EP1990197B2 - 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 PDFInfo
- Publication number
- EP1990197B2 EP1990197B2 EP08103604.8A EP08103604A EP1990197B2 EP 1990197 B2 EP1990197 B2 EP 1990197B2 EP 08103604 A EP08103604 A EP 08103604A EP 1990197 B2 EP1990197 B2 EP 1990197B2
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- EP
- European Patent Office
- Prior art keywords
- rotary body
- pressure
- pressure strip
- rotary
- image
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
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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
- B41F31/30—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
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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
- B41F33/0036—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 rotary body pressure in a printing press, wherein a press strip image measurement is carried out on a printing substrate.
- each of the two rotating bodies forming a nip i. H. Rollers or cylinders, usually at least one has a rubber-elastic peripheral surface, the latter is flattened as a result of the pressing.
- This flattening is also referred to as a contact or press strip and has a width to be measured transversely to the roll rotation axis, the so-called press strip width.
- the width of the press strip can serve as a measure of the set pressure and can be measured in various ways.
- DE 10 2005 048 367 A1 describes a method for determining a nip width formed between two rotating bodies. The width of the nip is determined while a circumferential point passes through the nip.
- the press strip width generated in a nip between an inking roller and a printing form cylinder is measured using a press strip image which has been transferred to the printing sheet.
- the press strip image is measured by optoelectronic scanning.
- the measurement signals of the sensor used for optoelectronic scanning are transmitted to a control or regulating device which, based on this, generates control signals for actuating an actuator which adjusts the inking roller in such a way that the required pressure is present between it and the printing form cylinder.
- This object is achieved by a method with the features of claim 1. This process does justice to the complexity of modern roller inking units because it enables the interactions contained therein to be taken into account.
- the first actuating motor adjusts the second press strip in the main effect or primarily and the first press strip in a secondary effect or secondary.
- the second actuator can be used to set the first press strip in the main effect or primarily and the second press strip as a side effect or secondary.
- the two servomotors move the second rotation body and the third rotation body into a position relative to the first rotation body in which a common center point of the first rotation body and the second rotation body and a common center point of the second rotation body and the third rotation body Include non-right angle that is greater than 0 ° and less than 180 °.
- 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 printed sheet.
- the two press strips are static press strips which are generated between them when the rotary body is stationary.
- Figure 1 shows a first rotary body 1, a second rotary body 2 and a third rotary body 3 as components of a printing press 4.
- the first rotary body 1 is a forme cylinder for lithographic offset printing.
- the second rotary body 2 is an inking roller with a rubber-elastic peripheral surface and is in contact with the first rotary body 1 during printing operation.
- the third rotating body 3 is a friction roller, which oscillates axially and is provided with a coaxial drive gear, and bears against the second rotating body 2.
- a common, first center point 11 of the first and second rotating bodies 1, 2 and a common, second center point 12 of the second and third rotating bodies 2, 3 enclose an angle ⁇ .
- the angle ⁇ lying between the center points 11, 12 is greater than 0 ° and less than 180 °, but not a right angle, but an obtuse angle.
- a first lever 21 is pivotally mounted about the axis of rotation or the center 13 of the third rotating body 3, to which a second lever 22 is fastened via a swivel joint 14.
- a third lever 23 is fastened to the first lever 21, in which a roller 16 is rotatably mounted, which is supported on a control cam 17.
- An electrical, first servomotor 31 for pivoting the second lever 22 about the swivel joint 14 is arranged on the second lever 22.
- the first servomotor 31 engages a first arm of the second lever 22 via a screw gear 18.
- the second rotary body 2 is supported in a second arm of the second lever 22.
- An electric, second servomotor 32 is fastened to the first lever 21 and engages the third lever 23 via a further screw gear 19 in order to pivot the latter together with the roller 16 stored therein about the swivel joint 15.
- the first lever 21 is pivoted about the center 13 of the third rotating body 3.
- the actuation of the second servomotor 32 serves to press the pressure in a common, first roll nip 41 (cf. Figure 2 ) of the first and second rotating bodies 1, 2 in order to meter the amount of fluid or ink transferred from the second rotating body 2 to the first rotating body 1.
- the actuation of the first servomotor 31 serves to press the pressure in a common, second nip 42 (cf. Figure 2 ) of the second and third rotating bodies 2, 3 in order to meter the amount 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 inevitable that the actuation of the first actuator 31 not only effects the desired adjustment of a press strip width b in the second roller gap 42, but also has an undesirable side effect on the size of one Press strip width a affects in the first nip 41.
- Figure 2 shows the trigonometric conditions of the storage of the rotating body 1, 2 and 3 in a schematic representation. It can be seen from this that the size of the angle ⁇ deviating from 90 ° inevitably means that the adjustment of the roll provision made for the second roll gap 42 impairs the roll provision in the first roll gap 41.
- FIG. 3 shows a flow diagram of a method for automatic roller adjustment.
- the start takes place in method step 51.
- method step 51 contains the fact that the metering elements, eg. B. metering slide with zone screws, set so that all ink zones are open to the same extent and the same amount of ink is metered across the print width in all ink zones.
- the ink is fed from the ink fountain into the inking unit, with a dampening unit assigned to the inking unit being inactive during this ink inlet.
- the roller adjustment process is carried out immediately after a print job has been carried out, the washing, the uniform setting of the ink zone openings and the ink inlet can be omitted. In this case, only the dampening system is deactivated so that it no longer delivers dampening solution.
- the inking rollers including the second rotary body 2 and a dampening roller of the dampening unit are placed on the first rotary body 1 in order to transfer the printing ink from the inking unit onto the first rotary body 1 and transfer the offset printing form on it.
- This ink transfer takes place without transfer of the dampening solution to the offset printing form, so that the latter also accepts the printing ink in the non-printing, hydrophilic areas which would otherwise be kept free of color by the dampening solution. Therefore, in the case of the method variant in which the roller adjustment is carried out immediately after the printing job has been carried out, the offset printing form on the first rotary body 1 which was used for this printing job can be retained in the roller adjustment.
- an offset printing form specially provided for the roller adjustment is clamped onto the first rotary body 1.
- This special offset printing form has a homogeneous print image, so that deactivation of the dampening system is not necessary.
- the next step during a short run of the printing unit e.g. B. approx. 30 seconds, with no printing material being transported and printed, the printing ink distribution in the inking unit and on the first rotary body 1 is evened out.
- a static contact or press strip is placed in the first nip 41 (cf. Figure 2 ) and in a parallel process step 53 a static contact or press strip is generated in the second nip 42.
- the rotation of the first rotary body 1 and the applicator rollers adjacent to the latter, including the second rotary body 2, and the rotation of the third rotary body 3 are stopped in an angle of rotation position in which the plate leading edge of the offset printing form immediately after the last of the inking rollers seen in the direction of rotation of the first rotary body 1 stands.
- the standstill and the static pressure in the nips 41, 42 the printing ink is pressed out of these nips.
- the width of the press strips transferred to the printed sheets is determined. For this purpose, one is selected from the printed 5 to 10 printed sheets on which the two press strips are best recognizable.
- 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 (cf. Figure 1 ).
- the control device 20 calculates in a method step 56 the required correction values for the employment of the second on the first rotating body and the employment of the second on the third Rotational body.
- the control device 20 takes into account the already explained fact that the change in the placement of the second to the third rotating body entails a change in the placement of the second to the first rotating body.
- the influencing of one by the other employment can be influenced by the control device 20 on the basis of mathematical formulas stored therein, e.g. B.
- control device 20 controls the servomotors 31, 32 such that in a method step 57 the second servomotor 32 approaches the newly calculated target value for the employment of the second on the first rotating body and in a method step 58 that takes place simultaneously or in parallel first servomotor 31 starts the newly calculated target value of the employment of the second on the third rotating body.
- Executing method steps 57, 58 one after the other would be somewhat more time-consuming, but just as possible.
- the determination of the two target values made in method step 56 guarantees that, after their setting, the pressure or press strip width a, b in both roll nips 41, 42 is already correct and that no new measurement and readjustment is necessary.
- the roller adjustment is therefore already completed in a method step 59.
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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 rotary body pressure in a printing press, wherein a press strip image measurement is carried out on a printing substrate.
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 press, its abutting rollers and cylinders must be adjusted in such a way that the pressure between them in the nips has the required level. Since each of the two rotating bodies forming a nip, i. H. Rollers or cylinders, usually at least one has a rubber-elastic peripheral surface, the latter is flattened as a result of the pressing. This flattening is also referred to as a contact or press strip and has a width to be measured transversely to the roll rotation axis, the so-called press strip width. The width of the press strip can serve as a measure of the set pressure and can be measured in various ways.
In
In
In
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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.The measurement of only the press strip formed in the roller gap between the inking roller and the printing form cylinder only insufficiently takes into account the complexity of modern roller inking units, which is constructive and functional.
Deshalb liegt der Erfindung die Aufgabe zugrunde, ein der Komplexität von Walzenfarbwerk gerecht werdendes Walzenjustageverfahren anzugeben.It is therefore the object of the invention to specify a roller adjustment method which takes the complexity of roller inking units into account.
Diese Aufgabe wird durch ein Verfahren mit den Merkmalen des Anspruchs 1 gelöst. Dieses Verfahren wird der Komplexität moderner Walzenfarbwerke gerecht, weil es eine Berücksichtigung der darin gegebenen Wechselwirkungen ermöglicht.This object is achieved by a method with the features of
In den Unteransprüchen sind vorteilhafte Weiterbildungen des erfindungsgemäßen Verfahrens genannt.Advantageous developments of the method according to the invention are mentioned in the subclaims.
Bei einer Weiterbildung wird 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, the first actuating motor adjusts the second press strip in the main effect or primarily and the first press strip in a secondary effect or secondary. In addition, the second actuator can be used to set the first press strip in the main effect or primarily and the second press strip as a side effect or secondary.
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 two servomotors move the second rotation body and the third rotation body into a position relative to the first rotation body in which a common center point of the first rotation body and the second rotation body and a common center point of the second rotation body and the third rotation body Include non-right angle that is greater than 0 ° and less than 180 °.
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 printed 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 press strips are static press strips which are generated between them when the rotary body is stationary. Further developments of the invention which are advantageous in terms of construction and function result from the following description of a preferred exemplary embodiment and the associated drawing.
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
zeigendes Schema,Figur 1 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.
- Figure 1
- a forme cylinder, an inking roller and a friction roller, between which the pressure is set,
- Figure 2
- a the geometric peculiarities of the arrangement of the rotating body
Figure 1 showing scheme, - Figure 3
- a flow chart for the adjustment of the press strip between the rotating bodies and
- Figure 4
- a measuring and control device for the automated implementation of the adjustment process.
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
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.An electrical,
Die Betätigung des zweiten Stellmotors 32 dient dazu, die Pressung in einem gemeinsamen, ersten Walzenspalt 41 (vgl.
Die Betätigung des ersten Stellmotors 31 dient dazu, die Pressung in einem gemeinsamen, zweiten Walzenspalt 42 (vgl.
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 inevitable that the actuation of the
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 roller adjustment process is carried out immediately after a print job has been carried out, the washing, the uniform setting of the ink zone openings and the ink inlet can be omitted. In this case, only the dampening system is deactivated so that it no longer delivers 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 process is carried out after the print job or at another time, the inking rollers including the second
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 roller adjustment, the next step during a short run of the printing unit, e.g. B. approx. 30 seconds, with no printing material being transported and printed, the printing ink distribution in the inking unit and on the first
In einem Verfahrensschritt 52 wird ein statischer Kontakt- oder Pressstreifen in dem ersten Walzenspalt 41 (vgl.
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
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.
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
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.To measure the widths of the images of the press strips on the
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.On the basis of the measurement signals from the measuring
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
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.Regardless of whether the process steps 57, 58 run simultaneously or in succession, it is crucial that the target value of the adjustment or the pressing in the
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 the case of such an iterative repetition, only one of the two
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 to this, the determination of the two target values made in
- 11
- erster Rotationskörper (Formzylinder)first rotating body (forme cylinder)
- 22nd
- zweiter Rotationskörper (Farbauftragwalze)second rotating body (inking roller)
- 33rd
- dritter Rotationskörper (Reibwalze)third rotating body (friction roller)
- 44th
- DruckmaschinePrinting press
- 5 - 105 - 10
- ./../.
- 1111
- erste Mittelpunktzentralefirst center point
- 1212th
- zweite Mittelpunktzentralesecond center
- 1313
- MittelpunktFocus
- 1414
- DrehgelenkSwivel
- 1515
- DrehgelenkSwivel
- 1616
- Rollerole
- 1717th
- SteuerkurveControl curve
- 1818th
- SchraubengetriebeHelical gear
- 1919th
- SchraubengetriebeHelical gear
- 2020th
- SteuerungseinrichtungControl device
- 2121
- erster Hebelfirst lever
- 2222
- zweiter Hebelsecond lever
- 2323
- dritter Hebelthird lever
- 2424th
- MesseinrichtungMeasuring device
- 2525th
- 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
- VerfahrensschrittProcedural step
- αα
- Winkelangle
- a, ba, b
- PressstreifenbreitePress strip width
Claims (6)
- Method for the automated adjustment of a 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), wherein 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 wherein the pressure between the rotary bodies is automatically adjusted,
characterized
in that to adjust the pressure strips, an electronic 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, said control device (20) actuating said actuating motors (31, 32) in such a way that the second actuating motor (32) sets a newly calculated target value for the engagement between the second rotary body (2) and the first rotary body (1) and the first actuating motor (31) sets a newly calculated value for the engagement between the second rotary body (2) and the third rotary body (3),
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 only of the image of the first pressure strip and of the image of the second pressure strip and of no further image of the two pressure strips and
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 actuating motor (32) following the measurement of the images. - Method according to claim 1,
characterized
in that the first actuating motor (31) adjusts the second pressure strip primarily or as a main effect and the first pressure strip secondarily or as an auxiliary effect. - Method according to claim 1 or 2,
characterized
in that the two actuating motors (31, 32) adjust 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 of the second rotary body (2) and a common centre connecting line (12) of the second rotary body (2) and of the third rotary body form an angle (α) that is not a right angle and is greater than 0° and smaller than 180°. - Method according to any one of claims 1 to 3,
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). - Method according to any one of claims 1 to 4,
characterized
in that the two images are measured on one and the same printed sheet. - Method according to any one of claims 1 to 5,
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.
Applications Claiming Priority (1)
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 |
Publications (4)
Publication Number | Publication Date |
---|---|
EP1990197A2 EP1990197A2 (en) | 2008-11-12 |
EP1990197A3 EP1990197A3 (en) | 2012-07-04 |
EP1990197B1 EP1990197B1 (en) | 2016-11-02 |
EP1990197B2 true EP1990197B2 (en) | 2020-04-29 |
Family
ID=39712377
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08103604.8A Active EP1990197B2 (en) | 2007-05-11 | 2008-04-18 | Method for automatically adjusting a rotation body pressing in a printing machine |
Country Status (3)
Country | Link |
---|---|
US (1) | US20080276816A1 (en) |
EP (1) | EP1990197B2 (en) |
DE (1) | DE102007022079A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
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 |
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 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10145957A1 (en) † | 2001-03-27 | 2002-10-17 | Windmoeller & Hoelscher | Device and method for adjusting the print image in a flexographic printing machine |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4211379C2 (en) * | 1992-04-04 | 1999-01-07 | Roland Man Druckmasch | Anilox offset printing unit with a short inking unit |
DE4232163C3 (en) * | 1992-09-25 | 2001-09-06 | Koenig & Bauer Ag | Device for maintaining an adjusted pressure of an inking roller on a form cylinder of a rotary printing press |
DE4427967B4 (en) | 1993-08-24 | 2004-09-30 | Heidelberger Druckmaschinen Ag | Method for presetting the pressure between ink-guiding cylinders of a printing press |
US5448949A (en) * | 1993-08-24 | 1995-09-12 | Heidelberger Druckmaschinen Ag | Method and device for adjusting a contact pressure between ink-carrying cylinders of a printing machine |
JP4438155B2 (en) * | 2000-01-31 | 2010-03-24 | 凸版印刷株式会社 | Roller adjustment method and roller adjustment device for printing machine, and offset printing machine |
DE10211870B4 (en) | 2001-03-29 | 2010-07-29 | Heidelberger Druckmaschinen Ag | Method for adjusting two rollers of a printing unit which can be applied to one another |
DE10302747A1 (en) * | 2003-01-24 | 2004-08-12 | Windmöller & Hölscher | Method for correcting variations in the amount of ink transferred to the printed image during the printing process |
US7225735B2 (en) * | 2004-05-03 | 2007-06-05 | Heidelberger Druckmaschinen Ag | Method for roller adjustment in a printing press |
DE102005048367B4 (en) * | 2005-10-10 | 2010-08-05 | Wifag Maschinenfabrik Ag | Nip width measurement |
EP1976699B1 (en) * | 2006-01-25 | 2013-08-07 | Advanced Vision Technology (AVT) Ltd. | System and method for setting up a printing press |
-
2007
- 2007-05-11 DE DE102007022079A patent/DE102007022079A1/en not_active Withdrawn
-
2008
- 2008-04-18 EP EP08103604.8A patent/EP1990197B2/en active Active
- 2008-05-12 US US12/119,040 patent/US20080276816A1/en not_active Abandoned
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10145957A1 (en) † | 2001-03-27 | 2002-10-17 | Windmoeller & Hoelscher | Device and method for adjusting the print image in a flexographic printing machine |
Also Published As
Publication number | Publication date |
---|---|
EP1990197B1 (en) | 2016-11-02 |
US20080276816A1 (en) | 2008-11-13 |
EP1990197A3 (en) | 2012-07-04 |
EP1990197A2 (en) | 2008-11-12 |
DE102007022079A1 (en) | 2008-11-13 |
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