EP0478023A1 - Dispositif pour ajuster la tension du fil pendant son dévidage dans un bobinoir - Google Patents

Dispositif pour ajuster la tension du fil pendant son dévidage dans un bobinoir Download PDF

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Publication number
EP0478023A1
EP0478023A1 EP91202060A EP91202060A EP0478023A1 EP 0478023 A1 EP0478023 A1 EP 0478023A1 EP 91202060 A EP91202060 A EP 91202060A EP 91202060 A EP91202060 A EP 91202060A EP 0478023 A1 EP0478023 A1 EP 0478023A1
Authority
EP
European Patent Office
Prior art keywords
thread
tension
cop
spooler
unwinding
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Withdrawn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
EP91202060A
Other languages
German (de)
English (en)
Inventor
Roberto Badiali
Amedeo Quaia
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 SpA
Savio Macchine Tessili SpA
Original Assignee
Savio SpA
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
Application filed by Savio SpA, Savio Macchine Tessili SpA filed Critical Savio SpA
Publication of EP0478023A1 publication Critical patent/EP0478023A1/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Withdrawn legal-status Critical Current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
    • 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
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/02—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating delivery of material from supply package
    • B65H59/06—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating delivery of material from supply package by devices acting on material leaving the package
    • 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 present invention relates to a device for adjusting the unwinding tension of the thread in a spooler, which is designed to wind thread at high speed unwinding it from a cop below and collecting it on a reel above being formed.
  • Some textile working stages involve firstly transferring the thread, at the maximum speed possible, from one package to another.
  • a thread produced in a spinning machine particularly in a continuous ring frame, is normally wound onto a spool or reel.
  • the thread is then transported and supplied as a spinning cop for a rewinding stage.
  • Spooling involves transferring (rewinding) from the starting cop to the collecting reel, with unravel unwinding, i.e. with axial extraction of the thread from the stationary cop.
  • the starting package is often a cop from a ring spinner. Due to the mechanical limitations of a continuous ring frame, the spinning cops have a relatively small quantity of thread, up to a few hundred grams at most. Consequently, they are rewound and wound onto reels on which the quantity of thread and shape are suitable for use in a subsequent operation and the thread from several cops is collected in succession on a single reel. The purpose is always to obtain packages which are more suitable for the subsequent working stages such are dyeing, warping, inserting the weft, etc.
  • the thread may be improved by removing sections with defects of various types.
  • the continuous increase in the speed of such operations (expressed by the length of thread transferred in one unit of time) to reduce production costs, ever greater tension values in the thread are created and, therefore, more frequent breakages, which cause a considerable fall in the operating performance of the spooler and its productivity.
  • breakage of the thread occurs under a tension which is greater than the thread's tensile stress.
  • the thread on each spinning cop which has been supplied at a set position of a spooler, is drawn upwards with a tension value which gradually increases between the beginning and end of the spinning cop being unwound, as is well known to the textile dressers.
  • the layer of thread on each spinning cop decreases as the winding operation of the spooler progresses, the layer of thread thus diminished twists only round the bottom end of the cop and the thread, drawn out of it, travels upwards twisting back round the surface of the cop.
  • the angle of separation of the layer of thread decreases and therefore tension is applied to the travelling thread due to the friction between the lengths of thread, or the contact of the thread with the cop and this may lead to breakage of the thread. This phenomenon occurs more readily in spoolers with a high winding speed. In the more modern spoolers thread transfer speeds of 20-30 m/s are reached.
  • the thread is wound onto the reel at a low tension and thus the layer of thread wound at low tension may be expanded outwards at one end of the reel due to the pressure of the layer of thread on top of it. Since usually to obtain one reel several spinning cops are used, the expanded part appears within each set period thus causing the formation of a reel with faulty winding which may give rise to unacceptable production for subsequent working stages.
  • Means of controlling the spooling speed i.e. the winding speed, have also been proposed as a countermeasure to keep the thread tension at practically constant levels from the beginning to the end of the cop from which the thread is being unwound, as described in US Patent 4805846.
  • the aim of the present invention is to resolve the above-mentioned problems of the known state of the art by providing a device which ensures that the tension of the thread being supplied in the spooler is kept at an essentially constant value during unwinding of the entire spinning cop and which offers the following advantages:
  • the device described in the present invention capable of making uniform and regular the value of the unwinding tension in a spooler, which is designed to wind thread at high speed unwinding it from a cop below that supplies thread to the reel above being formed, the said device including:
  • the device that adjusts the unwinding tension in a spooler described in the present invention takes concrete form, in its practical application, by the fact that the element that acts as an unwinding accelerator by containing and limiting centrifugation of the thread is essentially quadrangular in shape and has a side slit for introduction of the thread which occurs each time the supply cop is replaced.
  • the device that adjusts the tension of the thread as it unwinds in a spooler described in the present invention also takes concrete form, in its practical application, by the fact that the kinematic mechanism for moving the said movable element along the axis of the cop is a rack which engages with a toothed pinion which is rotated by an electric step motor, the latter being activated so as to ensure that the tension of the thread as it is transferred from the cop to the reel falls within a range of values permitted by the unwinding operation in progress.
  • the device that adjusts the tension of the thread as it unwinds in a spooler described in the present invention takes concrete form, moreover, in its practical application, by the fact that the tension sensor that measures the tension value of the thread as it travels from the cop to the reel is a piezoelectric element, or any other known element, which transmits electric signals to a control device which compares the said signals with reference values that fall within a permitted range of values.
  • the said control device in turn outputs electrical signals which activate and operate the electrical step motor whenever the electrical signals emitted by the tension sensor differ from the reference values in the range of permitted values.
  • the device for adjusting the thread as it unwinds in a spooler described in the present invention takes concrete form, moreover, in its practical application by the fact that the supporting frame common both to the movable element, which acts as an unwinding accelerator, and also to the electric step motor, can slide along a rack shaft and the said shaft is essentially parallel to the axis of the cop being unwound.
  • a cop 3 full of wound thread is placed on the cop-holder post (not shown) in the supply position. Its thread 4, using known means and devices, is brought to wind itself onto the reel being formed 14 and rewinding of the thread begins, i.e. the transfer of thread 4 from cop 3 below to reel 14 above.
  • the device covered by the present invention is stationary in the upper limit position (see Fig. 2).
  • Sensor 9 measures the tension of the thread travelling from the cop to the reel and at the start of unwinding quadrangular element 1 is positioned at a precise distance from the tip of bobbin 23. Thread 4, drawn upwards by supplier cylinder 12, on unwinding from cop 3, causes a gradual and continuous increase in thread tension particularly in the end part of unwinding (see Fig. 3). This increase in tension is detected by photocell sensor 9 which, through electronic board 16, activates electric step motor 8.

Landscapes

  • Knitting Machines (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Basic Packing Technique (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
EP91202060A 1990-08-29 1991-08-13 Dispositif pour ajuster la tension du fil pendant son dévidage dans un bobinoir Withdrawn EP0478023A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT02132890A IT1242995B (it) 1990-08-29 1990-08-29 Dispositivo regolabile della tensione del filo in dipanatura in una unita' di roccatura
IT2132890 1990-08-29

Publications (1)

Publication Number Publication Date
EP0478023A1 true EP0478023A1 (fr) 1992-04-01

Family

ID=11180176

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91202060A Withdrawn EP0478023A1 (fr) 1990-08-29 1991-08-13 Dispositif pour ajuster la tension du fil pendant son dévidage dans un bobinoir

Country Status (2)

Country Link
EP (1) EP0478023A1 (fr)
IT (1) IT1242995B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0909736A2 (fr) * 1997-10-15 1999-04-21 SAVIO MACCHINE TESSILI S.p.A. Dispositif de contrÔle de ballon et procédé pour le dévidage de fil d'une bobine d'alimentation dans une machine automatique de bobinage
WO2011125046A2 (fr) * 2010-04-09 2011-10-13 Schlumberger Canada Limited Ensemble, système et procédé pour mesure de tension de câble
EP4122858A1 (fr) * 2021-07-21 2023-01-25 Maschinenfabrik Rieter AG Procédé permettant de faire fonctionner un poste de travail d'une machine à bobiner, ainsi que machine à bobiner

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH351202A (de) * 1955-05-10 1960-12-31 Reiners Walter Ing Dr Verfahren und Vorrichtung zum Abziehen eines Textilfadens von einem Wickel über Kopf über ein Fadenführerglied unter Beeinflussen der Fadenspannung
US2994491A (en) * 1956-05-14 1961-08-01 Schlafhorst & Co W Means for unwinding the yarn of conical-layer coils
CH397490A (de) * 1962-07-03 1965-08-15 Mmw Zwirnmaschinen Ag Einrichtung zum Beeinflussen des Fadenballons an Zwirnmaschinen
USB506167I5 (fr) * 1974-09-16 1976-02-10
EP0225670A1 (fr) * 1985-12-09 1987-06-16 Picanol N.V. Procédé et dispositif pour dérouler un fil d'une bobine dans les métiers à tisser

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH351202A (de) * 1955-05-10 1960-12-31 Reiners Walter Ing Dr Verfahren und Vorrichtung zum Abziehen eines Textilfadens von einem Wickel über Kopf über ein Fadenführerglied unter Beeinflussen der Fadenspannung
US2994491A (en) * 1956-05-14 1961-08-01 Schlafhorst & Co W Means for unwinding the yarn of conical-layer coils
CH397490A (de) * 1962-07-03 1965-08-15 Mmw Zwirnmaschinen Ag Einrichtung zum Beeinflussen des Fadenballons an Zwirnmaschinen
USB506167I5 (fr) * 1974-09-16 1976-02-10
EP0225670A1 (fr) * 1985-12-09 1987-06-16 Picanol N.V. Procédé et dispositif pour dérouler un fil d'une bobine dans les métiers à tisser

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 10, no. 388 (M-549)[2445], 25th December 1986; & JP-A-61 178 373 (MURATA MACH. LTD) 11-08-1986 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0909736A2 (fr) * 1997-10-15 1999-04-21 SAVIO MACCHINE TESSILI S.p.A. Dispositif de contrÔle de ballon et procédé pour le dévidage de fil d'une bobine d'alimentation dans une machine automatique de bobinage
EP0909736A3 (fr) * 1997-10-15 2000-07-12 SAVIO MACCHINE TESSILI S.p.A. Dispositif de contrôle de ballon et procédé pour le dévidage de fil d'une bobine d'alimentation dans une machine automatique de bobinage
WO2011125046A2 (fr) * 2010-04-09 2011-10-13 Schlumberger Canada Limited Ensemble, système et procédé pour mesure de tension de câble
WO2011125046A3 (fr) * 2010-04-09 2012-02-23 Schlumberger Canada Limited Ensemble, système et procédé pour mesure de tension de câble
US9389130B2 (en) 2010-04-09 2016-07-12 Schlumberger Technology Corporation Assembly, system and method for cable tension measurement
EP4122858A1 (fr) * 2021-07-21 2023-01-25 Maschinenfabrik Rieter AG Procédé permettant de faire fonctionner un poste de travail d'une machine à bobiner, ainsi que machine à bobiner

Also Published As

Publication number Publication date
IT1242995B (it) 1994-05-23
IT9021328A1 (it) 1992-02-29
IT9021328A0 (it) 1990-08-29

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