CN102766997A - Method for controlling twist redistribution - Google Patents
Method for controlling twist redistribution Download PDFInfo
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- CN102766997A CN102766997A CN2012102751025A CN201210275102A CN102766997A CN 102766997 A CN102766997 A CN 102766997A CN 2012102751025 A CN2012102751025 A CN 2012102751025A CN 201210275102 A CN201210275102 A CN 201210275102A CN 102766997 A CN102766997 A CN 102766997A
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Abstract
The invention discloses a method for controlling twist redistribution. According to the invention, a back zone force application method is adiopted to apply external force on a strip located in a drawing back zone, a force application point is located on the strip surface of the drawing back zone, component force is produced by the applied external force in a vertical direction of the strip surface of the drawing back zone, a stable frictional force zone is provided for the position of the force application point, the strip is not easy to turn over, simultaneously, compactness of the strip can be effectively improved, twist redistribution can be effectively avoided, and resultant yarn levelness is improved.
Description
Technical field
The invention belongs to the ring spinning technical field, relate to a kind of method that turn heavily distributes of controlling, particularly relate to a kind of method that the control turn heavily distributes when the first break draft district adopts than the high draft multiple on ring throstle.
Background technology
The RING SPINNING technology is the most a kind of spinning technique of present domestic and international application; Drafting system is one of most important components of fine spining machine work; Its coarse sand or strip with feeding is taken out the finished product spun yarn that long drawing-down becomes to have certain special number uniformly, thereby ring throstle involves the run stability of system and yarn quality and the output that the drawing-off homogeneity will directly have influence on spun yarn.Improvement to the conventional spinning frame drafter also is one of the most popular research direction in the field of spinning at present.
At present, general fine spining machine all adopts three roller double belt drafting mechanisms, and it comprises two draw zones: proparea drawing-off and back area draft, total draft multiple are generally about 50 times.In these two draw zones, the proparea is owing to adopt two cushion rubber drawing-offs, and the controlling fiber ability is strong, thereby the main forward district of total draft multiple bears, and the drawing-off ability is generally 20 ~ 30 times; And in the traditional back zone straight line drawing-off form of fine spining machine; Adopt simple roller draft, the center friction field a little less than, often by changing roving twist and regulating the back zone and space to come the motion of controlling fiber; Back zone drafting multiple is generally less than 1.4 times, and this is unfavorable to the total draft that improves fine spining machine.When the first break draft multiple surpasses 1.5 times or feeding rove turn when too much; Not only the turn loss increases, and because sliver is bearing bigger tension force, thickness takes place sliver everywhere changes; Turn on the sliver will reverse and moves forward along hand of helix, sometimes even sliver takes place stir.Like this, just make a large amount of turns concentrate on the sliver of system near the jaw forward, produced the turn phenomenon that heavily distributes.The serious turn phenomenon counter extensioin that heavily distributes is paid no attention to, and draw zone middle part friction field intensity is descended suddenly, impels fiber to shift to an earlier date speed change, worsens into sliver and does.
The low main cause of back area draft ability has two aspects.The one, for ease of practical operation, the general structure in back zone is comparatively simple, a little less than the control to fiber, and the 2nd, the rove of feeding itself has certain twist, thereby if it is directly carried out bigger drawing-off, it is irregular to be easy to generate drawing-off, has a strong impact on yarn quality.The measure that improves the back area draft ability at present also mainly is to launch around these two aspects, is main to improve first aspect wherein, also promptly takes certain measure to increase the control ability of back zone to fiber.For example, the method etc. that adopt to add the apron structure in the back zone.Wherein, A kind of three roller three-aprons and three rollers, four tape drawing mechanisms are disclosed respectively at Chinese patent " device that involves that is used for high-count worsted machine " (application number 96107383) and " fine spining machine four tape drawing mechanisms " (application number 012439010); Adopt the apron structure to preferably resolve the weak problem of back area draft ability of three roller form drafters, make the total draft multiple can bring up to 100 in theory; In Chinese patent " fine spining machine four apron high draft devices " (application number 200520073617.2), disclose a kind of four apron high draft mechanisms that are used for fine spining machine, the total draft multiple has been brought up to 150.Said method mainly is to adopt the back zone to add the apron structure to improve the fiber control to be improved the back area draft ability then to a certain extent, but this kind method makes the back plot structure comparatively complicated on the one hand, is not easy to the installation of real system; On the other hand, add the apron structure in the back zone, though increased control to fiber; But speed change point only concentrates near the apron periphery; This is comparatively unfavorable than high draft for the rove that itself has certain twist, causes drawing-off irregular easily, has a strong impact on yarn quality.Therefore, this kind method also has larger distance apart from the use of reality, has only when good, the bar of rove regularity of feeding and does when even, can adopt this method to realize bigger back zone drafting multiple.
Therefore concerning the back zone of simple roller draft, need prevent heavily the distribute generation of phenomenon of turn.To increase the control of back zone on the one hand, should make speed change point concentrate and remain on as far as possible the middle part, back zone on the other hand, to keep drawing-off even to fiber.
Summary of the invention
To prior art problems, the present invention provides a kind of method that turn heavily distributes of controlling, and takes back zone application of force method; Apply an external force for the yarn be in the drawing-off back zone, the point of application is in the yarn surface in first break draft district, and institute's external force of executing is at a component of vertical direction generation on the yarn surface in first break draft district; For point of application place provides a stable friction field; Can effectively increase the tightness of yarn simultaneously so that yarn be difficult for to produce and to stir, effectively prevent heavily the distribute generation of phenomenon of turn; Improve into sliver and do, back zone drafting multiple can be brought up to 1.5-2.5 doubly.
The method that control turn of the present invention heavily distributes; The rove yarn is fed after twist into spun yarn after the drawing-off effect of draw zone by horn mouth; First break draft district and front draft zone are distinguished in said drawing-off, and the district applies active force in first break draft, and said active force produces pressure to the yarn through the point of application
P, this pressure
PYarn to motion produces frictional resistance
f, said frictional force
fLess than the yarn drafting force
F, make point of application place increase a friction field, guarantee that yarn is difficult for generation and stirs, increase the control ability of back zone to fiber.
Preferably; The direction of described active force is seen as around radially arbitrarily angled of yarn from the yarn radial section; Make yarn under the effect of applying power; Control speed change point is moved to application point side neighbouring by original drawing rollers, realizes the high draft uniformly and effectively to the rove with certain twist.
Aforesaid a kind of method that turn heavily distributes of controlling, the direction of described active force are seen as the angle theta of direction and yarn surface vertical line of active force smaller or equal to 45 ° from the yarn axial cross section.On the one hand can so that institute's external force that applies on the yarn surface vertical line direction enough component is arranged is that yarn provides stable friction field, on the other hand the component of the external force that applies on other directions provide possible for being optimized to yarn quality.
Aforesaid a kind of method that turn heavily distributes of controlling, the direction of described active force be perpendicular to yarn, thereby applying external force is converted into the pressure that acts on point of application yarn, for yarn provides stable friction field.
Aforesaid a kind of method that turn heavily distributes of controlling, described active force are positive pressure or reverse suction.Under the effect of positive pressure or reverse suction, the tightness of yarn increases, and can effectively prevent heavily the distribute generation of phenomenon of turn, improves into sliver and does.
In the practical implementation process, because the rove that fed is different, in the present invention, the big I of institute's positive pressure of executing or reverse suction is regulated within the specific limits, and satisfied<i >0<P<F</i>, produced simultaneously frictional resistance<i >0<F<F</i>, also be
<i >μ P<F</i>, wherein<i >μ</i>Be coefficient of friction,,, improve yarn quality to optimize Process configuration by force application apparatus that is adopted and yarn decision.
Aforesaid a kind of method that turn heavily distributes of controlling, the drafting multiple in said first break draft district is 1.5～2.5 times, thereby effectively improves back zone drafting multiple, improves the total draft multiple then.
A kind of method that turn heavily distributes of controlling of the present invention has increased the control of back zone to fiber on the one hand, for point of application place provides a stable friction field, makes yarn be difficult for producing and stirs, in positive pressure
PEffect under, the tightness of yarn increases, and can effectively prevent heavily the distribute generation of phenomenon of turn, improves into sliver and does; Can make speed change point concentrate and remain on as far as possible the middle part, back zone on the other hand, to keep drawing-off even.
Description of drawings
Fig. 1 is that the present invention applies positive pressure work sketch map;
Fig. 2 is that external force that the present invention applies produces positive pressure effect sketch map to point of application yarn;
Fig. 3 is a point of application force diagram of the present invention;
Fig. 4 is a point of application force direction sketch map of the present invention;
Fig. 5 is a point of application active force incline direction sketch map of the present invention;
Wherein 1 is the rove yarn, the 2nd, and fibre bundle, the 3rd, the point of application, the 4th, yarn surface vertical line, I is the first break draft district, II is the front draft zone,
PBe to apply active force,
fBe frictional resistance,
FIt is drafting force.
The specific embodiment
Below in conjunction with the specific embodiment, further set forth the present invention, embodiment only be used to the present invention is described and be not used in the restriction scope of the present invention.
With the textile combing 14.6tex of EJM128K type Spinning Frame yarn is example; Quantitatively for 4.83g/10m, twist factor be 144 rove yarn 1 by the horn mouth feeding, the spun yarn twist factor is set at 380, back zone drafting multiple is set at 1.88; The total draft multiple is set at 33.03; Do not exert pressure, after the drawing-off effect of first break draft district I and front draft zone II, twist into spun yarn 3, yarn quality is as shown in table 1.
With the textile combing 14.6tex of EJM128K type Spinning Frame yarn is example; Be that 144 rove yarn 1 is fed by horn mouth quantitatively for 4.83g/10m, twist factor; The spun yarn twist factor is set at 380, and II adopts the location yarn guiding wheel that is driven by rolling bearing that is installed on the reel cage to apply positive pressure downwards, pressure 10N/ingot in the first break draft district; Back zone drafting multiple is set at 1.88; The total draft multiple is set at 33.03, after the drawing-off effect of first break draft district I and front draft zone II, twists into spun yarn 3, and yarn quality is as shown in table 1.
Embodiment 3
Still with the textile combing 14.6tex of EJM128K type Spinning Frame yarn, quantitatively for 4.83g/10m, twist factor be 144 rove yarn 1 by the horn mouth feeding, the spun yarn twist factor is set at 380; Through adopt the punching upper leather ring to cooperate to have at the medium rubber roller place hollow structure on pin; And the downside pin base plane contains air outlet, and the middle roller rear end adds corresponding downside pin simultaneously, forms the back zone jaw; The negative pressure air-suction channel is contained on the downside pin top of hollow; The negative-pressure air-flow that applies is 3000Pa, and the air outlet of negative-pressure air-flow through the hollow downside pin and the hole on the punching upper leather ring act on the yarn at jaw place, then the yarn through the point of application 4 are produced buffer brake
P, this buffer brake
PYarn to motion produces frictional resistance
f, for yarn provides stable friction field.Back zone drafting multiple is set at 1.88, and the total draft multiple is set at 33.03, after the drawing-off effect of first break draft district I and front draft zone II, twists into spun yarn 3, and yarn quality is as shown in table 1.
Table 1 comparison on Yarn
Claims (6)
1. control the method that turn heavily distributes for one kind; Be that the rove yarn is fed after twist into spun yarn after the drawing-off effect of draw zone by horn mouth; First break draft district and front draft zone are distinguished in said drawing-off; It is characterized in that: the district applies active force to yarn in said first break draft, and the frictional resistance that said active force produces yarn is less than the size of yarn drafting force.
2. a kind of method that turn heavily distributes of controlling as claimed in claim 1 is characterized in that: the direction of described active force is seen as around radially arbitrarily angled of yarn from the yarn radial section.
3. a kind of method that turn heavily distributes of controlling as claimed in claim 1 is characterized in that: the direction of described active force is seen as the angle of direction and yarn surface vertical line of active force smaller or equal to 45 ° from the yarn axial cross section.
4. a kind of method that turn heavily distributes of controlling as claimed in claim 1, it is characterized in that: the direction of described active force is perpendicular to yarn.
5. like each described a kind of method that turn heavily distributes of controlling of claim 1-4, it is characterized in that: described active force is positive pressure or reverse suction.
6. a kind of method that turn heavily distributes of controlling as claimed in claim 5, it is characterized in that: the drafting multiple in said first break draft district is 1.5～2.5 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102751025A CN102766997A (en) | 2012-08-03 | 2012-08-03 | Method for controlling twist redistribution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102751025A CN102766997A (en) | 2012-08-03 | 2012-08-03 | Method for controlling twist redistribution |
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|---|---|
| CN102766997A true CN102766997A (en) | 2012-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012102751025A Pending CN102766997A (en) | 2012-08-03 | 2012-08-03 | Method for controlling twist redistribution |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103374774A (en) * | 2013-08-01 | 2013-10-30 | 江南大学 | spinning method of multi-component multi-segment color yarns |
| CN107190370A (en) * | 2017-07-26 | 2017-09-22 | 江苏凯宫机械股份有限公司 | The adjustable drawing-off hitch gear of intelligent combing machine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1948574A (en) * | 2006-09-25 | 2007-04-18 | 朱鹏 | High power drawing device of ring throstle |
| CN101307515A (en) * | 2008-07-09 | 2008-11-19 | 东台纺织机械有限责任公司 | High power drafting device for ring spinning frame |
-
2012
- 2012-08-03 CN CN2012102751025A patent/CN102766997A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1948574A (en) * | 2006-09-25 | 2007-04-18 | 朱鹏 | High power drawing device of ring throstle |
| CN101307515A (en) * | 2008-07-09 | 2008-11-19 | 东台纺织机械有限责任公司 | High power drafting device for ring spinning frame |
Non-Patent Citations (2)
| Title |
|---|
| 唐文辉: ""棉纺高效工艺机理分析"", 《2006年全国现代纺纱技术研讨会论文集》, 31 December 2006 (2006-12-31) * |
| 唐文辉: ""环锭细纱机现代牵伸装置的技术进步与发展"", 《2006中国棉纺织行业技术进步研讨会论文集》, 31 December 2006 (2006-12-31) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103374774A (en) * | 2013-08-01 | 2013-10-30 | 江南大学 | spinning method of multi-component multi-segment color yarns |
| CN107190370A (en) * | 2017-07-26 | 2017-09-22 | 江苏凯宫机械股份有限公司 | The adjustable drawing-off hitch gear of intelligent combing machine |
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Application publication date: 20121107 |