EP0378206B1 - Verfahren und Vorrichtung beim Reinigen von Gummituchzylindern einer Rollenrotationsdruckmaschine - Google Patents

Verfahren und Vorrichtung beim Reinigen von Gummituchzylindern einer Rollenrotationsdruckmaschine Download PDF

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Publication number
EP0378206B1
EP0378206B1 EP90100471A EP90100471A EP0378206B1 EP 0378206 B1 EP0378206 B1 EP 0378206B1 EP 90100471 A EP90100471 A EP 90100471A EP 90100471 A EP90100471 A EP 90100471A EP 0378206 B1 EP0378206 B1 EP 0378206B1
Authority
EP
European Patent Office
Prior art keywords
web
rubber blanket
cleaning
fluid
blanket cylinder
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
EP90100471A
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German (de)
English (en)
French (fr)
Other versions
EP0378206A3 (de
EP0378206A2 (de
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
Priority to AT90100471T priority Critical patent/ATE97612T1/de
Publication of EP0378206A2 publication Critical patent/EP0378206A2/de
Publication of EP0378206A3 publication Critical patent/EP0378206A3/de
Application granted granted Critical
Publication of EP0378206B1 publication Critical patent/EP0378206B1/de
Anticipated expiration legal-status Critical
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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 the method claim and a device for carrying out the method according to the corresponding device claim.
  • the cleaning of rubber printing 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 autotypical halftone printing and also with the full-surface print.
  • the cleaning procedure itself is carried out using a pressure element arranged opposite the cylinder surface, which rubs on the rotating rubber blanket cylinder.
  • the dirt is removed via a cleaning cloth that is in wiping contact with the rubber blanket cylinder and also via the printing substrate itself, the process of which can remain switched on during the cleaning of the rubber blanket.
  • solvent consisting of agents and water, is applied to the blanket surface.
  • DE-U-87 07 384 shows a rotary rotary offset printing machine provided with a washing device.
  • a washing device When washing with a cloth and solvents, additional solvent gets onto the paper web.
  • a dampening solution is applied to the paper web entering the dryer when carrying out a washing process.
  • the US 35 08 711 shows a procedure in which cleaning liquid is distributed from a spray bar arranged in the cylinder-web gap, which passes into the retracting gap of the rubber cylinder and onto the web.
  • a disadvantage of the above-mentioned measures is that when the dirt is loosened, very sticky spots can arise, with the cleaning process causing malfunctions up to the tearing of strips from the web and web break. The web run is very problematic during the cleaning process.
  • the machine standstill also leads to the disadvantage that the ink and dampening solution flow remains interrupted for longer, making it difficult to restart printing with higher waste.
  • the solution is based on the application of a liquid agent to influence the adhesive forces between the web and the rubber blanket during the rubber blanket washing.
  • the web runs wetted with the liquid agent through the cylinder gap of the blanket cylinder being cleaned and has a treatment that counteracts this tendency to stick to the otherwise bare web surface with a greater tendency to stick.
  • the liquid applied accordingly acts as a non-stick agent. It reduces the friction between the web and the cylinder gap and thus also results in fewer web tension fluctuations.
  • the liquid medium is largely set to have no side effects by flashing at the thermal continuous dryer of the printing line and exhaust air purification. Furthermore, there is largely no side effects the washing solutions used for blanket washing. This has the effect that the liquid agent applied to the web is largely absorbed by the paper before larger amounts can split back onto the blanket cylinder in the blanket cylinder gap and then place an unsuitable load on the blanket surface.
  • the equipment for applying the liquid agent is included in the complex of the supply and application devices of the blanket cleaning device, the control parts of both the device for applying the liquid agent and the device for blanket cleaning being linked to one another.
  • the linkage has an apparatus impact due to a compact design.
  • the link is created by the temporal and local connection between the liquid application and the cleaning process.
  • the liquid application can extend from the moment before the start of the blanket cleaning up to a point in time after the end of the blanket cleaning.
  • Fig. 1 are upstream, 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 blanket cylinder 3, has a pressing element 6, over which a cleaning cloth 5 with associated winding and unwinding 7 is guided.
  • a spray pipe 8.1 Seen in the direction of rotation of the blanket cylinder 3 in front of the wash bar 4 is a spray pipe 8.1.
  • a further spray tube 8.2 which, depending on how the unwinding direction of the winding and unwinding 7 runs, applies cleaning liquid to the surface of the rubber blanket and the cleaning cloth 5.
  • the spray tube 8.1 is attached at the level of the winding of the used cleaning cloth 5, the spray tube 8.1 is provided only for wetting the rubber blanket.
  • Cleaning liquid can also be applied to the rubber blanket from the spray tube 8.3, which is arranged on the side of the rubber blanket cylinder 3 opposite the washing bar 4 in the free area between the roller mill of the inking unit and the dampening unit and the web 1.
  • the cleaning liquid consists essentially 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 toward the washing bar 4.
  • 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 not completely absorbed at the next wiping or transfer point will. Thus, small portions of cleaning fluid circulate 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 than the path of the cleaning liquid from the spray tube 8.3.
  • an application tube 9 is arranged at a distance from both, which serves to apply a substance to the web 1.
  • the substance is advantageously a non-sticky liquid.
  • the application 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 application tube 9 is located there next to the spray tube 8.3, but both times the application 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 web liquid covers part of the suction or loading capacity of the web 1, the amounts of the cleaning liquid and the web liquid used must be adjusted among themselves. Furthermore, the properties of the web liquid are to be set so that the cleaning process with respect 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 web liquid is guided to the application tube 9 by means of actuators.
  • the amount pumped can optionally be recorded by measurement for precise dosing.
  • the application of the web liquid can with regard to different areas covering different zones, resulting in zones with different soiling on the blanket cylinder 3 with different zones Adhesive force curve also with zonal distribution.
  • supply lines to the application tube 9 which can be acted upon variably and zone-wise 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 application tube 9 with web fluid results in connection with the timing of the rubber blanket cleaning in accordance with the timing emanating from control circuit 10.1 for the web fluid, the control sequence of the cleaning process and the application of the web fluid being expediently based on the distribution of the application.
  • the application of the web liquid in the web running direction can be adjusted.
  • 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 railway fluid passes control signals to the application tube 9.
  • the controller 10 has inputs for the sensor 15 and for the overrun control device 13.
  • 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 the extent to which, when the web 1 is wetted with a certain amount of web fluid, the dirt is removed properly via the web 1.
  • the run-on control 13 for measuring the run-on 14 supplies a signal variable about the prevailing adhesive forces between web 1 and blanket cylinder 3. A high run-on value is counteracted by increasing the amount of web fluid.
  • the downstream spray tube 8.3 can be used according to FIG. 2 a as application tube 9 for the web 1 running in the printing nip of the next printing unit 2.2 to 2.5.
  • the controller 10 consists of the control circuit 10 ⁇ . 1 for the web fluid, the control part 10 ⁇ .2 for the cleaning device, the press control 10 ⁇ .3 and the control center 10 ⁇ .4 for the press.
  • Manual input parts 11 are provided for the component presetting for engaging the cleaning device and for engaging the application of the web fluid.
  • the supply 12 takes place on boilers with pumps in the case of monitoring devices which are usually set up. Since restarting 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 web fluid can be run until the restart phase.
  • face and reverse printing in the case of multi-lane printing, the web liquid is applied to each side of the web 1 if necessary.
  • the side of the web 1 facing the satellite cylinder has no substantial dirt removal, so that the use of the web fluid is not mandatory.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP90100471A 1989-01-11 1990-01-10 Verfahren und Vorrichtung beim Reinigen von Gummituchzylindern einer Rollenrotationsdruckmaschine Expired - Lifetime EP0378206B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90100471T ATE97612T1 (de) 1989-01-11 1990-01-10 Verfahren und vorrichtung beim reinigen von gummituchzylindern einer rollenrotationsdruckmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3900656A DE3900656C1 (zh) 1989-01-11 1989-01-11
DE3900656 1989-01-11

Publications (3)

Publication Number Publication Date
EP0378206A2 EP0378206A2 (de) 1990-07-18
EP0378206A3 EP0378206A3 (de) 1991-01-30
EP0378206B1 true EP0378206B1 (de) 1993-11-24

Family

ID=6371890

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90100471A Expired - Lifetime EP0378206B1 (de) 1989-01-11 1990-01-10 Verfahren und Vorrichtung beim Reinigen von Gummituchzylindern einer Rollenrotationsdruckmaschine

Country Status (3)

Country Link
EP (1) EP0378206B1 (zh)
AT (1) ATE97612T1 (zh)
DE (2) DE3900656C1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4401275C2 (de) * 1994-01-18 1999-05-12 Roland Man Druckmasch Einrichtung zum Reinigen der Übertragungszylinder
DE4433069C2 (de) * 1994-09-16 1998-09-10 Heidelberger Druckmasch Ag Reinigungsmedium und Verfahren für die Reinigung eines Bogen- beziehungsweise Bahnenführungswegs

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1153570A (fr) * 1955-06-07 1958-03-12 Dispositif et procédé de pulvérisation
US3508711A (en) * 1967-12-29 1970-04-28 Ryco Graphic Mfg Fluid dispensing system
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
DE3723400C1 (de) * 1987-07-15 1989-02-23 Baldwin Gegenheimer Gmbh Verfahren und Vorrichtung zum Reinigen von Zylindern einer Rollendruckmaschine
DE3900657C1 (en) * 1989-01-11 1990-06-13 Rolf 7403 Ammerbuch De Georg Method and apparatus for influencing the web run when cleaning blanket cylinders of a web-fed rotary offset printing machine

Also Published As

Publication number Publication date
DE3900656C1 (zh) 1990-07-26
ATE97612T1 (de) 1993-12-15
EP0378206A3 (de) 1991-01-30
EP0378206A2 (de) 1990-07-18
DE59003561D1 (de) 1994-01-05

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