EP0335011A2 - Métier à jet d'air avec dispositif de pinçage et d'étirage - Google Patents

Métier à jet d'air avec dispositif de pinçage et d'étirage Download PDF

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Publication number
EP0335011A2
EP0335011A2 EP19880121758 EP88121758A EP0335011A2 EP 0335011 A2 EP0335011 A2 EP 0335011A2 EP 19880121758 EP19880121758 EP 19880121758 EP 88121758 A EP88121758 A EP 88121758A EP 0335011 A2 EP0335011 A2 EP 0335011A2
Authority
EP
European Patent Office
Prior art keywords
weft
clamping
thread
weft thread
air jet
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Withdrawn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
EP19880121758
Other languages
German (de)
English (en)
Inventor
Wilhelm Rupp
Adnan Dr.-Ing. Wahhoud
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 EP0335011A2 publication Critical patent/EP0335011A2/fr
Withdrawn legal-status Critical Current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
    • D03D47/28—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
    • D03D47/3066—Control or handling of the weft at or after arrival
    • D03D47/308—Stretching or holding the weft
    • 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

Definitions

  • the invention relates to an air jet loom according to the preamble of claim 1.
  • Such an air jet loom has become known, for example, with the subject of DE 36 21 340Al.
  • the clamping device used there has the purpose of minimizing the weft thread waste that is necessarily given.
  • the weft end rests on a clamping element which is arranged next to the leno selvedge, a clamping thread running transversely to the weft end being provided, which holds the weft end in a clamping manner during the setting process.
  • the invention is therefore based on the object of keeping the weft insertion of a weft with the air jet constant over the entire weaving width, so that the fabric quality on the weft side has the same density as the fabric quality on the catch side.
  • the invention is characterized in that a stretching device is arranged outside the reed in the weft direction in front of the clamping device, which stretches and thus tensions the weft thread fixed in the clamping device to form a weft loop.
  • a stretching device comes into action, which is placed on the weft thread and stretches and tightens the weft thread to form a weft thread loop so that it has uniform tension over the entire reed width .
  • the stretching device consists of at least one actuating member which can be raised and lowered perpendicularly to the longitudinal axis of the weft thread and which runs transversely to the weft thread and can be placed on the weft thread.
  • the actuating member is formed by one or more stretching threads which can be placed transversely on the weft thread in the sense of the above-described teaching and which can stretch and tighten it to form a weft thread loop.
  • the actuating member of the stretching device is a stretching needle, i.e. the stretching thread is replaced by a needle-shaped element.
  • the stretching device is arranged in the space between the reed for the auxiliary bar and the reed for the clamping device.
  • the stretching device operates after the clamping device. According to a preferred embodiment of the present invention, this is achieved in that the Drawstring associated with the stretching device and the clamping threads assigned to the clamping device are guided through recesses at the same height of a control needle which can be raised and lowered and that the clamping thread is guided past the higher clamping contact surface of the clamping device into the space between the reeds to form a weft loop.
  • FIG. 1 shows that the air-jet weaving machine has one or more main nozzles 1, through which a weft thread 3 runs, which is injected into the weft thread insertion channel 8 via a corresponding air flow from the main nozzle.
  • the weft insertion channel 8 is formed in a reed 4 which consists of individual reed teeth 7 which are spaced apart from one another and through which the warp threads 6 are arranged parallel to one another at a mutual spacing.
  • relay nozzles 5 are arranged, which dip into the shed and generate an air flow directed obliquely towards the catch side.
  • This air flow flowing obliquely into the shed carries the weft thread 3 from the weft side (main nozzle 1) to the catch side (right illustration in FIG. 1).
  • the catching side of the air jet weaving machine is formed in a manner known per se by a weft monitor 9, which sits in the weft direction in front of a reed for an auxiliary bar 14, behind which a clamping device 10 known per se is arranged.
  • this clamping device is that with the shed still open, the weft thread is clamped and held until the sheet stop.
  • a stretching device 13 is used according to the invention, which is arranged between the weft monitor 9 and the clamping device 10.
  • the stretching device is used to form a weft loop 12 (see FIG. 2) in order to tighten and tension the thread between the clamping device 10 and the main nozzle 1.
  • the stretching device 13 consists of one or more stretching threads 17 which run perpendicular to the longitudinal axis of the weft threads and the stretching thread or threads 17 can be moved in the space 23 of the reed 4, 14 in the direction perpendicular to the longitudinal axis of the weft thread.
  • the clamping device 10 consists of a clamping block 11 with an upper clamping contact surface 18, one or more clamping threads 16 being present on the clamping contact surface 18 for clamping the weft thread 3.
  • the clamping threads 16 are - just like the stretching thread 17 - movable in the vertical direction to the longitudinal axis of the weft thread in the interstices of the reed 14, so that the weft thread is clamped on the clamping contact surface 18 of the clamping device 10 by moving these clamping threads 16 in the direction of arrow 21.
  • a control needle 19 is used for this purpose, which has one or more recesses 22 lying next to one another.
  • a bundle of clamping threads can be passed through one part of the recesses, for example, while one or more stretching threads 17 are passed through another part of the recess 22.
  • the control needle 19 is not in the arrow directions 20,21 driven eccentric drive shown.
  • the drive of the control needle 19 by means of an eccentric drive has the essential advantage that independent control of the movement of the control needle 19 is thereby ensured, independently of the movement control of the shedding elements.
  • an independently acting eccentric drive for the movement drive of the control needle 19 in the arrow directions 20, 21 is selected, this eccentric drive being carried out directly by a secondary drive of the drive shaft. Any movement sequences in the arrow directions 20, 21 of the control needle 19 can thus be communicated by adjusting the eccentric.
  • FIGS. 2 and 3 also show that the clamping device 10 is also assigned its own reed 15 for the clamping threads.
  • weft loop 12 is not formed downwards, as shown in FIGS. 2 and 3, but upwards, i.e. the control needle 19 would then move in the direction of the arrow 20 from below against the weft thread upwards to such an extent that the weft thread loop 12 forms upwards.
  • clamping device 10 is also turned over, i. H. the clamping block 11 would then be on top and the clamping surface 18 would then be on the bottom in exactly the opposite way as is now shown in FIGS. 2 and 3.
  • a stretching thread 17 instead of using a stretching thread 17, a single needle can also be used, which instead of the stretching thread 17 engages in the space 23 of the shed 14 and touches the surface of the crossing weft thread 3 and takes it along.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP19880121758 1988-03-26 1988-12-28 Métier à jet d'air avec dispositif de pinçage et d'étirage Withdrawn EP0335011A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3810335 1988-03-26
DE19883810335 DE3810335A1 (de) 1988-03-26 1988-03-26 Luftduesenwebmaschine mit schussfadenklemm- und streckeinrichtung

Publications (1)

Publication Number Publication Date
EP0335011A2 true EP0335011A2 (fr) 1989-10-04

Family

ID=6350789

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880121758 Withdrawn EP0335011A2 (fr) 1988-03-26 1988-12-28 Métier à jet d'air avec dispositif de pinçage et d'étirage

Country Status (3)

Country Link
EP (1) EP0335011A2 (fr)
JP (1) JPH01280045A (fr)
DE (1) DE3810335A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004059055A1 (fr) * 2002-12-20 2004-07-15 Picanol N.V. Dispositif et procede d'etirage
US7857013B2 (en) 2006-04-28 2010-12-28 Toray Industries, Inc. Method for producing carbon fiber woven fabric
CN102758300A (zh) * 2012-06-23 2012-10-31 咸阳经纬纺织机械有限公司 边纱织口稳定装置及防止低密度织物烂边的喷气织机
CN103572473A (zh) * 2013-10-31 2014-02-12 绍兴纺织机械集团有限公司 一种喷气式织机的主机***

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19810129B4 (de) * 1998-03-09 2004-08-05 Lindauer Dornier Gmbh Schußfadenstreck- und -detektiereinrichtung für Düsenwebmaschinen
US6076563A (en) * 1998-03-09 2000-06-20 Lindauer Dornier Gesellschaft Mbh Weft stretching and detecting apparatus for a jet weaving loom

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3621340A1 (de) * 1986-06-26 1988-01-14 Kloecker Entwicklungs Gmbh Vorrichtung zur erzielung eines geringen schussfadenabfalls

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004059055A1 (fr) * 2002-12-20 2004-07-15 Picanol N.V. Dispositif et procede d'etirage
US7559344B2 (en) 2002-12-20 2009-07-14 Picanol N.V. Device and method for stretching
US7857013B2 (en) 2006-04-28 2010-12-28 Toray Industries, Inc. Method for producing carbon fiber woven fabric
CN102758300A (zh) * 2012-06-23 2012-10-31 咸阳经纬纺织机械有限公司 边纱织口稳定装置及防止低密度织物烂边的喷气织机
CN102758300B (zh) * 2012-06-23 2013-11-20 咸阳经纬纺织机械有限公司 边纱织口稳定装置及防止低密度织物烂边的喷气织机
CN103572473A (zh) * 2013-10-31 2014-02-12 绍兴纺织机械集团有限公司 一种喷气式织机的主机***

Also Published As

Publication number Publication date
DE3810335C2 (fr) 1990-01-04
DE3810335A1 (de) 1989-10-05
JPH01280045A (ja) 1989-11-10

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