Straight-pulling type two-for-one twisting device

Abstract

The utility model discloses a straight pulling type two-for-one twisting device. The straight pulling type two-for-one twisting device comprises a sequencing stretching unit capable of making yarns become tight from loose and a rotary twisting unit for twisting the tight yarns. The sequencing stretching unit comprises a center guide rod used for being arranged on a yarn cylinder in a sleeving mode, a static base is arranged below the center guide rod, a yarn guide element is arranged on the static base, and through the design of the sequencing stretching unit, when yarn is pulled out of the yarn cylinder, the yarn enters through a first yarn guide hole, then in the process of pulling the yarn cylinder, the yarn is guided by the yarn guide element, and the yarn cylinder is pulled out. In the process, in the process of passively pulling the yarn cylinder to rotate, the yarns are gradually arranged in order and are compacted along with the path guide of the yarn guide element, and the compacted yarns have good uniformity and compactness before entering the rotary twisting unit, so that the yarns can be directly twisted; therefore, a special horizontal or vertical winding twisting machine does not need to be configured as front equipment, so that not only is the equipment investment reduced, but also the operation cost of an enterprise is reduced.

Description

Technical Field

[0001] The present application belongs to the field of textile machinery, and in particular to a direct-pull type two-for-one twisting device. Background Art

[0002] The current intelligent one-step twisting machine adopts a unique design in the initial twisting process, that is, the bobbin remains stationary, and the unwinding and initial twisting of the yarn are achieved by rotating the spindle wing. However, when this efficient twisting machine attempts to connect with the traditional wire drawing machine winding system that does not have a twisting function, it reveals obvious incompatibility. The yarn bundles after winding in the traditional wire drawing machine tend to loosen during the stretching process, and the lengths are uneven. This unevenness can easily cause the yarn bundles to knot at the wire holes of the spindle wing, forming difficult-to-handle entanglements, which seriously affects production efficiency.

[0003] More importantly, the intelligent one-step twisting machine is equipped with a highly sensitive automatic control system, which has strict requirements on the uniformity and tightness of the raw material tow. Directly using the tow wound by the traditional wire drawing machine as raw material will frequently trigger the system shutdown protection mechanism, seriously interfering with the normal operation of the production line.

[0004] In order to solve this problem, enterprises have to invest in special horizontal or vertical winding and twisting machines as the front equipment of the intelligent one-step twisting machine. These front equipment can pre-twist the tows to ensure that the tows have a certain degree of twist and uniformity before entering the twisting machine, so as to meet the needs of subsequent production. However, this additional investment undoubtedly increases the operating costs and production complexity of the enterprise. It can be seen that the existing technology needs to be further improved and enhanced. Utility Model Content

[0005] The utility model provides a direct-pull type two-for-one twisting device, which is used to solve the incompatibility and additional cost investment between an intelligent one-step twisting machine and a traditional wire drawing machine winding system.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A direct-pull type two-for-one twisting device includes a sequential stretching unit capable of making the yarn from loose to compact and a rotary twisting unit for twisting the compact yarn;

[0008] The sequence stretching unit comprises a central guide rod for sleeved yarn tube, a stationary base is arranged below the central guide rod, a yarn guide element is arranged on the stationary base, the yarn guide element has a first yarn guide hole and a second yarn guide hole, which are respectively located at the upper and lower sides of the stationary base, a third yarn guide hole is arranged on the stationary base, the second yarn guide hole corresponds to the third yarn guide hole, the first yarn guide hole guides the starting end of the yarn to enter, and pulls the yarn tube to make it rotate passively;

[0009] The rotation and twisting unit includes a hollow spindle, which is rotatably connected to a stationary base and whose cavity communicates with the third yarn guide hole. A moving twisting disc is fixedly arranged on the hollow spindle. The fourth yarn guide hole opened on the side of the moving twisting disc communicates with the internal cavity of the hollow spindle. The yarn is led out from the fourth yarn guide hole and rises to the roller to achieve yarn twisting.

[0010] In the direct-drawing type double-twisting device of the present application, through the design of the sequencing and stretching unit, when the yarn is pulled out from the yarn bobbin, it enters through the first yarn guide hole. Subsequently, during the process of pulling the yarn bobbin, the yarn is guided by the yarn guiding element and sequentially passes through the second yarn guide hole, the third yarn guide hole, and the fourth yarn guide hole and is introduced into the roller. During this process, while the yarn is being passively pulled to rotate the yarn bobbin, and along with the path guidance of the yarn guiding element, it is gradually arranged neatly and compacted. Before the compacted yarn enters the rotation and twisting unit, it already has good neatness and compactness and can be directly subjected to twisting treatment. Therefore, there is no need to configure a dedicated horizontal or vertical winding and twisting machine as a pre-set device, which not only reduces equipment investment but also lowers the operating cost of the enterprise. The entire production process is more concise and efficient, improving the overall production efficiency.

[0011] In a preferred implementation, the diameter of the moving twisting disc is larger than the diameter of the stationary base to prevent the yarn path of the rising section of the yarn from contacting and interfering with the yarn path of the stretching section of the yarn.

[0012] Increasing the diameter of the moving twisting disc can effectively avoid yarn path interference and ensure the smooth transmission of the yarn. During the rising process of the yarn, due to the rotation of the moving twisting disc and the tension of the yarn itself, an air ring will be formed around the moving twisting disc, which helps the yarn maintain a certain tension and stability, making the twisting more uniform and efficient.

[0013] In a preferred implementation, the stationary base is provided with a fixed magnet, the moving twisting disc is made of a non-magnetic material, and the fixed magnet is magnetically attracted to an external magnet of the same height, keeping the stationary base stationary.

[0014] In a preferred implementation, the moving twisting disc includes a bearing disc, on which a rotating yarn guide disc is carried. The edge of the rotating yarn guide disc has an upward-curving arc. The diameter of the rotating yarn guide disc is larger than the diameter of the stationary base. The bearing disc is provided with a fourth yarn guide hole, and the yarn is led out from the fourth yarn guide hole and rises after contacting the upward-curving edge of the rotating yarn guide disc.

[0015] The split design allows the use of different materials or optimization of the material usage to reduce costs. The upward-curving arc design of the edge of the rotating yarn guide disc can more effectively guide the yarn to rise along the predetermined path, reducing the offset and winding of the yarn during rotation, improving the uniformity and stability of yarn twisting. The lightweight design reduces the inertial force during rotation, making the moving twisting disc easier to start and stop, thereby improving the rotation efficiency and saving energy during the operation of the equipment.

[0016] In a preferred implementation, a power transmission sleeve is fixedly connected to the bottom of the carrier plate, and rotating the power transmission sleeve can drive the hollow spindle.

[0017] In a preferred implementation, a protective sleeve is further included. One end of the protective sleeve is arranged inside the power transmission sleeve without contact between them, and the other end extends to the end of the hollow spindle. The hollow spindle can rotate within the protective sleeve.

[0018] In a preferred implementation, porcelain eyes are provided in both the first yarn guiding hole and the second yarn guiding hole on the yarn guiding element.

[0019] Due to the low-friction property of its material, the porcelain eye can significantly reduce the friction between the yarn and the hole wall when the yarn passes through the yarn guiding hole. The yarn can flow more smoothly, reducing the risk of yarn damage, breakage, or increased hairiness caused by friction, thereby improving the quality of the final product.

[0020] In a preferred implementation, the yarn guiding element includes a horizontal plate and a vertical plate perpendicular to each other. The vertical plate is provided with the first yarn guiding hole and the second yarn guiding hole. The horizontal plate is detachably connected to the stationary base, and different lengths of the horizontal plate are selected to adjust the distance between the vertical plate and the yarn bobbin.

[0021] In a preferred implementation, the third yarn guiding hole includes a lateral guiding channel and a vertical docking channel that are interconnected. The lateral guiding channel corresponds to the second guiding hole, and the vertical docking channel is connected to the inner cavity of the hollow spindle.

[0022] In a preferred implementation, the central guide rod is provided with a rotation assisting assembly. When the yarn bobbin is sleeved outside the central guide rod, the rotation assisting assembly can assist the yarn bobbin to rotate. Description of the Drawings

[0023] The drawings described herein are used to provide a further understanding of the present utility model and form a part of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present application and do not constitute an improper limitation to the present utility model. In the drawings:

[0024] Figure 1 A schematic three-dimensional structural diagram of a direct drawing type doubling and twisting device of the present application is shown;

[0025] Figure 2 A schematic three-dimensional structural diagram of a direct drawing type doubling and twisting device of the present application for installing a yarn bobbin is shown;

[0026] Figure 3 A schematic sectional structural diagram of a direct drawing type doubling and twisting device of the present application is shown;

[0027] Figure 4 Shows a schematic three - dimensional structure diagram of another exemplary embodiment of the direct - drawing type doubling and twisting device of the present application;

[0028] Figure 5 Shows a schematic three - dimensional structure diagram of an exemplary embodiment of the hollow spindle of the present application;

[0029] Figure 6 Shows a schematic three - dimensional structure diagram of an exemplary embodiment of the part of the stationary base provided with the third yarn guiding hole of the present application;

[0030] Figure 7 Shows a schematic three - dimensional structure diagram of an exemplary embodiment of the double - threading of the direct - drawing type doubling and twisting device of the present application;

[0031] Label description:

[0032] 1 - central guide rod; 10 - stationary base; 110 - third yarn guiding hole; 1100 - lateral guiding channel; 1101 - vertical docking channel; 12 - yarn guiding element; 120 - horizontal plate; 121 - vertical plate; 1210 - first yarn guiding hole; 1211 - second yarn guiding hole; 13 - fixed magnet; 20 - hollow spindle; 200 - side hole; 21 - moving twisting turntable; 210 - bearing plate; 2100 - fourth yarn guiding hole; 211 - rotating yarn guiding disc; 22 - power transmission sleeve; 23 - protective sleeve; 3 - first bearing; 4 - second bearing; 5 - yarn bobbin. Detailed implementation manners

[0033] In the following, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.

[0034] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present invention. In the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium.

[0035] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a direct connection, or an indirect connection through an intermediate medium, and may be the communication inside two components or the interaction relationship between two components. However, indicating a direct connection means that there is no connection relationship constructed through an excessive structure between the two connected main bodies, and they are only connected through the connection structure to form an integral body. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] In the present utility model, descriptions such as "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first", "second" may explicitly or implicitly include at least one such feature.

[0037] The present utility model will be described below in conjunction with the accompanying drawings of the specification.

[0038] The specific solution adopted is as follows:

[0039] As Figure 1-7 shown, the present utility model provides a direct-drawing type doubling and twisting device, which includes an orderly stretching unit capable of stretching the yarn from loose to tight and a rotary twisting unit for twisting the tight yarn.

[0040] The orderly stretching unit includes a central guide rod 1 for sleeving a yarn bobbin 5. A stationary base 10 is arranged below the central guide rod 1. The stationary base is provided with a yarn guiding element 12. The yarn guiding element has a first yarn guiding hole 1210 and a second yarn guiding hole 1211, which are respectively located on the upper and lower sides of the stationary base. A third yarn guiding hole 110 is arranged on the stationary base. The third yarn guiding hole includes a laterally guiding channel 1100 and a vertically butting channel 1101 that are communicated with each other. The laterally guiding channel corresponds to the second guiding hole 1211, and the vertically butting channel is communicated with the inner cavity of the hollow spindle 20. The first yarn guiding hole guides the starting end of the yarn to enter and pulls the yarn bobbin to rotate passively.

[0041] The rotary twisting unit includes a hollow spindle 20, which is rotatably connected to the stationary base and whose cavity is communicated with the third yarn guiding hole. A moving twisting turntable 21 is fixedly arranged on the hollow spindle. A fourth yarn guiding hole 2100 opened on the side surface of the moving twisting turntable is communicated with the inner cavity of the hollow spindle. The yarn is led out from the fourth yarn guiding hole and rises to the roller to realize yarn twisting.

[0042] For the thread passing path of this application, refer to Figure 2, Section AB: The starting end of the yarn is inserted into the first yarn guide hole; Section BC: The yarn is inserted from the first yarn guide hole into the second yarn guide hole; Section CD: The yarn enters the lateral guide channel from the second yarn guide hole; Section DE: The yarn enters the vertical docking channel from the lateral guide channel and then enters the inner cavity of the hollow spindle; Section EF: The yarn enters the fourth yarn guide hole horizontally through the side hole 200 of the hollow spindle; FG: The yarn is introduced into the roller and enters the subsequent mechanism.

[0043] In the above structure, through the design of the sequencing and stretching unit, as the yarn is pulled, the yarn bobbin rotates passively, and the yarn is subjected to a certain amount of stretching and tension, making the originally loose yarn gradually become tight and orderly. This step effectively improves the physical state of the yarn, provides good conditions for subsequent twisting. Before entering the rotary twisting unit, the yarn has reached a high degree of tightness and regularity, so there is no need for a horizontal or vertical winding and twisting machine for pre-twisting treatment. This greatly simplifies the production process, reduces the investment in equipment costs, and at the same time reduces the conversion costs and complexity between equipment, reduces the docking links between equipment, which means reducing downtime and adjustment time, thus improving the overall production efficiency.

[0044] The rotary twisting unit realizes the twisting of the yarn through the rotation of the hollow spindle 20 and the cooperation of the moving twisting turntable 21. The twisting principle is the existing double-twisting principle. Section DE rotates around its own axis, and section EFG revolves around section DE. Both section DE and section EFG obtain twist. Since the yarn already has good tightness and regularity before entering the twisting unit, the twisting process is more smooth and efficient. It reduces the need for additional investment in special winding and twisting machines, reduces the operating costs of enterprises, and has significant economic benefits.

[0045] As a preferred embodiment of the present application, the diameter of the moving twisting turntable 21 is larger than the diameter of the stationary base 10 to prevent the yarn path of the rising section of the yarn from contacting and interfering with the yarn path of the yarn stretching section.

[0046] If the diameter of the moving twisting turntable is less than or equal to the diameter of the stationary base, the yarn may contact or interfere with the yarn path of the stretching section during the rising process, resulting in problems such as yarn knotting, breaking, or uneven twisting. Therefore, increasing the diameter of the moving twisting turntable can effectively avoid this path interference and ensure the smooth transmission of the yarn. During the rising process of the yarn, due to the rotation of the moving twisting turntable and the tension of the yarn itself, an air ring will be formed around the moving twisting turntable. This air ring is beneficial to the twisting process of the yarn because it helps the yarn maintain a certain tension and stability, making the twisting more uniform and efficient. If the diameter of the moving twisting turntable is too small, it may not be able to form a large enough air ring, thus affecting the twisting effect.

[0047] See Figure 1, the stationary base is provided with a fixed magnet 13. The moving twisting turntable is made of non-magnetic material. The fixed magnet is magnetically attracted to the magnet of the same height outside the device, so that the upper part of the stationary base remains stationary. Specifically, the magnetic field generated by the magnet ensures that the stationary base remains non-rotating during the twisting process. The moving twisting turntable can rotate freely without being interfered by the magnet to complete the twisting work of the yarn. The yarn is led out from the yarn bobbin, passes through the yarn guiding element, and then is pulled into the moving twisting turntable for twisting. Due to the rotation of the moving twisting turntable, the yarn is subjected to a pulling force during the rising process. This pulling force is transmitted to the yarn bobbin through the yarn, causing it to rotate passively, thereby realizing the sequential stretching of the yarn, that is, the yarn remains orderly and uniform during the stretching process.

[0048] As a preferred embodiment of the present application, refer to Figure 1 and Figure 3 , the moving twisting turntable includes a bearing plate 210. A rotating yarn guiding plate 211 is carried on the bearing plate. The edge of the rotating yarn guiding plate has an upward curvature. The rotating yarn guiding plate is installed between the pressing plate and the bearing plate. The diameter of the rotating yarn guiding plate is larger than the diameter of the stationary base. The bearing plate is provided with a fourth yarn guiding hole. The yarn is led out from the fourth yarn guiding hole and then rises after contacting the upward edge of the rotating yarn guiding plate. This split design allows the use of different materials or optimization of material usage to reduce costs. For example, the bearing plate may be made of a stronger but less costly material, while the rotating yarn guiding plate may be made of wear-resistant and low-friction materials to improve the smoothness of yarn sliding.

[0049] In addition, the upward curvature design of the edge of the rotating yarn guiding plate 211 can more effectively guide the yarn to rise along a predetermined path, reducing the deviation and entanglement of the yarn during rotation, and improving the uniformity and stability of yarn twisting. And the bearing plate can be designed to be strong enough but not too heavy to support the weight of the rotating yarn guiding plate and the yarn. Since the main function of the rotating yarn guiding plate is to guide the yarn to rise, it can be designed to be lighter and thinner to reduce the inertial force during rotation and improve the rotation efficiency. The lightweight design reduces the inertial force during rotation, making the moving twisting turntable easier to start and stop, thereby improving the rotation efficiency. The equipment can save energy during operation, which is particularly important for long-running yarn processing equipment.

[0050] Refer to Figure 3, the bottom of the carrier plate is fixedly connected to the power transmission sleeve 22. Rotating the power transmission sleeve can drive the hollow spindle 20. It also includes a protective sleeve 23. One end of the protective sleeve is placed inside the power transmission sleeve without contact between them, and the other end extends to the end of the hollow spindle. The hollow spindle can rotate inside the protective sleeve. Specifically, one end of the hollow spindle is connected to the stationary base through the first bearing 3, and the other end is connected to the second bearing 4 inside the protective sleeve. The power transmission sleeve is fixedly connected to the carrier plate. Rotating the power transmission sleeve can activate the hollow spindle, driving the carrier plate and the rotating yarn guide plate to rotate.

[0051] As a preferred embodiment of the present application, porcelain eyes are provided in both the first yarn guide hole and the second yarn guide hole on the yarn guiding element. The porcelain eyes are not shown. They are products of the prior art. Due to the low-friction characteristics of their material, the porcelain eyes can significantly reduce the friction between the yarn and the hole wall when the yarn passes through the yarn guide hole. The yarn can flow more smoothly, reducing the risk of yarn damage, breakage, or increased hairiness caused by friction, thereby improving the quality of the final product. In addition, smooth transition surfaces are provided in all the holes through which the yarn passes, which can ensure that the friction suffered by the yarn when passing through these holes is further reduced. This design makes the flow of the yarn smoother, reducing the resistance and heat generated by friction and reducing physical damage to the yarn, such as scratches and indentations.

[0052] As a preferred embodiment of the present application, the yarn guiding element includes a horizontal plate 120 and a vertical plate 121 that are perpendicular to each other. The vertical plate is provided with a first yarn guide hole 1210 and a second yarn guide hole 1211. The horizontal plate can be bolted to the stationary base, and horizontal plates of different lengths are selected to adjust the distance between the vertical plate and the yarn bobbin.

[0053] As a preferred embodiment of the present application, the central guide rod is provided with a rotation assisting assembly. When the yarn bobbin 5 is sleeved outside the central guide rod, the rotation assisting assembly can assist the rotation of the yarn bobbin.

[0054] The rotation assisting assembly is, for example, a bearing. When the yarn bobbin is sleeved outside the central guide rod, its inner wall abuts against the outer ring of the bearing, not shown in the figure. Or a coating, such as a low-friction material like polytetrafluoroethylene (PTFE), is applied to the surface of the stationary base, which can also effectively reduce the excessive frictional resistance during rotation, thereby assisting the rotation of the yarn bobbin.

[0055] See Figure 7 , the present application can also achieve double threading. Specifically, the yarn of the external yarn bobbin is threaded into the bottom of the hollow spindle from the bottom of the present application, then passes out through another fourth yarn guide hole of the carrier plate, and then rises along the bottom of the rotating yarn guide plate to twist with another yarn that goes from top to bottom at the roller, achieving single-spindle two-in-one twisting. Further, applying three such spindles to a one-step twisting machine can effectively solve the problem of polyester-propylene mixed twisting in a one-step twisting machine.

[0056] What is not described in this utility model can be realized by adopting or referring to the existing technologies.

[0057] The above is only the specific implementation manner of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by this utility model can easily think of various changes or substitutions thereof, and these should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model shall be subject to the protection scope of the claims.

Claims

1. A Czochralski type doubling twisting device, characterized in that, It includes an ordered stretching unit capable of stretching the yarn from loose to tight and a rotary twisting unit for twisting the tight yarn; The ordered stretching unit includes a central guide rod for sleeving the yarn bobbin. A stationary base is arranged below the central guide rod. The stationary base is provided with a yarn guiding element which has a first yarn guiding hole and a second yarn guiding hole respectively located on the upper and lower sides of the stationary base. A third yarn guiding hole is provided in the stationary base. The second yarn guiding hole corresponds to the third yarn guiding hole. The first yarn guiding hole guides the starting end of the yarn to enter, and the yarn bobbin is pulled to rotate passively; The rotary twisting unit includes a hollow spindle which is rotatably connected to the stationary base and whose cavity communicates with the third yarn guiding hole. A moving twisting turntable is fixed on the hollow spindle. A fourth yarn guiding hole opened on the side surface of the moving twisting turntable communicates with the inner cavity of the hollow spindle. The yarn is led out from the fourth yarn guiding hole and rises to the roller to realize yarn twisting.

2. The direct drawing type doubling twisting device according to claim 1, wherein The diameter of the moving twisting turntable is larger than that of the stationary base to prevent the yarn path of the rising section of the yarn from contacting and interfering with the yarn path of the stretching section of the yarn.

3. The draw-type doubling twisting device according to claim 2, wherein, The stationary base is provided with a fixed magnet. The moving twisting turntable is made of a non-magnetic material. The fixed magnet is magnetically attracted to an external magnet of the same height to keep the stationary base stationary.

4. The draw-type doubling twisting device according to claim 2, characterized in that, The moving twisting turntable includes a bearing plate. A rotary yarn guiding disc is carried on the bearing plate. The edge of the rotary yarn guiding disc has an upward curvature. The diameter of the rotary yarn guiding disc is larger than that of the stationary base. The bearing plate is provided with a fourth yarn guiding hole. The yarn is led out from the fourth yarn guiding hole and rises after contacting the upward edge of the rotary yarn guiding disc.

5. The draw-type doubling twisting device according to claim 4, characterized in that, A power transmission sleeve is fixedly connected to the bottom of the bearing plate. Rotating the power transmission sleeve can drive the hollow spindle.

6. The draw-twisting device according to claim 5, characterized in that, It further includes a protective sleeve. One end of the protective sleeve is placed in the power transmission sleeve without contact, and the other end extends to the end of the hollow spindle. The hollow spindle can rotate within the protective sleeve.

7. The draw-type doubling twisting device according to claim 1, characterized in that Porcelain eyes are provided in both the first yarn guiding hole and the second yarn guiding hole on the yarn guiding element.

8. The draw-type doubling twisting device according to claim 1, characterized in that, The yarn guiding element includes a horizontal plate and a vertical plate which are perpendicular to each other. The vertical plate is provided with the first yarn guiding hole and the second yarn guiding hole. The horizontal plate is detachably connected to the stationary base. Different lengths of the horizontal plate are selected to adjust the distance between the vertical plate and the yarn bobbin.

9. The draw-twisting device according to claim 1, wherein, The third yarn guiding hole includes a lateral guiding channel and a vertical docking channel which are communicated with each other. The lateral guiding channel corresponds to the second guiding hole, and the vertical docking channel is communicated with the inner cavity of the hollow spindle.

10. A Czochralski type doubling twisting device according to claim 1, characterized in that, The central guide rod is provided with a rotation assisting assembly. When the yarn bobbin is sleeved outside the central guide rod, the rotation assisting assembly can assist the yarn bobbin to rotate.

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