CN209836440U

CN209836440U - Three-channel alternating drafting twisting coating ring spindle fancy yarn forming device

Info

Publication number: CN209836440U
Application number: CN201920321781.2U
Authority: CN
Inventors: 薛元; 高卫东
Original assignee: Jiangnan University
Current assignee: Jiangnan University
Priority date: 2019-03-13
Filing date: 2019-03-14
Publication date: 2019-12-24
Anticipated expiration: 2029-03-14

Abstract

The utility model provides a three-channel alternating drafting twisting coating ring spindle fancy yarn forming device, which comprises a first channel, a first auxiliary channel, a second auxiliary channel and a yarn fixing channel; a first twisting point and a second twisting point are arranged on the channel; in the circumferential direction, the first front roller, the second front roller and the third front roller on the channel can be arranged in a relative rotating way; the first component yarn and the second component yarn are alternately twisted by the first twisting point to form a fancy yarn main body; and coating and twisting the main body of the fancy yarn by the fixed yarn through the second twisting point to form the fancy yarn. The utility model discloses a one-step method of fancy yarn is spun, through speed, regulation and control that decorate yarn and core yarn in coordination with the feeding twist point, the linear density and the blending ratio of regulation and control decoration yarn, the twist of regulation and control core yarn, the color of regulation and control core yarn and decoration yarn's switching etc. technical means realize fancy yarn bamboo joint, big tripe, knot, circle, pigtail and the online change of form, extend the new variety of style yarn.

Description

Three-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 three channel reversal drafting twines fancy yarn forming device of twisting with fingers 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 binary channels ring spindle spinning fancy yarn, through processes such as reversal draft-carry in coordination-mutual twining 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 three-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 first auxiliary channel for the second component yarn to pass through, and a second auxiliary channel for the third component yarn to pass through; a yarn fixing channel for fixing yarn to pass through;

the first channel is sequentially provided with a rear roller, a middle roller, a first front roller, a first twisting point and a second twisting point; the first auxiliary channel is sequentially provided with 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 second auxiliary channel; in the circumferential direction, the first front roller, the second front roller and the third front roller can be arranged in a relative rotating way; the yarn fixing channel is sequentially provided with a leading-in roller and the second twisting point;

the area among the rear roller, the middle roller and the first front roller on the first channel is a drafting area, and an interactive twisting triangular area 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 of the first component yarn, the second component yarn and the third component yarn are led to the interactive twisting triangular area and then twisted to form a fancy yarn main body; and the fixed yarns are led to the second twisting point through the leading-in roller, are intersected with the fancy yarn main body and wrap the fancy yarn main body.

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.

Further, the back roller and the 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 middle roller and the back roller constant and not more than 1.4.

The utility model provides a 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 the 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 alternation draft to first component yarn. Of particular importance is the fact that the primary draft is a pre-draft, the primary draft ratio e_hConstant C is constant draft, draft ratio e of primary draft_hC is less than or equal to 1.4, the continuity of the roving can be ensured, and the roving cannot be produced in the first drafting zoneGenerating a singular point of drafting. 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.

Further, the first auxiliary channel further comprises a first leading-out roller (a first unwinding shaft), and the first leading-out roller, the second front roller, the first twisting point and the second twisting point are sequentially arranged;

and/or the second auxiliary channel further comprises a second leading-out roller (a second unwinding shaft), and the second leading-out roller, the third front roller, the first twisting point and the second twisting point are sequentially arranged.

Preferably, an upper middle leather roller is correspondingly arranged above the middle roller, the yarn forming device further comprises an upper leather ring 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 ring 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.

Furthermore, the device also comprises a rear roller shaft, a middle roller shaft and an auxiliary shaft;

the rear roller is movably sleeved on the rear roller shaft in a relative rotation way (for example, in a bearing way) in the circumferential direction of the rear roller shaft; in the circumferential direction of the middle roller shaft, the middle roller can be movably sleeved on the middle roller shaft in a relative rotation manner; 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 rear roller in a coaxial manner, and the first driven gear is fixedly connected with the middle roller in a coaxial manner; the first intermediate gear is sleeved on the auxiliary shaft relatively and fixedly.

Therefore, the rear roller and the middle roller can be synchronously driven to run through the auxiliary shaft, and the feeding speed of the first component yarn is further adjusted.

Further, the device also comprises a front roller shaft; in the circumferential direction of the front roller shaft, the first front roller is sleeved on the front roller shaft relatively and fixedly; the second front roller and the third front roller can be sleeved on the front roller shaft in a relatively rotating manner.

Further, the roller mechanism further comprises a second front shaft and a third front shaft, wherein the second front shaft is connected with the second front roller through a second gear transmission pair; the third front shaft is connected with the third front roller through a third gear transmission pair; the second front roller and the third front roller can be driven to rotate through the second front shaft and the third front shaft respectively.

Further, the second gear transmission pair includes: the second main gear and the second auxiliary gear are in meshed transmission with each other, 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 manner;

the third gear transmission pair includes: a third main gear and a third pinion which are in meshed transmission with each other, wherein the third main gear is fixedly sleeved on the third front shaft, and the third pinion is fixedly connected with the third front roller in a coaxial manner.

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

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 front roller shaft, the second servo motor is used for driving the second front shaft, the third servo motor is used for driving the auxiliary shaft to rotate, the fourth servo motor is used for driving the first extraction roller to rotate, the fifth servo motor is used for driving the first extraction roller to rotate, the sixth servo motor is used for driving the third front shaft, the yarn fixing motor is used for driving the extraction roller to rotate, and the spindle servo motor is used for driving the spindle to rotate;

the rotation speed sensor includes: the yarn fixing device comprises a first sensor, a second sensor, a third sensor, a fourth sensor, a fifth sensor and a sixth sensor which are respectively used for monitoring the rotating speeds of the front roller shaft, the second front shaft, the auxiliary shaft, the first leading-out roller, the second leading-out roller and the third front shaft, and a yarn fixing sensor 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.

Furthermore, the twisting mechanism comprises a ring plate, and the controller controls the ring plate to move through a servo driver and a servo motor. 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 a third sensor, a fourth sensor, a fifth sensor and the controller, the first comparison module is used for monitoring the rotation speed ratio among the auxiliary shaft, the first leading-out roller and the second leading-out roller, and the controller regulates and controls the rotation speed of the auxiliary shaft, the first leading-out roller and the second leading-out roller according to a numerical value fed back by the first comparison module, so that the blending ratio of the first component yarn, the second component yarn and the third component yarn is regulated and controlled.

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 three channels reversal draft to twine twisting cladding ring spindle fancy yarn forming device has two way spinning passageways and two ring spindle spinning systems of twisting point through the construction, accomplish mutual twist and form fancy yarn main part at first twisting point (first twisting point department), carry out the cladding twist by the solid yarn of output and the fancy yarn main part that has taken shape at second twisting point (second twisting point department), form and contain the fancy yarn of decorations yarn, core yarn and solid yarn, realize the spinning of decorations, 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.

Additionally, the utility model also discloses an adopt above-mentioned three channels reversal draft to twine fancy yarn forming method of twisting cladding ring spindle fancy yarn forming device.

The utility model discloses a ring spinning device comprises the core yarn passageway of the draft passageway of roving and two way staple fiber yarn (or filament) and cladding yarn passageway all the way. The roving is subjected to alternating drafting to form untwisted strands with variable thickness, the untwisted strands are output by a drafting channel and are intersected with the yarns (or filaments) output by the other two core yarn channels at a first twisting point, and under the action of a ring spindle twisting effect, the three strands are twisted alternately to form a fancy yarn main body; due to the ring twisting effect, the solid yarn (or filament) and the formed main body of the fancy yarn are subjected to cladding twisting at a second twisting point, so that the fancy yarn comprising the decoration yarn, the core yarn and the solid yarn is formed, and the spinning of the decoration yarn, the core yarn and the solid yarn one-step ring fancy yarn is realized.

Further, by adjusting and controlling the speed of the rear roller, the middle roller and the three front rollers on line, 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 and twisting coating structure can be respectively spun by the input decorative yarns and the core yarns in a coordinated manner;

twisting an untwisted strand or yarn through the first channel, the first auxiliary channel or the second auxiliary channel at the first twisting point, and covering the untwisted strand or yarn at the second twisting point by a fixed yarn to form a 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 first auxiliary channel or the second auxiliary channel, and are twisted at a non-constant speed at the first twisting point, and then are wrapped by the fixed yarns at the second twisting point to form fancy yarns with an alternating twisting and wrapping structure;

three untwisted strands or yarns are respectively led into the interactive twisting triangular area through the first channel, the first auxiliary channel and the second auxiliary channel, and are wrapped by the fixed yarns at the second twisting point to form the fancy yarn with a twisting and wrapping structure after non-constant-speed twisting is carried out at the first twisting point.

Further, it is set that the speeds of the first front roller, the second front roller and the third front roller are respectively V_q1、V_q2And V_q3By regulating V on line_q1、V_q2And/or V_q3(ii) a 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.

Furthermore, the first component yarn, the second component yarn and the third component yarn are respectively introduced into the interactive twisting triangular area through a first front roller, a second front roller and a third front roller, the component yarn 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 speeds of the first front roller, the second front roller and the third front roller on line.

Further, the spinning step of the fancy yarn with the online change of the combination of patterns such as knots, braids, loops and the like comprises the following steps:

when V_q1(t):V_q2(t):V_q3(t) ═ 1:1 (1.15-1.3), the first component yarn (the finish yarn Y) was alternately twisted and kinked in the second component yarn and the third component yarn (the core yarn X)₁+X₂) Forming a knot thereon;

when V is_q1(t):V_q2(t):V_q3When (t) is (1.4-4) to 1:1, the first component yarn (the finish yarn Y) is alternately twisted and twisted with the second component yarn and the third component yarn (the core yarn X)₁+X₂) Forming a ring on the upper part;

when V_q1(t):V_q2(t):V_q3(t): 1.15-1.3 (1.15-1.3), the second component yarn and the third component yarn (the decorative yarn X)₁+X₂) Intertwining and twisting the first component yarn (core yarn Y) to form knuckles;

when V is_q1(t):V_q2(t):V_q3(t) 1 (1.4-4): 1.4-4), the second component yarn and the third component yarn (dressing yarn X)₁+X₂) Intertwining and twisting the first component yarn (core yarn Y) to form a braid or loop;

③ when V_q1(t): Vq2(t): Vq3 (t): 1 (1.15-1.3), the third component yarn (the decorative yarn X)₂) Alternately twisting and twisting the first component yarn and the second component yarn (core yarn (X))₁+ Y)) to form a knot;

when V is_q1(t):V_q2(t):V_q3When (t) is 1:1 (1.4-4), the third component yarn (decorative yarn X)₂) Alternately twisting and twisting the first component yarn and the second component yarn (core yarn (X))₁+ Y)) to form a braid or loop;

d 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 (decorative yarn (X)₁+ Y)) alternately twisted and twisted on the third component yarn (core yarn X)₂) Forming a knot thereon;

when V is_q1(t):V_q2(t):V_q3(t) ═ 1.4-4: (1.4-4):1, the first component yarn and the second component yarn (decorative yarn (X)₁+ Y)) alternately twisted and twisted on the third component yarn (core yarn X)₂) Forming a braid or a ring on the upper part;

v represents_q1(t):V_q2(t):V_q3(t) ═ 1.15-1.3):1 (1.15-1.3), the first component yarn and the third component yarn (decorative yarn (X)₂+ Y)) are alternately twisted and twisted on the second component yarn (core yarn X)₁) Forming a knot thereon;

when V is_q1(t):V_q2(t):V_q3When (t) ═ 1.4-4):1 (1.4-4), the first component yarn and the third component yarn (decorative yarn (X)₂+ Y)) are alternately twisted and twisted on the second component yarn (core yarn X)₁) Forming a braid or a ring;

when V_q1(t):V_q2(t):V_q3(t): 1, (1.15-1.3) when 1, the second component yarn is alternately twisted and kinked on the first component yarn and the third component yarn to form knots;

when V is_q1(t):V_q2(t):V_q3And (t) (1.4-4):1, the second component yarn is alternately twisted and kinked on the first component yarn and the third component yarn to form a braid or a loop.

Further, the spinning step of the double-circle fancy yarn comprises the following steps:

when V is_q1(t):V_q2(t):V_q3When (t) ═ 0.4-0.25):1:1, the second component yarn and the third component yarn are decorative yarns (decorative yarn X)₁、X₂) The first component yarn is a core yarn; the second component yarn and the third component yarn are low twist yarns with a twist factor lower than 320, the second component yarn is alternately twisted and twisted on the first component yarn to form a first circle, and the third component yarn is alternately twisted and twisted on the first component yarn to form a second circle, thereby forming the double-circle fancy yarn;

second component yarn and third component yarn (finishing line X)₁、X₂) The thread density and the twist are equal, and the second component yarn and the third component yarn are respectively twisted and twisted on the first component yarn to form a symmetrical double-circle fancy thread; otherwise, the second component yarn and the third component yarn are respectively twisted and twisted on the first component yarnForming an asymmetric double-loop fancy yarn;

i.e. second component yarn and third component yarn (molding X)₁、X₂) With unequal linear density and equal twist, or second component yarn and third component yarn (lace X)₁、X₂) Equal linear density, unequal twist, or second component yarn and third component yarn (finish X)₁、X₂) The yarn density is different, the twist is different, and asymmetric double-loop fancy yarns are formed on the first component yarns.

Further, the spinning step of the double-braid fancy yarn comprises the following steps:

V_q1(t):V_q2(t):V_q3when (t) ═ 0.4-0.25):1:1, the second component yarn and the third component yarn are decorative yarns (decorative yarn X)₁、X₂) The first component yarn (core yarn Y) is core yarn; the second component yarn and the third component yarn are strong twist yarns with the twist factor higher than 480, the second component yarn is alternately twisted and twisted on the first component yarn to form a first braid, and the third component yarn is alternately twisted and twisted on the first component yarn to form a second braid, so that the double-braid fancy yarn is formed;

the second component yarn and the third component yarn have equal density and twist, so that a symmetrical double-braid fancy yarn is formed; and the second component yarn and the third component yarn have unequal densities or twists, so that the asymmetric double-braid fancy yarn is formed.

If the decorative line X₁、X₂If the thread density and the twist are equal, forming a symmetrical double-braid fancy thread; if the decorative line X₁、X₂Unequal thread density, equal twist, or a decorative thread X₁、X₂Equal thread density, unequal twist, or a decorative thread X₁、X₂Asymmetric double-braid fancy yarns can be formed due to different linear densities and different twists.

Further, the spinning steps of the fancy yarn with patterns of knots, braids, loops and the like which change on line comprise:

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 braid is formed, the twisted braid formed by the fancy yarn with the large overfeed ratio of the coarse twist of the decorative yarn is longer than the twisted braid formed by the fancy yarn with the small overfeed ratio of the fine twist of the decorative yarn;

regulating size of yarn knot

When V is_q1(t):V_q2(t):V_q3When the ratio of (t) to (1.15-1.3) is 1:1, the first component yarn is a decorative yarn, and the second component yarn and the third component yarn are core yarns; first component yarn (decorative yarn Y)₁) Alternately twisting and twisting the second component yarn and the third component yarn as a core yarn (X)₁+X₂) Forming knots thereon; the linear density of the decorative yarn is as follows:

the speed V of the back roller is regulated and controlled by a PLC_h(t), the change of the linear density of the decorative yarn can be regulated and controlled, the linear density of the decorative yarn is increased when the feeding speed of the back roller is increased, and the linear density of the decorative yarn is reduced when the feeding speed of the back roller is reduced. Thereby regulating and controlling the size of the formed fancy yarn knots to change on line;

② regulating and controlling size of fancy yarn ring

When V is_q1(t):V_q2(t):V_q3(t) ═ 1:1, (1.3-4) the first component yarn is a decorative yarn, and the second component yarn and the third component yarn are core yarns; first component yarn (decorative yarn Y)₁) Alternately twisting and twisting the second component yarn and the third component yarn as a core yarn (X)₁+X₂) Forming a loop thereon; the linear density of the decorative yarn is as follows:

by regulating the speed V of the rear roller_h(t) the variation of the thread density of the finishing yarn can be controlled, and the thread density of the finishing yarn is increased when the feeding speed of the back roller is increasedThe linear density of the decoration yarns is reduced when the feeding speed of the back roller is reduced;

meanwhile, the speed difference of the first front roller relative to the second front roller and the third front roller is regulated and controlled, and further the linear speed V of the decoration yarn is regulated and controlled_q1(t) relative core yarn V_q2(t)＝V_q3(t) overfeeding amount of linear velocity, under the condition of loop formation, if the decorative yarn is thick and the overfeeding amount is large, the loop is large, the decorative yarn is thin and the overfeeding amount is small, the loop is small, and therefore the size of the formed fancy yarn loop is regulated and controlled to change on line;

regulating and controlling thickness of fancy yarn plait

When V is_q1(t):V_q2(t):V_q3(t) 1 (1.3-4) when (1.3-4), the first component yarn is a core yarn, and the second component yarn and the third component yarn are decorative yarns; the second component yarn and the third component yarn are strong twist yarns (the twist coefficient is not less than 480), and the second component yarn and the third component yarn are immediately twisted on the first component yarn under the action of self twisting stress to form a braid;

the linear density of the second component yarn and the third component yarn as the decorative yarn is rho_x1、ρ_x2At the moment, the linear velocity V of the second component yarn and the third component yarn is regulated and controlled_q1(t)＝V_q2(t) speed V of yarn relative to first component_q3(t), 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 formed fancy yarn braid can be regulated and controlled to change on line.

Further, the spinning step of the fancy yarn with the coating ratio changing with the linear density in line comprises the following steps:

the first component yarn, the second component yarn, the third component yarn and the solid yarn are yarns with different colors, and the online change of the colors of the fancy yarns is realized by online adjusting the wrapping structure, the wrapping ratio and/or the linear density of the fancy yarns.

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. If four slivers are fed in two twisting processes rho according to equations (6) (7) (8) (9) (10)_s1、ρ_x1、ρ_x2、ρ_gRespectively red, yellow and blueAnd black, the colors of the fancy yarn can be adjusted and controlled by changing the cladding ratio. Let the linear density of the fancy yarn be rho_hy(t) the covering ratio of the effect yarn is K_h1(t)、K_h2(t)、K_h3(t)、K_h4(t) of (d). Then

Then the servo motor is regulated and controlled by the PLC and drives the V_h(t)、V_q1(t)、V_q2(t)、V_q3(t)、V_x1(t)、V_x2(t), the online variation of the density and the coating ratio of the fancy yarn can be regulated and controlled.

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

Let the linear density of the first component yarn (roving) as the decoration yarn, the density of the second component yarn (core yarn 1) and the density of the third component yarn and the linear density of the solid yarn be rho_s1、ρ_x1、ρ_x2、ρ_gAfter alternating drafting, alternate twisting and yarn-fixing covering, the linear density of the fancy yarn is rho_hySetting the speeds of the three front rollers, the rear roller and the middle roller in the spinning process and the core wire delivery speeds of the first extraction roller and the second extraction roller as V respectively_q1(t)、V_q2(t)、V_q3(t)、V_h(t)、V_z(t)、V_x1(t)、V_x2(t), C is 1.25, which is the speed ratio of the middle and rear rollers in each channel. 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. linear density of decorative yarn

2. Linear density of core yarn:

3. linear density of the solid yarn:

ρ_g(t)＝ρ_g (3)

4. linear density and coating ratio of fancy yarn

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 ring-spinning fancy yarn forming apparatus according to embodiment 3 of the present invention.

Reference numerals:

y-a first component yarn; x₁-a second component yarn; x₃-a third component yarn; g₁-fixing the yarns; r₁-a first draw-off roller; r₂-a second draw-off roller; r₃-a draw-in roller; d₁-a first twist point; d₂-a second twist point; 41-a back roller; 51-a first carrier gear; 61-middle roller; 71-a first front roller; 72-a second front roller; 73-a third front roller; 4-rear roller shaft; 5-an auxiliary shaft; 6-medium roller shaft; 7-front roller shaft; 8-a second front axle; 11-a third front axle; 411 — a first drive gear; 611 — a first driven gear; 82-a second main gear; 721-a second counter gear; 113-a third main gear; 731-third pinion; p₄-a posterior epithelial roll; p₆-an upper leather-in-roller; p₇-a pre-epithelial roller; q₁-an epithelial ring; q₂-a lower apron.

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 FIGS. 1 to 3, the three-channel alternate drafting and twisting covered ring spindle fancy yarn forming device provided by the embodiment comprises a first channel ABC for passing a first component yarn Y₁D₁D₂E. For second component yarn X₁First auxiliary passage R through₁C₂D₁D₂E and for fixing G₁Through yarn fixing passage R₃D₂E, for third component yarn X₂Second auxiliary passage R through₂C₃D₁D₂E; the first channel is sequentially provided with a back roller 41, a middle roller 61, a first front roller 71 and a first twisting point D₁And a second twist point D₂(ii) a The first auxiliary channel is sequentially provided with a second front roller 72 and a first twisting point D₁And a second twist point D₂(ii) a The yarn fixing channel is sequentially provided with a leading-in roller R₃And a second twist point D₂. A third front roller 73 and a first twisting point D are sequentially arranged on the second auxiliary channel₁And a second twist point D₂. The third front roller 73 and the second front roller 72 are rotatably provided relative to each other in the circumferential direction.

The area among the rear roller 41, the middle roller 61 and the first front roller 71 on the first channel is a drafting area, and an alternate winding and twisting triangular area is formed among the first front roller 71, the second front roller 72, the third front roller 73 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; the first component yarn and the second component yarn are led to the alternate twisting triangular area and then twisted to form the fancy yarn main body. The solid yarn passes through a draw-in roller R₃Leading to the second twisting point, intersecting with the fancy yarn main body and coating the fancy yarn main body.

The back roller 41 and the 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 middle roller 61 and the back roller 41 constant and not more than 1.4.

The utility model provides a form one-level draft unit between well roller 61 and the back roller 41, preceding roller constitutes the second grade draft unit with well roller 61, and the well 41 velocity ratio of back roller 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 41 of different passageways roller variable speed in turn before relatively, realize the alternation draft to first component yarn. Of particular importance is the fact that the primary draft is a pre-draft, the primary draft ratio e_hConstant C is constant draft, draft ratio e of primary draft_hC is less than or equal to 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.

The first auxiliary channel also comprises a first extraction roller R₁(first unwinding shaft), the first drawing roller, the second front roller 72, the first twisting point and the second twisting point are arranged in sequence; the second auxiliary channel also comprises a second extraction roller R₂(second unwinding shaft), second draw-off roller, third front roller 73, first twist point and second twist point are arranged in this order.

The back roller, the middle roller and the front roller are respectively provided with a back upper leather roller P₄Middle and upper leather roller P₆And a front upper leather roller P₇. An upper middle leather roller P is correspondingly arranged above the middle roller 61₆The yarn forming device also comprises a middle roller sleeved on the middle upper leather roller and the upper pinUpper apron Q with pull 61 maintaining synchronous movement₁A lower leather ring Q sleeved on the middle roller 61 and the lower pin and keeping synchronous movement with the middle roller 61₂(ii) a 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.

Two stage draft e_qFor dynamic main drafting, the speed of the middle roller 61 is changed relative to the front roller, when the blending ratio K of the first component yarn in the first passage is 0%, the secondary drafting ratio e of the yarn in the passage is_qWhen the yarn is matched well, coarse details or broken ends of the spun yarn are generated, so that the spun yarn becomes an unstable process, and the reliability and the quality of the spun 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 41 and the middle roller 61, so that the drafting singular points in the secondary drafting zone can not influence the stability of spinning.

The present embodiment further comprises a rear roller shaft 4, a middle roller shaft 6, a front roller shaft 7 and an auxiliary shaft 5; in the circumferential direction of the rear roller shaft 4, the rear roller 41 is movably sleeved on the rear roller shaft 4 (for example, by means of a bearing) in a relatively rotatable manner; in the circumferential direction of the middle roller shaft 6, the middle roller 61 can be movably sleeved on the middle roller shaft 6 in a relative rotation way; the first transmission gear set comprises a first driving gear 411, a first intermediate gear 51 and a first driven gear 611 which are in meshing transmission in sequence; the first driving gear is fixedly connected with the rear roller 41 in the same axle center, and the first driven gear is fixedly connected with the middle roller 61 in the same axle center; the first intermediate gear 51 is fitted relatively fixedly on the auxiliary shaft 5. Thus, the rear roller 41 and the middle roller 61 can be synchronously driven to run through the auxiliary shaft 5, and the feeding speed of the first component yarn can be adjusted.

In the circumferential direction of the front roller shaft 7, the first front roller 71 is relatively fixedly sleeved on the front roller shaft 7; the second front roller 72 and the third front roller 73 are rotatably fitted around the front roller shaft 7.

The front roller mechanism further comprises a second front shaft 8 and a third front shaft 11, wherein the second front shaft 8 is connected with the second front roller 72 through a second gear transmission pair; the third front shaft 11 is connected with the third front roller 73 through a third gear transmission pair; the second front roller and the third front roller can be driven to rotate through the second front shaft and the third front shaft respectively.

The second gear transmission pair comprises: a second main gear 82 and a second auxiliary gear 721 which are in meshing transmission with each other, wherein the second main gear is fixedly sleeved on the second front shaft 8, and the second auxiliary gear is fixedly connected with the second front roller 72 in a coaxial manner; the third gear transmission pair comprises: a third main gear 113 and a third pinion 731 which are meshed with each other for transmission, the third main gear is fixedly sleeved on the third front shaft 11, and the third pinion 731 is coaxially and fixedly connected with the third front roller 73.

Referring to 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 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. The twisting mechanism comprises a ring plate, and the controller controls the ring plate to move through a servo driver and a servo motor. In addition, the control system also includes a series of instructions and modular programs.

The utility model provides a pair of adopt above-mentioned three channel reversal drafting to twine fancy yarn forming device of twisting cladding ring spindle has two tunnel spinning passageways and two ring spinning systems of twisting point through the construction, accomplish mutual twist and form fancy yarn main part at first twist point, carry out the cladding twist by the solid yarn of output and the fancy yarn main part that has taken shape at second twist point, form the fancy yarn that contains decorations yarn, core yarn and solid yarn, realize the spinning of decorations, heart yearn, solid one-step method ring spindle fancy yarn.

Example 2

The embodiment also discloses a fancy yarn forming method adopting the three-channel alternating drafting and twisting coating ring spindle fancy yarn forming device.

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

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;

Firstly, spinning fancy yarns with a cross-twisting wrapping 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 passageway (main entrance), first auxiliary passage and second auxiliary passage correspond roller before first roller, second and the roller before third respectively, because roving Y₁The yarn X is output by a first front roller after being alternately drafted by the main channel₁The yarn X is delivered from the second front roller through the first auxiliary channel₂Is delivered out of the third front roller through the second auxiliary channel. Roving Y₁The output strands under the condition of alternating drafting are intermittent, when the linear density of the strands output by the main channel is zero, the two front rollers corresponding to the two auxiliary channels output two strands at a constant speed to be twisted at a first twisting point, and the fixed threads G output by the yarn fixing channel at a second twisting point₁The coating forms a twisted and coated fancy yarn structure. For example, [ (X) can be formed in this way₁+X₂)+G₁]The fancy yarn of the twisted covering structure.

Secondly, the fancy yarn with the winding and twisting coating structure is spun:

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 utility model discloses in the device, roller and third front roller before first passageway and first auxiliary passage, second auxiliary passage correspond first front roller, second, because roving Y is exported by first front roller after main entrance reversal draft, yarn X₁、X₂The yarn is output at constant speed through a second front roller and a third front roller corresponding to the first auxiliary channel and the second auxiliary channel, and two yarns (or filaments) (X) are output at a first twisting point₁+X₂) And the yarn is twisted with a non-twist strand (roving Y) at a non-constant speed to form a twisting structure, and the twisting structure is coated by a fixed yarn G output by a yarn fixing channel at a second twisting point to form a twisting and coating fancy yarn structure. According to the way, can formTo [ Y ]₁+(X₁+X₂)+G₁]The fancy yarn of the twist-and-wrap structure of (1).

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

The speeds of the first front roller, the second front roller and the third front roller are respectively set to be V_q1、V_q2And V_q3By regulating V on line_q1、V_q2And/or V_q3(ii) a 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 introduced 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 is realized by adjusting the speeds of the first front roller, the second front roller and the third front roller on line.

Wherein, the first component yarn (roving Y) passes through the first channel for alternating drafting and then passes through the first front roller with V_q1(t) outputting, second component yarn and third component yarn (yarn X)₁、X₂) From the second front roller and the third front roller by V_q2(t)＝V_q3(t) speed output.

Generally, the strands with the lowest speed become core yarns of the effect yarns, and the strands with relatively higher speed become decoration yarns of the effect yarns. When V is_q1(t) minimum, X₁、X₂Is core yarn, Y is decorative yarn; when V is_q2(t) minimum, X₁As core yarn, Y, X₂Is a decorative yarn. Thus, V is regulated by PLC_q1(t)、V_q2(t)、V_q3(t) may beSo as to realize the on-line change of the combination mode of the decoration yarn and the core yarn.

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

③ when V_q1(t):V_q2(t):V_q3When (t) is 1:1 (1.15-1.3), the third component yarn (decorative yarn X)₂) Alternately twisting and twisting the first component yarn and the second component yarn (core yarn (X))₁+ Y)) to form a knot;

Spinning of three-circle fancy yarn

second component yarn and third component yarn (finishing line X)₁、X₂) The thread density and the twist are equal, and the second component yarn and the third component yarn are respectively twisted and twisted on the first component yarn to form a symmetrical double-circle fancy thread; otherwise, respectively twisting and twisting the second component yarn and the third component yarn on the first component yarn to form an asymmetric double-circle fancy yarn;

Spinning of double-braid fancy yarn

If the decorative line X₁、X₂If the thread density and the twist are equal, forming a symmetrical double-braid fancy thread; if the decorative line X₁、X₂Unequal thread density, equal twist, or a decorative thread X₁、X₂Equal thread density, unequal twist, or a decorative thread X₁、X₂Asymmetric double-braid fancy yarns can be formed when the linear density and the twist are different;

weaving of fancy yarns with patterns of sizes changed on line such as knots, braids, loops and the like

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.

Regulating size of yarn knot

② regulating and controlling size of fancy yarn ring

the speed V of the back roller is regulated and controlled by a PLC_h(t), the change of the linear density of the decorative yarn can be regulated and controlled, the linear density of the decorative yarn is increased when the feeding speed of the back roller is increased, and the linear density of the decorative yarn is reduced when the feeding speed of the back roller is reduced;

regulating and controlling thickness of fancy yarn plait

3. Spinning of fancy yarn with online change of coating ratio and linear density

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. If four slivers are fed in two twisting processes rho according to equations (6) (7) (8) (9) (10)_s1、ρ_x1、ρ_x2、ρ_gThe colors of red, yellow, blue, black and the like are respectively adopted, and the colors of the fancy yarn can be adjusted and controlled by changing the cladding ratio. Let the linear density of the fancy yarn be rho_hy(t) the covering ratio of the effect yarn is K_h1(t)、K_h2(t)、K_h3(t)、K_h4(t) of (d). Then

Example 3

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, the first comparison module is respectively connected to the third sensor, the fourth sensor, the fifth sensor and the controller, the first comparison module is used for monitoring a rotation speed ratio among the auxiliary shaft, the first drawing roller and the second drawing roller, and the controller regulates and controls the rotation speeds of the auxiliary shaft, the first drawing roller and the second drawing roller 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, the second component yarn and the third component yarn.

Realize yarn blending ratio regulation and control for the accuracy fast, the utility model discloses direct numerical value according to first comparison module feedback is regulated and control, even lead to auxiliary shaft, first draw roller and second to draw the roller rotational speed and surpass respectively and set for error range because of various error reasons, as long as guarantee that the rotational speed ratio of first comparison module feedback is in setting for error range, can continue production and need not additionally adjust the actual rotational speed of well roller axle 6 and back roller axle 4. Compared with the prior art, need monitor a plurality of parameters simultaneously and compare, the utility model discloses only need monitor a parameter, relaxed the auxiliary shaft, first draw forth roller and second and draw forth the regulation and control precision of roller rotational speed, increased system control's redundancy, and outstanding the importance of roller rotational speed ratio on the different passageways, still improved the blending ratio control precision of yarn greatly when the work load greatly reduced that the controller handled, in addition, the shut down or the adjust time in having avoided 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 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 three-channel alternating drafting, twisting and wrapping ring spindle fancy yarn forming device is characterized by comprising a first channel, a first auxiliary channel and a second auxiliary channel, wherein the first channel is used for a first component yarn to pass through, the first auxiliary channel is used for a second component yarn to pass through, and the second auxiliary channel is used for a third component yarn to pass through; a yarn fixing channel for fixing yarn to pass through;

2. The ring-spinning yarn forming device according to claim 1, wherein the rear roller and the middle roller are connected by a first transmission gear set, and the first transmission gear set is used for keeping a constant traction ratio between the middle roller and the rear roller and is not more than 1.4.

3. The ring-shaped fancy yarn forming device according to claim 1, wherein the first auxiliary channel further comprises a first draw-out roller, and the first draw-out roller, the second front roller, the first twisting point and the second twisting point are sequentially arranged;

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

4. The ring-spinning fancy yarn forming device as claimed in claim 1, wherein an upper leather roller is correspondingly arranged above the middle roller, the yarn forming device further comprises an upper leather collar which is sleeved on the upper leather roller and the upper pin and keeps synchronous movement with the middle roller, and a lower leather collar which is sleeved on the middle roller and the lower pin and keeps synchronous movement 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.

5. The ring-spun fancy yarn forming device as claimed in claim 2, further comprising a rear roller shaft, a middle roller shaft and an auxiliary shaft;

in the circumferential direction of the rear roller shaft, the rear roller can be movably sleeved on the rear roller shaft in a relative rotation manner; in the circumferential direction of the middle roller shaft, the middle roller can be movably sleeved on the middle roller shaft in a relative rotation manner; 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 rear roller in a coaxial manner, and the first driven gear is fixedly connected with the middle roller in a coaxial manner; the first intermediate gear is sleeved on the auxiliary shaft relatively and fixedly.

6. The ring-spun fancy yarn forming apparatus as claimed in claim 1, further comprising a front roller shaft; in the circumferential direction of the front roller shaft, the first front roller is sleeved on the front roller shaft relatively and fixedly; the second front roller and the third front roller can be sleeved on the front roller shaft in a relatively rotating manner.

7. The ring-spinning yarn forming device of claim 6, further comprising a second front shaft and a third front shaft, wherein the second front shaft is connected with the second front roller through a second gear pair; the third front shaft is connected with the third front roller through a third gear transmission pair; the second front roller and the third front roller can be driven to rotate through the second front shaft and the third front shaft respectively.

8. The ring-spinning yarn forming device of claim 7, wherein the second gear transmission pair comprises: the second main gear and the second auxiliary gear are in meshed transmission with each other, 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 manner;