EP3140232B1 - Machine textile servant à la production de mèche et procédé pour faire fonctionner une telle machine textile - Google Patents

Machine textile servant à la production de mèche et procédé pour faire fonctionner une telle machine textile Download PDF

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Publication number
EP3140232B1
EP3140232B1 EP15726287.4A EP15726287A EP3140232B1 EP 3140232 B1 EP3140232 B1 EP 3140232B1 EP 15726287 A EP15726287 A EP 15726287A EP 3140232 B1 EP3140232 B1 EP 3140232B1
Authority
EP
European Patent Office
Prior art keywords
roving
during
tube
guide element
sleeve
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
EP15726287.4A
Other languages
German (de)
English (en)
Other versions
EP3140232A1 (fr
Inventor
Petr Haska
Jiri STECH
Robert Mikyska
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
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Filing date
Publication date
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Publication of EP3140232A1 publication Critical patent/EP3140232A1/fr
Application granted granted Critical
Publication of EP3140232B1 publication Critical patent/EP3140232B1/fr
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/70—Constructional features of drafting elements
    • D01H5/72—Fibre-condensing guides
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/02—Carding machines
    • D01G15/12—Details
    • D01G15/46—Doffing or like arrangements for removing fibres from carding elements; Web-dividing apparatus; Condensers
    • D01G15/62—Slubbing-winding apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H57/00—Guides for filamentary materials; Supports therefor
    • B65H57/006—Traversing guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
    • 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
    • D01H13/04—Guides for slivers, rovings, or yarns; Smoothing dies
    • 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
    • D01H13/10—Tension devices
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H7/00—Spinning or twisting arrangements
    • D01H7/02—Spinning or twisting arrangements for imparting permanent twist
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H7/00—Spinning or twisting arrangements
    • D01H7/92—Spinning or twisting arrangements for imparting transient twist, i.e. false twist
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H9/00—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine
    • D01H9/02—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine for removing completed take-up packages and replacing by bobbins, cores, or receptacles at take-up stations; Transferring material between adjacent full and empty take-up elements
    • D01H9/14—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine for removing completed take-up packages and replacing by bobbins, cores, or receptacles at take-up stations; Transferring material between adjacent full and empty take-up elements for preparing machines for doffing of yarns, e.g. raising cops prior to removal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments
    • B65H2701/311—Slivers
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/11—Spinning by false-twisting
    • D01H1/115—Spinning by false-twisting using pneumatic means

Definitions

  • the present invention relates to a method for operating a textile machine which is used for the production of rovings, wherein during roving production with the aid of at least one consolidation agent a roving having a protective twist is produced from a fiber structure supplied to the consolidation agent, the rovings produced by the consolidation agent using a winding device is wound onto a sleeve, the roving being guided during winding by means of a guide element arranged between the strengthening means and the sleeve, and the guide element exerting a braking action on the roving.
  • a textile machine for producing a roving having at least one consolidation agent, with the aid of which a protective rotation can be imparted to a fiber structure supplied to the consolidation agent, and wherein the textile machine has at least one winding device, with the aid of which the roving can be wound onto a sleeve is.
  • Roving is made from fiber ribbons, which are usually pretreated with the help of draw frames and serves as a template for the subsequent spinning process, in which the individual fibers of the roving are spun into a yarn, for example using a ring spinning machine.
  • a drafting device which is usually part of the corresponding roving machine, and then to provide a protective twist.
  • the stated strength is important in order to prevent the roving from tearing when it is wound up on a tube or while it is being fed to the downstream spinning machine.
  • the protective rotation given must be strong enough to ensure that the individual fibers are held together during the individual winding and unwinding processes and corresponding transport processes between the respective machine types.
  • the protective twist it must be ensured that the roving can be processed further in a spinning machine - the roving must therefore continue to be able to be warped.
  • flyers are primarily used, but their delivery speed is limited due to centrifugal forces that occur. There have therefore already been numerous suggestions for bypassing the flyer or replacing it with an alternative type of machine (see for example EP 0 375 242 A2 , DE 32 37 989 C2 ).
  • roving is in the DE 24 47 715 A1 disclosed.
  • the consolidation of the unconsolidated fiber bandage described there takes place with the aid of a strengthening agent, which does not twist, but rather spirally wraps around a fiber band through one or more filament yarns, preferably monofilament filament yarns, which hold the fiber bandage together and give it its strength.
  • the spirals of the individual filament yarns can be arranged in the same direction or in opposite directions.
  • Two filament yarns are preferred, which are arranged in opposite rotation or intersecting.
  • the roving produced in this way is thus essentially composed of a sliver of parallelized staple fibers and one or more fine-titer filament yarns wrapping around the sliver in a spiral.
  • the filament yarn can be applied to small spools of small diameter.
  • the filament yarn is then withdrawn from the fixed bobbin and pulled together with the fiber assembly through the bobbin axis, the fiber assembly from Filament yarn is wound and the number of windings drawn from the bobbin corresponds to the number of turns applied to the fiber structure.
  • the strengthening means in such a way that only the unconsolidated fiber structure is passed through the bobbin axis in order to thereby lay the winding process behind the filament yarn bobbin.
  • the winding point should be determined by a suitable thread guide.
  • Another process for the production of roving describes the WO 2009/086646 A1 , the method comprising the following steps: 1) providing a fiber structure in the form of two, preferably untwisted, fiber bands, 2) issuing S and Z twists over alternating regions of the two fiber bands, regions of S and Z twists are separated on the respective sliver by areas without rotation, 3) bringing together the two slivers provided with S and Z twists to form a roving, the two slivers twisting automatically due to their tendency to turn back.
  • the S and Z rotations can e.g. B. are generated by means of two elements of the solidifying agent used, which hold the respective sliver by clamping, with at least one element, preferably both elements, giving the sliver through a relative movement on its surface transversely to the longitudinal direction of the sliver on both sides alternately opposite rotations. At the same time, the respective sliver is moved in the sliver direction.
  • the S and Z rotations can also be generated using an aerodynamic, in particular pneumatic, process.
  • the alternating S and Z rotations are also interrupted by changing areas without rotation.
  • the two slivers provided with S and Z twists in the same way are finally brought together at the so-called union point.
  • the slivers start to twist automatically, ie they wind around each other. This so-called piling maintains the S and Z twists in the individual fiber bands, so that a self-stabilizing two-component roving is created.
  • the areas without rotation in the first sliver should be staggered in the longitudinal direction to the areas without rotation in the second sliver, so that two areas without rotation of the first and second sliver in the resulting roving are never next to each other, since the strength of the roving essentially depends on the phase position which depends on areas without rotation of the two slivers.
  • the rovings are therefore, as described above, always brought together with the strengthening agent so that their areas are out of phase without rotation.
  • the roving produced in this way finally has a higher strength than a non-twisted fiber composite, which in the end is sufficient to wind the roving onto a spool without any distortion and to unwind it again.
  • the oscillating movement ensures that the roving is wound on top of one another in individual layers so that it can later be unwound from the spool without fear of tearing the roving.
  • the roving is now guided during winding onto a sleeve with the aid of a guide element arranged between the strengthening means and the sleeve, the guide element exerting a braking effect on the roving caused by friction between the roving and the guide element (the braking effect is generally necessary in order to gradually reduce the tensile force exerted by the rotating sleeve on the roving and thus prevent the roving from tearing between the sleeve and the strengthening agent or sleeve and the trigger unit).
  • the braking effect is adjusted during the operation of the textile machine in such a way that it is brought into contact with a, preferably empty, sleeve during a starting process, during which the roving leaving the setting agent and / or during a sleeve change, during this an exchange of a spooled tube by an empty tube is less than during normal operation between the starting process and the tube change, during which the roving is wound onto the tube until a certain degree of filling is reached.
  • the roving is braked relatively strongly by the guide element during the normal operation mentioned (i.e. during the winding process lying between the starting process and the tube change), a correspondingly high tensile force is necessary to pull the roving over a corresponding guide surface of the guide element and finally onto it Winding the bobbin.
  • the roving can therefore be wound up tightly onto the sleeve, resulting in a compact package construction.
  • the necessary tensile force is preferably transmitted through the rotating sleeve to the roving, the sleeve should be equipped with an appropriately dimensioned sleeve drive. As a result, the high braking effect during winding ensures that the roving can be wound onto the sleeve under tension after leaving the setting agent.
  • the tensile force generated by the suction unit would not be sufficient to suck in the roving against the braking effect of the guide element.
  • the roving produced by the strengthening agent would also not be able to be passed on to the sleeve, so that the normal operation mentioned could not be achieved at all.
  • the braking effect By adapting the braking effect according to the invention, it is thus possible to pull the roving over the guide surface of the guide element with a relatively low tensile force during the start and sleeve change process, so that, for example, a suction unit under vacuum can be used for this.
  • the tensile force acting on the roving can be increased by increasing the braking effect of the guide element after completion of the respective starting or sleeve changing process, so that the roving can be wound onto the sleeve with the desired tension.
  • the stated strengthening agent can be designed differently.
  • the strengthening agent is suitable, the roving on the in the above-mentioned documents WO 2009/086646 A1 and DE 24 47 715 A1 to produce the manner described.
  • the textile machine is preferably designed as an air spinning machine and the consolidation means as an air spinning nozzle, through which the protective rotation of the roving, as described above, is generated with the aid of vortex air flows (a section of a corresponding textile machine designed as an air spinning machine is described by way of example in the description of the figures).
  • the braking effect is changed by reducing or increasing the contact area over which the roving is in contact with the guide element.
  • the contact surface should at least partially deviate from a flat surface and, for example, be curved or curved, since the enlargement of the contact surface in a flat surface would not lead to an increase in the friction between the contact surface and roving and thus would not increase the braking effect.
  • the guide element should also have guide sections which guide the roving in such a way that it passes the guide element on a predetermined path.
  • the guide element or elements can comprise, for example, elevations and / or depressions which guide the roving accordingly.
  • the guide element is wrapped in the roving over a wrap angle, the braking effect being changed by changing the wrap angle.
  • the guide element preferably has a guide surface which is formed by a surface section of a cross-section, for. B. round or oval guide rod is formed.
  • the guide element can be wrapped less or more than once by the roving during a start or sleeve changing process as well as during normal operation of the textile machine.
  • the level of braking effect is ultimately directly related to the number of wraps, which of course does not have to be an integer.
  • the direction of the turns also need not be uniform.
  • the roving can loop around the guide element in a first area in a first winding direction, while there is an opposite winding direction in the remaining area.
  • the braking effect which arises from the friction between the roving and the guide element, can finally be influenced by winding or unwinding the roving on the guide element, with winding resulting in an increase in the braking effect and vice versa.
  • the winding and unwinding can be done by rotating the guide element or individual sections thereof, wherein the guide element can comprise a gripper which guides the roving, only the gripper having to be rotated about an axis of rotation in order to bring about the desired change in the wrap angle.
  • the wrap angle during the winding process has at least temporarily an amount that is between 400 ° and 2000 °, preferably between 500 ° and 1800 °, particularly preferably between 600 ° and 1600 °.
  • an amount of over 360 ° means that the guide element is wrapped in the roving more than once.
  • a wrap angle of 540 ° is equivalent to 1.5 wraps
  • a wrap angle of 720 ° means two wraps, etc. If the value lies between the above amounts, it is ensured that the roving with a relatively high tensile force over the guide surface of the Guide element must be pulled and thereby subjected to a relatively high tension before winding on the sleeve. The result is the desired compact bobbin with roving layers close together.
  • the wrap angle during the starting process and / or the sleeve change has at least temporarily an amount that is between 50 ° and 1000 °, preferably between 75 ° and 720 °, particularly preferably between 100 ° and 500 ° .
  • the braking effect in this case is relatively low, so that the roving (which at least at the beginning of the starting process and / or a sleeve change is not in contact with the sleeve and therefore cannot be pulled by the sleeve over the guide surface of the guide element ) can be moved with the help of an air flow.
  • the air flow is preferably generated by a suction unit which sucks in the roving produced by the strengthening agent until it is gripped by the sleeve and wound up by its rotation.
  • a tensile stress acts on the portion of the roving which is in contact with the guide element, the braking effect being adapted such that the average amount of said tensile stress during the winding process is at least twice, preferably at least four times, particularly preferably is at least eight times, higher than during the starting process and / or during the sleeve change. If the amount is in the specified range, the roving can only be used during the start or core change process low tensile force are pulled over the guide surface, the higher braking effect during normal operation ensuring that the stated tensile force must be correspondingly high, resulting in a tight winding of the roving.
  • the increase in the braking effect is at least 10 seconds, preferably at the latest 6 seconds, particularly preferably at the latest 4 seconds, after the roving comes into contact with an empty sleeve provided by the winding device during the starting process or during the tube change is increased.
  • the sleeve is already wrapped in the roving several times, so that the further tensile force can already be transferred to the roving during further winding, in order to be able to pull it over the guide surface of the guide element despite the increased braking effect.
  • the braking effect can be increased abruptly or gradually, for example by increasing the wrap angle of the roving in the region of the guide element.
  • the braking effect should remain constant during normal operation, although changes are of course not excluded.
  • the braking effect is increased while a first to 600th turn, preferably during a first to 300th turn, particularly preferably during a first to 100th turn, of the roving is wound onto an empty tube.
  • the braking effect in this case is not increased depending on the time, but on the number of turns. The number can be determined with the aid of a corresponding sensor, which determines the number, for example, from the speed of the sleeve.
  • the braking action during the winding process is at least 0.01 seconds, preferably at least 0.5 seconds, particularly preferably at least 1 second, and / or a maximum of 20 seconds, preferably a maximum of 10 seconds, particularly preferably a maximum of 5 seconds, before the start of a pending one Sleeve change is reduced. It would also be possible to reduce the braking effect only when the sleeve changing process begins, ie when a wound sleeve is removed from the area in which it was wound.
  • the sleeve will change during the sleeve change moved away from the guide element, for example rotated away with the aid of a rotating sleeve changing device, the tensile force exerted by the rotating sleeve on the roving is added to the tensile force exerted on the roving by moving the sleeve away, so that it maintains the braking effect would cause the roving to tear.
  • the roving is wound onto the sleeve relatively tightly, so that the volume of the finished bobbin is relatively small compared to the amount of roving spooled on.
  • the roving spooled onto the tube at the start of a winding process thereby has a lower tension than the roving spooled after the start-up procedure and / or tube change. In return, however, the risk that the roving tears outside of normal operation in the sections mentioned is significantly minimized.
  • the roving is moved between defined turning points with the help of the guide element, at least during the winding process, in order to be able to wind the roving onto the sleeve in several layers.
  • the traversing preferably takes place in a direction running parallel to the axis of rotation of the sleeve.
  • the production of the roving is not interrupted during the sleeve change, the roving produced by the strengthening agent being spooled onto the spool that was spooled before the sleeve change at least until it is empty due to the sleeve change Sleeve comes into contact.
  • the sleeves can be changed, for example, with the aid of a rotating carrier which has at least two sleeve positions. If one of the sleeves has been sufficiently spooled with roving, the carrier is rotated until the full sleeve located on the first spool position has reached the area in which it was spooled with roving. As a result, an empty tube (which is located on the second tube space) finally reaches the area mentioned and can be spooled with roving without a separate starting process being necessary for this.
  • the roving is guided continuously with the aid of the guide element during the tube change.
  • the roving between the setting agent and the sleeve is braked continuously, so that it can be wound onto the respective sleeve under a certain tensile stress.
  • the tension can in turn be varied as described above, so that the braking effect can be adapted to the current status of the winding process.
  • the textile machine according to the invention is distinguished by the fact that it has a control which is designed to operate the textile machine according to one or more of the aspects described hitherto or below.
  • it comprises a guide element which is placed between the setting means of the textile machine and a winding device and which is designed to brake the roving as it passes through the guide element.
  • the guide element preferably comprises an elongated guide section which can be wrapped in the roving.
  • a gripper that can be used to influence the number of wraps.
  • the gripper could be rotatable about an axis of rotation and comprise a gripping section in order to be able to grip the roving and to be able to wind around the guide section when the gripper is rotated.
  • the Figures 1 to 3 show a schematic view of a section of a textile machine according to the invention in the form of an air spinning machine serving as an example for such a textile machine, which is used to produce a roving 1, at different times of a starting process.
  • the air spinning machine can comprise a drafting system 16 with a plurality of corresponding drafting system rollers 17 (only one of the drafting system rollers 17 is provided with a reference number for reasons of clarity), which is supplied with a fiber structure 3, for example in the form of a doubled draw frame.
  • the air spinning machine shown in principle comprises a consolidation means in the form of an air spinning nozzle 2 spaced apart from the drafting device 16 with an internal swirl chamber which is known from the prior art and therefore not shown, and a yarn-forming element likewise known from the prior art and therefore not shown.
  • the fiber structure 3 or at least some of the fibers of the fiber structure 3 are provided with a protective twist.
  • the air spinning machine can comprise a take-off unit 4 with preferably two take-off rollers 18 for the roving 1 (the take-off unit 4 is not absolutely necessary).
  • a winding device 5 connected downstream of the take-off unit 4, which in turn should include at least one sleeve drive 6 and in each case one sleeve receptacle which is connected to the sleeve drive 6 and is known in principle, with the aid of which a sleeve 7 can be fixed and via the sleeve drive 6 is rotatable.
  • the winding device 5 can also comprise two or more sleeve receptacles, so that in addition to a receptacle for a sleeve 7, which is currently being wound during operation of the air spinning machine, one or more additional receptacles for empty sleeves 7 can be present. If the first sleeve 7 has been wound, a sleeve change takes place in which the spooled tube 7 is replaced by an empty tube 7, so that the winding process 5 can ultimately be continued without interrupting the roving production.
  • the air spinning machine shown as an example of a textile machine according to the invention now works according to a special air spinning process.
  • the fiber structure 3 is guided in a transport direction T via an inlet opening (not shown) into the swirl chamber of the air spinning nozzle 2.
  • a protective turn i.e. H.
  • at least some of the fibers of the fiber assembly 3 are captured by a vortex air flow that is generated by appropriately placed air nozzles.
  • a part of the fibers is pulled out of the fiber structure 3 at least to a certain extent and wound around the tip of a yarn-forming element projecting into the swirl chamber.
  • the fibers of the fiber composite 3 are withdrawn from the swirl chamber via an inlet opening of the yarn formation element and an extraction channel arranged within the yarn formation element and adjoining the inlet opening. Finally, the free fiber ends are also pulled on a spiral path in the direction of the inlet opening and are wound as wrapping fibers around the central core fibers - resulting in a roving 1 having the desired protective twist.
  • the roving 1 Because of the only partial twisting of the fibers, the roving 1 has a warping capability, which is essential for the further processing of the roving 1 in a subsequent spinning machine, for example a ring spinning machine.
  • Conventional air spinning devices give the fiber structure 3 such a strong rotation that the necessary warping after the yarn production is no longer possible. This is also desirable in this case, since conventional air spinning machines are designed to produce a finished yarn, which is generally said to be characterized by high strength.
  • a fiber structure 3 is delivered into the air spinneret 2 by starting the drafting unit 16.
  • the roving described above takes place, in which the fiber structure 3 receives a protective rotation.
  • the roving 1 leaves the air spinning nozzle 2 via an outlet opening (not shown in the figures mentioned) and is caught by the air flow from a suction unit 8.
  • the suction unit 8 preferably has a suction nozzle 13 with a suction opening 9 through which air and thus also the roving 1 emerging from the air spinning nozzle 2 is sucked in or sucked in.
  • the entire starting process is preferably without interrupting the roving manufacture or delivery, i.e. H. with active drafting device 16, active air spinneret 2 and, if present, active (i.e. pulling a roving 1 out of the air spinneret 2) take-off unit 4, so that a particularly high effectiveness of the air spinning machine shown can be guaranteed.
  • an indicated control 15 is provided, which is operatively connected to the described elements of the air spinning machine, in order to carry out, among other things, the starting process mentioned.
  • the controller 15 can be present per spinning station of the air spinning machine. It is also conceivable that a controller 15 is responsible for several spinning stations.
  • the suction unit 8 is moved into a transfer position (preferably the suction nozzle 13 is pivoted about a pivot axis 14), in which the suction opening 9 and thus also a section of the roving 1 (which is still supplied by the air spinning nozzle 2) in Area of the sleeve surface is - a contact between the sleeve 7 and roving 1 exists at this stage preferably not yet.
  • the traversing unit 10 in the in Figure 3 While the suction unit 8 in Figure 2 shown position (or shortly thereafter), the traversing unit 10 in the in Figure 3 spent schematically indicated position in which the roving 1 is detected and guided by the traversing unit 10.
  • the traversing unit 10 moves the roving 1 in the vicinity of the sleeve 7 or causes direct contact between the sleeve 7 and roving 1, so that the roving 1 (preferably under the action of corresponding rough surface sections of the sleeve 7) is gripped by the sleeve 7.
  • a separation unit 11 is finally activated, which comprises, for example, a movable (preferably pivotable) separation arm 12.
  • the separating unit 11 is brought into contact with the roving 1, preferably with the section thereof, which is located between the traversing unit 10 and the suction opening 9. at this moment there is a local braking of the roving 1 in the area which comes into contact with the separating unit 11, so that the roving 1 finally breaks between the sleeve 7 and the separating unit 11, since it continues to be wound up by the rotating sleeve 7, d. H. is subjected to a tensile force.
  • the tearing of the roving 1 finally creates a section of the roving 1 on the suction unit side which can be removed via the suction unit 8.
  • a roving section on the side of the air spinneret is also formed, which is already gripped by the sleeve 7 and which extends between the air spinneret 2 and the sleeve 7.
  • the roving 1 still supplied by the air spinning nozzle 2 is finally wound continuously onto the sleeve 7, the traversing unit 10, by moving in the direction of the axis of rotation 24 of the sleeve 7, ensuring that the roving 1 is evenly applied to the sleeve 7 is wound up.
  • the air spinning machine is finally in its normal, normal operation following the starting process, in which the sleeve 7 is rinsed with roving 1 until the desired one Coil size is reached.
  • the roving 1 with the aid of a Guide element 23 is guided, the guide element 23 being arranged between the air spinning nozzle 2 and the sleeve 7.
  • the guide element 23 is preferably located between the sleeve 7 and the take-off unit 4 arranged downstream of the air spinning nozzle 2 in the transport direction T and is, for example, part of the traversing unit 10.
  • the roving 1 is braked with the aid of the guide element 23, ie the roving 1 becomes in this way on the guide element 23 or a guide surface thereof, that the friction between the guide element 23 and the roving 1 exerts a braking effect on the roving 1.
  • the reason for the braking according to the invention is as follows: If the roving 1 was caught directly by the rotating sleeve 7 after passing through the air spinning nozzle 2 or a possibly downstream take-off unit 4, then a roving force would act on the roving 1, which would lead to the roving 1 breaking immediately would, since it has little tear resistance compared to a conventional yarn.
  • the tensile force generated by the rotating sleeve 7 can be guided via the guide surface of the guide element 23 in contact with the roving 1 and the associated surface Friction between roving 1 and guide surface are gradually reduced.
  • the tensile force acting on the roving 1 between the air spinning nozzle 2 and the guide element 23 is significantly smaller than between the guide element 23 and the sleeve 7.
  • the guide element 23 is located on the sleeve 7 or the outer layer of the roving which has already been wound up 1 on, the roving 1 can absorb the high tensile force generated by the rotating sleeve 7 without tearing, since the fiber length of the roving 1 is generally longer than the distance between the guide element 23 and the sleeve 7 or said outer roving layer .
  • the roving 1 can finally be wound onto the sleeve 7 with a relatively high tensile stress without the risk of tearing the same.
  • FIG Figures 4 and 5 A possible embodiment of the guide element 23 is shown in FIG Figures 4 and 5 . It is conceivable for the traversing unit 10 to be parallel to the axis of rotation 24 of the sleeve (s) 7 located in the winding device 5 includes a traversing arm which can be moved back and forth and which simultaneously represents the guide element 23.
  • the guide element 23 preferably has, for example, a rod-shaped looping section 20 and a front guide section 19 for the roving 1.
  • FIG 4 now shows a possible course of the roving 1 coming from the air spinning nozzle 2 during the starting process, which is still sucked in by the suction unit 8 at this time.
  • the roving 1 is guided in a guide groove 22 of the guide section 19 (cf. Figures 5 and 7 ) and loosely wraps around the wrapping section 20, so that only a slight braking force acts on the roving 1.
  • the fact that the braking effect is not too high is crucial at this stage, since the low tensile force caused by the air flow of the suction unit 8 would not be sufficient to pull the roving 1 over the guide surface of the guide element 23 (the guide surface is in The rest of the surface of the guide element 23 which is directly in contact with the roving 1).
  • FIG. 7 A view in the direction of the Figure 6 shown arrow shows Figure 7 .
  • the braking effect exerted on the roving 1 by the guide element 23 arises, on the one hand, through the wrapping of the wrapping section 20.
  • the braking effect is also increased by the wrapping of the looper 21, since for the amount of frictional force, the acts on the roving 1, only the wrap angle of a surface, but not its radius of curvature is decisive is.
  • the entire wrap angle ⁇ is thus made up of the Figure 7 shown wrap angle a1 and the wrap angle in the area of the gripper 21 (and possibly further wrap angles of additional wrapped surface sections of the guide element 23) together.
  • the actual wrap angle ⁇ in Figure 7 is therefore higher than the marked angle ⁇ 1.
  • Figure 8 now shows the stage in which the guide element 23 rests on the sleeve 7 and thus the roving 1 is brought into contact with the sleeve 7, as shown in FIG Figure 3 is indicated (as already mentioned, the guide element 23 is preferably part of the in the Figures 1 to 3 schematically shown traversing unit 10). After the contact between the sleeve 7 and the roving 1, the roving 1 is finally cut between the sleeve 7 and the suction nozzle 13.
  • the air spinning machine comprises, for example, one in the Figures 1 to 3 shown separating unit 11 with a movable, preferably pivotable, mounted separating arm 12.
  • the braking effect is reduced again by reducing the wrap angle ⁇ and the spooled sleeve 7 is replaced by an empty sleeve 7 without interrupting the roving production.
  • the braking effect can be increased again by increasing the wrap angle ⁇ until a new sleeve change is due.

Landscapes

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

Claims (15)

  1. Procédé d'exploitation d'une machine textile servant à la fabrication de mèche (1),
    - dans lequel, pendant la fabrication de mèche, à l'aide d'au moins un moyen de renforcement, une mèche (1) ayant une torsion de fabrication est fabriquée à partir d'un assemblage de fibres (3) amené au moyen de renforcement,
    - dans lequel la mèche (1) fabriquée par le moyen de renforcement est enroulée sur un manchon (7) à l'aide d'un dispositif d'enroulement (5),
    - dans lequel, pendant l'enroulement, la mèche (1) est guidée à l'aide d'un élément de guidage (23) disposé entre le moyen de renforcement et le manchon (7), et
    - dans lequel l'élément de guidage (23) exerce un effet de freinage sur la mèche (1), caractérisé en ce que l'effet de freinage est adapté pendant le fonctionnement de la machine textile de telle sorte que pendant une opération de démarrage pendant laquelle la mèche (1) quittant le moyen de renforcement est mise en contact avec un manchon (7), de préférence vide, et/ou pendant un changement de manchon pendant lequel un remplacement d'un manchon bobiné (7) par un manchon vide (7) est effectué, est inférieur à celui pendant une opération d'enroulement située entre l'opération de démarrage et le changement de manchon.
  2. Procédé selon la revendication précédente, caractérisé en ce qu'une filière à air (2) est mise en œuvre comme moyen de renforcement, la mèche (1) ayant la torsion de fabrication étant fabriquée à partir de l'assemblage de fibres (3) à l'intérieur de la filière à air (2) à l'aide d'un courant d'air tourbillonnant.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que l'effet de freinage est modifié en ce que la surface de contact par laquelle la mèche (1) est en contact avec l'élément de guidage (23) est diminuée ou augmentée.
  4. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément de guidage (23) est enveloppé par la mèche (1) selon un angle d'enveloppement (a), et en ce que l'effet de freinage est modifié en modifiant l'angle d'enveloppement (α) par exemple par enroulement ou déroulement de la mèche (1) sur l'élément de guidage (23).
  5. Procédé selon la revendication précédente, caractérisé en ce que, pendant l'opération d'enroulement, l'angle d'enveloppement (a) présente au moins temporairement une valeur comprise entre 400° et 2000°, de préférence entre 500° et 1800°, de plus grande préférence entre 600° et 1600°.
  6. Procédé selon la revendication 4 ou 5, caractérisé en ce que pendant l'opération de démarrage et/ou le changement de manchon, l'angle d'enveloppement (a) présente au moins temporairement une valeur comprise entre 50° et 1000°, de préférence entre 75° et 720°, de plus grande préférence entre 100° et 500°.
  7. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'en raison de l'effet de freinage, un effort de traction agit sur la partie de la mèche (1) en contact avec l'élément de guidage (23), l'effet de freinage étant adapté de telle sorte que la valeur moyenne dudit effort de traction pendant l'opération d'enroulement est au moins deux fois, de préférence au moins quatre fois, de plus grande préférence au moins huit fois supérieure à celle pendant l'opération de démarrage et/ou pendant le changement de manchon.
  8. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'augmentation de l'effet de freinage intervient au plus tard 10 secondes, de préférence au plus tard 6 secondes, de plus grande préférence au plus tard 4 secondes après que la mèche (1) est entrée en contact avec un manchon vide (7) fourni par le dispositif d'enroulement (5) pendant l'opération de démarrage ou pendant le changement de manchon.
  9. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'effet de freinage est augmenté pendant qu'un premier à 600ème tour, de préférence pendant qu'un premier à 300ème tour, de plus grande préférence pendant qu'un premier à 100ème tour de la mèche (1) est enroulé sur un manchon (7) vide.
  10. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'effet de freinage est diminué pendant l'opération d'enroulement au moins 0,01 seconde, de préférence au moins 0,5 seconde, de plus grande préférence au moins 1 seconde et/ou au maximum 20 secondes, de préférence au maximum 10 secondes, de plus grande préférence au maximum 5 secondes avant le début d'un changement de manchon imminent.
  11. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la mèche (1) est déplacée en va-et-vient au moins pendant l'opération d'enroulement à l'aide de l'élément de guidage (23) entre des points de retour définis.
  12. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la fabrication de la mèche (1) n'est pas interrompue pendant le changement de manchon, dans lequel la mèche (1) fabriquée par le moyen de renforcement est enroulée pendant le changement de manchon sur le manchon (7) bobiné avant le changement de manchon au moins jusqu'à ce qu'elle entre en contact avec un manchon vide (7) en raison du changement de manchon.
  13. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la mèche (1) est guidée en continu pendant le changement de manchon à l'aide de l'élément de guidage (23).
  14. Machine textile servant à la fabrication de mèche (1),
    - dans laquelle la machine textile présente au moins un moyen de renforcement permettant d'appliquer une torsion de fabrication à un assemblage de fibres (3) amené au moyen de renforcement, et
    - dans laquelle la machine textile présente au moins un dispositif d'enroulement (5) à l'aide duquel la mèche (1) peut être enroulée sur un manchon (7), avec un élément de guidage (23) disposé entre le moyen de renforcement et le manchon (7), l'élément de guidage (23) exerçant un effet de freinage sur la mèche (1),
    caractérisée en ce que la machine textile présente au moins une unité de commande réalisée pour faire fonctionner la machine textile selon l'une quelconque des revendications précédentes.
  15. Machine textile selon la revendication précédente, caractérisée en ce que le moyen de renforcement est réalisé comme une filière à air (2), la mèche (1) ayant la torsion de fabrication étant fabriquée à partir de l'assemblage de fibres (3) à l'intérieur de la filière à air (2) à l'aide d'un courant d'air tourbillonnant.
EP15726287.4A 2014-05-08 2015-04-17 Machine textile servant à la production de mèche et procédé pour faire fonctionner une telle machine textile Active EP3140232B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH00698/14A CH709607A1 (de) 2014-05-08 2014-05-08 Verfahren zum Betrieb einer Textilmaschine zur Herstellung von Vorgarn, sowie Textilmaschine hierzu.
PCT/IB2015/000519 WO2015170157A1 (fr) 2014-05-08 2015-04-17 Machine textile servant à la production de mèche et procédé pour faire fonctionner une telle machine textile

Publications (2)

Publication Number Publication Date
EP3140232A1 EP3140232A1 (fr) 2017-03-15
EP3140232B1 true EP3140232B1 (fr) 2020-05-06

Family

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Application Number Title Priority Date Filing Date
EP15726287.4A Active EP3140232B1 (fr) 2014-05-08 2015-04-17 Machine textile servant à la production de mèche et procédé pour faire fonctionner une telle machine textile

Country Status (6)

Country Link
US (1) US10533267B2 (fr)
EP (1) EP3140232B1 (fr)
JP (1) JP6762929B2 (fr)
CN (1) CN106460245B (fr)
CH (1) CH709607A1 (fr)
WO (1) WO2015170157A1 (fr)

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EP3425092B1 (fr) * 2017-07-06 2020-05-13 KARL MEYER Technische Textilien GmbH Dispositif et procédé pour etaler un faisceau de fibres

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Also Published As

Publication number Publication date
CN106460245B (zh) 2019-04-12
CN106460245A (zh) 2017-02-22
JP6762929B2 (ja) 2020-09-30
CH709607A1 (de) 2015-11-13
EP3140232A1 (fr) 2017-03-15
US10533267B2 (en) 2020-01-14
US20170152124A1 (en) 2017-06-01
WO2015170157A1 (fr) 2015-11-12
JP2017517654A (ja) 2017-06-29

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