EP2127874B1 - Verfahren zum Betreiben einer Druckmaschine - Google Patents

Verfahren zum Betreiben einer Druckmaschine Download PDF

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Publication number
EP2127874B1
EP2127874B1 EP09159436A EP09159436A EP2127874B1 EP 2127874 B1 EP2127874 B1 EP 2127874B1 EP 09159436 A EP09159436 A EP 09159436A EP 09159436 A EP09159436 A EP 09159436A EP 2127874 B1 EP2127874 B1 EP 2127874B1
Authority
EP
European Patent Office
Prior art keywords
roller
motor
clutch
mode
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.)
Active
Application number
EP09159436A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2127874A1 (de
Inventor
Ulrich Luckhardt
Oliver Nowarra
Willi Stutz
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
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Filing date
Publication date
Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP2127874A1 publication Critical patent/EP2127874A1/de
Application granted granted Critical
Publication of EP2127874B1 publication Critical patent/EP2127874B1/de
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Classifications

    • 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

Definitions

  • the present invention relates to a method for operating a printing press in a print mode and another mode of operation, in particular a maintenance mode.
  • the maintenance of printing presses between printing jobs involves changing the printing plates and washing the inking units.
  • a simultaneous implementation of the plate change and the Farbwerks redesigns is aimed at shortening the maintenance.
  • the plate cylinder is driven by the main motor of the printing press and the inking unit by a separate motor.
  • EP 1167026 B 1 is a printing machine with the required motors described.
  • a long-known problem with printing machines is that of the lifter.
  • the cause of the lifter stroke is an existing during the impact of the vibrating roller on the distributor roller between the peripheral speeds of these two rollers difference. By this difference, torsional vibrations are caused, which are transmitted from the distributor roller to subsequent rollers and cylinders and reduce the print quality.
  • Various measures have already been proposed to solve the problem.
  • Another measure consists of the friction roller associated clutch, via which the drive roller is driven rotatively in the washing operation. In printing operation, the clutch is open and the friction roller is fricatively driven by a neighboring roller. This measure is in DE 4445964 B4 described.
  • GB-A-1472654 is a printing machine with a ink fountain roller and a distributor roller described.
  • the ink fountain roller and the distributor roller each have their own motor.
  • the motors are controllable such that the speed behavior of the ink fountain roller and the distributor roller is accurately adjusted to the machine speed.
  • EP-A-0699524 is a printing machine described in which all the form cylinder of a printing unit are driven by a separate electric motor.
  • the form cylinder are not in mechanical drive connection with each other.
  • the invention has for its object to provide an improved method for operating a printing press.
  • it is the object of the invention to specify a method which improves the shortening of the maintenance time and / or with regard to the reduction of the lifter stroke.
  • a printing press is operated in a printing operating mode and another operating mode.
  • a lift roller is periodically brought into contact with a first roller of an inking unit of the printing press.
  • the first roller is rotationally driven by a first motor and a second roller of the inking unit is rotatively driven by a second motor.
  • the first motor is controlled by a control device such that the first roller rotates at a speed that is in a constant ratio with a speed of the second roller.
  • the first roller and the second roller are rotationally driven by the first motor, and torque is transferred from the first motor to the second roller via the clutch.
  • the other operating mode is a maintenance mode, for. B. a cleaning mode.
  • the inking unit can be washed.
  • the motor current of the first motor is increased periodically in the pressure operating mode by the control device.
  • These Motorstromerhöhungen can each shortly before the impact of the squeegee roller on the first roller, so that the circumferential speed of the first roller is kept constant despite the impingement by the motor current increases.
  • the clutch is rotated while maintaining a backlash of the clutch in the pressure operating mode.
  • the backlash between a first coupling half and a second coupling half of the coupling can be maintained in the circumferential direction.
  • the first coupling half can be driven in rotation by the first motor and at the same time the second coupling half can be driven by the second motor.
  • the two coupling halves can be driven so coordinated that none of the two coupling halves entrains the other and seen in the circumferential direction is a dead path or a game between a driving surface of the first coupling half and a driving surface of the second coupling half.
  • a lithographic offset printing machine for printing sheets can be used.
  • FIG. 1 shows a detail of a printing press 1 for printing on sheets.
  • the detail shows a printing unit for offset printing.
  • the printing unit comprises an impression cylinder and a blanket cylinder, which are not shown in the drawing. Furthermore, it comprises a printing form cylinder 2, an unspecified dampening unit for moistening the printing forme cylinder 2 and an inking unit 3 for coloring the printing forme cylinder 2.
  • the inking unit 3 is a lifting inking unit and comprises an ink fountain with a ink fountain roller 4, a first roller 5, a plurality of second rollers 6 and unspecified further rollers, including transfer rollers and applicator rollers.
  • the second rollers 6 are rotationally driven by gears, which are arranged coaxially with the second rollers 6 and rotatably connected.
  • the inking unit 3 comprises a lifting roller 7, which oscillates back and forth between the ink fountain roller 4 and the first roller 5 and alternately comes into contact with the two rollers 4, 5.
  • a spraying device 8 for supplying detergent and rinse water into the inking unit 3 and a squeegee device 9 for subsequently removing the detergent-ink mixture from the inking unit 3 are provided for a cleaning mode.
  • FIG. 2 shows that a first motor 11 for rotatably driving the first roller 5 is connected to the latter.
  • the first motor 11 is arranged coaxially with the first roller 5, so that the motor shaft of the first motor 11 and the geometric axis of rotation of the first roller 5 are aligned.
  • a second motor 12 is connected to these rollers 6 for rotationally driving the second rollers 6 via the aforementioned gear 23.
  • the motors 11, 12 are electric motors.
  • the second motor 12 is the so-called main drive of the printing machine 1 and drives, among other things, the printing form cylinder 2 (see. FIG. 1 ) rotatively.
  • the first motor 11 is a separate motor and can be controlled by means of an electronic control device 37 as a function of the second motor 12.
  • Components of the transmission 23 are in addition to the gears and a first clutch 21 and a second clutch 22nd
  • the first roller 5 is arranged between the first motor 11 and the first clutch 21, so that a torque generated by the first motor 11 can be transmitted to the first clutch 21 via the first roller 5.
  • the first clutch 21 is disposed between the first roller 5 and a coaxial with the first roller 5 gear of the transmission 23 and connects this gear with the first roller 5 temporarily rotationally fixed when the clutch 21 is in its designated coupling position.
  • the first clutch 21 comprises a first coupling half 31, which is permanently connected to the first roller 5 and thus with the first motor 11 rotatably fixed, and a second coupling half 32, which is permanently connected to the first roller 5 coaxial gear rotatably.
  • the second clutch 22 is a shift clutch associated with an actuator, not shown in the drawing, which opens the second clutch 22 so that it does not transmit torque, and closes so that it transmits a torque.
  • the second clutch 22 is disposed between two gears of the transmission 23 to transmit in the closed switching position of the second clutch 22, the torque generated by the second motor 12 of the one of the two coaxial with the second clutch 22 gears to the other.
  • FIGS. 3a and 3b show in simplified form the structural design of the first clutch 21.
  • One of the two coupling halves 31, 32, here the first coupling half 31, has a driver 33 which in the closed position (see. FIG. 3b ) of the first clutch 21 on a stop surface of the other coupling half, here the second Coupling half 32, applied.
  • the driver 33 is arranged eccentrically with respect to the geometric axis of rotation of the coupling halves 31, 32.
  • the driver 33 may, for. Example, be a relative to said rotation axis parallel pin which is stuck in the first coupling half 31, or be a functionally identical projection with such a pin.
  • the driver 33 projects into an arcuate groove 34, which is introduced into the second coupling half 32.
  • the aforementioned abutment surface is formed by an inside end surface of the groove 34.
  • the driver 33 - groove 34 - combination diametrically another such combination can be arranged.
  • FIG. 4 a diagram is shown whose coordinate indicates the current I and whose abscissa indicates the time t.
  • the curve entered in the diagram shows the Motor current of the first motor 11 over time t. Recognizable are periodically repeating increases in current 36, which occur in the rhythm of the vibration of the vibrating roller 7. Each of the current increases 36 occurs shortly before one of the repetitive with the same periodicity contacts the lifter roller 7 with the first roller 5.
  • the first motor 11 is so shortly before the faster rotating first roller 5, the slower rotating lifter roller 7 during the contact of the two Rollers 5, 7 rotatably accelerated together with an increased flow, so that for this acceleration of the squeegee roller 7 sufficient torque is available and thus no excessive slip within the inking unit 3 between the first roller 5 and the second roller 6 during the acceleration phase.
  • the acceleration of the lifting roller 7 is ensured by the first roller 5, without a speed drop of the first roller 5 and a resulting slip of the first roller 5 to the rest of the inking unit 3, guaranteed.
  • the momentum of the lifting roller 7, the so-called lifter stroke can be at least partially compensated by a torque precontrol without the control having to react to a speed deviation.
  • the torque precontrol takes place on the basis of a characteristic field that describes the torque to be controlled as a function of the machine rotation angle and the engine speed. It is recommended to provide an acceleration control loop in addition to the described speed control loop. This can measure, for example by a Ferraris sensor, the current acceleration of the first roller 5 and react very quickly to the disturbance torque of the lifting roller 7, before the speed of the first roller 5 breaks down.
  • the cleaning mode of the inking unit which is a maintenance mode
  • the detergent and the rinse water are successively introduced by means of the sprayer 8 in the inking unit 3 and the soiled detergent is removed by means of the squeegee device 9 from the inking unit 3.
  • the second clutch 22 is opened, so that the second rollers 6 are no longer rotatably driven by the second motor 12.
  • the second rollers 6 are driven together with the first roller 5 by the first motor 11, the first clutch 21 being closed.
  • the switching condition is therefore the angle of rotation which occupies one half of the coupling relative to the other half coupling.
  • the first clutch 21 is not as a self-switching clutch, but as a z. B. formed by an actuator switchable clutch.
  • rollers 5, 6, in the manner described in connection with the maintenance mode, wherein these rollers 5, 6 are driven only by the first motor 11, in other operating modes different from the printing mode, for. B. during a so-called Competitioninlaufes be driven.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)
EP09159436A 2008-05-27 2009-05-05 Verfahren zum Betreiben einer Druckmaschine Active EP2127874B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008025345A DE102008025345A1 (de) 2008-05-27 2008-05-27 Verfahren zum Betreiben einer Druckmaschine

Publications (2)

Publication Number Publication Date
EP2127874A1 EP2127874A1 (de) 2009-12-02
EP2127874B1 true EP2127874B1 (de) 2011-08-24

Family

ID=40984295

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09159436A Active EP2127874B1 (de) 2008-05-27 2009-05-05 Verfahren zum Betreiben einer Druckmaschine

Country Status (5)

Country Link
US (1) US8156865B2 (zh)
EP (1) EP2127874B1 (zh)
CN (1) CN101590720B (zh)
AT (1) ATE521475T1 (zh)
DE (1) DE102008025345A1 (zh)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008000257B4 (de) * 2008-02-08 2010-05-12 Koenig & Bauer Aktiengesellschaft Farbwerk einer Druckmaschine
CN102555424B (zh) * 2010-12-20 2015-05-20 海德堡印刷机械股份公司 具有驱动传动装置的印刷机
CN102350869B (zh) * 2011-10-29 2013-07-03 无锡宝南机器制造有限公司 墨辊离合装置
CN106994819B (zh) * 2015-11-18 2019-12-03 海德堡印刷机械股份公司 用于运行印刷机的方法

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2283003A (en) * 1940-05-13 1942-05-12 C B Henschel Mfg Co Printing apparatus
US2545836A (en) * 1946-08-12 1951-03-20 Hoe & Co R Ink and water motion trip for offset printing machines
DE2324684C3 (de) * 1973-05-16 1978-10-26 Maschinenfabrik Augsburg-Nuernberg Ag, 8900 Augsburg Färb- oder Feuchtwerksantrieb für Rotationsdruckmaschinen
ATE101084T1 (de) * 1990-02-27 1994-02-15 Komori Printing Mach Druckmaschine mit beweglichem farbwerk.
CA2049154C (en) 1990-09-14 1994-07-26 Glenn Alan Guaraldi Isolated ink feed mechanism
US5152224A (en) 1990-09-14 1992-10-06 Harris Graphics Corporation Isolated ink feed mechanism
DE4430693B4 (de) 1994-08-30 2005-12-22 Man Roland Druckmaschinen Ag Antriebe für eine Rollenrotations-Offsetdruckmaschine
US6644184B1 (en) * 1995-02-09 2003-11-11 Man Roland Druckmaschinen Ag Offset printing machine
DE4445964B4 (de) 1994-12-22 2005-12-01 Heidelberger Druckmaschinen Ag Farbwerk einer Druckmaschine
DE19520841C2 (de) 1995-06-08 2003-12-04 Roland Man Druckmasch Farbwerk für ein Offsetdruckwerk und Verfahren zum Einfärben und Feuchten der Druckform
DE19611048A1 (de) * 1996-03-20 1997-09-25 Windmoeller & Hoelscher Druckmaschine, vorzugsweise Flexodruckmaschine
DE19715614B4 (de) 1997-04-15 2005-06-02 Man Roland Druckmaschinen Ag Farbwerk für eine Rotationsdruckmaschine
DE10000903A1 (de) 1999-02-05 2000-08-10 Heidelberger Druckmasch Ag Verfahren zum Betrieb einer Druckmaschine und Druckmaschine zur Durchführung des Verfahrens
JP4250265B2 (ja) * 1999-07-19 2009-04-08 リョービ株式会社 オフセット印刷機
JP4582867B2 (ja) 2000-06-23 2010-11-17 株式会社小森コーポレーション 印刷機
EP1314560B1 (en) * 2001-11-27 2008-09-17 Komori Corporation Printing press
DE102004021328B4 (de) * 2003-05-28 2014-01-30 Heidelberger Druckmaschinen Ag Verfahren zum Betrieb einer Druckmaschine
CN1853929B (zh) * 2005-04-29 2011-05-18 海德堡印刷机械股份公司 印刷机及其运行方法
DE102007049916A1 (de) * 2007-10-18 2009-04-23 Heidelberger Druckmaschinen Ag Verfahren zum Betreiben eines Druckwerks einer Druckmaschine

Also Published As

Publication number Publication date
DE102008025345A1 (de) 2009-12-03
US20090293747A1 (en) 2009-12-03
US8156865B2 (en) 2012-04-17
CN101590720A (zh) 2009-12-02
ATE521475T1 (de) 2011-09-15
EP2127874A1 (de) 2009-12-02
CN101590720B (zh) 2012-05-23

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