Continuous extrusion coating line
By using a continuous extrusion coating production line, the armor layer and core material can be produced continuously, which solves the problems of low production efficiency and high cost in the existing technology, and realizes continuous production of the armor layer and ensures product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI AINUO METAL MATERIALS CO LTD
- Filing Date
- 2025-06-25
- Publication Date
- 2026-07-21
AI Technical Summary
In existing technologies, the preparation of armor layers and insulating layers cannot be carried out continuously, resulting in low production efficiency and high costs.
The continuous extrusion coating production line includes a continuous extrusion coating mechanism, an online cooling unit, an online diameter reduction unit, and a traction mechanism. The armor layer is continuously produced through a continuous extruder and extrusion die, and after cooling, it is drawn and reduced in diameter to make the armor layer fit the core material.
This enables continuous production of the armor layer, avoiding damage to the insulation layer caused by direct contact between the armor layer and the core material, and ensuring product concentricity and production efficiency.
Smart Images
Figure CN224536788U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of conductive component preparation technology, and more specifically, to a continuous extrusion coating production line. Background Technology
[0002] Conductive components constitute a significant portion of the cost of high-voltage connector wiring harnesses in electric vehicles. They are primarily used to connect battery packs and generators, as well as to charge the battery packs. Current generation conductive components include a metal conductive core, an insulating layer covering the metal conductive core, and an armor layer covering the insulating layer. The insulating layer blocks current, while the armor layer provides waterproofing, protection, and magnetic shielding.
[0003] Existing technology first prepares the armor layer sleeve, then fits the sleeve over the conductive component covered with the insulating layer, and finally uses a drawing die to make the armor layer fit tightly against the insulating layer, thus completing the armor layer coating. However, in the existing technology, the armor layer sleeve and the insulating conductive component are prepared separately, and the drawing process to make the armor layer fit tightly against the insulating layer needs to be carried out separately. The entire preparation process cannot achieve continuous production, resulting in low production efficiency and high cost. Utility Model Content
[0004] The purpose of this invention is to overcome the above-mentioned defects in the existing technology and provide a continuous extrusion coating production line to realize the continuous production of armor layers.
[0005] To achieve the above objectives, the technical solution of this utility model is as follows:
[0006] A continuous extrusion coating production line includes a continuous extrusion coating mechanism, an online cooling unit, an online diameter reduction unit, and a traction mechanism arranged sequentially. Core material and armor blank are conveyed to the continuous extrusion coating mechanism, which continuously extrudes the armor blank to obtain an armor layer and coats it onto the core material to obtain an armored conductive component. The online cooling unit cools the armored conductive component. The online diameter reduction unit reduces the diameter of the armor layer, bonding it to the core material. The traction mechanism traction the reduced-diameter armored conductive component.
[0007] The continuous extrusion coating mechanism includes a continuous extruder and an extrusion die. The continuous extruder includes an extrusion roller and an extrusion roller shoe. The extrusion roller has an extrusion roller groove, and the extrusion roller and extrusion roller shoe form an extrusion cavity. The extrusion roller shoe has a die opening, and the extrusion roller shoe is connected to the extrusion die. The extrusion die includes an inner die and an outer die fitted outside the inner die. The center of the inner die has a through hole for the core material to pass through. An annular extrusion cavity is provided between the outer die and the inner die. The inlet of the annular extrusion cavity is connected to the die opening. There is a gap between the outlet of the annular extrusion cavity and the outlet of the through hole, and the outlet of the annular extrusion cavity is parallel to the outlet of the through hole. The armored blank is conveyed to the extrusion roller groove, enters the extrusion cavity, is continuously extruded, and passes through the annular extrusion cavity to obtain a closed annular armored layer. The core material is suspended in the closed annular armored layer.
[0008] Implementing the embodiments of this utility model will have the following beneficial effects:
[0009] This embodiment of the utility model includes a continuous extrusion coating production line comprising, in sequence, a continuous extrusion coating mechanism, an online cooling unit, an online diameter reduction unit, and a traction mechanism. The continuous extrusion coating mechanism includes a continuous extruder and an extrusion die. The extrusion die includes an inner die and an outer die. The inner die has a through hole for the core material to pass through. An annular extrusion cavity is provided between the outer die and the inner die. A gap is provided between the outlet of the annular extrusion cavity and the outlet of the through hole, and the outlet of the annular extrusion cavity is parallel to the outlet of the through hole. After being extruded by the continuous extruder, the armored billet passes through the annular extrusion cavity to obtain a closed annular armor layer. The core material is suspended within the armor layer to form an armored conductive component. After cooling, the armored conductive component is drawn and its diameter reduced, so that the armor layer adheres to the core material. This embodiment of the utility model achieves continuous production. The fact that the armor layer is not adhered to the core material after extrusion prevents damage to the core material's insulation layer. The traction mechanism pulls the armored conductive component to ensure the concentricity of the core material. Attached Figure Description
[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0011] in:
[0012] Figure 1 This is a schematic diagram of a continuous extrusion coating production line provided in an embodiment of the present invention.
[0013] Figure 2 This is a schematic diagram of an extrusion die provided in an embodiment of the present invention.
[0014] Figure 3 This is a schematic diagram of an online diameter reduction unit provided in an embodiment of this utility model.
[0015] Figure 4 This is another schematic diagram of the continuous extrusion coating production line provided in this embodiment of the utility model.
[0016] 1-Continuous extrusion coating mechanism; 11-Extrusion die; 111-Inner die; 112-Outer die; 113-Annular extrusion cavity; 114-Through hole; 2-Online cooling unit; 3-Online diameter reduction unit; 31-Diameter reduction die; 311-Diameter reduction channel; 32-Cooling water tank; 33-Clamping mechanism; 4-Traction mechanism; 5-Armored billet conveying mechanism; 51-Armored billet unloading assembly; 52-Armored billet traction assembly; 53-Armored billet straightening assembly; 54-Armored billet cleaning assembly; 6-Core material conveying mechanism; 61-Core material unloading assembly; 62-Core material traction assembly; 63-Core material straightening assembly; 64-Core material cleaning assembly; 7-Guiding assembly; 8-Self-adjusting guiding unit; 9-Guiding winding mechanism. Detailed Implementation
[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0018] Reference Figure 1 , Figure 2 This utility model discloses a continuous extrusion coating production line, comprising a continuous extrusion coating mechanism 1, an online cooling unit 2, an online diameter reduction unit 3, and a traction mechanism 4 arranged sequentially. The core material and the armor blank are conveyed to the continuous extrusion coating mechanism 1, which continuously extrudes the armor blank to obtain an armor layer that coats the core material, thus obtaining an armored conductive component. The online cooling unit 2 is used to cool the armored conductive component. The online diameter reduction unit 3 is used to reduce the diameter of the armor layer, bonding it to the core material. The traction mechanism 4 is used to traction the reduced-diameter armored conductive component.
[0019] The continuous extrusion coating mechanism 1 includes a continuous extruder and an extrusion die 11. The continuous extruder includes an extrusion roller and an extrusion roller shoe. The extrusion roller has an extrusion roller groove. The extrusion roller and the extrusion roller shoe form an extrusion cavity. The extrusion roller shoe has a die opening. The extrusion roller shoe and the extrusion die 11 are connected. The extrusion die 11 includes an inner die 111 and an outer die 112 sleeved outside the inner die 111. The center of the inner die 111 has a through hole 114 for the core material to pass through. An annular extrusion cavity 113 is provided between the outer die 112 and the inner die 111. The inlet of the annular extrusion cavity 113 is connected to the die opening. There is a gap between the outlet of the annular extrusion cavity 113 and the outlet of the through hole 114. The outlet of the annular extrusion cavity 113 is parallel to the outlet of the through hole 114. The armored blank is conveyed to the extrusion roller groove, enters the extrusion cavity, is continuously extruded, and passes through the annular extrusion cavity 113 to obtain a closed annular armored layer. The core material is suspended in the closed annular armored layer.
[0020] It should be noted that in this embodiment, the core material enters the continuous extruder through the through hole 114 in the center of the inner die 111. The armored billet is continuously extruded into the extrusion cavity through the extrusion wheel groove, and then enters the annular extrusion cavity 113 through the die opening. The annular closed armored layer is obtained through the annular extrusion cavity 113. The core material and the armored billet enter the continuous extrusion coating mechanism 1 simultaneously, and the armored layer is obtained through continuous extrusion, realizing continuous production.
[0021] The core material can be a metallic conductive component or an insulating conductive component covered with an insulating layer. The conductive component can be made of copper, aluminum, silver, steel, copper alloy, aluminum alloy, etc., and its shape can be a conductive rod or a conductive busbar. The armor layer provides waterproofing, protection, and magnetic shielding, and can be an aluminum armor layer, steel armor layer, etc. When the core material is an insulating conductive component, the armor layer is exposed to high temperatures during extrusion through the annular extrusion chamber 113. Directly covering the insulating layer with the armor layer could easily damage it. In this embodiment, a gap is provided between the outlet of the annular extrusion chamber 113 and the outlet of the through hole 114, and the outlets of the annular extrusion chamber 113 and the through hole 114 are parallel. Therefore, after extrusion, the armor layer does not completely adhere to the core material, and the core material is suspended within the closed annular armor layer, preventing the armor layer from contacting the core material and damaging the insulating layer.
[0022] After the armor layer and the core material are cooled together in the online cooling unit 2, the armor layer is then reduced in diameter by the online diameter reduction unit 3. After the armor layer is reduced in diameter, the thickness remains basically unchanged. The reduction in the outer diameter of the armor layer is converted into an increase in the length of the armor layer. After the outer diameter of the armor layer is reduced, the armor layer adheres to the insulation layer.
[0023] A traction mechanism 4 is set after the online diameter reduction unit 3. The traction mechanism 4 tightens the core material and continuously conveys the core material forward to ensure that the core material moves in a straight line and ensures the concentricity of the core material.
[0024] It is understood that the continuous extrusion coating production line in this embodiment includes a continuous extrusion coating mechanism 1, an online cooling unit 2, an online diameter reduction unit 3, and a traction mechanism 4 arranged in sequence. The continuous extrusion coating mechanism 1 includes a continuous extruder and an extrusion die 11. The extrusion die 11 includes an inner die 111 and an outer die 112. The inner die 111 is provided with a through hole 114 for the core material to pass through. An annular extrusion cavity 113 is provided between the outer die 112 and the inner die 111. There is a gap between the outlet of the annular extrusion cavity 113 and the outlet of the through hole 114, and the outlet of the annular extrusion cavity 113 is parallel to the outlet of the through hole 114. After the armored billet is extruded by the continuous extruder, it passes through the annular extrusion cavity 113 to obtain an annular closed armored layer. The core material is suspended in the armored layer to obtain an armored conductive component. After the armored conductive component is cooled, it is drawn and reduced in diameter so that the armored layer adheres to the core material. This embodiment enables continuous production. The fact that the armor layer is not bonded to the core material after extrusion can prevent the insulation layer of the core material from being burned. The traction mechanism 4 pulls the armor conductive parts to ensure the concentricity of the core material.
[0025] In some alternative embodiments, refer to Figure 3 The online diameter reduction unit 3 includes a diameter reduction mold 31, and the armor layer is bonded to the core material after being reduced in diameter by the diameter reduction mold 31.
[0026] In one specific embodiment, the diameter reduction die 31 is provided with a diameter reduction channel 311 for the armored conductive component to pass through. The diameter reduction channel 311 includes a variable diameter section and a fixed diameter section connected in sequence. The inner diameter of the variable diameter section gradually decreases along the drawing direction, while the inner diameter of the fixed diameter section remains unchanged along the drawing direction. The main function of the variable diameter section is to provide extrusion pressure to reduce the outer diameter. The main function of the fixed diameter section is to shape the outer contour size of the armor layer and to make the outer surface of the armor layer smooth. The die angle of the diameter reduction die is 5°~15°, which is the angle between the inner surface of the variable diameter section of the diameter reduction die 31 and the central axis of the diameter reduction die 31.
[0027] In one specific embodiment, the number of diameter reduction molds 31 is two or more. Since heat is generated during the diameter reduction process of the armor layer, by setting two or more diameter reduction molds 31, multiple diameter reductions are performed respectively to avoid excessively high temperatures causing grain growth, which would lead to a decrease in material strength and hardness.
[0028] Along the drawing direction, the die angle of the diameter reduction channel 311 of each diameter reduction die 31 gradually decreases, that is, the compression zone half angle of the diameter reduction die becomes smaller as it goes further, the deformation is smaller, and it is easier to correct local deformation errors, improve the dimensional control accuracy of irregular structure corners, grooves and other areas, thereby improving the overall dimensional accuracy of the product's outer contour.
[0029] Preferably, the die angle of the first diameter reduction die along the drawing direction is 5°~15°, and the die angle of each subsequent diameter reduction die is reduced by 0°~3° compared to the previous one.
[0030] Along the drawing direction, the length of the sizing section of each reducing die 31 gradually decreases to reduce frictional resistance. Specifically, the length of the sizing section of the first reducing die is 3mm to 16mm, and the length of the sizing section of the last reducing die is 1mm to 8mm.
[0031] Furthermore, the online diameter reduction unit 3 also includes a cooling water tank 32, with the diameter reduction mold 31 located inside the cooling water tank 32. Coolant is placed inside the cooling water tank 32 to cool the diameter reduction mold 31. By setting up the cooling water tank 32, the coolant cools the armored conductive parts, further preventing the material strength and hardness from decreasing due to excessively high temperatures during the diameter reduction process of the armor layer.
[0032] Furthermore, the online diameter reduction unit 3 also includes a clamping mechanism 33 located in front of the cooling water tank. Because the diameter reduction mold 31 has very high resistance, the armored conductive component cannot pass through it before being clamped by the traction mechanism 4. Therefore, a traction rope needs to be placed at the clamping mechanism 33. When the armored conductive component is transferred to the clamping mechanism 33, the traction rope is placed on it. The clamping mechanism 33 includes octopus-shaped clamping claws, which clamp the traction rope to the armor layer, creating a mechanical connection. Subsequently, the traction mechanism 4 pulls the traction rope, which in turn pulls the armored conductive component through the diameter reduction mold 31. After the armored conductive component passes through the traction mechanism 4, the end clamped with the traction rope can be cut off.
[0033] In some optional embodiments, two extrusion wheel grooves are provided in parallel on the extrusion wheel, and two die openings are provided on the extrusion wheel shoe. The two die openings are respectively connected to the annular extrusion cavity 113. Two armored billets are respectively entered into one extrusion wheel groove for continuous extrusion and are respectively extruded into the annular extrusion cavity 113 through one die opening.
[0034] Understandably, compared to a single armored blank, two armored blanks are more likely to form a closed ring after extrusion, reducing the product defect rate. The extrusion roller has two parallel extrusion grooves. The two armored blanks are extruded on one extrusion roller and then enter the annular extrusion chamber 113 through the die openings on the extrusion shoe. This eliminates the need for two extrusion rollers to extrude the two armored blanks, reducing the space occupied by the continuous extrusion coating mechanism 1 and saving costs.
[0035] In some alternative embodiments, refer to Figure 4 The continuous extrusion coating production line also includes a core material conveying mechanism 6 and two parallel armored billet conveying mechanisms 5. The core material conveying mechanism 6 is used to transfer the core material to the continuous extrusion coating mechanism 1, and the armored billet conveying mechanism 5 is used to transfer the armored billet to the continuous extrusion coating mechanism 1.
[0036] Furthermore, the armored billet conveying mechanism 5 includes an armored billet feeding assembly 51, an armored billet traction assembly 52, an armored billet straightening assembly 53, and an armored billet cleaning assembly 54 arranged sequentially.
[0037] The armored billet feeding assembly 51 includes a wire reel and a guide wheel assembly. The feeding device continuously and stably releases the armored billet and adjusts the feeding tension through the guide wheel assembly to ensure the continuity of material supply and the accuracy of speed synchronization at the front end of the production line.
[0038] The armored billet traction assembly 52 is a traction machine that provides the power for the armored billet to move forward.
[0039] The armor blank straightening assembly 53 is a straightening machine, which includes a transverse straightening unit and a longitudinal straightening unit to ensure the straightness of the armor blank before it enters the continuous extrusion and coating mechanism 1.
[0040] The armor blank cleaning assembly 54 includes one or more of a first cleaning unit, a second cleaning unit, and a third cleaning unit. The first cleaning unit is used to roughen the surface of the armor blank, which can remove stubborn stains and surface oxide scale. The second cleaning unit smooths the surface of the armor blank, removing powder and solid particles. The smoothing treatment can also prevent solid particles from being stored in the pores or gaps of the rough surface, thus affecting the quality of the extruded material. The third cleaning unit cleans the surface of the armor blank by using liquid to clean the surface of the armor blank.
[0041] The first cleaning unit includes a first rotating brush and a second rotating brush located on both sides of the armor blank. The first rotating brush and the second rotating brush rotate around the armor blank, and at the same time, the first rotating brush and the second rotating brush can also rotate around their own rotation axis.
[0042] The second cleaning unit includes a rotating disk, a brush holder, and a brush. The armor blank passes through the center of the rotating disk, which rotates around the armor blank. There are two or more brush holders, which are evenly distributed and fixed on the circumference of the rotating disk and rotate together with the rotating disk. The brush is fixed on the brush holder and performs rotating brushing on the armor blank.
[0043] The third cleaning unit includes a water tank, with an inlet for the armored blank to enter and an outlet for it to exit on its front and rear sides, respectively. Multiple nozzles are arranged inside the water tank along the extension direction of the armored blank, and these nozzles spray water to clean the surface of the armored blank. Preferably, the third cleaning unit is an ultrasonic water washing unit.
[0044] Preferably, the armor blank cleaning assembly 54 further includes a blowing unit for blowing away powder or water. When the armor blank cleaning assembly 54 includes two or more of the first cleaning unit, second cleaning unit, and third cleaning unit, a blowing unit can be provided after each cleaning unit.
[0045] Preferably, the armored billet cleaning assembly 54 further includes a heating unit, which is located after the blowing unit. After the armored billet is heated, the metal plasticity is increased, the deformation resistance is reduced, thereby reducing the hardness requirements of the extrusion die material, the deformation uniformity is increased to facilitate filling the extrusion die and cavity, the extrusion temperature is increased, thereby increasing the solid solubility, and the material is in a high-energy state, which is conducive to the precipitation of the second phase during subsequent aging. When the armored billet cleaning assembly 54 is provided with a third cleaning unit, the heating unit is set to further remove the surface moisture of the armored billet, so as to prevent the undried moisture from being carried into the extruder and causing defects such as bulging due to evaporation of moisture into gas.
[0046] Preferably, the continuous extrusion coating production line further includes a guide component 7, which is disposed after the armored blank cleaning component 54. Alternatively, when the armored blank conveying mechanism 5 further includes a blowing unit, the guide component 7 is disposed after the blowing unit, and the guide component 7 guides the armored blank to the core material line.
[0047] Furthermore, the core material conveying mechanism 6 includes a core material feeding assembly 61, a core material traction assembly 62, a core material straightening assembly 63, and a core material cleaning assembly 64 arranged sequentially.
[0048] The core material feeding assembly 61 includes a wire reel and a guide wheel assembly. The feeding device continuously and stably releases the core material and adjusts the feeding tension through the guide wheel assembly to ensure the continuity of material supply and the accuracy of speed synchronization at the front end of the production line.
[0049] The core material traction assembly 62 is a traction machine that provides the power for the core material to move forward.
[0050] The core material straightening assembly 63 is a straightening machine, which includes a transverse straightening unit and a longitudinal straightening unit to ensure the straightness of the core material before it enters the continuous extrusion and coating mechanism 1.
[0051] When the core material is a metallic conductive component, the core material cleaning assembly 64 may include one or more of a first cleaning unit, a second cleaning unit, and a third cleaning unit. The first cleaning unit, the second cleaning unit, and the third cleaning unit are the same as those in the armored blank cleaning assembly 54, and will not be described again here. When the core material is an insulating conductive component, the core material cleaning assembly 64 is only provided with a third cleaning unit.
[0052] In some alternative embodiments, refer to Figure 4 The continuous extrusion coating production line also includes a self-adjusting guide unit 8, which is located between the online cooling unit 2 and the online diameter reduction unit 3. The self-adjusting guide unit 8 adjusts the conveying speed of the cooled armored conductive parts.
[0053] Specifically, the self-adjusting guide unit 8 includes a support frame, a lever arm, and a guide wheel. One end of the lever arm is rotatably connected to the support frame, and the other end of the lever arm is fixed to the guide wheel. The guide wheel has gravity, and under its own weight, it tends to move downwards. When the armored conductive wire is loose, the guide wheel moves downwards; when the armored conductive wire is tight, the guide wheel moves upwards. The self-adjusting guide unit 8 then automatically adjusts the transmission speed according to the conveying speed of the armored conductive component. The large resistance of the diameter reduction mold 31 will affect the transmission speed of the armored conductive component. Therefore, setting up the self-adjusting guide unit 8 before the online diameter reduction unit 3 can ensure the smooth operation of the production line.
[0054] In some alternative embodiments, refer to Figure 4 Following the traction mechanism 4 is a guide winding mechanism 9, which is used to wind up the armored conductive component.
[0055] Specifically, the guiding and winding mechanism 9 includes a guide wheel assembly unit and a winding unit. The guide wheel assembly unit includes multiple sets of guide wheels, through which the armored conductive component is guided into the winding unit for winding, ensuring smooth winding. The winding unit includes a reel and a reel lateral displacement drive, which moves the reel back and forth in a lateral direction perpendicular to the movement direction of the armored conductive component to wind up the wire.
[0056] In some alternative embodiments, an online sawing and collecting mechanism (not shown) is also included after the traction mechanism 4, which is used to cut and collect the armored conductive parts.
[0057] Specifically, the online sawing and collection mechanism includes a sawing machine, a drive mechanism, and a collection mechanism. The drive mechanism drives the sawing machine to move in the direction of movement of the armored conductive component. During the movement, the sawing machine completes the cutting of the armored conductive component to a quantitative length, and the collection mechanism collects the cut armored conductive component.
[0058] In some alternative embodiments, the continuous extrusion coating production line also includes a detection mechanism (not shown in the figure), which is disposed between the traction mechanism 4 and the guide winding mechanism 9, or between the traction mechanism 4 and the online sawing and collecting mechanism.
[0059] Specifically, the inspection mechanism includes one or more of the following: diameter measuring unit, meter measuring unit, thickness measuring unit, and visual inspection unit. The diameter measuring unit detects the outer diameter of the armor layer in real time through laser diffraction or CCD imaging; the meter measuring unit accurately measures the length of the armor conductive components; the thickness measuring unit is used to measure the thickness of the armor layer, and its detection source can be ultrasound, X-ray, laser, current, etc.; the visual inspection unit is used to detect surface defects in the armor layer.
[0060] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A continuous extrusion coating production line, characterized in that, The system includes a continuous extrusion coating mechanism, an online cooling unit, an online diameter reduction unit, and a traction mechanism arranged sequentially. The core material and the armor blank are conveyed to the continuous extrusion coating mechanism, which continuously extrudes the armor blank to obtain an armor layer that coats the core material, resulting in an armored conductive component. The online cooling unit cools the armored conductive component. The online diameter reduction unit reduces the diameter of the armor layer, attaching it to the core material. The traction mechanism pulls the reduced-diameter armored conductive component. The continuous extrusion coating mechanism includes a continuous extruder and an extrusion die. The continuous extruder includes an extrusion roller and an extrusion roller shoe. The extrusion roller has an extrusion roller groove, and the extrusion roller and extrusion roller shoe form an extrusion cavity. The extrusion roller shoe has a die opening, and the extrusion roller shoe is connected to the extrusion die. The extrusion die includes an inner die and an outer die fitted outside the inner die. The center of the inner die has a through hole for the core material to pass through. An annular extrusion cavity is provided between the outer die and the inner die. The inlet of the annular extrusion cavity is connected to the die opening. There is a gap between the outlet of the annular extrusion cavity and the outlet of the through hole, and the outlet of the annular extrusion cavity is parallel to the outlet of the through hole. The armored blank is conveyed to the extrusion roller groove, enters the extrusion cavity, is continuously extruded, and passes through the annular extrusion cavity to obtain a closed annular armored layer. The core material is suspended in the closed annular armored layer.
2. The continuous extrusion coating production line according to claim 1, characterized in that, The online diameter reduction unit includes a diameter reduction mold; the diameter reduction mold is provided with a diameter reduction channel for the armored conductive component to pass through, the diameter reduction channel includes a variable diameter section and a fixed diameter section connected in sequence, the inner diameter of the variable diameter section gradually decreases along the drawing direction, and the inner diameter of the fixed diameter section remains unchanged along the drawing direction. The die angle of the diameter reduction die is 5°~15°.
3. The continuous extrusion coating production line according to claim 2, characterized in that, The number of the diameter reduction molds is two or more; Along the drawing direction, the die angle of the diameter reduction channel of each of the diameter reduction dies gradually decreases, and the length of the sizing section of each of the diameter reduction dies gradually decreases. The length of the sizing section of the first diameter reduction die is 3mm to 16mm, and the length of the sizing section of the last diameter reduction die is 1mm to 8mm.
4. The continuous extrusion coating production line according to claim 2 or 3, characterized in that, The online diameter reduction unit includes a cooling water tank, the diameter reduction mold is located inside the cooling water tank, and coolant is placed inside the cooling water tank to cool the diameter reduction mold.
5. The continuous extrusion coating production line according to claim 4, characterized in that, The extrusion roller has two parallel extrusion roller grooves, and the extrusion roller shoe has two die openings. The two die openings are respectively connected to the annular extrusion cavity. The two armored blanks enter one of the extrusion roller grooves for continuous extrusion and are extruded into the annular extrusion cavity through one of the die openings.
6. The continuous extrusion coating production line according to claim 5, characterized in that, It also includes a core material conveying mechanism and two parallel armored billet conveying mechanisms. The core material conveying mechanism is used to transfer the core material to the continuous extrusion and coating mechanism, and the armored billet conveying mechanism is used to transfer the armored billet to the continuous extrusion and coating mechanism.
7. The continuous extrusion coating production line according to claim 6, characterized in that, The core material conveying mechanism includes a core material feeding assembly, a core material traction assembly, a core material straightening assembly, and a core material cleaning assembly arranged in sequence. The armored billet conveying mechanism includes an armored billet feeding assembly, an armored billet traction assembly, an armored billet straightening assembly, and an armored billet cleaning assembly arranged in sequence.
8. The continuous extrusion coating production line according to claim 1, characterized in that, It also includes a self-adjusting guide unit, which is disposed between the online cooling unit and the online diameter reduction unit, and the self-adjusting guide unit adjusts the conveying speed of the armored conductive component after cooling.
9. The continuous extrusion coating production line according to claim 8, characterized in that, Following the traction mechanism is a guide winding mechanism, which is used to wind up the armored conductive component; Alternatively, an online sawing and collecting mechanism may be included after the traction mechanism, which is used to cut and collect the armored conductive component.
10. The continuous extrusion coating production line according to claim 9, characterized in that, It also includes a detection mechanism, which is disposed between the traction mechanism and the guiding winding mechanism, or the detection mechanism is disposed between the traction mechanism and the online sawing and collecting mechanism; The detection mechanism includes one or more of the following: diameter measuring unit, meter measuring unit, thickness measuring unit, and visual inspection unit.