Insulation layer extrusion device of cable with cold-resistant insulation layer

Abstract

The invention belongs to the technical field of cable extrusion, and particularly relates to an insulating layer extrusion device for a cable with a cold-resistant insulating layer, the insulating layer extrusion device comprises a forming assembly, an auxiliary assembly is arranged on one side of the forming assembly, a covering assembly is arranged on the other side of the forming assembly, and a cable assembly is in transmission connection with the interior of the covering assembly; the forming assembly comprises a cylinder, a stirring cavity is formed in the cylinder, and a rotating shaft is rotationally connected to the interior of the stirring cavity; the auxiliary assembly comprises a base; the covering assembly comprises a die sleeve, a die core is arranged at the axis of the die sleeve, an annular hole is formed in the die sleeve, one side of the annular hole communicates with a transverse hole, and a discharging hole is formed in the opposite end of the annular hole. The insulating layer extrusion device of the cable with the cold-resistant insulating layer is high in extrusion efficiency, good in extrusion effect, simple to operate, safe and stable, effectively improves the stability and uniformity of an insulating film on the outer surface of a cable core, and ensures the insulation protection effect on the cable core.

Description

Technical Field

[0001] The invention belongs to the technical field of cable extrusion, in particular to an insulation layer extrusion device for a cable with a cold-resistant insulation layer. Background Art

[0002] A preparation method for a cold-resistant cable insulation layer involves ultrasonically oscillating molecular sieves, potassium titanate whiskers, porous starch and water, and then drying to obtain a mixture, then soaking the mixture with di[2-(2-butoxyethoxy)ethyl adipate] and dibutyl adipate, filtering to obtain a cold-resistant additive, and finally mixing and molding natural rubber, polyvinyl chloride and other materials with the cold-resistant additive to obtain a cold-resistant cable insulation layer. The cable insulation layer extrusion device is a key equipment for producing the cable insulation layer. It wraps the plastic insulation material around the conductor by continuous extrusion to form the insulation layer of the cable.

[0003] Chinese invention patent CN115503212A belongs to the field of cable processing technology, and particularly relates to a cable insulation layer extrusion device, including a frame, an extrusion mechanism, a transmission mechanism, a discharge mechanism, a heating and cooling mechanism, a controller and a fault detection device. The frame, the extrusion mechanism, the transmission mechanism, the discharge mechanism and the heating and cooling mechanism constitute the extrusion device; the insulation layer extrusion device has low extrusion efficiency and poor extrusion effect.

[0004] Chinese invention patent CN114603806B discloses a cable insulation layer extrusion device that is easy to cool. The support shell is connected to the feed box, an extrusion feeding mechanism is arranged in the support shell, the upper shell, the lower shell, the first end cover and the second end cover form a chamber, the support shell and the chamber are connected to each other, a rubber outlet cylinder is arranged on the first end cover, and a cable cylinder is arranged in the chamber; the insulation layer extrusion device is difficult to operate and has low operating efficiency.

[0005] When the temperature of the molten plastic itself is different, the thickness of the insulation layer formed after the molten plastic covers the outer surface of the wire core and shrinks and solidifies is different, which will reduce the quality of the subsequent cable with a cold-resistant insulation layer.

[0006] Furthermore, when there are defects on the outer surface of the wire core but the defect value is within the allowable range, the thickness of the molten plastic covering the outer surface of the wire core changes accordingly, and ultimately affects the uniformity of the thickness of the formed insulation layer.

[0007] When the defects on the outer surface of the wire core are too large and exceed the allowable range, the wire core needs to be marked and cut and peeled to prevent the wire core from being covered with molten plastic and forming an insulation layer. However, the existing technology lacks a marking function for rapid detection of this position, which ultimately affects the quality of the entire cable.

[0008] At the same time, there are often bubbles inside the molten plastic. If the bubbles are not dealt with in time, the quality of the insulation layer subsequently formed on the outer surface of the wire core will be reduced. Summary of the invention

[0009] In view of the above problems, the present invention provides an insulation layer extrusion device for a cable with a cold-resistant insulation layer.

[0010] To achieve the above object, the present invention provides the following technical solution: an insulation layer extrusion device for a cable with a cold-resistant insulation layer, comprising a molding component, one side of the molding component is provided with an auxiliary component, the other side of the molding component is provided with a covering component, and the covering component is internally connected with a cable component; The molding assembly comprises a cylinder, a stirring chamber is provided inside the cylinder, and a rotating shaft is rotatably connected inside the stirring chamber; The auxiliary component includes a base; The covering assembly includes a mold sleeve, a mold core is provided at the axis center of the mold sleeve, an annular hole is provided inside the mold sleeve, one side of the annular hole is connected to a transverse hole, an exhaust hole is provided at the opposite end of the annular hole, an L-shaped groove is provided on the side wall of the exhaust hole, a plurality of blocking blocks are sealingly and slidably connected inside the L-shaped groove, a side groove is provided on the inner wall of the L-shaped groove, a fixed plate is provided inside the side groove, an expansion sleeve is provided on one side of the fixed plate, a vent is provided inside the fixed plate, a magnetic plate is slidably connected to the other side of the fixed plate, and a yield plate is slidably connected to one side of the magnetic plate.

[0011] The cable assembly includes multiple wire cores, the mold core is coaxially arranged with the wire core, the outer surface of the wire core is provided with an insulating film, the outer surface of the insulating film is provided with an inner film, a filler is provided between the inner film and the multiple insulating films, the outer surface of the inner film is provided with a shielding film, and the outer surface of the shielding film is provided with a protective film.

[0012] Preferably, the outer surface of the rotating shaft is provided with an auger blade, the outer surface of the auger blade is in contact with the inner wall of the stirring chamber, the interior of the stirring chamber is provided with molten plastic, the interior of the cylinder is evenly provided with a plurality of heating chambers, the interior of the heating chamber is provided with a heat medium, and the inner wall of the heating chamber exchanges heat with the interior of the stirring chamber.

[0013] Preferably, a nozzle is provided at the end of the cylinder, a through hole is opened at the axis center of the nozzle, the through hole is connected with the stirring chamber, a blocking head is provided at the axis center of the through hole, an intermediate tube is provided at the other end of the nozzle through a plurality of splicing rods, a flow hole is provided inside the intermediate tube, a matching head is provided inside the flow hole, a docking hole is connected to the end of the flow hole, the docking hole is connected with the through hole, the inner wall of the docking hole and the outer surface of the nozzle are clamped with each other, a mounting head is provided at the other end of the intermediate tube, an inner hole is provided at the axis center of the mounting head, one end of the inner hole is connected with the flow hole, and the other end of the inner hole is connected with the transverse hole.

[0014] Preferably, a flat seat is provided on one side of the top of the base, a driving motor is provided on the top of the flat seat, an output end of the driving motor is connected to a coupling, an output shaft is provided at the output end of the coupling, the other end of the output shaft is fixedly connected to the end of the rotating shaft, and a controller is provided on one side of the top of the flat seat, and the controller electrically controls each electrical component.

[0015] Preferably, a support rod is provided on one side of the base, and the top of the other side of the support rod is fixedly connected to the bottom of the mold sleeve. A feed hopper is provided on the top of the cylinder, and the bottom output end of the feed hopper is connected to the interior of the stirring chamber. A plurality of clamping rings are evenly provided on the outer surface of the cylinder, and two connecting rods are symmetrically provided on both side walls of the clamping ring, and the bottoms of the plurality of connecting rods are fixedly connected to the top of the base.

[0016] Preferably, the mold core is coaxially arranged with the wire core, the discharge holes are connected with the inside of the mold core on one side close to the mold core, a plurality of bottom grooves are evenly opened on the end of the blocking block away from the mold core, a connecting spring is provided on the inner wall of the bottom groove, a magnetic probe is provided on the other end of the connecting spring, the outer surface of the magnetic probe is sealingly and slidingly connected with the inner wall of the bottom groove, and the magnetic properties of the end faces facing the magnetic probe and the magnetic plate are different.

[0017] Preferably, a follower plate is provided on the side of the blocking block away from the discharge hole, and the side wall of the follower plate is fixedly connected to the end of the expansion sleeve away from the vent hole. A return spring is provided on the side wall of the fixed plate, and the other end of the return spring is fixedly connected to the side wall of the follower plate. The return spring is located inside the expansion sleeve.

[0018] Preferably, a heat expansion material is provided inside the expansion sleeve, the two sides of the vent hole are respectively connected with the inside of the side groove and the inside of the expansion sleeve, a sliding hole is provided inside the magnetic plate, a top block is slidably connected inside the sliding hole, one end of the top block is fixedly connected to the side wall of the give way plate, an elastic reset block is provided between the give way plate and the magnetic plate, and the peripheral side surfaces of the magnetic plate and the give way plate are both sealed and slidably connected with the side groove and the inner wall of the fixed plate.

[0019] Preferably, an elastic connecting block is provided on one side of the magnetic plate, and the other side of the elastic connecting block is fixedly connected to the inner wall of the side groove. A plurality of limiting holes are evenly arranged inside the mold sleeve, and the two sides of the limiting holes are respectively connected with the inside of the side groove and the mold core. A moving rod is sealingly and slidably connected inside the limiting hole, and one end of the moving rod is fixedly connected to the side wall of the magnetic plate, and the other end of the moving rod is provided with a clamping plate, and the other end of the clamping plate matches the outer surface of the wire core.

[0020] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the insulation layer extrusion device of the cable with a cold-resistant insulation layer has high extrusion efficiency, good extrusion effect, simple operation, safety and stability, and can effectively improve the stability and uniformity of the insulation film on the outer surface of the wire core, thereby ensuring the insulation protection effect of the wire core.

[0021] 2. In the present invention, when the temperature of the molten plastic inside the discharge hole changes, the blocking area of ​​the discharge hole by the blocking block is adjusted accordingly, thereby ensuring that the thickness of the insulating film formed by the molten plastic on the outer surface of the wire core after cooling is uniform and stable.

[0022] 3. In the present invention, when there are defects on the outer surface of the wire core, the blocking area of ​​the discharge hole by the blocking block is adjusted accordingly by moving the magnetic plate, and the amount of molten plastic discharged from the discharge hole is adjusted accordingly, thereby ensuring the coverage of the molten plastic at the defective position of the wire core.

[0023] 4. In the present invention, when the outer surface defects of the wire core exceed the preset value range, the blocking block blocks the discharge hole, and the molten plastic is no longer discharged from the discharge hole, thereby achieving accurate standardization of the defect position, ensuring subsequent cutting and crushing of the position, and improving the power-on stability of the wire core.

[0024] 5. In the present invention, the magnetic probe is driven to move continuously in the bottom groove by the reciprocating movement of the magnetic plate and the blocking block. The magnetic probe exerts a vibrating effect on the molten plastic inside the discharge hole, further improving the puncturing effect on the bubbles inside the molten plastic, thereby ensuring the uniformity and tightness of the molten plastic coverage. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the insulation layer extrusion device of the present invention; Figure 2 It is a three-dimensional structural schematic diagram of the insulating layer extrusion device of the present invention from another viewing angle; Figure 3 It is a schematic diagram of the internal three-dimensional structure of the insulation layer extrusion device of the present invention from the front view; Figure 4 for Figure 3 A partial enlarged schematic diagram in the middle; Figure 5It is a three-dimensional structural schematic diagram of a model component in the insulation layer extrusion device of the present invention; Figure 6 It is a schematic diagram of the internal three-dimensional structure of the model component in the insulation layer extrusion device of the present invention as viewed from above; Figure 7 for Figure 6 A partial enlarged schematic diagram of point B in the middle; Figure 8 It is a schematic diagram of the internal three-dimensional structure of the model component in the insulation layer extrusion device of the present invention from the front view; Fig. 9 for Figure 8 A partial enlarged schematic diagram of point C in the middle; Fig.10 It is a schematic diagram of an exploded three-dimensional structure of a model component in the insulating layer extrusion device of the present invention; Fig.11 It is a schematic diagram of the three-dimensional structure of the cable with a cold-resistant insulation layer in the present invention.

[0026] In the figure: 1. Cable assembly; 101. Wire core; 102. Insulating film; 103. Filler; 104. Inner film; 105. Shielding film; 106. Protective film; 2. Forming assembly; 201. Cylinder; 202. Stirring chamber; 203. Rotating shaft; 204. Auger blade; 205. Heating chamber; 206. Blocking head; 207. Nozzle; 208. Through hole; 209. Splicing rod; 210. Intermediate tube; 211. Docking hole; 212. Matching head; 213. Flow hole; 214. Mounting head; 215. Inner hole; 3. Auxiliary assembly; 301. Base; 302. Support rod; 303. Flat seat; 304. Driving motor; 305. Coupling; 306. Output shaft; 307. 7. Controller; 308. Feed hopper; 309. Connecting rod; 310. Snap ring; 4. Cover assembly; 401. Mold sleeve; 402. Mold core; 403. Horizontal hole; 404. Annular hole; 405. Discharge hole; 406. L-shaped groove; 407. Blocking block; 408. Bottom groove; 409. Connecting spring; 410. Magnetic probe; 411. Follow-up plate; 412. Expansion sleeve; 413. Reset spring; 414. Side groove; 415. Fixed plate; 416. Vent hole; 417. Sliding hole; 418. Magnetic plate; 419. Elastic connecting block; 420. Limiting hole; 421. Moving rod; 422. Clamp; 423. Give way plate; 424. Top block; 425. Elastic reset block. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0028] like Figure 1-11 As shown, an insulation layer extrusion device for a cable with a cold-resistant insulation layer, the insulation layer extrusion device is used to cover the outer surface of the cable with a cold-resistant insulation layer with an insulation layer, including a molding component 2, the molding component 2 heats the raw material to form a molten state, one side of the molding component 2 is provided with an auxiliary component 3, the auxiliary component 3 cooperates with the molding component 2 to improve the heating efficiency, the other side of the molding component 2 is provided with a covering component 4, the covering component 4 is internally transmitted and connected with a cable component 1, the molten plastic enters the covering component 4 along the molding component 2 and wraps and covers the outer surface of the wire core 101, thereby forming the required insulating film 102.

[0029] The cable assembly 1 includes multiple cores 101, which transmit power. An insulating film 102 is provided on the outer surface of the core 101, which wraps the core 101 for protection. An inner film 104 is provided on the outer surface of the insulating film 102. A filler 103 is provided between the inner film 104 and the multiple insulating films 102. The filler 103 fills and protects the multiple cores 101 and the insulating film 102, further improving the support and stability of the cable assembly 1. A shielding film 105 is provided on the outer surface of the inner film 104, which magnetically shields the multiple cores 101 inside to prevent external magnetic forces from affecting the normal transmission of the core 101. A protective film 106 is provided on the outer surface of the shielding film 105. The protective film 106 serves as the outermost layer of protection structure to further improve the durability and resistance of the internal core 101.

[0030] The molding component 2 includes a cylinder 201, a stirring chamber 202 is opened inside the cylinder 201, and molten plastic is arranged inside the stirring chamber 202, that is, the plastic raw material is continuously transmitted inside the stirring chamber 202 and is heated and melted at high temperature. A rotating shaft 203 is rotatably connected inside the stirring chamber 202, and an auger blade 204 is arranged on the outer surface of the rotating shaft 203. The outer surface of the auger blade 204 is in contact with the inner wall of the stirring chamber 202. The rotation of the rotating shaft 203 drives the auger blade 204 to rotate, and the auger blade 204 rotates inside the stirring chamber 202 and realizes the transmission of the molten plastic.

[0031] A plurality of heating chambers 205 are evenly arranged inside the cylinder 201. Heat medium is arranged inside the heating chambers 205. The temperatures inside the plurality of heating chambers 205 are different. The inner wall of the heating chamber 205 exchanges heat with the inside of the stirring chamber 202. This arrangement further improves the uniformity and efficiency of heating the plastic raw material inside the stirring chamber 202 by the heating chamber 205, thereby ensuring that the plastic raw material is heated to the desired molten state.

[0032] A nozzle 207 is provided at the end of the cylinder 201. A through hole 208 is provided at the axis of the nozzle 207. The through hole 208 is connected to the stirring chamber 202. The molten plastic formed by heating enters the through hole 208 for circulation. A blocking head 206 is provided at the axis of the through hole 208. The blocking head 206 blocks the molten plastic to ensure the ejection rate of the molten plastic and the stability of the flow. The other end of the nozzle 207 is provided with an intermediate tube 210 through a plurality of splicing rods 209. The intermediate tube 210 performs an intermediate splicing function. A flow hole 213 is provided inside the intermediate tube 210. The end of the flow hole 213 is connected to a docking hole 211. The docking hole 211 is connected to the through hole 208, and the molten plastic inside the through hole 208 continues to enter the docking hole 2 11 and the flow hole 213 are circulated, the inner wall of the docking hole 211 is clamped with the outer surface of the nozzle 207, the setting of the docking hole 211 improves the clamping stability of the nozzle 207, the other end of the intermediate tube 210 is provided with a mounting head 214, the axis of the mounting head 214 is provided with an inner hole 215, one end of the inner hole 215 is connected with the flow hole 213, the flow hole 213 is provided with a matching head 212, the matching head 212 properly blocks the molten plastic inside the flow hole 213 to ensure the flow stability of the molten plastic, the other end of the inner hole 215 is connected with the transverse hole 403, the molten plastic inside the flow hole 213 enters the inner hole 215, and finally enters the transverse hole 403 to circulate and form the required insulating film 102.

[0033] The auxiliary component 3 includes a base 301, and a flat seat 303 is provided on one side of the top of the base 301. The setting of the flat seat 303 improves the splicing stability. A driving motor 304 is provided on the top of the flat seat 303. The output end of the driving motor 304 is connected to a coupling 305. The output end of the coupling 305 is provided with an output shaft 306. The other end of the output shaft 306 is fixedly connected to the end of the rotating shaft 203. The driving motor 304 is started and rotated through the coupling 305. The coupling 305 drives the output shaft 306 to rotate. The output shaft 306 drives the rotating shaft 203 to rotate. The rotating shaft 203 drives the auger blade 204 to rotate inside the stirring chamber 202, thereby further realizing the transmission of the speed of the raw materials inside the stirring chamber 202 and heating to form a molten state. A controller 307 is provided on one side of the top of the flat seat 303. The controller 307 electrically controls each electrical component.

[0034] A support rod 302 is provided on one side of the base 301, and the top of the other side of the support rod 302 is fixedly connected to the bottom of the mold sleeve 401. The setting of the support rod 302 improves the support of the mold sleeve 401. A feed hopper 308 is provided on the top of the cylinder 201, and the bottom output end of the feed hopper 308 is connected to the inside of the stirring chamber 202. Plastic raw materials are added to the inside of the feed hopper 308, and the plastic raw materials continue to flow downward into the stirring chamber 202. A plurality of clamping rings 310 are evenly provided on the outer surface of the cylinder 201, and two connecting rods 309 are symmetrically provided on both side walls of the clamping ring 310. The bottoms of the plurality of connecting rods 309 are fixedly connected to the top of the base 301. The clamping ring 310 and the connecting rod 309 cooperate with each other to improve the support and stability of the cylinder 201.

[0035] The covering component 4 includes a mold sleeve 401, and a mold core 402 is opened at the axis center of the mold sleeve 401. The mold core 402 is coaxially arranged with the wire core 101. The wire core 101 moves along the mold core 402 and covers the required insulating film 102 on the outer surface of the wire core 101. An annular hole 404 is opened inside the mold sleeve 401, and a transverse hole 403 is connected to one side of the annular hole 404. The molten plastic inside the transverse hole 403 fills the inside of the annular hole 404. A discharge hole 405 is opened at the end of the annular hole 404. The discharge hole 405 is connected to the inside of the mold core 402 on one side close to the mold core 402. The molten plastic inside the annular hole 404 is discharged along the discharge hole 405, thereby achieving a wrapping and covering effect on the wire core 101 inside the mold core 402.

[0036] An L-shaped groove 406 is provided on the side wall of the discharge hole 405, and a plurality of blocking blocks 407 are sealed and slidably connected inside the L-shaped groove 406. Adjacent blocking blocks 407 are sealed and slidably connected, so the plurality of blocking blocks 407 divide the discharge hole 405, further realizing the adjustment of the discharge amount of the molten plastic discharged from the discharge holes 405 at different positions, thereby ensuring the quality of the insulating film 102. A plurality of bottom grooves 408 are evenly provided on the end of the blocking block 407 away from the mold core 402, and a connecting spring 409 is provided on the inner wall of the bottom groove 408, and a magnetic probe 410 is provided on the other end of the connecting spring 409. The setting of the connecting spring 409 further improves the elastic reset effect of the magnetic probe 410, and the outer surface of the magnetic probe 410 is sealed and slidably connected to the inner wall of the bottom groove 408. When the magnetic probe 410 moves back and forth inside the bottom groove 408, the magnetic probe 410 vibrates and crushes the flowing molten plastic inside the discharge hole 405, further improving the crushing effect of the bubbles inside the discharge hole 405.

[0037] The inner wall of the L-shaped groove 406 is provided with a side groove 414, and a fixing plate 415 is provided inside the side groove 414. An expansion sleeve 412 is provided on one side of the fixing plate 415. A heat expansion material is provided inside the expansion sleeve 412. That is, when the temperature of the molten plastic inside the discharge hole 405 increases, the heat expansion material expands correspondingly due to the heat and drives the end of the expansion sleeve 412 to expand. A follower plate 411 is provided on the side of the blocking block 407 away from the discharge hole 405. When the follower plate 411 moves, it drives the blocking block 407 to move synchronously. The side wall of the follower plate 411 is fixedly connected to the end of the expansion sleeve 412 away from the vent hole 416. Correspondingly, when the expansion sleeve 412 is expanded, the expansion sleeve 412 is provided with a heat expansion material. When the expansion sleeve 412 expands, the expansion sleeve 412 drives the follower plate 411 to move away from the discharge hole 405, and the follower plate 411 drives the blocking block 407 to move. The blocking area of ​​the discharge hole 405 by the blocking block 407 is reduced, thereby increasing the amount of molten plastic discharged from the discharge hole 405. The side wall of the fixed plate 415 is provided with a return spring 413, and the other end of the return spring 413 is fixedly connected to the side wall of the follower plate 411. The return spring 413 is located inside the expansion sleeve 412. The setting of the return spring 413 further improves the elastic return performance of the follower plate 411, thereby ensuring the stability of the reciprocating movement of the follower plate 411.

[0038] The interior of the fixed plate 415 is provided with a vent hole 416, and the two sides of the vent hole 416 are respectively connected to the interior of the side groove 414 and the interior of the expansion sleeve 412, thereby realizing the continuous flow of the heat expansion material in the side groove 414 and the expansion sleeve 412. A magnetic plate 418 is provided on the other side of the vent hole 416, and a clearance plate 423 is slidably connected to one side of the magnetic plate 418. The peripheral side surfaces of the magnetic plate 418 and the clearance plate 423 are sealed and slidably connected to the inner wall of the side groove 414 and the fixed plate 415. When the magnetic plate 418 moves up and down, it applies pressure to the heat expansion material in the side groove 414, thereby realizing the heat expansion. The material continuously flows along the vent hole 416 between the inside of the side groove 414 and the inside of the expansion sleeve 412. A sliding hole 417 is provided inside the magnetic plate 418. A top block 424 is slidably connected inside the sliding hole 417. One end of the top block 424 is fixedly connected to the side wall of the give-way plate 423. When the top block 424 and the inner wall of the side groove 414 are squeezed and contacted with each other, the top block 424 drives the give-way plate 423 to move away from the end of the magnetic plate 418. An elastic reset block 425 is provided between the give-way plate 423 and the magnetic plate 418. The setting of the elastic reset block 425 further realizes the elastic reset effect of the give-way plate 423.

[0039] An elastic connecting block 419 is provided on one side of the magnetic plate 418, and the other side of the elastic connecting block 419 is fixedly connected to the inner wall of the side groove 414. The setting of the elastic connecting block 419 realizes the elastic reset performance of the magnetic plate 418. The magnetic properties of the magnetic probe 410 and the facing end faces of the magnetic plate 418 are different. When the magnetic plate 418 moves back and forth, the magnetic attraction of the magnetic plate 418 and the magnetic probe 410 drives the magnetic probe 410 to move back and forth, further improving the vibration and bubble removal function of the magnetic probe 410 on the molten plastic inside the discharge hole 405.

[0040] The interior of the mold sleeve 401 is evenly provided with a plurality of limiting holes 420, and the two sides of the limiting holes 420 are respectively connected to the side grooves 414 and the interior of the mold core 402, and the interior of the limiting holes 420 is sealed and slidably connected with a moving rod 421, and the limiting holes 420 limit and fix the moving rod 421 so that the moving rod 421 can only reciprocate inside the limiting holes 420, and one end of the moving rod 421 is fixedly connected to the side wall of the magnetic plate 418, and the other end of the moving rod 421 is provided with a clamping plate 422, and the other end of the clamping plate 422 matches the outer surface of the wire core 101, and the plurality of clamping plates 422 are connected to the wire core 101. The outer surface of the core 101 is clamped and fixed, thereby improving the stability and synchronization of the transmission of the core 101, and when there are defects on the outer surface of the core 101, the core 101 is squeezed and contacted with the clamp 422 and correspondingly drives the clamp 422 to move, and the clamp 422 drives the magnetic plate 418 to move through the moving rod 421, and the magnetic plate 418 is wedge-fitted with the sliding hole 417 inside the vent 416 and adjusts the blocking amount of the discharge hole 405 by the blocking block 407, thereby ensuring the controllability of the discharge amount of the molten plastic inside the discharge hole 405 and achieving the uniformity of the insulating film 102 on the outer surface of the core 101.

[0041] When the temperature of the molten plastic inside the discharge hole 405 is different, the thickness of the insulating film 102 formed after the molten plastic covers the outer surface of the core 101 and shrinks and solidifies is different, which will reduce the quality of the subsequent cable with a cold-resistant insulating layer; and when there are defects on the outer surface of the core 101 but within the allowable range, the thickness of the molten plastic covering the outer surface of the core 101 along the discharge hole 405 changes accordingly, and ultimately affects the uniformity of the thickness of the formed insulating film 102; when the defects on the outer surface of the core 101 are too large and exceed the allowable range, the core 101 needs to be marked and peeled off to prevent the core 101 from being covered with molten plastic, but the prior art lacks a marking function for rapid detection of this position, which ultimately affects the quality of the entire cable; at the same time, the molten plastic flowing inside the discharge hole 405 often contains bubbles, etc. If the bubbles cannot be dealt with in time, the quality of the insulating film 102 formed on the outer surface of the core 101 will be reduced.

[0042] In order to solve the above problems, when the insulation layer extrusion device of the cable with a cold-resistant insulation layer is actually used, the wire core 101 is first passed through the mold core 402 with the help of a traction mechanism, and the outer surface of the wire core 101 is clamped and fixed by multiple clamps 422, thereby improving the stability and efficiency of the wire core 101 passing through, and multiple elastic connecting blocks 419 apply elastic force to the magnetic plate 418, and the magnetic plate 418 applies elastic force to the clamp 422 through the moving rod 421, and the multiple clamps 422 elastically clamp the outer surface of the wire core 101, further improving the support and coaxiality of the wire core 101, avoiding the shaking of the wire core 101 inside the mold core 402 and reducing the uniformity and synchronization of the subsequent covering of the molten plastic.

[0043] At the same time, the plastic raw material is placed inside the feed hopper 308, and the plastic raw material inside the feed hopper 308 flows downward into the stirring chamber 202. At the same time, the controller 307 controls the drive motor 304 to start, and the output end of the drive motor 304 drives the output shaft 306 to rotate through the coupling 305, and the output shaft 306 drives the rotating shaft 203 to rotate, and the rotating shaft 203 drives multiple auger blades 204 to rotate inside the stirring chamber 202. The auger blades 204 push the plastic raw material inside the stirring chamber 202 to drive the plastic raw material to continuously move toward the mold sleeve 401 end, and heat medium is introduced into the multiple heating chambers 205. The heat medium and the stirring chamber 202 perform efficient heat exchange, so that the plastic raw material inside the stirring chamber 202 continuously forms molten plastic under heating, thereby ensuring the uniformity and fluidity of the subsequent outer surface coverage of the core 101.

[0044] The molten plastic reaches the end of the nozzle 207, and under the blocking effect of the blocking head 206, the molten plastic enters the flow hole 213 along the through hole 208, and enters the inner hole 215 along the flow hole 213, and finally enters the transverse hole 403 inside the mold sleeve 401 along the inner hole 215. At this time, under the guidance of the transverse hole 403, the molten plastic fills the annular hole 404. At the same time, because the temperature of the molten plastic inside the discharge hole 405 is higher than the room temperature, the thermal expansion material inside the expansion sleeve 412 expands due to the heat and stretches the reset spring 413 to drive the follower plate 411 to move away from the discharge hole 405, and the clamping plate 422 evenly clamps the outer surface of the wire core 101, and the clamping plate 422 passes The moving rod 421 drives the magnetic plate 418 to be in a stable position, and the follower plate 411 drives the blocking block 407 to be in a stable position. The blocking block 407 partially blocks the discharge hole 405. Finally, the molten plastic is discharged along the discharge hole 405 at the end of the ring hole 404 and covers the outer surface of the wire core 101 to form the required insulating film 102, thereby completing the extrusion process of the insulating layer. The magnetic probe 410 squeezes the connecting spring 409 under the magnetic attraction of the magnetic plate 418 and is in a stable position inside the bottom groove 408. The molten plastic flowing inside the discharge hole 405 is efficiently removed from the internal bubbles under the piercing action of the magnetic probe 410, thereby ensuring the density and uniformity of the molten plastic.

[0045] When the temperature of the molten plastic inside the discharge hole 405 drops, and if the amount of molten plastic discharged from the discharge hole 405 is the same, since the temperature of the insulating film 102 on the outer surface of the core 101 is the same after cooling, the temperature drop of the molten plastic decreases. Correspondingly, under the principle of thermal expansion and contraction of the molten plastic itself, the thickness difference of the insulating film 102 formed by the molten plastic after cooling decreases. Therefore, the thickness of the insulating film 102 finally formed on the outer surface of the core 101 increases.

[0046] When the temperature of the molten plastic inside the discharge hole 405 drops, the volume of the heat-expanding material inside the expansion sleeve 412 decreases according to the principle of thermal expansion and contraction, and the follower plate 411 is driven to move toward the end of the discharge hole 405 under the elastic force of the return spring 413. The follower plate 411 drives the blocking block 407 to move toward the end of the discharge hole 405 inside the L-shaped groove 406. The blocking amount of the discharge hole 405 by the blocking block 407 increases, and the flow rate of the molten plastic inside the annular hole 404 discharged along the discharge hole 405 to the outer surface of the wire core 101 is reduced, thereby ensuring that the thickness of the insulating film 102 formed on the outer surface of the wire core 101 after the molten plastic with reduced temperature is cooled meets the requirements, thereby improving the uniformity and wrapping of the insulating film 102.

[0047] At the same time, when the follower plate 411 drives the blocking block 407 to move in the L-shaped groove 406 toward the end of the discharge hole 405, the blocking area of ​​the discharge hole 405 by the blocking block 407 increases, and the molten plastic in the discharge hole 405 impacts the blocking block 407 and the amount of bubbles generated increases, and the blocking block 407 drives the magnetic probe 410 in the bottom groove 408 to move synchronously, and the distance between the magnetic probe 410 and the magnetic plate 418 increases, and the magnetic attraction force exerted by the magnetic plate 418 on the magnetic probe 410 decreases, and the magnetic probe 410 is driven to move away from the end of the magnetic plate 418 under the elastic force of the return spring 413, and the magnetic probe 410 moves outward along the bottom groove 408, and the extension distance of the magnetic probe 410 in the bottom groove 408 increases, thereby improving the puncturing effect of the magnetic probe 410 on the bubbles in the molten plastic in the discharge hole 405, ensuring the uniformity and tightness of the flow of the molten plastic, and correspondingly improving the quality of the subsequent covering of the insulating film 102 on the outer surface of the core 101.

[0048] Similarly, when the temperature inside the discharge hole 405 rises, the volume of the thermal expansion material inside the expansion sleeve 412 increases and drives the follower plate 411 to move away from the discharge hole 405. The follower plate 411 correspondingly drives the blocking block 407 to move, and the blocking area of ​​the discharge hole 405 by the blocking block 407 decreases. The amount of molten plastic discharged from the discharge hole 405 to the outer surface of the inner wire core 101 of the mold core 402 increases, thereby ensuring that the thickness of the insulating film 102 formed by the molten plastic after cooling is uniform and meets the requirements. At the same time, when the blocking block 407 moves, it brings The magnetic probe 410 inside the movable bottom groove 408 moves, and the distance between the magnetic probe 410 and the magnetic plate 418 decreases. The magnetic probe 410 is attracted by the magnetic plate 418, and the magnetic probe 410 is squeezed along the bottom groove 408 to connect the spring 409 and moves toward the end of the magnetic plate 418. The distance that the magnetic probe 410 extends along the bottom groove 408 decreases, thereby reducing the discharge rate of the molten plastic inside the discharge hole 405 by the magnetic probe 410. While ensuring the stable discharge of the molten plastic, the reciprocating vibration and puncturing effect on the bubbles inside the molten plastic is improved.

[0049] When there are defects on the outer surface of the wire core 101 and the defect value is less than the preset defect value, the size of the outer surface of the wire core 101 changes. Covering the outer surface of the wire core 101 with the same amount of molten plastic will cause the thickness of that position to change, which will directly affect the quality of the subsequent insulating film 102.

[0050] That is, when there is a protrusion on the outer surface of the wire core 101 and the protrusion is smaller than the preset value, the protrusion moves with the wire core 101 to the end of the clamping plate 422, the wire core 101 and the clamping plate 422 are pressed and contacted with each other and drive the clamping plate 422 to move away from the end of the wire core 101, the clamping plate 422 drives the magnetic plate 418 to press the elastic connecting block 419 and move away from the end of the wire core 101 through the moving rod 421, and the magnetic plate 418 applies a thrust to the thermal expansion material inside the side groove 414, so that the thermal expansion material inside the side groove 414 enters the expansion sleeve 41 along the vent hole 416 2, the amount of thermal expansion material inside the expansion sleeve 412 increases and drives the volume of the expansion sleeve 412 to increase. The expansion sleeve 412 drives the blocking block 407 to move synchronously away from the discharge hole 405 through the follower plate 411, and the blocking area of ​​the discharge hole 405 by the blocking block 407 decreases. The amount of molten plastic discharged from the discharge hole 405 increases, thereby increasing the coverage of the molten plastic on the protruding position, ensuring that the molten plastic at the protruding position can still form an insulating film 102 of the same thickness after cooling, thereby improving the insulation coverage effect on the outer surface of the wire core 101.

[0051] At the same time, when the follower plate 411 drives the blocking block 407 to move away from the discharge hole 405, it also drives the magnetic probe 410 to move synchronously, and the magnetic plate 418 moves away from the wire core 101. Then, the distance between the magnetic probe 410 and the magnetic plate 418 decreases, and the magnetic attraction force exerted by the magnetic plate 418 on the magnetic probe 410 increases. Under the action of the magnetic attraction force, the magnetic probe 410 squeezes the connecting spring 409 along the bottom groove 408 and moves toward the end of the magnetic plate 418. The extension distance of the magnetic probe 410 along the bottom groove 408 decreases, thereby ensuring the discharge stability of the molten plastic inside the discharge hole 405.

[0052] Similarly, when there is an indentation on the outer surface of the wire core 101 and the indentation value is less than the preset value, the area of ​​the wire core 101 at this position is synchronously reduced, and the wire core 101 drives the indentation to reach the clamping plate 422, and the magnetic plate 418 is driven to move toward the end of the wire core 101 under the elastic force of the elastic connecting block 419, and the clamping plate 422 is driven to move toward the end of the wire core 101 through the magnetic plate 418 and the moving rod 421. The clamping plate 422 and the indentation of the wire core 101 are still tightly fitted, and at the same time, the magnetic plate 418 moves toward the end of the wire core 101 in the side groove 414, and the side The negative pressure inside the groove 414 increases, and the thermal expansion material inside the expansion sleeve 412 flows back to the inside of the side groove 414 along the vent 416. The volume of the expansion sleeve 412 decreases, and the expansion sleeve 412 drives the follower plate 411 and the blocking block 407 to move toward the end close to the discharge hole 405. At this time, the blocking area of ​​the discharge hole 405 by the blocking block 407 increases, and the amount of molten plastic discharged from the discharge hole 405 decreases synchronously, thereby ensuring that the molten plastic can fill the depression on the outer surface of the core 101, and finally the thickness of the insulating film 102 formed by cooling meets the requirements.

[0053] At the same time, when the blocking block 407 moves toward the end close to the discharge hole 405 along with the follower plate 411, the blocking block 407 synchronously drives the magnetic probe 410 to move, and the magnetic plate 418 moves toward the end close to the wire core 101, the distance between the magnetic plate 418 and the magnetic probe 410 increases, and the magnetic attraction force on the magnetic probe 410 decreases. Under the elastic force of the connecting spring 409, the magnetic probe 410 is driven to move outward along the bottom groove 408, and the distance that the magnetic probe 410 extends inside the bottom groove 408 increases, thereby further improving the vibration and puncturing effect of the magnetic probe 410 on the bubbles in the molten plastic inside the discharge hole 405, thereby ensuring the flow stability and uniformity of the molten plastic.

[0054] When the defects on the outer surface of the wire core 101 are too large and greater than the preset value, even if the outer surface of the wire core 101 is covered with molten plastic, the insulating film 102 formed subsequently still cannot insulate and protect the wire core 101. The wire core 101 at this position needs to be marked and distinguished to facilitate subsequent cutting and peeling of this part.

[0055] When the outer surface of the wire core 101 protrudes too large, the protrusion on the outer surface of the wire core 101 and the clamping plate 422 are pressed and contacted with each other and drive the clamping plate 422 to move away from the end of the wire core 101. The clamping plate 422 drives the magnetic plate 418 to move away from the end of the wire core 101 through the moving rod 421. The magnetic plate 418 applies a thrust to the expansion material inside the side groove 414 and makes it continuously enter the expansion sleeve 412 along the vent 416. When the magnetic plate 418 moves to the end of the vent 416, the top block 424 and the inner wall of the side groove 414 are pressed and contacted with each other. As the magnetic plate 418 continues to move away from the end of the wire core 101, the vent 416 is separated from the side wall of the magnetic plate 418 and the inner wall end of the side groove 414, and is connected with the magnetic plate 418 and the give way plate 423. As the top block 424 and the inner wall of the side groove 414 squeeze and contact each other, the yield plate 423 is driven to stretch the elastic reset block 425 to move away from the magnetic plate 418 end, and the distance between the yield plate 423 and the magnetic plate 418 increases, the thermal expansion material inside the expansion sleeve 412 flows back along the vent 416 to between the yield plate 423 and the magnetic plate 418, and the volume of the expansion sleeve 412 continues to decrease, and the expansion sleeve 412 drives the follower plate 411 and the blocking block 407 to move to the maximum distance close to the discharge hole 405 end, and the blocking block 407 blocks the discharge hole 405, and no molten plastic is discharged from the discharge hole 405. The raised position on the outer surface of the wire core 101 is no longer covered with the molten plastic, so that the position is prominently marked, which is convenient for subsequent cutting and peeling.

[0056] After the protrusion on the outer surface of the wire core 101 moves continuously and separates from the clamping plate 422, the elastic force of the elastic connecting block 419 drives the magnetic plate 418 to move in the opposite direction to restore to its original position. At this time, the top block 424 is continuously separated from the extrusion contact with the inner wall of the side groove 414, and the elastic force of the elastic reset block 425 drives the yield plate 423 to move closer to the end of the magnetic plate 418. The distance between the yield plate 423 and the magnetic plate 418 is continuously reduced, and the internal thermal expansion material continuously enters the expansion sleeve 412 along the vent hole 416. Inside, the volume of the expansion sleeve 412 continues to increase. When the magnetic plate 418 moves in the opposite direction and reaches the end of the vent 416, the volume of the expansion sleeve 412 returns to its initial value. At this time, as the magnetic plate 418 continues to move in the opposite direction and makes the vent 416 connected with the end of the magnetic plate 418 and the inner wall of the side groove 414, the expansion sleeve 412 synchronously drives the follower plate 411 and the blocking block 407 to move to the initial value, and the blocking amount of the discharge hole 405 by the blocking block 407 returns to the initial value, thereby restoring the initial working state.

[0057] Similarly, when the depression on the outer surface of the wire core 101 is too large and greater than the preset value, the depression on the outer surface of the wire core 101 is squeezed and contacted with the clamping plate 422 and drives the clamping plate 422 to move toward the end of the wire core 101. The clamping plate 422 drives the magnetic plate 418 to move toward the end of the wire core 101 through the moving rod 421. The distance between the magnetic plate 418 and the inner wall of the side groove 414 increases and the pressure decreases. The thermal expansion material inside the expansion sleeve 412 flows back along the vent 416 to between the side groove 414 and the magnetic plate 418. The volume of the expansion sleeve 412 decreases, and the expansion sleeve 412 drives the follower plate 411 and the blocking block 407 to move toward the end close to the discharge hole 405 to the maximum distance. The blocking block 407 blocks the discharge hole 405, and no molten plastic is discharged from the discharge hole 405. As a result, the depressed position on the outer surface of the wire core 101 is no longer covered with molten plastic.

[0058] When the depressed position is separated from the squeeze contact with the clamp 422 as the wire core 101 continues to move, the clamp 422 moves in the opposite direction and drives the magnetic plate 418 to move to the initial position away from the end of the wire core 101 through the moving rod 421, and the magnetic plate 418 pushes the hot expanded gas inside the side groove 414 into the expansion sleeve 412 along the vent 416, and the volume of the expansion sleeve 412 is restored to the initial value, and the expansion sleeve 412 simultaneously drives the follower plate 411 and the blocking block 407 to move to the initial value, and the blocking amount of the discharge hole 405 by the blocking block 407 is restored to the initial value.

[0059] When the follower plate 411 drives the blocking block 407 to move to the maximum value near the discharge hole 405 and blocks the discharge hole 405, the distance between the magnetic plate 418 and the magnetic probe 410 reaches the maximum value, and the magnetic attraction exerted by the magnetic plate 418 on the magnetic probe 410 reaches the minimum value. Under the elastic force of the connecting spring 409, the magnetic probe 410 is driven to extend the longest distance along the bottom groove 408, and then the inner wall of the discharge hole 405 is scraped and blocked with the help of the magnetic probe 410, thereby ensuring the cleaning effect and blocking effect of the inner wall of the discharge hole 405, avoiding the discharge of molten plastic from the discharge hole 405 and reducing the subsequent marking reminder effect on the outer surface of the wire core 101.

[0060] The above process is then repeated to extrude and cover the subsequent wire cores 101 with the insulation layer.

[0061] The insulation layer extrusion device of the cable with cold-resistant insulation layer has high extrusion efficiency, good extrusion effect, simple operation, safety and stability, and effectively improves the stability and uniformity of the insulation film 102 on the outer surface of the wire core 101, and improves the insulation protection effect of the wire core 101; at the same time, when the temperature of the molten plastic inside the discharge hole 405 changes, the blocking area of ​​the discharge hole 405 by the blocking block 407 is correspondingly adjusted, so as to ensure that the thickness of the insulation film 102 formed by the molten plastic on the outer surface of the wire core 101 after cooling is uniform and stable; and when there is a change in the temperature of the molten plastic inside the discharge hole 405, the molten plastic on the outer surface of the wire core 101 is uniform and stable. When a defect occurs, the blocking area of ​​the discharge hole 405 by the blocking block 407 is adjusted accordingly by means of the movement of the magnetic plate 418, and the amount of molten plastic discharged from the discharge hole 405 is adjusted accordingly, so as to ensure the coverage of the defective position of the wire core 101 by the molten plastic; and when the defect on the outer surface of the wire core 101 exceeds the preset value range, the blocking block 407 blocks the discharge hole 405, and the molten plastic is no longer discharged from the discharge hole 405, thereby achieving an accurate standard for the defective position, ensuring the subsequent cutting and crushing of the position, and improving the power-on stability of the wire core 101.

[0062] 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.

[0063] 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. An insulation layer extrusion device for a cable having a cold-resistant insulation layer, characterized in that: It comprises a forming component (2), an auxiliary component (3) is provided on one side of the forming component (2), a covering component (4) is provided on the other side of the forming component (2), and a cable component (1) is transportably connected inside the covering component (4); The forming assembly (2) comprises a cylinder (201), a stirring chamber (202) is provided inside the cylinder (201), and a rotating shaft (203) is rotatably connected inside the stirring chamber (202); The auxiliary component (3) comprises a base (301); The covering component (4) comprises a mold sleeve (401), a mold core (402) is provided at the axis of the mold sleeve (401), an annular hole (404) is provided inside the mold sleeve (401), one side of the annular hole (404) is connected to a transverse hole (403), a discharge hole (405) is provided at the opposite end of the annular hole (404), an L-shaped groove (406) is provided on the side wall of the discharge hole (405), and a sealing and sliding connection is provided inside the L-shaped groove (406). A plurality of blocking blocks (407) are provided, the inner wall of the L-shaped groove (406) is provided with a side groove (414), a fixing plate (415) is provided inside the side groove (414), an expansion sleeve (412) is provided on one side of the fixing plate (415), a vent hole (416) is provided inside the fixing plate (415), a magnetic plate (418) is slidably connected to the other side of the fixing plate (415), and a clearance plate (423) is slidably connected to one side of the magnetic plate (418).

2. The insulation layer extrusion device of a cable with a cold-resistant insulation layer according to claim 1, characterized in that: The cable assembly (1) comprises a plurality of wire cores (101), the mold core (402) is coaxially arranged with the wire core (101), an insulating film (102) is provided on the outer surface of the wire core (101), an inner film (104) is provided on the outer surface of the insulating film (102), a filler (103) is provided between the inner film (104) and the plurality of insulating films (102), a shielding film (105) is provided on the outer surface of the inner film (104), and a protective film (106) is provided on the outer surface of the shielding film (105).

3. The insulation layer extrusion device of a cable with a cold-resistant insulation layer according to claim 1, characterized in that: The outer surface of the rotating shaft (203) is provided with an auger blade (204), the outer surface of the auger blade (204) is in contact with the inner wall of the stirring chamber (202), the interior of the stirring chamber (202) is provided with molten plastic, a plurality of heating chambers (205) are evenly arranged inside the cylinder (201), a heat medium is provided inside the heating chamber (205), and the inner wall of the heating chamber (205) and the interior of the stirring chamber (202) are in heat exchange with each other.

4. The insulation layer extrusion device for a cable having a cold-resistant insulation layer according to claim 1, characterized in that: A nozzle (207) is provided at the end of the cylinder (201), a through hole (208) is provided at the axis of the nozzle (207), the through hole (208) is connected to the stirring chamber (202), a blocking head (206) is provided at the axis of the through hole (208), an intermediate tube (210) is provided at the other end of the nozzle (207) via a plurality of splicing rods (209), a flow hole (213) is provided inside the intermediate tube (210), and a matching head (212) is provided inside the flow hole (213). The end of the flow hole (213) is connected to a docking hole (211), the docking hole (211) is connected to the through hole (208), the inner wall of the docking hole (211) is mutually clamped with the outer surface of the nozzle (207), the other end of the intermediate tube (210) is provided with a mounting head (214), the axis of the mounting head (214) is provided with an inner hole (215), one end of the inner hole (215) is connected to the flow hole (213), and the other end of the inner hole (215) is connected to the transverse hole (403).

5. The insulation layer extrusion device of a cable with a cold-resistant insulation layer according to claim 1, characterized in that: A flat seat (303) is provided on one side of the top of the base (301), a driving motor (304) is provided on the top of the flat seat (303), an output end of the driving motor (304) is connected to a coupling (305), an output end of the coupling (305) is provided with an output shaft (306), the other end of the output shaft (306) is fixedly connected to the end of the rotating shaft (203), and a controller (307) is provided on one side of the top of the flat seat (303), and the controller (307) electrically controls various electrical components.

6. The insulation layer extrusion device of a cable with a cold-resistant insulation layer according to claim 1, characterized in that: A support rod (302) is provided on one side of the base (301), and the top of the other side of the support rod (302) is fixedly connected to the bottom of the mold sleeve (401). A feed hopper (308) is provided on the top of the cylinder (201), and the bottom output end of the feed hopper (308) is connected to the inside of the stirring chamber (202). A plurality of clamping rings (310) are evenly provided on the outer surface of the cylinder (201), and two connecting rods (309) are symmetrically provided on both side walls of the clamping ring (310), and the bottoms of the plurality of connecting rods (309) are fixedly connected to the top of the base (301).

7. The insulation layer extrusion device of a cable with a cold-resistant insulation layer according to claim 1, characterized in that: The side of the discharge hole (405) close to the mold core (402) is connected to the inside of the mold core (402), and the end of the blocking block (407) away from the mold core (402) is evenly provided with a plurality of bottom grooves (408), the inner wall of the bottom groove (408) is provided with a connecting spring (409), and the other end of the connecting spring (409) is provided with a magnetic probe (410), the outer surface of the magnetic probe (410) is sealed and slidably connected to the inner wall of the bottom groove (408), and the magnetic properties of the end faces facing each other of the magnetic probe (410) and the magnetic plate (418) are different.

8. The insulation layer extrusion device for a cable having a cold-resistant insulation layer according to claim 1, characterized in that: A follower plate (411) is provided on the side of the blocking block (407) away from the discharge hole (405); a side wall of the follower plate (411) is fixedly connected to an end of the expansion sleeve (412) away from the vent hole (416); a return spring (413) is provided on the side wall of the fixed plate (415); the other end of the return spring (413) is fixedly connected to the side wall of the follower plate (411); and the return spring (413) is located inside the expansion sleeve (412).

9. The insulation layer extrusion device of a cable with a cold-resistant insulation layer according to claim 1, characterized in that: The expansion sleeve (412) is provided with a heat expansion material inside, the two sides of the vent hole (416) are respectively connected to the inside of the side groove (414) and the inside of the expansion sleeve (412), the magnetic plate (418) is provided with a sliding hole (417), the inside of the sliding hole (417) is slidably connected with a top block (424), one end of the top block (424) is fixedly connected to the side wall of the clearance plate (423), an elastic reset block (425) is provided between the clearance plate (423) and the magnetic plate (418), and the peripheral side surfaces of the magnetic plate (418) and the clearance plate (423) are both sealed and slidably connected to the inner wall of the side groove (414) and the fixed plate (415).

10. The insulation layer extrusion device of a cable with a cold-resistant insulation layer according to claim 1, characterized in that: An elastic connection block (419) is provided on one side of the magnetic plate (418), and the other side of the elastic connection block (419) is fixedly connected to the inner wall of the side groove (414). A plurality of limiting holes (420) are evenly provided inside the mold sleeve (401), and the two sides of the limiting holes (420) are respectively connected to the inside of the side groove (414) and the mold core (402). A moving rod (421) is sealingly and slidably connected inside the limiting holes (420), and one end of the moving rod (421) is fixedly connected to the side wall of the magnetic plate (418), and the other end of the moving rod (421) is provided with a clamping plate (422), and the other end of the clamping plate (422) matches the outer surface of the wire core (101).

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