EP1591244B1 - Method and means for cleaning the dampening solution of a printing press - Google Patents

Method and means for cleaning the dampening solution of a printing press Download PDF

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Publication number
EP1591244B1
EP1591244B1 EP05009231A EP05009231A EP1591244B1 EP 1591244 B1 EP1591244 B1 EP 1591244B1 EP 05009231 A EP05009231 A EP 05009231A EP 05009231 A EP05009231 A EP 05009231A EP 1591244 B1 EP1591244 B1 EP 1591244B1
Authority
EP
European Patent Office
Prior art keywords
fountain solution
dirt
dampening solution
overflow
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.)
Not-in-force
Application number
EP05009231A
Other languages
German (de)
French (fr)
Other versions
EP1591244A2 (en
EP1591244A3 (en
Inventor
Christian Walczyk
Christian Brüggemann
Jürgen Meckel
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
GEA Mechanical Equipment GmbH
Original Assignee
Technotrans SE
Westfalia Separator GmbH
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, Westfalia Separator GmbH filed Critical Technotrans SE
Publication of EP1591244A2 publication Critical patent/EP1591244A2/en
Publication of EP1591244A3 publication Critical patent/EP1591244A3/en
Application granted granted Critical
Publication of EP1591244B1 publication Critical patent/EP1591244B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B41F7/32—Ducts, containers, or like supply devices for liquids
    • 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

Definitions

  • the invention relates to a method for cleaning the dampening solution of a printing machine with an automatically emptying separator, which separates the dirt particles and oil residues from the dampening solution and as a dirt and dampening solution a dirt and dampening supplies and introduces the remaining dampening solution in a fountain solution
  • a fountain solution is used in offset printing to moisten the rollers during recording and transfer of printing ink.
  • the dampening solution consists mostly of water with an addition of alcohol and other additives.
  • the dampening solution is exposed to increasing contamination during the printing process by absorbing paint residues, dust, etc.
  • a reuse of dampening solution is sought, since in this way the water consumption and the cost of the additives and on the other hand, the disposal costs can be limited.
  • dampening systems are operated in the circulation.
  • the dampening solution is filtered after use or subjected to other cleaning processes and then returned to a dampening solution tank. In this case, the mixing ratio between water and additives can be readjusted.
  • a cleaning of the dampening solution by a centrifugal separator, in which separate the dirt particles from the dampening solution. Separators of this type are also available as embodiments with automatic draining (see DE 199 55 624 A1 ).
  • DE 297 23 682 discloses a device for cleaning the dampening solution of a printing press, with a dirt and dampening solution container and a dampening agent, wherein the dirt and dampening agent mixture is supplied to the dirt and dampening solution and the remaining dampening solution is introduced into a dampening solution, the dirt and dampening solution container is with the dampening solution collecting container connected by an overflow, which emanates from the dampening agent contained layer of the dirt and dampening solution tank.
  • An intensification of the cleaning process could be achieved by means of filters which are frequently used in practice. Filters are used in the form of filter mats, band filters, filter bags, etc.
  • the invention has for its object to provide a method and apparatus of the above type, which allow to achieve without the use of filter materials a high degree of separation of dampening solution and dirt particles.
  • the method according to the invention is characterized in that the soil and dampening solution mixture is brought into the dirt and dampening solution for stratified sedimentation and that the layer containing the dampening solution is transferred by an overflow in the dampening solution collection.
  • the dirt particles Due to different density ratios, the dirt particles generally settle down in the smut and fountain solution container, while oil residues form the upper layer and the still usable dampening agent forms the middle layer. It is therefore possible by suitable arrangement of an overflow to remove the middle layer and thus separate it from the lower dirt particle layer and the upper oil layer. If the layers are distributed differently, the overflow should be used differently.
  • a height-adjustable weir is provided above and possibly also below, which is adjustable so that the dirt particles located underneath and the above-floating oil residues are retained.
  • a device is characterized in that the dirt and dampening solution container is connected to the dampening solution collecting container by an overflow, which emanates from the moisture-containing layer of the dirt and dampening solution container.
  • the weir emerging from the top can be height adjustable. It is also possible to provide a liftable from below, adjustable weir.
  • the single FIGURE is a schematic circuit diagram for explaining the sequence of the method according to the invention.
  • 10 denotes a dampening solution tank. From this fountain solution tank 10 is transported in a manner not shown dampening solution to the associated printing unit of the printing press and returned used dampening solution. These details are not shown. Regardless, is drawn from the dampening solution tank 10 via a line 12 by means of a pump 14 fountain solution and fed to a centrifugal separator 16. This separator is self-draining. It serves for a substantial separation of dampening solution and dirt particles. The separator therefore discharges largely purified dampening solution into a dampening agent collecting container 20 via a line 18. On the other hand, a dirt particle / dampening solution mixture is discharged from the separator 16 via a line 22 into a dirt and fountain solution container 24.
  • the dirt and dampening solution tank 24 is connected to the fountain solution tank 20 through an overflow 26, which is shown only schematically in the drawing.
  • the overflow 26 starts from the central region of the dirt and dampening solution tank 24, so that in the dirt and dampening tank 24 dirt particles fall down and oil residue can float upwards, while at a moderate level largely pure dampening solution is available.
  • This fountain solution layer can be removed via the medium height overflow 26. It can protrude from above and possibly also from below a weir in the overflow. These weirs can be adjustable in the vertical direction so that they only pass through the layer, which essentially consists of pure dampening solution, like a diaphragm.
  • a line 28 in which a pump 30 is located. Via the line 28, the purified dampening solution can be pumped from the fountain solution tank 20 back into the dampening solution tank 10.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)
  • Treatment Of Sludge (AREA)

Description

Die Erfindung betrifft ein Verfahren zur Reinigung des Feuchtmittels einer Druckmaschine mit einem automatisch entleerenden Separator, der die Schmutzpartikel und Ölreste vom Feuchtmittel abtrennt und als Schmutz-und Feuchtmittelgemisch einem Schmutz- und Feuchmittelbehälter zuführt und das verbleibende Feuchtmittel in einen Feuchtmittelsammelbehälter einleitetThe invention relates to a method for cleaning the dampening solution of a printing machine with an automatically emptying separator, which separates the dirt particles and oil residues from the dampening solution and as a dirt and dampening solution a dirt and dampening supplies and introduces the remaining dampening solution in a fountain solution

Ein Feuchtmittel dient beim Offset-Druck zum Anfeuchten der Walzen bei der Aufnahme und der Übertragung von Druckfarbe. Das Feuchtmittel besteht zumeist im wesentlichen aus Wasser mit einem Zusatz von Alkohol und weiteren Zusätzen. Das Feuchtmittel ist während des Druckvorgangs durch Aufnahme von Farbresten, Staub, etc. einer zunehmenden Verschmutzung ausgesetzt. Auf der anderen Seite wird eine Wiederverwendung des Feuchtmittels angestrebt, da sich auf diese Weise der Wasserverbrauch und die Kosten für die Zusatzmittel sowie andererseits die Entsorgungskosten in Grenzen halten lassen. In vielen Fällen werden daher Feuchtmittelsysteme im Kreislauf betrieben. Zumeist wird das Feuchtmittel nach dem Gebrauch gefiltert oder anderen Reinigungsvorgängen unterworfen und sodann in einen Feuchtmitteltank zurückgeführt. Dabei kann auch das Mischungsverhältnis zwischen Wasser und Zusatzstoffen neu justiert werden. Bekannt ist auch eine Reinigung des Feuchtmittels durch einen Zentrifugal-Separator, in dem sich die Schmutzpartikel vom Feuchtmittel abtrennen. Separatoren dieser Art gibt es auch als Ausführungsformen mit selbsttätiger Entleerung (siehe DE 199 55 624 A1 ).A fountain solution is used in offset printing to moisten the rollers during recording and transfer of printing ink. The dampening solution consists mostly of water with an addition of alcohol and other additives. The dampening solution is exposed to increasing contamination during the printing process by absorbing paint residues, dust, etc. On the other hand, a reuse of dampening solution is sought, since in this way the water consumption and the cost of the additives and on the other hand, the disposal costs can be limited. In many cases, therefore dampening systems are operated in the circulation. In most cases, the dampening solution is filtered after use or subjected to other cleaning processes and then returned to a dampening solution tank. In this case, the mixing ratio between water and additives can be readjusted. Also known is a cleaning of the dampening solution by a centrifugal separator, in which separate the dirt particles from the dampening solution. Separators of this type are also available as embodiments with automatic draining (see DE 199 55 624 A1 ).

DE 297 23 682 offenbart eine Vorrichtung zur Reinigung des Feuchtmittels einer Druckmaschine, mit einem Schmutz- und Feuchtmittelbehälter und einem Feuchtmittelsammelbehälter, wobei das Schmutz- und Feuchtmittelgemisch dem Schmutz- und Feuchtmittelbehälter zugeführt wird und das verbleibende Feuchtmittel in einen Feuchtmittelsammelbehälter eingeleitet wird, der Schmutz- und Feuchtmittelbehälter ist mit dem Feuchtmittelsammelbehälter durch einen Überlauf verbunden, der von der das Feuchtmittel enthaltene Schicht des Schmutz- und Feuchtmittelbehälters ausgeht. DE 297 23 682 discloses a device for cleaning the dampening solution of a printing press, with a dirt and dampening solution container and a dampening agent, wherein the dirt and dampening agent mixture is supplied to the dirt and dampening solution and the remaining dampening solution is introduced into a dampening solution, the dirt and dampening solution container is with the dampening solution collecting container connected by an overflow, which emanates from the dampening agent contained layer of the dirt and dampening solution tank.

Die Abtrennung des Feuchtmittel-Schmutzpartikel-Gemisches im Separator bewirkt naturgemäß, dass dieses Gemisch nach wie vor einen relativ hohen Anteil von an sich verwertbarem Feuchtmittel enthält.The separation of the dampening solution-dirt particle mixture in the separator naturally causes that this mixture still contains a relatively high proportion of usable wetting agent per se.

Eine Intensivierung des Reinigungsvorgangs ließe sich mithilfe von Filtern erreichen, die in der Praxis häufig verwendet werden. Filter werden in der Form von Filtermatten, Bandfiltern, Filterbeuteln usw. eingesetzt.An intensification of the cleaning process could be achieved by means of filters which are frequently used in practice. Filters are used in the form of filter mats, band filters, filter bags, etc.

Diese Filtermaterialien stellen Verbrauchsmaterialien dar und sind sowohl durch die Beschaffung als auch durch die spätere Entsorgung mit Kosten verbunden. Dies gilt insbesondere auch für die Notwendigkeit, dass die Filtermaterialien regelmäßig durch Personaleinsatz gewechselt werden müssen.These filter materials are consumables and are costly both through procurement and later disposal. This is especially true for the need for the filter materials must be changed regularly by staffing.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung der obigen Art zu schaffen, die es gestatten, ohne Verwendung von Filtermaterialien einen hohen Grad der Trennung von Feuchtmittel und Schmutzpartikeln zu erreichen.The invention has for its object to provide a method and apparatus of the above type, which allow to achieve without the use of filter materials a high degree of separation of dampening solution and dirt particles.

Zur Lösung dieser Aufgabe ist das erfindungsgemäße Verfahren dadurch gekennzeichnet, dass das Schmutz- und Feuchtmittelgemisch in dem Schmutz-und Feuchtmittelbehälter zum schichtweisen Absetzen gebracht wird und dass die das Feuchtmittel enthaltende Schicht durch einen Überlauf in den Feuchtmittelsammelbehälter überführt wird.To solve this problem, the method according to the invention is characterized in that the soil and dampening solution mixture is brought into the dirt and dampening solution for stratified sedimentation and that the layer containing the dampening solution is transferred by an overflow in the dampening solution collection.

Aufgrund unterschiedlicher Dichteverhältnisse setzen sich in dem Schmut-und Feuchtmittelbehälter in der Regel unten die Schmutzpartikel ab, während Ölreste die obere Schicht bilden und das noch brauchbare Feuchtmittel die mittlere Schicht bildet. Man kann daher durch geeignete Anordnung eines Überlauf die mittlere Schicht abziehen und damit von der unteren Schmutzpartikelschicht und der oberen Ölschicht trennen. Bei einer anderen Verteilung der Schichten ist der Überlauf entsprechend anders einzusetzen.Due to different density ratios, the dirt particles generally settle down in the smut and fountain solution container, while oil residues form the upper layer and the still usable dampening agent forms the middle layer. It is therefore possible by suitable arrangement of an overflow to remove the middle layer and thus separate it from the lower dirt particle layer and the upper oil layer. If the layers are distributed differently, the overflow should be used differently.

Vorzugsweise ist oben und gegebenenfalls auch unten ein höhenverstellbares Wehr vorgesehen, das so einstellbar ist, dass die unten befindlichen Schmutzpartikel und die oben schwimmenden Ölreste zurückgehalten werden.Preferably, a height-adjustable weir is provided above and possibly also below, which is adjustable so that the dirt particles located underneath and the above-floating oil residues are retained.

Eine erfindungsgemäße Vorrichtung ist dadurch gekennzeichnet, dass der Schmutz- und Feuchtmittelbehälter mit dem Feuchtmittelsammelbehälter durch einen Überlauf verbunden ist, der von der das Feuchtmittel enthaltenden Schicht des Schmutz- und Feuchtmittelbehälters ausgeht. Das von oben auftauchende Wehr kann höhenverstellbar sein. Es ist auch möglich, ein von unten anhebbares, verstellbares Wehr vorzusehen.A device according to the invention is characterized in that the dirt and dampening solution container is connected to the dampening solution collecting container by an overflow, which emanates from the moisture-containing layer of the dirt and dampening solution container. The weir emerging from the top can be height adjustable. It is also possible to provide a liftable from below, adjustable weir.

Im folgenden werden bevorzugte Ausführungsbeispiele der Erfindung anhand der beigefügten Zeichnung näher erläutert.In the following preferred embodiments of the invention will be described with reference to the accompanying drawings.

Die einzige Figur ist ein schematisches Schaltbild zur Erläuterung des Ablaufs des erfindungsgemäßen Verfahrens.The single FIGURE is a schematic circuit diagram for explaining the sequence of the method according to the invention.

In der Zeichnung ist mit 10 ein Feuchtmitteltank bezeichnet. Von diesem Feuchtmitteltank 10 aus wird in nicht gezeigter Weise Feuchtmittel zu dem zugehörigen Druckwerk der Druckmaschine transportiert und gebrauchtes Feuchtmittel zurückgeleitet. Diese Einzelheiten sind nicht dargestellt. Unabhängig davon wird von dem Feuchtmitteltank 10 über eine Leitung 12 mithilfe einer Pumpe 14 Feuchtmittel abgezogen und einem Zentrifugal-Separator 16 zugeleitet. Dieser Separator wirkt selbstentleerend. Er dient zu einer weitgehenden Trennung von Feuchtmittel und Schmutzpartikeln. Der Separator gibt daher über eine Leitung 18 weitgehend gereinigtes Feuchtmittel in einen Feuchtmittelsammelbehälter 20 ab. Andererseits wird von dem Separator 16 ein Schmutzpartikel-Feuchtmittelgemisch über eine Leitung 22 in einen Schmutz- und Feuchtmittelbehälter 24 abgegeben.In the drawing, 10 denotes a dampening solution tank. From this fountain solution tank 10 is transported in a manner not shown dampening solution to the associated printing unit of the printing press and returned used dampening solution. These details are not shown. Regardless, is drawn from the dampening solution tank 10 via a line 12 by means of a pump 14 fountain solution and fed to a centrifugal separator 16. This separator is self-draining. It serves for a substantial separation of dampening solution and dirt particles. The separator therefore discharges largely purified dampening solution into a dampening agent collecting container 20 via a line 18. On the other hand, a dirt particle / dampening solution mixture is discharged from the separator 16 via a line 22 into a dirt and fountain solution container 24.

Der Schmutz- und Feuchtmittelbehälter 24 ist mit dem Feuchtmittelsammelbehälter 20 durch einen Überlauf 26 verbunden, der in der Zeichnung nur schematisch dargestellt ist. Der Überlauf 26 geht vom mittleren Bereich des Schmutz- und Feuchtmittelbehälters 24 aus, so dass in dem Schmutz- und Feuchtmittelbehälter 24 Schmutzpartikel nach unten absinken und Ölreste nach oben aufschwimmen können, während in mittlerer Höhe weitgehend reines Feuchtmittel zur Verfügung steht. Diese Feuchtmittelschicht kann über den in mittlerer Höhe ansetzenden Überlauf 26 abgezogen werden. Dabei kann von oben und gegebenenfalls auch von unten ein Wehr in den Überlauf hineinragen. Diese Wehre können in senkrechter Richtung einstellbar sein, so dass sie wie eine Blende lediglich die Schicht hindurchlassen, die im wesentlichen aus reinem Feuchtmittel besteht.The dirt and dampening solution tank 24 is connected to the fountain solution tank 20 through an overflow 26, which is shown only schematically in the drawing. The overflow 26 starts from the central region of the dirt and dampening solution tank 24, so that in the dirt and dampening tank 24 dirt particles fall down and oil residue can float upwards, while at a moderate level largely pure dampening solution is available. This fountain solution layer can be removed via the medium height overflow 26. It can protrude from above and possibly also from below a weir in the overflow. These weirs can be adjustable in the vertical direction so that they only pass through the layer, which essentially consists of pure dampening solution, like a diaphragm.

Von dem Feuchtmittelsammelbehälter 20 geht eine Leitung 28 aus, in der sich eine Pumpe 30 befindet. Über die Leitung 28 kann das gereinigte Feuchtmittel aus dem Feuchtmittelsammelbehälter 20 zurück in den Feuchtmitteltank 10 gepumpt werden.From the fountain solution tank 20 is a line 28, in which a pump 30 is located. Via the line 28, the purified dampening solution can be pumped from the fountain solution tank 20 back into the dampening solution tank 10.

Die Anordnung der beiden Behälter 20,24 mit dem sie verbindenden Überlauf 26 führt dazu, dass für die Reinigung des Feuchtmittels eine weitere Reinigungsstufe zur Verfügung steht, ohne dass zusätzliche Filtereinheiten verwendet werden müssen.The arrangement of the two containers 20,24 with the overflow 26 connecting them results in a further purification stage being available for the cleaning of the dampening solution without the need for additional filter units.

Der Aufwand für die Entsorgung verbrauchten Trennmittels wird reduziert.The effort for the disposal of used release agent is reduced.

Claims (8)

  1. Method for cleaning the fountain solution of a printing press with an automatically emptying separator (16) separating the dirt particles and oil residues from the fountain solution and supplying a mixture of dirt and fountain solution to a dirt and fountain solution container (24) and passing the remaining fountain solution into a fountain solution storage tank (20), whereas the mixture of dirt and fountain solution is caused to settle in layers in the dirt and fountain solution container (24) and whereas the layer containing the fountain solution is transferred into the fountain solution storage tank (20) by an overflow (26).
  2. Method according to claim 1, characterized in that a dam is inserted from above into the overflow stream.
  3. Method according to claim 1 or 2, characterized in that a dam, which can be raised from below, is provided.
  4. Method according claim 2 or 3, characterized in that the dams are height adjustable.
  5. Device for cleaning the fountain solution of a printing press with an automatically emptying separator (16), a dirt and fountain solution container (24) and a fountain solution storage tank (20), whereas the separator (16) separates the dirt particles from the fountain solution and supplies a mixture of dirt and fountain solution to a dirt and fountain solution container (24) and passes the remaining fountain solution to a fountain solution storage tank (20), whereas the dirt and fountain solution container (24) is connected with the fountain solution storage tank (20) by an overflow (26), which starts from the layer of the dirt and fountain solution container (24) containing the fountain solution.
  6. Device according to claim 5, characterized in that a dam dips from above into the flow path of the overflow (26).
  7. Device according to claim 6, characterized in that the dam is height adjustable.
  8. Device according to one of claims 3 to 7, characterized in that a raisable from below, adjustable dam is provided in the flow path of the overflow (26).
EP05009231A 2004-04-30 2005-04-27 Method and means for cleaning the dampening solution of a printing press Not-in-force EP1591244B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004021508A DE102004021508B4 (en) 2004-04-30 2004-04-30 Method and device for cleaning the dampening solution of a printing machine
DE102004021508 2004-04-30

Publications (3)

Publication Number Publication Date
EP1591244A2 EP1591244A2 (en) 2005-11-02
EP1591244A3 EP1591244A3 (en) 2005-11-09
EP1591244B1 true EP1591244B1 (en) 2009-04-08

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EP05009231A Not-in-force EP1591244B1 (en) 2004-04-30 2005-04-27 Method and means for cleaning the dampening solution of a printing press

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US (1) US7291277B2 (en)
EP (1) EP1591244B1 (en)
JP (1) JP4242853B2 (en)
DE (2) DE102004021508B4 (en)

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EP0933684A1 (en) * 1998-01-22 1999-08-04 Toyo Boseki Kabushiki Kaisha Developing system of photosensitive resin plates and apparatus used therein
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DE19955624A1 (en) * 1999-11-19 2001-05-23 Fogra Forschungsgesellschaft D Water supply for an offset printing press has a centrifugal separator in the water circuit to clean the water of any dirt or other impurities to extend or eliminate water change intervals
JP2002059531A (en) * 2000-08-17 2002-02-26 Mihara Ryoju Engineering Kk Apparatus for cleaning dampening water
US6293198B1 (en) * 2000-10-13 2001-09-25 S. T. Engineering Co., Ltd. Circulation treatment system and method for treating fountain solution
US6855487B2 (en) * 2001-10-26 2005-02-15 Kodak Polychrome Graphics, Llc Method and apparatus for refreshment and reuse of loaded developer
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DE102004021508B4 (en) * 2004-04-30 2007-04-19 Technotrans Ag Method and device for cleaning the dampening solution of a printing machine

Also Published As

Publication number Publication date
EP1591244A2 (en) 2005-11-02
EP1591244A3 (en) 2005-11-09
JP4242853B2 (en) 2009-03-25
US20060005724A1 (en) 2006-01-12
DE102004021508A1 (en) 2005-11-24
DE102004021508B4 (en) 2007-04-19
JP2005313649A (en) 2005-11-10
US7291277B2 (en) 2007-11-06
DE502005007024D1 (en) 2009-05-20

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