EP0378180B1 - Procédé et dispositif de nettoyage des cylindres de blanchet d'une presse rotative pour bandes. - Google Patents

Procédé et dispositif de nettoyage des cylindres de blanchet d'une presse rotative pour bandes. Download PDF

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Publication number
EP0378180B1
EP0378180B1 EP90100389A EP90100389A EP0378180B1 EP 0378180 B1 EP0378180 B1 EP 0378180B1 EP 90100389 A EP90100389 A EP 90100389A EP 90100389 A EP90100389 A EP 90100389A EP 0378180 B1 EP0378180 B1 EP 0378180B1
Authority
EP
European Patent Office
Prior art keywords
blanket cylinder
rubber blanket
web
cleaning
pressure
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
EP90100389A
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German (de)
English (en)
Other versions
EP0378180A3 (fr
EP0378180A2 (fr
Inventor
Franz Waizmann
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.)
Baldwin Gegenheimer GmbH
Original Assignee
Baldwin Gegenheimer GmbH
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 Baldwin Gegenheimer GmbH filed Critical Baldwin Gegenheimer GmbH
Publication of EP0378180A2 publication Critical patent/EP0378180A2/fr
Publication of EP0378180A3 publication Critical patent/EP0378180A3/fr
Application granted granted Critical
Publication of EP0378180B1 publication Critical patent/EP0378180B1/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
    • B41F35/00—Cleaning arrangements or devices
    • B41F35/06—Cleaning arrangements or devices for offset cylinders

Definitions

  • the invention relates to a method for cleaning blanket cylinders of a web-fed rotary printing press according to claim 1 and a device for carrying out the method according to claim 7.
  • the cleaning of blanket cylinders of a web-fed rotary printing press serves to remove ink and paper dust residues which, in the case of certain accumulations, interfere with a point-sharp printout in the autotypical halftone print and also with the full-surface print.
  • the cleaning procedure itself is carried out using a pressure element which is arranged opposite the surface of the cylinder and rubs on the rotating blanket cylinder.
  • the dirt removal generally runs over a cleaning cloth that is in wiping contact with the blanket cylinder.
  • solvent consisting of agents and water, is applied to the blanket surface.
  • the US 35 08 711 shows a procedure in which cleaning liquid is distributed from a spray bar arranged in the cylinder web inlet gap, which reaches the rubber cylinder and the web.
  • the task is therefore to intensify the blanket cleaning process with the targeted use of the material flow and the effective times, so that a reduction and saving in waste is achieved.
  • the solution is based on the utilization of the cleaning cycles. With one forward and one back transfer per blanket cylinder rotation, there is a stage with a cleaning circuit. A unit quantity of cleaning fluid is applied per rotation. If there are several application points for the cleaning liquid, the exposure time from the preceding point to the next point to the dirt removal point is longer, which benefits the cleaning efficiency. In addition, a further cleaning cycle is created if a further dirt removal is set up between the preceding and the following point.
  • at least two feed points for the cleaning liquid with at least two retransfer points for the dirt form at least two circuits.
  • a retransmission point consists of an equipped cleaning element, which is a pressed-on cleaning cloth. The further transfer point of dirt from the blanket is between the blanket cylinder and the web.
  • the inventive measure is assigned a further procedural step, which consists in applying a liquid to the web in front of the cylinder going into cleaning, which has a non-stick effect.
  • the dirt leaving the rubber blanket on the web is measured.
  • a measuring sensor is provided after the printing units, which registers the removal of dirt and displays it as desired. In comparison with previous values from previous cleaning cycles, information is obtained from this for the upcoming washing program.
  • a run-on control is provided in the gusset of the cylinder outlet, with which the deflection of the web is sensed when it is glued to the rubber blanket. The amount of deflection may be used to control the cleaning process with regard to the frequency of the pressing element, the amount and distribution of the cleaning liquid over the various supply pipes, the advancement of the cleaning cloth and the control of the non-stick liquid.
  • Fig. 1 are upstream, as seen in the web development direction, arranged in front of the blanket cylinder 3 cleaning devices with washing bars 4 on the blanket cylinder 3 for the face printing and below on the blanket cylinder 3 for the impression.
  • the washing bar 4 which extends over the width of the rubber blanket cylinder 3, has a pressing element 6, over which a cleaning cloth 5 with associated winding and unwinding 7 is guided. Seen in the direction of rotation of the blanket cylinder 3 in front of the wash bar 4 sits a spray tube or a spray device 8.1. After the washing bar 4 there is a further spray tube 8.2 which applies cleaning fluid to the surface of the blanket. When the spray tube 8.1 is attached at the level of the winding-up of the used cleaning cloth 5, the spray tube 8.1 is provided only for wetting the rubber blanket. From the spray tube 8.3, which is arranged on the side of the blanket cylinder 3 facing away from the washing bar 4, in the free area between the roller mill of the inking unit and the dampening unit and the web 1, cleaning liquid can also be applied to the blanket.
  • the cleaning liquid essentially consists of an aqueous phase for the suspension of paper dust adhering to the rubber blanket and of special solvents for removing paint residues.
  • the spray tube 8.1 is arranged for the action of cleaning liquid on the area of the blanket cylinder 3 rotating towards the wash bar.
  • FIG. 2 a which shows the washing bar 4 upstream of the blanket cylinder 3, the effect of the spray tube 8.2 is aimed at the area of the blanket cylinder 3 rotating toward the web 1.
  • the spray tube 8.3 transfers cleaning liquid to the area rotating away from the web 1.
  • the paths of the cleaning liquid over the rubber blanket run according to the arrangement according to FIG. 2 a, essentially from spray tube 8.1 to cleaning cloth 5, from spray tube 8.2 to web 1 and from spray tube 8.3 to the cleaning cloth 5. It goes without saying that each applied parts of cleaning liquid are not completely absorbed at the next wiping or transfer point. So run Small portions of cleaning fluid last longer, and residues of cleaning fluid also reach the web 1 via the wiping contact of the cleaning cloth 5.
  • the spray tube 8.2 is arranged after the wash bar 4 as in the case according to FIG. 2 a, but it is not located in front of the web 1.
  • the path of the cleaning liquid from the spray tube 8.2 to the web is therefore longer as the path of the cleaning liquid from the spray tube 8.3.
  • a spray tube or a spray device 9 is arranged at a distance from both, which serves to apply a substance to the web 1, which is advantageously a liquid which produces a non-stick effect.
  • the spray tube 9 is arranged adjacent to the spray tube 8.2. Due to the arrangement of the washing bar 4 on the back of the blanket cylinder 3 according to FIG. 2 b, however, the spray tube 9 is located there next to the spray tube 8.3, but both times the spray tube 9 is arranged closer to the web 1, so that a targeted effect of the liquid to be applied the web 1 is created. Since the non-stick liquid covers part of the suction or loading capacity of the web 1, the amounts of the cleaning liquid and the non-stick liquid used have to be adjusted among themselves. Furthermore, the properties of the non-stick liquid must be adjusted so that the cleaning process with regard to the loosening of the dirt on the rubber blanket and with regard to the picking up of the dirt by the cleaning cloth 5 and by the web 1 remain largely free of side effects.
  • the non-stick liquid is guided to the spray tube 9 by means of actuators.
  • the amount pumped can optionally be measured for precise dosing.
  • the application of the non-stick liquid can, with regard to the area coverage differing zone by zone, resulting in zone-wise different contamination on the blanket cylinder 3 with zone-wise different zones Adhesive force curve also with zonal distribution.
  • supply lines to the spray tube 9 which can be acted upon variably and in zones are provided. Otherwise, nozzles that do not drip can be opened to different degrees during zone operation in order to achieve zone-wise distribution.
  • the time applied to the spray tube 9 with non-stick liquid results in connection with the timing of the blanket cleaning in accordance with the timing emanating from the control circuit 10.1 for the non-stick liquid, the control sequence of the cleaning process and the application of the non-stick liquid being expediently based on the advance of the application.
  • the application of the non-stick liquid can be adjusted in the direction of web travel. The application extends from before the start of washing to at least the end of washing.
  • the control part 10.2 for the cleaning device comprises the control of the motor for winding and unwinding 7 of the cleaning cloth 5, for the actuation of the pressing element 6 and for the actuation of the actuators for the spray tubes 8.1 to 8.3.
  • a further spray pipe 8.4 for spraying cleaning liquid onto the cleaning cloth 5 can expediently be installed on the side pointing away from the blanket cylinder 3.
  • the control circuit 10.1 for the non-stick liquid passes control signals to the spray tube 9.
  • Inputs for the measuring sensor 15 and for the overrun control device 13 can be connected to the control.
  • the sensor 15 is used for detection the amount of dirt coming off during cleaning.
  • the measuring sensor 15 provides information about the efficiency of the cleaning process designed with a washing program.
  • the cleaning process should be short in duration with little waste.
  • the measuring sensor 15 shows to what extent the dirt 1 is removed properly when the web 1 is wetted with a certain amount of non-stick liquid.
  • the run-on control 13 for measuring the run-on 14 delivers a signal variable about the prevailing adhesive forces between the web 1 and the blanket cylinder 3. A high run-on value is counteracted by increasing the amount of the non-stick liquid.
  • the downstream spray tube 8.3 according to FIG. 2a can be used as a spray tube 9 for the web 1 running in the printing nip of the next printing unit 2.2 to 2.5.
  • the control 10 consists of the control circuit 10.1 for the non-stick liquid, the control part 10.2 for the cleaning device, the printing press control 10.3 and the control station 10.4 for the printing press.
  • Manual input parts 11 are provided for the component presetting for engaging the cleaning device and for engaging in the application of the non-stick liquid.
  • Supply 12 takes place from boilers with pumps in the case of normally set up monitoring bodies. Since the restart of the pressure after cleaning also leads to increased sticking of the web 1 on the rubber blanket before the so-called ink-water balance is established, the non-stick liquid can be run until the restart phase. In the case of straight and reverse printing, in the case of multi-lane printing, the non-stick liquid is applied to each side of the web 1 if necessary. When printing on the satellite cylinder, the side of the web 1 facing the satellite cylinder has no substantial dirt removal, so that the use of the non-stick liquid is not mandatory.

Claims (12)

  1. Procédé de nettoyage du cylindre de blanchet (3) d'une presse rotative à imprimer, dans lequel une toile de nettoyage (5) est déplacée sur un élément presseur et est pressée par ce dernier contre le cylindre de blanchet (3) dans une zone de pression, un fluide de nettoyage étant vaporisé sur le cylindre de blanchet (3) à un endroit opposé à la zone de pression, caractérisé en ce que lors du passage continu et de l'application de la bande (1) à imprimer contre une zone d'application du cylindre de blanchet (3), un agent de nettoyage est simultanément vaporisé respectivement :
    - dans un premier domaine situé, par rapport à la direction de rotation du cylindre de blanchet, entre la zone d'application et la zone de pression, ledit agent de nettoyage étant à nouveau en grande partie enlevé par la toile de nettoyage (5), et
    - dans un second domaine situé entre la zone de pression et la zone d'application, ledit agent de nettoyage étant à nouveau en grande partie enlevé par la bande (1).
  2. Procédé selon la revendication 1, caractérisé en ce qu'un agent de nettoyage est respectivement vaporisé dans le premier domaine, en deux endroits (8.3 ; 8.1) décalés sur la périphérie du cylindre de blanchet (3).
  3. Procédé selon la revendication 1, caractérisé en ce qu'un agent de nettoyage est respectivement vaporisé dans le second domaine, en deux endroits (8.2 ; 8.3) décalés sur la périphérie du cylindre de blanchet (3).
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce qu'un agent de nettoyage est respectivement vaporisé immédiatement devant et derrière la zone de pression.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce qu'un agent antiadhésif (9) est en outre vaporisé sur la face de la bande (1) tournée vers le cylindre de blanchet (3), avant la zone d'application de la bande (1) sur le cylindre de blanchet (3), essentiellement pendant la phase de nettoyage.
  6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce que l'encrassement de la bande (1) est mesuré derrière la zone d'application de la bande (1) sur le cylindre de blanchet (3) et l'encrassement mesuré est utilisé en tant que grandeur de commande pour le procédé de nettoyage.
  7. Dispositif pour la mise en ouvre du procédé selon l'une des revendications 1 à 6, comprenant une barre de lavage (4) ayant un élément presseur (6) pouvant s'appliquer contre le cylindre de blanchet (3) et une installation pour le déplacement d'une toile de nettoyage continue (5) sur l'élément presseur, et comprenant également une installation de vaporisation (8.3) pour un agent de nettoyage, associé à un endroit du cylindre de blanchet (3) opposé à l'élément presseur (6), caractérisé en ce que, hormis le premier endroit de transfert en retour formé par la zone de pression de la toile de nettoyage (5) sur le cylindre de blanchet (3) pour l'agent de nettoyage et la crasse, un second endroit de transfert en retour est formé par la zone d'application de la bande (1) sur le cylindre de blanchet (3), et en ce qu'au moins une installation de vaporisation est associée au premier domaine situé, par rapport à la direction de rotation du cylindre de blanchet (3), entre la zone d'application et la zone de pression, ainsi qu'au second domaine situé entre la zone de pression et la zone d'application du cylindre de blanchet (3).
  8. Dispositif selon la revendication 7, caractérisé en ce que deux installations de vaporisation (8.3 ; 8.1) sont prévues dans le premier domaine, décalés sur la périphérie du cylindre de blanchet (3).
  9. Dispositif selon la revendication 7, caractérisé en ce que deux installations de vaporisation (8.2 ; 8.3) sont prévues dans le second domaine, décalés sur la périphérie du cylindre de blanchet (3).
  10. Dispositif selon l'une des revendications 7 à 9, caractérisé en ce qu'une installation de vaporisation (9) pour un agent antiadhésif est en outre prévue avant la zone d'application de la bande (1) sur le cylindre de blanchet (3) en étant dirigée sur la face de la bande (1) tournée vers le cylindre de blanchet (3).
  11. Dispositif selon la revendication 10, caractérisé en ce que l'installation de vaporisation (9) pour l'agent antiadhésif petit être sélectivement connectée à une source d'agent de nettoyage.
  12. Dispositif selon l'une des revendications 7 à 11, caractérisé en ce que dans la direction de rotation du cylindre de blanchet (3) derrière la zone d'application de la bande (1) sur le cylindre de blanchet (3), il est disposé un capteur de mesure (15) pour déterminer la quantité de crasse déposée sur la bande et une installation de contrôle de poursuite (13, 14) pour la détermination de l'angle d'entraînement généré par l'adhésion de la bande (1) au cylindre de blanchet (3), qui sont chacun reliés à une commande (10) pour les installations de vaporisation (8.1 ; 8.2 ; 8.3 ; 9).
EP90100389A 1989-01-11 1990-01-09 Procédé et dispositif de nettoyage des cylindres de blanchet d'une presse rotative pour bandes. Expired - Lifetime EP0378180B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3900666A DE3900666C1 (fr) 1989-01-11 1989-01-11
DE3900666 1989-01-11

Publications (3)

Publication Number Publication Date
EP0378180A2 EP0378180A2 (fr) 1990-07-18
EP0378180A3 EP0378180A3 (fr) 1991-01-30
EP0378180B1 true EP0378180B1 (fr) 1995-06-07

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ID=6371896

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Application Number Title Priority Date Filing Date
EP90100389A Expired - Lifetime EP0378180B1 (fr) 1989-01-11 1990-01-09 Procédé et dispositif de nettoyage des cylindres de blanchet d'une presse rotative pour bandes.

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EP (1) EP0378180B1 (fr)
AT (1) ATE123444T1 (fr)
DE (2) DE3900666C1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3909119C2 (de) * 1989-03-20 1997-01-23 Heidelberger Druckmasch Ag Wascheinrichtung für eine Druckmaschine
US5259313A (en) * 1991-12-20 1993-11-09 Heidelberg Harris Gmbh Method and apparatus for cleaning an inking mechanism and/or a printing mechanism in printing units of rotary printing machines
DE4401275C2 (de) * 1994-01-18 1999-05-12 Roland Man Druckmasch Einrichtung zum Reinigen der Übertragungszylinder

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3647525A (en) * 1959-10-05 1972-03-07 Dahlgren Mfg Co Method and means for applying liquid to a moving web
US3508711A (en) * 1967-12-29 1970-04-28 Ryco Graphic Mfg Fluid dispensing system
DE1809780A1 (de) * 1968-11-19 1971-06-16 Web Press Eng Inc Verfahren und Vorrichtung zum Reinigen von Gummituchzylindern an Druckmaschinen
US4344361A (en) * 1979-04-19 1982-08-17 Baldwin-Gegenheimer Corporation Automatic blanket cylinder cleaner
DD156239A1 (de) * 1981-01-07 1982-08-11 Eva Luebbe Verfahren zur korrektur von abweichungen der einfaerbung und feuchtung an offsetdruckmaschinen
JPS6072731A (ja) * 1983-09-30 1985-04-24 Dainippon Printing Co Ltd 色間見当プリセツト装置
JPS63188050A (ja) * 1987-01-31 1988-08-03 Dainippon Printing Co Ltd 印刷機ゴム胴の紙粉除去装置
JPH07119114B2 (ja) * 1988-03-31 1995-12-20 凸版印刷株式会社 オフセット印刷校正機用ブランケット洗浄機

Also Published As

Publication number Publication date
ATE123444T1 (de) 1995-06-15
EP0378180A3 (fr) 1991-01-30
DE3900666C1 (fr) 1990-07-26
EP0378180A2 (fr) 1990-07-18
DE59009192D1 (de) 1995-07-13

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