EP0657282A1 - Inking device - Google Patents

Inking device Download PDF

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Publication number
EP0657282A1
EP0657282A1 EP94118809A EP94118809A EP0657282A1 EP 0657282 A1 EP0657282 A1 EP 0657282A1 EP 94118809 A EP94118809 A EP 94118809A EP 94118809 A EP94118809 A EP 94118809A EP 0657282 A1 EP0657282 A1 EP 0657282A1
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EP
European Patent Office
Prior art keywords
ink
forme cylinder
printing
nozzles
cylinder
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
EP94118809A
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German (de)
French (fr)
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EP0657282B1 (en
Inventor
Werner Blim
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.)
Koenig and Bauer AG
Original Assignee
Albert Frankenthal AG
Koenig and Bauer Albert AG
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Publication of EP0657282A1 publication Critical patent/EP0657282A1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F35/00Cleaning arrangements or devices
    • B41F35/02Cleaning arrangements or devices for forme cylinders

Definitions

  • the invention relates to a device using fast-drying printing ink in a forme cylinder according to the preamble of claim 1.
  • a printing unit for performing a flying change of a text or image impression a so-called imprinter
  • two forme cylinders are provided, which can optionally be adjusted to an impression cylinder guiding the paper web.
  • An inking roller which supplies the printing plates of the forme cylinder with ink, can be adjusted to the forme cylinder in operation.
  • a hard screened roller is used as the inking roller, which works against soft printing forms applied to the forme cylinder.
  • a disadvantage of this printing unit is that when using fast-drying printing ink, the residual ink remaining on the printing plates of the forme cylinder after the printing process dries up quickly and a dried ink layer is built up, which also accepts the newly applied printing ink, so that this leads to a loss in quality during printing leads.
  • the invention has for its object to provide a device using fast drying printing ink in forme cylinders, with the premature drying of the ink on the printing plates of a forme cylinder immediately after the current printing process is avoided.
  • an impression cylinder 3 is mounted, around which a paper web 4 coming from a printing unit is guided and forwarded.
  • the impression cylinder 3 rotates counterclockwise.
  • one of two side frame-fixed forme cylinders 7, 8 is adjustable, z. B. by means of eccentric bushings, not shown.
  • Each of the forme cylinders 7, 8 is provided with at least one pressure plate 9, 11.
  • the printing plate 9, 11 consists of a flexible material, as is known to be used in the flexographic printing process.
  • Below the forme cylinder 7, 8 is a hard, screened inking roller 12, 13, z. B. anilox roller side frame fixed and z. B.
  • inking rollers 12, 13 are each arranged by an ink supply device arranged below the inking roller 12, 13, e.g. B. chamber doctor blade 14, 16 supplied with printing ink.
  • the excess printing ink is collected by the inking roller 12, 13 in a trough 17, 18 after doctoring Returns 20, 24, and fed back to the respective chamber doctor blade 14, 16 via separate storage containers, not shown.
  • the inking roller 12, 13 is connected to the respective forme cylinder 7, 8. It is also possible to arrange the forme cylinders 7, 8 in a non-pivoting manner and instead to mount the impression cylinder 3 in a pivotable manner on the forme cylinder 7 or 8, for. B. by swinging.
  • the troughs 17, 18 are accommodated in a base frame 19, which in the middle has a support 21 which separates the troughs 17, 18 and extends in the axial direction and is limited in height below the axes of rotation 22, 23 and above the inking rollers 12, 13 .
  • the side frames 1, 2 are positively connected by means of reinforcements 25, 26, 27, 28, which extend in the axis-parallel direction, extend parallel to one another and are spaced apart from one another, which in turn can be positively connected by further reinforcements, also not shown, which also run vertically.
  • This scaffold is on the outside with sheets, for. B. made of stainless steel, so that a housing around the aforementioned cylinders and plates.
  • the paper web 4 and the forme cylinder 8 have the necessary slots 33, 34 made in the housing, designated overall by 32.
  • the support 21 extends in the axial direction of the cylinders in the direction of both side frames 1, 2.
  • the support 21 carries at its end remote from the base frame still further, arranged in the direction of the contact or pressure line between the impression cylinder 3 and the forme cylinder 7 and 8 respectively Covers 53, 54 so that the forme cylinder 7 with its ink transfer device 12, 14 and the forme cylinder 8 with its ink transfer device 13, 16 are each housed separately in the housing 32.
  • nozzles 36, 37 and 38, 39 fixed to the housing on both End faces 30, 35 of the housing 32 are arranged so that they radiate in the axial direction of the forme cylinders 7, 8.
  • the first, visible end face of the housing 32 is designated by 30.
  • the second, invisible end face of the housing 32 is designated 35.
  • Each nozzle 36 to 39 has a supply 41 for compressed air and a supply 42 for solvents, which of not shown systems are supplied.
  • the visible nozzles 36, 37 and the invisible nozzles likewise arranged on the second end face 35 have different jet widths, so that, for. B. the nozzle 36 can cover an area up to a quarter of the axial length and the nozzle 37 an area between a quarter and half of the axial length of the forme cylinder 7 depending on the pressure.
  • This ink transfer zone 40, 45 can run both linearly and in strips in the axial direction (FIG. 1).
  • the chambered doctor blade 14, 16 can each be arranged below the inking roller 12, 13.
  • the ink transfer device can also consist of a known inking roller which dips into an ink pan and which transfers the printing ink to a forme cylinder 7, 8 or the gravure printing ink onto a dye which also dips into the ink pan Gravure form cylinder distributed.
  • a separate known doctor device is provided.
  • the method of operation is as follows: the paper web 4 is guided around the counter-pressure cylinder 3 rotating counterclockwise and has contact with the printing plate 11 of the forme cylinder 8 in the region of the printing line 31, which can also be strip-shaped (FIG. 1). After the printing plate 11 has given the ink to the paper web 4, the printing plate 11 of the clockwise rotating forme cylinder 8 receives a precipitate from a color solvent-air mixture, e.g. B. a toluene-air mixture from the nozzles 38, 39 or from the opposite arranged on the front side 35 two invisible nozzles, so that a quick drying of the ink not removed from the paper web 4 on the printing plate 11 of the forme cylinder 8 avoided becomes.
  • a color solvent-air mixture e.g. B. a toluene-air mixture from the nozzles 38, 39 or from the opposite arranged on the front side 35 two invisible nozzles
  • the nozzles 38, 39 operate simultaneously with the forme cylinder 8 and the nozzles 36, 37 operate simultaneously with the forme cylinder 7. This also applies accordingly to the second nozzle pairs, not shown.
  • the aforementioned nozzles each radiate into a space 51, 52 which, viewed in the direction of rotation of the forme cylinders 7, 8, begins after the pressure line 29, 31 and is formed between the housing 32 and the outer surface of the forme cylinder 7, 8 and which is at the most at the ink transfer zone 40, 45 of the forme cylinder 7, 8 with the color transfer device 12, 14; 13, 16 ends.
  • each case it is also possible in each case to provide a plurality of nozzles arranged next to one another in the axial direction and directed towards the forme cylinders 7, 8 in the radial direction behind the pressure lines 29, 31, which nozzles can be designed as so-called flat jet nozzles. H. that these nozzles each spray a strip-shaped area.
  • the forme cylinders 7, 8 or inking rollers 12, 13 accommodated in the housing 32 are expediently accessible in the axial direction on the side remote from the cross member by means of pivotable covers 43, 44, 46, 47. In the closed state, these covers 43, 44, 46, 47 can be locked. Upper covers of the housing 32 are designated 48, 49 in total.
  • the side frames 1, 2 also provide forms part of the cover 32.
  • the solvent can also consist of water or alcohol.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)

Abstract

In an apparatus using quick-drying printing ink, premature drying of residual printing ink remaining on the printing plates (9, 11) of the forme cylinder (7, 8) following the printing operation is avoided. This takes place due to the fact that the forme cylinders, the ink transfer device and the ink feed device are sealed off relative to the back pressure cylinder. Subsequently, an ink-solvent/air mixture is introduced into a chamber which is located between a printing point and an ink transfer zone of the forme cylinder and extends in the axial direction of the forme cylinder. <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung unter Verwendung schnelltrocknender Druckfarbe bei einem Formzylinder entsprechend dem Oberbegriff des Patentanspruches 1.The invention relates to a device using fast-drying printing ink in a forme cylinder according to the preamble of claim 1.

Durch die DE 33 13 219 A1 ist eine Druckeinheit zur Durchführung eines fliegenden Wechsels eines Text- oder Bildeindruckes, ein sogenannter Imprinter, bekannt geworden. Bei dieser Druckeinheit sind zwei Formzylinder vorgesehen, die wahlweise an einen die Papierbahn führenden Gegendruckzylinder anstellbar sind. Eine die Druckplatten des Formzylinders mit Farbe versorgende Farbauftragswalze ist an den jeweils in Betrieb befindlichen Formzylinder anstellbar. Dabei wird u. a. als Farbauftragswalze eine harte gerasterte Walze verwendet, welche gegen auf den Formzylinder aufgebrachte weiche Druckformen arbeitet.From DE 33 13 219 A1 a printing unit for performing a flying change of a text or image impression, a so-called imprinter, has become known. In this printing unit, two forme cylinders are provided, which can optionally be adjusted to an impression cylinder guiding the paper web. An inking roller, which supplies the printing plates of the forme cylinder with ink, can be adjusted to the forme cylinder in operation. Here u. a. a hard screened roller is used as the inking roller, which works against soft printing forms applied to the forme cylinder.

Nachteilig bei dieser Druckeinheit ist, daß bei der Verwendung von schnelltrocknender Druckfarbe die nach dem Druckvorgang auf den Druckplatten des Formzylinders noch verbliebene Restfarbe schnell eintrocknet und dadurch eine eingetrocknete Farbschicht aufgebaut wird, welche die neu aufgetragene Druckfarbe ebenfalls annimmt, so daß dies beim Drucken zu Qualitätsverlusten führt.A disadvantage of this printing unit is that when using fast-drying printing ink, the residual ink remaining on the printing plates of the forme cylinder after the printing process dries up quickly and a dried ink layer is built up, which also accepts the newly applied printing ink, so that this leads to a loss in quality during printing leads.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung unter Verwendung schnelltrocknender Druckfarbe bei Formzylindern zu schaffen, mit der ein vorzeitiges Antrocknen von auf den Druckplatten eines Formzylinders unmittelbar nach dem laufenden Druckvorgang nicht abgenommener Druckfarbe vermieden wird.The invention has for its object to provide a device using fast drying printing ink in forme cylinders, with the premature drying of the ink on the printing plates of a forme cylinder immediately after the current printing process is avoided.

Erfindungsgemäß wird diese Aufgabe verfahrensmäßig durch die Merkmale des kennzeichnenden Teils des Patentanspruches 1 gelöstAccording to the invention, this object is achieved procedurally by the features of the characterizing part of patent claim 1

Durch die Erfindung werden insbesondere nachfolgende Vorteile erzielt: Durch das Besprühen der Druckplatten des jeweils in Betrieb befindlichen Formzylinders mit einem Farblösungsmittel-Luft-Gemisch auf dem Weg von der Drucklinie bis zur Wiedereinfärbung bzw. zum neuen Farbauftrag wird ein Antrocknen von auf den Druckplatten verbliebenen Restmengen, d. h. der nicht abgenommenen Druckfarbe vermieden, so daß dadurch ein für die Druckqualität schädlicher Aufbau von Restfarbe vermieden wird.The following advantages are achieved in particular by the invention: spraying the printing plates of the forme cylinder currently in operation with a color solvent-air mixture on the way from the printing line to re-inking or new ink application dries up any remaining amounts on the printing plates , d. H. the ink not removed is avoided, so that a build-up of residual ink which is harmful to the print quality is avoided.

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird im folgenden näher beschrieben. Es zeigen

Fig. 1
eine schematische Seitenansicht eines Imprinters mit einer Vorrichtung zur Durchführung des Verfahrens,
Fig. 2
einen Schnitt II - II nach Fig. 1.
An embodiment of the invention is shown in the drawings and will be described in more detail below. Show it
Fig. 1
is a schematic side view of an imprinter with a device for carrying out the method,
Fig. 2
a section II - II of FIG. 1st

In einem Seitengestell 1, 2 einer Druckeinheit zur Durchführung eines fliegenden Wechsels eines Text- oder Bildeindruckes (Imprinter) ist ein Gegendruckzylinder 3 gelagert, um welchen eine von einen Druckwerk kommende Papierbahn 4 geführt und weitergeleitet wird. Der Gegendruckzylinder 3 dreht sich dabei im Gegenuhrzeigersinn. An den Gegendruckzylinder 3 ist wahlweise einer von zwei seitengestellfest gelagerten Formzylindern 7, 8 anstellbar, z. B. mittels nicht dargestellter Exzenterbuchsen. Jeder der Formzylinder 7, 8 ist zumindest mit einer Druckplatte 9, 11 versehen. Die Druckplatte 9, 11 besteht aus einem flexiblen Material, so wie dies beim Flexodruckverfahren bekanntermaßen angewendet wird. Unterhalb des Formzylinders 7, 8 ist jeweils eine harte, gerasterte Farbauftragswalze 12, 13, z. B. Aniloxwalze seitengestellfest und z. B. mittels Exzenterbuchsen an den Formzylinder 7, 8 anstellbar gelagert. Diese Farbauftragswalzen 12, 13 werden jeweils von einer unterhalb der Farbauftragswalze 12, 13 angeordneten Farbzuführeinrichtung, z. B. Kammerrakel 14, 16 mit Druckfarbe versorgt. Die überschüssige Druckfarbe wird nach dem Abrakeln von der Farbauftragswalze 12, 13 jeweils in einer Wanne 17, 18 aufgefangen, über Rückläufe 20, 24, und über nicht dargestellte separate Vorratsbehälter der jeweiligen Kammerrakel 14, 16 wieder zugeführt. Die Farbauftragswalze 12, 13 steht mit dem jeweiligen Formzylinder 7, 8 in Verbindung. Es ist auch möglich, die Formzylinder 7, 8 nicht schwenkbar anzuordnen und dafür den Gegendruckzylinder 3 wahlweise an den Formzylinder 7 oder 8 schwenkbar zu lagern, z. B. mittels Schwingen. Die Wannen 17, 18 sind in einem Grundgestell 19 aufgenommen, welches mittig eine die Wannen 17, 18 trennende, sich in axialer Richtung erstreckende Stütze 21 aufweist, welche in ihrer Höhe unterhalb der Rotationsachsen 22, 23 und oberhalb der Farbauftragswalzen 12, 13 begrenzt ist. Die Seitengestelle 1, 2 sind formschlüssig mittels sich in achsparalleler Richtung erstreckender, parallel zueinander verlaufender, voneinander beabstandeter Verstärkungen 25, 26, 27, 28 verbunden, welche wiederum durch nicht dargestellte weitere, auch senkrecht verlaufende Verstärkungen formschlüssig verbunden sein können. Somit entsteht ein Gerüst, welches die Formzylinder 7, 8 sowie die Farbauftragswalzen 12, 13 umgibt. Dieses Gerüst ist an seiner Außenseite mit Blechen, z. B. aus nichtrostendem Stahl verkleidet, so daß ein Gehäuse um vorgenannte Zylinder und Platten entsteht. Lediglich im Bereich einer Berührungslinie bzw. Drucklinie 29 zwischen dem Formzylinder 7 und den Gegendruckzylinder 3 mit der Papierbahn 4 sowie alternativ im Bereich einer Berührungslinie bzw. Drucklinie 31 des Gegendruckzylinders 3 mit der Papierbahn 4 sowie dem Formzylinder 8 sind notwendige Schlitze 33, 34 in das insgesamt mit 32 bezeichnete Gehäuse eingebracht. Die Stütze 21 erstreckt sich in axialer Richtung zu den Zylindern in Richtung beider Seitengestelle 1, 2. Die Stütze 21 trägt an ihrem grundgestellfernen Ende noch weitere, in Richtung der Berührungs- bzw. Drucklinie zwischen dem Gegendruckzylinder 3 und dem Formzylinder 7 bzw. 8 angeordnete Abdeckungen 53, 54, so daß der Formzylinder 7 mit seiner Farbübertragungseinrichtung 12, 14 sowie der Formzylinder 8 mit seiner Farbübertragungseinrichtung 13, 16 jeweils separat im Gehäuse 32 untergebracht sind.In a side frame 1, 2 of a printing unit for carrying out a flying change of a text or image impression (imprinter), an impression cylinder 3 is mounted, around which a paper web 4 coming from a printing unit is guided and forwarded. The impression cylinder 3 rotates counterclockwise. On the impression cylinder 3 one of two side frame-fixed forme cylinders 7, 8 is adjustable, z. B. by means of eccentric bushings, not shown. Each of the forme cylinders 7, 8 is provided with at least one pressure plate 9, 11. The printing plate 9, 11 consists of a flexible material, as is known to be used in the flexographic printing process. Below the forme cylinder 7, 8 is a hard, screened inking roller 12, 13, z. B. anilox roller side frame fixed and z. B. adjustable by means of eccentric bushings on the forme cylinder 7, 8. These inking rollers 12, 13 are each arranged by an ink supply device arranged below the inking roller 12, 13, e.g. B. chamber doctor blade 14, 16 supplied with printing ink. The excess printing ink is collected by the inking roller 12, 13 in a trough 17, 18 after doctoring Returns 20, 24, and fed back to the respective chamber doctor blade 14, 16 via separate storage containers, not shown. The inking roller 12, 13 is connected to the respective forme cylinder 7, 8. It is also possible to arrange the forme cylinders 7, 8 in a non-pivoting manner and instead to mount the impression cylinder 3 in a pivotable manner on the forme cylinder 7 or 8, for. B. by swinging. The troughs 17, 18 are accommodated in a base frame 19, which in the middle has a support 21 which separates the troughs 17, 18 and extends in the axial direction and is limited in height below the axes of rotation 22, 23 and above the inking rollers 12, 13 . The side frames 1, 2 are positively connected by means of reinforcements 25, 26, 27, 28, which extend in the axis-parallel direction, extend parallel to one another and are spaced apart from one another, which in turn can be positively connected by further reinforcements, also not shown, which also run vertically. This creates a framework that surrounds the forme cylinders 7, 8 and the inking rollers 12, 13. This scaffold is on the outside with sheets, for. B. made of stainless steel, so that a housing around the aforementioned cylinders and plates. Only in the area of a line of contact or pressure line 29 between the forme cylinder 7 and the impression cylinder 3 with the paper web 4 and alternatively in the area of a line of contact or pressure line 31 of the impression cylinder 3 with the The paper web 4 and the forme cylinder 8 have the necessary slots 33, 34 made in the housing, designated overall by 32. The support 21 extends in the axial direction of the cylinders in the direction of both side frames 1, 2. The support 21 carries at its end remote from the base frame still further, arranged in the direction of the contact or pressure line between the impression cylinder 3 and the forme cylinder 7 and 8 respectively Covers 53, 54 so that the forme cylinder 7 with its ink transfer device 12, 14 and the forme cylinder 8 with its ink transfer device 13, 16 are each housed separately in the housing 32.

In Drehrichtung des jeweiligen Formzylinders 7, 8 gesehen, hinter der jeweiligen Berührungslinie, d. h. Drucklinie 29, 31 des Gegendruckzylinders 3 mit dem ersten Formzylinder 7 bzw. mit dem zweiten Formzylinder 8, sind gehäusefeste Düsen 36, 37 bzw. 38, 39 jeweils an beiden Stirnseiten 30, 35 des Gehäuses 32 so angeordnet, daß diese in axialer Richtung der Formzylinder 7, 8 strahlen. Dabei ist die erste, sichtbare Stirnseite des Gehäuses 32 mit 30 bezeichnet. Die zweite, unsichtbare Stirnseite des Gehäuses 32 ist mit 35 bezeichnet. Es sind also pro Formzylinder 7, 8 jeweils vier Düsen vorgesehen, von denen jeweils zwei Düsen weder dargestellt noch bezeichnet sind. Jede Düse 36 bis 39 weist eine Zuführung 41 für Druckluft und eine Zuführung 42 für Lösungsmittel auf, welche von nicht dargestellten Anlagen zugeführt werden. Dabei weisen die sichtbaren Düsen 36, 37 sowie die ebenfalls auf der zweiten Stirnseite 35 angeordneten unsichtbaren Düsen verschiedene Strahlweiten auf, so daß z. B. die Düse 36 einen Bereich bis zu einem Viertel der axialen Länge und die Düse 37 einen Bereich zwischen einem Viertel und der Hälfte der axialen Länge des Formzylinders 7 druckabhängig bestreichen kann. Das Gleiche gilt für die an der zweiten Stirnseite 35 angeordneten Düsen, so daß die gesamte axiale Länge des Formzylinders 7 in einem gekapselten Bereich hinter der Drucklinie 29 besprüht werden kann. Das Gleiche gilt für die sichtbaren Düsen 38, 39 sowie für die nicht sichtbar angeordneten Düsen des Formzylinders 8. Dem Formzylinder 7, 8 wird mit der aus Farbauftragswalze 12, 13 und Kammerrakel 14, 16 bestehenden Farbübertragungseinrichtung an einer Farbübertragungszone 40, 45 zwischen Farbauftragswalze 12, 13 und Formzylinder 7, 8 Druckfarbe übergeben. Diese Farbübertragungszone 40, 45 kann sowohl linienförmig als auch streifenförmig in axialer Richtung verlaufen (Fig. 1). Die Kammerrakel 14, 16 kann dabei jeweils unterhalb der Farbauftragswalze 12, 13 angeordnet sein.Seen in the direction of rotation of the respective forme cylinder 7, 8, behind the respective contact line, ie pressure line 29, 31 of the impression cylinder 3 with the first forme cylinder 7 and with the second forme cylinder 8, there are nozzles 36, 37 and 38, 39 fixed to the housing on both End faces 30, 35 of the housing 32 are arranged so that they radiate in the axial direction of the forme cylinders 7, 8. The first, visible end face of the housing 32 is designated by 30. The second, invisible end face of the housing 32 is designated 35. There are therefore four nozzles per forme cylinder 7, 8, of which two nozzles are neither shown nor labeled. Each nozzle 36 to 39 has a supply 41 for compressed air and a supply 42 for solvents, which of not shown systems are supplied. The visible nozzles 36, 37 and the invisible nozzles likewise arranged on the second end face 35 have different jet widths, so that, for. B. the nozzle 36 can cover an area up to a quarter of the axial length and the nozzle 37 an area between a quarter and half of the axial length of the forme cylinder 7 depending on the pressure. The same applies to the nozzles arranged on the second end face 35, so that the entire axial length of the forme cylinder 7 can be sprayed in an encapsulated area behind the pressure line 29. The same applies to the visible nozzles 38, 39 as well as to the nozzles of the forme cylinder 8 which are arranged so as not to be visible , 13 and forme cylinders 7, 8 transfer printing ink. This ink transfer zone 40, 45 can run both linearly and in strips in the axial direction (FIG. 1). The chambered doctor blade 14, 16 can each be arranged below the inking roller 12, 13.

Die Farbübertragungseinrichtung kann jedoch auch aus einer in eine Farbwanne eintauchenden bekannten Einfärbewalze bestehen, die die Druckfarbe auf einen Formzylinder 7, 8 überträgt bzw. die Tiefdruckfarbe auf einem ebenfalls in die Farbwanne eintauchenden Tiefdruck-Formzylinder verteilt. Dabei ist eine separate bekannte Rakeleinrichtung vorgesehen.However, the ink transfer device can also consist of a known inking roller which dips into an ink pan and which transfers the printing ink to a forme cylinder 7, 8 or the gravure printing ink onto a dye which also dips into the ink pan Gravure form cylinder distributed. A separate known doctor device is provided.

Die Funktionsweise ist wie folgt: Die Papierbahn 4 wird um den sich im Gegenuhrzeigersinn drehenden Gegendruckzylinder 3 herumgeführt und hat mit der Druckplatte 11 des Formzylinders 8 im Bereich der Drucklinie 31, welche auch streifenförmig ausgebildet sein kann, Kontakt (Fig. 1). Nach der Farbabgabe der Druckplatte 11 an die Papierbahn 4 erhält die Druckplatte 11 des sich im Uhrzeigersinn drehenden Formzylinders 8 einen Niederschlag aus einem Farblösungsmittel-Luft-Gemisch, z. B. einem Toluol-Luft-Gemisch aus den Düsen 38, 39 bzw. aus den entgegengesetzt auf der Stirnseite 35 angeordneten beiden nicht sichtbaren Düsen, so daß eine schnelle Antrocknung der von der Papierbahn 4 nicht abgenommenen Druckfarbe auf der Druckplatte 11 des Formzylinders 8 vermieden wird. Die Düsen 38, 39 sind gleichzeitig mit dem Formzylinder 8 in Betrieb und die Düsen 36, 37 sind gleichzeitig mit dem Formzylinder 7 in Betrieb. Dies gilt entsprechend auch für die nicht dargestellten zweiten Düsenpaare. Dabei strahlen die vorgenannten Düsen jeweils in einen Raum 51, 52, welcher in Drehrichtung der Formzylinder 7, 8 gesehen nach der Drucklinie 29, 31 beginnt und zwischen dem Gehäuse 32 und der Mantelfläche des Formzylinders 7, 8 gebildet wird und welcher maximal an der Farbübertragungszone 40, 45 des Formzylinders 7, 8 mit der Farbübertragungseinrichtung 12, 14; 13, 16 endet.The method of operation is as follows: the paper web 4 is guided around the counter-pressure cylinder 3 rotating counterclockwise and has contact with the printing plate 11 of the forme cylinder 8 in the region of the printing line 31, which can also be strip-shaped (FIG. 1). After the printing plate 11 has given the ink to the paper web 4, the printing plate 11 of the clockwise rotating forme cylinder 8 receives a precipitate from a color solvent-air mixture, e.g. B. a toluene-air mixture from the nozzles 38, 39 or from the opposite arranged on the front side 35 two invisible nozzles, so that a quick drying of the ink not removed from the paper web 4 on the printing plate 11 of the forme cylinder 8 avoided becomes. The nozzles 38, 39 operate simultaneously with the forme cylinder 8 and the nozzles 36, 37 operate simultaneously with the forme cylinder 7. This also applies accordingly to the second nozzle pairs, not shown. The aforementioned nozzles each radiate into a space 51, 52 which, viewed in the direction of rotation of the forme cylinders 7, 8, begins after the pressure line 29, 31 and is formed between the housing 32 and the outer surface of the forme cylinder 7, 8 and which is at the most at the ink transfer zone 40, 45 of the forme cylinder 7, 8 with the color transfer device 12, 14; 13, 16 ends.

Es ist auch möglich, jeweils mehrere, in axialer Richtung nebeneinander angeordnete, auf die Formzylinder 7, 8 in radialer Richtung gerichtete Düsen hinter den Drucklinien 29, 31 vorzusehen, die als sogenannte Flachstrahldüsen ausgebildet sein können, d. h. daß diese Düsen jeweils einen streifenförmigen Bereich besprühen.It is also possible in each case to provide a plurality of nozzles arranged next to one another in the axial direction and directed towards the forme cylinders 7, 8 in the radial direction behind the pressure lines 29, 31, which nozzles can be designed as so-called flat jet nozzles. H. that these nozzles each spray a strip-shaped area.

Es besteht auch die Möglichkeit, Druckfarbe auf Wasserbasis, sogenannte Flexodruckfarbe zu verwenden. Dabei wird als zugehöriges Farblösungsmittel Wasser, vorzugsweise sogenanntes "entspanntes" Wasser verwendet, welches dann ebenfalls durch die Düsen auf den genannten streifenförmigen Bereich des Formzylinders 7, 8 gesprüht wird, um ein schnelles Antrocknen derselben zu vermeiden. Sogenanntes "entspanntes" Wasser ist solches Wasser mit möglichst geringer Oberflächenspannung.There is also the possibility of using water-based printing ink, so-called flexographic printing ink. Water, preferably so-called "relaxed" water, is used as the associated color solvent, which is then also sprayed through the nozzles onto the said strip-shaped area of the forme cylinder 7, 8 in order to prevent the latter from drying quickly. So-called "relaxed" water is water with the lowest possible surface tension.

Zweckmäßigerweise sind die in dem Gehäuse 32 untergebrachten Formzylinder 7, 8 bzw. Farbauftragswalzen 12, 13 in axialer Richtung an der traversenfernen Seite mittels schwenkbarer Abdeckungen 43, 44, 46, 47 zugänglich. In geschlossenem Zustand sind diese Abdeckungen 43, 44, 46, 47 verriegelbar. Obere Abdeckungen des Gehäuses 32 sind insgesamt mit 48, 49 bezeichnet. Die Seitengestelle 1, 2 stellen ebenfalls einen Teil der Abdeckung 32 dar. Entsprechend der Art der Druckfarbe kann das Lösungsmittel auch aus Wasser oder aus Alkohol bestehen.The forme cylinders 7, 8 or inking rollers 12, 13 accommodated in the housing 32 are expediently accessible in the axial direction on the side remote from the cross member by means of pivotable covers 43, 44, 46, 47. In the closed state, these covers 43, 44, 46, 47 can be locked. Upper covers of the housing 32 are designated 48, 49 in total. The side frames 1, 2 also provide forms part of the cover 32. Depending on the type of printing ink, the solvent can also consist of water or alcohol.

TeilelisteParts list

11
SeitengestellSide frame
22nd
SeitengestellSide frame
33rd
GegendruckzylinderImpression cylinder
44th
PapierbahnPaper web
55
--
66
--
77
FormzylinderForme cylinder
88th
FormzylinderForme cylinder
99
Druckplatte (7)Pressure plate (7)
1010th
--
1111
Druckplatte (8)Pressure plate (8)
1212th
FarbauftragswalzeInking roller
1313
FarbauftragswalzeInking roller
1414
KammerrakelChamber squeegee
1515
--
1616
KammerrakelChamber squeegee
1717th
WanneTub
1818th
WanneTub
1919th
GrundgestellBase frame
2020th
Rücklauf (17)Return (17)
2121
Stützesupport
2222
Rotationsachse (7)Rotation axis (7)
2323
Rotationsachse (8)Rotation axis (8)
2424th
Rücklauf (18)Return (18)
2525th
Verstärkung (1, 2)Reinforcement (1, 2)
2626
Verstärkung (1, 2)Reinforcement (1, 2)
2727
Verstärkung (1, 2)Reinforcement (1, 2)
2828
Verstärkung (1, 2)Reinforcement (1, 2)
2929
Drucklinie (3, 4, 7)Print line (3, 4, 7)
3030th
Stirnseite, sichtbar (32)Face side, visible (32)
3131
Drucklinie (3, 4, 8)Print line (3, 4, 8)
3232
Gehäusecasing
3333
Schlitz (32)Slot (32)
3434
Schlitz (32)Slot (32)
3535
Stirnseite, unsichtbar (32)Front, invisible (32)
3636
Düsejet
3737
Düsejet
3838
Düsejet
3939
Düsejet
4040
Farbübertragungszone (12, 9)Ink transfer zone (12, 9)
4141
DruckluftzuführungCompressed air supply
4242
LösungsmittelzuführungSolvent supply
4343
Abdeckung (32)Cover (32)
4444
Abdeckung (32)Cover (32)
4545
Farbübertragungszone (13, 8)Ink transfer zone (13, 8)
4646
Abdeckung (32)Cover (32)
4747
Abdeckung (32)Cover (32)
4848
Abdeckung (32)Cover (32)
4949
Abdeckung (32)Cover (32)
5050
--
5151
Kammer (7)Chamber (7)
5252
Kammer (8)Chamber (8)
5353
Abdeckung (32)Cover (32)
5454
Abdeckung (32)Cover (32)

Claims (11)

Vorrichtung mit Formzylinder (7; 8), einem mit dem Formzylinder (7; 8) zusammenwirkenden Gegendruckzylinder (3) unter Verwendung schnelltrocknender Druckfarbe, wobei auf den Formzylinder (7; 8) mittels einer Farbauftragswalze (12; 13) und einer Farbzuführeinrichtung (14; 16) Druckfarbe aufgetragen wird, dadurch gekennzeichnet, daß der Formzylinder (7; 8), Farbauftragswalzen (12; 13) sowie die Farbzuführeinrichtung (14; 16) mit einem gemeinsamen Gehäuse (32) umgeben sind, daß in Drehrichtung des Formzylinders (7; 8) gesehen, nach einer im Bereich zwischen Drucklinie (29; 31) und Farbübertragungszone (40; 45) zwischen Formzylinder (7; 8) und Farbauftragwalze (12; 13) in dem Gehäuse (32) Düsen (36; 37; 38; 39) zum Versprühen eines Farblösungsmittel-Luft-Gemisches auf den Formzylinder (7; 8) vorgesehen sind.Device with forme cylinder (7; 8), an impression cylinder (3) interacting with the forme cylinder (7; 8) using quick-drying printing ink, with the forme cylinder (7; 8) using an inking roller (12; 13) and an ink feed device (14 ; 16) printing ink is applied, characterized in that the forme cylinder (7; 8), inking rollers (12; 13) and the ink supply device (14; 16) are surrounded by a common housing (32) that in the direction of rotation of the forme cylinder (7 ; 8) seen, after a in the area between the printing line (29; 31) and ink transfer zone (40; 45) between the forme cylinder (7; 8) and inking roller (12; 13) in the housing (32) nozzles (36; 37; 38 ; 39) are provided for spraying a color solvent-air mixture onto the forme cylinder (7; 8). Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Düsen (36; 37; 38; 39) jeweils an Stirnseiten (30, 35) des Gehäuses (32) angeordnet sind.Device according to claim 1, characterized in that the nozzles (36; 37; 38; 39) are each arranged on end faces (30, 35) of the housing (32). Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß mehrere Düsen (36; 37; 38; 39) in axialer Richtung des Formzylinders (7; 8) nebeneinander angeordnet sind.Apparatus according to claim 1, characterized in that a plurality of nozzles (36; 37; 38; 39) are arranged side by side in the axial direction of the forme cylinder (7; 8). Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Düsen (36; 37; 38; 39) als Flachstrahldüsen ausgebildet sind.Apparatus according to claim 3, characterized in that the nozzles (36; 37; 38; 39) are designed as flat jet nozzles. Vorrichtung nach den Ansprüchen 1 bis 4, dadurch gekennzeichnet, daß als Farbzuführeinrichtung (14; 16) auf die Farbauftragswalze (12; 13) eine in eine Farbwanne eintauchende Einfärbewalze vorgesehen ist.Device according to claims 1 to 4, characterized in that a coloring roller immersed in an ink pan is provided as the ink supply device (14; 16) on the ink application roller (12; 13). Vorrichtung nach den Ansprüchen 1 bis 4, dadurch gekennzeichnet, daß die Farbzuführeinrichtung (12, 14; 13, 16) aus einer Farbauftragswalze (12; 13) mit einer daran angeordneten Kammerrakel (14; 16) besteht.Device according to claims 1 to 4, characterized in that the ink supply device (12, 14; 13, 16) consists of an ink application roller (12; 13) with a chambered doctor blade (14; 16) arranged thereon. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die Farbauftragswalze (12; 13) als harte, gerasterte Aniloxwalze ausgebildet ist.Apparatus according to claim 6, characterized in that the ink application roller (12; 13) is designed as a hard, screened anilox roller. Vorrichtung nach den Ansprüchen 1 bis 7, dadurch gekennzeichnet, daß die auf dem Formzylinder (7; 8) befindliche Druckplatte (9, 11) als Flexodruckplatte ausgebildet ist.Device according to claims 1 to 7, characterized in that the printing plate (9, 11) located on the forme cylinder (7; 8) is designed as a flexographic printing plate. Vorrichtung nach den Ansprüchen 1 bis 8, dadurch gekennzeichnet, daß das Farblösungsmittel aus Toluol besteht.Device according to claims 1 to 8, characterized in that the color solvent consists of toluene. Vorrichtung nach den Ansprüchen 1 bis 8, dadurch gekennzeichnet, daß das Farblösungsmittel aus Alkohol besteht.Device according to claims 1 to 8, characterized characterized in that the color solvent consists of alcohol. Vorrichtung nach den Ansprüchen 1 bis 8, dadurch gekennzeichnet, daß das Farblösungsmittel aus Wasser besteht.Device according to claims 1 to 8, characterized in that the color solvent consists of water.
EP94118809A 1993-12-06 1994-11-30 Inking device Expired - Lifetime EP0657282B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4341534A DE4341534C2 (en) 1993-12-06 1993-12-06 Inking unit for a web-fed rotary printing press
DE4341534 1993-12-06

Publications (2)

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EP0657282A1 true EP0657282A1 (en) 1995-06-14
EP0657282B1 EP0657282B1 (en) 1998-04-15

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ID=6504290

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94118809A Expired - Lifetime EP0657282B1 (en) 1993-12-06 1994-11-30 Inking device

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US (1) US5503069A (en)
EP (1) EP0657282B1 (en)
JP (1) JP2564107B2 (en)
DE (2) DE4341534C2 (en)

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EP4400313A1 (en) * 2023-01-10 2024-07-17 Bobst Bielefeld GmbH Rotary printing press with humidifier unit and method for moistening a flexo plate

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US6739256B1 (en) * 2002-05-17 2004-05-25 Umetani Mfg. Co., Ltd. Method of ink agitation by ink aspiration
JP6912155B2 (en) * 2014-10-20 2021-07-28 三菱重工機械システム株式会社 Flexographic printing machine and box making machine
DE102017222700A1 (en) * 2017-07-17 2019-01-17 Heidelberger Druckmaschinen Ag Printing machine with twin printing unit and method for operating such a printing press
CN109454976A (en) * 2018-12-30 2019-03-12 杨立旭 Printing equipment and its application method

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Also Published As

Publication number Publication date
EP0657282B1 (en) 1998-04-15
DE4341534C2 (en) 1996-07-18
JP2564107B2 (en) 1996-12-18
DE4341534A1 (en) 1995-06-08
JPH07195656A (en) 1995-08-01
DE59405709D1 (en) 1998-05-20
US5503069A (en) 1996-04-02

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