EP0970810A1 - Verfahren und Vorrichtung zum Reinigen des Farbtransportsystems einer Druckmaschine - Google Patents
Verfahren und Vorrichtung zum Reinigen des Farbtransportsystems einer Druckmaschine Download PDFInfo
- Publication number
- EP0970810A1 EP0970810A1 EP98111701A EP98111701A EP0970810A1 EP 0970810 A1 EP0970810 A1 EP 0970810A1 EP 98111701 A EP98111701 A EP 98111701A EP 98111701 A EP98111701 A EP 98111701A EP 0970810 A1 EP0970810 A1 EP 0970810A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ink chamber
- chamber
- doctor blade
- ink
- slide
- 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
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F35/00—Cleaning arrangements or devices
-
- 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
- B41F31/027—Ink rail devices for inking ink rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
- B41P2235/00—Cleaning
- B41P2235/10—Cleaning characterised by the methods or devices
Definitions
- the invention relates to a method for cleaning the color system Printing machine, for example a flexographic printing machine with an ink chamber, by a chambered doctor blade that can be adjusted to the circumference of an application roller is formed.
- Flexographic printing machines have, for example, one with a roller Cup grid provided with the liquid, with solvent diluted ink is applied to an impression cylinder. While of the printing operation, the chambered doctor blade is pneumatically attached to the circumference of the application roller turned on so that the ink cups with each revolution of the Applicator roller after applying its ink to the printing parts of the Have released printing cylinders, as they pass through the ink chamber filled with paint again.
- the color system also includes one Conveying device with a feed pump arranged in a feed line, with which the printing ink from an ink container into the chamber doctor blade is conveyed, and a return pump arranged in a return line, with which the ink is removed from the doctor blade and again is returned to the paint container. This way the printing ink circulated continuously in a closed circuit during printing.
- the same conveyor is used instead the printing ink a cleaning liquid, such as water, soapy water or solvent to pump through the doctor blade to do this Flush and clean the color system.
- a cleaning liquid such as water, soapy water or solvent
- the object of the invention is a faster and more thorough cleaning of the To enable color system with reduced solvent use.
- This object is achieved in that the ink chamber is blown out with a gaseous pressure medium.
- the gaseous pressure medium for example compressed air
- the gaseous pressure medium becomes relatively high Flow velocity through the ink chamber so that liquid residues, that wet the walls of the paint chamber or in recesses collected, are carried away by the air flow. On in this way the liquid residues can be considerably reduced, so that the number of rinses and thus the consumption of solvent can be reduced without impairing the cleaning success can.
- Blowing out with compressed air can occur at various stages in the cleaning process and possibly also take place several times, for example immediately after draining the ink after pre-cleaning with a cleaning fluid and after every rinse during the main cleaning.
- the in Color system remaining residues of cleaning fluid or solvent reduce considerably so that when filling with new printing ink an uncontrolled one Dilution of the printing ink is avoided. That is why of particular advantage because the correct solvent concentration and the correct viscosity of the printing ink is a crucial parameter for the print quality is.
- the supply and discharge of the compressed air can be via the supply line and the return line of the color system, so that the entire color system is blown out in one go. In this way, the in the sagging sections of the tubing collected liquid residues remove.
- a Cleaning liquid with the help of compressed air in the ink chamber or in entire color system fogged.
- Color system to be flooded with cleaning fluid, but through the Liquid mist only becomes the walls of the paint chamber and possibly the Wet hoses with the cleaning liquid.
- This allows the Reduce the use of cleaning fluid considerably.
- This liquid is practically not contaminated with the paint residues and can be recovered in a liquid separator so that you get back a high-purity liquid.
- the color system will be used again "Dry" compressed air blown out, so that it is heavily contaminated with paint residues Liquid is removed from the system.
- the compressed air throughput is preferably so high that that a turbulent gas flow forms in the color system.
- a particularly efficient removal of the liquid residues is achieved.
- blow out in the opposite direction perform so that the compressed air is fed into the return line and the liquid residues are blown out via the feed line.
- the applicator roller can be rotated, so that the surface of the applicator roller is thoroughly cleaned and after each Rinsing process is freed of liquid residues.
- the chamber doctor blade is usually used with the help of pneumatic cylinders with limited pressing force against the scope of the Application roller biased so that on the one hand an adequate seal the ink chamber is guaranteed, but on the other hand an excessive Wear on the doctor blades and seals that delimit the ink chamber is avoided.
- pneumatic cylinders with limited pressing force against the scope of the Application roller biased so that on the one hand an adequate seal the ink chamber is guaranteed, but on the other hand an excessive Wear on the doctor blades and seals that delimit the ink chamber is avoided.
- a considerable overpressure can develop in the ink chamber, because the downstream pipe system inevitably unites has a certain flow resistance. This overpressure in the ink chamber can cause the doctor blade against the force of the pneumatic cylinder is pushed away from the application roller.
- the doctor blade during of the blow-out process self-locking in their employed on the applicator roller Position is blocked, so that despite the prevailing in the ink chamber Overpressure remains attached to the circumference of the application roller.
- a suitable one Blocking device for the chamber doctor blade is the subject of the claim 6 and the claims dependent thereon.
- FIGs 1 and 2 is a side view and an end view, respectively an application roller 10 of a flexographic printing machine is shown.
- an application roller 10 of a flexographic printing machine is shown.
- a chamber doctor blade 12 adjustable the one Ink chamber 14 forms.
- the ink chamber 14 by doctor blade 16, 18 limited, which doctor the circumference of the rotating applicator roller 10.
- the applicator roller 10 is in turn on the circumference of a not shown Adjustable printing cylinder and gives the in the printing operation Ink chamber 14 received ink to the printing parts of the Clichés on the impression cylinder.
- a conveyor 20 is also shown schematically, which is used during printing to be diluted with solvent Ink continuously between the ink chamber 14 of the doctor blade and to circulate a paint container, not shown.
- Figure 1 shows the color system however during a cleaning process.
- the paint container replaced by a storage container 22, the used, so already contains cleaning fluid contaminated with printing ink to a certain degree.
- the conveyor 20 includes a feed line 24 which from the Storage container 22 leads to the ink chamber 14 and contains a feed pump 26, and one returning from the ink chamber 14 to the reservoir 22 Return line 28 with a return pump 30.
- the feed pump 26 and the return pump 30 are driven by compressed air Diaphragm pumps formed, which with compressed air lines 32, 34 Compressed air can be supplied from a compressed air source, not shown.
- an expansion tank 36 is connected, which in a known manner to compensate for pressure fluctuations serves the pulsating diaphragm pumps.
- the feed pump 26 is connected to the associated compressed air line 32 via a metering valve 38 connected to the adjustable delivery rate of this pump is.
- the delivery rate of the return pump 30 is correspondingly changeable with the aid of a metering valve 40.
- the supply line 24 and the return line are 28 still connected to the paint container, not shown.
- the supply line 24 is separated from the paint container, and the color still contained in the color chamber is over the Return line 28 conveyed into the paint container.
- there is one Pre-cleaning with used cleaning fluid e.g. with solvent, Water or soapy water.
- the supply line 24 and the return line 28 connected to the reservoir 22, as shown in Fig. 1 in dash-dotted lines.
- the cleaning fluid is in a closed circuit circulated so that the ink chamber 14 rinsed with the cleaning liquid becomes. Finally, the cleaning liquid is put back into the reservoir 22 is drained and the ink chamber is supplied via the supply line 24 ventilated.
- the paint system is blown through with compressed air.
- the supply line 24 is connected to the outlet of a valve 42 (dashed lines in Fig. 1).
- the valve 42 is with compressed air from the Compressed air line 32 is fed and preferably contains an adjustable throttle to control the air flow.
- the return line 28 is also separated from the storage container 22 and via a liquid separator 44 associated with the atmosphere.
- the pumps 26 and 30 each contain two permeable in the conveying direction Check valves that are in operation with the diaphragm pumps during pump operation open and close. During the blow-out process, the Flow of compressed air through these check valves is not impeded. The Compressed air therefore flows from the outlet of the valve 42 through the entire length the supply line 24, through the ink chamber 14 and through the entire length the return line 28 to the liquid separator 44. In this way the entire color system can be blown out thoroughly.
- the diaphragm pumps can continue to run, but they can also be switched off become. The liquid residues still contained in the color system are entrained by the compressed air and finally in the liquid separator 44 deposited.
- the required pressure of the compressed air depends on the flow resistance dependent on the color system and is typically in the On the order of 400 to 600 kPa (4 to 6 bar).
- a feed pump 46 connects the reservoir 22 or 22 'to the Outlet of the valve 42.
- the feed pump 46 When the feed pump 46 is in operation, thus Cleaning fluid fed into the compressed air flow and through the compressed air nebulized in the supply line 24.
- the color system instead of the color system during a rinsing process It is therefore also completely flooded with cleaning liquid possible to clean the cleaning system with a liquid mist that is reflected on the walls of the color system and then through the Compressed air is entrained to the liquid separator 44. In this way the color system can use a much lower amount of cleaning fluid to be cleaned.
- the supply of the cleaning liquid can possibly also self-priming according to the jet pump principle, so that under certain circumstances, the additional feed pump 46 can be dispensed with can.
- the cleaning liquid is directly at the outlet of the valve 42 is supplied, it is in modified embodiments also possible, the cleaning liquid or at least part of the same downstream of the feed pump 26 or only immediately before or in the Feed ink chamber 14.
- the color system is preferably used again blown out with compressed air, without supply of cleaning fluid, so that the refilling with printing ink no residues of cleaning liquid are more contained in the color system.
- FIG. 2 schematically shows one of two or more pneumatic cylinders 48 shown with which the doctor blade 12 against during the printing operation the scope of the application roller 10 is biased. If during the blowing process a relatively high pressure inside the ink chamber 14 prevails, acts on the relatively large floor area of the ink chamber 14 a force that has the tendency to counteract the doctor blade 12 Force the pneumatic cylinder 48 away from the applicator roller 10. This is in the embodiment shown by one or more blocking devices 50 prevented, which are assigned to the pneumatic cylinders 48.
- the piston rod 52 of the pneumatic cylinder 48 occurs on the chamber doctor 12 opposite side from the pneumatic cylinder and can with Locked mechanically in one position with the aid of the blocking device 50 be in which the doctor blades 16, 18 rest on the circumference of the applicator roller 10.
- the blocking device 50 has a guide 54 which is connected to the piston rod 52 forms an angle of approximately 80 ° and in which a slide 56 is guided is.
- Fig. 2 shows the blocking device in the unlocked state. In this The condition is a bore 58 of the slide 56 with the piston rod 52 aligned so that the free end of the piston rod 52 is not through the Slider 56 is supported. The chamber doctor blade is thus in this state 12 solely by the force of the pneumatic cylinder 48 with the applicator roller 10 kept in investment.
- the slide 56 has a support surface 60 adjacent to the bore 58, which is perpendicular to the piston rod 52 and consequently with the longitudinal axis the guide 54 forms an angle of approximately 10 °.
- a pneumatic actuating cylinder 62 is the slide 56 along the guide 54 between the unlocking position shown in FIG. 2 and one shown in FIG. 3 Locking position adjustable. Supports in the locked position the free end of the piston rod 52 on the support surface 60.
- the actuator cylinder 62 exerts an upward force in FIG. 3 on the slide 56 on, so that the piston rod 52 and the chambered doctor blade 12 by wedge action be pressed against the applicator roller 10.
Abstract
Description
- Figur 1
- zeigt eine schematische Darstellung des Farbsystems einer Druckmaschine; und
- Figuren 2 und 3
- zeigen schematische Stirnansichten einer Auftragwalze, einer Kammerrakel und einer Blockiereinrichtung in unterschiedlichen Betriebsstellungen.
Claims (10)
- Verfahren zum Reinigen des Farbsystems einer Druckmaschine mit einer Farbkammer (14), die durch eine an den Umfang einer Auftragwalze (10) anstellbare Kammerrakel (12) gebildet wird, dadurch gekennzeichnet, daß die Farbkammer (14) mit einem gasförmigen Druckmedium ausgeblasen wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß eine an die Farbkammer (14) angeschlossene Zufuhrleitung (24) und eine an die Farbkammer angeschlossene Rücklaufleitung (28) in einem Zuge mit der Farbkammer (14) ausgeblasen werden.
- Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß man das gasförmige Druckmedium auch durch eine in der Zufuhrleitung (24) und/oder der Rücklaufleitung (28) enthaltene Pumpe (26, 30) strömen läßt.
- Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß eine Reinigungsflüssigkeit mit Hilfe des gasförmigen Druckmediums in der Farbkammer (14) und/oder der Zulauf- oder Rücklaufleitung (24, 28) vernebelt wird.
- Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Kammerrakel (12) während des Ausblasvorgangs in einer an die Auftragwalze (10) angestellten Position blockiert wird.
- Vorrichtung zur Durchführung des Verfahrens nach Anspruch 5, gekennzeichnet durch eine Blockiereinrichtung (50) mit einer Führung (54), die schräg zu der Richtung verläuft, in der die Kammerrakel (12) relativ zur Auftragwalze (10) beweglich ist, und mit einem an der Führung (54) geführten und abgestützten Schieber (56), der längs der Führung zwischen einer Verriegelungsposition, in der er ein mit der Kammerrakel (12) verbundenes Bauteil (52) selbsthemmend abstützt, und einer Entriegelungsposition verstellbar ist, in der er das Bauteil (52) freigibt.
- Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß der Schieber (56) eine Stützfläche (60) aufweist, die mit der Führung (54) einen Winkel von weniger als etwa 30° bildet und an der sich das Bauteil (52) abstützt.
- Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß das mit der Kammerrakel (12) verbundene Bauteil (52) stabförmig ist und daß der Schieber (56) eine Bohrung (58) aufweist, die in der Stützfläche (60) mündet und in der Entriegelungsposition mit dem stabförmigen Bauteil (52) ausgerichtet ist.
- Vorrichtung nach einem der Ansprüche 6 bis 8, gekennzeichnet durch einen pneumatischen Stellzylinder (62) zum Verstellen des Schiebers (56) zwischen der Verriegelungsposition und der Entriegelungsposition.
- Vorrichtung nach einem der Ansprüche 6 bis 9, dadurch gekennzeichnet, daß ein Pneumatikzylinder (48) zum Anstellen der Kammerrakel (12) gegen die Auftragwalze (10) vorgesehen ist, und daß das durch den Schieber (56) abgestützte Bauteil das freie Ende einer Kolbenstange (52) des Pneumatikzylinders (48) ist.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE59802237T DE59802237D1 (de) | 1998-06-25 | 1998-06-25 | Verfahren und Vorrichtung zum Reinigen des Farbtransportsystems einer Druckmaschine |
ES98111701T ES2166122T3 (es) | 1998-06-25 | 1998-06-25 | Procedimiento y dispositivo para la limpieza del sistema de transporte de tinta de una maquina de imprimir. |
EP19980111701 EP0970810B1 (de) | 1998-06-25 | 1998-06-25 | Verfahren und Vorrichtung zum Reinigen des Farbtransportsystems einer Druckmaschine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19980111701 EP0970810B1 (de) | 1998-06-25 | 1998-06-25 | Verfahren und Vorrichtung zum Reinigen des Farbtransportsystems einer Druckmaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0970810A1 true EP0970810A1 (de) | 2000-01-12 |
EP0970810B1 EP0970810B1 (de) | 2001-11-28 |
Family
ID=8232172
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19980111701 Expired - Lifetime EP0970810B1 (de) | 1998-06-25 | 1998-06-25 | Verfahren und Vorrichtung zum Reinigen des Farbtransportsystems einer Druckmaschine |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0970810B1 (de) |
DE (1) | DE59802237D1 (de) |
ES (1) | ES2166122T3 (de) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6647880B2 (en) | 2000-10-13 | 2003-11-18 | Fischer & Krecke Gmbh & Co. | Flexographic printing press with device for washing the back-pressure cylinder |
WO2004071773A1 (de) * | 2003-02-15 | 2004-08-26 | Man Roland Druckmaschinen Ag | Waschvorrichtung für druck- und/oder beschichtungswerke in einer verarbeitungsmaschine |
DE10133349B4 (de) * | 2001-07-15 | 2006-04-06 | Harald Janzen | Vierkammer-Membranpumpe |
EP1762390A1 (de) * | 2005-09-13 | 2007-03-14 | Bobst S.A. | Anlage zur Farbwechslung in einer Druckeinheit einer Flexodruckmaschine |
CN103625110A (zh) * | 2013-11-21 | 2014-03-12 | 山东沃源新型面料股份有限公司 | 圆网印花机刮刀清洁装置 |
EP2497641A4 (de) * | 2009-11-05 | 2015-07-08 | Mitsubishi Heavy Ind Printing | Tintenreinigungsverfahren und vorrichtung für eine flexodruckmaschine |
EP2933103A1 (de) * | 2014-04-14 | 2015-10-21 | Mayr-Melnhof Karton AG | Verfahren zum Reinigen einer Farbauftragsvorrichtung und Farbauftragsvorrichtung |
EP2620285B1 (de) * | 2012-01-25 | 2019-11-13 | Bobst Bielefeld GmbH | Reinigungssystem für eine Tintenkammer |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0382347A2 (de) * | 1989-02-10 | 1990-08-16 | The Ward Machinery Company | Druckapparat mit einem doppelten Farbsystem |
EP0556460A1 (de) * | 1992-02-18 | 1993-08-25 | Paper Converting Machine Company | Druckapparat und Verfahren |
EP0607574A1 (de) * | 1992-12-30 | 1994-07-27 | Fit Group, Inc. | Farbkasten |
EP0612618A2 (de) * | 1993-02-25 | 1994-08-31 | DeMoore, Howard W. | Automatisches System zum Spenden eines Beschichtungs- und eines Reinigungsmittels für Druckmaschinen |
DE19516456A1 (de) * | 1995-05-04 | 1996-11-07 | Windmoeller & Hoelscher | Vorrichtung zur Reinigung einer Rakelvorrichtung für ein Spülfarbwerk einer Rotationsdruckmaschine |
EP0765749A1 (de) * | 1995-09-28 | 1997-04-02 | WindmÀ¶ller & Hölscher | Rakelvorrichtung für ein Spülfarbwerk einer Rotationsdruckmaschine |
-
1998
- 1998-06-25 EP EP19980111701 patent/EP0970810B1/de not_active Expired - Lifetime
- 1998-06-25 ES ES98111701T patent/ES2166122T3/es not_active Expired - Lifetime
- 1998-06-25 DE DE59802237T patent/DE59802237D1/de not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0382347A2 (de) * | 1989-02-10 | 1990-08-16 | The Ward Machinery Company | Druckapparat mit einem doppelten Farbsystem |
EP0556460A1 (de) * | 1992-02-18 | 1993-08-25 | Paper Converting Machine Company | Druckapparat und Verfahren |
EP0607574A1 (de) * | 1992-12-30 | 1994-07-27 | Fit Group, Inc. | Farbkasten |
EP0612618A2 (de) * | 1993-02-25 | 1994-08-31 | DeMoore, Howard W. | Automatisches System zum Spenden eines Beschichtungs- und eines Reinigungsmittels für Druckmaschinen |
DE19516456A1 (de) * | 1995-05-04 | 1996-11-07 | Windmoeller & Hoelscher | Vorrichtung zur Reinigung einer Rakelvorrichtung für ein Spülfarbwerk einer Rotationsdruckmaschine |
EP0765749A1 (de) * | 1995-09-28 | 1997-04-02 | WindmÀ¶ller & Hölscher | Rakelvorrichtung für ein Spülfarbwerk einer Rotationsdruckmaschine |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6647880B2 (en) | 2000-10-13 | 2003-11-18 | Fischer & Krecke Gmbh & Co. | Flexographic printing press with device for washing the back-pressure cylinder |
DE10133349B4 (de) * | 2001-07-15 | 2006-04-06 | Harald Janzen | Vierkammer-Membranpumpe |
WO2004071773A1 (de) * | 2003-02-15 | 2004-08-26 | Man Roland Druckmaschinen Ag | Waschvorrichtung für druck- und/oder beschichtungswerke in einer verarbeitungsmaschine |
CN100540306C (zh) * | 2003-02-15 | 2009-09-16 | 曼罗兰公司 | 用于加工纸机中的印刷和/或涂层装置的清洗系统 |
EP1762390A1 (de) * | 2005-09-13 | 2007-03-14 | Bobst S.A. | Anlage zur Farbwechslung in einer Druckeinheit einer Flexodruckmaschine |
WO2007031293A1 (fr) * | 2005-09-13 | 2007-03-22 | Bobst S.A. | Installation pour le changement de l'encre dans une station d'impression d'une imprimeuse flexographique |
US7677175B2 (en) | 2005-09-13 | 2010-03-16 | Bobst S.A. | Installation for changing ink in a printing station of a flexographic printer |
EP2497641A4 (de) * | 2009-11-05 | 2015-07-08 | Mitsubishi Heavy Ind Printing | Tintenreinigungsverfahren und vorrichtung für eine flexodruckmaschine |
EP2620285B1 (de) * | 2012-01-25 | 2019-11-13 | Bobst Bielefeld GmbH | Reinigungssystem für eine Tintenkammer |
CN103625110A (zh) * | 2013-11-21 | 2014-03-12 | 山东沃源新型面料股份有限公司 | 圆网印花机刮刀清洁装置 |
EP2933103A1 (de) * | 2014-04-14 | 2015-10-21 | Mayr-Melnhof Karton AG | Verfahren zum Reinigen einer Farbauftragsvorrichtung und Farbauftragsvorrichtung |
Also Published As
Publication number | Publication date |
---|---|
ES2166122T3 (es) | 2002-04-01 |
EP0970810B1 (de) | 2001-11-28 |
DE59802237D1 (de) | 2002-01-10 |
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