CN107488908A - A kind of mixed yarn process units and production method - Google Patents

Abstract

The invention provides a blended yarn production device and production method. The production device includes a roving feeding and mixing device and a mixed roving drafting device. The roving feeding and mixing device includes a roving false twisting and untwisting device and a roving carding and converging device. The fed two rovings with the opposite twist direction and the same twist are untwisted in the roving false twist untwisting device, and then the fibers in the untwisted roving pass through the strip shape of the roving carding and converging device. The teeth realize the mixing of the fibers in the two rovings. After the untwisting twist disappears, the mixed fibers can obtain the mixed roving with no twist effect. The twistless mixed roving is drafted by the mixed roving drafting device to obtain the mixed fiber strands with weak twist. , the mixed fiber strands are twisted under the action of the twist of the spun yarn to obtain the final blended yarn, which realizes the full mixing of the two rovings in the fibrous state before they are fed into the drafting zone, improves the mixing effect, and at the same time directly realizes the blending in the spinning process Spinning production, improve spinning efficiency.

Description

A kind of blended yarn production device and production method

technical field

The invention relates to the technical field of textiles, in particular to a blended yarn production device and production method.

Background technique

With the continuous development of social economy and the continuous improvement of people's living standards, people's consumption concepts are constantly updated, and the requirements for the functionality and wearability of clothing are getting higher and higher, especially for antibacterial, health care, and hand quality of clothing. On the other hand, with the development of the economy, the application fields of various functional fibers and textiles are gradually expanding. Therefore, more and more attention has been paid to the research and development of fiber materials with various special functions, and the types of functional fiber materials are becoming more and more complete. However, the performance of various existing functional fibers is often relatively single. For example, bamboo charcoal fiber has excellent antibacterial properties, but its hand feeling, skin affinity, cohesion and spinnability are poor. Textiles require a variety of fibers to be blended. How to choose different types and different proportions of fibers for blending, and what kind of spinning process to use to spin functional high-quality yarns with better performance, will be urgently resolved. question.

In view of this, the present invention provides a blended yarn production device and production method. In the spun yarn process, the untwisting of the false twist twist is performed on the two fed rovings with opposite twists, and then the rovings that have undergone the untwisting action are untwisted. The fibers in the two rovings are mixed through the saw-toothed bell mouth. After the untwisting twist of the mixed fibers disappears, a mixed roving without twist is obtained, so that the two rovings are fed into the drafting area. Fully mixed under the fiber form to improve the mixing effect, and at the same time directly realize the production of blended yarn in the spinning process to improve spinning efficiency.

Contents of the invention

The purpose of the present invention is to provide a blended yarn production device and production method, to realize the full mixing of the two fed rovings in the fibrous state before entering the drafting zone in the spinning process, improve the mixing effect, and at the same time The process directly realizes the production of blended yarn and improves spinning efficiency.

In order to achieve the above object, the technical solution adopted by the present invention is: a blended yarn production device, including a roving feeding and mixing device and a mixed roving drafting device, and the mixed roving drafting device includes a front roller and a front top roller. The front roller pair, the middle roller pair composed of the middle roller and the middle top roller, the rear roller pair composed of the rear roller and the rear top roller, the front roller is driven by the main motor to rotate, and the middle roller and the front roller pass through the first gear transmission connection, the rear roller and middle roller are connected through a second gear transmission, and the function of the mixed roving drafting device is to draft the untwisted mixed roving outputted by the roving feeding and mixing device to obtain a weakly twisted roving Mixed fiber strands, the roving feeding and mixing device includes a roving false-twisting and untwisting device and a roving carding and converging device, the roving false-twisting and untwisting device is a strip belt structure, and the roving false-twisting and untwisting device passes through a pulley block Fixed on the carriage surface of the spinning frame, the roving false twisting and untwisting device surrounds the spinning frame for a week, the roving false twisting and untwisting device surrounds the front and rear carriages of the spinning frame, and the roving false twisting and untwisting device The device is driven to rotate by a first servo motor, and the first servo motor is connected to a programmable logic controller, and the programmable logic controller is connected to a touch screen, and the first roving and the second roving to be fed are set in the touch screen Twist input interface, the first roving and the second roving are fed after being unwound by the first roving bobbin and the second roving bobbin placed on the yarn guide frame, wherein the twist of the first roving and the second roving are the same but the twist direction is opposite , the fed first roving enters the roving carding and converging device after contacting the upper part of the roving false twisting and untwisting device, the contact part of the first roving and the roving false twisting and untwisting device forms the first false twisting and untwisting working surface, and the feeding The second roving and the lower part of the roving false twisting and untwisting device contact and then enter the roving carding and converging device, and the contact part between the second roving and the roving false twisting and untwisting device forms a second false twisting and untwisting working surface, and the roving carding The converging device includes an upper arc-shaped mouth and a lower arc-shaped mouth. The upper arc-shaped mouth and the lower arc-shaped mouth are both concave arc-shaped structures. The diameter of the circle where the upper arc-shaped mouth is located is larger than the circle where the lower arc-shaped mouth is located. The diameter of the upper arc-shaped mouth is the same as that of the lower arc-shaped mouth. The upper arc-shaped mouth and the lower arc-shaped mouth are connected by the bottom arc surface, and the upward side of the upper arc-shaped mouth There are bar-shaped teeth evenly arranged on the top, the bottom arc surface of the roving carding and converging device is fixedly connected with the guide rod, and the left end and right end of the guide rod are respectively fixed on the left side and the right side of the spinning frame through a left rotation device and a right rotation device. On the right side, the left rotating device and the right rotating device are jointly driven to rotate by the second motor, and the upper arc opening of the roving carding and converging device is close to the lower part of the roving false twisting and untwisting device.

The invention also relates to a method for producing blended yarn. During spinning, the first roving and the second roving, which have different raw materials, the same twist, and opposite twist directions, pass through the first roving bobbin and the second roving placed on the yarn guide frame. The tube is fed after unwinding, and the second motor drives the left rotating device and the right rotating device to rotate together so that the bar-shaped teeth of the upper arc-shaped opening of the roving carding and converging device do not contact the first and second rovings. Input the twist and twist direction of the first roving and the second roving fed into the twist input interface of the first roving and the second roving, and then the programmable logic controller calculates the rotating speed, According to the input twist direction, the rotation direction of the roving false twisting and untwisting device is obtained, and the programmable logic controller controls the rotation of the first servo motor according to the obtained rotation speed and direction, and then drives the roving false twisting and untwisting device to rotate around the spinning frame, feeding The incoming first roving is in contact with the upper part of the roving false-twisting and untwisting device, and the first false-twisting and untwisting working surface is in contact with the first roving and is driven by the friction between the two to be located on the upper part of the first false-twisting and untwisting working surface. The first roving rotates in the same direction as that of the roving false twisting and untwisting device, and then produces the first untwisting twist to the first roving located on the upper part of the first false twisting and untwisting working surface, and the twist direction of the first untwisting twist The twist direction of the first roving is opposite to that of the first roving, and the magnitude of the first untwisting twist is the same as that of the first roving, so that an untwisting effect is produced on the first roving located on the upper part of the first false twisting untwisting working surface, so that the first roving The fibers in a roving are in a fiber-like dispersed state, and at the same time, the first twisting degree is generated for the first roving located at the lower part of the first false twisting and untwisting working surface, and the twisting direction of the first twisting degree is consistent with the twisting degree of the first roving The twist direction is the same, the twist of the first twisting is the same as that of the first roving, the second roving fed in is in contact with the lower part of the roving false twisting and untwisting device, and is connected to the second roving on the second false twisting and untwisting working surface. Contact and due to the friction between the two, the second roving located on the upper part of the second false-twisting and untwisting working surface is driven to rotate in the opposite direction to the rotation direction of the roving false-twisting and untwisting device, and then rotates against the second false-twisting and untwisting working surface. The second roving at the top produces a second untwisting twist, and the twisting direction of the second untwisting twist is opposite to the twisting direction of the second roving, and the second untwisting twist is the same as the twist of the second roving. The second roving on the upper part of the second false twisting and untwisting working surface produces an untwisting effect, so that the fibers in the second roving are in a fiber-like dispersed state, and at the same time, the second roving located at the lower part of the second false twisting and untwisting working surface is generated. The second twist twist, and the twist direction of the second twist twist is the same as the twist twist direction of the second roving, the size of the second twist twist is the same as the twist of the second roving, when the first servo motor starts to work, The second motor drives the left rotating device and the right rotating device to rotate together so that the bar-shaped teeth of the upper arc-shaped mouth of the roving carding and converging device are in contact with the first roving and the second roving, and the roving false twisting and untwisting device is positioned at the first When untwisting the first roving on the upper part of the false twisting and untwisting working surface and the second roving on the upper part of the second false twisting and untwisting working surface, the two are brought together at the same time, so that the fiber-like The fibers in the first roving and the second roving in the loose state are mixed with each other, and the mixed fibers continue to move downward, before being affected by the first twisting degree and the second twisting degree, they are combed and converged by the roving carding and converging device. The bar-shaped teeth of the upper arc-shaped mouth are divided into 3-8 fiber bundles, and each fiber bundle contains the fibers in the first roving and the second roving, and then the fibers in the first roving and the second roving in each fiber bundle The fibers in the two rovings return to the twists of the first roving and the second roving under the action of the first twist twist and the second twist twist respectively, and because the twist of the first roving and the second roving is the same but the twist direction is opposite, Each fiber bundle is in an untwisted state, so that the fibers in the first roving and the fibers in the second roving in each fiber bundle are more fully mixed, and then each fiber bundle is moved along the bottom of the roving carding and converging device The arc moves downward. During this process, due to the reduction of the caliber of the roving carding and converging device, the fiber bundles are mixed with each other, so that the untwisted roving is obtained at the lower arc-shaped mouth of the roving carding and converging device. The main motor drives The front roller rotates, and then drives the front top roller to rotate synchronously. The front roller rotates and then drives the middle roller to rotate through the first gear, and then drives the middle top roller to rotate synchronously. The rollers rotate synchronously. The roving first enters the rear roller pair, then enters the middle roller pair, and is drafted by the rear drafting zone formed between the rear roller pair and the middle roller pair, and then enters the front roller pair, and is drawn by the middle roller pair. The drafting effect of the front drafting zone formed between the front roller pair and the mixed fiber strands with weak twist is obtained, and the mixed fiber strands are twisted under the action of the twist of the spun yarn to obtain the final blended yarn.

The advantage of the present invention is: through the untwisting of the false twist twist of the two fed rovings with opposite twisting directions, and then the fibers in the untwisted rovings realize the twisting in the two rovings through the saw-toothed bell mouth. Mixing of fibers, after the untwisting twist disappears, the mixed rovings can be obtained without twisting, so as to realize the full mixing of the two rovings before they are fed into the drafting zone, improve the mixing effect, and at the same time directly Realize the production of blended yarn and improve spinning efficiency.

Description of drawings

Fig. 1 is a schematic structural view of the spinning device of the present invention.

detailed description

As shown in Figure 1, a blended yarn production device includes a roving feeding mixing device and a mixed roving drafting device. The mixed roving drafting device includes a front roller pair 7 composed of a front roller and a front top roller, a middle roller and a middle roller. The middle roller pair 8 composed of top rollers, the rear roller pair 9 composed of the rear roller and the rear top roller, the front roller is driven by the main motor to rotate, the middle roller and the front roller are connected through the first gear transmission, the rear roller and the middle roller The mixed roving drafting device is used to draw the untwisted mixed roving outputted by the roving feeding and mixing device to obtain mixed fiber strands with weak twist. The roving feeding and mixing device includes roving false twist The untwisting device 3 and the roving carding and converging device 4, the roving false twisting and untwisting device is a strip belt structure, the roving false twisting and untwisting device is fixed on the car table of the spinning frame through the pulley block, and the roving false twisting and untwisting device surrounds the spinning frame One week, the roving false-twisting and untwisting device surrounds the front and rear carriage tables of the spinning frame, and the roving false-twisting and untwisting device is driven to rotate by the first servo motor, which is connected to the programmable logic controller, and the programmable logic controller The controller is connected with the touch screen, and the touch screen is provided with the twist input interface of the fed first roving 1 and the second roving 2, and the first roving 1 and the second roving 2 pass through the first roving drum and the second The two roving bobbins are fed after unwinding, wherein the twist of the first roving and the second roving are the same but the twist direction is opposite, the fed first roving contacts with the upper part of the roving false twisting and untwisting device and then enters the roving carding and converging device. The contact part between a roving and the roving false-twisting and untwisting device forms the first false-twisting and untwisting working surface, and the fed-in second roving contacts with the lower part of the roving false-twisting and untwisting device and enters the roving carding and converging device. The contact part of the roving false twisting and untwisting device forms the second false twisting and untwisting working surface, and the roving carding and converging device 4 includes an upper arc-shaped mouth and a lower arc-shaped mouth, both of which are concave Arc-shaped structure, the diameter of the circle where the upper arc-shaped mouth is located is greater than the diameter of the circle where the lower arc-shaped mouth is located, the arc of the upper arc-shaped mouth is the same as that of the lower arc-shaped mouth, and the upper arc-shaped mouth and the lower arc-shaped mouth are connected through the bottom arc surface Connection, on the upward side of the upper arc mouth, bar-shaped teeth 5 are evenly arranged, the bottom arc surface of the roving carding and converging device is fixedly connected with the guide rod, and the left end and right end of the guide rod respectively pass through the left rotation device and the right The rotating device is fixed on the left and right sides of the spinning frame. The left rotating device and the right rotating device are jointly driven by the second motor to rotate. The upper arc opening of the roving carding and converging device is close to the lower part of the roving false twisting and untwisting device.

During spinning, the first roving 1 and the second roving 2, which have different raw materials, the same twist, and opposite twist directions, are fed through the first roving bobbin and the second roving bobbin placed on the yarn guide frame after being unwound, and the second motor drives The left rotation device and the right rotation device rotate together so that the bar-shaped teeth of the upper arc-shaped mouth of the roving carding and converging device 4 do not contact the first roving 1 and the second roving 2, while the first roving and the second roving on the touch screen Input the twist and twist direction of the first roving and the second roving fed into the twist input interface, and then the programmable logic controller calculates the speed of the roving false twisting and untwisting device according to the input twist, and obtains the twist direction of the roving according to the input twist direction. For the direction of rotation of the false twisting and untwisting device 3, the programmable logic controller controls the rotation of the first servo motor according to the obtained rotational speed and direction, and then drives the roving false twisting and untwisting device 3 to rotate around the spinning frame, and the fed first roving 1 Contact with the upper part of the roving false-twisting and untwisting device 3, contact the first roving on the first false-twisting and untwisting working surface, and drive the first roving located on the upper part of the first false-twisting and untwisting working surface due to the friction between the two Generate the rotation in the same direction as that of the roving false twisting and untwisting device, and then generate the first untwisting twist to the first roving located on the upper part of the first false twisting and untwisting working surface, and the twist direction of the first untwisting twist is the same as that of the first roving The twist direction of the twist is opposite, and the first untwisting twist is the same as the twist of the first roving, so that the first roving located on the upper part of the first false twisting and untwisting working surface has an untwisting effect, so that the first roving 1 The fibers are in a fiber-like dispersed state, and at the same time, the first twisting twist is generated on the first roving 1 located at the lower part of the first false twisting and untwisting working surface, and the twisting direction of the first twisting twist is the same as the twisting direction of the first roving The same, the size of the first twisting twist is the same as the twist of the first roving, the second roving 2 fed in is in contact with the lower part of the roving false twisting and untwisting device 3, and the second false twisting and untwisting working surface is in contact with the second roving Contact and due to the friction between the two, the second roving located on the upper part of the second false-twisting and untwisting working surface is driven to rotate in the opposite direction to the rotation direction of the roving false-twisting and untwisting device, and then rotates against the second false-twisting and untwisting working surface. The second roving at the top produces a second untwisting twist, and the twisting direction of the second untwisting twist is opposite to the twisting direction of the second roving, and the second untwisting twist is the same as the twist of the second roving. The second roving on the upper part of the second false twisting and untwisting working surface produces an untwisting effect, so that the fibers in the second roving 2 are in a fiber-like dispersed state, and at the same time, the second roving located at the lower part of the second false twisting and untwisting working surface The second twist twist is generated, and the twist direction of the second twist twist is the same as that of the second roving, and the size of the second twist twist is the same as that of the second roving. When the first servo motor starts to work The second motor drives the left rotating device and the right rotating device to rotate together so that the bar-shaped teeth of the upper arc-shaped mouth of the roving carding and converging device are in contact with the first roving 1 and the second roving 2, and the roving false twisting and untwisting device When untwisting the first roving on the top of the first false-twisting untwisting working surface and the second roving on the top of the second false-twisting and untwisting working surface, the two are brought together at the same time, so that the fiber-like dispersion The fibers in the first roving 1 and the second roving 2 in the state are mixed with each other, and the mixed fibers continue to move downwards, before being affected by the first twisting degree and the second twisting twisting degree, they are separated by the roving carding and converging device The bar-shaped tooth 5 of the upper arc-shaped opening of 4 is divided into 3-8 fiber bundles, and each fiber bundle contains fibers in the first roving and the second roving, and then the fibers in the first roving of each fiber bundle The fibers in the fiber and the second roving recover to the twist of the first roving 1 and the second roving 2 under the action of the first twist twist and the second twist twist respectively, and because the twist of the first roving and the second roving are the same But the twist direction is opposite, so that each fiber bundle is in an untwisted state, so that the fibers in the first roving and the fibers in the second roving in each fiber bundle are more fully mixed, and then each fiber bundle is divided along the roving. The arc at the bottom of the combing and converging device moves downwards. During this process, due to the reduction of the caliber of the roving carding and converging device 4, the fiber bundles are mixed with each other, so that the output and output of the lower arc of the roving carding and converging device are seamless. Twisted roving 6, the main motor drives the front roller to rotate, and then drives the front top roller to rotate synchronously, the front roller rotates and then drives the middle roller to rotate through the first gear, and then drives the middle top roller to rotate synchronously, the middle roller rotates and then drives the rear through the second gear The roller rotates, and then drives the rear top roller to rotate synchronously. The roving first enters the rear roller pair, and then enters the middle roller pair 7, and is drafted by the rear drafting zone formed between the rear roller pair 7 and the middle roller pair 8. Then enter the front roller pair 9, and be subjected to the drafting action of the front drafting zone formed between the middle roller pair 8 and the front roller pair 9, to obtain a mixed fiber strand with a weak twist, and the mixed fiber strand is under the effect of the twist of the spun yarn Twisted to obtain the final blended yarn.

Claims (2)

1. a kind of mixed yarn process units, including rove feeding mixing arrangement and mixing roving-drafting device, it is characterized in that：It is described Mixing roving-drafting device includes front roller that front roller and front leather roller form to, middle roller and the middle roller of medium rubber roller composition To, rear roller and the rear roller pair of rear roller composition, the front roller is driven by main motor and rotated, the middle roller and front roller Between be connected by first gear, be connected between the rear roller and middle roller by second gear, the mixing The effect of roving-drafting device is to obtain the non-twist mixing rove by rove feeding mixing arrangement output with weak twist through drawing-off Composite fibre yarn, rove feeding mixing arrangement includes rove false twisting untwisting device and rove point comb converging device, institute It is bar shaped band structure to state rove false twisting untwisting device, and the rove false twisting untwisting device is fixed on the car of spinning frame by assembly pulley On table top, the rove false twisting untwisting device surround spinning frame one week, and the rove false twisting untwisting device surround spinning frame Front truck table top and rear car table top, the rove false twisting untwisting device are driven by the first servomotor and rotated, first servo Motor is connected with programmable logic controller (PLC), and the programmable logic controller (PLC) is connected with touch-screen, is set in the touch-screen There are the first rove of feeding and the twist inputting interface of the second rove, the first rove and the second rove are placed on yarn guide Fed after first rove cylinder and the unwinding of the second rove cylinder, wherein the twist of the first rove and the second rove is identical but twist direction phase Instead, the first rove of feeding is with entering rove point comb converging device, the first rove after the upper contact of rove false twisting untwisting device The first false twisting backtwisting working face, the second rove and the rove false twisting solution of feeding are formed with the contact portion of rove false twisting untwisting device Enter rove point comb converging device, the contact portion shape of the second rove and rove false twisting untwisting device after the lower contacts of twist device Into the second false twisting backtwisting working face, the rove point comb converging device includes upper arc port and arc lower mouth, the upper arc port It is the arcuate structure of indent with arc lower mouth, circle is straight where diameter of a circle where the upper arc port is more than arc lower mouth Footpath, the radian of the upper arc port is identical with the radian of arc lower mouth, and the upper arc port and arc lower mouth pass through bottom cambered surface It is connected, it is evenly distributed on the side upward of arc port on described to have bar shaped tooth, the bottom of the rove point comb converging device Portion's cambered surface is fixedly connected with guide rod, and the left end and right-hand member of the guide rod are fixed on by left rotation device and dextrorotation rotary device respectively The left side and right side of spinning frame, the left rotation device and dextrorotation rotary device rotate commonly through the second motor driven, described thick The upper arc port of yarn point comb converging device abuts the bottom of rove false twisting untwisting device.

2. a kind of a kind of mixed yarn production method of mixed yarn process units based on described in claim 1, it is characterized in that：Spinning When, raw material is different, the twist is identical, twist direction is opposite the first rove and the second rove are placed on the first rove cylinder on yarn guide Fed after being unwind with the second rove cylinder, rotation causes rove point comb jointly for the second motor driven left rotation device and dextrorotation rotary device The bar shaped tooth of the upper arc port of converging device does not contact with the first rove and the second rove, at the same touch-screen the first rove and The first rove of feeding and the twist and twist direction of the second rove are inputted in the twist inputting interface of second rove, then may be programmed and patrol Controller is collected to calculate the rotating speed of rove false twisting untwisting device according to the twist of input, draw rove false twisting according to the twist direction of input The rotation direction of untwisting device, programmable logic controller (PLC) rotate according to the servomotor of rotating speed and course changing control first drawn, Then rove false twisting untwisting device is driven to be rotated around spinning frame, the first rove of feeding and the top of rove false twisting untwisting device Contact, contacted in the first false twisting backtwisting working face with the first rove and because rubbing action between the two is driven positioned at the first vacation The the first rove generation for twisting with the fingers backtwisting working face top rotates with rove false twisting untwisting device rotation direction identical, is then pointed to First rove on the first false twisting backtwisting working face top produces the first backtwisting twist, and the twist direction of the first backtwisting twist and first thick The twist twist direction of yarn is opposite, the size of the first backtwisting twist is identical with the twist size of the first rove, false so as to be pointed to first The first rove for twisting with the fingers backtwisting working face top produces backtwisting effect, so that the fiber in the first rove is in point of threadiness Bulk state, while the first rove for being pointed to the first false twisting backtwisting working face bottom produces the first twisting twist, and the first twisting The twist direction of the twist is identical with the twist twist direction of the first rove, the size and the twist size phase of the first rove of the first twisting twist Together, the lower contacts of the second rove of feeding and rove false twisting untwisting device, in the second false twisting backtwisting working face and the second rove Contact and because second rove of the rubbing action drive positioned at the second false twisting backtwisting working face top between the two produces and thick The opposite rotation of yarn false twisting untwisting device rotation direction, then it is pointed to the second rove production on the second false twisting backtwisting working face top The raw second backtwisting twist, and the twist direction of the second backtwisting twist is opposite with the twist twist direction of the second rove, the second backtwisting twist big It is small identical with the twist size of the second rove, produce backtwisting so as to be pointed to second rove on the second false twisting backtwisting working face top Effect, so that the fiber in the second rove is in the dispersity of threadiness, while it is pointed to the work of the second false twisting backtwisting Second rove of face bottom produces the second twisting twist, and the twist direction and the twist twist direction phase of the second rove of the second twisting twist Identical with the twist size of the second rove with the size of, the second twisting twist, when the first servomotor is started working, second is electric Machine drive left rotation device and dextrorotation rotary device jointly rotation cause rove point comb converging device upper arc port bar shaped tooth with First rove and the second rove are in contact, and rove false twisting untwisting device is being pointed to the first of the first false twisting backtwisting working face top When rove and the second rove progress backtwisting positioned at the second false twisting backtwisting working face top, while both are made toward drawing close together Obtain in threadiness dispersity the first rove and the second rove in fiber be mutually mixed, mixed fiber continue to Lower motion, by the upper arc of rove point comb converging device before the effect of the first twisting twist and the second twisting twist is also not affected by The bar shaped tooth of shape mouth is divided into 3-8 fibre bundle, and the fiber in the first rove and the second rove is included in each fibre bundle, Then the twisting twist of fiber difference first in the fiber and the second rove in the first rove of each fibre bundle and the second twisting Twist when the first rove and the second rove is returned in the presence of the twist, and due to the twist phase of the first rove and the second rove Same but twist direction is opposite so that each fibre bundle is untwisted state, so as to realize the fibre in the first rove in each fibre bundle Fiber in the rove of peacekeeping second more fully mixes, then bottom cambered surface of each fibre bundle along rove point comb converging device Move downward, due to the reduction of rove point comb converging device bore during this so that it is mutually mixed between each fibre bundle, so as to Go out output in the arc lower mouth of rove point comb converging device and obtain roving, main motor drives front roller to rotate, then driven Front leather roller synchronous axial system, front roller rotates then drives middle roller to rotate by first gear, then drives medium rubber roller synchronously to turn Dynamic, middle roller rotates then drives rear roller to rotate by second gear, roller synchronous axial system after then driving, and roving is first Rear roller pair is introduced into, then into middle roller pair, is led by the first break draft area formed between rear roller pair and middle roller pair The effect of stretching, then into front roller pair, acted on, obtain by the drawing-off of the front draft zone formed between middle roller pair and front roller pair To the composite fibre yarn with weak twist, composite fibre yarn is twisted to obtain final blending in the presence of ramie yarn twist Yarn.