EP0291841A2 - Device for cooling a paper web - Google Patents

Device for cooling a paper web Download PDF

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Publication number
EP0291841A2
EP0291841A2 EP88107570A EP88107570A EP0291841A2 EP 0291841 A2 EP0291841 A2 EP 0291841A2 EP 88107570 A EP88107570 A EP 88107570A EP 88107570 A EP88107570 A EP 88107570A EP 0291841 A2 EP0291841 A2 EP 0291841A2
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EP
European Patent Office
Prior art keywords
cooling
stripping
dryer
cloth
roller
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
EP88107570A
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German (de)
French (fr)
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EP0291841B1 (en
EP0291841A3 (en
Inventor
Franz Waizmann
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Baldwin Gegenheimer GmbH
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Baldwin Gegenheimer GmbH
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Application filed by Baldwin Gegenheimer GmbH filed Critical Baldwin Gegenheimer GmbH
Priority to AT88107570T priority Critical patent/ATE54610T1/en
Publication of EP0291841A2 publication Critical patent/EP0291841A2/en
Publication of EP0291841A3 publication Critical patent/EP0291841A3/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/0476—Cooling
    • B41F23/0479—Cooling using chill rolls

Definitions

  • the invention relates to a device for cooling oil-containing, preferably web-like material, with at least one cooling roller, which is preferably arranged downstream of a dryer, in particular a web-fed rotary printing machine with a downstream dryer and this cooling device.
  • Freshly printed paper contains oil, among other things, since the usual printing inks, especially in the form of offset printing inks, contain oil. This oil is intended to evaporate, but this requires a certain period of time at a given temperature. However, the time available shortens with increasing throughput speed. Experience has shown that in modern web-fed rotary printing presses with a downstream dryer, only a part of the oil evaporates inside the dryer due to the high web speed, so that there is a precipitate of oil which has not yet evaporated when leaving the dryer on the cooling rollers of the cooling device which has been subsequently decoded is coming. In particular, the cooling rollers on the inlet side are at risk in this regard.
  • a scraper device can be set at least on the inlet-side cooling roller.
  • the assigned cooling roller is permanently cleaned by means of this stripping device. A possible oil deposit is therefore removed immediately and made harmless.
  • the measures according to the invention therefore advantageously enable a high production speed with a high level of production reliability and thus give a high level of economy overall.
  • a wiping device can expediently be assigned to each of the two inlet-side cooling rolls. In this way, a particularly high cleaning effect and thus a particularly high level of safety are achieved.
  • the cooling rollers arranged downstream of the two inlet-side cooling rollers do not require a stripping device, since these cooling rollers are not endangered with regard to oil precipitation.
  • the stripping device can have a rubber squeegee which can preferably be driven in an oscillating manner and which lies against the circumference of the respectively assigned cooling roller. This design ensures extremely long maintenance intervals and therefore proves to be very maintenance friendly.
  • the stripping device has a cloth that can be unwound from a supply roll and that can be wound onto a storage roll and that is guided over a pressing element that lies against the circumference of the respectively assigned cooling roller.
  • the cloth used here not only wipes the oil from the circumference of the assigned cooling roller, but is also able to take up and remove this oil. There is no need to divert the oil in any other way.
  • the roller releasing or receiving the roller is gradually moved, so that on the one hand the lowest possible consumption of tissue is guaranteed, and on the other hand overloading of the tissue with absorbed oil can be prevented.
  • the device on which FIG. 1 is based for the production of printed products from a printed paper web 1 consists, in a manner known per se, of a web-fed rotary printing press 2, here in the form of a web-fed rotary offset printing press, for printing on the web 1, a dryer which has been passed through by the web 1 following the printing 3, a cooling unit 4 arranged downstream of the dryer 3 and a folder 5 which then divides the paper web 1 and further processes the sections accordingly.
  • the cooling unit 4 has four cooling rollers 6 which are wrapped in succession by the paper web 1 and which are accommodated on the two opposite side walls 7 of the cooling unit 4 are.
  • the structure and the mode of operation of a device of the present type are known per se and therefore do not require any further explanation.
  • the offset printing ink printed on the paper web 1 contains oil. Evaporation of oil takes place in the area of the dryer 3. However, given the web speed and compact dryer design in the case of modern printing presses, the residence time of the paper web 1 in the dryer 3 is not sufficient to evaporate all of the oil. The oil which has not yet evaporated when leaving the dryer 3 therefore hits the cooling rollers 6 of the cooling unit 4 down. In particular, the two inlet-side, here upper cooling rollers 6 are at risk in this regard. In order to avoid oil stains on the paper web 1 and web breaks due to a so-called floating of the paper web 1 on the cooling rollers 6, the upper cooling rollers 6, which are at risk of being contaminated with oil, are permanently stripped off and thus cleaned. For this purpose, as can best be seen from FIG. 2, there are provided stripping devices 8 assigned to the upper cooling rollers 6, which can be accommodated on the side walls 7 of the cooling unit 4 and which, with a corresponding stripping element, are permanently in contact with the circumference of the respectively assigned cooling roller 6.
  • a doctor device can be provided.
  • the squeegee device on which FIG. 3 is based consists of a squeegee sheet 10 received on an associated squeegee holder 9.
  • This is a comparatively thick squeegee sheet made of hard rubber or rubber-like material, which rests with a positive angle of attack on the circumference of the associated cooling roller 6.
  • the doctor blade holder receiving the doctor blade 10 is in turn mounted on the side walls 7 of the cooling unit 4. To form an oscillating movement of the doctor blade 10, the doctor holder 9 can be driven to oscillate.
  • the doctor blade holder 9 is pivotally arranged so that the doctor blade 10 can be pivoted away from the associated cooling roller 6.
  • the usage a rubber squeegee with a positive angle of attack ensures that the circumferential surface of the assigned cooling roller 6 is protected gently.
  • the oil stripped off by means of the squeegee blade 10 is drained off by means of a suitable drainage. In the exemplary embodiment shown, this oil drips off over the rear edge of the doctor blade 10 and is drained off through a channel 11 which slopes down this drip edge and which can also be fastened to the doctor holder 9.
  • the wiping device on which FIG. 4 is based works with a cloth 12 which can be pressed onto the circumference of the respectively assigned cooling roller 6 and which wipes off the oil and at the same time transports it away, so that additional drainage can be dispensed with.
  • the stripping device on which FIG. 4 is based consists of a pressure bar 13 which can be brought into contact with the circumference of the assigned cooling roller 6 and over which the cloth 12 is guided and which can be unwound from a supply roll 14 and wound onto a storage roll 15.
  • the cloth 12 is moved step by step at predetermined intervals, a new, unused strip of the cloth 12 coming into contact with the cooling roller 6 to be scraped at each step. Accordingly, the supply roll 14 and storage roll 15 can be driven intermittently step by step.
  • the diameter of the cloth winding present on the supply roll 14 is scanned by means of a button 16 which, when a minimum winding diameter is reached, triggers a signal which indicates the end of the cloth 12, so that a new cloth, that is to say new rolls, can be inserted. It can therefore not happen that the extent of the assigned cooling roller 6 is not stripped for a long time.
  • the cloth 12 comes into contact with the periphery of the assigned cooling roller 6 in the dry state. A cloth moistening device is therefore not necessary. Accordingly, the cloth 12 is a dry wipe z. B. made of cotton and / or suitable synthetic fiber.
  • the pressure bar 13 consists of a continuous rail 18 which is received on lateral holders 17 and which, in the region of its side facing the associated cooling roller 6, is encompassed by a cap 19 made of elastic material such as rubber or the like, over which the cloth 12 passes goes.
  • the longitudinal edges of the cap 19 can be secured by holding claws 20 fastened to the strip-shaped rail 18.
  • the areas of the cloth 12 running on or from the pressure bar 13 are guided over deflection brackets 21 and 22 in order to keep the cloth 12 away from the side flanks of the pressure bar 13 and to ensure easy movement of the cloth 12.
  • the deflection brackets 21 and 22 can simply be designed as sheets received on the holders 19.
  • the lateral bearing journals of the rollers 14 and 15 are received on side bearing plates 23.
  • This can be pivotally mounted on the side walls 7 of the associated cooling unit 4 by means of an axis 25.
  • the pressure position of the frame 24 on which FIG. 4 is based can be secured by means of a fixable holding device 26 which can be set for the purpose of readjustment.
  • the same also applies to the squeegee holder 9 of FIG. 3.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Lubricants (AREA)

Abstract

1. A device for web-printing having a dryer (3) following to a web-feed printing press (2) and a cooling device (4) following to the dryer (3) characterized in that a stripping device (8) is provided able to be brought in engagement of at least the cooling roll (6) arranged at the intake side of the cooling device (4) in order to increase the web-speed through the dryer.

Description

Die Erfindung betrifft eine Vorrichtung zu Kühlung von ölhaltigem, vorzugsweise bahnförmigem Material, mit wenigstens einer vorzugsweise einem Trockner nachgeord­neten Kühlwalze, insbesondere eine Rollenrotaitonsdruck­maschine mit nachgeordnetem Trockner und diesem nachge­ordneter Kühleinrichtung.The invention relates to a device for cooling oil-containing, preferably web-like material, with at least one cooling roller, which is preferably arranged downstream of a dryer, in particular a web-fed rotary printing machine with a downstream dryer and this cooling device.

Frisch bedrucktes Papier ist unter anderm ölhaltig, da die gängigen Druckfarben, insbesondere in Form der Offsetdruckfarben, ölhaltig sind. Dieses Öl soll ver­dampfen, was jedoch bei einer vorgegebenen Temperatur eine bestimmte Zeitspanne erforderlich macht. Die zur Verfügung stehende Zeit verkürzt sich jedoch mit zu­nehmender Durchsatzgeschwindigkeit. Die Erfahrung hat gezeigt, daß bei modernen Rollenrotationsdruckmaschinen mit nachgeordnetem Trockner infolge der hohen Bahnge­schwindigkeit nur noch ein Teil des Öls innerhalb des Trockners verdampft, so daß es zu einem Niederschlag von beim Verlassen des Trockners noch nicht verdampftem Öl auf den Kühlwalzen der dem Trockner nachgerodnetem Kühl­einrichtung kommt. Insbesondere die einlaufseitigen Kühl­walzen sind in dieser Hinsicht gefährdet. Im Laufe längerer Betriebszeiten kommt es dabei erfahrungsgemäß zu einem mehr oder weniger dicken Ölfilm auf diesen Kühl­walzen. Die Folge davon sind nicht nur Ölflecken auf dem Papier, sondern insbesondere ein sogenanntes Schwimmen der Papierbahn, was die Gefahr eines Reißens der Papier­bahn außerordentlich erhöht.Freshly printed paper contains oil, among other things, since the usual printing inks, especially in the form of offset printing inks, contain oil. This oil is intended to evaporate, but this requires a certain period of time at a given temperature. However, the time available shortens with increasing throughput speed. Experience has shown that in modern web-fed rotary printing presses with a downstream dryer, only a part of the oil evaporates inside the dryer due to the high web speed, so that there is a precipitate of oil which has not yet evaporated when leaving the dryer on the cooling rollers of the cooling device which has been subsequently decoded is coming. In particular, the cooling rollers on the inlet side are at risk in this regard. Experience has shown that over a longer period of time there is a more or less thick oil film on these cooling rollers. The result of this is not only oil stains on the paper, but in particular a so-called floating of the paper web, which increases the risk of tearing the paper web extremely.

Hiervon ausgehend ist es daher die Aufgabe der vorliegen­den Erfindung bei einer Vorrichtung eingangs erwähnter Art mit einfachen und kostengünstigen Mitteln eine Ver­schmutzung der Kühlwalzen mit Öl verhindern.Proceeding from this, it is therefore the object of the present invention to prevent contamination of the cooling rollers with oil in a device of the type mentioned at the beginning with simple and inexpensive means.

Diese Aufgabe wird erfindungsemäß dadurch gelöst, daß zumindest an die einlaufseitige Kühlwalze eine Abstreif­einrichtung anstellbar ist.This object is achieved according to the invention in that a scraper device can be set at least on the inlet-side cooling roller.

Mittels dieser Abstreifeinrichtung wird die zugeord­nete Kühlwalze permanent gereinigt. Ein eventueller Öl­niederschlag wird daher sofort entfernt und damit un­schädlich gemacht. Im Falle einer Rollenrotationsdruck­maschine mit nachgeordnetem Trockner und diesem nachge­ordneter Kühleinrichtung kann daher auch bei vergleichs­weise kompakter Trocknerbauweise in vorteilhafter Weise mit einer hohen Bahngeschwindigkeit gearbeitet werden, ohne daß sich dies ungünstig auf die Produktqualität und die Störungssicherheit auswirken könnte. Die erfindungs­gemäßen Maßnahmen ermöglichen daher in vorteilhafter Weise eine hohe Produktionsgeschwindigkeit bei hoher Produktionssicherheit und geben damit insgesamt eine hohe Wirtschaftlichkeit.The assigned cooling roller is permanently cleaned by means of this stripping device. A possible oil deposit is therefore removed immediately and made harmless. In the case of a web-fed rotary printing press with a downstream dryer and this downstream cooling device, it is therefore possible to work advantageously with a high web speed even with a comparatively compact dryer design, without this having an adverse effect on the product quality and the reliability. The measures according to the invention therefore advantageously enable a high production speed with a high level of production reliability and thus give a high level of economy overall.

Zweckmäßig kann im Falle einer Kühleinrichtung mit mehreren Kühlwalzen den beiden einlaufseitigen Kühlwal­zen jeweils eine Abstreifeinrichtung zugeordnet sein. Hierdurch werden ein besonders hoher Reinigungseffekt und damit eine besonders hohe Sicherheit erreicht. Die den beiden einlaufseitigen Kühlwalzen nachgeordneten Kühlwalzen kommen ohne Abstreifeinrichtung aus, da diese Kühlwalzen hinsichtlich eines Ölniederschlags nicht ge­fährdet sind.In the case of a cooling device with a plurality of cooling rolls, a wiping device can expediently be assigned to each of the two inlet-side cooling rolls. In this way, a particularly high cleaning effect and thus a particularly high level of safety are achieved. The cooling rollers arranged downstream of the two inlet-side cooling rollers do not require a stripping device, since these cooling rollers are not endangered with regard to oil precipitation.

Gemäß einer ersten vorteilhaften Ausgestaltung der über­geordneten Maßnahmen kann die Abstreifeinrichtung ein vorzugsweise changierend antreibbares, am Umfang der je­weils zugeordneten Kühlwalze anliegendes Gummirakel auf­weisen. Diese Bauweise gewährleistet äußerst lange War­tungsintervalle und erweist sich daher als sehr Wartungs­ freundlich.According to a first advantageous embodiment of the superordinate measures, the stripping device can have a rubber squeegee which can preferably be driven in an oscillating manner and which lies against the circumference of the respectively assigned cooling roller. This design ensures extremely long maintenance intervals and therefore proves to be very maintenance friendly.

Eine andere vorteilhafte Ausgestaltung der übergeord­neten Maßnahmen kann darin bestehen, daß die Abstreif­einrichtung ein von einer Vorratsrolle abwickelbares und auf eine Speicherrolle aufwickelbares Tuch aufweist, das über ein am Umfang der jeweils zugeordneten Kühlwalze an­liegendes Andrückorgan geführt ist. Das hier Verwendung findende Tuch streift das Öl vom Umfang der zugeordneten Kühlwalze nicht nur ab, sondern ist gleichzeitig in der Lage, dieses Öl aufzunehmen und abzutransportieren. Eine anderweitige Ableitung des Öls kann daher entfallen. Zweckmäßig werden dabei die das Tuch freigebende bzw. aufnehmende Rolle schrittweise bewegt, so daß einerseits ein möglichst geringer Tuchverbrauch gewährleistet ist, und andererseits eine Überladung des Tuchs mit aufge­nommenem Öl unterbunden werden kann.Another advantageous embodiment of the superordinate measures can consist in the fact that the stripping device has a cloth that can be unwound from a supply roll and that can be wound onto a storage roll and that is guided over a pressing element that lies against the circumference of the respectively assigned cooling roller. The cloth used here not only wipes the oil from the circumference of the assigned cooling roller, but is also able to take up and remove this oil. There is no need to divert the oil in any other way. Appropriately, the roller releasing or receiving the roller is gradually moved, so that on the one hand the lowest possible consumption of tissue is guaranteed, and on the other hand overloading of the tissue with absorbed oil can be prevented.

Weitere vorteilhafte Ausgestaltungen und zweckmäßige Fortbildungen der übergeordneten Maßnahmen ergeben sich aus der nachstehenden Beschreibung einiger Ausführungs­beispiele anhand der Zeichnung in Verbindung mit den restlichen Unteransprüchen.Further advantageous refinements and expedient further developments of the superordinate measures result from the following description of some exemplary embodiments with reference to the drawing in conjunction with the remaining subclaims.

In der Zeichnung zeigen:

  • Figur 1 Eine schematische Seitenansicht einer Vor­richtung zur Herstellung Druckprodukten teilweise im Schnitt,
  • Figur 2 eine vergrößerte Darstellung des Kühlaggre­gats der Anordnung gemäß Figur 1 mit den oberen Kühlwalzen zugeordneter Abstreifein­richtung,
  • Figur 3 ein Beispiel für eine mit einer Gummira­kel versehene Abstreifeinrichtung und
  • Figur 4 ein Beispiel für eine mit einem Abstreif­tuch arbeitende Abstreifeinrichtung.
The drawing shows:
  • FIG. 1 shows a schematic side view of a device for producing printed products, partly in section,
  • FIG. 2 shows an enlarged illustration of the cooling unit of the arrangement according to FIG. 1 with the stripping device assigned to the upper cooling rollers,
  • Figure 3 shows an example of a provided with a rubber doctor and
  • Figure 4 shows an example of a stripping device working with a stripping cloth.

Die der Figur 1 zugrundeliegende Vorrichtung zur Her­stellung von Druckprodukten aus einer bedruckten Papier­bahn 1 besteht in an sich bekannter Weise aus einer Rollenrotationsdruckmaschine 2, hier in Form einer Rollenrotationsoffsetdruckmaschine, zum Bedrucken der Papierbahn 1, einem im Anschluß an den Druck von der Pa­pierbahn 1 durchlaufenen Trockner 3, einem dem Trockner 3 nachgeordneten Kühlaggregat 4 sowie einem anschließend die Papierbahn 1 aufteilenden und die Abschnitte ent­sprechend weiterverarbeitenden Falzapparat 5. Das Kühl­aggregat 4 besitzt vier von der Papierbahn 1 nacheinan­der umschlungene Kühlwalzen 6, die auf den zwei einander gegenüberliegenden Seitenwänden 7 des Kühlaggregats 4 aufgenommen sind. Der Aufbau und die Wirkungsweise einer Vorrichtung hier vorliegender Art sind an sich bekannt und bedürfen daher keiner näheren Erläuterung.The device on which FIG. 1 is based for the production of printed products from a printed paper web 1 consists, in a manner known per se, of a web-fed rotary printing press 2, here in the form of a web-fed rotary offset printing press, for printing on the web 1, a dryer which has been passed through by the web 1 following the printing 3, a cooling unit 4 arranged downstream of the dryer 3 and a folder 5 which then divides the paper web 1 and further processes the sections accordingly. The cooling unit 4 has four cooling rollers 6 which are wrapped in succession by the paper web 1 and which are accommodated on the two opposite side walls 7 of the cooling unit 4 are. The structure and the mode of operation of a device of the present type are known per se and therefore do not require any further explanation.

Die auf die Papierbahn 1 aufgedruckte Offsetdruckfarbe ist ölhaltig. Im Bereich des Trockners 3 findet eine Ver­dampfung von Öl statt. Bei der im Falle moderner Druck­maschinen vorliegenden Bahngeschwindigkeit und kompakter Trocknerbauweise reicht die Verweilzeit der Papierbahn 1 im Trockner 3 jedoch nicht aus, um das gesamte Öl zu ver­dampfen. Das beim Verlassen des Trockners 3 noch nicht verdampfte Öl schlägt sich daher auf den Kühlwalzen 6 des Kühlaggregats 4 nieder. Insbesondere die beiden einlaufseitigen, hier oberen Kühlwalzen 6 sind in dieser Hinsicht gefährdet. Zur Vermeidung von Ölflecken auf der Papierbahn 1 und von Bahnrissen infolge eines sogenann­ten Schwimmens der Papierbahn 1 auf den Kühlwalzen 6 wer­den die bezüglich einer Verschmutzung mit Öl gefährdeten, oberen Kühlwalzen 6 permanent abgestreift und damit ge­reinigt. Hierzu sind, wie am besten aus Figur 2 erkenn­bar ist, den oberen Kühlwalzen 6 zugeordnete Abstreifein­richtungen 8 vorgesehen, die an den Seitenwänden 7 des Kühlaggregats 4 aufgenommen sein können und die mit ei­nem entsprechenden Abstreifelement permanent am Umfang der jeweils zugeordneten Kühlwalze 6 anliegen.The offset printing ink printed on the paper web 1 contains oil. Evaporation of oil takes place in the area of the dryer 3. However, given the web speed and compact dryer design in the case of modern printing presses, the residence time of the paper web 1 in the dryer 3 is not sufficient to evaporate all of the oil. The oil which has not yet evaporated when leaving the dryer 3 therefore hits the cooling rollers 6 of the cooling unit 4 down. In particular, the two inlet-side, here upper cooling rollers 6 are at risk in this regard. In order to avoid oil stains on the paper web 1 and web breaks due to a so-called floating of the paper web 1 on the cooling rollers 6, the upper cooling rollers 6, which are at risk of being contaminated with oil, are permanently stripped off and thus cleaned. For this purpose, as can best be seen from FIG. 2, there are provided stripping devices 8 assigned to the upper cooling rollers 6, which can be accommodated on the side walls 7 of the cooling unit 4 and which, with a corresponding stripping element, are permanently in contact with the circumference of the respectively assigned cooling roller 6.

Zur Bildung einer derartigen Abstreifeinrichtung 8 kann, wie am besten aus Figur 3 erkennbar ist, eine Rakelein­richtung vorgesehen sein. Die der Figur 3 zugrundeliegen­de Rakeleinrichtung besteht aus einem auf einem zugeord­neten Rakelhalter 9 aufgenommenen Rakelblatt 10. Hierbei handelt es sich im dargestellten Ausführungsbeispiel um ein vergleichseweise dickes, aus Hartgummi oder gummiähn­lichem Material bestehendes Rakelblatt, das mit posi­tivem Anstellwinkel am Umfang der zugeordneten Kühlwal­ze 6 anliegt. Der das Rakelblatt 10 aufnehmende Rakel­halter ist seinerseits an den Seitenwänden 7 des Kühl­aggregats 4 gelagert. Zur Bildung einer changierenden Bewegung des Rakelblatts 10 kann der Rakelhalter 9 oszillierend angetrieben sein. Zur Erleichterung des Ein­zugs der Papierbahn 1 ist der Rakelhalter 9 schwenkbar angeordnet, so daß das Rakelblatt 10 von der zugeordne­ten Kühlwalze 6 abgeschwenkt werden kann. Die Verwendung eines mit positivem Anstellwinkel anliegenden Gummi­rakels gewährleistet eine starke Schonung der Umfangs­fläche der zugeordneten Kühlwalze 6. Das mittels des Ra­kelsblatts 10 abgestreifte Öl wird mittels einer geeig­neten Drainage abgeleitet. Im dargestellten Ausführungs­beispiel tropft dieses Öl über die hintere Kante des Rakelblatts 10 ab und wird durch eine diese Tropfkante unterfassende, mit Gefälle angeordnete Rinne 11 abgelei­tet, die ebenfalls am Rakelhalter 9 befestigt sein kann.To form such a stripping device 8, as can best be seen from FIG. 3, a doctor device can be provided. The squeegee device on which FIG. 3 is based consists of a squeegee sheet 10 received on an associated squeegee holder 9. This is a comparatively thick squeegee sheet made of hard rubber or rubber-like material, which rests with a positive angle of attack on the circumference of the associated cooling roller 6. The doctor blade holder receiving the doctor blade 10 is in turn mounted on the side walls 7 of the cooling unit 4. To form an oscillating movement of the doctor blade 10, the doctor holder 9 can be driven to oscillate. To facilitate the retraction of the paper web 1, the doctor blade holder 9 is pivotally arranged so that the doctor blade 10 can be pivoted away from the associated cooling roller 6. The usage a rubber squeegee with a positive angle of attack ensures that the circumferential surface of the assigned cooling roller 6 is protected gently. The oil stripped off by means of the squeegee blade 10 is drained off by means of a suitable drainage. In the exemplary embodiment shown, this oil drips off over the rear edge of the doctor blade 10 and is drained off through a channel 11 which slopes down this drip edge and which can also be fastened to the doctor holder 9.

Die der Figur 4 zugrundeliegende Abstreifeinrichtung ar­beitet mit einem an den Umfang der jeweils zugeordneten Kühlwalze 6 andrückbaren Tuch 12, welches das Öl ab­streift und gleichzeitig abtransportiert, so daß eine zu­sätzliche Drainage entfallen kann. Die der Figur 4 zu­grundeliegende Abstreifeinrichtung besteht aus einem am Umfang der zugeordneten Kühlwalze 6 zur Anlage bring­baren, kühlwalzenparallelen Andrückbalken 13, über den das Tuch 12 geführt ist, das von einer Vorratsrolle 14 abwickelbar und auf eine Speicherrolle 15 aufwickelbar ist. Das Tuch 12 wird in vorgegebenen Abständen schritt­weise bewegt, wobei bei jedem Schritt ein neuer, unver­brauchter Streifen des Tuchs 12 zur Anlage an der abzu­schreifenden Kühlwalze 6 kommt. Dementsprechend sind die Vorratsrolle 14 und Speicherrolle 15 intermittierend schrittweise antreibbar. Der Durchmesser der auf der Vor­ratsrolle 14 vorhandenen Tuchwicklung wird mittels eines Tasters 16 abgetastet, der beim Erreichen eines minima­len Wickeldurchmessers ein das Ende des Tuchs 12 anzei­gendes Signal auslöst, so daß ein neues Tuch, das heißt neue Rollen, eingelegt werden können. Es kann daher nicht vorkommen, daß der Umfang der zugeordneten Kühl­ walze 6 längere Zeit nicht abgestreift wird. Das Tuch 12 kommt in trockenem Zustand zur Anlage am Umfang der zugeordneten Kühlwalze 6. Eine Tuchbefeuchtungseinrich­tung ist daher nicht erforderlich. Bei dem Tuch 12 handelt es sich dementsprechend um ein trockenes Wisch­tuch z. B. aus Baumwolle und/oder geeigneter Kunstfaser.The wiping device on which FIG. 4 is based works with a cloth 12 which can be pressed onto the circumference of the respectively assigned cooling roller 6 and which wipes off the oil and at the same time transports it away, so that additional drainage can be dispensed with. The stripping device on which FIG. 4 is based consists of a pressure bar 13 which can be brought into contact with the circumference of the assigned cooling roller 6 and over which the cloth 12 is guided and which can be unwound from a supply roll 14 and wound onto a storage roll 15. The cloth 12 is moved step by step at predetermined intervals, a new, unused strip of the cloth 12 coming into contact with the cooling roller 6 to be scraped at each step. Accordingly, the supply roll 14 and storage roll 15 can be driven intermittently step by step. The diameter of the cloth winding present on the supply roll 14 is scanned by means of a button 16 which, when a minimum winding diameter is reached, triggers a signal which indicates the end of the cloth 12, so that a new cloth, that is to say new rolls, can be inserted. It can therefore not happen that the extent of the assigned cooling roller 6 is not stripped for a long time. The cloth 12 comes into contact with the periphery of the assigned cooling roller 6 in the dry state. A cloth moistening device is therefore not necessary. Accordingly, the cloth 12 is a dry wipe z. B. made of cotton and / or suitable synthetic fiber.

Der Andrückbalken 13 besteht im dargestellten Aus­führungsbeispiel aus einer durchgehenden, auf seitlichen Haltern 17 aufgenommenen Schiene 18, die im Bereich ihrer der zugeordneten Kühlwalze 6 zugewandten Seite von einer Kappe 19 aus elastischem Material wie Gummi oder dergleichen, umfaßt ist, über welche das Tuch 12 hinweg geht. Die Längskanten der Kappe 19 können durch an der leistenförmigen Schiene 18 befestigte Halteklauen 20 ge­sichert sein. Die auf den Andrückbalken 13 auf- bzw. hiervon ablaufenden Bereiche des Tuchs 12 sind über Ab­lenkbügel 21 bzw. 22 geführt, um das Tuch 12 von den Seitenflanken des Andrückbalkens 13 wegzuhalten und eine leichte Bewegbarkeit des Tuchs 12 zu gewährleisten. Die Ablenkbügel 21 bzw. 22 können einfach als an den Haltern 19 aufgenommene Bleche ausgebildet sein.In the exemplary embodiment shown, the pressure bar 13 consists of a continuous rail 18 which is received on lateral holders 17 and which, in the region of its side facing the associated cooling roller 6, is encompassed by a cap 19 made of elastic material such as rubber or the like, over which the cloth 12 passes goes. The longitudinal edges of the cap 19 can be secured by holding claws 20 fastened to the strip-shaped rail 18. The areas of the cloth 12 running on or from the pressure bar 13 are guided over deflection brackets 21 and 22 in order to keep the cloth 12 away from the side flanks of the pressure bar 13 and to ensure easy movement of the cloth 12. The deflection brackets 21 and 22 can simply be designed as sheets received on the holders 19.

Die seitlichen Lagerzapfen der Rollen 14 bzw. 15 sind auf seitlichen Lagerschildern 23 aufgenommen. Dasselbe gilt für die Halter 19 des Andrückbalkens 13, der somit praktisch eine die Lagerschilde 23 starr miteinander ver­bindende Traverse bildet, so daß sich praktisch ein in sich starres Gestell 24 ergibt. Dieses kann mittels ei­ner Achse 25 schwenkbar an den Seitenwänden 7 des zuge­ordneten Kühlaggregats 4 gelagert sein. Die der Figur 4 zugrundeliegende Anpreßstellung des Gestells 24 kann mittels einer feststellbaren, zwecks Nachstellbarkeit einstellbaren Halteeinrichtung 26 gesichert sein. Das­selbe gilt auch für den Rakelhalter 9 der Figur 3.The lateral bearing journals of the rollers 14 and 15 are received on side bearing plates 23. The same applies to the holder 19 of the pressure beam 13, which thus practically forms a cross member rigidly interconnecting the end shields 23, so that there is practically a rigid frame 24. This can be pivotally mounted on the side walls 7 of the associated cooling unit 4 by means of an axis 25. The pressure position of the frame 24 on which FIG. 4 is based can be secured by means of a fixable holding device 26 which can be set for the purpose of readjustment. The same also applies to the squeegee holder 9 of FIG. 3.

Claims (10)

1. Vorrichtung zur Kühlung von ölhaltigem, vorzugsweise bahnförmigem Material, mit wenigstens einer, vorzugs­weise einem Trockner nachgeordneten Kühlwalze, insbe­sondere Rollenrotationsdurckmaschine mit nachgeord­netem Trockner und diesem nachgeordneter Kühleinrich­tung, dadurch gekennzeichnet, daß zumindest an die einlaufseitige Kühlwalze (6) eine Abstreifeinrichtung (8) anstellbar ist.1. Device for cooling oil-containing, preferably web-shaped material, with at least one, preferably a dryer downstream cooling roller, in particular roller rotary press machine with downstream dryer and this downstream cooling device, characterized in that at least on the inlet-side cooling roller (6) a stripping device (8) can be employed is. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß bei einer Kühleinrichtung mit mehreren, vorzugs­weise vier Kühlwalzen (6), mehreren, vorzugsweise den beiden einlaufseitigen Kühlwalzen (6), jeweils eine Abstreifeinrichtung (8) zugeordnet ist.2. Device according to claim 1, characterized in that in a cooling device with several, preferably four cooling rollers (6), several, preferably the two inlet-side cooling rollers (6), each one Scraper device (8) is assigned. 3. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Abstreifeinrichtung (8) ein vorzugsweise changierend antreibbares Rakel­blatt (10) aufweist.3. Device according to one of the preceding claims, characterized in that the stripping device (8) has a doctor blade (10) which can preferably be driven in an oscillating manner. 4. Vorrichtung nach Anspruch 3,dadurch gekennzeichnet, daß das Rakelblatt (10) als mit positivem Anstell­winkel an der zugeordneten Kühlwalze (6) anliegendes Gummirakel ausgebildet ist.4. The device according to claim 3, characterized in that the doctor blade (10) is designed as a positive doctor blade at the associated cooling roller (6) adjacent rubber doctor. 5. Vorrichtung nach einem der vorhergehenden Ansprüche 1 bis 2, dadurch gekennzeichnet, daß die Abstreifein­richtung (8) ein Tuch (12) aufweist, das über ein am Umfang der zugeordneten Kühlwalze (6) anliegendes An­drückorgan geführt ist.5. Device according to one of the preceding claims 1 to 2, characterized in that the stripping device (8) has a cloth (12) which is guided over a pressing member on the circumference of the associated cooling roller (6). 6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß das Tuch (12) von einer Vorratsrolle (14) ab­wickelbar und auf eine Speicherrolle (15) aufwickel­bar ist.6. The device according to claim 5, characterized in that the cloth (12) can be unwound from a supply roll (14) and wound onto a storage roll (15). 7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die Vorratsrolle (14) und Speicherrolle (15) intermittierend schrittweise antreibbar sind.7. The device according to claim 6, characterized in that the supply roll (14) and storage roll (15) can be driven intermittently step by step. 8. Vorrichtung nach einem der vorhergehenden Ansprüche 5 bis 7, dadurch gekennzeichnet, daß das Andrückorgan als Andrückbalken (13) mit einer von einer elastischen Kappe (17) umfaßten Schiene (18) ausgebildet ist.8. Device according to one of the preceding claims 5 to 7, characterized in that the pressing member is designed as a pressing bar (13) with a rail (18) enclosed by an elastic cap (17). 9. Vorrichtung nach einem der vorhergehenden Ansprüche 5 bis 8, dadurch gekennzeichnet, daß die Abstreifein­richtung (8) ein Gestell (24) mit zwei seitlichen, durch Traversen miteinander verbundenen Lagerschil­dern (23) aufweist, das an den Seitenwänden (7) der Kühleinrichtung (4) aufgenommen ist.9. Device according to one of the preceding claims 5 to 8, characterized in that the stripping device (8) has a frame (24) with two lateral bearing plates interconnected by traverses (23) which on the side walls (7) of the cooling device ( 4) is included. 10. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Abstreifeinrichtung (8) vorzugsweise in Form des Gestells (24), schwenk­bar und in der Abstreifstellung feststellbar an den Seitenwänden (7) der Kühleinrichtung (4) aufgenommen ist.10. Device according to one of the preceding claims, characterized in that the stripping device (8) is preferably in the form of the frame (24), pivotable and lockable in the stripping position on the side walls (7) of the cooling device (4).
EP88107570A 1987-05-22 1988-05-11 Device for cooling a paper web Expired - Lifetime EP0291841B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88107570T ATE54610T1 (en) 1987-05-22 1988-05-11 DEVICE FOR COOLING A PAPER WEB.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8707392U DE8707392U1 (en) 1987-05-22 1987-05-22 Device for cooling oily material
DE8707392U 1987-05-22

Publications (3)

Publication Number Publication Date
EP0291841A2 true EP0291841A2 (en) 1988-11-23
EP0291841A3 EP0291841A3 (en) 1989-09-27
EP0291841B1 EP0291841B1 (en) 1990-07-18

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ID=6808400

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Application Number Title Priority Date Filing Date
EP88107570A Expired - Lifetime EP0291841B1 (en) 1987-05-22 1988-05-11 Device for cooling a paper web

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EP (1) EP0291841B1 (en)
JP (1) JPS63303742A (en)
AT (1) ATE54610T1 (en)
DE (2) DE8707392U1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6318263B1 (en) * 1999-04-21 2001-11-20 Heidelberger Druckmaschinen Ag Cooling and moistening unit for rotary printing machines
EP2650130A1 (en) * 2010-10-07 2013-10-16 manroland web systems GmbH Cooling assembly of a printing press
CN116021879A (en) * 2023-03-28 2023-04-28 江苏汇海新材料科技有限公司 Drying device for film printing

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3844770C2 (en) * 1988-11-15 1994-05-26 Baldwin Gegenheimer Gmbh Wiper for pressure cylinder of rotary printing machine
DE4409954A1 (en) * 1994-03-23 1995-09-28 Bse Printtechnologie Rotary offset heat-set printer for lengths of product
DE4437018B4 (en) * 1994-10-17 2004-07-01 Baldwin Germany Gmbh press
JP4698082B2 (en) * 2001-07-27 2011-06-08 大日本印刷株式会社 Cooling device for offset printing machine

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Publication number Priority date Publication date Assignee Title
DE860041C (en) * 1949-06-11 1952-12-18 Eduard Kuesters Method and device for multicolored overprinting of colors on roller printing machines, especially for textile fabric printing

Non-Patent Citations (1)

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Title
None

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6318263B1 (en) * 1999-04-21 2001-11-20 Heidelberger Druckmaschinen Ag Cooling and moistening unit for rotary printing machines
EP2650130A1 (en) * 2010-10-07 2013-10-16 manroland web systems GmbH Cooling assembly of a printing press
CN116021879A (en) * 2023-03-28 2023-04-28 江苏汇海新材料科技有限公司 Drying device for film printing

Also Published As

Publication number Publication date
JPS63303742A (en) 1988-12-12
EP0291841B1 (en) 1990-07-18
DE3860328D1 (en) 1990-08-23
DE8707392U1 (en) 1987-07-16
ATE54610T1 (en) 1990-08-15
EP0291841A3 (en) 1989-09-27

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