EP2259927A1 - Alimentation en encre ménageant l'encre de machines à imprimer - Google Patents

Alimentation en encre ménageant l'encre de machines à imprimer

Info

Publication number
EP2259927A1
EP2259927A1 EP09714007A EP09714007A EP2259927A1 EP 2259927 A1 EP2259927 A1 EP 2259927A1 EP 09714007 A EP09714007 A EP 09714007A EP 09714007 A EP09714007 A EP 09714007A EP 2259927 A1 EP2259927 A1 EP 2259927A1
Authority
EP
European Patent Office
Prior art keywords
pressure
ink
drive
paint
color
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
EP09714007A
Other languages
German (de)
English (en)
Other versions
EP2259927B1 (fr
Inventor
Thomas Hartung
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.)
Technotrans SE
Original Assignee
Technotrans SE
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 Technotrans SE filed Critical Technotrans SE
Publication of EP2259927A1 publication Critical patent/EP2259927A1/fr
Application granted granted Critical
Publication of EP2259927B1 publication Critical patent/EP2259927B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/08—Ducts, containers, supply or metering devices with ink ejecting means, e.g. pumps, nozzles

Definitions

  • the invention relates to a color-preserving ink supply of printing presses.
  • Printing presses must be supplied with ink during operation.
  • inking units are provided for this purpose, remove the ink from an ink fountain and transferred to the or the impression cylinder. Sometimes it is necessary to refill color in these color boxes according to consumption.
  • color is fed into the ink boxes in offset ink supplies via a pipe system.
  • double-acting piston pumps are generally used, which build up a pressure in the pipe system.
  • the control of the ink fountain filling via the control of a paint valve, which opens when needed and closes again at the end of the filling process.
  • the piston pump promotes.
  • ink supply systems such as DE 199 53 324 A1, in which the ink supply is effected via ink cartridges.
  • Another such ink supply device is disclosed in DE 10 2004 001 751 A1.
  • a first aspect of the invention relates to a method for use with a color conveying device for ink supply of an inking unit of a printing machine with ink comprising a paint reservoir, a drive which communicates with the ink reservoir and is designed such that the ink reservoir can be pressurized by means of the drive , and a control device for controlling the drive of the ink-conveying device, the method comprising the following steps: initiation of a color-conveying process,
  • the pressure increasing step may be performed simultaneously with, before or after the introducing step and the finishing step simultaneously with, before or after the step of reducing the pressure in the ink reservoir.
  • the paint reservoir may comprise a volume of a piping system which extends, for example, between a pump and one or more paint valves and connects a paint pack to one or more paint boxes of one or more inking units.
  • the ink reservoir can also comprise a volume of a color cartridge in which a color volume can be pressurized, for example via a piston.
  • the desired working pressure is preferably a pressure at which a desired conveyed color flow, that is to say a desired delivered amount of ink (weight or volume), is set per unit of time.
  • the desired working pressure can be variable over a delivery time profile, so that the conveyed color flow can be adapted to different parameters.
  • Such parameters can be, for example: the color level in the ink fountain, in particular different levels in different areas of the paint box, the type of ink used (viscosity, pressure resistance, curing under pressure, etc.), a number of opened paint valves, a total ink flow to be conveyed, etc ,
  • the pressure increasing step comprises the following steps: detecting an actual pressure in the paint reservoir,
  • An example of increasing the drive power of the drive of the conveyor device is the switching on or switching on of the drive, thus increasing one Delivery rate from zero to a value above zero.
  • a drive may be, for example, a paint pump, such as a driven via a frequency-controlled three-phase AC motor screw pump.
  • a pump can, for example, pump the color from a color bundle in the paint reservoir.
  • the drive can also be an electric motor which actuates a piston in the paint reservoir, for example via a worm drive. It is also conceivable that the drive is formed by a compressor, which acts on a piston in the ink reservoir on a side facing away from the color with a desired working pressure.
  • the drive can also be provided by a pressure accumulator, for example a compression container, which can be connected, for example, via a valve to the side of the piston remote from the ink in the paint reservoir. It is also conceivable any other type of drive that can cause a conveying of the color.
  • the drive power can be selectively raised so that the actual pressure reaches the desired working pressure and thus the delivery rate is raised to a desired level.
  • such a method has a design, according to which the step of holding the pressure comprises the following steps:
  • a desired working pressure can be defined as a range between a desired working pressure upper value and a desired working pressure lower value.
  • Maintaining the pressure has the advantage that a desired working pressure is not exceeded even if there is a change between conveyed color streams of different sizes, for example if a different number of color valves are opened in a paint conveying device with a plurality of ink valves.
  • a color conveying device which has a color pump (for example a spindle screw pump) controlled by the outlet pressure, for example, which is driven by a three-phase motor
  • an increase and / or a reduction of the working power can take place via a change in the supply frequency.
  • An example of reducing drive power besides merely reducing it, also includes reducing drive power to zero (turning off the drive).
  • increasing the drive power includes turning on the drive of the conveyor. As a result, for example, a pulsed regulation of the pressure level can take place.
  • step of adjusting the pressure in the ink reservoir (31) to an adjusted working pressure comprises the steps of:
  • a further advantageous modification relates to such a method, wherein the step of adjusting the pressure in the ink reservoir (31) to an adjusted working pressure comprises reducing the pressure to a static pressure.
  • step of reducing the pressure to a static pressure comprises one or more of the following steps:
  • the conveying device comprises a pump
  • the reversal of the conveying direction for example by a backward pumping done.
  • the pressure can be reduced to an advantageous, particularly color-sparing, minimum pressure.
  • a pressure can be set arbitrarily.
  • the pressure is set to be just above the level of atmospheric pressure, more preferably approximately at the level of ambient atmospheric pressure, or even below the level of ambient atmospheric pressure.
  • a simple sequence of method steps, which leads to a desired reduction of the pressure to the static pressure may be, for example, that initially the color valve is closed in order to interrupt the ink feed process defined. This can be preceded by switching off the drive in order not to generate unnecessarily high pressure after closing the valve.
  • Switching off can also be done simultaneously with the closing of the valve. Subsequently, the drive can reverse to further reduce the pressure. Finally, the color valve can be opened at rest to achieve a pressure equalization with the ambient pressure. This is particularly advantageous if a paint with a suitable viscosity is used, which prevents leakage of color. With multiple paint valves, only one paint valve can be opened.
  • such a method preferably has an embodiment in which the step of reducing the pressure to a static pressure comprises one or more of the following steps:
  • the bringing into association of the paint reservoir with a space in which the desired resting pressure prevails comprises bringing into contact with the ambient pressure a non-ink side of a pressure-actuated piston in the paint reservoir.
  • This variant is advantageous, for example, when using ink cartridges, in which the ink is increased by increasing a pressure in a volume adjacent to the ink in the ink reservoir.
  • the pressure in the adjacent volume can be transferred via a piston to the paint in the paint reservoir, for example.
  • the drive of the ink delivery device may include a compressor and / or a pressure vessel, which provides the desired working pressure in the adjacent volume. This can be turned off according to the preferred method or a pressure vessel can be separated via a valve from the adjacent volume.
  • the adjacent volume can be connected, for example, by opening a valve with the atmospheric pressure or with a flash tank.
  • bringing the paint reservoir into contact with a space in which the desired rest pressure prevails may include leaving one or more of the paint valves enabled to exit the ink from the paint reservoir into the ink fountain of an inking unit thus provide a connection between color reservoir and ambient air.
  • the step of initiating a dyeing operation comprises the following step:
  • color valve designates in the present case a valve which allows the exit of the ink from the ink reservoir into the ink fountain of an inking unit.
  • One or more such color valves may e.g. be provided on a movable ink cartridge or stationary on so-called Farbriosrohren, which are arranged on an inking unit that different areas of a color box can be supplied with color.
  • a further advantageous embodiment relates to a method in which the step of terminating the ink feed operation comprises the step of: - closing a paint valve.
  • such a method has a design, according to which the method further comprises the following steps: detecting an actual color level, comparing the detected actual color level with a desired color level,
  • a further advantageous modification relates to such a method, wherein the method further comprises the following step: determining the desired working pressure and / or the adjusted working pressure.
  • the step of determining the desired working pressure and / or the adjusted working pressure comprises the following steps: detecting the color level in an ink fountain (21), in particular different levels in different areas of a ink fountain (21), and /or
  • the step of determining the type of color used can be done by user input of the chromaticity and storing the parameter in the control unit. It is also conceivable that the chromaticity, for example detected by suitable sensors automatically or semi-automatically and / or stored.
  • the step of determining the total ink flow to be conveyed can be effected as a function of the number of opened valves.
  • a second aspect of the invention relates to a color conveying device for ink supply of an inking unit of a printing press with ink comprising a paint reservoir, a drive which communicates with the ink reservoir and is designed such that by means of the drive, the ink reservoir can be pressurized, and a control device for Driving the drive of the ink fountain device, wherein the drive and the control device are designed and connected to each other, that the ink fountain device is operable based on one of the above methods.
  • Embodiments in part, have features that are not necessarily required to practice the present invention, but which generally may have advantages. Thus, embodiments are also considered to be covered by the teaching of the invention, which does not have all the features of the embodiments described below. Similarly, it is conceivable to selectively combine features described with respect to different embodiments.
  • Fig. 1 shows a preferred embodiment of a device according to the invention.
  • FIG. 1 shows a preferred embodiment of a paint conveying device 30 according to the invention.
  • the ink conveying device 30 is shown in FIG Embodiment arranged on a printing press 10, of which only a part is shown in FIG.
  • the color conveying device 30 can also be arranged on a plurality of printing machines 10 and supply them with ink.
  • the ink delivery device 30 has a drive 32, a control device 33 and color valves 34.
  • the drive 32 is formed in the preferred embodiment as a screw screw pump, which can be driven by a three-phase motor.
  • a speed of the pump can be adjusted by the frequency of the three-phase current, with which the three-phase motor is supplied, so that the delivery rate of the pump is adjustable via the speed.
  • a paint reservoir 31 is formed between the drive 32 and the paint valves 34.
  • the paint reservoir 31 is therefore formed by a piping system.
  • the term paint reservoir 31 in the preferred embodiment therefore refers to the volume enclosed between pump and paint valves.
  • each with one or more color valves 34 such a piping system may be highly branched, the individual pipe sections between the pump and the individual color valves 32 may have different diameters and lengths.
  • the pump pumps paint from a Farbgebinde 35 through the piping system in the paint boxes 21. It can be adjusted by the pump per unit time color volume (color flow) depending on the type of pump, for example on the speed of the pump.
  • a pressure transducer 36 is provided just behind the drive 32. Positioning just behind the drive 32 has the advantage that in this case the highest pressure in the pipeline system can generally be detected. Alternatively or in addition to the illustrated pressure transducer 36, further pressure transducers 36 may be provided.
  • level sensors 37 are provided, via which the color level in the respective ink fountain 21 can be detected. Color levels detected by the level sensors 37 can be transmitted to a control device 33. Furthermore, the ink delivery device 30 is designed so that the filling process of the ink boxes on the control device 33 is controlled or regulated. This control can be done depending on the detected levels. For this purpose, both the drive 32 and the individual color valves 34 can be controlled by the control device 33. It is also conceivable that only either the drive 32 or the paint valves 34 are controllable. For example, could be provided instead of a control of the drive 32, a bypass valve which promotes the color flow or a portion of the color flow back into the ink container 35 when all or individual of the paint valves are closed.
  • both the drive 32 and also the valves 34 of the control device 33 controllable.
  • the control device 33 may be designed such that the drive can be controlled both with regard to the operating state (on / off) and with regard to the amount of a conveyed color flow.
  • the control device 33 is preferably designed such that in operation of the ink fountain 30, the ink flow can be reduced if only a few paint valves 34 are opened, that the ink flow can be increased when more or all valves are opened, and that the drive are turned off can when all valves are closed.
  • the ink fountain 30 is preferably designed such that the drive 32 and / or the paint valves 34 are controlled in dependence of or by the pressure transducer 36 detected pressure or pressures ,
  • Such a preferred ink delivery device 30 may e.g. operated as follows.
  • the control device 33 detects a fill level of the ink in an ink fountain 21. If a drive height that is too low is detected, the drive 32 is actuated, which then starts to pump paint from the paint drum 35 into the paint reservoir 31. At the same time, the paint valve 34 can be opened, so that the ink is conveyed with no or only a slight increase in pressure through the ink reservoir 31 to a required location in the ink fountain 21.
  • the controller 33 controls the driver 32 and the respective paint valve 34 so that the driver 32 is stopped and the paint valve 34 is closed. In this case, first the drive 32 can be stopped and then the color valve can be closed, so that a pressure peak is avoided. Between the closed color valve (s) 34 and the drive 32, the ink reservoir 31 now forms a substantially closed volume, in which there is still a residual pressure. The residual pressure can be reduced in a further process step, for example by reversing the drive 32, ie a short delivery process back into the ink container 35, or by opening one or more valves.
  • the method may be designed such that, together with the closing operation of the respective valve, the delivery rate of the drive 32, e.g. via a reduction in the rotational speed of the drive 32, is reduced. In this case as well, an avoidance of unnecessary pressure peaks can be reduced or avoided by reducing the delivery rate simultaneously or shortly before closing the respective color valve 34.
  • pressure peaks can be prevented particularly reliably if the color valves 34 to be opened are opened shortly before the drive 32 is switched on or the drive power of the drive 32 is increased, and vice versa, if the color valves 34 to be closed shortly after the drive 32 has been switched off or a reduction in the drive power to be closed.
  • a pressure still remaining in the ink reservoir 31 may e.g. by reversing the drive 32 and / or by
  • Ambient pressure by opening a paint valve can be reduced.
  • Reversing the drive 32 can be stopped if one is sufficiently lower
  • the delivery rate of the paint pump or another drive can be regulated by various parameters.
  • this can be the color level in one or more color containers or bins 21, a number of opened color valves 34, the color print and / or the operating mode of the printing press (for example, with which color is printed).

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Coating Apparatus (AREA)
  • Ink Jet (AREA)

Abstract

L'invention porte sur un dispositif (30) de transport d'encre pour l'alimentation en encre d'un mécanisme d'encrage (20) d'une machine à imprimer (10) avec une encre comportant un réservoir d'encre (31), un entraînement, qui est en liaison avec le réservoir d'encre (31) et est montée de telle sorte qu'au moyen de la commande, le réservoir d'encre (30) est apte à subir l'action d'une pression, et un dispositif de commande pour la commande de l'entraînement du dispositif (30) de transport de l'encre, l'entraînement et le dispositif de commande étant montés et reliés l'un à l'autre de telle sorte que le dispositif (30) de transport de l'encre est susceptible d'être entraîné sur la base d'un procédé. L'invention porte également sur un tel procédé, lequel comprend les étapes suivantes : déclenchement d'un processus de transport de l'encre, augmentation de la pression dans le réservoir d'encre sur une pression de travail visée, adaptation de la pression dans le réservoir d'encre à une pression de travail adaptée et fin du processus detransport de l'encre.
EP09714007.3A 2008-02-25 2009-02-23 Alimentation en encre ménageant l'encre de machines à imprimer Not-in-force EP2259927B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008011007A DE102008011007B4 (de) 2008-02-25 2008-02-25 Farbschonende Farbversorgung von Druckmaschinen
PCT/EP2009/001274 WO2009106281A1 (fr) 2008-02-25 2009-02-23 Alimentation en encre ménageant l'encre de machines à imprimer

Publications (2)

Publication Number Publication Date
EP2259927A1 true EP2259927A1 (fr) 2010-12-15
EP2259927B1 EP2259927B1 (fr) 2013-07-31

Family

ID=40720063

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09714007.3A Not-in-force EP2259927B1 (fr) 2008-02-25 2009-02-23 Alimentation en encre ménageant l'encre de machines à imprimer

Country Status (5)

Country Link
US (1) US8398192B2 (fr)
EP (1) EP2259927B1 (fr)
CN (1) CN101952123B (fr)
DE (1) DE102008011007B4 (fr)
WO (1) WO2009106281A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022174958A1 (fr) 2021-02-18 2022-08-25 Koenig & Bauer Ag Systèmes d'alimentation en encre et procédés pour alimenter en encre d'impression une unité d'encrage d'un groupe d'impression en creux, et groupe d'impression en creux et procédé de fonctionnement d'un système d'alimentation en encre
DE102021103846A1 (de) 2021-02-18 2022-08-18 Koenig & Bauer Ag Farbzufuhrsystem für die Zufuhr von Druckfarbe in ein Farbwerk, Druckwerk mit einem solchen Farbwerk sowie Verfahren zur Zufuhr von Druckfarbe in einen Farbvorlageraum eines Farbwerks
DE102021103847A1 (de) 2021-02-18 2022-08-18 Koenig & Bauer Ag Verfahren zum Betrieb eines Farbzufuhrsystem für die Zufuhr von Druckfarbe in ein Farbwerk sowie Farbzufuhrsystem

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DE19515621A1 (de) * 1995-04-28 1996-10-31 Fischer & Krecke Gmbh & Co Farbwerksystem für Druckmaschinen
EP0958920A1 (fr) * 1998-05-22 1999-11-24 Fischer & Krecke Gmbh & Co. Machine à imprimer
DE19859436B4 (de) 1998-12-22 2009-12-24 Heidelberger Druckmaschinen Ag Digitale Farbdosierung
DE19953324C2 (de) 1999-11-05 2001-12-20 Technotrans Ag Farbzufuhrsystem für Druckmaschinen
DE10246946B4 (de) * 2001-11-07 2013-06-13 Heidelberger Druckmaschinen Ag Einrichtung zum Beschichten von Bedruckstoffen in einer Druckmaschine
DE50207959D1 (de) 2001-11-22 2006-10-05 Koenig & Bauer Ag Verwendung einer Druckfarbe in einem Druckwerk
DE10305918A1 (de) * 2002-03-15 2003-10-02 Heidelberger Druckmasch Ag Versorgungseinheit für eine Flüssig-Beschichtungsanlage insbesondere einer Druckmaschine sowie Verfahren zu ihrem Betrieb
DE10236780C1 (de) * 2002-08-10 2003-09-25 Roland Man Druckmasch Dosiereinrichtung für ein flüssiges Medium in einer Verarbeitungsmaschine
DE10236781B4 (de) * 2002-08-14 2009-11-19 Manroland Ag Beschichtungseinrichtung für eine Druck- oder Beschichtungsmaschine
CN2709163Y (zh) * 2003-03-13 2005-07-13 武汉正通传动器材有限责任公司 一种印刷油墨粘度电脑控制装置
DE102004001751B4 (de) 2004-01-12 2007-09-06 Technotrans Ag Farbzufuhrvorrichtung für Druckmaschinen
US7874656B2 (en) * 2004-12-10 2011-01-25 Canon Finetech Inc. Ink-feeding device and pressure-generating method
DE102007020678A1 (de) * 2006-06-06 2007-12-13 Heidelberger Druckmaschinen Ag Verfahren zum Betreiben eines Druckmaschine-Versorgungsgerät-Systems
DE102007044216A1 (de) * 2006-10-12 2008-04-17 Heidelberger Druckmaschinen Ag Messverfahren
DE202007006450U1 (de) * 2007-05-05 2007-07-26 Industrie-Automation Vertriebs-Gmbh Einrichtung zum Dosieren eines Beschichtungsfluids in einer Verarbeitungsmaschine

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Title
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Also Published As

Publication number Publication date
US8398192B2 (en) 2013-03-19
WO2009106281A1 (fr) 2009-09-03
CN101952123A (zh) 2011-01-19
US20110001774A1 (en) 2011-01-06
EP2259927B1 (fr) 2013-07-31
DE102008011007B4 (de) 2011-11-17
CN101952123B (zh) 2013-10-02
DE102008011007A1 (de) 2009-09-03

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