EP0475484A1 - Vorrichtung zur gleichmässigen Fadenspannung beim Abwickeln in einer Spulvorrichtung - Google Patents

Vorrichtung zur gleichmässigen Fadenspannung beim Abwickeln in einer Spulvorrichtung Download PDF

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Publication number
EP0475484A1
EP0475484A1 EP91202078A EP91202078A EP0475484A1 EP 0475484 A1 EP0475484 A1 EP 0475484A1 EP 91202078 A EP91202078 A EP 91202078A EP 91202078 A EP91202078 A EP 91202078A EP 0475484 A1 EP0475484 A1 EP 0475484A1
Authority
EP
European Patent Office
Prior art keywords
thread
cop
unwinding
tension
spooler
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Withdrawn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
EP91202078A
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 EP0475484A1 publication Critical patent/EP0475484A1/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Withdrawn legal-status Critical Current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 making the unwinding tension of the thread uniform 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 said cops are rewound onto reels on which the quantity of thread and shape are suitable for use in a subsequent operation and incidentally 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 in the unwinding stage,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 at one end side 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 has been 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 which is 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 that makes the value of the unwinding tension of the thread uniform in a spooler described in the present invention takes concrete form, in its practical application, as a supporting frame common both to the movable element, which acts as an unwinding accelerator, and to the step motor as well as to the photocell and the said support slides and is guided along a rack shaft and the said shaft is 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 supply 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).
  • the said shaft 2 is formed in such a way that, along a section of its straight side, it has teeth to form a rack element 20; 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, motor 8 and also sensor 9 so that during its downward movement, shown by arrow 7, the said elements 1, 8 and 9 also move perfectly synchronized and to an identical extent;
  • 8 is an electric step motor which activates and operates precise angular rotations of toothed pinion 18 which, by engaging with toothed rack 20, moves frame 5 and thus elements 1 and 9 up or down;
  • 9 is a photocell, or any photoelectric element, capable of detecting in front the presence of the cone 24 of wound thread on the top part of cop 3.
  • the said photocell 9, detecting such descent sends, through wire 19, electrical signals which, in electronic board 16, will be amplified and processed in order to output from the said board 16 electrical signals which, through wire 15, are capable of activating limited angular rotations of motor 8 and, thus, of toothed pinion 18.
  • the support for the thread wound by the winding operation in 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 thread onto bobbin 23 on the spindle of a ring spinner.
  • the operation of the device for making the value of the unwinding tension in a spooler uniform, illustrated by the attached drawings, can be easily understood by those working within the field.
  • a cop 3 full of wound thread is placed on the cop-holder pin (not shown) in the supply position. Its thread 4, using known means and devices, is brought to wind itself onto the forming reel 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).
  • Photocell 9 detects in front the presence of the upper truncated shape of wound thread 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 be detected by photocell 9 which, through electronic board 16, activates electric step motor 8.

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
EP91202078A 1990-08-29 1991-08-14 Vorrichtung zur gleichmässigen Fadenspannung beim Abwickeln in einer Spulvorrichtung Withdrawn EP0475484A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT02132990A IT1243707B (it) 1990-08-29 1990-08-29 Dispositivo uniformatore della tensione del filo in dipanatura in una unita' di roccatura
IT2132990 1990-08-29

Publications (1)

Publication Number Publication Date
EP0475484A1 true EP0475484A1 (de) 1992-03-18

Family

ID=11180194

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91202078A Withdrawn EP0475484A1 (de) 1990-08-29 1991-08-14 Vorrichtung zur gleichmässigen Fadenspannung beim Abwickeln in einer Spulvorrichtung

Country Status (2)

Country Link
EP (1) EP0475484A1 (de)
IT (1) IT1243707B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1005300A5 (fr) * 1991-07-01 1993-06-22 Murata Machinery Ltd Dispositif de devidage de fils assiste et procede de devidage de fils dans un devidoir automatique.
US5445334A (en) * 1992-01-30 1995-08-29 Murata Kikai Kabushiki Kaisha Cop changing mechanism for a winding unit
CN101891085A (zh) * 2010-08-05 2010-11-24 青岛宏大纺织机械有限责任公司 自动络筒机退绕张力的均匀控制方法及控制装置
CN103274261A (zh) * 2013-06-18 2013-09-04 海宁市盛祥线业有限公司 一种线筒分绕机中导线杆的伸缩机构

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 (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1005300A5 (fr) * 1991-07-01 1993-06-22 Murata Machinery Ltd Dispositif de devidage de fils assiste et procede de devidage de fils dans un devidoir automatique.
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
CN101891085A (zh) * 2010-08-05 2010-11-24 青岛宏大纺织机械有限责任公司 自动络筒机退绕张力的均匀控制方法及控制装置
CN101891085B (zh) * 2010-08-05 2013-01-16 青岛宏大纺织机械有限责任公司 自动络筒机退绕张力的均匀控制方法及控制装置
CN103274261A (zh) * 2013-06-18 2013-09-04 海宁市盛祥线业有限公司 一种线筒分绕机中导线杆的伸缩机构

Also Published As

Publication number Publication date
IT9021329A0 (it) 1990-08-29
IT1243707B (it) 1994-06-21
IT9021329A1 (it) 1992-02-29

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