EP1303404B1 - Procede de regulation de la tension d'une bande de matiere dans une machine d'impression rotative - Google Patents

Procede de regulation de la tension d'une bande de matiere dans une machine d'impression rotative Download PDF

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Publication number
EP1303404B1
EP1303404B1 EP01964839A EP01964839A EP1303404B1 EP 1303404 B1 EP1303404 B1 EP 1303404B1 EP 01964839 A EP01964839 A EP 01964839A EP 01964839 A EP01964839 A EP 01964839A EP 1303404 B1 EP1303404 B1 EP 1303404B1
Authority
EP
European Patent Office
Prior art keywords
web
printing
phase
tension
soll
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.)
Expired - Lifetime
Application number
EP01964839A
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German (de)
English (en)
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EP1303404A1 (fr
Inventor
Johannes Georg Schaede
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.)
Koenig and Bauer AG
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Koenig and Bauer AG
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Publication date
Application filed by Koenig and Bauer AG filed Critical Koenig and Bauer AG
Publication of EP1303404A1 publication Critical patent/EP1303404A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
    • B65H23/188—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web
    • B65H23/1882—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web and controlling longitudinal register of web
    • 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
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2513/00—Dynamic entities; Timing aspects
    • B65H2513/50—Timing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S101/00—Printing
    • Y10S101/42—Means for tensioning webs

Definitions

  • the invention relates to a method for regulating a web tension in a rotary printing press according to the preamble of claim 1.
  • the DE 92 18 978 U1 discloses a first control loop wherein a voltage between a printing couple and a tension roller is controlled to be constant.
  • a second control loop is controlled by means of a rotational position of the printing unit and the cutting cylinder and an optical signal which processes the position of a brand, via the drive of the cutting cylinder, an angular position of the cutting cylinder.
  • the invention has for its object to provide a method for controlling a web tension in a rotary printing press.
  • the measurement as possible after the last printing unit gives the greatest possible information about the operating condition of the web before entering the superstructure, in particular the funnel inlet.
  • the tension / elongation behavior of the web changes as the web passes through the pressure points and causes, for example, an increase in the elongation after the last printing unit.
  • the tension / elongation behavior of the web changes as the web passes through the pressure points and causes, for example, an increase in the elongation after the last printing unit.
  • in order to ensure a smooth funnel inlet of the webs in multi-lane operation is achieved in order to achieve the necessary gradation in the web tension after switching on water and color as possible only about adjustment of the infeed the appropriate web tension level of the tracks to each other.
  • the paper web expands under the influence of the fountain solution and / or the color both in the longitudinal and in the transverse direction with respect to the transport direction. This is reflected, in particular in multi-color printing with free path lengths between adjacent pressure points as elongation of the web. This elongation, as long as the effect at each pressure point remains constant over time, at least in part, for example, be compensated by register adjustment on the cylinders, by changing the position of register rollers or other facilities.
  • the stretching behavior of the paper web is subject to many influences such as Example of the stress / strain characteristics of the paper and thus the prevailing voltage, the current humidity, the moisture sensitivity, the penetration, the position of the role in their production in the drum, which is reflected for example in different winding hardness, or a location-dependent variation in Modulus of elasticity.
  • the process thus makes at least part of a continuous readjustment of the cut register of a web over all drives of the printing units or register rollers during ongoing production at least partially unnecessary.
  • Fig. 1 shows schematically the course of a web B, z. B. a printing material B or a paper web B, on its way through a printing press, in particular a web-fed rotary printing press.
  • the web B runs in the transport direction T from the paster 01 via a retraction 02 with a tension roller 03 through the example four printing units 06 to 09 to a second draw roller 11.
  • the second draw roller 11 for example, turning bars, not shown, cutting knife, more train or guide rollers and ultimately follow a funnel inlet roller 12.
  • the main draw rollers 03; 11 are in an advantageous embodiment, each with its own drive 13; 14 and a drive control 16; 17 equipped.
  • stresses S1, S2, S3 and S4 of the track B are measured in a preferred embodiment. This can be done for example via measuring rollers or the power consumption of the drive motors of the tension members.
  • the adjustment of the tension of the web B is carried out starting from the desired level of the tension S4 at the hopper inlet roller 12.
  • the level of the total tension of the web B is determined by adjustment at the infeed 02.
  • a change in the tension of the web B during the printing progress is advantageously effected by a change in the voltage S2 at the retraction 02.
  • a basic setting of the voltages in the continuous printing as shown schematically in Fig. 2, for example, on the web tension, speed - or position-controlled tension roller 03, the also controlled hopper feed roller 12 and / or dancer rollers not shown produced.
  • the web B is subject on its way from the infeed 02 to the draw roller 11 behind the last printing unit 09 longitudinal expansions of the web B with an input strain ⁇ 1 and an elongation ⁇ after the last printing unit 09th
  • ⁇ 2 represents an expansion between the first printing unit 06 and second printing unit 07, ⁇ 3 an expansion between the second printing unit 07 and third printing unit 08 and ⁇ 4 an expansion between printing unit 08 and printing unit 09.
  • the determination of the machine speed and / or the phase position of the machine can at the printing units 06; 07; 08; 09 done in various ways. For example, if each of the printing units 06; 07; 08; 09 is driven specifically, the performance data, the rotational angle positions or other characteristics of all or individual printing units 06; 07; 08; 09 are used.
  • a phase angle ⁇ 1 of the first printing unit 06 is measured via a first sensor 18.
  • This phase position ⁇ 1 can z. B. on a motor shaft of a drive 19 for a cylinder 21; in particular a drive 19 of a forme cylinder 21 of the printing unit 06, for example by means of an encoder, are tapped (shown in broken lines in Fig. 1).
  • the phase position ⁇ 1 on the transfer cylinder 22 can also be determined. As shown in FIG.
  • the arrangement of a mark 23 as a reference point 23 on the forme cylinder 21 or on the transfer cylinder 22 together with a first sensor 18 for determining the phase position ⁇ 1 or a position ⁇ 1 can also be used. This can be done for example by a scanner or a photocell. Also, a brand applied by the printing unit 06 brand 23, a part of the printed image itself, a perforation or other markings on the web B can serve as a brand 23 for determining the first phase ⁇ 1.
  • a further sensor 24 is arranged after the last printing unit, here the fourth printing unit 09.
  • a second phase position ⁇ 2 or position ⁇ 2 of a mark 26 or at least a part 26 of a printed image of a printed web B is measured.
  • the mark 26 can also be a perforation the web B or an equivalent-acting mark on the web B.
  • Phase position ⁇ 2 of the mark 26 is understood here as the time sequence of the passage of the mark 26 at the detector. If the determination of the phase position ⁇ 1 takes place via a mark 23 arranged on the web B (as mentioned as an alternative), the mark 23, which in this case is identical, can be used as mark 26 to determine the phase position ⁇ 2.
  • the phase angle ⁇ 1 of the printing unit 06 is now determined by measuring the passage of the mark 23 first. After the last printing unit 09, after passing through the printing units 06 to 09, the second phase angle ⁇ 2 of the mark 26 printed on the web B or the part of the printed image 26 is determined. Taking into account a fixed position of the measuring points to one another, a fixed phase shift ⁇ would then be detectable over a constant distance ⁇ of the path B over a constant time span. This is where the method for controlling a web tension in a rotary printing machine, since the elongation ⁇ of the web B from o. Reasons during production is not constant over time.
  • the value for the phase shift ⁇ which is determined, for example, at the beginning of the printing run and after the desired voltages S1 to S4 have been reached, is recorded as the desired value ⁇ -Soll, for example in a memory unit.
  • the target value ⁇ -Soll can vary from production to production since it depends on the register status of the printing units 06 to 09. However, it should only be specified during stationary and trouble-free operation.
  • the setting of the register level and the voltages S1 to S4 are as already shown in their basic setting i.d.R. already before the start of production, tailored to the paper properties, the web run and other o. g. Parameter takes place.
  • phase positions ⁇ 1 and ⁇ 2 and thus the phase shift ⁇ are determined and compared with the desired value ⁇ -Soll. Occurs during the printing of the current production as a result of one of the o. G. If the deviation .DELTA. In the difference .DELTA..phi. From the target value .DELTA..phi.-setpoint is due, this is an indication of a change ⁇ in the elongation .epsilon.
  • This deviation ⁇ , and thus also the change ⁇ in the strain ⁇ , is now compensated by the retraction gear 02 upstream of the first printing unit 06 via the change in the input strain ⁇ 1 until the desired value ⁇ -set for the phase shift ⁇ is restored. So that a swinging or an uneven web run of the web B is reduced or avoided, the control can also allow certain tolerances in the deviation of the phase shift ⁇ from the target value ⁇ setpoint before the countermeasure of a change in the input strain ⁇ 1 is taken.
  • the deviation .DELTA. From the nominal value .DELTA..phi.-setpoint can be superimposed, for example, as a disturbance variable .DELTA.
  • the drive control 16 of the tension roller 03 can be regulated, for example, with respect to the torque, wherein a return of the voltage S2 takes place.
  • a path of the web B via a corresponding measuring roller 27 for the measurement of the voltage S2 of the web B is dash-dotted in Fig.-1 shown.
  • the setpoint generator of the drive control system 16 is superimposed with the deviation ⁇ from the reference value ⁇ -desired disturbance variable ⁇ , for example as a correction variable ⁇ S 2.
  • Such a correction quantity .DELTA.S2 can for example be taken from a stored curve for the dependence of .DELTA.S2 over .DELTA. Or iteratively carried out by increasing or decreasing the voltage S2 until the phase shift .DELTA..phi. Again corresponds to the desired value .DELTA..phi.-setpoint.
  • DROOP behavior a load-dependent change of the setpoint value of a circumferential or angular speed or speed is called, which is both a change in the voltage of the web B, z. B. S4, as well as a change in the angular velocity considered.
  • the target value S2-Soll for the voltage S2 a correction amount superimposed ⁇ S2, which together with the actual value of the voltage S2 based on the DROOP function a corresponding lag of the draw roller 03, and thereby another voltage S2 and resulting input strain ⁇ 1 results, which is ultimately reflected as a change in the strain ⁇ .
  • the target value ⁇ -set for the drive control 16 a determined from the phase shift ⁇ and the target value ⁇ -target disturbance ⁇ for example, as a correction amount .DELTA.S2 of desired voltage S2, is superimposed.
  • the phase position ⁇ 1 can also be determined at one of the following printing units 07 to 09 instead of the first printing unit 06 in the transport direction T.
  • the phase shift ⁇ is then to be determined between the relevant printing unit 06 to 09 and the passage of the mark 23 on the sensor 24.
  • the deviation .DELTA. Of the phase shift .DELTA..phi. From the desired value .DELTA..phi.-setpoint is again referred to as a disturbance variable .DELTA the tension roller 03 processed.
  • the correction variable ⁇ S2 can also be changed as a voltage change ⁇ S2 in a different way than at the draw roller 03.
  • the change in the voltage S2 by the disturbance ⁇ also includes changes in the action of force by a dancer roller, not shown, or other adjusting devices for the voltage S2 arranged in front of the first printing unit 06.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Control Of Electric Motors In General (AREA)

Claims (14)

  1. Procédé de régulation de la tension mécanique d'une bande dans une machine à imprimer rotative, une bande (B) passant par au moins deux groupes d'impression (06 ; 07 ; 08 ; 09), et une première position en phase (ϕ1) d'un des groupes d'impression (06 ; 07 ; 08 ; 09) et une deuxième position en phase (ϕ2), mesurée derrière l'un des groupes d'impression (06 ; 07 ; 08 ; 09) en observant dans la direction de transport (T), sont déterminées, caractérisé en ce que la deuxième position en phase (ϕ2) est déterminée derrière le dernier groupe d'impression (09), en observant dans la direction de transport (T) et, en fonction de ces positions en phase (ϕ1, ϕ2) une tension mécanique (S2) de la bande (B), en amont du premier des groupes d'impression (06 ; 07 ; 08 ; 09), est modifiée.
  2. Procédé selon la revendication 1, caractérisé en ce que la deuxième position en phase (ϕ2) est déterminée sur une marque (26) se trouvant sur la bande (B).
  3. Procédé selon la revendication 1, caractérisé en ce que la tension mécanique (S2) est modifiée dans le but de modifier l'allongement à l'entrée (ε1).
  4. Procédé selon la revendication 1, caractérisé en ce que la tension (S2) est modifiée suite à un écart (Δ) entre une valeur réelle d'un déphasage (Δϕ) et une valeur de consigne (Δϕ̇-consigne,).
  5. Procédé selon l'une des revendications 2 à 4, caractérisé en ce que :
    - un premier capteur (18) détermine la première position en phase (ϕ1) du groupe d'impression (06 ; 07 ; 08 ; 09) sur un cylindre (21 ; 22),
    - un deuxième capteur (24), disposé derrière le dernier groupe d'impression (09) dans la direction de transport (T), détermine la deuxième position en phase (ϕ2) de la marque (26) imprimée sur la bande (B),
    - la valeur réelle du déphasage (Δϕ) est déterminée au moyen des deux positions en phase (ϕ1, ϕ2),
    - la valeur de consigne (Δϕ-consigne) pour le déphasage (Δϕ) est fixée en fonctionnement stationnaire et en fonctionnement perturbé,
    - et, en cas de descente au-dessous ou de dépassement d'une tolérance à déterminer de la valeur de consigne (Δϕ-consigne), du fait du déphasage (Δϕ), la modification de la tension mécanique (S2) de la bande (B) et, ainsi, d'un allongement à l'entrée (ε1) de la bande (B) avant le premier groupe d'impression (06), est effectuée.
  6. Procédé selon la revendication 1, caractérisé en ce que la modification de la tension mécanique (S2) est effectuée, de manière que la valeur du déphasage (Δϕ) soit ramenée à la valeur de consigne (Δϕ-consigne).
  7. Procédé selon la revendication 1, caractérisé en ce que la régulation de la tension mécanique (S2) s'effectue avec indication selon laquelle, entre le dernier groupe d'impression (09) et un étage de traitement suivant, un nombre des images d'impression sur la bande (B) est maintenu constant.
  8. Procédé selon la revendication 4, caractérisé en ce que, pendant l'impression continue, la valeur réelle du déphasage (Δϕ) est comparée à la valeur de consigne (Δϕ-consigne), et en ce que l'écart (Δ) du déphasage (Δϕ) par rapport à la valeur de consigne (Δϕ-consigne) est utilisé comme grandeur perturbatrice (Δ) pour la régulation d'un groupe d'introduction (02).
  9. Procédé selon la revendication 5, caractérisé en ce que la première position en phase (ϕ1) sur le cylindre (21 ; 22) est déterminée par le premier capteur (18), à l'aide d'un point de référence (23) disposé sur le cylindre (21 ; 22).
  10. Procédé selon la revendication 5, caractérisé en ce que le cylindre (21) est un cylindre de forme (21).
  11. Procédé selon la revendication 1, caractérisé en ce que la première position en phase (ϕ1) est déterminée sur le premier groupe d'impression (06), en observant dans la direction de transport (T).
  12. Procédé selon la revendication 2, caractérisé en ce que, en tant que marque (26), on utilise pour la détermination de la deuxième position en phase (ϕ2) au moins une partie de l'image d'impression (26).
  13. Procédé selon la revendication 1, caractérisé en ce que la grandeur perturbatrice (Δ) est appliquée à une régulation d'entraînement (16) d'un rouleau de traction (03) disposé en amont du premier groupe d'impression (06).
  14. Procédé selon la revendication 8, caractérisé en ce que la grandeur perturbatrice (Δ) est appliquée, en tant que grandeur de correction (ΔS2), à une valeur de consigne (S2-consigne) pour la tension mécanique (S2) entre le groupe d'introduction (02) et le premier groupe d'impression (06).
EP01964839A 2000-07-22 2001-07-19 Procede de regulation de la tension d'une bande de matiere dans une machine d'impression rotative Expired - Lifetime EP1303404B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10035788A DE10035788C1 (de) 2000-07-22 2000-07-22 Verfahren und Vorrichtung zur Regelung einer Bahnspannung in einer Rotationsdruckmaschine
DE10035788 2000-07-22
PCT/DE2001/002718 WO2002007975A1 (fr) 2000-07-22 2001-07-19 Procede de regulation de la tension d'une bande de matiere dans une machine d'impression rotative

Publications (2)

Publication Number Publication Date
EP1303404A1 EP1303404A1 (fr) 2003-04-23
EP1303404B1 true EP1303404B1 (fr) 2007-10-31

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EP01964839A Expired - Lifetime EP1303404B1 (fr) 2000-07-22 2001-07-19 Procede de regulation de la tension d'une bande de matiere dans une machine d'impression rotative

Country Status (8)

Country Link
US (1) US7040231B2 (fr)
EP (1) EP1303404B1 (fr)
JP (1) JP3876225B2 (fr)
AT (1) ATE376930T1 (fr)
AU (1) AU2001285679A1 (fr)
DE (2) DE10035788C1 (fr)
ES (1) ES2294022T3 (fr)
WO (1) WO2002007975A1 (fr)

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DE10245962A1 (de) * 2002-10-02 2004-04-15 Man Roland Druckmaschinen Ag Verfahren und Vorrichtung zum Regeln des Schnittregisters einer Rollenrotationsdruckmaschine
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EP1718552B1 (fr) * 2004-02-23 2011-02-02 Koenig & Bauer Aktiengesellschaft Dispositif de transport de rouleaux de matiere
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DE102007062454A1 (de) * 2007-12-22 2009-07-02 Robert Bosch Gmbh Verfahren zur Regelung einer Bahnspannung und/oder eines Registers
DE102008056132A1 (de) * 2008-11-06 2010-05-12 Robert Bosch Gmbh Verfahren zur Bahnspannungseinstellung
US20130104760A1 (en) * 2010-06-24 2013-05-02 Hewlett-Packard Development Company, L.P. Web press and a method of duplex printing
DE102011101842A1 (de) * 2011-05-17 2012-11-22 Robert Bosch Gmbh Verfahren zum Regeln der Bahnspannung in einer Bahnbearbeitungsmaschine
US20140053745A1 (en) * 2012-08-27 2014-02-27 Goss International Americas, Inc. Strain controlled infeed
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Also Published As

Publication number Publication date
DE10035788C1 (de) 2002-03-14
US20030164102A1 (en) 2003-09-04
JP3876225B2 (ja) 2007-01-31
EP1303404A1 (fr) 2003-04-23
JP2004504191A (ja) 2004-02-12
WO2002007975A1 (fr) 2002-01-31
ES2294022T3 (es) 2008-04-01
US7040231B2 (en) 2006-05-09
ATE376930T1 (de) 2007-11-15
DE50113198D1 (de) 2007-12-13
AU2001285679A1 (en) 2002-02-05

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