US3822541A - Open end spinning apparatus - Google Patents

Open end spinning apparatus Download PDF

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Publication number
US3822541A
US3822541A US00322980A US32298073A US3822541A US 3822541 A US3822541 A US 3822541A US 00322980 A US00322980 A US 00322980A US 32298073 A US32298073 A US 32298073A US 3822541 A US3822541 A US 3822541A
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US
United States
Prior art keywords
groove
rotor
wall portion
base portion
axis
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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
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US00322980A
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English (en)
Inventor
F Croasdale
R Evans
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Hollingsworth UK Ltd
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Platt International Ltd
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Assigned to HOLLINGSWORTH (UK) LIMITED, SCAITCLIFFE ST., ACCRINGTON, LANCASHIRE ENGLAND, AN ENGLISH COMPANY reassignment HOLLINGSWORTH (UK) LIMITED, SCAITCLIFFE ST., ACCRINGTON, LANCASHIRE ENGLAND, AN ENGLISH COMPANY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: PLATT SACO LOWELL LIMITED,
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • D01H4/04—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 imparting twist by contact of fibres with a running surface
    • D01H4/08—Rotor spinning, i.e. the running surface being provided by a rotor
    • D01H4/10—Rotors

Definitions

  • An open end spinning apparatus comprises a hollow spinning rotor which is open at its upper end and closed at its lower end and which has an inner surface free from apertures and concentric with respect to the rotary axis of the rotor, said inner surface of the rotor having a rotor wall portion which extends from the
  • the lower end or base portion of the rotor may lie in a plane at right angles to the rotor axis or partly in such a plane and partly in a frusto-conical plane.
  • the fibre collecting groove may lie above or below said base portionand may be of any of several radial sections.
  • the present invention relates to open-end spinning of textile yarns and more particularly to spinning rotors employed with apparatus for the open-end spinning of textile yarns.
  • fibres in discrete form are fed in an airstream into a rotating spinning rotor and deposited on an inner surface of the rotor, from which they are picked off by a tail end of yarn which is cominuous ly withdrawn from the rotor.
  • the rotors employed with the aforementioned type of open-end spinning apparatus are provided with an inner wall surface which extends from the rim of an open end of the rotor radially outwardly from the rotary axis and downwards to a region of maximum diamits lower end and which has an inner surface free from eter, where a fibre collecting surface is formed on to which the fibres are deposited.
  • the distance between the rotor rim and the fibre collecting surface has hitherto been quite substantial in order to ensure that fibres entering the rotor contact the wall surface and slide to the fibre collecting surface and are not swept to waste by the airstream passing out of the open end of the rotor.
  • Rotors for the aforementioned type of open-end spinning apparatus have also been provided with apertures either at or below the fibre collecting surface in order to create an airstream in which the fibres are transported into the rotor and to exhaust air from within the rotor.
  • the problem of dust end debris deposition on the inner wall surface is not so acute with such rotors since dust and debris are removed from the rotor through the apertures.
  • the presence of apertures poses problems from a technological aspect in that the direction'of the airflow is not consistent with optimum spinning conditions.
  • the apertures tend to become blocked and this disadvantage seriously affects spinning performance and the rotor requires constant maintenance.
  • a large mass rotor is unsatisfactory, since it acts outside the bearing system in which the rotor spindle is supported and this results in a spindle having a lower critical speed of whirl.
  • Rotors provided with'apertures in the'roto'r wall have the apertures and concentric with respect to the rotary axis of the rotor, said inner surface of the rotor having a rotor wall portion which extends from the open upper end of the rotor radially outwardly with respect.
  • the diameter of the groove when measured from the base of the groove in a plane at right angles to the rotary axis of the rotor being at least seven times greater than the height or mean height of said open end above the base of the fibre collecting groove when measured parallel to the axis of the spinning rotor.
  • said diameter of the groove is in the region of 11, 13 or 16 times the said height or mean height of said open end above the base of the fibre collecting groove.
  • the said inner surface of the rotor preferably includes a rotor base portion extending radially or generally radially outwardly from the rotary axis of the rotor to said region of maximum diameter.
  • FIG. 1 is a cross-section through a spinning unit of open-end spinning apparatus in accordance with a first embodiment of the invention
  • FIG. 2 is a cross-section of a portion of the spinning rotor of the unit shown in FIG. 1, drawn to an enlarged scale;
  • FIG. 3 is a cross-section of a spinning rotor of the same cross-sectional profile as the spinning rotor shown in FIG. 1, but of larger diameter, in accordance with a second embodiment of the invention
  • FIGS. 4 & 5 are cross-sections of spinning rotors of spinning units accordance to a third & fourth embodiments of the invention.
  • FIGS. 6 and 7 are crosssections of portions of the rotors shown in FIGS. 4 and 5, drawn to enlarged scale S.
  • a spinning rotor 1 which is open at the top and closed at the bottom, is mounted on one end of a driving shaft 2 suitably supported in bearings (not shown).
  • the driving shaft 2 has a portion 3 of reduced diameter which is received by a centrally bored hole 4 in the spinning rotor l.
  • a recess 5 is formed in the bottom of the spinning rotor l to provide a seating for a washer 6.
  • the spinning rotor 1 is connected to the driving shaft 2 by means of a screw 7 passing through the washer 6 and screwed into driving shaft 2.
  • the length of the bored hole 4 is greater than the length of the reduced diameter portion 3 so that tightening of the screw 7 has the effect of clamping the spinning rotor 1 against a shoulder8 on the driving shaft 2.
  • the spinning rotor 1 is enclosed in a housing 9, which is, in the operation of the unit, connected to a source of suction through a suction duct 10.
  • the housing 9 is provided with a closure member 11 which has a centrally depending cylindrical portion 12 which terminates in the region of the open top of the spinning rotor 1 and preferably slightly below the rotor rim.
  • Mounted in the closure member 11 is a fibre feed duct 13 and a yarn delivery tube 14.
  • the tube 14 is arranged coaxially with the spinning rotor l and terminates within the rotor in the form of a bell-shaped mouth 15. In a throat portion of the mouth a plurality of grooves 16 are provided.
  • the inner surface of the rotor 1 is formed by a rotor upper wall portion 17 which extends from the open end of the rotor 1 radially outwardly from the rotary axis of the rotor and downwardly to aregion of maximum diameter of the inner surface, a localised fibre collecting circumferential groove 18 located at the region of maximum diameter and a rotor base portion which extends from the rotary axis of the rotor 1 over a region 20 in which it is flatand at right angles to the rotary axis of the rotor and then over a region 21 in which it extends, radially outwardly from the rotary axis of the rotor and upwardly to the region of maximum diameter.
  • the base portion comprising regions 20 and 21 forms a shallow dish-shaped base for the interior of the rotor 1.
  • the angle between upper wall 19 and lower wall 22 of the groove 18 to 30 and is made'up of an angle of 20 between the upper wall 19 and a horizontal plane together with an angle of between the lower wall 22 and a horizontal plane.
  • the latter angle does not exceed
  • fibres in discrete form are transported down the fibre feed tube 13 in an airstream derived from suction applied to the suction duct 10 and are deposited in the V-shaped fibre collecting groove 18 where they are compacted to form a ring of fibres. From the groove 18 the fibres are removed by twisting them into a tail end of a spun yarn which is withdrawn through the delivery tube 14 by delivery means (not shown).
  • the diameter D of the groove 18 when measured from base portion 181 of the groove in a plane at right angles to the rotary axis of the rotor is l 1 times greater than the mean height h of the rim of the open end of the rotor 1 above the base portion 181 when measured parallel to the axis of the rotor 1.
  • the rotor does not suffer from the disadvantage encountered with formerly known rotors of dust and debris collecting on the rotor wall portion 17 of the inner surface.
  • the diameter D of the groove 18 measured from the base 181 of the groove is at least seven times the aforementioned height h and it has been found that a spinning rotor having a ratio of diameter D to height h in the region of l l 1 is particularly suitable for performing at high rotor speeds in short staple yarns.
  • the flat region of the rotor base portion lies, as shown, slightly beneath the base 181 of the fibre collecting groove 18.
  • 'd represents the distance between the rim of the open end of the rotor and the flat region 20.
  • the ratio between the height 4 h of the rotor rim above the base 181 of the fibre collecting groove 18 to the distance d lies in the range 1 to 1 and 1 to 1.6.
  • the ratio of height h to distance d is in the region of 1 to 1.4.
  • the combination of features found in the rotor shown in FIGS. 1 and 2 gives rise to a highly advantageous construction.
  • the load on the drive means can be kept to a minimum, the resultant low moment of inertia reducing the starting torque and therefore the power required to accelerate the rotor to high speeds and to decelerate the rotor from these high speeds to rest.
  • the low mass of the rotor ensures a low overhang weight when the rotor shaft is supported in bearings, which is particularly advantageous when the bearings are of the type employing a gaseous medium.
  • the rotor illustrated in FIG. 3 is identical to that illustrated in FIGS. 1 and 2 except in so far that the diameter D is 15 times greater than the height h. It has been found that a rotor of these relative dimensions is particularly suitable for use in the open-endspinning of long staple fibres.
  • the rotor illustrated in FIGS. 4 and 6 are identical to that illustrated in FIGS. 1 and 2 except in so far that the groove 18 of the rotor shown in FIGS. 1 and 2 is replaced by a groove 23 having parallel upper and lower wall portions 24 and 25 and a base portion 26 which lies in a cylindrical surface coaxial with the axis of the rotor.
  • the diameter D of the groove 23 when measured from the base portion 26 of the groove in a plane at right angles to the axis of the rotor is thirteen times greater than the mean height of the rim of the open end of the rotor above the base of the fibre collecting groove when measured parallel to the axis of the rotor 1.
  • the inner surface of the rotor 1 is formed by a rotor wall portion 17, a localized fibre collecting circumferential groove 28 and a rotor base portion 29.
  • the fibre collecting groove 28 has upper and lower wall portions 30 and 31 which converge to a base portion 32.
  • the upper wall portion 30 of the groove 28 forms a continuation of the rotor wall portion 17, the two portions 17 and 30 lying in the same frusto-conical surface.
  • the angle between the upper and lower wall portions 30 and 31 of the groove 28 is 30 as in the embodiments described in FIGS. 1 to 3.
  • the base portion 29 of the rotor l is flat throughout its extent and lies in a plane at right angles to the rotary axis of the rotor 1, thereby producing an abrupt change of slope at its junction with the lower wall portion 31 of the groove 28.
  • the diameter D of the groove 28 when measured from the base of the groove in a plane at right angles to the rotary axis of of the rotor 1 is seven times greater than the height h of the open end of the rotor above the base 32 of the groove 28 when measured parallel to the axis of the rotor 1. It will, of course, be appreciated that in this embodiment of the invention, the ratio between the height h to the distance a' between the open end of the rotor and the base portion 29 lies in a range below 1 1.
  • Open end spinning apparatus comprising a hollow spinning rotor which is open at itsupper end and closed at its lower end and which has an inner surface free from apertures and concentric with respect to the rotary axis of the rotor, said inner surface of the rotor localised fibre collecting circumferential groove, the
  • diameter of the groove when measured from the base of the groove ina plane at right angles to the rotary axis of the rotor being at least eleven times greater than the height of said open upper end above the base of the fibre collecting groove when measured parallel to the axis of the spinning rotor.
  • said groove is formed with a groove base portion, a groove upper wall portion extending to the groove base portion and a groove lower wall portion extending to the groove base portion, wherein the rotor upper wall portion and said groove upper wall portion lie in the same frusto-conical surface and wherein the groove lower wall portion lies in a frusto-conical surface and'extends outwardly and downwardly to the groove base portion.
  • said groove is formed with a groove base portion, a groove upper wall portion extending to the groove base portion and a groove lower wall portion extendingto the groove base portion, the groove upper wall portion and the groove lower wall portion converging to the said groove base portion, and the rotor upper wall portion and the groove upper wall portion lying in different frusto-conical surfaces to produce an abrupt change of slope at the junction thereof.
  • said groove is formed with a groove base portion, a groove upper wall portion extending to the groove base portion and 'a groove lower wall portion'extending to the groove base portion, the groove upper wall portion and the groove lower wall portion converging to the said groove base portion, the rotor base portion in the region of said groove and the groove lower wall portion lying in the same frusto-conical surface and the rotor base portion in the region of the rotor axis lying in a plane at right angles to the rotor axis.
  • said groove is formed with a groove base portion, a groove upper wall portion extending to the groove base portion, the groove base portion lying in a cylindrical surface coaxial with the axis of the rotor and the groove upper and lower wall portions lying in spaced planes at right angles to the rotor axis.
  • said groove is formed with a groove base portion, a groove upper wall portion extending to the groove base portion and a groove lower wall portion extending to the groove base portion, the groove upper wall portion and the groove lower wall portion converging to the said groove base portion, and wherein the angle between the groove upper and lower wall portions is 9.
  • the groove upper wall portion is inclined above and the groove lower wall portion is inclined below a plane at i right angles to the rotary axis of the rotor and passing through the groove base portion, and wherein the angle between the groove lower wall portion and said plane 7 does not exceed 15.
  • Open end spinning apparatus comprising a hollow spinning rotor which is open at its upper end and closed at its lower end and which has an inner surface free from apertures and concentric with respect to the rotary axis of the rotor, said inner surface of the rotor having a rotor wall portion which extends from the open upper end of the rotor radially outwardly with respect to the rotor axis and downwardly to a region of maximum diameter at which region there is formed a localized fibre collecting circumferential groove, the diameter of the groove when measured from the base of the groove in a plane at right angles to the rotary axis of the rotor being at least eleven times greater than the height of said open upper end above the base of the fibre collecting groove when measured parallel to the axis of the spinning rotor and the ratio of the maximum distance between said rotor base portion and the said open end when measured parallel to the axis of the rotor to the said height of the open end above the base of the fibre collecting groove being not greater than 1 1.6.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US00322980A 1972-01-14 1973-01-12 Open end spinning apparatus Expired - Lifetime US3822541A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB190372A GB1410972A (en) 1972-01-14 1972-01-14 Spinning of textile yarns

Publications (1)

Publication Number Publication Date
US3822541A true US3822541A (en) 1974-07-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00322980A Expired - Lifetime US3822541A (en) 1972-01-14 1973-01-12 Open end spinning apparatus

Country Status (8)

Country Link
US (1) US3822541A (enrdf_load_stackoverflow)
JP (1) JPS4880833A (enrdf_load_stackoverflow)
CH (1) CH561296A5 (enrdf_load_stackoverflow)
DE (1) DE2301439A1 (enrdf_load_stackoverflow)
ES (1) ES410530A1 (enrdf_load_stackoverflow)
FR (1) FR2168016B1 (enrdf_load_stackoverflow)
GB (1) GB1410972A (enrdf_load_stackoverflow)
IT (1) IT976794B (enrdf_load_stackoverflow)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3943691A (en) * 1970-10-08 1976-03-16 Platt International Limited Open-end spinning apparatus
US3965661A (en) * 1973-04-21 1976-06-29 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Thread drawoff tube for an open-end spinning unit
US4050235A (en) * 1975-06-28 1977-09-27 Fried. Krupp Gesellschaft Mit Beschrankter Haftung Spinning rotor for open-end spinning unit
US4068456A (en) * 1975-10-04 1978-01-17 Schubert & Salzer Open-end spinning device
DE2910921A1 (de) * 1978-03-20 1979-09-27 Toyoda Automatic Loom Works Rotor einer offenend-spinnmaschine
DE2939325A1 (de) * 1979-09-28 1981-04-02 Schubert & Salzer Maschinenfabrik Ag, 8070 Ingolstadt Aus einem grundkoerper und einem rotorkoerper bestehender offenend-spinnrotor
US4299084A (en) * 1979-05-14 1981-11-10 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Open end rotor for a spinning machine
US4503663A (en) * 1982-04-06 1985-03-12 Schubert & Salzer Open-end spinning rotor
US4576000A (en) * 1983-07-05 1986-03-18 Hans Stahlecker Spinning rotor for an open-end spinning device and process of making same
US4610134A (en) * 1983-12-10 1986-09-09 W. Schlafhorst & Co. Thread draw-off nozzle for an open-end rotor spinning machine
US5175992A (en) * 1990-03-09 1993-01-05 Hans Stahlecker Method for preventing the inoperatability of an open-end spinning rotor
US5526638A (en) * 1993-04-16 1996-06-18 Rieter Ingolstadt Spinnereimaschinenbau Ag Open-end spinning rotor having an improved connection device for the spinning rotor and rotor shaft
US5755087A (en) * 1994-11-18 1998-05-26 Rieter Ingolstadt Spinnereimaschinenbau Ag Open-end rotor spinning device
US6195976B1 (en) * 1999-03-09 2001-03-06 W. Schlafhorst Ag & Co. Spinning rotor for open-end spinning machines

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2903810A1 (de) * 1979-02-01 1980-08-14 Schlafhorst & Co W Offenend-rotor-spinnvorrichtung
DE3303816A1 (de) * 1982-02-05 1983-08-18 Výzkumný ústav bavlnářský, Ustí nad Orlicí Spinnrotor von offenendspinneinheiten

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3440812A (en) * 1966-10-11 1969-04-29 Vyzk Ustav Barlnarsky Method and apparatus for the continuous ringless spinning of yarn from separated staple fibers in a rotating spinning chamber
US3481130A (en) * 1966-11-24 1969-12-02 Vyzk Uslav Bavlnarsky Apparatus for continuous ringless spinning of textile fibers in a rotating spinning chamber in which underpressure is maintained
US3520122A (en) * 1966-09-12 1970-07-14 Tmm Research Ltd Spinning of textile yarns
US3540201A (en) * 1966-11-04 1970-11-17 Toray Industries Method and apparatus for manufacturing yarn from textile fibers
US3640061A (en) * 1968-10-30 1972-02-08 Schubert & Salzer Maschinen Method and apparatus for spinning a fiber band
US3650104A (en) * 1968-07-25 1972-03-21 Tmm Research Ltd Spinning of textile yarns
US3651632A (en) * 1969-04-09 1972-03-28 Tmm Research Ltd Open-end spinning devices
US3696604A (en) * 1970-05-12 1972-10-10 Toyoda Chuo Kenkyusho Kk Centrifugal spinning device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE632762A (enrdf_load_stackoverflow) * 1962-05-25
FR1530181A (fr) * 1966-08-11 1968-06-21 Schubert & Salzer Maschinen Procédé et dispositif pour le nettoyage des cuvettes à filer rotatives utilisable sur les métiers à filer

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3520122A (en) * 1966-09-12 1970-07-14 Tmm Research Ltd Spinning of textile yarns
US3440812A (en) * 1966-10-11 1969-04-29 Vyzk Ustav Barlnarsky Method and apparatus for the continuous ringless spinning of yarn from separated staple fibers in a rotating spinning chamber
US3540201A (en) * 1966-11-04 1970-11-17 Toray Industries Method and apparatus for manufacturing yarn from textile fibers
US3481130A (en) * 1966-11-24 1969-12-02 Vyzk Uslav Bavlnarsky Apparatus for continuous ringless spinning of textile fibers in a rotating spinning chamber in which underpressure is maintained
US3650104A (en) * 1968-07-25 1972-03-21 Tmm Research Ltd Spinning of textile yarns
US3640061A (en) * 1968-10-30 1972-02-08 Schubert & Salzer Maschinen Method and apparatus for spinning a fiber band
US3651632A (en) * 1969-04-09 1972-03-28 Tmm Research Ltd Open-end spinning devices
US3696604A (en) * 1970-05-12 1972-10-10 Toyoda Chuo Kenkyusho Kk Centrifugal spinning device

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3943691A (en) * 1970-10-08 1976-03-16 Platt International Limited Open-end spinning apparatus
US3965661A (en) * 1973-04-21 1976-06-29 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Thread drawoff tube for an open-end spinning unit
US4050235A (en) * 1975-06-28 1977-09-27 Fried. Krupp Gesellschaft Mit Beschrankter Haftung Spinning rotor for open-end spinning unit
US4068456A (en) * 1975-10-04 1978-01-17 Schubert & Salzer Open-end spinning device
DE2910921A1 (de) * 1978-03-20 1979-09-27 Toyoda Automatic Loom Works Rotor einer offenend-spinnmaschine
US4237682A (en) * 1978-03-20 1980-12-09 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Open-end rotor for a spinning machine
US4299084A (en) * 1979-05-14 1981-11-10 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Open end rotor for a spinning machine
DE2939325A1 (de) * 1979-09-28 1981-04-02 Schubert & Salzer Maschinenfabrik Ag, 8070 Ingolstadt Aus einem grundkoerper und einem rotorkoerper bestehender offenend-spinnrotor
US4503663A (en) * 1982-04-06 1985-03-12 Schubert & Salzer Open-end spinning rotor
US4576000A (en) * 1983-07-05 1986-03-18 Hans Stahlecker Spinning rotor for an open-end spinning device and process of making same
US4610134A (en) * 1983-12-10 1986-09-09 W. Schlafhorst & Co. Thread draw-off nozzle for an open-end rotor spinning machine
US5175992A (en) * 1990-03-09 1993-01-05 Hans Stahlecker Method for preventing the inoperatability of an open-end spinning rotor
US5526638A (en) * 1993-04-16 1996-06-18 Rieter Ingolstadt Spinnereimaschinenbau Ag Open-end spinning rotor having an improved connection device for the spinning rotor and rotor shaft
US5755087A (en) * 1994-11-18 1998-05-26 Rieter Ingolstadt Spinnereimaschinenbau Ag Open-end rotor spinning device
US6195976B1 (en) * 1999-03-09 2001-03-06 W. Schlafhorst Ag & Co. Spinning rotor for open-end spinning machines
USRE40759E1 (en) 1999-03-09 2009-06-23 Oerlikon Textile Gmbh & Co. Kg Spinning rotor for open-end spinning machines

Also Published As

Publication number Publication date
FR2168016B1 (enrdf_load_stackoverflow) 1976-04-09
IT976794B (it) 1974-09-10
JPS4880833A (enrdf_load_stackoverflow) 1973-10-29
GB1410972A (en) 1975-10-22
CH561296A5 (enrdf_load_stackoverflow) 1975-04-30
ES410530A1 (es) 1975-12-16
FR2168016A1 (enrdf_load_stackoverflow) 1973-08-24
DE2301439A1 (de) 1973-07-19

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AS Assignment

Owner name: HOLLINGSWORTH (UK) LIMITED, SCAITCLIFFE ST., ACCRI

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:PLATT SACO LOWELL LIMITED,;REEL/FRAME:004198/0296

Effective date: 19830801