EP0297040B1 - Procédé pour l'insertion de trame dans un métier pneumatique multicouleurs et métier pour l'exécution de ce procédé - Google Patents

Procédé pour l'insertion de trame dans un métier pneumatique multicouleurs et métier pour l'exécution de ce procédé Download PDF

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Publication number
EP0297040B1
EP0297040B1 EP88810399A EP88810399A EP0297040B1 EP 0297040 B1 EP0297040 B1 EP 0297040B1 EP 88810399 A EP88810399 A EP 88810399A EP 88810399 A EP88810399 A EP 88810399A EP 0297040 B1 EP0297040 B1 EP 0297040B1
Authority
EP
European Patent Office
Prior art keywords
weft
picking
yarn
entry
nozzle
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
EP88810399A
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German (de)
English (en)
Other versions
EP0297040A1 (fr
Inventor
Robert Bucher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sulzer AG
Original Assignee
Gebrueder Sulzer AG
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Publication date
Application filed by Gebrueder Sulzer AG filed Critical Gebrueder Sulzer AG
Publication of EP0297040A1 publication Critical patent/EP0297040A1/fr
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Publication of EP0297040B1 publication Critical patent/EP0297040B1/fr
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
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • 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 method for inserting weft threads into a pneumatic multi-color weaving machine (siche ZBGB-A-2 151 266), in which a thread store is available for each weft color, wherein before the insertion of a weft thread of a certain weft color, this is done by means of a thread stopper is held and is held stretched by a holding air flow in an entry channel of a multicolor entry nozzle.
  • the invention further relates to a pneumatic multi-color weaving machine for performing the method.
  • a weft thread that is currently not to be inserted can be held in place by means of a thread stopper and its free end can be kept stretched in the entry nozzle by means of a holding air flow.
  • the weft thread can be held on the thread store in question by means of a finger stopper.
  • the invention has for its object to provide a method of the type defined at the outset which avoids that a defective edge zone is created on the catch side in a multicolor fabric.
  • This object is achieved according to the invention in that a weft thread (18 ', 55, 70), which has a large weft repeat, from the weft thread store (15) with an excess length (L1, L2, L3) at least equal to that in the entry channel (36', 62 , 66, 75) held thread length (L1) is supplied.
  • the subclaims to claim 1 relate to advantageous developments.
  • Another object of the invention is to create a pneumatic multicolor weaving machine for carrying out the method. According to the invention, this object is achieved by the features specified in the characterizing part of claim 7.
  • the subclaims to claim 7 make advantageous further developments.
  • a weft feed device 1 is shown on one side of a pneumatic Merhmaschine weaving machine.
  • a drive motor 2 which drives a main shaft 4 of the machine via a belt drive 3.
  • the main shaft 4 is supported in two cheeks 5 and 6 on both sides of the machine.
  • the warp beam, the heald frames, the reed, the fabric and the goods tree are identified with the reference numbers 7, 8, 9, 10 and 11, respectively.
  • a weft feed device 1 consists of three thread stores 15, 16 and 17, each of which stores a weft 18, 19 and 20. These weft threads are referred to below as weft colors 18 ', 19' and 20 '.
  • Each thread store receives its weft color from a supply spool;
  • the thread store 15 receives the weft color 18 'from a supply spool 21.
  • the weft color 18' passes through a bore in a thread winder 22 and its winding tube 23.
  • the rotating winding tube 23 winds the weft color 18 'on a conical section 24 of a stationary drum 25 of the thread store 15.
  • a beginning 27 of the thread supply 26 is countered by a holding pin 27 until the moment of entry into the weaving machine Secured slipping.
  • the holding pin 27 is controlled via a control line 28 by a pattern-programmed control device 29.
  • the rotation of the winder tube 23 is also controlled by the control device 29 via a control line 30.
  • the control device 29 is by means of a inductive sensor 31, which cooperates with a control disk 32 located on the main shaft 4 of the machine, synchronized with the weaving machine.
  • the thread length between the mouth 38 of the entry channel 36 'and a thread stopper 37 is designated L2.
  • the thread stopper 37 is controlled by the control device 29 via a line 39. If the weft color 18 'is held on the thread store 15 instead of by means of the separate thread stopper 37, this is provided with a finger stop 40.
  • the finger stopper 40 is controlled by the control device via a line 41.
  • the thread length between the mouth 38 of the entry channel 36 'and the finger stop 40 is designated L3.
  • the length L1 of the weft color 18 ' is exposed to the damaging effect of the holding air flow with a long waiting time between two entries. If the weft color consists of an easily twistable yarn, the damage can continue over the length L2 to the thread stopper 37 or over the length L3 to the finger stopper 40. In addition, the thread length L2 and L3 can have clamp marks due to the clamping pressure of the thread stopper or the finger stopper.
  • the weft color 18 'does not have to be entered for a long time. It is also assumed that the weft color 18 'is only damaged over the length L 1.
  • the shot colors 19 'and 20' are entered regularly, for example alternately. If the weft color 18 'is to be entered, the air pressure in the nozzle 36 is increased from the holding pressure to the entry pressure. At the same time, the holding finger 27 on the thread store 15 is raised by the control device 29, as a result of which the thread supply 26 thereon is released. The thread stopper 37 is also raised by the control device 29 and the weft insertion begins.
  • the control device 29 is programmed so that the thread store 15 releases a thread length equal to the weaving width L and additionally L 1 in the nozzle 36.
  • the length L1 is therefore an excess length.
  • the weft color 18 ' is now entered by the nozzle 36 into the shed 45, ahead of the excess length L1.
  • the excess length L 1 is taken up by a stretching nozzle 46 on the catch side of the machine.
  • the weft color is then cut off on both sides of the shed 45 by scissors 47 and 48 and struck by the reed 9. It follows that the damaged length L 1 is not woven into the fabric 49. Its edge zone 50 thus remains error-free.
  • the cut excess length L 1 is discharged from the stretching nozzle 46.
  • the so-called loss length that is the length L4 of the weft color, which is inevitably always lost, is included in the excess length L1.
  • the actual loss thread length is thus only L1-L4.
  • the excess length can be cut off before the weft insertion and entering the shed. 3-6 show devices for this.
  • a weft color 55 is assumed to be entered into the shed with an excess length L 1 through a tunnel reed 56.
  • the other shot colors, e.g. 57, are without excess length to be entered.
  • a suction pipe 59 is set up vertically, the inlet 60 of which extends to just below an opening 61 of an inlet channel 62 of the nozzle.
  • a pair of scissors 63 is arranged between the mouth 61 of the entry channel 62 and the inlet 60 of the suction pipe 59. If the weft color 55 is to be entered, the control device 29 controls the thread store 15 in such a way that it first releases the excess length L 1.
  • the excess length L 1 is simultaneously detected when leaving the mouth 61 of the entry channel 62 of the nozzle 58 and appears in front of the inlet 60 of the suction pipe 59, deflected and sucked up. After the excess length L 1 has been added to the suction pipe, it is cut off by the scissors 63. Now the control device 29 causes the thread store 15 to release the entire weft color length for insertion. The extension-side stretch nozzle takes up the normal loss length L4 of the weft color. The process described is basically the same if the weft color 55 is to be entered with the excess length L 1 or L 3.
  • the thread store is to be controlled accordingly by the control device.
  • the suction tube can be slidably mounted along the nozzle 58, so that it can be installed as required in front of the entry channel which carries a weft color with a large repeat pattern.
  • a suction pipe can be arranged in front of each inlet channel, which can be pressurized with negative pressure as required.
  • an entry nozzle 65 with entry channels 66 lying one above the other is shown.
  • a suction pipe or suction pipes 67 extend accordingly in the horizontal direction. The mode of operation is the same as described for FIG. 3.
  • the weft paint to be deflected is sucked in by a suction pipe and at the same time directed by a blowing pipe against the suction pipe.
  • a suction channel 72 In a block 71 there is a suction channel 72, the inlet 73 of which lies in front of an opening 74 of an inlet channel 75 of an inlet nozzle 76. Blown air flows into the block 71 through a second duct 77. The blown air flows through a branch 78 into the suction duct 72 and causes a suction effect at the entrance 73 thereof by ejection action.
  • a second branch 79 from the blow duct 77 leads through a blower tube 80 which leads to the nozzle 76 overlaps and ends on the other side with its mouth 81 in front of the mouth 74 of the entry channel 75.
  • the excess length L 1 to be deflected and extracted is, as soon as it leaves the entry channel 75, at the same time detected by the blown air from the blow pipe 80 and the suction effect at the inlet 73 of the suction channel 72 and conveyed into the suction channel. As soon as the excess length L 1 has been recorded, it is cut off by scissors 82. The shot color 70 is then entered.

Claims (12)

1. Procédé d'insertion de trame dans un métier à tisser pneumatique en plusieurs couleurs, dans lequel chaque couleur de trame a son propre stockeur de fil, ce fil, avant l'insertion d'un fil de trame d'une couleur de trame déterminée, étant retenu au moyen d'un stoppeur de fil et étant maintenu tendu par un courant d'air de maintien dans un canal d'insertion d'une buse d'insertion de plusieurs couleurs, caractérisé en ce qu'un fil de trame (18′, 55, 70) qui présente un grand rapport de trame est fourni par le stockeur de fil de trame (15) avec une longueur excédentaire (L₁, L₂, L₃) au moins égale à la longueur de fil (L₁) maintenue dans le canal d'insertion (36′, 62, 66, 75).
2. Procédé selon la revendication 1, dans lequel les fils de trame sont retenus chacun au moyen d'un stoppeur de fil entre le stockeur de fil et la buse d'insertion, caractérisé en ce que la longueur excédentaire est égale à la longueur (L₂) du fil de trame (18′) entre l'embouchure (38) du canal d'insertion (36′) et le stoppeur de fil (37) concerné.
3. Procédé selon la revendication 1, dans lequel les fils de trame sont retenus chacun sur le stockeur de fil, au moyen d'un stoppeur à doigt, caractérisé en ce que la longueur excédentaire est égale à la longueur (L₃) du fil de trame (18′), entre l'embouchure (38) du canal d'insertion (36′) et le stoppeur à doigt (40) sur le stockeur de fil (15).
4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que la longueur excédentaire (L₁, L₂, L₃) est coupée, côté cueillage, après l'insertion du fil de trame (18′).
5. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que la longueur excédentaire (L₁, L₂, L₃) est déviée de la ligne de trame, coupée et évacuée, avant insertion du fil de trame (18′).
6. Procédé selon la revendication 5, caractérisé en ce que la longueur excédentaire (L₁, L₂, L₃) est déviée et coupée au moins un cycle de tissage avant l'insertion de la couleur de trame (55; 70).
7. Métier à tisser pneumatique pour plusieurs couleurs pour la mise en oeuvre du procédé selon la revendication 5, comportant un stockeur de fil de trame par couleur de trame, une buse d'insertion multiple dans laquelle les fils de trame sont maintenus chacun, avant leur insertion dans le métier à tisser, par un courant d'air de maintien dans un canal d'insertion, et comportant des stoppeurs de fil pour bloquer les fils de trame, caractérisé en ce qu'en dehors de l'embouchure (61; 74) du canal d'insertion (62; 75) de la buse d'insertion (58; 76) maintenant la couleur de trame (55; 70) avec un grand rapport, se trouve un tube d'aspiration (59; 72), transversal à cette buse, dont l'entrée (60; 73) se situe dans la région de l'embouchure (61; 74) du canal d'insertion et en ce qu'un dispositif de séparation (63; 82) pour la couleur de trame avec un grand rapport se trouve entre l'embouchure du canal d'insertion (62; 75) et l'entrée du tube d'aspiration.
8. Métier à tisser selon la revendication 7, caractérisé en ce que le tube d'aspiration (59; 72) peut coulisser par rapport aux embouchures (61; 74) des canaux d'insertion (62; 75).
9. Métier à tisser selon la revendication 7, caractérisé en ce qu'il est prévu un tube de soufflage (80) dont l'embouchure (81) se situe face à l'entrée (73) du tube d'aspiration (72).
10. Métier à tisser selon la revendication 9, caractérisé en ce que le tube de soufflage (80) et le tube d'aspiration (72) sont réalisés sous la forme de canaux dans un bloc (71) qui s'étend transversalement à la buse d'insertion (76), une partie du bloc (72) s'accrochant sur la buse d'insertion par le tube de soufflage (80).
11. Métier à tisser selon la revendication 10, caractérisé en ce que le canal de soufflage (80) communique, par un canal de liaison (78), avec le canal d'aspiration (72) qui agit comme un éjecteur pour le canal d'aspiration.
12. Métier à tisser selon la revendication 10 ou 11, caractérisé en ce que le bloc (71) peut coulisser transversalement à la buse d'insertion de manière que le canal d'aspiration (72) et le canal de soufflage (80) se trouvent chacun face à une autre embouchure (74) d'un canal d'insertion (75).
EP88810399A 1987-06-25 1988-06-13 Procédé pour l'insertion de trame dans un métier pneumatique multicouleurs et métier pour l'exécution de ce procédé Expired - Lifetime EP0297040B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2391/87 1987-06-25
CH239187 1987-06-25

Publications (2)

Publication Number Publication Date
EP0297040A1 EP0297040A1 (fr) 1988-12-28
EP0297040B1 true EP0297040B1 (fr) 1991-06-26

Family

ID=4232680

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88810399A Expired - Lifetime EP0297040B1 (fr) 1987-06-25 1988-06-13 Procédé pour l'insertion de trame dans un métier pneumatique multicouleurs et métier pour l'exécution de ce procédé

Country Status (5)

Country Link
US (1) US4915144A (fr)
EP (1) EP0297040B1 (fr)
JP (1) JPS6420356A (fr)
BR (1) BR8803122A (fr)
DE (1) DE3863397D1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0247338A (ja) * 1988-08-06 1990-02-16 Nissan Motor Co Ltd 流体噴射式織機の緯糸処理方法
EP0389410A1 (fr) * 1989-03-17 1990-09-26 Sulzer RàœTi Ag Dispositif d'enfilage de fil de trame pour métier à tisser
EP0421511A1 (fr) * 1989-10-04 1991-04-10 Picanol N.V. Procédé et dispositif pour l'alimentation de fils de trame dans la foule d'un métier à jet d'air
US5501250A (en) * 1994-11-22 1996-03-26 E. I. Du Pont De Nemours And Company Method for deleting and reintroducing yarns to a textile process
DE10224078A1 (de) * 2002-05-31 2003-12-18 Dornier Gmbh Lindauer Verfahren zum Gestreckthalten eines Schussfadens und Webmaschine zur Verfahrensdurchführung
DE10393812D2 (de) * 2002-09-18 2005-08-11 Dornier Gmbh Lindauer Verfahren zum Halten eines Schussfadens und Düsenwebmaschine, insbesondere zur Durchführung des Verfahrens
CN102877194B (zh) * 2012-09-29 2014-03-05 浙江三禾纺织机械有限公司 一种储纬器花型预知的控制系统及其控制方法
US9487887B1 (en) * 2013-03-13 2016-11-08 Jonathan Grossman Systems and methods for manufacturing textiles

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3203876A1 (de) * 1982-02-05 1983-08-18 Guenne Webmaschf Gmbh Vorrichtung zum getrennten und/oder gemeinsamen einblasen verschiedenfarbiger schussfaeden bei luftduesen-webmaschinen
KR860002101B1 (ko) * 1982-05-11 1986-11-25 가부시기 가이샤 도요다 지도우 쇽기세이사꾸쇼 젯트직기에 있어서 위사처리방법 및 그 장치
JPS5966540A (ja) * 1982-10-02 1984-04-16 株式会社豊田自動織機製作所 無杼織機における緯糸欠点織込み防止方法
FR2556375B1 (fr) * 1983-12-13 1986-06-20 Saurer Diederichs Sa Dispositif d'alimentation en air comprime pour machine a tisser avec insertion pneumatique d'au moins deux fils de trame
FR2556749B1 (fr) * 1983-12-20 1986-04-11 Alsacienne Constr Mat Tex Procede et dispositif pour la preparation et la mesure de longueurs determinees de fils de trame dans un metier a tisser multiduites
CH662136A5 (de) * 1984-01-19 1987-09-15 Rueti Te Strake Bv Verfahren zum betrieb einer webmaschine und vorrichtung zum durchfuehren des verfahrens.
JPH07858B2 (ja) * 1985-02-21 1995-01-11 株式会社豊田中央研究所 ジエツトル−ムにおける複数のよこ糸選択貯留装置の制御装置
NL8503439A (nl) * 1985-12-13 1987-07-01 Picanol Nv Apparaat om een inslagdraad aan een hoofdblazer toe te voeren bij weefmachines.

Also Published As

Publication number Publication date
EP0297040A1 (fr) 1988-12-28
JPS6420356A (en) 1989-01-24
DE3863397D1 (de) 1991-08-01
US4915144A (en) 1990-04-10
BR8803122A (pt) 1989-01-24

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