EP2523809B1 - Procédé et dispositif destinés à optimiser la position relative d'au moins deux cylindres d'impression - Google Patents

Procédé et dispositif destinés à optimiser la position relative d'au moins deux cylindres d'impression Download PDF

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Publication number
EP2523809B1
EP2523809B1 EP11700822.7A EP11700822A EP2523809B1 EP 2523809 B1 EP2523809 B1 EP 2523809B1 EP 11700822 A EP11700822 A EP 11700822A EP 2523809 B1 EP2523809 B1 EP 2523809B1
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European Patent Office
Prior art keywords
printing
values
cylinder
der
unit
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EP11700822.7A
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German (de)
English (en)
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EP2523809A1 (fr
Inventor
Björn Weidmann
Holger Delere
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Windmoeller and Hoelscher KG
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Windmoeller and Hoelscher KG
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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
    • 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
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/24—Cylinder-tripping devices; Cylinder-impression adjustments
    • B41F13/26—Arrangement of cylinder bearings
    • B41F13/30—Bearings mounted on sliding supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0072—Devices for measuring the pressure between cylinders or bearer rings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/02—Arrangements of indicating devices, e.g. counters
    • 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

Definitions

  • the invention relates to a method according to the preamble of claim 1 and a device according to the preamble of claim 6.
  • Such methods and devices are used in printing machines and especially in flexographic printing presses for adjusting the distance of the cylinders involved in the printing process. Only when this distance is optimized, it comes to the order of a printed image, in which the ink transfer is in the desired range.
  • the EP 1249346 A1 proposes for this purpose, to examine the printed image, which comes after the hiring of the cylinder involved in the printing process against each other, with an optical sensor. Based on the results, the employment is optimized. This procedure leads to good starting results. However, at the beginning of the printing process, images of inferior quality are often printed until the job is optimized.
  • the EP 1 916 102 A1 To measure the topography of the printing plate or the printing cylinder with a laser or by mechanical scanning and in this way to obtain values that can be used in the printing press before starting the printing operation for adjusting the printing cylinder. In this measurement of the surface of the printing plate cylinder, however, a number of factors that affect the transfer of color in the printing operation, not taken into account. These factors include the behavior of the printing plate under the conditions prevailing in the printing gap and the Change almost all physical characteristics of the pressure in the current printing operation. In particular, in order to maintain a proper employment, it has been known for some time to monitor the pressure in the nip during the printing process. The EP 0 867 281 A1 suggests this for a flexographic printing machine.
  • the DE 10 2008 025 287 A1 discloses a method for adjusting the pressure in a nip at which the width of the print zone is measured.
  • a flat sensor carrier is inserted into the nip.
  • two pressure sensors are mounted at a certain distance from each other. With these pressure sensors, the pressure in the pressure gap can be measured and determine how wide the zone is, in which a certain minimum pressure is not exceeded.
  • the WO 2008/028516 A1 discloses a method and apparatus for determining the properties of a nip. With an optical measuring device, the rotational speeds of both rolls can be determined. From these measured values, the specific properties of the pressure gap can be determined.
  • the object of the present invention is to remedy these disadvantages.
  • the invention of the DE 10 2008 025 287 A1 According to their teachings, the optimization of the relative position - before the printing operation - is performed on the basis of measured values.
  • the present invention accordingly achieves the object by recording measured values which comprise first values relative to the size of the surface with which at least one of the cylinders involved in the printing process touches another body. This may once be the absolute size of this area meant. Of this size, however, a share of a possible contact surface can be derived.
  • the method according to the invention can also be used during printing operation under certain conditions. In this case, the present invention makes use of the fact that, in particular in the gravure or high-pressure processes, it depends on which components of the printing form touch the printing material in the printing nip. When high pressure printing the raised areas of the printing form during gravure printing in the engraved areas color transported and also transferred to the substrate.
  • an additional measuring body which is otherwise not involved in the printing process. If such a further body has the same distance from a printing cylinder as the respective other of the at least two printing group cylinders, the optimization of the relative position of the two cylinders relative to one another can easily be carried out with the aid of the measured values of the further body.
  • the further body can also be one of the at least two printing cylinder. If the at least two printing cylinders of the printing plate and the impression cylinder, so often touch these under the intermediary of the printing material.
  • the so-called area coverage that is, the proportion of the print image is actually transferred to the substrate when the plate cylinder is in turn fully colored, by a measurement on the printing plate cylinder and not on the substrate such as for the doctrine of EP 1249346 A1 be determined.
  • This possibility is very advantageous, since the completeness of the image transfer is of course exactly the size that one intends to optimize by setting the relative position.
  • second values are also measured for a second size.
  • the second measurement values may be pressure values that are expressed, for example, in eleven exposed areas of the nip. It is also possible with a flexible printing plate print marks on the substrate profundchristen and to use the increase in area of the pressure point as a result of an increase of Anstell füres as a second value. Alternatively, the positions of the roller bearings could also be assigned as second values to the respectively determined first measured values. Also, a measurement of the position of the respective roll shell - which could be done for example with optical measuring means - appears advantageous.
  • certain first values relating to the interface can be assigned to the relative position of the rollers or to pressure in the nip.
  • the determination of the second values will be limited to the front end areas of the roller.
  • the determination of the second values in addition to the first values is particularly advantageous if the determination of the first values takes place in a device which is external to the actual printing unit and is often referred to as external stretching. In this case, it can be determined in the external horizontal bar at which relative position and / or at which adjusting pressure (second values) to another body a satisfactory positioning situation (first values) is achieved.
  • the printing unit cylinder thus measured can then be positioned in the printing unit accordingly (that is to say corresponding to the second values with good first values) to the at least one other printing unit cylinder.
  • Measured values for carrying out the method according to the invention can also be obtained by recording electromagnetic radiation. Often you will record this radiation, which is reflected by the surface of one of the inking cylinder. One way is to take advantage of the effect of frustrated total reflection. For this purpose, a light-conducting body can be brought to the printing cylinder.
  • certain first values relating to the interface can be assigned to the relative position of the rollers or to pressure in the nip.
  • the determination of the second values will be limited to the front end areas of the roller.
  • the determination of the second values in addition to the first values is particularly advantageous if the determination of the first values takes place in a device which is external to the actual printing unit and is often referred to as external stretching. In this case, it can be determined in the external horizontal bar at which relative position and / or at which adjusting pressure (second values) to another body a satisfactory positioning situation (first values) is achieved.
  • the printing unit cylinder thus measured can then be positioned in the printing unit accordingly (that is to say corresponding to the second values with good first values) to the at least one other printing unit cylinder.
  • Measured values for carrying out the method according to the invention can also be obtained by recording electromagnetic radiation. Often you will record this radiation, which is reflected by the surface of one of the inking cylinder.
  • One way is to take advantage of the effect of frustrated total reflection.
  • a light-conducting body can be brought to the printing cylinder.
  • the effect of total reflection is usually weakened (especially if the surface is optically denser (higher refractive index) than the light guide and a diffuse reflection on the surface of the cylinder leads.
  • the light is diffusely reflected back into the light guide, traverses it substantially transversely to its original propagation direction, therefore hits at an acute angle to the printing cylinder remote from the surface of the light guide and therefore occurs - for lack of total reflection because of the acute angle - from the light guide out.
  • a sensor which measures the intensity of the reflected light or of the electromagnetic radiation, for example, a measured variable is obtained that depends on the size of the contact surface.
  • a further foil-like body will be provided between the cylinder surface and the total reflecting surface of the light guide, which, inter alia, has an optical density which weakens the total reflection to a suitable extent.
  • the film may be attached to the cylinder or preferably the total reflecting surface in a manner that allows for more intimate contact of the film with the total reflecting surface due to the pitch of the cylinder.
  • An apparatus for carrying out the method according to the invention has a measuring device with which the size of the surface, with which at least one printing cylinder cylinder touches a further body, can be measured.
  • a measuring device may comprise a foil which has pressure sensors each measuring the pressure in a surface section. If the resolution of this printing film is therefore sufficiently large-and thus the individual area sections are sufficiently small-even the contact of individual pressure points with the measuring device can be measured. If the number of pressure points coming into contact with the measuring device when the printing cylinder is set stagnates after a strong growth phase, the above-mentioned saturation approaches. In a device utilizing frustrated total reflection and measuring the light intensity of the diffuse reflected radiation, the measured light intensity saturates when the interface between the cylinder and the measuring device no longer grows as in the growth phase of further employment.
  • FIG. 10 a device shows a structure, the from the beam path forth FIG. 4 remind. Again, the light intensity decreases due to contact between body 5 and cylinder 21. If the body is moved by means of a rail 33 along the cylinder surface (shown by double arrow 35), again different contact areas 10 between body 5 and cylinder 21 can be covered at different times.
  • a variety of devices have been shown, in which a determination of the contact surface 9 was made by means of optical methods. If this undertaking is carried out with the aid of duck foil (pressure sensor in foil form), the printing foil takes the place of the surface of the body 5 or the roller 25, which touches the cylinder 21.
  • duck foil pressure sensor in foil form
  • FIG. 11 For example, two inking units 36 and 38 of a central cylinder flexographic printing machine with a central cylinder 40 are roughly sketched. In these color or printing works it is shown how methods according to the invention can also be used. In a Monzylinderflexodruckmaschine of the type shown, a printing material 39 is fed to a central cylinder 40 and pressed there by means of a feed roller 41.
  • the printing substrate 39 is transported by the rotation of the impression cylinder through nips 42, which the impression cylinder 40 with the Druckplattenzylindem 21 (called in flexographic printing forme cylinder) pronounced. In these nips he is 39 printed with the color of the respective printing unit, so that a multi-colored printing unit is created.
  • the direction of rotation of the cylinders 21, 40 and 37 is indicated by the arrows A, B and C.
  • the pressure in the flexographic printing process takes place here by the raised components of so-called clichés 45 - ie flexible printing forms - often as Raster points 2 are configured.
  • the clichés are often colored by so-called anilox rollers 37 - ie also printing unit rollers in the sense of this document.
  • Other elements of the printing units such as doctoring chambers or roller blocks for adjusting the cylinder and roller 40, 21, 37 are in FIG. 11 not shown.
  • the impression cylinder 40 is equipped with a transparent body 5 and a camera 8.
  • the transparent body 5 forms virtually a window in the lateral surface of the impression cylinder 40 (the impression cylinder is thus partially transparent).
  • the camera 8 is rotated by the impression cylinder and in this way remains during the rotation of the impression cylinder 40 in a position in which it 8 diffuse radiation 13, which penetrates from the body 5 record.
  • the printing plate cylinders 21 are re-set using the measuring device 47 of the impression cylinder 40 (initial setting of the relative position between these two printing cylinder cylinders 40, 21) and the impression cylinder 40 transports stock 39 during this process, the production of waste paper is unlikely to occur be avoided.
  • the measuring device 47 during a rotation of the impression cylinder data to the touch of the impression cylinder 40 with multiple or even all printing plate cylinders 21 wins.
  • the relative positions can be optimized much faster than with positioning, the optimization of the relative positions at the beginning of printing Make inking unit 36, 38 for inking unit.
  • Another advantage of the just described method is that it can do without second values in the sense of this document. Furthermore, a continuous dynamic monitoring of the contact surface 9 during the printing operation in the manner described appears particularly advantageous.
  • FIG. 14 shows a collection of measured values of the measuring roller 49, which results in a period T, while the measuring roller 49 is turned against a cliché roller 21.
  • the cliché 45 is just starting to unroll on the measuring roller.
  • the contact area that is, the total area in which contact between the measuring roller and the cliché is possible, is - for illustrative reasons - outlined by the rectangles 45 ', 45 "and 45"'.
  • the alternative listed in the last preceding indent can be implemented particularly well with the disclosed in this document optical methods.
  • the course of the camera 8 recorded light intensity as a function of the second values such as roll adjustment or pressure in the nip (at which the sensors 46 provide meaningful values) are recorded.
  • the light intensity profile in the entire measuring range for the first measured values and / or the light intensity profile in a possible contact region 19 and / or the light intensity profile in partial regions 51 can be used to find the optimized relative position.

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

Claims (10)

  1. Procédé d'optimisation de la position relative d'au moins deux cylindres d'impression (21, 37, 40), dans lequel la position relative des au moins deux cylindres d'impression est réglée en fonction de valeurs de mesure,
    dans lequel les valeurs de mesure comprennent des premières valeurs relatives à la grandeur de la surface (9) avec laquelle au moins l'un des cylindres d'impression vient au contact d'un autre corps (5, 25, 40),
    et dans lequel les valeurs de mesure comprennent des secondes valeurs relatives à au moins une seconde grandeur physique,
    caractérisé en ce que les premières valeurs comprennent pour leur part des valeurs de mesure qui sont obtenues sur la base de l'enregistrement d'un rayonnement électromagnétique (6, 13),
    dans lequel le rayonnement électromagnétique (6, 13) est réémis par une plaque d'impression (1, 45), une surface de transfert d'encre d'un cylindre d'impression (21, 37, 40) ou un corps qui est en contact (3, 39) avec la plaque d'impression ou la surface de transfert d'encre d'un cylindre (21, 37, 40) participant au processus d'impression, avant que l'enregistrement du rayonnement soit effectué.
  2. Procédé selon la revendication 1,
    caractérisé en ce que les secondes valeurs comprennent la pression d'appui entre les cylindres d'impression (21, 37, 40) et/ou la position relative des paliers de cylindres d'impression.
  3. Procédé selon l'une quelconque des revendications précédentes,
    caractérisé en ce que les premières valeurs comprennent pour leur part des valeurs de pression qui définissent la pression s'établissant lors de la mise en contact d'au moins un cylindre d'impression (21, 37, 40) avec l'au moins un autre corps (5, 25, 40), en unités de surface de la zone de contact possible (10) entre l'au moins un cylindre d'impression (21, 37, 40) et l'au moins un autre corps (5, 25, 40).
  4. Procédé selon l'une quelconque des revendications précédentes,
    caractérisé en ce qu'on enregistre un rayonnement électromagnétique (6, 13) qui est préalablement extrait d'un guide de rayonnement (5, 25) par réflexion totale frustrée.
  5. Procédé selon l'une quelconque des revendications précédentes,
    caractérisé en ce qu'une position relative optimisée des au moins deux cylindres d'impression (21, 37, 40) est adoptée lorsque les premières valeurs sont éloignées d'une valeur nominale d'un point de saturation lors de l'application de l'au moins un cylindre d'impression (21, 37, 40) contre ledit autre corps (5, 25, 40).
  6. Dispositif d'optimisation de la position relative d'au moins deux cylindres d'impression (21, 37, 40) au moyen desquels une position relative optimisée des au moins deux cylindres d'impression. (21, 37, 40) peut être déterminée sur la base de valeurs de mesure,
    comprenant un dispositif de mesure (47, 48) au moyen duquel il est possible de mesurer des valeurs de mesure qui comprennent des premières valeurs relatives à la grandeur de la surface avec laquelle l'au moins un des cylindres d'impression (21, 37, 40) vient au contact d'un autre corps (5, 25, 40),
    et des secondes valeurs relatives à au moins une seconde grandeur physique,
    caractérisé en ce que le dispositif de mesure comprend des capteurs (8) destinés à enregistrer un rayonnement électromagnétique (6, 13), dans lequel le dispositif de mesure comporte des sources (4) de rayonnement électromagnétique (6, 13), et
    en ce que le rayonnement électromagnétique (6, 13) pouvant être émis par les sources (4) de rayonnement électromagnétique peut être réémis par une plaque d'impression (1, 45), une surface de transfert d'encre d'un cylindre d'impression (21, 37, 40) ou un corps qui est en contact (3, 39) avec la plaque d'impression ou la surface de transfert d'encre d'un cylindre (21, 37, 40) participant au processus d'impression et peut être enregistré par des capteurs (8).
  7. Dispositif selon la revendication précédente,
    caractérisé en ce que le dispositif de mesure peut être monté dans ou sur l'au moins un cylindre d'impression (21, 37, 40) et/ou dans ou sur ledit autre corps (5, 25).
  8. Dispositif selon l'une des deux revendications précédentes,
    caractérisé en ce que le dispositif de mesure comprend une unité de mesure de pression au moyen de laquelle il est possible de mesurer la distribution de pression qui se produit dans au moins une partie de la surface de contact entre le cylindre d'impression et l'autre corps.
  9. Dispositif selon l'une quelconque des revendications précédentes,
    caractérisé en ce que le dispositif de mesure comprend l'autre corps et en ce que l'autre corps (5, 25, 40) présente des régions qui sont transparentes audit rayonnement électromagnétique (6, 13).
  10. Dispositif selon l'une des deux revendications précédentes,
    caractérisé en ce que les sources (4) de rayonnement électromagnétique sont disposées de telle manière par rapport aux régions (5, 25), qui sont transparentes audit rayonnement électromagnétique (6, 13), que lesdites régions jouent le rôle de guides de rayonnement (5, 25).
EP11700822.7A 2010-01-14 2011-01-10 Procédé et dispositif destinés à optimiser la position relative d'au moins deux cylindres d'impression Active EP2523809B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010000907.5A DE102010000907B4 (de) 2010-01-14 2010-01-14 Verfahren und Vorrichtung zum Optimieren der Relativposition zumindest zweier Druckwerkszylinder
PCT/EP2011/050214 WO2011086044A1 (fr) 2010-01-14 2011-01-10 Procédé et dispositif destinés à optimiser la position relative d'au moins deux cylindres d'impression

Publications (2)

Publication Number Publication Date
EP2523809A1 EP2523809A1 (fr) 2012-11-21
EP2523809B1 true EP2523809B1 (fr) 2016-08-10

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EP11700822.7A Active EP2523809B1 (fr) 2010-01-14 2011-01-10 Procédé et dispositif destinés à optimiser la position relative d'au moins deux cylindres d'impression

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Country Link
EP (1) EP2523809B1 (fr)
DE (1) DE102010000907B4 (fr)
ES (1) ES2601844T3 (fr)
WO (1) WO2011086044A1 (fr)

Families Citing this family (5)

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Publication number Priority date Publication date Assignee Title
DE102011114211A1 (de) 2011-09-23 2013-03-28 Giesecke & Devrient Gmbh Wertdokumentsubstrat, Folienverbund, Verfahren zum Herstellen derselben und Wertdokument
DE102011086047A1 (de) * 2011-11-09 2013-05-16 Windmöller & Hölscher Kg Verfahren zum Einstellen der Abstände zwischen Zylindern eines Farbwerkes und Druckmaschine
DE102013010763B4 (de) * 2013-06-28 2016-01-07 CONPRINTA GmbH & Co. KG Messelement sowie Vorrichtung und Verfahren zur Einstellung oder Kontrolle eines Anstelldruckes
DE102013019585A1 (de) 2013-11-21 2015-05-21 Giesecke & Devrient Gmbh Verfahren zum Herstellen eines Wertdokuments und eines Sicherheitselements, daraus erhältliches Wertdokument und Sicherheitselement und Vorrichtung zur Durchführung des Verfahrens
JP6733777B1 (ja) * 2019-05-13 2020-08-05 東洋製罐株式会社 印刷機及び印刷機の状態監視方法

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DE4427967B4 (de) * 1993-08-24 2004-09-30 Heidelberger Druckmaschinen Ag Verfahren zum Voreinstellen der Pressung zwischen farbführenden Zylindern einer Druckmaschine
EP0867281A1 (fr) * 1997-03-28 1998-09-30 Schiavi S.p.A. Méthode et dispositif pour mesurer et contrÔler la pression d'impression dans une machine d'impression flexographique
DE10145957B4 (de) * 2001-03-27 2014-09-25 Windmöller & Hölscher Kg Vorrichtung und Verfahren zur Einstellung des Druckbildes in einer Flexodruckmaschine
DE10211870B4 (de) * 2001-03-29 2010-07-29 Heidelberger Druckmaschinen Ag Verfahren zur Justierung zweier aneinander anlegbarer Walzen eines Druckwerks
WO2008028516A1 (fr) * 2006-09-05 2008-03-13 Metso Paper, Inc. Procédé et dispositif pour mesure de condition de ligne de contact
ES2339691T5 (es) * 2006-10-23 2014-07-18 Bobst Bielefeld Gmbh Procedimiento de ajuste de un rodillo en una prensa de imprimir giratoria
DE102007022079A1 (de) * 2007-05-11 2008-11-13 Heidelberger Druckmaschinen Ag Verfahren zum automatisierten Justieren einer Rotationskörperpressung in einer Druckmaschine
DE102007045298A1 (de) * 2007-09-21 2009-04-02 Manroland Ag Vorrichtung und Verfahren zur Messung von Spalten in einem Druckwerk einer Druckmaschine
DE102008025287A1 (de) * 2008-05-27 2009-12-03 SID Sächsisches Institut für die Druckindustrie GmbH Institut des Vereins POLYGRAPH Leipzig e.V. Vorrichtung zur Messung von Pressungskenngrößen im Spalt zwischen zylindrischen Körpern

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Publication number Publication date
EP2523809A1 (fr) 2012-11-21
DE102010000907A1 (de) 2011-07-21
WO2011086044A1 (fr) 2011-07-21
ES2601844T3 (es) 2017-02-16
DE102010000907B4 (de) 2015-09-10

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