A twisting method of a primary and secondary twisting integrated machine

Abstract

The application relates to a twisting method of an integrated primary and secondary twisting machine, which comprises the following steps: 1), three primary twisting spindles are respectively driven by primary twisting motors, and three yarns are respectively subjected to primary twisting; 2), the primary twisted yarns are subjected to tension adjustment by respective primary twisting tensioners, and are transported to an overfeed mechanism; 3), the overfeed mechanism sends the three yarns to a thread guide wheel, and the yarns are subjected to doubling at the thread guide wheel; 4), the doubled yarns enter secondary twisting spindles, the secondary twisting spindles rotate, and the yarns are subjected to secondary twisting; 5), the secondary twisted yarns enter the secondary twisting spindles, and are transported to a yarn guide device by a secondary twisting overfeed; 6), the yarns are guided by the yarn guide device, and are subjected to left-right reciprocating movement; and 7), a friction roller abuts on a yarn bobbin mounted on a bobbin holder, the yarn bobbin is rotated by rotation of the friction roller, and the yarn is wound on the yarn bobbin. The twisting method of the integrated primary and secondary twisting machine has high production efficiency, uniform yarn guide tension, and is suitable for production of coarse yarns.

Description

Technical Field

[0001] This invention relates to a yarn production method, specifically to a twisting method for a primary and secondary twisting integrated machine, belonging to the field of yarn production technology. Background Technology

[0002] In the production of existing single-twisted and multi-twisted yarns, the first step is to twist each yarn individually (initial twist); then, the multiple initially twisted yarns are combined; finally, the combined multi-twisted yarns are twisted a second time (multi-twisted). It can be seen that the above processing steps are completed in three stages (initial twist, combining, and multi-twisting), requiring a variety of equipment, large equipment investment, large installation space, many operators, and low production efficiency. Furthermore, the multiple processing steps also cause greater wear and tear on the yarn.

[0003] The spindle is an important component of twisting equipment. It twists the yarn by rotating and drives the yarn bobbin to rotate, thus winding the twisted yarn into shape. Existing spindles, such as those described in the applicant's earlier invention patent application No. 202020424236.9, twist the yarn by rotating the spindle driven by a twisting motor. However, because this twisting spindle is vertically mounted and only has support at the bottom, it is only suitable for producing finer yarns and not for producing coarser yarns, thus having certain limitations.

[0004] Meanwhile, since twisting equipment ultimately needs to wind the yarn onto a yarn bobbin, the yarn guiding mechanism is a crucial component of yarn production equipment. Existing yarn guiding mechanisms, as shown in the applicant's earlier invention patent application No. 201420209017.3, use a motor to drive a steel wire wheel in both directions. The steel wire wheel then drives a steel wire rope, which in turn drives the yarn guide head to reciprocate, thus guiding the yarn. However, when the yarn guide head moves back and forth in the aforementioned mechanism, it generates uneven tension on the yarn. For example, the yarn tension differs when the yarn guide head is in the middle of the yarn bobbin versus at either end, resulting in inconsistent tension as the yarn winds onto the bobbin, thus affecting the quality of the yarn winding.

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

[0006] To address the aforementioned problems, the present invention aims to provide a twisting method for a primary and secondary twisting machine that offers high production efficiency, uniform yarn tension, and is suitable for roving production.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a twisting method for a primary and secondary twisting integrated machine, the primary and secondary twisting integrated machine comprising a frame, a primary twisting motor, a primary twisting spindle, a primary twisting tensioner, an overfeed mechanism, a yarn guide roller, a secondary twisting spindle, a secondary twisting overfeed, a yarn guide device, a friction roller, and a bobbin frame; wherein, the primary twisting motor is installed at the bottom of the frame; three primary twisting spindles are arranged side by side, each primary twisting spindle being driven to rotate by a primary twisting motor; a primary twisting tensioner is provided above each primary twisting spindle; the overfeed mechanism is installed on one side of the upper part of the frame; the secondary twisting spindle is installed on the other side of the upper part of the frame, and its left and right ends are respectively pivotally connected to the frame; the yarn guide roller is disposed between the overfeed mechanism and the secondary twisting spindle; the secondary twisting overfeed, the yarn guide device, the friction roller, and the bobbin frame are respectively installed inside the secondary twisting spindle; The twisting method includes the following steps: 1) Each of the three initial twisting spindles is driven by its own initial twisting motor, which performs initial twisting on the three strands of yarn respectively; 2) After initial twisting, the yarns are tensioned by their respective initial twisting tensioners and then fed to the overfeed mechanism; 3) The overfeed mechanism feeds the three strands of yarn to the guide roller and performs yarn twisting at the guide roller; 4) The yarn after being doubling enters the retwisting spindle; the retwisting spindle rotates to retwist the yarn; 5) The retwisted yarn enters the retwisting spindle and is conveyed to the yarn guiding device by the retwisting overfeed inside the retwisting spindle; 6) The yarn is guided by the yarn guiding device and moves back and forth left and right; 7) The friction roller comes into contact with the yarn bobbin mounted on the bobbin frame. The yarn bobbin rotates as the friction roller rotates, thereby winding the yarn onto the yarn bobbin.

[0008] The twisting method of the integrated primary and secondary twisting machine of the present invention further comprises: the secondary twisting spindle includes a left main shaft, a right main shaft, a turntable, a wing, a left mounting plate, a right mounting plate, a secondary twisting overfeed, a yarn guiding device, a friction roller, and a bobbin frame; wherein, the left and right main shafts are respectively horizontally arranged and mounted on the machine frame, so that the two ends of the secondary twisting spindle are respectively supported on the machine frame; the turntable is connected to the left main shaft and rotates with the left main shaft; the wing is connected to the right main shaft and rotates with the right main shaft; 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 is pivotally connected to the left main shaft; a horizontal mounting seat is provided between the left and right mounting plates; the yarn guiding device, the friction roller, and the bobbin frame are respectively mounted on the horizontal mounting seat.

[0009] 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 base, and transmission pulleys I are respectively installed at both ends of the shaft; transmission pulleys II are respectively installed on the left main shaft and the right main shaft, and transmission pulleys I and II are connected by a synchronous belt I, so that the left main shaft can drive 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 and drives the secondary twisting overfeed through the synchronous belt II.

[0010] The twisting method of the original twisting machine of the present invention is further as follows: an intermediate pulley is provided on the intermediate shaft, the intermediate pulley drives a generator to generate electricity; the generator is electrically connected to and supplies power to the twisting overfeed, yarn guiding device and friction roller.

[0011] The twisting method of the integrated primary and secondary twisting machine of the present invention is further described 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 horizontally arranged; 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 is 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; the guide rail is mounted on one side of the yarn guiding base plate; the slider cooperates with the guide rail 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.

[0012] The twisting method of the original twisting and retwisting 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 covers the area above the synchronous belt III.

[0013] The twisting method of the original twisting and retwisting machine of the present invention is further described as follows: a threading wheel is provided on the slider; the yarn is wound onto the threading wheel; and the yarn and the wire rope are located on different sides of the threading wheel.

[0014] The twisting method of the original twisting and retwisting machine of the present invention is further as follows: a cover is installed on one side of the yarn guide base plate, and a limiting groove is provided on the cover; the slider is located in the limiting groove; the cover and the right mounting plate are respectively provided with thread guide nozzles on the side near the coil spring; the steel wire rope passes through the thread guide nozzles and is located below the cover.

[0015] The twisting method of the original twisting and retwisting machine of the present invention is further as follows: Step 5) specifically involves: the left main shaft of the retwisting 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 yarn passage hole of the turntable, and forms a yarn air ring to achieve twisting by rotating the turntable and the flying wing; 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 retwisting overfeed in the yarn air ring.

[0016] The twisting method of the initial twisting and retwisting machine of the present invention can also be as follows: Step 6) specifically involves: 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 is used to offset 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.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The twisting method of the integrated primary and secondary twisting machine of the present invention can simultaneously complete the processes of yarn primary twisting, doubling, and secondary twisting. The process integration is high, and the integrated primary and secondary twisting machine has many advantages such as complete functions, low cost, and small footprint.

[0018] 2. In the twisting method of the integrated primary and secondary twisting machine of the present invention, the secondary twisting spindle is supported on the frame by the left and right main shafts respectively, so that the secondary twisting spindle is installed horizontally, which has a large load-bearing capacity, stable operation, and is suitable for the production of coarser yarns.

[0019] 3. In the twisting method of the integrated primary and secondary twisting machine of the present invention, the yarn guiding device generates tension on the slider through a coil spring, and then the slider acts on the yarn to counteract the uneven tension on the yarn when the yarn guiding head moves back and forth, so as to make the yarn tension uniform and improve the quality of the yarn. Attached Figure Description

[0020] Figure 1 This is a perspective view of the integrated primary and secondary twisting machine of the present invention.

[0021] Figure 2 This is a perspective view of the re-twisting spindle of the primary and secondary re-twisting integrated machine of the present invention.

[0022] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0023] Figure 4 yes Figure 2 A three-dimensional exploded view of the middle part of the structure.

[0024] Figure 5 yes Figure 2An exploded three-dimensional view of the right main shaft and flying wing.

[0025] Figure 6 yes Figure 2 A three-dimensional view of the yarn guiding device.

[0026] Figure 7 yes Figure 2 An exploded three-dimensional view of the yarn guiding device.

[0027] Figure 8 yes Figure 7 A magnified view of a section at point B in the middle.

[0028] Figure 9 yes Figure 2 The diagram shows the state of the yarn guiding device when the yarn guide head is located on the left side.

[0029] Figure 10 yes Figure 7 The diagram shows the state when the yarn guide head is located on the right side.

[0030] Figure 11 yes Figure 9 A magnified view of a section at point C. Detailed Implementation

[0031] Please refer to the instruction manual appendix. Figure 1 To be continued Figure 11 As shown, the present invention is a primary and secondary twisting integrated machine, which consists of several parts such as frame 1, primary twisting motor 21, primary twisting spindle 22, primary twisting tensioner 31, overfeed mechanism 32, yarn guide wheel 33, secondary twisting spindle 4, secondary twisting overfeed 5, yarn guide device 6, friction roller 7, and bobbin frame 8.

[0032] The initial twisting motor 21 is mounted at the bottom of the frame 1. Three initial twisting spindles 22 are arranged side-by-side, each driven by an initial twisting motor 21 to rotate. The rotation of the initial twisting spindles 22 performs initial twisting on the yarn 10. The initial twisting spindles 22 are existing technology and will not be described in detail here.

[0033] Each initial twisting spindle 21 is equipped with an initial twisting tensioner 31 above it. The tension of the yarn 10 after initial twisting is adjusted by the initial twisting tensioner 31. The overfeed mechanism 32 is installed on one side of the upper part of the frame 1 and is used to feed the yarn 10.

[0034] The yarn guide wheel 33 is located between the overfeed mechanism 32 and the retwisting spindle 4. Three initially twisted yarns pass through the yarn guide wheel 33 and are combined into one yarn at the yarn guide wheel 33.

[0035] The retwisting spindle 4 is installed on the other side of the upper part of the frame 1, and its left and right ends are respectively pivotally connected to the frame 1. The yarn 10 passing through the yarn guide wheel 33 enters the retwisting spindle 4, and is retwisted by the retwisting spindle 4. The retwisting overfeed 5, the yarn guide device 6, the friction roller 7, and the bobbin frame 8 are respectively installed inside the retwisting spindle 4. A partition 11 is provided between the initial twisting spindle 21 and the retwisting spindle 4 to prevent the initial twisted yarn 10 and the retwisted yarn 10 from interfering with each other.

[0036] Furthermore, the retwisted spindle 4 is composed of several parts, including 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.

[0037] The left main shaft 41 and the right main shaft 42 are horizontally and coaxially arranged and mounted on the frame 1, so that the two ends of the retwisting spindle 4 are supported on the frame 1 and installed horizontally. Since the two ends of the retwisting spindle are supported by the left main shaft 41 and the right main shaft 42 respectively, it has a large load-bearing capacity and runs smoothly, making it particularly suitable for the production of coarser yarns.

[0038] The left main shaft 41 is hollow and connected to and driven by a retwisting motor (not shown). The turntable 43 is connected to the left main shaft 41 and rotates with the left main shaft 41. The edge of the turntable 43 has a yarn guide hole 431. The yarn 10 passes through the yarn guide hole 431 into the turntable 43 and then into the center of the left main shaft 41. The retwisting overfeed 5 is pivotally connected to the left main shaft 41, and the yarn 10 is wound onto the retwisting overfeed 5 after passing through the left main shaft 41.

[0039] The flying wing 44 is connected to the right main shaft 42 and rotates with the right main shaft 42. Specifically, an intermediate shaft 47 is pivotally connected between the left mounting plate 45 and the right mounting plate 46. Drive pulleys I 471 are mounted at both ends of the intermediate shaft 47. Drive pulleys II 472 are mounted on the left main shaft 41 and the right main shaft 42, respectively. Drive pulleys I 471 and II 472 are connected by a synchronous belt I 473, enabling the left main shaft 41 to drive the right main shaft 42. The right main shaft 42 then drives the flying wing 44, causing the yarn 10 to rotate with the turntable 43 and the flying wing 44, thus forming a yarn air loop.

[0040] Furthermore, an intermediate pulley 474 is provided on the intermediate shaft 47, and the intermediate pulley 474 drives a generator 49 through a belt 475 to generate electricity. The generator 49 is electrically connected to and supplies power to electrical components such as the retwisting overfeed 5, the yarn guiding device 6, and the friction roller 7, thereby eliminating the need to use wires to transmit external electrical energy to the yarn loop, making the twisting performance stable and reliable, and greatly reducing the failure rate.

[0041] The left mounting plate 45 is mounted on the left spindle 41 via bearings; the right mounting plate 46 is mounted on the right spindle 42 via bearings. A horizontal mounting seat 48 is provided between the left mounting plate 45 and the right mounting plate 46. The left mounting plate 45, the right mounting plate 46, and the horizontal mounting seat 48 remain stationary due to their own weight, while the left spindle 41 and the right spindle 42 can rotate.

[0042] A retaining ring 451 is installed around 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 when it rotates, and ensuring that the yarn air loop expands. An overfeed motor 51 is further installed on the left mounting plate 45. The overfeed motor 51 is connected to and drives the retwisting overfeed 5 via a synchronous belt II 52, causing the retwisting overfeed 5 to rotate and feed the yarn.

[0043] The yarn guiding device 6, friction roller 7, bobbin holder 8, and generator 49 are respectively mounted on a horizontal mounting base 48, while the intermediate shaft 47 is located below the horizontal mounting base 48 to prevent broken yarn from winding onto the intermediate shaft 47. The yarn fed in by the retwisting overfeed 5 moves back and forth left and right under the guidance of the yarn guiding device 6. A yarn bobbin 81 is mounted on the bobbin holder 8, and 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 bobbin holder 8 are existing technologies, so they will not be described in detail here.

[0044] 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.

[0045] The yarn guide base plate 62 is fixed to the left mounting plate 45 and the right mounting plate 46, and is horizontally arranged. The yarn guide wheels 631 are pivotally connected to the yarn guide base plate 62, and there are two of them, located on the left and right sides of the yarn guide base plate 62.

[0046] The yarn guiding motor 632 is mounted on the yarn guiding base plate 62, and is connected to and drives one of the yarn guiding wheels 631. The synchronous belt III 633 is sleeved on the two yarn guiding wheels 631 and is driven by the yarn guiding wheels 631, thereby realizing the movement of the synchronous belt III 633.

[0047] The yarn guide head 64 is fixed to the synchronous belt III 633 and is driven by the synchronous belt III 633 to move back and forth. The yarn guide head 64 drives the yarn 10 to move left and right, so that the yarn is distributed radially on the yarn bobbin 81. Specifically, the yarn guide motor 632 rotates in the forward or reverse direction and drives the yarn guide wheel 631. The yarn guide wheel 631 drives the synchronous belt III 633, which in turn drives the yarn guide head 64, causing the yarn guide head 64 to move back and forth, thereby guiding the yarn 10.

[0048] A yarn guide seat 621 is installed on the yarn guide base plate 62, and a guide groove 622 is provided on one side of the yarn guide seat 621. A guide block 641 is provided on one side of the yarn guide head 64. The guide block 641 cooperates with the guide groove 622 to limit the yarn guide head 64, so that the yarn guide head 64 can only move back and forth along the extension direction of the guide groove 622, and prevent the yarn guide head 64 from deflecting. A shielding cover 623 is provided on the top of the yarn guide seat 621. The shielding cover 623 shields the synchronous belt III 633, protects the synchronous belt III 633, and prevents lint from accumulating on the synchronous belt III 633.

[0049] The guide rail 65 is installed on one side of the yarn guide base plate 62. The slider 66 cooperates with the guide rail 65. One end of the steel wire rope 68 is connected to the coil spring 67, and the other end is connected to the slider 66. The slider 66 is provided with a guide wheel 661; the yarn 10 is wound onto the guide wheel 661. The yarn 10 and the steel wire rope 68 are located on different sides of the guide wheel 661, so that the steel wire rope 68 or the yarn 10 can pull the slider 66 respectively, allowing the slider 66 to move along the guide rail 65.

[0050] The coil spring 67 is mounted on the right mounting plate 46, and it pulls the slider 66 by winding the steel wire rope 68.

[0051] Furthermore, a cover 69 is installed on one side of the yarn guide plate 62, and a limiting groove 691 is provided on the cover 69; the slider 66 is located in the limiting groove 691 to limit the movement range of the slider 66. The cover 69 and the right mounting plate 46 are respectively provided with thread guide nozzles 692 on the side near the coil spring 67; the wire rope 68 passes through the thread guide nozzles 692 to achieve deflection, and is located below the cover 69 to protect the moving wire rope 68.

[0052] The method for twisting yarn using the aforementioned integrated twisting and retwisting machine is as follows: 1) The three initial twisting spindles 22 are each driven by their respective initial twisting motors 21, thereby performing initial twisting on the three strands of yarn 10.

[0053] 2) The initial twisted yarn 10 is tensioned by its respective initial twist tensioner 31 and then fed to the overfeed mechanism 32.

[0054] 3) The overfeed mechanism 32 feeds the three yarns to the guide roller 33 and performs yarn mixing at the guide roller 33.

[0055] 4) The yarn after being doubling enters the retwisting spindle 4; the retwisting spindle 4 rotates to form a yarn air ring and retwist the yarn.

[0056] Specifically, the retwisting motor of the retwisting spindle 4 drives the left main shaft 41, which in turn links the right main shaft 42 via the intermediate shaft 47. This causes the left main shaft 41 to drive the turntable 43, while the right main shaft 42 links the wing 44. The yarn 10 passes through one end of the wing 44 and enters through the yarn passage hole 431 of the turntable 43. The yarn is twisted by the rotation of the turntable 43 and the wing 44, which together form a yarn air ring. The yarn 10 is then fed into the center of the left main shaft 41 and exits from the shaft end of the left main shaft 41, entering the retwisting overfeed 5 within the yarn air ring.

[0057] 5) The retwisted yarn 10 enters the retwisting spindle 4 and is conveyed to the yarn guiding device 6 by the retwisting overfeed 5 in the retwisting spindle 4.

[0058] 6) The yarn 10 is guided by the yarn guiding device 6 and moves back and forth.

[0059] Specifically, as shown in the attached document. Figure 9 As shown, 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 its maximum when the yarn guide head 64 reaches the far left. This design uses the yarn 10 to drive 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, and the elasticity of the coil spring 67 counteracts part of the tension on the yarn 10, thus reducing the tension on the yarn. (See attached diagram) Figure 10 As shown, conversely, 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.

[0060] 7) The friction roller 7 abuts against the yarn bobbin 81 mounted on the bobbin frame 8. By rotating the friction roller 7, the yarn bobbin 81 rotates, thereby winding the yarn 10 onto the yarn bobbin 81.

[0061] The above-described specific embodiments are merely preferred embodiments of this invention and are not intended to limit this invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the protection scope of this invention.

Claims

1. A twisting method for a primary and secondary twisting integrated machine, characterized in that: The integrated primary and secondary twisting machine includes a frame, a primary twisting motor, primary twisting spindles, a primary twisting tensioner, an overfeed mechanism, a yarn guide roller, a secondary twisting spindle, a secondary twisting overfeed, a yarn guide device, a friction roller, and a bobbin frame. The primary twisting motor is mounted at the bottom of the frame. Three primary twisting spindles are arranged side-by-side, each driven by a primary twisting motor. A primary twisting tensioner is located above each primary twisting spindle. The overfeed mechanism is mounted on one side of the upper part of the frame. The secondary twisting spindles are mounted on the other side of the upper part of the frame, with their left and right ends pivotally connected to the frame. The yarn guide roller is positioned between the overfeed mechanism and the secondary twisting spindles. The secondary twisting overfeed, yarn guide device, friction roller, and bobbin frame are respectively installed inside the secondary twisting spindles. The retwisting spindle includes a left main shaft, a right main shaft, a turntable, a wing, a left mounting plate, a right mounting plate, a retwisting overfeed, a yarn guiding device, a friction roller, and a bobbin frame. The left and right main shafts are horizontally positioned and mounted on a frame, supporting the two ends of the retwisting spindle on the frame. The turntable is connected to the left main shaft and rotates with it. The wing is connected to the right main shaft and rotates with it. The left mounting plate is mounted on the left main shaft via bearings. The right mounting plate is mounted on the right main shaft via bearings. The retwisting overfeed is pivotally connected to the left main shaft. A horizontal mounting base is provided between the left and right mounting plates. The yarn guiding device, friction roller, and bobbin frame are each mounted on the horizontal mounting base. An intermediate shaft is pivotally connected between the left and right mounting plates; the intermediate shaft is located below the horizontal mounting base, and transmission pulleys I are respectively mounted at both ends of the shaft; transmission pulleys II are respectively mounted on the left and right main shafts, and transmission pulleys I and II are connected by a synchronous belt I, enabling the left main shaft to drive the right main shaft; a retaining ring is also installed on the edge of the left mounting plate; an overfeed motor is mounted on the left mounting plate, and the overfeed motor is connected and driven by the synchronous belt II for re-twisting overfeed; 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. The yarn guiding base plate is fixed to a left mounting plate and a right mounting plate, and is horizontally positioned. 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 connects to and drives one of the yarn guiding wheels. The synchronous belt III is sleeved on the yarn guiding wheel and is driven by it. The yarn guiding head is fixed to the synchronous belt III and is driven by it to move back and forth. The guide rail is mounted on one side of the yarn guiding base plate. The slider cooperates with the guide rail and can move along it. 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, and pulls the slider via the steel wire rope. The twisting method includes the following steps: 1) Each of the three initial twisting spindles is driven by its own initial twisting motor, which performs initial twisting on the three strands of yarn respectively; 2) After initial twisting, the yarns are tensioned by their respective initial twisting tensioners and then fed to the overfeed mechanism; 3) The overfeed mechanism feeds the three strands of yarn to the guide roller and performs yarn twisting at the guide roller; 4) The yarn after being doubling enters the retwisting spindle; the retwisting spindle rotates to retwist the yarn; 5) The yarn enters the retwisting spindle and is conveyed to the yarn guiding device by the retwisting overfeed inside the retwisting spindle; 6) The yarn is guided by the yarn guiding device and moves back and forth from left to right; 7) The friction roller comes into contact with the yarn bobbin mounted on the bobbin frame. The friction roller drives the yarn bobbin to rotate, thereby winding the yarn onto the yarn bobbin.

2. The twisting method of the primary and secondary twisting integrated machine as described in claim 1, 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 to and supplies power to the retwisting overfeed, yarn guiding device and friction roller.

3. The twisting method of the primary and secondary twisting integrated machine as described in claim 1, 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 shield is provided on the top of the yarn guide seat, and the shield covers the area above the synchronous belt III.

4. The twisting method of the primary and secondary twisting integrated machine as described in claim 1, characterized in that: The slider is equipped with a guide wheel; the yarn is wound onto the guide wheel; and the yarn and the steel wire rope are located on different sides of the guide wheel.

5. The twisting method of the primary and secondary twisting integrated machine as described in claim 1, characterized in that: A cover is installed on one side of the yarn guide plate, and a limiting groove is provided on the cover; the slider is located in the limiting groove; the cover and the right mounting plate are respectively provided with thread guide nozzles on the side near the coil spring; the steel wire rope passes through the thread guide nozzles and is located below the cover.

6. The twisting method of the primary and secondary twisting integrated machine as described in claim 1, characterized in that: Step 5) specifically involves: the left main shaft of the retwisting spindle is linked to the right main shaft through the intermediate shaft, causing the left main shaft to drive the turntable, and the right main shaft to link the flying wing; the yarn passes through one end of the flying wing and enters through the yarn passage hole of the turntable, and forms a yarn air ring through the rotation of the turntable and the flying wing to achieve twisting; The yarn is then fed into the center of the left main shaft and exits from the shaft end to enter the yarn loop for retwisting and overfeeding.

7. The twisting method of the primary and secondary twisting integrated machine as described in claim 1, characterized in that: Step 6) specifically involves: when the yarn guide head moves to the left, i.e. 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, using the elastic force of the coil spring to offset part of the tension on the yarn; conversely, when the yarn guide head moves to the right, i.e. 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