EP2033786A2 - Chambre d'encrage - Google Patents

Chambre d'encrage Download PDF

Info

Publication number
EP2033786A2
EP2033786A2 EP08009588A EP08009588A EP2033786A2 EP 2033786 A2 EP2033786 A2 EP 2033786A2 EP 08009588 A EP08009588 A EP 08009588A EP 08009588 A EP08009588 A EP 08009588A EP 2033786 A2 EP2033786 A2 EP 2033786A2
Authority
EP
European Patent Office
Prior art keywords
doctor
ink chamber
ink
sealing material
printing
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.)
Withdrawn
Application number
EP08009588A
Other languages
German (de)
English (en)
Other versions
EP2033786A3 (fr
Inventor
Rainer Wieland
Peter Schmitt
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.)
KBA Meprint AG
Original Assignee
KBA Metronic GmbH
KBA Metroprint AG
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 KBA Metronic GmbH, KBA Metroprint AG filed Critical KBA Metronic GmbH
Publication of EP2033786A2 publication Critical patent/EP2033786A2/fr
Publication of EP2033786A3 publication Critical patent/EP2033786A3/fr
Withdrawn legal-status Critical Current

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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 paint chamber with two short opposite end shields and two long opposite side elements, wherein in each case a doctor blade is arranged on the side elements in particular by means of a doctor bar.
  • the end shields and the side members form a frame or box enclosing a volume for receiving ink which can be transferred through the opening of the ink chamber between the two leading edges of the two doctor plates to a roller of a printing press.
  • Printing machines and varnishing machines for printing or varnishing sheet-shaped substrates have been used industrially for many years. Since the object of the invention can be used both in printing presses and in varnishing machines, therefore, all subsequent descriptions relate both to printing presses and to varnishing machines without limiting the general public.
  • One type of printing presses operates according to a rotary printing principle, such as flexographic printing, offset printing, high-pressure, gravure printing, etc., in which the printing original of the image to be printed is introduced in a lateral surface of one or more printing cylinders or clamped as a printing plate on the lateral surface of a printing cylinder , And during the printing process via a unwinding of the printing cylinder over its lateral surface the print image is transferred to the substrate either directly or via downstream transfer cylinders.
  • a rotary printing principle such as flexographic printing, offset printing, high-pressure, gravure printing, etc.
  • the printing original located on the printing cylinder is inked with one or more inking units so that with each revolution of the printing cylinder a uniform coloring of the ink-transferring areas of the print template over the entire print image, which ensures that a substantially constant print quality results in the substrate.
  • Decisive for a constant print quality is that regardless of the printing speed, the same amount of printing ink is always provided via the inking unit as a homogeneous color film on a coloring cylinder, from which the printing ink is transported via the printing original onto the printing substrate.
  • it is customary, for example by means of an anilox roller to remove a certain amount of ink from a paint chamber by the anilox roller with its lateral surface partially immersed in the ink chamber located in the ink and a rotation of the anilox roller about its cylinder axis a certain amount of ink is conveyed out of the ink chamber.
  • the anilox roller on its mantle surface on a plurality of wells, for example, wells or grooves, which receive the ink. Excess ink on the surface of the anilox roller is suitably scraped off by means of appropriate doctor plates when unscrewing the anilox roller from a paint chamber of the lateral surface of the anilox roller and remains in the ink chamber.
  • the anilox roller Because the total volume of all depressions or wells of the anilox roller can be predetermined during its production, it is possible to remove only a certain amount of ink from the ink chamber in each case. In this type of color removal, however, poses the problem of sealing the ink chamber to the anilox roller, especially in the area of the top surfaces the screen cylinder at the front edges of the doctor plates to the end shields of the ink chamber.
  • doctor plates rest under a bias on the lateral surface of the anilox roller and also must follow a possible imbalance of the anilox roller, it is not possible to connect the doctor plates firmly with the end side shields, so that a gap to the end shields remains, on which printing ink the ink chamber can escape.
  • the object of the invention is to provide a paint chamber with which a gap between a front side shield and the front edge of a doctor blade can be reliably and selectively closed.
  • the object of the invention is also to make the gap so closable that a mobility of the doctor plates is not or only slightly hampered.
  • a sealing material is arranged in the end shields relative to the end edges of the doctor plates, which can be pressed out in the direction of an end edge of a doctor blade from a front side shield and can be applied to the front edge.
  • the sealing material can preferably be introduced at least in the region of the end edges of the doctor blade in the end shields, if necessary. Also larger area.
  • Pushing out of an end shield in the direction of a front edge of a doctor blade can be done by a displacement and / or by a deformation of the sealing material, e.g. by means of a force or pressurization of this sealing material, so that the material thereby at least partially moves toward an end edge of a doctor blade and thus closes the gap between this edge and the front side shield.
  • a device can be arranged in a front side shield, by means of which the sealing material can preferably be acted upon by a force / pressure in each case from one side facing away from the doctor blade laminations. As a result, the material is displaced and / or deformed, so that the gap is sealed.
  • the material itself is preferably an elastic material to provide the sealing properties. It can be made of rubber, an elastomer, rubber or a composite material.
  • Such a construction can be used in color chambers with fixed doctor blades as well as in such color chambers, in which at least one of the doctor plates is movable to close a paint chamber, for example, to remove them from a holder of a printing unit.
  • each end face shield has a corresponding recess into which the material is sealed, in particular seamlessly embedded. This can be done in one embodiment so that its surface in a first position on the side facing the doctor blade flush with the surface of the end face shield.
  • the sealing material By means of a corresponding device on the side facing away from the doctor blade sheet of the sealing material, for example by means of an eccentric roller or an eccentric cam, the sealing material at least partially, for example. be shifted in its central region so far from its rest position to a second position and / or deformed, that its the doctor blade facing surface touches the front edge of the doctor blade and thereby the gap between front side shield and doctor blade is closed.
  • the schematic representation of a conventional ink chamber shows FIG. 1 ,
  • the ink chamber 1 comprises, for example, the side elements 3c and 3d which each of the doctor plates 3a and 3b are attached and the example in FIG. 2 shown end shields 2a and 2b.
  • the elements 2 a, 2 b, 3 c and 3 d together form a substantially rectangular, in particular frame-shaped attachment which defines an opening 30 downwards over the squeegee plates 3 a, 3 b and the front side shields 2 a, 2 b corresponding to the surface 7 a of the anilox roller 7.
  • the frame-shaped attachment can be attached to a holder 2c, which can be provided simultaneously for mounting the ink chamber in the printing press.
  • the size and shape of the opening 30 is adapted to the corresponding anilox roller 7 so that when placing the opening 30 on the lateral surface 7a of the anilox roller 7, the opening 30 is closed by the anilox roller.
  • this area 30 on the lateral surface 7a of the anilox roller 7 from the interior of the ink chamber 1 reaching ink 100 fills the introduced in the lateral surface 7a of the anilox roller 7 cups 70th
  • the surface 7a of the anilox roller 7 is scraped off by the doctor blade 3a and only an ink quantity 7b determined for the printing process remains in the cells 70.
  • the doctor plates 3a, 3b rest on the surface 7a of the anilox roller 7 under a certain mechanical tension to allow an optimal Abrakeln the ink 100 of the lateral surface 7a and thereby catch a possible imbalance of the anilox roller, it is not possible in particular the doctor plates at their front edges 31 a, 31 b firmly connected to the end shields 2 a, 2 b, so that in this area a gap between the end shields 2 a, 2 b and the blade plates 3 a, 3 b remains.
  • FIG. 3 and FIG. 4 schematically show a first inventive embodiment of a seal according to the invention a color chamber in a first position.
  • the ink chamber 1 comprises two end shields 2a and 2b and two side elements 3c and 3d with the doctor blade laminations 3a and 3b, which together form a substantially rectangular box in which a supply of printing ink 100 is located.
  • an opening 30 is formed, via which the ink 100 is transferred to an anilox roller 7.
  • the doctor plates 3a, 3b lie on the surface 7a of the anilox roller 7, so that the opening 30 is closed by the anilox roller 7.
  • Printing ink 100 which reaches the surface 7a of the anilox roller 7 in the interior of the ink chamber 1 in this area, also penetrates into the cups 70 located thereon and fills them.
  • the surface 7a of the anilox roller 7 is doctored off with the doctor blade plates 3a and 3b during unscrewing from the ink chamber 1 and excess ink 100 is retained in the ink chamber 1. In this way, only a certain, predetermined by the total volume of the cups 70 in the surface 7a of the anilox roller 7 amount of ink 100 is always transported from the ink chamber 1 and is available for the subsequent printing process.
  • the areas 5a, 5b between the end shields 2a and 2b and the front edges 31 a, 31 b of the doctor blade 3a, 3b are not or only insufficiently sealed, so that ink 100 in these areas escape from the ink chamber 1 uncontrolled and can get into the printing press.
  • the deformation / displacement can be exerted so strong that the respective surfaces of the flexible material 33a, 33b touch the edges 31a and 31b and close the openings 5a, 5b.
  • respective devices 40a, 40b in the end shields 2a, 2b are provided, which for example each consist of an eccentric 21 a, 21 b, which are rotatably mounted about a rotation axis 22a, 22b and whose lateral surfaces in each case on the associated flexible material 33a and Act 33b.
  • the eccentric rollers 21 a, 21 b shown in a first position in which no or only a minimal force on the flexible material 33 a, 33 b is applied, so that this is not or only slightly in the direction of the edges 31 a, 31 b shifts and / or is deformed and thus forms an opening 5a, 5b between the edges 31a, 31b and the flexible materials 33a, 33b.
  • FIG. 5 shows, in contrast, the respective eccentric rollers 21a, 21b in a second position in which a force is exerted on the respective flexible material 33a, 33b via their lateral surfaces, whereby this displaces as far as possible in the direction of the respective edges 31a, 31b and / or is deformed, that the openings 5a, 5b are closed.
  • the ink chamber 1 for example by means of a as in DE10349053 described device or another type Closed device for anilox roller, so the ink chamber as in FIG. 5 shown schematically and exemplarily removed from the printing unit and the anilox roller, without ink can escape down from a not or only insufficiently closed opening.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP08009588A 2007-09-04 2008-05-27 Chambre d'encrage Withdrawn EP2033786A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007041756A DE102007041756B4 (de) 2007-09-04 2007-09-04 Farbkammer

Publications (2)

Publication Number Publication Date
EP2033786A2 true EP2033786A2 (fr) 2009-03-11
EP2033786A3 EP2033786A3 (fr) 2010-11-03

Family

ID=40043970

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08009588A Withdrawn EP2033786A3 (fr) 2007-09-04 2008-05-27 Chambre d'encrage

Country Status (4)

Country Link
US (1) US8007090B2 (fr)
EP (1) EP2033786A3 (fr)
CN (1) CN101380842A (fr)
DE (1) DE102007041756B4 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007041755B4 (de) * 2007-09-04 2011-02-17 Kba-Metronic Aktiengesellschaft Farbkammer
DE102007041758A1 (de) * 2007-09-04 2009-03-05 Kba-Metronic Ag Farbkammer
DE102009039309B4 (de) 2009-08-31 2015-09-17 Kai Schneider Vorrichtung mit Dichtstrang, Vorrakel und Schmierung als Enddichtung zwischen Druckzylinder und Farbwanne einer Rotationsdruckmaschine
DE102018207012A1 (de) * 2017-05-31 2018-12-06 Heidelberger Druckmaschinen Ag Farbkasten

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10349053A1 (de) 2003-09-12 2005-04-07 Metronic Ag Farbkammer

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4001733A1 (de) * 1990-01-22 1991-07-25 Windmoeller & Hoelscher Rakelvorrichtung fuer ein spuelfarbwerk einer rotationsdruckmaschine
DE4414681A1 (de) * 1993-05-27 1994-12-01 Roland Man Druckmasch Kammerrakel
FR2705613B1 (fr) 1993-05-27 1995-11-24 Roland Man Druckmasch Racle à chambre.
DE9405883U1 (de) * 1993-10-08 1994-06-09 Bööse, Ake, Lidingö Vorrichtung zum Abdichten des Endes einer Kammerrakel für Druckwerke
DE19631301A1 (de) 1996-08-02 1998-02-05 Gorter Cornelis Farbkammerrakel für eine Druckmaschine
DE19734910A1 (de) * 1997-08-12 1999-02-18 Windmoeller & Hoelscher Rakelvorrichtung für ein Spülfarbwerk einer Rotationsdruckmaschine
EP0941845A1 (fr) * 1998-03-07 1999-09-15 Fischer & Krecke Gmbh & Co. Dispositif d'étanchéité pour une racle à chambre
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
DE10302288B4 (de) * 2003-01-22 2007-02-08 Koenig & Bauer Ag Dichtschild
JP2005088586A (ja) 2003-09-12 2005-04-07 Metronic Ag インキ壺
SE527080C2 (sv) 2004-05-05 2005-12-20 Akeboose Internat Ab Anordning och förfarande för kammarrakel
DE102006009084A1 (de) * 2005-03-22 2006-09-28 Heidelberger Druckmaschinen Ag Anilox-Farbwerk einer Druckmaschine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10349053A1 (de) 2003-09-12 2005-04-07 Metronic Ag Farbkammer

Also Published As

Publication number Publication date
DE102007041756B4 (de) 2010-10-21
EP2033786A3 (fr) 2010-11-03
US20090058965A1 (en) 2009-03-05
US8007090B2 (en) 2011-08-30
CN101380842A (zh) 2009-03-11
DE102007041756A1 (de) 2009-03-05

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