of the maximum value during the dynamic adjustment of the color metering elements 3. It is therefore intended according to the invention that, during the period of dynamic adjustment of the ink metering elements 3, a maximization of the investment time between the ink fountain roller 1 and the lifting roller 6 should take place.
  • the adjustment of the speed of the ink fountain roller and the adjustment of the HeberstMailbreite or the investment time between the ink fountain roller 1 and the lifting roller 6 can be performed in combination with each other.
  • a vote in time connection and shutdown can be provided.

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  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Description

Die Erfindung betrifft ein Verfahren zur Farbdichteregelung nach dem Oberbegriff von Anspruch 1.The invention relates to a method for color density control according to the preamble of claim 1.

Bei der Farbregelung in Offsetdruckmaschinen ist es bekannt, dass ein Regelschritt zu einer Veränderung von Farbdosierelementeinstellungen führt. Dabei muss die so veränderte in das Farbwerk des Offsetdruckwerkes zu fördernde Farbmenge über eine große Anzahl von Farbwalzen gefördert werden, bis sie die Druckplatte erreicht und dort die erwünschte Farbmenge einstellt. Dieser Übergangszeitraum bedingt eine Anzahl von Druckbogen mit noch nicht richtiger Färbung, die als Makulaturbogen aufgefasst werden müssen.In color control in offset printing presses, it is known that a control step leads to a change in Farbdosierelementeinstellungen. In this case, the so changed in the inking unit of the offset printing unit to be conveyed quantity of ink must be promoted over a large number of ink rollers until it reaches the printing plate and there sets the desired amount of ink. This transitional period requires a number of printed sheets with not yet correct coloring, which must be regarded as spoiled sheets.

Aus der DE 39 04 301 A1 ist ein Verfahren an einer autotypisch arbeitenden Mehrfarben-Druckmaschine zur Erzielung eines vorgewählten Druckresultats auf einem Bedruckstoff bekannt. Aus auf den Bedruckstoff gedruckten Messfeldern werden Messwerte in Form von Volltondichten und/oder Rasterdichten gewonnen, und aus den Messwerten werden Abweichungen momentaner Druckresultate vom vorgewählten Druckresultat ermittelt. Um das momentane Druckresultat bei Bedarf möglichst schnell an das vorgewählte Druckresultat anzunähern, wird die Zufuhr der Druckfarben zumindest zu ausgewählten Farbzonen des Bedruckstoffs zunächst für eine beschränkte Zeitspanne stärker, als den ermittelten Abweichungen entspricht, verändert, und erst danach entsprechend den Abweichungen eingestellt.
Nachteilig ist, dass trotz zonaler Veränderung der Farbzufuhr die veränderte Farbmenge über die Vielzahl von Farbwalzen zu fördern ist und damit eine Verzögerung bei der Anpassung der Einfärbung eintritt.From the DE 39 04 301 A1 A method is known on a multi-color autotypic printing machine for achieving a preselected printing result on a printing substrate. Measured values in the form of solid densities and / or screen densities are obtained from measuring fields printed on the printing substrate, and deviations of instantaneous printed results from the preselected printing result are determined from the measured values. In order to approximate the instantaneous print result to the preselected print result as quickly as possible, the supply of the printing inks to at least selected ink zones of the printing material is first changed for a limited period of time greater than the determined deviations, and only then adjusted according to the deviations.
The disadvantage is that in spite of zonal change in the ink supply, the changed amount of ink is to be conveyed over the multiplicity of inking rollers and thus there is a delay in the adaptation of the inking.

Aus der DE 102 42 278 A1 ist ein Verfahren und eine Vorrichtung zur Farbmengenzufuhr bekannt. Das Verfahren zur Farbzufuhr sowie ein entsprechendes Farbwerk zur Durchführung des Verfahrens arbeitet mit einer einen Antrieb aufweisenden, mit vorgebbaren Drehzahlwerten fahrbaren Farbkastenwalze, einer mit der Farbkastenwalze zusammenwirkenden Farbdosierung, einer der Farbkastenwalze nachgeordneten und mittels eines Antriebes zwischen der Farbkastenwalze und einer weiteren Farbwalze hin und her bewegbaren Heberwalze sowie einer Steuerung, welche mit der Farbdosierung, dem Antrieb der Farbkastenwalze sowie der Heberwalze in Signalverbindung steht.From the DE 102 42 278 A1 For example, a method and an apparatus for supplying ink quantity is known. The process for ink supply and a corresponding An inking unit for carrying out the method operates with a drive having a driveable with specifiable speed values ink fountain roller, a co-operating with the ink fountain roller inking, one of the ink fountain roller downstream and by means of a drive between the ink fountain roller and another ink roller reciprocating lifting roller and a controller, which with the color dosing, the drive of the ink fountain roller and the squeegee roller is in signal communication.

Zur spürbaren Beschleunigung der Reaktionszeit des Farbwerkes wird die Steuerung bei Veränderungen der Einstellungen der Farbdosierung in Gang gesetzt. Dabei wird der Antrieb der Farbkastenwalze in einer Zeitspanne, in welcher die Heberwalze keinen Kontakt zur Farbkastenwalze hat, auf einen höheren Drehzahlwert angesteuert.
Nachteilig ist, dass nur in bestimmten Zeiträumen eine veränderte Farbmenge zuführbar ist und so die Reaktionszeit des Farbwerkes nicht wesentlich absinkt.To noticeably speed up the reaction time of the inking unit, the control is set in motion when changing the color metering settings. In this case, the drive of the ink fountain roller in a period in which the lifting roller has no contact with the ink fountain roller, driven to a higher speed value.
The disadvantage is that only in certain periods of time a changed amount of ink can be supplied and so the reaction time of the inking unit does not decrease significantly.

Aufgabe der Erfindung ist es in einem Farbregelverfahren zu einer schnelleren Anpassung der im Farbwerk befindlichen Farbmenge zu kommen und damit Makulaturbogen einzusparen.The object of the invention is to come in a color control process to a faster adjustment of the ink quantity located in the inking unit and thus to save waste paper.

Erfindungsgemäß wird demnach eine hochdynamische Farbdichteregelung vorgeschlagen, bei der die Farbschieberöffnung gegenüber dem berechneten Wert für eine bestimmte Zeitspanne und/oder eine Anzahl von Anstellvorgängen einer Heberwalze überhöht bzw. unterschritten wird.According to the invention, therefore, a highly dynamic color density control is proposed in which the ink slide opening is increased or undershot compared to the calculated value for a certain period of time and / or a number of setting operations of a lifting roller.

Für die Dauer einer dynamischen Verstellung wird die Farbduktorgeschwindigkeit und/oder die Heberstreifenbreite auf einen Maximalwert bzw. annähernd auf den Maximalwert von 95 bis 100 % gestellt. Dadurch wird die Sollfarbdichte wesentlich schneller erreicht als bei bekannten dynamischen Farbdichteregelungen.For the duration of a dynamic adjustment, the Farbduktorgeschwindigkeit and / or the Heberstreifenbreite is set to a maximum value or approximately to the maximum value of 95 to 100%. As a result, the target color density is achieved much faster than with known dynamic color density controls.

Durch die Veränderung der Farbduktorgeschwindigkeit wird bereits die Heberstreifenbreite verändert, so lange die Anlagezeit der Heberwalze an der Farbkastenwalze konstant bleibt. Die Verstellung des Heberstreifens kann aber auch über eine Veränderung der Anlagezeit der Heberwalze an der Farbkastenwalze verstellt werden. Dann würde die Einstellung auf einen Maximalwert bzw. annähernd auf den Maximalwert von 99 bis 100 % sich auf die Einstellbarkeit des Heberantriebs hinsichtlich der Anlagezeit beziehen.By changing the Farbduktorgeschwindigkeit the siphon strip width is already changed, as long as the investment time of the squeegee roller on the ink fountain roller remains constant. The adjustment of the squeegee can also be adjusted via a change in the investment time of the squeegee roller on the ink fountain roller. Then the adjustment to a maximum value or approximately to the maximum value of 99 to 100% would relate to the adjustability of the lifter drive with respect to the investment time.

Die Erfindung weist folgende Vorteile auf bzw. vermeidet folgende Nachteile:

  1. a) Schnelleres Erreichen der Sollfarbdichte
  2. b) Der Verfahrweg der Farbdosierelemente ist kleiner als beim herkömmlichen dynamischen Verfahren.
  3. c) Sehr große Schieberöffnungen, die ein Spritzen von Farbe nach sich ziehen können, werden vermieden.
The invention has the following advantages or avoids the following disadvantages:
  1. a) Faster achievement of the target color density
  2. b) The travel of the Farbdosierelemente is smaller than in the conventional dynamic method.
  3. c) Very large slide openings, which can cause a splash of color, are avoided.

Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen.

  • Fig.1 ein erfindungsgemäßes Farbwerk mit Steuerung, und
  • Fig.2 die Wirkung der Erfindung im Bereich Farbdosierung und Farbkastenwalze.
Advantageous developments emerge from the subclaims.
  • Fig.1 an inventive inking unit with control, and
  • Fig.2 the effect of the invention in color dosing and ink fountain roller.

Fig. 1 zeigt prinzipiell den oberen Teil eines Heberfarbwerkes einer nicht dargestellten Offsetdruckmaschine. Mit dem Farbkasten 2 wirkt eine Farbkastenwalze 1 zusammen, welche einen steuerbaren Antrieb 4 aufweist. Die Drehrichtung der Farbkastenwalze 1 ist durch den Pfeil angegeben.
Am unteren Ende des Farbkastens 2 sind Farbdosierelemente 3 angeordnet, welche beispielsweise als linear bewegliche und jeweils einen Stellantrieb aufweisende Farbschieber ausgebildet sind.
Der Farbkastenwalze 1 nachgeordnet ist eine zwischen der Farbkastenwalze 1 sowie einer weiteren Farbwalze 7 hin und her bewegte Heberwalze 6. Der Heberwalze 6 ist ein Antrieb 8 zugeordnet. Die Länge des von der Heberwalze 6 von der Farbkastenwalze 1 abgenommenen Farbstreifens hängt somit von der Drehzahl der Farbkastenwalze 1 ab und ist somit über eine Drehzahlvorgabe des Antriebs 4 einstellbar. Fig. 1 shows in principle the upper part of a lifting inking unit of an offset printing press, not shown. With the ink fountain 2, an ink fountain roller 1 cooperates, which has a controllable drive 4. The direction of rotation of the ink fountain roller 1 is indicated by the arrow.
At the lower end of the ink fountain 2 Farbdosierelemente 3 are arranged, which are formed, for example, as a linearly movable and each having an actuator having color slider.
The ink fountain roller 1 is arranged downstream of a moving between the ink fountain roller 1 and another ink roller 7 and forth squeegee roller 6. The squeegee roller 6 is associated with a drive 8. The length of the removed from the squeegee roller 6 of the ink fountain roller 1 color strip thus depends on the speed of the ink fountain roller 1 and is thus adjustable via a speed specification of the drive 4.

Der Antrieb 4 der Farbkastenwalze 1 steht mit einer Steuerung 5 in Signalverbindung, wobei die Steuerung 5 ebenfalls eine Verbindung mit den Einrichtungen zur Farbdosierung 3 und dem Antrieb 8 der Heberwalze 6 aufweist. Durch die Verbindung mit dem Antrieb 8 ist durch die Steuerung 5 die Dauer der Anlagezeit der Heberwalze 6 an der Farbkastenwalze 1 erfassbar, und auch ob diese an der Farbkastenwalze 1 anliegt oder nicht. Dies erfolgt z.B. durch im Antrieb 8 angeordnete und die hin und her gehende Bewegung der Heberwalze 6 erfassende Signalgeber.
Wird nun durch eine nicht dargestellte und mit der Steuerung 5 in Signalverbindung stehende Eingabevorrichtung, wie etwa einer Farbregelanlage, die Farbzufuhr über die Farbdosierelemente 3 dynamisch, also während des Druckprozesses bei laufendem Farbtransport, verändert, reagiert darauf die Steuerung 5 in erfindungsgemäßer Weise auf verschiedene Art.
Zum einen wird für die Dauer einer dynamischen Verstellung der Farbdosierelemente 3 die Farbkastenwalze 1 von dem für die vorgegebene Drucksituation vorgesehenen Geschwindigkeitswert auf einen maximalen oder annähernd maximalen Geschwindigkeitswert beschleunigt. Dadurch wird erreicht, dass die durch Veränderung der Dosierelemente bedingte Änderung der Farbschicht auf der Oberfläche der Farbkastenwalze 1 dynamisch umgesetzt und damit schneller in direkten Kontakt mit der Heberwalze 6 gelangt.
Bei vorgegebener, gleichbleibender Anlagezeit der Heberwalze 6 an der Farbkastenwalze 1 wird damit ein längerer so genannter Heberstreifen erzeugt. Damit ist die Abwicklungslänge der Oberfläche der Heberwalze 6 an der Farbkastenwalze 1 gemeint. Bei einem Vergrößern Dosierelementöffnung wird also durch die Beschleunigung der Farbkastenwalze 1 zusätzlich mehr Druckfarbe über die folgenden Farbwalzen ins Farbwerk gefördert.
Andererseits kann auch, wenn weniger Druckfarbe gefördert werden soll und die Dosierelementöffnung verkleinert wird, durch die Beschleunigung der Farbkastenwalze 1 während der Verkleinerung der Dosierelementöffnung eine Beschleunigung einer Rückförderung von Druckfarbe von den oberen Farbkastenwalzen auf die Farbkastenwalze 1 ermöglicht werden.The drive 4 of the ink fountain roller 1 is in signal communication with a controller 5, wherein the controller 5 also has a connection with the means for color metering 3 and the drive 8 of the lifting roller 6. Through the connection with the drive 8, the duration of the contact time of the lifting roller 6 on the ink fountain roller 1 can be detected by the controller 5, and also whether this is applied to the ink fountain roller 1 or not. This is done for example by arranged in the drive 8 and the reciprocating movement of the lifting roller 6 detecting signal generator.
Is now by a not shown and standing in signal communication with the controller 5 input device, such as a color control system, the ink supply via the Farbdosierelemente 3 dynamically, ie during the printing process with ongoing color transport, changed responsive to the controller 5 in accordance with the invention in various ways ,
On the one hand, the ink fountain roller 1 is accelerated from the speed value provided for the predetermined pressure situation to a maximum or approximately maximum speed value for the duration of a dynamic adjustment of the ink metering elements 3. As a result, the change in the ink layer on the surface of the ink fountain roller 1 caused by the change in the metering elements is dynamically converted and thus comes into direct contact with the lifter roller 6 more quickly.
For a given, constant investment time of the lifting roller 6 on the ink fountain roller 1 thus a longer so-called lifter strip is generated. Thus, the unwinding length of the surface of the squeegee roller 6 at the ink fountain roller 1 is meant. In the case of an enlarging metering element opening, therefore, more ink is additionally conveyed to the inking unit via the following inking rollers due to the acceleration of the ink fountain roller 1.
On the other hand, even if less ink is to be delivered and the metering orifice is reduced, acceleration of ink pump return from the upper ink fountain rollers to the ink fountain roller 1 is enabled by the acceleration of the ink fountain roller 1 during reduction of the metering element opening.

Wenn die dynamische Verstellung der Farbdosierelemente 3 abgeschlossen ist, wird der Antrieb 4 der Farbkastenwalze 1 so gesteuert, dass wieder der vorherige und für die vorgesehene Drucksituation gewählte Geschwindigkeitswert an der Farbkastenwalze 1 gefahren wird.When the dynamic adjustment of the Farbdosierelemente 3 is completed, the drive 4 of the ink fountain roller 1 is controlled so that again the previous and selected for the intended pressure situation speed value is driven at the ink fountain roller 1.

Zum anderen kann für die Dauer einer dynamischen Verstellung der Farbdosierelemente 3 über die Steuerung 5 die Heberwalze 6 über ihren Antrieb 8 in ihrer hin und hergehenden Bewegung zur Farbkastenwalze 1 so eingestellt werden, dass die durch die Anlagezeit an der Farbkastenwalze 1 bestimmte Heberstreifenbreite von dem für die vorgegebene Drucksituation vorgesehenen Wert auf einen maximalen oder annähernd maximalen Wert der Heberstreifenbreite umgestellt wird. Auch dadurch wird erreicht, dass die durch Veränderung der Dosierelemente bedingte Änderung der Farbschicht auf der Oberfläche der Farbkastenwalze 1 direkt von der Heberwalze 6 auf die nachfolgende Farbwerkswalze 7 gelangt. Wenn die dynamische Verstellung der Farbdosierelemente 3 abgeschlossen ist, wird der Antrieb 8 der Heberwalze 6 so gesteuert, dass wieder der vorherige und für die vorgesehene Drucksituation gewählte Wert der Anlagezeit und damit der Heberstreifenbreite an der Heberwalze 6 gefahren wird.On the other hand, for the duration of a dynamic adjustment of the ink metering 3 via the controller 5, the squeegee 6 can be adjusted via their drive 8 in their reciprocating motion to the ink fountain roller 1, that determined by the investment time at the ink fountain roller 1 Heberstreifenbreite of the the predetermined pressure situation provided value is switched to a maximum or approximately maximum value of the Heberstreifenbreite. This also ensures that the conditional by changing the metering change of the ink layer on the surface of the ink fountain roller 1 passes directly from the squeegee roller 6 to the subsequent inking roller 7. When the dynamic adjustment of the Farbdosierelemente 3 is completed, the drive 8 of the lifting roller 6 is controlled so that again the previous and selected for the intended pressure situation value of investment time and thus the Heberstreifenbreite is moved to the lifting roller 6.

Die Fig. 2a) - 2c) zeigen die prinzipielle Wirkungsweise der Erfindung.
In Fig. 2a) ist die Situation während der ursprünglichen Einstellung der Farbdosierelemente 3 dargestellt. Die Farbkastenwalze 1 fährt den für die Drucksituation vorgegebenen Geschwindigkeitswert (Pfeil), die Heberwalze 6 pendelt zwischen Farbkasten- und nachgeordneter Farbwalze 7.The Fig. 2a) - 2c ) show the principal mode of action of the invention.
In Fig. 2a ) the situation during the initial adjustment of the Farbdosierelemente 3 is shown. The ink fountain roller 1 moves the predetermined speed for the printing situation (arrow), the squeegee 6 oscillates between ink fountain and downstream ink roller. 7

In Fig. 2b) ist eine Veränderung der Farbdosierelemente 3 - hier eine Vergrößerung der Farbzufuhr in Form eines größer eingestellten Spaltes zwischen Farbdosierelement 3 und der Oberfläche der Farbkastenwalze 1- vorgenommen worden. Dies bedingt einen Sprung in der Farbschicht 9 auf der Farbkastenwalze 1. Die Heberwalze 6 hat keinen Kontakt mit der Farbkastenwalze 1. Schon zu diesem Zeitpunkt wird die Geschwindigkeit der Farbkastenwalze 1 auf 99 bis 100 % ihrer Maximalgeschwindigkeit erhöht, so dass die größere Schichtdicke 9 (größer eingestellter Spalt) schneller in den Kontaktbereich mit der Heberwalze 6 kommt und vor allem dann, wenn die dickere Farbschicht mit der Heberwalze 6 in Kontakt ist, ein dickerer und längeren Heberstreifen an Druckfarbe auf der Heberwalze 6 erzeugt und von dieser in das Farbwerk übertragen wird. Die erhöhte Drehzahl der Farbkastenwalze 1 ist durch die Länge des Pfeiles angedeutet.In Fig. 2b ) is a change in the Farbdosierelemente 3 - has been made here an increase in the ink supply in the form of a larger gap between Farbdosierelement 3 and the surface of the ink fountain roller 1-. This causes a jump in the ink layer 9 on the ink fountain roller 1. The squeegee 6 has no contact with the ink fountain roller 1. Even at this time, the speed of the ink fountain roller 1 to 99 to 100% of their Increased maximum speed, so that the greater layer thickness 9 (greater set gap) comes faster in the contact area with the squeegee roller 6 and especially when the thicker ink layer with the squeegee roller 6 in contact, a thicker and longer lifter strip of ink on the squeegee 6 generated and transferred from this in the inking unit. The increased speed of the ink fountain roller 1 is indicated by the length of the arrow.

In Fig. 2c) ist dargestellt, dass nach Berührung der Heberwalze 6 mit der Farbkastenwalze 1 die durch Veränderung der Farbdosierung bewirkte Farbschichtdickenänderung 9 nun auf die Heberwalze 6 übertragen und von dieser dann bei Berührung mit der nachgeordneten Farbwalze 7 an die weiteren Walzen des Farbwerkes übergeben wird. Die Farbkastenwalze 1 wird dabei ständig mit der maximalen oder annähernd maximalen Geschwindigkeit gefahren bis die dynamische Verstellung der Farbdosierelemente 3 beendet ist.In Fig. 2c ) is shown that after touching the squeegee roller 6 with the ink fountain roller 1 caused by changing the ink metering ink layer thickness change 9 is now transferred to the squeegee roller 6 and then transferred from this in contact with the downstream ink roller 7 to the other rollers of the inking unit. The ink fountain roller 1 is constantly driven at the maximum or approximately maximum speed until the dynamic adjustment of the Farbdosierelemente 3 is completed.

In Fig. 2.c) ist die zweite Verfahrensalternative erkennbar. Der durch die Heberwalze 6 von der Farbkastenwalze 1 abgenommene Farbstreifen S ist in seiner als Heberstreifenbreite am Umfang der Heberwalze 6 aufliegenden Farbschicht dargestellt. Diese Heberstreifenbreite kann alternativ während der dynamischen Verstellung der Farbdosierelemente 3 auf einen Wert von 95 bis 100 % des Maximalwertes eingestellt werden. Beabsichtigt wird dabei also erfindungsgemäß, dass während der Zeit der dynamischen Verstellung der Farbdosierelemente 3 eine Maximierung der Anlagezeit zwischen der Farbkastenwalze 1 und der Heberwalze 6 erfolgen soll.In Fig. 2.c) the second alternative is recognizable. The removed by the squeegee roller 6 from the ink fountain roller 1 color strip S is shown in its resting as a Heberstreifenbreite on the circumference of the squeegee roller 6 color layer. This lift strip width can alternatively be set to a value of 95 to 100% of the maximum value during the dynamic adjustment of the color metering elements 3. It is therefore intended according to the invention that, during the period of dynamic adjustment of the ink metering elements 3, a maximization of the investment time between the ink fountain roller 1 and the lifting roller 6 should take place.

Die Verstellung der Geschwindigkeit der Farbkastenwalze und die Verstellung der Heberstreifenbreite bzw. der Anlagezeit zwischen der Farbkastenwalze 1 und der Heberwalze 6 kann in Kombination miteinander ausgeführt werden. Hierbei kann eine Abstimmung in zeitlicher Zuschaltung und Abschaltung vorgesehen sein.The adjustment of the speed of the ink fountain roller and the adjustment of the Heberstreifenbreite or the investment time between the ink fountain roller 1 and the lifting roller 6 can be performed in combination with each other. Here, a vote in time connection and shutdown can be provided.

In jedem Fall wird aber die Verstellung der Geschwindigkeit der Farbkastenwalze 1 und damit auch die Verstellung der Heberstreifenbreite bzw. der Anlagezeit der Heberwalze 6 an der Farbkastenwalze 1 nach Beendigung der dynamischen Verstellung der Farbdosierelemente 3 wieder zurückgenommen.
Danach werden wieder die jeweiligen für eine ausreichende, etwa durch eine Farbregelanlage vorgegebene Farbversorgung des Farbwerkes vorgesehenen Stellwerte eingestellt. Dann wird also die Farbkastenwalze 1 wieder mit einer für die jeweilige Drucksituation vorgesehenen Geschwindigkeit angetrieben wird. Ebenso wird die Heberwalze 6 wieder mit einer für die jeweilige Drucksituation vorgesehenen Heberstreifenbreite betrieben.In any case, but the adjustment of the speed of the ink fountain roller 1 and thus also the adjustment of the Heberstreifenbreite or the investment time of Lifting roller 6 on the ink fountain roller 1 after completion of the dynamic adjustment of the ink metering 3 again withdrawn.
Thereafter, the respective set values provided for a sufficient ink supply of the inking unit, for example by a color control system, are set again. Then, therefore, the ink fountain roller 1 is driven again with a provided for the respective printing situation speed. Likewise, the squeegee roller 6 is operated again with a provided for the respective pressure situation Heberstreifenbreite.

Grundsätzlich ist zu bemerken, dass aus der Erhöhung der Geschwindigkeit der Farbkastenwalze 1 ein größerer bzw. ein längerer Heberstreifen resultiert. Wenn an einem Leitstand einer Druckmaschine eine Heberstreifenbreite verstellt wird, wird für gewöhnlich dabei eine Veränderung der Geschwindigkeit der Farbkastenwalze vorgenommen. Heberstreifenbreite und Geschwindigkeit der Farbkastenwalze sind zueinander proportional.
Weiterhin wird für gewöhnlich die Bewegung der Heberwalze über den Hauptantrieb der Druckmaschine erzeugt, so dass diese von dessen Geschwindigkeit abhängig ist. Eine Veränderung der Heberbewegung an sich ist relativ aufwändig. Diese kann aber dennoch ebenfalls zur Beeinflussung der Anlagezeit der Heberwalze an der Farbkastenwalze genutzt werden, indem ein für die Bewegung der Heberwalze vorgesehenes Hebergetriebe verstellt wird.Basically, it should be noted that increasing the speed of the ink fountain roller 1 results in a larger or a longer lifter strip. When a squeegee width is adjusted at a control station of a printing press, a change in the speed of the ink fountain roller is usually made. Lifting strip width and speed of the ink fountain roller are proportional to each other.
Furthermore, the movement of the squeegee roller is usually generated via the main drive of the printing press, so that it depends on its speed. A change in the lifting movement itself is relatively complex. However, this can also be used to influence the investment time of the squeegee roller on the ink fountain roller by a provided for the movement of the siphon Hebergetriebe is adjusted.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
FarbkastenwalzeInk fountain roller
22
Farbkastenpaintbox
33
Farbdosierungink metering
44
Antrieb (Farbkastenwalze 1)Drive (ink fountain roller 1)
55
Steuerungcontrol
66
Heberwalzevibrator roller
77
Farbwalzeink roller
88th
Antrieb (Heberwalze 6)Drive (lift roller 6)
99
Farbschichtcoat of paint
BB
HeberstreifenbreiteHeber strip width

Claims (10)

  1. A method for controlling the ink feed in inking units embodied as ductor inking unit of sheet-fed offset printing presses, in which a printing ink from an ink supply intended for printing is provided via an ink metering system (3), which interacts with an ink fountain roller (1), and is further transported by a ductor roller (6), which is moved back and forth between the ink fountain roller (1) and a downstream inking roller (7), which is embodied as first of a plurality of inking unit rollers, wherein the ink fountain roller (1) is driven at a specified speed, characterized in that the amount of ink transported by the ink fountain roller (1) via the ductor roller (6) is set to a maximum value or to 99 - 100% of the maximum value or to 95 - 100% of the maximum value in the case of a setting of the ink metering system, which is qualified as being dynamic, for the duration of a dynamic adjustment of the ink metering elements (3).
  2. The method according to claim 1, characterized in that the speed of the ink fountain roller (1) is set to a maximum value or approximately the maximum value in the case of a setting of the ink metering system, which is qualified as being dynamic, for the duration of the dynamic adjustment of the ink metering elements (3).
  3. The method according to claim 1 or 2, characterized in that the speed of the ink fountain roller (1) is set to a value of between 99 and 100% of the maximum speed.
  4. The method according to claim 1, characterized in that the ductor strip width or the engagement time of the ductor roller (6) with the ink fountain roller (1) is set to the maximum value or approximately a maximum value by means of the drive of the ductor roller (6) in the case of a setting of the ink metering system, which is qualified as being dynamic, for the duration of the dynamic adjustment of the ink metering elements (3)
  5. The method according to one or a plurality of claims 1 and 4, characterized in that the ductor strip width or engagement time of the ductor roller (6) with the ink fountain roller (1) is set to a value of between 95 and 100% of the ductor strip width or engagement time of the ductor roller (6) with the ink fountain roller (1), which can be maximally adjusted via the ductor drive.
  6. The method according to one or a plurality of claims 1 to 5, characterized in that the setting of the maximum or approximately maximum speed of the ink fountain roller (1) and the setting of the maximum or approximately maximum ductor strip width or engagement time of the ductor roller (6) with the ink fountain roller (1) are combined so as to match one another or are performed simultaneously.
  7. An inking unit for carrying out the method according to claim 1, comprising an ink fountain roller (1), which has a drive and can be moved at specifiable speed values, an ink metering system, which interacts with the ink fountain roller (1) by means of ink metering elements (3), which are provided with actuators, a ductor roller (6), which is arranged downstream from the ink fountain roller (1) and which can be moved back and forth by means of a drive between the ink fountain roller (1) and a further inking roller (7), which is embodied as first ink fountain roller, as well as a controller, which is in signal communication with the actuators of the ink metering elements (3) and/or the drive of the ink fountain roller (1) and/or the drive of the ductor roller (6), characterized in that the speed of the ink fountain roller (1) can be set at the drive (4) of the ink fountain roller (1) to a maximum value or to 99% - 100% of the maximum value by means of a controller (5) in the case of a setting of the ink metering system, which is qualified as being dynamic, for the duration of a dynamic adjustment of the ink metering elements (3).
  8. The inking unit according to claim 7, characterized in that the drive (4) of the ink fountain roller (1) has a controller, which displays the speed of the ink fountain roller (1) by means of one or a plurality of signal generators as a function of a functional position with respect to the movement of the actuators of the ink metering elements (3) in response to the adjustment thereof.
  9. An inking unit for carrying out the method according to claim 4, comprising an inking unit roller (1), which has a drive and which can be moved with specifiable speed values, an ink metering system, which interacts with the ink fountain roller (1), by means of ink metering elements (3), which are provided with actuators, a ductor roller (6), which is arranged downstream from the ink fountain roller (1) and which can be moved back and forth by means of a drive between the ink fountain roller (1) and a further inking roller (7), which is embodied as first ink fountain roller, as well as a controller, which is in signal communication with the ink metering elements (3), the drive of the ink fountain roller (1) as well as the ductor roller (6), characterized in that the ductor strip width of the ductor roller (6) or the engagement time of the ductor roller (6) with the ink fountain roller (1) can be set by the ink fountain roller (1) to a maximum value or to 99% - 100% of the maximum value or to 95% - 100% of the maximum value in order to remove the ink from the ink fountain roller (1) in the case of a setting of the ink metering system, which is qualified as being dynamic, for the duration of the dynamic adjustment of the ink metering elements (3) by means of the controller (5) via the drive (4) of the ductor roller (6).
  10. The inking unit according to claim 9, characterized in that the drive (8) of the ductor roller (6) has a controller, which, by means of one or a plurality of signal generators, displays the position of the ductor roller (6) to the ink fountain roller (1) and a functional position with respect to the movement of the actuators of the ink metering elements (3) in response to the adjustment thereof.
EP15748237.3A 2014-08-09 2015-08-07 Highly dynamic ink density control Active EP3177464B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102014011865 2014-08-09
DE102015101497.1A DE102015101497A1 (en) 2014-08-09 2015-02-03 Highly dynamic color density control
PCT/EP2015/068274 WO2016023829A1 (en) 2014-08-09 2015-08-07 Highly dynamic ink density control

Publications (2)

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EP3177464A1 EP3177464A1 (en) 2017-06-14
EP3177464B1 true EP3177464B1 (en) 2018-10-31

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US (1) US20170225451A1 (en)
EP (1) EP3177464B1 (en)
JP (1) JP2017523069A (en)
CN (1) CN106536203A (en)
DE (1) DE102015101497A1 (en)
WO (1) WO2016023829A1 (en)

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DE2340300C3 (en) * 1973-08-09 1979-09-13 Roland Offsetmaschinenfabrik Faber & Schleicher Ag, 6050 Offenbach Ink fountain roller for a lifter inking unit on printing machines
DE3904301A1 (en) 1989-02-14 1990-08-16 Felix Brunner Method on a multi-colour printing machine operating by the halftone process to achieve a preselected printing result
DE19753944C2 (en) * 1997-12-05 2002-06-06 Roland Man Druckmasch Method for controlling a lifter inking unit of a printing press
DE19800475A1 (en) * 1998-01-09 1999-07-15 Koenig & Bauer Ag Method and device for influencing the color distribution
DE19815293A1 (en) * 1998-04-06 1999-10-07 Heidelberger Druckmasch Ag Printing press and method for operating a printing press
DE29807277U1 (en) * 1998-04-22 1998-07-02 MAN Roland Druckmaschinen AG, 63075 Offenbach Control for a jack inking unit of a printing machine
EP1010527B1 (en) * 1998-12-11 2003-04-02 Koenig & Bauer Aktiengesellschaft Method for setting a production run ink zone profile
DE10242278A1 (en) 2002-09-12 2004-03-25 Man Roland Druckmaschinen Ag Ink supply control method for an offset printing machine, wherein the ink reservoir roller is driven at an increased rotation speed if the ink settings are changed while it is not in contact with the siphon roller
DE102007019471B4 (en) * 2006-05-15 2017-12-14 Heidelberger Druckmaschinen Ag Method for controlling an inking unit of a printing machine
US20070283830A1 (en) * 2006-05-15 2007-12-13 Heidelberger Druckmaschinen Ag Method for controlling an inking unit of a printing press
CN101337456B (en) * 2008-03-03 2010-09-08 深圳市大族激光科技股份有限公司 Ink-amount control device of printer
DE102009045559A1 (en) * 2009-10-12 2011-04-14 Manroland Ag Method for operating color deck of printing machine, involves providing color box in color deck and holding printing color in color box

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WO2016023829A1 (en) 2016-02-18
DE102015101497A1 (en) 2016-02-11
EP3177464A1 (en) 2017-06-14
CN106536203A (en) 2017-03-22
JP2017523069A (en) 2017-08-17
US20170225451A1 (en) 2017-08-10

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