Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H54/00—Winding, coiling, or depositing filamentary material
  • B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
  • B65H54/28—Traversing devices; Package-shaping arrangements
  • B65H54/34—Traversing devices; Package-shaping arrangements for laying subsidiary winding, e.g. transfer tails
  • B65H54/343—Traversing devices; Package-shaping arrangements for laying subsidiary winding, e.g. transfer tails when starting winding on an empty bobbin
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H54/00—Winding, coiling, or depositing filamentary material
  • B65H54/70—Other constructional features of yarn-winding machines
  • B65H54/71—Arrangements for severing filamentary materials
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
  • B65H67/04—Arrangements for removing completed take-up packages and or replacing by cores, formers, or empty receptacles at winding or depositing stations; Transferring material between adjacent full and empty take-up elements
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
  • B65H67/04—Arrangements for removing completed take-up packages and or replacing by cores, formers, or empty receptacles at winding or depositing stations; Transferring material between adjacent full and empty take-up elements
  • B65H67/0405—Arrangements for removing completed take-up packages or for loading an empty core
  • B65H67/0417—Arrangements for removing completed take-up packages or for loading an empty core for loading an empty core
  • B65H67/0422—Arrangements for removing completed take-up packages or for loading an empty core for loading an empty core for loading a starter winding, i.e. a spool core with a small length of yarn wound on it; preparing the starter winding
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01H—SPINNING OR TWISTING
  • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
  • D01H1/14—Details
  • D01H1/38—Arrangements for winding reserve lengths of yarn on take-up packages or spindles, e.g. transfer tails
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01H—SPINNING OR TWISTING
  • D01H9/00—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine
  • D01H9/02—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine for removing completed take-up packages and replacing by bobbins, cores, or receptacles at take-up stations; Transferring material between adjacent full and empty take-up elements
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01H—SPINNING OR TWISTING
  • D01H9/00—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine
  • D01H9/02—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine for removing completed take-up packages and replacing by bobbins, cores, or receptacles at take-up stations; Transferring material between adjacent full and empty take-up elements
  • D01H9/04—Doffing arrangements integral with spinning or twisting machines
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2701/00—Handled material; Storage means
  • B65H2701/30—Handled filamentary material
  • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

• the invention relates to a method of handling yarn during replacement of a bobbin with an empty tube at a spinning station of a yarn manufacturing textile machine, in which the spun yarn stops being wound on a bobbin and starts being sucked into a suction tube, whereupon after replacing the wound bobbin with an empty tube the spun yarn is brought from the suction tube to a winding device, where the spun yarn is caught by a tooth of a disc of the winding device, by which means the yarn is interrupted, the yarn free end is sucked into the suction tube and the spun yarn starts to be wound onto a yarn reserve on the tube.
• the invention also relates to a device for handling yarn during replacement of a bobbin with an empty tube at a spinning station of a yarn manufacturing textile machine, which comprises a suction tube connected to a vacuum channel of the machine.
• the invention relates to a textile machine with a device for handling yarn during replacement of a bobbin with an empty tube at a spinning station.
• Spinning on high-performance spinning machines is characterized by an effort to shorten or eliminate all unproductive times that generally reduce machine performance.
• one of the possibilities of shortening the unproductive times of the machine is to shorten the time necessary to replace the wound bobbin with an empty tube.
• Taking over the yarn being produced from the winding device to the suction device is possible either by using a service robot which is movable along a row of workstations and which is provided with i necessary working nodes and devices, including a handling device with a bobbin and a tube and a suction device, or it can be performed by a human operator using the so-called doffing tube which can be connected by the operator to a vacuum channel of the machine at a respective spinning station.
• a service robot which is movable along a row of workstations and which is provided with i necessary working nodes and devices, including a handling device with a bobbin and a tube and a suction device, or it can be performed by a human operator using the so-called doffing tube which can be connected by the operator to a vacuum channel of the machine at a respective spinning station.
• the doffing tube After replacing the bobbin with an empty tube, the doffing tube is placed in a parking position at the respective spinning station and in this position the spun yarn is guided through a rectifier outside a yarn traversing device, but through the path of a tooth of a disc of the winding device, by which the yarn is caught and interrupted, the free yarn end is sucked into the doffing tube and the next spun yarn begins to be wound on the tube as a yarn reserve.
• a signal is sent to the control unit about the start of winding the yarn reserve.
• the device used for performing this method comprises a hand-held vacuum doffing tube connectable to the vacuum channel of the machine at the workstation of the machine and further comprises a parking place for the vacuum doffing tube at the spinning station near the winding device.
• the parking place is provided with a sensor of the vacuum doffing tube presence and a controllable yarn rectifier is arranged upstream of the winding device to guide the yarn temporarily outside the traversing device during the winding of the yarn reserve on the empty tube. Both the sensor and the rectifier are connected to the control unit of the workstation of the machine.
• the object of the invention is to eliminate or at least reduce the disadvantages of the background art.
• the object of the invention is achieved by a method of handling yarn during replacement of a bobbin with an empty tube at a spinning station of a yarn manufacturing textile machine, whose principle consists in that after replacing the bobbin with an empty tube, the yarn continuously produced and sucked into the suction tube is deflected laterally from the front internal portion of the suction tube length to an outer position of the suction tube, in which the yarn intersects the path of teeth on a disc, the peak of this deflection of the yarn being situated opposite the extreme portion of the empty tube, whereupon the yarn in the section between the peak of the yarn deflection and the vacuum channel of the machine is caught by the toothed disc and a yarn reserve is formed on the tube at a point opposite the peak of the yarn deflection before winding the yarn onto the bobbin is started.
• the yarn is interrupted by a toothed disc during the formation of the yarn reserve on the tube and the yarn end thus separated is sucked into the vacuum channel of the machine.
• connection of the suction tube to the vacuum channel of the machine is interrupted after the separated end of the yarn has been sucked into the vacuum channel of the machine.
• the lateral deflection of the yarn from the front portion of the suction tube length is performed by the temporarily opened portion of the suction tube on the side facing the winding device.
• the principle of the device for handling yarn during replacement of a bobbin with an empty tube at a spinning station of a yarn manufacturing textile machine consists in that to the suction tube is assigned a lateral deflector of yarn adapted to deflect the yarn from the inner space of the suction tube to the space next to the suction tube.
• the lateral yarn deflector comprises a yarn handling arm whose working end is reciprocally movable between the inner space of the suction tube, where it is adapted to pick up the yarn sucked into the vacuum channel of the machine, and the outer space next to the suction tube to a position corresponding to the peak of the yarn deflection.
• the suction tube is from its suction mouth along its initial length provided with a longitudinal openable wall on the side of the suction tube facing the winding device.
• a yarn interrupter is assigned to the suction tube.
• the suction tube is provided with a sensor of the yarn presence in the cavity of the suction tube.
• the principle of the textile machine with the device for handling yarn during replacement of the bobbin with an empty tube at the spinning station consists in that the device for handling yarn according to any of claims 6 to 10 is mounted at each spinning station, the device is associated with a winding device and is controllably connectable to the vacuum channel of the machine.
• Fig. 1 shows a side view of an arrangement of a winding device
• Fig. 2 shows a front view of the arrangement of the winding device
• Fig. 3 shows a diagram of overall yarn handling operation during replacement of the bobbin with an empty tube at a spinning station of a yarn manufacturing textile machine according to the invention
• Fig. 4 represents an exemplary embodiment of a yarn handling device during replacement of the bobbin with an empty tube at the spinning station of the yarn manufacturing textile machine in a state before the winding is completed and before suction of the produced yarn begins after the winding of yarn on the bobbin is interrupted according to the invention
• Fig. 1 shows a side view of an arrangement of a winding device
• Fig. 2 shows a front view of the arrangement of the winding device
• Fig. 3 shows a diagram of overall yarn handling operation during replacement of the bobbin with an empty tube at a spinning station of a yarn manufacturing textile machine according to the invention
• Fig. 4 represents an exemplary embodiment of a yarn handling device during replacement of
• FIG. 5 shows an exemplary embodiment of the yarn handling device during replacement of the bobbin with an empty tube at the spinning station of the yarn manufacturing textile machine in a state after the winding is completed, after interrupting the yarn from the bobbin and after the suction of the produced yarn is started according to the invention
• Fig. 6 shows an exemplary embodiment and of the yarn handling device during replacement of the bobbin with an empty tube at the spinning station of the yarn manufacturing textile machine in a state after exchanging the bobbin for an empty tube and at the moment of passing the yarn to the bobbin according to the present invention.
• the invention will be described with reference to an exemplary embodiment at a spinning station of a yarn manufacturing spinning machine, e.g. a rotor spinning machine or an air-jet spinning machine.
• a yarn manufacturing spinning machine e.g. a rotor spinning machine or an air-jet spinning machine.
• the invention can also be adequately employed in other types of textile machines which use replacement of the wound bobbin with an empty tube.
• a spinning machine comprises at least one row of identical spinning stations arranged next to each other.
• Each spinning station comprises a yarn forming spinning unit above which is arranged a draw-off mechanism of yarn above which is arranged a device 1 for traversing yarn across the width of a yarn package 2 on a tube 20.
• the tube is mounted rotatably in arms 22, 23 of a winding device by means of rotary discs 220, 230 arranged on the arms 22, 23.
• One of the rotary discs 220, 230 is provided with known circumferential teeth 2300 for catching and/or interrupting yarn.
• the bobbin i.e. a tube 20 with a yarn package 21 , or an empty tube 20 after replacing the wound bobbin, lies on a drive roller 24 during the spinning of yarn 0.
• the drive roller 24 has either an individual drive or it is mounted on a drive shaft running continuously along the entire length of the respective side of the machine.
• a suction mouth 30 of a suction device 3 of yarn is arranged facing the winding device 2, or the side edge of the bobbin near the drive roller 24.
• the suction device 3 comprises a suction tube 31, which is controllably connected to a vacuum channel 4 of the machine and which is from its suction mouth 30 along its initial length provided with a longitudinal openable wall 310, which closes and opens a part X of the length of the wall of the suction tube 31 on the side of the suction tube 31 facing the winding device 2.
• the suction tube 31 is from its suction mouth 30, along its initial length, provided with a longitudinal cut-out, optionally with another means.
• the suction device 3 further comprises a lateral deflector of yarn 0, which is adapted to deflect yarn 0 from the inner space of the suction tube 31 to the space next to the suction tube 31.
• the lateral deflector of yarn 0 comprises a handling arm 32 of yarn 0, whose working end 320 is reciprocally movable between the inner space of the suction tube 31, where it is adapted to pick up the yarn 0 sucked into the vacuum channel 4 of the machine, and the outer space next to the suction tube 31 to a position corresponding to the peak Ci of the yarn 0 deflection, where the working end 320 is situated such that the yarn 0 caught on it intersects the path of the rotary disc 230 with the teeth 2300.
• Assigned to the rotary disc 230 with the teeth 2300 is also an interrupter 25 of yarn 0 which serves to interrupt the yarn 0 reliably if the yarn 0 was not interrupted by the mere action of the teeth 2300 on the rotary disc 230.
• the suction device 3 further comprises a cutting device 33 of yarn 0, which is assigned to the extreme position of yarn 0 in the traversing guide 10 near the suction mouth 30 of the suction tube 31.
• the suction tube 31 is provided with a sensor of the presence of yarn 0 in the cavity of the suction tube 31. ideally in the portion downstream of the openable wall 310 of the suction tube 31-
• the individual components and nodes are connected to energy sources, or to appropriate drives, as well as to a control device (not shown).
• the yarn 0 is traversed along the width of the bobbin by the traversing guide 10 of yarn 0 in the path A and is continuously wound onto the bobbin.
• the required bobbin size i.e. after obtaining the required size of the yarn package 21 on the tube 20, or after the arrival of a doffer to the spinning station, or after pressing the operator button
• the replacement of the wound bobbin with an empty tube 20 is started.
• the mouth 30 of the suction tube 31 starts to suck air into the vacuum channel 4 of the machine and the yarn 0 is interrupted by the cutting device 33 of yarn 0.
• the yarn 0 end leading to the bobbin is wound onto the bobbin which is now already prepared to be replaced with an empty tube 20.
• the yarn 0 end leading to the spinning unit, which is continuously producing the yarn ⁇ is sucked in path B into the suction device
• Replacement of the bobbin with an empty tube 20 is performed by any of the known methods in which the bobbin is removed from the arms 22, 23 of the winding device 2 and an empty tube 20 is inserted between rotary discs 220 230 of the arms 22, 23. Specifically, this is done either automatically or semi- automatically or manually by the machine operator. In this case, it is ideal to replace the bobbin with an empty tube 20 automatically by tilting the arms 22,
• the arms open by means of an electric or pneumatic drive, wherein the bobbin falls out of the arms 22, 23 under its own weight onto a slide from which it then rolls further onto a conveyor belt, whereby during the backward movement of the arms 22, 23 to the front position, the empty tube 20 is inserted into the arms 22, 23.
• Another possibility of exchanging the bobbin for an empty tube 20 is to roll the bobbin onto the conveyor belt after opening the arms 22, 23 by means of a movable arm (not shown) of a doffer (not shown), by which the empty tube 20 is thereafter inserted between the arms.
• the bobbin can be also replaced with an empty tube 20 by the machine operator, who rolls out the bobbin 22, 23 onto the conveyor belt after the arms are opened and then inserts the empty tube 20 into the arms 22, 23, etc.
• the empty tube 20 in the arms 22, 23 is lowered onto the drive roller 24 of the winding device 2 and starts rotating.
• the yarn 0 which is continuously produced and sucked into the suction tube 31 is deflected laterally in the direction of the arrow 34 in Fig. 3 from the front portion of the suction tube length 31 to a position in which the yarn 0 intersects the path of the teeth 2300 on the disc 230.
• the yarn is deflected by deflecting the working end 320 of the handling arm 32, while opening simultaneously the front portion of the suction tube length 31 by tilting off the openable wall 310, or the handling arm 32 passes through the longitudinal cut-out in the suction tube 31 ⁇ etc.
• the yarn is now deflected to a curved path with arms C and C , whereby the peak Ci of the yarn 0 deflection, or, in other words, the deflection of the working end 320 of the handling yarn 32, is situated opposite the extreme portion of the empty tube 20.
• the deflected yarn 0 is caught by the toothed disc 230 in the arm C2 between the peak Ci of the yarn 0 deflection and the vacuum channel 4 of the machine, which results in the interruption of the yarn 0 between the toothed disc 230 and the vacuum channel 4 of the machine, and this separated yarn end is sucked into the vacuum channel 4 of the machine.
• the yarn 0 continuously produced now forms a yarn 0 reserve on the tube 20 and after its formation, the working end 320 of the handling yarn 32 returns to its initial position in the suction tube 31.
• the openable wall 310 of the suction tube 31 closes the front portion X of the suction tube length 31 and interrupts the connection of the suction tube 31 to the vacuum channel 4 of the machine due to energy savings and reduction of pressure loss.
• the handling arm 32 is mounted outside the suction tube 31 and only the working end 320 of the handling yarn 32, which deflects the yarn from the path B to the curved path with the arms C and C2 extends into the suction tube 31.
• the suction tube 31 has a circular cross-section.
• the suction tube 31 has another suitable shape of the cross-section, such as prismatic or square or oval, etc. Now the replacement of the bobbin with an empty tube 20 is finished by means of the suction device 3 arranged at each spinning station of the machine without interrupting the yarn production at the spinning station.

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

Applications Claiming Priority (2)

Publications (1)

Family

ID=72086815

Family Applications (1)

Country Status (2)

Citations (4)

• 2019
  • 2019-06-19 CZ CZ2019-391A patent/CZ2019391A3/cs unknown
• 2020
  • 2020-06-19 WO PCT/EP2020/067135 patent/WO2020254598A1/en active Application Filing

Patent Citations (4)

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