EP2625039B1 - Presse rotative et procédé de contrôle de paramètres du moyen d'impression appliqué sur le matériau à imprimer - Google Patents

Presse rotative et procédé de contrôle de paramètres du moyen d'impression appliqué sur le matériau à imprimer Download PDF

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Publication number
EP2625039B1
EP2625039B1 EP11760766.3A EP11760766A EP2625039B1 EP 2625039 B1 EP2625039 B1 EP 2625039B1 EP 11760766 A EP11760766 A EP 11760766A EP 2625039 B1 EP2625039 B1 EP 2625039B1
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EP
European Patent Office
Prior art keywords
printing
contact
contact element
sensor station
printing press
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
EP11760766.3A
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German (de)
English (en)
Other versions
EP2625039A1 (fr
Inventor
Martin Krümpelmann
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.)
Windmoeller and Hoelscher KG
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Windmoeller and Hoelscher KG
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Publication of EP2625039A1 publication Critical patent/EP2625039A1/fr
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Publication of EP2625039B1 publication Critical patent/EP2625039B1/fr
Not-in-force legal-status Critical Current
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
    • 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
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • 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

Definitions

  • the invention relates to a rotary printing press and to a method for monitoring characteristic values of the pressure medium applied to the printing substrate.
  • Rotary printing presses have means of transport that guide the printing material through the printing press.
  • the web is unrolled from a first roll, slides over guide rolls to a number of inking units in which it is printed, and is wound up on a second roll.
  • Printing material is subjected to printing with printing medium - often paint but also paint and other coating materials -. There is a need to determine the condition of the printing agent on the substrate. Frequently, a sample of the printed printing material is taken and examined. In particular, if the substrate is in sheet form, this work is very impractical and inevitably leads to waste, since substrate must be cut out of the substrate web. Often, the degree of drying or crosslinking of the color is in the focus of interest in these studies, since the substrate is to be stored often after printing and it can come through the post-curing of the substance to unpleasant bonds and the like.
  • Object of the present invention is therefore to achieve complete drying or curing of the printing material.
  • the solution according to the invention is based on the recognition that a sensor station has a first positioning body, which can be brought into contact with the printing material in the area of the applied printing means, and in that the sensors of the sensor station record measured values originating from components of printing means which are in contact with stand the at least one first AnstellIER and / or have been removed from the at least one first Anstell stresses of the substrate.
  • a rotary printing machine of the kind proposed in claim 1 has a positioning body.
  • This AnstellIER can be employed against a surface of the printing material, which is acted upon by the pressure medium. It is important that this adjustment be made with a sensitivity that corresponds to the sensitivity of the printed image.
  • An Anstell redesign can be formed by any type of bodies. However, bodies or devices which have a circumferential surface, such as a belt or belt surface or the circumferential surface of a roller, are advantageous. To protect the printed image, this surface can be brought to the same speed as the printing substrate, if it is running.
  • measured values are taken from these constituents of the pressure medium. Often these measurements will be statements on the amount of constituents of the pressure medium per unit area.
  • the Anstell redesign should therefore be made on the side of the pressure medium film to be examined against the pressure medium film.
  • the solvent is a water or alcohol and has some electrical conductivity due to the dipole nature of its molecules.
  • On the surface of the Anstell emotionss a roller, fine flat tracks can be located.
  • electrical properties of the roll surface change, such as the resistance between interconnects. Such changes in the electrical or electronic properties of the roll surface can be measured.
  • polymer coatings have become known which change their properties when they come into contact with paint components.
  • the web can be dried more strongly by the introduction of temperature and / or air, or it can be freed from solvents to a greater extent.
  • the degree of crosslinking between molecules of the color film is also one of the variables that are influenced in this context.
  • high-energy radiation that can accelerate polymerization is often used.
  • finishing methods apply additional chemicals to the print substrate.
  • the mentioned web finishing stations have a high energy and possibly resource consumption and it is advantageous to investigate characteristic values of the pressure medium film and to regulate the activity of the web finishing stations.
  • the sensor station can have a plurality of first Anstell emotions, which are brought into contact with the web. It is also advantageous if, in addition to at least one first Anstell emotions second Anstell redesign are present. In this case, a transport of pressure medium components takes place via the at least one first AnstellIER at least to the second Anstell redesign. This makes it possible, inter alia, to use different sensors and here also different types of sensors in addition to the measurements.
  • an electrically conductive solvent eg water or alcohol
  • the amount of solvent, which is per unit area on the first Anstell stresses almost alone responsible for the change in the electrical properties of the contact surface.
  • the color-active polymers and the blend contribute almost nothing to the overall conductivity (or reduce the conductivity if they were present in very high concentration).
  • a part of the pressure medium components is transferred to a second Anstellianu.
  • Both Anstellites are here rollers, the second Anstellianu is transparent.
  • the transmission of white light through this roller is measured.
  • the transmission is almost exclusively determined by the color pigments, which were transferred to the second roller after two further color separations (first during printing) and the already used drying and crosslinking process.
  • the color split is determined by the degree of crosslinking and the residual solvent concentration measured on the first roll. Therefore, it can be concluded from the concentration of the color pigments on the second roller on the degree of crosslinking of the ink film.
  • An objective of the above measures may be to achieve a state of equilibrium for the quantity "amount of a color component per unit area of the contact surface of the Anstell stresses" at one or more measuring points for a significant period of time (it will as much color component discharged as supplied, the amount of ink per unit area is in a traceable dependence on the state of the ink film on the substrate).
  • rollers or Anstellharmharmharma that measure the temperature of the web or the pressure medium film.
  • the measurement can be better interpreted (eg by means of a calibration table which represents the measurement sensitivity as a function of the temperature).
  • Fig. 1 shows a sketch of a column machine 1, in which is unwound from a unwinding roll 2 4 web.
  • the web passes through guide rollers to the printing units D1-D4, which are equipped here as gravure printing units with impression rollers P1-P4 and format cylinders F1-F4.
  • the finished printed web 4 is wound on the take-up roll 5.
  • the web 4 passes between the printing units 1 to 4 Brufinishingstationen T1 to T4, which are often configured in gravure printing machines as a pure dryer.
  • Bahnfinishingstation is used as a generic term at least to the terms dryer and fuser.
  • the sensor station 7 In the web running direction z in front of the web finishing station T2 is the sensor station 7. With this, the moisture content of the web can be measured. Knowing the measured values, the activity of the webfing station T2 can be controlled.
  • the sensor station 8 determines the residual moisture or - depending on the solvent in the printing inks - the residual solvent content in the colors. Based on the measured values obtained, the activity of the web finishing station T3 can be controlled since the measurements allow a conclusion as to whether the activity of the web finishing station T3 is appropriate or not.
  • FIG. 2 shows a sketch of a central cylinder printing machine 10, in the printing cylinder D1 to D6 against a central impression cylinder. 6 are employed. Again, the web 4 is unwound from a unwinding roll 2. She will have an in FIG. 2 Guide roller 3, not shown, supplied to the central impression cylinder 6 and pressed there by the pressure roller 9. As a result of the rotation of the central counter-pressure cylinder 6, the web is guided successively through the pressure zones DZ1 to DZ6, which respectively form between the pressure cylinders D1 to D6 and the central impression cylinder 6.
  • a sensor station 7 upstream of a web finishing station 7 can drive a web finishing station 7 and, when used in conjunction with a downstream sensor station, reduce the response time.
  • Another major advantage of such an upstream sensor station 7 but should be that also the activity of the sensor station upstream printing units can be controlled to a certain extent. For example, the result of such measurements can be that color with very high solvent concentration is applied to the substrate.
  • such a control device can better interpret the measured values.
  • FIG. 3 a first simple sensor station 21 is sketched.
  • the first setting roller 11 can be brought into contact with the printing material 4 in the area of the applied printing medium.
  • the guide rollers 3 touch the substrate or the web 4 on the unprinted side.
  • the setting roller 11 contains sensors with which the amount of solvent per unit area can be measured. It should also be mentioned that the printing material web 4 in FIG. 3 passes through a nip between a guide roller 3 and the set roller 11. In this way, a reliable mechanical contact of the printing substrate 4 and the surface 30 of the first Anstellwalze 11 and the Anstell emotions be guaranteed.
  • One of the well-known advantages of electrostatics is that it supports, for example, the color separation in gravure printing.
  • impression rollers and gravure cylinders are brought to different electrical potentials.
  • the ink which initially sits in the recesses of the engraving cylinder, is pulled out of these recesses by the electric field, so that the transfer of ink to the printing substrate is increased.
  • the DE4204871 C2 shows a device that applies this teaching.
  • FIG. 4 Another sensor station 21 is in FIG. 4 shown.
  • a first Anstellwalze 11 again charged with sensors in its surface. With it 11, the amount of conductive solvent can be measured on its surface.
  • another Anstellwalze 12 is employed. It is transparent and equipped with a radiation sensor 13 inside. It measures the intensity of the radiation 15 emitted by the radiation source 14, which falls through the envelope of the second setting roller 12 that is transparent to this radiation.
  • the radiation recorded by the radiation sensor 13 changes significantly, and conclusions can be drawn on the amount of color pigments per unit area of the second set roller 12.
  • FIG. 5 shows first in the transport direction of the pressure medium components y by the Anstellmaschine 11, 12 the same features as FIG. 4 , However, a further Anstellwalze 16 is employed against the second Anstellwalze 12.
  • This roller may also have sensors.
  • this roller may be equipped with capacitive sensors that govern the presence of a dielectric bleed. In this way, it is also possible to measure the quantity of this further component of the pressure medium which is still free in the applied color film.
  • polymers designed to react with the paint ingredients can be used.
  • the presence of the ink sink ensures a permanent removal of the pressure medium components from the front Anstellköpern 11, 12 and 16, which are acted upon with sensors safely. In this way, inter alia, a constant accumulation of color components is avoided on these rollers. If the removal of the color components is well adjusted by the ink sink 23, sets on the provided with measuring means rollers 11, 12 and 16, an amount of certain printing media per unit area, a balance between this amount on the substrate and the amount in the color sink represents. This equilibrium amount remains constant for a sufficient time to be measured.
  • a roller may constantly dispense colorant ingredients to a revolving nonwoven body that is changed from time to time.
  • FIG. 7 a setting station is shown in which the first Anstell redesign is a circulating belt 11.
  • the Umlaufgeschwindigleit the band again corresponds to that of the web 4, so that between these two elements 4, 11 no Reltiv ausifer is present.
  • the band-shaped positioning body 11 passes over deflecting rollers 26 and web guiding rollers 27, which also make it against the printing material 4.
  • sensors 29, for example measure the residual solvent content in the paint film. This can in particular in the in FIG. 7 be measured structure without components of the pressure medium on the Anstell redesign realize 11 pass.
  • the length of the contact between a certain portion of the web 4 and a certain portion of the band-shaped Anstell stresses 11 is crucial in this case for the measurement, longer periods of time are advantageous.
  • the Length depends on the length of the portion of the web-shaped Anstell stressess 11 and the speed of the printed material 4 from. Advantageous here are lengths of over one meter.
  • FIG. 8 shows a sensor station 21, which is equipped with a first Anstellwalze 11, which has a very large diameter.
  • the printing material web 4 wraps around this setting roller in a very large part (wrap angle).
  • wrap angles of over 90 °. Further advantages result at over 180 °, 270 ° and 300 °.
  • the roll shell sensors that measure characteristics of the ink film on the substrate 4.
  • the surfaces of rolls in which electrical properties change can be provided, for example, by photochemical methods.
  • conductor structures can be applied to these surfaces. The resistances or capacitances between these conductors may change as a result of contact with color components.
  • complex conductor patterns are also increasingly applied to substrates by printing methods. In addition to longer known screen printing processes (eg hybrid technology), increasing attention is being given to printing processes in which organic polymers in fine structures are often applied to the substrate with a multiplicity of layers.
  • constant environmental conditions such as a constant temperature are advantageous. These must then be able to be provided in the sensor station 21.
  • an alternative to a constant temperature of the roller and optionally the web is a measurement of the temperature, which can also take place with a first setting body 11. Based on the measured temperature values, measured values can then be calibrated to other characteristic values of the pressure medium film.
  • FIG. 9 will be like in FIG. 8 a first setting roller 11 is shown, which is largely wrapped by web.
  • the web 4 rests on the surface of the setting roller and is transported only by the rotation of the setting roller 11.
  • This speed can advantageously be determined based on the revolutions of one of the rollers involved in the printing process.
  • a speed determination between the last printing zone DZ in the web running direction before the sensor station 7, 8, 21 and the sensor station be beneficial. This can be done again with the aid of a revolving roller or a nip (record the speed of the roller, calculate the web speed via the roller diameter).
  • optical methods are also available in which, for example, the path speed can be deduced from the sequence of register marks.
  • a second Anstellwalze 12 is employed against the surface of the first Anstellwalze 11.
  • This roller is similar in characteristics to the second setting roller 12 in the FIGS. 4 and 5 , instead of this roller, however, a cleaning roller 19 could be useful at this point.
  • FIG. 9 is the second Anstellwalze 12 in operative connection with a color or pressure medium sink 23, which has the same components as the pressure medium sinks 23 in the FIGS. 4 and 5 ,
  • the in FIG. 9 The construction shown again provides the possibility of determining measured values with the two sensor-proven setting rollers 11 and 12. These can be obtained by different methods.
  • the largely looped Anstellwalze 11 in particular offer the electrical and electronic and the chemical measurement method.
  • optical methods are also suitable.
  • the active compound with the color sink ensures a constant removal of color components from the system and prevents the accumulation of the same in the area of the sensors.
  • control units set up for example, by the implementation of suitable software.
  • control unit of the printing machine in question for this purpose.
  • FIG. 10 is the surface of an AnstellMechs outlined. If the Anstell redesign is a roller, then FIG. 10 to be understood as the sketch of a development of the roll surface.
  • the surface 30 is divided into a matrix, wherein the individual surface areas are assigned to sensors 29. How these sensors can be arranged is in the FIGS. 11 and 12 shown by the surface portions 31 and 36.
  • the conductor tracks 32 and 33 can be seen. Their thickened ends indicate that they are in electrical contact with tracks below the surface.
  • the two interconnects 32, 33 are brought to a different electrical potential. If there is a conductive liquid in the area between the interconnects, the resistance between the two interconnects 32, 33 drops. This circumstance can be measured.
  • the resistance also decreases when there is a mechanical contact between the conductor tracks 32, 33 and the pressure medium film, without a final transfer of pressure medium constituents to the at least one first Anstell stresses 11 sets and the paint film, for example, as a result of its residual solvent content, a noteworthy having electrical conductivity.
  • the area between the strip conductors or even entire areas of the surface of the Anstell emotionss be covered with a chemical that reacts color components and this case changes at least one electrical property such as conductivity. This change can then be measured.
  • the resistance between the two electrodes 34 and 35 can be measured in the same way.
  • the in FIG. 12 Also shown is geometry for measuring a capacitance change that occurs in the presence of a dielectric fluid between the electrodes. Often, the tracks and electrodes will be raised from the rest of the surface 30. Again, the change in capacity as described above can be caused solely by the properties of color components. Again, however, is alternatively or additionally the possibility available to provide on the roll surface substances that combine with color components, with a significant change in capacity comes about.
  • composition of the pressure medium in the printing press 1, 10 is to be controlled from different pressure medium constituents and / or the activity of a web finishing station T, T1, T2, longer response times of the variables to be controlled are to be expected anyway.

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

Claims (17)

  1. Imprimante rotative (1, 10) pour l'impression d'un matériau à imprimer (4),
    - disposant de moyens de transport (3) avec lesquels le matériau à imprimer (4) peut être guidé dans une direction de transport (z) à travers l'imprimante (1, 10),
    - disposant d'au moins un dispositif d'encrage (F1 - F6) avec lequel un moyen d'impression peut être appliqué sur le matériau à imprimer (4),
    - et présentant un poste de capteurs (7, 8, 21) qui est monté après l'au moins un dispositif d'encrage (F1 - F6) dans la direction de transport (z) du matériau à imprimer (4) et qui présente des capteurs (13, 29) avec lesquels des valeurs de mesure peuvent être enregistrées,
    caractérisée en ce que
    - le poste de capteurs (7, 8, 21) présente au moins un premier corps d'application (11) qui peut être amené en contact avec le matériau à imprimer (4) dans la région du moyen d'impression appliqué, et
    - les capteurs du poste de capteurs (7, 8, 21) enregistrent des valeurs de mesure qui proviennent de constituants de moyens d'impression qui sont en contact avec l'au moins un premier corps d'application (11) et/ou qui ont été enlevés de l'au moins un premier corps d'application (11) par le matériau à imprimer (4).
  2. Imprimante rotative selon la revendication 1, caractérisée en ce que
    - au moins un poste de finition de produits d'impression (T, T1, T2) est monté après l'au moins un dispositif d'encrage (F1 - F6), dont l'activité peut être commandée par un dispositif de commande,
    - les valeurs de mesure du poste de capteurs (7, 8, 21) peuvent être acheminées au dispositif de commande, et
    - l'unité de commande est prévue pour commander ou réguler l'activité du poste de finition de produits d'impression (T, T1, T2) sur la base des valeurs de mesure.
  3. Imprimante rotative selon l'une quelconque des revendications précédentes, caractérisée en ce que le poste de capteurs (7, 8, 21) présente au moins un deuxième corps d'application (11) qui peut également être amené en contact avec le matériau à imprimer (4).
  4. Imprimante rotative selon l'une quelconque des revendications précédentes, caractérisée en ce que le poste de capteurs (7, 8, 21) présente au moins un deuxième corps d'application (12) qui pour sa part peut être amené en contact avec au moins un premier corps d'application (11).
  5. Imprimante rotative selon l'une quelconque des revendications précédentes, caractérisée en ce que le poste de capteurs (7, 8, 21) présente au moins un puits de moyen d'impression (23) pour enlever le moyen d'impression d'au moins l'un des corps d'application (11, 12, 16) du poste de capteurs (7, 8, 21).
  6. Imprimante rotative selon l'une quelconque des revendications précédentes, caractérisée en ce qu'au moins l'un des corps d'application (11, 12, 16) du poste de capteurs (7, 8, 21) dispose de capteurs (29) dans sa surface de contact, avec lesquels des signaux de mesure peuvent être enregistrés, lesquels dépendent de la concentration en constituants du moyen d'impression sur la surface de contact du corps d'application (11, 12, 16) avec le matériau à imprimer (4).
  7. Imprimante rotative selon la revendication précédente, caractérisée en ce que les capteurs (29) dans la surface de contact de l'au moins un corps d'application (11, 12, 16) sont des capteurs qui modifient leurs propriétés électriques et/ou électroniques au contact avec des constituants du moyen d'impression.
  8. Imprimante rotative selon la revendication précédente, caractérisée en ce que les capteurs (29) présentent des conducteurs exposés ou des pistes semi-conductrices (32, 33, 34, 35).
  9. Imprimante rotative selon l'une quelconque des revendications précédentes, caractérisée en ce qu'au moins l'un des corps d'application (11, 12, 16) du poste de capteurs (7, 8, 21) est un cylindre et en ce que ce cylindre peut se composer d'un manchon et d'un mandrin, le manchon formant la surface périphérique du cylindre et le mandrin étant à l'intérieur du cylindre.
  10. Imprimante rotative selon la revendication 9, caractérisée en ce qu'au moins l'un des cylindres du poste de capteurs (7, 8, 21) peut être régulé en température.
  11. Imprimante rotative selon la revendication 9 ou 10, caractérisée par un système de capteurs (13, 29) qui peut être amené dans une position de travail par rapport à au moins l'un des cylindres du poste de capteurs (7, 8, 21).
  12. Procédé pour contrôler des valeurs caractéristiques d'un moyen d'impression imprimé sur un matériau à imprimer par une imprimante, caractérisé en ce que
    - au moins un premier corps d'application (11, 12, 21) est amené dans la région du moyen d'impression imprimé en contact avec le matériau à imprimer (4), et
    - des mesures sont effectuées au niveau de constituants du moyen d'impression, qui se trouvent en contact avec le corps d'application (11, 12, 21) et/ou qui ont été transportés depuis l'au moins un premier corps d'application (11, 12, 21).
  13. Procédé selon la revendication précédente, caractérisé en ce que le rapport quantitatif des constituants du moyen d'impression dans l'imprimante (1, 10) est régulé sur la base des mesures.
  14. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que des constituants du moyen d'impression sont transportés depuis le premier corps d'application (11) au moins jusqu'à un deuxième corps d'application (12) et éventuellement jusqu'à d'autres corps d'application (21).
  15. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins un corps d'application (11) est appliqué et déposé à intervalles de temps par un matériau à imprimer en mouvement (4) ou un corps d'application (11, 12, 21) monté en amont dans la direction de transport du moyen d'impression (y).
  16. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins un corps d'application (11, 12, 21) est lavé.
  17. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la mesure est effectuée avec au moins deux groupes de capteurs (13, 29), de préférence avec deux procédés de mesure différents.
EP11760766.3A 2010-10-06 2011-09-21 Presse rotative et procédé de contrôle de paramètres du moyen d'impression appliqué sur le matériau à imprimer Not-in-force EP2625039B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010042033 DE102010042033A1 (de) 2010-10-06 2010-10-06 Rotationsdruckmaschine zum Bedrucken eines Bedruckstoffes und Verfahren zum Überwachen von Kennwerten des auf den Bedruckstoff aufgebrachten Druckmittels
PCT/EP2011/066412 WO2012045579A1 (fr) 2010-10-06 2011-09-21 Presse rotative et procédé de contrôle de paramètres du moyen d'impression appliqué sur le matériau à imprimer

Publications (2)

Publication Number Publication Date
EP2625039A1 EP2625039A1 (fr) 2013-08-14
EP2625039B1 true EP2625039B1 (fr) 2015-03-04

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EP11760766.3A Not-in-force EP2625039B1 (fr) 2010-10-06 2011-09-21 Presse rotative et procédé de contrôle de paramètres du moyen d'impression appliqué sur le matériau à imprimer

Country Status (4)

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EP (1) EP2625039B1 (fr)
DE (1) DE102010042033A1 (fr)
ES (1) ES2537985T3 (fr)
WO (1) WO2012045579A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE202013102069U1 (de) * 2013-05-13 2014-08-14 Eltromat Gmbh Farbmesseinrichtung, insbesondere für Druckmaschinen

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ES2537985T3 (es) 2015-06-16
WO2012045579A1 (fr) 2012-04-12
EP2625039A1 (fr) 2013-08-14

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