EP1642717B1 - Device for cleaning surfaces of cylinders in a printing machine - Google Patents

Device for cleaning surfaces of cylinders in a printing machine Download PDF

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Publication number
EP1642717B1
EP1642717B1 EP20050019600 EP05019600A EP1642717B1 EP 1642717 B1 EP1642717 B1 EP 1642717B1 EP 20050019600 EP20050019600 EP 20050019600 EP 05019600 A EP05019600 A EP 05019600A EP 1642717 B1 EP1642717 B1 EP 1642717B1
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EP
European Patent Office
Prior art keywords
supply line
collecting container
compressed air
detergent
water
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.)
Revoked
Application number
EP20050019600
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German (de)
French (fr)
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EP1642717A1 (en
Inventor
Martin Prummer
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Technotrans SE
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Technotrans SE
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Application filed by Technotrans SE filed Critical Technotrans SE
Publication of EP1642717A1 publication Critical patent/EP1642717A1/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
    • B41F35/06—Cleaning arrangements or devices for offset cylinders

Definitions

  • the invention relates to a device for cleaning roll surfaces in printing presses with supply means for introducing water and / or cleaning agent in a common supply line to a spraying device for spraying water, detergent or a water-cleaning agent mixture on a roll surface, with a compressed air source for compressed air for pressing out the cleaning agent from the spraying device, which is connected to the supply line
  • Such a device is from the document EP-A1-0 570 763 known.
  • the US 5,303,652 A describes a cleaning system of the type mentioned with a spray bar, which has a larger number of spray nozzles and is connected to a supply line for a water-detergent mixture.
  • This supply line can be acted upon with compressed air for squeezing the mixture.
  • a disadvantage of this known system is that when introducing compressed air, the liquid cleaning agent mixture can be torn into an aerosol or mist. Thus, the uniform distribution of the liquid fraction on the roll surface is largely impossible. This is particularly regrettable because the control of the liquid delivery using compressed air is basically advantageous because it allows cost-effective solutions.
  • the invention has for its object to provide a device of the above type, which makes it possible to squeeze the detergent by means of compressed air from the spray device, without causing the adverse aerosol or mist formation.
  • the device according to the invention is characterized in that in the supply line, a collecting container is turned on and that the compressed air supply takes place on the upstream side of the collecting container.
  • the collecting container thus forms part of the supply line.
  • the collecting container has the advantage that when applying compressed air, a closed liquid block can be advanced in the direction of the spraying device and the compressed air is not introduced into the incoming liquid stream.
  • the collecting container in the shortest possible distance before the spraying device and to keep the said liquid block as closed as possible in this way.
  • the collecting container can also be attached directly to the spraying device.
  • the inlet and outlet of the collecting container are higher than the collecting area of the container, so that accumulated liquid can flow to neither one side nor the other.
  • the outlet is preferably preceded by a dip tube, so that when injecting compressed air into the sump a closed water column can be squeezed directly through the dip tube and the other part of the supply line.
  • the collecting container is formed by a lowered portion of the supply line itself.
  • the lowered portion of the supply line may be in the form of a loop or a helix.
  • the volume of the collection container should be such that the entire cleaning agent needed for the spraying process can be accommodated. Since the cleaning agent is collected in a closed volume or block at a short distance in front of the spraying device, due to the short time of the action of the compressed air, there is no significant penetration of the compressed air into the liquid volume. The cleaning agent is advanced evenly without air inclusions and pushed out of the nozzles of the spray device. Because of the uniform wetting of the surface to be cleaned, the amount of cleaning agent used can be reduced. On the other hand, a uniform cleaning effect is ensured.
  • Fig. 1 The illustration of Fig. 1 is limited to the parts of interest here. Shown is a spray device 10 with a number of nozzles 12. The spray device 10 is supplied through a supply line 14 with a mixture of water and detergent. To the right of the spraying device 10 would be in practice a surface to be sprayed, for example a pressure roller.
  • a collecting container 16 is turned on, which is formed in the first embodiment by a line section of the supply line 14. This line section is located below the portion of the supply line 14, in which the collecting container 16 is integrated. Therefore, the collecting container can receive and accumulate the cleaning agent without draining via the supply line 14.
  • the depressed portion of the supply conduit 14 is in the form of a coil or loop 18.
  • the supply conduit is circularly bent in the region of the collection container. In this section bent into a loop 18, feed lines 20, 22 for water and cleaning agent enter.
  • the loop is filled to about 2/3 with liquid.
  • compressed air is now supplied in the direction of the arrow 24, the water column collected in the loop 18 is pressed as a continuous block in the direction of the spray device 10 and the nozzles 12. Since the collection container 16 is located immediately in front of the spray device 10, the mentioned water column is only slightly torn by the compressed air.
  • Fig. 2 illustrates a spraying process.
  • a sequence of unsigned arrows in the supply line 14 and the loop 18 illustrates the movement of the water column or compressed air contained in the loop 18.
  • Fig. 3 shows a second embodiment of the invention in a schematic view.
  • the collecting container is designated in this case with 26. It is a container of any geometry.
  • the container 26 shown is cylindrical, for example. This container is arranged with its larger part lower than the supply line 14, so that the accumulated liquid can not flow off via the supply line 14.
  • the supply line 14 is interrupted and connected via an inlet 28 and an outlet 30 to the sump 26. About feed lines 32,34 water and cleaning agents can be initiated. Compressed air can also be supplied in this case via the downstream region of the supply line 14, but optionally also via a separate connection to the collecting container 26th
  • the outlet 30 and the downstream portion of the supply line 14 is preceded by a dip tube 36, which extends to below the unnamed liquid level in the reservoir 26.

Description

Die Erfindung betrifft eine Vorrichtung zur Reinigung von Walzenoberflächen in Druckmaschinen mit Zufuhreinrichtungen zum Einleiten von Wasser und/oder Reinigungsmittel in eine gemeinsame Zufuhrleitung zu einer Sprühvorrichtung zum Aufsprühen von Wasser, Reinigungsmittel oder eines Wasser-Reinigungsmittel-Gemisches auf eine Walzenoberfläche, mit einer Druckluftquelle für Druckluft zum Auspressen des Reinigungsmittels aus der Sprühvorrichtung, die mit der Zufuhrleitung verbunden istThe invention relates to a device for cleaning roll surfaces in printing presses with supply means for introducing water and / or cleaning agent in a common supply line to a spraying device for spraying water, detergent or a water-cleaning agent mixture on a roll surface, with a compressed air source for compressed air for pressing out the cleaning agent from the spraying device, which is connected to the supply line

Eine solche Vorrichtung ist aus dem Dokument EP-A1-0 570 763 bekannt.Such a device is from the document EP-A1-0 570 763 known.

Zur Erläuterung des Sprachgebrauches in der vorliegenden Beschreibung soll vorab auf folgendes hingewiesen werden. Für die Reinigung von Walzenoberflächen wird im allgemeinen ein Gemisch aus Wasser und Reinigungsmittel verwendet. Gelegentlich können aber auch Farbreste nur mit Wasser gelöst oder in anderen Fällen auch reines Reinigungsmittel aufgesprüht werden. Im weiteren Verlauf soll daher stets von Reinigungsmittel gesprochen werden.To explain the language usage in the present description, the following should be pointed out in advance. For cleaning roll surfaces, a mixture of water and detergent is generally used. Occasionally, however, paint residues can be solved only with water or sprayed in other cases, even pure detergent. In the further course should therefore always be spoken of detergent.

Soweit hier die Rede von einem Aufsprühen auf Walzenoberflächen ist, ist klarzustellen, dass die Walzenoberflächen vielfach auch unter Zuhilfenahme eines über die Walzenoberflächen gezogenen Reinigungstuches gereinigt werden. In diesem Fall würde das aufgesprühte Reinigungsmittel zunächst auf das Reinigungstuch und durch dieses hindurch auf die Walzenoberfläche gelangen. Beide Varianten sollen hier einbezogen werden.As far as there is talk here of a spraying on roll surfaces, it should be clarified that the roll surfaces are often cleaned with the aid of a cleaning cloth pulled over the roll surfaces. In this case, the sprayed-on cleaning agent would first reach the cleaning cloth and through it onto the roll surface. Both variants should be included here.

Die U.S. 5,303,652 A beschreibt ein Reinigungssystem der eingangs genannten Art mit einem Sprühbalken, der eine größere Anzahl von Sprühdüsen aufweist und mit einer Zufuhrleitung für ein Wasser-Reinigungsmittel-Gemisch verbunden ist. Diese Zufuhrleitung kann mit Druckluft zum Auspressen des Gemisches beaufschlagt werden. Ein Nachteil dieses bekannten Systems besteht darin, daß beim Einleiten von Druckluft das flüssige Reinigungsmittel-gemisch zu einem Aerosol oder Nebel zerrissen werden kann. Damit wird die gleichmäßige Verteilung des flüssigen Anteils auf die Walzenoberfläche weitgehend unmöglich. Das ist insbesondere deshalb bedauerlich, weil die Steuerung der Flüssigkeitsabgabe mithilfe von Druckluft grundsätzlich vorteilhaft ist, da sie kostengünstige Lösungen ermöglicht.The US 5,303,652 A describes a cleaning system of the type mentioned with a spray bar, which has a larger number of spray nozzles and is connected to a supply line for a water-detergent mixture. This supply line can be acted upon with compressed air for squeezing the mixture. A disadvantage of this known system is that when introducing compressed air, the liquid cleaning agent mixture can be torn into an aerosol or mist. Thus, the uniform distribution of the liquid fraction on the roll surface is largely impossible. This is particularly regrettable because the control of the liquid delivery using compressed air is basically advantageous because it allows cost-effective solutions.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der obigen Art zu schaffen, die es ermöglicht, das Reinigungsmittel mithilfe von Druckluft aus der Sprühvorrichtung auszupressen, ohne dass es zu der nachteiligen Aerosol- oder Nebelbildung kommt.The invention has for its object to provide a device of the above type, which makes it possible to squeeze the detergent by means of compressed air from the spray device, without causing the adverse aerosol or mist formation.

Zur Lösung dieser Aufgabe ist die erfindungsgemäße Vorrichtung dadurch gekennzeichnet, dass in die Zufuhrleitung ein Sammelbehälter eingeschaltet ist und dass die Druckluftzufuhr auf der stromaufwärtigen Seite des Sammelbehälters erfolgt.To solve this problem, the device according to the invention is characterized in that in the supply line, a collecting container is turned on and that the compressed air supply takes place on the upstream side of the collecting container.

Die Angabe, dass der Sammelbehälter in die Zufuhrleitung "eingeschaltet" ist, soll zum Ausdruck bringen, dass die Zufuhrleitung mit einem Einlaß des Sammelbehälters verbunden ist und in ihrem weiteren Verlauf aus einem Auslaß des Sammelbehälters austritt.The statement that the sump is "on" in the supply line is intended to express that the supply line is connected to an inlet of the sump and exits in its further course from an outlet of the sump.

Der Sammelbehälter bildet also Teil der Zufuhrleitung. Der Sammelbehälter hat den Vorteil, dass beim Aufgeben von Druckluft ein geschlossener Flüssigkeitsblock in Richtung Sprühvorrichtung vorgeschoben werden kann und die Druckluft nicht in den zulaufenden Flüssigkeitsstrom eingeleitet wird.The collecting container thus forms part of the supply line. The collecting container has the advantage that when applying compressed air, a closed liquid block can be advanced in the direction of the spraying device and the compressed air is not introduced into the incoming liquid stream.

Naturgemäß ist es notwendig, den Sammelbehälter in möglichst geringer Entfernung vor der Sprühvorrichtung anzuordnen und auf diese Weise den erwähnten Flüssigkeitsblock möglichst geschlossen zu halten. Der Sammelbehälter kann auch unmittelbar an der Sprühvorrichtung angebracht sein.Naturally, it is necessary to arrange the collecting container in the shortest possible distance before the spraying device and to keep the said liquid block as closed as possible in this way. The collecting container can also be attached directly to the spraying device.

Vorzugsweise liegen Einlaß und Auslaß des Sammelbehälters höher als der Sammelbereich des Behälters, so dass angesammelte Flüssigkeit weder zur einen noch zur anderen Seite abfließen kann.Preferably, the inlet and outlet of the collecting container are higher than the collecting area of the container, so that accumulated liquid can flow to neither one side nor the other.

Dem Auslaß ist vorzugsweise ein Tauchrohr vorgeschaltet, so dass beim Einleiten von Druckluft in den Sammelbehälter eine geschlossene Wassersäule unmittelbar über das Tauchrohr und den weiteren Teil der Zufuhrleitung ausgepreßt werden kann.The outlet is preferably preceded by a dip tube, so that when injecting compressed air into the sump a closed water column can be squeezed directly through the dip tube and the other part of the supply line.

Gemäß einer anderen bevorzugten Ausführungsform wird der Sammelbehälter gebildet durch einen abgesenkten Abschnitt der Zufuhrleitung selbst. Der abgesenkte Abschnitt der Zufuhrleitung kann die Form einer Schlaufe oder Wendel aufweisen.According to another preferred embodiment, the collecting container is formed by a lowered portion of the supply line itself. The lowered portion of the supply line may be in the form of a loop or a helix.

In jedem Fall sollte das Volumen des Sammelbehälters so bemessen sein, dass das gesamte für den Sprühvorgang benötigte Reinigungsmittel aufgenommen werden kann. Da das Reinigungsmittel zu einem geschlossenen Volumen oder Block in geringer Entfernung vor der Sprühvorrichtung gesammelt wird, kommt es aufgrund der geringen Zeit der Einwirkung der Druckluft nicht zu einem nennenswerten Eindringen der Druckluft in das Flüssigkeitsvolumen. Das Reinigungsmittel wird gleichmäßig ohne Lufteinschlüsse vorgeschoben und aus den Düsen der Sprühvorrichtung gedrückt. Wegen der gleichmäßigen Benetzung der zu reinigenden Oberfläche kann die Menge des verwendeten Reinigungsmittels reduziert werden. Andererseits wird eine gleichmäßige Reinigungswirkung sichergestellt.In any case, the volume of the collection container should be such that the entire cleaning agent needed for the spraying process can be accommodated. Since the cleaning agent is collected in a closed volume or block at a short distance in front of the spraying device, due to the short time of the action of the compressed air, there is no significant penetration of the compressed air into the liquid volume. The cleaning agent is advanced evenly without air inclusions and pushed out of the nozzles of the spray device. Because of the uniform wetting of the surface to be cleaned, the amount of cleaning agent used can be reduced. On the other hand, a uniform cleaning effect is ensured.

Im folgenden werden bevorzugte Ausführungsbeispiele der Erfindung anhand der beigefügten Zeichnung näher erläutert.

Fig. 1
ist eine schematische Darstellung einer ersten Ausführungsform der Erfindung;
Fig. 2
zeigt diese erste Ausführungsform im Augenblick der Flüssigkeitsabgabe; und
Fig. 3
ist eine schematische Darstellung einer zweiten Ausführungsform der Erfindung.
In the following preferred embodiments of the invention will be described with reference to the accompanying drawings.
Fig. 1
is a schematic representation of a first embodiment of the invention;
Fig. 2
shows this first embodiment at the moment of liquid dispensing; and
Fig. 3
is a schematic representation of a second embodiment of the invention.

Die Darstellung der Fig. 1 ist auf die hier interessierenden Teile beschränkt. Gezeigt wird eine Sprühvorrichtung 10 mit einer Anzahl von Düsen 12. Die Sprühvorrichtung 10 wird durch eine Zufuhrleitung 14 mit einem Gemisch aus Wasser und Reinigungsmittel versorgt. Rechts von der Sprühvorrichtung 10 würde sich in der Praxis eine zu besprühende Oberfläche, beispielsweise eine Druckwalze befinden.The illustration of Fig. 1 is limited to the parts of interest here. Shown is a spray device 10 with a number of nozzles 12. The spray device 10 is supplied through a supply line 14 with a mixture of water and detergent. To the right of the spraying device 10 would be in practice a surface to be sprayed, for example a pressure roller.

In die Zufuhrleitung 14 ist ein Sammelbehälter 16 eingeschaltet, der bei der ersten Ausführungsform gebildet wird durch einen Leitungsabschnitt der Zufuhrleitung 14. Dieser Leitungsabschnitt liegt unterhalb der Partie der Zufuhrleitung 14, in die der Sammelbehälter 16 integriert ist. Daher kann der Sammelbehälter das Reinigungsmittel aufnehmen und ansammeln, ohne dass es über die Zufuhrleitung 14 abläuft.In the supply line 14, a collecting container 16 is turned on, which is formed in the first embodiment by a line section of the supply line 14. This line section is located below the portion of the supply line 14, in which the collecting container 16 is integrated. Therefore, the collecting container can receive and accumulate the cleaning agent without draining via the supply line 14.

Bei der dargestellten Ausführungsform hat der abgesenkte Abschnitt der Zufuhrleitung 14 die Form einer Wendel oder einer Schlaufe 18. Die Zufuhrleitung ist im Bereich des Sammelbehälters kreisförmig gebogen. In diesen zu einer Schlaufe 18 gebogenen Abschnitt treten Speiseleitungen 20,22 für Wasser und Reinigungsmittel ein.In the illustrated embodiment, the depressed portion of the supply conduit 14 is in the form of a coil or loop 18. The supply conduit is circularly bent in the region of the collection container. In this section bent into a loop 18, feed lines 20, 22 for water and cleaning agent enter.

Gemäß Fig. 1 ist die Schlaufe zu etwa 2/3 mit Flüssigkeit gefüllt. Wenn jetzt in Richtung des Pfeils 24 Druckluft aufgegeben wird, wird die in der Schlaufe 18 gesammelte Wassersäule als zusammenhängender Block in Richtung der Sprühvorrichtung 10 und der Düsen 12 gedrückt. Da sich der Sammelbehälter 16 unmittelbar vor der Sprühvorrichtung 10 befindet, wird die erwähnte Wassersäule nur wenig durch die Druckluft zerrissen.According to Fig. 1, the loop is filled to about 2/3 with liquid. When compressed air is now supplied in the direction of the arrow 24, the water column collected in the loop 18 is pressed as a continuous block in the direction of the spray device 10 and the nozzles 12. Since the collection container 16 is located immediately in front of the spray device 10, the mentioned water column is only slightly torn by the compressed air.

Fig. 2 veranschaulicht einen Sprühvorgang. Eine Folge von nicht bezeichneten Pfeilen in der Zufuhrleitung 14 und der Schlaufe 18 veranschaulicht die Bewegung der in der Schlaufe 18 enthaltenen Wassersäule bzw. der Druckluft.Fig. 2 illustrates a spraying process. A sequence of unsigned arrows in the supply line 14 and the loop 18 illustrates the movement of the water column or compressed air contained in the loop 18.

Fig. 3 zeigt eine zweite Ausführungsform der Erfindung in schematischer Ansicht. Der Sammelbehälter ist in diesem Fall mit 26 bezeichnet. Es handelt sich um einen Behälter mit beliebiger Geometrie. Der gezeigte Behälter 26 ist beispielsweise zylindrisch. Dieser Behälter wird mit seinem größeren Teil tiefer angeordnet als die Zufuhrleitung 14, so dass die angesammelte Flüssigkeit nicht über die Zufuhrleitung 14 abströmen kann. Die Zufuhrleitung 14 ist unterbrochen und über einen Einlaß 28 sowie einen Auslaß 30 mit dem Sammelbehälter 26 verbunden. Über Speiseleitungen 32,34 können Wasser und Reinigungsmittel eingeleitet werden. Druckluft kann auch in diesem Fall über den stromabwärtigen Bereich der Zufuhrleitung 14 zugeführt werden, gegebenenfalls aber auch über einen gesonderten Anschluß am Sammelbehälter 26.Fig. 3 shows a second embodiment of the invention in a schematic view. The collecting container is designated in this case with 26. It is a container of any geometry. The container 26 shown is cylindrical, for example. This container is arranged with its larger part lower than the supply line 14, so that the accumulated liquid can not flow off via the supply line 14. The supply line 14 is interrupted and connected via an inlet 28 and an outlet 30 to the sump 26. About feed lines 32,34 water and cleaning agents can be initiated. Compressed air can also be supplied in this case via the downstream region of the supply line 14, but optionally also via a separate connection to the collecting container 26th

Dem Auslaß 30 bzw. dem stromabwärtigen Abschnitt der Zufuhrleitung 14 ist ein Tauchrohr 36 vorgeschaltet, das bis unter den nicht bezeichneten Flüssigkeitsspiegel im Sammelbehälter 26 reicht. Wenn bei dieser Konstruktion ein Druckluftpolster auf den Wasserspiegel im Sammelbehälter 26 aufgebracht wird, wird das Gemisch aus Wasser und Reinigungsmittel durch das Tauchrohr 36 und den stromabwärtigen Abschnitt der Zufuhrleitung 14 in die Sprühvorrichtung 10 gedrückt.The outlet 30 and the downstream portion of the supply line 14 is preceded by a dip tube 36, which extends to below the unnamed liquid level in the reservoir 26. With this construction, when a compressed air cushion is applied to the water level in the sump 26, the mixture of water and detergent is forced into the spray device 10 through the dip tube 36 and the downstream portion of the supply line 14.

Claims (5)

  1. Device for cleaning surfaces of cylinders in printing machines, with supply means (20, 22, 32, 34) for introducing water and/or detergent into a common supply line (14) to a spray device (10) for spraying water, detergent or a water-detergent mixture onto a surface of a cylinder, with a compressed air source for compressed air for forcing the detergent out of the spray device (10), which is connected to the supply line, characterised in that a collecting container (16, 18, 26) is connected into the supply line (14), and that the compressed air is supplied on the upstream side of the collecting container (16; 18; 26).
  2. Device according to Claim 1, characterised in that the collecting region of the collecting container (16, 18, 26) lies below the mouth of the supply line (14) and below the outlet (30) of the collecting container (16; 18; 26).
  3. Device according to Claim 1 or 2, characterised in that the collecting container (26) comprises an inlet and an outlet (28, 30), and that an immersion pipe (36) is connected upstream of the outlet.
  4. Device according to Claim 1, characterised in that the collecting container (16, 18, 26) is formed by a lowered section of the supply line (14).
  5. Device according to Claim 4, characterised in that the lowered section of the supply line (14) is formed as a loop (18).
EP20050019600 2004-10-01 2005-09-09 Device for cleaning surfaces of cylinders in a printing machine Revoked EP1642717B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200410047935 DE102004047935B3 (en) 2004-10-01 2004-10-01 Assembly to clean surface of printing press drum has compressed air supply upstream of liquid reservoir

Publications (2)

Publication Number Publication Date
EP1642717A1 EP1642717A1 (en) 2006-04-05
EP1642717B1 true EP1642717B1 (en) 2007-11-14

Family

ID=35500493

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20050019600 Revoked EP1642717B1 (en) 2004-10-01 2005-09-09 Device for cleaning surfaces of cylinders in a printing machine

Country Status (2)

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DE (2) DE102004047935B3 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0025806B1 (en) * 1979-09-25 1983-05-25 Baldwin-Gegenheimer GmbH Device for cleaning a blanket
US4686902A (en) * 1986-10-31 1987-08-18 Precision Engineered Systems Inc. Automatic blanket wash system
US5303652A (en) * 1992-02-13 1994-04-19 Baldwin Technology Corporation Spray blanket cleaning system
GB2266269B (en) * 1992-04-25 1995-08-02 Printing Press Services Limite Improvements in or relating to printing machines
DE4216423A1 (en) * 1992-05-18 1993-11-25 Baldwin Gegenheimer Gmbh Printing unit washing device for printing machines
DE202004001174U1 (en) * 2004-01-27 2004-04-08 Man Roland Druckmaschinen Ag Supply device for a cleaning device in a processing machine

Also Published As

Publication number Publication date
DE102004047935B3 (en) 2006-01-26
EP1642717A1 (en) 2006-04-05
DE502005001952D1 (en) 2007-12-27

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