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EP3652368B1 - Procédé pour faire fonctionner un arrangement de filage à jet d'air - Google Patents

Procédé pour faire fonctionner un arrangement de filage à jet d'air Download PDF

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Publication number
EP3652368B1
EP3652368B1 EP18740594.9A EP18740594A EP3652368B1 EP 3652368 B1 EP3652368 B1 EP 3652368B1 EP 18740594 A EP18740594 A EP 18740594A EP 3652368 B1 EP3652368 B1 EP 3652368B1
Authority
EP
European Patent Office
Prior art keywords
thread
air
channel
section
spinning
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
EP18740594.9A
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German (de)
English (en)
Other versions
EP3652368A2 (fr
Inventor
Michael Mohr
Heinz-Josef Peuker
Chandrassekaran Seshayer
Ralf Siewert
Joachim SOBKOWIAK
Paul Straaten
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.)
Saurer Spinning Solutions GmbH and Co KG
Original Assignee
Saurer Spinning Solutions GmbH and Co KG
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 Saurer Spinning Solutions GmbH and Co KG filed Critical Saurer Spinning Solutions GmbH and Co KG
Publication of EP3652368A2 publication Critical patent/EP3652368A2/fr
Application granted granted Critical
Publication of EP3652368B1 publication Critical patent/EP3652368B1/fr
Active 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H51/00—Forwarding filamentary material
    • B65H51/16—Devices for entraining material by flow of liquids or gases, e.g. air-blast devices
    • 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
    • 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 invention relates to a method for operating an air spinning device after a spinning interruption.
  • the air-jet spinning device is preceded by a drafting system for drafting a sliver in the running direction of the sliver, and downstream is a thread take-off device, which can be driven by a single motor, for taking off a thread spun by means of the air-jet spinning device.
  • the invention relates to a thread guide channel for arrangement between a spinning device and a winding device of a textile machine, such as an air-jet spinning machine, and such an air-jet spinning machine, which winder produces a take-up package.
  • the thread-guiding channel is particularly suitable for carrying out the method, with the thread-guiding channel forming a through-channel for conducting a thread running between the spinning device and the winding device.
  • Ring spinning machines and/or open-end rotor spinning machines have been in widespread use for a long time and have proven extremely successful.
  • so-called air-jet spinning machines are also known, in particular in connection with the processing of synthetic yarn material.
  • an air spinning device of an air spinning machine which has a nozzle block arranged on the inlet side and a downstream rotatably mounted hollow spinning spindle.
  • the nozzle block also has a sliver guide, which acts as a twist stop for a sliver that is fed in.
  • the circulating air flow initiated by the air injection nozzles leads to a suction flow in the area of the fiber inlet opening of the nozzle block, which promotes the introduction of the sliver drawn in an upstream drafting system into the air spinning device. That is, the sliver introduced into the air spinning device arrives through the nozzle block to the inlet opening of a hollow spinning spindle that rotates during the spinning process and is acted upon by a drive belt.
  • the free fiber ends are looped around the cone-shaped spindle head of the rotating spinning spindle by means of the circulating air flow and are wound spirally around so-called core fibers as the thread is drawn into the spindle. This means that during the spinning process, the core fibers form a new thread together with the so-called wrapping fibers.
  • a comparable device for producing a thread by means of a circulating air flow is also by the DE 199 26 492 A1 famous.
  • this known air spinning device does not have a rotating cone but a stationary spinning cone.
  • the sliver to be spun is introduced into the air spinning device via a sliver guide arranged in a nozzle block and reaches an inlet opening of a stationary hollow spinning cone.
  • the sliver in the area of the inlet opening of the spinning cone is also exposed to a circulating air flow in this known device, which is initiated by air injection openings arranged in the nozzle block.
  • the circulating air flow then places the free fiber ends of the sliver, as is known, around the head of the spinning cone and also supports the introduction of the sliver into the air spinning device.
  • the free fiber ends loop around the core fibers in a spiral fashion as so-called twisted fibers, thereby forming a thread.
  • the spinning process in such an air spinning device is interrupted, for example due to a break in the supplied fiber sliver, or because the spun thread was separated by a controlled cut by a thread cleaner, in the course of the subsequent piecing process used to remedy the spinning interruption, the thread end of the already spun thread, which usually has accumulated on an associated cross-wound bobbin, is retrieved and transported through the air-jet spinning device to the area of the drafting system.
  • An air flow directed counter to the operational transport direction of the thread is often used as the transport medium within the air spinning device.
  • an air spinning device in which the transport medium is generated by a compressed air source.
  • the compressed air flows through an injection channel which is integrated into the spinning cone of the air spinning device and which, for example, opens into the thread withdrawal channel of the spinning cone.
  • the injection channel is pressurized with compressed air, which causes a suction air flow in the thread withdrawal channel of the spinning cone, directed in the direction of the drafting system, which transports the thread end of a thread retrieved from the cross-wound bobbin of the work station to the pair of delivery rollers of one arranged in front of the air spinning device Drafting promotes.
  • An air spinning device for producing a thread by means of a circulating air stream is also in US Pat DE 10 2007 009 074 A1 described.
  • This air spinning device also has a hollow spinning cone arranged in a spinning housing and a nozzle block that can be pressurized with compressed air to generate a circulating air stream.
  • the spinning housing of this known air spinning device also has an expansion space which is provided with an exhaust air duct.
  • a compressed air source can be connected to the exhaust air duct for the piecing process, while the nozzle block can be separated from the compressed air supply at the same time.
  • the air spinning device DE 10 2007 009 074 A1 makes use of the fact that the expansion chamber has an exhaust air duct for discharging the compressed air introduced via the nozzle block during the spinning process, which can also be used in connection with the piecing process in the sense of an injector nozzle.
  • the production of such an air spinning device is relatively simple overall and therefore inexpensive.
  • Air-jet spinning machines that are equipped with the air-spinning devices described above have relatively good efficiencies, particularly when processing synthetic yarn material on.
  • an air spinning device in which, after a spinning interruption, the thread end of the thread that has already been spun is transported by means of a transfer arm near the outlet opening of the spinning cone, known as the spindle.
  • the thread is then sucked in by a suction element, which is positioned in front of the air spinning device in the thread running direction.
  • a suction element which is positioned in front of the air spinning device in the thread running direction.
  • the sliver that has been processed in the drafting system and exits the drafting system is also sucked into the suction element and intertwined with the thread in the suction element.
  • the two intertwined fiber elements are then sucked into the spinning cone of the air spinning device for final connection.
  • a comparable method for connecting a warped sliver with a spun thread after a spinning interruption is also in DE 103 35 651 A1 described.
  • the spun thread is first conveyed backwards, i.e. in the opposite direction to the usual direction of thread travel during the spinning process, through a stationary pair of take-off rollers arranged behind the air-jet spinning device and through the air-spinning device to a likewise stationary drafting system installed in front of the air-spinning device.
  • the end of the thread is then positioned with a predeterminable length between the open pair of output rollers of the drafting system and the end of the thread is prepared.
  • the pair of output rollers of the drafting system is then closed and the drafting system and the pair of take-off rollers are started, with the result that the prepared thread end of the thread is rolled into the sliver and connected to it.
  • the insertion of the auxiliary thread into the air spinning device takes place in two stages.
  • the auxiliary thread is first conveyed from the front through the sliver channel of a nozzle block by means of an injector flow and then introduced into the spinning cone of the air spinning device in a second stage, with the insertion of the auxiliary thread into the spinning cone taking place by subjecting the spinning cone to negative pressure, which is generated by a suction device is initiated, which is positioned in the area of the exit opening of the spinning cone.
  • the air spinning device used to carry out this method consists of two displaceably mounted structural components which are positioned at a distance from one another during the insertion of the auxiliary thread into the sliver channel of the nozzle block and during the insertion of the auxiliary thread into the spinning cone.
  • the air-jet spinning device is closed and the piecing process started.
  • the sliver drawn in the drafting system is rolled onto the auxiliary thread and transported safely through the air-jet spinning device, where a new thread is created.
  • both the auxiliary thread and the connection point auxiliary thread/sliver are removed again and the new thread is connected almost identically to an upper thread retrieved from the cheese by means of a thread splicing device.
  • the invention is intended to provide a possibility by means of which, after a spinning interruption, new, qualitatively improved piecings can be created using commercially available air spinning devices, with the associated air spinning device being particularly complex in terms of its design complexity is kept as simple as possible and functions reliably.
  • a method for operating an air-jet spinning device is proposed, which is preceded by a drafting system for drafting a sliver in the running direction of the sliver and a single-motor-driven yarn take-off device for taking off a yarn spun by means of the air-jet spinning device.
  • a drafting system for drafting a sliver in the running direction of the sliver
  • a single-motor-driven yarn take-off device for taking off a yarn spun by means of the air-jet spinning device.
  • the thread end is processed in the thread end preparation device and then transferred to the area of the exit opening of the spinning cone, from where the thread end is transported to the entry opening of the spinning cone and inside it by means of the thread take-off device that can be driven by a single motor, which is designed to be driven reversibly according to the present invention the air spinning device is positioned at a distance in front of the inlet opening.
  • the rack of the work station in question is then raised and the sliver is conveyed through the sliver guide of the nozzle block into the area of the entry opening of the spinning cone, where it is spun onto the prepared thread end of the spun thread.
  • the thread end of the spun or finished thread that has accumulated on the winding package after a spinning interruption is picked up by a suction nozzle, which is part of each of the work stations of the air-jet spinning machine.
  • the proposed method has the particular advantage that it can be used successfully without the need for new, costly developments on the air spinning devices.
  • the proposed method can also ensure that the sliver/thread connections created during piecing are qualitatively improved compared to comparable connections of known methods.
  • the thread end for the piecing process is prepared by a thread end preparation device which is equipped with a so-called holding and opening tube for preparing the thread end of the spun thread for the piecing process.
  • a thread end preparation device which is equipped with a so-called holding and opening tube for preparing the thread end of the spun thread for the piecing process.
  • a further advantage of the method is given in a further preferred embodiment, in which the drafting system of the work station can be driven by a single motor in order to be able to feed the sliver in a defined manner. More preferably, the drafting system can be driven reversibly in order to allow correction of the sliver feed or a defined retraction of the sliver fed if necessary.
  • By feeding the sliver in a defined manner in this way it can be ensured that on the one hand the sliver is first fed relatively carefully to the prepared thread end of the thread and is connected to it, and on the other hand that after a certain period of time, in other words after a certain run-in phase, the air spinning device starts moving again can produce at normal working speed.
  • the drives of the drafting system and the thread take-off device are preferably independent of each other, for example via a central control of the spinning machine or can be controlled via a workstation's own control, in order to enable an effective and needs-based interaction of these two devices.
  • a thread guide channel is arranged between the air spinning device and the take-up package, the thread guide channel forming a through channel for passing through a thread running between the air spinning device and the winding device.
  • the thread guide channel has a plurality of channel sections that are coupled to one another and can be pneumatically actuated, comprising at least a first channel section, a second channel section and a channel connecting section arranged between the first and second channel section, with the channel connecting section having a junction for supplying compressed air into the thread guide channel to generate a pneumatic overpressure in the first channel section accompanied by a pneumatic suction effect in the second channel section.
  • the first duct section, the second duct section and the duct connection section can each be formed from individual elements or a plurality of composite elements.
  • at least one of these sections, in conjunction with at least one other section of the yarn guide channel, can be designed from a one-piece, integral component. Further alternatively, at least two of these sections may be formed from a one-piece, integral component
  • the thread guide channel is designed to be able to be arranged in a defined area between the air-jet spinning device and the winding device, in particular between the air-spinning device and usually a downstream thread draw-off device, with the result that at least a section of a thread path running between these devices runs through the thread guide channel.
  • the thread end is preferably guided through the thread guide channel into the area of the exit opening of the spinning cone using the thread guide duct with the step of transferring the processed thread end to the area of the exit opening of the spinning cone. transferred.
  • a transfer of the thread end can preferably take place by means of the single-motor and reversibly driven thread take-off device.
  • the opening arranged in the channel connecting section advantageously enables automatic guiding in particular by means of pneumatic accompaniment of a thread end introduced into the thread guiding channel.
  • the junction can preferably be designed as a bore or as an annular gap. Depending on the arrangement of the first and second channel section the introduced thread end can thereby be guided pneumatically either in the direction of the air spinning device or in the direction of the winding device.
  • the air spinning device is first followed by the first duct section, then the duct connecting section and then the second duct section in the thread running direction, which is identical to the sliver running direction.
  • a thread end introduced into the second channel section can be guided pneumatically via the first channel section in the direction of the air spinning device.
  • the air spinning device can be followed first by the second channel section in the direction of travel of the yarn, then by the channel connecting section and then by the first channel section.
  • a thread end introduced into the second channel section can be guided pneumatically via the first channel section in the direction of the winding device.
  • a splicing device for example, known from the technical field of winding machines, can be provided between the yarn guide channel and the winding device for connecting two yarn ends.
  • a splicing device could be provided on a service unit supplying the work stations of the spinning machine or per work station.
  • the thread guide channel preferably the channel connecting section, has a second junction, which counteracts the first junction in such a way that compressed air is fed into the thread guide channel to generate a pneumatic overpressure instead of the first channel section in the second channel section, accompanied by a pneumatic suction effect instead of the second channel section is supplied in the first channel section.
  • a first channel section is understood below to mean a channel section of the yarn guide channel in which a pneumatic overpressure is generated by supplying compressed air via the associated junction.
  • a second channel section is correspondingly understood to be such a channel section of the yarn guide channel in which a suction effect is generated by supplying compressed air via the assigned junction or further junction.
  • one and the same channel section of the yarn guide channel forms a first or second channel section depending on the supply of compressed air via the junction or via the further junction.
  • the first junction and the second junction are preferably designed so that compressed air can be applied in a controlled manner as required.
  • a device can be provided by means of which, in the event of a thread breakage, it is possible to choose between a piecing process and a spliced connection as required.
  • the selection can be set or adjustable in terms of programming or the control side in such a way that the piecing process or the spliced connection is carried out depending on the location of the fiber sliver or thread interruption.
  • other criteria that make sense in terms of textile technology can also be used as selection criteria.
  • the thread guide channel in particular the channel connecting section, has a thread deflection section for deflecting the thread.
  • a passage axis of a channel section of the yarn guide channel, in particular of the first channel section, on one side of the yarn deflection section, which extends along the yarn path or yarn guide axis running in the channel section or the first channel section, runs transversely in a projection plane, i.e. with an included angle that is not equal 180°, to a corresponding passage axis of a channel section of the thread guide channel arranged on the other side of the thread deflection section, in particular of the second channel section.
  • a junction can be provided and configured with the thread guide channel in such a way that a passage axis of the junction, which runs perpendicularly to a passage plane spanned by the junction opening, is parallel, more preferably congruent, to the thread guide axis or the passage axis of the first channel section and transverse to the yarn guide axis of the second channel section.
  • the overpressure and suction effect can thus be generated effectively in the respective first and second channel section while avoiding or reducing otherwise disruptive flow vortices.
  • a compressed air connection cooperating with the junction can be arranged on the yarn guide channel or formed with it so that it is easily accessible from the outside.
  • the thread guide channel can have a fastening section for, in particular detachable, fastening of the thread guide channel to a housing or frame section of a work station of the spinning machine.
  • the thread guide channel can be arranged in a modular manner on the spinning machine and, according to the further preferred embodiment, can also be exchanged or dismantled if necessary.
  • the fastening section forms a housing for accommodating at least the thread deflection section or is arranged on such a housing.
  • the yarn guide channel can thus be made more compact.
  • the housing can also have the compressed air connection assigned to the junction or the further junction.
  • the housing can preferably accommodate the channel section of the thread guide channel that is closest to the air spinning device in the direction of thread travel, whereby additional sealing measures such as O-rings or the like can be reduced and the thread guide channel itself can be designed in a structurally simpler manner.
  • a thread end preparation device is provided with at least one holding and opening tube for preparing the thread end, the holding and opening tube being arranged or formed at an end of the thread guide channel close to the take-up spool.
  • Holding and dissolving tubes are well known, which is why a detailed description of the design of these can be omitted in the following.
  • the thread end can first be dissolved or prepared by means of the holding and dissolving tube before it enters the channel connection section and then passed in the direction of the air spinning device in the already dissolved or prepared state.
  • the at least one holding and dissolving tube advantageously forms a channel section of the yarn guide channel, in particular the second channel section.
  • the yarn guide channel can be made more compact and structurally more simplified.
  • the junction can be arranged in a more preferred manner adjacent to the holding and dissolving tube.
  • a compressed air connection which would only have to be provided for supplying compressed air to dissolve or prepare the thread end, can be saved. Because by means of the confluence on the one hand the threading of the thread end into the holding and opening tube accompanied by the opening or preparation of the thread end and on the other hand the pneumatic guiding of the prepared thread end via the first channel section into the air spinning device can be made possible.
  • the supply of compressed air can preferably be regulated automatically in order to automatically provide the compressed air intensity that may be different, if necessary, for the opening process and the thread guiding process.
  • a compressed air sensor for detecting the prevailing compressed air intensity can be arranged in a more preferred manner.
  • an end of the yarn guide channel close to the air spinning device is preferably designed in the manner of a nozzle or is adjacent to an element designed in the manner of a nozzle.
  • the nozzle-like end of the yarn guide channel can be formed by the corresponding end of the channel section that is closest to the air spinning device in the direction of yarn travel.
  • the nozzle-like element can preferably be designed in such a way that the nozzle-like element forms an insert element, which more preferably can be inserted and removed non-destructively at the end of the yarn guide channel.
  • a suitable nozzle end can be used for the defined pneumatic guiding of the yarn end in the direction of the air spinning device, without having to replace the yarn guide channel itself.
  • the end of the thread guide channel or the nozzle-like element near the air spinning device is arranged at a distance from a funnel inlet of a thread guide funnel leading to the air spinning device, the distance being chosen such that a thread end exiting the end of the thread guide channel or the nozzle-like element near the air spinning device can be conducted at least into the funnel inlet by means of the compressed air generated in the channel connection section.
  • the compressed air that accompanies the end of the yarn can thus flow into the area of the air spinning device when it leaves the yarn guide channel and before it enters can be suitably weakened or controlled according to their strength.
  • At least one further thread passage follows the funnel entry in the direction of the air spinning device, the thread passage entry of which is arranged at a distance from an exit of the funnel exit following the funnel entry in the direction of the air spinning device.
  • a further weakening of the strength of the compressed air accompanying the end of the thread, which can be controlled as required, can thus be achieved.
  • the 1 shows a schematic front view of a textile machine, usually referred to as a cross-wound bobbin 9, producing a winding bobbin, in the present case an air-jet spinning machine 1.
  • Such textile machines 1 have a multiplicity of work stations 2 between machine frames 13A, 13B arranged at the machine end. Arranged in a row next to each other, generally identically designed jobs 2 are also known as spinning stations.
  • a sliver can 3 is positioned at each of the work stations 2 and is equipped with a supply of template material, for example sliver 25 .
  • the work stations 2 also each have a drafting system 4, an air spinning device 5, a thread take-off device 6, a yarn clearer 7 and a thread traversing device 8, which ensures that the thread 36 in crossing layers on a package 9 is wound.
  • the so-called cross-wound bobbin 9 produced during the spinning process is, as usual, held in a creel (not shown) and is rotated by a bobbin drive (also not shown).
  • Each of the work stations 2 is also equipped with a suction nozzle 39, which makes it possible to pick up a yarn end 37 of a finished yarn 36 that has accumulated on the cheese 9 after a spinning interruption and to transfer it to a so-called yarn end preparation device 40 arranged in the area of the yarn take-off device 6.
  • the 2 shows a side view and a larger scale of an air spinning device 5 suitable for carrying out the method according to a preferred embodiment during the normal spinning process.
  • the air spinning device 5 shown in section is preceded by a drafting system 4 for forgiving a sliver 25 .
  • Installed behind the air spinning device 5 in the sliver travel direction R is a single-motor and reversibly drivable thread take-off device 6 which ensures that the finished thread 36 can be conveyed in the direction of the take-up bobbin 9 and in the opposite direction thereto.
  • yarn preparation device 40 is arranged, which prepares the retrieved by the suction nozzle 39 yarn end 37 of the finished yarn 36 for the subsequent piecing process.
  • Such yarn end preparation devices 40 are known in principle and, for example, in DE 35 18 316 A1 or in the DE 102 02 781 A1 described in quite some detail.
  • such a yarn end preparation device 40 has a holding and opening tube 31 that can be actuated pneumatically.
  • the air spinning device 5 essentially consists of a two-part outer housing 14, 15, an expansion housing 16, a nozzle block 17, a sliver guide 18 and a hollow spinning cone 19.
  • the expansion housing 16 In connection with the front housing part 14 of the outer housing, the expansion housing 16 forms a front annular space 20 which is connected to an overpressure source 22 via a pneumatic line 21 and forms an expansion space 28 in connection with the rear housing part 15 of the outer housing.
  • the annular space 20 is continuously connected pneumatically to at least one blown air nozzle 23 , which is arranged in the nozzle block 17 .
  • the blast air nozzle 23 is directed tangentially towards the head 24 of the spinning cone" 19 in such a way that a rotating air flow is established there.
  • the spinning cone 19 is preferably made of a highly wear-resistant material, for example a technical ceramic material .
  • the pneumatic line 21 is equipped with a valve 32, the actuation of which is preferably effected by a control device 38 belonging to the spinning station, which is connected to the valve via corresponding control lines.
  • the sliver 25 stored in a sliver can 3 first passes through the drafting system 4 on its way to the cross-wound bobbin 9, where it is severely warped.
  • the drafted sliver 25 is then transferred via the pair of output rollers 26 of the drafting system 4 into the area of the inlet opening 27 of the air spinning device 5 and sucked into the air spinning device 5 under the influence of a negative pressure flow present there.
  • the drawn sliver 25 reaches the inlet opening 35 of the hollow spinning cone 19 via the sliver guide 18 and the nozzle block 17 and is drawn into the spinning cone 19 by the thread 36 forming inside the spinning cone 19.
  • the sliver 25 is in the The area of the head 24 of the spinning cone 19 is exposed to the influence of a rotating flow which is generated by the air flow emerging from the nozzle block 17 .
  • the valve 32 is open for the defined supply of this air flow initiated by the compressed air source 22 to the nozzle block 17 .
  • a valve 34 connected to the control device 38 via a corresponding control line is opened to enable the air flow flowing in via the nozzle block 17 to escape through the exhaust air duct 29 to the ambient atmosphere or to a machine-specific extraction system.
  • the sliver 25 is continuously drawn into the hollow spinning cone 19, with the edge fibers being wound helically around the core fibers of the sliver 25.
  • the thread 36 produced in this way is drawn out of the air spinning device 5 by means of the thread draw-off device 6 and then wound up to form a cross-wound bobbin 9 .
  • the spinning process is interrupted during the spinning process, for example due to a break in the sliver 25 or due to a controlled cut of the already spun thread 36 by the yarn clearer 7, a piecing process must first be carried out before restarting the spinning process.
  • the thread end 37 of the already finished thread 36 is first retrieved from the cross-wound bobbin 9 by a workplace-specific suction nozzle 39 of the affected workplace 2 and placed in a tube equipped with a holding and opening tube 31, preferably the air spinning device 5 in the sliver running direction R arranged downstream yarn end preparation device 40 transferred, as exemplified with Figures 4 to 7 shown.
  • the thread end 37 is largely freed from twisting and loose fibers.
  • the yarn end preparation device 40 has a holding and opening tube 31 arranged in a receiving housing 47.
  • the receiving housing 47 in turn has an annular space 46 to which a compressed air source 42 is connected via a pneumatic line 41.
  • a valve 43 is switched on in the pneumatic line 41 and is connected via a control line 44, for example to the (in Figures 4 to 6 not shown) Control device 38 of the job 2 is connected.
  • the holding and dissolving tube 31 is equipped with at least one blowing nozzle 45 which is in communication with the annular space 46 .
  • a thread must first be placed in a holding and opening tube 31 in order to prepare its thread end for a thread connection process.
  • the yarn end preparation device 40 can, as exemplified in Figures 4 to 6 indicated, interact with at least one cutting device 50, which cuts the retrieved thread 36 to length as required.
  • valve 43 is actuated and compressed air is blown into the holding and opening tube 31 via the blowing nozzle 45 in order to pneumatically thread or suck in the cut thread end 37 into the holding and opening tube 31 .
  • the threaded thread end 37 is freed from yarn twist and loose fibers in the holding and opening tube.
  • a clamping device can also be provided, which clamps the thread in a known manner before the cutting process. The clamping device can be combined with the cutting device in a more preferred manner.
  • the yarn end preparation device 40 is coupled to a yarn guide channel 60 for guiding the yarn 36 through, the yarn guide channel 60 being arranged directly adjacent to the air spinning device 5 and the yarn end preparation device 40 in the sliver running direction R.
  • the sliver running direction R is identical to the running direction of the thread in the spinning operation of the air-jet spinning machine, in which the thread 36 is spun by means of the air-jet spinning device 5 .
  • the yarn guide channel 60 after with 4 The embodiment shown comprises a first channel section 62 and a second channel section 64 with a channel connecting section 66 interposed.
  • the housing 70 has a non-illustrated attachment section for attaching the thread guide channel 60 to a frame or housing 100 of a work station 2 of the air-jet spinning machine 1, as shown by way of example in 7 shown.
  • a first end 64A of the second channel section 64 ends in the housing 70 in a sealing manner with the interposition of an O-ring 80.
  • a second end 64B of the second channel section 64 ends according to FIG 4 shown embodiment sealingly in the receiving housing 47 of the yarn end preparation device 40 with the interposition of another O-ring 80, wherein the second end 64B rests directly against the associated end of the holding and dissolving tube 31 and forms a common channel passage for the thread 36 or the thread end 37 with it.
  • the channel connection section 66 includes a thread deflection section 67 for deflecting the thread 36 between the first 62 and second channel section 64.
  • the cross section of the thread deflection section 67 is designed in the shape of a circular arc, with the end 64A of the second channel section 64 protruding into the housing 70 and connected to the channel connection section 66 via the cross-sectionally arcuate yarn deflection section 67 is coupled to a first end 62A of the first channel section 62 connected to the channel connection section 66 for passing the yarn 36 between the air spinning device 5 and the yarn end preparation device 40 .
  • the thread guide channel 60 thus forms a section that partially encloses the thread path.
  • an angle of less than 180°, in the exemplary embodiment shown of less than 90°, is thereby formed between the first 62 and second channel section 64 .
  • the yarn guide channel 60 can be made compact.
  • the fastening section can easily be provided on a side of the thread guide channel 60 which faces away from the side enclosing the angle.
  • the housing 70 also includes a receptacle for a compressed air connection 72, for example in the form of an injector, via which compressed air can be fed via a junction 68 into the first channel section 62 to generate pneumatic overpressure, with a suction effect occurring in the second channel section 64 at the same time.
  • the junction 68 borders on the first end 62A of the first channel section 62 and feeds the compressed air parallel, in particular congruently, to a thread guide axis of the first channel section 62 and transversely to a thread guide axis of the second channel section 64 .
  • the thread guide axis is the axis along which the thread is guided in the thread guide channel 60 or in the respective channel sections 62, 64, 66.
  • the second end 62B of the first channel section 62 adjoins a nozzle insert 74 accommodated in the housing 70, which can preferably be inserted and removed in a non-destructively replaceable manner.
  • a nozzle insert 74 accommodated in the housing 70, which can preferably be inserted and removed in a non-destructively replaceable manner.
  • the thread end 37 guided out of the first channel section 62 with compressed air is blown in the direction of an opposite funnel inlet 76 at a distance from the outlet of the nozzle insert 74 .
  • the distance between the outlet of the nozzle insert 74 and the funnel inlet 76 relative to one another cannot be changed, and according to another exemplary embodiment, it can in particular be variably adjusted, thereby reducing the intensity of the Thread end 37 conductive compressed air can be achieved.
  • a proportion of the compressed air guiding the thread end 37 can escape in the gap formed between the outlet of the nozzle insert 74 and the funnel inlet 76 , while the remaining proportion directs the thread end 37 into the funnel inlet 76 .
  • the funnel entrance 76 follows in the direction of the air spinning device 5 according to this exemplary embodiment, two further thread passages 77, 78, between which further gaps are formed for the escape of a defined proportion of the compressed air before the thread end 37 enters the air spinning device 5 counter to the thread band or thread running direction R can.
  • the funnel inlet 76 with the intermediate thread passages 77, 78 are held between the housing 70 and the air spinning device 5 by means of fastening screws 79.
  • the air spinning device 5 and the housing 70 are coupled to one another by means of the fastening screws 79 .
  • a position of the funnel inlet 76 and/or the intermediate thread passages 77, 78 along the fastening screws can be variably adjusted as required in order to be able to adjust the proportion of the escaping compressed air in the individual sections.
  • the thread or the prepared thread end 37 can be guided to the air spinning device 5 in a gentle manner.
  • the thread end 37 prepared as above and transferred to the air spinning device 5 is then connected to the sliver 25 presented by the drafting system 4 .
  • the feeding of the prepared thread end 37 ends when the prepared thread end 37, as in 3 shown, is positioned within the air spinning device 5 at a distance in front of the inlet opening 35 of the spinning cone 19 .
  • the thread take-off device 6 is driven by a single motor, e.g. via a stepper motor, with the stepping motor being controlled in such a way that by detecting the number of steps of the stepper motor, the thread take-off device 6 can be reversed, i.e.
  • a sensor connected to the control device 38 can preferably be provided in the area of the nozzle block 17 and the inlet opening 35 of the spinning cone 19, by means of which the correct positioning of the yarn end 37 can also be confirmed.
  • the control device 38 causes the valves 32 and 34 to switch over in such a way that the nozzle block 17 is again pressurized with compressed air.
  • the drafting system 4, which is also driven by a single motor, and the thread take-off device 6 are controlled in such a way that a free end of the sliver 25 first comes into contact with the prepared thread end 37 of the thread 36 be connected so that a deductible new thread is created, which can be deducted from the air spinning device 5 in a defined manner by means of the thread deduction device 6 .
  • the piecing process thus merges into the normal spinning process.
  • FIG. 5 and 6 show a yarn guide channel 90 according to a further embodiment.
  • This yarn guide channel 90 differs from that with 4 Shown thread guide channel 60 structurally essentially by the location of the junction 98.
  • the junction 98 compared to that with 4 Thread guide channel 60 shown is arranged in a section upstream of the holding and opening tube 31 in the direction R of the thread travel.
  • the junction 98 is designed in the form of an annular gap directed counter to the direction R of the thread travel, in order to introduce the compressed air to be blown in in the direction of the air spinning device 5 or in a direction opposite to the direction R of the thread travel into the thread guide channel 60 .
  • the channel section including the junction 98 forms the channel connecting section 96 of the yarn guide channel 90 in the sense of the present invention.
  • the channel connection section 96 includes a further annular space 97 which is coupled to the junction 98 for supplying the compressed air.
  • the annular space 97 is coupled via an opening 48 formed in the receiving housing 47 to a further pneumatic line 92 which ends in a receiving housing 49 provided for this purpose adjacent to the opening 48 .
  • the channel connecting portion 96 is disposed near the holding and dissolving tube 31 with the second channel portion 94 interposed therebetween.
  • the second channel section 94 is coupled via a nozzle element 93 arranged in between to the holding and opening tube 31 for passing the thread end 37 through.
  • the channel connecting section 96 adjoins the first channel section 92 on a side facing away from the second channel section 94 .
  • the first channel section 92 is therefore structurally identical in this embodiment as the second channel section 64 with 4 described thread guide channel 60 configured. According to a further embodiment not shown alternatively, the first channel section 92 can be configured in one piece with the channel connecting section 96 .
  • the first channel section 92 follows in the direction of the air spinning device 5, a housing 70, which is approximately identical to that in connection with 4 described housing 70 is formed with the thread deflection section 67 and the nozzle insert 74 but without the confluence 68 and leading to the confluence 68 injector 72.
  • a housing 70 which is approximately identical to that in connection with 4 described housing 70 is formed with the thread deflection section 67 and the nozzle insert 74 but without the confluence 68 and leading to the confluence 68 injector 72.
  • a passage closed by a cover element 71 leads to the thread deflection section 67 and via which the thread deflection section 67 and thus the thread deflection is accessible.
  • differently designed thread deflection sections 67 can be inserted into the housing 70 or provided for the housing 70 in an exchangeable manner via the passage.
  • the thread deflection section 67 can be fixed in the housing 70 by means of the cover element 71 .
  • the thread deflection section 67 is essentially biconical, also known as a diabolo shape.
  • the design of this specifically biconical or any other shape of the thread deflection section 67 can be suitably selected according to the type of yarn to be guided.
  • the side surfaces of the biconical shape leading to the thread guide surface section can have a concave or convex curvature in cross section, depending on the yarn requirement, or can alternatively be straight in cross section.
  • the width of the thread guide surface section running perpendicularly to the thread deflection direction can be suitably selected to match the type of yarn to be processed.
  • the radius that makes up the thread deflection can also be suitably selected to match the type of yarn.
  • the housing 70 also follows in the direction of the air spinning device 5 in a manner as in FIG 4 shown and in connection with this described and referred to the nozzle insert 74, the funnel inlet 76 and the further thread passages 77, 78.
  • the deflected version of the yarn guide channel 60 can be placed between the other devices arranged at the work station 2 in a space-saving manner.
  • the yarn guide channel can be made even more compact, for example by combining the second channel section with the holding and opening tube in such a way that the holding and opening tube forms the second channel section, with the confluence, for example, in the form of an annular gap at the end of the holding - Is positioned and dissolving tube or formed in the end region of the holding and dissolving tube.
  • compressed air can be supplied via the junction in order to suck in the yarn end fed in by means of the suction nozzle 39 and to prepare or dissolve the yarn end 37 directly and to guide the prepared yarn end 37 in the yarn guide channel 60 pneumatically.
  • a careful or less aggressive preparation of the thread end 37 can thus be achieved.
  • a compressed air connection that is only to be provided for the resolution of the thread end 37 can be saved.
  • the housing can be designed as a swivel joint in order to be able to change the angle enclosed by the thread deflection section as required at the installation site and/or the installation process.
  • the junction or an additional junction in the area of the first channel section can be arranged and designed in such a way that the compressed air is supplied transversely to the yarn guide axis of the first channel section.
  • the first and second channel section can run in different planes in order to ensure reliable, unimpeded movement of the suction nozzle past the drafting system and the second channel section for feeding the caught yarn end into the area of the yarn end preparation device.
  • an embodiment includes an "and/or" link between a first feature and a second feature, this can be read in such a way that the embodiment according to one embodiment includes both the first feature and the second feature and according to a further embodiment either only the first Feature or has only the second feature.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Claims (11)

  1. Procédé destiné à exploiter un métier à filer à jet d'air (5) après une interruption de filage, un train d'étirage (4) pour étirer un ruban de fibres (25) étant monté en amont du métier à filer à jet d'air (5) dans le sens d'avancement du ruban de fibres (R) et un dispositif d'extraction de fil (6) pouvant être entraîné par un moteur individuel étant monté en aval pour étirer un fil (36) filé au moyen du métier à filer à jet d'air (5),
    après une interruption de filage, l'extrémité (37) du fil (36) filé enroulée sur une bobine d'enroulement (9) étant recueillie au moyen d'une buse d'aspiration (39) et transférée à un dispositif de préparation de l'extrémité du fil (40) disposé en aval du métier à filer à jet d'air (5) dans le sens de défilement du ruban de fibres (R),
    l'extrémité du fil (37) étant traitée dans le dispositif de préparation de l'extrémité du fil (40) et étant ensuite transférée dans la buse de sortie du cône de filature (19), et l'extrémité du fil (37) étant transportée vers la buse d'entrée (35) du cône de filature (19) au moyen du dispositif d'extraction de fil (6) entraîné par un moteur individuel et de manière réversible,
    caractérisé en ce que
    l'extrémité du fil (37) est positionnée à distance devant la buse d'entrée (35) à l'intérieur du métier à filer à jet d'air (5) au moyen du dispositif d'extraction de fil (6) entraîné par un moteur individuel et de manière réversible, et
    le train d'étirage (4) du poste de travail (2) concerné est relevé et le ruban de fibres (25) est alors transporté à travers un guide-ruban de fibres (18) du bloc de buses (17) dans la zone de la buse d'entrée (35) du cône de filature (19) et y est rattaché à l'extrémité (37) préparée du fil (36) filé,
    l'extrémité (37) du fil (36) filé enroulée sur une bobine d'enroulement (9) étant recueillie au moyen de la buse d'aspiration (39) qui fait respectivement partie de chaque poste de travail (2) d'une machine à filer à air.
  2. Procédé selon la revendication 1, caractérisé en ce que le dispositif de préparation de l'extrémité du fil (40) présente des tubes de maintien et de dénouage (31) pour la préparation de l'extrémité (37) du fil filé (36) pour la procédure de rattachement.
  3. Procédé selon la revendication 1, caractérisé en ce que le train d'étirage (4) du poste de travail (5) concerné, qui étire le ruban de fibres (25), peut être entraîné par un moteur individuel, notamment de manière réversible.
  4. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'un canal de guidage de fil (60 ; 90) est disposé entre le métier à filer à jet d'air (5) et la bobine d'enroulement (9), le canal de guidage de fil (60 ; 90) formant un canal de passage pour le passage du fil (36) s'étendant entre le métier à filer à jet d'air (5) et le dispositif de bobinage, et le canal de guidage de fil (60 ; 90) comportant plusieurs sections de canal (62, 64, 66 ; 92, 94, 96) couplées les unes aux autres, chargées pneumatiquement et comprenant au moins une première section de canal (62 ; 92), un deuxième section de canal (64 ; 94) et une section de liaison de canal (66 ; 96) disposée entre la première (62 ; 92) et la deuxième section de canal (64 ; 94), la section de liaison de canal (66 ; 96) comprenant une embouchure (68 ; 98) pour fournir de l'air comprimé dans le canal de guidage de fil (60 ; 90) pour créer une surpression pneumatique dans la première section de canal (62 ; 92) accompagnée d'une aspiration pneumatique dans la deuxième section de canal (64 ; 94).
  5. Procédé selon la revendication 4, caractérisé en ce que le canal de guidage de fil (60 ;
    90), en particulier la section de liaison de canal (66), présente une section de déviation de fil (67) pour dévier le fil (36).
  6. Procédé selon la revendication 5, caractérisé en ce qu'un axe de passage de l'embouchure (68) s'étend parallèlement, en particulier de manière coïncidente, à un axe de guidage de fil de la première section de canal (62) et transversalement à un axe de guidage de fil de la deuxième section de canal (64).
  7. Procédé selon l'une quelconque des revendications 4 à 6, caractérisé en ce que le canal de guidage de fil (60 ; 90) comprend une section de fixation pour fixer le canal de guidage de fil (60 ; 90) à une section de boîtier ou de cadre (100) d'un poste de travail (2) du métier à filer à air (1), la section de fixation formant notamment un boîtier (70) pour loger au moins une section de déviation de fil (67).
  8. Procédé selon l'une quelconque des revendications 4 à 7, en combinaison avec la revendication 2, par lequel le tube de maintien et de dénouage (31) est disposé ou formé à une extrémité (64B) du canal de guidage de fil (60 ; 90) proche de la bobine d'enroulement (9).
  9. Procédé selon la revendication 8, caractérisé en ce que le tube de maintien et de dénouage (31) forme la deuxième section de canal (64 ; 94).
  10. Procédé selon l'une des revendications 4 à 9, caractérisé en ce qu'une extrémité (62B) du canal de guidage de fil (60 ; 90) proche du métier à filer à jet d'air (5) est conçue sous forme de buse ou est adjacente à un élément (74) conçu sous forme de buse.
  11. Procédé selon la revendication 10, caractérisé en ce que l'extrémité (62B) du canal de guidage de fil (60 ; 90) proche du métier à filer à jet d'air (5) et conçue sous forme de buse ou l'élément (74) conçu sous forme de buse est disposé(e) à une certaine distance d'une entrée (76) d'un entonnoir de guidage de fil (76, 77, 78) menant au métier à filer à jet d'air (5), l'écartement étant choisi de telle sorte qu'une extrémité de fil (37) sortant du métier à filer à jet d'air (5) à proximité de l'extrémité du canal de guidage de fil (60 ; 90) ou de l'élément (74) conçu sous forme de buse peut être guidé au moyen de l'air comprimé produit dans la section de liaison de canal (66 ; 96) au moins dans l'entrée d'entonnoir (76), et en particulier en plus dans au moins un passage de fil (77 ; 78) se raccordant à l'entrée d'entonnoir (76), qui est disposé à une certaine distance de l'entrée d'entonnoir (76).
EP18740594.9A 2017-07-14 2018-07-13 Procédé pour faire fonctionner un arrangement de filage à jet d'air Active EP3652368B1 (fr)

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Application Number Priority Date Filing Date Title
DE102017115939.8A DE102017115939A1 (de) 2017-07-14 2017-07-14 Verfahren zum Betreiben einer Luftspinnvorrichtung, Fadenleitkanal und Luftspinnmaschine umfassend einen solchen Fadenleitkanal
PCT/EP2018/069160 WO2019012143A2 (fr) 2017-07-14 2018-07-13 Procédé pour faire fonctionner un arrangement de filage à jet d'air, canal de guidage de fil et métier à filer à jet d'air comprenant un tel canal de guidage de fil

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EP3652368A2 EP3652368A2 (fr) 2020-05-20
EP3652368B1 true EP3652368B1 (fr) 2022-02-23

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EP (1) EP3652368B1 (fr)
JP (1) JP7101755B2 (fr)
CN (1) CN110892102B (fr)
DE (1) DE102017115939A1 (fr)
PT (1) PT3652368T (fr)
TW (1) TWI770227B (fr)
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DE102018115601A1 (de) 2018-06-28 2020-01-02 Saurer Spinning Solutions Gmbh & Co. Kg Fadenumlenkeinheit
WO2020201936A1 (fr) * 2019-03-30 2020-10-08 Lohia Corp Limited Système et procédé de surveillance de rupture de bande
DE102020104883A1 (de) * 2020-02-25 2021-08-26 Saurer Spinning Solutions Gmbh & Co. Kg Schutzring und Antriebseinrichtung mit einem Schutzring
DE102020108257A1 (de) * 2020-03-25 2021-09-30 Saurer Spinning Solutions Gmbh & Co. Kg Vorrichtung zur Faservereinzelung und Spinneinrichtung umfassend eine solche Vorrichtung
EP4015682B1 (fr) 2020-12-18 2025-01-29 Saurer Intelligent Technology AG Poste de travail d'un métier à filer à jet d'air
EP4015680A1 (fr) * 2020-12-18 2022-06-22 Saurer Intelligent Technology AG Dispositif de nettoyage pour un élément de formation de fil d'une buse de filage à air ainsi que procédé de nettoyage d'un tel élément de formation de fil
LU501576B1 (de) * 2022-03-02 2023-09-11 Saurer Intelligent Technology AG Luftspinnvorrichtung sowie Verfahren zur Oberflächenbehandlung innerhalb einer Luftspinnvorrichtung
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US11753747B2 (en) 2023-09-12
US20220178052A1 (en) 2022-06-09
JP2020527197A (ja) 2020-09-03
US11753748B2 (en) 2023-09-12
WO2019012143A2 (fr) 2019-01-17
DE102017115939A1 (de) 2019-01-17
US20200224337A1 (en) 2020-07-16
TWI770227B (zh) 2022-07-11
CN110892102B (zh) 2022-04-08
EP3652368A2 (fr) 2020-05-20
PT3652368T (pt) 2022-05-10
TW201908555A (zh) 2019-03-01
WO2019012143A3 (fr) 2019-03-28
CN110892102A (zh) 2020-03-17
JP7101755B2 (ja) 2022-07-15
BR112019026870A2 (pt) 2020-06-30

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