EP0557607A1 - Dispositif à nettoyer d'un cylindre d'une rotative d'impression - Google Patents

Dispositif à nettoyer d'un cylindre d'une rotative d'impression Download PDF

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Publication number
EP0557607A1
EP0557607A1 EP92121224A EP92121224A EP0557607A1 EP 0557607 A1 EP0557607 A1 EP 0557607A1 EP 92121224 A EP92121224 A EP 92121224A EP 92121224 A EP92121224 A EP 92121224A EP 0557607 A1 EP0557607 A1 EP 0557607A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
gap
cleaning device
labyrinth
distributor
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
EP92121224A
Other languages
German (de)
English (en)
Other versions
EP0557607B1 (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 EP0557607A1 publication Critical patent/EP0557607A1/fr
Application granted granted Critical
Publication of EP0557607B1 publication Critical patent/EP0557607B1/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
    • B41F35/02—Cleaning arrangements or devices for forme cylinders
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2235/00—Cleaning
    • B41P2235/10—Cleaning characterised by the methods or devices
    • B41P2235/26—Spraying devices

Definitions

  • the invention relates to a cleaning device for a cylinder of a rotary printing press according to the preamble of claim 1.
  • the cleaning device is used in particular for cleaning a printing cylinder or a blanket cylinder of a printing press.
  • the cleaning device contains a distributor for automatically controlled spraying of cleaning liquid onto the cylinder, and guide elements, which are located next to the Extend the spray jet from the distributor to the cylinder and form a narrow gap between itself and the cylinder behind and in front of the spray jet, the rear gap being the first gap in the direction of rotation of the cylinder and the front gap being the second gap in the direction of rotation of the cylinder.
  • a cleaning device of this type is known from US Pat. No. 3,084,626.
  • the guide elements are spaced apart from the spray jet, so that they do not limit the spray jet, but only prevent liquid parts from inadvertently spraying onto adjacent machine parts.
  • US Pat. No. 3,900,003 shows a liquid application device for applying developer liquid to a cylinder in a multicolor electrophotography copying machine.
  • AT-PS 282 662 shows a wiping cylinder which has a cylinder section which is immersed in a vessel with cleaning fluid and a section which lies against a cylinder of a printing press to be cleaned. Cleaning liquid for rinsing the wiping cylinder is sprayed onto the area of the wiping cylinder emerging from the liquid between two spaced-apart doctor blades.
  • DE-PS 12 40 885 shows a suction box opposite a pressure cylinder. The suction box can be pivoted through an axis parallel to the cylinder and forms a gap with the cylinder.
  • the suction box is provided with brushes at the gap inlet and at the gap outlet and has suction holes in the area between these brushes for suctioning dust from the surface of a paper to be printed, which is around the cylinder surface running.
  • DE utility model 1 996 060 shows a device for spraying liquid into the gap between two rollers in the printing unit of an offset printing press in order to moisten its printing plates. The dispensing of the liquid is controlled in a pulse-like manner by a control device of the printing press as a function of the printing speed and as a function of a selectable factor and with a selectable spray duration.
  • a coating device for coating paper webs which forms a paint application storage space opposite the paper web guided by a cylinder, which is provided with a labyrinth overflow seal against the direction of rotation of the paper web and the cylinder.
  • Cleaning devices of this type are used to loosen the dirt that accumulates during the printing process and adheres to the cylinder surface.
  • a squeegee or a cloth soaking up the dirt with solvent is used to remove the dirt softened by the cleaning liquid.
  • the dirt is also removed directly from the web when the cylinder subjected to the cleaning process is in contact with the web unwind.
  • Another principle is based on the application of the cleaning liquid by means of bristles or bristle rollers, by means of which the contaminated outer surface is mechanically cleaned at the same time.
  • Another principle is based on spraying the cleaning liquid onto the outer surface of the cylinder, the cleaning liquid being conveyed by its own pressure or by the pressure of a gaseous carrier medium.
  • the principle of spraying is widespread because, in contrast to the touching application devices, the spraying device does not come into contact with the dirt and is also easy to switch. The duration and energy of the beam are easy to set.
  • the disadvantage of spraying is that the surface to be cleaned moved under the jet is sometimes not wetted as well as is possible with wiping devices.
  • there are rebound effects and decompression effects of the washing liquid as a result of which parts of the liquid quantity provided for cleaning the cylinder jacket surface are lost.
  • the incorrect quantities of liquid, which do not moisten the cylinder reach undesired places on the printing press and sometimes cause undesirable effects such as corrosion or printing material malfunctions. Unwetted wetting liquid collects on the side of moistened areas, which forms drops that can get onto the substrate.
  • the waste of cleaning liquid is also unavoidable for kinematic reasons, because the movement and the forces of the liquid jet with respect to the rotating cylinder do not result in a perfect transition of the liquid into a wetting film. Drops hitting the surface of the cylinder bounce off at various angles.
  • the object of the invention is to keep the loss of cleaning liquid as low as possible and to make the transfer of the liquid more effective when blasting onto the cylinder surface.
  • the decompression of the cleaning liquid escaping under pressure and the disordered distribution are contained by at least parts of the transmission path being closed by a chamber-like structure.
  • the shielding of the transmission space between the jet device and the outer surface of the cylinder influences the pressure profile, which extends from the point of the still existing internal pressure in the line at the outflow opening to the point near the rotating outer surface.
  • the flow pressure is influenced.
  • the surrounding area and the moving surface of the cylinder is designed with a labyrinth seal, through which the flow energy is reduced to the rest.
  • the pressure of the cleaning fluid under pressure is released in the case of a distribution device which is spaced parallel and extends to the cylinder jacket surface by means of a first rear gap and a second front gap in the direction of rotation of the cylinder.
  • a larger amount flows out in the direction of rotation of the cylinder, because there is a suction effect in this direction, especially when the cylinder has a greater peripheral speed.
  • the labyrinth in question is laid out longer on this side. If the labyrinths have the same mechanical design, the front labyrinth element in the direction of rotation is longer than the rear labyrinth element.
  • wetting cleaning liquid that collects on the surfaces of the labyrinth can, so that it does not run off at the end of the application phase or dripping, can be removed by deliberate draining.
  • the distribution device and the guide elements are tilted and the amount flowing off is fed to a sump.
  • the guide elements consist of a covering bridging the space between the distributor device and the cylinder, with a front and rear chamber wall seen in the direction of rotation.
  • a screen mesh can be arranged on the free, non-contacting edges of the cladding opposite the cylinder jacket, which separates the mist droplets and is a "flow baffle".
  • a labyrinth design with axially running grooves, grooves next to projections or edges is more complex, but better. There is a changing pressure profile from the lead to the groove or from mountain to valley. Less liquid remains on the labyrinth walls than in the mesh. Additional insulation is achieved by double-walled construction of the labyrinth elements with openings or holes in the interior of the double wall. This creates a further escape route for the liquid, the mist and the liquid pressure.
  • the distribution device with its attached labyrinth elements for the controlled drainage of residual liquid, provision can be made to move the distribution devices between the working position and a rest position.
  • the labyrinth elements or the entire application device can be designed so that they can swivel in the rest position in a small space.
  • a distributor 2 extending parallel to the axis is arranged.
  • the distributor 2 has outlet openings 3, through which the entire width of the cylinder 1 can be acted upon by cleaning liquid.
  • the outlet openings 3 exist as a number of holes or as an elongated slot.
  • the outlet openings 3 can be provided with locking needles or locking covers which can be controlled mechanically or electronically.
  • the cylinder 1 rotates in the direction of rotation Z, in which the cleaning liquid applied to its outer surface is also transported.
  • the direction Z runs a flow caused by the moving lateral surface of the cylinder 1, which reaches a certain thickness depending on the viscosity of the surrounding medium, here ambient air with spray mist and solvent vapor.
  • the distributor 2 is designed as a tube. This tube 2 is received in a U-shaped chamber housing 5.
  • the chamber housing 5 is fastened to the side walls of the printing press by an adjustable holder 4.
  • the opening of the chamber housing 5 points radially to the cylinder 1 or is inclined such that the direction of flow of the emerging cleaning liquid is partly tangential in the direction of rotation Z.
  • the gap 7.1 between the rear wall 6.1 and the cylinder 1 is narrow.
  • the chamber housing 5 When the chamber housing 5 is positioned obliquely in the direction of rotation Z, it is the covering one Front wall 6.2 longer due to the geometric condition.
  • the amount of cleaning liquid sprayed from the outlet openings 3 mainly takes the path through the front flow gap 7.2, apart from the amount of mist which is deposited in the chamber housing 5.
  • a mesh 8 To reduce the amount of mist at the front flow gap 7.2, it is possible to attach a mesh 8 to form a partially open, lossy outlet cross section at the front flow gap 7.2. The fog or the drops are forced to escape through the many staggered free cross sections.
  • the function of the mesh 8 together with the front wall 6.2 of the chamber housing 5 is replaced in the embodiment of FIG. 2 by a front labyrinth element 9.2.
  • the front labyrinth element 9.2 viewed in the direction of rotation Z, closes tightly at the distributor 2 and in turn forms a flow labyrinth for the front flow gap 7.2. Seen tangentially, it is formed to be wavy or angular, so that narrow and wide gap cross sections are alternately formed on axially extending projections 10 and grooves 11.
  • the cleaning liquid emerging from the distributor 2 wets the outer surface of the cylinder 1, it also partially wets the front labyrinth element 9.2, and the flowing part passes through the flow labyrinth with an alternating pressure profile, with the alternating narrow or wide labyrinth cross sections alternating between relatively lower and higher pressures.
  • a rear labyrinth element 9.1 Seen against the direction of rotation Z, a rear labyrinth element 9.1 is also flanged onto the distributor 2.
  • the rear labyrinth element 9.1 performs the same function as the front labyrinth element 9.2, with the difference that the subset of the cleaning fluid escaping from the distributor 2 that is escaping to the rear is smaller. As a result, the flow insulation to be performed is to be formed in the form of a shorter rear labyrinth element 9.1.
  • the lossy flow path runs through the breakthroughs 13 into the interior and further out again, with emerging portions of cleaning fluid on the outer wall of the encapsulating Walls 12.1; 12.2 are to be collected and derived.
  • the experience values determine the distance between the openings 13 and the distributor 2 and the diameter with which they are to be installed.
  • the advantage of a double-walled construction is that blocking or additional media can be introduced into the capsules with forwarding through the openings. Vacuum can also be applied to the capsule, so that excess mist can be extracted. This complex measure is advantageous if the formation of fog mainly occurs only in short phases.
  • the increased entry of cleaning fluid into the channel 17 can be prevented if an order bar 15 can be lifted by a correspondingly synchronized movement of a control cam 16, which can be formed by a cam or a cam shoulder. With the lifting of the order bar 15, the flow labyrinth or its flow gap 7.1 and 7.2 is expanded on one side.
  • the spray jet 20 of the distributor 2 is preferably controlled automatically by the printing press.
  • the time, the amount of liquid, the spray direction and / or the area of impact of the spray jet 20 on the cylinder 1 can be controlled.
  • the device enables the cleaning liquid to be sprayed onto the cylinder in a specific time distribution and in a specific local quantity distribution or to be sprayed in the form of a sharp jet.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP92121224A 1992-02-28 1992-12-12 Dispositif à nettoyer d'un cylindre d'une rotative d'impression Expired - Lifetime EP0557607B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4206181A DE4206181A1 (de) 1992-02-28 1992-02-28 Vorrichtung zur aufbringung von reinigungsfluessigkeit auf einen zylinder einer rotationsdruckmaschine
DE4206181 1992-02-28

Publications (2)

Publication Number Publication Date
EP0557607A1 true EP0557607A1 (fr) 1993-09-01
EP0557607B1 EP0557607B1 (fr) 1996-03-06

Family

ID=6452814

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92121224A Expired - Lifetime EP0557607B1 (fr) 1992-02-28 1992-12-12 Dispositif à nettoyer d'un cylindre d'une rotative d'impression

Country Status (3)

Country Link
US (1) US5385095A (fr)
EP (1) EP0557607B1 (fr)
DE (2) DE4206181A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013003090A1 (de) * 2013-02-25 2014-08-28 Texmag Gmbh Vertriebsgesellschaft Verfahren und Vorrichtung zum Prüfen von Faltzuschnitten

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5575211A (en) * 1994-10-28 1996-11-19 Hycorr Machine Corporation Washing Arrangement for rotary printer
DE19520551A1 (de) * 1995-06-06 1996-12-12 Roland Man Druckmasch Verfahren und Vorrichtung zum Reinigen eines Zylinders einer Rotations-Druckmaschine
DE19526574C1 (de) * 1995-07-20 1996-10-17 Roland Man Druckmasch Verfahren und Vorrichtung zum Waschen eines Formzylinders und einer zugeordneten Auftragwalze in einer Druckmaschine
GB9908858D0 (en) * 1998-09-02 1999-06-16 Edy Clinton W G Disposable liner with intergrated fastening system as part of the wash up blade
DE10101835A1 (de) * 2001-01-17 2002-07-18 Koenig & Bauer Ag Verfahren zum Reinigen der Oberfläche eines Zylinders
DE10255799A1 (de) * 2002-11-28 2004-06-17 Man Roland Druckmaschinen Ag Verfahren und Vorrichtung zum Waschen eines Gummituches
DE102009043033A1 (de) * 2008-12-03 2010-06-10 Sms Siemag Ag Vorrichtung und Verfahren zur Reinigung von Rollen und/oder Walzen in Gießanlagen, Walzwerken oder Bandprozesslinien
DE102013004798A1 (de) * 2012-04-19 2013-10-24 Heidelberger Druckmaschinen Ag Druckwerk mit einer Strahl- oder Sprüheinrichtung für eine Reinigungsflüssigkeit

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3084626A (en) * 1961-01-06 1963-04-09 Anton R Stobb Apparatus for method for wiping a printing cylinder
DE3446757A1 (de) * 1984-11-17 1986-05-22 J.M. Voith Gmbh, 7920 Heidenheim Streicheinrichtung
EP0422400A2 (fr) * 1989-10-10 1991-04-17 Rockwell International Corporation Rouleau de mouillage dans une presse

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1378278A (en) * 1921-05-17 Machine
DE1240885B (de) * 1963-07-15 1967-05-24 Johannisberg G M B H Maschf Vorrichtung zum Ausstreichen sowie zum Abbuersten und Absaugen des Staubes von der Oberflaeche des zu bedruckenden Papiers an Bogendruckmaschinen, insbesondere Hochdruck-flachformmaschinen
CH463544A (de) * 1963-12-06 1968-10-15 Giori Gualtiero Reinigungsvorrichtung für Wischzylinder in Ein- oder Mehrfarbenstahlstichdruckmaschinen
DE1996060U (de) * 1968-07-12 1968-11-07 Tech Buero Wolf Lau Einrichtung zum feuchten von druckplatten einer offsetdruckmaschine
US3762950A (en) * 1971-11-22 1973-10-02 Xerox Corp Cleaning of particles from a surface
JPS5616424B2 (fr) * 1973-06-15 1981-04-16
JPH0739174B2 (ja) * 1986-06-26 1995-05-01 大日本印刷株式会社 活版輪転印刷機の版洗浄装置
US5086701A (en) * 1988-11-17 1992-02-11 Baldwin Technology Corp. Printing press blanket cleaner
AT393246B (de) * 1989-03-31 1991-09-10 Hwb Maschinenbau Auftragsvorrichtung zum aufbringen fliessfaehiger medien auf ebene flaechen, bahnen, walzen od. dgl.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3084626A (en) * 1961-01-06 1963-04-09 Anton R Stobb Apparatus for method for wiping a printing cylinder
DE3446757A1 (de) * 1984-11-17 1986-05-22 J.M. Voith Gmbh, 7920 Heidenheim Streicheinrichtung
EP0422400A2 (fr) * 1989-10-10 1991-04-17 Rockwell International Corporation Rouleau de mouillage dans une presse

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013003090A1 (de) * 2013-02-25 2014-08-28 Texmag Gmbh Vertriebsgesellschaft Verfahren und Vorrichtung zum Prüfen von Faltzuschnitten
US9435780B2 (en) 2013-02-25 2016-09-06 Texmag Gmbh Vertriebsgesellschaft Method and device for testing box blanks

Also Published As

Publication number Publication date
EP0557607B1 (fr) 1996-03-06
DE4206181A1 (de) 1993-09-02
DE59205603D1 (de) 1996-04-11
US5385095A (en) 1995-01-31

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