EP2119563A2 - Unité d'impression d'une imprimante - Google Patents

Unité d'impression d'une imprimante Download PDF

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Publication number
EP2119563A2
EP2119563A2 EP09159993A EP09159993A EP2119563A2 EP 2119563 A2 EP2119563 A2 EP 2119563A2 EP 09159993 A EP09159993 A EP 09159993A EP 09159993 A EP09159993 A EP 09159993A EP 2119563 A2 EP2119563 A2 EP 2119563A2
Authority
EP
European Patent Office
Prior art keywords
printing unit
cylinder
transfer cylinder
printing
drive gear
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.)
Withdrawn
Application number
EP09159993A
Other languages
German (de)
English (en)
Inventor
Josef Singler
Georg Schmid
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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Manroland AG filed Critical Manroland AG
Publication of EP2119563A2 publication Critical patent/EP2119563A2/fr
Withdrawn legal-status Critical Current

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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
    • B41F13/008—Mechanical features of drives, e.g. gears, clutches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/004—Driving means for ink rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/02—Rotary lithographic machines for offset printing
    • B41F7/12—Rotary lithographic machines for offset printing using two cylinders one of which serves two functions, e.g. as a transfer and impression cylinder in perfecting machines

Definitions

  • the invention relates to a printing unit of a printing press according to the preamble of claim 1.
  • each printing unit having a transfer cylinder, a plate cylinder, an inking unit and optionally a dampening unit.
  • the form cylinder are also referred to as a plate cylinder and the transfer cylinder as a rubber cylinder.
  • a counter-pressure cylinder With the transfer cylinder or blanket cylinder of a printing unit acts to form a printing nip for the printing substrate together a counter-pressure cylinder, wherein it may be in the impression cylinder to a satellite cylinder or a transfer cylinder or blanket cylinder of an adjacent printing unit.
  • a satellite cylinder usually interacts with several transfer cylinders of different printing units.
  • the impression cylinder which interacts with the transfer cylinder of a printing unit, is referred to as a printing cylinder.
  • Fig. 1 shows a schematic representation of a known from the prior art printing unit 10 of a web press with two printing units 11, 12 for printing on both sides of a printing substrate 13, wherein each of the two printing units 11, 12 a transfer cylinder 14, a forme cylinder 15, an inking unit 16 and a dampening unit 17 includes.
  • the transfer cylinder 14 of the printing unit 11 forms the impression cylinder for the transfer cylinder 14 of the printing unit 12
  • the transfer cylinder 14 of the printing unit 12 forms the impression cylinder for the transfer cylinder 14 of the printing unit 11th
  • the transfer cylinder 14 of the printing unit 12 is associated with a drive motor 18 which drives into the transfer cylinder 14 of the printing unit 12.
  • the drive motor 18 of the printing unit 10 of Fig. 1 serves the drive of the transfer cylinder 14, the forme cylinder 15, the inking units 16 and the dampening 17 of both printing units 11, 12, wherein the drive of these assemblies by means of the drive motor 18 by means of meshing drive gears is accomplished.
  • intermeshing drive gears are shown in phantom.
  • a drive gear 18 associated with the drive gear drives in a the transfer cylinder 14 of the printing unit 12 associated drive gear.
  • the drive gear of the transfer cylinder 14 of the printing unit 12 drives in a the form cylinder 15 of the printing unit 12 associated drive gear and in a transfer cylinder 14 of the printing unit 11 associated drive gear, wherein the drive gear 14 of the printing unit 11 drives in a form of the cylinder 15 of the printing unit 11 associated drive gear
  • Fig. 1 drive the drive gears of the forme cylinder 15 of the printing unit 11, 12 via a respective intermediate 19 in an inking unit of the inking unit 16 of the respective printing unit 11, 12 associated drive gear.
  • about other drive gears and the dampening unit 17 of the printing unit 11 is driven.
  • the inking units 16 of the printing units 11, 12 are driven by intermeshing drive gears, in each case via the forme cylinders 15 of the printing units 11, 12 associated drive gears.
  • the circumference of the respective transfer cylinder 14 is an integral multiple of the circumference of the respective forme cylinder 15.
  • the form of cylinders 15 of the printing units 11, 12 are therefore slender form cylinder 15 with a relatively small diameter and a relatively large axial extension, whereby they tend to sag.
  • the present invention has the object to provide a novel printing unit of a printing machine, in which a better print quality can be achieved with slim cylinders.
  • This object is achieved by a printing unit of a printing press according to claim 1.
  • the inking unit of the or each printing unit from the transfer cylinder of the respective printing unit via intermeshing drive gears can be driven so that the drive connection between the transfer cylinder and inking unit of the respective printing unit is independent of the drive connection between transfer cylinder and forme cylinder of the respective printing unit.
  • the inking unit of each printing unit is therefore not driven via the forme cylinder of the respective printing unit but rather via the transfer cylinder of the respective printing unit.
  • the printing unit according to the invention there is no mechanical drive connection in the area of the printing units via gears between the forme cylinders and the printing units. Since the transfer cylinder circumference is an integer multiple of the forme cylinder circumference and therefore the transfer cylinders are more rigid overall, can be avoided with the present invention in printing units with slim cylinders Dublieren and therefore the print quality can be increased.
  • Fig. 2 shows a schematic representation of a printing unit 20 according to the invention of a web-fed printing press with two printing units 21, 22, which in turn serve the double-sided printing of a printing substrate 23.
  • Each of the printing units 21, 22 of the printing unit 20 of the Fig. 2 In turn, each has a transfer cylinder 24, a forme cylinder 25, a printing unit 26 and a dampening unit 27, wherein a transfer cylinder circumference of the transfer cylinder 24 is an integer multiple of a forme cylinder circumference of the respective forme cylinder 25.
  • the printing unit 22 is in turn associated with a drive motor 28 which drives into the transfer cylinder 24 of the printing unit 22, for which purpose both the drive motor 28 and the transfer cylinder 24 meshing drive gears are assigned.
  • a drive motor 28 which drives into the transfer cylinder 24 of the printing unit 22, for which purpose both the drive motor 28 and the transfer cylinder 24 meshing drive gears are assigned.
  • Fig. 2 can be removed, in which drive gears are shown in phantom, drives the transfer cylinder 24 of the printing unit 22 associated drive gear in a form of the cylinder 25 of the printing unit 22 associated drive gear directly.
  • Fig. 2 are in the range of each printing unit 21, 22, the inking units 26 each driven by the transfer cylinder 24 via intermeshing drive gears, for this purpose in the embodiment of Fig. 2 two intermediate wheels 29, 30 are present, in order to collect indirectly from the transfer cylinder 24 into the respective inking unit 26.
  • the drive connection between the transfer cylinder 24 and the inking units 26 of the printing units 21, 22 regardless of the drive connection between the transfer cylinder 24 and the forme cylinder 25 of the respective printing unit 21, 22, but wherein the intermediate gear 29 and the drive gear of the Camming cylinder 25 respectively in the drive gear of the transfer cylinder 24.
  • torque fluctuations in the inking unit 26 are not transmitted to the relatively slender form cylinder 25, but rather intercepted in the region of the rigid transfer cylinder 24 whose circumference is an integer multiple of the circumference of the forme cylinder 25.
  • Fig. 3 shows a section of the printing unit 20 in the region of the transfer cylinder 24 and the forme cylinder 25.
  • the forme cylinder 25 and the transfer cylinder 24 are rotatably mounted on their illustrated cylinder pins 31 and 32 via bearings 33 and 34 on a side wall 35.
  • Fig. 3 shows exemplarily for the drive gears 37 of the transfer cylinders 24 that they are fixed to the respective cylinder pin 32 of the transfer cylinder 24 by means of clamping elements 38 which provide a torque connection between the respective drive gear and the respective cylinder pin.
  • each printing unit 21, 22 mesh the drive gears 36 and 37 of form cylinder 24 and transfer cylinder 25 into each other.
  • This gearing is in principle subject to play. However, the backlash must not be effective to avoid printing problems.
  • the idler gear 39 has an identical gear geometry as the drive gear 37 of the transfer cylinder 24 to which the idler gear 39 is associated. Furthermore, the idler gear 39 meshes with the drive gear 36 of the forme cylinder 25 as well as the drive gear 37 of the transfer cylinder 24.
  • each printing unit 21, 22 associated with the respective drive gear 37 of the respective transfer cylinder 24 incident gear 39 and the respective drive gear 37 associated adjusting disk 40 is connected to the drive gear 37 via bending bars 41 formed as spring elements or bending elements.
  • the bending bars 41 are positioned equally distributed over the circumference of the drive gear 37, along with the gear 39 and the adjusting plate 40, wherein the bending rods 41 extend in the axial direction and the adjusting plate 40, the idler gear 39 and the drive gear 37 of the transfer cylinder 24 penetrate.
  • the idler gear 39 is bolted to the drive gear 37 at a first side thereof via flexures 41.
  • the adjusting plate 40 is screwed via the bending rods 41 with the drive gear 37 on a second side thereof.
  • the accompanying gear 39 and the adjusting disc 40 thus engage on opposite sides of the respective drive gear 37 on the same.
  • the accompanying gear 39 is rotatable relative to the drive gear 37 of the respective transfer cylinder 24.
  • the rotation of the adjusting plate 40 relative to the respective drive gear 37 and thus the rotation of the associated gear 39 with respect to the same takes place such that when, on the one hand, the drive gears 37, 36 and on the other hand, the drive gear 37 associated with the co-operating gear 39 mesh with the drive gear 36, driving tooth flanks of the two drive gears 37, 36 of transfer cylinder 24 and form cylinder 25 abut each other and continue non-driving tooth flanks of the incident gear 39 abut non-driving tooth flanks of the drive gear 36 of the respective plate cylinder 35 of the printing unit 21 and 22 respectively.
  • the teeth, which are subject to play in principle, between the two meshing drive gears 36, 37 of transfer cylinder 24 and forme cylinder 25 can be held free of play in the region of each printing unit.
  • the adjusting disk 40 is assigned an eccentric 42.
  • a sliding bearing is formed, in particular a plastic plain bearing to prevent solidification of these only slightly moving relative to each other components.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
EP09159993A 2008-05-15 2009-05-12 Unité d'impression d'une imprimante Withdrawn EP2119563A2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008023716A DE102008023716A1 (de) 2008-05-15 2008-05-15 Druckeinheit einer Druckmaschine

Publications (1)

Publication Number Publication Date
EP2119563A2 true EP2119563A2 (fr) 2009-11-18

Family

ID=41109924

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09159993A Withdrawn EP2119563A2 (fr) 2008-05-15 2009-05-12 Unité d'impression d'une imprimante

Country Status (3)

Country Link
US (1) US20100107911A1 (fr)
EP (1) EP2119563A2 (fr)
DE (1) DE102008023716A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120247354A1 (en) * 2011-03-29 2012-10-04 Surbrook Louis M Perfecting printing unit and tower

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2649734A (en) * 1949-10-10 1953-08-25 Ras Max Rotary multicolor transfer printing machine
DE1296145B (de) * 1966-03-23 1969-05-29 Maschf Augsburg Nuernberg Ag Antrieb fuer ein Dreizylinder-Rotations-Offsetdruckwerk
US3698313A (en) * 1970-06-25 1972-10-17 North American Rockwell Means for oscillating and silencing a ductor roller in a printing press
DD132253A1 (de) * 1977-03-11 1978-09-13 Heinz Skiera Farbwerksantrieb
US4198908A (en) * 1977-03-11 1980-04-22 Veb Polygraph Druckmaschinenwerke Leipzig Drive for an ink supplying device of a rotary printing press

Also Published As

Publication number Publication date
US20100107911A1 (en) 2010-05-06
DE102008023716A1 (de) 2009-11-26

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