CA1113067A - High speed winder for non-extensible yarn - Google Patents
High speed winder for non-extensible yarnInfo
- Publication number
- CA1113067A CA1113067A CA319,469A CA319469A CA1113067A CA 1113067 A CA1113067 A CA 1113067A CA 319469 A CA319469 A CA 319469A CA 1113067 A CA1113067 A CA 1113067A
- Authority
- CA
- Canada
- Prior art keywords
- yarn
- disc
- package
- dancer roll
- peripheral groove
- 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.)
- Expired
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
- B65H54/00—Winding, coiling, or depositing filamentary material
- B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
- B65H54/28—Traversing devices; Package-shaping arrangements
- B65H54/32—Traversing devices; Package-shaping arrangements with thread guides reciprocating or oscillating with variable stroke
- B65H54/325—Traversing devices; Package-shaping arrangements with thread guides reciprocating or oscillating with variable stroke in accordance with growth 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
- B65H57/00—Guides for filamentary materials; Supports therefor
- B65H57/28—Reciprocating or oscillating guides
-
- 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
- B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
- B65H59/36—Floating elements compensating for irregularities in supply or take-up 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
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/31—Textiles threads or artificial strands of filaments
Landscapes
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Winding Filamentary Materials (AREA)
- Tension Adjustment In Filamentary Materials (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
An improvement in a yarn winding apparatus to permit the winding of substantially non-extensible yarn e.g.
air jet textured yarn, is disclosed. The apparatus includes:
(1) a friction roller capable of being driven and rotatably mounted on a frame in a vertical position; (2) a rotatable package in surface contact with the roller; (3) a sub-stantially horizontal layrail; (4) means for reciprocating the layrail longitudinally of the package; (5) an L-shaped arm rotatably mounted to the layrail at the elbow of the arm; (6) a rotatable disc having a peripheral groove eccentrically mounted to one end of the arm; and (7) a guide means extending substantially the length of the package, the other end of the L-shaped arm being slideably connected to the guide means, the disc being rotated by yarn travelling in the peripheral groove of the disc to the package. The improvement comprises a dancer roll having a peripheral groove rotatably mounted about its axis to the frame by a spring balancing means. The dancer roll is adapted to be rotated by yarn travelling in the peripheral groove of the roll on its way to the eccentrically mounted rotatable disc and the spring balancing means is adapted to allow the dancer roll to move towards and away from the rotatable disc as the dancer roll and the eccentrically mounted disc are rotated by the travelling yarn in order to keep the length of the yarn path from varying substantially as the disc rotates.
An improvement in a yarn winding apparatus to permit the winding of substantially non-extensible yarn e.g.
air jet textured yarn, is disclosed. The apparatus includes:
(1) a friction roller capable of being driven and rotatably mounted on a frame in a vertical position; (2) a rotatable package in surface contact with the roller; (3) a sub-stantially horizontal layrail; (4) means for reciprocating the layrail longitudinally of the package; (5) an L-shaped arm rotatably mounted to the layrail at the elbow of the arm; (6) a rotatable disc having a peripheral groove eccentrically mounted to one end of the arm; and (7) a guide means extending substantially the length of the package, the other end of the L-shaped arm being slideably connected to the guide means, the disc being rotated by yarn travelling in the peripheral groove of the disc to the package. The improvement comprises a dancer roll having a peripheral groove rotatably mounted about its axis to the frame by a spring balancing means. The dancer roll is adapted to be rotated by yarn travelling in the peripheral groove of the roll on its way to the eccentrically mounted rotatable disc and the spring balancing means is adapted to allow the dancer roll to move towards and away from the rotatable disc as the dancer roll and the eccentrically mounted disc are rotated by the travelling yarn in order to keep the length of the yarn path from varying substantially as the disc rotates.
Description
i'7 This invention rel~te~ to a vertically mounted high speed winding device for subRtantially non-extensible yarns, ~or example, alr ~et textured yarns.
As used herein the term "high speed winding" means winding at a yarn speed in the range of ~rom at least 300 meters per minute to about 1000 meters per minute. The~te~
"helix angle?' means the acute angle between the helix or convolution of the yarn and a diametrical plane intersectin~
the convolutlon.
Several winding device3 known in the art utilize a relatively low speed yarn traversing means which hss diminl~hing stroke length as the yarn pacXage bullds i~
order to produce ~ p~ckage wlth coni.cal ends. When such a devi~e i9 used for high speed windix~g of textile yarnsJ
the yarn i8 laid down on the packaEe~ at a small helix angle because of a high yarn ~peed ~o tra~erse speed ratio. As a consequence of the sm~ll helix ~gle~ the yarn p~ckage so produced tends to exhibit poor yarn take-o~ character-i3tlc~ and also tend~ to have unstable conical portions due to sloughin~ o~ the ~arn there~rom caused by inadequate ; cohesion between the yarn at ths package ends and the package body.
U.S. Patent No. 4 085 903 uhich is`sued April 25, 1978 to E~D. Euhnemann dlsclo~es a yarn ~inding devlce for ~alse twist textured ~ar~s~i.e. e~tensible yarns in which a vertically ~ounted rotatable:package i9 driven by sur~ace contact with a driven roller. An eccentrically mounted rotatable disc h~ving a peripheral ~roove is positioned on ' -.
. .. , , . .:
.
As used herein the term "high speed winding" means winding at a yarn speed in the range of ~rom at least 300 meters per minute to about 1000 meters per minute. The~te~
"helix angle?' means the acute angle between the helix or convolution of the yarn and a diametrical plane intersectin~
the convolutlon.
Several winding device3 known in the art utilize a relatively low speed yarn traversing means which hss diminl~hing stroke length as the yarn pacXage bullds i~
order to produce ~ p~ckage wlth coni.cal ends. When such a devi~e i9 used for high speed windix~g of textile yarnsJ
the yarn i8 laid down on the packaEe~ at a small helix angle because of a high yarn ~peed ~o tra~erse speed ratio. As a consequence of the sm~ll helix ~gle~ the yarn p~ckage so produced tends to exhibit poor yarn take-o~ character-i3tlc~ and also tend~ to have unstable conical portions due to sloughin~ o~ the ~arn there~rom caused by inadequate ; cohesion between the yarn at ths package ends and the package body.
U.S. Patent No. 4 085 903 uhich is`sued April 25, 1978 to E~D. Euhnemann dlsclo~es a yarn ~inding devlce for ~alse twist textured ~ar~s~i.e. e~tensible yarns in which a vertically ~ounted rotatable:package i9 driven by sur~ace contact with a driven roller. An eccentrically mounted rotatable disc h~ving a peripheral ~roove is positioned on ' -.
. .. , , . .:
.
- 2 -a reciprocati~g tra~erse means which is adapted to traverse to and fro along the length of the package as yarn is wound thereon. The rotation of the disc about its eccentric axis caused by the yarn travelling in the peripheral groove of the dlsc imparts a sinusoidal pattern to the yarn being laid down on the package thus providing a substantial an~le between successive wraps of yarn on the package. The presence of the sinusoidal pattern and the substantial helix angle improves the take-off characteristics of the yarn and also ensures good cohesion between the yarn at the package ends and the package body i.e. the sinusoidal pattern e~fectively locks the yarn at the package ends into the package body.
The yarn winding device disclosed in the afore-mentioned U.S. Patent 4 085 903 is very satisfactory whereussd for the high speed winding of false twis~ textured or other extensible yarn. Xowever, the winding device of U.S.
Patent 4 o85 903~ where employed for high speed winding of substantially non-extensible yarn, ~or example such a yarn produced by an air ~et texturing device, has the disadvan-tages of high winding tension peaks and that at certain positions of the reciprocating traverse means the rotation o~ the eccentrically ~ounted disc tends to slow down at the polnt where the yarn path around the peripheral ~roove of the disc to the yarn package is at its shorte,st length.
This slowing down of the disc rotation, which is believed to be due to the inability of the substantially non-exten-sible yarn to compensate ~or the changing length of the yarn path around the peripheral groove of the disc, causes
The yarn winding device disclosed in the afore-mentioned U.S. Patent 4 085 903 is very satisfactory whereussd for the high speed winding of false twis~ textured or other extensible yarn. Xowever, the winding device of U.S.
Patent 4 o85 903~ where employed for high speed winding of substantially non-extensible yarn, ~or example such a yarn produced by an air ~et texturing device, has the disadvan-tages of high winding tension peaks and that at certain positions of the reciprocating traverse means the rotation o~ the eccentrically ~ounted disc tends to slow down at the polnt where the yarn path around the peripheral ~roove of the disc to the yarn package is at its shorte,st length.
This slowing down of the disc rotation, which is believed to be due to the inability of the substantially non-exten-sible yarn to compensate ~or the changing length of the yarn path around the peripheral groove of the disc, causes
3 unacceptable yarn package characteristics.
It has now been found that the above disadvantage may be overcome and non-extensible yarn may be wound at high speed on such a yar~ winding de~ice by the provision of a -"
dancer, roll prior to the eccentrically mounted rotatable disc~ the dancer roll being spring balanced and adapted to ~ove toward and away from the eccentrically mounted disc as the dancer roll and the disc are rotated by the travelling yarn. "
,. ~ ....... - . ........................... .- . . .
- : . . . .
'7 Accordingly the present invention provides in a yarn winding apparatus comprising a friction roller capable of being driven and rotatably mounted on a frame in a vertical position, a rotatable package in surface -contact with the roller; a substantially horizontal layraii;
means for reciprocating the layrail longitudinally of the package; an L,shaped arm rotatably mounted to the layrail at the elbow of the arm; a rotatable disc having a peri-pheral groove eccentrically mounted to one end of the arm, the disc and the arm being coplanar~ a guide means extending substantially the length o~ the package3 the other end of said L-shaped arm being slideably connected to the guide means, the disc being adapted to be rotated by yarn travelling in the peripheral groove of the disc to the package, the improvement comprising: a dancer roll having a peripheral groove rotatably mounted about its axis to the frame by a spring balancing means, the dancer roll being adapted to be rotated by yarn travelling in the peripheral groove of the roll on it~ way to the rotatable disc, the spring balanci`ng means being adapted to allow the dancer roll to move towards and away from the rotatable disc as the dancer roll and the rotatable d1sc are rotated by travelling yarn.
In on~ embodiment o~ the present invention the spring balancing means comprises at least one leaf spring attached at one of its ends to the frame and at the other to an axle of the dancer roll.
In another embodiment of the present invention ` the spring balancin~ means comprises two leaf springs, one positioned on each side of the dancer roll.
In yet another em~odiment of the present invention the spring balancing means comprises a spring actuated support arm attached at one of its ends to the frame and at the other to an axle of the dancer roll.
In yet another embodiment of the present invention the support arm is ac~uated by a torsion spring.
In a ~urther embodiment o~ the present inventlon the support ar~ is actuated by an extension coil spring.
. -.
, .
.
In a still further embodiment o~ the present invention the support arm is actuated by a compression spring.
Embodiments of the invention will be described in greater detail with the aid of the accompan~ing dr~w-ings in which:
Fig. 1 is a schematic view of one embodiment of the present invention (with parts remo~-ed for clarity) in which the effective stroke length is reduced as the package diameter increases, by means of a mechanical linkage (includ-ing a U-track guide means) which senses the package build up;
Fig. 2 is a ~ragmentary view of the embodiment of Fig. 1 showing the U-track in position ~or maximum stroke with the layrail and the eccentrically mounted rotatable disc depicted (ior ease of understanding) in both their hi~hest and lowest positions;
Fig. 3 is a ~ragmentary v:Lew o~ the embodiment of Fig. 1 showing the U-track in posltion for minimum stroke with the layrail and the eccentrically mounted rotatable disc again depicted (for i~ase of understanding) in both their highest and their lowest positions;
Fig. 4 is a fragmentary ~'Lew of the embodiment oP Fig. 1 showing the change in p~s'Ltion o~ the dancer roll and o~ the spring balancing me~ms by which the dancer roll is mounted to the frame in response to rotation o~ the eccentrically mounted rotatable disc; ~-.
Fig. 5 is a schematic view of an e~odiment o~
the present invention showing an alternative to the spring balancing means depicted in Fig. 4;
Fig. 6 is a schematic view of an embodiment of - the present invention showing another alternative to the spring balancing mesn~ depicted in Fig~ 4; and Figo 7 is a schematîc view o~ an embodiment o~
35 the present invention showing ~et another alternative to `.
the spring balancing means o~ ~ig. 4.
In the drawings, Fig. 1 sho~s a yarn tube 10 on which a pac~age 11 is built during winding. The yarn tube .
5 1~
10 is carried by chuck arms 12 and 13 which are mounted on sha~t 14. Shaft 14 is rotatably mounted such that chuck arms 12 and 13 can rotate about its axis as the package diameter increases.
The package 11 is driven at a hi~h constant peripheral speed by a friction roller 15 against which it is held by means described hereinafter. The friction roller 15 is driven by a belt (not shown).
A traversing mechanism 16 is provided to guide the yarn to be wound, onto the sur~ace of ~riction roller 15 which in turn la~s it on package 11. Traversing mech-anism 16 ~see also Fig. 2 and Fig. 3! comprises an eccentri-cally mounted rotatable disc 17 having a peripheral groove 17A arranged on one end of an L-shaped lever 18 b~ which it is reciprocated longitudinally of the yarn tube 10. The L-shaped lever 18 is rotatably attached at its elbow by a pin 19 to a layrail 20 which extends over the entire length of a winding machine and is common to all of the Irshaped levers on one side of the machine. L~yrail 20 is driven with respect to m~chine frame 21 to reciprocate longitudi-nally of the yarn tube 10 at a constant stroke length.
Arranged on the other end of L-shaped lever 18 is a slide block 22 which is guided in a guide means, depicted in this embodiment as a U-track 23, in such a way that, during the reciprocation o~ layrail 20, it can slide to and fro in it. U-track 23 is pivota~ly mounted to frame 21 by pin 24. An arm 25 is rigidl~ attached ~o a midpoint of U-track 23 and extends therfrom normally to the axis o~ pin 24. A mid point of arm 25 i9 engaged by a spring 26 anchored in the machine frame 21. The free end of arm 25 is connected by cable (or chain) 27 over a chan~e-of-direction roll 28 to the side of chuck ar~ 13. With this arrangement, spring 26 attempts to rotate U-trac~ 23 (clockwise) about pin 24, which in turn (via cable 27) pulls on chuck arm 13 and hence holds package 11 firmly against friction roller 15.
A dancer roll 29 having peripheral groove 29A
(see also Fig. 4) is provided upstream of eccentrically mounted rotatable disc 17. Dancer roll 29 is axially , .~., . .. . .. .. :
.
-,. , D~-- 6 --mounted on axle 30 to ~rame 21 by a spring balancing means 31. In the embodlment of Fig. 1 and Fig. 4, spring bal-ancing means 31 is depicted as a pair of lea~ springs 32 positioned one on each side of dancer roll 29. One end of each lea~ spring 32 is attached to axle 30 and the other end o~ each lea~ spring 32 is attached via clamping sup-port 33 to frame 21.
Some variations of spring balancing means 31 are shown in Fig. 5 to Fig. 7 inclusive. In Fig. 5 one end o~
a support a~m 34 is attached to axle 30 and the other end of support arm 34 is pivotabl~ mounted to ~rame 21 by pin 35. A torsion sprlng 37 urges support arm 34 towards stop 36 which keeps support arm 34 from rotataing counter clock-wise beyond its operating position. The embodiment shown in Fig. 6 is the same as that of Fig. 5 except that an extension spring 37A replaces torsion spring 37. In Fig. 7, one end of a support arm 34A is attached to axle 30 and the other end of support arm 34A is attached to a compression spring 37B positioned in a housing 38. Housing 38 is attached to frame 21 via support bracket 39.
In operation, yarn Y preferably substantially non-extensible air ~et textured yarl~, for example such yarn obtained directly from an air ~et texturing process, travels part way around dancer roll 29 in peripheral groove 29A, part way around eccentrically mounted rotatable disc 17, in peripheral groove 17A, part way around friction roll 15 and is wound up on yarn tube 10 as a package 11. Spring 26 acting via arm 25, cable 27 and chuck arm 13 holds pack-age 11 against friction roller 15 which is rotatably driven at constant ~peed.
At the beginning of package ~ormation~ yarn tube 10 touches friction roller 15. With the yarn tube in this position~ spring 26 acting through arm 25 pi~ots U-track 23 clockwise about pin 24 to the position shown in Fig. 2.
With U-trac~ 23 in this position, the reciprocation o~ lay-rail 20 at constant stroke length causes slide block 22 arranged at one end of L-shaped lever 18 to slide to and fro in U-track 23. As this motion occursJ I-sh2ped lever ... . . ~ .
:- . : . ,: ~ .
-, ' . . '- : . ., - . ~: ' :
', . .
18 rotates on pin 19 such that eccentrically mounted rota~-able disc 17, arranged at the other end of L-shaped lever 18, periorms a yarn winding stroke o~ ma~imum length.
As the substantially non-extensible yarn Y travels around rotatable disc 17 in peripheral groove 17AJ it rotates disc 17 about its eccentric axis and causes the yarn to be laid down on package 11 in a sinusoidal pattern. This sinu-soidal pattern tends to prevent yarn sloughing from the ends of package 11 by ensuring good cohesion between the yarn at the ends of the package and the package body i.e. the sinu-soidal loops of yarn in successive yarn loops and in succes-sive yarn layers overlap substantially and ef~ectively loc~
the yarn at the package ends into the package body. The presence o~ dancer roll 29 tends to prevent the slowing down of the rotation of rotatable disc 17, which might otherwise occur frequently in winding substantially non-extensible yarn Y, at the point where the path of yarn Y
around peripheral groove 17A is at its shortest distance (see Fig. 4). Dancer roll 29 does this in the following manner. In Fig. 4J the eccentrically mounted rotatable disc is depicted in its position where the path o~ the yarn around peripheral groove 17A is at its shortest length by the solid outline 17. When the disc 17 is in this positionJ
lea~ springs 32 to which dancer roll 29 is mounted on axle 3 extend substantially straight out from clamping support 33. The path of the non-extensible yarn around peripheral groove 29A of dancer roll 29 and around peripheral groove 17A o~ eccentrically mounted disc 17 is shown by solid line Y. As the rotatable disc rotates about its eccentric axis, it moves towards a position where the path of the yarn around peripheral groove 17A is at its greatest length depicted in ~. 4 by the dotted line 17'. As the rotatable disc moves towards position 17', it begins to increase the tension on the non-extensible yarn due to the increasing length of the yarn path. However, as soon as the yarn tension begins to increase, the lea~ springs begin to bend downwardly towards a position shown by dotted outline 32' thereb~ carrying the dancer roll towards a position shown . ~ . . , , . '' ~ , .
. ' ` ' .
~ t7 by dotted outline 29'. The new path of the non-extensible yarn around ~eripheral groove 2~A' of dancer roll 2~' and around peripheral groove 17A' of eccentrically mounted disc 17' is shown by dotted line Y'. It may be observed from Fig. 4. that the length of the yarn paths shown by olid line Y and dotted line Y' are substantially the same.
~ince the length of the yarn path remains substantially constant as the rotatable disc 17 is rotated about its eccentric axis, large variations in yarn tension, which could cause the slowing down of the rotation o~ the rotatable disc 17 during the winding of substantially non-extensible yarn e.g. air ~et-textured yarn and result in poor yarn package characteristicsl are substantially eliminated.
It will be appreciated that the length and~or the thickness of leaf springs 32 may be var1ed depending on the dtex of the substantially non-extensible yarn Y and the wind up tension.
Referr~ng again to Fig, 1~, as the diameter o~
package 11 increases, chuck arm 13 moves in a clockwlse direction and via cable 27 and arm 25, pivots U-track 23 counter clockwise ~bout pin 2~, aga'Lnst the pull o~ spring 26, gradually, until at the complet'Lon of p~ckage ~ormation, U-track 23 is in the position shown in Fig. 3. With U-track 23 in this position, the reciprocation o~ layrail 20 at constant stroke length causes slide block 22 arranEed at one end of L-shaped leYer 18 to slide to and fro in U-track 23.
As this motion occurs, L-shaped lever 18 rotates on pin 19 such that eccentrically mounted rotatable disc 17, arranged 30 at the other end of L-shaped lever 18~ performs a yarn ~ -winding stroke o~ minimum length. Thus a conical ended package is produced having a length next to the yarn tube equivalent to the maximum yarn winding stroke and a lengtn at its outer surface equivalent to the minimum yarn winding stroke of the eccentrically mounted rotatable disc 17.
Mechanisms for pivoting U-track 23 about pin 24 as the diameter of the package 11 increases other t'nan that shown in Fig. 1 are depicted in Fig. 1 and Fig. 4 o~ the .
- ' ' .
... . : ,, . .
$~7 a~ore~entioned U.S. Patent 4 o85 903.
The present in~ention is illustrated by the followi~g examples.
EXAMPLE I
A 1055 dtex - 135 ~ilament nylon 66 air ~et textured yarn was fed directly from an air jet texturing ~rocess and wound up on packages. The air jet textured yarn was substantially non-extensible. The apparatus used to wind the yarn was similar to that shown in Fig. 1 and described hereinbefore. The eccentrically mounted rotatable disc 17 was 4.45 cm in diameter and mounted 1.27 cm ~rom its centre. Dancer roll 29, which was made from nylon and light in weightJ was 2.5 c~ in diameter. The unsupported length of leaf springs 32 to axle 30 of dancer roll 29 was
It has now been found that the above disadvantage may be overcome and non-extensible yarn may be wound at high speed on such a yar~ winding de~ice by the provision of a -"
dancer, roll prior to the eccentrically mounted rotatable disc~ the dancer roll being spring balanced and adapted to ~ove toward and away from the eccentrically mounted disc as the dancer roll and the disc are rotated by the travelling yarn. "
,. ~ ....... - . ........................... .- . . .
- : . . . .
'7 Accordingly the present invention provides in a yarn winding apparatus comprising a friction roller capable of being driven and rotatably mounted on a frame in a vertical position, a rotatable package in surface -contact with the roller; a substantially horizontal layraii;
means for reciprocating the layrail longitudinally of the package; an L,shaped arm rotatably mounted to the layrail at the elbow of the arm; a rotatable disc having a peri-pheral groove eccentrically mounted to one end of the arm, the disc and the arm being coplanar~ a guide means extending substantially the length o~ the package3 the other end of said L-shaped arm being slideably connected to the guide means, the disc being adapted to be rotated by yarn travelling in the peripheral groove of the disc to the package, the improvement comprising: a dancer roll having a peripheral groove rotatably mounted about its axis to the frame by a spring balancing means, the dancer roll being adapted to be rotated by yarn travelling in the peripheral groove of the roll on it~ way to the rotatable disc, the spring balanci`ng means being adapted to allow the dancer roll to move towards and away from the rotatable disc as the dancer roll and the rotatable d1sc are rotated by travelling yarn.
In on~ embodiment o~ the present invention the spring balancing means comprises at least one leaf spring attached at one of its ends to the frame and at the other to an axle of the dancer roll.
In another embodiment of the present invention ` the spring balancin~ means comprises two leaf springs, one positioned on each side of the dancer roll.
In yet another em~odiment of the present invention the spring balancing means comprises a spring actuated support arm attached at one of its ends to the frame and at the other to an axle of the dancer roll.
In yet another embodiment of the present invention the support arm is ac~uated by a torsion spring.
In a ~urther embodiment o~ the present inventlon the support ar~ is actuated by an extension coil spring.
. -.
, .
.
In a still further embodiment o~ the present invention the support arm is actuated by a compression spring.
Embodiments of the invention will be described in greater detail with the aid of the accompan~ing dr~w-ings in which:
Fig. 1 is a schematic view of one embodiment of the present invention (with parts remo~-ed for clarity) in which the effective stroke length is reduced as the package diameter increases, by means of a mechanical linkage (includ-ing a U-track guide means) which senses the package build up;
Fig. 2 is a ~ragmentary view of the embodiment of Fig. 1 showing the U-track in position ~or maximum stroke with the layrail and the eccentrically mounted rotatable disc depicted (ior ease of understanding) in both their hi~hest and lowest positions;
Fig. 3 is a ~ragmentary v:Lew o~ the embodiment of Fig. 1 showing the U-track in posltion for minimum stroke with the layrail and the eccentrically mounted rotatable disc again depicted (for i~ase of understanding) in both their highest and their lowest positions;
Fig. 4 is a fragmentary ~'Lew of the embodiment oP Fig. 1 showing the change in p~s'Ltion o~ the dancer roll and o~ the spring balancing me~ms by which the dancer roll is mounted to the frame in response to rotation o~ the eccentrically mounted rotatable disc; ~-.
Fig. 5 is a schematic view of an e~odiment o~
the present invention showing an alternative to the spring balancing means depicted in Fig. 4;
Fig. 6 is a schematic view of an embodiment of - the present invention showing another alternative to the spring balancing mesn~ depicted in Fig~ 4; and Figo 7 is a schematîc view o~ an embodiment o~
35 the present invention showing ~et another alternative to `.
the spring balancing means o~ ~ig. 4.
In the drawings, Fig. 1 sho~s a yarn tube 10 on which a pac~age 11 is built during winding. The yarn tube .
5 1~
10 is carried by chuck arms 12 and 13 which are mounted on sha~t 14. Shaft 14 is rotatably mounted such that chuck arms 12 and 13 can rotate about its axis as the package diameter increases.
The package 11 is driven at a hi~h constant peripheral speed by a friction roller 15 against which it is held by means described hereinafter. The friction roller 15 is driven by a belt (not shown).
A traversing mechanism 16 is provided to guide the yarn to be wound, onto the sur~ace of ~riction roller 15 which in turn la~s it on package 11. Traversing mech-anism 16 ~see also Fig. 2 and Fig. 3! comprises an eccentri-cally mounted rotatable disc 17 having a peripheral groove 17A arranged on one end of an L-shaped lever 18 b~ which it is reciprocated longitudinally of the yarn tube 10. The L-shaped lever 18 is rotatably attached at its elbow by a pin 19 to a layrail 20 which extends over the entire length of a winding machine and is common to all of the Irshaped levers on one side of the machine. L~yrail 20 is driven with respect to m~chine frame 21 to reciprocate longitudi-nally of the yarn tube 10 at a constant stroke length.
Arranged on the other end of L-shaped lever 18 is a slide block 22 which is guided in a guide means, depicted in this embodiment as a U-track 23, in such a way that, during the reciprocation o~ layrail 20, it can slide to and fro in it. U-track 23 is pivota~ly mounted to frame 21 by pin 24. An arm 25 is rigidl~ attached ~o a midpoint of U-track 23 and extends therfrom normally to the axis o~ pin 24. A mid point of arm 25 i9 engaged by a spring 26 anchored in the machine frame 21. The free end of arm 25 is connected by cable (or chain) 27 over a chan~e-of-direction roll 28 to the side of chuck ar~ 13. With this arrangement, spring 26 attempts to rotate U-trac~ 23 (clockwise) about pin 24, which in turn (via cable 27) pulls on chuck arm 13 and hence holds package 11 firmly against friction roller 15.
A dancer roll 29 having peripheral groove 29A
(see also Fig. 4) is provided upstream of eccentrically mounted rotatable disc 17. Dancer roll 29 is axially , .~., . .. . .. .. :
.
-,. , D~-- 6 --mounted on axle 30 to ~rame 21 by a spring balancing means 31. In the embodlment of Fig. 1 and Fig. 4, spring bal-ancing means 31 is depicted as a pair of lea~ springs 32 positioned one on each side of dancer roll 29. One end of each lea~ spring 32 is attached to axle 30 and the other end o~ each lea~ spring 32 is attached via clamping sup-port 33 to frame 21.
Some variations of spring balancing means 31 are shown in Fig. 5 to Fig. 7 inclusive. In Fig. 5 one end o~
a support a~m 34 is attached to axle 30 and the other end of support arm 34 is pivotabl~ mounted to ~rame 21 by pin 35. A torsion sprlng 37 urges support arm 34 towards stop 36 which keeps support arm 34 from rotataing counter clock-wise beyond its operating position. The embodiment shown in Fig. 6 is the same as that of Fig. 5 except that an extension spring 37A replaces torsion spring 37. In Fig. 7, one end of a support arm 34A is attached to axle 30 and the other end of support arm 34A is attached to a compression spring 37B positioned in a housing 38. Housing 38 is attached to frame 21 via support bracket 39.
In operation, yarn Y preferably substantially non-extensible air ~et textured yarl~, for example such yarn obtained directly from an air ~et texturing process, travels part way around dancer roll 29 in peripheral groove 29A, part way around eccentrically mounted rotatable disc 17, in peripheral groove 17A, part way around friction roll 15 and is wound up on yarn tube 10 as a package 11. Spring 26 acting via arm 25, cable 27 and chuck arm 13 holds pack-age 11 against friction roller 15 which is rotatably driven at constant ~peed.
At the beginning of package ~ormation~ yarn tube 10 touches friction roller 15. With the yarn tube in this position~ spring 26 acting through arm 25 pi~ots U-track 23 clockwise about pin 24 to the position shown in Fig. 2.
With U-trac~ 23 in this position, the reciprocation o~ lay-rail 20 at constant stroke length causes slide block 22 arranged at one end of L-shaped lever 18 to slide to and fro in U-track 23. As this motion occursJ I-sh2ped lever ... . . ~ .
:- . : . ,: ~ .
-, ' . . '- : . ., - . ~: ' :
', . .
18 rotates on pin 19 such that eccentrically mounted rota~-able disc 17, arranged at the other end of L-shaped lever 18, periorms a yarn winding stroke o~ ma~imum length.
As the substantially non-extensible yarn Y travels around rotatable disc 17 in peripheral groove 17AJ it rotates disc 17 about its eccentric axis and causes the yarn to be laid down on package 11 in a sinusoidal pattern. This sinu-soidal pattern tends to prevent yarn sloughing from the ends of package 11 by ensuring good cohesion between the yarn at the ends of the package and the package body i.e. the sinu-soidal loops of yarn in successive yarn loops and in succes-sive yarn layers overlap substantially and ef~ectively loc~
the yarn at the package ends into the package body. The presence o~ dancer roll 29 tends to prevent the slowing down of the rotation of rotatable disc 17, which might otherwise occur frequently in winding substantially non-extensible yarn Y, at the point where the path of yarn Y
around peripheral groove 17A is at its shortest distance (see Fig. 4). Dancer roll 29 does this in the following manner. In Fig. 4J the eccentrically mounted rotatable disc is depicted in its position where the path o~ the yarn around peripheral groove 17A is at its shortest length by the solid outline 17. When the disc 17 is in this positionJ
lea~ springs 32 to which dancer roll 29 is mounted on axle 3 extend substantially straight out from clamping support 33. The path of the non-extensible yarn around peripheral groove 29A of dancer roll 29 and around peripheral groove 17A o~ eccentrically mounted disc 17 is shown by solid line Y. As the rotatable disc rotates about its eccentric axis, it moves towards a position where the path of the yarn around peripheral groove 17A is at its greatest length depicted in ~. 4 by the dotted line 17'. As the rotatable disc moves towards position 17', it begins to increase the tension on the non-extensible yarn due to the increasing length of the yarn path. However, as soon as the yarn tension begins to increase, the lea~ springs begin to bend downwardly towards a position shown by dotted outline 32' thereb~ carrying the dancer roll towards a position shown . ~ . . , , . '' ~ , .
. ' ` ' .
~ t7 by dotted outline 29'. The new path of the non-extensible yarn around ~eripheral groove 2~A' of dancer roll 2~' and around peripheral groove 17A' of eccentrically mounted disc 17' is shown by dotted line Y'. It may be observed from Fig. 4. that the length of the yarn paths shown by olid line Y and dotted line Y' are substantially the same.
~ince the length of the yarn path remains substantially constant as the rotatable disc 17 is rotated about its eccentric axis, large variations in yarn tension, which could cause the slowing down of the rotation o~ the rotatable disc 17 during the winding of substantially non-extensible yarn e.g. air ~et-textured yarn and result in poor yarn package characteristicsl are substantially eliminated.
It will be appreciated that the length and~or the thickness of leaf springs 32 may be var1ed depending on the dtex of the substantially non-extensible yarn Y and the wind up tension.
Referr~ng again to Fig, 1~, as the diameter o~
package 11 increases, chuck arm 13 moves in a clockwlse direction and via cable 27 and arm 25, pivots U-track 23 counter clockwise ~bout pin 2~, aga'Lnst the pull o~ spring 26, gradually, until at the complet'Lon of p~ckage ~ormation, U-track 23 is in the position shown in Fig. 3. With U-track 23 in this position, the reciprocation o~ layrail 20 at constant stroke length causes slide block 22 arranEed at one end of L-shaped leYer 18 to slide to and fro in U-track 23.
As this motion occurs, L-shaped lever 18 rotates on pin 19 such that eccentrically mounted rotatable disc 17, arranged 30 at the other end of L-shaped lever 18~ performs a yarn ~ -winding stroke o~ minimum length. Thus a conical ended package is produced having a length next to the yarn tube equivalent to the maximum yarn winding stroke and a lengtn at its outer surface equivalent to the minimum yarn winding stroke of the eccentrically mounted rotatable disc 17.
Mechanisms for pivoting U-track 23 about pin 24 as the diameter of the package 11 increases other t'nan that shown in Fig. 1 are depicted in Fig. 1 and Fig. 4 o~ the .
- ' ' .
... . : ,, . .
$~7 a~ore~entioned U.S. Patent 4 o85 903.
The present in~ention is illustrated by the followi~g examples.
EXAMPLE I
A 1055 dtex - 135 ~ilament nylon 66 air ~et textured yarn was fed directly from an air jet texturing ~rocess and wound up on packages. The air jet textured yarn was substantially non-extensible. The apparatus used to wind the yarn was similar to that shown in Fig. 1 and described hereinbefore. The eccentrically mounted rotatable disc 17 was 4.45 cm in diameter and mounted 1.27 cm ~rom its centre. Dancer roll 29, which was made from nylon and light in weightJ was 2.5 c~ in diameter. The unsupported length of leaf springs 32 to axle 30 of dancer roll 29 was
4.9 cm. As in indication of the stiffness of leaf springs 32, a weight of 715 g (7.0 newtons) acting on axle 30 was sufficient to deflect leaf springs 32 such that dancer roll 29 moved 0.61 cm towards eccentrically mounted rotatable disc 17 (with a weight of 1860 g (18.15 newtons) dancer roll 29 was moved 1.60 cm). The air ~et textured yarn was fed from the air jet texturing process at a speed of 340 meters/min and was wound up on packages at a speed o~ 355 meters/min. The layrail cycle of layrail 20 was 41 seconds and the layrail stroke length was 29.2 cm. Therefore the yarn speed to traverse speed ratio was 415:1. Three yarn packages ~ere wound on paper tubes having a diameter of 10.5 cm and a length of 34.3 cm. The taper angle of the conical ends o~ each package was 33. An examinatlon of the three yarn packages indicated that: ~1) the yarn at both ends of each p~ckage was firmly locked into the pack-age body; and (2) the conical ends ~f all three packages exhibited no tendency for yarn to slough therefrom.
EXAMPLE II
A 1060 dtex - 136 filament nylon 66 air ~et textured yarn was fed directly from an air jet texturing process and wound up on packages. The apparatus used to wind the yarn was similar to that shown in Fig. 1 and described hereinabove except that: (1) the eccentrically ;
. ~ . . .
: .
' ... ~
.,. . , . ., , - . . - .
t~ P~
mounted rotatable disc 17 was replaced by an axially mounted disc; and '2! no dancer roll 29 and no spring balancing means 31 were provided, these ~eatures being redundant in the absence o~ the eccent~ically mo~nted disc 17. The air jet textured yarn was ~ed from the air jet texturing process at a speed of 340 meters/min and wo~1nd up on packages at a speed of 355 meters/min. The layrail cycle of layrail 20 was 41 seconds and the layrail stroke length was 29.2 cm. Therefore, the initial yarn speed to traverse speed ratio was 415:1. Nine yarn packages were wound on paper tubes having the same dimensions and with conical ends having the same taper angle as ~or the yarn packages of EXAMPLE I. An examination of the nine packageis indicated that: (l? a number of yarn convolutions had ~allen loose from the bottom conical end of several packages, and ~2) both conical ends of all nine packages were very sensi-tive to sloughing of yarn therefrom.
This example illustrates that yarn packages produced at the above high yarn speed to traverse speed ratio on a winder without the eccentrically mounted rotatable disc 17J are unsatisfactory.
EXAMPLE III
A 645 dtex - 102 filament polyester air Jet textured yarn was fed directly from an air Jet texturing process and wound on packages. The apparatus was the same as that described in EXAMPLE I. The air jet textured yarn was fed from the air jet texturing process at a speed of 336 meters/min and wound up on pac~ages at a speed 346 meters/
min. Several yarn packages were wound up similar to those produced in Example I. The conical ends of each of these packages exhibited the same good package stability i.e. no `tendency for the yarn to slough off the package~ as did the packages of EXAMPLE I.
After the winding of the above package, in order to illustrate the e~ect of not having a dancer roll in the apparatusJ the position of axle 30 o~ dancer roll 29 was suddenly fixed while the winder was in operation. This meant that the dancer roll 29 could not move towards ,.
.. . : . .
- , : -: : , .
eccentrically mounted rotatable disc 17 each time there was an increase in yarn tension. As soon as the position of axle 30 was ~ixed the L-shaped l.ever 18 (on which eccentri-cally mounted rotatable disc 17 was mounted) began to vibrate excessively due to yarn tension peaks which occurred on each revolution of eccentrically mounted disc 17. When layrail 20 reached the top of its stroke, eccentrically mounted rotatable disc 17 slowed down and rapidly came to a stop making it necessary to stop the winding operation in order to a~oid damage to the then stationary eccentrically mounted rotatable disc 17.
This latter experiment indicates that if the dancer roll 29 and leaf springs 32 are omitted from the apparatus of Fig. 1~ the remaining yarn winding apparatus is unsuitable for winding substantially non-extensible yarn such as air ~et textured yarn.
.:
- . ,- . . . -.,, ,, , - :
,: . ~ , , ~' ' ` '
EXAMPLE II
A 1060 dtex - 136 filament nylon 66 air ~et textured yarn was fed directly from an air jet texturing process and wound up on packages. The apparatus used to wind the yarn was similar to that shown in Fig. 1 and described hereinabove except that: (1) the eccentrically ;
. ~ . . .
: .
' ... ~
.,. . , . ., , - . . - .
t~ P~
mounted rotatable disc 17 was replaced by an axially mounted disc; and '2! no dancer roll 29 and no spring balancing means 31 were provided, these ~eatures being redundant in the absence o~ the eccent~ically mo~nted disc 17. The air jet textured yarn was ~ed from the air jet texturing process at a speed of 340 meters/min and wo~1nd up on packages at a speed of 355 meters/min. The layrail cycle of layrail 20 was 41 seconds and the layrail stroke length was 29.2 cm. Therefore, the initial yarn speed to traverse speed ratio was 415:1. Nine yarn packages were wound on paper tubes having the same dimensions and with conical ends having the same taper angle as ~or the yarn packages of EXAMPLE I. An examination of the nine packageis indicated that: (l? a number of yarn convolutions had ~allen loose from the bottom conical end of several packages, and ~2) both conical ends of all nine packages were very sensi-tive to sloughing of yarn therefrom.
This example illustrates that yarn packages produced at the above high yarn speed to traverse speed ratio on a winder without the eccentrically mounted rotatable disc 17J are unsatisfactory.
EXAMPLE III
A 645 dtex - 102 filament polyester air Jet textured yarn was fed directly from an air Jet texturing process and wound on packages. The apparatus was the same as that described in EXAMPLE I. The air jet textured yarn was fed from the air jet texturing process at a speed of 336 meters/min and wound up on pac~ages at a speed 346 meters/
min. Several yarn packages were wound up similar to those produced in Example I. The conical ends of each of these packages exhibited the same good package stability i.e. no `tendency for the yarn to slough off the package~ as did the packages of EXAMPLE I.
After the winding of the above package, in order to illustrate the e~ect of not having a dancer roll in the apparatusJ the position of axle 30 o~ dancer roll 29 was suddenly fixed while the winder was in operation. This meant that the dancer roll 29 could not move towards ,.
.. . : . .
- , : -: : , .
eccentrically mounted rotatable disc 17 each time there was an increase in yarn tension. As soon as the position of axle 30 was ~ixed the L-shaped l.ever 18 (on which eccentri-cally mounted rotatable disc 17 was mounted) began to vibrate excessively due to yarn tension peaks which occurred on each revolution of eccentrically mounted disc 17. When layrail 20 reached the top of its stroke, eccentrically mounted rotatable disc 17 slowed down and rapidly came to a stop making it necessary to stop the winding operation in order to a~oid damage to the then stationary eccentrically mounted rotatable disc 17.
This latter experiment indicates that if the dancer roll 29 and leaf springs 32 are omitted from the apparatus of Fig. 1~ the remaining yarn winding apparatus is unsuitable for winding substantially non-extensible yarn such as air ~et textured yarn.
.:
- . ,- . . . -.,, ,, , - :
,: . ~ , , ~' ' ` '
Claims (2)
1. In a yarn winding apparatus comprising a friction roller capable of being driven and rotatably mounted on a frame in a vertical position; a rotatable package in surface contact with the roller; a substan-tially horizontal layrail; means for reciprocating the layrail longitudinally of the package; an L-shaped arm rotatably mounted to the layrail at the elbow of the arm;
a rotatable disc having a peripheral groove eccentrically mounted to one end of the arm, the disc and the arm being coplanar; a guide means extending substantially the length of the package, the other end of said L-shaped arm being slideably connected to the guide means, the disc being adapted to be rotated by yarn travelling in the peripheral groove of the disc to the package, the improvement com-prising: a dancer roll having a peripheral groove rotat-ably mounted about its axis to the frame by at least one leaf spring attached at one of its ends to the frame and the other to an axle of the dancer roll, the dancer roll being adapted to be rotated by yarn travelling in the peripheral groove of the roll on its way to the rotatable disc, the leaf spring being adapted to allow the dancer roll to move towards and away from the rotatable disc as the dancer roll and the rotatable disc are rotated by travelling yarn.
a rotatable disc having a peripheral groove eccentrically mounted to one end of the arm, the disc and the arm being coplanar; a guide means extending substantially the length of the package, the other end of said L-shaped arm being slideably connected to the guide means, the disc being adapted to be rotated by yarn travelling in the peripheral groove of the disc to the package, the improvement com-prising: a dancer roll having a peripheral groove rotat-ably mounted about its axis to the frame by at least one leaf spring attached at one of its ends to the frame and the other to an axle of the dancer roll, the dancer roll being adapted to be rotated by yarn travelling in the peripheral groove of the roll on its way to the rotatable disc, the leaf spring being adapted to allow the dancer roll to move towards and away from the rotatable disc as the dancer roll and the rotatable disc are rotated by travelling yarn.
2. The apparatus according to Claim 1 wherein there are two leaf springs, one positioned on each side of the dancer roll.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA319,469A CA1113067A (en) | 1979-01-11 | 1979-01-11 | High speed winder for non-extensible yarn |
| EP79303058A EP0013510A1 (en) | 1979-01-11 | 1979-12-28 | High speed winder for non-extensible yarns |
| JP63180A JPS5593775A (en) | 1979-01-11 | 1980-01-09 | Device for winding yarn |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA319,469A CA1113067A (en) | 1979-01-11 | 1979-01-11 | High speed winder for non-extensible yarn |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1113067A true CA1113067A (en) | 1981-11-24 |
Family
ID=4113294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA319,469A Expired CA1113067A (en) | 1979-01-11 | 1979-01-11 | High speed winder for non-extensible yarn |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0013510A1 (en) |
| JP (1) | JPS5593775A (en) |
| CA (1) | CA1113067A (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3122385C2 (en) * | 1980-07-30 | 1986-07-17 | Zinser Textilmaschinen Gmbh, 7333 Ebersbach | Device for winding up yarn |
| EP0128255A1 (en) * | 1983-06-14 | 1984-12-19 | Gabriel Rol | Apparatus and process for making a fur yarn |
| JPS61189060U (en) * | 1985-05-17 | 1986-11-25 | ||
| JP3070141B2 (en) * | 1991-05-20 | 2000-07-24 | チッソ株式会社 | Optically active alkenyl ethylene glycols and method for producing the same |
| AU6748300A (en) * | 1999-09-07 | 2001-04-10 | Corning Incorporated | Passive tension regulator for optical fiber winder |
| DE102009021066A1 (en) * | 2009-05-13 | 2010-11-18 | Oerlikon Textile Gmbh & Co. Kg | Thread storage for a workstation of an open-end spinning machine |
| CN105417280B (en) * | 2015-12-30 | 2018-03-13 | 重庆永富电线电缆有限公司 | A kind of Novel cable hitch frame |
| CN107458927A (en) * | 2016-06-06 | 2017-12-12 | 泰科电子(上海)有限公司 | Tensioning apparatus |
| CN107187946A (en) * | 2017-07-17 | 2017-09-22 | 长兴恒峰纺织有限公司 | Chemical fiber filament tension buffer device |
| CN111874739B (en) * | 2020-08-05 | 2022-03-08 | 大连银路电控设备有限公司 | Full-automatic coiling baling press |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE243833C (en) * | ||||
| DE504064C (en) * | ||||
| GB191012070A (en) * | 1910-05-17 | 1911-04-20 | John Dempster Whyte | Improvements in and in Means used in connection with the Simultaneous Twisting and Winding of Two-fold or other Doubled Yarns. |
| FR610650A (en) * | 1926-02-05 | 1926-09-09 | Const Mecaniques Du Fresnoy Sa | Refinements with cannetières |
| GB387307A (en) * | 1930-06-30 | 1933-02-02 | Schweiter Ag Maschf | A compensating device for twisting frames |
| GB697303A (en) * | 1950-02-23 | 1953-09-16 | Universal Winding Co | Improvements in or relating to winding machines |
| NL207528A (en) * | 1956-05-29 | |||
| FR1265889A (en) * | 1960-05-23 | 1961-07-07 | Saint Gobain | Further training in the manufacture of strands of glass or similar mineral materials |
| CH440901A (en) * | 1965-11-19 | 1967-07-31 | Micafil Ag | Tension regulator for keeping tension forces constant in wires or other thread-like material |
-
1979
- 1979-01-11 CA CA319,469A patent/CA1113067A/en not_active Expired
- 1979-12-28 EP EP79303058A patent/EP0013510A1/en not_active Withdrawn
-
1980
- 1980-01-09 JP JP63180A patent/JPS5593775A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5593775A (en) | 1980-07-16 |
| EP0013510A1 (en) | 1980-07-23 |
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