CN209741350U

CN209741350U - Four-channel alternating drafting twisting coating ring spindle fancy yarn forming device

Info

Publication number: CN209741350U
Application number: CN201920346816.8U
Authority: CN
Inventors: 刘曰兴; 薛元; 刘立霞; 乔传亮; 王玉平; 莫振恩; 刘成禄
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: 2019-12-06
Anticipated expiration: 2029-03-19

Abstract

the utility model provides a four-channel alternating drafting twisting coating ring spindle fancy yarn forming device, which comprises a first channel, a second channel, a third channel and a fourth channel; a first twisting point and a second twisting point are arranged on the channel; the first component yarn, the second component yarn and the third component yarn form a fancy yarn main body after being alternately twisted by a first twisting point; and through the second twisting point, the fourth component yarn is used for coating and twisting the patterned yarn main body to form the patterned yarn. The utility model discloses an alternating draft, mutual twisting and cladding technology are implemented to the one-step method, the one-step method of fancy yarn is spun, simultaneously through the speed of regulation and control decorative yarn and core yarn collaborative feeding twist point, the linear density and the blending ratio of regulation and control decorative yarn, the twist of regulation and control core yarn, the color of regulation and control core yarn and decorative yarn's switching etc. technical means realizes fancy yarn bamboo joint, big tripe, knot, circle, pigtail and the online change of form, expands out the new variety of fancy yarn.

Description

Four-channel alternating drafting twisting coating ring spindle fancy yarn forming device

Technical Field

The utility model belongs to the technical field of spinning technique among the textile engineering and specifically relates to a four-channel alternation draft twines twists with fingers fancy yarn forming device of cladding ring spindle.

Background

The fancy yarn generally comprises three components of core yarn, decorative yarn and fixing yarn, and the strength of the fancy yarn is usually ensured by the core yarn, so the core yarn needs higher strength; the pattern yarn form and color change is provided by the decorative yarn, so the decorative yarn generally adopts colored yarn, slub yarn, big-belly yarn and the like; the stability of the fancy yarn structure is tied and positioned by means of the fixing thread, so the fixing thread is generally thin and high in strength.

the ring twisting machine is mainly used for making fancy yarn by using ring twisting equipment. The ring spinning method for producing fancy yarn usually adopts three-step method, firstly, respectively spinning core yarn, decorative yarn and fixing yarn; secondly, twisting the decorative yarn and the core yarn in a Z twist mode, forming overfeed on the core yarn, and forming different fancy types by controlling the overfeed amount; and thirdly, carrying out secondary plying and twisting on the folded yarn of the fixed yarn and the decorative yarn core yarn by S twisting to form the fancy yarn.

The main problems of ring spinning for producing fancy yarn are as follows:

1. Low production efficiency

the ring spindle fancy twister generally belongs to a multi-step forming process for producing fancy yarns, deformation of decorative yarn patterns is easy to cause in the secondary twisting process, the spinning speed is low during stranding and twisting, and the production efficiency of the ring spindle fancy twister is low;

2. The variety of the spun fancy yarn is limited

the ring spindle fancy twister is mainly used for spinning fiber type slub yarns, big-belly yarns and yarn type knot yarns, is rarely used for producing yarn type big-belly yarns, ring yarns and braid yarns, and cannot be used for producing fiber type big-belly yarns, ring yarns and braid yarns, so that the variety of spinnable fancy yarns is limited.

3. The structure, shape and color of the fancy yarn can hardly change, and the fancy yarn can not change on line.

because the ring spindle fancy twister twists the core yarn, the decorative yarn and the fixed yarn into the fancy yarn through secondary wrapping, the wrapping structure, the shape, the color, the style and the hand feeling of the fancy yarn are difficult to change on line through the regulation and control of spinning equipment and a spinning process in the spinning process of the fancy yarn, and the requirements of fancy yarn garment materials with various shape changes, rich and fine colors and agile style cannot be met.

SUMMERY OF THE UTILITY MODEL

an object of the utility model is to provide a device and one-step method forming method of four-channel ring spindle spinning fancy yarn, through processes such as reversal draft-carry in coordination-mutual twist and cladding, decorate yarn, core yarn and solid yarn combination to contain complex fancy yarn of combination flower type such as knot, circle, pigtail to solve at least one technical problem who exists among the prior art.

in order to solve the technical problem, the utility model provides a four-channel alternating drafting twisting coating ring spindle fancy yarn forming device, which comprises a first channel for the first component yarn to pass through, a second channel for the second component yarn to pass through, a third channel for the third component yarn to pass through and a fourth channel for the fourth component yarn to pass through;

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

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

The fourth channel is sequentially provided with a leading-in roller and the second twisting point;

The regions between the rear roller, the middle roller and the front roller on the first channel and the second channel are drafting regions, and an interactive twisting triangular region is formed 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 move independently and respectively introduce the corresponding component yarns into the interactive twisting triangular area;

one or more yarns of the first component yarn, the second component yarn and/or the third component yarn are introduced to the interactive twisting triangular area and then twisted to form a fancy yarn main body;

And the fourth component yarn is led to the second twisting point through the leading-in roller, is intersected with the fancy yarn main body and wraps the fancy yarn main body.

Furthermore, the first back roller and the second back roller are coaxial and can rotate relatively in the circumferential direction; the first middle roller and the second middle roller are coaxial and can rotate relatively in the circumferential direction; the first front roller, the second front roller and the third front roller are coaxial and can rotate relatively in the circumferential direction.

the utility model discloses break through the technical bottleneck of ring spinning in the aspect of fancy yarn shaping, implement the reversal draft through the one-step method, in coordination with the output, alternately twine and twist with the cladding technology, fancy yarn (containing core yarn, decoration yarn and solidus) one-step method system of spinning has been realized, simultaneously through the output speed of regulation and control decoration yarn and core yarn, the linear density and the blending ratio of regulation and control decoration yarn, the twist of regulation and control core yarn, technological means such as the switching of regulation and control core yarn and decoration yarn realize fancy yarn slub, big tripe, the knot, the circle, the color of braid and the online change of form, expand the new variety of fancy yarn.

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 roles of the first component yarn, the second component yarn and the third component yarn, even including the fourth component yarn, are opposite, that is, any one or two of the first component yarn, the second component yarn and the third component yarn can be the decoration yarn, and the other yarns are the core yarns, and when the yarn is applied, the yarn can be freely adjusted according to the combination mode of the yarns.

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

the second back roller is connected with the second middle roller 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 back roller constant and not more than 1.4.

the utility model provides an in first passageway and the second passageway, form one-level draft unit (being first draft district) between well roller and the back roller, preceding roller and well roller constitute second grade draft unit (being second draft district), and the well, back roller velocity ratio of same passageway is invariable and be less than 1.4 to and the synchronous variable speed of preceding roller in this passageway relatively, the well, back roller of different passageways change speed in turn relatively, realize the reversal draft to two sets of slubs. The first-level drafting is pre-drafting, the constant C is the first-level drafting ratio eh, the constant C is the constant drafting ratio eh of the first-level drafting is not more than 1.4, the continuity of the roving can be ensured, and no drafting singular point can 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 for slippage in the main drafting process is made, the end 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 middle leather roller is correspondingly arranged above the middle roller on the same channel of the first channel and the second channel, the yarn forming device further comprises an upper leather collar which is sleeved on the upper middle leather roller and the upper pin and keeps synchronous motion with the middle roller, and a lower leather collar which is sleeved on the middle roller and the lower pin and keeps synchronous motion with the middle roller; the distance between the holding jaw of the upper leather ring and the holding jaw of the lower leather ring and the front roller jaw line is less than 3 mm.

the secondary draft eq is a dynamic main draft, the speed of the middle roller is changed relative to the front roller, when the blending ratio K of one component yarn in the first channel or the second channel is 0 percent, when the secondary draft ratio eq of the channel yarn is ∞, the channel yarn forms a draft singular point in a second draft zone, the distance delta between the draft singular point and the jaw of the front roller is less than or equal to 3mm (in the prior art, the gauge between the rear roller and the middle roller is generally greater than 25mm, the draft singular point position of the first draft zone is randomly distributed between the middle roller and the rear roller, when the draft singular point distance exceeds 3mm from the jaw of the middle roller, the time for the draft singular point to be fed into the jaw of the middle roller again has an uncertain factor, if the matching is not good, coarse details are generated, or the spinning ends are broken, so that the spinning becomes an unstable process, and the reliability of the spinning and the quality of the finished yarn are influenced). When K is gradually increased, the slivers held by the upper and lower leather rings are instantaneously fed into the jaw of the front roller to carry out secondary drafting along with the synchronous start of the rear roller and the middle roller, so that the drafting singular points in a secondary drafting zone can not influence the stability of spinning.

Further, the third channel further comprises a leading-out roller, and the leading-out roller, the third front roller, the first twisting point and the second twisting point are sequentially arranged.

furthermore, 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, in a key manner), and the second rear roller is sleeved on the rear roller shaft in a relatively rotatable manner (for example, in a bearing manner);

in the circumferential direction of the middle roller shaft, the first middle roller can be 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 can be 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 (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 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 back roller, the middle roller and the front roller are preferably nested rollers.

of course, the driving modes of the back 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 back roller and 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 rear rollers or the middle rollers on the first channel and the second channel are respectively and independently provided with a transmission gear structure and then connected with the servo motor through a speed reducing mechanism.

further, the first transmission gear set comprises a first driving gear, a first intermediate 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 in meshing 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 transmission pair includes: the first main gear and the first pinion are in meshed transmission with each other, the first main gear is fixedly sleeved on the first front shaft, and the first pinion is fixedly connected with the first front roller in a coaxial manner;

The second gear transmission pair comprises: the second main gear and the second pinion of intermeshing transmission, the fixed suit of second main gear be in on the second front axle, the second pinion with roller coaxial axle fixed connection before the second.

Further, the gear box further comprises an intermediate shaft, and the first intermediate gear and the second intermediate gear are movably sleeved on the intermediate shaft.

Wherein, each back roller, middle roller and preceding roller top correspond respectively to be provided with the epitheca roller, and the epitheca roller is used for grasping the yarn with the roller cooperation of below.

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 the servo driver in sequence;

the servo motor includes: the first servo motor is used for driving the rear roller shaft to rotate, the second servo motor is used for driving the middle roller shaft to rotate, the third servo motor is used for driving the first front shaft, the fourth servo motor is used for driving the second front shaft, the fifth servo motor is used for driving the front roller shaft to rotate, and the yarn fixing servo motor is used for driving the leading-in roller to rotate;

The rotation speed sensor includes: the first sensor, the second sensor, the third sensor, the fourth sensor and the fifth sensor are respectively 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, and the yarn fixing sensor is used for monitoring the rotating speed of the leading-in roller.

The utility model provides a controller loops through the feeding speed of four component yarns on four yarn passageways of servo driver and servo motor control, and the actual feeding speed of four component yarns of rotational speed sensor real-time supervision to feed back the monitoring value to the controller, the controller can be according to the size of control signal on four yarn passageways of monitoring value adjustment.

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 strand through a gathering groove of the special-shaped pipe.

further, the twisting mechanism comprises a ring plate and a spindle;

The controller controls the movement of the ring plate through a servo driver and a servo motor, and is connected with the spindle through a frequency converter and an alternating current motor; and further comprising a spindle sensor for monitoring the spindle rotational speed.

in addition, the control system also includes a series of instructions and modular programs.

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 a value fed back by the first comparison module, so as to regulate and control the blending ratio of the first component yarn and the second component yarn.

realize yarn blending ratio regulation and control for the accuracy and fast, the utility model discloses direct numerical value according to first comparison module feedback is regulated and control, even if because various error reasons lead to well roller axle and back roller axle rotational speed to surpass respectively and set for error range, as long as guarantee well roller axle and the back roller axle rotational speed ratio (be the feeding speed ratio of second component yarn and first component yarn) of first comparison module feedback in setting for error range, can continue to produce and need not additionally adjust the actual rotational speed of well roller axle and back roller axle. Compared with the prior art, a plurality of parameters such as roller and back roller compare in need monitoring simultaneously, the utility model discloses only need monitor a parameter, widened well roller and back roller regulation and control precision, increased system control's redundancy, and highlighted the importance of roller rotational speed ratio on the different passageways, still improved the blending ratio control accuracy of yarn greatly when the work load greatly reduced that the controller handled, in addition, avoided shutting down or adjust time in the production process, the production efficiency of equipment improves more than 30%.

The comparison module may be a conventional comparator, an integrated comparison circuit, or a comparison module in software in the controller cpu. The sensor is also in many forms, and may be, for example, a photoelectric encoder or a hall revolution speed sensor.

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

Adopt above-mentioned technical scheme, the utility model discloses following beneficial effect has:

the utility model provides a pair of adopt above-mentioned four passageway reversal drafting to twine twisting cladding ring spindle fancy yarn forming device, through the ring spindle spinning system who has four ways spinning passageway and two twisting points of construction, at first twisting point (first twisting point department) by three coaxial and different rotational speed's preceding roller output respectively two way no twist yarn strip and short fiber yarn (or filament) of the same way accomplish mutual twist and form fancy yarn main part in the twisting triangular space, carry out the cladding twist by the fourth way short fiber yarn (or filament) of output and the fancy yarn main part that has formed at second twisting point (second twisting point department), form the fancy yarn that contains decoration yarn, core yarn and solid yarn, realize the spinning of decoration line, heart yearn, the solid one-step method ring spindle fancy yarn;

in addition, by regulating and controlling the speed of the rear roller, the middle roller and the three front rollers to cooperatively change, fancy yarns with multiple structures such as single-twist coating, alternate-twist coating, winding-twist coating and the like are spun; and through regulating and controlling the speed of the back roller, the middle roller and the three front rollers to change cooperatively, the combination of the decoration yarn and the core yarn is changed online, the combination of patterns such as knots, braids and loops is changed online, the sizes of the patterns such as the knots, the braids and the loops are changed online, the colors of the patterns such as the knots, the braids and the loops are changed online, and the combined fancy yarn with changeable appearance forms is spun; finally, the coating ratios of the core wire, the decoration wire and the solid wire are regulated and controlled by regulating and controlling the speeds of the rear roller, the middle roller and the three front rollers to cooperatively change, the colored fancy yarns with online color change are spun, and the production efficiency is greatly improved.

in addition, the utility model also discloses a fancy yarn forming method of adopting above-mentioned four passageway reversal drafting to twine fancy yarn forming device of twisting cladding ring spindle.

Further, the speeds of the rear roller and the middle roller and the three front rollers on the first channel and/or the second channel are regulated and controlled on line, so that the fancy yarns with the single-twist coating structure, the fancy yarns with the alternate-twist coating structure and the fancy yarns with the winding-twisting coating structure can be respectively spun by cooperatively inputting the decorative yarns and the core yarns;

Twisting an untwisted strand or yarn at the first twisting point through the first channel, the second channel or the third channel, and covering the untwisted strand or yarn at the second twisting point by fourth component yarn (solid yarn) to form single-twist covered structured 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 and the third channel, and are twisted at a constant speed at the first twisting point, and then are wrapped by fourth component yarns (solid yarns) at the second twisting point to form fancy yarns with an alternate twisting and wrapping structure;

The three untwisted strands or yarns are respectively led into the interactive twisting triangular area through the first channel, the second channel and the third channel, and are twisted at a non-constant speed at the first twisting point, and then are wrapped by the fourth component yarn (solid yarn) at the second twisting point to form the fancy yarn with the twisting and wrapping structure.

furthermore, the first component yarn, the second component yarn and the third component yarn are respectively led into the interactive twisting triangular area through a first front roller, a second front roller and a third front roller, wherein the component yarn (strand) with the lowest speed of the front rollers is core yarn of fancy yarn, the component yarn with the higher speed of the front rollers is decoration yarn of the fancy yarn, and the online change of the combination mode of the decoration yarn and the core yarn in the fancy yarn can be realized by adjusting the feeding speeds of the three front rollers online.

Further, the speeds of the first front roller, the second front roller and the third front roller are respectively Vq1, Vq2 and Vq3, and under the condition that the rotation speed of the rear roller and the rotation speed of the middle roller on the first channel and the second channel are not equal and are not zero (namely Vh (t) ≠ Vz (t) ≠ 0) through online control of Vq1, Vq2 and/or Vq3, the ratio of Vq1(t): Vq2(t): Vq3(t) is controlled through a controller, so that online change of various pattern combinations on the fancy yarns can be realized.

further, the patterns include, but are not limited to, knots, braids, loops, and the like.

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

when Vq1(t): Vq2(t): Vq3 (t): 1.15-1.3), the first component yarn and the second component yarn (the finish yarn Y1+ Y2) are alternately twisted and kinked on the third component yarn (the core yarn X1) and form a knot;

② when Vq1(t) is Vq2(t) and Vq3(t) is (1.3-4) and (1.3-4) is 1, the first component yarn and the second component yarn (the decorative yarn Y1+ Y2) are alternately twisted on the third component yarn (the core yarn X1) to form loops;

③ when Vq1(t) Vq2(t) Vq3(t) is 1:1 (1.15-1.3), the third component yarn (core yarn X1) is alternately twisted and kinked to form knots on the first and second component yarns (lace yarn Y1+ Y2);

When Vq1(t) is Vq2(t) and Vq3(t) is 1:1 (1.3-4), the third component yarn (core yarn X1) is alternately twisted and kinked to form a braid or loop on the first component yarn and the second component yarn (face yarn Y1+ Y2).

Further, the linear density of the first component yarn and/or the second component yarn is changed by online regulating and controlling the speed Vz (t) of the middle roller and the speed Vh (t) of the rear roller in the first channel and/or the second channel, and/or the online regulating and controlling the speed Vq3(t) of the third front roller, so that the online change of the pattern size on the fancy yarn can be realized.

further, the online variation of the pattern size on the fancy yarn specifically comprises:

Regulating size of yarn knot

When Vq1(t) is Vq2(t) and Vq3(t) is (1.15-1.3) and (1.15-1.3) is 1, the first component yarn and the second component yarn are decoration yarns, and the third component yarn is core yarn; the first component yarn and the second component yarn (the cover yarn Y1+ Y2) were alternately twisted and twisted to form knuckles on the third component yarn (the core yarn X1), when the linear density of the cover yarn was:

The speeds Vh (t) and Vz (t) of the middle roller and the back roller on the first channel and/or the second channel are regulated and controlled by a PLC (programmable logic controller), the change of the linear density of the decoration yarns can be regulated and controlled, and the linear density of the decoration yarns is increased when the feeding speed of the middle roller and the back 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, so that the linear change of the size of the knot is realized;

② regulating and controlling size of fancy yarn ring

when Vq1(t) is Vq2(t) and Vq3(t) is (1.3-3) and (1.3-4) is 1, the first component yarn and the second component yarn are decoration yarns, and the third component yarn is core yarn; the first component yarn and the second component yarn (the finish yarn Y1+ Y2) are alternately twisted and kinked to form loops on the third component yarn (the core yarn X1); the linear density of the decorative yarn is as follows:

The speeds Vh (t) and Vz (t) of the middle roller and the back roller on the first channel and/or the second channel are regulated and controlled by a PLC (programmable logic controller), the change of the linear density of the decoration yarns can be regulated and controlled, and the linear density of the decoration yarns is increased when the feeding speed of the middle roller and the back 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 amount of the first component yarn and the second component yarn relative to the third component yarn (overfeeding of the decorative yarn relative to the core yarn speed) is regulated, namely the overfeeding amount of the first front roller speed Vq1(t) and the second front roller speed Vq2(t) relative to the third front roller speed Vq3(t) is regulated, and the loop is large when the overfeeding amount is large and the loop is small when the overfeeding amount is small under the looping condition, so that the size of the loop of the fancy forming yarn is regulated and controlled on line;

Regulating and controlling length of fancy yarn plait

When Vq1(t) is Vq2(t) and Vq3(t) is 1:1 (1.3-3), the first component yarn and the second component yarn are core yarns, and the third component yarn is a decorative yarn; the third component yarn (the decoration yarn X1) is alternately twisted on the first component yarn and the second component yarn (the core yarn (Y1+ Y2)) to form a loop at first, and when the third component yarn (the decoration yarn X1) 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;

And (3) online regulating and controlling the overfeed amount of the rotating speed Vq3(t) of the third front roller relative to the speed Vq1(t) of the first front roller and the speed Vq2(t) of the second front roller, namely online regulating and controlling the overfeed amount of the linear speed of the decorative yarn relative to the linear speed of the core yarn, wherein if the overfeed amount is large, the braid is long, and if the overfeed amount is small, the braid is short, so that the online regulating and controlling of the length of the braid of the fancy forming yarn is realized.

further, the linear densities of the first component yarn and the second component yarn which are respectively colored roving yarn and the first component yarn and the second component yarn are respectively rho 1 and rho 2, and the blending ratios Ks1(t) and Ks2(t) of the first component yarn and the second component yarn are respectively as follows:

therefore, the speeds Vh (t) and Vz (t) of the middle roller and the back roller on the first channel and/or the second channel are regulated and controlled by the PLC, the change of the blending ratio of the first component yarn and the second component yarn (namely the decoration yarn) can be regulated and controlled, and when the first component yarn and the second component yarn are used as the decoration yarn to form patterns (such as knots, braids and loops), the online change of the colors of the patterns can be realized through the change of the blending ratio of the first component yarn and the second component yarn.

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

the following explains the structural parameters of the fancy yarn formed by the alternating drafting, winding and twisting covered ring spinning system.

Assuming that the linear densities of the first component yarn and the second component yarn as the face yarn, the third component yarn as the core yarn, and the fourth component yarn as the solid yarn are ρ 1, ρ 2, ρ x, and ρ g, respectively, after the alternate drafting, the alternate twisting, and the solid yarn covering, the linear density of the fancy yarn is ρ hy, three front roller speeds, a rear roller speed, a middle roller speed, and a core yarn feeding speed in the spinning process are Vq1(t), Vq2(t), Vq3(t), vh (t), vz (t), and VR1(t), respectively, and C1.25 is a speed ratio of the middle roller and the rear roller in each passage. After the alternate drafting, alternate twisting and yarn fixing cladding of the decorative yarn core yarn, the structural parameters of the formed fancy yarn are as follows:

1. The linear density of the decorative yarn and the blending ratio of the first and second component yarns

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

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

ρ(t)＝ρ (5)

4. Linear density of fancy yarn and coating ratio of four component yarns

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments or the description in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a ring-shaped fancy yarn forming device provided in embodiment 1 of the present invention;

Fig. 2 is a schematic view of the first to three channels of the ring-spun fancy yarn forming apparatus of embodiment 1;

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

Fig. 4 is a schematic circuit diagram of a middle ring spindle fancy yarn forming device in embodiment 1 of the present invention;

Fig. 5 is a circuit diagram of a comparison module in the middle ring spindle fancy yarn forming device in embodiment 2 of the present invention.

Reference numerals:

y1 — first component yarn; y2-second component yarn; x1-third component yarn; g1-fourth component yarn; r1-draw-off roller; r2-draw-in roller; d1 — first twist point; d2 — second twist point; 41-a first back roller; 42-a second back roller; 51-a first carrier gear; 52-second carrier 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-rear roller shaft; 5-a bridge shaft; 6-medium roller shaft; 7-front roller shaft; 8-a first front axle; 11-a second front axle; 411 — a first drive gear; 421-a second driven gear; 611 — a first driven gear; 621-a second driving gear; 81-a first main gear; 711-first counter gear; 111-a second main gear; 721-a second counter gear; p4-posterior epithelial roll; p6-middle upper leather roller; p7-anterior epithelial roller; q1-epithelial ring; q2-lower leather collar; z1-up pin; z2-lower pin.

Detailed Description

the technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

As shown in fig. 1 to 3, the four-channel alternative drafting and twisting covered ring spindle fancy yarn forming device provided by the embodiment includes a first channel A1B1C1D 1D2E for the first component yarn Y1 to pass through, a second channel A2B2C 2D1D2E for the second component yarn Y2 to pass through, a third channel R1C 3D 1D2E for the third component yarn X1 to pass through, and a fourth channel R2D2E for the fourth component yarn G1 to pass through.

the first channel is sequentially provided with a first rear roller 41, a first middle roller 61, a first front roller 71, a first twisting point D1 and a second twisting point D2; the second channel is sequentially provided with a second back roller 42, a second middle roller 62, a second front roller 72, a first twisting point D1 and a second twisting point D2; the third channel is sequentially provided with a leading-out roller R1, a third front roller 73, a first twisting point D1 and a second twisting point D2; a leading-in roller R2 and a second twisting point D2 are sequentially arranged on the fourth channel; the first back roller 41 and the second back roller 42 are coaxial and can relatively rotate in the circumferential direction; the first middle roller 61 and the second middle roller 62 are coaxial and can relatively rotate in the circumferential direction; the first front roller 71, the second front roller 72 and the third front roller 73 are coaxial and can relatively rotate 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 D1 to form a fancy yarn main body; and through the second twisting point D2, the fourth component yarn covers and twists the pattern yarn main body to form the pattern 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. The first component yarn Y1 is roving, the first channel comprises a drafting zone A1B1C1 and an alternate twisting triangular zone C1C3C2D1D2E, the second component yarn Y2 is roving, the second channel comprises a drafting zone A2B2C2 and an alternate twisting triangular zone C1C3C2D1D2E, the third component yarn X1 is core yarn, and the core yarn is drawn by a drawing roller R1 and a third front roller 73 and is introduced into the alternate twisting zone C1C3C2D1D 2E; the fourth component yarn G1 is a fixed yarn, the fixed yarn is led to a second twisting point D2 (namely a fixed yarn wrapping point) through a lead-in roller R2, and then passes through the second twisting point D2 to be intersected with the twisted yarn of the decoration yarn core yarn and wrap the same.

The utility model discloses break through the technical bottleneck of ring spinning in the aspect of fancy yarn shaping, implement the reversal draft through the one-step method, alternately twine and twist with the cladding technology, the one-step method system of fancy yarn (containing core yarn, decoration yarn and solidus) has been realized, simultaneously through the linear density and the blending ratio of regulation and control decoration yarn, the twist of regulation and control core yarn, the technological means such as the switching of regulation and control core yarn and decoration yarn realize fancy yarn bamboo joint, big tripe, knot, the color of circle, braid and the online change of form, expand the new variety of fancy yarn.

The first back roller 41 is connected with the first middle roller 61 through a first transmission gear set, and the first transmission gear set is used for keeping the traction ratio (linear speed 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 speed ratio) between the second middle roller 62 and the second back roller 42 constant and not more than 1.4.

Wherein, each back roller, middle roller and preceding roller top correspond respectively to be provided with the epitheca roller, and the epitheca roller is used for grasping the yarn with the roller cooperation of below. The epithelial roller comprises: a posterior epithelial roll P4, an intermediate epithelial roll P6, and an anterior epithelial roll P7.

preferably, a middle upper leather roller P6 is arranged above the middle roller on the same one of the first channel and the second channel, the yarn forming device also comprises an upper leather ring Q1 which is sleeved on the upper leather roller P6 and an upper pin Z1 and keeps synchronous movement with the middle roller, and a lower leather ring Q2 which is sleeved on the middle roller and a lower pin Z2 and keeps synchronous movement with the middle roller; the distance between the gripping jaws of the upper leather ring Q1 and the lower leather ring Q2 and the front Rola jaw line is less than 3 mm.

the secondary draft eq is a dynamic main draft, the speed of the middle roller is changed relative to the front roller, when the blending ratio K of one component yarn in the first channel or the second channel is 0 percent, when the secondary draft ratio eq of the channel yarn is ∞, the channel yarn forms a draft singular point in the second draft zone, the distance delta between the draft singular point and the jaw of the front roller is less than or equal to 3mm (in the prior art, the gauge between the rear roller and the middle roller is generally greater than 25mm, the draft singular point position in the first draft zone is randomly distributed between the middle roller and the rear roller, when the draft singular point distance exceeds 3mm from the jaw of the middle roller, the time for the draft singular point to be fed into the jaw of the middle roller again has an uncertain factor, if the matching is not good, coarse details are generated, or the spinning ends are broken, so that the spinning becomes an unstable process, and the reliability of the spinning and the quality of the finished yarn are influenced). When K is gradually increased, the slivers held by the upper and lower leather rings are instantaneously fed into the jaw of the front roller to carry out secondary drafting along with the synchronous start of the rear roller and the middle roller, so that the drafting singular points in a secondary drafting zone can not influence the stability of spinning.

Experimental statistics prove that the end breakage rate of the yarn in the first drafting zone is zero, the probability of appearance of unstable points with thickness mutation is reduced by 71% compared with the prior art, meanwhile, the end breakage rate of the yarn in the second drafting zone is reduced by 41%, and the probability of appearance of unstable points with 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, a first rear roller 41 is fitted onto the rear roller shaft 4 in a relatively fixed manner (for example by means of a key), and a second rear roller 42 is fitted onto the rear roller shaft 4 in a relatively rotatable manner (for example by means of a bearing); in the circumferential direction of the middle roller shaft 6, the first middle roller 61 can be sleeved on the middle roller shaft 6 in a relatively rotating 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, a first front roller 71 and a second front roller 72 are sleeved on the front roller shaft 7 in a relatively rotatable manner, and a third front roller 73 is sleeved on the front roller shaft 7 in a relatively fixed manner; the feeding (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 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 rotating speeds of the first front roller 71 and the second front roller 72 (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 8 and the second front shaft 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 in meshing transmission in sequence; the first driving gear 411 is coaxially and fixedly connected with the first rear roller 41, and the first driven gear 611 is coaxially and fixedly connected with the first middle roller 61; the second transmission gear set comprises a second driving gear 621, a second intermediate gear 52 and a second driven gear 421 which are in meshing transmission in sequence; the second driving gear 621 is coaxially and fixedly connected with the second middle roller 62, and the second driven gear 421 is coaxially and fixedly connected with the second rear roller 42. Wherein, the first intermediate gear 51 and the second intermediate gear 52 are respectively looped on the intermediate shaft 5 through bearings.

The first gear transmission pair includes: a first main gear 81 and a first auxiliary gear 711 which are meshed with each other for transmission, wherein 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 manner; the second gear transmission pair comprises: a second main gear 111 and a second auxiliary gear 721 which are meshed with each other, wherein the second main gear 111 is fixedly sleeved on the second front shaft 11, and the second auxiliary gear 721 is coaxially and fixedly connected with the second front roller 72.

As shown in fig. 4, the present embodiment further includes 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 the servo driver in sequence.

The servo motor includes: the yarn fixing device comprises a first servo motor for driving a rear roller shaft 4 to rotate, a second servo motor for driving a middle roller shaft 6 to rotate, a third servo motor for driving a first front shaft 8, a fourth servo motor for driving a second front shaft 11, a fifth servo motor for driving a front roller shaft 7 to rotate and a yarn fixing servo motor for driving a lead-in roller R2 to rotate;

The rotation speed sensor includes: the yarn fixing device comprises a first sensor, a second sensor, a third sensor, a fourth sensor and a fifth sensor which are used for monitoring the rotating speeds of a rear roller shaft 4, a middle roller shaft 6, a first front shaft 8, a second front shaft 11 and a front roller shaft 7 respectively, and a yarn fixing sensor used for monitoring the rotating speed of a draw-in roller R2.

The twisting mechanism comprises a special pipe, a ring plate and a spindle; the controller controls the movement of the ring plate through the servo driver and the servo motor, and the controller is connected with the spindle through the servo driver and the servo motor; and a spindle sensor for monitoring the spindle speed.

In addition, a twist-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 twisting-resistant leather rollers rotate along the same direction with the front upper leather rollers through a twisting-resistant transmission gear group. The twisting-resistant transmission gear set (not shown) comprises a twisting-resistant driving gear, a twisting-resistant bridge gear and a twisting-resistant driven gear which are sequentially meshed for transmission; the twisting-resistant driving gear and the front upper leather roller are coaxially and fixedly connected, and the twisting-resistant driven gear and the twisting-resistant leather roller are coaxially and fixedly connected. Wherein, the transmission ratio of the twist-resistant transmission gear set is 0.741-0.909. And the drafting multiplying power between the twist-resistant leather roller and the front leather roller is 1.1-1.35, the gathering effect of the strands is improved through the micro-drafting multiplying power of the gathering area, and the straightness and orientation degree of fibers in the yarns are further improved.

when spinning, various fancy yarns are spun as follows:

1. Spinning of ring spindle fancy yarn formed by one-step twisting of decorative yarn, core yarn and solid yarn

in a twisting triangular 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 yarn strips and one path of staple fiber yarn (or filament yarn), and the untwisted yarn strips and the staple fiber yarn (or filament yarn) are alternately twisted under the action of ring twisting force to form a main body of the fancy yarn; and at the second twisting point, the output fourth path of spun yarns (or filaments) and the formed main body of the fancy yarn are coated and twisted to form the fancy yarn, so that the spinning of the decorative yarn, the core yarn and the solid yarn one-step ring spindle fancy yarn is realized.

2. Fancy yarn with on-line changing wrapping structure

The speeds of the rear roller, the middle roller and the three front rollers are regulated and controlled on line, so that the fancy yarns of the single-twist coating structure, the fancy yarns of the alternate-twist coating structure and the fancy yarns of the winding-twisting coating structure can be respectively spun by cooperatively inputting the decorative yarns and the core yarns;

Two untwisted strands or yarns are respectively led into the alternating twisting triangular area through two channels of the first channel, the second channel and the third channel, and are twisted at a non-constant speed at the first twisting point, and then are wrapped by fourth component yarns (solid yarns) at the second twisting point to form fancy yarns with an alternate twisting and wrapping structure;

firstly, spinning single-twist coated fancy yarns:

The utility model discloses in the device, first to the three channels correspond first to three front roller, because roving Y1 (be first component yarn) is exported by first front roller after first channel reversal draft, yarn X1 (be third component yarn) is exported by roller before the third through the third channel, and roving Y2 (be second component yarn) is exported by roller before the second after second channel reversal draft. At the moment, the output strand finishes single twisting at the first twisting point, and is coated by the fixed thread G1 output by the fourth channel at the second twisting point to form a single-twisting coated fancy yarn structure.

for example, the untwisted strands drafted by the first passage complete single twisting at the first twisting point, and are covered by (fourth component yarn) solid yarn G1 at the second twisting point to form fancy yarn with single-twist covered structure. In this way, three kinds of fancy yarns of single twist covered structure (Y1+ G1), (Y2+ G1), (X1+ G1) and the like can be formed. The specific parameters are set as follows:

Vh (t) ≠ 0, Vq1(t) ≠ 0, vz (t) ═ Vq2(t) ═ Vq3(t) ═ 0, then the roving Y1 is drafted into untwisted sliver through the channel a, and then the single twist is completed at the first twist point, and the roving Y1 is covered by the fixed yarn G1 at the second twist point to form the fancy yarn with the single twist covered structure;

vz (t) ≠ 0, Vq2(t) ≠ 0, vh (t) ═ Vq1(t) ═ Vq3(t) ═ 0, then the roving Y2 is drafted into untwisted sliver through the second channel, single twisting is finished at the first twisting point, and the roving Y2 is covered by the fixed yarn G1 at the second twisting point to form the fancy yarn with single twisting covering structure;

vq3(t) ≠ 0, vh (t) ═ Vq1(t) ═ vh (t) ═ Vq2(t) ═ Vq3(t) ═ 0, then core yarn X1 completes single twist at the first twist point, and is covered by fixed yarn G1 at the second twist point to form a fancy yarn with single twist covered structure;

a, spinning of fancy yarns with a twisting and coating structure:

the twisted yarn covering structure of an effect yarn is a structure of an effect yarn formed by twisting two untwisted strands (or yarns) at a constant speed at a first twisting point and covering the untwisted strands (or yarns) with a fixed yarn at a second twisting point. The utility model discloses in the device, first to the three channels correspond first to three front roller, because roving Y1 is exported by first front roller after first passageway reversal draft, yarn X1 is exported by roller before the third through the third passageway, and roving Y2 is exported by roller before the second after the second passageway reversal draft. At the moment, two strands are output by two front rollers at the same speed and are twisted at a first twisting point, and the second twisting point is covered by a fixed thread G1 output by a fourth channel to form a twisted and covered fancy yarn structure. In this way, four kinds of fancy yarns with a cross-twisting and coating structure, such as [ (Y1+ Y2) + G1], [ (Y1+ X1) + G1], [ (Y2+ X1) + G1], [ (Y1+ Y2+ X1) + G1], can be formed.

thirdly, spinning the fancy yarns with the winding and twisting coating structures:

The twisted and covered structure of the effect yarn is a structure of the effect yarn formed by twisting three or more untwisted strands (or yarns) at a first twist point at a non-constant speed and covering the untwisted strands (or yarns) with a solid yarn at a second twist point. The roving Y1 is output by the first front roller after being subjected to alternating drafting through the first channel, the yarn X1 is output by the third front roller through the third channel, and the roving Y2 is output by the second front roller after being subjected to alternating drafting through the second channel. At this time, three or more untwisted strands (or yarns) are non-uniformly delivered by three front rollers at a non-uniform speed, and are non-uniformly twisted at a first twisting point, and are covered by a fixed yarn G1 delivered from a fourth channel at a second twisting point to form a twisted and covered fancy yarn structure. In this way, a fancy yarn of (Y1+ X1+ Y2+ G1) or the like of a twist-and-turn covering structure can be formed.

3. Spinning of fancy yarn with on-line variation of shape

the speed of the rear roller, the middle roller and the three front rollers can be adjusted and controlled on line, so that the online change of the combination modes of the decoration yarns and the core yarns, the online change of the combination modes of patterns such as knots, braids and loops, the online change of the sizes of the patterns such as the knots, the braids and the loops, the online change of the colors of the patterns such as the knots, the braids and the loops and the online change of the colors of the patterns such as the knots, the braids and the loops can be realized, and the combined fancy yarns with changeable appearance forms can.

Fancy yarn spinning with decoration yarn and core yarn combined mode changing on line

the first component yarn, the second component yarn and the third component yarn are respectively led into the interactive twisting triangular area through a first front roller, a second front roller and a third front roller, wherein the component yarn (strand) with the lowest speed of the front rollers is core yarn of fancy yarn, the component yarn with the higher speed of the front rollers is decoration yarn of the fancy yarn, and online change of the combination mode of the decoration yarn and the core yarn in the fancy yarn is realized by adjusting the feeding speed of the front rollers of the first component yarn, the second component yarn and/or the third component yarn on line.

for example, after the rovings Y1, Y2 are alternately drafted through the first and second channels, the rovings Y1, Y2 are respectively output by the first and second front rollers at Vq1(t) and Vq2(t), and the yarn X1 is output by the third front roller at Vq3 (t). Generally, the strands with the lowest speed of the front roller become core yarns of the fancy yarns, and the strands with relatively higher speed become the fancy yarns of the fancy yarns. When Vq1(t) is the smallest, Y1 is the core yarn, X1 and Y3 are the face yarns; when Vq2(t) is the smallest, Y2 is the core yarn, Y1 and X1) are the face yarns; when Vq3(t) is the smallest, X1 is the core yarn and Y1 and Y2 are the face yarns. Therefore, the online change of the combination mode of the decoration yarns and the core yarns can be realized by regulating Vq1(t), Vq2(t) and Vq3(t) through the PLC.

Secondly, the fancy yarns with patterns such as knots, braids, loops and the like combined for on-line change are spun

the speeds of the first front roller, the second front roller and the third front roller are respectively Vq1, Vq2 and Vq3, the online control of Vq1, Vq2 and/or Vq3 is carried out, under the condition that the rotation speed of the rear roller and the rotation speed of the middle roller on the first channel and the second channel are not equal and are not zero (namely Vh (t) ≠ Vz (t) ≠ 0), and the controller controls the ratio of Vq1(t): Vq2(t): Vq3(t), so that the online change of various pattern combinations on the fancy yarn can be realized.

the patterns include, but are not limited to, knots, braids, loops, and the like.

Spinning of fancy yarns with patterns of knots, braids, loops and the like changed on line

the sizes of patterns such as knots, plaits, loops and the like of the fancy yarns depend on the thicknesses and twists of the decorative yarns and the core yarns and the overfeed speed of the decorative yarns relative to the core yarns. When forming knots, the fancy yarn with large decorative yarn coarse twist is larger than the fancy yarn with small decorative yarn fine twist; when the circles are formed, the fancy yarn with the large overfeed ratio of the thick twist of the decorative yarn is larger than the fancy yarn with the small overfeed ratio of the thin twist of the decorative yarn, and the circles formed by twisting are larger; when the plait is formed, the fancy yarn with the large overfeed ratio of the thick twist of the decorative yarn is longer than the fancy yarn with the small overfeed ratio of the thin twist of the decorative yarn.

the linear density of the first component yarn and/or the second component yarn is changed by online regulating and controlling the speed Vz (t) of the middle roller and the speed Vh (t) of the rear roller in the first channel and/or the second channel, and/or the online regulating and controlling the speed Vq3(t) of the third front roller, so that the online change of the pattern size on the fancy yarn can be realized.

the online change of the pattern size on the fancy yarn specifically comprises the following steps:

regulating size of yarn knot

② regulating and controlling size of fancy yarn ring

regulating and controlling length of fancy yarn plait

The overfeeding amount of the rotating speed Vq3(t) of the third front roller relative to the speed Vq1(t) of the first front roller and the speed Vq2(t) of the second front roller is regulated and controlled on line, namely the overfeeding amount of the linear speed of the decorative yarn relative to the linear speed of the core yarn is regulated and controlled on line, when the overfeeding amount is large, the braid is long, and when the overfeeding amount is small, the braid is short, so that the length of the braid of the fancy forming yarn is regulated and controlled on line;

Spinning of fancy yarns with patterns and colors changing on line, such as knots, braids, circles and the like

the pattern colors of the fancy yarn knots, braids, loops and the like depend on the change of the color mixing ratio of the fancy yarns. If colored rovings are used as the rovings Y1 and Y2 as the decorative yarns, rovings of two colors can be arbitrarily selected from seven-color rovings such as red, orange, yellow, green, cyan, blue, and violet.

the linear densities of the first component yarn and the second component yarn are respectively rho 1 and rho 2, and the blending ratios Ks1(t) and Ks2(t) of the first component yarn and the second component yarn are respectively as follows:

4. fancy yarn with online color change

the speeds of the upper back roller and the middle roller of the first channel and/or the second channel and the three front rollers are regulated and controlled by the PLC, the wrapping structure and the wrapping ratio of each component of the fancy yarn can be regulated and controlled, and the color on-line change of the fancy yarn can be regulated and controlled on line.

The fancy yarn is formed by mutually wrapping core yarn, decorative yarn and solid yarn, and when the wrapping structure and the wrapping proportion are changed on line, the color of the fancy yarn is changed on line. According to the formulas (6), (7), (8), (9) and (10), if the four yarns rho 1, rho 2, rho x and rho g fed in the two twisting processes are respectively red, yellow, blue, black and the like, the colors of the fancy yarns can be regulated and controlled by changing the coating ratio. If the coating ratio of the fancy yarn is Kh1(t), Kh2(t), Kh3(t) and Kh4(t) and the linear density of the fancy yarn is rhohy (t), the servo motor is regulated and controlled by a PLC (programmable logic controller)

vh (t), Vz (t), Vq1(t), Vq2(t), Vq3(t), VR1(t) speed drive, so that it satisfies the following formula:

V(t)＝K(t)*ρ(t)/ρ (13)

V(t)＝C*K(t)*ρ(t)/ρ (14)

V(t)＝K(t)*ρ(t)/ρ (15)

V(t)＝K(t)*ρ(t)/ρ (16)

Therefore, the speeds of the rear roller, the middle roller and the three front rollers are regulated and controlled by the PLC, the wrapping structure and the wrapping ratio of each component of the fancy yarn can be regulated and controlled, and the color on-line change of the fancy yarn can be regulated and controlled on line.

The utility model provides a pair of adopt above-mentioned four passageway reversal drafting to twine twisting cladding ring spindle fancy yarn forming device, through the ring spindle spinning system who has four ways spinning passageway and two twist points of construction, at first twist point (first twist point D1 department) by three coaxial and different rotational speed's preceding roller output respectively two way no twist yarn strip and all the way short fiber yarn (or filament) accomplish mutual twist and form fancy yarn main part in the twisting triangle area, carry out the cladding twist by the fourth way short fiber yarn (or filament) of output and fashioned fancy yarn main part at second twist point (second twist point D2 department), form the fancy yarn that contains decoration yarn, core yarn and solid yarn, realize the spinning of decoration line, heart yearn, solid one-step method ring spindle fancy yarn;

In addition, by regulating and controlling the speed change of the rear roller, the middle roller and the three front rollers, fancy yarns with multiple structures such as single-twist coating, alternate-twist coating, winding-twist coating and the like are spun; and by regulating and controlling the speed change of the rear roller, the middle roller and the three front rollers, the combination of the decoration yarns and the core yarns is changed on line, the combination of patterns such as knots, braids, loops and the like is changed on line, the sizes of the patterns such as the knots, the braids, the loops and the like are changed on line, the colors of the patterns such as the knots, the braids, the loops and the like are changed on line, and the combined fancy yarns with changeable appearance forms are spun; finally, the coating ratios of the core wire, the decoration wire and the solid wire are regulated and controlled by regulating and controlling the speed changes of the rear roller, the middle roller and the three front rollers, the colored fancy yarns with online color changes are spun, and the production efficiency is greatly improved.

example 2

the structure of the present embodiment is substantially the same as that of embodiment 1, except that:

as shown in fig. 5, the control system further includes a first comparison module and a second comparison module, the first comparison module is respectively connected to the first sensor, the second sensor and the controller, the first comparison module is configured to monitor a rotation speed ratio between the middle roller shaft and the rear roller shaft, and the controller regulates and controls a rotation speed of the middle roller shaft or the rear roller shaft according to a value fed back by the first comparison module, so as to regulate and control a blending ratio of the first component yarn and the second component yarn.

realize yarn blending ratio regulation and control for the accuracy and fast, the utility model discloses direct numerical value according to first comparison module feedback is regulated and control, even if because various error reasons lead to well roller shaft 6 and back roller shaft 4 rotational speed to surpass respectively and set for the error range, as long as guarantee that well roller shaft 6 and back roller shaft 4 rotational speed ratio (the feeding speed ratio of second component yarn and first component yarn) of first comparison module feedback are in setting for the error range, can continue to produce and need not additionally adjust the actual rotational speed of well roller shaft 6 and back roller shaft 4. Compared with the prior art, a plurality of parameters such as roller and back roller compare in need monitoring simultaneously, the utility model discloses only need monitor a parameter, widened well roller and back roller regulation and control precision, increased system control's redundancy, and highlighted the importance of roller rotational speed ratio on the different passageways, still improved the blending ratio control accuracy of yarn greatly when the work load greatly reduced that the controller handled, in addition, avoided shutting down or adjust time in the production process, the production efficiency of equipment improves more than 30%.

The second comparison module is respectively connected with the third sensor, the fourth sensor, the fifth sensor and the controller, the second comparison module 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.

furthermore, the regulation and control precision of the control system is relaxed, the redundancy of system control is increased, the importance of the rotating speed ratio of the front rollers on different channels is highlighted, the control precision of the blending ratio of the yarns is greatly improved while the workload of the controller is greatly reduced, in addition, the halt or the adjustment time in the production process is avoided, and the production efficiency of the equipment is improved.

The comparison module may be a conventional comparator, an integrated comparison circuit, or a comparison module in software in the controller cpu. The sensor may be in many forms, such as a photoelectric encoder or a hall revolution sensor.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The forming device of the four-channel alternating drafting twisting covered ring spindle fancy yarn is characterized by comprising a first channel for the first component yarn to pass through, a second channel for the second component yarn to pass through, a third channel for the third component yarn to pass through and a fourth channel for the fourth component yarn to pass through;

The regions between the rear roller, the middle roller and the front roller on the first channel and the second channel are drafting regions, and an interactive twisting triangular region is formed among the first front roller, the second front roller, the third front roller and the first twisting point;

2. the ring-spinning yarn forming device according to claim 1, wherein the first back roller and the second back roller are coaxially arranged to be rotatable relative to each other in a circumferential direction; the first middle roller and the second middle roller are coaxial and can rotate relatively in the circumferential direction; the first front roller, the second front roller and the third front roller are coaxial and can rotate relatively in the circumferential direction.

3. The ring-spinning fancy yarn forming device as claimed in claim 1, wherein 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 a traction ratio between the first middle roller and the first back roller constant and not more than 1.4;

The second back roller is connected with the second middle roller 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 back roller constant and not more than 1.4.

4. the ring-spun fancy yarn forming device as claimed in claim 3, 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 relatively and fixedly, and the second rear roller is sleeved on the rear roller shaft relatively and rotatably;

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.

5. The ring-shaped fancy yarn forming device according to claim 4, further comprising 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 rotation 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.

6. The ring-spinning yarn forming device according to claim 3, wherein the first transmission gear set comprises a first driving gear, a first intermediate gear and a first driven gear which are meshed and driven in sequence; 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;

7. The ring-spinning yarn forming apparatus of claim 5, wherein the first gear transmission pair comprises: the first main gear and the first pinion are in meshed transmission with each other, the first main gear is fixedly sleeved on the first front shaft, and the first pinion is fixedly connected with the first front roller in a coaxial manner;

8. The ring-spun fancy yarn forming device of claim 6, further comprising an intermediate shaft, wherein the first intermediate gear and the second intermediate gear are movably sleeved on the intermediate shaft.

9. the ring-shaped fancy yarn forming apparatus as claimed in claim 1, wherein outer diameters of the first front roller, the second front roller and the third front roller are the same size.