EP0121602A1 - Dispositif de fausse-torsion - Google Patents

Dispositif de fausse-torsion Download PDF

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Publication number
EP0121602A1
EP0121602A1 EP83112879A EP83112879A EP0121602A1 EP 0121602 A1 EP0121602 A1 EP 0121602A1 EP 83112879 A EP83112879 A EP 83112879A EP 83112879 A EP83112879 A EP 83112879A EP 0121602 A1 EP0121602 A1 EP 0121602A1
Authority
EP
European Patent Office
Prior art keywords
false twist
expansion space
air
twist unit
unit according
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.)
Granted
Application number
EP83112879A
Other languages
German (de)
English (en)
Other versions
EP0121602B1 (fr
Inventor
Emil Briner
Richard Hieronymi
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
Priority to AT83112879T priority Critical patent/ATE20253T1/de
Publication of EP0121602A1 publication Critical patent/EP0121602A1/fr
Application granted granted Critical
Publication of EP0121602B1 publication Critical patent/EP0121602B1/fr
Expired 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
    • D01H7/00—Spinning or twisting arrangements
    • D01H7/92—Spinning or twisting arrangements for imparting transient twist, i.e. false twist
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
    • D02G1/04—Devices for imparting false twist
    • 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 false twist unit, in particular for false twist p inside, with an intake part comprising a tapered intake channel and a throttle point following in the thread running direction and a swirl sensor adjoining the intake part.
  • a false twist unit of the aforementioned type is known, with which fibers supplied by a drafting device are spun into a yarn.
  • the twister is a pneumatic false twist nozzle, which on the one hand gives the yarn a twist and on the other hand draws air through the intake duct.
  • the disadvantage now is that the amount of air sucked in through the throttle point is insufficient to achieve an air speed that is optimal for the spinning process in the suction channel.
  • the air speed of that air, which is required to suck in edge fibers which are wound around the yarn core in this spinning process, should advantageously at least be higher than the feed speed of the yarn core.
  • a device for false twist spinning in which a suction part arranged by a swirl device, viewed in the thread running direction, is provided with a suction channel and a suction pipe of approximately the same diameter arranged at right angles thereto.
  • Spinning should be understood to mean the introduction of the untwisted fiber sliver emitted by the pair of output rollers into the swirl device during the starting process.
  • the object is achieved in that the intake part further comprises an annular expansion space which is provided in connection with the intake duct and in front of the throttle point, so that the intake duct opens into the expansion space with its narrowest point and that the expansion space also coexists means of an air outlet is connected to a vacuum source.
  • the advantage of the invention can be seen in the fact that the expansion of the air volume after the narrowest point reduces the air speed essentially such that there is practically no disruption of the yarn or The fiber run is created by air currents transverse to the yarn run, so that the piecing is advantageously carried out with active suction.
  • This advantage has an impact on piecing as well as in operation by reducing fiber loss.
  • a false twist unit 1 is connected downstream of an output roller pair 2 of a drafting device (not shown) in the running direction (R) of the yarn 3.
  • the false twist unit 1 comprises an intake part 4, a throttle point 5 and a swirl sensor 6.
  • the throttle point 5 and the swirl sensor 6 essentially correspond to the version described in German specification No. 27 22 319 (equivalent to GB-PS 1578256).
  • the actual spinning process itself is known from the aforementioned design specification. In it is a belt delivered by the pair of output rollers 2 B taken from a tapered intake duct 7 belonging to the intake part 4 and sucked through the throttle point 5 as a result of the suction effect of the swirler 6, and on the one hand set in rotation by the air flow of the swirler and on the other hand conveyed in the thread running direction R '.
  • the rotation creates a false twist in the yarn core of the yarn 3 against the pair of output rollers 2.
  • the wrapping fibers necessary for the finished yarn are sucked in with the air flow of the suction channel 7.
  • annular expansion space 9 is provided, with an air outlet 10, which is connected to a vacuum source 11.
  • the throttle point 5 connects directly to this expansion space 9.
  • the expansion space is dimensioned such that the air emerging through the narrowest point 8 in this expansion space 9 is soothed and extracted in such a way that no significant disturbance or. Drift of the yarn 3 and its wrapping fibers in the direction of the air outlet occurs.
  • FIGS. 2 to 6 and 8, 10 and 12 the elements that are identical to FIG. 1 are identified by the same reference numerals.
  • FIG. 2 shows a false twist unit 1 'corresponding to the false twist unit 1, but additionally with a funnel 12 connected upstream of the throttle point 5 and a purge air inlet 13, which is connected to an adjustable throttle valve 14.
  • the input diameter ser funnel 12 is advantageously larger than the diameter of the narrowest point 8, in order to facilitate threading the sucked-in yarn 3 into the funnel 12.
  • the purge air inlet 13 is advantageously radially opposite the air outlet 10, so that two substantially symmetrical, semicircular air flows are aimed at the air outlet 10, which prevent fiber parts from becoming stuck in the expansion space.
  • the amount of purge air required for this is selected continuously or in stages by means of the adjustable throttle valve 14.
  • the purge air can also be supplied to the expansion space intermittently. Furthermore, the purge air can be drawn in from the spinning area or supplied as compressed air and, if necessary, air-conditioned.
  • 3 shows a false twist unit 1 "corresponding to the false twist unit 1 ', but with an expansion space 9' into which an annular bead 15 forming the funnel 12 protrudes.
  • the advantage of this annular bead is that the two aforementioned air flows strive towards the air outlet 10 in a semi-annular manner and thereby less disruptive air flows directed perpendicular to the thread run can arise, since the air emerging at the narrowest point 8 is essentially circular in the expansion space 9 through an annular air passage cross section 17 resulting between the annular bead 15 and the wall 16 bordering the narrowest point 8 flows.
  • Fig. 4 shows a further variant of a false twist Unit 1 III , in which the air emerging from the narrowest point 8, in comparison to the variant of FIG. 3, is additionally deflected further before it reaches the expansion space 9 II .
  • This deflection results from a conical extension 18 which results in the narrowest point 8, which projects into a funnel 12 and thereby forms a conical annular gap 19.
  • the funnel is at least partially formed by a bead 20 projecting into the expansion space 9. This deflection also reduces, compared to the variant in FIG. 3, the harmful currents crossing the thread course.
  • the false twist unit 1 IV of FIG. 5 corresponds to the variant of FIG. 3 with the difference that the bead 15 projects so far against the wall 16 that an air passage cross section 21 formed therebetween has a smaller area than the narrowest point 8.
  • the difference can be very small, it suffices that the air resistance of the cross section 21 is greater than that of the narrowest point 8.
  • Fig. 6 shows a further embodiment of the variant of FIG. 4, with an expansion space 9 IV which is excessive compared to the expansion space 9 II , in which a tangential air inlet 22 in the region of the bead 20 and a tangential air outlet 23 in which, in the axial direction, the False twist unit seen, the area of the expansion space 9 IV opposite the bead area is provided.
  • Air inlet 22 and air outlet 23 are arranged in such a way that the purging air entering the air inlet 22 strives in a spiral path against the air outlet 23 and thereby additionally sets the air entering through the annular gap 19 in rotation in the same direction as the core yarn.
  • the intake air already experiences a certain rotation through the rotation of the core yarn.
  • This measure has the advantage that it counteracts the tendency of fiber deposits in the expansion spaces 9 I , 9 II , 9 III and 9 IV shown in FIGS. 3-6.
  • FIGS. 8 and 9 Another measure for reducing or avoiding fiber deposits in the expansion space 9 to 9 IV is shown for the expansion space 9 with FIGS. 8 and 9.
  • the measure consists in that, as shown with the false twist unit 1 VI , the expansion space 9 is arranged eccentrically to the yarn axis (not shown) or to the yarn path 3, that even at the point with the smallest amount of air corresponding to the direction of flow, a sufficiently high air speed results to avoid fiber deposits.
  • FIGS. 10 to 13 are intended to show that non-annular expansion spaces can also be used.
  • FIG. 10 respectively. 11 shows a false twist unit 1 VII with a cylindrical expansion space 24 and an air outlet 25 connected to it.
  • the expansion space can also have a square, possibly rectangular or other-cornered cross section.
  • FIG. 13 Another variant is shown in FIG. 13 is provided with the F VIII alschdrallmaschine 1 in which an expansion chamber 26 which, as shown in Fig. 13, has an oval cross-section. An air outlet 27 connected to it serves as a connection piece to a suction unit (not shown).
  • the cross-section can be shaped such that the air inlet cross-section (not shown), which is traversed by the air flowing from the narrowest point 8 into the expansion space 26, in a manner and function is designed, as shown and described with FIGS. 3 to 6.
  • non-annular cross-sections are that they expand the expansion space into the full, i.e. the false twist unit cannot be machined into two parts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Detergent Compositions (AREA)
  • Air Supply (AREA)
EP83112879A 1983-04-12 1983-12-21 Dispositif de fausse-torsion Expired EP0121602B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83112879T ATE20253T1 (de) 1983-04-12 1983-12-21 Falschdralleinheit.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH196183 1983-04-12
CH1961/83 1983-04-12

Publications (2)

Publication Number Publication Date
EP0121602A1 true EP0121602A1 (fr) 1984-10-17
EP0121602B1 EP0121602B1 (fr) 1986-06-04

Family

ID=4222649

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83112879A Expired EP0121602B1 (fr) 1983-04-12 1983-12-21 Dispositif de fausse-torsion

Country Status (7)

Country Link
US (1) US4509322A (fr)
EP (1) EP0121602B1 (fr)
JP (1) JPS59199825A (fr)
KR (1) KR910006404B1 (fr)
AT (1) ATE20253T1 (fr)
DE (1) DE3363972D1 (fr)
IN (1) IN162582B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0174112A1 (fr) * 1984-08-17 1986-03-12 Carding Specialists (Canada) Limited Procédé de traitement d'un ruban de fibres
US4768336A (en) * 1986-10-10 1988-09-06 Fritz Stahlecker Arrangement for pneumatic false-twist spinning
DE3744757A1 (de) * 1987-03-02 1989-01-05 Schubert & Salzer Maschinen Verfahren und vorrichtung zum anspinnen einer mit einem pneumatischen drallorgan arbeitenden spinnvorrichtung
US4858420A (en) * 1986-09-16 1989-08-22 Fritz Stahlecker Pneumatic false-twist spinning process and apparatus
EP0368108A1 (fr) * 1988-11-07 1990-05-16 Maschinenfabrik Rieter Ag Dispositif de fausse torsion pour un métier à filer à jet d'air
EP0375242A2 (fr) * 1988-12-12 1990-06-27 Burlington Industries, Inc. Production de mèche
CH712489A1 (de) * 2016-05-26 2017-11-30 Rieter Ag Maschf Garnbildungselement für eine Vorspinnmaschine sowie damit ausgerüstete Vorspinnmaschine.

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5392588A (en) * 1982-06-07 1995-02-28 Burlington Industries, Inc. Spinning with hollow rotatable shaft and air flow
US4719744A (en) * 1982-06-07 1988-01-19 Burlington Industries, Inc. Vacuum spinning method
US5103626A (en) * 1984-12-03 1992-04-14 Burlington Industries, Inc. Fasciated yarn structure made by vacuum spinning
BG41935A1 (en) * 1985-05-07 1987-09-15 Bakhov Air eddy nozzle for spinning of staple fibre yarn
IN171023B (fr) * 1987-04-29 1992-07-04 Rieter Ag Maschf
US5237810A (en) * 1989-09-01 1993-08-24 Maschinenfabrik Rieter Ag Method and apparatus for false twist spinning
US5775079A (en) * 1997-04-21 1998-07-07 American Linc Corporation Apparatus for imparting virtual twist to strand material and method of imparting same
US6449938B1 (en) 2000-05-24 2002-09-17 Goulston Technologies, Inc. Advanced finish nozzle system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1130339B (de) * 1958-12-12 1962-05-24 Konrad Goetzfried Verfahren und Vorrichtung zum pneumatischen Spinnen eines Fadens
CH615467A5 (en) * 1977-05-17 1980-01-31 Toyo Boseki Process and apparatus for the purely mechanical production of a staple-fibre yarn consisting of natural or synthetic fibres

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU499131B2 (en) * 1974-03-23 1979-04-05 Toray Industries, Inc. Gore yarn
JPS51130334A (en) * 1975-05-06 1976-11-12 Murata Machinery Ltd Apparatus for making spun yarns
JPS52107349A (en) * 1976-03-04 1977-09-08 Murata Machinery Ltd Spun yarn and method of producing same
DE2722319B2 (de) * 1977-01-10 1981-01-15 Toyo Boseki K.K., Osaka (Japan) Vorrichtung zum pneumatischen Falschdrallspinnen
GB1578256A (en) * 1977-05-10 1980-11-05 Toyo Boseki Method and apparatus for false twisting fibres using fluid
JPS5860029A (ja) * 1981-10-07 1983-04-09 Toyoda Autom Loom Works Ltd 仮撚空気ノズル
US4457130A (en) * 1981-10-13 1984-07-03 Murata Kikai Kabushiki Kaisha Air spinning nozzle unit
JPS58104231A (ja) * 1981-12-15 1983-06-21 Toyoda Autom Loom Works Ltd 結束紡績用仮撚ノズル
JPS58115130A (ja) * 1981-12-25 1983-07-08 Toyoda Autom Loom Works Ltd 仮撚ノズル
JPS58115125A (ja) * 1981-12-29 1983-07-08 Toyoda Autom Loom Works Ltd 結束紡績用仮撚ノズル
US4437302A (en) * 1982-01-20 1984-03-20 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho False twisting air nozzle

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1130339B (de) * 1958-12-12 1962-05-24 Konrad Goetzfried Verfahren und Vorrichtung zum pneumatischen Spinnen eines Fadens
CH615467A5 (en) * 1977-05-17 1980-01-31 Toyo Boseki Process and apparatus for the purely mechanical production of a staple-fibre yarn consisting of natural or synthetic fibres

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0174112A1 (fr) * 1984-08-17 1986-03-12 Carding Specialists (Canada) Limited Procédé de traitement d'un ruban de fibres
US4858420A (en) * 1986-09-16 1989-08-22 Fritz Stahlecker Pneumatic false-twist spinning process and apparatus
US4768336A (en) * 1986-10-10 1988-09-06 Fritz Stahlecker Arrangement for pneumatic false-twist spinning
DE3744757A1 (de) * 1987-03-02 1989-01-05 Schubert & Salzer Maschinen Verfahren und vorrichtung zum anspinnen einer mit einem pneumatischen drallorgan arbeitenden spinnvorrichtung
EP0368108A1 (fr) * 1988-11-07 1990-05-16 Maschinenfabrik Rieter Ag Dispositif de fausse torsion pour un métier à filer à jet d'air
EP0375242A2 (fr) * 1988-12-12 1990-06-27 Burlington Industries, Inc. Production de mèche
EP0375242A3 (fr) * 1988-12-12 1990-11-22 Burlington Industries, Inc. Production de mèche
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
JPS59199825A (ja) 1984-11-13
ATE20253T1 (de) 1986-06-15
IN162582B (fr) 1988-06-11
EP0121602B1 (fr) 1986-06-04
JPS618161B2 (fr) 1986-03-12
US4509322A (en) 1985-04-09
KR910006404B1 (ko) 1991-08-21
DE3363972D1 (en) 1986-07-10
KR840008393A (ko) 1984-12-14

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