US3902676A - Vibration generator for yarns - Google Patents

Vibration generator for yarns Download PDF

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Publication number
US3902676A
US3902676A US395600A US39560073A US3902676A US 3902676 A US3902676 A US 3902676A US 395600 A US395600 A US 395600A US 39560073 A US39560073 A US 39560073A US 3902676 A US3902676 A US 3902676A
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US
United States
Prior art keywords
slot
yarn
generator
drum
waves
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
US395600A
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English (en)
Inventor
Rolland Sartori
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.)
Ateliers Roannais de Constructions Textiles SA
Original Assignee
Ateliers Roannais de Constructions Textiles SA
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
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Application filed by Ateliers Roannais de Constructions Textiles SA filed Critical Ateliers Roannais de Constructions Textiles SA
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Publication of US3902676A publication Critical patent/US3902676A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B65H54/28—Traversing devices; Package-shaping arrangements
    • B65H54/2836—Traversing devices; Package-shaping arrangements with a rotating guide for traversing the yarn
    • B65H54/2842—Traversing devices; Package-shaping arrangements with a rotating guide for traversing the yarn grooved, slotted, or split drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B65H54/28—Traversing devices; Package-shaping arrangements
    • B65H54/2893—Superposed traversing, i.e. traversing or other movement superposed on a traversing movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H57/00—Guides for filamentary materials; Supports therefor
    • B65H57/14—Pulleys, rollers, or rotary bars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments
    • B65H2701/312—Fibreglass strands
    • B65H2701/3122—Fibreglass strands extruded from spinnerets
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S242/00—Winding, tensioning, or guiding
    • Y10S242/907—Vibration creation or dampening

Definitions

  • ABSTRACT A vibration generator for yarns in which the yarn is received in a slot in the periphery of arotating hollow body, the yarn bearing against the body only at the two points at which it intersects the circular outer surface as a secant of that circular surface.
  • the vibration-generating body is pneumatically driven and may include guide grooves to feed the yarn into the vibrating slots.
  • the present invention relates to guides for travelling textile yarns and is concerned more particularly with vibration generators for yarns such as in bobbinwinding systems.
  • French Pat. No. 1,579,444 employed an oscillating wire actuated by a small, eccentric wheel.
  • this apparatus has been found to be too delicate for high-speed winding operations such as those operating above a thousand metres per minute.
  • French Pat. No. 1,012,078 discloses a system for vibrating yarns in a direction parallel to the axis of the bobbin on which they are to be wound and using, for example, a diapason or a vibrating blade. This system is an improvement, but it still is not satisfactory for the extreme winding speeds currently being employed.
  • the yarn sometimes winds on the cam itself and can continue to do so until something is broken.
  • the mechanical structure is strong enough to take this abnormal load, the hydraulic system is then subjected to extreme loads and pressures, sometimes to the point of rupture of the hydraulic system.
  • the preferred form of yarn-vibration generator of the present invention comprises a rotating hollow body or drum having a wavy slot in its cylindrical periphery, the side walls of the slot being smoothed to engage a yarn at two points of intersection of the yarn with the cylindrical surface of the drum.
  • the yarn forms a secant of the circular periphery of the drum and is substantially free of engagement with the drum except for the side walls of the slot which it engages at its points of intersection with the circular periphery.
  • the drum is driven by an inertia-type, pneumatic drive which is capable of stalling under excessive load.
  • a still further object of the invention is the provision of a yarn-vibration generator which engages the yarn at two points spaced along the yarn and permits the yarn to remain free and straight between those points.
  • An additional object of the invention is the provision of a yarn-vibration generator which is capable of stalling under extreme load to prevent damage to the yarn and to the attendant equipment.
  • FIG. 1 is a perspective view of a yarn-winding installation incorporating the preferred vibration generator of the present invention
  • FIG. 2 is an enlarged side view of the yarn generator of FIG. 1;
  • FIG. 3 is a sectional view of a portion of FIG. 2;
  • FIG. 4 is a sectional view of the installation of FIG.
  • FIG. is a view semilar to FIG. 3 and showing a modified form of vibration generator
  • FIG. 6 is a perspective view of a modified form of drum
  • FIG. 7 is a side view of the drum of FIG. 6;
  • FIG. 8 is a perspective view of a further modified form of drum, and
  • FIG. 9 is a side view of the drum of FIG. 8.
  • the preferred form of yarn-vibration generator of the present invention is incorporated in a yarn-winding station in which a textile yarn l is wound on a support or bobbin 2 under guidance of a reciprocating yarn guide 3 which is controlled by a cam 4.
  • the yarn guide 3 is mounted for reciprocation on guide rods 5 and 6 and includes yarndirecting forks 7 and 8 and is otherwise conventional in construction.
  • the fork 7 is formed on part of a housing 9 which carries a hollow rotor or drum 10 therein.
  • the drum 10 is mounted on a core 11.
  • the drum preferably is driven by a compressed air drive, not shown in detail in these FIGS. 1-4, for reasons of clarity, but discussed more fully hereinafter with respect to FIG. 5.
  • the hollow drum 10 has a wave-form slot 12 therein which, since the interior is hollow, receives the yarn in engagement only with the sidewalls l3 and 14 of the outer portion of the drum.
  • the housing 9 includes a pair of smooth, abrasionresistant guide bars 15 and 16.
  • the guide bar 15 is looped back to form an outside bar 1541.
  • the guide bars preferably have polished, smooth surfaces and prevent the yarn from hitting sharp areas of the housing and, in the case of the bar 15a, prevent complete escape of the yarn from the guide and vibration generating system.
  • an amount of deflection of the yarn is imposed by protrusion of the fork 7 beyond a straight line from the guide 8 to the bar 15.
  • This slight deflection A serves to dampen the generated vibrations to prevent their travel back to the upstream run of the yarn or to the unwinding point thereof.
  • the yarn 1 forms a secant with the exterior surface of the drum 10, the two points of intersection being identified by the numerals l7 and 18.
  • the angle B between the points 17 and 18 is about 70.
  • the distance between the points 17 and 18 may be as required to form the desired angle B, and may or may not bear a relation to the wave pattern of the slot.
  • the wave form of the slot 12 may take various forms, either a single wave per revolution or multiple waves per revolution. However, in the case of a slot having multiple waves or alternating high points, it is even more advantageous to have the waves of non-uniform length, thereby creating interference and greater action and jumbling of the vibrational waves in the yarn.
  • the frequency of vibration of the yarn preferably is not a whole number of sub-multiple of the circumference of the bobbin being wound.
  • the drum 10 is driven by compressed air entering through the hollow axle 20 which carries it nozzle chamber 21 having a nozzle 22 directed toward a turbine-blade area 23 on the drum. Air entering the drum through the blade area 23 is free to escape through vents 24 on the opposite wall.
  • the drum 10 is mounted on the axle 20 by means of suitable bearings 25 and 26 which engage the core 11 of the drum.
  • Air is supplied to the hollow axle 20 by means of a flexible tubing 27 which is free to move with the guide assembly, and which is itself guided such as by opposed U-channels 28 and 29, shown in broken lines in FIG. 1.
  • the secant yarn forms a chord which subtends an are or peripheral length of 21r/n between the two points at which the yarn intersects the periphery of the drum.
  • the waves have the same amplitude and the same frequency.
  • n is advantageously, at least three, 'and preferably is four, with the secant arcs then being 120 and angle degrees respectively. This arrangement makes it easier for the yarn to enter and be held in the generator, because the yarn is guided therein only at two points which are aligned in a plane perpendicular to the axis of the generator, and thus always parallel to it.
  • the median plane of the slot 12 is aligned with and parallel to the motion of the yarn. If desired, the median plane of the slot may be slightly skewed, with respect to the direction of yarn travel, to provide a varied agitation of the yarn and agitation of the free portion thereof between the points 17 and 18.
  • a multi-wave slot includes wave forms of successively decreasing lengths, the sum of which preferably at least equal to the length of yarn which equals the circumference of the largest-diameter winding to be produced.
  • the speed of rotation of the drum may be varied. Preferably, this is accomplished by varying the delivery of compressed air to the turbine 23, either uniformly or randomly.
  • the winding station includes a rotating cylinder or pilot roller 30 which drives the bobbin 2 by peripheral contact.
  • pilot rollers are employed with the generators of the present invention, it is desirable to have the generator drum as close as possible to avoid attenuation or loss of the vibrations in the yarn.
  • the arcuate contact of the yarn with the pilot roller should be limited. Quite satisfactory results are obtained at extreme speeds (3,000 meters per minute, or more) when the angle C defining this arcuate contact is within the limits of zero to 30.
  • the modified form of wave generating drum 10' includes a chamfered portion 31 having a spiral feed groove 32 which begins shallow adjacent the shoulder of the chamfer 31 and deepens around to intersect the slot 12'.
  • the intersection of the groove 32 and the slot 12 is formed at or adjacent an extremity or lateral crest of the slot, while the depth of the groove at that point is sufficient to trap a yarn therein to enter the slot 12'.
  • another advantageous form of drum 10 includes a recapturing groove 33 which extends along the outer surface of the drum and intersects the slot 12" at point 35.
  • the recapturing groove 33 extends across the median plane of the slot 12. The recapturing groove 33 is operable to engage an escaped yarn and reintroduce the yarn into the slot 12".
  • a yarn-vibration generator drum was constructed incorporating the several features of the invention, including the feed groove 32 and the recapturing groove 33.
  • the drum was cut from aluminum stock to form a hollow 16 mm drum having a 7 mm chamfer.
  • the wave slot was cut through the outer surface, with a width of about 1 mm, and included four waves about the circumference of the drum.
  • a spiral feed groove was cut into the chamber and the outer surface of the drum, the average depth of the deepening groove being approximately l mm. At the point of intersection with the slot 12, however, the groove 32 reaches full depth of the wall carrying the groove, so that the yarn engaged by the groove is then engaged by the walls of the slot 12.
  • the recapturing groove 33 was made approximately 1 mm wide and 1 mm deep, in accordance with FIGS. 8 and 9.
  • vibration generating drums of the present invention may be formed of any suitable material including metals and plastics, whether they be machined or moulded.
  • the dimensions are not critical in themselves, but it is important that sharp edges or comers are to be avoided.
  • the drums may be coated with a ceramic.
  • the present invention provides a uniquely advantageous yarnvibration generator which, where employed in a bobbin winding station, not only improves the stability of the general windings, but even produces a stability of the windings at the end-sections at which the yam-guide mechanism reverses direction, which has been a distinct problem.
  • Apparatus for winding textile yarn including a yarn guide, means for reciprocating said yarn guide, said yarn guide including a vibration generator mounted on said yarn guide for reciprocation therewith, said vibration generator including an assembly comprising a. a hollow drum having a circumferential slot therein, said slot having at least one wave therein,
  • the hollow drum includes a hub and two outer portions, the outer portions being spaced from each other to form said slot.
  • the hollow drum has a chamfered portion, a feed groove on said chamfered portion, said feed groove deepening from said chamfer toward said slot and intersecting said slot at the apex of a wave in said slot.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Winding Filamentary Materials (AREA)
US395600A 1973-05-10 1973-09-10 Vibration generator for yarns Expired - Lifetime US3902676A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7317028A FR2229250A6 (enrdf_load_stackoverflow) 1973-05-10 1973-05-10

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4453678A (en) * 1981-05-13 1984-06-12 Institute Po Obleklo I Textil Apparatus for the formation of yarn packages
US4564152A (en) * 1984-06-18 1986-01-14 Herriage A A Apparatus for storing and transporting wire on reels and for dispensing wire from the reels
US11925915B2 (en) * 2014-11-05 2024-03-12 Maag Automatik Gmbh Squeezing-roll granulator, granulating system comprising same, and use of the squeezing-roll granulator

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7808735A (nl) * 1977-09-29 1979-04-02 Ppg Industries Inc Werkwijze en apparaat voor het traverseren van streng- materiaal.

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1727884A (en) * 1927-08-27 1929-09-10 Napon Rayon Corp Winding machine
US2151327A (en) * 1936-09-25 1939-03-21 Celanese Corp Textile apparatus
US2249147A (en) * 1937-11-03 1941-07-15 Kuppers Josef Quick traverse winding frame
US2550086A (en) * 1941-03-18 1951-04-24 Rhodiaceta Cross winding yarns on their supporting reels
US2739761A (en) * 1950-08-07 1956-03-27 Rieter Joh Jacob & Cie Ag Split drum for traverse winding frames
US3115313A (en) * 1961-06-21 1963-12-24 Owens Corning Fiberglass Corp Apparatus for traversing filamentary materials
US3235191A (en) * 1963-08-29 1966-02-15 Monsanto Co Yarn winding process and yarn package
US3241779A (en) * 1963-04-15 1966-03-22 Monsanto Co Yarn winding control apparatus
US3523652A (en) * 1967-03-21 1970-08-11 American Enka Corp Drum traverse winding machine
US3640478A (en) * 1968-04-11 1972-02-08 K D G Instr Ltd Winding apparatus

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1727884A (en) * 1927-08-27 1929-09-10 Napon Rayon Corp Winding machine
US2151327A (en) * 1936-09-25 1939-03-21 Celanese Corp Textile apparatus
US2249147A (en) * 1937-11-03 1941-07-15 Kuppers Josef Quick traverse winding frame
US2550086A (en) * 1941-03-18 1951-04-24 Rhodiaceta Cross winding yarns on their supporting reels
US2739761A (en) * 1950-08-07 1956-03-27 Rieter Joh Jacob & Cie Ag Split drum for traverse winding frames
US3115313A (en) * 1961-06-21 1963-12-24 Owens Corning Fiberglass Corp Apparatus for traversing filamentary materials
US3241779A (en) * 1963-04-15 1966-03-22 Monsanto Co Yarn winding control apparatus
US3235191A (en) * 1963-08-29 1966-02-15 Monsanto Co Yarn winding process and yarn package
US3523652A (en) * 1967-03-21 1970-08-11 American Enka Corp Drum traverse winding machine
US3640478A (en) * 1968-04-11 1972-02-08 K D G Instr Ltd Winding apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4453678A (en) * 1981-05-13 1984-06-12 Institute Po Obleklo I Textil Apparatus for the formation of yarn packages
US4564152A (en) * 1984-06-18 1986-01-14 Herriage A A Apparatus for storing and transporting wire on reels and for dispensing wire from the reels
US11925915B2 (en) * 2014-11-05 2024-03-12 Maag Automatik Gmbh Squeezing-roll granulator, granulating system comprising same, and use of the squeezing-roll granulator

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Publication number Publication date
FR2229250A6 (enrdf_load_stackoverflow) 1974-12-06

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