EP0779150A1 - Washing system of graphic industry machine - Google Patents

Washing system of graphic industry machine Download PDF

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Publication number
EP0779150A1
EP0779150A1 EP96115102A EP96115102A EP0779150A1 EP 0779150 A1 EP0779150 A1 EP 0779150A1 EP 96115102 A EP96115102 A EP 96115102A EP 96115102 A EP96115102 A EP 96115102A EP 0779150 A1 EP0779150 A1 EP 0779150A1
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EP
European Patent Office
Prior art keywords
cleaning liquid
cleaning
ion
ion exchanger
washing
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Granted
Application number
EP96115102A
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German (de)
French (fr)
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EP0779150B1 (en
Inventor
Walter R. Müller
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Baldwin Grafotec GmbH
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Baldwin Gegenheimer GmbH
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Publication of EP0779150A1 publication Critical patent/EP0779150A1/en
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    • 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
    • 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

  • the invention relates to a washing system in the graphics industry for washing off paint, fibers, dust and other contaminants from rotating bodies while these rotating bodies are rotating, with a cleaning liquid which contains solvents for dissolving the Contains paint and for dissolving other soluble contaminants, according to the preamble of claim 1. Furthermore, the invention relates to a method for a machine of the graphics industry for washing up according to the preamble of the independent dependent claim for this method.
  • washing systems for washing rotating rotary bodies of a machine in the graphics industry, in particular printing machines, and of these in turn of offset printing machines are known from various documents.
  • the cleaning agent for washing the rotating bodies is conducted in a recirculation circuit.
  • DE utility models G 91 15 948.2 and G 88 01 323.5 as well as DE-C-30 05 236 and DE-A-41 16 762 it is known to arrange mechanical filters in the return line of the recirculation circuit, by means of which from the cleaning liquid, which one flows back from a rotating body to a storage container, mechanical components are filtered.
  • DE-A 30 25 639 it is known to use a centrifuge as a filter means, through which solid contaminants are separated from the cleaning liquid.
  • cleaning fluid in the graphics industry must not have a negative impact on print quality. Therefore, modern cleaning fluids mainly consist of high-quality organic substances, which not only have a cleaning effect, but at the same time also effects that are advantageous for the printing process, for example a metered moistening of the rotating bodies during the printing process for the purpose that no printing ink from the printed printing medium on the rotating body is liable and transferred to it, which damages the Print image on the print carrier would mean.
  • "dampening solution” can also be used as the cleaning liquid, which is also used in the same printing press to form ink-repellent areas on the printing plate of the printing plate cylinder in the offset printing process.
  • the invention is not limited to the cleaning of printing unit cylinders, for example blanket cylinders, impression cylinders or printing plate cylinders, but can be used for the continuous or discontinuous cleaning of all cylinders and rollers of machines in the graphics industry, for example for cleaning the cylinders of printing units, the rollers of inking units or Damping units, for cleaning guide rollers, the cylinders of calenders, for cleaning rollers or cylinders in glue applicators and laminating machines.
  • the print carriers can be sheets, for example sheets of paper for brochures or newspapers, or webs which run from an unwind roll to a take-up roll or to a cutting device which cuts the web into sheets.
  • the object of the invention is to solve the rotating body of machines in the graphics industry from components dissolved in it, without exchanging the cleaning liquid and without affecting the operation of the machine or the print quality affect. This object is to be achieved with means which do not require large-sized devices, which are not expensive, and which are harmless with regard to fire and explosion.
  • Fig. 1 shows broken a rotary body 2 of a machine in the graphics industry, for example a rubber impression cylinder, impression cylinder, impression cylinder or an ink roller of an offset printing machine or the like.
  • the washing system for cleaning the rotating body 2 with a solvent-containing Cleaning liquid contains a rotating washing roller 4, which bears continuously or discontinuously on the rotating body 2, which also rotates. The speeds and directions of rotation of the rotating body 2 and the washing roller 4 are selected such that a relative movement takes place between their abutting surfaces. Instead of a washing roller 4, another washing element can also be used.
  • the cleaning liquid is stored in a storage container 6, to which fresh cleaning liquid can also be supplied and from which the cleaning liquid is supplied to the washing roller 4 via a feed 8 and is returned to the storage container 6 via a return 10.
  • the feed 8 contains a pump 12 for conveying the cleaning liquid from the reservoir 6 to a nozzle device 14 with one or more nozzles at the end of the feed 8, which spray the cleaning liquid onto the washing roller 4.
  • Fresh cleaning liquid dripping from the washing roller 4 and dirty cleaning liquid stripped from the rotating body 2 by the washing roller 4 and optionally cleaning liquid spraying off from the rotating body 2 are collected by a collecting pan 16 at the beginning of the return 10.
  • the return 10 contains, in the flow direction, the collecting wall 16, a return tank 20 connected to it via an upstream line 18, a 2/2-way valve 22, an intermediate line 25 with a pump 24, a Filter device 26 with a coarse filter 28 and a downstream fine filter 30 for filtering solid particles from the cleaning liquid, and an ion exchanger 32 in a downstream return line section 33 between the filter device 26 and the reservoir 6.
  • the cleaning liquid circulates in the recirculation circuit consisting of reservoir 6, flow 8 and return 10 during the cleaning operation if the said first valve 22 does not have the closed position shown, but rather the open position, while all other valves shown in the drawing have their closed position.
  • the closed position means that the valves do not let any liquid through; Open position here means that the valves let liquid pass through.
  • a level switch 34 causes, via a control device, that the pumps 12 and 24 are only switched on when the cleaning liquid in the return tank 20 has reached a certain level, but not at a lower level.
  • a flushing line 36 with a second valve 38 connects the reservoir 6 to the intermediate line 25 of the return 10 upstream of its pump 24.
  • the filters 28 and 30 of the filter device 26 can be flushed in the reverse direction when the first valve 22 is closed, the second valve 38 is opened, a third valve 40 bridging the return pump 24 is opened, one on the pressure side of the return pump 24 arranged and also bypassed by the third valve 40 fourth valve 42 is closed on the pressure side of the return pump 24, the downstream return line section 33 upstream of the ion exchange 32 is closed by a fifth valve 44, the pressure side of the flow pump 12 by closing one sixth valve 46 is separated from the flow and is connected to the output of the filter device 26 by opening a seventh valve 48, the flow pump 12 is switched on while the return pump 24 is switched off.
  • the ion exchanger 32 contains at least one or more ion filters 50 arranged in series or parallel to one another and through which the cleaning liquid of the return 10 flows.
  • the ion filters 50 contain filter materials for ion exchange and thus for filtering out dissolved components of the cleaning liquid, in particular for ionically filtering out alkaline colors and of acid colors.
  • the cleaning liquid contains organic constituents which react with oxygen in air and thereby form peroxides, for example in the collecting pan 16, the washing roller 4 and / or the rotating body 2, then
  • the ion exchanger preferably also contains ion filter material which generates an ion exchange with these peroxides and thereby filters these peroxides out of the cleaning liquid.
  • the ion filter materials are preferably ion exchange resins.
  • other substances dissolved in the cleaning liquid can also be filtered out of this cleaning liquid by ion exchange.
  • the ion exchanger 32 must contain an ion exchange mass which is adapted for this.
  • the ion filter masses 50 can be exchanged or regenerated.
  • a cover 52 of the ion exchanger 32 can be removed for such an exchange.
  • regenerate the ion filter masses of the ion filter 50 they must be rinsed with a suitable chemical solution.
  • it can be connected at its lower end via an eighth valve 54 to a trough 55, and at its upper end facing away from it via a ninth valve 56 can be connected to a second regenerating agent container 58, in which the Chemical solution.
  • the downstream return line section 33 must be closed by closing the fifth valve 44 from the filter device 26 and by closing a tenth Valve 60 are separated from the reservoir 6 of the cleaning liquid.
  • the ion exchanger 32 can also be used without an upstream filter device 26 for filtering solid contaminants. According to other embodiments, the ion exchanger 32 can also be used in combination with other types of filters.
  • a centrifugal separator e.g. a decanter can be arranged in the return 10 upstream of the ion exchanger 32.
  • the principle of action of the invention or of the ion exchanger is based on the fact that printing ink ingredients, such as, for example, manganese salts and cobalt salts and peroxides, are bound to strongly acidic and / or strongly basic ion exchangers, preferably ion exchanger resins.
  • the ion exchanger is preferably a so-called mixed bed reactor, which works according to the so-called mixed bed process.
  • the invention can also be referred to as an "absorbent solvent cleaning system for offset machines" or as a “regeneration method for printing blanket cleaning".
  • Interchangeable cartridge-shaped ion exchange filter elements are preferably used for the invention.

Landscapes

  • Cleaning By Liquid Or Steam (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Detergent Compositions (AREA)

Abstract

The unit comprises a solvent recirculation circuit (6,8,10). This has a forward feed (8) for feeding cleaning fluid from a storage tank (6) to a rotary body (2) to be cleaned. A back flow (10) feeds back the cleaning fluid from the body's washing device (4,14,16). A cleaner cleans the returned dirtied cleaning fluid on its way in the back flow. The cleaner incorporates at least one ion exchanger (32), which separates out at least one of the dissolved contaminants from the cleaning fluid.

Description

Die Erfindung betrifft eine Waschanlage der graphischen Industrie zum Abwaschen von Farben, Fasern, Staub und anderen Verunreinigungen von Rotationskörpern, während diese Rotationskörper rotieren, mit einer Reinigungsflüssigkeit, welche Lösemittel zum Lösen der Farbe und zum Lösen von anderen löslichen Verunreinigungen enthält, gemäß dem Oberbegriff von Anspruch 1. Ferner betrifft die Erfindung ein Verfahren für eine Maschine der graphischen Industrie zum Abwaschen gemäß dem Oberbegriff des unabhängigen Unteranspruches für dieses Verfahren.The invention relates to a washing system in the graphics industry for washing off paint, fibers, dust and other contaminants from rotating bodies while these rotating bodies are rotating, with a cleaning liquid which contains solvents for dissolving the Contains paint and for dissolving other soluble contaminants, according to the preamble of claim 1. Furthermore, the invention relates to a method for a machine of the graphics industry for washing up according to the preamble of the independent dependent claim for this method.

Waschanlagen zum Waschen von rotierenden Rotationskörpern einer Maschine der graphischen Industrie, insbesondere von Druckmaschinen, und hiervon wiederum von Offset-Druckmaschinen, sind aus verschiedenen Schriften bekannt. Das Reinigungsmittel zum Waschen der Rotationskörper wird in einem Rezirkulationskreislauf geführt. Aus den DE-Gebrauchsmustern G 91 15 948.2 und G 88 01 323.5 sowie der DE-C-30 05 236 und DE-A-41 16 762 ist es bekannt, im Rücklauf des Rezirkulationskreislaufes mechanische Filter anzuordnen, durch welche aus der Reinigungsflüssigkeit, welcher von einem Rotationskörper zu einem Vorratsbehälter zurückfließt, mechanische Bestandteile gefiltert werden. Aus der DE-A 30 25 639 ist bekannt, als Filtermittel eine Zentrifuge zu verwenden, durch welche aus der Reinigungsflüssigkeit Festkörper-Verunreinigungen abgesondert werden. Ferner ist es aus der DE-A 41 16 762, der US-A 5 323 705 und den Patent Abstracts of Japan, M-983, June 12, 1990 Vol. 14/No. 271 und der darin beschriebenen japanischen Patentanmelde-Veröffentlichung 2-78552 (A) bekannt, die Reinigungsflüssigkeit durch Destillation zu reinigen.Washing systems for washing rotating rotary bodies of a machine in the graphics industry, in particular printing machines, and of these in turn of offset printing machines, are known from various documents. The cleaning agent for washing the rotating bodies is conducted in a recirculation circuit. From DE utility models G 91 15 948.2 and G 88 01 323.5 as well as DE-C-30 05 236 and DE-A-41 16 762 it is known to arrange mechanical filters in the return line of the recirculation circuit, by means of which from the cleaning liquid, which one flows back from a rotating body to a storage container, mechanical components are filtered. From DE-A 30 25 639 it is known to use a centrifuge as a filter means, through which solid contaminants are separated from the cleaning liquid. It is also known from DE-A 41 16 762, US-A 5 323 705 and the Patent Abstracts of Japan, M-983, June 12, 1990 Vol. 14 / No. 271 and Japanese Patent Application Publication 2-78552 (A) described therein to purify the cleaning liquid by distillation.

Bei der Reinigung mit Filtern oder Zentrifugen werden nur Feststoff-Partikel aus der Reinigungsflüssigkeit herausgefiltert. In der Reinigungsflüssigkeit gelöste Verunreinigungs-Bestandteile können damit nicht herausgefiltert werden, insbesondere Druckfarbenreste, welche in der Reinigungsflüssigkeit gelöst sind. Dadurch wird die Reinigungsflüssigkeit nach einiger Betriebszeit mit gelösten Verunreinigungen gesättigt und muß ausgetauscht werden oder chemisch aufbereitet werden. Die mechanischen Filter haben den Nachteil, das sie durch die Feststoff-Verunreinigungen nach einiger Betriebszeit verstopfen und zur Verhinderung einer solchen Verstopfung von Zeit zu Zeit gereinigt oder ausgetauscht werden müssen. Destillations-Vorrichtungen haben den Nachteil, daß sie einen großen Apparateaufbau benötigen und teuer sind. Außerdem sind sie gefährlich, weil der Siedepunkt der Komponenten der Reinigungsflüssigkeit normalerweise über ihrem Flammpunkt liegt.When cleaning with filters or centrifuges, only solid particles are filtered out of the cleaning liquid. Contamination components dissolved in the cleaning liquid cannot be filtered out with it, in particular printing ink residues which are dissolved in the cleaning liquid. As a result, the cleaning liquid becomes saturated with dissolved impurities after some operating time and must be replaced or chemically processed. The mechanical filters have the disadvantage that they clog due to the solid impurities after some operating time and have to be cleaned or replaced from time to time to prevent such a blockage. Distillation devices have the disadvantage that they require a large apparatus structure and are expensive. They are also dangerous because the boiling point of the components of the cleaning fluid is usually above their flash point.

Die Reinigungsflüssigkeit in der graphischen Industrie darf keinen negativen Einfluß auf die Druckqualität haben. Deshalb bestehen moderne Reinigungsflüssigkeiten vorwiegend aus hochwertigen organischen Stoffen, welche nicht nur eine Reinigungswirkung haben, sondern gleichzeitig auch Wirkungen, welche für den Druckprozeß vorteilhaft sind, beispielsweise ein dosiertes Befeuchten der Rotationskörper während des Druckprozesses zu dem Zweck, daß keine Druckfarbe vom bedruckten Druckträger am Rotationskörper haftet und auf diesen übertragen wird, was eine Beschädigung des Druckbildes auf dem Druckträger bedeuten würde. Als Reinigungsflüssigkeit kann beispielsweise auch "Feuchtmittel" verwendet werden, welches in der gleichen Druckmaschine auch dazu verwendet wird, im Offset-Druckverfahren auf der Druckplatte des Druckplattenzylinders farbabstoßende Bereiche zu bilden.The cleaning fluid in the graphics industry must not have a negative impact on print quality. Therefore, modern cleaning fluids mainly consist of high-quality organic substances, which not only have a cleaning effect, but at the same time also effects that are advantageous for the printing process, for example a metered moistening of the rotating bodies during the printing process for the purpose that no printing ink from the printed printing medium on the rotating body is liable and transferred to it, which damages the Print image on the print carrier would mean. For example, "dampening solution" can also be used as the cleaning liquid, which is also used in the same printing press to form ink-repellent areas on the printing plate of the printing plate cylinder in the offset printing process.

Die Erfindung ist nicht auf die Reinigung von Druckwerkszylindern, beispielsweise Gummituchzylinder, Gegendruckzylinder oder Druckplattenzylinder beschränkt, sondern für die kontinuierliche oder diskontinuierliche Reinigung von allen Zylindern und Walzen von Maschinen der graphischen Industrie anwendbar, beispielsweise zum Reinigen der Zylinder von Druckwerken, der Rollen von Farbwerken oder Feuchtwerken, zum Reinigen von Führungswalzen, der Zylinder von Kalandern, zum Reinigen von Walzen oder Zylindern in Leimauftragswerken und Kaschiermaschinen. Die Druckträger können Bögen, beispielsweise Papierbögen für Prospekte oder Zeitungen, oder Bahnen sein, welche von einer Abwickelrolle zu einer Aufwickelrolle oder zu einer Schneidvorrichtung laufen, welche die Bahn in Bögen schneidet.The invention is not limited to the cleaning of printing unit cylinders, for example blanket cylinders, impression cylinders or printing plate cylinders, but can be used for the continuous or discontinuous cleaning of all cylinders and rollers of machines in the graphics industry, for example for cleaning the cylinders of printing units, the rollers of inking units or Damping units, for cleaning guide rollers, the cylinders of calenders, for cleaning rollers or cylinders in glue applicators and laminating machines. The print carriers can be sheets, for example sheets of paper for brochures or newspapers, or webs which run from an unwind roll to a take-up roll or to a cutting device which cuts the web into sheets.

Durch die Erfindung soll die Aufgabe gelöst werden, Rotationskörper von Maschinen der graphischen Industrie von in ihr gelösten Bestandteilen zu Reinigen, ohne die Reinigungsflüssigkeit auszutauschen und ohne den Betrieb der Maschine oder die Druckqualität zu beeinträchtigen. Diese Aufgabe soll mit Mitteln gelöst werden, welche keine konstruktiv großen Vorrichtungen benötigen, welche nicht teuer sind, und welche bezüglich Feuergefahr und Explosionsgefahr unbedenklich sind.The object of the invention is to solve the rotating body of machines in the graphics industry from components dissolved in it, without exchanging the cleaning liquid and without affecting the operation of the machine or the print quality affect. This object is to be achieved with means which do not require large-sized devices, which are not expensive, and which are harmless with regard to fire and explosion.

Diese Aufgabe wird gemäß der Erfindung durch die Kombination der Merkmale der unabhängigen Ansprüche gelöst.This object is achieved according to the invention by the combination of the features of the independent claims.

Weitere Merkmale der Erfindung sind in den Unteransprüchen enthalten.Further features of the invention are contained in the subclaims.

Die Erfindung wird im folgenden mit Bezug auf die beiliegende Zeichnung anhand einer bevorzugter Ausführungsform als Beispiel beschrieben, darin zeigt

Fig. 1
schematisch eine Waschanlage nach der Erfindung für eine Maschine der graphischen Industrie zum Abwaschen von Farbe, Fasern, Staub und anderen Verunreinigungen von Rotationskörpern dieser Maschine.
The invention is described below with reference to the accompanying drawings using a preferred embodiment as an example, therein
Fig. 1
schematically a washing system according to the invention for a machine in the graphics industry for washing off paint, fibers, dust and other contaminants from rotating bodies of this machine.

Fig. 1 zeigt abgebrochen einen Rotationskörper 2 einer Maschine der graphischen Industrie, beispielsweise einen Gummidruckzylinder, Druckzylinder, Gegendruckzylinder oder eine Farbwalze einer Offset-Druckmaschine oder dergleichen. Die Waschanlage zur Reinigung des Rotationskörpers 2 mit einer Lösemittel enthaltenden Reinigungsflüssigkeit enthält eine rotierende Waschwalze 4, welche kontinuierlich oder diskontinuierlich an dem Rotationskörper 2 anliegt, welcher ebenfalls rotiert. Die Drehzahlen und Drehrichtungen des Rotationskörpers 2 und der Waschwalze 4 sind derart gewählt, daß zwischen ihren aneinander anliegenden Oberflächen eine Relativbewegung stattfindet. Statt einer Waschwalze 4 kann auch ein anderes Waschelement verwendet werden. Die Reinigungsflüssigkeit ist in einem Vorratsbehälter 6 gespeichert, welchem auch frische Reinigungsflüssigkeit zugeführt werden kann und von welchem die Reinigungsflüssigkeit über einen Vorlauf 8 der Waschwalze 4 zugeführt und über einen Rücklauf 10 dem Vorratsbehälter 6 wieder zurückgeführt wird. Der Vorlauf 8 enthält eine Pumpe 12 zur Förderung der Reinigungsflüssigkeit aus dem Vorratsbehälter 6 zu einer Düsenvorrichtung 14 mit einer oder mehreren Düsen am Ende des Vorlaufes 8, welche die Reinigungsflüssigkeit auf die Waschwalze 4 sprühen. Von der Waschwalze 4 abtropfende frische Reinigungsflüssigkeit sowie vom Rotationskörper 2 von der Waschwalze 4 abgestreifte verschmutzte Reinigungsflüssigkeit und gegebenenfalls vom Rotationskörper 2 abspritzende Reinigungsflüssigkeit wird von einer Auffangwanne 16 am Anfang des Rücklaufes 10 aufgefangen. Der Rücklauf 10 enthält nacheinander in Strömungsrichtung die Auffangwand 16, einen über eine stromaufwärtige Leitung 18 mit ihr verbundenen Rücklaufbehälter 20, ein 2/2-Wegeventil 22, eine Zwischenleitung 25 mit einer Pumpe 24, eine Filtervorrichtung 26 mit einem Grobfilter 28 und einem nachgeschalteten Feinfilter 30 zum Filtern von Feststoff-Partikeln aus der Reinigungsflüssigkeit, und einen Ionenaustauscher 32 in einem stromabwärtigen Rücklauf-Leitungsabschnitt 33 zwischen der Filtervorrichtung 26 und dem Vorratsbehälter 6.Fig. 1 shows broken a rotary body 2 of a machine in the graphics industry, for example a rubber impression cylinder, impression cylinder, impression cylinder or an ink roller of an offset printing machine or the like. The washing system for cleaning the rotating body 2 with a solvent-containing Cleaning liquid contains a rotating washing roller 4, which bears continuously or discontinuously on the rotating body 2, which also rotates. The speeds and directions of rotation of the rotating body 2 and the washing roller 4 are selected such that a relative movement takes place between their abutting surfaces. Instead of a washing roller 4, another washing element can also be used. The cleaning liquid is stored in a storage container 6, to which fresh cleaning liquid can also be supplied and from which the cleaning liquid is supplied to the washing roller 4 via a feed 8 and is returned to the storage container 6 via a return 10. The feed 8 contains a pump 12 for conveying the cleaning liquid from the reservoir 6 to a nozzle device 14 with one or more nozzles at the end of the feed 8, which spray the cleaning liquid onto the washing roller 4. Fresh cleaning liquid dripping from the washing roller 4 and dirty cleaning liquid stripped from the rotating body 2 by the washing roller 4 and optionally cleaning liquid spraying off from the rotating body 2 are collected by a collecting pan 16 at the beginning of the return 10. The return 10 contains, in the flow direction, the collecting wall 16, a return tank 20 connected to it via an upstream line 18, a 2/2-way valve 22, an intermediate line 25 with a pump 24, a Filter device 26 with a coarse filter 28 and a downstream fine filter 30 for filtering solid particles from the cleaning liquid, and an ion exchanger 32 in a downstream return line section 33 between the filter device 26 and the reservoir 6.

Die Reinigungsflüssigkeit zirkuliert in dem aus Vorratsbehälter 6, Vorlauf 8 und Rücklauf 10 bestehenden Rezirkulationskreislauf während des Reinigungsbetriebes, wenn das genannte erste Ventil 22 nicht die dargestellte Schließstellung, sondern Offenstellung hat, während alle anderen in der Zeichnung dargestellten Ventile ihre Schließstellung haben. Schließstellung bedeutet hier, daß die Ventile keine Flüssigkeit durchlassen; Offenstellung bedeutet hier, daß die Ventile Flüssigkeit durchlassen. Ein Niveauschalter 34 bewirkt über eine Steuereinrichtung, daß die Pumpen 12 und 24 nur dann eingeschaltet werden, wenn die Reinigungsflüssigkeit im Rücklaufbehälter 20 ein bestimmtes Niveau erreicht hat, jedoch nicht bei einem niedrigeren Niveau.The cleaning liquid circulates in the recirculation circuit consisting of reservoir 6, flow 8 and return 10 during the cleaning operation if the said first valve 22 does not have the closed position shown, but rather the open position, while all other valves shown in the drawing have their closed position. The closed position here means that the valves do not let any liquid through; Open position here means that the valves let liquid pass through. A level switch 34 causes, via a control device, that the pumps 12 and 24 are only switched on when the cleaning liquid in the return tank 20 has reached a certain level, but not at a lower level.

Eine Freispülleitung 36 mit einem zweiten Ventil 38 verbindet den Vorratsbehälter 6 mit der Zwischenleitung 25 des Rücklaufes 10 stromaufwärts seiner Pumpe 24. Durch Schließen des ersten Ventils 22 und Öffnen des zweiten Ventils 38 können die Filter 28 und 30 der Filtervorrichtung 26 in Vorwärtsrichtung gespült werden, wobei nur die Rücklauf-Pumpe 24 eingeschaltet ist, während die Vorlauf-Pumpe 12 ausgeschaltet ist.A flushing line 36 with a second valve 38 connects the reservoir 6 to the intermediate line 25 of the return 10 upstream of its pump 24. By closing the first valve 22 and opening the second valve 38, the filters 28 and 30 of the filter device 26 can be flushed in the forward direction, only the return pump 24 is switched on while the flow pump 12 is switched off.

Die Filter 28 und 30 der Filtervorrichtung 26 können in Rückwärtsrichtung gespült werden, wenn das erste Ventil 22 geschlossen wird, das zweite Ventil 38 geöffnet wird, ein die Rücklauf-Pumpe 24 überbrückendes drittes Ventil 40 geöffnet, ein auf der Druckseite der Rücklauf-Pumpe 24 angeordnetes und vom dritten Ventil 40 ebenfalls überbrücktes viertes Ventil 42 auf der Druckseite der Rücklauf-Pumpe 24 verschlossen wird, der stromabwärtige Rücklauf-Leitungsabschnitt 33 stromaufwärts des Ionenaustausches 32 durch ein fünftes Ventil 44 geschlossen wird, die Druckseite der Vorlauf-Pumpe 12 durch Schließen eines sechsten Ventils 46 vom Vorlauf getrennt und durch Öffnen eines siebten Ventils 48 mit dem Ausgang der Filtervorrichtung 26 verbunden wird, die Vorlaufpumpe 12 eingeschaltet wird, während die Rücklauf-Pumpe 24 abgeschaltet ist.The filters 28 and 30 of the filter device 26 can be flushed in the reverse direction when the first valve 22 is closed, the second valve 38 is opened, a third valve 40 bridging the return pump 24 is opened, one on the pressure side of the return pump 24 arranged and also bypassed by the third valve 40 fourth valve 42 is closed on the pressure side of the return pump 24, the downstream return line section 33 upstream of the ion exchange 32 is closed by a fifth valve 44, the pressure side of the flow pump 12 by closing one sixth valve 46 is separated from the flow and is connected to the output of the filter device 26 by opening a seventh valve 48, the flow pump 12 is switched on while the return pump 24 is switched off.

Der Ionenaustauscher 32 enthält mindestens einen, oder mehrere in Reihe oder parallel zueinander angeordnete, von der Reinigungsflüssigkeit des Rücklaufes 10 durchströmte Ionenfilter 50. Die Ionenfilter 50 enthalten Filtermassen zum Ionenaustausch und damit zum Ausfiltern von gelösten Bestandteilen der Reinigungsflüssigkeit, insbesondere zum ionischen Herausfiltern von alkalischen Farben und von sauren Farben. In der bevorzugten Ausführungsform, wenn die Reinigungsflüssigkeit organische Bestandteile enthält, welche in Luft mit Sauerstoff reagieren und dadurch Peroxyde bilden, beispielsweise in der Auffangwanne 16, der Waschwalze 4 und/oder dem Rotationskörper 2, dann enthält der Ionenaustauscher vorzugsweise auch Ionenfiltermasse, welche mit diesen Peroxyden einen Ionenaustausch erzeugt und dadurch diese Peroxyde aus der Reinigungsflüssigkeit ausfiltert. Die Ionenfiltermassen sind vorzugsweise Ionenaustauschharze. Selbstverständlich können auch andere in der Reinigungsflüssigkeit gelöste Stoffe aus dieser Reinigungsflüssigkeit durch Ionenaustausch herausgefiltert werden. Je nach Art der gelösten Stoffe, welche herausgefiltert werden sollen, muß der Ionenaustauscher 32 eine dafür angepaßte Ionenaustauschmasse enthalten.The ion exchanger 32 contains at least one or more ion filters 50 arranged in series or parallel to one another and through which the cleaning liquid of the return 10 flows. The ion filters 50 contain filter materials for ion exchange and thus for filtering out dissolved components of the cleaning liquid, in particular for ionically filtering out alkaline colors and of acid colors. In the preferred embodiment, if the cleaning liquid contains organic constituents which react with oxygen in air and thereby form peroxides, for example in the collecting pan 16, the washing roller 4 and / or the rotating body 2, then The ion exchanger preferably also contains ion filter material which generates an ion exchange with these peroxides and thereby filters these peroxides out of the cleaning liquid. The ion filter materials are preferably ion exchange resins. Of course, other substances dissolved in the cleaning liquid can also be filtered out of this cleaning liquid by ion exchange. Depending on the type of dissolved substances which are to be filtered out, the ion exchanger 32 must contain an ion exchange mass which is adapted for this.

Wenn nach einiger Betriebszeit der Ionenaustauscher 32 keine austauschbaren Ionen mehr hat, können die Ionenfiltermassen 50 ausgetauscht oder regeneriert werden. Für einen solchen Austausch ist ein Deckel 52 des Ionenaustauschers 32 abnehmbar. Für eine Regenerierung der Ionenfiltermassen der Ionenfilter 50 müssen sie mit einer geeigneten Chemikalienlösung gespült werden. Für diese Spülung zur Regeneration des Ionenaustauschers 32 ist er an seinem unteren Ende über ein achtes Ventil 54 mit einer Wanne 55 verbindbar, und an seinem dazu abgewandten oberen Ende über ein neuntes Ventil 56 mit einem zweiten Regenerationsmittel-Behälter 58 verbindbar, in welchem sich die Chemikalienlösung befindet. Während der Spülung des Ionenaustauschers 32 mit der Chemikalienlösung muß der stromabwärtige Rücklauf-Leitungsabschnitt 33 durch Schließen des fünften Ventils 44 von der Filtervorrichtung 26 und durch Schließen eines zehnten Ventils 60 vom Vorratsbehälter 6 der Reinigungsflüssigkeit getrennt werden.If, after some operating time, the ion exchanger 32 no longer has any exchangeable ions, the ion filter masses 50 can be exchanged or regenerated. A cover 52 of the ion exchanger 32 can be removed for such an exchange. To regenerate the ion filter masses of the ion filter 50, they must be rinsed with a suitable chemical solution. For this rinsing for the regeneration of the ion exchanger 32, it can be connected at its lower end via an eighth valve 54 to a trough 55, and at its upper end facing away from it via a ninth valve 56 can be connected to a second regenerating agent container 58, in which the Chemical solution. During the flushing of the ion exchanger 32 with the chemical solution, the downstream return line section 33 must be closed by closing the fifth valve 44 from the filter device 26 and by closing a tenth Valve 60 are separated from the reservoir 6 of the cleaning liquid.

Der Ionenaustauscher 32 kann auch ohne eine vorgeschaltete Filtereinrichtung 26 zum Filtern von Feststoff-Verunreinigungen verwendet werden. Gemäß anderen Ausführungsformen kann der Ionenaustauscher 32 auch in Kombination mit anderen Filterarten verwendet werden.The ion exchanger 32 can also be used without an upstream filter device 26 for filtering solid contaminants. According to other embodiments, the ion exchanger 32 can also be used in combination with other types of filters.

Zum Ausfiltern von ungelösten Feststoff-Verunreinigungen kann anstelle oder zusätzlich der Filtervorrichtung 26 eine Fliehkraft-Abscheidevorrichtung, z.B. ein Dekanter, im Rücklauf 10 stromaufwärts des Ionenaustauschers 32 angeordnet werden.To filter out undissolved solid contaminants, a centrifugal separator, e.g. a decanter can be arranged in the return 10 upstream of the ion exchanger 32.

Das Wirkprinzip der Erfindung bzw. des Ionenaustauschers beruht darauf, daß Druckfarben-Inhaltsstoffe, wie zum Beispiel Mangansalze und Kobaltsalze sowie Peroxyde, an stark saure und/oder an stark basische Ionenaustauscher, vorzugsweise Ionenaustauscher-Harze, gebunden werden. Der Ionenaustauscher ist vorzugsweise ein sogenannter Mischbettreaktor, welcher nach dem sogenannten Mischbettverfahren arbeitet. Dadurch werden sowohl die Druckfarben-Inhaltsstoffe, welche durch saure Ionenaustauscher, als auch die, welche durch basische Ionenaustauscher gebunden werden können, aus der Reinigungsflüssigkeit ausgeschieden.The principle of action of the invention or of the ion exchanger is based on the fact that printing ink ingredients, such as, for example, manganese salts and cobalt salts and peroxides, are bound to strongly acidic and / or strongly basic ion exchangers, preferably ion exchanger resins. The ion exchanger is preferably a so-called mixed bed reactor, which works according to the so-called mixed bed process. As a result, both the printing ink ingredients, which can be bound by acidic ion exchangers, and those which can be bound by basic ion exchangers, are eliminated from the cleaning liquid.

Die Erfindung kann auch als "absorbtive Lösemittelreinigungsanlage für Offsetmaschinen" oder als "Regenerationsverfahren für Drucktuchreinigung" bezeichnet werden. Vorzugsweise werden für die Erfindung austauschbare patronenförmige Ionenaustauscher-Filterelemente verwendet.The invention can also be referred to as an "absorbent solvent cleaning system for offset machines" or as a "regeneration method for printing blanket cleaning". Interchangeable cartridge-shaped ion exchange filter elements are preferably used for the invention.

Im Rahmen der Erfindung bedeutet "mindestens", daß eines oder mehrere der so bezeichneten Elemente in Parallelschaltung oder in Reihenschaltung zueinander verwendet werden können.In the context of the invention, “at least” means that one or more of the elements referred to in this way can be used in parallel or in series with one another.

Claims (11)

Waschanlage einer Maschine der graphischen Industrie zum Abwaschen von Farben, Fasern, Staub und anderen Verunreinigungen von Rotationskörpern mit einer Reinigungsflüssigkeit, welche Lösemittel zum Lösen von mindestens einem der löslichen Verunreinigungen enthält, wobei die Waschanlage folgendes aufweist: einen Rezirkulationskreislauf (6, 8, 10), welcher einen Vorlauf (8) zum Zuführen der Reinigungsflüssigkeit aus einem Vorratsbehälter (6) zu dem zu reinigenden Rotationskörper (2) und einen Rücklauf (10) zum Zurückführen der Reinigungsflüssigkeit von einer Waschvorrichtung (4, 14, 16), mit welcher der Rotationskörper (2) gewaschen wird, zu dem Vorratsbehälter (6); Reinigungsmittel (32) zum Reinigen der zurückgeführten verschmutzten Reinigungsflüssigkeit auf ihrem Weg im Rücklauf (10);
dadurch gekennzeichnet, daß
die Reinigungsmittel mindestens einen Ionenaustauscher (32) aufweisen, welcher derart ausgebildet ist, daß er mindestens eines der gelösten Verunreinigungen aus der Reinigungsflüssigkeit durch Ionenaustausch ausscheidet.Washing machine of a machine of the graphic industry for washing off colors, fibers, dust and other impurities from rotating bodies with a cleaning liquid, which solvent for dissolving at least one of the soluble contaminants, the washing installation having the following: a recirculation circuit (6, 8, 10) which has a flow (8) for supplying the cleaning liquid from a storage container (6) to the rotating body (2) to be cleaned and a return (10) for returning the cleaning liquid from a washing device (4, 14, 16) with which the rotary body (2) is washed to the storage container (6); Cleaning means (32) for cleaning the returned dirty cleaning liquid on its way in the return line (10);
characterized in that
the cleaning agents have at least one ion exchanger (32) which is designed such that it separates at least one of the dissolved contaminants from the cleaning liquid by ion exchange. Waschanlage nach Anspruch 1,
dadurch gekennzeichnet, daß
der Ionenaustauscher (32) mindestens eine Ionenfiltermasse zur Ionen-Ausfilterung von Farben, insbesondere von alkalischen Farben und/oder sauren Farben, enthält.Washing system according to claim 1,
characterized in that
the ion exchanger (32) contains at least one ion filter mass for ion filtering out colors, in particular alkaline colors and / or acid colors. Waschanlage nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß
der Ionenaustauscher (32) eine Ionenfiltermasse für die Ionenausfilterung von Peroxyden aus der Reinigungsflüssigkeit enthält.Washing system according to claim 1 or 2,
characterized in that
the ion exchanger (32) contains an ion filter mass for the ion filtering of peroxides from the cleaning liquid. Waschanlage nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß
die Ionenfiltermasse mehrere verschiedene Ionenaustauschharze enthält.Washing system according to one of the preceding claims,
characterized in that
the ion filter mass contains several different ion exchange resins. Waschanlage nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß
Mittel (54, 55, 56, 58) zur Regenerierung des Ionenaustauschers (32) vorgesehen sind, ohne daß der Ionenaustauscher ganz oder teilweise ausgebaut oder zerlegt zu werden braucht.Washing system according to one of the preceding claims,
characterized in that
Means (54, 55, 56, 58) are provided for regenerating the ion exchanger (32) without the ion exchanger needing to be wholly or partially removed or disassembled. Waschanlage nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, daß
die Ionenfiltermasse (50) des Ionenaustauschers (32) austauschbar angeordnet ist.Washing system according to one of claims 1 to 4,
characterized in that
the ion filter mass (50) of the ion exchanger (32) is arranged interchangeably. Waschanlage nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß
dem Ionenaustauscher (32) eine Vorrichtung (26) zum Ausfiltern von Feststoff-Verunreinigungen aus der zurückgeführten Reinigungsflüssigkeit strömungsmäßig vorgeschaltet ist.Washing system according to one of the preceding claims,
characterized in that
the ion exchanger (32) has a device (26) for filtering out solid impurities is upstream of the returned cleaning liquid. Verfahren für eine Maschine der graphischen Industrie zum Abwaschen von Farben, Fasern, Staub und anderen Verunreinigungen von Rotationskörpern mit einer Reinigungsflüssigkeit, welche Lösemittel zum Lösen von mindestens einem der löslichen Verunreinigungen enthält, wobei das Verfahren folgende Schritte aufweist: Rezirkulieren der Reinigungsflüssigkeit aus einem Vorratsbehälter (6) zu einer Reinigungsvorrichtung (4, 14, 16) zur Reinigung des Rotationskörpers (2) und wieder zurück in den Vorratsbehälter (6); Reinigen der Reinigungsflüssigkeit auf ihrem Rückweg von der Reinigungsvorrichtung (4, 14, 16) zum Vorratsbehälter (6);
dadurch gekennzeichnet, daß
die Reinigungsflüssigkeit zum Zweck ihrer Reinigung durch mindestens einen Ionenaustauscher (32) hindurchgeleitet wird, welcher derart ausgebildet ist, daß er mindestens eine der in der Reinigungsflüssigkeit gelösten Verunreinigungen durch Ionenaustausch mit diesen Verunreinigungen aus der Reinigungsflüssigkeit ausscheidet.A method for a machine in the graphics industry for washing off paint, fibers, dust and other contaminants from rotating bodies with a cleaning fluid which contains solvents for dissolving at least one of the soluble contaminants, the method comprising the following steps: recirculating the cleaning fluid from a storage container ( 6) to a cleaning device (4, 14, 16) for cleaning the rotating body (2) and back into the storage container (6); Cleaning the cleaning liquid on its way back from the cleaning device (4, 14, 16) to the storage container (6);
characterized in that
the cleaning liquid is passed through at least one ion exchanger (32) for the purpose of cleaning, which is designed such that it separates at least one of the contaminants dissolved in the cleaning liquid from the cleaning liquid by ion exchange with these contaminants. Verfahren nach Anspruch 8,
dadurch gekennzeichnet, daß
im Ionenaustauscher (32) mindestens Farben, alkalische und/oder saure Farben, durch Ionenaustausch mit ihnen aus der Reinigungsflüssigkeit ausgeschieden werden.A method according to claim 8,
characterized in that
in the ion exchanger (32) at least colors, alkaline and / or acid colors Ion exchange with them can be excreted from the cleaning liquid. Verfahren nach Anspruch 8 oder 9,
dadurch gekennzeichnet, daß
im Ionenaustauscher (32) Peroxyde durch Ionenaustausch ausgefiltert werden.Method according to claim 8 or 9,
characterized in that
in the ion exchanger (32) peroxides are filtered out by ion exchange. Verfahren nach einem der Ansprüche 8 bis 10,
dadurch gekennzeichnet, daß
von der Reinigungsflüssigkeit Feststoff-Verunreinigungen stromaufwärts des Ionenaustauschers durch eine Filtervorrichtung (26) ausgefiltert werden.Method according to one of claims 8 to 10,
characterized in that
solid contaminants are filtered out from the cleaning liquid upstream of the ion exchanger by a filter device (26).
EP96115102A 1995-12-15 1996-09-20 Washing system of graphic industry machine Expired - Lifetime EP0779150B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19546972 1995-12-15
DE19546972A DE19546972A1 (en) 1995-12-15 1995-12-15 Washing machine of a machine of the graphic industry

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EP0779150B1 EP0779150B1 (en) 2000-03-01

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EP1273331A2 (en) * 2001-07-05 2003-01-08 MAN Roland Druckmaschinen AG Treatment of used washing compositions
WO2006095371A1 (en) * 2005-03-10 2006-09-14 Universita'degli Studi Di Salerno Process for cleaning engraved cylinders used in printing and packaging industry from adhesive and/or ink residues
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WO2023078865A1 (en) * 2021-11-03 2023-05-11 Bobst Bielefeld Gmbh System for recovering a cleaning solution and printing machine

Also Published As

Publication number Publication date
ATE190010T1 (en) 2000-03-15
EP0779150B1 (en) 2000-03-01
DE19546972A1 (en) 1997-06-19
DE59604538D1 (en) 2000-04-06

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