EP0134375A1 - Dispositif pour faire fonctionner un métier à jet d'air et métier pourvu d'un tel dispositif - Google Patents

Dispositif pour faire fonctionner un métier à jet d'air et métier pourvu d'un tel dispositif Download PDF

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Publication number
EP0134375A1
EP0134375A1 EP83810379A EP83810379A EP0134375A1 EP 0134375 A1 EP0134375 A1 EP 0134375A1 EP 83810379 A EP83810379 A EP 83810379A EP 83810379 A EP83810379 A EP 83810379A EP 0134375 A1 EP0134375 A1 EP 0134375A1
Authority
EP
European Patent Office
Prior art keywords
entry
weft
auxiliary nozzles
auxiliary
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.)
Withdrawn
Application number
EP83810379A
Other languages
German (de)
English (en)
Inventor
Gianni Riboli
Manfred Willam
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.)
Maschinenfabrik Sulzer Rueti AG
Maschinenfabrik Rueti AG
Original Assignee
Maschinenfabrik Sulzer Rueti AG
Maschinenfabrik Rueti AG
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 Maschinenfabrik Sulzer Rueti AG, Maschinenfabrik Rueti AG filed Critical Maschinenfabrik Sulzer Rueti AG
Priority to EP83810379A priority Critical patent/EP0134375A1/fr
Publication of EP0134375A1 publication Critical patent/EP0134375A1/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Withdrawn legal-status Critical Current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
    • D03D47/3026—Air supply systems
    • D03D47/3033—Controlling the air supply
    • D03D47/304—Controlling of the air supply to the auxiliary nozzles

Definitions

  • the invention relates to a method for operating an air jet weaving machine with auxiliary nozzles distributed over the weaving width to form a pressure wave (traveling field) traveling through the shed with the tip of the weft thread to be inserted.
  • the invention further relates to a weaving machine for carrying out the method.
  • An entry method is also known (DE-OS 23 28 135), in which the auxiliary nozzles are successively switched on and off when passing the thread tip, with some auxiliary nozzles remaining switched on until the end of the entry.
  • the weft thread stretched (stretched) at the entry can spring back again before the reed stop occurs. This can result in the inserted weft thread being loosely or looped through the reed. Such loose weft threads create an undesirable appearance of the fabric.
  • the invention has for its object to improve an entry method and an associated machine particularly in this regard.
  • the method according to the invention consists in that at least one auxiliary nozzle blows after the end of the entry.
  • the weaving machine for carrying out the method is characterized by a control device for blowing the auxiliary nozzles after the end of the entry.
  • Air pressure provided on the auxiliary nozzles can be reduced, because it is not necessary to try to keep the weft thread stretched even after the end of the entry by means of high auxiliary nozzle pressure. Rather, this is done by switching on again or by blowing the auxiliary nozzles after the end of the entry.
  • the inserted weft thread is damaged (blown), especially if it consists of numerous fibrils (synthetic yarns).
  • the weft yarn is treated particularly gently.
  • the weaving machine designated as a whole by 31, contains two machine cheeks 32, 33.
  • a goods tree 34 and a reed 35 are arranged in between.
  • the weft 36 is drawn off from a fixed spool 37, passed through a weft brake 38 and blown in from a main entry nozzle 39 located outside the shed (weaving width W).
  • Auxiliary nozzles 1 are arranged over the weaving width W and protrude into the shed during the weft insertion.
  • a suction nozzle 42 is arranged on the catch side 41.
  • the nozzles 39.1 are e.g. Valves 44 controlled by an electronic control device 43 are connected to an air distribution pipe 45 which is fed via an air supply line 46 from a compressed air container (air source) 47.
  • the container 47 is held under pressure by an air compressor, not shown.
  • the associated operating method of the weaving machine 31 shown in FIG. 2 proceeds as follows.
  • the entry of the weft thread 36 begins at r with the opening of the valves 44 belonging to the nozzle 39 and to the first or some first auxiliary nozzles 1 (e.g. first auxiliary nozzle group A, FIG. 2).
  • the auxiliary nozzle groups A - K each blow briefly (duration x) according to FIG. 2, while the thread tip 48 travels through the shed W.
  • the weft thread brake 38 is closed, so that the weft thread 36 is clamped. Now no further thread can be withdrawn from the bobbin 37.
  • the individual auxiliary nozzle groups A - K can e.g. each include four auxiliary nozzles.
  • groups A-C and E-K each have the same number, namely four auxiliary nozzles, while group D more, e.g. includes five auxiliary nozzles.
  • the stop then follows through the reed 35, during which the tensioned weft thread 36 is clamped between the warp threads.
  • the pressure of the auxiliary nozzle groups A - K can advantageously be kept lower during the post-blowing action 52 than between 100 ° and 280 ° during the weft insertion.
  • the pressure of the auxiliary nozzles during the entry can also be kept relatively low, which saves energy and can be achieved with gentle treatment for the weft yarn. This saves air and energy.
  • the post-blowing process h - k is shorter or extends over fewer angular degrees m of the main shaft than the blowing process n of the individual auxiliary nozzle groups A - C, E - K.
  • the auxiliary nozzles are successively switched on individually and switched off again after passing the thread tip 48. Only the last nozzles la remain switched on after switching on until after the end of entry at 280 0 and to k. In any case, auxiliary nozzles blow, but at least one of the auxiliary nozzles 1 after the end of the entry at 280 °, ie after the weft thread 36 has been clamped.
  • the post-blowing duration m in the field 52 can be adapted to the weft material used in the sense that a shorter post-blowing duration or lower post-blowing pressure is used for lighter and sensitive yarns, e.g. 5 bar for entry, 3 bar for blowing.
  • auxiliary nozzles 1b do not blow during the insertion process and are only activated during the post-blowing process, while the other auxiliary nozzles blowing during the entry process remain switched off during the post-blowing process.
  • Some auxiliary nozzles lb are therefore only intended for subsequent blowing for the duration m.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP83810379A 1983-08-24 1983-08-24 Dispositif pour faire fonctionner un métier à jet d'air et métier pourvu d'un tel dispositif Withdrawn EP0134375A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP83810379A EP0134375A1 (fr) 1983-08-24 1983-08-24 Dispositif pour faire fonctionner un métier à jet d'air et métier pourvu d'un tel dispositif

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP83810379A EP0134375A1 (fr) 1983-08-24 1983-08-24 Dispositif pour faire fonctionner un métier à jet d'air et métier pourvu d'un tel dispositif

Publications (1)

Publication Number Publication Date
EP0134375A1 true EP0134375A1 (fr) 1985-03-20

Family

ID=8191562

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83810379A Withdrawn EP0134375A1 (fr) 1983-08-24 1983-08-24 Dispositif pour faire fonctionner un métier à jet d'air et métier pourvu d'un tel dispositif

Country Status (1)

Country Link
EP (1) EP0134375A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4137681A1 (de) * 1990-11-19 1992-05-27 Toyoda Automatic Loom Works Verfahren und vorrichtung zur verhinderung der erzeugung eines schussstreifens in einem duesenwebstuhl
EP0570701A1 (fr) * 1992-05-21 1993-11-24 Lindauer Dornier Gesellschaft M.B.H Méthode d'insertion pneumatique de fil de trame dans un métier à tisser à air

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2328135A1 (de) * 1973-06-02 1974-12-19 Scheffel Walter Verfahren und vorrichtung an webmaschinen, bei denen die schussfaeden durch ein fluidum ins webfach eingetragen werden
DE2051445B2 (fr) * 1969-10-22 1975-04-03 N.V. Machinefabriek L. Te Strake, Deurne (Niederlande)
US4245677A (en) * 1978-02-10 1981-01-20 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Method and apparatus for supplying transport fluid to auxiliary jet nozzles in a jet loom

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2051445B2 (fr) * 1969-10-22 1975-04-03 N.V. Machinefabriek L. Te Strake, Deurne (Niederlande)
DE2328135A1 (de) * 1973-06-02 1974-12-19 Scheffel Walter Verfahren und vorrichtung an webmaschinen, bei denen die schussfaeden durch ein fluidum ins webfach eingetragen werden
US4245677A (en) * 1978-02-10 1981-01-20 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Method and apparatus for supplying transport fluid to auxiliary jet nozzles in a jet loom

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4137681A1 (de) * 1990-11-19 1992-05-27 Toyoda Automatic Loom Works Verfahren und vorrichtung zur verhinderung der erzeugung eines schussstreifens in einem duesenwebstuhl
EP0570701A1 (fr) * 1992-05-21 1993-11-24 Lindauer Dornier Gesellschaft M.B.H Méthode d'insertion pneumatique de fil de trame dans un métier à tisser à air

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

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17P Request for examination filed

Effective date: 19830826

AK Designated contracting states

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

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Designated state(s): CH LI

18W Application withdrawn

Withdrawal date: 19850327

RIN1 Information on inventor provided before grant (corrected)

Inventor name: WILLAM, MANFRED

Inventor name: RIBOLI, GIANNI