Classifications

• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
  • D01D4/00—Spinnerette packs; Cleaning thereof
  • D01D4/04—Cleaning spinnerettes or other parts of the spinnerette packs
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
  • D01D13/00—Complete machines for producing artificial threads
  • D01D13/02—Elements of machines in combination
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
  • D01D7/00—Collecting the newly-spun products

Definitions

• Present invention relates to a method of melt-spinning and winding synthet- ic yarns, and an equipment for realizing the method.
• melt-state thermoplastics are sprayed out, under an operating pressure by spinneret capillaries of spinneret nozzle plate. Con- tinuous long melts which are sprayed out along gravity direction are formed into continuous filaments under compulsive cooling air. Under influence of cooling air, monomers or low polymers prone to linger on surface of spin- neret nozzle plate of spinneret solidify into impurities or coking materials. Therefore it is necessary to clean spinneret nozzle plate on a regular basis. Normally one spinning zone is assigned with one operator who takes re- sponsibility of wiping spinneret nozzle plates of said spinning zone.
• the general workflow of wiping is, first scraping surface of spinneret nozzle plate, then spraying silicone oil onto surface of spinneret nozzle plate, af- terwards second-time scraping, then second-time silicone oil spraying.
• Con- sidering normal configuration that usually each spinning position has five or ten spinnerets with spinneret nozzle plates, heavy wiping task taken on by operators is inherent with deficiency of low efficiency.
• present in- vention provides a method of melt-spinning and winding synthetic yarns, and an equipment for realizing the method, to solve aforementioned prob- lem.
• Technical solutions which are used to achieve the aim are listed as fol- lows.
• a method of melt-spinning and winding synthetic yarns wherein a polymer melt is conveyed through a spin pump and fed to a plurality of spinnerets which extrude the polymer melt into a plurality of yarns respectively, wherein the yarns are wound into a plurality of bobbins by a winding device and wherein the spinnerets are regularly maintained by wiping a spinneret nozzle plate, the maintenance of at least one of the spinnerets is initiated by manual pressing a wiping button which is connected to a machine control unit and the machine control unit generates a control command which is transmitted to a wiping robot.
• wiping button which is connected to a machine control unit
• the machine control unit generates a control command which is transmitted to a wiping robot.
• the machine control unit checks whether the winding device is in winding status and sends different control commands to the wiping robot based on different check results.
• the machine control unit Prior to start of wiping action of the wiping robot, it is necessary that the machine control unit knows status of the winding device, given that spin- neret nozzle plate wiping has to be performed with no influence on bobbin formation on the winding device. Based on abovementioned reason, if the machine control unit checks that the winding device is in winding status, the machine control unit sends to the wiping robot a signal to wait wiping action until bobbin is full. Another possibility is, if the machine control unit checks that the winding device is not in winding status, the machine control unit sends to the wiping robot a signal to immediately start wiping action.
• the wiping robot is able to move out of a base station and stops in one of several maintenance positions and positions itself.
• the wiping robot is stationed at the base station which is adjacent to the spinning zone in non-wiping time. After operator presses down the wiping button of corre- sponding spinning position, the wiping robot moves to corresponding spin- ning position in a manner of self-positioning.
• present invention further pro- vides an equipment for melt-spinning and winding a plurality of yarns, which could achieve automatic wiping of spinneret nozzle plate. It is equipped with a spinning device having at least one spinning pump and a plurality of spinnerets, with a spinning beam for receiving the detachably held spinnerets, with a winding device for winding the yarns to a plurality of bobbins and a machine control unit which is connected at least to a wind- ing control unit of the winding device, wherein the spinning pump is con- trolled by a spinning pump control unit, wherein, a wiping button is con- nected with the machine control unit and the machine control unit is con- nected with a robot control unit of a wiping robot, which is moveable along a line parallel to the spinnerets.
• a spinning device having at least one spinning pump and a plurality of spinnerets, with a spinning beam for receiving the detachably held spinneret
• the machine control unit has a checking unit which is connected to the winding control unit of the winding device so as to check if the winding device is in winding status. Based on different check results, the machine control unit sends out different control commands to the robot control unit of the wiping robot.
• Figure 1 schematically shows, when the wiping robot is stationed at base station, front view diagram of an equipment for melt-spinning and winding synthetic yarns according to present invention
• Figure 2 schematically shows, when the wiping robot is at wiping position, front view diagram of an equipment for melt-spinning and winding synthet- ic yarns according to present invention
• Figure 3 schematically shows, when the wiping robot is at wiping position before start of wiping action, partial side view diagram of an equipment for melt-spinning and winding synthetic yarns according to present invention
• Figure 4 schematically shows, when the wiping robot is at wiping position after start of wiping action, partial side view diagram of an equipment for melt-spinning and winding synthetic yarns according to present invention.
• Figure 1 schematically presents front view of an equipment for melt- spinning and winding synthetic yarns according to present invention, and exemplarily shows two spinning devices 1.1 and 1.2 which are side by side. Due to that a winding device below the spinning device 1.1 has the same configuration with a winding device 14 below the spinning device 1.2, only the winding device 14 below the spinning device 1.2 is shown for the sake of simplicity.
• the spinning device 1.2 includes a spinning beam 23 with a heating function. Downside of the spinning beam 23 is maintained with multiple spinnerets 6.1-6.5. In present embodiment, five spinnerets are maintained at downside of the spinning beam 23.
• a spinning pump 2.1 which is designed as a multi-pump is disposed above the spinning beam 23. The spinning pump 2.1 is connect- ed with the spinnerets 6.1-6.5 via separate melt pipelines. The melt pipe- lines and the dismountable spinnerets 6.1 - 6.5 are disposed within the spinning beam 23 to ensure the melts are kept in melting state before being sprayed out. The polymer melt in melting state is transported to the spinner- ets 6.1-6.5 via the pipeline under a pressure generated by the spinning pump
• the spinning pump 2.1 is controlled by a spinning pump driver 3.1.
• the spinning pump driver 3.1 is controlled by a spinning pump control unit
• the spinnerets 6.1-6.5 has multiple spinneret capillaries within a spin- neret nozzle plate, from which the melts are sprayed out. Under cooling influence of a cooling device not shown the melt turns into continuous fil- ament bundles after being spun out.
• a winding device 14 is used to wind the filament bundles.
• the winding device 14 is designed to have two bobbin shafts 11 and 12.
• the bobbin shafts 11 and 12 are main- tained on a rotatable rotation frame 13, so that the bobbin shafts 11 and 12 are alternately under winding status, whereby continuity of yarn winding is guaranteed.
• the bobbin shaft 1 1 is driven by a bobbin shaft driver 1 1.1.
• the bobbin shaft 12 is driven by a bobbin shaft driver 12.1.
• the rotation frame 13 is driven by a rotation frame driver 13.1.
• the inlet area of the winding device 14 is distributed with a trav- erse device 9 which provides a traverse yarn guider for each yarn.
• the trav- erse device 14 is driven by a traverse device driver 9.1.
• the bobbin shaft driver 11.1, the bobbin shaft driver 12.1, the rotation frame driver 13.1 and the traverse device driver 9.1 are controlled by a winding control unit 15.
• the equipment is further equipped with a machine con- trol unit 16 which is preferably configured by a micro-processor in the form of PC.
• the machine control unit 16 is connected with the spinning pump control unit 4.1 and the winding control unit 15.
• the equipment is fur- ther provided with a wiping robot 19 which is able to move along a direc- tion parallel to the arrangement direction of the spinnerets 6.1-6.5.
• the wip- ing robot 19 is moveably disposed on a guide rail 20 which is parallel to the arrangement direction of the spinnerets 6.1-6.5.
• the wiping robot 19 is stationed at a base station outside spinning area. The base station is the place wherein the wiping robot 19 will return to eventual- ly after finish of each wiping task.
• Length of the guide rail 20 is chosen to be covering spinnerets of all spinning devices. From the front view perspec- tive of figure 1, height of the guide rail 20 is lower than the spinnerets 6.1- 6.5.
• Figure 3 schematically shows partial side view diagram of an equipment for melt-spinning and winding synthetic yarns according to present invention, when the wiping robot is at wiping position before start of wiping action.
• the wiping robot 19 is at a position underneath the spinning beam 23 but close to outer side, such that, during non-wiping time, the wiping robot 19 will not interfere with normal spun-out filaments.
• Two sides of upper end of the wiping robot 19 is mounted with advancing wheels 22 which are driven by a motor not shown.
• the advancing wheels 22 are able to move along length direction of the guide rail 20 under motor driving.
• One side of the wiping robot 19 which faces the filaments is provided with a first telescopic arm 25 controllable to extend or retract.
• End of the first telescopic arm 25 is provided with a base 26.
• the base 26 has a second telescopic arm 27 inside, which is also controllable to extend or retract.
• Wiping element 24.1 is dis- posed on end of the second telescopic arm 27.
• the wiping robot 19 is con- trolled by a robot control unit 28.
• the spinneret 6.1 is maintained at the downside of the spinning beam 23.
• the bottom of the spinneret 6.1 is provided with a spinneret nozzle plate 29.1.
• the spinneret nozzle plate 29.1 is outside the spinning beam 23, so that the wiping robot 19 is able to wipe the underside of the spinneret nozzle plate 29.1.
• each spinning position 1.1 and 1.2 is configured with a wip- ing button 5.1 and 5.2 shown in figure 1 which are respectively electrically connected with the machine control unit 16.
• the machine control unit 16 is provided with a wireless signal emitter 18 so as to send out control com- mand signal.
• the robot control unit 28 is provided with a wireless signal receiver 21 so as to receive control command signal from the wireless signal emitter 18. The robot control unit 28 controls actions of the wiping robot 19 according to the control command signal.
• the machine control unit 16 has a checking unit 17.
• the checking unit 17 is connected with the winding control unit 15 of the winding device
• the machine control unit 16 sends cor- responding control command signal to the robot control unit 28 of the wip- ing robot 19.
• What is to follow is specific description of a method of melt-spinning and winding synthetic yarns according to present invention. To begin with, judging which spinning position should have its spinneret nozzle plates wiped is based on experience and observation. Then operators press the wiping button of corresponding spinning position. Take wiping button 5.1 for example. The wiping button 5.1 transmits an electric signal to the checking unit 17 of the machine control unit 16.
• the checking unit 17 performs communication with the winding control unit 15 of the winding device 14, to judge whether the winding device 14 is under winding work- ing status. If the checking unit 17 detects that the winding device 14 is not under winding working status, which means that there are no filaments be- ing spun out from the spinnerets 6.1-6.5, then the machine control unit 16 via the wireless signal emitter 18 sends out a control command signal of immediately start wiping action to the wireless signal receiver 21 of the ro- bot control unit 28. Meanwhile the machine control unit 16 sends a signal regarding position of the spinning position to the robot control unit 28 of the wiping robot.
• the wiping robot 19 under control the robot control unit 28 self-position to the position of corresponding spinning device 1.2 to per- form wiping task. If the checking unit 17 detects that the winding device 14 is under winding working status, then the machine control unit 16 sends out a control command signal of waiting wiping action until bobbin is full to the wiping robot. The checking unit 17 maintains communication with the winding control unit 15, until the winding control unit 15 sends a signal of finished bobbin winding. Then the machine control unit 16 initiate a pro- cess interruption and communicates with the spinning pump control unit 4.1 to stop the spinning pump 2.1.
• FIG. 4 schematically shows, when the wiping robot is at wiping position after start of wiping action, partial side view diagram of an equipment for melt-spinning and winding synthetic yarns according to present invention.
• the wiping robot 19 arrives at the spinning po- sition which needs to be wiped, the first telescopic arm 25 under action of a driver not shown extends outwardly, until the wiping element 24.1 is pushed to a position right below the spinnerets 6.1.
• the second telescopic arm 27 under a driver not shown extends upwardly, until the wiping ele- ment 24.1 is in contact with lower surface of the spinneret nozzle plate 29.1.
• the wiping element 24.1 is preferably comprised of a turnable brush and an injector which could inject silicon oil.
• the wiping element 24.1 is controllable to perform the following sequence: first scraping - first silicon oil injection - second scraping - second silicon oil injection.
• FIG. 2 schematically shows front view diagram of present invention when wiping robot self-positions itself to the spinning position which needs wip- ing.
• the wiping robot 19 has five wiping elements 24.1- 24.5 which are spaced apart.
• Each wiping element 24.1-24.5 could respec- tively align with the spinnerets 6.1-6.5, such that five spinneret nozzle plates could be simultaneously wiped, which could improve wiping effi ciency and reduce wiping time for each spinning position.
• the first telescopic arm 25 and the second tele- scopic arm 27 retract under the action of a driver not shown, the wiping robot 19 moves back to the base station under control of the robot control unit 28.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Textile Engineering (AREA)
• Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Applications Claiming Priority (2)

Publications (1)

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• 2018
  • 2018-05-04 CN CN201810418948.7A patent/CN110438575B/zh active Active
• 2019
  • 2019-04-26 EP EP19720539.6A patent/EP3788186A1/en active Pending
  • 2019-04-26 WO PCT/EP2019/060711 patent/WO2019211181A1/en active Application Filing
  • 2019-04-26 JP JP2020561686A patent/JP7346452B2/ja active Active

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