US20070277494A1 - Method for Producing a Yarn in a Jet Spinner - Google Patents

Method for Producing a Yarn in a Jet Spinner Download PDF

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Publication number
US20070277494A1
US20070277494A1 US11/547,820 US54782005A US2007277494A1 US 20070277494 A1 US20070277494 A1 US 20070277494A1 US 54782005 A US54782005 A US 54782005A US 2007277494 A1 US2007277494 A1 US 2007277494A1
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US
United States
Prior art keywords
spinning
yarn
fiber
tension
jet
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.)
Abandoned
Application number
US11/547,820
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English (en)
Inventor
Herbert Stalder
Peter Artzt
Heinz Muller
Kurt Ziegler
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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 Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Assigned to MASCHINENFABRIK RIETER AG reassignment MASCHINENFABRIK RIETER AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ARTZT, DR., PETER, MULLER, HEINZ, ZIEGLER, KURT, STALDER, DR. HERBERT
Publication of US20070277494A1 publication Critical patent/US20070277494A1/en
Abandoned legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/11—Spinning by false-twisting
    • D01H1/115—Spinning by false-twisting using pneumatic means
    • 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
    • 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
    • D01H4/42—Control of driving or stopping

Definitions

  • the invention relates to a method for producing a yarn in a jet spinner according to the preamble of patent claim 1 .
  • Jet spinners have a multiplicity of spinning stations.
  • a yarn is spun from a longitudinal fiber structure which is supplied.
  • the longitudinal fiber structure is first refined, that is to say the fiber quantity per unit length is reduced by drafting.
  • the spinning station the refined fiber composite is spun into a yarn by imparting twist to it.
  • the spinning station has a fiber guide element which guides the fiber composition into a swirl chamber where a yarn is produced on a spindle by means of the known vortex jet spinning method.
  • FIG. 1 shows a diagrammatic illustration of the components of a jet spinner.
  • the longitudinal fiber structure 1 is refined in a drafting arrangement 69 , spun into a yarn 70 in the spinning box 5 and supplied to a yarn bobbin 68 via a thread transfer device 67 by means of take-off rollers 64 .
  • the term spinning tension F s is understood in this context to mean the force F s , to be given in the units [N] or [cN], which acts on the yarn between the spinning box 5 and take-off 63 .
  • the spinning box 5 has a swirl chamber 10 in which the air flowing in through the air inlet port 61 generates a swirl flow which rotates around edge fibers 62 located on the surface of the fiber composite 1 and thereby spins the fiber composition 1 into a yarn 70 .
  • the abovementioned spinning tension F s is caused mainly by the run-on of edge fibers 62 at the inlet mouth 9 of the spindle 7 .
  • These forces consequently have a particular characteristic which is basically different from the tension characteristics of other methods, such as, for example, ring, rotor or two-nozzle spinning.
  • spinning tension F s essentially the rotating fiber ends or the subsequent wrap-around fibers of the spun yarn 70 cause the spinning tension F s , there is a direct correlation between the spinning result, that is to say the yarn produced, and the actual measurable spinning tension F s .
  • the term “spinning result” embraces the properties of yarn quality and spinning process reliability. By reduction in the spinning speed, the spinning tension can also be reduced to values which permit an improved spinning result.
  • edge fibers should ideally be spun into a yarn 70 at an angle of approximately 45° around the fiber composite 1 . This angle, then, taking into account the air vortex, is determined essentially by the spinning speed, and this must therefore move within a customary range toward 300 m/min.
  • the object on which the present invention is based is, therefore, to specify a method for spinning a yarn in a jet spinner, in which, despite high spinning speeds, an ideal spinning tension can be set, with the result that an optimal spinning result, particularly with regard to the yarn quality, is achieved.
  • the spinning tension F s has a value range F s ⁇ 20 cN
  • a method is provided which in the case of high speeds allows a spinning tension which ensures, in particular, high reliability, so that, for example, the risk of yarn breaks is greatly reduced.
  • FIG. 1 shows a diagrammatic illustration of the components of a jet spinner
  • FIG. 2 shows a partial illustration of a spinning box, particularly to explain the entry of a fiber composite into the spindle;
  • FIG. 3 shows a fiber conveyance duct with a tunnel lining
  • FIG. 4 shows a more detailed illustration of the shoulder of the tunnel lining and, of the air inlet port in the first embodiment
  • FIG. 5 shows a more detailed illustration of the shoulder of the tunnel lining and of the air inlet port in a second embodiment
  • FIG. 6 shows an illustration of a fiber guide face having a deflection edge, in a fiber guide duct.
  • FIG. 1 shows a diagrammatic illustration of the components of a jet spinner: the speeds which occur are shown by v exit and v take-off , and reference symbol 71 indicates the location at which the method parameter, spinning tension F s , relevant to this invention occurs.
  • FIG. 2 shows a detailed illustration of a spinning box 5 , such as corresponds to the prior art and has already been explained in the description introduction.
  • FIG. 3 shows a first configuration within a spinning box 5 to ensure that the desired spinning tension F s is achieved.
  • the spinning box 5 has a fiber guide element 3 and, thereafter, a spindle 7 with a yarn guide duct 8 .
  • the fiber guide element 3 is surrounded by a hollow-cylindrical tunnel lining 17 .
  • the tunnel lining 17 may be produced in one piece or in a plurality of pieces.
  • the fiber conveyance duct 4 is encased by the tunnel lining 17 .
  • the tunnel lining 17 is shaped in such a way that a shoulder 18 toward the swirl chamber housing 15 occurs at the end of the fiber conveyance duct 4 .
  • the end face of the shoulder 18 serves as a guide face for the fluid, normally air, emerging from the jet nozzles 13 .
  • the outlet ports for the jet nozzles for the fluid into the swirl chamber 14 . 1 have an elliptic shape.
  • the fiber guide element 3 and the associated tunnel lining 17 are installed in the swirl chamber housing 15 .
  • the swirl chamber housing 15 does not necessarily also have to comprise the fiber guide element 3 and its tunnel lining 17 .
  • the two last-mentioned elements may also have a specific housing which is contiguous to the swirl chamber housing 15 (see FIG. 5 ).
  • four individual jet nozzles 13 . 1 are provided.
  • the jet nozzles 13 . 1 have an angle of inclination a with respect to the fiber transport-direction 19 .
  • the angle of inclination a lies in a value range of 45° to 88°.
  • the angle of inclination of the end face of the shoulder 18 with respect to the material flow direction has the same amount.
  • end face 20 of the fiber guide element 3 which is contiguous to the swirl chamber 14 . 1 has the same angle of inclination with respect to the material flow direction 19 as the bores of the jet nozzles 13 . 1 .
  • FIGS. 4 and 5 show two further embodiments of the shoulder of the tunnel lining to ensure that the desired spinning tension F s is achieved.
  • the swirl chamber housing 15 in this case adjoins a housing 32 for the fiber guide element 3 and the tunnel lining.
  • the embodiment shown according to FIG. 4 possesses a tunnel lining 26 which is shaped in such a way that the shoulder 29 occurs at the end of the fiber conveyance duct 4 with an angle of inclination ⁇ .
  • the tunnel lining 26 preferably has a thickness (a) which lies in a value range of 0.1 to 3 mm.
  • the bore of the jet nozzle 13 . 1 is arranged in the immediate vicinity of the end face of the shoulder 29 in the swirl chamber housing 15 .
  • the shoulder 29 is in this case arranged so near to the opening to the jet nozzle 13 . 1 that the end face of said shoulder serves as a guide face for the emerging flow.
  • the shoulder 29 is arranged in alignment with the bore which is itself arranged in alignment with the inner face or surface area of the swirl chamber 14 . 1 , so that the bore 13 . 1 runs “tangentially in alignment” into the inside of the swirl chamber housing 15 or tangentially into the swirl chamber 14 . 1 .
  • angles of inclination ⁇ with respect to the material flow direction which lie in a value range of 60° to 70° are preferred.
  • the angle of inclination ⁇ of the end face of the shoulder 29 may have a different value from the angle of inclination ⁇ .
  • the bore 13 . 1 is arranged at a distance d from the shoulder 31 of the tunnel lining 28 .
  • the distance d in this case lies in a value range of 0.5 mm to 2 mm, preferably 0.9 mm to 1.3 mm, preferably 1.1 mm.
  • FIG. 6 shows a cross section through a spinning box 5 in another embodiment, in order to achieve the method parameter value according to the invention of the spinning tension F s ⁇ 20 cN.
  • the fiber guide element 3 c shown has a fiber guide face 16 with a deflection point 72 .
  • the deflection point 72 is formed by the fiber guide face 16 : the fiber guide face 16 in this case consists of two planar faces, the common intersection line of which forms the deflection point 72 .
  • the deflection point 72 is in this case dimensioned such that the fibers of the fiber composite 1 are deflected in such a way that the free fiber ends of the fibers which are located in the fiber composite can lift off.
  • both the front and the rear fiber ends above all of those fibers which are located on the surface of the fiber composite 1 or directly below it are lifted off.
  • both front and rear fiber ends are lifted off.
  • the term “free fiber ends” is to be understood as meaning those ends which do not lie within the staple fiber composite or are not connected to other fibers and can consequently be picked up by the swirl flow.
  • the air (fluid) to be supplied preferably has a pressure p which lies in the following value range: 3 bar ⁇ p ⁇ 6 bar.
  • a spinning draft S v ⁇ 1.0.
  • the condition S v ⁇ 1.0 means that the circumferential speed of the take-off rollers 64 must be at most equal to that of the exit rollers 2 of the drafting arrangement 69 . It is therefore possible to obtain this condition because, during the spinning of the fibers, the fiber composite slightly loses length.
  • S v in this case preferably lies in the range of 0.96 to 1.0.
  • This relation is not a physical formula which necessarily arises due to the operation of the spinning station. Instead, this formula indicates the optimal spinning tension which is to be achieved on account of the operating conditions of yarn delivery speed at the exit of the spinning machine and desired yarn fineness (what is known as the “metric number” of the spun yarn in [m/g]) by the adaption of the most diverse possible elements of the spinning machine.
  • the optimal spinning tension which is to be achieved on account of the operating conditions of yarn delivery speed at the exit of the spinning machine and desired yarn fineness (what is known as the “metric number” of the spun yarn in [m/g]) by the adaption of the most diverse possible elements of the spinning machine.
  • metric number what is known as the “metric number” of the spun yarn in [m/g]
  • the following table 2 contains in the middle column the optimal spinning tension F s, optimal calculated from the metric number and spinning speed; the spread values defined as ⁇ 20% are given in the first two columns.
  • TABLE 2 Table of values with the calculated optimal spinning tension F s,optimal Spinning Spinning tension tension F s,optimal F s,optimal lower limit upper limit Spinning Metric Spinning ( ⁇ 20%) in (+20% in tension number mN speed v L [cN] [cN] F s,optimal [cN] [g/m] [m/min] 7.664 11.496 9.580 50 400 7.110 10.666 8.888 60 380 6.480 9.720 8.100 70 350 5.696 8.544 7.120 80 300
  • the teaching according to the invention can be implemented by means of a free combination and adaption of the configuration, explained above in FIGS. 3 to 6 , of the spinning box 5 and of its spinning box elements, such as, for example, the fiber inlet edge 31 , fiber discharge edge 29 or deflection point 72 , and also freely by means of the abovementioned operating parameters of pressure and spinning draft.
  • the elements mentioned in the preceding description and claimed below being adapted, it is possible to bring the actual measurable spinning tension F s to a value F s ⁇ 20 cN.
  • the actual measurable spinning tension F s even has a value which corresponds to the amount according to the abovementioned formula for F s,optimal .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US11/547,820 2004-04-07 2005-04-07 Method for Producing a Yarn in a Jet Spinner Abandoned US20070277494A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP04008478.2 2004-04-07
EP04008478A EP1584715A1 (de) 2004-04-07 2004-04-07 Verfahren zum Herstellen eines Garnes in einer Luftspinnmaschine
PCT/CH2005/000201 WO2005098103A1 (de) 2004-04-07 2005-04-07 Verfahren zum herstellen eines garns in einer luftspinnmaschine.

Publications (1)

Publication Number Publication Date
US20070277494A1 true US20070277494A1 (en) 2007-12-06

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US11/547,820 Abandoned US20070277494A1 (en) 2004-04-07 2005-04-07 Method for Producing a Yarn in a Jet Spinner

Country Status (4)

Country Link
US (1) US20070277494A1 (de)
EP (2) EP1584715A1 (de)
CN (1) CN1965115A (de)
WO (1) WO2005098103A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110809650A (zh) * 2017-06-16 2020-02-18 里特机械公司 喷气纺纱机的工作位以及打开喷丝头的方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012102432A (ja) * 2010-11-10 2012-05-31 Murata Mach Ltd 空気紡績装置、紡績ユニット及び空気紡績装置を用いた紡績方法
FR2982869A1 (fr) 2011-11-17 2013-05-24 Jean-Christophe Leger Additif a base de poudre de charbon vegetal pour matrice polymere ou similaire
DE102012108613A1 (de) * 2012-09-14 2014-03-20 Maschinenfabrik Rieter Ag Spinnstelle einer Vorspinnmaschine
DE102020108257A1 (de) 2020-03-25 2021-09-30 Saurer Spinning Solutions Gmbh & Co. Kg Vorrichtung zur Faservereinzelung und Spinneinrichtung umfassend eine solche Vorrichtung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030177751A1 (en) * 2002-02-12 2003-09-25 Maschinenfabrik Rieter Ag Textile processing machine with a fibre conveying channel and a fibre-guiding surface
US20040016223A1 (en) * 2002-03-20 2004-01-29 Maschinenfabrik Rieter Ag Tunnel cladding
US20040025488A1 (en) * 2000-09-22 2004-02-12 Peter Anderegg Spinning device
US20040123581A1 (en) * 2002-10-24 2004-07-01 Maschinenfabrik Rieter Ag Adjustable spinning distance

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040025488A1 (en) * 2000-09-22 2004-02-12 Peter Anderegg Spinning device
US20030177751A1 (en) * 2002-02-12 2003-09-25 Maschinenfabrik Rieter Ag Textile processing machine with a fibre conveying channel and a fibre-guiding surface
US20040016223A1 (en) * 2002-03-20 2004-01-29 Maschinenfabrik Rieter Ag Tunnel cladding
US20040123581A1 (en) * 2002-10-24 2004-07-01 Maschinenfabrik Rieter Ag Adjustable spinning distance

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110809650A (zh) * 2017-06-16 2020-02-18 里特机械公司 喷气纺纱机的工作位以及打开喷丝头的方法

Also Published As

Publication number Publication date
EP1584715A1 (de) 2005-10-12
EP1747310A1 (de) 2007-01-31
CN1965115A (zh) 2007-05-16
WO2005098103A1 (de) 2005-10-20

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Owner name: MASCHINENFABRIK RIETER AG, SWITZERLAND

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:STALDER, DR. HERBERT;ARTZT, DR., PETER;MULLER, HEINZ;AND OTHERS;REEL/FRAME:019383/0268;SIGNING DATES FROM 20070212 TO 20070213

STCB Information on status: application discontinuation

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