CN112410946A - High-twist-zone yarn forming method for two-for-one twisting spinning - Google Patents
High-twist-zone yarn forming method for two-for-one twisting spinning Download PDFInfo
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- 238000009987 spinning Methods 0.000 title claims abstract description 101
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000007246 mechanism Effects 0.000 claims abstract description 86
- 238000004804 winding Methods 0.000 claims abstract description 76
- 230000003068 static effect Effects 0.000 claims abstract description 39
- 239000000835 fiber Substances 0.000 claims abstract description 38
- 230000009471 action Effects 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 7
- 230000002146 bilateral effect Effects 0.000 claims description 6
- 230000002045 lasting effect Effects 0.000 abstract description 2
- 238000003860 storage Methods 0.000 description 11
- 238000007378 ring spinning Methods 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010985 leather Substances 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 229920000742 Cotton Polymers 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 235000013351 cheese Nutrition 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000009940 knitting Methods 0.000 description 2
- 229910001092 metal group alloy Inorganic materials 0.000 description 2
- 238000007383 open-end spinning Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 241000168254 Siro Species 0.000 description 1
- 229910000828 alnico Inorganic materials 0.000 description 1
- 238000009960 carding Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010040 friction spinning Methods 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 description 1
- 238000007382 vortex spinning Methods 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H7/00—Spinning or twisting arrangements
- D01H7/02—Spinning or twisting arrangements for imparting permanent twist
- D01H7/86—Multiple-twist arrangements, e.g. two-for-one twisting devices ; Threading of yarn; Devices in hollow spindles for imparting false twist
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
- D01H1/14—Details
- D01H1/20—Driving or stopping arrangements
- D01H1/24—Driving or stopping arrangements for twisting or spinning arrangements, e.g. spindles
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Abstract
The invention relates to a high-twist-zone yarn forming method for two-for-one twisting spinning, and belongs to the technical field of spinning. The invention changes a two-for-one twisting electric winding mechanism into a two-for-one twisting magnetic winding mechanism, a twisting assisting device is additionally arranged in a yarn feeding pipeline of a twisting disc, a static sliding seat is additionally arranged on the lower wall surface of the static disc, a sliding groove at the lower end of the static sliding seat is in pressure contact with a driving wheel of the twisting assisting device, a high twisting area is formed between the twisting assisting device and a front roller jaw, and a stable twisting area is formed between the twisting assisting device and the magnetic winding mechanism; and (3) leading the fiber strands output by the front roller jaw to enter a high-twist area, twisting the fiber strands into high-twist yarn strands, leading the high-twist yarn strands to enter a stable-twist area through a twisting assisting device for untwisting, and releasing residual stress to obtain high-quality pure staple fiber yarns with conventional twist. The high-twist area of the two-for-one twist spinning is used for spinning, and pure short fiber strands in the spinning area have high yarn forming strength, few broken ends and lasting spinning, so that the method is suitable for spinning pure short fiber fine special yarns with conventional twist by two-for-one twisting, and solves the technical problem that the original two-for-one twist spinning cannot produce the pure short fiber fine special yarns.
Description
Technical Field
The invention relates to a high-twist-zone yarn forming method for two-for-one twisting spinning, and belongs to the technical field of spinning.
Technical Field
The spinning is a process of orderly arranging disordered loose fibers in the processes of opening, carding, drafting and the like, and then linearly converging and twisting. The twisting mode is different, and the structure, the efficiency and the like of the yarn produced by spinning are directly determined. In general, the twist spinning forms are classified into grip end twisting and free end twisting. The gripping end twisting can limit control the fiber strand to carry out forced cohesion twisting, and has the advantages of large cohesion force between fibers, high yarn forming strength, good wear resistance and the like, such as ring spinning technical ring twisting form with large quantity and wide range. However, the ring spinning speed is low, generally tens of meters per minute, the main reason is that the ring spinning twisting and winding mechanism is the same mechanism, twisting and winding are carried out simultaneously, twisting efficiency and package efficiency are mutually restricted, in addition, the spinning frame spinning package forming is a conical cross winding form with grade rise, in the whole spinning process, when the large, medium and small yarns of the cop are formed, the size of the spinning balloon is always changed, the spinning tension is changed along with the change, and therefore, the quality difference of the produced large, medium and small yarns is large. In general, the middle yarn spinning balloon of the spun yarn bobbin is moderate, the quality of the finished yarn is high, the tension of the spun yarn is the largest, the quality of the finished yarn is the lowest, and the quality of the spun yarn is medium. In order to improve the quality of ring spun yarns, novel ring spinning technologies such as compact spinning, siro spinning, soft and clean spinning and the like are developed; however, these new spinning techniques are in the form of ring spinning packages, and the problem of package type leading to yarn quality differences has not been eliminated or solved. In order to improve the spinning efficiency, the current factory usually adopts the open-end spinning technology, such as the rotor spinning speed is up to 280 m/min; the friction spinning speed is up to 500 m/min; vortex spinning speeds are up to 500 m/min. However, when spinning at the free end, because the twisting of the fiber strands can not be effectively held, the fibers in the twisted strands can not be effectively and fully cohered, the strength of the resultant yarn is low, and the abrasion resistance of the yarn is poor. Therefore, the technical problem of contradiction between high quality of the twisted yarn and high-speed large package is generated at present.
In order to improve the spinning yarn twisting efficiency, reduce the twisting energy consumption, increase the spinning yarn package and realize the production of ultra-long large package spun yarns, the Chinese patent publication No. CN109554784A, the publication No. 2019.04.02, the invention provides a double-twist spinning frame, the application publication provides a double-twist twisting winding mechanism which is changed from a ring spindle twisting winding mechanism of a ring spinning frame, the double-twist mechanism and a drafting mechanism are separately arranged, the twisting mechanism rotates for a circle simply and conveniently, and the high-efficiency twisting effect of 2 twists is exerted on the yarn, thereby solving the problem that the double-twist spinning device (the Chinese patent publication No. CN103820889A, the publication No. 2014.05.28) which is additionally provided with the drafting mechanism and the roving hanging mechanism in a yarn storage tank on a static spindle of the double-twist mechanism has poor practicability due to the long spinning package, the complex drafting system, the difficult mechanism operation during the spinning, and the large influence on the spinning quality caused by a spinning balloon, and the technical device has poor practicability, Low application and popularization value; however, the two-for-one twisting spinning machine of the invention adopts a mode of sliding contact of the electric brush to connect the winding device in the yarn storage tank with an external power supply to continuously operate and wind the yarn, and the winding type two-for-one twisting spinning mode of the built-in electric mechanism is substantially adopted, so that the sliding contact electric brush mechanism is rapidly worn and has short service cycle, and particularly, the higher the spinning speed is, the shorter the damage cycle of the device at the electric brush conducting part is, even the device is damaged within 2 hours, and the continuous spinning winding can not be carried out, thereby directly restricting the durable application and wide popularization of the two-for-one twisting.
Particularly, the twisting mode of the two-for-one twisting holding spinning is different from that of the conventional ring spinning, the yarn with the same twist degree is spun, the conventional ring spinning is to directly twist the fiber strands in the spinning area at one time, enough twisting turns are ensured in the yarn forming area of the ring spinning, the staple fibers are clasped to form the yarn with the yarn body strength larger than the drawing tension, and the requirements of continuous and normal twisting of the staple fiber strands to form the yarn are met; however, in the two-for-one twisting holding spinning, a sectional twisting mode is adopted, and twisting turns with the same twisting direction and the same size are respectively applied to the sliver between the holding jaw and the twisting disc and the sliver between the twisting disc and the winding mechanism, so that the twist of a yarn forming area of the two-for-one twisting holding spinning is half of the designed twist, a low twist area is formed, the holding force of short fibers in the yarn forming area of the two-for-one twisting is insufficient, and the strength of the two-for-one twisting forming yarn is always lower than the drawing tension when the conventional twist short fiber yarn (except for strong twisting yarn) is spun, so that the two-for-one twisting forming yarn is difficult to be formed by weaving and knitting short fiber yarn with. Therefore, the two-for-one twisting spinning can only be used for producing filament/short fiber composite yarn, short fiber hard twisting yarn and thick yarn with conventional twist, and the variety of the finished yarn is limited.
Disclosure of Invention
The invention aims to provide a high-twist-zone yarn forming method for two-for-one twisting spinning, aiming at a series of technical problems caused by low-twist-zone yarn forming of the two-for-one twisting spinning.
In order to achieve the purpose, the technical scheme is as follows:
a double-twist spinning machine comprises a drafting system, a hanging mechanism and a double-twist electric winding mechanism, wherein an electric transmission mechanism arranged in the double-twist electric winding mechanism is removed, the double-twist electric winding mechanism is changed into a double-twist magnetic winding mechanism consisting of the double-twist mechanism and the magnetic winding mechanism, an external motor is fixedly arranged on a fixed plate in a bilateral symmetry mode, a driving turntable is fixedly arranged at the rotating shaft end of the external motor, driven turntables are respectively and fixedly arranged at the two ends of the rotating shaft of a winding groove drum, the driving turntable corresponds to the driven turntables in opposite directions, the distance between the driving turntable and the driven turntables is 8-16 mm, permanent magnets uniformly distributed in the circumferential direction are respectively embedded on the opposite wall surfaces of the driving turntable and the driven turntables, the distance between the adjacent permanent magnets is 0.5-5 mm, and the positive poles of the adjacent permanent magnets, The negative poles are arranged in a staggered mode, the outer end face of the driving rotary disc and the outer end face of the driven rotary disc are positioned through magnetic force, and the external motor is externally connected with a power supply.
The twisting assisting device is additionally arranged in a yarn inlet pipeline of a twisting disc of the two-for-one twisting magnetic winding mechanism and is positioned at the inlet end of the yarn inlet pipeline, the twisting assisting device comprises a yarn holder, a twisting assisting tube and a bearing, the twisting assisting tube is in a cylindrical tube shape, the twisting assisting tube is movably arranged in the yarn inlet pipeline of the twisting disc through the bearing, a driving wheel is arranged on the outer wall of the middle part of the twisting assisting tube and is in a circular ring shape, the rotating central axis of the driving wheel is superposed with the rotating central axis of the twisting assisting tube, the yarn holder is positioned in the twisting assisting tube and consists of a pair of mutually pressed elastic sheets, the roots of the elastic sheets are fixedly arranged on the inner wall of the yarn inlet end of the twisting assisting tube, the crowns of the elastic sheets are mutually elastically pressed, and the elastically pressed parts face the yarn outlet end.
A static sliding seat is fixedly and additionally arranged on the lower wall surface of a static disc of the two-for-one twisting magnetic winding mechanism and is in a circular ring shape, the upper end of the static sliding seat is fixedly arranged at the bottom of the static disc, the lower end of the static sliding seat is positioned in an annular groove formed in the twisting disc, a sliding groove at the lower end of the static sliding seat is tightly pressed and contacted with a driving wheel on the twisting-assisted tube, and the ratio of the circumference of the sliding groove at the lower end of the static sliding seat to the outer circumference of the driving wheel on the twisting-assisted.
A high twist area is formed between a yarn holder of the twisting assisting device and a front roller jaw of a drafting system of the two-for-one twisting spinning machine.
A stable twisting area is formed between the yarn holder of the twisting assisting device and the magnetic winding mechanism.
During spinning, an external motor of the magnetic winding mechanism drives a driving turntable to rotate, the driving turntable which rotates drives a driven turntable of a winding groove drum to synchronously rotate under the action of magnetic force, a spindle belt of the two-for-one twisting mechanism drives a twisting disc on a spindle rod to rotate at the speed of n revolutions per minute, meanwhile, a twisting assisting device arranged in the twisting disc rotates at the speed of 2.5n-7.5n revolutions per minute, roving unwound from a roving package arranged on a hanging spindle of a hanging mechanism is drafted into short fiber strands through a drafting system, the short fiber strands are output from a front roller jaw formed by meshing a front roller and a front rubber roller and enter a high twisting area, the short fiber strands in the high twisting area are twisted by the twisting disc and the twisting assisting device to obtain n + (2.5-7.5) twists per minute, twisting and twisting the high-twist sliver with 1.75-4.25 times of the normal design twist to form a high-twist sliver, enabling the high-twist sliver to sequentially pass through a yarn guide hook and a yarn holder of a twisting assisting device, outputting the high-twist sliver by a twisting assisting pipe, sequentially entering a yarn inlet pipeline in a twisting disc, a yarn passage in a rotor combining member, a yarn outlet pipeline in a positioning sleeve, running to a tensioner in the yarn outlet pipeline, running in a stable twisting area, enabling the high-twist sliver in the stable twisting area to be subjected to the combined action of twisting by the twisting disc and untwisting by the twisting assisting device, newly obtaining n- (2.5-7.5) twist turns per minute, overlapping and adjusting the n + (2.5-7.5) twist turns per minute on the high-twist sliver entering the stable twisting area to release residual stress of a yarn body, finally obtaining 2n normal design twist steady-state slivers per minute, carrying out 2-two-fold steady-state spinning, leading out the 2 two-fold steady-state sliver from the yarn outlet pipeline by the tensioner, the yarn is wound on the bobbin under the winding action of the winding groove drum in rotary motion to form a yarn package.
By adopting the technical scheme, compared with the prior art, the high-twist-area yarn forming method for the two-for-one twisting spinning has the following technical advantages: the invention removes the electric transmission mechanism arranged in the double-twisting electric winding mechanism, changes the double-twisting electric winding mechanism into a double-twisting magnetic winding mechanism consisting of the double-twisting mechanism and the magnetic winding mechanism, solves the technical problems of rapid abrasion and short service cycle of an electric brush mechanism in sliding contact due to the adoption of a winding type double-twisting spinning mode with a built-in electric mechanism, greatly prolongs the durability of double-twisting high-speed spinning and the durability of components, and ensures the high-speed, durable and continuous operation of the double-twisting spinning. The invention adopts the technical scheme that a twisting assisting device is additionally arranged in a yarn inlet pipeline of a twisting disc of a two-for-one twisting magnetic winding mechanism, the twisting assisting device is positioned at the inlet end of the yarn inlet pipeline, a static slide seat is fixedly and additionally arranged on the lower wall surface of a static disc of the two-for-one twisting magnetic winding mechanism, a slide groove at the lower end of the static slide seat is tightly pressed and contacted with a driving wheel on a twisting assisting tube, the ratio of the circumference of the slide groove at the lower end of the static slide seat to the outer circumference of the driving wheel on the twisting assisting tube is 2.5-7.5 times, a high twisting area is formed between a yarn holder of the twisting assisting device and a front roller jaw of a drafting system of the two-for-one twisting spinning machine, when the twisting disc applies n twisting turns to a yarn strip between the twisting assisting device and the front roller jaw of the two-for twisting spinning machine per minute, the twisting assisting device simultaneously applies 2.5-7.5 n twisting turns in the same direction per minute to the yarn strip between the, the cohesive short fiber forms a sliver with the strength of a yarn body larger than the drawing tension, the requirement of continuous and normal twisting of short fiber strands for forming yarn is met, the high-twist area yarn forming of the two-for-one twisting spinning is realized, the low-twist area yarn forming mode of the two-for-one twisting spinning is changed, the two-for-one twisting spinning yarn can be used for producing filament/short fiber composite yarn, short fiber hard-twist yarn and thick yarn with conventional twist, pure short fiber fine yarn with conventional twist can be smoothly produced and spun, and the range of yarn varieties capable of being produced by the two-for-one twisting spinning is greatly expanded. Meanwhile, a stable twisting area is formed between a yarn holder of the twisting assisting device and the magnetic winding mechanism, and the twisting assisting device applies 2.5-7.5 n twisting turns opposite to the high twisting area to the yarn running in the stable twisting area every minute, so that the high-twist yarn in the stable twisting area is subjected to the action of 2.5-7.5 n twisting directions of untwisting of the twisting assisting device, the residual stress on a yarn main body is released, and the low-torque, soft and reinforced two-for-one twisted yarn is obtained. Compared with the original two-for-one twisting spinning technology, the invention has the advantages of wide variety range of suitable spinning yarns, high quality of spun yarns, simple and convenient operation, capability of meeting the requirement of lasting continuous large package holding spinning and easy popularization and application.
Drawings
Fig. 1 is a schematic diagram of the working principle of the present invention.
Fig. 2 is a partially enlarged view of a-a in fig. 1.
Detailed Description
The method for forming a yarn in a high twist zone of a two-for-one twist yarn according to the present invention will be described in further detail with reference to the accompanying drawings.
See the attached drawings.
The invention relates to a high-twist-zone yarn-forming method of double-twist spinning, which is an improvement aiming at Chinese patent publication No. CN109457334A, published Japanese 2019.03.12 and invented and created as a double-twist spinning method, and firstly, the structure of a double-twist spinning machine consisting of a drafting system, a hanging mechanism and a double-twist electric winding mechanism in the technical scheme of the double-twist spinning method is improved, the double-twist spun yarn drafting system before improvement consists of a rear roller, a rear leather roller, a middle upper roller, a middle lower roller, an upper leather collar, a middle lower leather collar, an upper pin, a lower pin, a front roller 2 and a front leather roller 1, the double-twist electric winding mechanism for double twisting consists of a double-twist mechanism, a winding mechanism and an electric transmission mechanism, the improved front double-twist mechanism consists of a spindle belt 14, a spindle seat 15, a spindle rod 16, a twisting disc 18, a yarn feeding pipeline, a spindle disc 12, a rotor binder 17, a static disc, a yarn storage tank 26, an inner magnetic steel 20, a spinning frame and a spinning machine, The winding mechanism comprises a supporting seat 8, a winding groove drum 7, a bobbin 4, a pipe sleeve 5, a lifting groove 6 and a heavy hammer 27, and the electric transmission mechanism is arranged in the double-twist winding structure. Through the following first, second and third technical innovations, the two-for-one twisting spinning machine is improved.
Firstly, the invention removes an electric transmission mechanism arranged in a double-twisting electric winding mechanism, changes the double-twisting electric winding mechanism into a double-twisting magnetic winding mechanism consisting of a double-twisting mechanism and a magnetic winding mechanism, solves the technical problems of rapid abrasion and short service cycle of an electric brush mechanism in sliding contact caused by adopting a winding type double-twisting spinning mode of an internal electric mechanism, greatly prolongs the durability of double-twisting high-speed spinning and the durability of components, ensures high-speed, stable and continuous spinning production during double-twisting spinning, and specifically adopts a spinning machine that an external motor 22 is fixedly arranged on a fixed plate 11 of a double-twisting spinning machine in a bilateral symmetry manner, a driving turntable 23 is fixedly arranged at the rotating shaft end of the external motor 22, driven turntables 24 are respectively and fixedly arranged at two ends of the rotating shaft of a winding groove barrel 8, the driving turntable 23 corresponds to the driven turntables 24 oppositely, and the distance between the driving turntable 23 and the driven turntable 24 is 8mm-16mm, permanent magnets 25 evenly distributed along the circumferential direction are respectively embedded on opposite wall surfaces of the driving turntable 23 and the driven turntable 24, the distance between every two adjacent permanent magnets 25 is 0.5mm-5mm, the positive poles and the negative poles of the permanent magnets 25 between every two adjacent permanent magnets are distributed in a staggered mode, the outer end surface of the driving turntable 23 and the outer end surface of the driven turntable 24 are positioned by magnetic force, and the external motor 22 is externally connected with a power supply.
Secondly, the invention adopts the structure that the twisting assisting device 13 is additionally arranged in a yarn inlet pipeline of a twisting disc of a two-for-one twisting magnetic winding mechanism, the twisting assisting device 13 is positioned at the inlet end of the yarn inlet pipeline, the twisting assisting device 13 comprises a yarn holder 131, a twisting assisting tube 132 and a bearing 133, the twisting assisting tube 132 is in a cylindrical column shape, the twisting assisting tube 132 is movably arranged in the yarn inlet pipeline of the twisting disc through the bearing 133, the outer wall of the middle part of the twisting assisting tube 132 is provided with a driving wheel which is in a circular ring shape, the rotating central axis of the driving wheel is superposed with the rotating central axis of the twisting assisting tube 132, the yarn holder 131 is positioned in the twisting assisting tube 132, the yarn holder 131 is composed of a pair of mutually pressed elastic sheets, the root parts of the elastic sheets are fixedly arranged on the inner wall of the yarn inlet end of the twisting assisting tube 132, the crown parts of the elastic sheets are mutually elastically pressed.
Thirdly, a static sliding seat 19 is fixedly and additionally arranged on the lower wall surface of a static disc of the two-for-one twisting magnetic winding mechanism, the static sliding seat 19 is annular, the upper end of the static sliding seat 19 is fixedly arranged at the bottom of the static disc, the lower end of the static sliding seat 19 is positioned in an annular groove formed in the twisting disc 18, a sliding groove at the lower end of the static sliding seat 19 is tightly pressed and contacted with a driving wheel on the twisting-assisted tube 132, and the ratio of the circumference of the sliding groove at the lower end of the static sliding seat 19 to the outer circumference of the driving wheel on the twisting-assisted tube 132 is 2..
Through the second and third technical innovations and improvements, a high-twist area is formed between the yarn clamp holder 131 of the twisting assisting device 13 and the front roller jaw of the drafting system of the two-for-one twisting spinning machine, so that when the twisting disc 18 applies n twists to the yarn between the twisting assisting device 13 and the front roller jaw of the two-for-one twisting spinning machine per minute, the twisting assisting device 13 applies 2.5-7.5 n twists with the same twisting direction to the yarn between the twisting assisting device 13 and the front roller jaw of the two-for-one twisting spinning machine per minute, the yarn with the same twisting direction is ensured to have enough twists in the yarn forming area of the two-for-one twisting spinning, the holding short fibers form the yarn with the yarn body strength larger than the pulling tension, the requirements of continuous and normal twisting of the short fiber strands for forming the yarn are met, the high-twist area yarn forming of the two-for spinning is realized, the low-twist area yarn forming mode of the two-for spinning is changed, and the yarn forming long/composite yarn with, Coarse special yarn, pure short fiber fine special yarn with conventional twist can be produced and spun smoothly, and the range of yarn varieties which can be produced by two-for-one twisting spinning is greatly expanded.
Through the first, second and third technical innovations and improvements, a stable twisting area is formed between the yarn clamp holder 131 of the twisting assisting device 13 and the magnetic winding mechanism, and the twisting assisting device 13 applies 2.5-7.5 n twisting directions to yarns running in the stable twisting area per minute, wherein the twisting directions are opposite to those of the high twisting area, so that the high-twist yarns in the stable twisting area are subjected to the action of 2.5-7.5 n twisting directions of untwisting of the twisting assisting device 13, the residual stress on a yarn main body is released, and the low-torque, soft and reinforced two-for-one twisted yarns are obtained.
After the mechanism is improved, the two-for-one twisting magnetic winder is positioned below a front roller jaw formed by meshing a roller 2 and a front leather roller 1 of a drafting system of a spinning frame, the lower end of a spindle blade 16 is movably inserted into a spindle seat 15, the rod body of the spindle blade 16 is tightly attached to a spindle tape 14, the upper end of the spindle blade 16 is fixedly provided with a twisting disc 18, a yarn feeding pipeline is arranged in the twisting disc 18 and is L-shaped, the inlet of the yarn feeding pipeline is positioned on the circumferential side surface of the twisting disc 18, a twisting assisting device 13 is positioned at the inlet end of the yarn feeding pipeline, the outlet of the yarn feeding pipeline is positioned on the upper end surface of a middle shaft of the twisting disc 18, the shaft center of the spindle disc 12 is superposed with the shaft center of the twisting disc 18, the lower end of a rotor connector 17 is fixed at the center of the upper end surface of the twisting disc 18, the shaft center of the rotor 17 is provided with a yarn feeding channel, the lower end opening of the yarn feeding channel, a static sliding seat 19 is arranged below the static disc, a yarn storage tank 26 is fixedly arranged on the static disc, an inner magnetic steel 20 and a yarn outlet tube are positioned in the yarn storage tank 26, a positioning sleeve 9 is arranged outside the yarn outlet tube, the yarn outlet tube is fixedly arranged on the inner tank bottom of the yarn storage tank 26 through the positioning sleeve 9, a tensioner 10 is arranged in the yarn outlet tube, the axis of the yarn outlet tube is superposed with the axis of a rotor binder 17, the lower port of the yarn outlet tube corresponds to the upper port of a yarn feeding channel of the rotor binder 17, one part of a magnetic winding mechanism without an electric power transmission mechanism is positioned in the yarn storage tank 26 of the double-twisting mechanism, the other part of the magnetic winding mechanism is positioned outside the yarn storage tank 26 of the double-twisting mechanism, the magnetic winding mechanism comprises a supporting seat 8, a winding groove barrel 7, a yarn bobbin 4, a pipe sleeve 5, a weight 27, a lifting groove 6 and an external motor 22, the supporting seat 8 and the winding groove barrel 7 are arranged in the, the inner wall of a yarn storage tank 26 is provided with lifting grooves 6 in bilateral symmetry, the bilateral symmetry lifting grooves 6 are respectively positioned above driven turntables 24 at the left end and the right end of a winding groove drum 7, the lifting grooves 6 are respectively vertically communicated with the driven turntables 23, pipe sleeves 5 are movably arranged in the lifting grooves 6, heavy hammers 27 are arranged on the pipe sleeves 5, two ends of each bobbin 4 are respectively movably sleeved in the pipe sleeves 5, the axis of each bobbin 4 is parallel to the axis of the winding groove drum 7, each bobbin 4 is tightly pressed on the winding groove drum 7, external motors 22 are fixedly arranged on a fixed plate 11 in bilateral symmetry, the rotating shaft end of each external motor 22 is provided with a driving turntable 23, the disc body of each driving turntable 23 is in a solid shape, a frame shape or a hollow shape, when the driving turntable 23 is arranged in the frame shape or the hollow shape, the weight of the rotating body is effectively reduced, the high-speed and low-energy rotation of the driving disc is facilitated, permanent magnets 25 uniformly, the permanent magnet 25 is a metal alloy magnet or a ferrite permanent magnet, wherein the metal alloy magnet comprises a neodymium iron boron magnet, a samarium cobalt magnet and an alnico magnet, the cross section of the permanent magnet 25 is circular, sector, triangle, rectangle, polygon or other shapes, the positive poles of the permanent magnets 25 and the negative poles of the permanent magnets 25 are arranged in a staggered manner, the arrangement shape of the permanent magnets 25 on the outer end face of the driving turntable 23 is circular or polygonal, the distance between the adjacent edge lines of the two adjacent permanent magnets 25 of the positive poles of the permanent magnets 25 and the negative poles of the permanent magnets 25 is 0.5mm-5mm, the smaller the distance, the stronger the magnetic force action of the adjacent permanent magnets 25, the driven turntables 24 are respectively arranged at the two ends of the rotating shaft of the winding groove drum 7, the plate bodies of the driven turntables 24 are solid, frame or hollow, when the driven turntables 24 are arranged, The low-energy-consumption rotary table is characterized in that permanent magnets 25 evenly distributed along the circumferential direction are embedded on the outer end face of a driven rotary table 24, the anodes of the permanent magnets 25 and the cathodes of the permanent magnets 25 are distributed in a staggered mode, the distribution shape of the permanent magnets 25 on the outer end face of the driven rotary table 24 is consistent with the distribution shape of the magnets 25 on the outer end face of a driving rotary table 23, the distance between adjacent edge lines of two adjacent permanent magnets 25 is 0.5-5 mm, the driving rotary table 23 corresponds to the driven rotary table 24 in an opposite mode, the distance between the driving rotary table 23 and the driven rotary table 24 is 5-20 mm, the arrangement of the permanent magnets 25 on the driving rotary table 23 corresponds to the arrangement of the permanent magnets 25 on the driven rotary table 24, the outer end face of the driving rotary table 23 is parallel to the outer end face of the driven rotary table 24, the outer end face of the driving rotary table 23, the smaller the distance between the adjacent edge lines of the two adjacent permanent magnets 25 is, the stronger the magnetic force is, the greater the force of the driving turntable 23 driving the driven turntable 24 is, at this time, the greater the distance between the outer end face of the driving turntable 23 and the outer end face of the driven turntable 24 is, the external motor 22 is externally connected with a power supply to drive the driving turntable 23 to rotate at a high speed; the internal magnetic steel 20 in the yarn storage tank 26 and the external magnetic steel 21 arranged on the fixed plate 11 are mutually attracted, so that the static disc, the yarn storage tank 26 and the yarn outlet pipeline are kept static.
During spinning, an external motor 22 of the magnetic winding mechanism drives a driving turntable 23 to rotate, the rotating driving turntable 23 drives a driven turntable 24 of a winding groove drum 7 to synchronously rotate under the action of magnetic force, a spindle belt 14 of the two-for-one twisting mechanism drives a twisting disc 18 on a spindle rod 16 to rotate at a rotating speed of n revolutions per minute, meanwhile, a twisting assisting device arranged in the twisting disc 18 rotates at a rotating speed of 2.5n-7.5n revolutions per minute, roving unwound from a roving package arranged on a hanging spindle of the hanging mechanism is drafted by a drafting system to form short fiber strands, the short fiber strands are output by a front roller jaw formed by meshing a front roller 2 and a front rubber roller 1 and enter a high twisting area, the short fiber strands in the high twisting area are subjected to double twisting degree effects of the twisting disc 18 and the twisting assisting device, and n + (2.5-7.5) n twists are obtained per minute, twisting and twisting with 1.75-4.25 times of normal design twist to form high twist yarn, passing through the yarn guide hook 3 and the yarn holder 131 of the twisting assisting device 13 in sequence, outputting from the twisting assisting tube 132, entering the yarn inlet pipeline in the twisting disc 18, the yarn running channel in the rotor binder 17, the yarn outlet pipeline in the positioning sleeve 9, running to the tensioner 10 in the yarn outlet pipeline, running in the stable twisting zone, subjecting the high twist yarn in the stable twisting zone to the combined action of twisting by the twisting disc 18 and untwisting by the twisting assisting device, obtaining n- (2.5-7.5) turns newly every minute, superposing and adjusting with n + (2.5-7.5) turns existing on the high twist yarn entering the stable twisting zone every minute, releasing residual stress of yarn, finally obtaining stable state yarn applying 2n normal design turns every minute, spinning 2 times per minute, therefore, the low-efficiency twisting mode that only one twisting turn can be added when the steel wire ring of the common spinning machine rotates for one circle is changed, and the twisting efficiency of the common spinning machine is greatly improved; after being led out from a yarn outlet pipeline by a tensioner 10, the 2-by-one twisted stable-state sliver is wound on a bobbin 4 under the winding action of a winding groove drum 7 in rotary motion to form a cone yarn package, thereby solving the technical bottleneck that the two-by-one twisting spinning technology can not realize high-speed twisting and high-speed winding at the same time and can not realize the two-by-one twisting and yarn forming of short fiber slivers with conventional twist, not only realizing the technical problem that the two-by-one twisting spinning can be carried out for a long time and high-speed cone yarn package, but also realizing the two-by-one twisting spinning production that the short fiber yarns with conventional twist are subjected to yarn forming in a high twisting area, expanding the variety of the two-by-one twisting spinning and.
The invention is adopted to produce pure cotton 14.8 special pure cotton yarn with the twist of 1200 twist/m, 5.4 g/10 m roving is drafted in low times, the roving is output at the linear speed of 20 m/min through a front roller jaw, the ratio of the circumference of a chute at the lower end of a static sliding seat 19 to the outer circumference of a driving wheel on an auxiliary twisting pipe 132 is set to be 2.5 times, the twisting speed of a twisting disc 18 is 12000 turns/min, the twisting direction is Z twist, 12000 turns are applied to the sliver between the auxiliary twisting device 13 and the front roller jaw every minute, simultaneously, the twisting disc 18 drives a sliver holder 131 of the auxiliary twisting device 13, 30000 turns are applied to the sliver between the auxiliary twisting device 13 and the front roller jaw every minute, 30000 turns in Z direction are applied to the sliver in the high twisting area every minute, 42000 turns are obtained, the twist of the sliver is 2100/m (1.75 times of the normal twist of 1200/m), forming a high twist sliver. After the high-twist sliver passes through the twisting assisting device 13, 30000 twists with S twist are applied to the sliver per minute by the twisting assisting device 13, the sliver is substantially untwisted for 30000 twists with Z twist per minute, meanwhile, the twisting disc 18 applies 12000 twists with Z twist per minute to the sliver entering the stable twisting area again at the twisting speed of 12000 turns/minute, 24000 twists are remained on the sliver in the stable twisting area per minute at the moment, and finally the conventional woven yarn with the twist of 1200 twists/meter is formed. In the whole process of single-spindle 5-kilometer cheese double-twist spinning, the spinning has no broken ends; compared with ring spinning yarns with conventional twist, the spun yarns are stable and have small residual torque.
The invention is adopted to produce pure cotton 14.8 special pure cotton yarn with 825 twist/m, 5.4 g/10 m roving is drafted in low times, the roving is output at the linear speed of 20 m/min through a front roller jaw, the ratio of the circumference of a chute at the lower end of a static sliding seat 19 to the outer circumference of a driving wheel on a twisting-assisted pipe 132 is set to be 7.5 times, the twisting speed of a twisting disc 18 is 8250 turns/min, the twisting direction is Z twist, 8250 turns are applied to the sliver between the twisting-assisted device 13 and the front roller jaw every minute, simultaneously, the twisting disc 18 drives a sliver holder 131 of the twisting-assisted device 13, 52500 turns in Z twist direction are applied to the sliver between the twisting-assisted device 13 and the front roller jaw every minute at the rotating speed of 52500 turns/min, at the moment, the sliver in a high-twist area obtains 59500 turns every minute, the twist of the sliver is 2975/m (the twist is 3.6 times of 825 twist/m normal design), forming a high twist sliver. After passing through the twisting assisting device 13, the high-twist sliver is subjected to 52500 twists with S twist direction per minute by the twisting assisting device 13, and is substantially subjected to 52500 twists with Z twist direction per minute for untwisting the sliver, and meanwhile, the twisting disc 18 applies 8250 twists with Z twist direction per minute again to the sliver entering the stable twisting zone at the twisting speed of 8250 revolutions per minute, and 16500 twists are reserved on the sliver in the stable twisting zone per minute at the moment, and finally the soft knitting yarn with the twist of 825 twists per meter is formed. In the whole process of single-spindle 5-kilometer cheese double-twist spinning, the double-twist spinning area has no broken end; compared with ring spun yarns with conventional twist, the spun yarns are stable, the residual torque is almost zero, and the yarn strength is improved by 3.2%.
Claims (1)
1. A high-twist-zone yarn forming method of double-twist spinning comprises a double-twist spinning machine consisting of a drafting system, a hanging mechanism and a double-twist electric winding mechanism, and is characterized in that: the electric transmission mechanism arranged in the double-twisting electric winding mechanism is removed, the double-twisting electric winding mechanism is changed into a double-twisting magnetic winding mechanism consisting of the double-twisting mechanism and the magnetic winding mechanism, external motors (22) are fixedly arranged on a fixed plate (12) in a bilateral symmetry mode, driving turntables (23) are fixedly arranged at rotating shaft ends of the external motors (22), driven turntables (24) are fixedly arranged at two rotating shaft ends of a winding groove drum (8) respectively, the driving turntables (23) correspond to the driven turntables (24) in an opposite mode, the distance between the driving turntables (23) and the driven turntables (24) is 8-16 mm, permanent magnets (25) uniformly distributed in the circumferential direction are inlaid on opposite wall surfaces of the driving turntables (23) and the driven turntables (24) respectively, the distance between adjacent permanent magnets (25) is 0.5-5 mm, and the positive poles of the permanent magnets (25) between adjacent permanent magnets, The cathodes are arranged in a staggered manner, the outer end face of the driving turntable (23) and the outer end face of the driven turntable (24) are positioned by magnetic force, and the external motor (22) is externally connected with a power supply;
the twisting assisting device (13) is additionally arranged in a yarn feeding pipeline of a twisting disc of the two-for-one twisting magnetic winding mechanism, the twisting assisting device (13) is positioned at the inlet end of the yarn feeding pipeline, the twisting assisting device (13) is composed of a yarn clamp holder (131), a twisting assisting pipe (132) and a bearing (133), the twisting assisting pipe (132) is in a circular pipe column shape, the twisting assisting pipe (132) is movably arranged in the yarn feeding inlet end pipeline in the twisting disc through the bearing (133), a driving wheel is arranged on the outer wall of the middle part of the twisting assisting pipe (132) and is in a circular ring shape, the rotating central axis of the driving wheel is superposed with the rotating central axis of the twisting assisting pipe (132), the yarn clamp holder (131) is positioned in the twisting assisting pipe (, the yarn holder (131) is composed of a pair of mutually pressed elastic sheets, the root parts of the elastic sheets are fixedly arranged on the inner wall of the yarn inlet end of the twisting-assistant tube (132), the crown parts of the elastic sheets are mutually elastically pressed, and the elastic pressing parts face the yarn outlet end of the twisting-assistant tube (132);
a static sliding seat (19) is fixedly additionally arranged on the lower wall surface of a static disc of the two-for-one twisting magnetic winding mechanism, the static sliding seat (19) is in a circular ring shape, the upper end of the static sliding seat (19) is fixedly arranged at the bottom of the static disc, the lower end of the static sliding seat (19) is positioned in an annular groove formed in the twisting disc (18), a sliding groove at the lower end of the static sliding seat (19) is in close pressure contact with a driving wheel on a twisting-assisted tube (132), and the ratio of the circumference of the sliding groove at the lower end of the static sliding seat (19) to the outer circumference of the driving wheel on the twisting-assisted tube;
a high-twist area is formed between a yarn clamp (131) of the twisting assisting device (13) and a front roller jaw of a drafting system of the two-for-one twisting spinning machine;
a stable twisting area is formed between the yarn clamp holder (131) of the twisting assisting device (13) and the magnetic winding mechanism;
during spinning, an external motor (22) of the magnetic winding mechanism drives a driving turntable (23) to rotate, the driving turntable (23) which rotates drives a driven turntable (24) of a winding groove drum (7) to synchronously rotate under the action of magnetic force, a spindle belt (14) of the two-for-one twisting mechanism drives a twisting disc (18) on a spindle rod (16) to rotate at the speed of n revolutions per minute, a twisting assisting device arranged in the twisting disc (18) rotates at the speed of 2.5n-7.5n revolutions per minute, roving unwound from a roving roll arranged on a hanger of the hanging mechanism is drafted by a drafting system to become short fiber strands, the short fiber strands are output from a front roller jaw formed by meshing a front roller (2) and a front rubber roller (1) and enter a high twisting area, and the short fiber strands in the high twisting area are twisted by the twisting disc (18), The twisting assisting device (13) performs twisting action on double twisting aids to obtain n + (2.5-7.5) n turns per minute, twisting and twisting are carried out with 1.75-4.25 times of normal designed twist to form high-twist yarn strips, the high-twist yarn strips sequentially pass through the yarn guide hook (3), the yarn clamp holder (131) of the twisting assisting device (13), are output by the twisting assisting tube (132), sequentially enter the yarn inlet pipeline in the twisting disc (18), the yarn running channel in the rotor connector (17), the yarn outlet pipeline in the positioning sleeve (9), the tensioner (10) running into the yarn outlet pipeline, run in the stable twisting area, the high-twist yarn strips in the stable twisting area are twisted by the twisting disc (18) and are untwisted by the twisting assisting device, n- (2.5-7.5) n turns are newly obtained per minute and are overlapped with the n + (2.5-7.5) n turns which are already adjusted to the high-twist yarn strips entering the stable area per minute to perform twisting and then are overlapped with n + (2.5-7.5) turns, Releasing the residual stress of the yarn body, finally obtaining a stable sliver applying 2n normal designed turns per minute, carrying out 2-fold twist stable spinning, leading the 2-fold twisted stable sliver out from a yarn outlet pipeline through a tensioner (10), and winding the stable sliver on a bobbin (4) under the winding action of a winding groove drum (7) in rotary motion to form a bobbin yarn package.
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| CN114032630A (en) * | 2021-10-13 | 2022-02-11 | 海宁市欧师达经编有限公司 | Yarn twisting structure |
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