EP1340846B1 - Method for interlacing non- or partially-interlaced weft yarn, particularly synthetic filament weft yarn, and weaving loom for carrying out this method - Google Patents

Method for interlacing non- or partially-interlaced weft yarn, particularly synthetic filament weft yarn, and weaving loom for carrying out this method Download PDF

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Publication number
EP1340846B1
EP1340846B1 EP03003373A EP03003373A EP1340846B1 EP 1340846 B1 EP1340846 B1 EP 1340846B1 EP 03003373 A EP03003373 A EP 03003373A EP 03003373 A EP03003373 A EP 03003373A EP 1340846 B1 EP1340846 B1 EP 1340846B1
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EP
European Patent Office
Prior art keywords
weft yarn
weft
yarn
bar
nozzle pipe
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
Application number
EP03003373A
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German (de)
French (fr)
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EP1340846A3 (en
EP1340846A2 (en
Inventor
Adnan Dr. Wahhoud
Matthias Armbrust
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Lindauer Dornier GmbH
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Lindauer Dornier GmbH
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Publication of EP1340846A2 publication Critical patent/EP1340846A2/en
Publication of EP1340846A3 publication Critical patent/EP1340846A3/en
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Publication of EP1340846B1 publication Critical patent/EP1340846B1/en
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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D03D47/3026—Air supply systems
    • D03D47/3053—Arrangements or lay out of air supply systems
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D03D47/3006—Construction of the nozzles
    • D03D47/3013—Main nozzles
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D03D47/3026—Air supply systems

Definitions

  • the invention relates to a method for ironing weft yarns that have not or only partially been woven, in particular synthetic filament weft yarns, on weaving machines with pneumatically operated weft insertion means according to the features of the preamble of patent claim 1.
  • the invention further relates to a weaving machine according to the features of the preamble of claim 6.
  • a loom with pneumatically acting weft insertion means is known from JP 3-161557.
  • the weft insertion means consisting of the nozzle body and the nozzle tube is used to insert a weft yarn into the shed.
  • a first and a second air stream supplied to the yarn guide channel of the nozzle body are applied tangentially to the weft yarn to improve the yarn closure.
  • a weft insertion means is assigned to each weft yarn.
  • the remaining yarns are held under tension by an air flow (so-called holding air) predetermined pressure levels, in cooperation with a so-called pre-winder with a thread stopper, in the relevant weft insertion means.
  • holding air air flow
  • the yarn connection previously imparted to the yarn is partially canceled again.
  • the air flow causing the weft insertion during the insertion process cannot transmit the required thread tension to the weft, which has a negative effect on the weft insertion.
  • DE 196 53 028 C1 discloses a method for processing weft yarns which are not or only partially intermingled, in particular synthetic filament weft yarns, on weaving machines with pneumatic weft insertion.
  • the known object is based on the task, in particular filament weft yarns, which have only a slight inner thread, to make them processable on air jet weaving machines.
  • the object is achieved in that the weft yarn is swirled after being pulled off the supply reel and before being temporarily stored on a prewinding device by means of a swirling device known per se.
  • the previously known method and the previously known air jet weaving machine for carrying out the method do not take into account that a weft yarn treated according to the method is exposed to an air flow acting in the direction of the weft insertion until it enters the loom inside the nozzle tube of the pneumatic weft insertion means in order to sort the weft yarn into " Start position "for the weft entry.
  • the inner thread closure of the filament weft is regularly loosened to a certain length. If such a length of the weft yarn is woven in, filament loops are formed in the fabric, on the so-called catch side of the yarn, which impair the quality of the fabric.
  • the object of the invention is to avoid filament loops in the fabric due to a loosened yarn connection.
  • An essential feature according to claim 1 is that, in a known manner, a longitudinal section of a weft yarn held in a nozzle tube of a pneumatically operated weft insertion means at least for the period of time between a first and a second weaving cycle with a tensile force exerted on the weft yarn and at a first predetermined pressure level is acted upon by the first air flow and that, according to the invention, the end region of the length section is additionally acted upon within the aforementioned period of time by a second air flow which is at a second predetermined pressure level P2 and whose flow direction is different from the flow direction of the first air flow.
  • the duration of the additional loading is greater than the duration of a weaving cycle. This is the case if, for example, more than two different weft yarns are woven in succession because more than two weft insertion means of a weft insertion system are then used.
  • the first air flow causing the pulling force on the weft yarn is based e.g. depending on the quality of the yarn at a relatively low pressure level, which can be less than 1 bar, while the second air flow serving the thongs, directed towards the weft yarn in the nozzle tube, is based on a relatively high pressure level, which is preferably between 4 bar and over 1 bar and is 6 bar.
  • the weft yarn held in the nozzle tube is additionally acted upon by the second air stream in the nozzle tube of the weft insertion means, and specifically before its free end.
  • the weft yarn is danced in such a way that there is a sufficiently good yarn closure.
  • the ironing process takes place in the region of the free end of the length section, so that the unraveled yarn end is part of the yarn waste.
  • the yarn can e.g. be in the form of a ribbon and have several ribbons.
  • a weaving machine which has at least one pneumatically operated weft insertion means consisting of a nozzle and a nozzle tube.
  • the interior of the nozzle tube is connected to a controllable valve in the region of the free end via at least one opening in the tube wall and via a pressure line.
  • the pressure line can be operatively connected to a separate, controllable valve.
  • each weft yarn 1; 2 is fed to a weft insertion means, consisting of a main nozzle 3; 4 with nozzle tube 3a; 4a, from a pre-winding device, not shown.
  • a first main nozzle 3 and a second main nozzle 4 are connected to a pressure line 10 connected to a valve 8.
  • the relevant length section of the weft yarn 1 is held in the nozzle tube 3a, in which a tensile force with a predetermined time period or during a predetermined rotation angle range of the main shaft of the main shaft of the weft yarn 1 is by means of an air flow at a pressure level P1 Loom is exercised.
  • the other weft yarn 2 is subject to the weft insertion.
  • the end region of the length section is additionally acted upon by an air stream which is at a pressure level P2 via an opening 3b provided in the free end region of the nozzle tube 3a in order to effect a thread closure.
  • the yarn closure achieved in the region of the free yarn end advantageously prevents the weft yarn 1 or 2 from being unraveled when the weft is inserted.
  • the nozzle tubes 3a; 4a are in one with two parallel ones Pressure channels 5a; 5b equipped connecting piece 5, namely in such a way that the second air flow under pressure level P2 is acted upon via the pressure channel 5a or 5b and the opening 3b or 4b, the yarn 1 or 2 and alternately a yarn closure in the nozzle tube 3a and 4a realized.
  • a pressure line 7 is connected via suitable means 6, which is connected via a valve 9 to a pressure source (not shown) which generates the pressure level P2 of the second air stream.

Abstract

Intermingled filament yarns (1, 2) are inserted as weft alternately by jet tubes (3a, 4a) that are supplied with compressed air at pressure (P1.1, P1.2) of less than 1 bar. At a section (A-A) some distance from the exit the yarn is exposed to an intermingling jet directed at an angle to the forwarding airflow and supplied with air at a pressure greater than 1 bar, preferably 4 to 6 bar. An Independent claim is also included for an air jet loom equipped accordingly, having control valves timed to provide intermingling air pulses in time with the weft insertion cycle. The intermingled end of the weft is eventually cut off with the waste yarn.

Description

Die Erfindung betrifft ein Verfahren zum Taengeln von nicht oder teilweise getaengelten Schussgarnen, insbesondere synthetischen Filament-Schussgarnen, auf Webmaschinen mit pneumatisch betriebenen Schussfadeneintragsmitteln nach den Merkmalen des Oberbegriffs von Patentanspruch 1.The invention relates to a method for ironing weft yarns that have not or only partially been woven, in particular synthetic filament weft yarns, on weaving machines with pneumatically operated weft insertion means according to the features of the preamble of patent claim 1.

Die Erfindung betrifft ferner eine Webmaschine nach den Merkmalen des Oberbegriffs von Patentanspruch 6.The invention further relates to a weaving machine according to the features of the preamble of claim 6.

Eine Webmaschine mit pneumatisch wirkenden Schussfadeneintragsmitteln ist aus JP 3-161557 bekannt. Das aus Düsenkörper und Düsenrohr bestehende Schussfadeneintragsmittel dient dem Eintragen eines Schussgarnes in das Webfach.
Vor dem Austritt des Schussgarnes aus dem Düsenrohr wird zur Verbesserung des Garnschlusses mit einem ersten und einem zweiten zum Garnführungskanal des Düsenkörpers zugeführten Luftstrom das Schussgarn tangential beaufschlagt.
Beim Verweben von Filament-Schussgarnen unterschiedlicher Qualität ist jedem Schussgarn ein Schussfadeneintragsmittel zugeordnet. Außer dem betreffenden Garn, das in das Webfach eingetragen wird, werden die übrigen Garne von einer Luftströmung (sogenannte Halteluft) vorbestimmten Druckniveaus, im Zusammenwirken mit einem sogenannten Vorspuler mit Fadenstopper, in dem betreffenden Schussfadeneintragsmittel unter Zugspannung gehalten.
Mit dem die Zugkraft auf das Garn ausübenden Luftstrom (Halteluft) wird aber in nachteiliger Weise der zuvor dem Garn verliehene Garnschluss teilweise wieder aufgehoben. Damit kann die den Schussfadeneintrag bewirkende Luftströmung beim Eintragsprozess nicht die erforderliche Fadenzugkraft auf den Schussfaden übertragen, was sich negativ auf den Schusseintrag auswirkt.A loom with pneumatically acting weft insertion means is known from JP 3-161557. The weft insertion means consisting of the nozzle body and the nozzle tube is used to insert a weft yarn into the shed.
Before the weft yarn emerges from the nozzle tube, a first and a second air stream supplied to the yarn guide channel of the nozzle body are applied tangentially to the weft yarn to improve the yarn closure.
When weaving filament weft yarns of different quality, a weft insertion means is assigned to each weft yarn. In addition to the yarn in question, which is entered into the shed, the remaining yarns are held under tension by an air flow (so-called holding air) predetermined pressure levels, in cooperation with a so-called pre-winder with a thread stopper, in the relevant weft insertion means.
However, with the air flow (holding air) exerting the tensile force on the yarn, the yarn connection previously imparted to the yarn is partially canceled again. As a result, the air flow causing the weft insertion during the insertion process cannot transmit the required thread tension to the weft, which has a negative effect on the weft insertion.

Ferner ist aus DE 196 53 028 C1 ein Verfahren zum Verarbeiten von nicht oder teilweise verwirbelten Schussgarnen, insbesondere synthetischen Filament-Schussgarnen, auf Webmaschinen mit pneumatischem Schusseintrag bekannt.
Dem bekannten Gegenstand liegt die Aufgabe zugrunde, insbesondere Filament-Schussgarne, die nur einen geringen inneren Garnschluss besitzen, auf Luftdüsenwebmaschinen verarbeitbar zu machen.Furthermore, DE 196 53 028 C1 discloses a method for processing weft yarns which are not or only partially intermingled, in particular synthetic filament weft yarns, on weaving machines with pneumatic weft insertion.
The known object is based on the task, in particular filament weft yarns, which have only a slight inner thread, to make them processable on air jet weaving machines.

Die Aufgabe wird dadurch gelöst, dass das Schussgarn nach dem Abziehen von der Vorratsspule und vor dem Zwischenspeichern auf einem Vorspulgerät mittels einer an sich bekannten Verwirbelungseinrichtung verwirbelt wird.
Das vorbekannte Verfahren und die vorbekannte Luftdüsenwebmaschine zur Durchführung des Verfahrens berücksichtigt nicht, dass ein nach dem Verfahren behandeltes Schussgarn bis zu dessen Eintrag in das Webfach innerhalb des Düsenrohres des pneumatischen Schusseintragmittels einer in Richtung des Schusseintrags wirkenden Luftströmung ausgesetzt ist, um das Schussgarn gewissermaßen in "Startposition" für den Schusseintrag zu halten. Dabei wird regelmäßig der innere Garnschluss des Filament-Schussgarns auf einer bestimmten Länge aufgelöst. Wird eine derartige Länge des Schussgarnes eingewoben, entstehen im Gewebe, auf der sogenannten Fangseite des Garnes, Filamentschlingen, die die Qualität des Gewebes beeinträchtigen.The object is achieved in that the weft yarn is swirled after being pulled off the supply reel and before being temporarily stored on a prewinding device by means of a swirling device known per se.
The previously known method and the previously known air jet weaving machine for carrying out the method do not take into account that a weft yarn treated according to the method is exposed to an air flow acting in the direction of the weft insertion until it enters the loom inside the nozzle tube of the pneumatic weft insertion means in order to sort the weft yarn into " Start position "for the weft entry. The inner thread closure of the filament weft is regularly loosened to a certain length. If such a length of the weft yarn is woven in, filament loops are formed in the fabric, on the so-called catch side of the yarn, which impair the quality of the fabric.

Aufgabe der Erfindung ist es, Filamentschlingen im Gewebe aufgrund eines aufgelösten Garnschlusses zu vermeiden.The object of the invention is to avoid filament loops in the fabric due to a loosened yarn connection.

Die Aufgabe wird erfindungsgemäß durch die Merkmale der Patentansprüche 1 und 6 gelöst.The object is achieved by the features of claims 1 and 6.

Wesentliches Merkmal nach Patentanspruch 1 ist, dass in bekannter Weise ein Längenabschnitt eines in einem Düsenrohr eines pneumatisch betriebenen Schussfadeneintragmittels gehaltenen Schussgarns wenigstens für die zwischen einem ersten und einem zweiten Webzyklus liegende Zeitdauer mit einem eine Zugkraft auf das Schussgarn ausübenden und unter einem ersten vorbestimmten Druckniveau stehenden ersten Luftstrom beaufschlagt wird und dass erfindungsgemäß der Endbereich des Längenabschnitts innerhalb der vorgenannten Zeitdauer zusätzlich mit einem unter einem zweiten vorbestimmten Druckniveau P2 stehenden zweiten Luftstrom beaufschlagt wird, dessen Strömungsrichtung verschieden zur Strömungsrichtung des ersten Luftstromes ist.An essential feature according to claim 1 is that, in a known manner, a longitudinal section of a weft yarn held in a nozzle tube of a pneumatically operated weft insertion means at least for the period of time between a first and a second weaving cycle with a tensile force exerted on the weft yarn and at a first predetermined pressure level is acted upon by the first air flow and that, according to the invention, the end region of the length section is additionally acted upon within the aforementioned period of time by a second air flow which is at a second predetermined pressure level P2 and whose flow direction is different from the flow direction of the first air flow.

In weiterer Ausgestaltung des erfindungsgemäßen Verfahrens kann die Zeitdauer der zusätzlichen Beaufschlagung größer als die Zeitdauer eines Webzyklus sein. Das ist dann der Fall, wenn z.B. mehr als zwei verschiedene Schussgarne nacheinander verwoben werden, weil dann auch mehr als zwei Schussfadeneintragsmittel eines Schussfadeneintragsystems verwendet werden.In a further embodiment of the method according to the invention, the duration of the additional loading is greater than the duration of a weaving cycle. This is the case if, for example, more than two different weft yarns are woven in succession because more than two weft insertion means of a weft insertion system are then used.

Der die Zugkraft auf das Schussgarn bewirkende erste Luftstrom basiert z.B. in Abhängigkeit von der Garnqualität auf einem relativ niedrigem Druckniveau, das bei weniger als 1 bar liegen kann, während der den Taengeln dienende, auf das Schussgarn im Düsenrohr gerichtete zweite Luftstrom auf einem relativ hohem Druckniveau basiert, das bei über 1 bar vorzugsweise zwischen 4 bar und 6 bar liegt.The first air flow causing the pulling force on the weft yarn is based e.g. depending on the quality of the yarn at a relatively low pressure level, which can be less than 1 bar, while the second air flow serving the thongs, directed towards the weft yarn in the nozzle tube, is based on a relatively high pressure level, which is preferably between 4 bar and over 1 bar and is 6 bar.

Die zusätzliche Beaufschlagung des in dem Düsenrohr gehaltenen Schussgarnes mit dem zweiten Luftstrom erfolgt erfindungsgemäß im Düsenrohr des Schussfadeneintragmittels, und zwar vor dessen freiem Ende. Dabei wird das Schussgarn derart getaengelt, dass ein hinreichend guter Garnschluss entsteht.According to the invention, the weft yarn held in the nozzle tube is additionally acted upon by the second air stream in the nozzle tube of the weft insertion means, and specifically before its free end. The weft yarn is danced in such a way that there is a sufficiently good yarn closure.

Ein hinreichend guter Garnschluss wird dann erreicht, wenn die zusätzliche Beaufschlagung innerhalb der vorgenannten Zeitdauer gepulst erfolgt.Sufficiently good thread closure is achieved if the additional application is pulsed within the aforementioned period.

Um zu vermeiden, dass das nach dem erzeugten Garnschluss, in Schussrichtung gesehen, liegende aufgedröselte Ende des Schussgarns in das Gewebe eingewoben wird, erfolgt erfindungsgemäß der Taengelprozess im Bereich des freien Endes des Längenabschnittes, so dass das aufgedröselte Garnende Bestandteil des Garnabfalles ist.In order to avoid that the unraveled end of the weft yarn lying after the generated yarn closure, seen in the weft direction, is woven into the fabric, according to the invention the ironing process takes place in the region of the free end of the length section, so that the unraveled yarn end is part of the yarn waste.

In weiterer Ausgestaltung der Erfindung kann das Garn z.B. bändchenförmigen Charakters sein und mehrere Bändchen aufweisen.In a further embodiment of the invention, the yarn can e.g. be in the form of a ribbon and have several ribbons.

Zur Durchführung des Verfahrens ist eine Webmaschine vorgesehen, die wenigstens ein aus Düse und Düsenrohr bestehendes, pneumatisch betriebenes Schussfadeneintragsmittel besitzt.To carry out the method, a weaving machine is provided which has at least one pneumatically operated weft insertion means consisting of a nozzle and a nozzle tube.

Gemäß der Erfindung ist dabei der Innenraum des Düsenrohres im Bereich des freien Endes über wenigstens eine in der Rohrwandung vorhandene Öffnung und über eine Druckleitung mit einem steuerbaren Ventil verbunden.According to the invention, the interior of the nozzle tube is connected to a controllable valve in the region of the free end via at least one opening in the tube wall and via a pressure line.

In einer anderen Ausführung kann die Druckleitung mit einem separaten, steuerbaren Ventil wirkverbunden sein.In another embodiment, the pressure line can be operatively connected to a separate, controllable valve.

Die Erfindung wird nachstehend an einem Ausführungsbeispiel erläutert:The invention is explained below using an exemplary embodiment:

In der anliegenden Zeichnung zeigen:

Figur 1
den Hauptdüsenblock einer Luftdüsenwebmaschine in der Draufsicht und
Figur 2
eine erste und eine zweite Druckluftzuführung im Bereich des freien Endes der Düsenrohre gemäß der Linie A-A in Figur 1.
The attached drawing shows:
Figure 1
the main nozzle block of an air jet loom in plan view and
Figure 2
a first and a second compressed air supply in the region of the free end of the nozzle pipes according to the line AA in FIG. 1.

Aufgrund der hohen Schussfadeneintragsleistung einer Luftdüsenwebmaschine erfolgt der Schusseintrag vorwiegend mit zwei oder mehreren Schussgarnen 1;2 unterschiedlicher Farbe, wie in Figur 1 dargestellt.
Jedes Schussgarn 1;2 wird von einem nicht dargestellten Vorspulgerät einem Schusseintragsmittel, bestehend aus einer Hauptdüse 3;4 mit Düsenrohr 3a;4a zugeführt. Eine erste Hauptdüse 3 und eine zweite Hauptdüse 4 ist mit einer an einem Ventil 8 angeschlossenen Druckleitung 10 verbunden.
Wird in einem sogenannten Mischwechsel gewoben, so wird z.B. der betreffende Längenabschnitt des Schussgarnes 1 in dem Düsenrohr 3a gehalten, in welchem mittels eines unter einem Druckniveau P1 stehenden Luftstromes auf das Schussgarn 1 eine Zugkraft mit einer vorbestimmten Zeitdauer oder während eines vorbestimmten Drehwinkelbereiches der Hauptwelle der Webmaschine ausgeübt wird. Das andere Schussgarn 2 unterliegt dem Schusseintrag.Due to the high weft insertion rate of an air jet weaving machine, the weft insertion takes place predominantly with two or more weft yarns 1, 2 of different colors, as shown in FIG.
Each weft yarn 1; 2 is fed to a weft insertion means, consisting of a main nozzle 3; 4 with nozzle tube 3a; 4a, from a pre-winding device, not shown. A first main nozzle 3 and a second main nozzle 4 are connected to a pressure line 10 connected to a valve 8.
If weaving is carried out in a so-called mixed change, for example the relevant length section of the weft yarn 1 is held in the nozzle tube 3a, in which a tensile force with a predetermined time period or during a predetermined rotation angle range of the main shaft of the main shaft of the weft yarn 1 is by means of an air flow at a pressure level P1 Loom is exercised. The other weft yarn 2 is subject to the weft insertion.

Während der Verweildauer des Längenabschnitts des einen Schussgarns 1 im Düsenrohr 3a wird der Endbereich des Längenabschnitts zusätzlich über eine im freien Endbereich des Düsenrohr 3a vorhandene Öffnung 3b mit einem unter einem Druckniveau P2 stehenden Luftstrom beaufschlagt, um einen Garnschluss zu bewirken. Mit dem erzielten Garnschluss im Bereich des freien Garnendes wird in vorteilhafter Weise verhindert, dass beim Schusseintrag das Schussgarn 1 bzw. 2 aufgedröselt wird.During the dwell time of the length section of the one weft yarn 1 in the nozzle tube 3a, the end region of the length section is additionally acted upon by an air stream which is at a pressure level P2 via an opening 3b provided in the free end region of the nozzle tube 3a in order to effect a thread closure. The yarn closure achieved in the region of the free yarn end advantageously prevents the weft yarn 1 or 2 from being unraveled when the weft is inserted.

Die Düsenrohre 3a;4a sind, wie Figur 2 zeigt, in einem mit zwei parallel verlaufenden Druckkanälen 5a;5b ausgerüsteten Verbindungsstück 5 aufgenommen, und zwar derart, dass der unter dem Druckniveau P2 stehende zweite Luftstrom über den Druckkanal 5a bzw. 5b und die Öffnung 3b bzw. 4b das Garn 1 bzw. 2 beaufschlagt wird und wechselweise ein Garnschluss im Düsenrohr 3a bzw. 4a realisiert.
An jedem der Druckkanäle 5a,5b ist über geeignete Mittel 6 eine Druckleitung 7 angeschlossen, die über ein Ventil 9 mit einer nicht dargestellten, das Druckniveau P2 des zweiten Luftstromes erzeugenden Druckquelle verbunden ist.As shown in FIG. 2, the nozzle tubes 3a; 4a are in one with two parallel ones Pressure channels 5a; 5b equipped connecting piece 5, namely in such a way that the second air flow under pressure level P2 is acted upon via the pressure channel 5a or 5b and the opening 3b or 4b, the yarn 1 or 2 and alternately a yarn closure in the nozzle tube 3a and 4a realized.
At each of the pressure channels 5a, 5b, a pressure line 7 is connected via suitable means 6, which is connected via a valve 9 to a pressure source (not shown) which generates the pressure level P2 of the second air stream.

Zeichnungslegendedrawing Legend

11
Schussgarnweft
22
Schussgarnweft
33
HauptdüseMain Jet
3a3a
Düsenrohrnozzle tube
3b3b
Öffnungopening
44
HauptdüseMain Jet
4a4a
Düsenrohrnozzle tube
4b4b
Öffnungopening
55
Verbindungsstückjoint
5a5a
Druckkanalpressure channel
5b5b
Druckkanalpressure channel
66
Mittelmedium
77
Druckleitungpressure line
88th
VentilValve
99
VentilValve
1010
Druckleitungpressure line

Claims (6)

  1. Method for interlacing non-interlaced or partially interlaced weft yarns, especially synthetic filament weft yarns on looms, according to which a length of weft yarn fed from a pre-winder with thread stopper is held by the thread stopper in a nozzle pipe of a pneumatically operated main nozzle at least for the time period between a first and a second weaving cycle and is impinged upon by a first air stream (holding air) which is at a pressure level of P1 < 1 bar and exerts a tensile force on the weft yarn, characterised in that, within the time period, the end region of the length is additionally impinged upon by a second air stream which is at a pressure level of P2 > 1 bar, preferably from 4 bar to 6 bar, and which effects the interlacing process and the flow direction of which is different from the flow direction of the first air stream.
  2. Method according to claim 1, characterised in that the additional impingement takes place in the nozzle pipe at a distance from the free end thereof.
  3. Method according to claim 1, characterised in that the additional impingement takes place in pulses within the time period.
  4. Method according to claim 1, characterised in that the additional impingement takes place upon a length of the weft yarn that is part of a yarn waste.
  5. Method according to claim 1, characterised in that the weft yarn is of any desired cross-section.
  6. Loom for carrying out the method according to claim 1, comprising at least one pneumatically operated weft yarn insertion device having a nozzle pipe, at least one controllable valve in operative connection with the weft yarn insertion device via a pressure line for the purpose of impinging by a first air stream of a predetermined pressure level P1 upon the length of a weft yarn fed from a pre-winder and held in the nozzle pipe, at least one pneumatic pressure source and a memory-programmable loom control for actuating the at least one valve, characterised in that the interior of the nozzle pipe (3a; 4a) is operatively connected, in the region of the free end, to at least one controllable valve (9) via at least one pressure line (5a; 5b) and via an aperture (3b; 4b) present in the wall of the nozzle pipe (3a; 4a).
EP03003373A 2002-03-01 2003-02-14 Method for interlacing non- or partially-interlaced weft yarn, particularly synthetic filament weft yarn, and weaving loom for carrying out this method Expired - Lifetime EP1340846B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10209278A DE10209278A1 (en) 2002-03-01 2002-03-01 Process for ironing weft yarns which have not or only partially been woven, in particular synthetic filament weft yarns, and weaving machine for carrying out the process
DE10209278 2002-03-01

Publications (3)

Publication Number Publication Date
EP1340846A2 EP1340846A2 (en) 2003-09-03
EP1340846A3 EP1340846A3 (en) 2003-11-05
EP1340846B1 true EP1340846B1 (en) 2004-12-22

Family

ID=27675170

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03003373A Expired - Lifetime EP1340846B1 (en) 2002-03-01 2003-02-14 Method for interlacing non- or partially-interlaced weft yarn, particularly synthetic filament weft yarn, and weaving loom for carrying out this method

Country Status (7)

Country Link
US (1) US6959738B2 (en)
EP (1) EP1340846B1 (en)
JP (1) JP2003278052A (en)
AT (1) ATE285491T1 (en)
DE (2) DE10209278A1 (en)
ES (1) ES2235118T3 (en)
PT (1) PT1340846E (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10256875B3 (en) * 2002-12-04 2004-09-16 Lindauer Dornier Gesellschaft Mbh Method for improving the insertion behavior of a weft yarn, in particular synthetic filament weft yarn in both fabric production on jet weaving machines, in particular air jet weaving machines and jet weaving machine for carrying out the method
JP2007239163A (en) * 2006-03-13 2007-09-20 Tsudakoma Corp Air-jet loom
JP2007239164A (en) * 2006-03-13 2007-09-20 Tsudakoma Corp Air-jet loom
DE102007015691A1 (en) 2007-03-31 2008-10-09 Lindauer Dornier Gesellschaft Mit Beschränkter Haftung Filament filling thread inserting method for air jet weaving machine, involves submitting hybird thread to intermingling process in main jet for time lying between set of web cycles
JP5439153B2 (en) * 2009-12-15 2014-03-12 津田駒工業株式会社 Weft insertion device for air jet loom
CN102776671A (en) * 2012-07-23 2012-11-14 苏州迪盛织造整理有限公司 Short fiber weft insertion and velvet absorption device
CN103757806B (en) * 2014-01-28 2015-02-11 无锡精业丝普兰科技股份有限公司 Main jet used for two-way weft insertion air jet loom
CN103757804B (en) * 2014-01-28 2015-03-25 无锡精业丝普兰科技股份有限公司 Two-way weft insertion mechanism and method of two-way weft insertion air jet loom
CN103757803B (en) * 2014-01-28 2016-03-23 无锡精业丝普兰科技股份有限公司 Main spray pipe base and main nozzle structure
JP2023110373A (en) * 2022-01-28 2023-08-09 津田駒工業株式会社 Weft insertion method and weft insertion device in air jet loom

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US4256148A (en) * 1979-04-23 1981-03-17 Scharling Ii Henry E Weaving apparatus and method
DE3739351C1 (en) * 1987-11-20 1989-02-02 Dornier Gmbh Lindauer Air nozzle for weft-thread insertion in pneumatic weaving machines
JPH03161557A (en) * 1989-11-15 1991-07-11 Murata Mach Ltd Loom
GB2259719A (en) * 1991-07-08 1993-03-24 Murata Machinery Ltd Method of operating weaving apparatus
DE19653028C1 (en) 1996-12-19 1998-01-29 Dornier Gmbh Lindauer Jet loom weft yarn preparation
US6240977B1 (en) * 2000-09-06 2001-06-05 Milliken & Company Method and apparatus for imparting and alternating twist and weaving a multi-ply yarn in continuous motion

Also Published As

Publication number Publication date
PT1340846E (en) 2005-05-31
DE10209278A1 (en) 2003-09-25
JP2003278052A (en) 2003-10-02
ES2235118T3 (en) 2005-07-01
US6959738B2 (en) 2005-11-01
DE50300209D1 (en) 2005-01-27
US20030164197A1 (en) 2003-09-04
EP1340846A3 (en) 2003-11-05
EP1340846A2 (en) 2003-09-03
ATE285491T1 (en) 2005-01-15

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