US3584450A - Process and device for the manufacture of textured yarns - Google Patents

Process and device for the manufacture of textured yarns Download PDF

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Publication number
US3584450A
US3584450A US811452A US3584450DA US3584450A US 3584450 A US3584450 A US 3584450A US 811452 A US811452 A US 811452A US 3584450D A US3584450D A US 3584450DA US 3584450 A US3584450 A US 3584450A
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United States
Prior art keywords
yarn
heating
false twisting
path
false
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Expired - Lifetime
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US811452A
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English (en)
Inventor
Henri Crouzet
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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    • 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
    • D02G1/0286—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 characterised by the use of certain filaments, fibres or yarns
    • 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
    • D02G1/0206—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 by false-twisting
    • 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
    • D02G1/0206—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 by false-twisting
    • D02G1/0266—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 by false-twisting false-twisting machines

Definitions

  • ABSTRACT An improvement relating to the environment of producing textured yarns, i.c., stretch or twist curled yarns. by a process involving the setting of a twist during cooling after heating of the yarn, the improvement relating to conducting such setting treatment of the moving yarn by making the yarn follow a lengthened distance comprising a winding or sinuous path between the heat treatment member and a subsequent deformation member i.e. a false twist spindle, to thereby cool the yarn.
  • the device or apparatus necessary to effect such winding or sinuous path of the heated textured yarn comprises a plurality of return means so arranged that the yarn takes the course of at least one loop, preferably a double loop in its path from a heating member to a subsequent deformation member.
  • the present invention relates to an improvement in a process for the manufacturing of textured yarns, e.g. stretch or twist curled yarns as well as an apparatus or device for carrying out such process; more particularly, the present invention relates to such process and apparatus wherein an improvement is provided whereby cooling and setting of a heated textured yarn is effected by making such yarn conform to a winding or sinuous path.
  • this type of yarn is generally prepared by a process which involves carrying out such steps in a single continuous operation, in particular by the application of a false twist.
  • a false twist it is possible in accordance with the presently conducted processes to apply the above three phases or steps of twisting, setting and untwisting in a continuous operation.
  • the freezing" or setting of the twist is effected during cooling, which cooling is conducted after heating, cancelling the internal tensions imparted to the yarn by the overtwist.
  • the new helicoidal form given to the synthetic yarn is set or more accurately frozen during the cooling of the yarn prior to the untwisting below the false twist spindle.
  • a certain distance covered by the yarn in free air is generally set between the false twist spindle and the outlet of the heating oven. As the heated yarn traverses this distance the twist imparted by the spindle backs up or winds up into the yarn.
  • the cooling of the yarn, particularly the synthetic yarn is particularly important on false twist texturing machines which rotate at a high speed, e.g., in the range of 100,000 turns/min. and even faster (up to 1,000,000 turns/min), particularly, in the case of high count yarns. Accordingly, in such environment the unsatisfactory nature of previously employed processes is particularly disadvantageous.
  • lt is yet a further object of the present invention to provide a simple and yet efficient means or system for eliminating the deficiencies of the prior art, such means relating to the manner in which the heated textured yarn travels between the heating oven and the deformation member in a system involving the twisting, setting and untwisting ofsynthetic yarns.
  • a still further object of the present invention comprises a process and apparatus by which the distance covered by the yarn between the heating oven and the deformation member is lengthened by making the yarn run along a sinuous or winding path, preferably in a form of at least one loop.
  • the tension of the yarn along the above described course varies slightly, due to a slight jamming effect, which effect only slightly breaks the backing up of the twist so that the yarn is in a relaxed state or condition in the heating oven and under a sufficient tension in the false twist spindle, with the resulting loss of twist being lower than that due to the friction in the heating oven.
  • Such a feature of this preferred embodiment of the present invention therefore eliminates the disadvantage associated with previously employed processes wherein breakage of the yarn frequently occurred due to excesses forces applied thereto.
  • the sinuous or winding path traveled by the yarn between the heating oven and a subsequent deformation member IS such that the yarn has the same direction at the entrance and the exit of the winding course but is set off or staggered so that the deformation member. i.e., false twlst spindle is removed from the axis of the heating oven.
  • This provides the additional advantage of removing the spindle from direct line with the shaft effect of the oven, while avoiding the risk of contact of the false twist spindle with the fumes of the textile oil solutions within the oven.
  • the sinuous or winding path taken by the yarn between the heating oven and subsequent deformation member will be in the form of an S-shaped double loop with parallel ends.
  • such course is variable in length so that the distance traveled by the heated textured yarn can be varied or adjusted according to operating conditions, i.e., nature of the yarn, count, winding speed, etc.
  • the form of the path traveled by the heated textured yarn is preferably at least one loop, it is most preferably in the form of an S-shaped double loop as set forth above.
  • a plurality of yarn return means are employed between the exit ofthe yarn from the heating element and the entry of the yarn into a deformation clement, i.e., false twist means.
  • at least one of such return means be adjustable in its position so that the length or distance traveled by the yarn between the heating element and deformation member can be varied.
  • these return means are composed of small wheels idly mounted on a fixed axle, or biconical fixed guides called diabolos" which permit the free upward motion or backing up ofthe false twist while maintaining a sufficient tension on the spindle to prevent the sliding of the twist on the locking means and a certain slack of the yarn in the heating box.
  • the fixed guides described above have a groove in which the yarn passes, the diameter of the fixed guides being between about and mm.
  • they are made of a hard smooth material such as a sintered oxide, such material having a friction factor or coefficient of friction with respect to the yarn which is sufficient to allow for the characteristics described above.
  • such return means are preferably combined with a heating box which is characterized by the fact that the same is pivotably mounted on a fixed axle and equipped with means to lock the heating box in a plurality of different positions.
  • a novel heating box arrangement associated with the apparatus of the present invention is advantageous in that it permits the same machine or apparatus to operate either in direct course between the heating element and the false twist element or to conveniently lengthen said course by making the yarn follow a winding path by being out of alignment with the subsequent deformation member.
  • the heating box may be straight or curved, closed or open, a curved box being particularly preferred.
  • FIGURE diagrammatically illustrates the apparatus of the present invention and the manner in which the yarn is forced to follow a sinuous or winding path between the heating box and subsequent deformation member.
  • a yarn 1 goes through a heating element composed of a curved pipe 2 of small caliber which is directly heated by an electric resistance such as described in French Pat. No. l,l40,992, showing a curvature of 2 centimeters for a total length of 1 meter.
  • the yarn I has purposely been removed from the wall of the pipe.
  • Pipe 2 is placed inside of a heating box 6 which is rotatively mounted around a pivot 7, offset with respect to the axis ofthe passage of the yarn l in the false twist spindle 8.
  • the yarn passes over fixed biconical guides 3, 4 and 5.
  • Guide 5 is preferably adjustable in its position, for example at 5', thus permitting varying of the length of the loop according to the operating conditions such as winding speed, titre of the yarn, etc.
  • the fixed box is locked into any of the positions indicated by any known means (not shown).
  • rollers 3 and 4 also have adjustable positions.
  • Return members 3, 4 and 5 are either small wheels idly mounted on fixed axles, or biconical fixed guides, currently called diabolos"; the latter insure a minimum loss of twist, as long as they have optimum size, advantageously between about 10 and 20 mm. They are preferably made of any hard and smooth material, such as sintered oxides.
  • Temperature ofoven 230 C. The yarn passed through the oven without any shrinkage or drawing.
  • the loss of strength is the same in both cases. It is equal to the loss of strength due to the false twist treatment, i.e., substantially 24 percent, the initial yarn having a breaking strength 0f5.6 g./den.
  • the elasticity has increased substantially in accordance with the present invention and that the yarn may be heat treated with a lesser elongation without drawing.
  • the result is that since the yarn is subjected to practically zero tension in the oven, the loss of twist is negligible, in the order of 50 turns/m., i.e., lower, at such speeds, than the loss of twist clue to friction in the heating element.
  • the friction on the return means is sufficient to insure a proper locking of the twist of the yarn on the twisting member, while permitting a low tension, nearly negligible, upon contact with the heating'element.
  • the knitted fabric made from a yarn according to the present invention shows a texture regularity comparable to that which can usually be obtained only through a setting treatment of the yarn itself with steam, Le, a slower discontinuous treatment which requires more manipulation and is therefore more expensive.
  • the process of the present invention is easy to apply with only minimum transformations in the equipment, and it permits a ,wide range of adjustments which are extremely simple to make.
  • Apparatus for false twisting a running length of thermoplastic yarn comprising means for directing yarn in a desired path of travel, said means including false twisting means positioned in the yarn path upstream of the false twisting means for heating the twisted yarn passing to said false twisting means, and guide means positioned in the yarn path between the false twisting means and the heating means for directing the yarn in a sinuous path to permit cooling of the yarn between the heating means and false twisting means while permitting substantially unrestricted passage of the twist imposed on the yarn from the false twisting means into the heating means.
  • said heating means includes a yarn outlet and adjustable means for varying the position of the outlet into and out of substantial alignment with said false twisting means to selectively bypass said guide means and shorten the path of travel of the yarn from the heating means to the false twisting means.
  • said heating means includes an elongated heating member through which said yarn passes
  • said adjustable means includes means for varying the angular position of said member to vary the position of the outlet end of said member into and out of substantial alignment with said false twisting means.
  • said false twisting means includes a false twist spindle
  • said heating member is normally positioned upstream and to one side of said false twist spindle
  • said guide means are positioned generally upstream said false twist spindle and beside said heating member
  • said heating member outlet is selectively positionable to be moved into axial alignment with said false twist spindle to thereby permit direct passage of running yarn to said spindle therefrom.
  • said heating member comprises a curved heater tube through which the yarn being heated passes.
  • said guide means includes a plurality of spaced guides for supportably engaging the yarn, at least one of said guides being positionally adjustable to selectively lengthen or shorten the yarn path between said heating means and said false twisting means.
  • Apparatus for false twisting a running length of thermoplastic yarn comprising means for directing yarn in a desired path of travel, said means including false twisting means including a false twist spindle positioned in the path of travel for twisting the moving yarn, yarn heating means having a yarn outlet normally positioned below and generally to one side of said false twist spindle for heating the yarn passing to said false twisting means, guide means including a plurality of spaced yarn guides positioned generally below said false twist spindle for normally directing yarn from said yarn outlet to said spindle in a sinuous path to permit cooling of the yarn between the heating means and false twisting means, and means for selectively positioning the yarn outlet of said heating means in axial alignment with said false twist spindle to selectively bypass said guide means and shorten the path of travel of the yarn from the heating means to the false twisting means.
  • said heating means includes a yarn heater tube
  • said means for selectively positioning the yarn outlet of the heating means includes means for varying the angular position of said heating tube to vary the position of the yarn outlet thereof.
  • heating means further includes a heater box surrounding said heater tube
  • adjustable means includes means mounting said heater box and heater tube for pivotal movement about a lower comer portion of said box.
  • thermoplastic yarn comprising the steps of sequentially passing the yarn through a heating zone, a cooling zone, and a false twisting zone; the improvement wherein the: yarn is passed through said cooling zone in a sinuous path while permitting substantially unrestricted passage of twist from said false twisting zone into said heating zone.
  • a process as defined in claim 15 including the step of reducing the tension in the yarn in the heating zone below that in the false twisting zone while processing the yarn.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US811452A 1968-03-29 1969-03-28 Process and device for the manufacture of textured yarns Expired - Lifetime US3584450A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR69049839 1968-03-29

Publications (1)

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US3584450A true US3584450A (en) 1971-06-15

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US811452A Expired - Lifetime US3584450A (en) 1968-03-29 1969-03-28 Process and device for the manufacture of textured yarns

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US (1) US3584450A (enrdf_load_stackoverflow)
AT (1) AT325192B (enrdf_load_stackoverflow)
BE (1) BE729029A (enrdf_load_stackoverflow)
CH (3) CH569104A5 (enrdf_load_stackoverflow)
DE (1) DE1916144B2 (enrdf_load_stackoverflow)
DK (1) DK138805C (enrdf_load_stackoverflow)
FR (1) FR1583799A (enrdf_load_stackoverflow)
GB (1) GB1231331A (enrdf_load_stackoverflow)
NL (1) NL163828C (enrdf_load_stackoverflow)
SE (1) SE344343B (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3999360A (en) * 1975-02-25 1976-12-28 Ateliers Roannais De Constructions Textiles Machine for the texturation of textile yarn
US4883796A (en) * 1987-02-13 1989-11-28 Heinrich Mack Nachf. Oxime ethers of 2,6-dioxabicyclo(3.3.0)octanones, and compositions and methods for treatment of a cardiac disease or circulatory with them
US5649345A (en) * 1995-02-17 1997-07-22 Menegatto S.R.L. Texturing machine with heat exchanger for forced yarn cooling
CN115323546A (zh) * 2022-09-19 2022-11-11 华祥（中国）高纤有限公司 一种化纤丝加弹设备用假捻装置以及生产工艺

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0089005B1 (en) * 1982-03-16 1987-09-09 Teijin Limited Textured yarn and method and apparatus for producing the same
DE3311777C2 (de) * 1983-03-31 1987-10-01 D.I.E.N.E.S. Apparatebau GmbH, 6052 Mühlheim Vorrichtung zur Wärmebehandlung synthetischer Fäden

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3999360A (en) * 1975-02-25 1976-12-28 Ateliers Roannais De Constructions Textiles Machine for the texturation of textile yarn
US4883796A (en) * 1987-02-13 1989-11-28 Heinrich Mack Nachf. Oxime ethers of 2,6-dioxabicyclo(3.3.0)octanones, and compositions and methods for treatment of a cardiac disease or circulatory with them
US5649345A (en) * 1995-02-17 1997-07-22 Menegatto S.R.L. Texturing machine with heat exchanger for forced yarn cooling
CN115323546A (zh) * 2022-09-19 2022-11-11 华祥（中国）高纤有限公司 一种化纤丝加弹设备用假捻装置以及生产工艺

Also Published As

Publication number Publication date
DK138805C (da) 1979-04-02
CH463569A4 (enrdf_load_stackoverflow) 1976-04-30
NL163828C (nl) 1980-10-15
SE344343B (enrdf_load_stackoverflow) 1972-04-10
DE1916144B2 (de) 1975-09-25
DK138805B (da) 1978-10-30
AT325192B (de) 1975-10-10
FR1583799A (enrdf_load_stackoverflow) 1969-12-05
GB1231331A (enrdf_load_stackoverflow) 1971-05-12
CH580179B5 (enrdf_load_stackoverflow) 1976-09-30
NL6904236A (enrdf_load_stackoverflow) 1969-10-01
DE1916144A1 (de) 1969-10-09
CH569104A5 (enrdf_load_stackoverflow) 1975-11-14
BE729029A (enrdf_load_stackoverflow) 1969-08-01
NL163828B (nl) 1980-05-16

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