US3041706A - Apparatus for processing cold-drawable textile filaments - Google Patents

Apparatus for processing cold-drawable textile filaments Download PDF

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Publication number
US3041706A
US3041706A US70020A US7002060A US3041706A US 3041706 A US3041706 A US 3041706A US 70020 A US70020 A US 70020A US 7002060 A US7002060 A US 7002060A US 3041706 A US3041706 A US 3041706A
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US
United States
Prior art keywords
yarn
crimping
gear
gears
filaments
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
US70020A
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English (en)
Inventor
James E Bromley
William H Hills
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.)
Monsanto Chemicals Ltd
Monsanto Chemical Co
Original Assignee
Monsanto Chemicals Ltd
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 Monsanto Chemicals Ltd filed Critical Monsanto Chemicals Ltd
Priority to US70020A priority Critical patent/US3041706A/en
Priority to GB39336/61A priority patent/GB932984A/en
Priority to ES0271863A priority patent/ES271863A1/es
Priority to DK456961AA priority patent/DK112189B/da
Priority to DE19611435391 priority patent/DE1435391A1/de
Priority to BE610459A priority patent/BE610459A/fr
Priority to CH1340961A priority patent/CH380288A/fr
Application granted granted Critical
Publication of US3041706A publication Critical patent/US3041706A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • D02G1/14—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using grooved rollers or gear-wheel-type members
    • 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

  • This invention relates to apparatus for processing colddrawable textile filaments formed from a thermoplastic polymer. More particularly, this invention relates to apparatus for continuously stretching and continuously deforming substantially parallel synthetic continuous textile filaments of the nylon type, whereby such filaments are rendered potentially crimpable.
  • Continuous synthetic cold-drawable filaments can be formed from nylon polymers and the like by the wet, dry, or melt spinning processes, the last mentioned process being employed in the commercial production of most, if not all, of the nylon filaments made today.
  • the freshly formed nylon filaments generally are not highly oriented and have relatively low tensile strengths as compared to highly oriented nylon filaments in which the molecules are aligned or oriented in the direction of the filament axis.
  • synthetic filaments are relatively straight and have a smooth, slick surface, thereby not being particularly adapted for spinning into spun yarn by the conventional spinning systems.
  • synthetic staple fibers are subjected in connection with spinning them into spun yarn
  • it is essential to crimp them so that they will have a satisfactory contour or pattern to permit spinning thereof into spun yarn by means of conventional textile processing equipment.
  • Numerous devices and processes have been proposed to impart this desired crimp or crinkle to synthetic continuous filaments.
  • One known form of a crimping device uses toothed gearing or serrated wheels which are heated and adapted to receive the straight continuous filaments and to shape them by compressive forces into a crimped configuration.
  • continuous filament yarns have the advantage of greater evenness and superior strength, they have several undesirable properties, including low heat insulating values, lack of bulkiness desired for some end uses, and low covering power. Many attempts have been made in the past to impart some of these desirable properties of spun yarn to continuous filament yarn. In addition to the fact that the expense of manufacturing the yarn is increased considerably, there are unfortunately certain well recognized disadvantages associated with the prior devices and methods for imparting bulk to continuous filament yarn.
  • an object of this invention is to provide a yarn crimping apparatus having crimping gears which are cooled to prevent a substantial temperature rise.
  • Another object of this invention is to provide a novel and improved yarn treating apparatus.
  • Another object of this invention is to provide an apparatus for commercially producing a thermoplastic continuous multifilament yarn having a fluffy, stretchable character and possessing many properties associated with spun yarn while retaining many properties associated with filament yarn such as strength and freedom from pilling.
  • Another object of this invention is to provide an an paratus for drawing and deforming nylon filaments in a single operation so as to render same potentially highly cr-impable.
  • Still another object of this invention is to provide an apparatus for simultaneously deforming and cooling nylon filaments immediately after said filaments are oriented by a drawing operation.
  • a further object of this invention is to provide an apparatus utilizing crimping gears which are cooled to prevent a substantial temperature rise.
  • a still further object of this invention is to provide an improved stretching and deforming apparatus for processing nylon or the like.
  • cold-drawable synthetic filaments are fed by a power driven feed roller through a heat-stretch zone wherein the filament-s are heated and stretched and from which the filaments are fed between positively driven intermeshing crimping gears, the teeth of which are cooled to limit temperature rise.
  • the cooling is achieved by the use of a nozzle which directs cooling air onto one of the crimping gears.
  • FIGURE 1 is a schematic view showing the general arrangement of the elements making up one embodiment of the invention.
  • FIGURE 2 is an enlarged fragmentary view showing the positioning of an air nozzle relative to one of the crimping gears.
  • an improved stretching and deforming machine for processing nylon or like synthetic continuous filament yarn, the machine being constructed for highly efficient and economical operation.
  • a feed roll assembly and a set of drawing and deforming toothed wheel members together with means for heating the yarn such as a heated draw or stretch pin, a heated plate, a heated tube, and the like interposed between the said roll assembly and said members.
  • the yarn is fed to the said feed roll assembly after being passed around or through a suitable tensioning device.
  • At least one of the rolls is positively driven.
  • the objectives of the roll assembly are the provision of a supply of yarn at a predetermined rate and the provision that the yarn will not slip therethrough or therearound due to the stretch tension subsequently applied.
  • a pair of crimping gears driven in unison and intermeshing in close relationship without coming in contact with each other.
  • At least one of the crimping gears is positively driven at a predetermined increased speed relative to the delivery speed of the roll assembly such that a stretch is imparted to the yarn between the said roll assembly and said gears.
  • the yarn is directed in operation between the gears and preferably around part of the periphery of one of the gears and thence around an idle roll for a desired number of times or wraps with the yarn taking a path that progressively moves longitudinally forward with respect to the point where the yarn initially is passed between the gears.
  • the crimping members not only serve to deform the filaments of the yarn but'also function to cool rapidly or to quench and thereby to harden them as they pass therebetween.
  • the members are made preferably of heat conductive material.
  • a nozzle is provided for directing cool air onto one of the crimping gears. This holds down the temperature of the crimping gears to give a more uniform crimp characteristic. After being stretched and deformed in such manner, the yarn is taken up in a well known manner.
  • thermoplastic colddraw-able yarn It such as nylon or the like, composed of a bundleof smooth, substantially parallel filaments that have not been fully oriented, is supplied from a yarn source 11 on a bobbin 12. Since the yarn is not completely oriented, it is necessary to extend the yarn to be processed in order to obtain the optimum degree of molecular orientation therein.
  • the yarn It is passed over and around one end of the bobbin 12 and is threaded conventionally around a snubbing bar 13 which functions as a simple tensioning device to assist in maintaining an orderly and uniform supply of yarn.
  • the yarn is passed through a yarn guide 14 and then to a pair of feed rolls 15 that withdraw the yarn from the bobbin lz and supply it at a predetermined delivery speed.
  • the rolls 15 have parallel axes and engage each other in operation to nip sufficiently the yarn passing therethrough so that slippage or free-flight of the yarn between the rolls is prevented.
  • the yarn It? is led downwardly and around a heated stretch or draw pin 16 of a well known type where the majority of the attenuation of the yarn occurs.
  • the pin mounted so that it is axially askew with respect to the axes of the feed rolls 15, has a smooth yarn contact surface.
  • the yarn It is directed downwardly between rotatably mounted and axially parallel crimping gears 17 and 18 positioned immediately beneath the pinlfi and having a plurality of uniformly circumferentially spaced and longn'tudinally extending teeth 20 that mesh in closely spaced adjustment.
  • the gears 17 and 18 are keyed to shafts 21 and 22, re-
  • the yarn 10 is subjected to laterally applied stresses increasing and decreasing in intensity as the yarn approaches and leaves the horizontal plane in which the axes of the crimping gears lie and where said teeth engage the notches defined by said teeth to the greatest extent.
  • the yarn After being directed around part of the periphery of the gear 17.
  • the yarn After being directed tangentially therefrom and then around part of the periphery of an idle roll 25 spaced from the gear 17 and mounted on a supporting frame 26, the frame 26 also supporting the other parts of the apparatus.
  • the yarn is wound around the gear 17 and the idle roll 25 to, form a plurality of wraps as shown in the drawing.
  • the axis of the roll 25 is positioned at a slightly inclined angle with respect to the axes of the gears 17 and 18 so as to insure proper longitudinal distribution, on and advancement along the peripheries of the gear 17 and the roll 25, thus preventing superposition of the wraps thereon.
  • the yarn wrapped around the gear 17 and the horizontally spaced idle roll 25 assumes generally the shape of a flattened helix, the convolutions of which being spaced apart, so that the yarn advances along the gear 17 from the inboard to the outboard thereof during rotation of the gears 17 and 18.
  • an air nozzle 34 is provided.
  • the nozzle 34 is connected to a source 35 of cool air or other gas.
  • the nozzle 34 extends between the yarn wraps on the gear 17 and the idle roll 25 and is curved at the end to direct cooling air onto the gear 17. Stated in an other way, the nozzle 34 extends into the central part of the flattened helix defined by the yarn wraps and then bends toward the gear 17.
  • the nozzle 34 is positioned to direct a stream of cooling air onto the crimping gear 17 but not onto the moving yarn 10. This permits the yarn 10 to retain its heat while at the same time holding down the temperature of the gear 17. Since the yarn 10 is not wrapped around the crimping gear 18, it is not necessary to cool this gear.
  • the temperature of the gear 17 will have an affect on the crimping operation. If the temperature of the gear 17 is permitted to vary widely, the result will be wide variations in the crimped characteristics of the yarn. In fact, without the air nozzle 34, the temperature of the crimping gear 17 would slowly rise as the heated yarn is moved over it. This would naturally cause changes in the final characteristics of the yarn. By using the stream of air to cool the gear 17, a substantially uniform result is achieved, since the crimping gear 17 is cooled to pre ventundesirable temperature rises.
  • the yarn is fed vertically downwardly through a yarn pigtail guide 29, which is mounted below the crimping gears.
  • the yarn is then taken up in a conventional manner by a suitable form of package building apparatus such as a ring twisting assembly which comprises a bobbin 28 adapted to be rotated by driven belt 30 in a conventional manner to form a yarn package 31.
  • the assembly further includes a conventional vertically-reciprocated ring 32 carrying a traveller 33 adapted to revolve freely around the bobbin 28 as the yarn is twisted a desired amount and wound ontothe bobbin.
  • An apparatus for crimping a yarn comprising a frame, a pair of yarn crimping gears mounted on the frame, means for driving the yarn crimping gears, an idle roll mounted on the frame at a location spaced from one of the yarn crimping gears for cooperating with said one gear to form a plurality of wraps in a heated yarn in such a manner that the yarn engages only a portion of said one gear, and a nozzle mounted inside said wraps for directing a cooling medium onto that portion of said one gear not engaged by the yarn'to prevent a temperature rise in said one gear.
  • An apparatus for crimping a yarn comprising a frame, a pair of meshed crimping gears mounted on the frame, means for driving the crimping gears, an idle roll mounted on the frame at a position spaced from one of the crimping gears for cooperating with said one crimping gear to form a plurality of wraps in a heated yarn in such a. manner that the yarn is in engagement with only a portion of said one gear, and an air nozzle positioned between the idle roll and said one crimping gear in such a manner as to direct a stream of cooling air onto that portion of said one crimping gear which is not in engagement with the yarn.
  • An apparatus for crimping a yarn comprising a frame, a yarn crimping element rotatably mounted on the frame, guide means on the frame for directing the yarn across the crimping element in such a manner that said yam is in contact With the crimping element along an are on the periphery of said crimping element, and a nozzle positioned adjacent to the side of the crimping gear opposite the said are for directing a cooling fluid onto said opposite side.
  • An apparatus for crimping a yarn comprising a frame, a crimping gear rotatably mounted on the frame, an idle roll mounted on the frame and positioned from the crimping gear for cooperating with said gear to form a plurality of yarn wraps in such a manner that the yarn is in engagement with only a pontion of the crimping gear, and a nozzle positioned between the crimping gear and the idle roll for directing a stream of cooling fluid onto the crimping gear at a point spaced from said portion of said crimping gear.
  • An apparatus for crimping a yarn comprising a frame, a crimping gear rotatably mounted on the frame, a

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Treatment Of Fiber Materials (AREA)
US70020A 1960-11-17 1960-11-17 Apparatus for processing cold-drawable textile filaments Expired - Lifetime US3041706A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US70020A US3041706A (en) 1960-11-17 1960-11-17 Apparatus for processing cold-drawable textile filaments
GB39336/61A GB932984A (en) 1960-11-17 1961-11-02 Apparatus for texturizing cold-drawable textile filaments
ES0271863A ES271863A1 (es) 1960-11-17 1961-11-09 Aparato para rizar un hilo calentado
DK456961AA DK112189B (da) 1960-11-17 1961-11-16 Apparat til krusning af et opvarmet garn.
DE19611435391 DE1435391A1 (de) 1960-11-17 1961-11-16 Vorrichtung zum Kraeuseln von erhitztem Garn
BE610459A BE610459A (fr) 1960-11-17 1961-11-17 Perfectionnements aux appareils à friser les fils et filaments synthétiques.
CH1340961A CH380288A (fr) 1960-11-17 1961-11-17 Appareil pour friser des fils et filaments synthétiques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US70020A US3041706A (en) 1960-11-17 1960-11-17 Apparatus for processing cold-drawable textile filaments

Publications (1)

Publication Number Publication Date
US3041706A true US3041706A (en) 1962-07-03

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ID=22092616

Family Applications (1)

Application Number Title Priority Date Filing Date
US70020A Expired - Lifetime US3041706A (en) 1960-11-17 1960-11-17 Apparatus for processing cold-drawable textile filaments

Country Status (7)

Country Link
US (1) US3041706A (da)
BE (1) BE610459A (da)
CH (1) CH380288A (da)
DE (1) DE1435391A1 (da)
DK (1) DK112189B (da)
ES (1) ES271863A1 (da)
GB (1) GB932984A (da)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3113366A (en) * 1960-12-12 1963-12-10 Monsanto Chemicals Apparatus for texturizing filaments
US3192597A (en) * 1963-08-21 1965-07-06 Monsanto Co Yarn texturing apparatus and method
US3204319A (en) * 1963-03-25 1965-09-07 Monsanto Co Apparatus for texturizing yarn
US3217376A (en) * 1962-11-23 1965-11-16 Monsanto Co Yarn crimping apparatus
US3217377A (en) * 1963-03-25 1965-11-16 Monsanto Co Method for texturizing yarn
US3234626A (en) * 1963-10-28 1966-02-15 Monsanto Co Apparatus for hot and cold crimping of textile filaments
US3293843A (en) * 1963-02-02 1966-12-27 British Nylon Spinners Ltd Drawing and crimping synthetic polymer filaments
US3377826A (en) * 1966-03-02 1968-04-16 Pilot Res Corp Ladies' stretch heelless stockings
US3447296A (en) * 1966-05-31 1969-06-03 Monsanto Co Method and apparatus for producting a novel high bulk continuous filament low stretch yarn
US4133088A (en) * 1976-06-10 1979-01-09 Kokichi Hikobe Room temperature crimping of fibrillated film material
US4223063A (en) * 1979-03-02 1980-09-16 Sabee Reinhardt N Pattern drawing of webs, and product produced thereby

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2313630A (en) * 1939-09-12 1943-03-09 Owens Corning Fiberglass Corp Method and apparatus for producing glass fibers
US2394165A (en) * 1943-04-23 1946-02-05 Getaz James Louis Processing of synthetic fibers
US2855749A (en) * 1955-01-07 1958-10-14 American Enka Corp Yarn tensioning

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2313630A (en) * 1939-09-12 1943-03-09 Owens Corning Fiberglass Corp Method and apparatus for producing glass fibers
US2394165A (en) * 1943-04-23 1946-02-05 Getaz James Louis Processing of synthetic fibers
US2855749A (en) * 1955-01-07 1958-10-14 American Enka Corp Yarn tensioning

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3113366A (en) * 1960-12-12 1963-12-10 Monsanto Chemicals Apparatus for texturizing filaments
US3217376A (en) * 1962-11-23 1965-11-16 Monsanto Co Yarn crimping apparatus
US3293843A (en) * 1963-02-02 1966-12-27 British Nylon Spinners Ltd Drawing and crimping synthetic polymer filaments
US3204319A (en) * 1963-03-25 1965-09-07 Monsanto Co Apparatus for texturizing yarn
US3217377A (en) * 1963-03-25 1965-11-16 Monsanto Co Method for texturizing yarn
US3192597A (en) * 1963-08-21 1965-07-06 Monsanto Co Yarn texturing apparatus and method
US3234626A (en) * 1963-10-28 1966-02-15 Monsanto Co Apparatus for hot and cold crimping of textile filaments
US3377826A (en) * 1966-03-02 1968-04-16 Pilot Res Corp Ladies' stretch heelless stockings
US3447296A (en) * 1966-05-31 1969-06-03 Monsanto Co Method and apparatus for producting a novel high bulk continuous filament low stretch yarn
US4133088A (en) * 1976-06-10 1979-01-09 Kokichi Hikobe Room temperature crimping of fibrillated film material
US4223063A (en) * 1979-03-02 1980-09-16 Sabee Reinhardt N Pattern drawing of webs, and product produced thereby

Also Published As

Publication number Publication date
GB932984A (en) 1963-07-31
DK112189B (da) 1968-11-18
BE610459A (fr) 1962-05-17
ES271863A1 (es) 1962-05-16
DE1435391A1 (de) 1969-05-08
CH380288A (fr) 1964-07-31

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