EP1466729B1 - Cylinder for a printing machine and process for producing of cylinder - Google Patents

Cylinder for a printing machine and process for producing of cylinder Download PDF

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Publication number
EP1466729B1
EP1466729B1 EP04405171A EP04405171A EP1466729B1 EP 1466729 B1 EP1466729 B1 EP 1466729B1 EP 04405171 A EP04405171 A EP 04405171A EP 04405171 A EP04405171 A EP 04405171A EP 1466729 B1 EP1466729 B1 EP 1466729B1
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EP
European Patent Office
Prior art keywords
ink
roller
color
repellent
friendly
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
EP04405171A
Other languages
German (de)
French (fr)
Other versions
EP1466729A3 (en
EP1466729A2 (en
Inventor
Robert Langsch
Carlo Manta
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.)
Wifag Maschinenfabrik AG
Original Assignee
Wifag Maschinenfabrik AG
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Publication date
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Publication of EP1466729A2 publication Critical patent/EP1466729A2/en
Publication of EP1466729A3 publication Critical patent/EP1466729A3/en
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Publication of EP1466729B1 publication Critical patent/EP1466729B1/en
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Classifications

    • 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
    • B41F7/36—Inking-rollers serving also to apply ink repellants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/26—Construction of inking rollers
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N7/00—Shells for rollers of printing machines
    • B41N7/06—Shells for rollers of printing machines for inking rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N2207/00—Location or type of the layers in shells for rollers of printing machines
    • B41N2207/02—Top layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N2207/00—Location or type of the layers in shells for rollers of printing machines
    • B41N2207/04—Intermediate layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N2207/00—Location or type of the layers in shells for rollers of printing machines
    • B41N2207/10—Location or type of the layers in shells for rollers of printing machines characterised by inorganic compounds, e.g. pigments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N2207/00—Location or type of the layers in shells for rollers of printing machines
    • B41N2207/14—Location or type of the layers in shells for rollers of printing machines characterised by macromolecular organic compounds

Definitions

  • the present invention relates to a roller, in particular a roller, which can be used in a printing machine, for example in the inking or dampening unit, and to a method for producing such a roller.
  • FIG. 4 shows a roller pattern of a printing unit, through which a web B to be printed runs.
  • the railway B will be in the in FIG. 4 initially shown on a counter-pressure cylinder 1 ', at which a first blanket cylinder 2' and a second blanket cylinder 2 "rest and is further led to re-moistening via another impression cylinder 1, on which also a first blanket cylinder 2 and a second blanket cylinder 2" rest ,
  • the roller scheme will be described with reference to the structure of the printing unit used for re-wetting.
  • the dampening roller 11 is in contact with a rubbing roller 12, the so-called dampening driver.
  • this rubbing roller 12 is the wet transfer roller 13 and receives sprayed over a contactless dampening dampening solution.
  • the wet transfer roller 13, the rubbing roller 12 and the wet application roller 11 transfer the dampening solution to the plate cylinder 3, whereby you get the desired pre- or Nachfeuchtung.
  • the voltage applied to the plate cylinder 3 color applicator rollers 4 transfer color from the voltage applied to these first rubbing roller 5a, the first so-called ink driver.
  • the rubber roller 6a abuts on the ink driver 5a, which further bears against a second ink driver 5b, against which two further rubber rollers 6b and 6c abut.
  • the rubber roller 6c is applied to the ink film roller 7, at which in a known manner the ink duct 8 and the scoop roller 10 abut.
  • the ink fountain 5a is about the rubber rollers 6a, 6c, the other ink driver 5b, on the ink fountain roller 7, on the ink fountain roller 8, on which the color color meter, arranged in the ink knife bar 9, is metered and the scoop roller 10, which in the color immersed in the ink tray, dyed in a known manner.
  • An exemplary inking and dampening unit is in the DE 40 12 283 A1 shown by the applicant.
  • the reciprocating dampening driver 12 mixes the different colors used in two side-by-side webs, resulting in unsatisfactory printing results.
  • the EP 0 511 543 A1 discloses a method for producing a partially hydrophilic and partially oleophilic surface of an inking roller in which a hydrophilic material is introduced into recesses in an oleophilic metal layer of copper. The oleophilic surface portions are removed until the desired distance of oleophilic to hydrophilic surface is reached.
  • the US 4,860,652 discloses a roller having a surface of lipophilic material in which are provided cellular depressions coated, for example, with ceramic or tungsten carbide.
  • the roll according to the invention is used in the rewetting, in which there is a risk that color runs back into the dampening unit.
  • the roller according to the invention has at least two partial areas or surfaces which preferably extend around the center axis of the roller and which consist of a color-friendly material, wherein between the two circumferential partial areas or areas from color-friendly material at least one circumferential portion or a circumferential surface is arranged, which consists of an ink-repellent or ink-repellent material.
  • a color-friendly material wherein between the two circumferential partial areas or areas from color-friendly material at least one circumferential portion or a circumferential surface is arranged, which consists of an ink-repellent or ink-repellent material.
  • a circumferential surface may, for example, be annular or have one or more partial ring pieces, wherein the surface is advantageously designed according to the roll surface and is preferably arranged around the central axis of the roll and particularly advantageously has approximately the same curvature as the curvature of the adjacent roll surface.
  • a "color-friendly" in the context of the invention should have such physical and / or chemical properties that a roller coated with such a material can fulfill the function of a paint roller, so can absorb color.
  • a color-friendly material has a hydrophobic property.
  • an "ink-repellent" or “ink-repellent” material in the context of the invention should be a material which has such physical and / or chemical properties that the roller can perform a function as a dampening roller in a region coated with an ink-repellent material, ie absorb water can.
  • the ink-repellent material should have hydrophilic properties or be water-friendly.
  • a ceramic, copper, polyamide or Rilsan (R) is used as the color-friendly or hydrophobic material.
  • Chromium is advantageously used as an ink-repellent or water-friendly or hydrophilic material.
  • a plurality of regions or circumferential surfaces of color-friendly material are arranged on a roller according to the invention in the axial direction one behind the other, between each of which at least one region or a circumferential surface is arranged from a color-repellent or water-friendly material.
  • four color-friendly partial regions may be provided successively in the axial direction, which are separated from one another by three subregions of water-friendly or ink-repellent material.
  • the thickness of the color-friendly material is preferably in the range of 0.1 mm to 0.5 mm, and more preferably 0.3 mm.
  • the thickness of the ink repellent or water-friendly material is in the range of 0.01 mm to 0.10 mm, more preferably in the range of 0.02 mm to 0.05 mm and is advantageously 0.035 mm.
  • the width of a circumferential surface or a portion of color-friendly material is preferably about the width of a type area and is advantageously in the range of 25 to 35 cm.
  • the width of the portion of water-friendly material is slightly larger than the stroke of a distributor roller and is advantageously in the range of 18 to 26 mm and is advantageously 22 mm.
  • the invention relates to a color and / or dampening unit preferably for offset printing machines with at least one roller as described above.
  • the invention relates to a method for producing a roller as described above, wherein at least two approximately annular or partially annular structures of a color-friendly material and intervening at least one annular structure of a Farbabsto ⁇ enden material in the surface region or directly to a WalzenrohSystem formed the surface of the roller, so for example exposed, attached or coated thereon.
  • the roll according to the invention is produced by pre-processing a roll blank or pipe by turning to obtain a surface having a desired texture.
  • one or more subsections of color-friendly and ink-repellent or ink-repellent material can already be provided in the roll raw body. It is also possible that a color-friendly or ink-repellent material is applied to the WalzenrohMech at the desired locations.
  • the application of a color-friendly or ink-repellent material can be carried out, for example, by chromium plating, welding or by a coating method such as, for example, a plasma coating.
  • an area at the transition between color-friendly and ink-repellent or repellent materials or a marginal area can be sealed in order to prevent, for example, moisture from entering the roller.
  • FIG. 1 shows a sectional view of a portion of a roller according to the invention, wherein the structure of the roller is shown from the central axis to the surface.
  • the roller shown by way of example is subdivided into four sections of width Y, assigned to zones A to D, which each have approximately the same width and correspond approximately to a type area mirror.
  • a color-friendly or hydrophobic material 25, 33 such as ceramic, copper, polyamide or Rilsan (R) with a layer thickness of about 0.3 mm is attached to the surface.
  • the surface of the roller according to the invention is designed such that a color-friendly material which is assigned to the type area and a water-friendly material which lies between two adjacent color-friendly materials is arranged alternately over the surface corresponding more to a paper width B for the printing.
  • a dampening drive roller provided with such a surface, which is moved back and forth in the axial direction in the printing insert with a stroke of, for example, 20 mm, ensures that the color-friendly material assigned to the type area mirror the transfer of a color is possible and on the other hand prevented by lying between the areas of color-friendly material ink-repellent or water-friendly material that colors that run in adjacent zones next to each other, can mix.
  • the surface area of water-friendly material ensures a sufficient supply and discharge of water during operation and can thus carry away beyond the edge of a zone or a sentence mirror outgoing color and thus can prevent this color runs in an adjacent zone or an adjacent type area ,
  • FIG. 2 shows a first embodiment of a method according to the invention for producing a roll according to the invention.
  • the initial state designated 1 there is a roll raw body or tube 20, which is pre-machined by turning so that four circumferential recesses 21 are produced. Between each two recesses 21 is in each case a circumferential projection 22nd
  • each circumferential projection 22 is chrome plated and so a layer of chromium 23 applied.
  • a weld 24 is applied to produce a watertight seal at the edge of the chrome layer 23.
  • the weld 24 can be roughened to ensure better adhesion of the applied in step 4 color-friendly or hydrophobic coating 25.
  • a polyamide can be applied as a color-friendly layer 25. It is possible to perform a plasma coating to produce the color-friendly layer 25. Likewise, a hard chrome plating can be performed. Rilsan is advantageously applied as a color-friendly material 25 on the roller 20.
  • the color-friendly layer can be applied to the roller 20 either as a single layer or in multiple layers-in the exemplary embodiment, three layers.
  • step 5 the roller 20 produced by the processing steps 1 to 4 can be ground or turned to obtain a substantially planar surface with circumferential color-friendly portions 25 which are interrupted by circumferential ink-repellent or water-friendly portions 23 be separated.
  • FIG. 3 shows process steps for carrying out a second process according to the invention for producing the roll according to the invention.
  • step 1 a roll raw body 30 is processed by over-turning in the area indicated by the arrow to make the surface of the Walzenroh stressess 30 planar for the subsequent manufacturing process.
  • step 2 a recess 31 running around the central axis of the rolling raw body 30 is produced by piercing or another material-removing method.
  • step 3 a material 32 is applied to the recess 31 formed in step 2 by stainless welding.
  • step 4 the surface of the raw cylindrical body 30 pre-machined by steps 1 to 3 is made into a desired shape by pre-turning, the outer surface of the material 32 applied in step 3 being made planar and the width of this material 32 being planarized desired width is reduced.
  • a color-friendly material 33 such as Rilsan (R) is applied to the surface regions of the WalzenrohMechs 30, which adjoin the projecting portion of the material 32.
  • Rilsan R
  • one or more layers of the color-friendly material 33 may be applied.
  • the outermost surface of the material 32 embedded between the color-friendly material 33 is hard-chrome plated in step 6 to apply a chromium color-repellent layer 34, and subsequently the green-body 30 processed by steps 1-6 is ground in step 7 to obtain a substantially planar outer surface ,

Abstract

The roll for a printing machine comprises at least two axial sections (25, 33) consisting of a material wettable by dyes, and at least one intervening axial section (23, 34) consisting of a material repelling dyes. An independent claim is also included for a method for producing the proposed roll.

Description

Die vorliegende Erfindung bezieht sich auf eine Walze, insbesondere auf eine Walze, welche in einer Druckmaschine, zum Beispiel im Farb- oder Feuchtwerk verwendet werden kann und auf ein Verfahren zur Herstellung einer solchen Walze.The present invention relates to a roller, in particular a roller, which can be used in a printing machine, for example in the inking or dampening unit, and to a method for producing such a roller.

Figur 4 zeigt ein Walzenschema eines Druckwerks, durch welches eine zu bedruckende Bahn B läuft. Die Bahn B wird in der in Figur 4 gezeigten Anordnung zunächst über einen Gegendruckzylinder 1' geführt, an welchem ein erster Gummizylinder 2' und ein zweiter Gummizylinder 2" anliegen und wird weiter zur Nachfeuchtung über einen weiteren Gegendruckzylinder 1 geführt, an welchem ebenfalls ein erster Gummizylinder 2 und ein zweiter Gummizylinder 2" anliegen. Beispielhaft wird das Walzenschema anhand des zur Nachfeuchtung dienenden Aufbaus des Druckwerkes beschrieben. An dem an dem Gummizylinder anliegenden Plattenzylinder 3 liegt eine Feuchtauftragwalze 11 an. Die Feuchtauftragwalze 11 steht in Kontakt mit einer Reibwalze 12, dem sogenannten Feuchtreiber. An dieser Reibwalze 12 liegt die Feucht-Übertragwalze 13 an und erhält über ein kontaktloses Feuchtwerk das Feuchtmittel aufgesprüht. Die Feucht-Übertragwalze 13, die Reibwalze 12 und die Feucht-Auftragwalze 11 übertragen das Feuchtmittel auf den Plattenzylinder 3, wodurch man die gewünschte Vor- bzw. Nachfeuchtung erhält. FIG. 4 shows a roller pattern of a printing unit, through which a web B to be printed runs. The railway B will be in the in FIG. 4 initially shown on a counter-pressure cylinder 1 ', at which a first blanket cylinder 2' and a second blanket cylinder 2 "rest and is further led to re-moistening via another impression cylinder 1, on which also a first blanket cylinder 2 and a second blanket cylinder 2" rest , By way of example, the roller scheme will be described with reference to the structure of the printing unit used for re-wetting. At the voltage applied to the rubber cylinder plate cylinder 3 is a dampening roller 11 at. The dampening roller 11 is in contact with a rubbing roller 12, the so-called dampening driver. At this rubbing roller 12 is the wet transfer roller 13 and receives sprayed over a contactless dampening dampening solution. The wet transfer roller 13, the rubbing roller 12 and the wet application roller 11 transfer the dampening solution to the plate cylinder 3, whereby you get the desired pre- or Nachfeuchtung.

Die an dem Plattenzylinder 3 anliegenden Farb-Auftragwalzen 4 übertragen Farbe von der an diesen anliegenden ersten Reibwalze 5a, dem ersten sogenannten Farbreiber. An dem Farbreiber 5a liegt die Gummiwalze 6a an, welche weiter an einem zweiten Farbreiber 5b anliegt, an welchem zwei weitere Gummiwalzen 6b und 6c anliegen. Die Gummiwalze 6c liegt an der Farbfilmwalze 7 an, an welcher auf bekannte Weise der Farbduktor 8 und die Schöpfwalze 10 anliegen. Der Farbreiber 5a wird über die Gummiwalzen 6a, 6c, den weiteren Farbreiber 5b, über die Farbfilmwalze 7, über den Farbduktor 8, auf welchem die Farbe über Farbmesser, angeordnet im Farbmesserbalken 9, dosiert wird und über die Schöpfwalze 10, welche in die Farbe in der Farbwanne eintaucht, in bekannter Weise eingefärbt.The voltage applied to the plate cylinder 3 color applicator rollers 4 transfer color from the voltage applied to these first rubbing roller 5a, the first so-called ink driver. The rubber roller 6a abuts on the ink driver 5a, which further bears against a second ink driver 5b, against which two further rubber rollers 6b and 6c abut. The rubber roller 6c is applied to the ink film roller 7, at which in a known manner the ink duct 8 and the scoop roller 10 abut. The ink fountain 5a is about the rubber rollers 6a, 6c, the other ink driver 5b, on the ink fountain roller 7, on the ink fountain roller 8, on which the color color meter, arranged in the ink knife bar 9, is metered and the scoop roller 10, which in the color immersed in the ink tray, dyed in a known manner.

Ein beispielhaftes Farb- und Feuchtwerk ist in der DE 40 12 283 A1 der Anmelderin gezeigt.An exemplary inking and dampening unit is in the DE 40 12 283 A1 shown by the applicant.

Aus der DE 40 122 83 A1 ist bekannt, dass Reibwalzen eine Oberfläche aus Kupfer haben, um eine farbfreundliche Oberfläche aufzuweisen.From the DE 40 122 83 A1 It is known that friction rollers have a surface of copper to have a color-friendly surface.

Werden zwei verschiedene Farben auf zwei nebeneinanderliegende Bahnen gedruckt, so kann es vorkommen, dass der sich hin und her bewegende Feuchtreiber 12 die in zwei nebeneinanderlaufenden Bahnen verwendeten, unterschiedlichen Farben vermischt, was zu unbefriedigenden Druckergebnissen führt.If two different colors are printed on two adjacent webs, it may happen that the reciprocating dampening driver 12 mixes the different colors used in two side-by-side webs, resulting in unsatisfactory printing results.

Die EP 0 511 543 A1 offenbart ein Verfahren zur Herstellung einer teilweise hydrophilen und teilweise oleophilen Oberfläche einer Farbwalze, bei dem in Vertiefungen in einer oleophilen Metallschicht aus Kupfer ein hydrophiles Material eingebracht wird. Die oleophilen Flächenanteile werden soweit abgetragen, bis der Soll-Abstand von oleophiler zu hydrophiler Oberfläche erreicht ist.The EP 0 511 543 A1 discloses a method for producing a partially hydrophilic and partially oleophilic surface of an inking roller in which a hydrophilic material is introduced into recesses in an oleophilic metal layer of copper. The oleophilic surface portions are removed until the desired distance of oleophilic to hydrophilic surface is reached.

Die US 4,860,652 offenbart eine Walze mit einer Oberfläche aus lipophilem Material, in welcher zellenförmige Vertiefungen vorgesehen sind, welche zum Beispiel mit Keramik oder Wolframkarbid beschichtet sind.The US 4,860,652 discloses a roller having a surface of lipophilic material in which are provided cellular depressions coated, for example, with ceramic or tungsten carbide.

Es ist eine Aufgabe der vorliegenden Erfindung eine Walze, insbesondere für eine Druckmaschine vorzuschlagen, welche ein Vermischen von Farben bei nebeneinanderlaufenden Bahnen verringert oder verhindert.It is an object of the present invention to provide a roller, in particular for a printing press, which reduces or prevents mixing of colors in adjacent running webs.

Diese Aufgabe wird durch eine Walze gemäß Patentanspruch 1 gelöst. Vorteilhafte Ausführungsformen ergeben sich aus den Unteransprüchen.This object is achieved by a roller according to claim 1. Advantageous embodiments will be apparent from the dependent claims.

Bevorzugt wird die erfindungsgemäße Walze in der Nachfeuchtung eingesetzt, bei welcher die Gefahr besteht, dass Farbe in das Feuchtwerk zurückläuft.Preferably, the roll according to the invention is used in the rewetting, in which there is a risk that color runs back into the dampening unit.

Die erfindungsgemäße Walze weist mindestens zwei bevorzugt um die Mittelachse der Walze umlaufende Teilbereiche oder Flächen auf, welche aus einem farbfreundlichen Material bestehen, wobei zwischen den zwei umlaufenden Teilbereichen oder Flächen aus farbfreundlichem Material mindestens ein umlaufender Teilbereich bzw. eine umlaufende Fläche angeordnet ist, welche aus einem farbabstoßenden oder farbabweisenden Material besteht. Unter den Begriffen "umlaufender Teilbereich" oder "umlaufende Fläche" soll im Sinn dieser Anmeldung ein Bereich einer Oberfläche einer Walze verstanden werden, welcher sich vollständig oder teilweise um den Umfang der Walze erstreckt. Eine umlaufende Fläche kann zum Beispiel ringförmig ausgebildet sein oder einen oder mehrere Teilringstücke aufweisen, wobei die Oberfläche vorteilhaft entsprechend der Walzenoberfläche ausgebildet ist und bevorzugt um die Mittelachse der Walze herum angeordnet ist und besonders vorteilhaft etwa die gleiche Krümmung aufweist wie die Krümmung der benachbarten Walzenoberfläche. Erfindungsgemäß sind somit nach einer Ausführungsform in axialer Richtung einer Walze eine erste umlaufende Fläche oder ein ringförmiges Element aus einem farbfreundlichen Material, ein daran anschließendes ringförmiges Element aus einem farbabstoßenden oder farbabweisenden Material und daran anschließend ein zweites ringförmiges Element aus einem farbfreundlichen Material angeordnet, wodurch die beiden ringförmigen Elemente aus farbfreundlichem Material durch das ringförmige Element aus farbabstoßendem Material getrennt sind.The roller according to the invention has at least two partial areas or surfaces which preferably extend around the center axis of the roller and which consist of a color-friendly material, wherein between the two circumferential partial areas or areas from color-friendly material at least one circumferential portion or a circumferential surface is arranged, which consists of an ink-repellent or ink-repellent material. For the purposes of this application, the terms "peripheral partial area" or "circumferential area" are to be understood as meaning an area of a surface of a roller which extends completely or partially around the circumference of the roller. A circumferential surface may, for example, be annular or have one or more partial ring pieces, wherein the surface is advantageously designed according to the roll surface and is preferably arranged around the central axis of the roll and particularly advantageously has approximately the same curvature as the curvature of the adjacent roll surface. According to an embodiment in the axial direction of a roller according to one embodiment, a first circumferential surface or an annular element made of a color-friendly material, an adjoining annular element made of a ink repellent or ink repellent material and then a second annular element made of a color-friendly material, whereby the both annular elements of color-friendly material are separated by the annular element of ink repellent material.

Ein im Sinne der Erfindung "farbfreundliches" Material soll zum Beispiel solche physikalischen und/oder chemischen Eigenschaften aufweisen, dass eine mit einem solchen Material beschichtete Walze die Funktion als Farbwalze erfüllen kann, also Farbe aufnehmen kann. Bevorzugt weist ein farbfreundliches Material eine hydrophobe Eigenschaft auf. Entsprechend soll ein im Sinne der Erfindung "farbabstoßendes" oder "farbabweisendes" Material ein Material sein, welches solche physikalischen und/oder chemischen Eigenschaften aufweist, dass die Walze in einem mit einem farbabstoßenden Material beschichteten Bereich eine Funktion als Feuchtwalze erfüllen kann, also Wasser aufnehmen kann. Bevorzugt soll das farbabstoßende Material hydrophile Eigenschaften haben oder wasserfreundlich sein.A "color-friendly" in the context of the invention, for example, should have such physical and / or chemical properties that a roller coated with such a material can fulfill the function of a paint roller, so can absorb color. Preferably, a color-friendly material has a hydrophobic property. Accordingly, an "ink-repellent" or "ink-repellent" material in the context of the invention should be a material which has such physical and / or chemical properties that the roller can perform a function as a dampening roller in a region coated with an ink-repellent material, ie absorb water can. Preferably, the ink-repellent material should have hydrophilic properties or be water-friendly.

Bevorzugt wird als farbfreundliches oder hydrophobes Material eine Keramik, Kupfer, Polyamid oder Rilsan (R) verwendet.Preferably, a ceramic, copper, polyamide or Rilsan (R) is used as the color-friendly or hydrophobic material.

Vorteilhaft wird als farbabstoßendes bzw. wasserfreundliches oder hydrophiles Material Chrom verwendet.Chromium is advantageously used as an ink-repellent or water-friendly or hydrophilic material.

Verschiedene farbfreundliche und farbabstoßende Materialien sind im Stand der Technik bekannt. Beispielhaft wird auf die Lehren der EP 0 203 342 A2 und der DE 196 53 911 A1 verwiesen, deren Offenbarung bezüglich Materialien zur Beschichtung von Oberflächen von Walzen in diese Anmeldung aufgenommen wird.Various color-friendly and ink-repellent materials are known in the art. An example is given to the teachings of EP 0 203 342 A2 and the DE 196 53 911 A1 The disclosure of which is related to materials for coating surfaces of rolls in this application.

Vorteilhaft sind an einer erfindungsgemäßen Walze in axialer Richtung hintereinander mehrere Bereiche oder umlaufende Flächen aus farbfreundlichem Material angeordnet, zwischen welchen jeweils mindestens ein Bereich oder eine umlaufende Fläche aus einem farbabstoßenden oder wasserfreundlichen Material angeordnet ist. So können bei einer Walze gemäß einer Ausführungsform zum Beispiel vier farbfreundliche Teilbereiche in axialer Richtung aufeinanderfolgend vorgesehen sein, welche durch drei Teilbereiche aus wasserfreundlichem oder farbabweisendem Material voneinander getrennt sind.Advantageously, a plurality of regions or circumferential surfaces of color-friendly material are arranged on a roller according to the invention in the axial direction one behind the other, between each of which at least one region or a circumferential surface is arranged from a color-repellent or water-friendly material. Thus, in a roller according to one embodiment, for example, four color-friendly partial regions may be provided successively in the axial direction, which are separated from one another by three subregions of water-friendly or ink-repellent material.

Die Dicke des farbfreundlichen Materials liegt bevorzugt in dem Bereich von 0,1 mm bis 0,5 mm und beträgt besonders bevorzugt 0,3 mm. Vorteilhaft liegt die Dicke des farbabweisenden oder wasserfreundlichen Materials im Bereich von 0,01 mm bis 0,10 mm, weiter bevorzugt im Bereich von 0,02 mm bis 0,05 mm und beträgt vorteilhaft 0,035 mm.The thickness of the color-friendly material is preferably in the range of 0.1 mm to 0.5 mm, and more preferably 0.3 mm. Advantageously, the thickness of the ink repellent or water-friendly material is in the range of 0.01 mm to 0.10 mm, more preferably in the range of 0.02 mm to 0.05 mm and is advantageously 0.035 mm.

Die Breite einer umlaufenden Fläche oder eines Teilbereichs aus farbfreundlichem Material ist bevorzugt etwa die Breite eines Satzspiegels und liegt vorteilhaft im Bereich von 25 bis 35 cm. Bevorzugt ist die Breite des Teilbereichs aus wasserfreundlichem Material etwas größer als der Hub einer Reiberwalze und liegt vorteilhaft im Bereich von 18 bis 26 mm und beträgt vorteilhaft 22 mm.The width of a circumferential surface or a portion of color-friendly material is preferably about the width of a type area and is advantageously in the range of 25 to 35 cm. Preferably, the width of the portion of water-friendly material is slightly larger than the stroke of a distributor roller and is advantageously in the range of 18 to 26 mm and is advantageously 22 mm.

Gemäß einem weiteren Aspekt bezieht sich die Erfindung auf ein Farb- und/oder Feuchtwerk bevorzugt für Offset-Druckmaschinen mit mindestens einer wie oben beschriebenen Walze.According to another aspect, the invention relates to a color and / or dampening unit preferably for offset printing machines with at least one roller as described above.

Nach einem weiteren Aspekt bezieht sich die Erfindung auf ein Verfahren zur Herstellung einer wie oben beschriebenen Walze, wobei an einem Walzenrohkörper mindestens zwei etwa ringförmige oder teilringförmige Strukturen aus einem farbfreundlichen Material und dazwischen liegend mindestens eine ringförmige Struktur aus einem farbabstoβenden Material im Oberflächenbereich oder unmittelbar an der Oberfläche der Walze ausgebildet, also zum Beispiel freigelegt, angebracht oder darauf beschichtet werden.According to a further aspect, the invention relates to a method for producing a roller as described above, wherein at least two approximately annular or partially annular structures of a color-friendly material and intervening at least one annular structure of a Farbabstoβenden material in the surface region or directly to a Walzenrohkörper formed the surface of the roller, so for example exposed, attached or coated thereon.

Vorteilhaft wird die erfindungsgemäße Walze hergestellt, indem ein Walzenrohkörper oder Rohr durch Drehen vorbearbeitet wird, um eine Oberfläche mit einer gewünschten Beschaffenheit zu erhalten. In dem Walzenrohkörper können gemäß einer Ausführungsform schon ein oder mehrere Teilbereiche aus farbfreundlichem und farbabstoßendem bzw. farbabweisendes Material vorgesehen sein. Es ist auch möglich, dass ein farbfreundliches oder farbabstoßendes Material auf den Walzenrohkörper an den gewünschten Stellen aufgebracht wird. Das Aufbringen eines farbfreundlichen oder farbabstoßenden Materials kann zum Beispiel durch Verchromen, Aufschweißen oder durch ein Beschichtungsverfahren, wie zum Beispiel eine Plasmabeschichtung durchgeführt werden. Vorteilhaft kann ein Bereich am Übergang zwischen farbfreundlichen und farbabstoßenden oder -abweisenden Materialien oder ein Randbereich versiegelt werden, um zum Beispiel ein Eindringen von Feuchtigkeit in die Walze zu verhindern. Nach dem Aufbringen und/oder Freilegen und/oder Nachbearbeiten der Materialien aus farbfreundlichem und/oder farbabstoßendem Material kann eine Nachbearbeitung der so hergestellten Walze durch Drehen oder Überschleifen durchgeführt werden, um eine Walze zu erhalten, welche zum Beispiel in einem Farb- oder Feuchtwerk einer Druckmaschine eingesetzt werden kann.Advantageously, the roll according to the invention is produced by pre-processing a roll blank or pipe by turning to obtain a surface having a desired texture. In accordance with one embodiment, one or more subsections of color-friendly and ink-repellent or ink-repellent material can already be provided in the roll raw body. It is also possible that a color-friendly or ink-repellent material is applied to the Walzenrohkörper at the desired locations. The application of a color-friendly or ink-repellent material can be carried out, for example, by chromium plating, welding or by a coating method such as, for example, a plasma coating. Advantageously, an area at the transition between color-friendly and ink-repellent or repellent materials or a marginal area can be sealed in order to prevent, for example, moisture from entering the roller. After applying and / or exposing and / or reworking the materials of color-friendly and / or ink-repellent material, a post-processing of the roller thus produced by turning or grinding can be performed to obtain a roller, which, for example, in a paint or dampening of a Printing machine can be used.

Die Erfindung wird nachfolgend anhand bevorzugter Ausführungsbeispiele beschrieben werden:The invention will be described below with reference to preferred embodiments:

Es zeigen:

Figur 1
Eine schematische Schnittansicht eines Teilbereiches einer erfindungsgemäßen Walze;
Figur 2
Ein erstes Ausführungsbeispiel eines erfindungsgemäßen Verfahrens zum Herstellen einer Walze;
Figur 3
Ein zweites Ausführungsbeispiel eines erfindungsgemäßen Verfahrens zum Herstellen einer Walze; und
Figur 4
Ein Walzenschema zur Erläuterung des Einsatzes einer erfindungsgemäßen Walze.
Show it:
FIG. 1
A schematic sectional view of a portion of a roll according to the invention;
FIG. 2
A first embodiment of a method according to the invention for producing a roll;
FIG. 3
A second embodiment of a method according to the invention for producing a roll; and
FIG. 4
A roller diagram for explaining the use of a roller according to the invention.

Figur 1 zeigt in einer Schnittansicht einen Teilbereich einer erfindungsgemäßen Walze, wobei der Aufbau der Walze von der Mittelachse zur Oberfläche hin dargestellt ist. Die beispielhaft dargestellte Walze ist in vier Abschnitte der Breite Y, zugeordnet zu Zonen A bis D unterteilt, welche jeweils in etwa gleich breit sind und in etwa einem Satzspiegel entsprechen. In den Zonen A bis D ist an der Oberfläche ein farbfreundliches oder hydrophobes Material 25, 33, wie zum Beispiel Keramik, Kupfer, Polyamid oder Rilsan (R) mit einer Schichtdicke von ca. 0,3 mm angebracht. Zwischen dem farbfreundlichen Material ist an der Oberfläche farbabstoßendes oder wasserfreundliches Material 23, 34, im Ausführungsbeispiel Chrom, mit einer Schichtdicke von etwa 0,02 bis 0,05 mm und einer Breite von etwa 20 bis 24 mm angeordnet. Die Oberfläche der erfindungsgemäßen Walze ist demzufolge so ausgestaltet, dass über die eher einer Papierbreite B für den Druck entsprechende Oberfläche abwechselnd ein farbfreundliches Material, welches dem Satzspiegel zugeordnet ist und ein wasserfreundliches Material, welches zwischen zwei benachbarten farbfreundlichen Materialien liegt, angeordnet ist. FIG. 1 shows a sectional view of a portion of a roller according to the invention, wherein the structure of the roller is shown from the central axis to the surface. The roller shown by way of example is subdivided into four sections of width Y, assigned to zones A to D, which each have approximately the same width and correspond approximately to a type area mirror. In the zones A to D, a color-friendly or hydrophobic material 25, 33, such as ceramic, copper, polyamide or Rilsan (R) with a layer thickness of about 0.3 mm is attached to the surface. Between the color-friendly material is on the surface of ink repellent or water-friendly material 23, 34, arranged in the embodiment of chromium, with a layer thickness of about 0.02 to 0.05 mm and a width of about 20 to 24 mm. Accordingly, the surface of the roller according to the invention is designed such that a color-friendly material which is assigned to the type area and a water-friendly material which lies between two adjacent color-friendly materials is arranged alternately over the surface corresponding more to a paper width B for the printing.

Eine mit einer solchen Oberfläche versehene Feuchtreiberwalze, welche im Druckeinsatz mit einem Hub von beispielsweise 20 mm in axialer Richtung hin- und herbewegt wird, stellt einerseits sicher, dass durch das dem Satzspiegel zugeordnete farbfreundliche Material das Übertragen einer Farbe möglich ist und verhindert andererseits durch das zwischen den Bereichen aus farbfreundlichem Material liegende farbabstoßende oder wasserfreundliche Material, dass sich Farben, welche in benachbarten Zonen nebeneinander laufen, vermischen können. Der Oberflächenbereich aus wasserfreundlichem Material stellt im Betrieb eine ausreichende Zu- und Abfuhr von Wasser sicher und kann somit eine über den Rand einer Zone bzw. eines Satzspiegels hinausfließende Farbe abtransportieren und kann somit verhindern, dass diese Farbe in eine benachbarte Zone oder einen benachbarten Satzspiegel läuft.On the one hand, a dampening drive roller provided with such a surface, which is moved back and forth in the axial direction in the printing insert with a stroke of, for example, 20 mm, ensures that the color-friendly material assigned to the type area mirror the transfer of a color is possible and on the other hand prevented by lying between the areas of color-friendly material ink-repellent or water-friendly material that colors that run in adjacent zones next to each other, can mix. The surface area of water-friendly material ensures a sufficient supply and discharge of water during operation and can thus carry away beyond the edge of a zone or a sentence mirror outgoing color and thus can prevent this color runs in an adjacent zone or an adjacent type area ,

Figur 2 zeigt eine erste Ausführungsform eines erfindungsgemäßen Verfahrens zur Herstellung einer erfindungsgemäßen Walze. In dem mit 1 bezeichneten Ausgangszustand liegt ein Walzenrohkörper oder Rohr 20 vor, welches durch Drehen so vorbearbeitet wird, dass vier umlaufende Vertiefungen 21 erzeugt werden. Zwischen jeweils zwei Vertiefungen 21 befindet sich jeweils ein umlaufender Vorsprung 22. FIG. 2 shows a first embodiment of a method according to the invention for producing a roll according to the invention. In the initial state designated 1, there is a roll raw body or tube 20, which is pre-machined by turning so that four circumferential recesses 21 are produced. Between each two recesses 21 is in each case a circumferential projection 22nd

In Schritt 2 wird jeder umlaufende Vorsprung 22 verchromt und so eine Lage Chrom 23 aufgebracht.In step 2, each circumferential projection 22 is chrome plated and so a layer of chromium 23 applied.

Als nächstes wird an den mit 24 gekennzeichneten Übergängen zwischen dem aufgebrachten Chrom 23 und dem Walzenrohkörper 20 eine Schweißnaht 24 angebracht, um eine wasserdichte Versiegelung am Rand der Chromschicht 23 herzustellen. Bevorzugt kann die Schweißnaht 24 aufgeraut werden, um ein besseres Anhaften der im Schritt 4 aufzubringenden farbfreundlichen oder hydrophoben Beschichtung 25 zu gewährleisten.Next, at the transitions marked 24, between the deposited chromium 23 and the cylindrical tube 20, a weld 24 is applied to produce a watertight seal at the edge of the chrome layer 23. Preferably, the weld 24 can be roughened to ensure better adhesion of the applied in step 4 color-friendly or hydrophobic coating 25.

Beispielsweise kann ein Polyamid als farbfreundliche Schicht 25 aufgebracht werden. Es ist möglich eine Plasmabeschichtung durchzuführen, um die farbfreundliche Schicht 25 zu erzeugen. Ebenso kann eine Hartverchromung durchgeführt werden. Vorteilhaft wird Rilsan als farbfreundliches Material 25 auf die Walze 20 aufgebracht. Die farbfreundliche Schicht kann entweder als einzelne Lage oder in mehreren Lagen - im Ausführungsbeispiel drei Lagen - auf die Walze 20 aufgebracht werden.For example, a polyamide can be applied as a color-friendly layer 25. It is possible to perform a plasma coating to produce the color-friendly layer 25. Likewise, a hard chrome plating can be performed. Rilsan is advantageously applied as a color-friendly material 25 on the roller 20. The color-friendly layer can be applied to the roller 20 either as a single layer or in multiple layers-in the exemplary embodiment, three layers.

Abschließend kann, wie in Schritt 5 gezeigt, die durch die Bearbeitungsschritte 1 bis 4 hergestellte Walze 20 überschliffen oder gedreht werden, um eine im Wesentlichen planare Oberfläche mit umlaufenden farbfreundlichen Teilbereichen 25 zu erhalten, welche durch umlaufende farbabweisende oder wasserfreundliche Teilbereich 23 unterbrochen bzw. voneinander getrennt werden.Finally, as shown in step 5, the roller 20 produced by the processing steps 1 to 4 can be ground or turned to obtain a substantially planar surface with circumferential color-friendly portions 25 which are interrupted by circumferential ink-repellent or water-friendly portions 23 be separated.

Figur 3 zeigt Verfahrensschritte zur Durchführung eines zweiten erfindungsgemäßen Verfahrens zur Herstellung der erfindungsgemäßen Walze. FIG. 3 shows process steps for carrying out a second process according to the invention for producing the roll according to the invention.

Bei Schritt 1 wird ein Walzenrohkörper 30 bei der durch den Pfeil gekennzeichneten Fläche durch Überdrehen bearbeitet, um die Oberfläche des Walzenrohkörpers 30 für das nachfolgende Herstellungsverfahren planar zu machen. Anschließend wird in Schritt 2 eine um die Mittelachse des Walzenrohkörpers 30 umlaufende Vertiefung 31 durch Einstechen oder ein anderes materialabhebendes Verfahren erzeugt. Anschließend wird, wie in Schritt 3 gezeigt, in die in Schritt 2 ausgebildete Vertiefung 31 durch rostfreies Aufschweißen ein Material 32 aufgebracht. Nachfolgend wird, wie in Schritt 4 gezeigt, durch Vordrehen die Oberfläche des durch die Schritte 1 bis 3 vorbearbeiteten Walzenrohkörpers 30 in eine gewünschte Form gebracht, wobei die außenliegende Oberfläche des in Schritt 3 aufgebrachten Materials 32 planar gemacht und die Breite dieses Materials 32 auf die gewünschte Breite verkleinert wird.In step 1, a roll raw body 30 is processed by over-turning in the area indicated by the arrow to make the surface of the Walzenrohkörpers 30 planar for the subsequent manufacturing process. Subsequently, in step 2, a recess 31 running around the central axis of the rolling raw body 30 is produced by piercing or another material-removing method. Subsequently, as shown in step 3, a material 32 is applied to the recess 31 formed in step 2 by stainless welding. Subsequently, as shown in step 4, the surface of the raw cylindrical body 30 pre-machined by steps 1 to 3 is made into a desired shape by pre-turning, the outer surface of the material 32 applied in step 3 being made planar and the width of this material 32 being planarized desired width is reduced.

Im nachfolgenden Schritt 5 wird ein farbfreundliches Material 33, wie zum Beispiel Rilsan (R) auf die Oberflächenbereiche des Walzenrohkörpers 30 aufgebracht, welche an den vorstehenden Bereich des Materials 32 angrenzen. Wie oben bei Figur 2 beschrieben, können eine oder mehrere Schichten des farbfreundlichen Materials 33 aufgebracht werden. Die außenliegende Oberfläche des zwischen dem farbfreundlichen Material 33 eingebetteten Materials 32 wird in Schritt 6 hartverchromt, um eine farbabweisende Chromschicht 34 aufzubringen und nachfolgend wird der durch die Schritte 1 bis 6 bearbeitete Walzenrohkörper 30 in Schritt 7 überschliffen, um eine im Wesentlichen planare Außenoberfläche zu erhalten.In the subsequent step 5, a color-friendly material 33, such as Rilsan (R) is applied to the surface regions of the Walzenrohkörpers 30, which adjoin the projecting portion of the material 32. As above FIG. 2 described, one or more layers of the color-friendly material 33 may be applied. The outermost surface of the material 32 embedded between the color-friendly material 33 is hard-chrome plated in step 6 to apply a chromium color-repellent layer 34, and subsequently the green-body 30 processed by steps 1-6 is ground in step 7 to obtain a substantially planar outer surface ,

Obwohl in den Figuren 2 und 3 Ausführungsbeispiele zur Herstellung von Walzen bzw. Walzenoberflächen mit vier bzw. zwei Teilbereichen aus farbfreundlichem Material gezeigt sind, können diese Verfahren zur Herstellung einer beliebigen Anzahl von Beschichtungen von Walzen mit farbfreundlichen und farbabweisenden Oberflächen verwendet werden.Although in the Figures 2 and 3 Embodiments for producing roll surfaces having four or two portions of color-friendly material are shown, these methods can be used to produce any number of coatings of rolls with color-friendly and ink-repellent surfaces.

Claims (10)

  1. A roller for a printing machine, comprising: at least two partial regions (25, 33) which encircle the central axis of the roller and are made of ink-attracting material; and at least one annular encircling partial region (23, 34) which is made of ink-repellent material and is arranged between the at least two encircling partial regions (25, 33) made of ink-attracting material, wherein the partial regions (25, 33) which encircle the central axis of the roller and are made of ink-attracting material and the at least one annular partial region (23, 34) made of ink-repellent material exhibit the same diameter.
  2. The roller according to claim 1, wherein the at least two ink-attracting partial regions (25, 33) are made of a ceramic, copper, polyamide or Rilsan.
  3. The roller according to any one of the preceding claims, wherein the at least one encircling ink-repellent partial region (23, 34) is made of chromium.
  4. The roller according to any one of the preceding claims, comprising: a plurality of encircling partial regions made of ink-attracting material; and a plurality of encircling partial regions made of ink-repellent material which lie between the partial regions made of ink-attracting material.
  5. The roller according to any one of the preceding claims, wherein an encircling partial region made of ink-attracting material is 0.1 to 0.5 mm thick and/or 25 to 35 cm wide.
  6. The roller according to any one of the preceding claims, wherein an encircling partial region made of ink-repellent material is 0.01 to 0.10 mm thick and 18 to 26 mm wide.
  7. A dampening unit comprising at least one roller according to any one of the preceding claims.
  8. A method for manufacturing a roller according to any one of claims 1 to 6, wherein: at least two annular structures (25, 33) made of ink-attracting material and at least one annular structure (23, 34) which is made of ink-repellent material and lies between said annular structures (25, 33) are formed on a semi-finished roller body (20, 30); and the entire semi-finished roller body (20, 30) is then finished by grinding or turned on a lathe.
  9. The method according to the preceding claim, wherein the annular structures (23, 25, 33, 34) are applied by being welded on, chrome-plated or by plasma-coating.
  10. The method according to any one of the preceding two claims, wherein at least one peripheral region of an annular structure (23, 25, 33, 34) is welded in order to seal it.
EP04405171A 2003-04-09 2004-03-22 Cylinder for a printing machine and process for producing of cylinder Expired - Lifetime EP1466729B1 (en)

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DE10316240 2003-04-09
DE10316240A DE10316240A1 (en) 2003-04-09 2003-04-09 Roller for a printing machine and method for producing a roller

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CN101195298B (en) * 2006-12-07 2011-03-16 海德堡印刷机械股份公司 Printing press with a washing device for an inking unit and method for removing ink
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DE102015015377A1 (en) * 2015-11-27 2017-06-01 Giesecke & Devrient Gmbh Anilox roller for a flexographic printing machine

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ATE476295T1 (en) 2010-08-15
US20040226461A1 (en) 2004-11-18
DE10316240A1 (en) 2004-11-04
DE502004011465D1 (en) 2010-09-16
EP1466729A2 (en) 2004-10-13
US7127990B2 (en) 2006-10-31

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