EP2321453A2 - Method and device for heating a rotatably mounted guide casing of a guide roller - Google Patents

Method and device for heating a rotatably mounted guide casing of a guide roller

Info

Publication number
EP2321453A2
EP2321453A2 EP09782236A EP09782236A EP2321453A2 EP 2321453 A2 EP2321453 A2 EP 2321453A2 EP 09782236 A EP09782236 A EP 09782236A EP 09782236 A EP09782236 A EP 09782236A EP 2321453 A2 EP2321453 A2 EP 2321453A2
Authority
EP
European Patent Office
Prior art keywords
compressed air
guide
heated
guide roller
air
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
EP09782236A
Other languages
German (de)
French (fr)
Other versions
EP2321453B1 (en
Inventor
Claus Matthies
Tim LÜTJE
Ludger Legge
Friedrich Lennemann
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.)
Oerlikon Textile GmbH and Co KG
Original Assignee
Oerlikon Textile GmbH and Co KG
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 Oerlikon Textile GmbH and Co KG filed Critical Oerlikon Textile GmbH and Co KG
Publication of EP2321453A2 publication Critical patent/EP2321453A2/en
Application granted granted Critical
Publication of EP2321453B1 publication Critical patent/EP2321453B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J13/00—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J13/00—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass
    • D02J13/005—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass by contact with at least one rotating roll

Definitions

  • the invention relates to a method for heating a rotatably mounted guide sleeve of a guide roller for guiding and heating threads according to the preamble of claim 1 and to an apparatus for carrying out the method according to the preamble of claim 6.
  • the godet In the production and further processing of synthetic threads, it is generally known to lay one or more threads with multiple wrapping around a driven godet shell of a godet, so that the thread or threads are promoted due to a belt friction by the driven godet shell.
  • the godet In order to enable multiple wrapping on a godet jacket, the godet usually has a guide roller assigned to it, which has a rotatably mounted guide casing for receiving the thread windings.
  • a guide roller assigned to it, which has a rotatably mounted guide casing for receiving the thread windings.
  • the known guide roller has a rotatably mounted guide sheath, which is rotatably supported by an air bearing on an axle.
  • the heater is associated with a plurality of heating means to heat the guide sheath and a guided on the guide sheath thread.
  • the axis carrier In the known leadership role, it is necessary that the energy from the center of the guide roller in this case, the axis carrier must be passed to the outer guide sheath for heating the guide sheath.
  • the formed between the guide sheath and the axle air bearing is a thermal resistance, which leads to corresponding energy losses. Therefore, relatively high temperatures have to be generated on the axle carrier to erhit- example, the guide coat on an outside temperature of 100 0 C. Zen. However, such warming in the axle carrier lead to heat deformation, which form unfavorable to the air storage.
  • the known leadership role is thus energetically very unfavorable to heat the guide sheath to a desired surface temperature.
  • Another object of the invention is to provide a method and apparatus for heating a rotatably mounted guide sleeve of a guide roller suitable for retrofitting an unheated guide roller to heat the guide sheath.
  • This object is achieved for a method according to the invention in that a compressed air is heated and that the heated compressed air is fed to the air bearing.
  • the solution of the problem is given by the fact that the compressed air line outside the guide roller is assigned a heating means by which a compressed air can be heated.
  • the invention is based on the finding that, in the case of an air bearing, the compressed air fed in between the rotating component and the stationary component is also suitable as a sliding medium in the heated state.
  • the compressed air can be used advantageously as a heat carrier to a heat energy directly to guide the guide sheath.
  • the compressed air cushion generated for the storage of the guide casing can also be advantageously produced with the heated compressed air.
  • the invention is thus characterized by the fact that no additional devices for heating the guide casing are required on the guide roller.
  • the compressed air is heated outside the guide roller by a heating medium.
  • the heating of the compressed air is thus flexible executable.
  • the compressed air can be heated directly inside a compressed air line by external heating media assigned to the compressed air line.
  • the compressed air is heated in a separate compressed air heater by the compressed air is supplied from a compressed air source to the compressed air heater.
  • the electric compressed air heater is connected in the compressed air line between the pressure source and a compressed air connection of the guide roller. This makes it possible to buffer the compressed air, which enables intensive heating.
  • the development of the invention is preferably used, in which the compressed air is heated to a desired temperature, an actual temperature of the compressed air is detected and the heating of the compressed air in response to a deviation between the target temperature and the actual temperature is regulated.
  • a heating control is associated with the heating means, which is connected to a temperature sensor for detecting an actual temperature of the heated compressed air. This makes it possible to ensure that a predetermined surface temperature can be generated on the guide casing, which is kept substantially constant throughout the operating time.
  • the development of the invention is particularly advantageous, in which the heated compressed air is distributed within the guide roller by a porous sliding jacket in an air gap of the air bearing.
  • a porous sliding jacket in an air gap of the air bearing.
  • the porous sliding jacket is held on the circumference of the axle carrier, on which at least one annular chamber connected to the compressed air connection is formed.
  • the air gap between the guide casing and the porous sliding jacket, the heated compressed air over the entire, extending in the axial direction bearing length is supplied.
  • This development of the invention is characterized in particular by the fact that intensive heating of the guide jacket by the heated compressed air is possible.
  • surface temperatures can be achieved on the guide sheath in the range of 200 0 C and above.
  • the development of the invention according to claim 5 and claim 11 is particularly advantageous.
  • the heated compressed air within the guide roller is distributed through several nozzle bores in the air gap of the air bearing.
  • the nozzle openings are advantageously formed directly on the axle, and connected to the compressed air connection.
  • the air bearing is formed by an air gap between the guide casing and the axle.
  • the invention is particularly suitable for guiding and heating one or more threads within a manufacturing process or a further processing process.
  • the use according to the invention in a melt spinning device in which one or more threads are guided, heated and drawn through a plurality of godets, represents a particular advantage in order to allow continuous heating of the threads when the godets are looped around several times.
  • the threads are heated alternately on multiple wraps on the heated surface of the godet shell and the heated surface of the guide roller.
  • a cooling phase as usual in conventional guide rollers in the prior art, no longer occurs.
  • the use of the erf ⁇ ndungswashen device is particularly advantageous in which a godet godet of the galette and the guide sheath of the guide roller are heated to an equal surface temperature.
  • the invention can be used in particular for high yarn speeds in the range of 4,000 m / min and above, for example, to draw a plurality of yarns in a melt spinning process.
  • Fig. 1 shows schematically a sectional view of a first embodiment of the device according to the invention for carrying out the method according to the invention
  • Fig. 2 shows schematically a sectional view of another embodiment of the device according to the invention for carrying out the method according to the invention erfmdungsgemä- sen
  • Fig. 3 shows schematically a view of a melt spinning device for use of a device according to the invention
  • a guide roller 1 is shown in a cross-sectional view.
  • the guide roller 1 has a rotatably mounted guide casing 2.
  • the guide casing 2 is formed for this purpose a hollow cylinder.
  • the guide casing 2 is held on an axle carrier 3, which is fastened with a frame end 13 to a machine frame (not shown here).
  • the frame end 13 protrudes from the guide casing 2 at an end face of the guide roller 1.
  • the axle carrier 3 extends essentially over the entire length of the guide casing 2, wherein an air bearing 4 is formed between the guide casing 2 and the axle casing 3 penetrating the guide casing 2.
  • a sliding jacket 7 is arranged to form the air bearing 4 on the circumference of the axle beam 3.
  • the sliding skirt 7 is formed from a porous material, for example an open-pore sintered metal or an open-pored sintered carbon.
  • two adjacent annular chambers 6.1 and 6.2 are formed on the circumference of the axle carrier 3 on the circumference.
  • the annular chambers 6.1 and 6.2 are connected by a plurality of radially extending in the axle 3 distribution holes 10 with a compressed air channel 9.
  • the compressed air channel 9 is formed in the central region of the axle carrier 3 and opens at the frame end 13 in a compressed air connection eighth
  • the sliding shell 7 forms with the guide casing 2 a circumferential air gap 5, so that a via the annular chamber 6.1 and 6.2 the sliding jacket 7 supplied compressed air is passed through the porous material of the sliding jacket 7 and on the mantle surface of the sliding shell 7 uniformly enters the air gap 5.
  • two stop rings 11.1 and 11.2 are respectively associated with the ends of the guide casing 2.
  • the thrust rings 11.1 and 11.2 are each rotatably connected to the guide casing 2.
  • the thrust rings 11.1 and 11.2 are fastened to the guide casing 2 in relation to the ends of the sliding skirt 7, so that radial gaps 12.1 and 12.2 are formed between the front ends of the sliding skirt 7 and the thrust rings 11.1 and 11.2.
  • the thrust rings 11.1 and 11.2 each have openings in the middle region, which produce a connection of the radial gaps 12.1 and 12.2 with the environment.
  • the compressed air supplied to the air bearing 4 in the air gap 5 compressed air is supplied via the compressed air port 8 of the guide roller 1.
  • the compressed air connection 8 is connected via a compressed air line 15 to a compressed air source 16.
  • the compressed air line 15 is assigned a heating means 14 in order to heat the compressed air supplied to the compressed air connection 8 compressed air.
  • the heating means 14 is formed by a heating coil 17, which heats the compressed air line and the compressed air therein.
  • the heating coil 17 is associated with a heating control 18, which is connected to a temperature sensor 19.
  • the temperature sensor 19 is assigned to the compressed air line 15 immediately before the inlet into the compressed air connection 8.
  • a thread or several parallel juxtaposed threads is performed with a Operaumschlingung in the operating state on the circumference of the guide shell 2 of the guide roller 1.
  • the guide casing 2 is driven by the thread or threads for rotation.
  • compressed air is continuously supplied via the compressed air source 16 in order to be supplied to the compressed air connection 8 via the compressed air line 15.
  • the compressed air is heated by the heating coil 17 to a predetermined target temperature before entering the guide roller 1.
  • the heated compressed air then passes via the compressed air connection 8 in the compressed air channel 9 of the axle carrier 3 and is supplied via the distribution holes 10 to the annular chambers 6.1 and 6.2.
  • the heated compressed air penetrates the sliding shell 7 and occurs on the mantle surface of the sliding jacket 7 continuously in the air gap 5 a.
  • an air cushion is formed between the guide casing 2 and the sliding skirt 7, which extends substantially over the entire length of the air gap 5.
  • the guide casing 2 is heated so that a required and predefined surface temperature for the yarn treatment is established on the outer circumference of the guide casing 2.
  • the heated compressed air supplied continuously to the air gap 5 then passes through the radial gaps 12. 1 and 12. 2 into the vicinity of the guide roller. Ie 1. In addition to the storage of the guide casing 2 so that a continuous temperature control of the guide casing 2 is achieved simultaneously.
  • the heating coil 17 is assigned a heating control 18.
  • the heating control 18 is connected to a temperature sensor 19, which continuously detects the temperature of the compressed air, which is introduced into the compressed air channel 9 of the axle carrier 3. In the event that a deviation between a predetermined desired temperature of the compressed air and a measured actual temperature of the compressed air is detected within the heating control 18, a control of the heating coil 17 takes place. Thus, a temperature control can be established which is a constant compressed air temperature guaranteed.
  • FIG. 2 a second embodiment of the device according to the invention is shown schematically.
  • the embodiment is substantially identical in construction and in function to the aforementioned embodiment, so that at this point only the differences will be explained and otherwise reference is made to the above description.
  • the components have been given the same reference numerals.
  • the guide casing 2 of the guide roller 1 is mounted directly on the axle carrier 3.
  • the axle carrier 3 has a bearing section 31, which is connected at one end face to the smaller frame end 13 in the diameter.
  • a plurality of uniformly distributed nozzle openings 22 are formed.
  • the nozzle openings 22 are connected via nozzle bores 21 with radially extending distribution holes 10, which open into a central compressed air channel 9.
  • the compressed air channel 9 is connected to the frame end 13 with the compressed air connection 8.
  • the air storage 4 is formed by the radially encircling air gap 5 between the axle 3 and the guide casing 2.
  • the air gap 5 extends in axial direction over the length of the bearing portion 31 of the axle beam 3, wherein at both ends of the bearing portion 31 of the guide casing 2, the stop rings 11.1 and 11.2.
  • the radial gaps 12.1 and 12.2, which extend radially at the end sides of the bearing section 31, form between the axle carrier 3 and the thrust rings 11.1 and 11.2.
  • the compressed air supply takes place in this embodiment by a compressed air source 16 and connected to the compressed air source 16 and the compressed air connection 8 compressed air line 15.
  • compressed air heater 20 is connected to perform a heating of the compressed air.
  • a temperature sensor 19 is provided, which is assigned to the compressed air channel 9 within the axle carrier 3.
  • the temperature sensor 19 is connected to the heating controller 18, which is coupled to the compressed air heater 20 for control.
  • FIGS. 1 and 2 are exemplary in the design of the guide roller 1 and in particular in the construction of the air bearing 4. It is essential here that the air bearing 4 supplied compressed air can be heated by a heating means arranged outside the guide roller.
  • the invention is particularly suitable for retrofitting already installed in machine guide rollers with cold leadership coats, so that the compressed air used for air storage of the guide roller is supplied in the heated state.
  • the invention can be used particularly advantageously in melt spinning devices in which freshly extruded filaments are passed through godet systems, heated and drawn.
  • Fig. 3 an embodiment of such a melt spinning device is shown schematically in a view. In this case, only the components of a melt spinning device which are essential for the use of the device according to the invention are shown.
  • the melt spinning device has a spinner head 23 which carries a spinneret 24 on its underside.
  • the spinning head 23 is connected via a melt inlet 32 with a melt source.
  • a cooling shaft 25 and a godet system with a withdrawal godet unit 27 and a draw godet unit 28 are arranged.
  • the withdrawal godet unit 27 is formed by a godet 29.1 and a cold guide roll 30.
  • the godet 29. 1 has a heated godet jacket 33.
  • the downstream draw godet unit 28 is formed by a second driven godet 29.2 and a non-driven heated guide roll 1.
  • the guide roller 1 is associated with a compressed air source 16 and a compressed air heater 20, so that the guide roller 1 according to the embodiment of FIG. 1 or 2 has a heated guide casing 2.
  • the godet casing 33 of the second godet 29.2 is also heated.
  • a yarn 34 is spun from a polymer melt.
  • the polymer melt is extruded through the spinneret 24 into a plurality of filaments, which are combined as a filament bundle 26 after cooling.
  • the deduction of the filament bundle 26 from the spinneret 4 is made by the Abg- gsgalettentician 27.
  • the Abzugsgalettentician 27 is wrapped around the thread 34 several times.
  • the thread 34 is heated to be drawn by withdrawal by means of the draw godet unit 28.
  • the thread 34 is likewise guided with multiple wrapping, the thread being heated for thermal aftertreatment on the surface of the heated godet casing 33 and on the surface of the heated guide casing 2 of the guide roll 1. Subsequently, the thread is wound into a bobbin or further treated, for example crimped to produce a carpet yarn.
  • the surface temperature set on the godet casing 33 and on the guide casing 2 is preferably set equal to heat the yarn 34.
  • the surface temperature in the range of 200 0 C could be.
  • take-off godet unit 27 with a driven galette and heated godet casing with the device according to the invention.
  • This embodiment is shown in dashed lines in Fig. 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Rolls And Other Rotary Bodies (AREA)

Abstract

The invention relates to a method and to a device for heating a rotatably mounted guide casing of a guide roller for guiding and heating threads. The guide roller has a guide casing which is held by means of an air mounting on the circumference of a shaft carrier. To heat the guide casing, compressed air is heated outside the guide roller and supplied to the air mounting within the guide roller.

Description

Verfahren und Vorrichtung zum Beheizen eines drehbar gelagerten Führungsmantels einer Führungsrolle Method and device for heating a rotatably mounted guide sleeve of a guide roller
Die Erfindung betrifft ein Verfahren zum Beheizen eines drehbar gelagerten Führungsmantels einer Führungsrolle zum Führen und Erwärmen von Fäden gemäß dem Oberbegriff des Anspruchs 1 sowie eine Vorrichtung zur Durchführung des Verfahrens gemäß dem Oberbegriff des Anspruchs 6.The invention relates to a method for heating a rotatably mounted guide sleeve of a guide roller for guiding and heating threads according to the preamble of claim 1 and to an apparatus for carrying out the method according to the preamble of claim 6.
Bei der Herstellung und Weiterverarbeitung von synthetischen Fäden ist es allgemein bekannt, einen oder mehrere Fäden mit mehrfacher Umschlingung um einen angetriebenen Galettenmantel einer Galette zu legen, so dass der Faden oder die Fäden aufgrund einer Umschlingungsreibung durch den angetriebenen Galettenmantel gefördert werden. Um die Mehrfachumschlingung an einem Galettenman- tel zu ermöglichen, ist der Galette üblicherweise eine Führungsrolle zugeordnet, die einen drehbar gelagerten Führungsmantel zur Aufnahme der Fadenumschlin- gungen besitzt. Eine derartige Führungsrolle ist beispielsweise aus der DE 26 39 439 bekannt.In the production and further processing of synthetic threads, it is generally known to lay one or more threads with multiple wrapping around a driven godet shell of a godet, so that the thread or threads are promoted due to a belt friction by the driven godet shell. In order to enable multiple wrapping on a godet jacket, the godet usually has a guide roller assigned to it, which has a rotatably mounted guide casing for receiving the thread windings. Such a leadership role is known for example from DE 26 39 439.
Die bekannte Führungsrolle weist einen drehbar gelagerten Führungsmantel auf, der durch eine Luftlagerung an einem Achsträger drehbar gehalten ist. Dem Achsträger sind mehrere Heizmittel zugeordnet, um den Führungsmantel und einen am Führungsmantel geführten Faden zu erwärmen.The known guide roller has a rotatably mounted guide sheath, which is rotatably supported by an air bearing on an axle. The heater is associated with a plurality of heating means to heat the guide sheath and a guided on the guide sheath thread.
Bei der bekannten Führungsrolle ist es erforderlich, dass zur Erwärmung des Führungsmantels die Energie vom Zentrum der Führungsrolle in diesem Fall dem Achsträger zum äußeren Führungsmantel geleitet werden muss. Die zwischen dem Führungsmantel und dem Achsträger ausgebildete Luftlagerung stellt dabei einen Wärmewiderstand dar, der zu entsprechenden Energieverlusten führt. Daher müssen an dem Achsträger relativ hohe Temperaturen erzeugt werden, um beispielsweise den Führungsmantel auf einer Außentemperatur von 1000C zu erhit- zen. Derartige Erwärmungen in dem Achsträger fuhren jedoch zu Wärmeverformungen, die sich ungünstig auf die Luftlagerung ausbilden. Die bekannte Führungsrolle ist somit energetisch sehr ungünstig, um den Führungsmantel auf eine gewünschte Oberflächentemperatur zu erwärmen.In the known leadership role, it is necessary that the energy from the center of the guide roller in this case, the axis carrier must be passed to the outer guide sheath for heating the guide sheath. The formed between the guide sheath and the axle air bearing is a thermal resistance, which leads to corresponding energy losses. Therefore, relatively high temperatures have to be generated on the axle carrier to erhit- example, the guide coat on an outside temperature of 100 0 C. Zen. However, such warming in the axle carrier lead to heat deformation, which form unfavorable to the air storage. The known leadership role is thus energetically very unfavorable to heat the guide sheath to a desired surface temperature.
Es ist daher Aufgabe der Erfindung ein Verfahren und eine Vorrichtung zum Beheizen eines drehbar gelagerten Führungsmantels einer Führungsrolle zu schaffen, bei welcher die Wärmeenergie möglichst unmittelbar den Führungsmantel zuführbar ist.It is therefore an object of the invention to provide a method and a device for heating a rotatably mounted guide sleeve of a guide roller, wherein the heat energy as directly as possible, the guide sheath can be fed.
Ein weiteres Ziel der Erfindung liegt darin, ein Verfahren und eine Vorrichtung zum Beheizen eines drehbar gelagerten Führungsmantels einer Führungsrolle bereitzustellen, das bzw. die zur Nachrüstung einer unbeheizten Führungsrolle geeignet sind, um den Führungsmantel beheizen zu können.Another object of the invention is to provide a method and apparatus for heating a rotatably mounted guide sleeve of a guide roller suitable for retrofitting an unheated guide roller to heat the guide sheath.
Diese Aufgabe wird für ein Verfahren erfindungsgemäß dadurch gelöst, dass eine Druckluft erwärmt wird und dass die erwärmte Druckluft der Luftlagerung zugeführt wird.This object is achieved for a method according to the invention in that a compressed air is heated and that the heated compressed air is fed to the air bearing.
Bei der erfindungsgemäßen Vorrichtung zur Durchführung des erfindungsgemäßen Verfahrens ist die Lösung der Aufgabe dadurch gegeben, dass der Druckluftleitung außerhalb der Führungsrolle ein Heizmittel zugeordnet ist, durch welches eine Druckluft beheizbar ist.In the apparatus according to the invention for carrying out the method according to the invention, the solution of the problem is given by the fact that the compressed air line outside the guide roller is assigned a heating means by which a compressed air can be heated.
Vorteilhafte Weiterbildungen der Erfindungen sind durch die Merkmale und Merkmalskombinationen der jeweiligen Unteransprüche definiert.Advantageous developments of the inventions are defined by the features and feature combinations of the respective subclaims.
Der Erfindung liegt die Erkenntnis zugrunde, dass bei einer Luftlagerung die zwischen dem rotierenden Bauteil und dem stehenden Bauteil eingespeiste Druckluft auch im erhitzten Zustand als Gleitmedium geeignet ist. Insoweit lässt sich die Druckluft vorteilhaft als Wärmeträger nutzen, um eine Wärmeenergie unmittelbar dem Führungsmantel zuzuleiten. Das für die Lagerung des Führungsmantels erzeugte Druckluftpolster lässt sich auch vorteilhaft mit der erhitzten Druckluft erzeugen. Die Erfindung zeichnet sich somit dadurch aus, dass an der Führungsrolle keine zusätzlichen Einrichtungen zur Beheizung des Führungsmantels erforderlich sind. Die Druckluft wird außerhalb der Führungsrolle durch ein Heizmittel beheizt. Die Beheizung der Druckluft ist somit flexibel ausführbar. So lässt sich die Druckluft beispielsweise unmittelbar innerhalb einer Druckluftleitung durch äußere der Druckluftleitung zugeordnete Heizmedien beheizen.The invention is based on the finding that, in the case of an air bearing, the compressed air fed in between the rotating component and the stationary component is also suitable as a sliding medium in the heated state. In that regard, the compressed air can be used advantageously as a heat carrier to a heat energy directly to guide the guide sheath. The compressed air cushion generated for the storage of the guide casing can also be advantageously produced with the heated compressed air. The invention is thus characterized by the fact that no additional devices for heating the guide casing are required on the guide roller. The compressed air is heated outside the guide roller by a heating medium. The heating of the compressed air is thus flexible executable. For example, the compressed air can be heated directly inside a compressed air line by external heating media assigned to the compressed air line.
Besonders vorteilhaft ist jedoch die Weiterbildung der Erfindung, bei welcher die Druckluft in einem separaten Druckluftheizer erhitzt wird, indem die Druckluft aus einer Druckluftquelle dem Druckluftheizer zugeführt wird. Hierzu ist der elektrische Druckluftheizer in der Druckluftleitung zwischen der Druckquelle und einem Druckluftanschluss der Führungsrolle geschaltet. Damit lässt sich eine Puf- ferung der Druckluft realisieren, die eine intensive Beheizung ermöglicht.Particularly advantageous, however, is the development of the invention, in which the compressed air is heated in a separate compressed air heater by the compressed air is supplied from a compressed air source to the compressed air heater. For this purpose, the electric compressed air heater is connected in the compressed air line between the pressure source and a compressed air connection of the guide roller. This makes it possible to buffer the compressed air, which enables intensive heating.
Unabhängig von der Ausgestaltung des Heizmittels ist die Weiterbildung der Erfindung bevorzugt verwendet, bei welcher die Druckluft auf eine Soll-Temperatur erhitzt wird, eine Ist-Temperatur der Druckluft erfasst wird und die Erhitzung der Druckluft in Abhängigkeit von einer Abweichung zwischen der Soll-Temperatur und der Ist-Temperatur geregelt wird. Hierzu ist dem Heizmittel eine Heizsteuerung zugeordnet, welche mit einem Temperatursensor zur Erfassung einer Ist- Temperatur der erhitzten Druckluft verbunden ist. Damit lässt sich sicherstellen, dass an dem Führungsmantel eine vorbestimmte Oberflächentemperatur erzeugbar ist, die während der gesamten Betriebsdauer wesentlich konstant gehalten wird.Regardless of the design of the heating means, the development of the invention is preferably used, in which the compressed air is heated to a desired temperature, an actual temperature of the compressed air is detected and the heating of the compressed air in response to a deviation between the target temperature and the actual temperature is regulated. For this purpose, a heating control is associated with the heating means, which is connected to a temperature sensor for detecting an actual temperature of the heated compressed air. This makes it possible to ensure that a predetermined surface temperature can be generated on the guide casing, which is kept substantially constant throughout the operating time.
Um eine gleichmäßige Verteilung der Druckluft am Umfang des Führungsmantels innerhalb des Luftspaltes zu erhalten, ist die Weiterbildung der Erfindung besonders vorteilhaft, bei welcher die erwärmte Druckluft innerhalb der Führungsrolle durch einen porösen Gleitmantel in einem Luftspalt der Luftlagerung verteilt wird. Damit lässt sich der hohlzylindrische Führungsmantel im Innenbereich im Wesentlichen über die gesamte Länge mit der erhitzten Druckluft umspülen. Hierzu ist der poröse Gleitmantel am Umfang des Achsträgers gehalten, an welchem zumindest eine mit dem Druckluftanschluss verbundene Ringkammer ausgebildet ist. Dem Luftspalt zwischen dem Führungsmantel und den porösen Gleitmantel wird die erhitzte Druckluft über die gesamte, in axialer Richtung erstreckende Lagerlänge zugeführt. Diese Weiterbildung der Erfindung zeichnet sich dadurch besonders aus, dass eine intensive Beheizung des Führungsmantels durch die erhitzte Druckluft möglich ist. So können Oberflächentemperaturen an dem Führungsmantel im Bereich von 2000C und darüber erreicht werden.In order to obtain a uniform distribution of the compressed air at the periphery of the guide casing within the air gap, the development of the invention is particularly advantageous, in which the heated compressed air is distributed within the guide roller by a porous sliding jacket in an air gap of the air bearing. This allows the hollow cylindrical guide sheath in the interior Thoroughly rinse over the entire length with the heated compressed air. For this purpose, the porous sliding jacket is held on the circumference of the axle carrier, on which at least one annular chamber connected to the compressed air connection is formed. The air gap between the guide casing and the porous sliding jacket, the heated compressed air over the entire, extending in the axial direction bearing length is supplied. This development of the invention is characterized in particular by the fact that intensive heating of the guide jacket by the heated compressed air is possible. Thus, surface temperatures can be achieved on the guide sheath in the range of 200 0 C and above.
Bei herkömmlichen Luftlagerungen, bei welchen die Druckluft über Düsenöffnungen direkt in den Luftspalt der Luftlagerung fließt, ist die Weiterbildung der Erfindung gemäß Anspruch 5 und Anspruch 11 besonders vorteilhaft. Hierbei wird die erwärmte Druckluft innerhalb der Führungsrolle durch mehrere Düsen- bohrungen in dem Luftspalt der Luftlagerung verteilt. Die Düsenöffnungen sind vorteilhaft unmittelbar an dem Achsträger ausgebildet, und mit dem Druckluftanschluss verbunden. Dabei wird die Luftlagerung durch einen Luftspalt zwischen dem Führungsmantel und dem Achsträger gebildet.In conventional air bearings, in which the compressed air flows through nozzle openings directly into the air gap of the air bearing, the development of the invention according to claim 5 and claim 11 is particularly advantageous. In this case, the heated compressed air within the guide roller is distributed through several nozzle bores in the air gap of the air bearing. The nozzle openings are advantageously formed directly on the axle, and connected to the compressed air connection. The air bearing is formed by an air gap between the guide casing and the axle.
Die Erfindung ist besonders geeignet, um ein oder mehrere Fäden innerhalb eines Herstellungsprozesses oder eines Weiterverarbeitungsprozesses zu führen und zu erwärmen. Die erfindungsgemäße Verwendung in einer Schmelzspinneinrichtung, bei welcher ein oder mehrere Fäden durch mehrere Galetten geführt, erwärmt und verstreckt werden, stellt einen besonderen Vorteil dar, um bei mehrfacher Um- schlingung der Galetten eine kontinuierliche Erwärmung der Fäden zu ermöglichen. Die Fäden werden hierzu bei mehrfacher Umschlingung abwechselnd an der beheizten Oberfläche des Galettenmantels und der beheizten Oberfläche der Führungsrolle erwärmt. Eine Abkühlphase, wie im Stand der Technik bei herkömmlichen Führungsrollen üblich, tritt nicht mehr ein.The invention is particularly suitable for guiding and heating one or more threads within a manufacturing process or a further processing process. The use according to the invention in a melt spinning device, in which one or more threads are guided, heated and drawn through a plurality of godets, represents a particular advantage in order to allow continuous heating of the threads when the godets are looped around several times. For this purpose, the threads are heated alternately on multiple wraps on the heated surface of the godet shell and the heated surface of the guide roller. A cooling phase, as usual in conventional guide rollers in the prior art, no longer occurs.
- A - Somit ist die Verwendung der erfϊndungsgemäßen Vorrichtung besonders vorteilhaft, bei welcher ein Galettenmantel der Galette und der Führungsmantel der Führungsrolle auf eine gleich hohe Oberflächentemperatur beheizt sind.- A - Thus, the use of the erfϊndungsgemäßen device is particularly advantageous in which a godet godet of the galette and the guide sheath of the guide roller are heated to an equal surface temperature.
Aufgrund der hohen Drehzahlen und geringen Laufwiderstände der luftgelagerten Führungsrollen ist die Erfindung insbesondere auch für hohe Fadengeschwindigkeiten im Bereich von 4.000 m/min und darüber einsetzbar, um beispielsweise mehrere Fäden in einem Schmelzspinnprozess zu verstrecken.Due to the high rotational speeds and low running resistance of the air-bearing guide rollers, the invention can be used in particular for high yarn speeds in the range of 4,000 m / min and above, for example, to draw a plurality of yarns in a melt spinning process.
Die Erfindung wird nachfolgend unter Bezug einiger Ausführungsbeispiele der erfindungsgemäßen Vorrichtung gemäß den beigefügten Figuren näher erläutert.The invention will be explained in more detail below with reference to some embodiments of the device according to the invention in accordance with the attached figures.
Es stellen dar:They show:
Fig. 1 schematisch eine Schnittansicht eines ersten Ausführungsbeispiels der erfindungsgemäßen Vorrichtung zur Durchführung des erfindungsgemäßen VerfahrensFig. 1 shows schematically a sectional view of a first embodiment of the device according to the invention for carrying out the method according to the invention
Fig. 2 schematisch eine Schnittansicht eines weiteren Ausführungsbeispiels der erfindungsgemäßen Vorrichtung zur Durchführung des erfmdungsgemä- ßen VerfahrensFig. 2 shows schematically a sectional view of another embodiment of the device according to the invention for carrying out the method according to the invention erfmdungsgemä- sen
Fig. 3 schematisch eine Ansicht einer Schmelzspinneinrichtung zur Verwendung einer erfindungsgemäßen VorrichtungFig. 3 shows schematically a view of a melt spinning device for use of a device according to the invention
In Fig. 1 ist ein erstes Ausführungsbeispiel der erfindungsgemäßen Vorrichtung zur Durchführung des erfindungsgemäßen Verfahrens dargestellt. In dem Ausführungsbeispiel nach Fig. 1 ist eine Führungsrolle 1 in einer Querschnittsansicht gezeigt. Die Führungsrolle 1 weist einen drehbar gelagerten Führungsmantel 2 auf. Der Führungsmantel 2 ist hierzu hohlzylindrisch ausgebildet. Der Führungsmantel 2 ist an einem Achsträger 3 gehalten, der mit einem Gestellende 13 an ei- nem hier nicht dargestellten Maschinengestell befestigt ist. Das Gestellende 13 ragt an einer Stirnseite der Führungsrolle 1 aus dem Führungsmantel 2 hervor. Der Achsträger 3 erstreckt sich im Wesentlichen über die gesamt Länge des Führungsmantels 2, wobei zwischen dem Führungsmantel 2 und dem den Führungsmantel 2 durchdringenden Achsträger 3 eine Luftlagerung 4 ausgebildet ist.In Fig. 1, a first embodiment of the device according to the invention for carrying out the method according to the invention is shown. In the embodiment of Fig. 1, a guide roller 1 is shown in a cross-sectional view. The guide roller 1 has a rotatably mounted guide casing 2. The guide casing 2 is formed for this purpose a hollow cylinder. The guide casing 2 is held on an axle carrier 3, which is fastened with a frame end 13 to a machine frame (not shown here). The frame end 13 protrudes from the guide casing 2 at an end face of the guide roller 1. The axle carrier 3 extends essentially over the entire length of the guide casing 2, wherein an air bearing 4 is formed between the guide casing 2 and the axle casing 3 penetrating the guide casing 2.
In diesem Ausführungsbeispiel ist zur Bildung der Luftlagerung 4 am Umfang des Achsträgers 3 ein Gleitmantel 7 angeordnet. Der Gleitmantel 7 ist aus einem porösen Material beispielsweise einem offenporigen Sintermetall oder eine offenporige Sinterkohle gebildet. In dem Überdeckungsbereich zwischen dem Gleitmantel 7 und dem Achsträger 3 sind am Umfang zwei nebeneinander liegende Ring- kammern 6.1 und 6.2 an dem Umfang des Achsträgers 3 ausgebildet. Die Ringkammern 6.1 und 6.2 sind durch mehrere radial in dem Achsträger 3 verlaufende Verteilbohrungen 10 mit einem Druckluftkanal 9 verbunden. Der Druckluftkanal 9 ist im mittleren Bereich des Achsträgers 3 ausgebildet und mündet an dem Gestellende 13 in einen Druckluftanschluss 8.In this embodiment, a sliding jacket 7 is arranged to form the air bearing 4 on the circumference of the axle beam 3. The sliding skirt 7 is formed from a porous material, for example an open-pore sintered metal or an open-pored sintered carbon. In the overlapping area between the sliding jacket 7 and the axle carrier 3, two adjacent annular chambers 6.1 and 6.2 are formed on the circumference of the axle carrier 3 on the circumference. The annular chambers 6.1 and 6.2 are connected by a plurality of radially extending in the axle 3 distribution holes 10 with a compressed air channel 9. The compressed air channel 9 is formed in the central region of the axle carrier 3 and opens at the frame end 13 in a compressed air connection eighth
Der Gleitmantel 7 bildet mit dem Führungsmantel 2 einen umlaufenden Luftspalt 5, so dass eine über die Ringkammer 6.1 und 6.2 dem Gleitmantel 7 zugeführte Druckluft durch das poröse Material des Gleitmantels 7 geleitet wird und an der Manteloberfläche des Gleitmantels 7 gleichmäßig in den Luftspalt 5 eintritt.The sliding shell 7 forms with the guide casing 2 a circumferential air gap 5, so that a via the annular chamber 6.1 and 6.2 the sliding jacket 7 supplied compressed air is passed through the porous material of the sliding jacket 7 and on the mantle surface of the sliding shell 7 uniformly enters the air gap 5.
Zur axialen Fixierung des Führungsmantels 2 an dem Achsträger 3 sind den Enden des Führungsmantels 2 jeweils zwei Anlaufringe 11.1 und 11.2 zugeordnet. Die Anlaufringe 11.1 und 11.2 sind jeweils drehfest mit dem Führungsmantel 2 verbunden. Die Anlaufringe 11.1 und 11.2 sind derart in Relation zu den Stirnen- den des Gleitmantels 7 an dem Führungsmantel 2 befestigt, so dass sich jeweils zwischen den Stirnenden des Gleitmantels 7 und den Anlaufringen 11.1 und 11.2 Radialspalte 12.1 und 12.2 ausbilden. Die Anlaufringe 11.1 und 11.2 weisen im mittleren Bereich jeweils Öffnungen auf, die eine Verbindung der Radialspalte 12.1 und 12.2 mit der Umgebung herstellen. Die zur Luftlagerung 4 in den Luftspalt 5 zugeführte Druckluft wird über den Druckluftanschluss 8 der Führungsrolle 1 zugeführt. Der Druckluftanschluss 8 ist über eine Druckluftleitung 15 mit einer Druckluftquelle 16 verbunden. Der Druckluftleitung 15 ist ein Heizmittel 14 zugeordnet, um die den Druckluftan- Schluss 8 zugeführte Druckluft zu erhitzen. In diesem Ausführungsbeispiel ist das Heizmittel 14 durch eine Heizspirale 17 gebildet, die die Druckluftleitung und die darin geführte Druckluft erhitzt. Der Heizspirale 17 ist eine Heizsteuerung 18 zugeordnet, die mit einem Temperatursensor 19 verbunden ist. Der Temperatursensor 19 ist der Druckluftleitung 15 unmittelbar vor Einlass in den Druckluft- anschluss 8 zugeordnet.For axial fixation of the guide casing 2 on the axle carrier 3, two stop rings 11.1 and 11.2 are respectively associated with the ends of the guide casing 2. The thrust rings 11.1 and 11.2 are each rotatably connected to the guide casing 2. The thrust rings 11.1 and 11.2 are fastened to the guide casing 2 in relation to the ends of the sliding skirt 7, so that radial gaps 12.1 and 12.2 are formed between the front ends of the sliding skirt 7 and the thrust rings 11.1 and 11.2. The thrust rings 11.1 and 11.2 each have openings in the middle region, which produce a connection of the radial gaps 12.1 and 12.2 with the environment. The compressed air supplied to the air bearing 4 in the air gap 5 compressed air is supplied via the compressed air port 8 of the guide roller 1. The compressed air connection 8 is connected via a compressed air line 15 to a compressed air source 16. The compressed air line 15 is assigned a heating means 14 in order to heat the compressed air supplied to the compressed air connection 8 compressed air. In this embodiment, the heating means 14 is formed by a heating coil 17, which heats the compressed air line and the compressed air therein. The heating coil 17 is associated with a heating control 18, which is connected to a temperature sensor 19. The temperature sensor 19 is assigned to the compressed air line 15 immediately before the inlet into the compressed air connection 8.
Bei der in Fig. 1 dargestellten Vorrichtung wird im Betriebszustand an dem Umfang des Führungsmantels 2 der Führungsrolle 1 ein Faden oder aber auch mehrere parallel nebeneinander laufende Fäden mit einer Teilumschlingung geführt. Der Führungsmantel 2 wird von dem Faden oder die Fäden zur Drehung angetrieben. Hierzu wird über die Druckluftquelle 16 kontinuierlich eine Druckluft bereitgestellt, um über die Druckluftleitung 15 dem Druckluftanschluss 8 zugeführt. Die Druckluft wird vor Eintritt in die Führungsrolle 1 durch die Heizspirale 17 auf eine vorbestimmte Soll-Temperatur erwärmt. Die erwärmte Druckluft gelangt dann über den Druckluftanschluss 8 in den Druckluftkanal 9 des Achsenträgers 3 und wird über die Verteilbohrungen 10 den Ringkammern 6.1 und 6.2 zugeführt. Anschließend durchdringt die erhitzte Druckluft den Gleitmantel 7 und tritt an der Manteloberfläche des Gleitmantels 7 kontinuierlich in den Luftspalt 5 ein. Somit bildet sich ein Luftpolster zwischen dem Führungsmantel 2 und dem Gleitmantel 7 aus, der sich im Wesentlichen über die gesamte Länge des Luftspaltes 5 erstreckt. Durch die erhitzte Druckluft wird der Führungsmantel 2 erwärmt, so dass sich eine für die Fadenbehandlung erforderliche und vordefinierte Oberflächentemperatur am äußeren Umfang des Führungsmantels 2 einstellt.In the apparatus shown in Fig. 1, a thread or several parallel juxtaposed threads is performed with a Teilumschlingung in the operating state on the circumference of the guide shell 2 of the guide roller 1. The guide casing 2 is driven by the thread or threads for rotation. For this purpose, compressed air is continuously supplied via the compressed air source 16 in order to be supplied to the compressed air connection 8 via the compressed air line 15. The compressed air is heated by the heating coil 17 to a predetermined target temperature before entering the guide roller 1. The heated compressed air then passes via the compressed air connection 8 in the compressed air channel 9 of the axle carrier 3 and is supplied via the distribution holes 10 to the annular chambers 6.1 and 6.2. Subsequently, the heated compressed air penetrates the sliding shell 7 and occurs on the mantle surface of the sliding jacket 7 continuously in the air gap 5 a. Thus, an air cushion is formed between the guide casing 2 and the sliding skirt 7, which extends substantially over the entire length of the air gap 5. As a result of the heated compressed air, the guide casing 2 is heated so that a required and predefined surface temperature for the yarn treatment is established on the outer circumference of the guide casing 2.
Die kontinuierlich dem Luftspalt 5 zugeführte beheizte Druckluft gelangt anschließend über die Radialspalte 12.1 und 12.2 in die Umgebung der Führungsrol- Ie 1. Neben der Lagerung des Führungsmantels 2 wird damit gleichzeitig eine kontinuierliche Temperierung des Führungsmantels 2 erreicht.The heated compressed air supplied continuously to the air gap 5 then passes through the radial gaps 12. 1 and 12. 2 into the vicinity of the guide roller. Ie 1. In addition to the storage of the guide casing 2 so that a continuous temperature control of the guide casing 2 is achieved simultaneously.
Um eine vordefinierte Oberflächentemperatur an dem Führungsmantel 2 einhalten zu können, ist der Heizspirale 17 eine Heizsteuerung 18 zugeordnet. Die Heizsteuerung 18 ist mit einem Temperatursensor 19 verbunden, der kontinuierlich die Temperatur der Druckluft erfasst, die in den Druckluftkanal 9 des Achsträgers 3 eingeleitet wird. Für den Fall, dass innerhalb der Heizsteuerung 18 eine Abweichung zwischen einer vorgegebenen Soll-Temperatur der Druckluft und einer ge- messenen Ist-Temperatur der Druckluft festgestellt wird, erfolgt eine Steuerung der Heizspirale 17. Somit lässt sich eine Temperaturregelung herstellen, die eine konstante Drucklufttemperatur gewährleistet.In order to be able to comply with a predefined surface temperature on the guide casing 2, the heating coil 17 is assigned a heating control 18. The heating control 18 is connected to a temperature sensor 19, which continuously detects the temperature of the compressed air, which is introduced into the compressed air channel 9 of the axle carrier 3. In the event that a deviation between a predetermined desired temperature of the compressed air and a measured actual temperature of the compressed air is detected within the heating control 18, a control of the heating coil 17 takes place. Thus, a temperature control can be established which is a constant compressed air temperature guaranteed.
In Fig. 2 ist ein zweites Ausführungsbeispiel der erfindungsgemäßen Vorrichtung schematisch gezeigt. Das Ausführungsbeispiel ist im Aufbau und in der Funktion wesentlich identisch zu dem vorgenannten Ausführungsbeispiel, so dass an dieser Stelle nur die Unterschiede erläutert werden und ansonsten Bezug zu der vorgenannten Beschreibung genommen wird. Die Bauteile haben die gleichen Bezugszeichen erhalten.2, a second embodiment of the device according to the invention is shown schematically. The embodiment is substantially identical in construction and in function to the aforementioned embodiment, so that at this point only the differences will be explained and otherwise reference is made to the above description. The components have been given the same reference numerals.
Bei der in Fig. 2 dargestellten Vorrichtung ist der Führungsmantel 2 der Führungsrolle 1 direkt an dem Achsträger 3 gelagert. Hierzu weist der Achsträger 3 einen Lagerabschnitt 31 auf, der an einer Stirnseite mit dem im Durchmesser kleineren Gestellende 13 verbunden ist. Am Umfang des Lagerabschnittes 31 sind mehrere gleichmäßig verteilte Düsenöffnungen 22 ausgebildet. Die Düsenöffnungen 22 sind über Düsenbohrungen 21 mit radial verlaufenden Verteilbohrungen 10 verbunden, die in einen mittleren Druckluftkanal 9 münden. Der Druckluftkanal 9 ist an dem Gestellende 13 mit dem Druckluftanschluss 8 verbunden.In the apparatus shown in FIG. 2, the guide casing 2 of the guide roller 1 is mounted directly on the axle carrier 3. For this purpose, the axle carrier 3 has a bearing section 31, which is connected at one end face to the smaller frame end 13 in the diameter. At the periphery of the bearing portion 31 a plurality of uniformly distributed nozzle openings 22 are formed. The nozzle openings 22 are connected via nozzle bores 21 with radially extending distribution holes 10, which open into a central compressed air channel 9. The compressed air channel 9 is connected to the frame end 13 with the compressed air connection 8.
Die Luft lag erung 4 ist durch den radial umlaufenden Luftspalt 5 zwischen dem Achsträger 3 und dem Führungsmantel 2 gebildet. Der Luftspalt 5 erstreckt sich in axialer Richtung über die Länge des Lagerabschnittes 31 des Achsträgers 3, wobei zu beiden Enden des Lagerabschnittes 31 der Führungsmantel 2 die Anlaufringe 11.1 und 11.2 aufweist. Somit bilden sich die an den Stirnseiten des Lagerabschnittes 31 radial verlaufende Radialspalte 12.1 und 12.2 zwischen dem Achsträ- ger 3 und den Anlaufringen 11.1 und 11.2.The air storage 4 is formed by the radially encircling air gap 5 between the axle 3 and the guide casing 2. The air gap 5 extends in axial direction over the length of the bearing portion 31 of the axle beam 3, wherein at both ends of the bearing portion 31 of the guide casing 2, the stop rings 11.1 and 11.2. Thus, the radial gaps 12.1 and 12.2, which extend radially at the end sides of the bearing section 31, form between the axle carrier 3 and the thrust rings 11.1 and 11.2.
Die Druckluftzufuhr erfolgt in diesem Ausführungsbeispiel durch eine Druckluftquelle 16 und eine mit der Druckluftquelle 16 und dem Druckluftanschluss 8 verbundene Druckluftleitung 15. Um eine Erwärmung der Druckluft auszuführen, ist in der Druckluftleitung 15 ein als Heizmittel 14 wirkender Druckluftheizer 20 geschaltet. Somit wird zunächst die über die Druckluftquelle 16 zugeführte Druckluft in den Druckluftheizer 20 geleitet und auf eine vorbestimmte Drucklufttemperatur erhitzt. Anschließend wird die erhitzte Druckluft aus dem Druckluftheizer 20 dem Druckluftanschluss 8 zugeführt.The compressed air supply takes place in this embodiment by a compressed air source 16 and connected to the compressed air source 16 and the compressed air connection 8 compressed air line 15. To perform a heating of the compressed air, in the compressed air line 15 acting as a heating means 14 compressed air heater 20 is connected. Thus, first the supplied via the compressed air source 16 compressed air is fed into the compressed air heater 20 and heated to a predetermined compressed air temperature. Subsequently, the heated compressed air from the compressed air heater 20 is supplied to the compressed air connection 8.
Zur Steuerung und Regelung der Drucklufttemperatur der erhitzten Druckluft ist ein Temperatursensor 19 vorgesehen, der dem Druckluftkanal 9 innerhalb des Achsträgers 3 zugeordnet ist. Der Temperatursensor 19 ist mit der Heizsteuerung 18 verbunden, die zur Steuerung mit dem Druckluftheizer 20 gekoppelt ist.For controlling and regulating the compressed air temperature of the heated compressed air, a temperature sensor 19 is provided, which is assigned to the compressed air channel 9 within the axle carrier 3. The temperature sensor 19 is connected to the heating controller 18, which is coupled to the compressed air heater 20 for control.
Die Funktion des in Fig. 2 dargestellten Ausführungsbeispiels der erfmdungsge- mäßen Vorrichtung zur Durchführung des erfindungsgemäßen Verfahrens ist identisch zu dem vorhergehenden Ausführungsbeispiel nach Fig. 1, so dass an dieser Stelle eine weitere Erläuterung entbehrlich ist.The function of the exemplary embodiment of the device according to the invention for carrying out the method according to the invention shown in FIG. 2 is identical to the preceding exemplary embodiment according to FIG. 1, so that further explanation is unnecessary at this point.
Die in den Fig. 1 und 2 dargestellten Ausführungsbeispiele der erfmdungsgemä- ßen Vorrichtung sind im Aufbau der Führungsrolle 1 und insbesondere im Aufbau der Luftlagerung 4 beispielhaft. Wesentlich hierbei ist, dass die der Luftlagerung 4 zugeführte Druckluft durch einen außerhalb der Führungsrolle angeordnetes Heizmittel beheizbar ist. Insoweit ist die Erfindung besonders geeignet, um bereits in Maschinen installierte Führungsrollen mit kalten Führungsmänteln umzurüsten, so dass die zur Luftlagerung verwendete Druckluft der Führungsrolle im erhitzten Zustand zugeführt wird.The exemplary embodiments of the device according to the invention shown in FIGS. 1 and 2 are exemplary in the design of the guide roller 1 and in particular in the construction of the air bearing 4. It is essential here that the air bearing 4 supplied compressed air can be heated by a heating means arranged outside the guide roller. In that regard, the invention is particularly suitable for retrofitting already installed in machine guide rollers with cold leadership coats, so that the compressed air used for air storage of the guide roller is supplied in the heated state.
Die Erfindung lässt sich besonders vorteilhaft in Schmelzspinneinrichtungen ver- wenden, bei welchen frisch extrudierte Fäden durch Galettensysteme geführt, erwärmt und verstreckt werden. In Fig. 3 ist ein Ausführungsbeispiel einer derartigen Schmelzspinneinrichtung schematisch in einer Ansicht gezeigt. Hierbei sind nur die für die Verwendung der erfmdungsgemäßen Vorrichtung wesentlichen Bauteile einer Schmelzspinnvorrichtung dargestellt. Die Schmelzspinnvorrichtung weist einen Spinnkopf 23 auf, der an seiner Unterseite eine Spinndüse 24 trägt. Der Spinnkopf 23 ist über einen Schmelzezulauf 32 mit einer Schmelzequelle verbunden. Unterhalb des Spinnkopfes 23 ist ein Kühlschacht 25 sowie ein Galet- tensystem mit einer Abzugsgaletteneinheit 27 und einer Streckgaletteneinheit 28 angeordnet. Die Abzugsgaletteneinheit 27 ist durch eine Galette 29.1 und eine kalte Führungsrolle 30 gebildet. Die Galette 29.1 weist einen beheizten Galetten- mantel 33 auf.The invention can be used particularly advantageously in melt spinning devices in which freshly extruded filaments are passed through godet systems, heated and drawn. In Fig. 3, an embodiment of such a melt spinning device is shown schematically in a view. In this case, only the components of a melt spinning device which are essential for the use of the device according to the invention are shown. The melt spinning device has a spinner head 23 which carries a spinneret 24 on its underside. The spinning head 23 is connected via a melt inlet 32 with a melt source. Below the spinning head 23, a cooling shaft 25 and a godet system with a withdrawal godet unit 27 and a draw godet unit 28 are arranged. The withdrawal godet unit 27 is formed by a godet 29.1 and a cold guide roll 30. The godet 29. 1 has a heated godet jacket 33.
Die nachgeordnete Streckgaletteneinheit 28 ist durch eine zweite angetriebene Galette 29.2 und eine nicht angetriebene beheizte Führungsrolle 1 gebildet. Der Führungsrolle 1 ist eine Druckluftquelle 16 und ein Druckluftheizer 20 zugeordnet, so dass die Führungsrolle 1 gemäß dem Ausführungsbeispiel nach Fig. 1 oder 2 einen beheizten Führungsmantel 2 aufweist. Der Galettenmantel 33 der zweiten Galette 29.2 ist ebenfalls beheizt.The downstream draw godet unit 28 is formed by a second driven godet 29.2 and a non-driven heated guide roll 1. The guide roller 1 is associated with a compressed air source 16 and a compressed air heater 20, so that the guide roller 1 according to the embodiment of FIG. 1 or 2 has a heated guide casing 2. The godet casing 33 of the second godet 29.2 is also heated.
In dem in Fig. 3 dargestellten Ausführungsbeispiel der Schmelzspinneinrichtung wird ein Faden 34 aus einer Polymerschmelze gesponnen. Hierzu wird die Polymerschmelze durch die Spinndüse 24 in eine Mehrzahl von Filamenten extrudiert, die als ein Filamentbündel 26 nach einer Abkühlung zusammengeführt werden. Der Abzug des Filamentbündels 26 von der Spinndüse 4 erfolgt durch die Abzu- gsgaletteneinheit 27. Hierzu wird die Abzugsgaletteneinheit 27 an dem Faden 34 mehrfach umschlungen. Durch den beheizten Galettenmantel 33 wird der Faden 34 erwärmt, um durch Abzugs mittels der Streckgaletteneinheit 28 verstreckt zu werden. An der Streckgaletteneinheit 28 wird der Faden 34 ebenfalls mit mehrfacher Umschlingung geführt, wobei der Faden zur thermischen Nachbehandlung an der Oberfläche des beheizten Galettenmantels 33 und an der Oberfläche des be- heizten Führungsmantels 2 der Führungsrolle 1 erwärmt wird. Anschließend wird der Faden zu einer Spule aufgewickelt oder weiterbehandelt, beispielsweise gekräuselt zur Herstellung eines Teppichgarnes.In the embodiment of the melt spinning device shown in FIG. 3, a yarn 34 is spun from a polymer melt. For this purpose, the polymer melt is extruded through the spinneret 24 into a plurality of filaments, which are combined as a filament bundle 26 after cooling. The deduction of the filament bundle 26 from the spinneret 4 is made by the Abg- gsgaletteneinheit 27. For this purpose, the Abzugsgaletteneinheit 27 is wrapped around the thread 34 several times. Through the heated godet casing 33, the thread 34 is heated to be drawn by withdrawal by means of the draw godet unit 28. At the draw godet unit 28, the thread 34 is likewise guided with multiple wrapping, the thread being heated for thermal aftertreatment on the surface of the heated godet casing 33 and on the surface of the heated guide casing 2 of the guide roll 1. Subsequently, the thread is wound into a bobbin or further treated, for example crimped to produce a carpet yarn.
Die an dem Galettenmantel 33 und an dem Führungsmantel 2 eingestellte Ober- flächentemperatur ist vorzugsweise gleich eingestellt, um den Faden 34 zu erwärmen. So könnte beispielsweise bei einer Schrumpfbehandlung die Oberflächentemperatur im Bereich von 2000C liegen.The surface temperature set on the godet casing 33 and on the guide casing 2 is preferably set equal to heat the yarn 34. For example, in a shrinkage treatment, the surface temperature in the range of 200 0 C could be.
Es besteht jedoch auch die Möglichkeit, die Abzugsgaletteneinheit 27 mit einer angetriebenen Galette und beheizten Galettenmantel mit der erfmdungsgemäßen Vorrichtung zu kombinieren. Diese Ausführung ist in Fig. 3 gestrichelt dargestellt. However, it is also possible to combine the take-off godet unit 27 with a driven galette and heated godet casing with the device according to the invention. This embodiment is shown in dashed lines in Fig. 3.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
1 Führungsrolle1 leadership
2 Führungsmantel2 guide sheath
3 Achsträger3 axle beams
4 Luftlagerung4 air storage
5 Luftspalt5 air gap
6.1 , 6.2 Ringkammer6.1, 6.2 Ring Chamber
7 Gleitmantel7 sliding jacket
8 Druckluftanschluss8 compressed air connection
9 Druckluftkanal9 compressed air duct
10 Verteilbohrung10 distribution hole
11. 1, 11.2 Anlaufring11. 1, 11.2 stop ring
12. 1, 12.2 Radialspalt12. 1, 12.2 Radial gap
13 Gestellende13 end of stand
14 Heizmittel14 heating means
15 Druckluftleitung15 compressed air line
16 Druckluftquelle16 compressed air source
17 Heizspirale17 heating coil
18 Heizsteuerung18 heating control
19 Temperatursensor19 temperature sensor
20 Druckluftheizer20 compressed air heaters
21 Düsenbohrungen21 nozzle holes
22 Düsenöffnungen22 nozzle openings
23 Spinnkopf23 spinning head
24 Spinndüse24 spinneret
25 Kühlschacht25 cooling shaft
26 Filamentbündel26 filament bundles
27 Abzugsgaletteneinheit27 Discharge godet unit
28 Streckgaletteneinheit28 draw godet unit
29. 1, 29.2 Galette kalte Führungsrolle29. 1, 29.2 Galette cold leadership
Lagerabschnittbearing section
Schmelzzulauf beheizter GalettenmantelMelt inlet heated godet jacket
Faden thread

Claims

Patentansprüche claims
1. Verfahren zum Beheizen eines drehbar gelagerten Führungsmantels einer Führungsrolle zum Führen und Erwärmen von Fäden, bei wel- chem der Führungsmantel durch eine Luftlagerung am Umfang einesA method of heating a rotatably mounted guide sleeve of a guide roller for guiding and heating threads, wherein the guide sleeve by an air bearing on the circumference of a
Achsträgers der Führungsrolle gehalten wird, dadurch gekennzeichnet, dass eine Druckluft außerhalb der Führungsrolle erwärmt wird und dass die erwärmte Druckluft der Luftlagerung des Führungsmantels zuge- führt wird.Achstan of the guide roller is held, characterized in that a compressed air is heated outside the guide roller and that the heated compressed air is fed to the air bearing of the guide casing.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass die Druckluft in einem separaten Druckluftheizer erhitzt wird, dem die Druckluft aus einer Druckluftquelle zugeführt wird.2. The method according to claim 1, characterized in that the compressed air is heated in a separate compressed air heater to which the compressed air is supplied from a compressed air source.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Druckluft auf eine Solltemperatur erhitzt wird, dass eine Ist- Temperatur der Druckluft erfasst wird und dass die Erhitzung der3. The method according to claim 1 or 2, characterized in that the compressed air is heated to a desired temperature, that an actual temperature of the compressed air is detected and that the heating of the
Druckluft in Abhängigkeit von einer Abweichung zwischen der Soll- Temperatur und der Ist-Temperatur geregelt wird.Compressed air is regulated in dependence on a deviation between the setpoint temperature and the actual temperature.
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die erwärmte Druckluft innerhalb der Führungsrolle durch einen porösen Gleitmantel in einen Luftspalt der Luftlagerung verteilt wird.4. The method according to any one of claims 1 to 3, characterized in that the heated compressed air is distributed within the guide roller by a porous sliding jacket in an air gap of the air bearing.
5. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die erwärmte Druckluft innerhalb der Führungsrolle durch mehrere Düsenbohrungen in einen Luftspalt der Luftlagerung verteilt wird.5. The method according to any one of claims 1 to 3, characterized in that the heated compressed air is distributed within the guide roller through several nozzle holes in an air gap of the air bearing.
6. Vorrichtung zur Durchführung des Verfahrens nach einem der Ans- prüche 1 bis 5, mit einer Führungsrolle (1), die einen drehbar gelagerten Führungsmantel (2) und einen Achsträger (3) aufweist, wobei zwischen dem Führungsmantel (2) und dem Achsträger (3) eine Luftlagerung (4) ausgebildet ist, die über eine Druckluftleitung (15) mit einer Druckluftquelle (16) gekoppelt ist, dadurch gekennzeichnet, dass der Druckluftleitung (15) außerhalb der Führungsrolle (1) ein Heizmittel (14) zugeordnet ist, durch welches eine Druckluft beheizbar ist.6. Apparatus for carrying out the method according to one of claims 1 to 5, comprising a guide roller (1), which has a rotatably mounted guide casing (2) and an axle carrier (3), wherein between the guide casing (2) and the axle carrier (3) an air bearing (4) is formed, which is coupled via a compressed air line (15) with a compressed air source (16), characterized in that the compressed air line (15) outside the guide roller (1) is associated with a heating means (14), through which a compressed air can be heated.
7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass das Heizmittel (14) durch einen elektrischen Druckluftheizer (20) gebildet ist, der in der Druckluftleitung (15) zwischen der Druckquelle (16) und einem Druckluftanschluss (8) der Führungsrolle (1) geschaltet ist.7. The device according to claim 6, characterized in that the heating means (14) by an electric compressed air heater (20) is formed in the compressed air line (15) between the pressure source (16) and a compressed air connection (8) of the guide roller (1). is switched.
8. Vorrichtung nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass dem Heizmittel (14) eine Heizsteuerung (18) zugeordnet ist, welche mit einem Temperatursensor (19) zur Erfassung einer Ist-Temperatur der erwärmten Druckluft verbunden ist.8. Apparatus according to claim 6 or 7, characterized in that the heating means (14) is associated with a heating control (18) which is connected to a temperature sensor (19) for detecting an actual temperature of the heated compressed air.
9. Vorrichtung nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, dass die Luftlagerung (4) durch einen Luftspalt (5) zwischen dem Führungsmantel (2) und einem porösen Gleitmantel (7) gebildet ist, wo- bei der Gleitmantel (7) am Umfang des Achsträger (3) gehalten ist, an welchem Umfang zumindest eine mit dem Druckanschluss (8) verbundene Ringkammer (6.1, 6.2) ausgebildet ist.9. Device according to one of claims 6 to 8, characterized in that the air bearing (4) by an air gap (5) between the guide casing (2) and a porous sliding jacket (7) is formed, in the sliding skirt (7) is held on the circumference of the axle carrier (3), on which circumference at least one annular chamber (6.1, 6.2) connected to the pressure port (8) is formed.
10. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, dass der Gleitmantel (7) aus einem offenporigem Sintermetall oder Sinterkohle gebildet ist.10. The device according to claim 9, characterized in that the sliding jacket (7) is formed from an open-pored sintered metal or sintered carbon.
11. Vorrichtung nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, dass die Luftlagerung (4) durch einen Luftspalt (5) zwischen dem Führungsmantel (2) und dem Achsträger (3) gebildet ist, wobei der Achsträger (3) am Umfang mehrere Düsenöffnungen (22) aufweist, die mit dem Druckluftanschluss (8) verbunden sind und in den Luftspalt (5) münden.11. Device according to one of claims 6 to 8, characterized in that the air bearing (4) by an air gap (5) between the guide casing (2) and the axle support (3) is formed, wherein the axle support (3) on the circumference more Having nozzle openings (22) which are connected to the compressed air connection (8) and open into the air gap (5).
12. Vorrichtung nach einem der Ansprüche 6 bis 11, dadurch gekennzeichnet, dass der Führungsmantel (2) hohlzylindrisch ausgebildet ist und an beiden Enden jeweils einen Anlaufring (11.1, 11.2) aufweist, wobei die Anlaufringe (11.1, 11.2) drehfest mit dem Führungsmantel (2) verbunden sind und den Luftspalt (5) der Luftlagerung (4) zu beiden Stirnseiten hin begrenzen.12. Device according to one of claims 6 to 11, characterized in that the guide casing (2) is formed as a hollow cylinder and at both ends in each case a stop ring (11.1, 11.2), wherein the thrust rings (11.1, 11.2) rotatably with the guide sheath (11 2) are connected and limit the air gap (5) of the air bearing (4) to both end sides.
13. Verwendung einer Vorrichtung nach einem der Ansprüche 6 bis 12 in einer Schmelzspinneinrichtung, bei welcher ein oder mehrere Fäden (34) durch mehrere Galetten (29.1, 29.2) geführt, erwärmt und verstreckt werden, wobei zumindest eine der Galetten (29.1, 29.2) zur Führung des Fadens (34) mit der Führungsrolle (1) zusammenwirkt. 13. Use of a device according to one of claims 6 to 12 in a melt spinning device, in which one or more threads (34) are guided, heated and drawn through a plurality of godets (29.1, 29.2), at least one of the godets (29.1, 29.2). for guiding the thread (34) with the guide roller (1) cooperates.
14. Verwendung nach Anspruch 13, dadurch gekennzeichnet, dass ein Galettenmantel (33) der Galette (29.2) und der Führungsmantel (2) der Führungsrolle (1) auf eine gleich hohe Oberflächentempera- tur beheizt sind. 14. Use according to claim 13, characterized in that a godet casing (33) of the godet (29.2) and the guide casing (2) of the guide roller (1) are heated to an equally high surface temperature.
EP09782236.5A 2008-09-01 2009-08-26 Method and apparatus for heating of a guiding sleeve on a revolving bearing of a guiding roll Not-in-force EP2321453B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008045357A DE102008045357A1 (en) 2008-09-01 2008-09-01 Method and device for heating a rotatably mounted guide sleeve of a guide roller
PCT/EP2009/061022 WO2010023232A2 (en) 2008-09-01 2009-08-26 Method and device for heating a rotatably mounted guide casing of a guide roller

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EP2321453A2 true EP2321453A2 (en) 2011-05-18
EP2321453B1 EP2321453B1 (en) 2013-08-07

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US (1) US20110200957A1 (en)
EP (1) EP2321453B1 (en)
CN (1) CN102137965A (en)
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WO (1) WO2010023232A2 (en)

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CN108754637B (en) * 2018-08-15 2023-07-25 北京化工大学 Melt differential electrospinning device and method for continuous direct plasticizing and feeding of film

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NL6912025A (en) * 1969-08-07 1970-09-23
GB1296004A (en) * 1970-03-06 1972-11-15
DE2435009B2 (en) * 1974-07-20 1979-09-27 Bayer Ag, 5090 Leverkusen Process for the production of polyamide 6 filament yarns
NL7510463A (en) 1975-09-05 1977-03-08 Akzo Nv ARRANGEMENT AND METHOD FOR HEATING WIRES AND WIRES THEREFORE TREATED.
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JP2002317340A (en) * 2001-02-01 2002-10-31 Neumag Gmbh & Co Kg Godet for guiding, heating, and conveying yarn
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DE102008045357A1 (en) 2010-03-04
US20110200957A1 (en) 2011-08-18

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