CN109825917B

CN109825917B - Three-channel hollow spindle fancy yarn forming device and method

Info

Publication number: CN109825917B
Application number: CN201910192391.4A
Authority: CN
Inventors: 薛元; 卜华香; 徐华民; 吕明明
Original assignee: Wuxi Hexinmei New Material Technology Co ltd
Current assignee: Wuxi Hexinmei New Material Technology Co ltd
Priority date: 2019-03-13
Filing date: 2019-03-14
Publication date: 2024-05-24
Anticipated expiration: 2039-03-14
Also published as: CN109825917A

Abstract

The invention provides a three-channel hollow spindle fancy yarn forming device and a method, wherein the yarn forming device comprises a first channel, a second channel and a third channel; the channel is provided with a first twisting point and a second twisting point; the first component yarn, the second component yarn and the third component yarn are alternately twisted through first twisting points to form a fancy yarn main body; a hollow spindle is arranged at the second twisting point, and the fourth 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 carrying out alternating drafting, alternating twisting and cladding processes by 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 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 other technical means, and expands new varieties of fancy yarn.

Description

Three-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 three-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 three-channel hollow spindle spinning fancy yarn and a one-step forming method, which combine a decorative yarn, a core yarn and a solid yarn into a complex fancy yarn comprising a knot, a loop, a braid and other combined fancy 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 three-channel hollow spindle fancy yarn forming device provided by the invention comprises a first channel for passing a first component yarn, a second channel for passing a second component yarn and a third channel for passing a third component yarn;

The first channel is sequentially provided with a first back roller, a first middle roller, a first 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 second front roller, the first twisting point and the second twisting point; the area between the rear roller, the middle roller and the front roller on the first channel and the second channel is a drafting area;

a third front roller, the first twisting point and the second twisting point are sequentially arranged on the third channel; forming an interactive twisting triangle zone among the first front roller, the second front roller, the third front roller and the first twisting point; the first front roller, the second front roller and the third front roller respectively and independently move, and respectively introduce corresponding component yarns into an interactive twisting triangle;

One or more yarns in the first component yarn, the second component yarn and/or the third component yarn are led to the alternating twisting triangular area and twisted to form a fancy yarn main body;

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 fourth 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 fourth component yarn is wound on the yarn bobbin.

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

Further, the first back roller and the second back roller are coaxial and can be arranged in a relative rotation manner in the circumferential direction; the first middle roller and the second middle roller are coaxial and can be arranged in a relative rotation manner in the circumferential direction; the first front roller, the second front roller and the third front roller are coaxial and can be arranged in a relative rotation mode in the circumferential direction.

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 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.

Wherein preferably, the first component yarn and the second component yarn are decorative yarns, the third component yarn is core yarn, and the fourth component yarn is solid yarn.

Of course, the first component yarn, the second component yarn and the third component yarn, namely any one or any two of the first component yarn, the second component yarn and the third component yarn can be decorative yarn, and other yarns are core yarns, and can be freely adjusted according to the combination mode of the yarns when the yarn is applied.

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.

In the first channel and the second channel, a first-stage drafting unit (namely a first drafting zone) is formed between the middle roller and the rear roller, the front roller and the middle roller form a second-stage drafting unit (namely a second drafting zone), 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 of the middle roller and the rear roller of different channels is synchronously changed relative to the front roller in the channel, and the speed of the middle roller and the rear roller of different channels is alternately changed relative to the front roller, so that alternating drafting of two groups of rough yarns is realized. Particularly, the primary draft is pre-draft, the primary draft ratio e _h is constant C and is constant draft, the draft ratio e _h =C of the primary draft is less than or equal to 1.4, the continuity of the roving can be ensured, and a draft singular point can not be generated in the first draft 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.

Preferably, an upper leather roller is correspondingly arranged above the middle roller on the same channel in the first channel and the second 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.

The second-stage drafting e _q is 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 or the second channel, the channel yarn forms a drafting singular point in the second drafting zone when the second-stage drafting ratio e _q = infinity of the channel yarn, the distance delta between the drafting singular point and the jaws of the front roller is less than or equal to 3mm (the gauge between the rear roller and the middle roller in the prior art is generally greater than 25mm, the positions of the drafting singular point in the first drafting zone are randomly distributed between the middle roller and the rear roller, when the distance between the middle roller jaws of the drafting singular point exceeds 3mm, the time for the drafting singular point to be fed into the middle roller jaws again has an uncertain factor, if the matching is poor, or coarse detail is generated, or spinning broken ends are caused, the spinning becomes an unstable process, and the reliability and the spinning quality are affected. 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 third channel further comprises a drawing roller, and 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, a middle roller shaft and a front 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 is 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 is 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;

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;

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

Further, the yarn feeding 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 (namely the feeding speeds of the first component yarn and the second component yarn) can be respectively regulated and controlled through the first front shaft and the second front shaft.

Wherein the rear roller, the middle roller and the front roller are preferably 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, leather rings for belt transmission are arranged on the rear roller or the middle roller on the first channel and the second channel, and the leather rings are connected with a servo motor through a belt transmission mechanism; or the back roller or the middle roller on the first channel and the second channel are respectively and independently provided with a transmission gear structure, and then are connected with the servo motor through a speed reducing mechanism.

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 mode, and the second driven gear is fixedly connected with the second rear roller in a coaxial mode.

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 bridge shaft, and the first bridge gear and the second bridge gear are movably sleeved on the bridge shaft.

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.

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 front shaft, a fourth servo motor for driving the second front shaft, a fifth 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 front shaft, the second front shaft and the front roller shaft respectively.

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

Further, the device also comprises a twisting mechanism, wherein the twisting mechanism also comprises a special pipe and a grid ring; the first component yarn, the second component yarn and the third component yarn are gathered into a whisker strip through a gathering groove of the special-shaped tube.

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.

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 and the controller, the first comparison module is used for monitoring the rotation speed ratio between the middle roller shaft and the rear roller shaft, and the controller regulates and controls the rotation speed of the middle roller shaft or the rear roller shaft according to the numerical value fed back by the first comparison module, so that the blending ratio of the first component yarn and the second 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 rotation speeds of the middle roller shaft and the rear roller shaft respectively exceed the set error range due to various error reasons, the production can be continued without additionally regulating the actual rotation speeds of the middle roller shaft and the rear roller shaft as long as the rotation speed ratio of the middle roller shaft and the rear roller shaft fed back by the first comparison module (namely, the feeding speed ratio of the second component yarn and the first component yarn) is ensured to be in the set error range. Compared with the prior art, the invention only needs to monitor one parameter, thus widening the regulation and control precision of the middle roller and the back roller, increasing the redundancy of system control, highlighting the importance of the rotation speed ratio of the upper roller of different channels, greatly improving the control precision of the blending ratio of yarns while greatly reducing the processing workload of the controller, avoiding the shutdown or adjustment time in the production process, and improving 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 three-channel hollow spindle fancy yarn, which comprises a hollow spindle spinning yarn system with three-way spinning channels and two twisting points, wherein a first twisting point respectively outputs two paths of untwisted yarns and one path of spun yarns (or filaments) by three front rollers which are coaxial and have different rotating speeds, the two paths of untwisted yarns and the one path of spun yarns are alternately twisted in a twisting triangular area to form a fancy yarn main body, and a fourth component yarn (filaments) output by the hollow spindle and the formed fancy yarn main body are subjected to cladding twisting at a second twisting point to form fancy yarn comprising decorative yarns, core yarns and fixed yarns, so that the spinning of the hollow spindle fancy yarn by a one-step method of decorative yarns, core yarns and fixed yarns is realized;

In addition, through regulating and controlling the cooperative change of the speeds of the rear roller, the middle roller and the three front rollers, the fancy yarn with multiple structures such as single-twist coating, cross-twist coating, twining 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 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 fixed wire is regulated and controlled by regulating and controlling the speeds of the rear roller, the middle roller 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 three-channel hollow spindle fancy yarn forming device.

Further, through online regulation and control of the speeds of the rear roller, the middle roller and the three front rollers on the first channel and/or the second channel, single-twist cladding structure fancy yarns, cross-twist cladding structure fancy yarns and twining cladding structure fancy yarns can be spun respectively by synergizing input decorative yarns and core yarns;

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

Two untwisted strands or yarns are respectively led into the alternating twisting triangular area through two channels in the first channel, the second channel and the third channel, and are coated by fourth component yarns (solid yarns) 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 coating structure;

Three non-twisted strands or yarns are respectively led into the alternating twisting triangular area through the first channel, the second channel and the third channel, and are coated by fourth component yarns (solid yarns) at the second twisting point after non-constant-speed twisting is carried out at the first twisting point to form the twisting coating structure fancy yarns.

Further, the first component yarn, the second component yarn and the third component yarn are respectively led into the alternating twisting triangular region by a first front roller, a second front roller and a third front roller, wherein the component yarn (whisker strip) with the lowest front roller speed is core yarn of fancy yarn, the component yarn with the higher front roller speed is decorative yarn of fancy yarn, and the online change of the combination mode of the decorative yarn and the core yarn in the fancy yarn can be realized by online adjustment of 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 V _q1、V_q2 and V _q3 respectively, and by online regulating V _q1、V_q2 and/or V _q3, online variation of various pattern combinations on fancy yarns can be realized by regulating the ratio of V _q1(t):V_q2(t):V_q3 (t) under the condition that the rotational speeds of the rear roller and the middle roller on the first channel and the second channel are not equal and are not zero (i.e., V _h(t)≠V_z (t) notequal to 0).

Further, the flower shape includes, but is not limited to, knots, braids, loops, and the like.

Further, the on-line variation of the plurality of pattern combinations on the fancy yarn includes:

① When V _q1(t):V_q2(t):V_q3 (t) = (1.15-1.3): (1.15-1.3): 1, the first component yarn and the second component yarn (yarn finish Y ₁+Y₂) are alternately twisted and kinked to form a knot on the third component yarn (core yarn X ₁);

② When V _q1(t):V_q2(t):V_q3 (t) = (1.3-4): (1.3-4): 1, the first component yarn and the second component yarn (decorative yarn Y ₁+Y₂) are alternately twisted on the third component yarn (core yarn X ₁) to form a loop;

③ When V _q1(t):V_q2(t):V_q3 (t) =1:1, (1.15-1.3), the third component yarn (core yarn X ₁) is alternately twisted and kinked to form knots on the first component yarn and the second component yarn (decorative yarn Y ₁+Y₂);

④ When V _q1(t):V_q2(t):V_q3 (t) =1:1 (1.3-4), the third component yarn (core yarn X ₁) is alternately twisted and kinked to form a braid or loop on the first component yarn and the second component yarn (decorative yarn Y ₁+Y₂).

Further, the linear density of the first component yarn and/or the second component yarn is further changed by online regulating the speed V _z (t) of the middle roller and the speed V _h (t) of the rear roller in the first channel and/or the second channel, and/or the online regulating the speed V _q3 (t) of the third front roller, so that the online change of the pattern size on the fancy yarn can be realized.

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

① Regulation and control of fancy yarn knot size

When V _q1(t):V_q2(t):V_q3 (t) = (1.15-1.3): 1, the first component yarn and the second component yarn are decorative yarns, and the third component yarn is core yarn; the first component yarn and the second component yarn (decorative yarn Y ₁+Y₂) are alternately twisted and kinked to form knots on the third component yarn (core yarn X ₁), and the yarn density of the decorative yarn is:

The speed V _h(t)、V_z (t) of the middle roller and the rear roller on the first channel and/or the second channel is regulated and controlled by the PLC, the change of the linear density of the decorative yarn can be regulated and controlled, and the density of the decorative yarn is increased when the feeding speed of the middle roller and the rear roller is increased; the linear density of the decorative yarn is reduced when the feeding speed of the middle roller and the rear roller is reduced, thereby realizing the linear change of the size of the knot;

② Control of fancy yarn loop size

When V _q1(t):V_q2(t):V_q3 (t) = (1.3-3): (1.3-4): 1, the first component yarn and the second component yarn are decorative yarns, and the third component yarn is core yarn; the first component yarn and the second component yarn (decorative yarn Y ₁+Y₂) are alternately twisted and kinked on the third component yarn (core yarn X ₁) to form a loop; the yarn density of the yarn at this time is:

The speed V _h(t)、V_z (t) of the middle roller and the rear roller on the first channel and/or the second channel is regulated and controlled by the PLC, the change of the linear density of the decorative yarn can be regulated and controlled, 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;

Meanwhile, the overfeed quantity (overfeed of the decorative yarn relative to the core yarn speed) of the first component yarn and the second component yarn relative to the third component yarn is regulated, namely the overfeed quantity of the first front roller speed V _q1 (t) and the overfeed quantity of the second front roller speed V _q2 (t) relative to the third front roller speed V _q3 (t) are regulated, the overfeed quantity is large and the overfeed quantity is small under the looping condition, so that the size of the formed fancy yarn loop is regulated on line;

③ Control of fancy yarn braid length

When V _q1(t):V_q2(t):V_q3 (t) =1:1, (1.3-3), the first component yarn and the second component yarn are core yarns, and the third component yarn is decorative yarn; the third component yarn (decoration yarn X ₁) is alternately twisted on the first component yarn and the second component yarn (core yarn (Y ₁+Y₂)) to form a loop first, and when the third component yarn (decoration yarn X ₁) is a strong twist yarn, the loop formed by the third component yarn under the action of self-twisting stress is immediately twisted into a braid;

the overfeeding quantity of the rotating speed V _q3 (t) of the third front roller relative to the first front roller speed V _q1 (t) and the second front roller speed V _q2 (t) is regulated on line, namely the overfeeding quantity of the decorative yarn speed relative to the core yarn speed is regulated on line, and the braids are long when the overfeeding quantity is large and short when the overfeeding quantity is small, so that the length of the formed fancy yarn braids is regulated on line.

Further, the first component yarn and the second component yarn are color roving yarns, the linear densities of the first component yarn and the second component yarn are ρ ₁、ρ₂, and the blending ratio K _s1(t)、K_s2 (t) of the first component yarn and the second component yarn is as follows:

Therefore, the speed V _h(t)、V_z (t) of the middle roller and the rear roller on the first channel and/or the second channel is regulated and controlled by the PLC, the change of the blending ratio of the first component yarn and the second component yarn (namely the decorative yarn) can be regulated and controlled, and when the first component yarn and the second component yarn are used as the decorative yarn to form a pattern (such as knots, braids and circles), the online change of the pattern color can be realized through the change of the blending ratio of the first component yarn and the second component 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 rear roller, the middle roller and the three front rollers on the first channel and/or the second 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 drafting twisting cladding hollow spindle spinning yarn system.

The linear density of the first component yarn and the second component yarn used as the decorative yarn, the linear density of the third component yarn used as the core yarn and the linear density of the fourth component yarn used as the fixed yarn are respectively rho ₁、ρ₂、ρ_x、ρ_g, after alternating drafting, alternating twisting and fixed yarn cladding, the linear density of the fancy yarn is rho _hy, the three front roller speed, the rear roller speed, the middle roller speed and the core wire sending speed in the spinning process are respectively V _q1(t)、V_q2(t)、V_q3(t)、、V_h(t)、V_z(t)、V_R1 (t), and C=1.25 is the speed ratio of the middle roller and the rear roller in each channel. After alternating drafting, alternating twisting and coating of the yarn fixing of the yarn core yarn, the formed fancy yarn has the following structural parameters:

1. Blending ratio of yarn density of decorative yarn and first and second component yarns

2. Linear density of the third component yarn as core yarn:

3. Linear density of the fourth component yarn as solid yarn:

ρ_g(t)＝ρ_g (5)

4. Coating ratio of linear density of fancy yarn to four component 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 device provided in embodiment 1 of the present invention;

fig. 2 is a schematic view of first to third channels of the hollow spindle fancy yarn forming apparatus in example 1;

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

FIG. 4 is a schematic circuit diagram of a hollow yarn fancy yarn forming apparatus in example 1 of the present invention;

Fig. 5 is a circuit diagram showing a comparison module in the apparatus for forming a fancy yarn with a hollow spindle in example 2 of the present invention.

Reference numerals:

Y ₁ -a first component yarn; y ₂ -a second component yarn; x ₁ -third component yarn; g ₁ -fourth component yarn; r ₁ -drawing roller; r ₂ -hollow spindle; d ₁ -first twisting point; d ₂ -second twisting point; 41-a first rear roller; 42-a second rear roller; 51-a first idler gear; 52-a second intermediate gear; 61-a first middle roller; 62-a second middle roller; 71-a first front roller; 72-a second front roller; 73-a third front roller; 4-a rear roller shaft; 5-a bridge 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; 611-a first driven gear; 621-a second drive gear; 81-a first main gear; 711-first pinion; 111-a second main gear; 721-a second pinion; p ₄ -rear upper leather roller; p ₆ -middle epithelial roller; p ₇ -front epithelial roller; q ₁ -an upper apron; q ₂ -lower leather collar; z ₁ -upper pin; z ₂ -lower pin.

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 fig. 1 to 3, the three-way hollow spindle fancy yarn forming device provided in this embodiment includes a first channel a ₁B₁C₁D₁D₂ E for passing a first component yarn Y ₁, a second channel a ₂B₂C₂D₁D₂ E for passing a second component yarn Y ₂, and a third channel R ₁C₃D₁D₂ E for passing a third component yarn X ₁.

The first channel is provided with a first back roller 41, a first middle roller 61, a first front roller 71, a first twisting point D ₁ and a second twisting point D ₂ in sequence; the second channel is provided with a second back roller 42, a second middle roller 62, a second front roller 72, a first twisting point D ₁ and a second twisting point D ₂ in sequence; the area between the rear roller, the middle roller and the front roller on the first channel and the second channel is a drafting area. The third channel is sequentially provided with a drawing roller R ₁, a third front roller 73, a first twisting point D ₁ and a second twisting point D ₂; forming an interactive twisting triangle zone among the first front roller, the second front roller, the third front roller and the first twisting point; the first front roller, the second front roller and the third front roller respectively and independently move, and respectively introduce corresponding component yarns into an interactive twisting triangle; one or more yarns in the first component yarn, the second component yarn and/or the third component yarn are led to the alternating twisting triangular area and twisted to form a fancy yarn main body; the second twisting point D ₂ is provided with a hollow spindle R ₂, the fancy yarn main body passes through the hollow spindle R ₂, the hollow spindle R ₂ rotates rapidly, and the fourth component yarn G ₁ on the hollow spindle is intersected with the fancy yarn main body and coats the fancy yarn main body.

In addition, the embodiment also comprises a filament bobbin and a false twister, wherein the filament bobbin is sleeved on the hollow spindle and synchronously rotates along with the hollow spindle, and the fourth component yarn is wound on the filament bobbin. The false twister applies twisting force to the fancy yarn main body, so that the fancy yarn main body is twisted and is coated by the fourth component yarn.

Wherein the first back roller 41 and the second back roller 42 are coaxially arranged and can rotate relatively in the circumferential direction; the first middle roller 61 and the second middle roller 62 are coaxially arranged and can rotate relatively in the circumferential direction; the first front roller 71, the second front roller 72 and the third front roller 73 are coaxially arranged and can rotate relatively in the circumferential direction; the first component yarn, the second component yarn and the third component yarn are alternately twisted by a first twisting point D ₁ to form a fancy yarn main body; and through the second twisting point D ₂, the fourth component yarn carries out cladding twisting on the fancy yarn main body to form the fancy yarn.

In the present embodiment, the first front roller 71, the second front roller 72, and the third front roller 73 have the same outer diameter size. The first component yarn Y ₁ is a roving, the first channel comprises a drafting zone A ₁B₁C₁ and an alternate twisting triangle zone C ₁C₃C₂D₁D₂ E, the second component yarn Y ₂ is a roving, the second channel comprises a drafting zone A ₂B₂C₂ and an alternate twisting triangle zone C ₁C₃C₂D₁D₂ E, the third component yarn X ₁ is a core yarn, and the core yarn is led into the alternate twisting zone C ₁C₃C₂D₁D₂ E by traction of a drawing roller R ₁ and a third front roller 73; the fourth component yarn G ₁ is a fixed yarn, and the fixed yarn is led to a second twisting point D ₂ through a hollow spindle R ₂, then is crossed with the twined yarn of the decorative yarn core yarn through the second twisting point D ₂, and is coated.

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 yarn (comprising core yarn, decorative yarn and solid yarn) by implementing alternating drafting, alternating twisting and cladding processes by a one-step method, and simultaneously realizes the online change of the colors and the forms of the slub, the belly, the knots, the rings and the braids of the fancy yarn by regulating and controlling the linear density and the blending ratio of the decorative yarn, regulating and controlling the twist of the core yarn, regulating and controlling the switching of the core yarn and the decorative yarn and the like, and expands the new variety of the fancy yarn.

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 between the first middle roller 61 and the first back roller 41 constant and not more than 1.4; the second rear roller 42 and the second middle roller 62 are connected by a second transmission gear set, and the second transmission gear set is used for keeping the traction ratio between the second middle roller 62 and the second rear roller 42 constant and not more than 1.4.

Wherein, the upper part of each rear roller, middle roller and front roller is respectively provided with a rear upper leather roller P ₄, a middle upper leather roller P ₆ and a front upper leather roller P ₇, and the upper leather rollers are matched with the rollers below to clamp yarns.

Wherein preferably, on the same channel in the first channel and the second channel, an upper leather roller P ₆ is arranged above the middle roller, the yarn forming device also comprises an upper leather ring Q ₁ sleeved on the middle upper leather roller P ₆ and an upper pin Z ₁ and keeping synchronous movement with the middle roller, and a lower leather ring Q ₂ sleeved on the middle roller and a lower pin Z ₂ and keeping synchronous movement with the middle roller; the distance between the holding jaws of the upper leather collar Q ₁ and the lower leather collar Q ₂ and the jaw line of the front roller is smaller than 3mm.

The second-level drafting e _q is 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 or the second channel, the second-level drafting ratio e _q = infinity of the channel yarn forms a drafting singular point in the second drafting zone, and the distance delta between the drafting singular point and the jaw of the front roller 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.

Experimental statistics prove that the breakage rate of the yarn in the first drafting zone is zero, the occurrence probability of unstable points of the thickness mutation is reduced by 71% compared with the prior art, and meanwhile, the breakage rate of the yarn in the second drafting zone is reduced by 41%, and the occurrence probability of unstable points of the thickness mutation is reduced by 38% compared with the prior art.

As shown in fig. 1 and 3, the present embodiment further includes a rear roller shaft 4, a middle roller shaft 6, a front roller shaft 7, a first front shaft 8, and a second front shaft 11; in the circumferential direction of the rear roller shaft 4, the first rear roller 41 is sleeved on the rear roller shaft 4 in a relatively fixed manner by a key manner, and the second rear roller 42 is sleeved on the rear roller shaft 4 in a relatively rotatable manner by a bearing manner; in the circumferential direction of the middle roller shaft 6, the first middle roller 61 is 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; in the circumferential direction of the front roller shaft 7, the first front roller 71 and the second front roller 72 are rotatably sleeved on the front roller shaft 7, and the third front roller 73 is fixedly sleeved on the front roller shaft 7; the feeding speeds of the first component yarn, the second component yarn and the third component yarn can be respectively regulated and controlled through the rear roller shaft 4, the middle roller shaft 6 and the front roller shaft 7.

The first front axle 8 is connected with the first front roller 71 through a first gear transmission pair, the second front axle 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 axle 8 and the second front axle 11.

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 411 is fixedly connected with the first rear roller 41 coaxially, and the first driven gear 611 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 621 is fixedly connected with the second middle roller 62 coaxially, and the second driven gear 421 is fixedly connected with the second rear roller 42 coaxially. Wherein the first and second carrier gears 51 and 52 are respectively sleeved on the carrier shaft 5 through bearings.

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 111 and the second auxiliary gear 721 are meshed with each other, the second main gear 111 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. 4, 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 front shaft 8, a fourth servo motor for driving the second front shaft 11, a fifth servo motor for driving the front roller shaft 7 to rotate, and a spindle motor for driving the hollow spindle R ₂ to rotate;

the rotation speed sensor includes: the first sensor, the second sensor, the third sensor, the fourth sensor and the fifth sensor are used for monitoring the rotating speeds of the rear roller shaft 4, the middle roller shaft 6, the first front shaft 8, the second front shaft 11 and the front roller shaft 7 respectively, the spindle sensor is used for monitoring the rotating speed of the hollow spindle R ₂, and the false twister sensor is used for controlling the false twister.

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

In addition, a twisting-resistant leather roller can be arranged above the special pipe; a front upper leather roller is respectively arranged above the first front roller 71, the second front roller 72 and the third front roller 73, and the twist blocking leather roller rotates along with the front upper leather roller in the same direction through a twist blocking transmission gear set. The twist-resistant transmission gear set (not shown) comprises a twist-resistant driving gear, a twist-resistant bridging gear and a twist-resistant driven gear which are sequentially meshed and transmitted; the twist-resistant driving gear is fixedly connected with the coaxial center of the front upper leather roller, and the twist-resistant driven gear is fixedly connected with the coaxial center of the twist-resistant leather roller. Wherein, the transmission ratio of the twist-resistant transmission gear set is 0.741-0.909. The drafting ratio between the twisting-resistant leather roller and the front epithelial roller is 1.1-1.35, the strand gathering effect is improved through the micro-drafting ratio of the gathering area, and the straightening degree and the orientation degree of fibers in the yarns are further improved.

During spinning, various flower-type yarns were spun as follows:

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

In a twisting triangle area of a first twisting point, three front rollers which are coaxial and have the same outer diameter and different rotating speeds respectively output two paths of untwisted yarns and one path of spun yarns (or filaments), and the two paths of untwisted yarns and the one path of spun yarns are alternately twisted under the action of twisting force to form a main body of fancy yarns; and the third short fiber yarn (or filament) is outputted at the second twisting point and is subjected to cladding twisting with the main body of the formed fancy yarn to form the fancy yarn, so that the spinning of the hollow spindle fancy yarn by the trim, core yarn and solid yarn one-step method is realized.

2. Spinning of fancy yarn with online changing wrapping structure

The speeds of the rear roller, the middle roller and the three front rollers can be regulated and controlled on line, so that the single-twist cladding structure fancy yarn, the cross-twist cladding structure fancy yarn and the twining cladding structure fancy yarn can be spun respectively by synergically inputting the decorative yarn and the core yarn;

two untwisted strands or yarns are respectively led into the cross-twisting triangular area through two channels in the first channel, the second channel and the third channel, and are coated by fourth component yarns (solid yarns) at a second twisting point after being twisted at a non-constant speed at the first twisting point to form a cross-twisting coating structure fancy yarn;

⑴ Spinning of single-twist coated fancy yarn:

In the device of the invention, the first to three channels correspond to the first to three front rollers, and as the roving Y ₁ (namely the first component yarn) is output by the first front roller after being alternately drawn by the first channel, the yarn X ₁ (namely the third component yarn) is output by the third front roller by the third channel, and the roving Y ₂ (namely the second component yarn) is output by the second front roller after being alternately drawn by the second channel. At this time, the output strand is single-twisted at the first twisting point, and is covered by the solid thread G ₁ output from the hollow spindle at the second twisting point to form a single-twisted covered fancy yarn structure.

For example, the untwisted yarn after the first channel draft is single twisted at a first twisting point, and is covered with a (fourth component yarn) yarn-fixing G ₁ at a second twisting point to form a fancy yarn of a single-twist covered structure. In this way, a fancy yarn of three single twisted coated structures such as (Y ₁+G₁)、(Y₂+G₁)、(X₁+G₁) can be formed. The specific parameters are set as follows:

①V_h(t)≠0,V_q1(t)≠0,V_z(t)＝V_q2(t)＝V_q3 (t) =0, the roving Y ₁ is drawn into an untwisted yarn through a channel a, then single twisting is completed at a first twisting point, and the single twisting point is covered by a fixing thread G ₁ to form a fancy yarn with a single twisting covering structure;

②V_z(t)≠0,V_q2(t)≠0,V_h(t)＝V_q1(t)＝V_q3 (t) =0, then the roving Y ₂ is drawn into an untwisted sliver through a second channel, and then single twisting is completed at a first twisting point, and the single twisting point is covered by a fixing thread G ₁ to form a fancy yarn with a single twisting covering structure;

③V_q3(t)≠0,V_h(t)＝V_q1(t)＝V_h(t)＝V_q2(t)＝V_q3 (t) =0, then the core yarn X ₁ completes single twisting at the first twisting point and is covered by the fixing yarn G ₁ at the second twisting point to form a fancy yarn of a single twisting covered structure;

⑵ Spinning of the fancy yarn with the cross-twisting cladding structure:

The twisting cladding structure of the effect yarn is a structure of the effect yarn formed by twisting two non-twisted strands (or yarns) at a constant speed at a first twisting point and cladding the two non-twisted strands with a solid yarn at a second twisting point. In the device, the first to three channels correspond to the first to three front rollers, and as the roving Y ₁ is output by the first front roller after being alternately drawn through the first channel, the yarn X ₁ is output by the third front roller through the third channel, and the roving Y ₂ is output by the second front roller after being alternately drawn through the second channel. At this time, two strands are fed from two front rollers at the same speed and twisted at a first twisting point, and are covered with a fixing yarn G ₁ at a second twisting point to form a twisted yarn structure. In this way, a fancy yarn of [(Y₁+Y₂)+G₁]、[(Y₁+X₁)+G₁]、[(Y₂+X₁)+G₁]、[(Y₁+Y₂+X₁)+G₁] or the like can be formed with four types of intertwisting-clad structures.

⑶ Spinning of the twisting cladding structure fancy yarn:

The twist coating structure of the effect yarn is a structure of effect yarn in which three or more non-twisted strands (or yarns) are non-uniformly twisted at a first twisting point and are coated with a solid yarn at a second twisting point. The roving Y ₁ is output by a first front roller after being drawn alternately through a first channel, the yarn X ₁ is output by a third front roller through a third channel, and the roving Y ₂ is output by a second front roller after being drawn alternately through a second channel. At this time, three or more non-twisted strands (or yarns) are non-uniformly fed from the three front rollers, non-uniformly twisted at a first twisting point, and covered with a yarn fixing G ₁ at a second twisting point to form a twist-covered fancy yarn structure. In this way, a fancy yarn of a twist clad structure such as (Y ₁+X₁+Y₂+G₁) can be formed.

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

The on-line change of the pattern combination modes of the decorative yarn and the core yarn, the on-line change of the pattern combination modes of knots, braids, loops and the like, the on-line change of the pattern sizes of knots, braids, loops and the like, the on-line change of the pattern colors of knots, braids, loops and the like, and the spinning of the combined fancy yarn with changeable appearance forms can be realized by regulating and controlling the speeds of the rear roller, the middle roller and the three front rollers on line.

⑴ Fancy yarn spinning with online changing decorative yarn and core yarn combined mode

The first component yarn, the second component yarn and the third component yarn are respectively led into the alternating twisting triangular region by a first front roller, a second front roller and a third front roller, wherein the component yarn (whisker strip) with the lowest front roller speed is core yarn of fancy yarn, the component yarn with the higher front roller speed is decorative yarn of fancy yarn, and the online change of the combination mode of the decorative yarn and the core yarn in the fancy yarn is realized by online adjustment of the front roller feeding speed of the first component yarn, the second component yarn and/or the third component yarn.

For example, the roving Y ₁、Y₂ is alternately drawn through the first and second channels and then fed out from the first and second front rollers at V _q1(t)、V_q2 (t), and the yarn X ₁ is fed out from the third front roller at V _q3 (t). The yarn with the lowest front roller speed is generally used as the core yarn of the fancy yarn, and the yarn with relatively high speed is used as the decorative yarn of the fancy yarn. When V _q1 (t) is minimum, Y ₁ is a core yarn, X ₁ and Y ₃ are decorative yarns; when V _q2 (t) is minimum, Y ₂ is a core yarn, Y ₁ and X ₁) are decorative yarns; when V _q3 (t) is minimum, X ₁ is a core yarn, and Y ₁ and Y ₂ are decorative yarns. Therefore, the online change of the combination mode of the decorative yarn and the core yarn can be realized by regulating and controlling V _q1(t)、V_q2(t)、V_q3 (t) through the PLC.

⑵ Spinning of fancy yarn with combined online variation of patterns such as knots, braids, loops and the like

The speeds of the first front roller, the second front roller and the third front roller are V _q1、V_q2 and V _q3 respectively, and the on-line change of various pattern combinations on fancy yarns can be realized by regulating and controlling the speeds of V _q1、V_q2 and/or V _q3 on line under the condition that the rotating speeds of the rear roller and the middle roller on the first channel and the second channel are not equal and are not zero (namely V _h(t)≠V_z (t) is not equal to 0) and regulating and controlling the ratio of V _q1(t):V_q2(t):V_q3 (t) through a controller.

The flower shape includes, but is not limited to, knots, braids, loops, etc.

① When V _q1(t):V_q2(t):V_q3 (t) = (1.15-1.3): (1.15-1.3): 1, the first component yarn and the second component yarn (yarn finish Y ₁+Y₂) are alternately twisted and kinked on the third component yarn (core yarn X ₁) and form a knot;

⑶ Spinning of fancy yarn with yarn-like size changing in-line like knots, braids, loops, etc

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.

The on-line change of the pattern size on the fancy yarn can be realized by regulating and controlling the speed V _z (t) of the middle roller and the speed V _h (t) of the rear roller in the first channel and/or the second channel on line so as to change the linear density of the first component yarn and/or the second component yarn and/or regulating and controlling the speed V _q3 (t) of the third front roller on line.

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

① Regulation and control of fancy yarn knot size

② Control of fancy yarn loop size

③ Control of fancy yarn braid length

The overfeeding quantity of the rotating speed V _q3 (t) of the third front roller relative to the first front roller speed V _q1 (t) and the second front roller speed V _q2 (t) is regulated on line, namely the overfeeding quantity of the decorative yarn speed relative to the core yarn speed is regulated on line, and the braids are long when the overfeeding quantity is large and short when the overfeeding quantity is small, so that the on-line regulation of the length of the formed fancy yarn braids is realized;

⑷ Spinning of fancy yarn with on-line variation of flower-like color such as knots, braids, loops and the like

The flower-like yarn knots, braids, loops and the like can be varied depending on the color mixing ratio of the decorative yarn. If colored rovings are used as the roving Y ₁、Y₂, two colors of rovings can be arbitrarily selected from seven colors of rovings such as red, orange, yellow, green, cyan, blue, and violet.

The first component yarn and the second component yarn are respectively color roving, the linear densities of the first component yarn and the second component yarn are respectively rho ₁、ρ₂, and the blending ratio K _s1(t)、K_s2 (t) of the first component yarn and the second component yarn is respectively as follows:

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 three front rollers on the first channel and/or the second channel through the 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 the formulas (6), (7), (8), (9) and (10), if four yarns ρ ₁、ρ₂、ρ_x、ρ_g fed in the two twisting processes are respectively red, yellow, blue, black and other colors, the color of the fancy yarn can be regulated by changing the coating ratio. Assuming that the coating ratio of the fancy yarn is K _h1(t)、K_h2(t)、K_h3(t)、K_h4 (t), and the linear density of the fancy yarn is ρ _hy (t), the fancy yarn is driven at the speed of V _h(t)、V_z(t)、V_q1(t)、V_q2(t)、V_q3(t)、V_R1 (t) by a PLC (programmable logic controller) to meet the following formula:

V_h(t)＝K_h1(t)*ρ_hy(t)/ρ₁ (13)

V_z(t)＝C*K_h2(t)*ρ_hy(t)/ρ₂ (14)

V_f(t)＝K_h3(t)*ρ_hy(t)/ρ₃ (15)

V_R1(t)＝K_h4(t)*ρ_hy(t)/ρ_X (16)

Therefore, 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 three front rollers through the PLC, so that the online color change of the fancy yarn can be regulated and controlled online.

According to the three-channel hollow spindle fancy yarn forming device provided by the invention, a hollow spindle spinning yarn system with three-way spinning channels and two twisting points is constructed, two paths of untwisted yarns and one path of spun yarns (or filaments) are respectively output from three front rollers which are coaxial and have different rotating speeds at a first twisting point (a first twisting point D ₁), are subjected to alternate twisting in a twisting triangular area to form a fancy yarn main body, and the output third path of spun yarns (or filaments) and the formed fancy yarn main body are subjected to cladding twisting at a second twisting point (a second twisting point D ₂) 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, a core yarn and a fixed yarn one-step method is realized;

In addition, through regulating and controlling the speed change of the rear roller, the middle roller and the three front rollers, the fancy yarn with multiple structures such as single twist coating, cross twist coating, twining coating and the like is spun; the combination of the decorative yarn and the core yarn is changed on line by regulating and controlling the speed change of the rear roller, the middle roller and the three front rollers, the combination of the knot, the braid, the loop and the like is changed on line, the size of the knot, the braid, the loop and the like is changed on line, the color of the knot, the braid, the loop and the like is changed on line, and the combined fancy yarn with changeable appearance forms is spun; finally, the coating ratio of the core wire, the decorative wire and the fixed wire is regulated and controlled by regulating and controlling the speed change of the rear roller, the middle roller and the three front rollers, so that the color fancy yarn with online color change is spun, and the production efficiency is greatly improved.

Example 2

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

As shown in fig. 5, the control system further includes a first comparing module and a second comparing module, the first comparing module is respectively connected with the first sensor, the second sensor and the controller, the first comparing module is used for monitoring a rotation speed ratio between the middle roller shaft and the rear roller shaft, and the controller regulates and controls the rotation speed of the middle roller shaft or the rear roller shaft according to a numerical value fed back by the first comparing module, so as to regulate and control a blending ratio of the first component yarn and the second 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 and the rear roller shaft 4 respectively exceed the set error range due to various error reasons, the production can be continued without additionally regulating the actual rotation speeds of the middle roller shaft 6 and the rear roller shaft 4 as long as the rotation speed ratio of the middle roller shaft 6 and the rear roller shaft 4 fed back by the first comparison module (namely, the feeding speed ratio of the second component yarn and the first component yarn) is ensured to be in the set error range. Compared with the prior art, the invention only needs to monitor one parameter, thus widening the regulation and control precision of the middle roller and the back roller, increasing the redundancy of system control, highlighting the importance of the rotation speed ratio of the upper roller of different channels, greatly improving the control precision of the blending ratio of yarns while greatly reducing the processing workload of the controller, avoiding the shutdown or adjustment time in the production process, and improving the production efficiency of equipment by more than 30 percent.

The second comparison module is respectively connected with the third sensor, the fourth sensor, the fifth 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 that the pattern combination and the pattern size are regulated and controlled.

Further, the control precision of the control system is 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.

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.

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 three-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 and a third channel for passing a third 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 fourth 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;

An upper leather roller is correspondingly arranged above the middle roller on the same channel in the first channel and the second channel, and the yarn forming device also comprises an upper leather ring sleeved on the middle upper leather roller and the upper pin and kept in synchronous motion with the middle roller, and a lower leather ring sleeved on the middle roller and the lower pin and kept in synchronous motion 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 for forming a fancy yarn from a hollow spindle of claim 1 further comprising a filament bobbin, said filament bobbin being mounted on said hollow spindle and rotating synchronously with the hollow spindle, said fourth component yarn being wound on said filament bobbin.

3. The hollow spindle fancy yarn forming device of claim 1 further comprising a rear roller shaft, a middle roller shaft and a front 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 is sleeved on the rear roller shaft in a relatively rotatable manner;

4. The apparatus of claim 3, 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.

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 4 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;

7. The apparatus for forming a fancy yarn of a hollow ingot of claim 5 further comprising a bridge shaft, said first and second bridge gears being journaled on said bridge shaft.

8. The apparatus for forming a fancy yarn of a hollow spindle as claimed in claim 1 wherein the first front roller, the second front roller and the third front roller have the same outer diameter size.

9. A fancy yarn forming method using the three-way hollow spindle fancy yarn forming device as claimed in any one of claims 1 to 8.

10. The fancy yarn forming method of claim 9, wherein the speeds of the back roller, the middle roller and the three front rollers on the first channel and/or the second channel are regulated on line, so that the fancy yarn with the single twist coating structure, the fancy yarn with the cross twist coating structure and the fancy yarn with the winding coating structure can be spun respectively by the cooperative input decorative yarn and the core yarn;

a non-twisted strand or yarn is twisted at the first twisting point through the first channel, the second channel or the third channel, and is covered by the fourth component yarn at the second twisting point to form a single-twist wrapping structure fancy yarn;

Two untwisted strands or yarns are respectively led into the alternating twisting triangular area through two channels in the first channel, the second channel and the third channel, and are covered by a fourth 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 cross twisting cladding structure;

Three untwisted strands or yarns are respectively led into the alternating twisting triangular area through the first channel, the second channel and the third channel, and are coated by the fourth component yarn at the second twisting point after non-constant-speed twisting is carried out at the first twisting point to form the twisting coating structure fancy yarn.

11. The fancy yarn forming method of claim 10 wherein the first component yarn, the second component yarn and the third component yarn are respectively led into the alternating twisting triangle area by a first front roller, a second front roller and a third front roller, wherein the component yarn with the lowest front roller speed is the core yarn of the fancy yarn, the component yarn with the higher front roller speed is the decorative yarn of the 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.

12. The fancy yarn forming method of claim 11 wherein the speeds of said first front roller, second front roller and third front roller are respectively、/>And/>By on-line regulation/control、/>And/or/>By regulating and controlling the rotation speed of the back roller and the rotation speed of the middle roller on the first channel and the second channel under the condition that the rotation speeds of the back roller and the middle roller are not equal and are not zeroThe ratio of the pattern combination to the fancy yarn is realized.

13. A fancy yarn forming method as claimed in claim 12 wherein the pattern comprises knots, braids or loops.

14. The fancy yarn forming method of claim 12 wherein said first component yarn and second component yarn are decorative yarns and said third component yarn is core yarn;

The on-line variation of the various pattern combinations on the fancy yarn includes:

① When (when) When the yarn is of the first component (/ >)) And a second component yarn (/ >) Alternating twist and kink in third component yarn (/ >) Forming a knot on the upper part;

② When (when) When the yarn is of the first component (/ >)) And a second component yarn (/ >) Inter-twist on third component yarn (/ >)) Forming a ring on the upper part;

③ When (when) When the yarn is of the third component (/ >)) Alternating twist and kink in first component yarn (/ >) And a second component yarn (/ >) Forming a knot on the upper part;

④ When (when) When the yarn is of the third component (/ >)) Alternating twist and kink in first component yarn (/ >) And a second component yarn (/ >) Forming a braid or a loop.

15. Fancy yarn forming method as in claim 14, wherein the velocity of the middle roller in the first channel and/or the second channel is regulated on-lineAnd rear roller speed/>Further changing the linear density of the first component yarn and/or the second component yarn and/or regulating the speed/>, of the third front roller on lineThereby realizing the on-line variation of the pattern size on the fancy yarn.

16. The fancy yarn forming method of claim 15 wherein the on-line variation of the size of the pattern on the fancy yarn specifically comprises:

① Regulation and control of fancy yarn knot size

When (when)When the yarn is used, the first component yarn and the second component yarn are decorative yarns, and the third component yarn is core yarn; first component yarn (/ >)) And a second component yarn (/ >) Alternating twist and kink in third component yarn (/ >) Forming knots on the yarn, wherein the yarn has the following linear density:

Regulating and controlling the middle roller speed on the first channel and/or the second channel through a PLC And velocity of rear roller/>The change of the linear density of the decorative yarn can be regulated and controlled, and the density of the decorative yarn is increased when the feeding speed of the middle roller and the rear roller is increased; the linear density of the decorative yarn is reduced when the feeding speed of the middle roller and the rear roller is reduced, thereby realizing the linear change of the size of the knot;

② Control of fancy yarn loop size

When (when)When the yarn is used, the first component yarn and the second component yarn are decorative yarns, and the third component yarn is core yarn; first component yarn (/ >)) And a second component yarn (/ >) Alternating twist and kink in third component yarn (/ >) Forming a ring on the upper part; the yarn density of the yarn at this time is:

Regulating and controlling the middle roller speed on the first channel and/or the second channel through a PLC And velocity of rear roller/>Regulating and controlling the change of the linear density of the decorative yarn, wherein 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;

Meanwhile, the overfeeding quantity of the first component yarn and the second component yarn relative to the third component yarn is regulated and controlled, namely the speed of the first front roller is regulated and controlled And second front roller speed/>Relative to the third front roller speed/>The overfeed amount of (2) is large, and the overfeed amount is small, under the condition of looping, so that the size of the formed fancy yarn loop is regulated and controlled on line;

③ Control of fancy yarn braid length

When (when)When the yarn is used, the first component yarn and the second component yarn are core yarns, and the third component yarn is decorative yarn; third component yarn (/ >)) Alternately twining on the first component yarn (/ >) And a second component yarn (/ >) First forming loops, a third component yarn (/ >) In the case of a strong twist yarn, the yarn is of a third component (/ >)) The loop formed under the effect of self-twisting stress is immediately twisted into a braid;

On-line regulating and controlling the rotation speed of the third front roller Relative to the first front roller speed/>And a second front roller speedThe overfeed amount of the yarn is controlled on line, namely the overfeed amount of the decorative yarn speed relative to the core yarn speed is controlled on line, and the braid is long when the overfeed amount is large and short when the overfeed amount is small, so that the length of the formed fancy yarn braid is controlled on line.

17. The method of claim 16, wherein the first component yarn and the second component yarn are color rovings, and the first component yarn and the second component yarn have a linear density of color rovings, respectivelyThe blending ratio of the first component yarn and the second component yarn/>The method comprises the following steps:

(11)

(12)

therefore, the speed of the middle roller on the first channel and/or the second channel is regulated and controlled by the PLC And the speed of the back rollerThe change of the blending ratio of the first component yarn and the second component yarn can be regulated, and when the first component yarn and the second component yarn are used as decorative yarns to form patterns, the online change of the patterns can be realized through the change of the blending ratio of the first component yarn and the second component yarn.

18. The fancy yarn forming method of claim 16 wherein the wrapping structure of each component of the fancy yarn and the wrapping ratio thereof can be controlled by controlling the speeds of the back roller and the middle roller and the three front rollers on the first channel and/or the second channel, thereby controlling the color on-line change of the fancy yarn on line.