EP0375242A2 - Herstellung von Vorgarn - Google Patents

Herstellung von Vorgarn Download PDF

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Publication number
EP0375242A2
EP0375242A2 EP89312927A EP89312927A EP0375242A2 EP 0375242 A2 EP0375242 A2 EP 0375242A2 EP 89312927 A EP89312927 A EP 89312927A EP 89312927 A EP89312927 A EP 89312927A EP 0375242 A2 EP0375242 A2 EP 0375242A2
Authority
EP
European Patent Office
Prior art keywords
fibres
roving
sliver
orifices
process according
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.)
Withdrawn
Application number
EP89312927A
Other languages
English (en)
French (fr)
Other versions
EP0375242A3 (de
Inventor
Elbert F. Morrison
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.)
Burlington Industries Inc
Original Assignee
Burlington Industries Inc
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 Burlington Industries Inc filed Critical Burlington Industries Inc
Publication of EP0375242A2 publication Critical patent/EP0375242A2/de
Publication of EP0375242A3 publication Critical patent/EP0375242A3/de
Withdrawn legal-status Critical Current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
    • D01H7/00—Spinning or twisting arrangements
    • D01H7/92—Spinning or twisting arrangements for imparting transient twist, i.e. false twist

Definitions

  • roving is generally considered to be in a condition one step removed from finished spun yarn.
  • roving is fibre stock or sliver which has been drawn, drafted and usually twisted in preparation for a following operation, such as ring spinning, typically used in the production of yarn.
  • rub roving equipment In conventional rub roving, the sliver strand is sandwiched between two aprons that oscillate in opposite directions causing the sliver to roll between the aprons, adding strength as a result of the rolling and interlocking of fibres.
  • Rub roving equipment also has disadvantages however. For example, while permitting high speed and overall efficiency, it also has complicated mechanical assemblies and is costly to operate. In addition, the process lends itself to erratic drafting patterns, especially in dyed stocks, causing uneven yarn in spinning. This is also the result of the aprons not being consistent over the entire length of the roving surface, which in turn causes drafting forces to vary.
  • the present invention seeks to eliminate the above objections and disadvantages by utilizing a very simple mechanical device which produces a roving that does not have twist, either real or false.
  • step (a) comprises:
  • said hollow shaft upstream of the orifices, has a diameter of about 9.5 mm.
  • said hollow shaft downstream of the orifices, has a diameter of about 4.7 mm.
  • said orifices each comprise a tapered bore.
  • said orifices taper from a diameter of about 9.5 mm to a diameter of about 4.7 mm.
  • the process is carried out without applying substantially any twist to the fibres.
  • the roving may be wound at about 90 to 136 m/min.
  • the sliver may have a grain weight of from about 1.49 grammes/m to about 12.96 grammes/m.
  • the minor portion of fibres comprise about 5 to about 20% of the drafted sliver.
  • this invention provides an apparatus for the production of roving, said apparatus comprising means for drafting a sliver of fibres to form a drafted sliver; and means for forming said drafted sliver into a roving; characterized in that the roving forming means comprises a rotating nozzle maintained at sub-atmospheric pressure as the sliver of fibres are passed therethrough, the arrangement being such that trailing free ends of a minor portion of the fibres are wrapped around a core of remaining fibres to form the roving.
  • This invention applies known vacuum spinning techniques to the production of roving and, as a result, achieves high quality roving for use in subsequent yarn forming processes.
  • vacuum spinning technology is applied to the manufacture of roving which has neither real nor false twist.
  • the roving process of this invention eliminates many of the problems associated with conventional flyer and rub roving processes, and produces roving which is at least the equal in quality to roving formed by these conventional processes.
  • sliver is coiled into a sliver can by conventional drawing equipment.
  • the sliver which may comprise long or short staple fibres, i.e. from about 2.5 cms (1 inch) to about 15 cms (6 inches) in length, is then fed from the can into a conventional draft system, e.g. the same type of drafting system used in conventional flyer and rub roving processes.
  • a conventional draft system e.g. the same type of drafting system used in conventional flyer and rub roving processes.
  • the drafted stock passes through the back draft roll into an apron zone, it is then drafted through the vacuum nozzle assembly as described below.
  • Fibres of the sliver are pushed and drawn into an entry slot formed in a hollow shaft, or nozzle rotatably mounted in a housing. At this point, the fibres are subject to the dual action of the feed rolls and a vacuum created (by any suitable means) within the nozzle. As the fibres pass through the nozzle, a small portion of the surface fibres' free ends are sucked radially outwardly relative to the direction of travel of the fibre mass, into peripherally located orifices. The radially displaced fibre ends are then immediately pulled out of the orifices as the fibre mass continues its linear movement, and are wrapped around the remaining centrally located core fibres by the rotation of the nozzle. These wrapper fibres preferably constitute from 5 to 20% of the fibres, and experiments have shown that approximately 10% of the wrapped fibres tend to straighten out during subsequent spinning drafting.
  • the number of wrapper fibres can be controlled by nozzle rpm, number and size of orifices in nozzle, vacuum pressure, etc. Due to this ability to control the number of fibres wrapped around the core and how tightly they are wrapped, a roving with superior drafting properties can be produced.
  • the roving is taken up by a take-up roll and wound onto a roving tube at high speed similar to a conventional yarn winder. Winding speed is between 91 and 136 m/min (100-150 yds/min). These roving tubes can be hung in a ring spinning frame creel for spinning either single or double creel, so that a wide variety of yarn counts can be produced.
  • the roving process in accordance with this invention is very flexible as to roving size. Moreover, tests show that if wrapper fibre ratio remains at 15% or less, and these fibres are not wrapped with high pressure, the yarn is equal in quality to roving produced by flyer and rub roving processes.
  • suction in the nozzle eliminates a large volume of heavy waste, such as vegetable matter, dirt, dust, etc., giving the stock a cleaner content.
  • the configuration of the nozzle is similar to that utilized in the production of yarn, with the exception of having to provide a larger diameter through passageway and radial orifices in order to accommodate the much larger roving dimensions.
  • the drafting system is necessarily larger and of heavier construction.
  • the apparatus 10 includes a sliver can or bin 12 from which a sliver S is drawn by a drafting assembly 14 which includes feed roll sets 16, 18 and 20.
  • the draft system acts upon the fibres in the sliver S in a conventional manner and feeds the fibres into a vacuum nozzle assembly 22.
  • the nozzle assembly 22 comprises a housing 24 and an elongated hollow shaft 26 mounted for rotation therein.
  • the shaft has a first entry end 28 and a second exit end 30.
  • a through passageway 31 extends from the end 28 to the end 30.
  • the passageway includes a first portion 32 adjacent the first end 28, an interior chamber portion 34 close to, but spaced from, the first end 28, and a third portion 36 that extends from the chamber portion 34 through the nozzle to the second end 30.
  • the first or entry portion 32 has an entry diameter of about 9.5 mm (3/8 inch) significantly larger than the 4.7 mm (3/16 inch) diameter of the third or exit portion 36, and is connected thereto by a tapered conical portion 33.
  • a plurality of orifices 38 extending from chamber 34 radially outwardly through the shaft 26, to provide communication with the interior of the housing 24.
  • the number of orifices may be varied but is preferably within the range of two to six or more.
  • the passages defined by the orifices may extend substantially perpendicular to the passageway 31, or at an inclined angle relative thereto.
  • the housing 24 is connected via inlet 50 to a vacuum pump or other vacuum source (not shown).
  • Bearings 40, 42 mount the shaft for rotation within the housing.
  • a pulley or gear 44 is press-fit to an exterior cylindrical surface 46 of the shaft 26 so that rotation of the gear effects rotation of the shaft 26.
  • Gear 46 is connected to a drive motor (not shown) or other suitable drive means via belt or chain 48.
  • a pair of take-off rolls 52 is mounted adjacent the outlet end of the nozzle, along with a take-up roll 54 and a roving tube 56 upon which the roving R is wound at speeds of up to 91 to 136 m/min (100-150 yds/min).
  • a conventional transverse motion device 59 is utilized to facilitate winding of the roving on the tube 56.
  • the fibre mass or sliver S having a grain weight of from about 1.49 grammes/m (25 grains/yd) to about 12.96 grammes/m (220 grains/yd), is fed in a linear direction through the drafting assembly 14, after which the mass is pushed and drawn into the interior of the nozzle assembly 22.
  • the air flow created in the housing e.g. via connection of a suitable vacuum source to the housing inlet 50, assists in drawing the fibres into the nozzle assembly along the linear feed direction, while they are at the same time being pushed by feed roll set 20.
  • the wrapper fibres W comprise approximately 5 to 20% of the fibres, and while the wrapper fibres may have some small degree of twist applied thereto, the remaining core fibres C have no twist at all, real or false. It is preferred that the wrapper fibres comprise 15% or less of the fibre mass. Control and adjustment of the amount of wrapper fibres may be achieved through adjustment of nozzle rpm, vacuum pressure and the number and size of the radially oriented orifices.
  • the nozzle 60 has an inlet end 62 and an outlet end 64.
  • a through passageway 66 extends through the nozzle along a longitudinal axis A from the inlet end to the outlet end.
  • a first or entry portion 68 of the passageway includes a constant diameter bore portion 70 and a tapered portion 72 which extends between the inlet end 62 and an interior chamber portion 74.
  • the bore 70 in the entry portion 68 in this exemplary embodiment has an inside diameter of about 9.5 mm (3/8 inch) and tapers to a remaining smooth bore outlet portion 76 which has an inside diameter of about 4.7 mm (3/16 inch) and extends between the chamber 74 and the outlet end 64.
  • Interior chamber 74 is created at the interface of entry portion 68 and outlet portion 76 by intersection with a plurality of, and preferably four, tapered bores 78 which extend inwardly from the circumferential surface 80 of the nozzle.
  • Each bore tapers from a diameter of about 3.9 mm (5/32 inch) to about 3.2 mm (1/8 inch), and each bore is inclined relative to the longitudinal axis A, preferably away from the inlet end of the radially outward direction.
  • the arrangement of the four bores 78 around the outlet portion 76 is shown more clearly in the sectional view of Figure 4.
  • the overall length of the nozzle is about 51 mm (2 inches) and the nozzle has an outside diameter of about 12.7 mm (1/2 inch).
  • a radial flange 82 which may engage a rear wall of the housing 24, while a rearward extension 84 protrudes beyond the housing for reception of a drive gear 44 or other suitable drive means, as shown in Figure 1.
  • this invention is not limited to nozzle designs having only the above described dimensions.
  • the dimensions may be modified as necessary depending on the roving characteristics desired.
  • the above described process applicable to both long and short staple fibre roving production, is a high speed, yet simple and reliable process, the roving product of which is at least equal in quality to that produced by conventional flyer and rub roving processes.

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)
EP19890312927 1988-12-12 1989-12-11 Herstellung von Vorgarn Withdrawn EP0375242A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US28248888A 1988-12-12 1988-12-12
US282488 1988-12-12

Publications (2)

Publication Number Publication Date
EP0375242A2 true EP0375242A2 (de) 1990-06-27
EP0375242A3 EP0375242A3 (de) 1990-11-22

Family

ID=23081729

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890312927 Withdrawn EP0375242A3 (de) 1988-12-12 1989-12-11 Herstellung von Vorgarn

Country Status (4)

Country Link
EP (1) EP0375242A3 (de)
JP (1) JPH02259121A (de)
CN (1) CN1043353A (de)
CA (1) CA2005018A1 (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10251727A1 (de) * 2002-11-05 2004-05-13 Deutsches Institut für Textil- und Faserforschung Stuttgart - Stiftung des öffentlichen Rechts Verfahren und Vorrichtung zur Herstellung von Flyerlunte
WO2005026420A1 (de) * 2003-09-12 2005-03-24 Maschinenfabrik Rieter Ag Strecke-vorspinnmaschinen-kombination zur herstellung von vorgarn mittels eines luftspinnverfahrens
WO2005026421A1 (de) * 2003-09-12 2005-03-24 Maschinenfabrik Rieter Ag Vorrichtung und verfahren zur herstellung von vorgarn mittels luftspinnverfahren
WO2006092176A1 (de) * 2005-03-03 2006-09-08 Rieter Ingolstadt Spinnereimaschinenbau Ag Flyerloses spinnverfahren sowie vorrichtung mit einem streckwerk
CH704780A1 (de) * 2011-04-13 2012-10-15 Rieter Ag Maschf Vorspinnmaschine zur Herstellung eines Vorgarns.
WO2013003962A1 (de) 2011-07-01 2013-01-10 Maschinenfabrik Rieter Ag Vorspinnmaschine zur herstellung eines vorgarns sowie verfahren zum anspinnen eines faserverbands
WO2014041412A2 (de) 2012-09-14 2014-03-20 Maschinenfabrik Rieter Ag Spinnstelle einer vorspinnmaschine
WO2015170157A1 (de) 2014-05-08 2015-11-12 Maschinenfabrik Rieter Ag Textilmaschine, die der herstellung von vorgarn dient, sowie verfahren zum betrieb einer solchen
WO2015170155A1 (de) 2014-05-08 2015-11-12 Maschinenfabrik Rieter Ag Textilmaschine zur herstellung von vorgarn sowie verfahren zum starten der vorgarnherstellung an einer entsprechenden textilmaschine
WO2015181597A1 (de) * 2014-05-26 2015-12-03 Maschinenfabrik Rieter Ag Spinnereivorbereitungsmaschine
WO2015189674A1 (de) 2014-06-13 2015-12-17 Maschinenfabrik Rieter Ag Spinndüse für eine luftspinnmaschine sowie luftspinnmaschine mit einer entsprechenden spinndüse

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4062869B2 (ja) * 2000-09-01 2008-03-19 村田機械株式会社 コアヤーン製造装置及びコアヤーン製造方法
DE102004037957A1 (de) * 2003-10-17 2005-05-19 Trützschler GmbH & Co KG Vorrichtung an einer Strecke mit einer Absaugeinrichtung für Staub, Faserflug u. dgl.
CN101849055B (zh) * 2007-11-06 2012-05-09 罗托卡夫特公司 针织机和用于由粗纱生产针织品的方法
CN106435871A (zh) * 2016-08-31 2017-02-22 长兴县大伟纺织有限公司 一种清洁型并条机
CN114836864A (zh) * 2021-02-02 2022-08-02 江苏京正特种纤维有限公司 一种涡流包芯纱生产装置和生产方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0099726A2 (de) * 1982-07-21 1984-02-01 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Pneumatische Luftdüse zur Herstellung eines Büschelgarns
EP0121602A1 (de) * 1983-04-12 1984-10-17 Maschinenfabrik Rieter Ag Falschdralleinheit
EP0184277A2 (de) * 1984-12-03 1986-06-11 Burlington Industries, Inc. Vakuumspinnen
EP0222981A1 (de) * 1985-11-21 1987-05-27 Schubert & Salzer Maschinenfabrik Aktiengesellschaft Verfahren und Vorrichtung zum Verspinnen von Fasern

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0099726A2 (de) * 1982-07-21 1984-02-01 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Pneumatische Luftdüse zur Herstellung eines Büschelgarns
EP0121602A1 (de) * 1983-04-12 1984-10-17 Maschinenfabrik Rieter Ag Falschdralleinheit
EP0184277A2 (de) * 1984-12-03 1986-06-11 Burlington Industries, Inc. Vakuumspinnen
EP0222981A1 (de) * 1985-11-21 1987-05-27 Schubert & Salzer Maschinenfabrik Aktiengesellschaft Verfahren und Vorrichtung zum Verspinnen von Fasern

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10251727A1 (de) * 2002-11-05 2004-05-13 Deutsches Institut für Textil- und Faserforschung Stuttgart - Stiftung des öffentlichen Rechts Verfahren und Vorrichtung zur Herstellung von Flyerlunte
EP1664404B1 (de) 2003-09-12 2014-06-18 Maschinenfabrik Rieter Ag Vorrichtung zur herstellung von vorgarn mittels luftspinnverfahren und verwendung einer solchen vorrichtung
WO2005026420A1 (de) * 2003-09-12 2005-03-24 Maschinenfabrik Rieter Ag Strecke-vorspinnmaschinen-kombination zur herstellung von vorgarn mittels eines luftspinnverfahrens
WO2005026421A1 (de) * 2003-09-12 2005-03-24 Maschinenfabrik Rieter Ag Vorrichtung und verfahren zur herstellung von vorgarn mittels luftspinnverfahren
US7647760B2 (en) 2003-09-12 2010-01-19 Maschinenfabrik Rieter Ag Drawing frame-roving frame combination for the production of rove by means of a pneumatic spinning process
US7661259B2 (en) 2003-09-12 2010-02-16 Maschinenfabrik Rieter Ag Device and method for the manufacture of a roving yarn by means of air spinning processes
WO2006092176A1 (de) * 2005-03-03 2006-09-08 Rieter Ingolstadt Spinnereimaschinenbau Ag Flyerloses spinnverfahren sowie vorrichtung mit einem streckwerk
CH704780A1 (de) * 2011-04-13 2012-10-15 Rieter Ag Maschf Vorspinnmaschine zur Herstellung eines Vorgarns.
EP2511403A1 (de) 2011-04-13 2012-10-17 Maschinenfabrik Rieter AG Vorspinnmaschine zur Herstellung eines Vorgarns
US8607540B2 (en) 2011-04-13 2013-12-17 Maschinenfabrik Rieter Ag Roving machine for producing a roving
WO2013003962A1 (de) 2011-07-01 2013-01-10 Maschinenfabrik Rieter Ag Vorspinnmaschine zur herstellung eines vorgarns sowie verfahren zum anspinnen eines faserverbands
US9238881B2 (en) 2011-07-01 2016-01-19 Maschinenfabrik Rieter Ag Roving machine for producing a roving and method for piecing a fiber sliver
US9677197B2 (en) 2012-09-14 2017-06-13 Maschinenfabrik Rieter Ag Spinning station of a spinning preparation machine
DE102012108613A1 (de) 2012-09-14 2014-03-20 Maschinenfabrik Rieter Ag Spinnstelle einer Vorspinnmaschine
WO2014041412A2 (de) 2012-09-14 2014-03-20 Maschinenfabrik Rieter Ag Spinnstelle einer vorspinnmaschine
CN106460245B (zh) * 2014-05-08 2019-04-12 里特机械公司 用于生产粗纱的纺织机和用于操作这种纺织机的方法
WO2015170155A1 (de) 2014-05-08 2015-11-12 Maschinenfabrik Rieter Ag Textilmaschine zur herstellung von vorgarn sowie verfahren zum starten der vorgarnherstellung an einer entsprechenden textilmaschine
US10563326B2 (en) 2014-05-08 2020-02-18 Maschinenfabrik Rieter Ag Textile machine for producing roving and method for starting the roving production on a corresponding textile machine
US10533267B2 (en) 2014-05-08 2020-01-14 Maschinenfabrik Rieter Ag Textile machine for the production of roving and method for operating the same
WO2015170157A1 (de) 2014-05-08 2015-11-12 Maschinenfabrik Rieter Ag Textilmaschine, die der herstellung von vorgarn dient, sowie verfahren zum betrieb einer solchen
CN106460245A (zh) * 2014-05-08 2017-02-22 里特机械公司 用于生产粗纱的纺织机和用于操作这种纺织机的方法
CN106460252B (zh) * 2014-05-26 2019-07-30 里特机械公司 纺纱准备机
CN106460252A (zh) * 2014-05-26 2017-02-22 里特机械公司 纺纱准备机
US10378126B2 (en) 2014-05-26 2019-08-13 Maschinenfabrik Rieter Ag Spinning preparation machine
WO2015181597A1 (de) * 2014-05-26 2015-12-03 Maschinenfabrik Rieter Ag Spinnereivorbereitungsmaschine
WO2015189674A1 (de) 2014-06-13 2015-12-17 Maschinenfabrik Rieter Ag Spinndüse für eine luftspinnmaschine sowie luftspinnmaschine mit einer entsprechenden spinndüse

Also Published As

Publication number Publication date
JPH02259121A (ja) 1990-10-19
CN1043353A (zh) 1990-06-27
EP0375242A3 (de) 1990-11-22
CA2005018A1 (en) 1990-06-12

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