Twisting method of primary twisting and secondary twisting all-in-one machine

Abstract

The invention relates to a twisting method of a primary and secondary twisting all-in-one machine, which comprises the following steps that: 1) three primary twisting spindles are respectively driven by respective primary twisting motors to respectively perform primary twisting on three strands of yarns; (2) adjusting the tension of the primarily twisted yarns through respective primary twisting tensioners, and conveying the primarily twisted yarns to an overfeeding mechanism; (3) the overfeeding mechanism sends the three strands of yarn to a yarn passing wheel, and doubling is conducted on the yarn passing wheel; (4) the doubled yarn enters a second twisting spindle; the second twisting spindle rotates to conduct second twisting on the yarn; (5) the yarn obtained after second twisting enters a second twisting spindle and is conveyed to a yarn guide device through second twisting overfeeding; (6) the yarn is guided by a yarn guide device to do left-right reciprocating motion; and (7) the friction roller abuts against a yarn bobbin installed on the bobbin creel, the yarn bobbin is rotated through the friction roller, and therefore the yarn is wound around the yarn bobbin. The twisting method of the primary and secondary twisting all-in-one machine is high in production efficiency, uniform in yarn guide tension and suitable for roving yarn production.

Description

Technical field

[0001] The invention relates to a yarn production method, in particular to a twisting method of a primary-twisting and secondary-twisting all-in-one machine, and belongs to the technical field of yarn production. [Background Technology]

[0002] In the production of conventional primary and secondary twist yarns, each strand of yarn must first be twisted individually, known as the primary twist. Multiple primary twisted yarns are then joined together. Finally, the combined yarns are twisted a second time, known as the secondary twist. This three-step process (primary twist, joining together, and secondary twisting) requires a wide variety of equipment, resulting in significant investment, extensive installation space, numerous operators, and low production efficiency. Furthermore, these multiple steps cause significant wear and tear on the yarn.

[0003] The spindle is an important component of the twisting equipment. It twists the yarn by rotating and drives the yarn bobbin to rotate to wind the twisted yarn into shape. The spindle of the prior art is shown in the invention patent No. 202020424236.9 applied for earlier by the applicant. It twists the yarn by driving the twisting spindle to rotate by a twisting motor. However, since the twisting spindle is installed vertically and only has support at the bottom, it can only be used to produce thinner yarns, not thicker yarns, and has certain limitations.

[0004] At the same time, the twisting equipment ultimately needs to wind the yarn onto a yarn bobbin, so the wire guide mechanism is an important component structure of the yarn production equipment. The wire guide mechanism of the prior art is shown in the invention patent No. 201420209017.3 applied for earlier by the applicant. It drives a wire wheel by the forward and reverse rotation of a motor, and then drives the wire rope by the wire wheel, and drives the yarn guide head back and forth through the wire wheel to achieve yarn guiding. However, when the yarn guide head of the above-mentioned wire guide mechanism moves back and forth left and right, it will produce uneven tension on the yarn. For example, when the yarn guide head is in the middle position of the yarn bobbin and at both ends of the yarn bobbin, the tension of the yarn is different, resulting in inconsistent tension when the yarn is wound onto the yarn bobbin, thereby affecting the quality of the yarn winding.

[0005] Therefore, in order to solve the above technical problems, it is necessary to provide an innovative twisting method for a primary and secondary twisting machine to overcome the above defects in the prior art. [Summary of the invention]

[0006] In order to solve the above problems, the purpose of the present invention is to provide a twisting method for a primary and secondary twisting integrated machine which has high production efficiency, uniform yarn guide tension and is suitable for the production of coarse yarn.

[0007] In order to achieve the above object, the technical scheme adopted by the present application is as follows: a twisting method of a primary and secondary twisting integrated machine, the primary and secondary twisting integrated machine comprising a machine frame, a primary twisting motor, three primary twisting spindles, a primary twisting tensioner, an overfeed mechanism, a thread guide wheel, a secondary twisting spindle, a secondary twisting overfeed, a yarn guide device, a friction roller and a bobbin holder; wherein the primary twisting motor is installed at the bottom of the machine frame; the three primary twisting spindles are arranged side by side, each primary twisting spindle is rotatable and driven by a primary twisting motor; a primary twisting tensioner is arranged above each primary twisting spindle; the overfeed mechanism is installed on one side of the upper part of the machine frame; the secondary twisting spindle is installed on the other side of the upper part of the machine frame, and the left and right ends of the secondary twisting spindle are respectively pivotally connected to the machine frame; the thread guide wheel is arranged between the overfeed mechanism and the secondary twisting spindle; the secondary twisting overfeed, the yarn guide device, the friction roller and the bobbin holder are respectively installed in the secondary twisting spindle.

[0008] The twisting method comprises the following steps:

[0009] 1) The three primary twisting spindles are respectively driven by the primary twisting motors, and three yarns are respectively twisted by the three primary twisting spindles;

[0010] 2) The twisted yarns are respectively adjusted in tension by the primary twisting tensioners and are transported to the overfeed mechanism;

[0011] 3) The overfeed mechanism sends the three yarns to the thread guide wheel, and the three yarns are combined at the thread guide wheel;

[0012] 4) The combined yarns enter the secondary twisting spindle, and the secondary twisting spindle rotates to twist the yarns;

[0013] 5) The twisted yarns enter the secondary twisting spindle, and are transported to the yarn guide device by the secondary twisting overfeed in the secondary twisting spindle;

[0014] 6) The yarns are guided by the yarn guide device to move back and forth left and right;

[0015] 7) The friction roller abuts against the yarn bobbin installed on the bobbin holder, and the yarn bobbin is rotated by the rotation of the friction roller, so that the yarn is wound on the yarn bobbin.

[0016] The twisting method of the primary and secondary twisting integrated machine of the present invention is further as follows: the secondary twisting spindle includes a left main shaft, a right main shaft, a turntable, a flying wing, a left mounting plate, a right mounting plate, a secondary twisting overfeed, a yarn guide device, a friction roller and a bobbin rack; wherein, the left main shaft and the right main shaft are respectively arranged horizontally and mounted on the frame, so that the two ends of the secondary twisting spindle are respectively supported on the frame; the turntable is connected to the left main shaft and rotates as the left main shaft rotates; the flying wing is connected to the right main shaft and rotates as the right main shaft rotates; the left mounting plate is mounted on the left main shaft through a bearing; the right mounting plate is mounted on the right main shaft through a bearing; the secondary twisting overfeed and the left main shaft are pivotally connected; a horizontal mounting seat is provided between the left mounting plate and the right mounting plate; the yarn guide device, friction roller and bobbin rack are respectively mounted on the horizontal mounting seat.

[0017] The twisting method of the primary and secondary twisting integrated machine of the present invention is further as follows: an intermediate shaft is pivotally connected between the left mounting plate and the right mounting plate; the intermediate shaft is located below the horizontal mounting seat, and a transmission pulley I is installed at both ends thereof; a transmission pulley II is installed on the left main shaft and the right main shaft respectively, and the transmission pulley I and the transmission pulley II are connected by a synchronous belt I, so that the left main shaft can transmit the right main shaft; a retaining ring is also installed on the edge of the left mounting plate; an overfeed motor is installed on the left mounting plate, and the overfeed motor is connected through a synchronous belt II and drives the secondary twisting and overfeeding.

[0018] The twisting method of the primary and secondary twisting integrated machine of the present invention is further as follows: an intermediate pulley is provided on the intermediate shaft, and the intermediate pulley drives a generator to generate electricity; the generator is electrically connected and supplies power to the secondary twisting overfeed, yarn guide device and friction roller.

[0019] The twisting method of the primary and secondary twisting integrated machine of the present invention is further as follows: the yarn guiding device includes a yarn guiding base plate, a yarn guiding wheel, a yarn guiding motor, a synchronous belt III, a yarn guiding head, a guide rail, a slider, a coil spring and a steel wire rope; wherein, the yarn guiding base plate is fixed on the left mounting plate and the right mounting plate, and is arranged horizontally; the yarn guiding wheel is pivotally connected to the yarn guiding base plate; the yarn guiding motor is installed on the yarn guiding base plate, and is connected to and drives one of the yarn guiding wheels; the synchronous belt III is sleeved on the yarn guiding wheel and driven by the yarn guiding wheel; the yarn guiding head is fixed on the synchronous belt III and is driven by the synchronous belt III to move back and forth left and right; the guide rail is installed on one side of the yarn guiding base plate; the slider and the guide rail cooperate and can move along the guide rail; one end of the steel wire rope is connected to the coil spring, and the other end is connected to the slider; the coil spring is installed on the right mounting plate; it pulls the slider through the steel wire rope.

[0020] The twisting method of the primary and secondary twisting integrated machine of the present invention is further as follows: a yarn guide seat is installed on the yarn guide base plate, and a guide groove is provided on one side of the yarn guide seat; a guide block is provided on one side of the yarn guide head, and the guide block and the guide groove cooperate; a shielding cover is provided on the top of the yarn guide seat, and the shielding cover shields the top of the synchronous belt III.

[0021] The twisting method of the primary and secondary twisting integrated machine of the present invention is further as follows: a wire wheel is provided on the slider; the yarn is wound onto the wire wheel; and the yarn and the wire rope are located on different sides of the wire wheel.

[0022] The twisting method of the primary and secondary twisting integrated machine of the present invention is further as follows: a cover is installed on one side of the yarn guide base plate, and a limit groove is provided on the cover; the slider is located in the limit groove; a wire passing nozzle is provided on the cover and the side of the right mounting plate close to the winding spring respectively; the steel wire rope passes through the wire passing nozzle and is located under the cover.

[0023] The twisting method of the primary and secondary twisting integrated machine of the present invention is further as follows: the step 5) is specifically as follows: the left main shaft of the secondary twisting spindle is linked to the right main shaft through the intermediate shaft, so that the left main shaft drives the turntable, and the right main shaft is linked to the flying wing; the yarn passes through one end of the flying wing and enters through the wire hole of the turntable, and the turntable and the flying wing rotate to form a yarn air ring to realize twisting; then the yarn is passed into the center of the left main shaft, and passes out from the shaft end of the left main shaft and enters the secondary twisting overfeed in the yarn air ring.

[0024] The twisting method of the primary and secondary twisting integrated machine of the present invention can also be: the step 6) is specifically as follows: the yarn guide head moves to the left, that is, when it is away from the coil spring, the yarn guide head drives the yarn to move to the left; the yarn drives the slider to move to the left along the guide rail, and the slider then pulls the wire rope to release the coil spring, and the elastic force of the coil spring is used to offset part of the tension on the yarn; conversely, the yarn guide head moves to the right, that is, when it is close to the coil spring, the elastic restoring force of the coil spring pulls the slider to move to the right along the guide rail.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The twisting method of the primary and secondary twisting integrated machine of the present invention can simultaneously complete the processes of primary twisting, doubling, and secondary twisting of yarns. The process has a high degree of integration, and the primary and secondary twisting integrated machine used has many advantages such as complete functions, low cost, and small footprint.

[0027] 2. The second twisting spindle used in the twisting method of the primary and second twisting integrated machine of the present invention is supported on the frame by left and right main shafts respectively, so that the second twisting spindle is installed horizontally, has a large load-bearing capacity, runs smoothly, and is suitable for the production of thicker yarns.

[0028] 3. The yarn guide device used in the twisting method of the primary and secondary twisting machine of the present invention generates tension on the slider through a winding spring, and then acts on the yarn through the slider to offset the uneven tension on the yarn when the yarn guide head moves back and forth left and right, so that the yarn tension is consistent, thereby improving the quality of the yarn.

Brief Description of the Drawings

[0029] Figure 1 It is a three-dimensional diagram of the primary and secondary twisting integrated machine of the present invention.

[0030] Figure 2 It is a perspective view of the secondary twisting spindle of the primary and secondary twisting integrated machine of the present invention.

[0031] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle.

[0032] Figure 4 yes Figure 2 A three-dimensional exploded diagram of the middle part structure.

[0033] Figure 5 yes Figure 2 Exploded perspective view of the right main shaft and wing.

[0034] Figure 6 yes Figure 2 A three-dimensional view of the yarn guide device in FIG.

[0035] Figure 7 yes Figure 2 Exploded three-dimensional diagram of the yarn guide device.

[0036] Figure 8 yes Figure 7 A partial enlarged view of point B in the middle.

[0037] Figure 9 yes Figure 2 The state diagram of the yarn guide device when the yarn guide head is on the left.

[0038] Figure 10 yes Figure 7 The state diagram when the yarn guide head is on the right.

[0039] Figure 11 yes Figure 9 A partial enlarged view of point C in the middle. [Specific implementation method]

[0040] Please refer to the instruction manual Figure 1 To the attached Figure 11 As shown, the present invention is a primary twisting and secondary twisting integrated machine, which consists of a frame 1, a primary twisting motor 21, a primary twisting spindle 22, a primary twisting tensioner 31, an overfeed mechanism 32, a wire passing wheel 33, a secondary twisting spindle 4, a secondary twisting overfeed 5, a yarn guide device 6, a friction roller 7 and a creel rack 8.

[0041] The primary twist motor 21 is mounted at the bottom of the frame 1. Three primary twist spindles 22 are arranged side by side, each of which is driven by a primary twist motor 21 to rotate. The primary twist spindles 22 rotate to perform primary twisting on the yarn 10. The primary twist spindles 22 are conventional and will not be described in detail here.

[0042] A primary twist tensioner 31 is provided above each primary twist spindle 21, and the tension of the yarn 10 after primary twisting is adjusted by the primary twist tensioner 31. The overfeed mechanism 32 is installed on one side of the upper part of the frame 1, and is used to transport the yarn 10.

[0043] The thread passing wheel 33 is arranged between the overfeed mechanism 32 and the secondary twisting spindle 4. The three yarns after primary twisting pass through the thread passing wheel 33 and are combined into one yarn at the thread passing wheel 33.

[0044] The final twisting spindle 4 is mounted on the other side of the upper portion of the frame 1, with its left and right ends pivotally connected to the frame 1. The yarn 10, after passing through the thread passing wheel 33, enters the final twisting spindle 4, where it is final-twisted. The final twisting overfeed 5, yarn guide 6, friction roller 7, and creel 8 are each mounted within the final twisting spindle 4. A partition 11 is provided between the primary twisting spindle 21 and the final twisting spindle 4 to prevent interference between the primary-twisted and final-twisted yarns 10.

[0045] Furthermore, the second twisting spindle 4 is composed of several parts, such as a left main shaft 41, a right main shaft 42, a turntable 43, a flying wing 44, a left mounting plate 45, and a right mounting plate 46.

[0046] The left and right spindles 41, 42 are arranged horizontally and coaxially and are mounted on the frame 1, so that the two ends of the second twisting spindle 4 are supported on the frame 1 and are installed horizontally. Since the two ends of the second twisting spindle are supported by the left and right spindles 41, 42, respectively, it has a large load capacity and operates smoothly, making it particularly suitable for the production of thicker yarns.

[0047] The left spindle 41 is hollow and connected to a re-twist motor (not shown) for drive. The turntable 43 is connected to the left spindle 41 and rotates with it. A yarn hole 431 is defined on the edge of the turntable 43. The yarn 10 passes through the turntable 43 through the hole 431 and into the center of the left spindle 41. The re-twist overfeed 5 is pivotally connected to the left spindle 41. After passing through the left spindle 41, the yarn 10 is wound onto the re-twist overfeed 5.

[0048] The wing 44 is connected to the right spindle 42 and rotates with the right spindle 42. Specifically, an intermediate shaft 47 is pivotally connected between the left mounting plate 45 and the right mounting plate 46. Drive pulleys I471 are mounted on each end of the intermediate shaft 47. Drive pulleys II472 are mounted on the left and right spindles 41 and 42, respectively. Drive pulleys I471 and II472 are connected by a timing belt I473, enabling the left spindle 41 to drive the right spindle 42, which in turn drives the wing 44. The yarn 10 rotates with the rotation of the turntable 43 and wing 44, thus forming a yarn balloon.

[0049] Furthermore, the intermediate shaft 47 is provided with an intermediate pulley 474, which drives a generator 49 via a belt 475, causing the generator 49 to generate electricity. The generator 49 is electrically connected to and supplies power to electrical devices such as the re-twist overfeed 5, the yarn guide device 6, and the friction roller 7. This eliminates the need to use wires to transmit external electrical energy to the yarn balloon, ensuring stable and reliable twisting performance and significantly reducing the failure rate.

[0050] The left mounting plate 45 is mounted on the left spindle 41 via a bearing; the right mounting plate 46 is mounted on the right spindle 42 via a bearing. A horizontal mounting seat 48 is provided between the left and right mounting plates 45, 46. The left and right mounting plates 45, 46, and horizontal mounting seat 48 remain stationary due to their own weight, while the left and right spindles 41, 42 are able to rotate.

[0051] A retaining ring 451 is mounted on the edge of the left mounting plate 45. The yarn 10 abuts against the retaining ring 451, preventing the yarn 10 from touching the components inside the retaining ring 451 during rotation, and ensuring that the yarn balloon expands. An overfeed motor 51 is further mounted on the left mounting plate 45. The overfeed motor 51 is connected to and drives the re-twisting overfeed 5 via a timing belt II 52, causing the re-twisting overfeed 5 to rotate and transport the yarn.

[0052] The yarn guide 6, friction roller 7, creel 8 and generator 49 are respectively mounted on a horizontal mounting base 48, and an intermediate shaft 47 is located below the horizontal mounting base 48 to prevent broken yarn from being wound onto the intermediate shaft 47. The yarn fed by the double twist overfeed 5 is guided by the yarn guide 6 and moves back and forth. A yarn bobbin 81 is mounted on the creel 8. The yarn bobbin 81 abuts against the friction roller 7. The rotation of the friction roller 7 drives the yarn bobbin 81 to rotate, thereby winding the yarn 10 onto the yarn bobbin 81. The friction roller 7 and the creel 8 are both prior art and will not be described in detail here.

[0053] The yarn guiding device 6 is assembled from several parts including a yarn guiding base plate 62, a yarn guiding wheel 631, a yarn guiding motor 632, a synchronous belt III 633, a yarn guiding head 64, a guide rail 65, a slider 66, a coil spring 67 and a steel wire rope 68.

[0054] The yarn guide bottom plate 62 is fixed on the left mounting plate 45 and the right mounting plate 46 and is horizontally arranged. The yarn guide wheels 631 are pivoted on the yarn guide bottom plate 62 and are specifically arranged in two and are located on the left and right sides of the yarn guide bottom plate 62.

[0055] The yarn guide motor 632 is installed on the yarn guide bottom plate 62 and is connected and drives one of the yarn guide wheels 631. The synchronous belt III 633 is sleeved on the two yarn guide wheels 631 and is driven by the yarn guide wheels 631, so as to realize the movement of the synchronous belt III 633.

[0056] The yarn guide head 64 is fixed on the synchronous belt III 633 and is driven by the synchronous belt III 633 to move reciprocatingly left and right, and the yarn guide head 64 drives the yarn 10 to move left and right, so that the yarn is distributed on the yarn bobbin along the radial direction of the yarn bobbin 81. Specifically, the yarn guide motor 632 rotates forward or reversely and drives the yarn guide wheel 631, the yarn guide wheel 631 drives the synchronous belt III 633, and the synchronous belt III 633 drives the yarn guide head 64 on it to move reciprocatingly left and right, so as to guide the yarn 10.

[0057] The yarn guide bottom plate 62 is provided with a yarn guide seat 621, and one side of the yarn guide seat 621 is provided with a guide groove 622. One side of the yarn guide head 64 is provided with a guide block 641, and the guide block 641 and the guide groove 622 are matched, so as to limit the position of the yarn guide head 64, so that the yarn guide head 64 can only reciprocate along the extension direction of the guide groove 622, avoiding the deflection of the yarn guide head 64. The top of the yarn guide seat 621 is provided with a shielding cover 623, and the shielding cover 623 is shielded above the synchronous belt III 633, which can protect the synchronous belt III 633 and avoid the accumulation of lint on the synchronous belt III 633.

[0058] The guide rail 65 is installed on one side of the yarn guide bottom plate 62. The sliding block 66 is matched with the guide rail 65. One end of the steel wire rope 68 is connected with the coiled spring 67, and the other end is connected with the sliding block 66. The sliding block 66 is provided with the yarn guide wheel 61, and the yarn 10 is wound on the yarn guide wheel 61. The yarn 10 and the steel wire rope 68 are located on different sides of the yarn guide wheel 61, so that the steel wire rope 68 or the yarn 10 can pull the sliding block 66 respectively, so that the sliding block 66 can move along the guide rail 65.

[0059] The coiled spring 67 is installed on the right mounting plate 46 and pulls the sliding block 66 by winding the steel wire rope 68.

[0060] Furthermore, a cover 69 is mounted on one side of the yarn guide base plate 62. The cover 69 is provided with a limiting slot 691. The slider 66 is positioned within the limiting slot 691 to limit the range of movement of the slider 66. A wire feed nozzle 692 is provided on the cover 69 and on the side of the right mounting plate 46 near the coil spring 67. The wire rope 68 passes through the wire feed nozzle 692 to achieve deflection and is located below the cover 69 to protect the moving wire rope 68.

[0061] The method for twisting the yarn using the above-mentioned primary and secondary twisting machine is as follows:

[0062] 1), the three primary twisting spindles 22 are driven by respective primary twisting motors 21, thereby performing primary twisting on the three yarns 10.

[0063] 2) The yarns 10 after primary twisting are tensioned by respective primary twist tensioners 31 and are transported to the overfeed mechanism 32 .

[0064] 3) The overfeed mechanism 32 delivers the three strands of yarn to the thread passing wheel 33, and the yarns are paralleled at the thread passing wheel 33.

[0065] 4) The yarn after doubling enters the re-twisting spindle 4; the re-twisting spindle 4 rotates to form a yarn balloon and re-twists the yarn.

[0066] Specifically, the re-twisting motor of the re-twisting spindle 4 drives the left spindle 41, which in turn drives the right spindle 42 via an intermediate shaft 47. This drives the turntable 43, which in turn drives the wing 44. The yarn 10 passes through one end of the wing 44 and into the yarn hole 431 of the turntable 43. The rotation of the turntable 43 and the wing 44 forms a yarn balloon, which is then twisted. The yarn 10 then passes through the center of the left spindle 41 and exits from the end of the left spindle 41, entering the re-twisting overfeed 5 within the yarn balloon.

[0067] 5), the yarn 10 after the re-twisting enters the re-twisting spindle 4, and is transported to the yarn guide device 6 by the re-twisting overfeed 5 in the re-twisting spindle 4.

[0068] 6), the yarn 10 is guided by the yarn guide device 6 and moves back and forth.

[0069] Specifically, as attached Figure 9 As shown in the figure, when the yarn guide head 64 moves to the left, that is, away from the coil spring 67, the yarn guide head 64 drives the yarn 10 to move to the left. If the slider 66 is fixed, the tension of the yarn 10 reaches the maximum when the yarn guide head 64 reaches the leftmost side. However, in this invention, the yarn 10 drives the slider 66 to move to the left along the guide rail 65. The slider 66 pulls the wire rope 68 to release the coil spring 67. The elastic force of the coil spring 67 offsets part of the tension on the yarn 10, thereby reducing the tension on the yarn. As shown in the attached figure Figure 10As shown, on the contrary, when the yarn guide head 64 moves to the right, that is, when it approaches the coil spring 67, the elastic restoring force of the coil spring 67 pulls the slider 66, causing the slider 66 to move to the right along the guide rail 65.

[0070] 7), the friction roller 7 abuts against the yarn bobbin 81 installed on the creel 8, and the friction roller 7 rotates the yarn bobbin 81, thereby winding the yarn 10 onto the yarn bobbin 81.

[0071] The above specific implementation methods are only preferred embodiments of this creation and are not intended to limit this creation. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this creation should be included in the scope of protection of this creation.

Claims

1. A twisting method for a primary and secondary twisting machine, characterized in that: The primary twisting and re-twisting integrated machine includes a frame, a primary twisting motor, a primary twisting spindle, a primary twisting tensioner, an overfeeding mechanism, a wire passing wheel, a re-twisting spindle, a re-twisting overfeeding, a yarn guide device, a friction roller and a creel stand; wherein, the primary twisting motor is installed at the bottom of the frame; three primary twisting spindles are arranged side by side, and each primary twisting spindle is driven by a primary twisting motor to rotate; a primary twisting tensioner is provided above each primary twisting spindle; the overfeeding mechanism is installed on one side of the upper part of the frame; the re-twisting spindle is installed on the other side of the upper part of the frame, and its left and right ends are respectively pivoted to the frame; the wire passing wheel is arranged between the overfeeding mechanism and the re-twisting spindle; the re-twisting overfeeding, yarn guide device, friction roller and creel stand are respectively installed in the re-twisting spindle; The twisting method comprises the following steps: 1) The three primary twist spindles are driven by their own primary twist motors to perform primary twist on the three strands of yarn respectively; 2) The yarns after primary twisting are tensioned by respective primary twist tensioners and then transported to the overfeed mechanism; 3) The overfeed mechanism delivers the three strands of yarn to the spooling wheel, where they are then doubled. 4) The yarn after doubling enters the re-twisting spindle; the re-twisting spindle rotates to re-twist the yarn; 5) The yarn after re-twisting enters the re-twisting spindle and is transported to the yarn guide device by the re-twisting overfeed in the re-twisting spindle; 6) The yarn is guided by the yarn guide device and moves back and forth; 7) The friction roller abuts against the yarn bobbin mounted on the creel, and the yarn bobbin rotates by the friction roller, thereby winding the yarn onto the yarn bobbin.

2. The twisting method of the primary and secondary twisting machine according to claim 1, characterized in that: The double-twisting spindle includes a left main shaft, a right main shaft, a turntable, a flying wing, a left mounting plate, a right mounting plate, a double-twisting overfeed, a yarn guide device, a friction roller and a creel stand; wherein, the left main shaft and the right main shaft are respectively arranged horizontally and mounted on the frame, so that the two ends of the double-twisting spindle are respectively supported on the frame; the turntable is connected to the left main shaft and rotates as the left main shaft rotates; the flying wing is connected to the right main shaft and rotates as the right main shaft rotates; the left mounting plate is mounted on the left main shaft through a bearing; the right mounting plate is mounted on the right main shaft through a bearing; the double-twisting overfeed and the left main shaft are pivotally connected; a horizontal mounting seat is provided between the left mounting plate and the right mounting plate; the yarn guide device, friction roller and creel stand are respectively mounted on the horizontal mounting seat.

3. The twisting method of the primary and secondary twisting machine according to claim 2, characterized in that: An intermediate shaft is pivotally connected between the left mounting plate and the right mounting plate; the intermediate shaft is located below the horizontal mounting seat, and a transmission pulley I is installed at both ends thereof; a transmission pulley II is installed on the left main shaft and the right main shaft respectively, and the transmission pulley I and the transmission pulley II are connected by a synchronous belt I, so that the left main shaft can transmit the right main shaft; a retaining ring is also installed on the edge of the left mounting plate; an overfeed motor is installed on the left mounting plate, and the overfeed motor is connected through a synchronous belt II and drives the re-twisting overfeed.

4. The twisting method of the primary and secondary twisting machine according to claim 3, characterized in that: An intermediate pulley is provided on the intermediate shaft, and the intermediate pulley drives a generator to generate electricity; the generator is electrically connected and supplies power to the re-twisting overfeed, the yarn guide device and the friction roller.

5. The twisting method of the primary and secondary twisting machine according to claim 2, characterized in that: The yarn guiding device includes a yarn guiding base plate, a yarn guiding wheel, a yarn guiding motor, a synchronous belt III, a yarn guiding head, a guide rail, a slider, a coil spring and a steel wire rope; wherein, the yarn guiding base plate is fixed on the left mounting plate and the right mounting plate, and is arranged horizontally; the yarn guiding wheel is pivotally connected to the yarn guiding base plate; the yarn guiding motor is mounted on the yarn guiding base plate, and is connected to and drives one of the yarn guiding wheels; the synchronous belt III is sleeved on the yarn guiding wheel and driven by the yarn guiding wheel; the yarn guiding head is fixed on the synchronous belt III and is driven by the synchronous belt III to move back and forth left and right; the guide rail is mounted on one side of the yarn guiding base plate; the slider and the guide rail cooperate and can move along the guide rail; one end of the steel wire rope is connected to the coil spring, and the other end is connected to the slider; the coil spring is mounted on the right mounting plate; it pulls the slider through the steel wire rope.

6. The twisting method of the primary and secondary twisting machine according to claim 5, characterized in that: A yarn guide seat is installed on the yarn guide base plate, and a guide groove is provided on one side of the yarn guide seat; a guide block is provided on one side of the yarn guide head, and the guide block and the guide groove cooperate; a shielding cover is provided on the top of the yarn guide seat, and the shielding cover shields the top of the synchronous belt III.

7. The twisting method of the primary and secondary twisting machine according to claim 5, characterized in that: The slider is provided with a wire wheel; the yarn is wound onto the wire wheel; and the yarn and the wire rope are located on different sides of the wire wheel.

8. The twisting method of the primary and secondary twisting machine according to claim 5, characterized in that: A cover is installed on one side of the yarn guide base plate, and a limit groove is provided on the cover; the slider is located in the limit groove; a wire passing nozzle is provided on the cover and the side of the right mounting plate close to the coil spring; the wire rope passes through the wire passing nozzle and is located under the cover.

9. The twisting method of the primary and secondary twisting machine according to claim 1, characterized in that: The step 5) specifically comprises: the left main shaft of the re-twisting spindle is linked to the right main shaft via the intermediate shaft, so that the left main shaft drives the turntable, and the right main shaft is linked to the flying wing; the yarn passes through one end of the flying wing and enters the yarn hole of the turntable, and the turntable and the flying wing rotate to form a yarn balloon to achieve twisting; The yarn then passes into the center of the left main shaft, passes through the shaft end of the left main shaft and enters the re-twisting overfeed in the yarn balloon.

10. The twisting method of the primary and secondary twisting machine according to claim 1, characterized in that: The step 6) is specifically as follows: when the yarn guide head moves to the left, that is, away from the coil spring, the yarn guide head drives the yarn to move to the left; the yarn drives the slider to move to the left along the guide rail, and the slider then pulls the wire rope to release the coil spring, and the elastic force of the coil spring offsets part of the tension on the yarn; conversely, when the yarn guide head moves to the right, that is, close to the coil spring, the elastic restoring force of the coil spring pulls the slider, causing the slider to move to the right along the guide rail.

Images