Continuous extrusion production line equipment

Abstract

This utility model discloses a continuous extrusion production line device, including a first tension mechanism, an online preheating mechanism, an extrusion coating mechanism, an online cooling mechanism, and a second tension mechanism arranged sequentially. A metal conductive core enters the extrusion coating mechanism and is coated with an insulating layer to obtain an insulated conductive component. The online preheating mechanism, located before the extrusion coating mechanism, preheats the metal conductive core, ensuring a tight bond between the preheated metal conductive core and the extruded high-temperature insulating layer, enabling continuous production. By linking the first and second tension mechanisms to form a closed-loop tension control, the synchronization error of the linear speed before and after coating the metal conductive core with the insulating layer is reduced, ensuring the concentricity of the metal conductive core during forward transport and preventing uneven thickness caused by eccentricity of the coating insulating layer.

Description

Technical Field

[0001] This utility model relates to the field of conductive component preparation technology, and more specifically, to a continuous extrusion production line device. 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 the battery pack and generator, as well as to charge the battery pack. Current generation conductive components consist of a metal conductive core surrounded by an insulating layer. This insulating layer blocks current, preventing the human body or external conductors from becoming electrified upon contact.

[0003] Existing methods for coating an insulating layer onto a metal conductive core using an extruder include: first, using an extruder to cover the insulating material onto the outer layer of the metal conductive core; then, cooling and shaping the insulating coating; and finally, using heating and compaction processes to fully bond the insulating layer and the metal conductive core. However, in existing technologies, the heating and compaction processes are separate processes and cannot be continuously processed together with the extrusion coating and cooling and shaping, resulting in low production efficiency and high labor costs. 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 production line device that not only realizes the continuous production of the coating layer, but also tightly integrates the coating layer with the metal conductive core.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A continuous extrusion production line apparatus, comprising:

[0007] A first tension mechanism is used to pull the metal conductive core.

[0008] An online preheating mechanism is used to heat the metal conductive core;

[0009] An extrusion coating mechanism is used to extrude an insulating layer onto the heated metal conductive core to obtain an insulating conductive component;

[0010] An online cooling mechanism is used to cool the insulating conductive component;

[0011] The second tension mechanism is used to pull the cooled insulating conductive component.

[0012] Implementing the embodiments of this utility model will have the following beneficial effects:

[0013] In this embodiment of the invention, a metal conductive core enters an extrusion coating mechanism and is coated with an insulating layer to obtain an insulating conductive component. An online preheating mechanism is set up before the extrusion coating mechanism to preheat the metal conductive core. The preheated metal conductive core and the extruded high-temperature insulating layer can bond tightly together, enabling continuous production. By setting up a first tension mechanism and a second tension mechanism in conjunction to form a closed-loop tension control, the synchronization error of the linear velocity before and after the metal conductive core is coated with the insulating layer is reduced, ensuring the concentricity of the metal conductive core during forward conveying and preventing uneven thickness caused by eccentricity of the coated insulating layer. Attached Figure Description

[0014] 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.

[0015] in:

[0016] Figure 1 This is a schematic diagram of a continuous extrusion production line device provided in an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of an online preheating mechanism provided in an embodiment of this utility model.

[0018] Figure 3 This is another schematic diagram of the continuous extrusion production line device provided in this utility model embodiment.

[0019] 1-First tension mechanism, 2-Online preheating mechanism, 21-Metal tube coil, 22-Channel, 201-Coolant outlet, 202-Coolant outlet, 3-Extrusion coating mechanism, 4-Online cooling mechanism, 5-Second tension mechanism, 6-Heating mechanism, 7-Online cleaning mechanism, 8-Unwinding mechanism, 9-Straightening mechanism, 10-Online power frequency spark test mechanism, 11-Online metering mechanism, 12-Guiding winding mechanism, 13-Online diameter measuring mechanism. Detailed Implementation

[0020] 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.

[0021] Reference Figure 1This utility model discloses a continuous extrusion production line device, including a first tension mechanism 1, an online preheating mechanism 2, an extrusion coating mechanism 3, an online cooling mechanism 4, and a second tension mechanism 5 arranged in sequence.

[0022] The first tension mechanism 1 is used to pull the metal conductive core, the online preheating mechanism 2 is used to heat the metal conductive core, the extrusion coating mechanism 3 is used to extrude the insulating layer onto the heated metal conductive core to obtain an insulating conductive component, the online cooling mechanism 4 is used to cool the insulating conductive component, and the second tension mechanism 5 is used to pull the cooled insulating conductive component.

[0023] It should be noted that in this embodiment, the metal conductive core is pulled by the first tension mechanism 1 and heated by the online preheating mechanism 2 before entering the extrusion coating mechanism 3. At the same time, insulating particles are added into the extrusion coating mechanism 3. The extrusion coating mechanism 3 extrudes the insulating particles into an insulating layer and coats it onto the metal conductive core to obtain an insulating conductive component. The insulating conductive component is pulled by the second tension mechanism 5 and cooled in the online cooling mechanism 4.

[0024] Furthermore, both the first tension mechanism 1 and the second tension mechanism 5 are commercially available traction machines. The traction machine includes a pinch roller group, a drive system, and a control module. The metal conductive core or the insulating conductive component is pinched between the rollers. The drive system controls the traction speed through the control module, which is synchronized with the rotation speed of the extrusion coating mechanism 3.

[0025] Furthermore, the extrusion coating mechanism 3 is a commercially available extrusion coating machine 3 comprising components such as a hopper, screw, barrel, die head, and mold. The hopper is used to load the insulating plastic raw material. The screw, through rotation and propulsion, crushes, softens, melts, plasticizes, degasses, and compacts the plastic raw material within the barrel, continuously extruding the plasticized melt. The die head converts the rotating plastic melt into parallel linear motion, uniformly and smoothly guiding it into the die sleeve and applying the necessary molding pressure to the plastic. The mold includes an orifice and a core mold. The orifice forms the outer diameter of the insulating layer, and the core mold forms the inner diameter of the insulating layer. The core mold has a die hole at its center for the metal conductive core to pass through, thereby allowing the insulating layer to be coated onto the metal conductive core by the extrusion coating machine 3.

[0026] It is understood that in this embodiment, the metal conductive core is preheated by setting an online preheating mechanism 2 so that the preheated metal conductive core can be tightly bonded to the extruded high-temperature insulation layer and can be produced continuously.

[0027] By setting the first tension mechanism 1 and the second tension mechanism 5 to form a closed-loop tension control, the synchronization error of the linear speed before and after the metal conductive core is covered with the insulation layer is reduced, ensuring the concentricity of the metal conductive core during forward conveying and preventing the insulation layer from becoming eccentric and causing uneven thickness.

[0028] In some alternative embodiments, refer to Figure 2 The online preheating mechanism 2 includes a metal tube coil 21 and a temperature sensor (not shown in the figure).

[0029] The metal tube coil 21 is composed of a spirally wound metal tube. The metal tube coil 21 has a channel 22 for the passage of the metal conductive core. When a high-frequency AC power is applied to the metal tube coil 21, the metal conductive core is heated by the cutting magnetic field through the channel 22. A temperature sensor is set on the outlet side of the channel 22 and is used to detect the temperature of the metal conductive core.

[0030] Understandably, when the metal conductive core passes through the online preheating mechanism 2, its movement cuts the magnetic field, and the metal coil 21 generates heat to heat the metal conductive core. The metal conductive core is not heated if it does not pass through the online preheating mechanism 2, thus achieving automatic online heating. The temperature of the metal conductive core is monitored in real time by a temperature sensor, and based on the feedback temperature data, the heating of the metal conductive core to the preset temperature can be controlled.

[0031] Furthermore, the temperature sensor employs an infrared thermometer to detect the temperature of the preheated metal conductive core in a non-contact manner, thereby ensuring that the preheating requirements are met to adapt to the needs of subsequent coating processes.

[0032] Furthermore, the metal tube is a hollow tube with a coolant flow channel inside. The metal tube is also equipped with a coolant inlet 201 and a coolant outlet 202 that are respectively connected to the coolant flow channel. The coolant flows in the coolant flow channel to regulate the temperature of the metal tube.

[0033] In some optional embodiments, the online cooling mechanism 4 includes a cooling water tank and an air-cooling device disposed after the cooling water tank. A support roller is disposed inside the cooling water tank, and a metal conductive core is transmitted forward from the support roller. There is a gap between the cooling water tank and the extrusion coating mechanism 3.

[0034] It is understandable that, in order to improve the bonding strength between the insulating layer and the metal conductive core, the cooling rate of the insulating layer should be reduced and the bonding time between the insulating layer and the conductive core should be extended.

[0035] In this embodiment, there is a gap between the cooling water tank and the extrusion coating mechanism 3, so the insulating conductive component is transported forward in the air and cooled by air first; a support roller is set inside the cooling water tank, and the insulating conductive component moves on the support roller, and finally the insulating conductive component is cooled by the air cooling device. By setting gradient cooling, the cooling rate of the insulation layer is reduced, and the bonding strength between the insulation layer and the metal conductive core is improved.

[0036] Specifically, the metal conductive core can be located above or below the coolant level in the cooling water tank. When the metal conductive core is below the coolant level, cooling time is saved and the production line length is reduced. When the metal conductive core is above the coolant level, the insulating conductive component is not immersed in the coolant, which reduces the cooling rate and improves the bonding strength.

[0037] In some alternative embodiments, refer to Figure 3 The continuous extrusion production line also includes a heating mechanism 6, which is located between the extrusion coating mechanism 3 and the online cooling mechanism 4. The heating mechanism 6 is used to heat the insulation layer after extrusion.

[0038] It is understandable that the extrusion coating mechanism 3 is prone to wrinkles and roughness on the surface of the insulation layer due to jamming during extrusion. By setting up the heating mechanism 6 to reheat and soften the insulation layer, the wrinkles are smoothed out, making the surface of the insulation layer smooth and improving the product yield.

[0039] Furthermore, the heating mechanism 6 is an oven, which has openings at the front and back for the passage of insulating conductive parts.

[0040] In some alternative embodiments, refer to Figure 3 The continuous extrusion production line device also includes an online cleaning mechanism 7, which is located between the first tension mechanism 1 and the online preheating mechanism 2. The online cleaning mechanism 7 is used to remove stains from the surface of the metal conductive core and enhance the bonding strength between the insulation layer and the conductor.

[0041] For example, the online cleaning mechanism 7 includes an online polishing unit and a blowing unit arranged sequentially. The online polishing unit is used to mechanically polish the surface of the metal conductive core, and the blowing unit is used to remove the waste residue after polishing. The online polishing unit may include a wheel brush cleaning assembly and / or a pen brush cleaning assembly.

[0042] Preferably, the online polishing unit includes a wheel brush cleaning component and a brush cleaning component, with the first tension mechanism 1, the wheel brush cleaning component, the brush cleaning component, and the blower unit arranged in sequence.

[0043] The wheel brush cleaning assembly includes rotating wheel brushes that scrub the surface of the metal conductive core. The wheel brush assembly provides coarse friction to the metal blank, primarily to roughen the surface and remove stains and / or scale.

[0044] The brush cleaning assembly includes two or more brush heads arranged around a metal conductive core, which rotate and brush the metal conductive core. The brush cleaning assembly further polishes the surface of the metal conductive core, making the surface smooth, and removes large pieces of waste material polished by the rotary brush cleaning assembly.

[0045] The blowing unit includes a ring body through which the metal blank passes. The inner wall of the ring body has blowing ports that clean the metal conductive core that has been removed by the wheel brush cleaning assembly and the pen brush cleaning assembly. This dual-stage physical cleaning further improves the cleanliness of the metal conductive core surface. For example, the online cleaning mechanism 7 includes an online washing unit and a drying unit arranged sequentially. The online washing unit is used to wash away waste residue from the surface of the metal conductive core, and the drying unit removes water from the surface of the metal conductive core. The online washing unit can be a water cleaning device and / or an ultrasonic cleaning device.

[0046] The water cleaning device includes a water tank. As the metal conductive core passes through the water tank, deionized water is sprayed into the tank to clean it. Compared to the water cleaning device, the ultrasonic cleaning device further includes an ultrasonic generator and a transducer. The transducer receives the high-frequency electrical signal emitted by the ultrasonic generator, generates high-frequency mechanical vibration, and transmits the vibration to the deionized water, removing contaminants from the surface of the metal conductive core and improving cleanliness.

[0047] For example, the online cleaning mechanism 7 includes an online polishing unit, a water washing unit, and a drying unit, with the first tension mechanism 1, the online polishing unit, the water washing unit, and the drying unit arranged in sequence.

[0048] Understandably, the online cleaning unit 7 uses physical cleaning methods and / or chemical cleaning agents to remove contaminants, oxide layers, and particulate impurities from the surface of the metal conductive core, ensuring the interface bonding strength and product reliability of subsequent processes such as preheating and coating.

[0049] In some alternative embodiments, refer to Figure 3 The continuous extrusion production line device also includes an unwinding mechanism 8, which is located in front of the first tension mechanism 1. The unwinding mechanism 8 is used to unwind the wound metal conductive core.

[0050] Understandably, the wire feeding device includes a wire reel and a guide wheel assembly. The wire feeding device continuously and stably releases the metal conductive core and adjusts the wire 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.

[0051] In some alternative embodiments, refer to Figure 3 The continuous extrusion production line device also includes a straightening mechanism 9, which is located between the first tension mechanism 1 and the online preheating mechanism 2. The straightening mechanism 9 straightens the metal conductive core.

[0052] Specifically, the straightening mechanism 9 is a straightening machine, which includes a horizontal straightening unit and a vertical straightening unit to ensure the straightness of the metal conductive core before it enters the extrusion coating mechanism 3.

[0053] Understandably, the straightening mechanism 9 eliminates the bending stress of the metal conductive core, and the straightening process can further ensure the concentricity of the coating.

[0054] In some alternative embodiments, refer to Figure 3 A detection unit is provided after the second tension mechanism 4. The detection unit includes one or more of the following: online power frequency spark test mechanism 10, online measurement mechanism 11, thickness gauge, and visual inspection instrument.

[0055] In one specific embodiment, the detection unit includes an online power frequency spark test mechanism 10, which is used to test whether the insulation layer of the insulating conductive component is leaking current.

[0056] Furthermore, the testing unit also includes an online measuring mechanism 11, which is located after the online power frequency spark test mechanism 10. The online measuring mechanism 11 is used to measure the length of the insulating conductive parts.

[0057] Furthermore, the online metrology unit 11 is further equipped with a thickness gauge and a visual inspection instrument. The thickness gauge is used to measure the thickness of the insulation layer, and its detection source can be ultrasound, X-ray, laser, current, etc.; the visual inspection instrument is used to detect surface defects of the insulation layer.

[0058] Furthermore, a guide winding mechanism 12 is included after the detection unit, which is used to wind up the insulating conductive component.

[0059] Specifically, the guiding and winding mechanism 12 includes a self-adjusting guiding unit, a guide wheel assembly unit, and a winding unit.

[0060] The self-adjusting guide unit 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, the guide wheel tends to move downward. When the metal insulation wire is loose, the guide wheel moves downward; when the metal insulation wire is tight, the guide wheel moves upward. The self-adjusting guide unit then automatically adjusts the winding speed according to the conveying speed of the insulating conductive parts.

[0061] The guide wheel unit includes multiple sets of guide wheels. The insulated conductive parts, which are adjusted by the self-adjusting guide unit, enter the winding unit for winding through the conductive wheel set, ensuring smooth winding.

[0062] The winding unit includes a reel and a reel lateral displacement drive, which moves back and forth in a lateral direction perpendicular to the direction of movement of the insulating conductive component to wind up the wire.

[0063] Optionally, a cutting and collecting mechanism (not shown in the figure) can be installed after the detection unit. The cutting and collecting mechanism is used to cut and collect the insulating conductive parts. The cutting and collecting mechanism includes a sawing machine, a driving mechanism, and a collecting mechanism. The driving mechanism drives the sawing machine to move in the direction of movement of the insulating conductive parts. During the movement, the sawing machine completes the cutting of the insulating conductive parts to a fixed length, and the collecting mechanism collects the cut insulating conductive parts.

[0064] In some alternative embodiments, refer to Figure 3 The continuous extrusion production line also includes an online diameter measuring mechanism 13, which is located between the online cooling mechanism 4 and the second tension mechanism 5. The diameter measuring device detects the outer diameter of the insulation layer of the insulating conductive component in real time through laser diffraction or CCD imaging.

[0065] 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 production line device, characterized in that, Including the following components arranged in sequence: A first tension mechanism for pulling the metal conductive core; An on-line preheating mechanism for heating the metal conductive core; An extrusion coating mechanism for extruding and coating an insulating layer on the heated metal conductive core to obtain an insulated conductive component; An on-line cooling mechanism for cooling the insulated conductive component; A second tension mechanism for pulling the cooled insulated conductive component.

2. The continuous extrusion production line device according to claim 1, wherein The on-line preheating mechanism includes: A metal tube coil formed by helically winding a metal tube. A channel for the metal conductive core to pass through is provided inside the metal tube coil. When a high-frequency alternating current power supply is applied to the metal tube coil, the metal conductive core passing through the channel is heated by cutting the magnetic field; A temperature sensor arranged on the outlet side of the channel for detecting the temperature of the metal conductive core.

3. The continuous extrusion production line device according to claim 1, wherein, The on-line cooling mechanism includes a cooling water tank and an air-cooling device arranged after the cooling water tank. Support rollers are provided inside the cooling water tank, and the metal conductive core moves forward on the support rollers. There is a gap between the cooling water tank and the extrusion coating mechanism.

4. The continuous extrusion production line device according to any one of claims 1 to 3, characterized in that, It further includes a heating mechanism arranged between the extrusion coating mechanism and the on-line cooling mechanism for heating the extruded insulating layer.

5. The continuous extrusion production line device according to claim 4, wherein, It further includes an on-line cleaning mechanism arranged between the first tension mechanism and the on-line preheating mechanism for removing stains on the surface of the metal conductive core.

6. The continuous extrusion production line device according to claim 5, wherein It further includes an unwinding mechanism arranged before the first tension mechanism for unwinding the wound metal conductive core.

7. The continuous extrusion production line device according to claim 6, wherein It further includes a straightening mechanism arranged between the first tension mechanism and the on-line preheating mechanism for straightening the metal conductive core.

8. The continuous extrusion production line device according to claim 7, characterized in that, It further includes an on-line diameter measuring mechanism arranged between the on-line cooling mechanism and the second tension mechanism for detecting the outer diameter of the insulating layer of the insulated conductive component.

9. The continuous extrusion production line device according to claim 8, wherein, A detection unit is provided after the second tension mechanism. The detection unit includes one or more of an on-line power frequency spark test mechanism, an on-line metering mechanism, a thickness gauge, and a visual inspection instrument; The on-line power frequency spark test mechanism is used to test whether the insulating layer is leaking electricity. The on-line metering mechanism is used to measure the length of the insulated conductive component. The thickness gauge is used to measure the thickness of the insulating layer. The visual inspection instrument is used to detect surface defects of the insulating layer.

10. The continuous extrusion production line device according to claim 9, characterized in that, A guiding and winding mechanism is further included after the detection unit for winding the insulated conductive component; Alternatively, a cutting and collecting mechanism is further included after the detection unit for cutting and collecting the insulated conductive component.

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