EP2980285B1 - Spinnstelle einer luftspinnmaschine sowie betrieb einer solchen - Google Patents

Spinnstelle einer luftspinnmaschine sowie betrieb einer solchen Download PDF

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Publication number
EP2980285B1
EP2980285B1 EP15175942.0A EP15175942A EP2980285B1 EP 2980285 B1 EP2980285 B1 EP 2980285B1 EP 15175942 A EP15175942 A EP 15175942A EP 2980285 B1 EP2980285 B1 EP 2980285B1
Authority
EP
European Patent Office
Prior art keywords
additive
yarn
spinning
fiber assembly
during
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.)
Not-in-force
Application number
EP15175942.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2980285A3 (de
EP2980285A2 (de
Inventor
Markus Kübler
Gernot SCHÄFFLER
Martin Widmann
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 EP2980285A2 publication Critical patent/EP2980285A2/de
Publication of EP2980285A3 publication Critical patent/EP2980285A3/de
Application granted granted Critical
Publication of EP2980285B1 publication Critical patent/EP2980285B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/30—Moistening, sizing, oiling, waxing, colouring, or drying yarns or the like as incidental measures during spinning or twisting
    • D01H13/306—Moistening, sizing, oiling, waxing, colouring, or drying yarns or the like as incidental measures during spinning or twisting by applying fluids, e.g. steam or oiling liquids
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H2700/00—Spinning or twisting machines; Drafting devices
    • D01H2700/21—Piecing or cleaning in spinning mules

Definitions

  • the present invention relates to a method for operating an air spinning machine, wherein the air spinning machine has at least one spinning station with a spinneret for producing a yarn, wherein the spinneret during normal operation of the spinning station, a fiber strand is fed via an inlet and in a predetermined transport direction, wherein the fiber strand Within a vortex chamber of the spinneret with the aid of a vortex air flow receives a rotation, so that from the fiber strand a yarn is formed, which finally leaves the spinneret via an outlet and is wound by means of a winding device on a sleeve, wherein after an interruption of the yarn production, a piecing process is carried out, in which a coil-side yarn end moves opposite to the transport direction through the spinneret, superimposed after passing through the spinneret with one end of the fiber strand and together with this via the inlet into the spinneret is brought, and after completion of said steps of the piecing process, the production of the yarn is continued by recording the
  • an air-spinning machine which has at least one spinning station with a spinneret for producing a yarn from a fiber strand fed to the spinneret, wherein the spinneret has an inlet for the fiber structure, an internal swirl chamber, a yarn forming element projecting into the swirl chamber and an outlet for the Having yarn produced in the interior of the vortex chamber by means of a vortex air flow.
  • Generic air-jet spinning machines are used to produce a yarn (as it is for example in the EP 1 718 791 A1 described) from an elongated fiber structure by means of a vortex air flow generated by corresponding air nozzles within the vortex chamber.
  • the outer fibers of the fiber structure are wound around the inner fibers (core) in the region of the inlet mouth of the generally spindle-shaped yarn formation element, so that a stable yarn is produced as a result, which is finally removed from the vortex chamber via the extraction channel and onto a sleeve with the aid of the aforementioned winding device can be wound up.
  • the yarn end and with it the end of the fiber strand is moved by switching on the air nozzles and by starting the winding device into the interior of the vortex chamber and exposed there to the vortex air flow (which at this time already the fiber strand supplying device, preferably through one of the spinneret in Transport Direction upstream drafting is formed, was taken into operation or to promote the fiber structure in the direction of the inlet of the spinneret).
  • the connecting or overlapping area between the yarn end and the end of the fiber strand finally passes the inlet mouth of the spindle.
  • the spinning process is now continued as usual, ie the spinning unit is operated again in normal operation and produces a yarn.
  • a corresponding piecing process is for example in the JP H11 43829 A described.
  • the object of the present invention is therefore to improve the piecing process compared with the prior art and to propose an air spinning machine for carrying out such a piecing process.
  • the method is characterized in that during the piecing process at least temporarily additive is applied to the end of the fiber composite (which is overlapped with the yarn end or has already been brought into contact with this) is applied (the addition of additive to a ring spinning machine is otherwise in of the CN 102 226 303 A described; the additive addition in the context of texturing a yarn is the US 3 478 398 A refer to).
  • the end of the fiber composite which is overlapped during the piecing process with said yarn end and is jointly introduced or sucked into the spinneret, wetted with an additive.
  • the additive can be water or an aqueous solution which may contain one or more additional substances.
  • the addition of the additive during the piecing operation stabilizes the overlapping area between the yarn end and the end of the fiber strand so as to provide a particularly stable bond area between the yarn ends Sections is created. A loosening of the connection area during the piecing process or the subsequent normal operation or the subsequent further processing of the yarn is thereby almost impossible.
  • connection region is positively influenced by the application of the additive, so that the connection region in the finished yarn is virtually no longer recognizable.
  • the additive may be sprayed onto the end of the fiber composite.
  • the additive storage may be designed depending on the choice of additive and may be formed for example by a tank, a distribution system or the spinning station associated supply cartridges.
  • one or more additive supply lines are provided, via which the additive reservoir is in contact with an additive delivery, the latter being able to be formed for example by a hollow needle, a spray head or an additive outlet opening of a channel section.
  • the application of the additive should take place at a stage of the piecing process in which the end of the fiber dressing is already moved in the direction of the spinneret in order to evenly add additive to the fiber structure.
  • the additive brings advantages when the additive is applied to the end of the fiber strand after being overlaid with the yarn end.
  • the additive addition is started is, as soon as or shortly after the fiber strand, for example by means of said drafting, is supplied in the direction of the inlet of the spinneret.
  • the connection area between the yarn end and the end of the fiber composite is thereby strengthened before it reaches the area of the vortex air flow within the vortex chamber.
  • the additive is applied in the region of the inlet or, viewed in the transport direction, before the inlet of the spinneret onto the end of the fiber composite.
  • the additive takes place in the region between the inlet of the spinneret and a device which delivers the fiber structure, for example a drafting device located upstream of the spinneret.
  • the additive-provided end of the fiber dressing does not come in contact with the fiber dressing delivery device, thus avoiding potential complications associated therewith.
  • the additive should therefore be applied in the immediate area before the inlet of the spinneret on the end of the fiber dressing.
  • the fiber guide element can have an additive outlet opening arranged in the interior thereof, which opens into a passageway through which the said connection region and the subsequently delivered fiber structure pass into the swirl chamber of the spinneret.
  • the volume flow of the added additive during the piecing process at least temporarily, an amount between 0.001 ml / min and 2.0 ml / min, preferably between 0.01 ml / min and 1.0 ml / min and / or when the mass flow of the supplied Additive during the piecing process at least temporarily an amount between 0.001 g / min and 2.0 g / min, preferably between 0.01 g / min and 1.0 g / min has. While a higher volume or mass flow could cause sticking of the portions of the spinning station in contact with the connection region, said region ensures a reliable connection of the yarn end and the end of the fiber assembly.
  • the volume or mass flow of the additive is regulated during additive addition by means of at least one valve, the valve being opened and closed during operation at least once per second, so that the additive supplied to the valve passes through the valve in a pulse-like manner ,
  • a valve is thus not continuously flowed through by additive.
  • the additive stream of a plurality of smallest droplets or additive units (if no liquid, but a gas or a solid is used) composed, which are generated by the rapid opening and closing and leave the valve.
  • volume or mass flow of the added additive during the piecing process is at least temporarily higher than during the normal operation of the spinning station following the piecing process.
  • the exact value can be selected depending on the properties of the fiber composite and / or its feed rate into the spinning station and / or the withdrawal speed of the yarn from the spinning station and can therefore vary depending on the application.
  • the volume or mass flow of the added additive during the piecing process is at least temporarily reduced compared to an initial amount, the reduction taking place in particular at the end of the piecing process. This makes it possible to gradually reduce the amount of added additive during the piecing process to the amount desired during the subsequent normal operation of the spinning station.
  • the reduction of the volume or mass flow of the added additive takes place continuously.
  • the reduction may be abrupt, gradual or even gradual (ie, uniform), with, for example, a linear decrease in the amount of additive delivered to the end of the fiber composite being conceivable.
  • the amount of added additive should, at the latest, be reduced to the amount intended for normal operation if the connecting region between the yarn end and the end of the fiber composite has passed the additive outlet opening of the additive supply, so that the following fiber structure is already provided with a smaller amount of additive the said connection area.
  • the air-jet spinning machine is characterized in that the at least one spinning station of the air-spinning machine (it can of course also be present several spinning stations) is associated with an additive supply, by means of which an additive can be applied to an present after an interruption of yarn production end of the fiber assembly.
  • the additive supply which should comprise at least one additive reservoir and an additive outlet opening connected to it in the area of the spinneret, is operatively connected to a control unit which is designed to initiate a piecing process according to the above or subsequent description during an interruption of the yarn production at least temporarily additive is applied to the end of the fiber dressing.
  • the application of the additive may take place according to individual or all aspects described above or below, wherein the spinning station may in particular have the correspondingly described physical characteristics.
  • FIG. 1 shows a section of a spinning station of an air-spinning machine according to the invention (wherein the air-spinning machine can of course have a plurality of, preferably adjacent to each other, spinning stations).
  • the air-spinning machine can comprise a drafting system 13 with a plurality of drafting rollers 12, which is supplied with a fiber structure 3, for example in the form of a relined conveyor belt.
  • the spinning station shown comprises a in FIG. 2 spinneret 1 with an internal vortex chamber 5, in which the fiber structure 3 or at least a part of the fibers of the fiber composite 3 after passing through an inlet 4 of the spinneret 1 is provided with a rotation (the exact operation of the spinning station will be described in more detail below ).
  • the air-spinning machine may include a pair of delivery rollers downstream of the spinneret 1 and two take-off rollers 14 and a winding device 7 connected downstream of the take-off roller pair for winding up the yarn 2 leaving the spinning station onto a sleeve.
  • the spinning station according to the invention need not necessarily have a drafting system 13.
  • the pair of take-off rollers is not mandatory or can be replaced by an alternative take-off unit.
  • the spinning station shown generally works by an air spinning process.
  • the fiber structure 3 is guided into the swirl chamber 5 of the spinneret 1 in a transport direction T via a fiber guide element 15 provided with an inlet opening forming said inlet 4.
  • a rotation ie at least part of the free fiber ends of the fiber composite 3 is detected by a vortex air flow which is produced by air nozzles 18 arranged correspondingly in a vortex chamber wall 5 surrounding the vortex chamber 5.
  • the air nozzles 18 are provided with compressed air (eg annular air distribution 17 connected to an air supply line 16) be fed.
  • a part of the fibers is in this case pulled out of the fiber structure 3 at least a little bit and wound around the tip of a projecting into the swirl chamber 5 Garnsentelements 10.
  • the fiber structure 3 is drawn off the spinneret 1 through an inlet opening 29 of the yarn formation element 10 via a withdrawal channel 22 located within the yarn formation element 10 and finally via an outlet 6, the free fiber ends in the direction of the inlet opening 29 become finally pulled and loop as a so-called Umwindefasern to the centrally extending core fibers - resulting in the desired rotation having yarn 2.
  • the introduced via the air nozzles 18 compressed air leaves the spinneret 1 finally via the outlet channel 22 and a possibly existing air outlet 19, if necessary can be connected to a vacuum source.
  • the air nozzles 18 it should also be mentioned as a precautionary measure at this point that they should generally be oriented so that the exiting air jets are rectified in order to jointly produce a rectified air flow with a sense of rotation.
  • the individual air nozzles 18 are arranged in this case rotationally symmetrical to one another and open tangentially into the swirl chamber 5.
  • the yarn production is interrupted by the control unit 25, so that a coil-side yarn end 23 is formed.
  • the yarn end 23 may be on the surface after the interruption of yarn production the coil located in the winding device 7 or in the area between the winding device 7 and the spinneret 1, preferably between the outlet 6 thereof and the take-off rolls 14 are located (see FIG. 3 ).
  • unwanted yarn breaks may occur during yarn production, which likewise result in a corresponding yarn end 23 and in the region of the correspondingly stopped drafting system 13 coming to an end 24 of the fiber composite 3.
  • said yarn end 23 In order to be able to resume the yarn production, ie the normal operation of the respective spinning station, said yarn end 23 must be connected to the end 24 of the fiber structure 3. For this purpose, it is provided that the yarn end 23 is guided against the transport direction T through the spinneret 1, for which purpose the spool 7 located in the spool is driven backwards to release a corresponding amount of yarn.
  • the yarn end 23 or a yarn end 23 which has been newly created by removing the yarn section having the yarn defect is conveyed at this stage by means of mechanical or pneumatic means into the region of the outlet 6 of the spinneret 1 and is sucked into the region of the outlet 6 of the spinneret 1 with the aid of a negative pressure prevailing in the discharge channel 22.
  • the exit side, the yarn end 23 are fixed, Draft rollers 12, the take-off rollers 14 and the winding device 7 are put into operation again, so that the yarn end 23 is moved in the transport direction T.
  • the remaining drafting rollers 12 are set in motion again, wherein the beginning of their rotation and the corresponding speed are adjusted so that the end 24 of the fiber composite 3 comes into overlapping contact with the yarn end 23 and together with this in the spinneret 1 can be recovered.
  • the spinning station has an additive supply 11, which preferably comprises one or more additive reservoirs 21 (eg in the form of corresponding pressure vessels) providing an additive 8 and one or more, preferably at least partially flexible, additive supply lines 20 via which the respective additive reservoirs 21 is in fluid communication with an arranged in the region of the spinneret 1 additive outlet opening 26 (with regard to possible additives 8 is made to the previous description).
  • the additive outlet opening 26 is preferably arranged in the region of the inlet 4 of the spinneret 1 or of the fiber guide element 15 mentioned.
  • the dispensing should take place at a point which is passed by the connecting region 27 "yarn end 23 - end 24 of the fiber composite 3" in order to consolidate or stabilize this region by the additive 8.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Treatment Of Fiber Materials (AREA)
EP15175942.0A 2014-07-30 2015-07-08 Spinnstelle einer luftspinnmaschine sowie betrieb einer solchen Not-in-force EP2980285B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH01167/14A CH709953A1 (de) 2014-07-30 2014-07-30 Verfahren zum Betrieb einer Luftspinnmaschine.

Publications (3)

Publication Number Publication Date
EP2980285A2 EP2980285A2 (de) 2016-02-03
EP2980285A3 EP2980285A3 (de) 2016-06-08
EP2980285B1 true EP2980285B1 (de) 2018-12-26

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EP15175942.0A Not-in-force EP2980285B1 (de) 2014-07-30 2015-07-08 Spinnstelle einer luftspinnmaschine sowie betrieb einer solchen

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US (1) US9719192B2 (zh)
EP (1) EP2980285B1 (zh)
JP (1) JP6621608B2 (zh)
CN (1) CN105316813B (zh)
CH (1) CH709953A1 (zh)

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CN112176573A (zh) * 2020-08-18 2021-01-05 新昌县欧赛机械有限公司 一种紧密纺纱线的给湿装置
CN112746361B (zh) * 2020-12-16 2023-06-02 卓郎（江苏）纺织机械有限公司 一种细纱机的接头操作方法及细纱机
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EP2980285A3 (de) 2016-06-08
EP2980285A2 (de) 2016-02-03
JP2016047980A (ja) 2016-04-07
CH709953A1 (de) 2016-02-15
CN105316813A (zh) 2016-02-10
CN105316813B (zh) 2019-01-11
US9719192B2 (en) 2017-08-01
JP6621608B2 (ja) 2019-12-18
US20160032498A1 (en) 2016-02-04

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