EP0441019B1 - System zum Waschen eines Gummituches mit einer Sprühvorrichtung - Google Patents

System zum Waschen eines Gummituches mit einer Sprühvorrichtung Download PDF

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Publication number
EP0441019B1
EP0441019B1 EP19900304588 EP90304588A EP0441019B1 EP 0441019 B1 EP0441019 B1 EP 0441019B1 EP 19900304588 EP19900304588 EP 19900304588 EP 90304588 A EP90304588 A EP 90304588A EP 0441019 B1 EP0441019 B1 EP 0441019B1
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EP
European Patent Office
Prior art keywords
solvent
water
spray bar
control means
air
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.)
Expired - Lifetime
Application number
EP19900304588
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English (en)
French (fr)
Other versions
EP0441019A1 (de
Inventor
Charles R C/O Baldwin Techn.Center Gasparrini
Carl Arnolds
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.)
Baldwin Technology Corp
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Baldwin Technology Corp
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 Baldwin Technology Corp filed Critical Baldwin Technology Corp
Publication of EP0441019A1 publication Critical patent/EP0441019A1/de
Application granted granted Critical
Publication of EP0441019B1 publication Critical patent/EP0441019B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F35/00—Cleaning arrangements or devices
    • B41F35/06—Cleaning arrangements or devices for offset cylinders
    • 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
    • B41P2235/26—Spraying devices
    • 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
    • B41P2235/30—Recovering used solvents or residues
    • B41P2235/31—Recovering used solvents or residues by filtering

Definitions

  • This invention relates to cleaning apparatus for printing presses and, in particular, to systems for automatically washing blanket cylinders in offset printing presses.
  • the hand wash method utilizes manual application of wash fluid by the press crew when the press is stopped. In this method, hand towels are soaked and the blankets physically scrubbed clean of debris. Manual washing of the blanket while the press is operating is also utilized. A member of the press crew will clean a specific area of a blanket that is causing print quality to deteriorate. While this technique extends productivity, it is very unsafe because of the high peripheral speed of the blanket cylinder.
  • Cloth type systems described in U.S. Patents Nos. 4,344,361 and 4,757,763, utilize a disposable cloth that passes over an inflatable pressure pad. The cloth is wetted with wash fluid pressed against the blanket and the cloth is advanced in increments to affect cleaning.
  • Brush type systems utilize a rotating brush that is pressed against the blanket.
  • the brush may be wetted with solvent prior to coming in contact with the blanket. Debris that is removed from the blanket to the brush is gathered in a used solvent collection system. Typically the solvent undergoes separation and treatment to remove the debris and collect the solvent.
  • Spray type systems utilize a spray bar positioned near the blankets.
  • the spray bar sprays wash fluid onto the blanket cylinders.
  • Previously known spray bars as in U.S. Patent No. 4,686,902, premix solvent and water in a tank to form an effective emulsified solution. This is undesirable because once the wash solvent is mixed, the ratio of solvent to water in the solution cannot be changed unless the system is drained and flushed and a new ratio established. Additionally, the mixture must be continually circulated or agitated to maintain the emulsification.
  • the present invention avoids the need for mixing water and solvent in a tank or premixer and avoids the need for recirculation or agitation of the wash solvent, thus allowing continual change in the emulsified solution as desired without requiring that the system be drained and flushed.
  • the amount of wash fluid sprayed by the spray bar is controlled and limited to the volume of the internal cavity of the spray bar.
  • the system works in cycles, where one cycle consists of completely filling the internal cavity of the spray bar with wash fluid followed by activating the air for spraying.
  • the present invention avoids this cyclic action by providing a means for the wash fluid to be continuously ejected from the spray bar as it enters the spray bar.
  • the present invention also provides for individually settable water and solvent amounts which are not limited to the volume of the internal cavity of the spray bar.
  • spray blanket wash system for applying a mixture of solvent and water to a blanket cylinder of a printing press unit, characterised by a mixing tube in which water and solvent dispensed by water control means and solvent control means are continually mixed during their passage to the nozzles of the spray bar, and also characterised by central control means coupled to the solvent, water and an air control means, operative to select specific ratios of solvent and water to be delivered to the mixing tube, the dispensed solvent and water being continually mixed in the duct and delivered to the nozzles of the spray bar means by the dispensed air, for a duration determined by the central control means.
  • the washing fluid is continually mixed in the mixing tube and can be supplied on a continuous basis, for a time determined by the central control means, rather than being limited by the volume of the internal cavity of the spray bar.
  • a fluid control system consisting of two main components; an air box 2 and fluid boxes 4. Each press unit is equipped with one air box 2 and two fluid boxes 4 which control the necessary fluids and air to the spray systems.
  • a center feed spray system is shown in Figure 2 and an end feed spray system is shown is Figure 3.
  • the fluid control system regulates solvent, water and air to the spray systems in specific quantities and at specific pressures as directed by a control element 28.
  • the air box 2 provides regulated air pressure as required for system function. Compressed air enters the air box 2 through line 6 and is supplied to an air valve manifold 5. The air then flows through air filters 11, fluid spray regulators 10 and fluid spray valves 12. When the fluid spray valves are actuated by the control element 28, the regulated air flows out of the air box 2 to the corresponding fluid box 4. It then flows past an air check valve 50, enters a fluid manifold 14 and flows into a mixing tube 21. The air then ejects the mixed solvent and water from the mixing tube 21 into a spray bar 30 ( Figures 2 and 3).
  • Pressurized solvent is delivered from a solvent supply 16 through line 8, past a solvent regulator 15, to a solvent manifold inlet 18.
  • the solvent then passes through a solvent filter 23 to a solvent valve 20.
  • the solvent valve 20 is actuated by the control element 28, the solvent enters the fluid manifold 14 and then flows into the mixing tube 21.
  • Flow control means such as a solvent orifice 40 and a solvent check valve 51, are interposed between the solvent valve 20 and the fluid manifold 14.
  • Pressurized water is delivered from a water supply 22 through line 9, past a water regulator 42, to a water manifold 24. Water then passes through a water filter 44 to a water valve 26. When the water valve 26 is actuated by the control element 28, water enters the fluid manifold 14 and then flows into the mixing tube 21.
  • Flow control means such as a water orifice 48 and a water check valve 52, are interposed between the water valve 26 and the fluid manifold 14. The water and solvent valves can be actuated either simultaneously or sequentially by the control element 28.
  • the mixing tube 21 can center feed the spray bar 30 as in Figure 2 or end feed the spray bar 30 as in Figure 3.
  • the water and solvent mixture is ejected by air pressure through the mixing tube 21 into the spray bar 30.
  • the mixed wash fluid is then ejected as sprayed fluid through nozzles 32 in the spray bar 30.
  • This point of use mixing eliminates the need to keep the two fluids constantly moving.
  • the point of use mixing also eliminates prefilling the spray bar, since the wash fluid flows through the spray bar and is ejected from the spray bar simultaneously.
  • the nozzles 32 on the spray bar 30 are purged after use by the air pressure to prevent blockage.
  • the spray bar 30 is normally positioned adjacent the blanket cylinder 36 on the infeed side of the press unit.
  • the spray bar 30 has a plurality of nozzles 32, preferably eight or more and most preferably fifteen or more.
  • the plurality of nozzles 32 permits the positioning of the spray bar 30 close to the blanket cylinder while maintaining spray fan overlap. Placing the spray bar 30 close to the blanket diminishes the amount of solvent lost to mist in the atmosphere in the press room and reduces the amount of solvent required.
  • the spray bar 30 includes an internal cavity 38 connected to the plurality of nozzles 32.
  • the internal cavity is dimensioned such that the pressurised wash mixture is dispenses approximately equally from the plurality of nozzles.
  • the internal cavity 38 would have a diameter of about 0.32-0.47 cm (one-eight to about three-sixteenths of an inch) when using 1.72 - 3.10 bar (25 to 45 pounds per square inch) supply pressure.
  • the control element 28 may control the wash cycle for one or more press units.
  • the control element can be operated in an automatic or manual mode.
  • the automatic mode is used for automatic washing of the press blankets.
  • the programs employed by the control element regulate at least the ratio of solvent water used, the pressure of the spray and the duration of the spray.
  • the control element also provides for prewetting of blankets during start-up. With more than one press unit, the control system provides for simultaneous or sequential washing of the blankets.
  • the described embodiment of the present invention provides an improved spray system for cleaning blanket cylinders during the course of a press run without interrupting press operation or causing excessive waste during the run. This permits a sharper reproduction for a printed product and incurs less down-time. It also permits the use of grades of paper stock having higher lint contents.
  • the amount of water and solvent can be individually set and the system can wash all press units simultaneously or sequentially as selected by suitable control programs.
  • the prewetting feature precludes web breaks during start-up. The balanced wetting of the web avoids the problem that if the right side of the cylinder is wet before the left side of the cylinder, the web could wander laterally or be subject to uneven tension and break.
  • the frequency of the automatic actuation and operation of the spray system is adjustable by a press operator in response to various anticipated or observed operating parameters such as the length of the press run and the lint content of the paper stock.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Claims (9)

  1. Sprüh-Drucktuchwaschsystem, um eine Mischung aus Lösungsmittel und Wasser auf einen Drucktuch-Zylinder einer Druckpresse-Einheit aufzubringen, wobei das System folgendes aufweist:
    (a) eine Lösungsmittelzuführeinrichtung (16, 8);
    (b) eine Wasserzuführeinrichtung (22, 42, 9);
    (c) eine Luftzuführeinrichtung (6, 2);
    (d) eine Sprühstangeneinrichtung (30, 32, 38), um von den Zuführeinrichtungen Lösungsmittel und Wasser aufzunehmen und zu verteilen, wobei die Sprühstange eine Mehrzahl von Düsen (32) aufweist, um das Lösungsmittel und das Wasser auf die Drucktuch-Zylinder zu sprühen;
    (e) eine Lösungsmittel-Steuereinrichtung, die mit der Lösungsmittelzuführeinrichtung verbunden ist und eine Ventileinrichtung (20) zum gesteuerten Abgeben des von der Zuführeinrichtung (16,8) kommenden und von der Sprühstangeneinrichtung zu versprühenden Lösungsmittels aufweist;
    (f) eine Wasser-Steuereinrichtung, die mit der Wasserzuführeinrichtung verbunden ist und eine Ventileinrichtung (26) zum gesteuerten Abgeben des von der Wasserzuführeinrichtung (22, 42, 9) kommenden und von der Sprühstangeneinrichtung zu versprühenden Wassers; und
    (g) eine Luft-Steuereinrichtung, die mit der Luftzuführeinrichtung verbunden ist und eine Ventileinrichung (12) zum gesteuerten Abgeben der Luft aufweist, die durch die Sprühstangeneinrichtung hindurchtreten soll;
    (h) ein Mischrohr (21), in dem das Wasser und das Lösungsmittel, die von der Wasser-Steuereinrichtung (26) und der Lösungsmittel-Steuereinrichtung (20) abgegeben wurden, auf ihrem Weg zu den Düsen (32) der Sprühstangeneinrichtung ständig vermischt werden; und
    (i) eine Zentralsteuereinrichtung (28), die mit den Lösungsmittel-, Wasser- und Luft-Steuereinrichtungen (20, 26, 12) verbunden ist und die die Ventileinrichtung öffnet, um bestimmte Lösungsmittel-Wasser-Mischungsverhältnisse auszuwählen, die dem Mischrohr zugeführt werden sollen, wobei das abgegebene Lösungsmittel und das abgegebene Wasser in dem Rohr ständig vermischt und durch die abgegebene Luft zu den Düsen der Sprühstangeneinrichtung transportiert werden, und zwar für einen Zeitraum, der durch das Öffnen der Ventileinrichtung durch die Zentralsteuereinrichtung bestimmt wird.
  2. System nach Anspruch 1, bei dem das Mischrohr (21) mittig in die Sprühstange (30, 38) hineinführt.
  3. System nach Anspruch 1, bei dem das Ende des Mischrohrs (21) in die Sprühstange (30, 38) hineinführt.
  4. System nach einem der vorhergehenden Ansprüche, bei dem die Mehrzahl von Düsen (32) aus acht oder mehr Düsen auf der Sprühstange (30) besteht.
  5. System nach einem der vorhergehenden Ansprüche, das in einer Druckpresse installiert ist, wobei der Abstand der Sprühstange zum Zylinderdrucktuch 2,54 cm bis 10,16 cm (1 bis 4 Inch) beträgt.
  6. System nach einem der vorhergehenden Ansprüche, das in einer Presse installiert ist, wobei die Zentralsteuereinrichtung (28) die Wasser-, Lösungsmittel- und Luft-Steuereinrichtungen während der Anlaufphase des Drucktuch-Zylinders aktiviert, um den Drucktuch-Zylinder vorab anzufeuchten.
  7. System nach einem der vorhergehenden Ansprüche, das in einer Presse mit einer Mehrzahl von Drucktuch-Zylindern installiert ist, wobei die Zentralsteuereinrichtung (28) die Wasser-, Lösungsmittel- und Luft-Steuereinrichtungen (20, 26, 12) aktiviert, um die Drucktuchzylinder gleichzeitig oder nacheinander zu waschen.
  8. System nach einem der vorhergehenden Ansprüche, das in einer Presse installiert ist, wobei die Zentralsteuereinrichtung (28) die Luft-Steuereinrichtung aktiviert, um für einen Zeitraum unmittelbar nach dem Waschen des oder jedes Drucktuchzylinders Luft durch die Düsen (32) abzugeben.
  9. System nach einem der vorhergehenden Ansprüche, bei dem die Sprühstangeneinrichtung (30) einen inneren Hohlraum (48) aufweist, der so bemessen ist, daß das unter Druck stehende Waschgemisch aus Lösungsmittel und Wasser von der Mehrzahl der Düsen ungefähr gleich abgegeben wird.
EP19900304588 1990-02-06 1990-04-27 System zum Waschen eines Gummituches mit einer Sprühvorrichtung Expired - Lifetime EP0441019B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US47498390A 1990-02-06 1990-02-06
US474983 1990-02-06

Publications (2)

Publication Number Publication Date
EP0441019A1 EP0441019A1 (de) 1991-08-14
EP0441019B1 true EP0441019B1 (de) 1995-07-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900304588 Expired - Lifetime EP0441019B1 (de) 1990-02-06 1990-04-27 System zum Waschen eines Gummituches mit einer Sprühvorrichtung

Country Status (4)

Country Link
EP (1) EP0441019B1 (de)
JP (1) JP3043380B2 (de)
CN (1) CN1025169C (de)
DE (1) DE69020882T2 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004011860A1 (de) * 2004-03-11 2005-09-29 Koenig & Bauer Ag Reinigungsvorrichtung
DE102008042741A1 (de) 2008-10-10 2010-04-15 Koenig & Bauer Aktiengesellschaft Reinigungsvorrichtung für einen Zylinder oder eine Walze einer Druckmaschine

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5259313A (en) * 1991-12-20 1993-11-09 Heidelberg Harris Gmbh Method and apparatus for cleaning an inking mechanism and/or a printing mechanism in printing units of rotary printing machines
JPH085183B2 (ja) * 1992-01-22 1996-01-24 芳村電設株式会社 ブラシロール全自動洗浄・水切り処理装置
DE4216389A1 (de) * 1992-05-18 1993-11-25 Baldwin Gegenheimer Gmbh Druckwerks-Waschvorrichtung für Druckmaschinen
DE4216423A1 (de) * 1992-05-18 1993-11-25 Baldwin Gegenheimer Gmbh Druckwerks-Waschvorrichtung für Druckmaschinen
DE4230056A1 (de) * 1992-09-08 1994-03-10 Man Nutzfahrzeuge Ag Zerstäubereinrichtung
DE4443357C2 (de) * 1994-12-06 1998-05-14 Roland Man Druckmasch Verfahren und Anordnung zur Reinigung eines Zylinders einer Rotationsdruckmaschine
IT1321267B1 (it) * 2000-05-19 2004-01-08 Marco Corti Metodo e dispositivo per la pulitura dei cilindri in caucciu' dellemacchine da stampa, particolarmente del tipo cosiddette a bobina.
IT1321266B1 (it) * 2000-05-19 2004-01-08 Marco Corti Metodo e dispositivo a spazzola rotante per la pulizia dei cilindridelle macchine da stampa.
DE10154430B4 (de) * 2001-11-06 2009-04-02 Manroland Ag Verfahren und Vorrichtung zum Löschen eines Druckbildes auf einer Druckform für eine Druckmaschine
DE202004001174U1 (de) * 2004-01-27 2004-04-08 Man Roland Druckmaschinen Ag Versorgungseinrichtung für eine Reinigungsvorrichtung in einer Verarbeitungsmaschine
DE102004011861A1 (de) * 2004-03-11 2005-09-29 Koenig & Bauer Ag Reinigungsvorrichtung
DE102004011859A1 (de) * 2004-03-11 2005-09-29 Koenig & Bauer Ag Reinigungsvorrichtung für einen Zylinder oder eine Walze
DE102006015831A1 (de) * 2006-04-03 2007-10-11 Technotrans Ag Waschvorrichtung für eine Offset-Druckmaschine
DE102007060854A1 (de) * 2007-12-18 2009-06-25 BSH Bosch und Siemens Hausgeräte GmbH Reinigungsvorrichtung für ein mit Flusen beladenes Bauteil in einem Hausgerät sowie Hausgerät und Verfahren zum Reinigen eines mit Flusen beladenen Bauteils
CN102151627B (zh) * 2011-04-01 2012-12-19 上海大学 用于双流体喷射器的液体控制系统
CN102896894B (zh) * 2012-10-15 2015-08-12 北京印刷学院 一种用于橡皮滚筒清洗装置的喷洒机构
AU2013200610B1 (en) * 2013-02-05 2014-02-27 Ecochem Australia Pty Ltd System and method for automatically cleaning converters
CN103568558A (zh) * 2013-10-21 2014-02-12 安徽华印机电股份有限公司 一种胶印机滚筒的清洁装置
CN112208207A (zh) * 2020-11-03 2021-01-12 北京嘉鸿汇众技术有限公司 一种用于印刷机清洗压印装置的转接装置
CN112793302A (zh) * 2021-01-29 2021-05-14 北京嘉鸿汇众技术有限公司 一种印刷机压印清洗转接箱
CN113635672A (zh) * 2021-04-01 2021-11-12 北京嘉鸿汇众技术有限公司 橡皮布自动清洗装置

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US3139028A (en) * 1962-04-03 1964-06-30 Advanced Graphics Inc Misting apparatus for treating printing plates
US3486448A (en) * 1967-04-27 1969-12-30 Web Press Eng Inc Automatic blanket cylinder washer
US3508711A (en) * 1967-12-29 1970-04-28 Ryco Graphic Mfg Fluid dispensing system
JPS5739059B2 (de) * 1972-04-28 1982-08-19
JPS52116307A (en) * 1976-03-24 1977-09-29 Masaharu Fukushima Damping water feeder for printing press
DE2826135C2 (de) * 1978-06-15 1982-11-18 Baldwin-Gegenheimer GmbH, 8900 Augsburg Gummituch-Waschvorrichtung
US4757763A (en) * 1979-04-19 1988-07-19 Baldwin Technology Corporation Automatic blanket cylinder cleaner
FR2569611A1 (fr) * 1984-09-05 1986-03-07 Assant Joel Dispositif applicable aux machines d'impression offset notamment pour le mouillage et/ou l'encrage
DE3507210A1 (de) * 1985-03-01 1986-09-04 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Waschvorrichtung fuer das gummituch an offset-rotationsdruckmaschinen
JPH0246388B2 (ja) * 1987-06-30 1990-10-15 Baldwin Gegenheimer Gmbh Insatsukinogomuburanketsutosenjosochi
EP0335967B1 (de) * 1987-08-17 1992-01-15 Precision Engineered Systems Inc. Automatisches gummituchwaschsystem mit strömung durch eine zerstäuberstange

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004011860A1 (de) * 2004-03-11 2005-09-29 Koenig & Bauer Ag Reinigungsvorrichtung
DE102008042741A1 (de) 2008-10-10 2010-04-15 Koenig & Bauer Aktiengesellschaft Reinigungsvorrichtung für einen Zylinder oder eine Walze einer Druckmaschine
DE102008042741B4 (de) * 2008-10-10 2016-07-28 Koenig & Bauer Ag Reinigungsvorrichtung für einen Zylinder oder eine Walze einer Druckmaschine

Also Published As

Publication number Publication date
EP0441019A1 (de) 1991-08-14
JPH03239548A (ja) 1991-10-25
JP3043380B2 (ja) 2000-05-22
DE69020882T2 (de) 1996-03-21
CN1053904A (zh) 1991-08-21
DE69020882D1 (de) 1995-08-17
CN1025169C (zh) 1994-06-29

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