EP0020652A1 - Procede pour enlever un fil roule autour d'un tampon et pour enrouler le fil en une bobine, et appareil d'application de ce procede - Google Patents

Procede pour enlever un fil roule autour d'un tampon et pour enrouler le fil en une bobine, et appareil d'application de ce procede

Info

Publication number
EP0020652A1
EP0020652A1 EP79901654A EP79901654A EP0020652A1 EP 0020652 A1 EP0020652 A1 EP 0020652A1 EP 79901654 A EP79901654 A EP 79901654A EP 79901654 A EP79901654 A EP 79901654A EP 0020652 A1 EP0020652 A1 EP 0020652A1
Authority
EP
European Patent Office
Prior art keywords
yarn
buffer
winding
speed
winding roll
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Withdrawn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
EP79901654A
Other languages
German (de)
English (en)
Inventor
Jan Nijhuis
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.)
Thales Nederland BV
Original Assignee
Thales Nederland BV
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 Thales Nederland BV filed Critical Thales Nederland BV
Publication of EP0020652A1 publication Critical patent/EP0020652A1/fr
Withdrawn legal-status Critical Current

Links

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
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/38—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension
    • 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
    • B65H59/38—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension
    • B65H59/382—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension using mechanical means
    • 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 invention relates to a method for removing a yarn wrapped around a buffer and for winding the yarn into a package, and an apparatus for applying this method.
  • the present invention has for its object to provide a method as set forth in the opening paragraph, whereby the yarn tension is kept constant.
  • the method as described above is characterised in that the transverse displacement, which is developed to compensate for tension variations and which is imparted to the yarn through being removed from the buffer in a continuously changing position due to differences in the speed at which the yarn is removed from the buffer with respect to the speed at which it is fed to the buffer, is converted into a control signal by a sensing unit, which control signal is applied to a regulating means to vary the winding speed of the yarn in such a way that said continuously changing position is kept within fixed limits. That is, tension variations in the yarn are compensated by the buffer, while the amount of yarn around the buffer is kept within fixed limits through the speed regulation performed.
  • the invention is therefore directed to speed regulation performed under constant tension and not to tension regulation.
  • Fig. 1 is a block diagram of the speed regulation circuit according to the invention.
  • Fig. 2 illustrates an embodiment of the apparatus, in which the method according to the invention may be applied.
  • the input quantity of the speed regulation circuit in Fig. 1 is the speed V i at which a yarn is applied to a buffer and the output quantity of this circuit is the speed V u at which this yarn is removed from the buffer. If these speeds are not constantly adapted to each other, tension variations will occur in the yarn; these variations may give rise to yarn breakage unless they can be compensated for. This compensation is accomplished here by means of a yarn buffer 101. As soon as the speed at which the yarn is removed from buffer 101 is greater than that at which it is applied to this buffer, the amount of yarn on the buffer is reduced, while in the reverse case the amount of yarn around the buffer is increased.
  • the amount of yarn around the buffer should therefore be kept within certain limits; with a substantially constant yarn feed rate, this can be achieved by keeping the transverse displacement imparted to the yarn within fixed limits.
  • a sensing unit 102 converts the transverse displacement of the yarn into a control signal ⁇ U, applied to a regulating means 105 to vary the speed at which the yarn is removed in such a way that the subsequent change in ⁇ V keeps the transverse displacement within fixed limits.
  • the above speed regulation performed under constant. yarn tension may be applied continuously or discretely.
  • the magnitude of the control signal ⁇ U will be determined by the magnitude of the transverse displacement of the yarn, while this control signal will act on the regulating means 103 to adapt the rate of removal V u to the feed rate V i . If the rate of feeding the yarn to the buffer is constant, the rate of removal will have been fully adapted to this constant feed rate after a short settling period, were it not for the fact that variations in tension, compensated by transverse displacements of the yarn, occur constantly, the cause of which variations being, apart from yarn shrinkage, the winding system employed. With a continuous regulation therefore, the rate of removal will constantly be varied even after the settling period.
  • the sensing unit 102 responds to two positions assumed by the yarn during its transverse displacement.
  • the control signal supplied by unit 102 determines the instances at which the yarn assumes the two positions and acts on the regulating means 103 to control the rate of removal between two values.
  • the rate of removal may be varied at random in a given range, whereas with a discrete regulation this rate can assume only two values, while at the most the frequency at which the rate of removal is changed between these two values is subject to change.
  • the rate of removal assumes its maximum value, and if in its subsequent transverse displacement it reaches the position in which a minimum amount of yarn is wrapped around the buffer, this rate assumes its minimum value.
  • the rate of removal is identical to the winding speed, since the yarn is removed by the yarn winding means.
  • the winding may be accomplished in two ways, viz. through winding the yarn directly on a motor-driven spool and through employing a motor-driven winding roll which in turn drives the spool, whereby the yarn is passed over the winding roll or through the grooves in the winding roll to wind it onto the spool.
  • the winding speed of the yarn is determined by the rotational speed of the spool, and in the second case by the peripheral speed of the winding roll.
  • the influence of the thickness of the yarn package on the spool asserts itself particularly in the first case.
  • the design of the yarn buffer 101 may be identical to that used with a discrete regulation; this will be described with reference to Fig. 2.
  • the sensing unit 102 should however be of a different design for a continuous and a discrete regulation.
  • the magnitude of the transverse displacement may be converted in the sensing unit into a corresponding control signal, for example by having this displacement to effect a change in a dielectric, the magnitude of which change being determined by measuring the capacity.
  • the monitoring of the instances at which the yarn assumes the two fixed positions during its transverse displacement may be realised by recording interruptions in two small light beams; another method will be described with reference to Fig. 2.
  • With continuous regulation a motor driven by the control signal is simply used for the regulating means 103; with a discrete regulation, see the description with reference to Fig. 2.
  • Fig. 2 illustrates an embodiment of an apparatus for the application of the method according to the invention.
  • the yarn buffer here employed consists of a rotating cylinder 204 with a shaft 205, whose axis makes a small angle with that of the cylinder 204 in order to keep the yarn windings around the whole of the cylinder and the shaft separate.
  • the combination of cylinder 204 and shaft 205 is hereinafter denoted by buffer 204,205 for the sake of simplicity.
  • a yarn 207 is passed through an opening in the shield 206 which is fitted around buffer 204,205. After wrapping a few turns of yarn around the buffer, yarn 207 is removed from the buffer and is wound onto spool 209 via winding roll 208. The rate at which the yarn is wound onto the spool is determined by the peripheral speed of winding roll 208.
  • the sensing unit consists of a reciprocating mechanism 211 movable between two positions.
  • the reciprocating mechanism removes the yarn from a point on the buffer, which point changes continuously between two points corresponding with the above two positions.
  • An increase of the tension in the yarn 207 passed from buffer 204,205 to the winding roll 208 is compensated through the yarn loosing its contact with buffer 204,205 sooner and experiencing a corresponding transverse displacement.
  • the reciprocating mechanism 211 moves to the position denoted by A.
  • the rotational speed of winding roll 208 will be slightly decreased as will be shown after. The result thereof is a reduction in the tension in yarn 207 passed to winding roll 208.
  • ring 212 mounted to buffer 204,205 should preferably contain a hairy yarn guide 213 provided fully around ring 212. With this provision it is possible to remove the yarn from buffer 204,205 in all positions under the required constant tension.
  • the regulating means further comprises a transmission mechanism, consisting of a relay circuit 214, a pneumatic control mechanism 215, a driving pulley 216 and a pulley 217 driven by pulley 216 and coupled to winding roll 208.
  • the relay circuit 214 is coupled to the reciprocating mechanism 211, and each time this mechanism reaches either position A or position B the relay circuit delivers a signal representative of this position, which signal is applied to the pneumatic control mechanism 215.
  • control mechanism 215 comprises a solenoid valve 218, a piston 219 with piston rod 220 and a pulley system 221.
  • Pulley system 221 is connected with a rod 222 to driving pulley 216 and is capable of performing a reciprocating motion about the axis of pulley 216.
  • the pulley 216 drives pulley system 221 through a belt 223, the pulley system in turn drives, via a belt 224, pulley 217 coupled to winding roll 208.
  • pulley 217 is provided with a belt groove with a variable depth. If the distance between pulley system
  • piston rod 220 the distance between pulley system 221 and pulley 217 is slightly increased, thereby slightly raising the rotational speed of winding roll 208.
  • reciprocating mechanism 211 then reachesposition A, the air supply via solenoid valve 218 is shut off, and the motion of piston rod 220 slightly decreases the distance between pulley system 221 and pulley 217, thereby slightly lowering the rotational speed of winding roll 208.
  • the positional interval in which the yarn looses its contact with buffer 204,205 is adjustable.
  • This is realised with an eccentric bearing-mounted shaft 225, whose position is adjustable by hand.
  • Winding roll 208 is rotatably attached to this shaft.
  • a displacement of eccentric shaft 225 results in a positional change of the pulley system 221 with respect to the winding roll 208 and hence imparts a change in the transmission ratio.
  • the values between which the rotational speed of winding roll 208 is varied can therefore be shifted slightly to both sides; this is also accompanied with a shift in the positional interval in which the yarn is removed from buffer 204, 205, for example to two positions symmetrical with respect to the normal.
  • the apparatus thereto comprises a counter 226, a second pneumatic control mechanism 227 and a lever mechanism 228.
  • the pneumatic control mechanism 227 consists of the solenoid valve 229, a piston 230 with piston rod 231.
  • the number of turns of yarn to be applied around buffer 204,205 corresponds with a certain winding time, selected with counter 226. During the winding time this counter actuates the solenoid valve 229 to force air into the cylinder of piston 230.
  • roller 232 forming part of the lever mechanism 228 comes into contact with.
  • roller 233 coupled to the drive pulley 216 and whereby roller 210, also forming part of the lever mechanism 228 is released from winding roll 208.
  • the rate at which this process is accomplished is determined by the peripheral speed of roller 233. This speed is considerably lower than that of winding roll 208. That is, the speed at which the yarn is fed to buffer 204, 205 is considerably greater than the speed at which the yam is removed from the buffer.
  • the apparatus thereto comprises a third pneumatic control mechanism 235 and a second lever mechanism 236.
  • an air surge (air-relief pulsation) is delivered from this piston, via valve 218, to an air-operated slide valve 237 forming part of pneumatic control mechanism 235.
  • the latter control mechanism further comprises a piston 238 with a piston rod 239.
  • An air surge is supplied to piston 238 via slide valve 237; this air surge moves piston rod 239 a little to lift spool 209 off winding roll 208 for a short moment through the lever mechanism 236.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)

Abstract

Dans un procede d'enlevement d'un fil (207) enroule autour d'un tampon (206) et d'enroulage du fil sur une bobine enrouleuse (209) pour former une bobine de fil, un deplacement transversal du fil est prevu pour compenser les variations de tension. Ce deplacement transversal est transmis au fil par le fait que celui-ci est enleve du tampon dans une position changeant continuellement en raison des differences entre la vitesse a laquelle le fil quitte le tampon (206) et la vitesse a laquelle il arrive au tampon. Le deplacement transversal est converti en un signal de commande par une unite de detection, ce signal de commande etant applique a des moyens de reglage pour faire varier la vitesse d'enroulement du fil de telle maniere que ladite position qui change continuellement soit maintenue dans des limites fixes.
EP79901654A 1978-12-14 1980-07-01 Procede pour enlever un fil roule autour d'un tampon et pour enrouler le fil en une bobine, et appareil d'application de ce procede Withdrawn EP0020652A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL7812156A NL7812156A (nl) 1978-12-14 1978-12-14 Werkwijze voor het aftrekken van een, om een buffer geslagen garen en het opwikkelen hiervan tot een garen- pakket en inrichting ter uitvoering van deze werkwijze.
NL7812156 1978-12-14

Publications (1)

Publication Number Publication Date
EP0020652A1 true EP0020652A1 (fr) 1981-01-07

Family

ID=19832072

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79901654A Withdrawn EP0020652A1 (fr) 1978-12-14 1980-07-01 Procede pour enlever un fil roule autour d'un tampon et pour enrouler le fil en une bobine, et appareil d'application de ce procede

Country Status (10)

Country Link
EP (1) EP0020652A1 (fr)
JP (1) JPS55500985A (fr)
AU (1) AU5339279A (fr)
BE (1) BE880567A (fr)
ES (1) ES8101015A1 (fr)
IT (1) IT1120148B (fr)
NL (1) NL7812156A (fr)
PL (1) PL220387A1 (fr)
WO (1) WO1980001272A1 (fr)
ZA (1) ZA796229B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0277717B1 (fr) * 1987-01-16 1994-06-01 Toray Engineering Co., Ltd. Bobinoir de fil
IT1203378B (it) * 1987-03-19 1989-02-15 Savio Spa Procedimento e dispositivo per accumulare e restituire filo ad intermittenza nell'avvolgimento con rocche coniche alimentate con filo a velocita' costante
IT1203385B (it) * 1987-03-19 1989-02-15 Savio Spa Dispositivo e relativo procedimento per acummulare e restituire filo ad intermittenza nell'avvolgimento di rocche coniche alimentate con filo a velocita' costante

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH418193A (de) * 1964-10-15 1966-07-31 Fadis Spa Vorrichtung zur Phasenverschiebung in Kreuzspulmaschinen mit geschlitztem Fadenführungszylinder
US3905560A (en) * 1973-03-05 1975-09-16 Bancroft & Sons Co J Yarn winding mechanism
DE2706018C2 (de) * 1977-02-12 1979-04-26 Schubert & Salzer Maschinenfabrik Ag, 8070 Ingolstadt Spulvorrichtung
DE2716017C2 (de) * 1977-04-09 1979-04-26 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid Fadenbremse an einem Fadenspeicher

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8001272A1 *

Also Published As

Publication number Publication date
BE880567A (nl) 1980-04-01
JPS55500985A (fr) 1980-11-20
ZA796229B (en) 1980-11-26
ES487171A0 (es) 1980-12-16
IT7951007A0 (it) 1979-12-06
NL7812156A (nl) 1980-06-17
IT1120148B (it) 1986-03-19
PL220387A1 (fr) 1980-09-08
AU5339279A (en) 1980-06-19
WO1980001272A1 (fr) 1980-06-26
ES8101015A1 (es) 1980-12-16

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): CH DE FR GB NL SE

17P Request for examination filed

Effective date: 19801208

STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19820202

RIN1 Information on inventor provided before grant (corrected)

Inventor name: NIJHUIS, JAN