EP1221367B2 - Method for changing a printing cylinder sleeve and printing machine for carrying out the method - Google Patents

Method for changing a printing cylinder sleeve and printing machine for carrying out the method Download PDF

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Publication number
EP1221367B2
EP1221367B2 EP01100301A EP01100301A EP1221367B2 EP 1221367 B2 EP1221367 B2 EP 1221367B2 EP 01100301 A EP01100301 A EP 01100301A EP 01100301 A EP01100301 A EP 01100301A EP 1221367 B2 EP1221367 B2 EP 1221367B2
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EP
European Patent Office
Prior art keywords
cylinder
printing
central
sleeve
central cylinder
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.)
Expired - Lifetime
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EP01100301A
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German (de)
French (fr)
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EP1221367B1 (en
EP1221367A1 (en
Inventor
Manfred Terstegen
Wilfried Dr. Kolbe
Klaus Schirrich
Bodo Steinmeier
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Fischer and Krecke GmbH and Co KG
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Fischer and Krecke GmbH and Co KG
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Application filed by Fischer and Krecke GmbH and Co KG filed Critical Fischer and Krecke GmbH and Co KG
Priority to DE50109336T priority Critical patent/DE50109336D1/en
Priority to EP01100301A priority patent/EP1221367B2/en
Priority to ES01100301T priority patent/ES2258989T5/en
Priority to JP2001396628A priority patent/JP2002234136A/en
Priority to US10/038,779 priority patent/US6644188B2/en
Publication of EP1221367A1 publication Critical patent/EP1221367A1/en
Publication of EP1221367B1 publication Critical patent/EP1221367B1/en
Publication of EP1221367B2 publication Critical patent/EP1221367B2/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F5/00—Rotary letterpress machines
    • B41F5/24—Rotary letterpress machines for flexographic printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0018—Protection means against injury to the operator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2217/00—Printing machines of special types or for particular purposes
    • B41P2217/10—Printing machines of special types or for particular purposes characterised by their constructional features
    • B41P2217/13—Machines with double or multiple printing units for "flying" printing plates exchange

Definitions

  • the invention relates to a method and a printing machine for changing a printing cylinder sleeve in a printing machine with a central cylinder and engageable with the Monyzlinder inking units, each having a Druckplattenzlinder with a pushed onto a mandrel printing cylinder sleeve, wherein the printing plate cylinder turned off from the central cylinder and the pressure cylinder sleeve after Releasing a bearing is withdrawn axially from the mandrel.
  • EP-A-0 812 681 a flexographic printing machine is described with several arranged on the circumference of a central cylinder inking units, wherein the printing plate cylinder each inking unit has a replaceable held on a frame-fixed dome pressure cylinder sleeve. If the printing cylinder sleeve must be replaced, for example, to convert the machine to another print job, the printing plate cylinder is moved away from the circumference of the central cylinder, and on the operating side of the printing press a bearing of the printing plate cylinder is released and removed, for example, moved to the side, so that axially withdraw the printing cylinder sleeve from the dome. The mandrel is held in the machine frame on the opposite side of the printing press and remains in the machine frame during the entire change process.
  • the printing cylinder sleeve may be a so-called sleeve on which the printing plates or clichés are clamped, or to an intermediate cylinder, which in turn carries on its outer periphery a sleeve with the cliches thereon clamped.
  • the object of the invention is to provide a method with which, at least in some cases, the downtime of the printing press can be shortened during conversion to another print job and a safe replacement of the printing cylinder sleeve is made possible while the printing press.
  • This method always allows a reduction in downtime, when not used in the first print job all the inking units of the printing press. In this case, it is possible to replace the printing cylinder sleeves of the unused inking units before the current print job is completed. Thus, the printing press can be completely or partially retooled before the completion of the current print job for the next to be executed print job, so that the machine downtime significantly reduced.
  • the three inking units which are not needed in the first print job can already be set up for the next print job, so that between the end of the first print job and the beginning of the second print job, no time is needed to replace the printing cylinder sleeve.
  • the printing plate cylinder In most conventional printing presses, the printing plate cylinder, even when it is turned off from the central cylinder, only a relatively small distance from the peripheral surface of the central cylinder. Since the central cylinder rotates at high speed, there could be damage or injury when changing the printing cylinder sleeve with the printing press running when the printing cylinder sleeve or used for their handling aggregates or the hand of the operator who performs the pressure cylinder change, abuts the rotating central cylinder. For this reason, the invention provides that the pressure plate cylinder is turned off so far from the central cylinder, that between the pressure cylinder sleeve and the circumference of the central cylinder remains a sufficient safety distance. If no additional safety measures are taken, this distance should be at least 120 mm. This requires a design of the printing press that allows the printing plate cylinder to move far enough away from the central cylinder.
  • the invention furthermore relates to a printing machine, according to claim 3, in which a contact protection is provided on the circumference of the central cylinder at the end located on the operating side.
  • the contact guard is movably mounted, and it is brought into the operative position only when the printing plate cylinder has moved away from the central cylinder.
  • the contact protection can be designed so that it protrudes in its operative position into the space between the impression cylinder and the central cylinder and thus completely or partially shields the peripheral surface of the rotating central cylinder.
  • printing machine has a machine frame with side parts 10, 12, between which a rotatably driven central cylinder 14 is mounted.
  • a plurality of inking units are arranged, of which only two inking units 16, 18 are shown in the drawing.
  • Each inking unit has an engageable against the central cylinder 14 printing plate cylinder 20 and an engageable against the printing plate cylinder anilox roller 22.
  • the printing material (not shown) is looped over the circumference of the central cylinder 14 so as to pass through the nips which the central cylinder 14 forms with each of the printing plate cylinders 20.
  • the detent roller 22 is inked by means of a chamber doctor blade, not shown, with ink and gives the ink to the stereotypes, which are clamped on the printing plate cylinder 20, so that the running through the nip printing material is printed with the ink.
  • the press If the press is to be converted for another print job, so must be replaced at least the clichés bearing printing plate cylinder 20 of the used inking units. In this case, the diameter of the printing plate cylinder can change, if you want to work in the new job with a different print length. Often, it is also necessary to replace the anilox roller 22 to adjust the ink transfer properties of this anilox roller to the particular job and the ink used.
  • the printing plate cylinder 20 is at least in two parts and comprises a rotatably mounted in the machine frame mandrel 24 and a releasably mounted on the mandrel pressure cylinder sleeve 26 which carries on its outer periphery of the cliché. Accordingly, the anilox roller 22 has a mandrel 28 and a replaceable sleeve 30.
  • the mandrel 24 of the printing plate cylinder 20 of each inking unit is mounted in bearing blocks 30. 32, which are displaceably guided on the side parts 10, 12, so that the printing plate cylinder 20 can be made to the central cylinder 14 and turned off by this again.
  • the guided on this side part 10 bearing block 30 forms a folding bearing, which is detachable from the mandrel 24.
  • the bearing block 32 forms a tilt-stable bearing, with which the mandrel 24 is held like a boom, when the folding bearing has been solved on the operating side and removed.
  • the mandrel 28 of the anilox roller 22 is mounted in a corresponding manner in bearing blocks 36, 38.
  • a contact protection 40 is arranged for each inking unit, which lies in the respective window 34.
  • This contact protection 40 has an end plate 42 which covers the part of the end face of the central cylinder 14 which lies behind the window 34.
  • a right-angled protruding from the end plate 42 shield plate 44 ( FIG. 2 ) is curved so that it follows the peripheral surface of the central cylinder 14 with a small radial distance.
  • a positioning cylinder 46 for example a pneumatic cylinder, is held by means of a base plate 48 on the side part 10 and makes it possible to adjust the contact protection 40 in the direction parallel to the axis of the central cylinder 14. In the in FIG. 2 As shown, the contact guard 40 is retracted into the window 34 so that the shield plate 44 is out of the nip formed between the impression cylinder sleeve 26 and the central cylinder 14.
  • the respective inking unit 16 can be used for printing.
  • the hinged bearings of the bearing blocks 30 and 36 are released, and the bearing blocks 30, 36 are moved to the side.
  • the printing plate cylinder 20 is then cantilever-like with its mandrel 24, cantilevered, held solely by the bearing block 32, and the end face of the pressure cylinder sleeve 26 is freely accessible on the operating side in the window 34th
  • the contact protection 40 in the in FIG. 4 shown extended position in which the end plate 42 lies close to the end face of the central cylinder 14 and the shield plate 44 shields the adjacent to the window 34 peripheral portion of the central cylinder 14.
  • the central cylinder 14 rotates at high speed, the user can safely grasp the space between the center cylinder and the plate cylinder to axially withdraw the cylinder sleeve 26 from the mandrel 24, as in FIG FIG. 4 is shown.
  • a new pressure cylinder sleeve 26 can be pushed back onto the mandrel 24.
  • Austreersystem as shown in the European patent application 99 119 764 is described.
  • the bearing block 30 When the new pressure cylinder sleeve 26 is tightened on the mandrel 24, for example by means of a hydraulic system, the bearing block 30 is returned to the position in which it supports the free end of the mandrel 24 and the folding bearing is closed. The bearing block 30 is then in a position in which it also allows the replacement of the sleeve of the anilox roller 22, if necessary.
  • the conversion of the inking unit 16 to the new print job can thus accomplish before the end of the previous print job, so that can be started without loss of time with the new print job.
  • the contact protection 40 is again in the inoperative position according to Figures 1 and 2 withdrawn, and the printing plate cylinder 20 and the anilox roller 20 are again turned against each other and against the central cylinder 14.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Description

Die Erfindung betrifft ein Verfahren und eine Druckmaschine zum Wechseln einer Druckzylinderhülse in einer Druckmaschine mit einem Zentralzylinder und mehreren an den Zentralyzlinder anstellbaren Farbwerken, die jeweils einen Druckplattenzlinder mit einer auf einen Dorn aufgeschobenen Druckzylinderhülse aufweisen, bei dem der Druckplattenzylinder vom Zentralzylinder abgestellt und die Druckzylinderhülse nach Lösen eines Lagers axial vom Dorn abgezogen wird.The invention relates to a method and a printing machine for changing a printing cylinder sleeve in a printing machine with a central cylinder and engageable with the Zentralyzlinder inking units, each having a Druckplattenzlinder with a pushed onto a mandrel printing cylinder sleeve, wherein the printing plate cylinder turned off from the central cylinder and the pressure cylinder sleeve after Releasing a bearing is withdrawn axially from the mandrel.

In EP-A-0 812 681 wird eine Flexodruckmaschine mit mehreren am Umfang eines Zentralzylinders angeordneten Farbwerken beschrieben, bei der der Druckplattenzylinder jedes Farbwerks eine auswechselbar auf einem gestellfesten Dom gehaltene Druckzylinderhülse aufweist. Wenn die Druckzylinderhülse ausgewechselt werden muß, beispielsweise um die Maschine auf einen anderen Druckauftrag umzurüsten, so wird der Druckplattenzylinder vom Umfang des Zentralzylinders abgerückt, und auf der Bedienungsseite der Druckmaschine wird ein Lager des Druckplattenzylinders gelöst und entfernt, beispielsweise zur Seite gefahren, so daß sich die Druckzylinderhülse axial von dem Dom abziehen läßt. Der Dorn ist auf der gegenüberliegenden Seite der Druckmaschine auslegeartig im Maschinengestell gehalten und verbleibt während des gesamten Wechselvorgangs im Maschinengestell.In EP-A-0 812 681 a flexographic printing machine is described with several arranged on the circumference of a central cylinder inking units, wherein the printing plate cylinder each inking unit has a replaceable held on a frame-fixed dome pressure cylinder sleeve. If the printing cylinder sleeve must be replaced, for example, to convert the machine to another print job, the printing plate cylinder is moved away from the circumference of the central cylinder, and on the operating side of the printing press a bearing of the printing plate cylinder is released and removed, for example, moved to the side, so that axially withdraw the printing cylinder sleeve from the dome. The mandrel is held in the machine frame on the opposite side of the printing press and remains in the machine frame during the entire change process.

Bei der Druckzylinderhülse kann es sich um ein sogenanntes Sleeve handeln, auf das die Druckplatten oder Klischees aufgespannt sind, oder um einen Zwischenzylinder, der seinerseits auf seinem äußeren Umfang ein Sleeve mit den darauf aufgespannten Klischees trägt.In the printing cylinder sleeve may be a so-called sleeve on which the printing plates or clichés are clamped, or to an intermediate cylinder, which in turn carries on its outer periphery a sleeve with the cliches thereon clamped.

Aus US 5 692 442 ist ein Verfahren bekannt, bei dem der Wechsel der Druckzylinder einer Flexodruckmaschine bei laufender Maschine erfoldgt.Out US 5,692,442 a method is known in which the change of the printing cylinder of a flexographic printing machine while the machine is running.

In der Zeitschrift Flexo+Tief-Druck, 3-2000, Mai 2000. Seiten 148 und 149, wird eine Druckmaschine der Anmelderin beschrieben, bei der Sleeves und Zwischenzylinder unterschiedlicher Durchmesser auf den Dom aufspannbar sind. Der Zwischenzylinder ist mit Hilfe eines Hydrauliksystems auf dem Dorn festspannbar. Die Sleeves werden je nach Durchmesser entweder auf den Zwischenzylinder oder unmittelbar auf den Dom aufgeschoben. Zum leichteren Wechsel des Sleeves ist ein Druckluftsystem vorgesehen, mit dem Druckluft radial aus dem Dom und gegebenenfalls aus dem Zwischenzylinder ausgeblasen werden kann, so daß sich das Sleeve auf einem Luftpolster mit geringem Reibungswiderstand von Hand vom Dorn beziehungsweise vom Zwischenzylinder abziehen läßt.In the journal Flexo + Tief-Druck, 3-2000, May 2000 pages 148 and 149, a printing press of the applicant is described in the sleeves and intermediate cylinders of different diameters are aufspannbar on the cathedral. The intermediate cylinder can be clamped on the mandrel by means of a hydraulic system. Depending on the diameter, the sleeves are either pushed onto the intermediate cylinder or directly onto the mandrel. For easier replacement of the sleeve, a compressed air system is provided, with the compressed air can be blown radially out of the dome and possibly from the intermediate cylinder, so that the sleeve on an air cushion with low frictional resistance can be deducted by hand from the mandrel or the intermediate cylinder.

Durch Verwendung einer Druckzylinderhülse aus Kohlefaser-Verbundmaterial wird eine Gewichtsersparnis erreicht, die die Handhabung der Druckzylinderhülse erleichtert und zugleich die Gewichtsbelastung des auslegerartig im Maschinengestell gehaltenen Dorns reduziert.By using a pressure cylinder sleeve of carbon fiber composite material, a weight saving is achieved, which facilitates the handling of the printing cylinder sleeve and at the same time reduces the weight load of the boom-like held in the machine frame mandrel.

In der europäischen Patentanmeldung 99 119 764 der Anmelderin wird eine Vorrichtung beschrieben, die das manuelle Auswechseln der Druckzylinderhülse dadurch erleichtert, daß auf der der Bedienungsseite entgegengesetzten Seite ein Ausstoßer vorgesehen ist, mit dem die auszuwechselnde Druckzylinderhülse ein Stück weit in Richtung auf die Bedienungsseite ausgestoßen werden kann, so daß sie sich bequemer erfassen und ganz abziehen läßt. Die neu aufgeschobene Druckzylinderhülse wird dann von einer an dem Ausstoßer angebrachten Rückziehkralle erfaßt und in die endgültige Position eingezogen.In the European patent application 99 119 764 An apparatus is described by the applicant, which facilitates the manual replacement of the printing cylinder sleeve in that on the side opposite the operating side, an ejector is provided, with which the pressure cylinder sleeve to be replaced can be ejected a little way towards the operating side, so that they are more comfortable capture and subtract completely. The newly deferred printing cylinder sleeve is then detected by a mounted on the ejector pull-back claw and retracted to the final position.

Trotz dieser Arbeitserleichterungen ist der Wechsel der Druckzylinderhülsen bei der Umrüstung der Druckmaschine auf einen anderen Druckauftrag nach wie vor ein relativ zeitraubender Vorgang, der längere Stillstandszeiten der Druckmaschine verursacht.Despite this work, the change of the printing cylinder sleeves during the conversion of the printing press to another print job is still a relatively time-consuming process that causes longer downtime of the printing press.

Aufgabe der Erfindung ist es, ein Verfahren anzugeben, mit dem sich zumindest in einigen Fällen die Stillstandszeit der Druckmaschine bei der Umrüstung auf einen anderen Druckauftrag verkürzen läßt und ein gefahrloses Auswechseln der Druckzylinderhülse bei laufender Druckmaschine ermöglicht wird.The object of the invention is to provide a method with which, at least in some cases, the downtime of the printing press can be shortened during conversion to another print job and a safe replacement of the printing cylinder sleeve is made possible while the printing press.

Diese Aufgabe wird dadurch ein Verfahren gemäß Anspruch 1 gelöst.This object is achieved by a method according to claim 1.

Dieses Verfahren ermöglicht immer dann eine Verkürzung der Stillstandszeiten, wenn bei dem zuerst ausgeführten Druckauftrag nicht sämtliche Farbwerke der Druckmaschine benutzt werden. In diesem Fall ist es möglich, die Druckzylinderhülsen der nicht benutzten Farbwerke auszuwechseln, bevor der laufende Druckauftrag beendet ist. So läßt sich die Druckmaschine schon vor Beendigung des laufenden Druckauftrags ganz oder teilweise für den als nächstes auszuführenden Druckauftrag umrüsten, so daß die Maschinenstillstandszeiten beträchtlich verkürzt werden. Wenn beispielsweise bei einer Druckmaschine mit sechs Farbwerken nacheinander zwei Druckaufträge durchgeführt werden sollen, bei denen jeweils nur mit drei Farben gearbeitet wird, so können die drei Farbwerke, die bei dem ersten Druckauftrag nicht benötigt werden, schon für den nächsten Druckauftrag eingerichtet werden, so daß zwischen dem Ende des ersten Druckauftrags und dem Beginn des zweiten Druckauftrags keine Zeit mehr für das Auswechseln der Druckzylinderhülse benötigt wird.This method always allows a reduction in downtime, when not used in the first print job all the inking units of the printing press. In this case, it is possible to replace the printing cylinder sleeves of the unused inking units before the current print job is completed. Thus, the printing press can be completely or partially retooled before the completion of the current print job for the next to be executed print job, so that the machine downtime significantly reduced. If, for example, two printing jobs are to be successively carried out in a printing machine with six inking units, each working with only three colors, then the three inking units which are not needed in the first print job can already be set up for the next print job, so that between the end of the first print job and the beginning of the second print job, no time is needed to replace the printing cylinder sleeve.

Bei den meisten herkömmlichen Druckmaschinen weist der Druckplattenzylinder auch dann, wenn er vom Zentralzylinder abgestellt ist, nur einen relativ geringen Abstand zur Umfangsfläche des Zentralzylinders auf. Da der Zentralzylinder mit hoher Geschwindigkeit rotiert, könnte es bei einem Wechsel der Druckzylinderhülse bei laufender Druckmaschine zu Beschädigungen oder Verletzungen kommen, wenn die Druckzylinderhülse oder die zu ihrer Handhabung benutzten Aggregate oder die Hand der Bedienungsperson, die den Druckzylinderwechsel ausführt, am rotierenden Zentralzylinder anstößt. Aus diesem Grund ist erfindungsgemäß vorgesehen, daß der Druckplattenzylinder so weit vom Zentralzylinder abgestellt wird, daß zwischen der Druckzylinderhülse und dem Umfang des Zentralzylinders ein ausreichender Sicherheitsabstand verbleibt. Wenn keine zusätzlichen Sicherheitsmaßnahmen getroffen werden, sollte dieser Abstand mindestens 120 mm betragen. Dies setzt eine Konstruktion der Druckmaschine voraus, die es gestattet, den Druckplattenzylinder weit genug vom Zentralzylinder abzurücken.In most conventional printing presses, the printing plate cylinder, even when it is turned off from the central cylinder, only a relatively small distance from the peripheral surface of the central cylinder. Since the central cylinder rotates at high speed, there could be damage or injury when changing the printing cylinder sleeve with the printing press running when the printing cylinder sleeve or used for their handling aggregates or the hand of the operator who performs the pressure cylinder change, abuts the rotating central cylinder. For this reason, the invention provides that the pressure plate cylinder is turned off so far from the central cylinder, that between the pressure cylinder sleeve and the circumference of the central cylinder remains a sufficient safety distance. If no additional safety measures are taken, this distance should be at least 120 mm. This requires a design of the printing press that allows the printing plate cylinder to move far enough away from the central cylinder.

Gegenstand der Erfindung ist weiterhin eine Druckmaschine, nach Anspruch 3 bei der am Umfang des Zentralzylinders an dem auf der Bedienungsseite gelegenen Ende ein Berührungsschutz vorgesehen ist. Hierdurch wird ein gefahrloses Auswechseln der Druckzylinderhülse bei laufender Druckmaschine auch dann ermöglicht, wenn sich aufgrund der konstruktiven Gegebenheiten kein Sicherheitsabstand von 120 mm oder mehr zwischen dem Druckplattenzylinder und dem Zentralzylinder einhalten läßt.The invention furthermore relates to a printing machine, according to claim 3, in which a contact protection is provided on the circumference of the central cylinder at the end located on the operating side. As a result, a safe replacement of the printing cylinder sleeve is also possible when the printing press is running, if due to the structural conditions no safety distance of 120 mm or more between the printing plate cylinder and the central cylinder can be maintained.

In einer speziellen Ausführungsform ist der Berührungsschutz beweglich angeordnet, und er wird nur dann in die wirksame Position gebracht, wenn der Druckplattenzylinder vom Zentralzylinder abgerückt ist. In diesem Fall kann der Berührungsschutz so gestaltet sein, daß er in seiner wirksamen Position in den Zwischenraum zwischen Druckzylinder und Zentralzylinder hineinragt und somit die Umfangsfläche des rotierenden Zentralzylinders ganz oder teilweise abschirmt.In a specific embodiment, the contact guard is movably mounted, and it is brought into the operative position only when the printing plate cylinder has moved away from the central cylinder. In this case, the contact protection can be designed so that it protrudes in its operative position into the space between the impression cylinder and the central cylinder and thus completely or partially shields the peripheral surface of the rotating central cylinder.

Im folgenden wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnung näher erläutert.In the following an embodiment of the invention will be explained in more detail with reference to the drawing.

Es zeigen:

Fig. 1
eine schematische Teilansicht einer Druckmaschine; die zur Durchführung des erfindungsgemäßen Verfahrens geeignet ist:
Fig. 2
einen Schnitt längs der Linie II-II in Figur 1;
Fig. 3
eine Ansicht entsprechend Figur 1, für den Zustand der Druckmaschine während des Wechsels einer Druckzylinderhülse; und
Fig. 4
einen Schnitt längs der Linie IV-IV in Figur 3.
Show it:
Fig. 1
a schematic partial view of a printing press; which is suitable for carrying out the process according to the invention:
Fig. 2
a section along the line II-II in FIG. 1 ;
Fig. 3
a view accordingly FIG. 1 for the condition of the printing press during the change of a printing cylinder sleeve; and
Fig. 4
a section along the line IV-IV in FIG. 3 ,

Die in Figuren 1 und 2 gezeigte Druckmaschine weist ein Maschinengestell mit Seitenteilen 10, 12 auf, zwischen denen ein drehantreibbarer Zentralzylinder 14 gelagert ist. Am Umfang des Zentralzylinders 14 sind mehrere Farbwerke angeordnet, von denen in der Zeichnung lediglich zwei Farbwerke 16, 18 dargestellt sind. Jedes Farbwerk weist einen gegen den Zentralzylinder 14 anstellbaren Druckplattenzylinder 20 und eine gegen den Druckplattenzylinder anstellbare Rasterwalze 22 auf. Im Druckbetrieb ist der Bedruckstoff (nicht gezeigt) schleifenförmig über den Umfang des Zentralzylinders 14 geführt, so daß er durch die Walzenspalte hindurchläuft, die der Zentralzylinder 14 mit jedem der Druckplattenzylinder 20 bildet. Die Rastenwalze 22 wird mit Hilfe einer nicht gezeigten Kammerrakel mit Druckfarbe eingefärbt und gibt die Druckfarbe an die Klischees weiter, die auf den Druckplattenzylinder 20 aufgespannt sind, so daß der durch den Walzenspalt laufende Bedruckstoff mit der Druckfarbe bedruckt wird.In the Figures 1 and 2 shown printing machine has a machine frame with side parts 10, 12, between which a rotatably driven central cylinder 14 is mounted. At the periphery of the central cylinder 14 a plurality of inking units are arranged, of which only two inking units 16, 18 are shown in the drawing. Each inking unit has an engageable against the central cylinder 14 printing plate cylinder 20 and an engageable against the printing plate cylinder anilox roller 22. In printing operation, the printing material (not shown) is looped over the circumference of the central cylinder 14 so as to pass through the nips which the central cylinder 14 forms with each of the printing plate cylinders 20. The detent roller 22 is inked by means of a chamber doctor blade, not shown, with ink and gives the ink to the stereotypes, which are clamped on the printing plate cylinder 20, so that the running through the nip printing material is printed with the ink.

Wenn die Druckmaschine für einen anderen Druckauftrag umgerüstet werden soll, so müssen zumindest die die Klischees tragenden Druckplattenzylinder 20 der benutzten Farbwerke ausgewechselt werden. Dabei kann sich auch der Durchmesser des Druckplattenzylinders ändern, falls in dem neuen Druckauftrag mit einer anderen Drucklänge gearbeitet werden soll. Oft ist es auch erforderlich, die Rasterwalze 22 auszuwechseln, um die Farbübertragungseigenschaften dieser Rasterwalze an den jeweiligen Druckauftrag und die verwendete Druckfarbe anzupassen.If the press is to be converted for another print job, so must be replaced at least the clichés bearing printing plate cylinder 20 of the used inking units. In this case, the diameter of the printing plate cylinder can change, if you want to work in the new job with a different print length. Often, it is also necessary to replace the anilox roller 22 to adjust the ink transfer properties of this anilox roller to the particular job and the ink used.

Der Druckplattenzylinder 20 ist mindestens zweiteilig aufgebaut und umfaßt einen drehbar im Maschinengestell gelagerten Dorn 24 und eine lösbar auf den Dorn aufgespannte Druckzylinderhülse 26, die an ihrem äußeren Umfang die Klischees trägt. Entsprechend weist auch die Rasterwalze 22 einen Dorn 28 und eine auswechselbare Hülse 30 auf.The printing plate cylinder 20 is at least in two parts and comprises a rotatably mounted in the machine frame mandrel 24 and a releasably mounted on the mandrel pressure cylinder sleeve 26 which carries on its outer periphery of the cliché. Accordingly, the anilox roller 22 has a mandrel 28 and a replaceable sleeve 30.

Der Dorn 24 des Druckplattenzylinders 20 jedes Farbwerkes ist in Lagerböcken 30. 32 gelagert, die verschiebbar an den Seitenteilen 10, 12 geführt sind, so daß der Druckplattenzylinder 20 an den Zentralzylinder 14 angestellt und von diesem wieder abgestellt werden kann. Das Seitenteil 10, das sich auf der Bedienungsseite der Druckmaschine befindet, bildet für jedes Farbwerk 16, 18 ein Fenster 34, durch das der Druckplattenzylinder 20 und die Rasterwalze 22 des betreffenden Farbwerkes zugänglich sind. Der an diesem Seitenteil 10 geführte Lagerbock 30 bildet ein Klapplager, das von dem Dorn 24 lösbar ist. Auf der gegenüberliegenden Seite, am Seitenteil 12, bildet der Lagerbock 32 ein kippstabiles Lager, mit dem der Dorn 24 auslegerartig gehalten wird, wenn das Klapplager auf der Bedienungsseite gelöst und entfernt wurde. Der Dorn 28 der Rasterwalze 22 ist auf entsprechende Weise in Lagerböcken 36, 38 gelagert.The mandrel 24 of the printing plate cylinder 20 of each inking unit is mounted in bearing blocks 30. 32, which are displaceably guided on the side parts 10, 12, so that the printing plate cylinder 20 can be made to the central cylinder 14 and turned off by this again. The side part 10, which is located on the operating side of the printing press, forms for each inking unit 16, 18, a window 34 through which the printing plate cylinder 20 and the anilox roller 22 of the respective inking unit are accessible. The guided on this side part 10 bearing block 30 forms a folding bearing, which is detachable from the mandrel 24. On the opposite side, on the side part 12, the bearing block 32 forms a tilt-stable bearing, with which the mandrel 24 is held like a boom, when the folding bearing has been solved on the operating side and removed. The mandrel 28 of the anilox roller 22 is mounted in a corresponding manner in bearing blocks 36, 38.

An dem Seitenteil 10 ist für jedes Farbwerk ein Berührungsschutz 40 angeordnet, der in dem betreffenden Fenster 34 liegt. Dieser Berührungsschutz 40 weist eine Stirnplatte 42 auf, die den Teil der Stirnfläche des Zentralzylinders 14 verkleidet, der hinter dem Fenster 34 liegt. Eine rechtwinklig von der Stirnplatte 42 vorspringende Schirmplatte 44 (Figur 2) ist so gekrümmt, daß sie der Umfangsfläche des Zentralzylinders 14 mit geringem radialen Abstand folgt. Ein Stellzylinder 46, beispielsweise ein Pneumatikzylinder, ist mit Hilfe einer Grundplatte 48 an dem Seitenteil 10 gehalten und ermöglicht es, den Berührungsschutz 40 in der Richtung parallel zur Achse des Zentralzylinders 14 zu verstellen. In dem in Figur 2 gezeigten Zustand ist der Berührungsschutz 40 in das Fenster 34 zurückgezogen, so daß die Schirmplatte 44 außerhalb des Walzenspaltes liegt, der zwischen der Druckzylinderhülse 26 und dem Zentralzylinder 14 gebildet wird.On the side part 10, a contact protection 40 is arranged for each inking unit, which lies in the respective window 34. This contact protection 40 has an end plate 42 which covers the part of the end face of the central cylinder 14 which lies behind the window 34. A right-angled protruding from the end plate 42 shield plate 44 ( FIG. 2 ) is curved so that it follows the peripheral surface of the central cylinder 14 with a small radial distance. A positioning cylinder 46, for example a pneumatic cylinder, is held by means of a base plate 48 on the side part 10 and makes it possible to adjust the contact protection 40 in the direction parallel to the axis of the central cylinder 14. In the in FIG. 2 As shown, the contact guard 40 is retracted into the window 34 so that the shield plate 44 is out of the nip formed between the impression cylinder sleeve 26 and the central cylinder 14.

In diesem Zustand kann das betreffende Farbwerk 16 zum Drucken benutzt werden. Entsprechendes gilt auch für das Farbwerk 18.In this state, the respective inking unit 16 can be used for printing. The same applies to the inking unit 18th

Als Beispiel soll nun angenommen werden, daß für den laufenden Druckauftrag nur das Farbwerk 18 benötigt wird, während das Farbwerk 16 unbenutzt ist. Unter diesen Umständen ist es möglich, das Farbwerk 16 schon während des laufenden Druckauftrags, also bei laufender Maschine, für den nächsten Druckauftrag umzurüsten. Zu diesem Zweck werden die Rasterwalze 22 und der Druckplattenzylinder 20 in die in Figur 3 gezeigten Positionen zurückgefahren. Zwischen der Umfangsfläche der Druckzylinderhülse 26 und der Umfangsfläche des Zentralzylinders 14 besteht dann ein Zwischenraum von beispielsweise 120 mm. Ebenso besteht auch ein gewisser Zwischenraum zwischen dem Umfang der Rasterwalze 22 und der Druckzylinderhülse 26. Zur Vorbereitung des Zylinderwechsels werden die Klapplager der Lagerböcke 30 und 36 gelöst, und die Lagerböcke 30, 36 werden zur Seite gefahren. Der Druckplattenzylinder 20 ist dann mit seinem Dorn 24 auslegerartig, frei auskragend, allein durch den Lagerbock 32 gehalten, und die Stirnfläche der Druckzylinderhülse 26 liegt auf der Bedienungsseite frei zugänglich im Fenster 34.As an example, let it be assumed that only the inking unit 18 is needed for the current print job, while the inking unit 16 is unused. Under these circumstances it is possible to retrofit the inking unit 16 during the current print job, ie while the machine is running, for the next print job. For this purpose, the anilox roller 22 and the printing plate cylinder 20 in the in FIG. 3 zurückgefahren positions shown. Between the peripheral surface of the pressure cylinder sleeve 26 and the peripheral surface of the central cylinder 14 then there is a gap of, for example, 120 mm. Likewise, there is also a certain gap between the circumference of the anilox roller 22 and the pressure cylinder sleeve 26. To prepare the cylinder change, the hinged bearings of the bearing blocks 30 and 36 are released, and the bearing blocks 30, 36 are moved to the side. The printing plate cylinder 20 is then cantilever-like with its mandrel 24, cantilevered, held solely by the bearing block 32, and the end face of the pressure cylinder sleeve 26 is freely accessible on the operating side in the window 34th

Mit Hilfe des Stellzylinders 46 wird der Berührungsschutz 40 in die in Figur 4 gezeigte Position ausgefahren, in der die Stirnplatte 42 dicht vor der Stirnfläche des Zentralzylinders 14 liegt und die Schirmplatte 44 den an das Fenster 34 angrenzenden Umfangsbereich des Zentralzylinders 14 abschirmt. Obgleich der Zentralzylinder 14 mit hoher Geschwindigkeit rotiert, kann der Benutzer gefahrlos in den Zwischenraum zwischen Zentralzylinder und Druckplattenzylinder greifen, um die Zylinderhülse 26 axial vom Dorn 24 abzuziehen, wie in Figur 4 gezeigt ist.With the help of the adjusting cylinder 46, the contact protection 40 in the in FIG. 4 shown extended position in which the end plate 42 lies close to the end face of the central cylinder 14 and the shield plate 44 shields the adjacent to the window 34 peripheral portion of the central cylinder 14. Although the central cylinder 14 rotates at high speed, the user can safely grasp the space between the center cylinder and the plate cylinder to axially withdraw the cylinder sleeve 26 from the mandrel 24, as in FIG FIG. 4 is shown.

Entsprechend kann, ebenfalls bei laufender Maschine, eine neue Druckzylinderhülse 26 wieder auf den Dorn 24 aufgeschoben werden. Zur Erleichterung dieses Auswechselvorgangs kann wahlweise ein Ausstoßersystem vorgesehen sein, wie es in der europäischen Patentanmeldung 99 119 764 beschrieben wird.Accordingly, also with the machine running, a new pressure cylinder sleeve 26 can be pushed back onto the mandrel 24. To facilitate this replacement operation may optionally be provided Ausstoßersystem, as shown in the European patent application 99 119 764 is described.

Wenn die neue Druckzylinderhülse 26 auf dem Dorn 24 festgespannt ist, beispielsweise mit Hilfe eines Hydrauliksystems, wird der Lagerbock 30 wieder in die Position gebracht, in der er das freie Ende des Doms 24 abstützt, und das Klapplager wird geschlossen. Der Lagerbock 30 befindet sich dann in einer Position, in der er auch das Auswechseln der Hülse der Rasterwalze 22 ermöglicht, sofern dies erforderlich ist.When the new pressure cylinder sleeve 26 is tightened on the mandrel 24, for example by means of a hydraulic system, the bearing block 30 is returned to the position in which it supports the free end of the mandrel 24 and the folding bearing is closed. The bearing block 30 is then in a position in which it also allows the replacement of the sleeve of the anilox roller 22, if necessary.

Die Umrüstung des Farbwerkes 16 auf den neuen Druckauftrag läßt sich somit vor Beendigung des vorherigen Druckauftrages bewerkstelligen, so daß ohne Zeitverlust mit dem neuen Druckauftrag begonnen werden kann. Wenn das Farbwerk 16 wieder in Betrieb genommen werden soll, wird der Berührungsschutz 40 wieder in die unwirksame Position gemäß Figuren 1 und 2 zurückgezogen, und der Druckplattenzylinder 20 und die Rasterwalze 20 werden wieder gegeneinander und gegen den Zentralzylinder 14 angestellt.The conversion of the inking unit 16 to the new print job can thus accomplish before the end of the previous print job, so that can be started without loss of time with the new print job. When the inking unit 16 is to be put back into operation, the contact protection 40 is again in the inoperative position according to Figures 1 and 2 withdrawn, and the printing plate cylinder 20 and the anilox roller 20 are again turned against each other and against the central cylinder 14.

Claims (6)

  1. A method of exchanging a printing cylinder sleeve (26) in a printing machine having a central cylinder (14) and a plurality of ink units (16, 18) adapted to be adjusted against the central cylinder, and comprising each a plate cylinder (20) having a printing cylinder sleeve (26) mounted on a mandrel (24), wherein the plate cylinder (20) is moved away from the central cylinder (14) and the printing cylinder sleeve (26) is axially withdrawn from the mandrel (24) after a bearing (30) has been detached, the exchange of the printing cylinder sleeve (26) being performed while the printing machine is running, characterized in that the plate cylinder (20) is moved away from the central cylinder (14) to such an extent that a space formed between the plate cylinder (20) and the rotating central cylinder (14) becomes large enough for safely gripping the printing cylinder sleeve (26), and after the plate cylinder (20) has been moved away from the central cylinder (14), a safeguard (40) is brought into a position in which it shields a part of an end face and of the peripheral surface of the central cylinder (14) facing the plate cylinder (20).
  2. Method according to claim 1, characterized in that said space formed between a peripheral surface of the printing cylinder sleeve (26) and the peripheral surface of the central cylinder (14) has a width of at least 120 mm when the cylinder sleeve is exchanged.
  3. Printing machine for carrying out the method of claim 1, comprising a central cylinder (14), and a plurality of ink units (16, 18) adapted to be adjusted against the central cylinder and each comprising a plate cylinder (20) having a printing cylinder sleeve (26) thrust onto a mandrel (24), characterized in that a safeguard (40) is mounted on the side of the printing machine to which the printing cylinder sleeve is withdrawn from the mandrel, said safeguard shielding an edge portion of the central cylinder (14) facing the plate cylinder (20), and in that, when the plate cylinder (20) is withdrawn from the central cylinder (14), a space is formed between the peripheral surface of the printing cylinder sleeve (26) and the safeguard (40), large enough to safely grip the printing cylinder sleeve (26) at its periphery and to withdraw it from the mandrel (24).
  4. Printing machine according to claim 3, characterized in that the safeguard (40) is adjustably mounted to the machine frame (10).
  5. Printing machine according to claim 4, characterized in that the safeguard (40) has a shield plate (44) extending essentially in parallel with the peripheral surface of the central cylinder (14), and is adjustable in the direction in parallel with the axis of rotation of the central cylinder (14) into an operative position in which the shield plate (44) shields a part of the peripheral surface of the central cylinder (14).
  6. Printing machine according to claim 5, characterized in that has a side member (10) of the machine frame has a window (34) through which the printing cylinder sleeve (26) can be withdrawn from the mandrel (24), and the safeguard (40) is withdrawable into said window (34).
EP01100301A 2001-01-04 2001-01-04 Method for changing a printing cylinder sleeve and printing machine for carrying out the method Expired - Lifetime EP1221367B2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE50109336T DE50109336D1 (en) 2001-01-04 2001-01-04 Method for changing a printing cylinder sleeve and printing machine for carrying out the method
EP01100301A EP1221367B2 (en) 2001-01-04 2001-01-04 Method for changing a printing cylinder sleeve and printing machine for carrying out the method
ES01100301T ES2258989T5 (en) 2001-01-04 2001-01-04 PROCEDURE FOR CHANGING A PRINT CYLINDER CAP AND PRINTING MACHINE FOR THE PERFORMANCE OF THIS PROCEDURE.
JP2001396628A JP2002234136A (en) 2001-01-04 2001-12-27 Method for replacing printing cylinder sleeve and printing machine for implementing the method
US10/038,779 US6644188B2 (en) 2001-01-04 2002-01-02 Method of exchanging a printing cylinder sleeve and printing machine for carrying out the method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01100301A EP1221367B2 (en) 2001-01-04 2001-01-04 Method for changing a printing cylinder sleeve and printing machine for carrying out the method

Publications (3)

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EP1221367A1 EP1221367A1 (en) 2002-07-10
EP1221367B1 EP1221367B1 (en) 2006-03-29
EP1221367B2 true EP1221367B2 (en) 2010-09-08

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EP01100301A Expired - Lifetime EP1221367B2 (en) 2001-01-04 2001-01-04 Method for changing a printing cylinder sleeve and printing machine for carrying out the method

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US (1) US6644188B2 (en)
EP (1) EP1221367B2 (en)
JP (1) JP2002234136A (en)
DE (1) DE50109336D1 (en)
ES (1) ES2258989T5 (en)

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US7089858B2 (en) * 2003-08-04 2006-08-15 Mitsubishi Heavy Industries, Ltd. Rotary press
ES2242520B1 (en) * 2004-01-14 2007-02-16 Comexi, S.A. AUTOMATIC DEVICE FOR HANDLING AND TRANSPORTATION OF PRINT SHIRTS.
EP1559546A1 (en) * 2004-01-28 2005-08-03 RDP Marathon Inc. Printing unit convertible between at least two printing modes
ITVR20040141A1 (en) * 2004-09-10 2004-12-10 Valentini Maria Grazia SUPPORT AND RELEASE DEVICE FOR A HUB OF A CYLINDER FOR PRINTING MACHINE.
US7735955B2 (en) 2005-12-05 2010-06-15 Silverbrook Research Pty Ltd Method of assembling printhead capping mechanism
US7758038B2 (en) * 2005-12-05 2010-07-20 Silverbrook Research Pty Ltd Printer having compact media pick-up device
US7270494B2 (en) * 2005-12-05 2007-09-18 Silverbrook Research Pty Ltd Easy assembly printer media transport arrangement
US7632032B2 (en) * 2005-12-05 2009-12-15 Silverbrook Research Pty Ltd Method of assembling printer media transport arrangement
US7681876B2 (en) * 2005-12-05 2010-03-23 Silverbrook Research Pty Ltd Printer having disengageably gear driven media pick-up roller
JP5042493B2 (en) * 2005-12-21 2012-10-03 旭化成イーマテリアルズ株式会社 Printing substrate
EP2100732A1 (en) * 2008-03-13 2009-09-16 Fischer & Krecke GmbH Method and calibration tool for calibrating a rotary printing press
FR2966379B1 (en) * 2010-10-25 2013-08-30 Dubuit Mach PRINTING MACHINE WITH INK JETS
ITMI20131003A1 (en) * 2013-06-18 2014-12-19 Nuova Gidue Srl DEVICE AND METHOD FOR THE REPLACEMENT OF THE PRINTING CYLINDERS OF A PRINTING GROUP, PARTICULARLY FOR ROTARY FLEXOGRAPHIC MACHINES IN LINE.
EP3137300B1 (en) * 2014-04-29 2017-12-06 Bobst Firenze S.r.l. Method and device for replacing the printing roller of a printing unit of a printing machine
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Also Published As

Publication number Publication date
EP1221367B1 (en) 2006-03-29
US6644188B2 (en) 2003-11-11
JP2002234136A (en) 2002-08-20
US20020108520A1 (en) 2002-08-15
ES2258989T3 (en) 2006-09-16
EP1221367A1 (en) 2002-07-10
DE50109336D1 (en) 2006-05-18
ES2258989T5 (en) 2011-01-17

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