EP0376885B1 - Duct blade for the zonal distribution of an ink film - Google Patents

Duct blade for the zonal distribution of an ink film Download PDF

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Publication number
EP0376885B1
EP0376885B1 EP89810949A EP89810949A EP0376885B1 EP 0376885 B1 EP0376885 B1 EP 0376885B1 EP 89810949 A EP89810949 A EP 89810949A EP 89810949 A EP89810949 A EP 89810949A EP 0376885 B1 EP0376885 B1 EP 0376885B1
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EP
European Patent Office
Prior art keywords
zone
width
metering
slots
plate
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
EP89810949A
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German (de)
French (fr)
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EP0376885A3 (en
EP0376885A2 (en
Inventor
Franz Schneider
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.)
Wifag Maschinenfabrik AG
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Wifag Maschinenfabrik AG
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Publication date
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Application filed by Wifag Maschinenfabrik AG filed Critical Wifag Maschinenfabrik AG
Publication of EP0376885A2 publication Critical patent/EP0376885A2/en
Publication of EP0376885A3 publication Critical patent/EP0376885A3/en
Application granted granted Critical
Publication of EP0376885B1 publication Critical patent/EP0376885B1/en
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Classifications

    • 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
    • B41F31/04—Ducts, containers, supply or metering devices with duct-blades or like metering devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2231/00—Inking devices; Recovering printing ink
    • B41P2231/12—Axially segmented ink blades

Definitions

  • the invention relates to a metering meter for zone-wise metering of a color film of the type mentioned in the preamble of claim 1 and a method for its production.
  • Metering knives of this type are known in a wide variety of embodiments.
  • US-A-2 161 943 shows such a meter.
  • tongue-like individual parts are mounted next to one another on a supporting body by means of screws in such a way that a metering knife is produced.
  • the requirements for the accuracy of the individual parts during production are very high. Precision must also be of great importance during the assembly of the individual dosing elements to form a dosing knife. These accuracies are necessary in order to obtain a metering meter that meets the requirements of practical tightness against color leakage between the metering elements on the one hand and unrestricted mobility between the individual metering elements on the other hand.
  • the manufacture of such a metering knife is therefore very time-consuming and expensive.
  • a metallic coating of one of the two slit sides is carried out with a material which is softer than the material of the color knife, with a galvanic application of a copper layer being preferred here.
  • the thickness of the copper layer to be applied must be slightly larger than the width of the slot, which can be achieved in that the galvanic application is carried out with adjacent tongues spread out, whereupon the excess material is sheared off by the tongues side of the tongues not coated by mutual movement of the tongues , so that a slot is created, the width of which is practically zero.
  • the depressions that were made in the area of the slots in the second work step by material removal are filled with an elastic material. Accordingly, in the case of the metering knife known from this publication, each slot is filled by a wire EDM machine after it has been produced in such a way that the open slot width is practically zero.
  • metering knives which consist of a resilient plate into which slots are incorporated, as can be seen from DE-A 22 28 625.
  • the slots have such a large width that they have to be filled with a soft elastic sealing material in order to maintain a seal against the leakage of the paint.
  • the effort involved in producing this metering knife is also relatively large, and an influence of the adjustment movement of the one tongue on the adjacent tongue that cannot be adjusted cannot be ruled out.
  • the invention is based on the object of further developing a metering knife of the type mentioned at the outset or a method for its production in such a way that the production is simplified and nevertheless sufficient sealing against the passage of paint is ensured.
  • the object is achieved by the features contained in the characterizing part of claim 1 or in claim 3.
  • the width of the slots advantageously ranges from 0.01 mm to 0.03 mm. With such a width of the slot, the leakage for paints of higher viscosity is practically prevented and nevertheless an adjustment movement of the individual zone-wide tongues is ensured without the slightest influence on their adjacent tongues.
  • the slots In order to obtain an effective adjustment of the individual zone-wide tongues without the stress on the material or the adjustment forces to be applied being excessive, the slots have a length of approximately two thirds of the panel width, with a panel width of, for example, 8 cm.
  • the plate thickness is advantageously about one to three millimeters, so that on the one hand the slot is not opened at maximum adjustment, but on the other hand the required strength requirements are met.
  • slots 7 are made in the plate 1, which can be done, for example, by means of laser cutting.
  • the width b of the slots 7 is 0.01 mm to 0.03 mm.
  • the length l of the slots 7 is approximately 2 thirds of the width a of the plate 1. The slots 7 thus form the zone-wide tongues 3 of the metering knife.
  • Fig. 3 shows the adjustability of the zone-wide tongues 3 of the metering knife. From this it can also be seen that the maximum adjustment, as with the zone-wide tongue 3 is shown, may be at most half the thickness d of the plate 1 so that the slots 7 are never opened and the leakage is practically excluded.
  • the metering knife practically no longer needs to be processed after the slots 7 have been introduced. Only the dosing edge is slightly ground, which underlines the simple and cheap manufacture of the dosing knife 1.

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  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Description

Die Erfindung betrifft ein Dosiermesser zum zonenweisen Dosieren eines Farbfilms der im Oberbegriff des Anspruchs 1 genannten Art sowie ein Verfahren zu seiner Herstellung.The invention relates to a metering meter for zone-wise metering of a color film of the type mentioned in the preamble of claim 1 and a method for its production.

Derartige Dosiermesser sind in vielfältiger Ausführungsform bekannt. So zeigt beispielsweise die US-A 2 161 943 ein derartiges Dosiermesser. Hierbei sind zungenartige Einzelteile mittels Schrauben derart nebeneinander auf einen Tragkörper montiert, daß ein Dosiermesser entsteht. Die Anforderungen an die Genauigkeit der einzelnen Teile während der Herstellung sind sehr hoch. Ebenalls während der Montage der einzelnen Dosierelemente zu einem Dosiermesser muß auf die Genauigkeit größter Wert gelegt werden. Diese Genauigkeiten sind erforderlich, um ein Dosiermesser zu erhalten, das die Forderungen der praktischen Dichtheit gegenüber Farbaustritt zwischen den Dosierelementen einerseits und eine uneingeschränkte Beweglichkeit zwischen den einzelnen Dosierelementen andererseits erfüllt. Die Herstellung eines derartigen Dosiermessers ist demzufolge sehr zeitaufwendig und teuer.Metering knives of this type are known in a wide variety of embodiments. For example, US-A-2 161 943 shows such a meter. Here, tongue-like individual parts are mounted next to one another on a supporting body by means of screws in such a way that a metering knife is produced. The requirements for the accuracy of the individual parts during production are very high. Precision must also be of great importance during the assembly of the individual dosing elements to form a dosing knife. These accuracies are necessary in order to obtain a metering meter that meets the requirements of practical tightness against color leakage between the metering elements on the one hand and unrestricted mobility between the individual metering elements on the other hand. The manufacture of such a metering knife is therefore very time-consuming and expensive.

Es ist ferner aus der DE-A-35 25 589 ein Dosiermesser zum zonenweisen Dosieren eines Farbfilms auf einer Walze im Farbwerk einer hochviskose Druckfarben verarbeitenden Druckmaschine bekannt, das aus einer Platte mit federnd biegbaren, je einem Stellglied zugeordneten zonenbreiten Zungen und dazwischenliegenden Schlitzen besteht. Diese Schlitze haben eine Breite von 0,05 mm und werden mittels einer Drahterodiermaschine erzeugt. Die Herstellung dieser Schlitze ist jedoch nur einer von mehreren Arbeitsgängen, die bei der Herstellung des vorbekannten Dosiermessers notwendig sind. Nach der Herstellung der Schlitze wird nämlich beidseitig der Schlitze eine Materialabtragung vorgenommen, wodurch beidseitig eines jeden Schlitzes Vertiefungen entstehen, die etwa 1 mm vor der Vorderkante des Dosiermessers enden. Dann wird in einem weiteren Schritt eine metallische Beschichtung einer der beiden Schlitzseiten mit einem Material vorgenommen, das weicher als das Material des Farbmessers ist, wobei hier ein galvanischer Auftrag einer Kupferschicht bevorzugt ist. Die Dicke der aufzubringenden Kupferschicht muß geringfügig größer als die Breite des Schlitzes sein, was dadurch erreichbar ist, daß der galvanische Auftrag bei aufgespreizten benachbarten Zungen bewerkstelligt wird, woraufhin das überschüssige Material durch gegenseitges Bewegen der Zungen durch die jeweils nicht beschichtete Schlitzseite der Zungen abgeschert wird, so daß ein Schlitz entsteht, dessen Breite praktisch null ist. Schließlich werden in einem abschließenden Arbeitsgang die Vertiefungen, die im Bereich der Schlitze im zweiten Arbeitsgang durch Materialabtragung eingelassen wurden, mit einem elastischen Material ausgefüllt. Demzufolge wird bei dem aus dieser Druckschrift vorbekannten Dosiermesser jeder Schlitz nach seiner Herstellung durch eine Drahterodiermaschine derart verfüllt, daß die offene Schlitzbreite praktisch null ist.It is also known from DE-A-35 25 589 a metering meter for zone-wise metering of a color film on a roller in the inking unit of a highly viscous printing ink processing printing machine, which consists of a plate with resiliently flexible, zone-wide tongues and an intermediate slot assigned therebetween. These slots have a width of 0.05 mm and are created using a wire EDM machine. However, the production of these slots is only one of several operations which are necessary in the production of the known metering knife. After the slots have been produced, material is removed on both sides of the slots, as a result of which recesses are formed on both sides of each slot, which end approximately 1 mm before the front edge of the metering knife. Then, in a further step, a metallic coating of one of the two slit sides is carried out with a material which is softer than the material of the color knife, with a galvanic application of a copper layer being preferred here. The thickness of the copper layer to be applied must be slightly larger than the width of the slot, which can be achieved in that the galvanic application is carried out with adjacent tongues spread out, whereupon the excess material is sheared off by the tongues side of the tongues not coated by mutual movement of the tongues , so that a slot is created, the width of which is practically zero. Finally, in a final work step, the depressions that were made in the area of the slots in the second work step by material removal are filled with an elastic material. Accordingly, in the case of the metering knife known from this publication, each slot is filled by a wire EDM machine after it has been produced in such a way that the open slot width is practically zero.

Desweiteren sind Dosiermesser bekannt, welche aus einer federelastischen Platte bestehen, in die Schlitze eingearbeitet sind, wie aus der DE-A 22 28 625 hervorgeht. Die Schlitze weisen hierbei aber eine derartig große Breite auf, daß sie mit einem weichelastischen Abdichtungsmaterial aufgefüllt werden müssen, um eine Dichtheit gegen das Auslaufen der Farbe zu erhalten. Auch zur Herstellung dieses Dosiermessers ist der Aufwand relativ groß, und zudem ist ein Einfluß der Verstellbewegung der einen Zunge auf die benachbarte, nicht zu verstellende Zunge nicht auszuschließen.Furthermore, metering knives are known which consist of a resilient plate into which slots are incorporated, as can be seen from DE-A 22 28 625. However, the slots have such a large width that they have to be filled with a soft elastic sealing material in order to maintain a seal against the leakage of the paint. The effort involved in producing this metering knife is also relatively large, and an influence of the adjustment movement of the one tongue on the adjacent tongue that cannot be adjusted cannot be ruled out.

Der Erfindung liegt die Aufgabe zugrunde, ein Dosiermesser der eingangs bezeichneten Art bzw. ein Verfahren zu seiner Herstellung so weiterzuentwickeln, daß sich die Fertigung vereinfacht und trotzdem eine ausreichende Dichtheit gegenüber dem Durchtritt von Farbe gewährleistet ist.The invention is based on the object of further developing a metering knife of the type mentioned at the outset or a method for its production in such a way that the production is simplified and nevertheless sufficient sealing against the passage of paint is ensured.

Eirfindungsgemäß erfolgt die Lösung der Aufgabe durch die im Kennzeichen des Anspruchs 1 bzw. im Anspruch 3 enthaltenden Merkmale.According to the invention, the object is achieved by the features contained in the characterizing part of claim 1 or in claim 3.

Es hat sich herausgestellt, daß sich in vorteilhafter Weise die Breite der Schlitze im Bereich von 0,01 mm bis 0,03 mm bewegt. Bei einer derartigen Breite des Schlitzes ist die Leckage für Farben von höherer Viskosität praktisch unterbunden und trotzdem ist eine Verstellbewegung der einzelnen zonenbreiten Zungen ohne geringsten Einfluß auf deren benachbarte Zungen gewährleistet.It has been found that the width of the slots advantageously ranges from 0.01 mm to 0.03 mm. With such a width of the slot, the leakage for paints of higher viscosity is practically prevented and nevertheless an adjustment movement of the individual zone-wide tongues is ensured without the slightest influence on their adjacent tongues.

Schlitze mit diesen geforderten Breiten werden durch Laserschneiden in die Platte eingebracht. Dieses Ferti gungsverfahren ist sehr einfach zu realisieren und erfordert keine weitere Nachbearbeitung, wie sie bisher üblich war, insbesondere zum Abdichten der Schlitze.Slots with these required widths are made in the plate by laser cutting. This ferti tion process is very easy to implement and does not require any further post-processing, as was previously customary, in particular for sealing the slots.

Um eine wirkungsvolle Verstellung der einzelnen zonenbreiten Zungen zu erhalten, ohne daß die Beanspruchung des Materials oder die aufzubringenden Verstellkräfte übermäßig werden, weisen die Schlitze etwa eine Länge von zwei Drittel der Plattenbreite auf, bei einer Plattenbreite von beispielsweise 8 cm.In order to obtain an effective adjustment of the individual zone-wide tongues without the stress on the material or the adjustment forces to be applied being excessive, the slots have a length of approximately two thirds of the panel width, with a panel width of, for example, 8 cm.

In vorteilhafter Weise beträgt die Plattendicke etwa ein bis drei Millimeter, damit einerseits bei maximaler Verstellung der Schlitz nicht geöffnet wird, andererseits aber die erforderlichen Festigkeitsanforderungen erfüllt werden.The plate thickness is advantageously about one to three millimeters, so that on the one hand the slot is not opened at maximum adjustment, but on the other hand the required strength requirements are met.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und im folgenden naher beschrieben.An embodiment of the invention is shown in the drawing and described in more detail below.

Es zeigt:

Fig. 1
eine schematische Darstellung der Dosiermesserverstellung
Fig. 2
eine Ansicht auf das Dosiermesser
Fig. 3
eine Ansicht auf die Dosierkante des Dosiermessers
Wie Fig. 1 zeigt, besteht das Dosiermesser aus einer Platte 1, die auf bekannte Art mit dem Dosiermesserbalken 2 verschraubt ist. Jede der zonenbreiten Zungen 3 der Platte 1 ist über ein Stellglied 4 individuell gegen die Walze 5 hin einstellbar. Der Spalt 6, der von der zonenbreiten Zunge 3 und der Walze 5 gebildet wird, bestimmt die Dicke des zonenbreiten Farbfilms, der von der Walze 5 an das nicht dargestellte Farbwerk der Druckmaschine abgegeben wird.It shows:
Fig. 1
a schematic representation of the metering adjustment
Fig. 2
a view of the meter
Fig. 3
a view of the metering edge of the metering knife
1 shows, the metering knife consists of a plate 1 which is screwed to the metering knife bar 2 in a known manner. Each of the zone-wide tongues 3 of the plate 1 can be individually adjusted against the roller 5 via an actuator 4. The gap 6, which is formed by the zone-wide tongue 3 and the roller 5, determines the thickness of the zone-wide ink film, which is delivered by the roller 5 to the inking unit, not shown, of the printing press.

In die Platte 1 sind, wie aus Fig. 2 ersichtlich ist, Schlitze 7 eingebracht, was beispielsweise mittels Laserschneiden erfolgen kann. Die Breite b der Schlitze 7 beträgt 0,01 mm bis 0,03 mm. Die Länge l der Schlitze 7 ist etwa 2 Drittel der Breite a der Platte 1. Die Schlitze 7 bilden somit die zonenbreiten Zungen 3 des Dosiermessers.As can be seen from FIG. 2, slots 7 are made in the plate 1, which can be done, for example, by means of laser cutting. The width b of the slots 7 is 0.01 mm to 0.03 mm. The length l of the slots 7 is approximately 2 thirds of the width a of the plate 1. The slots 7 thus form the zone-wide tongues 3 of the metering knife.

Fig. 3 zeigt die Verstellbarkeit der zonenbreiten Zungen 3 des Dosiermessers. Hieraus ist auch ersichtlich, dass die maximale Verstellung, wie sie mit der zonenbreiten Zunge 3 dargestellt ist, höchstens die Hälfte der Dicke d der Platte 1 betragen darf, damit die Schlitze 7 nie geöffnet werden und die Leckage praktisch ausgeschlossen ist.Fig. 3 shows the adjustability of the zone-wide tongues 3 of the metering knife. From this it can also be seen that the maximum adjustment, as with the zone-wide tongue 3 is shown, may be at most half the thickness d of the plate 1 so that the slots 7 are never opened and the leakage is practically excluded.

In Versuchen hat es sich auch gezeigt, dass eine geringe Leckage von Farbe sogar zulässig ist. Diese Farbe, die durch die einzelnen Schlitze austreten könnte, sammelt sich an der Dosierkante des Dosiermessers und wird von der Walze 5 mitgenommen.Tests have also shown that a slight leakage of paint is even permissible. This paint, which could escape through the individual slots, collects at the metering edge of the metering knife and is carried along by the roller 5.

Das Dosiermesser muss nach dem Einbringen der Schlitze 7 praktisch nicht mehr bearbeitet werden. Einzig die Dosierkante wird leicht überschliffen, was die einfache und billige Herstellung des Dosiermessers 1 unterstreicht.The metering knife practically no longer needs to be processed after the slots 7 have been introduced. Only the dosing edge is slightly ground, which underlines the simple and cheap manufacture of the dosing knife 1.

Claims (3)

  1. A metering blade for zone-by-zone metering of a film of ink on a roller in the ink unit of a printing machine, using high-viscosity printing ink, having a plate (1), which has resiliently bendable tongues (3), extending over the width of the zone, each allocated to an actuating element, and slots formed by laser beams between the tongues, characterised in that
    a) the slots (7) incorporated into the plate (1) have a width (b) in the range from 0.01 to 0.03 mm and prevent leakage of the ink without additional covering, that
    b) the length (l) of the slots (7) is approximately half to 2/3 of the width (a) of the plate, and that
    c) the thickness (d) of the plate (1) is at least twice as large as the maximum adjustment range of the tongues (3) extending over the width of the zone.
  2. A metering blade according to claim 1, characterised in that the plate (1) consists of a resilient material and has a thickness (d) of 1 to 3 mm.
  3. A method of producing a metering blade for the zone-by-zone metering of a film of ink on a roller in the ink unit of a printing machine, using high-viscosity printing ink, having resiliently bendable tongues (3), extending over the width of the zone, each allocated to an actuating element, and slots (7) lying therebetween, in which individual slots (7), the width (b) of which is 0.01 to 0.03 mm and the length (l) of which is approximately half to two thirds of the width (a) of the plate, are incorporated into a metering blade blank, in the form of a plate (1) made of a resilient material, the thickness (d) of which is at least twice as large as the maximum adjustment range of the tongues (3) extending over the width of the zone, wherein the incorporation is carried out by laser cutting, and in which only the metering edge or the metering blade is re-ground after the cutting or the slots (7).
EP89810949A 1988-12-28 1989-12-12 Duct blade for the zonal distribution of an ink film Revoked EP0376885B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3844138A DE3844138A1 (en) 1988-12-28 1988-12-28 DOSING METER FOR ZONING A COLOR FILM
DE3844138 1988-12-28

Publications (3)

Publication Number Publication Date
EP0376885A2 EP0376885A2 (en) 1990-07-04
EP0376885A3 EP0376885A3 (en) 1991-01-23
EP0376885B1 true EP0376885B1 (en) 1995-03-01

Family

ID=6370412

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89810949A Revoked EP0376885B1 (en) 1988-12-28 1989-12-12 Duct blade for the zonal distribution of an ink film

Country Status (2)

Country Link
EP (1) EP0376885B1 (en)
DE (2) DE3844138A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19525529C1 (en) * 1995-07-13 1996-06-05 Koenig & Bauer Albert Ag Method of mounting dosing device in rotary printing machine
NZ319097A (en) * 1995-10-19 1999-05-28 Sycolor Consulting Ag Ink knife for the ink duct roller of a printing machine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2161943A (en) * 1938-01-17 1939-06-13 Carl D Baue Ink fountain
US2837024A (en) * 1955-04-07 1958-06-03 John Waldron Corp Ink fountain blade
US3699888A (en) * 1971-09-13 1972-10-24 North American Rockwell Composite fountain blade construction for remote ink control system
DE2228625B2 (en) * 1972-06-13 1974-07-11 Roland Offsetmaschinenfabrik Faber & Schleicher Ag, 6050 Offenbach Ink box for printing machines
DE3525589C1 (en) * 1985-07-18 1986-04-30 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Ink knife for an ink fountain roller of a printing machine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Dubbel, Taschenbuch für den Maschinenbau, 1983 Springer Verlag *

Also Published As

Publication number Publication date
DE58909065D1 (en) 1995-04-06
DE3844138A1 (en) 1990-08-02
EP0376885A3 (en) 1991-01-23
EP0376885A2 (en) 1990-07-04

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