EP2879878B1 - Procédé de réglage de la longueur d'impression d'une image d'impression dans une rotative polychrome - Google Patents

Procédé de réglage de la longueur d'impression d'une image d'impression dans une rotative polychrome Download PDF

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Publication number
EP2879878B1
EP2879878B1 EP13745820.4A EP13745820A EP2879878B1 EP 2879878 B1 EP2879878 B1 EP 2879878B1 EP 13745820 A EP13745820 A EP 13745820A EP 2879878 B1 EP2879878 B1 EP 2879878B1
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EP
European Patent Office
Prior art keywords
cylinder
format
circumferential speed
changed
format cylinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP13745820.4A
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German (de)
English (en)
Other versions
EP2879878B8 (fr
EP2879878A2 (fr
Inventor
Mario FRANKENBERG
Rainer Ehrenberg
Frank Westhof
Uwe HÖWELMEYER
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.)
EHRENBERG, RAINER
Frankenberg Mario
HOEWELMEYER, UWE
WESTHOF, FRANK
Windmoeller and Hoelscher KG
Original Assignee
Windmoeller and Hoelscher KG
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Publication date
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Publication of EP2879878A2 publication Critical patent/EP2879878A2/fr
Application granted granted Critical
Publication of EP2879878B1 publication Critical patent/EP2879878B1/fr
Publication of EP2879878B8 publication Critical patent/EP2879878B8/fr
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Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F5/00—Rotary letterpress machines
    • B41F5/24—Rotary letterpress machines for flexographic printing
    • 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
    • B41F13/12—Registering devices
    • B41F13/14—Registering devices with means for displacing the cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0081—Devices for scanning register marks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2200/00—Printing processes
    • B41P2200/10—Relief printing
    • B41P2200/12—Flexographic printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2213/00—Arrangements for actuating or driving printing presses; Auxiliary devices or processes
    • B41P2213/70—Driving devices associated with particular installations or situations
    • B41P2213/73—Driving devices for multicolour presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2233/00—Arrangements for the operation of printing presses
    • B41P2233/50—Marks on printed material
    • B41P2233/52—Marks on printed material for registering

Definitions

  • the invention relates to a method for adjusting the printing length of a printed image in a multicolor rotary printing press according to the preamble of claim 1.
  • the multicolor printed image is transferred to the printing substrate by successively transferring a plurality of printing cylinders, the so-called format cylinders, one color each onto the printing substrate, wherein the areas of the format cylinders carrying the ink deliver this ink completely or partially to the printing material.
  • Several overlapping colors eventually lead to the printed image.
  • the printing material is guided over one or more impression cylinders. If a single counter-pressure cylinder is present, then the format cylinders are employed on this counter-pressure cylinder, so that the printing inks can be completely transferred as far as possible. If there are several impression cylinders, then each impression cylinder is often assigned a single format cylinder. It can be assigned to each impression cylinder but also two or even more format cylinder.
  • peripheral speeds of all format cylinders should be identical and also coincide with the or the peripheral speeds of the impression cylinder or cylinders.
  • each individual cylinder is its own, position-controlled Drive equipped so that the peripheral speed can be set very accurately.
  • a high print quality is achieved.
  • the format cylinder or parts thereof - in particular the so-called sleeve - is usually to be exchanged for a larger or smaller circumference.
  • the register is subsequently readjusted, which is reflected both in the DE 195 27 199 A1 as well as in the EP 2 392 459 A1 is described.
  • the readjustment of the register leads to a waste of paper.
  • the object of the present invention is therefore to propose a method with which the spoiling accident is avoided.
  • the peripheral speed of the first format cylinder is changed according to the invention during the current printing operation relative to the peripheral speed of the impression cylinder.
  • the control and / or regulating device which advantageously runs as a program on a control computer, the amount of the desired peripheral speed of the forme cylinder or the desired deviation from the peripheral speed of the impression cylinder can be communicated. This can be done manually or according to a table which contains such values as a function of the time and / or the length of the already printed web length. It is also conceivable, however, a mathematical function or an empirically determined dependence, as in the cited document US Pat. No. 7,584,699 B2 is proposed. If the peripheral speed of the format cylinder is reduced relative to the peripheral speed of the impression cylinder, the result is an extended print image; however, if the peripheral speed of the format cylinder is increased, a shortened printed image is observed.
  • Flexographic printing is a high pressure process, i. the raised areas of the printing plate or printing plate are the printing areas.
  • the printing plates consist of flexible materials such as polymers, so that the printing plates can handle the bending stress caused by the slightly different peripheral speeds of the format cylinder and counterpressure roller.
  • each monochrome subpictures are to be printed to match the expression made by the first format cylinder with its changed speed.
  • the peripheral speeds of these format cylinders should be identical at least after a few revolutions.
  • not only at least one other, but all other format cylinders are changed simultaneously in their peripheral speeds with the first format cylinder.
  • the circumferential velocities mean the desired circumferential speeds.
  • the target peripheral speeds depend on the peripheral speed of the impression cylinder or cylinders and are only slightly changed relative to its or their peripheral speeds.
  • the actual peripheral speeds of the format cylinders can deviate from the desired speeds, as will be described below, since even further adjustment parameters influence the actual circumferential speed.
  • a well-adjusted longitudinal register ensures that the individual colors of a printed image are printed one above the other and thus form the desired printed image.
  • At least part of the printed image printed by the first format cylinder has the original circumferential speed, that is, the original print length. If another format cylinder, which has already been operated at a modified printing speed, now prints over this printed image, an error inevitably occurs in the longitudinal register. In this way waste is produced, which should be avoided.
  • a suitable measure to avoid waste is to control the other format cylinder as follows: Simultaneously with the specification of a new target peripheral speed, the longitudinal register is controlled, in the manner that despite changing the peripheral speed, the longitudinal register is maintained or at least only briefly disturbed.
  • Entirely without loss of waste can be managed if the control of the longitudinal register is carried out so that this also makes a change in the target peripheral speed, wherein the predetermined by the longitudinal register target peripheral speed in terms of magnitude is just as large as the change in the target peripheral speed for generating another print length, but this change counteracts. As a result, a peripheral speed which corresponds to the original peripheral speed remains.
  • the control of the longitudinal register is maintained until the point on the substrate at which the printed image begins with a changed printing length reaches the nip between the other format cylinder and the impression cylinder.
  • a control and / or regulation program which comprises a plurality of procedures.
  • procedures in the context of this application individual, program parts referred to fulfill a specific function. Such procedures can also be called functions. In the field of computer science but can also find other names for this.
  • Such a procedure can be used, for example, to control the target peripheral speeds and, for example, to receive the desired print length as input parameters.
  • a result would then be a value for the target circumferential speed, which is then transferred to the program part responsible for the position control of a format roller.
  • Another procedure intended for longitudinal registration of master cylinders may also set the value of the target peripheral speed calculate and this value provided with opposite sign and also calculate the length of time for the length of the longitudinal register setting in dependence on the position of the driven forme cylinder. These two values are also transferred to the program part responsible for the position control.
  • the two values for the differences of the target circumferential speed and the current peripheral speed of the impression cylinder are added to the current speed as a function of the advanced time t. If the time .DELTA.t has expired, the difference between the original peripheral speed and the target speed for changing the longitudinal register is equal to zero, so that the affected format cylinder is now in registration with the new target circumferential speed required to change the printing length, without the print image would have ever run out of the register.
  • the invention further comprises a control and / or regulating device, in which the program parts described above are implemented, and a printing machine, which comprises a said control and / or regulating device.
  • This printing machine is also equipped with one or more, a printing material transporting counter-pressure cylinders to which or to which one or more format cylinders are adjustable. In a particularly advantageous embodiment, this is a central cylinder flexographic printing machine.
  • the printing material is in particular a plastic web.
  • FIG. 1 shows a schematic representation of a flexographic printing machine 1, which comprises a central impression cylinder 2.
  • a printing material web 3 is fed in the direction of the arrow T, which is placed on the impression cylinder 2 by means of a pressure roller 4.
  • To the circumference of the impression cylinder 2 are several, in the illustrated embodiment 4, format cylinder 5, 6, 7, 8 distributed, each printing a color.
  • components of each printing machine include ink supply means for supplying the raised printing areas of the form cylinder with ink.
  • such a device generally comprises an anilox roller for coloring the printing areas and a doctoring chamber cooperating with the anilox roller.
  • FIG. 1 Components of the flexographic printing machine 1 shown, which serve the drive of cylinders.
  • the impression cylinder 2 is driven by its own drive 12.
  • the letter M stands for "motor". Even if the motor is operated with a given power that should lead to a constant speed, it can lead to synchronized fluctuations.
  • a speed detection device is provided, which is designated overall by the reference numeral 22 and which comprises a sensor 23, with which the markings 24 which are arranged on the impression cylinder 2, can be detected.
  • the detected markings are supplied to the evaluation and control unit 26 via a data line 25, which evaluates therefrom the markings detected per unit of time and from this determines the actual angular and circumferential speed. If there is a deviation from the desired angular velocity, the motor can be controlled accordingly, so that the target and actual speeds equalize. In this case, a controlled system is available. From the evaluation and control unit 26 performs a control line to the engine 12th
  • the individual format cylinders should in flexographic printing presses of the prior art at any time have the same peripheral speeds as the central impression cylinder 2.
  • the same controlled system is provided as for the impression cylinder 2.
  • Such a controlled system is shown only for the format cylinder 5, but at other format cylinders also available.
  • the drive carries in the case of the format cylinder 5, the reference numeral 15.
  • the control device here also includes the markers 31, the sensor 32 and the control line 33, which forwards the number of measured by the sensor marking to the evaluation and control unit 26. The latter sets these measurements in relation to a time unit and in turn determines the current peripheral speed of the format cylinder 5.
  • the current peripheral speed is compared with a desired speed, in which case the target speed is not a predetermined speed, but the actual speed of the impression cylinder. This procedure ensures that the peripheral speeds of the impression cylinder and the format cylinder are always the same.
  • the circumferential speeds of the format cylinders 5, 6, 7, 8 are changed relative to the impression cylinder, the corresponding differences are then added to the desired speeds of the format cylinders. These differences can result in a higher peripheral speed, resulting in a slightly shortened print length. Conversely, a reduced peripheral speeds leads to a prolonged printed image.
  • FIG. 2 An embodiment of a circuit or a program sequence is in the FIG. 2 shown.
  • the individual boxes of this figure are accordingly to be understood as circuit components or parts of a program, for example as procedures.
  • This controls the drive of a format cylinder.
  • the basis of the control of the drive the current peripheral speed of the impression cylinder.
  • path GDZ the distance traveled per unit time path of the impression cylinder
  • the total distance is multiplied by a factor which is greater or less than 1. This is done in the multiplier shown as box 500.
  • the result is a guideline that the scope of the format cylinder has to cover in a unit of time.
  • the motor M is controlled according to this specification.
  • FIG. 3 a procedure is shown, with the speed difference for all format cylinder réelleschbar at the same time, with a longitudinal register deviation is avoided.
  • the speed difference ⁇ v to the new speed v 2 is determined.
  • a resulting velocity curve is in the FIG. 3 a) shown, in which simply the peripheral speed of the respective forme cylinder was changed from v 1 to v 2 at a time t start .
  • this difference path is taken into account as a longitudinal register path to be corrected.
  • this longitudinal register path is now taken into account for as long as the printing material at a given peripheral speed is taken into account by the first format cylinder (see reference numeral 5 in FIG. 1 ) needs to be adjusted to the format cylinder.
  • the time required for this results at a given circumferential speed of the impression cylinder, which is equal to v 1 is, from the radius of the impression cylinder, which is a constant. Accordingly, the longitudinal register path is considered until the time t end .
  • time t start is the same for all format cylinders, the time t end depends on the spatial position of the respective format cylinder relative to the impression cylinder. Since no sensory measured values are used in this procedure for the adjustment of the longitudinal register, one can speak here of a correction of a virtual longitudinal register error. Such a correction of the longitudinal register error is in the FIG. 3 b) shown.
  • FIG. 3 c) now shows the resulting velocity curve for the considered format cylinder.
  • the speed difference ⁇ v and the speed change caused by the longitudinal register correction cancel each other out, so that the peripheral speed v 1 is maintained between the times t start and t end .
  • a printing press is the subject of the invention, in which an evaluation and control unit 26 is equipped with the described functions. So this evaluation and

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)

Claims (5)

  1. Procédé d'établissement de la longueur d'impression d'une image d'impression dans une machine rotative d'impression en plusieurs couleurs, en particulier dans une machine de flexographie, qui présente un premier cylindre "de format" ou d'impression et au moins un autre cylindre de format,
    les cylindres de format étant disposés contre un cylindre complémentaire d'impression commun ou contre plusieurs cylindres complémentaires d'impression par lesquels le matériau à imprimer est guidé et
    la vitesse périphérique du premier cylindre de format est ajustée par rapport à la vitesse périphérique du cylindre complémentaire d'impression,
    la vitesse périphérique du premier cylindre de format étant modifiée en fonctionnement permanent d'impression par rapport à la vitesse périphérique du cylindre complémentaire d'impression et
    le registre longitudinal de chaque cylindre de format dont la vitesse périphérique est modifiée étant également ajusté,
    caractérisé en ce que
    pour le cylindre de format concerné, la modification de la vitesse périphérique et l'établissement du registre longitudinal s'effectuent simultanément,
    en ce qu'un programme de commande et de régulation qui présente au moins une procédure de commande de la vitesse périphérique et au moins une procédure de commande du registre longitudinal est utilisé et
    en ce que la procédure de commande du registre longitudinal est appelée en même temps que l'appel de la procédure de commande de la vitesse périphérique qui définit comme nouvelle valeur de commande la valeur modifiée de la vitesse périphérique.
  2. Procédé selon la revendication 1, caractérisé en ce que la vitesse périphérique d'au moins un autre cylindre de format est modifiée en même temps que la modification de la vitesse périphérique du premier cylindre de format.
  3. Procédé selon la revendication précédente, caractérisé en ce que la vitesse périphérique de tous les autres cylindres de format est modifiée en même temps que la modification de la vitesse périphérique du premier cylindre de format.
  4. Procédé selon l'une des deux revendications précédentes, caractérisé en ce que le premier cylindre de format et le ou les autres cylindres de format ou tous les autres cylindres de format ont la même vitesse périphérique.
  5. Procédé selon l'une des revendications précédentes, caractérisé en ce que la modification de la vitesse périphérique nécessaire pour établir le registre longitudinal présente la même valeur mais le signal opposé de la vitesse périphérique modifiée que l'on souhaite pour le cylindre de format.
EP13745820.4A 2012-07-31 2013-07-31 Procédé de réglage de la longueur d'impression d'une image d'impression dans une rotative polychrome Active EP2879878B8 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201261677608P 2012-07-31 2012-07-31
PCT/EP2013/066127 WO2014020083A2 (fr) 2012-07-31 2013-07-31 Procédé de réglage de la longueur d'impression d'une image d'impression dans une rotative polychrome

Publications (3)

Publication Number Publication Date
EP2879878A2 EP2879878A2 (fr) 2015-06-10
EP2879878B1 true EP2879878B1 (fr) 2016-06-15
EP2879878B8 EP2879878B8 (fr) 2016-09-14

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EP13745820.4A Active EP2879878B8 (fr) 2012-07-31 2013-07-31 Procédé de réglage de la longueur d'impression d'une image d'impression dans une rotative polychrome

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US (1) US9789680B2 (fr)
EP (1) EP2879878B8 (fr)
ES (1) ES2590654T3 (fr)
WO (1) WO2014020083A2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012103853B4 (de) * 2012-05-02 2022-10-13 Windmöller & Hölscher Kg Verfahren für die parallele Ausrichtung von wenigstens zwei Zylindern zueinander sowie Kalibriervorrichtung
JP6270133B2 (ja) * 2014-02-12 2018-01-31 株式会社小森コーポレーション フレキシブル電子デバイス製造装置
WO2016028801A2 (fr) * 2014-08-19 2016-02-25 Mark Andy, Inc. Procédé et appareil permettant d'améliorer la fidélité d'images imprimées ou formées par rapport à leur dessin modèle d'origine
JP7156198B2 (ja) * 2019-07-25 2022-10-19 株式会社村田製作所 グラビア印刷装置および積層セラミックコンデンサの製造方法
US12044970B2 (en) 2020-06-19 2024-07-23 Eastman Kodak Company Flexographic printing with repeating tile including different randomly-positioned feature shapes
US12007690B2 (en) 2020-06-19 2024-06-11 Eastman Kodak Company Flexographic printing with repeating tile of randomnly-positioned feature shapes

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
DE19527199C2 (de) 1995-07-26 2002-10-31 Baumueller Nuernberg Gmbh Flexodruckmaschine und deren Verwendung
DE19611048A1 (de) 1996-03-20 1997-09-25 Windmoeller & Hoelscher Druckmaschine, vorzugsweise Flexodruckmaschine
US7384505B2 (en) * 2003-10-30 2008-06-10 Sca Hygiene Products Gmbh Method of manufacturing a hygiene paper product, apparatus for such manufacture and hygiene paper product
CN101415555B (zh) 2004-07-10 2011-07-13 克劳佩塑料制品有限公司 印刷的可伸展材料中印刷重复长度变化的校正方法
DE102006003013B4 (de) 2005-06-17 2011-03-03 Koenig & Bauer Aktiengesellschaft Flexodruckmaschine
ES2424891T3 (es) * 2006-10-23 2013-10-09 Bobst Bielefeld Gmbh Bastidor de montaje y procedimiento para ajustar un cilindro
US8844437B2 (en) * 2007-04-27 2014-09-30 Kimberly-Clark Worldwide, Inc. Process and system for aligning printed images with perforated sheets
GB0900431D0 (en) 2009-01-12 2009-02-11 Emerson & Renwick Ltd Printing methods and related apparatus
CN102481214A (zh) * 2009-08-21 2012-05-30 宝洁公司 具有不同和相同图形的吸收制品以及用于印刷此类吸收制品的设备和方法
EP2392459B1 (fr) 2010-06-02 2015-09-02 Müller Martini Holding AG Procédé et dispositif de réglage du registre d'une presse d' impression
EP2857197B1 (fr) * 2013-10-07 2016-03-16 Comexi Group Industries, S.A.U Machine d'impression avec tambour d'impression central

Also Published As

Publication number Publication date
WO2014020083A3 (fr) 2014-03-27
EP2879878B8 (fr) 2016-09-14
WO2014020083A2 (fr) 2014-02-06
US20150183206A1 (en) 2015-07-02
US9789680B2 (en) 2017-10-17
ES2590654T3 (es) 2016-11-23
EP2879878A2 (fr) 2015-06-10

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