WO2020144530A1 - Procédé permettant de positionner précisément une broche dans un enrouleur automatique de type à tourelle - Google Patents

Procédé permettant de positionner précisément une broche dans un enrouleur automatique de type à tourelle Download PDF

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Publication number
WO2020144530A1
WO2020144530A1 PCT/IB2019/061387 IB2019061387W WO2020144530A1 WO 2020144530 A1 WO2020144530 A1 WO 2020144530A1 IB 2019061387 W IB2019061387 W IB 2019061387W WO 2020144530 A1 WO2020144530 A1 WO 2020144530A1
Authority
WO
WIPO (PCT)
Prior art keywords
turret
spindle
control system
bobbin
winding
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.)
Ceased
Application number
PCT/IB2019/061387
Other languages
English (en)
Inventor
Siddharth LOHIA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lohia Corp Ltd
Original Assignee
Lohia Corp Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Lohia Corp Ltd filed Critical Lohia Corp Ltd
Priority to BR112020020026-3A priority Critical patent/BR112020020026B1/pt
Priority to EP19908167.0A priority patent/EP3746387B1/fr
Priority to CN201980017244.1A priority patent/CN111819142B/zh
Publication of WO2020144530A1 publication Critical patent/WO2020144530A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B65H54/40—Arrangements for rotating packages
    • B65H54/52—Drive contact pressure control, e.g. pressing 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
    • 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
    • B65H67/044—Continuous winding apparatus for winding on two or more winding heads in succession
    • B65H67/048—Continuous winding apparatus for winding on two or more winding heads in succession having winding heads arranged on rotary capstan head
    • 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 an automatic yarn winding turret type device that can reliably position a spindle for winding after the bobbin changeover.
  • the automatic turret type winder is used for winding of continuously arriving tapes, threads, or bands onto a bobbin.
  • a pair of bobbin holders also known as spindles— are mounted on the opposite ends of a rotatable turret mounted on suitable machine frame.
  • spindles are mounted on the opposite ends of a rotatable turret mounted on suitable machine frame.
  • Each spindle is alternately displaced from the normal winding position to the doffing position by every half rotation of the turret.
  • the turret keeps on rotating in the same direction at required time intervals or when running spindle reaches its maximum length of carrying winding tapes.
  • Each spindle needs precisely controlled rotation around its own axis, so may be driven independently by an electric motor through a suitable mechanism such as a belt and pulley arrangement or with an independent direct driving electrical motor system.
  • the encoders or other suitable devices are mounted on the motor for monitoring the motor revolutions, and the signal is communicated to an electronic controller with the help of a suitable cable.
  • the controller further sends the electrical signals to the inverter/drive of the active motor which determines the power to be given for the motor driving the spindle.
  • Automatic turret type winders were introduced for providing bobbins of polyolefin flat/fibrillated yarns and to improve efficiency, reduce wastages. Automatic changeover process replaces spindle carrying yarn bobbin with empty spindle.
  • the turret is rotated by using a clutch and a pulley in synchronicity. Turret rotation is performed by releasing clutch and transferring the driving force to the pulley for rotation. After the turret rotation, correct positioning of empty bobbin is done by drifting bobbin in reverse direction towards the CAM box pressure roller. Ideally, spindle is positioned such that pressure roller should exert pressure uniformly on spindle present for winding. Reverse movement of turret carrying spindle is controlled according to the pre-set time and speed parameters in the control system. Practically, in conventional systems, turret movement is not uniform, and therefore as spindle position after changeover is not precise and motion smooth as required, due to change in mechanical condition.
  • Machines of the type being discussed here are generally not operated under entirely dust-free environment. Therefore, as time progresses, accumulation of foreign particles on the mechanical components of the machinery increases even after taking abundant precaution to clean and maintain the machine. Accumulation of particulate matter provides hindrance to smooth motion of moving elements over a period of time. In other words, the system's resistance to smooth movement of components increases due to general wear and tear and accumulation of particulate matter.
  • the turret could get jammed due to accumulation of dust particles or may be extra tightened or loosen during maintenance cycle - any of which could affect the turret rotation by making it fast/slow and/or jerky in nature.
  • This jerky behavior is generally known as‘Mechanical glitches’.
  • Conventional winders are known to unavoidably suffer from improper spindle positioning in respect to CAM pressure roller on account of said mechanical glitches. Improper spindle positioning causes a gap between the spindle bobbin which is ready to be wound and the pressure roller, which in turn produces uneven winding tension and therefore non-uniform package density.
  • Another object of the present invention is to provide a system with higher accuracy of reaching correct turret position, which reduces possibility of pushing extra on pressure roller due to lower sensitivity in earlier positioning methods.
  • the invention relates to an automatic turret type yam winding device.
  • the automatic bobbin changeover process involves winding of slit film tape/yarn on a bobbin, followed by rotation of the turret to bring an empty bobbin into the winding position.
  • Pressure rollers are provided to ensure consistent and accurate winding.
  • the accurate relative positioning of the bobbins and pressure rollers is important. Wear and tear and particulate dust may cause malfunctioning of winder systems which may affect accuracy of turret rotations and relative positioning of the bobbins and pressure rollers, especially when the turret rotation during bobbin changeover stage is done in a single rotation.
  • the invention provides a system and a method to position spindle more precisely in turret type automatic winder, especially to identify correct stationing position of turret spindle after reverse movement post doffing. It involves, during the bobbin changeover process, the step of rotating the turret in at least two discrete rotational movements carried out at controlled speeds, whereby the empty bobbin assumes its accurate winding position.
  • the turret rotation is controlled by sensing the current in the motors controlling the spindles.
  • Figure 1 shows a schematic of a turret with two spindles
  • Figure 2 shows a schematic where the pre-set tape length is reached
  • Figure 3 shows a schematic of the turret under the bobbin changeover process
  • Figure 4 shows a schematic representing completion of the automatic changeover process and the drifting of spindle in respect to the pressure roller
  • Figure 5 shows a schematic of positioning of the turret and the spindle at correct position
  • Figure 6 shows the comparative change in the currents of the spindle and the turret motor as a percentage of the rated values
  • the present invention discloses an improved procedure for precise Turret positioning after the bobbin changeover.
  • the terms ‘precise’, ‘precisely’ or ‘accurate’ used in this specification in the context of positioning or the spindle or the turret are meant to convey that a good or close to good position of turret or spindle is achieved whereby the best possible quality bobbin is produced.
  • Figure 1 shows the present invention in an operational state. It shows a turret with spindles, with one spindle in a position to start winding. Each spindle is driven by an associated spindle motor. There is also a motor that drives the turret. Motors are not shown in figure.
  • Figure 1 shows the present invention in an operational state. It shows a turret (1) at the start of a winding operation. It has empty first and second bobbins (7, 7A) mounted on two spindles (2A and 2B) with their centres respectively termed as points A and A', which fall on what is termed as a winding-position-line (9) or a bobbin positional axis/line, and where one of the two spindles (2A) is in a winding position to start winding.
  • the position of the winding positioning line (9), which is an imaginary axis, is a position that is suitable for winding of yarn and will be known to a person skilled in the art.
  • the yam/tape (3) is delivered after cutting and conditioning from tape line machine from direction‘a’ (as indicated in Figl) after passing through a dancing arm which regulates tape tension.
  • the tape line speed of discharging tapes varies from 200 to 800 meters per minute; the density of the tape material varies from
  • Each spindle is driven by an associated spindle motor. There is a motor that drives the turret.
  • Tape/yam (3) winding starts on the presently empty first bobbin (7) after a CAM box (4) bows down by an angle‘Q’ (measured from the vertical) in the direction ‘b’ (indicated by a counter-clockwise arrow in Figure 1). The magnitude of the angle is dependent on the turret geometry/design and would be known to a person skilled in the art. As the tape (3) winding progresses, the first bobbin (7) package diameter grows to a predetermined value.
  • a bobbin changeover is expected whereupon the common controller for the winder head instructs the motor of turret driving system (not shown in figures) to rotate for the bobbin changeover, such that the now empty second bobbin (7 A) assumes the winding position.
  • Figure 2 shows a position of the CAM box (4) where the preset first bobbin (7) diameter after winding of yarn has been achieved.
  • the CAM box now rotates in a clockwise direction (i.e. a direction opposite to b) and the pressure roller (5) retracts from the wound first bobbin (7).
  • a device that carries out the aforementioned rotation of the CAM box (4) may be an electromechanical, or a pneumatic or hydraulic system.
  • the turret (1) begins to rotate in a direction indicated by arrow 'c' in Figure 3, which shows the turret in a state of transitional movement.
  • the turret reaches a position such that the now empty second bobbin (7 A) which is mounted on the spindle (2B) reaches a position close to the winding position ( Figure 4).
  • the centre (A') of the second bobbin (7 A) should precisely be at the position previously occupied by the centre (A) of the now- filled first bobbin (7) at the start of its winding.
  • the line joining the bobbin centres (A-A') achieved at the end of the transitional movement is not coincidental with the final position for winding represented by the winding positional line (9); actual position of the line joining centres of both bobbins (A- A') at the end of the transitional movement is deliberately drifted by an angle‘f’ (see Figure 4), termed as the displacement angle, with respect to required winding positional line (9).
  • the displacement angle (f) may be up to 45°.
  • the actual positional line joining the centres (A, A') of two bobbins (7, 7A) at the end of first rotational movement is termed as a close-by positional line (9').
  • the final position of the second bobbin (7 A) is arrived at as a result of at least two discrete rotational movements.
  • the total rotational movement comprises a first and a second rotational movement.
  • first rotational movement also termed as first rotational movement (indicated by arrow c in Figure 3) for the purpose of this description, the empty second bobbin (7A) is intentionally stopped at the close-by position (9').
  • the pressure roller leans on the empty second bobbin (7 A) and exerts a gentle pressure on it before the winding can begin.
  • the rotational speed of the first rotational movement depends on various parameters such as the yarn type and denier, line speed, winder designs in general, and would be known to a person skilled in the art.
  • the first rotational movement is followed by a second rotational movement (indicated by direction d in Figure 4) in the direction required for the second bobbin (7 A) to attain the final intended position, which takes place at a speed slower than the first rotational speed.
  • a second rotational movement indicated by direction d in Figure 4
  • the second rotational movement continues and the second bobbin (7 A) approaches its final winding position, and at some point touches the pressure roller (5) which may have already reached its predetermine location or in process of reaching it.
  • the current in the spindle motor starts to rise.
  • the second rotational movement is stopped when the current in the spindle motor reaches a predetermined value, indicating that the pressure roller (5) and the second bobbin (7 A) are in the required final relative positions where the winding can begin.
  • the winding of the second bobbin (7 A) may have already started before the pressure roller (5) and the second bobbin (7 A) assume their required final relative positions.
  • the rotational speed (measured in RPM) of the second rotational movement may be up to 25% of the first rotational speed. This is done because controlling the movement at slow speeds to attain accurate final positioning of the second bobbin (7 A) is far more feasible or achievable than trying to do so at high speed carried out in a single rotational movement. It is preferable, but not necessary, that the position of the second bobbin (7 A) at the end of the first rotational movement is past the intended final position such that the directions c and d may be opposite to each other.
  • the position achieved by the second bobbin (7 A) at the end of the first rotational movement may optionally be before its final intended position.
  • the second rotational movement takes places in the same direction as the first rotational movement, i.e. the directions c and d may be same (i.e. both may be clockwise).
  • the final winding position of the second bobbin (7 A) (see Figure 5), is such that the second bobbin (7 A) touches the pressure roller (5) at a position where tape tension does not vary much during winding process.
  • the second bobbin (7 A) reaches required position by rotating slightly in reverse direction‘d’ (see Figure 4).
  • this reverse motion (d) is controlled by set parameters, however, sometimes due to the problems related to the mechanical adjustment of the parts facilitating the motion, the spindle does not reach the correct position. There is therefore a need to provide a procedure that will identify the exact position of the spindle.
  • the present invention also discloses a system to control motions of the turret and the spindles (see Figure 7). It comprises a first control system (10) to control the rotational motion of the turret and a second control system (11) to control the rotational motion of the spindle. It also comprises a master control system (12) which controls both systems (10, 11) and receives signal/information from and sends command to the two control systems (10, 11). In other words, at the start of the winding operation, the master control system (12) sends a command to the first control system (10) to start the first rotational motion and stop it upon meeting the criteria outlined in this disclosure. Similarly, the master control also sends a command to the first control system (10) to start the second rotational motion at an appropriate time.
  • the master control system (12) receives information from the second control system (11) regarding the upsurge in the spindle current and upon the said spindle current reaching its set threshold value, the master control system (12) instructs the first control system (10) to stop the second rotational motion of the turret and lock it such that the second bobbin (7 A) remains in the optimum position.
  • the development of the upsurge in the currents in the motors of the turret and the spindle are illustrated in the comparative graph shown Figure 6 wherein data points‘X’ and ⁇ ’ represent, respectively, the points at which the spindle motor current and the turret motor current start increasing as a result of the spindle touching the pressure roller (5) during turret positioning.
  • a key aspect of the present invention is that the current in the motor that drives the spindle is used to control the stoppage of rotational movement of the turret once the spindle touches the pressure roller.
  • a key aspect of the present invention is that the current in the motor that drives the spindle is used to control the stoppage of rotational movement of the turret once the spindle touches the pressure roller.
  • the present invention further improves accuracy and responsiveness of the turret movement in regard specified position by sensing the spindle motor current such that when the spindle touches the pressure roller (5), the current of the active spindle motor surges to a definite value more sharply and in a short period up to a threshold value.
  • the threshold value can be pre-set below or higher than or equal to motor rated value for releasing command as current reaches set level for specified time duration; when trigger value of spindle motor current reaches to specific value, the master control system (12) sends a command to the first control system (10) to stop at the initial winding position.
  • a method to position spindle precisely in turret type automatic winder comprising a rotatable turret (1) driven by a turret motor, said motor being controlled by a turret driving system and said spindle being driven by a spindle motor controlled by a spindle driving system, on which turret (1) at least a first and a second bobbins (7, 7 A) are mounted on respective spindles (2A, 2B) in a diametrically opposite position along a winding-positional-line (9), and wherein the first bobbin (7) is positioned in a position of winding a tape/yam(3) on it whereby, at the start of the tape winding process, said first bobbin (7) touches a pressure roller (5) provided on said winder, said method comprises the step of, upon said first bobbin (7) reaching its predetermined package size, rotating the turret (1) in at least two discrete rotational movements carried out at controlled speeds,
  • the direction of rotation of said second rotational movement is opposite to the direction of rotation of said first rotational movement.
  • the direction of rotation of said second rotational movement is same as the direction of rotation of said first rotational movement.
  • the invention also discloses a system to position spindle precisely in turret type automatic winder using the method disclosed in earlier embodiments.
  • the system (see Figure 7) comprises:
  • said master control system (12) upon receiving information from said second control system (11) that the increase in said spindle current has reached its pre-set threshold, sends a command to said first control system (10) to stop said second rotational motion of said turret and lock said turret in that position.

Landscapes

  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
  • Replacement Of Web Rolls (AREA)
  • Winding Filamentary Materials (AREA)

Abstract

La présente invention concerne un dispositif d'enroulement automatique de fil de type à tourelle. L'invention concerne un dispositif et un procédé permettant de positionner précisément une broche dans un enrouleur automatique de type à tourelle, pendant le changement de bobine. Cela implique, pendant le processus de changement de bobine, l'étape de rotation de la tourelle par au moins deux mouvements de rotation discrets effectués à des vitesses commandées, grâce à quoi la bobine vide adopte sa position d'enroulement adéquate. Selon un aspect important de l'invention, la rotation de la tourelle est commandée par la détection du courant dans les moteurs commandant les broches. La présente invention concerne également un système permettant de commander des mouvements de la tourelle et des broches. Le système comprend un premier système de commande (10) permettant de commander le mouvement de rotation de la tourelle et un second système de commande (11) afin de commander le mouvement de rotation de la broche. Il comprend également un système de commande maître (12) qui commande les deux systèmes (10, 11) et reçoit des signaux/informations des deux systèmes de commande (10, 11) et leur envoie des instructions.
PCT/IB2019/061387 2019-01-07 2019-12-27 Procédé permettant de positionner précisément une broche dans un enrouleur automatique de type à tourelle Ceased WO2020144530A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BR112020020026-3A BR112020020026B1 (pt) 2019-01-07 2019-12-27 Método e sistema para posicionar um fuso com precisão em um bobinador automático do tipo torre
EP19908167.0A EP3746387B1 (fr) 2019-01-07 2019-12-27 Procédé permettant de positionner précisément une broche dans un enrouleur automatique de type à tourelle
CN201980017244.1A CN111819142B (zh) 2019-01-07 2019-12-27 在转塔式自动络纱机中精确定位锭子的方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN201911000599 2019-01-07
IN201911000599 2019-01-07

Publications (1)

Publication Number Publication Date
WO2020144530A1 true WO2020144530A1 (fr) 2020-07-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2019/061387 Ceased WO2020144530A1 (fr) 2019-01-07 2019-12-27 Procédé permettant de positionner précisément une broche dans un enrouleur automatique de type à tourelle

Country Status (4)

Country Link
EP (1) EP3746387B1 (fr)
CN (1) CN111819142B (fr)
TW (1) TWI768276B (fr)
WO (1) WO2020144530A1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180297809A1 (en) * 2015-12-03 2018-10-18 Siddharth Lohia A Method To Position Spindle Precisely In Turret Type Automatic Winder

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TW252998B (fr) * 1992-03-05 1995-08-01 Barmag Barmer Maschf
JP2982733B2 (ja) * 1997-02-26 1999-11-29 村田機械株式会社 紡糸巻取機の巻取制御装置
TW483866B (en) * 1997-03-25 2002-04-21 Barmag Barmer Maschf Method of winding an advancing yarn and takeup machine for carrying out such method
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US20180297809A1 (en) * 2015-12-03 2018-10-18 Siddharth Lohia A Method To Position Spindle Precisely In Turret Type Automatic Winder

Also Published As

Publication number Publication date
TWI768276B (zh) 2022-06-21
EP3746387B1 (fr) 2023-07-26
CN111819142A (zh) 2020-10-23
CN111819142B (zh) 2022-04-29
BR112020020026A2 (pt) 2021-01-05
EP3746387A1 (fr) 2020-12-09
TW202031582A (zh) 2020-09-01
EP3746387A4 (fr) 2021-05-05

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