US3786622A - Yarn spinning method and apparatus therefor - Google Patents

Yarn spinning method and apparatus therefor Download PDF

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Publication number
US3786622A
US3786622A US00306826A US3786622DA US3786622A US 3786622 A US3786622 A US 3786622A US 00306826 A US00306826 A US 00306826A US 3786622D A US3786622D A US 3786622DA US 3786622 A US3786622 A US 3786622A
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United States
Prior art keywords
sliver
rotor
screw surface
fibers
inner rotor
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Expired - Lifetime
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US00306826A
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English (en)
Inventor
E Negishi
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.)
NEGISHI KOGYO KENKYUSHO KK
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NEGISHI KOGYO KENKYUSHO KK
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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

Definitions

  • the present invention relates to improvements in a spinning method of the open-end spinning system and to apparatuses therefor.
  • the main reason for the disadvantages as mentioned above resides in'that the sliver of the fibers is subjected to a mere rotation and twisting while being drawn, so that there is no action to transfer said sliver toward the direction of spinning out, and according, owing to the lack of this action, stretching of drafting of the sliver becomes too difficult to be put to practice.
  • a third object of the present invention is to provide apparatuses and parts thereof which are most efficiently adapted for embodying the methods of the present invention.
  • the above and other object of the present invention have been attained by supplying fibers to be processed into an inner rotor from an upper portion thereof, said inner rotor being disposed in an outer rotor having an inner screw surface so as to be differentially rotated with respect to said outer rotor, discharging successively the fibers supplied into said inner rotor from this rotor at one vertical position thereof onto said screw surface so as to cross uniformly the screw thereads of said screw surface, collecting the fibers distributed on said screw surface at another position of said inner rotor with the progression of the rotation of the rotors, transferring the thus collected fibers being so-called as sliver toward spinning-out direction, for example toward an outlet guide hole provided at the bottom part of said inner rotor, and drawing the thus transferred sliver through said guide hole by means of drawing rolls while suppressing dispersion of free ends of the fibers by the inner wall of said guide hole and twisting said sliver at the position between said guide hole and said drawing rolls.
  • FIG. 1 is a vertical sectional view showing schematically the whole structure of one example of the apparatus according to the present invention
  • FIG. 2 is a sectional view along the line lI-II in FIG.
  • FIG. 3 is an enlarged sectional view showing exaggerately a part of the section shown in FIG. 2 thereby to show clearly the state of holding a sliver;
  • FIG. 4 is an enlarged sectional view showing exaggerately a part of a second example relating to the sliver transferring means
  • FIG. 5 is a plan view of the part shown in FIG. 4;
  • FIG. 6 is a cross-sectional view showing a part of a third example of the sliver transferring means.
  • FIG. 7 is a partial plan view of the structure shown in FIG. 1, said view showing means for differentially rotating the inner and outer rotors.
  • the spinning unit comprises an outer rotor A which is supported so as to be rotated toward the arrow direction and provided at its inner wall with a right-hand screw surface 1, and an inner rotor B supported rotatably in the outer rotor A, the rotating speed of the rotor B being made lower than that of the rotor A thereby to cause differential rotation between the rotors A and B.
  • the inner rotor B is provided with an upper hollow shaft 2, a lower shaft 8, and a whorl l3 screwed onto said hollow shaft 2, and the outer rotor A is provided with a lower whorl 12 and an upper whorl 11 having a flange 23'which is hanged on the upper edge of a pair of pulleys 14 and 14a as described later.
  • a thrust bearing 28 for rotatably supporting the inner rotor B is put'between the whorl l3 and the flange 23.
  • the outer rotor A is made of two parts secrewed to each other so as to be separated in the case of assembling the unit, and bearings 27 and 27a are provided respectively between the whorl 11 and the hollow shaft 2 and between the whorl 12 and the shaft 8, whereby the inner rotor B is coaxially and rotatably supported in the outer rotor A.
  • the upper whorl 11 is pressed and engaged with pulleys 14 and 14a (FIG. 7) which are respectively fixed to shafts 29 and 29a and rotatably supported together with lower pulleys 15 through respective shafts l7 and 17a, said lower pulleys 15 being pressed to and engaged with the lower whorl 12, whereby the outer rotor A is rotatably supported in a vertical manner.
  • a whorl 13 attached to the upper part of the hollow shaft 2 is engaged with two pulleys l6 and 16a, whereby the whorl l3 and therefore the inner rotor B are caused to rotate.
  • the rotating speed of the inner rotor B can be made lower than that of the outer rotor A.
  • the rotating speeds of the rotors A and B can be taken as 30,000 r/m and 29,500 r/m, respectively.
  • any means may be used for the support of the outer rotor A.
  • the flange 23 can be used for supporting the spinning unit as shown in FIG. 1; conventional ball bearings such as those used in any type motor can be used for supporting the outer rotor; of the spinning unit can be forcibly pressed onto the driving pulleys by any means such as magnetic force adapted to attract the outer rotor A toward the pulleys (14, 14a), (15, 15a) and (16, 16a).
  • magnetic force adapted to attract the outer rotor A toward the pulleys (14, 14a), (15, 15a) and (16, 16a).
  • the inner rotor B is provided therein with a first split slot 4 which is partially communicated with the inner hole of the hollow shaft 2 and opens at its side part toward the screw surface 1, the hollow shaft 2 being communicated with a conventional fiber feeding means provided on the hollow shaft 2, detailed structure of said means 20 not being shown because it is conventional art, whereby the fibers introduced into the hollow shaft 2 from said fiber supplying means are caused to be discharged out through said side part of the split slot 4 while being regulated by side wall 3 of the split slot 4.
  • the inner rotor B is provided with a second split slot 4a, and an endless apron band 6 hung around shafts 5, 5a and 5b supported in the inner rotor B or around pulleys 5c, 5d, and 5e supported by said shafts is disposed in the split slot 40 the apron band 6 being provided with outer teeth 6a which are engaged with the screw surface 1 of the outer rotor A, whereby the endless apron band 6 is caused to undergo rotation with a speed corresponding to the product of the screw pitch of said screw surface 1 and the difference between rotations of the inner and outer rotors A and B.
  • the above-mentioned split slot 4a and endless apron band 6 compose a sliver forming and transferring means.
  • the inner rotor B is providee at its lower shaft 8 with a sliver guide hole 21 for the drawing-out of the sliver F, and a pair of drawing rolls 9 and 9a are provided below the guide hole 21 thereby to draw out the sliver discharged out from the guide hole while twisting the sliver at the position between the guide hole and the drawing rolls.
  • the endless apron band can be made of leather, synthetic resin, or the like flexible material and is provided at one side of its outer periphery with parallel teeth 6a each having a width corresponding to about 7 1 $6 of the width of the band thereby to leave a blank space 26 connected to the root part 25 of said side of the tooth 6a.
  • the fibers f pressed distributedly onto the screw surface of the outer rotor A successively enter into said blank space 26 and hanged on the side face of the tooth 6a with the progression of the differential rotations of the rotors A and B, whereby the fibers collected in said blank space are formed into a sliver.
  • the thus formed sliver is subjected to endless revolution together with the apron band and gradually slides down along the slope of the screw surface 1 while being held between the screw surface and the blank space, whereby the sliver is transferred toward the bottom guide hole 21 of the inner rotor.
  • the air existing in the split slot 4 of the inner rotor B is discharged out, due to the sentrifugal force, toward the screw surface I of the outer rotor A.
  • the thus discharged air is substantially discharged out through the fine holes 1b, and the remaining part of the air is guided toward the lower part of the rotor B along the screw surface 1 due to a guiding function caused by screw rotation. Then the thus guided air is discharged out through the guide hole 21.
  • the thus formed sliver F is slidably transferred downward along the slope of the screw surface 1 while being pressed onto said screw surface and side faces of the teeth 6a of the apron band 6, whereby said sliver is in troduced into and discharged from the guide hole 21 while being subjected to revolution together with the apron band and being accompanied by the endless rotation of said apron band.
  • the essential feature of the spinning method as described above is that the fibers are subjected to rotation in the stat wherein they are distributed aong and pressed onto the screw surface 1 of the outer rotor A, and these rotating fibers are formed into a sliver and transferred toward the spinning-out direction at a predetermined transferring speed while being subjected to collecting operation, said transferring speed corresponding to the product of 'sliver is introduced between the rotating drawing-rolls 9 and 9a, the sliver is drawn out while being twisted.
  • the drawing speed of the rolls 9 and 9a is n times of the transferring speed of the sliver F
  • the sliver will be stretched or drafted at a rate of n times.
  • the single fibers composing the sliver are spun while being appropriately stretched by the friction produced therebetween.
  • the apron band 6 adopted in the first example shown in FIG. 1 may be replaced by pin members made of synthetic material ormetal, or by a particular airflow.
  • the pin members 10 are parallelly supported by the inner rotor Bso as to project at their ends into the respective slots 1a of the screw surface 1 of the Outer rotor A.
  • the outer and inner rotorsA and B are differentially rotated as in the case of the first example illustrated in FIGS.
  • each pin member 10 is firstbent as shown by 10a and then restored to its original form, this bending and restoration of the pin members being cyclically repeated, whereby the fibers are gathered on one side of the pin members asshown in FIG. 5, thus causing formation of the silver F.
  • the thus formed silver F is then transferred downward while being slid along the slope of the screw surface 1 as disclosed in connection with the example shown in FIG. 1.
  • the opening end part 3b of the split slot 4 is bent toward the rotational direction of the rotors A and B as shown in FIG. 6, and the rotary speed of the outer rotor A is made lower than that of the inner rotor B contrary to the case of the first example, and screw direction of the screw surface 1 being converted to left-hand winding, whereby the fibers discharged out for the split slot 4 are pressed onto said screw surface and caused to beslide along the screw surface while being supported at the tip end of the split slot 4 by the airflow discharged from the split slot, thus forming a sliver and transferring the same toward the spinning-out direction at a predetermined speed.
  • Means for the protection of the fibers from dispersion of their free ends Another essential feature of the invention is that during the course of spinning the sliver while it is drawn out and twisted, remarkable bending at the boundary between the sliver and the spun yarn can be avoided as much as possible and dispersion of the fiber free ends due to centrifugal force can be effectively suppressed thereby to remove nap produced on the spun yarn.
  • the essential feature as described above can be effectively embodied by the fiber guide hole 21 of the inner rotor B.
  • This guide hole 21 is at its one end communicated with the split slot 4a and at its other end opened at the central portion of the lower shaft 8 of the inner rotor B.
  • the yarn spinning line consisting of the central line of the guide hole 21 and the central line of the yarn passage from the bottom center of the short 8 to the nip point 22 between the drawing rolls 9, 9a is almost straight exceptfor a slight bending of said yarn spinning line at the bottom center.
  • the sliver part Fa between the sliver F and spun yarn Fb drawn from the bottom center of the shaft 8 toward the drawing rolls 9, 9a' is surrounded by the inner surface of the guide hole 21.
  • twisting of the sliver part Fa between the tip end of the sliver F and the spun yarn Fb is carried out in such a manner that the yarn parts are first twisted by the rotation of the spinning unit and this twisting is transferred back to the sliver part Fa, so that the degree of bending of the spun yarn Fb is relatively large thereby to increase resistance against the back-transference of the twisting, whereby the back-transference of the twisting toward the sliver part Fa is retarded, thus causing insufficient twisting. Consequently, the degree of the twisting of the sliver part Fa is relatively low, thus causing frequent breaking of the yarn.
  • the above described apparatus can be variously modified without affecting its functional performance.
  • the means for causing a difference between the rotations of the outer and inner rotors may be optionally modified, the screw surface 1 of the outer rotor A may be formed as a conical surface or cylindrical surface along the whole length thereof, the axial direction of the pulleys adatped to support the spinning unit may be horizontally or obliquely directed, the screw-winding of the screw surface 1 of the outer rotor A may be lefthanded, the speed of the inner rotor B may be made larger than that of the outer rotor A, or the inner hold of the hollow shaft 2 of the inner rotor B may have an inverted-cone shape, or the guide hole 21 may be formed as a slant split slot.
  • a yarn spinning method of the open-end spinning system which comprises supplying fibers tobe processed into an inner rotor from upper portion thereof,
  • said inner rotor being disposed in an outer rotor having an inner screw surface so as to be differentially rotated with respect to said outer rotor, discharging successively the fibers supplied into said inner rotor from this rotor at one vertical position thereof onto said screw surface of the outer rotor so as to cross uniformly the screw threads of said screw surface, collecting the fibers distributed on said screw surface at another position of said inner rotor with the progression of the rotation of the rotors thereby to form a sliver at said position, transfering the thus formed sliver toward a spinning-out direction and drawing the thus transferred sliver by means of drawing rolls while twisting said sliver.
  • a yarn spinning apparatus adapted for the openend spinning system, which comprises: a fiber supplying means for supplying the fibers to be processed into the apparatus; an outer rotor having an inner screw surface; an inner rotor disposed in said outer rotor and provided with a top hollow portion adapted to suck thereinto the fibers supplied from said fiber supplying means, a split slot adapted to discharge and press the fibers introduced therein onto the screw surface of said outer rotor owing to the centrifugal force of said inner rotor, a bottom guide hole, and means adapted to collect the fibers pressed on said screw surface thereby to form a sliver and to transfer the thus formed sliver toward said bottom guide hole of the inner rotor; means adapted to establish a difference between the same directional rotations of said outer and inner rotors thereby to cause uniform distribution of the fibers discharged from said split slot over said screw surface owing to said difference of the rotations of said outer and inner rotros; and means adapted to draw out the s
  • a yarn spinning apparatus as claimed in claim 2, in which the outer rotor is formed of upper and lower parts which are separately assembled as one body, and the means adapted to establish a difference between the same directional rotations of the outer and inner rotors comprises whorls provided respectively at top and bottom portions of the outer rotor, pulleys, bearings inserted between said top whorl and the top hollow shaft of the inner rotor and between said bottom whorl and the bottom shaft of the inner rotor, another whorl attached to the upper part of said hollow shaft and having a diameter differing from that of the aforementioned whorls which are respectively pressed frictionally onto said pulleys, and means adapted to drive said pulleys, whereby the outer and inner rotors are caused to be differentially rotated.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US00306826A 1971-11-16 1972-11-15 Yarn spinning method and apparatus therefor Expired - Lifetime US3786622A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7191767A JPS4854222A (enrdf_load_stackoverflow) 1971-11-16 1971-11-16

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US3786622A true US3786622A (en) 1974-01-22

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US00306826A Expired - Lifetime US3786622A (en) 1971-11-16 1972-11-15 Yarn spinning method and apparatus therefor

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US (1) US3786622A (enrdf_load_stackoverflow)
JP (1) JPS4854222A (enrdf_load_stackoverflow)
CH (1) CH535844A (enrdf_load_stackoverflow)
DE (1) DE2255702A1 (enrdf_load_stackoverflow)
FR (1) FR2160423B1 (enrdf_load_stackoverflow)
GB (1) GB1410829A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4168601A (en) * 1977-03-09 1979-09-25 Vyzkumny Ustav Bavlnarsky Frictional open-end spinning method and apparatus
US4222222A (en) * 1977-12-29 1980-09-16 Vyzkumny Ustav Bavlnarsky Open-end frictional spinning apparatus
US4545194A (en) * 1983-04-29 1985-10-08 Yves Juillard Spinning method and apparatus for putting method to use
US4925088A (en) * 1989-09-06 1990-05-15 R. G. Barry Corporation Packaging container
US20220339689A1 (en) * 2019-10-09 2022-10-27 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Method for joining members

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4091605A (en) * 1976-02-23 1978-05-30 Alan Nicholas Jacobsen Method and apparatus for the twisting of yarn

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3368339A (en) * 1966-01-27 1968-02-13 Negishi Kogyo Kenkyusho Urawa Rotating spinning tube
US3447299A (en) * 1963-01-23 1969-06-03 Negishi Kogyo Kenkyusho Kk Method and device for rotary conveying of fibers

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3447299A (en) * 1963-01-23 1969-06-03 Negishi Kogyo Kenkyusho Kk Method and device for rotary conveying of fibers
US3368339A (en) * 1966-01-27 1968-02-13 Negishi Kogyo Kenkyusho Urawa Rotating spinning tube

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4168601A (en) * 1977-03-09 1979-09-25 Vyzkumny Ustav Bavlnarsky Frictional open-end spinning method and apparatus
US4222222A (en) * 1977-12-29 1980-09-16 Vyzkumny Ustav Bavlnarsky Open-end frictional spinning apparatus
US4545194A (en) * 1983-04-29 1985-10-08 Yves Juillard Spinning method and apparatus for putting method to use
US4925088A (en) * 1989-09-06 1990-05-15 R. G. Barry Corporation Packaging container
US20220339689A1 (en) * 2019-10-09 2022-10-27 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Method for joining members
US11701701B2 (en) * 2019-10-09 2023-07-18 Kobe Steel, Ltd. Method for joining members

Also Published As

Publication number Publication date
JPS4854222A (enrdf_load_stackoverflow) 1973-07-30
GB1410829A (en) 1975-10-22
CH535844A (fr) 1973-04-15
FR2160423B1 (enrdf_load_stackoverflow) 1974-08-19
DE2255702A1 (de) 1973-05-30
FR2160423A1 (enrdf_load_stackoverflow) 1973-06-29

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