Method of manufacturing a spoiler

Abstract

The present application relates to the technical field of electric power equipment, and provides a manufacturing method of a spoiler, which comprises the following steps: feeding materials for manufacturing a polyvinyl chloride layer and an electric track resistant layer into an extrusion assembly respectively to obtain a composite extrusion material; embedding the composite extrusion material into a groove of a combined forming die and extending the composite extrusion material from a first end to a last end of the combined forming die in sequence; cutting the composite extrusion material at the last end of the combined forming die and placing the combined forming die in a cooling tank; taking the cooled combined forming die out of the cooling tank and separating the composite extrusion material on the combined forming die from the combined forming die to obtain the spoiler. In a high-voltage transmission line, the spoiler can effectively reduce the dancing phenomenon of a wire caused by wind force, reduce the collision risk between the wires, improve the safety and stability of the line, in addition, the light-weight polyvinyl chloride hollow structure is light in weight, easy to install, low in cost, and helpful to the reduction of the construction cost of a transmission line project, so as to facilitate large-scale popularization and application.

Description

Technical Field

[0001] This invention relates to the field of power equipment technology, and in particular to a method for manufacturing a flow disruptor. Background Technology

[0002] With the continued rapid growth in electricity demand and the accelerated pace of power development, the power industry has experienced explosive growth. Optimizing energy resource allocation, ensuring national energy security, and providing high-quality and reliable power supply for national economic and social development are the important missions of the power industry.

[0003] Galloping on multi-branched ultra-high voltage (UHV) transmission lines is characterized by low frequency, large amplitude, and one or more half-wave patterns within a span. On typical UHV lines, the galloping frequency is 0.15Hz to 1Hz, and the amplitude is 0.1 to 1 times the conductor sag within the span. The severity of conductor galloping depends on its intensity, duration, and conductor structure. The hazards of transmission line galloping include: flashover causing circuit breaker tripping and conductor arcing (including conductor damage, insufficient conductor-to-ground clearance, loose tower fasteners, cumulative galloping leading to tower fatigue damage, fatigue damage at tension strings, fatigue damage to jumpers, damage to spacers and vibration dampers, insulator string damage, and conductor strand breakage at suspension clamps and spacers due to the balancing current of the split conductor fault.

[0004] The multi-split spacer bars, widely used in power transmission lines, suffer from poor stability, low strength, and weak ability to prevent line galloping, which is far from meeting the needs of the power industry's development of ultra-high voltage, long-distance, and large-span transmission. With the continuous development of power grids and the increasingly widespread distribution of transmission lines, a corresponding technical solution to address line galloping is needed. Summary of the Invention

[0005] This invention provides a method for manufacturing a disruptor to solve the problems of inconvenient installation and insufficient anti-galloping capability of existing transmission line anti-galloping devices.

[0006] This invention provides a method for manufacturing a spoiler, comprising: feeding materials for making a polyvinyl chloride layer and an anti-electrostatic layer into an extrusion assembly to obtain a composite extruded material;

[0007] The composite extruded material is embedded and fixed in the groove of the combined molding die, and extends sequentially from the first end to the last end of the combined molding die;

[0008] Cut off the composite extruded material located at the end of the combined molding die, and place the combined molding die in a cooling tank;

[0009] The cooled combined molding die is removed from the cooling tank, and the composite extruded material located on the combined molding die is separated from the combined molding die to obtain a spoiler;

[0010] The spoiler includes:

[0011] The spoiler body includes a polyvinyl chloride (PVC) layer and an electrical tracking resistant layer wrapped around the outer surface of the PVC layer. The PVC layer has a hollow structure. Along the length of the spoiler body, the spoiler body includes a first gripping section, a support section, an anti-galling section, and a second gripping section connected in sequence. The first gripping section, the support section, and the second gripping section are all spiral-shaped, while the anti-galling section is straight. The spiral radius of the support section is larger than the spiral radii of the first gripping section and the second gripping section. A spiral guide vane is provided on the inner wall of the PVC layer corresponding to the support section.

[0012] According to a method for manufacturing a spoiler provided by the present invention, the polyvinyl chloride layer is made of polyvinyl chloride and benzotriazole.

[0013] According to a method for manufacturing a disruptor provided by the present invention, the materials for manufacturing the tracking resistant layer include polyvinyl chloride, carbon black masterbatch, and silicone powder.

[0014] According to a method for manufacturing a spoiler provided by the present invention, the step of feeding materials for making a polyvinyl chloride layer and an anti-tracking layer into an extrusion assembly to obtain a composite extruded material includes:

[0015] The material for making the polyvinyl chloride layer is fed into the first hopper and enters the first extruder through the first hopper; the material for making the electrical tracking resistant layer is fed into the second hopper and enters the second extruder through the second hopper.

[0016] The material extruded from the first extruder enters the first inlet of the co-molding machine, and the material extruded from the second extruder enters the second inlet of the co-molding machine, so that the composite extruded material is obtained through the outlet of the co-molding machine.

[0017] According to a method for manufacturing a spoiler provided by the present invention, the operating temperature of the first extruder and the second extruder is 140~150℃.

[0018] According to a method for manufacturing a spoiler provided by the present invention, the operating temperature of the common mode machine is 120~160℃.

[0019] According to a method for manufacturing a spoiler provided by the present invention, the inner wall surface of the die of the common mold machine is provided with a protrusion extending spirally along the length direction of the die, so that the outer surface of the anti-electrostatic layer is provided with a spiral groove extending spirally along the length direction of the spoiler body.

[0020] According to a method for manufacturing a spoiler provided by the present invention, the combined molding mold includes a first mold segment, a second mold segment, a third mold segment, a fourth mold segment, a fifth mold segment, and a sixth mold segment connected in sequence. The first mold segment is used to form a first gripping segment, the second mold segment is used to form the support segment, the third mold segment, the fourth mold segment, and the fifth mold segment are used to form the anti-flickering segment, and the sixth mold segment is used to form the second gripping segment.

[0021] According to a method for manufacturing a spoiler provided by the present invention, the first module, the second module, the third module, the fourth module, the fifth module, and the sixth module are arranged separately.

[0022] According to a method for manufacturing a spoiler provided by the present invention, the step of placing the combined molding die in a cooling tank includes:

[0023] Immerse the combined molding mold in a first cooling liquid at 60-70°C for 2-3 minutes;

[0024] Transfer the assembled molding mold to a second cooling liquid at 5-10°C for 3-5 minutes;

[0025] The first coolant is an ethanol-water solution containing 0.1%-0.3% release agent, and the second coolant is pure water.

[0026] The method for manufacturing the disruptor provided by this invention can effectively reduce the galloping of conductors caused by wind in high-voltage transmission lines, reduce the risk of collision between conductors, and improve the safety and stability of the line. In addition, the lightweight PVC hollow structure is easy to install and has low cost, which helps to reduce the cost of transmission line projects, thus facilitating large-scale promotion and application. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of the turbulence disruptor provided by the present invention.

[0029] Figure 2 This is a cross-sectional view of the spoiler provided by the present invention.

[0030] Figure 3 This is a manufacturing process diagram of the spoiler provided by the present invention.

[0031] Figure 4 This is a schematic diagram of the structure of the combined molding die provided by the present invention.

[0032] Figure 5 This is a schematic diagram of the common mold machine provided by the present invention.

[0033] Figure 6 This is a flowchart of the method for manufacturing the spoiler provided by the present invention.

[0034] Figure label:

[0035] 1. Spoiler body; 11. Polyvinyl chloride layer; 12. Tracking resistant layer; 13. First gripping section; 14. Support section; 15. Anti-galling section; 16. Second gripping section; 2. Extruder; 21. First hopper; 22. First extruder; 23. Second hopper; 24. Second extruder; 3. Composite extrusion material; 4. Combination molding die; 41. First die section; 42. Second die section; 43. Third die section; 44. Fourth die section; 45. Fifth die section; 46. Sixth die section; 47. Groove; 5. Cooling tank; 6. Common molding machine; 61. Core mold; 62. Die; 63. Flow channel; 64. First inlet; 65. Second inlet; 66. Diverter. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0037] like Figure 1 and Figure 2 As shown, the spoiler of this embodiment includes a spoiler body 1. The spoiler body 1 includes a polyvinyl chloride (PVC) layer 11 and an electrical tracking resistant layer 12 wrapped around the outer surface of the PVC layer 11. The PVC layer 11 has a hollow structure. Along the length of the spoiler body 1, the spoiler body 1 includes a first gripping section 13, a support section 14, an anti-galling section 15, and a second gripping section 16 connected in sequence. The first gripping section 13, the support section 14, and the second gripping section 16 are all helical, while the anti-galling section 15 is linear. The helical radius of the support section 14 is greater than the helical radius of the first gripping section 13 and the second gripping section 16.

[0038] It should be noted that the PVC layer 11 has a hollow structure, which reduces weight and improves overall flexibility and bending resistance. The tracking-resistant layer 12 is wrapped around the outer surface of the PVC layer 11 and has extremely high tracking resistance, which can effectively prevent surface damage caused by electric arc or corona discharge and extend the service life of the spoiler.

[0039] Understandably, the spoiler body 1 is divided into four main parts along its length: a first gripping section 13, a support section 14, an anti-galling section 15, and a second gripping section 16. The first gripping section 13 is located at one end of the spoiler and is spiral-shaped, facilitating gripping and securing during installation while providing some elasticity to accommodate wires of different diameters. The support section 14 connects to the first gripping section 13 and is also spiral-shaped, but with a larger spiral radius, providing more stable support while maintaining good flexibility and adaptability. The anti-galling section 15 is located after the support section 14 and is straight. To reduce wind resistance and galling, especially in high-wind-speed environments, it effectively stabilizes the spoiler's position and prevents excessive swaying due to wind force. The second gripping section 16 is similar to the first gripping section 13, located at the other end of the spoiler, and also features a spiral design for easy gripping and securing during installation.

[0040] In other words, the gripping section is used to grip the cable, and the gripping section can consist of several pitches (encircling and hugging the cable 360°), firmly fixing the spoiler to the cable. The support section 14 is used to support the anti-galling section 15 and prevent it from swinging. The anti-galling section 15 is used to disrupt the aerodynamic movement of the cable. The anti-galling section 15 can continuously change the dynamic shape of the cable under wind blowing, thereby preventing the cable from galloping.

[0041] Thus, the turbulence device of this invention can effectively reduce the galloping of conductors caused by wind in high-voltage transmission lines, reduce the risk of collision between conductors, and improve the safety and stability of the line. In addition, the lightweight PVC hollow structure is easy to install and has low cost, which helps to reduce the cost of transmission line projects, thereby facilitating large-scale promotion and application.

[0042] It is particularly important to note that the inner wall of the PVC layer 11 corresponding to the support section 14 is provided with spiral guide vanes. When wind impacts the inclined surface of the spiral guide vanes, it will move along the spiral trajectory of the spiral guide vanes according to the Coanda effect, converting the straight wind energy into vortex kinetic energy. Furthermore, the resulting reverse rotating vortex will interfere with and cancel out the straight wind energy in the anti-street section 15, achieving the effect of "using kinetic energy to control kinetic energy".

[0043] In practical applications, the outer surface of the anti-tracking layer 12 is provided with a spiral groove extending helically along the length of the spoiler body 1. The spiral groove extends helically along the length of the spoiler body 1, and its shape and size can be adjusted according to actual application requirements. For example, parameters such as the depth, width, and pitch of the spiral groove can affect the overall performance of the spoiler.

[0044] It should be noted that the spoiler surface is decorated with spiral grooves, designed to effectively reduce wind resistance. When a spoiler with these spiral grooves is wrapped around a conductor, it can further disrupt the regularity of airflow on the conductor surface, thereby reducing the shedding of periodic vortices and achieving a better turbulence effect.

[0045] In an optional embodiment, the polyvinyl chloride layer 11 is made of polyvinyl chloride and benzotriazole. The tracking-resistant layer 12 is made of polyvinyl chloride, carbon black masterbatch, and silicone powder.

[0046] The polyvinyl chloride (PVC) layer 11 serves as the main structural component of the spoiler body 1, and its primary material is polyvinyl chloride (PVC). PVC is a widely used thermoplastic with excellent insulation, chemical resistance, and mechanical strength. In the fabrication of the spoiler, the PVC layer 11 provides stable structural support and insulation protection. Furthermore, benzotriazole is added to the PVC layer 11 to extend its lifespan under outdoor sunlight.

[0047] Understandably, the materials used to manufacture the tracking-resistant layer 12 include polyvinyl chloride (PVC), carbon black masterbatch, and silicone powder, in addition to PVC. PVC, as the base material of the tracking-resistant layer 12, provides excellent insulation and mechanical strength. Carbon black masterbatch is a granular material containing a high concentration of carbon black, used to improve the tracking resistance of PVC. Carbon black can absorb and dissipate the energy generated by electric arcs or corona discharges, thereby preventing the formation of conductive channels on the material surface and improving the material's tracking resistance level. Silicone powder is an organosilicon compound used to improve the processing performance and weather resistance of PVC. It increases the material's flexibility, reduces the surface friction coefficient, and enhances its anti-aging properties, ensuring the tracking-resistant layer 12 maintains stable performance during long-term use. Thus, the spoiler possesses UV resistance and wind erosion resistance.

[0048] like Figure 3 and Figure 6 As shown, the method for manufacturing a spoiler according to an embodiment of the present invention includes:

[0049] S100, the materials for making the polyvinyl chloride layer 11 and the electrical tracking resistant layer 12 are respectively fed into the extrusion assembly to obtain the composite extruded material 3.

[0050] S200, the composite extruded material 3 is embedded and fixed in the groove 47 of the combined molding die 4, and extends sequentially from the first end to the last end of the combined molding die 4.

[0051] S300, cut off the composite extruded material 3 located at the end of the combined molding die 4, and place the combined molding die 4 in the cooling tank 5.

[0052] S400, the cooled combined molding die 4 is removed from the cooling tank 5, and the composite extruded material 3 located on the combined molding die 4 is separated from the combined molding die 4 to obtain the spoiler.

[0053] Specifically, the extrusion assembly melts and mixes the materials used to make the polyvinyl chloride layer 11 and the anti-electrostatic layer 12 under high temperature and pressure, ultimately forming a uniform composite extruded material 3. Thus, a composite extruded material 3 with stable performance and a uniform structure can be obtained through the extruder 2.

[0054] The composite extruded material 3 is embedded and fixed within the groove 47 of the molding die 4, which has a specific shape and structure for shaping the spoiler. The composite extruded material 3 is embedded starting from the first end of the molding die 4 and extends along the groove 47 to the end, ensuring a consistent shape and size throughout the spoiler. Assuming the molding die 4 is elongated, it has a groove 47 that matches the spoiler's shape. The operator places one end of the composite extruded material 3 into the first end of the groove 47 and then slowly pushes or pulls it along the groove 47 to the end. During the embedding process, it is necessary to ensure a tight fit between the composite extruded material 3 and the groove 47, avoiding air bubbles or gaps.

[0055] After the composite extruded material 3 is fully embedded in the molding die 4, use scissors or a cutting tool to cut off the end of the composite extruded material 3 at the end of the molding die 4. Then, place the molding die 4 in the cooling tank 5 to allow the composite extruded material 3 to cool and solidify in the cooling tank 5. The cooling tank 5 is usually filled with coolant or cooling water, which can quickly reduce the temperature of the composite extruded material 3 and allow it to solidify. When cutting the composite extruded material 3, it is necessary to ensure that the cut is clean and avoid affecting the shape of the spoiler. Then, place the molding die 4 into the cooling tank 5, ensuring that the coolant or cooling water in the cooling tank 5 can fully contact the composite extruded material 3. The cooling time depends on the thickness of the composite extruded material 3 and the temperature of the coolant, and usually takes several minutes to tens of minutes.

[0056] After the composite extruded material 3 cools and solidifies in the cooling tank 5, it is removed from the cooling tank 5. Then, the composite extruded material 3 located on the molding die 4 is separated from the molding die 4 to obtain the final spoiler product. The separation process requires care to avoid damaging the shape and structure of the spoiler. Specialized separation tools or manual operation can be used to separate the composite extruded material 3 from the molding die 4. If the adhesion between the composite extruded material 3 and the molding die 4 is strong, the molding die 4 can be appropriately heated before separation to reduce the adhesion. After separation, the spoiler undergoes visual inspection and performance testing to ensure it meets design requirements.

[0057] In other words, the cooled composite extruded material 3 and the combined molding die 4 are taken out from the cooling tank 5, one end is placed in the fixing hole, and the composite extruded material 3 is gently lifted with a prying knife at the other end and rotated with the rotation direction of the combined molding die 4, so that the composite extruded material 3 is separated from the combined molding die 4. The separated composite extruded material 3 is the formed spoiler, which can be processed into a finished spoiler product through subsequent processes.

[0058] The method for manufacturing the spoiler according to the present invention has the advantages of simple operation, high production efficiency and stable product quality, and is suitable for large-scale industrial production.

[0059] In an optional embodiment, the materials for making the polyvinyl chloride layer 11 and the tracking-resistant layer 12 are respectively fed into an extrusion assembly to obtain the composite extruded material 3, including:

[0060] The material for making the polyvinyl chloride layer 11 is fed into the first hopper 21 and enters the first extruder 22 through the first hopper 21. The material for making the anti-tracking layer 12 is fed into the second hopper 23 and enters the second extruder 24 through the second hopper 23.

[0061] The extrusion assembly includes an extruder 2 and a co-molding machine 6. The extruder 2 includes a first extruder 22 and a second extruder 24. The first extruder 22 is equipped with a first hopper 21, and the second extruder 24 is equipped with a second hopper 23. The co-molding machine 6 includes a die head, a core mold 61, a die 62, and a distributor 66. The die head is hollow and has a first inlet 64 and a second inlet 65. The first inlet 64 is located at one end of the die head, and the second inlet 65 is located on the side of the die head. The distributor 66 and part of the core mold 61 are located inside the die head. The die 62 is fitted onto the outer side of the other part of the core mold 61. A flow channel 63 is formed between the distributor 66 and the core mold 61, the die 62, and the die head. The first inlet 64 and the second inlet 65 are both connected to the flow channel 63.

[0062] Specifically, the material for making the polyvinyl chloride layer 11 is fed into the first hopper 21. The material for making the tracking-resistant layer 12 is fed into the second hopper 23. The material in the first hopper 21 enters the first extruder 22 through the feed inlet. In the first extruder 22, the material undergoes processes such as heating, melting, and extrusion to form the polyvinyl chloride layer 11 material. The material in the second hopper 23 enters the second extruder 24 through the feed inlet. In the second extruder 24, the material also undergoes processes such as heating, melting, and extrusion to form the tracking-resistant layer 12 material.

[0063] like Figure 1 and Figure 5 As shown, the material extruded by the first extruder 22 enters the first inlet 64 of the co-molding machine 6, and the material extruded by the second extruder 24 enters the second inlet 65 of the co-molding machine 6, so as to obtain a composite extruded material through the outlet of the co-molding machine 6.

[0064] Specifically, the first extruder 22 extrudes polyvinyl chloride (PVC) layer 11 material into the first inlet 64 of the co-molder 6, and the second extruder 24 extrudes electrical tracking resistant layer 12 material into the second inlet 65 of the co-molder 6. A distributor 66 is provided at the left end of the mandrel 61, which diverts the extruded PVC layer 11 material, allowing it to evenly enter the flow channel 63 between the die 62 and the mandrel 61, thus forming a hollow PVC layer 11. The electrical tracking resistant layer 12 material extruded through the second inlet 65 enters the flow channel 63 and coats the outer surface of the PVC layer 11 material, forming a composite extruded material 3 with both PVC layer 11 and electrical tracking resistant layer 12. In this way, the composite extrusion technology solves the problem of insufficient interfacial bonding between the PVC layer 11 and the electrical tracking resistant layer 12.

[0065] In an optional embodiment, the operating temperature of the first extruder 22 and the second extruder 24 is 140~150℃. The operating temperature of the co-molding machine 6 is 120~160℃. That is, the operating temperature of the core mold 61 and the die 62 is 120~160℃. For example, the operating temperatures of the first extruder 22 and the second extruder 24 are 140℃, 145℃, and 150℃; the operating temperatures of the core mold 61 and the die 62 are 120℃, 130℃, 140℃, 150℃, and 160℃.

[0066] It should be noted that setting the operating temperature of the first extruder 22 and the second extruder 24 to 140~150℃ ensures that the corresponding materials in the first extruder 22 and the second extruder 24 can be fully melted, while avoiding overheating that could lead to material degradation. Setting the operating temperature of the mandrel 61 and the die 62 to 120~160℃ ensures that the composite extruded material 3 maintains appropriate fluidity when passing through the mandrel 61 and the die 62, while avoiding excessively high temperatures that could cause the material to scorch or excessively low temperatures that could result in poor composite effects.

[0067] In an optional embodiment, the inner wall of the die 62 is provided with a protrusion extending spirally along the length of the die 62. The protrusion can be trapezoidal, circular, or other suitable shapes. The dimensions of the protrusion (such as height, width, and pitch) can be designed according to the specific requirements of the spiral groove. For example, the height of the protrusion can be set to 0.1 mm to 1 mm, and the width to 0.1 mm to 2 mm. When the trace resistance layer 12 material is extruded from the flow channel 63, it flows along the spiral trajectory of the protrusion, thereby forming a spiral groove pattern on the outer surface of the trace resistance layer 12.

[0068] Furthermore, after the composite extruded material 3 is separated from the molding die 4, a spiral guide vane is formed on the inner wall of the PVC layer 11 corresponding to the support section 14 on the deflector. For example, a spiral groove is provided on the outer surface of the core mold 61, the depth of the spiral groove is 1 / 3 to 1 / 2 of the wall thickness of the PVC layer 11, the helix angle is 55° to 65°, and the pitch is 15 to 20 mm. The spiral guide vane on the inner wall of the PVC layer 11 corresponding to the area outside the support section 14 can be removed.

[0069] In optional embodiments, such as Figure 4 As shown, the combined molding mold 4 includes a first mold segment 41, a second mold segment 42, a third mold segment 43, a fourth mold segment 44, a fifth mold segment 45, and a sixth mold segment 46 connected in sequence. The first mold segment 41 is used to form a first gripping section 13, the second mold segment 42 is used to form a support section 14, the third mold segment 43, the fourth mold segment 44, and the fifth mold segment 45 are used to form an anti-flickering section 15, and the sixth mold segment 46 is used to form a second gripping section 16.

[0070] It should be noted that the first module 41, the second module 42, the third module 43, the fourth module 44, the fifth module 45 and the sixth module 46 are all provided with corresponding grooves 47, thereby forming a spiral first gripping section 13, a support section 14 and a second gripping section 16, and a straight anti-swinging section 15.

[0071] In practical applications, the first module 41, the second module 42, the third module 43, the fourth module 44, the fifth module 45, and the sixth module 46 are arranged separately.

[0072] It should be noted that the modular design allows each mold segment to be manufactured independently, with different materials and manufacturing processes available for selection. During assembly, the individual mold segments are simply connected in a predetermined sequence, eliminating the need for complex machining and adjustments to the entire mold. If a mold segment becomes worn or damaged, that segment can be replaced individually without replacing the entire mold, thus reducing maintenance costs and downtime. It also facilitates regular inspection and maintenance of the mold, extending its service life.

[0073] Understandably, the modular design allows for flexible adjustment of the shape and size of each module to accommodate different specifications and types of conductors, as well as varying spoiler design requirements. By changing different module combinations, various types of spoilers can be produced to meet the needs of different application scenarios.

[0074] In an optional embodiment, the assembly molding mold 4 is placed within the cooling tank 5, including:

[0075] Immerse the combined molding die 4 in the coolant of the cooling tank 5 for 5-8 minutes to allow the composite extruded material 3 to set.

[0076] Specifically, the assembly mold 4 is slowly and smoothly lowered into the cooling tank 5 using a lifting device. Ensure the mold is completely submerged in the coolant to avoid uneven cooling. During the cooling process, the mold and coolant should be periodically monitored to ensure effective cooling. After the cooling time is complete, the assembly mold 4 is removed from the cooling tank 5 using the lifting device. The removal process should be smooth and rapid to avoid deformation or damage to the mold.

[0077] For example, the molding die 4 is immersed in a first cooling liquid at 60-70°C for 2-3 minutes; then transferred to a second cooling liquid at 5-10°C for 3-5 minutes; wherein the first cooling liquid is an ethanol-water solution containing 0.1%-0.3% release agent, and the second cooling liquid is pure water. The addition of the release agent ensures that the composite extruded material 3 located on the molding die 4 separates from the molding die 4.

[0078] In addition, the removed composite molding die 4 should be inspected to observe the shaping of the composite extruded material 3. If poor shaping or other problems are found, the cooling parameters or die design should be adjusted in a timely manner.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for manufacturing a spoiler, characterized in that, include: The materials for making the polyvinyl chloride layer and the anti-electric tracking layer are respectively fed into the extrusion assembly to obtain the composite extrusion; The composite extruded material is embedded and fixed in the groove of the combined molding die, and extends sequentially from the first end to the last end of the combined molding die; Cut off the composite extruded material located at the end of the combined molding die, and place the combined molding die in a cooling tank; The cooled combined molding die is removed from the cooling tank, and the composite extruded material located on the combined molding die is separated from the combined molding die to obtain a spoiler; The spoiler includes: The spoiler body includes a polyvinyl chloride (PVC) layer and an electrical tracking resistant layer wrapped around the outer surface of the PVC layer. The PVC layer has a hollow structure. Along the length of the spoiler body, the spoiler body includes a first gripping section, a support section, an anti-galling section, and a second gripping section connected in sequence. The first gripping section, the support section, and the second gripping section are all spiral-shaped, while the anti-galling section is straight. The spiral radius of the support section is larger than the spiral radii of the first gripping section and the second gripping section. A spiral guide vane is provided on the inner wall of the PVC layer corresponding to the support section. The combined molding die includes a first mold segment, a second mold segment, a third mold segment, a fourth mold segment, a fifth mold segment, and a sixth mold segment connected in sequence. The first mold segment is used to form the first gripping section, the second mold segment is used to form the support section, the third, fourth, and fifth mold segments are used to form the anti-flicker section, and the sixth mold segment is used to form the second gripping section. The first, second, third, fourth, fifth, and sixth mold segments are arranged separately. Each of the first, second, third, fourth, fifth, and sixth mold segments is provided with a corresponding groove, thereby forming the first gripping section, the support section, and the second gripping section in a spiral shape, and the anti-flicker section in a straight line shape.

2. The method for manufacturing the spoiler according to claim 1, characterized in that, The materials used to make the polyvinyl chloride layer include polyvinyl chloride and benzotriazole.

3. The method for manufacturing a spoiler according to claim 1, characterized in that, The materials used to manufacture the tracking-resistant layer include polyvinyl chloride, carbon black masterbatch, and silicone powder.

4. The method for manufacturing a spoiler according to claim 1, characterized in that, The process of feeding the materials for making the polyvinyl chloride layer and the electrical tracking resistant layer into an extrusion assembly to obtain a composite extruded material includes: The material for making the polyvinyl chloride layer is fed into the first hopper and enters the first extruder through the first hopper; the material for making the electrical tracking resistant layer is fed into the second hopper and enters the second extruder through the second hopper. The material extruded from the first extruder enters the first inlet of the co-molding machine, and the material extruded from the second extruder enters the second inlet of the co-molding machine, so that the composite extruded material is obtained through the outlet of the co-molding machine.

5. The method for manufacturing the spoiler according to claim 4, characterized in that, The operating temperature of the first extruder and the second extruder is 140~150℃.

6. The method for manufacturing a spoiler according to claim 4, characterized in that, The operating temperature of the common mold machine is 120~160℃.

7. The method for manufacturing a spoiler according to claim 4, characterized in that, The inner wall of the die of the common mold machine is provided with a protrusion that extends spirally along the length direction of the die, so that the outer surface of the anti-electric tracking layer is provided with a spiral groove that extends spirally along the length direction of the turbulence body.

8. The method for manufacturing a spoiler according to claim 1, characterized in that, Placing the assembled molding die in the cooling tank includes: Immerse the combined molding mold in a first cooling liquid at 60-70°C for 2-3 minutes; Transfer the assembled molding mold to a second cooling liquid at 5-10°C for 3-5 minutes; The first coolant is an ethanol-water solution containing 0.1%-0.3% release agent, and the second coolant is pure water.

Images