CA1042289A - Yarn twisting device - Google Patents
Yarn twisting deviceInfo
- Publication number
- CA1042289A CA1042289A CA232,131A CA232131A CA1042289A CA 1042289 A CA1042289 A CA 1042289A CA 232131 A CA232131 A CA 232131A CA 1042289 A CA1042289 A CA 1042289A
- Authority
- CA
- Canada
- Prior art keywords
- flexible tube
- yarn
- tubular mounting
- tube
- bearings
- 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
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
- D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
- D02G1/04—Devices for imparting false twist
- D02G1/08—Rollers or other friction causing elements
-
- 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
- B65H57/12—Tubes
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H7/00—Spinning or twisting arrangements
- D01H7/92—Spinning or twisting arrangements for imparting transient twist, i.e. false twist
- D01H7/923—Spinning or twisting arrangements for imparting transient twist, i.e. false twist by means of rotating devices
-
- 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
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
ABSTRACT
This invention concerns yarn twisting apparatus.
The invention envisages an elongate curved mounting within which a flexible tube is rotatably mounted so that the flexible tube has a curved longitudinal axis.
On passing a yarn through the rotating tube a twist is imparted to the yarn. By this means the twist imparted to the yarn is even and without slip, since all parts of the interior surface of the tube are rotating at the same peripheral speed.
In contrast certain prior arrangements require slip to take place between the yarn and the surface imparting the rotation because different parts of the surface are at different distances from the rotary axis.
This invention concerns yarn twisting apparatus.
The invention envisages an elongate curved mounting within which a flexible tube is rotatably mounted so that the flexible tube has a curved longitudinal axis.
On passing a yarn through the rotating tube a twist is imparted to the yarn. By this means the twist imparted to the yarn is even and without slip, since all parts of the interior surface of the tube are rotating at the same peripheral speed.
In contrast certain prior arrangements require slip to take place between the yarn and the surface imparting the rotation because different parts of the surface are at different distances from the rotary axis.
Description
r-~
lO~Z~89 This invention relates to apparatus for false twisting yarn and comprises improvements in or modifications to the invention forming the subject of the presen-t applicant~s Specification No 1353749.
5, According to one aspect of the present inven-tion yarn twisting apparatus includes a flexible tube rotatably mounted within an elongate curved tubular mounting which constrains the flexible tube to have -a curved longitudinal axis.
10. According to another aspect of the present inven-tion apparatus for twisting yarn includes a flexible tube mounted within a rigid tubular mounting of unitary or multipart form which constrains the flexible tube to have a curved longitudinal axis, 15. means for rotating the flexible tube about its longi-tudinal axis and means for linearly advancing a yarn through the flexible tube whilst it is rotating 80 as to contact the internal wall thereof. ~
Preferably, the rigid tubular mounting is such 20. that the axis of the flexible tube is an involute curve and has a radius of curvature of about 2.5 inches at the receiving end for the yarn gradually increasing to about 3.75 inches at its exit end.
The use of a rigid tubular mounting,-which can effect-25. ively be provided by two or more longitudinal elements, enables the curvature of the flexible tube to be accurately set and for the rigid tubular mounting I merely to be supported adjacent one end.
; Preferably, the tubular mounting has a number ~ 30. of spaced bearings dis~ributed along its length, the ... ~ ~.i ..
~ ~ 2-.. ~.
--\--~Z'~8~ ~
flexible tube being mounted to rotate within the spaced bearings. The spaced bearings conveniently comprise lubricant-impregnated sleeves, for example of sintered phosphor bronze construction. These 5. may be kept lubricated by a wick type of lubricanting device extending along the length of the tubular mounting or they may have felt pads disposed adjacent them to increase the oil available.
The flexible tube may have one end thereof 10. connected to a driving spindle and the flexible tube may have an internal lining of elastomeric material which is received as a push fit over the external surface of the driving spindle. -As in one specific embodiment of the~earlier 15. Patent Specification referred to above, the flexible tube may comprise a helical spring and the internal lining may comprise a resilient sleeve of elastomeric `~
.
material. The elastomeric material is preferably relatively soft. For example it may have a Shore 20. A hardness of 10-50.
Whilst a multi-part tubular mounting is envisaged, ~ where the mounting is of unitary form, it preferably ; has at least one elongated slot therein to enable cooling of the bearings to take place by air flow 25. generated by the rotation of the flexible tube.
For example, there may be two diametrically opposite elongate slots.
. ` .
The invention may be carried into practice in ; a number of ways, but one specific embodiment will - 30. now be described by way of example with reference . . .. ..
~'' .. .. - .
,' .:' ~`. ' '. ' .~ ,;
, . . .. .: . :. . . :
~ ~4228~
to the drawings accompanying the provisional 3 specification, in which:-Figure 1 is a longitudinal cross-section through ~-a false twisting apparatus, accarding to the 5. invention;
Figure 2 illustrates the appara-tus of Figure 1 associated with a heater and other mechanism;
Figure 3 is a side elevation of the apparatus of Figure 1 as viewed in the direction of the arrow 10. A, and Figure 4 is a scrap cross-section of the flexible tube embodied in the apparatus of Figures 1 - 3.
Referring to Figure 1, this shows a mounting plate 10 on which an outer casing 11 for a bearing 15. 12 of a rotating spindle 13 is mounted between a flange 14 of the casing 11 and a nut 15. The spindle ~-13 comprises a hollow tube, the lower end of which carries a pulley 16 for driving by a belt. The upper end 18 of the spindle pro~ects from the casing 11 l 20. in order to transmit a drive to a flexible tube ;~ comprising a helical spring 20 lined with a sleeve 21 of elastomeric material, such as polyurethane elastomer having a shore A harclness of between 10 and 50 and e.g. 30 for fine denier yarn. The 25. rubber and spring are a push fit on the upper end 18 `l of the spindle in order to make a suitable drive -~' connection.
In order to constrain the flexible tube formed by the spring 20 and the sleeve 21 into the curved 30. form shown, they are surrouncled by a rigid tube 22 , ~ .
, : .
`" ,`' ~`- ' : - .. .; ., . ,: . . , , . ~
l~ZZ85~ ~
having a suitable riadius of curvature. The lower end of the rigid -tube 22 in Figure 1 has a sleeve 24 '- ~ ' connected there-to and which has a number of longi~
tudinal slits 26 therein as shown in Figure 3 to ,- ' 5. enable the sleeve 24 to be clamped by a screw clip -, 25 around the upper end of the casing 11. In the ,' construction shown, the tube ?2 is of unitary form having a pair of diametrically opposite cooling ~ ,~
slots 28. It will be appreciated that the rigid 10. tube 22 could equally be formed by a number of peripherally spaced portions such as are formed -, between the slots 28.
' Referring to Figure 1, mounted within the rigid ~ ~
tube 22 at spaced intervals, are four sleeve bearings ~' 15. 30, each of which is formed from sintered phosphor bronze impregnated with a suitable lubricant. The ' bearings may be retained in position in different , ways but in the embodiment shown, they are formed as '',, a push fi~ within the tube 22 and located therein" by ~ 20. external rings 32 which clamp the sides of the tube i, ,l on to the bearings. In the case of the upper bearing ' ", , 30, it is retained in position by one of two olips "' ; 34 which mount an arm 35 for a pulley 36. The bore ~, ,.. , - ,.. ~
~ of the beari,ngs 30 is formed in order to provide , "
~. .
', 25. the best possible bearing for the external surface ,',' ,,, ,, of the spring 2G. For example, the bearings 30 may ~
~ . .
,I have bores which are of larger diameter at their ends ','' '' ' than in a central region. In order to keep the ',, bearings lubricated~ a wick 40 extends between them ';
' 30. and upwardly ~rom a reservoir 42 of lubricant.
:' ' : .,, 5. :.
' Figure 2 illustrates the device shown in Figure 1 assembled in a complete false -twisting -apparatus which includes a package 50, a twist stop and tensioning device 52 which may take the Porm 5. of a yarn ~eeding roller, and a yarn heater 53. The heated yarn leaves the heater and passes through the curved tube illustra-ted in Figure 1 ~hich ; rotates at a speed of, for example, 13,000 r.p.m.
As a result of frictional contact with the elasto-, , .
10. meric lining 21, the yarn is rotated, and as a result of this rotation, a twist is inserted into Z the yarn between the tensioning device 52 and the ;~ twisting tube and is set by the heater 53. The twist is removed as the yarn passes from the tube.
15. The yarn leaving the tube passes a guide 39, around the pulley 36, passes a yarn feeding arrangement 37 ;l and on to a package winder 38. During the passage of the yarn through the friction twisting tube, the -~
~`' yarn tends naturally to take up the substantially . I .
20, shorte~t curvature of this elastomeric sleeve, although the forces involved tend to cause the tube to run slightly offset from the shortest curvature, During rotation of the flexible tube ,Zl heat tends to be generated both in the bearings, by 25, the frictional contact o~ the yarn and the flexing of the tube. This is dissipated by an air flow ~1 . ....
through the slots 28 caused by the outer surface of the spring 20, the turns of which tend to act as cooling vanes.
30. The form of the flexible tube can vary according : "
. ~ .
.,. ,,. ~
~ 4228~
to requirements, For example it may include at its upper end a section of more abrasive-resistant - :
material.
Figure 4 diagrammatically illustrates one ~orm :
5. of a spring 20 and the elastomeric lining 21.
`' f' `' ' ~'';
',..,, ,,'` ,, :.
,1 , ~
. '' , ~ :
. .
,.'': ' ~:
~ , ~. ,;
, I ' ' `.
.,1 - '',, .
' ' . .
`' 7. ' ~:
. ~ " ,.
' "' ' ' : ~
lO~Z~89 This invention relates to apparatus for false twisting yarn and comprises improvements in or modifications to the invention forming the subject of the presen-t applicant~s Specification No 1353749.
5, According to one aspect of the present inven-tion yarn twisting apparatus includes a flexible tube rotatably mounted within an elongate curved tubular mounting which constrains the flexible tube to have -a curved longitudinal axis.
10. According to another aspect of the present inven-tion apparatus for twisting yarn includes a flexible tube mounted within a rigid tubular mounting of unitary or multipart form which constrains the flexible tube to have a curved longitudinal axis, 15. means for rotating the flexible tube about its longi-tudinal axis and means for linearly advancing a yarn through the flexible tube whilst it is rotating 80 as to contact the internal wall thereof. ~
Preferably, the rigid tubular mounting is such 20. that the axis of the flexible tube is an involute curve and has a radius of curvature of about 2.5 inches at the receiving end for the yarn gradually increasing to about 3.75 inches at its exit end.
The use of a rigid tubular mounting,-which can effect-25. ively be provided by two or more longitudinal elements, enables the curvature of the flexible tube to be accurately set and for the rigid tubular mounting I merely to be supported adjacent one end.
; Preferably, the tubular mounting has a number ~ 30. of spaced bearings dis~ributed along its length, the ... ~ ~.i ..
~ ~ 2-.. ~.
--\--~Z'~8~ ~
flexible tube being mounted to rotate within the spaced bearings. The spaced bearings conveniently comprise lubricant-impregnated sleeves, for example of sintered phosphor bronze construction. These 5. may be kept lubricated by a wick type of lubricanting device extending along the length of the tubular mounting or they may have felt pads disposed adjacent them to increase the oil available.
The flexible tube may have one end thereof 10. connected to a driving spindle and the flexible tube may have an internal lining of elastomeric material which is received as a push fit over the external surface of the driving spindle. -As in one specific embodiment of the~earlier 15. Patent Specification referred to above, the flexible tube may comprise a helical spring and the internal lining may comprise a resilient sleeve of elastomeric `~
.
material. The elastomeric material is preferably relatively soft. For example it may have a Shore 20. A hardness of 10-50.
Whilst a multi-part tubular mounting is envisaged, ~ where the mounting is of unitary form, it preferably ; has at least one elongated slot therein to enable cooling of the bearings to take place by air flow 25. generated by the rotation of the flexible tube.
For example, there may be two diametrically opposite elongate slots.
. ` .
The invention may be carried into practice in ; a number of ways, but one specific embodiment will - 30. now be described by way of example with reference . . .. ..
~'' .. .. - .
,' .:' ~`. ' '. ' .~ ,;
, . . .. .: . :. . . :
~ ~4228~
to the drawings accompanying the provisional 3 specification, in which:-Figure 1 is a longitudinal cross-section through ~-a false twisting apparatus, accarding to the 5. invention;
Figure 2 illustrates the appara-tus of Figure 1 associated with a heater and other mechanism;
Figure 3 is a side elevation of the apparatus of Figure 1 as viewed in the direction of the arrow 10. A, and Figure 4 is a scrap cross-section of the flexible tube embodied in the apparatus of Figures 1 - 3.
Referring to Figure 1, this shows a mounting plate 10 on which an outer casing 11 for a bearing 15. 12 of a rotating spindle 13 is mounted between a flange 14 of the casing 11 and a nut 15. The spindle ~-13 comprises a hollow tube, the lower end of which carries a pulley 16 for driving by a belt. The upper end 18 of the spindle pro~ects from the casing 11 l 20. in order to transmit a drive to a flexible tube ;~ comprising a helical spring 20 lined with a sleeve 21 of elastomeric material, such as polyurethane elastomer having a shore A harclness of between 10 and 50 and e.g. 30 for fine denier yarn. The 25. rubber and spring are a push fit on the upper end 18 `l of the spindle in order to make a suitable drive -~' connection.
In order to constrain the flexible tube formed by the spring 20 and the sleeve 21 into the curved 30. form shown, they are surrouncled by a rigid tube 22 , ~ .
, : .
`" ,`' ~`- ' : - .. .; ., . ,: . . , , . ~
l~ZZ85~ ~
having a suitable riadius of curvature. The lower end of the rigid -tube 22 in Figure 1 has a sleeve 24 '- ~ ' connected there-to and which has a number of longi~
tudinal slits 26 therein as shown in Figure 3 to ,- ' 5. enable the sleeve 24 to be clamped by a screw clip -, 25 around the upper end of the casing 11. In the ,' construction shown, the tube ?2 is of unitary form having a pair of diametrically opposite cooling ~ ,~
slots 28. It will be appreciated that the rigid 10. tube 22 could equally be formed by a number of peripherally spaced portions such as are formed -, between the slots 28.
' Referring to Figure 1, mounted within the rigid ~ ~
tube 22 at spaced intervals, are four sleeve bearings ~' 15. 30, each of which is formed from sintered phosphor bronze impregnated with a suitable lubricant. The ' bearings may be retained in position in different , ways but in the embodiment shown, they are formed as '',, a push fi~ within the tube 22 and located therein" by ~ 20. external rings 32 which clamp the sides of the tube i, ,l on to the bearings. In the case of the upper bearing ' ", , 30, it is retained in position by one of two olips "' ; 34 which mount an arm 35 for a pulley 36. The bore ~, ,.. , - ,.. ~
~ of the beari,ngs 30 is formed in order to provide , "
~. .
', 25. the best possible bearing for the external surface ,',' ,,, ,, of the spring 2G. For example, the bearings 30 may ~
~ . .
,I have bores which are of larger diameter at their ends ','' '' ' than in a central region. In order to keep the ',, bearings lubricated~ a wick 40 extends between them ';
' 30. and upwardly ~rom a reservoir 42 of lubricant.
:' ' : .,, 5. :.
' Figure 2 illustrates the device shown in Figure 1 assembled in a complete false -twisting -apparatus which includes a package 50, a twist stop and tensioning device 52 which may take the Porm 5. of a yarn ~eeding roller, and a yarn heater 53. The heated yarn leaves the heater and passes through the curved tube illustra-ted in Figure 1 ~hich ; rotates at a speed of, for example, 13,000 r.p.m.
As a result of frictional contact with the elasto-, , .
10. meric lining 21, the yarn is rotated, and as a result of this rotation, a twist is inserted into Z the yarn between the tensioning device 52 and the ;~ twisting tube and is set by the heater 53. The twist is removed as the yarn passes from the tube.
15. The yarn leaving the tube passes a guide 39, around the pulley 36, passes a yarn feeding arrangement 37 ;l and on to a package winder 38. During the passage of the yarn through the friction twisting tube, the -~
~`' yarn tends naturally to take up the substantially . I .
20, shorte~t curvature of this elastomeric sleeve, although the forces involved tend to cause the tube to run slightly offset from the shortest curvature, During rotation of the flexible tube ,Zl heat tends to be generated both in the bearings, by 25, the frictional contact o~ the yarn and the flexing of the tube. This is dissipated by an air flow ~1 . ....
through the slots 28 caused by the outer surface of the spring 20, the turns of which tend to act as cooling vanes.
30. The form of the flexible tube can vary according : "
. ~ .
.,. ,,. ~
~ 4228~
to requirements, For example it may include at its upper end a section of more abrasive-resistant - :
material.
Figure 4 diagrammatically illustrates one ~orm :
5. of a spring 20 and the elastomeric lining 21.
`' f' `' ' ~'';
',..,, ,,'` ,, :.
,1 , ~
. '' , ~ :
. .
,.'': ' ~:
~ , ~. ,;
, I ' ' `.
.,1 - '',, .
' ' . .
`' 7. ' ~:
. ~ " ,.
' "' ' ' : ~
Claims (15)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A yarn twisting apparatus including a flexible tube rotatably mounted within an elongate rigid curved tubular mounting which constrains the flexible tube to have a curved longitudinal axis.
2. Apparatus for twisting yarn including a flexible tube mounted within a tubular mounting of rigid unitary or multipart form which constrains the flexible tube to have a curved longitudinal axis, means for rotating the flex-ible tube about its longitudinal axis and means for linearly advancing a yarn through and in contact with the flexible tube whilst it is rotating.
3. Yarn twisting apparatus as claimed in claim 1 or claim 2,in which the rigid tubular mounting is supported merely adjacent one end.
4. Apparatus as claimed in claim 1 or claim 2,in which the tubular mounting supports the flexible tube with the axis of the latter forming an involute curve.
5. Apparatus as claimed in claim 2,in which the tubular mounting has a number of bearings within it and distributed along its length, the flexible tube being mounted to rotate within the bearings.
6. Apparatus as claimed in claim 5, in which the bearings comprise lubricant-impregnated sintered sleeves.
7. Apparatus as claimed in claim 6, in which the sleeves are lubricated by a wick type of lubricating device extending along the length of the tubular mounting.
8. Apparatus as claimed in claim 2 in which the flexible tube has one end thereof connected to a driving spindle.
9. Apparatus as claimed in claim 8, in which the flexible tube has an internal lining of elastomeric material which has a push fit over the external surface of the driving spindle.
10. Apparatus as claimed in claim 9, in which the flexible tube com-prises a helical spring and the internal lining comprises a resilient sleeve of elastomeric material.
11. Apparatus as claimed in claim 10, in which the elastomeric material is a polyurethane elastomer.
12. Apparatus as claimed in claim 9 or claim 10, in which the elastomer-ic material has a Shore A hardness of between 10 and 50.
13. Apparatus as claimed in claim 1 or claim 2, in which the tubular mounting is formed from a number of longitudinal strips.
14. Apparatus as claimed in claim 5, wherein the tubular mounting is of unitary form and has at least one elongate slot therein to enable cooling of the bearings to take place by air flow generated by the rotation of the flexible tube.
15. Apparatus as claimed in claim 14, including two elongated slots diametrically opposed to one another.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3288574A GB1512373A (en) | 1974-07-25 | 1974-07-25 | Yarn twisting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1042289A true CA1042289A (en) | 1978-11-14 |
Family
ID=10345499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA232,131A Expired CA1042289A (en) | 1974-07-25 | 1975-07-24 | Yarn twisting device |
Country Status (3)
| Country | Link |
|---|---|
| CA (1) | CA1042289A (en) |
| GB (1) | GB1512373A (en) |
| IE (1) | IE41274B1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU8554382A (en) * | 1981-07-20 | 1983-01-27 | Officine Savio S.P.A. | Compensator device |
| CN102978760A (en) * | 2012-12-20 | 2013-03-20 | 浙江兰宝毛纺集团有限公司 | False twister device of flyer roving frame |
| DE102015001412B3 (en) * | 2015-02-06 | 2016-04-21 | ITA Technologietransfer GmbH | A method of feeding a staple fiber ribbon to a laying head, textile machine and method of retrofitting a textile machine |
| CN105752769B (en) * | 2016-04-26 | 2017-11-17 | 长飞光纤光缆股份有限公司 | A kind of low stress optical cable take-up and pay-off device |
-
1974
- 1974-07-25 GB GB3288574A patent/GB1512373A/en not_active Expired
-
1975
- 1975-07-23 IE IE165375A patent/IE41274B1/en unknown
- 1975-07-24 CA CA232,131A patent/CA1042289A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1512373A (en) | 1978-06-01 |
| IE41274L (en) | 1976-01-25 |
| IE41274B1 (en) | 1979-11-21 |
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