EP0226582B1 - Procede et dispositif pour joindre les fils sur un systeme de filature a fibre liberee - Google Patents

Procede et dispositif pour joindre les fils sur un systeme de filature a fibre liberee Download PDF

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Publication number
EP0226582B1
EP0226582B1 EP85903813A EP85903813A EP0226582B1 EP 0226582 B1 EP0226582 B1 EP 0226582B1 EP 85903813 A EP85903813 A EP 85903813A EP 85903813 A EP85903813 A EP 85903813A EP 0226582 B1 EP0226582 B1 EP 0226582B1
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EP
European Patent Office
Prior art keywords
spinning
underpressure
fibre
thread
collecting surface
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.)
Expired - Lifetime
Application number
EP85903813A
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German (de)
English (en)
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EP0226582A1 (fr
Inventor
Peter Artzt
Heinz Müller
Gerhard Egbers
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.)
Rieter Ingolstadt Spinnereimaschinenbau AG
Original Assignee
Schubert und Salzer Maschinenfabrik AG
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Publication date
Application filed by Schubert und Salzer Maschinenfabrik AG filed Critical Schubert und Salzer Maschinenfabrik AG
Priority to EP89118965A priority Critical patent/EP0362899B1/fr
Publication of EP0226582A1 publication Critical patent/EP0226582A1/fr
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Publication of EP0226582B1 publication Critical patent/EP0226582B1/fr
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/48—Piecing arrangements; Control therefor
    • D01H4/50—Piecing arrangements; Control therefor for rotor spinning
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/48—Piecing arrangements; Control therefor
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/48—Piecing arrangements; Control therefor
    • D01H4/52—Piecing arrangements; Control therefor for friction spinning

Definitions

  • the present invention relates to a method for spinning on an open-end spinning device with a sliver feed device and an opening roller arranged in a housing, from which the fibers are fed in an air flow generated by the spinning negative pressure through a feed channel to a fiber collecting surface and in which a thread end is spun onto the spinning device Fiber collection surface is returned, from which the previously returned thread is then pulled off again with continuous incorporation of fibers, the feed device being switched on to remove the fibers unsuitable for piecing, and the fiber stream being fed via a feed channel mouth to a suction device arranged behind the feed channel mouth in the opening roller housing and only then at the beginning of the actual piecing process, the fiber stream is fed to the fiber collecting surface, and a device for carrying out this method.
  • This object is achieved according to the invention in that for the introduction of the thread end into the spinning device the spinning vacuum is effective, that the thread end is only inserted into the spinning device to such an extent that it does not touch the fiber collecting surface, and that the spinning vacuum is then switched off is while the suction arranged in the opening roller housing is effective, so that when the feed device is switched on, the fiber stream is led over the feed channel mouth and sucked off until the end of the thread is returned to the fiber collecting surface at the start of the actual piecing process, this suction is switched off again and the spinning vacuum is switched on again , so that the fiber stream is fed to the fiber collecting surface. Because the spinning vacuum initially remains switched on, the thread end is certainly stretched and inserted into the thread take-off tube and brought into the ready position.
  • the spinning vacuum is advantageously switched off and on again between a suction air source and the fiber collecting surface.
  • the procedure is such that, in order to remove the fibers that are undesirable for spinning, the fiber stream is first led over the mouth of the feed channel, that the fiber stream is then briefly fed to the fiber collecting surface, then again led over the mouth of the feed channel, and only then is fed back to the fiber collecting surface after the thread end has reached the fiber collecting surface and the thread has started to be drawn off.
  • opening roller is followed by a fiber transport roller
  • a negative pressure outside the fiber transport path relative to the periphery of a fiber transport roller connected downstream of the opening roller is brought into effect to remove the fibers that are undesirable for spinning.
  • an opening roller housing with an opening roller, a fiber collecting surface rotating in a housing, a feed channel leading from the opening roller housing to the fiber collecting surface, a vacuum source for generating the vacuum underpressure and a suction opening in the peripheral wall of the opening roller housing a switching device between the vacuum source and the fiber collecting surface for switching the spinning vacuum on and off and a switching device for switching the vacuum on and off are provided at the suction opening.
  • a thread return device for returning the thread end to a standby position within the thread take-off tube, a discharge device for releasing the thread end for its return delivery to the fiber collecting surface and a control device for controlling the piecing process and of the switching devices provided.
  • the switching devices are expediently designed as part of a switching device by means of which the negative pressure source can alternately be connected to the fiber collecting surface as spinning negative pressure or to the suction opening for suctioning off the fibers.
  • the switching device according to the invention has two control bores, one of which can be brought into alignment with a first vacuum line to the fiber collecting surface and the other can be brought into alignment with the second vacuum line to the suction opening.
  • the stationary edges as well as the movable edges of the switching device that can be brought into alignment with them are designed as cutting devices.
  • the switching of the vacuum ratios can in principle be carried out in any customary manner, for example with the aid of electromechanical or hydro- or pneumo-mechanical means.
  • the switchover is carried out mechanically, the switchover device being actuated in one direction of movement by a control drive, while a spring element is provided for the resetting.
  • a maintenance trolley which can optionally be delivered to any number of spinning positions, then according to the invention a second vacuum source is provided on this maintenance trolley, the switching device being used to alternately switch on the vacuum source to generate the spinning vacuum and the vacuum source to remove the fibers which are undesirable for piecing .
  • the switching device can advantageously be controlled by the connecting movement of a suction air line emanating from the maintenance vehicle to the switching device and / or by the negative pressure in this suction line.
  • the device for controlling the vacuum can be different, e.g. be designed as a fan controllable from the maintenance device; however, it advantageously contains a valve, in particular a check valve.
  • the suction opening can be arranged in the peripheral wall surrounding the opening roller instead of in the peripheral wall surrounding the opening roller.
  • the present invention makes it possible, with the aid of a simple device, to control the fiber feed into the spinning chamber in such a way that only perfect fibers enter the spinning chamber for piecing, since all control and switching devices for the fiber stream outside the critical fiber transport path between the opening roller and the fiber collecting surface are arranged so that an effective deflection of the fiber flow past the fiber collecting surface into a suction for piecing is achieved without affecting the subsequent spinning process.
  • the invention even enables quantitative control of the fiber flow, so that not only the piecing takes place, but also the appearance of the piecing is improved to a considerable extent without additional devices for the controlled drive of the feed device being required for this.
  • FIG. 1 shows a spinning position of a rotor spinning machine
  • the invention can also be used with other open-end spinning machines, e.g. Use friction spinning machines with advantage.
  • Each spinning station of the rotor spinning machine shown has a disintegration device 1 with an opening roller 11 arranged in an opening roller housing 10.
  • the opening device 1 is assigned a feed device 2, which in the exemplary embodiment shown consists of a driven one Feed roller 20 and a feed trough 21, which cooperates elastically with the feed roller 20.
  • a dirt separating opening 12 is also provided in the peripheral wall 101 of the opening roller housing 10 surrounding the opening roller 11.
  • the opening 130 of a feed channel 13 leading to the open-end spinning device 3 is provided in the peripheral wall 101 of the opening roller housing 10.
  • the open-end spinning device has a spinning unit designed as a spinning rotor 30, which is enclosed by a housing 31. Coaxial to the spinning rotor 30, a thread draw-off tube 32 opens into the housing 31, through which a thread 4 can be drawn out of the spinning rotor 30.
  • a pair of take-off rollers 41, 42 is provided.
  • the thread 4 is wound on a spool 44 driven by a winding roller 43.
  • a discharge magnet 45 is provided in the vicinity of the thread path between the take-off rollers 41, 42 and the winding roller 43.
  • a vacuum line 50 is connected to the housing 31 in order to generate the necessary spinning vacuum and is connected to a vacuum source 5. Since air can be sucked into the housing 31 through the thread take-off tube 32, the spinning vacuum acting in the housing 31 is only effective to a limited extent via the feed channel 13 also at its mouth 130.
  • a second vacuum line 51 connected to the open-end spinning device 3 is provided. This second vacuum line 51 ends in a suction opening 52, which - as seen in the fiber transport direction (arrow 46) - is provided between the mouth 130 of the feed channel 13 and the delivery device 2 outside the fiber transport path in the peripheral wall 101 of the opening roller housing 10. This second vacuum line 51 is also connected to the vacuum source 5 via a switching device 64.
  • this switching device is 64 designed as a rotary valve.
  • the first or the second vacuum line 50, 51 can alternately be connected to the vacuum source 5, which in this way is alternately assigned to the fiber collecting surface 33 of the spinning rotor 30 as spinning vacuum or the suction opening 52 for suctioning the fibers 47.
  • the switching device 64 is connected to a drive device 60, which is controlled by a control device 7.
  • the position of the switching device 64 shown with a solid line in FIG. 1 is the spinning position during which the spinning vacuum is generated in the spinning rotor 30, and the position indicated by dashed lines is the fiber removal position in which the vacuum is present at the suction opening 52.
  • the fibers 47 are thus guided into the feed channel 13 or into the suction opening 52.
  • a filter is provided in the vacuum line 51 at a suitable point, with which the extracted fibers 47 are collected.
  • the sliver 40 to be spun is fed to the opening device 1 with the aid of the feed device 2 and is broken up into individual fibers 47 by the opening roller 11.
  • the opening roller 11 which effects the fiber transport from the feed device 2 to the feed channel 13, dirt constituents contained in the fiber material are thrown out through the dirt separation opening 12.
  • the fibers 47 enter the spinning rotor 30 and are deposited there on the fiber collecting surface 33, where the fibers 47 are bound into the end of the thread 4.
  • This thread 4 is drawn off from the spinning rotor 30 by the take-off rollers 41, 42 and wound on the spool 44.
  • the switching device 64 assumes its spinning position, in which, via the first vacuum line 50, the one generated by the vacuum source 5 Spinning vacuum is present on the housing 31 and to a reduced extent on the mouth 130 and the connection of the second vacuum line 51 to the vacuum source 5 is interrupted.
  • the spinning process is interrupted in a known manner via a thread monitor, not shown, and the spinning station is switched off.
  • the supply of the sliver 40 to the opening roller 11 is stopped by stopping the delivery device 2.
  • the housing 31 remains in connection with the vacuum source 5.
  • the spinning rotor 30 is then braked.
  • the fibers 47 still remaining in the spinning rotor 30 and the end of the broken thread 4 are detached from the thread-forming region 33 of the spinning rotor 30 by introducing a mechanical or pneumatic cleaning agent and suctioned off from there.
  • the thread 4 is sought on the bobbin 44, drawn off from it, shortened to a defined length, brought to the mouth of the thread take-off tube 32 via the armature of the ejection magnet 45, and then with the aid of the also in the thread take-off tube 32 effective spinning negative pressure is introduced into the spinning rotor 30, but without touching its fiber collecting surface 33.
  • the changeover device 64 is then brought into its fiber removal position in preparation for the piecing process.
  • the feed device 2 is then switched on again.
  • the fiber stream is now sucked out of the opening roller housing 10 through the suction opening 52.
  • the thread end acquires a shape which is advantageous for piecing in a known manner.
  • the switching device 64 is reversed again and brought into its spinning position so that the vacuum is switched off at the suction opening 52 and switched on in the spinning rotor 30 and at the mouth 130 of the feed channel 13.
  • the thread 4 By dropping the thread 4 from the ejection magnet 45, the thread 4 is now returned to the fiber collecting surface 33 due to the negative pressure now acting in the spinning rotor 30.
  • the thread end comes into contact with the fibers 47 located on the fiber collecting surface 33, which in the case of the spinning rotor shown form a fiber ring.
  • the thread 4 is then withdrawn from the spinning rotor 30 with the constant inclusion of the continuously fed fibers 47 and wound on the spool 44.
  • the switching operations of the switching device 64 are carried out with the aid of a drive device 60, which receives its control commands from a control device 7.
  • this control device 7 generally controls other processes besides piecing and thread break repair, such as, for example, changing bobbins, etc.
  • FIG. 2 shows the underside of a suction channel 53 which is connected to the vacuum source 5 (FIG. 1) and which - as is customary in open-end spinning machines - can be arranged via a large number of spinning stations arranged next to one another, e.g. Rotor spinning positions, extends.
  • a switching device 6 is provided on this suction channel 53, which has a web 54 and 55 on its underside on its underside.
  • Two actuating elements 61 and 62 are mounted in the web 54 facing the operating side (on the right in FIG. 2).
  • the adjusting element 61 has an elongated hole 610, with the aid of which the vacuum line 50 or 51 can be connected to openings provided in alignment in the underside of the suction channel 53.
  • the actuating element 61 is sealingly guided between the underside of the suction channel 53 and a sealing strip 56 which connects the two webs 54 and 55 to one another.
  • the elongated hole 610 has a minimum size which corresponds to that of the cross sections of the vacuum lines 50 and 51, but can also have a greater length, as will be explained below.
  • the actuating element 61 At its end facing the operating side of the spinning machine 36 (on the right in FIG. 2), the actuating element 61 has an enlarged actuating button 611. One end of a spring element 612, the other end of which is supported on the web 54, is supported on this actuating button 611. The control element 61 has at its other end a stop 613 which secures the released control element 61 in its spinning position, in which the vacuum line 50 is connected to the suction channel 53.
  • the actuating element 61 has on its longitudinal side a latch 614, behind which a pawl 63 can snap.
  • the pawl 63 is pivotally mounted about an axis 58 provided in the web 55 and is elastically loaded by a spring element 630.
  • the other end of the spring element 630 is supported on a web 57 which connects the two webs 54 and 55 to one another.
  • the pawl 63 has at its end facing the web 54 a ramp-like slope 631, on which the bevelled end 620 of the actuating element 62 can run.
  • the end of the actuating element 62 facing away from this bevelled end 620 has an enlarged actuating button 621.
  • a spring element 622 is supported between this actuating button 621 and the web 54, so that the actuating element 62 is acted on in the direction of the operating side (on the right in FIG. 2) of the machine .
  • the actuating element 62 carries a stop 623 between the web 54 and the bevelled end 620.
  • control device 7 which controls the entire piecing process, etc., is arranged on a maintenance carriage 70, which can be moved along the operating side of the spinning machine 36 and can thus optionally operate any desired spinning position of a multiplicity of such spinning positions.
  • This control device 7 is connected in a suitable manner in terms of control to drive bolts 71 and 72, which together with the actuation buttons 611 and 621 form a drive device 60 for the switching device 6.
  • the drive bolts 71 and 72 can each be part of an armature of an electromagnet, for example. If the drive bolts are to be driven gradually, that is to say very gradually or during their movement phase at changing speeds, then a drive with the aid of a stepping motor or the like is also possible.
  • FIG. 2 shows the switching device 6 in its fiber removal position, since the elongated hole 610 opens the connection between the suction channel 53 and the vacuum line 51.
  • the actuating element 61 is secured by the pawl 63, which is locked behind the latch 614.
  • the control device 7 of the maintenance device 70 actuates the actuation button 621 with the aid of the drive bolt 72 - or, if desired, also by hand.
  • the actuating element 62 moves, the return spring 622 is tensioned.
  • the actuating element 62 finally comes with its bevelled end 620 to bear against the bevel 631 of the pawl 63 and pivots it against the action of the return spring 630.
  • the pawl 63 releases the detent 614, and the actuating element 61 can by the now relaxing return spring 612 return to its basic position, which is shown in broken lines in FIG. This position is defined by the stop 613.
  • the actuating element 62 After the actuation button 621 has been released, the actuating element 62 also returns through the relaxing return spring 622 to the starting position shown, in which the stop 623 bears against the web 54.
  • the pawl 63 which is now released again, is now brought back into contact with the actuating element 61 by the return spring 630.
  • the switching device 6 is to be brought back into the fiber removal position at a later time, this is done by actuating the actuating button 611 with the aid of the drive bolt 71 or by hand.
  • the actuating element 61 reaches the position shown, in which the return spring 612 is preloaded, in which it is secured by the pawl 63 engaging behind the catch 614.
  • the elongated hole 610 has a larger opening than the cross section of the vacuum line 50 or 51, so that in an intermediate position the elongated hole 610 connects the suction channel 53 both to the first vacuum line 50 and to the second Vacuum line 51 partially released and thus both the fiber collecting surface 33 and the suction opening 52 are simultaneously subjected to negative pressure. This ensures that the fibers 47 are not suddenly left alone during the switchover, but are always in a suction air flow.
  • the switching device 6 described with reference to FIG. 2 allows both the actuation from a maintenance trolley 70 and the manual actuation, which is very simple due to the possibility of locking the actuating element 61.
  • An actuator 81 is slidably mounted in a housing 80.
  • the housing 80 is closed on both sides by a cover 82 and 83, respectively.
  • a spring element 84 which thus acts on the control element 81 in the direction of the cover 83.
  • the cover 83 has a central bore 830 through which an adjusting bolt 810 of the actuating element 81 extends.
  • the actuating element 81 has two control bores 811 and 812, of which the control bore 811 connects two pipe sockets 500 and 501 to one another when the spring element 84 is relaxed. These pipe sockets 500 and 501 serve to connect the first vacuum line 50 to the changeover device 8.
  • the second control bore 812 of the control element 81 connects two pipe sockets 510 and 511 to one another in its other end position, which serve to connect the second vacuum line 51 to the switching device 8.
  • the actuating element 81 In the spinning position, the actuating element 81 is in the position shown, in which the control bore 811 is in alignment with the vacuum line 50 to the fiber collecting surface 33, so that the vacuum in the spinning rotor 30 is maintained while no vacuum is present at the suction opening 52.
  • the fibers 47 thus reach the fiber collecting surface 33 in the spinning rotor 30 due to the negative spin pressure prevailing in the spinning rotor 30.
  • the pressure on the adjusting bolt 810 can also be done manually here.
  • this adjusting bolt 810 is controlled by a movable maintenance carriage 70 via an electromagnet (not shown) or via a drive bolt 71.
  • each vacuum line 50 and 51 is assigned its own control bore 812 or 811, which can be brought into alignment with the pipe socket 500 and 501 or 510 and 511.
  • one or more fibers 47 are in the transition from the pipe socket 510 into the control bore 812 or from the control bore 812 into the pipe socket 511. It can also occur, albeit rarely, that fibers 47 are in the transition area between pipe socket 500 and control bore 811 or between control bore 811 and pipe socket 501 at this time.
  • edges 813, 814, 815 and 816 of the control bores 811 and 812 and the edges 800, 801, 802 and 803 of the pipe socket 500 assigned to them , 501, 510 and 511 or the housing 80 are formed with sharp edges so that the stationary and the movable edges 800 and 813, 814 and 801, 802 and 815 as well as 816 and 803 which can be brought into alignment each form cutting devices in pairs.
  • control element 81 When the control element 81 is switched over, the fibers 47 and yarn remnants located in the area of these cutting devices are severed, so that a part thereof remains in the control bore 811 or 812 and the other part in the vacuum line 50 or 51. A jamming of the actuator 81 is avoided in a safe manner.
  • the cooperating edges of the switching device 64 (FIG. 1) or 6 (FIG. 2) and the vacuum lines 50 and 51 or associated connecting pieces, not shown, can be designed as cutting devices.
  • the two vacuum lines 50 and 51 are connected to a common vacuum source 5 or to a common suction channel 53.
  • a separate vacuum source can of course also be provided for each vacuum line 50 and 51, it being possible for these vacuum lines 50 and 51 to be connected to these vacuum sources by separate switching devices or by a common switching device 64, 6 or 8. This can be seen particularly clearly when viewing FIG. 3.
  • Fig. 4 shows the example of a friction roller 34 having open-end spinning device, that instead of the opening roller 11, several rollers effecting the fiber transport can also be provided, the first roller 14 serving to dissolve the fiber material to be spun and is therefore designed as an opening roller.
  • the second roller 15, which is rotatably mounted between the opening device 1 and the friction rollers 34, is disk-like formed and has a collection surface 150 on its circumference.
  • the collection surface 150 is connected to the opening device 1 via a feed channel 13 which opens approximately tangentially in the direction of the rotational movement of the collection surface 150 and the width of which is adapted to the collection surface 150.
  • the roller 15 is mounted on a hollow axis 152 fastened in the machine frame, which extends in a plane perpendicular to the axes 340 of the friction rollers 34, and is driven in the direction of the arrow 460.
  • the roller 15 is for the sake of clarity a relatively large distance from the gusset area of the friction rollers 34.
  • the roller 15 should extend as far as possible into the gusset area so that the path of the fibers from the collecting surface 150 into the gusset area is as short as possible.
  • a controllable suction air nozzle 35 is located on the side of the gusset area of the friction rollers 34 facing away from the take-off rollers 41 and 42.
  • the fibers are held on the perforated collecting surface 150 by a suction air stream during their transport to the friction rollers 34.
  • the disk-like roller 15 is connected to a suction device (not shown) via the hollow shaft 152.
  • the suction air flow acts only in a sector I on the collecting surface 150, which extends in the direction of rotation of the roller 15 from the feeding point of the fibers onto the collecting surface 150 up to its detaching point specified by a transfer sector 11.
  • the transfer sector II is kept separated from the suction air flow by partitions 151 so that the fibers 47 can detach from the collecting surface 150.
  • the housing 10 has an opening 160 of a fiber feed channel 16 leading to the friction rollers 34.
  • the pipeline 153 can also be connected to a compressed air device and the collecting surface 150 in sector II can be subjected to a slight overpressure.
  • the fibers can also be held on the collection surface 150 mechanically, for example by needles (not shown) arranged on the circumference of the collection surface 150.
  • a sector II subsequent and up to the mouth of the fiber feed channel 13 sector III is kept free of flow by means of a fixed aperture 154.
  • a circumferential wall 100 extending up to the collecting surface 150 is provided in the area of this sector III.
  • the suction opening 52 is arranged in this peripheral wall 100, ie outside the fiber transport path between the fiber discharge opening 160 and the fiber feed channel 13.
  • the fiber material is fed via the feed trough 21 as a sliver 40 by means of the delivery roller 20 to the opening roller 14, by means of which the sliver 40 is separated into fibers 47.
  • the negative pressure in sector 1 of the roller 15 creates a transport air flow which transports the individual fibers 47 through the feed channel 13 to the collecting surface 150, on which the fibers 47 are deposited.
  • the fibers 47 which are fed to the circumferential collecting surface 150 with simultaneous duplication, are transported there via the sector I, on which they are held pneumatically and / or mechanically, to the mouth 160 of the feed channel 16 and, since the collecting surface 150 moves in the gusset area in the thread take-off direction , fed into the gusset area parallel to the thread axis in the transfer sector II. There they are tied to the rotating open thread end and turned into a thread 4.
  • the supply of fiber material to the opening roller 14 is interrupted by stopping the feed device 2.
  • the negative pressure in the friction rollers 34 is switched off.
  • the thread end is returned to the spinning gusset of the friction rollers 34, which is supported by a suction air flow which is now effective in the suction air nozzle 35.
  • the feeding device 2 is switched on. So that no fibers 47 reach the friction rollers 34 in this case, a vacuum is applied to the suction opening 52 on the circumference of the roller 15 via the vacuum line 51. As a result, the air flow flowing through the pipe 153 in the transfer sector II is conducted into the suction opening 52.
  • the fibers 47 supplied by the roller 14 onto the collecting surface 150 follow this air flow and are thus sucked into the vacuum line 51.
  • the vacuum in the suction air nozzle 35 and in the vacuum line 51 is switched off and instead the vacuum in the friction rollers 34 or one of them is switched on.
  • the thread 4 is withdrawn from the spinning gusset of the friction rollers 34 with the simultaneous incorporation of the fibers 47 now fed back into the spinning gusset.
  • the fiber flow is controlled by the switching of the air flow described.
  • the fibers 47 which are not required when the spinning process is interrupted are removed before they have reached the spinning unit.
  • the renewed delivery of the fibers 47 to the spinning unit ensures that only undamaged fibers 47 arrive there.
  • the thread 4 produced thus has a high strength in the area of its piecing.
  • the suction opening 52 can also be arranged in the peripheral wall 101 of the opening roller 14 after the mouth 130 of the feed channel 13 provided there instead of in the peripheral wall 100 of the roller 15.
  • the negative pressure in sector I is the second Roller 15 is controlled synchronously with the negative pressure in the friction rollers 34.
  • the pipeline 153 alternately to the atmosphere or a compressed air source (not shown) or can be connected to a suction air source (vacuum line 151).
  • the correspondingly configured switching device (compare 64, 6 or 8) connects the pipeline 153 to the atmosphere or the compressed air source, while the suction opening 52 from the vacuum source 5 is separated and a vacuum is applied to the friction rollers 34 via the vacuum line 50.
  • the switching rollers separate the friction rollers 34 from the vacuum source 5 and the suction opening 52 following the fiber discharge opening 160 via the vacuum line 51 to the Vacuum source 5 connected.
  • the pipeline 153 is simultaneously connected to the vacuum line 51 mentioned. In this way, whenever the suction opening 52 is under vacuum, the sector II of this roller 15 is also under vacuum.
  • FIG. 5 A further modification of the device for performing the described method is shown in FIG. 5.
  • the vacuum line 51 ends in a switching device 512 designed as a check valve, with the aid of which the vacuum in the vacuum line 51 can be controlled.
  • the check valve is located in the version shown in a chamber 513, which in turn is arranged at the end of the vacuum line 51, which faces the maintenance carriage 70 which can be moved along the spinning machine 36.
  • An axial guide 514 for the valve cone 515 is located centrally in the chamber 513.
  • the valve cone 515 is acted upon by a spring element 516 which is supported at its other end on spokes 517, with the aid of which the guide 514 is rigid with the peripheral wall of the chamber 513 connected is.
  • the chamber 513 On its side facing the maintenance carriage 70, the chamber 513 has an opening 519 which is surrounded by a valve seat 518 and which can be closed or opened by the valve cone 515.
  • a telescopic suction air line 74 extends in the direction of the spinning machine 36.
  • the suction air line 74 is assigned a drive device 75, through which the mouth 740 of the suction air line 74 is brought into a sealing arrangement against the wall of the chamber 513 facing the maintenance car 70 or from this can be withdrawn.
  • a pin 742 is held with the aid of spokes 741, which axially projects beyond the mouth 740 in the direction of the spinning machine 36 and, when the mouth 740 abuts the chamber 513, holds the valve cone 515 at a distance from its valve seat 518 and thus the valve opens.
  • the fiber feed into the feed channel 13 is released, while the switching device 512 designed as a check valve assumes its closed position.
  • the fibers 47 thus pass through the mouth 130 of the feed channel 13 onto the fiber collecting surface 33 of the spinning rotor 30 or of the friction rollers 34, where they are bound into the end of the thread 4.
  • the spinning rotor 30 is stopped via a thread monitor (not shown) and the fiber feed to the opening roller 11 is prevented, the spinning vacuum in the spinning rotor 30 being maintained further.
  • the spinning rotor 30 After reaching the spinning position concerned, the spinning rotor 30 is cleaned in a known manner by control from the maintenance carriage 70, and the thread end is prepared so that it has a favorable piecing shape. The spinning rotor 30 is then released again. This runs up. While the rotor is ramping up or after the rotor operating speed has been reached, the thread end is returned in a customary manner, forming a thread reserve, to a standby position in the thread take-off tube 32 (FIG. 1), where the negative pressure applied to the housing 31 is still effective.
  • the fibers 47 which were previously damaged by the running opening roller 11 when the feed device 2 is shut off, are removed so that they do not get into the spinning rotor.
  • the connecting movement of the suction air line 74 emanating from the vacuum source 73 to the switching device 512 switches it over, so that the vacuum generated in the vacuum source 73 is now present at the suction opening 52.
  • the fibers 47 fed to the opening roller 11 after switching on the feed device 2 are thus conveyed over the mouth 130 to the suction opening 52 and from there via the vacuum line 51, the chamber 513 and the suction air line 74 to the vacuum source 73 of the service vehicle 70.
  • the fiber feed into the spinning rotor 30 is released again, where the fibers connect to the end of the thread that has now reached the spinning rotor 30 by releasing the thread reserve.
  • the thread 4 is then drawn off again from the spinning rotor 30 in a known manner with the aid of the take-off rollers 41, 42 and the bobbin 44 (FIG. 1), the fibers 47 newly arriving on the fiber collecting surface 33 being integrated.
  • the suction air stream acting in the suction opening 52 is meaningless. It no longer has any influence on fiber transport.
  • the negative pressure behind the mouth 130 ie. H. in the vacuum line 51, turned off.
  • the opening 519 is closed, so that air cannot flow through the opening 519 in either direction. Thus, no air that could otherwise interfere with the fiber transport and the spinning process gets into the opening roller housing 10.
  • the switching device can also be designed differently than shown.
  • it is designed as a slide valve, which is acted upon by a spring element in the closed position and can be brought into the release position by the connecting movement of the suction air nozzle 74 (FIG. 5) arranged on the maintenance car 70 to the vacuum line 51.
  • FIG. 6 Another embodiment of a switching device 86 is shown in FIG. 6.
  • a flap 860 is provided, which is articulated above the mouth 861 of the vacuum line 51 facing the maintenance car 70.
  • the mouth 861 forms a valve seat, which is inclined obliquely in such a way that the flap 860 seals against the valve seat due to its own weight.
  • the flap 860 is located together with its mouth 861 of the vacuum line 51 in a chamber 862, which is open on its side facing the maintenance car 70. From the maintenance carriage 70, the mouth 740 of the suction air line 74 can be sealingly brought into contact with the open side of the chamber 862, as is indicated by dashed lines in FIG. 6.
  • the flap 860 assumes the position shown in full lines, the sealing abutment of the flap 860 on the Mouth 861 is supported by the negative pressure prevailing in the opening roller housing 10. If, after the mouth 740 of the suction air line 74 is applied to the chamber 862, negative pressure is applied to the suction air line 74, the flap 860 lifts off from the mouth 861 (dashed position 860 '), and the fiber stream can get into the suction air line 74.
  • a switching device 512 or 86 designed as a check valve for controlling the negative pressure in the negative pressure line 51 has been described above. However, it is also conceivable to provide a shut-off valve on the spinning machine 36 which is actuated from the maintenance carriage 70 and the vacuum line 51 with a vacuum source provided on the spinning machine 36 itself connects or not, which is independent of the vacuum source 5. It is also conceivable to actuate a switch from the maintenance carriage 70, via which a fan is switched on or off. Likewise, the suction air line 74 (FIG. 5) can also be connected via the maintenance carriage 70 to a vacuum source provided on the spinning machine 36.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Abstract

En préparation de processus consistant à joindre les fibres, l'on applique une sous-pression à l'extérieur du chemin de transport de la fibre sur la périphérie d'un cylindre couvert (11), la sous-pression étant supérieure à la sous-pression de filage à l'ouverture (130) du passage d'alimentation (13) pour la surface de prise de la fibre (33). De cette manière, le passage de la fibre sur l'ouverture (130) est dévié et aspiré. Au début du processus de liaison des fibres, l'on supprime cette sous-pression, de sorte que le passage de la fibre est dirigé vers la surface de prise de la fibre (33). Pour varier le passage de la fibre, l'on peut raccorder une source de sous-pression (5) à l'ouverture d'aspiration (52) à l'aide d'un système de commutation (64) et d'une ligne de sous-pression (51).

Claims (16)

  1. Procédé pour rattacher (le fil) d'un dispositif de filature à fibres libérées, comportant un dispositif d'alimentation en ruban de fibres et un cylindre défibreur disposé dans une enceinte, d'où les fibres sont acheminées en passant par un canal d'alimentation, à l'aide d'un courant d'air produit par la dépression de filature, jusqu'à une surface collectrice de fibres tournant dans une enceinte, et dans lequel, lors de l'opération de rattachement, une extrémité de fil est rétrolivrée à la surface de collecte de fibres, d'où le fil qui a été précédemment rétrolivré est à nouveau retiré avec incorporation continue de fibres, le dispositif d'alimentation étant mis en marche pour éliminer les fibres non souhaitées pour l'opération de rattachement et le courant de fibres étant conduit en passant au-dessus de l'embouchure du canal d'alimentation jusqu'à une aspiration disposée au-delà de l'embouchure du canal d'alimentation dans l'enceinte du cylindre défibreur, de façon telle que les fibres ne parviennent pas dans le canal d'alimentation, ce courant de libres n'étant dévié dans le canal d'alimentation qu'au début de l'opération de rattachement proprement dite, procédé caractérisé en ce que, pour l'introduction de l'extrémité de fil dans l'installation de filature, la dépression de filature est en action ; en ce que l'extrémité de fil n'est rétrolivré au dispositif de filature que juste assez loin pour qu'elle ne touche pas la surface de collecte de libres ; puis qu'ensuite la dépression de filature est interrompue tandis que l'organe d'aspiration disposé dans l'enceinte logeant le cylindre défibreur est en action, de façon telle que, lors de la mise en marche du dispositif d'alimentation, le courant de fibres est conduit en passant au-dessus de l'embouchure du canal d'alimentation et est aspiré jusqu'à ce qu'au début de l'opération de rattachement de fil proprement dite l'extrémité de fil soit rétrolivrée à la surface de collecte de libres ; en ce que cette aspiration est à nouveau arrêtée et en ce que la dépression de filature est remise en marche de façon telle que le courant de fibres soit amené jusqu'à la surface de collecte de fibres.
  2. Procédé selon la revendication 1, caractérisé en ce que l'arrêt et la remise en marche de la dépression de filature s'effectuent entre une source d'aspiration d'air et la surface de collecte de fibres.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce qu'en vue d'éliminer les fibres non souhaitées pour l'opération de rattachement, le courant de fibres est d'abord conduit en passant au-dessus de l'embouchure du canal d'alimentation, en ce qu'ensuite le courant de fibres est amené brièvement jusqu'à la surface de collecte de fibres, puis est à nouveau conduit en passant au-dessus de l'embouchure du canal, et en ce que le courant de fibres n'est ensuite ramené jusqu'à la surface de collecte de fibres qu'après que l'extrémité de fil ait atteint la surface de collecte de fibres et que l'extraction du fil ait commencé.
  4. Procédé selon la revendication 1 ou plusieurs des revendications 1 à 3, caractérisé en ce que, pour éliminer les fibres non souhaitées pour l'opération de rattachement, une dépression est mise en action à l'extérieur du trajet de transport de fibres, en face de la périphérie d'un cylindre de transport de fibres disposé en aval du cylindre défibreur, au lieu de l'être à la périphérie du cylindre défibreur.
  5. Dispositif d'amorçage de la filature d'un dispositif de filature à fibres libérées comportant un dispositif d'alimentation en ruban de fibres, une enceinte de cylindre défibreur comportant un cylindre défibreur, une surface de collecte de fibres tournant dans une enceinte, un canal d'alimentation conduisant de l'enceinte de cylindre défibreur à la surface de collecte de fibres, une source de dépression destinée à produire la dépression de filature et un orifice d'aspiration situé dans la paroi périphérique de l'enceinte du cylindre défibreur, destiné à l'exécution du procédé selon une ou plusieurs des revendications 1 à 4, dispositif caractérisé par la présence, entre la source (5) de dépression et la surface (33, 150) de collecte de fibres, d'un organe de commutation destiné à la mise en marche et à l'arrêt de la dépression de filature, et d'un dispositif de commutation destiné à la mise en marche et à l'arrêt de la dépression à l'orifice (52) d'aspiration.
  6. Dispositif selon la revendication 5, caractérisé en ce qu'il comporte un dispositif de rétrolivraison du fil destiné à rétrolivrer l'extrémité de fil jusque dans une situation de disponibilité à l'intérieur du tube d'extraction de fil, un dispositif de rejet destiné à libérer l'extrémité de fil en vue de sa rétrolivraison à la surface de collecte de fibres et un dispositif de commande destiné à commander le processus de rattachement de fil et les organes de commutation.
  7. Dispositif selon la revendication 6, caractérisé en ce que les organes (6, 8) de commutation font partie d'un dispositif de commutation grâce auquel la source (5) de dépression peut être raccordée alternativement à la surface (33, 150) de collecte de fibres en tant que dépression de filature, ou à l'orifice (52) d'aspiration en vue de l'aspiration des fibres.
  8. Dispositif selon une ou plusieurs des revendications 5 à 7, caractérisé en ce que l'organe (8) de commutation présente deux alésages (811, 812) de commande, dont l'un peut être amené en alignement avec un premier conduit (50) de dépression allant à la surface (33) de collecte de fibres et l'autre en alignement avec le deuxième conduit (51) de dépression allant à l'orifice (52) d'aspiration.
  9. Dispositif selon une ou plusieurs des revendications 5 à 8, caractérisé en ce que les bords fixes (800, 801, 802, 803) ainsi que les bords mobiles (813, 814, 815, 816) de l'organe (6, 64, 8) de commutation, susceptibles d'être amenés en alignement avec ceux-ci, sont conformés en dispositifs de coupe.
  10. Dispositif selon une des revendications 5 à 9, caractérisé en ce que le dispositif de commutation (6, 8, 85, 512, 9) est actionné dans un sens de déplacement au moyen d'un entraînement de commande (92) tandis que pour le rappel on prévoit un élément formant ressort (612, 622 ; 84 ; 850 ; 516 ; 93).
  11. Dispositif pour l'exécution du procédé selon une ou plusieurs des revendications 1 à 4, comportant une source de dépression destinée à provoquer la dépression de filature, et une ouverture d'aspiration, susceptible d'être commandée, située dans la paroi périphérique de l'enceinte du cylindre défibreur, dispositif caractérisé par une deuxième source (73) de dépression disposée sur un chariot (70) de service susceptible d'être déplacé le long de plusieurs dispositifs de filature, et par un organe (6 ; 512, 9) de commutation destiné à mettre en service alternativement la source (5) de dépression en vue de produire la dépression de filature et la source (73) de dépression en vue d'éliminer les fibres non souhaitées pour l'opération de rattachement.
  12. Dispositif selon une ou plusieurs des revendications 5 à 11, caractérisé en ce que le dispositif de commutation (6, 64, 8, 85, 86, 512, 9) peut être commandé à partir d'un chariot (70) de service susceptible d'être déplacé le long de plusieurs dispositifs de filature.
  13. Dispositif selon les revendications 11 et 12, caractérisé en ce que l'organe de commutation (512) peut être commandé par le déplacement de raccordement d'un conduit (74) d'air aspiré, partant du chariot (70) de service, au dispositif de commutation (512).
  14. Dispositif selon les revendications 11 et 12, caractérisé en ce que l'organe (86) de commutation peut être commandé par la dépression d'un conduit (74) d'air aspiré partant du chariot (70) de service.
  15. Dispositif selon la revendication 14, caractérisé en ce que l'organe (512, 86) de commutation contient une valve anti-retour.
  16. Dispositif selon une ou plusieurs des revendications 5 à 15, caractérisé en ce qu'un cylindre (15) de transport de fibres est monté en aval du cylindre défibreur (14) et en ce que l'ouverture ((52) d'aspiration au lieu d'être disposée dans la paroi périphérique (101) entourant le cylindre défibreur, l'est dans une paroi périphérique (100) entourant le cylindre (15) de transport.
EP85903813A 1984-08-08 1985-08-01 Procede et dispositif pour joindre les fils sur un systeme de filature a fibre liberee Expired - Lifetime EP0226582B1 (fr)

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EP89118965A EP0362899B1 (fr) 1984-08-08 1985-08-01 Procédé et dispositif de rattache pour un métier à filer à bout libre

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DE3429131 1984-08-08
DE3429131 1984-08-08
DE3441677A DE3441677C3 (de) 1984-08-08 1984-11-15 Verfahren und Vorrichtung zum Anspinnen einer Offenend-Spinnvorrichtung
DE3441677 1984-11-15

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EP0226582A1 EP0226582A1 (fr) 1987-07-01
EP0226582B1 true EP0226582B1 (fr) 1992-04-29

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EP85903813A Expired - Lifetime EP0226582B1 (fr) 1984-08-08 1985-08-01 Procede et dispositif pour joindre les fils sur un systeme de filature a fibre liberee

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US (1) US4676059A (fr)
EP (2) EP0362899B1 (fr)
JP (2) JPH0689486B2 (fr)
BR (1) BR8506852A (fr)
CS (1) CS427890A2 (fr)
CZ (1) CZ280898B6 (fr)
DE (3) DE3441677C3 (fr)
IN (2) IN163931B (fr)
WO (1) WO1986001235A1 (fr)

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DE10060300A1 (de) * 1999-12-10 2001-06-21 Rieter Ingolstadt Spinnerei Verfahren und Vorrichtung zum Verstrecken von textilen Fasern
CZ304396B6 (cs) * 2006-05-26 2014-04-16 Rieter Cz S.R.O. Způsob a zařízení k individuálnímu zapřádání příze na pracovním místě rotorového dopřádacího stroje
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Also Published As

Publication number Publication date
DE3441677C2 (fr) 1994-02-24
JPS61502969A (ja) 1986-12-18
DE3585954D1 (de) 1992-06-04
WO1986001235A1 (fr) 1986-02-27
IN166492B (fr) 1990-05-19
CZ280898B6 (cs) 1996-05-15
EP0362899B1 (fr) 1995-12-06
US4676059A (en) 1987-06-30
BR8506852A (pt) 1986-09-23
DE3441677C3 (de) 1994-02-24
EP0226582A1 (fr) 1987-07-01
JPH06212519A (ja) 1994-08-02
EP0362899A1 (fr) 1990-04-11
IN163931B (fr) 1988-12-10
DE3441677A1 (de) 1986-02-20
CZ570885A3 (en) 1996-02-14
JPH0689486B2 (ja) 1994-11-09
DE3588068D1 (de) 1996-01-18
CS427890A2 (en) 1991-12-17

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