EP1612043A1 - Verfahren zum Antreiben von Walzen eines Druckwerkes einer Druckmaschine - Google Patents

Verfahren zum Antreiben von Walzen eines Druckwerkes einer Druckmaschine Download PDF

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Publication number
EP1612043A1
EP1612043A1 EP05104178A EP05104178A EP1612043A1 EP 1612043 A1 EP1612043 A1 EP 1612043A1 EP 05104178 A EP05104178 A EP 05104178A EP 05104178 A EP05104178 A EP 05104178A EP 1612043 A1 EP1612043 A1 EP 1612043A1
Authority
EP
European Patent Office
Prior art keywords
rollers
torque
roller
limit value
dampening
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.)
Withdrawn
Application number
EP05104178A
Other languages
German (de)
English (en)
French (fr)
Inventor
Peter Heiler
Holger Leonhardt
Peter Dr. Palmen
Roland Vay
Andreas Alexander
Rolf Spilger
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
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
Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP1612043A1 publication Critical patent/EP1612043A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/20—Details
    • B41F7/24—Damping devices
    • B41F7/26—Damping devices using transfer rollers
    • 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

Definitions

  • the invention relates to a method for driving rollers of a printing unit of a printing press according to the preamble of claim 1.
  • a printing unit of a wet offset printing press includes a inking and dampening unit with transfer and application rollers for printing ink and dampening solution.
  • a printing unit with a color and a dampening unit roller train is known, in which, in addition to a Feuchtduktor all rollers are drivingly connected to a plate cylinder and a blanket cylinder.
  • the dampening ductor has a separate speed-controllable drive.
  • a spraying device for a cleaning fluid and a rake device is provided for cleaning the cylinders and rollers. When cleaning the cylinders and rollers, the rollers of the inking unit roller train are first cleaned.
  • a fountain roller application roller is coupled with the inking unit train with a bridge roller.
  • the dampening ductor is operated for a limited time at a peripheral speed which is above the value customary in printing operation.
  • the machine speed of the printing unit is set to a speed at which the peripheral speed of the dampening solution applicator roller driven by the plate cylinder is synchronous with that of the dampening ductor. This is to ensure that when cleaning rollers and cylinders, the external friction is maintained and a drop in the transmittable circumferential force is avoided in the roller pairing.
  • Rotary encoders are suitable as detectors for measuring the actual value of the peripheral speeds.
  • the object of the invention is to develop a method for driving rollers of a printing unit of a printing press, which allows flexible control of various operations.
  • the torque is monitored on at least one of the rollers.
  • a drive for this roller or a drive technically associated with this roller roller is provided.
  • the drive is set so that a defined slip is generated between the driven roller and one or more employed rollers.
  • a certain moment is required for rolls with a moist surface. This moment can be applied with a drive motor which is operated with a braking current. If the friction between the rollers increases, then the braking torque to be applied by the drive motor increases.
  • a drive torque is required which decreases with increasing drying of the roller surfaces due to the increasing frictional force until, finally, a braking torque must be applied to obtain a desired slip.
  • a signal is generated in a control device for the operation of the printing press.
  • the signal can be used to complete a cleaning cycle for the rolls or to change the pressure between rolls via an actuator.
  • the supply of cleaning agent can furthermore be controlled. This improves the quality of the cleaning process, reduces the cleaning time and reduces the consumption of detergent.
  • the limit can be determined by various methods.
  • One possibility is to specify a maximum braking torque by means of a machine control.
  • inputs can be made automatically by an operator or via interfaces.
  • data relating to the material at the surface of the rollers may be processed.
  • an identification number for the roll type used can be entered.
  • the monitoring of the torque of one of the rolls can be made dependent on the condition of the press. For example, the duration of exceeding a limit torque can be evaluated. Furthermore, the torque can be monitored depending on the printing unit temperature or the mains voltage.
  • the drive can be set in different ways for at least one of the rollers.
  • the current, voltage, frequency or pulse characteristics can be changed.
  • the drive ratios can be set by reducing the friction between rollers by changing the friction coefficient by adding paint, dampening solution or detergent or by reducing the contact pressure of the rollers or by reducing the absolute speed of both rollers.
  • the cleaning time can be reduced by the fact that during cleaning, the speed of the machine and thus the speed of the rollers to be cleaned is increased until a predetermined coefficient of friction is established between two rollers. If the predetermined coefficient of friction is reached, then the cleaning process is completed.
  • FIG. 1 shows a diagram of a printing unit 1 of a wet offset printing press.
  • the printing unit 1 includes a printing form cylinder 2, a transfer cylinder 3, a printing cylinder, inking rollers 4-7 and a dampening form roller 8.
  • the inking rollers 4-7 and the dampening form roller 8 can be adjusted to a printing plate 9, which is clamped on the printing form cylinder 2.
  • the inking rollers 4, 5 The inking roller 6 is in rolling contact with another ink transfer roller 12.
  • a ink transfer roller 13 bridges the ink transfer rollers 10, 12.
  • the printing unit 1 includes a color box and a Ink fountain roller, such as a fountain roller 14, which is reciprocally movable between the ink fountain roller and a ink transfer roller 15.
  • a dampening unit 21 comprises a fountain solution scoop roller 22, which projects into a dampening solution container 23, which is filled with dampening solution 24 during printing. At the dampening solution scoop roller 22 a dampening agent Desiertwalze 25 and a fountain solution transfer roller 26 is employed. Furthermore, the dampening unit 21 comprises dampening solution transfer rollers 27, each of which is in rolling contact with the dampening solution transfer roller 26 and the dampening solution application roller 8.
  • a bridge roller 29 connects the fountain solution application roller 8 and the inking roller 7.
  • spraying devices 30, 31 for water 32 and a cleaning agent 33 and a doctor device 34 are provided with a doctor blade 35.
  • the nozzles of the sprayers 30, 31 are directed to the surface of the ink transfer roller 17.
  • the doctor blade 35 can be adjusted to the ink transfer roller 10.
  • the motor 36 is the main drive motor of the wet offset printing machine and feeds a torque into a drive wheel train, to which the printing form cylinder 2, the transfer cylinder 3, the ink transfer rollers 10, 11, 16, 18 and the fountain solution transfer roller 27 is connected.
  • the drive connection of the rollers or cylinders and motors 36, 37 is symbolized by thin double lines 38.
  • the motor 37 is an auxiliary drive which is drivingly connected to the fountain solution scoop roller 22.
  • the inking rollers 4-7, the fountain solution roller 8, the ink transfer rollers 12, 13, 15, 17, 19, the color distribution roller 20, the dampening transfer rollers 26-27, the dampening agent metering roller 25 and the bridge roller 29 are friction by the adjacent actively driven rollers or . Driven the printing form cylinder 2.
  • the motors 36, 37 are connected to a control and regulating device 39.
  • the rotational movement of the printing form cylinder 2 and the dampening solution scoop roller 22 are detected by encoders 40, 41 which are in communication with the control and regulating device 39.
  • a current sensor 42 is arranged, whose output signal is proportional to the present at the fountain solution scoop roller 22 torque or drive torque. The output of the current sensor 42 is connected to the control device 39.
  • the motors 36, 37 are driven so that between the dampening solution scoop roller 22 and the adjacent dampening transfer roller 26, a slip occurs.
  • slippage is 75% while slippage is set to about 30% when cleaning.
  • the dampening transfer roller 26 has an average speed depending on the pressure to the dampening transfer roller 27 and the dampening solution scoop roller 22.
  • the control and monitoring of the motors 36, 37 is shown in more detail.
  • the power unit 45 includes an output stage 46 which supplies a current I, so that the motor 37, the dampening solution scoop roller 22 brakes.
  • the current I measured by the current sensor 42 is a measure for the occurring at the dampening scoop roller 22 braking torque.
  • the current value I ist of the current is supplied to a comparator 47, where it is compared with a setpoint I soll , which is formed by the drive control 44.
  • a difference value between actual and set value of the current is given to a regulator 48 with P-characteristic.
  • a manipulated variable for the output stage 46 is generated, which causes the target-actual difference of the current is reduced or eliminated. This ensures that there is always a defined slip between the dampening solution scoop roller 22 and the dampening solution transfer roller 26.
  • the setpoint I setpoint is specified depending on various parameters, events and operating modes.
  • a setpoint generator 49 is in the drive control 44 intended.
  • the setpoint generator 49 includes logic elements and / or computing resources for obtaining the current setpoint I soll , which are connected biretational with the machine control 43.
  • the machine controller 43 determines whether the current command value I soll should be generated for the printing operation or the cleaning operation.
  • the setpoint recovery for the cleaning operation will be described in more detail.
  • N to the speed command value for the motor 37 is n in a comparator 50 with a speed actual value is compared with the actual value n is measured by the rotary encoder 41st
  • the nominal-actual deviation of the rotational speeds n soll and n is fed to a regulator 51 with PI characteristic.
  • the output signal of the controller 51 provides an input for the determination of the setpoint value I soll for the current in the reference value generator 49.
  • a further input for the determination of the setpoint value I soll is a limit value for a torque which is preset by the machine control 43rd Because the braking torque at the fountain solution scoop roller 22 depends directly on the feed stream 1 for the motor 37, a limit value for the setpoint I set can be derived from the limit value for the torque. If the limit value for the setpoint current I setpoint is exceeded, then a checkback signal is generated and processed in the machine control 43. Then via the machine controller 43 further operations are controlled by an actuator 52, such as changing the speed of the motor 36, actuating the sprayers 30, 31 or adjusting the pressure between the fountain solution transfer roller 26 and the dampening solution scoop roller 22 and / or the dampening solution transfer roller 27.
  • an actuator 52 such as changing the speed of the motor 36, actuating the sprayers 30, 31 or adjusting the pressure between the fountain solution transfer roller 26 and the dampening solution scoop roller 22 and / or the dampening solution transfer roller 27.
  • the invention allows a check of the ventilation of the spray tube of the sprayers 30, 31. As long as only ink or fountain solution 24 between the staffed rollers in the printing unit 1, a predetermined moment is required to maintain a predetermined slip on the dampening solution scoop roller 22. As long as air is in the supply lines of the spray pipes, the moment will not change. As soon as cleaning agent 33 or water 32 comes on the rollers, the moment will decrease. This moment change can be interrogated to generate a signal that the bleeding has occurred.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP05104178A 2004-06-30 2005-05-18 Verfahren zum Antreiben von Walzen eines Druckwerkes einer Druckmaschine Withdrawn EP1612043A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004031946.4A DE102004031946B4 (de) 2004-06-30 2004-06-30 Verfahren zum Antreiben von Walzen eines Druckwerkes einer Druckmaschine

Publications (1)

Publication Number Publication Date
EP1612043A1 true EP1612043A1 (de) 2006-01-04

Family

ID=35062960

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05104178A Withdrawn EP1612043A1 (de) 2004-06-30 2005-05-18 Verfahren zum Antreiben von Walzen eines Druckwerkes einer Druckmaschine

Country Status (5)

Country Link
US (1) US20060150835A1 (ja)
EP (1) EP1612043A1 (ja)
JP (1) JP2006015750A (ja)
CN (1) CN1715048A (ja)
DE (1) DE102004031946B4 (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006022532A1 (de) * 2006-05-15 2007-11-22 Koenig & Bauer Aktiengesellschaft Verfahren zum Einstellen einer Bremskraft
EP1977892A3 (de) * 2007-03-30 2010-10-20 Koenig & Bauer Aktiengesellschaft Druckwerk einer Druckmaschine mit einem Feuchtwerk

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008010803A1 (de) * 2008-02-23 2009-08-27 Manroland Ag Verfahren zum Einfärben einer Druckform in einer Verarbeitungsmaschine
DE102008001466B4 (de) * 2008-04-30 2013-08-08 manroland sheetfed GmbH Verfahren zum Betreiben einer Druckmaschine
DE102008001860A1 (de) * 2008-05-19 2009-11-26 Manroland Ag Verfahren zum Betreiben einer Druckmaschine
DE102008053249A1 (de) * 2008-10-25 2010-04-29 Robert Bosch Gmbh Verfahren zur Steuerung einer Bearbeitungsmaschine mit angetriebenen Achsen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19645169A1 (de) * 1996-11-02 1998-05-14 Roland Man Druckmasch Verfahren zur Reinigung von Zylindern und Walzen in einer Druckmaschine
US6354202B1 (en) * 1999-03-17 2002-03-12 Heidelberger Druckmaschinen Ag Dampening unit of a planographic printing machine

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US3191528A (en) * 1963-02-21 1965-06-29 Graphic Arts Technical Foundat Automatic dampener control for a rotary lithographic press
US3911815A (en) * 1972-05-02 1975-10-14 Roland Offsetmaschf Mechanism for dampening the printing plate of an offset printing press
US4088074A (en) * 1974-11-25 1978-05-09 Dahlgren Harold P Apparatus for inking printing plates
US4130056A (en) * 1977-08-01 1978-12-19 Addressograph-Multigraph Corporation Lithographic moisture system and method
US4369734A (en) * 1980-03-17 1983-01-25 M.A.N.-Roland Druckmaschinen Aktiengesellschaft Varnishing assembly in a printing press having self-cleaning feature
DE3519840A1 (de) * 1985-06-03 1986-12-04 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Verfahren zur begrenzung der drehzahl eines antriebsmotors einer rotationsoffsetdruckmaschine
DD238574A1 (de) * 1985-06-25 1986-08-27 Polygraph Leipzig Verfahren und einrichtung zur beseitigung von putzen auf der druckplatte
US4798138A (en) * 1988-01-12 1989-01-17 Brodie George R Liquid distribution system
US5158017A (en) * 1990-09-11 1992-10-27 Sun Graphic Technologies, Inc. Press dampening system
US5562031A (en) * 1993-02-16 1996-10-08 Sun Graphic Technologies, Inc. Method and apparatus for driving a bridge roller on a printing press
EP0826501B2 (de) * 1996-09-03 2004-01-02 Gimaco Ingenieur Ag Für Maschinenbau Vorrichtung zum Einstellen einer Farbwerks- bzw. Feuchtwerkswalze einer Druckmaschine
US5909707A (en) * 1997-07-24 1999-06-08 Heidelberger Druckmaschinen Ag High-speed printing system having multiple slipping nips
DE19820315A1 (de) * 1997-10-02 1999-04-08 Heidelberger Druckmasch Ag Verfahren und Vorrichtung zur Verminderung eines Flankenwechsels zwischen Zähnen von Antriebsrädern einer Druckmaschine
US6612233B2 (en) * 2000-02-18 2003-09-02 Mitsubishi Heavy Industries, Ltd. Sheet feed offset press
DE10152839B4 (de) * 2000-11-30 2011-05-05 Heidelberger Druckmaschinen Ag Verfahren zur Positionierung einer in wenigstens zwei unterschiedliche Betriebsstellungen bewegbaren Walze einer Druckmaschine und entsprechendes Farbwerk
DE10125292A1 (de) * 2001-05-15 2002-11-21 Paul Sauer Gmbh & Co Walzenfab Walze oder Zylinder mit dauerhafter Kennung
DE10144103A1 (de) * 2001-05-15 2002-11-21 Paul Sauer Gmbh & Co Walzenfab Verfahren und Vorrichtung zur Steuerung von technischen Maschinen, Anlagen und Vorrichtungen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19645169A1 (de) * 1996-11-02 1998-05-14 Roland Man Druckmasch Verfahren zur Reinigung von Zylindern und Walzen in einer Druckmaschine
US6354202B1 (en) * 1999-03-17 2002-03-12 Heidelberger Druckmaschinen Ag Dampening unit of a planographic printing machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006022532A1 (de) * 2006-05-15 2007-11-22 Koenig & Bauer Aktiengesellschaft Verfahren zum Einstellen einer Bremskraft
DE102006022532B4 (de) * 2006-05-15 2011-06-01 Koenig & Bauer Aktiengesellschaft Verfahren zum Einstellen einer Bremskraft
EP1977892A3 (de) * 2007-03-30 2010-10-20 Koenig & Bauer Aktiengesellschaft Druckwerk einer Druckmaschine mit einem Feuchtwerk

Also Published As

Publication number Publication date
DE102004031946A1 (de) 2006-02-16
US20060150835A1 (en) 2006-07-13
CN1715048A (zh) 2006-01-04
JP2006015750A (ja) 2006-01-19
DE102004031946B4 (de) 2021-03-18

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