EP0654350A1 - Procédé pour le nettoyage automatique de cyclindres dans des machines d'impression à commande centrale - Google Patents

Procédé pour le nettoyage automatique de cyclindres dans des machines d'impression à commande centrale Download PDF

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Publication number
EP0654350A1
EP0654350A1 EP94117747A EP94117747A EP0654350A1 EP 0654350 A1 EP0654350 A1 EP 0654350A1 EP 94117747 A EP94117747 A EP 94117747A EP 94117747 A EP94117747 A EP 94117747A EP 0654350 A1 EP0654350 A1 EP 0654350A1
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EP
European Patent Office
Prior art keywords
printing
washing
cylinder
account
web
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.)
Granted
Application number
EP94117747A
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German (de)
English (en)
Other versions
EP0654350B1 (fr
Inventor
Rune G. Dipl.-Ing. Vestman
Kjell E. Dipl.-Ing. Lundin
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.)
Oxy Dry Maschinen GmbH
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Oxy Dry Maschinen GmbH
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Publication date
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Application filed by Oxy Dry Maschinen GmbH filed Critical Oxy Dry Maschinen GmbH
Publication of EP0654350A1 publication Critical patent/EP0654350A1/fr
Application granted granted Critical
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F35/00—Cleaning arrangements or devices

Definitions

  • the invention relates to a method for fully automatic cylinder cleaning in printing presses with a central control system.
  • Printing machines are used in particular for newspaper web presses, commercial web presses and sheetfed presses for all printing processes, such as offset printing, anilox offset, intaglio printing, flexographic printing, anilox flexo, letterpress printing and gravure printing.
  • the cylinders to be cleaned are understood to mean all rollers, rollers and cylinders, in particular blanket cylinders, impression cylinders, plate and form cylinders, cooling rollers, guide rollers, inking rollers and dampening rollers.
  • the machines in question have in common that intensive contact between the printing material and the cylinder is necessary for guiding, processing and driving printing material sheets or printing material webs. This creates deposits of paper dust, printing ink and possibly powder dust on the cylinders. These deposits affect the functionality of the cylinders; For example, deposits on blanket cylinders have a negative impact on offset printing: the dot sharpness is lost and some print sections no longer print correctly. In the case of blanket cylinders in particular, however, the deposition rate is particularly high owing to the high viscosity and adhesiveness of the printing ink. For print quality and operational safety, it is therefore essential that the cylinders mentioned are regularly freed of contaminants.
  • the printing process is usually interrupted and the cylinders are washed by hand. Not only does this take a lot of time - the washing process, and thus the pressure interruption, takes around 15 minutes - the washing worker must also be very careful so that no fibers from the cleaning rag remain on the surface, especially the blanket cylinder; because they cause misprints.
  • Such hand washing also endangers the health of the washing worker: contact with solvents dissolves the natural protective coating of the skin, inhaling high concentrations of solvent vapors at least affects the general well-being.
  • the automated washing device described here essentially consists of a brush roller which can be moved up to the cylinder to be cleaned, nozzle tubes for spraying the brush roller with washing liquids, feeds for the washing liquids and a control of the individual functions. If there are several washing devices in a printing press, they can be controlled by a central control unit, which enables remote control of the washing devices from a central point.
  • wash sequence programs are not variable. For example, for the individual washing devices, the duration of the cleaning process, the quantity metering of the washing liquids and, above all, the time course of the washing liquid metering, as well as the mechanical sequence of the cleaning process for the cleaning conditions to be expected as a rule, are preset.
  • the invention is based on the object of specifying a method for fully automatic cylinder cleaning in printing presses with a central control system, by means of which automated washing devices on each cylinder to be cleaned can achieve optimum cleanliness with minimal amounts of washing liquid in the shortest possible time with minimal effort , whereby a web break in a possibly existing printing material web is reliably avoided.
  • This task is solved by a control system extension with which the operating parameters for determining the optimal wash sequence programs for each individual washing device are recorded by accessing the central printing machine control system, the optimal washing sequence programs for each individual washing device are automatically determined and the individual washing devices with the corresponding one optimal wash program can be controlled.
  • the method according to the invention is considerably faster, safer and cheaper.
  • a washing process central computer is used as an extension of the central printing press control system.
  • This central computer can optionally communicate with the various levels of the printing press control system and thus access the data necessary to determine the optimal wash cycle programs. The determination of the optimal washing sequence programs and the control of the individual washing device is then carried out from this central computer.
  • the determination of the optimal wash sequence program can be carried out by choosing the best approximation from a number of permanently preset sets of wash sequence programs, but it is also preferably possible for the wash sequence programs to be calculated individually or in groups by means of an algorithm from the recorded operating parameters be determined.
  • the speed of rotation during the washing process has a significant influence on the parameters to be selected for the optimal washing program, so it is advantageous that this speed of rotation is taken into account when determining the washing program.
  • the printing volume of the printing machine which was at the time of the start of the washing process, is also responsible for the degree of soiling of the cylinder to be cleaned and can expediently be taken into account when determining the optimal washing sequence program.
  • the presence of a substrate-cylinder contact during the cleaning process is taken into account as an operating parameter when determining the optimal wash sequence program; it can be an advantage that the fact whether the beautiful side or the opposite side of a paper web touches the cylinder is also taken into account: the surface properties of the paper web are of course essential for the contamination rate of the cylinder to be cleaned.
  • both operating parameters have a significant influence on the pollution rate and the degree of difficulty in removing the pollution;
  • the paper type think for example of the dustiness and pick resistance, the compatibility with washing liquid and especially the water compatibility of the paper; in the case of the color type, for example, in terms of speed and washability.
  • the cylinder position in the printing sequence can also be taken into account as an operating parameter when determining the wash sequence program. This is advantageous, for example, in the case of paper as a printing material, since experience has shown that the largest amount of paper fibers is plucked off when the first paper-cylinder contact is made, which then attach to the cylinder. However, the fact whether printed or unprinted printing material comes into contact with the cylinder is also significant for the type and amount of contamination.
  • the direction of rotation of the cylinder during the washing process is preferably also taken into account as an operating parameter when determining the optimal washing sequence program. Since the automated washing devices generally do not work symmetrically with respect to the direction of rotation of the cylinder to be cleaned, the direction of rotation of the cylinder during the washing process has an influence on the washing result. It is therefore advantageous to take this operating parameter into account in the wash cycle program.
  • the wrap angle of the printing material web around the cylinder to be cleaned is taken into account as an operating parameter for determining the optimal wash sequence program during washing:
  • the wrap angle of the printing material web has a great influence on the amount of liquid that flows from the web from the cylinder to be cleaned is lifted off and discharged. This in turn is decisive for the risk of a web break.
  • the web with the cleaning liquid also takes part of the cylinder contamination, which has a positive effect on the washing result.
  • both effects have an effect on the amount of liquid that remains on the cylinder and thus possibly indirectly on the amount of waste when printing on.
  • the substrate web wrap angle of the individual cylinders is determined by the web guide path and the cylinder position in the printing unit, so that the operating parameter "wrap angle" can be determined by accessing the data on the web guide path and on the machine position.
  • the amount of dampening water is preferably also recorded and taken into account as an operating parameter for determining the wash sequence programs.
  • the amount of dampening water used significantly influences the build-up of the deposits on the cylinders.
  • each washing process is started automatically at precisely this or the next possible time: It is even possible to clean each individual cylinder to be cleaned at individual washing intervals, or at The next opportunity to clean all cylinders or individual cylinder groups. It may also be correct to clean one or more cylinders "too early"; the right time for cleaning is determined in any case taking into account all relevant operating parameters, which do not have to be exhausted in determining the degree of soiling, but which can also include production breaks, for example, which are due to the production process.
  • the determined wash sequence programs can expediently be checked and corrected manually by the printing press control system, for example from a central control center.
  • the method according to the invention detects the operating parameters in order to determine the optimal washing sequence programs for each individual washing device, that is to say at a point at which all process parameter data, be it as a specification or as a feedback from the machines, are already available in an ordered manner.
  • a washing program is then determined, with which the automated washing device is controlled and which moistens the printing material web with cleaning liquid, taking into account the current cleaning requirements of the guide rollers, which are also determined by access to the central printing machine control system.
  • the thus moistened printing material web runs from the blanket cylinder, to which the selected automated washing device is assigned, to the guide rollers to be cleaned.
  • the guide rollers to be cleaned are controlled, braked or driven according to the invention either manually or automatically from the central control station during their contact with the moistened printing substrate web in order to produce a slip between the guide roller and the printing substrate web. If the slip process is automated, the time and the duration of the slip courses of the individual guide rolls to be cleaned are automatically determined and used by accessing the data available in the central control system in order to optimize the overall process (washing of all guide rolls).
  • the desired cleaning effect for the guide rollers to be cleaned results from the slippage and the fact that the printing material web has been moistened with cleaning liquid in a defined manner. At least some of the guide rollers can be cleaned fully automatically within the scope of the method according to the invention without additional effort and without having to assign an automated washing device or for each printing substrate web a detergent application device or, if necessary, with one side for each printing substrate web.
  • the detergent application device can be arranged both before and after the blanket washing device.
  • FIG. 1 shows a satellite unit 1 of a newspaper web offset press in which two paper webs 5a and 5b are each printed in 1 + 1 printing.
  • the satellite unit 1 is in the print-down position. It essentially consists of an impression cylinder 2, four blanket cylinders 3 and four printing plate cylinders 4. In the example shown, the paper webs 5a, 5b are printed in print-on position without contacting the impression cylinder 2 between two blanket cylinders 3 in each case. The blanket cylinders 3 are now cleaned in the print-down position by the washing devices 9 assigned to each blanket cylinder 3.
  • the washing devices 9 each have different operating parameters, as a result of which the washing sequence programs of the washing devices 9 differ from one another for an optimal result
  • Two of the four blanket cylinders 3 have paper contact during the cleaning process - there may be a risk of a web break there - and thus there are completely different cleaning conditions than with the other two blanket cylinders 3.
  • the operating parameters that are important here are, for example: paper web -Cylinder contact, wrap angle, rubber-rubber pressure instead of rubber-steel pressure, circumferential speed of the blanket cylinder 3, as well as the amount of ink and fountain solution.
  • the operating parameters type and quality of the paper web and the color, as well as the fact whether the blanket cylinder cleaning takes place during or after the production also to be considered.
  • the method according to the invention therefore makes it possible to optimally create the individual washing sequence programs for the individual washing devices 9, as a result of which the individual washing devices 9 with individually adapted washing parameters, such as: Detergent amount, amount of water, intensity and total duration of the mechanical cleaning process, but above all with the individually adapted time course of these washing parameters can be optimally controlled.
  • individually adapted washing parameters such as: Detergent amount, amount of water, intensity and total duration of the mechanical cleaning process, but above all with the individually adapted time course of these washing parameters can be optimally controlled.
  • FIG. 2 shows the same satellite unit of a newspaper web offset machine with a different web guide.
  • the paper web 5 is printed here in 4 + 0 printing. Again, it is clear that two of the four blanket cylinders 3 are in contact with paper during the cleaning process, but the remaining two blanket cylinders 3 are not. In this example, the paper web 5 is printed between the impression cylinder 2 and the four blanket cylinders 3 in the print-on position; so it is printed between rubber and steel.
  • the printing plate cylinders 4 and the washing devices 9 have the same function here as in the satellite unit 1 of FIG. 1.
  • the same operating parameters for determining the optimal washing sequence programs are also interesting here, but it is clear that the operating parameters and therefore also the optimal washing sequence programs for the washing devices 9 here are very different from the operating parameters in the example in FIG. 1.
  • FIG. 3 shows two web guiding options in a commercial web press: In the upper illustration, a paper web 5 is printed in 5 + 5 printing and is guided in a straight line through the printing units 10, 11, 12, 13 and 14. These printing units each consist essentially of two blanket cylinders 3 and two printing plate cylinders 4, with the blanket cylinders 3 each being assigned a washing device 9. The lower representation in FIG. 3 shows that two paper webs 5a and 5b can optionally be used.
  • the paper web 5a is given a 1 + 1 print in the printing unit 15, and the paper web 5b is given a 4 + 4 print in the printing units 16, 17, 18 and 19.
  • the most interesting operating parameter in FIG. 3 is the order of the printing unit assignment: printing unit 10 is the first to come into contact with paper web 5, as a result of which an above-average amount of paper fibers are plucked from fresh paper web 5.
  • the printing unit 11, which is in second place comes into contact with freshly printed paper.
  • the situation is different with the printing units 15 and 16, which are each at the first printing point.
  • the wash sequence programs of the washing devices 9 in the printing units 11 and 16 must therefore be different.
  • it is also customary to work with changing paper types and ink types which means that the paper quality and the ink quality are primarily important operating parameters for determining the optimal wash sequence programs.
  • FIG. 4 shows two snapshots of the relevant parts of a sheet-fed printing machine 20:
  • the upper picture shows schematically how sheets of paper 21 are printed in 5 + 0 printing.
  • the sheets of paper 21 pass through one Sheet feeder 22 on the impression cylinder 2, are each printed by the blanket cylinder 3, which is connected to the printing plate cylinder 4, transported via the transport cylinder 23 to the next impression cylinder 2, until finally the printed paper sheet 21 is finally placed in a sheet delivery 24.
  • the paper sheets 21 are given a 4 + 1 print: after the first impression cylinder 2, the paper sheets 21 pass through a transport cylinder 23 and a sheet reversing drum 25, as a result of which the previous back side of the paper sheet 21 is subsequently printed.
  • the sequence of the printing units in the printing process is essential for the wash sequence programs of the washing devices 9. moreover, it is particularly easy, especially in sheet-fed machines, to change the paper quality at very short intervals, which likewise has a considerable influence on the optimal washing sequence programs of the washing devices 9.
  • other operating parameters such as cylinder speeds, production quantities, fountain solution quantities, speed and quantity of ink are also important for the creation of the optimal wash sequence programs.
  • FIG. 5 illustrates the web guidance of a newspaper roll printing machine from the last satellite unit 1 to the guide rollers 26, which transport the finished printed paper web 5 for further processing.
  • the guide rollers 26 are not with automated washing devices in this example 9 equipped; the printing material web has also not been provided with an additional automated detergent application device. Due to the intimate contact with the printed paper web 5, however, it is necessary from time to time to clean the guide rollers 26 as well, depending on the operating parameters such as the print run, type of printing ink, type of paper web etc.
  • the control system extension recognizes that the blanket cylinder 3 'is the last cylinder with an associated washing device 9' and controls the washing device 9 'with a corresponding washing sequence program in order to clean the guide rollers 26: by the washing device 9' the blanket cylinder 3 'and thus indirectly the paper web 5 is moistened with cleaning agent which carries the cleaning agent to the guide rollers 26.
  • the guide rollers 26, which are to be cleaned, are braked as they pass through the paper web 5 in order to produce a slip.
  • the wiping effect of this slip between the guide roller 26 on the one hand and the paper web 5 moistened with cleaning agent on the other hand cleans the guide roller 26 with good success.
  • the best wash sequence program for an optimal washing result is selected or determined fully automatically by accessing the data of the relevant operating parameters present in the central control system of the printing press.
  • the embodiment according to the invention shown in FIG. 5 thus represents a simple and inexpensive, but nevertheless effective variant of the method according to the invention If required, detergent can be applied to both sides of the substrate without additional effort.
  • the method according to the invention thus makes it possible to achieve cylinder cleaning in printing presses which produces optimum cleanliness in the shortest possible time without the risk of a web break in machines with webs. Even cleaning while the machine is in operation is possible.

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  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
EP94117747A 1993-11-12 1994-11-10 Procédé pour le nettoyage automatique de cyclindres dans des machines d'impression à commande centrale Expired - Lifetime EP0654350B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4338625A DE4338625A1 (de) 1993-11-12 1993-11-12 Verfahren zur vollautomatischen Zylinderreinigung bei Druckmaschinen mit zentralem Leitsystem
DE4338625 1993-11-12

Publications (2)

Publication Number Publication Date
EP0654350A1 true EP0654350A1 (fr) 1995-05-24
EP0654350B1 EP0654350B1 (fr) 1997-04-09

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ID=6502419

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EP94117747A Expired - Lifetime EP0654350B1 (fr) 1993-11-12 1994-11-10 Procédé pour le nettoyage automatique de cyclindres dans des machines d'impression à commande centrale

Country Status (12)

Country Link
US (1) US6109182A (fr)
EP (1) EP0654350B1 (fr)
JP (1) JP2918090B2 (fr)
KR (1) KR100288991B1 (fr)
AT (1) ATE151350T1 (fr)
AU (1) AU677716B2 (fr)
CA (1) CA2135722A1 (fr)
DE (2) DE4338625A1 (fr)
DK (1) DK0654350T3 (fr)
ES (1) ES2103531T3 (fr)
FI (1) FI106443B (fr)
GR (1) GR3024070T3 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0715956A3 (fr) * 1994-12-06 1996-11-27 Roland Man Druckmasch Méthode et dispositif de nettoyage d'un cylindre d'une machine à imprimer rotative
EP0755787A2 (fr) 1995-07-26 1997-01-29 Grafotec Gmbh Dispositif pour nettoyer des surfaces de travail d'une machine d'imprimerie, notamment installation de lavage de blanchet
EP1661702A1 (fr) 2004-11-30 2006-05-31 Oxy-Dry Maschinen GmbH Méthode et appareil pour le nettoyage de cylindres dans une machine d'impression
DE102007043857A1 (de) * 2007-09-14 2009-03-19 Manroland Ag Verfahren zum Betreiben einer Rollendruckmaschine
US8887635B2 (en) 2011-05-02 2014-11-18 Heidelberger Druckmaschinen Ag Method for cleaning inking units in offset printing presses
DE102018211601A1 (de) * 2018-07-12 2020-01-16 Heidelberger Druckmaschinen Ag Verfahren zum Reinigen der Oberfläche wenigstens einer rotierbaren Komponente einer Druckmaschine von einem Druckfluid

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DE19501694A1 (de) * 1995-01-20 1996-07-25 Roland Man Druckmasch Steuerung für die Drucktuch-Wascheinrichtung einer Offset-Rotationsdruckmaschine mit mehreren Druckwerken
DE19606777C2 (de) * 1996-02-23 1999-12-30 Roland Man Druckmasch Vorrichtung zur Überwachung einer Waschvorrichtung einer Druckmaschine
DE10000903A1 (de) * 1999-02-05 2000-08-10 Heidelberger Druckmasch Ag Verfahren zum Betrieb einer Druckmaschine und Druckmaschine zur Durchführung des Verfahrens
US6915742B2 (en) * 2001-09-26 2005-07-12 Mitsubishi Heavy Industries, Ltd. Blanket washing method and blanket washing solution removing method for use in web offset printing press
DE10154430B4 (de) * 2001-11-06 2009-04-02 Manroland Ag Verfahren und Vorrichtung zum Löschen eines Druckbildes auf einer Druckform für eine Druckmaschine
DE10317262A1 (de) * 2003-04-14 2004-11-25 Koenig & Bauer Ag Verfahren zum Herstellen eines Druckerzeugnisses, eine Rollendruckmaschine mit einem Abroller und einer oder mehreren Druckeinheiten und eine Vereinzelungsvorrichtung für eine Rollendruckanlage
JP2005088541A (ja) * 2003-09-19 2005-04-07 Komori Corp 印刷機の洗浄方法および装置
DE102004047456A1 (de) * 2004-09-30 2006-08-03 Man Roland Druckmaschinen Ag Verfahren und Vorrichtung zum Auftragen eines Mediums auf eine Druckform
US8789465B2 (en) 2006-04-19 2014-07-29 Hewlett-Packard Development Company, L.P. Printing press color replacement and cleaning system
DE102007005568B4 (de) * 2007-02-05 2011-03-03 Koenig & Bauer Aktiengesellschaft Verfahren zum Abrüsten einer Rotationsdruckmaschine
DE102008001923A1 (de) * 2008-05-21 2009-11-26 Manroland Ag Verfahren zum Betreiben einer Bogendruckmaschine
US9616657B2 (en) 2013-10-01 2017-04-11 Goss International Americas, Inc. Closed loop ink thickness control system with reduced substrate waste in a printing press
DE202014105776U1 (de) 2014-11-28 2014-12-04 AMS Albrecht & Graul GmbH Reinigungsvorrichtung zum bedarfsweisen Reinigen von Endlos-Transportbändern

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EP0570676A1 (fr) * 1992-05-16 1993-11-24 Grafotec Kotterer Gmbh Dispositif de nettoyage d'un cylindre
GB2267868A (en) * 1992-06-02 1993-12-22 Heidelberger Druckmasch Ag Method of and device for determining the degree of fouling of a printing unit of a printing machine

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EP0423093A2 (fr) * 1989-10-10 1991-04-17 Jimek International Ab Méthode et dispositif pour le nettoyage de rouleaux de guidage
EP0570676A1 (fr) * 1992-05-16 1993-11-24 Grafotec Kotterer Gmbh Dispositif de nettoyage d'un cylindre
GB2267868A (en) * 1992-06-02 1993-12-22 Heidelberger Druckmasch Ag Method of and device for determining the degree of fouling of a printing unit of a printing machine

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0715956A3 (fr) * 1994-12-06 1996-11-27 Roland Man Druckmasch Méthode et dispositif de nettoyage d'un cylindre d'une machine à imprimer rotative
EP0755787A2 (fr) 1995-07-26 1997-01-29 Grafotec Gmbh Dispositif pour nettoyer des surfaces de travail d'une machine d'imprimerie, notamment installation de lavage de blanchet
EP0755787A3 (fr) * 1995-07-26 1997-11-19 Grafotec Gmbh Dispositif pour nettoyer des surfaces de travail d'une machine d'imprimerie, notamment installation de lavage de blanchet
EP1661702A1 (fr) 2004-11-30 2006-05-31 Oxy-Dry Maschinen GmbH Méthode et appareil pour le nettoyage de cylindres dans une machine d'impression
DE102007043857A1 (de) * 2007-09-14 2009-03-19 Manroland Ag Verfahren zum Betreiben einer Rollendruckmaschine
US8887635B2 (en) 2011-05-02 2014-11-18 Heidelberger Druckmaschinen Ag Method for cleaning inking units in offset printing presses
DE102018211601A1 (de) * 2018-07-12 2020-01-16 Heidelberger Druckmaschinen Ag Verfahren zum Reinigen der Oberfläche wenigstens einer rotierbaren Komponente einer Druckmaschine von einem Druckfluid
US11338571B2 (en) 2018-07-12 2022-05-24 Heidelberger Druckmaschinen Ag Method for cleaning a printing fluid off a surface of at least one rotatable component of a printing machine

Also Published As

Publication number Publication date
KR100288991B1 (ko) 2001-05-02
CA2135722A1 (fr) 1995-05-13
FI945308A (fi) 1995-05-13
DK0654350T3 (da) 1997-10-20
EP0654350B1 (fr) 1997-04-09
DE59402365D1 (de) 1997-05-15
AU677716B2 (en) 1997-05-01
AU7776994A (en) 1995-06-08
DE4338625A1 (de) 1995-05-18
ES2103531T3 (es) 1997-09-16
KR950015527A (ko) 1995-06-17
FI106443B (fi) 2001-02-15
ATE151350T1 (de) 1997-04-15
JPH07251502A (ja) 1995-10-03
US6109182A (en) 2000-08-29
FI945308A0 (fi) 1994-11-11
GR3024070T3 (en) 1997-10-31
JP2918090B2 (ja) 1999-07-12

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