EP0548500A1 - Dispositif pour le nettoyage des cylindres d'une machine d'impression rotative - Google Patents

Dispositif pour le nettoyage des cylindres d'une machine d'impression rotative Download PDF

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Publication number
EP0548500A1
EP0548500A1 EP92118317A EP92118317A EP0548500A1 EP 0548500 A1 EP0548500 A1 EP 0548500A1 EP 92118317 A EP92118317 A EP 92118317A EP 92118317 A EP92118317 A EP 92118317A EP 0548500 A1 EP0548500 A1 EP 0548500A1
Authority
EP
European Patent Office
Prior art keywords
cloth
pressure
cleaning
cylinder
drive
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
EP92118317A
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German (de)
English (en)
Other versions
EP0548500B1 (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 EP0548500A1 publication Critical patent/EP0548500A1/fr
Application granted granted Critical
Publication of EP0548500B1 publication Critical patent/EP0548500B1/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
    • 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
    • B41P2235/20—Wiping devices
    • B41P2235/24—Wiping devices using rolls of cleaning cloth
    • B41P2235/246—Pressing the cleaning cloth against the cylinder

Definitions

  • the innovation relates to a device for cleaning cylinders of a rotary printing press according to the generic features specified in the protection claim.
  • Such a design is known in cleaning devices in which a cleaning cloth is used to hold the dirt adhering to the respective cylinder.
  • the cloth is brought into contact with the surface of the cylinder with an adjusting body, the force exerted to generate a frictional force being generated by an activatable drive.
  • the contact force must result in the required surface pressure at which a satisfactory cleaning result is achieved.
  • the cleaning effect is based on softening or dissolving the adhering dirt particles from paint residues and paper dust with the help of solvents with simultaneous abrasion of the particles.
  • Dirt and solvent are removed by the cleaning cloth used, which is pressed against the cylinder in the axially extending contact zone.
  • the absorption capacity of dirt is limited by the structure of the cloth. That is why new, clean strips are periodically fed into the cleaning zone.
  • a cloth feeder winds the cloth from a supply roll onto a dirt roll. With the dirt roller, the dirt absorbed by the cloth can be found as a wrapped layer. As long as a strip of the cleaning cloth is pressed, the rubbed off dirt collects and accumulates.
  • the task is to improve the handling of the dirt jam in the gap between the cylinder to be cleaned and the employed dirt-absorbing part.
  • a contact pressure change is applied in quasi-continuous operation.
  • the contact pressure change is based on the drive of the dirt-receiving part. Does the pressure device run e.g. with a cam or crank drive back and forth, maximum and minimum contact pressures are created synchronously.
  • the relationship between the normal pressure force generated by the pressing device and the frictional force which is decisive for the cloth movement allows a coupling between the alternating application of the pressing force and the cloth movement.
  • a cloth under tension is preferably brought into a decreasing and increasing feed movement in accordance with increasing and decreasing contact pressure.
  • the pull to be applied to the cloth results in a constriction in the loaded zone of the cloth, which means that the width of the cloth in the cleaning zone is smaller than the unloaded nominal width of the cloth.
  • This constriction is countered by keeping the stretch of the cleaning cloth as short as possible.
  • a cloth clamping point is formed as close as possible to the cleaning strip of the cleaning cloth. The main tensile force is not introduced at the winding spindle, but at this clamping point. The clamping point which locks the cleaning cloth and moves with the cloth is reset outside the operating cycle of the cleaning device.
  • the clamping point of the cloth in the pull section on this side between the cleaning strip and winding roll can be supplemented by a parallel clamping point on the other side between the cloth processing, supply roll and cleaning strip.
  • the first and the second clamping point are steered together. They form a tenter frame enclosing the cleaning strip.
  • This intermediate layer which can be made from a film of low-friction material, can either firmly cover the sliding surface of the cloth on the side of the pressure element or can be moved by appropriate fastening at the clamping points mentioned.
  • the advantage here is that there is no friction and scraping effect between the cleaning cloth and the pressure element.
  • the underlying process for cleaning cylinders of a rotary printing press is as follows: the cloth extending across a contact zone on a cylinder is pressed, the cloth is pulled through the contact zone, the contact pressure is applied alternately, the cloth movement is coupled with the changing contact pressure, so that increasing / decreasing lengths of cloth are moved through the pressure zone.
  • the radial movement applied to the pressure element or the cyclically applied pressure is coupled with the change course of the cloth movement.
  • the cloth is moved under the influence of the variable value of the friction.
  • the claimed unwinding length of the blanket in the pressure zone is made as short as possible by intermediate clamping.
  • the innovation offers several advantages, with improved dirt removal, more even use of the cleaning cloth with more even loading of the cloth with dirt, lower rubber blanket load with the resulting longer service life of the rubber blanket, lower amounts of in the channel or in the pit of the cylinder accumulated dirt can be achieved.
  • a cleaning device 3 is arranged, which is used for cleaning the outer surface of the cylinder 1 from time to time.
  • the cylinder 1 covered with a rubber blanket has a tensioning channel 2 which has dirt-absorbing edges even when a filler is used.
  • the cleaning device 3 consists of an adjusting body 5, in front of which a cleaning cloth 4 runs opposite the cylinder 1, the handling of which from a supply roll 7 to a winding roll 6 is ensured by a cloth drive 8.
  • the adjusting element 5 provided with a pressure element 9 moves from a rest position H into the engagement position E pressing the cloth 4 against the cylinder 1.
  • the contact with the engagement position E, which presupposes the cloth 4 takes place under the effect of variable contact pressure or variable, pressing normal force N, on which the friction force R depends.
  • the development of the cloth 4 and the direction of rotation of the cylinder 1 are preferably in opposite directions. Coincidence is also possible.
  • the in the inlet gap 10 between the cylinder 1 and the cloth 4 collecting dirt tries to escape through the pressure gap. When the tensioning channel 2 runs past, a partial relaxation occurs, so that the dirt penetrates into the depression provided.
  • the amount of dirt sitting in the inlet gap 10 is limited when a part of it is removed via the cloth 4 in the intended direction of development of the cloth 4. If the engagement position E is moved from E 'to the "softer" positions E' ', E' '', the fabric unwinding changes to an increasing feed rate w.
  • Figure 2 shows the relationship between the cloth feed w and the frictional force R (N), the frictional force R representing the total surface pressure.
  • characteristic curves w (R) set up that are constant or hyperbolic as shown in dashed lines.)
  • the adjusting body 5 is coupled to a cam drive or to a crank drive which acts on the back and forth movement. During the periodic rotary movement of the cam or crank operation, the surface pressure of the cloth 4 changes from minimal to maximum.
  • the cleaning device 3 In the case of a construction of the cleaning device 3 as a cleaning bar with an elastic pressure element 9, which is brought into the rest position H by pressure or by inflow into the engagement position E, correspondingly by relaxation or outflow of the fluid, there is a line system for supplying the fluid.
  • To achieve changing internal pressure in the pressure element 9 is supplied with a constant pre-pressure.
  • the interior of the pressure element 9 is connected to an overpressure valve 12 which is adjustable in terms of the release value and the opening characteristic. Inflow of the fluid with increasing pressure on the cloth 4, opening of the pressure relief valve 12 with accompanying relaxation of the internal pressure, again closing of the pressure relief valve 12 with renewed pressure build-up change with one another.
  • a buffer 13 can be set up which alternately feeds and reduces the pressure due to its volume change.
  • the closed, corresponding volume connecting the buffer volume and the interior of the pressure element 9 is provided with a fluid supply.
  • the consumption of e.g. However, compressed air is low compared to the structure that works with a leak through the pressure relief valve 12.
  • a two-way valve 16 can be placed in the supply line 14, through the rotation of which compressed air flows periodically and flows out of the interior of the pressure element 9 via the vent 15.
  • the cloth winder with the take-up reel 6 applies the tension necessary for the movement of the cloth 4 in a spaced-apart position and in a pressed-against position against the cylinder 1 against the frictional force R.
  • the winding spindle 17 is connected on both sides to electric motors driving via worm drives 18. Electric motors as 4-wire asynchronous motors or as DC shunt motors have a relatively small size and are suitable for space-saving installation of the cloth drive 8.
  • the planned movement of the cloth 4 is in the peeling direction, counter to the direction of rotation of the cylinder 1.
  • the cloth 4 is thus automatically tightened against the pull caused by the cloth drive 8.
  • the supply roll 7 is provided with an adjustable friction brake, as indicated in FIG.
  • the rotational movement of the electric motors, ie the cloth drive 8, can be controlled in terms of torque and speed by means of a pressure sensor attached to the pressure element 9, so that the characteristic curves according to FIG. 2 can be fulfilled.
  • the torque of a small amount with the spaced position of the pressure element 9 changes to high torque with strong pressure.
  • a torsion bar 19 is provided inside the winding roller 6.
  • the principle of the torsion drive shows a firm clamping of the torsion bar 19 within the take-up reel 6 and a rotatable bearing provided with an actuating lever 20 on the other side of the torsion bar 19.
  • a cloth drive 8 designed as a linear servo drive 8.1 acts on the actuating lever 20.
  • the clamping point of the actuating lever 20 on the torsion bar 19 runs for moving the actuating lever 20 relative to the winding roller 6 to be rotated via a freewheel or ratchet drive with a pawl.
  • the torsion bar 19 is prestressed, the take-up roll 6 remains in a manner suitable for processing.
  • the take-up roll 6 is released by means of a clutch or a ratchet wheel 20.1, with which the take-up roll 6 moves in the biasing direction of the torsion bar 19 until it is again locked by means of the clutch 21.
  • the torsion drive has the advantage of simple mechanical construction and simple operation.
  • a two-sided pawl for the clutch 20.1 - two-sided in such a way that a locking element is disengaged and disengaged as in the unrest of a watch - very small feed cycles of the cloth 4 can be achieved.
  • the spring element in the form of the torsion bar 19 can also by another spring element, for. B. can be replaced or supplemented by a linear spring between the servo drive 8.1 and the actuating lever 20.
  • the servo drive 8.1 transmits the servomotor movement directly to the take-up reel 6 in short, fast cycles (FIG. 4b).
  • the introduction of the tensile force for the cloth feed on the winding spindle 17 is relatively indirect because of the winding positions of the cloth 4, because the piece of cloth 4 that is actually to be advanced is limited only to the section in front of the pressing element 9.
  • a cloth tractor 21 formed from a barbed loop.
  • the driven barbed endless loop only captures the relevant section of the cloth 4 in the area of the pressure element 9.
  • FIG. 1 Another construction with restriction of the loading zone essentially to the pressed-on section of the cloth 4 consists of a tensioning frame 22 which extends in a window shape in front of the pressure element 9.
  • the tensioning frame 22 shows, seen in the direction of development of the cloth 4, a clamping strip 23 a upstream of the pressing element 9 and a clamping strip 23 b downstream of the pressing element 9.
  • the terminal strips 23 a; 23 b form clamping points for a clamping section T extending therebetween.
  • the cloth 4 moves from the beginning of the clamping section T to the end of the clamping section T.
  • the movement of the tensioning frame 22 takes place either linearly, specifically tangentially to the pressure element 9, or by means of a pivoting movement which relates to a pivoting of the tensioning frame 22 over an angular range.
  • the displacement of the tensioning frame 22 towards the supply roll 7 is coupled with a loosening of the clamping points 23 a; 23 b in an automatic manner based on the belt buckle principle. If the cloth 4 is pulled, the clamping is reinforced automatically by a clamping wedge or by stronger, higher friction wrap. When the tension on the cloth 4 subsides, the clamping connection loosens and the tensioning frame 22 can be moved back relative to the cloth stretch held between the winding roll 6 and the supply roll 7.
  • the essential fabric feed forces are applied by the tenter frame 22.
  • the power of the drive for the tenter frame 22 is decisive for overcoming the frictional forces prevailing when the cloth 4 is pressed on.
  • the drive power is therefore essential in the design of the characteristic curves according to FIG. 2. If the drive power is low, the cloth 4 can only be moved when contact with the cylinder 1 decreases. With high drive power, the feed movement of the cloth 4 is possible without hindrance even with strong pressure, strong contact with overcoming the frictional force R.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP92118317A 1991-12-20 1992-10-27 Dispositif pour le nettoyage des cylindres d'une machine d'impression rotative Expired - Lifetime EP0548500B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4142422 1991-12-20
DE4142422A DE4142422A1 (de) 1991-12-20 1991-12-20 Vorrichtung zum reinigen von zylindern einer rotationsdruckmaschine

Publications (2)

Publication Number Publication Date
EP0548500A1 true EP0548500A1 (fr) 1993-06-30
EP0548500B1 EP0548500B1 (fr) 1996-01-03

Family

ID=6447782

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92118317A Expired - Lifetime EP0548500B1 (fr) 1991-12-20 1992-10-27 Dispositif pour le nettoyage des cylindres d'une machine d'impression rotative

Country Status (3)

Country Link
US (1) US5373789A (fr)
EP (1) EP0548500B1 (fr)
DE (3) DE4142422A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0715955A1 (fr) 1994-12-06 1996-06-12 MAN Roland Druckmaschinen AG Procédé et appareil à nettoyer un cylindre d'une machine d'impression
EP0860278A2 (fr) * 1997-02-19 1998-08-26 Baldwin-Japan Ltd. Dispositif pour le nettoyage de cylindres imprimeurs

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4306676C2 (de) * 1993-03-04 1998-03-19 Heidelberger Druckmasch Ag Wascheinrichtung für Zylinder einer Druckmaschine
FR2718996B1 (fr) * 1994-04-26 1997-07-04 Heidelberger Druckmasch Ag Procédé de lavage de l'enveloppe d'un cylindre d'une machine rotative à imprimer.
US5611281A (en) * 1995-05-08 1997-03-18 Serater Llc System for cleaning particles from a surface
DE19605957A1 (de) * 1996-02-17 1997-08-21 Heidelberger Druckmasch Ag Vorrichtung zum Reinigen der Mantelfläche von Zylindern in Rotationsdruckmaschinen
DE19920230A1 (de) * 1999-05-03 2000-11-09 Baldwin Grafotec Gmbh Reinigungsvorrichtung für die graphische Industrie
DE19920231A1 (de) * 1999-05-03 2000-11-09 Baldwin Grafotec Gmbh Reinigungsvorrichtung für die graphische Industrie
SE9901729L (sv) * 1999-05-12 2000-11-13 Jimek Ab Duktvättanordning
DE19936259B4 (de) * 1999-07-31 2006-04-13 Koenig & Bauer Ag Einrichtung zum Verhindern von Verschmutzungen
DE10056026A1 (de) * 2000-11-11 2002-05-16 Baldwin Grafotec Gmbh Druckmaschinenzylinder-Waschvorrichtung und - Waschverfahren
DE10217462A1 (de) * 2002-04-19 2003-11-06 Baldwin Germany Gmbh Reinigungsvorrichtung für Offset-Druckmaschinen
DE10342496B4 (de) * 2003-05-14 2005-10-13 Koenig & Bauer Ag Vorrichtung zum Reinigen eines Zylinders oder einer Walze einer Druckmaschine
JP2006528567A (ja) * 2003-05-14 2006-12-21 カーベーアー−ジオリ ソシエテ アノニム 印刷機のシリンダまたはローラーを清掃するための装置及び方法
DE102004033218B4 (de) * 2003-08-27 2015-07-02 Heidelberger Druckmaschinen Ag Verfahren zur Zylinderreinigung in einer Druckmaschine
DE102007017810B4 (de) * 2007-04-16 2010-08-12 Technotrans Ag Waschvorrichtung für breite Druckmaschinen
US8590449B2 (en) * 2009-06-11 2013-11-26 Ronald G. Egan Dry flexographic printing plate cleaner system and method
US9421757B2 (en) 2014-10-23 2016-08-23 Ronald G. Egan Method and apparatus for cleaning printing presses for three dimensional objects

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2047167A (en) * 1979-04-19 1980-11-26 Baldwin Gegenheimer Corp Blanket cylinder cleaner

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE712165C (de) * 1938-02-24 1941-10-14 Thomas Nissen Vorrichtung zum Reinigen des UEbertragungszylinders von nach dem Rotationsoffsetverfahren arbeitenden Buerodruckmaschinen
DE2052996A1 (en) * 1969-10-28 1972-05-04 Lawrence, Arthur Richard, 8000 München Cleaning off-set printing cloths - using grease-impregnated paper or fabric
US4757763A (en) * 1979-04-19 1988-07-19 Baldwin Technology Corporation Automatic blanket cylinder cleaner
DD227927A1 (de) * 1984-11-02 1985-10-02 Polygraph Leipzig Vorrichtung zur reinigung eines zylinders einer druckmaschine
JPS6416657A (en) * 1987-07-10 1989-01-20 Baldwin Nippon Kk Pressure pad in cylinder cleaner for press
DE3909119C2 (de) * 1989-03-20 1997-01-23 Heidelberger Druckmasch Ag Wascheinrichtung für eine Druckmaschine
DE4008159A1 (de) * 1990-03-15 1991-09-19 Heidelberger Druckmasch Ag Reinigungseinrichtung fuer eine druckmaschine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2047167A (en) * 1979-04-19 1980-11-26 Baldwin Gegenheimer Corp Blanket cylinder cleaner

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0715955A1 (fr) 1994-12-06 1996-06-12 MAN Roland Druckmaschinen AG Procédé et appareil à nettoyer un cylindre d'une machine d'impression
DE4443356A1 (de) * 1994-12-06 1996-06-13 Roland Man Druckmasch Verfahren und Anordnung zur Reinigung eines Zylinders einer Rotationsdruckmaschine
US5753048A (en) * 1994-12-06 1998-05-19 Man Roland Druckmaschinen Ag Method and apparatus for cleaning a cylinder of a rotary printing machine
DE4443356C2 (de) * 1994-12-06 1998-07-02 Roland Man Druckmasch Verfahren zur Reinigung eines Zylinders einer Rotationsdruckmaschine
US6070530A (en) * 1994-12-06 2000-06-06 Man Roland Druckmaschinen Ag Method and apparatus for cleaning a cylinder of a rotary printing machine
EP0860278A2 (fr) * 1997-02-19 1998-08-26 Baldwin-Japan Ltd. Dispositif pour le nettoyage de cylindres imprimeurs
EP0860278A3 (fr) * 1997-02-19 1999-03-03 Baldwin-Japan Ltd. Dispositif pour le nettoyage de cylindres imprimeurs
US6101943A (en) * 1997-02-19 2000-08-15 Baldwin-Japan, Ltd. Cylinder cleaning device and cleaning method

Also Published As

Publication number Publication date
DE59204927D1 (de) 1996-02-15
US5373789A (en) 1994-12-20
EP0548500B1 (fr) 1996-01-03
DE4142422A1 (de) 1993-06-24
DE9216307U1 (de) 1993-04-08

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