WO1997032064A1 - Reducing end breaks in the spinning or twisting of yarn - Google Patents
Reducing end breaks in the spinning or twisting of yarn Download PDFInfo
- Publication number
- WO1997032064A1 WO1997032064A1 PCT/AU1997/000118 AU9700118W WO9732064A1 WO 1997032064 A1 WO1997032064 A1 WO 1997032064A1 AU 9700118 W AU9700118 W AU 9700118W WO 9732064 A1 WO9732064 A1 WO 9732064A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- yarn
- nip
- belt means
- yam
- twist
- Prior art date
Links
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
- D01H1/02—Spinning or twisting machines in which the product is wound-up continuously ring type
-
- 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
- D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
- D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
- D02G1/04—Devices for imparting false twist
- D02G1/08—Rollers or other friction causing elements
- D02G1/085—Rollers or other friction causing elements between crossed belts
-
- 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
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H7/00—Spinning or twisting arrangements
- D01H7/92—Spinning or twisting arrangements for imparting transient twist, i.e. false twist
Definitions
- This invention relates generally to the spinning or twisting of yarn and in a particular though not exclusive application addresses the problem of end breaks in ring spinning.
- Past proposals for reducing the incidence of end breaks have therefore focused on increasing twist levels above the yarn guide or on reducing the transmission of tension towards the front drafting rollers, with the broad object of improving the twist-tension balance in the spinning zone.
- One approach, for which there have been a number of proposals, was a rotating yarn guide for inserting false twist into the yarn in the spinning zone between the guide and the front drafting rollers, thus increasing the twist level in the zone.
- the yarn guide comprises a friction tube driven by a magnetic coupling with the spindle.
- the tube is rotated by the yarn itself. In other cases, a separate mechanical drive is provided.
- US Patent 4384448 to Wilkie proposes a pneumatic false twister between the guide and the front drafting rollers.
- Various further forms of mechanical false twisters at this location are found in related disclosures by H.M. Brown, i.e. US patents 2590374 and 27181 11 , a report entitled “Clemson Dean proposes New Technique", at Textile Bulletin, 1949, and a paper entitled “Reduce Ends Down” in Textile Industries, May 1954, page 96.
- These false twisters are primarily discs in various orientations and configurations, but US patent 2590374 includes an embodiment ( Figures 7 and 8) which utilises a transversely acting belt run close to and just above the guide.
- spindle crowns Another approach, with the object of reducing spinning tension, has been to provide modifications at the spindle top, known as spindle crowns. This approach is reviewed in Schenkel et al, Textile-Praxis (International), page 150 (1963), and generally involves partial or complete collapse of the balloon by a yarn wrap device. Spindle crowns have not achieved significant commercial use, perhaps again because of issues of cost and complexity.
- the invention stems from an appreciation that the aforementioned transversely acting belt disclosed in Figures 7 and 8 of US patent 2590374 has potential utility as a false-twister in the present context but that a further modification would be advantageous.
- the angular contact depicted in the patent between the yarn and the belt surface is very small, reflecting the small angular deviation of the yarn path by the belt.
- the present invention proposes, in one aspect, that reduction of end breaks is enhanced by not merely inserting false twist into the spinning zone but additionally materially reducing the propagation of tension into the spinning zone, and that this can be achieved by taking advantage of Capstan Theory and Amontons' law, predicting that the higher the angular contact, the less tension is propagated.
- the invention avoids this restriction, and balances sideways drag, by arranging for the yarn to engage both runs of a continuous belt means.
- the invention therefore provides, in a first aspect, a method of twisting a travelling fibre assembly to form a twisted yarn, in which the strand is drawn from nip means and rotated to insert twist into the yarn, wherein, downstream of the nip, the twisted yarn is drawn past and in engagement with at least one run of travelling continuous belt means so that a surface or surfaces of the belt means rotates the yarn and inserts a false twist into the yarn towards the nip, wherein said surface(s) is convexedly curved in the direction of travel of the yarn, and the yarn engages said surface(s) over a total curved line contact which is sufficient to materially reduce the transmission of tension in the yarn past the surface(s) towards the nip.
- the invention also provides an apparatus for twisting a travelling fibre assembly to form a twisted yarn, including: delivery means including an exit nip; twisting means rotatable to draw the fibre assembly from the nip while inserting twist into the fibre assembly to form a twisted yarn; and belt means which in use is a travelling continuous belt means, disposed to define a pair of runs at least one of which is engaged by the twisted yam as it is drawn past so that a surface or surface(s) of belt means rotates the yarn and inserts false twist into the yarn towards the nip; wherein said surface(s) is convexedly curved in the direction of ya travel and the belt means is arranged so that, in operation of the apparatus, the yarn engages said surface(s) over a total curved line contact which is sufficient to materially reduce the transmission of tension in the yarn past the surface(s) towards the nip.
- a method of twisting a travelling fibre assembly to form a twisted yam in which the strand is drawn from nip means and rotated to insert twist into yarn, wherein, downstream of the nip, the twisted yam is drawn past and in engagement with two oppositely moving runs of travelling continuous belt means so that a surface or surfaces of the belt means rotates the yarn and inserts a false twist into the ya towards the nip, the sideways drag of the respective runs on the yarn being substantially counterbalanced.
- the invention also provides, in its second aspect, an apparatus for twisting a travelling fibre assembly to form a twisted yarn, including: delivery means including an exit nip; twisting means rotatable to draw the fibre assembly from the nip while inserting twist into the fibre assembly to form the twisted yarn; and belt means which in use is a travelling continuous belt means, disposed to define a pair of runs both of which are engaged by the twisted yarn as it is drawn past so that a surface or surfaces of the belt means rotates the yarn and inserts false twist into the yarn towards the nip, the sideways drag of respective runs on the yarn in operation being substantially counter-balanced.
- the twisted yarn is preferably drawn past and engages two runs of the belt means travelling in opposite directions, passing behind one of said runs and in front of the other run.
- the apparatus is preferably spinning apparatus in which the delivery means includes drafting means and the twisting means is a spindle which takes up the yarn and is rotatable to insert twist into the yarn.
- the continuous belt means is arranged so that the or each engaged run travels transversely with respect to the direction in which the yarn is being drawn by the spindle, for example at substantially 90° to that direction.
- the fibre assembly is preferably a staple fibre assembly, and is advantageously a wool roving/strand in particular.
- the spinning apparatus would include a yarn guide such as a pigtail between the spindle and the nip, and a ring and traveller system to take up the yarn on the spindle.
- a yarn guide such as a pigtail between the spindle and the nip
- a ring and traveller system to take up the yarn on the spindle.
- the continuous belt means is preferably disposed between the yarn guide and the nip.
- a single travelling belt is disposed to engage a plurality of yams.
- Means is preferably provided to allow adjustment of the characteristics of travel of the belt means and/or its orientation and contact with the yarn(s).
- Figure 1 is a diagrammatic perspective view of a single spindle segment of a ring spinning frame modified to provide an embodiment of apparatus according to the invention and shown in operation;
- Figure 2 is a corresponding diagrammatic cross-sectional view
- Figure 3 is a reference diagram for applying Amontons' law.
- the illustrated spinning segment includes a delivery or drafting section 12 of conventional configuration including a double apron 1 1 and front drafting rollers 13 defining an exit nip 14.
- Take up spindle 16 has a ring 19 and traveller 18.
- a pigtail yarn guide 20 is located as usual between the nip and the spindle.
- a roving 7 is drafted by drafting section 12 and the rotating spindle draws the drafted strand 8 from nip 14 and winds it up as yam 9 onto spindle 16, while inserting twist into the yam by virtue of its rotation. This twist travels back to nip 14 at a diminishing and locally fluctuating level.
- tension in the yarn increased by the centrifugally generated yam balloon 9 between ring 19 and pigtail yarn guide 20.
- This unit includes a continuous belt 30 of a generally circular cross section and a suitable elastomeric material exhibiting appropriate surface friction.
- Belt 30 is mounted about respective drive and idler pulleys 32, 33 defining an orientation plane which obliquely intersects the direct yam travel path from the nip 14 of front drafting rollers 15 to yam guide 20 so that the upper run 34 of belt 30 is disposed forward of the direct line of yarn travel and the lower run 35 is rearward of this line.
- the modified spinning section is threaded up so that the yarn is drawn around the front of upper belt run 34 and behind lower belt run 35, thus effecting two curved lines of contact with the belt. If the spindle and belt are now set in motion (by mechanical drives not detailed), the surfaces of the respective belt runs engaged by the travelling yam travel transversely, indeed at 90° to, the yarn and thereby rotate the yarn to insert false twist into the yarn towards nip 14.
- the twist inserted by the two belt runs is cumulative above the upper run 34. This increases the twist level in the yarn in the spinning zone 31 above belt 30 without having any substantial effect on the average twist level of the yam wound onto the spindle.
- the line contact of each belt run with the yam is effective to reduce transmission of tension into the spinning zone. The increased twist level and the reduced tension both contribute to a substantial reduction in the relative incidence of end breaks in the spinning zone 31 above the belt.
- the measured yarn tension was respectively about 9cN, lOcN and 3cN.
- the tension reduction is also dependent on ⁇ and therefore on yarn and belt materials.
- twist belt unit 25 is sufficiently set back not to significantly interfere with doffing.
- false twist belt unit 25 might incorporate a number of optional or advantageous features. For example, provision may be made to vary the speed of travel of belt 30 or to render its operation intermittent, eg on-off or forward-reverse, to obtain particular spinning effects.
- the angle of the plane of belt 30 to the direct line of travel between the front drafting rollers and the yarn guide may be adjustable to control the angle of contact of the belt with the yarn and therefore to control the transmission of tension in the yarn. Adjustment of tension can be used, for example, to compensate for tension changes during the cycle of building a yarn package from the spindle. The balance between tension reduction and twist level increase can also be controlled by varying the cross- sectional diameter or surface friction of belt 30.
- the spacing between the belt runs can be made adjustable, eg by means of adjustable idlers.
- the false twist belt may be employed to effect yarn surface treatment, eg through the addition of wax, moisture, lubricant or tint.
- Reversing the direction of the belt can be effective, if desired for particular purposes, to decrease both twist and tension in the upstream yarn.
- a further effective modification is to orient the yarn path so as to be tangential to, or at least nearer to tangential to, the nip at the front drafting rollers, thereby allowing twist to propagate further up the yarn and reducing the incidence of breakage adjacent the nip.
- the modification of the path is facilitated by the unit 25 : it can be seen in Figure 1 that the yam is lifted nearer to the tangential position. A position still nearer to tangential can be achieved by further adjusting the location and configuration of unit 25.
- the invention has broad application to both short and long staple ring spinning of singles yarns in worsted spinning, or more generally to woollen or semi-worsted spinning, to two-folding in general and to short and long staple Sirospun (trade mark) processes in particular, and to simple ring twisting operations.
- the capacity provided by the invention to reduce the relative incidence of end breaks allows higher spindle speeds for a given yarn break rate, or allows yarns to be spun at lower twist at a given yarn break rate.
- yam break rates can be reduced for a given yarn count and twist level.
- the invention permits lower quality fibrous material to be spun at a given yarn count, spindle speed and twist level, and allows yarns with fewer fibres in the cross section to be successfully spun into an acceptable yarn product.
Landscapes
- 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)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR9707790A BR9707790A (en) | 1996-02-29 | 1997-02-28 | Process and apparatus for twisting a set of fibers in motion |
EP97904925A EP0883702A4 (en) | 1996-02-29 | 1997-02-28 | Reducing end breaks in the spinning or twisting of yarn |
PL97328866A PL328866A1 (en) | 1996-02-29 | 1997-02-28 | Reduction of broken ends occurrence in yarn spinning of twisting processes |
JP53046897A JP2001508133A (en) | 1996-02-29 | 1997-02-28 | Means for reducing end cutting in spinning or twisting of yarn |
AU18615/97A AU721962B2 (en) | 1996-02-29 | 1997-02-28 | Reducing end breaks in the spinning or twisting of yarn |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPN8384 | 1996-02-29 | ||
AUPN8384A AUPN838496A0 (en) | 1996-02-29 | 1996-02-29 | Reducing end breaks in the spinning or twisting of yarn |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997032064A1 true WO1997032064A1 (en) | 1997-09-04 |
Family
ID=3792697
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU1997/000118 WO1997032064A1 (en) | 1996-02-29 | 1997-02-28 | Reducing end breaks in the spinning or twisting of yarn |
Country Status (10)
Country | Link |
---|---|
EP (1) | EP0883702A4 (en) |
JP (1) | JP2001508133A (en) |
KR (1) | KR19990087402A (en) |
CN (1) | CN1212737A (en) |
AU (1) | AUPN838496A0 (en) |
BR (1) | BR9707790A (en) |
CA (1) | CA2247242A1 (en) |
PL (1) | PL328866A1 (en) |
TR (1) | TR199801684T2 (en) |
WO (1) | WO1997032064A1 (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2176453A1 (en) * | 2007-07-02 | 2010-04-21 | The Hong Kong Polytechnic University | Method of industrially producing a yarn and the textile product thereof, and a ring spinning machine that carries the method |
US8544252B2 (en) | 2008-08-04 | 2013-10-01 | The Hong Kong Polytechnic University | Method and apparatus for reducing residual torque and neps in singles ring yarns |
WO2013143455A1 (en) * | 2012-03-27 | 2013-10-03 | The Hong Kong Polytechnic University | Method and apparatus for imparting false twist to yarn before ring spinning |
DE102013108096A1 (en) * | 2013-07-29 | 2015-01-29 | Maschinenfabrik Rieter Ag | Spinning machine and false twisting device |
DE102013108095A1 (en) * | 2013-07-29 | 2015-01-29 | Maschinenfabrik Rieter Ag | Spinning machine and false twisting device |
DE102013108094A1 (en) * | 2013-07-29 | 2015-01-29 | Maschinenfabrik Rieter Ag | Spinning machine and false twisting device |
DE102013113290A1 (en) * | 2013-12-02 | 2015-06-03 | Maschinenfabrik Rieter Ag | Spinning machine, false twisting device and catch hook |
DE102014105821A1 (en) * | 2014-04-25 | 2015-10-29 | Maschinenfabrik Rieter Ag | Spinning machine, false twisting device and catching device |
DE102014107137A1 (en) * | 2014-05-21 | 2015-11-26 | Maschinenfabrik Rieter Ag | spinning machine |
DE102014108194A1 (en) * | 2014-06-11 | 2015-12-17 | Maschinenfabrik Rieter Ag | Spinning machine and false twisting device |
DE102016105718A1 (en) * | 2016-03-29 | 2017-10-05 | Maschinenfabrik Rieter Ag | Belt for use in a false twisting device of a spinning machine |
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CN102296390A (en) * | 2010-06-26 | 2011-12-28 | 宁波德昌精密纺织机械有限公司 | Spinning device for producing low-torque yarns |
CN101892533B (en) * | 2010-07-27 | 2012-07-04 | 上海市毛麻纺织科学技术研究所 | High-tenacity and low-tension spinning device |
CN102011219A (en) * | 2010-09-21 | 2011-04-13 | 江南大学 | Device for changing form of ring spinning twisting triangular space |
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CN104278369B (en) * | 2013-07-10 | 2016-09-07 | 江南大学 | Single ingot disc type RING SPINNING false-twisting device and process |
CN104195698B (en) * | 2014-07-14 | 2017-02-22 | 西安工程大学 | Ring spindle composite spinning device and spinning method |
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CN110644082B (en) * | 2019-09-01 | 2021-06-04 | 嘉兴学院 | Method and device for controlling broken end breakpoint of false twist compact spinning |
CN112695424B (en) * | 2019-10-22 | 2022-07-26 | 天津工业大学 | Method for processing broken yarn in ring spinning spun yarn spinning process |
CN113354276B (en) * | 2021-05-28 | 2023-01-20 | 泰山玻璃纤维邹城有限公司 | Step-by-step superfine yarn drawing forming process and formed spinning cake thereof |
CN114348773B (en) * | 2022-01-25 | 2024-05-14 | 东华大学 | Device for winding, twisting and collecting velvet |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2590374A (en) * | 1949-10-07 | 1952-03-25 | Clemson Agricultural College O | Yarn twister for spinning frames |
US4674274A (en) * | 1985-11-15 | 1987-06-23 | Murata Kikia Kabushiki Kaisha | Apparatus for manufacturing spun yarn |
US4852341A (en) * | 1987-04-16 | 1989-08-01 | Murata Kikai Kabushiki Kaisha | Belt type false twister |
US4959952A (en) * | 1987-04-22 | 1990-10-02 | Murata Kikai Kabushiki Kaisha | Operation starting method for spinning machine |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH359511A (en) * | 1959-04-27 | 1962-01-15 | Kontexta Kontinentale Textil A | Machine for giving a false twist to a thread |
-
1996
- 1996-02-29 AU AUPN8384A patent/AUPN838496A0/en not_active Abandoned
-
1997
- 1997-02-28 JP JP53046897A patent/JP2001508133A/en active Pending
- 1997-02-28 EP EP97904925A patent/EP0883702A4/en not_active Withdrawn
- 1997-02-28 BR BR9707790A patent/BR9707790A/en not_active Application Discontinuation
- 1997-02-28 CN CN97192676A patent/CN1212737A/en active Pending
- 1997-02-28 PL PL97328866A patent/PL328866A1/en unknown
- 1997-02-28 CA CA002247242A patent/CA2247242A1/en not_active Abandoned
- 1997-02-28 TR TR1998/01684T patent/TR199801684T2/en unknown
- 1997-02-28 KR KR1019980706818A patent/KR19990087402A/en not_active Application Discontinuation
- 1997-02-28 WO PCT/AU1997/000118 patent/WO1997032064A1/en not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2590374A (en) * | 1949-10-07 | 1952-03-25 | Clemson Agricultural College O | Yarn twister for spinning frames |
US4674274A (en) * | 1985-11-15 | 1987-06-23 | Murata Kikia Kabushiki Kaisha | Apparatus for manufacturing spun yarn |
US4852341A (en) * | 1987-04-16 | 1989-08-01 | Murata Kikai Kabushiki Kaisha | Belt type false twister |
US4959952A (en) * | 1987-04-22 | 1990-10-02 | Murata Kikai Kabushiki Kaisha | Operation starting method for spinning machine |
Non-Patent Citations (1)
Title |
---|
See also references of EP0883702A4 * |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2176453A1 (en) * | 2007-07-02 | 2010-04-21 | The Hong Kong Polytechnic University | Method of industrially producing a yarn and the textile product thereof, and a ring spinning machine that carries the method |
EP2176453A4 (en) * | 2007-07-02 | 2011-07-20 | Univ Hong Kong Polytechnic | Method of industrially producing a yarn and the textile product thereof, and a ring spinning machine that carries the method |
US8544252B2 (en) | 2008-08-04 | 2013-10-01 | The Hong Kong Polytechnic University | Method and apparatus for reducing residual torque and neps in singles ring yarns |
WO2013143455A1 (en) * | 2012-03-27 | 2013-10-03 | The Hong Kong Polytechnic University | Method and apparatus for imparting false twist to yarn before ring spinning |
US8549830B1 (en) | 2012-03-27 | 2013-10-08 | Hong Kong Polytechnic University | Method and apparatus for imparting false twist to yarn before ring spinning |
DE102013108096A1 (en) * | 2013-07-29 | 2015-01-29 | Maschinenfabrik Rieter Ag | Spinning machine and false twisting device |
DE102013108095A1 (en) * | 2013-07-29 | 2015-01-29 | Maschinenfabrik Rieter Ag | Spinning machine and false twisting device |
DE102013108094A1 (en) * | 2013-07-29 | 2015-01-29 | Maschinenfabrik Rieter Ag | Spinning machine and false twisting device |
DE102013113290A1 (en) * | 2013-12-02 | 2015-06-03 | Maschinenfabrik Rieter Ag | Spinning machine, false twisting device and catch hook |
DE102014105821A1 (en) * | 2014-04-25 | 2015-10-29 | Maschinenfabrik Rieter Ag | Spinning machine, false twisting device and catching device |
WO2015162250A1 (en) * | 2014-04-25 | 2015-10-29 | Maschinenfabrik Rieter Ag | Spinning machine, false twist device, and catching device |
DE102014107137A1 (en) * | 2014-05-21 | 2015-11-26 | Maschinenfabrik Rieter Ag | spinning machine |
DE102014108194A1 (en) * | 2014-06-11 | 2015-12-17 | Maschinenfabrik Rieter Ag | Spinning machine and false twisting device |
DE102016105718A1 (en) * | 2016-03-29 | 2017-10-05 | Maschinenfabrik Rieter Ag | Belt for use in a false twisting device of a spinning machine |
Also Published As
Publication number | Publication date |
---|---|
JP2001508133A (en) | 2001-06-19 |
CN1212737A (en) | 1999-03-31 |
KR19990087402A (en) | 1999-12-27 |
PL328866A1 (en) | 1999-03-01 |
EP0883702A4 (en) | 1999-06-09 |
EP0883702A1 (en) | 1998-12-16 |
AUPN838496A0 (en) | 1996-03-21 |
TR199801684T2 (en) | 1999-09-21 |
CA2247242A1 (en) | 1997-09-04 |
BR9707790A (en) | 1999-07-27 |
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