US20230183889A1 - Method for separating a sliver delivered out of a sliver can at a spinning station of a spinning machine, and spinning machine - Google Patents

Method for separating a sliver delivered out of a sliver can at a spinning station of a spinning machine, and spinning machine Download PDF

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Publication number
US20230183889A1
US20230183889A1 US17/919,636 US202117919636A US2023183889A1 US 20230183889 A1 US20230183889 A1 US 20230183889A1 US 202117919636 A US202117919636 A US 202117919636A US 2023183889 A1 US2023183889 A1 US 2023183889A1
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United States
Prior art keywords
sliver
spinning
supply device
spinning machine
station
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US17/919,636
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English (en)
Inventor
Michael Ueding
Adalbert Stephan
Sebastian FRITZ
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Assigned to MASCHINENFABRIK RIETER AG reassignment MASCHINENFABRIK RIETER AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: UEDING, MICHAEL, FRITZ, SEBASTIAN, STEPHAN, ADALBERT
Publication of US20230183889A1 publication Critical patent/US20230183889A1/en
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
    • D01H13/16—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material
    • D01H13/18—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material stopping supply only
    • D01H13/188—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material stopping supply only by cutting or clamping yarns or rovings
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
    • D01H13/16—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material
    • D01H13/18—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material stopping supply only
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/04—Guides for slivers, rovings, or yarns; Smoothing dies
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/005—Arrangements for feeding or conveying the slivers to the drafting machine
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H9/00—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine
    • D01H9/005—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine for removing empty packages or cans and replacing by completed (full) packages or cans at paying-out stations; also combined with piecing of the roving
    • D01H9/008—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine for removing empty packages or cans and replacing by completed (full) packages or cans at paying-out stations; also combined with piecing of the roving for cans

Definitions

  • the present invention relates to a method for separating a sliver delivered out of a sliver can at a spinning station of a spinning machine, wherein the spinning station includes a spinning device and a supply device, by means of which the sliver is delivered out of the sliver can at the spinning station and in which the sliver is clamped at the spinning station.
  • the invention relates to a spinning machine that includes a plurality of adjacently arranged spinning stations and sliver cans placed in at least one row underneath the spinning stations, wherein the spinning stations each include a supply device for delivering a sliver out of one of the sliver cans at the spinning station.
  • DE 25 21 851 A1 therefore describes separating the sliver in a controlled manner with a smooth cut by means of a separating device.
  • an appropriate separating device is to be arranged at each spinning station. The remaining sliver residue is spun, wherein, due to the smoothly cut sliver end, the yarn forms a thick place at the end of the yarn in the form of a fiber bundle.
  • DE 39 28 648 A1 describes a can change process in which sliver cans are exchanged by means of a can change trolley.
  • the can change trolley is designed to be able to exchange sliver cans from the front row and sliver cans from the back row.
  • the can change trolley includes a separating device in order to achieve a defined separation of the sliver at sliver cans that are not yet completely empty. Yarn defects can arise in this case as well.
  • a problem addressed by the present invention is therefore that of eliminating the disadvantages known from the prior art, in particular of avoiding yarn defects due to the separation of the sliver. Additional objects and advantages of the invention will be set forth in part in the following description, or may be obvious from the description, or may be learned through practice of the invention.
  • the spinning station includes a spinning device and a supply device, by means of which the sliver is delivered out of the sliver can at the spinning station in a delivery direction and in which the sliver is clamped at the spinning station. It is provided that, in order to separate the sliver, the supply device is driven counter to the delivery direction, wherein the sliver is returned by means of the supply device and, as a result, the clamping in the supply device is released.
  • the spinning stations each include a supply device for delivering a sliver out of one of the sliver cans at the spinning station. It is provided that the spinning station and/or the spinning machine include(s) a control unit for carrying out the above-described method.
  • the supply device in order to separate the sliver, the supply device is operated counter to the delivery direction during production. As a result, before the sliver enters the spinning device, the sliver is separated from the spinning device and no sliver residue remains at the spinning station. It is therefore neither necessary to remove a remaining sliver residue from the spinning station, nor can a remaining sliver residue result in yarn defects. Since, in addition, due to the return, the clamping of the sliver in the supply device is simultaneously also released, the sliver, which has now been separated, can be returned in entirety to the sliver can during a sliver can change.
  • the supply device is a feeder that is briefly operated counter to its regular direction of rotation during production in order to carry out a return.
  • the sliver that is clamped during operation between a feed roller of the feeder and a feed trough assigned to the feed roller is separated from the spinning device immediately before the sliver enters the spinning device and is simultaneously conveyed out of the clamping point.
  • the clamping of the sliver in the supply device is therefore simultaneously released, and so the end of the separated sliver is free.
  • the method can also be used on an air-jet spinning machine.
  • the supply device is a drafting system in this case, which is briefly driven backward in order to separate the sliver, as the result of which the sliver entering the spinning device is returned.
  • the sliver is clamped in the roller pairs of the drafting system in this case. Due to the return of the sliver and driving the drafting system in the direction counter to the regular delivery direction, the sliver is separated immediately before the sliver enters the spinning device in this case as well and is conveyed out of the drafting system by means of the roller pairs of the drafting system. As a result, the clamping of the sliver in the supply device is simultaneously released, and so the end of the separated sliver is free.
  • a draft between the various roller pairs of the drafting system is established in reverse order in comparison to the draft during regular production.
  • it can be ensured that the sliver does not become jammed during the return, which can occur, for example, at a condenser assigned to the drafting system.
  • the spinning device is initially stopped before the supply device is driven counter to the delivery direction.
  • the units of the spinning station can be shut down in a controlled manner and in coordination with one another. Yarn defects, which could otherwise arise during the delivery of the sliver, can be avoided as a result. This is not necessary, however. A thread break can also be generated due to the driving counter to the delivery direction.
  • the sliver after having been separated, is unthreaded from a sliver guide of the spinning station.
  • the sliver is no longer connected to the spinning machine at any point and, as a result, can be easily removed from the spinning machine together with the sliver can to be exchanged during a can change.
  • An at least partially emptied sliver can to be removed is removed from the spinning machine and replaced by a full sliver can.
  • the sliver can be separated in a reliable manner and free of residue, i.e., without any sliver residue remaining.
  • the sliver cans can be easily exchanged as a result, even though the sliver cans still contain some residual product. Due to a preventive sliver can change of this type, downtimes of the spinning devices, which can occur when the sliver cans are emptied, can be avoided. The productivity of the spinning machine can be increased as a result.
  • a remaining sliver length of the sliver is predefined and the can change process is initiated as soon as the predefined remaining sliver length has been attained.
  • the specification of a defined remaining sliver length contributes to avoiding the situation in which the sliver cans are completely emptied and to avoiding premature sliver can changes.
  • a remaining sliver length of the sliver at which an automatic can change process is to be initiated is advantageously pre-defined in the control unit.
  • the spinning station includes a measuring device, by means of which the remaining sliver length of the sliver is ascertainable.
  • the measuring device is in control connection with the control unit, in order to initiate the automatic can change process.
  • the sliver is unthreaded by means of at least one handling device of the spinning machine.
  • the sliver can be advantageously separated from the spinning machine already before an operator or a can changer arrives.
  • the spinning machine and/or the spinning station advantageously include(s), for this purpose, at least one handling device for unthreading the sliver from a sliver guide of the spinning station.
  • the handling device can be arranged, for example, at the spinning machine, in particular at a single spinning station, and, as a result, can advantageously unthread the sliver directly after the sliver has been returned.
  • a handling device that serves multiple spinning stations and is arranged in the area of a spinning station is also conceivable.
  • the spinning machine includes a movable service unit, at which the at least one handling device is mounted.
  • the handling device of the movable service unit can preferably also unthread the sliver from the sliver guide before a movable can changer arrives.
  • a can changer which is also provided, includes, for this purpose, a handling device, for example, a clamp for the sliver, for unthreading a separated sliver from the sliver guide.
  • a handling device for example, a clamp for the sliver, for unthreading a separated sliver from the sliver guide.
  • the at least one handling device of the spinning machine cooperates with the at least one handling device of the can changer in order to carry out the unthreading.
  • a handling device arranged in a movable service unit and for a spinning station-specific handling device Two handling devices arranged at the spinning machine could also cooperate.
  • a handling device in the movable service unit could perform the unthreading process jointly with the handling device at the spinning station.
  • the sliver is unthreaded during the can change process. This is advantageous, in particular, when the unthreading is carried out by a handling device of the can changer, since this requires no additional time and the downtimes of the spinning stations can be kept low. It can be advantageous to unthread the sliver only during the can change process also when unthreading the sliver by means of a handling device of the spinning machine. The can change process can also be carried out without delay in this case.
  • the handling device is provided at the can changer, it is particularly advantageous when the sliver is clamped by a can gripper of the can changer to unthread the sliver from the sliver guide.
  • the sliver can be advantageously unthreaded from the sliver guide by removing the sliver can from the spinning station.
  • a clamp is arranged at a can gripper of the can changer or the can gripper itself forms a clamp.
  • FIG. 1 shows a schematic front view of a spinning machine
  • FIG. 2 shows a schematic front view of a spinning station of a spinning machine before the separation of the sliver
  • FIG. 3 shows the spinning station from FIG. 2 after the separation of the sliver
  • FIG. 4 shows a schematic front view of a spinning station that includes a handling device for unthreading the sliver after the separation of the sliver;
  • FIG. 5 shows the spinning station from FIG. 4 after the unthreading of the sliver
  • FIG. 6 shows a section of a spinning machine with a movable service unit that includes a handling device for unthreading the sliver
  • FIG. 7 shows a schematic side view of a spinning station that includes a can changer according to a first embodiment before an automatic can change process is carried out;
  • FIG. 8 shows the spinning station from FIG. 7 during the automatic can change process
  • FIG. 9 shows a schematic side view of a spinning station that includes a can changer according to a second embodiment before an automatic can change process is carried out;
  • FIG. 10 shows the spinning station from FIG. 9 during the automatic can change process
  • FIG. 11 shows a schematic side view of a spinning station that includes a can changer according to a third embodiment before an automatic can change process is carried out
  • FIG. 12 shows the spinning station from FIG. 11 during the automatic can change process.
  • FIG. 1 shows a schematic front view of a spinning machine 1 that includes a plurality of adjacently arranged spinning stations 2 .
  • the spinning stations 2 are arranged, in the usual way, between two frames 11 on one or also on both longitudinal side(s) of the spinning machine 1 .
  • Each of the spinning stations 2 includes, in the usual way, a supply device 5 , by means of which a sliver 4 is delivered out of a sliver can 3 to a spinning device 6 .
  • the sliver cans 3 are placed underneath the spinning stations 2 in one row or also in multiple rows.
  • a yarn 8 is spun out of the sliver 4 , the yarn 8 also being wound, as known, onto a bobbin 7 by means of a winding device.
  • the sliver 4 after exiting the sliver can 3 and before reaching the supply device 5 , is guided through a sliver guide 9 at the spinning station 2 , the sliver guide 9 being arranged underneath the supply device 5 in the present example.
  • a measuring device 17 is also arranged at each spinning station 2 , by means of which a remaining length of the sliver 4 still located in the particular sliver can 3 can be ascertained. This can be carried out, for example, indirectly, by measuring the running length of the sliver 4 that has already been processed.
  • the spinning machine 1 also includes a movable service unit 12 , which can carry out maintenance operations, such as, for example, bobbin changes, cleaning processes, or, depending on the design of the spinning machine 1 , spinning start-up processes as well.
  • the spinning stations 2 of the spinning machine 1 can preferably also be designed as at least semi-autonomous spinning stations 2 , however, which can then automatically carry out at least one spinning start-up process.
  • the spinning stations 2 can also be designed to be fully autonomous, and so a movable service unit 12 is not absolutely necessary.
  • the spinning machine also includes at least one control unit 16 for controlling the spinning stations 2 and, possibly, the movable service unit 12 .
  • a control unit 16 is apparent as a central machine control system of the spinning machine 1 .
  • Control units 16 can additionally also be provided at the spinning stations 2 , however, in order to control the working elements of the spinning stations, for example, the measuring device 17 , the supply device 5 , the spinning device 6 , and others.
  • Each spinning station 2 can include a separate control unit 16 as a workstation control system or one control unit 16 can be provided as a workstation control system for a group of spinning stations 2 .
  • the spinning machine 1 can be designed as a rotor spinning machine, and so a feeder is provided as a supply device 5 .
  • the spinning machine 1 could also be designed as an air-jet spinning machine, however, wherein the supply device 5 would then be designed as a drafting system.
  • FIG. 2 shows a method for separating a sliver 4 delivered out of a sliver can 3 at a spinning station 2 , using the example of a workstation 2 at a rotor spinning machine.
  • the sliver 4 is guided through the sliver guide 9 before the sliver 4 reaches the supply device 5 and is fed by the supply device 5 to the opening device 19 .
  • the supply device 5 is designed as a feeder in the present case and includes a feed roller 21 and a feed trough 20 , between which the sliver 4 is clamped.
  • the feed roller 21 is driven in the regular direction of rotation of the feed roller 21 during the production operation, as the result of which the sliver 4 is fed to the opening roller 19 in the delivery direction LR.
  • the sliver 4 is opened into individual fibers by the opening roller 19 , the individual fibers then being fed to the spinning device 6 .
  • the spinning station 2 is initially stopped. This can be carried out, for example, by stopping the feed roller 21 , resulting in a thread break. It is also possible, however, to shut down the working elements of the spinning station 2 in a controlled manner.
  • the control unit 16 of the spinning machine 1 and/or of the spinning station 2 is in control connection, among other things, with the spinning device 6 and with the supply device 5 , as indicated by the dashed lines.
  • the spinning station 2 is now stopped, but the sliver end 10 (see FIG. 3 ) of the sliver 4 is still clamped in the supply device 5 , however.
  • the supply device 5 namely the feed roller 21 in this case, is now briefly driven counter to the regular direction of rotation of the supply device 5 , as indicated by the arrow.
  • the sliver 4 is returned counter to the delivery direction LR until the sliver end 10 has been conveyed out of the supply device 5 and the clamping in the supply device 5 has been released.
  • the sliver end 10 is now free and can be removed from the sliver guide 9 , for example, within the scope of a can change process.
  • the separation of the sliver 4 can take place due to the attainment of a remaining length predefined in the control unit 16 , the remaining length being detected by a measuring device 17 (not represented here), which, for this purpose, is also connected to the control unit 16 .
  • This can also take place, however, due to a signal predefined by a control unit 16 , for example, within the scope of a lot change, or can also be triggered manually by an operator.
  • a signal predefined by a control unit 16 for example, within the scope of a lot change, or can also be triggered manually by an operator.
  • the sliver 4 is separated by means of a return, no sliver residue is spun, and so defective places in the yarn 8 are avoided. Thereafter, if the sliver 4 is to be unthreaded from the sliver guide 9 , for example, within the scope of an automatic can change process or also for cleaning purposes, multiple possibilities are conceivable according to the method.
  • the sliver 4 is removed from the sliver guide 9 by means of a spinning station-specific handling device 13 .
  • the handling device 13 is designed as a swivelable clamp 18 in this case.
  • the clamp 18 can be actuated by the control unit 16 and the sliver 4 can be clamped. Thereafter, the sliver end 10 is unthreaded from the sliver guide 9 by swiveling (see arrow in FIG. 4 ) the handling device 13 .
  • the clamp 18 can be released so that the sliver 4 automatically drops into the sliver can 3 due to gravity.
  • the handling device 13 can also be designed, however, such that the handling device 13 places the sliver 4 with the sliver end 10 directly in the sliver can 3 .
  • the handling device 13 is arranged in a movable service unit 12 . This is represented in FIG. 6 .
  • the handling device 13 is designed as a swivelable clamp 18 in the present case as well.
  • the handling device 13 is preferably connected to a control unit 16 (not shown here) of the service unit 12 , which communicates with the control unit 16 of the spinning machine 1 and/or with the control unit 16 of the workstation 2 .
  • the unthreading can take place as described with reference to FIGS. 4 and 5 .
  • the clamp 18 described in FIGS. 4 through 6 can be designed, of course, not only to be swivelable, but rather also movable in another way, in order to unthread the sliver 4 from the sliver guide 9 .
  • the handling device 13 also does not absolutely need to include a clamp 18 .
  • a finger that is swivelable, or movable in any other way, into the path of the sliver 4 and deflects and, as a result, unthreads the sliver 4 is also conceivable.
  • the unthreading of the sliver 4 can be carried out before, during, or after an automatic can change process, provided that a can changer 14 (see FIGS. 7 through 12 ) is still positioned at the spinning station 2 .
  • FIGS. 7 and 8 show another embodiment of the method and of a movable can changer 14 , in which the handling device 13 is arranged at the can changer 14 .
  • the can change process can be initiated, for example, as soon as the attainment of a predefined remaining sliver length has been registered by the measuring device 17 .
  • the desired remaining sliver length can be stored, for example, in the control unit 16 of the spinning machine 1 and/or of the spinning station 2 .
  • a preventive can change of the sliver cans 3 of the other rows can also be carried out if a sliver can 3 has emptied in only one of the rows at the same standing area.
  • a preventive can change after a certain operating time is also possible.
  • the can changer 14 is summoned for the automatic can change process, the can changer 14 carrying a full sliver can 3 b .
  • the can changer 14 also includes a can gripper 15 to handle the sliver cans 3 and exchange the sliver can 3 a to be removed and replaced by the full sliver can 3 b .
  • the can changer 14 has become positioned in front of the relevant spinning station 2 .
  • the sliver 4 has already been separated at the relevant spinning station 2 due to the return carried out by means of the supply device 5 and is now connected to the spinning station 2 only at the sliver guide 9 .
  • the handling device 13 is arranged at the can changer 14 directly at the can gripper 15 in the present case.
  • the can gripper 15 includes a clamp 18 , which clamps the sliver 4 underneath the sliver guide 9 .
  • the sliver can 3 a to be removed is now removed by means of the can gripper 15
  • the sliver 4 is simultaneously unthreaded by means of the clamp 18 fastened at the can gripper 15 due to the movement of the can gripper 15 .
  • FIGS. 9 and 10 show another embodiment of the method and of a movable can changer 14 , in which the handling device 13 is arranged at the can changer 14 .
  • a clamp 18 as a handling device 13 , is arranged directly at the can gripper 15 .
  • FIG. 9 A situation is represented in FIG. 9 , in which the sliver 4 has already been separated due to the return carried out by means of the supply device 5 and the can gripper 15 of the can changer 14 has just gripped the sliver can 3 a to be removed.
  • the sliver can 3 a to be removed is now pulled out, to some extent, from its standing area underneath the spinning machine 1 , as indicated by the arrow.
  • the sliver 4 can be clamped by means of the clamp 18 .
  • the sliver 4 is clamped directly at the front edge of the sliver can 3 a to be removed. Due to the sliver can 3 a being pulled out farther, the sliver 4 is also simultaneously unthreaded from the sliver guide 9 .
  • the sliver 4 more precisely, the sliver end 10 , then remains outside of the sliver can 3 a .
  • FIGS. 11 and 12 show another embodiment of the method and of a movable can changer 14 , in which the handling device 13 is arranged at the can changer 14 .
  • the handling device 13 includes a swivelable finger, which deflects the sliver 4 and, as a result, unthreads the sliver 4 from the sliver guide 9 .
  • FIG. 11 shows a situation in which the sliver can 3 a to be removed has just been gripped by means of the can gripper 15 .
  • FIG. 12 shows a situation, however, in which the sliver 4 has already been unthreaded from the sliver guide 9 by way of the finger of the handling device 13 having been swiveled.
  • a handling device 13 arranged at the can changer 14 could also include a swivelable clamp 18 similarly to FIGS. 4 through 6 .
  • the handling device 13 is provided at the can changer 14 , it is also advantageous when the unthreading of the sliver 4 is carried out before or during the automatic can change process. It is also conceivable, however, to carry out the unthreading of the sliver 4 only after the actual can change process, as soon as the sliver can 3 a has been accommodated on the can changer 14 . Further modifications within the scope of the claims are also possible, as is any combination of the features, even if they are represented and described in different exemplary embodiments.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US17/919,636 2020-04-22 2021-04-13 Method for separating a sliver delivered out of a sliver can at a spinning station of a spinning machine, and spinning machine Pending US20230183889A1 (en)

Applications Claiming Priority (3)

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DE102020110991.1 2020-04-22
DE102020110991.1A DE102020110991A1 (de) 2020-04-22 2020-04-22 Verfahren zum Trennen eines aus einer Spinnkanne an eine Spinnstelle einer Spinnmaschine gelieferten Faserbandes sowie Spinnmaschine
PCT/EP2021/059585 WO2021213850A1 (de) 2020-04-22 2021-04-13 Verfahren zum trennen eines aus einer spinnkanne an eine spinnstelle einer spinnmaschine gelieferten faserbandes sowie spinnmaschine

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US (1) US20230183889A1 (de)
EP (1) EP4100564A1 (de)
CN (1) CN115380137B (de)
DE (1) DE102020110991A1 (de)
WO (1) WO2021213850A1 (de)

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DE102020131090A1 (de) * 2020-11-24 2022-05-25 Maschinenfabrik Rieter Ag Verfahren zur Durchführung eines automatischen Kannenwechselvorgangs an einer Spinnstelle einer Spinnmaschine sowie Spinnmaschine und verfahrbarer Kannenwechsler

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CH709749A1 (de) * 2014-06-12 2015-12-15 Rieter Ag Maschf Luftspinnmaschine sowie Verfahren zum Betrieb einer solchen.
DE102018121906A1 (de) 2018-09-07 2020-03-12 Maschinenfabrik Rieter Ag Verfahren zum Zuführen eines Bandendes sowie Spinnmaschine

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WO2021213850A1 (de) 2021-10-28
DE102020110991A1 (de) 2021-10-28

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