CN110699800A - Efficient viscose yarn production method - Google Patents
Efficient viscose yarn production method Download PDFInfo
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- CN110699800A CN110699800A CN201910993179.8A CN201910993179A CN110699800A CN 110699800 A CN110699800 A CN 110699800A CN 201910993179 A CN201910993179 A CN 201910993179A CN 110699800 A CN110699800 A CN 110699800A
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- viscose
- sliver
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- strips
- drafting
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
- D01G21/00—Combinations of machines, apparatus, or processes, e.g. for continuous processing
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H13/00—Other common constructional features, details or accessories
- D01H13/04—Guides for slivers, rovings, or yarns; Smoothing dies
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H13/00—Other common constructional features, details or accessories
- D01H13/32—Counting, measuring, recording or registering devices
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
- D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
- D01H5/22—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by rollers only
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
- D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
- D01H5/70—Constructional features of drafting elements
- D01H5/72—Fibre-condensing guides
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2201/00—Cellulose-based fibres, e.g. vegetable fibres
- D10B2201/20—Cellulose-derived artificial fibres
- D10B2201/22—Cellulose-derived artificial fibres made from cellulose solutions
- D10B2201/24—Viscose
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Abstract
The invention discloses a high-efficiency production method of viscose yarn, which comprises the steps of grabbing and primarily opening and mixing matched viscose fibers, viscose air suction flowers and roving ends through a disc type plucker, mixing and opening through a multi-bin cotton mixer, opening and removing impurities through a porcupine type opener, preparing uniform viscose rolls through a lap former, deeply opening, carding, removing impurities and forming into strips through a carding machine to prepare viscose strips, then realizing twice drawing of the viscose strips through a double-channel drawing frame to directly prepare viscose drawn strips, thereby obviously improving drawing efficiency, and then sequentially carrying out roving, spinning and spooling on the viscose drawn strips to prepare the required viscose yarn.
Description
Technical Field
The invention relates to the field of new textile technology, in particular to a high-efficiency production method of viscose yarns.
Background
Viscose yarn is a raw material of spinning clothes which is spun by a series of spinning processes of opening and picking, cotton carding, drawing, roving, spinning, spooling and the like of viscose fiber. Because the viscose yarn has smooth hand feeling, comfortable wearing, good moisture absorption and excellent spinnability, the viscose yarn is often blended and interwoven with cotton, wool or various synthetic fibers and is used for various clothes and decorative textiles.
Currently, the chinese textile industry is undergoing a critical period of transition from labor intensive to technology intensive, and intelligent, continuous textile production has become the hallmark and inevitable trend of modern textile mills. Among these, in order to reduce the influence of touch, friction, collision, and the like on the resultant yarn during the inter-operation-step conveyance of the semi-finished product, and the like, reduce labor and improve the work efficiency, the continuous production in the spinning line is a trend in the future.
Disclosure of Invention
The invention aims to provide an efficient viscose yarn production method.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a viscose yarn high-efficiency production method comprises the following steps:
the first step is as follows: cotton blending: selecting viscose fiber, and simultaneously adding less than 5% of viscose air-absorbing patterns and roving ends;
the second step is that: opening and picking: grabbing the selected viscose fibers by a disc type plucker in sequence according to a mixing proportion, mixing the fibers by a multi-bin cotton mixer, opening the fibers by a porcupine type opener, and making uniform viscose rolls by a lap former;
the third step: carding cotton: the viscose roll prepared in the second step is subjected to deep opening, carding, impurity removal and strip forming by a carding machine to prepare strip-shaped viscose strips;
the fourth step: double-channel drawing: making the viscose drawn slivers prepared in the third step into viscose drawn slivers by a double-channel drawing frame, wherein the double-channel drawing frame comprises a first drawing part and a second drawing part, the first drawing parts are 6 or 8 first drawing devices which are completely the same, the 6 or 8 first drawing devices comprise a left drawing group and a right drawing group, the left drawing group and the right drawing group are transversely arranged in parallel left and right, the left drawing group and the right drawing group respectively comprise 3 or 4 first drawing devices, the 3 or 4 first drawing devices in the left drawing group are longitudinally arranged in parallel front and back, the 3 or 4 first drawing devices in the right drawing group are longitudinally arranged in parallel front and back, the first drawing device comprises a feeding barrel, the viscose drawn slivers prepared in the third step are wound in the feeding barrel, the number of the feeding barrel is between 5 and 8, a guide strip is arranged at the upper part of each barrel, a first drafting roller group is arranged on the right side of a feeding sliver can of each first sliver merging device of the left sliver merging group, a first drafting roller group is arranged on the left side of the feeding sliver can of each first sliver merging device of the right sliver merging group, each first drafting roller group comprises 3-4 groups of drafting rollers, the total drafting multiple of the first drafting roller group is 0.5-6% higher than the number of the feeding sliver cans, a first convergence horn mouth is arranged on the right side of the first drafting roller group of each first sliver merging device of the left sliver merging group, a first convergence horn mouth is arranged on the left side of the first drafting roller group of each first sliver merging device of the right sliver merging group, the section of each first convergence horn mouth is semicircular, and the radius of the semicircular section of each first convergence horn mouth towards the right is gradually reduced along the length direction of the first convergence horn mouth; the second drawing device comprises a guide plate, the guide plate is of a rectangular structure, the center part of the guide plate is of a downward-concave arc structure, the guide plate is positioned in the middle of a left drawing group and a right drawing group, guide wheels are arranged on the left side of the guide plate, the number of the guide wheels is equal to that of the first drawing devices in the left drawing group, one guide wheel is positioned on the right side of the first gathering bell mouth of the corresponding first drawing device in the left drawing group, the distance between the guide wheel and the first gathering bell mouth of the first drawing device is gradually reduced from back to front along the length direction of the guide plate, the guide wheel is arranged on the right side of the guide plate, the number of the guide wheels is equal to that of the first drawing devices in the right drawing group, one guide wheel is positioned on the right side of the first gathering bell mouth of the corresponding first drawing device in the right drawing group, the distance between the guide wheel and the first gathering bell mouth of the first drawing device is gradually reduced from back to front along the length direction of the guide plate, the front side of the guide plate is provided with a press roller, the number of the press rollers is equal to the number of the first collecting devices in the first collecting part, the press rollers are transversely arranged in parallel along the front side of the guide plate and comprise an upper press roller and a lower press roller, the lower press roller of each press roller is driven to rotate by a single motor, each motor is connected with a programmable logic controller, a second drafting roller set is arranged at the front side of the guide plate and comprises 3-4 groups of drafting rollers, the total drafting multiple of the second drafting roller set is 1% -8% higher than the number of the first collecting devices in the first collecting part, a second converging horn mouth is arranged at the front part of the second drafting roller set, the geometric structures of the first converging horn mouth and the second converging mouth are the same but the areas of the first converging horn mouth and the second converging mouth are different, a winding barrel is arranged at the lower part of the second drafting roller set, and a coiler is arranged above the winding barrel, a sliver evenness detecting device is arranged between the coiler and the second drafting roller group and is connected with the programmable logic controller;
the fifth step: roving: drawing, thinning, twisting and winding the viscose drawn sliver prepared in the fourth step by a roving machine to prepare viscose roving;
and a sixth step: spinning: drafting, thinning, twisting and winding the viscose roving prepared in the fifth step by a spinning machine to prepare viscose cop;
the seventh step: spooling: and (4) carrying out a winding machine on the viscose cop obtained in the sixth step to obtain the viscose cone yarn.
Furthermore, the viscose fiber is made of elegant viscose with the average linear density of 1.33dtex and the average length of 38 mm.
Furthermore, in the step of opening picking, the selected viscose fibers are sequentially grabbed by an FA002A type disc type plucker according to a mixing proportion, primary opening and mixing of the viscose fibers are realized in the grabbing process, different conveying paths under air flow conveying are generated by an A035 type multi-bin cotton mixer to generate mixing action, opening and impurity removal of the viscose fibers are realized in the air flow conveying process, the viscose fibers are transferred and grabbed by a beater with needle cloth of an A036 type pig type plucker to realize further opening and impurity removal of the viscose fibers, and the viscose fibers are manufactured into uniform viscose reels by an A076 lapper.
Furthermore, in the cotton carding process, an FA201B carding machine, a doffer for spun-bonded glue and metal card clothing of a cylinder are selected, and the difference of the working angles of the two needle teeth is larger than that of the metal card clothing during cotton spinning, so that the transfer rate is improved; the density of the card clothing teeth of the cover plate is thin, the diameter of the card wire is slightly thick, and the height of the card wire is properly reduced so as to meet the requirements of high-yield and strong carding; the cylinder uses an AC2525x1550 card clothing model, and the doffer uses an AD4030x1890 card clothing model, so that the card clothing state is kept good, the web definition is improved, and neps are reduced; the licker-in saw blade is a thin saw blade with the specification of 80X4.5 teeth/25.4 mm, so that the puncturing and carding capabilities to the viscose glue are improved.
Furthermore, in the double-channel drawing step, the viscose strips prepared in the third step are wound in feeding barrels, 5 to 8 feeding barrels are placed in the corresponding part of each first doubling device in the left doubling group and the right doubling group, the viscose strips wound in each feeding strip extend out and are output after being pressed by a strip guide roller, the output 5 to 8 viscose strips jointly enter a first drafting roller group of the first doubling device for drafting, each drafted viscose strip enters a first convergence bell mouth to realize re-doubling, viscose semi-finished strips are obtained after doubling, the density of the viscose strips is reduced in the drafting process, meanwhile, viscose fibers in the viscose strips are straightened through the drafting effect, the fiber straightness in the viscose strips is improved, the evenness of the prepared viscose semi-finished strips is improved through re-doubling of the drafted viscose strips, then the viscose semi-cooked strips output by each first sliver collecting device bypass guide wheels on a guide plate, the guide wheels realize 90-degree steering, so that each viscose semi-cooked strip is conveyed along the length direction of the guide plate, the steered viscose semi-cooked strips are pressed between an upper pressing roller and a lower pressing roller of a pressing roller at the front side of the guide plate after being conveyed along the guide plate, the lower pressing roller of the pressing roller is driven by a motor to rotate at the moment, so that the active output of the viscose semi-cooked strips is realized, 6 or 8 output viscose semi-cooked strips enter a second roller drafting group together for drafting, each drafted viscose semi-cooked strip then enters a second gathering horn mouth to realize re-merging, the viscose semi-cooked strips are obtained after merging, the density reduction of the viscose semi-cooked strips is realized in the drafting process, and simultaneously viscose fibers in the viscose semi-cooked strips are straightened through the drafting effect, the fiber straightness in the viscose semi-cooked sliver is improved, the evenness of the prepared viscose semi-cooked sliver is improved by re-combining the drafted viscose semi-cooked sliver, the prepared viscose semi-cooked sliver is driven by a coiler to be continuously coiled in a winding bobbin after being detected by a sliver evenness detection device, in the process, when the sliver evenness detection device detects that the sliver evenness of the viscose semi-cooked sliver is thickened, when the thickening proportion is within 15%, the rotating speed of lower press rollers of 3-4 press rollers randomly selected by a programmable logic controller is reduced, so that the fed viscose semi-cooked sliver is reduced, when the thickening proportion is greater than 15%, the programmable logic controller controls the rotating speed of the lower press rollers of all the press rollers to be reduced, so that the fed viscose semi-cooked sliver is reduced, when the sliver evenness detection device detects that the sliver evenness of the viscose semi-cooked sliver is thinned, when the thinning proportion is within 15%, and when the thickening proportion is more than 15%, the programmable logic controller controls the rotating speed of the lower pressing rollers of all the pressing rollers to increase, so that the fed viscose semi-cooked strips are increased.
Further, in the roving step, an FA458 roving machine is selected.
Further, in the spinning step, an FA506 spinning frame is selected, the spun yarn adopts a siro spinning process, and 2 viscose rough yarns are fed into the spinning frame together.
Further, in the spooling step, a Savio spooling machine is selected.
Compared with the prior art, the invention has the beneficial effects that: the viscose fiber drawing method comprises the steps of grabbing and primarily opening and mixing selected viscose fibers, viscose air suction flowers and roving ends through a disc type plucker, mixing and opening through a multi-bin cotton mixer, opening and removing impurities through a porcupine type opener, manufacturing uniform viscose rolls through a lap former, deeply opening, carding, removing impurities and forming into strips through a carding machine, manufacturing the strips into sticky strips, drawing the sticky strips twice through a double-channel drawing frame to directly manufacture sticky strips, and remarkably improving drawing efficiency.
Detailed Description
The present invention will be further described with reference to the following specific examples.
A viscose yarn high-efficient production method, through picking and preliminary opening the mixing of disc type plucker with the roving head through the air-absorbing flower of viscose of the selective viscose fiber, viscose, through mixing and opening in the multi-storehouse cotton mixer, open and remove the impurity through the porcupine type opener, make even viscose roll through the lapper, make the viscose roll go on deep opening, carding, remove impurity, make into the strip viscose strip after the sliver is gone on by the carding machine, then realize twice drawing and thus make the viscose drawn sliver directly through the double-channel drawing frame with the viscose drawn sliver, thus obviously improve drawing efficiency, then make required viscose yarn through roving, spun yarn, spooling in proper order with the viscose drawn sliver, specifically include the following steps:
the first step is as follows: cotton blending: for viscose single mark spinning, in order to prevent the fluctuation of fiber whiteness and dyeing property, the single mark raw material is adopted to avoid yellow-white yarn or cloth cover crosspiece, the viscose adopts elegant viscose with the average linear density of 1.33dtex and the average length of 38mm, and simultaneously, in order to save production raw materials and reduce spinning cost, a small part of viscose air suction flower and roving head are added;
the second step is that: opening and picking: the method comprises the following steps that selected viscose fibers are sequentially grabbed by an FA002A type disc type plucker according to a mixing proportion, preliminary opening and mixing of the viscose fibers are achieved in the grabbing process, mixing action generated by different conveying paths under air flow conveying is conducted by an A035 type multi-bin cotton mixer, opening and impurity removal of the viscose fibers are achieved in the air flow conveying process, the viscose fibers are transferred and grabbed by a beater with needle cloth of an A036 type porcupine type opener to achieve further opening and impurity removal of the viscose fibers, and uniform viscose rolls are manufactured by an A076 lap former; the viscose fiber has good length uniformity, is soft, smooth, fluffy and low in impurity content, and excessive rolling and excessive striking can increase the neps at the rear part, so the technological principle of 'frequently grabbing and grabbing, combing instead of beating, and more combing and less dropping' is adopted in the cotton cleaning process; in the disc cotton grabbing process, according to the principle of fine cotton grabbing, the small grasping of the cotton grabbing amount of each tooth of a cotton grabbing beater blade of the disc type cotton grabbing machine is ensured; in the multi-bin cotton mixing process, the capacity of the multi-bin cotton mixing machine is increased according to the full mixing principle, and the delay time is increased, so that a better mixing effect is achieved; in the porcupine type cotton opening process, the viscose fiber is opened and purified by a mechanical part between a beater and a dust rod;
the third step: carding cotton: the viscose roll prepared in the second step is made into strip viscose strips after deep opening, carding, impurity removal and striping by a carding machine, an FA201B carding machine is selected, the carding process adopts the process principle of 'light weight, low speed and middle spacing', the aim of transferring fibers is mainly taken, the difference value of the working angles of needle teeth of doffers and metal card clothing of a cylinder for spinning viscose is larger than that of spinning cotton, so that the transfer rate is improved; the density of the card clothing teeth of the cover plate is thin, the diameter of the card wire is slightly thick, and the height of the card wire is properly reduced so as to meet the requirements of high-yield and strong carding; the cylinder uses an AC2525x1550 card clothing model, and the doffer uses an AD4030x1890 card clothing model, so that the card clothing state is kept good, the web definition is improved, and neps are reduced; the licker-in saw blade is a thin saw blade with the specification of 80X4.5 teeth/25.4 mm, so that the puncturing and carding capabilities to the viscose glue are improved;
the fourth step: double-channel drawing: making the viscose drawn slivers prepared in the third step into viscose drawn slivers by a double-channel drawing frame, wherein the double-channel drawing frame comprises a first drawing part and a second drawing part, the first drawing parts are 6 or 8 first drawing devices which are completely the same, the 6 or 8 first drawing devices comprise a left drawing group and a right drawing group, the left drawing group and the right drawing group are transversely arranged in parallel left and right, the left drawing group and the right drawing group respectively comprise 3 or 4 first drawing devices, the 3 or 4 first drawing devices in the left drawing group are longitudinally arranged in parallel front and back, the 3 or 4 first drawing devices in the right drawing group are longitudinally arranged in parallel front and back, the first drawing device comprises a feeding barrel, the viscose drawn slivers prepared in the third step are wound in the feeding barrel, the number of the feeding barrel is between 5 and 8, a guide strip is arranged at the upper part of each barrel, the right side of a feeding sliver can of each first sliver collecting device of the left sliver combining group is provided with a first drafting roller group, the left side of the feeding sliver can of each first sliver collecting device of the right sliver combining group is provided with a first drafting roller group, the first drafting roller group comprises 3-4 groups of drafting rollers, the total drafting multiple of the first drafting roller group is 0.5-6% higher than the number of the feeding sliver cans, the right side of the first drafting roller group of each first sliver collecting device of the left sliver combining group is provided with a first convergence horn mouth, the left side of the first drafting roller group of each first sliver collecting device of the right sliver combining group is provided with a first convergence horn mouth, the section of the first convergence horn mouth is semicircular, the semicircular radius of the section of the first convergence horn mouth towards the right is gradually reduced along the length direction of the first convergence horn mouth, the second sliver combining device comprises a guide plate, and the guide plate is of a rectangular structure, the center part of the guide plate is of a downward-concave arc structure, the guide plate is positioned in the middle of the left drawing group and the right drawing group, guide wheels are arranged on the left side of the guide plate, the number of the guide wheels is equal to that of the first drawing devices in the left drawing group, one guide wheel is positioned on the right side of the first converging horn mouth of the corresponding first drawing device in the left drawing group, the distance between the guide wheel and the first converging horn mouth of the first drawing device is gradually reduced from back to front along the length direction of the guide plate, the guide wheel is arranged on the right side of the guide plate, the number of the guide wheels is equal to that of the first drawing devices in the right drawing group, one guide wheel is positioned on the right side of the first converging horn mouth of the corresponding first drawing device in the right drawing group, the distance between the guide wheel and the first converging horn mouth of the first drawing device is gradually reduced from back to front along the length direction of the guide plate, the front side of the guide plate is provided with a press roller, the number of the press rollers is equal to the number of the first collecting devices in the first collecting part, the press rollers are transversely arranged in parallel along the front side of the guide plate and comprise an upper press roller and a lower press roller, the lower press roller of each press roller is driven to rotate by a single motor, each motor is connected with a programmable logic controller, a second drafting roller set is arranged at the front side of the guide plate and comprises 3-4 groups of drafting rollers, the total drafting multiple of the second drafting roller set is 1% -8% higher than the number of the first collecting devices in the first collecting part, a second converging horn mouth is arranged at the front part of the second drafting roller set, the geometric structures of the first converging horn mouth and the second converging mouth are the same but the areas of the first converging horn mouth and the second converging mouth are different, a winding barrel is arranged at the lower part of the second drafting roller set, and a coiler is arranged above the winding barrel, a sliver evenness detecting device is arranged between the coiler and the second drafting roller group and is connected with the programmable logic controller; when in use, the viscose strips prepared in the third step are wound in a feeding sliver can, 5-8 feeding slivers are placed at the corresponding part of each first doubling device in the left doubling group and the right doubling group, the viscose strips wound in each feeding strip extend out and are output after being pressed by a guide roller, the output 5-8 viscose strips jointly enter a first drafting roller group of the first doubling device for drafting, each drafted viscose strip enters a first convergent bell mouth to realize re-doubling, viscose semi-cooked strips are obtained after doubling, the density of the viscose strips is reduced in the drafting process, meanwhile, viscose fibers in the viscose strips are straightened through the drafting effect, the fiber straightness in the viscose strips is improved, the evenness of the viscose semi-cooked strips is improved through re-doubling of the drafted viscose strips, then the viscose semi-cooked strips output by each first sliver collecting device bypass guide wheels on a guide plate, the guide wheels realize 90-degree steering, so that each viscose semi-cooked strip is conveyed along the length direction of the guide plate, the steered viscose semi-cooked strips are pressed between an upper pressing roller and a lower pressing roller of a pressing roller at the front side of the guide plate after being conveyed along the guide plate, the lower pressing roller of the pressing roller is driven by a motor to rotate at the moment, so that the active output of the viscose semi-cooked strips is realized, 6 or 8 output viscose semi-cooked strips enter a second roller drafting group together for drafting, each drafted viscose semi-cooked strip then enters a second gathering horn mouth to realize re-merging, the viscose semi-cooked strips are obtained after merging, the density reduction of the viscose semi-cooked strips is realized in the drafting process, and simultaneously viscose fibers in the viscose semi-cooked strips are straightened through the drafting effect, the fiber straightness in the viscose semi-cooked sliver is improved, the evenness of the prepared viscose semi-cooked sliver is improved by re-combining the drafted viscose semi-cooked sliver, the prepared viscose semi-cooked sliver is driven by a coiler to be continuously coiled in a winding bobbin after being detected by a sliver evenness detection device, in the process, when the sliver evenness detection device detects that the sliver evenness of the viscose semi-cooked sliver is thickened, when the thickening proportion is within 15%, the rotating speed of lower press rollers of 3-4 press rollers randomly selected by a programmable logic controller is reduced, so that the fed viscose semi-cooked sliver is reduced, when the thickening proportion is greater than 15%, the programmable logic controller controls the rotating speed of the lower press rollers of all the press rollers to be reduced, so that the fed viscose semi-cooked sliver is reduced, when the sliver evenness detection device detects that the sliver evenness of the viscose semi-cooked sliver is thinned, when the thinning proportion is within 15%, the rotating speed of the lower pressing rollers of 3-4 pressing rollers randomly selected by the programmable logic controller is increased, so that the fed viscose semi-cooked strips are increased, and when the thickening proportion is more than 15%, the programmable logic controller controls the rotating speed of the lower pressing rollers of all the pressing rollers to be increased, so that the fed viscose semi-cooked strips are increased;
the fifth step: roving: drawing, thinning, twisting and winding the viscose drawn sliver prepared in the fourth step by a roving machine to prepare viscose roving; an FA458 roving machine is selected, the roving adopts the process principle of 'light ration, large space and large twist', the roving ration is controlled slightly, and the requirements of the spun yarn siro spinning process are met; the viscose fibers have good uniformity and large friction factor, and the large gauge distance is adopted, and the drafting multiple of the rear zone is controlled to be smaller, so that smooth drafting of fiber strands is facilitated, and the evenness of the strands is improved; the roving has low density and poor cohesive force of viscose fibers, the roving is easy to be broken in the unwinding process, the twist coefficient of the roving is increased to increase the cohesive force among the fibers, and the yarn quality is improved;
and a sixth step: spinning: drafting, thinning, twisting and winding the viscose roving prepared in the fifth step by a spinning machine to prepare viscose cop; selecting an FA506 spinning frame, wherein the spun yarn adopts a siro spinning process, 2 viscose rough yarns are fed into the spinning frame together, the spinning process is a key spinning process, the purpose is to improve the quality of the spun yarn, the total draft multiple of the spinning frame is mainly improved, the control on front-zone floating fibers is enhanced, the spinning process adopts a process principle of 'low spindle speed, small steel collar and light steel wire ring' on the premise of ensuring the compatibility of the draft multiple and the draft force, and the front zone adopts 'tight spacing and strong pressure', so that the spun yarn with excellent performance can be formed;
the seventh step: spooling: making the viscose bobbin yarn obtained in the sixth step into viscose bobbin yarn by a bobbin winder; a Savio winder is selected, and clear parameters are reasonably selected in the winding process, so that the detailed control is strengthened.
To prepare a linear density of 40SFor the example of pure viscose yarn, the corresponding process parameters are as follows:
(1) raw material selection:
(2) designing key process parameters:
opening and picking:
carding cotton:
double-channel drawing:
roving:
spinning:
spooling:
Claims (8)
1. the efficient production method of the viscose yarn is characterized by comprising the following steps:
the first step is as follows: cotton blending: selecting viscose fiber, and simultaneously adding less than 5% of viscose air-absorbing patterns and roving ends;
the second step is that: opening and picking: grabbing the selected viscose fibers by a disc type plucker in sequence according to a mixing proportion, mixing the fibers by a multi-bin cotton mixer, opening the fibers by a porcupine type opener, and making uniform viscose rolls by a lap former;
the third step: carding cotton: the viscose roll prepared in the second step is subjected to deep opening, carding, impurity removal and strip forming by a carding machine to prepare strip-shaped viscose strips;
the fourth step: double-channel drawing: making the viscose drawn slivers prepared in the third step into viscose drawn slivers by a double-channel drawing frame, wherein the double-channel drawing frame comprises a first drawing part and a second drawing part, the first drawing parts are 6 or 8 first drawing devices which are completely the same, the 6 or 8 first drawing devices comprise a left drawing group and a right drawing group, the left drawing group and the right drawing group are transversely arranged in parallel left and right, the left drawing group and the right drawing group respectively comprise 3 or 4 first drawing devices, the 3 or 4 first drawing devices in the left drawing group are longitudinally arranged in parallel front and back, the 3 or 4 first drawing devices in the right drawing group are longitudinally arranged in parallel front and back, the first drawing device comprises a feeding barrel, the viscose drawn slivers prepared in the third step are wound in the feeding barrel, the number of the feeding barrel is between 5 and 8, a guide strip is arranged at the upper part of each barrel, a first drafting roller group is arranged on the right side of a feeding sliver can of each first sliver merging device of the left sliver merging group, a first drafting roller group is arranged on the left side of the feeding sliver can of each first sliver merging device of the right sliver merging group, each first drafting roller group comprises 3-4 groups of drafting rollers, the total drafting multiple of the first drafting roller group is 0.5-6% higher than the number of the feeding sliver cans, a first convergence horn mouth is arranged on the right side of the first drafting roller group of each first sliver merging device of the left sliver merging group, a first convergence horn mouth is arranged on the left side of the first drafting roller group of each first sliver merging device of the right sliver merging group, the section of each first convergence horn mouth is semicircular, and the radius of the semicircular section of each first convergence horn mouth towards the right is gradually reduced along the length direction of the first convergence horn mouth; the second drawing device comprises a guide plate, the guide plate is of a rectangular structure, the center part of the guide plate is of a downward-concave arc structure, the guide plate is positioned in the middle of a left drawing group and a right drawing group, guide wheels are arranged on the left side of the guide plate, the number of the guide wheels is equal to that of the first drawing devices in the left drawing group, one guide wheel is positioned on the right side of the first gathering bell mouth of the corresponding first drawing device in the left drawing group, the distance between the guide wheel and the first gathering bell mouth of the first drawing device is gradually reduced from back to front along the length direction of the guide plate, the guide wheel is arranged on the right side of the guide plate, the number of the guide wheels is equal to that of the first drawing devices in the right drawing group, one guide wheel is positioned on the right side of the first gathering bell mouth of the corresponding first drawing device in the right drawing group, the distance between the guide wheel and the first gathering bell mouth of the first drawing device is gradually reduced from back to front along the length direction of the guide plate, the front side of the guide plate is provided with a press roller, the number of the press rollers is equal to the number of the first collecting devices in the first collecting part, the press rollers are transversely arranged in parallel along the front side of the guide plate and comprise an upper press roller and a lower press roller, the lower press roller of each press roller is driven to rotate by a single motor, each motor is connected with a programmable logic controller, a second drafting roller set is arranged at the front side of the guide plate and comprises 3-4 groups of drafting rollers, the total drafting multiple of the second drafting roller set is 1% -8% higher than the number of the first collecting devices in the first collecting part, a second converging horn mouth is arranged at the front part of the second drafting roller set, the geometric structures of the first converging horn mouth and the second converging mouth are the same but the areas of the first converging horn mouth and the second converging mouth are different, a winding barrel is arranged at the lower part of the second drafting roller set, and a coiler is arranged above the winding barrel, a sliver evenness detecting device is arranged between the coiler and the second drafting roller group and is connected with the programmable logic controller;
the fifth step: roving: drawing, thinning, twisting and winding the viscose drawn sliver prepared in the fourth step by a roving machine to prepare viscose roving;
and a sixth step: spinning: drafting, thinning, twisting and winding the viscose roving prepared in the fifth step by a spinning machine to prepare viscose cop;
the seventh step: spooling: and (4) carrying out a winding machine on the viscose cop obtained in the sixth step to obtain the viscose cone yarn.
2. The efficient viscose yarn production method according to claim 1, wherein the efficient viscose yarn production method comprises the following steps: the viscose fibers are made of elegant viscose with the average linear density of 1.33dtex and the average length of 38 mm.
3. The efficient viscose yarn production method according to claim 1, wherein the efficient viscose yarn production method comprises the following steps: in the step of opening picking, the selected viscose fibers are sequentially grabbed by an FA002A type disc type plucker according to a mixing proportion, primary opening and mixing of the viscose fibers are realized in the grabbing process, different conveying paths under the condition of air flow conveying are generated by an A035 type multi-bin cotton mixer to generate a mixing effect, the opening and impurity removal effects of the viscose fibers are realized in the air flow conveying process, the viscose fibers are transferred and grabbed by a beater with needle cloth of an A036 type porcupine type plucker to realize further opening and impurity removal effects of the viscose fibers, and uniform viscose rolls are manufactured by an A076 lap former.
4. The efficient viscose yarn production method according to claim 1, wherein the efficient viscose yarn production method comprises the following steps: in the cotton carding process, an FA201B cotton carding machine is selected, the cylinder adopts an AC2525X1550 card clothing model, the doffer adopts an AD4030X1890 card clothing model, and the licker-in saw blade adopts a thin saw blade with the specification of 80X4.5 teeth/25.4 mm.
5. The efficient viscose yarn production method according to claim 1, wherein the efficient viscose yarn production method comprises the following steps: in the double-channel drawing step, the viscose strips prepared in the third step are wound in feeding cans, 5-8 feeding cans are placed in a corresponding part of each first doubling device in a left doubling group and a right doubling group, the viscose strips wound in each feeding strip extend out and are pressed by a strip guide roller and then output, the output 5-8 viscose strips jointly enter a first drafting roller group of the first doubling device for drafting, each drafted viscose strip then enters a first gathering horn mouth to realize re-doubling, viscose semi-finished strips are obtained after doubling, the density of the viscose strips is reduced in the drafting process, meanwhile, the drafted viscose fibers in the viscose strips are straightened through the action, the fiber straightness in the viscose strips is improved, the evenness of the prepared viscose semi-finished strips is improved through the re-doubling of the drafted viscose strips, then the viscose semi-cooked strips output by each first sliver collecting device bypass guide wheels on a guide plate, the guide wheels realize 90-degree steering, so that each viscose semi-cooked strip is conveyed along the length direction of the guide plate, the steered viscose semi-cooked strips are pressed between an upper pressing roller and a lower pressing roller of a pressing roller at the front side of the guide plate after being conveyed along the guide plate, the lower pressing roller of the pressing roller is driven by a motor to rotate at the moment, so that the active output of the viscose semi-cooked strips is realized, 6 or 8 output viscose semi-cooked strips enter a second roller drafting group together for drafting, each drafted viscose semi-cooked strip then enters a second gathering horn mouth to realize re-merging, the viscose semi-cooked strips are obtained after merging, the density reduction of the viscose semi-cooked strips is realized in the drafting process, and simultaneously viscose fibers in the viscose semi-cooked strips are straightened through the drafting effect, the fiber straightness in the viscose semi-cooked sliver is improved, the evenness of the prepared viscose semi-cooked sliver is improved by re-combining the drafted viscose semi-cooked sliver, the prepared viscose semi-cooked sliver is driven by a coiler to be continuously coiled in a winding bobbin after being detected by a sliver evenness detection device, in the process, when the sliver evenness detection device detects that the sliver evenness of the viscose semi-cooked sliver is thickened, when the thickening proportion is within 15%, the rotating speed of lower press rollers of 3-4 press rollers randomly selected by a programmable logic controller is reduced, so that the fed viscose semi-cooked sliver is reduced, when the thickening proportion is greater than 15%, the programmable logic controller controls the rotating speed of the lower press rollers of all the press rollers to be reduced, so that the fed viscose semi-cooked sliver is reduced, when the sliver evenness detection device detects that the sliver evenness of the viscose semi-cooked sliver is thinned, when the thinning proportion is within 15%, and when the thickening proportion is more than 15%, the programmable logic controller controls the rotating speed of the lower pressing rollers of all the pressing rollers to increase, so that the fed viscose semi-cooked strips are increased.
6. The efficient viscose yarn production method according to claim 1, wherein the efficient viscose yarn production method comprises the following steps: in the roving step, an FA458 roving machine is selected.
7. The efficient viscose yarn production method according to claim 1, wherein the efficient viscose yarn production method comprises the following steps: in the spinning step, an FA506 spinning frame is selected, the spun yarn adopts a siro spinning process, and 2 viscose rough yarns are fed into the spinning frame together.
8. The efficient viscose yarn production method according to claim 1, wherein the efficient viscose yarn production method comprises the following steps: in the spooling step, a Savio spooling machine is selected.
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