EP0771651B1 - Method for cleaning a cylinder of a printing press - Google Patents

Method for cleaning a cylinder of a printing press Download PDF

Info

Publication number
EP0771651B1
EP0771651B1 EP96116302A EP96116302A EP0771651B1 EP 0771651 B1 EP0771651 B1 EP 0771651B1 EP 96116302 A EP96116302 A EP 96116302A EP 96116302 A EP96116302 A EP 96116302A EP 0771651 B1 EP0771651 B1 EP 0771651B1
Authority
EP
European Patent Office
Prior art keywords
dryer
cleaning
cylinder
cleaning process
printing press
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
EP96116302A
Other languages
German (de)
French (fr)
Other versions
EP0771651A2 (en
EP0771651A3 (en
Inventor
Rudolf Mitze
Horst Müller
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
MAN Roland Druckmaschinen 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
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0771651A2 publication Critical patent/EP0771651A2/en
Publication of EP0771651A3 publication Critical patent/EP0771651A3/en
Application granted granted Critical
Publication of EP0771651B1 publication Critical patent/EP0771651B1/en
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

Definitions

  • the invention relates to a method for cleaning a cylinder of a rotary printing press, with a washing device with an associated suction device and one arc-guiding cylinder and adjacent to the washing device Dryer.
  • EP 0 419 289 A2 describes a web-fed rotary printing press with one Washing devices coupled printing units downstream dryer device known, the air flow rate can be increased at the beginning of the cleaning process.
  • DE 39 01 105 C1 describes a method and an apparatus for Cleaning cylinders in a web-fed rotary printing press is known.
  • the dryer device is in turn subordinate to the printing units and at the beginning of Cleaning process, the suction device of the dryer device is activated.
  • the object of the invention is a method for cleaning a printing press cylinder to develop with the dryer arranged next to it, which reduces downtimes shortens the cleaning process and the necessary safety requirements Fulfills.
  • the downtimes of the printing press caused by the interaction the washing device with the dryer device noticeably reduced. This is because the dryer device is no longer shut down during the cleaning process must become. Rather, the dryer performance is different from that for the printing process previously determined performance value reduced to a specified lower performance value.
  • the dryer remains in stand-by mode while the washing device is activated with the suction device. At the end of the cleaning process (Washing device and suction device are shut down) the dryer device from stand-by mode to the previously defined dryer output. In stand-by mode, the dryer output is relatively low, so there is no risk of explosion exists, but the start-up time to reach the previously determined dryer performance relative is short.
  • the invention will be explained using an exemplary embodiment.
  • the method is based on a washing device which can be turned on and off on a printing press cylinder, for example a blanket cylinder, a forme cylinder for a coating unit or an impression cylinder.
  • the washing device is assigned a suction device which is coupled to a suction source and at least one line to the outside.
  • a dryer device is also arranged adjacent to the washing device.
  • the dryer device is assigned to a sheet-guiding cylinder. This can be the impression cylinder or a transfer cylinder of the printing press.
  • the dryer is activated in printing mode. If the cleaning process is now to be carried out, the washing device and the suction device are activated and at the same time the performance of the drying device is reduced to a value which enables a relatively low heat development.
  • the suction device is stopped and at the same time the performance of the drying device is increased to a predetermined value.
  • the first value of the performance of the dryer device for the cleaning process is less than or equal to 50% of the total dryer performance.
  • the second value of the dryer output after the cleaning process is over 50%.
  • the values for the dryer performance can be freely selected via a control.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Abstract

A method for cleaning cylinders of a rotary printing press having washer and suction devices and an adjacently mounted dryer which shortens the down time during the cleaning operation and at the same time satisfies safety requirements. At the beginning of a cleaning process, the dryer is reduced from its normal operating output level to a predetermined lower operating output level which eliminates the risk of combustion with cleaning fluid vapors. At the end of the cleaning process, the operating output of the dryer is increased from its reduced level to its normal operating level in a significantly shortened period of time, as compared to conventional practice, resulting in reduced down time for the printing machine during the cleaning operation.\!

Description

Die Erfindung betrifft ein Verfahren zur Reinigung eines Zylinders einer Rotationsdruckmaschine, mit einer Waschvorrichtung mit zugeordneter Absaugeinrichtung und einer einem bogenführenden Zylinder zugeordneten und der Waschvorrichtung benachbarten Trocknereinrichtung.The invention relates to a method for cleaning a cylinder of a rotary printing press, with a washing device with an associated suction device and one arc-guiding cylinder and adjacent to the washing device Dryer.

Um den Reinigungsprozeß durchführen zu können werden derzeit die in der Druckmaschine vorhandenen Trocknereinrichtungen stillgesetzt. Diese Verfahrensweise ist aus sicherheitstechnischen Gründen notwendig, erhöht jedoch die Stillstandszeiten, da erst nach dem Reinigungsprozeß die Trocknereinrichtung wieder auf ihre vorherbestimmten Leistungswerte "hochgefahren" werden kann. Dieses "Hochfahren" dauert wiederum einige Zeit, was die Stillstandszeit der Druckmaschine erhöht. Beim Reinigungsprozeß eines Zylinders können Reinigungsfluiderosole und/oder Reinigungsfluiddämpfe von der Waschvorrichtung an die Umgebung austreten. Bei einer der aktivierten Waschvorrichtung benachbart angeordneten und ebenfalls aktivierten Trocknereinrichtung besteht dann die Gefahr, daß durch die Wärmeentwicklung und das Reinigungsfluid ein explosives Gemisch entsteht. In order to be able to carry out the cleaning process, there are currently those in the printing press existing dryer facilities shut down. This procedure is for safety reasons Necessary for reasons, but increases downtimes, since only after Cleaning process the dryer device back to its predetermined performance values can be "started up". This "start-up" takes some time, which increases the downtime of the press. During the cleaning process of a cylinder can cleaning fluid aerosols and / or cleaning fluid vapors from the washing device leak to the environment. Adjacent to the activated washing device arranged and also activated dryer means there is a risk that an explosive mixture results from the heat development and the cleaning fluid.

Gemäß der DE 38 41 411 C1 ist ein Verfahren sowie eine Vorrichtung zum Reinigen von Zylindern in einer Rollenrotationsoffsetdruckmaschine bekannt, die eine Explosionsgefährdung, welche durch die Trocknereinrichtung in Verbindung mit der Reinigungsvorrichtung besteht, ausschließen soll. Durch Messung der Gaskonzentration in der Trocknereinrichtung erfolgt die Zudosierung von Reinigungsflüssigkeit gesteuert gegenüber einem festgelegten Führungsgrößenverlauf. Die Trocknereinrichtung ist dabei als separate Einheit den Druckwerken nachgeordnet.According to DE 38 41 411 C1 is a method and a device for cleaning of cylinders in a web-fed rotary offset printing press known to pose an explosion hazard, which by the dryer device in connection with the cleaning device exists, should exclude. By measuring the gas concentration in the dosing of cleaning liquid is controlled by the dryer compared to a defined reference variable course. The dryer device is subordinate to the printing units as a separate unit.

Aus der EP 0 419 289 A2 ist eine Rollenrotationsdruckmaschine mit einer dem mit Waschvorrichtungen gekoppelten Druckwerken nachgeordneten Trocknereinrichtung bekannt, deren Luftdurchsatz zu Beginn des Reinigungsprozesses erhöhbar ist.EP 0 419 289 A2 describes a web-fed rotary printing press with one Washing devices coupled printing units downstream dryer device known, the air flow rate can be increased at the beginning of the cleaning process.

Schließlich ist aus der DE 39 01 105 C1 ein Verfahren und eine Vorrichtung zum Reinigen von Zylindern in einer Rollenrotationsdruckmaschine bekannt. Die Trocknereinrichtung ist wiederum den Druckwerken nachgeordnet und zu Beginn des Reinigungsprozesses wird die Absaugeinrichtung der Trocknereinrichtung aktiviert. Finally, DE 39 01 105 C1 describes a method and an apparatus for Cleaning cylinders in a web-fed rotary printing press is known. The dryer device is in turn subordinate to the printing units and at the beginning of Cleaning process, the suction device of the dryer device is activated.

Aufgabe der Erfindung ist es ein Verfahren zur Reinigung einer Druckmaschinenzylinders mit benachbart angeordneter Trocknereinrichtung zu entwickeln, das die Stillstandszeiten beim Reinigungsprozeß verkürzt und die erforderlichen sicherheitstechnischen Anforderungen erfüllt.The object of the invention is a method for cleaning a printing press cylinder to develop with the dryer arranged next to it, which reduces downtimes shortens the cleaning process and the necessary safety requirements Fulfills.

Gelöst wird dies durch die Ausbildungsmerkmale des Hauptanspruches. Weiterbildungen ergeben sich aus den Unteransprüchen.This is solved by the training features of the main claim. Training result from the subclaims.

Durch die Erfindung werden die Stillstandszeiten der Druckmaschine, die durch das Zusammenwirken der Waschvorrichtung mit der Trocknereinrichtung entstehen, spürbar reduziert. Dies deshalb, da die Trocknereinrichtung beim Reinigungsprozeß nicht mehr stillgesetzt werden muß. Vielmehr wird die Trocknerleistung von dem für den Druckprozeß vorher bestimmten Leistungswert auf einen festgelegten niedrigeren Leistungswert reduziert. Die Trocknereinrichtung bleibt dabei im Stand-by-Betrieb, während die Waschvorrichtung mit der Absaugeinrichtung aktiviert ist. Nach Beendigung des Reinigungsprozeßes (Waschvorrichtung und Absaugeinrichtung sind stillgesetzt) wird die Trocknereinrichtung aus dem Stand-by-Betrieb auf die vorher festgelegte Trocknerleistung hochgefahren. Im Stand-by-Betrieb ist die Trocknerleistung relativ gering, so daß keine Explosionsgefahr besteht, jedoch die Anlaufzeit zum Erreichen der vorher bestimmten Trocknerleistung relativ kurz ist.By means of the invention, the downtimes of the printing press caused by the interaction the washing device with the dryer device, noticeably reduced. This is because the dryer device is no longer shut down during the cleaning process must become. Rather, the dryer performance is different from that for the printing process previously determined performance value reduced to a specified lower performance value. The dryer remains in stand-by mode while the washing device is activated with the suction device. At the end of the cleaning process (Washing device and suction device are shut down) the dryer device from stand-by mode to the previously defined dryer output. In stand-by mode, the dryer output is relatively low, so there is no risk of explosion exists, but the start-up time to reach the previously determined dryer performance relative is short.

Die Erfindung soll an einem Ausführungsbeispiel erläutert werden.
Das Verfahren geht dabei von einer Waschvorrichtung aus, die an einem Druckmaschinenzylinder, beispielsweise einem Gummituchzylinder, einem Formzylinder für ein Lackierwerk oder einen Gegendruckzylinder an- und abstellbar ist. Der Waschvorrichtung ist eine Absaugeinrichtung zugeordnet, die mit einer Saugquelle und mindestens einer Leitung ins Freie gekoppelt ist. Der Waschvorrichtung ist weiterhin eine Trocknereinrichtung benachbart angeordnet. Die Trocknereinrichtung ist dabei einem bogenführenden Zylinder zugeordnet. Dies kann der Gegendruckzylinder oder auch ein Transferzylinder der Druckmaschine sein. Im Druckbetrieb ist die Trocknereinrichtung aktiviert.
Soll jetzt der Reinigungsprozeß durchgeführt werden, so wird die Waschvorrichtung sowie die Absaugeinrichtung aktiviert und gleichzeitig wird die Leistung der Trocknereinrichtung auf einen Wert reduziert, der eine relativ geringe Wärmeentwicklung ermöglicht. Nach Ende des Reinigungsprozeßes wird die Absaugeinrichtung stillgesetzt und gleichzeitig wird die Leistung der Trockereinrichtung auf einen vorher festgelegten Wert erhöht. In bevorzugter Ausführung ist der erste Wert der Leistung der Trocknereinrichtung für den Reinigungsprozeß kleiner oder gleich 50% der Gesamttrocknerleistung. Der zweite Wert der Trocknerleistung nach Beendigung des Reinigungsprozeßes ist größer 50%. Die Werte für die Trocknerleistung sind über eine Steuerung frei wählbar.The invention will be explained using an exemplary embodiment.
The method is based on a washing device which can be turned on and off on a printing press cylinder, for example a blanket cylinder, a forme cylinder for a coating unit or an impression cylinder. The washing device is assigned a suction device which is coupled to a suction source and at least one line to the outside. A dryer device is also arranged adjacent to the washing device. The dryer device is assigned to a sheet-guiding cylinder. This can be the impression cylinder or a transfer cylinder of the printing press. The dryer is activated in printing mode.
If the cleaning process is now to be carried out, the washing device and the suction device are activated and at the same time the performance of the drying device is reduced to a value which enables a relatively low heat development. After the cleaning process, the suction device is stopped and at the same time the performance of the drying device is increased to a predetermined value. In a preferred embodiment, the first value of the performance of the dryer device for the cleaning process is less than or equal to 50% of the total dryer performance. The second value of the dryer output after the cleaning process is over 50%. The values for the dryer performance can be freely selected via a control.

Claims (3)

  1. Method for cleaning a cylinder of a rotary printing press with a washing device with fitted suction unit for the feeding away of cleaning fluid, aerosols and/or cleaning fluid vapours and which can be set on and off against the rotating cylinder, and a neighbouring activated dryer unit fitted to a sheet guiding cylinder, characterised in that at the beginning of the cleaning process, the washing device as well as the suction unit is actuated and simultaneously the power of the dryer unit is reduced to a fixed first value, so that the dryer unit operates in standby operation and that at the end of the cleaning process, the washing device as well as the suction device are rendered stationary and simultaneously the power of the dryer unit is raised from the standby operation to a fixed second value.
  2. Method according to Claim 1, characterised in that the fixed first value is < 50% of the power of the dryer unit.
  3. Method according to Claim 1, characterised in that the fixed second value is > 50% of the power of the dryer unit.
EP96116302A 1995-11-04 1996-10-11 Method for cleaning a cylinder of a printing press Expired - Lifetime EP0771651B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19541160 1995-11-04
DE19541160A DE19541160C1 (en) 1995-11-04 1995-11-04 Process for cleaning a cylinder of a rotary printing press

Publications (3)

Publication Number Publication Date
EP0771651A2 EP0771651A2 (en) 1997-05-07
EP0771651A3 EP0771651A3 (en) 1997-05-14
EP0771651B1 true EP0771651B1 (en) 1998-12-02

Family

ID=7776636

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96116302A Expired - Lifetime EP0771651B1 (en) 1995-11-04 1996-10-11 Method for cleaning a cylinder of a printing press

Country Status (5)

Country Link
US (1) US5755159A (en)
EP (1) EP0771651B1 (en)
JP (1) JP2930196B2 (en)
AT (1) ATE173974T1 (en)
DE (2) DE19541160C1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10227758A1 (en) * 2002-06-21 2004-01-29 Koenig & Bauer Ag Rotary printing machine with a coating unit and method for coating sheet-guiding cylinders
KR101192788B1 (en) * 2005-10-13 2012-10-18 엘지디스플레이 주식회사 Printing Device System and Patterning method using the same
CN112693226B (en) * 2020-12-28 2022-08-16 河南省联发纸业有限公司 Stoving case among UV lithography apparatus

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2117385A5 (en) * 1970-12-10 1972-07-21 Moestue Hans
DD135882A1 (en) * 1977-09-05 1979-06-06 Hans Johne FORM ROTARY PRINTING PRESS
DE3723400C1 (en) * 1987-07-15 1989-02-23 Baldwin Gegenheimer Gmbh Method and device for cleaning cylinders of a web printing press
DE3901105C1 (en) * 1987-07-15 1990-01-11 Baldwin-Gegenheimer Gmbh, 8900 Augsburg, De Method and apparatus for cleaning cylinders of a web-fed printing machine
DE3841411C1 (en) * 1988-12-08 1990-07-26 Baldwin-Gegenheimer Gmbh, 8900 Augsburg, De
DE3939190A1 (en) * 1989-01-25 1990-08-09 Baldwin Gegenheimer Gmbh CONTINUOUS DRYER OF ROLLER ROTATION PRINTING MACHINES AND OPERATION OF SUCH A CONTINUOUS DRYER FOR CONTINUOUS PRESSURE AND CYLINDER WASHING WITH A RUNNING TRAIN
US5109770A (en) * 1989-09-22 1992-05-05 Oxy-Dry Corporation Printing cylinder cleaning system
US5214442A (en) * 1991-09-27 1993-05-25 Xerox Corporation Adaptive dryer control for ink jet processors
DE4327209A1 (en) * 1992-09-11 1994-03-17 Heidelberger Druckmasch Ag Cleaning and disposal system within a production machine
DE4301410A1 (en) * 1993-01-20 1994-07-21 Baldwin Gegenheimer Gmbh Printing machine cleaning device

Also Published As

Publication number Publication date
EP0771651A2 (en) 1997-05-07
DE59600901D1 (en) 1999-01-14
DE19541160C1 (en) 1997-01-30
ATE173974T1 (en) 1998-12-15
US5755159A (en) 1998-05-26
JP2930196B2 (en) 1999-08-03
JPH09164665A (en) 1997-06-24
EP0771651A3 (en) 1997-05-14

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