EP0949074A1 - Ink rail seal - Google Patents

Ink rail seal Download PDF

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Publication number
EP0949074A1
EP0949074A1 EP98101431A EP98101431A EP0949074A1 EP 0949074 A1 EP0949074 A1 EP 0949074A1 EP 98101431 A EP98101431 A EP 98101431A EP 98101431 A EP98101431 A EP 98101431A EP 0949074 A1 EP0949074 A1 EP 0949074A1
Authority
EP
European Patent Office
Prior art keywords
strip
doctor blade
doctor
chamber
seal
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.)
Granted
Application number
EP98101431A
Other languages
German (de)
French (fr)
Other versions
EP0949074B1 (en
Inventor
Michael Schmitt
Lars Grüter
Wilfried Dr. Kolbe
Klaus Schirrich
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fischer and Krecke GmbH and Co KG
Original Assignee
Fischer and Krecke GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fischer and Krecke GmbH and Co KG filed Critical Fischer and Krecke GmbH and Co KG
Priority to DE59800788T priority Critical patent/DE59800788D1/en
Priority to EP98101431A priority patent/EP0949074B1/en
Priority to US09/215,972 priority patent/US6016748A/en
Priority to JP11015356A priority patent/JPH11254650A/en
Publication of EP0949074A1 publication Critical patent/EP0949074A1/en
Application granted granted Critical
Publication of EP0949074B1 publication Critical patent/EP0949074B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/027—Ink rail devices for inking ink rollers

Definitions

  • the invention relates to a seal for a chambered doctor blade of a printing machine.
  • Printing machines for example flexographic printing machines, have an application roller on that for applying the printing ink to the actual printing cylinder serves and which in turn is colored with the help of a doctor blade.
  • the chambered doctor blade has a housing that extends over the entire length of the Application roller extends, and carries at least two doctor blades that cover the perimeter scrape off the rotating applicator roller and together with the housing the chamber doctor blade and the one between the doctor blades Limit an ink chamber circumferential surface of the application roller.
  • the application roller usually has a regular grid of flat ones on its surface Wells that are filled with printing ink when the relevant one Circumferential portion of the applicator roller moved through the ink chamber, and the then deliver the printing ink so recorded to the printing cylinder.
  • the seals that form the subject of the following invention serve to close the ink chamber at the ends.
  • Conventional seals of this type have a block of flexible Material, for example made of felt, between the two doctor blades is inserted into the chamber of the chamber doctor blade and close to the two doctor blades and on the intermediate portion of the surface of the Application roller is applied.
  • the flexibility of the sealing block enables a good seal on the circumference of the application roller and allows an increasing stronger positioning of the doctor blade on the applicator roller accordingly the progressive wear of the doctor blades.
  • the material of the sealing block must be meet various requirements that have so far not been satisfactory to bring them into harmony. On the one hand, it must be a reliable one and ensure permanent sealing of the ink chamber, on the other hand, should in terms of the frictional contact between the sealing block and the rotating applicator roller have the highest possible abrasion resistance, so that the sealing block does not work off too quickly. About that In addition, the material must be compared to the printing inks and Solvents are chemically and mechanically resistant. The liquids that can come into contact with the surface of the sealing block on the one hand lead to swelling and softening of the material and can, on the other hand, after drying the liquid to a Cause embrittlement of the material. In both cases, there is ultimately one increased wear on the sealing blocks.
  • the object of the invention is to provide a seal for the chamber doctor blade To create printing machine that has a higher wear resistance and a permanent and reliable seal of the ink chamber enables.
  • This object is achieved in that the application roller facing surface of the sealing block with a strip elastic material is covered, which is harder than the material of the sealing block.
  • This strip prevents direct contact between the compliant Material of the sealing block and the surface of the application roller.
  • the application roller is only with the strip of relatively hard material in rubbing contact, which has a high abrasion resistance. Because this streak on the other hand, however, is elastic and due to the resilient material of the Sealing block evenly against the circumference of the application roller is pressed, a reliable seal can still be achieved.
  • the material of the actual sealing block can be regardless of the Abrasion resistance in terms of chemical resistance and in terms of be optimized for its hardness.
  • For the covering strip can any sufficiently hard and elastic material, e.g. metal, used compared to printing inks and solvents is stable. The necessary resilience can then be determined by suitable ones Select the thickness of this strip easily.
  • the covering strip can be glued, vulcanized or the like be attached directly to the sealing block.
  • The is preferred However, strips detachably on the doctor blade or the housing of the chamber doctor attached.
  • the elastic strip simply with its rear end in the direction of rotation of the application roller into one formed between the doctor blade and the housing of the chamber doctor Pocket inserted while the opposite end of the strip is loose is. Since the frictional forces between the application roller and the strip in Direction towards the attached end of the strip that is inserted into the pocket the strip is not pulled out of the pocket.
  • the opposite free end of the strip can either be under the other doctor knife concern or between the doctor blade and the scope of the Applicator roller to be guided outside.
  • the doctor blade 12 has Housing 14 on which in a known manner, for example with the help of shown clamping devices, two roof-shaped doctor blades 16, 18 are attached, with their free ends on the circumference of the applicator roller 10 concerns.
  • the two doctor blades 16, 18 and the section of the Circumferential surface of the application roller 10 is limited to an ink chamber 20 extends over the entire length of the application roller 10 and at both ends is completed by seals 22.
  • FIG 2 one end of the applicator roller 10 and the chamber doctor blade 12 with the corresponding seal 22 shown.
  • the application roller 10 has one Middle section 24 and a narrow end section 26 at each end.
  • the peripheral surface of the applicator roller is one Cup grid made of flat cups 28, while the End portions 26 against which the seals 22 abut a smooth Have surface.
  • the ink chamber 20 is filled with printing ink filled, and the application roller 10 rotates clockwise in Figure 1.
  • the peripheral surface of the applicator roller 10 wetted in the middle section 24 with printing ink.
  • excess ink is stripped off again, so that only a certain amount of ink in the Cup 28 remains, which then to a pressure cylinder, not shown is handed over.
  • the seal 22 has a seal block 30 made of resilient material on, for example made of felt or one compared to printing inks and Solvent resistant soft, rubbery porous or not porous material.
  • the sealing block 30 is in a groove 32 of the housing 14 held and forms one to the doctor blade 16, 18 and between them included circumferential section of the applicator roller 10 adapted contour, so that it completely closes the ink chamber 20 at the end.
  • the sealing block 30, however, is not directly on the circumference of the application roller 10 on, but it is through on its surface facing the applicator roller covered a thin, elastic strip 34 of metal, the width of which is greater than that of the sealing block 30.
  • This strip 34 is by the compliant material of the sealing block 30 in full contact with the applicator roller 10 held and stands with the smooth end portion 26 of the applicator roller in sliding contact. In this way it becomes excessive Wear of the sealing block 30 avoided without the sealing effect is affected.
  • the strip 34 is with its in the direction of rotation Applicator roller 10 attached to the chambered doctor blade 12 at the rear end.
  • the purpose is to end the strip 34 in a between the doctor blade 16 (left in Figure 1) and the housing 14 formed pocket 36 inserted.
  • the acting between the applicator roller 10 and the strip 34 Frictional forces tend to counter this streak to the left in Figure 1 to press the doctor blade 16 and the bottom of the pocket 36 so that stable attachment of the strip 34 is achieved in a simple manner.
  • the strip 34 is bent relatively sharply or angled so that there is no leak.
  • the opposite The end of the strip 34 is also angled or bent and at the embodiment of Figure 1 loosely inserted under the doctor blade 18.
  • FIG. 3 shows a modified embodiment in which the strip 34 with its rear end in any suitable manner on the doctor blade 16 is attached while the front end between the edge of the doctor knife 18 and the scope of the applicator roller 10 emerges and freely from the Farmer chamber 20 protrudes.
  • the end portion of the doctor blade 18 m ⁇ ß covered by the strip 34 necessarily form a gap with the circumference of the application roller 10, whose width corresponds to the material thickness of the strip 34.
  • the doctor blade 18 against wear protected, so that wear of the doctor blade essentially only in the length range that occurs at the central portion 24 of the applicator roller is present. This different wear of the doctor blade can also be compensated for by elastic yielding of the doctor blade.

Abstract

The seal has a sealing block (30) of yielding material, fitted at one end of the chamber doctor between two doctor knives (16,18), enclosing an ink chamber between the circumference of an application roll (10), the doctor knives and their casing (14). A strip (34) of elastic material, harder than that of the sealing block, sits on the surface facing the application roll.

Description

Die Erfindung betrifft eine Dichtung für eine Kammerrakel einer Druckmaschine.The invention relates to a seal for a chambered doctor blade of a printing machine.

Druckmaschinen, beispielsweise Flexodruckmaschinen, weisen eine Auftragwalze auf, die zum Auftragen der Druckfarbe auf den eigentlichen Druckzylinder dient und die ihrerseits mit Hilfe einer Kammerrakel eingefärbt wird. Die Kammerrakel weist ein Gehäuse auf, das sich über die gesamte Länge der Auftragwalze erstreckt, und trägt mindestens zwei Rakelmesser, die den Umfang der rotierenden Auftragwalze abrakeln und zusammen mit dem Gehäuse der Kammerrakel und der zwischen den Rakelmessern liegenden Umfangsfläche der Auftragwalze eine Farbkammer begrenzen. Die Auftragwalze weist an ihrer Oberfläche zumeist ein regelmäßiges Raster aus flachen Näpfchen auf, die mit Drückfarbe gefüllt werden, wenn sich der betreffende Umfangsabschnitt der Auftragwalze durch die Farbkammer bewegt, und die dann die so aufgenommene Drückfarbe an den Drückzylinder abgeben.Printing machines, for example flexographic printing machines, have an application roller on that for applying the printing ink to the actual printing cylinder serves and which in turn is colored with the help of a doctor blade. The chambered doctor blade has a housing that extends over the entire length of the Application roller extends, and carries at least two doctor blades that cover the perimeter scrape off the rotating applicator roller and together with the housing the chamber doctor blade and the one between the doctor blades Limit an ink chamber circumferential surface of the application roller. The application roller usually has a regular grid of flat ones on its surface Wells that are filled with printing ink when the relevant one Circumferential portion of the applicator roller moved through the ink chamber, and the then deliver the printing ink so recorded to the printing cylinder.

Die Dichtungen, die den Gegenstand der folgenden Erfindung bilden, dienen dazu, die Farbkammer an den Enden abzuschließen.The seals that form the subject of the following invention serve to close the ink chamber at the ends.

Herkömmliche Dichtungen dieser Art weisen einen Block aus nachgiebigem Material, beispielsweise aus Filz auf, der zwischen den beiden Rakelmessern in das Gehäuse der Kammerrakel eingesetzt ist und eng an den beiden Rakelmessern sowie an dem dazwischenliegenden Abschnitt der Oberfläche der Auftragwalze anliegt. Die Nachgiebigkeit des Dichtungsblockes ermöglicht eine gute Abdichtung am Umfang der Auftragwalze und gestattet ein zunehmend stärkeres Anstellen der Kammerrakel an die Auftragwalze entsprechend dem fortschreitenden Verschleiß der Rakelmesser.Conventional seals of this type have a block of flexible Material, for example made of felt, between the two doctor blades is inserted into the chamber of the chamber doctor blade and close to the two doctor blades and on the intermediate portion of the surface of the Application roller is applied. The flexibility of the sealing block enables a good seal on the circumference of the application roller and allows an increasing stronger positioning of the doctor blade on the applicator roller accordingly the progressive wear of the doctor blades.

Bei den herkömmlichen Dichtungen muß das Material des Dichtungsblockes verschiedene Anforderungen erfüllen, die sich bisher nicht zufriedenstellend miteinander in Einklang bringen lassen. Es muß einerseits eine zuverlässige und dauerhafte Abdichtung der Farbkammer gewährleisten, sollte jedoch andererseits im Hinblick auf die Reibberührung zwischen dem Dichtungsblock und der rotierenden Auftragwalze eine möglichst hohe Abriebfestigkeit aufweisen, damit der Dichtungsblock sich nicht zu schnell abarbeitet. Darüber hinaus muß das Material gegenüber den eingesetzten Druckfarben und Lösungsmitteln chemisch und mechanisch beständig sein. Die Flüssigkeiten, die mit der Oberfläche des Dichtungsblockes in Berührung kommen, können einerseits zu einem Quellen und Aufweichen des Materials führen und können andererseits nach dem Eintrocknen der Flüssigkeit zu einer Versprödung des Materials führen. In beiden Fällen kommt es letztlich zu einem erhöhten Verschleiß an den Dichtungsblöcken.With conventional seals, the material of the sealing block must be meet various requirements that have so far not been satisfactory to bring them into harmony. On the one hand, it must be a reliable one and ensure permanent sealing of the ink chamber, on the other hand, should in terms of the frictional contact between the sealing block and the rotating applicator roller have the highest possible abrasion resistance, so that the sealing block does not work off too quickly. About that In addition, the material must be compared to the printing inks and Solvents are chemically and mechanically resistant. The liquids that can come into contact with the surface of the sealing block on the one hand lead to swelling and softening of the material and can, on the other hand, after drying the liquid to a Cause embrittlement of the material. In both cases, there is ultimately one increased wear on the sealing blocks.

Aufgabe der Erfindung ist es, eine Dichtung für die Kammerrakel einer Druckmaschine zu schaffen, die eine höhere Verschleißfestigkeit aufweist und eine dauerhafte und zuverlässige Abdichtung der Farbkammer ermöglicht.The object of the invention is to provide a seal for the chamber doctor blade To create printing machine that has a higher wear resistance and a permanent and reliable seal of the ink chamber enables.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die der Auftragwalze zugewandte Oberfläche des Dichtungsblockes mit einem Streifen aus elastischem Material bedeckt ist, das härter ist als das Material des Dichtungsblockes.This object is achieved in that the application roller facing surface of the sealing block with a strip elastic material is covered, which is harder than the material of the sealing block.

Dieser Streifen verhindert eine unmittelbare Berührung zwischen dem nachgiebigen Material des Dichtungsblockes und der Oberfläche der Auftragwalze. Die Auftragwalze steht lediglich mit dem Streifen aus relativ hartem Material in Reibberührung, der eine hohe Abriebfestigkeit aufweist. Da dieser Streifen andererseits jedoch elastisch ist und durch das nachgiebige Material des Dichtungsblockes gleichmäßig gegen den Umfang der Auftragwalze angedrückt wird, läßt sich dennoch eine zuverlässige Abdichtung erreichen. Das Material des eigentlichen Dichtungsblockes kann ohne Rücksicht auf die Abriebfestigkeit im Hinblick auf die chemische Beständigkeit und im Hinblick auf seine Härte optimiert werden. Für den abdeckenden Streifen kann irgendein genügend hartes und elastisches Material, beispielsweise Metall, verwendet werden, das gegenüber den Druckfarben und Lösungsmitteln beständig ist. Die notwendige Nachgiebigkeit läßt sich dann durch geeignete Wahl der Dicke dieses Streifens problemlos erreichen.This strip prevents direct contact between the compliant Material of the sealing block and the surface of the application roller. The application roller is only with the strip of relatively hard material in rubbing contact, which has a high abrasion resistance. Because this streak on the other hand, however, is elastic and due to the resilient material of the Sealing block evenly against the circumference of the application roller is pressed, a reliable seal can still be achieved. The material of the actual sealing block can be regardless of the Abrasion resistance in terms of chemical resistance and in terms of be optimized for its hardness. For the covering strip can any sufficiently hard and elastic material, e.g. metal, used compared to printing inks and solvents is stable. The necessary resilience can then be determined by suitable ones Select the thickness of this strip easily.

Vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen.Advantageous embodiments of the invention result from the Subclaims.

Der abdeckende Streifen kann durch Kleben, Anvulkanisieren oder dergleichen unmittelbar an dem Dichtungsblock angebracht sein. Bevorzugt ist der Streifen jedoch lösbar an dem Rakelmesser oder dem Gehäuse der Kammerrakel befestigt.The covering strip can be glued, vulcanized or the like be attached directly to the sealing block. The is preferred However, strips detachably on the doctor blade or the housing of the chamber doctor attached.

In einer besonders bevorzugten Ausführungsform ist der elastische Streifen einfach mit seinem in Drehrichtung der Auftragwalze hinteren Ende in eine zwischen dem Rakelmesser und dem Gehäuse der Kammerrakel gebildete Tasche eingesteckt, während das entgegengesetzte Ende des Streifens lose ist. Da die Reibungskräfte zwischen der Auftragwalze und dem Streifen in Richtung auf das befestigte, in die Tasche eingesteckte Ende des Streifens wirken, wird der Streifen nicht aus der Tasche herausgezogen. Das entgegengesetzte freie Ende des Streifens kann entweder unter dem anderen Rakelmesser anliegen oder auch zwischen dem Rakelmesser und dem Umfang der Auftragwalze nach außen geführt sein.In a particularly preferred embodiment, the elastic strip simply with its rear end in the direction of rotation of the application roller into one formed between the doctor blade and the housing of the chamber doctor Pocket inserted while the opposite end of the strip is loose is. Since the frictional forces between the application roller and the strip in Direction towards the attached end of the strip that is inserted into the pocket the strip is not pulled out of the pocket. The opposite free end of the strip can either be under the other doctor knife concern or between the doctor blade and the scope of the Applicator roller to be guided outside.

Im folgenden werden bevorzugte Ausführungsbeispiele anhand der Zeichnung näher erläutert.The following are preferred exemplary embodiments with reference to the drawing explained in more detail.

Es zeigen:

Figur 1
einen schematischen Schnitt durch eine Auftragwalze und eine Kammerrakel mit einer erfindungsgemäßen Dichtung;
Figur 2
einen schematischen Längsschnitt entsprechend der Linie II-II in Figur 1; und
Figur 3
einen vergrößerten Teilschnitt entsprechend Figur 1, jedoch für ein anderes Ausführungsbeispiel der Erfindung.
Show it:
Figure 1
a schematic section through an applicator roller and a doctor blade with a seal according to the invention;
Figure 2
a schematic longitudinal section along the line II-II in Figure 1; and
Figure 3
an enlarged partial section corresponding to Figure 1, but for another embodiment of the invention.

In Figur 1 sind eine Auftragwalze 10 und eine an den Umfang dieser Auftragwalze angestellte Kammerrakel 12 dargestellt. Die Kammerrakel 12 weist ein Gehäuse 14 auf, an dem in bekannter Weise, beispielsweise mit Hilfe nicht gezeigter Klemmeinrichtungen, zwei dachförmig angeordnete Rakelmesser 16, 18 befestigt sind, die mit ihren freien Enden am Umfang der Auftragwalze 10 anliegen. Durch das Gehäuse 14 der Kammerrakel, die beiden Rakelmesser 16, 18 und den zwischen ihnen eingeschlossenen Abschnitt der Umgangsfläche der Auftragwalze 10 wird eine Farbkammer 20 begrenzt, die sich über die gesamte Länge der Auftragwalze 10 erstreckt und an beiden Enden durch Dichtungen 22 abgeschlossen ist.In Figure 1, an applicator roller 10 and one on the circumference of this applicator roller employed chamber doctor blade 12 shown. The doctor blade 12 has Housing 14 on which in a known manner, for example with the help of shown clamping devices, two roof-shaped doctor blades 16, 18 are attached, with their free ends on the circumference of the applicator roller 10 concerns. Through the housing 14 of the chamber doctor blade, the two doctor blades 16, 18 and the section of the Circumferential surface of the application roller 10 is limited to an ink chamber 20 extends over the entire length of the application roller 10 and at both ends is completed by seals 22.

In Figur 2 ist ein Ende der Auftragwalze 10 und der Kammerrakel 12 mit der entsprechenden Dichtung 22 dargestellt. Die Auftragwalze 10 weist einen Mittelabschnitt 24 und an jedem Ende einen schmalen Endabschnitt 26 auf. In dem Mittelabschnitt 24 ist die Umfangsfläche der Auftragwalze mit einem Näpfchenraster aus flachen Näpfchen 28 versehen, während die Endabschnitte 26, an denen die Dichtungen 22 anliegen, eine glatte Oberfläche haben.In Figure 2, one end of the applicator roller 10 and the chamber doctor blade 12 with the corresponding seal 22 shown. The application roller 10 has one Middle section 24 and a narrow end section 26 at each end. In the central portion 24, the peripheral surface of the applicator roller is one Cup grid made of flat cups 28, while the End portions 26 against which the seals 22 abut a smooth Have surface.

Während des Betriebs der Druckmaschine ist die Farbkammer 20 mit Druckfarbe gefüllt, und die Auftragwalze 10 rotiert im Uhrzeigersinn in Figur 1. Beim Durchlauf durch die Farbkammer 20 wird die Umfangsfläche der Auftragwalze 10 im Mittelabschnitt 24 mit Druckfarbe benetzt. Durch das stromabwärtige Rakelmesser 16 wird überschüssige Druckfarbe wieder abgestreift, so daß lediglich eine bestimmte Menge an Druckfarbe in den Näpfchen 28 zurückbleibt, die dann an einen nicht gezeigten Druckzylinder übergeben wird.During the operation of the printing press, the ink chamber 20 is filled with printing ink filled, and the application roller 10 rotates clockwise in Figure 1. When passing through the ink chamber 20, the peripheral surface of the applicator roller 10 wetted in the middle section 24 with printing ink. By the downstream doctor blade 16, excess ink is stripped off again, so that only a certain amount of ink in the Cup 28 remains, which then to a pressure cylinder, not shown is handed over.

Die Dichtung 22 weist einen Dichtungsblock 30 aus nachgiebigem Material auf, beispielsweise aus Filz oder aus einem gegenüber Druckfarben und Lösungsmitteln beständigen weichen, gummielastischen porösen oder nicht porösen Material. Der Dichtungsblock 30 ist in einer Nut 32 des Gehäuses 14 gehalten und bildet eine an die Rakelmesser 16, 18 und den zwischen ihnen eingeschlossenen Umfangsabschnitt der Auftragwalze 10 angepaßte Kontur, so daß sie die Farbkammer 20 am Ende vollständig abschließt. Der Dichtungsblock 30 liegt jedoch nicht unmittelbar am Umfang der Auftragwalze 10 an, sondern er ist an seiner der Auftragwalze zugewandten Oberfläche durch einen dünnen, elastischen Streifen 34 aus Metall abgedeckt, dessen Breite größer ist als die des Dichtungsblockes 30. Dieser Streifen 34 wird durch das nachgiebige Material des Dichtungsblockes 30 in satter Anlage an der Auftragwalze 10 gehalten und steht mit dem glatten Endabschnitt 26 der Auftragwalze in Gleitberührung. Auf diese Weise wird ein übermäßiger Verschleiß des Dichtungsblockes 30 vermieden, ohne daß die Dichtwirkung beeinträchtigt wird. The seal 22 has a seal block 30 made of resilient material on, for example made of felt or one compared to printing inks and Solvent resistant soft, rubbery porous or not porous material. The sealing block 30 is in a groove 32 of the housing 14 held and forms one to the doctor blade 16, 18 and between them included circumferential section of the applicator roller 10 adapted contour, so that it completely closes the ink chamber 20 at the end. The sealing block 30, however, is not directly on the circumference of the application roller 10 on, but it is through on its surface facing the applicator roller covered a thin, elastic strip 34 of metal, the width of which is greater than that of the sealing block 30. This strip 34 is by the compliant material of the sealing block 30 in full contact with the applicator roller 10 held and stands with the smooth end portion 26 of the applicator roller in sliding contact. In this way it becomes excessive Wear of the sealing block 30 avoided without the sealing effect is affected.

Im gezeigten Beispiel ist der Streifen 34 mit seinem in Rotationsrichtung der Auftragwalze 10 hinteren Ende an der Kammerrakel 12 befestigt. Zu diesem Zweck ist das Ende des Streifens 34 in eine zwischen dem Rakelmesser 16 (links in Figur 1) und dem Gehäuse 14 gebildete Tasche 36 eingesteckt. Die zwischen der Auftragwalze 10 und dem Streifen 34 wirkenden Reibungskräfte haben die Tendenz, diesen Streifen nach links in Figur 1 gegen das Rakelmesser 16 und den Boden der Tasche 36 zu drücken, so daß auf einfache Weise eine stabile Befestigung des Streifens 34 erreicht wird. Am freien Ende des Rakelmessers 16 ist der Streifen 34 relativ scharf abgebogen oder abgewinkelt, so daß dort keine Leckstelle entsteht. Das entgegengesetzte Ende des Streifens 34 ist ebenfalls abgewinkelt oder abgebogen und bei der Ausführungsform nach Figur 1 lose unter das Rakelmesser 18 gesteckt.In the example shown, the strip 34 is with its in the direction of rotation Applicator roller 10 attached to the chambered doctor blade 12 at the rear end. To this The purpose is to end the strip 34 in a between the doctor blade 16 (left in Figure 1) and the housing 14 formed pocket 36 inserted. The acting between the applicator roller 10 and the strip 34 Frictional forces tend to counter this streak to the left in Figure 1 to press the doctor blade 16 and the bottom of the pocket 36 so that stable attachment of the strip 34 is achieved in a simple manner. At the the free end of the doctor blade 16, the strip 34 is bent relatively sharply or angled so that there is no leak. The opposite The end of the strip 34 is also angled or bent and at the embodiment of Figure 1 loosely inserted under the doctor blade 18.

Figur 3 zeigt ein abgewandeltes Ausführungsbeispiel, bei dem der Streifen 34 mit seinem hinteren Ende auf irgendeine geeignete Weise an dem Rakelmesser 16 befestigt ist, während das vordere Ende zwischen der Kante des Rakelmessers 18 und dem Umfang der Auftragwalze 10 austritt und frei aus der Farkammer 20 herausragt. Bei dieser Ausführungsform können Längenänderungen auf Grund von Wärmeausdehnung des Streifens 34, Abnutzung der Rakelmesser und dergleichen besonders gut ausgeglichen werden.FIG. 3 shows a modified embodiment in which the strip 34 with its rear end in any suitable manner on the doctor blade 16 is attached while the front end between the edge of the doctor knife 18 and the scope of the applicator roller 10 emerges and freely from the Farmer chamber 20 protrudes. In this embodiment, you can Changes in length due to thermal expansion of the strip 34, wear the doctor blade and the like can be particularly well balanced.

Der von dem Streifen 34 überdeckte Endabschnitt des Rakelmessers 18 mµß notwendigerweise mit dem Umfang der Auftragwalze 10 einen Spalt bilden, dessen Breite der Materialdicke des Streifens 34 entspricht. Auf dem Mittelabschnitt 24 der Auftragwalze 10 muß das Rakelmesser 18 aber am Umfang der Auftragwalze anliegen. Da das Rakelmesser 18 mit dem Umfang der Auftragwalze 10 einen spitzen Winkel bildet, kann es in seinem Endabschnitt auf Grund der Andruckkraft, mit der die Kammerrakel gegen die Auftragwalze angestellt wird, elastisch nachgeben, um den Spalt für den Durchtritt des Streifens 34 zu bilden, während das Rakelmesser auf dem übrigen Teil seiner Länge die gewünschte Rakelwirkung entfaltet. In dem von dem Streifen 34 überdeckten Endabschnitt wird das Rakelmesser 18 gegen Verschleiß geschützt, so daß eine Abnutzung des Rakelmessers im wesentlichen nur in dem Längenbereich erfolgt, der an den Mittelabschnitt 24 der Auftragwalze anliegt. Auch diese unterschiedliche Abnutzung des Rakelmessers kann aber durch elastisches Nachgeben des Rakelmessers ausgeglichen werden. The end portion of the doctor blade 18 mμß covered by the strip 34 necessarily form a gap with the circumference of the application roller 10, whose width corresponds to the material thickness of the strip 34. On the middle section 24 of the applicator roller 10 but the doctor blade 18 on the circumference of the application roller. Since the doctor blade 18 with the scope of Applicator roller 10 forms an acute angle, it can in its end portion due to the pressing force with which the doctor blade against the application roller is made to give way elastically to the gap for passage of the strip 34 to form while the doctor blade on the rest of the part the desired squeegee effect along its length. In the one from the strip 34 covered end portion, the doctor blade 18 against wear protected, so that wear of the doctor blade essentially only in the length range that occurs at the central portion 24 of the applicator roller is present. This different wear of the doctor blade can also be compensated for by elastic yielding of the doctor blade.

Wahlweise kann an der Kante des Rakelmessers 18 in den beiden Endabschnitten auch jeweils eine flache Ausnehmung für den Streifen 34 vorgesehen sein.Optionally, on the edge of the doctor blade 18 in the two End sections also each have a flat recess for the strip 34 be.

Claims (8)

Dichtung für eine Kammerrakel (12) einer Druckmaschine, mit einem Dichtungsblock (30) aus nachgiebigem Material, der an einem Ende der Kammerrakel zwischen zwei Rakelmessern (16, 18) eingesetzt ist und eine durch den Umfang einer Auftragwalze (10) der Druckmaschine, die Rakelmesser und ein Gehäuse (14) der Kammerrakel begrenzte Farbkammer (20) abschließt, dadurch gekennzeichnet, daß die der Auftragwalze (10) zugewandte Oberfläche des Dichtungsblockes (30) mit einem Streifen (34) aus elastischem Material bedeckt ist, das härter ist als das Material des Dichtungsblockes.Seal for a chambered doctor blade (12) of a printing press, with a sealing block (30) made of flexible material, which is inserted at one end of the chambered doctor blade between two doctor blades (16, 18) and one through the circumference of an application roller (10) of the printing press Doctor knife and a housing (14) of the chamber-doctor-bound ink chamber (20), characterized in that the surface of the sealing block (30) facing the applicator roller (10) is covered with a strip (34) of elastic material which is harder than that Seal block material. Dichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Streifen (32) aus Metall besteht.Seal according to claim 1, characterized in that the strip (32) consists of metal. Dichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Streifen (34) lösbar an der Kammerrakel (12) gehalten ist.Seal according to claim 1 or 2, characterized in that the strip (34) is releasably held on the chambered doctor blade (12). Dichtung nach Anspruch 3, dadurch gekennzeichnet, daß der Streifen (34) nur mit einem Ende am Gehäuse (14) der Kammertakel und/oder an einem der Rakelmesser (16) befestigt ist.Seal according to claim 3, characterized in that the strip (34) is fastened with only one end to the housing (14) of the chamber rods and / or to one of the doctor blades (16). Dichtung nach Anspruch 4, dadurch gekennzeichnet, daß der Streifen (34) mit seinem in Rotationsrichtung der Auftragwalze (10) hinteren Ende an der Kammerrakel befestigt ist.Seal according to claim 4, characterized in that the strip (34) is fastened to the chamber doctor blade with its rear end in the direction of rotation of the application roller (10). Dichtung nach Anspruch 5, dadurch gekennzeichnet, daß der Streifen (34) in eine zwischen dem Rakelmesser (16) und dem Gehäuse (14) der Kammertakel gebildete Tasche (36) eingesteckt ist.Seal according to claim 5, characterized in that the strip (34) is inserted into a pocket (36) formed between the doctor blade (16) and the housing (14) of the chamber rod. Dichtung nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, daß das entgegengesetzte Ende des Streifens (34) an der der Farbkammer (20) zugewandten Innenfläche des anderen Rakelmessers (18) anliegt.Seal according to one of claims 4 to 6, characterized in that the opposite end of the strip (34) bears on the inner surface of the other doctor blade (18) facing the ink chamber (20). Dichtung nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, daß das entgegengesetzte Ende des Streifens (34) zwischen dem anderen Rakelmesser (18) und dem Umfang der Auftragwalze (10) austritt.Seal according to one of claims 4 to 6, characterized in that the opposite end of the strip (34) emerges between the other doctor blade (18) and the circumference of the application roller (10).
EP98101431A 1998-01-28 1998-01-28 Ink rail seal Expired - Lifetime EP0949074B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE59800788T DE59800788D1 (en) 1998-01-28 1998-01-28 Squeegee seal
EP98101431A EP0949074B1 (en) 1998-01-28 1998-01-28 Ink rail seal
US09/215,972 US6016748A (en) 1998-01-28 1998-12-18 Seal for a chamber doctor blade
JP11015356A JPH11254650A (en) 1998-01-28 1999-01-25 Sealing unit for doctor blade unit of chamber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98101431A EP0949074B1 (en) 1998-01-28 1998-01-28 Ink rail seal

Publications (2)

Publication Number Publication Date
EP0949074A1 true EP0949074A1 (en) 1999-10-13
EP0949074B1 EP0949074B1 (en) 2001-05-30

Family

ID=8231316

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98101431A Expired - Lifetime EP0949074B1 (en) 1998-01-28 1998-01-28 Ink rail seal

Country Status (4)

Country Link
US (1) US6016748A (en)
EP (1) EP0949074B1 (en)
JP (1) JPH11254650A (en)
DE (1) DE59800788D1 (en)

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DE202009013643U1 (en) 2009-10-26 2011-03-17 Zeljko, Kitic sealing element
EP2821228A1 (en) * 2013-06-27 2015-01-07 Heidelberger Druckmaschinen AG Seal for squeegee devices

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FR2792249B1 (en) * 1999-04-19 2001-06-22 Fort James France END-SEALING DEVICE FOR A RACLE CHAMBER
DE10047394A1 (en) * 1999-10-15 2001-04-19 Heidelberger Druckmasch Ag Modular printing machine system satellite system of print cylinders and a second printer with one zone-less printing device for uniform dosage of ink
EP1683633B1 (en) * 2005-01-24 2011-09-21 Gallus Ferd. Rüesch AG Gravure printing unit for printing on a web in a printing machine
US20070261577A1 (en) * 2006-04-26 2007-11-15 Burrow William J Printing roll with dead band helical pattern
US7597761B2 (en) * 2006-08-10 2009-10-06 Van Denend Mark E Sealing assembly for an ink chamber which includes self-lubricating anilox roll seal with improved blade/seal area
DK176626B1 (en) * 2007-08-21 2008-12-01 Tresu Anlaeg As Gasket for chamber stain
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DE102008042263B4 (en) * 2008-09-22 2011-01-27 Koenig & Bauer Aktiengesellschaft Apparatus for applying printing ink
US8474378B1 (en) 2010-02-23 2013-07-02 Valley Holdings, Llc Chamber blade/sealing assembly for a printing press
EP2930025B1 (en) 2014-04-11 2018-05-30 wiguTec Gummitechnologie GmbH & Co. KG Seal element
DE202014101740U1 (en) 2014-04-11 2015-07-14 Wigutec Gummitechnologie Gmbh & Co. Kg sealing element
JP6344810B1 (en) * 2018-02-13 2018-06-20 下村　恭一 Gravure printing method and squeegee used therefor

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DE4302671A1 (en) * 1993-01-30 1994-08-18 Roland Man Druckmasch Short inking unit
GB2278315A (en) * 1993-05-27 1994-11-30 Roland Man Druckmasch Chambered doctor blade
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ES2216725A1 (en) * 2004-04-20 2004-10-16 Comexi, Sa Scraper device for an ink unit of a flexographic printer
WO2005101952A2 (en) * 2004-04-20 2005-11-03 Comexi, Sa Scraper device for an ink unit of a flexographic printer
WO2005101952A3 (en) * 2004-04-20 2005-12-01 Comexi Sa Scraper device for an ink unit of a flexographic printer
DE202009013643U1 (en) 2009-10-26 2011-03-17 Zeljko, Kitic sealing element
EP2821228A1 (en) * 2013-06-27 2015-01-07 Heidelberger Druckmaschinen AG Seal for squeegee devices
US9272503B2 (en) 2013-06-27 2016-03-01 Heidelberger Druckmaschinen Ag Seal for doctor blade devices and doctor blade device having a seal

Also Published As

Publication number Publication date
DE59800788D1 (en) 2001-07-05
JPH11254650A (en) 1999-09-21
EP0949074B1 (en) 2001-05-30
US6016748A (en) 2000-01-25

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