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US3399523A - Method of continuous spinning of fiber strands into yarns in a spinning chamber - Google Patents

Method of continuous spinning of fiber strands into yarns in a spinning chamber Download PDF

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Publication number
US3399523A
US3399523A US577256A US57725666A US3399523A US 3399523 A US3399523 A US 3399523A US 577256 A US577256 A US 577256A US 57725666 A US57725666 A US 57725666A US 3399523 A US3399523 A US 3399523A
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US
United States
Prior art keywords
spinning
yarn
point
stress
spinning chamber
Prior art date
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Expired - Lifetime
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US577256A
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English (en)
Inventor
Ripka Josef
Hybl Josef
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
Original Assignee
Vyzkumny Ustav Bavlnarsky AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by Vyzkumny Ustav Bavlnarsky AS filed Critical Vyzkumny Ustav Bavlnarsky AS
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Publication of US3399523A publication Critical patent/US3399523A/en
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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
    • D01H4/40—Removing running yarn from the yarn forming region, e.g. using tubes
    • 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

  • ABSTRACT OF THE DISCLOSURE A method of spinning yarn from a strand of fibers in a spinning chamber in which the fiber strand deposited on the collecting surface of the spinning chamber is twisted in a yarn which is withdrawn from the collecting surface in a plane normal to the axis of the spinning chamber and passing through the axis of the strand so that the strand is twisted symmetrically with respect to its axis, and in which the spinning chamber is rotated about the axis at a speed correlated with the withdrawing speed of the yarn in such a manner that the point of withdrawal of the yarn from the collecting surface of the spinning chamber moves relative to the collecting surface in direction of rotation of the spinning chamber.
  • the present invention relates to a method of continuous spinning of fiber strands into yarns in a spinning chamber.
  • a device which has apertures in its collecting surface through which an air flow is produced by underpressure so that the fibers are held by suction on the collecting surface which also increases the stress in the yarn at the point of its formation. Moreover, due to the alternation of solid areas with openings, a pulsating tension is created at the point of yarn formation.
  • Devices which have no apertures in their collecting surfaces, but which are provdeid with a drawing off surface which insures withdrawing of the yarn from the collecting surface at an angle of (l to 45 with respect to the axis of rotation of the spinning chamber.
  • a slow change of the curvature of the yarn curve adjacent to the collecting surface is determined by the angle of the drawing off surface, which change in ice turn is closely related to a high share of tension within the twisting zone of the total spinning tension at the discharge from the spinning chamber.
  • Another spinning device has been proposed wherein the collecting surface has no bores and wherein the yarn is withdrawn in a plane substantially normal to the axis of rotation of the spinning chamber, in which the withdrawal plane is, however, displaced in direction of the axis of rotation with respect to the axis of the fiber strand.
  • the disadvantage of this arrangement is an asymmetric twisting of the fibers and an unstable form of the yarn curve which has a bearing upon the high amplitude of stress variations at the twisting point of the fiber strand, besides this arrangement involves a harmful violent change in the direction of the fibers, exceeding In summing up it may be said that the devices and methods discussed hereinbefore operate under unfavorable conditions in the area of yarn formation, judged from the standpoint of twist transmission as well as from the coherence of the staple material being twisted, which in turn necessarily detrimentally affects both the production and the breakage rate in the existing devices. Due to these facts not one of the mentioned devices has so far been employed on an industrial scale.
  • the method of spinning yarn from a strand of fibers in a spinning chamber rotatable about an axis and having a smooth collecting surface constituted by a surface of revolution having an axis coinciding with the axis of rotation of the spinning chamber mainly comprises the steps of twisting a fiber strand deposited on the collecting surface into a yarn and withdrawing the yarn from the collecting surface substantially in a plane normal to the spinning axis and passing through the axis of the strand so that the fiber strand is twisted symmetrically with respect to its own axis, and rotating the spinning chamber about its axis and simultaneously withdrawing the yarn from the collecting surface at correlated speeds so as to maintain the sense of the angular velocity of the relative displacement of the point of withdrawal of the yarn from the collecting surface relative to the surface coincident with the sense of angular velocity of the spinning chamber.
  • FIG. 1 is a diagrammatical section through the spinning chamber taken along a plane normal to the axis of rotation of the latter;
  • FIG. 2 is a partial axial section through the spinning chamber
  • FIG. 3 shows a plurality of curves plotted on polar coordinates for different relationship between the relative and the absolute velocity at the point of withdrawal of the yarn from the collecting surface of the spinning chamber;
  • FIG. 4 shows a plurality of curves of axial stress development in the yarn corresponding to the curves shown in FIG. 3.
  • the spinning chamber has a collecting surface 2 on which a strand 3 of fibers is deposited by means known in the art and not forming part of the present invention.
  • This strand of fibers is withdrawn from the collecting surface 2 at Withdrawal point 4 and twisted in a yarn drawn off through the discharge opening 6.
  • FIG. 1 there are also indicated various velocities and stresses on which the process of the present invention depends, that is:
  • Wk indicates the sense of angular velocity of the spinning chamber 1
  • w indicates the sense of relative angular velocity of the withdrawal point 4.
  • Vector v indicates the absolute velocity of the withdrawal point 4 in the direction of the tangent 7 at the withdrawal point
  • Vector v indicates the relative velocity of the withdrawal point 4 also in the direction of the tangent line 7;
  • Vector S indicates the axial stress in the yarn at the withdrawal point 4.
  • Vector S indicates the axial stress in the yarn at the discharge opening 6.
  • the yarn 5 is withdrawn from the collecting surface 2 of the spinning axis on the upper surface of a stationary guide member 11, which upper surface is located in a plane normal to the axis 10 of the rotating spinning chamber 1 and at such elevations so that the yarn is withdrawn in a plane 9 passing through the axis 8 of the strand of fibers 3.
  • the strand 3 is twisted symmetrically with regard to its own axis 8.
  • Vector S indicates the axial stress in yarn 5 at the discharge opening 6 in front of the edge 12 of the opening 6;
  • Vector S indicates the discharge spinning stress in yarn 5
  • Arrow Mk indicates the twisting moment supplied by yarn 5 to twist the strand 3;
  • Arrow Mk indicates the resistance twisting moment oifered by the fiber strand 3 to the twisting thereof.
  • Yarn spinning with the aid of a spinning chamber having a smooth collecting surface 2 constituted by a surface of revolution having a generatrix in form of a curve, the concave side of which faces the axis of rotation of the spinning chamber, is carried out at reduced control of fibers, that is, the fibers are in this case not held in the nip of a pair of drawing rolls, but the fibers are held against the collecting surface only by a centrifugal action.
  • One of the features which influences the proper spinning of the fiber strand is the discharge spinning stress S in the yarn, on which depends, to a certain degree, the thrust at which the fibers of the spun yarn are pressed against each other in a direction normal to the longitudinal direction of the yarn.
  • the spinning process proper and thus the formation of yarn are more influenced by the stress S existing at the point at which the fiber strand 3 is being twisted and simultaneously withdrawn from the collecting surface 2.
  • the advantage of the method of the present invention is that by choosing a suitable y, the stress at the point of yarn formation is kept, in dependence upon the discharge stress S within permissible limits, that is under the breaking point of the fiber strand at this point and the effects of detrimental influences as discussed hereinbefore are thereby substantially reduced. This results in a reduction in the breaking rate and therefore the continuity of the spinning process is enhanced.
  • R diameter of the collecting surface 2 of the spinning chamber 1
  • n number of revolutions of the spinning chamber per minute.
  • a method of spinning yarn from a strand of fibers in a spinning chamber rotatable about an axis and having a smooth collecting surface constituted by a surface of revolution having an axis coinciding with the axis of the spinning chamber comprising the steps of frictionally twisting a fiber strand deposited on said collecting surface into a yarn and withdrawing said yarn from said collecting surface substantially in a stationary plane normal to the axis of rotation of the spinning chamber and passing through the axis of the strand so that the fiber strand is frictionally twisted symmetrically with respect to its own axis; and rotating said spinning chamber about its axis and simultaneously withdrawing the yarn from said collecting surface at correlated speeds so as to maintain the sense of the angular velocity of the relative displacement of the point of withdrawal of the yarn from said collecting surface relative to said surface coincident with the sense of angular velocity of the spinning chamher.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US577256A 1965-09-11 1966-09-06 Method of continuous spinning of fiber strands into yarns in a spinning chamber Expired - Lifetime US3399523A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS560765 1965-09-11

Publications (1)

Publication Number Publication Date
US3399523A true US3399523A (en) 1968-09-03

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Family Applications (1)

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US577256A Expired - Lifetime US3399523A (en) 1965-09-11 1966-09-06 Method of continuous spinning of fiber strands into yarns in a spinning chamber

Country Status (7)

Country Link
US (1) US3399523A (de)
AT (1) AT268942B (de)
BE (1) BE685608A (de)
CH (1) CH448828A (de)
DE (1) DE1535003B2 (de)
ES (1) ES331084A1 (de)
GB (1) GB1126773A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3768246A (en) * 1966-12-20 1973-10-30 Toray Industries Spun yarn and its doubled yarn and the process for manufacturing the same
US3908349A (en) * 1973-09-19 1975-09-30 Kaiwa Boseki Kabushiki Kaisha Fiber guiding plate for a rotary spinning chamber of an open end spinning machine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CS163986B1 (de) * 1973-02-02 1975-11-07
DE10160067A1 (de) * 2001-12-06 2003-06-18 Schlafhorst & Co W Verfahren und Vorrichtung zum Verspinnen textiler Stapelfasern mittels eines Spinnrotors

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3163976A (en) * 1962-05-25 1965-01-05 Alsacienne Constr Meca Spinning device
US3210923A (en) * 1960-07-28 1965-10-12 Spinnbau Ges G M B H Device for spinning staple fibers
GB1031150A (en) * 1964-11-25 1966-05-25 Elitex Zavody Textilniho A device for continuous centrifugal spinning
US3324642A (en) * 1964-01-08 1967-06-13 Meimberg Julius Process and apparatus for spinning staple fibers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3210923A (en) * 1960-07-28 1965-10-12 Spinnbau Ges G M B H Device for spinning staple fibers
US3163976A (en) * 1962-05-25 1965-01-05 Alsacienne Constr Meca Spinning device
US3324642A (en) * 1964-01-08 1967-06-13 Meimberg Julius Process and apparatus for spinning staple fibers
GB1031150A (en) * 1964-11-25 1966-05-25 Elitex Zavody Textilniho A device for continuous centrifugal spinning

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3768246A (en) * 1966-12-20 1973-10-30 Toray Industries Spun yarn and its doubled yarn and the process for manufacturing the same
US3908349A (en) * 1973-09-19 1975-09-30 Kaiwa Boseki Kabushiki Kaisha Fiber guiding plate for a rotary spinning chamber of an open end spinning machine

Also Published As

Publication number Publication date
CH448828A (de) 1967-12-15
BE685608A (de) 1967-02-01
DE1535003A1 (de) 1971-05-27
AT268942B (de) 1969-02-25
DE1535003B2 (de) 1975-04-10
ES331084A1 (es) 1967-07-01
GB1126773A (en) 1968-09-11

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