Disclosure of Invention
The technical problem to be solved is as follows: in order to overcome the defects of the prior art, viscose fibers and polyester fibers are respectively subjected to respective opening and picking to prepare viscose films and polyester rolls which are jointly fed into a carding machine to prepare polyester/viscose blended yarns, so that the carding and mixing slivering continuity of the viscose fibers and the polyester fibers is realized in one carding process, and the prepared polyester/viscose blended yarns are sequentially subjected to two drawing, roving and spinning processes to prepare the required viscose environment-friendly blended yarns, so that the production efficiency of the blended yarns is improved, and the mixing effect is improved.
The technical scheme is as follows: a production method of terylene/viscose environment-friendly blended yarn comprises respectively opening and cleaning viscose fiber and polyester fiber to obtain viscose film and polyester coil, feeding the viscose film and polyester coil into a carding machine together to obtain terylene/viscose mixed bar, wherein the carding machine comprises a left cotton-feeding device, a right cotton-licker-in feeding device, a left cylinder-cover plate carding device, a doffer-press roller bar-pressing device, the viscose film and polyester coil are fed into the carding machine respectively from the left cotton-licker-in feeding device and the right cylinder-cover plate carding device, carding and impurity removal are respectively realized in the left cylinder-cover plate carding device and the right cylinder-cover plate carding device, the viscose fiber on the left cylinder in the left cylinder-cover plate carding device and the polyester fiber on the right cylinder in the right cylinder-cover plate carding device are stripped by the doffer in the doffer-press roller bar-pressing device, and then are pressed into bar by a large bar coiler to be output, the polyester/viscose blended sliver is prepared, so that the carding and mixing slivering continuity of viscose fibers and polyester fibers is realized in one cotton carding process, and the prepared polyester/viscose blended sliver is sequentially subjected to two drawing, roving and spinning processes to prepare the required polyester/viscose environment-friendly blended yarn, and the method comprises the following steps:
the first step is as follows: cotton blending: selecting 33.73% of 1.30dtex 38mm blue-refined environment-friendly viscose fiber, 62.64% of 1.56dtex 38mm polyester fiber, 1.82% of polyester/viscose roving and 1.81% of polyester/viscose mixed sliver as raw materials;
the second step is that: polyester opening picking and viscose opening picking: for viscose open-picking cotton, because the viscose fiber has good length uniformity, is soft and smooth, is fluffy and contains less impurities, and excessive rolling and excessive striking can cause the increase of rear neps, so the technological principle of 'gripping with less hands and fingers, beating with more fingers and less drops' is adopted in the cotton cleaning process, viscose fibers are sequentially gripped by a disc type bale plucker according to the mixing proportion, the opening and impurity removal and the uniform mixing of a multi-bin cotton mixer, the opening and impurity removal of a porcupine type cotton opener and the uniform coiling of a lap former to prepare the viscose film, for the plucker, according to the principle of fine plucking, the plucking amount of each tooth of the plucking beater blade of the disc type plucker is ensured to be mastered slightly less, for the cotton mixer, the capacity of the multi-bin cotton mixer is increased according to the principle of full mixing, the delay time is increased, and the better mixing effect is achieved, for the opener, the fed viscose fibers are opened and purified by a mechanical part between a beater and a dust rod;
for the terylene scutching, the terylene fiber is sequentially grabbed by a disc type plucker according to a mixing proportion, the terylene fiber is subjected to opening, impurity removal and uniform mixing by a multi-bin cotton mixer, the terylene fiber is prepared into the terylene roll by the opening and impurity removal of the porcupine cotton opener and the uniform rolling of a lap former, the plucking amount of each tooth of a plucking beater blade of the disc type plucker is ensured to be controlled slightly according to the principle of fine plucking for the plucker, the capacity of the multi-bin cotton mixer is increased according to the principle of sufficient mixing for the cotton mixer, the delay time is increased to achieve a better mixing effect, for the scutching machine, the fed viscose fiber is subjected to the opening and impurity removal by a mechanical part between the beater and a dust rod, the beater speed is set to be 540r/min, the rotating speed of the cotton feeding roller is set to be 40r/min, the spacing between the beater and the cotton feeding roller is 6.5mm, the spacing between the beater and the dust rod is 12mm from the inlet, and the spacing between the outlet is 16.5mm, the spacing distance between the dust rods is 13mm in the inlet group, 8mm in the middle group and 5.5mm in the outlet group, and the spacing distance between the beater and the cotton stripping knife is 1.6 mm;
the third step: carding cotton: the viscose film and the terylene roll prepared in the second step are jointly fed into a carding machine to prepare the terylene/viscose raw sliver, wherein the carding machine comprises a left cotton feeding-licker-in feeding device, a right cotton feeding-licker-in feeding device, a left cylinder-cover plate carding device, a right cylinder-cover plate carding device and a doffer-press roller pressing and sliver forming device which are arranged in parallel, the structures of the left cotton feeding-licker-in feeding device and the right cotton feeding-licker-in feeding device are completely the same and are arranged in parallel in the carding machine from left to right, the left cotton feeding-licker-in feeding device and the right cotton feeding-licker-in feeding device comprise a cotton feeding part and a licker-in part, wherein the cotton feeding part comprises a cotton feeding box, a cotton roll roller, a cotton feeding roller and a cotton feeding plate, the cotton feeding plate is positioned at the lower part of the outer circumference of the cotton roller, and the viscose roll is fed into the carding machine from the cotton feeding part of the left cotton feeding-licker-in feeding device, the terylene roll is fed into a carding machine by a cotton feeding part of a right cotton feeding-licker-in feeding device, at the moment, a viscose film or a terylene roll which is placed in a cotton feeding box is firstly driven and fed by the uniform pressing of a cotton roll roller and then enters a position between the cotton feeding roller and a cotton feeding plate to be held, at the moment, the held and pressed viscose film or terylene roll is driven by the rotation of the cotton feeding roller to be output in the state of a polyester viscose fiber layer or a terylene fiber layer, a licker-in opening part comprises a licker-in, a dust removing knife and a small under-leakage are arranged on the outer circumference of the licker-in, the fibers in the polyester viscose fiber layer or the terylene fiber layer output between the cotton feeding roller and the cotton feeding plate are continuously peeled by the rotating licker-in, thereby the transfer process of the fibers from the cotton feeding part to the licker-in opening part is completed, the preliminary holding and carding of the fiber layer is realized in the process of the rotating and peeling of the licker-in, the tail end of a cotton bundle is firmly held by a cotton feeding roller and a cotton feeding plate, the head end of the cotton bundle is punctured and divided by a licker-in to complete the carding of a fiber layer, then the saw teeth on the licker-in and the fibers generate relative sliding and friction to ensure that the fibers in the fiber layer are straightened and transversely separated to complete the carding of the fiber layer, finally the holding of the tail end of the same fiber layer is weakened along with the feeding of a subsequent fiber layer, the saw teeth on the licker-in grab away the fiber layer to complete the decomposition of the fiber layer, the stripped fiber layer immediately enters a licker-in opening part and rotates along with the rotation of the licker-in, at the moment, the licker-in rotates at high speed, so that a layer of air flows on the surface of the licker-in due to the friction, the inner layer of air drives the outer layer of air layer to drive layer by layer, and the impurities in the fiber layer are positioned on the outer layer of the air flow layer, the fiber in the fiber layer is positioned in the inner layer of the airflow layer, so that impurities and short fibers in the fiber layer fall and are removed in an area connected with the cotton feeding plate, the dust removing knife and the small under screen, a first impurity falling area is formed between the distance point of the cotton feeding plate and the licker-in roller and the distance point of the dust removing knife and the licker-in roller in the process, large impurities fall, a second impurity falling area is formed between the distance point of the dust removing knife and the licker-in roller and the carding plate or the small under screen inlet, a small amount of large impurities and a majority of small impurities fall, and a third impurity falling area is formed between the small under screen inlet and the small under screen outlet, and short fibers and dust are fallen;
the left cylinder-cover plate carding device and the right cylinder-cover plate carding device have the same structure and are arranged in parallel in a carding machine, the left cylinder-cover plate carding device and the right cylinder-cover plate carding device comprise cylinders, a cover plate, a front fixed cover plate, a rear fixed cover plate, a front cover plate, a rear cover plate and a large drain floor are arranged on the outer circumference of the cylinder, and the fibers in a polyester fiber layer or a polyester fiber layer output by the rotation of a licker-in are continuously stripped by the rotating cylinders, so that the transfer process of the fibers from a cotton-licker-in feeding device to the cylinder-cover plate carding device is completed, the fiber layer is finely and freely carded in the process of finely carding the fibers by the rotation of the cylinders, in the process, the free carding process of the fibers is realized under the action of double needle surfaces of sawteeth on the surfaces of the cylinders and the sawteeth on the surfaces of the licker-in, and the free carding process of the fibers on the two surfaces is realized due to the difference of the structures of the grabbed sawteeth on the surfaces of the cylinders and the two needle surfaces of the licker-in the cylinder The capacity of the carding machine is different, the needle surface with strong fiber grabbing capacity holds fibers, the needle surface with weak fiber grabbing capacity and the fibers slide relatively, so that the carding effect of straightening and carding the fibers is achieved, then the fiber holding and carding are changed along with the continuous change of the grabbing capacity of the two needle surfaces, the fibers are transferred between the two needle surfaces, the stripped fiber layer immediately enters a cylinder-cover plate carding device and rotates along with the rotation of a cylinder, at the moment, the entering fibers are finely carded between the cylinder and the cover plate, so that the fiber layer is decomposed, the fibers are separated, impurities are thrown, the front cover plate, the rear cover plate and the large leakage bottom prevent the fibers from flying apart, impurity short fibers are removed, and the fixed cover plate performs auxiliary carding and finishing on the fibers;
the doffer-press roll pressing and strip forming device comprises a doffer, wherein a cotton stripping roller, a large press roll and a coiler are sequentially arranged at the front part of the doffer, the doffer is arranged at the front parts of a left cylinder-cover plate carding device and a right cylinder-cover plate carding device, the left end of the doffer is aligned with the left end of a cylinder of the left cylinder-cover plate carding device, the right end of the doffer is aligned with the right end of a cylinder of the right cylinder-cover plate carding device, the viscose fiber of the cylinder needle surface of the left cylinder-cover plate carding device and the polyester fiber of the cylinder needle surface of the right cylinder-cover plate carding device are jointly condensed into a polyester/viscose fiber layer by the doffer during carding, and at the moment, the grabbing of different doffers to the viscose fiber and the polyester fiber in different proportions is realized through the rotating speed control of the cylinder of the left cylinder-cover plate carding device and the cylinder of the right cylinder-cover plate carding device, the control of different blending ratios of viscose fibers and polyester fibers in the blended yarn is realized, so that the fiber transfer and condensation on the area of a quick cylinder are completed to one unit area of a slow doffer, the transfer process of the fiber from the cylinder-cover plate carding device to a doffer-compression roller pressing and strip forming device is completed, a polyester/viscose fiber layer condensed on the doffer is continuously stripped by a stripping roller, the structure and the uniformity are kept in the stripping process, a polyester/viscose fiber net is formed, the polyester/viscose fiber net is pressed into strips by a large compression roller after being gathered, and the polyester/viscose fiber net is continuously wound on a sliver can through a coiler;
the fourth step; drawing: the polyester/viscose raw sliver prepared in the third step is subjected to two-pass drawing to prepare polyester/viscose drawn sliver, 8 polyester/viscose raw slivers prepared in the third step are jointly fed in the first drawing, the polyester/viscose semi-drawn sliver is prepared through drawing and re-doubling of the first drawing machine, a drawing system adopts three-upper three-lower pressing type pressure bars to guide to an upper roller for curve drawing, 8 polyester/viscose semi-drawn sliver is jointly fed in the second drawing, the viscose drawn sliver is prepared through drawing and re-doubling of the second drawing machine, and the drawing system adopts four-upper four-lower pressing type pressure bars to guide to an upper roller for double-area curve drawing;
the fifth step: roving: feeding the 1 polyester/viscose drawn sliver prepared in the fourth step into a roving frame, drafting, thinning, twisting and winding the roving frame to prepare polyester/viscose roving, wherein the roving adopts the process principle of light ration, large gauge length and large twist, the roving ration is mastered slightly so as to meet the requirements of the chemical fiber blending process, and the chemical fiber uniformity is good, the friction factor is large, the large gauge length is adopted, and the rear zone drafting multiple is controlled slightly, so that the smooth drafting of fiber strands is facilitated, and the evenness of the sliver is improved;
and a sixth step: spinning: feeding the 1 terylene/viscose roving obtained in the fourth step into a spinning frame, drafting, fine-drawing, twisting and winding the terylene/viscose environment-friendly blended yarn by the spinning frame to obtain the terylene/viscose environment-friendly blended yarn, wherein the spinning process mainly aims to improve the quality of spun yarn, the main point is to improve the total draft multiple of the spinning frame and strengthen the control on the floating fiber in the front area, the process principle of low spindle speed, small steel collar and light steel wire ring is adopted on the premise of ensuring the compatibility of the draft multiple and the draft force, and the front area adopts tight spacing and strong pressure, so that the excellent evenness is formed.
Preferably, in the second step, a disc type plucker of type FA002A is used.
Preferably, in the second step, a multi-bin cotton mixer of type A035 is used.
Preferably, in the second step, a porcupine opener of type a036 is used.
Preferably, in the second step, a lap former of type a076 is used.
Preferably, in the second step, for the disc type bale plucker in viscose opening picking, the distance of the beater blade extending out of the rib is 2.82mm, the intermittent descending distance of the bale plucker beater is 3.2mm, the running speed of a trolley of the bale plucker is 23m/min, and the rotating speed of the bale plucker beater is 945 r/min.
Preferably, in the second step, the cotton mixer in viscose opening and picking is set with the bin changing pressure 218, the opening beater rotation speed 975r/min, the cotton feeding roller speed 0.25r/min and the cotton conveying fan rotation speed 1510 r/min.
Preferably, in the second step, for the opener in viscose opening and cleaning, the beater speed is 545r/min, the rotating speed of the cotton feeding roller is 40r/min, the spacing distance between the beater and the cotton feeding roller is 6.5mm, the spacing distance between the beater and the dust rod is 12mm, the spacing distance between the inlet and the outlet is 16.5mm, the spacing distance between the dust rod is 13mm for one group of inlet, 8mm for two groups of middle, 5.5mm for one group of outlet, and the spacing distance between the beater and the cotton stripping knife is 1.8 mm.
Preferably, in the second step, for the disc type plucker in the terylene scutching, the distance of the blade of the beater extending out of the rib is 2.75mm, the intermittent descending distance of the plucker beater is 3.25mm, the running speed of a trolley of the plucker is 23.5m/min, and the rotating speed of the plucker beater is 950 r/min.
Preferably, in the second step, the cotton mixer in the terylene cotton opening and picking is set with the bin changing pressure 220, the rotating speed of an opening beater 980r/min, the speed of a cotton feeding roller 0.23r/min and the rotating speed of a cotton conveying fan 1500 r/min.
Has the advantages that: the viscose fiber and the polyester fiber are respectively subjected to respective opening and picking to prepare the viscose film and the polyester fiber roll, and the viscose film and the polyester fiber roll are jointly fed into a carding machine to prepare the polyester/viscose blended yarn, so that the carding and mixing sliver continuity of the viscose fiber and the polyester fiber is realized in one carding process, and the prepared polyester/viscose blended yarn is sequentially subjected to two drawing, roving and spinning processes to prepare the required viscose environment-friendly blended yarn, so that the production efficiency of the blended yarn is improved, and the mixing effect is improved.