US3561045A - Apparatus for manufacture of filaments of varying denier - Google Patents

Apparatus for manufacture of filaments of varying denier Download PDF

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Publication number
US3561045A
US3561045A US837045A US3561045DA US3561045A US 3561045 A US3561045 A US 3561045A US 837045 A US837045 A US 837045A US 3561045D A US3561045D A US 3561045DA US 3561045 A US3561045 A US 3561045A
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US
United States
Prior art keywords
band
roll
filament
matt
yarn
Prior art date
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
Application number
US837045A
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English (en)
Inventor
Peter Heffernan
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.)
Akzo Nobel UK PLC
Original Assignee
Courtaulds PLC
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
Publication date
Application filed by Courtaulds PLC filed Critical Courtaulds PLC
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Publication of US3561045A publication Critical patent/US3561045A/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
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/20—Formation of filaments, threads, or the like with varying denier along their length
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
    • D02J1/225—Mechanical characteristics of stretching apparatus
    • D02J1/226—Surface characteristics of guiding or stretching organs

Definitions

  • a filament-drawing apparatus for imparting to a thermoplastic filament a lengthwise variation of denier, comprising a feed roll, a draw roll, a matt circumferential band and a mirror-finish circumferential band on the cylindrical surface of the draw roll, a separator roll having a matt cylindrical surface and a filament deflector, for example a rotary cam, arranged to deflect intermittently the filament from contact with one band into contact with the other band.
  • T his invention relates to the manufacture of a variable denier, thermoplastic filament, for example of nylon or polyester.
  • a filament-drawing apparatus for imparting to a thermoplastic filament a lengthwise variation of denier, comprises a feed roll, a draw roll, a matt circumferential band and a mirrorfinish circumferential band on the cylindrical surface of the draw roll, a separator roll having a matt cylindrical surface and a filament deflector arranged to deflect intermittently the filament from contact with one band into contact 'with the other band.
  • the invention includes the process of imparting a lengthwise variation in denier to a thermoplastic filament by metering the undrawn filament, passing the filament in less than 2 turns about a separator roll and a draw roll, the separator roll having a matt cylindrical surface and the draw roll having a matt circumferential band and a mirror-finish circumferential band on its cylindrical surface, and intermittently deflecting the filament from contact with one band into contact with the other.
  • FIG. 1 is an elevation of a station on a draw-twister
  • FIG. 2 is a profile of a cam.
  • an unstretched multifilament yarn passes by way of a cott roller 2 and a feed roll 3 to be wound in one turn about a draw roll 4 and a separator roll 5 and thence through a guide 6 and a ring-spinning collection device 7 onto a package 8.
  • the separator roll 5 is spaced from the draw roll 4 and has its axis of rotation slightly inclined to the axis of the draw roll.
  • the cylindrical surface of the draw roll 4 is divided into two contiguous circumferential bands, one band 9 is matt and the other 10 is polished to a mirror-finish.
  • the separator roll 5 has a matt cylindrical surface. Between the feed roll 3 and the draw roll 4, a cam 11 is mounted on a driven shaft 12, alongside the yarn 1.
  • the cam 11 has a profile incorporating a smalled diameter are 13 and a larger diameter are 14. As shown in FIG. 1, when the smaller diameter are 13 of the cam profile is in contact with the yarn 1 it does not deflect the yarn 1 from its natural straight path between the feed roll 3 and the polished band 10 on the draw roll 4. However, when the cam 11 is rotated so that the yarn 1 is in contact With the larger diameter are 14, the yarn is deflected to the yarn path 1A shown in broken line. The deflection causes the yarn wrapped on the draw roll 4 and separator roll 5 to move from the polished band 10 to the matt band 9.
  • a difference in the grip of the bands 9 and 10 on the yarn was always found when the visual appearance of the bands was matt and polished respectively.
  • a further definition of roughness of a band was needed to distinguish degrees of difference in the performance of various paired bands.
  • a commercially available device was employed to characterise the surfaces of the bands one in which a sensitive finger traversed a line in contact with the surface registering the spacing of the micropeaks thereon.
  • the polished band 10 had closely spaced micropeaks and the matt surface more separated micropeaks. It is preferred that the polished surface should have a roughness, i.e. an average spacing of peaks of at most 0.2 micron and better still at most 0.15 micron, whilst the matt surface preferably should have a roughness of at least 1 micron, say in the range of 1.25 to 1.4 micron.
  • the dwell time of the yarn wraped on the draw roll 4 and the separator roll 5, on the bands 9 and 10 is determined by the angles a and B subtended by the larger and smaller diameter arcs 14 and 13 respectively, and the speed of revolution of the cam 11, which may be varied to randomise the length and spacing of thicker parts of the drawn yarn.
  • the apparatus was employed to stretch a yarn of sixteen polycaproamide filaments with a ratio of the peripheral speeds of the draw roll 4 and the feed roll 3 of 3.12:1.
  • the yarn was wrapped 1 /2 times on the roll 2 and once on the draw roll 4 and separator roll 5.
  • the peripheral speed of the draw roll was 730 metres/minute and the spindle speed of the collection device 7,500 revolutions per minute.
  • the larger diameter arc 14 had a radius of 3.5 ems. and a subtended angle, a, of
  • the cam 11 was rotated at 626 revolutions per minute for Series A and at 376 revolutions per minute for Series B.
  • the analysis of the yarns made in both series is presented in the following table.
  • a filament-drawing apparatus for imparting to thermoplastic filament a lengthwise variation of denier, comprising a feed roll, a draw roll, a matt circumferential band and a mirror-finish circumferential band on the cylindrical surface of the draw roll, a separator roll having a matt cylindrical surface and a filament deflector arranged to deflect intermittently the filament from contact with one band into contact with the other band.
  • a filament drawing apparatus as claimed in claim 1 in which the filament deflector is a cam and driving means to rotate the cam.
  • a filament drawing apparatus as claimed in claim 2 in which the matt circumferential band has a roughness of at least 1 micron and the mirror-finish circumferential band has a roughness of at most 0.2 micron.
  • a filament-drawing apparatus for imparting a lengthwise variation of denier to a thermoplastic filament, comprising a feed roll, a draw roll, a matt circumferential separator roll having a matt cylindrical surface, a cam and driving means therefor, arranged to deflect the filament laterally from contact with one band into contact with the other band and to allow the filaments to revert,

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US837045A 1968-07-05 1969-06-27 Apparatus for manufacture of filaments of varying denier Expired - Lifetime US3561045A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3212868 1968-07-05

Publications (1)

Publication Number Publication Date
US3561045A true US3561045A (en) 1971-02-09

Family

ID=10333714

Family Applications (1)

Application Number Title Priority Date Filing Date
US837045A Expired - Lifetime US3561045A (en) 1968-07-05 1969-06-27 Apparatus for manufacture of filaments of varying denier

Country Status (8)

Country Link
US (1) US3561045A (ja)
BE (1) BE735609A (ja)
CH (1) CH511957A (ja)
DE (1) DE1933905A1 (ja)
FR (1) FR2012422A1 (ja)
GB (1) GB1264327A (ja)
NL (1) NL6910355A (ja)
SE (1) SE346820B (ja)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3715421A (en) * 1970-04-15 1973-02-06 Viscose Suisse Soc D Process for the preparation of polyethylene terephthalate filaments
US3831874A (en) * 1971-09-22 1974-08-27 K Andrew Yarn drive roller
US3914835A (en) * 1974-01-14 1975-10-28 Dow Badische Co Apparatus for drawing and crimping synthetic yarn
US3917185A (en) * 1972-11-24 1975-11-04 Sonoco Products Co Business machine core
US4214508A (en) * 1977-10-13 1980-07-29 Philip Morris Incorporated Method and apparatus for making cigarette filters of filamentary material
US4351492A (en) * 1978-11-07 1982-09-28 Teijin Limited Method for threading a yarn delivered from a godet roller on a bobbin and an apparatus for effecting the same
US4953348A (en) * 1988-07-11 1990-09-04 Chen Jen F Synchronous yarn feeding device
US4998942A (en) * 1989-12-27 1991-03-12 Milliken Research Corporation Snubber profile
US5183620A (en) * 1990-08-01 1993-02-02 E. I. Du Pont De Nemours And Company Process of drawing yarn using an oscillating draw assist element
US5333364A (en) * 1991-12-04 1994-08-02 Guilford Mills, Inc. Method for producing random yarn denier variations on draw warping machines

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3068087D1 (en) * 1980-03-06 1984-07-12 Philip Morris Inc Method for providing an article of manufacture comprised of elongate filamentary material and apparatus for carrying out this method
EP0124481B2 (de) * 1983-04-22 1995-06-28 Rhône-Poulenc Viscosuisse SA Vorrichtung zur Übertragung hoher Geschwindigkeiten auf einen laufenden Faden und Verfahren zum Anlegen dieses Fadens

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3715421A (en) * 1970-04-15 1973-02-06 Viscose Suisse Soc D Process for the preparation of polyethylene terephthalate filaments
US3831874A (en) * 1971-09-22 1974-08-27 K Andrew Yarn drive roller
US3917185A (en) * 1972-11-24 1975-11-04 Sonoco Products Co Business machine core
US3914835A (en) * 1974-01-14 1975-10-28 Dow Badische Co Apparatus for drawing and crimping synthetic yarn
US4214508A (en) * 1977-10-13 1980-07-29 Philip Morris Incorporated Method and apparatus for making cigarette filters of filamentary material
US4351492A (en) * 1978-11-07 1982-09-28 Teijin Limited Method for threading a yarn delivered from a godet roller on a bobbin and an apparatus for effecting the same
US4953348A (en) * 1988-07-11 1990-09-04 Chen Jen F Synchronous yarn feeding device
US4998942A (en) * 1989-12-27 1991-03-12 Milliken Research Corporation Snubber profile
US5183620A (en) * 1990-08-01 1993-02-02 E. I. Du Pont De Nemours And Company Process of drawing yarn using an oscillating draw assist element
US5333364A (en) * 1991-12-04 1994-08-02 Guilford Mills, Inc. Method for producing random yarn denier variations on draw warping machines

Also Published As

Publication number Publication date
GB1264327A (ja) 1972-02-23
FR2012422A1 (ja) 1970-03-20
BE735609A (ja) 1969-12-16
DE1933905A1 (de) 1970-01-15
CH511957A (de) 1971-08-31
NL6910355A (ja) 1970-01-07
SE346820B (ja) 1972-07-17

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