US3835632A - Draw-texturing apparatus - Google Patents

Draw-texturing apparatus Download PDF

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Publication number
US3835632A
US3835632A US00408322A US40832273A US3835632A US 3835632 A US3835632 A US 3835632A US 00408322 A US00408322 A US 00408322A US 40832273 A US40832273 A US 40832273A US 3835632 A US3835632 A US 3835632A
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Prior art keywords
roller
yarn
draw
delivery roller
pin
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Expired - Lifetime
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US00408322A
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English (en)
Inventor
T Kishida
M Terano
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Teijin Ltd
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Teijin Ltd
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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
    • D02G1/0206—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
    • D02G1/0213—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 after drawing the yarn on the same machine

Definitions

  • the present invention relates to a draw-texturing apparatus. More particularly, the invention relates to an improved apparatus for manufacturing false twisted and crimped yarns at high efficiency by drawing and false twisting multifilamentary yarns of thermoplastic synthetic fibers such as polyester and polyamide fibers.
  • thermoplastic synthetic fibers such as polyester and polyamide fibers are prepared by drawing spun filamentary yarns at a prescribed draw ratio to orient fiber-constituting molecules and attaining desired strength and elongation, and thereafter, false twisting the so drawn yarns.
  • a draw-texturing apparatus wherein a pin is disposed at a position in the proximity of a yarn passage between a feed roller for taking a yarn from an undrawn yarn supply source and feeding the yarn into the apparatus and a first delivery roller paired with a separate roller, so that the pin crosses the yarn passage and the axis of the delivery roller transversely and the pin is reciprocated in the direction of said axis, and wherein means for positively preventing twist run-back into the upstream yarn passage beyond said first delivery roller is mounted.
  • FIG. 1 is a perspective view illustrating the drawtexturing apparatus of this invention.
  • FIG. 2 is a sectional side view illustrating an embodiment of the pin-reciprocating mechanism in the apparatus shown in FIG. I, and;
  • FIG. 3 is a perspective view illustrating an embodiment of the yarn-nipping mechanism in the apparatus shown in FIG. 1.
  • undrawn yarn Y is taken out of a package 1 of undrawn yarn and fed to a drawing zone by means of a feed roller 3 pressed by a cot roller 2 where the yarn is turned between a multi-grooved guide 2 and the cot roller 2. Then, the yarn contacts a draw pin 4 (there may be a plurality of pins) and then is wound by a draw roller 5 (first delivery roller) and a separate roller 5 paired therewith. Between the feed roller 3 and draw roller 5 the yarn is drawn at a prescribed draw ratio (usually at a draw ratio of 1.3 to 4.0).
  • the so drawn yarn Y is contacted with a grooved heater 6 and heated by said heater, and thus, twists given to the yarn by false-twisting means 7 are thermally set and fixed. Then, the yarn arrives, while being untwisted, at a stretch roller 8 (second delivery roller).
  • a yarn-breakage detecting means 31 at a portion of the take-up means 9 and a yarn cutter 32 at a position upstream of the feed roller 3 whereby the supply of the undrawn yarn is stopped at the time of yarn-breakage.
  • the falsetwisting means there may be employed false-twisting spindles, false twisters of the frictional system using twist bushes, discs, friction ropes, etc. and other means.
  • the so drawn and false twisted yarn is formed in a package by take-up means 9 such as a ring twister, a friction roller type winder and a spindle type winder.
  • the undrawn yarn may be introduced into the apparatus from a creel truck, on which undrawn yarn packages are mounted, conveyed on the upper portion of the apparatus.
  • the draw pin 4 is reciprocated in the direction of the axis of the draw roller 5 as indicated by an arrow A in the drawings and simultaneously, a nip roller 11 coated with an elastic member such as rubber is pressed against the draw roller 5 to nip the yarn wound on said roller 5.
  • the nip roller 11 is so arranged that at least one turn of the yarn about the draw roller 5 at the feeding-in side thereof is not nipped.
  • the draw pin 4 is fixed via an arm on a slide bar 13 extending in the longitudinal direction of the machine, and this slide bar 13 is slidably supported on a guide bracket 14 and always pressed against a rotated and driven eccentric cam 16 by a repulsive force of a spring 18.
  • This eccentric cam 16 is held on a bracket 19 by means of a bearing 17 and is attached eccentrically to a shaft 15 rotated by a suitable rotating and driving device (not shown), in such a manner that the cam is swung and rolled in correspondence to the rotation of the shaft 15.
  • the draw pin 4 is pressed against this eccentric cam 16 via the slide bar 13 and it is reciprocated in the direction indicated by the arrow A by an eccentric amount of twice the eccentric amount ofe of the eccentric cam during one rotation of said cam l6, or 2e.
  • the mechanism for nipping the discharge side of the yarn will now be described with reference to FIG. 3.
  • the nip roller 11 is fixedly mounted on an arm 21 pivoted at an end thereof and the other end of this arm 21 is connected to a spring 22, so that the nip roller 11 is pressed against the draw roller by an attractive force of the spring 22.
  • the yarn is nipped between the draw roller 5 and the nip roller 11.
  • the twist run-back preventing means for example, a tensor, disposed between the first delivery roller and the heater, cooperating with the pin may be utilized instead of the above-mentioned nip roller.
  • the uneven twisting among fiiaments and in the yarn portions caused by the foregoing undesirable phenomena can be completely prevented, with the result that when crimped yarns manufactured by the apparatus of this invention are formed into knitted articles or woven fabrics, the occurrence of such objectionable features as short term flashes and non-uniformity of dyeability can be greatly reduced and the quality of the products can be greatly improved.
  • the draw pin since the draw pin is reciprocated, the yarn disposed under high tension between the feed roller and draw roller can be moved easily and assuredly. Moreover, since the yarn-pressing point of the nip roller is displaced in the axial direction with the lapse of time, abrasion of specific points of the nip roller by a drilling action of twisted yarns can be prevented. and there is attained such a secondary effect that the life ofthe nip roller can be prolonged several times as compared with the case where the draw pin is not reciprocated.
  • the nip roller 11 is coated with a urethane rubber having a Shore hardness A of 55 to 85.
  • a urethane rubber having a hardness within the above range is used as a coating of the nip roller, twist run-back of the yarn can be definitely stopped at the nip point, and even when the yarn is broken at a point after the draw roller, it is not wound on such a urethane rubber-coated nip roller but is wound on the draw roller composed of a mirrorpolished metal, and the nip roller is not damaged at all.
  • the nip roller when the nip roller is coated with an NBR (nitrilbutadiene rubber), SBR (butadiene-styrene rubber) or the like, the broken yarn is wound on the soft nip roller, though the reason has not been elucidated, and the roller is so damaged that it cannot be used any longer and it should be exchanged for a new one, which results in troubles and difficulties in the apparatus maintenance.
  • NBR nitrilbutadiene rubber
  • SBR butadiene-styrene rubber
  • the draw pin is heated.
  • the feed roller may also be heated.
  • a second heater is optionally disposed between the stretch roller and takeup means, so that the elasticity and elongation of the resulting crimped yarn are maintained at desired levels.
  • the false-twist processing can be accomplished simultaneously with the drawing operation, by appropriately changing the peripheral speed of the draw roller.
  • EXAMPLE 1 With use of the apparatus of this invention such as illustrated in H65. 1, 2 and 3, a nylon yarn of 20 deffi fil was drawn at a draw ratio of 3.30 and falsely twisted by employing a twist bush as false-twisting means 7. During this operation, the reciprocating displacement of the draw pin was adjusted to 2 mm, and the reciprocating movement was conducted continuously at a frequency of one cycle per hour. Yarn take up speed was 500 m/min.
  • EXAMPLE 2 A nylon yarn of 18 de/6 fil was drawn and falsely twisted under the same conditions as in Example 1 except that the frequency of the reciprocating movement of the draw pin was changed to 6 cycles per hour and the yarn take up speed was 800 the resulting crimped yarn, m/min.
  • the non-uniform knitting preventive effect was ofa grade of4 to 5.
  • the grade of the nonuniformity knitting preventive effect was 3.0. From these results, it will readily be understood that the quality of the resulting crimped yarn is highly improved when the apparatus of this invention is employed.
  • EXAMPLE 3 A polyester yarn of 150 de/36 fil was drawn at a draw ratio of 2.80 and falsely twisted by means of the apparatus of this invention such as illustrated in the drawings.
  • the draw pin was heated and a false-twist spindle was employed as the false-twisting means 7.
  • the displacement distance of the reciprocating movement of the draw pin was adjusted to 3 mm, the frequency of the reciprocating movement was 10 cycles per hour and the yarn take up speed was set at 200 m/min.
  • the resulting crimped yarn was knitted into a hosiery article and it was subjected to the dyeing test to evaluate dyeability.
  • the same starting filamentary yarn was treated by means of conventional apparatus in which the draw pin was not reciprocated and no nip roller was provided, and the resulting crimped yarn was knitted into a hosiery article.
  • the comparative sample was similarly subjected to the dyeing test. As a result of naked eye observation, it was found that occurrence of non-uniform dyeability was much more reduced in the sample according to this invention than in the comparative sample and the quality of the resulting crimped yarn can be greatly improved by use of the apparatus of this invention.
  • a draw-texturing apparatus for draw-falsetwisting filamentary yarns of thermoplastic synthetic fibers which comprises a source of undrawn yarn, a
  • feed roller for feeding a yarn taken out of said yarn source
  • a first delivery roller paired with a separate roller disposed at a position downstream of said feed roller, a pin disposed at a position in the proximity of a yarn passage between said feed roller and said first delivery roller in transversal condition to said yarn passage
  • a heater mounted at a position downstream of said first delivery roller for thermally setting and fixing a yarn delivered from said first delivery roller in the twisted state
  • take-up means for winding the false twisted yarn on a bobbin
  • a second delivery roller disposed between said false-twisting means and said take-up means, said first delivery roller having an axis disposed transversely to an axis of said pin, the improvement comprising in combination, means for reciprocating said pin substantially in the direction of the axis of said first delivery roller and means for positively preventing twist run-back into the upstream yarn passage beyond said first delivery roller.
  • a draw-texturing apparatus wherein said twist running back preventing means is a nip roller for nipping the yarn wound on said first delivery roller.
  • a draw-texturing apparatus wherein said nip roller is urged to said first delivery roller so that it does not nip at least one turn of said yarn about said first delivery roller at the feeding-in side thereof.
  • a draw-texturing apparatus wherein said nip roller is coated with a urethane rubber having a Shore hardness A of 55 to 85.
  • a draw-texturing apparatus comprising a bar rigidly supporting said pin and a cam means for reciprocately displacing said bar, a driving means for periodically driving said cam means with a predetermined frequency.
  • a draw texturing apparatus according to claim 1 wherein said pin is heated.
  • a draw texturing apparatus according to claim 1 wherein a second heater is disposed between said stretch roller and said take up means.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US00408322A 1972-10-30 1973-10-23 Draw-texturing apparatus Expired - Lifetime US3835632A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47107844A JPS5021567B2 (US06566495-20030520-M00011.png) 1972-10-30 1972-10-30

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US3835632A true US3835632A (en) 1974-09-17

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US00408322A Expired - Lifetime US3835632A (en) 1972-10-30 1973-10-23 Draw-texturing apparatus

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US (1) US3835632A (US06566495-20030520-M00011.png)
JP (1) JPS5021567B2 (US06566495-20030520-M00011.png)
DE (1) DE2353567B2 (US06566495-20030520-M00011.png)
FR (1) FR2204720B1 (US06566495-20030520-M00011.png)
GB (1) GB1422858A (US06566495-20030520-M00011.png)
IT (1) IT999044B (US06566495-20030520-M00011.png)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4026098A (en) * 1976-02-26 1977-05-31 E. I. Du Pont De Nemours And Company Production of yarn of polyester filaments having a random distribution along the filament length of thick and thin sections differing in dyeability
US4118955A (en) * 1976-10-19 1978-10-10 Universal Maschinenfabrik Dr. Rudolf Schieber Kg Yarn feed arrangements for knitting machines
CN111768928A (zh) * 2020-09-02 2020-10-13 南昌冠东科技有限公司 一种抽杆式光电传输复合缆高效率退扭装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2918778A (en) * 1957-04-19 1959-12-29 Universal Winding Co Textile machine
US3041813A (en) * 1959-07-09 1962-07-03 Heberlein Patent Corp Method and apparatus for producing crimped synthetic yarn
US3067563A (en) * 1958-05-24 1962-12-11 American Enka Corp Method and apparatus for texturizing yarn
US3708969A (en) * 1969-10-24 1973-01-09 C Nitschke Thread guide roller
US3729916A (en) * 1971-03-30 1973-05-01 Beaunit Corp Method for treating yarn
US3793817A (en) * 1972-06-12 1974-02-26 Allied Chem Auxiliary yarn start-up wheel and method for draw false twist machines

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1472643A (fr) * 1965-03-25 1967-03-10 Ici Ltd Appareil d'étirage
ZA694221B (en) * 1968-06-18 1971-01-27 Klinger Mfg Co Ltd Yarn processing apparatus
GB1280168A (en) * 1969-12-16 1972-07-05 Tmm Research Ltd Improvements in the treatment of synthetic yarns

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2918778A (en) * 1957-04-19 1959-12-29 Universal Winding Co Textile machine
US3067563A (en) * 1958-05-24 1962-12-11 American Enka Corp Method and apparatus for texturizing yarn
US3041813A (en) * 1959-07-09 1962-07-03 Heberlein Patent Corp Method and apparatus for producing crimped synthetic yarn
US3708969A (en) * 1969-10-24 1973-01-09 C Nitschke Thread guide roller
US3729916A (en) * 1971-03-30 1973-05-01 Beaunit Corp Method for treating yarn
US3793817A (en) * 1972-06-12 1974-02-26 Allied Chem Auxiliary yarn start-up wheel and method for draw false twist machines

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4026098A (en) * 1976-02-26 1977-05-31 E. I. Du Pont De Nemours And Company Production of yarn of polyester filaments having a random distribution along the filament length of thick and thin sections differing in dyeability
US4118955A (en) * 1976-10-19 1978-10-10 Universal Maschinenfabrik Dr. Rudolf Schieber Kg Yarn feed arrangements for knitting machines
CN111768928A (zh) * 2020-09-02 2020-10-13 南昌冠东科技有限公司 一种抽杆式光电传输复合缆高效率退扭装置
CN111768928B (zh) * 2020-09-02 2021-01-08 山东华宁电伴热科技有限公司 一种抽杆式光电传输复合缆高效率退扭装置

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Publication number Publication date
JPS4966912A (US06566495-20030520-M00011.png) 1974-06-28
JPS5021567B2 (US06566495-20030520-M00011.png) 1975-07-24
FR2204720A1 (US06566495-20030520-M00011.png) 1974-05-24
FR2204720B1 (US06566495-20030520-M00011.png) 1976-05-14
DE2353567A1 (de) 1974-05-30
DE2353567B2 (de) 1976-04-01
GB1422858A (en) 1976-01-28
IT999044B (it) 1976-02-20

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