EP1661702A1 - Méthode et appareil pour le nettoyage de cylindres dans une machine d'impression - Google Patents

Méthode et appareil pour le nettoyage de cylindres dans une machine d'impression Download PDF

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Publication number
EP1661702A1
EP1661702A1 EP04028282A EP04028282A EP1661702A1 EP 1661702 A1 EP1661702 A1 EP 1661702A1 EP 04028282 A EP04028282 A EP 04028282A EP 04028282 A EP04028282 A EP 04028282A EP 1661702 A1 EP1661702 A1 EP 1661702A1
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EP
European Patent Office
Prior art keywords
sensor
degree
time
wash
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.)
Granted
Application number
EP04028282A
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German (de)
English (en)
Other versions
EP1661702B1 (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.)
Baldwin Oxy Dry GmbH
Original Assignee
Oxy Dry Maschinen 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 Oxy Dry Maschinen GmbH filed Critical Oxy Dry Maschinen GmbH
Priority to DE502004003789T priority Critical patent/DE502004003789D1/de
Priority to EP04028282A priority patent/EP1661702B1/fr
Priority to AT04028282T priority patent/ATE361833T1/de
Priority to US11/281,760 priority patent/US20060117977A1/en
Publication of EP1661702A1 publication Critical patent/EP1661702A1/fr
Application granted granted Critical
Publication of EP1661702B1 publication Critical patent/EP1661702B1/fr
Not-in-force legal-status Critical Current
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

Definitions

  • the invention relates to a method and a device for cleaning cylinders of a printing machine by means of an automated washing device according to the preambles of claims 1 and 14.
  • the mentioned printing machines have in common that an intensive contact between the printing substrate and the cylinder is necessary for the guidance, for the processing and for the drive of printing material sheets or printing material webs.
  • paper dust fibers, coating, fillers, etc.
  • ink ink
  • optionally powder dusting These deposits affect the cylinders in their functionality; For example, deposits on blanket cylinders in offset printing cause the dot sharpness of the print to be lost and some print sections to no longer print correctly.
  • the deposition rate is particularly high due to the high viscosity and adhesion of the ink.
  • automated washing devices In addition to the still found cleaning of cylinders by hand, automated washing devices have been used for some time for this purpose, as described for example in EP 0 419 289 A2.
  • Such an automated washing device 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 controller for the individual functions. If several washing devices are present in a printing machine, then they can be controlled by a central control unit, which enables remote control of the washing devices from a central control panel.
  • EP 0 654 350 A1 discloses a method for fully automatic cylinder cleaning in printing presses with a central control system. According to this prior art, the control system is extended by a control function, wherein a plurality of wash sequence programs is stored and the selection and optionally the time of starting a wash cycle program for a particular washing device is automatically determined by accessing the data of the central printing machine control system.
  • a too-intensive or earlier than necessary started wash sequence program can lead to problems because the degree of contamination of the cleaned cylinder does not correspond to the amount of applied washing liquids and accordingly a certain amount of washing liquid is not bound. Instead, in the worst case, this takes place as a spray and in the form of splashes in the surroundings of the cylinder and on other machine parts.
  • a washing liquid spray can condense at various points of the printing press, possibly collect there and drip onto the substrate; this then leads to the production of waste paper, which can occasionally occur during production, d. H. is almost impossible to sort out.
  • the present invention is therefore based on the object for the first time reliably avoid unnecessary or unnecessarily intensive washing operations in a method and apparatus of the type mentioned above and to optimize the timing and / or the intensity of the washing process.
  • an automated washing device which is controlled by a controller with a washing sequence program.
  • the wash cycle program may be fixed, or it may be several different, fixed predetermined wash sequence programs stored in the controller.
  • the controller generates based on data of current boundary conditions due to a predetermined algorithm, a wash process program itself, so as not to be limited to a limited number of predetermined wash sequence programs.
  • the start of the wash cycle program and / or the selection of one of several wash cycle programs can be done automatically or manually, for example, a manual start is only released when the washing of a cylinder makes sense.
  • an automatic delay of a manual start can be used, whereby the controller notices the manual start command and then implements the start at the earliest possible reasonable point in time.
  • mixed forms are also conceivable, for example, in that the controller automatically corrects a manual selection and a manual start of a wash cycle program with regard to the selection.
  • a sensor cooperating with the control is provided, which scans the surface of the cylinder to be cleaned or the printing material leaving this cylinder without contact.
  • This may, for example, be a known monitoring sensor for a closed-loop control of the color density control of the printing press, which may be present anyway in the printing press, the signals of which are additionally used for the method according to the invention.
  • the advanced washer control estimates based on the signals received from the sensor, the degree of contamination of the cylinder to be cleaned, which depends on this estimated current degree of contamination, the selection of the most suitable wash sequence program and / or the most suitable starting time for the start of the wash cycle program is determined.
  • the sensor signals are evaluated by the washer control such that from the time course of the sensor signals a forecast for the degree of pollution at a given future time or a prognosis for the course of the pollution level is created and this forecast for the selection and / or the most appropriate start time of the wash cycle program is used.
  • a sensor for estimating or predicting the degree of contamination naturally provides a much higher reliability of the estimated or predicted data compared to a typical estimation or prognosis only on the basis of the known machine and production data; especially since the nature of the contamination of the cylinders of a printing press also depends on how the responsible printer operates the printing press.
  • the start and / or selection of the wash cycle program can be influenced by the signals of the sensor such that the start of a certain wash cycle program is released, delayed, or performed automatically only after a threshold of the estimated contamination level.
  • the threshold value can be predetermined here; On the other hand, it is particularly advantageous if the threshold value can be preset, that is to say it can be adapted to the respective conditions on site.
  • wash cycle program As long as only one wash cycle program is present in the controller, or as far as the wash cycle program is generated in the controller by means of an algorithm in real time, according to this embodiment of the invention, then when a predetermined or preset threshold of the basis of the sensor signals estimated pollution level is reached or exceeded , the wash sequence program is started, generated or released, for example, for a manual start, possibly with an automatically generated delay. If the control of the washing device or washing devices holds several washing sequence programs stored, According to the estimated or predicted degree of soiling, a specific wash sequence program can be selected.
  • the invention can also serve for the fact that in the case of several graduated-intensity wash sequence programs, one or more wash sequence programs for, for example, a manual start are only released when one of a plurality of threshold values assigned to the wash sequence program is reached.
  • a threshold time is predicted at which a predetermined or presettable threshold of the estimated level of contamination is exceeded while a wash schedule is started at a start time approximately equal to the time duration that the selected wash schedule needs to process before the threshold time.
  • a threshold time is predicted at which a predetermined or presettable threshold of the estimated level of contamination is exceeded while a wash schedule is started at a start time approximately equal to the time duration that the selected wash schedule needs to process before the threshold time.
  • the start of a wash cycle program can in any case be advanced in time if, based on the sensor signals and their course, an increase in the degree of contamination that accelerates over time is forecast.
  • the inventive estimation and prediction of the degree of soiling of the individual cylinders to be cleaned can be corrected by means of a sensor or refined from the other operating parameters obtained prognosis on the degree of contamination of the cylinder to be cleaned can be used.
  • the consideration of the sensor signals according to the invention takes place in such a way that a wash cycle program optimized for the cleaning process and / or the time for its startup is determined not with regard to the cleaning result but with respect to the minimum required time duration.
  • This takes into account the predicted future course of the degree of contamination and taking into account further production data of the printing press, so in particular a previously known production interruption due to a paper roll change or due to a standstill in a conversion to other printing plates.
  • the washing devices can work while they cause a minimized or no waste.
  • an already present on the printing machine monitoring sensor is particularly preferably used, in particular a monitoring sensor for the color density control of the printing press; because this interacts with the color density control in any case so that it forms a control loop with this, its signals, which detects the printed image on the printing paper leaving the cylinder to be cleaned by optical scanning, are used as a control variable for the color density.
  • a monitoring sensor for the color density control of the printing press
  • its signals which detects the printed image on the printing paper leaving the cylinder to be cleaned by optical scanning
  • the estimation of the degree of contamination is preferably carried out programmatically by comparing the signals of the sensor with a stored plurality of sensor signal patterns, wherein for each stored sensor signal pattern a typical degree of contamination is deposited and insofar as created by means of an algorithm best match of the measured sensor signal pattern with a the stored sensor signal pattern allows the estimation of the degree of contamination according to the invention.
  • the inventively present sensor can be an optical sensor, in particular with a (digital) camera, with the example, a dot magnification in the print image on the cylinder to be cleaned leaving printing material can be optically detected, or with a laser.
  • the scanning of the surface of the cylinder or the printing material to be cleaned can be effected capacitively or by means of sound wave reflection or sound wave transmission.
  • the control of the device according to the invention can be integrated as a software module in the control of the car wash or in a control of other already existing control systems, such as the control of the color density. This saves costs and maintenance.
  • FIG. 1 the basic structure of an embodiment of a device according to the invention is shown schematically.
  • a washing device 1 is controlled by a controller 2, the controller 2 being influenced by the signals of an imaging sensor 3, which optically scans a paper web 4 serving as printing material, via a sensor signal evaluation electronics 5.
  • the sensor 3 is a color density sensor head that moves across the paper web 4 passing below it and measures the color density of the printed image.
  • the sensor signal evaluation 5 calculates the manipulated variable for the control loop of a color control 6 of the printing press, and is therefore already available at the printing press.
  • the sensor signals from the transmitter 5 are diverted to the controller 2 of the washing device 1, wherein optionally - indicated by broken lines - a signal path 7 is set, so that the controller 2, which is realized in the present case as a software module, can act on the sensor signal evaluation electronics 5 to generate the data required for the control of the washing device 1 and in particular the selection of washing sequence programs and the start of the same.
  • FIG. 2 is a flow chart illustrating the operation of the structure shown in principle in FIG.
  • the printed by the imaging sensor 3, here a CCD camera printed image on the paper web 4 and the corresponding digital signals are first divided into the sensor signal transmitter 5 in the hues of black, cyan, magenta and yellow, after which separated for these colors
  • the controller 2 takes the detected pressure point size as a measure of the degree of soiling of the cylinder to be cleaned and calculates the time differential dg / dt in parallel from the time profile of the detected pressure point quantities, in order to use this together with the currently measured pressure point size a prognosis for the future increase in pressure point size.
  • the controller 2 compares the currently measured pressure point quantities with the set limit value and calculates, based on the calculated prognosis for the future course of the pressure point increase in size, the threshold time point at which the pressure point magnitude is likely to exceed the set limit value. This calculation is performed separately for all the colors, after which the respective threshold timings are again set in relation to each other and then the time at which a cleaning of the cylinder or of the plurality of cylinders controlled by the present controller 2 is calculated is calculated. Taking into account further parameters of the printing press, it is then automatically decided on the basis of this message (this process is no longer illustrated in FIG. 2) when and with which wash cycle program the washing device 1 is started.
  • FIG. 3 again schematically illustrates the increase in the pressure point size which is used as a measure of the degree of soiling of a blanket cylinder.

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  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP04028282A 2004-11-30 2004-11-30 Méthode et appareil pour le nettoyage de cylindres dans une machine d'impression Not-in-force EP1661702B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE502004003789T DE502004003789D1 (de) 2004-11-30 2004-11-30 Verfahren und Vorrichtung zur Reinigung von Zylindern einer Druckmaschine
EP04028282A EP1661702B1 (fr) 2004-11-30 2004-11-30 Méthode et appareil pour le nettoyage de cylindres dans une machine d'impression
AT04028282T ATE361833T1 (de) 2004-11-30 2004-11-30 Verfahren und vorrichtung zur reinigung von zylindern einer druckmaschine
US11/281,760 US20060117977A1 (en) 2004-11-30 2005-11-17 Method and apparatus for cleaning cylinders of a printing press

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04028282A EP1661702B1 (fr) 2004-11-30 2004-11-30 Méthode et appareil pour le nettoyage de cylindres dans une machine d'impression

Publications (2)

Publication Number Publication Date
EP1661702A1 true EP1661702A1 (fr) 2006-05-31
EP1661702B1 EP1661702B1 (fr) 2007-05-09

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP04028282A Not-in-force EP1661702B1 (fr) 2004-11-30 2004-11-30 Méthode et appareil pour le nettoyage de cylindres dans une machine d'impression

Country Status (4)

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US (1) US20060117977A1 (fr)
EP (1) EP1661702B1 (fr)
AT (1) ATE361833T1 (fr)
DE (1) DE502004003789D1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008047429A1 (de) * 2008-09-15 2010-04-15 Baldwin Germany Gmbh Verfahren und Vorrichtung zum Reinigen von Zylindern einer Rollenrotations-Druckmaschine
DE102010053989A1 (de) * 2010-12-09 2012-06-14 Heidelberger Druckmaschinen Ag Sensor für Wascheinrichtung
WO2013144078A1 (fr) * 2012-03-30 2013-10-03 Stora Enso Oyj Procédé de surveillance de l'accumulation des impuretés sur un blanchet en caoutchouc
EP3594000A1 (fr) * 2018-07-12 2020-01-15 Heidelberger Druckmaschinen AG Procédé de nettoyage de la surface d'au moins un composant rotatif d'une machine à imprimer d'un fluide d'impression

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009006268B4 (de) 2008-02-26 2017-12-14 Heidelberger Druckmaschinen Ag Verfahren zum Reinigen einer Mantelfläche eines Gummituchzylinders einer Nassoffsetdruckmaschine
DE102008053249A1 (de) * 2008-10-25 2010-04-29 Robert Bosch Gmbh Verfahren zur Steuerung einer Bearbeitungsmaschine mit angetriebenen Achsen
US8412642B2 (en) 2010-06-15 2013-04-02 Conagra Foods Food Ingredients Company, Inc. Transport scheduling for low microbial bulk products
JP7441672B2 (ja) 2020-02-17 2024-03-01 リョービＭｈｉグラフィックテクノロジー株式会社 印刷機用のブランケットの洗浄要否判定モジュール、及び洗浄要否判定方法、洗浄要否判定プログラム
KR20210112805A (ko) * 2020-03-06 2021-09-15 휴렛-팩커드 디벨롭먼트 컴퍼니, 엘.피. 용지 감지 센서의 감지 정보를 이용한 클리닝 부재 제어
WO2023187795A1 (fr) * 2022-03-29 2023-10-05 Bennett, Coleman & Co. Ltd. Unité de nettoyage automatique pour une presse à imprimer

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US4967664A (en) * 1988-12-06 1990-11-06 Kabushiki Kaisha Tokyo Kikai Seisakusho Method and apparatus for automatically cleaning liquid supply rollers of offset press
EP0419289A2 (fr) 1989-09-22 1991-03-27 Oxy-Dry Corporation Système de nettoyage de cylindre d'imprimerie
DE4218127A1 (de) * 1992-06-02 1993-12-09 Heidelberger Druckmasch Ag Verfahren und Vorrichtung zur Bestimmung des Verschmutzungsgrads eines Druckwerks einer Druckmaschine
EP0605074A1 (fr) * 1992-12-28 1994-07-06 Sakurai Graphic Systems Corp. Dispositif de nettoyage des rouleaux d'encrage pour une machine à imprimer
EP0654350A1 (fr) 1993-11-12 1995-05-24 Oxy-Dry Maschinen GmbH Procédé pour le nettoyage automatique de cyclindres dans des machines d'impression à commande centrale
EP1375142A2 (fr) * 2002-06-21 2004-01-02 Koenig & Bauer Aktiengesellschaft Machine d'impression rotative avec une unité de couchage et procédure de revêtement d'un cylindre de transfert de feuilles

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DE3723400C1 (de) * 1987-07-15 1989-02-23 Baldwin Gegenheimer Gmbh Verfahren und Vorrichtung zum Reinigen von Zylindern einer Rollendruckmaschine
US4922337B1 (en) * 1988-04-26 1994-05-03 Picker Int Inc Time delay and integration of images using a frame transfer ccd sensor
USRE35444E (en) * 1992-12-28 1997-02-11 Sakurai Graphic Systems Corporation Ink washing device for a printing machine
DE4313889C2 (de) * 1993-04-28 1994-08-25 Voith Gmbh J M Streicheinrichtung für laufende Bahnen aus Papier oder Karton
US5608639A (en) * 1995-01-13 1997-03-04 Wallace Computer Services, Inc. System and method for printing, assembly and verifying a multiple-part printed product
DE19527249C2 (de) * 1995-07-26 1999-11-11 Grafotec Gmbh Vorrichtung zum Reinigen von Arbeitsflächen einer Druckmaschine
DE19705632A1 (de) * 1997-02-14 1998-09-03 Roland Man Druckmasch Verfahren und Anordnung zur Reinigung eines Teiles eines Druckwerkes einer Offsetdruckmaschine
WO2002020901A1 (fr) * 2000-09-06 2002-03-14 Metso Paper, Inc. Procede et equipement de nettoyage et de support de rouleaux

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4967664A (en) * 1988-12-06 1990-11-06 Kabushiki Kaisha Tokyo Kikai Seisakusho Method and apparatus for automatically cleaning liquid supply rollers of offset press
EP0419289A2 (fr) 1989-09-22 1991-03-27 Oxy-Dry Corporation Système de nettoyage de cylindre d'imprimerie
DE4218127A1 (de) * 1992-06-02 1993-12-09 Heidelberger Druckmasch Ag Verfahren und Vorrichtung zur Bestimmung des Verschmutzungsgrads eines Druckwerks einer Druckmaschine
EP0605074A1 (fr) * 1992-12-28 1994-07-06 Sakurai Graphic Systems Corp. Dispositif de nettoyage des rouleaux d'encrage pour une machine à imprimer
EP0654350A1 (fr) 1993-11-12 1995-05-24 Oxy-Dry Maschinen GmbH Procédé pour le nettoyage automatique de cyclindres dans des machines d'impression à commande centrale
EP1375142A2 (fr) * 2002-06-21 2004-01-02 Koenig & Bauer Aktiengesellschaft Machine d'impression rotative avec une unité de couchage et procédure de revêtement d'un cylindre de transfert de feuilles

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008047429A1 (de) * 2008-09-15 2010-04-15 Baldwin Germany Gmbh Verfahren und Vorrichtung zum Reinigen von Zylindern einer Rollenrotations-Druckmaschine
DE102010053989A1 (de) * 2010-12-09 2012-06-14 Heidelberger Druckmaschinen Ag Sensor für Wascheinrichtung
WO2013144078A1 (fr) * 2012-03-30 2013-10-03 Stora Enso Oyj Procédé de surveillance de l'accumulation des impuretés sur un blanchet en caoutchouc
EP3594000A1 (fr) * 2018-07-12 2020-01-15 Heidelberger Druckmaschinen AG Procédé de nettoyage de la surface d'au moins un composant rotatif d'une machine à imprimer d'un fluide d'impression
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
ATE361833T1 (de) 2007-06-15
EP1661702B1 (fr) 2007-05-09
DE502004003789D1 (de) 2007-06-21
US20060117977A1 (en) 2006-06-08

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