EP1759844B2 - Procédé pour corriger l'impression - Google Patents

Procédé pour corriger l'impression Download PDF

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Publication number
EP1759844B2
EP1759844B2 EP06013562.1A EP06013562A EP1759844B2 EP 1759844 B2 EP1759844 B2 EP 1759844B2 EP 06013562 A EP06013562 A EP 06013562A EP 1759844 B2 EP1759844 B2 EP 1759844B2
Authority
EP
European Patent Office
Prior art keywords
printing
correction
marks
printed
print
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.)
Not-in-force
Application number
EP06013562.1A
Other languages
German (de)
English (en)
Other versions
EP1759844A3 (fr
EP1759844A2 (fr
EP1759844B1 (fr
Inventor
Stephan Dr. Schultze
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.)
Bosch Rexroth AG
Original Assignee
Bosch Rexroth 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
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Application filed by Bosch Rexroth AG filed Critical Bosch Rexroth AG
Publication of EP1759844A2 publication Critical patent/EP1759844A2/fr
Publication of EP1759844A3 publication Critical patent/EP1759844A3/fr
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Classifications

    • 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
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/02—Conveying or guiding webs through presses or machines
    • B41F13/025—Registering devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0036—Devices for scanning or checking the printed matter for quality control
    • 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 printing correction with a register control device for a multi-color printing machine with individual printing units according to the preamble of the independent claims 1 and 7.
  • the application of the individual color separations takes place in successive printing units.
  • the printing material is provided as a roll material and passed endlessly through the printing unit. Decisive for the achieved print quality is that the print images of the individual colors are exactly on top of each other.
  • the superposition of the printed images is referred to as a register.
  • register marks or generally printed marks are printed in addition to the actual printed image of each printing group. Using these marks, an offset between the individual print images can be recorded online by means of an optical measuring system. As an alternative to the stamping of marks, these errors can be determined in the printed image on the basis of a print image acquisition with image evaluation.
  • this measuring system is generally part of a control system known as register control.
  • register control intervenes via suitable actuators in the printing process and compensates detected by the optical measuring system register deviations.
  • the actuators can change the web length of the printing material between successive printing units so that the printed images of successive printing units are superimposed.
  • the cause of deviations between the individual prints are, in addition to the relative position of the printing units, changes in the geometry of the printing material. These geometry changes are caused, for example, by the influence of moisture and by drying steps arranged between the printing units. This is made even more difficult if the printing material is at least partially stretchable.
  • the web tension is kept largely the same, which allows a good print quality without significant corrections.
  • the control parameters of the register control are adapted to this operating state.
  • the web tension changes with a negative influence on register accuracy. This can usually not be sufficiently compensated by the control system, resulting in this phase of operation to appropriate committee. Even after the acceleration phase, the control system requires a certain running time to get back to the appropriate manipulated variables. This can also cause rejects.
  • the DE 40 37 728 C1 is a device for register control for multi-color web-fed rotary printing presses according to the web / web method described with a controller having a central unit for detecting and storing all control parameters and the control behavior, with a scanner for detecting web register marks and with actuators for controlling the longitudinal register.
  • the apparatus comprises a monitoring unit which has an acceleration detection device which determines a speed change of the printing press on the printing cylinders that differs from a stable path speed and which has a shutdown device which is in signal communication with the acceleration detection device and which regulates the occurrence of a signal representing this speed change as long as intervenes until again a constant operating speed is reached.
  • DE 10 246 072 A1 describes a method for printing length correction wherein multiple registration marks per product and printing process are printed.
  • WO 2004/096546 A1 describes a method of printing correction based on a comparison between the data obtained from the print image detection and comparison image data.
  • stretching of the tool in the material flow direction causes stretching. This is e.g. in the case of flexographic printing clichés, which are rubbery flexible and thus stretchable.
  • the modulus of elasticity depends on the cliché thickness, which varies depending on the pattern to be printed. At a constant clamping force, this results in a cliché-dependent and thereby printing pattern-dependent differential elongation of the plate in the printing direction on the printing cylinder. The same condition occurs when the machining tools are not sufficiently accurate to manufacture or subject to severe manufacturing variations within the format. This complicates the exact positioning of the print images to each other.
  • the substrate can be divided into several areas to be evaluated. These may be, for example, several areas of the cliché in which the cliché prints, i. E. in contact with the printing material.
  • a variant of the method provides that the areas to be evaluated are arranged within a printing area and / or outside the printing area. This allows a particularly flexible adaptation to the print templates.
  • the print marks are scanned automatically.
  • an automatic register control can be realized, in which several areas per format can be corrected.
  • the entire print area can serve as a correction area instead of a fixed number of print marks, so that the unrolling of the print tool can be predistorted in accordance with the processing errors of the print tool Druckklischees or according to the Aufspannce of the cliché, that overall results in an optimal pressure.
  • a variant of the method provides that the respective printing unit, for which the respective print marks or the print image have been evaluated, is adapted in its positioning for correction. This allows for the next printing process optimal alignment of the printing unit.
  • the printing units downstream of the respective printing unit for which the print marks have been evaluated are adjusted in terms of their positioning in a material flow direction. This does not optimize the absolute pressure. It is advantageous, however, that the different printing stations are corrected to each other can, which is of particular interest in multi-color printing, where, for example, the four primary colors cyan, magenta, yellow and black to each other must be adjusted very precisely.
  • An alternative variant provides that, for correction, the evaluation device for detecting the print marks is connected directly to a correcting drive designed as an actuator. As a result, a particularly fast correction is possible.
  • the correction is carried out within specifiable correction areas on the printing substrate, this results in the advantage that, for example, the correction can be carried out selectively outside the printing area. A "smearing" of the pressure is thus avoided. Likewise, a shift of the correction ranges in pressure ranges is possible in which a slight correction only slightly disturbs and thus has only a minimal effect on the print result.
  • a preferred application of the method provides that the method is used in paper printing, in card printing, corrugated printing, plastic or metal foil printing, in wood printing, in the printing of materials or metals with the use of flexible and / or stretchable printing plates.
  • the method is used in paper printing, in card printing, corrugated printing, plastic or metal foil printing, in wood printing, in the printing of materials or metals with the use of flexible and / or stretchable printing plates.
  • flexographic printing plates are used as printing plates, which is the case in particular for direct printing of corrugated cardboard
  • the correction method can effectively also be used to carry out complex corrections of the distortions that can occur, in particular, through the use of the flexographic printing plates.
  • a further preferred application of the method provides that in the case of several printing units which can be controlled with respect to each other, first a first printing is performed without correction and all determined correction values are checked for possible reductions in printing length and modified in this way together with the printing of the first printing unit in that compression shortening is excluded.
  • This is particularly advantageous in terms of printing on paper or corrugated board, where in certain cases can lead to critical print length shortening, which can then have particularly serious effects on the printed image.
  • this method variant no absolute printing accuracy is achieved. However, the print stations remain error-free to each other, without critical Druckensteinnverkürzache can occur.
  • a prior art print correction assumes that errors of the print lengths are corrected in a print-free area in which a correction movement is performed.
  • FIG. 1 shows a schematic representation of a movement profile without and with pressure length correction. Without print length correction results in a motion profile without correction 60th This is through a, over the entire range linear course marked. The speed of a printing material 10 is constant.
  • a motion profile with correction 70 typically results, which has a speed that is initially constant in a printing area 30, and slightly higher than the motion profile without correction 60.
  • a correction area 40 which adjoins the printing area 30, the printing substrate 10 is first decelerated and then accelerated again until the necessary previously determined printing length correction has been achieved.
  • a corresponding velocity profile with correction 80 is also shown in this diagram.
  • additional printed marks are printed per product and printing process and these are compared for register control with reference points or reference areas. This can be done for example by comparison with a Leitachsposition.
  • the printing material 10 is divided into several areas to be evaluated. These may be, for example, several areas of the cliché in which the cliché prints, i. E. is in contact with the printing material 10. In addition, there are, for example, areas in which the cliché is not in contact with the printing material 10. Suitably one corrects within these ranges, since thereby no "smearing" of the pressure occurs. This results in no impact on the transport process of the printing material 10th
  • FIG. 2 shows by way of example in schematic representation a printing material 10, which has a first correction area 41 and a second correction area 42.
  • a first print mark 51 is arranged in the direction of a material flow direction 20 in front of the first correction region 41.
  • a second print mark 52 is arranged between the first correction area 41 and the second correction area 42 in the example shown.
  • FIG. 3 is shown in schematic representation another example.
  • the printing substrate 10 has a first correction area 41, which is adjoined by a second correction area 42, and subsequently by a third correction area 43 and subsequently by a fourth correction area 44.
  • a first print mark 51 At the beginning of the first correction area 41 is located on the substrate 10, a first print mark 51.
  • a second print mark 52 is directly at the beginning of the second correction area 42, a third print mark 53 right at the beginning of the third correction area 43 and a fourth print mark 54 right at the beginning of the fourth correction area.
  • Another variant of the method provides for a correction of the subsequent printing stations. Instead of correcting the printing station whose print image has been evaluated, all subsequent printing stations can also be corrected according to their position. This option can be further enhanced by also correcting the print station that prints the print image to be evaluated, which, however, only affects the next print of the next product.
  • a particularly rapid correction can be made possible if the evaluation device, for example a brand reader or a camera system, directly is connected to the correcting drive, the actuator.
  • the evaluation device for example a brand reader or a camera system
  • the actuator directly is connected to the correcting drive, the actuator.
  • this option is not possible with the options of correcting the subsequent printing stations or in combination with the correction of printing stations and subsequent printing stations.
  • the described method and its variants make it possible, in particular, to compensate for distortions such as may occur, for example, when printing on paper or paperboard, corrugated cardboard, plastic or metal foils, wood, materials or metals with flexographic printing plates.
  • the manufacturing tolerances of the printing plates which may vary depending on the cliché height, and on the other hand possible Aufspannmay be corrected as a result of a partially different elongation of this cliché.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Quality & Reliability (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Printing Methods (AREA)

Claims (17)

  1. Procédé pour corriger la longueur d'impression avec un dispositif de régulation d'alignement pour une imprimante couleur, comprenant des dispositifs d'impression individuels, dans lequel des marques d'impression sont appliquées sur une matière d'impression (10), lesquelles sont détectées au moyen de capteurs, une longueur d'impression étant corrigée en déplaçant la matière d'impression (10) par rapport à un dispositif d'impression, un dispositif d'impression imprimant au moins une première marque d'impression (51) et une deuxième marque d'impression (52) dans la direction du flux de matière (20) pour chaque produit et chaque opération d'impression, et ces marques d'impression étant détectées, caractérisé en ce que les positions des marques d'impression détectées (51, 52) sont comparées avec des points de référence en vue d'effectuer une correction de longueur d'impression, la correction de longueur d'impression étant effectuée dans des plages de correction prédéfinissables (40) sur la matière d'impression (10).
  2. Procédé selon la revendication 1, caractérisé en ce que d'autres marques d'impression (53, 54) sont imprimées par produit et par opération d'impression, et celles-ci sont analysées en vue d'effectuer une correction de longueur d'impression.
  3. Procédé selon l'une quelconque des revendications 1 à 2, caractérisé en ce que les marques d'impression (51, 52, 53, 54) sont balayées automatiquement.
  4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que les marques d'impression (51, 52, 53, 54) sont détectées au moyen de lecteurs de marques.
  5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que pour la correction, le positionnement du dispositif d'impression respectif, qui imprime les au moins une première et deuxième marques d'impression (51, 52, 53, 54), est modifié.
  6. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce que pour la correction, le positionnement des dispositifs d'impression placés, dans la direction du flux de matière (20), après le dispositif d'impression respectif qui imprime les au moins une première et deuxième marques d'impression (51, 52, 53, 54), est modifié.
  7. Procédé pour corriger la longueur d'impression avec un dispositif de régulation d'alignement pour une imprimante couleur, comprenant des dispositifs d'impression individuels, dans lequel une détection d'image d'impression au moins partielle a lieu à l'aide d'une analyse d'image, et une analyse est effectuée dans le dispositif de régulation d'alignement, une longueur d'impression étant corrigée en déplaçant la matière d'impression (10) par rapport à un dispositif d'impression, caractérisé en ce que la correction de la longueur d'impression a lieu sur la base d'une comparaison entre les données obtenues par la détection d'image d'impression et des données d'image comparatives.
  8. Procédé selon la revendication 7, caractérisé en ce que la matière d'impression (10) est divisée en plusieurs régions à analyser.
  9. Procédé selon la revendication 8, caractérisé en ce que les régions à analyser sont disposées à l'intérieur d'une région d'impression (30) et/ou en dehors de la région d'impression (30).
  10. Procédé selon l'une quelconque des revendications 7 à 9, caractérisé en ce que l'image d'impression est balayée automatiquement.
  11. Procédé selon l'une quelconque des revendications 7 à 10, caractérisé en ce que l'image d'impression est détectée au moyen d'une ou plusieurs caméras et d'une analyse d'image montée après celles-ci.
  12. Procédé selon l'une quelconque des revendications 7 à 11, caractérisé en ce que pour la correction, le positionnement du dispositif d'impression respectif pour lequel l'image d'impression a été analysée, est modifié.
  13. Procédé selon l'une quelconque des revendications 7 à 12, caractérisé en ce que pour la correction, le positionnement des dispositifs d'impression placés, dans la direction du flux de matière (20), après le dispositif d'impression respectif pour lequel l'image d'impression a été analysée, est modifié.
  14. Procédé selon l'une quelconque des revendications 1 à 13, caractérisé en ce que la correction de longueur d'impression est effectuée dans des plages de correction prédéfinissables (40) sur la matière d'impression (10).
  15. Procédé selon l'une quelconque des revendications 1 à 14, caractérisé en ce que dans le cas de plusieurs dispositifs d'impression qui peuvent être réglés les uns par rapport aux autres, on effectue d'abord dans un premier dispositif d'impression une première impression sans correction, et toutes les valeurs de correction déterminées sont contrôlées en termes de raccourcissements possibles de la longueur d'impression, et sont modifiées avec l'impression du premier dispositif d'impression de telle sorte que des raccourcissements de la longueur d'impression soient exclus.
  16. Utilisation du procédé de correction de la longueur d'impression selon au moins l'une quelconque des revendications 1 à 15, caractérisée en ce que le procédé est utilisé dans l'impression de papier, de carton, de carton ondulé, de plastique ou de film métallique, dans l'impression sur bois, l'impression de matières ou de métaux en utilisant des clichés d'impression flexibles et/ou extensibles.
  17. Utilisation du procédé de correction de la longueur d'impression selon la revendication 16, caractérisée en ce que l'on utilise comme clichés d'impression des clichés d'impression flexographique.
EP06013562.1A 2005-09-02 2006-06-30 Procédé pour corriger l'impression Not-in-force EP1759844B2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005041651A DE102005041651A1 (de) 2005-09-02 2005-09-02 Verfahren zur Druckkorrektur

Publications (4)

Publication Number Publication Date
EP1759844A2 EP1759844A2 (fr) 2007-03-07
EP1759844A3 EP1759844A3 (fr) 2011-03-23
EP1759844B1 EP1759844B1 (fr) 2012-06-13
EP1759844B2 true EP1759844B2 (fr) 2019-04-24

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ID=37775594

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06013562.1A Not-in-force EP1759844B2 (fr) 2005-09-02 2006-06-30 Procédé pour corriger l'impression

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US (1) US20070051265A1 (fr)
EP (1) EP1759844B2 (fr)
JP (1) JP2007069607A (fr)
DE (1) DE102005041651A1 (fr)

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DE102009013169B4 (de) 2008-03-28 2021-12-09 Heidelberger Druckmaschinen Ag Geometriefehlerkorrektur unter Bewahrung festgelegter Informationen
EP2392459B1 (fr) 2010-06-02 2015-09-02 Müller Martini Holding AG Procédé et dispositif de réglage du registre d'une presse d' impression
JP5713587B2 (ja) * 2010-06-29 2015-05-07 三菱重工印刷紙工機械株式会社 製函機，検査装置，及び製函機の印刷見当制御方法
EP2619012B1 (fr) * 2010-09-21 2014-08-20 Bobst Mex Sa Procede et agencement de mise en registre des couleurs pour une machine d'impression
DE102012109949A1 (de) * 2012-10-18 2014-05-22 Baumer Hhs Gmbh Verfahren und Vorrichtung zur Passermessung und/oder Passerkorrektur
FR3024075B1 (fr) * 2014-07-25 2019-06-07 Illinois Tool Works Inc. Methode de decoration, systeme de controle et machine de decoration
DE102015200148B4 (de) * 2015-01-08 2017-04-13 Koenig & Bauer Ag Verfahren zur Anpassung mindestens einer Länge einer auf mehreren Druckbogen jeweils gleich groß drucktechnisch auszubildenden Fläche

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EP0812682B1 (fr) † 1996-06-11 1999-09-29 MAN Roland Druckmaschinen AG Entraínement pour une machine à imprimer

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Publication number Priority date Publication date Assignee Title
EP0812683B1 (fr) † 1996-06-11 1999-08-18 MAN Roland Druckmaschinen AG Entraínement pour une machine à imprimer
EP0812682B1 (fr) † 1996-06-11 1999-09-29 MAN Roland Druckmaschinen AG Entraínement pour une machine à imprimer

Also Published As

Publication number Publication date
EP1759844A3 (fr) 2011-03-23
US20070051265A1 (en) 2007-03-08
EP1759844A2 (fr) 2007-03-07
DE102005041651A1 (de) 2007-03-22
EP1759844B1 (fr) 2012-06-13
JP2007069607A (ja) 2007-03-22

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