EP3309281B1 - Faserführungselement für eine spinndüse einer luftspinnmaschine sowie verfahren zum betrieb einer luftspinnmaschine - Google Patents

Faserführungselement für eine spinndüse einer luftspinnmaschine sowie verfahren zum betrieb einer luftspinnmaschine Download PDF

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Publication number
EP3309281B1
EP3309281B1 EP17194784.9A EP17194784A EP3309281B1 EP 3309281 B1 EP3309281 B1 EP 3309281B1 EP 17194784 A EP17194784 A EP 17194784A EP 3309281 B1 EP3309281 B1 EP 3309281B1
Authority
EP
European Patent Office
Prior art keywords
channel
spinning
fiber guide
injection
air
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.)
Active
Application number
EP17194784.9A
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German (de)
English (en)
French (fr)
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EP3309281A1 (de
Inventor
Simon-Moritz Funke
Thomas Landsinger
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
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Maschinenfabrik Rieter AG
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Publication of EP3309281A1 publication Critical patent/EP3309281A1/de
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Publication of EP3309281B1 publication Critical patent/EP3309281B1/de
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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
    • D01H15/00—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing
    • D01H15/002—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing for false-twisting spinning machines

Definitions

  • the present invention relates to a fiber guide member for a spinning nozzle of an air-spinning machine, which serves to produce a yarn from a fiber structure, wherein the fiber guide member has an outer surface which serves the abutment against a counter surface of the spinneret to thereby fix the fiber guide element on or in the spinneret can, and wherein the fiber guide element has a fiber guide channel having an inlet opening and an outlet opening, which serves to guide the fiber guide element passing through the fiber guide channel fiber strand on entry into a vortex chamber of the spinneret during operation of the spinneret.
  • an air spinning machine with a spinning station which serves to produce a yarn from a fiber structure
  • the spinning station comprises at least one spinneret with an internal vortex chamber, the spinneret having directed into the vortex chamber air nozzles, with their help within the vortex chamber a vortex air flow is generated when the air nozzles are subjected to compressed air
  • the spinneret comprises at least partially extending into the vortex chamber Garn avoirselement with an inlet mouth and a subsequent spin direction withdrawal channel for the yarn
  • the spinneret an inlet opening for the operation in the spinning station in a fiber guide having a spinning direction in the vortex chamber incoming fiber strand, and wherein extending between the inlet opening and the vortex chamber, a fiber guide channel for guiding the entering into the spinneret fiber assembly.
  • the invention relates to a method for operating an air spinning machine with at least one swirl chamber having a spinneret, wherein the swirl chamber during a spinning process, a fiber strand is fed via a adjoining an inlet opening of the spinneret fiber guide channel in a spinning direction, wherein the fiber structure within the swirl chamber and in An area of an inlet mouth of a yarn forming member projecting into the swirling chamber is rotated by air flow to form a twisted yarn from the fiber strand, and the spinning process resumes after interruption thereof by a piecing following the interruption during which Among other things, a yarn end of the yarn previously produced by the spinneret is fed back against the spinning direction by the spinneret and then superposed with an end portion of the fiber composite.
  • the yarn end After a yarn break on an air-spinning machine, it is customary to return the yarn end of the yarn produced before the yarn break within the spinning station of the air-spinning machine, contrary to the actual spinning direction, through the spinning station.
  • the yarn end first passes through the draw-off channel of a yarn-forming element, on the outer surface of which, during the actual spinning process, through a targeted air flow, a rotation of the fed fiber sliver and thus yarn formation takes place.
  • the yarn end After the yarn end has left the discharge duct through an opening arranged on the front side of the yarn formation element, which serves as an inlet mouth for the yarn produced during spinning, it finally has to pass through the so-called fiber guide element.
  • the described return operation of the yarn end into the region in front of the spinneret is preferably carried out with the aid of an air flow which is generated via an injection nozzle which opens out into the draw-off channel of the yarn-forming element and leaves the yarn-forming element via the inlet mouth.
  • Such a solution can be, for example, the DE 10 2008 050 874 A1 remove. Even if the return of the yarn end with the help of said air flow already works, failed attempts can not be completely ruled out.
  • EP 2 573 219 A2 a fiber guiding element, a spinning station of an air spinning machine and a method for operating an air spinning machine according to the preambles of the independent claims 1, 6 and 11.
  • the object of the present invention is therefore to improve the return of a yarn end.
  • the core of the invention lies in forcing the yarn end, during its return, counter to the spinning direction, through the inlet opening of the spinneret, which may for example be formed by an inlet opening of said fiber guiding element.
  • the fiber guide channel which adjoins the inlet opening in the spin direction, opposite to the spinning direction flows through.
  • the air flow in this case supports the movement of the yarn end through the spinneret and ensures that it is passed during the return not only through the trigger channel of Garn Strukturselements but also through the fiber guide channel in the region of the inlet opening of the spinneret.
  • the inlet opening of the Spinneret usually formed by the inlet opening of the fiber guide channel.
  • the fiber guide element has an injection channel, with the aid of which within the fiber guide channel an air flow is generated, which extends from an outlet opening of the fiber guide channel in the direction of said inlet opening, as soon as the injection channel is pressurized with compressed air
  • the compressed air is introduced from a side facing away from the fiber guide channel in the injection channel.
  • the air flow thus has a direction which is opposite to the direction of movement of the fiber strand entering the spinneret during the spinning process (so-called spinning direction).
  • the end of the yarn may be the end of the yarn produced before the interruption of the spinning process. It is also conceivable that the yarn is shortened during the piecing process a piece and thus creates a new yarn end.
  • the injection channel is inclined counter to the spinning direction, so that the air emerging from the injection channel already has a movement component which is directed counter to the spinning direction.
  • the injection channel opens into the fiber guide channel.
  • the air outlet of the injection channel is therefore located in particular in the region of an inner wall of the fiber guide channel.
  • the air outlet is placed at a location that is not contacted by fibers of the fiber composite during the spinning process.
  • the injection channel in the region of an end face of the fiber guide element surrounding the inlet opening of the fiber guide channel out of this exit.
  • the air outlet is thus in the region of said end face, wherein said air outlet is arranged on the side of the spinneret facing the drafting device (provided that the air-spinning machine having the fiber guiding element comprises a drafting device).
  • the air flow generated by the injection channel does not flow through the fiber guide channel. Rather, the air flow generated due to the Venturi principle in the region of the inlet opening a negative pressure, which eventually leads to the desired air flow from the vortex chamber of the spinneret in the direction of the inlet opening of the fiber guide element.
  • the vortex air flow can be formed, for example, by air guide sections, which direct the air discharged from the injection channel to a vortex path.
  • the injection channel has a longitudinal axis which represents in a cross section of the fiber guide element a tangent or secant of the fiber guide channel in the region of an air outlet of the injection channel defining the inner wall of the fiber guide channel.
  • the injection channel does not enter the extraction channel radially. Rather, the entry occurs such that within the fiber guide channel said vortex air flow is formed when the injection channel is pressurized with compressed air.
  • a radial course of the injection channel relative to a longitudinal axis of the fiber guiding element is also conceivable.
  • the fiber guiding element can also have a plurality, preferably two or three, injection channels, wherein each of the injection channels can have one or more of the features mentioned above or below.
  • the fiber guiding element could also comprise differently shaped injection channels. In any case, it is advantageous if the injection channel or channels are part of the fiber guiding element.
  • the injection channel is limited by an insert of the fiber guide element and / or a groove.
  • the injection channel can also be formed by a bore in a wall of the fiber guide element, this embodiment has the advantage that the groove can be produced by milling.
  • the insert eventually covers the groove in the direction of the fiber guide channel, so that the injection channel is limited by the groove and the insert.
  • the injection channel is not part of a separate fiber guiding element.
  • the fiber guide channel it would be conceivable for the fiber guide channel to be formed by a wall of the spinneret which, in addition to the fiber guide channel, also surrounds other sections of the spinneret, for example the vortex chamber.
  • the above object can be achieved, namely when the spinneret has at least one injection channel in the region of the fiber guide channel, with the aid of which within the fiber guide channel an air flow is generated, which extends from the swirl chamber in the direction of the inlet opening of the spinneret, as soon as the injection channel is pressurized with compressed air.
  • the injection channel is present as a bore in said wall.
  • the spinneret has a fiber guide element according to the previous and / or subsequent description, wherein the fiber guide channel and the injection channel at least sections are part of the fiber guide element. It is thus also possible for first sections of the fiber guide channel and / or first sections of the injection channel or channels to be formed by the fiber guide element and second sections of the fiber guide channel and / or second sections of the injection channel (s) through a remaining section of the spinneret.
  • the spinneret has a plurality of injection channels (which can be formed, for example, by a fiber guiding element of the spinneret) which are each connected to a common air inlet of the spinneret via one or a common compressed air channel.
  • the compressed air duct can be a bore or a channel created by milling, which is subsequently covered by a cover element in order to form a closed compressed air duct.
  • the air inlet of the spinneret may also comprise a channel section or else be present only as a connection which can be connected to a compressed air supply to a spinning mill or to the spinning station having the spinneret.
  • the yarn formation element has at least one injection nozzle which opens into the extraction channel. If compressed air is applied to the injection nozzle, an air flow is created which emerges against the spin direction from the inlet mouth of the yarn formation element into the swirl chamber.
  • the spinning direction is the direction in which the yarn moves through the extraction channel during the spinning process.
  • the injection nozzle is therefore also suitable for effecting or assisting the return of a yarn end during a piecing process.
  • the yarn is moved by means of the air flow generated by the injection nozzle through the Garn avoirselement in the swirl chamber and with the aid of the injection channel generated air flow from the swirl chamber through the fiber guide channel and ultimately into the area outside the spinneret.
  • the spinning station also has a valve by means of which the introduction of compressed air into the injection channel and / or the injection nozzle can be controlled and / or regulated. On the position of the valve can thus be determined whether at a certain time of piecing the injection channel, the injection nozzle or both are pressurized with compressed air.
  • the threading process of the yarn end through the spinneret can be improved, in particular accelerated, with regard to its success rate.
  • the invention relates to a method for operating an air-spinning machine spinning a yarn from a fiber composite fed to the spinneret of the air-spinning machine during a spinning operation (of course, the air-spinning machine may have a multiplicity of corresponding spinnerets).
  • the invention proposes that during the return of the yarn end within the fiber guide channel an air flow is generated which extends from the swirl chamber in the direction of the inlet opening of the spinneret, wherein for generating said air flow at least one in the region of the fiber guide channel (for example, in the interior of a fiber guide element or in the region of the inlet opening) arranged injection channel is used, which is at least temporarily subjected to compressed air during the return of the yarn end.
  • a negative pressure is generated in the region of the swirl chamber, which sucks the Garnende element coming from the Garnende element and finally moved through the fiber guide channel.
  • the air flow can be generated continuously or pulsed.
  • the Garnticianselement has at least one injection nozzle, which opens into the discharge channel.
  • the injection nozzle is at least temporarily subjected to compressed air during the piecing process, wherein the compressed air emerges counter to the spinning direction from the inlet mouth of Garn avoirselements.
  • the yarn end is thus also moved within the discharge channel by means of a force acting in the direction of the inlet opening of the spinneret air flow.
  • This air flow can also be generated continuously or in pulses over a certain period of time.
  • the injection nozzle and the injection channel are in communication with one or a common compressed air channel, wherein the compressed air channel or the compressed air channels have a valve, with the aid of the introduction of compressed air into the injection channel and / or the injection nozzle during the Piecing process is controlled and / or regulated.
  • the valve In addition to the regulation and / or control of the air pressure of each introduced compressed air, it is also possible with the help of the valve, the temporal sequence of the introduction of compressed air into the injection channel or the injection nozzle to influence.
  • the injection channel is subjected to compressed air during the piecing process later than the injection nozzle.
  • the yarn end is initially moved by the air flow within the extraction channel before it reaches the effective region of the air flow generated by the injection channel.
  • this energy can be saved, since the injection channel is only then acted upon with compressed air when the yarn reaches the region of the fiber guide channel and leaves the discharge channel.
  • FIG. 1 shows two basically identically constructed spinning stations of an air-spinning machine, the individual, described below, components can also be part of the spinning station according to the invention.
  • the spinning station comprises in each case a drafting system comprising a plurality of drafting rollers 29 for refining a fiber composite 19 (not all of the drafting rollers 29 shown identically are provided with a reference symbol). Further, a spinneret 2 is present, wherein the spinneret 2 of the spinning unit shown on the left is shown partially cut.
  • the spinneret 2 has an inlet opening 22, via which the fiber structure 19 can enter the spinneret 2, wherein the inlet opening 22 is preferably formed by the inlet opening 6 of a separate fiber guide element 1.
  • the fiber guide element 1 in turn has an outer surface 3 (see also FIG. 2 showing a section of a possible embodiment of a spinneret 2 of a spinning station according to the invention), via which it bears against a corresponding mating surface 4 of the spinneret 2.
  • the fiber guide element 1 has a fiber guide channel 5, which extends through the fiber guide element 1, begins at said inlet opening 6 and ends in the region of, an inner vortex chamber 8 facing outlet opening 7.
  • the fiber guide channel 5 is used to guide the fiber assembly 19 when entering the vortex chamber 8.
  • the fiber structure 19 is exposed during the spinning process of a vortex air flow, which is generated by projecting into the vortex chamber 8 air nozzles 20 when this via a spinning air duct 31 of the spinneret 2 with Compressed air are applied (see FIG. 2 ; in FIG. 1 the air nozzles 20 are not shown).
  • the invention proposes that the spinneret 2 or the fiber guide element 1 has at least one injection channel 9, which is acted on with compressed air during the piecing process.
  • a corresponding injection channel 9 is for example in FIG. 2 is shown and communicates with a compressed air channel 23, via which it can be supplied with compressed air, that is acted upon, is.
  • the injection channel 9 is directed in the direction of the inlet opening 6 of the fiber guide element 1 in order to effect an air flow which moves the yarn end 32 from the outlet opening 7 through the fiber guide channel 5 to the inlet opening 6.
  • the yarn formation element 25 preferably has an injection nozzle 26, via which compressed air can likewise be introduced during the piecing process in order to move the yarn end 32 against the spin direction S through the extraction channel 21.
  • the compressed air also comes from a compressed air channel 23.
  • the two said compressed air channels 23 are connected to a common air inlet 15 of the spinneret 2.
  • a valve 24 may be arranged in each of the compressed air channels 23 or in the region of a connection point of the two compressed air channels 23, a valve 24 may be arranged.
  • it could be a three-way valve, so that either the injection nozzle 26 or the injection channel 9 or both can be supplied with compressed air.
  • the air outlet 12 of the injection channel 9 is arranged in the region of an inner wall 13 of the fiber guide channel 5, which is not in contact with fibers during the spinning process in order to prevent entanglement of the fibers.
  • this is the left side of the fiber guide channel 5, since the fibers of the fiber composite 19 due to the lateral offset of the fiber guide channel 5 and the discharge channel 21 on the injection channel 9 opposite side of the inner wall 13 past.
  • the fiber guiding element 1 can also have a plurality of injection channels 9, which lie in the interior of the fiber guiding element 1 and are therefore shown by dashed lines.
  • injection channels 9 may be arranged in mirror image relative to a plane extending perpendicular to the image plane, it is the same conceivable that they, as in FIG. 3b shown entering the fiber guide channel 5 in such a way that they generate a vortex air flow within the fiber guide channel 5.
  • injection channels 9 starting from the outer surface 3 of the respective fiber guide element 1 and with respect to the image plane run down until they finally open in the region of an air outlet 12 in the fiber guide channel 5.
  • the only in FIG. 3a shown longitudinal axes 11 of the respective injection channels 9 can in this case with respect to the line which limits the fiber guide channel 5 in the plan view shown, form a secant or tangent.
  • the injection channel 9 does not necessarily have to be present as a bore. Rather, this can also be limited by a groove 17 of the fiber guide element 1 on the one hand and an insert 16 on the other hand, wherein the insert 16 may be glued, for example.
  • a plurality of injection channels 9 may also be present in this case, which may be limited by the same insert 16 and different grooves 17.
  • the mentioned figures show that the injection channel or channels 9 can also escape in the region of that end face 10 of the fiber guiding element 1 which has the inlet opening 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP17194784.9A 2016-10-05 2017-10-04 Faserführungselement für eine spinndüse einer luftspinnmaschine sowie verfahren zum betrieb einer luftspinnmaschine Active EP3309281B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016118858.1A DE102016118858A1 (de) 2016-10-05 2016-10-05 Faserführungselement für eine Spinndüse einer Luftspinnmaschine sowie Verfahren zum Betrieb einer Luftspinnmaschine

Publications (2)

Publication Number Publication Date
EP3309281A1 EP3309281A1 (de) 2018-04-18
EP3309281B1 true EP3309281B1 (de) 2018-12-19

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EP17194784.9A Active EP3309281B1 (de) 2016-10-05 2017-10-04 Faserführungselement für eine spinndüse einer luftspinnmaschine sowie verfahren zum betrieb einer luftspinnmaschine

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EP (1) EP3309281B1 (zh)
CN (1) CN107916474B (zh)
DE (1) DE102016118858A1 (zh)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019103271A1 (de) * 2019-02-11 2020-08-13 Maschinenfabrik Rieter Ag Spinndüse für eine Luftspinnmaschine sowie Verfahren zum Öffnen einer solchen
DE102019120592A1 (de) * 2019-07-30 2021-02-04 Maschinenfabrik Rieter Ag Verfahren zum Anspinnen einer Spinndüse einer Luftspinnmaschine sowie Luftspinnmaschine
JP2021042508A (ja) * 2019-09-13 2021-03-18 村田機械株式会社 空気紡績装置及び空気紡績機
CN112921466B (zh) * 2021-01-26 2024-07-09 江苏柯能新材料有限公司 一种用于涤纶工业丝纤维膨化的喷嘴组件
CN117344424B (zh) * 2023-11-30 2024-03-08 广东荣昌纺织实业有限公司 一种内部多段式高成纱强度喷气涡流纺工艺及其应用

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CS266666B1 (en) * 1987-04-16 1990-01-12 Havranek Zdenek Equipment for bundled yarn production in pneumatic spinning nozzle
JPH0653980B2 (ja) * 1987-10-28 1994-07-20 村田機械株式会社 紡績装置
JPH0261113A (ja) * 1988-08-24 1990-03-01 Murata Mach Ltd 紡績糸の製造装置
JPH03241017A (ja) * 1990-02-15 1991-10-28 Murata Mach Ltd 精紡機
US20020152739A1 (en) * 2000-12-22 2002-10-24 Maschinenfabrik Rieter Ag Spinning device
DE10333411A1 (de) * 2003-07-15 2005-02-03 Wilhelm Stahlecker Gmbh Vorrichtung zum Herstellen eines gesponnenen Fadens aus einem Stapelfaserverband
US6991397B2 (en) * 2003-11-07 2006-01-31 Modular Systems, Inc. Dowel fastener and joints including same
DE102008050874A1 (de) 2008-09-29 2010-04-01 Wilhelm Stahlecker Gmbh Luftdüsenspinnaggregat mit spindelförmigem Bauteil
CN202030880U (zh) * 2009-10-08 2011-11-09 拉卡什米机械厂有限公司 用于喷气纺纱的改进设备
WO2012164435A1 (en) * 2011-05-31 2012-12-06 Lakshmi Machine Works Ltd. An improved piecing mechanism in an air spinning machine
DE102011053810A1 (de) * 2011-09-21 2013-05-16 Maschinenfabrik Rieter Ag Garnbildungselement für eine Spinnstelle einer Luftspinnmaschine sowie Verfahren zur Vorbereitung eines Anspinnvorgangs an einer Luftspinnmaschine
DE102012108380A1 (de) * 2012-06-19 2013-12-19 Maschinenfabrik Rieter Ag Luftspinnmaschine und Verfahren zum Betrieb derselben
DE102014112360A1 (de) * 2014-08-28 2016-03-03 Maschinenfabrik Rieter Ag Garnbildungselement für eine Spinndüse einer Luftspinnmaschine, Luftspinnmaschine sowie Verfahren zum Betrieb einer solchen

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Also Published As

Publication number Publication date
CN107916474A (zh) 2018-04-17
CN107916474B (zh) 2021-08-31
EP3309281A1 (de) 2018-04-18
DE102016118858A1 (de) 2018-04-05

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