New energy automobile cable insulation layer return material co-extrusion molding equipment

Abstract

The invention relates to the technical field of new energy automobile cable manufacturing, in particular to new energy automobile cable insulation layer return material co-extrusion molding equipment which comprises an insulation return material and a wire harness, and further comprises an insulation return material extrusion part, a screen exchange filtering part, a connection transition part and an insulation layer wire harness co-extrusion molding part which are connected in sequence. All the parts work cooperatively so as to realize co-extrusion molding of the cable insulation layer returned material; the insulating return material extrusion part is connected with an external screw extruder and is used for feeding an insulating return material; the insulating layer wire harness co-extrusion molding part comprises a wire harness entering section, a co-extrusion polymerization section and a cooling molding section, and the connection transition part is communicated with the co-extrusion polymerization section; the insulation return material and the wire harness entering from the wire harness entering section are subjected to co-extrusion polymerization, and are output and formed through the cooling forming section; according to the invention, high-efficiency and uniform co-extrusion molding of the recycled material of the insulating layer is realized, the production efficiency and the product quality of the new energy automobile cable are improved, and the urgent demand of the new energy automobile industry on the high-performance cable is met.

Description

Technical Field

[0001] This invention relates to the field of new energy vehicle cable manufacturing technology, and in particular to a co-extrusion molding equipment for recycled material insulation layer of new energy vehicle cables. Background Technology

[0002] With the rapid development of the new energy vehicle industry, the demand for high-voltage cables continues to grow, resulting in a large amount of scrap and defective products generated during the insulation layer production process. Recycling and reuse can significantly reduce costs and resource consumption. Existing cable insulation extrusion molding equipment is mostly designed for virgin materials, and directly using recycled materials presents several drawbacks: large fluctuations in melt temperature and pressure, uneven plasticization, easily leading to uneven insulation layer thickness, bubbles, and delamination; impurities in the recycled material are not effectively filtered, affecting insulation performance and mechanical strength; screen changing requires machine shutdown, resulting in poor continuity and low production efficiency; insufficient heating and cooling control precision leads to poor melt flow and molding stability, making it difficult to meet the high-quality requirements of automotive-grade cables; poor compatibility with recycled materials, low utilization rate of recycled materials, and unstable performance of recycled products hinder the green and efficient production of new energy vehicle cables. Summary of the Invention

[0003] To address some of the problems existing in the prior art, this invention provides a co-extrusion molding equipment for recycled insulation layers of new energy vehicle cables. Through optimized design and innovation, this equipment achieves efficient and uniform co-extrusion molding of recycled insulation layers, improving the production efficiency and product quality of new energy vehicle cables, and meeting the urgent needs of the new energy vehicle industry for high-performance cables.

[0004] To achieve the above objectives, the present invention provides a co-extrusion molding equipment for recycled insulation material of new energy vehicle cables, comprising recycled insulation material and wire harness, including a recycled insulation material extrusion section, a screen changing and filtering section, a connecting transition section, and a wire harness co-extrusion molding section connected in sequence. Each part works collaboratively to achieve co-extrusion molding of the cable insulation material. The recycled insulation material extrusion section is connected to an external screw extruder for the input of the recycled insulation material. The wire harness co-extrusion molding section includes a wire harness input section, a co-extrusion polymerization section, and a cooling molding section. The connecting transition section is connected to the co-extrusion polymerization section. The recycled insulation material is co-extruded and polymerized with the wire harness entering from the wire harness input section, and then output as molded material through the cooling molding section.

[0005] The beneficial effects of this invention are as follows: Through the sequentially connected insulating recycled material extrusion section, screen changing and filtering section, connecting transition section, and insulating layer wire harness co-extrusion forming section, efficient and uniform co-extrusion forming of the insulating layer recycled material is achieved. The pressure equalization, precise heating, and temperature control pressure measurement structure of the insulating recycled material extrusion section improves the plasticization uniformity and melt stability of the recycled material; the screen changing and filtering section enables multi-station screen changing and dual heating filtration without stopping the machine, effectively removing impurities and ensuring production continuity; the conical pressure boosting and flow stabilizing structure of the connecting transition section optimizes the melt flow state; the co-extrusion polymerization section and the cooling forming section work together to achieve uniform coating and precise shaping of the insulating layer, significantly improving the recycling rate, reducing energy consumption and production costs, ensuring uniform insulation layer thickness, density, and insulation performance, meeting the high-quality and green production requirements of new energy vehicle cables, and meeting the production requirements of high insulation, high strength, and high consistency for new energy vehicle cables, thereby improving production continuity and product qualification rate.

[0006] As a further improvement of the present invention, in order to achieve uniform entry of insulating material and avoid fluctuations and instability during the extrusion process, the insulating recycled material extrusion section includes a connecting flange, a pressure equalizing orifice plate, and an electric heater assembly. The connecting flange is connected to the die head of the screw extruder. The pressure equalizing orifice plate is located between the connecting flange and the electric heater assembly to achieve uniform entry of insulating recycled material. The electric heater assembly includes a connecting pipe, and a sleeve and a jacket shell are sequentially fitted on the outside of the connecting pipe from the inside to the outside. Nut fasteners are installed on the jacket shell for installation and fixation.

[0007] As a further improvement of the present invention, in order to form a heat transfer oil circulation channel, enhance heating efficiency, and simultaneously achieve real-time monitoring of melt pressure and precise temperature control to improve the plasticizing quality of recycled materials, a spiral groove is provided on the outer wall of the connecting pipe, and an oil inlet and outlet are provided on the sleeve; a connector is installed in the oil inlet and outlet and is connected to the spiral groove to form a heat transfer oil circulation channel; the electric heater assembly also includes a melt pressure sensor and a thermocouple assembly, which are used to detect internal pressure and precisely control heating temperature, respectively.

[0008] As a further improvement of the present invention, in order to achieve multi-station switching without stopping the machine, simplify screen changing and filtration operations, and improve production efficiency, the screen changing and filtration unit includes a filter heating box assembly, a screen changing plate assembly, a connecting bracket, and a screen changing cylinder assembly. The screen changing plate assembly is slidably disposed within the filter heating box assembly, and the connecting bracket is mounted on the filter heating box assembly. The screen changing cylinder assembly is mounted on the connecting bracket, and its output end passes through the connecting bracket and connects to the screen changing plate assembly. The screen changing cylinder assembly drives the screen changing plate assembly to slide linearly within the filter heating box assembly, thereby achieving multi-station switching.

[0009] As a further improvement of the present invention, in order to achieve dual heating inside and outside the chamber, avoid the cooling and solidification of the recycled melt, and optimize the melt flow direction and distribution to improve sealing and filtration stability, the filter heating chamber assembly includes a chamber body, on which are provided mounting through holes and slots for sliding of the screen changing plate assembly; a first connecting flange and a second connecting flange are respectively installed on both sides of the chamber body and are connected to the mounting through holes, and a guide ring and a diffuser ring are respectively assembled in the mounting through holes near the first connecting flange; an annular electric heating tube and a first copper pressure plate are also provided inside the chamber body, the first copper pressure plate being used to adjust the pressure and gap between the screen changing plate assembly and the chamber body; an external heating plate is also provided on the chamber body, the external heating plate cooperating with the annular electric heating tube to achieve dual heating inside and outside the chamber body.

[0010] As a further improvement of the present invention, in order to simultaneously equip different specifications of filter screens to meet the filtration requirements of different purity return materials and reduce maintenance costs, the screen changing plate assembly includes a slide plate, the side end of which is provided with a stable connecting block and connected to the output end of the screen changing cylinder assembly; the slide plate is provided with multiple workstations and has a perforated plate embedded therein, and a filter screen is provided on the side of the perforated plate near the first connecting flange; both the perforated plate and the filter screen can be disassembled and replaced individually, and the specifications of the filter screen are adapted to the insulating return material; a second copper pressure plate and a slide plate heating tube are also installed on the slide plate.

[0011] As a further improvement of the present invention, in order to ensure the stability of the melt temperature and simultaneously pressurize and stabilize the melt flow to improve the pressure uniformity entering the co-extrusion process, the connecting transition section includes a transition section and a conical pressurizing section, and a flange-inner heating pipe is provided between the transition section and the conical pressurizing section; the structure of the transition section is the same as that of the electric heater assembly, and the inner diameter of the conical pressurizing section gradually decreases along the direction of the insulating return material flow to achieve melt pressurization and flow stabilization; a melt pressure sensor and a thermocouple assembly are fitted on the conical pressurizing section.

[0012] As a further improvement of the present invention, in order to control the temperature locally, adjust the melt flow and coating adhesion, and improve the tightness and uniformity of the coating between the insulation layer and the wire harness; the co-extrusion polymerization section includes a conical main inlet, a supplementary inlet, and a cooling oil connecting pipe, wherein the conical main inlet and the supplementary inlet are both connected to the internal cavity of the co-extrusion polymerization section; the conical main inlet is used for the main polymerization coating co-extrusion of the insulation recycled material and the wire harness, and the supplementary inlet is used for the supplementary polymerization coating co-extrusion of the insulation recycled material and the wire harness; a cooling oil groove is fitted around the internal cavity of the co-extrusion polymerization section, and the cooling oil connecting pipe is connected to the cooling oil groove.

[0013] As a further improvement of the present invention, in order to ensure accurate outer diameter of the insulation layer, rapid cooling and shaping, and improve surface finish and dimensional stability, the cooling and shaping section includes a sizing sleeve and a fluid cooling assembly for cooling and shaping the insulation layer covering the wire harness.

[0014] As a further improvement of the present invention, in order to optimize the melt flow path and reduce eddies and material jamming, a guide plate is provided inside the guide ring, and the angle of the guide plate is 15° to 25°.

[0015] In operation, the insulating recycled material first enters through the insulating recycled material extrusion section connected to the external screw extruder. It connects to the screw extruder head via a connecting flange. A pressure equalizing plate ensures the insulating recycled material enters evenly. The electric heater assembly uses a spiral groove and oil inlet / outlet to form a heat-conducting oil circulation channel for heating. A melt pressure sensor and thermocouple assembly respectively detect internal pressure and precisely control the heating temperature, preventing insufficient or excessive temperature failure of the insulating recycled material, while also providing data support for subsequent screen changing control. Subsequently, the insulating recycled material enters the screen changing and filtering section. The screen changing cylinder assembly drives the screen changing plate assembly to slide linearly within the filter heating box assembly, achieving multi-station switching. The filter heating box assembly uses a ring-shaped electric heating tube and an external heating plate for dual internal and external heating. A guide ring and a diffuser ring guide the insulating recycled material to rotate, stir, and flow. A first copper pressure plate adjusts the pressure and gap. The perforated plate and filter screen of the screen changing plate assembly filter the insulating recycled material and can be individually disassembled and replaced. A sliding plate heating tube ensures the sliding plate temperature, and the filter screen's dimensions... There are various types of grids to meet the filtration needs of recycled materials with different purities. Next, the insulation recycled material enters the connecting transition section. The transition section has the same structure as the electric heater assembly. The heating pipe inside the flange maintains the temperature, and the conical pressurization section increases the pressure and stabilizes the flow. The melt pressure sensor and thermocouple assembly monitor the pressure and temperature. When the melt pressure sensor detects that the pressure exceeds the limit, it determines that there is a blockage, sends a screen replacement signal, and a screen replacement operation is required. When starting up or when the temperature is too low, both electric heating and oil heating can be used simultaneously. During normal production, either method can be used. After that, it enters the insulation layer wire harness co-extrusion forming section. Before entering, the wire harness needs to be cleaned of impurities and fed in from the wire harness entry section. The insulation recycled material is co-extruded by the conical main inlet and supplementary inlet of the co-extrusion polymerization section to complete the coating of the wire harness. The cooling oil connection pipe and cooling oil tank regulate the temperature. Finally, it is cooled and shaped by the sizing sleeve and fluid cooling assembly of the cooling forming section and output, completing the entire process of co-extrusion forming of the insulation layer recycled material of new energy vehicle cables. Attached Figure Description

[0016] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings:

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the insulating recycled material extrusion section in this invention.

[0019] Figure 3 This is an exploded view of the insulating recycled material extrusion section in this invention.

[0020] Figure 4 This is a rear view of the insulating recycled material extrusion section in this invention.

[0021] Figure 5 For the present invention Figure 4 Sectional view at point AA.

[0022] Figure 6 For the present invention Figure 4 Sectional view at point BB.

[0023] Figure 7 This is a schematic diagram of the screen-changing filter section in this invention.

[0024] Figure 8 This is a front view of the screen-changing filter section in this invention.

[0025] Figure 9 For the present invention Figure 8 Sectional view at point CC.

[0026] Figure 10 For the present invention Figure 8 Sectional view at point DD.

[0027] Figure 11 This is an exploded view of the structure of the filter heating box assembly in this invention.

[0028] Figure 12 This is an exploded view of the structure of the screen replacement plate assembly in this invention.

[0029] Figure 13 This is a three-dimensional sectional view of the connecting transition section in this invention.

[0030] Figure 14 This is a schematic diagram of the structure of the co-extrusion molding part of the insulating layer wire harness in this invention.

[0031] Figure 15 This is a right-side view of the co-extrusion molding section of the insulating layer wire harness in this invention.

[0032] Figure 16 For the present invention Figure 15 Sectional view at EE.

[0033] Figure 17 For the present invention Figure 15 Sectional view at FF.

[0034] Figure 18 This is a schematic diagram of the movement trajectory of the insulating material of the present invention.

[0035] Figure 19 For the present invention Figure 18 Enlarged view of point G in the middle.

[0036] Among them, 1 is the insulating recycled material extrusion section, 11 is the connecting flange, 12 is the pressure equalizing orifice plate, 13 is the electric heater, 131 is the connecting pipe, 132 is the sleeve, 133 is the jacket shell, 134 is the melt pressure sensor, 135 is the connector, 136 is the thermocouple assembly, 137 is the nut fastener, 138 is the oil inlet and outlet, 139 is the spiral groove, 2 is the screen changing filter section, 21 is the filter heating box assembly, 211 is the box body, 212 is the mounting through hole, 213 is the first copper pressure plate, 214 is the annular electric heating tube, 215 is the outer heating plate, 216 is the second connecting flange, 217 is the guide ring, 218 is the diffuser ring, and 219 is the first connection. Flange, 22 screen changing plate assembly, 221 slide plate, 222 stabilizing connection block, 223 perforated plate, 224 filter screen, 225 second copper pressure plate, 226 slide plate heating tube, 23 connecting bracket, 24 screen changing cylinder assembly, 3 connecting transition section, 31 transition section, 32 flange inner heating tube, 33 conical pressurization section, 4 insulation layer wire harness co-extrusion forming section, 41 wire harness entry section, 42 co-extrusion polymerization section, 421 conical main inlet, 422 supplementary inlet, 423 cooling oil connecting pipe, 424 cooling oil tank, 43 cooling forming section, 431 sizing sleeve, 432 fluid cooling assembly. Detailed Implementation

[0037] To enable those skilled in the art to better understand the technical solutions in this application, the following description is provided in conjunction with the appendix. Figure 1-19 The present invention will be further described below. The following embodiments are only used to illustrate the technical solutions of the present invention more clearly, and should not be used to limit the scope of protection of the present invention.

[0038] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] like Figure 1-19The device shown is a co-extrusion molding equipment for recycled cable insulation in new energy vehicles. It includes recycled insulation material and a wire harness, comprising a recycled insulation material extrusion section 1, a screen changing and filtering section 2, a connecting transition section 3, and a wire harness co-extrusion molding section 4 connected in sequence. These sections work together to achieve co-extrusion molding of the recycled cable insulation material. The recycled insulation material extrusion section 1 is connected to an external screw extruder for the input of the recycled insulation material. The wire harness co-extrusion molding section 4 includes a wire harness input section 41, a co-extrusion polymerization section 42, and a cooling molding section 43. The connecting transition section 3 is connected to the co-extrusion polymerization section 42. The recycled insulation material is co-extruded and polymerized with the wire harness entering from the wire harness input section 41, and then output as a molded product via the cooling molding section 43. The recycled insulation material extrusion section 1 includes a connecting flange 1. 1. A pressure equalizing orifice plate 12 and an electric heater assembly 13, wherein the connecting flange 11 is connected to the die head of a screw extruder; the pressure equalizing orifice plate 12 is disposed between the connecting flange 11 and the electric heater assembly 13 to achieve uniform entry of insulating return material; the electric heater assembly 13 includes a connecting pipe 131, and a sleeve 132 and a jacket shell 133 are sequentially fitted on the outer side of the connecting pipe 131 from the inside to the outside; the jacket shell 133 is equipped with a nut fastener 137 for installation and fixation; a spiral groove 139 is formed on the outer wall of the connecting pipe 131, and an oil inlet / outlet port 138 is formed on the sleeve 132; a connector 135 is installed in the oil inlet / outlet port 138 and communicates with the spiral groove 139 to form a heat transfer oil circulation channel; the electric heater assembly Component 13 also includes a melt pressure sensor 134 and a thermocouple assembly 136, used to detect internal pressure and precisely control heating temperature, respectively; the screen changing filter section 2 includes a filter heating box assembly 21, a screen changing plate assembly 22, a connecting bracket 23, and a screen changing cylinder assembly 24; the screen changing plate assembly 22 is slidably disposed within the filter heating box assembly 21, and the connecting bracket 23 is mounted on the filter heating box assembly 21; the screen changing cylinder assembly 24 is mounted on the connecting bracket 23, and its output end passes through the connecting bracket 23 and connects to the screen changing plate assembly 22; the screen changing cylinder assembly 24 drives the screen changing plate assembly 22 to slide linearly within the filter heating box assembly 21, realizing multi-station switching; the filter heating box assembly 21 includes a box body 2. 11. The housing 211 has an installation through hole 212 and a slot for sliding the screen changing plate assembly 22. A first connecting flange 219 and a second connecting flange 216 are installed on both sides of the housing 211 and communicate with the installation through hole 212. A guide ring 217 and a diffuser ring 218 are fitted into the installation through hole 212 near the first connecting flange 219. An annular electric heating tube 214 and a first copper pressure plate 213 are also provided inside the housing 211. The first copper pressure plate 213 is used to adjust the pressure and gap between the screen changing plate assembly 22 and the housing 211. An external heating plate 215 is also provided on the housing 211. The external heating plate 215 cooperates with the annular electric heating tube 214 to achieve dual heating of the inside and outside of the housing 211.The screen changing plate assembly 22 includes a slide plate 221. A stable connecting block 222 is provided on the side of the slide plate 221 and connected to the output end of the screen changing cylinder assembly 24. The slide plate 221 has multiple workstations and is embedded with a perforated plate 223. A filter screen 224 is fitted onto the side of the perforated plate 223 near the first connecting flange 219. Both the perforated plate 223 and the filter screen 224 can be individually disassembled and replaced. The specifications of the filter screen 224 are compatible with the insulating recycled material. A second copper pressure plate 225 and a slide plate heating tube 226 are also installed on the slide plate 221. The connecting transition section 3 includes a transition section 31 and a conical pressurizing section 33. A flange-in-line heating tube 32 is provided between the transition section 31 and the conical pressurizing section 33. The structure of the transition section 31 is the same as that of the electric heater assembly 13. The inner diameter of the conical pressurizing section 33 gradually decreases along the flow direction of the insulating recycled material, achieving melt pressurization and... The flow is stabilized; a melt pressure sensor 134 and a thermocouple assembly 136 are fitted on the conical pressurizing section 33; the co-extrusion polymerization section 42 includes a conical main inlet 421, a supplementary inlet 422, and a cooling oil connecting pipe 423, both of which are connected to the internal cavity of the co-extrusion polymerization section 42; the conical main inlet 421 is used for the main polymerization coating co-extrusion of the insulating recycled material and the wire harness, and the supplementary inlet 422 is used for the supplementary polymerization coating co-extrusion of the insulating recycled material and the wire harness; a cooling oil groove 424 is fitted around the internal cavity of the co-extrusion polymerization section 42, and the cooling oil connecting pipe 423 is connected to the cooling oil groove 424; the cooling and forming section 43 includes a sizing sleeve 431 and a fluid cooling assembly 432, used for cooling and shaping the outer insulation layer of the wire harness; a guide plate is fitted inside the guide ring 217, and the angle of the guide plate is 15° to 25°.

[0040] In operation, the insulating recycled material first enters through the insulating recycled material extrusion section 1, which is connected to an external screw extruder. It is then connected to the screw extruder head via a connecting flange 11. A pressure equalizing plate 12 ensures the insulating recycled material enters evenly. The electric heater assembly 13 uses a spiral groove 139 and oil inlet / outlet 138 to form a heat-conducting oil circulation channel for heating. A melt pressure sensor 134 and a thermocouple assembly 136 respectively detect the internal pressure and precisely control the heating temperature, preventing insufficient or excessive temperature failure of the insulating recycled material. This also provides data support for subsequent screen replacement control. Subsequently, the insulating recycled material enters the screen replacement section. In the filtration section 2, the screen-changing cylinder assembly 24 drives the screen-changing plate assembly 22 to slide linearly within the filter heating box assembly 21, achieving multi-station switching. The filter heating box assembly 21 is heated internally and externally by an annular electric heating tube 214 and an outer heating plate 215. The guide ring 217 and diffuser ring 218 guide the rotating and stirring flow of the insulating return material. The first copper pressure plate 213 adjusts the pressure and gap. The perforated plate 223 and filter screen 224 of the screen-changing plate assembly 22 filter the insulating return material and can be disassembled and replaced individually. The slide plate heating tube 226 ensures the temperature of the slide plate 221, and the filter screen 22... 4 has various specifications to meet the filtration requirements of recycled materials of different purities; then the insulating recycled material enters the connecting transition section 3. The transition section 31 has the same structure as the electric heater assembly 13. The heating pipe 32 inside the flange maintains the temperature, and the conical pressurization section 33 increases the pressure and stabilizes the flow. The melt pressure sensor 134 and the thermocouple assembly 136 monitor the pressure and temperature. When the melt pressure sensor 134 detects that the pressure exceeds the limit, it determines that there is a blockage, sends a screen replacement signal, and a screen replacement operation is required; when starting up or when the temperature is too low, both electric heating and oil heating can be used simultaneously. During normal production, it uses... Any method is acceptable; then it enters the insulation layer wire harness co-extrusion molding section 4. Before entering, the wire harness needs to be cleaned of impurities and fed into the wire harness entry section. The wire harness is fed into the wire harness entry section 41. The insulation recycled material is co-extruded by the conical main inlet 421 and the supplementary inlet 422 of the co-extrusion polymerization section 42 to complete the coating of the wire harness. The cooling oil connection pipe 423 and the cooling oil tank 424 regulate the temperature. Finally, it is cooled and shaped by the sizing sleeve 431 and the fluid cooling component 432 of the cooling molding section 43 and output, completing the whole process of co-extrusion molding of the insulation layer recycled material of the new energy vehicle cable.

[0041] This invention is not limited to the above embodiments. Based on the technical solutions disclosed in this invention, those skilled in the art can make some substitutions and modifications to some of the technical features without creative effort, and these substitutions and modifications are all within the protection scope of this invention.

Claims

1. A co-extrusion molding equipment for recycled insulation layer of new energy vehicle cables, comprising recycled insulation material and wire harness, characterized in that, The system includes an insulation recycled material extrusion section (1), a screen changing and filtering section (2), a connecting transition section (3), and an insulation layer wire harness co-extrusion molding section (4) connected in sequence. Each part works together to achieve co-extrusion molding of cable insulation layer recycled material. The insulation recycled material extrusion section (1) is connected to an external screw extruder for the entry of insulation recycled material. The insulation layer wire harness co-extrusion molding section (4) includes a wire harness entry section (41), a co-extrusion polymerization section (42), and a cooling molding section (43). The connecting transition section (3) is connected to the co-extrusion polymerization section (42). The insulation recycled material is co-extruded and polymerized with the wire harness entering from the wire harness entry section (41) and is output and molded through the cooling molding section (43).

2. The new energy vehicle cable insulation layer recycled material co-extrusion molding equipment according to claim 1, characterized in that: The insulating recycled material extrusion section (1) includes a connecting flange (11), a pressure equalizing orifice plate (12), and an electric heater assembly (13). The connecting flange (11) is connected to the die head of the screw extruder. The pressure equalizing orifice plate (12) is located between the connecting flange (11) and the electric heater assembly (13) to achieve uniform entry of the insulating recycled material. The electric heater assembly (13) includes a connecting pipe (131). The outer side of the connecting pipe (131) is fitted with a sleeve (132) and a jacket shell (133) from the inside to the outside. The jacket shell (133) is equipped with a nut fastener (137) for installation and fixation.

3. The new energy vehicle cable insulation layer recycled material co-extrusion molding equipment according to claim 2, characterized in that: The outer wall of the connecting pipe (131) is provided with a spiral groove (139), and the sleeve (132) is provided with an oil inlet and outlet (138); the oil inlet and outlet (138) is provided with a connector (135) and is connected to the spiral groove (139) to form a heat transfer oil circulation channel; the electric heater assembly (13) also includes a melt pressure sensor (134) and a thermocouple assembly (136), which are used to detect the internal pressure and accurately control the heating temperature, respectively.

4. The new energy vehicle cable insulation layer recycled material co-extrusion molding equipment according to claim 1, characterized in that: The screen changing filter unit (2) includes a filter heating box assembly (21), a screen changing plate assembly (22), a connecting bracket (23), and a screen changing cylinder assembly (24). The screen changing plate assembly (22) is slidably installed inside the filter heating box assembly (21), and the connecting bracket (23) is installed on the filter heating box assembly (21). The screen changing cylinder assembly (24) is installed on the connecting bracket (23), and its output end passes through the connecting bracket (23) and is connected to the screen changing plate assembly (22). The screen changing cylinder assembly (24) drives the screen changing plate assembly (22) to slide linearly inside the filter heating box assembly (21), thereby realizing multi-station switching.

5. The new energy vehicle cable insulation layer recycled material co-extrusion molding equipment according to claim 4, characterized in that: The filter heating box assembly (21) includes a box body (211), on which a mounting through hole (212) and a slot for sliding of the screen replacement plate assembly (22) are provided; a first connecting flange (219) and a second connecting flange (216) are respectively installed on both sides of the box body (211) and are connected to the mounting through hole (212); a guide ring (217) is respectively installed in the mounting through hole (212) on the side near the first connecting flange (219). And a diffusion ring (218); the box (211) is also equipped with an annular electric heating tube (214) and a first copper pressure plate (213), the first copper pressure plate (213) is used to adjust the pressure and gap between the screen changing plate assembly (22) and the box (211); the box (211) is also equipped with an external heating plate (215), the external heating plate (215) and the annular electric heating tube (214) cooperate to achieve dual heating of the inside and outside of the box (211).

6. The new energy vehicle cable insulation layer recycled material co-extrusion molding equipment according to claim 4, characterized in that: The screen changing plate assembly (22) includes a slide plate (221), and a stable connecting block (222) is provided on the side end of the slide plate (221) and connected to the output end of the screen changing cylinder assembly (24). The slide plate (221) is provided with multiple workstations and has a perforated plate (223) embedded in it. A filter screen (224) is provided on the side of the perforated plate (223) near the first connecting flange (219). The perforated plate (223) and the filter screen (224) can be disassembled and replaced separately. The specifications of the filter screen (224) are compatible with the insulating recycled material. A second copper pressure plate (225) and a slide plate heating tube (226) are also installed on the slide plate (221).

7. A co-extrusion molding equipment for recycled material insulation layer of new energy vehicle cables according to claim 1 or 3, characterized in that: The connecting transition section (3) includes a transition section (31) and a conical pressurizing section (33). A flange-inner heating pipe (32) is provided between the transition section (31) and the conical pressurizing section (33). The structure of the transition section (31) is the same as that of the electric heater assembly (13). The inner diameter of the conical pressurizing section (33) gradually decreases along the direction of the insulating return material flow to achieve melt pressurization and flow stabilization. A melt pressure sensor (134) and a thermocouple assembly (136) are provided on the conical pressurizing section (33).

8. The new energy vehicle cable insulation layer recycled material co-extrusion molding equipment according to claim 1, characterized in that: The co-extrusion polymerization section (42) includes a conical main inlet (421), a supplementary inlet (422), and a cooling oil connecting pipe (423). The conical main inlet (421) and the supplementary inlet (422) are both connected to the internal cavity of the co-extrusion polymerization section (42). The conical main inlet (421) is used for the main polymerization coating co-extrusion of the insulation recycled material and the wire harness. The supplementary inlet (422) is used for the supplementary polymerization coating co-extrusion of the insulation recycled material and the wire harness. A cooling oil groove (424) is fitted around the internal cavity of the co-extrusion polymerization section (42). The cooling oil connecting pipe (423) is connected to the cooling oil groove (424).

9. The new energy vehicle cable insulation layer recycled material co-extrusion molding equipment according to claim 1, characterized in that: The cooling and shaping section (43) includes a sizing sleeve (431) and a fluid cooling assembly (432) for cooling and shaping the outer insulation layer of the wire harness.

10. A co-extrusion molding equipment for recycled material insulation layer of new energy vehicle cables according to claim 5, characterized in that: A guide plate is provided inside the guide ring (217), and the angle of the guide plate is 15° to 25°.

Images