US3557541A - Double twist spindle and method of twisting - Google Patents

Double twist spindle and method of twisting Download PDF

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Publication number
US3557541A
US3557541A US770769A US3557541DA US3557541A US 3557541 A US3557541 A US 3557541A US 770769 A US770769 A US 770769A US 3557541D A US3557541D A US 3557541DA US 3557541 A US3557541 A US 3557541A
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US
United States
Prior art keywords
yarn
spindle
rotor
twisting
double twist
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Legal status (The legal status 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 status listed.)
Expired - Lifetime
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US770769A
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English (en)
Inventor
Jean Aucagne
Pierre Felix
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.)
Rhodiaceta SA
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Rhodiaceta SA
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Filing date
Publication date
Application filed by Rhodiaceta SA filed Critical Rhodiaceta SA
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H7/00—Spinning or twisting arrangements
    • D01H7/02—Spinning or twisting arrangements for imparting permanent twist
    • D01H7/86—Multiple-twist arrangements, e.g. two-for-one twisting devices ; Threading of yarn; Devices in hollow spindles for imparting false twist
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/10—Spinning or twisting machines in which the product is wound-up continuously for imparting multiple twist, e.g. two-for-one twisting
    • D01H1/105—Arrangements using hollow spindles, i.e. the yarns are running through the spindle of the unwound bobbins
    • D01H1/106—Two-for-one twisting

Definitions

  • the present invention relates to a double twist spindle and a method of twisting.
  • a double twist spindle comprising a hollow shaft forming a support for a yarn package, yarn tensioning means at the inlet to said shaft, a rotor rotatable with respect to a package supported on said shaft, about the axis of said shaft, a continuous conduit rotatable with said rotor and positioned to receive yarn fed from said package via said inlet, the outlet to said continuous conduit being positioned radially outwardly of said shaft, and a take-up member carried by the rotor between the hollow shaft and the outlet of said continuous conduit, whereby yarn leaving said outlet describes an enclosed are about said take-up member.
  • continuous conduit is to be understood to mean a conduit, of a continuous character, which is in no way interrupted by anything in the nature of a slot, orifice or the like, which results in an appreciable drop in the negative pressure caused by the rotation of the spindle.
  • the tensionig means may be of any desired type, such as the ball-type, or preferably the magnetic tensioning type, since the latter has a low degree of inertia.
  • the rotor may of a cup-shaped form, having an axially extending hollow shank, the continuous conduit being formed, at its upstream portion, by the hollow shank, and at its downstream portion, by at least one tube connected thereto and conforming to the shape of the cup-shaped member.
  • the latter in order to ensure improved balance of the spindle, and in order to achieve, for the same spindle speed, different negative pressures in the continuous conduit, the latter is preferably constituted by a plurality of tubes disposed at equi-angular intervals relative to the spindle axis.
  • the yarn aspiration value for a given speed of rotation of the spindle may be regulated in accordance with the operational conditions to be employed, simply by blocking one or more of such plurality of tubes.
  • the invention also provides a method of double twisting a yarn in which the yarn is fed through a hollow rotatable spindle and passed through a yarn guide to form a balloon, comprising regulating the tension of the yarn at the inlet to said spindle, effecting controlled aspiration of the yarn in said spindle, and taking up the yarn on a take-up member in such manner that the yarn describes thereon an encircled arc of between a quarter of a turn and one turn.
  • FIG. 1 is a schematic cross-section of the one embodiment of double twist spindle according to the present invention.
  • FIG. 2 is a schematic fragmentary view of a modified form or spindle according to the invention.
  • FIG. 3 is a graph illustrating the relationship between speed of rotation and negative pressure produced using a spindle according to the invention.
  • a hollow cup-shaped rotor 1 having a central vertical axial shank portion 2, the rotor being rotatable in bearings 3 carried by a support 4.
  • a hollow stator 5 supported on the shank 2 by bearings 6, and prevented from rotating by magnets 7 and 8 mounted on the stator 5 and support 4 respectively.
  • a hollow shaft 9 extends vertically upwardly from the stator 5, and forms a downstream portion of a continuous conduit illustrated by the general reference numeral 10.
  • An axial continuation 11 of the hollow shaft 9 extends into the shank 2 of the rotor 1 and the conduit further includes an elbow portion 12, and an oblique portion 13 which extends radially upwardly at an angle to the axis.
  • the continuous conduit 10 is completed by a portion 14 which extends parallel to the axis of the rotor.
  • the portions 11, 12, 13 and 14 of the continuous conduit are formed on the rotor and rotate with the latter.
  • the rotor At its upper end, the rotor is provided with a take-up member in the form of a downwardly convergent annular conical shell member 15. Surrounding the shaft 9 is a resilient ring 16 which serves to centre a yarn package 17 on the shaft 9.
  • a magnetic tension means 18 which tensions yarn leaving the package and entering the inlet at the upper end of the hollow shaft 9.
  • a yarn guide 19 Mounted immediately above the yarn tensioning device, on the axis of the spindle, is a yarn guide 19.
  • yarn leaves the package 17 passes through the yarn tensioning device 18, and downwardly through the hollow shaft 9. It then passes through the continuous conduit 10, makes an enclosed arc around the shell member 15 and finally passes up through the yarn guide 19. Rotation of the rotor causes a negative pressure to be produced in the continuous conduit 10.
  • FIG. 2 illustrates a modified form of rotor.
  • the rotor 20 instead of having an integral shank, is formed with a removable tube 21, of hardened steel, corundum, ceramic or similar material.
  • tube 21 is formed with two semiovoidal symmetrical elements 22, 22', these respectively being formed with grooves 23, 23.
  • a cup 25 Resting in a recess 24 in the rotor 20 is a cup 25 which, together with the grooves 23, 23 forms the equivalent of the elbow portion of the continuous conduit 10 of the embodiment of FIG. 1.
  • the cup 25, and the tube 21, are secured in place on the rotor by a plate 26, which is formed with a pair of apertures in alignment with the grooves 23, 23'.
  • tubes 27, 28 Inserted into these apertures are tubes 27, 28 which extend at an angle to the axis of the rotor and constitute the downstream end of the continuous conduit of this embodiment. All the components are disposed symmetrically to provide for dynamic balancing of the rotor.
  • a particularly preferred embodiment is a spindle having three tubes, disposed at 120 relative to one another around the axis of the spindle.
  • a spindle having three such equi-angularly disposed tubes was provided with a water pressure gauge at the spindle inlet.
  • the corresponding negative pressures were measured, and were plotted on a graph, as illustrated in FIG. 3.
  • the abscissa of this graph illustrates the speed of rotation, measured in units of 1000 r.p.m. while the ordinate expresses the negative pressure measured in millimetres of water.
  • the curve I illustrates the result with two of the outlet orifices blocked, and one open, while the curves II and III illustrate the operation with two and three orifices open respectively. In each instance, the yarn travels through the open or one of the open orifices.
  • EXAMPLE 1 A spindle having three equi-angularly disposed continuous conduits, and the total weight of which was 7.4 kilograms was used.
  • the diameter of the cylindrical portion of the rotor was 14.5 centimetres, and the maximum diameter of the conical takeup element was 16 centimetres.
  • the height of the spindle from the rotor base to the uppor portion of the shell element was 23.5 centimetres. The total height depends on the height of the package used, and the package carrying tube, corresponding to the tube 9 of FIG. 1, was suitably chosen.
  • the yarn being twisted was an ethylene polyterepthalate 65 denier, 33 filaments ply yarn, the initial twist of which was 20 turns per metre (S-twist).
  • the yarn was twisted in such manner as to obtain a final S-twist of 1100 turns per metre, the magnitude of the encircled are being two thirds of a turn.
  • the tensioning of the yarn was 11 grams, with a tension amplitude divergency of 10.5 gram.
  • EXAMPLE 2 In this example, the spindle and the mode of operation was identical to that of Example 1.
  • a polyhexamethylene adipamide 70 denier, 23 filaments ply yarn was twisted, the initial twist of which was 20 turns per metre (Z-twist) in such manner as to produce a final Z-twist of 500 turns per metre.
  • the yarn embraced the shell member by two thirds of a turn, and the winding on velocity of this was 37 metres per minute, the tension in the yarn being grams with an amplitude divergence of $0.5 gram.
  • EXAMPLE 3 In this example, the twisting was effected on a cellulose acetate 75 denier, 24 filaments ply yarn which had no initial twist, on a spindle generally similar to that used in Example 1.
  • -It was modified in such a manner that it was capable of receiving a package on a bobbin, the cup on the spindle being U-shaped in cross-section, having a diameter of 30 centimetres, and a height of 15 centimetres.
  • a 12 centimetres high and 26 centimetres in diameter bobbin carrying a 2.5 kilogram package was used.
  • tension was 13 grams, again with an amplitude divergence of :05 gram.
  • the yarn shell member was located at the upper portion of the spindle.
  • the shell member is located at the lower portion of the spindle.
  • the spindle of the present invention permits the twisting of packages of widely varying types and shapes, notably those of large dimensions, with tall packages such as cops, or wide packages such as those comprising artificial or synthetic yarns obtained by winding on at high velocity by peripheral driving following the spinning operation.
  • a double twist spindle comprising, in combination:
  • a method of double twisting a yarn in which the yarn is fed through a hollow rotatable double twist spindle and passed through a yarn guide to form a balloon, comprising the steps of:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US770769A 1967-10-25 1968-10-25 Double twist spindle and method of twisting Expired - Lifetime US3557541A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR125840 1967-10-25

Publications (1)

Publication Number Publication Date
US3557541A true US3557541A (en) 1971-01-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
US770769A Expired - Lifetime US3557541A (en) 1967-10-25 1968-10-25 Double twist spindle and method of twisting

Country Status (8)

Country Link
US (1) US3557541A (de)
BR (1) BR6803341D0 (de)
CH (1) CH502453A (de)
DE (2) DE1805274A1 (de)
ES (1) ES359550A1 (de)
FR (1) FR1553828A (de)
GB (1) GB1245010A (de)
NL (1) NL6814876A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3895484A (en) * 1972-04-11 1975-07-22 Hamel Gmbh Zwirnmaschinen Spinning apparatus
US3938309A (en) * 1972-05-30 1976-02-17 Hamel G.M.B.H., Zwirnmaschinen Spinning apparatus for glass-fiber yarn
US20060118327A1 (en) * 2000-12-26 2006-06-08 S&C Electric Company And Maclean Power, L.L.C. Method and arrangement for providing a gas-tight joint

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3150610A1 (de) * 1981-12-21 1983-06-30 Stuttgarter Spindelfabrik Novibra Gmbh, 7000 Stuttgart Doppeldraht-spindel

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3895484A (en) * 1972-04-11 1975-07-22 Hamel Gmbh Zwirnmaschinen Spinning apparatus
US3938309A (en) * 1972-05-30 1976-02-17 Hamel G.M.B.H., Zwirnmaschinen Spinning apparatus for glass-fiber yarn
US20060118327A1 (en) * 2000-12-26 2006-06-08 S&C Electric Company And Maclean Power, L.L.C. Method and arrangement for providing a gas-tight joint

Also Published As

Publication number Publication date
NL6814876A (de) 1969-04-29
GB1245010A (en) 1971-09-02
BR6803341D0 (pt) 1973-01-11
CH502453A (fr) 1971-01-31
DE1805274A1 (de) 1969-07-24
ES359550A1 (es) 1970-06-01
DE6803993U (de) 1972-11-23
FR1553828A (de) 1969-01-17

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