EP0423066A1 - Nozzle for air jet loom - Google Patents

Nozzle for air jet loom Download PDF

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Publication number
EP0423066A1
EP0423066A1 EP90810696A EP90810696A EP0423066A1 EP 0423066 A1 EP0423066 A1 EP 0423066A1 EP 90810696 A EP90810696 A EP 90810696A EP 90810696 A EP90810696 A EP 90810696A EP 0423066 A1 EP0423066 A1 EP 0423066A1
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EP
European Patent Office
Prior art keywords
nozzle
cover body
opening area
nozzle according
opening
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.)
Withdrawn
Application number
EP90810696A
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German (de)
French (fr)
Inventor
Paul Gunneman
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
Sulzer AG
Gebrueder Sulzer AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sulzer AG, Gebrueder Sulzer AG filed Critical Sulzer AG
Publication of EP0423066A1 publication Critical patent/EP0423066A1/en
Withdrawn legal-status Critical Current

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    • 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
    • D03D47/302—Auxiliary nozzles

Definitions

  • the invention relates to a nozzle according to the preamble of claim 1 and an air jet machine with such nozzles.
  • the weft is inserted by means of a main nozzle, which accelerates the weft thread and blows it into the warp compartment, and usually additionally by means of a series of auxiliary nozzles, which are arranged over the entire width of the weave and which are used for the further transport of the weft thread through the Provide warp compartment.
  • auxiliary nozzles are also called relay nozzles.
  • the air output of the relay nozzle is controlled and matched to the flight of the thread. The result is a wandering flow field, through which the energy requirement for the compressed air is reduced.
  • Air jet looms are distinguished from other types of unprotected weaving machines, namely projectile and rapier weaving machines, by higher weft insertion performance and, in the weft insertion device, by less mechanically moving machine parts.
  • One disadvantage is an increased energy requirement; because the energy transfer from the compressed air to the weft to be conveyed is associated with great losses.
  • this object is achieved by the characterizing part of claim 1.
  • the advantage of the invention can be seen in the fact that with the adjustment device of the nozzle, with which the outflowing quantity of the fluid jet is changed, an additional adaptation parameter is created, which enables a reduction in the compressed air requirement.
  • the amount of air emitted per relay nozzle can be optimally adjusted depending on the location and with the same duration of the air emission.
  • a cover body is used to change the open area of the nozzle openings, which can be moved translationally along the longitudinal axis of the relay nozzle and / or rotatively around the longitudinal axis.
  • the cover body can be a body with no openings or a perforated body.
  • the perforation of the cover body which is formed from channels or hole-like openings, serves to enable free or partially free passage from the nozzle interior to the opening area, which preferably consists of several individual openings.
  • a hollow body can be mentioned as an example of a deformable body be, which consists entirely or partially of elastomeric material and which provides the change in shape by changing its internal pressure.
  • the adjusting device of the cover body allows it to be fixed in the position that is determined to be optimal. In order to be able to set such a position in a reproducible manner, it is advantageous to take constructive measures in the adjusting device by means of which the sealing body can be fixed in predetermined positions, for example by latching.
  • the cover body only fulfills its function sufficiently if it sufficiently seals the area of the opening area to be covered.
  • its cover surface When moving the cover body, its cover surface must slide over the surface to be covered and must not stand out. This can be achieved by geometric measures by orienting the surface to be covered so that it is parallel to the direction of displacement of the cover body. Another possibility is to press the cover body against the surface to be covered with a spring force exerted by the adjusting device. In this case, the area of the opening area may deviate somewhat from the parallelism to the direction of movement of the cover body.
  • the nozzle openings do not have to be circular, but they can also have a slot shape, for example. By partially covering the individual openings, their shape and size can be changed.
  • the energy requirement for the weft insertion can already decrease considerably if the degree of opening of the relay nozzles is fixed but optimally set. It is then sufficient to set the relay nozzles manually before changing the article.
  • a controllable adjusting device with which the relay nozzles can be set as a function of time during the operation of the weaving machine.
  • the relay nozzle must be inserted into the warp compartment for the weft insertion and pierce the lower warp thread sheet.
  • the warp threads can be stressed only slightly and the abrasion on the surface of the nozzle can be kept low.
  • the nozzle 1 With a screw part 2, which remains outside the warp compartment, the nozzle 1 is fastened to a base 3, which in turn is attached to the sley and via which compressed air is fed into the nozzle 1.
  • the opening area 4 is located in the head part 1a of the nozzle 1.
  • the head part 1 a is enlarged in FIG. 2 and is shown in a perspective view with a view of the opening area 4.
  • the opening area 4 consists of sieve-like individual openings 5.
  • Inside the nozzle 1 there are parts of the adjusting device, namely the cover body 6 and the holder 7. Fixing and guiding elements of the adjusting device are located in the base 3 and are not shown.
  • the holder 7, which can be moved in the longitudinal direction of the nozzle 1, is prestressed and exerts a spring force acting on the cover body 6 against the opening area 4.
  • the opening area 4 is wedge-shaped, the inner flank of the wedge running parallel to the longitudinal axis and thus parallel to the direction of movement of the cover body 6.
  • FIG. 4 shows in detail the cover body 6 belonging to the nozzle 1 of FIG. 2, shown as a view from the cavity side.
  • the lower double row of the individual openings 5 is closed by the edge region of the upper, toothed edge 6a of the cover body 6.
  • the cover body 6 is pressed onto the surface of the opening region 4 to be covered by the pretensioning of the holder 7 and the excess pressure acting within the nozzle.
  • a perforated cover body 8 is shown in FIG. 5 in the same view as for the exemplary embodiment in FIG.
  • FIG. 6 shows an embodiment with slot-shaped individual openings 10 which are partially covered by a compact cover body 6.
  • FIG. 7 shows a mandrel-shaped relay nozzle 11 with a conical head part 11a
  • the Opening area 14 has three vertical rows with individual openings 15.
  • the rotatable body shown in FIG. 7b which includes the cover body 12 and the holder tube 13, is located within the nozzle 11 shown in FIG.
  • the cover body 12 is an obliquely cut cone with a bore oriented obliquely to the cone axis.
  • a variable degree of opening of the opening region 14 can be realized by rotating the cover body 12 about the longitudinal axis of the nozzle 11.
  • the uppermost individual opening 150 is always open in the exemplary embodiment shown.

Abstract

The nozzle (1), which can be used as an auxiliary nozzle or relay nozzle for a pneumatic loom, has means by which the outflowing quantity of a fluid jet can be varied. The cross-section of the nozzle orifices (5) can be varied by the linear displacement and/or the rotation of a cover body (6). The degree of opening of the nozzle can be adjusted so that a minimum quantity of compressed air for weft insertion becomes possible.

Description

Die Erfindung betrifft eine Düse gemäss dem Oberbegriff des Anspruchs 1 sowie eine Luftwebmaschine mit derartigen Düsen.The invention relates to a nozzle according to the preamble of claim 1 and an air jet machine with such nozzles.

Bei pneumatischen Webmaschinen, im besondern bei Luftweb­maschinen, erfolgt der Schusseintrag mittels einer Haupt­düse, die den Schussfaden beschleunigt und ins Kettfach einbläst, und üblicherweise zusätzlich mittels einer Se­rie von Hilfsdüsen, die über die gesamte Webbreite ange­ordnet sind und die für den Weitertransport des Schuss­fadens durch das Kettfach sorgen. Diese Hilfsdüsen werden auch Stafettendüsen genannt. Der Luftausstoss der Stafet­tendüse erfolgt gesteuert und auf den Flug des Fadens abgestimmt. Es ergibt sich so ein wanderndes Strömungs­feld, durch das der Energiebedarf für die Druckluft redu­ziert wird.In pneumatic weaving machines, especially in air-jet weaving machines, the weft is inserted by means of a main nozzle, which accelerates the weft thread and blows it into the warp compartment, and usually additionally by means of a series of auxiliary nozzles, which are arranged over the entire width of the weave and which are used for the further transport of the weft thread through the Provide warp compartment. These auxiliary nozzles are also called relay nozzles. The air output of the relay nozzle is controlled and matched to the flight of the thread. The result is a wandering flow field, through which the energy requirement for the compressed air is reduced.

Luftdüsenwebmaschinen zeichnen sich gegenüber andern Ty­pen von schützenlosen Webmaschinen, nämlich Projektil- und Greiferwebmaschinen, durch höhere Schusseintrags­leistung und bei der Schusseintragsvorrichtung durch weniger mechanisch bewegte Maschinenteile aus. Ein Nach­teil ist allerdings ein erhöhter Energiebedarf; denn die Energieübertragung von der Druckluft auf den zu fördern­den Schussfaden ist mit grossen Verlusten verbunden.Air jet looms are distinguished from other types of unprotected weaving machines, namely projectile and rapier weaving machines, by higher weft insertion performance and, in the weft insertion device, by less mechanically moving machine parts. One disadvantage, however, is an increased energy requirement; because the energy transfer from the compressed air to the weft to be conveyed is associated with great losses.

Es ist Aufgabe der vorliegenden Erfindung, Düsen zu schaffen, die mit Mitteln versehen sind, die in Ergänzung zur gesteuerten Erzeugung des erwähnten Wanderfeldes dazu dienen, den Betrieb der pneumatischen Webmaschine weiter energetisch zu optimieren.It is an object of the present invention to provide nozzles which are provided with means which, in addition to the controlled generation of the traveling field mentioned, serve to further energetically optimize the operation of the pneumatic weaving machine.

Diese Aufgabe wird erfindungsgemäss durch das Kennzeichen des Anspruchs 1 gelöst. Der Vorteil der Erfindung ist darin zu sehen, dass mit der Verstellvorrichtung der Dü­se, mit der die ausströmende Menge des Fluidstrahls ver­ändert wird, ein zusätzlicher Anpassungsparameter ent­steht, der eine Reduktion des Druckluftbedarfs ermög­licht. So kann im Fall der Luftwebmaschine bei gleicher Dauer des Luftausstosses die pro Stafettendüse abgegebene Luftmenge ortsabhängig optimal angepasst werden.According to the invention, this object is achieved by the characterizing part of claim 1. The advantage of the invention can be seen in the fact that with the adjustment device of the nozzle, with which the outflowing quantity of the fluid jet is changed, an additional adaptation parameter is created, which enables a reduction in the compressed air requirement. In the case of the air-jet weaving machine, the amount of air emitted per relay nozzle can be optimally adjusted depending on the location and with the same duration of the air emission.

Vorteilhafte Ausführungsformen der Erfindung sind in den Ansprüchen 2 bis 10 angegeben. Zum Aendern der offenen Fläche der Düsenöffnungen dient in einer bevorzugten Aus­führungsform ein Abdeckkörper, der translativ entlang der Längsachse der Stafettendüse und/oder rotativ um die Längsachse verschoben werden kann. Der Abdeckkörper kann ein keine Durchbrüche aufweisender oder ein perforierter Körper sein. Im zweiten Fall dient die Perforation des Abdeckkörpers, die aus Kanälen oder lochartigen Oeffnun­gen gebildet wird, dazu, den freien oder teilweise freien Durchgang aus dem Düseninnenraum zum Oeffnungsbereich, der bevorzugt aus mehrern Einzelöffnungen besteht, zu ermöglichen.Advantageous embodiments of the invention are specified in claims 2 to 10. In a preferred embodiment, a cover body is used to change the open area of the nozzle openings, which can be moved translationally along the longitudinal axis of the relay nozzle and / or rotatively around the longitudinal axis. The cover body can be a body with no openings or a perforated body. In the second case, the perforation of the cover body, which is formed from channels or hole-like openings, serves to enable free or partially free passage from the nozzle interior to the opening area, which preferably consists of several individual openings.

Andere Möglichkeiten zur Abdeckung von Teilen des Oeffnungsbereichs bestehen darin, durch Formänderungen von Körpern die Abdeckung vorzunehmen. Als Beispiel für einen verformbaren Körper kann ein Hohlkörper genannt werden, der ganz oder teilweise aus elastomeren Material besteht und der durch Veränderung seines Innendrucks die Formänderung liefert.Other options for covering parts of the opening area are to carry out the covering by changing the shape of bodies. A hollow body can be mentioned as an example of a deformable body be, which consists entirely or partially of elastomeric material and which provides the change in shape by changing its internal pressure.

Die Verstellvorrichtung des Abdeckkörpers erlaubt es, diesen in der als optimal festgestellten Position zu fi­xieren. Um eine solche Position reproduzierbar einstellen zu können, ist es vorteilhaft, bei der Verstellvorrich­tung konstruktive Massnahmen vorzunehmen, durch die der Dichtkörper in vorgegebenen Positionen, beispielsweise durch Einrasten, fixierbar ist.The adjusting device of the cover body allows it to be fixed in the position that is determined to be optimal. In order to be able to set such a position in a reproducible manner, it is advantageous to take constructive measures in the adjusting device by means of which the sealing body can be fixed in predetermined positions, for example by latching.

Der Abdeckkörper erfüllt seine Funktion nur ausreichend, wenn er die abzudeckende Fläche des Oeffnungsbereichs hinlänglich gut verschliesst. Beim Verschieben des Ab­deckkörpers muss daher dessen Abdeckfläche über die abzu­deckende Fläche gleiten und darf sich dabei nicht abhe­ben. Dies kann man durch geometrische Massnahmen errei­chen, indem man die abzudeckende Fläche so orientiert, dass sie zur Verschieberichtung des Abdeckkörpers paral­lel liegt. Eine andere Möglichkeit besteht darin, den Abdeckkörper mit einer durch die Verstellvorrichtung aus­geübten Federkraft gegen die abzudeckende Fläche anzu­drücken. In diesem Fall darf die Fläche des Oeffnungs­bereichs etwas von der Parallelität zur Bewegungsrichtung des Abdeckkörpers abweichen.The cover body only fulfills its function sufficiently if it sufficiently seals the area of the opening area to be covered. When moving the cover body, its cover surface must slide over the surface to be covered and must not stand out. This can be achieved by geometric measures by orienting the surface to be covered so that it is parallel to the direction of displacement of the cover body. Another possibility is to press the cover body against the surface to be covered with a spring force exerted by the adjusting device. In this case, the area of the opening area may deviate somewhat from the parallelism to the direction of movement of the cover body.

Die Düsenöffnungen müssen selbstverständlich nicht kreis­förmig sein, sondern sie können beispielsweise auch eine Schlitzform aufweisen. Durch teilweises Abdecken der Ein­zelöffnungen, kann deren Form und Grösse verändert wer­den.Of course, the nozzle openings do not have to be circular, but they can also have a slot shape, for example. By partially covering the individual openings, their shape and size can be changed.

Der Energiebedarf für den Schusseintrag kann sich schon erheblich verringern, wenn der Oeffnungsgrad der Stafet­tendüsen fest aber in optimaler Weise eingestellt ist. Es genügt dann, jeweils vor dem Wechsel des Artikels die Einstellung der Stafettendüsen manuell vorzunehmen. Vor­teilhafter aber, was den Energiebedarf anbetrifft, ist eine steuerbare Verstellvorrichtung, mit der während des Betriebs der Webmaschine die Stafettendüsen zeitabhängig eingestellt werden können.The energy requirement for the weft insertion can already decrease considerably if the degree of opening of the relay nozzles is fixed but optimally set. It is then sufficient to set the relay nozzles manually before changing the article. However, what is more advantageous with regard to the energy requirement is a controllable adjusting device with which the relay nozzles can be set as a function of time during the operation of the weaving machine.

Im folgenden wird die Erfindung anhand mehrerer Ausfüh­rungsbeispiele beschrieben. Es zeigen:

  • Fig.1a eine zungenförmige Stafettendüse als Pro­jektion in Kettrichtung,
  • Fig.1b eine Ansicht auf die Stafettendüse gemäss Pfeil II in Fig.1a,
  • Fig.2 eine perspektivische Ansicht des Kopfteils der Stafettendüse aus Fig.1,
  • Fig.3 einen Querschnitt nach Linie III - III in Fig.2 durch den Kopfteil einer etwas modi­fizierten Stafettendüse,
  • Fig.4 die Austrittsöffnung mit Abdeckkörper, gesehen von der Hohlraumseite her,
  • Fig.5 eine Variante zur in Fig.4 dargestellten Austrittspartie,
  • Fig.6 eine zweite Variante mit zwei schlitzför­migen Einzelöffnungen,
  • Fig.7a den Kopfteil einer dornartigen Stafetten­düse,
  • Fig.7b eine Ansicht des in der Düse der Fig.7a enthaltenen Abdeckkörpers
  • Fig.7c und einen Längsschnitt durch die Düse.
The invention is described below using several exemplary embodiments. Show it:
  • 1a a tongue-shaped relay nozzle as a projection in the warp direction,
  • 1b shows a view of the relay nozzle according to arrow II in FIG. 1a,
  • 2 shows a perspective view of the head part of the relay nozzle from FIG. 1,
  • 3 shows a cross section along line III-III in FIG. 2 through the head part of a somewhat modified relay nozzle,
  • 4 the outlet opening with cover body, seen from the cavity side,
  • 5 shows a variant of the outlet section shown in FIG. 4,
  • 6 shows a second variant with two slit-shaped individual openings,
  • 7a the head part of a mandrel-like relay nozzle,
  • 7b is a view of the cover body contained in the nozzle of Fig.7a
  • 7c and a longitudinal section through the nozzle.

Die Stafettendüse muss für den Schusseintrag ins Kettfach eintauchen und dabei die untere Kettfadenschar durchste­chen. Mit der in Fig.1 dargestellten Form der Stafetten­düse 1 gelingt es, die Kettfäden nur wenig zu beanspru­chen und den Abrieb an der Düsenoberfläche gering zu hal­ten. Mit einem Schraubteil 2, der ausserhalb des Kett­fachs bleibt, ist die Düse 1 auf einem Sockel 3 befe­stigt, der seinerseits auf der Weblade angebracht ist und über den die Zufuhr von Druckluft in die Düse 1 erfolgt. Im Kopfteil 1a der Düse 1 befindet sich der Oeffnungs­bereich 4.The relay nozzle must be inserted into the warp compartment for the weft insertion and pierce the lower warp thread sheet. With the shape of the relay nozzle 1 shown in FIG. 1, the warp threads can be stressed only slightly and the abrasion on the surface of the nozzle can be kept low. With a screw part 2, which remains outside the warp compartment, the nozzle 1 is fastened to a base 3, which in turn is attached to the sley and via which compressed air is fed into the nozzle 1. The opening area 4 is located in the head part 1a of the nozzle 1.

Der Kopfteil 1a ist in Fig.2 vergrössert und in perspek­tivischer Ansicht mit Sicht mit den Oeffnungsbereich 4 dargestellt. Der Oeffnungsbereich 4 besteht aus siebartig angeordneten Einzelöffnungen 5. Innerhalb der Düse 1 be­finden sich Teile der Verstellvorrichtung, nämlich der Abdeckkörper 6 und der Halter 7. Fixier- und Führungsele­mente der Verstellvorrichtung befinden sich im Sockel 3 und sind nicht dargestellt. Der Halter 7, der in Längs­richtung der Düse 1 verschiebar ist, ist vorgespannt und übt auf den Abdeckkörper 6 eine gegen die Oeffnungsbe­reich 4 wirkende Federkraft aus.The head part 1 a is enlarged in FIG. 2 and is shown in a perspective view with a view of the opening area 4. The opening area 4 consists of sieve-like individual openings 5. Inside the nozzle 1 there are parts of the adjusting device, namely the cover body 6 and the holder 7. Fixing and guiding elements of the adjusting device are located in the base 3 and are not shown. The holder 7, which can be moved in the longitudinal direction of the nozzle 1, is prestressed and exerts a spring force acting on the cover body 6 against the opening area 4.

Fig.3 zeigt im Längsschnitt eine zweite Variante des Kopfteils 1a. Hier ist der Oeffnungsbereich 4 keilförmig ausgebildet, wobei die innere Flanke des Keils parallel zur Längsachse und damit parallel zur Bewegungsrichtung des Abdeckkörpers 6 verläuft. Der Abdeckkörper 6, der eine kompakte, d.h. keine Durchbrüche aufweisende Platte ist, und ein Teil des Halters 7 sind in seitlicher An­sicht erkennbar.3 shows in longitudinal section a second variant of the head part 1a. Here, the opening area 4 is wedge-shaped, the inner flank of the wedge running parallel to the longitudinal axis and thus parallel to the direction of movement of the cover body 6. The cover body 6, which is a compact, i.e. is no plate having openings, and part of the holder 7 can be seen in a side view.

Fig.4 zeigt im Detail den zur Düse 1 der Fig.2 gehörenden Abdeckkörper 6, als Ansicht von der Hohlraumseite her dargestellt. Die untere Doppelreihe der Einzelöffnungen 5 ist durch den Randbereich der obern, gezahnten Kante 6a des Abdeckkörpers 6 verschlossen. Durch die Vorspannung des Halters 7 sowie den innerhalb der Düse wirkenden Ueberdruck wird der Abdeckkörper 6 auf die abzudeckende Fläche des Oeffnungsbereichs 4 gepresst.4 shows in detail the cover body 6 belonging to the nozzle 1 of FIG. 2, shown as a view from the cavity side. The lower double row of the individual openings 5 is closed by the edge region of the upper, toothed edge 6a of the cover body 6. The cover body 6 is pressed onto the surface of the opening region 4 to be covered by the pretensioning of the holder 7 and the excess pressure acting within the nozzle.

Ein perforierter Abdeckkörper 8 ist in Fig.5 in gleicher Ansicht wie für das Ausführungsbeispiel in Fig.4 darge­stellt. Die Durchtrittsöffnungen 9, die in Deckung mit den Einzelöffnungen 5 des Oeffnungsbereicha 4 gebracht werden können, verringern durch Verschieben des Abdeck­körpers 8 die offene Fläche des Oeffnungsbereichs 4.A perforated cover body 8 is shown in FIG. 5 in the same view as for the exemplary embodiment in FIG. The passage openings 9, which can be brought into register with the individual openings 5 of the opening area 4, reduce the open area of the opening area 4 by moving the cover body 8.

Fig.6 zeigt eine Ausführungsform mit schlitzförmigen Ein­zelöffnungen 10, die von einem kompakten Abdeckkörper 6 teilweise abgedeckt sind.6 shows an embodiment with slot-shaped individual openings 10 which are partially covered by a compact cover body 6.

In Fig.7 ist eine dornförmige Stafettendüse 11 mit einem konischen Kopfteil 11a dargestellt, dessen Oeffnungsbereich 14 drei vertikale Reihen mit Einzelöff­nungen 15 aufweist. Innerhalb der in Fig.7a gezeigten Düse 11 befindet sich der in Fig.7b dargestellte drehbare Körper, der den Abdeckkörper 12 und das Halterrohr 13 umfasst. Der Abdeckkörper 12 ist ein schräg angeschnitte­ner Kegel mit einer schief zur Kegelachse orientierten Bohrung. Wie man sich anhand der Fig.7c klar machen kann, lässt sich durch Drehen des Abdeckkörpers 12 um die Längsachse der Düse 11 ein variabler Oeffnungsgrad des Oeffnungsbereichs 14 realisieren. Die oberste Einzelöff­nung 150 ist im gezeigten Ausführungsbeispiel immer ge­öffnet.7 shows a mandrel-shaped relay nozzle 11 with a conical head part 11a, the Opening area 14 has three vertical rows with individual openings 15. The rotatable body shown in FIG. 7b, which includes the cover body 12 and the holder tube 13, is located within the nozzle 11 shown in FIG. The cover body 12 is an obliquely cut cone with a bore oriented obliquely to the cone axis. As can be seen from FIG. 7c, a variable degree of opening of the opening region 14 can be realized by rotating the cover body 12 about the longitudinal axis of the nozzle 11. The uppermost individual opening 150 is always open in the exemplary embodiment shown.

Claims (12)

1. Düse (1) für eine pneumatische Webmaschine mit minde­stens einer Oeffnung (5) für den Austritt eines Fluid­strahls, gekennzeichnet durch Mittel zum Verändern des Querschnitts des Oeffnungsbereichs (4).1. Nozzle (1) for a pneumatic weaving machine with at least one opening (5) for the exit of a fluid jet, characterized by means for changing the cross section of the opening area (4). 2. Düse (1) nach Anspruch 1, dadurch gekennzeichnet, dass ein verstellbarer Abdeckkörper (6) für den Oeffnungsbe­reich (4) vorhanden ist, mit dem je nach Stellung des Abdeckkörpers (6) die offene Fläche zumindest teilweise abgedeckt oder frei ist.2. Nozzle (1) according to claim 1, characterized in that an adjustable cover body (6) for the opening area (4) is provided, with which, depending on the position of the cover body (6), the open area is at least partially covered or free. 3. Düse nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Abdeckkörper (6) linear verschiebbar ist.3. Nozzle according to claim 1 or 2, characterized in that the cover body (6) is linearly displaceable. 4. Düse nach einem der Ansprüche 1 bis 3, dadurch gekenn­zeichnet, dass der Abdeckkörper (12) drehbar ist.4. Nozzle according to one of claims 1 to 3, characterized in that the cover body (12) is rotatable. 5. Düse nach einem der Ansprüche 1 bis 4, dadurch gekenn­zeichnet, dass der Abdeckkörper (6) ein Körper ohne Durchbrüche und mit einer Kante (6a) ist, die den Oeffnungsbereich (4) in eine freie und eine abgedeckte Zone unterteilt.5. Nozzle according to one of claims 1 to 4, characterized in that the cover body (6) is a body without openings and with an edge (6a) which divides the opening area (4) into a free and a covered zone. 6. Düse nach einem der Ansprüche 1 bis 4, dadurch gekenn­zeichnet, dass der Abdeckkörper (8) ein perforierter Kör­per ist.6. Nozzle according to one of claims 1 to 4, characterized in that the cover body (8) is a perforated body. 7. Düse nach einem der Ansprüche 1 bis 6, dadurch gekenn­zeichnet, dass der Abdeckkörper (6) mit Einstellelementen zusammenwirkt, mit denen er in vorgegebenen Positionen fixierbar ist.7. Nozzle according to one of claims 1 to 6, characterized in that the cover body (6) with adjusting elements interacts with which it can be fixed in predetermined positions. 8. Düse nach einem der Ansprüche 1 bis 7, dadurch gekenn­zeichnet, dass der Oeffnungsbereich (4) so gestaltet ist, dass die abzudeckende Fläche parallel zur Richtung ver­läuft, in der der Abdeckkörper (6) verschiebbar ist.8. Nozzle according to one of claims 1 to 7, characterized in that the opening area (4) is designed such that the surface to be covered runs parallel to the direction in which the cover body (6) is displaceable. 9. Düse nach einem der Ansprüche 1 bis 8, dadurch gekenn­zeichnet, dass Haltemittel (7) den Abdeckkörper (6) mit­tels Federkraft in Richtung Oeffnungsbereich (4) drücken.9. Nozzle according to one of claims 1 to 8, characterized in that holding means (7) press the cover body (6) by means of spring force in the direction of the opening area (4). 10. Düse nach einem der Ansprüche 1 bis 9, dadurch ge­kennzeichnet, dass die Oeffnung (10) einen Querschnitt aufweist, für den der kleinste Durchmesser mindestens das Zweifache des grössten Durchmessers beträgt.10. Nozzle according to one of claims 1 to 9, characterized in that the opening (10) has a cross section for which the smallest diameter is at least twice the largest diameter. 11. Luftwebmaschine mit mindestens einer Hilfsdüse (1) nach einem der Ansprüche 1 bis 10.11. Air weaving machine with at least one auxiliary nozzle (1) according to one of claims 1 to 10. 12. Luftwebmaschine nach Anspruch 11, dadurch gekenn­zeichnet, dass die Hilfsdüse (1) steuerbare Antriebsmit­tel zum Verändern des offenen Querschnitts des Oeff­nungsbereichs (4) aufweist.12. Air weaving machine according to claim 11, characterized in that the auxiliary nozzle (1) has controllable drive means for changing the open cross section of the opening area (4).
EP90810696A 1989-10-13 1990-09-14 Nozzle for air jet loom Withdrawn EP0423066A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3735/89 1989-10-13
CH373589 1989-10-13

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EP0423066A1 true EP0423066A1 (en) 1991-04-17

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JP (1) JPH03137249A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0516587A1 (en) * 1991-05-28 1992-12-02 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Auxiliary nozzle in an air jet loom
WO2004038077A1 (en) * 2002-10-23 2004-05-06 Picanol N.V., Naamloze Vennootschap Nozzle for supporting a weft thread in a weaving machine
WO2021216105A1 (en) * 2020-04-20 2021-10-28 Raines David Drew Web air threading system and methods of use

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5263658B2 (en) 2007-11-30 2013-08-14 東芝ライテック株式会社 Lighting device
JP5157836B2 (en) 2008-11-12 2013-03-06 東芝ライテック株式会社 lighting equipment
JP5708983B2 (en) 2010-03-29 2015-04-30 東芝ライテック株式会社 Lighting device
JP5747546B2 (en) 2010-03-29 2015-07-15 東芝ライテック株式会社 Lighting device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2212455A1 (en) * 1972-12-30 1974-07-26 Scheffel Walter
EP0239137A1 (en) * 1986-02-21 1987-09-30 Picanol N.V. Device for the insertion of weft threads into the shed of air jet looms, and adjustable blowers used thereby
DE3720492C1 (en) * 1987-06-20 1988-08-04 Dornier Gmbh Lindauer Air nozzle for weft-thread insertion in pneumatic weaving machines

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2212455A1 (en) * 1972-12-30 1974-07-26 Scheffel Walter
EP0239137A1 (en) * 1986-02-21 1987-09-30 Picanol N.V. Device for the insertion of weft threads into the shed of air jet looms, and adjustable blowers used thereby
DE3720492C1 (en) * 1987-06-20 1988-08-04 Dornier Gmbh Lindauer Air nozzle for weft-thread insertion in pneumatic weaving machines

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0516587A1 (en) * 1991-05-28 1992-12-02 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Auxiliary nozzle in an air jet loom
WO2004038077A1 (en) * 2002-10-23 2004-05-06 Picanol N.V., Naamloze Vennootschap Nozzle for supporting a weft thread in a weaving machine
BE1015155A3 (en) * 2002-10-23 2004-10-05 Picanol Nv SYRINGE nozzle for supporting a weft thread into a weaving machine.
WO2021216105A1 (en) * 2020-04-20 2021-10-28 Raines David Drew Web air threading system and methods of use
US11692311B2 (en) 2020-04-20 2023-07-04 David Drew Raines Web air threading system and methods of use

Also Published As

Publication number Publication date
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