EP0615841B1 - Printing machine - Google Patents
Printing machine Download PDFInfo
- Publication number
- EP0615841B1 EP0615841B1 EP94101516A EP94101516A EP0615841B1 EP 0615841 B1 EP0615841 B1 EP 0615841B1 EP 94101516 A EP94101516 A EP 94101516A EP 94101516 A EP94101516 A EP 94101516A EP 0615841 B1 EP0615841 B1 EP 0615841B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drive
- toothed belt
- printing machine
- rollers
- printing
- 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
Links
- 238000007774 anilox coating Methods 0.000 description 35
- 238000007598 dipping method Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 210000003746 feather Anatomy 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
Images
Classifications
-
- 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
- B41F31/00—Inking arrangements or devices
- B41F31/004—Driving means for ink rollers
Definitions
- the invention relates to a printing press, preferably a flexographic printing press, with an impression cylinder and a plurality of printing units, in which the bearings of the format cylinders and the inking units with the anilox rollers on guides of the printing press frame can be moved radially or almost radially to the impression cylinder and in which the drive of the format cylinders and Anilox rollers are derived from a central drive, preferably a central wheel, the anilox rollers being in drive connection with the central drive or the central wheel via a freewheel, and a continuous drive is provided for the anilox rollers that can be moved away from the format cylinders.
- Flexographic printing machines of this type are known, for example, from DE-OS 29 41 521, 34 37 216, 37 42 129 and 40 01 735.
- the impression cylinders as well as the format cylinders assigned to each impression cylinder and the raster and Dipping rollers of the inking units during normal printing operation are driven by a first central wheel, which meshes directly with the gears attached to the one shaft journal of the impression cylinders, while the drives of the format cylinders and the anilox and dipping rollers are derived from gear wheels wedged onto the other shaft journals.
- a second central wheel which can be driven by a servo motor, which drives the meshing drive wheels of the anilox and plunger rollers via gears that are freely rotatable on the journal of the impression cylinder and format cylinder , wherein a coupling device is provided which switches the drive of the second central wheel to the servomotor when the machine is at a standstill.
- European patent application 0 498 012 A1 also discloses a flexographic printing press with a single impression cylinder, to which several printing units consisting of printing cylinder and inking roller are assigned. Both the impression cylinder and the individual printing units are driven by a central drive gear.
- the main drive gear is assigned an auxiliary drive gear provided with the same number of teeth, which can be driven by a separate motor.
- By moving gear wheels assigned to the individual printing cylinders it is possible to connect the individual printing units to the main drive wheel during printing or to the auxiliary drive wheel during a standstill.
- an imperative requirement is that the speed of the main drive wheel is equal to the speed of the auxiliary drive wheel and that the teeth of the main drive wheel are aligned with the teeth of the auxiliary drive wheel. The design and construction effort required for this is very considerable.
- the object of the invention is therefore to provide a more simply constructed continuous drive for the inking unit rollers and in particular the anilox rollers of printing machines, in particular flexographic printing machines.
- this object is achieved in a printing machine of the type specified at the outset in that the continuous drive consists of a chain driven by a servo motor or a toothed belt which loops around all of the drive gears of the anilox rollers by deflecting them via deflection wheels, three of which are fixed to the frame and one each is arranged on the associated inking unit or anilox roller carriage in such a way that the strands of the toothed belt which run on and run from the deflection wheels arranged radially outside the anilox roller gear wheel and the strands of the toothed belt which surround the radially outer deflection wheels in parallel run to each other, and that the ink roller blocks or the anilox rollers can also be moved on their guides parallel to the parallel strands of the toothed belt.
- the anilox rollers can be moved in the direction of the impression cylinder and away from it for the purpose of exchanging format cylinders or in the event of interruptions in the printing operation, without any loosening of the toothed belt in relation to this, due to the parallel guidance of the runs of the toothed belt and the anilox roller blocks on the cogwheels driving the anilox rollers, because the parallel alignment of the splines of the timing belt always results in a length compensation. Since the drive of the toothed belt is coupled to the central drive or the central wheel via a freewheel in normal printing operation, the toothed belt can be driven easily by a continuous motor consisting of a servomotor when the machine is at a standstill. The servomotor expediently also drives the toothed belt via a freewheel, so that during normal printing operation the freewheel motor does not have to be uncoupled or dragged along.
- the anilox rollers are expediently driven by the central wheel via the toothed belt in that an intermediate toothed wheel meshes with the central wheel and a gear arranged on the drive shaft for the toothed belt.
- the toothed belt driving the anilox rollers is driven by the central wheel, without the drive gear wheels of the format cylinders being parts in the drive chains for the anilox rollers.
- the gear meshing with the intermediate gear is expediently provided with the freewheel.
- the drive shaft for the toothed belt is provided with a further gearwheel provided with a freewheel, which is in drive connection with the servo motor.
- the two freewheels are arranged on a common shaft that carries the drive gear for the toothed belt.
- the format cylinder gears can mesh directly with the gear, so that the format cylinders can be easily replaced.
- the flexographic printing press is basically of a known type, as is known for example from DE-OS 29 41 521, 34 37 216, 37 42 129 and 40 01 735, to which reference is made for a more detailed explanation.
- the flexographic printing machine shown in the drawing has a frame in which a common impression cylinder 1 is mounted for all printing units. Furthermore, the printing machine frame is provided on both sides with consoles, for example from DE-OS 29 41 521, which are provided with guides for the carriage carrying the format cylinder blocks, these format cylinder slides in turn being provided with guides for the inking block.
- the flexographic printing machine shown in the drawing only has one anilox roller 2, which is provided with an ink chamber doctor blade in a known and therefore not described manner.
- Each printing unit consists of a format cylinder 6, which is mounted in a format cylinder block and can be moved on a format cylinder slide, only the format cylinders 6 being indicated in the drawing.
- the inking unit slides are slidably mounted on the format cylinder slides in linear guides, on which the anilox rollers 2 are mounted in corresponding anilox roller blocks.
- a deflection wheel 7 for the toothed belt 4 is freely rotatably mounted on each inking unit carriage.
- the deflection wheel 7 can thus be moved together with the anilox roller 2 without this changing their relative position to one another.
- Deflection wheels 8 to 14 for the toothed belt 4 are mounted in the frame laterally offset to the inside of the impression cylinder 1.
- freely rotatable deflection wheels 15 for the toothed belt 4 are mounted in the frame 3.
- the deflecting wheels 7, 15 each assigned to a printing unit as well as the format roller 6 and the anilox roller 2 each have the same reference numerals.
- the toothed belt 4 is an endless toothed belt which is driven by the toothed belt drive wheel 18 by the servomotor 20 provided with a gear 19. In the area of the drive wheel 18, the toothed belt is guided over the deflection wheels 21, 22 fixed to the frame, so that it surrounds the drive wheel 18 in a loop-like manner.
- the toothed belt 4 is guided in a loop-like manner via the drive gearwheels 24 of the anilox rollers 2 in the manner shown in FIG.
- the strands 25 running from the inner frame-fixed deflection wheels 8 to 14 onto the deflection wheels 7 and the strands 26 of the toothed belt 4 running from the frame-fixed deflection wheels 15 to the inner frame-fixed deflection wheels 10 are parallel to one another. Furthermore, the runs 27, which run from the drive toothed wheels 24 of the anilox rollers 2 to the outer deflection wheels 15 fixed to the frame, are parallel to the runs 25, 26 , 26, 27 of the drive belt 4 are parallel.
- This type of reeving of the toothed belt 4 does not change its length when the anilox rollers 2 are moved, because the changes in length of the strands 25, 27 always correspond to each other when the anilox roller 2 is moved, so that the changing lengths of the strands are fully compensated of the timing belt 4 occurs.
- the inner frame-fixed deflection wheels 9, 10, 11, 12, 13 are each assigned two printing units, so that the number of deflection wheels can be avoided.
- a drive shaft 31 is mounted in the upper frame attachment 30 of the printing press frame, on which the drive wheel 18 for the toothed belt 4 is fixed by a feather key 32.
- the gear 34 is also placed over a freewheel 33, which meshes via an intermediate gear 35 with the central gear 36 connected to the impression cylinder 1.
- a gear 38 which meshes with the drive gear 39 of the gear servo motor 19, 20, is placed on the shaft 31 via a further freewheel 37.
- the toothed belt 4 is therefore driven by the central wheel 6 via the toothed wheel 34 provided with the freewheel 33, which rotates the shaft 31 provided with the drive wheel 18.
- the servomotor 20 When the machine is at a standstill, the servomotor 20 is switched on, so that the toothed belt 4 is driven at a lower speed via the pinion 39 and the gearwheel 38 provided with the freewheel 37.
- the format cylinders 6 are driven via the format cylinder drive gearwheels 40 which mesh directly with the central wheel 6.
- the format cylinder 6 can therefore be replaced without the drive for the anilox rollers having to be set up again.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rotary Presses (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Screen Printers (AREA)
Description
Die Erfindung betrifft eine Druckmaschine, vorzugsweise Flexodruckmaschine, mit einem Gegendruckzylinder und mehreren Druckwerken, bei der die Lagerungen der Formatzylinder und die Farbwerksböcke mit den Rasterwalzen auf Führungen des Druckmaschinengestells radial oder nahezu radial zu dem Gegendruckzylinder verfahrbar sind und bei der der Antrieb der Formatzylinder und der Rasterwalzen von einem zentralen Antrieb, vorzugsweise einem Zentralrad abgeleitet ist, wobei die Rasterwalzen über einen Freilauf in Antriebsverbindung mit dem zentralen Antrieb bzw. dem Zentralrad stehen und für die von den Formatzylindern abrückbaren Rasterwalzen ein Weiterlaufantrieb vorgesehen ist.The invention relates to a printing press, preferably a flexographic printing press, with an impression cylinder and a plurality of printing units, in which the bearings of the format cylinders and the inking units with the anilox rollers on guides of the printing press frame can be moved radially or almost radially to the impression cylinder and in which the drive of the format cylinders and Anilox rollers are derived from a central drive, preferably a central wheel, the anilox rollers being in drive connection with the central drive or the central wheel via a freewheel, and a continuous drive is provided for the anilox rollers that can be moved away from the format cylinders.
Flexodruckmaschinen dieser Art sind beispielsweise aus den DE-OS 29 41 521, 34 37 216, 37 42 129 und 40 01 735 bekannt.Flexographic printing machines of this type are known, for example, from DE-OS 29 41 521, 34 37 216, 37 42 129 and 40 01 735.
Bei Druckmaschinen und insbesondere auch bei Flexodruckmaschinen besteht das Problem, daß bei Maschinenstillständen die Farbe auf den Farbwalzen bzw. den Rasterwalzen antrocknet, so daß bei einem erneuten Anlauf und weiterem Betrieb der Maschine Störungen eintreten. Um hier Abhilfe zu schaffen, ist es bekannt, die Farbwalzen bzw. Rasterwalzen von den Formatzylinder abzurücken und langsam weiterlaufen zu lassen, so daß ein Antrocknen der Farbe auf den Farb- oder Rasterwalzen ausgeschlossen ist.The problem with printing presses and in particular also with flexographic printing presses is that the ink dries on the inking rollers or anilox rollers when the machine is at a standstill, so that malfunctions occur when the machine is restarted and operated again. In order to remedy this, it is known to move the inking rollers or anilox rollers away from the format cylinder and to let them run slowly, so that drying of the ink on the inking or anilox rollers is impossible.
Bei einer aus der DE-PS 742 317 bekannten Mehrfarben-Flexodruckmaschine werden die Gegendruckzylinder sowie die jedem Gegendruckzylinder zugeordneten Formatzylinder und die Raster- und Tauchwalzen der Farbwerke während des normalen Druckbetriebes von einem ersten Zentralrad angetrieben, das unmittelbar jeweils mit den auf den einen Wellenzapfen der Gegendruckzylinder befestigten Zahnrädern kämmt, während die Antriebe der Formatzylinder und der Raster- und Tauchwalzen von auf den anderen Wellenzapfen aufgekeilten Zahnrädern abgeleitet werden. Um bei Maschinenstillständen einen Weiterlauf der von den Formatzylindern abgerückten Raster- und Tauchwalzen zu gewährleisten, ist ein zweites, von einem Servomotor antreibbares Zentralrad vorgesehen, das über frei drehbar auf Achszapfen der Gegendruckzylinder und Formatzylinder aufgesetzte Zahnräder die miteinander kämmenden Antriebsräder der Raster- und Tauchwalzen antreibt, wobei eine Kupplungseinrichtung vorgesehen ist, die bei Maschinenstillständen den Antrieb des zweiten Zentralrades auf den Servomotor umschaltet.In a multi-color flexographic printing machine known from DE-PS 742 317, the impression cylinders as well as the format cylinders assigned to each impression cylinder and the raster and Dipping rollers of the inking units during normal printing operation are driven by a first central wheel, which meshes directly with the gears attached to the one shaft journal of the impression cylinders, while the drives of the format cylinders and the anilox and dipping rollers are derived from gear wheels wedged onto the other shaft journals. In order to ensure that the anilox and plunger rollers moved away from the format cylinders continue to run when the machine is at a standstill, a second central wheel, which can be driven by a servo motor, is provided, which drives the meshing drive wheels of the anilox and plunger rollers via gears that are freely rotatable on the journal of the impression cylinder and format cylinder , wherein a coupling device is provided which switches the drive of the second central wheel to the servomotor when the machine is at a standstill.
Dieser bekannte Weiterlaufantrieb ist jedoch von seinem Getriebeaufbau her sehr aufwendig. Weiterhin müssen auch bei einem Formatzylinderwechsel zum Antrieb der Farbwerkswalzen Zahnräder ausgetauscht werden.However, this known continuous drive is very complex in terms of its gear structure. In addition, gears must also be replaced when changing the format cylinder to drive the inking unit rollers.
Durch die europäische Patentanmeldung 0 498 012 A1 ist weiterhin eine Flexodruckmaschine mit einem einzigen Gegendruckzylinder bekannt, dem mehrere aus Druckzylinder und Farbauftragswalze bestehende Druckwerke zugeordnet sind. Dabei werden sowohl der Gegendruckzylinder wie auch die einzelnen Druckwerke von einem zentralen Antriebszahnrad angetrieben. Dem Hauptantriebszahnrad ist ein mit gleicher Zähnezahl versehenes Hilfsantriebszahnrad zugeordnet, das über einen separaten Motor antreibbar ist. Durch Verschieben von den einzelnen Druckzylindern zugeordneten Zahnrädern ist es dabei möglich, die einzelnen Druckwerke während des Druckes mit dem Hauptantriebsrad oder während eines Stillstandes mit dem Hilfsantriebsrad zu verbinden. Zwingende Voraussetzung ist dabei allerdings, daß die Drehzahl des Hauptantriebsrades gleich der Drehzahl des Hilfsantriebsrades ist und daß die Zähne des Hauptantriebsrades mit den Zähnen des Hilfsantriebsrades fluchten. Der hierzu erforderliche Konstruktions- und Bauaufwand ist sehr erheblich.European patent application 0 498 012 A1 also discloses a flexographic printing press with a single impression cylinder, to which several printing units consisting of printing cylinder and inking roller are assigned. Both the impression cylinder and the individual printing units are driven by a central drive gear. The main drive gear is assigned an auxiliary drive gear provided with the same number of teeth, which can be driven by a separate motor. By moving gear wheels assigned to the individual printing cylinders, it is possible to connect the individual printing units to the main drive wheel during printing or to the auxiliary drive wheel during a standstill. However, an imperative requirement is that the speed of the main drive wheel is equal to the speed of the auxiliary drive wheel and that the teeth of the main drive wheel are aligned with the teeth of the auxiliary drive wheel. The design and construction effort required for this is very considerable.
Aufgabe der Erfindung ist es daher, einen einfacher aufgebauten Weiterlaufantrieb für die Farbwerkswalzen und insbesondere die Rasterwalzen von Druckmaschinen, insbesondere Flexodruckmaschinen, zu schaffen.The object of the invention is therefore to provide a more simply constructed continuous drive for the inking unit rollers and in particular the anilox rollers of printing machines, in particular flexographic printing machines.
Erfindungsgemäß wird diese Aufgabe bei einer Druckmaschine der eingangs angegebenen Art dadurch gelöst, daß der Weiterlaufantrieb aus einer von einem Servomotor angetriebenen Kette oder aus einem Zahnriemen besteht, die oder der sämtliche Antriebszahnräder der Rasterwalzen durch Umlenkung über Umlenkräder schlaufenartig umschlingt, von denen jeweils drei gestellfest und jeweils eines auf dem zugehörigen Farbwerks- bzw. Rasterwalzenschlitten in der Weise angeordnet sind, daß die Trume des Zahnriemens, die auf die radial außerhalb des Rasterwalzenzahnrades angeordneten Umlenkräder auf- und von diesen ablaufen und die die jeweils radial äußeren Umlenkräder schlaufenartig einfassenden Trume des Zahnriemens parallel zueinander verlaufen, und daß die Farbwalzenböcke bzw. die Rasterwalzen ebenfalls auf ihren Führungen parallel zu den einander parallelen Trumen des Zahnriemens verfahrbar sind.According to the invention, this object is achieved in a printing machine of the type specified at the outset in that the continuous drive consists of a chain driven by a servo motor or a toothed belt which loops around all of the drive gears of the anilox rollers by deflecting them via deflection wheels, three of which are fixed to the frame and one each is arranged on the associated inking unit or anilox roller carriage in such a way that the strands of the toothed belt which run on and run from the deflection wheels arranged radially outside the anilox roller gear wheel and the strands of the toothed belt which surround the radially outer deflection wheels in parallel run to each other, and that the ink roller blocks or the anilox rollers can also be moved on their guides parallel to the parallel strands of the toothed belt.
Bei der erfindungsgemäßen Druckmaschine lassen sich aufgrund der Parallelführung der Trume des Zahnriemens und der Rasterwalzenböcke die Rasterwalzen beliebig in Richtung auf den Gegendruckzylinder und von diesem weg verfahren zum Zwecke des Austausches von Formatzylindern oder bei Unterbrechungen des Druckbetriebes, ohne daß dadurch eine Lose des Zahnriemens in bezug auf die die Rasterwalzen antreibenden Zahnräder eintritt, weil durch die Parallelführung der Trume des Zahnriemens immer ein Längenausgleich stattfindet. Da im normalen Druckbetrieb der Antrieb des Zahnriemens über einen Freilauf an den zentralen Antrieb bzw. das Zentralrad angekuppelt ist, kann bei Maschinenstillständen der Zahnriemen problemlos von einem aus einem Servomotor bestehenden Weiterlaufmotor angetrieben werden. Zweckmäßigerweise treibt auch der Servomotor über einen Freilauf den Zahnriemen an, so daß bei einem normalen Druckbetrieb weder der Freilaufmotor abgekuppelt noch mitgeschleppt werden muß.In the printing machine according to the invention, the anilox rollers can be moved in the direction of the impression cylinder and away from it for the purpose of exchanging format cylinders or in the event of interruptions in the printing operation, without any loosening of the toothed belt in relation to this, due to the parallel guidance of the runs of the toothed belt and the anilox roller blocks on the cogwheels driving the anilox rollers, because the parallel alignment of the splines of the timing belt always results in a length compensation. Since the drive of the toothed belt is coupled to the central drive or the central wheel via a freewheel in normal printing operation, the toothed belt can be driven easily by a continuous motor consisting of a servomotor when the machine is at a standstill. The servomotor expediently also drives the toothed belt via a freewheel, so that during normal printing operation the freewheel motor does not have to be uncoupled or dragged along.
Zweckmäßigerweise sind die Rasterwalzen über den Zahnriemen dadurch von dem zentralrad angetrieben, daß ein Zwischenzahnrad mit dem Zentralrad und einem auf der Antriebswelle für den Zahnriemen angeordneten Zahnrad kämmt. Auf diese Weise ist der die Rasterwalzen antreibende Zahnriemen von dem Zentralrad angetrieben, ohne daß die Antriebszahnräder der Formatzylinder Teile in den Antriebsketten für die Rasterwalzen sind.The anilox rollers are expediently driven by the central wheel via the toothed belt in that an intermediate toothed wheel meshes with the central wheel and a gear arranged on the drive shaft for the toothed belt. In this way, the toothed belt driving the anilox rollers is driven by the central wheel, without the drive gear wheels of the format cylinders being parts in the drive chains for the anilox rollers.
Zweckmäßigerweise ist das mit dem Zwischenzahnrad kämmende Zahnrad mit dem Freilauf versehen.The gear meshing with the intermediate gear is expediently provided with the freewheel.
Nach einer bevorzugten Ausführungsform ist vorgesehen, daß die Antriebswelle für den Zahnriemen mit einem weiteren mit einem Freilauf versehenen Zahnrad versehen ist, das mit dem Servomotor in Antriebsverbindung steht. Auf diese Weise sind die beiden Freiläufe auf einer gemeinsamen Welle angeordnet, die das Antriebszahnrad für den Zahnriemen trägt.According to a preferred embodiment, it is provided that the drive shaft for the toothed belt is provided with a further gearwheel provided with a freewheel, which is in drive connection with the servo motor. In this way, the two freewheels are arranged on a common shaft that carries the drive gear for the toothed belt.
Die Formatzylinder-Zahnräder können unmittelbar mit dem Zahnrad kämmen, so daß ein einfacher Austausch der Formatzylinder möglich ist.The format cylinder gears can mesh directly with the gear, so that the format cylinders can be easily replaced.
Bei neueren Farbwerken und insbesondere Farbwerken für Flexodruckmaschinen ist nur noch eine Rasterwalze vorgesehen, die mit einer bekannten Farbkammerrakel versehen ist, in die die Druckfarbe unmittelbar eingeleitet und aus der diese wieder abgezogen wird. Derartige bekannte Farbkammerrakel benötigen keine an die Rasterwalzen angestellten Tauchwalzen mehr.In newer inking units and in particular inking units for flexographic printing machines, only one anilox roller is provided, which is provided with a known ink chamber doctor blade, into which the printing ink is introduced immediately and from which it is drawn off again. Known ink chamber doctor blades of this type no longer require immersion rollers placed on the anilox rollers.
Ein Ausführungsbeispiel der Erfindung wird nachstehend anhand der Zeichnung näher erläutert. In dieser zeigt:
- Fig. 1
- eine Seitenansicht einer Flexodruckmaschine mit sechs Druckwerken in schematischer Darstellung und
- Fig. 2
- einen Längsschnitt durch die Flexodruckmaschine nach Fig. 1.
- Fig. 1
- a side view of a flexographic printing machine with six printing units in a schematic representation and
- Fig. 2
- 2 shows a longitudinal section through the flexographic printing machine according to FIG. 1.
Die Flexodruckmaschine ist grundsätzlich bekannter Bauart, wie sie beispielsweise aus den DE-OS 29 41 521, 34 37 216, 37 42 129 und 40 01 735 bekannt ist, auf die zur näheren Erläuterung verwiesen wird. Die in der Zeichnung dargestellte Flexodruckmaschine weist ein Gestell auf, in dem für alle Druckwerke ein gemeinsamer Gegendruckzylinder 1 gelagert ist. Weiterhin ist das Druckmaschinengestell auf beiden Seiten mit beispielsweise aus der DE-OS 29 41 521 ersichtlichen Konsolen versehen, die mit Führungen für die die Formatzylinderböcke tragenden Schlitten versehen sind, wobei diese Formatzylinderschlitten ihrerseits mit Führungen für die Farbwerksböcke versehen sind. Während bei der anhand der DE-OS 29 41 521 beschriebenen Ausführungsform die Farbwerke aus Tauchwalzen und Einfärbwalzen bestehen, weist die in der Zeichnung dargestellte Flexodruckmaschine nur noch eine Rasterwalze 2 auf, die in bekannter und daher nicht beschriebener Weise mit einer Farbkammerrakel versehen ist.The flexographic printing press is basically of a known type, as is known for example from DE-OS 29 41 521, 34 37 216, 37 42 129 and 40 01 735, to which reference is made for a more detailed explanation. The flexographic printing machine shown in the drawing has a frame in which a
Der besseren Übersichtlichkeit halber sind in Fig. 1 nur das Gestell 3 der Flexodruckmaschine und darüber im wesentlichen nur die Führung des Zahnriemens 4 dargestellt, der dem gemeinsamen Antrieb sämtlicher Antriebsräder 5 der Rasterwalzen 2 dient.For the sake of clarity, only the
In dem Gestell 3 sind auf der linken und auf der rechten Seite jeweils drei Druckwerke angeordnet. Jedes Druckwerk besteht aus einer in einem Formatzylinderblock gelagerten und auf einem Formatzylinderschlitten verfahrbaren Formatzylinder 6, wobei in der Zeichnung jeweils nur die Formatzylinder 6 angedeutet sind. Auf den Formatzylinderschlitten sind in geradlinigen Führungen die Farbwerksschlitten verschieblich gelagert, auf denen in entsprechenden Rasterwalzenblöcken die Rasterwalzen 2 gelagert sind.In the
Darüber hinaus ist auf jedem Farbwerksschlitten ein Umlenkrad 7 für den Zahnriemen 4 frei drehbar gelagert. Das Umlenkrad 7 ist also jeweils zusammen mit der Rasterwalze 2 verfahrbar, ohne daß diese ihre relative Stellung zueinander ändern. In dem Gestell sind seitlich des Gegendruckzylinders 1 nach innen hin versetzt Umlenkräder 8 bis 14 für den Zahnriemen 4 gelagert.In addition, a
Radial auswärts von den Rasterwalzen 2 sind im Gestell 3 frei drehbare Umlenkräder 15 für den Zahnriemen 4 gelagert. Die jeweils einem Druckwerk zugeordneten Umlenkräder 7, 15 sowie die Formatwalze 6 und die Rasterwalze 2 tragen jeweils dieselben Bezugszeichen.Radially outward from the
Der Zahnriemen 4 ist ein endloser Zahnriemen, der durch das Zahnriemen-Antriebsrad 18 durch den mit einem Getriebe 19 versehenen Servomotor 20 angetrieben wird. Im Bereich des Antriebsrades 18 ist der Zahnriemen über die gestellfesten Umlenkräder 21, 22 geführt, so daß er das Antriebsrad 18 schlaufenartig einfaßt.The toothed belt 4 is an endless toothed belt which is driven by the toothed
Zwischen den auf dem Farbwerksschlitten gelagerten Umlenkrad 7 und dem gestellfesten Umlenkrad 15 ist der Zahnriemen 4 jeweils über die Antriebszahnräder 24 der Rasterwalzen 2 in der aus Fig. 1 ersichtlichen Weise schlaufenartig geführt.Between the
Die jeweils von den inneren gestellfesten Umlenkrädern 8 bis 14 auf die Umlenkräder 7 auflaufenden Trume 25 und die von den gestellfesten Umlenkrädern 15 zu den inneren gestellfesten Umlenkrädern 10 laufenden Trume 26 des Zahnriemens 4 sind zueinander parallel. Weiterhin sind auch die Trume 27, die von den Antriebszahnrädern 24 der Rasterwalzen 2 zu den äußeren gestellfesten Umlenkrädern 15 laufen, parallel zu den Trumen 25, 26. Schließlich sind auch die Rasterwalzen 2 auf den Rasterwalzenschlitten auf Bahnen 28 verfahrbar, die zu den Trumen 25, 26, 27 des Antriebsriemens 4 parallel sind. Durch diese Art der Einscherung der Zahnriemen 4 ändert sich deren Länge bei einem Verfahren der Rasterwalzen 2 nicht, weil immer die Längenänderungen der Trume 25, 27 bei einem Verfahren der Rasterwalze 2 sich einander entsprechen, so daß eine vollständige Kompensation der sich ändernden Längen der Trume des Zahnriemens 4 eintritt.The
Im dargestellten Ausführungsbeispiel sind die inneren gestellfesten Umlenkräder 9, 10, 11, 12, 13 jeweils zwei Druckwerken zugeordnet, so daß die Anzahl der Umlenkräder vermieden werden kann.In the illustrated embodiment, the inner frame-fixed
Der Antrieb des Zahnriemens 4 wird nun anhand der Zeichnung 2 näher erläutert. In dem oberen Gestellaufsatz 30 des Druckmaschinengestells ist eine Antriebswelle 31 gelagert, auf die fest das Antriebsrad 18 für den Zahnriemen 4 durch eine Paßfeder 32 aufgesetzt ist. Auf die Antriebswelle 31 ist weiterhin über einen Freilauf 33 das Zahnrad 34 aufgesetzt, das über ein Zwischenrad 35 mit dem mit dem Gegendruckzylinder 1 verbundenen Zentralrad 36 kämmt. Schließlich ist auf die Welle 31 über einen weiteren Freilauf 37 ein Zahnrad 38 aufgesetzt, das mit dem Antriebszahnrad 39 des Getriebe-Servomotors 19, 20 kämmt.The drive of the toothed belt 4 will now be explained in more detail with reference to drawing 2. A
Beim normalen Druckbetrieb wird daher der Zahnriemen 4 von dem Zentralrad 6 über das mit dem Freilauf 33 versehene Zahnrad 34 angetrieben, das die mit dem Antriebsrad 18 versehene Welle 31 in Drehung versetzt.In normal printing operation, the toothed belt 4 is therefore driven by the
Bei Maschinenstillständen wird der Servomotor 20 eingeschaltet, so daß der Zabnriemen 4 mit geringerer Geschwindigkeit über das Ritzel 39 und das mit dem Freilauf 37 versehene Zahnrad 38 angetrieben wird.When the machine is at a standstill, the
Die Formatzylinder 6 werden über die Formatzylinder-Antriebszahnräder 40 angetrieben, die unmittelbar mit dem Zentralrad 6 kämmen. Die Formatzylinder 6 lassen sich daher austauschen, ohne daß auch der Antrieb für die Rasterwalzen neu eingerichtet werden müßte.The
Claims (6)
- Printing machine, preferably flexographic printing machine, with an impression cylinder (1) and with a plurality of printing units, in which machine the mountings of the format cylinders (6) and the inking-unit trestles together with the engraved rollers (2) are movable on guides of the printing-machine stand (3) radially or virtually radially relative to the impression cylinder (1), and in which machine the drive for the format cylinders (6) and for the engraved rollers (2) is derived from a central drive, preferably a central wheel (1), the engraved rollers (2) being drive-connected to the central drive or the central wheel (36) via a freewheel (33), and a run-on drive being provided for the engraved rollers (2) movable away from the format cylinders (6), characterized in that the run-on drive consists of a chain or toothed belt (4) which is driven by a servomotor (19, 20) and which is slung in a loop-like manner round all the driving gearwheels (24) of the engraved rollers (2) by being deflected via deflecting wheels (8-14, 7, 15), of which in each case three are arranged fixedly relative to the stand and in each case one (7) is arranged on the associated inking-unit or engraved-roller carriage, in such a way that the strands (25, 26) of the toothed belt (4) which run onto the deflecting wheels (7, 15), arranged radially outside the engraved-roller gearwheel (24) and off from these, and the strands (26, 27) of the toothed belt (4) which surround in a loop-like manner the respective radially outer deflecting wheels (15) extend parallel to one another; and in that the inking-roller trestles or the engraved rollers are likewise movable on their guides parallel to the mutually parallel strands (25, 26, 27) of the toothed belt (4).
- Printing machine according to Claim 1, characterized in that the servomotor (20) drives the toothed belt (4) via a freewheel (37).
- Printing machine according to Claim 1 or 2, characterized in that the engraved rollers (2) are driven by the central wheel (36) via the toothed belt (4) in that an intermediate gearwheel (33) meshes with the central wheel (36) and with a gearwheel (34) arranged on the driveshaft (31) for the toothed belt (4).
- Printing machine according to Claim 3, characterized in that the gearwheel (34) meshing with the intermediate gearwheel (33) is provided with the freewheel (33).
- Printing machine according to one of Claims 1 to 4, characterized in that the driveshaft (31) for the toothed belt (4) is provided with a further gearwheel (38) which is provided with a freewheel (37) and which is drive-connected to the servomotor (20).
- Printing machine according to one of Claims 1 to 5, characterized in that the format-cylinder gearwheels (40) mesh directly with the central wheel (36).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4308492 | 1993-03-17 | ||
| DE4308492A DE4308492A1 (en) | 1993-03-17 | 1993-03-17 | Printing press |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0615841A1 EP0615841A1 (en) | 1994-09-21 |
| EP0615841B1 true EP0615841B1 (en) | 1996-05-01 |
Family
ID=6483040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94101516A Expired - Lifetime EP0615841B1 (en) | 1993-03-17 | 1994-02-02 | Printing machine |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5413038A (en) |
| EP (1) | EP0615841B1 (en) |
| JP (1) | JP2801852B2 (en) |
| CA (1) | CA2119342A1 (en) |
| DE (2) | DE4308492A1 (en) |
| ES (1) | ES2086241T3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3095603A1 (en) * | 2015-05-22 | 2016-11-23 | Windmöller & Hölscher KG | Printing machine and method for positioning a plurality of inking units of a printing machine |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19611048A1 (en) * | 1996-03-20 | 1997-09-25 | Windmoeller & Hoelscher | Printing machine, preferably flexographic printing machine |
| DE19627478C2 (en) * | 1996-07-08 | 1998-04-23 | Windmoeller & Hoelscher | Printing press |
| DE19651816C2 (en) * | 1996-12-13 | 1999-10-28 | Roland Man Druckmasch | Drive device for a roller of an ink container |
| DE19716943A1 (en) * | 1997-04-22 | 1998-11-05 | Windmoeller & Hoelscher | Synchronising control for print cylinder |
| IT1314383B1 (en) † | 2000-02-18 | 2002-12-13 | Uteco S P A Roto Flexo & Conve | MULTI-COLOR ROTARY FLEXOGRAPHIC PRINTING MACHINE |
| DE10143871C1 (en) * | 2001-09-07 | 2003-03-13 | Roland Man Druckmasch | Inking mechanism, for printing machine, has single drive used for driving inking rollers and displacement of inking rollers relative to printing cylinder |
| DK176859B1 (en) * | 2003-04-01 | 2010-01-04 | Tresu Anlaeg As | Printing plant, printing machine with such printing plant, tools for use in the printing machine and method for using the printing plant for printing with flexo colors and varnish |
| EP1728628A1 (en) | 2005-06-01 | 2006-12-06 | Kba-Giori S.A. | Typographic printing machine with independent drive means |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1519544A (en) * | 1921-07-22 | 1924-12-16 | Niagara Paper Mills | Multicolor-printing press |
| DE742317C (en) * | 1940-04-13 | 1943-11-27 | Windmoeller & Hoelscher | Multicolor aniline printing machine |
| US2836115A (en) * | 1955-05-24 | 1958-05-27 | Donald J Page | Rotary web aniline press |
| US3791294A (en) * | 1972-01-17 | 1974-02-12 | Gloucester Eng Co Inc | Printing press |
| DE2941521C2 (en) * | 1979-10-12 | 1982-11-25 | Windmöller & Hölscher, 4540 Lengerich | Process for replacing the forme cylinder of a flexographic printing machine |
| DE3150833C2 (en) * | 1981-12-22 | 1983-12-22 | Windmöller & Hölscher, 4540 Lengerich | Flexographic printing machine |
| GB2143474A (en) * | 1983-06-06 | 1985-02-13 | Cruiser Newspaper Components I | Printing machine |
| DE3437216A1 (en) * | 1984-10-10 | 1986-04-10 | Windmöller & Hölscher, 4540 Lengerich | FLEXO PRINTING MACHINE WITH SEVERAL INKS AND FORM CYLINDERS |
| DE3742129A1 (en) * | 1987-12-11 | 1989-06-22 | Windmoeller & Hoelscher | PRINTING MACHINE |
| DE4001735A1 (en) * | 1990-01-22 | 1991-07-25 | Windmoeller & Hoelscher | DEVICE FOR PROCESSING SHAFT BEARING BEARINGS |
| EP0498012A1 (en) * | 1991-02-07 | 1992-08-12 | FISCHER & KRECKE GMBH & CO. KG | Flexographic printing machine with auxilliary gear for switching between two driving modes |
-
1993
- 1993-03-17 DE DE4308492A patent/DE4308492A1/en not_active Withdrawn
-
1994
- 1994-02-02 DE DE59400238T patent/DE59400238D1/en not_active Expired - Fee Related
- 1994-02-02 EP EP94101516A patent/EP0615841B1/en not_active Expired - Lifetime
- 1994-02-02 ES ES94101516T patent/ES2086241T3/en not_active Expired - Lifetime
- 1994-03-11 US US08/208,522 patent/US5413038A/en not_active Expired - Fee Related
- 1994-03-11 JP JP6041143A patent/JP2801852B2/en not_active Expired - Fee Related
- 1994-03-17 CA CA002119342A patent/CA2119342A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3095603A1 (en) * | 2015-05-22 | 2016-11-23 | Windmöller & Hölscher KG | Printing machine and method for positioning a plurality of inking units of a printing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| US5413038A (en) | 1995-05-09 |
| JP2801852B2 (en) | 1998-09-21 |
| JPH071721A (en) | 1995-01-06 |
| EP0615841A1 (en) | 1994-09-21 |
| CA2119342A1 (en) | 1994-09-18 |
| ES2086241T3 (en) | 1996-06-16 |
| DE4308492A1 (en) | 1994-09-22 |
| DE59400238D1 (en) | 1996-06-05 |
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