A cable extrusion device with high bonding

Abstract

The application relates to the technical field of cable extrusion devices, and discloses a high-bonding-force cable extrusion device which comprises a cable traction machine and a spiral extruder, the cable traction machine and the spiral extruder are respectively provided with a cable extrusion end and a melting extrusion end, the cable extrusion end and the melting extrusion end are connected, a cable traction cavity for cable movement and melting coating is arranged in the cable extrusion end, a pressure point ring is arranged in the cable extrusion end and in front of a melting extrusion end connecting point, the pressure point ring is annular, the cable traction cavity passes through the center of the pressure point ring, a plurality of control cavities are arranged in a circumferential array on the pressure point ring, a fixing frame for separating the cavities is arranged between the control cavities, a driving block and a heating rod are arranged in the control cavities, a hot-pressing slot through which the heating rod passes is arranged on the inner side of the pressure point ring, the driving block drives the heating rod to pass through the hot-pressing slot, and the surface coating layer of the cable passing through the cable traction cavity is hot-pressed so that concave points are left on the cable coating layer.

Description

Technical Field

[0001] This invention relates to the field of cable extrusion equipment technology, specifically to a cable extrusion equipment with high bonding strength. Background Technology

[0002] Cable extrusion equipment is a core piece of equipment in the cable manufacturing process. It is mainly used to uniformly coat the outer layer of cable conductors with insulating material or sheathing. Its working principle involves heating and melting polymer materials, then extruding the molten material evenly onto the conductor surface through a molding die. After cooling and solidification, a dense coating layer is formed. This equipment typically consists of a control chamber, slide rails, heating rods, and an electromagnetic drive system. The heating rods reciprocate along the slide rails under the drive of sliding blocks, hot-pressing a spiral-shaped concave structure onto the cable surface. This design not only enhances the mechanical interlocking between the coating layer and the conductor but also significantly improves the electrical insulation performance and mechanical strength of the cable by optimizing material flowability and interfacial bonding. The equipment uses electromagnetic drive control, combined with a precision spring buffer system, to achieve high-speed and precise positioning of the heating rods, ensuring the uniformity and consistency of the concave distribution. Its modular design supports quick component replacement to adapt to the production needs of cables of different specifications, while also being compatible with the use of recycled materials, embodying the concept of green manufacturing. This equipment demonstrates significant advantages in improving production efficiency and ensuring cable quality, and is widely used in cable manufacturing for power transmission, communication networks, and new energy fields.

[0003] There are two main processes for multi-layer cable sheathing: single-layer extrusion with multiple layers and multi-layer co-extrusion. In multi-layer co-extrusion, multiple extruders work simultaneously, and the molten material is formed into a multi-layer structure in one step through the co-extrusion die. Although it is efficient and has good interlayer bonding, it requires multiple extruders and precision co-extrusion dies, resulting in high equipment costs. The melting temperature and fluidity of each layer of material need to be matched, and the parameters of multiple extruders (such as pressure and temperature) need to be balanced. The debugging cycle is long and the technical threshold is high. In the single-layer extrusion with multiple layers process, because the multi-layer sheathing is carried out after the previous sheathing layer has solidified, the interlayer bonding is significantly insufficient, which affects the overall cable performance. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a high-bonding-strength cable extrusion device that possesses the advantage of high bonding strength in single-layer superimposed extrusion, thus solving the problem of insufficient interlayer bonding strength in single-layer superimposed extrusion of cables.

[0006] (II) Technical Solution

[0007] To achieve the high bonding strength of the aforementioned single-layer superimposed extrusion, the present invention provides the following technical solution: a high-bonding-strength cable extrusion device, comprising a cable traction machine and a screw extruder. The cable traction machine is equipped with a track for traction of the cable. The cable traction machine and the screw extruder are respectively provided with a cable extrusion end and a melt extrusion end, which are connected. The cable extrusion end is provided with a cable traction cavity for cable movement and melt coating. The melt extrusion end extrudes the molten material in the screw extruder into the cable traction cavity. In the cable extrusion end, and before the connection point of the melt extrusion end, a pressure point ring is provided. The pressure point ring is annular, and the cable traction cavity passes through the center of the pressure point ring. The pressure point ring has a circumferential array of control cavities, and a fixing frame for separating the cavities is provided between the control cavities. The control cavity is provided with a drive block and a heating rod, and the inner side of the pressure point ring is provided with a hot-pressing groove for the heating rod to pass through. The drive block drives the heating rod through the hot-pressing groove to hot-press the cable surface coating layer passing through the cable traction cavity, leaving indentations on the cable coating layer.

[0008] The control cavity is equipped with slide rails on the fixed brackets on both sides, and the slide rails are equipped with movable sliding blocks. The heating rod is fixed on the sliding block and moves along the slide rail.

[0009] The driving block is a permanent magnet and is fixed at the end of the slide rail away from the hot-pressing groove. The sliding block is an electromagnet, which slides on the slide rail by changing its magnetism.

[0010] A steel spring is provided between the drive block and the sliding block.

[0011] The mounting bracket is made of magnetic shielding material.

[0012] The sliding block can be controlled independently. During the cable surface treatment process, the sliding blocks in different control chambers drive the heating rod to perform hot pressing in a clockwise or counterclockwise sequence, so that the cable surface coating layer forms spirally arranged concave dots.

[0013] The sliding block is provided with at least two heating rods, and the bottom contact surface of the heating rods is arc-shaped.

[0014] The pressure ring has cooling plates on both sides of the heating rod position, and the cooling plates are provided with pipes for the flow of coolant.

[0015] An infrared detector for detecting distance is provided in the cable traction cavity and at the front end of the pressure point ring.

[0016] The cable extrusion end is provided with a pipe for supplying nitrogen gas, so that the hot pressing of the heating rod and the molten layer coating of the extruded end are both completed in a nitrogen environment.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, the present invention provides a cable extrusion device with high bonding strength, which has the following beneficial effects:

[0019] 1. This high-bonding cable extrusion device creates regularly distributed dimples on the cable surface using heating rods on the pressure ring. This transforms the originally smooth coating interface into a micro-rough structure. When the molten material fills these dimples, mechanical interlocking forces replace simple physical adsorption, significantly improving shear strength and peel strength. Simultaneously, the heating process locally softens the underlying coating material, promoting molecular chain diffusion between the new melt and the existing coating layer, forming chemical bonds and a transition layer. This effectively blurs the interface boundary, fundamentally solving the problem of weak interlayer bonding in single-layer stacking processes. Traditional single-layer extrusion processes result in distinct interfaces due to material cooling and solidification, while this device achieves this through hot pressing... The synergistic effect of melting allows the new melt to penetrate deeply into the pores of the concave points under pressure, achieving molecular-level penetration. This penetration not only increases the effective contact area but also forms a three-dimensional network structure through molecular chain entanglement, significantly improving interfacial toughness. The control cavity of the pressure point ring adopts a modular design, allowing adjustment of heating rod temperature, pressure point density, and depth parameters to adapt to the coating requirements of different cable specifications. The collaborative control mechanism between the drive block and the heating rod makes the hot pressing process dynamically adjustable, ensuring both the uniformity of the coating layer and customized interface treatment for special cable structures. Compared to the complex flow channel design of multi-layer co-extrusion equipment, and with a more unique interface morphology, this allows for better subsequent cable inspection. During repair, the ultrasonic detection signal characteristics are more obvious, effectively improving the defect identification rate. Traditional smooth coating interfaces cause specular reflection of ultrasonic waves, and defect echoes are easily superimposed on interface waves, resulting in low detection signal recognition. This device, through the micro-dimpled structure formed by the pressure ring, constructs regularly distributed acoustic scattering centers at the interface. When ultrasonic waves encounter these dimples, multi-path reflection and diffraction phenomena occur, forming unique signal modulation characteristics. This modulation is like superimposing an "acoustic fingerprint" on the defect signal, making the defect echo exhibit identifiable waveform distortion in both the time and frequency domains. The detection instrument, through pattern recognition algorithms, can more accurately locate defects. The location significantly improves the detection rate of defects such as early microcracks and interface debonding. The concave structure also reduces the requirements for the fluidity of the coating material, thus reducing production costs. The concave structure of this device forms a local turbulence generator on the flow path of the molten material through the mechanical anchoring effect. When the melt flows through the concave point, it will generate a change in flow direction and velocity gradient. This disturbance enables the melt to fully wet the cable surface at a lower injection pressure. Just like setting a guide vane in a smooth pipe, the concave structure transforms laminar flow into a transitional flow state, effectively improving the radial thermal conductivity of the melt. At the same time, the negative pressure zone formed by the concave point generates a capillary effect, making it easier for the melt to penetrate into the micropores of the bottom coating layer.

[0020] 2. This high-bonding cable extrusion device employs a combination of permanent magnets and electromagnets for driving. The heating rod's movement is infinitely regulated by changes in magnetic polarity. This non-contact drive eliminates gap errors inherent in traditional mechanical transmissions. Combined with the linear motion guidance of the slide rail, it significantly improves the uniformity of the cable surface treatment. The electromagnetic drive system has millisecond-level response characteristics, enabling instantaneous switching of the heating rod's movement state. In production scenarios requiring rapid adjustment of the concave density or depth, the system can reconfigure the heating rod's position within 50ms, offering a faster response speed compared to hydraulic or motor-driven systems. This high dynamic performance is particularly suitable for flexible production needs requiring frequent switching of process parameters. The mechanical buffer system, composed of steel springs, effectively absorbs motion impact energy while maintaining high magnetic drive efficiency, significantly extending the service life of the equipment's core components. Its non-linear stiffness characteristics can automatically adapt to the sheath thickness of cables of different specifications, maintaining a constant hot-pressing contact pressure.

[0021] 3. This high-bonding-strength cable extrusion device overcomes the limitations of traditional uniform distribution through a spiral arrangement of concave dots. By controlling the phase difference between adjacent concave dots, a progressive interlocking structure is formed in the circumference of the cable. This arrangement ensures that the mechanical anchoring effect of each concave dot is staggered. When the cable is subjected to radial shear force, the stress distribution exhibits a spiral diffusion pattern, effectively avoiding stress concentration. The spiral arrangement creates a gradient change in the spacing between concave dots, forming a periodic material density modulation in the cable axis. This design, while ensuring interfacial bonding strength, allows the coating material to maintain a complete thickness in the sparse areas of the concave dots, avoiding excessive thinning. When the molten material flows through the spiral concave dots, the curvature change on the inner side of the concave dots triggers the Coanda effect, causing the melt flow direction to deflect. This deflection promotes the formation of a three-dimensional vortex flow around the concave dots, generating a local tensile stress field. Under the action of this stress field, the polymer chains move along the flow... The directional alignment of the moving parts forms a fiber-reinforced microstructure. This alignment allows the coating layer to effectively disperse the energy generated by partial discharge when subjected to an electric field, preventing charge concentration at material defects and thus improving voltage breakdown resistance. When using ultrasonic inspection, Bragg scattering occurs when the ultrasonic waves encounter a helical interface during propagation. Because the concave points are arranged in a periodic helical pattern, their spatial frequency resonates with the ultrasonic waves of a specific wavelength. When the wavelength of the detection sound wave matches the helical period, constructive interference occurs at a specific angle, forming a highly directional scattered beam. This beam acts like a searchlight beam, significantly enhancing the defect echo in a specific direction while effectively suppressing background noise. By receiving these directional scattered signals, the detection instrument can accurately determine the axial position of the defect, achieving "sound beam scanning" defect localization and significantly improving the detection signal-to-noise ratio. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the pressure point ring connection structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the internal structure of the cable extrusion end of the present invention;

[0025] Figure 4 This is a schematic diagram of the distribution of the pressure point ring control cavity in this invention;

[0026] Figure 5 This is a front view of the pressure point ring of the present invention;

[0027] Figure 6 Detailed illustration of the pressure point ring of the present invention Figure 1 ;

[0028] Figure 7 Detailed illustration of the pressure point ring of the present invention Figure 2 .

[0029] In the diagram: 1. Cable traction machine; 2. Screw extruder; 11. Cable extrusion end; 12. Pressure ring; 21. Melt extrusion end; 101. Cable; 102. Cable traction chamber; 103. Infrared detector; 104. Cooling plate; 121. Fixing frame; 122. Drive block; 123. Spring; 124. Sliding block; 125. Heating rod; 1201. Control chamber; 1211. Slide rail; 1251. Hot press groove. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figures 1-4A high-bonding-strength cable extrusion device includes a cable traction machine 1 and a screw extruder 2. The cable traction machine 1 is equipped with a track for traction of cable 101. The cable traction machine 1 and the screw extruder 2 are respectively equipped with a cable extrusion end 11 and a melt extrusion end 21, which are connected. The cable extrusion end 11 is equipped with a cable traction cavity 102 for cable movement and melt coating. The molten material in the screw extruder 2 is extruded into the cable traction cavity 102 through the melt extrusion end 21. A pressure ring 1 is provided in the cable extrusion end 11 before the connection point of the melt extrusion end 21. 2. The pressure point ring 12 is annular, and the cable traction cavity 102 passes through the center of the pressure point ring 12. The pressure point ring 12 has control cavities 1201 arranged in a circumferential array. A fixing frame 121 for separating the cavities is provided between the control cavities 1201. A driving block 122 and a heating rod 125 are provided in the control cavity 1201. A hot pressing groove 1251 for the heating rod 125 to pass through is provided on the inner side of the pressure point ring 12. The driving block 122 drives the heating rod 125 to pass through the hot pressing groove 1251 and hot press the surface covering layer of the cable 101 passing through the cable traction cavity 102, so that a concave point is left on the covering layer of the cable 101.

[0032] A cable 101 covered with one layer of insulation is transported by a cable traction machine 1 to a cable extrusion end 11 connected to a screw extruder 2 for a second layer of insulation. The screw extruder 2 melts the insulation material and extrudes it through the melt extrusion end 21 into the cable traction cavity 102 in the cable extrusion end 11. This allows the cable 101 to be covered with a new insulation layer as it passes through the cable traction cavity 102, achieving single-layer superimposed extrusion of the cable. However, because the layers in this single-layer superimposed extrusion are solid-state superimposed, each layer of material in the single-layer extrusion has cooled and solidified during superimposition. Unlike multi-layer co-extrusion, it cannot form a strong bond through the mutual diffusion of molecular chains in the molten state. The layers rely only on physical adsorption or mechanical interlocking and cannot form chemical bonds or molecular chain entanglement. The bonding force is weak, and interface delamination is likely to occur, which can easily lead to insufficient bonding force between layers and affect the overall performance of the cable. By setting a pressure point ring 12 in the cable extrusion end 11 and at the front end of the melt extrusion end 21, and having a control cavity 1201 arranged circumferentially on the pressure point ring 12, the control cavity 1201 is equipped with a control block 122. The heating rod 125, controlled by the drive block 122, moves to contact the insulation layer on the surface of the cable 101 in the cable traction cavity 102. The high temperature of the heating rod 125 causes the insulation layer on the surface of the cable 101 to form pits and partially melt. The cable 101 with pits and partially melted insulation layer is then covered by molten material extruded from the molten extrusion end 21. The pits create a micro-rough surface on the surface of the cable 101. When the molten material fills and covers the cable 101, the interface bonding between the two covering layers changes from simple physical adsorption to mechanical interlocking, significantly enhancing the shear and peel resistance. Furthermore, the heating of the heating rod 125 causes partial softening and melting of the surface of the first layer of the cable 101, allowing the subsequent melt to penetrate into the pits under pressure and cause molecular chain entanglement. The diffusion of molecular chains forms a transition layer, blurring the interface boundary and effectively increasing the bonding force between the single-layer superimposed cable insulation layers. At the same time, compared with multi-layer co-extrusion devices, the equipment parameters are easier to adjust and the equipment cost is lower.

[0033] See Figures 4-7The control cavity 1201 has slide rails 1211 on both sides of the fixing brackets 121. Slide rails 1211 have movable sliding blocks 124. The heating rod 125 is fixed to the sliding block 124 and moves along the slide rail 1211. The sliding block 124 drives the heating rod 125 to pass through the hot-pressing groove 1251 along the slide rail 1211 to achieve hot pressing on the surface coating of the cable 101, forming a concave point. The driving block 122 is a permanent magnet and is fixed at the end of the slide rail 1211 away from the hot-pressing groove 1251. The sliding block... 124 is an electromagnet that slides on the slide rail 1211 by changing its magnetism. When the magnetism is the same, the sliding block 124 drives the heating rod 125 to move towards the hot pressing groove 1251. When the magnetism is different, the sliding block 124 drives the heating rod 125 to move towards the driving block 122. A steel spring 123 is provided between the driving block 122 and the sliding block 124. The spring 123 increases the resistance of the sliding block 124 during its movement, preventing the equipment from being damaged due to excessive speed or the formation of excessively large indentations.

[0034] The fixing frame 121 is made of magnetic shielding material to prevent the driving block 122 and sliding block 124 in different control cavities 1201 from affecting each other.

[0035] The sliding block 124 can be controlled independently. During the surface treatment of the cable 101, the sliding blocks 124 in different control cavities 1201 drive the heating rod 125 to perform hot pressing in a clockwise or counterclockwise sequence, so that the surface coating of the cable 101 forms a spiral arrangement of concave dots. If the area of ​​the concave dots on the surface of the coating is too large, the overall thickness will be thinner and the strength will be affected. However, the spiral arrangement of concave dots can ensure that the concave dots are evenly distributed while avoiding an excessive area of ​​concave dots, thus ensuring the bonding strength.

[0036] The sliding block 124 is provided with at least two heating rods 125, and the bottom contact surface of the heating rod 125 is arc-shaped, so that the heating rod 125 forms an arc-shaped concave point during hot pressing, thus avoiding stress concentration.

[0037] The pressure ring 12 is provided with cooling plates 104 on both sides of the heating rod 125. The cooling plates 104 are provided with pipes for the flow of coolant. The cooling plates 104 prevent the heating rod 125 from causing the overall internal temperature of the cable extrusion end 11 to be too high, which could damage the equipment or cause the surface coating of the cable 101 to melt excessively, thus reducing product quality.

[0038] An infrared detector 103 for detecting distance is provided in the cable traction cavity 102 and at the front end of the pressure point ring 12.

[0039] The cable extrusion end 11 is provided with a pipe for supplying nitrogen gas, so that the hot pressing of the heating rod 125 and the molten layer coating of the extruded end 21 are completed in a nitrogen environment, thus avoiding material oxidation.

[0040] Working principle: A cable 101 covered with one layer of insulation is transported by a cable traction machine 1 to a cable extrusion end 11 connected to a screw extruder 2 for a second layer of insulation. The screw extruder 2 melts the insulation material and extrudes it through the melt extrusion end 21 into the cable traction cavity 102 in the cable extrusion end 11. This allows the cable 101 to be covered with a new insulation layer as it passes through the cable traction cavity 102, achieving single-layer superimposed extrusion of the cable. However, because the layers in this single-layer superimposed extrusion are solid-state superimposed, each layer of material in the single-layer extrusion has cooled and solidified during superimposition. Unlike multi-layer co-extrusion, it cannot form a strong bond through the mutual diffusion of molecular chains in the molten state. The layers rely only on physical adsorption or mechanical interlocking and cannot form chemical bonds or molecular chain entanglement. The bonding force is weak, and interface delamination is prone to occur, which can easily lead to insufficient bonding force between layers and affect the overall performance of the cable. By setting a pressure point ring 12 in the cable extrusion end 11 and at the front end of the melt extrusion end 21, and having a control cavity 1201 circumferentially arrayed on the pressure point ring 12, the control cavity 1201 is equipped with a drive block 1 The heating rod 125, controlled by the drive block 122, moves to contact the insulation layer on the surface of the cable 101 in the cable traction cavity 102. The high temperature of the heating rod 125 causes the insulation layer on the surface of the cable 101 to form pits and partially melt. The cable 101 with pits and partially melted insulation layer is then covered by molten material extruded from the molten extrusion end 21. The pits create a micro-rough surface on the surface of the cable 101. When the molten material fills and covers the cable 101, the interface bonding between the two covering layers changes from simple physical adsorption to mechanical interlocking, significantly enhancing the shear and peel resistance. Furthermore, the heating of the heating rod 125 causes partial softening and melting of the surface of the first layer of the cable 101, allowing the subsequent melt to penetrate into the pits under pressure and cause molecular chain entanglement. The diffusion of molecular chains forms a transition layer, blurring the interface boundary and effectively increasing the bonding force between the single-layer superimposed cable insulation layers. At the same time, compared with multi-layer co-extrusion devices, the equipment parameters are easier to adjust and the equipment cost is lower.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-bonding-strength cable extrusion device, comprising a cable traction machine (1) and a screw extruder (2), wherein the cable traction machine (1) is provided with a track for traction of a cable (101), the cable traction machine (1) and the screw extruder (2) are respectively provided with a cable extrusion end (11) and a melt extrusion end (21), the cable extrusion end (11) and the melt extrusion end (21) are connected, the cable extrusion end (11) is provided with a cable traction cavity (102) for cable movement and melt coating, and the molten material in the screw extruder (2) is extruded into the cable traction cavity (102) through the melt extrusion end (21), characterized in that: In the cable extrusion end (11), and in front of the connection point of the melt extrusion end (21), there is a pressure ring (12). The pressure ring (12) is annular, and the cable traction cavity (102) passes through the center of the pressure ring (12). The pressure ring (12) has a circumferential array of control cavities (1201). There is a fixing frame (121) between the control cavities (1201) for separating the cavities. The control cavity (1201) is provided with a driving block (122) and a heating rod (125). The inner side of the pressure ring (12) is provided with a hot pressing groove (1251) for the heating rod (125) to pass through. The driving block (122) drives the heating rod (125) to pass through the hot pressing groove (1251) and hot presses the surface coating of the cable (101) passing through the cable traction cavity (102), so that the cable (101) coating has a concave point.

2. The high-bonding-strength cable extrusion device according to claim 1, characterized in that: The control cavity (1201) has slide rails (1211) on the fixed brackets (121) on both sides, and slide blocks (124) that can move are provided on the slide rails (1211). The heating rod (125) is fixed on the slide block (124) and moves along the slide rail (1211).

3. The high-bonding-strength cable extrusion device according to claim 2, characterized in that: The driving block (122) is a permanent magnet and is fixed at the end of the slide rail (1211) away from the hot-pressing groove (1251). The sliding block (124) is an electromagnet and slides on the slide rail (1211) by changing its magnetism.

4. The high-bonding-strength cable extrusion device according to claim 3, characterized in that: A steel spring (123) is provided between the drive block (122) and the sliding block (124).

5. A high-bonding-strength cable extrusion device according to claim 4, characterized in that: The mounting bracket (121) is made of magnetic shielding material.

6. The high-bonding-strength cable extrusion device according to claim 4, characterized in that: The sliding block (124) can be controlled independently. During the surface treatment of the cable (101), the sliding blocks (124) in different control chambers (1201) drive the heating rod (125) to perform hot pressing in a clockwise or counterclockwise order, so that the surface coating of the cable (101) forms a spiral arrangement of concave dots.

7. A high-bonding-strength cable extrusion device according to claim 6, characterized in that: The sliding block (124) is provided with at least two heating rods (125), and the bottom contact surface of the heating rods (125) is arc-shaped.

8. The high-bonding-strength cable extrusion device according to claim 1, characterized in that: The pressure ring (12) has cooling plates (104) on both sides of the heating rod (125), and the cooling plates (104) are provided with pipes for the flow of coolant.

9. A high-bonding-strength cable extrusion device according to claim 1, characterized in that: An infrared detector (103) for detecting distance is provided in the cable traction cavity (102) and at the front end of the pressure point ring (12).

10. A high-bonding-strength cable extrusion apparatus according to any one of claims 1-9, characterized in that: The cable extrusion end (11) is provided with a pipe for nitrogen gas to be introduced, so that the hot pressing of the heating rod (125) and the molten layer coating of the extruded end (21) are both completed in a nitrogen environment.

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