EP0383722A2 - Interlacing jet for interlacing multifilament yarns - Google Patents

Interlacing jet for interlacing multifilament yarns Download PDF

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Publication number
EP0383722A2
EP0383722A2 EP90810076A EP90810076A EP0383722A2 EP 0383722 A2 EP0383722 A2 EP 0383722A2 EP 90810076 A EP90810076 A EP 90810076A EP 90810076 A EP90810076 A EP 90810076A EP 0383722 A2 EP0383722 A2 EP 0383722A2
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EP
European Patent Office
Prior art keywords
baffle
section
wall section
nozzle
yarn channel
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
EP90810076A
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German (de)
French (fr)
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EP0383722B1 (en
EP0383722A3 (en
Inventor
Helmut Ritter
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.)
Heberlein AG
Heberlein and Co AG
Original Assignee
Heberlein and Co AG
Heberlein Maschinenfabrik AG
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Publication date
Application filed by Heberlein and Co AG, Heberlein Maschinenfabrik AG filed Critical Heberlein and Co AG
Publication of EP0383722A2 publication Critical patent/EP0383722A2/en
Publication of EP0383722A3 publication Critical patent/EP0383722A3/en
Application granted granted Critical
Publication of EP0383722B1 publication Critical patent/EP0383722B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • 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
    • D02J1/08—Interlacing constituent filaments without breakage thereof, e.g. by use of turbulent air streams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J1/00—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies
    • B41J1/22—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies with types or dies mounted on carriers rotatable for selection
    • B41J1/24—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies with types or dies mounted on carriers rotatable for selection the plane of the type or die face being perpendicular to the axis of rotation

Definitions

  • the invention relates to a intermingling nozzle for intermingling multifilament yarns, with a continuous yarn channel into which at least one air supply bore and a threading slot open laterally.
  • the threading slot is in some cases when the yarn is delivered without interruption at high speed, e.g. on a spinning machine, necessary so that the yarn can be inserted into the yarn channel from the side during the run.
  • a threading slot In known intermingling nozzles with a threading slot, however, there is a risk that filaments and filament bundles, which are guided along the yarn duct wall in places with the air stream, will strike the edges of the threading slot and / or enter the threading slot. This then very easily leads to damage to the yarn, filament breaks and loop formation are not uncommon, especially with today's trend towards finer filaments.
  • swirling nozzles with a threading slot which can be opened for the thread insertion process and then closed again during operation, for example in accordance with CH-A-661 753.
  • swirling nozzles with moving parts are not suitable for high speeds and wet operation, e.g. yarns with freshly applied spin finishes or spin finish, because spin finishes with filament particles can be deposited between moving surfaces and impair their function (e.g. seal).
  • operating errors are of course also possible with swirling nozzles with movable parts.
  • the object of the invention is therefore to provide a swirling nozzle of the type specified at the outset, which does not require any moving parts, but avoids the risk of filament damage from the threading slot.
  • the intermingling nozzle according to the invention is characterized in that the wall of the yarn channel has two cylindrical wall sections, namely a baffle wall section opposite the mouth of the air supply bore and a nozzle wall section adjacent to the mouth of the air supply bore, the threading slot between the baffle wall section and the Nozzle wall section opens into the yarn channel, and that the tangential plane containing the mouth edge of the threading slot located in the baffle wall section passes through the nozzle wall section to the baffle wall section.
  • the swirling nozzle shown in FIGS. 1 and 2 has a nozzle body 1 and an impact body 2 which are fastened to one another.
  • the two bodies 1 and 2 could also be formed in one piece.
  • a continuous yarn channel 3 is recessed into which a threading slot 4 and an air supply bore 5 open laterally.
  • a running multifilament yarn (not shown) is guided through the yarn channel 3, the filaments of which are swirled together in places in the yarn channel by the blown air stream emerging from the air supply bore 5.
  • the yarn channel 3.1 of an embodiment of the intermingling nozzle according to the invention, with the threading slot 4 and the air supply bore 5, is shown on a larger scale in FIG. 3.
  • the wall of the yarn channel 3.1 contains a circular cylindrical baffle section 6.1 which, symmetrical with respect to the plane E containing the axis of the air supply bore 5 and parallel to the longitudinal direction of the yarn channel 3.1, extends from the upper mouth edge 7 of the threading slot 4 to an end edge 8 symmetrically opposite this mouth edge 7 extends, and also a circular cylindrical nozzle wall section 9.1, which, again symmetrically with respect to the plane E, extends from the lower mouth edge 10 of the threading slot 4 to an end edge 11 symmetrically opposite the mouth edge 10.
  • the axis of curvature A6 of the baffle section 6.1 and the axis of curvature A9 of the nozzle wall section 9.1 run parallel to one another at a distance from one another, and the radius of curvature R6 of the baffle section 6.1 is smaller than the radius of curvature R9 of the nozzle wall section 9.1, in such a way that those in the mouth edge 7 on the baffle section 6.1 placed tangential plane T goes through the nozzle wall section 9.1.
  • the mouth edge 10 of the threading slot 4 located in the nozzle wall section 9.1 is therefore - seen from the inside of the yarn channel 3.1 - outside the tangential plane T.
  • the part of the air flow emerging from the air supply bore 5 occurs, which is indicated schematically by the baffle wall section 6.1 as shown in FIG. 4 Mouth edge 7 is deflected out and which leaves the baffle section 6.1 at this mouth edge 7 approximately in the direction of the tangential plane T, does not enter the threading slot 4, but flows to the nozzle wall section 9.1, which further the air flow part from Threading slot 4 steers away.
  • the angle ⁇ between the sides of the tangential plane T and the nozzle wall section 9.1 facing the baffle section 6.1 is an obtuse angle.
  • FIG. 5 shows schematically the conditions in a known swirling nozzle with a baffle wall section 6.2 and a nozzle wall section 9.2, which lie on a common circular cylinder surface.
  • the tangential plane T placed in the mouth edge 7 on the baffle section 6.2 passes through the lower boundary wall 14 of the threading slot 4.
  • the partial air flow which leaves the baffle section 6.2 at the mouth edge 7 in the direction of the tangential plane T is therefore directed towards the lower mouth edge 10 of the threading slot 4 and is partially guided by this into the threading slot 4.
  • the symmetry of the yarn channel described with reference to FIG. 3 with respect to the plane E in preferred embodiments of the intermingling nozzle according to the invention entails that the tangential plane T.1 placed in the end edge 8 on the baffle wall section 6.1 forms the same angle with the plane of symmetry E and with the nozzle wall section 9.1 like the tangential plane T. Therefore, the air flow shown schematically in FIG. 4 in the yarn channel 3.1 is also essentially symmetrical with respect to the plane E.
  • the symmetrical air flow counteracts a tendency for the multifilament yarn to be intermingled to move laterally, for example towards the threading slot 4.
  • the transition wall section 12.1 should not extend into the air flow, that is to say it should lie outside the tangential plane T.1, viewed from the inside of the yarn channel 3.1.
  • a certain disturbance in the symmetry of the air flow in the yarn duct can result from the fact that air emerges from the yarn channel through the threading slot 4, in particular in the region of the ends of the yarn channel. This disturbance is counteracted with the embodiment according to FIG. 6.
  • the yarn channel 3.1 has the same shape as in Fig. 3, with the baffle section 6.1 and the nozzle wall section 9.1.
  • the transition wall section 12.1 shown in FIG. 3 in FIG. 6 is replaced by the opening of a slot 15 which is essentially symmetrical with respect to the plane E and is in relation to the plane E and which starts from a relief channel 16.
  • the threading slot 4 has boundary walls 13.1 and 14.1, which are preferably approximately at right angles to the plane E.
  • the baffle section 6.1 and the nozzle wall section 9.1 are each approximately circular cylindrical. However, this is not mandatory, the wall sections could also have other continuously rounded cylindrical shapes, e.g. oval or roughly elliptical in cross-section.
  • the threading slot 4 and the air supply bore 5 open laterally into the thread channel 3.3.
  • the wall of the thread channel 3.3 contains a circular-cylindrical baffle wall section 6.3 which, also here symmetrically with respect to the plane E, is symmetrical from the upper mouth edge 7 of the threading slot 4 to this mouth edge 7 opposite end edge 8 extends, and a cylindrical, approximately elliptical arc-shaped nozzle wall section 9.3, which extends from the lower mouth edge 10 of the threading slot 4 to the end edge 11, which is opposite the mouth edge 10 symmetrically with respect to the plane E.
  • transition wall section 12.3 which in this embodiment can be flat, for example.
  • the tangential plane T placed in the mouth edge 7 on the baffle section 6.3 also does not run into the threading slot 4 here, but goes through its mouth edge 10 and thus through the nozzle wall section 9.3, which starts from this mouth edge.
  • the baffle section and the nozzle wall section of the yarn channel do not lie on a common circular cylindrical surface, but each have their own cylindrical shape, also gives the advantageous possibility of determining the ratio between the width of the yarn channel (measured perpendicular to the plane of symmetry E) to vary the height of the yarn channel (measured perpendicular to the width, ie in plane E).
  • the width of the yarn channel is greater than its height.
  • the intermingling nozzles according to the invention can advantageously be used on spinning machines, in particular for intermingling pre-oriented multifilament yarns (POY), but also of ready-oriented (FOY) and fully drawn (FDY) multifilament yarns.
  • POY pre-oriented multifilament yarns
  • FOY ready-oriented multifilament yarns
  • FDY fully drawn

Abstract

The interlacing jet has a continuous yarn channel (3.1), into which open laterally an air feed bore (5) and a threading slit (4). The wall of the yarn channel (3.1) contains two cylindrical, for example circular-cylindrical wall portions, namely a baffle-wall portion (6.1) located opposite the air feed bore (5) and a nozzle-wall portion (9.1) adjacent to the air feed bore (5). The threading slit (4) opens out between the baffle-wall portion (6.1) and the nozzle-wall portion (9.1). The tangential plane (T) to the baffle-wall portion (6.1) at the edge (7) of the mouth of the threading slit (4) passes through the nozzle-wall portion (9.1). This ensures that the part of the airstream coming out of the air feed bore (5) and being deflected by the baffle-wall portion (6.1) towards the mouth edge (7) of the threading slit (4) and then leaving the baffle-wall portion (6.1) in the direction of the tangential plane (T) does not enter the threading slit (4). This reduces the danger of damage to filaments and filament bundles, since these are not blown into the threading slit (4). …<IMAGE>…

Description

Die Erfindung bezieht sich auf eine Verwirbe­lungsdüse zum Verwirbeln von Multifilamentgarnen, mit einem durchgehenden Garnkanal, in welchen wenigstens eine Luftzufuhrbohrung und ein Einfädelschlitz seit­lich einmünden.The invention relates to a intermingling nozzle for intermingling multifilament yarns, with a continuous yarn channel into which at least one air supply bore and a threading slot open laterally.

Der Einfädelschlitz ist in manchen Fällen, wenn das Garn ohne Unterbrechung mit hoher Geschwindigkeit angeliefert wird, wie z.B. an einer Spinnmaschine, erforderlich, damit das Garn während des Laufs von der Seite her in den Garnkanal eingelegt werden kann. Bei bekannten Verwirbelungsdüsen mit Einfädelschlitz besteht jedoch die Gefahr, dass Filamente und Fila­mentbündel, die mit dem Luftstrom stellenweise an der Garnkanalwand entlanggeführt werden, auf die Kanten des Einfädelschlitzes auftreffen und/oder in den Ein­fädelschlitz eintreten. Das führt dann sehr leicht zu Beschädigungen des Garns, Filamentbrüche und Schlau­fenbildung sind keine Seltenheit, besonders beim heu­tigen Trend zu feineren Filamenten.The threading slot is in some cases when the yarn is delivered without interruption at high speed, e.g. on a spinning machine, necessary so that the yarn can be inserted into the yarn channel from the side during the run. In known intermingling nozzles with a threading slot, however, there is a risk that filaments and filament bundles, which are guided along the yarn duct wall in places with the air stream, will strike the edges of the threading slot and / or enter the threading slot. This then very easily leads to damage to the yarn, filament breaks and loop formation are not uncommon, especially with today's trend towards finer filaments.

Es ist auch schon vorgeschlagen worden, Verwir­belungsdüsen mit einem Einfädelschlitz zu versehen, der für den Garneinlegevorgang geöffnet und dann während des Betriebes wieder geschlossen werden kann, z.B. gemäss CH-A-661 753. Solche Verwirbelungsdüsen mit beweglichen Teilen eignen sich jedoch nicht für hohe Geschwindigkeiten und Nassbetrieb, z.B. Garne mit frisch aufgebrachten Spinnpräparationen oder Spinnfinish, weil sich Spinnpräparation mit Filament­teilchen zwischen beweglichen Flächen ablagern und deren Funktion (z.B. Dichtung) beeinträchtigen kann. Ausserdem sind bei Verwirbelungsdüsen mit bewegbaren Teilen natürlich auch Bedienungsfehler möglich.It has also already been proposed to provide swirling nozzles with a threading slot which can be opened for the thread insertion process and then closed again during operation, for example in accordance with CH-A-661 753. However, such swirling nozzles with moving parts are not suitable for high speeds and wet operation, e.g. yarns with freshly applied spin finishes or spin finish, because spin finishes with filament particles can be deposited between moving surfaces and impair their function (e.g. seal). In addition, operating errors are of course also possible with swirling nozzles with movable parts.

Die Aufgabe der Erfindung besteht daher darin, eine Verwirbelungsdüse der eingangs angegebenen Art zu schaffen, welche keine beweglichen Teile benötigt, die Gefahr der Beschädigung von Filamenten durch den Einfädelschlitz jedoch vermeidet.The object of the invention is therefore to provide a swirling nozzle of the type specified at the outset, which does not require any moving parts, but avoids the risk of filament damage from the threading slot.

Die erfindungsgemässe Verwirbelungsdüse, mit der die Aufgabe gelöst wird, ist dadurch gekennzeichnet, dass die Wand des Garnkanals zwei zylindrische Wand­abschnitte aufweist, nämlich einen der Einmündung der Luftzufuhrbohrung gegenüberliegenden Prallwandab­schnitt und einen der Einmündung der Luftzufuhrbohrung benachbarten Düsenwandabschnitt, wobei der Einfädel­schlitz zwischen dem Prallwandabschnitt und dem Düsen­wandabschnitt in den Garnkanal mündet, und dass die den im Prallwandabschnitt liegenden Mündungsrand des Einfädelschlitzes enthaltende Tangentialebene an den Prallwandabschnitt durch den Düsenwandabschnitt geht.The intermingling nozzle according to the invention, with which the object is achieved, is characterized in that the wall of the yarn channel has two cylindrical wall sections, namely a baffle wall section opposite the mouth of the air supply bore and a nozzle wall section adjacent to the mouth of the air supply bore, the threading slot between the baffle wall section and the Nozzle wall section opens into the yarn channel, and that the tangential plane containing the mouth edge of the threading slot located in the baffle wall section passes through the nozzle wall section to the baffle wall section.

In bekannten Verwirbelungsdüsen liegen alle Wand­abschnitte der Garnkanalwand auf einer gemeinsamen Zylinderfläche, in der Regel Kreiszylinderfläche, mit der Unterbrechung durch den Einfädelschlitz. Der aus der Luftzufuhrbohrung austretende Luftstrom trifft auf den der Luftzufuhrbohrung gegenüberliegenden Prallwandabschnitt und wird an diesem umgelenkt. Ein Teil des Luftstroms verlässt den Prallwandabschnitt am Mündungsrand des Einfädelschlitzes im wesentlichen in Richtung der Tangentialebene an den Prallwandab­schnitt bei diesem Mündungsrand. Diese Tangentialebene, und damit der Luftstrom und von diesem mitgeführte Filamente und Filamentbündel, gehen in den Einfädel­schlitz hinein und treffen auf dessen Begrenzungswand. In der erfindungsgemässen Verwirbelungsdüse ist das vermieden, die genannte Tangentialebene und der den einen Mündungsrand des Einfädelschlitzes verlassende Luftstrom treffen auf den der Einmündung der Luftzu­fuhrbohrung benachbarten zylindrischen Düsenwandab­ schnitt, während der andere Mündungsrand des Einfädel­schlitzes vom Inneren des Garnkanals aus gesehen aus­serhalb der genannten Tangentialebene (oder im Grenz­fall gerade noch in dieser Tangentialebene) liegt.In known intermingling nozzles, all wall sections of the yarn channel wall lie on a common cylindrical surface, usually a circular cylindrical surface, with the interruption through the threading slot. The air flow emerging from the air supply bore hits the baffle wall section opposite the air supply bore and is deflected there. Part of the air flow leaves the baffle section at the mouth edge of the threading slot essentially in the direction of the tangential plane to the baffle section at this mouth edge. This tangential plane, and thus the air flow and the filaments and filament bundles carried by it, go into the threading slot and meet its boundary wall. This is avoided in the swirling nozzle according to the invention, the said tangential plane and the air flow leaving the mouth of the threading slot hit the cylindrical nozzle wall adjacent to the mouth of the air supply bore cut, while the other mouth edge of the threading slot is seen from the inside of the yarn channel outside the above-mentioned tangential plane (or in the limit case just in this tangential plane).

Ausführungsbeispiele der Erfindung werden nach­stehend anhand der Zeichnungen näher erläutert. In diesen zeigen:

  • Fig. 1 einen Querschnitt durch eine Verwirbelungs­düse, gemäss Linie A - A in Fig. 2,
  • Fig. 2 eine Draufsicht zu Fig. 1,
  • Fig. 3 in grösserem Massstab eine Stirnansicht des Garnkanals einer erfindungsgemässen Verwirbelungs­düse,
  • Fig. 4 die gleiche Ansicht wie Fig. 3 mit schema­tisch angedeuteten Blasluftströmungen,
  • Fig. 5 eine schematische Skizze zur Erläuterung der Verhältnisse bei bekannten Verwirbelungsdüsen,
  • Fig. 6 in einer ähnlichen Ansicht wie Fig. 3 den Garnkanal in einer zweiten Ausführungsform der erfin­dungsgemässen Verwirbelungsdüse und
  • Fig. 7 wieder in einer ähnlichen Ansicht den Garnkanal in einer dritten Ausführungsform der erfin­dungsgemässen Verwirbelungsdüse.
Embodiments of the invention are explained below with reference to the drawings. In these show:
  • 1 shows a cross section through a swirling nozzle, according to line AA in FIG. 2,
  • 2 is a plan view of FIG. 1,
  • 3 shows, on a larger scale, an end view of the yarn channel of a swirling nozzle according to the invention,
  • 4 shows the same view as FIG. 3 with schematically indicated blowing air flows,
  • 5 shows a schematic sketch to explain the conditions in known swirling nozzles,
  • Fig. 6 in a view similar to Fig. 3, the yarn channel in a second embodiment of the intermingling nozzle according to the invention and
  • Fig. 7 again in a similar view of the yarn channel in a third embodiment of the intermingling nozzle according to the invention.

Die in den Fig. 1 und 2 dargestellte Verwirbe­lungsdüse besitzt einen Düsenkörper 1 und einen Prall­körper 2, die aufeinander befestigt sind. Die beiden Körper 1 und 2 könnten auch einstückig ausgebildet sein. Zwischen den beiden Körpern 1 und 2 ist ein durchgehender Garnkanal 3 ausgespart, in den ein Ein­fädelschlitz 4 und eine Luftzufuhrbohrung 5 seitlich einmünden. Durch den Garnkanal 3 wird ein laufendes Multifilamentgarn (nicht dargestellt) geführt, dessen Filamente im Garnkanal durch den aus der Luftzufuhr­bohrung 5 austretenden Blasluftstrom stellenweise miteinander verwirbelt werden.The swirling nozzle shown in FIGS. 1 and 2 has a nozzle body 1 and an impact body 2 which are fastened to one another. The two bodies 1 and 2 could also be formed in one piece. Between the two bodies 1 and 2, a continuous yarn channel 3 is recessed into which a threading slot 4 and an air supply bore 5 open laterally. A running multifilament yarn (not shown) is guided through the yarn channel 3, the filaments of which are swirled together in places in the yarn channel by the blown air stream emerging from the air supply bore 5.

Der Garnkanal 3.1 einer Ausführungsform der erfin­dungsgemässen Verwirbelungsdüse, mit dem Einfädel­schlitz 4 und der Luftzufuhrbohrung 5, ist in Fig. 3 in grösserem Massstab dargestellt. Die Wand des Garn­kanals 3.1 enthält einen kreiszylindrischen Prallwand­abschnitt 6.1, der sich, symmetrisch bezüglich der die Achse der Luftzufuhrbohrung 5 enthaltenden und zur Längsrichtung des Garnkanals 3.1 parallelen Ebene E, vom oberen Mündungsrand 7 des Einfädelschlitzes 4 bis zu einem diesem Mündungsrand 7 symmetrisch gegenüber­liegenden Endrand 8 erstreckt, und einen ebenfalls kreiszylindrischen Düsenwandabschnitt 9.1, der sich, wieder symmetrisch bezüglich der Ebene E, vom unteren Mündungsrand 10 des Einfädelschlitzes 4 bis zu einem dem Mündungsrand 10 symmetrisch gegenüberliegenden Endrand 11 erstreckt. Zwischen den Endrändern 8 und 11 liegt ein Uebergangswandabschnitt 12.1. Die Krümmungs­achse A6 des Prallwandabschnittes 6.1 und die Krüm­mungsachse A9 des Düsenwandabschnittes 9.1 verlaufen in einem Abstand voneinander parallel zueinander, und der Krümmungsradius R6 des Prallwandabschnittes 6.1 ist kleiner als der Krümmungsradius R9 des Düsenwand­abschnittes 9.1, und zwar derart, dass die im Mündungs­rand 7 an den Prallwandabschnitt 6.1 gelegte Tangen­tialebene T durch den Düsenwandabschnitt 9.1 geht. Der im Düsenwandabschnitt 9.1 liegende Mündungsrand 10 des Einfädelschlitzes 4 liegt also - vom Inneren des Garnkanals 3.1 aus gesehen - ausserhalb der Tangen­tialebene T. Daher tritt der Teil des aus der Luftzu­fuhrbohrung 5 austretenden Luftstroms, der vom Prall­wandabschnitt 6.1 wie in Fig. 4 schematisch angedeutet zum Mündungsrand 7 hin umgelenkt wird und der den Prallwandabschnitt 6.1 bei diesem Mündungsrand 7 etwa in Richtung der Tangentialebene T verlässt, nicht in den Einfädelschlitz 4 ein, sondern strömt zum Düsen­wandabschnitt 9.1, der den Luftstromteil weiter vom Einfädelschlitz 4 weg lenkt. Der Winkel β zwischen den dem Prallwandabschnitt 6.1 zugekehrten Seiten der Tan­gentialebene T und des Düsenwandabschnittes 9.1 ist zu diesem Zweck ein stumpfer Winkel.The yarn channel 3.1 of an embodiment of the intermingling nozzle according to the invention, with the threading slot 4 and the air supply bore 5, is shown on a larger scale in FIG. 3. The wall of the yarn channel 3.1 contains a circular cylindrical baffle section 6.1 which, symmetrical with respect to the plane E containing the axis of the air supply bore 5 and parallel to the longitudinal direction of the yarn channel 3.1, extends from the upper mouth edge 7 of the threading slot 4 to an end edge 8 symmetrically opposite this mouth edge 7 extends, and also a circular cylindrical nozzle wall section 9.1, which, again symmetrically with respect to the plane E, extends from the lower mouth edge 10 of the threading slot 4 to an end edge 11 symmetrically opposite the mouth edge 10. Between the end edges 8 and 11 is a transition wall section 12.1. The axis of curvature A6 of the baffle section 6.1 and the axis of curvature A9 of the nozzle wall section 9.1 run parallel to one another at a distance from one another, and the radius of curvature R6 of the baffle section 6.1 is smaller than the radius of curvature R9 of the nozzle wall section 9.1, in such a way that those in the mouth edge 7 on the baffle section 6.1 placed tangential plane T goes through the nozzle wall section 9.1. The mouth edge 10 of the threading slot 4 located in the nozzle wall section 9.1 is therefore - seen from the inside of the yarn channel 3.1 - outside the tangential plane T. Therefore, the part of the air flow emerging from the air supply bore 5 occurs, which is indicated schematically by the baffle wall section 6.1 as shown in FIG. 4 Mouth edge 7 is deflected out and which leaves the baffle section 6.1 at this mouth edge 7 approximately in the direction of the tangential plane T, does not enter the threading slot 4, but flows to the nozzle wall section 9.1, which further the air flow part from Threading slot 4 steers away. For this purpose, the angle β between the sides of the tangential plane T and the nozzle wall section 9.1 facing the baffle section 6.1 is an obtuse angle.

Die Fig. 5 zeigt demgegenüber schematisch die Verhältnisse in einer bekannten Verwirbelungsdüse mit einem Prallwandabschnitt 6.2 und einem Düsenwandab­schnitt 9.2, die auf einer gemeinsamen Kreiszylinder­fläche liegen. Die im Mündungsrand 7 an den Prallwand­abschnitt 6.2 gelegte Tangentialebene T geht durch die untere Begrenzungswand 14 des Einfädelschlitzes 4. Der Teilluftstrom, der den Prallwandabschnitt 6.2 beim Mündungsrand 7 in Richtung der Tangentialebene T ver­lässt, ist daher auf den unteren Mündungsrand 10 des Einfädelschlitzes 4 gerichtet und wird von diesem teilweise in den Einfädelschlitz 4 gelenkt.In contrast, FIG. 5 shows schematically the conditions in a known swirling nozzle with a baffle wall section 6.2 and a nozzle wall section 9.2, which lie on a common circular cylinder surface. The tangential plane T placed in the mouth edge 7 on the baffle section 6.2 passes through the lower boundary wall 14 of the threading slot 4. The partial air flow which leaves the baffle section 6.2 at the mouth edge 7 in the direction of the tangential plane T is therefore directed towards the lower mouth edge 10 of the threading slot 4 and is partially guided by this into the threading slot 4.

Die anhand der Fig. 3 beschriebene Symmetrie des Garnkanals bezüglich der Ebene E in bevorzugten Ausfüh­rungsformen der erfindungsgemässen Verwirbelungsdüse bringt mit sich, dass die im Endrand 8 an den Prall­wandabschnitt 6.1 gelegte Tangentialebene T.1 mit der Symmetrieebene E und mit dem Düsenwandabschnitt 9.1 gleiche Winkel bildet wie die Tangentialebene T. Daher wird die in Fig. 4 schematisch dargestellte Luftströ­mung im Garnkanal 3.1 ebenfalls im wesentlichen sym­metrisch bezüglich der Ebene E. Mit der symmetrischen Luftströmung wird einer Tendenz zur seitlichen Ver­lagerung des zu verwirbelnden Multifilamentgarns, etwa zum Einfädelschlitz 4 hin, entgegengewirkt. Um die Symmetrie der Luftströmung nicht zu stören, sollte sich der Uebergangswandabschnitt 12.1 nicht in die Luftströmung erstrecken, das heisst, er sollte - vom Inneren des Garnkanals 3.1 aus gesehen - ausserhalb der Tangentialebene T.1 liegen.The symmetry of the yarn channel described with reference to FIG. 3 with respect to the plane E in preferred embodiments of the intermingling nozzle according to the invention entails that the tangential plane T.1 placed in the end edge 8 on the baffle wall section 6.1 forms the same angle with the plane of symmetry E and with the nozzle wall section 9.1 like the tangential plane T. Therefore, the air flow shown schematically in FIG. 4 in the yarn channel 3.1 is also essentially symmetrical with respect to the plane E. The symmetrical air flow counteracts a tendency for the multifilament yarn to be intermingled to move laterally, for example towards the threading slot 4. In order not to disturb the symmetry of the air flow, the transition wall section 12.1 should not extend into the air flow, that is to say it should lie outside the tangential plane T.1, viewed from the inside of the yarn channel 3.1.

Eine gewisse Störung der Symmetrie der Luftströ­mung im Garnkanal kann sich dadurch ergeben, dass Luft aus dem Garnkanal durch den Einfädelschlitz 4 austritt, insbesondere im Bereich der Enden des Garnkanals. Dieser Störung wird mit der Ausführungsform gemäss Fig. 6 entgegengewirkt.A certain disturbance in the symmetry of the air flow in the yarn duct can result from the fact that air emerges from the yarn channel through the threading slot 4, in particular in the region of the ends of the yarn channel. This disturbance is counteracted with the embodiment according to FIG. 6.

In Fig. 6 sind gleiche Teile mit den gleichen Hinweisziffern wie in Fig. 3 bezeichnet. Der Garn­kanal 3.1 hat die gleiche Form wie in Fig. 3, mit dem Prallwandabschnitt 6.1 und dem Düsenwandabschnitt 9.1. Jedoch ist der in Fig. 3 gezeigte Uebergangswandab­schnitt 12.1 in Fig. 6 durch die Mündung eines zum Einfädelschlitz 4 bezüglich der Ebene E im wesentli­chen symmetrischen Schlitzes 15 ersetzt, der von einem Entlastungskanal 16 ausgeht. Der Entlastungskanal 16, der sich parallel zum Garnkanal 3.1 über die ganze Länge der Verwirbelungsdüse erstreckt, steht mit der Umgebung in Verbindung, so dass im Schlitz 15 und bei dessen Mündung die gleichen Strömungsbedingungen herrschen wie beim Einfädelschlitz 4.In FIG. 6, the same parts are designated with the same reference numbers as in FIG. 3. The yarn channel 3.1 has the same shape as in Fig. 3, with the baffle section 6.1 and the nozzle wall section 9.1. However, the transition wall section 12.1 shown in FIG. 3 in FIG. 6 is replaced by the opening of a slot 15 which is essentially symmetrical with respect to the plane E and is in relation to the plane E and which starts from a relief channel 16. The relief channel 16, which extends parallel to the yarn channel 3.1 over the entire length of the intermingling nozzle, communicates with the surroundings, so that the same flow conditions as in the threading slot 4 prevail in the slot 15 and at the mouth thereof.

Der Einfädelschlitz 4 besitzt Begrenzungswände 13.1 und 14.1, welche vorzugsweise etwa rechtwinklig zur Ebene E verlaufen.The threading slot 4 has boundary walls 13.1 and 14.1, which are preferably approximately at right angles to the plane E.

In den Fig. 3 und 6 sind der Prallwandabschnitt 6.1 und der Düsenwandabschnitt 9.1 je etwa kreiszylin­drisch. Das ist jedoch nicht zwingend, die Wandab­schnitte könnten auch andere kontinuierlich gerundete zylindrische Formen haben, z.B. im Querschnitt oval oder etwa elliptisch.3 and 6, the baffle section 6.1 and the nozzle wall section 9.1 are each approximately circular cylindrical. However, this is not mandatory, the wall sections could also have other continuously rounded cylindrical shapes, e.g. oval or roughly elliptical in cross-section.

Fig. 7 zeigt den Garnkanal 3.3 einer dritten Aus­führungsform der erfindungsgemässen Verwirbelungsdüse. In den Garnkanal 3.3 münden seitlich der Einfädel­schlitz 4 und die Luftzufuhrbohrung 5. Die Wand des Garnkanals 3.3 enthält einen kreiszylindrischen Prall­wandabschnitt 6.3, der sich, auch hier symmetrisch bezüglich der Ebene E, vom oberen Mündungsrand 7 des Einfädelschlitzes 4 bis zu dem diesem Mündungsrand 7 symmetrisch gegenüberliegenden Endrand 8 erstreckt, und einen zylindrischen, im Querschnitt etwa ellipsen­bogenförmigen Düsenwandabschnitt 9.3, der sich vom unteren Mündungsrand 10 des Einfädelschlitzes 4 bis zu dem Endrand 11 erstreckt, welcher dem Mündungsrand 10 symmetrisch bezüglich der Ebene E gegenüberliegt. Zwischen den Endrändern 8 und 11 liegt ein Uebergangs­wandabschnitt 12.3, der in dieser Ausführungsform z.B. eben sein kann. Die im Mündungsrand 7 an den Prall­wandabschnitt 6.3 gelegte Tangentialebene T verläuft auch hier nicht in den Einfädelschlitz 4 hinein, sondern geht durch dessen Mündungsrand 10 und damit durch den Düsenwandabschnitt 9.3, der von diesem Mün­dungsrand ausgeht.7 shows the yarn channel 3.3 of a third embodiment of the intermingling nozzle according to the invention. The threading slot 4 and the air supply bore 5 open laterally into the thread channel 3.3. The wall of the thread channel 3.3 contains a circular-cylindrical baffle wall section 6.3 which, also here symmetrically with respect to the plane E, is symmetrical from the upper mouth edge 7 of the threading slot 4 to this mouth edge 7 opposite end edge 8 extends, and a cylindrical, approximately elliptical arc-shaped nozzle wall section 9.3, which extends from the lower mouth edge 10 of the threading slot 4 to the end edge 11, which is opposite the mouth edge 10 symmetrically with respect to the plane E. Between the end edges 8 and 11 is a transition wall section 12.3, which in this embodiment can be flat, for example. The tangential plane T placed in the mouth edge 7 on the baffle section 6.3 also does not run into the threading slot 4 here, but goes through its mouth edge 10 and thus through the nozzle wall section 9.3, which starts from this mouth edge.

Dadurch, dass in den erfindungsgemässen Verwirbe­lungsdüsen der Prallwandabschnitt und der Düsenwand­abschnitt des Garnkanals nicht auf einer gemeinsamen Kreiszylinderfläche liegen, sondern je eine eigene zylindrische Form haben, ergibt sich auch die vorteil­hafte Möglichkeit, das Verhältnis zwischen der Breite des Garnkanals (gemessen senkrecht zur Symmetrieebene E) zur Höhe des Garnkanals (gemessen senkrecht zur Breite, d.h. in der Ebene E) zu variieren. In bevor­zugten Ausführungsformen ist die Breite des Garn­kanals grösser als seine Höhe.The fact that in the intermingling nozzles according to the invention the baffle section and the nozzle wall section of the yarn channel do not lie on a common circular cylindrical surface, but each have their own cylindrical shape, also gives the advantageous possibility of determining the ratio between the width of the yarn channel (measured perpendicular to the plane of symmetry E) to vary the height of the yarn channel (measured perpendicular to the width, ie in plane E). In preferred embodiments, the width of the yarn channel is greater than its height.

Die erfindungsgemässen Verwirbelungsdüsen können vorteilhaft an Spinnmaschinen eingesetzt werden, und zwar insbesondere zum Verwirbeln von vororientierten Multifilamentgarnen (POY), aber auch von fertigorien­tierten (FOY) und von vollverstreckten (FDY) Multi­filamentgarnen.The intermingling nozzles according to the invention can advantageously be used on spinning machines, in particular for intermingling pre-oriented multifilament yarns (POY), but also of ready-oriented (FOY) and fully drawn (FDY) multifilament yarns.

Claims (9)

1. Verwirbelungsdüse zum Verwirbeln von Multifila­mentgarnen, mit einem durchgehenden Garnkanal (3.1; 3.3), in welchen wenigstens eine Luftzufuhrbohrung (5) und ein Einfädelschlitz (4) seitlich einmünden, dadurch gekennzeichnet, dass die Wand des Garnkanals (3.1; 3.3) zwei zylindrische Wandabschnitte aufweist, nämlich einen der Einmündung der Luftzufuhrbohrung (5) gegen­überliegenden Prallwandabschnitt (6.1; 6.3) und einen der Einmündung der Luftzufuhrbohrung (5) benachbarten Düsenwandabschnitt (9.1; 9.3), wobei der Einfädel­schlitz (4) zwischen dem Prallwandabschnitt und dem Düsenwandabschnitt in den Garnkanal (3.1; 3.3) mündet, und dass die den im Prallwandabschnitt (6.1; 6.3) liegenden Mündungsrand (7) des Einfädelschlitzes (4) enthaltende Tangentialebene (T) an den Prallwandab­schnitt (6.1; 6.3) durch den Düsenwandabschnitt (9.1; 9.3) geht.1. intermingling nozzle for intermingling multifilament yarns, with a continuous yarn channel (3.1; 3.3), in which at least one air supply bore (5) and a threading slot (4) open out laterally, characterized in that the wall of the yarn channel (3.1; 3.3) has two cylindrical ones Has wall sections, namely a baffle wall section (6.1; 6.3) opposite the mouth of the air supply bore (5) and a nozzle wall section (9.1; 9.3) adjacent to the mouth of the air supply bore (5), the threading slot (4) between the baffle wall section and the nozzle wall section in the Yarn channel (3.1; 3.3) opens, and that the tangential plane (T) containing the mouth edge (7) of the threading slot (4) lying in the baffle section (6.1; 6.3) to the baffle section (6.1; 6.3) through the nozzle wall section (9.1; 9.3) goes. 2. Verwirbelungsdüse nach Anspruch 1, dadurch gekennzeichnet, dass der den Prallwandabschnitt (6.1; 6.3) einschliessende Winkel (β) zwischen der genannten Tangentialebene (T) und dem Düsenwandabschnitt (9.1; 9.3) ein stumpfer Winkel ist.2. Swirling nozzle according to claim 1, characterized in that the angle (β) enclosing the baffle section (6.1; 6.3) between said tangential plane (T) and the nozzle wall section (9.1; 9.3) is an obtuse angle. 3. Verwirbelungsdüse nach Anspruch 1 oder 2, da­durch gekennzeichnet, dass der Prallwandabschnitt (6.1; 6.3) und der Düsenwandabschnitt (9.1; 9.3) je symmetrisch sind bezüglich einer die Achse der Luft­zufuhrbohrung (5) enthaltenden, zur Längsrichtung des Garnkanals (3.1; 3.3) parallelen Ebene (E).3. intermingling nozzle according to claim 1 or 2, characterized in that the baffle section (6.1; 6.3) and the nozzle wall section (9.1; 9.3) are each symmetrical with respect to an axis of the air supply bore (5) containing the longitudinal direction of the yarn channel (3.1; 3.3 ) parallel plane (E). 4. Verwirbelungsdüse nach Anspruch 3, dadurch gekennzeichnet, dass zwischen den zu den Mündungs­rändern (7, 10) des Einfädelschlitzes (4) symmetri­schen Endrändern (8, 11) des Prallwandabschnittes (6.1; 6.3) und des Düsenwandabschnittes (9.1; 9.3) ein Uebergangswandabschnitt (12.1; 12.3) liegt, der vom Garnkanal (3.1; 3.3) aus gesehen ausserhalb der den Endrand (8) des Prallwandabschnittes (6.1; 6.3) enthaltenden Tangentialebene (T.1) an den Prallwand­abschnitt liegt.4. swirling nozzle according to claim 3, characterized in that between the mouth edges (7, 10) of the threading slot (4) symmetrical end edges (8, 11) of the baffle section (6.1; 6.3) and the nozzle wall section (9.1; 9.3) there is a transition wall section (12.1; 12.3) which, seen from the yarn channel (3.1; 3.3), lies outside the tangential plane (T.1) containing the end edge (8) of the baffle wall section (6.1; 6.3) on the baffle wall section. 5. Verwirbelungsdüse nach Anspruch 3, dadurch gekennzeichnet, dass zwischen den zu den Mündungs­rändern (7, 10) des Einfädelschlitzes (4) symmetri­schen Endrändern (8, 11) des Prallwandabschnittes (6.1) und des Düsenwandabschnittes (9.1) ein zweiter, von einem Entlastungskanal (16) ausgehender Schlitz (15) in den Garnkanal (3.1) mündet.5. swirling nozzle according to claim 3, characterized in that between the mouth edges (7, 10) of the threading slot (4) symmetrical end edges (8, 11) of the baffle section (6.1) and the nozzle wall section (9.1) a second, of a relief channel (16) outgoing slot (15) opens into the yarn channel (3.1). 6. Verwirbelungsdüse nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Einfädelschlitz (4) Begrenzungswände (13.1, 14.1) aufweist, die zu einer die Achse der Luftzufuhrbohrung (5) enthaltenden, zur Längsrichtung des Garnkanals (3.1; 3.3) parallelen Ebene (E) etwa senkrecht stehen.6. interlacing nozzle according to one of claims 1 to 5, characterized in that the threading slot (4) has boundary walls (13.1, 14.1) which parallel to a the axis of the air supply bore (5) containing, to the longitudinal direction of the yarn channel (3.1; 3.3) Level (E) is approximately vertical. 7. Verwirbelungsdüse nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der Prallwandab­schnitt (6.1; 6.3) im Querschnitt etwa kreisbogenför­mig ist.7. Swirling nozzle according to one of claims 1 to 6, characterized in that the baffle section (6.1; 6.3) is approximately circular in cross-section. 8. Verwirbelungsdüse nach Anspruch 7, dadurch gekennzeichnet, dass der Düsenwandabschnitt (9.1) im Querschnitt ebenfalls etwa kreisbogenförmig ist, wobei die Krümmungsachsen (A6, A9) des Prallwandab­schnittes (6.1) und des Düsenwandabschnittes (9.1) im Abstand voneinander parallel zueinander verlaufen und/oder der Prallwandabschnitt (6.1) einen kleineren Krümmungsradius (R6) hat als der Düsenwandabschnitt (9.1).8. swirling nozzle according to claim 7, characterized in that the nozzle wall section (9.1) is also approximately circular in cross-section, the axes of curvature (A6, A9) of the baffle wall section (6.1) and the nozzle wall section (9.1) at a distance from one another parallel and / or the baffle section (6.1) has a smaller radius of curvature (R6) than the nozzle wall section (9.1). 9. Verwirbelungsdüse nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der Düsenwandab­schnitt (9.3) im Querschnitt etwa ellipsenbogenförmig ist.9. swirling nozzle according to one of claims 1 to 7, characterized in that the nozzle wall section (9.3) is approximately elliptical in cross-section.
EP90810076A 1989-02-15 1990-02-05 Interlacing jet for interlacing multifilament yarns Expired - Lifetime EP0383722B1 (en)

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CH530/89 1989-02-15
CH530/89A CH676559A5 (en) 1989-02-15 1989-02-15

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KR900012684A (en) 1990-09-01
JPH02234938A (en) 1990-09-18
US5010631A (en) 1991-04-30
DE59002133D1 (en) 1993-09-09
EP0383722B1 (en) 1993-08-04
EP0383722A3 (en) 1990-12-05
CH676559A5 (en) 1991-02-15

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