CN110528133A - A kind of preparation method and device of looping structure elastic ring circle composite yarn - Google Patents

Abstract

The invention discloses a method and a device for preparing a composite yarn with an elastic loop wrapping structure, and relates to the field of composite yarn processing. In the present invention, the elastic yarn and the non-elastic yarn in the drafting state are combined to form an elastic/non-elastic double-core yarn, and the wrapping yarn is wrapped to form a wrapping structure composite yarn, and finally the wrapping structure is removed to form a composite yarn. The drafting force on the elastic yarn in the yarn makes the elastic yarn in the wrapped structure composite yarn elastically retract to the undrawn state, and the non-elastic yarn in the direction of the yarn axis due to the elastic retraction of the elastic yarn Compressing and bending, and then protruding between the helical threads of the wrapping yarn to form loops, to prepare the composite yarn with wrapping structure elastic loops. The elastic loop composite yarn with wrapping structure prepared by the present invention is wound and stored in the form of wrapping structure composite yarn before the yarn loop is formed, and is unwound to form a loop during use, which can ensure that the loop composite yarn can be stored for a long time The quality of the loops after conveying will not be affected, which is beneficial to the subsequent application of loop composite yarns.

Description

Preparation method and device of a kind of wrapping structure elastic loop composite yarn

technical field

The invention relates to the field of composite yarn processing, in particular to a method and a device for preparing a composite yarn with elastic loops in a wrapping structure.

Background technique

Hollow spindle wrap spinning is a technology specialized in the production of wrapped structural composite yarns, the core of which is hollow spindle wrapping technology, that is, one yarn is helically wound to another yarn and/or sliver On, a composite yarn with an entangled structure is formed. At present, the hollow spindle wrapping technology is used in spinning equipment such as parallel spinning machines, hollow spindle fancy twisters, and hollow spindle wrapping machines.

Loop yarn is generally used to weave knitted sweaters. The yarn loops are distributed on the surface of the sweater, which can greatly improve the softness and warmth of the sweater. It is currently a main fancy yarn used for sweater knitting. The existing loop yarn is mainly spun by a hollow spindle fancy twister. The yarn loop is formed by overfeeding the fiber strands drafted by the drafting device, and the fixed yarn is fixed on the core yarn to form a composite yarn, and then prepared Get boucle yarn.

In the process of realizing the present invention, the inventors have found that the related technologies have at least the following problems:

In the existing method for preparing loop yarn, the formation of loops in loop yarn is realized by overfeeding, and the loops are mainly composed of short fiber strands rather than complete yarns, and the structure of the loops is unstable and easily destroyed. During the subsequent winding, transportation and storage of the obtained loop yarn, each loop is easily deformed, entangled, or even broken due to extrusion, thereby affecting the subsequent use of the loop yarn.

Contents of the invention

Aiming at the above-mentioned problems in the related art, the present invention provides a method and device for preparing elastic loop composite yarn with wrapping structure. The elastic/non-elastic yarn is formed by merging the elastic yarn and the non-elastic yarn in the drafting state. Elastic double-core yarn, and use the outer wrapping yarn to wrap to form a wrapped structure composite yarn, and finally recede the drafting force on the elastic yarn in the wrapped structure composite yarn, so that the elastic force in the wrapped structure composite yarn The yarn is elastically retracted to the undrawn state, and the non-elastic yarn is compressed and bent in the direction of the yarn axis due to the elastic retraction of the elastic yarn, and then the helical convexity of the wrapped yarn in the wrapped structure composite yarn The yarn loops are formed together, and the elastic loop composite yarn with wrapping structure is prepared.

According to a first aspect of an embodiment of the present invention, there is provided a method for preparing a composite yarn with wrapped elastic loops, the method comprising:

Continuously applying a draft force of a preset draft multiple to the elastic yarn, so that the elastic yarn is in a draft state;

combining a non-elastic yarn with said elastic yarn under draft to form an elastic/non-elastic dual core yarn;

Wrapping the outer wrapping yarn on the surface of the elastic/non-elastic double-core yarn in a spiral shape to form a wrapped structure composite yarn;

receding the drafting force on the elastic yarn in the wrapping structure composite yarn, so that the elastic yarn in the wrapping structure composite yarn elastically retracts to an undrawn state, and the wrapping The non-elastic yarn in the structural composite yarn is compressed and bent in the direction of the yarn axis due to the elastic retraction of the elastic yarn, and then the helical inter-convexity of the wrapped yarn in the wrapped structural composite yarn The yarn loops are formed together, and the elastic loop composite yarn with wrapping structure is prepared.

In a preferred embodiment, the pitch of each helix of the wrapping yarn in the wrapping structure composite yarn varies according to a preset rule.

In a preferred embodiment, the continuous application of a draft force of a preset draft multiple to the elastic yarn, so that the elastic yarn is in a draft state, includes:

The elastic yarn is unwound from the first core bobbin through the friction transmission of the feeding roller and then bypasses the guide roller, and the feed roller and the guide roller are driven by a chain transmission system, and the guide roller The surface linear velocity is greater than the surface linear velocity of the feed roller, thereby applying a draft force of a preset draft multiple to the elastic yarn between the guide roller and the feed roller, so that the The elastic yarn is in a draft state.

In a preferred embodiment, said combining non-elastic yarns with said elastic yarns in a draft state to form elastic/non-elastic double-core yarns includes:

At least one non-elastic yarn is unwound from the second core yarn bobbin and passed through the yarn guide hook by means of negative feeding, and fed into the central tube of the hollow spindle from the lower end after tension is applied by the spring tensioner;

After the elastic yarn in the drafting state is passed around the guide roller, it is fed into the central tube of the hollow spindle from the lower end, so that the non-elastic yarn and the elastic yarn in the drafting state combined at said central tube to form an elastic/non-elastic dual core yarn;

After the elastic/non-elastic double-core yarn passes through the central tube, it is sent into the converging yarn guide hook under the guidance of the yarn delivery roller.

In a preferred embodiment, the wrapping yarn is helically wrapped on the surface of the elastic/non-elastic double-core yarn to form a wrapped structure composite yarn, including:

Start the power supply of the hollow ingot, so that the hollow ingot rotates at high speed;

The wrapping yarn wound on the aluminum spindle tube is unwound with the rotation of the hollow spindle, meets the elastic/non-elastic double-core yarn at the meeting guide hook, and wraps in a spiral shape. Wrapped on the surface of the elastic/non-elastic dual-core yarn to form a wrapped structure composite yarn;

After the composite yarn with wrapping structure is drawn out by the yarn-drawing roller, it goes around the yarn-guiding rod, is guided by the yarn-guiding ceramic eye on the traversing yarn guide, and is wound to the bobbin driven by the friction of the winding roller, wherein , the ratio of the surface linear velocity of the winding roller to the surface linear velocity of the drawing roller is 0.5-0.7.

In a preferred embodiment, the elastic yarn includes transparent spandex monofilament, the linear density of the elastic yarn is 70D~250D, the draft ratio of the elastic yarn is 2.5~5 times, and the outsourcing The wrapping twist of the wrapping yarn is 400-600 twists/meter.

In a preferred embodiment, the number of said non-elastic yarns is at least two, and the color of each non-elastic yarn is different; the color of said non-elastic yarn is different from the color of said wrapping yarn.

According to the second aspect of the embodiment of the present invention, there is provided a device for preparing elastic loop composite yarn with wrapped structure, the device includes a first yarn drawing module, a second yarn drawing module, a combining and wrapping module and a yarn forming winding module;

Wherein, the first yarn drawing module includes a first core yarn bobbin, elastic yarn is wound on the first core yarn bobbin, and the first core yarn bobbin is frictionally connected with a feeding roller. A guide roller is provided on one side of the core yarn drum in the direction of rotation, and the feeding roller and the guide roller are used to apply a draft force of a preset draft multiple to the elastic yarn, so that the elastic yarn is in the drawing state;

The second yarn introduction module includes a second core yarn drum, on which a non-elastic yarn is wound, and a yarn guide hook is arranged above the centerline of the second core yarn drum, and the yarn guide One side of the hook is provided with a spring tensioner for applying tension to the non-elastic yarn;

The merging and wrapping module is arranged above the first yarn drawing module and the second yarn drawing module, and the merging and wrapping module includes a hollow ingot, and an aluminum ingot tube is provided on the hollow ingot. The outer wrapping yarn is wound on the aluminum ingot tube, and a converging yarn guide hook is arranged above the central tube of the hollow ingot, and the converging yarn guide hook is used to guide the elastic yarn drawn out by the first yarn drawing module and the The non-elastic yarns drawn by the second yarn-drawing module are combined to form elastic/non-elastic double-core yarns;

A yarn forming and winding module is arranged above the combined and wrapping module, and the yarn forming and winding module includes a yarn drawing roller, a yarn guide rod, a traverse guide, a winding roller and a bobbin sequentially from bottom to top. The winding roller is frictionally connected with the bobbin tube.

In a preferred embodiment, the surface linear velocity of the guide roller in the first yarn drawing module is greater than the surface linear velocity of the feeding roller.

In a preferred embodiment, the ratio of the surface linear velocity of the winding roller in the yarn forming winding module to the surface linear velocity of the yarn delivery roller is 0.5-0.7.

Compared with the prior art, the present invention provides a kind of elastic loop composite yarn for preparing wrapped structure and its processing method has the following advantages:

The present invention provides a method and device for preparing elastic loop composite yarn with wrapping structure. The elastic yarn and the non-elastic yarn in the drafting state are combined to form an elastic/non-elastic double-core yarn, and an outsourcing Wrapped yarn wraps to form wrapped structure composite yarn, and finally recedes the drafting force on the elastic yarn in the wrapped structure composite yarn, so that the elastic yarn in the wrapped structure composite yarn elastically retracts to an undrawn state , the non-elastic yarn is compressed and bent in the direction of the yarn axis due to the elastic retraction of the elastic yarn, and then protrudes between the spirals of the wrapped yarn in the wrapped structure composite yarn to form a loop, and the wrapped structure is prepared Elastic loop composite yarn. The wrapped structure elastic loop composite yarn prepared by the present invention is wound and stored in the form of wrapped structure composite yarn before the yarn loop is formed, and is unwound to form a yarn loop during use, thereby ensuring the loop composite yarn in the long run The quality of the loops will not be affected after time storage and delivery, which is beneficial to the subsequent application of loop composite yarns.

Further, the present invention designs various process parameters in the preparation process, such as the elastic yarn linear density, the wrapping twist of the outer wrapping yarn, the drafting ratio of the elastic yarn, and the winding draft of the wrapped structure composite yarn. The numerical range of the elongation multiple, etc., are all obtained by the inventor through a large number of creative experiments, research and tests, so as to ensure that the final prepared elastic loop composite yarn with wrapped structure has good loop shape and good elastic performance, ensuring The shape of the yarn loop is not easy to be damaged during storage, transportation and subsequent use.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

Fig. 1 is a schematic diagram of a method for preparing an elastic loop composite yarn with wrapping structure according to an exemplary embodiment.

Fig. 2 is a schematic diagram showing the formation of loops in an elastic loop composite yarn with wrapping structure according to an exemplary embodiment.

Fig. 3 is a schematic diagram of a device for preparing elastic loop composite yarn with wrapping structure according to an exemplary embodiment.

Fig. 4 is a product schematic diagram of an elastic loop composite yarn with wrapping structure provided in Example 1 of the present invention.

Fig. 5 is a product schematic diagram of an elastic loop composite yarn with wrapping structure provided by Example 2 of the present invention.

Fig. 6 is a product schematic diagram of an elastic loop composite yarn with wrapping structure provided by Example 3 of the present invention.

Fig. 7 is a product schematic diagram of an elastic loop composite yarn with wrapping structure provided by Example 4 of the present invention.

Fig. 8 is a product schematic diagram of an elastic loop composite yarn with wrapping structure provided in Example 5 of the present invention.

Fig. 9 is a product schematic diagram of an elastic loop composite yarn with wrapping structure provided by Example 6 of the present invention.

Fig. 10 is a product schematic diagram of an elastic loop composite yarn with wrapping structure provided by Example 7 of the present invention.

Fig. 11 is a product schematic diagram of an elastic loop composite yarn with wrapping structure provided in Example 8 of the present invention.

Fig. 12 is a product schematic diagram of an elastic loop composite yarn with wrapping structure provided by Example 9 of the present invention.

Detailed ways

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

Fig. 1 is a method schematic diagram of a method for preparing an elastic loop composite yarn with a wrapping structure shown according to an exemplary embodiment. As shown in Fig. 1, the preparation method for the elastic loop composite yarn with a wrapping structure includes:

Step 100: Continuously applying a drafting force of a preset drafting multiple to the elastic yarn, so that the elastic yarn is in a draft state.

In a preferred embodiment, the implementation step of step 100 may include: unwinding the elastic yarn from the first core bobbin through the friction drive action of the feeding roller and then passing around the guide roller, the feeding roller and the The guide rollers are driven by a chain drive system, and the surface linear velocity of the guide rollers is greater than that of the feeding rollers, so that the elastic force between the guide rollers and the feeding rollers A draft force of a preset draft multiple is applied to the yarn, so that the elastic yarn is in a draft state.

In a possible implementation manner, the elastic yarn includes transparent spandex monofilament, the linear density of the elastic yarn is 70D~250D, and the draft ratio of the elastic yarn is 2.5~5 times, the The wrapping twist of the wrapping yarn is 400-600 twists/m.

It should be noted that in the present invention, the draft force of the preset draft multiple is applied to the elastic yarn between the guide roller and the feeding roller, which can be achieved by matching the surface linear speed of the guide roller and the feeding roller. The adjustment is realized. Under the condition of other parameters being the same, the larger the stretching ratio of the elastic yarn is, the larger the size of the loop formed by the elastic loop composite yarn with the wrapped structure is finally prepared, and the corresponding loop layer formed on the surface of the fabric will be larger. thicker.

Step 200: Combining the non-elastic yarn with the elastic yarn in a draft state to form an elastic/non-elastic dual-core yarn.

The non-elastic yarns can be filament yarns or spun yarns such as polylactic acid yarns, pure cotton yarns, and acrylic yarns.

In a preferred embodiment, step 200 may include:

(1) At least one non-elastic yarn is unwound from the second core bobbin and passed through the yarn guide hook by means of negative feeding. After tension is applied by the spring tensioner, it is fed into the center tube of the hollow spindle from the lower end .

(2) After passing the elastic yarn in the drafting state around the guide roller, feed it into the central tube of the hollow spindle from the lower end, so that the non-elastic yarn and the elastic yarn in the drafting state The elastic yarns are combined at the center tube to form an elastic/non-elastic dual core yarn.

(3) After passing the elastic/non-elastic double-core yarn through the central tube, it is sent into the converging yarn guide hook under the guidance of the yarn delivery roller.

It should be noted that, during the unwinding and feeding process of the non-elastic yarn, a certain tension is applied by the spring tensioner, which can keep the non-elastic yarn with a certain degree of tension, and avoid the tension between the non-elastic yarn and the elastic yarn in the relaxed state. During the subsequent wrapping process of the wrapping yarn, the thread is affected by the tension of the wrapping yarn balloon, resulting in unstable motion, which affects the normal progress of wrapping and the formation of wrapping structure. Wherein, the adjustment of the tension of the non-elastic core yarn is realized by the spring pressure of the clip of the spring tensioner.

Step 300: Wrap the wrapping yarn on the surface of the elastic/non-elastic double-core yarn in a helical shape to form a wrapping composite yarn.

In a preferred embodiment, step 300 may include:

(1) Start the power supply of the hollow ingot so that the hollow ingot rotates at high speed.

(2) The outer wrapped yarn wound on the aluminum ingot tube is unwound with the rotation of the hollow ingot, and meets the elastic/non-elastic double-core yarn at the meeting guide hook, and forms a spiral shape. The elastic/non-elastic double-core yarn is wrapped linearly to form a composite yarn with wrapped structure.

(3) After the composite yarn with wrapping structure is led out by the yarn-drawing roller, it goes around the yarn-guiding rod, guided by the yarn-guiding ceramic eye on the traverse guide, and wound to the cylinder driven by the friction of the winding roller. tube, wherein the ratio of the surface linear velocity of the winding roller to the surface linear velocity of the yarn drawing roller is 0.5-0.7.

When the wrapping structure composite yarn is pulled out by the drawing roller, the elastic yarn in it is in a draft state under tension with a large draft multiple, if the wrapping structure composite yarn is directly wound at a drawing speed greater than or equal to On the bobbin, the elastic force of the elastic yarn will be lost along with the time effect of the storage and transportation of the wrapping structure composite yarn. Therefore, the present invention controls the elastic yarn by adjusting the surface linear velocity of the winding roller. The winding draft ratio (that is, the ratio of the surface linear velocity of the winding roller to the surface linear velocity of the yarn delivery roller) is 0.5~0.7, so that the wrapped structure composite yarn wound on the bobbin will not be damaged due to excessive winding ratio. Too large or too small will result in loose forming and loss of elasticity.

Step 400: Retreat the drafting force on the elastic yarn in the wrapping structure composite yarn, so that the elastic yarn in the wrapping structure composite yarn elastically retracts to an undrawn state, so The non-elastic yarn in the wrapping structure composite yarn is compressed and bent in the direction of the yarn axis due to the elastic retraction of the elastic yarn, and then the helical spiral of the wrapping yarn in the wrapping structure composite yarn The loops are formed by the protrusions between the threads, and the elastic loop composite yarn with wrapping structure is prepared.

After the wrapping structure composite yarn is wound to the bobbin to form the bobbin yarn, since the elastic yarn in the wrapping structure composite yarn is still in a draft state, the yarn loops produced by the composite yarn body are small and few, so in It is not easy to be deformed, entangled or broken during long-term storage and transportation.

When the user needs to use the wrapped structure composite yarn for fabric weaving, the wrapped structure composite yarn can be unwound normally from the bobbin without drafting. At this time, the elastic yarn in the wrapped structure composite yarn elastically rebounds Shrunk to the undrawn state, the non-elastic yarn in the wrapping structure composite yarn is compressed and bent in the direction of the yarn axis due to the elastic retraction of the elastic yarn, and then the helical spiral of the wrapping yarn in the wrapping structure composite yarn The protrusions between the threads form a yarn loop, and the yarn loop becomes larger as the elasticity of the elastic yarn gradually recovers, and finally forms an elastic loop composite yarn with a wrapping structure.

In order to illustrate the forming process of the yarn loop in the wrapping structure elastic loop composite yarn provided by the present invention, the formation schematic diagram of the loop in the wrapping structure elastic loop composite yarn as shown in Figure 2 is shown, in Figure 2, A It is the first stage of yarn loop formation. In stage A, the composite yarn of wrapping structure elastic loops is under tension; B is the second stage of yarn loop formation. In stage B, the wrapping structure elastic loops are compounded. The elastic yarn in the yarn retracts, and the yarn loop is gradually produced; C is the third stage of the yarn loop formation. In the C stage, the elastic yarn in the composite yarn with the wrapped structure elastic loop continues to retract, and the yarn loop continues Increase; D is the fourth stage of yarn loop formation. In the D stage, the elastic yarn in the elastic loop composite yarn with wrapped structure ends, and obvious and round loop yarn can be observed.

It should be noted that the loops in the existing loop yarn are mainly formed by short fiber whiskers. The loops obtained in this way are composed of loosely interlaced short fiber strands as a whole, and the loop structure is easily affected by external forces. Destruction, after using the existing loop yarn for subsequent fabric weaving, the fabric itself is also likely to affect the fabric wearability of the fabric due to the destruction of the loop structure, which further leads to the chain damage of the fabric itself; and the wrapping structure provided by the present invention The loops in the loop composite yarn are formed by elastic looping. The loops obtained in this way are composed of complete yarns as a whole, so the loop structure is stable and not easy to be damaged. During long-term storage and use and subsequent product preparation process The loop effect can be maintained for a long time, and after weaving the fabric with the elastic loop composite yarn with wrapping structure, the wearing performance of the fabric, especially the tactile comfort, is better than that of the existing loop yarn fabric.

Furthermore, the loop yarn is a yarn with a large number of loops distributed along the length direction. During the use of the loop yarn product prepared by it, each loop on the surface of the product is easily pulled by foreign objects, such as being pulled by a sharp object. Hooks on the edges and corners of tables and chairs, and accessories worn by users, etc. Due to the limitation of the looping method, the existing loop yarns on the market do not have any elastic characteristics, which also makes the loops of the existing loop yarn products more likely to be pulled by external forces to form fracture surfaces during daily use, which affects the appearance of the product. At the same time, the broken yarn is also pulled away from the loop yarn product, resulting in the overall scrapping of the loop yarn product; while the elastic loop composite yarn with wrapping structure provided by the present invention adopts a unique elastic looping method, so that the wrapping structure The elastic loop composite yarn itself has a certain elastic performance. The loop yarn products woven by using the elastic loop composite yarn with wrapping structure, when each yarn loop on the surface is hooked by foreign objects, wrap the elastic loop loop The elastic yarns in the composite yarn structure provide a cushioning effect, which ensures that the individual loop structures are not damaged.

In a preferred embodiment, the pitch of each helix of the wrapping yarn in the wrapping structure composite yarn varies according to a preset rule.

The pitch of each helix of the wrapping yarn in the wrapped structure composite yarn can be adjusted by the size of the wrapping twist during the wrapping process, wherein the wrapping twist is the number of turns of the wrapping yarn wrapped around the core yarn per unit length, numerically It is equal to the ratio of the hollow spindle speed (r/min) to the yarn drawing speed (surface line speed m/min) of the yarn forming roller, and the unit is twist/meter (T/m). When the wrapping twist is small, the number of wrapping yarns wrapped around the core yarn per unit length is small, and the binding effect of the wrapping yarn on the elastic/non-elastic double-core yarn is weak, and the non-elastic yarn is easy to fall from the elastic yarn when the elastic yarn retracts. Larger wrapping yarns have protruding pitches and loops, and the number of loops per unit length of the composite yarn is large and the loop shape is small; on the contrary, when the wrapping twist is large, the number of loops of the wrapping yarn per unit length of the core yarn is more , the pitch of the wrapping spiral is small, the outer wrapping yarn has a strong binding effect on the elastic/non-elastic double-core yarn, and the non-elastic yarn protrudes from the smaller pitch of the outer wrapping yarn when the elastic yarn retracts, making it difficult to loop , the number of loops per unit length of the composite yarn is small and the loop shape is large. In the present invention, the wrapping twist can be realized by adjusting the speed of the hollow spindle. Under the condition that the speeds of the feeding roller and the drawing roller are constant, the larger the rotating speed of the hollow spindle, the larger the wrapping twist. In a possible implementation manner, the wrapping twist of this technology is 400-600 T/m.

The present invention can control the pitch of each helix of the wrapping yarn in the wrapping structure composite yarn to change according to a preset rule, so that the distribution of the loops in the finally formed wrapping structure elastic loop composite yarn can be controlled.

For example, in the wrapping process, when the speed of the feed roller and yarn delivery roller is constant, adjust the speed of the hollow spindle according to the "3 times the preset speed per unit time, 1 times the preset speed per unit time" Periodic rotation speed changes, so that the twist of the wrapping yarn in the wrapping structure composite yarn is reduced by 3 times per unit time, and the pitch of the wrapping yarn on the formed wrapping structure composite yarn body is periodically increased every unit time. Loops are easier to form between these larger pitches.

In a preferred embodiment, the number of said non-elastic yarns is at least two, and the color of each non-elastic yarn is different; the color of said non-elastic yarn is different from the color of said wrapping yarn.

When the number of non-elastic yarns used in the present invention is at least two, and the colors of each non-elastic yarn are different, the surface of the composite yarn with wrapped structure elastic loops can form various loops of different colors. After the composite yarn with wrapped elastic loops is woven into a fabric, the surface layer of the fabric has a mixed-color effect of multi-color loops, and due to the increase in the number of loops, the density of the loop layer of the fabric increases, thereby increasing the thickness and elasticity. . When multiple non-elastic yarns of the same color are used, it will also increase the density of the loop layer of the fabric, thereby increasing the thickness and elasticity of the loop layer of the fabric. It can complement and optimize each other; when the non-elastic yarn and the outer wrapping yarn have different colors, the fabric will form a fur-like structure, that is, the fur layer is formed by yarn loops, and the color is the color of the loop; the cortex is formed by the yarn body, and the color is non-elastic The color mixing of the yarn and the wrapping yarn, and when the yarn loops are relatively sparse, the color of the main body of the fabric will also be partially presented through the yarn loop layer, which increases the level of the apparent color of the fabric.

It should be noted that the feeding of multiple non-elastic yarns can be realized by adding a feeding unit of non-elastic yarns.

In summary, the present invention provides a method for preparing elastic loop composite yarn with wrapped structure, by merging elastic yarns and non-elastic yarns in a draft state to form elastic/non-elastic double-core yarns, And use the outer wrapping yarn to wrap to form the wrapped structure composite yarn, and finally recede the drafting force on the elastic yarn in the wrapped structure composite yarn, so that the elastic yarn in the wrapped structure composite yarn elastically retracts to the limit. In the drafting state, the non-elastic yarn is compressed and bent in the direction of the yarn axis due to the elastic retraction of the elastic yarn, and then protrudes between the spirals of the wrapping yarn in the wrapping structure composite yarn to form a loop, and the obtained Wrap structure elastic loop composite yarn. The wrapped structure elastic loop composite yarn prepared by the present invention is wound and stored in the form of wrapped structure composite yarn before the yarn loop is formed, and is unwound to form a yarn loop during use, thereby ensuring the loop composite yarn in the long run The quality of the loops will not be affected after time storage and delivery, which is beneficial to the subsequent application of loop composite yarns.

Further, the present invention designs various process parameters in the preparation process, such as the elastic yarn linear density, the wrapping twist of the outer wrapping yarn, the drafting ratio of the elastic yarn, and the winding draft of the wrapped structure composite yarn. The numerical range of the elongation multiple, etc., are all obtained by the inventor through a large number of creative experiments, research and tests, so as to ensure that the final prepared elastic loop composite yarn with wrapped structure has good loop shape and good elastic performance, ensuring The shape of the yarn loop is not easy to be damaged during storage, transportation and subsequent use.

Fig. 3 is a schematic diagram of a device for preparing a composite yarn with elastic loops with wrapping structure according to an exemplary embodiment. The device is applied to the preparation of the composite yarn with elastic loops with wrapping structure. The preparation device of the loop composite yarn includes a first yarn drawing module, a second yarn drawing module, a combining and wrapping module and a yarn forming and winding module;

Wherein, the first yarn drawing module includes a first core yarn bobbin 110, elastic yarns are wound on the first core yarn bobbin 110, and the first core yarn bobbin 110 is frictionally connected with the feeding roller 120, A guide roller 130 is provided on one side of the rotation direction of the first core yarn bobbin 110, and the feed roller 120 and the guide roller 130 are used to apply a draft force of a preset draft multiple to the elastic yarn , making the elastic yarn in a stretched state.

The second yarn introduction module includes a second core yarn bobbin 210, on which non-elastic yarns are wound, and a yarn guide hook 220 is arranged above the center line of the second core yarn bobbin 210, One side of the yarn guide hook 220 is provided with a spring tensioner 230, and the spring tensioner 230 is used to apply tension to the non-elastic yarn.

The merging and wrapping module is arranged above the first yarn drawing module and the second yarn drawing module, and the merging and wrapping module includes a hollow ingot 310, and an aluminum ingot tube is provided on the hollow ingot 310 320, the aluminum ingot tube 320 is wound with an outer wrapping yarn, the central tube of the hollow ingot 310 is provided with a converging yarn guide hook 330, and the converging yarn guide hook 330 is used to guide the first yarn drawing module The elastic yarn drawn out and the non-elastic yarn drawn out by the second yarn drawing module are combined to form an elastic/non-elastic dual-core yarn.

A yarn forming and winding module is provided above the merging and wrapping module, and the yarn forming and winding module includes a yarn drawing roller 410, a yarn guide rod 420, a traverse guide 430, a winding roller 440 and The bobbin 450, the winding roller 440 is in friction transmission connection with the bobbin 450.

In a preferred embodiment, the surface linear velocity of the guide roller 130 in the first yarn drawing module is greater than the surface linear velocity of the feeding roller 120 .

In a preferred embodiment, the ratio of the surface linear velocity of the winding roller 440 in the yarn forming winding module to the surface linear velocity of the yarn delivery roller 410 is 0.5-0.7.

In a possible implementation, the process for preparing the elastic loop composite yarn with wrapped structure by using the above-mentioned preparation device for elastic loop composite yarn with wrapped structure includes:

The elastic yarn is unwound from the first core yarn bobbin 110 through the frictional transmission of the feeding roller 120 of the first yarn delivery module, then bypasses the yarn guide roller 130, and passes through the center of the hollow spindle 310 in the combining and wrapping module from below At the same time, the non-elastic yarn is unwound from the second core yarn tube 210 of the second yarn drawing module and passed through the yarn guide hook 220, and after the tension is applied by the spring tensioner 230, it is inserted from below and wrapped The central tube of the hollow spindle 310 in the module, so that the non-elastic yarn and the elastic yarn are combined in the central tube to form an elastic/non-elastic dual-core yarn; the elastic/non-elastic dual-core yarn passes through the central tube of the hollow spindle 310 Finally, it is guided upward by the meeting guide hook 330, and at the same time, the outer wrapped yarn wound on the aluminum spindle tube 320 is unwound with the rotation of the hollow spindle 310, and meets the elastic/non-elastic double-core yarn at the meeting guide hook 330 , and spirally wrapped on the surface of the elastic/non-elastic double-core yarn to form a composite yarn with a wrapping structure; The yarn rod 420 is guided by the yarn guide ceramic eye on the traverse guide 430, and wound to the bobbin 450 driven by the friction of the winding roller 440; when fabric needs to be prepared, the wrapping structure on the bobbin 450 is compounded The yarn is unwound without drafting, so as to recede the drafting force on the elastic yarn in the wrapping structure composite yarn, so that the elastic yarn in the wrapping structure composite yarn elastically retracts to an undrawn state, wrapping The non-elastic yarn in the entangled structure composite yarn is compressed and bent in the direction of the yarn axis due to the elastic retraction of the elastic yarn, and then protrudes between the spirals of the wrapped yarn in the wrapped structure composite yarn to form a yarn loop. The elastic loop composite yarn with wrapping structure is prepared.

In summary, the present invention provides a preparation device for elastic loop composite yarn with wrapped structure. By improving the existing hollow spindle covering machine, the elastic yarn and non-elastic yarn in the draft state The threads are combined to form an elastic/non-elastic double core yarn, and the wrapping yarn is wrapped to form a wrapping structure composite yarn, and finally the drafting force on the elastic yarn in the wrapping structure composite yarn is receded, so that the wrapping structure is compounded The elastic yarn in the yarn elastically retracts to the undrawn state, and the non-elastic yarn is compressed and bent in the direction of the yarn axis due to the elastic retraction of the elastic yarn, and then wraps the yarn in the wrapped structure composite yarn The protrusions between the helical threads form yarn loops, and the elastic loop composite yarn with wrapping structure is prepared. The wrapped structure elastic loop composite yarn prepared by the present invention is wound and stored in the form of wrapped structure composite yarn before the yarn loop is formed, and is unwound to form a yarn loop during use, thereby ensuring the loop composite yarn in the long run. The quality of the loops will not be affected after time storage and delivery, which is beneficial to the subsequent application of loop composite yarns.

In order to better illustrate the preparation method and device of the wrapping structure elastic loop composite yarn provided by the present invention, it is shown that the preparation method and the preparation device of the wrapping structure elastic loop composite yarn are prepared to obtain the wrapping structure elastic loop composite yarn. Various examples 1-9 of yarns:

Example 1:

The process parameters are as follows:

Elastic yarn: spandex elastic yarn 140D/F1 (monofilament), transparent;

Non-elastic yarn: pure cotton natural white ring yarn 32S (English branch);

Outer wrapping yarn: polyester DTY (stretch textured yarn) low elastic yarn, 70D/24F (multifilament, composed of 24 monofilaments, total density 70D), natural white;

Elastic yarn draft ratio: 2.2;

Wrapping twist: 468 twists/m;

Wrapping twist direction: S twist;

Winding draft ratio: 0.6;

The product schematic diagram of the prepared elastic loop composite yarn with wrapping structure is shown in Figure 4. When the spandex elastic core filament draft ratio is small, the composite yarn has small loops and the yarn loops are not obvious.

Example 2:

The process parameters are as follows:

Elastic yarn: spandex elastic yarn 140D/F1 (monofilament), transparent;

Non-elastic yarn: pure cotton natural white ring yarn 32S (English branch);

Outer wrapping yarn: polyester DTY (stretch textured yarn) low elastic yarn, 70D/24F (multifilament, composed of 24 monofilaments, total density 70D), natural white;

Elastic yarn draft ratio: 2.8;

Wrapping twist: 468 twists/m;

Wrapping twist direction: S twist;

Winding draft ratio: 0.6;

The product schematic diagram of the prepared wrapped structure elastic loop composite yarn is shown in Figure 5. The difference between this embodiment and Example 1 is only the difference in the drafting ratio of the spandex elastic yarn. As can be seen from Figure 5, when When the draft ratio of spandex elastic yarn is increased to 2.8, the composite yarn has better looping effect.

Example 3:

The process parameters are as follows:

Elastic yarn: spandex elastic yarn 140D/F1 (monofilament), transparent;

Non-elastic yarn: polylactic acid (PLA) white ring-spun yarn 32S (English branch);

Outer wrapping yarn: polyester DTY (stretch textured yarn) low elastic yarn, 70D/24F (multifilament, composed of 24 monofilaments, total density 70D), black;

Elastic yarn draft ratio: 2.8;

Wrapping twist: 468 twists/m;

Wrapping twist direction: S twist;

Winding draft ratio: 0.6;

The product schematic diagram of the prepared wrapping structure elastic loop composite yarn is shown in Figure 6. The difference between this example and Example 2 is that the types of non-elastic yarn and wrapping yarn are different. Example 2 is pure cotton white Ring-spun yarn, the present embodiment is polylactic acid white ring-spun yarn with the same linear density. It can be seen from Figure 6 that since the bending stiffness of polylactic acid yarn is greater than that of pure cotton yarn, the roundness of the loop formed is better. In this embodiment, black wrapping yarn is used, so the loop of the composite yarn is white, and the main body is black and white mixed-color hemp gray. Because the black wrapping yarn wraps the white core yarn, the gray scale is darker.

Example 4:

The process parameters are as follows:

Elastic yarn: spandex elastic yarn 140D/F1 (monofilament), transparent;

Non-elastic yarn: polylactic acid (PLA) white ring-spun yarn 32S (English branch);

Outer wrapping yarn: polyester DTY (stretch textured yarn) low elastic yarn, 70D/24F (multifilament, composed of 24 monofilaments, total density 70D), black;

Wrapping twist direction: S twist;

Elastic yarn draft ratio: 4.4;

Wrapping twist: 468 twists/m;

Winding draft ratio: 0.6;

The product schematic diagram of the prepared wrapping structure elastic loop composite yarn is shown in Figure 7. The difference between this embodiment and Example 3 lies in the drafting ratio of the spandex elastic yarn. As can be seen from Figure 7, the spandex elastic yarn After the draft ratio is increased from 2.8 in Example 3 to 4.4 in this example, the loop size becomes larger.

Example 5:

The process parameters are as follows:

Elastic yarn: spandex elastic yarn 140D/F1 (monofilament), transparent;

Non-elastic yarn: acrylic (30)/viscose (10)/tencel (20)/cotton (10)/bamboo viscose (30) compact twin-spun yarn, 60S (English branch), black;

Outer wrapping yarn: nylon 6 DTY (stretch textured yarn) low elastic yarn, 70D/24F (multifilament, composed of 24 monofilaments, total density 70D), natural white;

Wrapping twist direction: S twist;

Elastic yarn draft ratio: 4.4;

Wrapping twist: 468 twists/m;

Winding draft ratio: 0.6;

The product schematic diagram of the prepared wrapped structure elastic loop composite yarn is shown in Figure 8. The non-elastic yarn in this embodiment is black, and the outer wrapped yarn is white. As shown in Figure 8, the yarn ring is black, and the main body of the yarn is White overwrap wraps non-elastic yarns with less linear density, giving it a light heather gray color.

Embodiment 6:

The process parameters are as follows:

Elastic yarn: spandex elastic yarn 140D/F1 (monofilament), transparent;

Non-elastic yarn: cashmere yarn, 60S (English count), dark gray;

Outer wrapping yarn: nylon 6 DTY (stretch textured yarn) low elastic yarn, 70D/24F (multifilament, composed of 24 monofilaments, total density 70D), natural white;

Wrapping twist direction: S twist;

Elastic yarn draft ratio: 2.8;

Wrapping twist: 468 twists/m;

Winding draft ratio: 0.6;

The product schematic diagram of the prepared wrapped structure elastic loop composite yarn is shown in 9. The non-elastic yarn used in this embodiment is cashmere yarn, and the sweater is knitted with this yarn, and the loop layer formed by the cashmere yarn contacts the skin. Although the amount of cashmere yarn is less, the wearing comfort of cashmere sweater can still be obtained.

Embodiment 7:

The process parameters are as follows:

Elastic yarn: spandex elastic yarn 140D/F1 (monofilament), transparent;

Non-elastic yarn: polyester (PET) NSY (air network yarn), 167dtex/48F, 140 nodes/m, royal blue;

Outer wrapping yarn: nylon 6 DTY (stretch textured yarn) low elastic yarn, 70D/24F (multifilament, composed of 24 monofilaments, total density 70D), natural white;

Wrapping twist direction: S twist;

Elastic yarn draft ratio: 2.8;

Wrapping twist: 468 twists/m;

Winding draft ratio: 0.5;

The product diagram of the prepared wrapping structure elastic loop composite yarn is shown in Figure 10. In this embodiment, royal blue polyester network yarn is used as the non-elastic yarn. It is a melange of white overwrap and royal blue core yarn, lighter in color (white overwrap over royal blue non-elastic yarn).

Embodiment 8:

The process parameters are as follows:

Elastic yarn: spandex elastic yarn 140D/F1 (monofilament), transparent;

Non-elastic yarn: polyester (PET) NSY (air network yarn), 167dtex/48F, 140 nodes/m, royal blue;

Wrapped yarn: polyester (PET) NSY (air network yarn), 167dtex/48F, 140 nodes/m, royal blue;

Wrapping twist direction: S twist;

Elastic yarn draft ratio: 2.8;

Wrapping twist: 468 twists/m;

Winding draft ratio: 0.5;

The product schematic diagram of the prepared wrapping structure elastic loop composite yarn is shown in Figure 11. In this example, royal blue polyester network yarn is used as the non-elastic yarn and the outer wrapping yarn, and the yarn loop is royal blue as shown in Figure 11 color, and the yarn body is also royal blue.

Embodiment 9:

The process parameters are as follows:

Elastic yarn: Spandex elastic yarn 230D/F1 (monofilament), transparent;

Non-elastic yarn: polyester (PET) NSY (air network yarn), 167dtex/48F, 140 nodes/m, royal blue;

Non-elastic yarn 2: polyester (PET) NSY (air network yarn), 167dtex/48F, 140 nodes/m, bright red;

Outer wrapping yarn: polyester (PET) DTY, 75D/36F, off-white;

Wrapping twist direction: S twist;

Elastic yarn draft ratio: 4.4;

Wrapping twist: 468 twists/m;

Winding draft ratio: 0.6;

The product schematic diagram of the prepared wrapped elastic loop composite yarn is shown in Figure 12. In this embodiment, two non-elastic yarns are fed on both sides. It can be seen from Figure 12 that the loop cores of two colors The yarn is basically looped at the same position of the yarn body.

It can be clearly observed from Fig. 4-Fig. 12 that the loop shape of the elastic loop composite yarn with wrapped structure provided by the embodiment of the present invention is good, and the loop structure is relatively stable and not easily damaged.

In addition, when using the elastic loop composite yarn with wrapping structure prepared by the present invention to prepare the fabric, the surface layer of the fabric is covered by loops, and its structure is relatively loose, which itself can also give the following properties to the fabric:

1) Touch softness: The loose loop layer makes the skin softer. If the yarn with better softness is selected as the looping yarn, the softness of the fabric contact will be better.

2) Heat and humidity comfort. The fabric woven from the yarn is loose and porous. In addition to the loose structure of the surface ring layer, the helically wound outer wrapping yarn will also relax and fluff up a little due to the shrinkage of the spandex, making the inner structure of the fabric loose. The loose structure, in addition to giving the fabric a fluffy, soft and comfortable touch, as an outerwear fabric, the air can easily circulate in the fabric, and it is easy to dissipate heat and moisture; as an underwear material, it can store more static air and has good warmth retention sex. That is to say, by rationally selecting the materials of the loop core yarn and the wrapping yarn, and controlling the density and size of the yarn loops, fabrics suitable for different seasons with good comprehensive wearing properties can be produced.

3) Color mixing and discoloration appearance. When one or more colored non-elastic looping core yarns are used, combined with the choice of the color of the outer wrapping yarn, the mixed-color appearance of the yarn and its fabric can be obtained. The melange effect is also altered by partially straightening the loops, thus changing the color of the fabric.

In the present invention, stretched elastic yarns and non-elastic yarns are used to form multi-core yarns, and a kind of "yarn / "Yarn" wrapping structure elastic loop composite yarn, which expands the product design range of hollow spindle covered spinning machine. The prepared elastic loop composite yarn with wrapped structure has both elasticity and "yarn body-loop" layered structure, which can be used in the development of elastic fabrics, and endow the fabrics with special appearance and/or wearing properties.

When the transparent spandex monofilament is used as the elastic yarn, the fabric woven with the elastic loop composite yarn of the wrapped structure, as long as the elongation of the yarn in the fabric is less than the draft ratio of the transparent spandex monofilament (in practical The medium fabric is rarely likely to produce an elongation greater than the draft ratio of the transparent spandex monofilament), and the loops on the surface of the yarn will form a relatively loose loop layer on the surface of the fabric. That is, the non-elastic core yarn when spinning the yarn finally constitutes the surface loop layer of the fabric, and the clothing processed from this fabric is the loop layer that is in contact with the skin (what kind of fiber you want to contact the skin, Just use its yarn as core yarn). This technology endows the ability to control the structure of yarns and fabrics, and then has the ability to control the wearing performance of fabrics, mainly tactile comfort, such as touch softness, touch warmth and so on. For example, if the fabric is required to have a cool feeling on contact, yarns made of fiber materials with a cool feeling (such as bamboo pulp fiber and silk fiber) can be selected as the non-elastic core yarn (loop yarn); if the fabric is required to have a touch If you want a warm feeling, you can choose yarns made of fiber materials that are in contact with warmth (such as cotton fibers, plush fibers) as non-elastic loop core yarns.

Although the foregoing has described the present invention in detail with general descriptions, specific embodiments and tests, it is obvious to those skilled in the art that modifications or improvements can be made on the basis of the present invention. Therefore, the modifications or improvements made on the basis of not departing from the spirit of the present invention all belong to the protection scope of the present invention.

Other embodiments of the invention will be readily apparent to those skilled in the art from consideration of the specification and practice of the invention herein. The present invention is intended to cover any modification, use or adaptation of the present invention. These modifications, uses or adaptations follow the general principles of the present invention and include common knowledge or conventional technical means in the technical field not disclosed in the present invention . It should be understood that the present invention is not limited to the precise structures and methods which have been described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof.

Claims (10)

1. a kind of preparation method of looping structure elastic ring circle composite yarn, which is characterized in that the described method includes:

It is continuously applied the drafting force of default drafting multiple to stretch yarn, the stretch yarn is made to be in drawing-off state；

It by non-elastic yarn and the stretch yarn under the drawing-off state and closes, forms elasticity/non-resilient twin-core yarn；

Outer fasciated yarn is wrapped in the elasticity/non-resilient twin-core yarn surface in spiral form, forms looping structure composite yarn simultaneously It winds, stretch yarn described in the looping structure composite yarn after winding is in drawing-off state；

The drafting force decorporated to stretch yarn described in the looping structure composite yarn, so that the looping structure composite yarn In the stretch yarn elastical retraction to undrawn state, non-elastic yarn described in the looping structure composite yarn is because of institute The bending compression in the elastical retraction effect generation yarn axis direction of stretch yarn is stated, and then in the looping structure composite yarn Looping structure elastic ring circle composite yarn is prepared in convex shaped resultant yarn circle between the helical of outer fasciated yarn.

2. the method according to claim 1, wherein looping structure composite yarn China and foreign countries fasciated yarn is each The screw pitch of helical is by default rule variation.

3. the method according to claim 1, wherein described be continuously applied default drafting multiple to stretch yarn Drafting force makes the stretch yarn be in drawing-off state, comprising:

Stretch yarn is acted on through feeding roller frictional drive and bypasses cord roller, the feeding roller and institute after the unwinding of the first heart yarn cylinder It states and is driven between cord roller by chain drive system, the linear resonance surface velocity of the cord roller is greater than the surface linear speed of the feeding roller Degree makes to apply the drafting force of default drafting multiple to the stretch yarn between the cord roller and the feeding roller The stretch yarn is in drawing-off state.

4. according to the method described in claim 3, it is characterized in that, described by non-elastic yarn and the institute under drawing-off state It states stretch yarn and closes, form elasticity/non-resilient twin-core yarn, comprising:

At least one non-elastic yarn is unwound and is passed through twizzle from the second heart yarn cylinder by the way of passiveness feeding, through spring After formula tensioner applies tension, from the central tube of lower end feeding hollow ingot；

By the stretch yarn under drawing-off state around after cord roller, the central tube of the hollow ingot is fed from lower end, So that the non-elastic yarn in the central tube and is closed with the stretch yarn under drawing-off state, formed elastic/non- Elastic twin-core yarn；

After the elasticity/non-resilient twin-core yarn is passed through the central tube, congregation twizzle is sent under the guidance for drawing yarn roller.

5. according to the method described in claim 4, it is characterized in that, described be wrapped in the bullet in spiral form for outer fasciated yarn Property/non-resilient twin-core yarn surface, it forms looping structure composite yarn and winds, comprising:

Start the power supply of the hollow ingot, so that the hollow ingot high-speed rotation；

The outer fasciated yarn being wound on the aluminium ingot pipe is unwound with the rotation of the hollow ingot, at the congregation twizzle with The elasticity/non-resilient twin-core yarn merges, and is wrapped in the elasticity/non-resilient twin-core yarn surface in spiral form, forms looping Structure composite yarn；

After the looping structure composite yarn is drawn the extraction of yarn roller, lever jack is bypassed, through the yarn poteye on traverse guide Guidance, is wound to by the bobbin of take-up roll frictional drive, wherein the linear resonance surface velocity of the take-up roll draws yarn roller surface with described The ratio of linear velocity is 0.5 ~ 0.7.

6. the method according to claim 1, wherein the stretch yarn includes transparent spandex monofilament, the bullet The line density of power yarn is 70D ~ 250D, and the drafting multiple of the stretch yarn is 2.5 ~ 5 times, and the looping of the outer fasciated yarn is twisted Degree is 400-600 twists/m.

7. each the method according to claim 1, wherein the quantity of the non-elastic yarn is at least two The color of non-elastic yarn is different；The color of the non-elastic yarn is different from the color of the outer fasciated yarn.

8. a kind of preparation facilities of looping structure elastic ring circle composite yarn, which is characterized in that described device draws yarn mould including first Block, second draw yarn module and close looping module and resultant yarn winding module；

Wherein, described first to draw yarn module include the first heart yarn cylinder, is wound with stretch yarn on the first heart yarn cylinder, and described the One heart yarn cylinder is connect with feeding roller frictional drive, and the first heart yarn cylinder rotation direction side is equipped with cord roller, the feeding roller It is used to apply the stretch yarn drafting force of default drafting multiple with the cord roller, the stretch yarn is made to be in drawing-off State；

Described second to draw yarn module include the second heart yarn cylinder, is wound with non-elastic yarn on the second heart yarn cylinder, and described second Twizzle is equipped with above heart yarn cylinder center line, the side of the twizzle is equipped with spring tensioner, the spring tensioner For applying tension to non-elastic yarn；

Described first, which draws yarn module and described second, draws and is equipped with described above yarn module and closes looping module, described and close looping mould Block includes hollow ingot, and with aluminium ingot pipe is arranged on the hollow ingot, outer fasciated yarn, the hollow ingot are wound on the aluminium ingot pipe Central tube above be equipped with congregation twizzle, the congregation twizzle be used for by described first draw yarn module extraction stretch yarn The non-elastic yarn and closing for drawing the extraction of yarn module with described second to form elasticity/non-resilient twin-core yarn；

Described and close and be equipped with resultant yarn winding module above looping module, the resultant yarn winding module successively includes drawing yarn from the bottom to top Roller, lever jack, traverse guide, take-up roll and bobbin, the take-up roll are connect with the bobbin frictional drive.

9. device according to claim 8, which is characterized in that described first draws the surface line of cord roller described in yarn module Speed is greater than the linear resonance surface velocity of the feeding roller.

10. device according to claim 8, which is characterized in that the surface of take-up roll described in the resultant yarn winding module Linear velocity and the ratio for drawing yarn roller surface linear velocity are 0.5 ~ 0.7.