US3673782A - Magnetic false twist spindle - Google Patents

Magnetic false twist spindle Download PDF

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Publication number
US3673782A
US3673782A US59552A US3673782DA US3673782A US 3673782 A US3673782 A US 3673782A US 59552 A US59552 A US 59552A US 3673782D A US3673782D A US 3673782DA US 3673782 A US3673782 A US 3673782A
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United States
Prior art keywords
roller
magnets
assembly
recited
support member
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Expired - Lifetime
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US59552A
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English (en)
Inventor
Josef Raschle
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.)
Moulinage et Retorderie de Chavanoz SA
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Moulinage et Retorderie de Chavanoz SA
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Classifications

    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
    • D02G1/04—Devices for imparting false twist
    • D02G1/06—Spindles

Definitions

  • ABSTRACT A magnetic false twist spindle comprising a support formed Aug. 1, 1969 France ..69/26460 from magnetic material asingle driving roller mounted in this support, at least two magnets located in said support with the [52] U.S. Cl 57/77.45 poles or associated pole pieces adjacent the Periphery of the [51] Int. Cl.
  • the present invention relates to magnetic false twist spindles, more particularly the present invention relates to a magnetic mono-roller false twist spindle supported by a simple magnet.
  • spindles In the texturing of textile threads or yarns by false twist, spindles are used which impart false twist to the yarn, the twist travelling up in the yarn towards a healing element acting on the yarn when the latter is in the twisted state,.the twist already introduced being set during the subsequent cooling step.
  • Numerous devices are known for imparting false twist. As a rule, they comprise a tubular spindle which is provided with means for locking the twist and with means for rotating the spindle.
  • the device described which employs a horseshoe magnet, nevertheless has the disadvantage that the magnetic field is closed through the driving roller, thus involving a risk of the generation of Foucault currents, accompanied by braking and heating effects.
  • a magnetic false twist spindle comprising a support formed of magnetic material, a single driving roller mounted for rotation with respect to said support, at least two magnets located in openings in said support, with their poles or with associated pole pieces adjacent the periphery of the roller near the axial ends thereof and a spindlette, provided with false twist locking means, held in frictional contact by the magnets, the magnetic path being completed by the spindlette and the support.
  • only two magnets are provided, the magnets being mounted substantially coaxially in the same magnetic sense, with the north pole of one magnet near one axial end of the roller and the south pole of the other magnet near the other axial end of the roller.
  • two pairs of magnets are provided, the two magnets of a pair being mounted substantially coaxially with the two magnets of the other pair, and in the same magnetic sense, with the north poles of one pair near one axial end of the roller and the south poles of the other pair near the other axial end of the roller.
  • only two magnets are provided, and are mounted substantially parallel to one another and parallel to and on opposite sides of the spindlette, magnetic pole pieces carried by the support being located one near each axial end of the roller.
  • FIG. 1 is a side elevation of one embodiment of spindle according to the invention.
  • FIGS. 2A to 5A are side elevations of four further embodiments.
  • FIGS. 2B to 5B are plan views of the spindles of FIGS. 2A-5A respectively.
  • a spindlette l is drawn magnetically against a single roller or pulley 2 which is formed with flanges 3 and 4.
  • the spindlette comprises false twist locking means, for example crossed bars, and is formed with a central ring 5 associated with the groove in the pulley 2 between the two flanges 3 and 4.
  • the pulley 2 is mounted on a shaft 6 having a drive pulley 7.
  • the shaft 6 is mounted by means of precision bearings 8 and 9 in two bearings 10 and 11 in a support 12 of magnetic material having an upper arm 13 for the upper bearing 10 and a lower arm 14 for the lower bearing 11.
  • the shaft abuts in the bearing 10 but extends through the bearing 11, the pulley 7 being disposed externally of the support 12, which is mounted on a frame (not shown) by means of two rods 15 and 16.
  • the upper arm 13 of the support 12 carries a simple prismatic magnet 18 having a bevelled lip 20 acting as a pole piece
  • the lower arm 14 of the support 12 carries a prismatic magnet 19 coaxial with magnet 18 and having a bevelled lip 21 acting as a pole piece.
  • the ends of the spindlette l are disposed opposite the lips 20 and 21 with an air gap of minimum size.
  • the magnetic circuit is indicated by arrows F F F F it may also be in the opposite direction.
  • roller or pulley There is no magnetic flux through the roller or pulley, if the latter is made from an inert material.
  • a false twist spindlette 31 of magnetizable material is magnetically drawn towards a roller 32 provided with two flanges 33 and 34.
  • the spindlette is provided with known twist locking means, for example crossed bars.
  • the spindlette 31 at its center, the spindlette 31 carries a stabilizing ring 35.
  • a support in the form of a rectangular window 36 having, half-way up, a portion exhibiting a marked cranked portion 36', which overlies the axial ends of the flanges 33 and 34 in such manner that the plane of the main portion of the window intersects the roller sufiiciently near to the axis 32 of the roller 33.
  • the said window carries two pairs of magnets 37, 38 and 39, 40 of simple shape, such as prismatic or cylindrical shape, arranged in the same magnetic sense so that a north pole is situated opposite a south pole identically in each case.
  • the magnets 37, 39 and also 38, 40 carry a common nose or pole piece 41 which is rounded or bevelled at the end 42.
  • the apices of these ends are in a plane very close to that of the axis of the spindlette, while of course leaving the space required for the axial passage of the yarn to which false twist is to be imparted.
  • the magnetic flux is double and circulates in the direction of the two arrows F F (or in the opposite direction).
  • the magnetic system may for example be of cast iron.
  • the window may be attached separately or may be integral with the support of the roller carrying element.
  • FIGS. 3A and 33 like reference numerals have been used but increased by 20 as compared with FIGS. 2A and 2B.
  • the window is only half that of the preceeding Figures and there is only one pair of magnets.
  • the magnetic flux is in the direction of arrow F (or in the opposite direction).
  • the magnetic system may be based on oxides.
  • the window 76 is complete, as in the first example, but there is only one pair of magnets 82, 83, having pole pieces 82', 83' and centered relatively to the spindlette 71.
  • the magnets are bevelled at the front 84.
  • the reference numerals have been increased by a further 20.
  • the magnetic flux is in the direction of arrows F and F, and is centered by the pole pieces 102','l03.
  • a magnetic false twist spindle assembly comprising a support member; a driving roller mounted on said support; at least two magnets carried by said support member and forming a pair of poles, each disposed adjacent the periphery of said roller near opposite axial ends thereof; and a spindlette having false twist locking means and being held in contact with said roller by a magnetic field established by said magnets, said support member providing a continuous path for completing said magnetic field through said support member and said spindlette.
  • said pair of air gaps being the only air gaps in said magnetic path.
  • said support member has a pair of arms extending across the axial ends of said roller for supporting said magnets and has a part extending parallel to the axis of said roller interconnecting said arms, said support member being integrally formed of a magnetizable material.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US59552A 1969-08-01 1970-07-30 Magnetic false twist spindle Expired - Lifetime US3673782A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6926460A FR2055854A5 (enrdf_load_stackoverflow) 1969-08-01 1969-08-01

Publications (1)

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US3673782A true US3673782A (en) 1972-07-04

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Application Number Title Priority Date Filing Date
US59552A Expired - Lifetime US3673782A (en) 1969-08-01 1970-07-30 Magnetic false twist spindle

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US (1) US3673782A (enrdf_load_stackoverflow)
FR (1) FR2055854A5 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102848505A (zh) * 2012-09-04 2013-01-02 张艳 一种橡胶包铁热压硫化成型方法及专用模具

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102848505A (zh) * 2012-09-04 2013-01-02 张艳 一种橡胶包铁热压硫化成型方法及专用模具
CN102848505B (zh) * 2012-09-04 2015-08-19 东莞市福瑞德橡塑制品有限公司 一种橡胶包铁热压硫化成型方法及专用模具

Also Published As

Publication number Publication date
FR2055854A5 (enrdf_load_stackoverflow) 1971-05-14

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