EP0053216B1 - Auxiliary nozzle for an air jet loom - Google Patents

Auxiliary nozzle for an air jet loom Download PDF

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Publication number
EP0053216B1
EP0053216B1 EP19800810369 EP80810369A EP0053216B1 EP 0053216 B1 EP0053216 B1 EP 0053216B1 EP 19800810369 EP19800810369 EP 19800810369 EP 80810369 A EP80810369 A EP 80810369A EP 0053216 B1 EP0053216 B1 EP 0053216B1
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EP
European Patent Office
Prior art keywords
nozzle
blow nozzle
air
edge
section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP19800810369
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German (de)
French (fr)
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EP0053216A1 (en
Inventor
Otto Dr. Hintsch
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.)
Sulzer AG
Original Assignee
Gebrueder Sulzer AG
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Filing date
Publication date
Application filed by Gebrueder Sulzer AG filed Critical Gebrueder Sulzer AG
Priority to DE8080810369T priority Critical patent/DE3067044D1/en
Priority to EP19800810369 priority patent/EP0053216B1/en
Publication of EP0053216A1 publication Critical patent/EP0053216A1/en
Application granted granted Critical
Publication of EP0053216B1 publication Critical patent/EP0053216B1/en
Expired legal-status Critical Current

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Classifications

    • DTEXTILES; PAPER
    • D03WEAVING
    • D03DWOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/28Looms 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
    • D03D47/30Looms 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
    • D03D47/3006Construction of the nozzles
    • D03D47/302Auxiliary nozzles

Definitions

  • the invention relates to an auxiliary blowing nozzle for the shed of an air jet loom.
  • a previous nozzle of this type (DE-A-2 145 256) consists of a tube with a rounded head, from which the air can escape through a lateral hole in the weaving shed of the weaving machine.
  • the tubular nozzle is usually guided obliquely to its longitudinal axis against the warp threads in the down position. Especially at high speed, it can happen that the warp threads are not separated with sufficient accuracy by the nozzle that is brought in, as a result of which the yarn can be damaged or torn (split).
  • the invention consists in that the free end of the nozzle which enters between the warp threads is roof-shaped and has an edge which runs essentially parallel to those warp threads which are penetrated by the latter when the nozzle is inserted into the shed.
  • the auxiliary blowing nozzle with the more or less sharp upper edge can be moved between the warp threads, whereby these are successively widened in accordance with the inclination of the roof-shaped end of the nozzle.
  • the warp threads are therefore not suddenly pushed, but gradually pushed apart or divided.
  • the auxiliary blowing nozzle according to the invention is able to work particularly smoothly and without destroying warp threads.
  • a sley 2 pivoted back and forth during weaving operation carries a reed 3, several auxiliary blowing nozzles 4 and several guide teeth 7 forming a guide channel 5 for the weft thread 6 to be inserted.
  • the nozzle 4 has a roof-shaped, upper end 8 with a more or less sharpened edge 9, see Fig. 2, 3.
  • the air is fed to the nozzle 4 through a hose 11 and a feed channel 12 according to a control program.
  • Channel 12 consists of a riser section 13 of cross section C, which is arranged eccentrically in the region of the nozzle base 14, compare in particular FIG. 4.
  • an essentially horizontally running air outlet section 15 which has a smaller cross section D than section 13.
  • the parts 3, 4, 7 then reach the position shown in solid lines in FIG. 1, in which the following weft thread 6 can be inserted.
  • the sliding surfaces provided by the nozzle 4 to the warp threads 17 can be lengthened, which results in a gentle treatment for the warp threads when retracting and extending.
  • angles A1 and A2 can also be the same size, so that the edge 9 is parallel to the warp thread plane 17.
  • edge 9a indicated by dash-dotted lines in FIG. B. slightly curved towards the right end in FIG. 2.
  • the roof-shaped end 8 z. B. vertically in the direction of the axis 30 of the riser section 13 in FIG. 3 has curved, dashed roof surfaces 8a, 8b or horizontally curved surfaces 8c according to FIG. 8.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)

Description

Die Erfindung betrifft eine Hilfsblasdüse für das Webfach einer Luftstrahlwebmaschine. Eine bisherige Düse dieser Art (DE-A-2 145 256) besteht aus einem Rohr mit gerundetem Kopf, aus dem die Luft durch eine seitliche Bohrung in das Webfach der Webmaschine auszutreten vermag. Die rohrförmige Düse wird in der Regel schräg zu ihrer Längsachse gegen die in Tieffachstellung befindlichen Kettfäden geführt. Insbesondere bei hoher Drehzahl kann es vorkommen, daß die Kettfäden durch die herangeführte Düse nicht genügend exakt geteilt werden, wodurch das Garn beschädigt oder zerrissen (gesplissen) werden kann.The invention relates to an auxiliary blowing nozzle for the shed of an air jet loom. A previous nozzle of this type (DE-A-2 145 256) consists of a tube with a rounded head, from which the air can escape through a lateral hole in the weaving shed of the weaving machine. The tubular nozzle is usually guided obliquely to its longitudinal axis against the warp threads in the down position. Especially at high speed, it can happen that the warp threads are not separated with sufficient accuracy by the nozzle that is brought in, as a result of which the yarn can be damaged or torn (split).

Der Erfindung liegt die Aufgabe zugrunde, eine besonders in dieser Hinsicht verbesserte Hilfsblasdüse zu schaffen.The invention has for its object to provide an auxiliary blowing nozzle which is particularly improved in this regard.

Die Erfindung besteht darin, daß das freie, zwischen die Kettfäden einfahrende Ende der Düse dachförmig ausgebildet ist und eine Kante besitzt, die im wesentlichen parallel zu denjenigen Kettfäden verläuft, welche beim Einfahren der Düse in das Webfach von dieser durchstoßen werden. Hierdurch läßt sich erreichen, daß die Hilfsblasdüse mit der mehr oder weniger scharfen Oberkante zwischen die Kettfäden gefahren werden kann, wodurch diese entsprechend der Schrägung des dachförmigen Endes der Düse sukzessive aufgeweitet werden. Die Kettfäden werden also nicht schlagartig, sondern allmählich auseinander geschoben bzw. geteilt. Die erfindungsgemäße Hilfsblasdüse vermag besonders störungsfrei und ohne Zerstörung von Kettfäden zu arbeiten.The invention consists in that the free end of the nozzle which enters between the warp threads is roof-shaped and has an edge which runs essentially parallel to those warp threads which are penetrated by the latter when the nozzle is inserted into the shed. In this way it can be achieved that the auxiliary blowing nozzle with the more or less sharp upper edge can be moved between the warp threads, whereby these are successively widened in accordance with the inclination of the roof-shaped end of the nozzle. The warp threads are therefore not suddenly pushed, but gradually pushed apart or divided. The auxiliary blowing nozzle according to the invention is able to work particularly smoothly and without destroying warp threads.

Weitere Merkmale ergeben sich aus der folgenden Beschreibung von Ausführungsbeispielen in Verbindung mit der Zeichnung und den Ansprüchen.

  • Fig. 1 ist ein Schnitt durch einen Teil einer Webmaschine, bei der die Erfindung angewendet ist;
  • Fig. 2 veranschaulicht ein Detail von Fig. 1, in Vorderansicht;
  • Fig. 3 ist eine zugehörige Seitenansicht,
  • Fig. 4 eine Draufsicht;
  • Fig. ist eine Vorderansicht eines abgewandelten Ausführungsbeispiels,
  • Fig. 6 eine zugehörige Seitenansicht,
  • Fig. 7 eine zugehörige Draufsicht und
  • Fig. 8 ein Schnitt nach Linie VIII-VIII in Fig. 5.
Further features result from the following description of exemplary embodiments in conjunction with the drawing and the claims.
  • Fig. 1 is a section through part of a weaving machine to which the invention is applied;
  • Fig. 2 illustrates a detail of Fig. 1 in front view;
  • 3 is an associated side view,
  • 4 is a top view;
  • Fig. Is a front view of a modified embodiment,
  • 6 is an associated side view,
  • Fig. 7 is an associated plan view and
  • 8 is a section along line VIII-VIII in Fig. 5th

Eine gemäß Pfeil 1 während des Webbetriebes hin und her verschwenkte Weblade 2 trägt ein Riet 3, mehrere Hilfsblasdüsen 4 und mehrere einen Führungskanal 5 für den einzutragenden Schußfaden 6 bildende Führungszähne 7. Die Düse 4 besitzt ein dachförmiges, oberes Ende 8 mit einer mehr oder weniger geschärften Kante 9, vergleiche Fig. 2, 3. Die Luft wird der Düse 4 durch einen Schlauch 11 und einen Zuführungskanal 12 entsprechend einem Steuerprogramm zugeleitet. Kanal 12 besteht aus einem Steigabschnitt 13 vom Querschnitt C, der im Bereich des Düsenfußes 14 exzentrisch angeordnet ist, vergleiche besonders Fig.4. Im oberen Teil der Düse 4 schließt an den Steigabschnitt 13 ein im wesentlichen horizontal verlaufender Luftaustrittsabschnitt 15 an, der geringeren Querschnitt D besitzt, als der Abschnitt 13. Durch die Querschnittsverkleinerung im Abschnitt 15 läßt sich in diesem eine Drosselwirkung der Strömung erzielen. Die Luft tritt durch eine Öffnung 16 in den Fadenführungskanal 5 aus, wodurch der Schußfaden 6 durch das von den Kettfäden 17, 18 gebildete Webfach 19 getragen wird. Die Kante 9 verläuft im wesentlichen parallel zu den Kettfäden 17.A sley 2 pivoted back and forth during weaving operation carries a reed 3, several auxiliary blowing nozzles 4 and several guide teeth 7 forming a guide channel 5 for the weft thread 6 to be inserted. The nozzle 4 has a roof-shaped, upper end 8 with a more or less sharpened edge 9, see Fig. 2, 3. The air is fed to the nozzle 4 through a hose 11 and a feed channel 12 according to a control program. Channel 12 consists of a riser section 13 of cross section C, which is arranged eccentrically in the region of the nozzle base 14, compare in particular FIG. 4. In the upper part of the nozzle 4 adjoins the riser section 13, an essentially horizontally running air outlet section 15, which has a smaller cross section D than section 13. By reducing the cross section in section 15, a throttling effect of the flow can be achieved in this section. The air exits through an opening 16 into the thread guide channel 5, whereby the weft thread 6 is carried by the shed 19 formed by the warp threads 17, 18. The edge 9 runs essentially parallel to the warp threads 17.

Während des Schußeintrages befindet sich die Lade 2 mit den von ihr getragenen Teilen 3, 4, 7 in der in Fig. 1 ausgezogen dargestellten Wirkungsstellung. Die Düse 4 und die Führungszähne 7 sind in das Webfach 19 durch die in Tieffachstellung stehenden Kettfäden 17 hindurch eingefahren. Nach beendigtem Schußeintrag werden die Teile 3, 4, 7 entsprechend Pfeil 21 in Fig. 1 im Gegenuhrzeigersinn verschwenkt, so daß die Düse 4 und die Führungszähne 7 in eine wirkungslose, nicht dargestellte Position außerhalb des Webfaches 19 gelangen. Das Riet 3 schlägt den Schußfaden 6 an die Anschlagstelle 24 des Gewebes 25 an.During the weft insertion, the drawer 2 with the parts 3, 4, 7 carried by it is in the operative position shown in solid lines in FIG. 1. The nozzle 4 and the guide teeth 7 are inserted into the shed 19 through the warp threads 17 in the down position. After the weft insertion is complete, the parts 3, 4, 7 are pivoted counterclockwise according to arrow 21 in FIG. 1, so that the nozzle 4 and the guide teeth 7 reach an ineffective position, not shown, outside the shed 19. The reed 3 strikes the weft thread 6 against the stop point 24 of the fabric 25.

Vor dem folgenden Schußeintrag werden die Teile 3, 4, 7 wieder im Uhrzeigersinn verschwenkt. Dabei durchfahren sie die in Fig. 1 strichpunktiert eingezeichnete Position 3a, 4a, 7a, in der die obere Kante 9 des dachförmigen Endes 8 der Düse 4 in einem Winkel A2 gegenüber der Mittelebene 26 des Webfaches 19 steht, welcher etwas größer ist als der Winkel A1 der Tieffachkettfäden 17. Dadurch wird erzielt, daß die Kante 9 bei der folgenden Bewegung - beginnend mit dem Ende bzw. der Ecke 20 - unter spitzem Winkel B, also schräg durch die Kettfäden 17 fährt und diese sukzessive von der Kante 9 geteilt werden.Before the following weft entry, the parts 3, 4, 7 are pivoted clockwise again. 1, position 3a, 4a, 7a, in which the upper edge 9 of the roof-shaped end 8 of the nozzle 4 is at an angle A2 relative to the central plane 26 of the shed 19, which is slightly larger than the angle A1 of the deep shed warp threads 17. This ensures that the edge 9 during the following movement - starting with the end or the corner 20 - moves at an acute angle B, that is to say diagonally through the warp threads 17 and these are successively divided by the edge 9.

Anschließend gelangen die Teile 3, 4, 7 in die in Fig. 1 ausgezogen dargestellte Position, in welcher der folgende Schußfaden 6 eingetragen werden kann.The parts 3, 4, 7 then reach the position shown in solid lines in FIG. 1, in which the following weft thread 6 can be inserted.

Dadurch, daß der horizontale Luftaustrittsabschnitt 15 zwischen den Steigabschnitt 13 des Kanals 12 und die Austrittsöffnung 16 geschaltet ist, ist Gewähr dafür gegeben, daß an der Winkelstelle 27 infolge der Abwinkelung entstehende Luftwirbel wieder beruhigt werden bzw. die Luftströmung parallelisiert wird, bevor die Luft aus der Öffnung 16 austritt. Der Luftstrahl 28 ist dadurch weitgehend wirbelfrei, so daß er die in Fig. 4 ersichtliche. schräg zum Schußfaden 6 verlaufende Richtung besonders lange beizuhalten vermag. Die richtungsorientierte Tragwirkung in Bezug auf den Schußfaden 6 läßt sich dadurch erhöhen.Due to the fact that the horizontal air outlet section 15 is connected between the riser section 13 of the channel 12 and the outlet opening 16, there is a guarantee that air vortices arising at the angular point 27 as a result of the bend will be calmed down again or the air flow will be parallelized before the air comes out the opening 16 emerges. The air jet 28 is thereby largely vortex-free, so that it can be seen in FIG. is able to maintain an oblique direction to the weft thread 6 for a particularly long time. The direction-oriented load-bearing action with respect to the weft thread 6 can thereby be increased.

Bei der abgewandelten Ausführungsform nach Fig. 5-8 enthält die Hilfsblasdüse 4a einen Schaft 4b von ovalem Querschnitt.In the modified embodiment according to FIGS. 5-8, the auxiliary blowing nozzle 4a contains one Shank 4b of oval cross section.

Dadurch können die den Kettfäden 17 von der Düse 4 gebotenen Gleitflächen verlängert werden, wodurch sich eine schonende Behandlung für die Kettfäden beim Ein- und Ausfahren ergibt.As a result, the sliding surfaces provided by the nozzle 4 to the warp threads 17 can be lengthened, which results in a gentle treatment for the warp threads when retracting and extending.

Die Winkel A1 und A2 können auch gleich groß sein, so daß die Kante 9 parallel zu der Kettfadenebene 17 steht.The angles A1 and A2 can also be the same size, so that the edge 9 is parallel to the warp thread plane 17.

Bei einer abgewandelten Ausführungsform ist die in Fig. 2 strichpunktiert angedeutete Kante 9a z. B. gegen das in Fig. 2 rechte Ende hin leicht gekrümmt. Weitere Ausführungsbeispiele ergeben sich, wenn das dachförmige Ende 8 z. B. vertikal in Richtung der Achse 30 des Steigabschnittes 13 in Fig. 3 gewölbte, gestrichelt angedeutete Dachflächen 8a, 8b aufweist oder aber horizontal gewölbte Flächen 8c gemäß Fig. 8.In a modified embodiment, the edge 9a indicated by dash-dotted lines in FIG. B. slightly curved towards the right end in FIG. 2. Further embodiments result when the roof-shaped end 8 z. B. vertically in the direction of the axis 30 of the riser section 13 in FIG. 3 has curved, dashed roof surfaces 8a, 8b or horizontally curved surfaces 8c according to FIG. 8.

Claims (5)

1. An auxiliary blow nozzle for an air jet power loom, characterized in that the free end (8) of the blow nozzle (4) for entering between two warp yarns (17) in a shed of the loom is roof shaped and has an edge (9) substantially paralle to those warp yarns (17), which on entering of the blow nozzle (4) into the shed (19) are severed by the nozzle.
2. An auxiliary blow nozzle according to claim 1, characterized in that the edge (9) of the nozzle end (8) is at a slight angle to the warp yarn plane (17) in such a way that on entering the nozzle (4) into the warp yarn plane the end (20) of the edge (9) being more adjacent to the beat up point (24) enters into the warp yarn plane (17).
3. An auxiliary blow nozzle according to claim 1 or 2, characterized in that a foot (14) is provided below and eccentric to the roof shaped end (8), an air feed duct (12) extending through said foot.
4. An auxiliary blow nozzle according to one of the preceding claims, characterized in that the air feed duct (12) includes a rising section (13) parallel to said foot (14) and an air outlet section (15) perpendicular to said rising section.
5. An auxiliary blow nozzle according to one of the preceding claims, characterized in that said rising section (13) has a cross-sectional area (C) greater than the cross-sectional area (D) of said air outlet section whereby a throttling effect occurs therein during a flow of air therethrough.
EP19800810369 1980-11-28 1980-11-28 Auxiliary nozzle for an air jet loom Expired EP0053216B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE8080810369T DE3067044D1 (en) 1980-11-28 1980-11-28 Auxiliary nozzle for an air jet loom
EP19800810369 EP0053216B1 (en) 1980-11-28 1980-11-28 Auxiliary nozzle for an air jet loom

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19800810369 EP0053216B1 (en) 1980-11-28 1980-11-28 Auxiliary nozzle for an air jet loom

Publications (2)

Publication Number Publication Date
EP0053216A1 EP0053216A1 (en) 1982-06-09
EP0053216B1 true EP0053216B1 (en) 1984-03-14

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ID=8187466

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EP19800810369 Expired EP0053216B1 (en) 1980-11-28 1980-11-28 Auxiliary nozzle for an air jet loom

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DE (1) DE3067044D1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58208441A (en) * 1982-05-26 1983-12-05 日産自動車株式会社 Wefting apparatus of air jet loom
EP0145824B1 (en) * 1983-12-09 1987-03-04 GebràœDer Sulzer Aktiengesellschaft Auxiliary nozzle for an air jet loom
DE3643058A1 (en) * 1986-11-21 1988-06-30 Picanol Nv NOZZLE WEAVING MACHINE
CN102839486A (en) * 2012-09-13 2012-12-26 吴江市隆泰喷织厂 Stable position seat for auxiliary nozzle of air jet loom

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT268158B (en) * 1965-09-11 1969-02-10 Elitex Zavody Textilniho Grab gates
CS165002B1 (en) * 1970-09-18 1975-11-28
CS149198B1 (en) * 1971-07-27 1973-05-24
CH547368A (en) * 1972-02-08 1974-03-29 Vyzk Vyvojovy Ustav Vseobe LAMELLA OF A STOP AND GUIDE COMB FOR A PNEUMATIC THUS WEAVING MACHINE.
CH572117A5 (en) * 1974-09-11 1976-01-30 Rueti Ag Maschf

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Publication number Publication date
EP0053216A1 (en) 1982-06-09
DE3067044D1 (en) 1984-04-19

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