A multi-layer co-extruded cable core overmolding apparatus

Abstract

The application belongs to the technical field of power cable production, in particular to a multi-layer co-extrusion cable core coating forming equipment, which comprises a casing, wire feeding reels and wire winding reels are symmetrically arranged on both sides of the casing, a multi-layer co-extrusion die is arranged in the casing, a co-extrusion machine is fixedly installed on the top of the casing, and the co-extrusion machine is connected with the multi-layer co-extrusion die through a through-flow pipeline. The cross-linked polyethylene insulated power cable core is continuously detected for running and bending by the detection assembly, and the cable core is subjected to follow-up self-adaptive straightening operation by the wire straightening assembly, so that the cross-linked polyethylene insulated power cable core can keep a straightened state when entering the multi-layer co-extrusion die, and the cross-linked polyethylene insulated power cable core cannot keep a straight conveying state during the wire feeding reel unwinding and the wire winding reel winding, thereby affecting the concentricity and the fitting precision between layers of the multi-layer co-extrusion die.

Description

Technical Field

[0001] This invention belongs to the field of power cable production technology, specifically a multi-layer co-extrusion cable core coating molding equipment. Background Technology

[0002] Cross-linked polyethylene (XLPE) insulated power cables, also known as XLPE insulated power cables, are power cables that use cross-linked polyethylene (XLPE) as the core insulation material for transmitting and distributing industrial frequency AC power. Through chemical cross-linking or physical irradiation, the linear molecular structure of ordinary polyethylene material is transformed into a three-dimensional network structure, significantly improving its heat resistance, pressure resistance, aging resistance, and overload resistance. It is currently the most widely used and mainstream power cable product globally.

[0003] Multi-layer co-extrusion cable core coating molding equipment is a specialized continuous production equipment used in the cable manufacturing industry for the simultaneous extrusion coating of multiple layers of insulation, shielding, and sheathing materials onto cable cores. It mainly uses multiple extruders in conjunction with multi-layer co-extrusion dies, with traction, straightening, temperature control, and winding and unwinding mechanisms working together to simultaneously and seamlessly coat the cable core with multiple polymer materials in the same process, forming a multi-layer integrated composite structure. It is the core main equipment for the production of medium and high voltage power cables and special cables.

[0004] In the current technology, during the cable core wrapping process, the cable feeder mainly completes the unloading and conveying of the cable core, while the winding reel is responsible for the traction and winding of the finished cable. The two work together to form the feeding and receiving system of the wrapping production line.

[0005] Since cable cores are mostly slender and flexible structures, they are easily affected by their own curling stress and traction tension fluctuations during the entire process of loosening, pulling, wrapping, and winding. This causes the connection between the wrapped and unwrapped sections of the cable core to bend and wobble before entering the wrapping mold, resulting in the cable being in a bent state before wrapping, which in turn affects the forming effect of the cable core during wrapping.

[0006] Therefore, the present invention provides a multi-layer co-extrusion cable core coating molding equipment. Summary of the Invention

[0007] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0008] The technical solution adopted by this invention to solve its technical problem is as follows: A multi-layer co-extrusion cable core coating molding equipment, comprising a housing, with a wire feeding reel and a winding reel symmetrically arranged on both sides of the housing. A multi-layer co-extrusion die is arranged inside the housing. A co-extruder is fixedly installed on the top of the housing. The co-extruder and the multi-layer co-extrusion die are connected by a flow pipe. The multi-layer co-extrusion die is placed between the wire feeding reel and the winding reel. Two winding boxes are symmetrically fixedly installed inside the housing, and each winding box is placed within the multi-layer co-extrusion die. On both sides of the co-extrusion die, the two cable straightening boxes have the same internal structure. Multiple rectangular boxes are symmetrically fixedly installed inside the cable straightening boxes. The rectangular boxes are equipped with detection components. The detection components are used to automatically detect whether the cable core has misalignment or bending during cable core transportation. The cable straightening boxes are equipped with cable straightening components. The cable straightening components include multiple sets of straightening shafts. When the detection components detect that the cable core has misalignment or bending, the cable straightening components use multiple sets of straightening shafts to adaptively straighten the cable core.

[0009] Preferably, the cable straightening assembly also includes multiple sets of frame plates, each set of frame plates has a positioning shaft fixedly installed on its inner wall, the inner walls of the multiple sets of cable straightening shafts are rotatably connected to the outer walls of the multiple positioning shafts, the multiple sets of cable straightening shafts are placed inside the multiple sets of frame plates, and the annular grooves on the inner walls of the multiple sets of cable straightening shafts can slide against the outer wall of the cable core.

[0010] Preferably, the cable tray is symmetrically arranged with multiple sets of trays inside, and limit rods are fixedly installed on the outer walls of the multiple sets of trays. The outer walls of the multiple limit rods can be slidably connected to the inner walls of the multiple sets of trays, and the outer walls of the multiple sets of trays are slidably connected to the inner walls of the multiple sets of trays. A return spring is provided between the outer walls of the multiple sets of trays and the inner walls of the multiple sets of trays.

[0011] Preferably, rectangular blocks are symmetrically fixedly installed on the outer walls of multiple sets of racks, and multiple guide rods are symmetrically fixedly installed on the inner walls of the cable tray. The inner walls of the multiple rectangular blocks can be slidably connected to the outer walls of the multiple guide rods, and the outer walls of the multiple guide rods are fixedly connected to the inner walls of the multiple rectangular boxes.

[0012] Preferably, the detection component includes two slotted shafts, which are symmetrically fixed inside the rectangular block. A pressure sensor is fixedly installed on the inner wall of the slotted shaft, and a pressure-sensitive spring is provided inside the slotted shaft. A pressure-transmitting diaphragm is fixedly installed at both ends of the pressure-sensitive spring. The top of one pressure-transmitting diaphragm can fit in contact with the outer wall of the pressure sensor, and a pressure-transmitting component is provided between the bottom of the other pressure-transmitting diaphragm and the top of the rectangular block.

[0013] Preferably, the pressure transmission assembly includes two push rods, the outer walls of the two push rods are slidably connected to the inner walls of the two groove shafts respectively, and the tops of the two push rods can be in contact with the bottoms of the other two pressure transmission diaphragms.

[0014] Preferably, a shaft is fixedly installed on the inner wall of the rectangular box, and a semi-ring block is fixedly installed on the top of each of the two rectangular blocks. A hinge plate is symmetrically hinged to the outer wall of the shaft, and one end of each of the two hinge plates is hinged to one end of each of the two semi-ring blocks. The bottom ends of the two push rods can slide against the tops of the two hinge plates.

[0015] Preferably, a hanging plate is fixedly installed at the bottom of the shaft, and electromagnets are symmetrically fixedly installed on both sides of the hanging plate. Magnetic blocks are fixedly installed inside the two rectangular blocks, and the two magnetic blocks are respectively set opposite to the two electromagnets.

[0016] Preferably, multiple limiting shafts are symmetrically fixedly installed on the inner wall of the cable winding box, and the outer walls of the multiple limiting shafts can be slidably connected to the inner walls of the multiple slot plates. A pressure spring is provided between one side of the multiple slot plates and the inner wall of the cable winding box. Pull rods are symmetrically fixedly installed on the outer walls of the multiple slot plates, and the outer walls of the multiple pull rods are slidably connected to the inner wall of the cable winding box.

[0017] Preferably, vertical rods are symmetrically fixedly installed on the outer wall of the cable winding box, and telescopic rods are fixedly installed on the outer walls of multiple vertical rods. Pull plates are fixedly installed on the output ends of multiple telescopic rods, and one side of each pull plate is fixedly connected to one end of multiple pull rods.

[0018] The beneficial effects of this invention are as follows: 1. The multi-layer co-extrusion cable core coating molding equipment of the present invention continuously detects the positioning and bending of the cross-linked polyethylene insulated power cable core through a detection component, and performs adaptive straightening of the cable core with a straightening component. This ensures that the cross-linked polyethylene insulated power cable core remains straight when it enters the multi-layer co-extrusion mold, preventing the cable core from failing to maintain a straight conveying state during the unloading of the cable core and the winding of the cable core, which would affect the concentricity of the coating and the bonding accuracy between layers.

[0019] 2. The multi-layer co-extrusion cable core coating molding equipment of the present invention, when the rectangular block moves, the rectangular block will drive the semi-ring block to move, and the semi-ring block will drive the hinge plate to slide on the shaft. When the hinge plate slides between the shaft and the semi-ring block, the hinge plate will push the push rod by moving, so that the push rod will squeeze the pressure spring in the groove shaft, and then squeeze the pressure spring through the pressure diaphragm, so that the pressure spring will sense the pressure of the pressure sensor, thereby detecting that the cable core has shifted significantly to the corresponding side, thus playing the role of detecting cable core offset.

[0020] 3. The multi-layer co-extrusion cable core coating molding equipment of the present invention adopts a spring sliding structure, abandoning the rigid extrusion of the fixed straightening structure. With the relative cooperation of multiple sets of straightening shafts, on the one hand, it can avoid damage such as scratches, indentations, and stress concentration on the surface of the cable core due to rigid extrusion during movement, thus playing a role in flexibly limiting the movement of the cable core. On the other hand, through the elastic push of the return spring, in conjunction with the setting of multiple sets of straightening shafts, preliminary straightening work can be performed on the cable core during movement.

[0021] 4. The multi-layer co-extrusion cable core coating molding equipment of the present invention operates by driving a telescopic rod. The telescopic rod moves the pull plate, which in turn moves the pull rod. This causes the pull rod to open the straightening shaft in the straightening box through the groove plate. The telescopic rod moves the groove plate in the straightening box, thereby opening two straightening shafts in the straightening box. When the telescopic rod drives the straightening shaft to make reset contact with the outside of the cable core through the groove plate, multiple sets of straightening shafts can perform bonding and straightening operations on cable cores of different diameters.

[0022] 5. The multi-layer co-extrusion cable core coating molding equipment of the present invention, when the frame plate moves the rectangular block, the pressure sensor detects the pressure, and the corresponding electromagnet on the hanging plate will work, thereby magnetically attracting the magnetic block in the rectangular block, pulling the magnetic block to drive the rectangular block to reset. When the pressure values ​​in the pressure sensors in the two rectangular blocks are in the same state, it means that the two winding shafts are in a symmetrical state, which plays a role in forcibly pulling the winding shaft to reset. Attached Figure Description

[0023] The invention will now be further described with reference to the accompanying drawings.

[0024] Figure 1 This is an overall diagram of the invention; Figure 2 This is a main body diagram of the present invention; Figure 3 This is the front view of the present invention; Figure 4 This is a schematic diagram of the structure of the pull plate in this invention; Figure 5 This is a schematic diagram of the structure of the cable straightening box in this invention; Figure 6 This is a schematic diagram of the structure of the groove plate in this invention; Figure 7 This is a schematic diagram of the structure at the thread-straightening spool in this invention; Figure 8 This is a schematic diagram of the structure of the frame plate in this invention; Figure 9This is a schematic diagram of the structure at the hinge plate in this invention; Figure 10 This is a schematic diagram of the push rod structure in this invention.

[0025] In the diagram: 1. Housing; 2. Co-extruder; 3. Wire feed reel; 301. Winding reel; 4. Multi-layer co-extrusion die; 5. Winding box; 6. Telescopic rod; 601. Pull plate; 602. Pull rod; 7. Rectangular box; 8. Winding shaft; 801. Frame plate; 802. Positioning shaft; 803. Return spring; 804. Limiting rod; 9. Groove plate; 901. Pressure spring; 902. Limiting shaft; 10. Guide rod; 11. Rectangular block; 1101. Magnetic block; 1102. Semi-ring block; 1103. Hinge plate; 12. Shaft; 1201. Hanging plate; 1202. Electromagnet; 13. Groove shaft; 1301. Push rod; 1302. Pressure spring; 1303. Pressure sensor; 1304. Pressure transmitting diaphragm. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0027] like Figures 1 to 10 As shown in the embodiment of the present invention, a multi-layer co-extrusion cable core coating molding equipment includes a housing 1. A wire feed reel 3 and a winding reel 301 are symmetrically arranged on both sides of the housing 1. A multi-layer co-extrusion mold 4 is disposed inside the housing 1. A co-extruder 2 is fixedly installed on the top of the housing 1, positioned directly above the multi-layer co-extrusion mold 4. The co-extruder 2 and the multi-layer co-extrusion mold 4 are connected by a flow pipe. The multi-layer co-extrusion mold 4 is positioned between the wire feed reel 3 and the winding reel 301. Two winding boxes 5 are symmetrically fixedly installed inside the housing 1, with each winding box 5 positioned on one side of the multi-layer co-extrusion mold 4. The two cable straightening boxes 5 have the same internal structure. Multiple rectangular boxes 7 are symmetrically fixedly installed inside the cable straightening box 5. The multiple rectangular boxes 7 have the same internal structure. The rectangular boxes 7 are equipped with a detection component. The detection component is used to automatically detect whether the cable core has misalignment or bending during cable core transportation. The cable straightening box 5 is equipped with a cable straightening component. The cable straightening component includes multiple sets of cable straightening shafts 8. The multiple sets of cable straightening shafts 8 are placed between the multiple rectangular boxes 7. When the detection component detects that the cable core has misalignment or bending, the cable straightening component is used to adaptively straighten the cable core through the multiple sets of cable straightening shafts 8. Since cable cores are mostly slender and flexible structures, during the entire process of loosening, pulling, covering, and winding, the cable core may be bent and sway at the connection between the covered and uncovered sections before entering the covering mold due to factors such as its own curling stress and traction tension fluctuations. When it is necessary to coat the core of a cross-linked polyethylene (XLPE) insulated power cable, the XLPE insulated power cable core is installed on the feed reel 3, and then one end is pulled through the multi-layer co-extrusion die 4 and installed on the winding reel 301. The feed reel 3 and winding reel 301 are then driven to move relative to each other, causing the XLPE insulated power cable core to unwind and wind up. The co-extruder 2 then performs a co-extrusion coating operation on the moving XLPE insulated power cable core through the multi-layer co-extrusion die 4, thereby achieving the coating of the XLPE insulated power cable core. In the multi-layer co-extrusion coating process of the cable core, when the cross-linked polyethylene insulated power cable core is moving, the detection components in multiple rectangular boxes 7 within the two winding boxes 5 continuously detect the movement and bending of the cross-linked polyethylene insulated power cable core. In conjunction with the winding assembly, multiple winding shafts 8 perform adaptive straightening of the cable core, ensuring that the cross-linked polyethylene insulated power cable core remains straight when it enters the multi-layer co-extrusion mold 4. This prevents the cable core from being loosened on the delivery reel 3 and wound on the winding reel 301. During the winding process, the cable core is affected by its own winding stress, traction tension fluctuations, and the conveying path. This causes bending and swaying at the connection point between the covered and uncovered sections, preventing the cross-linked polyethylene insulated power cable core from maintaining a straight conveying state. Consequently, this affects the concentricity of the multi-layer co-extrusion die 4 and the bonding accuracy between layers. By using a detection component in conjunction with a cable straightening component, when the cross-linked polyethylene insulated power cable core moves to be covered by the multi-layer co-extrusion die 4, the multi-layer co-extrusion die 4 can better cover the cable core. In the molding process, it should be noted that the co-extruder 2 consists of multiple extruders, each including a drive motor and a barrel. The multi-layer co-extrusion die 4 includes a cooling mechanism and a multi-layer diversion channel system. During operation, the discharge end of each extruder is sealed and connected to the die body of the multi-layer co-extrusion die 4 through the corresponding diversion channel. The molten material output from each extruder is synchronously transported to the multi-layer co-extrusion die 4 through the corresponding diversion channel. After stratification and convergence inside the die, the material is uniformly coated on the outer periphery of the cable core. Both of these are existing technologies, so they are only described in this solution.

[0028] like Figures 6 to 8 As shown, the cable straightening assembly also includes multiple sets of rack plates 801, multiple sets of cable straightening shafts 8 and multiple sets of rack plates 801 are the same in number, and each set of cable straightening shafts 8 and rack plates 801 are symmetrically arranged. The inner walls of multiple sets of rack plates 801 are fixedly installed with positioning shafts 802. The inner walls of multiple sets of cable straightening shafts 8 are rotatably connected to the outer walls of multiple positioning shafts 802 respectively. Multiple sets of cable straightening shafts 8 are placed inside multiple sets of rack plates 801 respectively. The inner wall annular grooves of multiple sets of cable straightening shafts 8 can slide in contact with the outer wall of the cable core. When straightening of the cable core is required, multiple sets of support plates 801 are pushed towards the cable core. The support plates 801 then move the straightening shafts 8 towards the outer wall of the cable core. As the cable core moves, it moves between the multiple sets of straightening shafts 8. These shafts 8 rotate on the positioning shaft 802 due to the displacement of the cable core. Two straightening boxes 5 are positioned on both sides of the multi-layer co-extrusion mold 4. When the cable core is loosened and wrapped... During the forming and winding process, multiple sets of winding shafts 8 in the two winding boxes 5 straighten the unwrapped end and the wrapped forming end of the cable core on both sides of the multi-layer co-extrusion mold 4. This ensures that the cable core is straight when entering and exiting the multi-layer co-extrusion mold 4, preventing it from being misaligned due to the operational fluctuations of the wire feeding reel 3 and the winding reel 301. This takes into account the straightening requirements at both ends, ensuring the long-term stability of the cable and playing the role of winding.

[0029] like Figures 6 to 8 As shown, the cable straightening box 5 has multiple sets of slot plates 9 symmetrically arranged inside. The outer walls of the multiple sets of rack plates 801 are all fixedly installed with limit rods 804. The outer walls of the multiple limit rods 804 can be slidably connected to the inner walls of the multiple sets of slot plates 9. The outer walls of the multiple sets of rack plates 801 are slidably connected to the inner walls of the multiple sets of slot plates 9. A return spring 803 is provided between the outer walls of the multiple sets of rack plates 801 and the inner walls of the multiple sets of slot plates 9. The multiple return springs 803 are respectively placed outside the multiple limit rods 804. When the cable core travels along the inner wall of the winding shaft 8, if the cable core bends or sways, it will exert radial pressure on the winding shaft 8 and the support plate 801. This forces the support plate 801 to slide along the inner wall of the channel plate 9 inwards. The limiting rod 804 will then slide synchronously with the support plate 801. The return spring 803 will then rely on its own elastic potential energy to reset and counteract the radial pressure generated by the cable core, thereby pushing the support plate 801 to slide in the opposite direction along the channel plate 9. This spring-sliding structure eliminates the need for... The rigid compression of the fixed cable straightening structure, combined with the relative operation of multiple sets of cable straightening shafts 8, can, on the one hand, prevent damage such as scratches, indentations, and stress concentration on the surface of the cable core due to rigid compression during movement, thus playing a role in flexibly limiting the movement of the cable core. On the other hand, through the elastic push of the return spring 803, combined with the setting of multiple sets of cable straightening shafts 8, a preliminary straightening operation can be performed on the cable core during movement. It should be noted that the inner wall groove of the cable straightening shaft 8 is covered with a soft rubber pad.

[0030] like Figures 6 to 8 As shown, rectangular blocks 11 are symmetrically fixedly installed on the outer walls of multiple sets of racks 801, and multiple guide rods 10 are symmetrically fixedly installed on the inner walls of the cable straightening box 5. The inner walls of the multiple rectangular blocks 11 can be slidably connected to the outer walls of the multiple guide rods 10, and the outer walls of the multiple guide rods 10 are fixedly connected to the inner walls of the multiple rectangular boxes 7. When the radial pressure exerted on the straightening shaft 8 by the cable core's swaying and bending is too large, the straightening shaft 8 will be pushed by the cable core, causing the frame plate 801 to slide radially along the trough plate 9. Simultaneously, the rectangular blocks 11 symmetrically fixed to its outer wall will slide linearly along the outer wall of the guide rod 10. When the reset spring 803 pushes the frame plate 801 to reset, the rectangular blocks 11 will simultaneously slide back to the initial position along the guide rod 10, playing a guiding role and limiting the movement direction and the movement basis of the straightening shaft 8.

[0031] like Figures 8 to 10 As shown, the detection assembly includes two slotted shafts 13. The two slotted shafts 13 are symmetrically fixed inside the rectangular box 7. The internal structures of the two slotted shafts 13 are the same. A pressure sensor 1303 is fixedly installed on the inner wall of the slotted shaft 13. A pressure-sensitive spring 1302 is provided inside the slotted shaft 13. A pressure-transmitting diaphragm 1304 is fixedly installed at both ends of the pressure-sensitive spring 1302. The top of one pressure-transmitting diaphragm 1304 can be in contact with the outer wall of the pressure sensor 1303. A pressure-transmitting assembly is provided between the bottom of the other pressure-transmitting diaphragm 1304 and the top of the rectangular block 11. When the cable core is excessively offset between the two winding shafts 8 due to the traction of the winding reel 301 and the cable feed reel 3, and the elastic support of the return spring 803 cannot push it to return to its original position, the cable core will push the winding shaft 8 to move into the slot plate 9 by squeezing the return spring 803 through the frame plate 801. The frame plate 801 will then drive the corresponding rectangular block 11 to move. When the rectangular block 11 moves, it will actuate the pressure transmission component. The pressure transmission component pushes the pressure transmission diaphragm 1304 within the slot shaft 13, thereby causing it to pass through the pressure transmission diaphragm 1304. 4. The pressure spring 1302 is squeezed, which causes the pressure spring 1302 to sense the pressure of the pressure sensor 1303. This detects that the cable core has shifted significantly to the corresponding side, thus determining that the cable core is shifted in this direction by the traction of the winding reel 301 and the cable feeding reel 3. This serves as a judgment for subsequent position correction of the cable core and facilitates the subsequent forced straightening operation of the cable core. It should be noted that in the initial state, the pressure values ​​of the pressure sensors 1303 in the two slot shafts 13 are the same.

[0032] like Figures 9 to 10 As shown, the pressure transmission assembly includes two push rods 1301. The outer walls of the two push rods 1301 are slidably connected to the inner walls of the two groove shafts 13, respectively. The tops of the two push rods 1301 can be in contact with the bottoms of the other two pressure transmission diaphragms 1304. The two groove shafts 13 are respectively positioned above the sides of the two rectangular blocks 11. When the rectangular block 11 moves, it will trigger the push rod 1301 to move through the pressure transmission component. The push rod 1301 will then move within the groove shaft 13, thereby pushing the pressure transmission diaphragm 1304 to squeeze and push the pressure spring 1302, thus pushing the pressure spring 1302.

[0033] like Figures 9 to 10 As shown, a shaft 12 is fixedly installed on the inner wall of the rectangular box 7, and a semi-ring block 1102 is fixedly installed on the top of each of the two rectangular blocks 11. A hinge plate 1103 is symmetrically hinged to the outer wall of the shaft 12. One end of the two hinge plates 1103 is respectively hinged to one end of the two semi-ring blocks 1102. The bottom ends of the two push rods 1301 can slide against the top of the two hinge plates 1103. When the rectangular block 11 moves, it will drive the semi-ring block 1102 to move. The semi-ring block 1102 will then drive the hinge plate 1103 to slide on the shaft 12. When the hinge plate 1103 slides between the shaft 12 and the semi-ring block 1102, the hinge plate 1103 will push the push rod 1301 by moving, so that the push rod 1301 will squeeze the pressure spring 1302 in the groove shaft 13, thus playing the role of squeezing the pressure sensor 1303.

[0034] like Figures 8 to 9 As shown, a hanging plate 1201 is fixedly installed at the bottom of the shaft 12, and electromagnets 1202 are symmetrically fixedly installed on both sides of the hanging plate 1201. Magnetic blocks 1101 are fixedly installed inside the two rectangular blocks 11, and the two magnetic blocks 1101 are respectively set opposite to the two electromagnets 1202. When the frame plate 801 moves the rectangular block 11, the pressure sensor 1303 detects the pressure, and the corresponding electromagnet 1202 on the hanging plate 1201 will work, thereby magnetically attracting the magnetic block 1101 inside the rectangular block 11, pulling the magnetic block 1101 to drive the rectangular block 11 to reset. When the pressure values ​​in the pressure sensors 1303 inside the two rectangular blocks 11 are in the same state, it means that the two winding shafts 8 are in a symmetrical state, which plays the role of forcibly pulling the winding shaft 8 to reset.

[0035] like Figures 6 to 7 As shown, multiple limiting shafts 902 are symmetrically fixedly installed on the inner wall of the cable winding box 5. The outer walls of the multiple limiting shafts 902 can be slidably connected to the inner walls of the multiple slot plates 9. A pressure spring 901 is provided between one side of the multiple slot plates 9 and the inner wall of the cable winding box 5. Pull rods 602 are symmetrically fixedly installed on the outer walls of the multiple slot plates 9. The outer walls of the multiple pull rods 602 are slidably connected to the inner wall of the cable winding box 5. When it is necessary to thread the cable core, the pull rod 602 is moved to both sides of the cable winding box 5. When the pull rod 602 moves, it pulls the channel plate 9 to move inside the cable winding box 5. The channel plate 9 then drives the cable winding shaft 8 to move by pressing the pressure spring 901 on the limit shaft 902, thereby opening the gap between the two cable winding shafts 8. Then, the cable core can be pulled through the gap between the two cable winding shafts 8. When finished, the pulling of the lever 602 can be stopped, and the pressure spring 901 will push the slot plate 9 to move the winding shaft 8 to reset through elastic thrust. The outer wall of the winding shaft 8 will then contact the outer wall of the cable core, which will open the two winding shafts 8. The pressure spring 901 is mainly set to buffer the movement path of the slot plate 9 when it moves to the winding box 5.

[0036] like Figures 5 to 7 As shown, vertical rods are symmetrically fixedly installed on the outer wall of the cable winding box 5. Telescopic rods 6 are fixedly installed on the outer wall of multiple vertical rods. Pull plates 601 are fixedly installed on the output ends of multiple telescopic rods 6. Two pull plates 601 are respectively placed on one side of the cable winding box 5. One side of the two pull plates 601 is fixedly connected to one end of multiple pull rods 602 respectively. When the pull rod 602 needs to be moved, the telescopic rod 6 is driven to move the pull plate 601. The pull plate 601 then moves the pull rod 602, causing the pull rod 602 to open the cable straightening shaft 8 in the cable straightening box 5 via the slot plate 9. This provides power for opening the two cable straightening shafts 8. The telescopic rod 6 moves the slot plate 9 in the cable straightening box 5, which in turn opens the two cable straightening shafts 8 in the cable straightening box 5. When the telescopic rod 6 moves the cable straightening shaft 8 to the outside of the cable core via the slot plate 9, multiple sets of cable straightening shafts 8 can be used to straighten and straighten cable cores of different diameters.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-layer co-extrusion cable core coating molding equipment, characterized in that: The device includes a casing with symmetrically arranged wire feed reels and winding reels on both sides. Inside the casing is a multi-layer co-extrusion die, and a co-extruder is fixedly mounted on the top of the casing. The co-extruder and the multi-layer co-extrusion die are connected via a flow pipe. The multi-layer co-extrusion die is positioned between the wire feed reels and winding reels. Two cable straightening boxes are symmetrically fixedly installed inside the casing, one on each side of the multi-layer co-extrusion die. The two cable straightening boxes have identical internal structures. Multiple rectangular boxes are symmetrically fixedly installed inside each cable straightening box. Each rectangular box contains a detection component that automatically detects whether the cable core has misaligned or bent during cable core transport. The cable straightening box also contains a cable straightening assembly, which includes multiple sets of straightening shafts. When the detection component detects misalignment or bending of the cable core, the cable straightening assembly uses these shafts to adaptively straighten the cable core.

2. The multi-layer co-extrusion cable core coating molding equipment according to claim 1, characterized in that: The cable straightening assembly also includes multiple sets of racks, each with a positioning shaft fixedly installed on its inner wall. The inner walls of the multiple sets of cable straightening shafts are rotatably connected to the outer walls of the multiple positioning shafts. The multiple sets of cable straightening shafts are placed inside the multiple sets of racks, and the annular grooves on the inner walls of the multiple sets of cable straightening shafts can slide against the outer wall of the cable core.

3. The multi-layer co-extrusion cable core coating molding equipment according to claim 2, characterized in that: The cable tray box has multiple sets of trays symmetrically arranged inside. Limiting rods are fixedly installed on the outer walls of the trays. The outer walls of the limiting rods can slide to the inner walls of the trays. The outer walls of the trays slide to the inner walls of the trays. A return spring is provided between the outer walls of the trays and the inner walls of the trays.

4. The multi-layer co-extrusion cable core coating molding equipment according to claim 2, characterized in that: Rectangular blocks are symmetrically fixedly installed on the outer walls of multiple sets of shelves, and multiple guide rods are symmetrically fixedly installed on the inner walls of the cable trays. The inner walls of the multiple rectangular blocks can be slidably connected to the outer walls of the multiple guide rods, and the outer walls of the multiple guide rods are fixedly connected to the inner walls of the multiple rectangular boxes.

5. The multi-layer co-extrusion cable core coating molding equipment according to claim 1, characterized in that: The detection assembly includes two slotted shafts, which are symmetrically fixed inside the rectangular box. A pressure sensor is fixedly installed on the inner wall of the slotted shaft, and a pressure-sensitive spring is installed inside the slotted shaft. A pressure-transmitting diaphragm is fixedly installed at both ends of the pressure-sensitive spring. The top of one pressure-transmitting diaphragm can fit in contact with the outer wall of the pressure sensor, and a pressure-transmitting component is provided between the bottom of the other pressure-transmitting diaphragm and the top of the rectangular block.

6. The multi-layer co-extrusion cable core coating molding equipment according to claim 5, characterized in that: The pressure transmission assembly includes two push rods. The outer walls of the two push rods are slidably connected to the inner walls of the two groove shafts, and the tops of the two push rods can be in contact with the bottoms of the other two pressure transmission diaphragms.

7. The multi-layer co-extrusion cable core coating molding equipment according to claim 5, characterized in that: A shaft is fixedly installed on the inner wall of the rectangular box, and a semi-ring block is fixedly installed on the top of each of the two rectangular blocks. A hinge plate is symmetrically hinged to the outer wall of the shaft. One end of each of the two hinge plates is hinged to one end of each of the two semi-ring blocks. The bottom ends of the two push rods can slide against the tops of the two hinge plates.

8. The multi-layer co-extrusion cable core coating molding equipment according to claim 7, characterized in that: A hanging plate is fixedly installed at the bottom of the shaft, and electromagnets are symmetrically fixedly installed on both sides of the hanging plate. Magnetic blocks are fixedly installed inside the two rectangular blocks, and the two magnetic blocks are respectively set opposite to the two electromagnets.

9. The multi-layer co-extrusion cable core coating molding equipment according to claim 2, characterized in that: The inner wall of the cable winding box is symmetrically fixed with multiple limiting shafts. The outer walls of the multiple limiting shafts can be slidably connected to the inner walls of multiple slot plates. A pressure spring is provided between one side of each slot plate and the inner wall of the cable winding box. Pull rods are symmetrically fixed to the outer walls of each slot plate, and the outer walls of each pull rod are slidably connected to the inner wall of the cable winding box.

10. The multi-layer co-extrusion cable core coating molding equipment according to claim 9, characterized in that: Vertical rods are symmetrically fixedly installed on the outer wall of the cable tray. Telescopic rods are fixedly installed on the outer wall of multiple vertical rods. Pull plates are fixedly installed on the output ends of multiple telescopic rods. One side of each pull plate is fixedly connected to one end of multiple pull rods.

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