Cable production line

Abstract

The invention relates to the technical field of power-on cables, and provides a cable production line which comprises a cable core preprocessing module, a cable core processing module and a cable forming module, the cable core preprocessing module is used for preliminarily processing wires, the cable core processing module is used for twisting the processed wires and forming a polyurethane coating on the surface of a twisted wire, and the cable forming module is used for forming a cable on the surface of the twisted wire. And the cable forming module is used for adding an insulating layer on the composite wire to form a final product. According to the technical scheme, the problem that only thinner conductor monofilaments can be selected for improving the flexibility of the existing cable is solved, and the uniform polyurethane elastic buffer layer is constructed on the surface of the cable conductor in situ, so that the flexibility of the cable is improved on the premise of ensuring the mechanical strength of the conductor. The bending fatigue resistant life, the interface adhesive force and the long-term use reliability of the cable are remarkably improved, and the core bottleneck of high-end flexible cable manufacturing is solved.

Description

Technical Field

[0001] This invention relates to the field of electrical cable technology, specifically to a cable production line. Background Technology

[0002] The mainstream cable manufacturing process typically involves: wire drawing → annealing → stranding → insulation extrusion → cooling → winding. For flexible cables used in robots, automated equipment, cable chain systems, and high-frequency bending applications, the long-term reliability and lifespan depend crucially on the interface performance between the conductor and insulation layer. Under repeated dynamic bending and torsion, the interface between the insulation layer and conductor of traditional cables is prone to micro-cracks, peeling, or even breakdown due to stress concentration, leading to unstable signal transmission.

[0003] To improve flexibility, the industry commonly uses thinner conductor filaments. However, while thinner filaments can improve flexibility, they reduce the mechanical strength and fatigue resistance of the conductor, and increase production costs and process complexity.

[0004] Therefore, a new cable production line is urgently needed. Summary of the Invention

[0005] This invention proposes a cable production line that solves the problem that existing cables can only use thinner conductor filaments to improve flexibility.

[0006] The technical solution of the present invention is as follows: A cable production line includes a wire core pretreatment module, a wire core processing module, and a cable forming module arranged sequentially. The wire core pretreatment module includes a wire feeding frame, a wire pulling wheel, an annealing assembly, and a first take-up wheel arranged in sequence. The wire feeding frame holds the wire, and there are two wire pulling wheels. The wire is wound between the two wire pulling wheels to achieve pulling. The wire passes through the annealing assembly for annealing and is taken into the first take-up wheel. The core processing module includes a first winding cage, a first conductor assembly, a second winding cage, a second conductor assembly, a spraying assembly, a metering assembly, and a second take-up reel arranged sequentially. Both the first and second winding cages are equipped with multiple core coils. The first winding cage rotates clockwise, and the second winding cage rotates counterclockwise. The wire exiting the first winding cage enters the second winding cage to form a composite wire. The spraying assembly includes a nozzle that sprays a water-based polyurethane dispersion onto the surface of the composite wire. The metering assembly measures the length of the composite wire. The second take-up reel is used to collect the composite wire. The cable forming module includes a traction component, an extruder, a cooling component, a breakdown test component, and a finished product take-up reel arranged in sequence. The traction component is used to release the composite wire on the second take-up reel. The composite wire passes through the extruder and forms a finished cable. The cooling component is used to cool the finished cable. The breakdown test component is used to measure the breakdown strength of the insulation layer of the finished cable. The finished product take-up reel is used to take up the finished cable. The spraying assembly further includes a spraying channel, baffles, absorption tubes, and negative pressure tubes. The spraying channel is located between the second conductor assembly and the metering assembly. The composite wire passes through the spraying channel. There are two sets of baffles, which are respectively arranged on both sides of the spraying channel and used to block the spraying channel. The baffles have wire-passing holes, through which the composite wire passes. There are two absorption tubes, which are arranged one-to-one with the two sets of baffles. There are multiple negative pressure tubes connected to the absorption tubes. The negative pressure tubes are used to adsorb the gas in the absorption tubes.

[0007] The above technical solution innovatively introduces a water-based polyurethane spraying process with a fully enclosed negative pressure recovery function after core stranding and before insulation extrusion, fundamentally changing the traditional practice of using thinner monofilaments to improve cable flexibility. This water-based polyurethane buffer coating constructs a highly elastic mechanical transition layer between the conductor and insulation layer, which can actively absorb and disperse dynamic bending stress, thereby significantly improving the overall bending fatigue life and long-term reliability of the cable without changing the original specifications and strength of the conductor. At the same time, the closed negative pressure spraying system realizes environmentally friendly and efficient online coating, successfully embedding interface functionalization treatment into a continuous production line, forming an integrated solution for the stable production of high-performance flexible cables.

[0008] As a further technical solution, the multiple negative pressure tubes are divided into two groups, and the two groups of negative pressure tubes correspond to two absorption tubes respectively. Within the same group of negative pressure tubes, the suction force of the negative pressure tube closer to the baffle plate is greater than the suction force of the negative pressure tube farther away from the baffle plate.

[0009] The above technical solution utilizes a negative pressure pipe positioned closer to the baffle plate to generate greater suction, creating a suction gradient field from the outside in. This design can more accurately and powerfully capture the minute amount of mist escaping from the through-hole, especially in the turbulent airflow area near the baffle plate, ensuring the reliability and stability of the sealing effect and further solidifying the effectiveness of environmentally friendly production.

[0010] As a further technical solution, the same set of baffles includes two baffles, and the diameter of the wire-passing hole on the baffle closer to the spraying channel is smaller than the diameter of the wire-passing hole on the baffle farther from the spraying channel.

[0011] The above technical solution greatly increases the path resistance and collision probability of droplet escape without contacting or abrading the conductor, so that the vast majority of droplets are captured by the negative pressure system before reaching the outer orifice. This strengthens the sealing effect in terms of physical structure, reduces the absolute dependence on external negative pressure suction, and makes the system more energy-efficient and reliable.

[0012] As a further technical solution, the two baffles in the same group are fixed by welding, and the negative pressure pipe is fixed to the baffle away from the spraying channel by welding.

[0013] The above technical solution involves welding and fixing two baffle plates together, and welding the negative pressure pipe to the outer baffle plate, forming a rigid, integrated sealing-adsorption functional unit. This structure ensures absolute sealing between the baffle plates and between the negative pressure pipe and the baffle plates, preventing air leakage at the connection points due to vibration or airflow, thereby guaranteeing efficient transmission of negative pressure adsorption force and long-term mechanical stability.

[0014] As a further technical solution, the baffle plate is fixed to the spraying channel in a detachable manner.

[0015] The detachable connection between the baffle plate and the spraying channel, achieved through the above technical solution, gives the core sealing unit a modular characteristic. This facilitates the quick replacement of modules with baffle plates of different aperture sizes to accommodate cables of different diameters, and also simplifies daily maintenance, cleaning, and component replacement, greatly improving the flexibility and maintainability of the production line.

[0016] As a further technical solution, the nozzle is an ultrasonic atomizing nozzle.

[0017] The above technical solution, employing an ultrasonic atomizing nozzle, can break down waterborne polyurethane dispersions into extremely uniform and fine micro-mist particles. This atomization effect allows the coating to more evenly and densely coat the surface of a high-speed moving conductor, forming a uniform and flawless buffer coating. This is the key technological foundation for ensuring the consistency of the coating's interfacial performance.

[0018] As a further technical solution, the spraying assembly also includes a collection pipe, which is disposed on the spraying channel and communicates with the internal space of the spraying channel. The connection between the collection pipe and the spraying channel is located below the baffle plate.

[0019] The above technical solution involves installing a collection pipe at the bottom of the spraying channel. This allows for the timely diversion and collection of excess paint droplets that settle due to oversaturation or gravity, preventing them from accumulating and dripping into the channel, thus contaminating the coated wires or interfering with the spray mist. This ensures a clean and stable working environment within the spraying chamber, providing a crucial guarantee for obtaining high-quality continuous coatings.

[0020] As a further technical solution, the spraying assembly also includes a cold air duct and a cold air support. The cold air support is connected to the outside of the spraying channel, and the cold air duct is disposed on the cold air support. The cold air duct is used to blow cold air onto the composite line coated with polyurethane coating.

[0021] The above technical solution, by setting up a cold air duct to instantly cool the freshly coated wire, accelerates the evaporation of moisture in the water-based system and the initial shaping of polyurethane molecules. This shortens the conversion time of the coating from liquid to solid, ensuring that the coating has sufficient initial strength when the wire enters the downstream metering and winding processes. This avoids adhesion, scratches, or uneven thickness caused by an undried coating, ensuring the continuity of the process and the integrity of the coating quality.

[0022] As a further technical solution, the cable forming module includes a traction component, an extruder, a cooling component, a breakdown test component, and a finished product take-up reel arranged in sequence. The traction component is used to release the composite wire on the second take-up reel. The composite wire is inserted into the extruder to form a finished cable. The cooling component is used to cool the finished cable. The breakdown test component is used to measure the breakdown strength of the insulation layer of the finished cable. The finished product take-up reel is used to take up the finished cable.

[0023] The above technical solution ensures that the composite wire is fed smoothly and with uniform tension into the extruder, which is a prerequisite for achieving uniform extrusion of the insulation layer. After extrusion, the insulation layer is quickly shaped by the cooling component, ensuring the dimensional stability and physical properties of the insulation layer. The introduction of the online breakdown testing component enables 100% real-time non-destructive testing of the electrical strength of the insulation layer, ensuring the insulation reliability of each finished cable segment and eliminating potential quality hazards that may be missed by traditional sampling inspections.

[0024] As a further technical solution, the wire core pretreatment module includes a wire feeding frame, a wire pulling wheel, an annealing assembly, and a first take-up wheel arranged in sequence. The wire feeding frame holds the wire, and there are two wire pulling wheels. The wire is wound between the two wire pulling wheels to achieve pulling. The wire passes through the annealing assembly for annealing and is taken into the first take-up wheel. The wire forms a wire core coil on the first take-up wheel.

[0025] Through the above technical solution, the cooperation between the pay-off frame and the draw wheel enables precise drawing of the wire, accurately controlling the final diameter and mechanical properties of the conductor filament. The annealing assembly effectively eliminates work hardening and internal stress generated during the drawing process, restoring the wire's ductility and conductivity, providing a base material with excellent plasticity and consistency for subsequent stranding processes. The first take-up wheel completes the orderly winding of the wire, forming a core coil that can be directly used in the stranding process, laying a solid foundation for the continuous and efficient operation of the entire production line.

[0026] As a further technical solution, the line coming out of the first winding cage passes through the center of the second winding cage, and the number of first take-up reels on the first winding cage is less than the number of first take-up reels on the second winding cage.

[0027] By employing the aforementioned technical solution, which involves setting the first and second strands to rotate in opposite directions, with the first strand threaded through the center of the second strand, and configuring different numbers of core coils, this structure can produce composite conductors with a more compact structure, higher roundness, and more balanced internal stress. A round and stable conductor substrate is an important physical prerequisite for subsequently obtaining a uniform buffer coating and a high-quality insulation layer.

[0028] As a further technical solution, a cable organizer is also included. There are multiple cable organizers, and each of the first take-up reel, the second take-up reel, and the finished take-up reel has a cable organizer in front of its inlet end.

[0029] By installing a cable organizer at the critical winding station using the above technical solution, it is possible to ensure that the wires / cables are wound in a neat and orderly manner. This avoids wire damage, uneven tension, and subsequent difficulties in unwinding caused by tangled or crushed wires, and is a fundamental device for ensuring the quality and efficiency of large-scale continuous production.

[0030] The cable production line provided by this invention includes at least the following three beneficial effects: I. This invention, through the innovative design and integration of a spraying component with a fully enclosed negative pressure recovery function, constructs a uniform polyurethane elastic buffer layer in situ on the surface of the cable conductor, fundamentally revolutionizing the traditional technical approach of relying on reducing the diameter of the conductor filaments to improve flexibility. This component achieves efficient atomization, zero-pollution coating, and rapid curing of water-based coatings. The resulting buffer layer actively absorbs and disperses the interfacial stress between the conductor and the insulation layer, thereby significantly improving the cable's bending fatigue life, interfacial adhesion, and long-term reliability while ensuring the conductor's mechanical strength, thus solving a core bottleneck in the manufacturing of high-end flexible cables.

[0031] II. This invention systematically integrates and optimizes intelligent spraying pretreatment with existing stranding and extrusion processes, forming a highly efficient, stable, and environmentally friendly continuous production line. The fully enclosed spraying process achieves near-zero emissions of volatile organic compounds and high coating utilization. Meanwhile, the collaborative design of online cold air curing, precision metering, and quality inspection ensures consistent product performance and stable production processes, realizing green, large-scale, and intelligent manufacturing of high-performance flexible cables.

[0032] Third, the production line provided by this invention possesses a high degree of modularity and process adjustability, forming a technical platform that can flexibly adapt to the development of multiple product varieties. By replacing the modular components of the spraying assembly and adjusting the functional formula of the waterborne polyurethane, the production needs of different products, from ultra-flexible drag chain cables to high-adhesion special cables, can be quickly met, greatly expanding the application scope and economic value of the production line and enhancing its market competitiveness. Attached Figure Description

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0034] Figure 1 This is a schematic diagram of the core pretreatment module in this invention; Figure 2 This is a schematic diagram of the core processing module in this invention; Figure 3 This is a structural schematic diagram of the cable forming module in this invention; Figure 4 This is a schematic diagram of the spraying assembly in this invention; Figure 5 yes Figure 4 The right view; Figure 6 This is a schematic diagram of the structure at the junction of the absorption tube and the negative pressure tube in this invention; Figure 7 This is a schematic diagram of the baffle plate in this invention; Figure 8 This is a schematic diagram of the cleaning tube in this invention.

[0035] In the picture: 1. Pay-off frame; 2. Pull reel; 3. Annealing assembly; 4. First take-up reel; 5. First auger; 6. First conductor assembly; 7. Second auger; 8. Second conductor assembly; 9. Spraying assembly; 10. Metering assembly; 11. Second take-up reel; 12. Traction assembly; 13. Extruder; 14. Cooling assembly; 15. Breakdown test assembly; 16. Finished product take-up reel; 17. Wire organizer; 18. Composite wire spool; 19. Conductor frame; 20. Cold water tank; 21. Tensioner; 22. Wire feeding assembly; 901. Spray nozzle; 902. Spraying channel; 903. Baffle plate; 904. Absorption pipe; 905. Negative pressure pipe; 906. Collection pipe; 907. Cold air bracket; 908. Cold air duct; 909. Cleaning pipe. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0037] pass Figures 1 to 8 The present invention will be described in detail below.

[0038] See Figures 1 to 3 This invention provides a cable production line, mainly used for producing composite cables. The cable production line includes a core pretreatment module, a core processing module, and a cable forming module. The core pretreatment module performs preliminary processing on the wires; the core processing module strands the processed wires and forms a polyurethane coating on the surface of the stranded wires; and the cable forming module adds an insulation layer to the composite cable to form the final product.

[0039] See Figure 1 The wire core pretreatment module includes a wire feeding frame 1, a wire pulling wheel 2, an annealing assembly 3, and a first take-up wheel 4 arranged sequentially. The wire feeding frame 1 is used to hold the unprocessed wire. The wire enters the wire pulling wheel 2 from the wire feeding frame 1. There are two wire pulling wheels 2, and the wire is wound between the two wire pulling wheels 2. The wire pulling wheels 2 are actively rotating. After the wire passes through the two wire pulling wheels 2, it is pulled, and the diameter of the wire decreases. By controlling the number of turns of the wire and the rotation speed of the wire pulling wheels 2, the final diameter of the wire can be controlled.

[0040] See Figure 1 After exiting the drawing reel 2, the wire enters the annealing assembly 3 for annealing to reduce internal stress. The annealing assembly 3 includes a heater with a heating channel through which the wire is heated before being cooled in a water tank. The cooled wire completes the annealing process, thereby eliminating internal stress. After annealing, the wire enters the first take-up reel 4. After drawing and annealing, the wire forms the core of the cable.

[0041] See Figure 1In addition, the wire core pretreatment module also includes a wire guide 19, a cold water tank 20, a tensioner 21, and a wire organizer 17. The wire guide is located between the wire release frame 1 and the pull reel 2. The wire guide is used to pull the wire to prevent slack between the pull reels 2, which would prevent the wire from failing to pull effectively. The cold water tank 20 is located behind the heater and is used to quickly cool the heated wire, thus giving the wire a better annealing effect and resulting in a core with better plasticity to withstand the significant bending required in actual use. The tensioner 21 is located between the cold water tank and the wire organizer 17. The tensioner 21 has a guide wheel whose outer edge contacts the wire. The tension of the wire is adjusted by the movement of the guide wheel. After passing through the wire organizer 17, the wire can be wound onto the first take-up reel 4. The function of the wire organizer 17 is to guide the wire and orderly wind it onto the first take-up reel 4.

[0042] After the wire is turned into a wire core coil in the wire core pretreatment module, it will enter the wire core processing module.

[0043] See Figure 2 The wire core processing module includes a first winding cage 5, a first conductor assembly 6, a second winding cage 7, a second conductor assembly 8, a spraying assembly 9, a metering assembly 10, and a second take-up reel 11 arranged sequentially. Both the first winding cage 5 and the second winding cage 7 are actively rotating, with the first winding cage 5 rotating clockwise and the second winding cage 7 rotating counterclockwise (i.e., their rotation directions are opposite). Multiple wire core coils are mounted on both the first and second winding cages. The first winding cage 5 is used to twist multiple wire cores into a main wire, which then passes through the center of the second winding cage 7 and twists with the wire cores on the second winding cage 7 to form a composite wire. The first winding cage 5 has six wire core coils, and the second winding cage 7 has eight. Because the rotation directions of the first winding cage 5 and the second winding cage 7 are opposite, the strands within the composite wire are not only divided into two sides but also bundled together. The structures of the first winding cage 5 and the second winding cage 7 are identical.

[0044] The first conductor assembly 6 and the second conductor assembly 8 have identical structures, and both guide the twisted wires. Guiding the moving cable helps improve its stability during movement.

[0045] Since the formed cables are mostly used in places with a lot of bending, a water-based polyurethane dispersion is sprayed on the surface of the composite cable. After the water evaporates, the water-based polyurethane dispersion will form a polyurethane coating on the surface of the composite cable. The polyurethane coating has excellent tensile elasticity. When the cable is bent, it can absorb and disperse the concentrated stress at the interface between the conductor and the insulation layer through its own deformation, preventing the insulation layer from developing micro-cracks due to repeated bending.

[0046] See Figure 2 , Figures 5 to 8 The spraying assembly 9 includes a spraying channel 902, nozzles 901, baffles 903, an absorption tube 904, and a negative pressure tube 905. The spraying channel 902 is located between the second guide wire assembly 8 and the metering assembly 10. Multiple nozzles 901 are spaced apart inside the spraying channel 902. Guide wires pass under the nozzles 901. Since the nozzles 901 are ultrasonic atomizing nozzles, the waterborne polyurethane dispersion forms a mist within the spraying channel 902, thus coating the surface of the guide wires. To prevent the mist from escaping to the outside of the spraying channel 902, baffles 903 are installed at both ends of the spraying channel 902. The baffles 903 are detachably fixed to the spraying channel 902 and have openings for guide wires. The composite line can pass through the wire hole to the spraying channel 902. The baffle plate 903 will block most of the mist. Although a small amount of mist will still escape to the outside of the spraying channel 902 through the wire hole, the absorption tube 904 is set on the baffle plate 903. At the same time, the absorption tube 904 is connected to the negative pressure tube 905. The negative pressure tube 905 is connected to the external negative pressure device. Through the negative pressure device, a negative pressure state is generated in the absorption tube 904. At this time, when a small amount of mist enters the absorption tube 904 through the wire hole, it will be sucked away by the negative pressure device through the negative pressure tube 905, and finally, no matter escapes into the working environment.

[0047] See Figure 2 , Figures 5 to 8 To prevent the baffle plates 903 from rubbing against each other during the movement of the composite line, two baffle plates 903 are located at the same end of the spraying channel 902 and are coaxially arranged. The two baffle plates 903 are welded together, and the outer baffle plate 903 is also welded to the absorption tube 904. The structures of the two baffle plates 903 are mostly similar, except for the diameter of the through hole in the middle. The diameter of the through hole of the baffle plate 903 closer to the spraying channel 902 is larger than that of the baffle plate 903 farther from the spraying channel 902, while the diameter of the through hole of the baffle plate 903 farther from the spraying channel 902 is smaller than the inner diameter of the absorption tube 904. This design effectively reduces the diffusion of mist outside the spraying channel 902.

[0048] See Figure 2 , Figures 5 to 8To enable the polyurethane coating on the surface of the composite line to form quickly, the spraying assembly 9 also includes a cold air duct 908 and a cold air support 907. The cold air support 907 is fixedly connected to the outside of the spraying channel 902, and the cold air duct 908 is fixed on the cold air support 907. The composite line with the polyurethane coating passes through the cold air duct 908, which is connected to an external cold source device. The cold air duct 908 blows low-temperature gas onto the composite line. The temperature reduction accelerates the formation of the polyurethane coating, and the polyurethane coating will not be damaged when it enters the metering assembly 10.

[0049] Since the mist-like waterborne polyurethane dispersion will form droplets or even liquid inside the spray channel 902, in order to discharge the liquid accumulated in the spray channel 902 in a timely manner, a collection pipe 906 is provided on the spray channel 902. The collection pipe 906 is connected to the lowest point of the spray channel 902, which is conducive to the collection of liquid inside the spray channel 902.

[0050] See Figure 2 , Figures 5 to 8 In addition, to improve the adhesion of the polyurethane coating to the composite line and to clean the surface of the composite line, the spraying assembly 9 also includes a cleaning tube 909. The cleaning tube 909 is located at the inlet end of the spraying channel 902. The composite line first passes through the cleaning tube 909 and then enters the spraying channel 902. The cleaning tube 909 has cleaning bristles that can sweep across the surface of the composite line to remove impurities and dust.

[0051] See Figure 2 The metering component 10 includes a metering guide wheel and a sensor. The rotation shaft of the metering guide wheel is connected to the input end of the sensor. The outer edge of the metering guide wheel contacts the composite line. That is, the linear velocity of the outermost edge of the metering guide wheel is the same as the moving speed of the composite line. Therefore, the length of the composite line can be calculated by the sensor.

[0052] See Figure 2 In addition, the core forming module also includes a wire feeding assembly 22, which has two wire feeding wheels. The wire feeding assembly is used to feed the composite wire into the wire organizer 17, which can ensure that the composite wire remains in a straight state, which is conducive to collection.

[0053] See Figure 3The cable forming module includes a traction assembly 12, an extruder 13, a cooling assembly 14, a breakdown test assembly 15, and a finished product take-up reel 16 arranged sequentially. The composite cable from the composite cable reel 18 first enters the traction assembly 12, which provides sufficient power to move the composite cable, preventing uneven tension due to its weight during movement, which would affect the formation of the insulation layer in the extruder 13. The composite cable forms its insulation layer in the extruder 13, then enters the cooling assembly 14 for cooling, then enters the breakdown test assembly 15 for insulation testing, and finally enters the finished product take-up reel 16 for cable collection.

[0054] See Figure 3 The cooling assembly 14 includes a water-cooling tank. The cable passes through the water-cooling tank, causing the outer insulation layer to harden rapidly upon cooling. The breakdown test assembly 15 tests the cable's insulation by providing current. When the test is passed, a green light is continuously displayed, and the cable continues to move. When the test fails, a red light is displayed, accompanied by an alarm sound, and the cable stops moving. A cable feeding assembly 22 is located behind the breakdown test assembly 15. The finished cable passes through the cable feeding wheel within the cable feeding assembly 22 before entering the cable organizer 17. The cable feeding assembly 22 keeps the finished cable in a straight position, facilitating collection.

[0055] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A cable production line, characterized in that, It includes a wire core pretreatment module, a wire core processing module and a cable forming module arranged in sequence. The wire core pretreatment module is used to process raw materials into wire cores, and the cable forming module is used to process finished cables. The core processing module includes a first coil (5), a first conductor assembly (6), a second coil (7), a second conductor assembly (8), a spraying assembly (9), a metering assembly (10), and a second take-up reel (11) arranged in sequence. Both the first coil (5) and the second coil (7) are provided with multiple core coils. The first coil (5) rotates clockwise, and the second coil (7) rotates counterclockwise. The wire coming out of the first coil (5) enters the second coil (7) to form a composite wire. The spraying assembly (9) includes a nozzle (901) which sprays a water-based polyurethane dispersion onto the surface of the composite wire. The metering assembly (10) measures the length of the composite wire. The second take-up reel (11) is used to take up the composite wire. The spraying assembly (9) further includes a spraying channel (902), a baffle plate (903), an absorption tube (904), and a negative pressure tube (905). The spraying channel (902) is located between the second wire assembly (8) and the metering assembly (10). The composite wire passes through the spraying channel (902). There are two sets of baffle plates (903). The two sets of baffle plates (903) are respectively arranged on both sides of the spraying channel (902) and used to block the spraying channel (902). The baffle plate (903) has a wire hole. The composite wire passes through the wire hole. There are two absorption tubes (904) and they are arranged one-to-one with the two sets of baffle plates (903). There are multiple negative pressure tubes (905) and they are connected to the absorption tubes (904). The negative pressure tubes (905) are used to adsorb the gas in the absorption tubes (904).

2. The cable production line according to claim 1, characterized in that, The multiple negative pressure tubes (905) are divided into two groups, and the two groups of negative pressure tubes (905) correspond to the two absorption tubes (904) respectively. Within the same group of negative pressure tubes (905), the suction force of the negative pressure tube (905) closer to the baffle plate (903) is greater than the suction force of the negative pressure tube (905) farther away from the baffle plate (903).

3. A cable production line according to claim 2, characterized in that, The same set of baffles (903) includes two baffles (903), and the diameter of the wire hole on the baffle (903) closer to the spray channel (902) is smaller than the diameter of the wire hole on the baffle (903) farther away from the spray channel (902).

4. A cable production line according to claim 3, characterized in that, The two baffles (903) in the same group are fixed by welding, and the negative pressure pipe (905) is fixed by welding to the baffle (903) away from the spray channel (902).

5. A cable production line according to claim 4, characterized in that, The spraying assembly (9) also includes a collection pipe (906), which is disposed on the spraying channel (902) and communicates with the internal space of the spraying channel (902). The connection between the collection pipe (906) and the spraying channel (902) is located below the baffle plate (903).

6. A cable production line according to claim 1, characterized in that, The spraying assembly (9) also includes a cold air duct (908) and a cold air bracket (907). The cold air bracket (907) is connected to the outside of the spraying channel (902). The cold air duct (908) is disposed on the cold air bracket (907) and is used to blow cold air onto the composite line coated with polyurethane coating.

7. A cable production line according to any one of claims 1-6, characterized in that, The cable forming module includes a traction assembly (12), an extruder (13), a cooling assembly (14), a breakdown test assembly (15), and a finished product take-up reel (16) arranged in sequence. The traction assembly (12) is used to release the composite wire on the second take-up reel (11). The composite wire is inserted into the extruder (13) to form a finished cable. The cooling assembly (14) is used to cool the finished cable. The breakdown test assembly (15) is used to measure the breakdown strength of the insulation layer of the finished cable. The finished product take-up reel (16) is used to take up the finished cable.

8. A cable production line according to any one of claims 1-6, characterized in that, The wire core pretreatment module includes a wire feeding frame (1), a wire pulling wheel (2), an annealing assembly (3), and a first take-up wheel (4) arranged in sequence. The wire feeding frame (1) holds the wire. There are two wire pulling wheels (2). The wire is wound between the two wire pulling wheels (2) to achieve pulling. The wire passes through the annealing assembly (3) for annealing and is taken into the first take-up wheel (4). The wire forms a wire core roll on the first take-up wheel (4).

9. A cable production line according to any one of claims 1-6, characterized in that, The line coming out of the first winding cage (5) passes through the center of the second winding cage (7), and the number of first take-up reels (4) on the first winding cage (5) is less than the number of first take-up reels (4) on the second winding cage (7).

10. A cable production line according to any one of claims 1-6, characterized in that, It also includes a cable organizer (17), and there are multiple cable organizers (17) in front of the inlet end of the first take-up reel (4), the second take-up reel (11) and the finished take-up reel (16).

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