EP1389523B1 - Machine à imprimer ou à enduire - Google Patents

Machine à imprimer ou à enduire Download PDF

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Publication number
EP1389523B1
EP1389523B1 EP03017249A EP03017249A EP1389523B1 EP 1389523 B1 EP1389523 B1 EP 1389523B1 EP 03017249 A EP03017249 A EP 03017249A EP 03017249 A EP03017249 A EP 03017249A EP 1389523 B1 EP1389523 B1 EP 1389523B1
Authority
EP
European Patent Office
Prior art keywords
chamber
printing
coating
doctor blade
doctor
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.)
Expired - Lifetime
Application number
EP03017249A
Other languages
German (de)
English (en)
Other versions
EP1389523A1 (fr
Inventor
Guido Reschke
Jürgen Schölzig
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.)
Manroland AG
Original Assignee
Manroland 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 Manroland AG filed Critical Manroland AG
Publication of EP1389523A1 publication Critical patent/EP1389523A1/fr
Application granted granted Critical
Publication of EP1389523B1 publication Critical patent/EP1389523B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B41F31/08—Ducts, containers, supply or metering devices with ink ejecting means, e.g. pumps, nozzles
    • 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 printing machine or a coating machine.
  • a coating device of this kind is made EP 0 619 186 A1 for coating substrates with a coating fluid, such as paint or paint, known in a printing press.
  • This coating device consists of a pressure cylinder leading to the printing material, a forme cylinder and a metering system associated with the forme cylinder, formed from a screened applicator roller and a chambered doctor blade coupled to this applicator roller.
  • the interior of the chambered doctor blade is filled with coating fluid, in which a feed pump is connected on the line side to a reservoir for the coating fluid of the chambered doctor blade and a suction pump of the chambered doctor blade connected to this reservoir on the line side is arranged downstream.
  • the disadvantage here is that in the processing of certain coating fluids in the housing interior of the chambered blade a coating quality affecting foaming may occur.
  • This foaming arises for example by turbulence and / or temperature or pressure-related viscosity changes of the coating fluid in the housing interior (chamber) of the chambered doctor blade and / or in that on the wells or cells of the rotating rasterized application roller (anilox roller) air into the housing interior of the chambered doctor blade is "introduced".
  • This results in an insufficient filling of the wells (cells) on the circumference of the screened application roller which may for example lead to different layer thicknesses, different degrees of gloss or partially to defects on the substrate.
  • this coating device comprises a reservoir for the provision of a defined amount of coating liquid, eg paint or printing ink. From this reservoir, a supply line for the coating liquid leads to the chamber doctor blade, wherein in the supply line, a feed pump is integrated.
  • coating liquid eg paint or printing ink
  • a coating device which comprises a counter-pressure cylinder, a forme cylinder, an applicator roller with metering system and a circulation line system for a liquid medium received in a reservoir.
  • the circulating line system connected to the metering system has a supply and a return line with pumps.
  • the supply and return lines and at least the parts of the pump contacted by the medium are arranged so that they can be released quickly.
  • Umlauf With regard to the pressure conditions in Umlauftechnischs- or dosing no information can be found.
  • EP-A-0 461 426 a pressurized liquid ink delivery system for a planographic printing press.
  • the press includes a blanket cylinder, a plate cylinder, a dampening unit and an inking unit.
  • a metering roller of the inking unit, which is followed by a color roller train, a chamber doctor blade is assigned.
  • the chambered doctor blade is connected to a circulatory system with a reservoir for the ink.
  • a feed pump is arranged, which promotes the ink to the chamber of the chamber doctor blade under pressure. From the chamber doctor blade excess, under constant pressure ink flows by return line in the reservoir. The entire circulation system including reservoir is thus under pressure.
  • a pressure sensor is arranged, which is connected to a machine control. The machine control is connected in terms of circuitry with the feed pump.
  • the invention is based on the object to provide a printing or coating machine of the type described above, which avoids the disadvantages mentioned above, which allows more uniform filling of the cells on the screened applicator roll with coating fluid, in particular with an overpressure which can be generated in the chamber of a chambered doctor blade has a simple structure.
  • a first advantage of the coating device is due to the fact that a sensor coupled in circuit-wise with a machine control is arranged on the chambered doctor blade for detecting the overpressure in the chamber (housing interior).
  • the sensor is used in conjunction with the machine control (setpoint / actual value) to supply a coating or cleaning fluid by means of a feed pump into the chamber of the chambered doctor blade.
  • the supply of coating fluid to the chamber doctor blade during the coating job takes place continuously or by means of machine control and feed pump preferably intermittently.
  • an overpressure in the interior, in particular of the chamber, of the chamber doctor blade always remains constant, which is kept constant in an adjustable range.
  • Ensuring a defined overpressure improves the uniform filling of the cells located on an anilox roller or screened applicator roller and simultaneously counteracts the undesired entry of air into the chamber. Due to the overpressure in the chamber of the chambered doctor blade, the liquid medium, especially the coating fluid, is better pressed into the cells of the adjacent screened application roller and at the same time a liquid seal is formed outside the chambered doctor blade exposed lateral surface (with normal air pressure) of the application roller. This counteracts the "entrainment" of air into the chamber of the chambered doctor during the rotation of the rasterized applicator roll.
  • the feed pump is connected on the line side to a reservoir for the supply of the coating fluid and is arranged upstream of the chamber doctor blade. The return of excess coating fluid from the chambered doctor blade is done by the gravity principle and thus without a suction pump in this reservoir.
  • the screened application roller has an open grid structure in the form of cells or wells. Under an open grid structure is on the outer surface of the applicator roller interconnected arrangement (for example, by channels or a special screening) to understand cells or wells.
  • the speed energy resulting from the pressure energy in the chamber of the chambered doctor blade
  • a further advantage is that at least all lines (supply / return line) - preferably as a set - are arranged detachably within the coating device and, for example, when changing the coating fluid against preferably a second set of at least lines are interchangeable.
  • Such a set of lines is preferably cleanable outside the coating device and can be used again if necessary.
  • the respective chamber doctor blade is preferably additionally exchangeable and, if required, can be cleaned outside the coating device.
  • the lines and the chamber doctor blade are at least pre-cleaned within the coating device with a cleaning fluid. As a result, set-up times are noticeably reduced when changing the coating fluid within this device.
  • a plurality of line systems can be used if different coating media are used.
  • a line system can be used exclusively for one and the same coating medium.
  • the line systems - if necessary, including the pump parts and as needed the chambered doctor blade - for the respective coating medium.
  • a sheet-fed rotary printing machine is according to Fig. 1 shown in rows.
  • Several offset printing units for multi-color printing are strung together with printing cylinders and connected to each other with transfer cylinders or turning systems.
  • Fig. 1 shown partial view of such a printing machine is used, inter alia, the inline finishing.
  • Only a last offset printing unit I with a plate cylinder 10, a blanket cylinder 11 and a printing cylinder 1 as a sheet guiding cylinder is shown.
  • the plate cylinder 10 is associated with an inking unit and possibly a dampening unit, which will not be discussed in detail here.
  • the offset printing unit I is downstream in the conveying direction 6, a first coating unit II, for example, a painting or flexographic printing, which is formed by a forme cylinder 2 and a metering system 5.
  • the metering system 5 consists of a chambered doctor blade 4 and a screened applicator roller 3 operatively connected thereto.
  • the chambered doctor blade 4 extends with a chamber 24 which is open toward the applicator roller 3 parallel to the roller axis of the applicator roller 3 substantially over its full width.
  • a drying system 12 for example an infrared or UV dryer, which is assigned to an adjacent sheet guiding cylinder (printing cylinder 1 or transfer cylinder 9), is arranged downstream of the first coating unit II.
  • the drying system 12 is followed in the conveying direction 6 by a second coating unit II, for example a coating unit, with forme cylinder 2 and metering system 5, again formed by a chambered doctor blade 4 and a screened applicator roller 3.
  • the printing cylinder 1 of the offset printing units I, the coating units II and the dryer system 12 are by means of Transfer cylinder 9 interconnected for sheet transport.
  • the second coating unit II follows in the conveying direction 6, a boom 14, which feeds the sheet-shaped substrate by means of circulating conveyor system 13 in a known manner to a delivery pile and deposits there.
  • the blanket cylinder 11 in the offset printing unit I carries a blanket
  • the form cylinder 2 of the coating units II preferably carry a flexible high-pressure plate or a blanket.
  • the sheet guiding cylinders 1, 9, the forme cylinder 2 with associated, screened applicator roller 3 and the chambered doctor blade 4 are mounted in side frames 15.
  • the chamber doctor blade 4 is formed with a first and a second doctor blade (doctor blade) 22, 23. Further, the chambered doctor blade 4 has laterally arranged seals, so that a known interior, a chamber 24, for receiving a liquid medium, preferably of coating fluid, alternatively of cleaning fluid, and for simultaneous wetting of the screened applicator roll 3 (over the width ).
  • the chamber doctor blade 4 is preferably formed in the direction of rotation of the applicator roll 3, each with a positive and a negative on the lateral surface of the screened applicator roll 3 employed doctor blades 22, 23.
  • the chamber doctor blade 4 is coupled to at least one supply line 7 and at least one return line 8 for the supply of the coating fluid used.
  • feed and return lines 7, 8 can be arranged on the chambered doctor blade 4.
  • the supply line 7 is divided into a plurality of supply lines 7 (partial strands) which feed the liquid medium to the chambered doctor blade 4 at various locations (over the format width).
  • a plurality of partial strands of return lines 8 are preferably arranged on the chamber doctor blade 4, which open into a common return line 8 before immersion in a respective reservoir 17,18,19.
  • varnish e.g. aqueous dispersion varnish
  • printing ink e.g. Flexographic ink
  • it is a cleaning fluid processable.
  • the coating fluid is in the coating operation, alternatively in cleaning operation, constantly under an overpressure in the interior of the chambered doctor blade 4 and in the cells of the chamber 24 located in the area of the lateral surface of the screened, rotating applicator roller third
  • At the chambered doctor blade 4 at least one pressure sensor 21 is arranged, which is connected in circuit technology with a machine control 20 of the processing machine.
  • the machine control 20 is connected in terms of circuitry to a feed pump 16 which is arranged exclusively in a feed line 7 (or coupled to the feed line 7).
  • the pressure sensor 21 is used for preferably non-contact sensing of the pressure conditions in the chamber 24 of the chamber doctor blade 4.
  • a pressure sensor 21 submersible sensors for level measurement in the chamber 24 can be used.
  • the signals of the pressure sensor 21 can be processed by means of the machine control 20 and via this machine control 20, the feed pump 16 is operable.
  • an overpressure in a range of approximately 0 to 1.5 bar can be generated and the medium, coating fluid or cleaning fluid, by means of return line 8 by the principle of gravity in a reservoir 17, 18, 19 traceable.
  • the respective medium is always returned to the corresponding reservoir 17 or 18 or 19 of the return line 8 from which it was removed via the supply line 7.
  • the overpressure in the chamber 24 is individually adjustable manually or automatically depending on the liquid medium used. For example, a coating fluid having a lower gauge pressure and a cleaning fluid having a higher gauge pressure are fed to the chamber 24.
  • the chamber doctor blade 4 with feed and return line 7,8 is arranged quickly detachable.
  • a corresponding chamber doctor blade 4 and in particular a supply and return line 7, 8 are preferably interchangeable for each coating fluid.
  • the screened application roller 3 on the lateral surface on an open structure of cells.
  • Similar structures are known on a roll shell of Haschur engravings.
  • these cells are interconnected, so that the pressurized liquid medium, for example coating fluid, is received in these cells and in addition to the adjacent cells on the lateral surface the application roller 3 forms a fluid flow.
  • This fluid flow also takes place in the area of the doctor blades 22, 23, ie the doctor blades 22, 23 are underflowed by the respective fluid in the region of the cells and channels.
  • Rollers which can be used as raster application rollers 3 having such an open structure are, for example, from Praxair Surface Technologies, D-40880 Ratingen (head office: Praxair Inc., Danbury, USA), for example under the name TIF, ART, etc., known.
  • a throttle preferably a manually or automatically controllable valve for adjusting the flow rate can be arranged.
  • this valve is connected in circuit technology with the machine control 20.
  • Each reservoir 17-19 accommodates a liquid medium, preferably of a different kind.
  • the reservoir 17 has an aqueous dispersion varnish
  • the reservoir 18 a UV varnish
  • the reservoir 19 receives a cleaning fluid.
  • the number of Reservoir 17-19 is not limited to the present example.
  • the supply line 7, return line 8, the metering system 5, in particular the chamber doctor blade 4, as well as at least the parts of the feed pump 16, which are in contact with the respective liquid medium, are arranged quickly detachable within the coating device.
  • the entire circulating line system (supply line 7, return line 8), the chambered doctor blade 4 and depending on the order, the roaster applicator roller 3 and at least come into contact with the liquid medium parts of the feed pump sixteenth among themselves exchangeable for previously cleaned parts.
  • these elements can be quickly removed from the coating unit II and are interchangeable with another circulatory system (supply line 7, return line 8), another chamber doctor blade 4 and, if necessary, with an applicator roller 3 with a different pumping volume and at least the relevant parts of the feed pump 16.
  • feed line 7 and return line 8 can be brought into functional connection with the respectively associated reservoir 17 or 18 or 19.
  • the feed pump 16 is designed to switch to suction mode.
  • the feed pump 16 is preferably designed as a peristaltic pump with easily accessible pump head for changing the supply line 7 within the peristaltic pump.
  • a pulsation damper (depending on the type of pump) is arranged between the outlet of the feed pump 16 and the chambered doctor blade 4 in the feed line 7.
  • the supply and return line 7,8, the chamber doctor blade 4 and at least the parts of the feed pump 16 contacted by the medium, in particular coating fluid, can be cleaned within the coating device, for example with cleaning fluid fed from one of the reservoirs 17-19.
  • the supply and return line 7,8, the chamber doctor blade 4 and the relevant parts of the feed pump 16 outside the coating device can be cleaned.
  • the exemplified coating device is not limited to the above embodiment. Rather, such coating devices are also in coating machines - for example DE 298 18 148 U1 known - or in printing machines with printing units for multi-color printing combined with a coating device - for example EP 0 574 124 A1 , known - used. Alternatively, according to DE 197 29 985 A1 respectively. DE 197 29 977 A1 Coating equipment can be used directly in otherwise suitable for offset printing units of a printing press.

Claims (8)

  1. Machine d'impression ou d'enduction ayant un cylindre de contre-pression (1), un cylindre porte-clichés (2), un rouleau imprimeur tramé (3) et une chambre à racles (4) associée pouvant être mise en prise ou arrêtée et comportant une première et une seconde lames de racle (22, 23) et des délimitations latérales destinées à former une chambre ouverte (24) orientée vers le rouleau imprimeur (3) afin de recevoir un fluide liquide, une surpression pouvant être produite à l'intérieur de la chambre (24) et la chambre à racles pouvant être couplée à un système de conduite de circulation ayant une conduite d'amenée et une conduite de retour (7, 8) pour le fluide liquide présent dans un réservoir (17, 18, 19), machine dans laquelle :
    - un capteur de pression (21) est monté dans la chambre à racles (4) afin de détecter la surpression dans la chambre (24) et ce capteur de pression (21) est couplé à une commande de machine (20) de la machine d'impression ou d'enduction,
    - la commande de machine (20) est couplée à une pompe de circulation (16) agencée exclusivement dans la conduite d'amenée (7) et la surpression du fluide liquide présent dans la chambre (24) de la chambre à racles (4) peut être produite au moyen de la pompe de circulation (16),
    - les signaux du capteur de pression (21) peuvent être traités au moyen de la commande de machine (20) et la pompe de circulation (16) peut être actionnée par le biais de cette commande de machine (20), et
    - une soupape destinée au réglage du débit est montée dans la conduite de retour (8) et le fluide en excès peut être renvoyé au moyen de la conduite de retour (8), par gravité, de la chambre (24) vers le réservoir (17, 18,19).
  2. Machine d'impression ou d'enduction selon la revendication 1,
    caractérisée en ce que le rouleau imprimeur tramé (3) présente sur la surface d'enveloppe une structure de cellules ouvertes et reliées entre elles.
  3. Machine d'impression ou d'enduction selon la revendication 1,
    caractérisée en ce que la pompe de circulation (16) peut être commutée sur un mode aspiration.
  4. Machine d'impression ou d'enduction selon les revendications 1 et 3,
    caractérisée en ce que, avant un remplacement de la chambre à racles (4) et des conduites d'amenée et de retour (7, 8), un fluide liquide présent dans la chambre (24) peut être envoyé dans un réservoir correspondant (17, 18, 19).
  5. Machine d'impression ou d'enduction selon la revendication 1,
    caractérisée en ce que la pompe de circulation (16) est une pompe tubulaire contenant la conduite d'amenée (7).
  6. Machine d'impression ou d'enduction selon au moins la revendication 1,
    caractérisée en ce que les conduites d'amenée et de retour (7, 8), la chambre à racles (4) ainsi qu'au moins les parties de la pompe de circulation (16) en contact avec le fluide peuvent être nettoyées en dehors du dispositif d'enduction.
  7. Machine d'impression ou d'enduction selon au moins la revendication 1,
    caractérisée en ce que la première lame de racle (22), en tant que racle de fermeture, et la seconde lame de racle (23), en tant que racle de travail, de la chambre à racles (4) adhèrent, dans le sens de rotation de celui-ci, au rouleau imprimeur tramé (3) pouvant être commandé.
  8. Machine d'impression ou d'enduction selon la revendication 1,
    caractérisée en ce que la soupape est reliée à la commande de machine (20).
EP03017249A 2002-08-14 2003-07-30 Machine à imprimer ou à enduire Expired - Lifetime EP1389523B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10236781A DE10236781B4 (de) 2002-08-14 2002-08-14 Beschichtungseinrichtung für eine Druck- oder Beschichtungsmaschine
DE10236781 2002-08-14

Publications (2)

Publication Number Publication Date
EP1389523A1 EP1389523A1 (fr) 2004-02-18
EP1389523B1 true EP1389523B1 (fr) 2009-09-09

Family

ID=30469694

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03017249A Expired - Lifetime EP1389523B1 (fr) 2002-08-14 2003-07-30 Machine à imprimer ou à enduire

Country Status (3)

Country Link
EP (1) EP1389523B1 (fr)
AT (1) ATE442255T1 (fr)
DE (2) DE10236781B4 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1593504A1 (fr) 2004-05-04 2005-11-09 Müller Martini Holding AG Dispositif avec bâti et unité d'application d'un revêtement relié à ce dernier
DE102008011007B4 (de) * 2008-02-25 2011-11-17 Technotrans Ag Farbschonende Farbversorgung von Druckmaschinen
DE102008022988A1 (de) 2008-05-09 2009-11-12 Manroland Ag Fluidzuführ-Anordnung für eine Druckmaschine
ITVR20120185A1 (it) * 2012-09-13 2014-03-14 Uteco Converting Spa Dispositivo di inchiostrazione per macchine da stampa
DE102017212828A1 (de) 2017-07-26 2019-01-31 Koenig & Bauer Ag Vorrichtung zum Beschichten von Nutzen, eine Druckmaschine und Verfahren zum Beschichten von Nutzen

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5088402A (en) * 1990-06-07 1992-02-18 Rockwell International Corporation Pressurized printing fluid input system for keyless lithographic printing
AU632956B2 (en) * 1990-08-31 1993-01-14 Goss Graphic Systems, Inc. Keyless printing system for keyless lithographic printing
US5207159A (en) * 1991-08-30 1993-05-04 Howard W. DeMoore Coating apparatus for sheet-fed, offset rotary printing presses
DE4137337A1 (de) * 1991-11-13 1993-05-19 Sengewald Karl H Gmbh Hochdruckverfahren und auftragsvorrichtung zu seiner durchfuehrung
DE4311834C2 (de) * 1993-04-08 2001-02-01 Roland Man Druckmasch Einrichtung zum Beschichten von Bedruckstoffen in Druckmaschinen
US5425809A (en) * 1993-06-17 1995-06-20 Howard W. DeMoore Anilox coater with brush
DE19729985C2 (de) * 1997-07-12 2002-04-11 Roland Man Druckmasch Vorrichtung zum Lackieren von Bedruckstoffen in einem Offsetdruckwerk einer Rotationsdruckmaschine
DE19729977C2 (de) * 1997-07-12 2001-12-06 Roland Man Druckmasch Offsetdruckwerk zum Lackieren von Bedruckstoffen in einer Rotationsdruckmaschine
DE19757094A1 (de) * 1997-12-20 1999-06-24 Roland Man Druckmasch Einrichtung zum Beschichten von Bedruckstoffen in einer Druckmaschine
EP0958920A1 (fr) * 1998-05-22 1999-11-24 Fischer & Krecke Gmbh & Co. Machine à imprimer
DE29818148U1 (de) * 1998-10-10 2000-02-17 Roland Man Druckmasch Beschichtungsmaschine zum Veredeln von Bogenmaterial
DE29913778U1 (de) * 1999-08-06 1999-09-30 Roland Man Druckmasch Beschichtungseinrichtung in einer Druckmaschine

Also Published As

Publication number Publication date
DE10236781A1 (de) 2004-02-26
DE50311884D1 (de) 2009-10-22
EP1389523A1 (fr) 2004-02-18
DE10236781B4 (de) 2009-11-19
ATE442255T1 (de) 2009-09-15

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