EP0695821A1 - Air loom with selvedoe guide - Google Patents

Air loom with selvedoe guide Download PDF

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Publication number
EP0695821A1
EP0695821A1 EP95110331A EP95110331A EP0695821A1 EP 0695821 A1 EP0695821 A1 EP 0695821A1 EP 95110331 A EP95110331 A EP 95110331A EP 95110331 A EP95110331 A EP 95110331A EP 0695821 A1 EP0695821 A1 EP 0695821A1
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EP
European Patent Office
Prior art keywords
weft
hold
air
reed
weaving machine
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
EP95110331A
Other languages
German (de)
French (fr)
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EP0695821B1 (en
Inventor
Adnan Dr.-Ing. Wahhoud
Peter Czura
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Lindauer Dornier GmbH
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Lindauer Dornier GmbH
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Publication of EP0695821A1 publication Critical patent/EP0695821A1/en
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    • DTEXTILES; PAPER
    • D03WEAVING
    • D03DWOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00Details or constructional features not specially adapted for looms of a particular type
    • D03D49/60Construction or operation of slay
    • D03D49/62Reeds mounted on slay
    • 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
    • D03D47/27Drive or guide mechanisms for weft inserting
    • D03D47/277Guide mechanisms
    • D03D47/278Guide mechanisms for pneumatic looms
    • 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
    • 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
    • D03D47/40Forming selvedges
    • D03D47/48Forming selvedges by inserting cut end of weft in next shed, e.g. by tucking, by blowing

Definitions

  • the invention relates to an air weaving machine with edge hold-down device according to the preamble of claim 1.
  • the process of threading out the weft end is supported by the periodic shifting of the warp threads in the vertical direction against each other.
  • the technical training for weaving is meant.
  • the object of the invention is therefore to develop an air-jet weaving machine of the type mentioned at the outset in such a way that the inserted weft ends are reliably held in the inserted position and a defined insert edge is reached without protruding thread ends or fraying.
  • weft insertion channel in the reed is expanded at its entry and exit ends and that a hold-down device engages in each of these extensions.
  • This hold-down device ensures that the reinserted weft ends reliably do not come out in the edge area and that curling or loop formation of these ends is prevented.
  • the binding point is the point at which the rearmost point of the weft insertion channel is at the foremost position of the reed. It is not possible to extend the hold-down directly to the binding point, since in this case there would be contact between the reed and the hold-down, which is associated with damage.
  • the hold-down devices are essentially semicircular or L-shaped and engage with their front end, which runs essentially horizontally, in the foremost position of the reed on both sides in the weft insertion channel. This front end is then followed by a bent or bent section, with which the hold-down device is fastened.
  • the hold-down device is also possible to design the hold-down device as only a slightly bent sheet metal, so that the fastening of the hold-down device lies only insignificantly above the level of the table on which the finished fabric rests.
  • the hold-down device exerts a specific contact pressure via a spring or due to its own weight. But it is also possible to make the hold-down device resilient itself, or to attach it to a suitable force or actuating element. The contact pressure can then also be adjusted depending on the requirements.
  • the air-jet weaving machine essentially consists of a table 1 with a hold-down device 2 mounted thereon, against which a reed 3 can be pivoted in the direction of the arrow 17, 18.
  • 10 warp threads 5, 6 are fed from the right in the direction of the arrow to a warp which are moved in the direction of the arrow 11, 12 by a shedding device not shown in detail.
  • these warp threads define the shed 9.
  • a weft thread 7 is now shot into the shed 9 and, after crossing the fabric width, tied by the warp threads and separated on the entry side.
  • weft ends 8a are formed on each side of the fabric. These weft ends 8a are blown by means of air jets 22, see also FIG. 4a, into the following shed 9. the device shown in Figure 1 inserted.
  • Figure 1 shows the situation after repeated insertion of the weft ends 8a and a further transport of the fabric in the direction of arrow 10.
  • a new weft thread 7 is shot into the weft insertion channel 4 of the reed.
  • the weft thread is struck by the reed 3 in its foremost position 3a (FIG. 2) on the fabric 15, then tied off by the warp threads 5,6 and subsequently cut off.
  • the binding point 16 is also shown here.
  • the weft end 8 of the previous weft 7 is reliably incorporated.
  • the hold-down device 2 and the table 1 prevent the warp threads 5, 6 from performing a stroke at this point in the vertical direction and thus preventing the inserted thread ends from being unthreaded.
  • the reed pivots back in the direction of arrow 18 into its starting position.
  • the warp threads 5 are then moved in the direction of the arrow 12 into the previous position of the warp threads 6, while the warp threads 6 are displaced in the place of the previous warp threads 5.
  • a new shed 9 is formed, into which the weft ends of the weft thread 7 are inserted.
  • Figure 3 shows the front view of the reed 3. It can clearly be seen that the weft insertion channel 4 has an extension 13, 14 at its entry and exit ends. The shape and size of these extensions 13, 14 depend on the boundary conditions, in particular on the distance to which the weft thread ends are to be inserted in the fabric from the fabric edge.
  • the nose in the weft insertion channel 4 which can be seen in FIG. 2, reflects the original size of the weft insertion channel, which is kept unchanged in the middle of the reed in order to ensure reliable weft through of the weft thread 7.
  • Figure 3a shows a side view of the reed, where it can be seen that the upper part of the weft insertion channel is expanded at the two outer ends of the weft insertion channel in that the upper part of the reed tooth is withdrawn. A conically widening inlet opening is thus formed, which is only present in the upper region of the weft insertion channel. This leaves space for the arrangement of corresponding further facilities, such as a hold-down or the like is created.
  • Figures 4 and 4a show the difference without and with the arrangement of a hold-down in the area of the extension.
  • FIG. 4a it is also shown at the top left that there is a device for a pneumatic insert which inserts the weft end 8a.
  • This insert 20 directs compressed air jets 22 in the direction of the fabric edge to be formed in order to insert the weft end 8a.
  • FIG. 4 shows that without the use of a hold-down device 2, an insert edge is realized, in which the weft ends tend to unthread or form loop-like ends during fabric formation, as a result of which edge consolidation in the edge region is then no longer adequately guaranteed.
  • FIG. 4a shows the use of the hold-down device according to the invention, which ensures that the weft ends 8a are stretched clean and are just inserted into the fabric 15.

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

Abstract

Luftwebmaschine mit Kanteniederhalter, wobei der Schußfaden nach jedem Schußeintrag abgetrennt und die freien Schußfadenenden in das folgende Webfach eingelegt werden, wobei der Schußeintragskanal (4) im Webblatt (3,3a) an beiden Seiten des Webblattes (3,3a) erweitert ist und in diese Erweiterungen (13,14) je ein Niederhalter (2) eingreift. <IMAGE>Air weaving machine with edge hold-down device, the weft thread being separated after each weft insertion and the free weft thread ends being inserted into the following shed, the weft insertion channel (4) in the reed (3,3a) being widened on both sides of the reed (3,3a) and into this Extensions (13, 14) each engage a hold-down device (2). <IMAGE>

Description

Gegenstand der Erfindung ist eine Luftwebmaschine mit Kantenniederhalter nach dem Oberbegriff des Anspruches 1.The invention relates to an air weaving machine with edge hold-down device according to the preamble of claim 1.

Dabei ist bereits bekannt, daß bei Luftwebmaschinen die freien Schußfadenenden in das nachfolgende Webfach eingelegt werden. Dies ist beispielsweise in der EP 0 291 744 A2 gezeigt worden, bei der die freien Schußfadenenden mit Hilfe einer Düse wieder eingelegt werden. Auch die EP 0 431 484 A1 und die EP 0 534 429 A1 zeigen entsprechende Vorrichtungen.It is already known that the free weft ends are inserted into the subsequent shed in air weaving machines. This has been shown, for example, in EP 0 291 744 A2, in which the free weft ends are reinserted using a nozzle. EP 0 431 484 A1 and EP 0 534 429 A1 also show corresponding devices.

Nachteilig bei all diesen Lösungen ist, daß lediglich ein Einlegen des Schußfadenendes in das folgende Webfach erfolgt, aber kein Fixieren dieses Schußfadenendes bei geringen Schußdichten, wie z.B. 1,5 - 0,5 Schußfaden/Zentimeter vorgesehen ist. Es kommt daher dazu, daß die Schußfadenenden sich nach dem Einlegevorgang durch das Fachbilden ausfädeln und gekräuselt bzw. schlingenartig eingebunden werden. Dies führt dazu, daß die zurückgeführten Enden des Schußfadens dann nicht zuverlässig an der Gewebekante gehalten werden, sondern duch Belastung des Gewebes und aufgrund des in Schlingen eingelegten Schußfadenendes dieses teilweise wieder aus dem Gewebe herausgezogen wird. Damit ist keine glatte, genügend verfestigte Gewebekante gewährleistet.A disadvantage of all these solutions is that only the end of the weft thread is inserted into the following shed, but no fixation of this end of the weft thread at low weft densities, e.g. 1.5 - 0.5 weft / centimeter is provided. It is therefore the case that the weft ends are threaded out by the shedding after the insertion process and are crimped or tied in a loop. This leads to the fact that the returned ends of the weft thread are then not reliably held on the fabric edge, but rather are pulled out of the fabric again due to the load on the fabric and due to the weft thread end inserted in loops. This does not guarantee a smooth, sufficiently solidified fabric edge.

Unterstützt wird der Vorgang des Ausfädelns des Schußfadenendes durch das periodische Verschieben der Kettfäden in vertikaler Richtung gegeneinander. Hier ist die Fachbildung zum Weben gemeint.The process of threading out the weft end is supported by the periodic shifting of the warp threads in the vertical direction against each other. Here the technical training for weaving is meant.

Aufgabe der Erfindung ist es daher, eine Luftwebmaschine der eingangs genannten Art so weiterzubilden, daß die eingelegten Schußfadenenden zuverlässig in der eingelegten Position gehalten werden und damit eine definierte Einlegekante ohne überstehende Fadenenden oder Ausfransungen erreicht wird.The object of the invention is therefore to develop an air-jet weaving machine of the type mentioned at the outset in such a way that the inserted weft ends are reliably held in the inserted position and a defined insert edge is reached without protruding thread ends or fraying.

Erfindungsgemäß wird diese Aufgabe durch die technische Lehre des kennzeichnenden Teils von Anspruch 1 gelöst.According to the invention, this object is achieved by the technical teaching of the characterizing part of claim 1.

Dabei ist wesentlich, daß der Schußeintragskanal im Webblatt an seinem Ein- und Austrittsende erweitert ist und in diese Erweiterung je ein Niederhalter eingreift.It is essential that the weft insertion channel in the reed is expanded at its entry and exit ends and that a hold-down device engages in each of these extensions.

Durch diese Niederhalter wird gewährleistet, daß im Kantenbereich die wieder eingelegten Schußfadenenden zuverlässig nicht ausfädeln und ein Kräuseln oder eine Schlingenbildung dieser Enden verhindert wird.This hold-down device ensures that the reinserted weft ends reliably do not come out in the edge area and that curling or loop formation of these ends is prevented.

Dabei wird es bevorzugt, wenn die Niederhalter sich bis dicht an den Bindepunkt erstrecken. Der Bindepunkt ist der Punkt, an dem sich der hinterste Punkt des Schußeintragskanals bei der vordersten Position des Webblattes befindet. Eine Erstreckung der Niederhalter bis direkt an den Bindepunkt heran ist nicht möglich, da es in diesem Fall zu einem Kontakt zwischen dem Webblatt und dem Niederhalter kommen würde, was mit Beschädigungen verbunden ist.It is preferred if the hold-downs extend close to the binding point. The binding point is the point at which the rearmost point of the weft insertion channel is at the foremost position of the reed. It is not possible to extend the hold-down directly to the binding point, since in this case there would be contact between the reed and the hold-down, which is associated with damage.

Die Niederhalter sind dabei im wesentlichen halbkreisförmig oder L-förmig ausgebildet und greifen mit ihrem vorderen Ende, das im wesentlichen horizontal verläuft, in der vordersten Position des Webblattes zu beiden Seiten in den Schußeintragskanal ein. An dieses vordere Ende schließt sich danach ein gebogener oder abgekanteter Abschnitt an, mit dem der Niederhalter befestigt ist.The hold-down devices are essentially semicircular or L-shaped and engage with their front end, which runs essentially horizontally, in the foremost position of the reed on both sides in the weft insertion channel. This front end is then followed by a bent or bent section, with which the hold-down device is fastened.

Es ist allerdings ebenfalls möglich, den Niederhalter als nur leicht gebogenes Blech auszubilden, so daß die Befestigung des Niederhalters nur unwesentlich über der Ebene des Tisches liegt, auf dem das fertige Gewebe aufliegt.However, it is also possible to design the hold-down device as only a slightly bent sheet metal, so that the fastening of the hold-down device lies only insignificantly above the level of the table on which the finished fabric rests.

Zur Erreichung der nötigen Anpreßkraft ist vorgesehen, daß der Niederhalter über eine Feder oder aufgrund seines eigenen Gewichtes eine bestimmte Anpreßkraft ausübt. Es ist aber ebenfalls möglich, den Niederhalter selbst federnd auszubilden, oder ihn an einem geeigneten Kraft- oder Stellelement zu befestigen. Damit kann dann auch die Anpreßkraft in Abhängigkeit von den Anforderungen eingestellt werden.To achieve the necessary contact pressure, it is provided that the hold-down device exerts a specific contact pressure via a spring or due to its own weight. But it is also possible to make the hold-down device resilient itself, or to attach it to a suitable force or actuating element. The contact pressure can then also be adjusted depending on the requirements.

Um ein schnelles Umrüsten der Maschine auf verschiedene Gewebe bzw. eine rasche Anpassung an unterschiedliche Bedingungen zu erreichen, ist es in einer Weiterbildung der Erfindung vorgesehen, daß ein automatischer Wechsel zwischen mehreren Niederhaltertypen möglich ist.In order to achieve a quick changeover of the machine to different fabrics or a rapid adaptation to different conditions, it is provided in a development of the invention that an automatic change between several hold-down types is possible.

Im folgenden wird die Erfindung anhand von lediglich einen Ausführungsweg darstellende Zeichnungen näher erläutert. Hierbei gehen aus den Zeichnungen und ihrer Beschreibung weitere erfindungswesentliche Merkmale und Vorteil der Erfindung hervor.The invention is explained in more detail below with the aid of drawings which illustrate only one embodiment. Further features and advantages of the invention which are essential to the invention are evident from the drawings and their description.

Dabei zeigt:

Figur 1 :
eine schematische Seitenansicht des Webvorgangs in einer ersten Webposition;
Figur 2 :
eine Ansicht gem. Figur 1 in einer zweiten Webposition;
Figur 3 :
ein Webblatt;
Figur 3a :
ein Webblatt in der Seitenansicht;
Figur 4 :
Draufsicht auf das Gewebe mit eingelegter Kante ohne Niederhalter;
Figur 4a :
Draufsicht auf die gleiche Darstellung wie Figur 4, aber mit Benützung eines Niederhalters.
It shows:
Figure 1:
a schematic side view of the weaving process in a first weaving position;
Figure 2:
a view acc. Figure 1 in a second weaving position;
Figure 3:
a reed;
Figure 3a:
a reed in side view;
Figure 4:
Top view of the fabric with an inserted edge without hold-down device;
Figure 4a:
Top view of the same representation as Figure 4, but with the use of a hold-down.

Gemäß Figur 1 besteht die erfindungsgemäße Luftwebmaschine neben nicht näher dargestellten Bauteilen wie Düsen oder Stellelementen im wesentlichen aus einem Tisch 1 mit einem darüber angebrachten Niederhalter 2, gegenüber denen ein Webblatt 3 in Pfeilrichtung 17,18 verschwenkbar ist. Dabei werden von rechts in Pfeilrichtung 10 Kettfäden 5,6 einer Webkette zugeführt, die durch nicht näher dargestellte Fachbilde-Einrichtung in Pfeilrichtung 11,12 bewegt werden.According to FIG. 1, in addition to components, such as nozzles or adjusting elements, which are not shown in more detail, the air-jet weaving machine according to the invention essentially consists of a table 1 with a hold-down device 2 mounted thereon, against which a reed 3 can be pivoted in the direction of the arrow 17, 18. In this case, 10 warp threads 5, 6 are fed from the right in the direction of the arrow to a warp which are moved in the direction of the arrow 11, 12 by a shedding device not shown in detail.

Diese Kettfäden definieren zusammen mit dem Webblatt 3 das Webfach 9.Together with the reed 3, these warp threads define the shed 9.

Zur Bildung des Gewebes 15 wird nun in das Webfach 9 ein Schußfaden 7 eingeschossen und nach Überqueren der Gewebebreite durch die Kettfäden abgebunden und auf der Eintragsseite abgetrennt. Dadurch bilden sich auf jeder Seite des Gewebes Schußfadenenden 8a. Diese Schußfadenenden 8a werden mittels Luftstrahlen 22, siehe auch Figur 4a, in das folgende Webfach 9 gem. der dargestellten Vorrichtung in Figur 1 eingelegt.To form the fabric 15, a weft thread 7 is now shot into the shed 9 and, after crossing the fabric width, tied by the warp threads and separated on the entry side. As a result, weft ends 8a are formed on each side of the fabric. These weft ends 8a are blown by means of air jets 22, see also FIG. 4a, into the following shed 9. the device shown in Figure 1 inserted.

Figur 1 zeigt die Situation nach mehrmaligen Einlegen der Schußfadenenden 8a und einem Weitertransport des Gewebes in Pfeilrichtung 10.Figure 1 shows the situation after repeated insertion of the weft ends 8a and a further transport of the fabric in the direction of arrow 10.

Nach dem Einlegen des Schußfadenendes 8a in das Webfach 9 wird das Gewebe 15 in Pfeilrichtung 10 weitertransportiert, so daß das Schußfadenende 8a in den Bereich zwischen Niederhalter 2 und Tisch 1 transportiert wird. Diese Stellung des Gewebes ist in Figur 2 näher dargestellt.After inserting the weft end 8a into the shed 9, the fabric 15 is transported further in the direction of the arrow 10, so that the weft end 8a is transported into the area between the hold-down device 2 and table 1. This position of the fabric is shown in more detail in Figure 2.

Kurz vor dem Ende dieses Transportvorganges oder nach dem Abschluß desselben wird ein neuer Schußfaden 7 in den Schußeintragskanal 4 des Webblattes eingeschossen. Der Schußfaden wird vom Webblatt 3 in seiner vordersten Position 3a (Fig. 2) an das Gewebe 15 angeschlagen, danach von den Kettfäden 5,6 abgebunden und nachfolgend abgeschnitten.Shortly before the end of this transport process or after the completion of the same, a new weft thread 7 is shot into the weft insertion channel 4 of the reed. The weft thread is struck by the reed 3 in its foremost position 3a (FIG. 2) on the fabric 15, then tied off by the warp threads 5,6 and subsequently cut off.

Hier ist auch der Bindepunkt 16 dargestellt.The binding point 16 is also shown here.

Dabei ist deutlich zu erkennen, daß das Schußfadenende 8 des vorherigen Schußfadens 7 zuverlässig eingebunden ist. Der Niederhalter 2 und der Tisch 1 verhindert, daß die Kettfäden 5,6 an dieser Stelle in der vertikalen Richtung einen Hub ausführen und damit ein Ausfädeln der eingelegten Fadenenden unterbunden bleibt.It can be clearly seen that the weft end 8 of the previous weft 7 is reliably incorporated. The hold-down device 2 and the table 1 prevent the warp threads 5, 6 from performing a stroke at this point in the vertical direction and thus preventing the inserted thread ends from being unthreaded.

Danach schwenkt das Webblatt wieder zurück in Pfeilrichtung 18 in seine Ausgangsstellung. Daraufhin werden die Kettfäden 5 in Pfeilrichtung 12 in die bisherige Stellung der Kettfäden 6 bewegt, während die Kettfäden 6 an die Stelle der bisherigen Kettfäden 5 versetzt werden. Durch dieses gegenläufige Verschieben der Kettfäden wird ein neues Webfach 9 gebildet, in das die Schußfadenenden des Schußfadens 7 eingelegt werden.Then the reed pivots back in the direction of arrow 18 into its starting position. The warp threads 5 are then moved in the direction of the arrow 12 into the previous position of the warp threads 6, while the warp threads 6 are displaced in the place of the previous warp threads 5. By moving the warp threads in opposite directions, a new shed 9 is formed, into which the weft ends of the weft thread 7 are inserted.

Dieses entspricht dann wieder der Darstellung nach Figur 1. Der Vorgang wiederholt sich solange bis die gewünschte Gewebelänge erreicht ist.This then corresponds again to the illustration according to FIG. 1. The process is repeated until the desired fabric length is reached.

Figur 3 zeigt die Vorderansicht des Webblattes 3. Es ist deutlich zu erkennen, daß der Schußeintragskanal 4 an seinem Ein- und Austrittsende eine Erweiterung 13,14 aufweist. Form und Größe dieser Erweiterungen 13,14 sind abhängig von den Randbedingungen, insbesondere davon, bis zu welcher Entfernung ab Gewebekante die Schußfadenenden in dem Gewebe eingelegt sein sollen.Figure 3 shows the front view of the reed 3. It can clearly be seen that the weft insertion channel 4 has an extension 13, 14 at its entry and exit ends. The shape and size of these extensions 13, 14 depend on the boundary conditions, in particular on the distance to which the weft thread ends are to be inserted in the fabric from the fabric edge.

Die in Figur 2 zu erkennende Nase im Schußeintragskanal 4 gibt die ursprüngliche Größe des Schußeintragskanales wieder, die in der Mitte des Webblattes unverändert beibehalten wird, um ein zuverlässiges Durchschießen des Schußfadens 7 zu gewährleisten.The nose in the weft insertion channel 4, which can be seen in FIG. 2, reflects the original size of the weft insertion channel, which is kept unchanged in the middle of the reed in order to ensure reliable weft through of the weft thread 7.

Mit der Erfindung ist es erstmals möglich, auch bei geringer Schußdichte, die eingelegten Schußfadenenden zuverlässig im Gewebe zu fixieren, so daß eine glatte, gut ausgebildete Einlegekante gewährleistet ist.With the invention it is possible for the first time, even with low weft density, the inserted weft ends reliably in Fix tissue so that a smooth, well-formed insert edge is guaranteed.

Figur 3a zeigt eine Seitenansicht des Webblattes, wo erkennbar ist, daß der obere Teil des Schußeintragskanals an den beiden äußeren Enden des Schußeintragskanals jeweils erweitert ist, indem der obere Teil des Webblattzahnes zurückgenommen ist. Es bildet sich somit eine konisch sich erweiternde Einlauföffnung, die nur im oberen Bereich des Schußeintragskanals vorhanden ist. Damit wird Raum für die Anordnung von entsprechenden weiteren Einrichtungen, wie z.B. ein Niederhalter oder dergleichen geschaffen.Figure 3a shows a side view of the reed, where it can be seen that the upper part of the weft insertion channel is expanded at the two outer ends of the weft insertion channel in that the upper part of the reed tooth is withdrawn. A conically widening inlet opening is thus formed, which is only present in the upper region of the weft insertion channel. This leaves space for the arrangement of corresponding further facilities, such as a hold-down or the like is created.

Die Erweiterung 14 in Figur 3a macht dies deutlich.The extension 14 in Figure 3a makes this clear.

Ferner ist in Figur 1 und 2 dargestellt, daß eine Stafettendüse 19 vorhanden ist, die einen Luftstrahl für den Schußeintrag abgibt.It is also shown in Figures 1 and 2 that a relay nozzle 19 is present which emits an air jet for the weft insertion.

Die Figuren 4 und 4a zeigen den Unterschied ohne und mit Anordnung eines Niederhalters im Bereich der Erweiterung.Figures 4 and 4a show the difference without and with the arrangement of a hold-down in the area of the extension.

In Figur 4a ist ferner oben links noch dargestellt, daß eine Einrichtung für einen pneumatischen Einleger vorhanden ist, welcher das Schußfadenende 8a einlegt.In FIG. 4a it is also shown at the top left that there is a device for a pneumatic insert which inserts the weft end 8a.

Dieser Einleger 20 richtet Druckluftstrahlen 22 in Richtung auf die zu bildende Gewebekante, um das Schußfadenende 8a, einzulegen.This insert 20 directs compressed air jets 22 in the direction of the fabric edge to be formed in order to insert the weft end 8a.

Die Figur 4 zeigt, daß ohne Verwendung eines Niederhalters 2 eine Einlegekante verwirklicht wird, bei welcher die Schußfadenenden bei der Gewebebildung zur Ausfädelung neigen bzw. schlingenartige Enden bilden, wodurch dann die Kantenverfestigung im Kantenbereich nicht mehr ausreichend gewährleistet ist.FIG. 4 shows that without the use of a hold-down device 2, an insert edge is realized, in which the weft ends tend to unthread or form loop-like ends during fabric formation, as a result of which edge consolidation in the edge region is then no longer adequately guaranteed.

Die Figur 4a zeigt hingegen die Verwendung des erfindungsgemäßen Niederhalters, der dafür sorgt, daß die Schußfadenenden 8a sauber gestreckt und gerade in dem Gewebe 15 eingelegt sind.FIG. 4a, on the other hand, shows the use of the hold-down device according to the invention, which ensures that the weft ends 8a are stretched clean and are just inserted into the fabric 15.

ZEICHNUNGSLEGENDEDRAWING LEGEND

11
Tischtable
22nd
NiederhalterHold-down
33rd
WebblattReed
3a3a
WebblattReed
44th
SchußeintragskanalWeft insertion channel
55
KettfadenWarp thread
66
KettfadenWarp thread
77
SchußfadenWeft
88th
eingebundener Schußfadenintegrated weft
8a8a
eingelegtes Schußfadenendeinserted weft end
99
WebfachShed
1010th
PfeilrichtungArrow direction
1111
PfeilrichtungArrow direction
1212th
PfeilrichtungArrow direction
1313
Erweiterungextension
1414
Erweiterungextension
1515
Gewebetissue
1616
BindepunktTie point
1717th
PfeilrichtungArrow direction
1818th
PfeilrichtungArrow direction
1919th
StafettendüseRelay nozzle
2020th
Einrichtung für pneumatische EinlegerDevice for pneumatic inserts
2121
DrucklufteinspeisungCompressed air feed
2222
Druckluftstrahlen zum Einlegen der FadenendenCompressed air jets for inserting the thread ends

Claims (6)

Luftwebmaschine bei der der Schußfaden nach jedem Schußeintrag in den Eintragskanal (4) des Webblattes abgetrennt und die freien Schußfadenenden in das folgende Webfach (9) eingelegt werden, dadurch kennzeichnet, daß der Eintragskanal (4) an seinem Ein- Austrittsende erweitert ist und in diese Erweiterungen (13,14) je ein Niederhalter (2) eingreift.Air weaving machine in which the weft thread is separated after each weft entry into the entry channel (4) of the reed and the free ends of the weft thread are inserted into the following shed (9), characterized in that the entry channel (4) is expanded at its entry and exit ends Extensions (13,14) engages a hold-down device (2). Luftwebmaschine nach Anspruch 1, dadurch gekennzeichnet, daß die Niederhalter (2) sich dicht bis an den Bindepunkt (16) heran erstrecken.Air-jet weaving machine according to claim 1, characterized in that the hold-down devices (2) extend close to the binding point (16). Luftwebmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Niederhalter (2) im wesentlichen halbkreisförmig oder L-förmig ausgebildet sind.Air-jet weaving machine according to claim 1 or 2, characterized in that the hold-down devices (2) are essentially semicircular or L-shaped. Luftwebmaschine nach einem der Ansprüche 1 - 3, dadurch gekennzeichnet, daß das Andrücken der Niederhalter über eine Feder, mittels Schwerkraft oder über ein Kraft- oder Stellelement erfolgt oder die Niederhalter (2) selbst federnd ausgebildet sind.Air-jet weaving machine according to one of Claims 1-3, characterized in that the hold-down devices are pressed on by means of a spring, by means of gravity or by means of a force or actuating element, or the hold-down devices (2) are themselves spring-loaded. Luftwebmaschine nach einem der Ansprüche 1 - 4, dadurch gekennzeichnet, daß ein automatischer Wechsel zwischen mehreren Niederhaltern vorgesehen ist.Air-jet weaving machine according to one of claims 1-4, characterized in that an automatic change between several hold-down devices is provided. Luftwebmaschine nach einem der Ansprüche 1 - 5, dadurch gekennzeichnet, daß die Erweiterung jeweils einseitig am oberen Teil des Schußeintragskanals am Webblatt (3,3a) ausgebildet ist.Air-jet weaving machine according to one of claims 1-5, characterized in that the extension is formed on one side on the upper part of the weft insertion channel on the reed (3,3a).
EP95110331A 1994-07-09 1995-07-03 Air loom with selvedoe guide Expired - Lifetime EP0695821B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4424271A DE4424271C1 (en) 1994-07-09 1994-07-09 Air jet loom weft insertion channel
DE4424271 1994-07-09

Publications (2)

Publication Number Publication Date
EP0695821A1 true EP0695821A1 (en) 1996-02-07
EP0695821B1 EP0695821B1 (en) 1998-09-02

Family

ID=6522765

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Country Status (4)

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US (1) US5570726A (en)
EP (1) EP0695821B1 (en)
JP (1) JP2925983B2 (en)
DE (2) DE4424271C1 (en)

Families Citing this family (7)

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Publication number Priority date Publication date Assignee Title
DE19545840C1 (en) * 1995-12-08 1997-01-23 Dornier Gmbh Lindauer Weaving reed for air weaving machine
DE19917953C1 (en) * 1999-04-21 2001-01-25 Dornier Gmbh Lindauer Pneumatically operated last layer for weaving machines
JP2004068164A (en) * 2002-08-01 2004-03-04 Tsudakoma Corp Reed for weaving
JP2004197280A (en) * 2002-12-20 2004-07-15 Tsudakoma Corp Reeds for weaving
US7748414B2 (en) * 2006-12-12 2010-07-06 Itema (Switzerland) Ltd Method and apparatus for the insertion of weft threads
AU2009250074A1 (en) 2008-05-23 2009-11-26 Aktiebolaget Electrolux Cold appliance
DE102015217356B3 (en) * 2015-09-10 2016-10-20 Lindauer Dornier Gesellschaft Mit Beschränkter Haftung Weaving machine with a device and method for holding, feeding and entering weft threads in a shed

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US3621886A (en) * 1969-02-04 1971-11-23 Hubert Peter Van Mullekom Temple for use in a weaving loom
FR2348297A1 (en) * 1976-04-13 1977-11-10 Rueti Ag Maschf NOZZLE Loom
EP0083905A1 (en) * 1982-01-13 1983-07-20 GebràœDer Sulzer Aktiengesellschaft Terry loom having an expander device between the reed and the breast beam
EP0291744A2 (en) 1987-05-19 1988-11-23 Zvs Vyzkumnevyvojovy Ustav Koncernova Ucelova Organizace Device to form fabric tuck-in selvedges in weaving machines
EP0318802A1 (en) * 1987-12-01 1989-06-07 Lindauer Dornier Gesellschaft M.B.H Weft insertion device for pneumatic looms with at least two bundled nozzles
EP0336408A2 (en) * 1988-04-07 1989-10-11 Lindauer Dornier Gesellschaft M.B.H Air-jet loom with expander table
JPH02112442A (en) * 1988-10-15 1990-04-25 Nissan Motor Co Ltd Weft inserting apparatus in air jet loom
EP0431484A1 (en) 1989-12-06 1991-06-12 Klöcker-Entwicklungs-GmbH Device for forming a tuck-in selvedge
EP0534429A1 (en) 1991-09-23 1993-03-31 SOMET SOCIETA' MECCANICA TESSILE S.p.A. Method to form a tucked-in selvedge in shuttleless, particularly air looms, and device to carry out said method

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JPS5331860A (en) * 1976-09-03 1978-03-25 Nissan Motor Air guide for airrjet loom
DE3374424D1 (en) * 1982-12-22 1987-12-17 Nissan Motor Weft picking device of air jet type weaving loom

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3621886A (en) * 1969-02-04 1971-11-23 Hubert Peter Van Mullekom Temple for use in a weaving loom
FR2348297A1 (en) * 1976-04-13 1977-11-10 Rueti Ag Maschf NOZZLE Loom
EP0083905A1 (en) * 1982-01-13 1983-07-20 GebràœDer Sulzer Aktiengesellschaft Terry loom having an expander device between the reed and the breast beam
EP0291744A2 (en) 1987-05-19 1988-11-23 Zvs Vyzkumnevyvojovy Ustav Koncernova Ucelova Organizace Device to form fabric tuck-in selvedges in weaving machines
EP0318802A1 (en) * 1987-12-01 1989-06-07 Lindauer Dornier Gesellschaft M.B.H Weft insertion device for pneumatic looms with at least two bundled nozzles
EP0336408A2 (en) * 1988-04-07 1989-10-11 Lindauer Dornier Gesellschaft M.B.H Air-jet loom with expander table
JPH02112442A (en) * 1988-10-15 1990-04-25 Nissan Motor Co Ltd Weft inserting apparatus in air jet loom
EP0431484A1 (en) 1989-12-06 1991-06-12 Klöcker-Entwicklungs-GmbH Device for forming a tuck-in selvedge
EP0534429A1 (en) 1991-09-23 1993-03-31 SOMET SOCIETA' MECCANICA TESSILE S.p.A. Method to form a tucked-in selvedge in shuttleless, particularly air looms, and device to carry out said method

Non-Patent Citations (1)

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Title
PATENT ABSTRACTS OF JAPAN vol. 14, no. 318 (C - 0738) 9 July 1990 (1990-07-09) *

Also Published As

Publication number Publication date
DE4424271C1 (en) 1995-06-29
JP2925983B2 (en) 1999-07-28
JPH0860494A (en) 1996-03-05
US5570726A (en) 1996-11-05
DE59503421D1 (en) 1998-10-08
EP0695821B1 (en) 1998-09-02

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