EP0909736A2 - Dispositif de contrÔle de ballon et procédé pour le dévidage de fil d'une bobine d'alimentation dans une machine automatique de bobinage - Google Patents

Dispositif de contrÔle de ballon et procédé pour le dévidage de fil d'une bobine d'alimentation dans une machine automatique de bobinage Download PDF

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Publication number
EP0909736A2
EP0909736A2 EP98203320A EP98203320A EP0909736A2 EP 0909736 A2 EP0909736 A2 EP 0909736A2 EP 98203320 A EP98203320 A EP 98203320A EP 98203320 A EP98203320 A EP 98203320A EP 0909736 A2 EP0909736 A2 EP 0909736A2
Authority
EP
European Patent Office
Prior art keywords
balloon
tube
controlling
yarn
lever
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.)
Granted
Application number
EP98203320A
Other languages
German (de)
English (en)
Other versions
EP0909736A3 (fr
EP0909736B1 (fr
Inventor
Roberto Badiali
Sergio Zanini
Luigi Piva
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
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Publication date
Application filed by Savio Macchine Tessili SpA filed Critical Savio Macchine Tessili SpA
Publication of EP0909736A2 publication Critical patent/EP0909736A2/fr
Publication of EP0909736A3 publication Critical patent/EP0909736A3/fr
Application granted granted Critical
Publication of EP0909736B1 publication Critical patent/EP0909736B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B65H57/00—Guides for filamentary materials; Supports therefor
    • B65H57/22—Guides for filamentary materials; Supports therefor adapted to prevent excessive ballooning 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
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • This invention refers to a device and a process for unwinding the yarn from the feeding spools of spinning machines, in particular in automatic spoolers for controlling the so-called balloon.
  • Figure 1 indicates the unwinding spool from which the yarn 2 is picked up.
  • the yarn 2 passes through the yarn guiding elements 3, the yarn-presence sensor 4 and the yarn-stretcher 5, which generally consists of two small facing dishes squeezing the unwinding yarn between each other.
  • the path further includes a splicer 6, which receives the ends of the yarn to be spliced by aspirating nozzles, not shown for the sake of simplicity, whenever the yarn is interrupted by a rupture or by the action of the comb 7 set immediately downstream of the splicer.
  • the spooled yarn is collected in the reel 8, actuated to a rotating motion by the roller 9 and held by the reel supporting arm 10.
  • the driving action by the roller 9 occurs at a pre-established and substantially constant speed, as the dimension of the growing reel changes; it attracts the yarn 2, unwinding it at a high rotating speed from the spool 1 held firm on a positioning pin 11.
  • the invention is described here for exemplifying and non-limiting purposes with reference to its main application to the processing of spools in spoolers and specifically in a reeling phase, as the device and process according to this invention may find advantageous applications for a high-speed unwinding of the yarn from a spool even in some textile technology operations differing from those of a reeling operation.
  • the underlying spool 1 is set on a positioning pin 11 and rests on its base.
  • the overlying reel 8 recalls the yarn from the spool positioned in the underlying reeling unit, and the yarn is wound-up in spiraling fashion on its tube 12 to shape the spool unwinds from the same at a whirling speed in the order of 15,000 rpm. Under these conditions the unwinding yarn assumes, under the effect of the centrifugal force on the yarn itself, a curved trajectory and swells out toward the outside, thus forming the so-called "balloon" 13 around the spool itself and generating considerable centrifugal stresses which translate to strains which may even exceed the strength of the yarn and cause its rupturing. They further tend to deviate the spool 1 from its proper vertical position.
  • a certain margin of tolerance between the internal dimensions of the spooling tube 12 and the external dimensions of its positioning pin 11 is necessary to ensure the loading of the spool on the same by a free-falling action.
  • this positioning pin is set in the upper part of the transport dish.
  • the spool's positioning precision with respect to the reeling unit is also influenced by the further margin of tolerance of the positioning precision of the dish in the reeling unit during the unwinding process.
  • the balloon is controlled by a tubular element in the shape of an upside-down funnel which is gradually lowered, while keeping its conical portion positioned around the flared portion of the unwinding spool.
  • This invention therefore refers to a device and a controlling process for the balloon during the unwinding of the spool.
  • the scope of this invention is to achieve a simplified control of the balloon, without any of the drawbacks and complications of the similar devices known at the state of the art.
  • This invention achieves the control of the balloon by two organs contacted by the yarn in its unwinding motion.
  • One of them consists in a lever oscillating around a rotating pin. It is illustrated in the figures according to one of its preferred embodiments in the shape of an L, but could also perform its function in configurations equivalent or different from those shown in a simplified manner in Figure 2, for instance in the shape of a T or Y.
  • Figure 2A illustrates a side view of the reeling unit, which shows the unwinding spool where the yarn forms the winding 21 on the tube 12, and where the L-shaped lever 22 is hinged with its upper longitudinal arm on a pin 23 so as to rotate around an axis 24.
  • Figure 2B illustrates another side view, and the Figure 2C a ground view of the same.
  • the lower cross-arm 25 of the L-shaped lever constituted by a bar set across the tube is designed to contact the unwinding yarn and preferably built from a small metallic bar having a smooth and rounded cross-section.
  • the bar is at its end designed to face the tube 12 and to contact the yarn shaped in a broken line (25a, 25b, 25c, 25d) coherent with the curvature of the tube surface and designed to force the yarn of the balloon to approach the tube 12.
  • a second controlling organ for the balloon is set-up Just above the top of the tube 12. It consists in an annular or tubular element 27, within which the yarn of the rotating balloon is forced to pass while sliding over its surfaces and thus reducing its rotating speed.
  • it may be made of a ring or a metallic bar ringlet, as already known in the art to define the tip of the balloon.
  • the element 27 is built in a tubular shape and with a cross-section configured with radial changes, or by alternating sections of different curvature or concave and convex elements so as to thereby exert a high braking action in regard to the balloon's circulating motion.
  • this second element 27 is preferably placed at an axial distance s of 10-60 mm from the tip of the tube 12.
  • the Figures 3A, B illustrate a few forms of the transversal cross-section of the tubular element 27 according to the invention.
  • This second tubular element for controlling the balloon may be constructed with a continuous lateral wall, as illustrated in Figure 3A, or be equipped with a longitudinal slit 28 to insert the yarn, as shown in Figure 3B, depending on the process of starting-up and resuming the reeling operation adopted to build the spooling machine.
  • the first element with an L-shaped lever is equipped with a positioning device in relation to the lower arm 25 of the L-shaped lever with respect to the tip of the tube 12, a typical embodiment of which will be described below.
  • the lower part 25 of the L-shaped lever of the balloon controlling device is kept as close as possible but not in contact with the upper part of the tube 12, at a distance d of less than 10 mm and preferably between 1 and 2 mm, at the point of minimum distance between the tube 12 and the bar 25.
  • the bar 25 constituting the lower arm of the L-shaped lever is shown in a configuration following the broken line 25a, b, c, d, according to one of its preferred embodiments aimed at enhancing the contacting effect between the yarn and the bar 25.
  • This precision approach to the tube must be achieved independently of its more or less exact position and of the precision of its diameter, in a repetitive manner for all reeling stations and for each of them at every change of the spool, and even, according to a preferred embodiment, at each splicing cycle.
  • the possible shortage in the diameter of the tube and/or of the true positioning of the spool 1 with respect to its exact position may reach 2-3 mm and more; this change to a greater or lesser value is already highly significant for the purposes of controlling the balloon.
  • the L-shaped lever is rotated to a retracted position, so as not to interfere with these operations.
  • the L-shaped lever is rotated until it rests on the tube of the spool, in its upper part and preferably within 10-20 mm from its tip. After contacting the tube, it is therefore withdrawn by a very small, pre-established distance, which would preferably, as already described above, be within a range of 1-2 mm.
  • the contact with the tube independently of the precision of its diameter or position, allows establishing a precise reference point for this distance.
  • the yarn Downstream of the bar 25 of the L-shaped balloon-bursting lever the yarn encounters a second controlling organ of the balloon constituted by the annular or tubular element 31 which exerts both a second radial containment action of the balloon and a braking action on its rotating speed, which acts along the yarn on the spool and toward the tip of the tube.
  • the Figures 4 show a typical embodiment of the approaching and detaching device of the L-shaped lever in a direction to the tip of the tube.
  • the figures show the lower part 25 of the L-shaped lever in a rectilinear configuration. This device allows the sensing of the true position of the L-shaped balloon-bursting lever in an operating position during the unwinding process.
  • the device 30 is shown in a position ready for a spool change, with the L-shaped lever 22 in a retracted position with respect to the tube 12. It consists of an actuator and in the embodiment shown of an electromagnet 31, governed by the control cables 32, which retracts the cursor 33 to its interior when excited.
  • a transversal dish 34 is rigidly coupled to the bar of the cursor 33; it acts as a stop at one end of a compression spring 35 affixed to the body of the magnet, while the other end, whenever the magnet is not excited, extends and retracts the cursor 33 to its outermost position shown in Figure 4A.
  • the dish 34 is also connected with the traction spring 36 which hooks up with the other end to the lever 22, in its part opposite to the arm 25, so as to rotate around the axis 24 of the rotating pin 23.
  • An adjusting plate 37 is mounted around the same axis 24 and on the same pin 23. This plate is forced to rotate together with the lever 22, both by the presence of two pegs 40 and 41 constituting the end-stops of the relative rotation between the lever 22 and the plate 37, and by the pressure spring 43 resting on one side on the lever 22 and on the other side on a projection 42 of the plate 37.
  • Figure 4B shows the device 30 in a position to contact the tube of the spool, with the L-shaped lever 22 advanced to its utmost extent, so as to touch the tube 12 using the bar 25.
  • the actuating magnet 31 is excited; it retracts the cursor, compresses the spring 35, and by retrieving the cursor 33 tensions the spring 36 and pulls the lever 22 to the right, so as to rotate it in a clockwise direction.
  • the lever 22 rests on the peg 40 and also causes the plate 37 to rotate in a clockwise direction to the indicated position. The rotation in a clockwise direction stops when the arm 25 comes to rest on the tip of the tube 12.
  • This configuration attains a position in which it zeroes the distance between the tube 12 and arm 25, thus creating a true and useful reference point, despite the fact that the spool - or better said the tip of its tube - is in an imprecise position which does not fit its precise location.
  • Figure 4C shows the device 30 in a position to make contact with the tube of the spool, with the L-shaped lever 22 held in its most extended position, so as to touch the tube 12 while using the bar 25.
  • the zeroing position is fixed by blocking the adjusting plate 37 in a corner, thus preventing it, up to the next unblocking step, from rotating again around the pin 23.
  • This blockage occurs by using an actuator, and in the embodiment shown, by using an electromagnet 44 governed by the control cables 45, which if excited projects a cursor 45 to the outside which engages and blocks the plate 37 using its extremity 47.
  • Figure 4D shows the device 30 in an operating position ready for unwinding the yarn, while holding the arm 25 of the L-shaped lever retracted at a distance d from the tube 12.
  • the excitation of the actuating magnet 31 is discontinued, the spring 35 extends and projects the cursor 33 toward the lever 22, thereby pushing it so as to rotate in a counterclockwise direction.
  • This lever 22 compresses the spring 43, while rotating counterclockwise by an angle ⁇ up to the point of resting the lever 22 on the peg 41 in the indicated position.
  • the arm 25 finds itself at the distance d and cannot move further, because the actuator 44 blocks the plate 37 and its peg 41 prevents the L-shaped lever 22 from moving further.
  • adjusting the distance d corresponds to adjusting the rotating angle of the lever 22 between the pegs 40 and 41, or by their angular distance ⁇ with respect to the pin 23.
  • the approaching and detaching device of the L-shaped lever to the tip of the tube consists in an actuator 31 designed to axially move the cursor 33 between an extracted and retracted position, and to rotate the L-shaped lever in a counterclockwise and clockwise direction, respectively, around its pin 23, combined with an adjusting plate 37 which rotates with respect to the same pin 23 together with the L-shaped lever 22.
  • This adjusting plate 37 is further equipped with the blocking actuator 44, which acts in a zeroing position, and by the end-stops 40, 41 which allow the L-shaped lever 22 to rotate with respect to the plate 37 by the angle ⁇ , depending on the push of the actuator 31.
  • the plate 37 can be fitted with a row of perforations for the positioning of the pegs 40 and 41, at variable angular apertures with respect to the rotating axis 24 of the pin 23.
  • This embodiment is in a simplified manner described in Figure 4E, which refers to the plate 37 and shows the perforations 50 a-d and 51 a-d in which the pegs 40 and 41 can be respectively inserted, while gradually restricting the aperture angle ⁇ with respect to the axis 24, by advancing from the index a to the index d.
  • the distance d is correspondingly reduced by adjusting.
  • the oscillating lever 22 may be assigned - during the unwinding operation of the spool - to perform the further function of a so-called "curling prevention", according to the European patent no. 275.596 by the same Applicant.
  • the release of the lever 22 to touch the tip 12 of the tube can be obtained according to the configuration in Figure 4C, by holding the plate 37 blocked by the actuator 44 and activating the excitation of the magnetic actuator 31, which retracts the cursor 33.
  • This actuation is accompanied by a connection - for example through the control unit of the machine to the sensor 4, which triggers the excitation of the magnet 31, as soon as it no longer receives a signal sensing the presence of the yarn 2 moving in its interior.
  • the approaching of the bar 25 to the tube 12 within short periods of time allows blocking the ascending end of the yarn between the bar and the tube, thus preventing it from curling up and allowing it to be easily caught by the service nozzle while avoiding any needless waste of yarn during the re-splicing phase.
  • the balloon's controlling device need not follow the course of the unwinding from the spool by displacing it in an axial direction; once it is set in position, it does not require any axial shifting during the unwinding process but remains fixed, nor any monitoring of the level from which the yarn is unwinding.
  • the device according to the invention allows the machine to accept the processing of spools wound on tubes of various diameter, without the need to change any parts of the machine, as occurs on the contrary when using the devices of a known technology.
  • the approaching and positioning actuators of the balloon-bursting lever are of an on-off type and do not require any sensing instruments, as the device mechanically zeroes itself to create its own reference in the contact position.

Landscapes

  • Guides For Winding Or Rewinding, Or Guides For Filamentary Materials (AREA)
  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP19980203320 1997-10-15 1998-10-01 Dispositif de contrôle de ballon pour le dévidage de fil d'une bobine d'alimentation dans une machine automatique de bobinage Expired - Lifetime EP0909736B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI972330 1997-10-15
IT002330 IT1295336B1 (it) 1997-10-15 1997-10-15 Dispositivo e procedimento di controllo del balloon di svolgimento del filo dalla spola di alimentazione in una roccatrice automatica

Publications (3)

Publication Number Publication Date
EP0909736A2 true EP0909736A2 (fr) 1999-04-21
EP0909736A3 EP0909736A3 (fr) 2000-07-12
EP0909736B1 EP0909736B1 (fr) 2002-05-02

Family

ID=11378046

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980203320 Expired - Lifetime EP0909736B1 (fr) 1997-10-15 1998-10-01 Dispositif de contrôle de ballon pour le dévidage de fil d'une bobine d'alimentation dans une machine automatique de bobinage

Country Status (5)

Country Link
EP (1) EP0909736B1 (fr)
DE (1) DE69805146T2 (fr)
ES (1) ES2176902T3 (fr)
IT (1) IT1295336B1 (fr)
PT (1) PT909736E (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2093179A2 (fr) 2008-02-20 2009-08-26 SAVIO MACCHINE TESSILI S.p.A. Dispositif pour adapter un bobinoir à la longueur des bobines à devider
CN112723018A (zh) * 2021-01-14 2021-04-30 青岛宏大纺织机械有限责任公司 一种自清洁引纱装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202000024283A1 (it) 2020-10-15 2022-04-15 Savio Macch Tessili Spa Dispositivo antiriccio perfezionato per macchina roccatrice e relativo metodo per eliminare i ricci sul filo in una roccatrice

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63258371A (ja) * 1987-04-15 1988-10-25 Murata Mach Ltd 自動ワインダ−におけるバル−ンガイド
EP0478023A1 (fr) * 1990-08-29 1992-04-01 SAVIO S.p.A. Dispositif pour ajuster la tension du fil pendant son dévidage dans un bobinoir
WO1993024688A1 (fr) * 1992-05-26 1993-12-09 Palitex Project-Company Gmbh Procede et dispositif de commande de broches a retordre
JPH06127821A (ja) * 1992-10-12 1994-05-10 Murata Mach Ltd 解舒補助装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63258371A (ja) * 1987-04-15 1988-10-25 Murata Mach Ltd 自動ワインダ−におけるバル−ンガイド
EP0478023A1 (fr) * 1990-08-29 1992-04-01 SAVIO S.p.A. Dispositif pour ajuster la tension du fil pendant son dévidage dans un bobinoir
WO1993024688A1 (fr) * 1992-05-26 1993-12-09 Palitex Project-Company Gmbh Procede et dispositif de commande de broches a retordre
JPH06127821A (ja) * 1992-10-12 1994-05-10 Murata Mach Ltd 解舒補助装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 13, no. 52 (M-794), 7 February 1989 (1989-02-07) & JP 63 258371 A (MURATA MACH LTD), 25 October 1988 (1988-10-25) *
PATENT ABSTRACTS OF JAPAN vol. 18, no. 431 (M-1653), 11 August 1994 (1994-08-11) & JP 06 127821 A (MURATA MACH LTD), 10 May 1994 (1994-05-10) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2093179A2 (fr) 2008-02-20 2009-08-26 SAVIO MACCHINE TESSILI S.p.A. Dispositif pour adapter un bobinoir à la longueur des bobines à devider
CN112723018A (zh) * 2021-01-14 2021-04-30 青岛宏大纺织机械有限责任公司 一种自清洁引纱装置

Also Published As

Publication number Publication date
ES2176902T3 (es) 2002-12-01
DE69805146D1 (de) 2002-06-06
IT1295336B1 (it) 1999-05-04
PT909736E (pt) 2002-09-30
EP0909736A3 (fr) 2000-07-12
ITMI972330A1 (it) 1999-04-15
EP0909736B1 (fr) 2002-05-02
DE69805146T2 (de) 2002-12-12

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