Multi-mode numerical control high-temperature wire thermal shrinkage tunnel furnace

Abstract

The utility model discloses a multi-mode numerical control high-temperature wire thermal shrinkage tunnel furnace which comprises a wire conveying device, a thermal drying device and a control module. The control module is used for driving the wire rod conveying device to execute at least one motion mode, and the motion mode comprises constant-speed motion, positioning motion, interval motion and back-and-forth motion; the constant-speed motion realizes continuous and constant-speed conveying of wire rods, and guarantees the stability of a conventional thermal shrinkage process; the positioning movement enables the wire rod to be accurately suspended below the hot drying device, so that local intensified heating is realized; the multiple wires are parked according to preset intervals through interval movement, and accurate positioning is ensured; the reciprocating motion enables the pyrocondensation material of the wire rod to be heated at multiple angles, and heating dead angles are eliminated. The hot air generator is directly in butt joint with the hot air outlet part, heat loss and energy waste in a hot air transmission path can be reduced, the heat conduction efficiency is improved, and hot air acts on a target area more quickly, intensively and stably.

Description

A multi-mode CNC high-temperature wire heat shrink tunnel furnace Technical Field

[0001] This application relates to the technical field of wire and cable processing equipment, specifically a CNC multi-functional tunnel furnace for heat shrinking processing of wires, which is particularly suitable for shrinking and shaping heat shrinkable materials such as heat shrink tubing and insulating coatings on the surface of wires. Background Technology

[0002] In recent years, heat shrinking technology has been widely used in wire processing. For example, when applying heat shrink tubing, insulation layers, or other heat shrinkable materials to the surface of wires, heating is required to shrink the heat shrinkable material and tightly adhere it to the wire surface. Traditionally, tunnel ovens are used for heat drying of wires, but existing tunnel ovens have the following technical drawbacks:

[0003] Insufficient upper temperature limit: Existing tunnel furnaces mostly use ordinary heating elements or indirect heating methods, which result in a slow heating rate and a maximum temperature that can usually only reach about 175°C. This makes it difficult to meet the processing requirements of certain special materials (such as high-temperature heat-shrinkable materials or thick-walled heat-shrinkable materials), thus limiting their application range.

[0004] Existing wire conveying devices typically only support a uniform speed conveying mode and cannot adjust the wire's movement according to process requirements. For example, for heat-shrinkable materials of different diameters or materials, variable speed conveying may be required to optimize the heating effect, or reciprocating motion may be needed in local areas to achieve uniform heating. However, existing equipment lacks this flexibility, resulting in unstable processing quality or low efficiency. Summary of the Invention

[0005] The purpose of this application is to provide a multi-mode CNC high-temperature wire heat shrink tunnel oven, which can rapidly heat up to higher temperatures and supports multiple conveying modes (such as uniform speed, variable speed, and reciprocating motion) to improve the heat shrinking efficiency and quality of wire heat shrink materials.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A multi-mode CNC high-temperature wire heat-shrinking tunnel oven includes a wire conveying device, a heat-drying device, and a control module. The heat-drying device is disposed on one side of the wire conveying device. The control module is connected to the wire conveying device and is used to drive the wire conveying device to perform at least one motion mode. The motion modes include uniform motion, positioning motion, interval motion, and reciprocating motion. The heat-drying device includes a hot air outlet and a hot air generator. The hot air generator is used to generate hot air and blow it onto the heat-shrinkable material surface of the wire on the wire conveying device through the hot air outlet hole of the hot air outlet.

[0008] Furthermore, the wire conveying device includes a transmission assembly and a drive motor. The drive motor drives the transmission assembly to perform conveying motion. The drive motor is electrically connected to the control module. The control module controls the speed and direction of the drive motor to achieve uniform motion, variable speed motion, or reciprocating motion.

[0009] Furthermore, the transmission component is a conveyor net, and a support plate is provided inside the conveyor net. The support plate is provided with a clearance part corresponding to the hot air outlet of the hot drying device, and a downwardly inclined guide surface is provided near the clearance part.

[0010] Furthermore, the CNC multi-functional tunnel furnace also includes an electrical control box, the surface of which is provided with a control panel, and the control module is located inside the electrical control box.

[0011] Furthermore, the control module includes a programmable logic controller (PLC), and the control panel is used to input the motion mode command and the operating parameters of the heat drying device. The PLC synchronously controls the operation of the wire conveying device and the heat drying device according to the motion mode command and the operating parameters.

[0012] Furthermore, the hot air generator includes a blower assembly, a pressure stabilizing chamber, an electric heating element, and a guide pipe; the blower assembly is connected to one end of the buffer chamber of the pressure stabilizing chamber, and delivers airflow to the buffer chamber; the electric heating element is disposed in the guide pipe, and the other end of the guide pipe is connected to the buffer chamber; the airflow output by the blower assembly is gathered and pressurized in the buffer chamber, and then comes into contact with the electric heating element to generate hot air as it passes through the guide pipe, and is then delivered to the hot air outlet of the hot air outlet section through the guide pipe.

[0013] Furthermore, a first temperature sensor is installed inside the hot air outlet, and the first temperature sensor is electrically connected to the control module.

[0014] Furthermore, the CNC multi-functional tunnel oven also includes a lifting drive device, which is connected to the heating and drying device and is used to drive the heating and drying device to perform lifting and lowering movements.

[0015] Furthermore, the hot air drying device includes a first cooling fan, and the output terminal of the control module is electrically connected to the drive circuits of the hot air generator and the first cooling fan, respectively; the control module also includes a shutdown protection switch, the output terminal of which is electrically connected to the input terminal of the control module; a time-delay relay is provided in the control module, and the time-delay disconnection contact of the time-delay relay is connected in series with the drive circuit of the first cooling fan; when the shutdown protection switch is triggered, the power switch of the hot air generator is immediately disconnected, and the contact of the time-delay relay remains closed for a preset time.

[0016] Furthermore, the interior of the hot air outlet is provided with an air outlet chamber, and the lower port of the air outlet chamber is provided with a hot air guide section. The hot air guide section includes multiple horizontally arranged arc-shaped guide plates, and the concave surface of the arc-shaped guide plates faces the air inlet of the air outlet chamber.

[0017] The beneficial effects of this application are as follows:

[0018] (1) This application uses a control module to drive the wire conveying device to perform one of the following motion modes: uniform motion, positioning motion, interval motion, and reciprocating motion. Based on this, multiple processing modes are extended to achieve process flexibility and precise control:

[0019] Uniform speed motion mode: Through the cooperation of the control module and the drive mechanism of the conveying device, the wire is continuously and uniformly conveyed, ensuring the stability of conventional heat shrinking process and avoiding uneven heating caused by speed fluctuations in traditional equipment.

[0020] Positioning motion mode: The control module controls the wire conveying device to precisely pause below the heat drying device (e.g., pause for 5 seconds), combined with the direct blowing of hot air outlets, to achieve enhanced heating of the wire heat shrink material area, which is suitable for the fixed-point processing of wire joints and thick-walled heat shrink materials.

[0021] Intermittent motion mode: The intermittent motion mode drives the wire conveying device to move intermittently in segments (for example, conveying a fixed distance every 5 seconds), so that multiple wires stop sequentially under the heat drying device at preset intervals on the conveyor belt, ensuring the precise positioning of each wire heat shrink material.

[0022] Reciprocating motion mode: The servo motor drives the conveyor belt to reciprocate along the guide rail. With the real-time feedback of the position sensor, the heat shrinkable material of the wire is heated from multiple angles in the heat drying area, completely eliminating the dead angle of heating on one side. It is especially suitable for irregularly shaped wires or high-precision heat shrinking requirements.

[0023] (2) The hot air generator of this application is directly connected to the hot air outlet, which can reduce heat loss and energy waste in the hot air transmission path, improve heat conduction efficiency, and make the hot air act on the target area more quickly, concentrated and stable. Compared with the traditional indirect heating method, the heat transfer efficiency is greatly improved, and it can handle high temperature heat shrinkable materials, which can expand the application range of the equipment. Attached Figure Description

[0024] Figure 1 is a schematic diagram of the structure of a wire covered with heat-shrinkable material according to an embodiment of this application;

[0025] Figure 2 is a three-dimensional structural schematic diagram of a multi-mode CNC high-temperature wire heat shrink tunnel furnace provided in an embodiment of this application;

[0026] Figure 3 is a top view of a multi-mode CNC high-temperature wire heat shrink tunnel furnace provided in an embodiment of this application;

[0027] Figure 4 is a cross-sectional view of Figure 3 at point AA;

[0028] Figure 5 is a magnified view of part A in Figure 4;

[0029] Figure 6 is a cross-sectional view of a hot drying apparatus provided in an embodiment of this application;

[0030] Figure 7 is a magnified view of part B in Figure 6;

[0031] Figure 8 is a schematic diagram of the structure of an arc-shaped guide plate provided in an embodiment of this application;

[0032] Explanation of reference numerals in the attached figures:

[0033] Q, wire; W, heat-shrinkable material;

[0034] 100. Wire conveying device; 200. Heat drying device; 300. Control module; 400. Electrical control box; 500. Frame; 600. Housing; 700. Wire cooling device; 800. Control panel; 900. Lifting drive device;

[0035] 110. Transmission assembly; 120. Drive motor;

[0036] 210. Hot air outlet; 220. Hot air generator; 230. First temperature sensor; 240. First cooling fan;

[0037] 111. Conveyor mesh; 112. Support plate; 113. Alternating section; 114. Guide surface;

[0038] 221. Blower assembly; 222. Voltage stabilizing chamber; 223. Heating element; 224. Flow guide pipe;

[0039] 2241. Flow deflector; 2242. Surrounding part; 2243. Flow channel;

[0040] 211. Air outlet chamber; 212. Hot air guide section; 2121. Arc-shaped guide plate;

[0041] 410. Shutdown protection switch;

[0042] 213. First thermal insulation section; 214. Second thermal insulation section;

[0043] 910. First mounting bracket; 920. Guide assembly; 930. Lifting drive assembly;

[0044] 931. Drive handwheel; 932. Lead screw; 933. Nut; Detailed Implementation

[0045] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0046] In the description of this application, it should be understood that the terms "upper," "lower," "left," "right," etc., are used only for the convenience of describing this application 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, and therefore should not be construed as a limitation on this application. In particular, the understanding of the term "upper" following a noun in the claims should be understood as meaning that the entire inner and outer surfaces of the structure referred to by the noun conform to the definition of "upper."

[0047] The following detailed description, in conjunction with the accompanying drawings and preferred embodiments, describes the specific implementation methods, structures, features, and effects provided in this application.

[0048] As shown in Figure 1, a multi-mode CNC high-temperature wire heat shrinking tunnel oven is used to heat-dry the heat shrinkable material W on the wire Q to shrink it onto the wire Q.

[0049] As shown in Figure 2, in this embodiment, the multi-mode CNC high-temperature wire heat shrink tunnel oven includes a wire conveying device 100, a heat drying device 200, a control module 300, an electrical control box 400, a frame 500, and a housing 600.

[0050] As shown in Figure 4, the heat drying device 200 is installed on one side of the wire conveying device 100 via the frame 500 and is located above the wire conveying device 100. It is used to heat dry the heat-shrinkable material of the wire. The outer shell 600 is used to cover the heat drying device 200 to prevent the heat generated by the heat drying device 200 from spreading outward and to prevent the operator from touching the heat drying device 200 and getting burned. The electrical control box 400 is located below the wire conveying device 100, and the control module 300 is located inside the electrical control box 400.

[0051] The control module 300 of this application is connected to the wire conveying device 100 and is used to drive the wire conveying device 100 to perform at least one motion mode. The motion modes include uniform motion, positioning motion, interval motion and reciprocating motion. The heat drying device 200 includes a hot air outlet 210 and a hot air generator 220. The hot air generator 220 is used to generate hot air and blow it onto the surface of the heat shrinkable material of the wire on the wire conveying device 100 through the hot air outlet hole of the hot air outlet 210.

[0052] The working principle is as follows: The wire enters the tunnel oven through the conveyor. The control module 300 first performs a positioning motion to calibrate the initial position of the wire, ensuring that the heating area is aligned with the target processing section. The hot air generator 220 starts synchronously. After reaching the set temperature, the control module 300 connects to the wire conveyor 100 and drives the wire conveyor 100 according to the set motion mode. When the heat-shrinkable material of the wire needs to be processed, the control module 300 will, according to preset instructions, make the wire conveyor 100 perform uniform speed movement, allowing the wire to pass through the heating area at a stable speed; or perform positioning motion to accurately position the heat-shrinkable material of the wire in a specific position for heating; or perform interval motion, allowing the heat-shrinkable material of the wire to enter the heating area sequentially at certain intervals; or perform reciprocating motion, allowing the heat-shrinkable material of the wire to move back and forth within the heating area to meet different processing requirements. The hot air generator 220 in the hot air drying device 200 generates hot air, which is blown onto the surface of the heat-shrinkable material of the wire on the wire conveying device 100 through the hot air outlet of the hot air outlet 210. The heat of the hot air is transferred to the surface of the heat-shrinkable material, causing the heat-shrinkable material on the surface of the wire to shrink, thereby achieving the purpose of heat shrinking the wire heat-shrinkable material. By controlling parameters such as the power of the hot air generator 220, the temperature and flow rate of the hot air can be adjusted to meet the heat shrinking processing requirements of heat-shrinkable materials of different types and specifications of wire.

[0053] The tunnel furnace in this embodiment achieves deep synergy between motion mode and heating process through the coupling mechanism of "control module 300 precisely driving wire movement and heat drying device 200 directional heat conduction". It can dynamically adjust the wire movement trajectory and hot air parameters according to the heat shrinking and processing requirements of different wire heat shrink materials, and finally achieve the goal of efficient, precise and multifunctional heat treatment.

[0054] The control module 300 is essentially a programmable logic controller (PLC) or industrial computer system integrated within the electrical control box 400. Its main functions include: Multi-mode motion control: Connected to the wire conveying device 100, it drives the wire to execute four motion modes: uniform speed, positioning, interval, and reciprocating, achieving precise displacement control of the wire in the hot drying area. Process parameter control: Setting the hot air parameters of the hot drying device 200. Human-machine interaction and monitoring: Receiving user commands via a touchscreen or remote interface, displaying real-time equipment status (such as temperature, speed, and fault alarms), and storing historical data for quality traceability. Its hardware architecture typically includes a main control chip (such as ARM or DSP), a communication interface (RS485 / Modbus), and a drive circuit (such as a servo motor controller). For example, in positioning motion, the control module 300 adjusts the pulse output of the servo motor in real time through encoder feedback to ensure precise wire positioning.

[0055] As shown in Figure 4, in one embodiment, the wire conveying device 100 includes a transmission assembly 110 and a drive motor 120. The drive motor 120 drives the transmission assembly 110 to move and convey the wire. The drive motor 120 is electrically connected to the control module 300. The control module 300 controls the speed and direction of the drive motor 120 to achieve uniform motion, variable speed motion, or reciprocating motion.

[0056] The transmission assembly 110 includes, but is not limited to, a conveyor belt, a conveyor net 111, a transmission roller assembly, or a combination thereof, for carrying and driving the wire through the heat-drying area. Those skilled in the art can select an appropriate transmission form according to the characteristics of the wire and the requirements of the heat-shrinking process.

[0057] As shown in Figure 5, the transmission assembly 110 uses a conveyor net 111. Specifically, the conveyor net 111 has mesh openings that allow hot air to pass through. A support plate 112 is installed inside the conveyor net 111. The support plate 112 has a clearance part 113 at the hot air outlet of the heat drying device 200. A downwardly inclined guide surface 114 is provided near the clearance part 113. The clearance part 113 faces the hot air outlet, forming a "direct hot air channel" to prevent the solid structure of the support plate 112 from blocking the hot air jet path. The inclination angle of the guide surface 114 is coordinated with the hot air outlet direction (e.g., when the hot air blows downward, the guide surface 114 tilts downward to guide the airflow diffusion), which can reduce the airflow turbulence at the edge of the clearance part 113, so that the hot air forms a more uniform velocity field before contacting the heat shrinkable material of the wire, avoiding sudden changes in local wind speed caused by the boundary effect of the support plate 112. The avoidance part 113 ensures that the hot air reaches the heat shrink material of the wire with "zero loss". With the wire positioning of the guide surface 114, the heat shrink material is always in the core coverage area of ​​the hot air when passing through the hot baking area, which can shorten the heating time.

[0058] In one embodiment, the conveyor mesh 111 is made of a high-temperature resistant material, including but not limited to stainless steel, nickel-chromium alloy, alumina ceramic fiber, aluminum silicate ceramic fiber, Teflon, quartz fiber, etc., to adapt to the high-temperature environment of the heat-shrink tunnel oven.

[0059] In one embodiment, the drive motor 120 is a servo motor. By using a servo motor as the drive motor 120, its high-precision positioning, fast response, precise speed control, high reliability, and flexible programmability are utilized to ensure the efficient and stable operation and high-quality processing of the wire heat shrink tunnel oven.

[0060] As shown in Figure 2, in one embodiment, the surface of the electrical control box 400 is provided with a control panel 800, and the control module 300 is disposed inside the electrical control box 400.

[0061] In one embodiment, the control module 300 includes a programmable logic controller (PLC), and the control panel 800 is used to input the motion mode command and the operating parameters of the heat drying device 200. The PLC synchronously controls the operation of the wire conveying device 100 and the heat drying device 200 according to the motion mode command and the operating parameters.

[0062] As shown in Figure 6, in one embodiment, the hot air generator 220 includes a blower assembly 221, a pressure stabilizing chamber 222, an electric heating element 223, and a guide pipe 224. The blower assembly 221 is connected to one end of the buffer chamber of the pressure stabilizing chamber 222 and delivers airflow to the buffer chamber. The electric heating element 223 is disposed in the guide pipe 224, and the other end of the guide pipe 224 is connected to the buffer chamber. After the airflow output by the blower assembly 221 is gathered and pressurized in the buffer chamber, it comes into contact with the electric heating element 223 and is heated to generate hot air when passing through the guide pipe 224. The hot air is then delivered to the hot air outlet of the hot air outlet section 210 through the guide pipe 224.

[0063] The airflow output from the blower assembly 221 first passes through the buffer chamber of the pressure stabilizing cavity 222 to concentrate and pressurize the airflow, stabilizing its velocity and avoiding pressure fluctuations caused by pulsed airflow, thus providing a stable air pressure foundation for subsequent uniform heating. The airflow then enters the guide pipe 224, making full contact with the built-in heating element 223. The heating element 223 can be a heating tube, achieving direct heat transfer through efficient convection heat exchange, reducing heat loss and improving heating efficiency. Simultaneously, the guide pipe 224 optimizes the airflow path to extend the residence time, ensuring uniform hot air temperature. The three-stage series structure of "blower assembly 221 → pressure stabilizing cavity 222 → guide pipe 224" forms a "pressurization-heating-guide" synergistic link, enhancing heat conduction depth by stabilizing airflow kinetic energy and reducing pressure drop through direct connection between the pipe outlet and the hot air outlet, allowing the hot air to act on the surface of the wire heat-shrinkable material with precise parameters. Furthermore, the modular design facilitates the replacement of the heating element 223 and the frequency conversion adjustment of the blower assembly 221, adapting to different temperature and airflow requirements.

[0064] As shown in Figures 6 and 7, in one embodiment, a guide plate 2241 is provided at the air outlet of the guide pipe 224, and a surrounding edge 2242 is provided around the air outlet. Multiple guide grooves 2243 are provided on the surrounding edge 2242. The guide plate 2241 guides the hot air to concentrate into the hot air outlet 210, avoiding diffusion loss; the surrounding edge 2242 forms a pressure-concentrating space, stabilizing the internal air pressure and reducing overflow, ensuring that the airflow reaches the air outlet with uniform pressure; the guide grooves 2243 divide the airflow into multiple fine streams, homogenizing the flow field distribution, so that the hot air velocity and temperature blown out of the bottom air outlet are consistent, significantly improving the uniformity of heating the surface of the heat-shrinkable wire material, and adapting to the precise processing needs of wires of different specifications.

[0065] As shown in Figures 6 and 8, in one embodiment, the hot air outlet 210 is provided with an air outlet chamber 211 inside, and a hot air guide section 212 is provided at the lower port of the air outlet chamber 211. The hot air guide section 212 includes multiple horizontally arranged arc-shaped guide plates 2121, and the concave surface E of the arc-shaped guide plate 2121 faces the air inlet R of the air outlet chamber 211.

[0066] As shown in Figure 8, the concave surface of the arc-shaped guide plate 2121 facing the air inlet causes the hot air entering the air outlet chamber 211 at high speed to first hit the inner side of the arc-shaped plate and be forced to spread evenly to both sides, redistributing the high-speed airflow in the central area to the edge area, and finally the uniform hot air is blown out towards the lower port of the air outlet chamber 211.

[0067] Multiple horizontally arranged arc-shaped air guide plates 2121 cover the entire air outlet width, ensuring that the heat-shrinkable wire material receives an equal amount of hot air across its entire width, thus solving the problems of overheating in the middle and underheating at the edges caused by traditional single-sided air intake.

[0068] The arc-shaped guide vane 2121 ensures stable laminar flow during airflow guidance, avoiding the vortex zone caused by the right-angle guide vane 2241. This significantly improves the effective utilization rate of hot air.

[0069] A hot air guide plate 2122 is installed on the left side of the air outlet chamber 211, corresponding to the air inlet R. This guide plate directs the airflow blowing towards the side of the air outlet chamber 211 towards the arc-shaped guide plate. By regulating the airflow direction, the hot air guide plate 2122 allows the airflow to smoothly transition to the arc-shaped guide plate 2121, reducing turbulence and resistance losses, thereby reducing system operating energy consumption and improving energy efficiency.

[0070] As shown in Figure 5, in one embodiment, a first temperature sensor 230 is installed inside the hot air outlet 210, and the first temperature sensor 230 is electrically connected to the control module 300. A preset threshold value for the heat-drying device 200 is input through the control module 300. The control module 300 is configured to cut off the power supply to the wire conveying device 100 when the detected value of the first temperature sensor 230 is lower than the preset threshold. The temperature of the hot air outlet 210 is monitored in real time by the first temperature sensor 230 and compared with the preset threshold. When the detected value is lower than the preset threshold, it indicates that the hot air temperature has not reached the expected level. Cutting off the power supply to the wire conveying device 100 at this time prevents the heat-shrinkable material of the wire from entering the heat-drying device 200 and failing to be fully heat-shrinked when the hot air temperature is insufficient, thereby ensuring the heat-shrinkable quality of the wire material and ensuring that the heating effect meets the requirements.

[0071] In one embodiment, the heat drying device 200 is disposed above the wire conveying device 100, and a hot air outlet 210 is arranged above the conveying device to blow hot air downwards onto the heat-shrinkable material of the wire, utilizing the characteristics of gravity and the natural downward flow of hot air to cover the upper surface and sides of the wire.

[0072] In one embodiment, a heating device 200 is arranged below the conveying device to heat the heat-shrinkable material of the wire upwards, thereby improving the heat conduction efficiency of the lower surface and the sides by utilizing the principle of hot air rising.

[0073] In one embodiment, hot air outlets 210 are arranged at both the top and bottom to form a symmetrical heating structure. Hot air acts on the heat-shrinkable material of the wire from both sides simultaneously to form a surround heating and improve heating efficiency.

[0074] As shown in Figure 4, in one embodiment, the hot air drying device 200 includes a first cooling fan 240, and the output terminal of the control module 300 is electrically connected to the drive circuits of the hot air generator and the first cooling fan 240, respectively. The control module 300 also includes a shutdown protection switch 410, the output terminal of which is electrically connected to the input terminal of the control module 300. A time-delay relay is provided in the control module 300, and the time-delay disconnection contact of the time-delay relay is connected in series with the drive circuit of the first cooling fan 240. When the shutdown protection switch 410 is triggered, the power switch of the hot air generator is immediately disconnected, and the contact of the time-delay relay remains closed for a preset time.

[0075] As shown in Figure 6, in one embodiment, a first heat insulation part 213 and a second heat insulation part 214 are sequentially arranged on the outer periphery of the hot air outlet 210. The inner insulation layer (first heat insulation part 213): close to the hot air outlet 210, uses a high-temperature resistant, low-thermal-conductivity material to reduce heat diffusion to the surrounding environment; the outer insulation layer (second heat insulation part 214): further wraps insulation material around the outside of the first insulation layer, forming a double-layer barrier. This is particularly effective against heat loss caused by external air convection, concentrating heat in the heat-shrinkable material heating area of ​​the wires and avoiding ineffective energy consumption. The double-layer insulation keeps the outer surface temperature of the outlet within a safe range, preventing thermal damage to nearby electronic components and mechanical parts. When the hot air drying device 200 is running, the surface temperature of the exposed hot air duct can reach over 100°C, posing a risk of burns to operators during debugging and maintenance.

[0076] As shown in Figure 4, in one embodiment, the CNC multi-functional tunnel oven further includes a lifting drive device 900, which is connected to the heating and drying device 200 and is used to drive the heating and drying device 200 to perform lifting and lowering movements. For wires of different diameters (e.g., from Φ1mm thin wire to Φ50mm thick cable), the height of the heating and drying device 200 is adjusted via a lead screw 932 / cylinder / motor to ensure that the hot air outlet and the surface of the heat-shrinkable material of the wire are always kept at the optimal working distance.

[0077] As shown in Figure 4, specifically, the lifting drive device 900 includes a first mounting frame 910, a guide assembly 920, and a lifting drive assembly 930. The hot drying device 200 is mounted on the first mounting frame 910 via the guide assembly 920, and the lifting drive assembly 930 is mounted on the first mounting frame 910 to drive the hot drying device 200 to move up and down along the guide assembly 920.

[0078] Specifically, the guide assembly 920 includes a guide post and a guide sleeve. The guide post is fixedly mounted on the first mounting bracket 910 in the vertical direction. The guide post is fixedly connected to the hot drying device 200 and slidably assembled on the guide sleeve to guide the lifting and lowering movement of the hot drying device 200.

[0079] In one embodiment, the lifting drive assembly 930 includes a lead screw drive motor, a lead screw, and a nut. The drive motor 120 is fixed to the top of the first mounting bracket 910. The lead screw is coaxially connected to the output shaft of the drive motor and is vertically arranged. The drive motor drives the heating device 200 to lift and lower through the lead screw and the nut.

[0080] As shown in Figure 4, in one embodiment, the lifting drive assembly 930 includes a drive handwheel 931, a lead screw 932, and a nut 933. The drive handwheel 931 is fixed to the top of the first mounting bracket 910 by the nut 933. The drive handwheel 931 is mounted on the upper end of the lead screw 932. The lower end of the lead screw 932 is connected to the heating device 200. The drive handwheel 931 drives the heating device 200 to lift and lower through the lead screw 932 and the nut 933.

[0081] In one embodiment, the lifting drive assembly 930 is a cylinder or an electric push rod. The cylinder body of the cylinder or the fixed end of the electric push rod is connected to the first mounting bracket 910, and the piston rod of the cylinder or the push rod end of the electric push rod is fixedly connected to the heating device 200.

[0082] As shown in Figure 4, in one embodiment, the CNC multi-functional tunnel furnace further includes a wire cooling device 700, which is disposed on the discharge side of the hot drying device 200 and aligned with the wire conveying device 100; the wire cooling device 700 includes a cooling component, which is used to cool the hot-dried wire and heat-shrinkable material.

[0083] In one embodiment, the wire cooling device 700 is a second cooling fan, which is fixed to the sides, above or below the wire conveying device 100 by a bracket.

[0084] The embodiments described above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make several improvements and substitutions without departing from the technical principles of this application, and these improvements and substitutions should also be considered within the scope of protection of this application.

Claims

1. A multi-mode CNC high temperature wire heat shrinkage tunnel furnace characterized by: The device includes a wire conveying device, a heat drying device, and a control module. The heat drying device is located on one side of the wire conveying device. The control module is connected to the wire conveying device and is used to drive the wire conveying device to perform at least one motion mode, including uniform motion, positioning motion, interval motion, and reciprocating motion. The heat drying device includes a hot air outlet and a hot air generator. The hot air generator is used to generate hot air and blow it onto the heat-shrinkable material surface of the wire on the wire conveying device through the hot air outlet of the hot air outlet.

2. A multi-mode CNC high temperature wire heat shrinkage tunnel furnace as claimed in claim 1, wherein: The wire conveying device includes a transmission assembly and a drive motor. The drive motor drives the transmission assembly to perform conveying motion. The drive motor is electrically connected to the control module. The control module controls the speed and direction of the drive motor to achieve uniform motion, variable speed motion, or reciprocating motion.

3. A multi-mode CNC high temperature wire heat shrinkage tunnel furnace as claimed in claim 2, wherein: The transmission component is a conveyor net, and a support plate is provided inside the conveyor net. The support plate is provided with a clearance part corresponding to the hot air outlet of the hot drying device, and a downwardly inclined guide surface is provided near the clearance part.

4. A multi-mode CNC high temperature wire heat shrinkage tunnel furnace as claimed in claim 1, wherein: The CNC multi-functional tunnel furnace also includes an electrical control box, the surface of which is equipped with a control panel, and the control module is located inside the electrical control box.

5. A multi-mode CNC high temperature wire heat shrinkage tunnel furnace as claimed in claim 4, wherein: The control module includes a programmable logic controller (PLC). The control panel is used to input the motion mode command and the operating parameters of the heat drying device. The PLC synchronously controls the operation of the wire conveying device and the heat drying device according to the motion mode command and the operating parameters.

6. A multi-mode digitally controlled high temperature wire heat shrink tunnel furnace as claimed in claim 1, wherein: The hot air generator includes a blower assembly, a pressure stabilizing chamber, an electric heating element, and a guide pipe. The blower assembly is connected to one end of the buffer chamber of the pressure stabilizing chamber, and delivers airflow to the buffer chamber. The electric heating element is disposed in the guide pipe, and the other end of the guide pipe is connected to the buffer chamber. After the airflow output by the blower assembly is gathered and pressurized in the buffer chamber, it comes into contact with the electric heating element and is heated to generate hot air when passing through the guide pipe. The hot air is then delivered to the hot air outlet of the hot air outlet section through the guide pipe.

7. A multi-mode CNC high-temperature wire heat shrink tunnel furnace according to claim 1, characterized in that: A first temperature sensor is installed inside the hot air outlet, and the first temperature sensor is electrically connected to the control module.

8. A multi-mode CNC high-temperature wire heat shrink tunnel furnace according to claim 1, characterized in that: The CNC multi-functional tunnel oven also includes a lifting drive device, which is connected to the heating device and is used to drive the heating device to perform lifting movements.

9. A multi-mode CNC high-temperature wire heat shrink tunnel furnace according to claim 1, characterized in that: The hot air drying device includes a first cooling fan, and the output terminal of the control module is electrically connected to the drive circuits of the hot air generator and the first cooling fan, respectively. The control module also includes a shutdown protection switch, the output terminal of which is electrically connected to the input terminal of the control module. A time-delay relay is provided in the control module, and the time-delay disconnection contact of the time-delay relay is connected in series with the drive circuit of the first cooling fan. When the shutdown protection switch is triggered, the power switch of the hot air generator is immediately disconnected, and the contact of the time-delay relay remains closed for a preset time.

10. A multi-mode CNC high temperature wire heat shrinkage tunnel furnace as claimed in claim 1, wherein: The hot air outlet is provided with an air outlet chamber inside. The lower port of the air outlet chamber is provided with a hot air guide section. The hot air guide section includes multiple horizontally arranged arc-shaped guide plates, and the concave surface of the arc-shaped guide plates faces the air inlet of the air outlet chamber.

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