EP0110150B1 - Air jet spinning device - Google Patents

Air jet spinning device Download PDF

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Publication number
EP0110150B1
EP0110150B1 EP83110769A EP83110769A EP0110150B1 EP 0110150 B1 EP0110150 B1 EP 0110150B1 EP 83110769 A EP83110769 A EP 83110769A EP 83110769 A EP83110769 A EP 83110769A EP 0110150 B1 EP0110150 B1 EP 0110150B1
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EP
European Patent Office
Prior art keywords
guide tube
roller pair
spinning device
delivery roller
jet spinning
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
EP83110769A
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German (de)
French (fr)
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EP0110150A1 (en
Inventor
Herbert Vord. Stalder
Emil Briner
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Publication of EP0110150A1 publication Critical patent/EP0110150A1/en
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H15/00—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing
    • D01H15/002—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing for false-twisting spinning machines
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/22—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by rollers only

Definitions

  • the invention relates to a nozzle spinning device with a pneumatic twist nozzle arranged after a pair of delivery rollers for taking over a non-spun yarn delivered by the pair of delivery rollers, and with a pair of outlet rollers downstream of the twist nozzle for taking over the spun yarn delivered by the twist nozzle.
  • the yarn occasionally breaks in the nozzle spinning process, which is determined by an automatic monitoring system not belonging to the invention.
  • the sliver feed is interrupted by the automatic system.
  • a device at the end of a fiber drafting device is also known, in which a fiber sliver is transported through a conveying nozzle and fed into the gusset area of two take-off rollers with a guide tube.
  • the device is used to feed the stretched belt to a rotary pot belt reel and thus to automate an activity that was originally carried out manually.
  • the sliver is given a certain amount of wrong rotation in the conveying nozzle in order to give it more strength, but there is no spinning, in particular no nozzle spinning.
  • Pneumatic conveying has very different requirements when it comes to nozzle spinning than when conveying a fine yarn compared to it between two draw-off rollers at the end of a fiber drafting system.
  • well-defined exhaust air conditions must be observed when spinning a nozzle.
  • the object of the invention is to provide a nozzle spinning device of the type mentioned which enables the automatic elimination of honeycomb fractures in a structurally uncomplicated manner, in which the spinning yarn is maintained at high speed by the discharge roller pair with the spun yarn maintained during operation without substantial throttling of the exhaust air flow is transferred.
  • the swirl nozzle is connected to a pneumatic guide tube which projects so close to the pair of outlet rollers that the yarn is conveyed into the converging space of the pair of outlet rollers and is thereby automatically detected by the pair of outlet rollers, the between the circumferential mouth edge of the pneumatic guide tube and the resultant air outlet cross-section of the cylindrical surface of the pair of outlet rollers is essentially not smaller than a mouth cross-section of the pneumatic guide tube measured perpendicular to the direction of flow.
  • the air outlet cross section mentioned is the smallest area between the mouth edge of the pneumatic guide tube and the opposite cylindrical surfaces of the pair of outlet rollers.
  • Mouth cross-section is understood to mean the inner cross-section of the pneumatic guide tube in the area in front of its mouth.
  • the advantages of the invention are that, on the one hand, the self-threading of the yarn into the pair of outlet rollers is solved in the simplest manner, and on the other hand, in the case of automation for eliminating thread breaks, only the easier transfer of the yarn from the outlet rollers to the winding device has to be mechanized.
  • a nozzle spinning device 1 comprises one arranged next to a pair of delivery rollers 2 pneumatic swirl nozzle 3 with a directly connected pneumatic guide tube 4, which opens against a pair of outlet rollers 5.
  • the pneumatic guide tube guides an air flow under normal aerodynamic conditions, i.e. H. without abrupt changes in cross-section and with a roughness that is common for pneumatic conveying pipes for fibers.
  • the nozzle spinning device 1 is connected downstream of a drafting system 6, to which the pair of delivery rollers 2 also belongs.
  • the drafting system 6 also comprises a middle pair of rollers 7 with guide straps 7.1 and 7.2, an input pair of rollers 8, as well as a second sliver condenser 9 arranged between the pair of rollers 7 and the pair of rollers 8 and a first sliver condenser 10 arranged in front of the pair of input rollers 8.
  • the drafting unit 6 takes over a sliver 11, which runs into the drafting device in the direction of the arrow, and is drawn to a still unspun yarn, delivered by the pair of delivery rolls 2 and automatically taken over by the pneumatic swirl nozzle 3.
  • Sliver 11 can be understood to mean a stretch belt or one or more combined flyer slits.
  • this unspun yarn is spun into a finished yarn 12 taken over from the pair of outlet rollers 5.
  • the yarn 12 leaves the pair of rollers 5 in the direction of the arrow and is finally taken over by a winding device (not shown).
  • drafting arrangement 6 instead of the drafting arrangement 6 shown, another drafting arrangement can also be used, which is capable of delivering an unspun yarn at the same speed.
  • the swirl nozzle 3 is known per se from DE-B-27 22 319.
  • This swirl nozzle 3 is provided with a cylindrical surface 14 and a stop 15 in addition to receiving a sleeve 13 provided on the guide tube 4.
  • the guide tube 4 can be fixed to the swirl nozzle 3 with a clamping ring (not shown) which comprises the two parts.
  • a thread (not shown) can be provided for fixing the guide tube 4 to the swirl nozzle 3.
  • the guide tube 4 has an inner wall 16, which has the same diameter as the outlet channel C at the connection 17 to the outlet channel C of the swirl nozzle 3.
  • the swirl nozzle 3 and the guide tube 4 can also be produced in one piece (not shown) or the tube 4 can be composed of several parts (not shown).
  • the outlet-side mouth edge 18 of the guide tube 4 protrudes so close to the outlet roller pair 5 that the yarn 12 is conveyed into the converging space 19 of the outlet roller pair 5 and is thereby grasped by the latter.
  • the air outlet cross-section between the mouth edge 18 and the cylindrical surface of the outlet roller pair 5 must not be substantially less than the mouth cross-section measured above and perpendicular to the direction of flow. This condition applies to all variants to be described.
  • the edge 20 in FIG. 4 becomes the edge 20.1, in FIG. 5 the edge 20.2, in FIG. 6 the edge 20.3, in FIG. 7 the edge 20.4, in FIG. 8 the edge 20.5 and in FIG. 9 to edge 20.6.
  • the arrangement of the guide tube 4 must be such that its axis of symmetry (not shown) coincides with the thread path in the region of the outlet mouth.
  • the wall of the guide tube 4 has an arc piece 21 in the region of the mouth, in FIG. 8 a deflection part 22 and in FIG. 9 a deflection part 23.
  • the bow piece 21 and the deflecting parts 22 and 23 support the deflection of the flow and the yarn when it is drawn into the converging space 19.
  • the curved piece 21 is formed by the bending of the guide tube 4 in the mouth region shown in FIG. 7.
  • the deflecting parts 22 and 23 are flat plate parts which, as in Fig. 8 and. 9 shown, with an inclination angle a respectively. ⁇ are attached to a milled surface of the guide tube 4 in the mouth region.
  • the measure of the angle of inclination a resp. ß depends on the inclination of the pair of outlet rollers 5 to the guide tube 4, and on the speed of the air flow and is determined empirically in practice.
  • FIG. 9 shows a further measure influencing the direction of flow, in which the distance between the cylindrical surface of the outlet roller pair 5 and the mouth edge 18.6 is smallest in the lowest region, ie opposite the lower roller 5.1, and to the uppermost region of the edge 18.6 is gradually increasing.
  • the air outlet in the lowest Area of the edge 18.6 be designed such that the yarn 12 is certainly not conveyed past the lower outlet roller 5.1 past the edge 20.6 into the open air, but into the converging space 19.
  • the amount of air flowing through the guide tube 4 corresponds to the amount of air emitted by the swirl nozzle 3.
  • the free yarn end of the yarn 12 is directed through the guide tube 4 against and into the converging space 19 so that it is removed from the pair of rollers 5 can be detected.
  • the guide tube 4 can have a cone (not shown) that widens towards the pair of outlet rollers 5.
  • This cone can have the same opening angle (not shown) over the entire length of the guide tube.
  • the opening angle should not be significantly larger than the opening angle of the output channel.
  • the aforementioned cross-section of the mouth is the cross-section of the mouth opening itself in FIG. 3, while in the remaining figures it is the cross-section still affecting the entire circumferential tube wall, the immediately following the obliquely cut mouth (FIG. 5) or the profiled mouth (FIG. 4 and 6 to 9) follows.
  • One advantage of the favorable flow design of the guide tube is the possibility of damping the noise caused by the air outlet.
  • a use, not shown, of the nozzle spinning device in a horizontal position is also possible.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Description

Die Erfindung bezieht sich auf eine Düsenspinn-Vorrichtung mit einer einem Lieferwalzenpaar anschließend angeordneten pneumatischen Dralldüse zur Übernahme eines von dem Lieferwalzenpaar abgelieferten unverspinnten Garnes, sowie mit einem der Dralldüse nachgeordneten Abgangswalzenpaar zur Übernahme des von der Dralldüse abgelieferten versponnenen Garnes.The invention relates to a nozzle spinning device with a pneumatic twist nozzle arranged after a pair of delivery rollers for taking over a non-spun yarn delivered by the pair of delivery rollers, and with a pair of outlet rollers downstream of the twist nozzle for taking over the spun yarn delivered by the twist nozzle.

Bei der Anwendung des Düsenspinn-Verfahrens und damit bei der Verwendung der Düsenspinn-Vorrichtung werden hohe Spinngeschwindigkeiten, d. h. Faserlaufgeschwindigkeiten bis zu 200m/min. erreicht. Das heißt, das Lieferwalzenpaar einerseits speist das unverspinnte Garn mit der vorgenannten Geschwindigkeit in die Dralldüse, welche andererseits das gesponnene Garn mit im wesentlichen derselben Geschwindigkeit weitergibt.When using the nozzle spinning process and thus when using the nozzle spinning device, high spinning speeds, i. H. Fiber running speeds up to 200m / min. reached. This means that the pair of delivery rollers on the one hand feeds the unspun yarn at the aforementioned speed into the swirl nozzle, which on the other hand transfers the spun yarn at essentially the same speed.

Aus der DE-B-27 22 319 ist eine Düsenspinn- Vorrichtung der genannten Art bekannt, bei welcher ein Garn mit den vorgenannten Geschwindigkeiten spinnbar ist.From DE-B-27 22 319 a nozzle spinning device of the type mentioned is known, in which a yarn can be spun at the aforementioned speeds.

Wie in anderen Spinnverfahren bricht auch im Düsenspinnverfahren gelegentlich das Garn, was durch eine nicht zur Erfindung gehörende Überwachungsautomatik festgestellt wird. In der Folge wird die Faserbandzufuhr von der Automatik unterbrochen.As in other spinning processes, the yarn occasionally breaks in the nozzle spinning process, which is determined by an automatic monitoring system not belonging to the invention. As a result, the sliver feed is interrupted by the automatic system.

Bei der aus der DE-B-27 22 319 bekannten Vorrichtung besteht der Nachteil, daß die Automatik zur Behebung eines solchen Fadenbruches nur sehr umständlich und damit teuer realisierbar ist. Dies, weil das mit der hohen Geschwindigkeit von der Dralldüse abgelieferte Garn mit einem beweglichen Saugelement an der Ausgangsmündung der Dralldüse abgenommen und zwischen automatisch voneinander trenn-und wieder schließbaren und dem Spinnvorgang entsprechend entfernt angeordneten Abgangswalzen geführt werden muß, um anschließend an eine Aufwindvorrichtung übergeben zu werden. Dieser Nachteil wirkt sich auch, wenn auch weniger, auf einen entsprechenden manuellen Vorgang aus.In the device known from DE-B-27 22 319 there is the disadvantage that the automatic mechanism for eliminating such a thread break is only very cumbersome and therefore expensive to implement. This is because the yarn delivered at high speed by the swirl nozzle has to be removed with a movable suction element at the outlet mouth of the swirl nozzle and must be guided between outlet rollers which can be automatically separated and reclosed and which are arranged at a distance from the spinning process in order to then be transferred to a winding device will. This disadvantage also affects, albeit less, a corresponding manual process.

Aus der GB-A-20 59 474 ist weiter eine Vorrichtung am Ende eines Faserstreckwerks bekannt, bei der ein Faserband durch eine Förderdüse transportiert und mit einem Führungsrohr in den Zwickelbereich zweier Abzugswalzen gegeben wird. Die Vorrichtung dient dazu, das gestreckte Band einer Drehtopf-Bandablage zuzuführen und damit eine ursprünglich manuell durchgeführte Tätigkeit zu automatisieren. Dem Faserband wird zwar in der Förderdüse eine gewisse Falschdrehung erteilt, um ihm mehr Festigkeit zu geben, doch erfolgt kein Spinnen, insbesondere kein Düsenspinnen.From GB-A-20 59 474 a device at the end of a fiber drafting device is also known, in which a fiber sliver is transported through a conveying nozzle and fed into the gusset area of two take-off rollers with a guide tube. The device is used to feed the stretched belt to a rotary pot belt reel and thus to automate an activity that was originally carried out manually. The sliver is given a certain amount of wrong rotation in the conveying nozzle in order to give it more strength, but there is no spinning, in particular no nozzle spinning.

Beim Düsenspinnen werden ganz andere Forderungen an eine pneumatische Förderung gestellt, als beim Fördern eines verglichen dazu feinen Garnes zwischen zwei Abzugswalzen an Ende eines Faserstreckwerks. Insbesondere müssen beim Düsenspinnen wohldefinierte Abluftbedingungen eingehalten werden.Pneumatic conveying has very different requirements when it comes to nozzle spinning than when conveying a fine yarn compared to it between two draw-off rollers at the end of a fiber drafting system. In particular, well-defined exhaust air conditions must be observed when spinning a nozzle.

Aufgabe der Erfindung ist es, eine die automatische Behebung von Fabenbrüchen in konstruktiv unaufwendiger Weise ermöglichende Düsenspinn-Vorrichtung der eingangs genannten Art anzugeben, bei der dem Abgangswalzenpaar das versponnene Garn mit im laufenden Betrieb aufrechterhaltener, ohne wesentliche Drosselung der Abluftströmung erfolgender pneumatischer Förderung mit hoher Geschwindigkeit überstellt wird.The object of the invention is to provide a nozzle spinning device of the type mentioned which enables the automatic elimination of honeycomb fractures in a structurally uncomplicated manner, in which the spinning yarn is maintained at high speed by the discharge roller pair with the spun yarn maintained during operation without substantial throttling of the exhaust air flow is transferred.

Diese Aufgabe wird dadurch gelöst, daß der Dralldüse ein pneumatisches Führungsrohr angeschlossen ist, welches derart nahe an das Abgangswalzenpaar heranragt, daß das Garn in den konvergierenden Raum des Abgangswalzenpaares gefördert und dadurch vom Abgangswalzenpaar selbsttätig erfaßt wird, wobei der zwischen dem umlaufenden Mündungsrand des pneumatischen Führungsrohres und der zylindrischen Oberfläche des Abgangswalzenpaares sich ergebende Luftaustrittsquerschnitt im wesentlichen nicht kleiner ist als ein senkrecht zur Strömungsrichtung gemessener Mündungsquerschnitt des pneumatischen Führungsrohres.This object is achieved in that the swirl nozzle is connected to a pneumatic guide tube which projects so close to the pair of outlet rollers that the yarn is conveyed into the converging space of the pair of outlet rollers and is thereby automatically detected by the pair of outlet rollers, the between the circumferential mouth edge of the pneumatic guide tube and the resultant air outlet cross-section of the cylindrical surface of the pair of outlet rollers is essentially not smaller than a mouth cross-section of the pneumatic guide tube measured perpendicular to the direction of flow.

Der genannte Luftaustrittsquerschnitt ist die kleinste Fläche zwischen dem Mündungsrand des pneumatischen Führungsrohres und den gegenüberliegenden zylindrischen Oberflächen des Abgangswalzenpaares.The air outlet cross section mentioned is the smallest area between the mouth edge of the pneumatic guide tube and the opposite cylindrical surfaces of the pair of outlet rollers.

Unter Mündungsquerschnitt wird der Innerquerschnitt des pneumatischen Führungsrohres im Bereich vor seiner Mündung verstanden.Mouth cross-section is understood to mean the inner cross-section of the pneumatic guide tube in the area in front of its mouth.

Die Vorteile der Erfindung bestehen darin, daß einerseits die Selbsteinfädelung des Garnes in das Abgangswalzenpaar auf das Einfachste gelöst ist und andererseits im Falle einer Automation zur Behebung von Fadenbrüchen lediglich das einfachere überbringen des Garnes von den Abgangswalzen an die Aufspulvorrichtung mechanisiert werden muß.The advantages of the invention are that, on the one hand, the self-threading of the yarn into the pair of outlet rollers is solved in the simplest manner, and on the other hand, in the case of automation for eliminating thread breaks, only the easier transfer of the yarn from the outlet rollers to the winding device has to be mechanized.

Vorteilhafte Weiterbildungen sind in den abhängigen Ansprüchen aufgeführt.Advantageous further developments are listed in the dependent claims.

Im folgenden wird die Erfindung anhand der Zeichnungen näher erläutert.The invention is explained in more detail below with reference to the drawings.

Es zeigt:

  • Fig. 1: Eine Düsenspinnvorrichtung in Kombination mit einem vorangehenden Zweizonen-Streckwerk, das Ganze in einer Abwärtsspinnrichtung, schematisch dargestellt.
  • Fig. 2: Die Kombination von Fig. 1, jedoch in Aufwärtsspinnrichtung dargestellt,
  • Fig. 3: die Düsenspinnvorrichtung von Fig. 1 oder 2, vergrößert und halbschematisch dargestellt,
  • Fig. 4 bis 9: je ein Detail der Düsenspinn- Vorrichtung von Fig. 3, in einer jeweils anderen Ausführungsart, im gleichen Maßstab dargestellt.
It shows:
  • Fig. 1: A nozzle spinning device in combination with a preceding two-zone drafting system, the whole in a downward spinning direction, shown schematically.
  • Fig. 2: The combination of Fig. 1, but shown in the upward spinning direction,
  • 3: the nozzle spinning device of FIG. 1 or 2, enlarged and shown semi-schematically,
  • Fig. 4 to 9: each a detail of the nozzle spinning device of Fig. 3, in a different embodiment, shown on the same scale.

Eine Düsenspinnvorrichtung 1 umfaßt eine an ein Lieferwalzenpaar 2 anschließend angeordnete pneumatische Dralldüse 3 mit einem unmittelbar daran angeschlossenen pneumatischen Führungsrohr 4, welches gegen ein Abgangswalzenpaar 5 mündet.A nozzle spinning device 1 comprises one arranged next to a pair of delivery rollers 2 pneumatic swirl nozzle 3 with a directly connected pneumatic guide tube 4, which opens against a pair of outlet rollers 5.

Das pneumatische Führungsrohr führt einen Luftstrom unter normalen aerodynamischen Verhältnissen, d. h. ohne schroffe Querschnittsveränderungen und mit einer für pneumatische Förderrohre für Fasern üblichen Rauhigkeit.The pneumatic guide tube guides an air flow under normal aerodynamic conditions, i.e. H. without abrupt changes in cross-section and with a roughness that is common for pneumatic conveying pipes for fibers.

Die Düsenspinnvorrichtung 1 ist einem Streckwerk 6 nachgeschaltet, zu welchem auch das Lieferwalzenpaar 2 gehört. Das Streckwerk 6 umfaßt außerdem ein mittleres Walzenpaar 7 mit Führungsriemchen 7.1 und 7.2, ein Eingangswalzenpaar 8, sowie einen zwischen dem Walzenpaar 7 und dem Walzenpaar 8 angeordneten zweiten Faserbandkondensor 9 und einen vor dem Eingangswalzenpaar 8 angeordneten ersten Faserbandkondensor 10. Das Streckwerk 6 übernimmt ein Faserband 11, welches in Pfeilrichtung in das Streckwerk einläuft, und zu einem vom Lieferwalzenpaar 2 abgelieferten und von der pneumatischen Dralldüse 3 selbsttätig übernommenen, noch unverspinnten Garn verstreckt wird. Unter Faserband 11 kann ein Streckenband oder eine oder mehrere zusammengefaßte Flyerlunten verstanden werden.The nozzle spinning device 1 is connected downstream of a drafting system 6, to which the pair of delivery rollers 2 also belongs. The drafting system 6 also comprises a middle pair of rollers 7 with guide straps 7.1 and 7.2, an input pair of rollers 8, as well as a second sliver condenser 9 arranged between the pair of rollers 7 and the pair of rollers 8 and a first sliver condenser 10 arranged in front of the pair of input rollers 8. The drafting unit 6 takes over a sliver 11, which runs into the drafting device in the direction of the arrow, and is drawn to a still unspun yarn, delivered by the pair of delivery rolls 2 and automatically taken over by the pneumatic swirl nozzle 3. Sliver 11 can be understood to mean a stretch belt or one or more combined flyer slits.

In der Dralldüse 3 wird dieses unverspinnte Garn zu einem fertigen, vom Abgangswalzenpaar 5 übernommenen Garn 12 versponnen. Das Garn 12 verläßt das Walzenpaar 5 in Pfeilrichtung und wird schließlich von einer Aufspulvorrichtung (nicht gezeigt) übernommen.In the swirl nozzle 3, this unspun yarn is spun into a finished yarn 12 taken over from the pair of outlet rollers 5. The yarn 12 leaves the pair of rollers 5 in the direction of the arrow and is finally taken over by a winding device (not shown).

Anstelle des gezeigten Streckwerkes 6 kann auch ein anderes Streckwerk verwendet werden, welches in der Lage ist, ein unverspinntes Garn mit derselben Geschwindigkeit abzuliefern.Instead of the drafting arrangement 6 shown, another drafting arrangement can also be used, which is capable of delivering an unspun yarn at the same speed.

Die Dralldüse 3 ist an sich aus der DE-B-27 22 319 bekannt. Diese Dralldüse 3 ist zusätzlich zur Aufnahme einer an Führungsrohr 4 vorgesehenen Manschette 13. mit einer zylindrischen Fläche 14 und einen Anschlag 15 versehen. Das Fixieren des Führungsrohres 4 an der Dralldüse 3 kann mit einen die beiden Teile umfassenden Klemmring (nicht gezeigt) geschehen. Als Variante kann anstelle der zylindrischen Fläche 14 ein Gewinde (nicht gezeigt) zum Fixieren des Führungsrohres 4 an der Dralldüse 3 vorgesehen werden.The swirl nozzle 3 is known per se from DE-B-27 22 319. This swirl nozzle 3 is provided with a cylindrical surface 14 and a stop 15 in addition to receiving a sleeve 13 provided on the guide tube 4. The guide tube 4 can be fixed to the swirl nozzle 3 with a clamping ring (not shown) which comprises the two parts. As a variant, instead of the cylindrical surface 14, a thread (not shown) can be provided for fixing the guide tube 4 to the swirl nozzle 3.

Das Führungsrohr 4 hat eine Innenwand 16, welche beim Anschluß 17 an dan Ausgangskanal C der Dralldüse 3 denselben Durchmesser aufweist wie der Ausgangskanal C.The guide tube 4 has an inner wall 16, which has the same diameter as the outlet channel C at the connection 17 to the outlet channel C of the swirl nozzle 3.

Anstelle einer Zweiteilung können die Dralldüse 3 und das Führungsrohr 4 auch aus einem Stück (nicht gezeigt) hergestellt werden oder aber das Rohr 4 kann aus mehreren Teilen zusammengesetzt sein (nicht gezeigt).Instead of a division in two, the swirl nozzle 3 and the guide tube 4 can also be produced in one piece (not shown) or the tube 4 can be composed of several parts (not shown).

Der austrittsseitige Mündungsrand 18 das Führungsrohres 4 ragt derart nahe an das Abgangswalzenpaar 5 heran, daß das Garn 12 in den konvergierenden Raum 19 des Abgangswalzenpaares 5 gefördert und dadurch von diesem erfaßt wird.The outlet-side mouth edge 18 of the guide tube 4 protrudes so close to the outlet roller pair 5 that the yarn 12 is conveyed into the converging space 19 of the outlet roller pair 5 and is thereby grasped by the latter.

Der Luftaustrittsquerschnitt zwischen dem Mündungsrand 18 und der zylindrischen überfläche des Abgangswalzenpaares 5 darf im wesentlichen nicht kleiner sein als der senkrecht zur Strömungsrichtung gemessene, vorstehend definierte Mündungsquerschnitt. Diese Bedingung gilt für alle noch zu beschreibenden Varianten.The air outlet cross-section between the mouth edge 18 and the cylindrical surface of the outlet roller pair 5 must not be substantially less than the mouth cross-section measured above and perpendicular to the direction of flow. This condition applies to all variants to be described.

Um einen gleichmäßigen Luftaustrittsquerschnitt zu. erhalten, wird, wie in Fig. 4, 6, 7 und 8 gezeigt, der Mündungsrand 18.1, resp. 18.3, resp. 18.4 resp. 18.5 teilweise in den konvergierendem Raum 19 ragend der zylindrischen Oberfläche des Ausgangswalzenpaares 5 angepaßt gestaltet.To ensure a uniform air outlet cross section. obtained, as shown in Fig. 4, 6, 7 and 8, the mouth edge 18.1, respectively. 18.3, resp. 18.4 resp. 18.5 partially in the converging space 19 projecting the cylindrical surface of the output roller pair 5 adapted.

Die Fig. 5 bis 9 zeigen außerdem den Mündungsrand 18.2, resp. 18.3, resp. 18.4, resp. 18.5, resp. 18.6 im Fall eines zur Strömungsrichtung schräg gestellten Ausgangswalzenpaares 5.5 to 9 also show the mouth edge 18.2, respectively. 18.3, resp. 18.4, respectively 18.5, resp. 18.6 in the case of a pair of output rollers 5 inclined to the direction of flow.

In diesen Varianten wird die Kante 20 in Fig. 4 zur Kante 20.1, in Fig. 5 zur Kante 20.2, in Fig. 6 zur Kante 20.3, in Fig. 7 zur Kante 20.4, in Fig. 8 zur Kante 20.5 und in Fig. 9 zur Kante 20.6.In these variants, the edge 20 in FIG. 4 becomes the edge 20.1, in FIG. 5 the edge 20.2, in FIG. 6 the edge 20.3, in FIG. 7 the edge 20.4, in FIG. 8 the edge 20.5 and in FIG. 9 to edge 20.6.

Die Anordnung des Führungsrohres 4 muß dabei derart sein, daß dessen Symmetrieachse (nicht gezeigt) mit dem Fadenlauf im Bereich der Austrittsmündung zusammenfällt.The arrangement of the guide tube 4 must be such that its axis of symmetry (not shown) coincides with the thread path in the region of the outlet mouth.

Bei Fig. 3 und 5 liegt der Mündungsrand 18 resp. 18.2 in einer Ebene, die zu einer gedachten, die Achsen der Abgangswalzen beinhaltenden Ebene im wesentlichen parallel liegt.3 and 5, the mouth edge 18 and. 18.2 in a plane which is substantially parallel to an imaginary plane containing the axes of the outfeed rollers.

Die Fig. 7 bis 9 zeigen je eine Austrittsmündung mit einer gegen das Abgangswalzenpaar 5 gerichteten Strömungsumlenkung.7 to 9 each show an outlet mouth with a flow deflection directed against the pair of outlet rollers 5.

In Fig. 7 weist die Wand des Führungsrohres 4 im Bereich der Mündung ein Bogenstück 21, in Figur 8 ein Umlenkteil 22 und in Fig. 9 ein Umlenkteil 23 auf. Das Bogenstück 21 sowie die Umlenkteile 22 und 23 unterstützen die Umlenkung der Strömung und des Garnes beim Einziehen in den konvergierenden Raum 19.In FIG. 7, the wall of the guide tube 4 has an arc piece 21 in the region of the mouth, in FIG. 8 a deflection part 22 and in FIG. 9 a deflection part 23. The bow piece 21 and the deflecting parts 22 and 23 support the deflection of the flow and the yarn when it is drawn into the converging space 19.

Das Bogenstück 21 ist durch das Abbiegen des Führungsrohres 4 im in Fig. 7 gezeigten Mündungsbereich gebildet. Die Umlenkteile 22 und 23 sind flache Plattenteile, welche, wie in Fig. 8 resp. 9 gezeigt, mit einem Neigungswinkel a resp. β an einer im Mündungsbereich angefrästen Fläche des Führungsrohres 4 befestigt sind.The curved piece 21 is formed by the bending of the guide tube 4 in the mouth region shown in FIG. 7. The deflecting parts 22 and 23 are flat plate parts which, as in Fig. 8 and. 9 shown, with an inclination angle a respectively. β are attached to a milled surface of the guide tube 4 in the mouth region.

Das Maß der Biegung des Bogenstückes 21 resp. das Maß der Neigungswinkel a resp. ß hängt von der Schrägstellung des Abgangswalzenpaares 5 zum Führungsrohr 4, sowie von der Geschwindigkeit der Luftströmung ab und wird in der Praxis empirisch ermittelt.The degree of bending of the arc piece 21, respectively. the measure of the angle of inclination a resp. ß depends on the inclination of the pair of outlet rollers 5 to the guide tube 4, and on the speed of the air flow and is determined empirically in practice.

Fig. 9 zeigt eine weitere, die Strömungsrichtung beeinflussende Maßnahme, bei welcher der Abstand zwischen der zylindrischen Oberfläche des Abgangswalzenpaares 5 und den Mündungsrand 18.6 im untersten Bereich, d. h. gegenüber der unteren Walze 5.1, am kleinsten ist, und zum obersten Bereich des Rands 18.6 hin allmählich zunehmend vergrößert wird. Durch diese Maßnahme kann der Luftaustritt im untersten Bereich des Rands 18.6 derart gestaltet werden, daß mit Sicherheit das Garn 12 nicht an der unteren Abgangswalse 5.1 an der Kante 20.6 vorbei ins Freie, sondern in den konvergierenden Raum 19 gefördert wird.FIG. 9 shows a further measure influencing the direction of flow, in which the distance between the cylindrical surface of the outlet roller pair 5 and the mouth edge 18.6 is smallest in the lowest region, ie opposite the lower roller 5.1, and to the uppermost region of the edge 18.6 is gradually increasing. With this measure, the air outlet in the lowest Area of the edge 18.6 be designed such that the yarn 12 is certainly not conveyed past the lower outlet roller 5.1 past the edge 20.6 into the open air, but into the converging space 19.

Die durch das Führungsrohr 4 strömende Luftmenge entspricht der von der Dralldüse 3 abgegebenen Luftmenge.The amount of air flowing through the guide tube 4 corresponds to the amount of air emitted by the swirl nozzle 3.

Beim Beginn des Spinnprozesses, d. h. beim Ansaugen des unverspinnten Garnes durch die Dralldüse 3 und dem anschließenden Spinnen und Weiterfördern mittels der von der Dralldüse 3 benötigten Luftmenge, wird das freie Garnende des Garnes 12 durch das Führungsrohr 4 gegen und in den konvergierenden Raum 19 gelenkt, so daß es vom Walzenpaar 5 erfaßt werden kann.At the start of the spinning process, i.e. H. when the unspun yarn is sucked in by the swirl nozzle 3 and the subsequent spinning and conveying by means of the amount of air required by the swirl nozzle 3, the free yarn end of the yarn 12 is directed through the guide tube 4 against and into the converging space 19 so that it is removed from the pair of rollers 5 can be detected.

Aus strömungstechnischen Gründen kann das Führungsrohr 4 einen sich gegen das Abgangswalzenpaar 5 hin weitenden Konus (nicht gezeigt) aufweisen. Dieser Konus kann dabei auf der ganzen Länge des Führungsrohres denselben Öffnungswinkel (nicht gezeigt) aufweisen. Der Öffnungswinkel soll jedoch auch dann, wenn das Führungsrohr nicht auf der ganzen Länge einen Konus aufweist, nicht wesentlich größer als der Öffnungswinkel des Ausgangskanals sein.For fluidic reasons, the guide tube 4 can have a cone (not shown) that widens towards the pair of outlet rollers 5. This cone can have the same opening angle (not shown) over the entire length of the guide tube. However, even if the guide tube does not have a cone over its entire length, the opening angle should not be significantly larger than the opening angle of the output channel.

Der vorgenannte Mündungsquerschnitt ist in Fig. 3 der Querschnitt der Mündungsöffnung selbst, während es in den übrigen Figuren derjenige noch die ganze umlaufende Rohrwand treffende Querschnitt ist, dem unmittelbar anschließend die schräg geschnittene Mündung (Fig. 5) oder die profilierte Mündung (Fig. 4 und 6 bis 9) folgt.The aforementioned cross-section of the mouth is the cross-section of the mouth opening itself in FIG. 3, while in the remaining figures it is the cross-section still affecting the entire circumferential tube wall, the immediately following the obliquely cut mouth (FIG. 5) or the profiled mouth (FIG. 4 and 6 to 9) follows.

Ein Vorteil der strömungstechnisch günstigen Gestaltung des Führungsrohres besteht in der Möglichkeit, dadurch das durch den Luftaustritt entstehende Geräusch zu dämpfen.One advantage of the favorable flow design of the guide tube is the possibility of damping the noise caused by the air outlet.

Mit Fig. 2 ist gezeigt, daß die Düsenspinnvorrichtung auch in einer nach oben gerichteten Spinnrichtung verwendet werden kann. Gleiche Bauteile sind in dieser Variante mit denselben Bezugszeichen wie in Fig. 1 gekennzeichnet.2 shows that the nozzle spinning device can also be used in an upward spinning direction. In this variant, the same components are identified by the same reference numerals as in FIG. 1.

Eine nicht gezeigte Verwendung der Düsenspinn-Vorrichtung in horizontaler Lage ist ebenfalls möglich.A use, not shown, of the nozzle spinning device in a horizontal position is also possible.

Claims (8)

1. Jet spinning device with a pneumatic twisting nozzle (3) arranged downstream from a feed roller pair (2) in order to receive an unspun yarn delivered by the feed roller pair (2), and with a delivery roller pair (5) arranged after the twisting nozzle (3) to receive the spun yarn (12) delivered by the twisting nozzle (3), characterised in that the twisting nozzle (3) adjoins a pneumatic guide tube (4) which projects so close to the delivery roller pair (5) that the yarn (12) is forwarded into the converging space (19) of the delivery roller pair (5) and is thus automatically taken up by the delivery roller pair (5), the arrangement being such that the air flow section arising between the circumferential rim (18, 18.1, 18.2, 18.3, 18.4, 18.5, 18.6) of the opening of the pneumatic guide tube (4) and the cylindrical surface of the delivery roller pair (5) is not substantially smaller than a section of the opening of the pneumatic guide tube (4) measured at right angles to the direction of the flow.
2. Jet spinning device according to claim 1 characterised in that the pneumatic guide tube (4) has no sudden variations in cross section.
3. Jet spinning device according to claim 1 or 2 characterised in that the rim (18, 18.2) of the opening of the pneumatic guide tube (4) lies in a plane.
4. Jet spinning device according to claim 3 characterised in that the plane lies substantially parallel to an imaginary plane containing the axes of the delivery rollers (5).
5. Jet spinning device according to claim 1 or 2 characterised in that the rim (18.1, 18.3, 18.4, 18.5, 18.6) of the opening of the pneumatic guide tube (4) projects partly into the converging space (19) between the delivery rollers (5) and is substantially adapted to the cylindrical surface of the delivery roller pair (5).
6. Jet spinning device according to claim 5 characterised in that the spacing between the cylindrical surface of the delivery roller pair (5) and the rim (18.1, 18.3, 18.4, 18.5) of the opening of the pneumatic guide tube (4) is substantially constant around the tube periphery.
7. Jet spinning device according to claim 5 characterised in that the spacing between the cylindrical surface of the delivery roller pair (5) and the rim (18.6) of the opening of the guide tube (4) varies over the tube periphery.
8. Jet spinning device according to claim 7 characterised in that the spacing between the cylindrical surface of the delivery roller pair (5) and the rim (18.6) of the opening of the pneumatic guide tube (4) is smaller in the region of a first roller (5.1) of the delivery roller pair (5) lying closer to the downstream extremity of the guide tube (4) than in the region of a second roller (5.2) of the delivery roller pair (5) further from the said extremity.
EP83110769A 1982-10-29 1983-10-27 Air jet spinning device Expired EP0110150B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH631182 1982-10-29
CH6311/82 1982-10-29

Publications (2)

Publication Number Publication Date
EP0110150A1 EP0110150A1 (en) 1984-06-13
EP0110150B1 true EP0110150B1 (en) 1986-10-15

Family

ID=4307542

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EP83110769A Expired EP0110150B1 (en) 1982-10-29 1983-10-27 Air jet spinning device

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US (1) US4593521A (en)
EP (1) EP0110150B1 (en)
JP (1) JPS5988932A (en)
DE (1) DE3366975D1 (en)
IN (1) IN161964B (en)

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IN168013B (en) * 1985-10-31 1991-01-19 Rieter Ag Maschf
JPS62117830A (en) * 1985-11-15 1987-05-29 Murata Mach Ltd Apparatus for production of spun yarn
DE3541219A1 (en) * 1985-11-21 1987-05-27 Schubert & Salzer Maschinen METHOD AND DEVICE FOR SPINNING FIBERS
US4763822A (en) * 1985-12-23 1988-08-16 Fibron Machine Corporation Paper tail nip threader
DE3604819A1 (en) * 1986-02-15 1987-08-20 Bayer Ag PROMOTION OF FILAMENT COVERING THROUGH WIDE CONVEYOR
DE3638110C2 (en) * 1986-11-07 1995-06-14 Fritz Stahlecker Device for pneumatic false twist spinning
EP0413815A1 (en) * 1987-06-19 1991-02-27 Uzbexkoe Proizvodstvennoe Obiedinenie Textilnogo Mashinostroenia Device for making a self-twisted thread product
CH692623A5 (en) 1997-10-03 2002-08-30 Rieter Ag Maschf Spinnstrecktexturier- or draw texturing.
DE19813515A1 (en) * 1998-03-26 1999-10-07 Zinser Textilmaschinen Gmbh Device for moving a thread to a winding tube driven by a friction roller
US20190076856A1 (en) * 2015-12-29 2019-03-14 Arcelormittal Air Nozzle for Guiding a Steel Strip at the Exit from a Device for Shearing a Steel Sheet
EP4015682A1 (en) * 2020-12-18 2022-06-22 Saurer Intelligent Technology AG Work station of an air spinning machine and yarn guide element

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Also Published As

Publication number Publication date
JPS5988932A (en) 1984-05-23
DE3366975D1 (en) 1986-11-20
US4593521A (en) 1986-06-10
JPS6242052B2 (en) 1987-09-07
EP0110150A1 (en) 1984-06-13
IN161964B (en) 1988-03-05

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