EP0976859A1 - Procédé pour la réparation de fils de trame cassés dans les métiers à tisser, plus particulièrement les métiers à jet d'air - Google Patents

Procédé pour la réparation de fils de trame cassés dans les métiers à tisser, plus particulièrement les métiers à jet d'air Download PDF

Info

Publication number
EP0976859A1
EP0976859A1 EP99111474A EP99111474A EP0976859A1 EP 0976859 A1 EP0976859 A1 EP 0976859A1 EP 99111474 A EP99111474 A EP 99111474A EP 99111474 A EP99111474 A EP 99111474A EP 0976859 A1 EP0976859 A1 EP 0976859A1
Authority
EP
European Patent Office
Prior art keywords
insert
weft
weft thread
shed
thread
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.)
Ceased
Application number
EP99111474A
Other languages
German (de)
English (en)
Inventor
Hubertus Ludwig
Hans-Joachim Zeller
Adnan Dr. 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 EP0976859A1 publication Critical patent/EP0976859A1/fr
Ceased legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/06—Driving, starting, or stopping arrangements; Automatic stop motions using particular methods of stopping
    • D03D51/08—Driving, starting, or stopping arrangements; Automatic stop motions using particular methods of stopping stopping at definite point in weaving cycle, or moving to such point after stopping
    • D03D51/085—Extraction of defective weft

Definitions

  • the invention relates to a method for eliminating a weft error on weaving machines, in particular air-jet weaving machines with pneumatic inserts, with the features of the preamble of patent claim 1.
  • the invention further relates to a weaving machine with the features according to the preamble of patent claim 5.
  • Weaving machines are known, in particular air jet weaving machines, which are equipped with purely pneumatically operated inserts for forming firm, closed fabric edges.
  • an insert is positioned on the input and output sides of a shed to be formed and close to the stop edge of a fabric in the weaving machine, in such a way that the weft thread entered into the shed when struck against the stop edge of the fabric by a reed at the same time over the approximately V-shaped trained weft thread inlet of the respective insert into an end-limited centering slot of the insert lying approximately in the plane of the stop edge of the fabric.
  • a weft thread correctly inserted into the shed is cut by weft scissors known to be arranged in this area after striking the stop edge, the weft end in question is held pneumatically in the respective insert and subsequently the weft ends are pneumatically returned to a shed, which generally follows the shed, whose warp threads have tied the previously entered weft thread.
  • the process sequence of automatic weft breakage elimination requires, among other things, in air jet weaving machines that downstream and the exit side of the weft insertion channel of a reed there are means for grasping and pulling off the relevant weft thread, that the weft thread in question and struck on the stop edge of the fabric are not cut by the weft thread scissors and that So-called relay nozzles over the weaving width are present, which detach the relevant weft thread from the stop edge while forming a so-called weft thread loop when the shed is open.
  • the means for pulling off the weft thread is active, so that a programmed weft thread length for eliminating the weft error can be pulled off the pulling means, which is usually a pneumatically acting suction nozzle.
  • the object is achieved by means of a known process sequence automatic shot error correction solved additional procedural step, which consists in that the weft thread to be detached from the stop edge of the fabric during the Detaching downstream of the weft insertion in this way by means of at least one air pulse it is applied that the weft thread loop outside when the weft thread is pulled off of the insert centering slot or at least leaves the centering slot.
  • an air jet nozzle is provided according to the invention, the outlet of which is directed to a weft thread section which is on the exit side of the shed and which is preferably directed to the weft thread lying in the centering slot of the insert. It is advantageous if the air pulse at least on the warp side affects the centering slot of the insert and thereby strikes the weft thread within the centering slot. This means that the air pulse emerges from the jet nozzle at an acute angle to the longitudinal center axis of the insert.
  • the centering slot of the insert on the warp thread side has a predetermined length L in the direction of the upper warp threads and an impact surface designed in the direction of the lower warp threads in order to achieve a sufficiently high effectiveness of the air pulse in the centering slot and to allow the weft thread to slide out support from the centering slot.
  • the first blasting nozzle according to the invention it is conceivable to provide a further blasting nozzle on the output side, ie downstream of the centering slot, in order to support the effectiveness of the weft thread grinding out of the centering.
  • an additional flow channel can be provided in the insert on the outlet side be present, the output of which is directed to the weft.
  • the depositor at the time of the Fixing weft errors from the critical area of the weft movement controlled or by the pulling weft thread itself from its working position swung out and after the end of the shot error correction in its working position is pivoted back.
  • a weft error is eliminated by first detecting a weft monitor 2 on the output side of the weft insertion channel 3a of a reed 3, an error in the weft 4 inserted into the entry channel 3a by the main blowing nozzle 5.
  • the weft thread 4 passing through the weft monitor 2 is then gripped by a stationary suction nozzle 11 and held under tension.
  • the detection signal of the weft monitor 2 is used to prevent the cutting process of the weft shears 6 on the entry side and the weft shears 7 on the outlet side.
  • the weft thread 4 leading to a weft error and entered into the entry channel 3a of the reed 3 is struck by the reed 3 against the stop edge 8a of the fabric 8, although the drive of the sley (not shown) carrying the reed 3 is also switched off.
  • the striking of the weft thread is due to the fact that moments of inertia are effective in the drive of the weaving machine and in the sley itself, and to that extent a rivet stop following the stop signal of the weft thread guard 2 on the stop edge 8a cannot be prevented.
  • the relevant weft thread 4 is thus inevitably struck against the stop edge 8a of the fabric 8 after a stop signal from the weft guard 2.
  • At least one air pulse from a jet nozzle 13 acts on the weft thread 4 at an angle ⁇ against the weft thread movement 3b of the reed 3 in such a way that a weft fault in the form of a weft loop 4a does not deal with the weft fault correction during the automatic weft break removal on the output side of the shed 12 Insert 10 is tangent or at least blown out of insert 10.
  • the air pulse is directed at an acute angle ⁇ to the warp thread-side opening of the weft thread inlet 10a and the centering slot 10b of the insert 10, because here in connection with an inventive design of the warp thread-side opening of the weft thread inlet 10a and the centering slot 10b, the air impulse effect occurs Weft 4 is supported.
  • the further solution according to the invention consists in that the warp thread-side weft inlet 10a and the centering slot 10b form a baffle surface 14 for the at least one air pulse over a predetermined length L.
  • the insert 10 is also rotatably or at least pivotably mounted about an axis of rotation 16 located eccentrically to the longitudinal center axis 15 of the insert 10, the at least one air pulse acting on the baffle surfaces 14 leads to a pivoting movement of the insert 10 in the direction the double arrow 17.
  • the pivoting movement can be supported in combination with the tensile force F of the suction nozzle 11 present in the relevant weft thread section.
  • this presupposes that the relevant weft thread 4 is gripped by the suction nozzle 11 and that a weft thread loop 4a actually comes to rest on the insert 10 on the outlet side.
  • FIG. 3 shows the pneumatic insert according to view A according to FIGS. 2 and 4, as it is used in a schematically illustrated air jet weaving machine according to FIG. 2.
  • the insert 10 has a V-shaped weft inlet 10a which merges into the end-limited centering slot 10b, in which the weft end of the weft 4 to be inserted is held and finally in a shed 12 according to FIG. Figure 2 is returned.
  • the warp thread-side weft inlet 10a and the centering slot 10b each form an impact surface 14 between the upper and lower inlet legs 10c, 10d, on which the outlet 13a of a jet nozzle 13 can be aligned, see FIG. 2.
  • the lower and upper impact surface 14 of the insert 10, which is relevant for blowing out the weft thread 4, extends on the warp thread side approximately from the upper and lower edge of the insert leg 10c or 10d of the V-shaped weft thread inlet 10a to the upper and lower edge of the centering slot 10b.
  • a weft blowing nozzle 20 with compressed air connection 21 acting in the direction of the weft inlet 10 a can be provided in the end boundary 10 ′′ of the centering slot 10 b.
  • the compressed air connection 21 is connected to a flexible compressed air line 22.
  • FIG. 4 shows the insert 10 on the extract side according to the line BB in FIG. 3.
  • the respective edge 10b 'of the lower inlet leg 10d or the upper inlet leg 10c marks the beginning of the centering slot 10b according to FIG. 3.
  • a weft thread tensioning channel 18 is provided in front of the end limit 10b ′′ of the centering slot 10b, in which the end of the struck weft thread 4 on the exit side is held pneumatically becomes.
  • a weft insertion channel 19 is provided which blows the weft end held in the weft tensioning channel 18 into the relevant shed 12.
  • the insert 10 has an axis 16 which is rotatably mounted in a part of the weaving machine, not shown.
  • the impact surfaces 14 formed on the insert 10 in FIG. 5 each close one Angle ⁇ of more than 45 °.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP99111474A 1998-07-23 1999-06-12 Procédé pour la réparation de fils de trame cassés dans les métiers à tisser, plus particulièrement les métiers à jet d'air Ceased EP0976859A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833079 1998-07-23
DE19833079A DE19833079C2 (de) 1998-07-23 1998-07-23 Verfahren zum Beheben eines Schußfehlers auf Luftdüsenwebmaschinen mit pneumatischen Einlegern

Publications (1)

Publication Number Publication Date
EP0976859A1 true EP0976859A1 (fr) 2000-02-02

Family

ID=7874988

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99111474A Ceased EP0976859A1 (fr) 1998-07-23 1999-06-12 Procédé pour la réparation de fils de trame cassés dans les métiers à tisser, plus particulièrement les métiers à jet d'air

Country Status (4)

Country Link
US (1) US6129123A (fr)
EP (1) EP0976859A1 (fr)
JP (1) JP2000212860A (fr)
DE (1) DE19833079C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105758660A (zh) * 2016-04-27 2016-07-13 浙江理工大学 一种织机纯气动折入边设备测试装置

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001234451A (ja) * 2000-02-22 2001-08-31 Tsudakoma Corp 織機における耳形成装置の駆動方法及び装置
DE10224078A1 (de) * 2002-05-31 2003-12-18 Dornier Gmbh Lindauer Verfahren zum Gestreckthalten eines Schussfadens und Webmaschine zur Verfahrensdurchführung
US7048011B2 (en) * 2003-09-10 2006-05-23 Printing Research, Inc. Printing press cylinder flexible jacket covering
DE102006025265A1 (de) * 2006-05-31 2007-12-06 Lindauer Dornier Gmbh Verfahren und Vorrichtung zum Bilden einer Gewebekante an einer Greiferwebmaschine
DE102012208158B3 (de) * 2012-05-15 2013-09-05 Lindauer Dornier Gmbh Luftdüsenwebmaschine mit einer Vorrichtung zur Druckluftversorgung
JP7077968B2 (ja) * 2019-01-14 2022-05-31 株式会社豊田自動織機 エアジェット織機の緯糸処理装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1000904A4 (nl) * 1987-09-04 1989-05-09 Picanol Nv Werkwijze voor het losmaken van foutieve inslagdraden bij weefmachines en inrichting die deze werkwijze toepast.
EP0322576A1 (fr) * 1987-12-29 1989-07-05 Zvs Vyzkumnevyvojovy Ustav Koncernova Ucelova Organizace Méthode pour dégager et réparer des fils de trame mal insérés dans la trame de métiers à tuyère
EP0344076A1 (fr) * 1988-05-25 1989-11-29 S.A. Saurer Diederichs Dispositif pour l'extraction d'un fil de trame défectueux, sur une machine à tisser
EP0534541A1 (fr) * 1991-09-18 1993-03-31 SOMET SOCIETA' MECCANICA TESSILE S.p.A. Procédé pour retirer automatiquement un fil de trame cassé de la foule sur un métier à tisser à jet d'air et dispositif pneumomécanique utilisé dans ce procédé
EP0575990A1 (fr) * 1992-06-26 1993-12-29 Tsudakoma Kogyo Kabushiki Kaisha Méthode pour éloigner un fil de trame cassé

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0291744A3 (fr) * 1987-05-19 1991-08-07 Zvs Vyzkumnevyvojovy Ustav Koncernova Ucelova Organizace Dispositif pour la formation de lisières du type à fil rentré dans les métiers à tisser
JP2561084Y2 (ja) * 1990-06-22 1998-01-28 株式会社豊田自動織機製作所 ジェットルームにおける緯糸処理装置
DE4213754C1 (de) * 1992-04-25 1993-12-02 Dornier Gmbh Lindauer Einrichtung zum pneumatischen Führen turbulenter Schußfadenenden einer Hilfsgewebeleiste in Luftdüsenwebmaschinen
DE4443899C1 (de) * 1994-12-09 1995-11-23 Dornier Gmbh Lindauer Webmaschine mit einer Kombination aus Schneidvorrichtung und Einleger

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1000904A4 (nl) * 1987-09-04 1989-05-09 Picanol Nv Werkwijze voor het losmaken van foutieve inslagdraden bij weefmachines en inrichting die deze werkwijze toepast.
EP0322576A1 (fr) * 1987-12-29 1989-07-05 Zvs Vyzkumnevyvojovy Ustav Koncernova Ucelova Organizace Méthode pour dégager et réparer des fils de trame mal insérés dans la trame de métiers à tuyère
EP0344076A1 (fr) * 1988-05-25 1989-11-29 S.A. Saurer Diederichs Dispositif pour l'extraction d'un fil de trame défectueux, sur une machine à tisser
EP0534541A1 (fr) * 1991-09-18 1993-03-31 SOMET SOCIETA' MECCANICA TESSILE S.p.A. Procédé pour retirer automatiquement un fil de trame cassé de la foule sur un métier à tisser à jet d'air et dispositif pneumomécanique utilisé dans ce procédé
EP0575990A1 (fr) * 1992-06-26 1993-12-29 Tsudakoma Kogyo Kabushiki Kaisha Méthode pour éloigner un fil de trame cassé

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105758660A (zh) * 2016-04-27 2016-07-13 浙江理工大学 一种织机纯气动折入边设备测试装置
CN105758660B (zh) * 2016-04-27 2018-01-05 浙江理工大学 一种织机纯气动折入边设备测试装置

Also Published As

Publication number Publication date
JP2000212860A (ja) 2000-08-02
US6129123A (en) 2000-10-10
DE19833079C2 (de) 2001-03-15
DE19833079A1 (de) 2000-02-03

Similar Documents

Publication Publication Date Title
DE3319059C2 (fr)
DE3342398C2 (fr)
DE2845299C2 (de) Schützenlose Greifer-Webmaschine
DE2700119C2 (de) Düsenwebmaschine
EP0778364A2 (fr) Procédé et métier à tisser pour la manipulation d'un fil de trame
DE2741859C2 (de) Pneumatische Webmaschine sowie Schußeintragsvorrichtung dafür
DE4209686C2 (de) Verfahren und Vorrichtung zur Herstellung von insbesondere knotenfreien Gewebe auf Luftdüsenwebmaschinen
EP1508633B1 (fr) Métier à tisser à jet
DE19833079C2 (de) Verfahren zum Beheben eines Schußfehlers auf Luftdüsenwebmaschinen mit pneumatischen Einlegern
DE3130989C2 (fr)
EP0462926A1 (fr) Extraction de fils de trame cassés sur métiers à tisser sans navette
EP0022226B1 (fr) Métier à tisser à buses
EP1264921B1 (fr) Dispositif de retenue des extrémités de fils de trâme dans un métier à tisser à jet d'air
DE4213754C1 (de) Einrichtung zum pneumatischen Führen turbulenter Schußfadenenden einer Hilfsgewebeleiste in Luftdüsenwebmaschinen
EP0527972B1 (fr) Metier a tisser a lance
DE102021207297B3 (de) Verfahren zum Entfernen eines fehlerhaft eingetragenen Schussfadens sowie Luftdüsenwebmaschine
EP0458736A1 (fr) Extraction de fil de trame cassé sur métiers à tisser à projectiles
EP1899516B1 (fr) Procede et dispositif pour maintenir un fil de trame introduit dans un metier apres sa mise en marche, notamment dans un metier a jet d'air
EP1512782B1 (fr) Métier à tisser avec un dispositif de rentrage de fils de trame
EP1365053B1 (fr) Dispositif de réception et de retention pour l'extrémité du fil de trame dans un métier à tisser
EP1786963B1 (fr) Procede pour serrer des fils de trame, dispositif de serrage et metier a tisser pourvu d'au moins un dispositif de serrage de fils de trame
DE2341234A1 (de) Webmaschine
EP1927691B1 (fr) Dispositif et procédé de maintien de trame pour un métier à tisser à pince
EP0937799B1 (fr) Métier à tisser, en particulier avec insertion pneumatique de la trame
EP0187181B1 (fr) Métier à tisser

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR GB IT LI PT

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 20000515

AKX Designation fees paid

Free format text: AT BE CH DE ES FR GB IT LI PT

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 20020517

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 20021114