EP0321885A1 - Tuyère pneumatique pour fausse torsion - Google Patents

Tuyère pneumatique pour fausse torsion Download PDF

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Publication number
EP0321885A1
EP0321885A1 EP88121141A EP88121141A EP0321885A1 EP 0321885 A1 EP0321885 A1 EP 0321885A1 EP 88121141 A EP88121141 A EP 88121141A EP 88121141 A EP88121141 A EP 88121141A EP 0321885 A1 EP0321885 A1 EP 0321885A1
Authority
EP
European Patent Office
Prior art keywords
swirl
air
wall
yarn
fibers
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Withdrawn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
EP88121141A
Other languages
German (de)
English (en)
Inventor
Herbert Stalder
Robert Ammann
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 Rieter AG
Original Assignee
Maschinenfabrik Rieter 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 Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP0321885A1 publication Critical patent/EP0321885A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/11—Spinning by false-twisting
    • D01H1/115—Spinning by false-twisting using pneumatic means

Definitions

  • the invention relates to a method according to the preamble of the first method claim and an air nozzle according to the preamble of the nozzle claim.
  • a nozzle is from the German design No. 2722319, from European patent application no. 0131170, and also known from German Patent No. 3526514. From these documents it can be seen that such nozzles are used as so-called false twist nozzles in combination with a drafting system, in such a way that the drafting system delivers a sliver that divides the sliver into core fibers and edge fibers.
  • the core fibers are twisted by the twist nozzle or, in the latter prior art, by the second twist nozzle, viewed in the running direction of the yarn, to an incorrectly twisted yarn core, which extends essentially from the twist-generating part of this nozzle up to the exit rollers of the drafting system.
  • the edge fibers are by means of the air inflow channel or in the latter prior art first air nozzle, seen in the direction of the yarn, against the wrongly twisted core and wound around it.
  • These twisted fibers are referred to as wrapping fibers, which wind around the yarn core (with essentially parallel fibers) which has been turned up again after the swirl part of the nozzle and thereby give the yarn the required strength.
  • FIG. 1 shows a swirl nozzle 1 with an inlet channel 2, which forms the inside diameter of a tube, the extension 3 of which protrudes with a length 1 into a cylindrical cavity 4 provided in the swirl nozzle 1. Furthermore, an air injection nozzle 5 merges with the outlet mouth 6 into the cylindrical cavity 4 such that, seen with a view of FIG. 1, the outlet mouth 7 of the inlet channel 2 is lower than the outlet mouth 6 of the air injection nozzle 5. This creates between the cylindrical inner wall 8 of the cavity 4 and the substantially cylindrical outer wall 9 of the tubular extension 3 an annular air duct for the air flow blown through the nozzle 5.
  • the air injection nozzle 5 seen with a view of FIG. 1, is arranged on the one hand at an angle such that the axis of symmetry 10 of the injection nozzle 5 has an imaginary plane 11 which intersects the axis of symmetry 10 and, with a view of FIG. 1, perpendicular to the cutting surface and is to the longitudinal axis of this figure, forms an angle ⁇ and on the other hand, as shown in Fig. 2, opens tangentially into the cavity 4.
  • the air stream that is blown in creates an air layer that runs around the cylindrical inner wall 8 and shifts in the direction of arrow A.
  • the flow direction A creates a negative pressure in the inlet channel 2, according to the jet pump principle, which sucks air through the inlet channel 2 in the direction of the arrow A.
  • the tube extension 3 protruding with the length 1 is missing, and the injection nozzles are mounted in such a way that the crank-like rotating yarn core interferes with the structure of the surrounding air layer, since the outlet opening is periodically covered by the rotating yarn crank, since the inflowing air is not forced to form a circumferential layer of air before it catches the yarn core.
  • the rotating yarn core is wound by winding fibers which, even after the wrongly twisted yarn core has been untwisted, ensure that the core fibers lying essentially in the axial direction of the yarn are held together in order to thereby produce a usable yarn.
  • Such a yarn is, as can be seen from the prior art mentioned, drawn off by a pair of draw-off rollers and fed to a winding device.
  • a so-called helix formation in the yarn which continuously decreases towards the pair of draw-off rollers.
  • an expanding cone 12 is provided after the cylindrical cavity 4 and has a predetermined length (not shown).
  • FIGS. 3 to and 15 show variants of the swirl nozzle according to the invention, which is why the same or essentially the same elements are provided with the same reference numerals or with a decimal place.
  • the dimensions of such elements shown can differ from FIG. To FIG.
  • FIGS. 3 and 4 show an air nozzle 1 according to FIG. 1, but with an inlet duct 20 which is not essentially as in FIG. 1 a cylindrical, but has a shape at least similar to a Venturi tube.
  • the advantage of this "venturi shape” lies in the smaller resistance for the amount of air to be sucked through and also offers the possibility of choosing the narrowest duct cross-section with constant air resistance, in order to create a balloon above the swirl nozzle as required, as seen in FIG. 3 , to prevent. Furthermore, the pipe extension has a mouth edge that is relatively narrow and thus leads to improved airflow and avoids turbulence.
  • FIG. 5 shows a further variant in which a narrowing cone 30, viewed in direction A, is connected to the cylindrical cavity 4.1, by means of which the circumferential air layer blown in through the injection nozzle 5 and formed in the cavity 4.1 is narrowed, as a result of which the speed of rotation thereof circulating air layer is increased, with the advantage that the fibers captured by the air layer circulate at a correspondingly higher speed.
  • Another advantage of this embodiment is that the narrowing of the air layer means that the fibers sucked in through the inlet channel 2 come into contact with the surrounding air layer more quickly.
  • An expanding cone 12.1 is connected to the cone 30 and has the same function as the cone 12 of FIGS. 1 and 3.
  • FIG. 7 shows a variant of FIG. 5, in that a constriction 40 is provided instead of the cone 30, which together with the cone 12.1 connected thereto has a shape similar to the Venturi nozzle principle.
  • the advantage of the shape should be that of the Venturi nozzle, namely to improve the flow resistance of the air flow in the direction of arrow A and to provide a smoother transition from the narrowing cone 40 to the expanding cone 12.1.
  • FIG. 9 shows a further variant of the swirl nozzle of FIG. 1, in that the tubular extension 3 has an annular extension 50 (not shown in section in FIG. 11), which is provided with at least one helical groove 51.
  • the annular extension 50 forms a compressed air space 52 with a height B in the cylindrical cavity 4.
  • the two, for example, provided grooves 51 connect this compressed air space 52 with the part following the annular extension 50, in direction A. seen, the cylindrical cavity 4th
  • the compressed air space 52 can be supplied with compressed air by means of a connecting bore 53.
  • this compressed air flows through the helical grooves 51 into the lower part of the cylindrical cavity 4 and forms a circumferential layer of air through the helical shape of the grooves 51, which also moves in the conveying direction A.
  • one or a plurality of helical grooves can be provided as required.
  • the bore 53 does not necessarily have to open tangentially into the compressed air space 52, as is shown in FIGS. 1 to 8, since the rotation of the air layer is caused by the grooves 51.
  • the compressed air space 52 can also be enlarged as desired in order to reduce the air speed therein and to improve the air distribution in the case of a plurality of grooves 51.
  • FIG. 12 shows a variant of the swirl nozzle of FIG. 9, in that a conically shaped, annular extension 60 is provided instead of the cylindrical, annular extension 50.
  • one or more helical grooves 61 are also provided, which have the same function as the grooves 51 in FIGS. 9 to 11.
  • the extension 60 fits into a narrowing cone 62, which is followed by an expanding cone 63.
  • the tube extension 3 is provided, for example, in an end plate 64 which is tightly connected to the nozzle body 65.
  • the compressed air space 52 is supplied with compressed air by means of the bore 53, which passes through the helical grooves 61 into the narrowing cone 62 and forms a circumferential air layer therein, the speed of which increases with increasing constriction.
  • the widening 60 seen in the direction of conveyance A, can be connected to a narrowing cone 66, the narrowing angle ⁇ of which can be determined empirically. A narrow mouth edge can also be achieved here.
  • tubular extension 3 additionally has a conical extension 70 which extends to the narrowest diameter of the cone 30.
  • the extension 70 also has a narrow mouth edge. This creates an annular space with a conical cross-section.
  • the widening cone 12.1 follows the cone 30
  • the ratio length to diameter of the conical extension 70 or. of the cone 30 can be empirically optimized with regard to the desired acceleration of the air flow.
  • an air injection nozzle 5.1 opens tangentially into the cylindrical cavity 4.1, the angle ⁇ (see FIG. 1) being essentially 0 degrees (not particularly marked in FIG. 14).
  • the compressed air blown in through the air injection nozzle 5.1 is first circulated and secondly accelerated by the narrowing conical ring cross-section 71 in the direction of travel A, so that in the room immediately after the cone 30 or. the cone 70 a umlau air layer is created, which also moves in the conveying direction A.
  • FIGS. 16 and 17 show a possible application of the air nozzle shown in FIGS. 1 and 2, it being mentioned that all swirl nozzles shown in FIGS. 1 to 15 could be used in this example.
  • FIGS. 16 and 17 corresponds to a modification according to the invention of the false twist nozzle shown in German Design No. 2722319 (St. d. T. mentioned at the beginning).
  • the swirl nozzles shown in European patent application No. 0131170 (mentioned at the beginning of St. T.) could also be used.
  • 16 shows a hint of an output roller pair 80 of a drafting system (not shown further) and a false twist nozzle body 81.
  • the false twist nozzle body 81 viewed in the direction of conveyance A, comprises a feed channel 82, the inlet channel 2 with the tubular extension 3 and the cylindrical cavity 4, the air injection nozzle 5 and an expanding cone 12 connected to the cavity 4.
  • the air layer circulating in the cavity 4 sets the yarn core 83 in rotation, as already described in the prior art mentioned, so that a false twist which extends against the pair of output rollers 80 occurs therein.
  • the yarn experiences a helix formation and then the swirl of the yarn core 83.
  • the yarn is then drawn off by a pair of draw-off rollers (not shown) and fed to a winding device (not shown).
  • FIG. 18 shows a further possible application of the swirl nozzles shown with FIGS. 1 to 15.
  • the example shows a false twist nozzle modified according to the invention from German laid-open specification DE 3526514 (St. d. T. mentioned at the beginning).
  • This example shows a pair of output rollers 90 of a drafting system (not shown) and a false swirl nozzle body 91 with a first swirl nozzle area 92 and a second swirl nozzle area 93.
  • the swirl nozzle of the region 93 serves to produce an incorrectly twisted core of yarn which extends in a manner known per se against the pair of output rollers 90, and the swirl nozzle of the region 92 serves in a manner known per se to wind the edge fibers around the incorrectly twisted yarn core.
  • the examples shown are not limited to a single injection nozzle 5, but it goes without saying that a plurality of injection nozzles 5 which are uniform or distributed unevenly on the circumference can be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
EP88121141A 1987-12-18 1988-12-16 Tuyère pneumatique pour fausse torsion Withdrawn EP0321885A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH495087 1987-12-18
CH4950/87 1987-12-18

Publications (1)

Publication Number Publication Date
EP0321885A1 true EP0321885A1 (fr) 1989-06-28

Family

ID=4285351

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88121141A Withdrawn EP0321885A1 (fr) 1987-12-18 1988-12-16 Tuyère pneumatique pour fausse torsion

Country Status (3)

Country Link
US (1) US4934133A (fr)
EP (1) EP0321885A1 (fr)
JP (1) JPH01162829A (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0415295A1 (fr) * 1989-09-01 1991-03-06 Maschinenfabrik Rieter Ag Procédé de filage à fausse torsion et dispositif pour la mise en oeuvre de ce procédé
EP0418694A1 (fr) * 1989-09-22 1991-03-27 Maschinenfabrik Rieter Ag Métier à filer à jet d'air avec une tuyère d'injection et une tuyère de torsion
EP0418693A1 (fr) * 1989-09-21 1991-03-27 Maschinenfabrik Rieter Ag Tuyère d'un métier à filer à jet d'air
EP0489686A1 (fr) * 1990-12-06 1992-06-10 Maschinenfabrik Rieter Ag Tuyère pour la production d'un mouvement hélicoidal dans un métier à filer à jets d'air
US5237810A (en) * 1989-09-01 1993-08-24 Maschinenfabrik Rieter Ag Method and apparatus for false twist spinning
WO1994003662A1 (fr) * 1992-07-31 1994-02-17 Maschinenfabrik Rieter Ag Dispositif de filage d'un ruban de fibres
EP0854214A3 (fr) * 1997-01-16 1999-06-09 Murata Kikai Kabushiki Kaisha Appareil de filage
CN101798717A (zh) * 2010-01-07 2010-08-11 杭州益邦氨纶有限公司 一种氨纶假捻器的校验装置
CH712489A1 (de) * 2016-05-26 2017-11-30 Rieter Ag Maschf Garnbildungselement für eine Vorspinnmaschine sowie damit ausgerüstete Vorspinnmaschine.

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5775079A (en) * 1997-04-21 1998-07-07 American Linc Corporation Apparatus for imparting virtual twist to strand material and method of imparting same
GB9814476D0 (en) * 1998-07-04 1998-09-02 Fibreguide Ltd Yarn treatment jet
JP4005313B2 (ja) * 1999-03-03 2007-11-07 ヘーベルライン ファイバーテクノロジー インコーポレイテツド フィラメント糸を処理する方法と装置並びに前記装置を使用する方法
AU2003215478A1 (en) * 2003-03-28 2004-10-18 Heberlein Fibertechnology, Inc. Texturing nozzle and method for texturing a filament yarn
DE602004016489D1 (de) * 2004-07-28 2008-10-23 Fare Spa Vorrichtung und Verfahren zur Behandlung von synthetischen Garnen

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3490219A (en) * 1966-12-29 1970-01-20 Mitsubishi Rayon Co Super high speed spinning method and apparatus for manufacturing jet bundle yarn
GB2174723A (en) * 1985-05-07 1986-11-12 Npk Textilno Mash Air vortex nozzle for spinning yarn from staple fibres
WO1987003310A1 (fr) * 1985-11-21 1987-06-04 Schubert & Salzer Maschinenfabrik Aktiengesellscha Procede et dispositif de renfilage d'un dispositif a filer pourvu d'un organe tordeur pneumatique

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3425359A (en) * 1966-09-20 1969-02-04 Japan National Railway Apparatus for handling track installations
DE2722319B2 (de) * 1977-01-10 1981-01-15 Toyo Boseki K.K., Osaka (Japan) Vorrichtung zum pneumatischen Falschdrallspinnen
JPS5837259B2 (ja) * 1977-08-02 1983-08-15 株式会社東芝 光通信用ガラスファイバ−の製造方法
JPS5625524A (en) * 1979-08-07 1981-03-11 Nissho Kosan Kk Hinge structure of lid
US4242859A (en) * 1980-01-21 1981-01-06 Lawrence M. Keeler Thread spinning apparatus
US4457130A (en) * 1981-10-13 1984-07-03 Murata Kikai Kabushiki Kaisha Air spinning nozzle unit
DE3301652A1 (de) * 1982-01-20 1983-07-28 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Kariya, Aichi Falschdraht-luftduese
IN161355B (fr) * 1983-07-01 1987-11-14 Rieter Ag Maschf
DE3402460A1 (de) * 1984-01-25 1985-08-01 W. Schlafhorst & Co, 4050 Mönchengladbach Drallgeber
US4569193A (en) * 1984-06-04 1986-02-11 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Apparatus for producing a fasciated yarn
JPS6134234A (ja) * 1984-07-26 1986-02-18 Murata Mach Ltd 空気式紡績装置
JPS6288768A (ja) * 1985-10-11 1987-04-23 Hitachi Ltd テ−プ送り制御方法及び装置
EP0317652B1 (fr) * 1987-11-23 1992-01-22 Toray Industries, Inc. Dispositif d'aspiration pour l'enfilage de fil

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3490219A (en) * 1966-12-29 1970-01-20 Mitsubishi Rayon Co Super high speed spinning method and apparatus for manufacturing jet bundle yarn
GB2174723A (en) * 1985-05-07 1986-11-12 Npk Textilno Mash Air vortex nozzle for spinning yarn from staple fibres
WO1987003310A1 (fr) * 1985-11-21 1987-06-04 Schubert & Salzer Maschinenfabrik Aktiengesellscha Procede et dispositif de renfilage d'un dispositif a filer pourvu d'un organe tordeur pneumatique

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0415295A1 (fr) * 1989-09-01 1991-03-06 Maschinenfabrik Rieter Ag Procédé de filage à fausse torsion et dispositif pour la mise en oeuvre de ce procédé
US5237810A (en) * 1989-09-01 1993-08-24 Maschinenfabrik Rieter Ag Method and apparatus for false twist spinning
EP0418693A1 (fr) * 1989-09-21 1991-03-27 Maschinenfabrik Rieter Ag Tuyère d'un métier à filer à jet d'air
EP0418694A1 (fr) * 1989-09-22 1991-03-27 Maschinenfabrik Rieter Ag Métier à filer à jet d'air avec une tuyère d'injection et une tuyère de torsion
EP0489686A1 (fr) * 1990-12-06 1992-06-10 Maschinenfabrik Rieter Ag Tuyère pour la production d'un mouvement hélicoidal dans un métier à filer à jets d'air
US5230210A (en) * 1990-12-06 1993-07-27 Maschinenfabrick Rieter Ag Nozzle for generating a twist in a jet spinning machine
CH682566A5 (de) * 1990-12-06 1993-10-15 Rieter Ag Maschf Düse zur Drallerzeugung in einer Düsenspinnmaschine.
WO1994003662A1 (fr) * 1992-07-31 1994-02-17 Maschinenfabrik Rieter Ag Dispositif de filage d'un ruban de fibres
EP0854214A3 (fr) * 1997-01-16 1999-06-09 Murata Kikai Kabushiki Kaisha Appareil de filage
CN101798717A (zh) * 2010-01-07 2010-08-11 杭州益邦氨纶有限公司 一种氨纶假捻器的校验装置
CH712489A1 (de) * 2016-05-26 2017-11-30 Rieter Ag Maschf Garnbildungselement für eine Vorspinnmaschine sowie damit ausgerüstete Vorspinnmaschine.
US10900144B2 (en) 2016-05-26 2021-01-26 Maschinenfabrik Rieter Ag Roving-forming element for a roving machine as well as a roving machine equipped therewith

Also Published As

Publication number Publication date
JPH01162829A (ja) 1989-06-27
US4934133A (en) 1990-06-19

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