EP0630845A1 - Procédé et dispositif de distribution de fil enroulé sur une bobine au moyen d'un rouleau d'entraînement et un guide-fil - Google Patents

Procédé et dispositif de distribution de fil enroulé sur une bobine au moyen d'un rouleau d'entraînement et un guide-fil Download PDF

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Publication number
EP0630845A1
EP0630845A1 EP94201747A EP94201747A EP0630845A1 EP 0630845 A1 EP0630845 A1 EP 0630845A1 EP 94201747 A EP94201747 A EP 94201747A EP 94201747 A EP94201747 A EP 94201747A EP 0630845 A1 EP0630845 A1 EP 0630845A1
Authority
EP
European Patent Office
Prior art keywords
bobbin
yarn
distance
winding
turns
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.)
Withdrawn
Application number
EP94201747A
Other languages
German (de)
English (en)
Inventor
Nereo Marangone
Luciano Bertoli
Giorgio Colomberotto
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.)
Savio Macchine Tessili SpA
Original Assignee
Savio Macchine Tessili SpA
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
Priority claimed from IT001377A external-priority patent/ITMI931377A1/it
Priority claimed from IT93MI001376A external-priority patent/IT1264892B1/it
Application filed by Savio Macchine Tessili SpA filed Critical Savio Macchine Tessili SpA
Publication of EP0630845A1 publication Critical patent/EP0630845A1/fr
Withdrawn legal-status Critical Current

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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
    • B65H54/38—Arrangements for preventing ribbon winding ; Arrangements for preventing irregular edge forming, e.g. edge raising or yarn falling from the edge
    • 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

  • This invention relates to a method and apparatus for distributing wound yarn on a bobbin under formation by means of a yarn guide and a drive roller in a collection station for textile yarns, bobbin and roller having shape different each other.
  • this invention relates to a method and apparatus for distributing wound yarn on a conical bobbin driven by a cylindrical roller, or for distributing wound yarn on a cylindrical bobbin driven by a cone.
  • said apparatus comprises a control unit based on a mini-computer into which the operative winding data are fed for processing and comparing with the data arriving from transducer probes or similar means, to provide at the mini-computer output a number of command signals for activating and controlling the motive source which angularly positions the bobbin carrier arm so that the collection station operates in regions not subject to the ribbing effect.
  • the term “yarn” or “filament” indicates any type of filiform material
  • the term “bobbin” indicates any package formed from yarn wound in substantially helical turns.
  • Winding by dragging is known, in which the bobbin is driven by friction by a roller driven by the drive shaft while a yarn guide moves the yarn reciprocatingly.
  • this roller can be a cylindrical roller and then the produced bobbin is conical, or this roller can be a conical or frusto-conical element and then the produced bobbin is cylindrical.
  • ribbing is known hereinafter as ribbing, taping or "mirror effects", the terms being used interchangeably.
  • ribbing defects arise during winding if the ratio of the number of revolutions of the bobbin to the number of double beats of the traverser device or the number of complete to-and-fro movements of the yarn per unit of time is a whole number.
  • the aim of any winding system is therefore to deposit layers which do not generate problems during the subsequent use of the bobbin.
  • the most widely used methods involve discontinuity in the rotation of the bobbin under formation by raising it periodically from its driving contact with the underlying drive roller.
  • the bobbin which continues to rotate, gradually slows down until it is again brought into contact with the drive roller.
  • It also forms part of the known art to periodically interrupt the rotation of the drive roller by cutting power to its electric drive motor, or by disengaging the roller from the motor by a clutch or the like.
  • An object of the present invention is to obviate the aforementioned drawbacks by providing a method and automatic apparatus producing a faultless result which is reliably reproducible in terms of the quality of the winding, embodied essentially by the need to achieve yarn distribution which is uniform both widthwise and depthwise in the formation of bobbins of any size.
  • a further object of the invention is to form bobbins using continuous control of the peripheral distance between each turn and the next which is able to recognise in advance that ribbing is about to take place and which operates in the sense of varying the transmission ratio in a controlled manner to the extent strictly necessary to maintain a predetermined distance between turns, until conditions arise which indicate that the preceding conditions of potential ribbing no longer exist.
  • Said control acts by eliminating ribbing of the 1st, 2nd, 3rd, 4th ... order, and can also be extended to ribbing of higher order, even though this is not necessary in that the negative effects induced by ribbing of an order exceeding the 4th are insignificant in the practical use of the bobbin.
  • a further object of the invention is to wind the yarn in such a manner as to produce well bound bobbins of homogeneous compactness or softness in each point or region of the bobbin under formation, such as to make it perfectly permeable to dyeing liquids, which are able to lap each side of the wound yarn.
  • the method of the present invention which enables the deposition distance between two yarn turns successively deposited on the bobbin under formation to be determined moment by moment; and which on the basis of previously recorded successive variations in the distance between two consecutive turns also determines when said distance falls below a predetermined minimum value, and when said distance again rises above said predetermined minimum value; and further which, before the distance between two consecutive yarn turns falls below the predetermined minimum value, activates a motive source which by means of a lever linkage progressively inclines the bobbin to vary its transmission ratio with the drive element, in order to maintain the distance between consecutive turns about a value slightly greater than the predetermined minimum value and to progressively increase the bobbin inclination each time the distance between said consecutive turns tends to fall, at least until the deposition of consecutive turns at a distance apart less than the predetermined minimum value ceases; and which also enables the initial conditions to be quickly restored by operating the motive source to incline the bobbin in the opposite direction to annul the previously induced inclination and cause
  • the apparatus used for the implementation of the method of the present invention comprises a control unit based on a mini-computer into which the values relating to the winding parameters, those ribbing orders considered damaging to the quality of the winding underway, and the predetermined minimum distance between two consecutive yarn turns in one complete to-and-fro deposition of the yarn on the surface of the forming bobbin are fed via a keyboard, said values being processed in the computing centre of the mini-computer for the computerised formation of a group of curves each having a constant "winding ratio" of whole number or exact fraction considered dangerous, the mini-computer then receiving electrical pulses generated at each revolution, or submultiple thereof, of the drive roller and bobbin carrier mandrel by known transducer probes applied to them, to unambiguously provide knowledge of the rotational values of said members at each moment, these latter values being compared with said operational winding parameters within the electronic comparator of the mini-computer, in order to generate a number of command signals in continuous succession to activate and control the motive source which angularly positions the bob
  • the apparatus of the present invention is provided in each yarn winding station.
  • the figures with index (a) are referred to a winding machine with a cylindrical drive roller, that produces conical bobbins
  • the figures with index (b) are referred to a winding machine with a cone drive element, that produces cylindrical bobbins
  • the figures without index are common to the above alternative cases.
  • cylindrical is intended to indicate a frusto-conical element having an inclination which is substantially small but it is sufficient to allow the rotational speed of the driven bobbin to be varied so as to vary the winding of wound yarn turns when the position of the line of contact between the bobbin and the drive element changes.
  • 9 is the drive roller (respectively cylindrical or conical) on the surface of which there rests with sufficient pressure the bobbin 1 being wound with spun yarn 12 unwound from the feed package 11.
  • the yarn 12 is compelled to undergo reciprocating rectilinear translation movement by a yarn guide element 29, of known type,, so that it becomes collected in turns 30 on the bobbin 1 (respectively conical or cylindrical) under formation, until this latter reaches the required package diameter
  • 27 is the bobbin carrier arm which supports the package 1 of wound yarn 12 as its diameter increases
  • 26 is a fork-shaped element which rocks angularly about the pin 25, which possesses a support 23, this latter being rigidly joined to the structure of the machine (not shown)
  • 10 is the belt, preferably toothed to provide positive transmission between the motive source 5, with support 21, and the shaft 32 on which the grooved drive roller 9 is rigidly keyed
  • 24 is a single lever which at one end is rigid with the pin 25 and at its other end comprises an elongate slot 34 operationally
  • Said pin 33 is subjected to angular movements by the frontal disc 35, this latter being driven angularly by the motive source 6, which is preferably in the form of a known stepping motor;
  • 4 is the sensor disc which measures moment by moment the rotational speed of the grooved drive element 9 during the entire formation cycle of the bobbin l;
  • 14 is the known yarn clearer provided for controlling the yarn under cross-winding;
  • 2 is the sensor disc which measures moment by moment the rotational speed of the mandrel 3 which clamps and locks the tube representing the support for the yarn 12 wound in the form of crossed helical turns 30;
  • 8 is a sensor the purpose of which is to sense the presence or absence of the fed yarn 12, which on unwinding is guided by a yarn guide ring 15;
  • 3 is the control unit, based on a mini-computer or electronic card, for storing the operator instructions introduced via the keyboard 7.
  • Said control unit 1 is able to convert said instructions arriving via the cable 16 into a program suitable for execution by its calculation and processing centre in order to provide, moment by moment, the signals required during the entire winding process.
  • the control unit 1 is substantially in the form of a microprocessor using as input the information obtained by the sensor discs 4 and 2 via the cables 19 and 22 and from the sensor 8 via the cable 18, and providing electrical pulses which are transmitted along the cable 30 to cause precise angular movements of the disc 35 via the motive source 6; 28 is the circumferential arc between two points of inversion of the turns of yarn 12 deposited along the side of the bobbin 1 on termination of two successive to-and-fro movements of the yarn 12 being wound; 38 is the line or rather the sufficiently narrow band on which the bobbin 1 is dragged into rotation by the grooved drive roller 9.
  • Kl, K2, K3, K4, K5 ... are those lines of whole-number or exact fraction winding ratio which overall represent the orders of ribbing considered dangerous for the quality of the winding underway in the formation of the bobbin l;
  • K is the winding ratio defined herein as the ratio of the number of revolutions of the grooved drive roller "Wc" to the number of revolutions of the bobbin under formation "Wr" per unit of time.
  • the operator firstly switches on the apparatus by which the bobbin will be guided to undergo formation with continuous crossed turns of yarn fed from the package 11.
  • the various requests for the operative yarn winding parameters then appear either together or progressively on the window screen of the keyboard 7.
  • the operator reads these requests and provides the following values:
  • the service operator activates the entire winding station and commences the winding process.
  • the motive source 5 rotates the grooved drive roller 9 up to its steady working speed, i.e. to the reference speed for collecting the yarn 12, which deposits on the tube with a constant crossing angle.
  • the yarn guide element 29 is also driven with reciprocating movement by a motive source, not shown.
  • the winding underway then follows the inclined line of Figure 21, said line representing the line 47 of Figure 20 in terms of the progressive winding points.
  • the control unit 3 processes the input data from the sensor discs 2 and 4 in its microprocessor or microprocessor card using its internal program, to calculate moment by moment the winding ratio "K", which represents the ratio of the rotational speed "Wc" of the grooved drive roller 9 to the rotational speed "Wr” of the bobbin 1.
  • the winding ratio "K” indicates a simple transmission ratio, and the terms “winding” and “transmission' can be used indifferently.
  • the "K” winding ratio values which gradually increase with the gradual increase in the bobbin diameter (bobbin diameter represented by the horizontal axis of Figure 21), are compared in the electronic comparator of the mini-computer 3 with the whole-number or exact fraction values representing overall those "K” ribbing orders considered dangerous (critical values) for the quality of the winding underway in the formation of the wound yarn bobbin 1.
  • the winding underway operates in a non-critical region and the bobbin 1 gradually grows with wound yarn 12, all as represented on the block diagram of Figure 22 by the ring positioned to the left, which closes downwards with the deviation block 49.
  • the diameter of the bobbin 1 increases along a portion of the line 47, said line 47 being characterised by a constant crossing (winding) angle.
  • the winding underway is also represented schematically in its geometrical characteristics by Figures 2, 3 and 4 and in its physical quantities by Figures 5, 6 and 7.
  • lever linkage 24 and 25 which angularly inclines the bobbin carrier arm is in its normal position, obliging the drag line 38 to assume a central position B (see Figures 3a and 3b), with a substantially constant contact pressure n(x) between the bobbin 1 and the roller 9 and with distribution of the drag force f(x) in accordance with Figure 6.
  • Said drag force f(x) results in a distribution of the drag moment m(x) as shown in Figure 7, which is easily understandable.
  • the winding ratio "K” varies by increasing with increasing diameter of the bobbin 1, at a certain moment the control unit 3 sensing that the ratio "K” equals the "K” value corresponding to the lower limit of the band zone straddling the first ribbing line K1.
  • the "K” value corresponding to said lower limit 42 geometrically corresponds to the predetermined minimum distance between two consecutive turns in the winding underway.
  • control unit 3 provides at its output electrical signals which via the cable 30 activate the motive source 6 to induce a progression of small angular rotations of the disc 35, to result in a controlled rotation of the bobbin carrier arm 27 via the pin 33 and lever 24.
  • the line of contact 38 shifts gradually towards the left end of the bobbin to achieve in the limit the geometrical configuration represented by Figures 8 and 9.
  • the rate of angular rotation Wr of the bobbin remains substantially constant during the continuous increase in the wound yarn diameter.
  • This shift action corresponds respectively, according the above mentioned alternative cases, to the shift of the drag line 38 towards the minor diameter of the conical bobbin, or to the shift of the drag line 38 towards the major diameter of the drive grooved cone.
  • the winding corresponding to the geometrical configuration of Figures 8, 9 and 10 is characterised by the variation in contact pressure n(x) shown in Figure 11, the variation in drag force f(x) shown in Figure 1 and the variation in drag moment m(x) shown in Figure 13. Said quantities are the resultant effects along the contact generator between the roller 9 and the overlying bobbin 1.
  • the controlled-growth winding reaches the point 44.
  • control unit 3 provides at its output electrical signals which via the cable 30 activate the motive source 6 to induce an instantaneous angular rotations of the disc 35, to achieve the geometrical configuration shown in Figure 14.
  • Said configuration causes the bobbin carrier arm 27 to incline the bobbin 1 towards the right end, hence shifting the line of contact 38 into the position of Figures 15.
  • the winding then passes rapidly from the operating point 44 to the operating point 46 along the substantially vertical line portion 43.
  • the winding resulting from the geometrical configuration of Figures 14, 15 and 16 is characterised by the variation in the contact pressure n(x) shown in Figure 17, by the variation in the drag force f(x) shown in Figure 18 and by the variation in the drag moment m(x) shown in Figure 19. Said quantities are the resultant effects along the contact generator between the drive roller 9 and the overlying bobbin 1 when the line of contact 38 is in proximity to the right end of the bobbin 1.
  • Controlled-growth winding therefore again commences in that the control unit 3 provides at its output electrical signals which via the cable 30 activate the motive source 6 to induce a progression of small angular rotations of the disc 35, to result in a controlled rotation of the bobbin carrier arm 27 via the pin 33 and lever 24.
  • the line of contact shifts gradually towards the centre of the bobbin 1 into the position of Figure 3.
  • the new operational winding point 48 is followed by winding under increasing "K" along the line 47 in accordance with the geometrical configuration of Figures 2 and 3.
  • control unit 3 operates with a cycle identical to the preceding described cycle, being again repeated identically in proximity to the various ribbing orders considered dangerous for the quality of the winding underway.
  • a method is proposed herein which is able to form wound yarn bobbins with their collected yarn turns perfectly distributed in the sense of being free of ribbing considered damaging for the subsequent processing in the production of a textile article.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Winding Filamentary Materials (AREA)
EP94201747A 1993-06-25 1994-06-18 Procédé et dispositif de distribution de fil enroulé sur une bobine au moyen d'un rouleau d'entraînement et un guide-fil Withdrawn EP0630845A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
IT001377A ITMI931377A1 (it) 1993-06-25 1993-06-25 Procedimento ed apparecchiatura per distribuire filo avvolto su bobina conica per mezzo del guidafilo e di un rullo cilindrico
ITMI931376 1993-06-25
ITMI931377 1993-06-25
IT93MI001376A IT1264892B1 (it) 1993-06-25 1993-06-25 Procedimento ed apparecchiatura per distribuire filo avvolto su bobina cilindrica per mezzo del guidafilo e di un cono di comando

Publications (1)

Publication Number Publication Date
EP0630845A1 true EP0630845A1 (fr) 1994-12-28

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Application Number Title Priority Date Filing Date
EP94201747A Withdrawn EP0630845A1 (fr) 1993-06-25 1994-06-18 Procédé et dispositif de distribution de fil enroulé sur une bobine au moyen d'un rouleau d'entraînement et un guide-fil

Country Status (1)

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EP (1) EP0630845A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104326290A (zh) * 2014-10-21 2015-02-04 无锡同心塑料制品有限公司 泡塑板卡带盘的卷盘驱动机构
CN104326289A (zh) * 2014-10-21 2015-02-04 无锡同心塑料制品有限公司 自动翻转的泡塑板卡带盘卷盘机构
CN113860068A (zh) * 2021-08-27 2021-12-31 安徽天威羊绒制品有限公司 一种并线机用收线装置
CN118270598A (zh) * 2024-06-03 2024-07-02 常州市新创智能科技有限公司 一种碳纤维原丝无捻收丝装置及控制方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB872608A (en) * 1957-12-24 1961-07-12 Mackie & Sons Ltd J Improvements in and relating to winding machines
DE2403341A1 (de) * 1974-01-24 1975-07-31 Schlafhorst & Co W Aufwickeleinrichtung fuer konische kreuzspulen
GB2127443A (en) * 1982-09-27 1984-04-11 Schweiter Ag Maschf Method and traverse winding frame for winding a thread on a bobbin
EP0272721A1 (fr) * 1986-12-01 1988-06-29 SAVIO S.p.A. Bras de support de bobine avec modulation de transmission de mouvement entre le cylindre et la bobine
EP0375043A1 (fr) * 1988-12-23 1990-06-27 SAVIO S.p.A. Procédé pour contrôler l'enroulage du fil dans un dispositif de bobinage de fils synthétiques

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB872608A (en) * 1957-12-24 1961-07-12 Mackie & Sons Ltd J Improvements in and relating to winding machines
DE2403341A1 (de) * 1974-01-24 1975-07-31 Schlafhorst & Co W Aufwickeleinrichtung fuer konische kreuzspulen
GB2127443A (en) * 1982-09-27 1984-04-11 Schweiter Ag Maschf Method and traverse winding frame for winding a thread on a bobbin
EP0272721A1 (fr) * 1986-12-01 1988-06-29 SAVIO S.p.A. Bras de support de bobine avec modulation de transmission de mouvement entre le cylindre et la bobine
IT1198214B (it) * 1986-12-01 1988-12-21 Savio Spa Braccio portaroche con modulazione della trasmissione del moto tra cilindro e rocca
EP0375043A1 (fr) * 1988-12-23 1990-06-27 SAVIO S.p.A. Procédé pour contrôler l'enroulage du fil dans un dispositif de bobinage de fils synthétiques

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104326290A (zh) * 2014-10-21 2015-02-04 无锡同心塑料制品有限公司 泡塑板卡带盘的卷盘驱动机构
CN104326289A (zh) * 2014-10-21 2015-02-04 无锡同心塑料制品有限公司 自动翻转的泡塑板卡带盘卷盘机构
CN113860068A (zh) * 2021-08-27 2021-12-31 安徽天威羊绒制品有限公司 一种并线机用收线装置
CN113860068B (zh) * 2021-08-27 2023-06-06 安徽天威羊绒制品有限公司 一种并线机用收线装置
CN118270598A (zh) * 2024-06-03 2024-07-02 常州市新创智能科技有限公司 一种碳纤维原丝无捻收丝装置及控制方法

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