EP1428658B2 - Cylindre porte-plaque pour une machine d'impression offset en particulier une machine rotative - Google Patents

Cylindre porte-plaque pour une machine d'impression offset en particulier une machine rotative Download PDF

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Publication number
EP1428658B2
EP1428658B2 EP03027960A EP03027960A EP1428658B2 EP 1428658 B2 EP1428658 B2 EP 1428658B2 EP 03027960 A EP03027960 A EP 03027960A EP 03027960 A EP03027960 A EP 03027960A EP 1428658 B2 EP1428658 B2 EP 1428658B2
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EP
European Patent Office
Prior art keywords
plate
printing
cylinder
forme
cylinders
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 - Fee Related
Application number
EP03027960A
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German (de)
English (en)
Other versions
EP1428658A1 (fr
EP1428658B1 (fr
Inventor
Peter Knauer
Josef Singler
Klaus T. Reichel
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.)
Manroland AG
Original Assignee
Manroland AG
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Publication date
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Publication of EP1428658A1 publication Critical patent/EP1428658A1/fr
Application granted granted Critical
Publication of EP1428658B1 publication Critical patent/EP1428658B1/fr
Publication of EP1428658B2 publication Critical patent/EP1428658B2/fr
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Classifications

    • 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
    • B41F13/10—Forme cylinders

Definitions

  • the invention relates to a plate or forme cylinder of a rotary offset printing machine according to claim 1.
  • the plate or form cylinder can be used as a support or receiving element of a plate-shaped, in a rounded form in axially extending clamping channels fixed, or a sleeve-shaped and can be pushed in this form printing form especially in offset printing, but is not limited thereto.
  • the printing unit can look like a classic offset printing unit with plate or form cylinder, i. Printing form, blanket and impression cylinder.
  • the printed image is known to be transferred from the plate cylinder to the blanket cylinder and from there to the paper passing over the printing cylinder.
  • the transfer of color, both from the plate to the blanket, as well as the blanket on the paper is only possible if a certain minimum pressure, the so-called line pressure between blanket and plate, or forme cylinder, is present.
  • the printing form cylinder (i.e., the printing plate) thus provides permanently the desired function only when correctly set (provided), i. a constant print quality. Too little employment leads due to the tolerances of concentricity and cylindricity to a non-uniform ink or dampening agent transport. Too high employment adversely affects the life of the cylinder surface due to the internal friction and pressure overload.
  • the so-called channelless pressure in particular the sleeve technique, which is characterized by a printing plate applied seamlessly to a sleeve or a printing plate which is laser-welded to form a round shape, allows a reduced rigidity because of the reduced vibration excitation due to the missing cylinder channels.
  • the length / thickness ratio of the printing cylinder, or their relative stiffness with respect to a deflection becomes increasingly unfavorable.
  • the shape and position of the impression cylinders undesirably change from one another, i. that the impression cylinders bend.
  • the change in position due to deflection changes the pressure provision, i. the contact pressure between the pressure cylinders cooperating in the printing unit, which is seen over the cylinder width uneven. Determined in value numbers, this pressure provision is generally achieved by measuring the so-called impression width, i. the width of the zone that is set at each other, i. Pressed on cylinders defined the contact area of the cylinder. This measurement is particularly easy in offset printing, since always one cylinder of a pair of cylinders has a compressible (soft) surface.
  • the Patent DE 21 51 650 C3 relates to a cylinder of an offset rotary printing unit with a plate cylinder, a blanket cylinder and a pressure cylinder, wherein to reduce Passerdifferenzen tangential forces are to be reduced by the radial distance of the lateral surface of at least one cylinder gradually decreases from its axis of rotation in the direction of rotation from the print start to the end of printing.
  • at least one of the cylinders may be concave or convex in longitudinal section.
  • JP 080 25 606 A refers to photo-engraving and discloses a narrow role with spherical contour, which is employed on a counter-pressure cylinder, and it should rest only in the region of its largest diameter on the substrate (sheet).
  • Patent US 4,934,266 refers to a tensioning mechanism for a gravure printing plate on a printing cylinder, wherein the outer diameter of a tubular, elastic, thin shell of the cylinder is increased by filling peripheral chambers with a non-compressible liquid.
  • Patent US 2,206,186 discloses two pairs of cylinders between which a web is performed and successively printed front and back in direct printing.
  • Four individual printing plates are arranged across the width of the forme cylinder, the middle two printing plates being made thicker than the outer ones, whereby the printing cylinder has a larger diameter in the middle.
  • the Laid-open publication DE 23 57 538 A1 relates to a printing cylinder for rotary printing machines, in particular gravure printing machines, whose elastic deformability at the ends is greater than in the central region.
  • Fig. 4b shows the undesirable changes in position (deflection) of the two plate, or forme cylinder 1 of an offset printing unit for perfecting the Fig. 4a to each other during the printing operation.
  • the contact pressure is uneven across the cylinder width, ie, a line pressure is generated which becomes irregular over the cylinder width.
  • the plate, or forme cylinder of a rotary particular offset printing machine bend by the reaction forces of the blankets or rubber sleeves 10 in the center of pressure.
  • the blanket cylinder 11 bend slightly less than the plate or forme cylinder 1, since they are supported by the plate, or forme cylinder 1.
  • the pressure cylinder contour is pressed into the blanket, the surface load associated therewith causes a bending of the cylinder, resulting in a higher edge load and a much lower load in the middle of the cylinder.
  • the deflection of the printing form carrier can be determined based on theoretical calculations with known material parameters and area and line forces, for example by finite element calculation.
  • Fig.1 is the surface 2 of the lateral surface of the plate or forme cylinder 1 rubdum in the axial direction in the circumferential direction with a convex profile, which was empirically or as previously indicated mathematically determined, made, ie designed spherical.
  • the shape curve 2 of the crown of the cylinder surface may be a circular arc or a parabola of at least second order. That is, the convex profile of the lateral surface 2 varies in the axial direction so that the diameter of the plate, or forme cylinder 1 in the center of the axle is the largest and smallest at the lateral edges.
  • the printing plate used is a printing plate which has to be fixed in a cylinder pit 5 of a plate cylinder 1, then it shows Fig. 2 in that the transitions 3, 4 (radii) of the cylinder pit 5 along the crowned cylinder surface 2 are designed accordingly, such that the pit width "s" remains constant over the axial length of the cylinder pit 5.
  • Fig. 3a is one in a plate cylinder according to the Fig. 2 to be used printing plate 6 designed such; that the bending length of the leading pressure plate radius 7 and trailing pressure plate radius 8 in the center of pressure I center , as in Fig. 3b is shown bent longer than at the printing margins, so that the length at the printing margins I edge is shorter than the length in the middle I center .
  • the trailing pressure plate radius 8 describes a shape curve 9, which must harmonize with the shape curve 2 of the surface of the plate cylinder 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Printing Plates And Materials Therefor (AREA)

Claims (5)

  1. Cylindre porte-plaques ou de forme d'impression d'une machine d'impression rotative, en particulier d'une machine offset, comportant une surface enveloppe de section circulaire recevant une forme d'impression et la surface du cylindre porte-plaques ou de forme d'impression (1) a une surface enveloppe (2) à courbure convexe dans la direction axiale,
    les cylindres porte-plaques ou de forme d'impression étant installés dans un groupe d'impression à deux cylindre porte-blanchet, appliqués l'un contre l'autre pour l'impression recto-verso et le profil convexe déterminé par calcul des surfaces enveloppes (2) varie de façon que le diamètre des cylindres porte-plaques ou de forme d'impression soit le plus grand au milieu de l'axe et le plus petit au niveau des bords latéraux de façon que les différences des forces linéaires entre le bord d'impression et le milieu d'impression soit réduit considérablement au contact entre le cylindre porte-plaques et le blanchet.
  2. Cylindre porte-plaques ou de forme d'impression selon la revendication 1,
    caractérisé en ce que
    le profil convexe de la chemise (2) décrit un arc de cercle.
  3. Cylindre porte-plaques ou de forme d'impression selon la revendication 1,
    caractérisé en ce que
    le profil convexe de la chemise (2) décrit une parabole au moins de deuxième ordre.
  4. Cylindre porte-plaques ou de forme d'impression selon les revendications 1 à 3,
    caractérisé en ce que
    lorsqu'on l'utilise pour recevoir une forme d'impression (6) en forme de plaque dans le cylindre porte-plaque (1), on prévoit, à travers la chemise (2), une cavité (5) dont les passages (3, 4) sont réalisés en conséquence le long de la chemise convexe (2) de manière à ce que la largeur (s) de la cavité soit constante sur la longueur axiale de la cavité (5).
  5. Cylindre porte-plaques ou de forme d'impression selon la revendication 4,
    caractérisé par
    son utilisation avec une plaque d'impression (6) configurée de manière que la longueur de flexion depuis le rayon d'entrée (7) de la plaque d'impression et le rayon de sortie (8) de la plaque d'impression a une courbure, au centre d'impression IMitte plus longue que sur les bords d'impression, de sorte que la longueur sur les bords d'impression IRand est plus courte que la longueur au centre IMitte.
EP03027960A 2002-12-10 2003-12-05 Cylindre porte-plaque pour une machine d'impression offset en particulier une machine rotative Expired - Fee Related EP1428658B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10257746 2002-12-10
DE10257746A DE10257746B3 (de) 2002-12-10 2002-12-10 Formzylinder einer Rotationsdruckmaschine, insbesondere einer Offsetdruckmaschine

Publications (3)

Publication Number Publication Date
EP1428658A1 EP1428658A1 (fr) 2004-06-16
EP1428658B1 EP1428658B1 (fr) 2007-09-05
EP1428658B2 true EP1428658B2 (fr) 2011-03-09

Family

ID=32319031

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03027960A Expired - Fee Related EP1428658B2 (fr) 2002-12-10 2003-12-05 Cylindre porte-plaque pour une machine d'impression offset en particulier une machine rotative

Country Status (4)

Country Link
US (1) US6860200B2 (fr)
EP (1) EP1428658B2 (fr)
JP (1) JP2004188967A (fr)
DE (3) DE10257746B3 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10258048A1 (de) * 2002-12-11 2004-06-24 Man Roland Druckmaschinen Ag Gummituchzylinder für Offset-Druckmaschinen
DE10335758C5 (de) * 2003-08-05 2015-12-03 Manroland Web Systems Gmbh Verfahren und Druckwerk zur Beeinflussung der lateralen Bahnspreizung insbesondere an Rotationsdruckmaschinen
US7096789B2 (en) * 2004-05-04 2006-08-29 Goss International Americas, Inc. Web printing press and method for controlling print-to-cut and/or circumferential register
US7104198B2 (en) * 2004-03-08 2006-09-12 Goss International Americas, Inc. Printing blanket with convex outer print surface
US20050229800A1 (en) * 2004-04-20 2005-10-20 Heidelberger Druckmaschinen Ag Plate cylinder with larger diameter central image area
DE102004056389B4 (de) * 2004-09-16 2008-05-21 Koenig & Bauer Aktiengesellschaft Druckwerk einer Offsetdruckmaschine mit mindestens einem Formzylinder und einem Übertragungszylinder
JP5148061B2 (ja) * 2005-08-24 2013-02-20 出光興産株式会社 照明装置用ハウジング構造体、およびその製造方法、該構造体を用いたバックライト装置
DE102006011477B4 (de) * 2006-03-13 2007-12-27 Koenig & Bauer Aktiengesellschaft Druckwerk mit einem geteilten Formzylinder
CN101045367A (zh) * 2006-03-28 2007-10-03 海德堡印刷机械股份公司 网纹辊印刷装置
DE102006046521A1 (de) * 2006-09-29 2008-04-03 Man Roland Druckmaschinen Ag Druckwerk einer Druckmaschine
US20090297715A1 (en) * 2008-05-27 2009-12-03 E.I. Du Pont De Nemours And Company Apparatus and method for treating a cylindrically-shaped element having a clamp assembly
CN109484008A (zh) * 2018-10-18 2019-03-19 南宁七彩虹印刷机械有限责任公司 一种新型印刷机压印滚筒设计方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2206186A (en) † 1938-07-29 1940-07-02 Hantjopoulos George Rotary printing press
DE2357538A1 (de) † 1973-11-17 1975-05-22 Maschf Augsburg Nuernberg Ag Druckzylinder fuer rotationsdruckmaschinen, insbesondere tiefdruckmaschinen
DE2151650B2 (de) † 1971-10-16 1976-03-11 Maschinenfabrik Augsburg-Nürnberg AG, 8900 Augsburg Zylinder eines offset-rotationsdruckwerks
US4934266A (en) † 1987-09-11 1990-06-19 Officine Meccaniche G. Cerutti S.P.A. Printing roller for a rotary press
JPH0825606A (ja) † 1994-07-19 1996-01-30 Dainippon Printing Co Ltd 印刷ユニット

Family Cites Families (13)

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CH355786A (de) 1958-01-24 1961-07-31 Winkler Fallert & Co Maschf Maschine zum Bedrucken von Papier und andern Stoffen in Bahnen mittels Tiefdruckwalzen
DE1425902C3 (de) 1964-01-22 1979-06-21 Artos Dr.-Ing. Meier-Windhorst Kg, 2105 Seevetal Rohrmantelwalze, insbesondere für Foulards
DE3540912A1 (de) * 1985-11-19 1987-05-21 Roland Man Druckmasch Vorrichtung zum seitlichen transportieren ueberschuessiger farbe, farb-/wasseremulsion oder wasser
DE3735438C1 (de) * 1987-10-20 1989-05-18 Kleinewefers Gmbh Verfahren zum Betrieb eines Kalanders und Kalander zur Durchfuehrung dieses Verfahrens
US5429048A (en) * 1989-10-05 1995-07-04 Gaffney; John M. Offset lithographic printing press
US5311814A (en) * 1993-06-28 1994-05-17 Jacob Kierson Assembly for embossing a pattern on surfaces of a slat used in a vertical blind assembly
DE4436973C2 (de) * 1993-12-21 2003-06-26 Heidelberger Druckmasch Ag Gummituch mit variierendem Profil und Verfahren zu seiner Herstellung
US6105498A (en) * 1993-12-21 2000-08-22 Heidelberger Druckmaschinen Ag Varying profile cylinder blanket
DE4432816A1 (de) * 1994-09-15 1996-03-21 Roland Man Druckmasch Druckwalze für den kanallosen Druck
JP3484861B2 (ja) * 1995-03-31 2004-01-06 セイコーエプソン株式会社 画像形成装置用のローラ及びその成形用金型
US5711222A (en) * 1996-06-14 1998-01-27 Heidelberger Druckmaschinen Ag Method and apparatus for mounting a flat printing plate on a cantilevered plate cylinder of a printing press
JP3510452B2 (ja) * 1997-05-13 2004-03-29 三菱重工業株式会社 印刷機，印刷ユニットおよび筒状ブランケットセット
JP3670453B2 (ja) * 1997-08-25 2005-07-13 富士写真フイルム株式会社 搬送ローラ構造

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2206186A (en) † 1938-07-29 1940-07-02 Hantjopoulos George Rotary printing press
DE2151650B2 (de) † 1971-10-16 1976-03-11 Maschinenfabrik Augsburg-Nürnberg AG, 8900 Augsburg Zylinder eines offset-rotationsdruckwerks
DE2357538A1 (de) † 1973-11-17 1975-05-22 Maschf Augsburg Nuernberg Ag Druckzylinder fuer rotationsdruckmaschinen, insbesondere tiefdruckmaschinen
US4934266A (en) † 1987-09-11 1990-06-19 Officine Meccaniche G. Cerutti S.P.A. Printing roller for a rotary press
JPH0825606A (ja) † 1994-07-19 1996-01-30 Dainippon Printing Co Ltd 印刷ユニット

Also Published As

Publication number Publication date
DE50308104D1 (de) 2007-10-18
JP2004188967A (ja) 2004-07-08
US20040139871A1 (en) 2004-07-22
DE10257746B3 (de) 2004-06-24
DE20321665U1 (de) 2008-09-25
EP1428658A1 (fr) 2004-06-16
EP1428658B1 (fr) 2007-09-05
US6860200B2 (en) 2005-03-01

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