EP0183984A2 - Printing unit for a rotary offset-printing press - Google Patents

Printing unit for a rotary offset-printing press Download PDF

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Publication number
EP0183984A2
EP0183984A2 EP85113767A EP85113767A EP0183984A2 EP 0183984 A2 EP0183984 A2 EP 0183984A2 EP 85113767 A EP85113767 A EP 85113767A EP 85113767 A EP85113767 A EP 85113767A EP 0183984 A2 EP0183984 A2 EP 0183984A2
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EP
European Patent Office
Prior art keywords
cylinder
printing unit
printing
channel
transitions
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
EP85113767A
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German (de)
French (fr)
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EP0183984A3 (en
EP0183984B1 (en
Inventor
Wolfgang Pfizenmaier
Hans-Jürgen Beck
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.)
Heidelberger Druckmaschinen AG
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Heidelberger Druckmaschinen AG
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Publication date
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Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0183984A2 publication Critical patent/EP0183984A2/en
Publication of EP0183984A3 publication Critical patent/EP0183984A3/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders

Definitions

  • the innovation relates to printing unit cylinders for offset rotary printing presses according to the preamble of claim 1.
  • Such coatings of the printing couple cylinders by a galvanic process are known per se and essentially serve to protect the surface of the cylinder from corrosion.
  • a chrome layer is normally used for this, which must then be ground to exact dimensional and shape accuracy.
  • the disadvantage of the known design can be seen in a high manufacturing effort and thus in high costs, without e.g. a desired surface structure of the chrome layer can be achieved.
  • the object of the invention is to create a cylinder surface that does not require any mechanical reworking after coating, has a high corrosion resistance, and reduces the channel joint by a smooth transition.
  • the object is achieved according to the characterizing features of claim 1.
  • reworking of the cylinder is avoided and a high corrosion resistance is achieved through a layer that is insensitive to impact and shock.
  • a smooth transition is ensured during the passage of the channel and the structure of the surface of the cylinder jacket prevents the plate support from slipping without impairing the good cleaning ability of the cylinder jacket surface.
  • the printing couple cylinder 1 with its transitions 2 on the cylinder channel 3 has a coating 4 on its outer surface 5, which consists of a nickel layer 6 as a base layer and a chrome layer 7 as a cover layer.
  • both layers are applied galvanically, whereby the cylinder diameter and the transitions 2 on the cylinder channel 3 are designed such that after application of the two layers, the cylinder body has the finished size, without the need for reworking.
  • the transition 2 on the cylinder channel 3 into the outer surface of the printing unit cylinder 1 is made without a visible edge.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Electroplating Methods And Accessories (AREA)

Abstract

Die Erfindung bezieht sich auf einen Druckwerkszylinder für Offset-Rotationsdruckmaschinen mit einer verschleiß-und korrosionsbeständigen Mantelfläche, die galvanisch aufgebracht wird, derart, daß nach der Beschichtung keine mechanische Nacharbeit erforderlich ist und eine hohe Korrosionsbeständigkeit erreicht wird, wobei im Bereich des Zylinderkanals ein weicher Übergang den Kanalstoß reduziert.

Figure imgaf001
The invention relates to a printing unit cylinder for offset rotary printing presses with a wear and corrosion-resistant outer surface which is applied galvanically in such a way that no mechanical rework is required after coating and a high level of corrosion resistance is achieved, with a soft transition in the area of the cylinder channel reduced the channel impact.
Figure imgaf001

Description

Die Neuerung bezieht sich auf Druckwerkszylinder für Offset-Rotationsdruckmaschinen gemäß dem Oberbegriff des Anspruchs l.The innovation relates to printing unit cylinders for offset rotary printing presses according to the preamble of claim 1.

Derartige Beschichtungen der Druckwerkszylinder nach einem galvanischen Verfahren sind an sich bekannt und dienen im Wesentlichen dazu, die Oberfläche des Zylinders vor Korrosion zu schützen. Hierzu dient normalerweise eine Chromschicht, die sodann auf genaue Maß- und Formgenauigkeit geschliffen werden muß. Der Nachteil der bekannten Ausführung ist in einem hohen Fertigungsaufwand und damit in hohen Kosten zu sehen, ohne daß z.B. eine gewünschte Oberflächenstruktur der Chromschicht erreicht werden kann. Auch entsteht beim Schleifen an den Übergängen am Zylinderkanal eine sichtbare Kante, die zu Störungen in der Abwicklung der einzelnen Zylinder gegeneinander führen kann.Such coatings of the printing couple cylinders by a galvanic process are known per se and essentially serve to protect the surface of the cylinder from corrosion. A chrome layer is normally used for this, which must then be ground to exact dimensional and shape accuracy. The disadvantage of the known design can be seen in a high manufacturing effort and thus in high costs, without e.g. a desired surface structure of the chrome layer can be achieved. When grinding at the transitions on the cylinder channel, there is also a visible edge that can lead to disruptions in the processing of the individual cylinders against each other.

Die Aufgabe der Erfindung ist es eine Zylinderoberfläche zu schaffen, die nach der Beschichtung keine mechanische Nacharbeit erfordert, eine hohe Korrosionsbeständigkeit besitzt, und den Kanalstoß durch einen weichen Übergang reduziert.The object of the invention is to create a cylinder surface that does not require any mechanical reworking after coating, has a high corrosion resistance, and reduces the channel joint by a smooth transition.

Die Aufgabe wird gemäß den kennzeichnenden Merkmalen des Anspruchs 1 gelöst. Mit dieser Lösung wird ein Nacharbeiten des Zylinders vermieden und eine hohe Korrosionsbeständigkeit durch eine schlag- und stoßunempfindliche Schicht erreicht. Beim Abwickeln der Zylinder gegeneinander wird ein weicher Übergang beim Durchgang des Kanals gewährleistet und durch die Struktur der Oberfläche des Zylindermantels wird ein Verrutschen der Plattenunterlage verhindert, ohne daß die gute Reinigungsmöglichkeit der Zylindermantelfläche beeinträchtigt ist.The object is achieved according to the characterizing features of claim 1. With this solution, reworking of the cylinder is avoided and a high corrosion resistance is achieved through a layer that is insensitive to impact and shock. When unrolling the cylinders against each other, a smooth transition is ensured during the passage of the channel and the structure of the surface of the cylinder jacket prevents the plate support from slipping without impairing the good cleaning ability of the cylinder jacket surface.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung schematisch dargestellt.An embodiment of the invention is shown schematically in the drawing.

Der Druckwerkszylinder 1 mit seinen Übergängen 2 am Zylinderkanal 3 weist eine Beschichtung 4 an seiner Mantelfläche 5 auf, die als Grundschicht aus einer Nickelschicht 6 besteht und als Deckschicht aus einer Chromschicht 7. Nach dem Sandstrahlen der Zylindermantelfläche werden beide Schichten auf galvanischem Wege aufgebracht, wobei der Zylinderdurchmesser und die Übergänge 2 am Zylinderkanal 3 so ausgeführt sind, daß nach Aufbringen der beiden Schichten der Zylinderkörper das Fertigmaß aufweist,ohne daß eine Nachbearbeitung erforderlich ist. Hierbei ist der Übergang 2 am Zylinderkanal 3 in die Mantelfläche des Druckwerkszylinders 1 ohne sichtbare Kante ausgeführt.The printing couple cylinder 1 with its transitions 2 on the cylinder channel 3 has a coating 4 on its outer surface 5, which consists of a nickel layer 6 as a base layer and a chrome layer 7 as a cover layer. After the cylinder surface has been sandblasted, both layers are applied galvanically, whereby the cylinder diameter and the transitions 2 on the cylinder channel 3 are designed such that after application of the two layers, the cylinder body has the finished size, without the need for reworking. Here, the transition 2 on the cylinder channel 3 into the outer surface of the printing unit cylinder 1 is made without a visible edge.

Claims (1)

1. Druckwerkszylinder für Offset-Rotationsdruckmaschinen mit einer verschleiß- und korrosionsbeständigen Mantelfläche, die galvanisch aufgebracht ist,
dadurch gekennzeichnet, daß der Durchmesser des Druckwerkszylinders (1) und die Übergänge (2) am Zylinderkanal (3) entsprechend der aufzubringenden Beschichtung (4) kleiner ausgebildet sind, daß die.Mantelfläche (5) und die Übergänge (2) vor dem Beschichten sandgestrahlt sind mit einer Oberflächenrauhigkeit von 10 - 20 µm, daß eine Grundschicht aus Nickel (6) mit einer Härte von 180 - 220 HV aufgebracht wird und daß eine Chromschicht (7) auf die Nickelschicht (6) mit einer Härte von > 900 HV und einer mikrorissigen Oberfläche von > 400 Risse/cm aufgebracht wird, so daß ohne Nachbearbeitung der Zylinderdurchmesser das Fertigmaß aufweist. 1. printing unit cylinder for offset rotary printing presses with a wear and corrosion-resistant outer surface which is applied galvanically,
characterized, that the diameter of the printing unit cylinder (1) and the transitions (2) on the cylinder channel (3) are made smaller in accordance with the coating (4) to be applied, that the surface area (5) and the transitions (2) are sandblasted before coating with a surface roughness of 10-20 µm, that a base layer of nickel (6) with a hardness of 180-220 HV is applied and that a chromium layer (7) is applied to the nickel layer (6) with a hardness of> 900 HV and a micro-cracked surface of> 400 cracks / cm, so that the cylinder size has the finished size without reworking.
EP85113767A 1984-11-23 1985-10-29 Printing unit for a rotary offset-printing press Expired EP0183984B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19848434353U DE8434353U1 (en) 1984-11-23 1984-11-23 PRINTING CYLINDER FOR OFFSET ROTARY PRINTING MACHINES
DE8434353U 1984-11-23

Publications (3)

Publication Number Publication Date
EP0183984A2 true EP0183984A2 (en) 1986-06-11
EP0183984A3 EP0183984A3 (en) 1987-10-21
EP0183984B1 EP0183984B1 (en) 1989-04-05

Family

ID=6773009

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85113767A Expired EP0183984B1 (en) 1984-11-23 1985-10-29 Printing unit for a rotary offset-printing press

Country Status (4)

Country Link
US (1) US4643095A (en)
EP (1) EP0183984B1 (en)
JP (1) JP2545646Y2 (en)
DE (1) DE8434353U1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0373481A3 (en) * 1988-12-12 1990-12-05 Eastman Kodak Company Web conveying roller, and a process for manufacturing such a roller

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4212582A1 (en) * 1992-04-15 1993-10-21 Hell Ag Linotype Prodn. of gravure printing cylinders - comprises providing a metal (alloy) protective layer on the cylinder surface before the gravure process
DE4323750C2 (en) * 1993-07-15 1997-03-27 Roland Man Druckmasch Offset printing form and method for producing such an offset printing form
US5511476A (en) * 1993-10-26 1996-04-30 R. R. Donnelley & Sons Co. Magnetic cylinder with surface gripping
DE19705671A1 (en) * 1997-02-14 1998-08-20 Heidelberger Druckmasch Ag Printing machine with a corrosion-protected printing unit cylinder
US5924967A (en) * 1997-07-28 1999-07-20 Eastman Kodak Company Wear resistant transport roller
US6176182B1 (en) * 1997-08-12 2001-01-23 Fuji Photo Film Co., Ltd. Block copy material for lithographic printing plate material, lithographic press and lithographic printing method
US6397746B1 (en) * 1999-08-09 2002-06-04 Fuji Photo Film Co., Ltd. Camera-ready copy sheet for lithographic printing plates
DE10355005B4 (en) * 2002-11-29 2005-12-01 Koenig & Bauer Ag Cylinder of a printing machine with at least one channel arranged in its bale and method for its production
DE10349446B4 (en) * 2003-10-23 2005-09-29 Koenig & Bauer Ag Method for coating a surface of a cylinder and cylinder with this coating
DE10349447B4 (en) * 2003-10-23 2005-10-06 Koenig & Bauer Ag Method for producing a cylinder and cylinder
DE102007006705A1 (en) * 2007-02-10 2008-08-14 Man Roland Druckmaschinen Ag Process for coating a printing press cylinder

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2114072A (en) * 1935-05-07 1938-04-12 Ralph E Cleveland Press roll for paper making machines and the method of making same
CA1009507A (en) * 1972-07-14 1977-05-03 Edmund Hayes (Jr.) Ceramic inking roll
DE2602277A1 (en) * 1975-01-27 1976-07-29 Adamovske Strojirny Np PRINTING MACHINE CYLINDERS
CH619646A5 (en) * 1977-05-09 1980-10-15 De La Rue Giori Sa
DE2916505A1 (en) * 1979-04-24 1980-10-30 Heidelberger Druckmasch Ag ARCHING FILM AS A LIFT FOR COUNTERPRESSURE CYLINDERS
DE3023246A1 (en) * 1979-07-02 1981-01-08 Polygraph Leipzig Printing press guide cylinder sleeve - has homogeneous layers of different materials bonded together to form outer layer
JPS568264A (en) * 1979-07-03 1981-01-28 Dainippon Printing Co Ltd Preparation of cylinder for photogravure printing
JPS5825592A (en) * 1981-08-06 1983-02-15 Masao Umehara Device for taking out dropping impact by gravity
JPS58134749A (en) * 1982-02-05 1983-08-11 Toshiba Mach Co Ltd Printing cylinder of offset rotary press

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0373481A3 (en) * 1988-12-12 1990-12-05 Eastman Kodak Company Web conveying roller, and a process for manufacturing such a roller

Also Published As

Publication number Publication date
JP2545646Y2 (en) 1997-08-25
US4643095A (en) 1987-02-17
EP0183984A3 (en) 1987-10-21
DE8434353U1 (en) 1985-02-21
JPS6193235U (en) 1986-06-16
EP0183984B1 (en) 1989-04-05

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