EP3043995B1 - Procédé de commande de la vitesse de rotation pour un dispositif d'entraînement d'un cylindre porte-cliché - Google Patents

Procédé de commande de la vitesse de rotation pour un dispositif d'entraînement d'un cylindre porte-cliché Download PDF

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Publication number
EP3043995B1
EP3043995B1 EP14736341.0A EP14736341A EP3043995B1 EP 3043995 B1 EP3043995 B1 EP 3043995B1 EP 14736341 A EP14736341 A EP 14736341A EP 3043995 B1 EP3043995 B1 EP 3043995B1
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EP
European Patent Office
Prior art keywords
rotational speed
control
roller
control curve
printing
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.)
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Application number
EP14736341.0A
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German (de)
English (en)
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EP3043995A1 (fr
Inventor
Frank Westhof
Uwe HÖWELMEYER
Frank Gunschera
Wolfgang Knapheide
Mario FRANKENBERG
Wolfgang Sprehe
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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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/004—Electric or hydraulic features of drives
    • B41F13/0045—Electric driving devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/004—Driving means for ink rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F5/00—Rotary letterpress machines
    • B41F5/24—Rotary letterpress machines for flexographic printing

Definitions

  • the present invention relates to a method for the control of the rotational speed for a drive device of a pressure roller with an elastic pressure jacket of a flexographic printing machine and a flexographic printing machine with a control unit for carrying out such a method.
  • a sensory determination of the indentation depth can be dispensed with in a direct manner.
  • the resulting changing speed is determined on the basis of the described crushing effect of the elastic pressure jacket.
  • This simulated freewheel thus serves to determine the effect and thus the relative velocity to be established for the printing medium or rolls to be contacted.
  • an adaptation in the form of a use of the determined or generated control curve can be carried out.
  • addition values are to be understood as distances which are formed between the pressure roller and an adjacent roller.
  • This may be the Beistellwert between pressure roller and anilox roller and / or the Beistellwert between pressure roller and counter-pressure roller.
  • addition value in order to change the pressure force on the printing medium. Is the changed? Beistellwert, changes accordingly, the pressure situation for the elastic pressure jacket.
  • the associated rotational speed is determined in a method according to the invention not only to a single value, but to at least two Beistell tone.
  • the associated rotational speed is determined.
  • at least two points can be specified for the control curve, which can serve by the determination as a basis for the generation of the control curve.
  • the control curve can be generated by any mathematical or metrological methods.
  • complicated algorithms can also generate curved and non-linear curve profiles for the control curve.
  • the method can be used both for a pressure roller with a pushed-on elastic pressure jacket and for a pressure roller with an elastic pressure jacket molded onto it.
  • the effect according to the invention can also be achieved if the pressure roller is substantially completely formed from an elastic material as a pressure jacket.
  • An active drive device is understood to be the switched-on drive device in which torque is actively output from the drive device for generating the rotational speed to the pressure roller.
  • a non-active drive device or a passive drive device of the simulated freewheel is to be understood. Is it in the drive device z.
  • the drive device is also in the passive state continues to rotate, so that the rotational speed, which sets here in the simulated freewheel, can be detected by the same sensor, as is the case with the control of the drive device.
  • control curve can be used both as a setpoint curve for a control, and as a setpoint curve for a control. In both cases, the control curve may provide the underlying values for the subsequent control.
  • control curve can also be used to adjust the rotational speed of a counter-pressure roller, an anilox roller or other rollers of the flexographic printing press.
  • a change in the additional values is carried out during printing in the current process, in order, for. B. to achieve a change in the printed image, can be used on the generated control curve.
  • a change in the addition values will lead to a change in the squeeze situation of the pressure jacket.
  • this change in squeeze situation is taken into account in the use of the control curve in the control of the rotation speed of the pressure roller. Accordingly, the varying squeezing effect is at least partially offset by the change in control based on the pressure roller control curve.
  • a method according to the invention can be further developed in such a way that the control curve is generated at least in sections as a linear course between the values determined relative to the addition values. It is a particularly simple and inexpensive and fast generation of the control curve. The two specific values in a diagram are simply connected linearly with a straight line. A particularly simple mathematical algorithm allows in this way a particularly cost-effective design of a corresponding control unit. Also, such a control curve as the basis for a subsequent control in the form of a control and / or a control a particularly simple control basis.
  • Another advantage can be achieved if, in a development of the method according to the invention, this is used for a register-free printing.
  • a register-free pressure is a pressure to understand, which in particular has only a single color. Thus, no register retention, so no clean overlap of individual color sections to note.
  • the register freedom means that a change in the printing speed can also be accepted by the control according to the invention of the rotational speed of the printing roller.
  • At least one further rotational speed of the pressure roller in free-running without an active drive device is determined at a further additional value.
  • a third rotation speed or even a plurality of rotation speeds is determined at a plurality of addition values.
  • the curve may be generated from a plurality of discrete values in the form of stepwise training. In all these cases, the increase of the data points, ie the further number of further rotation speeds for other addition values, produces a higher accuracy in the generation of the control curve.
  • the determination steps are carried out continuously or substantially continuously with a continuous or substantially continuous change of the addition value.
  • a substantially continuous curve is recorded and generated as a control curve.
  • the pressure roller is fed to the corresponding contacting counter-roller or the pressure medium and thus changed the Beistellwert.
  • the self-adjusting rotational speed is determined in the simulated freewheel.
  • the written curve is the generated control curve. This can be, so to speak, a first calibration process, in which the pressure roller is moved over the entire adjustment range of the additional value.
  • Such increased accuracy entails a corresponding more accurate fit when used for the control function.
  • the control curve for controlling the rotational speed of an anilox roller is used in a development of the method according to the invention.
  • This additional use situation for the control curve brings about a further improvement with regard to the compensation of the described crushing effect.
  • the anilox roller preferably rotates at the same or essentially the same rotational speed as the pressure roller.
  • a control of other rotational speeds, such. B. rotational speed of the platen roller, based on the control curve conceivable.
  • one and the same generated control curve which is specific to the elastic pressure jacket, can be used to control several different rotational speeds of different components.
  • a further advantage can be achieved if, in a further development of the method according to the invention, a constructive undersize of the diameter of the pressure roller is taken into account in the control of the rotational speed of the pressure roller.
  • a constructive undersize of the diameter of the pressure roller is taken into account in the control of the rotational speed of the pressure roller.
  • the operator of a printing press can already consider the crushing effect when ordering the printing roller.
  • a constructive undersize so a reduction in the diameter of the pressure roller, a change in the rotational speed of the pressure roller, ie in particular an acceleration of the pressure roller by the pressure effect, compensated.
  • this constructive undersize which is based on the order of the customer or the operator of the printing press, already taken into account.
  • the generated control curve is stored with respect to the elastic pressure jacket used and / or with respect to the pressure roller.
  • the storage takes place z. B. in a database relative to the elastic pressure jacket.
  • a library can be generated which provides specific control curves generated for different elastic printing jackets.
  • the calibration described, ie the implementation of a method according to the invention, then only has to be carried out with a completely new elastic pressure jacket. If an already used elastic pressure jacket is mounted, then the stored generated control curve can be recalled from the database. This speeds up the use when printing the flexographic printing press when changing between different elastic printing jackets.
  • the generated control curve is compared with a stored control curve.
  • the comparison with control curves from a database a standard deviation of differently generated control curves can be made to a specific elastic pressure jacket.
  • the standard deviation serves to improve the subsequent use for controlling the rotation speed of the pressure roller.
  • monitoring of the change in the specific control curve generated may give an indication of a change or wear of the elastic pressure jacket.
  • an early warning functionality can be provided by this comparison with a stored generated control curve.
  • a method according to the invention can be further developed such that the control curve is used in comparison to the rotational speed of at least one further roller, in particular an anilox roller and / or a counterpressure roller.
  • at least one further roller in particular an anilox roller and / or a counterpressure roller.
  • a flexographic printing machine comprising a pressure roller with an elastic pressure jacket and a control unit for controlling the rotational speed of the pressure roller.
  • a flexographic printing machine according to the invention is characterized in that the control unit is designed for carrying out a method according to the invention. Accordingly, a flexographic printing machine according to the invention brings the same advantages as have been explained in detail with reference to a method according to the invention.
  • FIG. 1 schematically an embodiment of a flexographic printing machine 100 according to the invention is shown.
  • This flexographic printing machine 100 has a counterpressure roller 50, an anilox roller 40 and a pressure roller 10.
  • an elastic pressure jacket 12 is arranged, which z. B. may be formed as a pressure sleeve.
  • a drive device 20, for. B. in the form of an electric motor which serves to drive the pressure roller 10.
  • a control unit 60 which is coupled to control the rotational speed of the pressure roller 10 via a data link to the drive device 20. Also in Fig. 1 to recognize the course of the pressure medium 200th
  • Fig. 1 schematically the flexographic printing machine 100 is shown with an inking unit of an anilox roller 40 and a pressure roller 10. In this embodiment, it is a register-free printing with a single color.
  • inking units are providable, with an anilox roller 40 and a pressure roller 10 can be provided for each inking unit.
  • Fig. 2 the squish situation is shown.
  • a squeezing situation for the pressure jacket 12 forms between the pressure roller 10 and the counterpressure roller 50.
  • the provision is made in Fig. 2 from top to bottom.
  • the pressure roller 10 is thus fed to the platen roller 50 and reduces the intermediate pressure gap.
  • a pinch of the elastic pressure jacket 12 as shown schematically in FIG Fig. 2 is shown. This pinching leads to a variation of the rotational speed of the pressure roller 10.
  • Fig. 3 a particularly simple and inexpensive design of the generated control curve 30 is shown.
  • the associated rotational speeds V1 and V2 form dots in this diagram, which in this embodiment have been connected along a straight line.
  • a linear relationship between rotational speed and Beistellwert was used for the generation of the control curve 30.
  • the corresponding generation of the control curve could accordingly be achieved with a simple and inexpensive generation algorithm.
  • an adaptation or control of the rotational speed of the pressure roller 10 via an actively acting drive device 20 now takes place.
  • a further variant of the control curve 30 is shown.
  • each associated additional rotational speed Vx were determined.
  • the progressions between the individual parameter values in the diagram according to Fig. 4 are also back on a linear basis.
  • different inclined planes are formed between the individual data values, as is the control curve 30 in accordance with FIG Fig. 4 shows.
  • the effort for the determination of the values is greater, but a higher accuracy in the generation of the control curve 30 is achieved.
  • a step function can be specified for additional values or data values in the diagram of the rotational speed via the additional value.
  • a completely free control curve 30 can be generated in this way by recording this correlation. This is in Fig. 6 shown. Although the calibration effort is highest here, an ideal or optimized accuracy in the generation of the control curve 30 is achieved.

Landscapes

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

Claims (11)

  1. Procédé de contrôle de la vitesse de rotation pour un dispositif d'entraînement (20) d'un cylindre porte-cliché (10) avec un manchon porte-cliché (12) élastique d'une machine d'impression flexographique (100), caractérisé en ce que le procédé présente les étapes suivantes :
    - définition d'une première vitesse de rotation (V1) du cylindre porte-cliché (10) en roue libre sans activation du dispositif d'entraînement (20) pour une première valeur de positionnement (B1),
    - définition d'une deuxième vitesse de rotation (V2) du cylindre porte-cliché (10) en roue libre sans activation du dispositif d'entraînement (20) pour une deuxième valeur de positionnement (P2),
    - production d'une courbe de contrôle (30) de la vitesse de rotation rapportée à la valeur de positionnement sur la base des étapes de définition,
    - utilisation de la courbe de contrôle (30) pour le contrôle de la vitesse de rotation du cylindre porte-cliché (10) avec activation du dispositif d'entraînement (20).
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    la courbe de contrôle (30) est produite au moins par tronçons en tant que tracé linéaire entre les valeurs définies pour les valeurs de positionnement.
  3. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que
    ce procédé est mis en oeuvre pour une impression sans registre.
  4. Procédé selon l'une des revendications précédentes,
    caractérisé en ce
    qu'au moins une autre vitesse de rotation (Vx) du cylindre porte-cliché (10) est définie en roue libre sans activation du dispositif d'entraînement (20) pour une autre valeur de positionnement (Bx).
  5. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que
    les étapes de définition sont effectuées de façon continue ou essentiellement de façon continue pour une variation continue ou essentiellement continue de la valeur de positionnement.
  6. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que
    la courbe de contrôle (30) est utilisée également pour le contrôle de la vitesse de rotation d'un rouleau tramé (40).
  7. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que,
    lors du contrôle de la vitesse de rotation du cylindre porte-cliché (10), une sous-cote, liée à la construction, du diamètre (D) du cylindre porte-cliché (10) est prise en compte.
  8. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que
    la courbe de contrôle (30) produite est enregistrée en référence au manchon porte-cliché (12) élastique utilisé ou en référence au cylindre porte-cliché (10).
  9. Procédé selon la revendication 8,
    caractérisé en ce que
    la courbe de contrôle (30) produite est comparée à une courbe de contrôle enregistrée.
  10. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que,
    la courbe de contrôle (30) est utilisée en comparaison avec la vitesse de rotation d'au moins un autre cylindre, en particulier d'un rouleau tramé (40) et/ou d'un contre-cylindre porte-cliché (50).
  11. Machine d'impression flexographique (100), présentant un cylindre porte-cliché (10) avec un manchon porte-cliché (12) élastique et une unité de contrôle (60) pour le contrôle de la vitesse de rotation du cylindre porte-cliché (10),
    caractérisée en ce que
    l'unité de contrôle (60) est constituée pour la réalisation d'un procédé ayant les caractéristiques d'une des revendications 1 à 10.
EP14736341.0A 2013-09-09 2014-06-30 Procédé de commande de la vitesse de rotation pour un dispositif d'entraînement d'un cylindre porte-cliché Active EP3043995B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013109851.7A DE102013109851A1 (de) 2013-09-09 2013-09-09 Verfahren für die Kontrolle der Rotationsgeschwindigkeit für eine Antriebsvorrichtung einer Druckwalze
PCT/EP2014/063861 WO2015032518A1 (fr) 2013-09-09 2014-06-30 Procédé de commande de la vitesse de rotation pour un dispositif d'entraînement d'un cylindre porte-cliché

Publications (2)

Publication Number Publication Date
EP3043995A1 EP3043995A1 (fr) 2016-07-20
EP3043995B1 true EP3043995B1 (fr) 2017-11-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP14736341.0A Active EP3043995B1 (fr) 2013-09-09 2014-06-30 Procédé de commande de la vitesse de rotation pour un dispositif d'entraînement d'un cylindre porte-cliché

Country Status (5)

Country Link
US (1) US10391760B2 (fr)
EP (1) EP3043995B1 (fr)
DE (1) DE102013109851A1 (fr)
ES (1) ES2651453T3 (fr)
WO (1) WO2015032518A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018036619A1 (fr) * 2016-08-23 2018-03-01 B&R Industrial Automation GmbH Procédé pour régler l'entraînement d'une machine

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2714632B1 (fr) * 1994-01-03 1996-03-15 Cuir Ets Procédé et installation pour l'impression feuille à feuille.
DE19519141A1 (de) * 1995-05-30 1996-12-05 Fischer & Krecke Gmbh & Co Flexodruckmaschine mit variabler Drucklänge
JP3423627B2 (ja) * 1998-11-11 2003-07-07 東芝機械株式会社 輪転印刷機
EP1604820B1 (fr) * 2003-03-20 2008-05-07 Comexi, SA Procede d'enregistrement de differentes couleurs en flexographie et imprimante flexographique a dispositif permettant la mise en oeuvre dudit procede
JP5342781B2 (ja) * 2008-01-07 2013-11-13 三菱重工印刷紙工機械株式会社 段ボールシートの印刷装置及び段ボールシート用製函機
DE102010015628B4 (de) 2009-04-20 2017-11-23 Lenze Automation Gmbh Verfahren zur Drehzahlsteuerung von Walzen in einer Druckmaschine
US8833927B2 (en) * 2012-06-13 2014-09-16 Xerox Corporation Printer having skewed transfix roller to reduce torque disturbances
JP5860840B2 (ja) * 2013-06-13 2016-02-16 株式会社沖データ 定着装置及び画像形成装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
ES2651453T3 (es) 2018-01-26
DE102013109851A1 (de) 2015-03-12
WO2015032518A1 (fr) 2015-03-12
DE102013109851A8 (de) 2015-05-13
EP3043995A1 (fr) 2016-07-20
US10391760B2 (en) 2019-08-27
US20160288489A1 (en) 2016-10-06

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