EP0318802B1 - Système d'insertion de la trame pour machines à tisser pneumatiques avec au moins deux tuyères réunies en faisceau - Google Patents

Système d'insertion de la trame pour machines à tisser pneumatiques avec au moins deux tuyères réunies en faisceau Download PDF

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Publication number
EP0318802B1
EP0318802B1 EP88119391A EP88119391A EP0318802B1 EP 0318802 B1 EP0318802 B1 EP 0318802B1 EP 88119391 A EP88119391 A EP 88119391A EP 88119391 A EP88119391 A EP 88119391A EP 0318802 B1 EP0318802 B1 EP 0318802B1
Authority
EP
European Patent Office
Prior art keywords
reed
woof
guide channel
alignment aid
nozzles
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
EP88119391A
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German (de)
English (en)
Other versions
EP0318802A1 (fr
Inventor
Adnan Dr.-Ing. Wahhoud
Rudolf Riezler
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.)
Lindauer Dornier GmbH
Original Assignee
Lindauer Dornier GmbH
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 Lindauer Dornier GmbH filed Critical Lindauer Dornier GmbH
Publication of EP0318802A1 publication Critical patent/EP0318802A1/fr
Application granted granted Critical
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Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/60—Construction or operation of slay
    • D03D49/62—Reeds mounted on slay
    • 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
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/277—Guide mechanisms
    • D03D47/278—Guide mechanisms for pneumatic looms
    • 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
    • D03D47/3033—Controlling the air supply
    • D03D47/3046—Weft yarn selection

Definitions

  • the invention relates to a weft insertion device for pneumatic weaving machines with at least two blowing nozzles combined to form a bundle according to the preamble of claim 1.
  • a separate weft insertion nozzle is provided for multicolored weaving for each individual color or for each special weft thread.
  • the entry nozzles for the different colors are usually combined into a bundle. It is provided that the mixing tubes of the individual nozzles all end at the same distance from the shed.
  • Pneumatic weaving machines also typically use devices to form guide channels for the weft thread.
  • a reed is provided with profiled rivet teeth, the guide channel being formed between a row of projecting profile noses of the reed at the top and a row at the bottom.
  • the available cross-section of the guide channels is comparatively small, in order on the one hand to achieve a clean guidance of the weft thread to be inserted and on the other hand to keep the consumption of entry medium low.
  • the weft should always run at the cheapest and above all in the same place in the shed or in the guide channel. In multi-colored weaving machines, in which several entry nozzles are bundled, but this requirement cannot be met without further ado.
  • the nozzles were slidably or revolver-like rotatably arranged so that the main insertion nozzle assigned to the selected weft thread is brought into the most favorable position and is exchanged for the nozzle previously located there.
  • this solution requires a complicated and expensive structure that is sensitive and prone to failure. Even if only a few individual nozzles are combined into a compact bundle, the available cross section of the guide channel is often not sufficient to keep the bundle of nozzles stationary, because the flows emanating from the individual nozzles run at different and sometimes less favorable places in the Guide channel. In many cases the thread end hits the edges at the edge of the guide channel when the weft is inserted.
  • EP patent application 1 84 435 describes an arrangement for weft insertion in multi-colored weaving.
  • a bundle of stationary weft insertion nozzles for the different colors is provided there, a flow body being arranged in the center of this bundle, the elongated shape of which only increases in the direction of flow and then has a decreasing cross-section.
  • a flow forms on the flow body, which follows approximately the shape of the body and thus also deflects the weft thread and brings it approximately into the axis running through the center of the bundle.
  • a weft thread to be entered should always get into the same position within the guide channel or within the shed, regardless of which nozzle of the bundle it is inserted into.
  • the cross section of the guide channel can remain relatively narrow.
  • the disadvantage of this arrangement is that the extent of the flow deflection is dependent on the flow velocity and thus on the pressure of the fluid available.
  • the flow body has to be relatively large, but the effect achieved is not so strong that the required deflection angles for the weft thread in multi-colored weaving are achieved with a larger bundle of nozzles.
  • the shape of the central flow body plays an important role and different types of threads react in their course to different degrees.
  • a special device is provided here in order to bring the thread to be inserted cleanly into a guide channel on the reed from several blow nozzles combined into a bundle.
  • the bundle of blowing nozzles is attached to the sley and is pivoted with it. The mutual position of the individual nozzles in the bundle remains unchanged.
  • the guide channel is formed by an upper and a lower row of projecting lugs on the reed teeth of the reed.
  • the special device referred to as alignment aid, is arranged between the guide channel of the reed and the blow nozzles.
  • the funnel opening facing the blow nozzles in the Diameter is at least equal to the total diameter of the blow nozzle bundle and its outlet opening facing the guide channel corresponds approximately in diameter to the cross-sectional width of the U-shaped guide channel.
  • Blowing nozzle and alignment aid are attached to the reed beam and are therefore pivoted together with the reed.
  • the alignment aid centers the thread entry into the guide channel for all blow nozzles of the bundle. After the respective thread has been inserted, the weft thread is cut off at the moment the blade is struck between the reed and the alignment aid or between the end of the blowing nozzles and the alignment aid.
  • the alignment aid there must be a certain distance from the adjoining component, be it a blowing nozzle or a reed, in order to create space for the component which cuts and possibly clamps the weft thread.
  • the disadvantage of this arrangement is that the weft waste increases because of the additional distances.
  • the bundle of blowing nozzles is arranged in a fixed position and only the alignment aid is pivoted together with the reed, a weft insertion can only take place if the blowing nozzles, funnel-shaped alignment aid and guide channel are aligned. The time available for the shot entry is greatly reduced.
  • the object of the invention is to avoid these disadvantages and to obtain longer weft insertion times per machine revolution, and to keep the weft thread waste to a minimum.
  • the characterizing features of the invention specified in claim 1 serve.
  • the main entry nozzles ie all the nozzles that capture the thread outside the shed and transport it into the shed, are used as blowing nozzles different types of designation.
  • the invention can be used with all such blowing nozzles, regardless of whether or not further so-called relay nozzles arranged along the shed are provided for the further transport of the weft thread.
  • the invention has the advantage that the weft thread waste is not only reduced by avoiding gaps laterally from the alignment aid, but also that any damage to the weft thread scissors is prevented with certainty.
  • the funnel-shaped bore of the alignment aid as an elongated slot, it is possible, despite the stationary arrangement of the alignment aid, to carry out the weft thread insertion also in part during the pivoting movement of the reed. A considerable gain in the time available for the weft insertion is thereby achieved and the machine rotation angle available for this is considerably increased. Because the slot of the alignment aid is open towards the stop side, the registered weft thread can be struck without difficulty.
  • a thread guide bracket can also be provided, which extends from the alignment aid to the weft scissors and guides the thread safely to the interface or to the attachment point.
  • the depth of the bore in the alignment aid ie the thickness of the body of this device, can be reduced if part of the funnel-shaped opening is placed in the beginning of the guide channel itself and the beginning of the guide channel undergoes a corresponding funnel-like widening.
  • the funnel-shaped part of the guide channel is removed from the actual reed, and the relevant reed teeth are combined to form a separate auxiliary reed directly adjacent to the body of the alignment aid.
  • FIG. 1 The essential parts of the invention are shown in perspective.
  • a reed 3 is shown in detail, which consists of profiled reed teeth 11.
  • the rivet teeth 11 have projecting lugs in a manner known per se, which form a guide channel 4 between them for the weft thread to be inserted.
  • the ends of relay nozzles 5 are also indicated, which are intended to transport and support the weft thread in the guide channel 4.
  • the arrangement of the relay nozzles 5 is not essential for the invention and therefore need not be described further.
  • the position of the shed is indicated by a pair of warp threads 6 which are guided by the rivet teeth 11.
  • blowing nozzles 1 In the left part of the figure, a bundle of blowing nozzles 1 is drawn in as an extension of the guide channel 4. A bundle of four blowing nozzles is assumed here, three of which can be seen in the perspective view. The width of the guide channel 4 is smaller than the diameter of the blow nozzle bundle 1.
  • blow nozzles here means all types of weft insertion nozzles which are arranged as main nozzles outside the shed and which insert the weft thread into the guide channel.
  • the stop movement of the reed is shown by two double arrows A and at the same time it is shown that the bundle of blowing nozzles 1 performs the stop movement together with the reed.
  • the end of the stop movement A lies, as can be seen from the lower right part of the figure, on the stop edge of the finished fabric 7.
  • a pair of scissors 8 is arranged on the left edge of the fabric 7, the control of which is not shown and described, since it is of a type known per se.
  • the scissors 8 are located close to the lateral edge of the fabric 7 to produce as little weft waste as possible.
  • the distance between the end of the blowing nozzles 1 and the beginning of the reed 3 in its rest position is filled by a block-like alignment aid 2.
  • Alignment aid 2 connects tightly to the two components mentioned above, blowing nozzles on the one hand and Riet on the other. Furthermore, as FIG. 1 clearly shows, the alignment aid 2 is arranged in a stationary manner.
  • the block of alignment aid 2 is provided with a funnel-shaped opening which runs from the end of the blowing nozzles 1 to the guide channel 4.
  • the width of the opening corresponds essentially to the diameter of the bundle of blowing nozzles 1 and narrows on the opposite side of the block to approximately the diameter of the guide channel 4.
  • the opening of the alignment aid 2 is designed here as a slot 2c which extends in the direction of the weft scissors 8.
  • the length of the slot essentially corresponds to the path that the reed 3 or the guide channel 4 traverses during its stop movement during the actual weft insertion.
  • the slot 2c is open to the scissors 8.
  • the opening is designated 2d and through it the weft thread can emerge from the alignment aid when struck and can be inserted into the scissors 8.
  • Fig. 1 shows a further development of the invention in that a thread guide bracket 9 is provided on the block of the alignment aid 2 as an extension, which leads to the weft scissors 8 and can carry the scissors or parts thereof.
  • a thread guide bracket 9 is shown only in the upper part of the alignment aid 2, but such a bracket can also be provided in the lower part.
  • the thread guide bracket 9 prevents the inserted thread from jumping out, as is e.g. prevented when cutting brittle yarn.
  • FIG. 2 is a simplified front view, i.e. drawn from the stop edge.
  • two tubes of a bundle of blowing nozzles 1 can again be seen.
  • the position of the respective weft thread is indicated in the tube axis of the nozzles by dash-dotted lines.
  • the block of the alignment aid 2 is shown in section. Its funnel-shaped opening, which narrows from the further part 2a with a width of approximately the diameter of the bundle towards the reed 3 towards a narrower outlet opening 2b, the diameter of which corresponds approximately to the width of the guide channel 4.
  • a simple connecting line 10 provides a mechanical connection between the sley, not shown in more detail, e.g. indicated from the reed bar to the bundle of blowing nozzles 1. This is intended to show that reed 3 and blowing nozzles 1 are firmly coupled to one another and together perform the stop movement A, whereas the alignment aid 2 remains stationary.
  • Fig. 3 shows a reed 3, which consists of profiled teeth 11.
  • the rivet teeth 11 have two projecting lugs, between which the thread guide channel 4 is formed.
  • the position of the shed is indicated by a pair of warp threads 6 and 7 denotes the finished fabric.
  • For the reed 3, three different positions are shown, on the far left the rest position of the reed 3 during the main time of the weft thread entry, slightly to the right in the direction of the stop movement A, an intermediate layer 3 'and on the far right the end position 3' in the stop position on the The stop edge of the fabric 7.
  • the fixed position of the alignment aid 2 with its slot 2c is shown in broken lines. The slot 2c is open to the right towards the stop edge (or towards the scissors not shown here).
  • This lateral opening is designated 2d and enables the weft thread to exit and be transferred to the scissors.
  • the peripheral edge of the wide opening 2a facing the blowing nozzles 1 at the inlet of the thread and the peripheral edge at the narrower outlet opening 2b are clearly recognizable.
  • the width 2b at the outlet opening corresponds essentially to the width of the guide channel 4.
  • the time elapsing during the stop movement between positions 3 and 3 'of the reed which also corresponds to the time when the slot 2c is covered, can be obtained for the weft insertion. This means that the number of revolutions of the machine can be increased and the economy of the weaving machine can be improved.
  • FIG. 4 corresponds to that of FIG. 3 with the difference that the fixed position of the weft scissors 8 is also indicated by dashed lines.
  • the scissors 8 are located in front of the reed position 3 ⁇ in the amount of the stop edge of the fabric 7.
  • a thread guide bracket 9 is provided in this figure both on the upper and on the lower part of the alignment aid 2, which continues to the weft scissors 8.
  • Such thread guide bracket 9 can, depending on the requirements, depending on the type and properties of the processed yarn, be provided on the upper and / or on the lower part of the alignment aid 2.
  • 5 shows a form of training in which the block of the alignment aid 2 is somewhat reduced. 5 corresponds to the structure of FIG. 2.
  • the alignment aid 2 is equipped with a shorter funnel.
  • an auxiliary reed 13 which is formed from reed teeth 12, is provided between the alignment aid 2 and the reed 3.
  • the profile teeth 11 of the reed 3 form a guide channel 4 which extends over the width of the entire reed 3 with a constant width.
  • the rivet teeth 12 form their own guide channel 14, which is also funnel-shaped as a continuation of the funnel of the alignment aid 2 and is used for funnel-shaped guiding of the weft thread up to the actual guide channel 4.
  • the entire funnel-shaped guide is therefore divided into two successive components.
  • Profile teeth 12 are used here, which are provided with only a single projecting nose.
  • the teeth are alternately arranged so that the protruding nose points alternately with its steep flank up or down. This way two Rows of noses formed between which the guide channel 14 extends.
  • the mutual position of two successive teeth is slightly shifted between teeth with the same arrangement of their nose so that an oblique connecting line of the nose edges is formed, the connecting lines of the upper and lower nose edges converging and thus forming the funnel-shaped course of the guide channel 14.
  • the contour of the rearmost pair of teeth 12 ' is shown in Fig. 6 with dotted lines, so that the displacement of the nose edges relative to the front pair of teeth 12 is clear. In this way, no complex special manufacture of the auxiliary reed with teeth to be specially manufactured is required.

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

Claims (7)

1. Dispositif d'insertion de trame pour métiers à tisser pneumatiques, comportant au moins deux buses soufflantes (1) réunis en un faisceau et aptes à pivoter avec le peigne, et un organe auxiliaire d'alignement (2) pour le peigne, qui est disposé entre les buses soufflantes et un canal de guidage formé le long du peigne, et qui est pourvu d'une ouverture en entonnoir correspondant à peu près au diamètre total du faisceau des buses soufflantes et placée en face de celles-ci, et d'une ouverture de sortie (2b) orientée vers le canal de guidage (4) et rétrécie sensiblement suivant la largeur en coupe transversale de celui-ci, caractérisé en ce que l'organe d'alignement (2) est disposé de façon stationnaire, dans le sens de la trame, dans le prolongement immédiat des buses soufflantes (1) pour faire la jonction avec le canal de guidage (4), et est conçu comme une fente (2c) qui est effilée en entonnoir dans le sens de l'ouverture de sortie (2b) et dont la longueur correspond sensiblement au trajet (3-3′) balayé par le canal de guidage (4) lors du pivotement du peigne (3), pendant l'insertion de la trame.
2. Dispositif d'insertion de trame selon la revendication 1, caractérisé en ce que la fente (2c) est ouverte (2d) en direction du côté de battage.
3. Dispositif d'insertion de trame selon la revendication 1 ou 2, caractérisé en ce que l'organe auxiliaire d'alignement (2) est disposé en face de ciseaux de trame (8) dans le sens du déplacement du peigne, et en ce qu'il est prévu un étrier guide-fil (9) reliant ces deux éléments.
4. Dispositif d'insertion de trame selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le commencement du canal de guidage (4), dans le prolongement de l'ouverture de sortie (2b) de l'organe auxiliaire d'alignement (2), est conçu en forme d'entonnoir (14).
5. Dispositif d'insertion de trame selon la revendication 4, caractérisé en ce que le canal de guidage (4) est formé, d'une manière connue, par des dents de peigne (11) profilées pourvues de parties faisant saillie au-dessus et au-dessous de la trajectoire du fil de trame.
6. Dispositif d'insertion de trame selon la revendication 5, caractérisé en ce qu'il est prévu des dents de peigne (12) profilées du même type comportant une partie saillante formant alternativement une délimitation supérieure et inférieure du canal de guidage (14), lesdites parties saillantes de dents de peigne (12-12′) successives étant à chaque fois légèrement décalées les unes par rapport aux autres.
7. Dispositif d'insertion de trame selon la revendication 5 ou 6, caractérisé en ce que les dents de peigne (12) de la partie d'entonnoir du canal de guidage (14) sont réunies en un peigne auxiliaire (13) séparé, dans le prolongement immédiat du corps de l'organe auxiliaire d'alignement (2).
EP88119391A 1987-12-01 1988-11-22 Système d'insertion de la trame pour machines à tisser pneumatiques avec au moins deux tuyères réunies en faisceau Expired - Lifetime EP0318802B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3740666A DE3740666C1 (de) 1987-12-01 1987-12-01 Schusseintragvorrichtung fuer pneumatische Webmaschinen mit wenigstens zwei zu einem Buendel zusammengefassten Blasduesen
DE3740666 1987-12-01

Publications (2)

Publication Number Publication Date
EP0318802A1 EP0318802A1 (fr) 1989-06-07
EP0318802B1 true EP0318802B1 (fr) 1991-07-10

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EP88119391A Expired - Lifetime EP0318802B1 (fr) 1987-12-01 1988-11-22 Système d'insertion de la trame pour machines à tisser pneumatiques avec au moins deux tuyères réunies en faisceau

Country Status (4)

Country Link
US (1) US4905741A (fr)
EP (1) EP0318802B1 (fr)
JP (1) JPH0226961A (fr)
DE (2) DE3740666C1 (fr)

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DE4131167A1 (de) * 1991-09-19 1993-03-25 Dornier Gmbh Lindauer Luftwebmaschine mit einrichtung zur bildung einer gewebegasse
US5449240A (en) * 1992-12-23 1995-09-12 Dorpfeld; Wayne L. Apparatus for embossing Braille labels
IT1266634B1 (it) * 1993-10-27 1997-01-09 Nuovo Pignone Spa Pettine perfezionato per telaio tessile ad aria
DE4424271C1 (de) * 1994-07-09 1995-06-29 Dornier Gmbh Lindauer Luftwebmaschinen mit Kantenniederhalter
KR100405631B1 (ko) * 1995-10-10 2004-03-20 텍스틸마 악티엔게젤샤프트 공압식씨실삽입장치를구비한기계식직기
DE19545840C1 (de) * 1995-12-08 1997-01-23 Dornier Gmbh Lindauer Webblatt (Riet)
US6223779B1 (en) * 1997-04-09 2001-05-01 Textilma Ag Auxiliary selvage forming and weft thread cutting device
DE29721042U1 (de) * 1997-11-28 1998-02-05 Dornier Gmbh Lindauer Webmaschine, insbesondere Luftdüsenwebmaschine
DE19802910C2 (de) 1998-01-27 2000-08-03 Dornier Gmbh Lindauer Webmaschine, insbesondere mit pneumatischem Schußfadeneintrag
DE19806953C2 (de) * 1998-02-19 2000-03-02 Dornier Gmbh Lindauer Schneideinrichtung in Webmaschinen
US7748414B2 (en) * 2006-12-12 2010-07-06 Itema (Switzerland) Ltd Method and apparatus for the insertion of weft threads
WO2009025803A1 (fr) 2007-08-20 2009-02-26 Kevin Kremeyer Systèmes de dépôt d'énergie, équipement et procédés permettant de modifier et de commander des ondes de choc et un écoulement supersonique
DE102009036589A1 (de) 2009-08-07 2011-02-10 Lindauer Dornier Gmbh Vorrichtung zum Übergeben eines bandförmigen Schussmaterials
DE102009037127A1 (de) * 2009-08-11 2011-02-17 Lindauer Dornier Gmbh Greiferkopf einer Webmaschine
US10669653B2 (en) 2015-06-18 2020-06-02 Kevin Kremeyer Directed energy deposition to facilitate high speed applications
WO2016205750A1 (fr) * 2015-06-18 2016-12-22 Kevin Kremeyer Dépôt d'énergie dirigé pour faciliter des applications haute vitesse
BE1024804B1 (nl) * 2016-12-08 2018-07-10 Picanol Nv Inslagdraad geleidingsinrichting voor een luchtstraalweefmachine

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JPS61138747A (ja) * 1984-12-04 1986-06-26 津田駒工業株式会社 流体噴射無杼織機の多色緯糸插入装置
EP0229588B1 (fr) * 1985-12-20 1990-07-25 GebràœDer Sulzer Aktiengesellschaft Métier à tisser à jet d'air

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Publication number Publication date
EP0318802A1 (fr) 1989-06-07
DE3863632D1 (de) 1991-08-14
DE3740666C1 (de) 1989-03-02
US4905741A (en) 1990-03-06
JPH0226961A (ja) 1990-01-29

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