EP0362899A1 - Procédé et dispositif de rattache pour un métier à filer à bout libre - Google Patents

Procédé et dispositif de rattache pour un métier à filer à bout libre Download PDF

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Publication number
EP0362899A1
EP0362899A1 EP19890118965 EP89118965A EP0362899A1 EP 0362899 A1 EP0362899 A1 EP 0362899A1 EP 19890118965 EP19890118965 EP 19890118965 EP 89118965 A EP89118965 A EP 89118965A EP 0362899 A1 EP0362899 A1 EP 0362899A1
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EP
European Patent Office
Prior art keywords
fiber
opening
spinning
fibers
vacuum
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.)
Granted
Application number
EP19890118965
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German (de)
English (en)
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EP0362899B1 (fr
Inventor
Eberhard Grimm
Franz Schreyer
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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Filing date
Publication date
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Publication of EP0362899A1 publication Critical patent/EP0362899A1/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 feeding device and an opening roller arranged in a housing, from which the fibers are fed in an air flow generated by the spinning vacuum 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 undesirable for piecing, and the fiber stream being fed via a feed channel mouth to a suction arranged behind the feed channel mouth in the opening roller housing and the fiber stream is fed to the fiber collecting surface only at the beginning of the actual piecing process, and a device for carrying out this method.
  • the opening roller housing is closed to supply air from the outside to remove the unwanted fibers for spinning, with the exception of the feed channel and the suction arranged behind the feed channel mouth on the circumference of the opening roller, so that the fiber stream is fed through the feed channel mouth is led away and sucked off until this vacuum at the circumference of the opening roller is deactivated again at the beginning of the actual piecing process and the opening roller housing is opened again, so that the fibers are now fed back to the fiber collecting area.
  • the opening roller housing By closing the opening roller housing against supply air, the air flow discharged with the aid of the suction must be sucked in through the feed channel, since there is nowhere else in the opening roller housing through which air can penetrate into the opening roller housing. This creates an air flow in the feed channel that is opposite to the normal fiber flight direction during production. This results in exact control of the fiber flow, which leads to safe piecing.
  • the fiber stream gradually reaches its full strength in the feed channel.
  • the procedure according to the invention is such that, after the removal of the unwanted fibers for spinning, only a small proportion of the fiber is initially fed to the fiber collecting surface, while at the same time the remaining fibers are passed over the mouth of the feed channel, so that the thread end is then returned to the fiber collecting surface and that after incorporating the fibers located on the fiber collecting surface, the proportion of fibers fed to the fiber collecting surface is increased.
  • the mouth of the feed channel is only partially released again for feeding in only a small proportion of fibers.
  • the other supply air flows are then switched on again in order to gradually divert the fiber flow to the fiber collection surface in order to be able to control the amount of fiber supplied to the fiber collection surface.
  • the increase in the fiber flow is expediently controlled as a function of the increase in the thread take-off speed in order to avoid a change in the thread number in this spinning phase.
  • the build-up of the fiber accumulation required for piecing takes place at a low fiber delivery rate, so that in the time from the subsequent threading to the incorporation of the pre-fed fibers, not very much fibers can be deposited on the pre-fed fibers. This creates a relatively inconspicuous thread section after the piecing without having to accept a thin spot.
  • 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.
  • the opening roller is followed by a fiber transport roller, it can alternatively be provided that a vacuum outside the fiber transport path on the periphery of this fiber transport roller is brought into effect instead of on the circumference of the opening roller to remove the fibers that are undesirable for spinning.
  • the invention advantageously provides that, for feeding the thread end into the open-end spinning device, the spinning vacuum in the rotor housing is first effective, so that the thread end is only inserted into the spinning device to the extent that it is The fiber collecting surface does not touch, and that the spinning vacuum is then switched off to remove the unwanted fibers for piecing, and the suction arranged behind the feed channel mouth outside the fiber transport path is brought into effect and, after the feed device is switched on again, the fiber stream is led over the feed channel mouth and sucked off until at the beginning the actual piecing process, 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 and the end of the thread is returned to the fiber collecting surface be delivered.
  • a switching device for controlling the vacuum at the suction opening, a controllable supply air opening in the opening roller housing and a control device for timed control the supply air opening and the switching device.
  • This can switch the vacuum to Removing the fibers from the roller housing so that the fibers do not get into the spinning unit, or for feeding the fibers into the spinning unit are adapted exactly to the requirements of piecing.
  • the controllable supply air opening ensures that when the suction opening is subjected to negative pressure, a reversal of the air flow is effected in the feed channel even with unchanged spinning negative pressure. As a result, the fibers are fed into the suction opening over the mouth of the feed channel. This point is not critical since the fibers do not yet have the centrifugal force required to detach them from the opening roller.
  • the controllable supply air opening is preferably arranged in the peripheral wall of the opening roller housing between the feed device and the feed channel mouth.
  • a dirt separation opening is provided in the opening roller housing, it is expedient to design the dirt separation opening as a controllable supply air opening.
  • the supply air flow is assigned a closure member designed as a flap.
  • a flap-like closure member can be easily moved to another position by pivoting and can also be controlled by the air itself.
  • the supply air opening is assigned a closure member which can be moved non-uniformly by a control device.
  • the opening roller housing is also closed against air flows in the area of the feed device.
  • the vacuum source is alternately assigned to the fiber collecting surface as spinning vacuum or the suction opening for suctioning the fibers via the switching device.
  • both the fiber collecting surface and the suction opening can preferably be subjected to negative pressure simultaneously.
  • the fiber feed can be controlled and the type of switchover movement (uniform, non-uniformly accelerated or decelerated movement, etc.) can be used to precisely adapt the switchover of the vacuum conditions to the piecing process in accordance with the fiber material to be processed and the selected spinning conditions.
  • the switching device has two control bores, one of which can be brought into alignment with the first vacuum line leading to the fiber collecting surface and the other can be brought into alignment with the second vacuum line leading 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 switching 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 a second vacuum source is provided on this maintenance trolley according to the invention, 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 unsuitable for piecing .
  • the switching device can advantageously be controlled by the connecting movement of a suction air line coming from the maintenance vehicle to the switching device and / or by the negative pressure in this suction line.
  • the device for controlling the negative pressure can be designed differently, for example as a fan that can be controlled from the maintenance device; however, it advantageously contains a valve, in particular a check valve.
  • Switching the fiber flow does not necessarily have to be done pneumatically by controlling the air flow in the housing.
  • mechanical control of the fiber stream is also possible.
  • a controllable diaphragm covering the mouth of the feed channel is provided in the opening roller housing. This enables the fiber flow to be reversed precisely. It also creates the possibility of a gradual switchover of the fiber stream from the suction opening to the fiber discharge opening and thus to the spinning unit in a simple manner.
  • the closure member is advantageously arranged essentially in the extension of the peripheral wall of the opening roller housing.
  • the closure member is movable parallel to the axis of the opening roller.
  • the closure member has a profile that controls the degree of opening between its area that completely covers the fiber discharge opening and the area that completely clears the fiber discharge opening. This is advantageously designed as a nose. This can initially be a large cross section of the fiber discharge opening are released, which is temporarily reduced again by the nose until finally the full cross section of the fiber discharge opening is finally released.
  • a control device acts on the diaphragm, which moves the diaphragm non-uniformly.
  • the closure member can be moved from the closed position to the open position with changing speed, possibly with a standstill in an intermediate position.
  • the suction opening can be arranged in the peripheral wall surrounding the opening roller instead of in the 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 is there a safe attachment, but also the appearance of the attachment is improved to a considerable extent without additional devices for the controlled drive of the feed device being required for this. In this way, an optimal success rate for piecing is guaranteed.
  • FIG. 1 shows a spinning station of a rotor spinning machine
  • the invention can also be applied to other open-end spinning machines, e.g. Use friction spinning machines with advantage.
  • Each spinning position of the rotor spinning machine shown has an opening device 1 with an opening roller 11 arranged in an opening roller housing 10.
  • opening device 1 is assigned a feeding device 2, which in the exemplary embodiment shown consists of a driven feeding roller 20 and a feeding trough 21, which is elastic cooperates with the feed roller 20.
  • a feeding device 2 which in the exemplary embodiment shown consists of a driven feeding roller 20 and a feeding trough 21, which is elastic cooperates with the feed roller 20.
  • a feeding device 2 which in the exemplary embodiment shown consists of a driven feeding roller 20 and a feeding trough 21, which is elastic cooperates with the feed roller 20.
  • FIG Embodiment In the peripheral wall 101 of the opening roller housing 10 surrounding the opening roller 11 is shown in FIG Embodiment also provided a dirt separation opening 12.
  • 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 release magnet 45 is provided in the vicinity of the thread path between the take-off rollers 41, 42 and the winding roller 43 to release a previously formed piecing return delivery.
  • 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 64 is designed as a rotary body valve. With the help of the switching device 64, the first or the second vacuum line 50, 51 can alternately be connected to the vacuum source 5, which in this way alternately forms the fiber collecting surface 33 of the spinning rotor 30 as a spinning vacuum or the suction opening 52 for suction the fibers 47 is assigned.
  • 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 in 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 changeover device 64 assumes its spinning position, in which, via the first vacuum line 50, the spinning vacuum generated by the vacuum source 5 is applied to the housing 31 and, to a reduced extent, to the mouth 130, and the connection of the second vacuum line 51 to the vacuum source 5 is interrupted is.
  • 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 bound.
  • 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 searched for on the bobbin 44, drawn off from it, shortened to a defined length, brought to the mouth of the thread take-off tube 32, forming a thread reserve above 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 the fiber sappel 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 spinning vacuum is switched off, so that the effect of the spinning vacuum is canceled, the suction air flow brought into effect at the suction opening 52 is sufficient to counteract the action of the fibers 47 to convey the rotating opening roller 11 generated centrifugal force over the mouth 130 of the feed channel 13 to the suction opening 52. In this way it is ensured that the fibers 47, which were milled off in the time from the shutdown phase by the continuous opening roller 11 and thereby shortened, cannot get into the spinning rotor 30 and reduce the strength of the piecing.
  • 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 usually also controls other processes besides piecing and thread break elimination, such as Spool change etc.
  • a thread section with a weaker cross-section is thus formed after the piecer forming a thick spot, to which a second thick spot adjoins. This is disruptive until further processing, especially since it is much longer than the piecing.
  • the amount of fibers fed into the spinning rotor 30 is adapted to the respective thread take-off speed.
  • the increase in the fiber flow between the feed device 2 and the spinning rotor 30 is controlled.
  • the switching of the switching device 64 from the fiber removal position into the spinning position is not carried out abruptly, but gradually so that the increase in the fiber flow takes place as a function of the increase in the thread withdrawal speed.
  • both the fiber collecting surface 33 and the suction opening 52 are simultaneously subjected to negative pressure.
  • the negative pressure acts both in the suction opening 52 and in the housing 31 of the open-end spinning device 3, so that the fibers 47 gradually reach the fiber collecting surface 33 of the spinning rotor 30 with an increasing delivery rate.
  • the fiber stream is first discharged through the suction opening 52, as previously described. Then the switching device 64 is first moved only slightly out of the fiber removal position in the direction of the spinning position, so that the spinning vacuum gradually increases and the vacuum at the suction opening 52 gradually decreases. Initially, only relatively few fibers 47 thus get into the spinning rotor 30, while the remaining fibers 47 are still transported over the mouth 130 of the feed channel 13 and are removed through the suction opening 52. The switching device 64 remains in this position until the slowly building up fiber ring has reached the desired thickness desired for piecing.
  • the end of the thread is returned in a known manner to the fiber collecting surface 33 in the spinning rotor 30 and placed on the fiber ring, integrated there as usual and then withdrawn from the spinning rotor 30.
  • relatively few fibers 47 enter the spinning rotor 30 despite the feed device 2 being switched on, since most of the fibers 47 are sucked into the suction opening 52.
  • the fiber ring thus only grows slowly, so that - after a short, thinner thread section - the thick spot following the piecer is inconspicuous.
  • the thickness of this thinner thread section is determined by the amount of fiber in the fiber ring at the time of spinning, which in turn is determined by the duration of the fiber pre-feeding.
  • the fibers 47 which are already in the spinning rotor 30 at the time of spinning are integrated into the thread end running. After this incorporation, depending on the increase in the thread draw-off, the negative vacuum acting in the spinning rotor 30 is increased more and more, as a result of which the fiber fraction entering the spinning rotor 30 also increases until finally the maximum negative pressure acts at the mouth 130 of the feed channel 13 and the suction opening 52 does not more vacuum is applied so that all fibers 47 now get into the spinning rotor 30.
  • 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 longitudinal sides 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 locking lug 614, behind which a pawl 63 can snap into place.
  • 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 630 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 gradual, i.e. are to be driven very gradually or during their movement phase at changing speeds, 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 actuator 61 is secured by the pawl 63, which is behind the catch nose 614 is engaged.
  • the control button 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 changeover 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 the elongated hole 610, in an intermediate position, 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 during switching the fibers 47 are not suddenly left alone, but are always in a suction air stream.
  • the amount of fiber is precisely matched to the time of piecing. Since the times available for this also become shorter and shorter with increasing piecing speeds and the fibers 47 also arrive in the spinning rotor 30 with a delay which cannot be predetermined with sufficient precision, the provision of a precisely defined amount of fibers in the event of a sudden release of fibers cannot be made possible. However, if the fibers 47 do not suddenly arrive in the spinning rotor 30, but rather with a gradually increased delivery rate, then an exact fiber delivery in the spinning rotor 30 can also be achieved without the time of piecing and the release of the fibers 47 having to be coordinated with one another with tight time tolerances. Since the fiber control for piecing takes place during the transition from the first piecing phase to the second piecing phase, a gradual control of the switching device 6 is also advantageous only in this period, while the switching device 6 can otherwise be switched at any speed.
  • the control device 7 brings both drive bolts 71 and 72 into contact with the actuation buttons 611 and 621, which initially assume the position shown in FIG. 2.
  • the actuating element 62 then pivots the pawl 63, which now releases the actuating element 61.
  • the drive pin 71 now returns to its starting position. However, this return movement does not occur suddenly, but gradually with a predetermined, possibly changing speed, so that the actuating element 61 resting on the drive pin 71 with its actuating button 611 gradually returns to its dashed position.
  • the pawl 63 is released again by releasing the control element 61.
  • the actuating element 61 initially only releases the connection to the second vacuum line 51.
  • the fibers 47 supplied by the delivery device are sucked out of the housing 10 through the suction opening 52 and thus prevented from entering the spinning rotor 30.
  • the elongated hole 610 has also reached such a position that the vacuum acting in the suction channel 63 already has an effect both in the first vacuum line 50 and in the second vacuum line 51. Some of the fibers 47 thus already get into the rotating spinning rotor 30, while another portion of the fibers 47 is still sucked into the vacuum line 51 via the suction opening 52. With increasing adjustment of the control element 61, the vacuum in the first vacuum line 50 is released more and more, while in the second vacuum line 51 the vacuum is throttled more and more. According to this changeover of the switching device 6, i.e.
  • this control element 61 According to the adjustment speed of this control element 61, the supply of fibers 47 in the spinning rotor 30 is gradually increased, so that the amount of fibers required at the moment of piecing can be precisely defined in a simple manner and adapted to the increase in the thread take-off speed. This ensures a high level of safety when piecing.
  • the switchover 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.
  • a simplified switching device 8, which is particularly suitable for actuating a maintenance car 70, will now be described with the aid of FIG. 3.
  • 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 Between the cover 82 and the actuating element 81 is a spring element 84, which thus acts on the actuating 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 switching device 8.
  • the second control bore 812 of the actuating 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.
  • the switching of the switching device 8 can also be carried out gradually, i.e. gradually, perform.
  • each vacuum line 50 and 51 is assigned its own control bore 810 or 811, which can be brought into alignment with the pipe socket 500 and 501 or 510 and 511.
  • one or more fibers 57 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.
  • the edges 813, 814, 815 and 816 of the control bores 811 and 812 and the edges 800, 801, 802 and 803 assigned to them are the pipe socket 500 , 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 control element 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.
  • a simple drive from a maintenance vehicle 70 is possible in that the switching device 64 has a radially outwardly projecting adjusting bolt, which in one direction is driven by the driving bolt 71 (FIG. 2) Maintenance car is acted upon.
  • the resetting can take place with the aid of a spring element designed as a torsion spring.
  • 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 collecting surface 150 on its circumference.
  • the collecting 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 collecting surface 150 and whose width is adapted to the collecting 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 II.
  • 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 this peripheral wall 100, i.e. The suction opening 52 is arranged outside the fiber transport path between the fiber discharge opening 160 and the fiber feed channel 13.
  • the fiber material is released via the feed trough 21 as a sliver 40 by means of the delivery roller 20 roller 14 supplied, by means of which the sliver 40 is separated into fibers 47.
  • the negative pressure in sector I 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 negative pressure in the suction air nozzle 35 and in the negative pressure line 51 is switched off and instead the negative pressure 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.
  • the switching device 9 has an aperture 90, with the aid of which the mouth 130 of the feed channel 13 can either be covered or released.
  • the diaphragm 90 is assigned an actuating device 91, which is only indicated schematically. With the aid of this actuating device 91, the diaphragm 90 can be adjusted by hand or by means of a drive bolt 71 driven by a drive device 92.
  • the actuating device 91 can be designed as desired, for example as a two-armed, possibly cranked lever, as a slide with a run-on slope for the cover 90, which is then also designed as a slide, etc.
  • the cover 90 can be assigned a spring element 93 (FIG. 7).
  • the aperture 90 is arranged essentially in the extension of the peripheral wall 101 of the opening roller housing 10. At its end 907, which is first reached by the fibers 47 transported in the direction of the arrow 46 to the suction opening 52, it has a greater distance a from the opening roller 11 than the part of the peripheral wall 101 which, viewed in the fiber transport direction, before this end 907 is arranged (distance a1). In contrast, the distance b between the opening roller 11 and the end 901 of the diaphragm 90 is that of the the suction opening 52 fed fibers 47 is reached last, smaller than the distance b 1 of the part following this end 908 from the peripheral wall 101 of the housing 10. In addition, according to FIG.
  • the cover 90 overlaps the peripheral wall 101 of the opening roller housing 10 like a roof tile at its first end 907, while the second end 908 of the cover 90 in turn overlaps the peripheral wall 101 like a roof tile. All of these measures ensure that when the mouth 130 is covered, there are no protruding edges on which fibers 47 can get stuck on or in front of the aperture 90, which then release the mouth 130 of the feed channel 13 as fiber chunks into the spinning rotor 30 or onto the friction roller 34 could reach and affect the piecing.
  • the vacuum line 51 ends in a changeover 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 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 closure member 90 releases the mouth 130 of the feed channel 13, while the switching device 512 designed as a check valve takes 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 maintenance carriage 70 actuates the diaphragm 90 with the aid of the drive bolt 71 via the actuating device 91 and pushes it into the closed position, in which it covers the mouth 130 with respect to the interior of the housing 10 receiving the opening roller 11.
  • the spinning rotor 30 is now 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. During the rotor ramp-up or after reaching the rotor operating speed the thread end is returned in the usual way with formation of a thread reserve into 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 mouth 130 of the feed channel 13 is then covered.
  • the connection 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 feed device 2 is switched on again.
  • the fibers 47 fed to the opening roller 11 are thus conveyed over the covered 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 maintenance vehicle 70.
  • Fibers 47 which were previously damaged by the milling roller 11 running while the feed device 2 was stopped, are thus removed and do not get into the spinning rotor 30.
  • the drive pin 71 releases the actuating device 91, which now returns the diaphragm 90 to its basic position, in which the mouth 130 of the feed channel 13 is released.
  • the fibers 47 now enter the spinning rotor 30, where they connect to the end of the thread which has meanwhile reached the spinning rotor 30 by releasing the thread reserve.
  • the thread 4 is then drawn off 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 aperture 90 does not have to reach the spinning rotor 30 or the friction roller 34 in a single and uniform pushing motion. As described using the example in FIG. 1, a substantial improvement in the piecing can be achieved by gradually switching the fiber stream. It has been shown that the Control of the fiber flow can be carried out even more simply and precisely if the negative pressure conditions in the negative pressure lines 50 and 51 are not controlled, but instead the mouth 130 of the feed channel 13 is covered or released. In this case, it is not necessary to control the vacuum in the vacuum line 50 or in the vacuum line 51.
  • the gradual switching of the fiber stream from the suction opening 52 to the fiber discharge opening 130 can therefore take place by gradually opening the mouth 130 through the edge 95 of the screen 90 (FIG. 6).
  • the mouth 130 of the feed channel 13 As long as the mouth 130 of the feed channel 13 is covered, all of the fibers 47 pass through the suction opening 52 into the vacuum line 51. If the mouth 130 is partially covered by moving the aperture 90, part of the fibers 47 transported by the opening roller 11 get into the mouth 130 and thus also in the spinning rotor 30.
  • This partial covering of the mouth 130 of the feed channel 13 reduces the effect of the spinning vacuum at the mouth 130, so that the rest of the fibers 47 transported by the opening roller 11 still reach the suction opening 52, where there is a higher vacuum than at mouth 130.
  • the fibers 47 are not very sluggish, it is not only those fibers 47 that enter the fiber discharge opening 130 that are guided by the air flow circulating with the opening roller 11 just above the open area of the mouth 130. Rather, fibers 47, which are located above the covered area of the mouth 130, are sucked in and entrained by the suction air flow leaving the mouth 130 of the feed channel 13. The proportion of fibers 47 passing through the mouth 130 is thus higher than corresponds to the degree of opening of the fiber discharge opening 130, but the fiber stream can nevertheless be divided easily and reliably in this way.
  • the proportion of the fibers 47 which pass through the mouth 130 into the spinning rotor 30 or to the friction roller 34 is more or less large.
  • the fiber flow distribution can be controlled with more precision with the aid of an aperture 90, the closer it is to the fiber / air flow rotating with the opening roller 11. In addition to preventing fiber from accumulating in front of the screen 90, this is another reason why the screen 90 should form the extension of the peripheral wall of the housing 10 as far as possible.
  • the suction air flow 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 maintenance device 70 withdraws the suction air line 74 at least to the extent that the pin 742 releases the valve cone 515. This is thus brought into contact with its valve seat 518 by the spring element 516.
  • 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 fiber transport and the spinning process gets into the opening roller housing 10.
  • the mouth 130 of the feed channel 13 is closed in that the slide-like diaphragm 90 with its solid area 902 is brought over the mouth 130 and covers it.
  • the mouth 130 is closed when the fiber delivery is turned off, so that there is no risk of fibers 47 becoming trapped.
  • the release of the mouth 130 poses no risk of fiber trapping.
  • control device 7 acts via the drive device 92 on the screen 90 in such a way that it is moved unevenly while it is being moved is brought into its position releasing the mouth 130. This can be done by a continuous, but non-uniform or discontinuous movement.
  • the screen 90 can have a control opening 900. Between its area 901, which completely covers the mouth 130, and the area 902, which causes the mouth 130 to be completely uncovered, it has a profile in the feed channel 13 (FIG. 7) in accordance with the desired fiber flow profile, which is determined by the degree of opening of the mouth 130.
  • control opening 900 has an area 903 which adjoins the area 901 and which completely clears the mouth 130.
  • This area 903 is adjoined by an area 904 which only a reduced cross section of the mouth 130 is released by a profiling designed as a nose 905. This is then followed by the region 902, which causes the mouth 130 to be completely released during the spinning process.
  • the fiber stream is led over the mouth 130 of the feed channel 13.
  • the mouth 130 is opened more and more until the area 903 is released completely.
  • many fibers 47 quickly enter the spinning rotor 30.
  • the thread 4 is spun on and pulled off again at the same time as the fibers are fed into the spinning rotor 30. So that not many fibers 47 can be placed on the fiber ring after spinning, by reducing the free cross-section of the mouth 130, the fiber feed into the spinning rotor 30 is temporarily throttled with the aid of the nose 905. With a rapid increase in the thread take-off speed, the full amount of fibers can then reach the spinning rotor 30 by opening the mouth 130, as shown in FIG.
  • the profiling can have a straight or curved course that increasingly frees the opening cross section.
  • the opening roller housing 10 is closed in the area of the feed device 2 against supply air flows.
  • the housing part 17 has only one sliver feed opening 170, which, however, does not allow uncontrolled supply air flows into or out of the opening roller housing.
  • a changeover device 85 is provided in the vacuum line 51, which alternately blocks or releases the vacuum line 51.
  • the switching device 85 is designed as a slide valve, which is acted upon by a spring element 850 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 cart 70 to the vacuum line 51.
  • the dirt separating opening 12 is assigned a closure member 120, which in the embodiment shown is designed as a flap.
  • Such a device enables the fiber flow to be reversed in a simple manner, without the vacuum in the housing 31 needing to be controlled.
  • the vacuum line 51 is connected to a vacuum source (e.g. 73 on maintenance cart 70), the vacuum of which is higher than the spinning vacuum.
  • the switchover device 85 is brought into its flow-through position against the action of the spring element 850 when the suction air line 74 is placed on the vacuum line 51.
  • the flap-like closure member 120 If the flap-like closure member 120 is now closed, the required air can get air through the only opening remaining in the opening roller housing 10, namely the mouth 130 of the feed channel 13. To prepare for piecing, a vacuum flow of this type is therefore generated on the circumference of the opening roller by closing the closure member 120 such that the air flow is reversed despite the unchanged spinning vacuum. The air flow generated in this way from the feed channel 13 into the suction opening 52 takes away the fibers 47 transported by the opening roller 11 (FIG. 8).
  • the flap-like closure member 120 by partially opening the flap-like closure member 120, the effect of the negative pressure prevailing at the suction opening 52 is reduced to such an extent that the fiber stream is divided. Some of the fibers 47 thus still get into the suction opening 52, while another portion of the fibers reaches the fiber collecting surface 33 through the mouth 130 of the feed channel 13. Depending on the degree of opening of the closure member 120, the air flow in the feed channel 13 is reversed to a greater or lesser extent, so that the proportion of the fiber stream supplied to the fiber collecting surface 33 can be determined by the opening degree of the closure member 120 (FIG. 9).
  • the closure member 120 is moved non-uniformly in order to open the dirt separating opening 12 in accordance with the desired fiber flow profile in the feed channel 13 (FIG. 11).
  • This control is carried out by a suitable control device, which is arranged, for example, on the maintenance car and acts on the flap-like closure member 120 via a drive device 92 (FIG. 5). The control takes place in such a way that thick and thin spots are avoided both in the piecing itself and in the piece of thread adjoining it.
  • the control of the supply air flow for controlling the fiber flow can take place at various points on the opening roller housing 10, for example also on the housing part 17 accommodating the feed device 2. However, if a dirt separating opening 12 is provided, as in the exemplary embodiment shown, this also immediately forms the supply air opening for control of the fiber stream. After the vacuum channel 51 has been spun on and shut off, the dirt separating opening can then be opened or closed as desired, depending on whether or not dirt should be removed.
  • the closure member 120 is located at an uncritical point in the fiber transport. At this point, no fibers 47 emerge from the opening roller housing 10 since they do not have a sufficiently high centrifugal force due to the speed, which is still too low.
  • the housing part 17 and the closure member 120 prevent other supply air flows from entering the opening roller housing 10 apart from the feed channel 13.
  • the fiber stream reacts very sensitively to changes in the vacuum in the vacuum channel 51. This makes it possible, even if there is no dirt separating opening 12 in the opening roller housing 10, to effect precise control of the fiber stream by means of a relatively small change in the vacuum in the vacuum channel 51.
  • control of the vacuum in the vacuum channel 51 or the flap-like closure member 120 can also be carried out here in the manner described using the example of FIGS. 2, 3 and 5 from a maintenance car 70.
  • FIG. 13 Another embodiment of a switchover device 86 is shown in FIG. 13.
  • a flap 860 is provided here, which is articulated above the mouth 861 of the vacuum line 51 facing the service vehicle 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 indicated by dashed lines in FIG. 13.
  • the flap 860 assumes the position shown in full lines, the sealing abutment of the flap 860 on the Mouth 861 is still supported by the negative pressure prevailing in the opening roller housing 10. If, after creating the mouth 740 of the suction air line 74 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 switchover 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 car 70 and the vacuum line 51 with a connected or not connected to the spinning machine 36 provided vacuum source, 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. In principle, the fiber flow can be controlled by changing the vacuum ratio, whereby either the spinning vacuum or the suction vacuum or both vacuum pressures can be changed.

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

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE3429131 1984-08-08
DE3429131 1984-08-08
DE3441677 1984-11-15
DE3441677A DE3441677C3 (de) 1984-08-08 1984-11-15 Verfahren und Vorrichtung zum Anspinnen einer Offenend-Spinnvorrichtung
EP85903813A EP0226582B1 (fr) 1984-08-08 1985-08-01 Procede et dispositif pour joindre les fils sur un systeme de filature a fibre liberee

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP85903813.5 Division 1985-08-01

Publications (2)

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EP0362899A1 true EP0362899A1 (fr) 1990-04-11
EP0362899B1 EP0362899B1 (fr) 1995-12-06

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EP89118965A Expired - Lifetime EP0362899B1 (fr) 1984-08-08 1985-08-01 Procédé et dispositif de rattache pour un métier à filer à bout libre
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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IT1227729B (it) * 1988-12-23 1991-05-06 Savio Spa Procedimento e dispositivo per la rimozione delle fibre deteriorate durante il riattacco del filo in un filatoio open-end
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Also Published As

Publication number Publication date
EP0362899B1 (fr) 1995-12-06
WO1986001235A1 (fr) 1986-02-27
DE3441677C2 (fr) 1994-02-24
CZ570885A3 (en) 1996-02-14
IN163931B (fr) 1988-12-10
IN166492B (fr) 1990-05-19
DE3441677C3 (de) 1994-02-24
DE3441677A1 (de) 1986-02-20
JPH0689486B2 (ja) 1994-11-09
DE3588068D1 (de) 1996-01-18
DE3585954D1 (de) 1992-06-04
JPH06212519A (ja) 1994-08-02
BR8506852A (pt) 1986-09-23
CZ280898B6 (cs) 1996-05-15
JPS61502969A (ja) 1986-12-18
EP0226582A1 (fr) 1987-07-01
US4676059A (en) 1987-06-30
EP0226582B1 (fr) 1992-04-29
CS427890A2 (en) 1991-12-17

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