EP2004411B1 - Procede pour nettoyer des plaques d'impression - Google Patents

Procede pour nettoyer des plaques d'impression Download PDF

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Publication number
EP2004411B1
EP2004411B1 EP06829281A EP06829281A EP2004411B1 EP 2004411 B1 EP2004411 B1 EP 2004411B1 EP 06829281 A EP06829281 A EP 06829281A EP 06829281 A EP06829281 A EP 06829281A EP 2004411 B1 EP2004411 B1 EP 2004411B1
Authority
EP
European Patent Office
Prior art keywords
cylinder
ink
printing
impression
print
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.)
Active
Application number
EP06829281A
Other languages
German (de)
English (en)
Other versions
EP2004411A2 (fr
Inventor
Gerhard Augsberg
Ulrich Jung
Jürgen Schölzig
Lothar Simon
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
Priority claimed from DE200610012597 external-priority patent/DE102006012597A1/de
Priority claimed from DE102006026658A external-priority patent/DE102006026658A1/de
Application filed by Manroland AG filed Critical Manroland AG
Publication of EP2004411A2 publication Critical patent/EP2004411A2/fr
Application granted granted Critical
Publication of EP2004411B1 publication Critical patent/EP2004411B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/04—Tripping devices or stop-motions
    • B41F33/10—Tripping devices or stop-motions for starting or stopping operation of damping or inking units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F35/00—Cleaning arrangements or devices
    • B41F35/02—Cleaning arrangements or devices for forme cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2233/00—Arrangements for the operation of printing presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2235/00—Cleaning
    • B41P2235/10—Cleaning characterised by the methods or devices

Definitions

  • the invention relates to a method for operating inking units in printing machines according to the preamble of claim 1.
  • a substrate When printing, a substrate is moved through several printing units, wherein in each printing unit, a partial print image is applied to the substrate.
  • the substrate In the case of color combination printing, the substrate is usually moved through at least four printing units to apply partial printing images in the scale colors black, cyan, magenta and yellow to the substrate.
  • partial print images can be applied in special colors on the substrate.
  • printed images produced in this way can be applied with one or more coatings for the production of protective effects, for the production of structures or for the production of gloss or matt gloss effects.
  • the corresponding printing plates are only conditionally cleaned, as these - albeit in decreasing quantity - continue to be supplied by the inking units. In this case, therefore, only a soiled printing plate is still available for the plate change, in particular because in conventional inking units, for example, offset printing machines, a relatively large amount of ink is stored on a plurality of inking rollers.
  • a method for adjusting color distribution profiles in printing machines is described.
  • two alternatives are proposed in which an initial state for a new printing process is produced by the return transport of the ink when the ink dosing device is closed on the ink fountain roller by the inking roller in the ink reservoir. This can be done by creating a base color layer in the inking unit, which is independent of the later color consumption. Alternatively, an average of a color distribution between an initial and a target state may be generated.
  • printing plates can be cleaned prior to removal via the inking unit or, covered in ink, removed by the plate changer in order to manually clean them outside. This pollute the plate change elements prematurely.
  • the present invention has the object to provide a novel method for operating printing, paint and inking units in printing presses.
  • adjusting and / or stopping at least the inking rollers which cooperate directly with the forme cylinder and thus also the printing plate relative to the forme cylinder and / or the setting and / or stopping of the forme cylinder relative to the counterpressure cylinder can be carried out in such a way that a pressure plate mounted on the forme cylinder terminates the printing process is largely cleaned.
  • the ink supply to the printing plate is interrupted by stopping the inking rollers of the inking unit, so that in Druckan ein only printing ink from the surface of the printing plate or the blanket cylinder on the sheet is printable.
  • the hiring and parking of the inking rollers and the blanket cylinder is carried out so that sheets can be printed in a print position with a formed from Druckfanglesten on the form and the blanket cylinder color image, with no ink from the inking is applied to the printing plate.
  • a color image is printed on a number of printed sheets with a constantly decreasing ink application, that is to say with a reduced ink layer thickness, so that these printed sheets can be produced as waste sheets shortly before the printing off and can be excluded from the production process.
  • An advantage of such a method according to the invention is that the still existing ink layer on the surface of the printing plate by the interaction of form cylinder and blanket cylinder quasi simultaneously can be degraded very quickly by dissipation on the printing blanket printed substrate. After only a few turns of the two cylinders, the color layer is reduced to a very small layer thickness by the respective half-split of the remaining color layer.
  • the inking and dampening rollers are turned off at the time of a preselectable number of sheets before final printing off the plate cylinder when the blanket cylinder.
  • the number of sheets is displayed in a machine menu at their controller, e.g. given to a control room.
  • the input to the control station which determines this number may e.g. take place in a value range from 0 to 100. In practical use, up to 65 Abfärbebogen be used. If the production is terminated by an expired pad counter of the printing machine control or by a control button on the control station, inking and dampening rollers are automatically turned off earlier, while still being printed and the corresponding number of signatures is transported through the printing press.
  • a simultaneous shutdown of inking and dampening rollers is provided according to the invention, since when turning off the inking rollers alone, a lower color decrease and thus a poorer cleaning effect was found.
  • the delayed or separate shutdown of the dampening rollers can still be useful as a procedure for special subjects, substrates or printing inks.
  • the method according to the invention is improved in that, on a printing press which has one or more coating units for additional coating of the printed sheets, the shutdown of the coating units takes place at least offset for stopping the inking or dampening rollers in the course of the inking. It is provided that a paint removal can be provided, with a residual amount of paint can be removed from the coating plants. According to the invention, however, this should only take place when the amount of ink remaining on the plate cylinder and the blanket cylinder is minimized, so that in the or the coating units a splitting of ink from the sheet to coating forms or blankets in the coating is reliably avoided.
  • a printing machine has a sheet feeder and in the area of printing units each have at least one inking unit and the printing units downstream of a sheet delivery. Usually, several printing units are connected in succession. Printing sheets to be printed are moved over several sheet guiding cylinders through the printing machine, with some sheet guiding cylinders being designed as transfer cylinders and others as impression cylinders. In the area of the inking units, a transfer cylinder or blanket cylinder rolls on the impression cylinder. In turn, a printing cylinder or plate cylinder carrying at least one printing plate interacts with the blanket cylinder. About an inking unit with inking rollers and optionally a dampening unit with dampening rollers printing ink and optionally previously dampening solution is applied to the or each positioned on the plate cylinder printing plate.
  • the inking rollers and dampening rollers are this against the plate cylinder in a pressure plate contacting position and the pressure plates not touching position on and off.
  • the ink is then applied as a partial print image on the blanket cylinder on the printed sheet held on the impression cylinder.
  • the printed in this way in the printing units with a printed image and optionally in a coating unit with a further coating in the form of a colored or clear surface layer refined sheet are discharged via a conveyor system from the printing press and stored to form a delivery stack in the sheet delivery.
  • the plate cylinders each have at least one chucking channel in which chucks for the or each pressure plate are integrated, which is to be positioned on the plate cylinder.
  • the plate cylinders are preferably each assigned a plate changing machine, by means of which the automatic supply and discharge of fresh or used printing plates to or from the plate cylinder is made possible.
  • the starting and stopping of the inking rollers now takes place such that the stopping of the plate cylinder always before the completion of sheet travel or transport of sheet during a print job, the setting of plate cylinder, blanket cylinder and impression cylinder in their touch maintained each other.
  • the then largely clean pressure plate can then be removed without risk for the automatic plate changing and a new printing plate can be supplied.
  • the starting and stopping of inking rollers and the plate cylinder in the manner described is carried out via the actuators and which are controlled by a control device with respect to the working position of the printing press.
  • the actuation of the actuators and takes place in real time control by the machine control of the printing press.
  • corresponding lead times or lead angles are provided to achieve a timely response of the actuators.
  • the actuators and are preferably as pneumatic or hydraulic cylinder-valve units executed. However, they may also be in the form of electric actuators or cam controls.
  • the inking rollers are preferably first off the plate cylinder and then the blanket cylinder from the impression cylinder and the plate cylinder off.
  • a number of printed sheets can be fixed by means of the control device, which, after conversion of the printing unit or the inking rollers into the print-off position, are each still printed with an incomplete color image by means of the printing ink remaining on the blanket cylinder and the printing plate.
  • the number of these printed sheets can be entered at a control station and determined such that after taking the print-off position each positioned on the plate cylinder printing plate has a defined ink residue layer thickness.
  • inking incomplete color images are printed on the respective printed sheets with a reduced inking, so with a conditionally reduced by the ink supply to the printing plate and the blanket cylinder ink supply decreasing ink layer thickness. In this way, the surfaces of printing blanket cylinder and printing plate are largely cleaned. In addition, the risk of drying larger amounts of ink on the blanket cylinder or the printing plate can be avoided.
  • a so-called flying plate change is provided, in which with the help of individual drives and the exchange of printing plates on individual selected plate cylinders is possible.
  • the other printing plates remain on the corresponding plate cylinders, so that only a partial image of the entire print image is exchanged.
  • Such a procedure may be useful if sub-picture content, eg explanations in constantly changing languages in an otherwise static color image are imprinted.
  • the running during the flying plate change plate changing process in this case corresponds to a conventional plate change.
  • the flying plate change can be used for the exchange of a specific printing plate with the direct further use of the same printing unit with the new printing plate for subsequent printing.
  • the inventive method of staining the blanket cylinder or the printing plate on expiring sheet or wastepaper sheet after completion of a print job makes sense.
  • the method is then performed only in the special printing unit, which is taken to the plate change from the printing process.
  • the blanket cylinder does not have to be washed or cleaned by means of a corresponding washing device, and the special printing plate does not have to be cleaned separately for use in a plate changing machine.
  • the inking rollers are turned off before. The remaining on the blanket and the plate cylinder excess ink is then removed during braking of the printing machine before the flying plate change without the input of additional waste sheet from the selected printing unit. But there when braking the printing press Normally waste material is created, this can be used directly for the coloration.
  • the inking and dampening rollers are turned off at the time of a preselectable number of sheets before final printing off the plate cylinder when the blanket cylinder.
  • the number of sheets is displayed in a machine menu at their controller, e.g. given to a control room.
  • the input to the control station which determines this number may e.g. take place in a value range from 0 to 100. In practical use, up to 65 Abfärbebogen be used. If the production is terminated by an expired pad counter of the printing machine control or by a control button on the control station, inking and dampening rollers are automatically turned off earlier, while still being printed and the corresponding number of signatures is transported through the printing press.
  • the delayed or separate shutdown of the dampening rollers can still be useful as a procedure for special subjects, substrates or printing inks.
  • the prolonged humidification of the printing plate may be advantageous if it is still desired a cleaning effect on the printing plate against contamination of a kind other than printing ink. This is conceivable for subjects with low coverage or for dusty substrates.
  • certain Printing inks tend to re-splitting, which can be avoided by prolonged moistening of the printing plate.
  • the method of staining will be adjusted when it is carried out on a printing press that is in contact with one or more coating units, e.g. for gloss coating the sheet is equipped. Then, the method of staining may be carried out alone or combined with a method of lacquering.
  • the shutdown of the coating is at least offset to the shutdown of the inking or dampening rollers. This ensures that the waste sheets are still sufficiently covered with paint or coating medium during Abfärbens. It is thus avoided that moist printing ink present on the waste paper sheet can split back onto a coating plate mounted on a paint form cylinder of the coating unit or a correspondingly attached printing blanket and can dirty it in an undesired manner.
  • a paint application roller can be parked by the paint-forming cylinder and / or the paint-forming cylinder from the impression cylinder in a coating unit. With this procedure, a much faster reaction is achieved than if only the paint supply would be turned off in the coating. Thus, a splitting of ink on elements of the coating is quickly and safely avoided and at the same time allows a precisely controllable removal of the residual paint from the elements of the coating.
  • a so-called paint removal can also be provided.
  • a residual quantity of paint or a residual amount of coating medium can be removed from the coating units.
  • this should only take place when the amount of ink remaining on the plate cylinder and the blanket cylinder has been minimized. Therefore, here run a predetermined number of sheets for removing ink when parked Color and optionally dampening rollers in employed on the plate and the impression cylinder blanket cylinder by the printing press, while the or the coating units are still in operation and a splitting of ink from the sheet to coating forms or blankets in the coating is reliably avoided. Only then is a possibly predetermined number of further printed sheets for the removal of the remaining coating or residual coating medium in the coating plants promoted by the printing press and the coating plants.
  • a number of sheets can be fixed, the same between a Druckab ein the inking unit and a Druckan ein or between two Druckan thoroughlyen pushed with interposed Druckabritt the inking unit without any color.
  • These incompletely colored printed sheets can be used for measuring purposes, for example. The ejection of the incomplete printed sheets can be done automatically via a curved divider or a double jib.

Claims (7)

  1. Procédé d'utilisation d'une ou plusieurs unités d'encrage d'une machine d'impression, comportant respectivement un système d'acheminement d'encre comprenant au moins un rouleau applicateur d'encre et un cylindre porte-cliché supportant au moins un cliché d'impression, le rouleau applicateur d'encre transférant de l'encre d'impression sur le ou chaque cliché d'impression positionné sur le cylindre porte-cliché, étant associée au cylindre porte-cliché une unité d'humidification contenant des cylindres mouilleurs,
    l'encre d'impression pouvant être transférée directement ou via un cylindre porte-blanchet d'impression du cliché d'impression respectif sur des feuilles d'impression passant entre le cylindre porte-cliché et un cylindre de contre-pression et
    le rouleau applicateur d'encre étant réglable par rapport au cylindre porte-cliché, des feuilles d'impression pouvant être imprimées d'une image colorée lors d'une approche d'impression pour un nombre de feuilles sélectionnable, alors qu'il se produit une interruption de l'acheminement d'encre par les systèmes d'acheminement d'encre,
    caractérisé en ce
    qu'un écartement des rouleaux applicateurs d'encre et/ou des rouleaux mouilleurs du cylindre porte-cliché et l'écartement du cylindre porte-blanchet d'impression par rapport au cylindre de contre-pression sont effectués et
    que les feuilles d'impression, dans une approche d'impression du cylindre porte-cliché ou du cylindre porte-blanchet d'impression, sont imprimées au moyen des rouleaux applicateurs d'encre avec une quantité résiduelle d'encre d'impression restant sur le cylindre porte-blanchet d'impression et le cliché d'impression pour un nombre de feuilles sélectionnable, les rouleaux applicateurs d'encre étant écartés et sans acheminement d'encre.
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    l'écartement du rouleau applicateur d'encre et/ou des rouleaux mouilleurs du cylindre porte-cliché ou porte-cliché de vernissage et l'écartement du cylindre porte-blanchet d'impression ou du cylindre porte-cliché de vernissage du cylindre de contre-pression est effectué et que les feuilles d'impression peuvent être imprimées d'une image colorée dans une approche d'impression pour un nombre de feuilles sélectionnable au moyen des rouleaux applicateurs d'encre sans acheminement d'encre, une application de vernis étant réalisée en plus.
  3. Procédé selon la revendication 1,
    caractérisé en ce que
    les rouleaux applicateurs d'encre et/ou les rouleaux mouilleurs sont écartés du cylindre porte-cliché en cas d'approche d'impression entre le cylindre porte-cliché et le cylindre de contre-pression et que,
    le cylindre porte-blanchet d'impression est ensuite écarté du cylindre porte-cliché et du cylindre de contre-pression ou d'abord du cylindre porte-cliché puis du cylindre de contre-pression.
  4. Procédé selon les revendications 1 à 3,
    caractérisé en ce que
    les rouleaux applicateurs d'encre et/ou les rouleaux mouilleurs sont écartés du cylindre porte-cliché en cas d'approche d'impression entre le cylindre porte-cliché et le cylindre porte-blanchet d'impression et le cylindre de contre-pression et que
    le cylindre porte-blanchet d'impression est ensuite écarté du cylindre porte-cliché et du cylindre de contre-pression ou d'abord du cylindre porte-cliché puis du cylindre de contre-pression et
    que le cylindre porte-cliché de vernissage est ensuite écarté de son cylindre de contre-pression.
  5. Procédé selon les revendications 1 à 4,
    caractérisé en ce que,
    au moyen d'un dispositif de commande qui est prévu pour définir un certain nombre de feuilles d'impression à imprimer avant l'intervention de l'écartement à l'impression avec une image d'impression résiduelle avant l'écartement de l'impression ou de feuilles d'impression passant dans l'unité d'impression
    sans aucun acheminement d'encre et avec une application d'encre diminuant constamment,
    le nombre de feuilles d'impression encore en transit peut être défini de manière à ce que,
    après intervention de l'écartement à l'impression, le ou chaque cliché d'impression positionné sur le cylindre porte-cliché présente une épaisseur de couche d'encre résiduelle définie de préférence minimale et tendant de préférence vers zéro.
  6. Procédé selon les revendications 1 à 5,
    caractérisé en ce que,
    au moyen du dispositif de commande, une vitesse de production est automatiquement réduite avant un écartement à l'impression et/ou pendant un écartement à l'impression.
  7. Procédé selon les revendications 5 ou 6,
    caractérisé en ce
    qu'il est défini un certain nombre de feuilles d'impression qui passent entre deux approches d'impression et un écartement à l'impression interposé dans l'unité d'impression sans aucun acheminement d'encre par l'unité d'encrage.
EP06829281A 2005-12-27 2006-12-05 Procede pour nettoyer des plaques d'impression Active EP2004411B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102005063309 2005-12-27
DE200610012597 DE102006012597A1 (de) 2006-03-18 2006-03-18 Verfahren zur Reinigung von Druckplatten
DE102006026658A DE102006026658A1 (de) 2005-12-27 2006-06-08 Vorauslaufende Walzenabstellung bei Druckformwechsel
PCT/EP2006/011634 WO2007073834A2 (fr) 2005-12-27 2006-12-05 Procede pour nettoyer des plaques d'impression

Publications (2)

Publication Number Publication Date
EP2004411A2 EP2004411A2 (fr) 2008-12-24
EP2004411B1 true EP2004411B1 (fr) 2012-02-01

Family

ID=37781946

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06829281A Active EP2004411B1 (fr) 2005-12-27 2006-12-05 Procede pour nettoyer des plaques d'impression

Country Status (5)

Country Link
US (1) US20090095179A1 (fr)
EP (1) EP2004411B1 (fr)
CN (1) CN101389479B (fr)
AT (1) ATE543651T1 (fr)
WO (1) WO2007073834A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008029998A1 (de) * 2007-07-11 2009-01-15 Manroland Ag Abfördern von Druckfarbe
DE102014007852A1 (de) * 2014-05-22 2015-11-26 Heidelberger Druckmaschinen Ag Verfahren zum Betreiben einer Druckmaschine
CN113811355A (zh) 2019-03-08 2021-12-17 美国迈胜医疗系统有限公司 穿过柱体输送辐射并为其产生治疗计划

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2081181A (en) * 1980-07-15 1982-02-17 Unilever Plc Cleaning offset printing blankets
DE3312128C2 (de) * 1983-04-02 1986-04-03 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Vorrichtung an Druckmaschinen mit einer Einrichtung zum Lackieren von Druckbögen
DE3707695A1 (de) 1987-03-11 1988-09-22 Heidelberger Druckmasch Ag Verfahren zur definierten erzeugung einer dem fortdruck nahen farbverteilung im farbwerk von rotationsdruckmaschinen
US5174210A (en) * 1990-04-27 1992-12-29 Heidelberger Druckmaschinen Aktiengesellschaft Preparation of the inking unit of a printing press for a change of printing job
DE4312229C2 (de) * 1993-04-14 1999-10-28 Heidelberger Druckmasch Ag Verfahren zur definierten Erzeugung einer dem Fortdruck nahen Farbverteilung im Farbwerk von Rotationsdruckmaschinen
DE19708435C2 (de) * 1997-03-01 2001-05-10 Heidelberger Druckmasch Ag Verfahren zur Reinigung eines Farbwerks einer Druckmaschine
JP2000071424A (ja) * 1998-09-02 2000-03-07 Komori Corp 多色印刷機におけるインキ膜厚制御方法
DE60141261D1 (de) * 2000-05-17 2010-03-25 Komori Printing Mach Verfahren zum Entfernen von Druckfarbe für eine Druckpresse
DE10360011A1 (de) * 2003-12-19 2005-07-21 Man Roland Druckmaschinen Ag Vorrichtung zum Reinigen von Walzen, Zylindern und Druckformen

Also Published As

Publication number Publication date
EP2004411A2 (fr) 2008-12-24
CN101389479A (zh) 2009-03-18
WO2007073834A3 (fr) 2007-08-23
ATE543651T1 (de) 2012-02-15
WO2007073834A2 (fr) 2007-07-05
US20090095179A1 (en) 2009-04-16
CN101389479B (zh) 2012-08-08

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