US3805505A - Thread drawoff tube construction for open end spinning machines - Google Patents

Thread drawoff tube construction for open end spinning machines Download PDF

Info

Publication number
US3805505A
US3805505A US00277367A US27736772A US3805505A US 3805505 A US3805505 A US 3805505A US 00277367 A US00277367 A US 00277367A US 27736772 A US27736772 A US 27736772A US 3805505 A US3805505 A US 3805505A
Authority
US
United States
Prior art keywords
thread
grooves
tube
passage
drawoff
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.)
Expired - Lifetime
Application number
US00277367A
Other languages
English (en)
Inventor
F Schuster
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.)
Rieter Ingolstadt GmbH
Original Assignee
Schubert und Salzer Maschinenfabrik 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 Schubert und Salzer Maschinenfabrik AG filed Critical Schubert und Salzer Maschinenfabrik AG
Application granted granted Critical
Publication of US3805505A publication Critical patent/US3805505A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/40—Removing running yarn from the yarn forming region, e.g. using tubes

Definitions

  • the inner end of the cylindrical passage through the thread drawoff tube flares outwardly toward the fiber collection chamber.
  • the flared portion includes a smooth margin adjacent to the inner tube end and a grooved region spaced from the inner tube end.
  • the grooved region includes equidistantly spaced long 1ongitudinal grooves in the passage surface and intermediate short longitudinal grooves between the divergent end portions of the long grooves.
  • Circumferential grooves in the passage surface intersect the radial plane grooves. In cross section, the grooves have a depth equal to at least one-half of the fulldiameter of the thread being drawn off.
  • the plane of at least one groove sidewall intersects the principal passage surface at an angle between 45 and 90.
  • Another important object is toenable the drawoff speed to be further substantially increased and thereby to increase the spinning performance of the machine.
  • the sidewall of each longitudinal groove over which the thread must roll to climb out of the groove is sloped so that the groove wall angle is greater than 45.
  • FIG. I is a vertical axial section through an open end spinning machine having a drawoff tube constructed in accordance with the present invention.
  • FIG. 2 is a bottom plan of the drawoff tube. 7
  • FIG. 3 is a cross section through a portion of the drawoff tube wall showing one configuration of a passage. groove
  • FIG. '4 isa similar view showing'a modified groove configuration.
  • a housing 1 closed by a cover 11 contains a spinning turbine 2 having a fiber collection trough24. Fiber is fed to such trough from'a sliver S by a fiber supply device, shown as feed rolls 5, and a supplytube 51 extending through the housingcover. The fiber is drawn as a thread F from the collection trough 24 through a drawoff tube 6 by drawoffrollers 3.
  • the thread drawoff tube 6 includes an upper cylindrical passage 63 having a lower end portion 60 flared toward the lower. passage mouth.
  • the internal passage surface of .the flared portion 601 has a smooth margin 600 adjacent to the lower passage mouth and a grooved portion 601 above such smooth margin.
  • the thread F is pulled from the collection trough 24 past the smooth margin 600 to the grooved portion 60l, where the linear travel of the thread stretch engaged with passage portion 601 is momentarily stopped by frictional engagement while the trailing thread end continues to rotate so that a false twist is imparted to the thread.
  • the smooth surface 600 damps the vibrational effect on the thread created by the change in velocity of the thread portion in the passage, so that such vibration is not translated to the thread end in the collection trough, which transmission might result in separation of the thread end from the fiber in the trough.
  • the smooth damping surface is not necessary for spinning long staple fibers.
  • the distribution of false twist along spun thread has been improved by providing a passage portion having longitudinal grooves in the passage surface, usually disposed in radial planes.
  • experiments have shown that the false twist distribution can be further improved by providing longitudinal grooves 7 intersected by circumferential grooves 70.
  • the combination of intersecting longitudinal grooves 7 and circumferential grooves permits the thread drawoff speed to be increased substantially, such increase being as great as 50 per cent, depending on the type of fiber being spun and the rotational speed of the spinning turbine. It is desirable to have the longitudinal grooves approximately equally"spaced,. but, because the lower tube portion is flared, the grooves tend to diverge downwardly. Consequently, shorter longitudinal grooves 71 are provided between the divergent end portions of grooves 7, as shown in FIG. 2.
  • the opposingforce tending to hold the thread in the groove is determined by the groove wall angle or, shown in FIGS. 3 and 4.
  • the groove wall angle is the angle between the outwardly extende'dplane of that groove sidewall over which the thread F rolls out of the-groove and the portion of jsurface 61 adjacent to such wall.
  • Such groove wall angle is the supplement of the groove corner angle over which the thread rollsout of the groove.
  • the optimum force for holding the thread in the groove, and thereby producing a good false twist distribution, is created when the groove wall angle a is greater than 45, and, more particularly, when the angle is between 45 and
  • the groove configuration shown in FIG. 3 is suitable for a spinning machine in which the relative rotation of the drawoff tube 6 and the spinning chamber 2 is always in the same direction, so that the circumferential movement of the thread F within tube 6 will always be in the direction of arrow P.
  • the groove configuration shown in FIG. 4 permits the twisting force to be exerted on the thread in either direction because both groove walls form angles a greater than 45.
  • a drawoff tube having the groove construction. of FIG. 4 can be used in a'spinning machine in which the circumferential rolling force on the thread F is either clockwise or counterclockwise.
  • the grooves can have various cross-sectional shapes and depths, and the spacing between adjacent grooves may be varied, but the critical minimum depth and range of angles a must be observed to produce the most efficient machine operation.
  • the flared tube mouth 60 may also be varied in size and configuration without disadvantageously affecting the performance of the twist-imparting zone 601.
  • the circumferential grooves 70 also may have various cross-sectional profiles, but it is preferred that the depth of such grooves be substantially the same as the depth of the grooves 7 and 71. While the increased effectiveness of the twist zone 601 created by the particular improvements described above has been determined experimentally, it is probable that these results are produced by the increased number of thread contact points which exert a greater holding force on the thread F. Since the degree of twisting restraint is also increased by steep groove walls, it is preferred that the sidewall angle of grooves 70 be greater than 45, which also sharpens the corners formed by the intersections of grooves 70 with grooves 7 and 71.
  • twisting zone formed in accordance with the present invention will effect good binding of the fiber ring in collection trough 24 to the trailing end of thread F even with a very small rotational speed of spinning turbine 2, so that, if desired, spinning can be accomplished at lower speeds than have heretofore been practical.
  • a thread drawoff tube for open end spinning machines said tube having an inner passage wall, such wall having a grooved thread-engaging surface, wherein the improvement comprises a plurality of grooves having their lengths extending longitudinally and spaced circumferentially in the passage wall, and a plurality of longitudinally spaced circumferential grooves intersecting said longitudinal grooves.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Forwarding And Storing Of Filamentary Material (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)
US00277367A 1971-08-11 1972-08-02 Thread drawoff tube construction for open end spinning machines Expired - Lifetime US3805505A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2140157A DE2140157B2 (de) 1971-08-11 1971-08-11 Fadenabzugsrohr für eine Offen-End-Spinnvorrichtung

Publications (1)

Publication Number Publication Date
US3805505A true US3805505A (en) 1974-04-23

Family

ID=5816407

Family Applications (1)

Application Number Title Priority Date Filing Date
US00277367A Expired - Lifetime US3805505A (en) 1971-08-11 1972-08-02 Thread drawoff tube construction for open end spinning machines

Country Status (9)

Country Link
US (1) US3805505A (cg-RX-API-DMAC10.html)
JP (1) JPS4827032A (cg-RX-API-DMAC10.html)
CH (1) CH535294A (cg-RX-API-DMAC10.html)
CS (1) CS167995B2 (cg-RX-API-DMAC10.html)
DE (1) DE2140157B2 (cg-RX-API-DMAC10.html)
ES (1) ES405561A1 (cg-RX-API-DMAC10.html)
FR (1) FR2148503B1 (cg-RX-API-DMAC10.html)
GB (1) GB1365206A (cg-RX-API-DMAC10.html)
IT (1) IT963569B (cg-RX-API-DMAC10.html)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3965661A (en) * 1973-04-21 1976-06-29 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Thread drawoff tube for an open-end spinning unit
US3986332A (en) * 1975-05-21 1976-10-19 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Thread-draw-off guide attached to a spinning rotor of an open-end spinning unit
US4166354A (en) * 1976-10-14 1979-09-04 Societe Alsacienne De Constructions Mecaniques De Mulhouse Freed-fiber spinning devices
US4258541A (en) * 1978-03-28 1981-03-31 Societe Alsacienne De Constructions Mecaniques De Mulhouse Open-end rotor with thread draw-off tube
US4385488A (en) * 1980-03-29 1983-05-31 W. Schlafhorst & Co. Open-end spinning device
US4702069A (en) * 1987-03-09 1987-10-27 Vsesojuzny Nauchnoissledovatelsky Institut Legkogo I Tekstilnogo Mashinostroenia Open-end spinning device
US6347506B1 (en) 1999-02-13 2002-02-19 Felix Backmeister Yarn draw-off nozzle in an open-end spinning machine
US6886322B2 (en) 2003-07-16 2005-05-03 W. Schlafhorst Ag & Co. Yarn withdrawal nozzle
CN100489167C (zh) * 2003-07-11 2009-05-20 W.施拉夫霍斯特公司 纱阻捻头
CN100507105C (zh) * 2003-04-14 2009-07-01 里特机械公司 气流纺纱装置的落纱嘴
US20180320292A1 (en) * 2015-11-06 2018-11-08 Maschinenfabrik Rieter Ag Thread Draw-Off Nozzle having Notches Extending Radially to the Nozzle Bore

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3220402C2 (de) * 1982-05-29 1985-03-21 W. Schlafhorst & Co, 4050 Mönchengladbach Verfahren und Vorrichtung zum Herstellen eines mit einer OE-Rotorspinnmaschine gesponnenen Garns
JPS59203399A (ja) * 1983-05-06 1984-11-17 三菱電機株式会社 マイクロ波放電光源装置
DE10255723B4 (de) * 2002-04-06 2012-06-06 Oerlikon Textile Gmbh & Co. Kg Fadenabzugsdüse
DE10305794B4 (de) * 2003-02-10 2012-01-19 Maschinenfabrik Rieter Ag Garnabzugsdüse für Offenend-Rotorspinnvorrichtungen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2052731A (en) * 1935-07-09 1936-09-01 Du Pont Rayon Co Apparatus for production of artificial thread
US2100595A (en) * 1935-10-31 1937-11-30 American Enka Corp Manufacture of artificial silk
US2940243A (en) * 1958-09-02 1960-06-14 American Enka Corp Spinning funnel
US3481128A (en) * 1966-08-24 1969-12-02 Schubert & Salzer Maschinen Apparatus for varying spinning characteristics of a rotary chamber spinning machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2052731A (en) * 1935-07-09 1936-09-01 Du Pont Rayon Co Apparatus for production of artificial thread
US2100595A (en) * 1935-10-31 1937-11-30 American Enka Corp Manufacture of artificial silk
US2940243A (en) * 1958-09-02 1960-06-14 American Enka Corp Spinning funnel
US3481128A (en) * 1966-08-24 1969-12-02 Schubert & Salzer Maschinen Apparatus for varying spinning characteristics of a rotary chamber spinning machine

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3965661A (en) * 1973-04-21 1976-06-29 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Thread drawoff tube for an open-end spinning unit
US3986332A (en) * 1975-05-21 1976-10-19 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Thread-draw-off guide attached to a spinning rotor of an open-end spinning unit
US4166354A (en) * 1976-10-14 1979-09-04 Societe Alsacienne De Constructions Mecaniques De Mulhouse Freed-fiber spinning devices
US4258541A (en) * 1978-03-28 1981-03-31 Societe Alsacienne De Constructions Mecaniques De Mulhouse Open-end rotor with thread draw-off tube
US4385488A (en) * 1980-03-29 1983-05-31 W. Schlafhorst & Co. Open-end spinning device
US4702069A (en) * 1987-03-09 1987-10-27 Vsesojuzny Nauchnoissledovatelsky Institut Legkogo I Tekstilnogo Mashinostroenia Open-end spinning device
US6347506B1 (en) 1999-02-13 2002-02-19 Felix Backmeister Yarn draw-off nozzle in an open-end spinning machine
CN100507105C (zh) * 2003-04-14 2009-07-01 里特机械公司 气流纺纱装置的落纱嘴
CN100489167C (zh) * 2003-07-11 2009-05-20 W.施拉夫霍斯特公司 纱阻捻头
US6886322B2 (en) 2003-07-16 2005-05-03 W. Schlafhorst Ag & Co. Yarn withdrawal nozzle
US20180320292A1 (en) * 2015-11-06 2018-11-08 Maschinenfabrik Rieter Ag Thread Draw-Off Nozzle having Notches Extending Radially to the Nozzle Bore
US10767284B2 (en) * 2015-11-06 2020-09-08 Maschinenfabrik Rieter Ag Thread draw-off nozzle having notches extending radially to the nozzle bore

Also Published As

Publication number Publication date
FR2148503A1 (cg-RX-API-DMAC10.html) 1973-03-23
DE2140157B2 (de) 1973-11-29
IT963569B (it) 1974-01-21
GB1365206A (en) 1974-08-29
CH535294A (de) 1973-03-31
ES405561A1 (es) 1975-08-01
JPS4827032A (cg-RX-API-DMAC10.html) 1973-04-10
DE2140157A1 (de) 1973-03-01
FR2148503B1 (cg-RX-API-DMAC10.html) 1974-11-08
CS167995B2 (cg-RX-API-DMAC10.html) 1976-05-28

Similar Documents

Publication Publication Date Title
US3805505A (en) Thread drawoff tube construction for open end spinning machines
US4516397A (en) Method and device for increasing the hairiness and the bulkiness of a thread
US3640061A (en) Method and apparatus for spinning a fiber band
US4702069A (en) Open-end spinning device
JPS6290330A (ja) オ−プンエンド紡績用の紡績機
US3965661A (en) Thread drawoff tube for an open-end spinning unit
US4051653A (en) Apparatus for spinning textile fibers
US4068456A (en) Open-end spinning device
US6269623B1 (en) Open-end rotor spinning arrangement
US3851455A (en) Method for manufacturing yarn from natural and chemical fibers and a device for carrying out the method
US3481130A (en) Apparatus for continuous ringless spinning of textile fibers in a rotating spinning chamber in which underpressure is maintained
GB2182069A (en) Draw-off nozzle for roving and spinning frames
US2121647A (en) Ring traveler
US3110150A (en) Yarn spinning machine
US2572135A (en) Apparatus for twisting threads
US3786622A (en) Yarn spinning method and apparatus therefor
US3869852A (en) Method of and apparatus for twisting yarn
US3336742A (en) Yarn twist controlling device
IL25990A (en) Pneumatic device for simulated weaving
US3187496A (en) Centrifugal yarn collection
GB1358810A (en) Open-end spinning method and apparatus adapted for carrying out this method
US3494119A (en) Large diameter double twist spindles employed in the textile industry
JP2598680B2 (ja) オープンエンド精紡機における糸引出し部の構造
US1928679A (en) Spinning frame
US2218224A (en) Art of rope making