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
  • B65H57/00—Guides for filamentary materials; Supports therefor
  • B65H57/06—Annular guiding surfaces; Eyes, e.g. pigtails
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
  • B65H59/005—Means compensating the yarn tension in relation with its moving due to traversing arrangements
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H57/00—Guides for filamentary materials; Supports therefor
  • B65H57/14—Pulleys, rollers, or rotary bars
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
  • B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
  • B65H63/02—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
  • B65H63/04—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to excessive tension or irregular operation of apparatus
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H71/00—Moistening, sizing, oiling, waxing, colouring or drying filamentary material as additional measures during package formation
  • B65H71/005—Oiling, waxing by applying solid wax cake during spooling
• • 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
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01H—SPINNING OR TWISTING
  • D01H2700/00—Spinning or twisting machines; Drafting devices
  • D01H2700/22—Winding devices for spinning mules

Definitions

• a controlled yarn storage unit upstream of the changing devices along a yarn path for winding bobbins, e.g., conical cross bobbins.
• These yarn storage units serve to adapt the yarn sag occurring during winding the bobbins to the constant yarn delivery speed, e.g., of a spinning device or spinneret take-up device.
• the take-up bobbin is usually held in a pivotally mounted bobbin frame of a winding device downstream of the changing device during the winding process or bobbin travel and is usually driven by a friction roller via a friction connection or individually.
• the winding speed of the take-up bobbin corresponds to the constant yarn delivery speed by, e.g., the spinning device.
• the thread is laid across the spool width, specifically in a crisscross pattern, using the changing device. Due to the constant thread delivery speed, the thread loosens periodically. Therefore, to maintain the desired thread tension, it is necessary to compensate for this sag as the thread's working path shortens.
• the invention aims to provide a thread storage unit that reliably maintains a largely constant thread tension during the winding process.
• the invention solves the problem by means of a thread storage unit with the features of claim 1, by means of a work station comprising such a thread storage unit according to the features of claim 8, and by means of a method for adjusting a thread tension at such a work station according to the features of claim 12.
• Advantageous embodiments of the invention are specified in the dependent claims.
• a characteristic feature of the thread storage unit according to the invention is that the thread guide arm is mounted for free rotation and has a magnetically acting first coupling element arranged at a distance from the pivot axis. Furthermore, the drive unit has a second magnetic coupling element, which is adjustable relative to the first coupling element and acts magnetically repulsively towards the first coupling element. The second magnetic coupling element is arranged on the drive unit so that it can be brought into operative contact with the first coupling element via the drive unit, whereby an adjustment of the second coupling element towards the first coupling element causes a corresponding displacement of the first coupling element, and thus a pivoting of the thread guide arm.
• the thread guide arm In contrast to previously known thread storage units, in which the thread guide arm is directly and forcibly rotated on the drive shaft of the drive unit, for example via a stationary bearing, and the force transmission consequently occurs strictly through components in contact with each other along the force flow, the thread guide arm according to the present invention is now freely rotatable, in particular mounted on the drive shaft of the drive unit. This allows the rotational force generated by the drive shaft to be transmitted to the thread guide arm without contact, utilizing magnetic means.
• the first and second coupling elements are aligned with each other such that they exert a repulsive magnetic effect on one another.
• the thread guide arm By pivoting the thread guide arm around its pivot axis into the thread path, the thread guide arm creates a loop-shaped path for the thread in the area of the thread storage unit.
• the thread guide arm engages with the thread in the area between two thread guide rollers or eyelets arranged along the thread path to create a defined loop.
• the drive unit enables contactless adjustment of the thread guide arm via the two coupling elements. If excess thread is generated during the winding process, leading to a decrease in thread tension, this excess is collected in a loop between the preferably provided pair of thread guide rollers or eyelets and the thread guide arm.
• the required thread length is released from the loop by retracting the thread guide arm.
• the second coupling element is adjusted via the drive unit in such a way that the thread guide arm is pivoted in a direction opposite to that of the thread, whereby a retraction of the thread guide arm is prevented.
• the thread tension acting on the thread guide arm results from this.
• the thread guide arm thus follows the return movement of the second coupling element and releases the required thread length in a defined manner.
• the thread storage unit therefore enables the thread tension to be kept constant at a precise and high frequency via the freely rotatable thread guide arm, allowing a winding process to be carried out even at particularly high winding speeds, and making the production of both cylindrical and conical winding bobbins particularly reliable.
• the thread guide arm moves in the direction of the thread, or in the opposite direction, without changing the distance between the first and second coupling elements, and thus without changing the magnetic spring force resulting from the distance between the two coupling elements.
• the movement of the thread guide arm can be controlled by a control system that drives the drive unit and a sensor unit that can be connected to the control system to transmit acquired sensor information.
• the control system is preferably designed to evaluate and assess the transmitted sensor information and to control the drive unit in a defined manner based on the evaluation result.
• the control system preferably comprises a control unit and an evaluation and assessment unit. These units can be one and the same or separate units. It is also possible to implement two units with a single unit.
• control system can be an integral part of the thread storage device or a separate component.
• the arrangement of the control system can also be freely chosen.
• the control system can be located in a central machine control unit and/or separate from the textile machine at a workstation that includes the thread storage unit. Redundant control is also possible by providing two such mutually checking or verifiable control systems.
• the sensor unit which can be connected to the control system, can preferably be used to detect the rotational movement and/or the position of the thread guide arm.
• the sensor information acquired by the sensor unit can then also be used to determine changes in the distance between the two coupling elements resulting from changes in thread tension. If the thread guide arm is in a position shifted towards the second coupling element compared to the position set by the control system, i.e., if the distance between the first and second coupling elements decreases, the sensor unit can detect changes in the distance between the first and second coupling elements.
• the magnetically generated spring force acting between the first and second coupling elements increases.
• the control system can determine the thread tension and, consequently, the thread tension.
• the thread tension can be checked, adjusted, and/or maintained by changing the position of the second coupling element relative to the first coupling element via appropriate control of the drive unit.
• the thread storage unit thus makes it possible to keep the thread tension constant at a particularly precise and high frequency.
• the design of the displacement of the second coupling element relative to the first coupling element by means of the drive unit can, in principle, be implemented in any way.
• linear drives are conceivable that adjust the second coupling element linearly in the direction of the first coupling element perpendicular to the pivot axis, thus causing a displacement of the thread guide arm.
• the second coupling element is arranged on a support that is adjustable about the pivot axis of the thread guide arm by means of the drive unit, in particular coaxially.
• the second coupling element is adjustable about the pivot axis of the thread guide arm, with the second coupling element being arranged on a support connected to the drive unit.
• the rotation of the support about the pivot axis of the thread guide arm allows for the use of particularly space-saving rotary drives to adjust the second coupling element.
• rotation of the second coupling element which is preferably arranged at the same distance from the pivot axis as the first coupling element, provides a particularly smooth and reliable adjustment, enabling the control system to precisely reposition the thread guide arm by repositioning the support.
• the arrangement of the first coupling element on the thread guide arm is basically free. Selectable. According to a particularly preferred embodiment of the invention, the first coupling element is detachably attached to the thread guide arm and/or the second coupling element is detachably attached to the drive unit.
• This embodiment of the invention makes it possible to easily replace the first and/or second coupling element as needed, so that adjustments to different production conditions, which may require different magnetic effects, can be made easily. In addition, maintenance and repair work can be carried out particularly easily and quickly.
• the design of the drive unit for relocating the second coupling element, in particular the carrier is generally freely selectable, and various motor drives can be used.
• the drive unit comprises an electric motor, in particular a stepper motor, with a drive shaft that is rotationally fixed to the carrier and on which the thread guide arm is freely rotatable.
• the guide arm has a bearing unit, in particular a bushing element, at a free end, by means of which the thread guide arm can be mounted onto the free end of the drive shaft.
• the bearing unit is designed to mount the thread guide arm freely rotatable on the free end of the drive shaft, independent of any rotational movement of the drive shaft, i.e., without torque.
• the thread guide arm has a thread guide section, in particular a thread guide eyelet or roller, at its other free end for contacting and guiding the thread.
• a thread guide section in particular a thread guide eyelet or roller, at its other free end for contacting and guiding the thread.
• the reversing electric motor enables particularly precise adjustment of the support about the pivot axis of the thread guide arm.
• the drive shaft serves to mount the thread guide arm so that it can rotate freely.
• a freely rotatable mounting or free rotation generally refers to a torque-free connection between the drive shaft and the thread guide arm, so that the drive shaft serves solely to pivot, and in particular to pivot, the thread guide arm. does not transmit any torque.
• a corresponding design of the thread storage unit enables its particularly compact design, while ensuring in a particularly reliable manner that a second coupling element arranged on the carrier can be adjusted around the drive shaft by the same circumference as the first coupling element, which is arranged on the thread guide arm at a corresponding distance from the axis of the drive shaft.
• the design such that the first and second coupling elements produce a magnetic repulsion effect towards each other is fundamentally freely selectable.
• the first and/or second coupling element can be designed as electromagnets whose magnetic fields are aligned to generate a repulsive effect.
• the electromagnets can be controlled via the control system, allowing different magnetic fields to be generated as needed, thus enabling the repulsion effect to be adjusted and, in particular, regulated via the corresponding control system.
• connection of the carrier to the drive unit in particular to a preferably provided drive shaft of an electric motor, can be achieved by simple flange connections.
• the carrier is arranged on a coupling disk that is coaxially connected to the drive shaft and non-rotatably connected to the drive shaft.
• the use of a coupling disk ensures particularly reliable displacement of the carrier and the second coupling element connected to the carrier about the pivot axis of the thread guide arm.
• the coupling disk can bear against a corresponding counter surface of an advantageously provided electric motor for planar guidance.
• a working station in particular a spinning or winding station, of a textile machine
• the working station is further equipped with a yarn delivery device for supplying a yarn, a changing device for changing the supplied yarn, and a yarn winding device for winding the changed yarn onto a take-up bobbin.
• the yarn delivery device, the changing device, and the yarn winding device are arranged along a yarn path for the corresponding processing of the yarn.
• the yarn path is such a path from the delivery point to the winding point, along which the yarn runs during its bobbin journey without being influenced by the yarn storage unit.
• the yarn storage unit is also arranged along the yarn path between the yarn delivery device and the changing device in order to push the running yarn out of the yarn path during its bobbin journey by means of the pivoting movement of the yarn guide arm.
• the thread guide arm is arranged along the thread path between two thread guide rollers or eyelets, over or through which the thread is guided during its journey around the spool.
• the thread guide rollers or eyelets can be supported by a paraffin waxing unit located upstream of the changing device along the thread path and arranged upstream of a paraffin wax body of the paraffin waxing unit. This allows for an arrangement of the thread guide arm close to the changing device.
• the work station is assigned a control system as described above and a sensor unit, also described above, which can be connected to the control system for exchanging information.
• the sensor unit is designed and arranged to detect the rotational movement and/or position of the thread guide arm and to transmit sensor information to the control system.
• the control system is preferably designed to evaluate and assess the transmitted sensor information and to control the drive unit in a defined manner based on the evaluation result. More preferably, the control system is designed to control the drive unit for regulating the thread tension and/or the amount of thread stored in the guided thread, and also, more preferably, to control the sensor unit for retrieving sensor information.
• the thread storage unit 1 has a thread guide arm 2, which is arranged at the work location in the thread path F of a thread being wound onto a take-up spool, with a thread guide eyelet 13 located at its free end, the thread being guided through the thread guide eyelet 13.
• the thread guide arm 2 is pivotably mounted on a drive shaft 16 of an electric motor 5 of a drive unit 4 of the thread storage unit 1, wherein the thread guide arm 2 has a bushing 18 for arrangement at the free end of the drive shaft 16, so that the thread guide arm 2 is mounted on the drive shaft 16 without torque.
• the bushing 18 is further connected to a holder 9 connected to the thread guide arm 2, which has an opening for receiving a first coupling element 6 designed as a permanent magnet.
• the yarn storage unit 1 is positioned on the yarn path F such that the yarn guide arm 2 with its guide eye 13 can pivot into the yarn path F to push the running yarn out of its path F transversely to the direction of arrangement of the yarn guide rollers 21.
• the thread comes into contact with the thread guide rollers 21, forming a thread loop of defined size between the thread guide rollers 21.
• the size of the thread loop is controlled by the thread storage unit 1, depending on the detected rotational movement or position of the thread guide arm 2, via the control system, which controls the electric motor 5 and consequently the thread guide arm 2.
• the setting and regulation of a thread tension that is advantageously kept constant during the bobbin journey is varied as needed.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Quality & Reliability (AREA)
• Chemical & Material Sciences (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Tension Adjustment In Filamentary Materials (AREA)
• Spinning Or Twisting Of Yarns (AREA)
• Mechanical Engineering (AREA)

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• 2021
  • 2021-06-10 LU LU102827A patent/LU102827B1/de active
• 2022
  • 2022-06-08 EP EP25207208.7A patent/EP4667403A3/fr active Pending
  • 2022-06-08 EP EP22177708.9A patent/EP4101800B1/fr active Active
  • 2022-06-08 CN CN202210638981.7A patent/CN115465725B/zh active Active
  • 2022-06-09 US US17/836,401 patent/US12384649B2/en active Active
  • 2022-06-09 JP JP2022093528A patent/JP2022189782A/ja active Pending

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