CN109750402B

CN109750402B - Six-channel hollow spindle fancy yarn forming device and method

Info

Publication number: CN109750402B
Application number: CN201910208127.5A
Authority: CN
Inventors: 刘曰兴; 薛元; 王玉平; 张国清; 刘立霞; 莫振恩; 刘洪波
Original assignee: Jiangnan University; Yuyue Home Textile Co Ltd
Current assignee: Jiangnan University; Yuyue Home Textile Co Ltd
Priority date: 2019-03-13
Filing date: 2019-03-19
Publication date: 2023-11-10
Anticipated expiration: 2039-03-19
Also published as: CN109750402A

Abstract

The invention provides a six-channel hollow spindle fancy yarn forming device and a method, wherein the yarn forming device comprises a first channel, a second channel, a third channel, a fourth channel, a fifth channel and a sixth channel; forming a fancy yarn main body after the first twisting points of the first to sixth component yarns are alternately twisted; a hollow spindle is arranged at the second twisting point, and the seventh component yarn on the hollow spindle is intersected with the fancy yarn main body and coats the fancy yarn main body. The invention realizes one-step spinning of fancy yarn by alternating drafting, alternating twisting and cladding processes through a one-step method, and simultaneously realizes on-line changes of colors and forms of bamboo joints, large belly, knots, circles and braids of the fancy yarn by technical means of regulating and controlling the speed of the cooperative feeding twisting points of the fancy yarn and the core yarn, regulating and controlling the linear density and blending ratio of the fancy yarn, regulating and controlling the twist of the core yarn, regulating and controlling the switching of the core yarn and the fancy yarn, and the like, thereby expanding new varieties of fancy yarn.

Description

Six-channel hollow spindle fancy yarn forming device and method

Technical Field

The invention relates to the technical field of spinning in textile engineering, in particular to a six-channel hollow spindle fancy yarn forming device and method.

Background

The hollow spindle spinning machine is used for producing fancy yarn by a two-step method, wherein the first step is that core yarn, decorative yarn and solid yarn are spun respectively; secondly, false twisting is carried out on the core yarns and the decoration yarns fed at different speeds by using a hollow spindle device, the decoration yarns are twisted on the core yarns to form knots, rings, braids and other patterns by overfeeding the core yarns, and then the formed patterns are bound and fixed by using the fixed yarns unreeled from the hollow spindle to form the hollow spindle fancy yarns. The main problems of producing fancy yarn by a hollow spindle spinning machine are as follows:

1) The change of the color of the fancy yarn cannot be regulated and controlled when the fancy yarn is spun by the hollow spindle: in order to realize the color change of fancy yarns, one is to regulate and control the mutual wrapping relation among the decorative yarns, the core yarns and the fixed yarns, and the other is to regulate and control the color of the decorative yarns. The traditional hollow spindle spinning machine for producing fancy yarn does not have a means for regulating and controlling the mutual wrapping relation among the decorative yarn, the core yarn and the fixed yarn, and the color of the decorative yarn cannot be regulated and controlled, so that the color change of the fancy yarn cannot be regulated and controlled;

2) The size and color of knots, loops and braids cannot be regulated and controlled when the hollow spindle spins fancy yarns: the hollow spindle fancy yarn comprises three components (core yarn, decorative yarn and solid yarn), wherein the decorative yarn is a main body for forming fancy yarn knots, rings and braids, and the traditional hollow spindle spinning machine cannot regulate the thickness and color change of the decorative yarn on line, so that the size and color change of knots, rings and braids cannot be regulated;

3) When the hollow spindle spins the three-thread fancy yarn comprising (core yarn + fancy yarn + solid yarn), only one fancy yarn and one core yarn can be simply combined, and multiple combination modes of a plurality of fancy yarns and a plurality of core yarns can not be realized, so that the on-line regulation and control of the combination modes of the fancy yarn and the core yarn can not be realized.

4) The change of the coating ratio of the core yarn, the decorative yarn and the solid yarn cannot be regulated and controlled when the hollow spindle spins the fancy yarn: when a three-thread fancy yarn including (core yarn+decorative yarn+solid yarn) is spun by a hollow spindle, a regulating means is absent in the process of twisting the core yarn and the decorative yarn and then coating the yarn with the solid yarn, so that the change of the coating ratio of the core yarn, the decorative yarn and the solid yarn cannot be regulated on line.

5) Low efficiency, high production cost, etc.

Because the hollow spindle spinning machine has the problems, in the spinning process of fancy yarns, the wrapping structure, the shape, the color, the style and the hand feeling of the fancy yarns are difficult to change on line through the regulation and control of spinning equipment and spinning technology, and the requirements of the fancy yarn clothing fabric with various shapes, rich and fine colors and flexible front guard style cannot be met.

Disclosure of Invention

The invention aims to provide a device for six-channel hollow spindle spinning fancy yarn and a one-step forming method, which combine decorative yarn, core yarn and solid yarn into a complex fancy yarn comprising a knot, a loop, a braid and other combined flower type yarns through alternating drafting, cooperative conveying, alternating twisting, cladding and other processes so as to solve at least one technical problem in the prior art.

In order to solve the technical problems, the invention provides a six-channel hollow spindle fancy yarn forming device, which comprises a first channel for passing a first component yarn, a second channel for passing a second component yarn, a third channel for passing a third component yarn, a fourth channel for passing a fourth component yarn, a fifth channel for passing a fifth component yarn and a sixth channel for passing a sixth component yarn;

the first channel is sequentially provided with a first back roller, a first middle roller, a third front roller, a first twisting point and a second twisting point;

the second channel is sequentially provided with a second back roller, a second middle roller, a first front roller, the first twisting point and the second twisting point;

the third channel is sequentially provided with a third rear roller, a third middle roller, a second front roller, the first twisting point and the second twisting point;

a fourth rear roller, a fourth middle roller, the second front roller, the first twisting point and the second twisting point are sequentially arranged on the fourth channel;

a fifth rear roller, a fifth middle roller, the first front roller, the first twisting point and the second twisting point are sequentially arranged on the fifth channel;

A third front roller, the first twisting point and the second twisting point are sequentially arranged on the sixth channel;

the area between the rear roller, the middle roller and the front roller on the channel is a drafting area, the first front roller, the second front roller, the third front roller and the first twisting point form an alternate twisting triangular area, and the first front roller, the second front roller and the third front roller respectively and independently move to respectively introduce corresponding component yarns into the alternate twisting triangular area;

one or a plurality of yarns of the first component yarn, the second component yarn, the third component yarn, the fourth component yarn, the fifth component yarn and/or the sixth component yarn form a fancy yarn main body after being alternately twisted by first twisting points;

the second twisting point is provided with a hollow spindle, the fancy yarn main body passes through the hollow spindle, the hollow spindle rotates rapidly, and the seventh component yarn on the hollow spindle is intersected with the fancy yarn main body and coats the fancy yarn main body.

Further, the yarn winding device also comprises a yarn bobbin, wherein the yarn bobbin is sleeved on the hollow spindle and synchronously rotates along with the hollow spindle, and the seventh component yarn is wound on the yarn bobbin.

Further, the hollow spindle includes a false twister for twisting the fancy yarn body.

The invention breaks through the technical bottleneck of hollow spindle spinning in the aspect of fancy yarn forming, realizes the one-step spinning of fancy yarns (comprising core yarns, ornamental yarns and solid yarns) by carrying out alternating drafting, cooperative output, alternating twisting and cladding processes through a one-step method, and simultaneously realizes the online change of the colors and the forms of fancy yarn bamboo joints, large belly, knots, circles and braids by regulating and controlling the output speed of the ornamental yarns and the core yarns, the linear density and blending ratio of the ornamental yarns, the twist of the core yarns, the switching of the core yarns and the ornamental yarns and other technical means, and expands new varieties of fancy yarns.

Further, the first back roller and the first middle roller are connected through a first transmission gear set, and the first transmission gear set is used for keeping the traction ratio (linear velocity ratio) between the first middle roller and the first back roller constant and not more than 1.4;

the second rear roller and the second middle roller are connected through a second transmission gear set, and the second transmission gear set is used for keeping the traction ratio (linear velocity ratio) between the second middle roller and the second rear roller constant and not more than 1.4;

the third rear roller and the third middle roller are connected through a third transmission gear set, and the third transmission gear set is used for keeping the traction ratio (linear velocity ratio) between the third middle roller and the third rear roller constant and not more than 1.4;

The fourth rear roller and the fourth middle roller are connected through a fourth transmission gear set, and the fourth transmission gear set is used for keeping the traction ratio (linear velocity ratio) between the fourth middle roller and the fourth rear roller constant and not more than 1.4;

the fifth back roller and the fifth middle roller are connected through a fifth transmission gear set, and the fifth transmission gear set is used for keeping the traction ratio (linear velocity ratio) between the fifth middle roller and the fifth back roller constant and not more than 1.4.

In the first to five channels, a first-stage drafting unit (namely a first drafting zone or a rear zone) is formed between a middle roller and a rear roller, and a second-stage drafting unit (namely a second drafting zone or a front zone) is formed by a front roller and the middle roller; in the same channel,The speed ratio of the rear roller is constant and less than 1.4, and the speed ratio is synchronously changed relative to the front roller in the channel, and the speed ratio of the middle roller and the rear roller in different channels is alternately changed relative to the front roller, so that the alternating drafting of five groups of roving is realized. Of particular importance, the first draft is pre-draft, the first draft ratio e _h The constant C is the constant draft, the draft ratio e of the first-order draft _h The number of times C is less than or equal to 1.4, the continuity of the roving can be ensured, and the drafting singular point can not be generated in the first drafting zone. Meanwhile, the fiber in the roving can be straightened, tensioned and oriented in the pre-drafting process, so that the preparation of sliding in the main drafting process is finished, the breakage rate or the singular point rate in the main drafting process is reduced, the drafting and twisting process is more stable, and the labor intensity of workers is greatly reduced.

And an upper leather roller is correspondingly arranged above each rear roller, each middle roller and each front roller, and the upper leather roller is matched with the rollers below to clamp yarns.

Preferably, an upper leather roller is correspondingly arranged above the middle roller on the same channel in the first channel, the second channel and the third channel, and the yarn forming device further comprises an upper leather ring sleeved on the upper pin and the middle roller and keeping synchronous movement with the middle roller, and a lower leather ring sleeved on the lower pin and the middle roller and keeping synchronous movement with the middle roller; the distance between the holding jaws of the upper leather collar and the lower leather collar and the jaw line of the front roller is less than 3mm.

Two-stage drafting e _q For dynamic main drafting, the speed of the middle roller is changed relative to the front roller, when the blending ratio K=0% of one component yarn in the first channel, the second channel or the third channel, the secondary drafting ratio e of the channel yarn _q When = infinity, the channel yarn forms a drafting singular point in the second drafting zone, the distance delta between the drafting singular point and the front roller jaw is less than or equal to 3mm (the gauge of the back roller and the middle roller is generally larger than 25mm in the prior art, the drafting singular point positions in the first drafting zone are randomly distributed between the middle roller and the back roller, when the drafting singular point is more than 3mm away from the middle roller jaw, the time for the drafting singular point to be fed into the middle roller jaw again has an uncertain factor, if the matching is poor, either coarse details are generated or spinning broken ends are caused Making the spinning an unstable process, affecting the reliability of the spinning and the quality of the finished yarn). When K is increased gradually, along with synchronous starting of the rear roller and the middle roller, the whisker held by the upper leather collar and the lower leather collar is instantaneously fed into a jaw of the front roller to carry out secondary drafting, so that the drafting singular point in the secondary drafting zone does not influence the stability of spinning.

Further, the sixth channel further includes a drawing roller, where the drawing roller, the third front roller, the first twisting point and the second twisting point are sequentially arranged.

Further, the device also comprises a rear roller shaft and a middle roller shaft;

in the circumferential direction of the rear roller shaft, the first rear roller is sleeved on the rear roller shaft in a relatively fixed manner (for example, by a key manner), and the second rear roller, the third rear roller, the fourth rear roller and the fifth rear roller are sleeved on the rear roller shaft in a relatively rotatable manner (for example, by a bearing manner);

in the circumferential direction of the middle roller shaft, the first middle roller, the third middle roller, the fourth middle roller and the fifth middle roller are sleeved on the middle roller shaft in a relatively rotatable manner, and the second middle roller is sleeved on the middle roller shaft in a relatively fixed manner.

Thus, the feeding speeds of the first component yarn and the second component yarn can be respectively regulated and controlled through the rear roller shaft and the middle roller shaft.

Further, the front roller shaft is also included; in the circumferential direction of the front roller shaft, the first front roller and the second front roller are sleeved on the front roller shaft in a relatively rotatable manner, and the third front roller is sleeved on the front roller shaft in a relatively fixed manner.

Further, the first transmission gear set comprises a first driving gear, a first carrier gear and a first driven gear which are sequentially meshed for transmission; the first driving gear is fixedly connected with the first rear roller in a coaxial manner, and the first driven gear is fixedly connected with the first middle roller in a coaxial manner;

the second transmission gear set comprises a second driving gear, a second carrier gear and a second driven gear which are sequentially meshed for transmission; the second driving gear is fixedly connected with the second middle roller in a coaxial manner, and the second driven gear is fixedly connected with the second rear roller in a coaxial manner;

the third transmission gear set comprises a third driving gear, a third bridging gear and a third driven gear which are sequentially meshed for transmission; the third driving gear is fixedly connected with the third middle roller in a coaxial manner, and the third driven gear is fixedly connected with the third rear roller in a coaxial manner;

The fourth transmission gear set comprises a fourth driving gear, a fourth bridging gear and a fourth driven gear which are sequentially meshed for transmission; the fourth driving gear is fixedly connected with the fourth middle roller in a coaxial manner, and the fourth driven gear is fixedly connected with the fourth rear roller in a coaxial manner;

the fifth transmission gear set comprises a fifth driving gear, a fifth bridging gear and a fifth driven gear which are sequentially meshed for transmission; the fifth driving gear is fixedly connected with the fifth middle roller in a coaxial mode, and the fifth driven gear is fixedly connected with the fifth rear roller in a coaxial mode.

Further, a first auxiliary shaft is also included;

in the circumferential direction, the third carrier gear is sleeved on the first auxiliary shaft relatively fixedly; the first, second, fourth and fifth intermediate gears are rotatably journalled on the first auxiliary shaft.

Further, the device also comprises a second auxiliary shaft and a third auxiliary shaft which are arranged in parallel with the first auxiliary shaft, and a transmission gear which is meshed with the fourth bridge gear for transmission is fixedly sleeved on the second auxiliary shaft; and a transmission gear meshed with the fifth intermediate gear is fixedly sleeved on the third auxiliary shaft.

Thus, the feeding speeds of the first component yarn, the second component yarn, the third component yarn, the fourth component yarn and the fifth component yarn can be respectively controlled through the rear roller shaft, the middle roller shaft, the first auxiliary shaft, the second auxiliary shaft and the third auxiliary shaft.

Preferably, the rear roller, the middle roller and the front roller are nested rollers. Of course, the driving modes of the rear roller and the middle roller on different channels are not limited to the above modes, for example, a leather collar for belt transmission is arranged on the rear roller or the middle roller on each channel, and the leather collar is connected with a servo motor through a belt transmission mechanism; or the rear roller or the middle roller on each channel is respectively and independently provided with a transmission gear structure, and is connected with a servo motor through a speed reducing mechanism. For another example, the first auxiliary shaft and the second auxiliary shaft can be arranged coaxially, the third bridging gear and the fourth bridging gear are respectively and fixedly sleeved on the first auxiliary shaft and the second auxiliary shaft, and the feeding speeds of the third component yarn and the fourth component yarn can be respectively controlled through the first auxiliary shaft and the second auxiliary shaft.

Further, the device also comprises a first front shaft and a second front shaft, wherein the first front shaft is connected with the first front roller through a first gear transmission pair, the second front shaft is connected with the second front roller through a second gear transmission pair, and the rotating speeds of the first front roller and the second front roller can be respectively regulated and controlled through the first front shaft and the second front shaft.

Further, the first gear pair includes: the first main gear and the first auxiliary gear are meshed with each other for transmission, the first main gear is fixedly sleeved on the first front shaft, and the first auxiliary gear is coaxially and fixedly connected with the first front roller;

the second gear pair includes: the second main gear and the second auxiliary gear are meshed with each other for transmission, the second main gear is fixedly sleeved on the second front shaft, and the second auxiliary gear is fixedly connected with the second front roller in a coaxial mode.

Further, the device also comprises a control system and a servo driving system;

the servo driving system comprises a servo driver and a servo motor;

the control system comprises a controller (preferably a PLC programmable controller) and a rotating speed sensor;

the controller is connected with the servo motor through a servo driver in sequence;

the servo motor includes: the hollow spindle comprises a first servo motor for driving the rear roller shaft to rotate, a second servo motor for driving the middle roller shaft to rotate, a third servo motor for driving the first auxiliary shaft to rotate, a fourth servo motor for driving the second auxiliary shaft to rotate, a fifth servo motor for driving the third auxiliary shaft to rotate, a sixth servo motor for driving the first front shaft, a seventh servo motor for driving the second front shaft, an eighth servo motor for driving the front roller shaft to rotate and a spindle motor for driving the hollow spindle to rotate;

The rotational speed sensor includes: the spindle sensor is used for monitoring the rotating speeds of the rear roller shaft, the middle roller shaft, the first auxiliary shaft, the second auxiliary shaft, the third auxiliary shaft, the first front shaft, the second front shaft and the front roller shaft respectively, and is used for monitoring spindle sensors of the rotating speeds of the hollow spindle.

The controller in the invention sequentially controls the feeding speeds of the seven-component yarns through the servo driver and the servo motor, the rotating speed sensor monitors the actual feeding speeds of the seven-component yarns in real time, the monitoring value is fed back to the controller, and the controller can adjust the sizes of the seven-component yarn control signals according to the monitoring value.

Further, the twisting mechanism comprises a ring plate; the controller controls the movement of the ring plate through a servo driver and a servo motor; and a false twister motor for driving the false twister to move, and a false twister sensor for detecting the rotation speed of the false twister.

In addition, the control system includes a series of instructions and a modular program.

Further, the control system further comprises a first comparison module, the first comparison module is respectively connected with the first sensor, the second sensor, the third sensor, the fourth sensor, the fifth sensor and the controller, the first comparison module is used for monitoring the rotation speed ratio among the middle roller shaft, the rear roller shaft, the first auxiliary shaft, the second auxiliary shaft and the third auxiliary shaft, and the controller regulates and controls the rotation speed of the middle roller shaft, the rear roller shaft, the first auxiliary shaft, the second auxiliary shaft and/or the third auxiliary shaft according to the numerical value fed back by the first comparison module, so that the blending ratio among the first component yarn, the second component yarn, the third component yarn, the fourth component yarn and the fifth component yarn is regulated and controlled.

In order to accurately and rapidly realize yarn blending ratio regulation and control, the invention directly regulates and controls according to the numerical value fed back by the first comparison module, even if the rotating speeds of the middle roller shaft, the rear roller shaft or the three auxiliary shafts respectively exceed the set error range due to various error reasons, the invention can continue production without additionally regulating the actual rotating speeds of the rear roller shaft, the middle roller shaft, the first auxiliary shaft, the second auxiliary shaft and the third auxiliary shaft as long as the rotating speed ratio of the five shafts fed back by the first comparison module (namely, the feeding speed ratio of the first component yarn, the second component yarn, the third component yarn, the fourth component yarn and the fifth component yarn) is ensured to be within the set error range.

Compared with the prior art, the invention only needs to monitor one parameter compared with the prior art that a plurality of parameters such as the middle roller and the back roller in different channels are monitored simultaneously, the invention widens the regulation precision of the middle roller and the back roller, increases the redundancy of system control, highlights the importance of the rotation speed ratio of the upper roller of different channels, greatly improves the control precision of the blending ratio of yarns while greatly reducing the workload of the controller processing, and in addition, avoids the shutdown or adjustment time in the production process, and improves the production efficiency of equipment by more than 30 percent.

The comparison module may be a prior art, may be an existing comparator or integrated comparison circuit, or may be a comparison module in the form of software in the controller CUP. The sensor is also in many forms, for example, a photoelectric encoder or a hall rotation speed sensor, etc.

Further, the outer diameter sizes of the first front roller, the second front roller and the third front roller are the same.

By adopting the technical scheme, the invention has the following beneficial effects:

the invention provides a forming device for six-channel hollow spindle fancy yarn, which comprises a hollow spindle spinning system with six spinning channels and two twisting points, wherein a first twisting point respectively outputs five untwisted yarns and one staple yarn (or filament) at three front rollers which are coaxial and have different rotating speeds, and the yarns are alternately twisted in a twisting triangular area to form a fancy yarn main body, and the staple yarn (or filament) output by a hollow spindle at a second twisting point is subjected to cladding twisting with the formed fancy yarn main body to form fancy yarn comprising decorative yarn, core yarn and fixed yarn, so that the spinning of the hollow spindle fancy yarn by a one-step method of decorative yarn, core yarn and fixed yarn is realized;

in addition, through regulating and controlling the cooperative change of the speeds of the rear roller, the middle roller, the three auxiliary shafts and the three front rollers, the fancy yarn with multiple structures such as single-twist coating, cross-twist coating, twist coating and the like is spun; the yarn is spun into a combined fancy yarn with changeable appearance and shape by regulating and controlling the speeds of the rear roller, the middle roller, the auxiliary shaft and the three front rollers to cooperatively change, on-line changing the combination of the decorative yarn and the core yarn, on-line changing the combination of the patterns such as knots, braids, loops and the like, on-line changing the sizes of the patterns such as knots, braids, loops and the like, on-line changing the colors of the patterns such as knots, braids, loops and the like; finally, the coating ratio of the core wire, the decorative wire and the solid wire is regulated and controlled by regulating and controlling the speeds of the rear roller, the middle roller, the auxiliary shaft and the three front rollers in a cooperative mode, the color fancy yarn with online color change is spun, and the production efficiency is greatly improved.

In addition, the invention also discloses a fancy yarn forming method adopting the six-channel hollow spindle fancy yarn forming device.

Further, the second component yarn and the fifth component yarn (roving Y ₂ Roving Y ₅ ) The alternating drafting is carried out through a second channel and a fifth channel, and then the alternating drafting is output through a first front roller; third component yarn and fourth component yarn (roving Y ₃ Roving Y ₄ ) The alternating drafting is carried out through a third channel and a fourth channel, and then the alternating drafting is output through a second front roller; first component yarn (roving Y) ₁ ) Outputting by a third front roller after alternating drafting through the first channel; sixth component yarn (yarn X ₁ ) Outputting by a third front roller through a sixth channel;

in a twisting triangular area of the first twisting point, the first component yarn, the second component yarn, the third component yarn, the fourth component yarn, the fifth component yarn and/or the sixth component yarn are alternately twisted under the twisting force of the hollow spindle to form a fancy yarn main body; the seventh component yarn (yarn fixing G) output from the hollow spindle at the second twisting point ₁ ) And the yarn is wrapped and twisted with the formed fancy yarn main body to form fancy yarn, so that the hollow spindle fancy yarn is spun by the trim, core yarn and solid yarn one-step method.

Further, through regulating and controlling the speeds of the rear roller, the middle roller and the three front rollers on the first channel, the second channel, the third channel, the fourth channel and/or the fifth channel, the single-twist cladding structure fancy yarn, the cross-twist cladding structure fancy yarn and the winding cladding structure fancy yarn can be spun respectively by the cooperative input of the decorative yarn and the core yarn;

One untwisted strand or yarn is twisted at the first twisting point through the first channel, the second channel, the third channel, the fourth channel, the fifth channel or the sixth channel, and is covered by a seventh component yarn at the second twisting point to form a single-twist cladding structure fancy yarn;

two untwisted strands or yarns are respectively led into the alternating twisting triangular area through two channels of the first channel, the second channel, the third channel, the fourth channel, the fifth channel or the sixth channel, and are covered by a seventh component yarn at a second twisting point after being twisted at the same speed at the first twisting point to form the fancy yarn with the alternating twisting cladding structure;

at least three yarns of the first component yarn, the second component yarn, the third component yarn, the fourth component yarn, the fifth component yarn and the sixth component yarn are led into the alternating twisting triangular area, and are covered by the sixth component yarn at the second twisting point after non-constant-speed twisting is carried out at the first twisting point to form the twisting cladding structure fancy yarn.

Further, a twisting phenomenon is generated at a first twisting point by a plurality of groups of yarns or strands which are output by the front roller at different speeds, and the groups of yarns or strands which are twisted with each other are obviously separated into a decorative yarn and a core yarn along with the increase of the speed difference, and the decorative yarn is twisted on the core yarn to form a fancy yarn shape; the on-line change of the combination mode of the decorative yarn and the core yarn, the on-line change of the pattern combination mode, the on-line change of the pattern size, the on-line change of the pattern color and the spinning of the combined fancy yarn with changeable appearance form can be realized by on-line regulating and controlling the speeds of the rear roller, the middle roller and the three front rollers.

Wherein the flower shape comprises knots, braids, circles and the like.

Further, the first component yarn is introduced into an alternate twisting triangle zone by a third front roller after being drawn alternately through a first channel; the third component yarn and the fourth component yarn are led into an alternate twisting triangle area by a second front roller after being alternately drafted by a third channel and a fourth channel; the second component yarn and the fifth component yarn are introduced into an alternating twisting triangle zone by a first front roller after being alternately drafted by a second channel and a fifth channel; the sixth component yarn is led into the alternating twisting triangle area through a sixth channel by a third front roller; the component yarn with the lowest front roller speed is core yarn of fancy yarn, the component yarn with higher front roller speed is decorative yarn of fancy yarn, and the on-line change of the combination mode of the decorative yarn and the core yarn in the fancy yarn is realized by on-line adjusting the feeding speeds of the three front rollers.

Further, the speeds of the first front roller, the second front roller and the third front roller are respectively V _q1 、V _q2 And V _q3 Through on-line regulation and control of V _q1 、V _q2 And/or V _q3 Under the condition that the rotation speed of the rear roller and the rotation speed of the middle roller on the first channel, the second channel, the third channel, the fourth channel and the fifth channel are kept unequal and are not zero, the V is regulated and controlled by a controller _q1 (t):V _q2 (t):V _q3 The ratio of (t) can realize the online change of various pattern combinations on the fancy yarn;

(1) when V is _q1 (t):V _q2 (t):V _q3 (t) = (1.15-1.3): (1.15-1.3) in 1, the second component yarn, the fifth component yarn, the third component yarn and the fourth component yarn are alternately twisted and kinked to form knots on the first component yarn and the sixth component yarn;

(2) when V is _q1 (t):V _q2 (t):V _q3 (t) = (1.3-4): (1.3-4) in 1, the second component yarn, the fifth component yarn, the third component yarn and the fourth component yarn are alternately twisted and kinked to form loops on the first component yarn and the sixth component yarn;

(3) when V is _q1 (t):V _q2 (t):V _q3 (t) =1:1, (1.15-1.3) the first component yarn and the sixth component yarn are alternately twisted and kinked to form knots on the second component yarn, the fifth component yarn, the third component yarn and the fourth component yarn;

(4) when V is _q1 (t):V _q2 (t):V _q3 When (t) =1:1, (1.3-4), the first component yarn and the sixth component yarn are alternately twisted and kinked to form a braid or loop on the second component yarn, the fifth component yarn, the third component yarn and the fourth component yarn.

Further, the middle roller speed V in the first channel, the second channel, the third channel, the fourth channel and/or the fifth channel is regulated and controlled on line _z (t) and velocity V of the rear roller _h (t) further changing the linear density of the first component yarn, the second component yarn, the third component yarn, the fourth component yarn and/or the fifth component yarn and/or by regulating the speed V of the third front roller on line _q3 (t) thereby enabling an on-line variation of the size of the pattern on the fancy yarn.

Further, the on-line variation of the pattern size on the fancy yarn specifically includes:

(1) on-line regulation and control of fancy yarn knot size

When V is _q1 (t):V _q2 (t):V _q3 (t) = (1.15-1.3): (1.15-1.3) in 1, the second, fifth, third and fourth component yarns are decorative yarns (decorative yarns [ (Y) ₂ +Y ₅ )+(Y ₃ +Y ₄ )]) The first component yarn and the sixth component yarn are core yarns (core yarn Y ₁ +X ₁ ) The decorative yarn is alternately twisted and kinked on the core yarn to form knots;

the yarn density of the yarn at this time is:

by regulating the speed of the middle roller and the speed of the rear roller in the second channel, the third channel, the fourth channel and/or the fifth channel on line (particularly regulating the speeds V of the middle roller shaft, the first auxiliary shaft, the second auxiliary shaft and the third auxiliary shaft by PLC) _z (t)、V _f1 (t)、V _f2 (t)、V _f3 (t)) can regulate the change of the density of the decorative yarn, and the density of the decorative yarn is increased when the feeding speed of the middle roller and the rear roller is increased; when the feeding speed of the middle roller and the rear roller is reduced, the linear density of the decorative yarn is reduced;

(2) on-line regulation and control of fancy yarn loop size

When V is _q1 (t):V _q2 (t):V _q3 When the yarn is 1, the second component yarn, the fifth component yarn, the third component yarn and the fourth component yarn are decorative yarns, the first component yarn and the sixth component yarn are core yarns, and the decorative yarns are alternately twisted and kinked on the core yarns to form a loop;

The yarn density of the looped yarn was:

the change of the density of the decorative yarns can be regulated and controlled by regulating the speed of the middle roller and the speed of the rear roller in the second channel, the third channel, the fourth channel and/or the fifth channel on line, and the density of the decorative yarns is increased when the feeding speed of the middle roller and the rear roller is increased; when the feeding speed of the middle roller and the rear roller is reduced, the linear density of the decorative yarn is reduced;

meanwhile, the overfeeding quantity of the decorative yarn relative to the core yarn speed is regulated and controlled, namely the speed V of the first front roller is regulated and controlled _q1 (t) and second front roller speed V _q2 (t) relative to the third front roller velocity V _q3 The overfeeding amount of (t) is large, and the overfeeding is small, so that the size of the formed fancy yarn loop is regulated and controlled on line;

(3) on-line regulation and control of fancy yarn braid length

When V is _q1 (t):V _q2 (t):V _q3 When (t) =1:1, (1.3-4), the second component yarn, the fifth component yarn, the third component yarn and the fourth component yarn are core yarns, the first component yarn and the sixth component yarn are decorative yarns, the decorative yarns are alternately twined and twisted on the core yarns to form a loop, and when the decorative yarns are strong twisting yarns, the loop formed under the self twisting stress of the decorative yarns is immediately twisted into a braid;

yarn speed V is regulated and controlled by PLC _q3 (t) an ultra-small amount of relative core yarn speed, wherein the strand is long when the overfeeding amount is large, and the strand is short when the overfeeding amount is small, so that the length of the formed fancy yarn strand is regulated and controlled to change on line.

Further, the component yarns forming the decorative yarn are colored yarns, the change of the blending ratio of the decorative yarn can be regulated and controlled by regulating and controlling the speeds of the middle roller shaft and the rear roller of the drafting zone, and when the decorative yarn forms a pattern, the online change of the spinning pattern color is realized by regulating and controlling the change of the blending ratio of the decorative yarn.

Further, the wrapping structure and the wrapping ratio of each component of the fancy yarn can be regulated and controlled by regulating and controlling the speeds of the back roller, the middle roller and the three front rollers on the first channel, the second channel, the third channel, the fourth channel and/or the fifth channel, so that the online color change of the fancy yarn can be regulated and controlled online.

The following explains the structural parameters of the forming fancy yarn of the alternating draft twisting coating hollow spindle spinning system.

The linear density, the core yarn density and the solid yarn density of the five rovings serving as the decoration yarns are respectively ρ ₁ 、ρ ₂ 、ρ ₃ 、ρ ₄ 、ρ ₅ 、ρ _x 、ρ _g After alternating drafting, alternating twisting and yarn fixing coating, the linear density of the fancy yarn is ρ _hy The speeds of the three front rollers, the rear rollers, the middle rollers and the three auxiliary shafts in the spinning process and the core wire feeding speed (the drawing roller speed) are respectively V _q1 (t)、V _q2 (t)、V _q3 (t)、V _h (t)、V _z (t)、V _f1 (t)、V _f2 (t)、V _f3 (t)、V _R1 (t), c=1.25 is the speed ratio of the rear roller in each channel. Alternating drafting, alternating twisting and fixing of warp-decorated yarn core yarn After the yarn is coated, the structural parameters of the formed fancy yarn are as follows:

1. yarn density and blending ratio of decorative yarn

2. Linear density of core yarn:

3. linear density of the solid yarn:

ρ _g (t)＝ρ _g (8)

4. yarn density and coating ratio of fancy yarn

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings which are required in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are some embodiments of the invention and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a hollow spindle fancy yarn forming apparatus provided in embodiment 1;

FIG. 2 is a schematic view of first to sixth channels of the yarn forming device in example 1;

FIG. 3 is a transmission structure diagram of the hollow spindle fancy yarn forming device provided in embodiment 1;

FIG. 4 is a transmission structure diagram between the first auxiliary shaft and the second and third auxiliary shafts in embodiment 1;

FIG. 5 is a schematic circuit diagram of a hollow yarn fancy yarn forming apparatus in example 1 of the present invention;

fig. 6 is a circuit diagram showing a comparison module in the apparatus for forming a fancy yarn with hollow spindle in example 3 of the present invention.

Reference numerals:

Y ₁ -a first component yarn; y is Y ₂ -a second component yarn; y is Y ₃ -a third component yarn; y is Y ₄ -a fourth component yarn; y is Y ₅ -a fifth component yarn; x is X ₁ -a sixth component yarn; g ₁ -a seventh component yarn; r is R ₁ -a take-out roller; r is R ₂ -a hollow spindle; d (D) ₁ -a first twisting point; d (D) ₂ -a second twisting point; 41-a first rear roller; 42-a second rear roller; 43-a third rear roller; 44-a fourth rear roller; 45-a fifth back roller; 51-a first idler gear; 52-a second intermediate gear; 53-a third intermediate gear; 54-fourth intermediate gear; 55-a fifth intermediate gear; 61-a first middle roller; 62-a second middle roller; 63-a third middle roller; 64-a fourth middle roller; 65-a fifth middle roller; 71-a first front roller; 72-a second front roller; 73-a third front roller; 4-a rear roller shaft; 5-a first auxiliary shaft; 9-a second auxiliary shaft; 10-a third auxiliary shaft; 6-middle roller shaft; 7-a front roller shaft; 8-a first front axle; 11-a second front axle; 411-first drive gear; 421-a second passive gear; 431-third driven gear; 441-fourth driven gears; 451-fifth driven gears; 611-a first driven gear; 621-a second drive gear; 631-a third drive gear; 641-fourth drive gear; 651-fifth drive gear; 81-a first main gear; 711-first pinion; 112-a second main gear; 721-a second pinion; p (P) ₄ -a rear upper leather roller; p (P) ₆ -a mid-epithelial roller; p (P) ₇ -a front epithelial roller; q (Q) ₁ -an upper apron; q (Q) ₂ -a lower apron.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1

As shown in FIGS. 1-4, the six-channel hollow spindle fancy yarn forming device provided in this embodiment comprises a first component yarn Y ₁ First passage A therethrough ₁ B ₁ C ₃ D ₁ D ₂ E. For the second component yarn Y ₂ A second passage A therethrough ₂ B ₂ C ₁ D ₁ D ₂ E. For the third component yarn Y ₃ A third passage A therethrough ₃ B ₃ C ₂ D ₁ D ₂ E. For the fourth component yarn Y ₄ Fourth passage A therethrough ₄ B ₄ C ₂ D ₁ D ₂ E. For the fifth component yarn Y ₅ Fourth passage A therethrough ₅ B ₅ C ₁ D ₁ D ₂ E. For the sixth component yarn X ₁ A sixth passage R therethrough ₁ C ₃ D ₁ D ₂ E。

The first channel is provided with a first back roller 41, a first middle roller 61, a third front roller 73 and a first twisting point D in sequence ₁ And a second twisting point D ₂ The method comprises the steps of carrying out a first treatment on the surface of the The second channel is provided with a second back roller 42, a second middle roller 62, a first front roller 71 and a first twisting point D in sequence ₁ And a second twisting point D ₂ The method comprises the steps of carrying out a first treatment on the surface of the The third channel is provided with a third back roller 43, a third middle roller 63, a second front roller 72 and a first twisting point D in sequence ₁ And a second twisting point D ₂ The method comprises the steps of carrying out a first treatment on the surface of the The fourth channel is provided with a fourth back roller 44, a fourth middle roller 64, a second front roller 72 and a first twisting point D in sequence ₁ And a second twisting point D ₂ The method comprises the steps of carrying out a first treatment on the surface of the The fifth channel is provided with a fifth back roller 45, a fifth middle roller 65, a first front roller 71 and a first twisting point D in sequence ₁ And a second twisting point D ₂ The method comprises the steps of carrying out a first treatment on the surface of the The sixth channel is provided with a third front roller 73 and a first twisting point D in sequence ₁ And a second twisting point D ₂ 。

The region between the rear roller, the middle roller and the front roller on the channel is a drafting zone, a first front roller 71, a second front roller 72, a third front roller 73 and a first twisting point D ₁ Forming an inter-twist triangle C ₁ C ₂ C ₃ D ₁ The first front roller 71, the second front roller 72 and the third front roller 73 respectively and independently move to respectively introduce corresponding component yarns into the alternating twisting triangular area; one or a plurality of yarns of the first component yarn, the second component yarn, the third component yarn, the fourth component yarn, the fifth component yarn and/or the sixth component yarn pass through the first twisting point D ₁ Forming the fancy yarn body after the alternate twisting. Second twisting point D ₂ A hollow spindle R is arranged at the position ₂ The fancy yarn body passes through the hollow spindle R ₂ Hollow spindle R ₂ Quick rotation hollow spindle R ₂ The seventh component yarn G ₁ Intersecting with the fancy yarn main body and coating the fancy yarn main body.

The embodiment also comprises a filament bobbin (not shown) and a false twister (not shown), wherein the filament bobbin is sleeved on the hollow spindle and synchronously rotates with the hollow spindle, and the seventh component yarn G ₁ Wound on a filament bobbin. The false twister is used for twisting the fancy yarn main body.

Wherein the first back roller 41 and the first middle roller 61 are connected through a first transmission gear set, and the first transmission gear set is used for keeping the traction ratio (linear velocity ratio) between the first middle roller 61 and the first back roller 41 constant and not more than 1.4; the second back roller 42 and the second middle roller 62 are connected through a second transmission gear set, and the second transmission gear set is used for keeping the traction ratio (linear velocity ratio) between the second middle roller 62 and the second back roller 42 constant and not more than 1.4; the third rear roller 43 and the third middle roller 63 are connected through a third transmission gear set, and the third transmission gear set is used for keeping the traction ratio (linear velocity ratio) between the third middle roller 63 and the third rear roller 43 constant and not more than 1.4; the fourth rear roller 44 and the fourth middle roller 64 are connected by a fourth transmission gear set, and the fourth transmission gear set is used for keeping the traction ratio (linear velocity ratio) between the fourth middle roller 64 and the fourth rear roller 44 constant and not more than 1.4; the fifth back roller 45 and the fifth middle roller 65 are connected by a fifth transmission gear set for keeping the traction ratio (linear velocity ratio) between the fifth middle roller 65 and the fifth back roller 45 constant and not more than 1.4.

In the first to five channels, a primary drafting unit is formed between a middle roller and a rear roller, and a secondary drafting unit is formed by a front roller and the middle roller; the speed ratio of the middle roller and the rear roller of the same channel is constant and less than 1.4, and the speed ratio is synchronously changed relative to the front roller in the channel, and the speed ratio of the middle roller and the rear roller of different channels is alternately changed relative to the front roller, so that the alternating drafting of five groups of roves is realized. Of particular importance, the first draft is pre-draft, the first draft ratio e _h The constant C is the constant draft, the draft ratio e of the first-order draft _h The number of times C is less than or equal to 1.4, the continuity of the roving can be ensured, and the drafting singular point can not be generated in the first drafting zone. Meanwhile, the fiber in the roving can be straightened, tensioned and oriented in the pre-drafting process, so that the preparation of sliding in the main drafting process is finished, the breakage rate or the singular point rate in the main drafting process is reduced, the drafting and twisting process is more stable, and the labor intensity of workers is greatly reduced.

Wherein, a rear upper leather roller P is correspondingly arranged above each rear roller, middle roller and front roller ₄ Middle epithelial roller P ₆ And front epithelial roller P ₇ The upper roller is matched with the lower roller for clamping the yarn.

Preferably, an upper epithelial roller is correspondingly arranged above the middle roller on the same channel in the first channel, the second channel and the third channel, and the yarn is formed The device also comprises an upper leather collar Q sleeved on the middle upper leather roller and the upper pin and keeping synchronous motion with the middle roller ₁ Lower apron Q sleeved on middle roller and lower pin and keeping synchronous motion with middle roller ₂ The method comprises the steps of carrying out a first treatment on the surface of the The distance between the holding jaws of the upper leather collar and the lower leather collar and the jaw line of the front roller is less than 3mm.

Two-stage drafting e _q For dynamic main drafting, the speed of the middle roller is changed relative to the front roller, when the blending ratio K=0% of one component yarn in the first channel, the second channel or the third channel, the secondary drafting ratio e of the channel yarn _q When in = ≡, the channel yarn forms a drafting singular point in the second drafting zone, and the distance delta between the drafting singular point and the front roller jaw is less than or equal to 3mm. When K is increased gradually, along with synchronous starting of the rear roller and the middle roller, the whisker held by the upper leather collar and the lower leather collar is instantaneously fed into a jaw of the front roller to carry out secondary drafting, so that the drafting singular point in the secondary drafting zone does not influence the stability of spinning.

The sixth channel also comprises a drawing roller R ₁ Drawing roller R ₁ Third front roller 73, first twisting point D ₁ And a second twisting point D ₂ Is sequentially arranged.

The embodiment also comprises a rear roller shaft 4, a middle roller shaft 6 and a front roller shaft 7; the first back roller 41 is sleeved on the back roller shaft 4 relatively fixedly in the circumferential direction of the back roller shaft 4 in a key manner, and the second back roller 42, the third back roller 43, the fourth back roller 44 and the fifth back roller 45 are sleeved on the back roller shaft 4 in a bearing manner at intervals or directly in a relatively rotatable manner; in the circumferential direction of the middle roller shaft 6, the first middle roller 61, the third middle roller 63, the fourth middle roller 64 and the fifth middle roller 65 are sleeved on the middle roller shaft 6 in a relatively rotatable manner, and the second middle roller 62 is sleeved on the middle roller shaft 6 in a relatively fixed manner. Thus, the feeding speeds of the first component yarn and the second component yarn can be respectively regulated and controlled through the rear roller shaft 4 and the middle roller shaft 6.

The first front roller 71 and the second front roller 72 are rotatably fitted around the front roller shaft 7 in the circumferential direction of the front roller shaft 7, and the third front roller 73 is fixedly fitted around the front roller shaft 7.

Wherein the rear roller, the middle roller and the front roller are preferably nested rollers.

The first transmission gear set comprises a first driving gear 411, a first carrier gear 51 and a first driven gear 611 which are sequentially meshed for transmission; the first driving gear is fixedly connected with the first rear roller 41 coaxially and the first driven gear is fixedly connected with the first middle roller 61 coaxially;

the second transmission gear set comprises a second driving gear 621, a second carrier gear 52 and a second driven gear 421 which are sequentially meshed for transmission; the second driving gear is fixedly connected with the second middle roller 62 in a coaxial manner, and the second driven gear is fixedly connected with the second rear roller 42 in a coaxial manner;

the third transmission gear set comprises a third driving gear 631, a third carrier gear 53 and a third driven gear 431 which are sequentially meshed for transmission; the third driving gear is fixedly connected with the third middle roller 63 in a coaxial manner, and the third driven gear is fixedly connected with the third rear roller 43 in a coaxial manner;

the fourth transmission gear set comprises a fourth driving gear 641, a fourth carrier gear 54 and a fourth driven gear 441 which are sequentially meshed for transmission; the fourth driving gear is fixedly connected with the center of the fourth middle roller 64, and the fourth driven gear is fixedly connected with the center of the fourth rear roller 44.

The fifth transmission gear set comprises a fifth driving gear 651, a fifth bridge gear 55 and a fifth driven gear 451 which are sequentially meshed for transmission; the fifth driving gear is fixedly connected with the center of the fifth middle roller 65, and the fifth driven gear is fixedly connected with the center of the fifth rear roller 45.

The present embodiment further includes a first auxiliary shaft 5, a second auxiliary shaft 9 and a third auxiliary shaft 10 disposed in parallel with the first auxiliary shaft 5; the third carrier gear 53 is fixedly mounted on the first auxiliary shaft 5 in a circumferential direction; the first, second, fourth and fifth intermediate gears 51, 52, 54 and 55 are rotatably journaled on the first auxiliary shaft 5. A transmission gear 94 which is meshed with the fourth carrier gear 54 for transmission is fixedly sleeved on the second auxiliary shaft 9; the third auxiliary shaft 10 is fixedly sleeved with a transmission gear 105 which is meshed with the fifth intermediate gear 55 for transmission. Thereby, the feeding speeds of the first component yarn, the second component yarn, the third component yarn, the fourth component yarn and the fifth component yarn can be controlled by the rear roller shaft 4, the middle roller shaft 6, the first auxiliary shaft 5, the second auxiliary shaft 9 and the third auxiliary shaft 10, respectively.

The embodiment further comprises a first front shaft 8 and a second front shaft 11, wherein the first front shaft 8 is connected with the first front roller 71 through a first gear transmission pair, the second front shaft 11 is connected with the second front roller 72 through a second gear transmission pair, and the rotation speeds of the first front roller 71 and the second front roller 72 can be respectively regulated and controlled through the first front shaft 8 and the second front shaft 11.

The first gear transmission pair includes: the first main gear 81 and the first auxiliary gear 711 which are mutually meshed and driven, the first main gear 81 is fixedly sleeved on the first front shaft 8, and the first auxiliary gear 711 is fixedly connected with the first front roller 71 in a coaxial way; the second gear transmission pair includes: the second main gear 112 and the second auxiliary gear 721 are meshed with each other, the second main gear 112 is fixedly sleeved on the second front shaft 11, and the second auxiliary gear 721 is fixedly connected with the second front roller 72 in a coaxial manner.

As shown in fig. 5, the present embodiment further includes a control system and a servo drive system; the servo driving system comprises a servo driver and a servo motor; the control system comprises a controller (preferably a PLC programmable controller) and a rotating speed sensor; the controller is connected with the servo motor through the servo driver in turn.

The servo motor includes: a first servo motor for driving the rear roller shaft 4 to rotate, a second servo motor for driving the middle roller shaft 6 to rotate, a third servo motor for driving the first auxiliary shaft 5 to rotate, a fourth servo motor for driving the second auxiliary shaft 9 to rotate, a fifth servo motor for driving the third auxiliary shaft 10 to rotate, a sixth servo motor for driving the first front shaft 8, a seventh servo motor for driving the second front shaft 11, an eighth servo motor for driving the front roller shaft 7, and a spindle motor for driving the hollow spindle to rotate.

The rotation speed sensor includes: a first sensor, a second sensor, a third sensor, a fourth sensor, a fifth sensor, a sixth sensor, a seventh sensor and an eighth sensor for monitoring the rotational speeds of the rear roller shaft 4, the middle roller shaft 6, the first auxiliary shaft 5, the second auxiliary shaft 9, the third auxiliary shaft 10, the first front shaft 8, the second front shaft 11 and the front roller shaft 7, respectively, and a spindle sensor for monitoring the rotational speed of the hollow spindle.

The twisting mechanism comprises a ring plate; the controller controls the movement of the ring plate through a servo driver and a servo motor, and further comprises a false twister motor for driving the false twister to move, and a false twister sensor for detecting the rotation speed of the false twister. In addition, the control system includes a series of instructions and a modular program.

The invention provides a six-channel hollow spindle fancy yarn forming device, which is characterized in that a hollow spindle spinning system with six spinning channels and two twisting points is constructed, five non-twisted yarns and one spun yarn (or filament) are respectively output from three front rollers which are coaxial and have different rotating speeds at a first twisting point D1, the five non-twisted yarns and the one spun yarn (or filament) are alternately twisted in a twisting triangular region to form a fancy yarn main body, and the spun yarn (or filament) output from a hollow spindle at a second twisting point D2 is subjected to cladding twisting with the formed fancy yarn main body to form fancy yarns comprising decorative yarns, core yarns and fixed yarns, so that the spinning of the hollow spindle fancy yarns by a decorative yarn, core yarns and fixed yarns in one step is realized.

Example 2

In addition, the embodiment also discloses a fancy yarn forming method adopting the six-channel hollow spindle fancy yarn forming device.

1. Spinning of hollow spindle fancy yarn formed by twisting decorative thread, core thread and fixed thread in one step

The hollow spindle spinning device in this embodiment has seven spinning channels and two twisting points. Wherein the second component yarn and the fifth component yarn (roving Y ₂ Roving Y ₅ ) The alternating drafting is carried out through a second channel and a fifth channel, and then the alternating drafting is output through a first front roller; third component yarn and fourth component yarn (roving Y ₃ Roving Y ₄ ) The alternating drafting is carried out through a third channel and a fourth channel, and then the alternating drafting is output through a second front roller; first component yarn (roving Y) ₁ ) Outputting by a third front roller after alternating drafting through the first channel; sixth component yarn (or filament) X ₁ ) Outputting by a third front roller through a sixth channel;

in a twisting triangle area of the first twisting point, the first component yarn, the second component yarn, the third component yarn, the fourth component yarn, the fifth component yarn and the sixth component yarn (namely, three front rollers which are coaxial and have different outer diameters and different rotating speeds respectively output five untwisted yarns and one staple yarn (or filament)) are alternately twisted under the twisting force of a hollow spindle to form a fancy yarn main body; the seventh component yarn (spun yarn (or filament) fed from the hollow spindle at the second twisting point is taken up as yarn G ₁ ) And the yarn is wrapped and twisted with the formed fancy yarn main body to form fancy yarn, so that the hollow spindle fancy yarn is spun by the trim, core yarn and solid yarn one-step method.

2. Spinning of fancy yarn with online changing wrapping structure

The speed of the rear roller, the middle roller and the speed of the three front rollers on the first channel, the second channel, the third channel, the fourth channel and/or the fifth channel are regulated and controlled, so that single-twist cladding structure fancy yarns, cross-twist cladding structure fancy yarns and winding cladding structure fancy yarns can be spun respectively by synergically inputting decorative yarns and core yarns;

One untwisted strand or yarn is twisted at the first twisting point through the first channel, the second channel, the third channel, the fourth channel, the fifth channel or the sixth channel, and is covered by a seventh component yarn (solid yarn) at the second twisting point to form a single-twist covered structure fancy yarn;

two untwisted strands or yarns are respectively led into the alternating twisting triangular area through two channels of the first channel, the second channel, the third channel, the fourth channel, the fifth channel or the sixth channel, and are coated by a seventh component yarn (solid yarn) at a second twisting point after the first twisting point is twisted at a constant speed to form the fancy yarn with the alternating twisting coating structure;

at least three yarns of the first component yarn, the second component yarn, the third component yarn, the fourth component yarn, the fifth component yarn and the sixth component yarn are introduced into the alternating twisting triangle zone, and after non-constant speed twisting is performed at the first twisting point, are twisted at the second twisting point by the sixth component yarn (solid yarn G ₁ ) Wrapping to form the twisting wrapping structure fancy yarn.

Spinning fancy yarn with single-twist cladding structure:

the single twist cladding structure of fancy yarn refers to a fancy yarn structure formed by twisting an untwisted yarn strand (or yarn) at a first twisting point and cladding a yarn at a second twisting point by a yarn fixing device.

In the device of the invention, the output strand is single-twisted at a first twisting point and is fed by a solid thread G from a hollow spindle at a second twisting point ₁ Cladding forms a single twist clad fancy yarn structure. Can be formed in this way (Y ₁ +G ₁ )、(Y ₂ +G ₁ )、(Y ₃ +G ₁ )、(Y ₄ +G ₁ )、(Y ₅ +G ₁ )、(X ₁ +G ₁ )、[(Y ₅ +Y ₂ )+G ₁ ]、[(Y ₃ +Y ₄ )+G ₁ ]Eight kinds of fancy yarn with single-twist cladding structure.

Spinning of fancy yarn of the cross-twisting cladding structure:

the twisting cladding structure of the fancy yarn means that two non-twisted strands (or yarns) are twisted at the same speed at a first twisting point and are covered with a solid yarn at a second twisting point to form the fancy yarn structure.

In the device of the invention, two strands are output from two front rollers and are twisted at a constant speed at a first twisting point, and a fixed thread G output from a hollow spindle is output at a second twisting point ₁ Cladding to form a fancy yarn structure with the cross-twisted cladding. In this way [ Y ] can be formed ₁ +Y ₂ +G ₁ ]、[Y ₁ +Y ₃ +G ₁ ]、[Y ₁ +Y ₄ +G ₁ ]、[Y ₁ +Y ₅ +G ₁ ]、[Y ₂ +Y ₃ +G ₁ ]、[Y ₂ +Y ₄ +G ₁ ]、[Y ₂ +X ₁ +G ₁ ]、[Y ₅ +Y ₃ +G ₁ ]、[Y ₅ +Y ₃ +G ₁ ]、[Y ₅ +X ₁ +G ₁ ]、[(Y ₅ +Y ₂ )+X ₁ +G ₁ ]、[(Y ₅ +Y ₂ )+Y ₃ +G ₁ ]、[(Y ₅ +Y ₂ )+Y ₁ +G ₁ ]、[(Y ₅ +Y ₂ )+Y ₄ +G ₁ ]、[(Y ₄ +Y ₃ )+X ₁ +G ₁ ]、[(Y ₄ +Y ₃ )+Y ₁ +G ₁ ]、[(Y ₄ +Y ₃ )+Y ₂ +G ₁ ]、[(Y ₄ +Y ₃ )+Y ₅ +G ₁ ]、[(Y ₅ +Y ₂ )+(Y ₃ +Y ₄ )+G ₁ ]And 19 types of fancy yarns with cross-twisting cladding structures.

Third step, spinning fancy yarns with twisting cladding structures:

the twist wrapping structure of the fancy yarn means a fancy yarn structure in which three or more non-twisted strands (or yarns) are non-uniformly twisted at a first twisting point and covered with a solid yarn at a second twisting point. In the device of the invention, three or more non-twisted strands (or yarns) are non-uniformly output from three front rollers, non-uniformly twisted at a first twisting point, and a solid thread G output from a hollow spindle at a second twisting point ₁ CoatingForming a twisting coated fancy yarn structure. In this way [ (Y) can be formed ₂ +Y ₅ )+(Y ₁ +X ₁ )+(Y ₄ +Y ₃ )+G ₁ ]、[Y ₅ +(Y ₁ +X ₁ )+(Y ₄ +Y ₃ )+G ₁ ]、[Y ₂ +(Y ₁ +X ₁ )+(Y ₄ +Y ₃ )+G ₁ ]、[(Y ₅ +Y ₂ )+Y ₁ +(Y ₄ +Y ₃ )+G ₁ ]、[(Y ₅ +Y ₂ )+X ₁ +(Y ₄ +Y ₃ )+G ₁ ]、[(Y ₅ +Y ₂ )+(Y ₁ +X ₁ )+Y ₄ +G ₁ ]、[(Y ₅ +Y ₂ )+(Y ₁ +X ₁ )+Y ₃ +G ₁ ]Seven kinds of twisting coating structure fancy yarn.

3. Spinning of fancy yarn with on-line changing morphology

The yarn or the whisker strips which are mutually twisted are obviously separated into decorative yarn and core yarn along with the increase of the speed difference, and the decorative yarn is twisted on the core yarn to form various fancy yarn forms such as knots, braids, loops and the like; the on-line change of the combination mode of the decorative yarn and the core yarn, the on-line change of the pattern combination mode, the on-line change of the pattern size, the on-line change of the pattern color and the spinning of the combined fancy yarn with changeable appearance form can be realized by on-line regulating and controlling the speeds of the rear roller, the middle roller and the three front rollers. Wherein the flower shape comprises knots, braids, circles and the like.

Spinning of fancy yarn with online change of combination mode of decorative yarn and core yarn

The first component yarn (roving Y ₁ Introducing an alternating twisting triangle area by a third front roller after the alternating drafting of the first channel; the third component yarn and the fourth component yarn (roving Y ₃ Roving Y ₄ ) Introducing an alternating twisting triangle zone by a second front roller after alternating drafting through a third channel and a fourth channel; second component yarn and fifth component yarn (roving Y) ₂ Roving Y ₅ ) Alternating drafting through the second channel and the fifth channelThe first front roller introduces an interactive twisting triangle; sixth component yarn (or filament) X ₁ ) Introducing an interactive twisting triangle area through a sixth channel by a third front roller; the component yarn (strand) with the lowest front roller speed is core yarn of fancy yarn, the component yarn with higher front roller speed is decorative yarn of fancy yarn, and the on-line change of the combination mode of decorative yarn and core yarn in the fancy yarn is realized by on-line adjusting the feeding speeds of the three front rollers.

For example, roving Y ₃ 、Y ₄ After alternating drafting through the third channel and the fourth channel, the second front roller is driven at a speed V _q2 (t) output, roving Y ₁ Yarn X ₁ Through the first channel and the sixth channel, the third front roller is driven at the speed V _q3 (t) output, roving Y ₂ 、Y ₅ After alternating drafting through the second channel and the fifth channel, the first front roller is driven at a speed V _q1 (t) output; the yarn with the lowest front roller speed will generally become the core yarn of the fancy yarn, and the yarn with relatively higher speed will become the core yarn of the fancy yarn.

When V is _q2 At minimum (t), roving (Y) ₃ +Y ₄ ) Is a core yarn, yarn (Y ₁ +X ₁ ) And roving (Y) ₂ +Y ₅ ) Is a decorative yarn; when V is _q1 At minimum (t), roving (Y) ₂ +Y ₅ ) Is a core yarn, yarn (Y ₁ +X ₁ ) And roving (Y) ₃ +Y ₄ ) Is a decorative yarn; when V is _q3 At minimum (t), yarn (Y) ₁ +X ₁ ) Is a core yarn, roving (Y ₂ +Y ₅ ) And roving (Y) ₃ +Y ₄ ) Is a decorative yarn; thus, V is regulated by PLC _q1 (t)、V _q2 (t)、V _q3 (t) on-line variation of the combination pattern of the decorative yarn and the core yarn can be realized.

Fancy yarn spinning with combination of patterns, such as knots, braids, loops and the like, changing on line

The speeds of the first front roller, the second front roller and the third front roller are respectively V _q1 、V _q2 And V _q3 Through on-line regulation and control of V _q1 、V _q2 And/or V _q3 Maintaining the first, second, third, fourth and fifth channelsUnder the condition that the rotation speed of the rear roller and the rotation speed of the middle roller on the channel are not equal and are not zero (namely V _h (t)≠V _z (t) noteq0), regulating V by the controller _q1 (t):V _q2 (t):V _q3 The ratio of (t) can realize the online change of various pattern combinations on the fancy yarn; the flower shape includes, but is not limited to, knots, plaits, loops, etc.;

(1) when V is _q1 (t):V _q2 (t):V _q3 (t) = (1.15-1.3): (1.15-1.3) 1 in 1, the second component yarn, the fifth component yarn, the third component yarn and the fourth component yarn (decorative yarn [ (Y) ₂ +Y ₅ )+(Y ₃ +Y ₄ )]) The first component yarn and the sixth component yarn (core yarn Y) ₁ +X ₁ ) Forming a knot on the upper part;

(2) when V is _q1 (t):V _q2 (t):V _q3 (t) = (1.3-4): (1.3-4) at 1, the second component yarn, the fifth component yarn, the third component yarn and the fourth component yarn (decorative yarn [ (Y) ₂ +Y ₅ )+(Y ₃ +Y ₄ )]) The first component yarn and the sixth component yarn (core yarn Y) ₁ +X ₁ ) Forming a ring on the upper part;

(3) when V is _q1 (t):V _q2 (t):V _q3 (t) =1:1 (1.15-1.3), the first component yarn and the sixth component yarn (decorative yarn Y ₁ +X ₁ ) The mutual twisting and kinking is performed on the second component yarn, the fifth component yarn, the third component yarn and the fourth component yarn (core yarn [ (Y) ₂ +Y ₅ )+(Y ₃ +Y ₄ )]) Forming a knot on the upper part;

(4) when V is _q1 (t):V _q2 (t):V _q3 (t) =1:1 (1.3-4), the first component yarn and the sixth component yarn (decorative yarn Y ₁ +X ₁ ) The mutual twisting and kinking is performed on the second component yarn, the fifth component yarn, the third component yarn and the fourth component yarn (core yarn [ (Y) ₂ +Y ₅ )+(Y ₃ +Y ₄ )]) Forming a braid or a loop.

Third step of spinning fancy yarn with yarn-like pattern-like size changing in-line like knots, braids and loops

The size of the flower-shaped yarn knots, braids, loops and the like depends on the thickness and twist of the decorative yarn and the core yarn, and the overfeeding speed of the decorative yarn relative to the core yarn. When the knots are formed, the knots formed by twisting the fancy yarn with large coarse twist and the fancy yarn with small fine twist are larger; when the loop is formed, the loop formed by twisting the fancy yarn with large thick twist and large overfeeding ratio of the decorative yarn is larger than the fancy yarn with small thin twist and small feeding ratio of the decorative yarn; when the braid is formed, the braided braid formed by twisting the fancy yarn with large thick twist and large overfeeding ratio is longer than the fancy yarn with small thin twist and small feeding ratio.

By regulating and controlling the middle roller speed V in the first channel, the second channel, the third channel, the fourth channel and/or the fifth channel on line _z (t) and velocity V of the rear roller _h (t) further changing the linear density of the first component yarn, the second component yarn, the third component yarn, the fourth component yarn and/or the fifth component yarn and/or by regulating the speed V of the third front roller on line _q3 (t) thereby enabling an on-line variation of the size of the pattern on the fancy yarn.

The on-line variation of the pattern size on fancy yarns specifically includes:

(1) on-line regulation and control of fancy yarn knot size

the yarn density of the yarn at this time is:

(2) On-line regulation and control of fancy yarn loop size

When V is _q1 (t):V _q2 (t):V _q3 (t) = (1.3-4): (1.3-4) in 1, the second component yarn, the fifth component yarn, the third component yarn and the fourth component yarn are decorative yarns (decorative yarns [ (Y) ₂ +Y ₅ )+(Y ₃ +Y ₄ )]) The first component yarn and the sixth component yarn are core yarns (core yarn Y ₁ +X ₁ ) The decorative yarn is alternately twisted and kinked on the core yarn to form a loop;

the yarn density of the looped yarn was:

meanwhile, the overfeeding quantity of the decorative yarn relative to the core yarn speed is regulated and controlled, namely the speed V of the first front roller is regulated and controlled _q1 (t) and second front roller speed V _q2 (t) relative to the third front roller velocity V _q3 And (d) overfeeding the yarn in the step (t), wherein the overfeeding is large, the overfeeding is small, and the overfeeding is large, so that the size of the formed fancy yarn loop is regulated and controlled on line.

(3) On-line regulation and control of fancy yarn braid length

When V is _q1 (t):V _q2 (t):V _q3 When (t) =1:1, (1.3 to 4), the second component yarn, the fifth component yarn, the third component yarn and the fourth component yarn are core yarns (core yarn [ (Y) ₂ +Y ₅ )+(Y ₃ +Y ₄ )]) The first component yarn and the sixth component yarn are ornamental yarn (ornamental yarn Y ₁ +X ₁ ) The decorative yarn is alternately twisted on the core yarn to form a loop, and when the decorative yarn is a strong twisted yarn, the loop formed under the action of the self twisting stress of the decorative yarn is immediately twisted into a braid;

Spinning of fancy yarn with online change of flower type color such as knots, braids, loops and the like

The component yarns forming the decorative yarn are colored yarns, and the speeds of the middle roller shaft and the rear roller of the drafting zone (specifically, the speeds V of the rear roller shaft, the middle roller shaft, the first auxiliary shaft, the second auxiliary shaft and the third auxiliary shaft are regulated and controlled by a PLC _h (t)、V _z (t)、V _f1 (t)、V _f2 (t)、V _f3 And (t) adjusting the change of the blending ratio of the decorative yarn, and realizing the online change of the colors of the spun patterns (knots, braids, loops and the like) by adjusting the change of the blending ratio of the decorative yarn when the decorative yarn forms the patterns.

The flower-like yarn knots, braids, loops and the like can be varied depending on the color mixing ratio of the decorative yarn. If roving Y is used as decorative yarn ₂ 、Y ₅ 、Y ₃ 、Y ₄ The color roving can be selected from seven colors of roving such as red, orange, yellow, green, cyan, blue and purple, if the linear density is ρ ₂ 、ρ ₃ 、ρ ₄ 、ρ ₅ The blending ratio of the decorative yarn is K _h2 (t)、K _h3 (t)、K _h4 (t)、K _h5 (t) the following:

therefore, the speeds V of the middle roller shaft, the rear roller shaft, the first auxiliary shaft, the second auxiliary shaft and the third auxiliary shaft are regulated and controlled by the PLC _h (t)、V _z (t)、V _f1 (t)、V _f2 (t)、V _f3 And (t) adjusting the change of the blending ratio of the decorative yarn, and spinning fancy yarns with online change of flower colors such as knots, braids, loops and the like through the change of the blending ratio of the decorative yarn when the decorative yarn forms knots and loops.

4. Spinning of fancy yarn with color changing on line

The wrapping structure and the wrapping ratio of each component of the fancy yarn can be regulated and controlled by regulating and controlling the speeds of the rear roller, the middle roller and the speed of the three front rollers on the first channel, the second channel, the third channel, the fourth channel and/or the fifth channel through a PLC, so that the online color change of the fancy yarn can be regulated and controlled online.

The fancy yarn is formed by mutually wrapping core yarn, decorative yarn and fixed yarn, and when the wrapping structure and the wrapping proportion are changed on line, the color of the fancy yarn can be changed on line. According to formula (6) (7) (8) (9) (10), if six sliver ρ is fed during two twisting ₁ 、ρ ₂ 、ρ ₃ 、ρ ₄ 、ρ _x 、ρ _g The colors of the fancy yarn can be regulated and controlled by changing the coating ratio when the fancy yarn is respectively selected from red, orange, yellow, green, blue, purple, black, white and the like.

Coating ratio K of fancy yarn _h2 (t)、K _h3 (t)、K _h4 (t)、K _h5 (t) the linear density of the fancy yarn is ρ _hy (t) regulating and controlling the servo motor through the PLC and driving V _h (t)、V _z (t)、V _q1 (t)、V _q2 (t)、V _q3 (t)、V _R1 (t) making it satisfy the following formula:

V _h (t)＝K _h1 (t)*ρ _hy (t)/ρ ₁ (21)

V _z (t)＝C*K _h2 (t)*ρ _hy (t)/ρ ₂ (22)

V _f1 (t)＝K _h3 (t)*ρ _hy (t)/ρ ₃ (23)

V _f2 (t)＝K _h4 (t)*ρ _hy (t)/ρ ₄ (24)

V _R1 (t)＝K _h5 (t)*ρ _hy (t)/ρ _X (25)

therefore, the speed of the rear roller, the middle roller, the auxiliary roller and the front roller and the twist of the wrapping twist of the front roller can be regulated and controlled by the PLC, and the wrapping structure and the wrapping ratio of each component of the fancy yarn can be regulated and controlled, so that the online color change of the fancy yarn can be regulated and controlled online.

Example 3

The present embodiment is basically the same in structure as embodiment 1, except that:

as shown in fig. 6, the control system further includes a first comparing module, where the first comparing module is connected to the first sensor, the second sensor, the third sensor, the fourth sensor, the fifth sensor, and the controller, and the first comparing module is used to monitor a rotation speed ratio between the middle roller shaft 6, the rear roller shaft 4, the first auxiliary shaft 5, the second auxiliary shaft 9, and the third auxiliary shaft 10, and the controller adjusts and controls rotation speeds of the middle roller shaft 6, the rear roller shaft 4, the first auxiliary shaft 5, the second auxiliary shaft 9, and/or the third auxiliary shaft 10 according to a numerical value fed back by the first comparing module, so as to adjust and control blending ratios of the first component yarn, the second component yarn, the third component yarn, the fourth component yarn, and the fifth component yarn.

In order to accurately and rapidly realize yarn blending ratio regulation and control, the invention directly regulates and controls according to the numerical value fed back by the first comparison module, even if the rotation speeds of the middle roller shaft 6, the rear roller shaft 4 or the three auxiliary shafts respectively exceed the set error range due to various error reasons, the invention can continue production without additionally regulating the actual rotation speeds of the rear roller shaft 4, the middle roller shaft 6, the first auxiliary shaft 5, the second auxiliary shaft 9 and the third auxiliary shaft 10 as long as the rotation speed ratio of the five shafts fed back by the first comparison module (namely, the feeding speed ratio of the first component yarn, the second component yarn, the third component yarn, the fourth component yarn and the fifth component yarn) is ensured to be within the set error range.

The comparison module may be a prior art, may be an existing comparator or integrated comparison circuit, or may be a comparison module in the form of software in the controller CUP. The sensor is also in many forms, and can be, for example, a photoelectric encoder or a Hall rotation speed sensor.

In addition, the second comparison module is respectively connected with the sixth sensor, the seventh sensor, the eighth sensor and the controller, and is used for monitoring the rotation speed ratio among the three front rollers, and the controller regulates and controls the first front shaft, the second front shaft or the front roller shaft according to the numerical value fed back by the second comparison module, so as to regulate and control the pattern combination and the pattern size. Therefore, the control precision of the control system is further relaxed, the redundancy of system control is increased, the importance of the front roller rotating speed ratio on different channels is highlighted, the processing workload of the controller is greatly reduced, the control precision of the blending ratio of yarns is greatly improved, in addition, the shutdown or adjustment time in the production process is avoided, and the production efficiency of the equipment is improved.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims

1. The six-channel hollow spindle fancy yarn forming device is characterized by comprising a first channel for passing a first component yarn, a second channel for passing a second component yarn, a third channel for passing a third component yarn, a fourth channel for passing a fourth component yarn, a fifth channel for passing a fifth component yarn and a sixth channel for passing a sixth component yarn;

a hollow spindle is arranged at the second twisting point, the fancy yarn main body passes through the hollow spindle, the hollow spindle rotates rapidly, and the seventh component yarn on the hollow spindle is intersected with the fancy yarn main body and coats the fancy yarn main body;

the first rear roller and the first middle roller are connected through a first transmission gear set, and the first transmission gear set is used for keeping the traction ratio between the first middle roller and the first rear roller constant and not more than 1.4;

the second rear roller and the second middle roller are connected through a second transmission gear set, and the second transmission gear set is used for keeping the traction ratio between the second middle roller and the second rear roller constant and not more than 1.4;

The third rear roller and the third middle roller are connected through a third transmission gear set, and the third transmission gear set is used for keeping the traction ratio between the third middle roller and the third rear roller constant and not more than 1.4;

the fourth rear roller and the fourth middle roller are connected through a fourth transmission gear set, and the fourth transmission gear set is used for keeping the traction ratio between the fourth middle roller and the fourth rear roller constant and not more than 1.4;

the fifth rear roller and the fifth middle roller are connected through a fifth transmission gear set, and the fifth transmission gear set is used for keeping the traction ratio between the fifth middle roller and the fifth rear roller constant and not more than 1.4;

an upper leather roller is correspondingly arranged above the middle roller on the same channel among the first channel, the second channel and the third channel, and the yarn forming device also comprises an upper leather ring sleeved on the upper pin and the middle roller and keeping synchronous movement with the middle roller, and a lower leather ring sleeved on the lower pin and the middle roller and keeping synchronous movement with the middle roller; the distance between the holding jaws of the upper leather collar and the lower leather collar and the jaw line of the front roller is less than 3mm.

2. The apparatus according to claim 1, wherein the sixth channel further comprises a drawing roller, and wherein the drawing roller, the third front roller, the first twisting point, and the second twisting point are sequentially disposed.

3. The hollow spindle fancy yarn forming device of claim 1 further comprising a back roller shaft and a middle roller shaft;

in the circumferential direction of the rear roller shaft, the first rear roller is sleeved on the rear roller shaft in a relatively fixed manner, and the second rear roller, the third rear roller, the fourth rear roller and the fifth rear roller are sleeved on the rear roller shaft in a relatively rotatable manner;

4. The hollow spindle yarn forming device as in claim 1 further comprising a front roller shaft; in the circumferential direction of the front roller shaft, the first front roller and the second front roller are sleeved on the front roller shaft in a relatively rotatable manner, and the third front roller is sleeved on the front roller shaft in a relatively fixed manner.

5. The hollow spindle fancy yarn forming device of claim 1 wherein said first drive gear set comprises a first drive gear, a first bridge gear and a first driven gear which are sequentially meshed for transmission; the first driving gear is fixedly connected with the first rear roller in a coaxial manner, and the first driven gear is fixedly connected with the first middle roller in a coaxial manner;

6. The hollow spindle yarn forming device of claim 5 further comprising a first auxiliary shaft;

7. The apparatus for forming a fancy yarn of a hollow spindle as claimed in claim 6, further comprising a second auxiliary shaft and a third auxiliary shaft which are arranged in parallel with the first auxiliary shaft, wherein a transmission gear which is engaged with the fourth carrier gear is fixedly sleeved on the second auxiliary shaft; and a transmission gear meshed with the fifth intermediate gear is fixedly sleeved on the third auxiliary shaft.

8. The apparatus according to claim 4, further comprising a first front shaft and a second front shaft, wherein the first front shaft is connected to the first front roller through a first gear pair, the second front shaft is connected to the second front roller through a second gear pair, and the rotation speeds of the first front roller and the second front roller can be controlled by the first front shaft and the second front shaft, respectively.

9. The hollow spindle yarn forming device of claim 8 wherein said first gear train pair comprises: the first main gear and the first auxiliary gear are meshed with each other for transmission, the first main gear is fixedly sleeved on the first front shaft, and the first auxiliary gear is coaxially and fixedly connected with the first front roller;