EP1990197B1 - Method for automatically adjusting a rotation body pressing in a printing machine - Google Patents

Method for automatically adjusting a rotation body pressing in a printing machine Download PDF

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Publication number
EP1990197B1
EP1990197B1 EP08103604.8A EP08103604A EP1990197B1 EP 1990197 B1 EP1990197 B1 EP 1990197B1 EP 08103604 A EP08103604 A EP 08103604A EP 1990197 B1 EP1990197 B1 EP 1990197B1
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EP
European Patent Office
Prior art keywords
rotary body
pressure
pressure strip
rotary
image
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EP08103604.8A
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German (de)
French (fr)
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EP1990197B2 (en
EP1990197A2 (en
EP1990197A3 (en
Inventor
Dieter Schaffrath
Felix Dorenkamp
Peter Heiler
Ulrich Luckhardt
Martin Mayer
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Heidelberger Druckmaschinen AG
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Heidelberger 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
    • B41F33/0072—Devices for measuring the pressure between cylinders or bearer rings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/30—Arrangements for tripping, lifting, adjusting, or removing inking rollers; Supports, bearings, or forks therefor
    • B41F31/304—Arrangements for inking roller bearings, forks or supports
    • B41F31/308—Swinging bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0036—Devices for scanning or checking the printed matter for quality control

Definitions

  • the present invention relates to a method for the automated adjustment of a rotational body pressure in a printing press, wherein a press strip image measurement is carried out on a printing material, according to the preamble of claim 1.
  • rollers and cylinders When setting up a printing machine, their adjacent rollers and cylinders must be adjusted so that the existing in the nips between them pressing has the required level. Since of the two each forming a nip rotational bodies, d. H. Rollers or cylinders, usually at least one has a rubber-elastic peripheral surface, the latter is flattened as a result of the pressure. This flattening is also referred to as a contact or pressing strip and has a width to be measured transversely to the roll rotation axis, the so-called pressing strip width.
  • the press strip width can serve as a measure of the set pressure and be measured in various ways.
  • the measured variable for the control is the color density, which is measured online or offline with a densitometer.
  • the nip width produced in a nip between a fountain roller and a plate cylinder is measured from a nip image which has been transferred to the signature.
  • the measurement of the press strip image is done by optoelectronic scanning.
  • the measuring signals of the used sensor optoelectronic scanning are transmitted to a control or regulating device, which generates therefrom control signals for driving an actuator, which adjusts the inking roller such that between the latter and the plate cylinder the required pressure is present.
  • the invention is therefore based on the object of specifying a roll adjustment method which meets the complexity of roller inking.
  • the method according to the invention for the automatic adjustment of a rotational body pressure in a printing press, wherein a press strip image measurement is performed on a printing material is characterized in that an image of a first press strip, which is formed by a first rotary body together with a second rotary body, and an image of a second pressing strip, which is formed by the second rotary body together with a third rotary body, are measured, and that the rotary body pressing is automatically adjusted.
  • This method does justice to the complexity of modern roller inking systems because it allows for consideration of the interactions therein.
  • a first servo motor and a second servo motor are controlled by an electronic control device as a function of measuring signals of a measuring device for measuring the two images of the two pressing strips in order to adjust the pressing strips.
  • a first Actuator in the main effect or primarily the second pressing strip and set in secondary effect or secondarily the first pressing strip.
  • this can be done by the second Actuator in the main effect or primarily the first pressing strip and in the secondary effect or secondarily the second pressing strip can be adjusted.
  • the second rotary body and the third rotary body are adjusted by the two servo motors in a position relative to the first rotary body, in which a common center centers of the first body of rotation and the second body of revolution and a common center of the second center of rotation and the third body of revolution non-rectangular angle greater than 0 ° and less than 180 °.
  • a final target value of the width of the first press strip and a final target value of the width of the second press strip are set based on the measurement of only the image of the first press strip and the image of the second press strip and no further image of the two press strips.
  • the final target value of the width of the first press strip and the final target value of the width of the second press strip is set by a single measurement of the images subsequent to the first servo motor and a single image motor subsequent to the second motor.
  • a forme cylinder is used as the first rotary body, an inking roller as the second rotary body, and a rubbing roller as the third rotary body.
  • the two images are measured on one and the same sheet.
  • the two pressing strips are static pressing strips, which are generated in the case of rotary standstill of the rotating bodies between them.
  • FIG. 1 shows a first rotary body 1, a second rotary body 2 and a third rotary body 3 as components of a printing machine 4.
  • the first rotary body 1 is a forme cylinder for lithographic offset printing.
  • the second rotary body 2 is an inking roller with rubber-elastic peripheral surface and is located in the printing operation on the first rotary body 1 at.
  • the third rotary body 3 is a friction roller, which is axially oscillated and provided with a coaxial drive gear, and abuts against the second rotary body 2.
  • a common, first center center 11 of the first and second rotating bodies 1, 2 and a common, second center center 12 of the second and third rotating bodies 2, 3 close one Angle ⁇ a.
  • the angle ⁇ between the central centers 11, 12 is greater than 0 ° and less than 180 °, but not a right angle, but an obtuse angle.
  • a third lever 23 is fixed to the first lever 21, in which a roller 16 is rotatably mounted, which is supported on a cam 17.
  • an electric, first servomotor 31 for pivoting the second lever 22 about the pivot joint 14 is arranged on the second lever 22.
  • the first servomotor 31 engages via a worm gear 18 on a first arm of the second lever 22.
  • the second rotary body 2 is mounted on a second arm of the second lever 22 .
  • an electric, second actuator 32 is attached, which acts via a further worm gear 19 on the third lever 23 to pivot the latter together with the roller 16 mounted therein about the hinge 15.
  • the first lever 21 is pivoted about the center 13 of the third rotary body 3.
  • the actuation of the second servomotor 32 serves the pressure in a common, first nip 41 (see. FIG. 2 ) of the first and second rotary bodies 1, 2 to dose the fluid or color quantity transferred from the second rotary body 2 to the first rotary body 1.
  • the actuation of the first servomotor 31 serves to reduce the pressure in a common, second nip 42 (cf. FIG. 2 ) of the second and third rotating bodies 2, 3 to dose the quantity of fluid or ink transferred from the third rotating body 3 to the second rotating body 2.
  • the angle ⁇ is not a right angle, it is structurally unavoidable that the actuation of the first actuator 31 not only causes the desired adjustment of a press strip width b in the second nip 42, but also as an undesirable side effect on the size of a Press strip width a in the first nip 41 effects.
  • FIG. 2 shows the trigonometric conditions of the storage of the rotating body 1, 2 and 3 in a schematic representation. It can be seen that the size of the angle ⁇ deviating from 90 ° necessarily means that the adjustment of the roll provision made for the second nip 42 adversely affects the roll provision in the first nip 41.
  • FIG. 3 shows a flow chart of a method for automatic roll adjustment.
  • the start takes place.
  • a washing of the inking unit comprising the second and third rotary bodies 2, 3 and of the printing unit, which in addition to the first rotary body 1 also comprises a blanket cylinder resting against the first rotary body 1 in the printing operation is carried out first.
  • the method step 51 includes that at a Farbzonendosier worn a color box of the inking the metering, z. B. metering with zone screws, are set so that all ink zones are the same wide open and over the print width in all ink zones an equal amount of ink is metered.
  • an inlet of the ink from the ink fountain into the inking unit wherein in this ink inlet an inking unit coordinated dampening unit is inactive.
  • the roll adjustment process is performed immediately after a print job is performed, the washing, the uniform adjustment of the ink zone openings, and the ink feed can be omitted. In this case, only the dampening unit is deactivated, so that it no longer promotes dampening solution.
  • the inking rollers will become including the second rotary body 2 and a dampening roller of the dampening unit to the first rotary body 1 employed to transfer the ink from the inking unit to the first rotary body 1 and the offset printing form located thereon.
  • This transfer of color takes place without a transfer of the dampening solution to the offset printing form, so that the latter also assumes the printing ink in the non-printing, hydrophilic areas, which would otherwise be kept free of color by the dampening solution. Therefore, in the process variant in which the roll adjustment takes place immediately following the execution of the print job, in the roll adjustment that offset printing form on the first rotation body 1 which has been used for this print job can be retained.
  • an offset printing forme which is specially provided for the roll adjustment, is clamped onto the first rotary body 1.
  • This special offset printing form has a homogeneous print image, so that the deactivation of the dampening unit is not required.
  • a static contact or pressing strip in the first nip 41 (cf. FIG. 2 ) and in a parallel process step 53, a static contact or pressure strip in the second nip 42 is generated.
  • the rotation of the first rotary body 1 and the application rollers lying on the latter including the second rotary body 2 and the rotation of the third rotary body 3 is stopped in a rotational angular position in which the leading edge of the offset printing form immediately after the last in the direction of rotation of the first rotary body 1 of the inking rollers stands. Due to the standstill and the static pressure in the nips 41, 42, the ink is pressed out of these nips.
  • the width of the pressing strips transmitted to the printed sheets is determined. For this purpose, the one selected from the printed 5 to 10 sheet on which the two pressing strips are best recognizable.
  • the opto-electronic, z. B. densitometric, measuring device 24 For measuring the widths of the images of the pressing strips on the printing substrate 25, d. H. on the printed sheet with the clearest images, this is placed on a measuring table, the opto-electronic, z. B. densitometric, measuring device 24 has.
  • FIG. 4 shows that this measuring device 24 is connected to an electronic control device 20, which in turn is connected to the servomotors 31, 32 (see. FIG. 1 ).
  • the control device 20 calculates the required correction values of the employment of the second to the first rotation body and the employment of the second to the third rotation body in a method step 56.
  • the control device 20 takes into account the fact already explained that the change in the setting of the second to the third rotary body entails a change in the setting of the second to the first rotary body.
  • the correction calculation of the two jobs d. H. the center distances between the first and second rotation body and between the second and third rotation body, the influence of one of the other employment by the control means 20 based on stored therein mathematical formulas, for. B.
  • a trigonometric context descriptive polynomial model or based on a stored in the control unit 20 table of values whose value pairs are determined in an analytical manner according to the aforementioned formula or are determined experimentally, or based on a corresponding function curve are taken into account.
  • control device 20 controls the servo motors 31, 32 in such a way that in a method step 57, the second servomotor 32 moves to the newly calculated target value for setting the second to the first rotary body and in a simultaneous or parallel process step 58 of FIG first servomotor 31 moves the newly calculated target value of the employment of the second to the third rotary body.

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)

Description

Die vorliegende Erfindung betrifft ein Verfahren zum automatisierten Justieren einer Rotationskörperpressung in einer Druckmaschine, wobei eine Pressstreifenabbild-Messung auf einem Bedruckstoff erfolgt, nach dem Oberbegriff des Anspruchs 1.The present invention relates to a method for the automated adjustment of a rotational body pressure in a printing press, wherein a press strip image measurement is carried out on a printing material, according to the preamble of claim 1.

Beim Einrichten einer Druckmaschine müssen deren aneinander anliegenden Walzen und Zylinder derart justiert werden, dass die in den Walzenspalten zwischen ihnen vorhandene Pressung das erforderliche Maß aufweist. Da von den beiden jeweils einen Walzenspalt bildenden Rotationskörpern, d. h. Walzen oder Zylindern, in der Regel mindestens einer eine gummielastische Umfangsfläche aufweist, wird letztere infolge der Pressung abgeplattet. Diese Abplattung wird auch als Kontakt- oder Pressstreifen bezeichnet und hat eine quer zur Walzenrotationsachse zu messende Breite, die sogenannte Pressstreifenbreite. Die Pressstreifenbreite kann als Maß für die eingestellte Pressung dienen und auf verschiedene Weise gemessen werden.When setting up a printing machine, their adjacent rollers and cylinders must be adjusted so that the existing in the nips between them pressing has the required level. Since of the two each forming a nip rotational bodies, d. H. Rollers or cylinders, usually at least one has a rubber-elastic peripheral surface, the latter is flattened as a result of the pressure. This flattening is also referred to as a contact or pressing strip and has a width to be measured transversely to the roll rotation axis, the so-called pressing strip width. The press strip width can serve as a measure of the set pressure and be measured in various ways.

In DE 42 11 379 A1 werden zwei Abdruckbreiten automatisch geregelt. Als Messgröße für die Regelung dient die Farbdichte, die mit einem Densitometer online oder offline gemessen wird.In DE 42 11 379 A1 Two print widths are automatically controlled. The measured variable for the control is the color density, which is measured online or offline with a densitometer.

In DE 10 2005 048 367 A1 ist ein Verfahren zur Ermittlung einer zwischen zwei Rotationskörpern gebildeten Nipbreite beschrieben. Die Breite des Nips wird während eines Durchlaufs eines Umfangpunktes durch den Nip ermittelt.In DE 10 2005 048 367 A1 a method for determining a nip width formed between two bodies of revolution is described. The width of the nip is determined during a pass of a circumferential point through the nip.

In DE 102 11 870 A1 wird ein von einer Reibwalze zusammen mit einer Farbauftragwalze erzeugter Pressstreifen mittels eines CCD-Sensors überprüft, welcher dazu auf die Farbauftragwalze gerichtet wird. Damit ein deutlicher Abdruck des Pressstreifens auf der Farbauftragwalze erzeugt wird, werden die aufeinander gepressten Walzen für eine bestimmte Zeitspanne im Stillstand gehalten. Danach werden die Walzen in eine Position gedreht, in welcher der Pressstreifenabdruck auf der Farbauftragwalze für den CCD-Sensor gut zugänglich ist.In DE 102 11 870 A1 For example, a pressing strip produced by a rubbing roller together with an inking roller is checked by means of a CCD sensor, which is for this purpose directed onto the inking roller. So that a clear impression of the pressing strip is produced on the inking roller, the pressed-together rollers for a certain period held at a standstill. Thereafter, the rollers are rotated to a position in which the Pressstreifenabdruck on the inking roller for the CCD sensor is easily accessible.

In DE 44 27 967 B4 wird die in einem Walzenspalt zwischen einer Farbauftragwalze und einem Druckformzylinder erzeugte Pressstreifenbreite anhand eines Pressstreifenabbildes gemessen, welches auf den Druckbogen übertragen worden ist. Das Ausmessen des Pressstreifenabbildes erfolgt per optoelektronischer Abtastung. Die Messsignale des zur optoelektronischen Abtastung verwendeten Sensors werden an eine Steuer- oder Regelvorrichtung übermittelt, die davon ausgehend Stellsignale zum Ansteuern eines Stellantriebs generiert, welcher die Farbauftragwalze derart justiert, dass zwischen dieser und dem Druckformzylinder die erforderliche Pressung vorhanden ist.In DE 44 27 967 B4 For example, the nip width produced in a nip between a fountain roller and a plate cylinder is measured from a nip image which has been transferred to the signature. The measurement of the press strip image is done by optoelectronic scanning. The measuring signals of the used sensor optoelectronic scanning are transmitted to a control or regulating device, which generates therefrom control signals for driving an actuator, which adjusts the inking roller such that between the latter and the plate cylinder the required pressure is present.

Durch die Messung allein des in dem Walzenspalt zwischen der Farbauftragwalze und dem Druckformzylinder gebildeten Pressstreifens wird der in konstruktiver und funktioneller Hinsicht vorhandenen Komplexität moderner Walzenfarbwerke nur ungenügend Rechnung getragen.By measuring only the pressure strip formed in the nip between the inking roller and the printing forme cylinder, the complexity of modern roller inking systems, which is present in a constructive and functional respect, is insufficiently taken into account.

Deshalb liegt der Erfindung die Aufgabe zugrunde, ein der Komplexität von Walzenfarbwerk gerecht werdendes Walzenjustageverfahren anzugeben.The invention is therefore based on the object of specifying a roll adjustment method which meets the complexity of roller inking.

Diese Aufgabe wird durch ein Verfahren mit den Merkmalen des Anspruchs 1 gelöst. Das erfindungsgemäße Verfahren zum automatisierten Justieren einer Rotationskörperpressung in einer Druckmaschine, wobei eine Pressstreifenabbild-Messung auf einem Bedruckstoff erfolgt, ist dadurch gekennzeichnet, dass ein Abbild eines ersten Pressstreifens, der von einem ersten Rotationskörper zusammen mit einem zweiten Rotationskörper gebildet wird, und ein Abbild eines zweiten Pressstreifens, der von dem zweiten Rotationskörper zusammen mit einem dritten Rotationskörper gebildet wird, vermessen werden und dass die Rotationskörperpressung automatisiert justiert wird. Dieses Verfahren wird der Komplexität moderner Walzenfarbwerke gerecht, weil es eine Berücksichtigung der darin gegebenen Wechselwirkungen ermöglicht.This object is achieved by a method having the features of claim 1. The method according to the invention for the automatic adjustment of a rotational body pressure in a printing press, wherein a press strip image measurement is performed on a printing material, is characterized in that an image of a first press strip, which is formed by a first rotary body together with a second rotary body, and an image of a second pressing strip, which is formed by the second rotary body together with a third rotary body, are measured, and that the rotary body pressing is automatically adjusted. This method does justice to the complexity of modern roller inking systems because it allows for consideration of the interactions therein.

In den Unteransprüchen sind vorteilhafte Weiterbildungen des erfindungsgemäßen Verfahrens genannt.In the dependent claims advantageous developments of the method according to the invention are mentioned.

Bei einer Weiterbildung werden durch eine elektronische Steuerungseinrichtung in Abhängigkeit von Messsignalen einer Messeinrichtung zum Messen der beiden der Abbilder der beiden Pressstreifen ein erster Stellmotor und ein zweiter Stellmotor angesteuert, um die Pressstreifen einzustellen. Vorzugsweise wird hierbei durch den ersten Stellmotor im Haupteffekt oder primär der zweite Pressstreifen und im Nebeneffekt oder sekundär der erste Pressstreifen eingestellt. Außerdem kann hierbei durch den zweiten Stellmotor im Haupteffekt oder primär der erste Pressstreifen und im Nebeneffekt oder sekundär der zweite Pressstreifen eingestellt werden.In a further development, a first servo motor and a second servo motor are controlled by an electronic control device as a function of measuring signals of a measuring device for measuring the two images of the two pressing strips in order to adjust the pressing strips. Preferably, in this case by the first Actuator in the main effect or primarily the second pressing strip and set in secondary effect or secondarily the first pressing strip. In addition, this can be done by the second Actuator in the main effect or primarily the first pressing strip and in the secondary effect or secondarily the second pressing strip can be adjusted.

Bei einer weiteren Weiterbildung werden durch die beiden Stellmotore der zweite Rotationskörper und der dritte Rotationskörper in eine Position relativ zu dem ersten Rotationskörper verstellt, in welcher eine gemeinsame Mittelpunktzenträle des ersten Rotationskörpers und des zweiten Rotationskörpers und eine gemeinsame Mittelpunktzentrale des zweiten Rotationskörpers und des dritten Rotationskörpers einen nicht-rechtwinkligen Winkel einschließen, der größer als 0° und kleiner 180° ist.In a further development, the second rotary body and the third rotary body are adjusted by the two servo motors in a position relative to the first rotary body, in which a common center centers of the first body of rotation and the second body of revolution and a common center of the second center of rotation and the third body of revolution non-rectangular angle greater than 0 ° and less than 180 °.

Bei einer weiteren Weiterbildung werden ein endgültiger Zielwert der Breite des ersten Pressstreifens und ein endgültiger Zielwert der Breite des zweiten Pressstreifens auf Grundlage der Ausmessung nur des Abbildes des ersten Pressstreifens und des Abbildes des zweiten Pressstreifens und keines weiteren Abbildes der beiden Pressstreifen eingestellt. Vorzugsweise wird hierbei der endgültige Zielwert der Breite des ersten Pressstreifens und der endgültige Zielwert der Breite des zweiten Pressstreifens durch einen einzigen der Ausmessung der Abbilder nachfolgenden Motorlauf des ersten Stellmotors und einen einzigen der Ausmessung der Abbilder nachfolgenden Motorlauf des zweiten Stellmotors eingestellt.In a further development, a final target value of the width of the first press strip and a final target value of the width of the second press strip are set based on the measurement of only the image of the first press strip and the image of the second press strip and no further image of the two press strips. Preferably, in this case, the final target value of the width of the first press strip and the final target value of the width of the second press strip is set by a single measurement of the images subsequent to the first servo motor and a single image motor subsequent to the second motor.

Bei einer weiteren Weiterbildung werden als der erste Rotationskörper ein Formzylinder, als der zweite Rotationskörper eine Farbauftragwalze und als der dritte Rotationskörper eine Reibwalze verwendet.In a further development, a forme cylinder is used as the first rotary body, an inking roller as the second rotary body, and a rubbing roller as the third rotary body.

Bei einer weiteren Weiterbildung werden die beiden Abbilder auf ein und demselben Druckbogen ausgemessen.In a further development, the two images are measured on one and the same sheet.

Bei einer weiteren Weiterbildung sind die beiden Pressstreifen statische Pressstreifen, welche bei rotativem Stillstand der Rotationskörper zwischen diesen erzeugt werden. Weitere in konstruktiver und funktioneller Hinsicht vorteilhafte Weiterbildungen der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines bevorzugten Ausführungsbeispiels und der dazugehörigen Zeichnung.In a further development, the two pressing strips are static pressing strips, which are generated in the case of rotary standstill of the rotating bodies between them. Other advantageous in constructive and functional respects further developments of the invention will become apparent from the following description of a preferred embodiment and the accompanying drawings.

In dieser zeigt:

Figur 1
einen Formzylinder, eine Farbauftragwalze und eine Reibwalze, zwischen denen die Pressung eingestellt wird,
Figur 2
ein die geometrischen Besonderheiten der Anordnung der Rotationskörper aus Figur 1 zeigendes Schema,
Figur 3
ein Ablaufdiagramm für das Justieren der Pressstreifen zwischen den Rotationskörpern und
Figur 4
eine Mess- und Steuerungseinrichtung zur automatisierten Durchführung des Justage-Verfahrens.
In this shows:
FIG. 1
a form cylinder, an inking roller and a friction roller, between which the pressure is adjusted,
FIG. 2
one out the geometric peculiarities of the arrangement of the rotation body FIG. 1 showing scheme,
FIG. 3
a flow chart for adjusting the pressure strip between the rotating bodies and
FIG. 4
a measuring and control device for the automated implementation of the adjustment method.

Figur 1 zeigt einen ersten Rotationskörper 1, einen zweiten Rotationskörper 2 und einen dritten Rotationskörper 3 als Bestandteile einer Druckmaschine 4. Der erste Rotationskörper 1 ist ein Formzylinder für den lithographischen Offsetdruck. Der zweite Rotationskörper 2 ist eine Farbauftragwalze mit gummielastischer Umfangsfläche und liegt im Druckbetrieb an dem ersten Rotationskörper 1 an. Der dritte Rotationskörper 3 ist eine Reibwalze, die axial changiert und mit einem koaxialen Antriebszahnrad versehen ist, und liegt an dem zweiten Rotationskörper 2 an. Eine gemeinsame, erste Mittelpunktzentrale 11 des ersten und zweiten Rotationskörpers 1, 2 und eine gemeinsame, zweite Mittelpunktzentrale 12 des zweiten und dritten Rotationskörpers 2, 3 schließen einen Winkel α ein. Der zwischen den Mittelpunktzentralen 11, 12 liegende Winkel α ist größer als 0° und kleiner als 180°, jedoch kein rechter Winkel, sondern ein stumpfer Winkel. FIG. 1 shows a first rotary body 1, a second rotary body 2 and a third rotary body 3 as components of a printing machine 4. The first rotary body 1 is a forme cylinder for lithographic offset printing. The second rotary body 2 is an inking roller with rubber-elastic peripheral surface and is located in the printing operation on the first rotary body 1 at. The third rotary body 3 is a friction roller, which is axially oscillated and provided with a coaxial drive gear, and abuts against the second rotary body 2. A common, first center center 11 of the first and second rotating bodies 1, 2 and a common, second center center 12 of the second and third rotating bodies 2, 3 close one Angle α a. The angle α between the central centers 11, 12 is greater than 0 ° and less than 180 °, but not a right angle, but an obtuse angle.

Um die Rotationsachse bzw. den Mittelpunkt 13 des dritten Rotationskörpers 3 schwenkbar gelagert ist ein erster Hebel 21, an welchem über ein Drehgelenk 14 ein zweiter Hebel 22 befestigt ist. Über ein weiteres Drehgelenk 15 ist an dem ersten Hebel 21 ein dritter Hebel 23 befestigt, in welchem eine Rolle 16 drehbar gelagert ist, die auf einer Steuerkurve 17 abgestützt ist. Durch Schwenken der Steuerkurve 17 um den Mittelpunkt des ersten Rotationskörpers 1 kann der erste Hebel 21 mitsamt des zweiten und dritten Hebels 22, 23 um den Mittelpunkt 13 des dritten Rotationskörpers 3 geschwenkt werden, um den zweiten Rotationskörper 2 an und von dem ersten Rotationskörper 1 an- und abzustellen.A first lever 21, to which a second lever 22 is fastened via a rotary joint 14, is mounted so as to be pivotable about the axis of rotation or the center point 13 of the third rotary body 3. About a further rotary joint 15, a third lever 23 is fixed to the first lever 21, in which a roller 16 is rotatably mounted, which is supported on a cam 17. By pivoting the control cam 17 about the center of the first rotation body 1, the first lever 21 together with the second and third levers 22, 23 are pivoted about the center 13 of the third rotation body 3, to the second rotation body 2 on and from the first rotation body 1 at - and turn off.

An dem zweiten Hebel 22 ist ein elektrischer, erster Stellmotor 31 zum Schwenken des zweiten Hebels 22 um das Drehgelenk 14 angeordnet. Der erste Stellmotor 31 greift über ein Schraubengetriebe 18 an einem ersten Arm des zweiten Hebels 22 an. In einem zweiten Arm des zweiten Hebels 22 ist der zweite Rotationskörper 2 gelagert. An dem ersten Hebel 21 ist ein elektrischer, zweiter Stellmotor 32 befestigt, der über ein weiteres Schraubengetriebe 19 an dem dritten Hebel 23 angreift, um letzteren mitsamt der darin gelagerten Rolle 16 um das Drehgelenk 15 zu schwenken. Infolge dieses Schwenkens des dritten Hebels 23 wird der erste Hebel 21 um den Mittelpunkt 13 des dritten Rotationskörpers 3 geschwenkt.On the second lever 22, an electric, first servomotor 31 for pivoting the second lever 22 about the pivot joint 14 is arranged. The first servomotor 31 engages via a worm gear 18 on a first arm of the second lever 22. In a second arm of the second lever 22, the second rotary body 2 is mounted. On the first lever 21, an electric, second actuator 32 is attached, which acts via a further worm gear 19 on the third lever 23 to pivot the latter together with the roller 16 mounted therein about the hinge 15. As a result of this pivoting of the third lever 23, the first lever 21 is pivoted about the center 13 of the third rotary body 3.

Die Betätigung des zweiten Stellmotors 32 dient dazu, die Pressung in einem gemeinsamen, ersten Walzenspalt 41 (vgl. Figur 2) des ersten und zweiten Rotationskörpers 1, 2 einzustellen, um die vom zweiten Rotationskörper 2 auf den ersten Rotationskörper 1 übertragene Fluid- bzw. Farbmenge zu dosieren.The actuation of the second servomotor 32 serves the pressure in a common, first nip 41 (see. FIG. 2 ) of the first and second rotary bodies 1, 2 to dose the fluid or color quantity transferred from the second rotary body 2 to the first rotary body 1.

Die Betätigung des ersten Stellmotors 31 dient dazu, die Pressung in einem gemeinsamen, zweiten Walzenspalt 42 (vgl. Figur 2) des zweiten und dritten Rotationskörpers 2, 3 einzustellen, um die vom dritten Rotationskörper 3 auf den zweiten Rotationskörper 2 übertragene Fluid- bzw. Farbmenge zu dosieren.The actuation of the first servomotor 31 serves to reduce the pressure in a common, second nip 42 (cf. FIG. 2 ) of the second and third rotating bodies 2, 3 to dose the quantity of fluid or ink transferred from the third rotating body 3 to the second rotating body 2.

Aufgrund dessen, dass der Winkel α kein rechter Winkel ist, ist es konstruktiv bedingt unvermeidlich, dass die Betätigung des ersten Stellantriebs 31 nicht nur die gewünschte Justage einer Pressstreifenbreite b in dem zweiten Walzenspalt 42 bewirkt, sondern sich als unerwünschte Nebenwirkung auch auf die Größe einer Pressstreifenbreite a in dem ersten Walzenspalt 41 auswirkt.Due to the fact that the angle α is not a right angle, it is structurally unavoidable that the actuation of the first actuator 31 not only causes the desired adjustment of a press strip width b in the second nip 42, but also as an undesirable side effect on the size of a Press strip width a in the first nip 41 effects.

Figur 2 zeigt die trigonometrischen Gegebenheiten der Lagerung der Rotationskörper 1, 2 und 3 in schematischer Darstellung. Daraus wird ersichtlich, dass die von 90° abweichende Größe des Winkels α zwangsläufig bedingt, dass die für den zweiten Walzenspalt 42 vorgenommene Justage der Walzenbeistellung die Walzenbeistellung in dem ersten Walzenspalt 41 beeinträchtigt. FIG. 2 shows the trigonometric conditions of the storage of the rotating body 1, 2 and 3 in a schematic representation. It can be seen that the size of the angle α deviating from 90 ° necessarily means that the adjustment of the roll provision made for the second nip 42 adversely affects the roll provision in the first nip 41.

Figur 3 zeigt ein Ablaufschema eines Verfahrens zur automatischen Walzenjustage. Im Verfahrensschritt 51 erfolgt der Start. Hierbei wird zuerst ein Waschen des den zweiten und dritten Rotationskörper 2, 3 umfassenden Farbwerks und des Druckwerkes, welches neben dem ersten Rotationskörper 1 auch einen an dem ersten Rotationskörper 1 im Druckbetrieb anliegenden Gummituchzylinder umfasst, durchgeführt. Weiterhin enthält der Verfahrensschritt 51, dass an einer Farbzonendosiereinrichtung eines Farbkastens des Farbwerks die Dosierelemente, z. B. Dosierschieber mit Zonenschrauben, derart eingestellt werden, dass alle Farbzonen gleich weit geöffnet sind und über die Druckbreite in allen Farbzonen eine gleich große Farbmenge dosiert wird. Nach dieser Farbzoneneinstellung erfolgt ein Einlauf der Druckfarbe aus dem Farbkasten in das Farbwerk, wobei bei diesem Farbeinlauf ein dem Farbwerk beigeordnetes Feuchtwerk inaktiv ist. FIG. 3 shows a flow chart of a method for automatic roll adjustment. In method step 51, the start takes place. In this case, a washing of the inking unit comprising the second and third rotary bodies 2, 3 and of the printing unit, which in addition to the first rotary body 1 also comprises a blanket cylinder resting against the first rotary body 1 in the printing operation, is carried out first. Furthermore, the method step 51 includes that at a Farbzonendosiereinrichtung a color box of the inking the metering, z. B. metering with zone screws, are set so that all ink zones are the same wide open and over the print width in all ink zones an equal amount of ink is metered. After this ink zone setting, an inlet of the ink from the ink fountain into the inking unit, wherein in this ink inlet an inking unit coordinated dampening unit is inactive.

Falls das Walzenjustageverfahren unmittelbar im Anschluss an einen durchgeführten Druckauftrag durchgeführt wird, können das Waschen, das einheitliche Einstellen der Farbzonenöffnungen und der Farbeinlauf entfallen. In diesem Fall wird lediglich das Feuchtwerk deaktiviert, so dass es kein Feuchtmittel mehr fördert.If the roll adjustment process is performed immediately after a print job is performed, the washing, the uniform adjustment of the ink zone openings, and the ink feed can be omitted. In this case, only the dampening unit is deactivated, so that it no longer promotes dampening solution.

Unabhängig davon, ob das Justageverfahren im Anschluss an den Druckauftrag durchgeführt wird oder zu einem anderen Zeitpunkt, werden die Farbauftragwalzen einschließlich des zweiten Rotationskörpers 2 und eine Feuchtauftragwalze des Feuchtwerks an den ersten Rotationskörper 1 angestellt, um die Druckfarbe aus dem Farbwerk auf den ersten Rotationskörper 1 und die darauf befindliche Offsetdruckform zu übertragen. Diese Farbübertragung erfolgt ohne eine Übertragung des Feuchtmittels auf die Offsetdruckform, so dass letztere die Druckfarbe auch in den nicht-druckenden, hydrophilen Bereichen annimmt, die sonst durch das Feuchtmittel farbfrei gehalten werden würden. Deshalb kann bei der Verfahrensvariante, bei welcher die Walzenjustage in unmittelbarem Anschluss an die Durchführung des Druckauftrags erfolgt, bei der Walzenjustage jene Offsetdruckform auf dem ersten Rotationskörper 1 beibehalten werden, welche für diesen Druckauftrag verwendet worden ist. Bei einer anderen Verfahrensvariante wird anstelle der für den Druckauftrag verwendeten Offsetdruckform eine speziell für die Walzenjustage vorgesehene Offsetdruckform auf den ersten Rotationskörper 1 aufgespannt. Diese spezielle Offsetdruckform hat ein homogenes Druckbild, so dass die Deaktivierung des Feuchtwerks nicht erforderlich ist.Regardless of whether the adjustment procedure is performed after the print job or at another time, the inking rollers will become including the second rotary body 2 and a dampening roller of the dampening unit to the first rotary body 1 employed to transfer the ink from the inking unit to the first rotary body 1 and the offset printing form located thereon. This transfer of color takes place without a transfer of the dampening solution to the offset printing form, so that the latter also assumes the printing ink in the non-printing, hydrophilic areas, which would otherwise be kept free of color by the dampening solution. Therefore, in the process variant in which the roll adjustment takes place immediately following the execution of the print job, in the roll adjustment that offset printing form on the first rotation body 1 which has been used for this print job can be retained. In another variant of the method, instead of the offset printing form used for the print job, an offset printing forme, which is specially provided for the roll adjustment, is clamped onto the first rotary body 1. This special offset printing form has a homogeneous print image, so that the deactivation of the dampening unit is not required.

Unabhängig davon, welche Offsetdruckform für die Walzenjustage verwendet wird, wird als nächstes während eines kurzen Laufes des Druckwerks, von z. B. ca. 30 Sekunden, wobei kein Bedruckstoff transportiert und bedruckt wird, die Druckfarbeverteilung in dem Farbwerk und auf dem ersten Rotationskörper 1 vergleichmäßigt.Regardless of which offset printing form is used for the roll adjustment, is next during a short run of the printing unit of z. B. about 30 seconds, wherein no substrate is transported and printed, the ink distribution in the inking unit and on the first rotary body 1 evened.

In einem Verfahrensschritt 52 wird ein statischer Kontakt- oder Pressstreifen in dem ersten Walzenspalt 41 (vgl. Figur 2) erzeugt und in einem parallel ablaufenden Verfahrensschritt 53 wird ein statischer Kontakt- oder Pressstreifen in dem zweiten Walzenspalt 42 erzeugt. Dazu wird die Rotation des ersten Rotationskörpers 1 und der an letzterem anliegenden Auftragwalzen einschließlich des zweiten Rotationskörpers 2 und die Rotation des dritten Rotationskörpers 3 in einer Drehwinkelstellung stillgesetzt, in der die Plattenvorderkante der Offsetdruckform unmittelbar nach der in Rotationsrichtung des ersten Rotationskörpers 1 gesehen letzten der Farbauftragwalzen steht. Durch den Stillstand und die statische Pressung in den Walzenspalten 41, 42 wird die Druckfarbe aus diesen Walzenspalten herausgepresst. Durch das Herauspressen der Druckfarbe entstehen auf den Rotationskörpern 1, 2, 3 im Bereich der Walzenspalte 41, 42 Streifen mit Farbarmut. Die Breiten dieser Streifen sind proportional zur im jeweiligen Walzenspalt 41, 42 herrschenden Walzenpressung und entsprechen im Wesentlichen den Pressstreifenbreiten a, b (vgl. Figur 2).In a method step 52, a static contact or pressing strip in the first nip 41 (cf. FIG. 2 ) and in a parallel process step 53, a static contact or pressure strip in the second nip 42 is generated. For this purpose, the rotation of the first rotary body 1 and the application rollers lying on the latter including the second rotary body 2 and the rotation of the third rotary body 3 is stopped in a rotational angular position in which the leading edge of the offset printing form immediately after the last in the direction of rotation of the first rotary body 1 of the inking rollers stands. Due to the standstill and the static pressure in the nips 41, 42, the ink is pressed out of these nips. By squeezing the ink arise on the bodies of revolution 1, 2, 3 in the nips 41, 42 strips with color ambition. The widths of these strips are proportional to the respective nip 41, 42 prevailing roller pressure and correspond essentially to the pressure strip widths a, b (see. FIG. 2 ).

Werden die Rotationskörper 1, 2, 3 danach weitergedreht, dann sind diese Pressstreifen als helle Streifen auf den Umfangsflächen der Rotationskörper 1, 2, 3 sichtbar. Dieses Weiterdrehen erfolgt aber nur über einen begrenzten Drehwinkel, nämlich so weit, bis der im Walzenspalt 42 auf dem zweiten Rotationskörper 2 erzeugte Pressstreifen im Laufe der Rotation des zweiten Rotationskörpers 2 ein einziges Mal auf dem ersten Rotationskörper 1 abgewälzt ist. Durch dieses Abwälzen wird auf dem ersten Rotationskörper 1 ein Abbild des im zweiten Walzenspalt 42 erzeugten Pressstreifens erzeugt.If the rotary bodies 1, 2, 3 are then further rotated, then these pressing strips are visible as light stripes on the peripheral surfaces of the rotary bodies 1, 2, 3. This further rotation takes place but only over a limited angle of rotation, namely so far until the pressure strip generated in the nip 42 on the second rotary body 2 is rolled in the course of rotation of the second rotary body 2 a single time on the first rotary body 1. As a result of this rolling, an image of the pressing strip produced in the second nip 42 is produced on the first rotary body 1.

Danach werden sämtliche Auftragwalzen einschließlich des zweiten Rotationskörpers 2 vom ersten Rotationskörper abgehoben und werden danach in einem Verfahrensschritt 54 in der Druckmaschine 4 ca. 5 bis 10 Druckbogen bedruckt. Bei dem Druckvorgang wird der auf dem ersten Rotationskörper 1 im Walzenspalt 41 erzeugte Pressstreifen und das auf den ersten Rotationskörper 1 übertragene Abbild des im zweiten Walzenspalt 42 erzeugten Pressstreifens vom ersten Rotationskörper 1 auf den daran anliegenden Gummituchzylinder übertragen und werden vom Gummituchzylinder diese beiden Abbilder auf den bogenförmigen Bedruckstoff 25 (vgl. Figur 4) übertragen.Thereafter, all applicator rollers including the second rotary body 2 are lifted from the first rotary body and are then printed in a step 54 in the printing machine 4 about 5 to 10 sheets. In the printing process, the pressing strip produced on the first rotary body 1 in the nip 41 and the transferred to the first rotary body 1 image of the press strip produced in the second nip 42 is transferred from the first rotary body 1 to the blanket cylinder adjacent thereto and are from the blanket cylinder these two images on the sheet-shaped printing material 25 (see. FIG. 4 ) transfer.

In einem darauffolgenden Verfahrensschritt 55 wird die Breite der auf die Druckbogen übertragenen Pressstreifen ermittelt. Dazu wird aus den bedruckten 5 bis 10 Druckbogen derjenige ausgewählt, auf welchem die beiden Pressstreifen am besten erkennbar sind.In a subsequent method step 55, the width of the pressing strips transmitted to the printed sheets is determined. For this purpose, the one selected from the printed 5 to 10 sheet on which the two pressing strips are best recognizable.

Zur Messung der Breiten der Abbilder der Pressstreifen auf dem Bedruckstoff 25, d. h. auf dem Druckbogen mit den deutlichsten Abbildern, wird dieser auf einen Messtisch aufgelegt, der eine optoelektronische, z. B. densitometrische, Messeinrichtung 24 aufweist.For measuring the widths of the images of the pressing strips on the printing substrate 25, d. H. on the printed sheet with the clearest images, this is placed on a measuring table, the opto-electronic, z. B. densitometric, measuring device 24 has.

Figur 4 zeigt, dass diese Messeinrichtung 24 mit einer elektronischen Steuerungseinrichtung 20 verbunden ist, welche wiederum mit den Stellmotoren 31, 32 verbunden ist (vgl. Figur 1). FIG. 4 shows that this measuring device 24 is connected to an electronic control device 20, which in turn is connected to the servomotors 31, 32 (see. FIG. 1 ).

Ausgehend von den Messsignalen der Messeinrichtung 24 berechnet die Steuerungseinrichtung 20 in einem Verfahrensschritt 56 die erforderlichen Korrekturwerte der Anstellung des zweiten an den ersten Rotationskörper und der Anstellung des zweiten an den dritten Rotationskörper. Bei der Berechnung der Zielwerte der korrigierten Anstellweiten berücksichtigt die Steuerungseinrichtung 20 den bereits erläuterten Umstand, dass die Veränderung der Anstellung des zweiten an den dritten Rotationskörper eine Veränderung der Anstellung des zweiten an den ersten Rotationskörper nach sich zieht. Bei der Korrekturberechnung der beiden Anstellungen, d. h. der Mittelpunktabstände zwischen dem ersten und zweiten Rotationskörper und zwischen dem zweiten und dritten Rotationskörper, kann die Beeinflussung der einen durch die andere Anstellung durch die Steuerungseinrichtung 20 auf Grundlage darin gespeicherter mathematischer Formeln, z. B. eines den trigonometrischen Zusammenhang beschreibenden Polynom-Modells, oder auf Grundlage einer in der Steuerungseinrichtung 20 abgelegten Wertetabelle, deren Wertepaare auf analytische Weise nach der zuvor genannten Formel bestimmt sind oder experimentell ermittelt sind, oder auf Grundlage einer dementsprechenden Funktionskurve berücksichtigt werden.Based on the measurement signals of the measuring device 24, the control device 20 calculates the required correction values of the employment of the second to the first rotation body and the employment of the second to the third rotation body in a method step 56. In the calculation of the target values of the corrected setting widths, the control device 20 takes into account the fact already explained that the change in the setting of the second to the third rotary body entails a change in the setting of the second to the first rotary body. In the correction calculation of the two jobs, d. H. the center distances between the first and second rotation body and between the second and third rotation body, the influence of one of the other employment by the control means 20 based on stored therein mathematical formulas, for. B. a trigonometric context descriptive polynomial model, or based on a stored in the control unit 20 table of values whose value pairs are determined in an analytical manner according to the aforementioned formula or are determined experimentally, or based on a corresponding function curve are taken into account.

Ausgehend von dieser Berechnung steuert die Steuerungseinrichtung 20 die Stellmotore 31, 32 derart an, dass in einem Verfahrensschritt 57 der zweite Stellmotor 32 den neu berechneten Zielwert für die Anstellung des zweiten an den ersten Rotationskörper anfährt und in einem gleichzeitig bzw. parallel erfolgenden Verfahrensschritt 58 der erste Stellmotor 31 den neu berechneten Zielwert der Anstellung des zweiten an den dritten Rotationskörper anfährt. Etwas zeitaufwändiger, aber ebenso möglich wäre eine nacheinander erfolgende Durchführung der Verfahrensschritte 57, 58.Based on this calculation, the control device 20 controls the servo motors 31, 32 in such a way that in a method step 57, the second servomotor 32 moves to the newly calculated target value for setting the second to the first rotary body and in a simultaneous or parallel process step 58 of FIG first servomotor 31 moves the newly calculated target value of the employment of the second to the third rotary body. Somewhat more time-consuming but equally possible would be the successive implementation of method steps 57, 58.

Unabhängig davon, ob die Verfahrensschritte 57, 58 gleichzeitig oder nacheinander ablaufen, ist entscheidend, dass der in dem jeweiligen Verfahrensschritt eingestellte Zielwert der Anstellung bzw. der Pressung in dem jeweiligen Walzenspalt 41, 42 endgültig ist, d. h. für das Erreichen des jeweiligen Zielwertes ist nur ein einziger Motorlauf des jeweiligen Stellmotors 31, 32 erforderlich. Es ist somit keine iterative Wiederholung der Verfahrensschritte 57, 58 erforderlich.Irrespective of whether the method steps 57, 58 take place simultaneously or successively, it is crucial that the target value of the setting or the pressing in the respective nip 41, 42 set in the respective method step is final, ie only for achieving the respective target value a single engine run of the respective servomotor 31, 32 required. Thus, no iterative repetition of the method steps 57, 58 is required.

Bei einer solchen iterativen Wiederholung würde zuerst nur einer der beiden Stellmotore 31, 32 betätigt und danach eine erneute Messung der Breite der auf dem Bedruckstoff 25 abgebildeten Pressstreifen erfolgen, um von dieser erneuten Messung ausgehend den Zielwert für den anderen Stellmotor zu bestimmen und diesen danach dementsprechend zu betätigen und würden gegebenenfalls weitere Iterationszyklen durchlaufen werden müssen, bis die Pressung bzw. Pressstreifenbreite a, b in beiden Walzenspalten 41, 42 stimmen würde bzw. innerhalb des zulässigen Toleranzbereiches ihres Soll-Wertes liegen würde.In such an iterative repetition, only one of the two servo motors 31, 32 would be actuated first, followed by a new measurement of the width of the pressure strip imaged on the printing substrate 25, in order to determine the target value for the other servo motor from this new measurement, and then accordingly If necessary, further iteration cycles would have to be run through until the pressure or pressing strip width a, b in both roll nips 41, 42 would be correct or within the permissible tolerance range of their desired value.

Im Gegensatz dazu garantiert die im Verfahrensschritt 56 erfolgte Bestimmung der beiden Zielwerte, dass nach deren Einstellung die Pressung bzw. Pressstreifenbreite a, b in beiden Walzenspalten 41, 42 bereits korrekt ist und keine erneute Messung und Nachjustage erforderlich ist. In einem Verfahrensschritt 59 ist deshalb die Walzenjustage bereits beendet.In contrast, the determination of the two target values carried out in method step 56 guarantees that after their adjustment the pressure or pressing strip width a, b in both roller nips 41, 42 is already correct and no renewed measurement and readjustment is required. In a method step 59, therefore, the roll adjustment has already ended.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
erster Rotationskörper (Formzylinder)first rotation body (forme cylinder)
22
zweiter Rotationskörper (Farbauftragwalze)second rotation body (inking roller)
33
dritter Rotationskörper (Reibwalze)third rotation body (rubbing roller)
44
Druckmaschinepress
5 - 105 - 10
./../.
1111
erste Mittelpunktzentralefirst hub center
1212
zweite Mittelpunktzentralesecond center of the center
1313
MittelpunktFocus
1414
Drehgelenkswivel
1515
Drehgelenkswivel
1616
Rollerole
1717
Steuerkurvecam
1818
Schraubengetriebescrew gear
1919
Schraubengetriebescrew gear
2020
Steuerungseinrichtungcontrol device
2121
erster Hebelfirst lever
2222
zweiter Hebelsecond lever
2323
dritter Hebelthird lever
2424
Messeinrichtungmeasuring device
2525
Bedruckstoffsubstrate
26 - 3026 - 30
./../.
3131
erster Stellmotorfirst servomotor
3232
zweiter Stellmotorsecond servomotor
33 - 4033 - 40
./../.
4141
erster Walzenspaltfirst nip
4242
zweiter Walzenspaltsecond nip
43 - 5043 - 50
./../.
51 - 5951 - 59
Verfahrensschrittstep
αα
Winkelangle
a, ba, b
PressstreifenbreitePress strip width

Claims (9)

  1. Method for the automated adjustment of a contacting pressure between rotary bodies in a printing press (4) wherein a measurement of an image of a pressure strip is taken on a printing material (25),
    characterized in
    that an image of a first pressure strip formed by a first rotary body (1) together with a second rotary body (2), and an image of a second pressure strip formed by the second rotary body (2) together with a third rotary body (3) are measured and that the contacting pressure between the rotary bodies is automatically adjusted.
  2. Method according to claim 1,
    characterized in
    that to adjust the pressure strips, a digital control device (20) actuates a first actuating motor (31) and a second actuating motor (32) as a function of measurement signals of a measuring device (24) for measuring the widths of the images of the two pressure strips.
  3. Method according to claim 2,
    characterized in
    that as a main effect or primarily, the first actuating motor (31) adjusts the second pressure strip and as an auxiliary effect or secondarily, the first actuating motor (31) adjusts the first pressure strip.
  4. Method according to claim 2 or 3,
    characterized in
    that the two actuating motors (31, 32) move the second rotary body (2) and the third rotary body (3) relative to the first rotary body (1) into a position in which a common centre connecting line (11) of the first rotary body (1) and the second rotary body (2) and a common centre connecting line (12) of the second rotary body (2) and the third rotary body form an angle (α) that is not a right angle and is greater than 0° and smaller than 180°.
  5. Method according to any one of claims 2 to 4,
    characterized in
    that a final target value of the width of the first pressure strip and a final target value of the width of the second pressure strip are adjusted on the basis of the measurement of only the image of the first pressure strip and the image of the second pressure strip and no further image of the two pressure strips.
  6. Method according to claim 5,
    characterized in
    that the final target value of the width of the first pressure strip and the final target value of the width of the second pressure strip are adjusted by a single motor operation of the first actuating motor (31) following the measurement of the images and by a single motor operation of the second adjusting motor (32) following the measurement of the images.
  7. Method according to any one of claims 1 to 6,
    characterized in
    that a forme cylinder is used as the first rotary body (1), an ink applicator roller is used as the second rotary body (2), and a distributor roller is used as the third rotary body (3).
  8. Method according to any one of claims 1 to 7,
    characterized in
    that the two images are measured on one and the same printed sheet.
  9. Method according to any one of claims 1 to 8,
    characterized in
    that the two pressure strips are static pressure strips that are created between the rotary bodies (1, 2, 3) while they are at a rotary standstill.
EP08103604.8A 2007-05-11 2008-04-18 Method for automatically adjusting a rotation body pressing in a printing machine Active EP1990197B2 (en)

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Application Number Priority Date Filing Date Title
DE102007022079A DE102007022079A1 (en) 2007-05-11 2007-05-11 Method for automated adjustment of a rotational body pressure in a printing machine

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EP1990197A3 EP1990197A3 (en) 2012-07-04
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DE102010000907B4 (en) * 2010-01-14 2015-09-10 Windmöller & Hölscher Kg Method and device for optimizing the relative position of at least two printing cylinder
IT1403496B1 (en) * 2010-12-27 2013-10-17 Uteco Converting Spa SYSTEM AND PROCEDURE FOR SETTING AND CHECKING THE PRESSURES OF PRINTING CYLINDERS IN A FLEXOGRAPHIC PRINTING MACHINE WITH CENTRAL DRUM
DE102016214713B4 (en) 2016-08-09 2020-06-04 Koenig & Bauer Ag Method for checking a strip width of a press strip
DE102017201600B4 (en) 2017-02-01 2019-04-25 Koenig & Bauer Ag Method for controlling a plurality of pressing strips with respect to their respective strip width
EP3439885B1 (en) 2016-08-09 2019-05-29 Koenig & Bauer AG Method for controlling the width of a pressure strip between two rotating bodies of a printing unit

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DE10211870A1 (en) 2001-03-29 2002-10-10 Heidelberger Druckmasch Ag Rollers mutual adjustment method for printing machine, involves measuring ink stripe on ink applicator rollers, when applicator rollers reach suitable position for measuring stripe
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DE4427967A1 (en) 1993-08-24 1995-03-02 Heidelberger Druckmasch Ag Process and devices for adjusting the cylinder pressure between inking cylinders of a printing machine
DE10145957A1 (en) 2001-03-27 2002-10-17 Windmoeller & Hoelscher Device and method for adjusting the print image in a flexographic printing machine
DE10211870A1 (en) 2001-03-29 2002-10-10 Heidelberger Druckmasch Ag Rollers mutual adjustment method for printing machine, involves measuring ink stripe on ink applicator rollers, when applicator rollers reach suitable position for measuring stripe

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US20080276816A1 (en) 2008-11-13
EP1990197A2 (en) 2008-11-12
EP1990197A3 (en) 2012-07-04
DE102007022079A1 (en) 2008-11-13

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