EP1926848A1 - Groupe de buses a air destine a un dispositif de filage a buses a air - Google Patents

Groupe de buses a air destine a un dispositif de filage a buses a air

Info

Publication number
EP1926848A1
EP1926848A1 EP06776298A EP06776298A EP1926848A1 EP 1926848 A1 EP1926848 A1 EP 1926848A1 EP 06776298 A EP06776298 A EP 06776298A EP 06776298 A EP06776298 A EP 06776298A EP 1926848 A1 EP1926848 A1 EP 1926848A1
Authority
EP
European Patent Office
Prior art keywords
air
inclination
compressed air
injection channels
injection
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Withdrawn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
EP06776298A
Other languages
German (de)
English (en)
Inventor
Gerd Stahlecker
Dr. Volker Jehle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maschinenfabrik Rieter AG
Original Assignee
Maschinenfabrik Rieter AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP1926848A1 publication Critical patent/EP1926848A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/02—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques imparting twist by a fluid, e.g. air vortex
    • 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

Definitions

  • the invention relates to an air jet unit for an air jet spinning device for producing a spun yarn from a staple fiber composite, comprising a vortex chamber and a plurality of injection channels opening into the vortex chamber for supplying fluids, wherein at least two injection channels have a different inclination angle with respect to a parallels to the axis of the spun thread ,
  • the fibers of an untwisted staple fiber strand are given spin rotation by an air jet, which gives the finished thread its strength.
  • the staple fiber strand is guided into a vortex chamber, in which a rotating vortex flow prevails, which is usually generated by opening into the vortex chamber and acted upon by compressed air injection channels.
  • the compressed air injected into the vortex chamber must fulfill two functions. First, the compressed air must form a rotating vortex flow, which gives the fibers of the fed staple fiber strand its spin rotation. Second, the compressed air must flow into the swirl chamber, which at the inlet port of a fiber feed channel for the staple fiber strand creates a sufficiently great negative pressure through which the staple fiber strand is transported from the delivery line into the swirl chamber.
  • a disadvantage of the known Gutdusenaggregaten is that the angle of inclination of the injection channel must be set as a compromise between two conflicting requirements The smaller the angle of inclination, ie the more they approach a parallel to the axis of the spun yarn, the greater the negative pressure at the inlet opening of At the same time, however, the peripheral forces of the eddy current rotating about the axis of the staple fiber bundle decrease, and the spun thread has only a low strength.
  • the angle of inclination of the injection channel is chosen to be very large, ie close to 90 ° to the axis
  • the rotating eddy current generates a thread of high strength, but it comes to a reduced negative pressure at the inlet opening, which deteriorates the Ansaug the Lucasdusenaggregates and the fiber transport into the vortex chamber and Fadenb can smoke
  • a Beerdusenaggregat is also known in which a further injection channel is described for a fluid which is arranged coaxially to the axis of the spun yarn
  • This injection channel is used exclusively for supplying water into the vortex chamber, whereby the spun Fasermate ⁇ al moistened
  • the aim is to improve the strength of the spun yarn by the direct moistening during spinning and to be able to dispense with large humidifiers for the ambient air
  • the invention is based on the object to avoid the disadvantages mentioned and to provide a Heildusenaggregat, which has both a good twist distribution and a good intake behavior
  • the object is achieved in that at least two injection channels with different angles of inclination can be connected to at least one compressed air source
  • At least two injection channels with different angles of inclination which are all acted upon with compressed air, can advantageously influence the eddy current in the vortex chamber at least one, but advantageously several injection channels are arranged in position and angle of inclination so that ensures a good twist distribution of the fibers of the staple fiber
  • a relatively large angle of inclination and an opening of this injection channel that tapers tangentially into the vortex chamber are advantageous for ensuring good intake behavior and ensuring safe transport of the staple fiber strand from the pair of delivery rollers in the vortex chamber
  • at least one further injection channel acted upon with compressed air is provided, which has a smaller angle of inclination than the aforementioned injection channels for swirl distribution.
  • the injection channel with a smaller angle of inclination essentially causes the formation of a negative pressure at the inlet opening of the fiber feed channel.
  • the at least one injection channel for generating negative pressure has a different distance, in particular a smaller distance from the inlet opening than the injection channels for generating swirl. This proximity to the inlet opening enhances the formation of negative pressure.
  • At least one injection channel for compressed air has an inclination angle of less than 5 °, preferably even 0 °, that is, this injection channel should be substantially parallel to the axis of the spun yarn.
  • the injection channel it may be advantageous to arrange the injection channel so that its mouth is directed towards the center of the rotating vortex flow. It can be largely avoided as a disturbance of the rotation of the vortex flow.
  • the turbulence can be adjusted accordingly, for example by selecting the number and the diameter of the injection channels.
  • At least two injection channels with different angles of inclination to separately controllable compressed air sources can be connected. Due to the separately controllable compressed air sources, the pressure and or the flow rate of the air through the different injection channels can be changed during the spinning process. As a result, a helical vortex flow having a variable pitch in the vortex chamber can be generated in an advantageous manner with the compressed air flowing out of the injection channels. It is advantageous that the vortex flow is helical with a pitch that matches the take-off speed of the spun yarn and its rotation. Further advantages and features of the invention will become apparent from the following description of an embodiment.
  • FIG. 1 shows, in a high magnification, an axial section through an air jet unit of an air jet spinning device
  • FIG. 2 shows a view cut along the sectional surface H-II of the air jet unit from FIG. 1.
  • the air jet spinning device includes a delivery device 1 for feeding a staple fiber strand 2 to be spun and an air jet unit 3 in which the staple fiber strand 2 is given the rotation required to spin a thread 4.
  • the delivery device 1 includes a pair of delivery rollers 5, 6, which is upstream of the air nozzle unit 3 at a small distance and in which it may be the output rollers of a drafting system, not otherwise shown.
  • a drafting system warps in a known manner a fed sliver or a roving to a staple fiber strand 2 of the desired fineness.
  • the delivery device 1 may alternatively be a pair of pinch rollers of another drafting device or of another upstream aggregate.
  • Denoted at 7 is a nip line at which the staple fiber strand 2 supplied in the delivery direction A is kept clamped before entering the air jet unit 3.
  • the air jet unit 3 generates for the yarn to be spun 4 its rotation and delivers the yarn 4 in the yarn withdrawal direction B by means of a pair of draw-off rollers, not shown.
  • the air jet unit 3 contains inter alia a Faserzu Switzerland 8 and a substantially hollow cylindrical vortex chamber 9.
  • a fluid means generates in the vortex chamber 9 by blowing compressed air through opening into the vortex chamber 9 injection channels 10 a vortex flow.
  • the injection channels 10 start from an annular space 1 1, which is supplied by a compressed air source 12 shown as a supply line with compressed air.
  • the inflow direction of the compressed air is designated C.
  • the injection channels 10 have an angle of inclination ⁇ with respect to a parallel line 13 to the axis of the spun thread 4, which is advantageously between 30 ° and 90 °.
  • the injection channels 10 - as can be seen in Figure 2 - tangential in the vortex chamber 9, whereby a rotating vortex flow is formed.
  • injection channels 10 which run skew in space are projected into the plane of the drawing in each case for reasons of clarity in FIGS. 1 and 2.
  • the emerging from the injection channels 10 compressed air is discharged through an exhaust duct 14 which surrounds a spindle-shaped member 15 in an annular manner.
  • a thread withdrawal channel 16 is arranged in the spindle-shaped member 15 in an annular manner.
  • a thread withdrawal channel 16 is arranged in the end region of the fiber feed channel 8 .
  • an edge 17 of a fiber guide surface 18 is arranged as a Drailerperre, which is eccentric to the yarn withdrawal channel 16 in the region of the inlet opening 19.
  • the fibers to be spun are held on the one hand in the staple fiber structure 2 and thus guided by the fiber feed channel 8 substantially without rotation in the yarn withdrawal channel 16.
  • the fibers are exposed to the action of the swirling flow through which they or at least their end regions are radially driven away from the inlet opening 19 of the yarn withdrawal channel 16.
  • the threads 4 so produced therefore exhibit a core of substantially longitudinally extending fibers or fiber portions without substantial rotation and an outer portion in which the fibers or fiber portions are rotated about the core.
  • the rotation of the vortex flow in the vortex chamber 9 is influenced by the inclination angle ⁇ of the injection channels 10.
  • the negative pressure at the inlet opening 20 ensures a transport of the staple fiber strand 2 from the nip line 7 of the delivery roller pair 5, 6 in the vortex chamber 9.
  • the amount of negative pressure at the inlet port 20 can also be influenced by the inclination angle ⁇ of the injection channels 10, namely the lower the pressure is, the higher the smaller the inclination angle ⁇ is. In the case of the air nozzle units 3 known in the prior art, all injection channels acted upon with compressed air were always arranged at the same angle of inclination ⁇ .
  • the injection channels 21 start from an annular space 22 and open at a smaller angle of inclination than the injection channels 10 in the swirl chamber 9.
  • the injection channels 21 shown in Figure 1 have an inclination angle of 0 °, ie they are parallel to the axis of the spun yarn 4th
  • the annular space 22 is in turn supplied by a simplified illustrated as a supply air pressure source 23 in the inflow direction D with compressed air.
  • the turbulence in the vortex chamber 9 can be optimally adapted to the desired properties since now the rotation of the vortex flow and the negative pressure arising at the inlet opening 20 can be influenced separately. It is thus possible with the compressed air flowing from the injection channels 10 and 21 to generate a helical vortex flow with a variable pitch in the vortex chamber.
  • the separate influencing of the turbulent flow through the various injection channels 10 and 21 is better, the smaller the distance of the entry point of the injection channels 21 in the vortex chamber 9 from the inlet port 20, that is, the further - seen in the fiber transport direction - upstream of the injection channels 21st are arranged.
  • a smaller distance between the injection channels 21 and the inlet opening 20 makes it possible to achieve a higher negative pressure at the inlet opening 20 with a smaller air throughput.
  • the compressed air source 12 and the compressed air 23 in such a way that the parameters of the incoming compressed air, such as, for example, air pressure or air quantity, can be regulated separately during the spinning process. It is thus possible in an advantageous manner to adapt the turbulent flow in the vortex chamber 9 to changing parameters of the staple fiber strand 2 to be spun. It may, for example, be advantageous if, during the spinning process, the delivery speed in the direction A and the thread withdrawal speed in the direction B are increased, at the same time increasing the air pressure of the compressed air flowing through the injection channels 21, thereby, for example, the air velocity in the fiber feed channel of the increased speed of the staple fiber strand 2 adapt.
  • the air nozzle unit 3 shown thus has the great advantage of a very variable usability.
  • the number of injection channels 10 and 21 shown is only an example and can be varied depending on the requirement.

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)
  • Preliminary Treatment Of Fibers (AREA)

Abstract

L'invention concerne un groupe de buses à air (3) destiné à un dispositif de filage à buses à air, conçu pour la fabrication d'un fil filé (4) à partir d'une bande de fibres discontinues. Le groupe de buses à air selon l'invention comporte une chambre de turbulence (9) et plusieurs canaux d'injection (10, 21) aboutissant dans la chambre de turbulence, destinés à l'introduction de liquides. Au moins deux canaux d'injection présentent un angle d'inclinaison différent par rapport à une parallèle à l'axe du fil filé. Au moins deux canaux d'injection à angles d'inclinaison différents peuvent être connectés à au moins une source d'air pressurisé. Les canaux d'injection à angles d'inclinaison différents peuvent de préférence être connectés à des sources d'air pressurisé pouvant être régulées séparément.
EP06776298A 2005-09-19 2006-07-19 Groupe de buses a air destine a un dispositif de filage a buses a air Withdrawn EP1926848A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005045703A DE102005045703A1 (de) 2005-09-19 2005-09-19 Luftdüsenaggregat für eine Luftdüsenspinnvorrichtung
PCT/EP2006/007095 WO2007033717A1 (fr) 2005-09-19 2006-07-19 Groupe de buses a air destine a un dispositif de filage a buses a air

Publications (1)

Publication Number Publication Date
EP1926848A1 true EP1926848A1 (fr) 2008-06-04

Family

ID=37114340

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06776298A Withdrawn EP1926848A1 (fr) 2005-09-19 2006-07-19 Groupe de buses a air destine a un dispositif de filage a buses a air

Country Status (6)

Country Link
US (1) US20080276594A1 (fr)
EP (1) EP1926848A1 (fr)
JP (1) JP2009509051A (fr)
CN (1) CN101268222A (fr)
DE (1) DE102005045703A1 (fr)
WO (1) WO2007033717A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE102007006674A1 (de) * 2007-02-10 2008-08-14 Oerlikon Textile Gmbh & Co. Kg Luftspinnvorrichtung
JP5162975B2 (ja) * 2007-06-21 2013-03-13 村田機械株式会社 紡績装置
JP5333987B2 (ja) * 2008-12-19 2013-11-06 村田機械株式会社 空気紡績機
CH705221A1 (de) * 2011-07-01 2013-01-15 Rieter Ag Maschf Vorspinnmaschine zur Herstellung eines Vorgarns sowie Verfahren zum Anspinnen eines Faserverbands.
BG111020A (bg) * 2011-08-24 2013-02-28 ЕТ-"Д-А-Динко Бахов" Метод и устройство за изпридане на прежда с въздушен вихър
DE102012101039A1 (de) * 2012-02-09 2013-08-14 Maschinenfabrik Rieter Ag Luftspinnmaschine mit separaten Spinn- und Anspinndüsen
CN102618974B (zh) * 2012-04-16 2014-07-02 东华大学 一种在细纱过程中实现单纱加捻成股线的装置
CH706923A1 (de) * 2012-09-07 2014-03-14 Rieter Ag Maschf Spinnstelle einer Luftspinnmaschine.
DE102012108613A1 (de) * 2012-09-14 2014-03-20 Maschinenfabrik Rieter Ag Spinnstelle einer Vorspinnmaschine
JP6015862B2 (ja) 2013-07-22 2016-10-26 村田機械株式会社 糸製造装置
EP3026153B1 (fr) 2013-07-22 2021-10-13 Murata Machinery, Ltd. Dispositif de fabrication de fil, et partie regroupement préalable
CH709466A1 (de) * 2014-04-03 2015-10-15 Rieter Ag Maschf Spinnstelle einer Luftspinnmaschine sowie Verfahren zum Betrieb einer Luftspinnmaschine.
CH709465A1 (de) * 2014-04-03 2015-10-15 Rieter Ag Maschf Luftspinnmaschine sowie Verfahren zum Betrieb einer Luftspinnmaschine.
CN104480581A (zh) * 2014-11-28 2015-04-01 陕西宝成航空仪表有限责任公司 用于纺纱加捻前导纱的纱线控制器
BG111987A (bg) * 2015-04-20 2016-10-31 Олга БАХОВА Метод и устройство за изпридане на прежда от щапелни влакна
CN105200581A (zh) * 2015-09-25 2015-12-30 厦门市优家品日用品有限公司 一种自动控制且可降噪的纺织用气流搓捻装置
CN105088435A (zh) * 2015-09-25 2015-11-25 杨田花 一种纺织用气流搓捻装置
CN105133101A (zh) * 2015-09-25 2015-12-09 衢州市鸿奥五金有限公司 一种带散热风扇的纺织用气流搓捻装置
CN105088439A (zh) * 2015-09-25 2015-11-25 郑世浦 一种可防尘且带过滤网的纺织用气流搓捻装置
CN105200580A (zh) * 2015-09-25 2015-12-30 泉州市港生利来进出口贸易有限公司 一种由升降电机驱动升降的纺织用气流搓捻装置
CN105088437A (zh) * 2015-09-25 2015-11-25 郑世浦 液压驱动升降且可更换过滤网的纺织用气流搓捻装置
CN105155052A (zh) * 2015-09-25 2015-12-16 嘉兴市强达数控设备有限公司 一种纺织用气流搓捻装置控制系统
CN105155051A (zh) * 2015-09-25 2015-12-16 晋江市正锋机械有限公司 一种可调速的移动式纺织用气流搓捻装置
ITUA20163011A1 (it) * 2016-04-29 2017-10-29 Savio Macch Tessili Spa Dispositivo di filatura di tipo air-jet
ITUA20163006A1 (it) * 2016-04-29 2017-10-29 Savio Macch Tessili Spa Dispositivo di filatura di tipo air-jet
IT201600070676A1 (it) 2016-07-07 2018-01-07 Savio Macch Tessili Spa Dispositivo di filatura di tipo air-jet
DE102017116893A1 (de) * 2016-07-28 2018-02-01 Rieter Ingolstadt Gmbh Fadenführungseinheit, Offenend-Spinnmaschine und Verfahren zum Betreiben einer Spinnstelle
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Also Published As

Publication number Publication date
US20080276594A1 (en) 2008-11-13
DE102005045703A1 (de) 2007-03-22
WO2007033717A1 (fr) 2007-03-29
JP2009509051A (ja) 2009-03-05
CN101268222A (zh) 2008-09-17

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