EP0131170A1 - Procédé et dispositif de filature par fausse-torsion - Google Patents

Procédé et dispositif de filature par fausse-torsion Download PDF

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Publication number
EP0131170A1
EP0131170A1 EP84106801A EP84106801A EP0131170A1 EP 0131170 A1 EP0131170 A1 EP 0131170A1 EP 84106801 A EP84106801 A EP 84106801A EP 84106801 A EP84106801 A EP 84106801A EP 0131170 A1 EP0131170 A1 EP 0131170A1
Authority
EP
European Patent Office
Prior art keywords
sliver
fiber
false twist
yarn core
pair
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.)
Granted
Application number
EP84106801A
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German (de)
English (en)
Other versions
EP0131170B1 (fr
Inventor
Herbert Stalder
Emil Briner
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.)
Maschinenfabrik Rieter AG
Original Assignee
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=4260172&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0131170(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Priority to AT84106801T priority Critical patent/ATE36357T1/de
Publication of EP0131170A1 publication Critical patent/EP0131170A1/fr
Application granted granted Critical
Publication of EP0131170B1 publication Critical patent/EP0131170B1/fr
Expired 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
    • 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
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/11—Spinning by false-twisting

Definitions

  • the problems of the yarns produced by the false twist spinning process with regard to further processing into the finished fabric lie essentially in the uniformity, strength and elongation.
  • non-measurable, recurring weak points even with the highest measured strength of the yarn, are major disadvantages in the slip and weaving processes, or nits also reduce the value of the finished fabric in the case of yarns which are problem-free for the subsequent processing processes.
  • a method and a device according to the preamble of the first method and the first device claim are known from Swiss Patent No. 615 467.
  • a delivered sliver 2 is calibrated in a drafting device 1 by a funnel 5 or 6 provided in front of a pair of input rollers 3 and in front of an intermediate roller 4 through a pair of straps 8 directed by the intermediate roller pair 4 against an output roller pair 7 (the roller pairs are indicated by dashed lines).
  • the sliver 2 is released from the pair of straps 8 (only the lower strap is shown) with a width BA and fed to the clamping line K formed by the pair of output rollers 7.
  • the sliver experiences a spread due to the circumferential air of the rotating pair of output rollers which is conveyed into this space and escapes in the axial direction, which is limited to a width BB by the funnel 9.
  • the difference in the width BB to the smaller width BC of the spinning triangle gives rise to the edge fibers F mentioned, which are sucked into an intake duct 10 and at the latest at the narrowest point of the intake duct, i.e. in front of the throttle point 11 are largely gripped by the rotating, incorrectly rotated yarn core 12.
  • the rotation of the yarn core 12 is caused by the pneumatic false twist element 13 connected downstream of the throttle point 11.
  • the main disadvantage of this method is insufficient yarn uniformity in terms of mass uniformity, weak points and nits.
  • the strength of the yarn is also much lower than that of normal ring spun yarns. This insufficient uniformity is essentially due to the fact that the fiber spreading mentioned is random and uncontrolled.
  • the object is achieved in that the drawn fiber sliver is released from the output rollers in such a width that only part of the width of the drawn fiber sliver is gripped by the spinning triangle, that is to say it is turned into an incorrectly twisted yarn core, and that the spinning triangle does not grasp it So-called edge fibers are sucked in and guided by means of the intake air flow in such a way that the front end of a fiber with a length corresponding to the average length of the processed fibers, as seen in the direction of conveyance of the yarn core, is then captured by the rotating yarn core if it is ensured that this fiber only then the nip line of the exit roller pair leaves after being rotated around the yarn core in the same direction, but at a steeper slope than the yarn core, until it has been caught in the spinning triangle and thereby the rear end is bound in the yarn core while the device is being tied according to the invention indicates that the drafting device has means in front of its pair of output rollers delivering the fiber sliver to the intake
  • the advantages achieved by the invention are a yarn with the aforementioned properties which is more uniform and has high strength.
  • a fiber ribbon 102 in a preliminary drafting zone between an input rollers - pair 103 and an intermediate roller pair 104, and drawn in a main drafting zone between the intermediate roller pair 104 and a pair of output rollers 105 to a finished yarn count and in a false twist spinning unit 106 (in Section shown) turned into a yarn 107.
  • the drafting system further comprises a condenser 108 in front of the input roller pair 103 as the first sliver guide element, and in front of the intermediate roller pair 104 as two tes sliver guide element a condenser 109 and in front of the exit roller pair 105 as a further sliver guide element a strap pair 110, consisting of an upper strap 111 and a lower strap 112.
  • the guides of the roller pairs and straps are known per se and are not the subject of the invention.
  • the condenser 108 serves the primary and the condenser 109 the secondary guidance of the sliver 102.
  • the inside width of these condensers is such that the sliver between the straps has a width Bl of 10-19 mm, preferably for a yarn titer of approx. 15 tex 14 - 15 mm.
  • this width B1 essentially unchanged up to the clamping line K generated by the exit rollers 105, as a first measure one of the two straps of the pair of straps 110 is brought further into the converging space 113 of the exit rollers 105 than the other strap, for example the lower strap 112 .
  • This measure results in a deflection of the fiber sliver at the deflection point 114 of the apron 112 out of the plane (not shown) in which the clamping line K and the clamping line given by the intermediate rollers 104 (not shown) are contained.
  • This deflection which is pushed into the converging space 113, also results in additional fiber guidance on a surface piece of the upper roller 105A of the output rollers 105 characterized by the angle ⁇ (FIG. 2).
  • the straps 111 and 112 are guided so close to the corresponding roller of the output rollers 105 that the distances M, respectively. N, are approximately zero, so that the air flow resulting from the rotating output rollers 105 is practically prevented from flowing into the converging space 113.
  • the false twist spinning unit 106 connected downstream of the pair of output rollers essentially comprises an intake duct 115, a throttle point 116 known from Swiss Patent No. 615 467 and a pneumatic false twist element 117 with at least one air inflow duct 118.
  • This rotation creates a spinning triangle delimited by the clamping line K with a width B2 (shown in FIGS. 3 and 6) given by the intensity of the rotation, which should be significantly smaller than the fiber bandwidth Bl mentioned earlier, ie the width Bl becomes inherent
  • the resulting width B2 depending on the processed average fiber length and spun yarn titer, is selected in such a way that a sufficient number of edge fibers F is present for the winding around the yarn core 119 is there.
  • This greater slope is caused by the winding moving around at a higher speed than the advancement of the yarn core in the direction opposite to the yarn advancement, i.e. towards the spinning triangle, and ensures that the rear fiber end is still covered by the clamping line K that this end is screwed into the spinning triangle, so that the rear fiber end subsequently released by the clamping line K remains in the yarn core of the finished yarn.
  • the slope is so much steeper than the speed of the mentioned hiking is great.
  • the distance D between the narrowest point of the intake duct 115 and the clamping line K must be less than the length of the edge fiber F. If the front fiber end is twisted too early, the wrapping length of the edge fiber can be such shorten that the wrapping strength given by the adhesive length of the wrapping fiber is not sufficient to give the finished yarn sufficient tensile strength.
  • the spinning triangle is repeatedly and variably divided into smaller spinning triangles with the different width b2 (FIG. 6a), so that the edge fibers F not only have to occur in the edge parts of the width B1, but edge fibers F also of the entire width B1 are distributed outside and between the individual small spinning triangles.
  • the division into small spinning triangles has the advantage that these edge fibers, as shown in FIG. 6a, can be distributed over the width B1, which results in a statistically uniform occurrence of these edge fibers F.
  • certain fibers a spinning triangle forming the fiber structure leaving the nip line K is a still not included in the spinning triangle, namely, for example, when the adhesive force between these fibers and the rolls g roasting ser than to the other, the spinning triangle forming fibers.
  • Such fibers like the so-called edge fibers F, remain free with their front ends until, like the edge fibers F, they are caught by the rotating yarn core 119 and likewise form wrapping fibers.
  • the optimal distance D should correspond to approximately 70% of the average spun fiber length, but should not be less than 60% of this average fiber length.
  • the usable range for the distance D is 60-75% of the average spun fiber length.
  • the finished yarn is passed from a take-off roller pair (not shown) provided after the false twist unit to a bobbin unit (not shown) from a substantially untwisted yarn core 120 (FIG. 9), which is held together by surrounding fibers F, now called winding fibers F1.
  • the slope a A (FIG. 9) of these wrapping fibers F1 essentially corresponds to the slope difference d (FIG. 7), which results from the difference between the slope ( ⁇ ) of the yarn core 119 and the slope ( ⁇ ) of the edge fibers F.
  • the winding direction of the wrapping fibers F1 is opposite to that of the edge fibers F, i.e. if the edge fibers in front of the swirl organ had an S direction, the wrapping fibers had a Z direction.
  • the wound fibers have a position over part of their length and for a short moment, which is parallel to the longitudinal axis of the yarn core, until they increasingly take on the opposite direction of twist as the untwisting continues.
  • width .B ⁇ which can be selected, for example, by the action of the condenser 108, 109, also contributes to the advantages mentioned can provide a sufficient and secure number of edge fibers F which are essentially constant over time for the winding.
  • FIG. 4 shows a variant of the false twist unit 106 in that a suction part 123 is provided between the suction channel 115A and the throttle point 116.
  • This suction part consists of a short space 124 connecting the suction channel 115A and the throttle point 116 and a suction hole 125 connecting this space to the surroundings of the false twist unit.
  • a suction system (not shown) is connected to this suction hole, with which one of the suction systems is sucked in by the false twist element , additional air volume is sucked in through the intake duct 115A.
  • This additional amount of air serves to increase the air speed in the intake duct, so that the spiral shape shaped path in which the front ends of the fibers F R andfa- be promoted, receives a greater slope.
  • This larger slope respectively higher suction speed, rather ensures that the front fiber ends mentioned are better aligned and are not detected too early, but as close as possible to the narrowest point of the suction duct 115A mentioned.
  • This suction also reduces possible edge fiber loss between the pair of output rollers 105 and the inlet of the intake duct.
  • FIG. 5 shows, with the intake duct 115B, an additional variant of the intake duct in this latter endeavor of the fiber end guide.
  • This intake duct 115B is designed in a bell-shaped manner such that the tendency that the fiber ends mentioned are caught too early by the rotating fiber core 119 can be additionally counteracted.
  • the front ends of the marginal fibers F are fed to the suction channel 115C in the upper region E, and are guided in the central region M in such a way that they are as narrow as possible for as long as possible without being caught by the rotating fiber core 119 of the intake duct 115C and are guided in the lower region U into a position in which the ends of the edge fibers F are more likely to assume a position parallel to the yarn core. In this latter position, the ends of the edge fibers F can be better grasped by the fiber ends (not shown) projecting from the rotating yarn core than in a position perpendicular to the fiber core.
  • the intake duct is not limited to the shapes shown in Figs. 4-5a. Variations of this can be optimized through trials.
  • the suction bore 125 can open tangentially into the intermediate space 124 in such a way that the aforementioned rotation of the intake air is supported.
  • Diameter 0 values of less than 2.5 mm require higher negative pressures (higher output) for the same air flow rate (liters / min.) And, depending on the value, result in such an increased air speed that free front fiber ends may not be able to rotate from the rotating yarn core , but are detected by the suction air, so that the corresponding edge fiber F is fed as an outlet to the suction system.
  • the influence of the bandwidth B1 on the yarn values shown with FIGS. 10 and 11 relates to the aforementioned stretch of 3000 tex and to the yarn of 16 tex, spun with a false twist unit according to FIG. 4.
  • a broad fiber distribution between the aprons also has the advantage of better fiber distribution in this warping zone which performs the main warping. This better fiber distribution results in a more even warping in this zone and a longer apron life.
  • the optimal bandwidth Bl must be determined from case to case. For example, with the false twist spinning unit according to FIG. 4 it was found that an optimal width B1 for a yarn of 8 tex is between 10 and 12 mm and for a yarn of 30 tex between 15 and 19 mm.
  • a loop characterized by the angle ⁇ (FIG. 2), supports one of the two output rollers by the fiber sliver to separate the edge fibers from the spinning triangle.
  • This looping can be achieved either by, as shown in FIG. 2, the false twist spinning unit 106 with the angle A deviating from an imaginary plane tangential to the clamping line K, or by the false twist spinning unit as shown in FIG 106 is arranged offset parallel to the plane mentioned.
  • the offset (Fig. 12) - st measured in millimeters.
  • FIGS. 13a-d The abscissa of FIG. 13d also applies to FIGS. 13a-c and shows values for the distance D in percentages above and below the optimal distance of 70% of the average fiber length.
  • the ordinates of FIGS. 13a-d show the CV-Uster value, the number of nits per 1000 m with a setting level 3, the travel kilometers Rkm (CN / Tex) and the departure in percent. These values are internationally standardized measurement methods.
  • the diagrams show that as the distance decreases, the CV-Uster value, the number of nits and the drop in the area shown are reduced in an essentially linear function, while the distance traveled Rkm before and after the optimal distance D is reduced.
  • the false twist element need not be pneumatic, as shown in FIGS. 2-5a, but it is quite possible that following the intake duct 115A or. 115B, resp. 115C, a purely mechanical false twist device (not shown) is used.
  • a purely mechanical false twist device (not shown) is used.
  • the essential inventive concept of the relation of the width B1 to the length D is also in use of a purely mechanical false twist device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Artificial Filaments (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
EP84106801A 1983-07-01 1984-06-15 Procédé et dispositif de filature par fausse-torsion Expired EP0131170B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84106801T ATE36357T1 (de) 1983-07-01 1984-06-15 Verfahren und vorrichtung zum falschdrallspinnen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3633/83 1983-07-01
CH363383 1983-07-01

Publications (2)

Publication Number Publication Date
EP0131170A1 true EP0131170A1 (fr) 1985-01-16
EP0131170B1 EP0131170B1 (fr) 1988-08-10

Family

ID=4260172

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84106801A Expired EP0131170B1 (fr) 1983-07-01 1984-06-15 Procédé et dispositif de filature par fausse-torsion

Country Status (11)

Country Link
US (1) US4565063A (fr)
EP (1) EP0131170B1 (fr)
JP (1) JPH0621381B2 (fr)
AT (1) ATE36357T1 (fr)
AU (1) AU561785B2 (fr)
BR (1) BR8403246A (fr)
CS (1) CS498384A3 (fr)
DE (1) DE3473307D1 (fr)
ES (1) ES8601343A1 (fr)
IE (1) IE55274B1 (fr)
IN (1) IN161355B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0222981A1 (fr) * 1985-11-21 1987-05-27 Schubert & Salzer Maschinenfabrik Aktiengesellschaft Procédé et dispositif pour la filature des fibres
US4823545A (en) * 1987-08-31 1989-04-25 Maschinenfabrik Rieter Ag Method of and apparatus for false-twist spinning
EP0368108A1 (fr) * 1988-11-07 1990-05-16 Maschinenfabrik Rieter Ag Dispositif de fausse torsion pour un métier à filer à jet d'air
US4934133A (en) * 1987-12-18 1990-06-19 Maschinenfabrick Rieter Ag Method of producing a rotating air layer and false-twist air jet nozzle for practicing such method
EP0415295A1 (fr) * 1989-09-01 1991-03-06 Maschinenfabrik Rieter Ag Procédé de filage à fausse torsion et dispositif pour la mise en oeuvre de ce procédé
US5237810A (en) * 1989-09-01 1993-08-24 Maschinenfabrik Rieter Ag Method and apparatus for false twist spinning
US5689945A (en) * 1991-11-21 1997-11-25 Maschinenfabrik Rieter Ag Drawing unit for a fine-spinning machine, in particular a jet-spinning machine

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6215331A (ja) * 1985-06-27 1987-01-23 Murata Mach Ltd 空気式紡績機
IN171021B (fr) * 1987-04-27 1992-07-04 Rieter Ag Maschf
EP0361257A1 (fr) * 1988-09-29 1990-04-04 Maschinenfabrik Rieter Ag Rouleaux d'alimentation dans un train d'étirage
CH684515B5 (de) * 1988-10-26 1995-04-13 Murata Machinery Ltd Verfahren zur Herstellung eines mehrlagigen Spinngarns und eines flauschigen Spinngarns.
DE3939777A1 (de) * 1989-12-01 1991-06-06 Fritz Stahlecker Vorrichtung zum falschdrallspinnen
DK166797B1 (da) * 1990-05-21 1993-07-19 Milliken Denmark Vaskbar vand- og snavsbindende renholdelsesmaatte
US6449938B1 (en) 2000-05-24 2002-09-17 Goulston Technologies, Inc. Advanced finish nozzle system
RU2475741C1 (ru) * 2011-11-02 2013-02-20 Государственное бюджетное образовательное учреждение высшего профессионального образования "Астраханская государственная медицинская академия" Министерства здравоохранения и социального развития Российской Федерации (ГБОУ ВПО АГМА Минздравсоцразвития России) СПОСОБ ПОДГОТОВКИ БИОЛОГИЧЕСКОГО МАТЕРИАЛА ДЛЯ ВЫДЕЛЕНИЯ ДНК Coxiella burnetii
CH707076A1 (de) * 2012-10-12 2014-04-15 Rieter Ag Maschf Streckwerk mit Abschirmelementen.
CN107532346B (zh) 2015-04-08 2020-08-07 肖氏工业集团公司 纱线变形装置和方法
JP6867699B2 (ja) * 2018-11-19 2021-05-12 株式会社近藤紡績所 編地製造方法、生地製造方法、及び縫製品製造方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2416880A1 (de) * 1973-04-10 1974-10-24 Toray Industries Spiralfoermig umhuelltes garn, verfahren und vorrichtung zu dessen herstellung
CH572113A5 (en) * 1974-03-23 1976-01-30 Toray Industries Spirally sheathed yarn of stable fibres without twist - core not fully covered, enclosed by uniformly spaced spirals(BR-23.12.75)
CH615467A5 (en) * 1977-05-17 1980-01-31 Toyo Boseki Process and apparatus for the purely mechanical production of a staple-fibre yarn consisting of natural or synthetic fibres
EP0068507A2 (fr) * 1981-06-30 1983-01-05 Toray Industries, Inc. Machine à fabriquer un filé fascié
EP0069400A2 (fr) * 1981-07-08 1983-01-12 Toray Industries, Inc. Procédé de fabrication d'un filé fascié

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3487619A (en) * 1966-09-02 1970-01-06 Du Pont Apparatus for high speed drafting
US4003194A (en) * 1973-04-10 1977-01-18 Toray Industries, Inc. Method and apparatus for producing helically wrapped yarn
US4387487A (en) * 1979-10-16 1983-06-14 Murata Kikai Kabushiki Kaisha High draft apparatus in spinning machine
JPS5860029A (ja) * 1981-10-07 1983-04-09 Toyoda Autom Loom Works Ltd 仮撚空気ノズル
JPS5932606Y2 (ja) * 1981-10-13 1984-09-12 村田機械株式会社 空気式紡績装置における空気ノズル先端部の空気の整流板

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2416880A1 (de) * 1973-04-10 1974-10-24 Toray Industries Spiralfoermig umhuelltes garn, verfahren und vorrichtung zu dessen herstellung
CH572113A5 (en) * 1974-03-23 1976-01-30 Toray Industries Spirally sheathed yarn of stable fibres without twist - core not fully covered, enclosed by uniformly spaced spirals(BR-23.12.75)
CH615467A5 (en) * 1977-05-17 1980-01-31 Toyo Boseki Process and apparatus for the purely mechanical production of a staple-fibre yarn consisting of natural or synthetic fibres
EP0068507A2 (fr) * 1981-06-30 1983-01-05 Toray Industries, Inc. Machine à fabriquer un filé fascié
EP0069400A2 (fr) * 1981-07-08 1983-01-12 Toray Industries, Inc. Procédé de fabrication d'un filé fascié

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0222981A1 (fr) * 1985-11-21 1987-05-27 Schubert & Salzer Maschinenfabrik Aktiengesellschaft Procédé et dispositif pour la filature des fibres
WO1987003308A1 (fr) * 1985-11-21 1987-06-04 Schubert & Salzer Maschinenfabrik Aktiengesellscha Procede et dispositif de filage de fibres
US4823545A (en) * 1987-08-31 1989-04-25 Maschinenfabrik Rieter Ag Method of and apparatus for false-twist spinning
US4934133A (en) * 1987-12-18 1990-06-19 Maschinenfabrick Rieter Ag Method of producing a rotating air layer and false-twist air jet nozzle for practicing such method
EP0368108A1 (fr) * 1988-11-07 1990-05-16 Maschinenfabrik Rieter Ag Dispositif de fausse torsion pour un métier à filer à jet d'air
EP0415295A1 (fr) * 1989-09-01 1991-03-06 Maschinenfabrik Rieter Ag Procédé de filage à fausse torsion et dispositif pour la mise en oeuvre de ce procédé
US5237810A (en) * 1989-09-01 1993-08-24 Maschinenfabrik Rieter Ag Method and apparatus for false twist spinning
US5689945A (en) * 1991-11-21 1997-11-25 Maschinenfabrik Rieter Ag Drawing unit for a fine-spinning machine, in particular a jet-spinning machine

Also Published As

Publication number Publication date
JPH0621381B2 (ja) 1994-03-23
DE3473307D1 (en) 1988-09-15
ES534148A0 (es) 1985-10-16
AU2971984A (en) 1985-01-03
IN161355B (fr) 1987-11-14
ES8601343A1 (es) 1985-10-16
BR8403246A (pt) 1985-06-11
JPS6065123A (ja) 1985-04-13
US4565063A (en) 1986-01-21
AU561785B2 (en) 1987-05-14
IE55274B1 (en) 1990-07-18
ATE36357T1 (de) 1988-08-15
EP0131170B1 (fr) 1988-08-10
IE841469L (en) 1985-01-01
CS498384A3 (en) 1992-05-13

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