US3425205A - Method and apparatus for strand quality control in rotary spinning chambers - Google Patents

Method and apparatus for strand quality control in rotary spinning chambers Download PDF

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Publication number
US3425205A
US3425205A US682944A US3425205DA US3425205A US 3425205 A US3425205 A US 3425205A US 682944 A US682944 A US 682944A US 3425205D A US3425205D A US 3425205DA US 3425205 A US3425205 A US 3425205A
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United States
Prior art keywords
strand
spinning
fiber
chamber
tube
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Expired - Lifetime
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US682944A
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English (en)
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Hans Landwehrkamp
Franz Schreyer
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Rieter Ingolstadt Spinnereimaschinenbau AG
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Schubert und Salzer Maschinenfabrik AG
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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
    • D01H4/48—Piecing arrangements; Control therefor
    • 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
    • D01H4/48—Piecing arrangements; Control therefor
    • D01H4/50—Piecing arrangements; Control therefor for rotor spinning

Definitions

  • a strand end In order to start the spinning operation in rotary spinning chambers, a strand end must be inserted through the strand-withdrawal opening or tube communicating with the spinning chamber until such strand end engages fiber in the fiber collection zone. When the strand end engages such fiber, the fiber is drawn and twisted continually adding to the strand length. A free strand end must be fed to the collection zone after each interruption of the spinning process, Whether resulting from intentional machine shutdown, by a break in the continuous strand or by some other disturbance in the operation causing separation of the strand from fiber in the collection zone. Such return can be eifected in principle in various ways, either manually or automatically.
  • the strand quality in the region of a break or discontinuity is frequently impaired by thick or thin sections, or less uniformly or firmlybound fibers, or by nonuniform twist or some combination of such flaws.
  • a definite length of the free strand end must be returned to the collection channel for restarting the spinning operation to minimize the regions of irregularity in the finished yarn caused by discontinuity in the spinning process.
  • the knotted strand end is usually not in a position to insure immediate contact with fiber.
  • the drawing mechanism is timed to begin withdrawing the strand a predetermined interval after the fiber supply is started so that the strand is withdrawn regardless of whether contact has been made with the fiber. Consequently, false starts in which the strand end is pulled out of the chamber without a continuing strand being formed are not uncommon and it is necessary to feed the strand end back into the spinning chamber. Even if contact is made with the fiber, a tightly knotted or curled strand end may not pick up sufiicient fiber to form a strong bond so that the strand may break easily at the weak location.
  • the torn strand end usually includes flaws, such as abraded regions or fiber lumps or pills. Because broken strand ends are not suitable for restarting the spinning operation, an auxiliary thread or strand may be extended into the spinning chamber and then rolled onto a separate spool after starting.
  • Another important object is to provide a strand end at a predetermined distance from the collection zone prior to resumption of the spinning process and to facilitate thereby such resumption by automatically returning the strand to a precise location relative to the collection zone.
  • FIGURE 1 is a vertical axial section through representative rotary spinning apparatus to which the present invention is particularly applicable.
  • FIGURES 2 and 3 are diametral sections on line 2-2 of FIGURE 1 through the spinning chamber illustrating sequentially one method of severing a strand.
  • FIGURE 4 is an axial section through a strand-withdrawal tube showing strand-cutting mechanism.
  • FIGURE 5 is a fragmentary axial section through a spinning chamber and withdrawal tube illustrating a different type of strand-cutting mechanism.
  • FIGURE 6 is a schematic representation of strand withdrawal and clamping mechanism having cutting mechanism of the type shown in FIGURE 4.
  • FIGURE 1 Shown in FIGURE 1 is a rotary spinning chamber 2 enclosed in a stationary housing 1 having a cover 11. Fiber sliver is fed through rolls 5 and feed tube 51 ex tending through cover 11 into strand-forming chamber 2 to direct the sliver toward the wall of the chamber interior. Fibers separated by a higher rate of velocity of the rolls 5 as of the supply of the sliver S are moved by centrifugal action to the portion of the chamber having the greatest diameter, which portion defines a fiber-collection zone or channel 24. Fibers in the channel form a ring R which is spun into a strand F and then twisted into yarn and the strand is withdrawn through a stationary tube 31 in cover 11 by drawing rolls 3 and then wound onto a bobbin or spool.
  • the spinning chamber is rotated by belt 23 on sheave 22 encircling hollow shaft 21, which shaft is integral with the lower portion of the spinning chamber 2.
  • the pressure in the spinning chamber is predominantly below atmospheric and such low pressure can be created by high speed rotation of the chamber itself, but is preferably created by connecting a suction source 4 to the mouth of hollow shaft 21.
  • a smooth uniform strand end portion is provided by stopping the feed rolls 5 and drawing rolls 3 while maintaining the spinning chamber 2 at its normal rotational speed for an additional interval.
  • the fiber ring R of loose fiber is spun or bound into a continuation of strand F as illustrated in FIGURE 2. Because rolls 3 have stopped, strand F no longer is pulled longitudinally from the chamber so that the same point S of the strand is maintained in contact with collection channel 24 by centrifugal force and, consequently, continues to be twisted at this location.
  • the centrifugal force on the fiber ring and the pressure of the strand against the collection surface prevents such twist from being transmitted to the strand formed in fiber ring, however, so that the strand twist is localized sufficiently to sever the free portion of strand F from the strand portion in ring R at the point of tangency S of the strand with the collection channel. Since the strand is always twisted off at the same point of tangency location the length of the strand F is of definite predetermined length. Also because the finished free strand is severed from the length of spun fiber in the spinning channel, such free strand is of a quality consistent with the previously spun strand, as illustrated in FIGURE 3.
  • the spinning chamber is stopped after the free strand portion is severed from the strand portion in the collection channel and the imperfect strand portion is removed from the collection channel and chamber through hollow shaft 21 and tube 4, for example, or by other cleaning apparatus such as disclosed in our copending application No. 655,906, filed July 25, 1967.
  • clamping mechanism in or adjacent to the withdrawal tube is preferably provided to supplement the restraining force exerted by the suction from source 4 for holding the strand end in the tube. Suitable clamping mechanism is disclosed in copending application Ser. No. 665,118 of Hans Landwehrkamp et al., filed Sept. 1, 1967, and is represented in FIG- URE 6 by clamp 65.
  • the drive for spinning chamber 2 is energized. Because strand F was severed to a length just sufiicient to extend radially of withdrawal tube 31 to collection channel 24 of such chamber, the strand end cannot be held in the channel by centrifugal force created by the rotating chamber without the position of the strand being changed. Consequently, the chamber can rotate indefinitely without affecting such strand end.
  • the sliver feed roll 5 can be actuated to supply a new fiber ring R to channel 24.
  • return mechanism can be actuated to feed the strand back into the chamber a predetermined distance to engage the free strand end with the newly-formed fiber ring for resumption of spinning. The return may be accomplished, for example, by reversing the rotation of drawing rolls 3 a predetermined number of revolutions. Subsequently, the drawing rolls will be energized synchronously to begin withdrawing strand from the chamber.
  • FIGURE 4 a cutting knife 7 is shown which is reciprocable through a slot 32 in the side of withdrawal tube 31. After drawing rolls 3 have been stopped, the knife can be mechanically, pneumatically, hydraulically or electromagnetically projected through the slot and pressed against the diametrically opposite tube wall to sever strand F at point T. Alternatively, an electrically heated filament may be used to cut the strand.
  • FIG URE 5 Another type of cutting arrangement is shown in FIG URE 5.
  • a sleeve 70 encircles withdrawal tube 31 extending through cover 11.
  • the lower end of sleeve 7 is beveled to form an annular knife edge 71 and the sleeve is axially slidable from the full-line position in which the cutting edge 71 is above mouth 33 of tube 31 to the broken-line position in which the knife edge extends below the tube mouth into the spinning chamber.
  • sleeve 70 is slid into the brokenline position so that rotation of the spinning chamber 2 will press the strand against cutting edge 71 to sever it at point T.
  • the severed portion E of the strand within the spinning chamber 2 will be removed from the chamber through hollow shaft 21 and tube 4 as previously described.
  • a cutting implement could be provided at other locations, if desired, such as between the upper end of withdrawal tube 31 and drawing rolls 3, or between drawing rolls 3 and a bobbin or spool onto which finished yarn is wound, provided that suitable mechanism is provided for returning the free strand end a sufiicient distance into the spinning chamber collection channel.
  • return supply mechanism can be synchronized with feed rolls 5, chamber 2 and drawing rolls 3 to move the strand F back into the spinning chamber the proper distance so that resumption of the spinning operation can be effected consistently and automatically.
  • the present method of controlling the quality of the yarn product by providing a strand end of uniform quality for use in resuming a spinning process interrupted intentionally may also be employed when the interruption occurs because of unintentional strand breakage or by some other disturbance. Because such disturbance or breakage occurs at random, rather than at predetermined locations, it is even more important to provide means for cutting the strand to a predetermined length in order to assure reliable restarting of the operation. If, for example, a break in the strand is sensed by a sensor 750, such as shown in FIGURE 6, through a slot 34 in the side of withdrawal tube 37, the drawing rolls 3 can be stopped and clamp 65 actuated to retain the strand in the spinning apparatus.
  • movable guide 8 Such guide can be moved to the right, as seen in FIGURE 6, into alignment with the nip of rolls 3 and axially of tube 31 to permit the strand to drop into the tube. Sensing, clamping and return mechanism of this and alternative types are described in aforementioned Landwehrkamp et al. application Ser. No. 665,118.
  • the strand is severed at a predetermined distance from the collection channel so that the trailing portion of inferior quality is removed and so that automatic mechanism can be provided to return a free strand end to the most advantageous position relative to collection channel 24 to assure reliable resumption of the spinning process.
  • the method and apparatus of the present invention can be applied successfully to all spinning devices having rotating spinning chambers, such as shown in Germ-an Patent 1,111,549, for example.
  • the method of controlling strand quality during interruption and resumption of spinning a continuous strand drawn from a fiber-collection zone to which fiber is continuously fed which comp-rises the steps of severing the continuous strand at a predetermined distance from the fiber-collection zone, removing from the fiber-collection zone the severed strand end portion and fiber clinging thereto, and, in resuming spinning of the continuous strand, moving the continuous strand end a predetermined distance toward the collection zone.
  • the tube has an aperture through a wall thereof, the cutting means being projectable through such tube aperture into engagement with the strand drawn through such tube.
  • the cutting means including a knife projectable through the tube aperture.
  • the cutting means including a heated filament projectable through the tube aperture.
  • the cutting means including a sleeve encircling the tube, having its end adjacent to the fiber-collection zone sharpened and reciprocable relative to the tube between a position in which its sharpened end encircles the tube and a position in which its sharpened end projects beyond the tube end for engagement with the strand portion between the fiber-collection zone and the tube.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US682944A 1966-11-19 1967-11-14 Method and apparatus for strand quality control in rotary spinning chambers Expired - Lifetime US3425205A (en)

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DESC039841 1966-11-19

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US (1) US3425205A (xx)
BE (1) BE706669A (xx)
CH (1) CH457221A (xx)
CS (1) CS159733B2 (xx)
FR (1) FR1544639A (xx)
GB (1) GB1150169A (xx)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3595002A (en) * 1968-04-18 1971-07-27 Yakov Ilich Korityssky Twisting and forming device for textile spinning and twisting machines
US3627584A (en) * 1969-06-10 1971-12-14 Parks Cramer Ltd Method for pneumatically cleaning open-end spinning machines
US3651632A (en) * 1969-04-09 1972-03-28 Tmm Research Ltd Open-end spinning devices
US3903683A (en) * 1972-08-11 1975-09-09 Masakazu Shino Method for spinning staples by means of the open-end system
US3924394A (en) * 1973-10-10 1975-12-09 Fritz Stahlecker Apparatus for piecing a thread in an open-end spinning unit
US3924393A (en) * 1973-10-10 1975-12-09 Fritz Stahlecker Apparatus for piecing a thread in an open-end spinning unit
US3925975A (en) * 1973-10-10 1975-12-16 Fritz Stahlecker Apparatus for piecing a thread in an open-end spinning unit
US4054024A (en) * 1974-09-30 1977-10-18 Hironori Hirai Apparatus for stopping and restarting the operation of an open-end spinning system
US4757678A (en) * 1986-11-25 1988-07-19 Hans Stahlecker Open-end rotor spinning machine
US20170101728A1 (en) * 2015-10-08 2017-04-13 Rieter Ingolstadt Gmbh Method for Preparing a Yarn End for Spinning in at a Rotor Spinning Device of a Rotor Spinning Machine along with a Rotor Spinning Machine
CN114808233A (zh) * 2022-04-24 2022-07-29 南通宏澳纺织有限公司 一种供给纱线装置和纺织设备

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH512597A (de) * 1970-06-19 1971-09-15 Rieter Ag Maschf Offenend-Spinnvorrichtung mit einem eine Fasersammelfläche aufweisenden Rotor
DE2507153B2 (de) * 1975-02-19 1980-02-28 Fritz 7347 Bad Ueberkingen Stahlecker Verfahren zum Anspinnen eines Fadens bei Offenend-Spinnaggregaten und Offenendspinnmaschine zum Durchführen des Verfahrens
GB1548004A (en) * 1975-05-20 1979-07-04 Platt Saco Lowell Ltd Open-end spinning machines
DE2534816C3 (de) * 1975-08-05 1979-12-20 Zinser Textilmaschinen Gmbh, 7333 Ebersbach OE-Spinnmaschine
FR2446792A1 (fr) * 1979-01-18 1980-08-14 Alsacienne Constr Meca Dispositif de changement automatique de bobine sur machine textile equipee d'un systeme de bobinage
CZ2015336A3 (cs) * 2015-05-20 2016-12-21 Rieter Cz S.R.O. Rotorový dopřádací stroj a způsob obnovování předení na pracovním místě rotorového dopřádacího stroje

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3119223A (en) * 1955-07-02 1964-01-28 Julius F M Meimberg Spinning device
US3334479A (en) * 1966-03-11 1967-08-08 Vyzk Ustav Bavlnarsky Device for securing yarn during stoppage of the spinning mechanism for the continuous ringless spinning of textile fibers
US3339359A (en) * 1965-12-20 1967-09-05 Ripka Josef Spinning chamber for removing impurities from fibers
US3375649A (en) * 1965-11-16 1968-04-02 Vyzk Ustav Bavlnarsky Servicing arrangement for spinning machines

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3119223A (en) * 1955-07-02 1964-01-28 Julius F M Meimberg Spinning device
US3375649A (en) * 1965-11-16 1968-04-02 Vyzk Ustav Bavlnarsky Servicing arrangement for spinning machines
US3339359A (en) * 1965-12-20 1967-09-05 Ripka Josef Spinning chamber for removing impurities from fibers
US3334479A (en) * 1966-03-11 1967-08-08 Vyzk Ustav Bavlnarsky Device for securing yarn during stoppage of the spinning mechanism for the continuous ringless spinning of textile fibers

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3595002A (en) * 1968-04-18 1971-07-27 Yakov Ilich Korityssky Twisting and forming device for textile spinning and twisting machines
US3651632A (en) * 1969-04-09 1972-03-28 Tmm Research Ltd Open-end spinning devices
US3627584A (en) * 1969-06-10 1971-12-14 Parks Cramer Ltd Method for pneumatically cleaning open-end spinning machines
US3903683A (en) * 1972-08-11 1975-09-09 Masakazu Shino Method for spinning staples by means of the open-end system
US3925975A (en) * 1973-10-10 1975-12-16 Fritz Stahlecker Apparatus for piecing a thread in an open-end spinning unit
US3924393A (en) * 1973-10-10 1975-12-09 Fritz Stahlecker Apparatus for piecing a thread in an open-end spinning unit
US3924394A (en) * 1973-10-10 1975-12-09 Fritz Stahlecker Apparatus for piecing a thread in an open-end spinning unit
US4054024A (en) * 1974-09-30 1977-10-18 Hironori Hirai Apparatus for stopping and restarting the operation of an open-end spinning system
US4757678A (en) * 1986-11-25 1988-07-19 Hans Stahlecker Open-end rotor spinning machine
US20170101728A1 (en) * 2015-10-08 2017-04-13 Rieter Ingolstadt Gmbh Method for Preparing a Yarn End for Spinning in at a Rotor Spinning Device of a Rotor Spinning Machine along with a Rotor Spinning Machine
US10400360B2 (en) * 2015-10-08 2019-09-03 Reiter Ingolstadt GmbH Method for preparing a yarn end for spinning-in at a rotor spinning device of a rotor spinning machine along with a rotor spinning machine
CN114808233A (zh) * 2022-04-24 2022-07-29 南通宏澳纺织有限公司 一种供给纱线装置和纺织设备
CN114808233B (zh) * 2022-04-24 2022-12-30 南通宏澳纺织有限公司 一种供给纱线装置和纺织设备

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Publication number Publication date
CH457221A (de) 1968-05-31
GB1150169A (en) 1969-04-30
BE706669A (xx) 1968-04-01
FR1544639A (fr) 1968-10-31
DE1560306B1 (de) 1972-05-25
CS159733B2 (xx) 1975-01-31

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