EP1149700B1 - Système de dosage pour unité de revêtement dans une machine d'impression - Google Patents

Système de dosage pour unité de revêtement dans une machine d'impression Download PDF

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Publication number
EP1149700B1
EP1149700B1 EP01109264A EP01109264A EP1149700B1 EP 1149700 B1 EP1149700 B1 EP 1149700B1 EP 01109264 A EP01109264 A EP 01109264A EP 01109264 A EP01109264 A EP 01109264A EP 1149700 B1 EP1149700 B1 EP 1149700B1
Authority
EP
European Patent Office
Prior art keywords
roller
dosing system
plating device
coating fluid
plating
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
EP01109264A
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German (de)
English (en)
Other versions
EP1149700A2 (fr
EP1149700A3 (fr
Inventor
Peter Dipl.-Ing Hummel
Robert Dipl.-Ing. Ortner
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
MAN Roland Druckmaschinen 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 MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP1149700A2 publication Critical patent/EP1149700A2/fr
Publication of EP1149700A3 publication Critical patent/EP1149700A3/fr
Application granted granted Critical
Publication of EP1149700B1 publication Critical patent/EP1149700B1/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
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/08—Print finishing devices, e.g. for glossing prints

Definitions

  • the invention relates to a metering system for a coating unit, in particular for a coating unit, in a printing press according to the preamble of the main claim.
  • a dosing system of this kind is out DE 34 27 898 C1 known and used in particular in a coating unit.
  • the metering system has a forme cylinder, which is in functional connection with an applicator roller.
  • the application roller is associated with a metering roller and in the nip formed by the two rollers, the coating fluid is fed from above via a feed tube.
  • a separating element with communication openings can be inserted into the filled nip.
  • a dipping roller immersed in a paint reservoir is functionally connected to a dosing roller.
  • the metering roller leads the paint to a rubber-coated applicator roll, which acts as a forme cylinder.
  • a metering system is known in which the scooping roller immersed in the reservoir is drivable in reverse operation, wherein the scoop roller a scraper is employed as an additional metering.
  • a metering system which is formed by a forme cylinder, a screened applicator roll and a chamber doctor blade system operatively connected to this applicator roll.
  • the invention is based on the object to provide a metering system of the type mentioned that with little effort a uniform, stable guidance of a coating fluid, such as paint, achieved on at least one roller surface and noticeably improved the print quality.
  • a coating fluid such as paint
  • leading roller after tearing (shearing) of the coating fluid in a contact zone, such as a nip
  • a contact zone such as a nip
  • an uneven surface topography of the coating fluid such as paint before, which is characterized by peaks or crests and valleys of the coating fluid (eg paint tips, paint dome, paint valleys) on the lateral surface of a coating fluid leading roller.
  • a first advantage of the invention is based on the fact that in the case of an uneven surface topography (peaks, crests and valleys) of coating fluid, eg paint, which results from a preceding tearing off of the coating fluid, at least one plating device carrying the coating fluid is assigned to at least one plating device on the circumferential side.
  • the plating device causes a shape change (plastic shaping) of the peaks and valleys within the present surface structure of the coating fluid.
  • the change in shape represents a micro-reshaping of the surface structure of the coating fluid.
  • the tips slide into the valleys, ie slipping processes that effect the plastic shaping occur within the coating fluid layer layer, so that an approximately flat surface topography can be achieved in a defined layer thickness. It is advantageous in the case of plastic shaping by a plating device that the coating fluid is not subject to any shearing action (shearing or dicing action), since a shearing action in turn leads to an undesired tearing off of coating fluid and thus to an uneven surface topography.
  • the achieved by the plating relatively flat surface topography of coating fluid causes density fluctuations on the substrate are significantly reduced, so that the print / gloss or sealing quality is noticeably improved.
  • the result is a flat surface topography of the coating fluid on the lateral surface of the respective roller over the roll width, before the roller comes into contact with a subsequent contact zone (eg, a further cleavage site).
  • this uneven surface topography of the coating fluid is advantageously clearly leveled on the associated roller so that a uniform surface topography for uniform, stable coating fluid guidance in the metering system can be achieved.
  • the parameters which change during the printing process such as printing speed, temperature, amount of coating fluid, hydrodynamic pressure in the metering system and the viscosity of the coating fluid, are perceptibly reduced according to the invention by the use of at least one plating device as possible disturbance variables.
  • the plating device according to the invention is not limited to a roller of the metering system. Rather, the arrangement of plating is also in other, the coating fluid color leading rollers of a dosing realized. In this case, at least one plating device is preferably assigned to each roller. Alternatively, several plating can be arranged to form a roll.
  • the plating device serves to provide a relatively flat surface topography on the lateral surface of an associated, the coating fluid-carrying roller. In the area of the plating device a tearing off of coating fluid on the lateral surface of the corresponding roller is to be avoided, since otherwise again uneven surface topographies arise.
  • the formation of the plating device is not limited to one or more mechanical plating device (s) having one or more plating elements.
  • a compressed air or blowing air can be used on the outer surface of the roll carrying the coating fluid or an ultrasonic vibration system directed onto the coating fluid in order to achieve a plastic shaping.
  • a coating unit of a sheet-fed rotary printing press consists essentially of a sheet guiding cylinder 1 (printing cylinder), which transports the sheet material in the conveying direction 6, a forme cylinder 2 which can be brought into contact with the sheet guiding cylinder 1 and which has a printing form, e.g. a flexographic printing plate or a blanket, and a metering system 5.
  • the metering system 5 preferably has at least one circulation system for the circulation of coating fluid.
  • the metering system 5 is formed by a screened applicator roll 3 and a chamber doctor blade system 4 operatively connected to this applicator roll 3, wherein the applicator roll 3 is in functional connection with the forme cylinder 2 in a contact zone 13.
  • the metering system 5 is formed as a two-roll mill with an application roller 3 coupled to the forme cylinder 2 in the contact zone 13 and a metering roller 7.
  • the rollers 3, 7 form a common nip 12 with a reservoir 8 of a coating fluid fed from above.
  • the dosing system 5 as a scoop roller unit with an application roller 3 coupled to the forme cylinder 2 in the contact zone 13 and a scoop roller 9 immersed in a reservoir 10 for the coating fluid.
  • the scoop roller 9 is in contact with the applicator roller 3 in a roller nip 12.
  • At least the application roller 3 of the dosing system 5 is at least one plating device 11 after the contact zone 13 and / or a nip 12, in which or in which a demolition or a cleavage of coating fluid is carried out on the lateral surface of the jacket surface of the Application roller 3 adjustable and preferably assigned adjacent abettable.
  • the plating device 11 extends substantially parallel over a full roll width of the applicator roll third
  • a tearing or splitting of coating fluid is carried out at least one plating 11 on the lateral surface of the applicator roll 3 is parallel to and off arranged.
  • the plating device 11 is associated with the application roller 3, which is preferably in functional connection with a chamber doctor blade system 4.
  • the applicator roller 3 has a screening and the chamber doctor blade system 4 has in the interior of the chamber on a further plating 11, which on the applicator roller 3 on and off.
  • the plating device 11 is by means of a force F to the lateral surface of the applicator roll 3, alternatively also a metering or scooping roller 7.9, on or off.
  • a force F to the lateral surface of the applicator roll 3, alternatively also a metering or scooping roller 7.9, on or off.
  • the plating device 11 is preferably a uniform surface pressure over the roll width of the applicator roll 3 and the metering or scooping roller 7.9, on the after the contact zone 13 remaining (residual) coating fluid applied.
  • the plating device 11 in its direction tangent or secant on the lateral surface on or off.
  • Such a plating device 11 is preferably by a formed over the roll width, in the direction of rotation of the applicator roll 3, preferably tangentially (alternatively secant) positively employed plating element 14 which is detachably received in a holder 15 and extends in the axial direction over the entire roll width, at least parallel to the outer surface of the applicator roll 3 ,
  • the holder 15 of the plating element 14 is preferably mounted on both sides in a frame-mounted pivot 16, preferably pivotally mounted about the axis of the rotary joint 16.
  • the plating element 14 or the plating device 11 is in functional connection by means of at least one, preferably adjustable compression spring supported on the frame side.
  • the plating element 14 is preferably loaded by a force F.
  • a pneumatically actuated working cylinder or other means F generating means can be used instead of the compression spring.
  • the plating element 14 alternatively the plating device 11, by use of its own weight with the associated roller 3,7,9, at least with the applicator roller 3, in functional connection, without a shear effect on the lateral surface or the remaining coating fluid to produce
  • the plating device 11 is also arranged with a minimum distance to the lateral surface of the roller 3, 7, 9, at least to the application roller 3, in order to achieve a flat surface topography.
  • the plating element 14 ends with its free end preferably on a surface normal (tangent point or secant point) of the associated roller 3, 7, 9, at least the applicator roller 3.
  • the plating element leads 14 tangentially in the direction of rotation of the applicator roll 3 slightly beyond the lateral surface, wherein a tearing of coating fluid is to be avoided.
  • a free end of the plating element 14 ends at a slight distance from the lateral surface of the roller 3, 7, 9, at least the applicator roller 3.
  • the plating device 11 levels the uneven surface topography of the residual coating fluid remaining on the jacket surface of the applicator roller 3 after the contact zone 13 (applicator roller 3 and forme cylinder 2) before the remaining coating fluid comes into contact with the coating fluid newly supplied in the chamber doctor blade system 4 or nip 12.
  • a plating device 11 is not limited to an applicator roller 3 with or without screening. Rather, the arrangement of plating devices 11 can also be realized on other parts of the dosing system 5. Preferably, the arrangement of further plating devices 11 (in addition to at least one plating device 11 on the application roller 3) in the metering roller 7 or the scoop roller 9 can be realized.
  • the arrangement and design of the respective plating device 11 is analogous to that of the applicator roller 3 associated plating 11th
  • an arrangement of at least one attachable or detachable plating device 11 on the metering roller 7 or the scoop roller 9 in its direction of rotation can be realized.
  • at least one plating 11 of the applicator roll 3 and the applicator roller 3 is operatively connected to a metering roller 7 and the two rollers 3.7 form a nip 12 for receiving a reservoir 8 of coating fluid.
  • a further plating device is arranged parallel to the outer surface of the metering roller 7 and can be lowered.
  • At least one plating 11 of the applicator roll 3 is assigned and the applicator roll 3 is operatively connected to a scoop roller 9 immersed in a reservoir 10 and the two rollers 3.9 form a nip 12.
  • the respective plating device 11 in its direction tangent-shaped or secant to the lateral surface of the respective roller 7,9 on and off arranged.
  • a plating device 11 is also arranged within the chamber of the chamber doctor blade system 4 in addition to the plating 11 on the applicator roll 3.
  • the plating device 11 preferably supports the filling of the wells of the screened application roller 3 and prevents the penetration of air bubbles into the wells.
  • the plating device 11 may also be arranged immersed in the reservoir 8.
  • a calming of the flow in the reservoir 8 or nip 12 can be achieved.
  • the mode of action is as follows: Depending on the metering system 5 used, the supplied coating fluid, for example a lacquer, is located in the chamber doctor blade system 4 or in the nip 12. In the direction of rotation of the application roller 3, the coating fluid is metered onto the lateral surface and fed to the contact zone 13. In this contact zone 13 takes place on the principle of color separation (paint cleavage) a tear of coating fluid, so that a layer of defined thickness of the coating fluid remains as residual coating fluid on the applicator roll 3 and a film of coating fluid in a defined layer thickness is transferred to the forme cylinder 2.
  • the supplied coating fluid for example a lacquer
  • the remaining coating fluid is present as an uneven surface topography in the form of peaks, crests and valleys on the lateral surface of the applicator roller 3.
  • the application roller 3 now passes the preferably tangent-shaped or secant-type plating device 11, which effects the change in shape (plastic shaping) of the tips, crests and valleys.
  • the plating device 11 is "floating" by the weight or with a defined force on the lateral surface (with coating fluid) or is arranged at a slight distance from the lateral surface to achieve a flat surface topography.
  • the object according to the invention is based on the fact that in the direction of rotation of a roller 3, 7, 9 carrying a coating fluid, before and / or after a contact zone 13 or a nip 12 in which the coating fluid on the outer surface of these rollers 3, 7.9 is leveled by at least one plating device 11.
  • a leveling of the coating fluid preferably paint, can thus be carried out before the contact zone 13 or the nip 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Coating Apparatus (AREA)
  • Ink Jet (AREA)
  • Electrophotography Configuration And Component (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Claims (17)

  1. Système de dosage pour une unité d'enduction, notamment pour un poste d'encrage dans une machine à imprimer, avec au moins un cylindre gravé et un rouleau imprimeur en liaison fonctionnelle avec le cylindre gravé, en tant que partie d'un système de dosage et avec au moins une alimentation d'un fluide d'encrage, caractérisé en ce que,
    dans le sens de rotation du rouleau imprimeur (3), en aval d'une zone de contact (13) avec le cylindre gravé (2) ou une fente de rouleau (12), dans laquelle a eu lieu un décollement ou une scission de fluide d'encrage, pour aplanir le fluide d'encrage résiduel resté sur le rouleau imprimeur (3) avant l'alimentation renouvelée du fluide d'encrage, au moins un dispositif de placage (11) est disposé de sorte à pouvoir être mis en prise ou hors prise parallèle sur la surface d'enveloppe du rouleau imprimeur (3), le dispositif de placage permettant d'atteindre une conformation plastique de la structure superficielle du fluide d'encrage présent sur le rouleau imprimeur, de sorte à obtenir une topographie superficielle approximativement plane avec une épaisseur de couche définie.
  2. Système de dosage selon la revendication 1, caractérisé en ce que,
    dans le sens de rotation du rouleau imprimeur (3), également en amont de la zone de contact (13) avec le cylindre gravé (2) ou la fente de rouleau (12), dans laquelle a eu lieu un décollement ou une scission de fluide d'encrage, au moins un dispositif de placage (11) est disposé de sorte à pouvoir être mis en prise ou hors prise parallèle sur la surface d'enveloppe du rouleau imprimeur (3).
  3. Système de dosage selon au moins la revendication 1, caractérisé en ce que,
    dans le sens de rotation du rouleau imprimeur (3), le dispositif de placage (11) est disposé de sorte à pouvoir être mis en prise ou hors prise sous forme tangentielle ou sécante sur la surface d'enveloppe du rouleau imprimeur (3).
  4. Système de dosage selon au moins la revendication 1, caractérisé en ce que,
    un dispositif de placage (11) qui est en liaison fonctionnelle avec un système de chambre à racle (4) est associé au rouleau imprimeur (3).
  5. Système de dosage selon au moins la revendication 1 et 4, caractérisé en ce que,
    le rouleau imprimeur (3) comporte un tramage et le système de chambre à racle (4) comporte à l'intérieur de la chambre un dispositif de placage (11) supplémentaire, qui peut être mis en prise ou hors prise avec le rouleau imprimeur (3).
  6. Système de dosage selon au moins la revendication 1, caractérisé en ce que,
    un dispositif de placage (11) est associé au rouleau imprimeur (3), en ce que le rouleau imprimeur (3) est en liaison fonctionnelle avec un rouleau de dosage (7) et en ce que les rouleaux (3, 7) forment une fente de rouleau (12) pour recevoir un réservoir (8) de fluide d'encrage.
  7. Système de dosage selon la revendication 6, caractérisé en ce que,
    dans le sens de rotation du rouleau de dosage (7), en aval de la fente de rouleau (12), un dispositif de placage (11) est disposé de sorte à pouvoir être mis en prise ou hors prise parallèle sur la surface d'enveloppe du rouleau de dosage (7).
  8. Système de dosage selon au moins la revendication 1, caractérisé en ce que,
    un dispositif de placage (11) est associé au rouleau imprimeur (3) et en ce que le rouleau imprimeur (3) est en liaison fonctionnelle avec un rouleau barboteur (9) plongeant dans un réservoir de stockage (10) et en ce que les rouleaux (3, 9) forment une fente de rouleau (12).
  9. Système de dosage selon la revendication 8, caractérisé en ce que,
    dans le sens de rotation du rouleau barboteur (9), en amont de la fente de rouleau (12), un dispositif de placage (11) est disposé de sorte à pouvoir être mis en prise ou hors prise parallèle sur la surface d'enveloppe du rouleau de dosage (9).
  10. Système de dosage selon au moins la revendication 6 et 8, caractérisé en ce que,
    dans le sens de rotation du rouleau de dosage (7) ou du rouleau barboteur (9), le dispositif de placage (11) concerné est disposé de sorte à pouvoir être mis en prise ou hors prise sous forme tangentielle ou sécante dans sa direction sur la surface d'enveloppe des rouleaux concernés (7, 9).
  11. Système de dosage selon au moins la revendication 1, caractérisé en ce que,
    le dispositif de placage (11) est susceptible d'être mis en prise au moyen d'une force (E) sur la surface d'enveloppe des rouleaux (3, 7,9).
  12. Système de dosage selon au moins la revendication 1, caractérisé en ce que,
    au moyen du dispositif de placage (11), une pression superficielle régulière est applicable sur la largeur des rouleaux (3, 7, 9).
  13. Système de dosage selon au moins la revendication 1, caractérisé en ce que,
    dans le sens de rotation des rouleaux, (3, 7, 9), le dispositif de placage (11) comporte un élément de placage (14) qui s'étend sur toute la largeur des rouleaux et qui est disposé de façon amovible dans une fixation (15).
  14. Système de dosage selon la revendication 13, caractérisé en ce que,
    la fixation (15) est logée de part et d'autre dans une articulation rotoïde (16) stationnaire sur le châssis.
  15. Système de dosage selon la revendication 13, caractérisé en ce que,
    l'élément de placage (14) est en liaison fonctionnelle avec un ressort de pression, soutenu côté châssis.
  16. Système de dosage selon la revendication 13, caractérisé en ce que,
    une extrémité libre de l'élément de placage (14) se termine sous forme tangentielle ou sécante sur la surface d'enveloppe d'un rouleau (3, 7, 9,) dans un point tangentiel ou sécant.
  17. Système de dosage selon la revendication 13, caractérisé en ce que,
    une extrémité libre de l'élément de placage (14) se termine à une faible distance par rapport à la surface d'enveloppe des rouleaux (3, 7, 9).
EP01109264A 2000-04-26 2001-04-14 Système de dosage pour unité de revêtement dans une machine d'impression Expired - Lifetime EP1149700B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10020512 2000-04-26
DE10020512A DE10020512A1 (de) 2000-04-26 2000-04-26 Dosiersystem für eine Beschichtungseinheit in einer Druckmaschine

Publications (3)

Publication Number Publication Date
EP1149700A2 EP1149700A2 (fr) 2001-10-31
EP1149700A3 EP1149700A3 (fr) 2005-03-16
EP1149700B1 true EP1149700B1 (fr) 2008-03-05

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ID=7640030

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01109264A Expired - Lifetime EP1149700B1 (fr) 2000-04-26 2001-04-14 Système de dosage pour unité de revêtement dans une machine d'impression

Country Status (3)

Country Link
EP (1) EP1149700B1 (fr)
AT (1) ATE388016T1 (fr)
DE (2) DE10020512A1 (fr)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1267947A (en) * 1969-10-30 1972-03-22 Metal Box Co Ltd Improvements in inking apparatus for printing machines
JPS59142148A (ja) * 1983-02-03 1984-08-15 Komori Printing Mach Co Ltd 印刷物ニス塗り装置
JPS62113551A (ja) * 1985-11-13 1987-05-25 Mitsubishi Heavy Ind Ltd 平版印刷機の湿し装置
DE3643936A1 (de) * 1986-05-05 1987-11-12 Polygraph Leipzig Vorrichtung zum abheben einer changierenden brueckenwalze
DD282663A5 (de) * 1988-03-25 1990-09-19 Polygraph Leipzig Auftragwerk fuer druckmaschinen
DD278551A1 (de) * 1988-12-27 1990-05-09 Polygraph Leipzig Verfahren und einrichtung zum verarbeiten von spezialfarben in bogenoffsetdruckmaschinen
US6435086B1 (en) * 1995-05-04 2002-08-20 Howard W. DeMoore Retractable inking/coating apparatus having ferris movement between printing units
DE19734100C5 (de) * 1997-08-07 2007-08-09 Koenig & Bauer Aktiengesellschaft Druckturm einer Druckmaschine
US6076463A (en) * 1998-03-13 2000-06-20 Heidelberger Druckmaschinen Ag Ink metering device and method of metering ink

Also Published As

Publication number Publication date
DE10020512A1 (de) 2001-11-15
EP1149700A2 (fr) 2001-10-31
ATE388016T1 (de) 2008-03-15
DE50113678D1 (de) 2008-04-17
EP1149700A3 (fr) 2005-03-16

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