EP0310848A1 - Verfahren und Vorrichtung zur Herstellung von Kerngarnen - Google Patents

Verfahren und Vorrichtung zur Herstellung von Kerngarnen Download PDF

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Publication number
EP0310848A1
EP0310848A1 EP88115301A EP88115301A EP0310848A1 EP 0310848 A1 EP0310848 A1 EP 0310848A1 EP 88115301 A EP88115301 A EP 88115301A EP 88115301 A EP88115301 A EP 88115301A EP 0310848 A1 EP0310848 A1 EP 0310848A1
Authority
EP
European Patent Office
Prior art keywords
yarn
bobbin
covering
core yarn
core
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.)
Withdrawn
Application number
EP88115301A
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English (en)
French (fr)
Inventor
Giovanni Prina
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.)
FILLATTICE SpA
Original Assignee
FILLATTICE SpA
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 FILLATTICE SpA filed Critical FILLATTICE SpA
Publication of EP0310848A1 publication Critical patent/EP0310848A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/26—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre with characteristics dependent on the amount or direction of twist
    • D02G3/28—Doubled, plied, or cabled threads
    • D02G3/285—Doubled, plied, or cabled threads one yarn running over the feeding spool of another yarn
    • 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
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/32—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic
    • 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
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/36—Cored or coated yarns or threads

Definitions

  • the present invention refers to a method and a device for wrapping a covering yarn about a core yarn, particularly rubber or spandex yarns.
  • the invention is also directed to a composite yarn obtained with the claimed method and apparatus.
  • core yarn a rubber or similar yarn, also referred to below as “core yarn” is wrapped with a covering yarn by running it through a rotating follow spindle supporting a bobbin of covering yarn which is rotated at high speed so as to form a "balloon" around the spindle; the covering yarn is continuously wound in helical form around the core yarn due to the rapid rotation of the bobbin on the spindle.
  • This usual covering system (US-A-3 640 057 and US-A-­3 927 515) has a number of limitations and drawbacks, one of which is the need to previously wind the covering yarn on special tubes of limited capacity because of the high rotations; during wrapping operation thus each wrapping unit has to be stopped frequently and the core yarn through the spindle must be broken in order to remove the empty spool and replace it with a new bobbin of covering yarn.
  • all the operations involved in pre-­winding the covering yarn, stopping the wrapping unit, breaking the core yarn and replacing the empty spool with a new bobbin result in a particularly complex and time-consuming system because the wrapping machine is frequently stopped.
  • replacing a bobbin of covering yarn on a spindle which rotates at high speed involves a considerable waste of energy in maintaining large mass of yarn rotating rapidly, thereby limiting the work speed of the machine which cannot exceed certain limits which have proved to be critical.
  • an object of the present invention is to provide a method and a device for wrapping yarns which makes use of an absolutely new wrapping principle, thus eliminating all time-consuming pre-winding operations previously necessary for preparing the bobbins of covering yarn, reducing the number of stops at each textile machine and consequently increasing the productivity of the machine itself.
  • a further object of the invention is to provide a method and a device for wrapping yarns, as defined above, which allows considerable saving of energy, owing to the total absence of yarn masses in rapid rotation.
  • a further object of the present invention is to provide a method and a device of the type refered to, according to which not only is it possible to work with yarn bobbins of greater capacity, thus reducing the number of stops of the wrapping machine for the replacement of empty tubes, but on the basis of which the empty spool for the covering yarn can be replaced without breaking the core yarn, thus improving the characteristics of the composite yarn thereby produced.
  • the above objects can be obtained by means of a method and wrapping device in which the bobbin of core yarn is supported by a bobbin supporting member idly journaled by a rotating hollow shaft and in which the covering yarn run along a arch-shaped guide which is made to rotate around the bobbin from which the covering yarns is unwound; the core and covering yarns are both fed from the lower end of the hollow shaft and thus the two bobbins of yarns can be carried on fixed support members, thus eliminating the need to maintain large mases of yarn in rapid rotation.
  • the wrapping device includes an annular support member 10 for supporting a bobbin 11 of a core yarn 11a to be covered with a second covering yarn 28a helically wrapped around the core yarn; the support member 10 in its turn is idly supported by means of a pair of coaxially arranged upper and lower shafts 12 and 13, on the frame 14 of a textile machine.
  • the shafts 12 and 13 an rotate, both with respect to frame 14 of the machine, and with respect to support member 10 for the bobbin 11; thus, to avoid any undesired rotation of bobbin support member 10, magnetic checking means 15, 16 or other suitable means which will allow free rotation of a yarn guide tube 17 around member 10, as explained below, have been provided.
  • the checking means comprises permanent magnet cores 15, 16 facing opposite polarities, said magnet cores being positioned on frame 14 and support member 10 at a suitable distance to allow the yarn guide tube 17 to rotate.
  • the support member 10 for the bobbin 11 of core yarn for example a rubber yarn which must be covered with another type of yarn, is quadrangular or annular shaped, having bearings 18 and 19 for shafts 12 and 13 on two horizontal sides.
  • This support member 10 delimits a central opening in which a core yarn bobbin 11 is positioned; the bobbin is kept in a horizontal position, rotating around its longitudinal axis, so as to facilitate continuous and regular unwinding of the core yarn 11a.
  • Bobbin 11 can be supported by any suitable means e.g., as shown, by means of a pair of horizontal rollers 10 and 21, on which bobbin 11 just rests.
  • rollers 20 and 21 are practically positioned inside the bobbin support member 10, around which the arch-shaped guide tube 17 for the covering yarn rotates, rotation of roller 20 can be controlled by, for example, a magnetic coupling consisting of two opposed discs 23 and 24 incorporating permanent magnets having alternate polarities, and suitably spaced so as to create a gap sufficient for tube 17 to pass.
  • One of the discs, 24, is connected to one end of roller 20, while the other disc, 23, is connected to a drive motor 25. It should however be pointed out that other support and drive systems for bobbin 10 of the core yarn can be used.
  • core yarn 11a is guided along a linear path consisting of a channel or guide bore 26 through the upper shaft 12 said bore 26 being coaxial to the rotational axis of the shaft itself.
  • Lower shaft 13 rotates idly while upper shaft 12 is rotated by a control means such as, for example, a motor drive 27, one for each device, or, in any event, for more than one device on the same textil machine.
  • core yarn 11a must be helically wound with a covering yarn 28a which is unwound from a bobbin 28.
  • Bobbin 28 is placed underneath the support member 10 for the bobbin 11 of core yarn so that yarn 28a is fed out at a point, 13a, in its path which is coaxial to the rotational axis of guide tube 17.
  • Bobbin 28 can be fixed or caused to rotate at a low velocity sufficient to unwind the yarn at a required tensil stress.
  • yarn 28a unwound from bobbin 28 is guided along a separate path defined by the above mentioned arch-shaped tube 17.
  • yarn 28a enters 13a axially, and then proceeds in a channel or bore 29 of lower shaft 13 to which the lower end of guide tube 17 is attached, and then continues, running through tube 17, whose upper end is connected to upper shaft 12 in correspondence with a channel or bore 30, having end 30a in a position eccentric or radially spaced from exit 26a of core yarn 11a from axial bore 26 on the same shaft 12.
  • number 31 in figure 1 indicates a yarn guide ring which deviates the covered yarn 32, to a bobbin 33.
  • core yarn 11a which must be covered, is unwound continuously from bobbin 11 caused to rotate by roller 20, and fed along axial bore 26 in upper shaft 12 towards yarn guide ring 31.
  • covering yarn 28a is unwound from bobbin 28, fed continuously along path 29, 17, 30 towards yarn guide ring 31, exiting from upper shaft 12 in a position 30a radially spaced from the axial exit 26a for the core yarn 11a.
  • tube 17 and shafts 12, 13 are rotated they cause covering yarn 28a to rotate around support member 10 and core yarn bobbin 11; owing to spaced disposition of exit 30a from exit 26a, covering yarn 28a winds helically around core yarn 11a from a point 32a, whose position will depend on the specific operational parameters of the device and on its constructional characteristics, such as the rotational speed of tube 17, the velocity at which the yarns are fed, the position of yarn guide ring 31, and the radial distance between exit points 26a and 30a.
  • bobbin 28 of covering yarn is no longer supported by a rotating spindle and is practically stationary, and thus bobbins of high capacity can be used, eliminating the prewinding operations previously required.
  • the masses of yarn, although greater that those of traditional wrapping machines, are now stationary or turning at a low speed required for the yarn to be correctly unwound, and energy consumption is consequently drastically reduced, while, at the same time the operations involved in replacing the spools are significantly simplified, since they are now greatly facilitated by the complete independence of the paths for the two yarns.
  • the device in figure 1 can be differently carried out while maintaining the innovative principles of the invention: for example, so as to cover with two crossed threads, as indicated in figure 3.
  • covering yarn bobbin 11 rest on rollers, not shown, which are positioned on an annular bobbin support member 10 journaled on shafts 12 and 13.
  • a first covering yarn 28a unwound from bobbin 28 is guided along a first curved path defined by the arch-shaped tube 17, or, in an equivalent way, between a first lower shaft 13 and the upper shaft 12.
  • Reference 27 again indicates a drive for the upper shaft 12 which, for example, caused tube 17 to rotate in a clockwise direction.
  • reference 34 indicates a bobbin for a second covering yarn 34a, which axially enters a bore 35a in a second lower shaft 35 aligned with the preceding ones.
  • Bore 35a is connected to the lower end of a second tube 36, defining a second arch-shaped path for the second covering yarn, 34a;
  • second guide tube 36 is in turn connected to a bore 37 in an upper rotating ring 38, coaxially supported by the upper shaft 12.
  • Exit point 37a of covering yarn 34a from bore 37 of upper ring 38 is radially spaced with respect to exit 30a of the first covering yarn.
  • a second drive 39 is provided to rotate ring 38 and guide tube 36 in a direction opposite to that of shaft 12 and tube 17, with an equal or different angular velocity so as to obtain helical cross-winding of the two covering yarns 28a and 34a on the core yarn 11a.
  • figure 4 illustrates a further embodiment comprising a conical flange or disc 40, connected to lower shaft 13 in the figure referred to; the wall of disc 40 includes a bore defining part of the path of the covering yarn, which continues in the tube guide, as shown.
  • Disc 40 acts as a flywheel and can be counterbalanced in a position diametrically opposed to tube 17 so as to allow the covering yarn to rotate regularly, particularly in devices operating at high velocity.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
EP88115301A 1987-10-09 1988-09-19 Verfahren und Vorrichtung zur Herstellung von Kerngarnen Withdrawn EP0310848A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2218787 1987-10-09
IT8722187A IT1222853B (it) 1987-10-09 1987-10-09 Procedimento ed apparecchiatura per la ricopertura di filati

Publications (1)

Publication Number Publication Date
EP0310848A1 true EP0310848A1 (de) 1989-04-12

Family

ID=11192779

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88115301A Withdrawn EP0310848A1 (de) 1987-10-09 1988-09-19 Verfahren und Vorrichtung zur Herstellung von Kerngarnen

Country Status (2)

Country Link
EP (1) EP0310848A1 (de)
IT (1) IT1222853B (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992005302A1 (en) * 1990-09-25 1992-04-02 Regal Manufacturing Company, Inc. Apparatus and method for forming elastic corespun yarn
FR2679261A1 (fr) * 1991-07-16 1993-01-22 Ic Bt Lyon Machine de cablage de fils comportant un ensemble regulateur de tension et de longueur perfectionne.
GB2345049A (en) * 1998-12-23 2000-06-28 Adria Ltd A method for covering a core yarn with a cover yarn
GB2394938A (en) * 2002-10-19 2004-05-12 Adria Ltd A method for covering a core yarn with a cover yarn
FR2919000A1 (fr) * 2007-07-16 2009-01-23 Ritm Soc Par Actions Simplifie Procede pour la production de fils cables a resistance elevee,notamment pour les structures de renfort pour matieres composites,et le dispositif de mise en oeuvre
CN104775208A (zh) * 2015-04-10 2015-07-15 东华大学 一种花式纱装置
CN107022821A (zh) * 2016-01-29 2017-08-08 东华大学 一种包缠纱线的加工装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH272803A (de) * 1949-03-04 1951-01-15 William Kenyon And Sons Limite Vorrichtung zur Erteilung von Drall.
US2737773A (en) * 1952-07-24 1956-03-13 Us Rubber Co Apparatus for making elastic yarn
FR1128307A (fr) * 1954-07-28 1957-01-04 Dunlop Sa Appareil pour retordre les fils textiles
FR1234291A (fr) * 1959-05-15 1960-10-17 Perfectionnements aux retordeuses pour fils textiles et analogues
DE7443364U (de) * 1974-12-30 1977-08-11 Palitex Project-Company Gmbh, 4150 Krefeld Doppeldrahtzwirnspindel mit einer im Bereich der Spindelhohlachse angeordneten druckluftbetätigten Einfädelvorrichtung
GB2064600A (en) * 1979-11-30 1981-06-17 Hori Y Yarn covering apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH272803A (de) * 1949-03-04 1951-01-15 William Kenyon And Sons Limite Vorrichtung zur Erteilung von Drall.
US2737773A (en) * 1952-07-24 1956-03-13 Us Rubber Co Apparatus for making elastic yarn
FR1128307A (fr) * 1954-07-28 1957-01-04 Dunlop Sa Appareil pour retordre les fils textiles
FR1234291A (fr) * 1959-05-15 1960-10-17 Perfectionnements aux retordeuses pour fils textiles et analogues
DE7443364U (de) * 1974-12-30 1977-08-11 Palitex Project-Company Gmbh, 4150 Krefeld Doppeldrahtzwirnspindel mit einer im Bereich der Spindelhohlachse angeordneten druckluftbetätigten Einfädelvorrichtung
GB2064600A (en) * 1979-11-30 1981-06-17 Hori Y Yarn covering apparatus

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992005302A1 (en) * 1990-09-25 1992-04-02 Regal Manufacturing Company, Inc. Apparatus and method for forming elastic corespun yarn
US5303550A (en) * 1990-09-25 1994-04-19 Regal Manufacturing Company, Inc. Apparatus and method for forming elastic corespun yarn
FR2679261A1 (fr) * 1991-07-16 1993-01-22 Ic Bt Lyon Machine de cablage de fils comportant un ensemble regulateur de tension et de longueur perfectionne.
US6718748B1 (en) 1998-12-23 2004-04-13 Adria Limited Yarn covering apparatus and method
AU764940B2 (en) * 1998-12-23 2003-09-04 Adria Limited Yarn covering apparatus and method
GB2345049B (en) * 1998-12-23 2003-09-17 Adria Ltd Yarn covering apparatus and method
GB2345049A (en) * 1998-12-23 2000-06-28 Adria Ltd A method for covering a core yarn with a cover yarn
GB2394938A (en) * 2002-10-19 2004-05-12 Adria Ltd A method for covering a core yarn with a cover yarn
FR2919000A1 (fr) * 2007-07-16 2009-01-23 Ritm Soc Par Actions Simplifie Procede pour la production de fils cables a resistance elevee,notamment pour les structures de renfort pour matieres composites,et le dispositif de mise en oeuvre
WO2009019359A2 (fr) * 2007-07-16 2009-02-12 Ritm Procede pour la production de fils cables a resistance elevee, notamment pour les structures de renfort pour matieres composites, et le dispositif de mise en œuvre
WO2009019359A3 (fr) * 2007-07-16 2009-03-26 Ritm Procede pour la production de fils cables a resistance elevee, notamment pour les structures de renfort pour matieres composites, et le dispositif de mise en œuvre
CN104775208A (zh) * 2015-04-10 2015-07-15 东华大学 一种花式纱装置
CN104775208B (zh) * 2015-04-10 2017-09-19 东华大学 一种花式纱装置
CN107022821A (zh) * 2016-01-29 2017-08-08 东华大学 一种包缠纱线的加工装置

Also Published As

Publication number Publication date
IT8722187A0 (it) 1987-10-09
IT1222853B (it) 1990-09-12

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