Cable insulation layer extrusion molding device and processing method thereof

Abstract

The cable insulation layer extrusion molding device comprises a rack, a double-wire screw extrusion molding unit is installed at the top end of the rack, and a chain wheel driving unit used for driving the double-wire screw extrusion molding unit to work is installed on the top wall of the rack; two symmetrical three-way extrusion molding heads are installed at the end, away from the chain wheel driving unit, of the double-line screw extrusion molding unit, right-angle discharging elbows are installed at the ends, close to each other, of the two three-way extrusion molding heads, and an active lead module is installed at the position, on one side of the three-way extrusion molding heads, of the top end of the rack. Insulating layers of two cables can be formed at the same time in the same period, the production efficiency can be greatly improved, only one cable can be produced each time in a traditional single-wire extrusion molding mode, the production speed can be doubled through a double-wire extrusion molding technology, the production period is shortened, and the waiting time of a production line is shortened.

Description

Technical Field

[0001] The invention relates to the technical field of cable processing, in particular to a cable insulation layer extrusion device and a processing method thereof. Background Art

[0002] The cable insulation layer extrusion device is a key equipment in the cable production process. Its main function is to evenly cover the insulation material on the surface of the cable conductor through the extrusion process to ensure the electrical insulation performance of the cable and prevent current leakage and cable short circuit. It not only provides electrical protection, but also enhances the mechanical properties of the cable, such as tensile strength and wear resistance, and improves the environmental resistance of the cable. The structure of the cable insulation layer extrusion device includes key components such as extruder, mold, cooling system, traction device and cutting device. The extruder is responsible for heating the insulating raw material and pushing it through the screw to extrude it. The mold forms the material into an insulation layer according to the cable specifications and ensures that it evenly covers the conductor surface. The cooling system is used to quickly cool and solidify the extruded cable to prevent deformation. The traction device is responsible for pulling the cable to ensure that the insulation layer is evenly and stably attached to the conductor. The cutting device is responsible for cutting the extruded cable into the required length. Through high-temperature and high-pressure extrusion and cooling solidification, a stable bond is formed between the insulation layer of the cable and the conductor, ensuring the stability of the electrical and mechanical properties of the cable; as disclosed in the authorization announcement number CN217047410U, a cable insulation layer rapid extrusion device includes a melting box, a chamber is opened on the surface of the melting box, and a heating rod is circumferentially arranged inside the chamber, a melting bin is arranged inside the melting box, a motor is fixedly installed on the surface of one side of the melting box, and the output end of the motor extends to the inside of the melting bin through a coupling and a spiral blade is fixedly installed, a molding device is fixedly installed on the other side of the melting box, and a cooling box is provided on the side of the molding device away from the melting box, a crushing bin is fixedly installed on one side of the top surface of the melting box, and a crushing motor is provided, and the output end of the crushing motor drives the crushing rod to rotate. , so that the rotation of the crushing rod drives several crushing blades to rotate continuously, which can crush the raw materials and facilitate the melting of the crushed raw materials. However, the above technical solution still adopts the extrusion structure of the single-line insulation layer during use. The single-line extrusion structure can only produce a single product in the same production cycle, and other production lines cannot share equipment resources. When producing large-scale cables, the production efficiency of the single-line extrusion structure will be insufficient, and in the production process, it is necessary to set a separate traction setting to control the cable movement, and the speed of the traction device needs to be consistent with the production speed of the extrusion structure to ensure the continuity of the cable output. If the speed of the traction device cannot accurately match the working speed of the extruder, it will cause unstable tension or uneven speed of the cable line, and even cause the insulation layer to break without successful coating. Summary of the invention

[0003] The object of the present invention is to provide a cable insulation layer extrusion device and a processing method thereof, wherein a twin-screw extrusion unit driven by a sprocket drive unit is arranged to form two cable insulation layers in the same time period, the cable enters a three-way extrusion head through an active lead module, and contacts with the molten insulation layer material in the three-way extrusion head, the cable coated with the insulation layer is led out from a right-angle discharge elbow, and is sent into a water-cooled shell and an arc-shaped lead tube by a pulley routing module for cooling and forming, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a cable insulation layer extrusion device, comprising: A frame, a twin-screw extrusion unit is installed on the top of the frame, a sprocket drive unit for driving the twin-screw extrusion unit is installed on the top wall of the frame, two symmetrical three-way extrusion heads are installed on one end of the twin-screw extrusion unit away from the sprocket drive unit, and right-angle discharge elbows are installed on the ends of the two three-way extrusion heads that are close to each other, an active lead module is installed on the top of the frame on one side of the three-way extrusion head, and the active lead module is used to feed the cable into the three-way extrusion head and the right-angle discharge elbow, and a counter-blowing module is installed on the top of the frame below the right-angle discharge elbow; A water-cooled shell is arranged on one side of the frame, an arc-shaped lead tube with a plurality of through holes is installed inside the water-cooled shell, a pulley wiring module for pulling the cable out of the right-angle discharge elbow is installed at one end inside the arc-shaped lead tube, the pulley wiring module and the sprocket drive unit maintain power connection, a multi-point liquid inlet structure for introducing coolant is installed inside the water-cooled shell, a PLC control panel is installed on one side of the frame surface, and the output end of the PLC control panel is electrically connected to the input end of the sprocket drive unit, the double-screw extrusion unit, and the active lead module respectively.

[0005] Preferably, the twin-screw extrusion unit includes a material rack mounted on the top of a frame, a dual-zone material storage box installed inside the material rack, and a screw extrusion module at two openings at the bottom of the dual-zone material storage box, the bottom end of the screw extrusion module is fixedly connected to the top of the frame, and the twin-screw extrusion unit also includes a heating module installed on the outer peripheral surface of the screw extrusion module.

[0006] Preferably, the screw extrusion module includes a melting bin fixed on the top of the frame and a screw rotatably installed inside the melting bin, one end of the screw passes through the outside of the melting bin and is interconnected with a sprocket drive unit, the three-way extrusion head is installed at the outlet end of the melting bin, the heating module includes an insulation shell fixed on the outer peripheral surface of the melting bin and an electric heating wire installed inside the insulation shell, and the input end of the electric heating wire is electrically connected to the output end of the PLC control panel.

[0007] Preferably, the sprocket drive unit includes a stepper motor mounted on the top wall of the frame and a sprocket transmission structure mounted on the output shaft of the stepper motor for driving the two screw rods to work synchronously.

[0008] Preferably, the active lead module includes a hollow wiring shell fixed on the top of the frame, a straight wire pipe installed on the outer wall of one side of the hollow wiring shell, and a wire feeding wheel rotatably installed at one end of the hollow wiring shell, a servo motor is installed on the back of the hollow wiring shell, the output shaft of the servo motor extends to the interior of the hollow wiring shell and is fixed with a wire feeding wheel 2, the end of the three-way extrusion head away from the right-angle discharge elbow is interconnected with the outer wall of one side of the hollow wiring shell, and the left and right inner walls of the hollow wiring shell are provided with wire holes concentric with the straight wire pipe and the three-way extrusion head.

[0009] Preferably, the wire feeding wheel 1 and the wire feeding wheel 2 are made of alloy steel.

[0010] Preferably, the pulley routing module includes a wire feeding roller rotatably mounted at one end inside the arc-shaped wire guide, a driven shaft rotatably mounted on one side of the frame surface, and a bevel gear transmission structure mounted on one end of the driven shaft close to the stepper motor. The output shaft of the stepper motor and the relative ends of the driven shaft maintain power connection through the bevel gear transmission structure, and the other end of the driven shaft is installed with a belt transmission structure for driving the wire feeding roller to rotate.

[0011] Preferably, a limiting roller is rotatably installed on the other side of the interior of the arc-shaped lead tube.

[0012] Preferably, the multi-point liquid inlet structure includes a Y-shaped liquid inlet pipe installed inside the water-cooled shell, a plurality of diverter pipes installed at equal intervals at the top of the Y-shaped liquid inlet pipe, and an electric switch valve installed at one end of the Y-shaped liquid inlet pipe, one end of the diverter pipe extends upward and enters the interior of the arc-shaped lead tube.

[0013] The present invention also provides a cable insulation layer extrusion processing method, such as the cable insulation layer extrusion device described above, comprising the following steps: S101: The PLC control panel is responsible for monitoring and adjusting the operating status of the sprocket drive unit to ensure that it works at the set speed and torque. Driven by the sprocket drive unit, the twin-screw extruder unit starts to work. This unit is responsible for heating, melting, plasticizing and extruding the insulating material to ensure that the material is extruded in the best condition. The design of the twin-screw allows the two cables to obtain a uniform insulation layer at the same time; S102: After the twin-screw extruder extrudes the molten insulating material, the active lead module is responsible for guiding the cable conductor into the three-way extrusion head so that the cable and the molten insulating material in the three-way extrusion head meet and contact each other. The active lead module ensures that the cable conductor is fed into the three-way extrusion head at a stable speed; S103: After passing through the three-way extruder, the cable is led downward through the right-angle discharge elbow. The structural design of the right-angle discharge elbow enables the cable to turn smoothly and enter the subsequent cooling process; S104: After the cable passes through the right-angle discharge elbow, it moves along the upper surface of the arc-shaped lead tube through the pulley routing module. The pulley routing module ensures that the cable maintains stable traction during the cooling process through a series of pulleys and a transmission system. At this time, the two cables maintain a consistent speed throughout the cooling process to avoid quality problems caused by speed differences. The cables in the water-cooled shell and the arc-shaped lead tube are in a cooling state, that is, the coolant in the water-cooled shell and the arc-shaped lead tube quickly reduces the cable temperature, so that the molten insulating material quickly solidifies on the cable surface to form a uniform insulating layer.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the cable insulation layer extrusion device and its processing method realize efficient, stable and precise operation in the cable production process through the close cooperation of the sprocket drive unit, the twin-screw extrusion unit, the active lead module, the three-way extrusion head, the right-angle discharge elbow, the pulley routing module, the water-cooling shell, the arc lead tube and the PLC control panel, wherein the twin-screw extrusion unit is used to simultaneously form the insulation layers of two cables in the same cycle, which can greatly improve the production efficiency. The traditional single-line extrusion method can only produce one cable at a time, while the twin-line extrusion technology can double the production speed, reducing the production cycle and the waiting time of the production line. Especially in the case of large demand and mass production, the twin-line extrusion unit can significantly increase the output, thereby better meeting the market demand and improving the overall efficiency of the production line. Compared with the traditional single-line extrusion production line, the twin-line extrusion unit completes the insulation layer molding of two cables in the same production line, reducing the number of required equipment. The cable is guided by the active lead module and enters the three-way extrusion head to contact with the molten insulation material. This precise guidance and contact method can ensure that the molten material is evenly coated on the conductor surface, avoiding problems such as uneven insulation or shedding that may occur in the traditional production process; The solution of using a pulley routing module and a sprocket drive unit is adopted. That is, the pulley routing module and the twin-screw extrusion unit share the power of the sprocket drive unit. The cable is smoothly fed into the water-cooled casing for cooling and molding through the guidance of this system. During this process, the pulley routing module effectively reduces friction and avoids unnecessary damage to the cable surface and insulation layer. In addition, the use of the water-cooled casing can cool the cable to the appropriate hardness in a shorter time, ensuring the quality of the insulation layer and the stability of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 The three-dimensional structure of the present invention is shown in FIG. Figure 1 ; Figure 3 The three-dimensional structure of the present invention is shown in FIG. Figure 2 ; Figure 4 The three-dimensional structure of the present invention is shown in FIG. Figure 3 ; Figure 5 It is a schematic diagram of the three-dimensional structure of the active lead module of the second embodiment of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the second embodiment of the present invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the water-cooling housing according to the third embodiment of the present invention; Figure 8 This is a schematic diagram of the three-dimensional cross-sectional structure of the water-cooling housing according to the third embodiment of the present invention.

[0016] In the figure: 1, frame; 2, material rack; 3, dual-zone storage box; 4, screw extrusion module; 5, heating module; 6, sprocket drive unit; 601, stepper motor; 602, sprocket transmission structure; 7, three-way extrusion head; 8, active lead module; 801, hollow wiring shell; 802, servo motor; 803, inlet straight pipe; 804, wire feeding wheel 1; 805, wire feeding wheel 2; 9, right-angle discharge elbow; 1 0. Opposite blast module; 11. Water-cooled shell; 12. Arc-shaped lead-in tube; 1201. Limiting roller; 13. Pulley routing module; 1301. Wire feeding roller; 1302. Belt drive structure; 1303. Driven shaft; 1304. Bevel gear drive structure; 14. Multi-point liquid inlet structure; 1401. Y-shaped liquid inlet pipe; 1402. Diverter pipe; 1403. Electric switch valve; 15. PLC control panel. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Embodiment 1, by Figures 1 to 4The present invention comprises a frame 1, a twin-screw extrusion unit is installed at the top of the frame 1, a sprocket drive unit 6 for driving the twin-screw extrusion unit is installed on the top wall of the frame 1, two symmetrical three-way extrusion heads 7 are installed at one end of the twin-screw extrusion unit away from the sprocket drive unit 6, and right-angle discharge elbows 9 are installed at the ends of the two three-way extrusion heads 7 that are close to each other, an active lead module 8 is installed at the top of the frame 1 on one side of the three-way extrusion head 7, and the active lead module 8 is used to feed the cable into the three-way extrusion head 7 and the right-angle discharge elbow 9, and a counter-blowing module 10 is installed at the top of the frame 1 below the right-angle discharge elbow 9; A water-cooled shell 11 is arranged on one side of the frame 1. An arc-shaped lead tube 12 with a plurality of through holes is installed inside the water-cooled shell 11. A pulley wiring module 13 for pulling the cable out of the right-angle discharge elbow 9 is installed at one end inside the arc-shaped lead tube 12. The pulley wiring module 13 and the sprocket drive unit 6 maintain power connection. A multi-point liquid inlet structure 14 for introducing coolant is installed inside the water-cooled shell 11. A PLC control panel 15 is installed on one side of the surface of the frame 1. The output end of the PLC control panel 15 is electrically connected to the input end of the sprocket drive unit 6, the double-screw extrusion unit, and the active lead module 8 respectively; The twin-line screw extrusion unit includes a material rack 2 mounted on the top of a frame 1, a dual-zone material storage box 3 installed inside the material rack 2, and a screw extrusion module 4 at two opening positions at the bottom end of the dual-zone material storage box 3, the bottom end of the screw extrusion module 4 is fixedly connected to the top of the frame 1, the twin-line screw extrusion unit also includes a heating module 5 installed on the outer peripheral surface of the screw extrusion module 4, the screw extrusion module 4 includes a melting bin fixed on the top of the frame 1 and a screw rotatably installed inside the melting bin, one end of the screw passes through the outside of the melting bin and is interconnected with a sprocket drive unit 6, a three-way extrusion head 7 is installed at the outlet end of the melting bin, the heating module 5 includes a heat preservation shell fixed on the outer peripheral surface of the melting bin and an electric heating wire installed inside the heat preservation shell, and the input end of the electric heating wire is electrically connected to the output end of the PLC control panel 15; The staff puts a sufficient amount of plastic raw materials into the dual-zone storage box 3, and the dual-zone storage box 3 respectively feeds the plastic raw materials into the two screw extrusion modules 4, and the electric heating wire in the heating module 5 heats the screw extrusion module 4 and the plastic raw materials. The insulation shell on the outer peripheral surface of the screw extrusion module 4 covers the electric heating wire, and then the screw extrusion module 4 pushes the plastic raw materials to extrude the plastic raw materials toward the three-way extrusion head 7 through the screw, so that the insulating layer material in the high-temperature molten state enters the three-way extrusion head 7, and the three-way extrusion head 7 and the right-angle discharge elbow 9 ensure that the extruded molten material is evenly covered on each cable and reaches the required insulation thickness; The sprocket drive unit 6 includes a stepper motor 601 installed on the top wall of the frame 1 and a sprocket transmission structure 602 installed on the output shaft of the stepper motor 601 for driving two screws to work synchronously. When the sprocket drive unit 6 drives the two screw extrusion modules 4 to work, the output shaft of the stepper motor 601 uses the sprocket transmission structure 602 to drive the screws in the two screw extrusion modules 4 to rotate together, so as to ensure that the two screws run synchronously at the same time, keep the production speeds of the two screws consistent, and avoid production instability problems caused by power asynchrony.

[0019] A cable insulation layer extrusion processing method of this embodiment, such as the cable insulation layer extrusion device mentioned above, comprises the following steps: S101: The PLC control panel 15 is responsible for monitoring and adjusting the operating state of the sprocket drive unit 6 to ensure that it works at the set speed and torque. Driven by the sprocket drive unit 6, the twin-screw extrusion unit starts to work. The unit is responsible for heating, melting, plasticizing and extruding the insulating material to ensure that the material is extruded in the best state. The design of the twin-screw enables two cables to obtain a uniform insulation layer at the same time; S102: After the twin-screw extruder extrudes the molten insulating material, the active lead module 8 is responsible for guiding the cable conductor into the three-way extrusion head 7 so that the cable and the molten insulating material in the three-way extrusion head 7 meet and contact each other. The active lead module 8 ensures that the cable conductor is fed into the three-way extrusion head 7 at a stable speed; S103: After passing through the three-way extrusion head 7, the cable is led downward through the right-angle discharge elbow 9. The structural design of the right-angle discharge elbow 9 enables the cable to turn smoothly and enter the subsequent cooling process; S104: After the cable passes through the right-angle discharge elbow 9, it moves along the upper surface of the arc-shaped lead tube 12 through the pulley routing module 13. The pulley routing module 13 ensures that the cable maintains stable traction during the cooling process through a series of pulleys and a transmission system. At this time, the two cables maintain a consistent speed during the entire cooling process to avoid quality problems caused by speed differences. The cables located in the water-cooled shell 11 and the arc-shaped lead tube 12 are in a cooling state, that is, the coolant in the water-cooled shell 11 and the arc-shaped lead tube 12 quickly reduces the cable temperature, so that the molten insulating material quickly solidifies on the cable surface to form a uniform insulating layer.

[0020] Embodiment 2, based on embodiment 1, Figure 5 and Figure 6It is given that the active lead module 8 includes a hollow wiring shell 801 fixed on the top of the frame 1, an incoming wire straight pipe 803 installed on the outer wall of one side of the hollow wiring shell 801, and a wire feeding wheel 804 rotatably installed at one end of the hollow wiring shell 801. A servo motor 802 is installed on the back of the hollow wiring shell 801, and the output shaft of the servo motor 802 extends to the inside of the hollow wiring shell 801 and is fixed with a wire feeding wheel 805. One end of the three-way extrusion head 7 away from the right-angle discharge elbow 9 is connected to the outer wall of one side of the hollow wiring shell 801. The left and right inner walls of the hollow wiring shell 801 are provided with wire holes that are concentric with the incoming wire straight pipe 803 and the three-way extrusion head 7. The wire feeding wheel 804 and the wire feeding wheel 805 are made of alloy steel components. During the wire feeding process of the active lead module 8, the cable is introduced from the inlet straight pipe 803 into the hollow wiring shell 801, and the cable passes between the wire feeding wheel 1 804 and the wire feeding wheel 2 805 and then into the three-way extrusion head 7. During this process, the staff turns on the servo motor 802 through the PLC control panel 15 to work, and the servo motor 802 drives the wire feeding wheel 2 805 to rotate, and the friction force of the wire feeding wheel 2 805 and the wire feeding wheel 1 804 on the cable is used to ensure that the cable enters the three-way extrusion head 7 in a precise path, so that the cable will not be offset or blocked during the extrusion process, so as to avoid uneven insulation layer caused by unstable conductor movement; The pulley wiring module 13 includes a wire feeding roller 1301 rotatably mounted at one end of the arc-shaped wire guide 12, a driven shaft 1303 rotatably mounted at one side of the surface of the frame 1, and a bevel gear transmission structure 1304 mounted at one end of the driven shaft 1303 close to the stepping motor 601. The output shaft of the stepping motor 601 and the opposite ends of the driven shaft 1303 are connected by power through the bevel gear transmission structure 1304. The other end of the driven shaft 1303 is installed with a belt transmission structure 1302 for driving the wire feeding roller 1301 to rotate. The cable with an insulation layer led out from the right-angle discharge elbow 9 passes through the lower surface of the wire feeding roller 1301. At this time, the cable is pressed by the wire feeding roller 1301 and the arc-shaped lead-in tube 12. In this process, the output shaft of the stepper motor 601 drives the wire feeding roller 1301 to rotate through the bevel gear transmission structure 1304, the driven shaft 1303 and the belt transmission structure 1302, so that the wire feeding roller 1301 forces the cable to move along the upper surface of the arc-shaped lead-in tube 12 through friction, ensuring that the cable maintains a consistent speed before entering the water-cooling housing 11 and the arc-shaped lead-in tube 12; The through holes on the surface of the arc lead bladder 12 allow the coolant in the water-cooled shell 11 to pass through, ensuring that the water-cooled shell 11 and the arc lead bladder 12 are in a connected state. A limiting roller 1201 is rotatably installed on the other side of the arc lead bladder 12. The limiting roller 1201 is used to limit the cable inside the arc lead bladder 12 to avoid uneven cooling caused by floating of the cable.

[0021] Embodiment 3, based on embodiment 2, Figure 7 and Figure 8 The staff can also control the fan in the opposite blowing module 10 to work, and the wind generated by the fan blows toward the cable coated with the insulation layer through the blowing nozzle, so that the cable led out from the right-angle discharge elbow 9 is initially cooled; The multi-point liquid inlet structure 14 includes a Y-shaped liquid inlet pipe 1401 installed inside the water-cooled shell 11, a plurality of shunt pipes 1402 installed at equal intervals at the top of the Y-shaped liquid inlet pipe 1401, and an electric switch valve 1403 installed at one end of the Y-shaped liquid inlet pipe 1401. One end of the shunt pipe 1402 extends upward and enters the interior of the arc-shaped lead tube 12. The staff directly connects the electric switch valve 1403 to the external cooling supply end, and the cold water is sent to the arc-shaped lead tube 12 through the electric switch valve 1403, the Y-shaped liquid inlet pipe 1401 and the shunt pipe 1402. The cold water flows downward through the arc-shaped lead tube 12 and merges into the water-cooled shell 11, and the cable temperature is quickly reduced to help the molten insulating material to quickly solidify on the cable surface to form a uniform and dense insulating layer.

[0022] When the embodiment of the present application is in use, the staff is first responsible for monitoring and adjusting the operating status of the sprocket drive unit 6 through the PLC control panel 15 to ensure that it works at the set speed and torque. The stability and accuracy of the sprocket drive unit 6 lay the foundation for the coordinated operation of subsequent equipment. Driven by the sprocket drive unit 6, the twin-screw extrusion unit starts to work. This unit is responsible for heating, melting, plasticizing and extruding the insulating material to ensure that the material is extruded in the best state. The design of the twin-screw enables the two cables to obtain a uniform insulation layer at the same time, ensuring production efficiency and product quality. After the extrusion unit extrude the molten insulating material, the active lead module 8 is responsible for guiding the cable conductor into the three-way extrusion head 7 so that the cable merges and contacts with the molten insulating material in the three-way extrusion head 7. The active lead module 8 ensures that the cable conductor is fed into the three-way extrusion head 7 at a stable speed. After the cable conductor is fed into the three-way extrusion head 7 through the active lead module 8, it meets the molten insulating material here. The design of the three-way extrusion head 7 ensures that the molten material is evenly coated on the surface of the cable conductor to form an insulating layer. After passing through the three-way extrusion head 7, the cable is led downward through the right-angle discharge elbow 9. The structural design of the right-angle discharge elbow 9 The design enables the cable to turn smoothly and enter the subsequent cooling process, and ensures that the cable maintains good tension at the outlet to avoid cable damage caused by turning. After the cable passes through the right-angle discharge elbow 9, it moves along the upper surface of the arc-shaped lead tube 12 through the pulley routing module 13. The pulley routing module 13 ensures that the cable maintains stable traction during the cooling process through a series of pulleys and a transmission system. At this time, the two cables maintain a consistent speed during the entire cooling process to avoid quality problems caused by speed differences. The cables located in the water-cooled housing 11 and the arc-shaped lead tube 12 are in a cooling state, that is, water-cooled. The coolant in the outer shell 11 and the arc-shaped lead tube 12 quickly reduces the cable temperature, so that the molten insulating material quickly solidifies on the cable surface to form a uniform insulating layer. During the cooling process, the pulley routing module 13 and the arc-shaped lead tube 12 help the cable to maintain a stable path to avoid defects caused by uneven cooling. The design of the arc-shaped lead tube 12 ensures that the cable is not affected by external forces during the cooling process and maintains its shape and quality. After cooling, the insulating layer and cable become hard and have a certain strength. The staff can arrange a double winding device on the outlet side of the arc-shaped lead tube 12 to allow the finished cable to be output and wound up.

[0023] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cable insulation layer extrusion device, characterized in that: include: A frame (1), wherein a twin-screw extrusion unit is installed at the top of the frame (1), a sprocket drive unit (6) for driving the twin-screw extrusion unit is installed on the top wall of the frame (1), two symmetrical three-way extrusion heads (7) are installed at one end of the twin-screw extrusion unit away from the sprocket drive unit (6), and right-angle discharge elbows (9) are installed at the ends of the two three-way extrusion heads (7) that are close to each other, an active lead module (8) is installed at the top of the frame (1) on one side of the three-way extrusion head (7), and the active lead module (8) is used to feed the cable into the three-way extrusion head (7) and the right-angle discharge elbow (9), and a counter-blowing module (10) is installed at the top of the frame (1) below the right-angle discharge elbow (9); A water-cooled shell (11), the water-cooled shell (11) being arranged on one side of a frame (1), an arc-shaped lead tube (12) with a plurality of through holes being installed inside the water-cooled shell (11), a pulley wiring module (13) for pulling a cable out of a right-angle discharge elbow (9) being installed at one end inside the arc-shaped lead tube (12), the pulley wiring module (13) and a sprocket drive unit (6) being in power connection, a multi-point liquid inlet structure (14) for introducing a coolant being installed inside the water-cooled shell (11), a PLC control panel (15) being installed on one side of a surface of the frame (1), the output end of the PLC control panel (15) being electrically connected to the input end of the sprocket drive unit (6), the twin-screw extruder unit, and the active lead module (8) respectively.

2. A cable insulation layer extrusion device according to claim 1, characterized in that: The twin-screw extrusion unit comprises a material rack (2) mounted on the top of a frame (1), a dual-zone material storage box (3) installed inside the material rack (2), and a screw extrusion module (4) at two openings at the bottom of the dual-zone material storage box (3), the bottom end of the screw extrusion module (4) being fixedly connected to the top of the frame (1), and the twin-screw extrusion unit further comprises a heating module (5) installed on the outer peripheral surface of the screw extrusion module (4).

3. A cable insulation layer extrusion device according to claim 2, characterized in that: The screw extrusion module (4) comprises a melting chamber fixed on the top of the frame (1) and a screw rotatably installed inside the melting chamber, one end of the screw passes through the outside of the melting chamber and is interconnected with the sprocket drive unit (6), the three-way extrusion head (7) is installed at the outlet end of the melting chamber, and the heating module (5) comprises an insulation shell fixed on the outer peripheral surface of the melting chamber and an electric heating wire installed inside the insulation shell, and the input end of the electric heating wire is electrically connected to the output end of the PLC control panel (15).

4. A cable insulation layer extrusion device according to claim 3, characterized in that: The sprocket drive unit (6) comprises a stepper motor (601) mounted on the top wall of the frame (1) and a sprocket transmission structure (602) mounted on the output shaft of the stepper motor (601) and used for driving two screw rods to work synchronously.

5. The cable insulation layer extrusion device according to claim 3, characterized in that: The active lead module (8) comprises a hollow wiring shell (801) fixed to the top of the frame (1), a straight wire inlet pipe (803) installed on the outer wall of one side of the hollow wiring shell (801), and a first wire feeding wheel (804) rotatably installed at one end of the hollow wiring shell (801); a servo motor (802) is installed on the back of the hollow wiring shell (801); the output shaft of the servo motor (802) extends into the interior of the hollow wiring shell (801) and is fixed with a second wire feeding wheel (805); one end of the three-way extrusion head (7) away from the right-angle discharge elbow (9) is connected to the outer wall of one side of the hollow wiring shell (801); and wire holes that are concentric with the straight wire inlet pipe (803) and the three-way extrusion head (7) are provided on the left and right inner walls of the hollow wiring shell (801).

6. A cable insulation layer extrusion device according to claim 5, characterized in that: The wire feeding wheel 1 (804) and the wire feeding wheel 2 (805) are made of alloy steel.

7. A cable insulation layer extrusion device according to claim 4, characterized in that: The pulley wiring module (13) comprises a wire feeding roller (1301) rotatably mounted at one end inside the arc-shaped wire guide (12), a driven shaft (1303) rotatably mounted on one side of the surface of the frame (1), and a bevel gear transmission structure (1304) mounted on one end of the driven shaft (1303) close to the stepping motor (601), wherein the output shaft of the stepping motor (601) and the opposite ends of the driven shaft (1303) are connected in power via the bevel gear transmission structure (1304), and the other end of the driven shaft (1303) is mounted with a belt transmission structure (1302) for driving the wire feeding roller (1301) to rotate.

8. A cable insulation layer extrusion device according to claim 7, characterized in that: A limiting roller (1201) is rotatably mounted on the other side of the interior of the arc-shaped lead-in tube (12).

9. A cable insulation layer extrusion device according to claim 8, characterized in that: The multi-point liquid inlet structure (14) comprises a Y-shaped liquid inlet pipe (1401) installed inside the water-cooling housing (11), a plurality of shunt pipes (1402) installed at equal intervals at the top of the Y-shaped liquid inlet pipe (1401), and an electric switch valve (1403) installed at one end of the Y-shaped liquid inlet pipe (1401), wherein one end of the shunt pipe (1402) extends upward and enters the interior of the arc-shaped lead tube (12).

10. A cable insulation layer extrusion processing method, comprising the cable insulation layer extrusion device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S101: The PLC control panel (15) is responsible for monitoring and adjusting the operating state of the sprocket drive unit (6) to ensure that it operates at the set speed and torque. Driven by the sprocket drive unit (6), the twin-screw extrusion unit starts to work. The unit is responsible for heating, melting, plasticizing and extruding the insulating material to ensure that the material is extruded in the best state. The design of the twin-screw enables two cables to obtain a uniform insulation layer at the same time. S102: After the twin-screw extruder extrudes the molten insulating material, the active lead module (8) is responsible for guiding the cable conductor into the three-way extrusion head (7) so that the cable and the molten insulating material in the three-way extrusion head (7) meet and contact each other. The active lead module (8) ensures that the cable conductor is fed into the three-way extrusion head (7) at a stable speed; S103: After passing through the three-way extrusion head (7), the cable is led downward through the right-angle discharge elbow (9). The structural design of the right-angle discharge elbow (9) enables the cable to turn smoothly and enter the subsequent cooling process; S104: After the cable passes through the right-angle discharge elbow (9), it moves along the upper surface of the arc-shaped lead tube (12) through the pulley routing module (13). The pulley routing module (13) ensures that the cable maintains a stable traction force during the cooling process through a series of pulleys and a transmission system. At this time, the two cables maintain a consistent speed throughout the cooling process to avoid quality problems caused by speed differences. The cables located in the water-cooled housing (11) and the arc-shaped lead tube (12) are in a cooling state, that is, the coolant in the water-cooled housing (11) and the arc-shaped lead tube (12) quickly reduces the cable temperature, so that the molten insulating material quickly solidifies on the cable surface to form a uniform insulating layer.

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