EP0352483A2 - Flexographic press - Google Patents

Flexographic press Download PDF

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Publication number
EP0352483A2
EP0352483A2 EP89111563A EP89111563A EP0352483A2 EP 0352483 A2 EP0352483 A2 EP 0352483A2 EP 89111563 A EP89111563 A EP 89111563A EP 89111563 A EP89111563 A EP 89111563A EP 0352483 A2 EP0352483 A2 EP 0352483A2
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EP
European Patent Office
Prior art keywords
cylinder
printing
drive
web
printing form
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.)
Granted
Application number
EP89111563A
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German (de)
French (fr)
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EP0352483B1 (en
EP0352483A3 (en
Inventor
Wolfgang Ertl
Erwin Melischko
Otto Schmidt
Hans Schadl
Hermann Ermer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heidelberg Web Carton Converting GmbH
Original Assignee
BHS Bayerische Berg Hutten und Salzwerke AG
BHS Druck und Veredelungstechnik GmbH
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Application filed by BHS Bayerische Berg Hutten und Salzwerke AG, BHS Druck und Veredelungstechnik GmbH filed Critical BHS Bayerische Berg Hutten und Salzwerke AG
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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
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/004—Electric or hydraulic features of drives
    • B41F13/0045—Electric driving devices

Definitions

  • the invention relates to a flexographic printing machine, in particular a multicolor flexographic printing machine, according to the preamble of claim 1.
  • the impression cylinder on the one hand and the printing form cylinder pressing the web to be printed against the impression cylinder are driven by a common drive train, the two cylinders being connected to one another via gear wheels. Both cylinders must be at the pressure point, i.e. at their point of contact, at which the printing form cylinder against the web is pressed, have the same peripheral speed. To ensure this, the diameter of the printing form cylinder is always identical to the pitch circle diameter of the gear wheel assigned to the printing form cylinder. If any format length changes occur, then the diameter of the printing form cylinder must be changed accordingly, since the format length is equal to the circumferential extent of the printing form cylinder.
  • the impression cylinder and impression cylinder together with the associated gears must be replaced. This is not feasible for cost reasons. If in each case the impression cylinder is to remain unchanged, changes in the diameter of the printing form cylinder are only possible in accordance with the tooth pitch of the gear wheels coupling the impression cylinder with the printing form cylinder. If, for example, the tooth pitch is 5 mm, then only format length changes in steps of 5 mm are possible, ie only diameter changes of the printing form cylinder are possible in steps of approximately 1.6 mm.
  • the printing rollers of several printing units arranged one behind the other are driven by a common drive train.
  • the web to be printed is pressed with a so-called pressurizer, a pressure roller, with high force against the gravure roller made of steel.
  • pressurizer a so-called pressurizer
  • pressure roller a pressure roller
  • high force against the gravure roller made of steel These pressers need not be driven. Because of the pressure sensitivity of the printing form cylinders of a flexographic printing machine, such a solution cannot be considered for the generic machine.
  • a rotary rotary flexographic printing press which has one or more printing form cylinders, each of which is assigned two impression cylinders.
  • Each printing unit formed in this way has its own drive.
  • a drive that is completely independent of the drive of the respective printing unit is provided for the web to be printed.
  • the impression cylinders, each associated with a printing form cylinder, and additional guide rollers for the web to be printed, make it possible for the web to come into engagement with the printing form cylinder only at the points at which the respective impression cylinder is located.
  • the invention is therefore based on the object of designing a flexographic printing machine, in particular a multi-color flexographic printing machine, of the generic type in such a way that a continuous adaptation to changes in format length is possible with simple means.
  • the measures according to the invention make it possible for printing form cylinders of any diameter to be used to adapt to changes in format length, without the impression cylinder and a possibly still actuating positioning cylinder having to be exchanged.
  • the drive train of the impression cylinder gives the reference variable.
  • the synchronization control can take place via corresponding continuously variable transmissions in at least one drive train.
  • the advantageous further development according to claim 2 is particularly simple.
  • the multi-color flexographic printing machine shown in the drawing has several basically identical printing units 1, 1 ', 1 ⁇ .
  • Each printing unit has a printing form cylinder 2 to which the printing form is attached.
  • the printing form cylinder 2 bears against a raster cylinder 3, by means of which 4 color is transferred to the printing form cylinder 2 from an ink container.
  • the printing form cylinder 2 is also in contact with an impression cylinder 5, against which in turn a contact cylinder 6, for example of the same diameter, bears.
  • the impression cylinder 5 and the raster cylinder 3 are coupled to one another in terms of drive.
  • the first printing unit 1 is preceded by a so-called web inlet train group 7, from which a web in the form of a roll 8 of material to be printed, for example paper, plastic film, metal foil, metal-laminated paper web or the like, is drawn off.
  • This web 9 is guided via a deflection roller 10 and a dancer roller 11 to a pair of take-off rollers 12 which consist of a transport roller 14 driven by a motor 13 and a counterpressure roller 15 pressing the web 9 against the transport roller 14 and thus ensuring transport consists.
  • the web 9 is guided to the first printing unit 1, where it is guided around the positioning cylinder 6 and between the positioning cylinder 6 and the impression cylinder 5 around the latter. It is pressed by the impression cylinder 5 against the printing form cylinder 2, the image on the printing form cylinder 2 being transferred to the web 9 when the printing form cylinder 2 and the impression cylinder 5 are rotated accordingly.
  • the web 9 then runs via a register cylinder 16 to the second printing unit 1 'through which the web 9 is guided in the same way.
  • the register cylinder 16 is used to adjust the web length between two adjacent printing units 1, 1 'so that a register-correct printing takes place in the successive printing units 1, 1'. From there it runs again via a register cylinder 16 to the next printing unit 1 ⁇ , through which it is also guided in the same way. This continues as often as there are printing units. From the last printing unit 1 ⁇ , the web 9 is guided to a web discharge train group 17. This Bru-Auslaufzuen 17 corresponds in its structure to the Bru-Einlaufzugen 7.
  • a single drive train 19 which consists of an electric drive motor 20 and several this in series downstream reduction and deflection gear 21, which are connected via drive shafts 22 so that all gears 21 are driven in the same way.
  • Each transmission 21 is connected via an output shaft 23 with the printing form cylinder 2 of a printing unit 1 or 1 'or 1 ⁇ drive.
  • the respective output shaft 23 is accordingly at the same time the drive shaft of the corresponding printing form cylinder 2.
  • All impression cylinders 5 are driven by a second drive train 24, which likewise has a drive motor 25 and a reduction and deflection gear 26 arranged downstream thereof. They are connected in series with one another and connected to one another via drive shafts 27. From each gear 26, an output shaft 28 is guided to the corresponding impression cylinder 5 of a printing unit 1 or 1 'or 1', for the drive it serves.
  • the printing form cylinder 2 on the one hand and the impression cylinder 5 on the other hand of each printing unit 1 or 1 'or 1' are driven by a separate drive train 19 or 24.
  • the two drive motors 20 and 25 are coupled to one another via a digital synchronous control 29, the drive train 24 driving the counter-pressure cylinders 5 providing the reference variable.
  • the drive motor 25 with a conventional one with the Provided motor shaft coupled rotary pulse generator 30, which emits a predetermined number of pulses per revolution of the shaft of the drive motor 25. These are fed to a control device 31, where they are converted into control pulses for the drive motor 20.
  • This is also provided with a rotary pulse generator 32, which uses its corresponding pulses to give an actual speed feedback to the control device 31.
  • the drive motor 20 adheres exactly to a speed which is in a fixed relationship to the speed of the drive motor 25 which can be predetermined via the control device 31.
  • the drive speeds of all impression cylinders 5, on the one hand, and all printing form cylinders 2, on the other hand are exactly in a predetermined relationship to one another, which is selected such that the peripheral speeds of the printing form cylinders 2 and the impression cylinder 5, on the other hand, are each identical, so that at the respective pressing point 33 , in which the web 9 is pressed by the respective impression cylinder 5 against the respective printing form cylinder 2, no slip occurs.
  • the impression cylinder 5 does not need to be replaced.
  • Digital synchronization controls 29 are commercially available. They are manufactured, for example, by Siemens AG, Kunststoff, Federal Republic of Germany, and sold under the name "digital controller A8.302 (A8.301) for speed, position and synchronous control”.
  • the gearboxes 21 and 26 need not be designed as a continuously variable control gearbox. Rather, they can have a fixed reduction ratio, since the entire adaptation to different speed ratios between printing form cylinders 2 on the one hand and counter-pressure cylinders 5 on the other hand can be carried out via the control device 31 of the synchronous control 29.
  • FIG. 1 the multicolor flexographic printing machine shown only schematically in FIG. 1 is shown in a longitudinal side view and a partial sectional view. 2 and 3, identical reference numerals are used for the same parts, to which only an "a” is added. In this respect, a new description is usually not necessary.
  • the drive trains 19, 24 are not shown in FIG. 2.
  • each printing unit 1a, 1'a and 1 ⁇ a is housed in its own frame 36, 37, 38. All are arranged one behind the other in the working direction 39.
  • Each printing unit 1a, 1'a, 1 ⁇ a is followed by a dryer 40 through which the web 9a is guided in order to evaporate the solvent of the printing ink.
  • the respective dryer 40 is then followed by a cooling cylinder 41, over which the web 9a heated in the dryer 40 is guided.
  • the cylinders of a printing unit 1'a - and all printing units 1a and 1 ⁇ a which are identical in this respect - are mounted in opposing frame walls 42, 43.
  • the bearings 44 of the printing form cylinder 2a are arranged in carriages 45 which are vertically displaceable in corresponding guides 46 in the frame walls 42, 43. They can be displaced parallel to one another by means of an infeed drive 47, for example in the form of a hand crank wheel, via deflecting gear 48 and spindles 49, as a result of which the printing form cylinder 2a is fed against the impression cylinder 5a or is lifted off the latter.
  • the output shaft 23a is designed as a cardan shaft. For this purpose, it is connected on the one hand to an output pin 51 of the transmission 21a and, on the other hand, to a shaft pin 52 of the printing form cylinder 2a, each via an articulated coupling 53 or 54.
  • a drive gear 55 is rotatably mounted on the output shaft 28a for the impression cylinder 5a, via which the Ra not recognizable in Fig. 3 Ster cylinder 3a is driven.
  • a vibration-damping clutch 56 is connected in the output shaft 28a.
  • the gears 21a and 26a are arranged one on top of the other and are supported by a holding arm 57 against a frame wall 43.
  • the drive trains 19a and 24a are thus also supported and fixed as a whole with respect to the frames 36, 37, 38.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Press Drives And Press Lines (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

A flexographic press has at least one printing unit (1, 1', 1") having in each case a printing forme cylinder (2) and a back pressure cylinder (5) for pressing a web (9) to be printed onto the printing forme cylinder (2). In order to be able to undertake infinitely variable changes in the format length, the printing forme cylinder (2) and the back pressure cylinder (5) can each be driven by a separate drive assembly (19, 24). Each drive assembly (19, 24) has its own drive motor (20, 25) said drive motors being linked to each other via a digital synchronisation control (29) so that any desired format lengths and thus any desired diameters of the printing forme cylinder (2) can be selected without the back pressure cylinder (5) having to be exchanged. <IMAGE>

Description

Die Erfindung betrifft eine Flexodruckmaschine, und zwar insbesondere eine Mehrfarben-Flexodruckmaschine, nach dem Oberbegriff des Anspruches 1.The invention relates to a flexographic printing machine, in particular a multicolor flexographic printing machine, according to the preamble of claim 1.

Bei den bekannten Flexodruckmaschinen werden der Ge­gendruckzylinder einerseits und der die zu bedruckende Bahn gegen den Gegendruckzylinder drückende Druckform­zylinder von einem gemeinsamen Antriebsstrang ange­trieben, wobei die beiden Zylinder untereinander über Zahnräder miteinander verbunden sind. Beide Zylinder müssen an der Andrückstelle, also an ihrer Berührungs­stelle, an der der Druckformzylinder gegen die Bahn gedrückt wird, gleiche Umfangsgeschwindigkeit aufwei­sen. Damit dies sichergestellt ist, ist der Durchmes­ser des Druckformzylinders immer identisch dem Teil­kreisdurchmesser des dem Druckformzylinder zugeord­neten Zahnrades. Wenn beliebige Formatlängenänderungen auftreten, dann muß entsprechend der Durchmesser des Druckformzylinders geändert werden, da die Formatlänge gleich der Umfangserstreckung des Druckformzylinders ist. Um trotzdem die geschilderte Schlupffreiheit an der Andrückstelle zwischen Gegendruckzylinder und Druckformzylinder zu erreichen, müssen Druckformzylin­der und Gegendruckzylinder samt den zugehörigen Zahn­rädern ausgewechselt werden. Dies ist aus Kostengrün­den nicht realisierbar. Wenn jeweils der Gegendruck­zylinder unverändert bleiben soll, dann sind Durch­messeränderungen des Druckformzylinders nur entspre­chend der Zahnteilung der den Gegendruckzylinder mit dem Druckformzylinder koppelnden Zahnräder möglich. Wenn beispielsweise die Zahnteilung 5 mm beträgt, dann sind lediglich Formatlängenänderungen in Schritten von 5 mm möglich, d.h. es sind nur Durchmesseränderungen des Druckformzylinders in Schritten von etwa 1,6 mm möglich.In the known flexographic printing presses, the impression cylinder on the one hand and the printing form cylinder pressing the web to be printed against the impression cylinder are driven by a common drive train, the two cylinders being connected to one another via gear wheels. Both cylinders must be at the pressure point, i.e. at their point of contact, at which the printing form cylinder against the web is pressed, have the same peripheral speed. To ensure this, the diameter of the printing form cylinder is always identical to the pitch circle diameter of the gear wheel assigned to the printing form cylinder. If any format length changes occur, then the diameter of the printing form cylinder must be changed accordingly, since the format length is equal to the circumferential extent of the printing form cylinder. In order to achieve the described freedom from slippage at the pressure point between the impression cylinder and the impression cylinder, the impression cylinder and impression cylinder together with the associated gears must be replaced. This is not feasible for cost reasons. If in each case the impression cylinder is to remain unchanged, changes in the diameter of the printing form cylinder are only possible in accordance with the tooth pitch of the gear wheels coupling the impression cylinder with the printing form cylinder. If, for example, the tooth pitch is 5 mm, then only format length changes in steps of 5 mm are possible, ie only diameter changes of the printing form cylinder are possible in steps of approximately 1.6 mm.

Die hohen Qualitätserhöhungen der Flexodrucktechnik ermöglichen Mehrfarbendrucke, die bisher nur im Tief­druckverfahren erreichbar waren. Gerade diese Druck­technik macht aber stufenlose Formatlängenänderungen erforderlich.The high quality increases in flexographic printing technology enable multi-color printing that was previously only possible using gravure printing. However, this printing technology in particular makes continuous format length changes necessary.

Bei Tiefdruckmaschinen werden die Druckwalzen mehrerer hintereinander angeordneter Druckwerke von einem ge­meinsamen Antriebsstrang angetrieben. Die zu bedruk­kende Bahn wird jeweils mittels eines sogenannten Presseurs, einer Andrückwalze, mit hoher Kraft gegen die aus Stahl bestehende Tiefdruckwalze gedrückt. Diese Presseure brauchen nicht angetrieben zu sein. Wegen der Druckempfindlichkeit der Druckformzylinder einer Flexodruckmaschine kommt eine solche Lösung für die gattungsgemäße Maschine nicht in Betracht.In gravure printing machines, the printing rollers of several printing units arranged one behind the other are driven by a common drive train. The web to be printed is pressed with a so-called pressurizer, a pressure roller, with high force against the gravure roller made of steel. These pressers need not be driven. Because of the pressure sensitivity of the printing form cylinders of a flexographic printing machine, such a solution cannot be considered for the generic machine.

Aus der DE-C-34 45 012 ist eine Rollen-Rotations-Fle­xodruckmaschine bekannt, die einen oder mehrere Druck­formzylinder aufweist, denen jeweils zwei Gegendruck­zylinder zugeordnet sind. Jedes hierdurch gebildete Druckwerk weist einen eigenen Antrieb auf. Für die zu bedruckende Bahn ist ein von dem Antrieb des jeweili­gen Druckwerkes völlig unabhängiger Antrieb vorgese­hen. Durch die jeweils einem Druckformzylinder zuge­ordneten Gegendruckzylinder und zusätzliche Leitwalzen für die zu bedruckende Bahn wird es ermöglicht, die Bahn nur jeweils an den Stellen mit dem Druckformzy­linder in Eingriff kommen zu lassen, an denen sich der jeweilige Gegendruckzylinder befindet.From DE-C-34 45 012 a rotary rotary flexographic printing press is known which has one or more printing form cylinders, each of which is assigned two impression cylinders. Each printing unit formed in this way has its own drive. A drive that is completely independent of the drive of the respective printing unit is provided for the web to be printed. The impression cylinders, each associated with a printing form cylinder, and additional guide rollers for the web to be printed, make it possible for the web to come into engagement with the printing form cylinder only at the points at which the respective impression cylinder is located.

Aus der Zeitschrift "PAPIER + KUNSTSTOFF-VERARBEITER 9-86" ist eine Mehrfarben-Flexodruckmaschine bekannt, bei der jedes Druckwerk mit einer eigenen Zuggruppe für die Bahn ausgerüstet ist, die durch den jeweiligen Gegendruckzylinder und einer Anstellwalze gebildet wird. Eine gemeinsamer Antrieb verbindet diese Zug­gruppen über speziell ausgewählte Getriebe.From the magazine "PAPIER + KUNSTSTOFF-VERARBEITER 9-86" a multi-color flexographic printing machine is known, in which each printing unit is equipped with its own train group for the web, which is formed by the respective impression cylinder and a setting roller. A common drive connects these train groups via specially selected gears.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Flexodruckmaschine, und zwar insbesondere eine Mehr­farben-Flexodruckmaschine, der gattungsgemäßen Art so auszugestalten, daß mit einfachen Mitteln eine stufen­lose Anpassung an Formatlängenänderungen möglich ist.The invention is therefore based on the object of designing a flexographic printing machine, in particular a multi-color flexographic printing machine, of the generic type in such a way that a continuous adaptation to changes in format length is possible with simple means.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale im Kennzeichnungsteil des Anspruches 1 gelöst. Durch die erfindungsgemäßen Maßnahmen wird ermöglicht, daß zur Anpassung an Formatlängenänderungen Druckformzy­linder beliebigen Durchmessers eingesetzt werden kön­nen, ohne daß der Gegendruckzylinder und ein gege­benenfalls noch angetriebener Anstellzylinder ausge­tauscht werden müssen. Der Antriebsstrang des Gegen­druckzylinder gibt die Führungsgröße. Bei Änderungen des Durchmessers des Druckformzylinders wird das Dreh­zahlverhältnis des letzterem zugeordneten Antriebs­stranges verändert, so daß letztere jeweils dem An­triebsstrang des oder der Gegendruckzylinder nach­geführt wird. Die Gleichlaufregelung kann über ent­sprechende stufenlos verstellbare Getriebe in min­destens einem Antriebsstrang erfolgen. Besonders ein­fach ist aber die vorteilhafte Weiterbildung nach Anspruch 2.This object is achieved by the features in the characterizing part of claim 1. The measures according to the invention make it possible for printing form cylinders of any diameter to be used to adapt to changes in format length, without the impression cylinder and a possibly still actuating positioning cylinder having to be exchanged. The drive train of the impression cylinder gives the reference variable. When the diameter of the printing form cylinder changes, the speed ratio of the drive train assigned to the latter is changed, so that the latter is in each case tracked to the drive train of the impression cylinder or cylinders. The synchronization control can take place via corresponding continuously variable transmissions in at least one drive train. However, the advantageous further development according to claim 2 is particularly simple.

Einzelheiten der Erfindung ergeben sich aus der nach­folgenden Erläuterung einer Mehrfarben-Flexodruckma­schine anhand der Zeichnung. Es zeigt

  • Fig. 1 eine schematische Seiten-Längs-Ansicht der Fle­xodruckmaschine,
  • Fig. 2 eine Seiten-Längs-Ansicht der Flexodruckmaschi­ne in weniger schematischer, sondern mehr kon­struktiver Darstellung und
  • Fig. 3 einen Teil-Querschnitt durch ein Druckwerk ge­mäß der Schnittlinie III-III in Fig. 2.
Details of the invention result from the following explanation of a multi-color flexographic printing machine with reference to the drawing. It shows
  • 1 is a schematic longitudinal side view of the flexographic printing machine,
  • Fig. 2 is a longitudinal side view of the flexographic printing machine in a less schematic, but more constructive representation and
  • 3 shows a partial cross section through a printing unit according to section line III-III in FIG. 2.

Die in der Zeichnung dargestellte Mehrfarben-Flexo­druckmaschine weist mehrere grundsätzlich identische Druckwerke 1, 1′, 1˝ auf. Jedes Druckwerk weist einen Druckformzylinder 2 auf, an dem die Druckform ange­bracht ist. Der Druckformzylinder 2 liegt gegen einen Rasterzylinder 3 an, mittels dessen aus einem Farbbe­hälter 4 Farbe auf den Druckformzylinder 2 übertragen wird. Der Druckformzylinder 2 liegt weiterhin gegen einen Gegendruckzylinder 5 an gegen den wiederum ein im Durchmesser beispielsweise gleicher Anstellzylinder 6 anliegt. Der Gegendruckzylinder 5 und der Rasterzy­linder 3 sind antriebsmäßig miteinander gekoppelt.The multi-color flexographic printing machine shown in the drawing has several basically identical printing units 1, 1 ', 1˝. Each printing unit has a printing form cylinder 2 to which the printing form is attached. The printing form cylinder 2 bears against a raster cylinder 3, by means of which 4 color is transferred to the printing form cylinder 2 from an ink container. The printing form cylinder 2 is also in contact with an impression cylinder 5, against which in turn a contact cylinder 6, for example of the same diameter, bears. The impression cylinder 5 and the raster cylinder 3 are coupled to one another in terms of drive.

Dem ersten Druckwerk 1 ist eine sogenannte Bahn-Ein­laufzuggruppe 7 vorgeordnet, von der eine in Form einer Rolle 8 vorliegende Bahn von zu bedruckendem Material, beispielsweise Papier, Kunststoffolie, Me­tallfolie, metall-kaschierte Papierbahn oder der­gleichen abgezogen wird. Diese Bahn 9 wird über eine Umlenkrolle 10 und eine Tänzerwalze 11 zu einem Abzug­rollenpaar 12 geführt, das aus einer mittels eines Mo­tors 13 angetriebenen Transportrolle 14 und einer die Bahn 9 gegen die Transportrolle 14 drückenden und so einen Transport sicherstellenden Gegendruckrolle 15 besteht. Von dem Abzugrollenpaar 12 wird die Bahn 9 zum ersten Druckwerk 1 geführt, wo sie um den An­stellzylinder 6 herum und zwischen dem Anstellzylinder 6 und dem Gegendruckzylinder 5 hindurch um letzteren herumgeführt wird. Vom Gegendruckzylinder 5 wird sie gegen den Druckformzylinder 2 gedrückt, wobei beim entsprechenden Umlauf des Druckformzylinders 2 und des Gegendruckzylinders 5 das auf dem Druckformzylinder 2 befindliche Bild auf die Bahn 9 übertragen wird.The first printing unit 1 is preceded by a so-called web inlet train group 7, from which a web in the form of a roll 8 of material to be printed, for example paper, plastic film, metal foil, metal-laminated paper web or the like, is drawn off. This web 9 is guided via a deflection roller 10 and a dancer roller 11 to a pair of take-off rollers 12 which consist of a transport roller 14 driven by a motor 13 and a counterpressure roller 15 pressing the web 9 against the transport roller 14 and thus ensuring transport consists. From the pair of take-off rollers 12, the web 9 is guided to the first printing unit 1, where it is guided around the positioning cylinder 6 and between the positioning cylinder 6 and the impression cylinder 5 around the latter. It is pressed by the impression cylinder 5 against the printing form cylinder 2, the image on the printing form cylinder 2 being transferred to the web 9 when the printing form cylinder 2 and the impression cylinder 5 are rotated accordingly.

Von dem Gegendruckzylinder 5 des Druckwerkes 1 läuft die Bahn 9 dann über einen Registerzylinder 16 zum zweiten Druckwerk 1′ durch das die Bahn 9 in gleicher Weise geführt wird. Der Registerzylinder 16 dient dazu, die zwischen zwei benachbarten Druckwerken 1, 1′ befindliche Bahnlänge so einzustellen, daß ein passer­gerechter Druck in den aufeinanderfolgenden Druckwer­ken 1, 1′ erfolgt. Von dort läuft sie wiederum über einen Registerzylinder 16 zum nächsten Druckwerk 1˝, durch das sie ebenfalls in gleicher Weise geführt wird. Dies wird so oft fortgesetzt, wie Druckwerke vorhanden sind. Vom letzten Druckwerk 1˝ wird die Bahn 9 zu einer Bahn-Auslaufzuggruppe 17 geführt. Diese Bahn-Auslaufzugruppe 17 entspricht in ihrem Aufbau der Bahn-Einlaufzuggruppe 7. Sie weist also wiederum eine Umlenkrolle 10′ mit nachgeordneter Tän­zerwalze 11′ und ein Abzugrollenpaar 12′ auf, das aus einer von einem Motor 13′ angetriebenen Transportrolle 14′ mit Gegendruckrolle 15′ besteht. Von dort wird die Bahn 9 zu einer Aufwickelstation 18 geführt.From the impression cylinder 5 of the printing unit 1, the web 9 then runs via a register cylinder 16 to the second printing unit 1 'through which the web 9 is guided in the same way. The register cylinder 16 is used to adjust the web length between two adjacent printing units 1, 1 'so that a register-correct printing takes place in the successive printing units 1, 1'. From there it runs again via a register cylinder 16 to the next printing unit 1˝, through which it is also guided in the same way. This continues as often as there are printing units. From the last printing unit 1˝, the web 9 is guided to a web discharge train group 17. This Bahn-Auslaufzugruppe 17 corresponds in its structure to the Bahn-Einlaufzuggruppe 7. It therefore again has a deflection roller 10 'with a downstream dancer roller 11' and a pair of take-off rollers 12 ', which from a motor 13' driven transport roller 14 'with counter-pressure roller 15th ' consists. From there, the web 9 is guided to a winding station 18.

Zum Antrieb aller Druckformzylinder 2 und aller Druck­werke 1, 1′, 1˝ dient ein einziger Antriebsstrang 19, der aus einem elektrischen Antriebsmotor 20 und mehre­ren diesem in Reihe nachgeordneten Untersetzungs- und Umlenkgetrieben 21 besteht, die über Antriebswellen 22 miteinander verbunden sind, so daß alle Getriebe 21 in gleicher Weise angetrieben werden. Jedes Getriebe 21 ist jeweils über eine Abtriebswelle 23 mit dem Druck­formzylinder 2 eines Druckwerkes 1 oder 1′ oder 1˝ antriebsmäßig verbunden. Die jeweilige Abtriebswelle 23 ist dementsprechend gleichzeitig Antriebswelle des entsprechenden Druckformzylinders 2.To drive all printing form cylinder 2 and all printing units 1, 1 ', 1˝ is used a single drive train 19, which consists of an electric drive motor 20 and several this in series downstream reduction and deflection gear 21, which are connected via drive shafts 22 so that all gears 21 are driven in the same way. Each transmission 21 is connected via an output shaft 23 with the printing form cylinder 2 of a printing unit 1 or 1 'or 1˝ drive. The respective output shaft 23 is accordingly at the same time the drive shaft of the corresponding printing form cylinder 2.

Alle Gegendruckzylinder 5 sind über einen zweiten An­triebsstrang 24 angetrieben, der ebenfalls einen An­triebsmotor 25 und diesem nachgeordnet Untersetzungs- und Umlenkgetriebe 26 aufweist. Sie sind untereinander in Reihe geschaltet und über Antriebswellen 27 mitein­ander verbunden. Aus jedem Getriebe 26 ist jeweils eine Abtriebswelle 28 zu dem entsprechenden Gegen­druckzylinder 5 eines Druckwerkes 1 oder 1′ oder 1˝ geführt, zu dessen Antrieb sie dient. Der Druckformzy­linder 2 einerseits und der Gegendruckzylinder 5 an­dererseits eines jedes Druckwerkes 1 oder 1′ oder 1˝ werden also von einem gesonderten Antriebsstrang 19 bzw. 24 angetrieben.All impression cylinders 5 are driven by a second drive train 24, which likewise has a drive motor 25 and a reduction and deflection gear 26 arranged downstream thereof. They are connected in series with one another and connected to one another via drive shafts 27. From each gear 26, an output shaft 28 is guided to the corresponding impression cylinder 5 of a printing unit 1 or 1 'or 1', for the drive it serves. The printing form cylinder 2 on the one hand and the impression cylinder 5 on the other hand of each printing unit 1 or 1 'or 1' are driven by a separate drive train 19 or 24.

Die beiden Antriebsmotoren 20 und 25 sind über eine digitale Gleichlaufregelung 29 miteinander gekoppelt, wobei der die Gegendruckzylinder 5 antreibende An­triebsstrang 24 die Führungsgröße abgibt. Hierzu ist der Antriebsmotor 25 mit einem üblichen mit der Motorwelle gekoppelten Drehimpulsgeber 30 versehen, der pro Umdrehung der Welle des Antriebsmotors 25 eine vorgebene Zahl von Impulsen abgibt. Diese werden einer Regeleinrichtung 31 zugeführt, wo sie in Steuerimpulse für den Antriebsmotor 20 umgewandelt werden. Dieser ist ebenfalls mit einem Drehimpulsgeber 32 versehen, der mittels seiner entsprechenden Impulse eine Ist-Drehzahlrückmeldung an die Regeleinrichtung 31 gibt.The two drive motors 20 and 25 are coupled to one another via a digital synchronous control 29, the drive train 24 driving the counter-pressure cylinders 5 providing the reference variable. For this purpose, the drive motor 25 with a conventional one with the Provided motor shaft coupled rotary pulse generator 30, which emits a predetermined number of pulses per revolution of the shaft of the drive motor 25. These are fed to a control device 31, where they are converted into control pulses for the drive motor 20. This is also provided with a rotary pulse generator 32, which uses its corresponding pulses to give an actual speed feedback to the control device 31.

Mit der geschilderten digitalen Gleichlaufregelung 29 kann sichergestellt werden, daß der Antriebsmotor 20 ganz exakt eine Drehzahl einhält, die in einem festen über die Regeleinrichtung 31 vorgebbaren Verhältnis zur Drehzahl des Antriebsmotors 25 steht. Auf diese Weise können die Antriebsdrehzahlen aller Gegendruck­zylinder 5 einerseits und aller Druckformzylinder 2 andererseits exakt in einem vorgegebenen Verhältnis zueinander stehen, das derart gewählt ist, daß die Um­fangsgeschwindigkeiten der Druckformzylinder 2 und der Gegendruckzylinder 5 andererseits jeweils identisch sind, so daß an der jeweiligen Andrückstelle 33, in der die Bahn 9 vom jeweiligen Gegendruckzylinder 5 gegen den jeweiligen Druckformzylinder 2 gedrückt wird, keinerlei Schlupf auftritt.With the described digital synchronous control 29 it can be ensured that the drive motor 20 adheres exactly to a speed which is in a fixed relationship to the speed of the drive motor 25 which can be predetermined via the control device 31. In this way, the drive speeds of all impression cylinders 5, on the one hand, and all printing form cylinders 2, on the other hand, are exactly in a predetermined relationship to one another, which is selected such that the peripheral speeds of the printing form cylinders 2 and the impression cylinder 5, on the other hand, are each identical, so that at the respective pressing point 33 , in which the web 9 is pressed by the respective impression cylinder 5 against the respective printing form cylinder 2, no slip occurs.

Wenn das auf die Bahn 9 zu druckende Format geändert wird, d.h. wenn der Umfang des Druckformzylinders 2 der gleich der Formatlänge ist, geändert wird, dann braucht der Gegendruckzylinder 5 nicht ausgewechselt zu werden.If the format to be printed on the web 9 is changed, ie if the circumference of the printing form cylinder 2 which is equal to the format length is changed, then the impression cylinder 5 does not need to be replaced.

Digitale Gleichlaufregelungen 29 sind handelsüblich. Sie werden beispielsweise von der Firma Siemens AG, München, Bundesrepublik Deutschland, hergestellt und unter der Bezeichnung "Digitalregler A8.302 (A8.301) für Drehzahl-, Positions- und Gleichlaufregelungen" vertrieben.Digital synchronization controls 29 are commercially available. They are manufactured, for example, by Siemens AG, Munich, Federal Republic of Germany, and sold under the name "digital controller A8.302 (A8.301) for speed, position and synchronous control".

Wie sich aus dem Vorstehenden ergibt, brauchen die Ge­triebe 21 und 26 andererseits nicht als stufenlos ein­stellbare Regelgetriebe ausgebildet zu sein. Sie kön­nen vielmehr ein festes Untersetzungsverhältnis haben, da die gesamte Anpassung an unterschiedliche Drehzahl­verhältnisse zwischen Druckformzylindern 2 einerseits und Gegendruckzylindern 5 andererseits über die Regel­einrichtung 31 der Gleichlaufregelung 29 durchgeführt werden kann.As can be seen from the foregoing, on the other hand, the gearboxes 21 and 26 need not be designed as a continuously variable control gearbox. Rather, they can have a fixed reduction ratio, since the entire adaptation to different speed ratios between printing form cylinders 2 on the one hand and counter-pressure cylinders 5 on the other hand can be carried out via the control device 31 of the synchronous control 29.

In Fig. 2 und 3 ist die in Fig. 1 nur schematisch dar­gestellt Mehrfarben-Flexodruckmaschine in einer Sei­ten-Längs-Ansicht und einer Teil-Schnittdarstellung dargestellt. Da die Darstellungen grundsätzlich über­einstimmen, werden in den Fig. 2 und 3 für gleiche Teile identische Bezugsziffern verwendet, denen le­diglich ein "a" hinzugefügt ist. Eine neue Beschrei­bung ist insoweit in der Regel nicht erforderlich. Aus Gründen der Übersichtlichkeit sind in Fig. 2 die Antriebsstränge 19, 24 nicht dargestellt.2 and 3, the multicolor flexographic printing machine shown only schematically in FIG. 1 is shown in a longitudinal side view and a partial sectional view. 2 and 3, identical reference numerals are used for the same parts, to which only an "a" is added. In this respect, a new description is usually not necessary. For reasons of clarity, the drive trains 19, 24 are not shown in FIG. 2.

Wie Fig. 2 entnehmbar ist, sind die Rolle 8a und die Bahn-Einlaufgruppe 7a auf einem gemeinsamen Gestell 34 untergebracht. In gleicher Weise sind die Bahn-Aus­laufzugruppe 17a und die Aufwickelstation 18a auf einem Gestell 35 gelagert. Jedes Druckwerk 1a, 1′a und 1˝a ist in einem eigenen Gestell 36, 37, 38, unterge­bracht. Alle sind in Arbeitsrichtung 39 hintereinander angeordnet. Jedem Druckwerk 1a, 1′a, 1˝a ist ein Trockner 40 nachgeordnet, durch das die Bahn 9a ge­führt wird, um das Lösungsmittel der Druckfarbe zu verdunsten. Dem jeweiligen Trockner 40 ist dann noch ein Kühlzylinder 41 nachgeordnet, über den die im Trockner 40 erwärmte Bahn 9a geführt wird.As can be seen in FIG. 2, the roller 8a and the web inlet group 7a are accommodated on a common frame 34. In the same way, the web outlet train group 17a and the winding station 18a are open a frame 35 stored. Each printing unit 1a, 1'a and 1˝a is housed in its own frame 36, 37, 38. All are arranged one behind the other in the working direction 39. Each printing unit 1a, 1'a, 1˝a is followed by a dryer 40 through which the web 9a is guided in order to evaporate the solvent of the printing ink. The respective dryer 40 is then followed by a cooling cylinder 41, over which the web 9a heated in the dryer 40 is guided.

Wie Fig. 3 erkennen läßt, sind die Zylinder eines Druckwerkes 1′a - und aller insoweit identischen Druckwerke 1a und 1˝a - in einander gegenüberliegen­den Gestell-Wänden 42, 43 gelagert. Die Lager 44 des Druckformzylinders 2a sind in Schlitten 45 angeordnet, die in entsprechenden Führungen 46 in den Gestell-Wän­den 42, 43 vertikal verschiebbar sind. Sie können mit­tels eines Zustellantriebes 47, beispielsweise in Form eines Handkurbelrades, über Umlenkgetriebe 48 und Spindeln 49 parallel zueinander verschoben werden, wo­durch der Druckformzylinder 2a gegen den Gegendruckzy­linder 5a zugestellt bzw. von diesem abgehoben wird. Damit diese Zustellung möglich ist, ist die Abtriebs­welle 23a als Gelenkwelle ausgebildet. Hierzu ist sie einerseits mit einem Abtriebszapfen 51 des Getriebes 21a und andererseits mit einem Wellenzapfen 52 des Druckformzylinders 2a jeweils über eine Gelenkkupplung 53 bzw. 54 verbunden ist.As can be seen in FIG. 3, the cylinders of a printing unit 1'a - and all printing units 1a and 1˝a which are identical in this respect - are mounted in opposing frame walls 42, 43. The bearings 44 of the printing form cylinder 2a are arranged in carriages 45 which are vertically displaceable in corresponding guides 46 in the frame walls 42, 43. They can be displaced parallel to one another by means of an infeed drive 47, for example in the form of a hand crank wheel, via deflecting gear 48 and spindles 49, as a result of which the printing form cylinder 2a is fed against the impression cylinder 5a or is lifted off the latter. In order for this infeed to be possible, the output shaft 23a is designed as a cardan shaft. For this purpose, it is connected on the one hand to an output pin 51 of the transmission 21a and, on the other hand, to a shaft pin 52 of the printing form cylinder 2a, each via an articulated coupling 53 or 54.

In Fig. 3 ist auf der Abtriebswelle 28a für den Gegen­druckzylinder 5a ein Antriebszahnrad 55 drehfest ange­bracht, über das der in Fig. 3 nicht erkennbare Ra­ sterzylinder 3a angetrieben wird. Außerdem ist in die Abtriebswelle 28a eine schwingungsdämpfende Kupplung 56 geschaltet.In Fig. 3, a drive gear 55 is rotatably mounted on the output shaft 28a for the impression cylinder 5a, via which the Ra not recognizable in Fig. 3 Ster cylinder 3a is driven. In addition, a vibration-damping clutch 56 is connected in the output shaft 28a.

Die Getriebe 21a und 26a sind aufeinander angeordnet und stützen sich über einen Haltearm 57 gegenüber einer Gestell-Wand 43 ab. Damit sind auch die An­triebsstränge 19a und 24a gegenüber den Gestellen 36, 37, 38 insgesamt abgestützt und festgelegt.The gears 21a and 26a are arranged one on top of the other and are supported by a holding arm 57 against a frame wall 43. The drive trains 19a and 24a are thus also supported and fixed as a whole with respect to the frames 36, 37, 38.

Claims (4)

1. Flexodruckmaschine, insbesondere Mehrfarben-Flexo­druckmaschine, mit mindestens einem Druckwerk (1, 1′, 1˝; 1a, 1′a, 1˝a), das jeweils einen antreibbaren Druckformzylinder (2; 2a) und einen eine zu bedrucken­de Bahn (9; 9a) gegen den Druckformzylinder (2; 2a) andrückenden, antreibbaren Gegendruckzylinder (5; 5a) aufweist, wobei der Druckformzylinder (2; 2a) und der Gegendruckzylinder (5; 5a) mit gleicher Umfangsge­schwindigkeit antreibbar sind, dadurch gekennzeichnet, daß der Druckformzylinder (2; 2a) und der Gegendruck­zylinder (5; 5a) jeweils von einem gesonderten An­triebsstrang (19, 24; 19a, 24a) mit jeweils einem Antriebsmotor (20, 25) antreibbar sind und daß die Antriebsstränge (19, 24; 19a, 24a) mit einer Gleich­laufregelung (29) mit einem stufenlos einstellbaren Drehzahlverhältnis zwischen den Antriebssträngen (19, 24; 19a, 24a) miteinander verknüpft sind.1. Flexographic printing machine, in particular multi-color flexographic printing machine, with at least one printing unit (1, 1 ', 1˝; 1a, 1'a, 1˝a), each of which has a drivable printing form cylinder (2; 2a) and a web to be printed ( 9; 9a) against the printing form cylinder (2; 2a), the drivable impression cylinder (5; 5a), the printing form cylinder (2; 2a) and the impression cylinder (5; 5a) being drivable with the same peripheral speed, characterized in that the Printing form cylinder (2; 2a) and the impression cylinder (5; 5a) can each be driven by a separate drive train (19, 24; 19a, 24a) with one drive motor (20, 25) each and that the drive trains (19, 24; 19a, 24a) with a synchronous control (29) with an infinitely adjustable speed ratio between the drive trains (19, 24; 19a, 24a). 2. Flexodruckmaschine nach Anspruch 1, dadurch gekenn­zeichnet, daß die Antriebsmotoren (20, 25) über die Gleichlaufregelung (29) miteinander verknüpft sind.2. Flexographic printing machine according to claim 1, characterized in that the drive motors (20, 25) via the synchronous control (29) are linked together. 3. Flexodruckmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß eine digitale Gleichlaufregelung (29) vorgesehen ist.3. Flexographic printing machine according to claim 1 or 2, characterized in that a digital synchronous control (29) is provided. 4. Flexodruckmaschine nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß dem jeweiligen Druck­werk (1, 1′, 1˝; 1a, 1′a, 1˝a) ein im jeweiligen Antriebsstrang (19, 24; 19a, 24a) angeordnetes Unter­setzungs-Getriebe (21, 26; 21a, 26a) vorgeordnet ist.4. Flexographic printing machine according to one of claims 1 to 3, characterized in that the respective printing unit (1, 1 ', 1˝; 1a, 1'a, 1˝a) in the respective drive train (19, 24; 19a, 24a) arranged reduction gear (21, 26; 21a, 26a) is arranged upstream.
EP89111563A 1988-07-28 1989-06-24 Flexographic press Expired - Lifetime EP0352483B1 (en)

Applications Claiming Priority (2)

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DE3825652 1988-07-28
DE3825652A DE3825652A1 (en) 1988-07-28 1988-07-28 FLEXO PRINTING MACHINE

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EP0352483A2 true EP0352483A2 (en) 1990-01-31
EP0352483A3 EP0352483A3 (en) 1991-01-02
EP0352483B1 EP0352483B1 (en) 1994-11-09

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FR2759629A1 (en) * 1997-02-18 1998-08-21 Christian Rebeyrol FLEXOGRAPHIC PRINTING MACHINE
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CN100393510C (en) * 2005-03-15 2008-06-11 东莞东运机械制造有限公司 Intaglio proofing press
CN100393511C (en) * 2005-03-15 2008-06-11 东莞东运机械制造有限公司 Gravure proof press
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EP2042315A3 (en) * 2007-09-25 2011-07-20 Gallus Druckmaschinen GmbH Printing unit and printing press
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EP0672525A1 (en) * 1994-03-14 1995-09-20 A.V. Flexologic B.V. Apparatus for printing proofs
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US5485782A (en) * 1994-03-14 1996-01-23 Av Flexologic B.V. Apparatus for printing proofs
FR2735067A1 (en) * 1995-06-07 1996-12-13 Komori Chambon ROTARY PRINTING MACHINE WITH VARIABLE FORMAT, ESPECIALLY OF THE FLEXOGRAPHIC TYPE.
WO1996040521A1 (en) * 1995-06-07 1996-12-19 Komori-Chambon S.A. Variable format rotary printing machine, particularly of the flexographic type
EP0788879A1 (en) 1996-02-09 1997-08-13 Bobst S.A. Rotary printing press
US5771805A (en) * 1996-02-09 1998-06-30 Bobat Sa Rotating printing machine
FR2759629A1 (en) * 1997-02-18 1998-08-21 Christian Rebeyrol FLEXOGRAPHIC PRINTING MACHINE
WO1998036909A1 (en) * 1997-02-18 1998-08-27 Saint-Eloi Mecanique Outillage Flexographic printing machine
EP1494859A4 (en) * 2002-03-27 2006-05-17 Joseph B Schutte Iii Combined flexographic and intaglio printing press and operating system therefor
EP1494859A1 (en) * 2002-03-27 2005-01-12 Schutte, Joseph B., III Combined flexographic and intaglio printing press and operating system therefor
US7542175B2 (en) 2002-03-27 2009-06-02 Sekuworks, Llc Combined flexographic and intaglio printing press and operating system therefor
US7916355B2 (en) 2002-03-27 2011-03-29 Sekuworks, Llc Combined flexographic and intaglio printing press and operating system therefor
CN100393510C (en) * 2005-03-15 2008-06-11 东莞东运机械制造有限公司 Intaglio proofing press
CN100393511C (en) * 2005-03-15 2008-06-11 东莞东运机械制造有限公司 Gravure proof press
EP2042315A3 (en) * 2007-09-25 2011-07-20 Gallus Druckmaschinen GmbH Printing unit and printing press
US8505450B2 (en) 2007-09-25 2013-08-13 Gallus Druckmaschinen Gmbh Printing unit, printing press and method of producing labels or self-adhesive labels in a printing press
EP2103429A1 (en) 2008-03-10 2009-09-23 Gallus Druckmaschinen GmbH Printing unit and press with format change
US8499691B2 (en) 2008-03-10 2013-08-06 Gallus Druckmaschinen Gmbh Printing unit, printing press and process for producing labels in a printing press
CZ304919B6 (en) * 2013-06-17 2015-01-21 Soma Spol. S R.O. Arrangement of flexographic printing machine with central counter-pressure cylinder

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DE58908621D1 (en) 1994-12-15
ES2065947T3 (en) 1995-03-01
DE3825652A1 (en) 1990-02-01
EP0352483B1 (en) 1994-11-09
JPH0286445A (en) 1990-03-27
EP0352483A3 (en) 1991-01-02

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