US20090094793A1 - Drafting assembly and method of drafting a web - Google Patents

Drafting assembly and method of drafting a web Download PDF

Info

Publication number
US20090094793A1
US20090094793A1 US11/719,131 US71913105A US2009094793A1 US 20090094793 A1 US20090094793 A1 US 20090094793A1 US 71913105 A US71913105 A US 71913105A US 2009094793 A1 US2009094793 A1 US 2009094793A1
Authority
US
United States
Prior art keywords
drafting
nip
nip point
web
assembly
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
US11/719,131
Other languages
English (en)
Inventor
Cherian Iype
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.)
Super Spinning Mills Ltd
Original Assignee
Super Spinning Mills Ltd
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 Super Spinning Mills Ltd filed Critical Super Spinning Mills Ltd
Assigned to SUPER SPINNING MILLS LIMITED reassignment SUPER SPINNING MILLS LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: IYPE, CHERIAN
Publication of US20090094793A1 publication Critical patent/US20090094793A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/02—Carding machines
    • D01G15/12—Details
    • D01G15/46—Doffing or like arrangements for removing fibres from carding elements; Web-dividing apparatus; Condensers
    • D01G15/64—Drafting or twisting apparatus associated with doffing arrangements or with web-dividing apparatus
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/26—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by one or more endless aprons

Definitions

  • the present invention relates to a drafting assembly and method of drafting. More particularly, but not exclusively, the present invention relates to a drafting apparatus comprising two pairs of drafting aprons separated by a gap and arranged to generate a drafting force on fibres in a web which span the gap; the drafting aprons each being substantially wedge shaped proximate to the nip points.
  • the drafting apparatus comprises front and rear roller pairs.
  • the front roller pair rotate more quickly than the rear pair so creating a drafting force on the fibres in the sliver or strand.
  • Such an apparatus is suitable for drafting slivers, rovings or strands since the sliver, roving or strand is thick enough or is immediately twisted so there is little problem of the fibres lapping around the front rollers. It is also known to draft card webs. Fibres in a card web are less consolidated and require larger rollers to prevent lapping. Fibres in a card web are also not aligned.
  • Apparatus for the drafting of card webs are restricted to drafting of worsted type long fibres, since it permits the use of relatively large rollers which prevent fibre lapping of rollers whilst having sufficient control of the fibres in drafting.
  • the present invention seeks to alleviate this problem.
  • the present invention provides:
  • the wedge shaped nature of the apron loops proximate to the nip point enables cotton type card web to be drafted, so significantly improving the properties of the drafted web.
  • the arms of at least one of the loops on each side of the nip point are substantially planar.
  • the drafting assembly further comprises a drive assembly for displacing the aprons, the drive assembly being adapted to displace the front aprons more rapidly than the rear aprons so generating a drafting force on the fibres in the web gripped by the front and rear nip points.
  • At least one of the aprons can comprise a planar portion defining a support surface.
  • the loop can be nylon, PVC or rubber, preferably reinforced rubber.
  • the loop can be a composite material.
  • the loop can be polyurethane.
  • the drafting assembly comprises upper and lower rear nip rollers arranged to nip the upper and lower rear aprons between them to create the rear nip point.
  • the drafting assembly could comprise upper and lower rear nip bars arranged to nip the upper and lower rear aprons between them to create the rear nip point.
  • the drafting assembly could also comprise upper and lower front nip rollers arranged to nip the upper and lower front aprons between them to create the front nip point.
  • the drafting assembly could comprise upper and lower front nip bars arranged to nip the upper or lower front spans between them to create the front nip point.
  • the drive assembly can comprise at least one drive roller which abuts an apron and is adapted to displace the apron on rotation of the drive roller.
  • the drive roller can be positioned within the loop.
  • a carding assembly comprising
  • the carding assembly can further comprise consolidating means for partially reducing the width of the web before it is received by the drafting assembly.
  • the carding assembly could also comprise a further consolidating means for receiving the drafted web from the drafting assembly and further reducing its width to a sliver.
  • FIGS. 1 and 2 show, in schematic form, drafting assemblies for drafting slivers, rovings or strands;
  • FIGS. 3 and 4 show further known drafting assemblies in cross section
  • FIG. 5 shows a further known drafting assembly in cross section
  • FIG. 6 shows a drafting assembly according the invention in cross section
  • FIG. 7 shows a carding assembly according to the invention.
  • Short fibres are not conducive to the production of high quality yarns.
  • the yarns are therefore combed to remove these. Combing takes place after carding but before spinning.
  • the fibres need to be aligned before they can be subjected to the combing process. This is done by drafting.
  • FIGS. 1 and 2 Shown in FIGS. 1 and 2 in schematic form are known as roller drafting assemblies ( 1 ).
  • the drafting assembly ( 1 ) of FIG. 1 comprises a pair of front rollers ( 2 ) and a pair of rear rollers ( 3 ).
  • the front rollers ( 2 ) are arranged to rotate more rapidly than the rear rollers ( 3 ) so producing a drafting force on the fibres ( 4 ) as they move between the two sets of rollers ( 2 , 3 ).
  • the assembly ( 1 ) shown in FIG. 2 includes a pair of rear aprons ( 5 , 6 ) for better control of fibres.
  • Roller drafting is typically performed on slivers and rovings or occasionally on card webs. It is known that a large proportion of the fibres in the card sliver or web are hooked as a result of the carding process. Hook free material can lead to better quality of yarn and/or lower the amount of comber waste.
  • the assemblies of FIGS. 1 and 2 are however only suitable for drafting of slivers and rovings. The consolidated nature of slivers and rovings reduces the tendency of the fibres to lap around the rollers.
  • the apparatus of FIGS. 1 and 2 are not suitable for drafting card web fibres. This is because fibres in the web are less consolidated and can lap more easily. If the apparatus of FIG. 2 were to be used to draft card webs the diameter of the rollers would have to be large to reduce fibre lapping. This would however increase the distance between the nip points to an unacceptable degree.
  • FIGS. 3 and 4 Shown in FIGS. 3 and 4 are further known drafting assemblies. These assemblies are attempts to overcome this problem.
  • Each of the assemblies comprises upper and lower rear aprons ( 7 , 8 ).
  • the upper and lower rear aprons ( 7 , 8 ) each comprise a flexible loop of material ( 9 , 10 ), typically pvc, nylon, rubber, polyurethane or a composite material.
  • a drive assembly Positioned within each loop ( 9 , 10 ) is a drive assembly ( 11 , 12 ) comprising a drive roller ( 13 , 14 ) which abuts the loop ( 9 , 10 ). Turning the drive roller ( 13 , 14 ) turns the loop ( 9 , 10 ).
  • Each of the aprons ( 7 , 8 ) includes a planar support portion ( 15 , 16 ).
  • the two planar support portions ( 15 , 16 ) are arranged to grip the fibres of a sliver received at an entrance ( 17 ) between them.
  • the rear nip point ( 18 ) is created by upper and lower rear nip rollers ( 19 , 20 ) which nip the upper and lower aprons ( 7 , 8 ) between them.
  • the embodiment of FIG. 3 does not include a front apron and is generally used for drafting worsted card slivers.
  • the drafting assembly of FIG. 4 further comprises a front apron ( 21 ) in the form of a loop ( 22 ) having a shape defined by tensioning means ( 23 ).
  • a lower front nip roller ( 24 ) is positioned within and abuts against the front apron loop ( 22 ).
  • An upper nip roller ( 25 ) nips the apron ( 21 ) between it and the lower nip roller ( 24 ) creating a front nip point ( 26 ).
  • the front and rear nip points ( 26 , 18 ) are arranged such that the fibres which exit the rear nip point ( 18 ) are received by the front nip point ( 26 ).
  • Such drafting assemblies can be used for sliver drafting or worsted type web drafting. However, again they are not suitable for drafting cotton type card webs as the distance between the nip point is unacceptably large.
  • the reduction in size of one of the front nip point rollers partially reduces the distance between front and rear nip points and is suitable for worsted type card web drafting.
  • the relatively large upper nip rollers ( 25 ) in FIGS. 3 and 4 places a limit on how close together the front and rear nip point ( 26 , 18 ) can be. This in turn places a relatively large lower limit on the length of fibre which can be controlled in the drafting process. Fibres below this limit either because of their length or because of their relative orientation or configuration will tend to be uncontrolled.
  • reducing of the size of the upper front drafting roller would result in the fibres from the web lapping around the roller. Because of this such apparatus is not suitable for drafting cotton type card web.
  • FIG. 5 Shown in FIG. 5 is an assembly similar to that of FIG. 2 . Like reference numerals are used for like parts. Further aprons are arranged around the front rollers. Such a system is disclosed in DE 4141237. The use of further aprons in such systems is to carry the fibres forward to further rollers in some arrangement that improves yarn quality. Such assemblies are also not suitable for drafting cotton type card webs. One cannot simply reduce the front rollers to reduce the distance between the nip points. As the roller diameters are reduced to the levels required for effective drafting of cotton type cad webs the rollers become difficult to drive.
  • the drafting assembly comprises upper and lower rear aprons ( 27 , 28 ).
  • the drafting assembly further comprises upper and lower front aprons ( 29 , 30 ) in the form of loops.
  • Associated with each apron ( 27 - 30 ) is a drive assembly ( 31 ) within the loop.
  • Each drive assembly ( 31 ) comprises a drive roller ( 32 ) which abuts against the inside of each respective loop and which drives rotation of the loop.
  • the upper and lower front aprons ( 29 , 30 ) have third and fourth support surfaces ( 33 , 34 ) respectively. These are arranged to grip the fibre web received at a front nip point ( 35 ) and transport it to an exit point ( 36 ).
  • the front nip point ( 35 ) is created by upper and lower front nip rollers ( 37 , 38 ). These nip the upper and lower front aprons ( 29 , 30 ) between them.
  • the rear nip point is created by upper and lower rear nip rollers.
  • the above drive assembly ( 31 ) rotates the upper and lower rear aprons ( 27 , 28 ) transporting the web from the entrance ( 39 ) to the rear nip point ( 40 ).
  • the web exits the rear nip point ( 40 ) and is received by the front nip point ( 35 ). From here it is transported to the exit point ( 36 ).
  • the drive rollers ( 32 ) rotate the front aprons ( 29 , 30 ) more rapidly than the rear ( 27 , 28 ) so producing a drafting action on fibres as they span the gap between the front and rear nip points ( 35 , 40 ).
  • the aprons close to the nip points are arranged to be wedge shaped with the arms of the apron on each side of a nip roller converging toward the nip roller and having an acute angle between them.
  • the wedge shaped aprons on opposite sides of the nip points face each other. In this embodiment the arms are planar.
  • This wedge shaped arrangement allows the front and rear nip points to be positioned close together.
  • the apparatus according to the invention can use small front rollers.
  • the aprons avoid the problem of fibre lapping.
  • the arrangement of the aprons results in a short distance between the nip points and rollers which are relatively easy to drive.
  • the apparatus can therefore be used to draft shorter fibres under control in webs than known drafting apparatus. This results in a commercially significant improvement in the web with a significant reduction in noil in the subsequent combing process.
  • FIG. 7 Shown in FIG. 7 is a carding assembly ( 41 ) according to the invention.
  • the carding assembly ( 41 ) comprises a carding roller ( 42 ) for producing a web which is received by the drafting assembly of FIG. 6 .
  • a consolidating means Arranged between the carding roller ( 42 ) and drafting assembly is a consolidating means (not shown). The consolidating means reduces the width of the web. The web is however still maintained wider and more open than a sliver.
  • the carding assembly comprises a further consolidating means which further consolidates the drafted web as it leaves the drafting assembly.
  • the carding assembly does not include a consolidating means for reducing the width of the web.
  • the nose rollers are replaced by nose bars. This however reduces the drafting speed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)
  • Pens And Brushes (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
US11/719,131 2004-11-11 2005-11-10 Drafting assembly and method of drafting a web Abandoned US20090094793A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB0424896.9 2004-11-11
GB0424896A GB2420124A (en) 2004-11-11 2004-11-11 Fibre drafting apparatus
PCT/GB2005/004327 WO2006051294A1 (en) 2004-11-11 2005-11-10 A drafting assembly and method of drafting a web

Publications (1)

Publication Number Publication Date
US20090094793A1 true US20090094793A1 (en) 2009-04-16

Family

ID=33523541

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/719,131 Abandoned US20090094793A1 (en) 2004-11-11 2005-11-10 Drafting assembly and method of drafting a web

Country Status (8)

Country Link
US (1) US20090094793A1 (de)
EP (1) EP1809795B1 (de)
CN (1) CN101061266B (de)
AT (1) ATE411420T1 (de)
DE (1) DE602005010467D1 (de)
ES (1) ES2315924T3 (de)
GB (2) GB2420124A (de)
WO (1) WO2006051294A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1392408B1 (it) * 2008-12-23 2012-03-02 Texnology S R L Dispositivo di trattamento di un velo di carda
WO2013144748A1 (en) * 2012-03-28 2013-10-03 Lakshmi Machine Works Limited Web drafting assembly of carding machine
IT201900005608A1 (it) * 2019-04-11 2020-10-11 Marzoli Machines Textile Srl Pettinatrice di una linea di preparazione alla filatura
CN111005156B (zh) * 2019-12-19 2021-09-10 瑞安市博安防刺穿材料科技有限公司 一种采用二次拉伸增强非织造无纺布强度的方法

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1970528A (en) * 1932-02-29 1934-08-14 Saco Lowell Shops Drawing mechanism for spinning frames and similar machines
US3119152A (en) * 1960-02-19 1964-01-28 Johnson & Johnson Methods and apparatus for doffing and drafting fibrous webs
US3346926A (en) * 1965-01-05 1967-10-17 Andreani Eugenio Textile apron stabilizing and cleaning system for drafting units
US4070732A (en) * 1974-07-16 1978-01-31 Schlumberger & Cie Textile fibre control system in a drawing device
US4434533A (en) * 1982-02-18 1984-03-06 Nakagawa, Seisakusho Co., Ltd. High draft apparatus for worsted spinning process
US4680833A (en) * 1985-05-07 1987-07-21 NPK "Textiling Maschinostroene" Drawing apparatus
US4980833A (en) * 1988-07-26 1990-12-25 The University Of Tennessee Research Corporation Airplane take-off monitor with learning feature
US5479680A (en) * 1990-04-06 1996-01-02 Stalder; Herbert Sliver drafting apparatus
US20010011410A1 (en) * 2000-02-07 2001-08-09 Fritz Stahlecker And Hans Stahlecker Apparatus of a spinning machine for condensing a fibre strand
US20010014995A1 (en) * 2000-02-22 2001-08-23 Fritz Stahlecker And Hans Stahlecker Apparatus of a spinning machine for condensing a fiber strand

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB719355A (de) *
GB1120222A (en) * 1964-06-22 1968-07-17 Carding Spec Canada Improvements in or relating to textile carding machines
US3370326A (en) * 1965-09-20 1968-02-27 Fieldcrest Mills Inc Method and apparatus for forming a web of highly parallelized textile fibers
JPS5668116A (en) * 1979-10-31 1981-06-08 Toray Ind Inc Apron apparatus for fine spinning machine
CN1039632A (zh) * 1988-07-15 1990-02-14 里特机械公司 用于纺纱机的牵伸装置
DE4141237C2 (de) * 1990-12-17 2002-01-17 Zinser Textilmaschinen Gmbh Doppelriemchenstreckwerk für Ringspinnmaschine
DE4139067C2 (de) * 1991-11-28 1993-11-25 Skf Textilmasch Komponenten Doppelriemchenstreckwerk für Spinnereimaschinen
EP0798408B1 (de) * 1996-03-25 1999-12-22 Howa Machinery Limited Streckwerk für eine Feinspinnmaschine
CN2495663Y (zh) * 2001-07-11 2002-06-19 安玉先 细纱机四皮圈牵伸机构

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1970528A (en) * 1932-02-29 1934-08-14 Saco Lowell Shops Drawing mechanism for spinning frames and similar machines
US3119152A (en) * 1960-02-19 1964-01-28 Johnson & Johnson Methods and apparatus for doffing and drafting fibrous webs
US3346926A (en) * 1965-01-05 1967-10-17 Andreani Eugenio Textile apron stabilizing and cleaning system for drafting units
US4070732A (en) * 1974-07-16 1978-01-31 Schlumberger & Cie Textile fibre control system in a drawing device
US4434533A (en) * 1982-02-18 1984-03-06 Nakagawa, Seisakusho Co., Ltd. High draft apparatus for worsted spinning process
US4680833A (en) * 1985-05-07 1987-07-21 NPK "Textiling Maschinostroene" Drawing apparatus
US4980833A (en) * 1988-07-26 1990-12-25 The University Of Tennessee Research Corporation Airplane take-off monitor with learning feature
US5479680A (en) * 1990-04-06 1996-01-02 Stalder; Herbert Sliver drafting apparatus
US20010011410A1 (en) * 2000-02-07 2001-08-09 Fritz Stahlecker And Hans Stahlecker Apparatus of a spinning machine for condensing a fibre strand
US20010014995A1 (en) * 2000-02-22 2001-08-23 Fritz Stahlecker And Hans Stahlecker Apparatus of a spinning machine for condensing a fiber strand

Also Published As

Publication number Publication date
CN101061266A (zh) 2007-10-24
EP1809795B1 (de) 2008-10-15
WO2006051294A1 (en) 2006-05-18
GB2420566B (en) 2008-12-17
DE602005010467D1 (de) 2008-11-27
CN101061266B (zh) 2010-06-16
GB0424896D0 (en) 2004-12-15
ATE411420T1 (de) 2008-10-15
GB2420566A (en) 2006-05-31
GB2420124A (en) 2006-05-17
ES2315924T3 (es) 2009-04-01
GB0522808D0 (en) 2005-12-14
EP1809795A1 (de) 2007-07-25

Similar Documents

Publication Publication Date Title
US20220195639A1 (en) Composite yarn, fabric comprising the composite yarn, method for producing a composite yarn and arrangement for producing a composite yarn
US4700538A (en) Method and apparatus for handling a sliver
CN109763229A (zh) 电磁屏蔽纱线的生产方法
EP1809795B1 (de) Entwurfsanordnung und verfahren zum entwurf eines netzes
CN102330235A (zh) 短纤维束对称包覆刚性纤维长丝的纺纱方法及纺丝装置
BR8403246A (pt) Processo e dispositivo para fiacao de falsa torcao
CN104593907A (zh) 一种棉型纤维的牵切制条方法
CN1046201A (zh) 纺纱纤维的预加工
US3327356A (en) Method of and apparatus for parallelizing and blending textile fibers
Chaudhari et al. Effect of speed frame drafting systems on quality of ring yarn
CN101260584A (zh) 一种易溶性聚酯纤维环锭纺无捻毛巾纱的生产方法
EP0409813A1 (de) Verbesserte Einrichtung am Verzugsteil von Ringspinnmaschinen
US20030115720A1 (en) Fibre processing
CN205313731U (zh) 一种将纱线解捻开松成纤维的装置
CN104562317A (zh) 用于气流纺纱装置的牵伸机构
CN114808224B (zh) 一种赛络紧密纺大差异比例短纤皮芯包缠纱纺纱方法
WO2013144748A1 (en) Web drafting assembly of carding machine
US5802826A (en) Production of core/wrap yarns by airjet and friction spinning in tandem
EP2405039B1 (de) Streckvorrichtung für Spinnmaschine
US12037716B2 (en) Compactor device
CN207079324U (zh) 一种精梳机的牵伸机构
CN1498991A (zh) 用于环锭细纱机的牵伸装置
Wood 10. Drafting and Gilling of Fibrous Assemblies
AU2129801A (en) Fibre processing
CN104603340A (zh) 包括加捻元件的纺纱机

Legal Events

Date Code Title Description
AS Assignment

Owner name: SUPER SPINNING MILLS LIMITED, INDIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:IYPE, CHERIAN;REEL/FRAME:019282/0516

Effective date: 20070503

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO PAY ISSUE FEE