EP2106910B1 - Method for positioning a pressure plate on a plate cylinder of a printer - Google Patents

Method for positioning a pressure plate on a plate cylinder of a printer Download PDF

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Publication number
EP2106910B1
EP2106910B1 EP09003505A EP09003505A EP2106910B1 EP 2106910 B1 EP2106910 B1 EP 2106910B1 EP 09003505 A EP09003505 A EP 09003505A EP 09003505 A EP09003505 A EP 09003505A EP 2106910 B1 EP2106910 B1 EP 2106910B1
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EP
European Patent Office
Prior art keywords
data
plate cylinder
plate
printing
reading
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EP09003505A
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German (de)
French (fr)
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EP2106910A1 (en
Inventor
Rolf-Peter Lehner
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/005—Attaching and registering printing formes to supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/007—Control means comprising cameras, vision or image processing systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/0092—Perforating means specially adapted for printing machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/02—Perforating by punching, e.g. with relatively-reciprocating punch and bed
    • B26F1/12—Perforating by punching, e.g. with relatively-reciprocating punch and bed to notch margins of work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
    • B41C1/1075—Mechanical aspects of on-press plate preparation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2227/00—Mounting or handling printing plates; Forming printing surfaces in situ
    • B41P2227/30—Detecting the correct position of printing plates on the cylinder

Definitions

  • the invention relates to a method for positioning a printing plate on a plate cylinder of a printing press, as for example in the EP-A-1593505 is described.
  • a printing set of printing plates or printing plates for the various printing inks is usually produced from a colored original.
  • the individual printing plates must be adjusted to each other on the corresponding plate cylinders so that the prints produced in the different colors exactly match, otherwise there will be blurred images and / or incorrect colors.
  • the coincidence of the positioning must be in the range of 1/100 mm, so that the positioning must be carried out with high precision.
  • the printed image is applied to the printing plate by means of a laser or photochemically, wherein additionally two position markings are applied outside the printed image, which contain additional information.
  • two pass punches are attached to one side edge, by means of which the pressure plate then later for positioning appropriate dowel pins applied to the plate cylinder and then tightened.
  • the pressure plate is applied to edge stops. Since the edges of a printing plate are usually not processed so precisely that the desired accuracy of the assignment between printed image and pass punching is achieved, this assignment is detected in a reading station by means of a camera system, and the information read is passed as a record to a computer device.
  • the required correction settings for the plate cylinder of the printing press are calculated on which the printing plate is to be mounted. With the aid of these correction settings, the various adjustment mechanisms for the plate cylinder can then be set.
  • An object of the present invention is therefore to provide a method for the exact positioning of a printing plate on a plate cylinder, in which even with tolerance deviations and zero-point deviations on the plate cylinder even a quick and easy positioning is possible.
  • the inventive method has the advantage that in addition to the detection of tolerances and inaccuracies of the printing plate and position correction data of the plate cylinder itself are taken into account, which are either read into the computer device (27) or already stored there, from these data in the case of existing punched punches Setting data for the plate cylinder or, in the case of not yet existing punch punches Setting data for a punching tool for attaching the punched punches are calculated. Since these adjustment data take into account all tolerances and errors of printing plate and plate cylinder, further settings and adjustments can be omitted after the application of the pressure plate to the dowel pins of the plate cylinder and clamping the pressure plate. This results in substantial paper savings and labor savings for otherwise required adjustments and adjustments.
  • pass punchings are applied after applying the printed image and the at least one reference position on the pressure plate, said pass punching when detecting the at least one reference position in one with the Reading device provided reading station are applied as a facility serving dowel pins of the reading station.
  • the pressure plate was applied at the edge of positioning means when applying the printed image and when attaching the punch punches.
  • the plate cylinder is automatically positioned manually in accordance with the calculated position correction data motor or even in a simpler version.
  • the printing plate when the print image is applied and when the at least one reference position is detected by means of the reading device, the printing plate is applied on the edge to positioning means. Then, in a combined reading and punching station provided with the reading device, the punching punches are attached, which then already contain all corrections with respect to tolerances of the printing plate and of the plate cylinder.
  • a motor relative positioning of the pressure plate is advantageously carried out to a punching tool, that is, either the pressure plate is positioned relative to the punching tool or vice versa.
  • a camera system is expediently used to detect the at least one reference position.
  • This is preferably designed as a mark and / or coding, for example in the form of two reference marks.
  • These fiducial marks advantageously contain an encoding, which includes one or more of the following data: disk characteristics, image position, disk outside edges, intended ink, the intended plate cylinder, the intended ducking machine, and / or job data. If data on the intended plate cylinder are already included in this coding, they no longer need to be read from a memory device of the intended plate cylinder, but can be detected directly when detecting the position marks.
  • printing plate 10 is applied in a first workstation 11 with its outer edges to a conditioning device 12 and thereby positioned, in principle, an optical positioning is possible.
  • a print image 13 and two fiducial marks 14, 15 are applied by laser processing or by a chemical process, the two Reference marks 14, 15 are in fixed spatial association with the printed image 13 and are mounted outside thereof. If they are realized very small, so they can in principle also be within the printed image, if they do not disturb this. This is described in detail in the prior art mentioned above.
  • the reference marks 14, 15, which may also vary in number, are each provided with a coding, whereby also only one of the reference marks 14, 15 can be provided with this coding.
  • the data code of this coding contains various information which ensure, for example, correct assignment of the printing plate 10 to a plate cylinder 16 of a printing press 17. Furthermore, this data code may also contain information about dimensions, orientation, format and / or color of the printing plate and position correction data of the plate cylinder 16, for which the printing plate 10 is provided. Job data can also be included.
  • the fiducial marks 14, 15 may also contain no coding.
  • two punch punches 19, 20 are attached by means of a punching device 21 to an outer edge of the pressure plate 10 in a second workstation 18.
  • the printing plate 10 is again applied to a conditioning device 22 for positioning.
  • the pressure plate 10 Since the outer edges of the pressure plate 10 usually have tolerances in the range of 1/10 mm, the required exact assignment of punch punches 19, 20 to the reference marks 14, 15 and thus to the printed image 13 is not guaranteed in the desired accuracy, which is in the range of 1 / 100 mm must lie. Also the reference edges of the equipment 12 or 22 generally do not tolerate negligible. In order to detect deviations in this regard, the pressure plate 10 is now applied in a third workstation 23 to there existing dowel pins 24, 25 by means of the punch punches 19, 20. The dowel pins 24, 25 are designed as sensors and generate an enable signal when they fully and accurately engage in the punch punches 19, 20.
  • a trained as a camera system reading device 26 is triggered to detect the position of the reference marks 14, 15 in relation to the dowel pins 24, 25 or punch punches 19, 20.
  • the reading device 26 stands in a fixed spatial relationship to the dowel pins 24, 25 simultaneously the coded data of the fiducial marks 14, 15 are read out.
  • the read information is then forwarded by this trained as a reading station third workstation 23 to a computer device 27.
  • Position correction data about this plate cylinder 16 are likewise fed to the computer device 27 by a control device 28 of the plate cylinder 16 provided for the pressure plate 10.
  • Such plate cylinder 16 have a zero-point setting, wherein clamping means for the pressure plate 10 on the plate cylinder 16, required dowel pins on the plate cylinder 16 and bearing positions of this plate cylinder 16 also have tolerances that must be compensated for the exact positioning of the pressure plate 10. These tolerances are reported to the computing device 27 as position correction data of the plate cylinder.
  • These position correction data are known and based on earlier exact measurements. They may also be included as codes in the fiducials 14, 15. In this case, they are the computer device 27 already and must can not be read out of the control device 28 or the plate cylinder 16. They may also already be stored in a memory of the computer device 27.
  • adjustment data for the plate cylinder 16 are now calculated, in which all these detected tolerances and errors are taken into account.
  • the computer device 27 now controls the control device 28 for the plate cylinder 16 in such a way that its position or the position of the dowel pins arranged there is corrected to compensate the detected tolerances and errors.
  • the control device 28 actuates motorized adjustment means, which are not shown for the sake of simplicity.
  • a printing machine 17 may have a plurality of printing units 29-31, of which only three are shown for the sake of simplicity.
  • Each printing unit 29-31 contains a plate cylinder 16, 32, 33.
  • the number of printing units 29-31 depends, for example, on the desired color quality, ie on the number of different colors that are to be applied.
  • the described method and the corresponding described device can also be used or operated simultaneously for a plurality of printing units and / or printing presses. Of course, this also applies to the second embodiment described below.
  • a second workstation 40 is formed as a combined reading and punching station.
  • the reference marks 14, 15 and their positions are first detected by means of the reading device 26, ie before the punch punches 19, 20 are applied.
  • the acquired data are fed to the computer device 27 as reference data, whereby any coding data of the reference marks 14 present here are also present 15 are read out and supplied to the computer device 27.
  • the computer device 27 are now, as in the first embodiment, either position correction data of the plate cylinder 16 supplied by the controller 28 or previously by reading the coding data of the reference marks 14, 15 or this position correction data are already stored in the computer device 27.
  • the computer device 27 controls a position control device 41 for controlling and adjusting the position of a contact device 42 for the pressure plate 10.
  • a position control device 41 for controlling and adjusting the position of a contact device 42 for the pressure plate 10.
  • the mounted in the set position punch punches 19, 20 thus already take into account the exact position of the reference marks 14, 15 and the printed image 13 and the position correction data of the plate cylinder 16.
  • the position correction data of all plate cylinders 16, 32, 33 or printing units 29-31 of a printing press 17 can also already be stored in the computer device 27 or in a control device 28 or in a plurality of control devices of the printing press 17.
  • the position control device 41 can in principle also set or change the position of the punching device 21.
  • punch punches 19, 20 and a punching device 21 are mentioned, so only conventional names are chosen without being limited to pure Stamping operations is meant.
  • the "punch punches” can also be produced for example by laser processing, milling or other appropriate operations.

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  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Abstract

The method involves applying a printing image (13) and reference position in the form of a marking or coding in or near the printing image on a printing plate (10). The reference position is connected with the printing image. One of the reference positions is detected by a reading device (26) depending on an attachment position of the printing plate at an attachment device as reference data.

Description

Die Erfindung betrifft ein Verfahren zur Positionierung einer Druckplatte auf einem Plattenzylinder einer Druckmaschine, wie es beispielsweise in der EP-A-1593505 beschrieben ist.The invention relates to a method for positioning a printing plate on a plate cylinder of a printing press, as for example in the EP-A-1593505 is described.

Zur Herstellung von Farbdrucken wird üblicherweise von einem farbigen Original ein Drucksatz von Druckformen beziehungsweise Druckplatten für die verschiedenen Druckfarben hergestellt. Bevor mit dem eigentlichen Druckvorgang begonnen werden kann, müssen beim Einrichten der Druckmaschine die einzelnen Druckplatten so zueinander auf den entsprechenden Plattenzylindern justiert werden, dass die dadurch erzeugten Drucke in den unterschiedlichen Farben exakt übereinanderpassen, andernfalls ergeben sich unscharfe Bilder und/oder nichtkorrekte Farben. Die Übereinstimmung der Positionierungen muss hierzu im Bereich von 1/100 mm liegen, so dass die Positionierung mit hoher Präzision erfolgen muss.To produce color prints, a printing set of printing plates or printing plates for the various printing inks is usually produced from a colored original. Before you can start with the actual printing process, when setting up the printing press, the individual printing plates must be adjusted to each other on the corresponding plate cylinders so that the prints produced in the different colors exactly match, otherwise there will be blurred images and / or incorrect colors. The coincidence of the positioning must be in the range of 1/100 mm, so that the positioning must be carried out with high precision.

Beim bekannten Verfahren wird zunächst, wie üblich, das Druckbild mittels eines Lasers oder fotochemisch auf die Druckplatte aufgebracht, wobei zusätzlich zwei Positionsmarkierungen außerhalb des Druckbilds angebracht werden, die zusätzliche Informationen enthalten. Anschließend werden an einem Seitenrand zwei Passstanzungen angebracht, mittels derer die Druckplatte dann später zur Positionierung an entsprechende Passstifte am Plattenzylinder angelegt und dann festgespannt wird. Beim Aufbringen des Druckbilds und beim Anbringen der Passstanzungen liegt die Druckplatte an Randanschlägen an. Da die Ränder einer Druckplatte üblicherweise nicht so exakt bearbeitet sind, dass die gewünschte Genauigkeit der Zuordnung zwischen Druckbild und Passstanzungen erreicht wird, wird diese Zuordnung in einer Lesestation mittels eines Kamerasystems erfasst, und die gelesenen Informationen werden als Datensatz an eine Computereinrichtung weitergegeben. Dort werden dann die erforderlichen Korrektureinstellungen für den Plattenzylinder der Druckmaschine berechnet, auf dem die Druckplatte montiert werden soll. Mit Hilfe dieser Korrektureinstellungen können dann die verschiedenen Einstellmechanismen für den Plattenzylinder eingestellt werden.In the known method, first of all, as usual, the printed image is applied to the printing plate by means of a laser or photochemically, wherein additionally two position markings are applied outside the printed image, which contain additional information. Subsequently, two pass punches are attached to one side edge, by means of which the pressure plate then later for positioning appropriate dowel pins applied to the plate cylinder and then tightened. When applying the printed image and when attaching the punch punches, the pressure plate is applied to edge stops. Since the edges of a printing plate are usually not processed so precisely that the desired accuracy of the assignment between printed image and pass punching is achieved, this assignment is detected in a reading station by means of a camera system, and the information read is passed as a record to a computer device. There, the required correction settings for the plate cylinder of the printing press are calculated on which the printing plate is to be mounted. With the aid of these correction settings, the various adjustment mechanisms for the plate cylinder can then be set.

Für eine exakte Positionierung einer Druckplatte auf einem Plattenzylinder müssen noch Toleranzen und Fehler des Plattenzylinders und dessen Passstifte berücksichtigt werden. Die Klemmeinrichtungen für die Platte auf dem Plattenzylinder sind unterschiedlich, ebenso wie der eingestellte Null-Punkt für die verschiedenen Einstellungen des Plattenzylinders. Eine genauere Einstellung wäre sehr aufwendig bei schlechter Konstanz. Dies hat zur Folge, dass trotz Kenntnis von Toleranzen der Druckplatte und der entsprechenden berechneten Einstellungen für den Plattenzylinder zusätzliche Einstellvorgänge am Plattenzylinder vorgenommen werden müssen, die einen hohen Papierverbrauch zur Folge haben.For an exact positioning of a printing plate on a plate cylinder still tolerances and errors of the plate cylinder and its dowel pins must be considered. The clamping devices for the plate on the plate cylinder are different, as well as the set zero point for the different settings of the plate cylinder. A more accurate setting would be very expensive with poor consistency. This has the consequence that despite knowledge of tolerances of the printing plate and the corresponding calculated settings for the plate cylinder additional adjustments must be made on the plate cylinder, which have a high paper consumption result.

Eine Aufgabe der vorliegenden Erfindung besteht somit darin, ein Verfahren zur exakten Positionierung einer Druckplatte auf einem Plattenzylinder zu schaffen, bei dem auch bei Toleranzabweichungen und Null-Punkt-Abweichungen am Plattenzylinder selbst eine schnelle und einfache Positionierung möglich ist.An object of the present invention is therefore to provide a method for the exact positioning of a printing plate on a plate cylinder, in which even with tolerance deviations and zero-point deviations on the plate cylinder even a quick and easy positioning is possible.

Diese Aufgabe wird erfindungsgemäß durch ein Verfahren mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved by a method having the features of claim 1.

Das erfindungsgemäße Verfahren hat den Vorteil, dass neben der Erfassung von Toleranzen und Ungenauigkeiten der Druckplatte auch Positionskorrekturdaten des Plattenzylinders selbst berücksichtigt werden, die entweder in die Computereinrichtung (27) eingelesen oder dort bereits gespeichert sind, wobei aus diesen Daten im Falle von bereits vorhandenen Passstanzungen Einstelldaten für den Plattenzylinder oder im Falle von noch nicht vorhandenen Passstanzungen Einstelldaten für ein Stanzwerkzeug zur Anbringung der Passstanzungen berechnet werden. Da diese Einstelldaten alle Toleranzen und Fehler von Druckplatte und Plattenzylinder berücksichtigen, können nach dem Anlegen der Druckplatte an die Passstifte des Plattenzylinders und Anklemmen der Druckplatte weitere Einstellungen und Anpassungen entfallen. Dies führt zu einer wesentlichen Papiereinsparung und Arbeitszeiteinsparung für ansonsten erforderliche Einstellvorgänge und Anpassungsvorgänge.The inventive method has the advantage that in addition to the detection of tolerances and inaccuracies of the printing plate and position correction data of the plate cylinder itself are taken into account, which are either read into the computer device (27) or already stored there, from these data in the case of existing punched punches Setting data for the plate cylinder or, in the case of not yet existing punch punches Setting data for a punching tool for attaching the punched punches are calculated. Since these adjustment data take into account all tolerances and errors of printing plate and plate cylinder, further settings and adjustments can be omitted after the application of the pressure plate to the dowel pins of the plate cylinder and clamping the pressure plate. This results in substantial paper savings and labor savings for otherwise required adjustments and adjustments.

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Anspruch 1 angegebenen Verfahrens möglich.The measures listed in the dependent claims advantageous refinements and improvements of claim 1 method are possible.

In einer ersten vorteilhaften Ausgestaltung des erfindungsgemäßen Verfahrens werden zum Anlegen an Passstifte des Plattenzylinders dienende Passstanzungen nach dem Aufbringen des Druckbilds und der wenigstens einen Bezugsposition an der Druckplatte angebracht, wobei diese Passstanzungen beim Erfassen der wenigstens einen Bezugsposition in einer mit der Leseeinrichtung versehenen Lesestation an als Anlageeinrichtung dienende Passstifte der Lesestation angelegt sind. Hierdurch kann mittels der Leseeinrichtung eine exakte Zuordnung der wenigstens einen Bezugsposition zu den Passstanzungen erfasst werden. Zuvor wurde die Druckplatte beim Aufbringen des Druckbilds und beim Anbringen der Passstanzungen randseitig an Positioniermittel angelegt.In a first advantageous embodiment of the method according to the invention serving for fitting to dowel pins of the plate cylinder pass punchings are applied after applying the printed image and the at least one reference position on the pressure plate, said pass punching when detecting the at least one reference position in one with the Reading device provided reading station are applied as a facility serving dowel pins of the reading station. In this way, by means of the reading device, an exact assignment of the at least one reference position to the punch punches can be detected. Previously, the pressure plate was applied at the edge of positioning means when applying the printed image and when attaching the punch punches.

Bei dieser Ausgestaltung des Verfahrens wird der Plattenzylinder gemäß den berechneten Positionskorrekturdaten automatisch motorisch oder auch in einer einfacheren Version manuell positioniert.In this embodiment of the method, the plate cylinder is automatically positioned manually in accordance with the calculated position correction data motor or even in a simpler version.

In einer zweiten vorteilhaften Ausgestaltung des Verfahrens wird die Druckplatte beim Aufbringen des Druckbilds und beim Erfassen der wenigstens einen Bezugsposition mittels der Leseeinrichtung randseitig an Positioniermittel angelegt. Dann werden in einer mit der Leseeinrichtung versehenen kombinierten Lese- und Stanzstation die Passstanzungen angebracht, die dann bereits alle Korrekturen bezüglich Toleranzen der Druckplatte und des Plattenzylinders beinhalten.In a second advantageous embodiment of the method, when the print image is applied and when the at least one reference position is detected by means of the reading device, the printing plate is applied on the edge to positioning means. Then, in a combined reading and punching station provided with the reading device, the punching punches are attached, which then already contain all corrections with respect to tolerances of the printing plate and of the plate cylinder.

Zum Anbringen der Passstanzungen in Abhängigkeit der Bezugsdaten und der Positionskorrekturdaten wird in vorteilhafter Weise eine motorische Relativpositionierung der Druckplatte zu einem Stanzwerkzeug durchgeführt, das heißt, entweder die Druckplatte wird relativ zum Stanzwerkzeug oder umgekehrt motorisch positioniert.For attaching the punch punches in dependence on the reference data and the position correction data, a motor relative positioning of the pressure plate is advantageously carried out to a punching tool, that is, either the pressure plate is positioned relative to the punching tool or vice versa.

Als Leseeinrichtung wird zweckmäßigerweise ein Kamerasystem verwendet, um die wenigstens eine Bezugsposition zu erfassen. Diese ist bevorzugt als Marke und/oder Codierung, beispielsweise in Form von zwei Bezugsmarken, ausgeführt. Diese Bezugsmarken enthalten in vorteilhafter Weise eine Codierung, die eine oder mehrere der folgenden Daten enthält: Daten über Platteneigenschaften, die Bildposition, die Plattenaußenkanten, die vorgesehene Druckfarbe, den vorgesehenen Plattenzylinder, die vorgesehene Duckmaschine und/oder Job-Daten. Falls Daten über den vorgesehenen Plattenzylinder bereits in dieser Codierung enthalten sind, so brauchen sie nicht mehr aus einer Speichereinrichtung des vorgesehenen Plattenzylinders ausgelesen zu werden, sondern können direkt beim Erfassen der Positionsmarken miterfasst werden.As a reading device, a camera system is expediently used to detect the at least one reference position. This is preferably designed as a mark and / or coding, for example in the form of two reference marks. These fiducial marks advantageously contain an encoding, which includes one or more of the following data: disk characteristics, image position, disk outside edges, intended ink, the intended plate cylinder, the intended ducking machine, and / or job data. If data on the intended plate cylinder are already included in this coding, they no longer need to be read from a memory device of the intended plate cylinder, but can be detected directly when detecting the position marks.

Zwei Ausführungsvarianten des erfindungsgemäßen Verfahrens sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen:

Figur 1
die erste Ausführungsvariante des erfindungsgemäßen Verfahrens, bei der der jeweilige Plattenzylinder in Abhängigkeit der berechneten Einstelldaten auto- matisch positioniert wird, als erstes Ausführungs- beispiel der Erfindung, und
Figur 2
eine zweite Ausführungsvariante des erfindungsgemä- ßen Verfahrens, bei der die Passstanzungen in Ab- hängigkeit der Bezugsdaten und der Positionskorrek- turdaten angebracht werden, als zweites Ausfüh- rungsbeispiel der Erfindung.
Two variants of the method according to the invention are shown in the drawing and explained in more detail in the following description. Show it:
FIG. 1
the first embodiment of the method according to the invention, in which the respective plate cylinder is automatically positioned as a function of the calculated setting data, as a first embodiment of the invention, and
FIG. 2
A second embodiment variant of the method according to the invention, in which the punch punches are attached as a function of the reference data and the position correction data, as a second embodiment of the invention.

Die in Figur 1 zur Erläuterung der ersten Ausführungsvariante des erfindungsgemäßen Verfahrens dargestellte Druckplatte 10 wird in einer ersten Arbeitsstation 11 mit ihren Außenkanten an eine Anlagevorrichtung 12 angelegt und dadurch positioniert, wobei prinzipiell auch eine optische Positionierung möglich ist. Nach der Positionierung werden ein Druckbild 13 und zwei Bezugsmarken 14, 15 durch Laserbearbeitung oder durch ein chemisches Verfahren aufgebracht, wobei die beiden Bezugsmarken 14, 15 in fester räumlicher Zuordnung zum Druckbild 13 stehen und außerhalb desselben angebracht sind. Falls sie sehr klein realisiert werden, so können sie prinzipiell auch innerhalb des Druckbilds stehen, wenn sie dieses nicht stören. Dies ist im eingangs angegebenen Stand der Technik näher beschrieben.In the FIG. 1 to illustrate the first embodiment of the method illustrated printing plate 10 is applied in a first workstation 11 with its outer edges to a conditioning device 12 and thereby positioned, in principle, an optical positioning is possible. After positioning, a print image 13 and two fiducial marks 14, 15 are applied by laser processing or by a chemical process, the two Reference marks 14, 15 are in fixed spatial association with the printed image 13 and are mounted outside thereof. If they are realized very small, so they can in principle also be within the printed image, if they do not disturb this. This is described in detail in the prior art mentioned above.

Die Bezugsmarken 14, 15, die bezüglich ihrer Anzahl auch variieren können, sind jeweils mit einer Codierung versehen, wobei auch nur eine der Bezugsmarken 14, 15 mit dieser Codierung versehen sein kann. Der Datencode dieser Codierung enthält verschiedene Informationen, die beispielsweise ein korrektes Zuordnen der Druckplatte 10 zu einem Plattenzylinder 16 einer Druckmaschine 17 gewährleisten. Weiterhin kann dieser Datencode auch Informationen über Abmessungen, Orientierung, Format und/oder Farbe der Druckplatte und Positionskorrekturdaten des Plattenzylinders 16 enthalten, für die die Druckplatte 10 vorgesehen ist. Auch Job-Daten können enthalten sein. Bei einer sehr einfachen Ausführung können die Bezugsmarken 14, 15 auch keine Codierung enthalten.The reference marks 14, 15, which may also vary in number, are each provided with a coding, whereby also only one of the reference marks 14, 15 can be provided with this coding. The data code of this coding contains various information which ensure, for example, correct assignment of the printing plate 10 to a plate cylinder 16 of a printing press 17. Furthermore, this data code may also contain information about dimensions, orientation, format and / or color of the printing plate and position correction data of the plate cylinder 16, for which the printing plate 10 is provided. Job data can also be included. In a very simple embodiment, the fiducial marks 14, 15 may also contain no coding.

Nach dem Aufbringen des Druckbilds 13 und der Bezugsmarken 14, 15 werden in einer zweiten Arbeitsstation 18 zwei Passstanzungen 19, 20 mit Hilfe einer Stanzvorrichtung 21 an einer Außenkante der Druckplatte 10 angebracht. Hierzu wird die Druckplatte 10 zur Positionierung wiederum an eine Anlagevorrichtung 22 angelegt.After the application of the printed image 13 and the reference marks 14, 15, two punch punches 19, 20 are attached by means of a punching device 21 to an outer edge of the pressure plate 10 in a second workstation 18. For this purpose, the printing plate 10 is again applied to a conditioning device 22 for positioning.

Da die Außenkanten der Druckplatte 10 üblicherweise Toleranzen im Bereich von 1/10 mm aufweisen, ist die erforderliche exakte Zuordnung von Passstanzungen 19, 20 zu den Bezugsmarken 14, 15 und damit zum Druckbild 13 nicht in der gewünschten Genauigkeit gewährleistet, die im Bereich von 1/100 mm liegen muss. Auch die Bezugskanten der Anlagevorrichtungen 12 beziehungsweise 22 tolerieren im Allgemeinen nicht unwesentlich. Um diesbezügliche Abweichungen zu erkennen, wird nun die Druckplatte 10 in einer dritten Arbeitsstation 23 an dort vorhandene Passstifte 24, 25 mittels der Passstanzungen 19, 20 angelegt. Die Passstifte 24, 25 sind dabei als Sensoren ausgebildet und erzeugen ein Freigabesignal, wenn sie vollständig und exakt in die Passstanzungen 19, 20 eingreifen. Hierdurch wird eine als Kamerasystem ausgebildete Leseeinrichtung 26 ausgelöst zur Erfassung der Position der Bezugsmarken 14, 15 in Relation zu den Passstiften 24, 25 beziehungsweise Passstanzungen 19, 20. Die Leseeinrichtung 26 steht dabei in einem festen räumlichen Bezug zu den Passstiften 24, 25. Gleichzeitig werden die codierten Daten der Bezugsmarken 14, 15 ausgelesen. Die Leseinformationen werden dann von dieser als Lesestation ausgebildeten dritten Arbeitsstation 23 an eine Computereinrichtung 27 weitergeleitet.Since the outer edges of the pressure plate 10 usually have tolerances in the range of 1/10 mm, the required exact assignment of punch punches 19, 20 to the reference marks 14, 15 and thus to the printed image 13 is not guaranteed in the desired accuracy, which is in the range of 1 / 100 mm must lie. Also the reference edges of the equipment 12 or 22 generally do not tolerate negligible. In order to detect deviations in this regard, the pressure plate 10 is now applied in a third workstation 23 to there existing dowel pins 24, 25 by means of the punch punches 19, 20. The dowel pins 24, 25 are designed as sensors and generate an enable signal when they fully and accurately engage in the punch punches 19, 20. In this way, a trained as a camera system reading device 26 is triggered to detect the position of the reference marks 14, 15 in relation to the dowel pins 24, 25 or punch punches 19, 20. The reading device 26 stands in a fixed spatial relationship to the dowel pins 24, 25 simultaneously the coded data of the fiducial marks 14, 15 are read out. The read information is then forwarded by this trained as a reading station third workstation 23 to a computer device 27.

Von einer Steuereinrichtung 28 des für die Druckplatte 10 vorgesehenen Plattenzylinders 16 werden Positionskorrekturdaten über diesen Plattenzylinder 16 ebenfalls der Computereinrichtung 27 zugeführt. Derartige Plattenzylinder 16 besitzen eine Null-Punkt-Einstellung, wobei Klemmeinrichtungen für die Druckplatte 10 am Plattenzylinder 16, erforderliche Passstifte am Plattenzylinder 16 und Lagerpositionen dieses Plattenzylinders 16 ebenfalls Toleranzen aufweisen, die zur exakten Positionierung der Druckplatte 10 ausgeglichen werden müssen. Diese Toleranzen werden der Computereinrichtung 27 als Positionskorrekturdaten des Plattenzylinders gemeldet. Diese Positionskorrekturdaten sind bekannt und beruhen auf früheren exakten Messungen. Sie können auch als Codierungen in den Bezugsmarken 14, 15 enthalten sein. In diesem Falle liegen sie der Computereinrichtung 27 bereits vor und müssen nicht aus der Steuereinrichtung 28 oder dem Plattenzylinder 16 ausgelesen werden. Sie können auch bereits in einem Speicher der Computereinrichtung 27 gespeichert sein.Position correction data about this plate cylinder 16 are likewise fed to the computer device 27 by a control device 28 of the plate cylinder 16 provided for the pressure plate 10. Such plate cylinder 16 have a zero-point setting, wherein clamping means for the pressure plate 10 on the plate cylinder 16, required dowel pins on the plate cylinder 16 and bearing positions of this plate cylinder 16 also have tolerances that must be compensated for the exact positioning of the pressure plate 10. These tolerances are reported to the computing device 27 as position correction data of the plate cylinder. These position correction data are known and based on earlier exact measurements. They may also be included as codes in the fiducials 14, 15. In this case, they are the computer device 27 already and must can not be read out of the control device 28 or the plate cylinder 16. They may also already be stored in a memory of the computer device 27.

Aus den von der Leseeinrichtung 26 erfassten Bezugsdaten für die Bezugsmarken 14, 15 beziehungsweise für das Druckbild 13 und die Positionskorrekturdaten für den Plattenzylinder 16 werden nun Einstelldaten für den Plattenzylinder 16 berechnet, in denen alle diese erfassten Toleranzen und Fehler berücksichtigt sind. Mit Hilfe dieser Einstelldaten steuert die Computereinrichtung 27 nun die Steuereinrichtung 28 für den Plattenzylinder 16 derart, dass dessen Position beziehungsweise die Position der dort angeordneten Passstifte zum Ausgleich der erfassten Toleranzen und Fehler korrigiert wird. Die Steuereinrichtung 28 betätigt dabei motorische Einstellmittel, die zur Vereinfachung nicht dargestellt sind.From the reference data for the reference marks 14, 15 or for the print image 13 and the position correction data for the plate cylinder 16 detected by the reading device 26, adjustment data for the plate cylinder 16 are now calculated, in which all these detected tolerances and errors are taken into account. With the aid of these setting data, the computer device 27 now controls the control device 28 for the plate cylinder 16 in such a way that its position or the position of the dowel pins arranged there is corrected to compensate the detected tolerances and errors. The control device 28 actuates motorized adjustment means, which are not shown for the sake of simplicity.

In einer einfacheren Version kann anstelle der vollautomatischen Einstellung des Plattenzylinders 16 durch die Computereinrichtung 27 auch eine manuelle Einstellung anhand der berechneten Einstelldaten erfolgen. Diese manuelle Einstellung kann wiederum mit Hilfe der vorhandenen motorischen Einstellmittel durchgeführt werden.In a simpler version, instead of the fully automatic adjustment of the plate cylinder 16 by the computer device 27, a manual adjustment based on the calculated setting data done. This manual adjustment can in turn be carried out with the aid of the existing motor adjustment means.

Werden bei der Berechnung der Einstelldaten oder schon bei der Erfassung der Bezugsdaten Toleranzen festgestellt, die außerhalb eines zulässigen Toleranzbereichs liegen, so wird die Druckplatte 10 sofort ausgesondert, da eine entsprechende Korrektur des Plattenzylinders 16 dann nicht mehr möglich wäre.If tolerances are found in the calculation of the setting data or already during the detection of the reference data, which lie outside a permissible tolerance range, the pressure plate 10 is immediately discarded, since a corresponding correction of the plate cylinder 16 would then no longer be possible.

Eine Druckmaschine 17 kann eine Vielzahl von Druckwerken 29-31 aufweisen, von denen zur Vereinfachung nur drei dargestellt sind. Jedes Druckwerk 29-31 enthält einen Plattenzylinder 16, 32, 33. Die Zahl der Druckwerke 29-31 hängt beispielsweise von der gewünschten Farbqualität, also von der Anzahl der verschiedenen Farben ab, die aufzubringen sind. Das beschriebene Verfahren und die entsprechende beschriebene Einrichtung kann auch gleichzeitig für mehrere Druckwerke und/oder Druckmaschinen eingesetzt bzw. betrieben werden. Dies gilt selbstverständlich auch für das im folgenden beschriebene zweite Ausführungsbeispiel.A printing machine 17 may have a plurality of printing units 29-31, of which only three are shown for the sake of simplicity. Each printing unit 29-31 contains a plate cylinder 16, 32, 33. The number of printing units 29-31 depends, for example, on the desired color quality, ie on the number of different colors that are to be applied. The described method and the corresponding described device can also be used or operated simultaneously for a plurality of printing units and / or printing presses. Of course, this also applies to the second embodiment described below.

Bei der in Figur 2 zur Erläuterung der zweiten Ausführungsvariante des erfindungsgemäßen Verfahrens dargestellten Anordnung sind gleiche oder gleich wirkende Bauteile und Baugruppen mit denselben Bezugszeichen versehen und nicht nochmals beschrieben.At the in FIG. 2 to explain the second embodiment of the method according to the invention shown arrangement are the same or equivalent components and assemblies provided with the same reference numerals and not described again.

Während die erste Arbeitsstation 11 zur Aufbringung des Druckbilds 13 und der Bezugsmarken 14, 15 dem ersten Ausführungsbeispiel entspricht, ist bei dieser Verfahrensvariante eine zweite Arbeitsstation 40 als kombinierte Lese- und Stanzstation ausgebildet. Bei dieser Ausführung des Verfahrens werden zunächst die Bezugsmarken 14, 15 und deren Positionen mittels der Leseeinrichtung 26 erfasst, also vor Anbringung der Passstanzungen 19, 20. Die erfassten Daten werden als Bezugsdaten der Computereinrichtung 27 zugeleitet, wobei auch hier eventuell vorhandene Codierdaten der Bezugsmarken 14, 15 mit ausgelesen und der Computereinrichtung 27 zugeführt werden. Der Computereinrichtung 27 werden nun, wie beim ersten Ausführungsbeispiel, entweder Positionskorrekturdaten des Plattenzylinders 16 seitens der Steuereinrichtung 28 oder bereits zuvor durch Auslesen der Codierdaten der Bezugsmarken 14, 15 zugeführt oder diese Positionskorrekturdaten sind bereits in der Computereinrichtung 27 gespeichert. Aus den Positionskorrekturdaten und den Bezugsdaten für die Bezugsmarken 14, 15 beziehungsweise das Druckbild 13 werden in der Computereinrichtung 27 Positionsdaten für die Anbringung der Passstanzungen 19, 20 berechnet. Mit Hilfe dieser Positionsdaten steuert die Computereinrichtung 27 eine Positionssteuereinrichtung 41 zur Steuerung und Einstellung der Position einer Anlagevorrichtung 42 für die Druckplatte 10. Hierdurch kann die Relativposition der Druckplatte 10 zur Stanzvorrichtung 21 eingestellt werden. Die in der eingestellten Position angebrachten Passstanzungen 19, 20 berücksichtigen somit bereits die exakte Position der Bezugsmarken 14, 15 beziehungsweise des Druckbilds 13 und die Positionskorrekturdaten des Plattenzylinders 16. Wird daher die mit diesen Passstanzungen 19, 20 versehene Druckplatte 10 an die Passstifte des Plattenzylinders 16 angelegt, so sind alle Toleranzen bezüglich des Druckbilds 13 und des Plattenzylinders 16 bereits kompensiert, und Nacheinstellungen können entfallen. Dies trifft selbstverständlich auch für das erste Ausführungsbeispiel zu, bei dem anstelle der Passstanzungen 19, 20 die Position des Plattenzylinders 16 und dessen Passstifte computerberechnet korrigiert wird.While the first work station 11 for applying the printed image 13 and the reference marks 14, 15 corresponds to the first embodiment, in this process variant, a second workstation 40 is formed as a combined reading and punching station. In this embodiment of the method, the reference marks 14, 15 and their positions are first detected by means of the reading device 26, ie before the punch punches 19, 20 are applied. The acquired data are fed to the computer device 27 as reference data, whereby any coding data of the reference marks 14 present here are also present 15 are read out and supplied to the computer device 27. The computer device 27 are now, as in the first embodiment, either position correction data of the plate cylinder 16 supplied by the controller 28 or previously by reading the coding data of the reference marks 14, 15 or this position correction data are already stored in the computer device 27. From the position correction data and the reference data for the fiducial marks 14, 15 and the print image 13, respectively calculated in the computer device 27 position data for the attachment of the punch punches 19, 20. With the aid of these position data, the computer device 27 controls a position control device 41 for controlling and adjusting the position of a contact device 42 for the pressure plate 10. As a result, the relative position of the pressure plate 10 to the punching device 21 can be adjusted. The mounted in the set position punch punches 19, 20 thus already take into account the exact position of the reference marks 14, 15 and the printed image 13 and the position correction data of the plate cylinder 16. Therefore, the pressure plate 10 provided with these punch punches 19, 20 to the dowel pins of the plate cylinder sixteenth applied, all tolerances with respect to the printed image 13 and the plate cylinder 16 are already compensated, and Nacheinstellungen can be omitted. This of course also applies to the first embodiment, in which instead of the punch punches 19, 20, the position of the plate cylinder 16 and its dowel pins is corrected computer calculated.

Die Positionskorrekturdaten von allen Plattenzylindern 16, 32, 33 beziehungsweise Druckwerken 29-31 einer Druckmaschine 17 können auch bereits in der Computereinrichtung 27 oder in einer Steuereinrichtung 28 oder in mehreren Steuereinrichtungen der Druckmaschine 17 gespeichert sein.The position correction data of all plate cylinders 16, 32, 33 or printing units 29-31 of a printing press 17 can also already be stored in the computer device 27 or in a control device 28 or in a plurality of control devices of the printing press 17.

Anstelle der Positionierung der Anlagevorrichtung 42 und damit der Druckplatte 10 kann die Positionssteuereinrichtung 41 prinzipiell auch die Position der Stanzvorrichtung 21 einstellen beziehungsweise verändern.Instead of positioning the abutment device 42 and thus the pressure plate 10, the position control device 41 can in principle also set or change the position of the punching device 21.

Wenn in der Beschreibung von Passstanzungen 19, 20 und einer Stanzvorrichtung 21 die Rede ist, so werden lediglich übliche Bezeichnungen gewählt, ohne dass eine Beschränkung auf reine Stanzvorgänge gemeint ist. Die "Passstanzungen" können beispielsweise auch durch Laserbearbeitung, Fräsen oder sonstige entsprechende Arbeitsvorgänge hergestellt werden.If in the description of punch punches 19, 20 and a punching device 21 is mentioned, so only conventional names are chosen without being limited to pure Stamping operations is meant. The "punch punches" can also be produced for example by laser processing, milling or other appropriate operations.

Claims (11)

  1. Method for positioning a printing plate (10) on a plate cylinder (16) of a printing machine (17), comprising the following steps:
    a) the application of an image (13) and of at least one reference position (14, 15) related to the image (13) in the form of a mark and/or coding in or next to the image (13) to the printing plate (10);
    b) the scanning of the at least one reference position (14, 15) by means of a reading device (26) in dependence on a lay position of the printing plate at a lay device (24, 25; 42) as reference data;
    c) the forwarding of the scanned reference data to a computer device (27), characterised by the following features:
    d) the reading of position correction data of the plate cylinder (16) into the computer device (27) or the reading-out of position correction data of the plate cylinder (16) which are stored in the computer device (27);
    e) the calculation of the position of notchings (19, 20) designed for laying against register pins of the plate cylinder (16) in dependence on the reference data and the position correction data and the corresponding placement of the notchings (19, 20) or the calculation of adjustment data for the plate cylinder (16) in dependence on the reference data and the position correction data.
  2. Method according to claim 1, characterised in that the notchings (19, 20) designed for laying against register pins of the plate cylinder are applied after the application of the image (13) and the at least one reference position (14, 15) to the printing plate (16), and in that the notchings (19, 20) of the printing plate (10) are laid against register pins of the reading station (23) which serve as a lay device (24, 25) while the at least one reference position is scanned in a reading station (23) provided with the reading device (26).
  3. Method according to claim 2, characterised in that the edges of the printing plate (10) are laid against positioning means (12, 22) while the image (13) and the notchings (19, 20) are applied.
  4. Method according to any of the preceding claims, characterised in that the plate cylinder (16) is positioned either automatically by means of a motor or manually in accordance with the calculated position correction data.
  5. Method according to claim 1, characterised in that the edges of the printing plate (10) are laid against positioning means (12, 42) by means by means of the reading device (26) while the image (13) is applied and the at least one reference position (14, 15) is scanned.
  6. Method according to claim 5, characterised in that the notchings (19, 20) are produced in a combined reading and punching station (40) of the reading device (26).
  7. Method according to claim 5 or 6, characterised in that a motor-driven relative positioning of the printing plate (10) with respect to a punching tool (21) is carried out in dependence on the reference data and the position correction data in order to produce the notchings (19, 20).
  8. Method according to any of the preceding claims, characterised in that a camera system is used as a reading device (26).
  9. Method according to any of the preceding claims, characterised in that the coding of the at least one reference position contains one or more of the following data: data on plate characteristics, the image position, the external contour of the plate, the proposed printing ink, the proposed plate cylinder, the proposed printing machine and/or job data.
  10. Method according to claim 9, characterised in that the data on the proposed plate cylinder and/or the proposed printing machine are read from the coding as position correction data for the respective plate cylinder (16).
  11. Method according to claim 9, characterised in that the data on the proposed plate cylinder are read from the printing machine (17) or stored in the computer device (27).
EP09003505A 2008-03-31 2009-03-11 Method for positioning a pressure plate on a plate cylinder of a printer Active EP2106910B1 (en)

Applications Claiming Priority (1)

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DE102008016731A DE102008016731B4 (en) 2008-03-31 2008-03-31 Method for positioning a printing plate on a plate cylinder of a printing machine

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012214824A1 (en) 2012-08-21 2014-02-27 Ball Europe Gmbh Method and device for aligning printing plates on printing cylinders

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3611689A1 (en) * 2018-08-15 2020-02-19 SCHÖCK BAUTEILE GmbH Method and measurement device for the analysis of the dimensional accuracy of an element relating to the mounting environment

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Publication number Priority date Publication date Assignee Title
DE4207546A1 (en) * 1992-03-10 1993-09-23 Roland Man Druckmasch Alignment of printing plates on plate cylinder of esp. sheet feed offset printing press - using printing plates with register stampings applied at edge and printing plate before fixing on plate cylinder is brought into contact with corresp. register pin
DE19919263B4 (en) * 1999-04-09 2005-09-29 Ronald Metje Processing device for trimming printing plates for printing machines
DE10238120A1 (en) * 2001-09-28 2003-04-17 Heidelberger Druckmasch Ag Device for positioning a print plate comprises register bolts with detectors that match corresponding stamped register cut-outs in the print plate leading edge and an additional plate position detector between the bolts
ATE486721T1 (en) 2004-05-05 2010-11-15 Rolf-Peter Lehner METHOD FOR QUICKLY CHECKING THE POSITION OF A PRINTED IMAGE ON A PRINTING FORM
DE102004036876A1 (en) * 2004-07-29 2006-03-23 Koenig & Bauer Ag Method for the pre-setting register locating unit of plate cylinder for sheet-fed offset printing press involves positioning of register mark through register mark measuring system with stationary sensors

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012214824A1 (en) 2012-08-21 2014-02-27 Ball Europe Gmbh Method and device for aligning printing plates on printing cylinders
WO2014029527A1 (en) 2012-08-21 2014-02-27 Ball Europe Gmbh Method and device for aligning printing plates on printing cylinders

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DE102008016731A1 (en) 2009-10-15
ATE513684T1 (en) 2011-07-15
DE102008016731B4 (en) 2013-09-05

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