US3812667A - Ringless spinning of separated staple fibres - Google Patents

Ringless spinning of separated staple fibres Download PDF

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Publication number
US3812667A
US3812667A US00231833A US23183372A US3812667A US 3812667 A US3812667 A US 3812667A US 00231833 A US00231833 A US 00231833A US 23183372 A US23183372 A US 23183372A US 3812667 A US3812667 A US 3812667A
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United States
Prior art keywords
wall
chamber
draw
sliver
drop
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Expired - Lifetime
Application number
US00231833A
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English (en)
Inventor
M Marsalek
J Junek
F Hortlik
J Ripka
V Brynda
F Burysek
J Lanta
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.)
Vyzkumny Ustav Bavlnarsky AS
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Vyzkumny Ustav Bavlnarsky AS
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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

  • the sliver is withdrawn from the chamber during rotation in such a manner that it will initially move along an inner surface of the chamber to be imparted 1' twist by friction with respect to the surface, and thereupon along the axis of rotation of the chamber to be imparted additional twist due to the rotationof the chamber with'reference to the portion of the sliver which is being withdrawn and thus becomes converted intoa yarn.
  • the sliver is produced in the aforementioned annular groove which is located at the largest inner diameter of the spinning chamber'and is defined by tapered walls.
  • the sliver thus formed in this groove has the cross-sectional configuration of a common triangle and, it will be understood, is produced in the groove also known as the collecting surface by the incoming fibers due to their gradual deposition at the apex of the longer side of the triangle. It has been found, however,
  • the yarn produced by twisting the sliver is discharged at the same side in the aforementioned proposals, at which the fibers are fed into the spinning chamber. As a result of this the yarn comes into contact with the newly arriving incoming fibers and this causes a deterioration of its surface structure.
  • the sliver being converted into yarn is drawn off the collecting surface in radial direction, very quickly after the sliver is formed thereon, and it has 2, been observed that this does not favorably influence the production of yarn which should utilize a natural twisting tendency of the sliver resulting from existing low axial tension and'in the region of yarn formation. This means that the sliver is twisted more or less by force rather than by its natural tendency.
  • An additional object of the invention is to provide such a method in which a reliable transfer of the twisting moment from the yarn that is from the portion of the sliver which is already being twisted into a yarn into the as yet untwisted sliver, is achieved while eliminating contact of the yarn with newly incoming fibers which are being supplied for deposition and adherence to the sliver.
  • An additional object is to provide an apparatus for carrying out the present method.
  • one feature of the invention resides in a mehtod-of ringless spinning of separated staple fibers which, briefly stated, comprises the steps of providing a rotary spinning chamber having an inner circumference formed "with an annular yarnforming recess surroundingthe axis of rotation of the chamber. Separated staple fibers are admitted into the rotating spinning chamber and there is formed of them in the aforementioned recess a sliver having a cross section of a triangle a shorter and a longer side of which have a ratio of between l 1.5 and l 5.
  • the sliver thus formed is withdrawn during rotation of the spinning chamber, initially along an inner surface of the chamber and thereupon along the axis of rotation thereof, so that during such withdrawing the sliver becomes twisted due to its rotation with the chamber relative to the section being withdrawn, as well as due to friction with thesurface and thus becomes converted into a yarn.
  • the length of the section representing the projection of the length into the axial section of the chamber over which length the sliver is twisted, fed and transformed into yarn on the draw-ofi wall, compared with the length of the longer side of the triangle constituting the cross-section of the sliver, should have advantageously a ratio of between l 2 and 4 I. r
  • the distance of the point or region where the yarn leaves the draw-off wall to a plane passing transverse to the axis of rotation of the chamber through the juncture or transition between the drop wall and the drawoff wall advantageously equals between 1 and 5 times the longer side of the triangular cross-section of the sliver, and the yarn advantageously will leave the drawoff wall at a distance of between I and 7 mm., from the margin of the sliver at the draw-off wall.
  • the spinning chamber for carrying out the novel method may, according to one embodiment and stated briefly, comprise a cupshaped rotary chamber having an open side and an axially spaced closed side, both extending in planes transverse to the axis of rotation of the chamber.
  • An inner circumferential slip wall is provided in the chamber extending and diverging from the open toward the closed side for slipping of fibers deposited thereon under the influence of centrifugal force.
  • a drop wall extends from the slip wall towards the closed side and diverges further in the direction thereof, and a draw-off wall extends from the drop wall to the'closed side and convergesin the direction thereof.
  • a plane normal to the axis of rotation and passing through the transistion between the 'drop wall and the draw-off wall will include with the drop wall an anglein the range between substantially 40 and 70, whereas with the draw-off wall it will iniiidififigie within and 20.
  • thelength of the drop wall will have a ratio with respect to the length of the draw-off wall of l H to l :8.
  • transition from the drop wall to the draw-off wall will in axial direction of the rotary spinning chamber and advantageously have a radius amounting to 0.! to 1.8 mm.
  • a withdrawal tube which extends through the closed end of the spinning chamber from the interior to the exterior thereof and through which the twisted yarn is withdrawn axially of the spinning chamber, with this withdrawing tube or discharge tube advantageously being adjustable in the direction of rotation of the spinning chamber.
  • the sliver instead of having to be twisted under considerable application of force, will simply be rolled together with a much smaller force requirement.
  • the cross section of the sliver is optimum with respect to the direction of the drawing-off of twisted yarn, and thus the requirement for the yarn twisting moment can be reduced while improving the transition of twist into the sliver on the collecting surface of the spinning chamber. This helps to reduce the number of yarn twists and, in consequence, improves the productivity of the'apparatus.
  • the cleaning of the collecting surface from accumulating impurities is quite easy especially in view of the fact that particles and impurities do not tend to adhere to it and at most will do so only very sparsely.
  • FIG. I is an axial section through a spinning chamber according to the present invention:
  • FIG. 2 is a fragmentary axial section of the spinning chamber in FIG. I,on an enlarged scale showing the sliver formed therein in cross-section;
  • FIG. 3 is a view similar to FIG. 2, but illustrating the rolling of the sliver into yarn by twisting
  • FIG. 4 is a view of a portion of the developed walls of the interior of the spinning chamber, and showing the rolling of the sliver into yarn;
  • FIG. 5 is a view similar to FIG. 4,'illustrating one embodiment of the inclination of the drop wall
  • FIG. 5a is a view similar to FIG. 5 illustrating a further embodiment of the inclination of the drop wall
  • FIG. 6 is a view similar to FIG. 5, but illustrating one embodiment of the inclination of the draw-off wall
  • FIG. 6a is a view similar to FIG. 6 and illustrating a further embodiment of the inclination of the draw-off wall.
  • FIG. 7 is an axial sectional view taken on a plane normal to the plane of FIG. I.
  • the spinning chamber 1 is provided with a circumferentially extending slip wall 13 which diverges towards the closed side 16 and merges into a drop wall 14 that diverges further in the direction towards the closed side 16 and at a greater angle than the slip wall 13.
  • the drop wall 14 in turn merges with the draw-off wall 15 which extends to the closed side 16 and converges also in the direction towards the same.
  • a stationary outlet tube 23 extends into the shank 11 and has an end which projects into the cavity of the spinning chamber 1, being provided with an inlet opening 230 through which yarn is withdrawn from the spinning chamber.
  • the opposite outer end of the tube 23 extends beyond the shank and is secured to the stationary part 2 of the machine, advantageously being adjustable in the direction of rotation of the spinning chamber.
  • a removable cover 3 is provided which overllies and closes the intake opening 12 of the spinning chamber 1, but in such a way as not to contact the latter, because the cover is stationary.
  • the cover 3 may form a part of a non-illustrated separating'device for separating fibers supplied to it, and such a device is knownper se to those skilled in the art.
  • the plane 18 passing in direction normal to the axis of rotation of the spinning chamber through the transition from the drop wall 14 to the draw-off wall 15, will include with the latter or rather that the general plane of the latter an angle A ranging between substantially 40 and 70, as illustrated in FIGS. 6 and 6a.
  • lt is further advantageous for the general plane of the drop wall 14 to include with thesame plane 18 mentioned above an angle B which is within the range of- 30 (FIG. 5) and (FIG. 5a).
  • the ratio of the length ofthe wall 14 to the length of the wall 15 is within the range of l :l.landl:8.
  • the radiusR of the transition between the wall 14 and the wall 15 is between 0.1 and L8 mm.
  • the cover 3 is provided with a channel 31 so oriented with respect to the slip wall 15 as to deposit incoming fibers thereon, the fibers being identified with reference numeral 6.
  • a pair of withdrawing rollers 41 and 42 are arranged downstream of the tube 23, at least one of these rollers being driven so that they can withdraw the finished yarn from the interior of the chamber through the tube 23.
  • the chamber 1 can be operated without any means for producing negative or underpressure in its interior as illustrated, rather it can be provided with such means both approaches being already known from the art.
  • Such negative pressure can be produced by forming the wall of the spinning chamber eithe with openings through which air is ejected centrifugally during rotation or by connecting the interior of the spinning chamber with an external source of underpressure.
  • the separated fibers 6 are supplied to the interior of the chamber 1 via the channel 31 from the non-illustrated known separating unit, for instance by being carried along in a stream of air. They become deposited on the slip wall 13 and due to the effective centrifugal force they will slip along the wall l3'(hence the term slip wall) to the drop wall l4.-At the drop wall they will fall and will become deposited onto the collecting surface formed by a part of the drop wall 14 and a part of the draw-off wall 15. On this collecting surface, the fibers will form a sliver 61 within the circumferential region of the collecting surface over which the sliver 61 is in contact with the walls 14 and 15. it will be appreciated that the drop wall 15 in particular is of essential importancefor formation of a sufficiently narrow sliver 61 which latter is produced by deposition of the fibers 6 which become in effect superimposed on one another and adhere together.
  • the sliver 61 forming on the collecting surface has a cross-section which at least approximates the shape of a triangle the shorter side a of which, in contact with the drop wall 14, will preferably have a ratio of l 1.] to l 5 with respect to the longer ide b which is in contact with the draw-off wall 15.
  • the sliver 61 becomes converted into yarn 62, and in particular it is rolled up to form this yarn in such a way that the sliver is guided over a certain distance d along the wall 15 under the effect of centrifugal force.
  • the frictional force thus generated between the wall 15 and sliver 61 which is being rolled together, exerts an additional twisting moment during therelative movement of sliver and wall 15, helping the sliver 61 to'roll together and form the yarn 62.
  • the yarn 62 will bend at point B in the direction towards the opening 230 through which it is discharged from the chamber 1.
  • the yarn 62 has the form of a space curve from the point of its formation to the opening 230.
  • the speed U of the yarn 62 exceeds the rotational speed of the spinning chamber 1 in the direction S.
  • the relative speed of the spinning chamber 1 with respect to the yarn 62 being formed can, in consequence, be determined.
  • the yarn 62 is pressed against the rotating wall 15 under the effect of centrifugal force up to the point P.
  • the relative speedof the spinning chamber 1 with respect to the yarn 62 diminishes along with the increasing distance from the collecting surface towards the axis of rotation. To insure optimum conditions of the spinning process it is therefore appropriate to maintain the distance of the last point of contact P of the yarn 62 with the wall 15, from the plane 18 within the limits of between 1 and 4 times the length of the longer side b of the triangular cross section of the sliver.
  • the converted yarn 62 is drawn off from the chamber 1 through the outlet tube 23 by the rollers 41 and 42 and is then wound up by a non-illustrated winding mechanism, which forms no part of the invention and is known per se.
  • the length of the section M (see FIG. 7), as the axial section projection of the length d over which the sliver 61 isrolled, guided and converted into yarn 62 on the draw-off wall 15, advantageously will have a ratio'of between 1': 2 and 4 l, relative to the length of the longer side b of the triangular cross section of the sliver 61-
  • the yarn 62 should desirably leave the wall within a distance of between substantially 2 and 7 mm. from the edge or margin of the sliver 61 at the draw-off wall 15, and the shape of the draw-off wall 15, as seen in axial direction of the spinning chamber 1, may be convex, concave, direct, broken or it may be a combination of these configurations.
  • a method of ringless spinning of separated staple fibers comprising the steps of providing a rotary negative pressure spinning chamber having an axial inlet end and an opposite axial outlet end and an.
  • a rotary spining chamber for ringlessspinning of separated staple fibers comprising a cup shapedioYary chamber having an open side and an axially spaced closed side provided with an outlet, both of said sides extending in planes transverse to the axis of rotation of said chamber; an inner circumferential slip wall extending and diverging from said open side radially outwardly and toward said closed side for slipping of fibers deposited thereon under the influence of centrifugal force; a drop wall extending from said slip wall towards said closed side and diverging further radially outwardly and in the direction of said closed side and a draw-off wall forming a junction with said drop wall afiaeneaaing from said'drop w all iasai'a cl osedside and converging in the direction thereof, said draw-off wall defining with said drop wall a sliver-forming groove having a crosssection resembling a triangle the shortest and a longer side of which have a ratio
  • annular recess being bounded by a drop wall and a draw-off wall which are mutually inclined at said ratio.
  • a rotary spinning chamber as defined in claim 2 wherein an imaginary plane normal to the axis of rotation of said spinning chamber and passing through the junction of said drop wall and draw-off wall defines with the general plane of the former wall an angle of between 30 and 20, and with the general plane of the latter wall an angle of between 40 and 9.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US00231833A 1971-03-05 1972-03-06 Ringless spinning of separated staple fibres Expired - Lifetime US3812667A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS1650A CS160258B1 (de) 1971-03-05 1971-03-05

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US (1) US3812667A (de)
JP (1) JPS5439511B1 (de)
CH (1) CH539136A (de)
CS (1) CS160258B1 (de)
DD (1) DD95339A5 (de)
DE (1) DE2209199B2 (de)
FR (1) FR2128623B1 (de)
GB (1) GB1374536A (de)
IT (1) IT949827B (de)
SU (1) SU452634A1 (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3924398A (en) * 1973-10-24 1975-12-09 Vyzk Ustav Bavlnarsky Method of and apparatus for open end spinning from staple fibers
US3943691A (en) * 1970-10-08 1976-03-16 Platt International Limited Open-end spinning apparatus
US3948031A (en) * 1973-07-02 1976-04-06 Instytut Wlokiennictwa Duct for feeding fibers to a pneumatic spinning chamber having a stationary whirl
US4050235A (en) * 1975-06-28 1977-09-27 Fried. Krupp Gesellschaft Mit Beschrankter Haftung Spinning rotor for open-end spinning unit
US4058964A (en) * 1975-04-11 1977-11-22 Rieter Machine Works, Ltd. Open-end rotor for a spinning machine
US4078370A (en) * 1975-11-13 1978-03-14 Fried. Krupp Gesellschaft Mit Beschrankter Haftung Rotor for open-end spinning
DE2910921A1 (de) * 1978-03-20 1979-09-27 Toyoda Automatic Loom Works Rotor einer offenend-spinnmaschine
US4299084A (en) * 1979-05-14 1981-11-10 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Open end rotor for a spinning machine
CN100999842B (zh) * 2006-01-10 2012-09-05 吕特英格纺织机械制造股份公司 带可驱动转杯的转杯纺纱装置
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 (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2544503A1 (de) * 1975-10-04 1977-04-07 Schubert & Salzer Maschinen Offen-end-spinnvorrichtung
DE2903810A1 (de) * 1979-02-01 1980-08-14 Schlafhorst & Co W Offenend-rotor-spinnvorrichtung
DE3942454A1 (de) * 1989-12-22 1991-06-27 Schlafhorst & Co W Verfahren und einrichtung zum herstellen eines spinnfasergarns
WO2012171835A1 (de) * 2011-06-15 2012-12-20 Trützschler Nonwovens Gmbh Spinnbadwanne
DE102015108797A1 (de) * 2015-06-03 2016-12-08 Maschinenfabrik Rieter Ag Offenendspinnrotor mit einer Rotortasse mit einer Fasersammelrille, einem Rotorboden und eine Faserrutschwand und Offenendspinnvorrichtung mit einem Offenendspinnrotor

Citations (6)

* 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
US3481128A (en) * 1966-08-24 1969-12-02 Schubert & Salzer Maschinen Apparatus for varying spinning characteristics of a rotary chamber spinning machine
US3501905A (en) * 1966-04-26 1970-03-24 Schubert & Salzer Maschinen Sliver spinning method and apparatus
US3520122A (en) * 1966-09-12 1970-07-14 Tmm Research Ltd Spinning of textile yarns
US3523300A (en) * 1966-08-18 1970-08-04 Toray Industries Spinning method and apparatus for manufacturing yarn from textile fibers
US3604194A (en) * 1968-01-30 1971-09-14 Toray Industries Fiber supply method and apparatus in an open-end spinning system utilizing airflow and centrifugal force

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB477259A (en) * 1937-06-05 1937-12-24 Svend Ejnar Berthelsen Improved method and means for the centrifugal spinning of fibrous material
DE1510741A1 (de) * 1964-01-08 1971-07-01 Julius Meimberg Verfahren und Vorrichtung zum Verspinnen von Stapelfasern
GB1200355A (en) * 1966-08-18 1970-07-29 Toray Industries Break spinning method and apparatus
FR1534568A (fr) * 1966-08-24 1968-07-26 Schubert & Salzer Maschinen Dispositif pour le filage d'un ruban de fibres

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3501905A (en) * 1966-04-26 1970-03-24 Schubert & Salzer Maschinen Sliver spinning method and apparatus
US3523300A (en) * 1966-08-18 1970-08-04 Toray Industries Spinning method and apparatus for manufacturing yarn from textile fibers
US3481128A (en) * 1966-08-24 1969-12-02 Schubert & Salzer Maschinen Apparatus for varying spinning characteristics of a rotary chamber spinning machine
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
US3604194A (en) * 1968-01-30 1971-09-14 Toray Industries Fiber supply method and apparatus in an open-end spinning system utilizing airflow and centrifugal force

Cited By (12)

* 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
US3948031A (en) * 1973-07-02 1976-04-06 Instytut Wlokiennictwa Duct for feeding fibers to a pneumatic spinning chamber having a stationary whirl
US3924398A (en) * 1973-10-24 1975-12-09 Vyzk Ustav Bavlnarsky Method of and apparatus for open end spinning from staple fibers
US4058964A (en) * 1975-04-11 1977-11-22 Rieter Machine Works, Ltd. Open-end rotor for a spinning machine
US4050235A (en) * 1975-06-28 1977-09-27 Fried. Krupp Gesellschaft Mit Beschrankter Haftung Spinning rotor for open-end spinning unit
US4078370A (en) * 1975-11-13 1978-03-14 Fried. Krupp Gesellschaft Mit Beschrankter Haftung Rotor for open-end spinning
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
CN100999842B (zh) * 2006-01-10 2012-09-05 吕特英格纺织机械制造股份公司 带可驱动转杯的转杯纺纱装置
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
GB1374536A (en) 1974-11-20
DE2209199B2 (de) 1980-11-27
CS160258B1 (de) 1975-03-28
JPS5439511B1 (de) 1979-11-28
IT949827B (it) 1973-06-11
FR2128623B1 (de) 1975-10-24
CH539136A (de) 1973-07-15
DD95339A5 (de) 1973-01-20
FR2128623A1 (de) 1972-10-20
SU452634A1 (ru) 1974-12-05
DE2209199A1 (de) 1972-09-21

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