Apparatus and method for manufacturing high temperature special cable

Abstract

The application discloses a kind of manufacturing device and method of high temperature special cable, belong to cable technical field, to solve the problem that existing special cable high temperature resistance and impact resistance is difficult to meet simultaneously;The application is installed mineral mica layer by wire core, mineral mica layer, crosslinked insulation layer, ceramic fireproof layer and flame-retardant sheath, ensure that wire core has good high temperature resistance and fire resistance, while installing crosslinked insulation layer in the peripheral mineral mica layer, further improve the overall heat resistance, finally set up flame-retardant sheath, and flame-retardant sheath is made of low smoke halogen-free flame-retardant polyolefin, wollastonite powder and polytetrafluoroethylene powder mixture, because wollastonite powder has higher heat resistance and reinforcing effect, can improve the overall mechanical strength and high temperature resistance, polytetrafluoroethylene powder has excellent high temperature and self-lubricating performance, can reduce the overall friction coefficient under high temperature, improve its anti-aging and wear resistance.

Description

Technical Field

[0001] This invention relates to the field of cable technology, and in particular to an apparatus and method for manufacturing high-temperature special cables. Background Technology

[0002] Special cables are cable products with special properties, structures or functions, suitable for specific environments or special application scenarios. Compared with ordinary cables, special cables can meet the safe and reliable transmission requirements under extreme conditions such as high temperature, high pressure, corrosion, and strong electromagnetic interference through material innovation, structural design or process optimization.

[0003] Chinese patent CN116959803A discloses a cable and a cable manufacturing method. The cable manufacturing method includes the following steps: processing an insulator to achieve a first height on its upper surface; laying a first core group on the upper surface of the insulator, wherein the first core group includes multiple first cores; processing the insulator to achieve a second height on its upper surface, and the insulator covers the first core group, wherein the second height is greater than the first height; laying a second core group on the upper surface of the insulator, the second core group including multiple first cores, and the multiple first cores of the second core group are spaced apart in the width direction of the insulator; processing the insulator to achieve a third height on its upper surface, and the insulator covers the first core group, wherein the third height is greater than the second height. This cable manufacturing method can integrate multiple wire bundles together and ensure that various cores are in their respective positions and their relative positions are stable.

[0004] However, in the existing technology, the special cables manufactured have poor high temperature resistance. In the process of manufacturing special cables, due to the weak bonding between wollastonite and polyolefin, they are prone to agglomeration, which leads to a decrease in overall mechanical properties. Although the overall high temperature resistance is improved, the overall impact resistance decreases and the service life is shortened, resulting in higher costs.

[0005] Therefore, we propose a high-temperature special cable and its manufacturing method. Summary of the Invention

[0006] The purpose of this invention is to provide a high-temperature special cable and its manufacturing method, which solves the problem in the prior art that it is difficult to simultaneously meet the requirements of high temperature resistance and impact resistance in special cables.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a method for manufacturing a high-temperature special cable, comprising the following steps:

[0008] S1: Preparation of the conductor core: multiple copper wires are twisted into a metal conductor core, and insulating material is wrapped around the outer periphery of the metal conductor core;

[0009] S2: Wrapping mineral mica layer: Use a wrapping machine to tightly wrap mineral mica tape around the outer periphery of the conductor. During the wrapping process, the wrapping tension and overlap rate should be controlled to ensure the integrity and continuity of the mineral mica layer.

[0010] S3: Extrusion of cross-linked insulation layer: Cross-linked polyethylene raw material is added to the cable manufacturing device, the cross-linked polyethylene is melted and extruded through the cable manufacturing device, and the melted cross-linked polyethylene is used to cover the outer periphery of the conductor through the extrusion die;

[0011] S4: Add flame-retardant filler layer: During the cabling process, flame-retardant polypropylene material is filled into the gaps in the conductor to ensure the roundness and stability of the cable. When filling, attention should be paid to the uniformity and density of the filling to avoid voids and gaps.

[0012] S5: Ceramicized fireproof coating: Ceramicized silicone rubber is extruded using a cable manufacturing device, and the ceramicized silicone rubber is coated around the conductor filled with a flame-retardant filler layer using an extrusion die.

[0013] S6: Extruded flame-retardant sheath: Low-smoke halogen-free flame-retardant polyolefin material and mixture are added to the cable manufacturing device in proportion, and the low-smoke halogen-free flame-retardant polyolefin material and mixture are extruded through the cable manufacturing device, and then the extrusion die is used to cover the outer periphery of the ceramicized fireproof layer.

[0014] Furthermore, the outer surface of the wire core is wrapped with a mineral mica layer, the outer surface of the mineral mica layer is covered with a cross-linked insulation layer, the outer surface of the cross-linked insulation layer is filled with a flame-retardant filler layer, the outer surface of the flame-retardant filler layer is covered with a ceramicized fireproof layer, and the outer surface of the ceramicized fireproof layer is covered with a flame-retardant sheath.

[0015] Furthermore, the cross-linked insulation layer is cross-linked polyethylene, the flame-retardant filler layer is flame-retardant polypropylene, the ceramicized fireproof layer is ceramicized silicone rubber, and the flame-retardant sheath is made of a mixture of low-smoke halogen-free flame-retardant polyolefin, wollastonite powder, and polytetrafluoroethylene micro powder.

[0016] Furthermore, in S6, the mixture is a mixture of wollastonite powder and polytetrafluoroethylene micro powder. The ratio of low-smoke halogen-free flame-retardant polyolefin, wollastonite powder and polytetrafluoroethylene micro powder is 20:7:1. When preparing wollastonite powder, wollastonite is first pre-coated with a silane coupling agent.

[0017] Another technical solution proposed by the present invention is to provide a manufacturing apparatus for high-temperature special cables. The cable manufacturing apparatus includes a machine base, an extrusion component disposed on the upper part of the machine base, and a feeding component disposed on the upper part of the extrusion component. A mounting platform is disposed on one side of the machine base, a housing is disposed on the upper part of the mounting platform, a base is disposed on one side of the mounting platform, a main motor is disposed on the upper part of the base, a transmission component is disposed on one side of the main motor, and the main motor is connected to a gear transmission group disposed inside the housing through the transmission component. One end of the gear transmission group is connected to the extrusion component.

[0018] Furthermore, the transmission component includes a transmission wheel A disposed at the output end of the main motor, a transmission belt sleeved on the outer surface of the transmission wheel A, and a transmission wheel B disposed on the outer surface of the transmission belt. A transmission rod is disposed at the center of the transmission wheel B. One end of the transmission rod is connected to a gear transmission assembly. A linkage rod is disposed on the outer surface of the gear transmission assembly. An extrusion screw is disposed at one end of the linkage rod. The extrusion screw is located inside the extrusion component.

[0019] Furthermore, the extrusion component includes side shields A and B disposed on the upper part of the machine platform. Side shields A and B are disposed opposite each other. An extrusion sleeve is disposed between side shields A and B. An extrusion screw is disposed inside the extrusion sleeve. An electric heating component is disposed on the outer surface of the extrusion sleeve. The electric heating component is connected to an external power source. A discharge port is opened on the outer surface of one end of the extrusion sleeve. The discharge port is connected to the feeding component.

[0020] Furthermore, a small fan is provided at the lower end of the electric heating component, and a small motor is provided on one side of the small fan. The output end of the small motor is connected to the rotating shaft of the small fan. The electric heating component includes a heat transfer cylinder sleeved on the outer surface of the extrusion sleeve, a mounting box provided at the lower end of the heat transfer cylinder, and an electric heating plate provided inside the mounting box and the heat transfer cylinder. One side of the mounting box is connected to the air outlet of the small fan, and the other side of the mounting box is connected to the heat transfer cylinder.

[0021] Furthermore, the feeding component includes a feeding hopper disposed on the outer surface of the extrusion sleeve, an observation window disposed on one side of the feeding hopper, and a discharge pipe disposed on the outer surface of the feeding hopper. A weighing assembly is also disposed on the outer surface of the feeding hopper, comprising a storage box disposed on the outer surface of the feeding hopper, the storage box being connected to the feeding hopper, a storage compartment being opened inside the storage box, an electric push rod being disposed inside the storage compartment, a bearing plate being disposed at one end of the electric push rod, a weighing unit being embedded in the upper surface of the bearing plate, and an inclined scraper being disposed on the inner wall of the storage compartment, one end of the inclined scraper being flush with the upper surface of the bearing plate. The storage box has an inner cavity with a push plate and a plug tube inside. One end of the push plate is inserted into the plug tube. A magnetic plate is embedded in the bottom surface of the support plate and is magnetically connected to the push plate. One end of the plug tube has a bend that extends into the interior of the inclined scraper. An inclined spray pipe is installed on the outer surface of the inclined scraper. A branch pipe is installed inside the inclined scraper, and a one-way valve A is installed inside the branch pipe. The inclined spray pipe is connected to the bend pipe through the branch pipe. A rubber cover is installed at one end of the inclined scraper, and one end of the bend pipe corresponds to the rubber cover. A one-way valve B is installed inside the end of the bend pipe near the rubber cover.

[0022] Furthermore, an extrusion plate is provided at one end of the extrusion sleeve, and a connecting groove is provided on the outer surface of the extrusion plate. The extrusion plate is connected to the extrusion sleeve through the connecting groove. An extrusion hole is provided at the center of the extrusion plate, and an outer connecting pipe is provided on one side of the extrusion plate, which corresponds to the extrusion hole.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] This invention proposes a manufacturing apparatus and method for high-temperature special cables. The method involves a core, a mineral mica layer, a cross-linked insulation layer, a ceramicized fire-retardant layer, and a flame-retardant sheath. The mineral mica layer is installed around the core to ensure good high-temperature resistance and fire resistance. A cross-linked insulation layer is then installed around the mineral mica layer to further enhance the overall heat resistance. Additionally, a ceramicized fire-retardant layer further improves the overall fire resistance. Finally, a flame-retardant sheath is provided, which is made of low-smoke halogen-free flame-retardant polyolefin and silica fume. It is made by mixing wollastonite powder and polytetrafluoroethylene (PTFE) micro powder. Because wollastonite powder has high heat resistance and reinforcing properties, it can improve the overall mechanical strength and high temperature resistance. PTFE micro powder has excellent high temperature resistance and self-lubricating properties, which can reduce the overall friction coefficient at high temperatures and improve its anti-aging and wear resistance. In addition, when preparing wollastonite powder, wollastonite is first pre-coated with a silane coupling agent to improve the interfacial compatibility between wollastonite powder and PTFE, thereby improving the overall high temperature resistance and impact resistance. Attached Figure Description

[0025] Figure 1 This is a structural diagram of the special cable in the manufacturing apparatus and method for high-temperature special cables of the present invention;

[0026] Figure 2 This is a flowchart of the special cable manufacturing process in the high-temperature special cable manufacturing apparatus and method of the present invention;

[0027] Figure 3 This is a schematic diagram of the overall structure of the manufacturing apparatus and method for high-temperature special cables of the present invention. Figure 1 ;

[0028] Figure 4 This is a schematic diagram of the overall structure of the manufacturing apparatus and method for high-temperature special cables of the present invention. Figure 2 ;

[0029] Figure 5 This is a schematic diagram of the extrusion component structure in the manufacturing apparatus and method for high-temperature special cables of the present invention. Figure 1 ;

[0030] Figure 6 This is a schematic diagram of the extrusion component structure in the manufacturing apparatus and method for high-temperature special cables of the present invention. Figure 2 ;

[0031] Figure 7 This is a schematic diagram of the extrusion component structure in the manufacturing apparatus and method for high-temperature special cables of the present invention. Figure 3 ;

[0032] Figure 8 This is a schematic diagram of the weighing component structure in the manufacturing apparatus and method for high-temperature special cables of the present invention.

[0033] Figure 9 The apparatus and method for manufacturing high-temperature special cables of the present invention Figure 8 Enlarged view of point A;

[0034] Figure 10 This is a schematic diagram of the electric heating component in the manufacturing apparatus and method for high-temperature special cables of the present invention.

[0035] In the diagram: 1. Machine base; 11. Wire core; 12. Mineral mica layer; 13. Cross-linked insulation layer; 14. Flame-retardant filler layer; 15. Ceramicized fireproof layer; 16. Flame-retardant sheath; 2. Extrusion component; 21. Side cover A; 22. Side cover B; 23. Extrusion sleeve; 24. Feed port; 25. Electric heating component; 251. Heat transfer cylinder; 252. Mounting box; 253. Electric heating plate; 26. Pressure gauge; 27. Small fan; 28. Small motor; 29. ​​Thermometer; 210. Extrusion plate; 211. Connecting groove; 212. Extrusion orifice; 213. External pipe; 3. Feeding component; 31. Feed hopper; 32. Observation window; 33. Discharge pipe; 4. Mounting platform; 41. Chassis; 42. Gear transmission group; 43. Linkage rod; 5. Base; 6. Main motor; 7. Transmission components; 71. Transmission wheel A; 72. Transmission wheel B; 73. Transmission belt; 74. Transmission rod; 8. Weighing assembly; 81. Storage box; 82. Storage bin; 83. Bearing plate; 831. Magnetic plate; 84. Weighing unit; 85. Inclined scraper; 851. Inclined spray pipe; 852. Branch pipe; 853. One-way valve A; 854. Rubber cover; 855. One-way valve B; 86. Push plate; 87. Plug pipe; 88. Bend pipe; 89. Controller; 9. Extrusion screw. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] To address the technical challenges of improving the high-temperature resistance and impact resistance of special cables, such as... Figure 1 and Figure 2 As shown, the following preferred technical solutions are provided:

[0038] A high-temperature special cable includes a conductor 11, a mineral mica layer 12 wrapped around the outer surface of the conductor 11, and a cross-linked insulation layer 13 wrapped around the outer surface of the mineral mica layer 12. The outer surface of the cross-linked insulation layer 13 is filled with a flame-retardant filler layer 14, the outer surface of the flame-retardant filler layer 14 is covered with a ceramicized fireproof layer 15, and the outer surface of the ceramicized fireproof layer 15 is covered with a flame-retardant sheath 16.

[0039] The cross-linked insulation layer 13 is cross-linked polyethylene, the flame-retardant filler layer 14 is flame-retardant polypropylene, the ceramicized fireproof layer 15 is ceramicized silicone rubber, and the flame-retardant sheath 16 is made of a mixture of low-smoke halogen-free flame-retardant polyolefin, wollastonite powder and polytetrafluoroethylene micro powder.

[0040] One method for manufacturing a high-temperature special cable includes the following steps:

[0041] S1: Preparation of conductor core: multiple copper wires are twisted into a metal conductor core 11, and insulating material is wrapped around the outer periphery of the metal conductor core 11;

[0042] S2: Wrapping mineral mica layer 12: Use a wrapping machine to tightly wrap the mineral mica tape around the outer periphery of the conductor. During the wrapping process, the wrapping tension and overlap rate should be controlled to ensure the integrity and continuity of the mineral mica layer 12.

[0043] S3: Extrusion of cross-linked insulation layer 13: Cross-linked polyethylene raw material is added to the cable manufacturing device, the cross-linked polyethylene is melted and extruded through the cable manufacturing device, and the melted cross-linked polyethylene is used to cover the outer periphery of the conductor through the extrusion die;

[0044] S4: Add flame-retardant filler layer 14: During the cabling process, flame-retardant polypropylene material is filled into the gaps in the conductor to ensure the roundness and stability of the cable. When filling, attention should be paid to the uniformity and density of the filling to avoid voids and gaps.

[0045] S5: Ceramicized fireproof layer 15: Ceramicized silicone rubber is extruded using a cable manufacturing device, and the ceramicized silicone rubber is wrapped around the conductor filled with flame-retardant filler layer 14 using an extrusion die.

[0046] S6: Extruded flame-retardant sheath 16: Low-smoke halogen-free flame-retardant polyolefin material and mixture are added to the cable manufacturing device in proportion, and the low-smoke halogen-free flame-retardant polyolefin material and mixture are extruded through the cable manufacturing device, and then the extrusion die is used to cover the outer periphery of the ceramic fireproof layer 15.

[0047] In S6, the mixture is a mixture of wollastonite powder and polytetrafluoroethylene micro powder. The ratio of low-smoke halogen-free flame-retardant polyolefin, wollastonite powder and polytetrafluoroethylene micro powder is 20:7:1. When preparing wollastonite powder, wollastonite is first pre-coated with silane coupling agent.

[0048] Specifically, a mineral mica layer 12 is installed around the core 11 to ensure that the core 11 has good high temperature resistance and fire resistance. At the same time, a cross-linked insulation layer 13 is installed around the mineral mica layer 12 to further improve the overall heat resistance. In addition, a ceramicized fireproof layer 15 is set to further improve the overall fire resistance. Finally, a flame-retardant sheath 16 is set. The flame-retardant sheath 16 is made of low smoke halogen-free flame-retardant polyolefin, wollastonite powder and polytetrafluoroethylene micro powder. Because wollastonite powder has high heat resistance and reinforcing effect, it can improve the overall mechanical strength and high temperature resistance. Polytetrafluoroethylene micro powder has excellent high temperature resistance and self-lubricating properties, which can reduce the friction coefficient of the whole at high temperature and improve its anti-aging and wear resistance. In addition, when preparing wollastonite powder, wollastonite is first pre-coated with silane coupling agent to improve the interfacial compatibility between wollastonite powder and polytetrafluoroethylene, thereby improving the overall high temperature resistance and impact resistance.

[0049] In addition, pre-coating wollastonite with a silane coupling agent such as KH-550 at a dosage of 1%-2% can improve interfacial compatibility. Wollastonite with a D50 of 5-8μm can be selected to form a gradient filling with PTFE micropowder with a D50 of 2~5μm, thereby reducing voids.

[0050] To address the technical challenge of further improving the high-temperature resistance of special cables, such as... Figures 3-10 The following preferred technical solutions are provided:

[0051] A high-temperature special cable manufacturing apparatus includes a machine base 1, an extrusion component 2 mounted on the upper end of the machine base 1, and a feeding component 3 mounted on the upper end of the extrusion component 2. A mounting platform 4 is mounted on one side of the machine base 1, a housing 41 is mounted on the upper end of the mounting platform 4, a base 5 is mounted on one side of the mounting platform 4, a main motor 6 is mounted on the upper end of the base 5, and a transmission component 7 is mounted on one side of the main motor 6. The main motor 6 is connected to a gear transmission group 42 located inside the housing 41 via the transmission component 7. One end of the gear transmission group 42 is connected to the extrusion component 2. Low-smoke halogen-free flame-retardant polyolefin material and mixture are fed into the feeding component 3 and enter the extrusion component 2. The main motor 6 is started, and its output end drives the transmission component 7 to rotate, which in turn drives the gear transmission group 42 to rotate. The gear transmission group 42 then causes the extrusion component 2 to start working, thereby heating and melting the low-smoke halogen-free flame-retardant polyolefin material and mixture and extruding it into the extrusion die, and then coating the conductor through the extrusion die.

[0052] The transmission component 7 includes a transmission wheel A71 disposed at the output end of the main motor 6, a transmission belt 73 sleeved on the outer surface of the transmission wheel A71, and a transmission wheel B72 disposed on the outer surface of the transmission belt 73. A transmission rod 74 is disposed at the center of the transmission wheel B72. One end of the transmission rod 74 is connected to the gear transmission assembly 42. A linkage rod 43 is disposed on the outer surface of the gear transmission assembly 42. An extrusion screw 9 is disposed at one end of the linkage rod 43. The extrusion screw 9 is located inside the extrusion component 2. When the main motor 6 is started, its output end will drive the transmission wheel A71 to rotate. The transmission wheel A71 will then cause the transmission belt 73 to rotate, which in turn will cause the transmission wheel B72 to rotate. The rotation of the transmission wheel B72 will then cause the transmission rod 74 to rotate, which will then drive the gear transmission assembly 42 to operate. Finally, the linkage rod 43 will drive the extrusion screw 9 to rotate, thereby completing the extrusion of low-smoke halogen-free flame-retardant polyolefin materials and mixtures.

[0053] The extrusion unit 2 includes side shields A21 and B22 mounted on the upper end of the machine base 1. Side shields A21 and B22 are arranged opposite each other, and an extrusion sleeve 23 is arranged between the side shields A21 and B22. The extrusion screw 9 is located inside the extrusion sleeve 23. An electric heating component 25 is mounted on the outer surface of the extrusion sleeve 23. The electric heating component 25 is connected to an external power source. A feeding port 24 is opened on the outer surface of one end of the extrusion sleeve 23. The feeding port 24 is connected to the feeding unit 3. After the low-smoke halogen-free flame-retardant polyolefin material and the mixture are put into the feeding unit 3, they will enter the extrusion sleeve 23 through the feeding port 24. At the same time, during the operation, as the extrusion screw 9 rotates continuously, the electric heating component 25 is turned on, thereby raising the temperature inside the extrusion sleeve 23 and completing the heating and melting of the low-smoke halogen-free flame-retardant polyolefin material and the mixture.

[0054] A small fan 27 is provided at the lower end of the electric heating assembly 25, and a small motor 28 is provided on one side of the small fan 27. The output end of the small motor 28 is connected to the rotating shaft of the small fan 27. The electric heating assembly 25 includes a heat transfer cylinder 251 sleeved on the outer surface of the extrusion sleeve 23, a mounting box 252 provided at the lower end of the heat transfer cylinder 251, and an electric heating plate 253 provided inside the mounting box 252 and the heat transfer cylinder 251. One side of the mounting box 252 is connected to the air outlet of the small fan 27, and the other side of the mounting box 252 is connected to the heat transfer cylinder 251. The electric heating plate 253 is opened... When the extrusion is started, the heat generated will gradually diffuse into the heat transfer cylinder 251. Through the heat transfer effect, the heat will raise the internal temperature of the extrusion sleeve 23, thereby heating and melting the low-smoke halogen-free flame-retardant polyolefin material and mixture inside. At the same time, during the heating process, the small fan 27 is turned on to blow out airflow, thereby distributing the heat generated by the electric heating plate 253 evenly and quickly into the heat transfer cylinder 251, improving the heating quality. In addition, a pressure gauge 26 and a thermometer 29 are installed on the outer surface of the extrusion sleeve 23 to monitor the pressure and temperature inside the extrusion sleeve 23.

[0055] The feeding component 3 includes a feeding hopper 31 disposed on the outer surface of the extrusion sleeve 23, an observation window 32 disposed on one side of the feeding hopper 31, and a discharge pipe 33 disposed on the outer surface of the feeding hopper 31. A weighing component 8 is also disposed on the outer surface of the feeding hopper 31. The weighing component 8 includes a storage box 81 disposed on the outer surface of the feeding hopper 31, which is connected to the feeding hopper 31. A storage compartment 82 is opened inside the storage box 81, and an electric push rod is disposed inside the storage compartment 82. A bearing plate 83 is disposed at one end of the electric push rod, and a weighing unit 84 is embedded on the upper surface of the bearing plate 83. An inclined scraper 85 is disposed on the inner wall of the storage compartment 82. One end of the 5 is in contact with the upper surface of the support plate 83. A cavity is formed inside the inner wall of the storage box 81, and a push plate 86 and a plug tube 87 are installed inside the cavity. One end of the push plate 86 is inserted into the plug tube 87. A magnetic plate 831 is embedded in the lower bottom surface of the support plate 83, and the magnetic plate 831 is magnetically connected to the push plate 86. One end of the plug tube 87 is provided with a bent tube 88, and one end of the bent tube 88 extends into the interior of the inclined scraper 85. An inclined spray pipe 851 is provided on the outer surface of the inclined scraper 85. A branch pipe 852 is provided inside the inclined scraper 85, and a one-way valve A853 is provided inside the branch pipe 852. The inclined spray pipe 851 is connected to the bent tube 88 through the branch pipe 852. A rubber cover 854 is provided at one end, and one end of a bent pipe 88 corresponds to the rubber cover 854. A one-way valve B855 is provided inside the end of the bent pipe 88 near the rubber cover 854. During the feeding process, an electric push rod is used to bring one end of the bearing plate 83 into contact with the inner wall of the feed hopper 31, and the material to be fed is placed on the bearing plate 83. The weighing unit 84 is used to weigh the material to obtain the required weight. At the same time, the weighing data is displayed on the controller 89 installed on the upper end of the storage box 81. After the weighing is completed, the electric push rod is used to retract the bearing plate 83 into the storage bin 82. During the retraction process, the material on the bearing plate 83 is scraped by the inclined scraper 85. The material is scraped into the extrusion sleeve 23. At the same time, the magnetic plate 831 moves with the push plate 86, which continuously compresses the air inside the plug tube 87 and forces it into the bend tube 88, then sprays it out from the inclined nozzle 851 to promote material discharge. After the material discharge is completed, the support plate 83 extends again. At this time, the push plate 86 draws the gas in the plug tube 87, which reduces the air pressure in the bend tube 88. This causes the rubber cover 854 to deform, causing the material stuck to the surface of the rubber cover 854 to fall off, thus achieving precise utilization of the material. It should be noted that the one-way valve A853 can only discharge air, while the one-way valve B855 can only inlet air.

[0056] An extrusion plate 210 is provided at one end of the extrusion sleeve 23. A connecting groove 211 is provided on the outer surface of the extrusion plate 210. The extrusion plate 210 is connected to the extrusion sleeve 23 through the connecting groove 211. An extrusion hole 212 is provided at the center of the extrusion plate 210. An outer pipe 213 is provided on one side of the extrusion plate 210. The outer pipe 213 corresponds to the extrusion hole 212. As the extrusion screw 9 rotates continuously, the material in the extrusion sleeve 23 moves continuously towards the extrusion plate 210. The material in the extrusion sleeve 23 will come out from the extrusion hole 212. The molten material is then injected into the extrusion die through the pipe to complete the packaging with the conductor.

[0057] Specifically, during the production of the flame-retardant sheath 16, the low-smoke halogen-free flame-retardant polyolefin material and the mixture need to be weighed in detail to determine the proportion. The material to be weighed is placed into the feed hopper 31, and the material falls onto the support plate 83. The weighing unit 84 is used to weigh the material to determine the required weight, and the weighing data is displayed on the controller 89. After weighing, the electric push rod is used to retract the support plate 83 into the storage bin 82. During the retraction process, the material on the support plate 83 is scraped off by the inclined scraper 85 into the extrusion sleeve 23. At the same time, the magnetic plate 831 moves along with the push plate 86, thereby causing one end of the push plate 86 to continuously compress the air inside the plug tube 87 and... These gases are compressed into the bend 88 and ejected from the inclined nozzle 851, promoting material discharge. After the discharge is completed, the bearing plate 83 extends again. At this time, the push plate 86 draws the gas in the plug tube 87, thereby reducing the air pressure in the bend 88, which causes the rubber cover 854 to deform, causing the material stuck to the surface of the rubber cover 854 to fall off. This achieves precise utilization of the material. On the one hand, it prevents the material from sticking to the inclined scraper 85, improving the accuracy of material weighing and indirectly increasing the mixing ratio of the material. When the mixing ratio of the material is more accurate, the quality of the produced flame-retardant sheath 16 is higher and the high-temperature resistance is better. On the other hand, it can also prevent material waste and reduce production costs.

[0058] It should be noted that in the above embodiments, the extrusion die is an indispensable production device in the cable production and coating process, which belongs to the prior art and will not be described in detail here.

[0059] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A manufacturing apparatus for high-temperature special cables, characterized in that, Includes a machine base (1), an extrusion component (2) set on the upper end of the machine base (1), and a feeding component (3) set on the upper end of the extrusion component (2). A mounting platform (4) is set on one side of the machine base (1), a housing (41) is set on the upper end of the mounting platform (4), a base (5) is set on one side of the mounting platform (4), a main motor (6) is set on the upper end of the base (5), a transmission component (7) is set on one side of the main motor (6), and the main motor (6) is connected to a gear transmission group (42) set inside the housing (41) through the transmission component (7). One end of the gear transmission group (42) is connected to the extrusion component (2). The extrusion component (2) includes a side shield A (21) and a side shield B (22) disposed on the upper end of the machine base (1). The side shield A (21) and the side shield B (22) are disposed opposite to each other. An extrusion sleeve (23) is disposed between the side shield A (21) and the side shield B (22). An extrusion screw (9) is disposed inside the extrusion sleeve (23). An electric heating component (25) is disposed on the outer surface of the extrusion sleeve (23). The electric heating component (25) is connected to an external power source. A discharge port (24) is opened on the outer surface of one end of the extrusion sleeve (23). The discharge port (24) is connected to the feeding component (3). The feeding component (3) includes a feeding hopper (31) disposed on the outer surface of the extrusion sleeve (23), an observation window (32) disposed on one side of the feeding hopper (31), and a discharge pipe (33) disposed on the outer surface of the feeding hopper (31). A weighing component (8) is also disposed on the outer surface of the feeding hopper (31). The weighing component (8) includes a storage box (81) disposed on the outer surface of the feeding hopper (31). The storage box (81) is connected to the feeding hopper (31). A storage compartment (82) is opened inside the storage box (81). An electric push rod is disposed inside the storage compartment (82). A bearing plate (83) is disposed at one end of the electric push rod. A weighing unit (84) is embedded on the upper surface of the bearing plate (83). An inclined scraper (85) is disposed on the inner wall of the storage compartment (82). One end of the inclined scraper (85) is in contact with the upper surface of the bearing plate (83). A cavity is opened inside the inner wall of the storage box (81). Inside the cavity, there is a push plate (86) and a plug tube (87). One end of the push plate (86) is inserted into the plug tube (87). A magnetic plate (831) is embedded in the bottom surface of the support plate (83). The magnetic plate (831) is magnetically connected to the push plate (86). One end of the plug tube (87) is provided with a bend tube (88). One end of the bend tube (88) extends into the interior of the inclined scraper (85). An inclined spray pipe (851) is provided on the outer surface of the inclined scraper (85). The inclined scraper (85) has a branch pipe (852) inside, and a one-way valve A (853) is installed inside the branch pipe (852). The inclined spray pipe (851) is connected to the bend pipe (88) through the branch pipe (852). A rubber cover (854) is installed at one end of the inclined scraper (85), and one end of the bend pipe (88) corresponds to the rubber cover (854). A one-way valve B (855) is installed inside the bend pipe (88) near the rubber cover (854).

2. The manufacturing apparatus for high-temperature special cables as described in claim 1, characterized in that: The transmission component (7) includes a transmission wheel A (71) disposed at the output end of the main motor (6), a transmission belt (73) sleeved on the outer surface of the transmission wheel A (71), and a transmission wheel B (72) disposed on the outer surface of the transmission belt (73). A transmission rod (74) is disposed at the center of the transmission wheel B (72). One end of the transmission rod (74) is connected to the gear transmission group (42). A linkage rod (43) is disposed on the outer surface of the gear transmission group (42). An extrusion screw (9) is disposed at one end of the linkage rod (43). The extrusion screw (9) is located inside the extrusion component (2).

3. The manufacturing apparatus for high-temperature special cables as described in claim 2, characterized in that: A small fan (27) is provided at the lower end of the electric heating assembly (25). A small motor (28) is provided on one side of the small fan (27). The output end of the small motor (28) is connected to the rotating shaft of the small fan (27). The electric heating assembly (25) includes a heat transfer cylinder (251) sleeved on the outer surface of the extrusion sleeve (23), a mounting box (252) provided at the lower end of the heat transfer cylinder (251), and an electric heating plate (253) provided inside the mounting box (252) and the heat transfer cylinder (251). One side of the mounting box (252) is connected to the air outlet of the small fan (27), and the other side of the mounting box (252) is connected to the heat transfer cylinder (251).

4. The manufacturing apparatus for high-temperature special cables as described in claim 3, characterized in that: An extrusion plate (210) is provided at one end of the extrusion sleeve (23). A connecting groove (211) is provided on the outer surface of the extrusion plate (210). The extrusion plate (210) is connected to the extrusion sleeve (23) through the connecting groove (211). An extrusion hole (212) is provided at the center of the extrusion plate (210). An outer pipe (213) is provided on one side of the extrusion plate (210). The outer pipe (213) corresponds to the extrusion hole (212).

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