EP0475475A1 - Vorrichtung zur Fadenspannungsverminderung in einer Spulvorrichtung - Google Patents

Vorrichtung zur Fadenspannungsverminderung in einer Spulvorrichtung Download PDF

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Publication number
EP0475475A1
EP0475475A1 EP91202032A EP91202032A EP0475475A1 EP 0475475 A1 EP0475475 A1 EP 0475475A1 EP 91202032 A EP91202032 A EP 91202032A EP 91202032 A EP91202032 A EP 91202032A EP 0475475 A1 EP0475475 A1 EP 0475475A1
Authority
EP
European Patent Office
Prior art keywords
thread
cop
unwinding
spooler
axis
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Withdrawn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
EP91202032A
Other languages
English (en)
French (fr)
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 EP0475475A1 publication Critical patent/EP0475475A1/de
Withdrawn legal-status Critical Current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
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/08—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to delivery of a measured length of material, completion of winding of a package, or filling of a receptacle
    • B65H63/082—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to delivery of a measured length of material, completion of winding of a package, or filling of a receptacle responsive to a predetermined size or diameter of 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
    • B65H2553/00—Sensing or detecting means
    • B65H2553/40—Sensing or detecting means using optical, e.g. photographic, elements
    • B65H2553/41—Photoelectric detectors
    • 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 reducing the value of 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 forming reel above.
  • 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 coming 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.
  • 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 resistance to 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 the end of the spinning cop during the unwinding phase, as is well known to the textile dressers.
  • 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 of an end side of the reel due to the pressure of the overhanging layer of thread. 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 unwound, as described in US Patent 4805846.
  • the device that reduces the value of the unwinding tension of the thread from the cop described in the present invention takes concrete form, in its practical application, by the fact that the supporting bracket of the movable element, which acts as an unwinding accelerator, can slide along an axis essentially parallel to the axis of the unwinding cop.
  • 1 is the movable element quandrangular in shape which acts as an unwinding accelerator and in addition has a side slit for introducing the thread at each replacement of the feed cop 3. Its position is essentially concentric and perpendicular to the axis of bobbin 23 and, therefore, to cop 3 of wound thread.
  • the said element 1 is placed with its bottom edge, at the start of rewinding thread 4 from cop 3 full of wound thread, at a distance from the tip of bobbin 23 essentially fluctuating at around 20mm (in accordance with the experimental results of the proposer);
  • 2 is a shaft fixed to support plate 21, the latter being fixed as a single body to the spooler frame (not illustrated);
  • 3 is the cop of wound thread made in a ring spinner;
  • 4 is the path, shown by a dotted and dashed line, of the thread which is unwound from cop 3 below and runs upwards to wind itself in crisscross coils around the forming reel 14;
  • 5 is a supporting frame which slides axially along shaft 2.
  • the said frame 5 supports in a fixed way and as a single body quadrangular element 1, so that during its downward movement, shown by arrow 7, element 1 also moves perfectly synchronized and to an identical extent; 8 is a pneumatic actuator which through rod 11 moves frame 5, and thus element 1, upwards or downwards; 9 is a photocell, or any photoelectronic element, capable of detecting the presence in front of the cone 24 of wound thread, when the latter moves into the bottom part of cop 3. As the said cone 24 gradually descends, as rewinding of thread 4 from cop 3 proceeds, it will at a certain moment be in front of photocell 8 (see Fig.
  • the support for the thread wound in the winding operation by a ring spinner to form a cop of yarn 3; 24 is the cone of wound thread and its truncated cone shape derives from the known method of winding the yarn onto bobbin 23 on the spindle of a ring spinner.
  • a cop 3 full of wound thread is placed on the cop-holder pin (not shown) in the feed position. Its thread 4, using known means and devices, is brought to wind itself onto the forming reel 14 and thus 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).
  • Photocell 9 does not detect in front the presence of the upper truncated cone shape of the wound thread 24 and 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 lowering of cone 24. This lowering will at a certain moment lead the truncated cone 24 to be positioned in front of photocell 9.

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Winding Filamentary Materials (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
EP91202032A 1990-08-29 1991-08-07 Vorrichtung zur Fadenspannungsverminderung in einer Spulvorrichtung Withdrawn EP0475475A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT02132390A IT1242991B (it) 1990-08-29 1990-08-29 Dispositivo attenuatore della tensione del filo in una unita' di roccatura
IT2132390 1990-08-29

Publications (1)

Publication Number Publication Date
EP0475475A1 true EP0475475A1 (de) 1992-03-18

Family

ID=11180111

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91202032A Withdrawn EP0475475A1 (de) 1990-08-29 1991-08-07 Vorrichtung zur Fadenspannungsverminderung in einer Spulvorrichtung

Country Status (2)

Country Link
EP (1) EP0475475A1 (de)
IT (1) IT1242991B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5377923A (en) * 1991-07-01 1995-01-03 Murata Kikai Kabushiki Kaisha Yarn unwinding assisting device and yarn unwinding method in an automatic winder
US5445334A (en) * 1992-01-30 1995-08-29 Murata Kikai Kabushiki Kaisha Cop changing mechanism for a winding unit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB839368A (en) * 1955-05-10 1960-06-29 Reiners Walter Method of unwinding thread and apparatus therefor
US3011736A (en) * 1958-11-08 1961-12-05 Reiners Walter Yarn-ballooning control sleeve for winding machines
JPS61178373A (ja) * 1985-01-31 1986-08-11 Murata Mach Ltd 糸解じよ補助装置
EP0225670A1 (de) * 1985-12-09 1987-06-16 Picanol N.V. Verfahren und Vorrichtung zum Abwickeln eines Fadens von einer Garnspule in Webmaschinen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB839368A (en) * 1955-05-10 1960-06-29 Reiners Walter Method of unwinding thread and apparatus therefor
US3011736A (en) * 1958-11-08 1961-12-05 Reiners Walter Yarn-ballooning control sleeve for winding machines
JPS61178373A (ja) * 1985-01-31 1986-08-11 Murata Mach Ltd 糸解じよ補助装置
EP0225670A1 (de) * 1985-12-09 1987-06-16 Picanol N.V. Verfahren und Vorrichtung zum Abwickeln eines Fadens von einer Garnspule in Webmaschinen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Vol. 10, No. 388 (M-549)[2445] 25 December 1986; & JP-A-61 178 373 (MURATA MACH LTD) 11 August 1986, the whole document. *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5377923A (en) * 1991-07-01 1995-01-03 Murata Kikai Kabushiki Kaisha Yarn unwinding assisting device and yarn unwinding method in an automatic winder
US5445334A (en) * 1992-01-30 1995-08-29 Murata Kikai Kabushiki Kaisha Cop changing mechanism for a winding unit

Also Published As

Publication number Publication date
IT1242991B (it) 1994-05-23
IT9021323A0 (it) 1990-08-29
IT9021323A1 (it) 1992-02-29

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