EP1787814B1 - Cleaning device for the dampening water of an offset printing machine - Google Patents

Cleaning device for the dampening water of an offset printing machine Download PDF

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Publication number
EP1787814B1
EP1787814B1 EP20060023351 EP06023351A EP1787814B1 EP 1787814 B1 EP1787814 B1 EP 1787814B1 EP 20060023351 EP20060023351 EP 20060023351 EP 06023351 A EP06023351 A EP 06023351A EP 1787814 B1 EP1787814 B1 EP 1787814B1
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EP
European Patent Office
Prior art keywords
dampening water
cleaning device
level
printing machine
dampening solution
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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 - Fee Related
Application number
EP20060023351
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German (de)
French (fr)
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EP1787814A3 (en
EP1787814A2 (en
Inventor
Christian Walczyk
Wilhelm Roer
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Technotrans SE
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Technotrans SE
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    • 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
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F35/00—Cleaning arrangements or 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

Definitions

  • the invention relates to a cleaning device for the dampening solution of at least one offset printing press, with a collecting container, in which the dampening solution is collected during the return from the printing press.
  • the printing plate surfaces are wetted with a fountain solution, in those areas where the ink is to be repelled, so that is not printed here.
  • the dampening solutions commonly used consist of water with a number of additives, including up to 15% alcohol and moreover anti-corrosive and antimicrobial substances, surface-active substances and the like.
  • the dampening solution is collected again after use and recirculated. During this movement in the circulation, the dampening solution is cleaned, checked for consistency and possibly adjusted, tempered, etc. In the circulation is not least for this reason in the return from the press at least one sump.
  • the dampening solution becomes increasingly soiled during use by absorbing paint residues, dust and other contaminants.
  • the disposal of the dampening solution would mean an unnecessarily high effort after each use, as new dampening solution would have to be prepared and conditioned and the used dampening solution would have to be disposed of. Cleaning the dampening solution is therefore an essential process.
  • the DE 103 60 051 A1 describes a device for cleaning dampening solution in offset printing with a processing unit, is returned to the excess dampening solution, which exits through an overflow from the dampening solution boxes and flows into an intermediate container. Whenever the liquid level of the dampening solution in the intermediate container exceeds a predetermined maximum level, dampening solution is pumped from the intermediate container to the treatment unit. This is done by means of a feed pump, which is not described in detail in the description of the document, but which is shown in a figure of the document with an intake pipe, which dips into the dampening solution located in the intermediate container below a predetermined minimum level and thus at different levels of dampening sucks at a distance below the fountain solution level.
  • the US 4,212,740 describes a filter basket for a swimming pool, which is connected to a drain of the swimming pool.
  • the drain is firmly connected to a wall in the region of the liquid level.
  • the invention is therefore an object of the invention to provide a cleaning device of the type mentioned above, which allows to eliminate in particular the driving on the surface of the fountain solution dirt from the dampening solution.
  • the cleaning device according to the invention is characterized by a suction device with at least one to be arranged in the amount of fountain solution surface, connected to a vacuum source suction head.
  • the vacuum source may be a pump which supplies the sucked soiled dampening solution directly to a centrifugal separator.
  • suction head or heads are always at the level of the surface of the dampening solution bath, since their task is to suck up dirt components on or at least at the level of the surface. If, therefore, fluctuations in the filling level are to be expected, the suction head (s) must be adjusted accordingly so that they are always at the level of the surface.
  • the sole figure is a schematic representation of a cleaning device according to the invention.
  • 10 denotes a collection container for fountain solution.
  • a dampening solution 12 the liquid level is denoted by 14.
  • the fountain solution tank 10 is part of a circulatory system. It picks up a return line, not shown, coming from the printing machine, and on the other hand connects to a supply line to the printing machine for the transport of cleaned dampening solution, which is also not shown.
  • two suction heads 16,18 which are suspended in a suitable manner so that they can suck with their inlets, not shown, the surface liquid layer.
  • the two suction heads 16,18 are connected via lines 20,22 with a multi-way valve 24. From the valve, a further line 26 extends to a pump 28, the output of which is connected via a line 30 to a centrifugal separator 32.
  • suction cups 16, 18 can be varied according to the surface area in the collecting container or also under other aspects.

Landscapes

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

Description

Die Erfindung betrifft eine Reinigungsvorrichtung für das Feuchtmittel wenigstens einer Offset-Druckmaschine, mit einem Sammelbehälter, in dem das Feuchtmittel beim Rücklauf von der Druckmaschine gesammelt wird.The invention relates to a cleaning device for the dampening solution of at least one offset printing press, with a collecting container, in which the dampening solution is collected during the return from the printing press.

Insbesondere beim Offsetdruck werden die Druckplattenoberflächen mit einem Feuchtmittel benetzt, und zwar in denjenigen Bereichen, in denen die Druckfarbe abgestoßen werden soll, so dass hier nicht gedruckt wird. Die üblicherweise verwendeten Feuchtmittel bestehen aus Wasser mit einer Reihe von Zusätzen, unter anderem bis zu 15% Alkohol und darüber hinaus antikorrosive und antimikrobielle Stoffe, oberflächenaktive Substanzen und dergleichen.In particular, in offset printing, the printing plate surfaces are wetted with a fountain solution, in those areas where the ink is to be repelled, so that is not printed here. The dampening solutions commonly used consist of water with a number of additives, including up to 15% alcohol and moreover anti-corrosive and antimicrobial substances, surface-active substances and the like.

In der Regel wird das Feuchtmittel nach Gebrauch wieder eingesammelt und im Kreislauf zurückgeführt. Während dieser Bewegung im Kreislauf wird das Feuchtmittel gereinigt, hinsichtlich seiner Konsistenz überprüft und gegebenenfalls neu eingestellt, temperiert usw.. Im Kreislauf befindet sich nicht zuletzt aus diesem Grund im Rücklauf von der Druckmaschine wenigstens ein Sammelbehälter.As a rule, the dampening solution is collected again after use and recirculated. During this movement in the circulation, the dampening solution is cleaned, checked for consistency and possibly adjusted, tempered, etc. In the circulation is not least for this reason in the return from the press at least one sump.

Das Feuchtmittel verschmutzt während seines Einsatzes durch Aufnahme von Farbresten, Staub und weiteren Schmutzstoffen zunehmend. Andererseits würde die Entsorgung des Feuchtmittels nach jedem Einsatz einen unnötig hohen Aufwand bedeuten, da neues Feuchtmittel hergestellt und konditioniert werden müßte und das gebrauchte Feuchtmittel zu entsorgen wäre. Eine Reinigung des Feuchtmittels ist daher ein wesentlicher Vorgang.The dampening solution becomes increasingly soiled during use by absorbing paint residues, dust and other contaminants. On the other hand, the disposal of the dampening solution would mean an unnecessarily high effort after each use, as new dampening solution would have to be prepared and conditioned and the used dampening solution would have to be disposed of. Cleaning the dampening solution is therefore an essential process.

Es werden verschiedene Reinigungsverfahren verwendet. Zu den angewendeten Verfahren gehört das Filtern des Feuchtmittels, jedoch erfordert dieses einen häufigen Filterwechsel, der eine besonders schmutzige Tätigkeit darstellt und manuell durchgeführt werden muß. Bekannt ist aber auch das Reinigen des Feuchtmittels in einem Zentrifugal-Separator ( DE 199 55 624 A1 ).Various cleaning methods are used. One of the methods used is the filtering of the dampening solution, but this requires frequent filter changes, which are a particularly dirty activity and must be carried out manually. However, it is also known to clean the dampening solution in a centrifugal separator ( DE 199 55 624 A1 ).

Die DE 103 60 051 A1 beschreibt eine Vorrichtung zur Reinigung von Feuchtmittel beim Offsetdruck mit einer Aufbereitungseinheit, in die überschüssiges Feuchtmittel zurückgeführt wird, das durch einen Überlauf aus den Feuchtmittelkästen austritt und in einen Zwischenbehälter fließt. Immer dann, wenn der Flüssigkeitsspiegel des Feuchtmittels im Zwischenbehälter einen vorgegebenen maximalen Füllstand übersteigt, wird Feuchtmittel aus dem Zwischenbehälter zur Aufbereitungseinheit gepumpt. Dies erfolgt mit Hilfe einer Förderpumpe, die in der Beschreibung der Druckschrift nicht näher beschrieben wird, die aber in einer Figur der Druckschrift mit einem Ansaugrohr dargestellt ist, das in das im Zwischenbehälter befindliche Feuchtmittel bis unterhalb eines vorgegebenen Mindestfüllstands eintaucht und somit bei unterschiedlichen Füllständen Feuchmittel in einem Abstand unterhalb des Feuchtmittelspiegels absaugt.The DE 103 60 051 A1 describes a device for cleaning dampening solution in offset printing with a processing unit, is returned to the excess dampening solution, which exits through an overflow from the dampening solution boxes and flows into an intermediate container. Whenever the liquid level of the dampening solution in the intermediate container exceeds a predetermined maximum level, dampening solution is pumped from the intermediate container to the treatment unit. This is done by means of a feed pump, which is not described in detail in the description of the document, but which is shown in a figure of the document with an intake pipe, which dips into the dampening solution located in the intermediate container below a predetermined minimum level and thus at different levels of dampening sucks at a distance below the fountain solution level.

Die US 4,212,740 beschreibt einen Filterkorb für ein Schwimmbad, der mit einem Abfluss des Schwimmbades verbunden ist. Der Abfluss ist fest mit einer Wandung im Bereich des Flüssigkeitsspiegels verbunden.The US 4,212,740 describes a filter basket for a swimming pool, which is connected to a drain of the swimming pool. The drain is firmly connected to a wall in the region of the liquid level.

Ein besonderes Problem, das mit den bisherigen Reinigungsverfahren noch nicht zufriedenstellend gelöst wurde, ergibt sich daraus, dass Schmutzpartikel aus dem Feuchtmittel, verbunden mit öligen Bestandteilen, aufgrund von Strömungen und Dichteunterschieden im Sammelbehälter an die Oberfläche aufsteigen, sich hier anreichern und nicht abgefördert werden.A particular problem that has not been solved satisfactorily with the previous cleaning method, results from the fact that dirt particles from the dampening solution, associated with oily components, rise due to currents and density differences in the sump to the surface, accumulate here and not be removed.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Reinigungsvorrichtung der eingangs genannten Art zu schaffen, die es gestattet, insbesondere den an der Oberfläche des Feuchtmittels treibenden Schmutz aus dem Feuchtmittel zu beseitigen.The invention is therefore an object of the invention to provide a cleaning device of the type mentioned above, which allows to eliminate in particular the driving on the surface of the fountain solution dirt from the dampening solution.

Zur Lösung dieser Aufgabe ist die erfindungsgemäße Reinigungsvorrichtung gekennzeichnet durch eine Saugeinrichtung mit wenigstens einem in Höhe der Feuchtmittel-Oberfläche anzuordnenden, mit einer Unterdruckquelle verbundenen Saugkopf.To achieve this object, the cleaning device according to the invention is characterized by a suction device with at least one to be arranged in the amount of fountain solution surface, connected to a vacuum source suction head.

Die Unterdruckquelle kann eine Pumpe sein, die das abgesaugte verschmutzte Feuchtmittel unmittelbar einem Fliehkraft-Separator zuführt.The vacuum source may be a pump which supplies the sucked soiled dampening solution directly to a centrifugal separator.

Erfindungsgemäß soll die Möglichkeit gegeben sein, möglichst an verschiedenen Stellen im Feuchtmittel-Sammelbehälter an der Flüssigkeitsoberfläche das verschmutzte Feuchtmittel abzusaugen.According to the invention should be given the opportunity to suck as possible at different locations in the fountain solution collecting tank on the liquid surface, the dirty dampening solution.

Es ist wesentlich, dass sich der oder die Saugköpfe stets in Höhe der Oberfläche des Feuchtmittelbades befinden, da ihre Aufgabe darin besteht, Schmutzbestandteile auf oder zumindest in Höhe der Oberfläche abzusaugen. Wenn daher mit Schwankungen des Füllstandes zu rechnen ist, müssen der oder die Saugköpfe entsprechend nachgeführt werden, so dass sie sich stets in Höhe der Oberfläche befinden.It is essential that the suction head or heads are always at the level of the surface of the dampening solution bath, since their task is to suck up dirt components on or at least at the level of the surface. If, therefore, fluctuations in the filling level are to be expected, the suction head (s) must be adjusted accordingly so that they are always at the level of the surface.

Im folgenden wird ein bevorzugtes Ausführungsbeispiel der Erfindung anhand der beigefügten Zeichnung näher erläutert.In the following a preferred embodiment of the invention will be described with reference to the accompanying drawings.

Die einzige Figur ist eine schematische Darstellung einer erfindungsgemäßen Reinigungsvorrichtung.The sole figure is a schematic representation of a cleaning device according to the invention.

In der Zeichnung ist mit 10 ein Sammelbehälter für Feuchtmittel bezeichnet. In dem Sammelbehälter 10 befindet sich ein Feuchtmittel 12, dessen Flüssigkeitsspiegel mit 14 bezeichnet ist. In nicht gezeigter Weise ist der Feuchtmittelbehälter 10 Teil eines Kreislaufsystems. Er nimmt eine nicht gezeigte Rücklaufleitung auf, die von der Druckmaschine kommt, und ist andererseits mit einer Zufuhrleitung zu der Druckmaschine für den Transport von gereinigtem Feuchtmittel verbunden, die ebenfalls nicht gezeigt ist.In the drawing, 10 denotes a collection container for fountain solution. In the collecting container 10 is a dampening solution 12, the liquid level is denoted by 14. In a manner not shown, the fountain solution tank 10 is part of a circulatory system. It picks up a return line, not shown, coming from the printing machine, and on the other hand connects to a supply line to the printing machine for the transport of cleaned dampening solution, which is also not shown.

In Höhe des Flüssigkeitsspiegels 14 in dem Sammelbehälter 10 befinden sich im dargestellten Fall zwei Saugköpfe 16,18, die in geeigneter Weise so aufgehängt sind, dass sie mit ihren nicht dargestellten Einlässen die Oberflächen-Flüssigkeitsschicht ansaugen können.In the amount of the liquid level 14 in the collecting container 10 are in the illustrated case, two suction heads 16,18, which are suspended in a suitable manner so that they can suck with their inlets, not shown, the surface liquid layer.

Die beiden Saugköpfe 16,18 sind über Leitungen 20,22 mit einem Mehrwegeventil 24 verbunden. Von dem Ventil aus verläuft eine weitere Leitung 26 zu einer Pumpe 28, deren Ausgang über eine Leitung 30 mit einem Zentrifugal-Separator 32 verbunden ist.The two suction heads 16,18 are connected via lines 20,22 with a multi-way valve 24. From the valve, a further line 26 extends to a pump 28, the output of which is connected via a line 30 to a centrifugal separator 32.

In dem Separator 32 werden Schmutzpartikel aus dem Feuchtmittel durch Fliehkraft abgeschieden und über eine Leitung 34 zur Entsorgung abgeführt. Gegebenenfalls kann sich auch eine geeignete Nachreinigung anschließen. Eine weitere Leitung 36 dient zur Rückleitung des gereinigten Feuchtmittels von dem Separator 32 zum Sammelbehälter 10.In the separator 32 dirt particles are separated from the dampening solution by centrifugal force and discharged via a line 34 for disposal. Optionally, a suitable post-cleaning may also follow. Another line 36 serves to return the cleaned dampening solution from the separator 32 to the collecting container 10.

Die Anzahl der Saugköpfe 16,18 kann entsprechend der Oberflächengröße im Sammelbehälter oder auch unter anderen Aspekten variiert werden.The number of suction cups 16, 18 can be varied according to the surface area in the collecting container or also under other aspects.

Claims (5)

  1. Cleaning device for the dampening water of at least one offset printing machine having a collecting tank (10) collecting the dampening water (12) after recirculation from the printing machine, characterized by a suction means (16, 18, 28) including at least one suction head (16, 18) connected to a vacuum source and to be arranged at the level of the dampening water surface.
  2. Cleaning device according to claim 1, characterized in that a pump (28) is provided as the vacuum source, which discharges the extracted dampening water for further cleaning or disposal.
  3. Cleaning device according to claim 2, characterized in that the outlet side of the pump (28) is connected to a centrifugal separator (32) via a line (30).
  4. Cleaning device according to claim 3, characterized in that the centrifugal separator comprises an outlet line (34) for dampening water containing dirt and an outlet for dampening water having been cleaned by the separator.
  5. Cleaning device according to any of the preceding claims, characterized in that the one or more suction heads (16, 18) is/are provided with a tracking means, which continuously senses the level of the dampening water tank and adapts the suction heads in case of level variations in such a way that they are always located on the surface level.
EP20060023351 2005-11-19 2006-11-09 Cleaning device for the dampening water of an offset printing machine Expired - Fee Related EP1787814B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200520018085 DE202005018085U1 (en) 2005-11-19 2005-11-19 Cleaning device for the dampening solution of an offset printing machine

Publications (3)

Publication Number Publication Date
EP1787814A2 EP1787814A2 (en) 2007-05-23
EP1787814A3 EP1787814A3 (en) 2009-10-21
EP1787814B1 true EP1787814B1 (en) 2013-07-17

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EP20060023351 Expired - Fee Related EP1787814B1 (en) 2005-11-19 2006-11-09 Cleaning device for the dampening water of an offset printing machine

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EP (1) EP1787814B1 (en)
DE (1) DE202005018085U1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008010036B3 (en) * 2008-02-20 2009-07-30 Technotrans Ag Damping solution cleaning device arrangement for use in printing machine, has additive dosing device arranged such that dosing of dampening solution additive is controlled based on parameters of damping solution cleaning device

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1126805B (en) * 1959-12-19 1962-03-29 Patent Und Verwaltungs A G Device for sucking fuel from a storage container
GB2007156A (en) * 1977-11-05 1979-05-16 Maschf Augsburg Nuernberg Ag Rotary Offset Printing Machine
US4212740A (en) * 1978-06-02 1980-07-15 Kdi American Products, Inc. Floating weir and strainer basket construction
DE3025639A1 (en) * 1980-07-07 1982-01-21 Maschinenfabrik Goebel Gmbh, 6100 Darmstadt DEVICE FOR CLEANING A WIPING CYLINDER ON A STEEL PRINTING MACHINE
DE4007599A1 (en) * 1990-03-09 1991-09-12 Henkel Kgaa Suction system for removing separate layers of liq. - such as creamy emulsion of used coolant-lubricant from tank
FR2781688B1 (en) * 1998-07-28 2000-09-29 Georges Ceresoli NON-MISCIBLE LIQUID SEPARATOR
DE10061870B4 (en) * 2000-12-12 2011-06-09 Platsch Gmbh & Co.Kg Method and device for filtering dampening solution
US6915818B2 (en) * 2003-03-07 2005-07-12 Fuel Delivery Systems, Llc Floating arm pick up device
DE10360051A1 (en) * 2003-12-22 2005-07-21 Kohnert, Bärbel Recovery for reuse of printing-press wash liquor, by surface skimming to remove ink and ink-constituents using a lipophilic endless belt
DE102004021508B4 (en) * 2004-04-30 2007-04-19 Technotrans Ag Method and device for cleaning the dampening solution of a printing machine
DE102008003447B4 (en) * 2008-01-08 2010-08-19 Technotrans Ag Decentralized cleaning system

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Publication number Publication date
EP1787814A3 (en) 2009-10-21
EP1787814A2 (en) 2007-05-23
DE202005018085U1 (en) 2006-01-19

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