Yarn stranding device and method

Abstract

The invention relates to a yarn plying method. Firstly, multiple strands of yarn are combined into one strand through a doubling mechanism; then the stranded yarn is wound on a bobbin under the cooperation of a lifting mechanism and a yarn winding mechanism, the upper portion of the bobbin is in an inverted cone shape, and the lower portion of the bobbin is in a cylindrical shape; the outer contour of the top conical part of the yarn is wound into a conical shape or a cylindrical shape through a yarn plying method, a chamfer at the upper part of the bobbin can be filled, the forming is full, and the knocking-over is avoided during yarn reeling. In order to achieve the yarn plying method, the invention further provides a yarn plying device, after being doubled through the doubling mechanism, multiple strands of yarn are wound around the nylon hook on the steel collar plate and then wound around the bobbin, the yarn after being doubled is wound around the bobbin along with the up-down movement of the steel collar plate and matched with the rotation of the bobbin, and the yarn after being doubled is wound around the bobbin. A bobbin is fixedly arranged on the spindle; the upper reversing switch and the lower reversing switch are used for controlling the steel collar plate to reverse at the upper end and the lower end of the bobbin. The steel collar plate can be quickly reversed when moving to the highest position and the lowest position, and yarn accumulation is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of textiles, and particularly relates to a yarn doubling device and method. Background Art

[0002] The existing doubling machines use cams to control the lifting of the ring rail plate, which has two disadvantages: 1. After the cams are worn, the ring rail plate cannot be lifted or lowered in place, the commutation is not timely, and it is prone to jerks in the middle, resulting in poor doubling and forming. 2. The top of the doubling yarn tube has an inverted conical chamfer, and the yarn cannot fill the chamfer, resulting in easy loop-off during winding. Therefore, it is necessary to transform the forming mechanism of the doubling machine for the above two problems. Transformation objectives: 1. The ring rail plate can quickly commutate when moving to the highest and lowest positions to avoid yarn accumulation. 2. When the ring rail plate moves to the highest position, it can fill the chamfer of the yarn tube to make the forming full and prevent loop-off during winding. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a yarn doubling method and a yarn doubling device for realizing the doubling method, so that the ring rail plate can realize automatic commutation, avoid yarn accumulation, make the yarn tube form full, improve the product quality, and prevent loop-off during winding.

[0004] To solve the above problems, the technical solutions adopted by the present invention are as follows: A yarn doubling method, which includes the following steps: First, merge multiple yarns into one yarn through a doubling mechanism; Then, wind the doubled yarn onto a yarn tube under the cooperation of a lifting mechanism and a winding mechanism, where the upper part of the yarn tube is in an inverted conical shape and the lower part is in a cylindrical shape; When winding the yarn onto the yarn tube, control the rotation of the yarn tube through a rotating mechanism in the winding mechanism, and at the same time control the ring rail plate to move downward until the lower commutation switch is triggered by the lifting mechanism. The lifting mechanism controls the ring rail plate to move upward after commutation until the upper ring switch is triggered. This is a small cycle. Record this cycle through the central control PLC and record the maximum displacement of the ring rail plate moving upward in this cycle; in subsequent small cycles, the maximum displacement of the ring rail plate moving upward gradually decreases until the ring rail plate just reaches the junction of the cylindrical part and the conical part of the yarn tube when moving upward to the maximum displacement. Call the number of small cycles at this time a large cycle; Next, the maximum displacement of the ring rail plate moving upward in each small cycle gradually increases compared with the previous small cycle until the upper commutation switch is triggered by the ring rail plate. At this time, the number of small cycles of the next movement is also a large cycle. After several large cycles, the yarn in the cylindrical part at the lower part of the yarn tube is wound into a normal cylindrical shape, and the outer contour of the yarn in the conical part at the top is wound into a conical or cylindrical shape.

[0005] As an embodiment of the present invention, if the height of the conical part is H millimeters and the diameter of the yarn is L millimeters, the maximum displacement change of each small cycle moving upward relative to the previous small cycle is L millimeters, and the number of small cycles in one large cycle is H / L.

[0006] As an embodiment of the present invention, in order to make the yarn wound on the conical part regular and full, by adjusting the rotation speed of the yarn tube, the yarn wound on the conical part tends to be cylindrical.

[0007] A yarn doubling device for realizing the above-mentioned yarn doubling method, which includes a doubling mechanism, a winding mechanism and a lifting mechanism. The doubling mechanism is used to combine multiple yarns together. The winding mechanism and the lifting mechanism cooperate to wind the combined multiple yarns on the yarn tube. The lower part of the yarn tube is cylindrical and the upper end is an inverted cone. The winding mechanism includes a vertically arranged spindle, a rotating mechanism for driving the spindle to rotate, and a ring traveler plate arranged outside the spindle. An avoidance hole is arranged in the middle of the ring traveler plate, and a ring-shaped limiting plate is arranged at the edge of the avoidance hole. A nylon hook that can rotate along the limiting plate is arranged on the limiting plate. The ring traveler plate is connected to the lifting mechanism. A yarn guiding porcelain cup is arranged directly above the spindle. The yarn tube is fixedly arranged on the spindle; it also includes an upper commutation switch and a lower commutation switch for controlling the commutation of the ring traveler plate at the upper and lower ends of the yarn tube.

[0008] As an embodiment of the present invention, the ring traveler plate is connected to a connecting plate. A plurality of winding mechanisms are arranged horizontally and evenly. The connecting plates of the plurality of winding mechanisms are connected to the same lifting plate. The lifting mechanism is used to drive the lifting plate to move up and down.

[0009] As an embodiment of the present invention, the lifting mechanism includes a driving sprocket, a steering sprocket, a driven sprocket, a double sprocket and a transmission sprocket. The double sprocket is arranged on the first distribution shaft. A driven sprocket is installed at one end of the first distribution shaft close to the steering sprocket. The transmission sprocket is arranged on the second distribution shaft. The driving sprocket is installed on the output shaft of the servo motor. A first chain is fixedly arranged on the driving sprocket. The other end of the first chain is fixedly connected to the driven sprocket after passing around the steering sprocket. A load-bearing chain is fixedly arranged on the double sprocket. The lower end of the load-bearing chain is connected to a counterweight. A lifting chain is fixedly arranged on the double sprocket. The lifting chain is connected to the lifting plate after passing around the transmission sprocket. A plurality of guiding holes are arranged on the lifting plate, and guiding rods are vertically arranged in the guiding holes.

[0010] As an embodiment of the present invention, two rows of the wire merging mechanism and the wire winding mechanism are symmetrically arranged, and the lifting mechanism is arranged between the two rows of wire winding mechanisms; two double sprockets and two driving sprockets are provided, the two double sprockets are arranged at both ends of the first distribution shaft, the two driving sprockets are arranged at both ends of the second distribution shaft, one load-bearing chain is fixedly connected to each of the two double sprockets, one lifting chain is fixedly connected to each of the two double sprockets, and the two lifting chains are respectively connected to two lifting plates in the two symmetrically arranged winding mechanisms.

[0011] As an embodiment of the present invention, the upper commutation switch and the lower commutation switch are proximity switches arranged on the side surfaces of the upper and lower ends of the yarn bobbin for detecting the position of the ring rail, or, the upper commutation switch and the lower commutation switch are proximity switches arranged on the side surface of the lifting plate for detecting the position of the lifting plate, or, The output shaft of the servo motor is coaxially fixedly connected with an extension shaft, a detection block is arranged on the extension shaft, and a limit switch is arranged around the extension shaft to sense the position of the detection block, thereby controlling the forward and reverse rotation directions and angles of the output shaft.

[0012] As an embodiment of the present invention, the wire merging mechanism includes a plurality of first mounting plates uniformly arranged along the vertical direction and a yarn inserting seat arranged on the first mounting plate for mounting the cheese yarn, a second mounting plate is arranged below the first mounting plate, a C-shaped or L-shaped fifth mounting bracket is mounted on the second mounting plate, a yarn guiding rod corresponding to the yarn inserting seat one by one is arranged on the fifth mounting bracket, and a spiral part is arranged at the lower end of the yarn guiding rod; a fourth mounting bracket is arranged below the second mounting plate, three yarn break self-stoppers are horizontally arranged on the fourth mounting bracket, a comb tooth plate is arranged at the front part of the yarn break self-stopper, and two extrusion rollers in contact with each other are arranged below the comb tooth plate, and one of the extrusion rollers is in contact with a driving roller, and the rotating shaft of the driving roller is connected with a rotating mechanism.

[0013] As an embodiment of the present invention, an upper stop switch and a lower stop switch are further included for limiting the extreme positions of the up and down movement of the ring rail.

[0014] The beneficial effects produced by adopting the above technical solution are as follows: In the yarn doubling method provided by the present invention, multiple yarns are first merged into one by the wire merging mechanism; then, the doubled yarn is wound onto the yarn bobbin under the cooperation of the lifting mechanism and the wire winding mechanism, wherein the upper part of the yarn bobbin is in an inverted conical shape and the lower part is in a cylindrical shape; by the yarn doubling method, the outer contour of the yarn at the top conical part is wound into a conical or cylindrical shape, which can fill the chamfer at the upper part of the yarn bobbin, make the molding full, and prevent the yarn from slipping out of the loop during winding.

[0015] In order to implement the above-mentioned yarn doubling method, the present invention also provides a yarn doubling device. After multiple strands of yarn are doubled through the doubling mechanism, they bypass the nylon hooks on the ring rail and are wound around the yarn bobbin. As the ring rail moves up and down in cooperation with the rotation of the yarn bobbin, the doubled yarn is wound around the yarn bobbin. The ring rail can quickly reverse when it moves to the highest and lowest positions, avoiding yarn accumulation.

[0016] After the transformation, due to the stable operation, accurate and timely commutation of the servo motor, the yarn is regular and plump, the yarn bobbin has no large head or large bottom, the yarn weight has increased by 10%. This not only reduces the number of joints and improves the product quality, but also reduces the labor intensity of workers, and also avoids unnecessary waste caused by the loop-off of the large head or large bottom during the winding process. Brief Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the present invention.

[0018] Figure 2 is a schematic structural diagram of the present invention from another angle.

[0019] Figure 3 is a schematic structural diagram of the lifting mechanism in the present invention.

[0020] Figure 4 is a schematic structural diagram of the lifting mechanism in the present invention from another angle.

[0021] Figure 5 is a schematic structural diagram of the doubling mechanism and the winding mechanism in the present invention.

[0022] Figure 6 is a schematic structural diagram of a set of doubling mechanism and winding mechanism in the present invention.

[0023] Figure 7 is a schematic structural diagram of a set of doubling mechanism and winding mechanism in the present invention from another angle.

[0024] Figure 8 is a schematic structural diagram of a set of doubling mechanism and winding mechanism in the present invention from another angle.

[0025] Figure 9 is a schematic structural diagram of the winding mechanism in the present invention.

[0026] Figure 10 is a schematic structural diagram of the yarn bobbin in the present invention.

[0027] Wherein: 1 wall panel, 2 trough, 3 first mounting bracket, 4 steering sprocket, 5 second mounting bracket, 6 driving sprocket, 7 servo motor, 8 extension shaft, 9 limit switch, 901 mounting frame, 10 first chain, 11 first distribution shaft, 1101 driven sprocket, 12 double sprocket, 13 load-bearing chain, 14 counterweight, 15 second distribution shaft, 16 drive sprocket, 17 lifting chain, 18 first mounting plate, 19 yarn inserting seat, 20 tube yarn, 21 second mounting plate, 22 fifth mounting bracket, 23 yarn guide rod, 2301 spiral part, 24 roller, 25 third mounting bracket, 26 self-stop needle, 27 comb tooth plate, 28 cross bar, 29 squeezing roller, 30 fourth mounting bracket, 31 driving roller, 32 rotating shaft, 33 yarn guiding porcelain cup, 34 third mounting plate, 35 baffle plate, 36 guiding groove, 37 ring rail, 3701 avoidance hole, 38 limit block, 39 guiding ring, 40 limit plate, 41 nylon hook, 42 spindle, 43 yarn bobbin, 4301 cylindrical part, 4302 conical part, 44 placing table, 45 rotating mechanism, 46 connecting plate, 47 lifting plate, 48 guiding rod. Detailed implementation manners

[0028] To make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be clearly and completely described below in conjunction with specific embodiments.

[0029] In order to make the yarn form regularly and plumply on the yarn bobbin 43, increase the yarn weight, improve the quality and prevent the yarn from slipping out of the coil during winding, the present invention provides a method for doubling yarns, which includes the following steps: First, merge multiple strands of yarns into one strand through a doubling mechanism; Then, wind the doubled yarn onto the yarn bobbin 43 under the cooperation of a lifting mechanism and a winding mechanism, wherein the upper part of the yarn bobbin 43 is in an inverted conical shape and the lower part is in a cylindrical shape; When winding the yarn onto the yarn bobbin 43, control the rotation of the yarn bobbin 43 through the rotating mechanism 45 in the winding mechanism. First, control the ring rail 37 to move downward to the lowest position through the lifting mechanism, trigger the lower commutation switch, and the lower commutation switch sends a signal to the central control PLC. The lifting mechanism controls the ring rail 37 to move upward after commutation until the upper ring switch detects the ring rail 37. The upper commutation switch sends a signal to the central control PLC, and the ring rail 37 moves downward next. This is a small cycle. Record this cycle through the central control PLC and record the maximum displacement of the upward movement of the ring rail 37 in this cycle; in subsequent small cycles, the maximum displacement of the upward movement of the ring rail 37 gradually decreases until the ring rail 37 just reaches the junction of the cylindrical part 4301 and the conical part 4302 of the yarn bobbin 43 when moving upward to the maximum displacement. The number of small cycles at this time is called a large cycle; Next, the maximum upward displacement of the ring rail 37 in each small cycle gradually increases compared to the previous small cycle until the upper reversing switch can detect the ring rail 37 again. At this time, the number of small cycles of the next movement is also one large cycle. After several large cycles, the yarn on the cylindrical part 4301 at the lower part of the bobbin 43 is wound into a normal cylindrical shape, and the outer contour of the yarn on the top conical part 4302 is wound into a conical or cylindrical shape. Through the above-mentioned yarn doubling method, the chamfer at the upper part of the bobbin 43 can be filled, making the molding full and preventing the yarn from slipping off the bobbin during winding.

[0030] In this embodiment, let the height of the conical part 4302 be H millimeters and the diameter of the yarn be L millimeters. Then, the change in the maximum upward displacement of each small cycle relative to the previous small cycle is L millimeters, and the number of small cycles in one large cycle is H / L.

[0031] As a further optimization, to make the yarn wound on the conical part 4302 regular and full, by adjusting the rotation speed of the bobbin 43, the yarn wound on the conical part 4302 tends to be cylindrical.

[0032] The following is an example to illustrate: The conical part 4302 is actually a frustum of an inverted cone, and the taper = (upper base diameter - lower base diameter) ÷ height. Taking the cone angle = 90 degrees, that is, the taper = 2 as an example, let the height of the conical part 4302 be 10 mm, the diameter of the doubled yarn be 1 mm, and the maximum displacement change at the upper part of the ring rail 37 in each cycle be 1 mm. After 1 large cycle, that is, 10 cycles, the entire bobbin 43 can be wound with yarn. Among them, the outer contour of the yarn on the upper conical part 4302 is conical, and the outer contour of the yarn on the lower cylindrical part 4301 is cylindrical. If the taper of the conical part 4302 = 4, the outer contour of the yarn on the conical part can be cylindrical, and the outer contour of the yarn on the entire bobbin 43 is cylindrical. The premise of the above example is that when the ring rail 37 moves 1 mm, the bobbin 43 rotates one circle. If the ring rail 37 moves 1 mm and the bobbin 43 rotates half a circle, when the taper of the conical part 4302 = 2, one large cycle can make the outer contour of the conical part 4302 cylindrical. In this example, during the process of the ring rail 37 rising and falling 1 mm, the spindle 42 rotates 3 - 5 circles, and at the same time, the nylon hook 41 rotates 2 - 4 circles. The speed difference between the spindle 42 and the nylon hook 41 makes the yarn wind one circle on the bobbin 43.

[0033] Therefore, by adjusting the rotation speed of the yarn bobbin 43, the outer contour of the yarn on the tapered portion 4302 can be adjusted. During specific operation, according to the taper size of the upper tapered portion 4302 of the yarn bobbin 43 and the rotation speed of the rotating mechanism 45, the chamfer at the upper part of the yarn bobbin 43 is filled to make the molding regular and full. The faster the yarn bobbin 43 rotates, the more the yarn wound around the tapered portion 4302 tends to be a positive cone, and vice versa, it tends to be an inverted cone. In order to make the yarn wound around the tapered portion 4302 regular and full, it is better to adjust the rotation speed of the yarn bobbin 43 so that the yarn wound around the tapered portion 4302 tends to be cylindrical.

[0034] In addition, the present invention also provides a yarn doubling device for implementing the above-mentioned yarn doubling method, as Figure 1 , Figure 2 and Figures 5 - 10 shown. It includes a wire merging mechanism, a winding mechanism, and a lifting mechanism. The wire merging mechanism is used to merge multiple strands of yarn together. The winding mechanism and the lifting mechanism cooperate to wind the merged multiple strands of yarn around the yarn bobbin 43. The lower part of the yarn bobbin 43 is cylindrical, and the upper end is inverted conical. The winding mechanism includes a vertically arranged spindle 42, a rotating mechanism for driving the spindle 42 to rotate, and a ring rail plate 37 arranged outside the spindle. A relief hole 3701 is provided in the middle of the ring rail plate 37. A circular limiting plate 40 is provided at the edge of the relief hole 3701. A nylon hook 41 that can rotate along the limiting plate 40 is provided on the limiting plate 40. The ring rail plate 37 is connected to the lifting mechanism. A yarn guiding porcelain cup 33 for guiding the yarn is provided directly above the spindle 42. The yarn bobbin 43 is fixedly provided on the spindle 42. It also includes an upper commutation switch and a lower commutation switch for controlling the commutation of the ring rail plate 37 at the upper and lower ends of the yarn bobbin 43.

[0035] In the yarn doubling device provided by the present invention, after multiple strands of yarn are merged by the wire merging mechanism, they are wound around the yarn bobbin 43 after passing around the nylon hook 41 on the ring rail plate 37. As the ring rail plate 37 moves up and down in cooperation with the rotation of the yarn bobbin 43, the merged yarn is wound around the yarn bobbin 43. The ring rail plate 37 can quickly commutate when moving to the highest and lowest positions, avoiding yarn accumulation.

[0036] After the transformation, due to the stable operation, accurate and timely commutation of the servo motor 7, the yarn is regular and full, the yarn bobbin 43 has no large head or large bottom, the yarn weight has increased by 10%. It not only reduces the number of joints and improves the product quality, but also reduces the labor intensity of workers, and also avoids unnecessary waste caused by the large head or large bottom falling out of the loop during the winding process.

[0037] As Figure 5As shown, the ring rail 37 is connected to the connecting plate 46. A plurality of winding mechanisms are arranged uniformly along the horizontal direction. The connecting plates 46 of the plurality of winding mechanisms are connected to the same lifting plate 47. The lifting mechanism is used to drive the lifting plate 47 to move up and down.

[0038] As Figure 3 and Figure 4 As shown, the lifting mechanism includes a driving sprocket 6, a steering sprocket 4, a driven sprocket 1101, a double sprocket 12 and a transmission sprocket 16. The double sprocket 12 is arranged on the first distribution shaft 11. A driven sprocket 1101 is installed at one end of the first distribution shaft 11 close to the steering sprocket 4. The transmission sprocket 16 is arranged on the second distribution shaft 15. The driving sprocket 6 is installed on the output shaft of the servo motor 7. A first chain 10 is fixed on the driving sprocket 6. The other end of the first chain 10 is wound around the steering sprocket 4 and then fixed to the driven sprocket 1101. A load-bearing chain 13 is fixed on the double sprocket 12. The lower end of the load-bearing chain 13 is connected to a counterweight 14. A lifting chain 17 is fixed on the double sprocket 12. The lifting chain 17 is wound around the transmission sprocket 16 and then connected to the lifting plate 47. A plurality of guide holes are provided on the lifting plate 47, and guide rods 48 are vertically arranged in the guide holes to guide the lifting plate 47 to perform vertical displacement. The servo motor 7 is fixedly arranged on the vertically arranged wall panel 1 through a second mounting bracket 5. An over groove 2 is provided on the wall panel 1 above the servo motor 7. The steering sprocket 4 is installed at the over groove 2 through a first mounting bracket 3. The first distribution shaft 11 and the second distribution shaft 15 are installed on the frame, and are respectively located on both sides of the wall panel 1 with the servo motor 7.

[0039] In this embodiment, two rows of parallel winding mechanisms and winding mechanisms are symmetrically arranged. The lifting mechanism is arranged between the two rows of winding mechanisms. Two double sprockets 12 and two transmission sprockets 16 are provided. The two double sprockets 12 are arranged at both ends of the first distribution shaft 11. The two transmission sprockets 16 are arranged at both ends of the second distribution shaft 15. One load-bearing chain 13 is fixed on each of the two double sprockets 12. One lifting chain 17 is fixed on each of the two double sprockets 12. The two lifting chains are respectively connected to two lifting plates 47 in the two rows of symmetrically arranged winding mechanisms. Since the ring rail 37, the connecting plate 46 and the lifting plate 47 are heavy, the counterweight 14 can balance the forward and reverse forces of the servo motor 7. One set of lifting mechanism drives the lifting plates 47 in the two rows of winding mechanisms to lift and lower. The structural design is reasonable and the floor space is saved. During actual operation, the number of rotation circles of the output shaft of the servo motor 7 is less than one circle, generally half a circle forward and half a circle reverse, to realize the lifting and lowering of the lifting plate 47. The radius of the double sprocket 12 is greater than the radius of the driven sprocket 1101. The displacement of the lifting chain 17 is amplified by the radius ratio of the driven sprocket 1101 and the double sprocket 12.

[0040] In this embodiment, the upper commutation switch and the lower commutation switch are two limit switches 9. An extension shaft 8 is coaxially and fixedly connected to the output shaft of the servo motor 7. A detection block is arranged on the extension shaft 8, and a mounting frame 901 is arranged around the extension shaft 8. Two limit switches 9 are arranged on the mounting frame 901 to sense the position of the detection block, so as to control the forward and reverse rotation directions and angles of the output shaft. In addition, two limit switches 9 are also arranged on the mounting frame 901 as the upper stop switch and the lower stop switch to limit the extreme positions of the up and down movement of the ring rail 37, prevent the ring rail 37 from overshooting and causing the top and bottom to protrude when the central control PLC fails, and stop the whole machine.

[0041] As a further optimization, baffles 35 are vertically arranged on the left and right sides of the ring rail 37. Guide grooves 36 are formed in the baffles 35 along the vertical direction. A limit block 38 that can slide up and down along the guide grooves 36 is fixedly connected to the left or right side of the ring rail 37. The upper commutation switch and the lower commutation switch can also be proximity switches arranged on the side surfaces of the upper and lower ends of the bobbin 43 and installed on the baffle 35 to detect the position of the ring rail 3. Alternatively, the upper commutation switch and the lower commutation switch are proximity switches arranged on the side surface of the lifting plate 47 to detect the position of the lifting plate 47. For the above two setting methods of the commutation switches, the upper stop switch and the lower stop switch are respectively arranged above the upper proximity switch and below the lower proximity switch to limit the extreme positions of the up and down movement of the ring rail 37.

[0042] The lifting mechanism can also adopt an electric screw or a telescopic oil cylinder that directly controls the lifting of the lifting plate 47.

[0043] Such as Figures 6 - 8As shown, the merging mechanism includes a plurality of first mounting plates 18 uniformly arranged along the vertical direction and a yarn inserting seat 19 arranged on the first mounting plate 18. The yarn inserting seat 19 is used to mount a cheese 20. A second mounting plate 21 is arranged below the first mounting plate 18. A C-shaped or L-shaped fifth mounting bracket 22 is mounted on the second mounting plate 21. The horizontal part of the fifth mounting bracket 22 is fixedly connected to the second mounting plate 21. Guide yarn rods 23 corresponding to the yarn inserting seats 19 one by one are arranged on the vertical part of the fifth mounting bracket 22. The upper ends of the guide yarn rods 23 are fixed on the vertical part, and spiral parts 2301 are arranged at their lower ends, so that the yarn bypasses from the spiral parts 2301 to prevent the yarn from knotting. The yarn can be wound around the guide yarn rods 23 several times before bypassing from the spiral parts 2301 to prevent the yarn from loosening and producing jitter. A fourth mounting bracket 30 is arranged below the second mounting plate 21. Three yarn break stop devices are horizontally arranged on the fourth mounting bracket 30. A comb plate 27 is arranged at the front of the yarn break stop device. A plurality of combs are uniformly arranged at the top of the comb plate 27. Two squeezing rollers 29 in contact with each other are arranged below the comb plate 27. One of the squeezing rollers 29 is in contact with a driving roller 31. The rotating shaft 32 of the driving roller 31 is connected to a rotating mechanism. The comb plate 27 and the squeezing rollers 29 are both arranged on the fourth mounting bracket 30.

[0044] As a further optimization, a third mounting bracket 25 is mounted below the fifth mounting bracket 22 on the second mounting plate 21. The third mounting bracket 25 is located above the yarn break stop device. Two rollers 24 are mounted on the third mounting bracket 25. The upper roller 24 is located behind the lower roller 24. The yarn bypasses from behind the upper roller 24 and then from the front of the lower roller 24, so that the yarn can be smoothly conveyed to prevent the yarn from loosening and jittering. A cross bar 28 is horizontally arranged at the front of the yarn break stop device on the fourth mounting bracket 30, so that the yarn bypasses from above the cross bar 28 after passing through the comb plate 17, and then bypasses downward from the front of the upper squeezing roller 29, the rear of the lower squeezing roller 29, and the front of the driving roller 31. The cross bar 28 is not necessarily provided. The lower squeezing roller 29 is in contact with the driving roller 31. Preferably, the axes of the two upper squeezing rollers 29 and the driving roller 31 are located in the same vertical plane. A driving mechanism is arranged on the fourth mounting bracket 30, which can separate the squeezing roller 29 on the fourth mounting bracket 30 from the driving roller 31. This is a conventional technical means and will not be elaborated here.

[0045] The broken yarn self-stop device is a commonly used mechanism in the spinning field. When the yarn runs out or breaks, it stops the yarn from being conveyed. As an implementation, the broken yarn self-stop device includes a self-stop needle 26 with a ring-shaped upper end. During spinning, the self-stop needle 26 is suspended by the yarn. When the yarn runs out or breaks, the self-stop needle 26 naturally drops and is pushed by the beater on the self-stop shaft. Through the connecting rod, the clutch in the spindle 42 is pulled, causing the yarn bobbin 43 to stop rotating. At the same time, through the drive mechanism, the fourth mounting bracket 30 is tilted, causing the squeezing roller 29 to disengage from the driving roller 31 and stopping the operation of the yarn.

[0046] A placing table 44 is fixedly provided at the bottom of the spindle 42. A keyway is provided at the bottom of the yarn bobbin 43, and a key corresponding to the keyway is provided at the top of the placing table 44. After the yarn bobbin 43 is sleeved on the spindle 42, the keyway and the key are engaged together, and the yarn bobbin 43 can rotate with the spindle 42. The spindle 42 is composed of an external spindle tube and an internal spindle core. The clutch is provided in the placing table 44. During spinning, the spindle tube and the spindle core are combined together under the action of the clutch and drive the yarn bobbin 43 to rotate together. After the yarn runs out or breaks, the clutch separates the spindle tube and the spindle core, and only the spindle core rotates. The above is the basic principle of the spindle 42, which is a conventional technical means in this field and will not be elaborated here.

[0047] The rotating mechanism 45 includes a spindle disk connected to the bottom of the spindle core. The spindle disk is coaxially connected to the spindle core and is supported at the bottom by a bearing inside the spindle foot. It is connected to the main shaft under the action of the spindle belt. Two spindles on each side of the lifting mechanism are grouped together, and the four spindles 42 rotate under the drive of the main shaft. The rotating mechanism 45 is a conventional technical means and will not be elaborated here.

[0048] The nylon hook 41 is made of nylon. It is hooked on the limiting plate 40 through an opening hook. The nylon hook 41 can be pulled to rotate around the limiting plate 40 on the ring rail 37, and there is friction between them. The friction is generated by the friction between the nylon hook 41 and the ring rail 37. The magnitude of the friction is closely related to the weight of the nylon hook 41 itself and the pulling force of the yarn on the nylon hook 41. If the nylon hook 41 is not properly selected or the speed of the spindle 42 is not reasonably designed, there will be problems such as an unsatisfactory contact position between the nylon hook 41 and the ring rail 37 and inappropriate friction. The nylon hook 41 should be selected in combination with the yarn thickness and the speed of the spindle 42 to ensure the magnitude of the friction between the nylon hook 41 and the ring rail 37. According to the thickness of the yarn and the speed of the spindle 42, models with different weights are used to ensure that there is appropriate friction between the nylon hook 41 and the limiting plate 40. When the yarn is thick, the centrifugal force generated during rotation is large, so a heavier nylon hook is used to ensure the friction. If the twist is small and the spindle 42 rotates slowly, if the yarn is to be wound on the yarn bobbin, there must be a large enough dragging force. To increase the friction, a heavier nylon hook 41 is also required.

[0049] The working principle of the doubling machine is as follows: The rollers (pressing roller 29 and driving roller 31) control the movement of the yarn. The yarn moves about 30 meters per minute. The spindle speed is 2000 - 4000 revolutions per minute (specifically set according to the twist), driving the yarn to rotate. Since the yarn is controlled by the rollers and does not rotate at the upper end of the spindle 42, the twist is increased, causing multiple strands of yarn to be twisted together. The rotation speed of the nylon hook 41 around the limit plate 40 is lower than that of the yarn bobbin 43, and the yarn is wound around the yarn bobbin 43, thus realizing the twisting and winding of the yarn at the same time. Among them, the twist of the yarn is determined by the process and is immutable. The only variable is the vehicle speed (the rotation speed of the spindle 42). The overall lifting speed of the ring rail 37 is also adjustable, but generally not adjusted. Because the lifting speed of the ring rail 37 is related to the twist. When the twist is small, the lifting speed is fast, which exactly meets the winding requirements. Unless the number of strands of the combined yarn is too large or too small, it is only appropriately adjusted.

[0050] Specific working mode: First, the yarns on the three cops 20 in the doubling mechanism bypass the spiral part 2301 of the yarn guide rod 23, then bypass the two rollers 24, pass through the stop motion for broken ends, and then the three yarns pass through the gap between the same adjacent teeth of the comb plate 27, then bypass above the cross bar 28 and then bypass the two driving rollers 29 and the driving roller 31. After that, the three yarns pass downward through the yarn guide porcelain cup 33 of the winding mechanism, and finally the three yarns pass through the nylon hook 41 and move up and down with the lifting plate 37 and are wound around the rotating yarn bobbin 43.

[0051] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for twisting yarns, characterized in that, It includes the following steps: First, merge multiple strands of yarn into one strand through a wire merging mechanism; Then, with the cooperation of a lifting mechanism and a winding mechanism, wind the merged yarn onto a yarn tube (43), where the upper part of the yarn tube (43) is in an inverted conical shape and the lower part is in a cylindrical shape; When winding the yarn onto the yarn tube (43), control the rotation of the yarn tube (43) through a rotating mechanism (45) in the winding mechanism. At the same time, control the downward movement of the ring rail (37) through the lifting mechanism until the lower commutation switch is triggered. Then, the lifting mechanism controls the upward movement of the ring rail (37) after commutation until the upper circumferential switch is triggered. This is a small cycle. Record this cycle through the central control PLC and record the maximum displacement of the upward movement of the ring rail (37) in this cycle. In subsequent small cycles, the maximum displacement of the upward movement of the ring rail (37) gradually decreases until the ring rail (37) reaches the maximum displacement and is just located at the junction of the cylindrical part (4301) and the conical part (4302) of the yarn tube (43). The number of small cycles at this time is called a large cycle; Next, in each subsequent small cycle, the maximum displacement of the upward movement of the ring rail (37) gradually increases compared to the previous small cycle until the upper commutation switch is triggered by the ring rail (37). At this time, the number of small cycles of the subsequent movement is also a large cycle. After several large cycles, the yarn on the cylindrical part (4301) at the lower part of the yarn tube (43) is wound into a normal cylindrical shape, and the outer contour of the yarn on the top conical part (4302) is wound into a conical or cylindrical shape.

2. The method for twisting yarns according to claim 1, characterized in that: Let the height of the conical part 4302 be H millimeters and the diameter of the yarn be L millimeters. Then, the change amount of the maximum displacement of the upward movement in each small cycle relative to the previous small cycle is L millimeters, and the number of small cycles in a large cycle is H / L.

3. A method for twisting yarns according to claim 2, characterized in that: In order to make the yarn wound on the conical part (4302) regular and full, adjust the rotation speed of the yarn tube (43) so that the yarn wound on the conical part (4302) tends to be cylindrical.

4. A yarn doubling device for implementing the yarn doubling method according to any one of claims 1-3, characterized in that: It includes a wire merging mechanism, a winding mechanism, and a lifting mechanism. The wire merging mechanism is used to merge multiple strands of yarn together. The winding mechanism and the lifting mechanism cooperate to wind the merged multiple strands of yarn onto a yarn tube (43). The lower part of the yarn tube (43) is in a cylindrical shape and the upper end is in an inverted conical shape. The winding mechanism includes a vertically arranged spindle (42), a rotating mechanism for driving the spindle (42) to rotate, and a ring rail (37) arranged outside the spindle. A relief hole (3701) is provided in the middle of the ring rail (37). An annular limiting plate (40) is provided at the edge of the relief hole (3701). A nylon hook (41) that can rotate along the limiting plate (40) is provided on the limiting plate (40). The ring rail (37) is connected to the lifting mechanism. A yarn guiding porcelain cup (33) is provided directly above the spindle (42); The yarn tube (43) is fixedly provided on the spindle (42); It also includes an upper commutation switch and a lower commutation switch for controlling the commutation of the ring rail (37) at the upper and lower ends of the yarn tube (43).

5. The yarn doubling device according to claim 4, characterized in that: The ring rail plate (37) is connected to the connecting plate (46). A plurality of winding mechanisms are arranged uniformly along the horizontal direction. The connecting plates (46) of the plurality of winding mechanisms are connected to the same lifting plate (47). The lifting mechanism is used to drive the lifting plate (47) to move up and down.

6. The yarn doubling device according to claim 5, characterized in that: The lifting mechanism includes a driving sprocket (6), a steering sprocket (4), a driven sprocket (1101), a double sprocket (12) and a transmission sprocket (16). The double sprocket (12) is arranged on the first distribution shaft (11). A driven sprocket (1101) is installed at one end of the first distribution shaft (11) close to the steering sprocket (4). The transmission sprocket (16) is arranged on the second distribution shaft (15). The driving sprocket (6) is installed on the output shaft of the servo motor (7). A first chain (10) is fixed on the driving sprocket (6). The other end of the first chain (10) is fixed to the driven sprocket (1101) after passing around the steering sprocket (4). A load-bearing chain (13) is fixed on the double sprocket (12). The lower end of the load-bearing chain (13) is connected to a counterweight (14). A lifting chain (17) is fixed on the double sprocket (12). The lifting chain (17) is connected to the lifting plate (47) after passing around the transmission sprocket (16). A plurality of guide holes are arranged on the lifting plate (47), and guide rods (48) are arranged vertically in the guide holes.

7. The yarn doubling device according to claim 6, characterized in that: Two rows of parallel winding mechanisms and winding mechanisms are symmetrically arranged. The lifting mechanism is arranged between the two rows of winding mechanisms. Two double sprockets (12) and two transmission sprockets (16) are provided. The two double sprockets (12) are arranged at both ends of the first distribution shaft (11). The two transmission sprockets (16) are arranged at both ends of the second distribution shaft (15). A load-bearing chain (13) is fixed on each of the two double sprockets (12). A lifting chain (17) is fixed on each of the two double sprockets (12). The two lifting chains are respectively connected to two lifting plates (47) in the two rows of symmetrically arranged winding mechanisms.

8. A yarn doubling device according to claim 7, characterized in that: The upper reversing switch and the lower reversing switch are proximity switches arranged on the side surfaces of the upper and lower ends of the yarn bobbin (43) for detecting the position of the ring rail plate (3), or, The upper reversing switch and the lower reversing switch are proximity switches arranged on the side surface of the lifting plate (47) for detecting the position of the lifting plate (47), or, The output shaft of the servo motor (7) is coaxially fixed with an extension shaft (8). A detection block is arranged on the extension shaft (8). A limit switch (9) is arranged around the extension shaft (8) to sense the position of the detection block, thereby controlling the forward and reverse rotation directions and angles of the output shaft.

9. The yarn doubling device according to claim 4, characterized in that: The merging mechanism includes a plurality of first mounting plates (18) uniformly arranged along the vertical direction and a yarn inserting seat (19) arranged on the first mounting plate (18). The yarn inserting seat (19) is used for mounting a cheese (20). A second mounting plate (21) is arranged below the first mounting plate (18). A C-shaped or L-shaped fifth mounting bracket (22) is mounted on the second mounting plate (21). A yarn guiding rod (23) corresponding to the yarn inserting seat (19) one by one is arranged on the fifth mounting bracket (22). A spiral part (2301) is arranged at the lower end of the yarn guiding rod (23). A fourth mounting bracket (30) is arranged below the second mounting plate (21). Three stop motion devices for broken yarn are horizontally arranged on the fourth mounting bracket (30). A comb plate (27) is arranged at the front part of the stop motion device for broken yarn. Two pressing rollers (29) in contact with each other are arranged below the comb plate (27). One of the pressing rollers (29) is in contact with a driving roller (31). The rotating shaft (32) of the driving roller (31) is connected with a rotating mechanism.

10. A yarn doubling device according to claim 9, characterized in that: It further includes an upper stop switch and a lower stop switch for limiting the extreme positions of the ring rail (37) during its up and down movement.

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