EP0770479A1 - Zonal inking knife for a rotary printing machine - Google Patents

Zonal inking knife for a rotary printing machine Download PDF

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Publication number
EP0770479A1
EP0770479A1 EP96114210A EP96114210A EP0770479A1 EP 0770479 A1 EP0770479 A1 EP 0770479A1 EP 96114210 A EP96114210 A EP 96114210A EP 96114210 A EP96114210 A EP 96114210A EP 0770479 A1 EP0770479 A1 EP 0770479A1
Authority
EP
European Patent Office
Prior art keywords
color
knife
ink
hard material
color knife
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
EP96114210A
Other languages
German (de)
French (fr)
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EP0770479B1 (en
Inventor
Joseph Gordon Blackwell
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.)
Heidelberger Druckmaschinen AG
Goss International Montataire SA
Original Assignee
Heidelberger Druckmaschinen AG
Heidelberg Harris SA
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Filing date
Publication date
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Publication of EP0770479A1 publication Critical patent/EP0770479A1/en
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Publication of EP0770479B1 publication Critical patent/EP0770479B1/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F9/00Rotary intaglio printing presses
    • B41F9/06Details
    • B41F9/08Wiping mechanisms
    • B41F9/10Doctors, scrapers, or like devices
    • B41F9/1072Blade construction
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F31/00Inking arrangements or devices
    • B41F31/02Ducts, containers, supply or metering devices
    • B41F31/04Ducts, containers, supply or metering devices with duct-blades or like metering devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41PINDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2231/00Inking devices; Recovering printing ink
    • B41P2231/12Axially segmented ink blades

Definitions

  • the invention relates to an ink knife for a rotary printing press, which can be arranged in the ink fountain of an inking unit of the rotary printing press and serves to strip off printing ink from an ink fountain roller of the inking unit, the free end area of the ink fountain knife to be assigned to the ink fountain roller having a number of slots for zonal division, as a result of which a corresponding number is formed by individual knives.
  • Such color knives are known. They are located within the inking unit of the rotary printing press and serve to provide the smallest possible color film for printing. Due to the zonal division of the ink knife, individual knives are formed, which can be individually adjusted in relation to the ink fountain roller, so that the ink film layer thickness of the individual zone can be specified depending on the subject.
  • An actuator is preferably assigned to each individual knife in order to be able to adjust the gap width of the area between the end of each free end of a single knife and the surface of the ink fountain roller from the control center of the machine.
  • the color film layer thickness of each zone can thus be adapted to the circumstances, with a relatively thin layer thickness often being sought in order to achieve good printing results.
  • the layer thickness is determined on the one hand by the setting of the actuator and on the other hand also by the position of the individual knife in relation to the ink fountain roller.
  • Print quality is not just a matter of setting it up correctly of the respective individual knife, but also requires that the edges of the individual knives cooperating with the ink fountain roller are adapted to the contour of the ink fountain roller, in particular to have a correct alignment with the lateral surface.
  • a correctly set-up individual knife should keep its parameters unchanged for as long as possible.
  • the zonal color meters known from US 3,699,888 and DE 37 07 570 have deficiencies in this regard.
  • the invention is therefore based on the object of providing a colorimeter of the type mentioned at the outset, which brings with it a high degree of reproducibility over a long period of time and also ensures optimum print quality.
  • the contact zones of the individual knives with the ink fountain roller are provided with a hard material coating arranged on a base body of the ink knife.
  • the hard material coating ensures that, on the one hand, there is a surface which is optimally matched to the corresponding outer surface of the ink fountain roller and is essentially resistant to signs of wear. Long operating times are possible without having to carry out readjustments. The reproducibility of the work result is given.
  • the coating allows a particularly thin color layer formation if this thin layer thickness is desired.
  • the main body of the color knife which is preferably designed as a one-piece component, is provided with the hard material coating, although there is a zonal subdivision, i.e.
  • the hard material coating is designed as a ceramic coating.
  • the ceramic coating has titanium dioxide (TiO 2 ).
  • the ceramic coating has Al 2 O 3 .
  • a very good connection to the base body is obtained when the ceramic coating is applied to an intermediate layer which has nickel, in particular in the form of a nickel-chromium intermediate layer, the intermediate layer being located between the base body and the hard material coating.
  • each individual knife is designed as a bevel in the free end area of the color knife.
  • the base body can in particular consist of metal, preferably steel.
  • each slot is formed by a narrow slot starting from the free end of the color knife and an adjoining wide slot.
  • a “narrow slot” is to be understood as a slot with only a very small slot width, while a “wide slot” has a larger slot width.
  • the wide slots are preferably closed with elastic material. The elasticity of this material allows a single knife setting despite the seal, that means a relative movement to the respective neighboring individual knife. There is no sealing measure within the narrow slot by introducing sealing material.
  • the slot width of the narrow slot is preferably selected such that the printing ink does not pass.
  • the hard material coating is preferably only on the upper side of the color knife, but not in the area of the slots, in particular in the area of the narrow slots or the wide slots.
  • Figure 1 shows - in a schematic representation - a color meter 1, which is located within a color box, not shown. Viewed in cross section, the color knife 1 has an approximately trapezoidal shape, that is to say Top 2 and bottom 3 converge towards the free end 4.
  • a bevel 5 is formed, which starts from the end face of the free end 4 and extends to the top 2.
  • the bevel 5 on the top 2 of the ink knife 1 or a part of it forms a contact zone 6 with the outer surface 7 of an ink fountain roller 8 of the inking unit.
  • the top view of FIG. 2 shows that the color knife 1 is designed as a zonal color knife, that is to say it is divided into individual knives 10 by means of several, preferably parallel, spaced slots 9.
  • the slots 9 extend from the free end 4 of the ink knife 1 and extend into the region of a fastening zone 11, which is used to mount the ink knife 1 in the ink fountain. Due to the slots 9, the individual knives 10 are cut free, so that they can be individually adjusted by means of suitable actuators, not shown, that is, the formation of the ink layer thickness can be adjusted zonally.
  • thirty individual knives 10 and thus thirty color zones are provided.
  • FIG. 3 shows that a hard material coating 12 is applied to the top 2 of the color knife 1.
  • This hard material coating 12 is located on the bevel 5 and extends from there over part of the length of the individual knives 10.
  • the color knife 1 preferably has a base body 13 made of steel, which was first hardened and then tempered again, on which at least in the area of the hard material coating 12 - an intermediate layer 14 is applied, which has nickel, is preferably designed as a nickel-chromium intermediate layer. The addition of nickel-chrome improves the Bending properties, as well as the corrosion resistance.
  • the hard material coating 12 is applied to this intermediate layer 14.
  • the bottom 3 of the base body 13 runs in the area facing away from the free end 4 parallel to the top and in the front free end area at an angle ⁇ of 2 ° to 10 °, preferably 5.5 °.
  • the angle ⁇ is formed between the area of the underside 3 running parallel to the upper side 2 and the then inclined surface 15 (FIG. 3).
  • the upper side 2 with the bevel 5 has an angle of 15 ° to 35 °, preferably 25 °. This angle is marked with ⁇ .
  • FIG. 4 illustrates that the slots 9 are composed of two parts, namely a narrow slot 16 starting from the free end 4 and merging into a wide slot 17.
  • the narrow slot 16 has only a very small slot width of preferably 0.03 to 0.06 mm.
  • the wide slot 17 has in particular a slot width of 3 mm and is closed with an elastic material 18.
  • the elastic material is preferably polyurethane or another suitable material. This material prevents paint from running out of the wide slot 17, but guarantees that the individual knives 10 can move.
  • Neither the hard material coating 12 nor the elastic material 18 is located within the narrow slot 16.
  • the hard material coating 12 runs only over a partial area of the upper side 2, and only on the side facing the ink fountain roller 8.
  • the hard material coating 12 ends in the area of the wide slots 17 (reference number 19) and thus covers the area that has the narrow slots 16.
  • the hard material coating 12 is preferably designed as a ceramic coating.
  • the graphic according to FIG. 6 shows the wear of a color meter as a function of the operating time.
  • the hard material coating 12 adapts optimally to the contour of the surface of the ink fountain roller 8. This is done in such a way that no post-processing is necessary, such as when mounting with clamping elements for the ink knife, the clamping forces acting on the ink knife from below.
  • the curve of curve A shows, the wear during the operating time is very low. It can be seen that the color knife can still be used for a long time. Even after approximately 500 hours of operation, the wear on the hard material coating 12 is still moderate.
  • curve C shows the wear of a conventional color meter as a function of the operating time.
  • Curve C shows a significantly higher wear compared to that which the colorimeter 1 according to the present invention experiences, even after only a short use.
  • curve B shows the level of wear up to which conventional colorimeters are generally used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Pens And Brushes (AREA)
  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Rotary Presses (AREA)
  • Adjustable Resistors (AREA)

Abstract

With the free end area of the ink blade having several slots for zonal division, a corresponding number of individual blades is formed. The contact zones of the individual blades (10) with the ink duct roller are provided with a hard material coating (12) arranged on a basic body (13) of the ink blade. The hard material coating is of ceramic with bending properties. It can be of titanium dioxide or of aluminium trioxide. It is fitted on an intermediate layer, particularly of nickel chrome, which is located between the basic body and the hard material coating. The contact zone of each individual blade is formed as an inclined surface (5) at the free end area (4) of the ink blade (1).

Description

Die Erfindung betrifft ein Farbmesser für eine Rotationsdruckmaschine, das im Farbkasten eines Farbwerks der Rotationsdruckmaschine anordenbar ist und dem Abstreifen von Druckfarbe von einer Farbkastenwalze des Farbwerks dient, wobei der der Farbkastenwalze zuzuordnende freie Endbereich des Farbmessers zur zonalen Unterteilung mehrere Schlitze aufweist, wodurch eine entsprechende Anzahl von Einzelmessern ausgebildet ist.The invention relates to an ink knife for a rotary printing press, which can be arranged in the ink fountain of an inking unit of the rotary printing press and serves to strip off printing ink from an ink fountain roller of the inking unit, the free end area of the ink fountain knife to be assigned to the ink fountain roller having a number of slots for zonal division, as a result of which a corresponding number is formed by individual knives.

Derartige Farbmesser sind bekannt. Sie befinden sich innerhalb des Farbwerks der Rotationsdruckmaschine und dienen dazu, einen möglichst dünnen Farbfilm für den Druck zur Verfügung zu stellen. Aufgrund der zonalen Einteilung des Farbmessers sind Einzelmesser ausgebildet, die individuell im Bezug auf die Farbkastenwalze einstellbar sind, wodurch die Farbfilm-Schichtdicke der einzelnen Zone je nach Sujet vorgebbar ist. Vorzugsweise ist jedem Einzelmesser ein Aktuator zugeordnet um die Spaltbreite des Bereiches zwischen dem Ende jedes einzelnen freien Endes eines Einzelmessers und der Oberfläche der Farbkastenwalze vom Leitstand der Maschine aus einstellen zu können. Die Farbfilm-Schichtdicke jeder Zone ist somit den Gegebenheiten anpaßbar, wobei zur Erzielung guter Druckergebnisse oftmals eine relativ dünne Schichtdicke angestrebt wird. Die Schichtdicke wird einerseits von der Einstellung des Aktuators und andererseits jedoch auch von der Anlagestellung des jeweiligen Einzelmessers zur Farbkastenwalze bestimmt. Die Druckqualität wird nicht nur von dem korrekten Einrichten des jeweiligen Einzelmessers bestimmt, sondern erfordert ferner, daß die mit der Farbkastenwalze zusammenwirkenden Kanten der Einzelmesser der Kontur der Farbkastenwalze angepaßt sind, insbesondere zur Mantelfläche eine korrekte Ausrichtung aufweisen. Um über lange Zeit reproduzierbare Ergebnisse zu erhalten, sollte ein korrekt eingerichtetes Einzelmesser möglichst lange unverändert seine Parameter beibehalten. Bei den aus US 3,699,888 und DE 37 07 570 bekannten zonalen Farbmessern bestehen in dieser Hinsicht Mängel.Such color knives are known. They are located within the inking unit of the rotary printing press and serve to provide the smallest possible color film for printing. Due to the zonal division of the ink knife, individual knives are formed, which can be individually adjusted in relation to the ink fountain roller, so that the ink film layer thickness of the individual zone can be specified depending on the subject. An actuator is preferably assigned to each individual knife in order to be able to adjust the gap width of the area between the end of each free end of a single knife and the surface of the ink fountain roller from the control center of the machine. The color film layer thickness of each zone can thus be adapted to the circumstances, with a relatively thin layer thickness often being sought in order to achieve good printing results. The layer thickness is determined on the one hand by the setting of the actuator and on the other hand also by the position of the individual knife in relation to the ink fountain roller. Print quality is not just a matter of setting it up correctly of the respective individual knife, but also requires that the edges of the individual knives cooperating with the ink fountain roller are adapted to the contour of the ink fountain roller, in particular to have a correct alignment with the lateral surface. In order to obtain reproducible results over a long period of time, a correctly set-up individual knife should keep its parameters unchanged for as long as possible. The zonal color meters known from US 3,699,888 and DE 37 07 570 have deficiencies in this regard.

Der Erfindung liegt daher die Aufgabe zugrunde, ein Farbmesser der eingangs genannten Art zu schaffen, das eine hohe Reproduzierbarkeit über eine lange Zeitdauer mit sich bringt und überdies optimale Druckqualität gewährleistet.The invention is therefore based on the object of providing a colorimeter of the type mentioned at the outset, which brings with it a high degree of reproducibility over a long period of time and also ensures optimum print quality.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Berührungszonen der Einzelmesser mit der Farbkastenwalze mit einer auf einem Grundkörper des Farbmessers angeordnete Hartstoff-Beschichtung versehen sind. Durch die Hartstoff-Beschichtung ist gewährleistet daß einerseits eine der entsprechenden Mantelfläche der Farbkastenwalze optimal angepaßte und gegen Abnutzungserscheinungen im wesentlichen resistente Oberfläche vorliegt. Lange Betriebszeiten sind möglich, ohne daß Nachstellarbeiten durchgeführt werden müssen. Die Reproduzierbarkeit des Arbeitsergebnisses ist damit gegeben. Gleichzeitig erlaubt die Beschichtung eine besonders dünne Farbschichtausbildung, sofern diese dünne Schichtdicke gewünscht ist. Von Besonderheit ist, daß der vorzugsweise als einstückiges Bauteil ausgebildete Grundkörper des Farbmessers mit der Hartstoff-Beschichtung versehen ist, obwohl eine zonale Unterteilung, also die Ausbildung von mehreren Einzelmessern vorliegt, zwischen denen Schlitze liegen, damit eine individuelle Einstellung der Einzelmesser möglich ist. Erfindungsgemäß hat sich gezeigt, daß trotz zumeist nur sehr kleiner Schlitzbreite der zwischen den Einzelmessern liegenden Schlitze eine Hartstoff-Beschichtung erfolgen kann, ohne daß zum Beispiel eine Einzelmesserverstellung zu Problemen im Randbereich der Beschichtung, beispielsweise zu dessen Abplatzen, führt.This object is achieved in that the contact zones of the individual knives with the ink fountain roller are provided with a hard material coating arranged on a base body of the ink knife. The hard material coating ensures that, on the one hand, there is a surface which is optimally matched to the corresponding outer surface of the ink fountain roller and is essentially resistant to signs of wear. Long operating times are possible without having to carry out readjustments. The reproducibility of the work result is given. At the same time, the coating allows a particularly thin color layer formation if this thin layer thickness is desired. It is special that the main body of the color knife, which is preferably designed as a one-piece component, is provided with the hard material coating, although there is a zonal subdivision, i.e. the formation of several individual knives, between which there are slots, so that individual adjustment of the individual knives is possible. According to the invention, it has been shown that despite mostly only a very small slot width a hard material coating can take place between the individual knives slots without, for example, an individual knife adjustment leading to problems in the edge region of the coating, for example to chipping.

Nach einer Weiterbildung der Erfindung ist vorgesehen, daß die Hartstoff-Beschichtung als Keramik-Beschichtung ausgebildet ist.According to a development of the invention, it is provided that the hard material coating is designed as a ceramic coating.

Vorteilhaft ist es ferner, wenn die Keramik-Beschichtung Titandioxid (TiO2) aufweist. Insbesondere kann vorgesehen sein, daß die Keramik-Beschichtung Al2O3 aufweist.It is also advantageous if the ceramic coating has titanium dioxide (TiO 2 ). In particular, it can be provided that the ceramic coating has Al 2 O 3 .

Eine sehr gute Verbindung mit dem Grundkörper ergibt sich dann, wenn die Keramik-Beschichtung auf eine Zwischenschicht aufgebracht ist, die Nickel aufweist, insbesondere als Nickel-Chrom-Zwischenschicht ausgebildet ist, wobei sich die Zwischenschicht zwischen dem Grundkörper und der Hartstoff-Beschichtung befindet.A very good connection to the base body is obtained when the ceramic coating is applied to an intermediate layer which has nickel, in particular in the form of a nickel-chromium intermediate layer, the intermediate layer being located between the base body and the hard material coating.

Nach einem bevorzugten Ausführungsbeispiel der Erfindung ist vorgesehen, daß die Berührungszone jedes Einzelmessers als Abschrägung im freien Endbereich des Farbmessers ausgebildet ist. Der Grundkörper kann insbesondere aus Metall, vorzugsweise aus Stahl, bestehen.According to a preferred embodiment of the invention, it is provided that the contact zone of each individual knife is designed as a bevel in the free end area of the color knife. The base body can in particular consist of metal, preferably steel.

Vorteilhaft ist es, wenn jeder Schlitz von einem vom freien Ende des Farbmessers ausgehenden Engschlitz und einem sich daran anschließenden Weitschlitz gebildet ist. Unter einem "Engschlitz" ist ein Schlitz mit nur sehr geringer Schlitzbreite zu verstehen, während ein "Weitschlitz" eine größere Schlitzweite aufweist. Um zu verhindern, daß Druckfarbe durch die Weitschlitze aus dem Farbkasten austritt, sind die Weitschlitze vorzugsweise mit elastischem Material verschlossen. Die Elastizität dieses Materials erlaubt trotz der Abdichtung eine Einzelmessereinstellung, das heißt eine Relativbewegung zum jeweiligen Nachbar-Einzelmesser. Innerhalb des Engschlitzes erfolgt keine Abdichtmaßnahme durch Einbringen von Dichtmaterial. Vorzugsweise ist die Schlitzweite des Engschlitzes derart gewählt, daß kein Passieren der Druckfarbe erfolgt.It is advantageous if each slot is formed by a narrow slot starting from the free end of the color knife and an adjoining wide slot. A "narrow slot" is to be understood as a slot with only a very small slot width, while a "wide slot" has a larger slot width. In order to prevent printing ink from escaping from the ink fountain through the wide slots, the wide slots are preferably closed with elastic material. The elasticity of this material allows a single knife setting despite the seal, that means a relative movement to the respective neighboring individual knife. There is no sealing measure within the narrow slot by introducing sealing material. The slot width of the narrow slot is preferably selected such that the printing ink does not pass.

Bevorzugt befindet sich die Hartstoff-Beschichtung nur auf der Oberseite des Farbmessers, nicht jedoch im Bereich der Schlitze, insbesondere im Bereich der Engschlitze beziehungsweise der Weitschlitze.The hard material coating is preferably only on the upper side of the color knife, but not in the area of the slots, in particular in the area of the narrow slots or the wide slots.

Die Zeichnungen veranschaulichen die Erfindung und zwar zeigt:

Figur 1
eine schematische Darstellung der Anlage eines Farbmessers an der Mantelfläche einer Farbkastenwalze,
Figur 2
eine Draufsicht auf das zonale Farbmesser,
Figur 3
eine Seitenansicht auf das Farbmesser der Figur 2 in Richtung des Pfeiles III,
Figur 4
eine Detailansicht auf die Oberseite des Farbmessers,
Figur 5
eine Schnittansicht entlang der Linie V-V in Figur 4,
Figur 6
ein Diagramm, in welchem die Abnutzung von Farbmessern als Funktion der Zeit aufgetragen ist.
The drawings illustrate the invention and show:
Figure 1
1 shows a schematic representation of the installation of an ink knife on the outer surface of an ink fountain roller,
Figure 2
a top view of the zonal color meter,
Figure 3
3 shows a side view of the color knife of FIG. 2 in the direction of arrow III,
Figure 4
a detailed view of the top of the color knife,
Figure 5
3 shows a sectional view along the line VV in FIG. 4,
Figure 6
a diagram in which the wear of color meters is plotted as a function of time.

Figur 1 zeigt -in schematischer Darstellung- ein Farbmesser 1, das sich innerhalb eines nicht dargestellten Farbkastens befindet. Das Farbmesser 1 weist -im Querschnitt gesehen- etwa trapezförmige Gestalt auf, das heißt, Oberseite 2 und Unterseite 3 konvergieren zum freien Ende 4 hin.Figure 1 shows - in a schematic representation - a color meter 1, which is located within a color box, not shown. Viewed in cross section, the color knife 1 has an approximately trapezoidal shape, that is to say Top 2 and bottom 3 converge towards the free end 4.

Im Bereich des freien Endes 4 ist eine Abschrägung 5 ausgebildet, die von der Stirnseite des freien Endes 4 ausgeht und sich bis zur Oberseite 2 erstreckt. Die Abschrägung 5 an der Oberseite 2 des Farbmessers 1 beziehungsweise ein Teil von ihr bildet eine Berührungszone 6 mit der Mantelfläche 7 einer Farbkastenwalze 8 des Farbwerks.In the area of the free end 4, a bevel 5 is formed, which starts from the end face of the free end 4 and extends to the top 2. The bevel 5 on the top 2 of the ink knife 1 or a part of it forms a contact zone 6 with the outer surface 7 of an ink fountain roller 8 of the inking unit.

Die Draufsicht der Figur 2 verdeutlicht, daß das Farbmesser 1 als zonales Farbmesser ausgebildet ist, das heißt, es wird mittels mehrerer, vorzugsweise parallel zueinander verlaufender, beabstandeter Schlitze 9 in Einzelmesser 10 unterteilt. Die Schlitze 9 gehen vom freien Ende 4 des Farbmessers 1 aus und erstrecken sich bis in den Bereich einer Befestigungszone 11, die der Montage des Farbmessers 1 im Farbkasten dient. Aufgrund der Schlitze 9 werden die Einzelmesser 10 freigeschnitten, so daß sie individuell mittels geeigneter, nicht dargestellter Aktuatoren einstellbar sind, das heißt, die Ausbildung der Druckfarben-Schichtdicke läßt sich zonal einstellen. Im gezeigten Ausführungsbeispiel der Figur 2 sind dreißig Einzelmesser 10 und somit dreißig Farbzonen vorgesehen.The top view of FIG. 2 shows that the color knife 1 is designed as a zonal color knife, that is to say it is divided into individual knives 10 by means of several, preferably parallel, spaced slots 9. The slots 9 extend from the free end 4 of the ink knife 1 and extend into the region of a fastening zone 11, which is used to mount the ink knife 1 in the ink fountain. Due to the slots 9, the individual knives 10 are cut free, so that they can be individually adjusted by means of suitable actuators, not shown, that is, the formation of the ink layer thickness can be adjusted zonally. In the exemplary embodiment shown in FIG. 2, thirty individual knives 10 and thus thirty color zones are provided.

Die Detailansicht der Figur 3 verdeutlicht, daß auf der Oberseite 2 des Farbmessers 1 eine Hartstoff-Beschichtung 12 aufgebracht ist. Diese Hartstoff-Beschichtung 12 befindet sich auf der Abschrägung 5 und erstreckt sich von dort aus über einen Teil der Länge der Einzelmesser 10. Vorzugsweise weist das Farbmesser 1 einen Grundkörper 13 aus Stahl auf, der zunächst gehärtet und danach wieder angelassen wurde, auf dem -zumindest im Bereich der Hartstoff-Beschichtung 12- eine Zwischenschicht 14 aufgebracht ist, die Nickel aufweist, vorzugsweise als Nickel-Chrom-Zwischenschicht ausgebildet ist. Die Nickel-Chrom-Beigabe verbessert insbesondere die Biegeeigenschaften, wie auch die Korrosionswiderstandsfähigkeit. Auf diese Zwischenschicht 14 ist die Hartstoff-Beschichtung 12 aufgebracht. Gegenüber der Oberseite 2 verläuft die Unterseite 3 des Grundkörpers 13 im dem freien Ende 4 abgewandten Bereich parallel zur Oberseite und im vorderen freien Endbereich unter einem Winkel α von 2° bis 10°, vorzugsweise 5,5°. Der Winkel α ist zwischen dem parallel zur Oberseite 2 verlaufenden Bereich der Unterseite 3 und der dann anschließenden Schrägfläche 15 (Figur 3) ausgebildet. Ferner geht aus Figur 3 hervor, daß die Oberseite 2 mit der Abschrägung 5 einen Winkel von 15° bis 35° vorzugsweise 25° aufweist. Dieser Winkel ist mit β gekennzeichnet.The detailed view in FIG. 3 shows that a hard material coating 12 is applied to the top 2 of the color knife 1. This hard material coating 12 is located on the bevel 5 and extends from there over part of the length of the individual knives 10. The color knife 1 preferably has a base body 13 made of steel, which was first hardened and then tempered again, on which at least in the area of the hard material coating 12 - an intermediate layer 14 is applied, which has nickel, is preferably designed as a nickel-chromium intermediate layer. The addition of nickel-chrome improves the Bending properties, as well as the corrosion resistance. The hard material coating 12 is applied to this intermediate layer 14. Compared to the top 2, the bottom 3 of the base body 13 runs in the area facing away from the free end 4 parallel to the top and in the front free end area at an angle α of 2 ° to 10 °, preferably 5.5 °. The angle α is formed between the area of the underside 3 running parallel to the upper side 2 and the then inclined surface 15 (FIG. 3). It can also be seen from FIG. 3 that the upper side 2 with the bevel 5 has an angle of 15 ° to 35 °, preferably 25 °. This angle is marked with β.

Die Figur 4 verdeutlicht, daß sich die Schlitze 9 aus zwei Teilen zusammensetzen, nämlich jeweils ein vom freien Ende 4 ausgehender Engschlitz 16, der in einen Weitschlitz 17 übergeht. Der Engschlitz 16 weist nur eine sehr geringe Schlitzbreite von vorzugsweise 0,03 bis 0,06 mm auf. Der Weitschlitz 17 hat insbesondere eine Schlitzbreite von 3 mm und ist mit einem elastischen Material 18 verschlossen. Vorzugsweise handelt es sich bei dem elastischen Material um Polyuretan oder einem anderen geeigneten Material. Dieses Material verhindert, daß Farbe aus dem Weitschlitz 17 herauslaufen kann, garantiert jedoch eine Bewegbarkeit der Einzelmesser 10. Innerhalb des Engschlitzes 16 befindet sich weder die Hartstoff-Beschichtung 12 noch elastisches Material 18. Die Hartstoff- Beschichtung 12 verläuft nur über einen Teilbereich der Oberseite 2, und zwar nur auf der der Farbkastenwalze 8 zugewandten Seite. Die Hartstoff-Beschichtung 12 endet im Bereich der Weitschlitze 17 (Bezugszeichen 19) und bedeckt somit den Bereich, der die Engschlitze 16 aufweist.FIG. 4 illustrates that the slots 9 are composed of two parts, namely a narrow slot 16 starting from the free end 4 and merging into a wide slot 17. The narrow slot 16 has only a very small slot width of preferably 0.03 to 0.06 mm. The wide slot 17 has in particular a slot width of 3 mm and is closed with an elastic material 18. The elastic material is preferably polyurethane or another suitable material. This material prevents paint from running out of the wide slot 17, but guarantees that the individual knives 10 can move. Neither the hard material coating 12 nor the elastic material 18 is located within the narrow slot 16. The hard material coating 12 runs only over a partial area of the upper side 2, and only on the side facing the ink fountain roller 8. The hard material coating 12 ends in the area of the wide slots 17 (reference number 19) and thus covers the area that has the narrow slots 16.

Die Hartstoff-Beschichtung 12 ist vorzugsweise als Keramik-Beschichtung ausgebildet. Insbesondere weist sie Titandioxid (TiO2) auf. Ferner kann sie Aluminium aufweisen. Insbesondere ist vorgesehen, daß sie ein Gemisch von Al2O3 und wenigen Prozenten Titandioxid TiO2 aufweist, z.B. 1-5% (TiO2). Bevorzugt wird sie mittels Plasmaverfahren aufgebracht.The hard material coating 12 is preferably designed as a ceramic coating. In particular, she points out Titanium dioxide (TiO 2 ). It can also have aluminum. In particular, it is provided that it has a mixture of Al 2 O 3 and a few percent titanium dioxide TiO 2 , for example 1-5% (TiO 2 ). It is preferably applied by means of a plasma process.

Die Grafik gemäß Figur 6 zeigt den Verschleiß eines Farbmessers als Funktion der Betriebszeit.The graphic according to FIG. 6 shows the wear of a color meter as a function of the operating time.

Unmittelbar nach Inbetriebnahme paßt sich die Hartstoffbeschichtung 12 in optimaler Weise an die Kontur der Oberfläche der Farbkastenwalze 8 an. Dies erfolgt dergestalt daß keine Nachbearbeitungen notwendig werden, wie etwa bei einer Montage mit Klemmelementen für das Farbmesser, wobei die Einspannkräfte von unten auf das Farbmesser einwirken. Wie der Kurvenverlauf der Kurve A zeigt, ist der Verschleiß während der Betriebszeit sehr gering. Es ist erkennbar, daß das Farbmesser noch für längere Zeit benutzt werden kann. Selbst nach ca. 500 h Betriebszeit ist der Verschleiß der Hartstoffbeschichtung 12 noch moderat.Immediately after commissioning, the hard material coating 12 adapts optimally to the contour of the surface of the ink fountain roller 8. This is done in such a way that no post-processing is necessary, such as when mounting with clamping elements for the ink knife, the clamping forces acting on the ink knife from below. As the curve of curve A shows, the wear during the operating time is very low. It can be seen that the color knife can still be used for a long time. Even after approximately 500 hours of operation, the wear on the hard material coating 12 is still moderate.

Zum Vergleich verdeutlicht Kurve C den Verschleiß eines konventionellen Farbmessers als Funktion der Betriebszeit. Kurve C zeigt einen deutlich höheren Verschleiß verglichen mit dem, den das Farbmesser 1 gemäß der vorliegenden Erfindung erfährt, selbst nach einem nur kurzen Einsatz.For comparison, curve C shows the wear of a conventional color meter as a function of the operating time. Curve C shows a significantly higher wear compared to that which the colorimeter 1 according to the present invention experiences, even after only a short use.

Kurve B schließlich zeigt das Verschleißniveau an, bis zu welchem konventionelle Farbmesser generell eingesetzt werden.Finally, curve B shows the level of wear up to which conventional colorimeters are generally used.

Claims (12)

Farbmesser für eine Rotationsdruckmaschine, das im Farbkasten eines Farbwerks der Rotationsdruckmaschine anordenbar ist und dem Abstreifen von Druckfarbe von einer Farbkastenwalze des Farbwerks dient, wobei der der Farbkastenwalze zuzuordnende freie Endbereich des Farbmessers zur zonalen Unterteilung mehrere Schlitze aufweist, wodurch eine entsprechende Anzahl von Einzelmesser ausgebildet ist,
dadurch gekennzeichnet,
daß die Berührungszonen (6) der Einzelmesser (10) mit der Farbkastenwalze (8) mit einer auf einem Grundkörper (13) des Farbmesser (1) angeordneten Hartstoff-Beschichtung (12) versehen sind.
Ink knife for a rotary printing press, which can be arranged in the ink fountain of an inking unit of the rotary printing press and is used for stripping printing ink from an ink fountain roller of the inking unit, the free end area of the ink fountain roller to be assigned to the ink fountain roller having a plurality of slots for zonal division, whereby a corresponding number of individual knives is formed ,
characterized by
that the contact zones (6) of the individual knives (10) with the ink fountain roller (8) are provided with a hard material coating (12) arranged on a base body (13) of the ink knife (1).
Farbmesser nach Anspruch 1,
dadurch gekennzeichnet,
daß die Hartstoff-Beschichtung (12) eine Keramik-Beschichtung mit Biegeeigenschaften ist.
Color knife according to claim 1,
characterized by
that the hard material coating (12) is a ceramic coating with bending properties.
Farbmesser nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß die Keramik-Beschichtung Titandioxid (TiO2) aufweist.
Color knife according to one of the preceding claims,
characterized by
that the ceramic coating has titanium dioxide (TiO 2 ).
Farbmesser nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß die Keramik-Beschichtung Al2O3 enthält.
Color knife according to one of the preceding claims,
characterized by
that the ceramic coating contains Al 2 O 3 .
Farbmesser nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß die Hartstoff-Beschichtung (12) auf eine Zwischenschicht (14) aufgebracht ist, die Nickel aufweist, insbesondere als Nickel-Chrom-Zwischenschicht ausgebildet ist, wobei sich die Zwischenschicht (14) zwischen dem Grundkörper (13) und der Hartstoff-Beschichtung (12) befindet.
Color knife according to one of the preceding claims,
characterized by
that the hard material coating (12) is applied to an intermediate layer (14) which has nickel, in particular is designed as a nickel-chromium intermediate layer, the intermediate layer (14) being between the base body (13) and the hard material coating ( 12) is located.
Farbmesser nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß die Berührungszone (6) jedes Einzelmessers (10) als Abschrägung (5) am freien Endbereich (4) des Farbmessers (1) ausgebildet ist.
Color knife according to one of the preceding claims,
characterized by
that the contact zone (6) of each individual knife (10) is designed as a bevel (5) on the free end region (4) of the color knife (1).
Farbmesser nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß der Grundkörper (13) aus Metall, insbesondere aus Stahl besteht.
Color knife according to one of the preceding claims,
characterized by
that the base body (13) consists of metal, in particular steel.
Farbmesser nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß der Stahl-Grundkörper gehärtet und vorzugsweise dann angelassen ist.
Color knife according to one of the preceding claims,
characterized by
that the steel base body is hardened and then preferably tempered.
Farbmesser nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß jeder Schlitz (9) von einem, vom freien Ende (4) des Farbmessers (1) ausgehenden Engschlitz (16) und einem sich daran anschließenden Weitschlitz (17) gebildet ist.
Color knife according to one of the preceding claims,
characterized by
that each slot (9) is formed by a narrow slot (16) starting from the free end (4) of the color knife (1) and an adjoining wide slot (17).
Farbmesser nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß der Weitschlitz (17) mittels eines elastischen Materials (18) verschlossen ist.
Color knife according to one of the preceding claims,
characterized by
that the wide slot (17) is closed by means of an elastic material (18).
Farbmesser nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß sich die Hartstoff-Beschichtung (12) nur auf der Oberseite (2) des Farbmessers (1), nicht jedoch im Engschlitz (16) und vorzugsweise auch nicht im Weitschlitz (17) befindet.
Color knife according to one of the preceding claims,
characterized by
that the hard material coating (12) is only on the top (2) of the color knife (1), but not in the narrow slot (16) and preferably not in the wide slot (17).
Farbmesser nach Anspruch 6,
dadurch gekennzeichnet,
daß die Tangente (21) an die Oberfläche (7) der Farbkastenwalze (8) mit der Abschrägung (5) jedes Einzelmessers (10) einen konstanten Winkel γ zwischen 3° und 15° einschließt.
Color knife according to claim 6,
characterized by
that the tangent (21) to the surface (7) of the ink fountain roller (8) with the bevel (5) of each individual knife (10) includes a constant angle γ between 3 ° and 15 °.
EP96114210A 1995-10-26 1996-09-05 Zonal inking knife for a rotary printing machine Expired - Lifetime EP0770479B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9512641A FR2740386B1 (en) 1995-10-26 1995-10-26 INK BLADE SUBDIVIDED INTO ZONES FOR A ROTARY PRINTING MACHINE
FR9512641 1995-10-26

Publications (2)

Publication Number Publication Date
EP0770479A1 true EP0770479A1 (en) 1997-05-02
EP0770479B1 EP0770479B1 (en) 1999-12-01

Family

ID=9483943

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96114210A Expired - Lifetime EP0770479B1 (en) 1995-10-26 1996-09-05 Zonal inking knife for a rotary printing machine

Country Status (6)

Country Link
US (1) US5778785A (en)
EP (1) EP0770479B1 (en)
JP (1) JP4170406B2 (en)
AT (1) ATE187123T1 (en)
DE (2) DE59603775D1 (en)
FR (1) FR2740386B1 (en)

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EP1057629A2 (en) * 1999-06-03 2000-12-06 Mitsubishi Heavy Industries, Ltd. Ink supply device and ink key thereof

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Publication number Priority date Publication date Assignee Title
FR2778365B1 (en) * 1998-05-11 2000-12-15 Jean Claude Sarda IMPROVEMENTS TO THE INKWRAPERS OF PRINTING PRESSES AND TO THEIR CLEANING METHOD
EP1092535A1 (en) * 1999-10-13 2001-04-18 Think Laboratory Co., Ltd. Doctor blade
US6857366B1 (en) * 1999-11-02 2005-02-22 Erik Nikkanen Printing press ink transfer mechanism and employment of same
JP4932999B2 (en) * 2000-04-26 2012-05-16 ハイデルベルガー ドルツクマシーネン アクチエンゲゼルシヤフト Inking device of printing machine
EP1588854A1 (en) * 2004-04-22 2005-10-26 Kba-Giori S.A. Ink supply device for printing machine
CN100387775C (en) * 2006-04-13 2008-05-14 山东科技大学 Wearable papermaking coating scraper
CN100432333C (en) * 2006-05-12 2008-11-12 戴亚洲 Ceramic coating scraper and its machining process
CN103481661A (en) * 2013-09-05 2014-01-01 常熟市董浜镇徐市嘉峰机械厂 Printing ink scraper structure

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WO1986007309A1 (en) * 1985-06-14 1986-12-18 Uddeholm Strip Steel Aktiebolag Wear resistant doctor blade
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US3699888A (en) * 1971-09-13 1972-10-24 North American Rockwell Composite fountain blade construction for remote ink control system
GB2128551A (en) * 1982-10-13 1984-05-02 Inventing Ab Scraper with wear-resistant coating
GB2156276A (en) * 1983-06-13 1985-10-09 Shinohara Machinery Co Ltd Ink discharge regulation blades
WO1986007309A1 (en) * 1985-06-14 1986-12-18 Uddeholm Strip Steel Aktiebolag Wear resistant doctor blade
DE3707570A1 (en) * 1987-03-10 1988-09-22 Jansen Herfeld Roettger Fa Ductor knife for the printing industry

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1057629A2 (en) * 1999-06-03 2000-12-06 Mitsubishi Heavy Industries, Ltd. Ink supply device and ink key thereof
EP1057629A3 (en) * 1999-06-03 2002-10-16 Mitsubishi Heavy Industries, Ltd. Ink supply device and ink key thereof

Also Published As

Publication number Publication date
DE59603775D1 (en) 2000-01-05
FR2740386B1 (en) 1998-01-16
EP0770479B1 (en) 1999-12-01
US5778785A (en) 1998-07-14
DE19636536A1 (en) 1997-04-30
FR2740386A1 (en) 1997-04-30
JPH09164661A (en) 1997-06-24
JP4170406B2 (en) 2008-10-22
ATE187123T1 (en) 1999-12-15

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