EP0156236B1 - Roll for processing a flat web-like material - Google Patents

Roll for processing a flat web-like material Download PDF

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Publication number
EP0156236B1
EP0156236B1 EP85102805A EP85102805A EP0156236B1 EP 0156236 B1 EP0156236 B1 EP 0156236B1 EP 85102805 A EP85102805 A EP 85102805A EP 85102805 A EP85102805 A EP 85102805A EP 0156236 B1 EP0156236 B1 EP 0156236B1
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EP
European Patent Office
Prior art keywords
cylinder wall
metal
roll according
pipe
pipe coil
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
Application number
EP85102805A
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German (de)
French (fr)
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EP0156236A3 (en
EP0156236A2 (en
Inventor
Klaus Reinhold
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Individual
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Individual
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Priority to AT85102805T priority Critical patent/ATE36179T1/en
Publication of EP0156236A2 publication Critical patent/EP0156236A2/en
Publication of EP0156236A3 publication Critical patent/EP0156236A3/en
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Publication of EP0156236B1 publication Critical patent/EP0156236B1/en
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/02—Drying on cylinders
    • D21F5/022—Heating the cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
    • F26B13/14—Rollers, drums, cylinders; Arrangement of drives, supports, bearings, cleaning
    • F26B13/18—Rollers, drums, cylinders; Arrangement of drives, supports, bearings, cleaning heated or cooled, e.g. from inside, the material being dried on the outside surface by conduction
    • F26B13/183—Arrangements for heating, cooling, condensate removal

Definitions

  • the invention relates to a roller for processing sheet-like or strip-shaped flat material, consisting of a cylindrical hollow body made of metal, in the cylinder wall of which a screw-shaped tubular coil made of metal through which a heating or cooling medium can be poured is poured and the end faces of which comprise a line passage for the flow medium Terminations is closed.
  • Such a roller is known from GB-A 486447.
  • the known roller described there is made of cast iron or steel, while the material of the embedded snake is specified as copper or steel, the melting temperature of which is therefore equal to or less than that of the cylinder wall.
  • Such rollers are used as heating or cooling rollers for processing sheet or strip-shaped flat material, such as textiles, paper, cardboard, plastic or metal foils, around these materials in the course of their manufacture or processing or further treatment through their contact engagement with the cylinder wall to heat or cool the roller.
  • the web-like or band-shaped flat material is generally guided over the roller with partial wrapping around the cylinder jacket, the roller being rotatably mounted and possibly being driven in a suitable manner.
  • the cylindrical metal hollow body forming the roller consists of a roller core with a central bore, the medium channel through which the heating or cooling medium can flow being formed by helical channels which are cut into the surface of the roller core.
  • a helical channel for the flow medium is formed in this way.
  • the invention has for its object to provide a roller for processing sheet or strip-shaped flat material that is simple to manufacture, avoids sealing problems in the region of the cylinder wall and develops a highly effective heating or cooling output.
  • this object is achieved according to the invention in that the metal of the coil has a significantly higher melting temperature than the metal of the cast cylinder wall, so that the coil is firmly connected to the metal of the cylinder wall by shrinking engagement.
  • the high manufacturing outlay of a two-part heating or cooling roller with a flow channel for the heating or cooling medium incorporated into the surface of the roller core is avoided in a simple manner by the cylinder wall being formed by a cast tube in which the one defining the helical medium channel Pipe coil as a simple prefabricated component is firmly anchored by shrinking engagement with the cast and solidified metal.
  • the metal of the prefabricated pipe coil has a significantly higher melting temperature than the casting metal that forms the cylinder wall, which surrounds the solid pipe coil on all sides during the pouring process and shrinks onto the pipe coil when it cools down with solidification.
  • the intimate connection of the pipe coil with the metal of the cylinder wall achieved in this way not only avoids any sealing problems in the area of the cylinder wall, but also rapid temperature control and a highly effective heating or cooling output through rapid, good heat conduction through the cylinder wall.
  • cylinder wall is formed by a centrifugally cast tube, in the wall of which the tube coil is also cast, has proven particularly advantageous.
  • the particularly fine, dense structure of the cylinder wall with very good strength properties achieved by the centrifugal casting has a further favorable influence on the heat transfer through the cylinder wall and the anchoring engagement of the pipe coil, the pipe coil being a simple, prefabricated component in the application in centrifugal casting Finding rotary form can be used and fixed.
  • all suitable metals or alloys can be used as casting metal for the cylinder wall and as metal for the prefabricated pipe coil, in which the melting temperature of the pipe coil is significantly higher than that of the casting metal, since a change in the shape of the pipe coil during the casting process due to softening or melting of its metal is to be avoided.
  • the pipe coil is made of steel or a steel alloy and the cylinder wall is made of aluminum or an aluminum alloy.
  • the melting points of steel and aluminum are so far apart that the shape changes prefabricated steel tube coil is excluded by softening while casting the cylinder wall.
  • a pipe coil made of steel is so strong that the shrinkage forces that occur when the cast aluminum solidifies can be safely absorbed by the pipe coil. It is advisable to cool the cast part at ambient temperature in order to ensure that the cast metal shrinks slowly and therefore evenly onto the steel tube coil in the interest of an intimate anchoring.
  • one of the two end closures forms a bearing base which closes the associated end face of the hollow body, while the other end closure is designed as a bearing and connecting base with the line passage for the flow medium, which comprises two coaxial flow channels, each of which has a flexible one Connection line are connected to the inflow or the return flow end of the pipe coil in an area immediately adjacent to the bearing and connecting base.
  • the cylinder wall 2 is formed by a centrifugally cast tube, in the wall of which a pipe coil 5 made of metal with a higher melting point than the metal of the cylinder wall 2, such as steel, is also cast in and is thereby firmly connected to the cylinder wall.
  • the coil 5 forms a helical channel through which a heating or cooling medium flows when the roller is operating. All flow media in liquid, steam or gas form suitable for this purpose can be considered as heating or cooling medium. Since the pipe coil 5 cast into the cylinder wall 2 does not cause any sealing problems, it is in particular also possible to connect the roll to a pipe with a cooling gas e.g. to connect a freezer that works on methane.
  • the thickness of the cylinder wall 2, as is customary in centrifugal cast pipes, is only a fraction of the pipe diameter, for example 1/6, which favors rapid temperature control due to the small masses involved.
  • the end closure 3 comprises a bearing base 6 which closes the associated end face of the hollow body 1 and is welded to the cylinder wall 2.
  • the end closure 3 further comprises a bearing bolt 8 which is screwed to the bearing base 6 by means of a screw flange 9.
  • the other end closure 4 is designed as a bearing and connection base with a line passage for the flow medium, which comprises two coaxial flow channels 10 and 11.
  • One of the two flow channels 10, 11, in the selected example the flow channel 10 is in flow connection with the inflow end 12 and, accordingly, the other flow channel 11 with the return flow end 13 of the pipe coil 5.
  • the inflow end 12 and the return flow end 13 of the pipe coil 5 lie close together in the cylinder wall 2 in the end region of the cylinder wall 2 adjoining the end closure 4.
  • the pipe coil 5 is provided with a reversing bend 14.
  • the pipe coil extends helically in the cylinder wall 2, as is illustrated by the pipe axis 15 shown in broken lines.
  • the end closure 4 comprises an outer base ring 16, which is welded to the cylinder wall 2, and an outer cover 17 and an inner cover 18.
  • the outer cover 17 is screwed to the base ring 16 by means of a screw flange 19 and has an outer bearing journal 20 for rotatably supporting the roller in a bearing schematically indicated at 21.
  • the bearing journal 20 is connected to a known rotary inlet 22 for the flow medium, which comprises a medium inflow 23 and a medium outflow 24.
  • the rotary lead-in 22 has a threaded pin 25 to which the bearing pin 20 is screwed.
  • the two coaxial flow channels 10 and 11 extend through the bearing journal 20.
  • the flow channel 10 is formed by an inner tube 26 which is fixed at one end in the rotary inlet 22 and is in flow connection with the medium inlet 23 thereof.
  • the other end of the inner tube 26 is fixed in a central insert part 27 of the inner cover 18, which engages in a central opening in the outer cover 17.
  • the flow channel 11 is formed by an annular space 28, which surrounds the inner tube 26 and is formed in the interior of the bearing pin 20 and which at one end extends into a corresponding annular space of the connecting pin 25 of the rotary lead-in 22 Connection pin 25 of the rotary inlet 22 continued and in this is in flow communication with the medium outlet 24 of the rotary inlet 22 via an enlarged annular space 29.
  • the annular space 11 opens out via an enlarged annular space 30 into an axial channel 31 extending through the inner cover 18.
  • the end regions of the two flow channels 10 and 11 which open out in the inner cover 18 are each connected via a flexible connecting line 32, 33 to the inflow end 12 and the return flow end 13 of the pipe coil 5, e.g. screwed.
  • the flexible connecting line 32 connects a short axial channel 34 in the extension of a central bore 35, in which the inner tube 26 is fixed, to the inner medium channel 10.
  • the flexible connecting line 33 is in turn connected to the axial through channel 31 of the inner cover 18.
  • the inner cover 18 also has an edge flange 36 with which it is screwed in a sealing manner with the interposition of an annular seal 37 with the inside of the outer ring 17. Furthermore, the central insert part 27 of the inner ring 18 in the bore 35 is provided with an annular seal 38 which is in sealing engagement with the outer circumference of the inner tube 26 and seals this against the flow channel 11.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Paper (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

A roll for processing material in the form of a web or strip consists of a cylindrical hollow body of metal, in the cylinder wall of which there is provided a helical medium passage through which a heating or cooling medium can flow. In order to avoid sealing problems in the region of the cylinder wall and to achieve a high heating or cooling performance, the cylinder wall is formed from a cast metal tube and the helical medium passage is formed from a spiral tube of a metal having a distinctly higher melting temperature in comparison with that of the cylinder wall, the spiral tube being rigidly embedded in the cylinder wall during casting thereof. The cylinder wall consists particularly advantageously of a centrifugally cast tube, preferably of aluminium, in the wall of which the spiral tube is included in the casting.

Description

Die Erfindung betrifft eine Walze zum Bearbeiten von bahn- oder bandförmigen Flachmaterial, bestehend aus einem zylindrischen Hohlkörper aus Metall, in dessen Zylinderwand eine schraubengangförmige, von einem Heiz- oder Kühlmedium durchströmbare Rohrschlange aus Metall eingegossen ist und dessen Stirnseiten von einen Leitungsdurchgang für das Strömungsmedium umfassenden Endverschlüssen geschlossen ist.The invention relates to a roller for processing sheet-like or strip-shaped flat material, consisting of a cylindrical hollow body made of metal, in the cylinder wall of which a screw-shaped tubular coil made of metal through which a heating or cooling medium can be poured is poured and the end faces of which comprise a line passage for the flow medium Terminations is closed.

Eine derartige Walze ist aus der GB-A 486447 bekannt. Die dort beschriebene bekannte Walze ist aus Gusseisen oder -Stahl, während das Material der eingebetteten Schlange als Kupfer oder Stahl angegeben wird, dessen Schmelztemperatur also gleich oder kleiner ist als die der Zylinderwand. Derartige Walzen finden als Heiz- oder Kühlwalze zum Bearbeiten von bahn- oder bandförmigem Flachmaterial, wie Textilien, Papier, Pappe, Kunststoff- oder Metallfolien, Anwendung, um diese Materialien im Zuge ihrer Herstellung oder Verarbeitung bzw. weiteren Behandlung durch ihren Berührungseingriff mit der Zylinderwand der Walze zu erwärmen oder zu kühlen. Das bahn- oder bandförmige Flachmaterial wird hierbei in der Regel über die Walze unter teilweiser Umschlingung des Zylindermantels hinweggeführt, wobei die Walze drehbar gelagert und ggf. in geeigneter Weise angetrieben ist.Such a roller is known from GB-A 486447. The known roller described there is made of cast iron or steel, while the material of the embedded snake is specified as copper or steel, the melting temperature of which is therefore equal to or less than that of the cylinder wall. Such rollers are used as heating or cooling rollers for processing sheet or strip-shaped flat material, such as textiles, paper, cardboard, plastic or metal foils, around these materials in the course of their manufacture or processing or further treatment through their contact engagement with the cylinder wall to heat or cool the roller. The web-like or band-shaped flat material is generally guided over the roller with partial wrapping around the cylinder jacket, the roller being rotatably mounted and possibly being driven in a suitable manner.

Bei einer anderen bekannten Walze der angegebenen Art besteht der die Walze bildende zylindrische Metall-Hohlkörper aus einem Walzenkern mit einer zentralen Bohrung, wobei der von dem Heiz- oder Kühlmedium durchströmbare Mediumkanal von schraubengangförmigen Rinnen gebildet ist, die in die Oberfläche des Walzenkerns eingeschnitten sind. In Verbindung mit einem Walzenmantel, der nach dem Einschneiden der Rinnen mit dem Walzenkern zu vereinigen ist, ist auf diese Weise jeweils ein schraubengangförmiger Kanal für das Strömungsmedium gebildet.In another known roller of the specified type, the cylindrical metal hollow body forming the roller consists of a roller core with a central bore, the medium channel through which the heating or cooling medium can flow being formed by helical channels which are cut into the surface of the roller core. In connection with a roll jacket, which is to be combined with the roll core after the grooves have been cut, a helical channel for the flow medium is formed in this way.

Die Herstellung dieser bekannten Heiz- oder Kühlwalzen ist mit einem sehr hohen Arbeitsaufwand verbunden, der insbesondere dadurch verursacht ist, dass in Verbindung mit der Erzeugung der Strömungsmittelkanäle eine sehr sorgfältige Bearbeitung der Oberfläche des Walzenkerns und der mit dieser zusammenwirkenden Oberfläche der abschliessend aufzubringenden Mantelhülse erforderlich ist. Ausserdem besteht bei in dieser Weise zweiteilig ausgebildeten, von einem Heiz- oder Kühlmedium in ihrer Wandung durchströmten Walzen stets das Problem von Undichtigkeiten zwischen dem Walzenkern und dem Walzenmantel und Leckverlusten des Strömungsmediums.The production of these known heating or cooling rolls is associated with a very high amount of work, which is caused in particular by the fact that in connection with the production of the fluid channels, very careful machining of the surface of the roll core and the surface of the casing sleeve to be finally applied, which surface cooperates with it, is required . In addition, there are always the problem of leaks between the roll core and the roll shell and leakage losses of the flow medium in the case of rolls which are formed in two parts and flow through their walls by a heating or cooling medium.

Der Erfindung liegt die Aufgabe zugrunde, eine Walze zum Bearbeiten von bahn- oder bandförmigem Flachmaterial zu schaffen, die einfach in ihrer Herstellung ist, Dichtungsprobleme im Bereich der Zylinderwand vermeidet und eine hochwirksame Heiz- oder Kühlleistung entfaltet.The invention has for its object to provide a roller for processing sheet or strip-shaped flat material that is simple to manufacture, avoids sealing problems in the region of the cylinder wall and develops a highly effective heating or cooling output.

Ausgehend von einer Walze der eingangs angegebenen Art wird diese Aufgabe nach der Erfindung dadurch gelöst, dass das Metall der Rohrschlange eine deutlich höhere Schmelztemperatur hat als das Metall der gegossenen Zylinderwand, so dass die Rohrschlange durch Schrumpfeingriff mit dem Metall der Zylinderwand fest verbunden ist.Starting from a roller of the type specified at the outset, this object is achieved according to the invention in that the metal of the coil has a significantly higher melting temperature than the metal of the cast cylinder wall, so that the coil is firmly connected to the metal of the cylinder wall by shrinking engagement.

Bei dieser Ausgestaltung ist der hohe Herstellungsaufwand einer zweiteilig aufgebauten Heiz-oder Kühlwalze mit in die Oberfläche des Walzenkerns eingearbeitetem Strömungskanal für das Heiz- oder Kühlmedium auf einfache Weise dadurch vermieden, dass die Zylinderwand von einem Gussrohr gebildet ist, in dem die den schraubengangförmigen Mediumkanal definierende Rohrschlange als seinerseits einfaches vorgefertigtes Bauteil durch Schrumpfeingriff mit dem gegossenen und erstarrten Metall fest verankert ist.In this embodiment, the high manufacturing outlay of a two-part heating or cooling roller with a flow channel for the heating or cooling medium incorporated into the surface of the roller core is avoided in a simple manner by the cylinder wall being formed by a cast tube in which the one defining the helical medium channel Pipe coil as a simple prefabricated component is firmly anchored by shrinking engagement with the cast and solidified metal.

Dieser feste Verankerungseingriff ist dadurch gewährleistet, dass das Metall der vorgefertigten Rohrschlange eine deutlich höhere Schmelztemperatur besitzt als das die Zylinderwand bildende Giessmetall, das während des Giessvorgangs im flüssigen Zustand die feste Rohrschlange allseits umgibt und bei seinem Abkühlen unter Erstarrung auf die Rohrschlange aufschrumpft. Durch die auf diese Weise erreichte innige Verbindung der Rohrschlange mit dem Metall der Zylinderwand sind nicht nur jegliche Dichtungsprobleme im Bereich der Zylinderwand vermieden, sondern auch eine schnelle Temperaturregelung und eine hochwirksame Heiz- oder Kühlleistung durch rasche, gute Wärmeleitung durch die Zylinderwand erreicht.This firm anchoring intervention is ensured by the fact that the metal of the prefabricated pipe coil has a significantly higher melting temperature than the casting metal that forms the cylinder wall, which surrounds the solid pipe coil on all sides during the pouring process and shrinks onto the pipe coil when it cools down with solidification. The intimate connection of the pipe coil with the metal of the cylinder wall achieved in this way not only avoids any sealing problems in the area of the cylinder wall, but also rapid temperature control and a highly effective heating or cooling output through rapid, good heat conduction through the cylinder wall.

Besonders vorteilhaft erweist sich hierbei eine Ausgestaltung, bei der die Zylinderwand von einem Schleudergussrohr gebildet ist, in desssen Wandung die Rohrschlange miteingegossen ist. Das durch den Schleuderguss erreichte besonders feine, dichte Gefüge der Zylinderwand mit sehr guten Festigkeitseigenschaften hat einen die Wärmeübertragung durch die Zylinderwand und den Verankerungseingriff der Rohrschlange mit dieser weiter begünstigenden Einfluss, wobei die Rohrschlange im übrigen auf einfache Weise als vorgefertigtes Bauteil in die beim Schleuderguss Anwendung findende Drehform eingesetzt und fixiert werden kann.An embodiment in which the cylinder wall is formed by a centrifugally cast tube, in the wall of which the tube coil is also cast, has proven particularly advantageous. The particularly fine, dense structure of the cylinder wall with very good strength properties achieved by the centrifugal casting has a further favorable influence on the heat transfer through the cylinder wall and the anchoring engagement of the pipe coil, the pipe coil being a simple, prefabricated component in the application in centrifugal casting Finding rotary form can be used and fixed.

Grundsätzlich können alle geeigneten Metalle oder Legierungen als Giessmetall für die Zylinderwand und als Metall für die vorgefertigte Rohrschlange Anwendung finden, bei denen die Schmelztemperatur der Rohrschlange deutlich höher als die des Giessmetalls ist, da während des Giessvorgangs eine Formveränderung der Rohrschlange durch Erweichen oder Schmelzen ihres Metalls zu vermeiden ist. Unter praktischen Gesichtspunkten als besonders vorteilhaft hat sich hierbei eine Ausgestaltung erwiesen, bei der die Rohrschlange aus Stahl oder einer Stahllegierung und die Zylinderwand aus Aluminium oder einer Aluminiumlegierung besteht. Die Schmelzpunkte von Stahl und Aluminium liegen so weit auseinander, dass eine Formveränderung der vorgefertigten Stahlrohrschlange durch Erweichen während des Giessens der Zylinderwand ausgeschlossen ist. Ausserdem besitzt eine aus Stahl gefertigte Rohrschlange eine so hohe Festigkeit, dass die beim Erstarren des gegossenen Aluminiums auftretenden Schrumpfkräfte gefahrlos von der Rohrschlange aufgenommen werden können. Dabei empfiehlt es sich, die Abkühlung des Gussteils bei Umgebungstemperatur durchzuführen, um ein langsames und daher gleichmässiges Aufschrumpfen des Giessmetalls auf die Stahlrohrschlange im Interesse einer innigen Verankerung zu gewährleisten.In principle, all suitable metals or alloys can be used as casting metal for the cylinder wall and as metal for the prefabricated pipe coil, in which the melting temperature of the pipe coil is significantly higher than that of the casting metal, since a change in the shape of the pipe coil during the casting process due to softening or melting of its metal is to be avoided. From a practical point of view, an embodiment has proven to be particularly advantageous in which the pipe coil is made of steel or a steel alloy and the cylinder wall is made of aluminum or an aluminum alloy. The melting points of steel and aluminum are so far apart that the shape changes prefabricated steel tube coil is excluded by softening while casting the cylinder wall. In addition, a pipe coil made of steel is so strong that the shrinkage forces that occur when the cast aluminum solidifies can be safely absorbed by the pipe coil. It is advisable to cool the cast part at ambient temperature in order to ensure that the cast metal shrinks slowly and therefore evenly onto the steel tube coil in the interest of an intimate anchoring.

In weiterer Ausgestaltung der Erfindung bildet von den beiden Endverschlüssen einer einen die zugehörige Stirnseite des Hohlkörpers insgesamt abschliessenden Lagerboden, während der andere Endverschluss als Lager- und Anschlussboden mit dem Leitungsdurchgang für das Strömungsmedium ausgebildet ist, der zwei koaxiale Strömungskanäle umfasst, die über je eine flexible Verbindungsleitung mit dem Zufluss- bzw. dem Rückflussende der Rohrschlange in einem an den Lager- und Anschlussboden unmittelbar angrenzenden Bereich verbunden sind.In a further embodiment of the invention, one of the two end closures forms a bearing base which closes the associated end face of the hollow body, while the other end closure is designed as a bearing and connecting base with the line passage for the flow medium, which comprises two coaxial flow channels, each of which has a flexible one Connection line are connected to the inflow or the return flow end of the pipe coil in an area immediately adjacent to the bearing and connecting base.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus den Ansprüchen und der nachstehenden Beschreibung in Verbindung mit der Zeichnung, in der ein Ausführungsbeispiel des Gegenstands der Erfindung veranschaulicht ist. In der Zeichnung zeigen:

  • Fig. 1 einen Längsschnitt durch eine erfindungsgemässe Heiz- oder Kühlwalze zum Bearbeiten von bahn- oder bandförmigen Flachmaterial und
  • Fig. 2 einen Endbereich der Walze nach Fig. 1 in gegenüber dieser vergrössertem Massstab.
Further features and advantages of the invention will become apparent from the claims and the following description in conjunction with the drawing, in which an embodiment of the object of the invention is illustrated. The drawing shows:
  • Fig. 1 shows a longitudinal section through a heating or cooling roller according to the invention for processing sheet or strip-shaped flat material and
  • Fig. 2 shows an end portion of the roller of FIG. 1 on a larger scale than this.

Die in der Zeichnung dargestellte Heiz- oder Kühlwalze zum Bearbeiten von bahn- oder bandförmigem Flachmaterial, wie Papier- oder Kunststoffolienbahnen, bestehend aus einem zylindrischen Hohlkörper 1 aus Metall, bei dem dargestellten Beispiel Aluminium, mit einer Zylinderwand 2 und zwei Endverschlüssen 3, 4, die jeweils eine der beiden Stirnseiten der Zylinderwand verschliessen. Die Zylinderwand 2 ist von einem Schleudergussrohr gebildet, in dessen Wandung eine Rohrschlange 5 aus Metall mit gegenüber dem Metall der Zylinderwand 2 höherem Schmelzpunkt, wie Stahl, miteingegossen und dadurch fest mit der Zylinderwand verbunden ist.The heating or cooling roll shown in the drawing for processing sheet or strip-shaped flat material, such as paper or plastic film sheets, consisting of a cylindrical hollow body 1 made of metal, in the example shown aluminum, with a cylinder wall 2 and two end closures 3, 4, which each close one of the two end faces of the cylinder wall. The cylinder wall 2 is formed by a centrifugally cast tube, in the wall of which a pipe coil 5 made of metal with a higher melting point than the metal of the cylinder wall 2, such as steel, is also cast in and is thereby firmly connected to the cylinder wall.

Die Rohrschlange 5 bildet einen schraubengangförmigen Kanal, der im Betrieb der Walze von einem Heiz- oder Kühlmedium durchströmt wird. Als Heiz- oder Kühlmedium kommen alle für diese Zwecke geeigneten Strömungsmedien in Flüssig-, Dampf- oder Gasform in Betracht. Da die in die Zylinderwand 2 eingegossene Rohrschlange 5 keine Dichtungsprobleme verursacht, ist es insbesondere auch möglich, die Walze an eine mit einem Kühlgas z.B. auf Methanbasis arbeitende Tiefkühlanlage anzuschliessen. Die Dikke der Zylinderwand 2 beträgt, wie bei Schleudergussrohren an sich üblich, nur einen Bruchteil des Rohrdurchmessers, beispielsweise 1/6, was eine schnelle Temperaturregelung aufgrund der geringen beteiligten Massen begünstigt.The coil 5 forms a helical channel through which a heating or cooling medium flows when the roller is operating. All flow media in liquid, steam or gas form suitable for this purpose can be considered as heating or cooling medium. Since the pipe coil 5 cast into the cylinder wall 2 does not cause any sealing problems, it is in particular also possible to connect the roll to a pipe with a cooling gas e.g. to connect a freezer that works on methane. The thickness of the cylinder wall 2, as is customary in centrifugal cast pipes, is only a fraction of the pipe diameter, for example 1/6, which favors rapid temperature control due to the small masses involved.

Der Endverschluss 3 umfasst einen die zugehörige Stirnseite des Hohlkörpers 1 insgesamt abschliessenden Lagerboden 6, der mit der Zylinderwand 2 verschweisst ist. Zur drehbaren Lagerung der Walze in einem bei 7 schematisch angedeuteten Lager umfasst der Endverschluss 3 ferner einen Lagerbolzen 8 der mittels eines Schraubflansches 9 mit dem Lagerboden 6 verschraubt ist.The end closure 3 comprises a bearing base 6 which closes the associated end face of the hollow body 1 and is welded to the cylinder wall 2. For the rotatable mounting of the roller in a bearing schematically indicated at 7, the end closure 3 further comprises a bearing bolt 8 which is screwed to the bearing base 6 by means of a screw flange 9.

Der andere Endverschluss 4 ist als Lager- und Anschlussboden mit einem Leitungsdurchgang für das Strömungsmedium ausgebildet, der zwei koaxiale Strömungskanäle 10 und 11 umfasst. Einer der beiden Strömungskanäle 10, 11, bei dem gewählten Beispiel der Strömungskanal 10, steht mit dem Zuflussende 12 und dementsprechend der andere Strömungskanal 11 mit dem Rückflussende 13 der Rohrschlange 5 in Strömungsverbindung. Das Zuflussende 12 und das Rückflussende 13 der Rohrschlange 5 liegen in der Zylinderwand 2 dicht beieinander in dem an den Endverschluss 4 angrenzenden Endbereich der Zylinderwand 2. In ihrem an den Endverschluss 3 angrenzenden Bereich ist dabei die Rohrschlange 5 mit einem Umkehrbogen 14 versehen. Zwischen dem Zu- und Rückflussende 12, 13 einerseits und dem Umkehrbogen 14 andererseits verläuft die Rohrschlange schraubenlinienförmig in der Zylinderwand 2, wie dies durch die strichpunktiert eingezeichnete Rohrachse 15 veranschaulicht ist.The other end closure 4 is designed as a bearing and connection base with a line passage for the flow medium, which comprises two coaxial flow channels 10 and 11. One of the two flow channels 10, 11, in the selected example the flow channel 10, is in flow connection with the inflow end 12 and, accordingly, the other flow channel 11 with the return flow end 13 of the pipe coil 5. The inflow end 12 and the return flow end 13 of the pipe coil 5 lie close together in the cylinder wall 2 in the end region of the cylinder wall 2 adjoining the end closure 4. In their region adjoining the end closure 3, the pipe coil 5 is provided with a reversing bend 14. Between the inflow and return flow ends 12, 13 on the one hand and the reversing bend 14 on the other hand, the pipe coil extends helically in the cylinder wall 2, as is illustrated by the pipe axis 15 shown in broken lines.

Der Endverschluss 4 umfasst einen äusseren Bodenring 16, der mit der Zylinderwand 2 verschweisst ist, sowie einen Aussendeckel 17 und einen Innendeckel 18. Der Aussendeckel 17 ist mittels eines Schraubflansches 19 mit dem Bodenring 16 verschraubt und besitzt einen äusseren Lagerzapfen 20 zur drehbaren Lagerung der Walze in einem bei 21 schematisch angedeuteten Lager. Der Lagerzapfen 20 ist mit einer an sich bekannten Dreheinführung (Rotary) 22 für das Strömungsmedium verbunden, die einen Mediumzufluss 23 und einen Mediumabfluss 24 umfasst. Für den Anschluss an die Walze besitzt die Dreheinführung 22 einen Gewindezapfen 25, mit dem der Lagerzapfen 20 verschraubt ist.The end closure 4 comprises an outer base ring 16, which is welded to the cylinder wall 2, and an outer cover 17 and an inner cover 18. The outer cover 17 is screwed to the base ring 16 by means of a screw flange 19 and has an outer bearing journal 20 for rotatably supporting the roller in a bearing schematically indicated at 21. The bearing journal 20 is connected to a known rotary inlet 22 for the flow medium, which comprises a medium inflow 23 and a medium outflow 24. For connection to the roller, the rotary lead-in 22 has a threaded pin 25 to which the bearing pin 20 is screwed.

Durch den Lagerzapfen 20 erstrecken sich die beiden koaxialen Strömungskanäle 10 und 11. Der Strömungskanal 10 ist von einem Innenrohr 26 gebildet, das mit seinem einen Ende in der Dreheinführung 22 festgelegt ist und mit deren Mediumzufluss 23 in Strömungsverbindung steht. Das andere Ende des Innenrohrs 26 ist in einem zentralen Einsatzteil 27 des Innendeckels 18 festgelegt, der in eine zentrale Öffnung des Aussendeckels 17 eingreift. Der Strömungskanal 11 ist von einem das Innenrohr 26 umgebenden, im Inneren des Lagerzapfens 20 ausgebildeten Ringraum 28 gebildet, der sich an seinem einen Ende in einem entsprechenden Ringraum des Anschlusszapfens 25 der Dreheinführung 22 fort-Anschlusszapfens 25 der Dreheinführung 22 fortgesetzt und in dieser über einen erweiterten Ringraum 29 mit dem Mediumabftuss 24 der Dreheinführung 22 in Strömungsverbindung steht. An seinem anderen Ende mündet der Ringraum 11 über einen erweiterten Ringraum 30 in einen sich durch den Innendeckel 18 erstreckenden Axialkanai31 aus.The two coaxial flow channels 10 and 11 extend through the bearing journal 20. The flow channel 10 is formed by an inner tube 26 which is fixed at one end in the rotary inlet 22 and is in flow connection with the medium inlet 23 thereof. The other end of the inner tube 26 is fixed in a central insert part 27 of the inner cover 18, which engages in a central opening in the outer cover 17. The flow channel 11 is formed by an annular space 28, which surrounds the inner tube 26 and is formed in the interior of the bearing pin 20 and which at one end extends into a corresponding annular space of the connecting pin 25 of the rotary lead-in 22 Connection pin 25 of the rotary inlet 22 continued and in this is in flow communication with the medium outlet 24 of the rotary inlet 22 via an enlarged annular space 29. At its other end, the annular space 11 opens out via an enlarged annular space 30 into an axial channel 31 extending through the inner cover 18.

Die im Innendeckel 18 ausmündenden Endbereiche der beiden Strömungskanäle 10 und 11 sind über je eine flexible Verbindungsleitung 32, 33 mit dem Zuflussende 12 bzw. dem Rückflussende 13 der Rohrschlange 5 verbunden, z.B. verschraubt. Die flexible Verbindungsleitung 32 verbindet dabei einen kurzen axialen Kanal 34 in Verlängerung einer zentralen Bohrung 35, in der das Innenrohr 26 festgelegt ist, mit dem inneren Mediumkanal 10. Die flexible Verbindungsleitung 33 ist ihrerseits an den axialen Durchgangskanal 31 des Innendeckels 18 angeschlossen.The end regions of the two flow channels 10 and 11 which open out in the inner cover 18 are each connected via a flexible connecting line 32, 33 to the inflow end 12 and the return flow end 13 of the pipe coil 5, e.g. screwed. The flexible connecting line 32 connects a short axial channel 34 in the extension of a central bore 35, in which the inner tube 26 is fixed, to the inner medium channel 10. The flexible connecting line 33 is in turn connected to the axial through channel 31 of the inner cover 18.

Der Innendeckel 18 weist im übrigen einen Randflansch 36 auf, mit dem er unter Zwischenlegung einer ringförmigen Dichtung 37 mit der Innenseite des Aussenrings 17 abdichtend verschraubt ist. Ferner ist der zentrale Einsatzteil 27 des Innenrings 18 in der Bohrung 35 mit einer ringförmigen Dichtung 38 versehen, die mit dem Aussenumfang des Innenrohrs 26 in Dichtungseingriff steht und dieses gegenüber dem Strömungskanal 11 abdichtet.The inner cover 18 also has an edge flange 36 with which it is screwed in a sealing manner with the interposition of an annular seal 37 with the inside of the outer ring 17. Furthermore, the central insert part 27 of the inner ring 18 in the bore 35 is provided with an annular seal 38 which is in sealing engagement with the outer circumference of the inner tube 26 and seals this against the flow channel 11.

Claims (10)

1. A roll for processing a flat material in the form of a web or ribbon, consisting ofacylinrdrical hollow body of metal in the cylinder wall of which a helical coil of pipe (5) of metal, through which a heating or cooling medium can flow, is cast integral, and the ends of which are closed by end closures comprising a passage for the piping for the flowing medium, characterised in thtat the metal of the pipe coil (5) has a distinctly higher melting temperature than the metal of the cast cylinder wall (2) so that the pipe coil (5) is rigidly connected to the metal of the cylinder wall (2) by shrinking engagement.
2. A roll according to Claim 1, characterised in that the cylinder wall (2) is formed by a centrifugally cast tube in the wall of which the pipe coil (5) is cast jointly.
3. A roll according to Claim 1 or 2, characterised in that the pipe coil (5) consists of steel or a steel alloy and the cylinder wall (2) consists of aluminium or an aluminium alloy.
4. A roll according to any one of the Claims 1 to 3, characterised in that one (3) of the two end closures (3, 4) comprises a bearing end (6) shutting off the associated end of the hollow body (1) as a whole and the other end closure (4) is constructed in the form of a bearing and connection end with the passage for the piping for the flowing medium.
5. A roll according to any one of the Claims 1 to 4, characterised in that the passage for the piping comprises two coaxial flow channels (10, 11) of which the one (10) is in flow communication with the inflow end (12) and the other (11) with the return-flow end (13), adjacent to the inflow end (12), of the pipe coil (5), the pipe coil (5) being provided with a return bend (14) in its region adjacent to the bearing end (6).
6. A roll according to Claim 4 or 5, characterised in that the bearing and connection end (4) comprises an outer cover (17) with an outer journal (20) which is connected to a rotary inlet (22), known per se and comprising a medium inlet and a medium outlet (23, 24), for the flowing medium and which contains the two coaxial flow channels (10,11).
7. A roll according to Claim 6, characterised in that the two coaxial flow channels (10, 11) are formed by an inner pipe (26) and an annular space (28) surrounding this and formed in the interior of the journal (20), both of which are connected, at one end, to the rotary inlet (22) and, at the other end, open into an inner cover (18) cooperating with the outer cover (17) to close the associated end of the hollow body (1).
8. A roll according to Claim 7, characterised in that the end regions of the two flow channels (10, 11) opening into the inner cover (18) are each connected, through a flexible connecting pipe (32, 33), to the inflow end (12) or the return-flow end (13) respectively of the pipe coil (5).
9. A roll according to Claim 7 or 8, characterised in that the inner cover (18) comprises a central insert member (27) engaging in the outer cover (17) and a margina flange (36) which is screwed, with a sealing action, to the inside of the outer ring (17), with the interposition of an annular seal (37).
10. A roll according to Claim 9, characterised in that the insert member (27) of the inner cover (18) is provided with an inner annular seal (38) in a central bore (35), which is in sealing engagement with the outer circumference of the inner pipe (26) and seals this off from the medium channel (11) surrounding the inner pipe (26).
EP85102805A 1984-03-24 1985-03-12 Roll for processing a flat web-like material Expired EP0156236B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85102805T ATE36179T1 (en) 1984-03-24 1985-03-12 ROLLER FOR PROCESSING WEB OR TAPE FLAT MATERIAL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8409106U 1984-03-24
DE8409106 1984-03-24

Publications (3)

Publication Number Publication Date
EP0156236A2 EP0156236A2 (en) 1985-10-02
EP0156236A3 EP0156236A3 (en) 1986-03-12
EP0156236B1 true EP0156236B1 (en) 1988-08-03

Family

ID=6765125

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85102805A Expired EP0156236B1 (en) 1984-03-24 1985-03-12 Roll for processing a flat web-like material

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US (2) US4683627A (en)
EP (1) EP0156236B1 (en)
JP (1) JPS60222610A (en)
AT (1) ATE36179T1 (en)
CA (1) CA1271655A (en)
DE (1) DE3564140D1 (en)

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DE3915278A1 (en) * 1989-05-10 1990-11-15 Hoechst Ag METHOD AND DEVICE FOR THE CONTINUOUS DRYING OF PLATES COATED ON BOTH SIDES
DE9000980U1 (en) * 1990-01-29 1990-05-10 Schwäbische Hüttenwerke GmbH, 73433 Aalen Roller for a smoothing unit or a calender
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US5156714A (en) * 1990-05-24 1992-10-20 United Container Machinery Group, Inc. Heater for a corrugating machine
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US5292298A (en) * 1993-01-06 1994-03-08 Roll Service Incorporated Heat transfer roll
DE19635845C1 (en) * 1996-09-04 1998-06-10 Voith Sulzer Finishing Gmbh Calender roller with a cover made of elastic plastic
US5760375A (en) * 1996-10-08 1998-06-02 Hall; Timothy G. Heated rollers
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Also Published As

Publication number Publication date
ATE36179T1 (en) 1988-08-15
EP0156236A3 (en) 1986-03-12
US4683627A (en) 1987-08-04
JPS60222610A (en) 1985-11-07
CA1271655A (en) 1990-07-17
US4711291A (en) 1987-12-08
DE3564140D1 (en) 1988-09-08
EP0156236A2 (en) 1985-10-02

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