EP0475483A1 - Device for adapting the tension of the thread as it unwinds in a spooler - Google Patents

Device for adapting the tension of the thread as it unwinds in a spooler Download PDF

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Publication number
EP0475483A1
EP0475483A1 EP91202077A EP91202077A EP0475483A1 EP 0475483 A1 EP0475483 A1 EP 0475483A1 EP 91202077 A EP91202077 A EP 91202077A EP 91202077 A EP91202077 A EP 91202077A EP 0475483 A1 EP0475483 A1 EP 0475483A1
Authority
EP
European Patent Office
Prior art keywords
thread
unwinding
cop
rings
tension
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Withdrawn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
EP91202077A
Other languages
German (de)
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 EP0475483A1 publication Critical patent/EP0475483A1/en
Withdrawn legal-status Critical Current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
    • 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
    • B65H63/086—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 completion of unwinding of a 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 adapting 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 and undergoes a subsequent unwinding 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. Consequently, they are rewound onto reels on which the quantity of thread and shape are suitable for use in a subsequent operation. 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 speed of such operations the length of thread transferred in one unit of time
  • ever greater tension values in the thread are created and, therefore, more frequent breakages occur, 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 phase,as is well known to the textile dressers. Indeed, when 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. In this case, 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 unwound, as described in US Patent 4805846.
  • the device described in the present invention capable of adapting to a nearly uniform value 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 forming reel above, the said device including:
  • the device for adapting the tension of the thread as it unwinds from a cop takes on concrete form in its practical application according to an additional embodiment which includes a multiplicity of rings, which act as unwinding accelerators, at least one of which is located above the top of the cop, the others concentrically surrounding the unwinding cop, the said rings occupying a fixed axial position during the entire unwinding operation, whereas they rotate angularly to open at the moment when a new supply cop is mounted and rotate back angularly to close concentrically around the cop, which begins the unwinding phase.
  • a multiplicity of rings which act as unwinding accelerators, at least one of which is located above the top of the cop, the others concentrically surrounding the unwinding cop, the said rings occupying a fixed axial position during the entire unwinding operation, whereas they rotate angularly to open at the moment when a new supply cop is mounted and rotate back angularly to close concentrically around the cop, which begins the unwinding phase.
  • One of the three rings is located above the tip of the bobbin and its position is such that the distance from the top edge of the bobbin fluctuates around 20mm (in accordance with the experimental results of the proposer);
  • the said semi-circular elements 25 are anchored rigidly to inner tubular element 6, which has a toothed band 30 at the top which engages with the teeth located on the inner side of fork 5;
  • 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 fork element fixed rigidly as a single body to the end of rod 11 of actuator 8.
  • the said fork element has along its inner sides, opposite each other, teeth 28, which function in a similar way to a rack by engaging with teeth 29 and 30 of the two tubular elements 2 and 6 located concentrically one inside the other;
  • 8 is a pneumatic actuator which, by means of rod 11, moves fork 5 forwards in the direction of arrow 7.
  • Fork 5 with the teeth 28 on its inner sides will rotate tubular elements 2 and 6, engaging with their teeth 28 and 30, in the direction of rotational arrows 7.
  • the said rotational arrows oppose each other, i.e.
  • tubular element 2 will rotate angularly in a clockwise direction and thus semi-circular elements 1 fixed rigidly to it will rotate in a clockwise direction, whilst inner tubular element 6 will rotate in an anti-clockwise direction in perfect synchronism and thus semi-circular elements 25 fixed rigidly to it will rotate in an anti-clockwise direction.
  • the said anti-clockwise rotation of elements 25 is made possible by the presence of circumferential openings made in outer tubular element 2.
  • the said opposite angular rotations enable the rings which act as unwinding accelerators to be opened;
  • a photocell or any photoelectronic element, capable of detecting the moment when unwinding of the thread from the supply cop ends.
  • the said photocell 9 is fixed near the bottom end of cop 3 on a supporting plate 22.
  • the said flat element 21 supports tubular elements 2 and 6 but allows them to rotate round each other; 12 is the supply cylinder which rotates reel 14 and, imparting an alternating back-and-forth movement, guides the thread onto the said reel 14; 10 is the schematic side outline of the structure of a spooler; 14 is the reel which is a package of thread with a truncated cone shape, or a cylindrical shape, and the said package is produced by a single spooler and intended for subsequent working stages (dyeing, warping, weaving, etc.).
  • the operation of the device for adapting the unwinding tension of the thread in a spooler 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.
  • the rings which act as unwinding accelerators have their semi-circular elements 1 and 25 open (see Fig. 3).
  • Photocell 9 the moment it detects the presence of wound thread on cop 3, the latter being fitted and positioned at the front on the cop-holder post, will generate an electrical signal which, through wire 19, will activate solenoid valve 18 which in turn will operate distributor 16 to direct the flow of compressed air from pipe 20 to pipe 15 so that actuator 8 pulls back rod 11 (in the opposite direction to the direction of arrow 7) and thus fork 5 rigidly connected to it.
  • the device covered by the present invention is positioned as shown in Fig. 2.
  • Thread 4 drawn upwards by supplier cylinder 12, on unwinding from cop 3, causes a gradual and continuous lowering of the wound thread. This lowering will continue until the moment when all the wound thread is collected and wound onto reel 14.
  • photocell 9, detecting that no wound thread is present will generate an electrical signal which, through wire 19, will activate solenoid valve 18, which will operate distributor 16 to direct the flow of compressed air from pipe 20 to pipe 15 so that actuator 8 will push rod 11, and thus fork 5, forward and the latter will move in the direction of arrow 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • External Artificial Organs (AREA)
EP91202077A 1990-08-29 1991-08-14 Device for adapting the tension of the thread as it unwinds in a spooler Withdrawn EP0475483A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT02132590A IT1242993B (it) 1990-08-29 1990-08-29 Dispositivo adattatore della tensione del filo in dipanatura in una unita' di roccatura
IT2132590 1990-08-29

Publications (1)

Publication Number Publication Date
EP0475483A1 true EP0475483A1 (en) 1992-03-18

Family

ID=11180140

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91202077A Withdrawn EP0475483A1 (en) 1990-08-29 1991-08-14 Device for adapting the tension of the thread as it unwinds in a spooler

Country Status (2)

Country Link
EP (1) EP0475483A1 (it)
IT (1) IT1242993B (it)

Cited By (5)

* 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.
CN112960477A (zh) * 2021-02-03 2021-06-15 浙江理工大学 一种实时检测和动态调节张力的绕线成型控制方法
DE102021118843A1 (de) 2021-07-21 2023-01-26 Maschinenfabrik Rieter Ag Verfahren zum Betreiben einer Arbeitsstelle einer Spulmaschine sowie Spulmaschine
DE102021118845A1 (de) 2021-07-21 2023-01-26 Maschinenfabrik Rieter Ag Arbeitsstelle einer Spulmaschine sowie Verfahren zum Umspulen eines Garns
DE102022107378A1 (de) 2022-03-29 2023-10-05 Rieter Automatic Winder GmbH Arbeitsstelle einer einen Faden von Spinnkopsen auf Kreuzspulen umspulenden Spulmaschine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH316367A (de) * 1953-10-06 1956-10-15 Inventa Ag Verfahren zur Verminderung von Schwankungen der Fadenspannung beim Abzug eines Fadens von einer rotierenden Spindel
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
FR2383112A1 (fr) * 1977-03-10 1978-10-06 Dornier Gmbh Lindauer Dispositif de tension du fil pour machine a tisser
JPS61178373A (ja) * 1985-01-31 1986-08-11 Murata Mach Ltd 糸解じよ補助装置
EP0225670A1 (en) * 1985-12-09 1987-06-16 Picanol N.V. Process for unwinding a thread from a reel in looms, and arrangement used therefor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH316367A (de) * 1953-10-06 1956-10-15 Inventa Ag Verfahren zur Verminderung von Schwankungen der Fadenspannung beim Abzug eines Fadens von einer rotierenden Spindel
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
FR2383112A1 (fr) * 1977-03-10 1978-10-06 Dornier Gmbh Lindauer Dispositif de tension du fil pour machine a tisser
JPS61178373A (ja) * 1985-01-31 1986-08-11 Murata Mach Ltd 糸解じよ補助装置
EP0225670A1 (en) * 1985-12-09 1987-06-16 Picanol N.V. Process for unwinding a thread from a reel in looms, and arrangement used therefor

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 (5)

* 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.
CN112960477A (zh) * 2021-02-03 2021-06-15 浙江理工大学 一种实时检测和动态调节张力的绕线成型控制方法
DE102021118843A1 (de) 2021-07-21 2023-01-26 Maschinenfabrik Rieter Ag Verfahren zum Betreiben einer Arbeitsstelle einer Spulmaschine sowie Spulmaschine
DE102021118845A1 (de) 2021-07-21 2023-01-26 Maschinenfabrik Rieter Ag Arbeitsstelle einer Spulmaschine sowie Verfahren zum Umspulen eines Garns
DE102022107378A1 (de) 2022-03-29 2023-10-05 Rieter Automatic Winder GmbH Arbeitsstelle einer einen Faden von Spinnkopsen auf Kreuzspulen umspulenden Spulmaschine

Also Published As

Publication number Publication date
IT1242993B (it) 1994-05-23
IT9021325A1 (it) 1992-02-29
IT9021325A0 (it) 1990-08-29

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