EP3321401A1 - Procédé et appareil de dessin pour machines à filer à jet d'air à alimentations multiples - Google Patents

Procédé et appareil de dessin pour machines à filer à jet d'air à alimentations multiples Download PDF

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Publication number
EP3321401A1
EP3321401A1 EP17198457.8A EP17198457A EP3321401A1 EP 3321401 A1 EP3321401 A1 EP 3321401A1 EP 17198457 A EP17198457 A EP 17198457A EP 3321401 A1 EP3321401 A1 EP 3321401A1
Authority
EP
European Patent Office
Prior art keywords
webs
air spinning
rollers
spinning machines
multiple feeds
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.)
Pending
Application number
EP17198457.8A
Other languages
German (de)
English (en)
Inventor
Fabio D'agnolo
Luca DEOTTO
Carlo Giudici
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.)
Savio Macchine Tessili SpA
Original Assignee
Savio Macchine Tessili 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 Savio Macchine Tessili SpA filed Critical Savio Macchine Tessili SpA
Publication of EP3321401A1 publication Critical patent/EP3321401A1/fr
Pending legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/22—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by rollers only
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/32—Regulating or varying draft
    • D01H5/36—Regulating or varying draft according to a pre-arranged pattern, e.g. to produce slubs
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/04—Guides for slivers, rovings, or yarns; Smoothing dies
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/02—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques imparting twist by a fluid, e.g. air vortex
    • 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
    • D02G3/34—Yarns or threads having slubs, knops, spirals, loops, tufts, or other irregular or decorative effects, i.e. effect yarns

Definitions

  • the present invention relates to a method and a drawing apparatus for air spinning machines, for example of the air-jet type, with multiple feeds.
  • air-jet type spinning apparatuses produce yarn from a single fiber web.
  • the specific area of development of the present invention is that of yarns obtained from multiple webs of fibers, which may be of different materials with different colors (mélange) or different quality, or even of the same material. These multiple feed webs must be appropriately drawn and blended in order to make a yarn with the desired features.
  • the process for obtaining webs with different color or material may be of two types.
  • the first involves weighing the raw materials based on the percentage ratio one wishes to obtain, for example 50% cotton and 50% polyester, and then introducing the web into the standard production cycle.
  • the second type involves the preparation of several webs, usually in the number of six or eight, and of suitable yarn count, which are then processed repeatedly on a drawing frame until a homogeneous web is obtained.
  • the result in both cases, is a blended web of material with good blending of the different fibers to be used to feed the air spinners, e.g. of the air-jet type.
  • the conventional processes described above while guaranteeing good quality in the yarn obtained, are, however, expensive, since the combining of the various blends requires additional care and processing.
  • This known type of processing is currently used for mixture-type yarns and for blended yarns (cotton/polyester, cotton/viscose, etc.).
  • the known solution has the drawback of requiring processing blended material as a single web: in this way, the introducer tube of such a blended web within the drawing devices is subject to fiber contamination, for example, colored material embedded within the blended web itself. This means that the transit from one blended web to another requires first cleaning the introducer tube to prevent contamination of the subsequent web.
  • the known solutions do not allow the use of carded cotton for spinning with air-jet-type systems, as the fiber lengths are too short and the low homogeneity make the processing thereof impossible on current air drawing systems; whereas with the proposed solution, by blending carded fiber with combed fiber at a suitable percentage, carded-type cotton may be spun even with air-jet-type spinning systems.
  • Said apparatus 4 comprises at least a first and a second introducer element, independent of each other, so as to be able to feed simultaneously at least two separate webs of textile fiber N1, N2.
  • Said webs of textile fibers N1, N2 may either be the same or different in quality, yarn count, color and/or material.
  • the apparatus 4 further comprises an air spinning device 16, fed with said webs of textile fiber N1, N2, suitable to produce yarn with certain features.
  • the air spinning device 16 may be of any type, shape and size.
  • the air spinning device 16 comprises a spinning chamber 20, which comprises a plurality of air jets (not shown) oriented in a direction substantially tangential to the same webs N1,N2 input in the same spinning chamber 20, so as to interweave said webs N1, N2 together to obtain a single yarn F in output from the air spinning chamber 20.
  • the spinning chamber 20 may also comprise movable mechanical parts powered by compressed air.
  • the apparatus 4 comprises furthermore a drawing device 24, placed between the introducer elements 8, 12 and the air spinning device 16, comprising a plurality of pairs of drawing rollers 28, comprising at least one drive roller 32 per pair 28, said drawing rollers being suitable to perform a progressive drawing of each web simultaneously intercepted by them, in a known manner.
  • Drive roller 32 means a roller operatively connected to drive means typically electric motors; usually to each drive roller 32 is juxtaposed an idle roller 36 which presses on the webs N1, N2 with a suitable pressure and is put in motion by the drive roller 32 coupled thereto.
  • At least one drive roller 32 of a pair of said drawing rollers 28 of the spinning apparatus 4 is mechanically split into a first drive roller 40 which intercepts a first web N1 and a second drive roller 44 which intercepts the second web N2.
  • Said first and second drive rollers 40,44 are operatively connected to separate drive means so that they may be operated at different speeds of rotation, to perform different degrees of drawing of the two webs N1, N2 intercepted by said first and second drive rollers 40,44.
  • the idle roller 36 juxtaposed to the first and second split drive rollers 40,44 is in turn split into two idle rollers 37,38 so as not to tear or pinch one of the two webs N1, N2.
  • each idle roller 37, 38 by virtue of such splitting, will be able to follow, independently of the other, the degree of drawing (i.e. the speed of rotation) imposed by the corresponding drive roller 40,44.
  • the first and second split drive rollers 40,44 are arranged facing in output with respect to the introducer elements 8,12.
  • the first and second split drive rollers 40,44 are the first rollers that intercept the N1,N2 webs in output from the respective introducer elements 8,12.
  • the webs N1, N2 are fed according to a longitudinal feed direction L, the introducer elements 8,12 are juxtaposed to each other along a transverse direction Z, perpendicular to said longitudinal feed direction L.
  • the longitudinal direction L is typically inclined with respect to a vertical direction Y, perpendicular to a horizontal direction X, parallel to a support plane of the spinning apparatus 4.
  • the first and second split drive rollers 40,44 are aligned parallel to said transverse direction Z and rotate around the transverse rotation axes parallel to the transverse direction Z.
  • the number of pairs of drawing rollers 28 may be varied according to the total drawing ratio to be obtained and is not binding for the purposes of the present invention.
  • the use of two or more webs in the feed and the consequent increase in the size of the incoming web may require the addition of a fifth pair of drawing rollers to ensure the correct distribution of the drawing along its path (where usually 4 pairs of drawing rollers are used).
  • the drawing ratio is given by the ratio between the incoming yarn count and the outgoing yarn count.
  • the addition of a fifth pair of drawing rollers allows the main drawing ratio to be kept constant and does not require the other ratios to be significantly increased, which is much less efficient than carrying out the main drawing with a belt 48.
  • said main drawing is between 20 and 50; each pair of drawing rollers or cylinders 28 carries out a drawing between 1 and 4 times. In total, the drawing should be less than 350. It should be noted that the above values are indicative and not exclusive: for these reasons, such values may be modified without thereby departing from the scope of the present invention.
  • drawing method for multiple-feed air spinning machines with the present invention comprises the steps of:
  • Said two webs N1, N2 of textile fibers may either be the same or different from each other in quality, yarn count, color and/or material.
  • blended yarn F Regardless of whether the individual webs N1, N2 are the same or different, even if only partially from each other, a single blended yarn F will be obtained by the spinning chamber 20: in other words, the concept of blended yarn is to be understood as yarn consisting of at least two starting webs, suitably drawn, regardless of whether the webs are the same or different from each other.
  • Some examples of commonly used blended yarns may be a yarn with a certain yarn count with 50% cotton and 50% polyester or mixture yarns with 60% white and 40% black.
  • the method comprises the step of modifying the degree of drawing of the two webs N1, N2, at the transit of the same webs through said pairs of drawing rollers 28, so as to feed into the entry to the spinning chamber 20 webs that are distinct from each other and drawn with different degrees of drawing, i.e. in a particular ratio, e.g. 60% cotton and 40% polyester.
  • the method comprises the steps of:
  • the method comprises the steps of:
  • the webs N1, N2 are fed in a longitudinal feed direction L; the introducer elements 8,12 are juxtaposed in a transverse direction Z, perpendicular to said longitudinal feed direction L; the split drive rollers 40, 44 are aligned with each other parallel to said transverse direction Z and rotate around transverse rotation axes, parallel to the transverse direction Z.
  • the method comprises the steps of:
  • base webs N1, N2 having the same yarn count is not mandatory, although it represents an advantage over the known solutions, as further described hereinafter. It is, however, possible to use base webs having any starting yarn count and to modify the degree of drawing according to the yarn count of the final yarn F to be obtained.
  • the spinning method comprises the step of directing jets of air onto the webs inside the spinning chamber 20, in a direction substantially tangential to the same webs, so as to interweave said webs N1,N2 together and obtain a single yarn F in output from the air spinning chamber 20.
  • the method and the air-jet type spinning device according to the invention allow the drawbacks presented in the prior art to be overcome.
  • the present invention allows blended yarns to be obtained by maintaining individual webs and merging them only when feeding into the air spinning device, which will blend them in the chamber and thus obtain the same result as traditional methods while skipping all the additional operations (which increase the production times and costs).
  • this method allows the use of combed cotton webs in appropriate blends with carded cotton webs allowing the cotton to be spun with materials that cannot be processed with conventional air spinning systems.
  • Such method also allows the use of two equal webs, having, for example, a single drawing passage instead of the three currently used in conventional air spinning machines, insofar as the defects of the individual webs are statistically reduced in their combining and subsequent blending.
  • the desired percentage of individual materials in the final yarn is obtained by working on the yarn counts of the individual input webs. For example, to obtain a yarn with 60% cotton and 40% polyester, it would be sufficient to feed the machine with two webs having yarn counts Ne 0.18 and Ne 0.27 respectively.
  • the present invention allows the use of webs having all the same yarn count and varying the degree of drawing thereof directly on the spinning machine, obtaining a final yarn having the final predefined yarn count and any blend percentage desired. For example, to obtain a blended 60% cotton 40% polyester yarn, one could use two webs of the same yarn count, for example Ne 0.18, and then draw them 100 and 150 times (or at a ratio of 1.5:1), respectively.
  • This methodology represents a remarkable simplification with respect to the known solutions for the production of blended yarns, because it allows the degree of drawing to be varied without increasing the preparation work, as it is possible to use basic webs having all the same yarn count and to change the degree of drawing according to the final yarn count one desires to obtain and the blend percentage.
  • the different degree of drawing will be calculated automatically by the processing and control unit, after entering the initial yarn count values and the final yarn count value desired.
  • a particularly advantageous application of the present invention is spinning with webs of different quality. It is possible, for example, to insert a carded cotton web, typical of open-end systems, and a combed cotton web (with 1, 2 or 3 drawing passages), typical of air spinning and more "valuable", in variable percentages (from 70% -30% to 90%-10% depending on the quality of the two webs), and be able to process in the air system materials that are typical of open-end systems, obtaining good yarn features which are better than those of the open-end systems at almost double the speed and with lower processing costs.
  • air spinning machines provide for feeding with combed cotton webs with three drawing passages to obtain fiber lengths that are both extremely homogeneous and the longest possible. Clearly, this has, as a drawback, a high cost because it discards much valuable material and increases the overall duration of the processing cycle.
  • the present invention finds an advantageous application also for mono-material yarns (i.e. non-blended), because it provides the possibility of using the feed with a single drawing passage rather than the highly recommended three passages used by the machines currently present in the market with the same final quality of yarn.
  • the defects of the individual webs are added algebraically, giving a resulting web that allows spinning with improved characteristics (especially spinnability).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
EP17198457.8A 2016-10-28 2017-10-26 Procédé et appareil de dessin pour machines à filer à jet d'air à alimentations multiples Pending EP3321401A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102016000109272A IT201600109272A1 (it) 2016-10-28 2016-10-28 Metodo e apparato di stiro per macchine di filatura ad aria con alimentazioni multiple

Publications (1)

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EP3321401A1 true EP3321401A1 (fr) 2018-05-16

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EP17198457.8A Pending EP3321401A1 (fr) 2016-10-28 2017-10-26 Procédé et appareil de dessin pour machines à filer à jet d'air à alimentations multiples

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EP (1) EP3321401A1 (fr)
CN (2) CN207632939U (fr)
IT (1) IT201600109272A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201800010209A1 (it) * 2018-11-09 2020-05-09 Savio Macch Tessili Spa Apparato e metodo di stiro per macchine di filatura ad aria con alimentazioni multiple
IT201900017204A1 (it) * 2019-09-25 2021-03-25 Savio Macch Tessili Spa Apparato e metodo di stiro per macchine di filatura ad aria con alimentazioni multiple

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108660565B (zh) * 2018-05-31 2020-11-24 德州华源生态科技有限公司 三通道喷气涡流混纺纱的生产方法
CN108716038A (zh) * 2018-05-31 2018-10-30 德州华源生态科技有限公司 两通道喷气涡流混纺纱的生产方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2990673A (en) * 1954-01-06 1961-07-04 Celanese Corp Process and apparatus for producing core yarns
US3092953A (en) * 1960-08-01 1963-06-11 Bear Brand Hosiery Co Method and apparatus for forming yarn
JPS5039741B1 (fr) * 1970-08-19 1975-12-19
US4894886A (en) * 1986-09-18 1990-01-23 MurataKikai Kabushiki Kaisha Blended yarn producing device
DE4025312A1 (de) * 1989-08-11 1991-02-14 Murata Machinery Ltd Verfahren und vorrichtung zur herstellung eines gesponnenen fadens
DE4032941A1 (de) * 1990-10-17 1992-04-23 Fritz Stahlecker Verfahren und vorrichtung zum pneumatischen falschdrallspinnen
EP3048192A1 (fr) * 2013-08-22 2016-07-27 Jiaxing University Dispositif et procédé pour réaliser un mélange et un mélange de couleurs sur la base d'un système d'étirage et de retordage à couplage de trois mèches discontinues, et fil coloré préparé par ce procédé
WO2016155163A1 (fr) * 2015-03-27 2016-10-06 江南大学 Procédé et dispositif d'affectation dynamique de densité linéaire et rapport de mélange de fil par étirage asynchrone à quatre composants

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103556320B (zh) * 2013-07-18 2016-10-05 嘉兴学院 基于三粗纱耦合牵伸加捻系统实现混纺及混色的装置及方法
CN104726975B (zh) * 2015-03-27 2018-09-14 江南大学 四组份异同步二级牵伸纺制多彩竹节纱的方法

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2990673A (en) * 1954-01-06 1961-07-04 Celanese Corp Process and apparatus for producing core yarns
US3092953A (en) * 1960-08-01 1963-06-11 Bear Brand Hosiery Co Method and apparatus for forming yarn
JPS5039741B1 (fr) * 1970-08-19 1975-12-19
US4894886A (en) * 1986-09-18 1990-01-23 MurataKikai Kabushiki Kaisha Blended yarn producing device
DE4025312A1 (de) * 1989-08-11 1991-02-14 Murata Machinery Ltd Verfahren und vorrichtung zur herstellung eines gesponnenen fadens
DE4032941A1 (de) * 1990-10-17 1992-04-23 Fritz Stahlecker Verfahren und vorrichtung zum pneumatischen falschdrallspinnen
EP3048192A1 (fr) * 2013-08-22 2016-07-27 Jiaxing University Dispositif et procédé pour réaliser un mélange et un mélange de couleurs sur la base d'un système d'étirage et de retordage à couplage de trois mèches discontinues, et fil coloré préparé par ce procédé
WO2016155163A1 (fr) * 2015-03-27 2016-10-06 江南大学 Procédé et dispositif d'affectation dynamique de densité linéaire et rapport de mélange de fil par étirage asynchrone à quatre composants

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201800010209A1 (it) * 2018-11-09 2020-05-09 Savio Macch Tessili Spa Apparato e metodo di stiro per macchine di filatura ad aria con alimentazioni multiple
EP3650591A1 (fr) * 2018-11-09 2020-05-13 Savio Macchine Tessili S.p.A. Dispositif et procédé d'étirage pour machines à filer à jet d'air à alimentations multiples
US11390968B2 (en) 2018-11-09 2022-07-19 Savio Macchine Tessili S.P.A. Drawing apparatus and method for air spinning machines with multiple feeds
IT201900017204A1 (it) * 2019-09-25 2021-03-25 Savio Macch Tessili Spa Apparato e metodo di stiro per macchine di filatura ad aria con alimentazioni multiple
CN112553720A (zh) * 2019-09-25 2021-03-26 塞维欧纺织机械股份公司 用于具有多个进给器的空气纺纱机的并条设备和方法
EP3798338A1 (fr) * 2019-09-25 2021-03-31 Savio Macchine Tessili S.p.A. Appareil d'étirage et procédé pour machines à filer à jet d'air à alimentations multiples
CN112553720B (zh) * 2019-09-25 2023-12-01 塞维欧纺织机械股份公司 用于具有多个进给器的空气纺纱机的并条设备和方法

Also Published As

Publication number Publication date
CN207632939U (zh) 2018-07-20
IT201600109272A1 (it) 2018-04-28
CN108004629A (zh) 2018-05-08

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