A precision injection mold for automobile parts

Abstract

This invention provides a precision injection mold for automotive parts, belonging to the field of automotive parts injection molding technology. It includes a moving mold and a fixed mold. The moving mold has a multi-station gating assembly inside, a dynamic adjustment assembly on its top, and an injection cleaning assembly on the dynamic adjustment assembly. The fixed mold has a venting ejector assembly on its top, and cooling components around its perimeter and bottom. The multi-station gating assembly is arranged in a matrix and is used to adjust and distribute the injection speed of each nozzle, reducing melt flow differences. This invention, through multi-station gating, dynamic adjustment, and other components, achieves differentiated filling, thick-walled shrinkage compensation, residue removal, smooth demolding, and efficient cooling, comprehensively reducing defects such as melt flow differences, shrinkage marks, and sticking, shortening the cooling cycle, and improving the quality and production efficiency of precision injection molded parts.

Description

Technical Field

[0001] This invention relates to the field of automotive parts injection molding technology, and in particular to a precision injection mold for automotive parts. Background Technology

[0002] In today's rapidly developing automotive industry, the requirements for precision, stability, and consistency in automotive parts are becoming increasingly stringent. Precision injection molding, as one of the core production processes for automotive parts, directly determines product quality through mold performance. However, existing precision injection molds for automotive parts still face numerous technical challenges in practical applications, making it difficult to meet the production demands of high-end automotive parts.

[0003] Automotive parts often feature complex curved surfaces and uneven thicknesses. Traditional molds typically employ single gates or fixed runner designs. During the melt flow process, variations in path length and cross-sectional area can lead to inconsistent flow rates, resulting in uneven filling of different areas of the injection molded part. This can cause defects such as material shortages and obvious weld lines. Furthermore, thick-walled areas of the mold are prone to insufficient pressure during the injection and holding phase, leading to shrinkage marks and depressions. Current mold pressure regulation is mostly based on overall control, making it difficult to precisely compensate for shrinkage in locally thick-walled areas. After injection molding, residual injection material can easily accumulate in the injection channel, leading to long-term buildup. Excessive fatigue can lead to blockages in the mold channels. Traditional cleaning methods often rely on manual mold disassembly, which is cumbersome and inefficient. Incomplete gas removal from the mold cavity can easily lead to defects such as bubbles and pinholes in the injection molded parts. During demolding, the product often sticks to the mold cavity wall. Traditional top mold structures are prone to product deformation due to uneven stress, further reducing the yield rate. Inadequate mold cooling system design, especially in the thick-walled areas, not only prolongs the cooling cycle and reduces production efficiency, but also easily causes mold warping due to uneven cooling, affecting the dimensional accuracy and stability of subsequent injection molding.

[0004] Therefore, this application provides a precision injection mold for automotive parts to meet the requirements. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a precision injection mold for automotive parts, so as to solve the problems of melt flow difference, insufficient local shrinkage, difficulty in cleaning residues, poor venting and demolding effect and low cooling efficiency.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0007] A precision injection mold for automotive parts includes a movable mold and a fixed mold. The movable mold has a multi-station gate assembly inside, a dynamic adjustment assembly on its top, and an injection cleaning assembly on the dynamic adjustment assembly. The fixed mold has a venting ejector assembly on its top, and cooling components are located around its perimeter and bottom. The multi-station gate assembly is arranged in a matrix and is used to adjust and distribute the injection speed of each nozzle, reducing melt flow differences. The dynamic adjustment assembly is located on the side of the multi-station gate assembly and is used to increase the shrinkage pressure in the rear wall area of ​​the mold. The injection cleaning assembly is located at the bottom of the dynamic adjustment assembly and is used to remove residual injection material from the injection channels. The venting ejector assembly consists of an ejector structure and a venting structure, and is used for smooth ejection, avoiding deformation and sticking. The cooling components are connected to an external cooling water source and are used to reduce mold warpage and cooling cycles.

[0008] Optionally, the multi-station gate assembly includes a manifold, a main injection port is provided on the top of the manifold, a plurality of manifold pipes are installed on the bottom of the manifold, a flow distribution valve is installed on the manifold pipes, and an injection channel is provided at the bottom of the manifold pipes.

[0009] Optionally, the dynamic adjustment component includes a cylinder, a telescopic rod is fixedly connected to the bottom of the cylinder, a fixed sleeve is fixedly installed inside the moving mold, and the telescopic rod slides inside the fixed sleeve.

[0010] Optionally, a slide rod is slidably connected to the diversion pipe, and an adjusting plate is fixedly connected to one end of the slide rod. The adjusting plate is located inside the diversion pipe, and two limiting plates are fixedly connected to the slide rod. The two limiting plates are located inside and outside the diversion pipe, respectively. The inner limiting plate is located on the adjusting plate, and a spring is installed on the limiting plate outside the diversion pipe.

[0011] Optionally, the other end of the slide rod is hinged to a hinge rod, which has a through groove one and a through groove two. The through groove one is rotatably connected to the fixed sleeve via a rotating shaft. A limit block is provided on the through groove two. A connector is slidably connected in the through groove two. An elastic block is installed on the connector. The connector is fixedly connected to the telescopic rod one. A rotating block is fixedly connected to the bottom of the telescopic rod one. An installation plate is fixedly connected to the side of the rotating block. An injection molding cleaning assembly is provided on the installation plate. An electromagnetic door is installed at the bottom of the movable mold.

[0012] Optionally, the injection molding cleaning assembly includes a motor, the drive end of which is driven by a threaded rod, the threaded rod is threadedly connected to a threaded sleeve, a plurality of elastic telescopic rods are mounted on the threaded sleeve, and brushes are mounted on the elastic telescopic rods.

[0013] Optionally, the exhaust top mold assembly includes an air pump and a hydraulic cylinder. Each dead corner of the fixed mold cavity is provided with an air vent. The air vent is connected to the inside of the fixed mold via an air vent. An air pump is installed on the top of the movable mold. An air vent is provided on the movable mold. The air pump is connected to the air vent. When the mold is closed, the air vent and the air vent are connected. The gas inside the fixed mold is extracted by the air pump under negative pressure and stored in an external air storage chamber.

[0014] Optionally, the hydraulic cylinder is installed at the bottom of the fixed mold, and a push rod is slidably connected inside the hydraulic cylinder.

[0015] Optionally, the surface of the fixed mold cavity is processed with micron-level pit texture, a plurality of gas-assisted nozzles are installed on the surface of the fixed mold cavity, a one-way valve is installed inside the gas-assisted nozzle, the gas-assisted nozzle is connected to a gas channel, an annular gas pipe is fixedly connected to the bottom of the fixed mold, the gas channel is connected to the annular gas pipe, and the annular gas pipe is connected to an external gas storage chamber.

[0016] Optionally, the cooling assembly includes an annular cooling pipe, the bottom of which is connected to a second pipe, which is located inside the fixed mold and at the bottom of the thick-walled region of the mold.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] In the above scheme, by setting up a multi-station gate assembly, the melt enters the manifold from the main injection port and is distributed to each injection channel through a matrix arrangement of manifolds. The flow distribution valve can independently adjust the melt flow rate of each manifold, reduce the flow difference between different nozzles, ensure that the melt fills the mold cavity evenly, and improve the consistency of the injection molded parts.

[0019] With a dynamic adjustment component, the cylinder drives the telescopic rod to slide along the fixed sleeve, and through the connecting piece, it drives the hinge rod to rotate around the pivot. The hinge rod pushes the slide rod to slide on the distributor tube, causing the adjustment plate located inside the distributor tube to move, thereby changing the melt flow cross section, increasing the feeding pressure in the rear wall area of ​​the mold, and preventing defects in this area due to insufficient pressure. The spring and the limit plate work together to ensure the reset and stroke limitation of the adjustment plate, while the elastic block buffers the impact force during the adjustment process.

[0020] With the injection cleaning component, after injection molding is completed, the rotating block drives the mounting plate to rotate, so that the brush is aligned with the injection channel. The motor drives the threaded rod to rotate, and the threaded sleeve moves along the axial direction of the threaded rod. At the same time, the elastic telescopic rod adapts to the shape of the channel and pushes the brush into the injection channel to remove residual injection material.

[0021] By incorporating cooling components, external cooling water is introduced into the annular cooling pipe to cool the entire mold. For thick-walled areas of the mold, the water is then transported to the bottom of the thick-walled area through a second pipe, forming an all-round cooling circuit. This quickly removes heat from the thick-walled areas, reduces mold warping and deformation, shortens the cooling cycle of injection molded parts, and improves production efficiency.

[0022] By setting up an exhaust ejector assembly, with vent two and vent three connected, the air pump draws gas from the fixed mold cavity through negative pressure and introduces it into the external air storage cavity through vent one, vent two and vent three. This avoids defects such as bubbles and material shortages in the injection molded parts caused by gas in the cavity. At the end of the cooling stage, the gas in the external air storage cavity is sent to the air-assisted nozzle through the annular air pipe and gas channel to blow air between the cavity and the injection molded part, reducing the sticking phenomenon, ensuring that the injection molded part is demolded smoothly and without deformation, reducing demolding resistance, and finally the injection molded part is smoothly ejected by the push rod driven by the hydraulic cylinder. Attached Figure Description

[0023] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the invention and, together with the specification, further serve to explain the principles of the invention and enable those skilled in the art to practice and use the invention.

[0024] Figure 1 A schematic diagram of the three-dimensional structure of a precision injection mold used for automotive parts;

[0025] Figure 2 A schematic diagram of the bottom three-dimensional structure of a precision injection mold used for automotive parts;

[0026] Figure 3 This is a three-dimensional structural schematic diagram of a multi-station gate assembly.

[0027] Figure 4 This is a sectional view of the moving mold;

[0028] Figure 5 This is a schematic diagram of the three-dimensional structure of the dynamic adjustment component.

[0029] Figure 6 for Figure 5 Enlarged schematic diagram of the structure at point A in the diagram;

[0030] Figure 7 Side view of the moving mold;

[0031] Figure 8 The main view of the injection-molded cleanup component during operation;

[0032] Figure 9 This is a schematic diagram of the three-dimensional structure of the injection molding cleaning component;

[0033] Figure 10 A schematic diagram of the three-dimensional structure of the fixed mold;

[0034] Figure 11 For fixed mold sectional view;

[0035] Figure 12 for Figure 11 Enlarged schematic diagram of the structure at point C;

[0036] Figure 13 for Figure 10 Enlarged schematic diagram of the structure at point B in the diagram.

[0037] Figure label:

[0038] 1. Moving mold; 2. Fixed mold; 3. Multi-station gate assembly; 301. Manifold; 302. Main injection port; 303. Manifold pipe; 304. Flow distribution valve; 305. Injection channel; 4. Dynamic adjustment assembly; 401. Cylinder; 402. Telescopic rod one; 403. Fixed sleeve; 404. Slide rod; 405. Adjusting plate; 406. Limiting plate; 407. Spring; 408. Hinge rod; 409. Through slot one; 410. Through slot two; 411. Limiting block; 412. Connecting piece; 413. Elastic block; 414. Rotating block ; 415. Mounting plate; 416. Electromagnetic door; 5. Injection molding cleaning assembly; 501. Motor; 502. Threaded rod; 503. Threaded sleeve; 504. Elastic telescopic rod; 505. Brush; 6. Exhaust top mold assembly; 601. Vent one; 602. Vent two; 603. Air pump; 604. Vent three; 605. Hydraulic cylinder; 606. Push rod; 607. Annular air pipe; 608. Gas channel; 609. Air-assisted nozzle; 610. Micron-level pit texture; 7. Cooling assembly; 701. Annular cooling pipe; 702. Pipe two.

[0039] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0040] The following is a detailed description of a precision injection mold for automotive parts provided by the present invention, with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0041] like Figures 1 to 13As shown, an embodiment of the present invention provides a precision injection mold for automotive parts, including a movable mold 1 and a fixed mold 2. The movable mold 1 has a multi-station gate assembly 3 inside, a dynamic adjustment assembly 4 on its top, and an injection cleaning assembly 5 on the dynamic adjustment assembly 4. The fixed mold 2 has an venting ejector assembly 6 on its top, and cooling assemblies 7 around its sides and bottom. All electrical components of this device are controlled by a PLC. The multi-station gate assembly 3 is arranged in a matrix and is used to adjust and distribute the injection speed of each nozzle, reducing melt flow differences. The dynamic adjustment assembly 4 is located on the side of the multi-station gate assembly 3. Component 4 is used to increase the shrinkage compensation pressure in the rear wall area of ​​the mold. The injection cleaning component 5 is located at the bottom of the dynamic adjustment component 4. The injection cleaning component 5 is used to remove residual injection material in the injection channel 305. The venting ejector component 6 is composed of an ejector structure and a venting structure. The venting ejector component 6 is used for smooth ejection to avoid deformation and sticking. The cooling component 7 is connected to an external cooling water source. The cooling component 7 is used to reduce mold warpage and cooling cycle. Through multi-station gates, dynamic adjustment and other components, differentiated filling, thick-wall shrinkage compensation, residue removal, smooth demolding and efficient cooling are achieved, comprehensively reducing defects such as melt flow differences, shrinkage marks and sticking, shortening the cooling cycle and improving the quality and production efficiency of precision injection molded parts.

[0042] like Figures 2 to 3 As shown, the multi-station gate assembly 3 includes a manifold 301, a main injection port 302 at the top of the manifold 301, and several manifold pipes 303 installed at the bottom of the manifold 301. A flow distribution valve 304 is installed on each manifold pipe 303, and an injection channel 305 is opened at the bottom of each manifold pipe 303. The matrix arrangement combined with the flow distribution valve 304 adjusts the injection speed of each manifold pipe 303 to achieve differentiated filling, effectively reduce melt flow differences, ensure uniform filling in each area, and improve the consistency of injection molded parts.

[0043] like Figures 4 to 8As shown, the dynamic adjustment component 4 includes a cylinder 401, with a telescopic rod 402 fixedly connected to the bottom of the cylinder 401. A fixed sleeve 403 is fixedly installed inside the moving mold 1, and the telescopic rod 402 slides inside the fixed sleeve 403. A sliding rod 404 is slidably connected to the diversion pipe 303, with an adjusting plate 405 fixedly connected to one end of the sliding rod 404. The adjusting plate 405 is located inside the diversion pipe 303, and two limiting plates 406 are fixedly connected to the sliding rod 404. The two limiting plates 406 are located inside and outside the diversion pipe 303, respectively. The inner limiting plate 406 is located on the adjusting plate 405, and a spring 407 is installed on the outer limiting plate 406 of the diversion pipe 303. A hinge rod 408 is hingedly connected to the other end of the sliding rod 404, and a through groove 409 and a through groove 408 are provided on the hinge rod 408. Through slot 2 410 is rotatably connected to through slot 1 409 and fixed sleeve 403 via a rotating shaft. A limit block 411 is provided on through slot 2 410. A connector 412 is slidably connected inside through slot 2 410. An elastic block 413 is installed on the connector 412. The connector 412 is fixedly connected to telescopic rod 1 402. A rotating block 414 is fixedly connected to the bottom of telescopic rod 1 402. An installation plate 415 is fixedly connected to the side of the rotating block 414. An injection cleaning component 5 is provided on the installation plate 415. An electromagnetic door 416 is installed at the bottom of the moving mold 1. The adjusting plate 405 is moved by a structure such as cylinder 401 and hinge rod 408. This can independently increase the cross-sectional area of ​​the gate channel of the thick-walled area diversion pipe 303, specifically improve the shrinkage pressure, and efficiently solve the shrinkage problem in the thick-walled area of ​​the mold.

[0044] like Figure 9 As shown, the injection cleaning assembly 5 includes a motor 501. The drive end of the motor 501 is connected to a threaded rod 502. The threaded rod 502 is threadedly connected to a threaded sleeve 503. Several elastic telescopic rods 504 are installed on the threaded sleeve 503. Brushes 505 are installed on the elastic telescopic rods 504. The motor 501 drives the threaded rod 502 to move the threaded sleeve 503 up and down. The elastic telescopic rods 504 are adapted to the injection channel 305. The brushes 505 can clean the residual injection material in the channel, avoid channel blockage, and ensure smooth subsequent injection.

[0045] like Figures 10 to 13As shown, the exhaust top mold assembly 6 includes an air pump 603 and a hydraulic cylinder 605. Vent 1 601 is provided at each dead corner of the cavity of the fixed mold 2. Vent 1 601 is connected to vent 2 602 through the interior of the fixed mold 2. An air pump 603 is installed on the top of the movable mold 1. A vent 3 604 is provided on the movable mold 1. The air pump 603 is connected to vent 3 604. When the mold is closed, vent 2 602 and vent 3 604 are connected. The gas inside the fixed mold 2 is extracted by the air pump 603 under negative pressure and stored in an external air storage chamber. The hydraulic cylinder 605 is installed at the bottom of the fixed mold 2. A push rod 606 is slidably connected inside the hydraulic cylinder 605. The mold has two cavity surfaces with micron-level pit texture 610. Several gas-assisted nozzles 609 are installed on the surface of the cavity of the fixed mold 2. One-way valves are installed inside the gas-assisted nozzles 609. The gas-assisted nozzles 609 are connected to gas channels 608. An annular air pipe 607 is fixedly connected to the bottom of the fixed mold 2. The gas channels 608 are connected to the annular air pipe 607. The annular air pipe 607 is connected to an external air storage chamber. The air pump 603 uses negative pressure to extract gas from the dead corners of the cavity to reduce bubble defects. The gas in the air storage chamber forms an air film to reduce the friction between the product and the cavity. With the help of the hydraulic cylinder 605 and the push rod 606, the product is smoothly ejected, avoiding product deformation and sticking to the mold, and improving the demolding quality and efficiency.

[0046] like Figures 11 to 12 As shown, the cooling assembly 7 includes an annular cooling pipe 701, with a second pipe 702 connected to the bottom of the annular cooling pipe 701. The second pipe 702 is located inside the fixed mold 2 and at the bottom of the thick-walled area of ​​the mold. The annular cooling pipe 701 provides comprehensive cooling to the cavity, while the second pipe 702 specifically enhances the cooling of the thick-walled area, reducing the rate of thick-walled shrinkage defects, improving the uniformity of product wall thickness, and shortening the cooling cycle to improve production efficiency.

[0047] The working principle of the technical solution provided by this invention is as follows:

[0048] During injection molding, the movable mold 1 is first moved towards the fixed mold 2 until the two fit tightly together to complete mold closing. Then, injection is performed through the main injection port 302. The injection material enters the manifold 301 through the main injection port 302. The injection speed of each manifold 303 is adjusted by the flow distribution valve 304, so that the injection speed of the manifold 303 near the main injection port 302 is slower, and the injection speed of the manifold 303 far from the main injection port 302 is faster, so as to achieve differentiated filling and reduce melt flow differences. The injection material in the manifold 303 enters the cavity of the fixed mold 2 through the bottom injection channel 305 to complete the injection molding.

[0049] During the pressure holding stage, cylinders 401 near the thick-walled area of ​​the mold begin to work independently. Cylinder 401 controls the telescopic rod 402 to move downward. Connector 412 and elastic block 413 slide together inside through groove 410 towards limit block 411. Hinged rod 408 rotates around the pivot through through groove 409, thereby driving slide rod 404 to slide towards fixed sleeve 403. Adjusting plate 405 inside manifold 303 moves accordingly until limit plate 406 inside manifold 303 contacts the inner wall of manifold 303. At this time, elastic block 413 contacts limit block 411. Cylinder 401 stops moving. The cross-sectional area of ​​the gate channel inside manifold 303 increases, increasing the shrinkage pressure and effectively solving the shrinkage mark problem in the thick-walled area.

[0050] During cooling, cooling water is introduced into the annular cooling pipe 701 through an external cooling water source. The annular cooling pipe 701 provides comprehensive cooling to the cavity. The second pipe 702 is located at the bottom of the thick-walled area of ​​the mold, which can provide localized enhanced cooling to the thick-walled area of ​​the mold, further reducing the shrinkage defect rate in the thick-walled area, improving the uniformity of the product wall thickness, and shortening the cooling cycle.

[0051] Before injection molding, the gas in the cavity of the fixed mold 2 is extracted by the air pump 603. The air vent 601 is set in the dead corner area of ​​the mold. Under the negative pressure of the air pump 603, the gas enters the external air storage cavity through the air vent 601, the air vent 602 and the air vent 604. At the end of the cooling stage, the gas in the external air storage cavity is introduced into the annular air pipe 607, and then enters the air auxiliary nozzle 609 through the gas channel 608, and then enters the cavity of the fixed mold 2. Since the surface of the cavity of the fixed mold 2 is processed with micron-level pit texture 610, the gas will form a layer of air film in the micro-texture gap between the cavity and the product, which significantly reduces the friction between the product and the cavity wall. During demolding, the hydraulic cylinder 605 pushes the push rod 606 out from the bottom, and finally pushes the product out of the cavity, completing the demolding.

[0052] After the entire injection molding process is completed, cylinder 401 controls telescopic rod 402 to continue moving downward. Due to the limiting effect of the internal limiting plate 406 and the inner wall of the manifold 303, slide rod 404 remains unchanged, hinge rod 408 continues to rotate, limiting block 411 begins to squeeze elastic block 413, and finally elastic block 413 passes through limiting block 411 under the action of elastic deformation. Connector 412 and elastic block 413 continue to slide inside through groove 410. Electromagnetic door 416 at the bottom of telescopic rod 402 opens, and telescopic rod 402 drives injection cleaning assembly 5 out of the moving mold 1. Then, rotating block 414 drives the moving mold 1 to rotate 90 degrees, so that injection cleaning assembly 5 is opposite to injection channel 305. Start motor 501. Motor 501 drives threaded rod 502 to rotate. Due to the threaded connection between threaded rod 502 and threaded sleeve 503, threaded sleeve 503 moves upward. Injection channel 305 squeezes elastic telescopic rod 504 on the surface of threaded sleeve 503. Brush 505 cleans injection channel 305 to prevent residual injection material from clogging injection channel 305. After cleaning, reset injection cleaning component 5 and rotating block 414. Then cylinder 401 controls telescopic rod 402 to retract, retracting all structures back into moving mold 1. Elastic block 413 returns to its initial position after secondary compression by limit block 411. Slide rod 404 drives adjusting plate 405 back to its original position.

[0053] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0054] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A precision injection mold for automotive parts, characterized in that, It includes a movable mold (1) and a fixed mold (2). The movable mold (1) is provided with a multi-station gate assembly (3) inside. The movable mold (1) is provided with a dynamic adjustment assembly (4) on top. The dynamic adjustment assembly (4) is provided with an injection cleaning assembly (5). The fixed mold (2) is provided with an exhaust top mold assembly (6) at the bottom. The fixed mold (2) is provided with a cooling assembly (7) around its perimeter and bottom. The multi-station gate assembly (3) is arranged in a matrix and is used to adjust and distribute the injection speed of each nozzle to reduce the difference in melt flow. The dynamic adjustment component (4) is disposed on the side of the multi-station gate assembly (3), and the dynamic adjustment component (4) is used to increase the shrinkage pressure in the rear wall area of ​​the mold. The injection cleaning component (5) is located at the bottom of the dynamic adjustment component (4), and the injection cleaning component (5) is used to remove residual injection material from the injection channel (305); The exhaust top mold assembly (6) is composed of a top mold structure and an exhaust structure. The exhaust top mold assembly (6) is used to eject smoothly and avoid deformation and sticking to the mold. The cooling component (7) is connected to an external cooling water source, and the cooling component (7) is used to reduce mold warping and cooling cycle. The multi-station gate assembly (3) includes a manifold (301), a main injection port (302) is provided at the top of the manifold (301), a plurality of manifold pipes (303) are installed at the bottom of the manifold (301), a flow distribution valve (304) is installed on the manifold pipes (303), and an injection channel (305) is provided at the bottom of the manifold pipes (303). The dynamic adjustment component (4) includes a cylinder (401), a telescopic rod (402) is fixedly connected to the bottom of the cylinder (401), a fixed sleeve (403) is fixedly installed inside the moving mold (1), and the telescopic rod (402) slides inside the fixed sleeve (403). A slide rod (404) is slidably connected to the diversion pipe (303). An adjusting plate (405) is fixedly connected to one end of the slide rod (404). The adjusting plate (405) is located inside the diversion pipe (303). Two limiting plates (406) are fixedly connected to the slide rod (404). The two limiting plates (406) are located inside and outside the diversion pipe (303) respectively. The inner limiting plate (406) is located on the adjusting plate (405). A spring (407) is installed on the outer limiting plate (406) of the diversion pipe (303). The other end of the slide rod (404) is hinged to a hinge rod (408). The hinge rod (408) has a through groove one (409) and a through groove two (410). The through groove one (409) is rotatably connected to the fixed sleeve (403) through a rotating shaft. The through groove two (410) is provided with a limit block (411). A connector (412) is slidably connected in the through groove two (410). An elastic block (413) is installed on the connector (412). The connector (412) is fixedly connected to the telescopic rod one (402). A rotating block (414) is fixedly connected to the bottom of the telescopic rod one (402). An installation plate (415) is fixedly connected to the side of the rotating block (414). An injection cleaning component (5) is provided on the installation plate (415). An electromagnetic door (416) is installed at the bottom of the moving mold (1).

2. The precision injection mold for automotive parts according to claim 1, characterized in that, The injection molding cleaning assembly (5) includes a motor (501), the drive end of the motor (501) is driven to connect to a threaded rod (502), the threaded rod (502) is threaded to a threaded sleeve (503), a plurality of elastic telescopic rods (504) are installed on the threaded sleeve (503), and a brush (505) is installed on the elastic telescopic rods (504).

3. The precision injection mold for automotive parts according to claim 2, characterized in that, The exhaust top mold assembly (6) includes an air pump (603) and an oil cylinder (605). The fixed mold (2) has a ventilation port 1 (601) at each dead corner of the cavity. The ventilation port 1 (601) is connected to the ventilation port 2 (602) through the inside of the fixed mold (2). The movable mold (1) is equipped with an air pump (603) on top. The movable mold (1) has a ventilation port 3 (604) on it. The air pump (603) is connected to the ventilation port 3 (604). When the mold is closed, the ventilation port 2 (602) and the ventilation port 3 (604) are connected. The gas inside the fixed mold (2) is extracted by the air pump (603) under negative pressure and stored in the external gas storage chamber.

4. The precision injection mold for automotive parts according to claim 3, characterized in that, The oil cylinder (605) is installed at the bottom of the fixed mold (2), and a push rod (606) is slidably connected inside the oil cylinder (605).

5. The precision injection mold for automotive parts according to claim 4, characterized in that, The fixed mold (2) has a micron-level pit texture (610) on its cavity surface. Several gas-assisted nozzles (609) are installed on the cavity surface of the fixed mold (2). A one-way valve is installed inside the gas-assisted nozzle (609). The gas-assisted nozzle (609) is connected to a gas channel (608). An annular gas pipe (607) is fixedly connected to the bottom of the fixed mold (2). The gas channel (608) is connected to the annular gas pipe (607). The annular gas pipe (607) is connected to an external gas storage chamber.

6. The precision injection mold for automotive parts according to claim 5, characterized in that, The cooling assembly (7) includes an annular cooling pipe (701), the bottom of which is connected to a second pipe (702). The second pipe (702) is located inside the fixed mold (2) and at the bottom of the thick-walled area of ​​the mold.

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