Foaming mold for automobile wire harness production

Abstract

The application discloses a foaming die for automobile wire harness production and relates to the technical field of automobile wire harness production.The foaming die comprises a support, a controller arranged on the support, a foaming unit arranged on the support, an adjusting unit arranged on the foaming unit, a supporting frame and an adjusting frame of the support, a die cavity and a forming groove of the foaming unit, a mounting piece, a driving piece and a gas extraction piece of the adjusting unit, two grooves with different lengths arranged on the driving piece, fixed connections between the adjusting frame and the die cavity, fixed connections between the die cavity and the mounting piece, and a connection between the die cavity and the gas extraction piece through a pipeline.The die cavity is combined after the wire harness is placed in the forming groove, a worker can adjust the height of the adjusting frame to reach the injection material device below to inject material, the injection process can automatically improve the flash and gas trapping problems existing in the die cavity through the driving piece on the mounting piece and the gas extraction piece, so that the forming quality is ensured.

Description

Technical Field

[0001] This invention relates to the field of automotive wiring harness manufacturing technology, specifically a foaming mold for automotive wiring harness manufacturing. Background Technology

[0002] In automotive wiring harness production, foaming molds are commonly used to coat the wire harness with a foamed protective layer, and these molds typically employ a left and right chamber structure. With increasingly stringent environmental regulations, the recycling of plastic waste has become an industry trend, leading to the gradual introduction of recycled plastic particles into foaming raw materials. However, the flowability, foaming rate, and gas release behavior of recycled plastics differ from those of virgin materials, resulting in significant shortcomings in existing sequential injection molding processes.

[0003] The left chamber has an exhaust structure for venting air and foaming gas. Recycled plastic tends to generate more gas during the foaming process and its fluidity increases. When the material is injected from left to right, if the left chamber exhausts too much, the foam can easily be squeezed into the exhaust channel, forming a flash defect. After the material is injected into the left chamber, a large amount of air is still present in the right chamber. When the material is injected into the right chamber, it can easily cause excessive gas to be unable to be discharged, forming a trapped gas defect.

[0004] Therefore, it is urgent to improve the structure of foaming molds to adapt to the characteristics of raw materials containing recycled plastic components, and simultaneously solve the problems of flash and trapped air, thereby improving molding quality and the recycling rate of plastic waste. Summary of the Invention

[0005] The technical problem to be solved by the present invention is the problem of flash and air trapping in the foaming molding of automotive wire harnesses, and provides a foaming mold for automotive wire harness production.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A foaming mold for automotive wiring harness production includes a bracket, a controller mounted on the bracket, a foaming unit mounted on the bracket, and an adjustment unit mounted on the foaming unit. The support frame includes a support frame and an adjustment frame, which are slidably connected. The foaming unit includes a mold cavity and a molding groove; The adjustment unit includes a mounting component, a driving component, and an air extraction component. The mounting component is provided with the driving component and the air extraction component, and the driving component is provided with two grooves of different lengths. The adjusting frame is fixedly connected to the mold cavity, the mold cavity is fixedly connected to the mounting component, and the mold cavity is connected to the air extraction component through a conduit.

[0007] Furthermore, the driving component includes a drive motor, a pull rod, a return spring, and a valve stem. The telescopic end of the drive motor is fixedly connected to the pull rod, and the other end of the pull rod is fixedly connected to the valve stem.

[0008] Furthermore, the valve stem is provided with a left exhaust groove and a right exhaust groove. The length of the left exhaust groove is the same as that of the valve stem, and the right exhaust groove is located at the end of the valve stem away from the pull rod. The length of the left exhaust groove is greater than that of the right exhaust groove.

[0009] Furthermore, the mounting components include a mounting base and a fixed box. The fixed end of the drive motor is fixedly mounted on the fixed box, one end of the pull rod is slidably connected to the fixed box, the mounting base is fixedly connected to the fixed box, and the valve stem is connected to the fixed box through a return spring.

[0010] Furthermore, the air extraction component includes an air extraction pipe, a left exhaust pipe, and a right exhaust pipe. The air extraction pipe is located at the end of the fixed box near the drive motor and is connected to an external air pump. The left exhaust pipe and the right exhaust pipe are located at the end of the fixed box near the mounting base.

[0011] Furthermore, the mold cavity is composed of a left mold cavity and a right mold cavity. Both the left and right mold cavities are provided with molding grooves. The left exhaust pipe is connected to the left mold cavity through a conduit, and the right exhaust pipe is connected to the right mold cavity through a conduit. The right mold cavity is fixedly installed on the adjustment frame. The left mold cavity is rotatably connected to the right mold cavity through a connector. The right mold cavity is fixedly connected to the mounting base.

[0012] Furthermore, the extraction device also includes an adjusting component, which includes a fixed cylinder, a buffer spring, and a conical block. The fixed cylinder is fixedly installed in the left exhaust pipe and the right exhaust pipe. The fixed cylinder is connected to the conical block through the buffer spring. The end of the conical block with the smaller diameter is placed away from the valve stem.

[0013] Furthermore, the mounting components also include an exhaust component, which includes an exhaust channel, a baffle, and a spring rod. The exhaust channel is located inside the fixed box, with one end connected to the right exhaust pipe and the other end connected to the suction pipe. The fixed box is provided with a fixing groove, and the baffle is slidably installed inside the exhaust channel. The baffle is installed in the fixing groove via the spring rod.

[0014] Furthermore, a partition is provided at the end of the fixed box away from the pull rod, and a sliding groove is provided on the valve stem, through which the valve stem is slidably connected to the partition.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, after the automotive wiring harness is fixed, the injection process is initiated. The controller drives the drive motor on the fixed box to rotate, and the valve rod moves axially within the fixed box via the pull rod, compressing the return spring. In the initial stage of injection, the left exhaust groove and the left exhaust pipe of the valve rod are continuously connected. The air pump forms a negative pressure through the air extraction pipe, continuously extracting air and foaming gas from the left mold cavity. At this time, the right exhaust pipe is blocked by the valve rod, and the right mold cavity is closed and pressure is maintained, maintaining a constant back pressure. In the middle stage of injection, the valve rod continues to move, the left mold cavity maintains unobstructed exhaust, and the right mold cavity maintains pressure. The back pressure of the right cavity forms a filling resistance difference, slowing down the filling speed of the molten material in the right mold cavity, guiding the molten material to fill the left mold cavity first, ensuring that the filling progress of the two cavities is synchronized, and preventing the molten material from moving around and causing uneven molding. In the later stage of injection, when the right mold cavity is about to be filled, the valve rod reaches the end of its stroke, the right exhaust groove and the right exhaust pipe are connected, and the two cavities open simultaneously with a large flow of exhaust, completely expelling the residual gas in the cavity, eliminating the problem of trapped air, and ensuring that the foamed layer is dense and uniform.

[0016] 2. This invention uses a buffer spring to push a conical block against a fixed cylinder under low-pressure conditions, forming a narrow gap for low-flow exhaust. This avoids excessively fast exhaust at low pressure, which could cause molten material to overflow. As the cavity pressure increases, the air pressure pushes the conical block to move, expanding the ventilation gap and increasing the exhaust flow rate, thus ensuring both high-pressure exhaust efficiency and low-pressure anti-burst requirements.

[0017] 3. When the air pressure in the right mold cavity exceeds the threshold, the high-pressure gas pushes the baffle and compresses the elastic rod through the exhaust channel to open the bypass passage for early pressure relief. After the pressure is restored, the structure automatically resets, ensuring stable operation of the process. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall appearance and structure of the present invention; Figure 2 This is a schematic diagram of the external structure of the left and right mold cavities of the present invention; Figure 3 This is a schematic diagram of the installation position of the molding groove according to the present invention; Figure 4 This is a schematic diagram of the external structure of the mounting component of the present invention; Figure 5 This is a schematic diagram of the installation position of the drive component of the present invention; Figure 6 This is a schematic diagram of the installation position of the air extraction component of the present invention; Figure 7 This is a schematic diagram of the installation position of the right exhaust groove of the present invention; Figure 8 This is a schematic diagram of the installation position of the left exhaust groove of the present invention; Figure 9 This is a schematic diagram of the installation position of the adjusting component of the present invention; Figure 10 for Figure 9A partial enlarged view of the structure at point A in the middle; Figure 11 This is a schematic diagram of the exhaust component mounting position structure according to the present invention; Figure 12 for Figure 11 A partial enlarged view of the structure at point B in the middle.

[0019] In the diagram: 1. Bracket; 11. Support frame; 12. Adjusting frame; 2. Foaming unit; 21. Mold cavity; 211. Left mold cavity; 212. Right mold cavity; 22. Molding groove; 3. Adjusting unit; 31. Mounting component; 311. Mounting base; 312. Fixing box; 32. Driving component; 321. Drive motor; 322. Pull rod; 323. Return spring; 324. Valve stem; 3241. Left exhaust groove; 3242. Right exhaust groove; 33. Air extraction component; 331. Air extraction pipe; 332. Left exhaust pipe; 333. Right exhaust pipe; 34. Adjusting component; 341. Fixing cylinder; 342. Buffer spring; 343. Conical block; 35. Exhaust component; 351. Exhaust channel; 352. Baffle; 353. Elastic rod. Detailed Implementation

[0020] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figures 1-8 As shown in Embodiment 1 of the present invention, a technical solution for a foaming mold for automotive wiring harness production is provided.

[0022] The specific content of Embodiment 1 is as follows: A foaming mold for automotive wiring harness production includes a bracket 1, a controller is provided on the bracket 1, a foaming unit 2 is provided on the bracket 1, and an adjustment unit 3 is provided on the foaming unit 2. The bracket 1 includes a support frame 11 and an adjustment frame 12, which are slidably connected. The foaming unit 2 includes a mold cavity 21 and a molding groove 22; The adjustment unit 3 includes a mounting component 31, a driving component 32, and an air extraction component 33. The mounting component 31 is provided with the driving component 32 and the air extraction component 33. The driving component 32 is provided with two grooves of different lengths. The adjusting frame 12 is fixedly connected to the mold cavity 21, the mold cavity 21 is fixedly connected to the mounting part 31, and the mold cavity 21 is connected to the air extraction part 33 through a conduit.

[0023] After the wire harness is placed in the molding groove 22, the mold cavity 21 is closed. The operator can adjust the height of the adjustment frame 12 to reach the bottom of the injection device for injection. During the injection process, the drive component 32 on the mounting component 31 can be activated in conjunction with the air extraction component 33 to automatically improve the flash and air trapping problems in the mold cavity, thereby ensuring the molding quality.

[0024] The drive unit 32 includes a drive motor 321, a pull rod 322, a return spring 323 and a valve stem 324. The extension end of the drive motor 321 is fixedly connected to the pull rod 322, and the other end of the pull rod 322 is fixedly connected to the valve stem 324.

[0025] The valve stem 324 is provided with a left exhaust groove 3241 and a right exhaust groove 3242. The length of the left exhaust groove 3241 is the same as that of the valve stem 324. The right exhaust groove 3242 is located at the end of the valve stem 324 away from the pull rod 322. The length of the left exhaust groove 3241 is greater than the length of the right exhaust groove 3242.

[0026] Mounting component 31 includes mounting base 311 and fixed box 312. The fixed end of drive motor 321 is fixedly mounted on fixed box 312. One end of pull rod 322 is slidably connected to fixed box 312. Mounting base 311 is fixedly connected to fixed box 312. Valve stem 324 is connected to fixed box 312 through return spring 323.

[0027] The air extraction component 33 includes an air extraction pipe 331, a left exhaust pipe 332 and a right exhaust pipe 333. The air extraction pipe 331 is located at the end of the fixed box 312 near the drive motor 321 and is connected to an external air pump. The left exhaust pipe 332 and the right exhaust pipe 333 are located at the end of the fixed box 312 near the mounting base 311.

[0028] The mold cavity 21 is composed of a left mold cavity 211 and a right mold cavity 212. Both the left mold cavity 211 and the right mold cavity 212 are provided with molding grooves 22. The left exhaust pipe 332 is connected to the left mold cavity 211 through a conduit, and the right exhaust pipe 333 is connected to the right mold cavity 212 through a conduit. The right mold cavity 212 is fixedly installed on the adjusting frame 12. The left mold cavity 211 is rotatably connected to the right mold cavity 212 through a connector. The right mold cavity 212 is fixedly connected to the mounting base 311.

[0029] When the automotive wiring harness is fixed and the material is injected, the controller controls the drive motor 321 on the fixing box 312 to start the drive motor 321. The output end of the drive motor 321 drives the valve stem 324 to move axially along the inside of the fixing box 312 through the pull rod 322, while compressing the return spring 323. The movement of valve stem 324 is divided into three stages, corresponding to the different venting states of the left mold cavity 211 and the right mold cavity 212. In the initial stage of injection, the left venting groove 3241 on valve stem 324 remains connected to the left venting pipe 332 throughout the entire process. An external air pump forms a stable negative pressure through the extraction pipe 331. The air in the left mold cavity 211 and the gas generated in the initial foaming stage are continuously discharged outwards through the left venting pipe 332 and the extraction pipe 331. At this time, the vent of the right venting pipe 333 is completely blocked by the solid section of valve stem 324, and the right mold cavity 212 does not vent, maintaining a constant back pressure inside. In the middle stage of injection, valve stem 324 continues to move towards the end of its stroke. The venting passage of the left mold cavity 211 remains unobstructed, while the right mold cavity 212 remains in a closed pressure-holding state. With the help of the right mold cavity 212... The back pressure resistance inside cavity 12 can effectively slow down the filling speed of the molten material into the right cavity 212, forming a filling resistance difference between the left and right cavities. This guides the molten material to fill the left cavity 211 first, ensuring that the filling progress of the left and right cavities remains synchronized and avoiding uneven molding caused by disordered movement of the molten material. In the later stage of injection, when the right cavity 212 is almost full, the valve rod 324 moves to the end of its stroke. The right venting groove 3242 at the end of the valve rod 324 is aligned and connected with the right venting pipe 333, opening the main venting passage of the right cavity 212. At this time, the left cavity 211 and the right cavity 212 simultaneously enter a high-flow venting state, which can completely extract the residual air and the gas generated by the foaming reaction inside the two cavities, avoiding the air trapping defect from the root and ensuring that the foamed layer is dense and uniform.

[0030] like Figure 9 , Figure 10 As shown in Embodiment 2 of the present invention, the air extraction component 33 in Embodiment 1 is optimized. In view of the problem that excessive air extraction and molten material overflowing into the channel and forming flash are easily caused by the full-circuit opening of the left mold cavity 211, the adjustment component 34 is set inside the left exhaust pipe 332 and the right exhaust pipe 333 to realize the adaptive adjustment of exhaust flow rate with cavity pressure.

[0031] The specific content of Embodiment 2 is as follows: the air extraction component 33 also includes an adjusting component 34, which includes a fixed cylinder 341, a buffer spring 342 and a conical block 343. The fixed cylinder 341 is fixedly installed in the left exhaust pipe 332 and the right exhaust pipe 333. The fixed cylinder 341 is connected to the conical block 343 through the buffer spring 342. The end of the conical block 343 with a smaller diameter is placed away from the valve stem 324.

[0032] In the initial stage of injection, the pressure inside the mold cavity is low. The buffer spring 342 pushes the conical block 343 to fit against the port of the fixed cylinder 341 by its own restoring elastic force, leaving only a narrow ventilation gap between them. At this time, the exhaust flow rate is at a low level, and the initial air in the cavity is discharged in a small flow mode to avoid the overflow of molten material caused by excessive exhaust under low pressure. As the injection process continues, the proportion of molten material in the mold cavity gradually increases, and the internal air pressure gradually increases. When the cavity pressure exceeds the elastic force threshold of the buffer spring 342, it pushes the conical block 343 to move away from the valve stem 324. The ventilation gap between the conical block 343 and the fixed cylinder 341 is widened accordingly, and the exhaust flow rate increases progressively with the increase of cavity pressure. This not only ensures the exhaust efficiency in the high-pressure stage, but also eliminates the problem of molten material overflow caused by continuous large exhaust in the low-pressure stage, effectively suppressing the generation of flash.

[0033] like Figure 11 , Figure 12 As shown in Embodiment 3 of the present invention, the adjusting component 34 in Embodiment 2 is optimized. Under normal working conditions, the right mold cavity 212 opens the vent in the middle and late stages of injection according to the preset timing. The appropriate amount of back pressure left in the cavity can balance the filling speed of the left and right cavities. If abnormal working conditions such as fluctuations in the fluidity of the raw material are encountered, the molten material in the right mold cavity 212 will be pushed too fast. Before the valve rod 324 moves to the position where the right vent groove 3242 and the right vent pipe 333 are connected, the pressure in the right mold cavity 212 will rise abnormally. At this time, the venting component 35 can automatically trigger emergency pressure relief.

[0034] The specific content of Embodiment 3 is as follows: The mounting component 31 also includes an exhaust component 35, which includes an exhaust channel 351, a baffle 352 and an elastic rod 353. The exhaust channel 351 is set in the fixed box 312. One end of the exhaust channel 351 is connected to the right exhaust pipe 333, and the other end of the exhaust channel 351 is connected to the suction pipe 331. A fixing groove is provided in the fixed box 312. The baffle 352 is slidably installed in the exhaust channel 351 and is installed in the fixing groove through the elastic rod 353.

[0035] When the air pressure in the right mold cavity 212 exceeds the safety threshold, the high-pressure gas enters the exhaust channel 351 through the right exhaust pipe 333, pushes the baffle 352 to slide along the fixed groove and compresses the elastic rod 353, thereby opening the bypass exhaust passage from the right exhaust pipe 333 through the exhaust channel 351 to the extraction pipe 331, realizing the early depressurization and exhaust of the right mold cavity 212, preventing the gas in the cavity from stagnating and forming excessive gas trapping defects. After the pressure in the right mold cavity 212 returns to the normal range, the elastic rod 353 pushes the baffle 352 to automatically reset, closes the bypass passage, and the mold returns to the normal timing exhaust sequence.

[0036] like Figure 6As shown, a partition is provided at the end of the fixed box 312 away from the pull rod 322, and a sliding groove is provided on the valve stem 324. The valve stem 324 is slidably connected to the partition through the sliding groove.

[0037] To prevent the left exhaust pipe 332 from becoming connected to the right exhaust pipe 333 during the movement of the valve stem 324, thus ensuring the priority of exhaust from the left mold cavity 211.

[0038] Working principle of the invention: After the automotive wiring harness is fixed, the injection process begins. The controller drives the drive motor 321 on the fixing box 312 to rotate, which in turn drives the valve stem 324 to move axially within the fixing box 312 via the pull rod 322, compressing the return spring 323. In the initial stage of injection, the left exhaust groove 3241 of the valve stem 324 and the left exhaust pipe 332 are continuously connected. The air pump creates negative pressure through the air extraction pipe 331, continuously extracting air and foaming gas from the left mold cavity 211. At this time, the right exhaust pipe 333 is blocked by the valve stem 324, and the right mold cavity 212 is closed and pressure is maintained, keeping the back pressure constant. In the middle stage of injection, the valve stem 324... 4. Continue moving forward, with the left mold cavity 211 maintaining unobstructed venting and the right mold cavity 212 maintaining pressure. The back pressure of the right cavity creates a filling resistance difference, slowing down the filling speed of the molten material in the right mold cavity 212 and guiding the molten material to fill the left mold cavity 211 first. This ensures that the filling progress of the two cavities is synchronized, preventing the molten material from moving around and causing uneven molding. In the later stage of injection, when the right mold cavity 212 is about to be filled, the valve rod 324 reaches the end of its stroke, and the right venting groove 3242 and the right venting pipe 333 are connected. The two cavities open simultaneously with a large flow of venting to completely remove the residual gas in the cavity, eliminate the problem of trapped gas, and ensure that the foam layer is formed densely and evenly.

[0039] Under low-pressure conditions, the buffer spring 342 pushes the conical block 343 to fit against the fixed cylinder 341, forming a narrow gap for low-flow exhaust, which avoids excessively fast low-pressure exhaust and molten material overflow. As the cavity pressure increases, the air pressure pushes the conical block 343 to move, expanding the ventilation gap and increasing the exhaust flow, ensuring high-pressure exhaust efficiency and low-pressure anti-burst requirements.

[0040] When the air pressure in the right mold cavity 212 exceeds the threshold, the high-pressure gas pushes the baffle 352 and compresses the elastic rod 353 through the exhaust channel 351, opening the bypass passage to release pressure in advance. After the pressure is restored, the structure automatically resets to ensure stable operation of the process.

[0041] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A foaming mold for automotive wiring harness production, characterized in that: The foaming mold includes a support (1), a controller is provided on the support (1), a foaming unit (2) is provided on the support (1), and an adjustment unit (3) is provided on the foaming unit (2). The bracket (1) includes a support frame (11) and an adjustment frame (12), which are slidably connected. The foaming unit (2) includes a mold cavity (21) and a molding groove (22); The adjustment unit (3) includes a mounting component (31), a driving component (32) and an air extraction component (33). The mounting component (31) is provided with the driving component (32) and the air extraction component (33). The driving component (32) is provided with two grooves of different lengths. The adjusting frame (12) is fixedly connected to the mold cavity (21), the mold cavity (21) is fixedly connected to the mounting part (31), and the mold cavity (21) is connected to the air extraction part (33) through a conduit; The driving component (32) includes a drive motor (321), a pull rod (322), a return spring (323), and a valve stem (324). The extension end of the drive motor (321) is fixedly connected to the pull rod (322), and the other end of the pull rod (322) is fixedly connected to the valve stem (324). The valve stem (324) is provided with a left exhaust groove (3241) and a right exhaust groove (3242). The length of the left exhaust groove (3241) is the same as that of the valve stem (324). The right exhaust groove (3242) is located at the end of the valve stem (324) away from the pull rod (322). The length of the left exhaust groove (3241) is greater than the length of the right exhaust groove (3242). The mounting component (31) includes a mounting base (311) and a fixed box (312). The fixed end of the drive motor (321) is fixedly mounted on the fixed box (312). One end of the pull rod (322) is slidably connected to the fixed box (312). The mounting base (311) is fixedly connected to the fixed box (312). The valve stem (324) is connected to the fixed box (312) through a return spring (323). The air extraction component (33) includes an air extraction pipe (331), a left exhaust pipe (332) and a right exhaust pipe (333). The air extraction pipe (331) is located at one end of the fixed box (312) near the drive motor (321). The air extraction pipe (331) is connected to an external air pump. The left exhaust pipe (332) and the right exhaust pipe (333) are located at one end of the fixed box (312) near the mounting base (311). The mold cavity (21) is composed of a left mold cavity (211) and a right mold cavity (212). Both the left mold cavity (211) and the right mold cavity (212) are provided with molding grooves (22). The left exhaust pipe (332) is connected to the left mold cavity (211) through a conduit. The right exhaust pipe (333) is connected to the right mold cavity (212) through a conduit. The right mold cavity (212) is fixedly installed on the adjusting frame (12). The left mold cavity (211) is rotatably connected to the right mold cavity (212) through a connector. The right mold cavity (212) is fixedly connected to the mounting base (311).

2. The foaming mold for automotive wiring harness production according to claim 1, characterized in that: The extraction component (33) also includes an adjusting component (34), which includes a fixed cylinder (341), a buffer spring (342), and a conical block (343). The fixed cylinder (341) is fixedly installed in the left exhaust pipe (332) and the right exhaust pipe (333). The fixed cylinder (341) is connected to the conical block (343) through the buffer spring (342). The conical block (343) is placed at the end with the smaller diameter away from the valve stem (324).

3. The foaming mold for automotive wiring harness production according to claim 2, characterized in that: The mounting component (31) also includes an exhaust component (35), which includes an exhaust channel (351), a baffle (352), and an elastic rod (353). The exhaust channel (351) is located inside the fixed box (312). One end of the exhaust channel (351) is connected to the right exhaust pipe (333), and the other end of the exhaust channel (351) is connected to the suction pipe (331). The fixed box (312) is provided with a fixing groove. The baffle (352) is slidably installed in the exhaust channel (351), and the baffle (352) is installed in the fixing groove through the elastic rod (353).

4. The foaming mold for automotive wiring harness production according to claim 3, characterized in that: The fixed box (312) has a partition plate at the end away from the pull rod (322), and the valve stem (324) has a sliding groove. The valve stem (324) is slidably connected to the partition plate through the sliding groove.

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