EP0131170B1 - Verfahren und Vorrichtung zum Falschdrallspinnen - Google Patents
Verfahren und Vorrichtung zum Falschdrallspinnen Download PDFInfo
- Publication number
- EP0131170B1 EP0131170B1 EP84106801A EP84106801A EP0131170B1 EP 0131170 B1 EP0131170 B1 EP 0131170B1 EP 84106801 A EP84106801 A EP 84106801A EP 84106801 A EP84106801 A EP 84106801A EP 0131170 B1 EP0131170 B1 EP 0131170B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- suction
- yarn core
- false twist
- width
- fibre
- 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
Links
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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 invention relates to a method for false twist spinning with the method steps that a sliver is drawn in a drafting system to a desired yarn number, the spread sliver in the converging space of the output roller pair being limited to a width by suitable means that the sliver in such a Width is output from the pair of output rollers that only a portion of the original width of the drawn fiber sliver is gripped by the spinning triangle and turned to an incorrectly twisted yarn core, and that the edge fibers resulting from the difference in width to the smaller width of the spinning triangle are sucked into a tapered suction channel and at the latest at the narrowest point of the intake duct, d. H.
- the problems of the yarns produced by means of the false twist spinning process with regard to the 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 neps 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 CR-A-615 467.
- a delivered sliver 2 is calibrated in a drafting device 1 by a hopper 5 or 6 provided in front of a pair of input rollers 3 and in front of an intermediate roller 4 and guided by 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).
- a further funnel 9 is provided for collecting the edge fibers F or to avoid as far as possible that these edge fibers are lost.
- 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 caught 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 with regard to 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, and that the edge fibers mentioned are wound around the yarn core without pretensioning.
- the object is achieved in that the edge fibers not covered by the spinning triangle 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 is seen from the rotating yarn core, as seen in the direction of conveyance of the yarn core is detected when the rear end of the fiber is still clamped in the nip line of the pair of output rollers, and that the rear end of the fiber leaves the nip line only when the fiber has been caught by the spinning triangle, whereby the rear end of the fiber is bound in the yarn core .
- a device for carrying out this method is characterized in that one of the two aprons protrudes further into the converging space than the other apron and both aprons are guided so close to the corresponding roller of the output rollers that the distances between the aprons and the corresponding rollers are almost zero.
- the distance between the clamping line of the pair of output rollers and the narrowest point of the intake duct is 60 to 75% and preferably 68 to 72% of the average fiber length.
- the invention achieves a more uniform yarn with high strength.
- a sliver 102 is drawn to a finished yarn size in a preliminary drafting field between an input roller pair 103 and an intermediate roller pair 104 and in a main drafting field between the intermediate roller pair 104 and an output roller pair 105 and shown in a false twist spinning unit 106 (shown in section ) turned into a yarn 107.
- the drafting system further comprises a condenser 108 in front of the input roller pair 103 as a first sliver guiding element, a condenser 109 in front of the intermediate roller pair 104 as a second sliver guiding element and a pair of straps 110 consisting of an upper apron 111 and a lower apron 112 as an additional sliver guiding element.
- 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 clear width of these condensers is such that the sliver has a width B1 of 10 19 mm between the straps, preferably 14 for a yarn titer of approx. 15 tex - 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 strap pair 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 pushed into the converging space 113 also results in an 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 Specification 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 substantially smaller than the previously mentioned fiber bandwidth 81, ie the width B1 becomes at Resulting width B2 selected depending on the processed average fiber length and spun yarn titer such that there is a sufficient number of edge fibers F for the winding around the yarn core 119.
- this edge fiber causes the yarn core 119 to be wound in the same direction of rotation, ie at S-twist of the yarn core 119, also S-twist of the wrapping fiber, but with a much larger pitch with the angle y.
- the angle becomes somewhat larger towards the spinning triangle and can correspond to the angle ⁇ shortly before the spinning triangle.
- This larger incline is caused by walking the winding at a higher speed than the advance of the yarn core in the direction opposite to the yarn advance, i.e. towards the spinning triangle, and ensures that, provided that the rear fiber end is still gripped by the clamping line K, this end is screwed into the spinning triangle, so that this is subsequently the rear fiber end released by the clamping line K remains contained 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 smaller than the length of the edge fiber F. A too early twisting of the said front fiber end can result in the wrapping length of the edge fiber 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. of the whole width B1 are distributed outside and between the 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.
- 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 which is passed on from a pair of take-off rolls (not shown) provided after the false twist unit to a spool unit (not shown), consists of an essentially untwisted yarn core 120 (FIG. 9), which is held together by surrounding fibers F, now called winding fibers F1 becomes.
- the slope A A (FIG. 9) of these wrapping fibers F1 essentially corresponds to the slope difference A (FIG. 7), which results from the difference between the slope ( ⁇ ) of the yarn core 119 and the slope (y) 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 condensers 108, 109, also provides a sufficient and secure number of edge fibers F which are essentially constant over time can be provided 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 space between them suction bore 125 connecting to the surroundings of the false twist unit.
- a suction system (not shown) is connected to this suction bore, with which an additional amount of air is sucked in through suction channel 115A in addition to the false twist element.
- This additional amount of air serves to increase the air speed in the intake duct, so that the spiral path in which the front ends of the edge fibers F are conveyed has a greater gradient.
- This greater incline, 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 suction channel 115B is designed in a bell-shaped manner in such a way 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 edge fibers F are fed to the suction duct 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 an equal 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 band of 3000 tex and to the yarn of 16 tex, spun with a false twist unit according to FIG. 4.
- Rkm 10 shows the ordinate for the strength values in kilometers of travel (Rkm) and the abscissa for the bandwidth B1. It can be seen that the Rkm value begins to stabilize from a width of 14 mm B1.
- a broad fiber distribution between the aprons also has the advantage of better fiber distribution in this drafting zone which carries out the main draft. This better fiber distribution results in a more even warping in this zone and a longer apron life.
- the optimal bandwidth B1 must be determined on a case-by-case basis. 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 marked with 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 wrapping can be achieved either by, as shown in FIG. 2, the false twist spinning unit 106 with the angle ⁇ 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) is 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 travel kilometer value Rkm is reduced before and after the optimal distance D.
- the false twist element does not need to 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 can also be realized in the 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)
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 |
---|---|---|---|
CH363383 | 1983-07-01 | ||
CH3633/83 | 1983-07-01 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0131170A1 EP0131170A1 (de) | 1985-01-16 |
EP0131170B1 true EP0131170B1 (de) | 1988-08-10 |
Family
ID=4260172
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84106801A Expired EP0131170B1 (de) | 1983-07-01 | 1984-06-15 | Verfahren und Vorrichtung zum Falschdrallspinnen |
Country Status (11)
Country | Link |
---|---|
US (1) | US4565063A (ja) |
EP (1) | EP0131170B1 (ja) |
JP (1) | JPH0621381B2 (ja) |
AT (1) | ATE36357T1 (ja) |
AU (1) | AU561785B2 (ja) |
BR (1) | BR8403246A (ja) |
CS (1) | CS498384A3 (ja) |
DE (1) | DE3473307D1 (ja) |
ES (1) | ES534148A0 (ja) |
IE (1) | IE55274B1 (ja) |
IN (1) | IN161355B (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
Families Citing this family (17)
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 |
DE3541219A1 (de) * | 1985-11-21 | 1987-05-27 | Schubert & Salzer Maschinen | Verfahren und vorrichtung zum verspinnen von fasern |
IN171021B (ja) * | 1987-04-27 | 1992-07-04 | Rieter Ag Maschf | |
US4823545A (en) * | 1987-08-31 | 1989-04-25 | Maschinenfabrik Rieter Ag | Method of and apparatus for false-twist spinning |
JPH01162829A (ja) * | 1987-12-18 | 1989-06-27 | Mas Fab Rieter Ag | 空気ジェットノズル及び該ノズルの加撚部分で回転空気層を形成する方法 |
EP0361257A1 (de) * | 1988-09-29 | 1990-04-04 | Maschinenfabrik Rieter Ag | Lieferwalzen eines Streckwerkes |
CH684515B5 (de) * | 1988-10-26 | 1995-04-13 | Murata Machinery Ltd | Verfahren zur Herstellung eines mehrlagigen Spinngarns und eines flauschigen Spinngarns. |
CH676725A5 (ja) * | 1988-11-07 | 1991-02-28 | Rieter Ag Maschf | |
US5237810A (en) * | 1989-09-01 | 1993-08-24 | Maschinenfabrik Rieter Ag | Method and apparatus for false twist spinning |
EP0415295B1 (de) * | 1989-09-01 | 1995-04-19 | Maschinenfabrik Rieter Ag | Verfahren zum Falschdrahtspinnen und Vorrichtung zur Durchführung des Verfahrens |
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 |
CH685123A5 (de) * | 1991-11-21 | 1995-03-31 | Rieter Ag Maschf | Streckwerk für eine Feinspinnmaschine, insbesondere Düsenspinnmaschine. |
US6449938B1 (en) | 2000-05-24 | 2002-09-17 | Goulston Technologies, Inc. | Advanced finish nozzle system |
CH707076A1 (de) * | 2012-10-12 | 2014-04-15 | Rieter Ag Maschf | Streckwerk mit Abschirmelementen. |
WO2016164777A1 (en) * | 2015-04-08 | 2016-10-13 | Shaw Industries Group, Inc. | Yarn texturizing apparatus and method |
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 |
Family Cites Families (10)
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 |
JPS5243256B2 (ja) * | 1973-04-10 | 1977-10-29 | ||
AU499131B2 (en) * | 1974-03-23 | 1979-04-05 | Toray Industries, Inc. | Gore yarn |
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 |
US4387487A (en) * | 1979-10-16 | 1983-06-14 | Murata Kikai Kabushiki Kaisha | High draft apparatus in spinning machine |
US4463549A (en) * | 1981-06-30 | 1984-08-07 | Toray Industries, Inc. | Apparatus for making fasciated spun yarn |
JPS588133A (ja) * | 1981-07-08 | 1983-01-18 | Toray Ind Inc | 結束紡績糸の製造方法 |
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 |
-
1984
- 1984-05-25 IN IN387/MAS/84A patent/IN161355B/en unknown
- 1984-06-12 IE IE1469/84A patent/IE55274B1/en not_active IP Right Cessation
- 1984-06-15 EP EP84106801A patent/EP0131170B1/de not_active Expired
- 1984-06-15 AT AT84106801T patent/ATE36357T1/de not_active IP Right Cessation
- 1984-06-15 DE DE8484106801T patent/DE3473307D1/de not_active Expired
- 1984-06-18 JP JP59123876A patent/JPH0621381B2/ja not_active Expired - Fee Related
- 1984-06-21 AU AU29719/84A patent/AU561785B2/en not_active Ceased
- 1984-06-25 US US06/624,224 patent/US4565063A/en not_active Expired - Lifetime
- 1984-06-28 CS CS844983A patent/CS498384A3/cs unknown
- 1984-06-29 BR BR8403246A patent/BR8403246A/pt not_active IP Right Cessation
- 1984-06-29 ES ES534148A patent/ES534148A0/es active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
Also Published As
Publication number | Publication date |
---|---|
DE3473307D1 (en) | 1988-09-15 |
IE841469L (en) | 1985-01-01 |
ATE36357T1 (de) | 1988-08-15 |
US4565063A (en) | 1986-01-21 |
ES8601343A1 (es) | 1985-10-16 |
JPS6065123A (ja) | 1985-04-13 |
AU2971984A (en) | 1985-01-03 |
IN161355B (ja) | 1987-11-14 |
EP0131170A1 (de) | 1985-01-16 |
IE55274B1 (en) | 1990-07-18 |
CS498384A3 (en) | 1992-05-13 |
BR8403246A (pt) | 1985-06-11 |
ES534148A0 (es) | 1985-10-16 |
JPH0621381B2 (ja) | 1994-03-23 |
AU561785B2 (en) | 1987-05-14 |
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