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EP0534895B1 - Stretching chamber - Google Patents

Stretching chamber Download PDF

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Publication number
EP0534895B1
EP0534895B1 EP92810498A EP92810498A EP0534895B1 EP 0534895 B1 EP0534895 B1 EP 0534895B1 EP 92810498 A EP92810498 A EP 92810498A EP 92810498 A EP92810498 A EP 92810498A EP 0534895 B1 EP0534895 B1 EP 0534895B1
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EP
European Patent Office
Prior art keywords
chamber
stretching
liquid
stretching chamber
thread
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 - Lifetime
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EP92810498A
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German (de)
French (fr)
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EP0534895A1 (en
Inventor
Felix Graf
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Publication of EP0534895A1 publication Critical patent/EP0534895A1/en
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    • 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
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
    • D02J1/223—Stretching in a liquid bath
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/12—Stretch-spinning methods
    • D01D5/14—Stretch-spinning methods with flowing liquid or gaseous stretching media, e.g. solution-blowing

Definitions

  • the invention is in the field of textile technology and relates to a drawing chamber arrangement according to the preamble of the independent claim, as is known for example from US-A-3 002 804.
  • Synthetic filaments in particular linear polymer filaments (plain yarns) are stretched after extrusion in order to orient the molecules in the yarn direction. It has proven to be advantageous to use liquid baths for such stretching, in which the stretching is brought about by a combination of hydrodynamic and mechanical braking. In particular, it has proven to be advantageous to carry out the stretching in quasi-closed chambers (stretching chambers) in which a chamber liquid is circulated in a direction opposite to the thread. It has also proven to be advantageous to connect devices to such stretching chambers in which excess liquid carried by the thread out of the stretching chamber is separated. In the arrangement of the drawing chamber and separating device, several threads can also be drawn in parallel.
  • Stretching chambers for carrying out the stretching process are described, for example, in EP-A-0384886 by the same applicant. These are chambers that are closed except for narrow inlet and outlet channels for the threads and inlet and outlet channels for the chamber fluid.
  • the threads are guided at the entrance, at the exit and / or in the chamber via thread guide elements, on which mechanical friction occurs between the thread and the thread-guiding surface. This friction is small even at very high thread speeds, since the thread guide elements are immersed in the chamber liquid or the thread running over their surface is soaked with liquid.
  • FIG. 1 schematically shows an embodiment of the stretching chamber arrangement according to the invention. It essentially consists of a stretching chamber 1, a separation chamber 2 and a liquid tank 3.
  • the liquid is conveyed by a feed pump 4 through a feed line 5 with a valve 6 below into the stretching chamber 1 and from an overflow 1.3 on top of the stretching chamber 1 through a
  • the discharge line 7 is directed back into the tank 3.
  • the liquid is drawn off from the separation chamber 2 by a suction pump 8 through a suction line 9.
  • the draw chamber arrangement according to the invention now has a second feed line 10 for pre-moistening the threads.
  • This bypasses the valve 6 of the first feed line 5, so it cannot be shut off, and leads into the area of the thread inlet channel 11 of the draw chamber, advantageously in the thread running direction in front of the first thread guide element of the arrangement.
  • the second feed line 10 opens into the stationary part 1.1 of the stretching chamber.
  • the mouth openings (see also FIG. 2) of the second feed line 10 are directed against the threads running through the chamber and are so small that only a very small amount of the liquid can escape against the threads when the feed pump 4 is at full capacity, just enough to the Moisten threads and reduce friction on the following thread guide elements.
  • the liquid supply through the pre-moistening openings should amount to 2 to 30% of the thread weight running through.
  • An adjustment by the hole size, by an adjustable throttle 10.1 and / or by the feed pressure of the feed pump 4 is possible.
  • FIG. 2 shows a section through the area of the thread inlet channel 11 into an exemplary embodiment of a draw chamber 1 with pre-moistening.
  • the figure shows a section parallel to the thread running direction and perpendicular to the plane in which the threads run through the chamber. The entry of the threads F is clearly visible thereon.
  • the threads run through Separating elements 20 are spaced apart from one another into the thread inlet channel 11 of the draw chamber and are guided in the area of the thread inlet channel 11 before entering the draw chamber cavity 21 by two thread guide elements 22 and 23 and are slightly deflected in the process.
  • the pre-moistening openings 24 are arranged in the thread running direction in front of these two deflection points. In this exemplary embodiment, these are channels with an opening cross section of 0.2 ⁇ 1.5 mm.
  • both the thread guide elements 22 and 23 and the separating elements 20 are immersed in the chamber liquid, which extends into the overflow 1.3 on the stretching chamber, so that the friction generated thereon remains small.
  • the thread and / or the thread guide elements are sufficiently wetted by the liquid emerging from the pre-moistening openings 24 in order to prevent an intolerably high mechanical braking of the threads by dry friction.
  • Another embodiment variant is to lead the second feed line to known application thread guides which are arranged directly in front of the stretching chamber.
  • Such an arrangement of the pre-moistening means outside the stretching chamber can also prevent dry friction on the separating elements arranged in front of the thread inlet channel.
  • the device becomes significantly more complex, since appropriate means such as during application must be used to ensure that the pre-moistening liquid is applied to the threads in a precisely controlled amount, since any excess of liquid will contaminate the following apparatus.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Description

Die Erfindung liegt auf dem Gebiete der Textiltechnik und betrifft eine Streckkammeranordnung gemäss dem Oberbegriff des unabhängigen Patentanspruches, wie diese beispielsweise aus der US-A-3 002 804 bekannt ist.The invention is in the field of textile technology and relates to a drawing chamber arrangement according to the preamble of the independent claim, as is known for example from US-A-3 002 804.

Synthetische Filamente, insbesondere linear polymere Filamente (Glattgarne) werden nach der Extrusion gestreckt, um die Moleküle in Garnrichtung zu orientieren. Es hat sich als vorteilhaft erwiesen, für eine derartige Streckung Flüssigkeitsbäder zu verwenden, in denen die Streckung durch eine Kombination von hydrodynamischer und mechanischer Bremsung bewirkt wird. Insbesondere hat es sich als vorteilhaft erwiesen, die Streckung in quasi geschlossenen Kammern (Streckkammern) durchzuführen, in denen eine Kammerflüssigkeit in einer dem Faden entgegengesetzten Richtung zirkuliert wird. Ebenso hat es sich als vorteilhaft erwiesen, an derartige Streckkammern Vorrichtungen anzuschliessen, in denen überschüssige, vom Faden aus der Streckkammer mitgeführte Flüssigkeit, abgeschieden wird. In Anordnungen von Streckkammer und Abscheidevorrichtung können auch mehrere Fäden parallel gestreckt werden.Synthetic filaments, in particular linear polymer filaments (plain yarns) are stretched after extrusion in order to orient the molecules in the yarn direction. It has proven to be advantageous to use liquid baths for such stretching, in which the stretching is brought about by a combination of hydrodynamic and mechanical braking. In particular, it has proven to be advantageous to carry out the stretching in quasi-closed chambers (stretching chambers) in which a chamber liquid is circulated in a direction opposite to the thread. It has also proven to be advantageous to connect devices to such stretching chambers in which excess liquid carried by the thread out of the stretching chamber is separated. In the arrangement of the drawing chamber and separating device, several threads can also be drawn in parallel.

Streckkammern zur Durchführung des Streckprozesses sind beispielsweise in der EP-A-0384886 derselben Anmelderin beschrieben. Es sind dies Kammern, die bis auf enge Ein- und Ausgangskanäle für die Fäden und Zu- und Abführungskanäle für die Kammerflüssigkeit geschlossen sind. Die Fäden werden am Eingang, am Ausgang und/oder in der Kammer über Fadenführungselemente geführt, an denen eine mechanische Reibung zwischen Faden und fadenführender Oberfläche entsteht. Diese Reibung ist auch bei sehr hohen Fadengeschwindigkeiten klein, da die Fadenführungselemente in der Kammerflüssigkeit eingetaucht sind oder der über ihre Oberfläche laufende Faden mit Flüssigkeit getränkt ist.Stretching chambers for carrying out the stretching process are described, for example, in EP-A-0384886 by the same applicant. These are chambers that are closed except for narrow inlet and outlet channels for the threads and inlet and outlet channels for the chamber fluid. The threads are guided at the entrance, at the exit and / or in the chamber via thread guide elements, on which mechanical friction occurs between the thread and the thread-guiding surface. This friction is small even at very high thread speeds, since the thread guide elements are immersed in the chamber liquid or the thread running over their surface is soaked with liquid.

Vorrichtungen zum Abscheiden von überschüssiger Flüssigkeit von den Fäden sind beispielsweise beschrieben in der EP-A-0 457 719 (nicht vorveröffentlicht). Es handelt sich dabei ebenfalls um quasi geschlossene Kammern, in denen die Fäden mehrmals um einen kleinen Umlenkungswinkel umgelenkt werden, wobei die von den Fäden getrennte Flüssigkeit abgesaugt wird. Da die Vorrichtung zum Abscheiden überschüssiger Flüssigkeit meist unmittelbar an die Streckkammer anschliessend angeordnet ist, sind die Fäden beim Eintritt in diese Kammer ebenfalls mit Flüssigkeit getränkt, sodass auch in dieser Kammer die Reibung zwischen Faden und Fadenführungselementen (Umlenkungselementen) klein ist.Devices for separating excess liquid from the threads are described, for example, in EP-A-0 457 719 (not previously published). These are also quasi-closed chambers, in which the threads are deflected several times by a small deflection angle, the liquid separated from the threads being sucked off. Since the device for separating excess liquid is usually arranged directly adjacent to the drawing chamber, the threads are also impregnated with liquid when they enter this chamber, so that the friction between thread and thread guide elements (deflection elements) is also small in this chamber.

Beide genannten Patentschriften werden für die folgende Beschreibung als bekannt vorausgesetzt.Both of these patents are assumed to be known for the following description.

Probleme mit zu hoher mechanischer Reibung und daraus resultierender statischer Aufladung der Fäden entstehen beim Starten einer Anordnung mit Streckkammer und Abscheidekammer, wenn die Streckkammer noch nicht mit Kammerflüssigkeit gefüllt ist, die Fäden aber bereits und zwar in trockenem Zustand über alle Fadenführungselemente laufen und sich dadurch derart stark statisch aufladen, dass es schwierig oder gar unmöglich ist, sie nachher sauber separiert über nachfolgende Rollen zu leiten, oder dass sie sogar reissen können.Problems with excessive mechanical friction and the resulting static charging of the threads arise when starting an arrangement with a drawing chamber and separation chamber if the drawing chamber is not yet there Chamber fluid is filled, but the threads already run in a dry state over all thread guide elements and thus become so strongly statically charged that it is difficult or even impossible to guide them cleanly afterwards over subsequent rolls, or that they can even tear.

Es ist nun die Aufgabe der Erfindung eine Streckkammeranordnung zu schaffen, für die auch beim Anfahren keine Probleme mit trockener Reibung und daraus resultierender statischer Aufladung entstehen.It is now the object of the invention to provide a stretching chamber arrangement for which there are no problems with dry friction and the resulting static charge even when starting up.

Diese Aufgabe wird gelöst durch die Streckkammeranordnung gemäss dem kennzeichnenden Teil des unabhängigen Patentanspruches. Die erfindungsgemässe Streckkammeranordnung wird anhand der folgenden Figuren detailliert beschrieben. Dabei zeigen:

Figur 1
ein Schema einer beispielhaften Ausführungsform der erfindungsgemässen Streckkammeranordnung;
Figur 2
einen Schnitt durch die Eingangspartie der Streckkammer, parallel zur Fadenlaufrichtung und senkrecht zur Ebene, in der die Fäden die Streckkammer durchlaufen.
This object is achieved by the stretching chamber arrangement according to the characterizing part of the independent patent claim. The stretching chamber arrangement according to the invention is described in detail with reference to the following figures. Show:
Figure 1
a schematic of an exemplary embodiment of the stretching chamber arrangement according to the invention;
Figure 2
a section through the entrance part of the drawing chamber, parallel to the direction of yarn and perpendicular to the plane in which the threads pass through the drawing chamber.

Die erfindungsgemässe Streckkammeranordnung weist Mittel auf, mit denen die durch die Streck- und die Abscheidekammer laufenden Fäden während dem Einziehen der Fäden und während dem Füllen der Streckkammer mit Kammerflüssigkeit vorbefeuchtet werden. Mit Hilfe der Vorbefeuchtungsmittel werden die in die Kammern einlaufenden Fäden vor dem ersten Führungselement, über das sie mit Reibung laufen, mit Kammerflüssigkeit befeuchtet und zwar unbeachtet davon, ob die Kammern offen oder geschlossen sind.The draw chamber arrangement according to the invention has means with which the threads running through the draw and separation chamber are pre-moistened during the drawing in of the threads and during the filling of the draw chamber with chamber liquid. With the help of the pre-moistening agent, the threads entering the chambers are moistened with chamber fluid in front of the first guide element, over which they run with friction, regardless of whether the chambers are open or closed.

Figur 1 zeigt schematisch eine Ausführungsform der erfindungsgemässen Streckkammeranordnung. Sie besteht im wesentlichen aus einer Streckkammer 1, einer Abscheidekammer 2 und einem Flüssigkeitstank 3. Die Flüssigkeit wird durch eine Förderpumpe 4 durch eine Zuführungsleitung 5 mit einem Ventil 6 unten in die Streckkammer 1 gefördert und von einem Überlauf 1.3 oben auf der Streckkammer 1 durch eine Abführungsleitung 7 wieder in den Tank 3 geleitet. Aus der Abscheidekammer 2 wird die Flüssigkeit mit einer Absaugpumpe 8 durch eine Absaugleitung 9 abgesaugt. FIG. 1 schematically shows an embodiment of the stretching chamber arrangement according to the invention. It essentially consists of a stretching chamber 1, a separation chamber 2 and a liquid tank 3. The liquid is conveyed by a feed pump 4 through a feed line 5 with a valve 6 below into the stretching chamber 1 and from an overflow 1.3 on top of the stretching chamber 1 through a The discharge line 7 is directed back into the tank 3. The liquid is drawn off from the separation chamber 2 by a suction pump 8 through a suction line 9.

Die Streckkammer 1 und die Abscheidekammer 2 bestehen vorteilhafterweise je aus zwei Teilen (1.1, 1.2 bzw. 2.1, 2.2) derart, dass die Kammern sich parallel zur Ebene, in der die Fäden F die Kammern im wesentlichen durchlaufen, öffnen lassen. Dabei bleibt derjenige Teil (1.1 bzw. 2.2) der Kammern, der die Zuführungsleitung 5 und Abführungsleitung 7 bzw. die Absaugleitung 9 trägt, vorteilhafterweise stationär, während der andere Teil (1.2 bzw. 2.2) aufgeklappt wird.The drawing chamber 1 and the separating chamber 2 advantageously each consist of two parts (1.1, 1.2 or 2.1, 2.2) such that the chambers can be opened parallel to the plane in which the threads F essentially pass through the chambers. The part (1.1 or 2.2) of the chambers which carries the feed line 5 and discharge line 7 or the suction line 9 advantageously remains stationary, while the other part (1.2 or 2.2) is opened.

Zur Vorbefeuchtung der Fäden weist nun die erfindungsgemässe Streckkammeranordnung eine zweite Zuführungsleitung 10 auf. Diese bypassiert das Ventil 6 der ersten Zuführungsleitung 5, kann also nicht abgesperrt werden, und führt in den Bereich des Fadeneingangskanales 11 der Streckkammer, vorteilhafterweise in Fadenlaufrichtung vor das erste Fadenführungselement der Anordnung. Die zweite Zuführungsleitung 10 mündet wie die anderen Flüssigkeitsleitungen (5, 7, 9) in den stationären Teil 1.1 der Streckkammer. Die Mündungsöffnungen (siehe auch Figur 2) der zweiten Zuführungsleitung 10 sind gegen die durch die Kammer laufenden Fäden gerichtet und sind derart klein, dass bei voller Leistung der Förderpumpe 4 nur eine sehr kleine Menge der Flüssigkeit gegen die Fäden austreten kann, gerade genug, um die Fäden zu befeuchten und die Reibung an den folgenden Fadenführungselementen herabzusetzen.The draw chamber arrangement according to the invention now has a second feed line 10 for pre-moistening the threads. This bypasses the valve 6 of the first feed line 5, so it cannot be shut off, and leads into the area of the thread inlet channel 11 of the draw chamber, advantageously in the thread running direction in front of the first thread guide element of the arrangement. Like the other liquid lines (5, 7, 9), the second feed line 10 opens into the stationary part 1.1 of the stretching chamber. The mouth openings (see also FIG. 2) of the second feed line 10 are directed against the threads running through the chamber and are so small that only a very small amount of the liquid can escape against the threads when the feed pump 4 is at full capacity, just enough to the Moisten threads and reduce friction on the following thread guide elements.

Zum Anfahren der Anordnung wird nun wie folgt vorgegangen:

  • Die Kammern werden ohne durchlaufende Fäden geschlossen, das Ventil 6 geöffnet, die Förderpumpe 4 und die Absaugpumpe 8 gestartet, das heisst, Flüssigkeit zirkuliert von der ersten Zuführungsleitung 5 durch die Streckkammer 1 zur Abführungsleitung 7. Sie wird auch durch die zweite Zuführungsleitung 10 gefördert und tritt aus den Vorbefeuchtungsöffnungen aus, was den Flüssigkeitskreislauf nicht wesentlich beeinflusst. Ein Teil der Flüssigkeit verlässt die Streckkammer 1 durch den Fadenaustrittskanal 12 in die Abscheidekammer 2 und wird aus dieser durch die Absaugpumpe 8 abgesaugt.
  • Wenn die Flüssigkeit im Tank 3 und in der Streckkammer 1 die Solltemperatur erreicht hat, wird das Ventil 6 geschlossen, sodass der Streckkammer 1 nur noch Flüssigkeit durch die zweite Zuführungsleitung 10 zufliesst, die durch den Fadenausgangskanal 12 abfliesst und von der Absaugpumpe 8 abgesaugt wird.
  • Sobald die Streckkammer 1 leer ist, können die Kammern 1 und 2 geöffnet werden. Aus den Vorbefeuchtungsöffnungen tritt immer noch Flüssigkeit aus, läuft den stationären Kammerteilen 1.1 und 2.1 entlang nach unten und wird in die Absaugleitung 9 gesaugt, sodass die Fadenführungselemente in den stationären Kammerteilen benetzt bleiben.
  • Die Fäden werden mit einer Saugpistole auf den stationären Kammerteilen 1.1 und 2.2 aufgelegt und über die erste Streckrolle, die auf die Streckkammeranordnung folgt, gelegt.
  • Die Kammern 1 und 2 werden geschlossen, wodurch vor allem in der Abscheidekammer 2 die Reibung durch vermehrte Umlenkung stark ansteigt.
  • Das Ventil 6 wird geöffnet, sodass sich die Streckkammer 1 mit Flüssigkeit füllt.
  • Wenn im Überlauf 1.1 der Streckkammer 1 ein genügendes Niveau erreicht ist, werden die Fäden mit der Saugpistole auf dem Spuler aufgebracht und es kann zu automatischem Betrieb übergegangen werden.
To start up the arrangement, proceed as follows:
  • The chambers are closed without threads running through, the valve 6 opened, the feed pump 4 and the suction pump 8 started, that is to say liquid circulates from the first feed line 5 through the draw chamber 1 to the discharge line 7. It is also conveyed through the second feed line 10 and emerges from the pre-humidification openings, which does not significantly affect the liquid circuit. Some of the liquid leaves the drawing chamber 1 through the thread outlet channel 12 into the separating chamber 2 and is sucked out of it by the suction pump 8.
  • When the liquid in the tank 3 and in the stretching chamber 1 has reached the desired temperature, the valve 6 is closed, so that only liquid flows to the stretching chamber 1 through the second feed line 10, which flows through the thread outlet channel 12 and is sucked off by the suction pump 8.
  • As soon as the stretching chamber 1 is empty, the chambers 1 and 2 can be opened. Liquid still emerges from the pre-moistening openings, runs down the stationary chamber parts 1.1 and 2.1 and is sucked into the suction line 9, so that the thread guide elements in the stationary chamber parts remain wetted.
  • The threads are placed on the stationary chamber parts 1.1 and 2.2 with a suction gun and placed over the first drawing roller that follows the drawing chamber arrangement.
  • The chambers 1 and 2 are closed, as a result of which the friction in the separating chamber 2 increases sharply due to increased deflection.
  • The valve 6 is opened so that the stretching chamber 1 fills with liquid.
  • When a sufficient level is reached in the overflow 1.1 of the draw chamber 1, the threads are applied to the winder with the suction gun and automatic operation can be started.

Es hat sich gezeigt, dass für die Vorbefeuchtung die Flüssigkeit vorteilhafterweise pro Faden aus je einer Vorbefeuchtungsöffnung gegen die Fäden gefördert wird, wobei die Vorbefeuchtungsöffnungen mindestens so breit wie die Fibrillenbändchen sind. Die Querschnittsfläche der Vorbefeuchtungsöffnungen wird so bemessen, dass die Flüssigkeit aus den Öffnungen hervorquillt und nicht in einem Strahl hervorspritzt. Nur so kann bei geöffneter Kammer die aus den Vorbefeuchtungsöffnungen austretende Flüssigkeit sicher in die Absaugleitung der Abscheidekammer gesaugt werden.It has been shown that for the pre-moistening the liquid is advantageously conveyed against the threads per thread from a pre-moistening opening, the pre-moistening openings being at least as wide as the fibril bands. The cross-sectional area of the pre-moistening openings is dimensioned such that the liquid oozes out of the openings and does not splash out in a jet. This is the only way that the liquid emerging from the pre-humidification openings can be safely drawn into the suction line of the separation chamber when the chamber is open.

Die Flüssigkeitszufuhr durch die Vorbefeuchtungsöffnungen soll 2 bis 30% des durchlaufenden Fadengewichtes betragen. Eine Justierung durch die Lochgrösse, durch eine einstellbare Drossel 10.1 und/oder durch den Speisedruck der Förderpumpe 4 ist möglich.The liquid supply through the pre-moistening openings should amount to 2 to 30% of the thread weight running through. An adjustment by the hole size, by an adjustable throttle 10.1 and / or by the feed pressure of the feed pump 4 is possible.

Um Verstopfungen der Vorbefeuchtungsöffnungen zu vermeiden, ist es vorteilhaft, die Kammerflüssigkeit in einem entsprechenden Filter 10.2 von Verunreinigungen zu befreien, bevor sie durch die Vorbefeuchtungsöffnungen gefördert wird.In order to avoid clogging of the pre-moistening openings, it is advantageous to remove impurities from the chamber liquid in a corresponding filter 10.2 before it is conveyed through the pre-moistening openings.

Figur 2 zeigt einen Schnitt durch den Bereich des Fadeneintrittkanales 11 in eine beispielhafte Ausführungsform einer Streckkammer 1 mit Vorbefeuchtung. Die Figur stellt einen Schnitt parallel zur Fadenlaufrichtung und senkrecht zur Ebenen in der die Fäden durch die Kammer laufen, dar. Es ist darauf deutlich der Einlauf der Fäden F sichtbar. Die Fäden laufen durch Trennelemente 20 voneinander beabstandet in den Fadeneinlaufkanal 11 der Streckkammer ein und werden im Bereiche des Fadeneinlaufkanales 11 vor dem Eintritt in den Streckkammerhohlraum 21 durch zwei Fadenführungselemente 22 und 23 geführt und dabei leicht umgelenkt. In Fadenlaufrichtung vor diesen beiden Umlenkstellen sind die Vorbefeuchtungsöffnungen 24 angeordnet. Es handelt sich in dieser beispielhaften Ausführungsform um Kanäle mit einem Öffnungsquerschnitt von 0,2x1,5mm. FIG. 2 shows a section through the area of the thread inlet channel 11 into an exemplary embodiment of a draw chamber 1 with pre-moistening. The figure shows a section parallel to the thread running direction and perpendicular to the plane in which the threads run through the chamber. The entry of the threads F is clearly visible thereon. The threads run through Separating elements 20 are spaced apart from one another into the thread inlet channel 11 of the draw chamber and are guided in the area of the thread inlet channel 11 before entering the draw chamber cavity 21 by two thread guide elements 22 and 23 and are slightly deflected in the process. The pre-moistening openings 24 are arranged in the thread running direction in front of these two deflection points. In this exemplary embodiment, these are channels with an opening cross section of 0.2 × 1.5 mm.

Während dem Betrieb sind sowohl die Fadenführungselemente 22 und 23 als auch die Trennelemente 20 in der Kammerflüssigkeit eingetaucht, die bis in den Überlauf 1.3 auf der Streckkammer reicht, sodass die daran erzeugte Reibung klein bleibt. Solange beim Anfahren das Flüssigkeitsniveau den Überlauf noch nicht erreicht hat, wird der Faden und/oder die Fadenführungselemente durch die aus den Vorbefeuchtungsöffnungen 24 austretende Flüssigkeit genügend benetzt, um eine nicht tolerierbar hohe mechanische Bremsung der Fäden durch trockene Reibung zu verhindern.During operation, both the thread guide elements 22 and 23 and the separating elements 20 are immersed in the chamber liquid, which extends into the overflow 1.3 on the stretching chamber, so that the friction generated thereon remains small. As long as the liquid level has not yet reached the overflow during start-up, the thread and / or the thread guide elements are sufficiently wetted by the liquid emerging from the pre-moistening openings 24 in order to prevent an intolerably high mechanical braking of the threads by dry friction.

Eine weitere Ausführungsvariante besteht darin, die zweite Zuführungsleitung auf bekannte Applikationsfadenführer zu führen, die unmittelbar vor der Streckkammer angeordnet sind. Durch eine derartige Anordnung der Vorbefeuchtungsmittel ausserhalb der Streckkammer kann trockene Reibung auch an den vor dem Fadeneinlaufkanal angeordneten Trennelementen verhindert werden. Die Vorrichtung wird aber bedeutend aufwendiger, denn es muss mit entsprechenden Mitteln wie bei der Applikation dafür gesorgt werden, dass die Vorbefeuchtungsflüssigkeit in genau kontrollierter Menge auf die Fäden aufgebracht wird, da jeder Überschuss an Flüssigkeit die folgende Apparatur verschmutzen wird.Another embodiment variant is to lead the second feed line to known application thread guides which are arranged directly in front of the stretching chamber. Such an arrangement of the pre-moistening means outside the stretching chamber can also prevent dry friction on the separating elements arranged in front of the thread inlet channel. However, the device becomes significantly more complex, since appropriate means such as during application must be used to ensure that the pre-moistening liquid is applied to the threads in a precisely controlled amount, since any excess of liquid will contaminate the following apparatus.

Claims (9)

  1. A stretching chamber arrangement with a stretching chamber (1) for the stretching of a thread (F) guided through the chamber (1), with a liquid supply (5, 10) and a liquid discharge (8, 9) through which the chamber liquid is circulated, characterized in that the arrangement comprises preliminary moistening means (10, 24) which are independent of the filling level of the stretching chamber (1) and with which the threads (F) entering the stretching chamber are moistened prior to their entry into the hollow space (21) of the stretching chamber and prior to the filling of the chamber with chamber liquid.
  2. A stretching chamber arrangement as claimed in claim 1, characterized in that it is provided with a liquid circulation substantially consisting of a first lockable feed line (5) into the stretching chamber (1), a discharge line (7) from the stretching chamber (1), a liquid tank (3) and a pumping means (4) and that it is provided with a second feed line (10) which by-passes the locking means (6) of the first feed line (5) and ends in the zone of the thread inlet ducts (11) of the stretching chamber in at least one preliminary moistening opening facing the passing threads.
  3. A stretching chamber arrangement as claimed in claim 2, characterized in that the preliminary moistening openings (24) are arranged in the thread inlet duct (11) of the stretching chamber.
  4. A stretching chamber arrangement as claimed in claim 3, characterized in that the stretching chamber (1) comprises a stationary part (1.1) and a part (1.2) which is swivellable towards the stationary part and that the preliminary moistening openings (24) are arranged in the stationary chamber part (1.1).
  5. A stretching chamber arrangement as claimed in claim 4, characterized in that one preliminary moistening opening (24) is provided for each thread passing through the stretching chamber and that the openings are arranged horizontally mutually adjacent at distances corresponding substantially to the distances between the threads.
  6. A stretching chamber arrangement as claimed in claim 5, characterized in that a liquid quantity is conveyed which corresponds to 2 to 30 % of the passing thread weight.
  7. A stretching chamber arrangement as claimed in one of the claims 2 to 6, characterized in that it is provided with an adjustable throttle (10.1) with which the liquid quantity which is conveyed through the preliminary moistening openings can be adjusted.
  8. A stretching chamber arrangement as claimed in one of the claims 2 to 7, characterized in that it is provided with a filter (10.2) as a result of which the liquid is relieved of impurities before it is conveyed through the preliminary moistening openings.
  9. A stretching chamber arrangement as claimed in claim 1, characterized in that it comprises one application thread guide for each thread in the thread running direction immediately before the thread inlet duct, which thread guide is supplied with chamber liquid.
EP92810498A 1991-09-23 1992-06-30 Stretching chamber Expired - Lifetime EP0534895B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2820/91 1991-09-23
CH2820/91A CH683923A5 (en) 1991-09-23 1991-09-23 A stretching chamber arrangement.

Publications (2)

Publication Number Publication Date
EP0534895A1 EP0534895A1 (en) 1993-03-31
EP0534895B1 true EP0534895B1 (en) 1996-02-07

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Application Number Title Priority Date Filing Date
EP92810498A Expired - Lifetime EP0534895B1 (en) 1991-09-23 1992-06-30 Stretching chamber

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US (1) US5386618A (en)
EP (1) EP0534895B1 (en)
JP (1) JPH05222642A (en)
CH (1) CH683923A5 (en)
DE (1) DE59205290D1 (en)

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CN106435786A (en) * 2016-10-24 2017-02-22 中复神鹰碳纤维有限责任公司 Vapor saturation degree online control device and method

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WO1998001606A1 (en) * 1996-07-04 1998-01-15 Barmag Ag Wet spinning method and device
DE10060300A1 (en) * 1999-12-10 2001-06-21 Rieter Ingolstadt Spinnerei Drafting of textile fibers, e.g. on drawframe, comprises use of fluids to accelerate fibers and apply the required drafting forces
KR100740012B1 (en) * 2002-07-09 2007-07-16 서옥교 Method for manufacturing stretch preshrunk worsted yarn, stretch preshrunk worsted yarn and low speed stretching device

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
CN106435786A (en) * 2016-10-24 2017-02-22 中复神鹰碳纤维有限责任公司 Vapor saturation degree online control device and method
CN106435786B (en) * 2016-10-24 2020-01-21 中复神鹰碳纤维有限责任公司 A device and method for online control of steam saturation

Also Published As

Publication number Publication date
CH683923A5 (en) 1994-06-15
DE59205290D1 (en) 1996-03-21
US5386618A (en) 1995-02-07
EP0534895A1 (en) 1993-03-31
JPH05222642A (en) 1993-08-31

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