EP0274016B2 - Verfahren und Vorrichtung zum Anspinnen einer Offenend-Spinnvorrichtung - Google Patents

Verfahren und Vorrichtung zum Anspinnen einer Offenend-Spinnvorrichtung Download PDF

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Publication number
EP0274016B2
EP0274016B2 EP87115943A EP87115943A EP0274016B2 EP 0274016 B2 EP0274016 B2 EP 0274016B2 EP 87115943 A EP87115943 A EP 87115943A EP 87115943 A EP87115943 A EP 87115943A EP 0274016 B2 EP0274016 B2 EP 0274016B2
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EP
European Patent Office
Prior art keywords
thread
bobbin
draw
roller
spinning
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP87115943A
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German (de)
English (en)
French (fr)
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EP0274016A2 (de
EP0274016A3 (en
EP0274016B1 (de
Inventor
Walter Mayer
Kurt Lovas
Stephan Dipl.-Ing. Wittmann (Tu)
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Rieter Ingolstadt Spinnereimaschinenbau AG
Original Assignee
Rieter Ingolstadt Spinnereimaschinenbau AG
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Application filed by Rieter Ingolstadt Spinnereimaschinenbau AG filed Critical Rieter Ingolstadt Spinnereimaschinenbau AG
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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

Definitions

  • the present invention relates to a method for piecing an open-end spinning device, in which the thread is drawn off a bobbin, cut off and the thread end is introduced into the thread take-off tube with formation of a thread reserve, the thread end not reaching into the interior of the spinning rotor, and the thread end by dissolving the thread reserve for spinning back to the fiber collecting surface of the spinning rotor, from where the thread spun on is withdrawn, and a device for carrying out this method.
  • the thread withdrawn from the spool is brought to be spun in front of the mouth of the thread take-off tube (DE-OS 20 12 108). Then the piecing thread is inserted into the thread take-off tube by turning back the bobbin using the negative pressure of the spinning and immediately returned to the collecting groove of the spinning rotor. Because of the inertia of the bobbin, the dwell time of the thread in the spinning rotor is quite large, so that - especially at higher rotor speeds - there is a risk that the thread will be overturned and a thread breakage will occur.
  • the object of the invention is therefore to provide a method and a device which avoid these disadvantages and enable good piecing at high spinning speeds.
  • the thread according to the invention is brought to such a length that the thread end fed to the thread take-off tube to form the thread reserve extends to the mouth of the thread take-off tube, and that the thread end from this position for insertion into the spinning device by return delivery by a certain amount Distance is brought into a standby position within the thread take-off tube, this distance being determined as a function of the diameter of the fiber collecting surface of the open-end spinning device.
  • the return time of the thread for making contact with the fibers in the spinning rotor is always the same in this way, so that the same conditions are always set for contacting the thread end regardless of the diameter of the fiber collecting surface. This leads to a significantly simplified and precise time control and allows starting even at high spinning speeds. Precise attachments of high quality are achieved.
  • the withdrawal of the re-spun thread begins at a time-definable interval for releasing the thread reserve, so that an adaptation to different materials etc. is possible.
  • the provision of the thread end for piecing takes place advantageously in that the return delivery to the standby position is carried out by renewed return delivery from the bobbin.
  • this release of the thread reserve is preferably carried out by throwing off the thread.
  • the twist necessary for attachment in the thread can be individually adapted to the thread.
  • the thread take-off is soft, which also favors piecing at high spinning speeds. The number of thread breaks during piecing is reduced and the tensile strength in the piecing is increased significantly.
  • the auxiliary trigger can take place independently of the winding or also exclusively through the coil. After a short time, which is sufficient for the auxiliary draw to reach its full speed, the thread is transferred to the draw-off roller pair. Since the thread is already being drawn off the open-end spinning device at full speed at this point, there is no jump in speed, so that there is no risk of thread breaks at this point either.
  • the start-up of the thread draw-off is accelerated more gently with a smaller amount of fiber effective in the open-end spinning device and more rapidly with a larger amount of fiber effective in the open-end spinning device.
  • less fiber material is required in the open-end spinning device at the moment the thread take-off is inserted, i.e. the dwell time between the end of the return delivery and the start of the thread take-off can be kept shorter, so that the excessive amount of fibers otherwise leading to a thick point in the thread thickness in the open-end spinning station can be avoided, while at the same time the yarn strength due to the correct rotation propagation in the open-end spinning device does not fall off compared to the thread piecings previously produced in the usual way.
  • the pressure roller of the pair of draw-off rollers is lifted off the driven roller before the re-spinning, the thread is presented to the draw-off tube after being cut to length, so that the thread takes a curved course over the driven roller, and is put back on to insert the normal spinning take-off, when the bobbin has reached the full winding speed.
  • a precise and gentle insertion of the thread take-off can be achieved, wherein control of the pressure roller from a maintenance device, which can be moved along a large number of open-end spinning stations, enables a particularly economical device.
  • the pressure roller of the draw-off roller pair is lifted from the driven roller, that the bobbin is also released from the main drive, that the thread is then pulled off of the bobbin while being turned back, guided over a throwing-off device, to a defined length Then the trimmed thread end is brought in front of the mouth of the thread take-off tube and thereby gets between the driven roller and the pressure roller of the pair of draw-off rollers and is then returned to the ready position in the thread take-off tube, whereupon the throwing-off device throws off the thread, which is now caused by the negative pressure prevailing in the spinning device the fiber collecting surface is supplied, that the newly spun thread is then drawn off the fiber collecting surface with increasing speed and that finally, after reaching the full winding speed, the bobbin is lowered onto the main drive d the pressure roller is placed back on the driven roller of the pair of draw rollers.
  • a length measuring device that can be adjusted to the diameter of the fiber collecting surface is provided for returning the thread end to a standby position within the thread take-off tube, so that the same way of piecing return is always achieved regardless of the diameter of the fiber collecting surface.
  • the purpose of the length measuring device is to bring the thread into a predetermined ready position, while the throwing device enables the thread to come into contact with the fibers fed to the open-end spinning device.
  • the length measuring device can be adjusted to the respectively selected diameter of the fiber collecting surface of the spinning element in order to always provide constant piecing returns through the thread-pulling device and thus also constant piecing conditions, even if the open-end spinning device can be operated with fiber collecting surfaces of different diameters.
  • the piecing back delivery can also be set for different diameters of the fiber collecting surface.
  • an auxiliary take-off device is provided which is arranged at a greater distance from the open-end spinning device than the pair of take-off rolls. This enables piecing at particularly high speeds of the spinning element.
  • the auxiliary take-off device is designed as a pair of auxiliary pulling rollers, which is particularly advantageous in connection with a thread connecting device replacing the piecing device, which is why in a further embodiment of the Er Finding object between the pair of draw-off rollers and the pair of auxiliary draw-off rollers, a thread connecting device can be brought into the thread path.
  • the auxiliary take-off device is formed by the spool and a drive roller that can be driven in both directions of rotation, the drive of the drive roller being expediently adjustable in adaptation to the start of the fiber feed effective in the open-end spinning device.
  • This device enables the thread take-off in this way To go up to full speed so that speed jumps are avoided so that there is no risk of thread breaks.
  • the drive roller can, according to the invention, wear a jacket made of a soft material, preferably soft rubber.
  • the measure that a pressure device is assigned to the drive roller, by means of which the drive roller is pressed against the coil with increasing coil diameter with increasing contact pressure, can ensure that the same coil acceleration is always achieved regardless of the coil diameter.
  • the drive roller is pressed against the spool on the side facing away from the spooling roller, then depending on the size of the spool, different positions of the drive roller are obtained when driving the spool, so that the instantaneous diameter of the spool has an effect.
  • a compact design of the auxiliary coil drive is achieved according to the invention in that the drive roller is carried by a swivel arm on which a torsion spring acts.
  • the drive roller is carried by a swivel arm, the drive of which has a rotatable cam disk and an adjustable intermediate linkage between the cam disk and swivel arm.
  • the intermediate linkage enables the swivel arm to be adjusted in a particularly simple manner.
  • a lifting element which can be inserted between the winding roller and the bobbin, and a support device which can be brought into action on the bobbin arms and which, after the lifting element has been withdrawn, ensures a constant distance between the peripheral surface of the bobbin and the winding roller.
  • the bobbin is immediately lifted off the winding roller when a thread break occurs. This can happen so quickly that the end of the broken thread no longer reaches the bobbin and hangs freely from the bobbin. It is particularly easy to pick up the thread for the return delivery.
  • the lifting element is designed so that a defined distance is formed between the bobbin and the winding roller, so that the instantaneous diameter of the bobbin affects the working position of the drive roller, which cooperates with the side of the bobbin facing away from the bobbin roller.
  • the support device has a drive lever which can be pivoted by a controllable drive, and a support lever which is arranged thereon and can be pivoted between two end positions and which is acted upon by an elastic element in the direction of the coil and thereby into its first end position and at Heading onto one of the two coil arms can be brought into its second end position, which is assigned a switching device for ending the pivoting movement of the drive lever.
  • a switching device is actuated mechanically.
  • the controllable drive for the drive lever is designed as an electric motor and the switching device is designed as an electrical switch arranged on the drive lever, which interrupts the power supply to the motor when actuated by the support lever.
  • a design is particularly advantageous in accordance with which the pressure roller, which can be lifted off from the driven take-off roller by a maintenance device which can be moved along a large number of open-end spinning devices, and can be put back on the driven take-off roller.
  • a maintenance device which can be moved along a large number of open-end spinning devices, and can be put back on the driven take-off roller.
  • the object of registration creates the conditions for the fact that even at high rotor speeds speeds can be safely spun, so that an exact timing of the attachment process to the run-up curve of the spinning rotor is not necessary. This results in a significant simplification of the control, which allows large time tolerances and is therefore easy to master.
  • FIG. 1 shows the essential parts of a spinning machine 1 operating according to the open-end spinning process, insofar as they are necessary to understand the explanation. In practice, these parts are generally distributed over the spinning machine 1 and a maintenance device 2 which can be moved along the spinning machine 1, but it is also possible to provide all the elements shown on the spinning machine 1 itself and to dispense with the maintenance device 2, in particular in the case of test machines with one or only a few spinning positions.
  • the spinning machine 1 shown has a large number of spinning positions, of which FIG. 1 only shows one spinning position.
  • An open-end spinning device with a spinning element arranged in a housing 10, a pair of take-off rollers 13 and a winding device 30 are provided for each spinning station.
  • a spinning rotor 11 is used, for example, as the spinning element, which generates a thread 3 which, after incorporation in the usual manner, with the aid of a fiber delivery device and a dissolving device - e.g. in the form of an opening roller - fibers fed to the spinning element are drawn out of the housing 10 by means of the pair of draw rollers 13 through a draw tube 12.
  • a thread monitor 36 is arranged in the thread path between the housing 10 and the pair of draw-off rollers 13.
  • the spinning machine 1 has a winding device 30, which essentially has a main drive roller 31 for driving the bobbin 33, which is interchangeably received by two pivotable bobbin arms 32.
  • the coil arms 32 are pivotable about an axis 34.
  • a thread tension compensation bracket 14 is arranged in a known manner in the thread path between the draw-off roller pair 13 and the bobbin 33.
  • a part of a spool lifting device 4 forming lever element 40 is also provided per spinning station, which lifts the latter by a certain value a from the main drive roller 31 by being inserted between the main drive roller 31, so that a due to the strength of the lifting element 40 Defined distance a between the peripheral surfaces of the coil 33 and the main drive roller 31 is formed.
  • a suction pipe 20 is arranged on the maintenance device 2 and can be brought to the underside of the bobbin 33 lifted off the main drive roller 31 in order to be able to pick up the end of a broken thread 3 there.
  • the suction tube 20 has a cranked shape and has a longitudinal slot (not shown) on its side facing the spinning machine 1, so that the thread 3 can partially leave this slot in the form of a chord as it enters the suction tube 20.
  • the maintenance device 2 also carries a pair of auxiliary rollers 21 which is supported by a lever 23 which can be pivoted about an axis 22 such that the pair of auxiliary rollers 21 can grip the thread 3 arranged tendon-like to the suction tube 20 and feed it to the draw-off tube 12.
  • a coil auxiliary drive 5 is arranged on the maintenance device 2.
  • the coil auxiliary drive 5 has a swivel arm 50 which is pivotably mounted on an axis 51 and carries a roller 52 at its free end, which can be driven in a manner not shown by a drive, not shown, in either direction.
  • the roller 52 is surrounded by a jacket 53 made of soft rubber or another soft material.
  • a swivel drive 6 for the swivel arm 50 is further arranged on the maintenance device 2, which in the embodiment shown has a camshaft 61 driven by a motor 60, on which a cam disk 62 is arranged.
  • a two-armed lever 64 is pivotably mounted, at one end of which the cam disk 62 can engage and at the other end of which an actuator 65 is connected.
  • This actuator 65 the free end of which is connected to the swivel arm 50, consists in the embodiment shown of two bolts 66 and 67, which have opposite threads and on which a threaded sleeve 68 is screwed with opposite threads, so that by rotating the threaded sleeve 68 Distance between the lever 64 and the pivot arm 50 can be changed. In this way, a precise adjustment of the lever 64 to the swivel arm 50 is possible.
  • the cam plate 62 causes the roller 52 to be lifted off the spool 33, while a tension spring 7 acting on the swivel arm 50 causes the swivel arm 50 to move when the He bels 64 supported by the cam disk 62 on the coil 33.
  • the support device 8 consists essentially of a pivotably mounted drive lever 80, on the free end of which a support lever 81 is articulated.
  • This two-armed support lever 81 is movable between two stops 82 and 83 attached to the drive lever 80 and is acted upon by means of an elastic element designed as a compression spring 84, which is supported at one end on the drive lever 80 and at the other end on the support lever 81, so that the support lever 81 is normally supported on the stop 82.
  • a switch 85 is provided on the drive lever 80 so that the support lever 81 actuates this switch 85 when it rests on the stop 83 without being supported on the switch housing.
  • the switch 85 is electrically connected to a motor 86 which serves as a pivot drive for the drive lever 80 and secures the drive lever 80 in its current position when it is stopped.
  • the motor 86 is connected to a control device 9, which is also connected to the motor 60.
  • the opening roller (not shown) which continues to run even after the fiber delivery device is stopped, the fiber beard projecting into the working area of the opening roller is milled and fed to the spinning rotor 11 together with the fibers in the clothing of the opening roller.
  • a signal is triggered in a known manner, which either causes the maintenance device 2 or which causes the continuously rotating maintenance device 2 to stop at the disturbed spinning position in order to remedy the broken thread.
  • a control device 9 temporarily switches on a rotor cleaning device (not shown), as a result of which the fibers in the spinning rotor 11 are removed from it in a manner known per se. Furthermore, in a manner not shown, the maintenance device 2 lifts the pressure roller of the pair of draw-off rollers 13 from the driven roller.
  • the drive lever 80 is pivoted upward with the support lever 81 with the aid of the motor 86. During this movement, the support lever 81 resting on the stop 82 comes to rest against the arm 35 of the spool arm 32. As a result, the support lever 81 is pivoted relative to the drive lever 80 against the action of the compression spring 84 until it bears against the stop 83.
  • the support lever 81 actuates the switch 85, which thereby opens and thus interrupts the power supply to the motor 86.
  • the lifting movement of the drive lever 80 is thus ended and this lever is fixed in the current position.
  • the control device 9 causes the lifting element 40 to be withdrawn so that it releases the coil 33. This can be done by mechanical action from the maintenance device 2 on the lifting element 40 or by actuation of an electrical element, not shown, which brings about this relationship.
  • the spool 33 remains in its current position since it is supported by the support lever 81.
  • the control device 9 After release of the bobbin 33 by the lifting element 40, the control device 9, in a manner not shown, causes the suction tube 20 to be brought into the thread take-up position. In this position, the suction tube 20 is located on the underside of the coil 33, so that the distance between the suction tube 20 and the coil 33 is essentially the same regardless of the coil diameter.
  • the control device 9 switches on the motor 60, which causes the camshaft 61 to rotate. In this way, the cam disk 62 releases the lever 64, so that the roller 52 is brought into contact with the coil 33 by the action of the tension spring 7 on the swivel arm 50.
  • the tension spring 7 is more or less tensioned so that with a larger coil diameter the contact pressure of the roller 52 with the coil 33 is greater than with a smaller coil diameter. If the roller 52 is now driven via return means (not shown) for returning the thread 3, this different contact pressure compensates for the inertia and avoids a different slip which would otherwise occur due to the different masses of the bobbin 33.
  • the thread 3 is only loosely on the by the rapid stopping of the bobbin 33 with the aid of the lifting element 40 Coil circumference lies, sucked into the suction pipe 20, and in the course of the suction it partly exits the suction pipe 20 again in the form of a chord due to the cranked shape of the suction pipe 20.
  • the return delivery of the thread 3 is interrupted by control from the control device 9 and the suction tube 20 is brought into its position shown in broken lines.
  • the auxiliary roller pair 21 is pivoted out of a rest position about the axis 22, this auxiliary roller pair 21 passing through the course of the thread 3 entering the slot of the suction tube 20.
  • the thread on the side of the auxiliary roller pair 21 facing away from the bobbin 33 is separated by conventional means, not shown, and the auxiliary roller pair is pivoted in front of the mouth of the draw-off tube 12.
  • the spinning rotor 11 or another open-end spinning element has meanwhile been rotated again and the fiber feed on the fiber collecting surface has been switched on again.
  • the thread 3 is returned again by rotating the bobbin 33 and the pair of auxiliary rollers 21 until it reaches the fiber collecting surface of the spinning rotor 11 or another open-end spinning element, whereupon the clamping of the auxiliary roller pair 21 is released, for example by lifting the further from the roller 22 arranged from the roller closer to the axis 22.
  • the thread 3 is released from the auxiliary roller pair 21.
  • the auxiliary roller pair 21 now returns to its rest position.
  • the roller 52 is driven in the opposite direction, so that the thread 3 is pulled out of the spinning rotor 11.
  • the thread 3 is thus drawn off from the spinning rotor 11 exclusively by the bobbin 33 in this piecing phase.
  • the drive of the fiber delivery device is switched on at a moment which is coordinated with the return delivery and renewed removal of the thread 3. Since the previously emptied clothing of the opening roller has to be filled again until the full fiber flow can get into the spinning rotor 11, there is a soft effect of the fiber delivery with regard to the spinning rotor 11. In accordance with this effect of the fiber delivery, the thread draw-off should also become “soft” in order to ensure a piecing of high strength and, on the other hand, to avoid an excessively large jump in the thread tension and thus thread breaks.
  • the roller 52 is thus accelerated to the normal winding speed in a relationship which is adapted to the effect of the fiber delivery in the spinning rotor 11, the inevitable slippage of the coil 33 being taken into account when the roller 52 is accelerated.
  • the choice of a corresponding spring constant, length and tension of the tension spring 7, regardless of the respective bobbin diameter, keeps the slip in such a way that it does not or only falsifies the thread take-off speed within tolerable limits.
  • the bobbin 33 is lowered by pivoting the drive lever 80 onto the main drive roller 31 and the roller 52 is lifted off the bobbin 33 by the action of the cam disk 62 on the lever 64. Furthermore, the pressure roller of the pair of draw rollers 13 is released by the maintenance device 2.
  • the described method is not restricted to the exemplary embodiment shown.
  • the device can also experience modifications in the context of technical equivalents or other combinations of features.
  • the auxiliary roller pair 21 is assigned a thread separation device in the usual way, which brings the thread 3 to a certain length.
  • the auxiliary roller pair 21 is known to be assigned a return delivery measuring device which determines the number of rotations of the auxiliary roller pair 21 and thus the return delivery amount of the thread 3.
  • a throwing member 25 deflecting the thread 3 can be provided in the thread path between the pair of draw-off rollers 13 and the bobbin 33.
  • the thread 3 When the thread 3 is sucked out of the bobbin 33, the thread 3 arrives at the ejection element 25.
  • the thread 3 When the thread 3 is subsequently fed to the draw-off tube 12 and fed to the draw-off tube 12 after cutting to a predetermined size, the thread 3 takes a curved course .
  • the mentioned return delivery measuring device - which is designed, for example, as a timing element that controls the duration of the current supply to the drive motor of the auxiliary roller pair 21 - the auxiliary roller pair 21 is driven by a predetermined number of rotations in the return delivery direction.
  • the thread end in the thread take-off tube 12 reaches a precisely defined position, which is identified in FIG. 1 as position B 1 .
  • This position B 1 the thread end is between the two ends of the thread take-off tube 12, where it is held securely by the negative pressure acting in the spinning device.
  • This position B 1 is selected so that its distance along the thread take-off path is essentially the same as the additional thread path, which is caused by the deflection by the take-off element 25 compared to the normal course of the thread between the pair of draw rollers 13 and the bobbin 33.
  • the pair of auxiliary rollers 21 now releases the thread 3 and can thus be pivoted away from the area of the mouth of the draw-off tube 12.
  • the throwing member 25 now throws off the thread 3, the end of which comes from the ready position B 1 to the area of the fiber collecting surface of the spinning rotor 11 chosen as an example, where it integrates the fibers that have now been fed in.
  • the piecing take-off by the bobbin 33 now begins in time with the thread dropping by the throwing member 25.
  • the released thread length is essentially the same length as the distance of the standby position B along the thread withdrawal path from the collecting surface - i.e. Collecting groove of the spinning rotor 11 - is; However, it must be taken into account in the thrown-off thread reserve that the thread end must be able to lay down in the collecting groove of the spinning rotor over a certain length of the circumference in order to break open and bind in the fiber ring.
  • the return delivery measuring device can be adjusted depending on the diameter selected in each case. If, for example, the return delivery measuring device is designed as a digitally adjustable time relay, it is sufficient to specify the corresponding time as a digital value in accordance with the selected diameter, as a result of which the working time of the drive motor for the auxiliary roller pair 21 and thus also the return delivery path of the thread 3 is determined.
  • a spinning rotor 110 is shown in dashed lines in FIG. 1 and has a larger diameter than the spinning rotor 11. So that regardless of this diameter always the same, can be provided by the ejector 25 way of piecing back delivery, the timing relay is adjusted to a larger rotor diameter, higher time, so that the auxiliary roller pair 21 delivers the thread 3 to the standby position B 2 .
  • the actual piecing return is carried out by the described ejection device 25.
  • the auxiliary trigger for the piecing process takes place exclusively by individually driving the coil 33, but it is also conceivable to make this auxiliary trigger independently of the coil 33.
  • an additional pair of auxiliary take-off rollers 900 can be brought into the thread path in the vicinity of the bobbin 33 for the piecing take-off from the maintenance device 2.
  • pulling off the thread 3 in the piecing phase exclusively by the bobbin 33 is particularly advantageous, since in this way no additional elements are required for the piecing draw-off, but a corresponding choice of the elastic element, for example, designed as a tension spring 7, is sufficient for this.
  • Such a modification with a pair of auxiliary take-off rollers 900 is described below with reference to FIGS. 3 and 4. Since such an embodiment is particularly expedient if it is used in connection with a thread connecting device 97 (eg knotter, splicing device etc.), with the help of which the company produced during piecing If the connection (piecing) is replaced by another type of thread connection, this modification is described in connection with such a thread connecting device 97.
  • a thread connecting device 97 eg knotter, splicing device etc.
  • the auxiliary take-off roller pair 900 - which is provided on the side of the take-off roller pair 13 facing away from the spinning rotor 11 - is located in the exemplary embodiment shown, like the various elements described below, on the maintenance device 2 and can be brought into its working position if necessary.
  • the thread 3 is inserted into the pair of auxiliary draw-off rollers, if this is in the vicinity of the course of the thread sucked into the suction tube 20, with the aid of means not shown and customary for such purposes.
  • the mouth 91 of a thread suction device 90 can be brought into the thread run so that it can take up the excess thread when the tension in the thread section between the auxiliary take-off roller pair 900 and the bobbin 33 decreases.
  • a cutting device 92 is assigned to the mouth 91 of this thread suction device 90 and can be controlled in a suitable manner.
  • the cutting device 92 is arranged on an arm 94 which can be pivoted about an axis 93, but it is also possible to fasten this device to the thread suction device 90 in front of the mouth 91.
  • On the side of the cutting device 92 facing away from the mouth 91 there is also a thread clamp 95 which, in the embodiment shown, is actuated together with the cutting device 92 with the aid of an electromagnet 96.
  • the thread connection device 97 already mentioned and designed, for example, as a knotter, is arranged in the thread run between the pair of draw-off rollers 13 and the auxiliary draw-off roller pair 900.
  • a thread storage device 98 is located between the pair of draw-off rollers 13 and the thread-connecting device 97.
  • a deflection member 99 is provided between the thread-connecting device 97 and the auxiliary draw-off roller pair 900, which keeps the thread extending to the bobbin 33 together with a suction nozzle 24 on a precisely defined thread path.
  • This suction nozzle 24 can be brought into the position shown in FIG. 4 from a thread take-up position in which it receives the thread section extending from the bobbin 33 to the thread clamp 95.
  • the suction nozzle 24 is now brought into the area of the thread path between the bobbin 33 and the thread clamp 95.
  • the backward rotation of the coil 33 is continued.
  • the thread clamp 95 releases the thread 38, which is now taken up by the suction nozzle 24. If the thread length taken up by the suction nozzle 24 ensures that the thread 38 is held securely even when the suction nozzle 24 is pivoted, it is brought into a position shortly after the pair of take-off rollers 13 - viewed in the direction of thread take-off from the thread take-off tube 12.
  • the thread deflecting element 99 is then pivoted into the course of the thread between the bobbin 33 and the suction nozzle 24, as a result of which the thread 38 is deflected.
  • the thread 3 which extends from the thread suction device 90 to the suction tube 20 and is inserted into the auxiliary take-off roller pair 900, is picked up by the auxiliary roller pair 21, brought to the length required for piecing and fed to the suction tube 12.
  • the auxiliary roller pair 21 and the auxiliary take-off roller pair 900 are now turned back simultaneously and synchronously, so that the thread 3 is returned to the spinning rotor 11.
  • the clamping of the auxiliary roller pair 21 is released, whereupon this auxiliary roller pair 21 can return to its starting position.
  • the clamping of the auxiliary take-off roller pair 900 whose direction of rotation is now reversed, is maintained.
  • the thread 3 is withdrawn again from the spinning rotor 11.
  • the thread 3 is fed to the thread suction device 90, which receives the spun thread 3.
  • the thread 3 is released over a very long length in the take-up phase.
  • the rotations in the thread 3 generated by the spinning rotor 11 rotating at full speed can thus be distributed over a long length, so that the resistance compared to the propagation of rotation up to the collecting surface (collecting groove), which is generated by the thread deflection at the mouth of the thread take-off tube 12 facing the spinning rotor 11, a substantially longer time is sufficient to prevent excessive rotation in the thread section located in the spinning rotor 11.
  • a more or less high speed of the spinning rotor 11 can be selected within certain maximum limits.
  • the suction nozzle 24 and the deflection element 99 assume such a position with respect to the course of the thread drawn out of the spinning rotor 11 by the auxiliary take-off roller pair 900 that the thread section between the suction nozzle 24 and the deflection element 99 runs essentially parallel to the thread section between the thread take-off tube 12 and the auxiliary take-off roller pair 900 .
  • the coil 33 is now stopped.
  • the thread store 98 is then pivoted into the course of the thread drawn out of the thread take-off tube 12 by the auxiliary take-off roller pair 900.
  • the thread connecting device 97 is then brought into the course of the threads 3 and 38. While the thread connection process is being carried out, both threads 3 and 38 must be stopped in its working area. This is done in that the thread quantity supplied by the spinning rotor 11 is temporarily stored by the thread store 98, while the thread 38 is not moved anyway by stopping the bobbin 33. In the course of the thread connection process, the two threads extending to the thread suction device 90 and to the suction nozzle 24 are cut off and removed.
  • the thread connecting device 97 releases the thread which now extends again from the spinning rotor 11 to the bobbin.
  • the bobbin 33 is lowered onto the main drive roller 31 and driven again by it, the thread store 98 gradually being emptied again.
  • the deflecting element 99 now also releases the thread again, so that it resumes the thread path customary for production.
  • the cutting device 92 and the thread clamp 95 are not actuated. Simultaneously with the insertion of the piecing take-off by the auxiliary take-off roller pair 900 or shortly thereafter, the bobbin 33 is brought back into contact with the main drive roller 31 and, in a manner known per se, the thread is released from the auxiliary take-off roller pair 900 in a manner known per se.
  • the run-up speed can be freely selected; at high thread take-off speeds, however, it is expedient for the reasons already described if the run-up curve is adapted to the run-up curve of the fiber feed effective in the spinning rotor 11.
  • the spool lifting device 4 engages the spool arm 32 or an arm 35 attached to it and at the same time forms the support device 8, i.e. holds the bobbin 33 with its imaginary axis in a particular lifting position during the entire thread break repair.
  • the position of the swivel arm 50 of the auxiliary coil drive 5 changes in accordance with the coil size, so that the tension spring 7 also generates a different roller pressing force depending on the coil diameter.
  • only the radius of the coil 33 that is to say half its diameter, has an effect on the tension spring 7.
  • the coil 33 is assigned a light barrier monitoring, it can also be used to lift the coil 33 such that the distance a between the circumference of the coil 33 and the circumference of the main drive roller 31 is always the same regardless of the coil diameter. In this way, as in the exemplary embodiment described with reference to FIG. 1, the entire diameter of the coil 33 can be used for changing the spring tension.
  • Such light barrier monitoring can also be used when a support device 8 is provided, but does not have separate drive and support levers.
  • a switching device is provided, which in the embodiment shown is designed as a switch 85. If desired, a shift linkage can also be provided in its place, which causes the drive lever 80 to be uncoupled from the motor 86 and fixed in its current position (for example with the aid of a pawl).
  • the stops 82 and 83 can either be arranged on the drive lever 80 or on the support lever 81 or can be divided between the two levers.
  • the support device 8 does not have to be supported on an additional arm 35 of the coil arm 32, but can also engage the same or an extension thereof.
  • FIG. 2 shows a further modification of the device, in which a torsion spring 70 is provided, one leg 71 of which is supported on the swivel arm 50 and the other leg 72 of which is supported on a bearing 54 which receives the axis 51 of the swivel arm 50. As Figure 2 shows, such an embodiment is particularly compact.
  • the roller 52 in the embodiment described has a jacket 53 made of soft rubber or another material. This results in an enlargement of the contact surface of the roller 52 on the spool 33, since the jacket 53 seeks to laterally avoid the contact pressure acting on it.
  • the roller 52 can even have a smooth surface despite good drive entrainment, so that the material wound on the spool 33 is treated gently in comparison with, for example, an all-metal roller with a corrugation or the like provided on the circumference, which of course also is possible.
  • the various elements - such as intake manifold 20, swivel arm 50 and drive lever 80 or the elements not shown - can be driven in various ways, for example with the aid of pneumatic or hydraulic pistons.
  • the design shown with an adjustable intermediate linkage 64, 65, 66, 67, 68 is particularly advantageous if the engine 60 drives various cam disks 62 via the camshaft 61, for example for the movement of the suction tube 20 and / or for the pivoting of the auxiliary roller pair 21 and / or for lifting the pressure roller from the driven roller of the pair of take-off rollers 13.
  • the intermediate linkage 64, 65, 66, 67, 68 enables the individual drives to be adapted to the working conditions in a particularly simple manner, in particular if the dimensions are as equal as possible the individual parts of this intermediate linkage are to be provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP87115943A 1982-01-26 1982-12-20 Verfahren und Vorrichtung zum Anspinnen einer Offenend-Spinnvorrichtung Expired - Lifetime EP0274016B2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3202428A DE3202428C2 (de) 1982-01-26 1982-01-26 Verfahren und Vorrichtung zum Anspinnen eines Fadens in einer Offenend-Spinnvorrichtung
DE3202428 1982-01-26

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP82111829.6 Division 1982-12-20
EP82111829A Division EP0084659B1 (de) 1982-01-26 1982-12-20 Verfahren und Vorrichtung zum Anspinnen eines Fadens in einer Offenend-Spinnvorrichtung

Publications (4)

Publication Number Publication Date
EP0274016A2 EP0274016A2 (de) 1988-07-13
EP0274016A3 EP0274016A3 (en) 1988-08-03
EP0274016B1 EP0274016B1 (de) 1990-07-04
EP0274016B2 true EP0274016B2 (de) 1993-08-25

Family

ID=6153944

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EP82111829A Expired EP0084659B1 (de) 1982-01-26 1982-12-20 Verfahren und Vorrichtung zum Anspinnen eines Fadens in einer Offenend-Spinnvorrichtung
EP87115943A Expired - Lifetime EP0274016B2 (de) 1982-01-26 1982-12-20 Verfahren und Vorrichtung zum Anspinnen einer Offenend-Spinnvorrichtung

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Application Number Title Priority Date Filing Date
EP82111829A Expired EP0084659B1 (de) 1982-01-26 1982-12-20 Verfahren und Vorrichtung zum Anspinnen eines Fadens in einer Offenend-Spinnvorrichtung

Country Status (11)

Country Link
US (1) US4644742A (el)
EP (2) EP0084659B1 (el)
JP (2) JPS58174638A (el)
CS (1) CS277393B6 (el)
CZ (1) CZ277680B6 (el)
DE (1) DE3202428C2 (el)
GB (2) GB2115020B (el)
HK (2) HK7587A (el)
IN (1) IN160080B (el)
MY (2) MY8700335A (el)
SG (1) SG87486G (el)

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DE10217243B4 (de) * 2002-04-15 2012-05-03 Rieter Ingolstadt Gmbh Verfahren zum Anspinnen eines Fadens an einer Offenend-Spinnvorrichtung

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DE3418780A1 (de) * 1984-05-19 1985-11-21 Schubert & Salzer Maschinenfabrik Ag, 8070 Ingolstadt Verfahren und vorrichtung zum vorbereiten eines abgelaengten fadenendes zum wiederanspinnen einer offenend-spinnvorrichtung
DE3536850A1 (de) * 1985-10-16 1987-04-23 Zinser Textilmaschinen Gmbh Verfahrbare wartungseinrichtung fuer eine spinnmaschine
GB2192906B (en) * 1986-06-30 1988-06-29 Rieter Ag Maschf Open-end yarn piecer
DE3635510C2 (de) * 1986-10-18 1995-10-26 Schlafhorst & Co W Verfahren und Einrichtung zur Außerbetriebnahme und darauffolgenden Wiederinbetriebnahme einer OE-Rotorspinnmaschine
GB2199342A (en) * 1987-02-18 1988-07-06 Hollingsworth Uk Ltd Servicing robot for spinning machine
DE3719676C1 (de) * 1987-06-12 1988-09-29 Schubert & Salzer Maschinen Steuervorrichtung zum Antreiben und Stillsetzen eines Offenend-Spinnelementes
DE3814966A1 (de) * 1988-05-03 1989-11-16 Schubert & Salzer Maschinen Verfahren und vorrichtung zum anspinnen einer offenend-spinnvorrichtung
US5170953A (en) * 1988-08-12 1992-12-15 Hans Stahlecker Servicing apparatus which can be moved along a spinning machine and has devices for seeking a yarn end from a spool package
DE3936748A1 (de) * 1989-05-05 1990-11-08 Schubert & Salzer Maschinen Verfahren und vorrichtung zum anspinnen eines fadens an einer mit einem spinnrotor arbeitenden offenend-spinnvorrichtung
DE3918946A1 (de) * 1989-06-09 1990-12-13 Schubert & Salzer Maschinen Vorrichtung und verfahren zum anspinnen eines fadens an einer offenend-spinnvorrichtung
DE3930136A1 (de) * 1989-09-09 1991-03-21 Schlafhorst & Co W Verfahren und einrichtung zur uebergabe eines fadens an eine spulstelle einer textilmaschine
IT1243473B (it) * 1990-08-01 1994-06-15 Savio Spa Dispositivo e procedimento per la captazione e la preparazione del bandolo per il riattacco in un filatoio open-end
US5414985A (en) * 1991-03-01 1995-05-16 Schubert & Salzer Maschinenfabrik Ag Process and apparatus for piecing a thread in open-end spinning
IT1258920B (it) * 1991-05-11 1996-03-01 Procedimento e dispositivo per l'allacciamento del filo di un dispositivo di filatura ad estremita' aperta
DE4131179C2 (de) * 1991-09-19 1996-12-05 Rieter Ingolstadt Spinnerei Verfahren und Vorrichtung zum Stillsetzen einer Aufwickelspule
DE59300625D1 (de) * 1992-08-07 1995-10-26 Rieter Ingolstadt Spinnerei Verfahren zum Betrieb einer Offenend-Spinnvorrichtung.
DE9317052U1 (de) * 1993-11-08 1994-01-13 Schlafhorst & Co W Antriebsrolle für den rotatorischen Friktionsantrieb einer Textilspule
DE4404538C1 (de) * 1994-02-12 1995-04-27 Rieter Ingolstadt Spinnerei Verfahren und Vorrichtung zum Anspinnen einer Offenend-Spinnvorrichtung
CZ281245B6 (cs) * 1995-03-14 1996-07-17 Maschinenfabrik Rieter Ag Způsob ustavování ústí vyhledávací hubice proti obvodu cívky a obslužné zařízení k provádění tohoto způsobu
DE19634300A1 (de) * 1996-08-24 1998-02-26 Rieter Ingolstadt Spinnerei Verfahren und Vorrichtung zum Anspinnen eines Fadens an einer Offenend-Spinnvorrichtung
DE10304729A1 (de) * 2003-02-06 2004-08-19 Rieter Ingolstadt Spinnereimaschinenbau Ag Verfahren und Vorrichtung zum Anspinnen eines Fadens in einer Offenend-Spinnvorrichtung
US8167783B2 (en) * 2006-04-11 2012-05-01 Pack-Tiger Gmbh Machine for the manufacture of paper padding
JP2019034814A (ja) * 2017-08-16 2019-03-07 村田機械株式会社 糸巻取ユニット

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AT260075B (de) 1965-09-06 1968-02-12 Vyzk Ustav Bavlnarsky Vorrichtung zum Abzug des Garnes aus der Spinnvorrichtung einer Spinnanlage
CH508745A (de) * 1969-02-25 1971-06-15 Toyoda Automatic Loom Works Verfahren zum automatischen Anspinnen eines Fadens nach einem Fadenbruch an einer Spinnstelle einer ringlosen Spinnmaschine und Spinnmaschine zu dessen Durchführung
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10217243B4 (de) * 2002-04-15 2012-05-03 Rieter Ingolstadt Gmbh Verfahren zum Anspinnen eines Fadens an einer Offenend-Spinnvorrichtung

Also Published As

Publication number Publication date
JPH0316405B2 (el) 1991-03-05
DE3202428C2 (de) 1986-06-05
GB2115020A (en) 1983-09-01
JPH0418048B2 (el) 1992-03-26
EP0084659A3 (en) 1985-12-04
GB2138849A (en) 1984-10-31
CS53588A3 (en) 1991-11-12
HK9487A (en) 1987-02-06
CZ277680B6 (en) 1993-03-17
JPH0376829A (ja) 1991-04-02
EP0274016A2 (de) 1988-07-13
GB8302075D0 (en) 1983-03-02
US4644742A (en) 1987-02-24
GB8410854D0 (en) 1984-06-06
IN160080B (el) 1987-06-27
MY8700268A (en) 1987-12-31
GB2138849B (en) 1986-06-18
JPS58174638A (ja) 1983-10-13
CS277393B6 (en) 1993-03-17
GB2115020B (en) 1986-06-11
MY8700335A (en) 1987-12-31
EP0084659B1 (de) 1989-02-22
EP0274016A3 (en) 1988-08-03
EP0274016B1 (de) 1990-07-04
CS51383A3 (en) 1992-09-16
EP0084659A2 (de) 1983-08-03
SG87486G (en) 1987-03-27
HK7587A (en) 1987-01-28
DE3202428A1 (de) 1983-08-11

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