EP1907210B1 - Chambre de racle - Google Patents

Chambre de racle Download PDF

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Publication number
EP1907210B1
EP1907210B1 EP06762668A EP06762668A EP1907210B1 EP 1907210 B1 EP1907210 B1 EP 1907210B1 EP 06762668 A EP06762668 A EP 06762668A EP 06762668 A EP06762668 A EP 06762668A EP 1907210 B1 EP1907210 B1 EP 1907210B1
Authority
EP
European Patent Office
Prior art keywords
inking
doctor blade
doctor
chamber
brace
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.)
Not-in-force
Application number
EP06762668A
Other languages
German (de)
English (en)
Other versions
EP1907210A1 (fr
Inventor
Frank Hasselmann
Lutz Telljohann
Frank Dirksmeier
Klaus Gräler
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.)
Windmoeller and Hoelscher KG
Original Assignee
Windmoeller and Hoelscher 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 Windmoeller and Hoelscher KG filed Critical Windmoeller and Hoelscher KG
Publication of EP1907210A1 publication Critical patent/EP1907210A1/fr
Application granted granted Critical
Publication of EP1907210B1 publication Critical patent/EP1907210B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B41F31/027—Ink rail devices for inking ink rollers

Definitions

  • the invention relates to a Farbschrakel for acting on a ink transfer roller of a rotary printing machine with a fluid according to the preamble of patent claim 1 and a tool for pressing a doctor blade according to claim 13.
  • Such ink chamber doctor blade are used in various rotary printing machines, for example in flexographic or gravure printing machines.
  • Such ink chamber doctor blade usually consist of a running in the axial direction of the ink transfer roller and filled in the printing operation with color ink chamber.
  • a paint chamber doctor blade can also be filled with another fluid, for example with a cleaning liquid, if ink transfer rollers are to be cleaned.
  • On the long sides of this ink chamber two doctor blades are usually mounted, which are in operation with the ink transfer roller in contact. The two doctor blades limit a running in the axial direction of the ink transfer roller gap through which the paint can reach the surface of the ink transfer roller.
  • Ink chamber doctor blade are usually closed at the front also with sealing elements that prevent lateral leakage of the paint.
  • the system consisting of ink chamber, doctor blade, ink transfer roller and side seals, thus forms a closed system, which is usually supplied via feed lines color and removed via discharge lines color.
  • the ink chamber doctor blade is usually completely or at least to a large extent filled with color.
  • the ink transfer roller which cooperates in the manner described with the ink chamber doctor blade, the so-called anilox roller, which is provided at its outer periphery with numerous small wells. These wells, when in the area of the ink chamber doctor blade, are filled with paint and take it with them. So that only the wells are filled with color and not take other areas of the outer surface of the anilox color, one of the two doctor blade this excess color is removed from the anilox roller.
  • This doctor blade is therefore referred to as a work doctor blade.
  • the second doctor blade has only the function of completing the blade chamber to the outside and is referred to as a closing blade.
  • the anilox roller transfers the ink to the printing plates applied to the format roller, which in turn deliver the ink to the printing substrate.
  • Farbschakel / ink transfer roller systems are used.
  • the color-receiving ink transfer roller of the form cylinder which already carries the printing plates, which are incorporated as depressions in the outer surface of the forme cylinder.
  • the ink taken through these depressions is applied directly to the printing substrate.
  • the wells of a forme cylinder or the wells of an anilox roller which have given their color, carry air into the ink chamber doctor blade, which swirls there and complicates the renewed filling of the wells or wells with fresh ink.
  • This effect increases with increasing printing speed.
  • the beats DE 38 23 340 C1 to arrange at least one further doctor blade within the doctoring chamber.
  • the DE 198 00 840 A1 shows such an arrangement.
  • the ink chamber is subdivided into a plurality of subchambers by this further or these further doctor blade, so that the air / ink mixture remains in one subchamber, while in the one or more subchambers the cells are completely filled with fresh paint become.
  • such additional doctor blade can push the color in the wells or wells.
  • the US 3,239,925 discloses a doctoring chamber having three doctor blades. One of the blades forms a first ink reservoir with the doctor chamber wall. The remaining two knives include a second paint reservoir. For fixing the doctor blade with the doctor blade chamber are firmly screwed.
  • doctor blades are mounted in the ink chamber doctor blade.
  • third and more doctor blades are known, which are either screwed directly or which are held by clamping strips, wherein the retaining strips are screwed to the doctor chamber. The loosening and fastening of the screws for the purpose of replacing the one or more doctor blades, however, is time consuming.
  • the object of the present invention is to propose a Farbschhuntrakel, in which at least one further doctor blade with less effort in the doctor chamber is mounted and released again.
  • holding means for holding the at least one further doctor blade comprise a spring-biased against at least one counter-holder element, with which the further doctor blade is pressed against the anvil.
  • the doctor blade can be fixed by applying a force against the spring force, so that the prestressed element detaches from the anvil. Then, the other doctor blade can be applied to an outer surface of the counter-holder. After lifting the spring force counteracting force, the biased element sets against the other doctor blade and pushes the latter against the counterpart.
  • the counterforce to the spring force can be applied with a suitable tool or even without tools.
  • the further doctor blade can be removed.
  • the other doctor blade can be deducted by hand from the counterpart.
  • the counter-holder is designed as a single, extending in the axial direction of the ink transfer roller bar.
  • the preloaded element need only be lifted in the area of the counter-holder, in which the other doctor blade has not been brought into contact with the anvil. It can therefore be driven with a tool, such as a screwdriver along the counter-holder and be pushed directly behind the tool parts of the other doctor blade on the counter-holder.
  • This single counter-holder can be designed such that a plurality of doctor blades can be fixed to it.
  • a color chamber doctor blade according to the invention can also be operated without further doctor blades.
  • the counter-holder has a polygonal cross-section, wherein at least two edges are bevelled.
  • the contour of the counter-holder is preferably designed such that it can be circumscribed by a regular trapezoid.
  • the beveled edges lie on the slopes of the trapezoid.
  • areas of the other doctor blades can be placed so that the doctor blades are tilted out to the ink transfer roller and get sufficient support by the anvil and not bend away or bend.
  • the counter-holder With its bottom, which corresponds to the long of the two parallel side edge of the trapezoid, the counter-holder rests on the inner bottom of the ink chamber, so that the further doctor blade occupy a certain angle to the tangent of the outer circumference of the ink transfer roller.
  • Tests have shown that the optimum angle is between 30 and 60 degrees, in particular between 40 and 50 degrees.
  • the at least one counter-holder is screwed from the inside to the bottom of the ink chamber. In this way, can be dispensed with through holes in the walls of the ink chamber in the attachment of the counter-holder, which otherwise against oozing paint would have to be sealed. Such seals are always problematic and therefore avoid as possible.
  • the counter-holder comprises plastic material or a metal.
  • this counter-holder made of steel, in particular stainless steel (for example, NIROSTA ® ) exist.
  • a particularly preferred embodiment of the invention includes as the biased against the anvil member extending in the axial direction of the ink transfer roller plastic or metal strip.
  • a particularly simple assembly of the ink chamber doctor blade according to the invention can be achieved by the prestressed element is part of a component which encloses at least three sides of the counter-holder. These three sides are the bevels on which rests the other doctor blade and the bottom, with which the counter-holder rests on the lower level of the ink chamber.
  • the component is preferably a folded sheet, which consists of spring steel in a particularly advantageous embodiment. For attachment of the component no further fastening means are necessary, since it is clamped between the underside of the counter-holder and the bottom of the ink chamber.
  • a bias of the element is achieved by the bends are made by an angle which is smaller than the angle, which includes the underside of the counter-holder with the bevels.
  • a further fold may be attached to the element biased against the anvil such that the element abuts along a line on the anvil, but the line is spaced from the side edge of the element. In this way, a kind of funnel is created, which facilitates the insertion of the further doctor blade.
  • the doctor blade comprises plastic and / or metal in an advantageous embodiment.
  • the other doctor blade which, as described above, the ink chamber blade does not have to seal against the environment, can made of very flexible material.
  • a flexible material may already be detected by clamping between regions and the counter-biased element, while other regions of the doctor blade are not yet covered by temporary formation of waves or distortions. Therefore, the blade can be mounted section by section, which further facilitates the assembly.
  • the at least one further doctor blade is preferably to be pressed against the counter-holder with a force of between 2 and 20 N / cm, in particular with a force of between 6 and 12 N / cm.
  • the static frictional force with which the doctor blade is held on the counter-holder is preferably between 10 and 60 N, in particular between 25 and 40 N.
  • This tool comprises guide elements which can be guided in at least one complementary guide of the ink chamber doctor blade, in particular in a guide of the counter-holder described above.
  • the guide elements or the guide elements may be a guide profile which can be guided in a complementary profile of the ink chamber doctor blade.
  • the guide profile may be rectangular in cross-section, wherein the complementary profile may then be a channel with laterally limiting webs.
  • guide elements can also be attached to the tool wheels or rollers, which run on rails or in grooves.
  • the guidance of the ink chamber doctor blade extends in the longitudinal direction of the ink chamber doctor blade, which corresponds to the axial direction of the ink transfer roller, to which the ink chamber doctor blade is adjustable.
  • this tool comprises means for providing a force on a side edge of the doctor blade, in particular on the edge of a third or further doctor blade.
  • the edge means the edge, which runs in the longitudinal direction of the knife or the ink chamber doctor blade.
  • a force is exerted in regions on the side edge of the doctor blade, which force can be used to push this blade against resistance and / or to overcome this resistance.
  • this tool is used to introduce another, non-sealing doctor blade in retaining means of the ink chamber blade described above, without the biased element would have to be lifted with another tool from the counter-holder.
  • the means for providing a force on the side edge of the doctor blade comprise a body which is provided with a groove.
  • the body is to be placed on the doctor blade such that the groove at least partially surrounds the doctor blade.
  • the bottom of the groove can exert a force on the side edge of the doctor blade.
  • the depth of the groove is chosen so that the doctor blade does not try to avoid by bending the force.
  • the body is advantageously made of plastic, in particular from a plastic which polytetrafluoroethylene, known as Teflon ® contains.
  • a plastic which polytetrafluoroethylene, known as Teflon ® contains.
  • Teflon ® polytetrafluoroethylene
  • Such a plastic has a high strength, but only a low static friction. But it can also be provided other plastics, such as polyethylene.
  • Fig. 1 shows a Farbhuntrakel 1, which includes a paint chamber 2.
  • two doctor blades 3, 4 are placed and fixed by means of clamping rails 5, 6 to the ink chamber 2.
  • the doctor blades 3, 4 are in contact with the ink transfer roller 7, so that doctor blade 3, 4, ink chamber 2 and the ink transfer roller 7 define a cavity 8.
  • the cavity 8 is in the printing operation usually completely or at least to a large extent filled with color.
  • the direction of rotation of the ink transfer roller 7 in the printing operation which may be an anilox roller, is symbolized by the arrow A.
  • a beam-shaped counter-holder 9 is arranged in the axial direction of the ink chamber doctor blade 1.
  • the ink chamber has to its bottom an axially extending recess into which the counter-holder 9 can be inserted.
  • this through-holes 10 through which screws, not shown, can be inserted, which in turn can be screwed into corresponding blind holes of the ink chamber 2.
  • the counter-holder 9 has a polygonal cross-section in the illustrated embodiment. At the base, with which the counter-holder rests on a plane of the ink chamber 2, close to side surfaces which are arranged substantially perpendicular to the base.
  • the inclination angle of the two inclined surfaces can each have the same or different amounts.
  • the inclination angle is defined as the angle between the tangent to the outer circumference of the ink transfer roller in FIG the point at which the further doctor blade 13 rests with the ink transfer roller, and the plane of the inclined surface 11, 12.
  • the further doctor blade 13 is held by a clamping element 14 in contact with the inclined surface 11. This clamping element 14 is resiliently biased against the inclined surface 11.
  • the direction of this spring force is indicated by the arrow B (see FIG. 2 ).
  • the clamping element 14 also has an edge 15, so that the clamping element 14 rests against the counter-holder 9 or the further doctor blade 13 along a line running in the axial direction of the ink-transfer roller 7.
  • the edge 15 is so pronounced that the end region 16 of the clamping element 14 protrudes from the inclined surface 11 of the counter-holder 9 and forms with this a funnel, in which the further doctor blade 13 can be inserted during assembly.
  • a clamping element On the inclined surface 12 is also located on a clamping element, which can serve to fix a further doctor blade.
  • the inking chamber doctor blade shown can be operated with no further, with a further or two further doctor blades.
  • Both clamping elements are made of a metal sheet, which is guided around the underside of the counter-holder, so that with the attachment of the counter-holder 9 to the ink chamber 2 and the clamping elements are fixed.
  • FIG. 3 shows the one Farbschschrakel 1, which has been removed from the ink transfer roller and in which the other doctor blade is replaced by a new one.
  • a slide-on tool 20 is used. This consists of a body 21, which comprises a lower, planar surface 22 of a certain width C. With this surface 22, the Aufschiebetechnikmaschine 20 is on a likewise flat surface 23 of a introduced into the counter-holder, extending in the axial direction recess 24.
  • the width of the recess is minimally greater than the width C of the surface 22, so that the Aufschiebetechnikmaschinemaschine 20 along the recess 24 can be performed in a straight line.
  • the operator can exert on the handle 25 a compressive force on the Aufschiebetechnikmaschine so that this with the Surface 22 always rests on the surface 23.
  • the body 21 has at one of its side surfaces a groove 26 which is inclined relative to the side surface of the body obliquely.
  • the lower inner surface of the groove 26 lies in the plane of the inclined surface 11, when the Aufschiebetechnikmaschine 20 rests with the surface 22 completely on the surface 23.
  • the depth of the groove is dimensioned such that the width of the doctor blade 13 is greater than the distance between the edge 15 and the bottom 27 of the groove.
  • the slip-on tool 20 shown comprises only one groove.
  • the push-on tool 20 simply rotated by 180 degrees, is placed on the surface 23 again.
  • Aufschiebetechnikmaschinemaschine with two or more grooves, so that several doctor blades can be mounted in one operation.
  • Through Hole 11 sloping surface 12 sloping surface 13 another doctor blade 14 clamping element 15 edge 16 End region of the clamping element 17 poetry 18 19 20 sliding tool 21 body 22 flat surface 23 surface 24 deepening 25 handle 26 groove 27 Bottom of the groove A.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)

Claims (16)

  1. Racle de chambre d'encre (1) avec un rouleau de transfert d'encre (7) pour charger le rouleau de transfert d'encre (7) d'une rotative avec un fluide, en particulier en encre d'impression, où la racle de chambre d'encre (7) présente les caractéristiques suivantes:
    - une chambre d'encre (2) s'étendant dans la direction axiale du rouleau de transfert d'encre (7) et remplie d'encre en cours de fonctionnement,
    - deux couteaux de racle (3, 4) s'étendant dans la direction axiale du rouleau de transfert d'encre (7) et en contact direct, en cours de fonctionnement, avec le rouleau de transfert d'encre (7),
    où est introduit dans la racle de chambre d'encre (1) au moins un autre couteau de racle (13) qui est fixé avec des moyens de retenue (9, 14) à l'intérieur de la chambre d'encre (2),
    caractérisée en ce que
    les moyens de retenue (9, 14) comprennent au moins un élément (14) précontraint par une force de ressort contre au moins un contre-organe de retenue (9) au moyen duquel l'autre couteau de racle (13) est pressé contre le contre-organe de retenue (9).
  2. Racle de chambre d'encre (1) selon la revendication 1,
    caractérisée en ce qu'
    au moins un contre-organe de retenue (9) est une poutre individuelle s'étendant dans la direction axiale du rouleau de transfert d'encre (7).
  3. Racle de chambre d'encre (1) selon l'une des revendications précédentes,
    caractérisée en ce qu'
    au moins un contre-organe de retenue (9) présente une section transversale polygonale, où au moins deux arêtes sont chanfreinées.
  4. Racle de chambre d'encre (1) selon l'une des revendications précédentes,
    caractérisée en ce qu'
    au moins un contre-organe de retenue (9) comprend à sa surface orientée vers le rouleau de transfert d'encre (7) au moins une rainure (24) s'étendant dans la direction axiale du rouleau de transfert d'encre (7).
  5. Racle de chambre d'encre (1) selon l'une des revendications précédentes,
    caractérisée en ce qu'
    au moins un contre-organe de retenue (9) peut être relié depuis l'intérieur de la chambre d'encre (2) à celle-ci.
  6. Racle de chambre d'encre (1) selon l'une des revendications précédentes,
    caractérisée en ce qu'
    au moins un contre-organe de retenue (9) est réalisé au moins partiellement en matériau synthétique et/ou en métal.
  7. Racle de chambre d'encre (1) selon l'une des revendications précédentes,
    caractérisée en ce que
    l'élément (14) précontraint contre le contre-organe de retenue (9) comporte une bande de matériau synthétique ou de métal s'étendant dans la direction axiale du rouleau de transfert d'encre (7).
  8. Racle de chambre d'encre (1) selon l'une des revendications précédentes,
    caractérisée en ce que
    l'élément (14) précontraint contre le contre-organe de retenue (9) entoure au moins trois faces extérieures du contre-organe de retenue (9).
  9. Racle de chambre d'encre (1) selon l'une des revendications précédentes,
    caractérisée en ce que
    l'élément (14) précontraint contre le contre-organe de retenue (9) est en contact le long d'une ligne (15) avec l'autre couteau de racle (13) ou avec le contre-organe de retenue (9).
  10. Racle de chambre d'encre (1) selon l'une des revendications précédentes,
    caractérisée en ce que
    l'autre couteau de racle (13) comprend au moins partiellement du matériau synthétique et/ou du métal.
  11. Racle de chambre d'encre (1) selon l'une des revendications précédentes,
    caractérisée en ce que
    la force de ressort est comprise entre 2 et 20 N/cm, de préférence entre 6 et 12 N/cm.
  12. Racle de chambre d'encre (1) selon l'une des revendications précédentes,
    caractérisée en ce que
    l'autre couteau de racle (13) peut être retenu avec une force de frottement d'adhésion de 10 à 60 N, en particulier de 25 à 40 N, au contre-organe de retenue.
  13. Outil (20) pour enfoncer au moins un couteau de racle (13) dans des moyens de retenue (9, 14) d'une racle de chambre d'encre (1), où l'outil (20) comporte des éléments de guidage (22), qui peut être guidé dans au moins un guidage complémentaire (24) de la racle de chambre d'encre (1), et des moyens (26, 27) pour la mise à disposition d'une force sur une arête latérale du couteau de racle (13) lorsqu'au moins un élément de guidage (22) est en contact avec le guidage complémentaire (24), où le moyen pour la mise à disposition d'une force comporte un corps (21) avec une rainure (26) qui peut être guidé le long du couteau de racle (13) de sorte que le fond (27) de la rainure exerce sur des zones de l'arête latérale du couteau de racle (13) une force.
  14. Outil (20) selon la revendication précédente,
    caractérisé en ce que
    le corps (21) est au moins partiellement en matériau synthétique.
  15. Outil (20) selon l'une des trois revendications précédentes,
    caractérisé en ce que
    l'élément de guidage (22) et le moyen (26, 27) sont réalisés en une pièce pour la mise à disposition d'une force sur une arête latérale du couteau dé racle.
  16. Outil (20) selon l'une des revendications précédentes,
    caractérisé par une
    poignée additionnelle (25).
EP06762668A 2005-07-18 2006-07-10 Chambre de racle Not-in-force EP1907210B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102005034015 2005-07-18
DE102005040929A DE102005040929B4 (de) 2005-07-18 2005-08-30 Farbkammerrakel
PCT/EP2006/007032 WO2007009737A1 (fr) 2005-07-18 2006-07-10 Chambre a racle

Publications (2)

Publication Number Publication Date
EP1907210A1 EP1907210A1 (fr) 2008-04-09
EP1907210B1 true EP1907210B1 (fr) 2010-09-29

Family

ID=37460202

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06762668A Not-in-force EP1907210B1 (fr) 2005-07-18 2006-07-10 Chambre de racle

Country Status (5)

Country Link
US (1) US8347786B2 (fr)
EP (1) EP1907210B1 (fr)
AT (1) ATE482827T1 (fr)
DE (2) DE102005040929B4 (fr)
WO (1) WO2007009737A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140261032A1 (en) * 2013-03-15 2014-09-18 P. Kenneth Deneka Coating Head for Printers and Coaters

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3800411A1 (de) * 1988-01-09 1989-07-20 Frankenthal Ag Albert Farbwerk
DE3823340C2 (de) 1988-07-09 1995-12-07 Fischer & Krecke Gmbh & Co Kammerrakel für Rotations-Druckmaschinen
DE4117390C2 (de) * 1991-05-28 2003-11-06 Koenig & Bauer Ag Rakelbalken für ein Farbwerk einer Rotationsdruckmaschine
US5239925A (en) * 1992-06-02 1993-08-31 Ronald L. Harper Ink distribution apparatus
DE4320833C1 (de) * 1993-06-23 1994-09-22 Roland Man Druckmasch Verfahren und Vorrichtung zum Austausch eines Rakelblattes einer Kammerrakel für Rotationsdruckmaschinen
US5791248A (en) * 1997-03-27 1998-08-11 Paper Converting Machine Company Liquid supply unit for roll applicator and method
NL1006861C2 (nl) 1997-08-27 1999-03-02 Cornelis Gorter Kamerrakelsysteem.
DE19800840C2 (de) * 1998-01-13 2002-05-16 Koenig & Bauer Ag Vorrichtung zum Einfärben einer Walze
FR2793441B1 (fr) * 1999-05-11 2001-08-03 Saint Eloi Mecanique Outil Sa Dispositif pour l'encrage d'un anilox d'une machine a impression flexographique
DE10150488B4 (de) 2001-10-16 2005-08-04 Windmöller & Hölscher Kg Stirnseitige Abdichtung der Rakelkammer
SE526497C2 (sv) * 2003-12-30 2005-09-27 Akeboose Internat Ab Rakelbladssystem, rakelbladinspänningsanordning,kammarrakelsystem, tryckverk, förförande för att inspänna ett rakelblad och förfarande för att ansluta en inspänningsdel hos en kammarrakel

Also Published As

Publication number Publication date
DE502006007972D1 (de) 2010-11-11
EP1907210A1 (fr) 2008-04-09
US8347786B2 (en) 2013-01-08
DE102005040929A1 (de) 2007-02-01
ATE482827T1 (de) 2010-10-15
DE102005040929B4 (de) 2009-06-04
US20090266255A1 (en) 2009-10-29
WO2007009737A1 (fr) 2007-01-25

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