EP2993045A2 - Procédé d'alimentation en encre d'une machine d'impression - Google Patents

Procédé d'alimentation en encre d'une machine d'impression Download PDF

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Publication number
EP2993045A2
EP2993045A2 EP15177845.3A EP15177845A EP2993045A2 EP 2993045 A2 EP2993045 A2 EP 2993045A2 EP 15177845 A EP15177845 A EP 15177845A EP 2993045 A2 EP2993045 A2 EP 2993045A2
Authority
EP
European Patent Office
Prior art keywords
ink
refilling
refill
color
storage chamber
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.)
Granted
Application number
EP15177845.3A
Other languages
German (de)
English (en)
Other versions
EP2993045B1 (fr
EP2993045A3 (fr
Inventor
Dieter Schaffrath
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 EP2993045A2 publication Critical patent/EP2993045A2/fr
Publication of EP2993045A3 publication Critical patent/EP2993045A3/fr
Application granted granted Critical
Publication of EP2993045B1 publication Critical patent/EP2993045B1/fr
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F31/00Inking arrangements or devices
    • B41F31/02Ducts, containers, supply or metering devices
    • B41F31/022Ink level control devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F33/00Indicating, counting, warning, control or safety devices
    • B41F33/02Arrangements of indicating devices, e.g. counters
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41PINDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2233/00Arrangements for the operation of printing presses
    • B41P2233/30Measuring or controlling the consumption of ink

Definitions

  • the present invention relates to a method for feeding ink in a printing press, wherein an inking unit comprises an ink fountain and a roller, which together define a storage chamber having a cross-sectional area which varies in the vertical direction, wherein refilling of ink into the storage chamber based on a Characteristic curve takes place. Moreover, the present invention relates to a printing machine for carrying out the method.
  • a conventional inking unit has a paint box with a metering device, which is divided into ink zones.
  • An anilox inking unit has an anilox roller and a squeegee box that work together.
  • refilling the ink can be done manually or automatically.
  • the operator may use a spatula to scoop the paint from a can into the ink fountain.
  • a cartridge can be arranged above the ink fountain, which cartridge is dispensed in a controlled manner as a function of measurement signals from a fill level sensor.
  • the invention has for its object to provide a further method for supplying color and to create a suitable for performing the method printing machine.
  • an inking unit has an ink fountain and a roller, which together define a storage chamber with a cross-sectional area, which cross-sectional area changes in the vertical direction.
  • refilling of ink into the storage chamber takes place on the basis of a characteristic which represents the volume of a supply of ink in the storage chamber as a function of the filling level of the ink supply and takes into account said change in the cross-sectional area of the storage chamber.
  • the refilling of the paint can be done manually or automatically.
  • an indication can be controlled based on the characteristic.
  • the method is suitable for conventional inking and particularly suitable for anilox inking.
  • a measurement sub-edition is formed by a certain number of sheets of an edition, based on which a color consumption per sheet is calculated programmatically in a computer.
  • At least one refilling parameter for refilling ink into the storage chamber is programmatically calculated.
  • the at least one refill parameter is displayed to the operator on a display.
  • the at least one refill parameter is the sheet number of that sheet of the overlay at which machine refilling must be done at the latest, or is the at least one refill parameter the number of sheets that can still be printed with the ink volume stored in the ink box without refilling.
  • the at least one refill parameter is the remaining time during which printing can still be carried out without refilling at a certain printing speed.
  • the at least one refill parameter is a required amount of ink which must be refilled in the ink fountain at the next replenishment.
  • the inking unit is an anilox inking unit
  • the ink fountain is a squeegee box
  • the roller is an anilox roller
  • the printing machine according to the invention comprises an inking unit and a computer, which comprises a program for carrying out the method according to the invention.
  • the printing machine according to the invention may be an offset printing machine, preferably an offset printing machine for printing on sheets.
  • FIG. 1 is a detail of a printing machine 1 shown.
  • an ink fountain 3 and a roller 4 are shown, which are components of an inking unit 2 of the printing machine 1.
  • the inking unit 2 is an anilox inking unit and the roller 4 is an anilox roller.
  • the ink fountain 3 is a doctor blade box with a squeegee 9 and a rear wall 10.
  • an ink reservoir 7 is stored, which is located in a storage chamber 5, which is bounded by the ink fountain 7 and the roller 4.
  • the rear wall 10 is mounted so as to be adjustable about a swivel joint 11 in order to be able to lift the ink supply 7 by displacement to a level above a cutting edge of the doctor blade 9 by means of the adjustment, which takes place before the start of printing.
  • a level sensor 12 is arranged, which is directed to the ink supply 7 in order to measure the level caused by the ink supply 7 level in the ink fountain 3.
  • the level sensor 12 measures the distance between the level sensor 12 and the color surface (color level) and is a non-contact sensor, such as an ultrasonic sensor.
  • the level sensor 12 and a display 13 are connected to an electronic control device 14 which comprises a computer or microprocessor in which a program runs.
  • the controller 14 receives the measurement signals from the level sensor 12 and controls the display 13, which is a touch screen or other screen.
  • a cross-sectional area 6 of the storage chamber 5 extends perpendicular to the image plane of FIG. 1 ,
  • the size of the cross-sectional area 6 changes in the vertical direction because the rear wall 10 and the peripheral surface of the roller 4 do not extend parallel to each other in the vertical direction.
  • the cross-sectional area 6 is the smallest in the region of a constriction between the rear wall 10 and the peripheral surface and, starting from this constriction, becomes larger upward because the rear wall 10 diverges from the peripheral surface.
  • the reference symbol “M1" denotes a measuring length of the filling level sensor 12 which corresponds to a permissible maximum fill level F1 (cf. FIG. 2 ) of the ink supply 7 corresponds.
  • the reference symbol “M max” denotes a measuring length which corresponds to a permissible minimum filling level height "F min " (cf. FIG. 2 ) corresponds.
  • the permissible minimum level height F min is selected so that the level of the ink supply 7 is always above the cutting edge of the doctor blade 9 in the printing operation. With the filling level decreasing in ink operation due to the ink consumption, the measuring length increases, ie the measured distance between the filling level sensor 12 and the color level of the ink supply 7.
  • the level of the filling device F1, F min calculated.
  • measuring lengths between M1 and M max are also measured, and fill levels between F1 and F min are calculated.
  • the maximum fill level F1 is the so-called start level.
  • FIG. 2 is a diagram with an abscissa for the filling level and an ordinate for the color volume of the ink supply 7 shown.
  • the characteristic curve 15 in the diagram has been determined by a series of tests, with each measured fill level height-ie, measured measurement length and fill level calculated therefrom-being assigned a different resulting color volume V1, V2. The series of experiments is required to account for the change in cross-sectional area 6.
  • the characteristic curve 15 is stored, for example as a value table, in the computer 8 and is part of the program which runs in the computer 8. By the characteristic curve 15, the relationship between the change in the level height and the color volume change .DELTA.V is mapped.
  • FIG. 3 shows the arrangement FIG. 1 with a level F2 (cf. FIG. 2 ).
  • level F2 corresponds to an enlarged measuring length M2.
  • the difference ⁇ M between the measuring lengths M1, M2 in FIG. 3 is equal in magnitude to the color volume change ⁇ V in FIG. 2 ,
  • FIG. 4 is the characteristic 15, which in FIG. 2 is shown only schematically, shown in practice-relevant form.
  • the characteristic curve 15 is by stepwise filling of the storage chamber 5 with defined amounts of ink and the reading of the associated Level heights have been determined.
  • the curve 15 whose determined curve support points are shown, which may be stored in the form of value pairs in the computer 8.
  • the calculator 8 calculates the consumption per sheet as a quotient of the color volume change divided by the number of sheets printed with the color volume difference amount.
  • This number of printed sheets is called a measurement submission and is set.
  • the measurement submission may be set at low area coverage with 1000 arcs and at large area coverage with 300 arcs.
  • the decreasing color level may be further measured and the calculated value for color consumption per sheet may be updated.
  • the computer 8 of the still available color supply is calculated by the computer 8 of the still available color supply and displayed on the display 13, e.g. on the control panel.
  • the display can be an absolute value in cubic centimeters or as a percentage value and the display can be visualized as a bar chart. At the end of the job, this information is used by the machine operator to assess whether he has to add ink to the ink fountain for a subsequent print job.
  • the calculation of the range with available ink supply works as follows: The machine operator selects the desired print run height on the control panel. Upon reaching this limit, the printing press stops. 1 automatically. After passing through the measurement sub-edition, the values for the color consumption per sheet and for the color stock still available are available. By the prediction algorithm of the program, which runs in the computer 8, it is determined whether the remaining available ink supply is sufficient to complete the print job before reaching the allowable minimum level height F min .
  • the range is expressed as the number of printable sheets and is calculated as the quotient of the available ink supply divided by the ink consumption per sheet. On the display 13 can be displayed, for example, that the range is still 4,371 sheets.
  • the computer 8 makes the prediction of the next Nach garllzeithuis as follows:
  • the prediction algorithm checks on the basis of the preselected number of copies of the print job, with the existing color supply, the edition can be printed without refilling to the end.
  • the difference number of sheets formed from the number of sheets of the preselected number of copies minus the number of sheets of the measuring partial edition must be smaller than the number of sheets of the calculated range. If the available ink supply is smaller than the requirement for the print job, a warning is issued and an indication is made as to which number of sheets of the total print run a refilling must take, so that the permissible minimum fill level height F min is not undershot.
  • 6,000 sheets - 1,000 sheets 5,000 sheets> 4,371 sheets.
  • the prediction algorithm determines the latest refilling time so that the permissible minimum filling level height F min is not undershot.
  • the refill time can be indicated by an arc number in the run counter of the press or by a time duration.
  • the sheet number is calculated by adding the number of sheets of the already printed measurement sheet to the sheet count of the calculated range. Accordingly, the display 13 indicates to the machine operator at which sheet number the refilling must have taken place at the latest.
  • the so-called refill sheet has the sheet number 5.371 (1,000 sheets of the measurement partial edition plus 4,371 sheets of the calculated range).
  • the time of refilling can be done by specifying the refill sheet (sheet number, at which replenishment must be made at the latest) can also be specified by specifying the time, which makes it easier for the machine operator to coordinate his activities with one another.
  • the time is calculated by dividing the calculated range by the print speed.
  • the following information for example, can be displayed on the display 13. "Refill required in printing unit 2. Sheet number 5.371 - Remaining time 21 minutes 51 seconds". On the display 13, the time of refilling or the remaining time can be displayed by a countdown timer.
  • the filling level height up to which the range is calculated, can be selected by the machine operator.
  • the prediction of the refilling quantity required at the time of refilling is calculated in the computer 8 as follows: Depending on the preselected number of copies and the ink requirement, a different amount of ink is required for refilling. If the remaining print is low after the first replenishment, then only the smallest possible but sufficient amount of ink should be topped up in order to minimize the cleaning effort after completion of the print job. If the remaining print is still very large after the first refill, then if possible so much ink should be refilled that the complete print job can be printed to the end.
  • the prediction algorithm contained in the program of the calculator 8 calculates the replenishment amount as follows: The replenishment amount is the product of the color consumption per arc multiplied by the sheet difference calculated from the preselected edition amount minus the refill sheet number.
  • Prediction algorithms can also be used in automated refill printing.
  • the level sensor 12 with the controller 14 monitors the level height and keeps it constant. If the level drops steadily even though the cartridge has received the command to replenish, the control device 14 or the computer 8 contained therein concludes that the cartridge is empty.
  • a warning message "Cartridge empty” is displayed on the display 13. The warning message "Cartridge empty” activates the prediction algorithm and calculates a prediction, whether the current print job can be finished with the still available color supply. An unnecessary color change can be avoided.

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  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP15177845.3A 2014-09-05 2015-07-22 Procede d'alimentation en encre d'une machine d'impression Active EP2993045B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014013226.9A DE102014013226A1 (de) 2014-09-05 2014-09-05 Verfahren zum Zuführen von Farbe in einer Druckmaschine

Publications (3)

Publication Number Publication Date
EP2993045A2 true EP2993045A2 (fr) 2016-03-09
EP2993045A3 EP2993045A3 (fr) 2016-04-13
EP2993045B1 EP2993045B1 (fr) 2018-09-19

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EP15177845.3A Active EP2993045B1 (fr) 2014-09-05 2015-07-22 Procede d'alimentation en encre d'une machine d'impression

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EP (1) EP2993045B1 (fr)
CN (1) CN106183402B (fr)
DE (1) DE102014013226A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3689611A3 (fr) * 2018-12-14 2020-10-21 manroland Goss web systems GmbH Procédé de fonctionnement d'une machine d'impression

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017215745A1 (de) * 2017-09-07 2019-03-07 Koenig & Bauer Ag Verfahren zum Betreiben einer Druckmaschine
DE102019201684A1 (de) * 2019-02-08 2020-08-13 Koenig & Bauer Ag Druckmaschine mit einem Werk mit mindestens einem Rotationskörper und einer Reinigungseinrichtung und Verfahren zum Betreiben einer Druckmaschine mit einem Werk
DE102022114770B3 (de) * 2022-06-13 2023-06-01 Heidelberger Druckmaschinen Aktiengesellschaft Verfahren zur Bestimmung eines Vorratsbehälters für eine drucktechnische Flüssigkeit

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10009664A1 (de) 2000-02-24 2001-08-30 Koenig & Bauer Ag Verfahren und Einrichtung zum Zuführen von Druckfarbe in Farbkästen von Druckmaschinen
DE102013003923A1 (de) 2012-04-05 2013-10-10 Heidelberger Druckmaschinen Ag Verfahren zum Zuführen von Farbe in einem Aniloxfarbwerk mit einer Rasterwalze und einem Rakelfarbkasten

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19906078B4 (de) * 1998-03-14 2006-11-16 Heidelberger Druckmaschinen Ag Verfahren zur Steuerung des Füllstandes für Druckfarbe in einem Farbkasten
EP1060886B1 (fr) * 1999-06-19 2002-07-31 Koenig & Bauer Aktiengesellschaft Procédé et dispositif pour alimenter en encre l'encrier des machines d'impression
CN102649347B (zh) * 2011-02-26 2016-08-03 海德堡印刷机械股份公司 印刷机中墨盒挠曲的补偿
CN202242319U (zh) * 2011-09-29 2012-05-30 杨逴先 用于印刷机的油墨预置仪

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10009664A1 (de) 2000-02-24 2001-08-30 Koenig & Bauer Ag Verfahren und Einrichtung zum Zuführen von Druckfarbe in Farbkästen von Druckmaschinen
DE102013003923A1 (de) 2012-04-05 2013-10-10 Heidelberger Druckmaschinen Ag Verfahren zum Zuführen von Farbe in einem Aniloxfarbwerk mit einer Rasterwalze und einem Rakelfarbkasten

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3689611A3 (fr) * 2018-12-14 2020-10-21 manroland Goss web systems GmbH Procédé de fonctionnement d'une machine d'impression

Also Published As

Publication number Publication date
CN106183402A (zh) 2016-12-07
CN106183402B (zh) 2019-01-08
EP2993045B1 (fr) 2018-09-19
EP2993045A3 (fr) 2016-04-13
DE102014013226A1 (de) 2016-03-10

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