CN209836439U

CN209836439U - Four-channel hollow spindle fancy yarn forming device

Info

Publication number: CN209836439U
Application number: CN201920321595.9U
Authority: CN
Inventors: 薛元; 卜华香; 徐华民; 吕明明
Original assignee: Wuxi City And Exhibition Machinery Technology Co Ltd; Jiangnan University
Current assignee: Wuxi City And Exhibition Machinery Technology Co Ltd; 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 four-channel hollow 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 to fourth component yarns form a fancy yarn main body after being alternately twisted by a first twisting point; and a hollow spindle is arranged at the second twisting point, and the fifth component yarn on the hollow spindle is intersected with the fancy yarn main body and wraps the fancy yarn main body. The utility model discloses an alternating draft, mutual twisting and cladding technology are implemented to the one-step method, have realized the one-step method spinning of fancy yarn, through the speed of regulation and control decoration yarn and core yarn collaborative 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 realizes fancy yarn slub, big tripe, knot, circle, pigtail and the online change of form, expands out the new variety of fancy yarn.

Description

Four-channel hollow 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 hollow spindle fancy yarn forming device of four-channel.

Background

The hollow spindle spinning machine usually adopts a two-step method for producing fancy yarns, and in the first step, core yarns, decorative yarns and solid yarns are respectively spun; and secondly, false twisting the core yarn and the decoration yarn fed at different speeds by using a hollow spindle device, twisting the decoration yarn on the core yarn to form patterns such as knots, loops, braids and the like by overfeeding the core yarn through the decoration yarn, and then binding and fixing the formed patterns by using the fixing yarn unwound from the hollow spindle to form the hollow spindle pattern type yarn. The main problems of the hollow spindle spinning machine for producing fancy yarn are as follows:

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

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

3) when the hollow spindle is used for spinning the three-thread fancy yarn comprising the (core yarn, the decoration yarn and the solid yarn), only simple combination of one decoration yarn and one core yarn can be realized, and a multiple combination mode of a plurality of decoration yarns and a plurality of core yarns can not be realized, so that the online regulation and control of the combination mode of the decoration yarns and the core yarns can not be realized.

4) When the fancy yarn is spun by the hollow spindle, the change of the cladding ratio of the core yarn, the decoration yarn and the solid yarn can not be regulated and controlled: when a three-thread fancy yarn containing (core yarn, decorative yarn and solid yarn) is spun by a hollow spindle, a regulating means is lacked in the process of twisting the core yarn and the decorative yarn and then coating the core yarn and the decorative yarn by the solid yarn, so that the change of the coating ratio of the core yarn, the decorative yarn and the solid yarn cannot be regulated and controlled on line.

5) Low efficiency, high production cost and the like.

Because the hollow spindle spinning machine has the problems, 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 exquisite colors and agile style cannot be met.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a four-channel hollow spindle fancy yarn forming device, through processes such as reversal draft-carry in coordination-alternately twine and cladding, will decorate yarn, core yarn and solid yarn combination to contain the complicated 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 hollow 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 back roller, a third middle roller, a third front roller, the first twisting point and the second twisting point are sequentially arranged on the third channel;

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

the regions among the rear rollers, the middle rollers and the front rollers on the first channel, the second channel and the third channel are drafting regions, the first front roller, the second front roller, the third front roller and the first twisting point form an interactive twisting triangular region, the first front roller, the second front roller and the third front roller respectively and independently move, and corresponding component yarns are respectively introduced into the interactive twisting triangular region;

one or more yarns of the first component yarn, the second component yarn, the third component yarn and/or the fourth component yarn are subjected to alternate twisting at a first twisting point to form a fancy yarn main body;

and a hollow spindle is arranged at the second twisting point, the fancy yarn main body penetrates through the hollow spindle, the hollow spindle rotates rapidly, and a fifth component yarn on the hollow spindle is intersected with the fancy yarn main body and wraps the fancy yarn main body.

The yarn winding machine further comprises a filament bobbin, the filament bobbin is sleeved on the hollow spindle and rotates along with the hollow spindle synchronously, and the fifth component yarn is wound on the filament bobbin.

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

The utility model discloses break through the technical bottleneck of hollow spindle 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 and 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 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 third back roller is connected with the third middle roller through a third transmission gear set, and the third transmission gear set is used for keeping the traction ratio (linear velocity ratio) between the third middle roller and the third back roller constant and not more than 1.4.

In the first channel, the second channel and the third channel of the utility model, a first-level drafting unit (namely, a first drafting zone or a rear zone) is formed between the middle roller and the rear roller, and the front roller and the middle roller form a second-level drafting unit (namely, a second drafting zone or a front zone); the speed ratio of the middle roller and the rear roller of the same channel is constant and less than 1.4, the speed of the middle roller and the rear roller of the same channel is synchronously changed relative to the front roller in the channel, and the speed of the middle roller and the rear roller of different channels is alternately changed relative to the front roller, so that the alternating drafting of three groups of rough yarns is realized. 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_h＝C≤1.4, the continuity of the roving can be ensured, and no drafting singularity 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.

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.

Preferably, on the same channel among the first channel, the second channel and the third channel, 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.

Two stage draft e_qThe speed of the middle roller is changed relative to the front roller for dynamic main drafting, and when the blending ratio K of one component yarn in the first channel, the second channel or the third channel is 0%, the secondary drafting ratio e of the channel yarn_qWhen the distance delta between the channel yarn and the jaw of the front roller is not more than 3mm, the channel yarn forms a drafting singular point in the second drafting zone, the distance delta between the drafting singular point and the jaw of the front roller is not more than 3mm (in the prior art, the spacing between the back roller and the middle roller is generally more than 25mm, the drafting singular point position of the first drafting zone is randomly distributed between the middle roller and the back roller, when the drafting singular point distance exceeds 3mm from the jaw of the middle roller, the time for the drafting 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 spinning reliability and the yarn quality 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 fourth channel further comprises a leading-out roller, and the leading-out roller, the second front roller, the first twisting point and the second twisting point are sequentially arranged.

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

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

in the circumference of the middle roller shaft, the first middle roller and the third 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.

Thereby, the feeding (feeding) speeds of the first component yarn and the second component yarn can be controlled by the rear roller shaft and the middle roller shaft respectively.

Further, the device also comprises a front roller shaft; in the circumference of preceding roller axle, roller and the suit of roller before the third can rotate relatively in the preceding roller axle is last, roller fixedly suit relatively before the second is in on the preceding roller axle.

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, a leather ring for belt transmission is arranged on the back roller or the middle roller on each channel, and the leather ring is connected with a servo motor through a belt transmission mechanism; or the back roller or the middle roller on each channel is respectively and independently provided with a transmission gear structure and then is 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 manner, and the second driven gear is fixedly connected with the second rear roller in a coaxial manner;

the third transmission gear set comprises a third driving gear, a third intermediate gear and a third driven gear which are sequentially in meshing transmission; the third driving gear is fixedly connected with the third middle roller in a coaxial mode, and the third driven gear is fixedly connected with the third rear roller in a coaxial mode.

Further, still include the auxiliary shaft, in circumference, third gap bridge gear suit relatively fixedly is in on the auxiliary shaft, first gap bridge gear and second gap bridge gear loop are in on the auxiliary shaft, but through the rotational speed of auxiliary shaft synchronization adjustment third back roller and third middle roller.

Further, still include first front axle and third front axle, first front axle through first gear drive vice with first front roller is connected, the third front axle through third gear drive vice with the roller is connected before the third, through the rotational speed of roller and roller before the third can be regulated and control respectively to first front axle and third front axle.

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 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.

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 spindle motor is used for driving the hollow spindle to rotate;

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

The utility model provides a controller loops through the feeding speed of five component yarns of servo driver and servo motor control, and the actual feeding speed of five 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 five yarn control signal of monitoring value adjustment.

Further, the twisting mechanism comprises a ring rail; and the controller controls the ring plate to move through the servo driver and the 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 the first sensor, the second sensor, the third sensor and the controller, the first comparison module is used for monitoring the rotating speed ratio among the middle roller shaft, the rear roller shaft and the auxiliary shaft, and the controller regulates and controls the rotating speed of the middle roller shaft, the rear roller shaft and/or the auxiliary shaft 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.

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, back roller axle or auxiliary shaft rotational speed to surpass respectively and set for the error range, as long as guarantee the back roller axle of first comparison module feedback, well roller axle and auxiliary shaft three's rotational speed ratio (be first component yarn promptly, the feeding speed ratio of second component yarn and third component yarn) in setting for the error range, can continue to produce and need not additionally adjust the actual rotational speed of back roller axle, well roller axle or auxiliary shaft. Compare prior art, a plurality of parameters such as well roller and back roller in the different passageways of needs simultaneous monitoring are compared, 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 an adopt hollow spindle fancy yarn forming device of above-mentioned four-channel, through the hollow spindle spinning system who founds to have four ways spinning channel and two twist points, at first twist point three ways untwisted yarn strip and the short fiber yarn (or filament) of the same way are exported respectively to the front roller of three coaxial and different rotational speeds and are accomplished alternately to twist and form fancy yarn main part in the twisting triangular space, carry out the cladding twist by the fifth way short fiber yarn (or filament) of output and already shaped fancy yarn main part at second twist point, form the fancy yarn that contains decorations yarn, core yarn and solid yarn, realize the spinning of the hollow spindle fancy yarn of one-step method;

in addition, by regulating and controlling the speed of the rear roller, the middle roller, the auxiliary shaft and the three front rollers to cooperatively change, the fancy yarn with multiple structures such as single-twist coating, alternate-twist coating, winding-twist coating and the like is spun; and through regulating and controlling the speed of the back roller, the middle roller, the auxiliary shaft 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, loops and the like is changed online, the sizes of the patterns such as the knots, the braids, the loops and the like are changed online, the colors of the patterns such as the knots, the braids, the loops and the like are changed online, and the combined fancy yarn with changeable appearance and shape 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, the auxiliary shaft 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 a fancy yarn forming method of adopting above-mentioned four-channel hollow spindle fancy yarn forming device.

Further, by regulating the speeds of the rear roller and the middle roller on the first channel, the second channel and/or the third channel and the three front rollers, the fancy yarns with the single-twist coating structure, the fancy yarns with the cross-twist coating structure and the fancy yarns with the winding and twisting coating structure can be respectively spun by cooperatively inputting the decorative yarns and the core yarns;

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

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

three or four untwisted strands or yarns are respectively led into the interactive twisting triangular area through three or four channels of the first channel, the second channel, the third channel and the fourth channel, and are wrapped by fifth component yarns (solid yarns) at a second twisting point to form fancy yarns with twisting and wrapping structures after non-constant twisting is carried out at the first twisting point.

Further, the speeds of the rear roller, the middle roller and the three front rollers are regulated 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 pattern combination modes, the online change of the pattern size and the online change of the pattern color can be realized, and the combined fancy yarns with changeable appearance forms can be spun.

Further, 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, and the fourth component yarn is respectively introduced into the interactive twisting triangular area through the second front roller; the component yarn (strand) with the lowest speed of the front rollers is the core yarn of the fancy yarn, the component yarn with the higher speed of the front rollers is the 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 online adjusting the feeding speeds of the three front rollers.

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_q3Under the condition of keeping the rotation speed of the back roller and the rotation speed of the middle roller on the first channel, the second channel and the third channel unequal and non-zero (namely V)_h(t)≠V_z(t) ≠ 0), and V is regulated and controlled by a controller_q1(t)∶V_q2(t)∶V_q3The ratio of (t) can realize the on-line change of various pattern combinations on the fancy yarn;

when V_q1(t)∶V_q2(t)∶V_q3When (t) is (1.15-1.3): 1, the first component yarn, the second component yarn and the fourth component yarn (the decoration yarn Y)₁+Y₂+X₁) Alternating twisting and twistingTied to the third component yarn (core yarn Y)₃) Forming a knot thereon;

when V_q1(t)∶V_q2(t)∶V_q3When (t) is (1.3-4) to 1, the first component yarn, the second component yarn and the fourth component yarn (the decorative yarn Y)₁+Y₂+X₁) Intertwining and twisting the third component yarn (core yarn Y)₃) Forming a ring on the upper part;

③ when V_q1(t)∶V_q2(t)∶V_q3When t is 1: 1.15-1.3, the third component yarn (decorative yarn Y)₃) Alternately twisted and twisted on the first component yarn, the second component yarn and the fourth component yarn (core yarn Y)₁+Y₂+X₁) Forming a knot thereon;

d when V_q1(t)∶V_q2(t)∶V_q3When t is 1: 1.3-4, the third component yarn (decorative yarn Y)₃) Alternately twisted and twisted on the first component yarn, the second component yarn and the fourth component yarn (core yarn Y)₁+Y₂+X₁) Forming a braid or a loop.

V represents_q1(t)∶V_q2(t)∶V_q3When (t) is (1.15-1.3) to 1 (1.15-1.3), the first component yarn and the third component yarn (the decorative yarn Y)₁+Y₃) Alternately twisted and twisted on the second component yarn and the fourth component yarn (core yarn Y)₂+X₁) Forming a knot thereon;

when V_q1(t)∶V_q2(t)∶V_q3When (t) is (1.3-4) to 1 to (1.3-4), the first component yarn and the third component yarn (the decorative yarn Y)₁+Y₃) Alternately twisted and twisted on the second component yarn and the fourth component yarn (core yarn Y)₂+X₁) And forming a ring.

Further, the speed V of the middle roller in the first channel, the second channel and/or the third channel is regulated and controlled on line_z(t) and speed V of the back roller_h(t) further changing the linear density of the first component yarn, the second component yarn and/or the third component yarn, and/or by regulating the speed V of the third front roller on line_q3(t), thereby realizing the online change of the pattern size on the fancy yarn.

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

on-line regulating size of fancy yarn knot

When V is_q1(t)∶V_q2(t)∶V_q3When the ratio of (t) to (1.15-1.3) to 1: 1.15-1.3, the first component yarn and the third component yarn are decoration yarns (decoration yarns Y)₁+Y₃) The second component yarn and the fourth component yarn are core yarns; the first component yarn and the third component yarn are alternately twisted and twisted with each other on the second component yarn and the fourth component yarn (core yarn Y)₂+X₁) The knot is formed, and the linear density of the decorative yarn is as follows:

on-line regulation and control of rear roller shaft V through PLC_h(t) and an auxiliary shaft V_f(t) the change of the speed can regulate and control the change of the linear density of the decorative yarn, and when the feeding speed of the rear roller shaft and the auxiliary shaft is increased, the linear density of the decorative yarn is increased; when the feeding speed of the rear roller shaft and the auxiliary shaft is reduced, the linear density of the decorative yarn is reduced, so that the size of the knot is changed;

② online regulating and controlling size of fancy yarn ring

When V is_q1(t)∶V_q2(t)∶V_q3When the ratio of (t) is (1.3-3) to 1: 1.3-4), the first component yarn and the third component yarn are decorative yarns (decorative yarns Y)₁+Y₃) The second component yarn and the fourth component yarn are core yarns (core yarn Y)₂+X₁) (ii) a The first component yarn and the third component yarn are alternately twisted and twisted to form loops on the second component yarn and the fourth component yarn, and the linear density of the decorative yarn is as follows:

on-line regulation and control of rear roller shaft V through PLC_h(t) and an auxiliary shaft V_f(t) the change of the speed can regulate and control the change of the linear density of the decorative yarn, when the feeding speed of the rear roller shaft and the auxiliary shaft is increased, the linear density of the decorative yarn is increasedIncreasing; when the feeding speed of the rear roller shaft and the auxiliary shaft is reduced, the linear density of the decorative yarn is reduced;

at the same time, overfeed of the decorative yarn relative to the core yarn speed, i.e. the speed V of the first front roller, is regulated_q1(t) and third front roller speed V_q3(t) relative to the second front roller speed V_q2(t) the overfeeding amount is large when the overfeeding is large, and is small when the overfeeding is small, so that the size of the formed fancy yarn loop is adjusted and controlled on line;

③ on-line regulating and controlling thickness and length of fancy yarn plait

When V is_q1(t)∶V_q2(t)∶V_q3When t is 1 to 1.3-4 to 1, the first component yarn and the third component yarn are core yarns (core yarn Y)₁+Y₃) The second component yarn and the fourth component yarn are decorative yarns (decorative yarns Y)₂+X₁) (ii) a The decorative yarn is alternately twisted on the core yarn to form a circle, the decorative yarn is strong twisted yarn, and the circle formed by the decorative yarn under the action of twisting stress is immediately twisted into a braid;

on-line regulating and controlling rotating speed V of second front roller_q2(t) relative to the first front roller speed V_q1(t) and third front roller speed V_q3And (t) overfeeding amount, namely overfeeding amount of the linear speed of the on-line regulating and controlling decorative yarn relative to the linear speed of the core yarn, wherein 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 is regulated and controlled on line.

Furthermore, the component yarns forming the decorative yarns are colorful yarns, the change of the blending ratio of the decorative yarns can be regulated and controlled by regulating and controlling the speed of the middle roller shaft, the rear roller shaft and/or the auxiliary shaft through the PLC, and when the decorative yarns form patterns, the online change of the colors of the spinning patterns (knots, braids, loops and the like) is realized by regulating and controlling the change of the blending ratio of the decorative yarns.

Further, the speeds of the rear roller and the middle roller on the first channel, the second channel and/or the third channel and the three front rollers are regulated and controlled through the PLC, the wrapping structure and the wrapping ratio of each component of the fancy yarn can be regulated and controlled, and therefore 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 hollow spindle spinning system.

Let the linear densities of three rovings (i.e., first to third component yarns), the core yarn (fourth component yarn), and the solid yarn (i.e., fifth component yarn) as the decoration yarn be ρ₁、ρ₂、ρ₃、ρ_x、ρ_gAfter alternating drafting, alternate twisting and yarn-fixing covering, the linear density of the fancy yarn is rho_hyLet V be the speed of the three front rollers, the speed of the rear roller, the speeds of the middle roller and the auxiliary shaft, and the core yarn delivery speed (i.e., the rotation speed of the take-off roller) during spinning_q1(t)、V_q2(t)、V_q3(t)、V_h(t)、 V_z(t)、V_f(t)、V_R1(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 the decorative yarn and blending ratio of the first to third component yarns

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

3. linear density of the fifth component yarn as the fixing yarn:

ρ_g(t)＝ρ_g (6)

4. linear density of fancy yarn and coating ratio of five component 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 view of a hollow spindle fancy yarn forming device provided in embodiment 1 of the present invention;

fig. 2 is a schematic view of first to fifth passages of the hollow-spindle effect yarn forming device in example 1;

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

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

fig. 5 is a circuit diagram of a comparison module in a hollow spindle fancy yarn forming apparatus according to embodiment 3 of the present invention.

Reference numerals:

Y₁-a first component yarn; y is₂-a second component yarn; y is₃-a third component yarn; x₁-a fourth component yarn; g₁-a fifth component yarn; r₁-a take-off roller; r₂-a hollow spindle; d₁-a first twist point; d₂-a second twist point; 41-a first back roller; 42-a second back roller; 43-third back roller; 51-a first carrier gear; 52-second carrier gear; 53-third carrier gear; 61-a first middle roller; 62-a second middle roller; 63-third 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 first front axle; 11-a third 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 third main gear; 721-third counter gear; 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 fig. 1 to 3, the present embodiment provides a four-channel hollow spindle fancy yarn forming apparatus, including: for first component yarn Y₁First passage A of₁B₁C₁D₁D₂E. For second component yarn Y₂Second passage A for passing₂B₂C₂D₁D₂E. For third component yarn Y₃Through the third channel A₃B₃C₃D₁D₂E. For fourth component yarn X₁Through the fourth passage R₁C₂D₁D₂E。

The first channel is sequentially provided with a first back roller 41, a first middle roller 61, a first front roller 71 and a first twisting point D₁And a second twist point D₂(ii) a The second channel is sequentially provided with a second back roller 42, a second middle roller 62, a second front roller 72 and a first twisting point D₁And a second twist point D₂(ii) a The third channel is sequentially provided with a third back roller 43, a third middle roller 63, a third front roller 73 and a first twisting point D₁And a second twist point D₂(ii) a A second front roller 72 and a first twisting point D are sequentially arranged on the fourth channel₁And a second twist point D₂。

The areas among the back rollers, the middle rollers and the front rollers on the first channel, the second channel and the third channel are drafting areas, and the first front roller 71, the second front roller 72, the third front roller 73 and the first twisting point D1 form an interactive twisting triangular area C₁C₂C₃D₁D₂E, independently moving the first front roller 71, the second front roller 72 and the third front roller 73 respectively to introduce the corresponding component yarns into the interactive twisting triangular area C respectively₁C₂C₃D₁D₂E。

A hollow spindle R is arranged at the second twisting point₂The main body of the fancy yarn passes through the hollow spindle R₂Hollow spindle R₂Fast rotating, hollow spindle R₂Of the fifth component yarn G₁And the fancy yarn main body is crossed and coated.

The embodiment also comprises a filament bobbin and a false twister, the filament bobbin is sleeved on the hollow spindle and synchronously rotates along with the hollow spindle, and the fifth component yarn G₁Winding on the filament bobbin. The false twister is used for twisting the fancy yarn main body.

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 between the first middle roller 61 and the first back roller 41 constant and not more than 1.4; the second back roller 42 is connected with the second middle roller 62 through a second transmission gear set, and the second transmission gear set is used for keeping the traction ratio between the second middle roller 62 and the second back roller 42 constant and not more than 1.4; the third back roller 43 and the third middle roller 63 are connected through a third transmission gear set, and the third transmission gear set is used for keeping the traction ratio between the third middle roller 63 and the third back roller 43 constant and not more than 1.4.

In the first channel, the second channel and the third channel of the utility model, a primary drafting unit is formed between the middle roller and the rear roller, and the front roller and the middle roller form a secondary drafting unit; the speed ratio of the middle roller and the rear roller of the same channel is constant and less than 1.4, the speed of the middle roller and the rear roller of the same channel is synchronously changed relative to the front roller in the channel, and the speed of the middle roller and the rear roller of different channels is alternately changed relative to the front roller, so that the alternating drafting of three groups of rough yarns is realized. 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.

Wherein, a back upper leather roller P is respectively and correspondingly arranged above each back roller, the middle roller and the front roller₄Middle and upper leather roller P₆And anterior epithelium roller P₇The upper leather roller is matched with the lower roller to clamp the yarn. Preferably, the upper leather roller is correspondingly arranged above the middle roller on the same channel among the first channel, the second channel and the third channel, and the yarn forming device also comprises an upper leather ring Q which is sleeved on the upper leather roller and the upper pin and keeps synchronous movement with the middle roller₁A lower leather ring Q sleeved on the middle roller and the lower pin and keeping synchronous movement with the middle roller₂(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.

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 69% compared with the prior art, meanwhile, the end breakage rate of the yarn in the second drafting zone is reduced by 43%, and the probability of appearance of unstable points with thickness mutation is reduced by 37.5% compared with the prior art.

The fourth channel also comprises a pull-out roller R₁Drawing roller R₁The second front roller 72, the first twisting point D1 and the second twisting point D2 are arranged in this order.

The embodiment also comprises a rear roller shaft 4 and a middle roller shaft 6; in the circumferential direction of the rear roller shaft 4, the first rear roller 41 is relatively fixedly sleeved on the rear roller shaft 4 through a key, and the second rear roller 42 and the third rear roller 43 are relatively rotatably sleeved on the rear roller shaft 4 through a bearing; in the circumferential direction of the middle roller shaft 6, the first middle roller 61 and the third middle roller 63 are relatively rotatably sleeved on the middle roller shaft 6, and the second middle roller 62 is relatively fixedly sleeved on the middle roller shaft 6. Therefore, the feeding speeds of the first component yarn and the second component yarn can be respectively regulated and controlled through the rear roller shaft 4 and the middle roller shaft 6.

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

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; the third transmission gear set comprises a third driving gear 631, a third carrier gear 53 and a third driven gear 431 which are in meshing transmission in sequence; the third driving gear 631 is coaxially and fixedly connected with the third middle roller 63, and the third driven gear 431 is coaxially and fixedly connected with the third rear roller 43.

The embodiment also comprises an auxiliary shaft 5, a first front shaft 8 and a third front shaft 11, in the circumferential direction, a third intermediate gear 53 is sleeved on the auxiliary shaft 5 relatively and fixedly, a first intermediate gear 51 and a second intermediate gear 52 are movably sleeved on the auxiliary shaft 5, and the rotating speeds of the third rear roller 43 and the third middle roller 63 can be synchronously adjusted through the auxiliary shaft 5. The first front shaft 8 is connected with the first front roller 71 through a first gear transmission pair, the third front shaft 11 is connected with the third front roller 73 through a third gear transmission pair, and the rotating speeds of the first front roller 71 and the third front roller 73 can be respectively regulated and controlled through the first front shaft 8 and the third front shaft 11. The first gear transmission pair includes: a first main gear 81 and a first auxiliary gear 711 which are in mutual meshing transmission, wherein the first main gear is fixedly sleeved on the first front shaft 8, and the first auxiliary gear is fixedly connected with the first front roller 71 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, wherein the third main gear is fixedly sleeved on the third front shaft 11, and the third pinion is fixedly connected with the third front roller 73 in a coaxial manner.

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 spindle motor is used for driving the hollow spindle to rotate, and comprises a first servo motor used for driving the rear roller shaft 4 to rotate, a second servo motor used for driving the middle roller shaft 6 to rotate, a third servo motor used for driving the auxiliary shaft to rotate, a fourth servo motor used for driving the first front shaft, a fifth servo motor used for driving the third front shaft, a sixth servo motor used for driving the front roller shaft 7 to rotate, and a spindle motor used for driving the hollow spindle to rotate.

The rotation speed sensor includes: a first sensor, a second sensor, a third sensor, a fourth sensor, a fifth sensor and a sixth sensor for monitoring the rotating speeds of the rear roller shaft 4, the middle roller shaft 6, the auxiliary shaft, the first front shaft, the third front shaft and the front roller shaft 7 respectively, a spindle sensor for monitoring the rotating speed of the hollow spindle and a false twister sensor for monitoring the speed of the false twister.

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

The utility model provides a pair of adopt hollow spindle fancy yarn forming device of above-mentioned four passageways, hollow spindle spinning system who has four ways spinning passageway and two twist points through the construction, the front roller of first twist point by three coaxial and different rotational speeds exports three routes respectively and short fiber yarn (or filament) of the same kind accomplishes mutual twist and forms fancy yarn main part in the twisting triangular space, fifth way short fiber yarn (or filament) by the output carries out the cladding twist with the fancy yarn main part that has already formed at second twist point, form and contain the fancy yarn of decorations yarn, core yarn and solid yarn, realize the decorations, the heart yearn, the spinning of the hollow spindle fancy yarn of solid one-step method.

Example 2

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

1. Spinning of hollow 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 three paths of untwisted yarn strips and one path of staple fiber yarn (or filament yarn), and are alternately twisted under the action of twisting force to form a main body of the fancy yarn; at the second twisting point, the spun yarn (or filament) output by the fifth channel and the formed main body of the fancy yarn are coated and twisted to form the fancy yarn, and the spinning of the hollow spindle fancy yarn by one-step method of decoration yarn, core yarn and solid yarn is realized.

2. Fancy yarn with on-line changing wrapping structure

By regulating the speeds of the rear roller and the middle roller and the three front rollers on the first channel, the second channel and/or the third channel, 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;

Fancy yarn spinning method for single-twist coating structure

In this embodiment, an untwisted strand or yarn is twisted at a first twist point and covered with a solid yarn at a second twist point to form a fancy yarn structure. The utility model discloses in the device, first to the three channels correspond first to three front roller respectively, roller before the fourth channel corresponds the second.

Because the roving Y₁The (first component yarn) is output by a first front roller after being subjected to alternating drafting in a first channel, and the roving yarn Y₂(i.e. second component yarn) is passed through second channel and alternatively drafted, and is delivered from second front roller, and the yarn X₁(i.e., the fourth component yarn) is delivered from the second front roller through the fourth passage, and the roving yarn Y is delivered₃(namely the third component yarn) is output by a third front roller after being subjected to alternating drafting through a third channel. At the moment, the output strand finishes single twisting at the first twisting point, and is output by the fixed line G of the fifth channel at the second twisting point₁(i.e., the fifth component yarn) is wrapped to form a single twist wrapped fancy yarn structure. For example, untwisted strands drawn through the first pass are twisted at the first twist point and are fixed at the second twist point₁The fancy yarn is wrapped to form a single twist wrapped structure. In this way (Y) can be formed₁+G₁)、(Y₂+G₁)、(Y₃+G₁)、 (X₁+G₁)、[(Y₂+X₁)+G₁]And the five kinds of fancy yarns with single-twist coating structures.

(2) Spinning fancy yarns with a cross-twisting and cladding structure:

the twisted and covered structure of the fancy yarn means that two untwisted strands (or yarns) are twisted at a constant speed at a first twisting point and covered by a fixed yarn at a second twisting point to form the fancy yarn structure. In the embodiment, two strands are output by two front rollers at the same speed and are twisted at a first twisting point, and a fixed line G is output by a fifth channel at a second twisting point₁The coating forms a twisted and coated fancy yarn structure. In this way [ Y ] can be formed₁+Y₂+G₁]、[Y₁+Y₃+G₁]、[Y₂+Y₃+G₁]、[Y₁+X₁+G₁]、 [Y₂+X₁+G₁]、[Y₃+X₁+G₁]And six kinds of fancy yarn with a cross-twisting and coating structure.

(3) Spinning fancy yarns with winding and twisting coating structures:

the twisted and wrapped structure of the effect yarn is a structure in which three or more untwisted strands (or yarns) are twisted at a first twist point at a non-constant speed and are wrapped with a solid yarn at a second twist point to form the effect yarn. In this embodiment, three or more untwisted strands (or yarns) are non-uniformly delivered from three front rollers at different speeds, and are non-uniformly twisted at a first twisting point and delivered from a fifth path at a second twisting point₁The coating forms a twisted and coated fancy yarn structure. In this way [ Y ] can be formed₁+(Y₂+X₁)+Y₃+G₁]、 (Y₁+X₁+Y₃+G₁)、(Y₁+Y₂+Y₃+G₁) And the three types of fancy yarns with the winding and twisting covering structures.

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

The twisting phenomenon is generated at a first twisting point by a plurality of strands output by the three front rollers at different speeds, three groups of strands twisted with each other along with the increase of the speed difference are obviously separated into decoration yarns and core yarns, and the decoration yarns are twisted on the core yarns to form various fancy yarn shapes such as knots, braids, loops and the like.

In this embodiment, the speeds of the rear roller, the middle roller and the three front rollers are adjusted and controlled on line, so that the online change of the combination pattern of the decoration yarns and the core yarns, the online change of the combination pattern of the knots, the braids, the loops and the like, the online change of the sizes of the knots, the braids, the loops and the like, the online change of the colors of the knots, the braids, the loops and the like, and the spinning of the combined fancy yarns with changeable appearance forms can be realized.

(1) Fancy yarn spinning with online change of decoration yarn and core yarn combination mode

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, and the fourth component yarn is respectively introduced into the interactive twisting triangular area through the second front roller; the component yarn (strand) with the lowest speed of the front roller is the core yarn of the fancy yarn, the component yarn with the higher speed of the front roller is the 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 front roller feeding speed of the first component yarn, the second component yarn, the third component yarn and/or the fourth component yarn on line.

For example, roving Y₁、Y₂、Y₃Respectively pass through first to three channels to make alternative drafting, and then pass through first to three front rollers and make V-shaped draft_q1(t)、V_q2(t)、V_q3(t) delivery of yarn X₁From the second front roller by V_q2And (t) outputting. Generally, the strands with the lowest speed of the front roller become core yarns of the effect yarns, and the strands with relatively higher speed become core yarns of the effect yarns. When V is_q1(t) minimum, Y₁Is a core yarn, (Y)₂+X₁) And Y₃Is a decorative yarn; when V is_q2(t) minimum time (Y)₂+X₁) As core yarn, Y₁And Y₃Is a decorative yarn; when V is_q3(t) minimum, Y₃Is a core yarn, (Y)₂+X₁) And Y₁Is a decorative yarn. Thus, V is regulated by PLC_q1(t)、V_q2(t)、V_q3(t) the online change of the combination mode of the decoration yarns and the core yarns can be realized.

(2) Spinning of fancy yarn with online change of knot, braid, loop and other pattern combinations

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_q3Under the condition of keeping the rotation speed of the back roller and the rotation speed of the middle roller on the first channel, the second channel and the third channel unequal and non-zero (namely V)_h(t)≠V_z(t) ≠ 0), and V is regulated and controlled by a controller_q1(t)∶V_q2(t)∶V_q3The ratio of (t) can realize the on-line change of various pattern combinations on the fancy yarn. The patterns include, but are not limited to, knots, braids, loops, and the like.

When V_q1(t)∶V_q2(t)∶V_q3When (t) is (1.15-1.3): 1, the first component yarn, the second component yarn and the fourth component yarn (the decoration yarn Y)₁+Y₂+X₁) Intertwining and twisting the third component yarn (core yarn Y)₃) Forming a knot thereon;

d when V_q1(t)∶V_q2(t)∶V_q3When t is 1: 1.3-4, the third component yarn (decorative yarn Y)₃) Alternately twisted and twisted on the first component yarn, the second component yarn and the fourth component yarn (core yarn Y)₁+Y₂+X₁) Forming a braid or a ring;

v represents_q1(t)∶V_q2(t)∶V_q3When the ratio of (t) is (1.15-1.3) to 1 (1.15-1.3), the first component yarn and the third component yarn are alternately twisted and twisted with each otherForming knots on the four-component yarns;

when V_q1(t)∶V_q2(t)∶V_q3When the ratio of (t) is (1.3-4) to 1: 1.3-4), the first component yarn and the third component yarn are alternately twisted and twisted to form loops on the second component yarn and the fourth component yarn.

(3) Spinning of fancy yarn with patterns of knots, braids, loops and the like changing 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.

By online regulation of the speed V of the middle roller in the first channel, the second channel and/or the third channel_z(t) and speed V of the back roller_h(t) further changing the linear density of the first component yarn, the second component yarn and/or the third component yarn, and/or by regulating the speed V of the third front roller on line_q3(t), thereby realizing the online change of the pattern size on the fancy yarn.

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

on-line regulating size of fancy yarn knot

② online regulating and controlling size of fancy yarn ring

on-line regulation and control of rear roller shaft V through PLC_h(t) and an auxiliary shaft V_f(t) the change of the speed can regulate and control the change of the linear density of the decorative yarn, and when the feeding speed of the rear roller shaft and the auxiliary shaft is increased, the linear density of the decorative yarn is increased; when the feeding speed of the rear roller shaft and the auxiliary shaft is reduced, the linear density of the decorative yarn is reduced; at the same time, overfeed of the decorative yarn relative to the core yarn speed, i.e. the speed V of the first front roller, is regulated_q1(t) and third front roller speed V_q3(t) relative to the second front roller speed V_q2(t) the overfeeding amount is large when the overfeeding is large, and is small when the overfeeding is small, so that the size of the formed fancy yarn loop is adjusted and controlled on line;

③ on-line regulating and controlling thickness and length of fancy yarn plait

When V is_q1(t)∶V_q2(t)∶V_q3When t is 1 to 1.3-4 to 1, the first component yarn and the third component yarn are core yarns (core yarn Y)₁+Y₃) A second component yarn andthe fourth component yarn is a decorative yarn (decorative yarn Y)₂+X₁) (ii) a The decorative yarn is alternately twisted on the core yarn to form a circle, the decorative yarn is strong twisted yarn, and the circle formed by the decorative yarn under the action of twisting stress is immediately twisted into a braid;

on-line regulating and controlling rotating speed V of second front roller_q2(t) relative to the first front roller speed V_q1(t) and third front roller speed V_q3(t) overfeeding amount, namely overfeeding amount of the linear speed of the on-line regulating and controlling decorative yarn relative to the linear speed of the core yarn, wherein 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 is regulated and controlled on line;

(4) spinning of fancy yarn with patterns and colors of knots, braids, loops and the like changing on line

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 it is a roving Y for a decorative yarn₁、Y₂、Y₃The color roving is adopted, and the roving with three colors can be selected from seven-color roving such as red, orange, yellow, green, cyan, blue, purple and the like.

The component yarn forming the decorative yarn is color yarn, and the speed V of the middle roller shaft, the rear roller shaft and/or the auxiliary shaft is regulated and controlled by PLC_h(t)、V_z(t)、V_fAnd (t) regulating and controlling the change of the blending ratio of the decorative yarns, and realizing the online change of colors of the spinning patterns (knots, braids, loops and the like) by regulating and controlling the change of the blending ratio of the decorative yarns when the decorative yarns form the patterns.

For example, the first component yarn, the second component yarn and the third component yarn are respectively colored roving yarns, and the linear densities of the first component yarn, the second component yarn and the third component yarn are respectively rho₁、ρ₂、ρ₃The blending ratio of the decorative yarn is K_h1(t)、K_h2(t)、K_h3(t) the following:

the online color change of the spinning patterns (knots, braids, loops and the like) is realized by regulating and controlling the change of the blending ratio of the decorative yarns.

4. Fancy yarn with online color change

The speeds of the back roller and the middle roller on the first channel, the second channel and/or the third 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 equations (6), (7), (8), (9) and (10), if five slivers are fed in two twisting processes₁、ρ₂、ρ₃、ρ_x、ρ_gThe colors are respectively selected from red, orange, yellow, green, blue, purple, black, white and the like, and the colors of the fancy yarn can be adjusted and controlled by changing the coating ratio.

Let the covering ratio of the fancy yarn be K_h1(t)、K_h2(t)、K_h3(t)、K_h4(t) the linear density of the effect yarn is ρ_hy(t), the servo motor is regulated and controlled by the PLC and drives the V_h(t)、V_z(t)、V_q1(t)、V_q2(t)、V_q3(t)、V_R1(t) so that it satisfies the following formula:

V_h(t)＝K_h1(t)*ρ_hy(t)/ρ₁ (14)

V_z(t)＝C*K_h2(t)*ρ_hy(t)/ρ₂ (15)

V_f(t)＝K_h3(t)*ρ_hy(t)/ρ₃ (16)

V_R1(t)＝K_h4(t)*ρ_hy(t)/ρ_X (17)

therefore, the speeds of the rear roller, the middle roller, the auxiliary roller and the front roller and the twist of the wrapping twist 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 of the fancy yarn is regulated and controlled on line.

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 connected to the first sensor, the second sensor, the third sensor and the controller, the first comparison module is configured to monitor a rotation speed ratio between the middle roller shaft 6, the rear roller shaft 4 and the auxiliary shaft, and the controller regulates and controls the rotation speed of the middle roller shaft 6, the rear roller shaft 4 and/or the auxiliary 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, the second component yarn and the third 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 because various error reasons lead to well roller shaft 6, back roller shaft 4 or auxiliary shaft rotational speed surpass respectively and set for error range, as long as guarantee the back roller shaft 4 of first comparison module feedback, well roller shaft 6 and auxiliary shaft three's rotational speed ratio (be first component yarn, the feeding speed ratio of second component yarn and third component yarn) in setting for error range, can continue production and need not additionally adjust the actual rotational speed of back roller shaft 4, well roller shaft 6 or auxiliary shaft. Compare prior art, a plurality of parameters such as well roller and back roller in the different passageways of needs simultaneous monitoring are compared, 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%.

In addition, the second comparison module is respectively connected with the sixth 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. Therefore, the regulation and control precision of the control system is further 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 shutdown or the adjustment time in the production process is avoided, and the production efficiency of the equipment is improved.

Finally, it should be noted that: the above embodiments are only 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 hollow 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;

2. The hollow fancy yarn forming device of 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;

the third back roller is connected with the third middle roller through a third transmission gear set, and the third transmission gear set is used for keeping the traction ratio between the third middle roller and the third back roller constant and not more than 1.4.

3. The hollow fancy yarn forming apparatus of claim 2, further comprising a rear roller shaft and a middle roller shaft;

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

4. The hollow fancy yarn forming apparatus of claim 2, further comprising a front roller shaft; in the circumference of preceding roller axle, roller and the suit of roller before the third can rotate relatively in the preceding roller axle is last, roller fixedly suit relatively before the second is in on the preceding roller axle.

5. The hollow fancy yarn forming device of claim 2, wherein the first transmission gear set comprises a first driving gear, a first intermediate gear and a first driven gear which are in meshing transmission 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;

6. The hollow fancy yarn forming device of claim 5, further comprising an auxiliary shaft, wherein the third intermediate gear is sleeved on the auxiliary shaft in a relatively fixed manner in the circumferential direction, the first intermediate gear and the second intermediate gear are movably sleeved on the auxiliary shaft, and the rotating speed of the third rear roller and the third middle roller can be synchronously adjusted through the auxiliary shaft.

7. The hollow fancy yarn forming device of claim 4, further comprising a first front shaft and a third front shaft, wherein the first front shaft is connected with the first front roller through a first gear transmission pair, the third front shaft is connected with the third front roller through a third gear transmission pair, and the rotation speeds of the first front roller and the third front roller can be respectively regulated and controlled through the first front shaft and the third front shaft.

8. The hollow-boule fancy yarn forming apparatus of claim 7, 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;

9. The hollow-spindle fancy yarn forming apparatus as claimed in claim 1, further comprising a filament bobbin, the filament bobbin being fitted over the hollow spindle and rotating synchronously with the hollow spindle, the fifth component yarn being wound around the filament bobbin.