CN209836441U - Single drafting channel hollow spindle fancy yarn forming device - Google Patents

Abstract

The utility model provides a hollow spindle fancy yarn forming device with a single drafting channel. The yarn forming device includes a drafting channel and a first auxiliary channel; the channel is provided with a first twisting point and a second twisting point; the first The component yarn and the second component yarn are twisted alternately through the first twisting point to form the main body of the fancy yarn; the second twisting point is provided with a hollow spindle, the main body of the fancy yarn passes through the hollow spindle, and the hollow spindle quickly Rotating, the fixed yarn on the hollow spindle intersects with the fancy yarn main body and wraps the fancy yarn main body. The utility model realizes one-step spinning of fancy yarns, and at the same time regulates the speed of the decorative yarns and the core yarns to be fed into the twisting point, regulates the linear density and blending ratio of the decorative yarns, and regulates the twist of the core yarns to regulate the core yarns. Technical means such as the switching of decorative yarns can realize online changes in the color and shape of fancy yarn slubs, belly, knots, loops, and braids, and expand new varieties of fancy yarns.

Description

Single drafting channel hollow spindle fancy yarn forming device

technical field

The utility model relates to the technical field of spinning in textile engineering, in particular to a single-drawing channel hollow spindle fancy yarn forming device.

Background technique

The production of fancy yarns on hollow spindle spinning machines usually adopts a two-step method. In the first step, the core yarn, decorative yarn and fixed yarn are spun separately; in the second step, the core yarn fed at different speeds is False-twisting of the decorative yarn, through the overfeeding of the decorative yarn to the core yarn, the decorative yarn is twisted on the core yarn to form knots, circles, braids and other patterns, and then the fixed yarn unwound from the hollow spindle is used to wrap the The formed flower knot is fixed to form a hollow spindle fancy yarn. The main problems in the production of fancy yarns on hollow spindle spinning machines are as follows:

1) The color change of the fancy yarn cannot be controlled when the hollow spindle is spinning the fancy yarn: In order to realize the color change of the fancy yarn, one is to control the mutual wrapping relationship of the decorative yarn, the core yarn and the fixed yarn, and the other is to control the color change of the fancy yarn. Controls the color of the upholstery. The traditional hollow spindle spinning machine still lacks the means to control the intertwining relationship of decorative yarn, core yarn and fixed yarn in the production of fancy yarn, and it is also unable to control the color of decorative yarn, so it is impossible to control the change of fancy yarn color;

2) The size and color of knots, loops, and braids cannot be controlled when hollow spindles spin fancy yarns: hollow spindle fancy yarns contain three components (core yarn + decorative yarn + fixed yarn), of which decorative yarn It is the main body to form fancy knots, loops, and braids. The traditional hollow spindle spinning machine cannot control the thickness and color changes of decorative yarns online, so it is impossible to control the size and color changes of knots, loops, and braids;

3) The combination of the core yarn and the decorative yarn cannot be adjusted when the hollow spindle spins the fancy yarn: when the hollow spindle spins a three-thread fancy yarn including (core yarn + decorative yarn + fixed yarn), only one decorative yarn can be realized. The simple combination of yarn and a core yarn cannot realize multiple combinations of multiple decorative yarns and multiple core yarns, so the online regulation of the combination of decorative yarns and core yarns cannot be realized.

4) When the hollow spindle spins fancy yarns, it is impossible to control the change of the covering ratio of the core yarn, decorative yarn and fixed yarn: when the hollow spindle spins a three-thread fancy yarn containing (core yarn + decorative yarn + fixed yarn), at There is no control means in the process of twisting the core yarn and decorative yarn and covering with fixed yarn, so it is impossible to control the change of the covering ratio of core yarn, decorative yarn and fixed yarn online.

5) low efficiency and high production cost. Due to the above-mentioned problems in the hollow spindle spinning machine, it is difficult to change the wrapping structure, shape, color, The style and feel cannot meet the needs of fancy yarn clothing fabrics with various shapes, rich and delicate colors, and smart and avant-garde styles.

Utility model content

The purpose of this utility model is to provide a double-channel hollow spindle spinning fancy yarn device and a one-step forming method, through alternate drafting-coordinated conveying-intertwisting and coating and other processes, the decorative yarn, core yarn and The fixed yarns are combined into complex fancy yarns including knots, loops, braids and other combined patterns to solve at least one technical problem in the prior art.

In order to solve the above technical problems, the utility model provides a hollow spindle fancy yarn forming device with a single drafting channel, comprising: a drafting channel for the passage of the first component yarn, a passage for the passage of the second component yarn The first auxiliary channel; the rear roller, the middle roller, the first front roller, the first twisting point and the second twisting point are sequentially arranged on the drafting channel; the second front roller, the second front roller, and the second twisting point are successively arranged on the first auxiliary channel said first twist point and said second twist point;

The area between the rear roller, the middle roller and the first front roller on the drafting channel is the drafting area, and an alternate twisting triangle is formed between the first front roller, the second front roller and the first twisting point; the first front roller and the second front roller move independently, and respectively introduce the corresponding component yarns into the intertwisting triangular area; one or both of the first component yarn and the second component yarn are led to the intertwisting triangular area After being twisted and twisted in the zone, the main body of the fancy yarn is formed;

The second twisting point is provided with a hollow spindle, the fancy yarn main body passes through the hollow spindle, the hollow spindle rotates rapidly, and the fixed yarn on the hollow spindle meets the fancy yarn main body and touches the fancy yarn main body. To wrap.

The utility model breaks through the technical bottleneck of hollow spindle spinning in the formation of fancy yarns, and realizes fancy yarns (including core yarns and decorative yarns) One-step spinning) and at the same time, it is realized by adjusting the output speed of decorative yarn and core yarn, adjusting the linear density and blending ratio of decorative yarn, adjusting the twist of core yarn, and adjusting the switching between core yarn and decorative yarn. The online change of the color and shape of fancy yarn slubs, belly, knots, loops, and braids expands new varieties of fancy yarns.

Further, it also includes a filament bobbin, the filament bobbin is set on the hollow spindle and rotates synchronously with the hollow spindle, and the fixed yarn is wound on the filament bobbin.

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

Further, the rear roller and the middle roller are connected through a first transmission gear set, and the first transmission gear set is used to keep the traction ratio (linear speed ratio) between the middle roller and the rear roller constant and not greater than 1.4 .

The first-level drafting unit (i.e. the first drafting area) is formed between the middle roller and the rear roller in the utility model, and the front roller and the middle roller form a second-level drafting unit (i.e. the second drafting area). The speed ratio of the middle and rear rollers is constant and less than 1.4, and the speed ratio of the middle and rear rollers in different passages is changed alternately relative to the front rollers to realize the alternate drafting of the first component yarn. Especially important, the primary drafting is pre-drawing, the primary drafting ratio e _h is a constant C is the constant drafting, and the primary drafting ratio e _h = C ≤ 1.4, which can ensure the continuity of the roving, No draft singularity occurs in the first draft zone. At the same time, the pre-drawing process can straighten, tension and orient the fibers inside the roving, so as to prepare for slippage during the main drafting process, reduce the breakage rate or singularity rate in the main drafting process, and make the drafting and twisting The process is more stable, greatly reducing the labor intensity of workers.

Further, the first front roller and the second front roller are coaxial and relatively rotatable in the circumferential direction. Wherein preferably, the first component yarn is a roving, and the second component yarn is a core yarn.

Further, it also includes a third component yarn, and a second auxiliary channel for passing the third component yarn; the second auxiliary channel is sequentially provided with a third front roller, the first twisting point and the The second twisting point: one or both of the first component yarn, the second component yarn and the third component yarn are introduced into the intertwined triangle area and twisted to form the fancy yarn main body.

Further, in the circumferential direction, the third front roller and the second front roller are relatively fixedly arranged.

Further, the first auxiliary channel also includes a first take-off roller (first unwinding shaft), the first take-off roller, the second front roller, the first twisting point and the second twisting point in turn set up;

And/or, the second auxiliary channel also includes a second take-off roller (second unwinding shaft), the second take-off roller, the third front roller, the first twisting point and the second twisting point Set in turn.

Wherein preferably, a middle upper top roller is correspondingly arranged above the middle roller, and the yarn forming device also includes an upper apron that is sleeved on the middle upper top roller and the upper pin and keeps moving synchronously with the middle roller, and is sleeved on the middle roller and the upper pin. The lower apron on the lower pin and keeps moving synchronously with the middle roller; the distance between the gripping jaws of the upper apron and the lower apron and the jaw line of the front roller is less than 3mm.

Secondary drafting e _q is dynamic main drafting, and the speed of the middle roller changes relative to the front roller. When the blending ratio K=0% of the first component yarn in the drafting passage, the passage yarn When the secondary draft ratio e _q =∞, the channel yarn forms a draft singularity in the second draft zone, and the distance δ≤3mm between the draft singularity and the nip of the front roller (existing The distance between the rear roller and the middle roller in the technology is generally greater than 25mm, and the position of the drafting singularity in the first drafting zone is randomly distributed between the middle and rear rollers. When the distance between the drafting singularity and the nip of the middle roller exceeds 3mm , the time when the drafting singularity is fed into the nip of the middle roller again has uncertain factors. If the coordination is not good, it will either produce coarse details, or cause spinning breakage, making spinning an unstable process and affecting spinning. Yarn reliability and yarn quality). When K gradually increases, with the synchronous start of the rear roller and the middle roller, the strands held by the upper and lower aprons are instantly fed into the jaws of the front roller for secondary drafting, so it is located in the secondary drafting area The draft singularity does not affect the spinning stability.

Further, it also includes rear roller shaft, middle roller shaft and auxiliary shaft;

In the circumferential direction of the rear roller shaft, the rear roller (for example by means of a bearing) is rotatably looped on the rear roller shaft;

In the circumferential direction of the middle roller shaft, the middle roller is rotatably looped on the middle roller shaft;

The first transmission gear set includes the first driving gear, the first bridge gear and the first driven gear which are sequentially meshed and driven; the first driving gear is fixedly connected to the rear roller coaxially, and the first driven gear is connected to The middle roller is fixedly connected to the shaft;

The first bridge gear is relatively fixedly sleeved on the auxiliary shaft.

Thus, the rear roller and the middle roller can be synchronously driven to run through the auxiliary shaft, thereby adjusting the feeding (feeding) speed of the first component yarn.

Further, it also includes the front roller shaft;

In the circumferential direction of the front roller shaft, the first front roller is relatively fixedly sleeved on the front roller shaft; the second front roller and the third front roller are relatively rotatably sleeved on the front roller shaft superior.

Further, it also includes a second front axle, the second front axle is connected with the second front roller through the second gear transmission pair; the second front axle is connected with the third front roller through the third gear transmission pair; The two front axles can synchronously drive the second front roller and the third front roller to rotate.

Further, the second gear transmission pair includes: a second main gear and a second auxiliary gear that are meshed with each other, the second main gear is fixedly sleeved on the second front axle, the second auxiliary gear is connected to the second The front roller is fixedly connected with the axis;

The third gear transmission pair includes: a third main gear and a third auxiliary gear that are meshed with each other, the third main gear is fixedly sleeved on the second front axle, and the third auxiliary gear is the same as the third front roller. Shaft fixed connection.

Wherein, the back roller, the middle roller and the front roller are preferably nested rollers. Wherein, an upper top roller is correspondingly arranged above each rear roller, middle roller and front roller, and the upper top roller cooperates with the lower roller to clamp the yarn.

Further, it also includes a control system and a servo drive system; the servo drive system includes a servo drive and a servo motor; the control system includes a controller and a speed sensor;

The controller is sequentially connected to the servo motor through a servo driver;

The servo motor includes: a first servo motor for driving the front roller shaft, a second servo motor for driving the second front shaft, a third servo motor for driving the auxiliary shaft to rotate, The fourth servo motor for driving the rotation of the first pull-out roller, the fifth servo motor for driving the rotation of the first pull-out roller, and the hollow spindle motor for driving the rotation of the hollow spindle;

The rotational speed sensor includes: a first sensor, a second sensor, a second Three sensors, a fourth sensor and a fifth sensor, and a hollow ingot sensor for monitoring the rotational speed of the hollow spindle.

The controller in the utility model controls the feeding speed of the four component yarns on the four yarn channels through the servo driver and the servo motor in turn, and the speed sensor monitors the actual feeding speed of the four component yarns in real time, and will monitor The values are fed back to the controller, and the controller can adjust the magnitude of the control signals on the four yarn channels according to the monitored values.

Further, the twisting mechanism includes a ring bar, and the controller controls the movement of the ring bar through a servo driver and a servo motor. In addition, the control system also includes a series of instructions and modular programs.

Further, the control system also includes a first comparison module, the first comparison module is respectively connected with the third sensor, the fourth sensor, the fifth sensor and the controller, and the first comparison module is used to monitor the The speed ratio between the auxiliary shaft, the first lead-out roller and the second lead-out roller, the controller adjusts the auxiliary shaft, the first lead-out roller and the second lead-out roller according to the value fed back by the first comparison module The rotation speed of the second take-off roller is controlled, and then the blending ratio of the first component yarn, the second component yarn and the third component yarn is regulated.

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

By adopting the above technical scheme, the utility model has the following beneficial effects:

The utility model provides a hollow spindle fancy yarn forming device using the above-mentioned single drafting channel. By constructing a hollow spindle spinning system with two spinning channels and two twisting points, at the first twisting point (the first at the twisting point) to complete the intertwisting and form the fancy yarn main body, and at the second twisting point (the second twisting point), the output fixed yarn and the formed fancy yarn main body are covered and twisted to form a decorative yarn, Fancy yarns of core yarn and fixed yarn, realize the spinning of decorative thread, core thread and fixed thread one-step hollow spindle fancy yarn.

In addition, by adjusting the synergistic changes in the speed of the rear roller, middle roller and three front rollers, the fancy yarn with multiple structures such as single-twist covering, cross-twisting covering and twisting covering can be spun; The speed of the middle roller and the three front rollers can be changed synergistically, the combination of decoration yarn and core yarn can be changed online, the combination of knots, braids, circles and other patterns can be changed online, the size of knots, braids, circles and other patterns can be changed online Change the color of patterns such as knots, braids, and circles, and spin combined fancy yarns with variable appearance; finally, control the core thread and decorative thread by adjusting the speed of the rear roller, middle roller and three front rollers. And the covering ratio of the fixed thread, the production efficiency is greatly improved by spinning the colored fancy yarn whose color changes on-line.

In addition, the utility model also discloses a fancy yarn forming method using the above-mentioned hollow spindle fancy yarn forming device with single drafting channel.

The hollow spindle spinning device of the utility model is composed of one channel for drafting roving, two channels for core yarn of spun yarn (or filament) and one channel for covering yarn. After the roving is alternately drawn, it becomes untwisted strands with varying thickness, which are output from the drafting channel, and meet the yarn (or filament) output from the other two core yarn channels at the first twisting point. The three strands are twisted alternately and form the main body of the fancy yarn; due to the twisting effect of the hollow spindle, the fixed yarn (or filament) and the main body of the formed fancy yarn are covered and twisted at the second twisting point, thus Form fancy yarns including decorative yarns, core yarns and fixed yarns, and realize the spinning of decorative yarns, core yarns and fixed yarns in one-step hollow spindle fancy yarns.

Further, by adjusting the speeds of the rear roller, the middle roller and the three front rollers on-line, it is possible to cooperate with the input yarn and the core yarn to spin single-twisted covering structure fancy yarn, cross-twisting covering structure fancy yarn and Twisted twist covering structure fancy yarn;

An untwisted sliver or yarn is twisted at the first twisting point through the drafting channel, the first auxiliary channel or the second auxiliary channel, and is covered by the fixed yarn at the second twisting point Form single-twisted covering structure fancy yarn;

Two untwisted strands or yarns are respectively introduced into the intertwisting triangular area through two passages in the drafting passage, the first auxiliary passage or the second auxiliary passage, and are After the first twisting point is twisted at a non-constant speed, it is covered by fixed yarn at the second twisting point to form a cross-twisted covered structure fancy yarn;

Three untwisted strands or yarns are respectively introduced into the intertwined triangular area through the drafting channel, the first auxiliary channel and the second auxiliary channel, and are non-equally twisted at the first twisting point. After fast twisting, it is covered by fixed yarn at the second twisting point to form twisted and covered structure fancy yarn.

Further, assuming that the speeds of the first front roller, the second front roller and the third front roller are V _q1 , V _q2 and V _q3 respectively, by online regulation V _q1 , V _q2 and/or V _q3 ; by online regulation The speed of the back roller, the middle roller and the three front rollers can realize the online change of the combination mode of decorative yarn and core yarn, the online change of the combination mode of knots, braids, circles, etc., and the patterns of knots, braids, and circles. Online change of size, online change of color and color of knots, braids, circles and other patterns, spinning combination fancy yarns with changeable appearance and shape.

Further, the first component yarn, the second component yarn and the third component yarn are respectively introduced into the intertwined triangular area by the first front roller, the second front roller and the third front roller, wherein the front roller speed is the lowest The component yarn (shaft) is the core yarn of the fancy yarn, and the component yarn with a higher speed of the front roller is the decorative yarn of the fancy yarn, and the first front roller, the second front roller and the third front roller are adjusted online The speed can realize the online change of the combination mode of decorative yarn and core yarn in fancy yarn; the specific control method is as follows:

① When V _q1 (t): V _q2 (t): V _q3 (t) = (1.15-1.3): 1:1, the first component yarn (decorative yarn Y) is alternately twisted and kinked in the second group Part yarn and third component yarn (core yarn X ₁ +X ₂ ) form knots;

②When V _q1 (t):V _q2 (t):V _q3 (t)=(1.4-4):1:1, the first component yarn (decorative yarn Y) is intertwined and kinked in the second group Part yarn and the third component yarn (core yarn X ₁ +X ₂ ) form loops;

③ When V _q1 (t): V _q2 (t): V _q3 (t) = (0.90-0.75): 1:1, the second component yarn and the third component yarn (decoration yarn X ₁ +X ₂ ) intertwist and kink to form knots on the first component yarn (core yarn Y);

④ When V _q1 (t): V _q2 (t): V _q3 (t) = (0.60-0.25): 1:1, the second component yarn and the third component yarn (decoration yarn X ₁ +X ₂ ) alternately twist and kink to form braids or loops on the first component yarn (core yarn Y);

Further, when V _q1 (t):V _q2 (t):V _q3 (t)=(0.4-0.25):1:1, the second component yarn and the third component yarn are decoration yarns (decoration yarns X ₁ , X ₂ ), the first component yarn is the core yarn; the second component yarn and the third component yarn are low-twist yarns with a twist coefficient lower than 320, and the second component yarn is alternately twisted and kinked at the A first loop is formed on one component yarn, and a third component yarn is alternately twisted and kinked to form a second loop on the first component yarn, thereby forming a double loop fancy thread;

The linear density and twist of the second component yarn and the third component yarn (decoration line X ₁ , X ₂ ) are equal, and the second component yarn and the third component yarn are twisted and kinked on the first component yarn respectively. Symmetrical bouclé yarns; otherwise, the second and third component yarns are twisted and kinked respectively on the first component yarns to form asymmetrical bouclé yarns;

That is, the second component yarn and the third component yarn (decoration line X ₁ , X ₂ ) have different linear densities and the same twist, or the second component yarn and the third component yarn (decoration line X ₁ , X _{2 )} ) have the same linear density and different twists, or the second component yarn and the third component yarn (decoration line X ₁ , X ₂ ) have different linear densities and different twists, all of which form asymmetry on the first component yarn of double hoops.

Further, when V _q1 (t):V _q2 (t):V _q3 (t)=(0.4-0.25):1:1, the second component yarn and the third component yarn are decoration yarns (decoration yarn X ₁ , X ₂ ), the first component yarn (core yarn Y) is the core yarn; the second component yarn and the third component yarn are strongly twisted yarns with a twist coefficient higher than 480, and the second component yarn is alternately twisted and kink to form a first braid on the first component yarns, and the third component yarns are alternately twisted and kinked to form a second braid on the first component yarns, thereby forming a double braid fancy thread;

The density and twist of the second component yarn and the third component yarn are equal, forming a symmetrical double braid fancy line; the second component yarn and the third component yarn density or twist are not equal, forming an asymmetrical braid Double Braid Fancy Line.

Further, the fancy yarn pattern size control method includes:

① Control of the knot size of fancy yarn

When V _q1 (t):V _q2 (t):V _q3 (t)=(1.15～1.3):1:1, the first component yarn is decorative yarn, the second component yarn and the third component yarn It is the core yarn; the first component yarn (decoration yarn Y ₁ ) is alternately twisted and kinked to form knots on the second component yarn and the third component yarn as the core yarn (core yarn (X ₁ +X ₂ )); At this time, the linear density of the decorative yarn is:

Adjusting the speed V _h (t) of the rear roller by PLC can control the change of the linear density of the decorative yarn. When the feeding speed of the rear roller increases, the decorative yarn density increases. When the feeding speed of the rear roller decreases, the decorative yarn density increases. The linear density of the yarn is reduced. Thus, the online change of the size of the formed fancy yarn knots is regulated;

②Regulation of the size of the fancy yarn loop

When V _q1 (t):V _q2 (t):V _q3 (t)=(1.3～4):1:1, the first component yarn is decorative yarn, the second component yarn and the third component yarn It is the core yarn; the first component yarn (decoration yarn Y ₁ ) is alternately twisted and kinked to form loops on the second component yarn and the third component yarn as the core yarn (core yarn (X ₁ +X ₂ )) ; At this time, the linear density of the decorative yarn is:

Adjusting the speed V _h (t) of the rear roller by PLC can control the change of the linear density of the decorative yarn. When the feeding speed of the rear roller increases, the decorative yarn density increases. When the feeding speed of the rear roller decreases, the decorative yarn density increases. The linear density of the yarn is reduced;

Simultaneously, regulate and control the speed difference of the first front roller relative to the second front roller and the third front roller, and then regulate and control the excess of the decorative yarn speed V _q1 (t) relative to the core yarn V _q2 (t)=V _q3 (t) line speed Feeding amount, under the condition of knitting, if the decorative yarn is thick and the overfeeding amount is large, the loops will be large; if the decorative yarn is fine and the overfeeding amount is small, the loops will be small, so the size of the formed fancy yarn loops can be adjusted online;

③Regulation of thickness of fancy yarn braid

When V _q1 (t): V _q2 (t): V _q3 (t) = 1: (1.3～4): (1.3～4), the first component yarn is the core yarn, the second component yarn and the second component yarn The three-component yarn is decorative yarn; the second and third component yarns are strongly twisted yarns (twist coefficient not less than 480), and the second and third component yarns are immediately kinked under the action of their own twist stress forming a braid on the first component yarn;

Assuming that the linear densities of the second component yarn and the third component yarn as decorative yarns are ρ _x1 and ρ _x2 , at this time, the speed of the second component yarn and the third component yarn is adjusted V _q1 (t)=V _q2 (t) Relative to the overfeeding amount of the first component yarn speed V _q3 (t), if the overfeeding amount is large, the braids will be long, and if the overfeeding amount is small, the braids will be short, thereby controlling the online change of the length of the formed fancy yarn braids.

Further, the first component yarn, the second component yarn, the third component yarn and the fixed yarn are yarns of different colors, and the wrapping structure, covering ratio and/or The thread density realizes the online change of the color of the fancy yarn.

The structural parameters of the fancy yarn formed by the alternating draft twisting covering hollow spindle spinning system are explained below.

Let the linear density of the first component yarn (roving), the second component yarn (i.e. the core yarn 1) and the third component yarn density and the solid yarn density of the decorative yarn be ρ _s1 , ρ _x1 , ρ respectively _x2 , ρ _g , the linear density of the fancy yarn is ρ _hy after alternating drafting, alternating twisting and fixed yarn coating, and the three front roller speeds, rear roller speeds, and middle roller speeds in the spinning process are set speed, and the core wire delivery speeds of the first pull-out roller and the second pull-out roller are V _q1 (t), V _q2 (t), V _q3 (t), V _h (t), V _z (t), V _x1 (t), V _x2 (t), C=1.25 is the speed ratio of the middle and rear rollers in each channel. After the alternate drafting, alternate twisting and fixed yarn covering 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 fixed yarn:

ρ _g (t) = ρ _g (3)

4. Linear density and covering ratio of fancy yarn

Description of drawings

In order to more clearly illustrate the specific implementation of the present utility model or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the specific implementation or the prior art will be briefly introduced below. Obviously, the accompanying drawings in the following description The drawings show some implementations of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the schematic structural view of the hollow spindle fancy yarn forming device provided by the utility model embodiment 1;

Fig. 2 is the schematic diagram of the first to third channels of the hollow spindle fancy yarn forming device in embodiment 1;

Fig. 3 is a transmission structure diagram of the hollow spindle fancy yarn forming device provided by Embodiment 1 of the utility model;

Fig. 4 is the schematic circuit diagram of the hollow spindle fancy yarn forming device in Example 1 of the utility model;

Fig. 5 is a circuit connection diagram of the comparison module in the hollow spindle fancy yarn forming device in Example 3 of the present utility model.

Reference signs:

Y-first component yarn; X ₁ -second component yarn; X ₃ -third component yarn; G ₁ -fixed yarn; R ₁ -first take-off roller; R ₂ -second take-off roller; R ₃ -hollow spindle; D ₁ -first twisting point; D ₂ -second twisting point; 41-rear roller; 51-first bridge gear; 61-middle roller; 71-first front roller; 72-second front Roller; 73-third front roller; 4-rear roller shaft; 5-auxiliary shaft; 6-middle roller shaft; 7-front roller shaft; 8-second front shaft; 411-first driving gear; 611-first Passive gear; 82-second main gear; 721-second sub-gear; 83-third main gear; 731-third sub-gear; P ₄ -rear top roller; P ₆ -middle top roller; P ₇ -front top roller Roller; Q ₁ - upper apron; Q ₂ - lower apron.

Detailed ways

The technical solutions of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the utility model, but not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Example 1

As shown in Figures 1-3, a single drafting channel hollow spindle fancy yarn forming device provided in this embodiment includes: drafting channels ABC ₁ D ₁ D ₂ E for the passage of the first component yarn Y , the first auxiliary channel R ₁ C ₂ D ₁ D ₂ E for the passage of the second component yarn X ₁ and the fixed yarn channel R ₃ D ₂ E for the passage of the fixed yarn G ₁ .

The rear roller 41, the middle roller 61, the first front roller 71, the _first twisting point D1 and the _second twisting point D2 are sequentially arranged on the drafting channel; the second front roller 72, the second One twisting point D ₁ and the second twisting point D ₂ ; the area between the back roller 41 on the drafting channel, the middle roller 61 and the first front roller 71 is the drafting zone, the first front roller 71, the second front roller 72 And between the first twisting point, an alternately twisted triangular area is formed; the first front roller 71 and the second front roller 72 move independently respectively, and the corresponding component yarns are introduced into the alternately twisted triangular area; the first component yarn and the second One or both of the two component yarns are introduced into the intertwist triangle area and then twisted to form the main body of the fancy yarn. The _second twisting point D2 is provided with a hollow spindle _R3 , the main body of the fancy yarn passes through the hollow spindle _R3 , the hollow spindle _R3 rotates rapidly, and the fixed yarn on the hollow spindle _R3 meets and aligns with the main body of the fancy yarn The fancy yarn body is covered.

This embodiment also includes a filament bobbin (not shown), which is set on the hollow spindle and rotates synchronously with the hollow spindle, and the fixed yarn is wound on the filament bobbin. The hollow spindle includes a false twister (not shown) for twisting the fancy yarn body.

The utility model breaks through the technical bottleneck of hollow spindle spinning in the formation of fancy yarns, and realizes fancy yarns (including core yarns and decorative yarns) One-step spinning) and at the same time, it is realized by adjusting the output speed of decorative yarn and core yarn, adjusting the linear density and blending ratio of decorative yarn, adjusting the twist of core yarn, and adjusting the switching between core yarn and decorative yarn. The online change of the color and shape of fancy yarn slubs, belly, knots, loops, and braids expands new varieties of fancy yarns.

Wherein, the rear roller 41 and the middle roller 61 are connected through the first transmission gear set, and the first transmission gear set is used to keep the traction ratio between the middle roller 61 and the rear roller 41 constant and not greater than 1.4.

The first-level drafting unit is formed between the middle roller 61 and the rear roller 41 in the utility model, and the front roller and the middle roller 61 form a second-level drafting unit. The speed ratio of the middle and rear rollers 41 of the same channel is constant and less than 1.4, and Relative to the synchronous speed change of the front rollers in this passage, the middle and rear rollers 41 of different passages alternately change speed relative to the front rollers, so as to realize the alternate drafting of the first component yarn. Especially important, the primary drafting is pre-drawing, the primary drafting ratio e _h is a constant C is the constant drafting, and the primary drafting ratio e _h = C ≤ 1.4, which can ensure the continuity of the roving, No draft singularity occurs in the first draft zone. At the same time, the pre-drawing process can straighten, tension and orient the fibers inside the roving, so as to prepare for slippage during the main drafting process, reduce the breakage rate or singularity rate in the main drafting process, and make the drafting and twisting The process is more stable, greatly reducing the labor intensity of workers.

Wherein, the first front roller 71 and the second front roller 72 are coaxial, have the same radius, and are relatively rotatable in the circumferential direction.

In the above embodiment, more preferably, it also includes a second auxiliary channel R ₂ C ₃ D ₁ D ₂ E for the passage of the third component yarn X ₂ ; the second auxiliary channel is sequentially provided with a third front roller 73. The first twist point D ₁ and the second twist point D ₂ . In the circumferential direction, the third front roller 73 and the second front roller 72 are relatively fixedly arranged.

And on the first auxiliary channel, also include the first lead-out roller R ₁ (the first unwinding shaft), the first lead-out roller, the second front roller 72, the first twisting point and the second twisting point are arranged in sequence; It also includes the second lead-out roller R ₂ (second unwinding shaft), the second lead-out roller R ₂ , the third front roller 73 , the first twisting point and the second twisting point are arranged in sequence.

A rear top top roller P ₄ , a middle top top roller P ₆ , and a front top top roller P ₇ are respectively arranged on the rear roller, the middle roller and the front roller. _A middle upper top roller P6 is correspondingly arranged above the middle roller 61, and the yarn forming device also includes _an upper apron Q1 which is set on the middle upper top roller and the upper pin and keeps moving synchronously with the middle roller 61, and which is set on the middle roller 61 and the lower pin. The lower apron _Q2 on the pin and keeps moving synchronously with the middle roller 61; the distance between the gripping jaws of the upper apron and the lower apron is less than 3mm from the jaw line of the front roller.

Secondary drafting e _q is dynamic main drafting, and the speed of middle roller 61 changes relative to the front roller, when the blending ratio K=0% of the first component yarn in the drafting passage, the When the secondary drafting ratio e _q =∞, the channel yarn forms a drafting singularity in the second drafting zone, and the distance between the drafting singularity and the nip of the front roller is δ≤3mm (in the prior art, the rear The distance between the roller 41 and the middle roller 61 is generally greater than 25 mm, and the position of the draft singularity in the first draft zone is randomly distributed between the middle and rear rollers 41. When the distance between the draft singularity and the nip of the middle roller 61 exceeds 3 mm When the draft singularity is fed into the middle roller 61 nip again, there are uncertain factors. If the coordination is not good, it will either produce coarse details, or cause spinning breakage, making spinning an unstable process. Affect the reliability of spinning and yarn quality). When K gradually increases, with the synchronous start of the rear roller 41 and the middle roller 61, the strands held by the upper and lower aprons are instantly fed into the jaws of the front roller for secondary drafting. The draft singularity in the stretch zone does not affect the spinning stability.

Present embodiment also comprises back roller shaft 4, middle roller shaft 6, front roller shaft 7 and auxiliary shaft 5; On the circumferential direction of back roller shaft 4, back roller 41 (for example by the mode of bearing) can be rotatably looped on On the rear roller shaft 4; in the circumferential direction of the middle roller shaft 6, the middle roller 61 can be looped on the middle roller shaft 6 in a relatively rotatable manner; The bridge gear 51 and the first driven gear 611; the first driving gear is fixedly connected with the rear roller 41 coaxially, and the first driven gear is fixedly connected with the middle roller 61 coaxially; on axis 5. Thus, the rear roller 41 and the middle roller 61 can be synchronously driven to run by the auxiliary shaft 5, thereby adjusting the feeding (feeding) speed of the first component yarn.

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 relatively rotatably sleeved on the front roller shaft 7 .

The present embodiment also includes the second front axle 8, the second front axle 8 is connected with the second front roller 72 through the second gear transmission pair; the second front axle 8 is connected with the third front roller 73 through the third gear transmission pair; The second front axle 8 can synchronously drive the second front roller 72 and the third front roller 73 to rotate.

The second gear transmission pair includes: the second main gear 82 and the second sub-gear 721 for mutual meshing transmission, the second main gear is fixedly set on the second front axle 8, and the second sub-gear is coaxial with the second front roller 72 Fixed connection; the third gear transmission pair includes: the third main gear 83 and the third sub-gear 731 that are meshed with each other, the third main gear is fixedly set on the second front axle 8, the third sub-gear and the third front roller 73 Concentric fixed connection.

4, the present embodiment also includes a control system and a servo drive system; the servo drive system includes a servo driver and a servo motor; the control system includes a controller (preferably a PLC programmable controller) and a speed sensor. The controller is connected with the servo motor through the servo driver in turn.

The servomotors include: a first servomotor for driving the front roller shaft 7, a second servomotor for driving the second front axle 8, a third servomotor for driving the auxiliary shaft 5 to rotate, and a third servomotor for driving the first lead-out The fourth servo motor that the roller rotates, the fifth servo motor that is used to drive the rotation of the first pull-out roller, and the hollow ingot motor that is used to drive the hollow spindle to rotate.

The rotational speed sensor includes: the first sensor, the second sensor, the third sensor, the fourth sensor and the fifth sensor, and the hollow spindle sensor for monitoring the rotational speed of the hollow spindle.

The controller in the utility model controls the feeding speed of the four component yarns on the four yarn channels through the servo driver and the servo motor in turn, and the speed sensor monitors the actual feeding speed of the four component yarns in real time, and will monitor The values are fed back to the controller, and the controller can adjust the magnitude of the control signals on the four yarn channels according to the monitored values. The twisting mechanism includes a ring plate, and the controller controls the movement of the ring plate 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 hollow spindle fancy yarn forming device using the above-mentioned single drafting channel. By constructing a hollow spindle spinning system with two spinning channels and two twisting points, at the first twisting point (the first at the twisting point) to complete the intertwisting and form the fancy yarn main body, and at the second twisting point (the second twisting point), the output fixed yarn and the formed fancy yarn main body are covered and twisted to form a decorative yarn, Fancy yarns of core yarn and fixed yarn, realize the spinning of decorative thread, core thread and fixed thread one-step hollow spindle fancy yarn.

In addition, by adjusting the synergistic changes in the speed of the rear roller, middle roller and three front rollers, the fancy yarn with multiple structures such as single-twist covering, cross-twisting covering and twisting covering can be spun; The speed of the middle roller and the three front rollers can be changed synergistically, the combination of decoration yarn and core yarn can be changed online, the combination of knots, braids, circles and other patterns can be changed online, the size of knots, braids, circles and other patterns can be changed online Change the color of patterns such as knots, braids, and circles, and spin combined fancy yarns with variable appearance; finally, control the core thread and decorative thread by adjusting the speed of the rear roller, middle roller and three front rollers. And the covering ratio of the fixed thread, the production efficiency is greatly improved by spinning the colored fancy yarn whose color changes on-line.

Example 2

This embodiment also discloses a fancy yarn forming method using the above-mentioned hollow spindle fancy yarn forming device with single drafting channel.

1. Spinning of decorative thread, core thread, and solid thread twisted into hollow spindle fancy yarn in one step

The hollow spindle spinning device of the utility model is composed of one channel for drafting roving, two channels for core yarn of spun yarn (or filament) and one channel for covering yarn. After the roving is alternately drawn, it becomes untwisted strands with varying thickness, which are output from the drafting channel, and meet the yarn (or filament) output from the other two core yarn channels at the first twisting point. The three strands are twisted alternately and form the main body of the fancy yarn; due to the twisting effect of the hollow spindle, the fixed yarn (or filament) and the main body of the formed fancy yarn are covered and twisted at the second twisting point, thus Form fancy yarns including decorative yarns, core yarns and fixed yarns, and realize the spinning of decorative yarns, core yarns and fixed yarns in one-step hollow spindle fancy yarns.

2. Spinning of fancy yarn with winding structure changing online

By adjusting the speeds of the back roller, middle roller and three front rollers online, the decorative yarn and core yarn can be inputted together to spin single-twisted covered structure fancy yarn, cross-twisted covered structure fancy yarn and twist-wrapped overlay structure fancy yarn;

An untwisted sliver or yarn is twisted at the first twisting point through the drafting channel, the first auxiliary channel or the second auxiliary channel, and is covered by the fixed yarn at the second twisting point Form single-twisted covering structure fancy yarn;

Two untwisted strands or yarns are respectively introduced into the intertwisting triangular area through two passages in the drafting passage, the first auxiliary passage or the second auxiliary passage, and are After the first twisting point is twisted at a non-constant speed, it is covered by fixed yarn at the second twisting point to form a cross-twisted covered structure fancy yarn;

Three untwisted strands or yarns are respectively introduced into the intertwined triangular area through the drafting channel, the first auxiliary channel and the second auxiliary channel, and are non-equally twisted at the first twisting point. After fast twisting, it is covered by fixed yarn at the second twisting point to form twisted and covered structure fancy yarn.

⑴ Spinning of fancy yarn with cross-twisted covering structure:

The so-called cross-twist covering structure of fancy yarn refers to the fancy yarn structure formed by two untwisted strands (or yarns) being twisted at the same speed at the first twisting point and covered by fixed yarn at the second twisting point.

In the device of the present utility model, the drafting passage (main passage), the first auxiliary passage and the second auxiliary passage respectively correspond to the first front roller, the second front roller and the third front roller, because the roving _Y1 alternately draws through the main passage After stretching, the yarn X1 is output by the first front roller, the yarn X1 is output by the _second front roller through the _first auxiliary channel, and the yarn X2 is output by the third front roller through the second auxiliary channel. The sliver output by roving Y ₁ under the condition of alternating drafting is intermittent. When the linear density of the output sliver of the main channel is zero, the two front rollers corresponding to the two auxiliary channels output the two slivers at a constant speed. Twisting is carried out at the first twisting point, and at the second twisting point, it is covered by the fixed yarn _G1 output from the fixed yarn channel to form a cross-twisted and covered fancy yarn structure. For example, in this way, it is possible to form a fancy yarn having a cross-twist covering structure of [(X ₁ +X ₂ )+G ₁ ].

⑵Spinning of fancy yarn with twisted and covered structure:

The so-called twisted and covered structure of fancy yarn refers to the fancy yarn formed by non-equal-speed twisting of more than three untwisted strands (or yarns) at the first twisting point and covered by fixed yarn at the second twisting point. structure.

In the device of the utility model, the drafting passage, the first auxiliary passage, and the second auxiliary passage correspond to the first front roller, the second front roller and the third front roller. Roller output, yarn X ₁ , X ₂ are exported at constant speed through the second front roller and the third front roller corresponding to the first auxiliary passage and the second auxiliary passage, at the first twisting point two yarns (or silk) ( X ₁ +X ₂ ) and a non-twisted sliver (roving Y) are twisted at a non-constant speed to form a twisted structure, and at the second twisting point, it is wrapped by the solid line G output from the fixed yarn channel to form a twisted wrapped Fancy yarn construction. In this manner, a fancy yarn of [Y ₁ +(X ₁ +X ₂ )+G ₁ ] twisted covering structure can be formed.

3. Spinning of fancy yarns whose shape changes online

Assuming that the speeds of the first front roller, the second front roller and the third front roller are V _q1 , V _q2 and V _q3 respectively, by online regulation of V _q1 , V _q2 and/or V _q3 ; by online regulation of the rear roller, The speed of the middle roller and the three front rollers can realize the online change of the combination mode of decorative yarn and core yarn, the online change of the combination mode of knots, braids, circles, etc., and the online change of the size of knots, braids, circles, etc. Change, online change of color and color of knots, braids, circles and other patterns, spinning combined fancy yarns with changeable appearance and shape.

⑴ Spinning of fancy yarns in which the combination mode of decorative yarn and core yarn changes online

The first component yarn, the second component yarn and the third component yarn are respectively introduced into the intertwined triangular area by the first front roller, the second front roller and the third front roller, wherein the component with the lowest front roller speed The yarn (shaft) is the core yarn of the fancy yarn, and the component yarn with a higher speed of the front roller is the decorative yarn of the fancy yarn. By adjusting the speed of the first front roller, the second front roller and the third front roller online, Realize online change of combination mode of decoration yarn and core yarn in fancy yarn.

Wherein, the first component yarn (roving Y) is output by the first front roller with V _q1 (t) after alternate drafting through the drafting channel, the second component yarn and the third component yarn (yarn X ₁ , X ₂ ) is output by the second front roller and the third front roller at the speed of V _q2 (t)=V _q3 (t).

Generally, the sliver with the lowest speed will become the core yarn of the fancy yarn, and the sliver with a relatively high speed will become the decorative yarn of the fancy yarn. When V _q2 (t) = V _q3 (t) ≤ V _q1 (t) minimum, X ₁ and X ₂ are core yarns, Y is decorative yarn; when V _q3 (t) = V _q2 (t) ≥ V _q1 In (t), Y is the core yarn, and X ₁ and X ₂ are decorative yarns. Therefore, the on-line change of the combination mode of decorative yarn and core yarn can be realized by controlling V _q1 (t), V _q2 (t), and V _q3 (t) by PLC.

⑵Spinning of fancy yarns with combinations of patterns such as knots, braids, and circles that change online

① When V _q1 (t): V _q2 (t): V _q3 (t) = (1.15-1.3): 1:1, the first component yarn (decorative yarn Y) is alternately twisted and kinked in the second group Part yarn and third component yarn (core yarn X ₁ +X ₂ ) form knots;

②When V _q1 (t):V _q2 (t):V _q3 (t)=(1.4-4):1:1, the first component yarn (decorative yarn Y) is intertwined and kinked in the second group Part yarn and the third component yarn (core yarn X ₁ +X ₂ ) form loops;

③ When V _q1 (t): V _q2 (t): V _q3 (t) = (0.90-0.75): 1:1, the second component yarn and the third component yarn (decoration yarn X ₁ +X ₂ ) intertwist and kink to form knots on the first component yarn (core yarn Y);

④ When V _q1 (t): V _q2 (t): V _q3 (t) = (0.60-0.25): 1:1, the second component yarn and the third component yarn (decoration yarn X ₁ +X ₂ ) alternately twist and kink to form braids or loops on the first component yarn (core yarn Y);

⑶Spinning of double circle fancy yarn

When V _q1 (t):V _q2 (t):V _q3 (t)=(0.4-0.25):1:1, the second component yarn and the third component yarn are decorative yarns (decorative yarn X ₁ , X ₂ ), the first component yarn is the core yarn; the second component yarn and the third component yarn are low-twist yarns with a twist coefficient lower than 320, and the second component yarn is alternately twisted and kinked in the first component yarn The first circle is formed on the yarn, and the third component yarn is alternately twisted and kinked to form the second circle on the first component yarn, thereby forming a double circle fancy thread;

The linear density and twist of the second component yarn and the third component yarn (decoration line X ₁ , X ₂ ) are equal, and the second component yarn and the third component yarn are twisted and kinked on the first component yarn respectively. Symmetrical bouclé yarns; otherwise, the second and third component yarns are twisted and kinked respectively on the first component yarns to form asymmetrical bouclé yarns;

That is, the second component yarn and the third component yarn (decoration line X ₁ , X ₂ ) have different linear densities and the same twist, or the second component yarn and the third component yarn (decoration line X ₁ , X _{2 )} ) have the same linear density and different twists, or the second component yarn and the third component yarn (decoration line X ₁ , X ₂ ) have different linear densities and different twists, all of which form asymmetry on the first component yarn of double hoops.

⑷ Spinning of double braid fancy yarn

When V _q1 (t): V _q2 (t): V _q3 (t) = (0.4-0.25): 1:1, the second component yarn and the third component yarn are decorative yarns (decorative yarns X ₁ , X ₂ ), the first component yarn (core yarn Y) is the core yarn; the second component yarn and the third component yarn are strongly twisted yarns with a twist coefficient higher than 480, and the second component yarn is alternately twisted and kinked at A first braid is formed on the first component yarn, and a third component yarn is alternately twisted and kinked to form a second braid on the first component yarn, thereby forming a double braid fancy thread;

The density and twist of the second component yarn and the third component yarn are equal, forming a symmetrical double braid fancy line; the second component yarn and the third component yarn density or twist are not equal, forming an asymmetrical braid Double braid fancy line.

If the thread densities and twists of the decorative threads X ₁ and X ₂ are equal, a symmetrical double braided fancy thread will be formed; if the thread densities of the decorative threads X ₁ and X ₂ are unequal and the twists are equal, or the thread densities of the decorative threads X ₁ and X ₂ are equal Equal, unequal twists, or unequal thread densities and twists of decorative threads X ₁ and X ₂ will form asymmetrical double-braided fancy threads;

⑸ Spinning of fancy yarns whose pattern size changes online such as knots, braids, and circles

The size of fancy yarn knots, braids, loops and other patterns depends on the thickness and twist of the decorative yarn and core yarn, as well as the overfeed speed of the decorative yarn relative to the core yarn. When forming knots, fancy yarns with a large coarse twist of decorative yarns and fancy yarns with small fine twists will form larger knots than fancy yarns with small twists; Fancy yarn with small fine twist and small feeding ratio of decorative yarn has larger loops than kink forming; when braids are formed, fancy yarn with large coarse twist of decorative yarn and large overfeed ratio and fancy yarn with small fine twist and small feeding ratio The yarn is longer than the twist-formed braid.

① Control of the knot size of fancy yarn

When V _q1 (t):V _q2 (t):V _q3 (t)=(1.15～1.3):1:1, the first component yarn is decorative yarn, the second component yarn and the third component yarn It is the core yarn; the first component yarn (decoration yarn Y ₁ ) is alternately twisted and kinked to form knots on the second component yarn and the third component yarn as the core yarn (core yarn (X ₁ +X ₂ )); At this time, the linear density of the decorative yarn is:

Adjusting the speed V _h (t) of the rear roller by PLC can control the change of the linear density of the decorative yarn. When the feeding speed of the rear roller increases, the decorative yarn density increases. When the feeding speed of the rear roller decreases, the decorative yarn density increases. The linear density of the yarn is reduced. Thus, the online change of the size of the formed fancy yarn knots is regulated;

②Regulation of the size of the fancy yarn loop

When V _q1 (t):V _q2 (t):V _q3 (t)=(1.3～4):1:1, the first component yarn is decorative yarn, the second component yarn and the third component yarn It is the core yarn; the first component yarn (decoration yarn Y ₁ ) is alternately twisted and kinked to form loops on the second component yarn and the third component yarn as the core yarn (core yarn (X ₁ +X ₂ )) ; At this time, the linear density of the decorative yarn is:

Adjusting the speed V _h (t) of the rear roller by PLC can control the change of the linear density of the decorative yarn. When the feeding speed of the rear roller increases, the decorative yarn density increases. When the feeding speed of the rear roller decreases, the decorative yarn density increases. The linear density of the yarn is reduced;

Simultaneously, regulate and control the speed difference of the first front roller relative to the second front roller and the third front roller, and then regulate and control the excess of the decorative yarn speed V _q1 (t) relative to the core yarn V _q2 (t)=V _q3 (t) line speed Feeding amount, under the condition of knitting, if the decorative yarn is thick and the overfeeding amount is large, the loops will be large; if the decorative yarn is fine and the overfeeding amount is small, the loops will be small, so the size of the formed fancy yarn loops can be adjusted online;

③Regulation of thickness of fancy yarn braid

When V _q1 (t): V _q2 (t): V _q2 (t) = 1: (1.3 ~ 4): (1.3 ~ 4), the first component yarn is the core yarn, the second component yarn and the second component yarn The three-component yarn is decorative yarn; the second and third component yarns are strongly twisted yarns (twist coefficient not less than 480), and the second and third component yarns are immediately kinked under the action of their own twist stress forming a braid on the first component yarn;

Assuming that the linear densities of the second component yarn and the third component yarn as decorative yarns are ρ _x1 and ρ _x2 , at this time, the speed of the second component yarn and the third component yarn is adjusted V _q1 (t)=V _q2 (t) Relative to the overfeeding amount of the first component yarn speed V _q3 (t), if the overfeeding amount is large, the braids will be long, and if the overfeeding amount is small, the braids will be short, thereby controlling the online change of the length of the formed fancy yarn braids.

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

The first component yarn, the second component yarn, the third component yarn and the fixed yarn are yarns of different colors, and the fancy yarn can be realized by adjusting the wrapping structure, covering ratio and/or linear density of the fancy yarn online Online variation of yarn color.

Fancy yarn is formed by wrapping core yarn, decorative yarn and fixed yarn. When the wrapping structure and covering ratio change online, the color of fancy yarn will change online. According to formula (6)(7)(8)(9)(10), if the four yarn slivers ρ _s1 , ρ _x1 , ρ _x2 , ρ _g fed in the two twisting processes are red, yellow, For blue, black and other colors, the color of fancy yarn can be adjusted by changing the covering ratio. Suppose the linear density of the fancy yarn is ρ _hy (t), and the covering ratios of the fancy yarn are K _h1 (t), K _h2 (t), K _h3 (t), and K _h4 (t). but

Then control the servo motor and drive V _h (t), V _q1 (t), V _q2 (t), V _q3 (t), V _x1 (t), V _x2 (t) through PLC to control the fancy yarn Online variation of density and cladding ratio.

Example 3

The structure of this embodiment is basically the same as that of Embodiment 1, the difference is that:

As shown in Figure 5, the control system also includes a first comparison module, the first comparison module is respectively connected with the third sensor, the fourth sensor, the fifth sensor and the controller, the first comparison module is used to monitor the auxiliary shaft, the first lead-out The speed ratio between the roller and the second take-off roller, the controller adjusts the auxiliary shaft, the first take-off roller and the second take-off roller speed according to the value fed back by the first comparison module, and then regulates the first component yarn, the second component yarn and the The blending ratio of the third component yarn.

In order to realize the adjustment of the yarn blending ratio accurately and quickly, the utility model directly adjusts and controls according to the value fed back by the first comparison module, even if the rotation speeds of the auxiliary shaft, the first lead-out roller and the second lead-out roller exceed the set value respectively due to various error reasons. As long as the speed ratio fed back by the first comparison module is within the set error range, the production can continue without additional adjustment of the actual speeds of the middle roller shaft 6 and the rear roller shaft 4. Compared with the prior art, which needs to monitor multiple parameters at the same time, the utility model only needs to monitor one parameter, which relaxes the adjustment accuracy of the rotation speed of the auxiliary shaft, the first lead-out roller and the second lead-out roller, and increases the redundancy of the system control , while highlighting the importance of the ratio of roller speeds on different channels, the workload of the controller is greatly reduced while the control accuracy of the blending ratio of the yarn is greatly improved. In addition, the downtime or adjustment time in the production process is avoided. The equipment The production efficiency is increased by more than 30%.

The comparison module may be the prior art, an existing comparator or an integrated comparison circuit, or a comparison module in the form of software in the controller CUP. There are also many types of sensors, such as photoelectric encoders or Hall speed sensors.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand : It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the various embodiments of the present invention Scope of technical solutions.

Claims (9)

1. single drafting channel hollow spindle fancy yarn shaping device, it is characterized in that, comprises: the drafting channel that is used for the first component yarn to pass through, the first auxiliary channel that is used for the second component yarn to pass through; A rear roller, a middle roller, a first front roller, a first twisting point and a second twisting point are successively arranged on the drafting channel; a second front roller, the first twisting point and the second twisting point are successively arranged on the first auxiliary passage. said second twist point; The area between the rear roller, the middle roller and the first front roller on the drafting channel is the drafting area, and an alternate twisting triangle is formed between the first front roller, the second front roller and the first twisting point; the first front roller and the second front roller move independently, and respectively introduce the corresponding component yarns into the intertwisting triangular area; one or both of the first component yarn and the second component yarn are led to the intertwisting triangular area After being twisted and twisted in the zone, the main body of the fancy yarn is formed; The second twisting point is provided with a hollow spindle, the fancy yarn main body passes through the hollow spindle, the hollow spindle rotates rapidly, and the fixed yarn on the hollow spindle meets the fancy yarn main body and touches the fancy yarn main body. To wrap. 2. The hollow spindle fancy yarn forming device according to claim 1, characterized in that, the rear roller and the middle roller are connected through a first transmission gear set, and the first transmission gear set is used to maintain the middle roller. The traction ratio between the roller and the rear roller is constant and not greater than 1.4. 3. The hollow spindle fancy yarn forming device according to claim 1, further comprising a third component yarn and a second auxiliary passage for the third component yarn to pass through; the second auxiliary channel The third front roller, the first twisting point and the second twisting point are sequentially arranged on the channel; one or both of the first component yarn, the second component yarn and the third component yarn are drawn The main body of the fancy yarn is formed after being twisted in the intertwined triangular area. 4. The hollow spindle fancy yarn forming device according to claim 3, characterized in that, in the circumferential direction, the third front roller and the second front roller are relatively fixedly arranged. 5. The hollow spindle fancy yarn forming device according to claim 3, characterized in that, the first auxiliary channel also includes a first take-out roller, the first take-off roller, the second front roller, the The first twisting point and the second twisting point are arranged in sequence; And/or, the second auxiliary channel further includes a second take-off roller, the second take-off roller, the third front roller, the first twisting point and the second twisting point are arranged in sequence. 6. The hollow spindle fancy yarn forming device according to 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 is rotatably looped on the rear roller shaft; In the circumferential direction of the middle roller shaft, the middle roller is rotatably looped on the middle roller shaft; The first transmission gear set includes the first driving gear, the first bridge gear and the first driven gear which are sequentially meshed and driven; the first driving gear is fixedly connected to the rear roller coaxially, and the first driven gear is connected to The middle roller is fixedly connected to the shaft; The first bridge gear is relatively fixedly sleeved on the auxiliary shaft. 7. The hollow spindle fancy yarn forming device according to claim 4, further comprising a front roller shaft; In the circumferential direction of the front roller shaft, the first front roller is relatively fixedly sleeved on the front roller shaft; the second front roller and the third front roller are relatively rotatably sleeved on the front roller shaft superior. 8. The hollow spindle fancy yarn forming device according to claim 7, further comprising a second front axle, which is connected with the second front roller through a second gear transmission pair; The front axle is connected with the third front roller through the third gear transmission pair; the second front roller and the third front roller can be synchronously driven to rotate through the second front axle. 9. The hollow spindle fancy yarn forming device according to claim 8, characterized in that, the second gear transmission pair comprises: a second main gear and a second auxiliary gear that are meshed with each other, and the second main gear is fixed Sleeved on the second front axle, the second pinion is fixedly connected with the second front roller coaxially; The third gear transmission pair includes: a third main gear and a third auxiliary gear that are meshed with each other, the third main gear is fixedly sleeved on the second front axle, and the third auxiliary gear is the same as the third front roller. Shaft fixed connection.