CN110042520A - Wash/glue the production method of environmentally friendly mixed yarn - Google Patents

Abstract

The invention discloses a production method of polyester/viscose environment-friendly blended yarn. According to the method of the invention, viscose fiber and polyester fiber are separately opened and cleaned to obtain viscose roll and polyester roll, which are jointly fed to a carding machine to obtain Polyester/viscose mixed sliver, so as to realize the continuous carding and mixing of viscose fiber and polyester fiber into sliver in one carding process. The required viscose environmentally friendly blended yarn, thereby increasing the production efficiency of the blended yarn, while improving the mixing effect.

Description

Production method of polyester/viscose environment-friendly blended yarn

technical field

The invention belongs to the technical field of textiles, and relates to a spinning method of a novel yarn, in particular to a production method of a polyester/viscose environment-friendly blended yarn.

Background technique

With the development of social economy and the continuous improvement of people's living standards, for apparel textiles, in addition to the pursuit of wearing comfort, more and more attention is paid to their fashion and functionality, and the pursuit of unique styles and various functions, such as antibacterial , Anti-static and other functions. In order to meet this demand of consumers, it has become an important task for the textile industry to continuously develop new yarns and fabrics. With the development of science and technology, the competition in the textile market is becoming more and more fierce. In order to maximize profits, various manufacturers continue to develop in the direction of high-grade, high-grade, good technical content and high added value.

In view of this, the present invention provides a production method of polyester/viscose environment-friendly blended yarn. The rolls are jointly fed to the carding machine to obtain the polyester/viscose mixed sliver, wherein the carding machine includes left and right cotton feeding-licker feeding devices and left and right cylinder-flat carding devices and doffer- The pressure roller presses the sliver device, and the viscose roll and polyester roll enter the carding machine from the left and right cotton-licker-in feeding devices respectively, and then realize carding and Impurities are removed, and then the viscose fiber on the left cylinder in the left cylinder-flat card opening device and the polyester fiber on the right cylinder in the right cylinder-flat card opening device are jointly treated by the doffer- The doffer in the sliver-forming device is pressed by the pressure roller, and then the doffer is peeled off by the large pressure roller, and then output into a sliver by the coiler to obtain a polyester/viscose mixed sliver, so as to realize the carding of viscose fiber and polyester fiber in one carding process. and continuous mixing into sliver, the obtained polyester/viscose mixed sliver goes through two processes of drawing, roving and spinning to obtain the required viscose environment-friendly blended yarn, thereby improving the production efficiency of the blended yarn and improving the mixed effect.

SUMMARY OF THE INVENTION

Technical problem to be solved: in order to overcome the deficiencies of the prior art, the method of the present invention separates viscose fibers and polyester fibers to obtain viscose rolls and polyester rolls through respective opening and cleaning, and feed them to a carding machine to obtain polyester/polyester fibers. The viscose fiber and polyester fiber are combed and mixed into a continuous sliver in one carding process, and the obtained polyester/viscose mixed sliver is successively obtained through two processes of drawing, roving and spinning. The viscose environmentally friendly blended yarn can improve the production efficiency of the blended yarn and improve the mixing effect at the same time.

Technical scheme: The production method of polyester/viscose environmentally friendly blended yarn, viscose fiber and polyester fiber are respectively opened and cleaned to make viscose roll and polyester roll, and then the viscose roll and polyester roll are fed into the comb together. The cotton machine produces polyester/viscose mixed sliver, wherein the carding machine includes left and right cotton feeding-licker-in feeding devices and left and right cylinder-flat carding devices and doffer-pressing roller pressing device into sliver. , the viscose roll and polyester roll enter the carding machine from the left and right cotton-licker-in feeding devices respectively, and then carding and impurity removal are realized in the left and right cylinder-flat carding devices respectively, and then the left tin The viscose fiber on the left cylinder in the cylinder-flat opening device and the polyester fiber on the right cylinder in the right cylinder-flat opening device are jointly pressed by the doffer-press roller into a sliver device The doffer in the middle is peeled off after being pressed by a large pressure roller, and then output into strips by a coiler to make polyester/viscose mixed strips, so as to realize the continuous carding and mixing of viscose fibers and polyester fibers into strips in one carding process. The obtained polyester/viscose mixed sliver is sequentially subjected to two drawing, roving and spinning processes to obtain the required polyester/viscose environment-friendly blended yarn, including the following steps:

The first step: cotton matching: choose 33.73% 1.30dtex*38mm Lenzing environmentally friendly viscose fiber, 62.64% 1.56dtex*38mm polyester fiber, 1.82% polyester/viscose roving sliver, 1.81% polyester/viscose mixed sliver as raw material;

The second step: polyester cleaning, viscose cleaning: for viscose cleaning, because the viscose fiber has good length uniformity, soft and smooth, fluffy, less impurities, and excessive tumbling and excessive blowing will Causes the increase of neps at the rear, so the cleaning process should adopt the process principle of "frequently grasping and less grasping, using carding instead of punching, more carding and less falling", and the viscose fiber is sequentially grasped by the disc type cotton picker according to the mixing ratio. Viscose rolls are obtained by taking, opening and removing impurities and uniform mixing by multi-silo cotton blender, opening and removing impurities by porcupine type cotton opener, and uniformly rolling by roll forming machine. To ensure that the amount of cotton grasped by each tooth of the cotton-picking beater blade of the disc-type cotton-grabbing machine is small. It achieves a better mixing effect. For the cleaning machine, the feeding viscose fiber relies on the mechanical part between the beater and the dust bar to complete the opening and removal of impurities;

For polyester opening and cleaning, the polyester fibers are sequentially grasped by the disc-type cotton picker according to the mixing ratio, the opening and impurity removal and uniform mixing of the multi-silo cotton mixer, and the opening and impurity removal of the porcupine type cotton opener. , The polyester roll is made by the uniform roll of the rolling machine. For the cotton catching machine, according to the principle of fine cotton catching, it is ensured that the catching amount of each tooth of the cotton catching beater blade of the disc catching machine is small. For mixed cotton According to the principle of full mixing, the capacity of the multi-silo cotton blender is increased, and the delay time is increased to achieve a better mixing effect. The mechanical part is used to complete the functions of opening and impurity removal. The speed of the beater is 540r/min, the rotation speed of the feeding roller is 40r/min, the distance between the beater and the feeding roller is 6.5mm, the distance between the beater and the dust rod is 12mm at the inlet, and the distance between the outlet is 12mm. The distance between the dust sticks is 16.5mm, the distance between the dust rods is 13mm at the inlet, the middle group is 8mm, and the outlet is 5.5mm, and the distance between the beater and the cotton stripper is 1.6mm;

The third step: Carding: the viscose roll and polyester roll obtained in the second step are fed into the carding machine to obtain polyester/viscous sliver, and the carding machine includes the left feeder-licker-in rollers arranged in parallel. Feeding device, right feeder-licker feeding device, left cylinder-flat plate opening device, right cylinder-flat plate opening device, doffer-pressing roll forming device, left cotton feeder-licker-in feeding device The structure of the device and the right cotton-licker-in feeding device are exactly the same, and the left and right are arranged in parallel in the carding machine. The cotton feeding part and the licker-in opening part, wherein the cotton feeding part includes a feeding box, a lap roller, a feeding roller, and a feeding plate. The feeding plate is located at the lower part of the outer circumference of the feeding roller, and the viscose roll The cotton feeding part of the left cotton feeding-licker-in feeding device is fed to the carding machine, and the polyester roll is fed to the carding machine from the cotton feeding part of the right cotton feeding-licker-in feeding device. The viscose roll or polyester roll placed in the cotton feeding box is first driven and fed by the uniform pressing of the cotton roll roller, and then enters between the cotton feeding roller and the cotton feeding board to be held. At this time, the viscose that is held and pressed The roll or polyester roll is output in the state of polyester viscose fiber layer or polyester fiber layer driven by the rotation of the feeding roller. The opening part of the licker-in roll includes a licker-in roll, and the outer circumference of the licker-in roll is provided with a dust-removing knife and a small leakage bottom. The fibers in the polyester-viscose fiber layer or the polyester fiber layer output between the cotton-feeding roller and the cotton-feeding plate are continuously stripped by the rotating licker-in roller, so as to complete the fiber from the cotton-feeding part to the opening part of the licker-in roller. In the transfer process, the initial grip and carding of the fiber layer is realized during the process of the licker-in roller rotating and stripping the fibers. In this process, the tail end of the cotton bundle is firmly held by the feeding roller and the feeding plate, and the head end is pierced by the licker-in roller. Splitting to complete the carding of the fiber layer, and then the teeth on the licker-in roll and the fibers produce relative slip and friction, so that the fibers in the fiber layer are straightened and separated laterally, completing the carding of the fiber layer, and finally with the subsequent feeding of the fiber layer. Give, the grip on the end of the same fiber layer is gradually weakened, the sawtooth on the licker-in roller grabs the fiber layer, and the decomposition of the fiber layer is completed. At this time, due to the high-speed rotation of the licker-in roller, a layer of air flow is driven on the surface of the licker-in roller due to friction, and due to the viscosity and friction of air molecules, the inner layer of air drives the outer layer of air, layer by layer. At this time, the impurities in the fiber layer are in the outer layer of the air flow layer, and the fibers in the fiber layer are in the inner layer of the air flow layer, so that the cotton feeding board, dust removal knife, small leakage The impurities and short fibers in the fiber layer are removed in the area where the bottom meets. During this process, a first drop zone is formed between the distance between the feeding board and the licker-in and the distance between the dust-removing knife and the licker-in. A second drop zone is formed between the distance between the dust removal knife and the licker-in roller to the opening of the carding plate or the inlet of the small drain bottom, and a small amount of large impurities and most small impurities are dropped, and the third drop zone is formed between the inlet of the small drain bottom and the outlet of the small drain bottom. Miscellaneous areas, lint and dust;

The left cylinder-flat opening device and the right cylinder-flat opening device have the same structure and are arranged in parallel left and right in the carding machine. - The cover plate opening device includes a cylinder, and the outer circumference of the cylinder is provided with a cover plate, a front fixed cover, a rear fixed cover, a front cover, a rear cover, and a large drain bottom, which are rotated and output by the licker-in roller The polyester viscose fiber layer or the fibers in the polyester fiber layer are continuously stripped by the rotating cylinder, so as to complete the transfer process of the fibers from the cotton-licker-in feeding device to the cylinder-cover carding device. In the process of rotating and stripping the fibers, the free carding of the fiber layer is realized. In this process, the free carding process of the fibers is realized under the action of the double needle surface of the teeth on the surface of the cylinder and the teeth on the surface of the licker-in. The different structures of the saw teeth on the forest surface and the saw teeth on the licker-in surface make the two needle surfaces different in their ability to grasp fibers. The needle surface with strong fiber grasping ability holds the fiber, and the needle surface with weak grasping ability slides relative to the fiber, thereby Realize the effect of straightening and combing the fibers, and then with the continuous change of the grasping ability of the two needle surfaces, the fiber holding and carding change, the fibers are transferred between the two needle surfaces, and the stripped fiber layer immediately enters the The cylinder-cover plate opening device rotates with the rotation of the cylinder. At this time, the incoming fibers are carefully carded between the cylinder and the cover plate, thereby decomposing the fiber layer, realizing the separation of fibers, projecting impurities, front and rear. The cover plate and the large leak bottom prevent the fibers from scattering, remove the impurity short pile, and fix the cover plate to assist in the carding and finishing of the fibers;

The doffer-pressing roll forming device includes a doffer, and a stripping roller, a large pressing roller and a sliver are arranged in sequence at the front of the doffer. The doffer is arranged on the left cylinder-cover opening device and the right cylinder-cover. The front part of the opening device, and the left end of the doffer is aligned with the left end of the cylinder of the left cylinder-cover opening device, and the right end of the doffer is aligned with the right end of the cylinder of the right cylinder-cover opening device, this At the same time of the time carding, the doffer will condense the viscose fiber on the cylinder needle surface of the left cylinder-cover opening device and the polyester fiber on the cylinder needle surface of the right cylinder-cover opening device together into a polyester/viscose fiber layer. At this time, different ratios of viscose fiber and polyester fiber can be grasped by different doffers through the rotation speed control of the cylinder of the left cylinder-cover opening device and the cylinder of the right cylinder-cover opening device, so as to realize Control of the different blending ratios of viscose fiber and polyester fiber in the blended yarn, so as to complete the fiber transfer on the fast cylinder area and condense to a unit area of the slow doffer, so as to complete the fiber carding from the cylinder-cover plate The transfer process of the device to the doffer-pressing roller to press into the sliver device, the polyester/viscose fiber layer condensed on the doffer is then continuously stripped by the stripping roller, and the structure and uniformity are maintained during the stripping process, thereby forming polyester/viscose fiber layers. Viscose fiber web, the polyester/viscose fiber web is gathered and pressed into strips by a large pressure roller, and is continuously wound on the can by a coiler;

The fourth step; draw frame: the polyester/viscose raw sliver obtained in the third step is drawn through two passes to obtain a polyester/viscose cooked sliver, and 8 polyester/viscose slivers obtained in the third step are used in the first draw frame. The raw sliver is fed together, and the polyester/viscose semi-cooked sliver is obtained by the first drawing frame drawing, thinning and recombination. The drafting system adopts the three-up and three-down pressure bar attached to the upper roller curve for drawing. In the second drawing frame, 8 polyester/viscose semi-cooked slivers are used to feed together, and the viscose sliver is obtained through the drawing, thinning and re-combination of the second drawing frame. The drafting system adopts four upper Four down-pressing pressure rods with double-zone curve drafting on guide and upper rollers;

Step 5: Roving: Feed 1 polyester/viscose sliver obtained in the fourth step into the roving frame, and the polyester/viscose roving is obtained by drawing, drawing, twisting and winding on the roving frame. According to the process principle of "large gauge, large twist", the quantitative roving is lightly controlled to meet the requirements of the chemical fiber blending process. Due to the good uniformity of the chemical fiber and the large friction factor, a large gauge and a small draft ratio in the rear area are used to control, It is beneficial to the smooth drafting of the whiskers and the improvement of the evenness of the strips;

Step 6: Spinning: The polyester/viscose roving obtained in the fourth step is fed into the spinning frame, and the polyester/viscose environment-friendly blended yarn is obtained by drawing, drawing, twisting and winding on the spinning frame. The spinning process is mainly The purpose is to improve the quality of the spun yarn. The focus should be on increasing the total draft ratio of the spinning frame, and strengthening the control of the floating fibers in the front area. The technical principle of collar and light traveler, the front area adopts tight gauge and strong pressure, which helps to form evenness with excellent performance.

Preferably, in the second step, the disc type cotton picker used is the FA002A type.

Preferably, in the second step, the multi-silo cotton blender used is the A035 type.

Preferably, in the second step, the adopted porcupine opener is A036 type.

Preferably, in the second step, the rolling machine used is A076.

Preferably, in the second step, for the disc type cotton picker in the viscose opening and cleaning process, set the distance that the beater blade extends out of the rib to 2.82mm, the intermittent drop distance of the cotton picker beater to 3.2mm, and the running speed of the cotton picker trolley. 23m/min, the speed of the cotton picker is 945r/min.

Preferably, in the second step, for the cotton blender in the viscose opening and cleaning, set the changing pressure 218, the opening beater speed 975r/min, the cotton feeding roller speed 0.25r/min, the cotton feeding fan speed 1510r/min min.

Preferably, in the second step, for the cleaning machine in the viscose cleaning process, the beater speed is set to 545r/min, the rotation speed of the feeding roller is 40r/min, the distance between the beater and the feeding roller is 6.5mm, and the distance between the beater and the dust stick is 6.5mm. The distance between the inlet and the outlet is 12mm, and the distance between the outlet is 16.5mm. The distance between the dust rods is 13mm at the inlet, 8mm in the middle and 5.5mm at the outlet. The distance between the beater and the stripper is 1.8mm.

Preferably, in the second step, for the disc type cotton picker in the polyester opening and cleaning process, set the distance that the beater blade extends out of the rib to 2.75mm, the intermittent drop distance of the cotton picker beater is 3.25mm, and the running speed of the cotton picker trolley is 23.5 mm. m/min, the rotation speed of the cotton picker is 950r/min.

Preferably, in the second step, for the cotton blender in the polyester opening and cleaning process, set the changing pressure to 220, the speed of the opening beater to 980r/min, the speed of the feeding roller to 0.23r/min, and the speed of the feeding fan to 1500r/min. .

Beneficial effect: the method of the present invention separates viscose fiber and polyester fiber to obtain viscose rolls and polyester rolls through respective opening and cleaning, and feed them to the carding machine to obtain polyester/viscose mixed sliver, so that in a carding process Realize the continuity of carding and mixing of viscose fiber and polyester fiber into sliver, and the obtained polyester/viscose mixed sliver goes through two processes of drawing, roving and spinning in turn to obtain the required viscose environment-friendly blended yarn, thereby improving the efficiency of the process. The production efficiency of blended yarns, while improving the mixing effect.

Detailed ways

The following examples further illustrate the content of the present invention, but should not be construed as limiting the present invention. Modifications and substitutions made to the methods, steps or conditions of the present invention without departing from the spirit and essence of the present invention all belong to the scope of the present invention. Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art.

Example 1

Taking the preparation of polyester/viscose environmentally friendly blended yarn with a linear density of 21 ^S and a blending ratio of T65/R35 as an example, the corresponding process parameters are as follows:

(1) Raw material selection

(2) Design of key process parameters

Open and clean cotton:

Carding:

Draw:

Roving:

Spinning yarn:

Claims (10)

1. the production method of polyester/viscose environment-friendly blended yarn, it is characterized in that, viscose fiber and polyester fiber are respectively made viscose roll and polyester roll through respective opening and cleaning, and then viscose roll and polyester roll are fed together The polyester/viscose mixed sliver is obtained by feeding into the carding machine, wherein the carding machine includes left and right cotton feeding-licker-in feeding devices and left and right cylinder-flat carding devices and doffer-pressing rollers arranged in parallel Sliver forming device, viscose rolls and polyester rolls enter the carding machine from the left and right cotton-licker-in feeding devices, respectively, and then realize carding and impurity removal in the left and right cylinder-flat carding devices respectively. Then the viscose fiber on the left cylinder in the left cylinder-flat card opening device and the polyester fiber on the right cylinder in the right cylinder cylinder-flat card opening device are jointly pressed by the doffer-press roller The doffer in the sliver forming device is peeled off and then pressed by a large pressure roller, and then output into a sliver by a coiler to obtain a polyester/viscose mixed sliver, so as to realize the carding and mixing of viscose fiber and polyester fiber in one carding process. The sliver is continuous, and the obtained polyester/viscose mixed sliver is sequentially subjected to two drawing, roving and spinning processes to obtain the required polyester/viscose environmentally friendly blended yarn, including the following steps: The first step: cotton matching: choose 33.73% 1.30dtex*38mm Lenzing environmentally friendly viscose fiber, 62.64% 1.56dtex*38mm polyester fiber, 1.82% polyester/viscose roving sliver, 1.81% polyester/viscose mixed sliver as raw material; The second step: polyester cleaning, viscose cleaning: for viscose cleaning, because the viscose fiber has good length uniformity, soft and smooth, fluffy, less impurities, and excessive tumbling and excessive blowing will Causes the increase of neps at the rear, so the cleaning process should adopt the process principle of "frequently grasping and less grasping, using carding instead of punching, more carding and less falling", and the viscose fiber is sequentially grasped by the disc type cotton picker according to the mixing ratio. Viscose rolls are obtained by taking, opening and removing impurities and uniform mixing by multi-silo cotton blender, opening and removing impurities by porcupine type cotton opener, and uniformly rolling by roll forming machine. To ensure that the amount of cotton grasped by each tooth of the cotton-picking beater blade of the disc-type cotton-grabbing machine is small. It achieves a better mixing effect. For the cleaning machine, the feeding viscose fiber relies on the mechanical part between the beater and the dust bar to complete the opening and removal of impurities; For polyester opening and cleaning, the polyester fibers are sequentially grasped by the disc-type cotton picker according to the mixing ratio, the opening and impurity removal and uniform mixing of the multi-silo cotton mixer, and the opening and impurity removal of the porcupine type cotton opener. , The polyester roll is made by the uniform roll of the rolling machine. For the cotton catching machine, according to the principle of fine cotton catching, it is ensured that the catching amount of each tooth of the cotton catching beater blade of the disc catching machine is small. For mixed cotton According to the principle of full mixing, the capacity of the multi-silo cotton blender is increased, and the delay time is increased to achieve a better mixing effect. The mechanical part is used to complete the functions of opening and impurity removal. The speed of the beater is 540r/min, the rotation speed of the feeding roller is 40r/min, the distance between the beater and the feeding roller is 6.5mm, the distance between the beater and the dust rod is 12mm at the inlet, and the distance between the outlet is 12mm. The distance between the dust sticks is 16.5mm, the distance between the dust rods is 13mm at the inlet, the middle group is 8mm, and the outlet is 5.5mm, and the distance between the beater and the cotton stripper is 1.6mm; The third step: Carding: the viscose roll and polyester roll obtained in the second step are fed into the carding machine to obtain polyester/viscous sliver, and the carding machine includes the left feeder-licker-in rollers arranged in parallel. Feeding device, right feeder-licker feeding device, left cylinder-flat plate opening device, right cylinder-flat plate opening device, doffer-pressing roll forming device, left cotton feeder-licker-in feeding device The structure of the device and the right cotton-licker-in feeding device are exactly the same, and the left and right are arranged in parallel in the carding machine. The cotton feeding part and the licker-in opening part, wherein the cotton feeding part includes a feeding box, a lap roller, a feeding roller, and a feeding plate. The feeding plate is located at the lower part of the outer circumference of the feeding roller, and the viscose roll The cotton feeding part of the left cotton feeding-licker-in feeding device is fed to the carding machine, and the polyester roll is fed to the carding machine from the cotton feeding part of the right cotton feeding-licker-in feeding device. The viscose roll or polyester roll placed in the cotton feeding box is first driven and fed by the uniform pressing of the cotton roll roller, and then enters between the cotton feeding roller and the cotton feeding board to be held. At this time, the viscose that is held and pressed The roll or polyester roll is output in the state of polyester viscose fiber layer or polyester fiber layer driven by the rotation of the feeding roller. The opening part of the licker-in roll includes a licker-in roll, and the outer circumference of the licker-in roll is provided with a dust-removing knife and a small leakage bottom. The fibers in the polyester-viscose fiber layer or the polyester fiber layer output between the cotton-feeding roller and the cotton-feeding plate are continuously stripped by the rotating licker-in roller, so as to complete the fiber from the cotton-feeding part to the opening part of the licker-in roller. In the transfer process, the initial grip and carding of the fiber layer is realized during the process of the licker-in roller rotating and stripping the fibers. In this process, the tail end of the cotton bundle is firmly held by the feeding roller and the feeding plate, and the head end is pierced by the licker-in roller. Splitting to complete the carding of the fiber layer, and then the teeth on the licker-in roll and the fibers produce relative slip and friction, so that the fibers in the fiber layer are straightened and separated laterally, completing the carding of the fiber layer, and finally with the subsequent feeding of the fiber layer. Give, the grip on the end of the same fiber layer is gradually weakened, the sawtooth on the licker-in roller grabs the fiber layer, and the decomposition of the fiber layer is completed. At this time, due to the high-speed rotation of the licker-in roller, a layer of air flow is driven on the surface of the licker-in roller due to friction, and due to the viscosity and friction of air molecules, the inner layer of air drives the outer layer of air, layer by layer. At this time, the impurities in the fiber layer are in the outer layer of the air flow layer, and the fibers in the fiber layer are in the inner layer of the air flow layer, so that the cotton feeding board, dust removal knife, small leakage The impurities and short fibers in the fiber layer are removed in the area where the bottom meets. During this process, a first drop zone is formed between the distance between the feeding board and the licker-in and the distance between the dust-removing knife and the licker-in. A second drop zone is formed between the distance between the dust removal knife and the licker-in roller to the opening of the carding plate or the inlet of the small drain bottom, and a small amount of large impurities and most small impurities are dropped, and the third drop zone is formed between the inlet of the small drain bottom and the outlet of the small drain bottom. Miscellaneous areas, lint and dust; The left cylinder-flat opening device and the right cylinder-flat opening device have the same structure and are arranged in parallel left and right in the carding machine. - The cover plate opening device includes a cylinder, and the outer circumference of the cylinder is provided with a cover plate, a front fixed cover, a rear fixed cover, a front cover, a rear cover, and a large drain bottom, which are rotated and output by the licker-in roller The polyester viscose fiber layer or the fibers in the polyester fiber layer are continuously stripped by the rotating cylinder, so as to complete the transfer process of the fibers from the cotton-licker-in feeding device to the cylinder-cover carding device. In the process of rotating and stripping the fibers, the free carding of the fiber layer is realized. In this process, the free carding process of the fibers is realized under the action of the double needle surface of the teeth on the surface of the cylinder and the teeth on the surface of the licker-in. The different structures of the saw teeth on the forest surface and the saw teeth on the licker-in surface make the two needle surfaces different in their ability to grasp fibers. The needle surface with strong fiber grasping ability holds the fiber, and the needle surface with weak grasping ability slides relative to the fiber, thereby Realize the effect of straightening and combing the fibers, and then with the continuous change of the grasping ability of the two needle surfaces, the fiber holding and carding change, the fibers are transferred between the two needle surfaces, and the stripped fiber layer immediately enters the The cylinder-cover plate opening device rotates with the rotation of the cylinder. At this time, the incoming fibers are carefully carded between the cylinder and the cover plate, thereby decomposing the fiber layer, realizing the separation of fibers, projecting impurities, front and rear. The cover plate and the large leak bottom prevent the fibers from scattering, remove the impurity short pile, and fix the cover plate to assist in the carding and finishing of the fibers; The doffer-pressing roll forming device includes a doffer, and a stripping roller, a large pressing roller and a sliver are arranged in sequence at the front of the doffer. The doffer is arranged on the left cylinder-cover opening device and the right cylinder-cover. The front part of the opening device, and the left end of the doffer is aligned with the left end of the cylinder of the left cylinder-cover opening device, and the right end of the doffer is aligned with the right end of the cylinder of the right cylinder-cover opening device, this At the same time of the time carding, the doffer will condense the viscose fiber on the cylinder needle surface of the left cylinder-cover opening device and the polyester fiber on the cylinder needle surface of the right cylinder-cover opening device together into a polyester/viscose fiber layer. At this time, different ratios of viscose fiber and polyester fiber can be grasped by different doffers through the rotation speed control of the cylinder of the left cylinder-cover opening device and the cylinder of the right cylinder-cover opening device, so as to realize Control of the different blending ratios of viscose fiber and polyester fiber in the blended yarn, so as to complete the fiber transfer on the fast cylinder area and condense to a unit area of the slow doffer, so as to complete the fiber carding from the cylinder-cover plate The transfer process of the device to the doffer-pressing roller to press into the sliver device, the polyester/viscose fiber layer condensed on the doffer is then continuously stripped by the stripping roller, and the structure and uniformity are maintained during the stripping process, thereby forming polyester/viscose fiber layers. Viscose fiber web, the polyester/viscose fiber web is gathered and pressed into strips by a large pressure roller, and is continuously wound on the can by a coiler; The fourth step; draw frame: the polyester/viscose raw sliver obtained in the third step is drawn through two passes to obtain a polyester/viscose cooked sliver, and 8 polyester/viscose slivers obtained in the third step are used in the first draw frame. The raw sliver is fed together, and the polyester/viscose semi-cooked sliver is obtained by the first drawing frame drawing, thinning and recombination. The drafting system adopts the three-up and three-down pressure bar attached to the upper roller curve for drawing. In the second drawing frame, 8 polyester/viscose semi-cooked slivers are used to feed together, and the viscose sliver is obtained through the drawing, thinning and re-combination of the second drawing frame. The drafting system adopts four upper Four down-pressing pressure rods with double-zone curve drafting on guide and upper rollers; Step 5: Roving: Feed 1 polyester/viscose sliver obtained in the fourth step into the roving frame, and the polyester/viscose roving is obtained by drawing, drawing, twisting and winding on the roving frame. According to the process principle of "large gauge, large twist", the quantitative roving is lightly controlled to meet the requirements of the chemical fiber blending process. Due to the good uniformity of the chemical fiber and the large friction factor, a large gauge and a small draft ratio in the rear area are used to control, It is beneficial to the smooth drafting of the whiskers and the improvement of the evenness of the strips; Step 6: Spinning: The polyester/viscose roving obtained in the fourth step is fed into the spinning frame, and the polyester/viscose environment-friendly blended yarn is obtained by drawing, drawing, twisting and winding on the spinning frame. The spinning process is mainly The purpose is to improve the quality of the spun yarn. The focus should be on increasing the total draft ratio of the spinning frame, and strengthening the control of the floating fibers in the front area. The technical principle of collar and light traveler, the front area adopts tight gauge and strong pressure, which helps to form evenness with excellent performance. 2. the production method of polyester/viscose environment-friendly blended yarn according to claim 1, is characterized in that, in the second step, the disc type cotton grabber that adopts is FA002A type. 3. the production method of polyester/viscose environment-friendly blended yarn according to claim 1, is characterized in that, in the second step, the multi-silo cotton blender that adopts is A035 type. 4. the production method of polyester/viscose environment-friendly blended yarn according to claim 1, is characterized in that, in the second step, the porcupine type opener that adopts is A036 type. 5. the production method of polyester/viscose environment-friendly blended yarn according to claim 1, is characterized in that, in the second step, the rolling machine adopted is A076 type. 6. the production method of polyester/viscose environment-friendly blended yarn according to claim 1, is characterized in that, in the second step, for the disc-type cotton grabber in the viscose opening and cleaning, a beater blade is set to extend the rib The distance is 2.82mm, the intermittent falling distance of the cotton picker is 3.2mm, the running speed of the cotton picker trolley is 23m/min, and the rotation speed of the cotton picker is 945r/min. 7. the production method of polyester/viscose environment-friendly blended yarn according to claim 1, it is characterized in that, in the second step, for the viscose blender in the cotton cleaning, set the warehouse changing pressure 218, open the cotton beater The speed is 975r/min, the speed of the feeding roller is 0.25r/min, and the speed of the feeding fan is 1510r/min. 8. the production method of polyester/viscose environment-friendly blended yarn according to claim 1, is characterized in that, in the second step, for the cleaning machine in the viscose cleaning machine, set the beater speed 545r/min, and feed the cotton The roller speed is 40r/min, the distance between the beater and the feeding roller is 6.5mm, the distance between the beater and the dust rod is 12mm at the inlet, 16.5mm at the outlet, and the distance between the dust rods is 13mm at the inlet, 8mm in the middle and 8mm at the outlet. 5.5mm, the distance between the beater and the stripping knife is 1.8mm. 9. the production method of polyester/viscose environment-friendly blended yarn according to claim 1, is characterized in that, in the second step, for the disc type cotton catching machine in the polyester fiber opening and cleaning, set the beater blade to extend the rib. The distance is 2.75mm, the intermittent falling distance of the cotton picker is 3.25mm, the running speed of the cotton picker trolley is 23.5m/min, and the rotation speed of the cotton picker is 950r/min. 10. The production method of polyester/viscose environment-friendly blended yarn according to claim 1, characterized in that, in the second step, for the cotton blender in the polyester opening and cleaning, a warehouse changing pressure of 220 is set, and the opening beater rotation speed is set. 980r/min, the speed of the feeding roller is 0.23r/min, and the speed of the feeding fan is 1500r/min.