A car bumper and its manufacturing process

Abstract

This invention discloses an automotive bumper and its manufacturing process. The invention includes a front bumper plate, side bumper plates, and auxiliary fixing plates. The front bumper plate has mounting cavities, and a buffer device is installed within these cavities. The buffer device includes a buffer push plate with a trapezoidal buffer rubber block mounted at its front. Multiple pushing components are installed within the groove. The buffer device also includes a T-shaped fixing plate disposed within the mounting cavities. A protective plate is also provided at the front end of the mounting cavities. This automotive bumper has two mounting cavities on the front bumper plate, each containing a buffer device. When the speed difference reaches a certain level, and only during deceleration, the buffer device, under inertia, propels out of the mounting cavities, immediately generating a collision to reduce the energy generated by the impact and protect the safety of passengers inside the vehicle. The pushing components within the buffer device have a pull rope connected to their tail end that automatically pulls the protective plate upwards, preventing the protective plate from being broken during sudden braking.

Description

Technical Field

[0001] This invention relates to the field of automotive parts manufacturing technology, specifically to an automotive bumper and its manufacturing process. Background Technology

[0002] As people's living standards gradually improve, cars have become the preferred mode of transportation for most families. Their advantages, such as speed and strong protection, have led more and more families to purchase cars. For manufacturers, market competition is also becoming increasingly fierce. In addition to adding humanized auxiliary functions to cars, car safety performance is still the primary performance requirement. Users tend to choose cars with higher safety performance, which typically includes body structure, protection system, airbags and seat belts, braking system, vehicle stability control, active safety assistance system, etc.

[0003] The car body structure best reflects a car's safety performance in the event of an accident. A well-designed body structure and material selection can significantly enhance a car's collision resistance. A robust and energy-absorbing body structure reduces intrusion into the passenger compartment during a collision, providing better protection. Within the body structure, bumpers are typically installed at the front and rear of the vehicle to absorb and disperse collision forces, mitigating injury to the vehicle and its passengers. A typical bumper consists of three parts: an outer panel, a buffer material, and a crossbeam. The outer panel and buffer material are made of plastic, while the crossbeam is made of a U-shaped channel stamped from a cold-rolled sheet approximately 1.5 mm thick. The outer panel and buffer material are attached to the crossbeam, which is bolted to the longitudinal beams of the vehicle frame and can be easily removed. The plastic used in these bumpers is primarily polyester or polypropylene, manufactured using injection molding. While these types of bumpers offer some protection against low-speed collisions, their effectiveness is limited in high-speed collisions, and they may even cause greater damage and deformation to the vehicle. Furthermore, existing bumpers are often designed to blend seamlessly with the vehicle body for aesthetic purposes, making the overall body lines smoother. In the event of an impending collision, the vehicle typically slows down, and due to inertia, the bumper immediately impacts and compresses inward, easily damaging surrounding parts of the vehicle and transferring excess collision energy to the body, thus threatening the safety of passengers. Summary of the Invention

[0004] The purpose of this invention is to provide an automobile bumper and its manufacturing process to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a car bumper, including a front bumper plate and side bumper plates installed on both sides of the front bumper plate, wherein an auxiliary fixing plate is connected to the rear end of the side bumper plate;

[0006] The front bumper has a heat dissipation area, and the heat dissipation area has mounting holes on the left and right sides. The heat dissipation area has mounting cavities on the upper and lower sides, and a buffer device is installed in the mounting cavity.

[0007] The buffer device includes a buffer push plate with a groove at the rear and a trapezoidal buffer rubber block installed at the front. Multiple pushing components are installed in the groove, which is divided into two groups and arranged vertically and vertically at equal intervals. The buffer device also includes a T-shaped fixing plate disposed in the mounting cavity. The horizontal plate of the T-shaped fixing plate is inserted between the upper and lower groups of pushing components, and the other end of the pushing component is installed through the vertical plate of the T-shaped fixing plate.

[0008] The front end of the mounting cavity is also provided with a protective plate, and the tail end of the protective plate is connected to the tail of the pushing component by a pull rope.

[0009] Preferably, the pushing component includes a T-shaped block with a through groove. A crossbar is provided in the through groove and connected to the inner walls on both sides of the through groove. Rollers are installed on the crossbar. An extension post is provided at the tail of the T-shaped block and a stop block is provided at the bottom of the extension post. A compression spring is also provided between the tail of the T-shaped block and the stop block. The compression spring is installed outside the extension post and its other end abuts against the side of the T-shaped fixing plate.

[0010] Preferably, both ends of the crossbar are inserted into the inner wall of the through groove, and springs are connected to both the upper and lower sides of the crossbar inside the side wall of the through groove. The other ends of the springs at both ends are installed on the upper and lower parts of the side wall of the through groove. The T-shaped fixing plate is provided with through holes for the extension column to pass through, and the upper and lower sides of the front end of the horizontal plate of the T-shaped fixing plate are both inclined, that is, the front end of the horizontal plate is higher than the middle of the horizontal plate.

[0011] Preferably, the pull rope is installed at one end of the stop block and penetrates the rear side of the front bumper plate. The T-shaped fixing plate is also provided with a groove for the pull rope to be stretched. The head height of the T-shaped block is smaller than the diameter of the roller.

[0012] Preferably, multiple locking blocks are installed on both sides of the protective plate, and the inner walls on both sides of the mounting cavity are provided with moving grooves. The moving grooves are L-shaped and are arranged along the edges of the inner walls on both sides of the mounting cavity. The inner walls on both sides of the moving grooves are also provided with positioning grooves. The multiple locking blocks cooperate with the moving grooves and the positioning grooves to move the protective plate within the mounting cavity.

[0013] Preferably, the plurality of the locking blocks are I-shaped locking blocks and are fitted into the positioning groove. The bending part of the L-shaped moving groove is provided with a support strip. The two ends of the support strip are connected to the bending parts of the moving groove on both sides, and the front end of the support strip is curved.

[0014] Preferably, multiple pull ropes are provided and symmetrically connected to one end of the protective plate, and a fixing groove for inserting the protective plate is provided at the bottom front end of the mounting cavity. The protective plate is made of elastic rubber material.

[0015] Preferably, the distance between the two sets of pushing components is such that both rollers on both sides are in contact with the T-shaped fixing plate, the overall length and width of the buffer device cannot exceed the internal length and width of the mounting cavity, the length of the protective plate should be at least greater than the front width of the mounting cavity, and the horizontal length of the T-shaped fixing plate does not exceed the depth of the mounting cavity.

[0016] Preferably, the front bumper, side bumper, and auxiliary fixing plate are all provided with embedded mounting plates on their inner sides.

[0017] A manufacturing process for a car bumper includes the following steps:

[0018] S1. Design and model making are carried out in the early stage of production. According to the car design requirements, a three-dimensional model of the car bumper is created using computer-aided design software, and molds for production are made.

[0019] S2. Prepare and pre-treat the materials, select suitable plastics and rubbers, and perform pre-treatment such as cleaning, heating, and mixing with additives to improve the processability of the materials.

[0020] S3. The pre-treated material is injection molded using an injection molding machine to complete the injection molding of the front bumper, side bumper, and auxiliary fixing plate. After cooling and solidification, the basic shape of the bumper is formed.

[0021] S4. Remove the injection-molded front bumper, side bumper, and auxiliary fixing plate, and use an electric saw and planer to cut and trim them to meet the standard size. Then weld and assemble them to form a complete bumper frame.

[0022] S5. The components of the buffer device are processed in batches, each part is produced separately, and then assembled by workers into a complete buffer device, which is then arranged neatly and transported to the molding bumper workbench.

[0023] S6. Perform surface treatment on the assembled buffer device, and at the same time grind and polish the surface of the bumper frame to ensure that there are no obvious defects. After completion, install the buffer device in the bumper mounting cavity.

[0024] S7. Design and produce protective plate molds according to the size of the bumper frame mounting cavity. Pour the vulcanized raw material into the pre-designed protective plate mold and remove it after it cools and solidifies.

[0025] S8. Perform surface treatment on the protective plate, install a pull rope at the position corresponding to the push component at its tail, and weld the other end of the pull rope to the stop block to complete the assembly and production of the entire bumper.

[0026] S9. Conduct quality inspection and test whether the buffer device can work properly. If it passes the quality inspection, package and mark it. If it fails the quality inspection, rework it.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] 1. The car bumper has two mounting cavities on the front bumper panel. A buffer device is installed in the mounting cavity, and a protective plate is installed at the front end of the mounting cavity. During normal driving, there is no need to worry about the buffer device rushing out of the mounting cavity and failing. When the car speed is slowly increasing or decreasing, the buffer device will not be triggered to rush out of the mounting cavity. Only when the speed difference reaches a certain level, and only during deceleration, the buffer device will rush out of the mounting cavity under the action of inertia, blocking the front of the car bumper panel and causing a collision at the first moment, reducing the energy generated by the impact and protecting the safety of passengers in the car.

[0029] 2. The push component inside the buffer device, when there is a large speed difference, its rollers move forward, passing over the inclined surface at the front end of the T-shaped fixed plate, and thus locking onto the front end of the T-shaped fixed plate, exposing the entire buffer device to the outside of the front bumper, so that it can buffer the collision energy. At the same time, when the push component moves forward, the pull rope connected to the tail end will automatically pull the protective plate upward, so that it is stored in the mounting cavity and supported by the support bar, to prevent the protective plate from being broken due to sudden braking, or the buffer device from being unable to break through the protective plate and thus failing to function.

[0030] 3. In actual use, the buffer device will only move forward and break through the mounting cavity to the outside when the vehicle brakes suddenly or slows down significantly. When no safety accident occurs, the rollers are mounted on the elastic crossbar and can move up and down to a certain extent. Therefore, even when no safety accident occurs, the buffer device can still be pushed back into the mounting cavity for reuse, reducing maintenance costs. Furthermore, the buffer device of this car bumper does not involve electrical connections, which can minimize the possibility of electrical fires. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of an automobile bumper and its manufacturing process according to the present invention.

[0032] Figure 2 This is a schematic diagram of the usage state of an automobile bumper and its manufacturing process according to the present invention.

[0033] Figure 3 This is a schematic diagram of the overall structure of an automobile bumper and its manufacturing process according to the present invention from another perspective.

[0034] Figure 4 This is a schematic diagram of the overall structure and internal structure of the mounting cavity of an automobile bumper and its manufacturing process according to the present invention.

[0035] Figure 5 This invention relates to an automobile bumper and its manufacturing process. Figure 4 Schematic diagram of part A in the middle;

[0036] Figure 6 This is a schematic diagram of the overall structure of a car bumper and its manufacturing process, including a buffer device and a protective plate.

[0037] Figure 7 This is a schematic diagram of another view of the buffer device and protective plate of an automobile bumper and its manufacturing process according to the present invention.

[0038] Figure 8 This is a schematic diagram of the overall structure of a buffer device for an automobile bumper and its manufacturing process according to the present invention.

[0039] Figure 9 This is a schematic diagram of the push-up component structure of an automobile bumper and its manufacturing process according to the present invention.

[0040] Figure 10 This is a schematic diagram of the inner structure of the T-shaped block through groove of an automobile bumper and its manufacturing process according to the present invention.

[0041] In the diagram: 1. Front bumper; 2. Side bumper; 3. Auxiliary fixing plate; 4. Heat dissipation area; 5. Mounting hole; 6. Mounting cavity; 7. Buffer push plate; 8. Groove; 9. Trapezoidal buffer rubber block; 10. T-shaped fixing plate; 11. Protective plate; 12. Pull rope; 13. T-block; 14. Through groove; 15. Crossbar; 16. Roller; 17. Extension column; 18. Stop block; 19. Compression spring; 20. Spring; 21. Through hole; 22. Slide groove; 23. Locking block; 24. Moving groove; 25. Positioning groove; 26. Support bar; 27. Fixing groove; 28. Embedded mounting plate. Detailed Implementation

[0042] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0043] Please see Figure 1-10 The diagram shows the overall structure of a car bumper.

[0044] A car bumper includes a front bumper plate 1 and side bumper plates 2 installed on both sides of the front bumper plate 1, with an auxiliary fixing plate 3 connected to the rear end of the side bumper plate 2.

[0045] Specifically, the front bumper 1 is provided with a heat dissipation area 4, the heat dissipation area 4 is provided with mounting holes 5 on the left and right sides, the heat dissipation area 4 is provided with mounting cavities 6 on the upper and lower sides, and a buffer device is installed in the mounting cavity 6.

[0046] Specifically, the buffer device includes a buffer push plate 7, a groove 8 is provided at the rear of the buffer push plate 7, a trapezoidal buffer rubber block 9 is installed at the front of the buffer push plate 7, and multiple pushing components are installed in the groove 8. The multiple pushing components are divided into two groups and are evenly spaced and arranged vertically in the groove 8. The buffer device also includes a T-shaped fixing plate 10 set in the mounting cavity 6. The horizontal plate of the T-shaped fixing plate 10 is inserted between the upper and lower groups of pushing components, and the other end of the pushing component is installed through the vertical plate of the T-shaped fixing plate 10.

[0047] Specifically, the front end of the mounting cavity 6 is also provided with a protective plate 11, and the tail end of the protective plate 11 is connected to the tail of the push component by a pull rope 12.

[0048] In this invention, a buffer device is installed in the mounting cavity 6 on the front bumper plate 1, and a T-shaped fixing plate 10 is fixed inside it. The buffer device is installed in the mounting cavity 6 in cooperation with the buffer device. During normal vehicle operation, the buffer device is stable in the mounting cavity 6. Once the vehicle speed drops rapidly and the speed difference is too large, the buffer device moves out of the mounting cavity 6 under the action of inertia. The propulsion component on the buffer device slides on the T-shaped fixing plate 10 until the roller 16 rolls to the inclined surface at the front end of the T-shaped fixing plate 10 and breaks through the inclined surface to the outside. At this time, the buffer device will move to the outside of the mounting cavity as a whole. The protective plate 11 also moves at the same time as the buffer device. When the buffer device moves forward, the pull rope 12 connected to the rear pulls the protective plate 11 to move backward, that is, the protective plate 11 opens, the buffer device rushes out, and the T-shaped fixing plate 10 will abut against the buffer device until the impact is completed, so that the buffer device contacts the impact surface as soon as possible, thereby reducing the impact energy borne by the vehicle body and reducing the possibility of injury to passengers inside the vehicle.

[0049] Specifically, the pushing component includes a T-shaped block 13, a through groove 14 on the T-shaped block 13, a crossbar 15 inside the through groove 14, the crossbar 15 being connected to the inner walls on both sides of the through groove 14, a roller 16 being mounted on the crossbar 15, an extension post 17 at the tail of the T-shaped block 13, a stop block 18 at the bottom of the extension post 17, and a compression spring 19 between the tail of the T-shaped block 13 and the stop block 18. The compression spring 19 is installed outside the extension post 17, and its other end abuts against the side of the T-shaped fixing plate 10.

[0050] Specifically, both ends of the crossbar 15 are inserted into the inner wall of the through groove 14, and springs 20 are connected to both the upper and lower sides of the crossbar 15 inside the side wall of the through groove 14. The other ends of the springs 20 at both ends are installed on the upper and lower parts of the side wall of the through groove 14. The T-shaped fixing plate 10 is provided with through holes 21 for the extension column 17 to pass through, and the upper and lower sides of the front end of the horizontal plate of the T-shaped fixing plate 10 are both inclined, that is, the front end of the horizontal plate is higher than the middle of the horizontal plate.

[0051] In this invention, the crossbar 15 in the pushing component can move up and down on the inner wall of the through groove 14 via the spring 20, ensuring that when the pushing component moves on the T-shaped fixing plate 10, it can smoothly pass through the inclined surface at the front end of the T-shaped fixing plate 10, and has a certain elastic space to return to its position.

[0052] Specifically, the pull rope 12 is installed at one end of the stop block 18, and the pull rope 12 penetrates the rear side of the front bumper plate 1. The T-shaped fixing plate 10 is also provided with a groove 22 for the pull rope 12 to be stretched. The head height of the T-shaped block 13 is smaller than the diameter of the roller 16.

[0053] Specifically, multiple locking blocks 23 are installed on both sides of the protective plate 11, and the inner walls on both sides of the mounting cavity 6 are provided with moving grooves 24. The moving grooves 24 are L-shaped and are set along the edges of the inner walls on both sides of the mounting cavity 6. The inner walls on both sides of the moving grooves 24 are also provided with positioning grooves 25. The multiple locking blocks 23 cooperate with the moving grooves 24 and the positioning grooves 25 to move the protective plate 11 in the mounting cavity 6.

[0054] Specifically, multiple card blocks 23 are I-shaped card blocks and are fitted into the positioning groove 25. The bending part of the L-shaped moving groove 24 is provided with a support bar 26. The two ends of the support bar 26 are connected to the bending parts of the moving grooves 24 on both sides, and the front end of the support bar 26 is curved.

[0055] Specifically, multiple pull ropes are provided and symmetrically connected to one end of the protective plate 11. The bottom front end of the mounting cavity 6 is provided with a fixing groove 27 for the protective plate 11 to be inserted. The protective plate 11 is made of elastic rubber material.

[0056] Specifically, the distance between the two sets of pushing components should be such that both rollers 16 are in contact with the T-shaped fixing plate 10, the overall length and width of the buffer device should not exceed the internal length and width of the mounting cavity 6, the length of the protective plate 11 should be at least greater than the front width of the mounting cavity 6, and the horizontal length of the T-shaped fixing plate 10 should not exceed the depth of the mounting cavity 6.

[0057] Specifically, the front bumper 1, side bumper 2 and auxiliary fixing plate 3 are all equipped with embedded mounting plates 28.

[0058] Based on a car bumper manufacturing process, the process includes the following steps:

[0059] S1. Design and model making are carried out in the early stage of production. According to the car design requirements, a three-dimensional model of the car bumper is created using computer-aided design software, and molds for production are made.

[0060] S2. Prepare and pre-treat the materials, select suitable plastics and rubbers, and perform pre-treatment such as cleaning, heating, and mixing with additives to improve the processability of the materials.

[0061] S3. The pre-treated material is injection molded using an injection molding machine to complete the injection molding of the front bumper 1, side bumper 2 and auxiliary fixing plate 3. After cooling and solidification, the basic shape of the bumper is formed.

[0062] S4. Take out the injection-molded front bumper plate 1, side bumper plate 2 and auxiliary fixing plate 3, cut and trim them with an electric saw and planer to make them reach the standard size, and then weld and assemble them to form a complete bumper frame.

[0063] S5. The components of the buffer device are processed in batches, each part is produced separately, and then assembled by workers into a complete buffer device, which is then arranged neatly and transported to the molding bumper workbench.

[0064] S6. Perform surface treatment on the assembled buffer device, and grind and polish the surface of the bumper frame to ensure there are no obvious defects. After completion, install the buffer device in the bumper mounting cavity 6.

[0065] S7. Design and produce the protective plate 11 mold according to the size of the bumper frame mounting cavity. Pour the vulcanized raw material into the pre-designed protective plate mold and remove it after it cools and solidifies.

[0066] S8. Perform surface treatment on the protective plate 11, install a pull rope at the position corresponding to the push component at its tail, and weld the other end of the pull rope 12 to the stop block 18 to complete the assembly and production of the overall bumper.

[0067] S9. Conduct quality inspection and test whether the buffer device can work properly. If it passes the quality inspection, package and mark it. If it fails the quality inspection, rework it.

[0068] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A car bumper, characterized in that: It includes a front bumper (1) and side bumpers (2) installed on both sides of the front bumper (1), with an auxiliary fixing plate (3) connected to the rear end of the side bumper (2). The front bumper (1) is provided with a heat dissipation area (4), and the heat dissipation area (4) is provided with mounting holes (5) on the left and right sides. The heat dissipation area (4) is provided with mounting cavities (6) on the upper and lower sides. A buffer device is installed in the mounting cavity (6). The buffer device includes a buffer push plate (7), a groove (8) is provided at the rear of the buffer push plate (7), a trapezoidal buffer rubber block (9) is installed at the front of the buffer push plate (7), a plurality of pushing components are installed in the groove (8), the plurality of pushing components are divided into two groups and are evenly spaced and arranged vertically in the groove (8), the buffer device also includes a T-shaped fixing plate (10) set in the mounting cavity (6), the horizontal plate of the T-shaped fixing plate (10) is inserted between the upper and lower groups of pushing components, and the other end of the pushing component is installed through the vertical plate of the T-shaped fixing plate (10); The front end of the mounting cavity (6) is also provided with a protective plate (11), and the tail end of the protective plate (11) is connected to the tail of the push assembly by a pull rope (12).

2. The car bumper according to claim 1, characterized in that: The pushing component includes a T-shaped block (13), a through groove (14) is provided on the T-shaped block (13), a crossbar (15) is provided in the through groove (14), the crossbar (15) is connected to the inner walls on both sides of the through groove (14), a roller (16) is installed on the crossbar (15), an extension post (17) is provided at the tail of the T-shaped block (13), a stop block (18) is provided at the bottom of the extension post (17), and a compression spring (19) is provided between the tail of the T-shaped block (13) and the stop block (18). The compression spring (19) is installed outside the extension post (17), and the other end abuts against the side of the T-shaped fixing plate (10).

3. A car bumper according to claim 2, characterized in that: Both ends of the crossbar (15) are inserted into the inner wall of the through groove (14), and springs (20) are connected to both the upper and lower sides of the crossbar (15) inside the side wall of the through groove (14). The other ends of the springs (20) at both ends are installed on the upper and lower parts of the side wall of the through groove (14). The T-shaped fixing plate (10) is provided with a through hole (21) for the extension column (17) to pass through. The upper and lower sides of the front end of the horizontal plate of the T-shaped fixing plate (10) are both inclined, that is, the front end of the horizontal plate is higher than the middle of the horizontal plate.

4. A car bumper according to claim 2, characterized in that: The pull rope (12) is installed at one end of the stop block (18) and the pull rope (12) penetrates the rear side of the front bumper plate (1). The T-shaped fixing plate (10) is also provided with a groove (22) for the pull rope (12) to be stretched. The head height of the T-shaped block (13) is smaller than the diameter of the roller (16).

5. A car bumper according to claim 1, characterized in that: Multiple locking blocks (23) are installed on both sides of the protective plate (11). Movable grooves (24) are provided on the inner walls of both sides of the mounting cavity (6). The movable grooves (24) are L-shaped and are arranged along the edges of the inner walls of both sides of the mounting cavity (6). Positioning grooves (25) are also provided on the inner walls of both sides of the movable grooves (24). The multiple locking blocks (23) cooperate with the movable grooves (24) and the positioning grooves (25) to make the protective plate (11) move in the mounting cavity (6).

6. A car bumper according to claim 5, characterized in that: The multiple card blocks (23) are I-shaped card blocks and are fitted into the positioning groove (25). The bending part of the moving groove (24) is provided with a support strip (26). The two ends of the support strip (26) are connected to the bending parts of the moving groove (24) on both sides, and the front end of the support strip (26) is curved.

7. A car bumper according to claim 1, characterized in that: Multiple pull ropes (12) are provided and symmetrically connected to one end of the protective plate (11). The bottom front end of the mounting cavity (6) is provided with a fixing groove (27) for the protective plate (11) to be inserted. The protective plate (11) is made of elastic rubber material.

8. A car bumper according to claim 2, characterized in that: The distance between the two sets of pushing components is such that both rollers (16) on both sides are in contact with the T-shaped fixing plate (10). The overall length and width of the buffer device cannot exceed the internal length and width of the mounting cavity (6). The length of the protective plate (11) should be at least greater than the front width of the mounting cavity (6). The horizontal length of the T-shaped fixing plate (10) does not exceed the depth of the mounting cavity (6).

9. A car bumper according to claim 1, characterized in that: The front bumper (1), side bumper (2) and auxiliary fixing plate (3) are all provided with embedded mounting plates (28).

10. A manufacturing process for an automobile bumper according to any one of claims 1-9, characterized in that: include: S1. Design and model making are carried out in the early stage of production. According to the car design requirements, a three-dimensional model of the car bumper is created using computer-aided design software, and molds for production are made. S2. Prepare and pre-treat the materials, select suitable plastics and rubbers, and perform pre-treatment such as cleaning, heating, and mixing with additives to improve the processability of the materials. S3. The pre-treated material is injection molded by an injection molding machine to complete the injection molding of the front bumper (1), side bumper (2) and auxiliary fixing plate (3). After cooling and solidification, the bumper prototype is formed. S4. Take out the injection-molded front bumper (1), side bumper (2) and auxiliary fixing plate (3), and use an electric saw and planer to cut and trim them to meet the standard size, and then weld and assemble them to form a complete bumper frame. S5. The components of the buffer device are processed in batches, each part is produced separately, and then assembled by workers into a complete buffer device, which is then arranged neatly and transported to the molding bumper workbench. S6. Perform surface treatment on the assembled buffer device, and at the same time grind and polish the surface of the bumper frame to ensure that there are no obvious defects. After completion, install the buffer device in the bumper mounting cavity (6). S7. Design and produce the mold for the protective plate (11) according to the size of the bumper frame mounting cavity (6). Pour the raw material into the pre-designed protective plate mold after vulcanization, and take it out for use after it cools and solidifies. S8. Perform surface treatment on the protective plate (11), install a pull rope at the position corresponding to the push component at its tail, and weld the other end of the pull rope (12) to the stop block (18) to complete the assembly and production of the overall bumper. S9. Conduct quality inspection and test whether the buffer device can work properly. If it passes the quality inspection, package and mark it. If it fails the quality inspection, rework it.

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