EP1097813A2 - Sheet-fed rotary printing press with printing units for multicolour printing and at least one coating unit - Google Patents

Sheet-fed rotary printing press with printing units for multicolour printing and at least one coating unit Download PDF

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Publication number
EP1097813A2
EP1097813A2 EP00118343A EP00118343A EP1097813A2 EP 1097813 A2 EP1097813 A2 EP 1097813A2 EP 00118343 A EP00118343 A EP 00118343A EP 00118343 A EP00118343 A EP 00118343A EP 1097813 A2 EP1097813 A2 EP 1097813A2
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EP
European Patent Office
Prior art keywords
sheet
printing
cleaning
roller
coating
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
EP00118343A
Other languages
German (de)
French (fr)
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EP1097813A3 (en
EP1097813B1 (en
Inventor
Jürgen Schölzig
Uwe Püschel
Ulrich Dr. Jung
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.)
Manroland AG
Original Assignee
MAN Roland Druckmaschinen AG
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Publication date
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP1097813A2 publication Critical patent/EP1097813A2/en
Publication of EP1097813A3 publication Critical patent/EP1097813A3/en
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Publication of EP1097813B1 publication Critical patent/EP1097813B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/08—Print finishing devices, e.g. for glossing prints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F35/00—Cleaning arrangements or devices
    • B41F35/04—Cleaning arrangements or devices for inking rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2235/00—Cleaning
    • B41P2235/10—Cleaning characterised by the methods or devices
    • B41P2235/14—Cleaning characterised by the methods or devices using ultrasonic energy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2235/00—Cleaning
    • B41P2235/10—Cleaning characterised by the methods or devices
    • B41P2235/20—Wiping devices
    • B41P2235/21—Scrapers, e.g. absorbent pads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2235/00—Cleaning
    • B41P2235/10—Cleaning characterised by the methods or devices
    • B41P2235/26—Spraying devices

Definitions

  • the invention relates to a sheet-fed rotary printing press Printing units for multi-color printing and at least one Coating unit according to the preamble of the main claim.
  • a rotary printing press of this type is known from EP 0620 115 B1 known.
  • For inline coating of sheet-shaped substrates are at least two painting units as coating units intended.
  • the one upstream in the direction of sheet travel The coating unit is a flexographic printing unit with one a high pressure mold and with the bow leading Impression cylinder in contact with forme cylinder, one with the form cylinder in contact with the rastered application roller for inking (coating) and an adjustable chamber doctor blade, with a feed pump for coating liquid supply and a suction pump for coating liquid return is connected, trained.
  • DE 195 26 574 C1 describes a method and a device for cleaning one forme cylinder (with printing form) and one Applicator roller known, causing the drying of quick-drying Media on the application roller and on the forme cylinder is reduced.
  • the washing device has two curved ones Areas that the application roller and the form cylinder are facing.
  • a chambered doctor blade as a metering system is known from US 5,121,689. Here is the working squeegee with an ultrasonic device coupled to the layer thickness of the printing ink the metering roller.
  • DE 41 21 017 C2 discloses a washing device with a soft, smooth rubber-coated roller and an associated Scraper roller with a polygonal cross section. To the Removing ink from the stripper roller jacket an ultrasonic cleaning device is provided.
  • the invention is based on the object of a sheet-fed rotary printing press to create the type described at the beginning, which avoids the disadvantages mentioned, in particular a stable quality allowed during the coating process and noticeably reduces contamination of coating fluid.
  • a first advantage is that in a dosing system, preferably formed from a chambered doctor blade and an associated one screened application roller, the application roller continuously or can be cleaned intermittently of dirt.
  • Applicator roller instead of a grid (cell and bars) Applicator roller also an applicator roller with a smooth surface can be used within a dosing system.
  • color cleavages (Flexographic and / or offset printing ink from the previous one Printing process) from the substrate to the dosing system in particular the first coating unit can be avoided.
  • This Color cleavages result from the printing process in the Direction of delivery upstream printing units.
  • a chambered doctor blade with a raster Roller build-up of paint residue inside of the chambered doctor blade and / or the application roller and thus possible Mixing with the coating fluid can be avoided.
  • two-roll mills (according to the squeeze roll principle with a jointly formed nip) are accumulations of paint residues in the metering roller and applicator roller formed nip and / or the applicator roll avoidable.
  • Another advantage is that the number of Cleaning intervals for the respective dosing system with Application roller are reducible.
  • a printing press is provided with a plurality of printing units 12 for the Multi-color printing, preferably offset printing units, in series formed, the arcuate in the conveying direction 5 Substrates a first coating device 13 and a second coating device 14 for the printing units 12 are subordinate. Between the coating facilities 13, 14, a dryer unit 15 is preferably arranged. The second coating device 14 is a boom 19 subordinate, among other things by circulating conveyor systems 21 is formed, the sheets on a delivery stack 22nd lay down. The invention is also in the case of multiple arrangements Coating devices 13, 14 can be used.
  • a printing unit 12 essentially consists of a plate cylinder 16, a blanket cylinder 17 and a sheet guide cylinder 1, here a pressure cylinder.
  • the plate cylinder 16 is assigned an inking unit and, if appropriate, is a dampening unit adjacent to the plate cylinder 16 assigned, which will not be discussed in more detail here.
  • each one Sheet guide cylinder 18 as a transfer cylinder for transport the sheet-shaped substrates.
  • the sheet guide cylinders 1, 18 are based on a single size Blanket cylinder 17 and forme cylinder 2 are double-sized.
  • the first coating device 13 is a coating unit for Example of processing dispersion varnish with pigments on an aqueous basis, formed and consists of a sheet guide cylinder 1 (impression cylinder), one with the sheet guide cylinder 1 contactable forme cylinder 2, the a flexible high-pressure plate as a lacquer form, and one first dosing system 20.
  • the first dosing system 20 is through a gridable which can be brought into contact with the forme cylinder 2
  • Application roller 3 (provided with a cup and webs) and a with this applicator roller 3 in functional connection Chamber squeegee 4 formed.
  • the second coating device 14 is also as Coating unit, for example for processing dispersion lacquer on an aqueous basis, trained and in turn consists of a sheet guide cylinder 1 (impression cylinder), one with the Sheet guiding cylinder 1, contactable form cylinder 2, which carries a rubber blanket and a second metering system 20.
  • the second metering system 20 is through one with the forme cylinder 2 contactable applicator roller 3 with preferred smooth surface and a metering roller 23 with common Roll nip formed.
  • Each dosing system 20 has a line system Feed line 10 and return line 11 for the circulation of a liquid coating medium or a cleaning fluid on.
  • the supply lines 10 and the return lines open 11 inside the dosing systems 20. With a chambered doctor blade 4, this is the chamber, which with the applicator roller 3 in Functional connection is.
  • the feed line 10 opens above the jointly formed nip and the return line 11 is discharged at the front of the nip.
  • each Application roller 3 and each forme cylinder 2 there is between each Application roller 3 and each forme cylinder 2 formed a gap 6.
  • the application rollers 3 and the forme cylinder 2 are on or parkable.
  • the coating units arranged downstream of the printing units 12 13, 14 each have one of the corresponding applicator rollers 3 assignable and disengageable and across the roller width extending cleaning doctor system 8, which between your gap 6 (contact point of forme cylinder 2 and Applicator roller 3) in the direction of rotation 7 of the corresponding applicator roller 3 to the respective metering system 20 (doctor blade 4, metering roller 23) is upstream.
  • the cleaning doctor system 8 preferably has one each with the applicator roller 3 in functional connection standing closing squeegee and a working squeegee. Closing and working squeegees are on one forming the chamber Housing, which has lateral sealing elements, detachable arranged.
  • the cleaning doctor system 8 preferably has an ultrasonic oscillation system 9, whose vibrations are immediate are directed onto the roller surface of the applicator roller 3.
  • the ultrasonic vibration system 9 is preferably on the housing of the Cleaning squeegee system 8 fixed. Furthermore, the cleaning squeegee system 8 with one opening into the interior of the chamber or laxative feed system 24 or a return system 25 for the circulation of a cleaning fluid, e.g. Water, coupled on the line side.
  • the circulation is controllable Pump system operated.
  • the ultrasonic vibration system 9 can be switched on or off during the coating process (dosing system 20 is active) and is connected in terms of circuitry to a machine control.
  • the cleaning squeegee system 8 can be turned on or off during the coating process for the application roller 3, for example by means of a swivel joint and working cylinder. In the employed state, a cleaning fluid can be introduced via the feed system 24 and the return system 25. If necessary, the ultrasonic vibration system 9 can then be activated.
  • the cleaning doctor system 8 with doctor blades and feed and return system 24, 25 can preferably be used.
  • the above-mentioned cleaning system 8 with an additional ultrasonic vibration system 9 is preferably used.
  • the cleaning doctor system 8 opposite the metering system 20, here the chambered doctor blade 4, assigned to the application roller 3 and has a closing and a working squeegee.
  • the cleaning doctor system 8 is in the metering system 20, here in the doctor blade 4, integrated, but in the direction of rotation 7 upstream of the doctor blade 4. Is an advantage here that only a doctor blade for separating the Chambers of chamber doctor 4 and cleaning doctor system 8 required is saved and thus another doctor blade becomes.
  • FIG. 4 the cleaning doctor system 8 is again with Squeegee and working squeegee formed, but on the same Side like the doctor blade 4 to the applicator roller 3 and in Direction of rotation 7 arranged in front of this.
  • Chamber doctor 4 directly to the cleaning doctor system 8.
  • 5 shows a spatial separation of the chamber doctor blade 4 and cleaning squeegee system 8, which on the same Side to the applicator roller 3 are arranged.
  • a color cleavage occurs during the coating process on the application roller 3 (possibly in the metering system 20) in the first or second coating unit 13, 14 or possibly further coating units, so is the respective one Cleaning squeegee system 8 can be activated.
  • This by means of a feed system 24 and return system 25 circulating cleaning fluid is with brought into contact with the surface of the application roller 3, the Color is loosened and removed.
  • Ultrasonic vibration system 9 for additional support of the Activating cleaning effect.
  • the cleaning process is can be carried out continuously or discontinuously.
  • a blowing device e.g. on across the roll width extending blow tube, for drying the applicator roller 3 be arranged by blowing.
  • the cleaning doctor system 8 can Inside at least one that supports the cleaning effect Have a cleaning brush.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)
  • Coating Apparatus (AREA)
  • Electronic Switches (AREA)

Abstract

The press has at least one coating unit. Each coating unit has a sheet guide cylinder, a form cylinder and a dosing system with application roll (3). Each coating unit (13, 14), fitted after the printers (12) in the feed direction, has a cleaning doctor system which can be pressed against and withdrawn from the application roll. This system is fitted in front of the dosing system in the turning direction of the roll.

Description

Die Erfindung betrifft eine Bogenrotationsdruckmaschine mit Druckeinheiten für den Mehrfarbendruck und wenigstens einer Beschichtungseinheit nach dem Oberbegriff des Hauptanspruches.The invention relates to a sheet-fed rotary printing press Printing units for multi-color printing and at least one Coating unit according to the preamble of the main claim.

[Stand der Technik][State of the art]

Eine Rotationsdruckmaschine dieser Art ist aus EP 0620 115 B1 bekannt. Zum Inline-Beschichten von bogenförmigen Bedruckstoffen sind wenigstens zwei Lackiereinheiten als Beschichtungseinheiten vorgesehen. Die in Bogenlaufrichtung vorgeordnete Lackiereinheit ist dabei als Flexodruckwerk mit einem eine Hochdruckform tragenden und mit dem bogenführenden Druckzylinder in Kontakt stehenden Formzylinder, einer mit dem Formzylinder in Kontakt stehenden gerasterten Auftragwalze zum Einfärben (Beschichten) und einem anstellbaren Kammerrakel, das mit einer Förderpumpe zur Beschichtigungsflüssigkeitszufuhr und einer Saugpumpe zur Beschichtigungsflüssigkeitsrückführung verbunden ist, ausgebildet.A rotary printing press of this type is known from EP 0620 115 B1 known. For inline coating of sheet-shaped substrates are at least two painting units as coating units intended. The one upstream in the direction of sheet travel The coating unit is a flexographic printing unit with one a high pressure mold and with the bow leading Impression cylinder in contact with forme cylinder, one with the form cylinder in contact with the rastered application roller for inking (coating) and an adjustable chamber doctor blade, with a feed pump for coating liquid supply and a suction pump for coating liquid return is connected, trained.

Aus DE 195 26 574 C1 ist ein Verfahren und eine Vorrichtung zum Reinigen eines Formzylinders (mit Druckform) und einer Auftragwalze bekannt, wodurch das Antrocknen von schnelltrocknenden Medien auf der Auftragwalze und auf dem Formzylinder reduziert wird. Die Waschvorrichtung weist zwei gekrümmte Flächen, die der Auftragwalze und dem Formzylinder zugewandt sind.DE 195 26 574 C1 describes a method and a device for cleaning one forme cylinder (with printing form) and one Applicator roller known, causing the drying of quick-drying Media on the application roller and on the forme cylinder is reduced. The washing device has two curved ones Areas that the application roller and the form cylinder are facing.

Ein Kammerrakel als Dosiersystem ist aus US 5,121,689 bekannt. Hierbei ist das Arbeitsrakel mit einer Ultraschalleinrichtung gekoppelt um die Schichtdicke der Druckfarbe auf der Dosierwalze zu dosieren.A chambered doctor blade as a metering system is known from US 5,121,689. Here is the working squeegee with an ultrasonic device coupled to the layer thickness of the printing ink the metering roller.

DE 196 45 934 A1 beschreibt eine gerasterte Auftragwalze, deren Näpfchen mit einer verflüssigbaren Substanz als Tiefdruckform befüllbar und mittels einer Ultraschallreinigungsanlage auf das Grundraster der Näpfchen regenerierbar ist.DE 196 45 934 A1 describes a screened application roller, their cells with a liquefiable substance as a gravure form can be filled and by means of an ultrasonic cleaning system can be regenerated to the basic grid of the cells.

Aus DE 41 21 017 C2 geht eine Waschvorrichtung mit einer weichen, glattgummibeschichteten Walze und einer zugeordneten Abstreifwalze mit polygonförmigen Querschnitt hervor. Zum Entfernen von Druckfarbe vom Mantel der Abstreifwalze ist eine Ultraschallreinigungseinrichtung vorgesehen.DE 41 21 017 C2 discloses a washing device with a soft, smooth rubber-coated roller and an associated Scraper roller with a polygonal cross section. To the Removing ink from the stripper roller jacket an ultrasonic cleaning device is provided.

Bei Bogenrotationsdruckmaschinen mit Druckeinheiten für den Mehrfarbendruck und wenigstens einer Beschichtungseinheit, zum Beispiel einem Flexodruckwerk und/oder einem Lackierwerk, ist es von Nachteil, dass das Beschichtungsfluid verunreinigt werden kann und die Druckqualität dadurch beeinträchtigt wird. Hierdurch können bereits während des Beschichtungsprozesses Qualitätsschwankungen auf einem Bogen auftreten.In sheet-fed rotary printing presses with printing units for the Multi-color printing and at least one coating unit, for example a flexographic printing unit and / or a coating unit, it is disadvantageous that the coating fluid contaminates can be affected and the print quality affected becomes. As a result, you can already during the coating process Quality fluctuations occur on a sheet.

[Aufgabe der Erfindung]OBJECT OF THE INVENTION

Der Erfindung liegt die Aufgabe zu Grunde, eine Bogenrotationsdruckmaschine der eingangs beschriebenen Art zu schaffen, die die genannten Nachteile vermeidet, die insbesondere eine stabile Qualität während des Beschichtungsprozess gestattet und eine Verunreinigung von Beschichtungsfluid spürbar reduziert.The invention is based on the object of a sheet-fed rotary printing press to create the type described at the beginning, which avoids the disadvantages mentioned, in particular a stable quality allowed during the coating process and noticeably reduces contamination of coating fluid.

Gelöst wird die Aufgabe durch die Ausbildungsmerkmale des Hauptanspruches. Weiterbildungen ergeben sich aus den Unteransprüchen.The task is solved by the training characteristics of Main claim. Further training results from the subclaims.

Ein erster Vorteil besteht darin, dass in einem Dosiersystem, bevorzugt gebildet aus einem Kammerrakel und einer zugeordneten gerasterten Auftragwalze, die Auftragwalze kontinuierlich oder diskontinuierlich von Verschmutzungen reinigbar ist. Alternativ ist statt einer gerasterten (Näpfchen und Stege) Auftragwalze auch eine Auftragwalze mit glatter Oberfläche innerhalb eines Dosiersystems einsetzbar.A first advantage is that in a dosing system, preferably formed from a chambered doctor blade and an associated one screened application roller, the application roller continuously or can be cleaned intermittently of dirt. Alternatively, instead of a grid (cell and bars) Applicator roller also an applicator roller with a smooth surface can be used within a dosing system.

Weiterhin ist vorteilhaft, dass insbesondere Farbrückspaltungen (Flexo-und/oder Offsetdruckfarbe vom voran gegangenen Druckprozess) vom Bedruckstoff in das Dosiersystem insbesondere der ersten Beschichtungseinheit vermeidbar sind. Diese Farbrückspaltungen resultieren aus dem Druckprozess in den in Förderrichtung vorgeordneten Druckwerken. Beispielsweise sind bei Einsatz eines Kammerrakels mit gerasterter Auftragwalze Ansammlungen von Farbresten im Inneren des Kammerrakels und/oder der Auftragwalze und somit mögliche Vermischungen mit dem Beschichtungsfluid vermeidbar. Bei Einsatz von Zweiwalzenwerken (nach dem Quetschwalzenprinzip mit einem gemeinsam gebildeten Walzenspalt) sind Ansammlungen von Farbresten im von der Dosierwalze und der Auftragwalze gebildeten Walzenspalt und/oder der Auftragwalze vermeidbar. Dies trifft ebenso auf Dosiersysteme nach dem Schöpfwalzenprinzip zu. Hierbei ist das Verunreinigen des Aufnahmebehälters, des Walzenzuges und/oder der Auftragwalze vermeidbar.It is also advantageous that in particular color cleavages (Flexographic and / or offset printing ink from the previous one Printing process) from the substrate to the dosing system in particular the first coating unit can be avoided. This Color cleavages result from the printing process in the Direction of delivery upstream printing units. For example, when using a chambered doctor blade with a raster Roller build-up of paint residue inside of the chambered doctor blade and / or the application roller and thus possible Mixing with the coating fluid can be avoided. When using two-roll mills (according to the squeeze roll principle with a jointly formed nip) are accumulations of paint residues in the metering roller and applicator roller formed nip and / or the applicator roll avoidable. This also applies to dosing systems according to the Bucket roller principle too. Here is the contamination of the Receiving container, the single drum roller and / or the applicator roller avoidable.

Ein weiterer Vorteil ist darin begründet, dass die Anzahl der Reinigungsintervalle für das jeweilige Dosiersystem mit Auftragwalze reduzierbar sind.Another advantage is that the number of Cleaning intervals for the respective dosing system with Application roller are reducible.

[Beispiele][Examples]

Die Erfindung soll an einem Ausführungsbeispiel näher erläutert werden. Dabei zeigen schematisch:

Fig.1
eine Bogenrotationsdruckmaschine für den Mehrfarbendruck mit zwei Beschichtungseinheiten,
Fig. 2 - 5
eine Beschichtungseinheit in verschiedenen Ausbildungen.
The invention will be explained in more detail using an exemplary embodiment. The following schematically show:
Fig. 1
a sheet-fed rotary printing machine for multi-color printing with two coating units,
Figs. 2-5
a coating unit in various designs.

Eine Druckmaschine ist mit mehreren Druckwerken 12 für den Mehrfarbendruck, vorzugsweise Offsetdruckwerken, in Reihenbauweise ausgebildet, wobei in Förderrichtung 5 der bogenförmigen Bedruckstoffe eine erste Beschichtungseinrichtung 13 und eine zweite Beschichtungseinrichtung 14 den Druckwerken 12 nachgeordnet sind. Zwischen den Beschichtungseinrichtungen 13, 14 ist bevorzugt eine Trocknereinheit 15 angeordnet. Der zweiten Beschichtungseinrichtung 14 ist ein Ausleger 19 nachgeordnet, der unter anderem durch umlaufende Fördersysteme 21 gebildet ist, die die Bogen auf einen Auslegerstapel 22 ablegen. Die Erfindung ist auch bei mehrfach angeordneten Beschichtungseinrichtungen 13,14 einsetzbar.A printing press is provided with a plurality of printing units 12 for the Multi-color printing, preferably offset printing units, in series formed, the arcuate in the conveying direction 5 Substrates a first coating device 13 and a second coating device 14 for the printing units 12 are subordinate. Between the coating facilities 13, 14, a dryer unit 15 is preferably arranged. The second coating device 14 is a boom 19 subordinate, among other things by circulating conveyor systems 21 is formed, the sheets on a delivery stack 22nd lay down. The invention is also in the case of multiple arrangements Coating devices 13, 14 can be used.

Ein Druckwerk 12 besteht im Wesentlichen aus einem Plattenzylinder 16, einem Gummituchzylinder 17 sowie einem Bogenführungszylinder 1, hier einem Druckzylinder. Dem Plattenzylinder 16 ist ein Farbwerk zugeordnet und gegebenenfalls ist weiterhin ein Feuchtwerk dem Plattenzylinder 16 benachbart zugeordnet, auf das hier nicht näher eingegangen werden soll.A printing unit 12 essentially consists of a plate cylinder 16, a blanket cylinder 17 and a sheet guide cylinder 1, here a pressure cylinder. The plate cylinder 16 is assigned an inking unit and, if appropriate, is a dampening unit adjacent to the plate cylinder 16 assigned, which will not be discussed in more detail here.

Zwischen den Druckwerken 12 und den Beschichtungseinrichtungen 13, 14 sowie der Trocknereinheit 15 sind jeweils ein Bogenführungszylinder 18 als Transferzylinder für den Transport der bogenförmigen Bedruckstoffe angeordnet. Die Bogenführungszylinder 1, 18 sind bezogen auf einen einfachgroßen Gummituchzyinder 17 bzw. Formzylinder 2 doppeltgroß ausgebildet. Between the printing units 12 and the coating devices 13, 14 and the dryer unit 15 are each one Sheet guide cylinder 18 as a transfer cylinder for transport the sheet-shaped substrates. The sheet guide cylinders 1, 18 are based on a single size Blanket cylinder 17 and forme cylinder 2 are double-sized.

Die erste Beschichtungseinrichtung 13 ist als Lackwerk, zum Beispiel zur Verarbeitung von Dispersionslack mit Pigmenten auf wässriger Basis, ausgebildet und besteht aus einem Bogenführungszylinder 1 (Druckzylinder), einem mit dem Bogenführungszylinder 1 in Kontakt bringbaren Formzylinder 2, der eine flexible Hochdruckplatte als Lackform trägt, und einem ersten Dosiersystem 20. Das erste Dosiersystem 20 ist durch eine mit dem Formzylinder 2 in Kontakt bringbare, gerasterte (mit Näpfchen und Stegen versehene) Auftragwalze 3 sowie ein mit dieser Auftragwalze 3 in Funktionsverbindung stehendes Kammerrakel 4 gebildet.The first coating device 13 is a coating unit for Example of processing dispersion varnish with pigments on an aqueous basis, formed and consists of a sheet guide cylinder 1 (impression cylinder), one with the sheet guide cylinder 1 contactable forme cylinder 2, the a flexible high-pressure plate as a lacquer form, and one first dosing system 20. The first dosing system 20 is through a gridable which can be brought into contact with the forme cylinder 2 Application roller 3 (provided with a cup and webs) and a with this applicator roller 3 in functional connection Chamber squeegee 4 formed.

Die zweite Beschichtungseinrichtung 14 ist ebenfalls als Lackwerk, zum Beispiel zur Verarbeitung von Dispersionslack auf wässriger Basis, ausgebildet und besteht wiederum aus einem Bogenführungszylinder 1 (Druckzylinder), einem mit dem Bogenführungszylinder 1 in Kontakt bringbaren Formzylinder 2, der ein Gummituch trägt, und einem zweiten Dosiersystem 20. Das zweite Dosiersystem 20 ist durch eine mit dem Formzylinder 2 in Kontakt bringbare Auftragwalze 3 mit bevorzugt glatter Oberfläche sowie eine Dosierwalze 23 mit gemeinsamen Walzenspalt gebildet.The second coating device 14 is also as Coating unit, for example for processing dispersion lacquer on an aqueous basis, trained and in turn consists of a sheet guide cylinder 1 (impression cylinder), one with the Sheet guiding cylinder 1, contactable form cylinder 2, which carries a rubber blanket and a second metering system 20. The second metering system 20 is through one with the forme cylinder 2 contactable applicator roller 3 with preferred smooth surface and a metering roller 23 with common Roll nip formed.

Jedes Dosiersystem 20 weist jeweils ein Leitungssystem mit Zuführleitung 10 und Rücklaufleitung 11 für den Umlauf eines flüssigen Beschichtungsmediums oder eines Reinigungsfluides auf. Dabei münden die Zuführleitungen 10 und die Rücklaufleitungen 11 im Inneren der Dosiersysteme 20. Bei einem Kammerrakel 4 ist dies die Kammer, welche mit der Auftragwalze 3 in Funktionsverbindung ist. Bei einem Zweiwalzenwerk (Quetschwalzenprinzip) mündet die Zuführleitung 10 oberhalb des gemeinsam gebildeten Walzenspaltes und die Rücklaufleitung 11 wird stirnseitig am Walzenspalt abgeführt. Alternativ mündet bei einem Dosiersystem 20 nach dem Schöpfwalzenprinzip die Zuführleitung 10 auf der Schöpfwalze oder in einem Behälter und die Rücklaufleitung 11 wird vom Behälter abgeführt.Each dosing system 20 has a line system Feed line 10 and return line 11 for the circulation of a liquid coating medium or a cleaning fluid on. The supply lines 10 and the return lines open 11 inside the dosing systems 20. With a chambered doctor blade 4, this is the chamber, which with the applicator roller 3 in Functional connection is. In a two-roll mill (squeeze roll principle) The feed line 10 opens above the jointly formed nip and the return line 11 is discharged at the front of the nip. Alternatively flows in a metering system 20 according to the scoop roller principle Feed line 10 on the scoop roller or in a container and the return line 11 is discharged from the container.

In den Beschichtungseinheiten 13, 14 ist zwischen jeder Auftragwalze 3 und jedem Formzylinder 2 ein Spalt 6 ausgebildet. Die Auftragwalzen 3 sowie die Formzylinder 2 sind an- bzw. abstellbar.In the coating units 13, 14 there is between each Application roller 3 and each forme cylinder 2 formed a gap 6. The application rollers 3 and the forme cylinder 2 are on or parkable.

Die den Druckwerken 12 nachgeordneten Beschichtungseinheiten 13, 14 weisen jeweils ein der entsprechenden Auftragwalze 3 an- und abstellbar zugeordnetes und über die Walzenbreite sich erstreckendes Reinigungsrakelsystem 8 auf, welches zwischen dein Spalt 6 (Kontaktstelle von Formzylinder 2 und Auftragwalze 3) in Drehrichtung 7 der entsprechenden Auftragwalze 3 zum jeweiligen Dosiersystem 20 (Kammerrakel 4, Dosierwalze 23) vorgeordnet ist. Das Reinigungsrakelsystem 8 weist bevorzugt je ein mit der Auftragwalze 3 in Funktionsverbindung stehendes Schließrakel sowie ein Arbeitsrakel auf. Schließ- und Arbeitsrakel sind an einem die Kammer ausbildenden Gehäuse, welches seitliche Dichtelemente aufweist, lösbar angeordnet.The coating units arranged downstream of the printing units 12 13, 14 each have one of the corresponding applicator rollers 3 assignable and disengageable and across the roller width extending cleaning doctor system 8, which between your gap 6 (contact point of forme cylinder 2 and Applicator roller 3) in the direction of rotation 7 of the corresponding applicator roller 3 to the respective metering system 20 (doctor blade 4, metering roller 23) is upstream. The cleaning doctor system 8 preferably has one each with the applicator roller 3 in functional connection standing closing squeegee and a working squeegee. Closing and working squeegees are on one forming the chamber Housing, which has lateral sealing elements, detachable arranged.

Das Reinigungsrakelsystem 8 weist vorzugsweise ein Ultraschallschwingsystem 9 auf, dessen Schwingungen unmittelbar auf die Walzenoberfläche der Auftragwalze 3 gerichtet sind. Bevorzugt ist das Ultraschallschwingsystem 9 am Gehäuse des Reinigungsrakelsystems 8 fixiert. Weiterhin ist das Reinigungsrakelsystem 8 mit einem im Inneren der Kammer einmündenden bzw. abführenden Zuführsystem 24 bzw. einem Rücklaufsystem 25 für den Umlauf eines Reinigungsfluids, z.B. Wasser, leitungsseitig gekoppelt. Der Umlauf wird über ein steuerbares Pumpensystem betrieben.The cleaning doctor system 8 preferably has an ultrasonic oscillation system 9, whose vibrations are immediate are directed onto the roller surface of the applicator roller 3. The ultrasonic vibration system 9 is preferably on the housing of the Cleaning squeegee system 8 fixed. Furthermore, the cleaning squeegee system 8 with one opening into the interior of the chamber or laxative feed system 24 or a return system 25 for the circulation of a cleaning fluid, e.g. Water, coupled on the line side. The circulation is controllable Pump system operated.

Das Ultraschallschwingsystem 9 ist während des Beschichtungsprozesses (Dosiersystem 20 ist aktiv) zu- oder abschaltbar und ist schaltungstechnisch mit einer Maschinensteuerung gekoppelt.
Das Reinigungsrakelsystem 8 ist während des Beschichtungsprozesses zur Auftragwalze 3, z.B. mittels Drehgelenk und Arbeitszylinder, an- bzw. abstellbar. Im angestellten Zustand ist über das Zuführsystem 24 und das Rücklaufsystem 25 ein Reinigungsfluid einbringbar. Bei Bedarf ist dann das Ultraschallschwingsystem 9 aktivierbar.
Bevorzugt ist bei einer Auftragwalze 3 mit glatter Oberfläche das Reinigungsrakelsystem 8 mit Rakelblättern und Zuführ- und Rücklaufsystem 24,25 einsetzbar. Bei Verwendung einer gerasterten Auftragwalze 3 wird bevorzugt das o.g. Reinigungssystem 8 mit zusätzlichem Ultraschallschwingsystem 9 eingesetzt.The ultrasonic vibration system 9 can be switched on or off during the coating process (dosing system 20 is active) and is connected in terms of circuitry to a machine control.
The cleaning squeegee system 8 can be turned on or off during the coating process for the application roller 3, for example by means of a swivel joint and working cylinder. In the employed state, a cleaning fluid can be introduced via the feed system 24 and the return system 25. If necessary, the ultrasonic vibration system 9 can then be activated.
In the case of an application roller 3 with a smooth surface, the cleaning doctor system 8 with doctor blades and feed and return system 24, 25 can preferably be used. When using a rastered application roller 3, the above-mentioned cleaning system 8 with an additional ultrasonic vibration system 9 is preferably used.

In einer Ausbildung nach Fig. 2 ist das Reinigungsrakelsystem 8 gegenüberliegend zum Dosiersystem 20, hier dem Kammerrakel 4, der Auftragwalze 3 zugeordnet und weist ein Schließ- und ein Arbeitsrakel auf.2 is the cleaning doctor system 8 opposite the metering system 20, here the chambered doctor blade 4, assigned to the application roller 3 and has a closing and a working squeegee.

In Fig. 3 ist das Reinigungsrakelsystem 8 in das Dosiersystem 20, hier in das Kammerrakel 4, integriert, jedoch in Drehrichtung 7 dem Kammerrakel 4 vorgeordnet. Von Vorteil ist hierbei, dass lediglich ein Rakelblatt zur Trennung der Kammern von Kammerrakel 4 und Reinigungsrakelsystem 8 erforderlich ist und somit ein weiteres Rakelblatt eingespart wird.In Fig. 3, the cleaning doctor system 8 is in the metering system 20, here in the doctor blade 4, integrated, but in the direction of rotation 7 upstream of the doctor blade 4. Is an advantage here that only a doctor blade for separating the Chambers of chamber doctor 4 and cleaning doctor system 8 required is saved and thus another doctor blade becomes.

In Fig. 4 ist das Reinigungsrakelsystem 8 wiederum mit Schließ- und Arbeitsrakel ausgebildet, jedoch auf der gleichen Seite wie das Kammerrakel 4 zur Auftragwalze 3 und in Drehrichtung 7 vor diesem angeordnet. Hierbei schließt das Kammerrakel 4 unmittelbar an das Reinigungsrakelsystem 8 an. Dagegen zeigt Fig. 5 eine räumliche Trennung von Kammerrakel 4 und Reinigungsrakelsystem 8 auf, welche auf der gleichen Seite zur Auftragwalze 3 angeordnet sind.In Fig. 4, the cleaning doctor system 8 is again with Squeegee and working squeegee formed, but on the same Side like the doctor blade 4 to the applicator roller 3 and in Direction of rotation 7 arranged in front of this. This concludes Chamber doctor 4 directly to the cleaning doctor system 8. 5 shows a spatial separation of the chamber doctor blade 4 and cleaning squeegee system 8, which on the same Side to the applicator roller 3 are arranged.

Tritt während des Beschichtungsprozesses eine Farbrückspaltung an der Auftragwalze 3 (ggf. im Dosiersystem 20) in der ersten bzw. zweiten Beschichtungseinheit 13,14 oder ggf. weiteren Beschichtungseinheiten auf, so ist das jeweilige Reinigungsrakelsystem 8 aktivierbar. Das mittels Zuführsystem 24 und Rücklaufsystem 25 umlaufende Reinigungsfluid wird mit der Oberfläche der Auftragwalze 3 in Kontakt gebracht, die Farbe wird angelöst und abgeführt. Je nach Verschmutzungsgrad bzw. nach Art der Oberfläche der Auftragwalze 3 ist das Ultraschallschwingsystem 9 zur zusätzlichen Unterstützung der Reinigungswirkung aktivierbar. Der Reinigungsprozess ist dabei kontinuierlich oder diskontinuierlich durchführbar.A color cleavage occurs during the coating process on the application roller 3 (possibly in the metering system 20) in the first or second coating unit 13, 14 or possibly further coating units, so is the respective one Cleaning squeegee system 8 can be activated. This by means of a feed system 24 and return system 25 circulating cleaning fluid is with brought into contact with the surface of the application roller 3, the Color is loosened and removed. Depending on the degree of pollution or according to the type of surface of the application roller 3 Ultrasonic vibration system 9 for additional support of the Activating cleaning effect. The cleaning process is can be carried out continuously or discontinuously.

Um einen Eintrag von restlichem Reinigungsfluid in das Dosiersystem 20 zu vermeiden kann innerhalb des Reinigungsrakelsystems 8 eine Blaseinrichtung, z.B. ein Über die Walzenbreite sich erstreckendes Blasrohr, zum Trocknen der Auftragwalze 3 durch Ausblasen angeordnet sein. Alternativ kann diese Blaseinrichtung auch zwischen Reinigungsrakelsystem 8 und dem Dosiersystem 20, z.B. Kammerrakel 4, angeordnet sein. In einer Weiterbildung kann das Reinigungsrakelsystem 8 im Inneren wenigstens eine die Reinigungswirkung unterstützende Reinigungsbürste aufweisen.To prevent residual cleaning fluid from entering the dosing system 20 can be avoided within the cleaning squeegee system 8 a blowing device, e.g. on across the roll width extending blow tube, for drying the applicator roller 3 be arranged by blowing. Alternatively, you can this blowing device also between cleaning doctor system 8 and the dosing system 20, e.g. Doctor blade 4, may be arranged. In a further development, the cleaning doctor system 8 can Inside at least one that supports the cleaning effect Have a cleaning brush.

Bei Ausbildung des Dosiersystems 20 mit Kammerrakel 4 und gerasterter Auftragwalze 3 ist in einer Ausbildung am Kammerrakel 4 ein Ultraschallschwingsystem angeordnet. Bevorzugt ist diese Anordnung analog zum Ultraschallschwingsystem 9 im Reinigungsrakelsystem 8 ausführbar. Die Ausbildung eines Kammerrakels 4 mit Ultraschallsystem hat den Vorteil, daß kontinuierlich oder diskontinuierlich Ultraschallschwingungen auf das Beschichtungmedium im Inneren des Kammerrakels 4 einwirken. Dadurch wird das Zusammenführen von Mikroschaumbläschen, welche u.a. durch von entleerten Näpfchen der gerasterten Auftragwalze 3 in das Innere des Kammerrakels 4 tranportierte Luft entstehen, spürbar verbessert. Die derart gebildeten, größeren Gasblasen sind bevorzugt aus dem Inneren des Kammerrakels 4 abführbar. Vorher schwimmen die größeren Gasblasen schneller als die Mikroschaumbläschen im Inneren des Kammerrakels 4 auf. Mit der Entfernung der Gasblasen wird der Beschichtungsprozesses zusätzlich unterstützt und weiterhin die Qualität stabilisiert. When forming the dosing system 20 with chamber doctor 4 and screened applicator roller 3 is in training on the chamber doctor blade 4 an ultrasonic vibration system is arranged. Prefers this arrangement is analogous to the ultrasonic vibration system 9 in Cleaning doctor system 8 executable. Training a Chamber doctor 4 with ultrasound system has the advantage that continuous or discontinuous ultrasonic vibrations on the coating medium inside the chambered doctor blade 4 act. This will bring together micro foam bubbles, which among others through from empty cups screened applicator roller 3 into the interior of the chambered doctor blade 4 transported air is created, noticeably improved. The so formed, larger gas bubbles are preferred from the inside of the doctor blade 4 removable. The bigger ones swim beforehand Gas bubbles faster than the micro foam bubbles inside of the doctor blade 4. With the removal of the gas bubbles the coating process additionally supported and continues the quality stabilized.

[Bezugszeichenliste][List of reference numerals]

11
- Druckzylinder- impression cylinder
22nd
- Formzylinder- forme cylinder
33rd
- Auftragwalze- applicator roller
44th
- Kammerrakel- Chamber squeegee
55
- Förderrichtung- direction of conveyance
66
- Spalt- gap
77
- Drehrichtung- Direction of rotation
88th
- Reinigungsrakelsystem- cleaning squeegee system
99
- Ultraschallschwingsystem- ultrasonic vibration system
1010th
- Zuführleitung- supply line
1111
- Rücklaufleitung- return line
1212th
- Druckwerk- printing unit
1313
- Beschichtungseinheit- coating unit
1414
- Beschichtungseinheit- coating unit
1515
- Trocknereinheit- dryer unit
1616
- Plattenzylinder- plate cylinder
1717th
- Gummituchzylinder- Blanket cylinder
1818th
- Transferzylinder- transfer cylinder
1919th
- Ausleger- boom
2020th
- Dosiersystem- dosing system
2121
- Fördersystem- conveyor system
2222
- Auslegerstapel- Boom stack
2323
- Dosierwalze- metering roller
2424th
- Zuführsystem- feeding system
2525th
- Rücklaufsystem- return system

Claims (5)

Bogenrotationsdruckmaschine mit Druckeinheiten für den Mehrfarbendruck und wenigstens einer Beschichtungseinheit, wobei jede Beschichtungseinheit einen Bogenführungszylinder, einen Formzylinder und ein Dosiersystem mit einer Auftragwalze aufweist,
dadurch gekennzeichnet,
dass jede den Druckwerken (12) in Förderrichtung (5) nachgeordnete Beschichtungseinheit (13, 14) ein der Auftragwalze (3) an- und abstellbar zugeordnetes Reinigungsrakelsystem (8) aufweist, welches in Drehrichtung (7) der Auftragwalze (3) des Dosiersystems (20) vorgeordnet ist.Sheet-fed rotary printing machine with printing units for multi-color printing and at least one coating unit, each coating unit having a sheet guide cylinder, a forme cylinder and a metering system with an application roller,
characterized,
that each coating unit (13, 14) arranged downstream of the printing units (12) in the conveying direction (5) has a cleaning squeegee system (8) assigned to the applicator roller (3) which can be switched on and off and which in the direction of rotation (7) of the applicator roller (3) of the metering system ( 20) is upstream. Bogenrotationsdruckmaschine nach Anspruch 1,
dadurch gekennzeichnet,
dass das Reinigungsrakelsystem (8) aus einem Schließrakel und einem Arbeitsrakel und seitlichen Dichtelementen gebildet ist und ein Ultraschallschwingsystem (9) aufweist, dessen Schallschwingungen unmittelbar auf die Walzenoberfläche der Auftragwalze (3) gerichtet sind.Sheet-fed rotary printing machine according to claim 1,
characterized,
that the cleaning squeegee system (8) is formed from a closing squeegee and a working squeegee and lateral sealing elements and has an ultrasonic vibration system (9), the sound vibrations of which are directed directly onto the roller surface of the application roller (3). Bogenrotationsdruckmaschine nach Anspruch 1 und 2,
dadurch gekennzeichnet,
dass das Ultraschallschwingsystem (9) während des Beschichtungsprozesses zuschaltbar oder abschaltbar ist.Sheet-fed rotary printing machine according to claims 1 and 2,
characterized,
that the ultrasonic vibration system (9) can be switched on or off during the coating process. Bogenrotationsdruckmaschine nach Anspruch 1 und 2,
dadurch gekennzeichnet,
dass das Reinigungsrakelsystem (8) während des Beschichtungsprozesses mit der Auftragwalze (3) in oder außer Funktionsverbindung bringbar ist. Sheet-fed rotary printing machine according to claims 1 and 2,
characterized,
that the cleaning doctor system (8) can be brought into or out of functional connection with the application roller (3) during the coating process. Bogenrotationsdruckmaschine nach wenigstens Anspruch 1,
dadurch gekennzeichnet,
dass das Reinigungsrakelsystem (8) mit einem Zuführsystem (24) und einem Rücklaufsystem (25) für den Umlauf von Reinigungsfluid gekoppelt ist.Sheet-fed rotary printing machine according to at least claim 1,
characterized,
that the cleaning doctor system (8) is coupled to a feed system (24) and a return system (25) for the circulation of cleaning fluid.
EP00118343A 1999-10-20 2000-08-24 Sheet-fed rotary printing press with printing units for multicolour printing and at least one coating unit Expired - Lifetime EP1097813B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29918488U DE29918488U1 (en) 1999-10-20 1999-10-20 Sheet-fed rotary printing machine with printing units for multi-color printing and at least one coating unit
DE29918488U 1999-10-20

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EP1097813A2 true EP1097813A2 (en) 2001-05-09
EP1097813A3 EP1097813A3 (en) 2001-05-23
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EP (1) EP1097813B1 (en)
JP (1) JP3392822B2 (en)
AT (1) ATE244638T1 (en)
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JP3392822B2 (en) 2003-03-31
DE50002818D1 (en) 2003-08-14
US6371024B1 (en) 2002-04-16
DE29918488U1 (en) 1999-12-30
EP1097813A3 (en) 2001-05-23
JP2001113675A (en) 2001-04-24
ATE244638T1 (en) 2003-07-15
EP1097813B1 (en) 2003-07-09

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