US3123891A - Apparatus for drawing textile filaments - Google Patents

Apparatus for drawing textile filaments Download PDF

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Publication number
US3123891A
US3123891A US3123891DA US3123891A US 3123891 A US3123891 A US 3123891A US 3123891D A US3123891D A US 3123891DA US 3123891 A US3123891 A US 3123891A
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Prior art keywords
roll
filaments
strips
draw roll
draw
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    • 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
    • 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
    • D01D5/12—Stretch-spinning methods
    • D01D5/16—Stretch-spinning methods using rollers, or like mechanical devices, e.g. snubbing pins

Definitions

  • This invention relates to apparatus for longitudinally forwarding textile filaments. More particularly, this invention relates to apparatus for stretching continuous textile filaments employing a novel draw roll.
  • a stretching assembly including a pair of feed rolls and a draw roll, together with an associated separator roller, is conventionally used.
  • the peripheral speed of the draw roll in relation to the peripheral speed of the feed roll is adjusted such that the filaments are stretched the desired extent.
  • the draw roll causes the filaments being supplied to it to be under considerable tension. To prevent slippage of the filaments around the draw roll and the separator roll, it has been found that several wraps therearound are necessary.
  • the efiiciency of the drawingoperation, as well as the yarn quality depends to a large extent upon the character of the surface of the draw roll. -In general, there are two types of surfaces in use, each having special advantages and disadvantages.
  • One type of surface is known as a mirror surface obtained by polishing the surface of a metal roll so that it has practically no roughness.
  • the other type of surface is known as a matte surface and is roughened such as by impinging an abrasive against the surface. gripped more by the filaments; and accordingly, less wraps around the draw roll are required to stretch the filaments.
  • the filaments there is an undesirable tendency for the filaments to cling to the surface of the roll. Vlhen the filaments leave the roll and are directed therefrom, individual filaments flit or flutter at the point of withdrawal, since the filaments will tend to follow the periphery of the roll. rise to filament breaking and causes a reduction in yarn quality.
  • Another object of the present invention is to provide a draw roll assembly comprising a driven roll and an associated separator roll, said driven roll having a particular surface whereby textile filaments can be placed under considerable tension in an effective manner while maintaining satisfactory filament quality.
  • the smoothmirror surface is' This fugitive wrapping tendency givesgreater than percent polished surface area, the quality of the drawn filaments notably diminishes in that the fila-" 3,123,891 Patented Mar. 10, 1964
  • the objects in general are accomplished in the provi sion of novel apparatus adapted to draw textile filaments.
  • the apparatus comprises means to supply textile filaments from a source at a predetermined speed and a metal cylindrical draw roll adapted to be driven so that the filaments normally being supplied to it are under considerable tension.
  • the draw roll carries a plurality of polished surface strips and a plurality of roughened surface strips on the yarn engaging peripheral area thereof.
  • the strips are substantially parallel and extend axially of the draw roll with the polished strips and the roughened strips following one another consecutively about the periphery of the draw roll.
  • the total surface area of the polished strips constitutes 5080 percent of the total yarn engaging peripheral area of the draw roll.
  • a separator roll is mounted adjacent the said draw roll in spaced relationship therewith and is positioned so that the axis of the separator roll is disposed at a slight angle with respect to the axis of the draw roll in order that the filaments normally progressing around the draw roll and the separator roll will describe generally a helix, the convolutions of which are spaced apart.
  • the feed roll assembly which is adapted to supply filaments 11 from a source.
  • the feed roll assembly comprises two rotatably mounted rolls 12 and 13, at least one of which is positively driven.
  • Roll 13 is connected with a drive motor 14 so that it is driven with the roll 12 being an idler roll.
  • the rolls engage each other so that the filaments are nipped sufficiently that they do not slip therethrough when tensioned in the yarn path beyond the two rolls.
  • a draw roll 15 is rotatably mounted on shaft 16. Connected with this shaft is a motor 17 which drives the roll 15 at a predetermined speed.
  • the surface of the roll 15 is provided with a plurality of strips 18 which extend axially of the rolls and are substantially parallel to each other. Strips 18 are roughened to have What is called a matte finish. Such finish can be obtained by blasting an abrasive against the portions of the rolls, which are to be roughened. The blasting produces craters and irregular ridges therebetween.
  • the depth of the craters may be in the range of about 20 to microinches and the width thereof may be in the range of 0.0005 to 0.005 inch.
  • Positioned sequentially between roughened strips 18 are polished strips 19.
  • the polished strips may be regarded as having a mirror finish which can be obtained by polishing the metal roll in a conventional manner.
  • the length of the strips 18 and 19 may vary but are sufficient that multiple passes of the filaments can be made therearound Without superpositioning thereof.
  • the number of passes around the roll is determined by the roll size and the amount of tension required on the filaments between the feed roll assembly and the roll 15.
  • a separator roll 20, preferably of much smaller diameter is associated with draw roll 16.
  • the axis of roll 20 is at an angle with respect to the axis of roll to provide longitudinal advancement of the filaments.
  • roll is freely rotatably mounted and is positioned adjacent to draw roll 15.
  • Roll 15 is adapted to be rotated at a rate such that its peripheral speed exceeds the peripheral speed of rolls 12 and 13 so that the filaments are stretched a predetermined amount.
  • a snubbing pin 21 is mounted in the yarn path so as to be non-rotative and over which the filaments are wrapped a desired number of times. After being drawn the filaments are taken up in an orderly manner such as by the use of a conventional winder, ring twister, or the like.
  • filaments 11 are led through the nip of rolls 12 and 13 which are driven at a predetermined peripheral speed.
  • the filaments are wrapped around pin 21 and then a suitable number of times around the stripped roll 15 and its associated roll 20.
  • Roll 15 is driven so that the filaments before reaching the roll 15 are under considerable tension.
  • the filaments can be tensioned with a minimum number of wraps being required to be taken around the roll 15 and separator roll 20 to prevent slippage therearound. Also, the flicking of the filaments at the point where they are removed tangentially from roll 15 is minimized.
  • the apparatus of the present invention is applicable to processing a wide variety of filaments and yarns.
  • the filaments can be made from a thermoplastic fiber-forming resin and can be extended by drawing and then show increased molecular orientation along the filament axis.
  • fiber-forming synthetic polymers are polyethylene; polypropylene; polyurethanes; copolymers of vinyl acetate and vinyl chloride; the copolymers of vinylidene and a minor proportion of mono-olefinic compounds copolymerized therewith; homopolymers of acrylonitrile, copolymers of acrylonitrile and a minor proportion of at least one mono-olefinic compound copolymerized therewith and polymer blends containing combined acrylonitrile in a major proportion; copolymers of vinyl chloride and acrylonitrile; linear polyesters of aromatic dicarboxylic acids and dihydric compounds such as polymeric ethylene terephthalate and the polyester derived from terephthalic acid and bis-1.4(hydroxymethyl) cycl
  • Multi-lobal yarn may be regarded as having a body section and a plurality of fins or legs integrally joined to the body section and radially extending therefrom, such as yarn of X or Y- shaped cross section. It has been found that the legs of the Inulti-lobal filaments when passed over the draw roll spread out, thereby giving rise to a larger flat surface engaging the roll than filaments of the same denier but with a circular cross section. The spreading of the legs causes the filaments to have a greater tendency to adhere to the known draw rolls.
  • the draw roll had a diameter of 3 inches and a length of 4 inches. There were 8 polished strips and the same number of roughened strips. The width of each polished strip was 1 inch and the width of each roughened strip was /2 inch.
  • Nylon 66 yarn having a spun denier of 4370 and a total number of filaments of 14-0 was supplied to the feed rolls 12 and 13 at 35 yards per minute. From the feed rolls the yarn was led onto and around a stationary snubbing pin one time. The yarn was Wrapped around draw roll 15 and the separator roll 5 times. The yarn left the draw roll at 196 yards per minute. The stretched yarn displayed practically no filament breakage.
  • Yarn can be stretched with a minimum filament breaking.
  • the number of wraps taken around the draw roll to hold the yarn under the desired drawing tension is reduced compared to the number required when a roll composed entirely of a roughened surface is used.
  • Apparatus for drawing textile filaments comprising means to supply textile filaments from a source at a predetermined speed, a cylindrical draw roll adapted to be driven so that the filaments normally being supplied to it are under considerable tension, said draw roll having a plurality of high-friction polished strips and a plurality of low-friction matte strips formed on the peripheral surface thereof, the filaments normally engaging said highand said low-friction strips, said strips being substantially parallel and extending axially of said draw roll, the polished strips and the matte strips following one another alternately about the periphery of said draw roll, the total surface area of the polished strips constituting about 50-80 percent of the total filament engaging peripheral area of said draw roll, and a separator roll mounted adjacent to said draw roll in spaced relationship therewith and positioned so that the axis of said separator roll is disposed at a slight angle with respect to the axis of said draw roll in order that the filaments normally progressing engagingly around said draw roll and said separator roll will describe generally a helix with convolutions
  • Apparatus for drawing textile filaments comprising means to supply synthetic textile filaments capable of being molecularly oriented from a source thereof at a pre determined speed, a metal cylindrical draw roll adapted to be driven at a peripheral speed greater than the speed at which the filaments are supplied so that the filaments are stretched a predetermined extent, said draw roll having a plurality of high-friction polished strips and a plurality of low-friction matte strips formed on the peripheral surface thereof, the filaments normally engaging said highand said low-friction strips, said strips being substantially parallel and extending axially of said draw roll, the polished strips and the matte strips following one another alternately about the periphery of said draw roll, the total surface area of the polished strips constituting about 60-75 percent of the total filament engaging peripheral area of said draw roll, and a separator roll mounted adjacent to said draw roll in spaced relationship therewith and positioned so that the axis of said separator roll is disposed at a slight angle with respect to the axis of said draw roll in order that the filaments
  • Apparatus for drawing textile filaments comprising a driven feed roll assemblage for supplying at a predetermined speed synthetic textile filaments delivered thereto from a source thereof, a metal cylindrical draw roll rotatably mounted in spaced relation near said driven feed roll assemblage and adapted to be driven at a peripheral speed greater than the speed at which the filaments are supplied thereto from said feed roll assemblage so that the filaments are stretched to a predetermined extent, said draw roll having a plurality of high-friction polished strips and a plurality of low-friction matte strips formed on the peripheral surface thereof, the filaments normally engaging said highand said low-friction strips, said strips being substantially parallel and extending axially of said draw roll, the polished strips and the matte strips following one another alternately about the periphery of said draw roll, the total surface area of the polished strips constituting about -80 percent of the total filament engaging peripheral area of said draw roll, a separator roll freely rotatably mounted adjacent to said draw roll in spaced relationship therewith and positioned so that the axi

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Woven Fabrics (AREA)
  • Nonwoven Fabrics (AREA)
US3123891D 1961-04-10 Apparatus for drawing textile filaments Expired - Lifetime US3123891A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10205361A 1961-04-10 1961-04-10

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Publication Number Publication Date
US3123891A true US3123891A (en) 1964-03-10

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US3123891D Expired - Lifetime US3123891A (en) 1961-04-10 Apparatus for drawing textile filaments

Country Status (7)

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US (1) US3123891A (de)
BE (1) BE615992A (de)
CH (1) CH384771A (de)
DE (1) DE1260678B (de)
DK (1) DK102978C (de)
GB (1) GB931479A (de)
NL (1) NL276784A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2118316A1 (de) * 1970-04-15 1971-11-04 Societe ue la Viscose Suisse, Emmenbrücke (Schweiz) Verfahren zum Herstellen von PoIyäthylenterephthalat-Fäden
US3917185A (en) * 1972-11-24 1975-11-04 Sonoco Products Co Business machine core
US4544433A (en) * 1982-01-14 1985-10-01 Esselte Pendaflex Corporation Device for intermittently transporting a label bearing tape in a manually operated labeler

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2186654B1 (de) * 1972-05-29 1976-01-16 Electricite De France Fr

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2320891A (en) * 1942-02-19 1943-06-01 Apponaug Company Dye beck
US2993260A (en) * 1958-02-20 1961-07-25 American Enka Corp Differentially heated draw pin
US3020621A (en) * 1959-12-03 1962-02-13 Du Pont Draw roll
US3025660A (en) * 1957-01-24 1962-03-20 American Enka Corp Drawtwisting process
US3029993A (en) * 1954-12-20 1962-04-17 Owens Corning Fiberglass Corp Apparatus for feeding a continuous untwisted multifilament strand

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE129108C (de) *
DE499215C (de) * 1929-01-27 1930-06-04 Saechsische Maschinenfabrik Vo Spinntopfkunstseidenspinnmaschine
US2289232A (en) * 1939-07-14 1942-07-07 Du Pont Method and apparatus for producing filamentary structures
DE742276C (de) * 1940-05-21 1943-11-26 Ig Farbenindustrie Ag Streckwerk zum nachtraeglichen Verstrecken organischer Gebilde aus geschmolzenen Massen
NL153064C (de) * 1950-03-16
US2721650A (en) * 1952-01-24 1955-10-25 American Cyanamid Co Pinch-roll assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2320891A (en) * 1942-02-19 1943-06-01 Apponaug Company Dye beck
US3029993A (en) * 1954-12-20 1962-04-17 Owens Corning Fiberglass Corp Apparatus for feeding a continuous untwisted multifilament strand
US3025660A (en) * 1957-01-24 1962-03-20 American Enka Corp Drawtwisting process
US2993260A (en) * 1958-02-20 1961-07-25 American Enka Corp Differentially heated draw pin
US3020621A (en) * 1959-12-03 1962-02-13 Du Pont Draw roll

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2118316A1 (de) * 1970-04-15 1971-11-04 Societe ue la Viscose Suisse, Emmenbrücke (Schweiz) Verfahren zum Herstellen von PoIyäthylenterephthalat-Fäden
US3715421A (en) * 1970-04-15 1973-02-06 Viscose Suisse Soc D Process for the preparation of polyethylene terephthalate filaments
US3917185A (en) * 1972-11-24 1975-11-04 Sonoco Products Co Business machine core
US4544433A (en) * 1982-01-14 1985-10-01 Esselte Pendaflex Corporation Device for intermittently transporting a label bearing tape in a manually operated labeler

Also Published As

Publication number Publication date
DK102978C (da) 1965-11-01
GB931479A (en) 1963-07-17
NL276784A (de)
DE1260678B (de) 1968-02-08
CH384771A (fr) 1965-02-26
BE615992A (fr) 1962-10-04

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