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EP0719639B1 - Dampening unit for a printing press - Google Patents

Dampening unit for a printing press Download PDF

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Publication number
EP0719639B1
EP0719639B1 EP95120136A EP95120136A EP0719639B1 EP 0719639 B1 EP0719639 B1 EP 0719639B1 EP 95120136 A EP95120136 A EP 95120136A EP 95120136 A EP95120136 A EP 95120136A EP 0719639 B1 EP0719639 B1 EP 0719639B1
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EP
European Patent Office
Prior art keywords
roll
roller
dampening
damping
damping solution
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP95120136A
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German (de)
French (fr)
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EP0719639A3 (en
EP0719639A2 (en
Inventor
Robert Müller
Helmut Puschnerat
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Koenig and Bauer AG
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Koenig and Bauer AG
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Publication date
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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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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F7/00Rotary lithographic machines
    • B41F7/20Details
    • B41F7/24Damping devices
    • B41F7/26Damping devices using transfer rollers

Definitions

  • the invention relates to a dampening system for a Offset rotary printing machine.
  • EP 04 62 490 A1 shows a generic dampening unit for a rotary printing press consisting of one Dip roller, a metering roller, a dampening roller and a dampening roller. It is optionally the Wet roller so driven that either between the dampening roller and the dampening roller or slip between the dampening roller and the metering roller occurs.
  • a dampening unit became known, which from one into one Dipping roller immersion roller, one Transfer roller and a dampening roller and one There is a dampening roller.
  • the dip roller has one chrome-plated surface and is changeable Peripheral speed drivable.
  • the transfer roller is coated with rubber, freely rotatable and adjustable to the dampening roller.
  • the dampening roller is chrome-plated and is covered by the plate cylinder Gears driven.
  • the dampening roller has a soft coating and is from the Wet friction roller taken away by friction.
  • the invention has for its object a dampening system with at least four rollers for applying Fountain solution on a plate cylinder one To create offset rotary printing press, which a carryover of ink on the dampening roller and largely avoided in the rest of the dampening system becomes.
  • a four-roller dampening unit 1 exists from a with a water-friendly material, e.g. B. Chromium or ceramics (e.g. aluminum oxide or chromium oxide) coated dip roller 2, one with rubber coated transfer roller 3, one in the axial direction reciprocating dampening roller 4 with a water-friendly coating, e.g. B. chrome or Ceramic, as well as from a rubber coated Moist application roller 5, which is connected to a plate cylinder 6 is frictionally adjustable, so that with approximately the same or opposite the plate cylinder 6 the peripheral speed is slightly lower, approx. with 99 to 99.5 percent.
  • the rollers 3; 5 can too be coated with rubber-like plastic like this e.g. B is already known from inking rollers.
  • the Dip roller 2 is partially immersed in a dampening solution box 7 with dampening solution 8 a.
  • the plunger roller 2 is from an electric motor 12 with optionally changeable Speed driven.
  • the dipping roller 2 is in contact with the transfer roller 3.
  • the transfer roller 3 can, for. B. via a transfer roller pin fixed gear and a not shown gearbox with a Gear ratio of about 1 to 3 with one of the Dip roller 2 against higher peripheral speed are driven. It is also possible that Transfer roller 3 with a separate, not shown equip speed-controlled electric motor drive, which is the ratio of the peripheral speeds of Transfer roller 3 and dip roller 2 in a ratio of 1: 3 maintains.
  • the dampening roller 4 is with a Peripheral speed driven, which is less than the peripheral speed of the plate cylinder 6, the however proportional to the peripheral speed of the Plate cylinder 6 behaves. Conveniently there is such a drive from a single drive, for. B. a speed-controllable geared motor 14 (Fig. 1).
  • the drive is for the dampening roller 4 from a gear train of z. B. three Gears 17, 18; 19.
  • the gear 21 is non-rotatable with a drive pin of the dampening roller 4 and that Gear 22 rotatably with a drive pin of the Plate cylinder 6 connected (Fig. 2).
  • the gear 17 stands with a drive gear 21 Wet roller 4, the gear 19 is with a Drive wheel 22 of the plate cylinder 6 in engagement.
  • the gear wheel 22 of the plate cylinder 6 also acts the machine drive.
  • the dampening roller 5 is thus on the plate cylinder 6 employed that this frictionally from Plate cylinder 6 is driven, as already mentioned in the first embodiment in which Circumferential speed of the dampening roller 5 compared to the plate cylinder 6 low friction losses occur. It can on the elastic surface Dampening roller 5 a pressure strip in one Contact area 23 between the dampening roller 5 and the plate cylinder 6 with a width of five to eleven millimeters can be set. This will achieved that the dampening roller 5 at least approximately, the peripheral speed of the Plate cylinder 6 (with occupied printing plates), while in a touch area 24 between Wet roller 4 and the dampening roller 5 a Differential speed arises because the Dampening roller 4 a lower peripheral speed, e.g. B. 96 percent, compared to the dampening roller 5 has, the engagement 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.
  • dampening roller 5 additionally a hard one coated with plastic driven inking roller 26 of a not shown
  • a speed-controllable geared motor 16 (Fig. 1) or driven by a gear 27 of gear 19 will (Fig. 2).
  • the peripheral speed of the Ink roller 26 is the same or approximately the same Circumferential 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 dip roller 2 behaves like 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).
  • peripheral speeds of plate cylinder 6 too Moist application roller 5 to dampening roller 4 too Transfer roller 3 to immersion roller 2 behave like 1 1 to (0.4 to 0.99) to (0.25 to 0.4) to (0.08 to 0.18).
  • the Circumferential speeds of plate cylinder 6 too Moist application roller 5 to dampening roller 4 too Transfer roller 3 to dip roller 2 as 1 to 1 to 0.96 0.33 to 0.1. Every time the machine changes speed, d. H. the plate cylinder 6 is proportional Circumferential speed change of rollers 2 to 5.
  • the storage of the cylinders, rollers, Gears are made in two, not shown Side frames.
  • the rollers are adjustable against each other by known means, such as. B. eccentric bushings.

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

Description

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

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 one Dip roller, a metering roller, a dampening roller and a dampening roller. It is optionally the Wet roller so driven that either between the dampening roller and the dampening roller or slip between the dampening roller and the metering roller occurs.

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.DE 27 45 330 A1 is a dampening unit became known, which from one into one Dipping roller immersion roller, one Transfer roller and a dampening roller and one There is a dampening roller. The dip roller has one chrome-plated surface and is changeable Peripheral speed drivable. The transfer roller is coated with rubber, freely rotatable and adjustable to the dampening roller. The dampening roller is chrome-plated and is covered by the plate cylinder Gears driven. The dampening roller has a soft coating and is from the Wet friction roller taken away by friction.

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 of the inked printing plate printing ink over the Damp applicator roller on the remaining rollers of the Transfer dampening system towards the dampening solution tank is and thus settles on the rollers mentioned, so that again just an uneven Dampening solution transport in the direction of the plate cylinder can take place. This results in quality defects in Pressure.

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 a dampening system with at least four rollers for applying Fountain solution on a plate cylinder one To create offset rotary printing press, which a carryover of ink on the dampening roller and largely avoided in the rest of the dampening system becomes.

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 solved.

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 that can be achieved with the invention exist especially in that as a result of Peripheral speed difference between Dampening roller and the dampening roller already an interruption at a point near the plate cylinder of dragging color towards The dampening solution is applied. Furthermore, the called circumferential speed difference between Dampening roller and dampening roller one additional homogenization of the dampening solution achieved, so that a more uniform moistening of the printing plates of the plate cylinder. As a result of an almost same peripheral speed of dampening roller and plate cylinder finds a pressure plate gentle Apply the dampening solution instead.

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

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.A four-roller dampening unit 1 according to the invention exists from a with a water-friendly material, e.g. B. Chromium or ceramics (e.g. aluminum oxide or chromium oxide) coated dip roller 2, one with rubber coated transfer roller 3, one in the axial direction reciprocating dampening roller 4 with a water-friendly coating, e.g. B. chrome or Ceramic, as well as from a rubber coated Moist application roller 5, which is connected to a plate cylinder 6 is frictionally adjustable, so that with approximately the same or opposite the plate cylinder 6 the peripheral speed is slightly lower, approx. with 99 to 99.5 percent. The rollers 3; 5 can too be coated with rubber-like plastic like this e.g. B is already known from inking rollers. The Dip roller 2 is partially immersed in a dampening solution box 7 with dampening solution 8 a. The plunger roller 2 is from an electric motor 12 with optionally changeable Speed driven. The dipping roller 2 is in contact with the transfer roller 3. The transfer roller 3 can, for. B. via a transfer roller pin fixed gear and a not shown gearbox with a Gear ratio of about 1 to 3 with one of the Dip roller 2 against higher peripheral speed are driven. It is also possible that Transfer roller 3 with a separate, not shown equip speed-controlled electric motor drive, which is the ratio of the peripheral speeds of Transfer roller 3 and dip roller 2 in a ratio of 1: 3 maintains.

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 with a Peripheral speed driven, which is less than the peripheral speed of the plate cylinder 6, the however proportional to the peripheral speed of the Plate cylinder 6 behaves. Conveniently there is such a drive from a single drive, for. B. a speed-controllable 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 is for the dampening roller 4 from a gear train of z. B. three Gears 17, 18; 19. The gear 21 is non-rotatable with a drive pin of the dampening roller 4 and that Gear 22 rotatably with a drive pin of the Plate cylinder 6 connected (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 stands with a drive gear 21 Wet roller 4, the gear 19 is with a Drive wheel 22 of the plate cylinder 6 in engagement. The gear wheel 22 of the plate cylinder 6 also acts the machine drive.

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 thus on the plate cylinder 6 employed that this frictionally from Plate cylinder 6 is driven, as already mentioned in the first embodiment in which Circumferential speed of the dampening roller 5 compared to the plate cylinder 6 low friction losses occur. It can on the elastic surface Dampening roller 5 a pressure strip in one Contact area 23 between the dampening roller 5 and the plate cylinder 6 with a width of five to eleven millimeters can be set. This will achieved that the dampening roller 5 at least approximately, the peripheral speed of the Plate cylinder 6 (with occupied printing plates), while in a touch area 24 between Wet roller 4 and the dampening roller 5 a Differential speed arises because the Dampening roller 4 a lower peripheral speed, e.g. B. 96 percent, compared to the dampening roller 5 has, the engagement 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 apply the dampening roller 5 additionally a hard one coated with plastic driven inking roller 26 of a not shown To adjust the inking unit frictionally, which means a speed-controllable geared motor 16 (Fig. 1) or driven by a gear 27 of gear 19 will (Fig. 2). The peripheral speed of the Ink roller 26 is the same or approximately the same Circumferential 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 dip roller 2 behaves like 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). At a preferred embodiment behave the Diameters d6 to d5 to d4 to d3 to d2 to each other as in 1 at 0.77 at 0.64 at 0.66 at 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 peripheral speeds of plate cylinder 6 too Moist application roller 5 to dampening roller 4 too Transfer roller 3 to immersion roller 2 behave like 1 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 of plate cylinder 6 too Moist application roller 5 to dampening roller 4 too Transfer roller 3 to dip roller 2 as 1 to 1 to 0.96 0.33 to 0.1. Every time the machine changes speed, d. H. the plate cylinder 6 is proportional Circumferential speed change of 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 storage of the cylinders, rollers, Gears are made in two, not shown Side frames. 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 dip roller 2 in one Dipping dampening solution box 7, but that Dampening solution with a known spray dampening system, e.g. B. with one according to DE 41 25 012 A1 on the dip roller 2 to apply.

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 use the plunger roller 2, Transfer roller 3, dampening roller 4 and Dampening roller 5 existing roller train through at least one further, between the dampening roller 4 and the dampening roller 5 arranged, to add water-friendly roller, not shown. This roller can be removed from the dampening roller 5 are frictionally driven so that a Touch 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 the Interposition of the roller mentioned then turn the directions of rotation of the dampening roller 4, the transfer roller 3 and the immersion roller 2 um.

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)

  1. Damping unit (1) for a rotary offset printing machine, comprising a dip roll (2) which can be driven at a selectable rotational speed and to which damping solution is applied, a plastic-coated transfer roll (3), a damping solution distributor roll (4) coated with a material with an affinity for damping solution, and a damping solution applicator roll (5) which interacts with a plate cylinder (6), the damping solution distributor roll (4) being driven at a peripheral speed which is in each case proportional to the peripheral speed of the plate cylinder (6) but not equal to it, characterized in that the peripheral speed of the damping solution distributor roll (4) is not equal to the respective peripheral speed of the transfer roll (3) and the dip roll (2).
  2. Damping unit according to Claim 1, characterized in that the relationships between the diameter (d6) of plate cylinder (6) and the diameter (d5) of the damping solution applicator roll (5), the diameter (d5) of the damping solution applicator roll (5) to the diameter (d4) of the damping solution distributor roll (4), the diameter (d4) of the damping solution distributor roll (4) and the diameter (d3) of the transfer roll (3), and the diameter (d3) of the transfer roll (3) to the diameter (d2) of the dip roll (2) are 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).
  3. Damping unit according to Claim 1, characterized in that the relationships between the peripheral speeds of plate cylinder (6) and the damping solution applicator cylinder (5), damping solution distributor roll (4), to the transfer roll (3) and to the dip roll (2) are 1:1:(0.4 to 0.99):(0.25 to 0.4):(0.08 to 0.18).
  4. Damping unit according to Claim 1, characterized in that at least one further roll (26) provided with a positive drive (27; 16) is arranged in the existing roll train, comprising the dip roll (2), transfer roll (3), damping solution distributor roll (4) and damping solution applicator roll (5), between the damping solution distributor roll (4) and the damping solution applicator roll (5).
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
DE4447178 1994-12-30
DE4447178A DE4447178A1 (en) 1994-12-30 1994-12-30 Dampening unit for a printing press

Publications (3)

Publication Number Publication Date
EP0719639A2 EP0719639A2 (en) 1996-07-03
EP0719639A3 EP0719639A3 (en) 1997-03-19
EP0719639B1 true 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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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
DE10035786A1 (en) * 2000-07-22 2002-02-07 Koenig & Bauer Ag dampening
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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US3106154A (en) * 1963-01-08 1963-10-08 Miller Printing Machinery Co Dampener for printing presses
US3517613A (en) * 1967-03-28 1970-06-30 Baeuerle Gmbh Mathias Offset printing machine with interchangeable application and etching rollers
US3673959A (en) * 1970-04-22 1972-07-04 North American Rockwell Dampening system for lithographic printing press
DE2745330A1 (en) * 1977-10-06 1979-07-26 Cigardi Omc Sa Roller system for offset printing machine - allows cylinder to be moistened either with water or with mixture of water and alcohol
GB2082121B (en) * 1980-08-14 1984-11-28 Komori Printing Mach Water supply apparatus for printing press
JPS57123061A (en) * 1981-01-22 1982-07-31 Komori Printing Mach Co Ltd Damping device for press
DE3336875A1 (en) * 1983-10-11 1985-04-18 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach DEVICE FOR MOISTURIZING PRINTING PLATES IN ROTARY PRINTING MACHINES
JPH02130148A (en) * 1988-11-10 1990-05-18 Toshiba Mach Co Ltd Damping apparatus for printing press
FR2663588B1 (en) * 1990-06-21 1992-10-09 Marinoni Harris Sa FILM WETTING SYSTEM FOR ROTARY OFFSET PRESS.
JPH05360U (en) * 1991-06-20 1993-01-08 株式会社アツギユニシア Inner diameter clamp device
DE4125012A1 (en) * 1991-07-27 1993-01-28 Koenig & Bauer Ag DEVICE FOR MOISTURIZING CYLINDERS IN OFFSETROTATION PRINTING MACHINES

Also Published As

Publication number Publication date
DE59508003D1 (en) 2000-04-20
EP0719639A3 (en) 1997-03-19
US5649481A (en) 1997-07-22
EP0719639A2 (en) 1996-07-03
DE4447178A1 (en) 1996-07-04
JPH08230142A (en) 1996-09-10
JP3167606B2 (en) 2001-05-21

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