EP0719639A2 - Dampening unit for a printing press - Google Patents

Dampening unit for a printing press Download PDF

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Publication number
EP0719639A2
EP0719639A2 EP95120136A EP95120136A EP0719639A2 EP 0719639 A2 EP0719639 A2 EP 0719639A2 EP 95120136 A EP95120136 A EP 95120136A EP 95120136 A EP95120136 A EP 95120136A EP 0719639 A2 EP0719639 A2 EP 0719639A2
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EP
European Patent Office
Prior art keywords
roller
dampening
plate cylinder
roll
diameter
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
EP95120136A
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German (de)
French (fr)
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EP0719639B1 (en
EP0719639A3 (en
Inventor
Robert Müller
Helmut Puschnerat
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Koenig and Bauer AG
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Koenig and Bauer Albert AG
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Application filed by Koenig and Bauer Albert AG filed Critical Koenig and Bauer Albert AG
Publication of EP0719639A2 publication Critical patent/EP0719639A2/en
Publication of EP0719639A3 publication Critical patent/EP0719639A3/en
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Publication of EP0719639B1 publication Critical patent/EP0719639B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/20—Details
    • B41F7/24—Damping devices
    • B41F7/26—Damping devices using transfer rollers

Definitions

  • the invention relates to a dampening system for an offset rotary printing press.
  • EP 04 62 490 A1 shows a generic dampening unit for a rotary printing press consisting of an immersion roller, a metering roller, a dampening roller and a dampening roller.
  • the dampening roller is optionally drivable such that slippage occurs either between the dampening roller and the dampening roller or between the dampening roller and the metering roller.
  • a dampening unit has become known from DE 27 45 330 A1, which consists of an immersion roller immersed in a dampening solution box, a transfer roller and a dampening roller and a dampening application roller.
  • the plunger roller has a chrome-plated surface and can be driven with a variable peripheral speed.
  • the transfer roller is coated with rubber, freely rotatable and can be adjusted to the dampening roller.
  • the dampening roller is chrome-plated and is driven by the plate cylinder via gear wheels.
  • the dampening roller has a soft coating and is dragged along by the dampening roller.
  • a disadvantage of this dampening system is that the ink is transferred from the inked printing plate to the The dampening roller is transferred to the remaining rollers of the dampening unit in the direction of the dampening solution box and thus settles on the rollers mentioned, so that in turn only an uneven transport of dampening solution can take place in the direction of the plate cylinder. As a result, there are quality defects in printing.
  • the invention has for its object to provide a dampening system with at least four rollers for applying dampening solution to a plate cylinder of an offset rotary printing press, in which carryover of printing ink onto the dampening roller and into the remaining dampening unit is largely avoided.
  • the advantages which can be achieved with the invention consist in particular in that, due to a difference in the peripheral speed between the dampening solution applicator roller and the dampening roller, there is an interruption of the carryover of ink in the direction of the dampening solution application even at a point close to the plate cylinder. Furthermore, an additional homogenization of the dampening solution is achieved by the above-mentioned circumferential speed difference between dampening solution application roller and dampening friction roller, so that the printing plates of the plate cylinder are moistened more uniformly. Due to the almost identical circumferential speed of the dampening roller and plate cylinder, the dampening solution is applied in a manner that is gentle on the printing plate.
  • An inventive four-roller dampening unit 1 consists of a with a water-friendly material, for. B. chrome or ceramic (z. B. aluminum oxide or chromium oxide) coated immersion roller 2, a rubber-coated transfer roller 3, an axially reciprocable dampening roller 4 with a water-friendly coating, for. B. chrome or ceramic, and from a rubber-coated dampening roller 5, which can be frictionally adjusted to a plate cylinder 6, so that it rotates at approximately the same or slightly smaller than the plate cylinder 6 peripheral speed, approximately with 99 to 99.5 percent .
  • the rollers 3; 5 can also be coated with rubber-like plastic, as z. B is already known from inking rollers.
  • the dipping roller 2 is partially immersed in a dampening solution box 7 with dampening solution 8 a.
  • the plunger roller 2 is driven by an electric motor 12 with an optionally variable speed.
  • the dipping roller 2 is in contact with the transfer roller 3.
  • the transfer roller 3 can e.g. B. be driven via a transfer roller pin fixed gear and a gear not shown with a gear ratio of about 1 to 3 with one of the plunger roller 2 against higher peripheral speed. It is also possible to equip the transfer roller 3 with a separate, not shown, speed-controlled electric motor drive, which maintains the ratio of the peripheral speeds of the transfer roller 3 and the dip roller 2 in a ratio of 1: 3.
  • the dampening roller 4 is driven at a peripheral speed which is lower than the peripheral speed of the plate cylinder 6, but which is proportional to the peripheral speed of the plate cylinder 6.
  • a drive consists of a single drive, e.g. B. a speed-adjustable geared motor 14 (Fig. 1).
  • the drive for the dampening roller 4 consists of a gear train of z. B. three gears 17, 18; 19.
  • the gear 21 is rotatably connected to a drive pin of the dampening roller 4 and the gear 22 is rotatably connected to a drive pin of the plate cylinder 6 (FIG. 2).
  • the gear 17 is in engagement with a drive gear 21 of the dampening roller 4, the gear 19 is in engagement with a drive gear 22 of the plate cylinder 6.
  • the machine drive acts on the gear 22 of the plate cylinder 6.
  • the dampening roller 5 is placed on the plate cylinder 6 in such a way that it is driven by the plate cylinder 6 in a frictional manner, whereby, as already mentioned in the first embodiment, low frictional losses occur in the peripheral speed of the dampening roller 5 with respect to the plate cylinder 6.
  • a pressure strip in a contact area 23 between the dampening roller 5 and the plate cylinder 6 with a width of five to eleven millimeters can be set on the elastic surface of the dampening roller 5.
  • dampening roller 5 assumes, at least approximately, the peripheral speed of the plate cylinder 6 (with printing plates occupied), while in a contact area 24 between the dampening roller 4 and the dampening roller 5 a differential speed arises because the dampening roller 4 has a lower peripheral speed, e.g. B. 96 percent, compared to the dampening roller 5, the force of the dampening roller 4 and the dampening roller 5 is selected so that it does not follow the speed of the dampening roller 4, but the speed of the plate cylinder 6.
  • the diameter d6 of the plate cylinder 6, the diameter d5 of the dampening roller 5, the diameter d4 of the dampening roller 4, the diameter d3 of the transfer roller 3 and the diameter d2 of the dipping roller 2 behave as 1 to (0.51 to 0.88) to ( 0.45 to 0.7) to (0.34 to 0.75) to (0.3 to 0.6).
  • the diameters d6 to d5 to d4 to d3 to d2 relate to one another as 1 to 0.77 to 0.64 to 0.66 to 0.6.
  • the circumferential speeds from plate cylinder 6 to dampening roller 5 to dampening roller 4 to transfer roller 3 to immersion roller 2 behave as 1 to 1 to (0.4 to 0.99) to (0.25 to 0.4) to (0.08 to 0 , 18).
  • the Circumferential speeds from plate cylinder 6 to dampening roller 5 to dampening roller 4 to transfer roller 3 to immersion roller 2 as 1 to 1 to 0.96 to 0.33 to 0.1.
  • the plate cylinder 6 With each change in the speed of the machine, ie the plate cylinder 6, there is a proportional change in the peripheral speed of the rollers 2 to 5.
  • the cylinders, rollers, gears described above are stored in two side frames, not shown.
  • the rollers are adjustable against each other by known means, such as. B. eccentric bushings.
  • roller train consisting of immersion roller 2, transfer roller 3, dampening roller 4 and dampening roller 5
  • at least one further water-friendly roller not shown, arranged between the dampening roller 4 and the dampening roller 5.
  • This roller can be driven by the dampening roller 5 with a friction fit, so that a contact area 24 with a corresponding speed difference of preferably three to four percent between the dampening roller 4 and the mentioned, not shown roller arises.

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

Abstract

The dampener is for a rotary offset printing press. It consists of a variable-speed moistened immersing roll (2), a plastics-coated transfer roll (3), a damping roll (4), and an applicator roll (5) acting with the platen cylinder (6). The damping roll is driven at a speed proportional to, but different from, that of the platen cylinder. The damping roll speed also differs from the speeds of the transfer roll and the immersing roll. The dias. of the platen cylinder, applicator roll, damping roll, transfer roll and immersing roll are in specified ratios to each other.

Description

Die Erfindung betrifft ein Feuchtwerk für eine Offset-Rotationsdruckmaschine.The invention relates to a dampening system for an offset rotary printing press.

Die EP 04 62 490 A1 zeigt ein gattungsgemäßes Feuchtwerk für eine Rotationsdruckmaschine bestehend aus einer Tauchwalze, einer Dosierwalze, einer Feuchtreibwalze und einer Feuchtauftragwalze. Dabei ist wahlweise die Feuchtreibwalze derart antreibbar, daß entweder zwischen der Feuchtreibwalze und der Feuchtauftragwalze oder zwischen der Feuchtreibwalze und der Dosierwalze Schlupf auftritt.EP 04 62 490 A1 shows a generic dampening unit for a rotary printing press consisting of an immersion roller, a metering roller, a dampening roller and a dampening roller. The dampening roller is optionally drivable such that slippage occurs either between the dampening roller and the dampening roller or between the dampening roller and the metering roller.

Durch die DE 27 45 330 A1 ist ein Feuchtwerk bekanntgeworden, welches aus einer in einen Feuchtmittelkasten eintauchenden Tauchwalze, einer Übertragwalze und einer Feuchtreibwalze und einer Feuchtauftragwalze besteht. Die Tauchwalze hat eine verchromte Oberfläche und ist mit veränderbarer Umfangsgeschwindigkeit antreibbar. Die Übertragwalze ist mit Gummi beschichtet, frei drehbar gelagert sowie anstellbar an die Feuchtreibwalze. Die Feuchtreibwalze ist verchromt und wird durch den Plattenzylinder über Zahnräder angetrieben. Die Feuchtauftragwalze weist einen weichen Überzug auf und wird von der Feuchtreibwalze durch Reibung mitgenommen.A dampening unit has become known from DE 27 45 330 A1, which consists of an immersion roller immersed in a dampening solution box, a transfer roller and a dampening roller and a dampening application roller. The plunger roller has a chrome-plated surface and can be driven with a variable peripheral speed. The transfer roller is coated with rubber, freely rotatable and can be adjusted to the dampening roller. The dampening roller is chrome-plated and is driven by the plate cylinder via gear wheels. The dampening roller has a soft coating and is dragged along by the dampening roller.

Nachteilig bei diesem Feuchtwerk ist jedoch, daß von der eingefärbten Druckplatte Druckfarbe über die Feuchtauftragwalze auf die übrigen Walzen des Feuchtwerkes in Richtung Feuchtmittelkasten übertragen wird und sich somit auf den genannten Walzen absetzt, so daß wiederum nur ein ungleichmäßiger Feuchtmitteltransport in Richtung Plattenzylinder stattfinden kann. Hierdurch sind Qualitätsmängel beim Druck zu verzeichnen.A disadvantage of this dampening system, however, is that the ink is transferred from the inked printing plate to the The dampening roller is transferred to the remaining rollers of the dampening unit in the direction of the dampening solution box and thus settles on the rollers mentioned, so that in turn only an uneven transport of dampening solution can take place in the direction of the plate cylinder. As a result, there are quality defects in printing.

Der Erfindung liegt die Aufgabe zugrunde, ein Feuchtwerk mit mindestens vier Walzen zum Aufbringen von Feuchtmittel auf einen Plattenzylinder einer Offset-Rotationsdruckmaschine zu schaffen, bei welchem ein Verschleppen von Druckfarbe auf die Feuchtreibwalze und in das restliche Feuchtwerk weitestgehend vermieden wird.The invention has for its object to provide a dampening system with at least four rollers for applying dampening solution to a plate cylinder of an offset rotary printing press, in which carryover of printing ink onto the dampening roller and into the remaining dampening unit is largely avoided.

Erfindungsgemäß wird diese Aufgabe durch die Merkmale des kennzeichnenden Teils des Anspruches 1 gelöst.According to the invention, this object is achieved by the features of the characterizing part of claim 1.

Die mit der Erfindung erzielbaren Vorteile bestehen insbesondere darin, daß infolge einer Umfangsgeschwindigkeitsdifferenz zwischen Feuchtmittel-Auftragwalze und der Feuchtreibwalze schon an einer plattenzylindernahen Stelle eine Unterbrechung des Verschleppens von Farbe in Richtung Feuchtmittelauftrag erfolgt. Weiterhin wird durch die genannte Umfangsgeschwindigkeitsdifferenz zwischen Feuchtmittel-Auftragwalze und Feuchtreibwalze eine zusätzliche Homogenisierung des Feuchtmittels erreicht, so daß eine gleichmäßigere Befeuchtung, der Druckplatten des Plattenzylinders erfolgt. Infolge einer nahezu gleichen Umfangsgeschwindigkeit von Feuchtauftragwalze und Plattenzylinder findet ein druckplattenschonendes Auftragen des Feuchtmittels statt.The advantages which can be achieved with the invention consist in particular in that, due to a difference in the peripheral speed between the dampening solution applicator roller and the dampening roller, there is an interruption of the carryover of ink in the direction of the dampening solution application even at a point close to the plate cylinder. Furthermore, an additional homogenization of the dampening solution is achieved by the above-mentioned circumferential speed difference between dampening solution application roller and dampening friction roller, so that the printing plates of the plate cylinder are moistened more uniformly. Due to the almost identical circumferential speed of the dampening roller and plate cylinder, the dampening solution is applied in a manner that is gentle on the printing plate.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben.An embodiment of the invention is shown in the drawing and will be described in more detail below.

Es zeigen

Fig. 1
eine schematische Darstellung mit einem Querschnitt eines erfindungsgemäßen Vierwalzen-Feuchtwerkes;
Fig. 2
eine Darstellung entsprechend Fig. 1, jedoch mit einem alternativen Antrieb der Feuchtreibwalze.
Show it
Fig. 1
is a schematic representation with a cross section of a four-roller dampening system according to the invention;
Fig. 2
a representation corresponding to FIG. 1, but with an alternative drive of the dampening roller.

Ein erfindungsgemäßes Vierwalzen-Feuchtwerk 1 besteht aus einer mit einem wasserfreundlichen Material, z. B. Chrom oder Keramik (z. B. Aluminiumoxid oder Chromoxid) beschichteten Tauchwalze 2, einer mit Gummi beschichteten Übertragwalze 3, einer in axialer Richtung hin- und herbewegbaren Feuchtreibwalze 4 mit einer wasserfreundlichen Beschichtung, z. B. Chrom oder Keramik, sowie aus einer mit Gummi beschichteten Feuchtauftragwalze 5, welche an einen Plattenzylinder 6 reibschlüssig anstellbar ist, so daß diese mit annähernd der gleichen oder gegenüber dem Plattenzylinder 6 geringfügig kleineren Umfangsgeschwindigkeit umläuft, ca. mit 99 bis 99,5 Prozent. Die Walzen 3; 5 können auch mit gummiartigen Kunststoff beschichtet sein, wie dies z. B von Farbauftragswalzen her bereits bekannt ist. Die Tauchwalze 2 taucht zum Teil in einen Feuchtmittelkasten 7 mit Feuchtmittel 8 ein. Die Tauchwalze 2 wird von einem Elektromotor 12 mit wahlweise veränderbarer Drehzahl angetrieben. Die Tauchwalze 2 steht in Kontakt mit der Übertragwalze 3. Die Übertragwalze 3 kann z. B. über ein übertragwalzenzapfenfestes Zahnrad und ein nichtdargestelltes Getriebe mit einem Übersetzungsverhältnis von etwa 1 zu 3 mit einer der Tauchwalze 2 gegenüber höheren Umfangsgeschwindigkeit angetrieben werden. Es ist auch möglich, die Übertragwalze 3 mit einem separaten nichtdargestellten drehzahlgeregelten Elektromotorantrieb auszustatten, welcher das Verhältnis der Umfangsgeschwindigkeiten von Übertragwalze 3 und Tauchwalze 2 im Verhältnis 1 : 3 aufrechthält.An inventive four-roller dampening unit 1 consists of a with a water-friendly material, for. B. chrome or ceramic (z. B. aluminum oxide or chromium oxide) coated immersion roller 2, a rubber-coated transfer roller 3, an axially reciprocable dampening roller 4 with a water-friendly coating, for. B. chrome or ceramic, and from a rubber-coated dampening roller 5, which can be frictionally adjusted to a plate cylinder 6, so that it rotates at approximately the same or slightly smaller than the plate cylinder 6 peripheral speed, approximately with 99 to 99.5 percent . The rollers 3; 5 can also be coated with rubber-like plastic, as z. B is already known from inking rollers. The dipping roller 2 is partially immersed in a dampening solution box 7 with dampening solution 8 a. The plunger roller 2 is driven by an electric motor 12 with an optionally variable speed. The dipping roller 2 is in contact with the transfer roller 3. The transfer roller 3 can e.g. B. be driven via a transfer roller pin fixed gear and a gear not shown with a gear ratio of about 1 to 3 with one of the plunger roller 2 against higher peripheral speed. It is also possible to equip the transfer roller 3 with a separate, not shown, speed-controlled electric motor drive, which maintains the ratio of the peripheral speeds of the transfer roller 3 and the dip roller 2 in a ratio of 1: 3.

Die Feuchtreibwalze 4 wird mit einer Umfangsgeschwindigkeit angetrieben, die geringer ist als die Umfangsgeschwindigkeit des Plattenzylinders 6, die sich jedoch proportional zur Umfangsgeschwindigkeit des Plattenzylinders 6 verhält. Zweckmäßigerweise besteht ein derartiger Antrieb aus einem Einzelantrieb, z. B. einem drehzahlregalbaren Getriebemotor 14 (Fig. 1).The dampening roller 4 is driven at a peripheral speed which is lower than the peripheral speed of the plate cylinder 6, but which is proportional to the peripheral speed of the plate cylinder 6. Expediently, such a drive consists of a single drive, e.g. B. a speed-adjustable geared motor 14 (Fig. 1).

In einer zweiten Ausführungsform besteht der Antrieb für die Feuchtreibwalze 4 aus einem Räderzug von z. B. drei Zahnrädern 17, 18; 19. Dabei ist das Zahnrad 21 drehfest mit einem Antriebszapfen der Feuchtreibwalze 4 und das Zahnrad 22 drehfest mit einen Antriebszapfen des Plattenzylinders 6 verbunden (Fig. 2).In a second embodiment, the drive for the dampening roller 4 consists of a gear train of z. B. three gears 17, 18; 19. The gear 21 is rotatably connected to a drive pin of the dampening roller 4 and the gear 22 is rotatably connected to a drive pin of the plate cylinder 6 (FIG. 2).

Das Zahnrad 17 steht mit einem Antriebszahnrad 21 der Feuchtreibwalze 4, das Zahnrad 19 steht mit einem Antriebsrad 22 des Plattenzylinders 6 in Eingriff. Außerdem wirkt auf das Zahnrad 22 des Plattenzylinders 6 der Maschinenantrieb ein.The gear 17 is in engagement with a drive gear 21 of the dampening roller 4, the gear 19 is in engagement with a drive gear 22 of the plate cylinder 6. In addition, the machine drive acts on the gear 22 of the plate cylinder 6.

Die Feuchtauftragwalze 5 wird so an den Plattenzylinder 6 angestellt, daß diese reibschlüssig vom Plattenzylinder 6 angetrieben wird, wobei wie bereits bei der ersten Ausführungsform erwähnt, bei der Umfangsgeschwindigkeit der Feuchtauftragwalze 5 gegenüber dem Plattenzylinder 6 geringe Reibungsverluste auftreten. Dabei kann auf der elastischen Oberfläche der Feuchtauftragwalze 5 ein Andruckstreifen in einem Berührungsbereich 23 zwischen der Feuchtauftragwalze 5 und dem Plattenzylinder 6 mit einer Breite von fünf bis elf Millimetern eingestellt werden. Hierdurch wird erreicht, daß die Feuchtauftragwalze 5 zumindest annähernd, die Umfangsgeschwindigkeit des Plattenzylinders 6 (mit belegten Druckplatten) annimmt, während in einem Berührungsbereich 24 zwischen Feuchtreibwalze 4 und der Feuchtauftragwalze 5 eine Differenzgeschwindigkeit entsteht, da die Feuchtreibwalze 4 eine geringere Umfangsgeschwindigkeit, z. B. 96 Prozent, gegenüber der Feuchtauftragwalze 5 aufweist, wobei die Anstellungskraft der Feuchtreibwalze 4 und der Feuchtauftragwalze 5 so gewählt ist, daß sie nicht der Drehzahl der Feuchtreibwalze 4 folgt, sondern der Drehzahl des Plattenzylinders 6.The dampening roller 5 is placed on the plate cylinder 6 in such a way that it is driven by the plate cylinder 6 in a frictional manner, whereby, as already mentioned in the first embodiment, low frictional losses occur in the peripheral speed of the dampening roller 5 with respect to the plate cylinder 6. A pressure strip in a contact area 23 between the dampening roller 5 and the plate cylinder 6 with a width of five to eleven millimeters can be set on the elastic surface of the dampening roller 5. This ensures that the dampening roller 5 assumes, at least approximately, the peripheral speed of the plate cylinder 6 (with printing plates occupied), while in a contact area 24 between the dampening roller 4 and the dampening roller 5 a differential speed arises because the dampening roller 4 has a lower peripheral speed, e.g. B. 96 percent, compared to the dampening roller 5, the force of the dampening roller 4 and the dampening roller 5 is selected so that it does not follow the speed of the dampening roller 4, but the speed of the plate cylinder 6.

Es ist auch möglich, an die Feuchtauftragwalze 5 zusätzlich noch eine harte mit Kunststoff beschichtete angetriebene Farbreibwalze 26 eines nichtdargestellten Farbwerkes reibschlüssig anzustellen, welche mittels eines drehzahlregelbaren Getriebemotors 16 (Fig. 1) oder mittels eines Zahnrades 27 von Zahnrad 19 angetrieben wird (Fig. 2). Die Umfangsgeschwindigkeit der Farbreibwalze 26 ist gleich oder annähernd gleich der Umfangsgeschwindigkeit des Plattenzylinders 6.It is also possible to additionally frictionally engage the wet application roller 5 with a hard, plastic-coated, driven inking roller 26 of an inking mechanism, not shown, which is driven by a gearwheel 19 by means of a speed-controllable geared motor 16 (FIG. 1) or by a gearwheel 27 (FIG. 2 ). The peripheral speed of the inking roller 26 is equal to or approximately the same as the peripheral speed of the plate cylinder 6.

Der Durchmesser d6 des Plattenzylinders 6, der Durchmesser d5 der Feuchtauftragwalze 5, der Durchmesser d4 der Feuchtreibwalze 4, der Durchmesser d3 der Übertragwalze 3 und der Durchmesser d2 der Tauchwalze 2 verhält sich wie 1 zu (0,51 bis 0,88) zu (0,45 bis 0,7) zu (0,34 bis 0,75) zu (0,3 bis 0,6). Bei einer bevorzugten Ausführungsform verhalten sich die Durchmesser d6 zu d5 zu d4 zu d3 zu d2 zueinander wie 1 zu 0,77 zu 0,64 zu 0,66 zu 0,6.The diameter d6 of the plate cylinder 6, the diameter d5 of the dampening roller 5, the diameter d4 of the dampening roller 4, the diameter d3 of the transfer roller 3 and the diameter d2 of the dipping roller 2 behave as 1 to (0.51 to 0.88) to ( 0.45 to 0.7) to (0.34 to 0.75) to (0.3 to 0.6). In a preferred embodiment, the diameters d6 to d5 to d4 to d3 to d2 relate to one another as 1 to 0.77 to 0.64 to 0.66 to 0.6.

Die Umfangsgeschwindigkeiten von Plattenzylinder 6 zu Feuchtauftragswalze 5 zu Feuchtreibwalze 4 zu Übertragwalze 3 zu Tauchwalze 2 verhalten sich wie 1 zu 1 zu (0,4 bis 0,99) zu (0,25 bis 0,4) zu (0,08 bis 0,18).The circumferential speeds from plate cylinder 6 to dampening roller 5 to dampening roller 4 to transfer roller 3 to immersion roller 2 behave as 1 to 1 to (0.4 to 0.99) to (0.25 to 0.4) to (0.08 to 0 , 18).

Bei einer bevorzugten Ausführungsform verhalten sich die Umfangsgeschwindigkeiten von Plattenzylinder 6 zu Feuchtauftragwalze 5 zu Feuchtreibwalze 4 zu Übertragwalze 3 zu Tauchwalze 2 wie 1 zu 1 zu 0,96 zu 0,33 zu 0,1. Bei jeder Drehzahländerung der Maschine, d. h. des Plattenzylinder 6 erfolgt eine proportionale Umfangsgeschwindigkeitsänderung der Walzen 2 bis 5.In a preferred embodiment, the Circumferential speeds from plate cylinder 6 to dampening roller 5 to dampening roller 4 to transfer roller 3 to immersion roller 2 as 1 to 1 to 0.96 to 0.33 to 0.1. With each change in the speed of the machine, ie the plate cylinder 6, there is a proportional change in the peripheral speed of the rollers 2 to 5.

Die Lagerung der oben beschriebenen Zylinder, Walzen, Zahnräder erfolgt in zwei nichtdargestellten Seitengestellen. Die Walzen sind aneinander anstellbar durch bekannte Mittel, wie z. B. Exzenterbuchsen.The cylinders, rollers, gears described above are stored in two side frames, not shown. The rollers are adjustable against each other by known means, such as. B. eccentric bushings.

Es ist auch möglich, die Tauchwalze 2 nicht in einem Feuchtmittelkasten 7 eintauchen zu lassen, sondern das Feuchtmittel mit einem bekannten Sprühfeuchtwerk, z. B. mit einem nach DE 41 25 012 A1 auf die Tauchwalze 2 aufzubringen.It is also possible not to immerse the immersion roller 2 in a dampening solution box 7, but rather to use a known spray dampening system, e.g. B. with one according to DE 41 25 012 A1 on the plunger roller 2.

Weiterhin ist es möglich, den aus Tauchwalze 2, Übertragwalze 3, Feuchtreibwalze 4 und Feuchtauftragwalze 5 bestehenden Walzenzug durch mindestens eine weitere, zwischen der Feuchtreibwalze 4 und der Feuchtauftragwalze 5 angeordnete, wasserfreundliche nichtdargestellte Walze zu ergänzen. Diese genannte Walze kann von der Feuchtauftragwalze 5 reibschlüssig angetrieben werden, so daß ein Berührungsbereich 24 mit einer entsprechenden Geschwindigkeitsdifferenz von vorzugsweise drei bis vier Prozent zwischen der Feuchtreibwalze 4 und der genannten, nichtdargestellten Walze entsteht. Durch das Zwischenschalten der genannten Walze kehren sich dann die Drehrichtungen der Feuchtreibwalze 4, der Übertragwalze 3 sowie der Tauchwalze 2 um.It is also possible to supplement the roller train consisting of immersion roller 2, transfer roller 3, dampening roller 4 and dampening roller 5 by at least one further water-friendly roller, not shown, arranged between the dampening roller 4 and the dampening roller 5. This roller can be driven by the dampening roller 5 with a friction fit, so that a contact area 24 with a corresponding speed difference of preferably three to four percent between the dampening roller 4 and the mentioned, not shown roller arises. By interposing the aforementioned roller, the directions of rotation of the dampening roller 4, the transfer roller 3 and the dipping roller 2 are reversed.

TeilelisteParts list

11
Vierwalzen-FeuchtwerkFour-roller dampening system
22nd
Tauchwalze (1)Dipping roller (1)
33rd
Übertragwalze (1)Transfer roller (1)
44th
Feuchtreibwalze (1)Dampening roller (1)
55
Feuchtauftragwalze (1)Dampening roller (1)
66
PlattenzylinderPlate cylinder
77
FeuchtmittelkastenFountain solution box
88th
Feuchtmittel (7)Dampening solution (7)
99
--
1010th
--
1111
--
1212th
Elektromotor (2)Electric motor (2)
1313
--
1414
Getriebemotor (4)Gear motor (4)
1515
--
1616
Getriebemotor (26)Gear motor (26)
1717th
Zahnrad (18; 21)Gear (18; 21)
1818th
Zahnrad (17; 19)Gear (17; 19)
1919th
Zahnrad (18; 22)Gear (18; 22)
2020th
--
2121
Zahnrad (4)Gear (4)
2222
Zahnrad (6)Gear (6)
2323
Berührungsbereich (5; 6)Touch area (5; 6)
2424th
Berührungsbereich (4; 5)Contact area (4; 5)
2525th
--
2626
FarbreibwalzeInk roller
2727
Zahnrad (26)Gear (26)
d2 bis d6d2 to d6
Durchmesser (2 bis 6)Diameter (2 to 6)

Claims (4)

Feuchtwerk (1) für eine Offset-Rotationsdruckmaschine, bestehend aus einer mit einer wahlweisen Drehzahl antreibbaren mit einen Feuchtmittel beaufschlagten Tauchwalze (2), einer kunststoffbeschichteten Übertragwalze (3), einer mit feuchtmittelfreundlichem Material beschichteten Feuchtreibwalze (4) sowie einer Feuchtauftragwalze (5), welche mit einem Plattenzylinder (6) zusammenwirkt, wobei die Feuchtreibwalze (4) mit einer der Umfangsgeschwindigkeit des Plattenzylinders (6) jeweils proportionalen, jedoch ungleichen Umfangsgeschwindigkeit antreibbar angeordnet ist, dadurch gekennzeichnet, daß die Umfangsgeschwindigkeit der Feuchtreibwalze (4) ungleich der jeweiligen Umfangsgeschwindigkeit der Übertragwalze (3) und der Tauchwalze (2) ist.Dampening unit (1) for an offset rotary printing machine, consisting of an immersion roller (2) which can be driven at an optional speed and which is loaded with a dampening solution, a plastic-coated transfer roller (3), a dampening roller (4) coated with dampening agent-friendly material and a dampening application roller (5), which cooperates with a plate cylinder (6), the dampening roller (4) being arranged to be drivable at a circumferential speed which is proportional to the circumferential speed of the plate cylinder (6) but is unequal, characterized in that the circumferential speed of the dampening roller (4) is not equal to the respective circumferential speed of the Transfer roller (3) and the dip roller (2). Feuchtwerk nach Anspruch 1, dadurch gekennzeichnet, daß sich die Durchmesser (d6) von Plattenzyllnders (6) zu Durchmesser (d5) der Feuchtauftragwalze (5), der Durchmesser (d5) der Feuchtauftragwalze (5) zu Durchmesser (d4) der Feuchtreibwalze (4), der Durchmesser (d4) der Feuchtreibwalze (4) zu Durchmesser (d3) der Übertragwalze (3) und der Durchmesser (d3) der Übertragwalze (3) zu Durchmesser (d2) der Tauchwalze (2) sich wie 1 zu (0,51 bis 0,88) zu (0,45 bis 0,7) zu (0,34 bis 0,75) zu (0,30 bis 0,60) verhalten.Dampening unit according to claim 1, characterized in that the diameters (d6) from the plate cylinder (6) to the diameter (d5) of the dampening roller (5), the diameter (d5) of the dampening roller (5) to the diameter (d4) of the dampening roller (4 ), the diameter (d4) of the dampening roller (4) to the diameter (d3) of the transfer roller (3) and the diameter (d3) of the transfer roller (3) to the diameter (d2) of the dipping roller (2) as 1 to (0, 51 to 0.88) to (0.45 to 0.7) to (0.34 to 0.75) to (0.30 to 0.60). Feuchtwerk nach Anspruch 1, dadurch gekennzeichnet, daß sich die Umfangsgeschwindigkeiten von Plattenzylinders (6) zu Feuchtauftragwalze (5), Feuchtreibwalze (4), zu Übertragwalze (3) zu Tauchwalze (2) wie 1 : 1 : (0,4 bis 0,99) : (0,25 bis 0,4) : (0,08 bis 0,18) verhalten.Dampening unit according to claim 1, characterized in that the peripheral speeds from the plate cylinder (6) to the dampening application roller (5), dampening roller (4), to the transfer roller (3) to the dipping roller (2) are as 1: 1: (0.4 to 0, 99): (0.25 to 0.4): (0.08 to 0.18) behavior. Feuchtwerk nach Anspruch 1, dadurch gekennzeichnet, daß in dem aus Tauchwalze (2), Übertragwalze (3), Feuchtreibwalze (4) und Feuchtauftragwalze (5) bestehenden Walzenzug zwischen der Feuchtreibwalze (4) und der Feuchtauftragwalze (5) mindestens eine weitere, mit einem Zwangsantrieb (27; 16) versehene Walze (26) angeordnet ist.Dampening unit according to claim 1, characterized in that in the roller train consisting of the dipping roller (2), transfer roller (3), dampening roller (4) and dampening roller (5), at least one further, with, between the dampening roller (4) and the dampening roller (5) a roller (26) provided with a positive drive (27; 16).
EP95120136A 1994-12-30 1995-12-20 Dampening unit for a printing press Expired - Lifetime EP0719639B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4447178A DE4447178A1 (en) 1994-12-30 1994-12-30 Dampening unit for a printing press
DE4447178 1994-12-30

Publications (3)

Publication Number Publication Date
EP0719639A2 true EP0719639A2 (en) 1996-07-03
EP0719639A3 EP0719639A3 (en) 1997-03-19
EP0719639B1 EP0719639B1 (en) 2000-03-15

Family

ID=6537467

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95120136A Expired - Lifetime EP0719639B1 (en) 1994-12-30 1995-12-20 Dampening unit for a printing press

Country Status (4)

Country Link
US (1) US5649481A (en)
EP (1) EP0719639B1 (en)
JP (1) JP3167606B2 (en)
DE (2) DE4447178A1 (en)

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DE10035786A1 (en) * 2000-07-22 2002-02-07 Koenig & Bauer Ag dampening

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DE19714222C1 (en) * 1997-04-07 1998-04-16 Koenig & Bauer Albert Ag Damping roller for offset rotary printers
IES80636B2 (en) * 1997-06-05 1998-10-21 Richard Harrington Improvements relating to printing
US5909707A (en) * 1997-07-24 1999-06-08 Heidelberger Druckmaschinen Ag High-speed printing system having multiple slipping nips
JP2001353839A (en) * 2000-04-14 2001-12-25 Komori Corp Structure of roller in printing machine
DE102004006231B3 (en) * 2004-02-09 2005-08-04 Koenig & Bauer Ag Transporting process for moistener involves increasing surface speed of second roll closer to that of the form cylinder as latter increases
DE102004056277A1 (en) * 2004-02-09 2005-09-08 Koenig & Bauer Ag Method for distributing a fountain solution to be transported from a first roller to the surface of a forme cylinder of a printing press
DE102008003239B4 (en) * 2007-02-06 2015-12-03 Heidelberger Druckmaschinen Ag Method for operating a dampening system of a printing press
US8419179B2 (en) * 2011-06-30 2013-04-16 Xerox Corporation Methods for UV gel ink leveling and direct-to-substrate digital radiation curable gel ink printing, apparatus and systems having leveling member with a metal oxide surface
US8764179B2 (en) 2011-07-08 2014-07-01 Xerox Corporation Methods for radiation curable gel ink leveling and direct-to-substrate digital radiation curable gel ink printing, apparatus and systems having pressure member with hydrophobic surface

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US5067401A (en) * 1988-11-10 1991-11-26 Toshiba Kikai Kabushiki Kaisha Moistening water supply apparatus for printing press
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JPS57123061A (en) * 1981-01-22 1982-07-31 Komori Printing Mach Co Ltd Damping device for press
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GB2082121A (en) * 1980-08-14 1982-03-03 Komori Printing Mach Water supply apparatus for printing press
US5067401A (en) * 1988-11-10 1991-11-26 Toshiba Kikai Kabushiki Kaisha Moistening water supply apparatus for printing press
EP0462490A1 (en) * 1990-06-21 1991-12-27 Heidelberger Druckmaschinen Aktiengesellschaft Film dampening system for a rotary press

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Publication number Priority date Publication date Assignee Title
DE10035786A1 (en) * 2000-07-22 2002-02-07 Koenig & Bauer Ag dampening

Also Published As

Publication number Publication date
JP3167606B2 (en) 2001-05-21
EP0719639B1 (en) 2000-03-15
DE4447178A1 (en) 1996-07-04
US5649481A (en) 1997-07-22
EP0719639A3 (en) 1997-03-19
JPH08230142A (en) 1996-09-10
DE59508003D1 (en) 2000-04-20

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