Automobile bumper and production process thereof

Abstract

The invention discloses an automobile bumper and a production process thereof, and relates to the technical field of automobile part machining, the automobile bumper comprises a base, one side of the top of the base is provided with a first fixing seat, and the other side of the top of the base is provided with a second fixing seat; mold bases are mounted on the outer walls of the sides, opposite to the first fixing base, of the sliding base; the bidirectional cooling mechanism is used for cooling the interiors of the two die holders; the adjusting mechanism is used for driving the cooling liquid to rotationally flow; according to the automobile bumper and the production process thereof, by arranging the multiple disconnected cooling channels, the problem that the temperature difference between the cooling liquid before and after passing through the cooling channels is large due to the fact that the bent and continuous cooling channels are long is solved, and the cooling liquid entering the cooling channels is driven to keep rotating; columnar cooling liquid circulates inside and outside and exchanges heat with the interior of the die holder, and therefore it is guaranteed that the cooling liquid can keep a good cooling effect from entering the cooling channel to being discharged out of the cooling channel.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts processing, and in particular to an automobile bumper and a production process thereof. Background Art

[0002] Bumpers are installed at the front and rear ends of the car. They not only have decorative functions, but more importantly, they are safety devices that absorb and mitigate external impact forces, protect the body and protect the body and occupants' safety. The outer panels are injection molded by injection molding equipment.

[0003] The cooling channel of the cooling structure in the existing injection molding equipment is usually continuously curved, and the cooling path is long. The temperature difference between the early and late stages of the coolant entering the cooling channel is large, resulting in large differences in cooling speeds in various areas of the mold base. In addition, the existing cooling channel does not have a cleaning function, resulting in a layer of scale easily forming inside the cooling channel when the coolant passes through the cooling channel for a long time. The scale layer will affect the heat conduction effect, thereby reducing the cooling effect on the inside of the mold base. Summary of the invention

[0004] The object of the present invention is to provide an automobile bumper and a production process thereof to solve the above-mentioned deficiencies in the prior art.

[0005] In order to achieve the above object, the present invention provides the following technical solution: a production process for an automobile bumper, comprising the following steps:

[0006] S1. First, a car bumper embryo is obtained by injection molding through an injection molding device;

[0007] S2. The automobile bumper blank is clamped and sent to the conveyor by a robot;

[0008] S3, conveying the automobile bumper embryo to a polishing station by a conveyor, and performing polishing treatment on the surface of the automobile bumper embryo;

[0009] S4, conveying the polished automobile bumper embryo to a painting station through a conveyor, and performing painting on the automobile bumper embryo;

[0010] S5, conveying the painted automobile bumper to a drying station through a conveyor to dry the automobile bumper;

[0011] S6. The automobile bumper after drying is conveyed to the inspection station by a conveyor to inspect the automobile bumper.

[0012] Furthermore, the injection molding equipment comprises:

[0013] A base, wherein a first fixing seat is installed on one side of the top of the base, and a second fixing seat is installed on the other side of the top of the base;

[0014] A slide seat is arranged between the first fixed seat and the second fixed seat, a mold seat is installed on the outer wall of the slide seat on the side opposite to the first fixed seat, an injection pipe is installed on the first fixed seat, and the injection pipe is connected to one of the mold seats;

[0015] A driving mechanism, which is mounted on the second fixed seat and is used to drive the slide to move;

[0016] Two bidirectional cooling mechanisms are provided and are respectively installed inside the two mold bases to cool the inside of the two mold bases respectively;

[0017] The regulating mechanism is connected to the bidirectional cooling mechanism and is used to drive the cooling liquid to flow in a rotational direction.

[0018] Further, the driving mechanism includes a plurality of first hydraulic cylinders mounted on the second fixed seat and a plurality of guide rods fixed between the first fixed seat and the second fixed seat;

[0019] The extended end of the first hydraulic cylinder is fixedly connected to the outer wall of the slide seat;

[0020] The slide seat is slidably sleeved on the outside of a plurality of guide rods.

[0021] Further, the bidirectional cooling mechanism comprises a plurality of cooling channels installed inside the mold base, a supply assembly installed at the top and bottom of the plurality of cooling channels, and two discharge assemblies installed at the top and bottom of the cooling channels respectively;

[0022] A piston is installed inside the cooling channel, and a transmission shaft is rotatably connected inside the piston. The top end of the transmission shaft extends to the outside of the mold base, and a lifting component for driving the transmission shaft to move is provided above the mold base.

[0023] Further, the supply assembly includes two liquid inlet pipes respectively installed at the top and bottom ends of the cooling channel and a first main flow pipe installed at the other ends of the two liquid inlet pipes;

[0024] The first main flow pipe in one of the two-way cooling mechanisms is installed on the outer wall of the first fixed seat, and the first main flow pipe in the other two-way cooling mechanism is installed on the outer wall of the sliding seat;

[0025] A first one-way valve is installed on each of the two liquid inlet pipes.

[0026] Further, the discharge assembly includes two drain pipes respectively installed at the top and bottom of the cooling channel and two second main flow pipes respectively installed at the other ends of the two drain pipes;

[0027] The two second main flow pipes are respectively installed on the top and bottom of the mold base;

[0028] A second one-way valve is installed on each of the two liquid discharge pipes.

[0029] Furthermore, the lifting assembly includes a lifting bar rotatably connected to the top ends of the plurality of transmission shafts and a plurality of connection blocks fixedly connected to the outer wall of one side of the lifting bar;

[0030] The bottom of the connecting block is connected with a second hydraulic cylinder, wherein the second hydraulic cylinder in one bidirectional cooling mechanism is installed inside the first fixed seat, and the second hydraulic cylinder in the other bidirectional cooling mechanism is installed inside the sliding seat.

[0031] Furthermore, the regulating mechanism comprises two impellers fixedly sleeved on the outside of the transmission shaft, a sleeve slidably sleeved on the outside of the transmission shaft, and a power assembly for driving one of the sleeves to rotate;

[0032] The two impellers are respectively located at the top and bottom of the piston;

[0033] Two adjacent sliding sleeves are connected to each other through a transmission member, wherein the transmission member comprises two synchronous wheels respectively fixedly sleeved on the outside of the two sliding sleeves and a synchronous belt connected to the outside of the two synchronous wheels;

[0034] A fixing strip is fixedly connected to the outer wall of the first fixing seat and the sliding seat on the opposite side, and the sliding sleeve is rotatably connected to the inside of the fixing strip.

[0035] The power assembly includes a motor and two bevel gears respectively fixedly sleeved on the outside of the motor output shaft and the outside of one of the sliding sleeves;

[0036] The two bevel gears are meshed with each other;

[0037] The motor in one of the adjusting mechanisms is installed inside the first fixing seat, and the motor in the other adjusting mechanism is installed inside the sliding seat.

[0038] A car bumper is prepared by adopting a car bumper production process.

[0039] Compared with the prior art, the automobile bumper and the production process thereof provided by the present invention have the following beneficial effects:

[0040] 1. The coolant is replaced by driving the piston to move, which avoids the problem of scale layer easily forming inside the cooling channel after the coolant passes through it for a long time, thus affecting the cooling effect. In addition, by setting up multiple unconnected cooling channels, the problem of large temperature difference between the front and back of the coolant when passing through the cooling channel due to the long curved and continuous cooling channel is avoided, thereby improving the uniformity of cooling in each area of ​​the mold base;

[0041] 2. By driving the coolant entering the cooling channel to keep rotating, the columnar coolant circulates inside and outside to exchange heat with the inside of the mold base, thereby ensuring that the coolant can maintain a good cooling effect from the time it enters the cooling channel to the time it is discharged from the cooling channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0043] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0044] Figure 2 It is a schematic diagram of the structure of the bidirectional cooling mechanism of the present invention;

[0045] Figure 3 It is a schematic diagram of the structure of the bidirectional cooling mechanism and the regulating mechanism of the present invention;

[0046] Figure 4 It is a schematic diagram of the internal structure of the cooling channel of the present invention;

[0047] Figure 5 For the present invention Figure 4 A schematic diagram of the structure enlargement in the middle;

[0048] Figure 6 It is a schematic diagram of the structure of the power assembly of the present invention.

[0049] Description of reference numerals:

[0050] 1. Base; 2. First fixed seat; 3. Second fixed seat; 4. Mold base; 5. Slide; 6. First hydraulic cylinder; 7. Guide rod; 8. Cooling channel; 9. Injection pipe; 10. Piston; 11. Transmission shaft; 12. Liquid inlet pipe; 13. First main pipe; 14. First one-way valve; 15. Liquid discharge pipe; 16. Second main pipe; 17. Second one-way valve; 18. Lifting bar; 19. Connecting block; 20. Second hydraulic cylinder; 21. Impeller; 22. Sliding sleeve; 23. Transmission member; 24. Fixing bar; 25. Motor; 26. Bevel gear. DETAILED DESCRIPTION

[0051] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0052] Example: See Figure 1 - Figure 6 , a car bumper production process, comprising the following steps:

[0053] S1. First, a car bumper embryo is obtained by injection molding through an injection molding device;

[0054] S2. The automobile bumper blank is clamped and sent to the conveyor by a robot;

[0055] S3, conveying the automobile bumper embryo to a polishing station by a conveyor, and performing polishing treatment on the surface of the automobile bumper embryo;

[0056] S4, conveying the polished automobile bumper embryo to a painting station through a conveyor, and performing painting on the automobile bumper embryo;

[0057] S5, conveying the painted automobile bumper to a drying station through a conveyor to dry the automobile bumper;

[0058] S6. The automobile bumper after drying is conveyed to the inspection station by a conveyor to inspect the automobile bumper.

[0059] Injection molding equipment includes:

[0060] A base 1, a first fixing seat 2 is installed on one side of the top of the base 1, and a second fixing seat 3 is installed on the other side of the top of the base 1;

[0061] The slide 5 is arranged between the first fixed seat 2 and the second fixed seat 3. A mold base 4 is installed on the outer wall of the slide 5 on the opposite side of the first fixed seat 2. An injection pipe 9 is installed on the first fixed seat 2. The injection pipe 9 is connected to one of the mold bases 4. The slide 5 and the mold base 4 connected thereto are provided with an ejection mechanism (existing technology) inside to facilitate demolding of the bumper after molding;

[0062] A driving mechanism is mounted on the second fixed seat 3 and is used to drive the slide 5 to move. The driving mechanism includes a plurality of first hydraulic cylinders 6 mounted on the second fixed seat 3 and a plurality of guide rods 7 fixed between the first fixed seat 2 and the second fixed seat 3; the extended end of the first hydraulic cylinder 6 is fixed to the outer wall of the slide 5; the slide 5 is slidably sleeved on the outside of the plurality of guide rods 7;

[0063] By controlling the extension of the first hydraulic cylinder 6, the slide 5 is driven to slide rightward along the outside of the guide rod 7, so that the mold base 4 on the left and the mold base 4 on the right are merged together, and then the injection plastic is injected into the two mold bases 4 through the injection pipe 9. After the bumper is cooled and formed, the first hydraulic cylinder 6 is controlled to shorten, driving the slide 5 and the mold base 4 on its outer wall to move leftward, so that the two mold bases 4 are separated, and the bumper is driven to separate from the mold base 4 by the ejection mechanism, and then the bumper is removed from between the two mold bases 4 by the robot.

[0064] A two-way cooling mechanism is provided, and is respectively installed inside the two mold bases 4, for cooling the inside of the two mold bases 4 respectively. The two-way cooling mechanism includes a plurality of cooling channels 8 installed inside the mold base 4, a supply assembly installed at the top and bottom of the plurality of cooling channels 8, and two discharge assemblies respectively installed at the top and bottom of the cooling channels 8; a piston 10 is installed inside the cooling channel 8, and a transmission shaft 11 is rotatably connected inside the piston 10, and the top of the transmission shaft 11 extends to the outside of the mold base 4, and a lifting assembly for driving the transmission shaft 11 to move is provided above the mold base 4, and the supply assembly includes two liquid inlet pipes 12 respectively installed at the top and bottom of the cooling channel 8 and a first main flow pipe 13 installed at the other end of the two liquid inlet pipes 12, and the first main flow pipe 13 is connected to the coolant storage tank; the first main flow pipe 13 in one of the two-way cooling mechanisms is installed on the outer wall of the first fixed seat 2 , the first main flow pipe 13 in the other two-way cooling mechanism is installed on the outer wall of the slide 5; the two liquid inlet pipes 12 are both installed with a first one-way valve 14, the discharge assembly includes two drainage pipes 15 respectively installed at the top and bottom of the cooling channel 8 and two second main flow pipes 16 respectively installed at the other ends of the two drainage pipes 15, and the second main flow pipes 16 are connected to the coolant recovery tank; the two second main flow pipes 16 are respectively installed at the top and bottom of the mold base 4; the two drainage pipes 15 are both installed with a second one-way valve 17, and the lifting assembly includes a lifting bar 18 rotatably connected to the top of a plurality of transmission shafts 11 and a plurality of connecting blocks 19 fixedly connected to the outer wall of one side of the lifting bar 18; the bottom of the connecting block 19 is connected with a second hydraulic cylinder 20, wherein the second hydraulic cylinder 20 in one of the two-way cooling mechanisms is installed inside the first fixed seat 2, and the second hydraulic cylinder 20 in the other two-way cooling mechanism is installed inside the slide 5;

[0065] When the two mold bases 4 are closed and the material is injected, the second hydraulic cylinder 20 is controlled to drive the connecting block 19 and the lifting bar 18 to move up and down. In this process, the piston 10 is driven to move up and down along the inner wall of the cooling channel 8 by the transmission shaft 11. When the piston 10 moves upward, the first one-way valve 14 at the bottom and the second one-way valve 17 at the top are in the open state, and the first one-way valve 14 at the top and the second one-way valve 17 at the bottom are in the closed state, so the coolant is pumped into the cooling channel 8 through the bottom liquid inlet pipe 12, and the coolant on the top of the piston 10 is discharged through the upper liquid discharge pipe 15. When the piston 10 moves downward, the first one-way valve 14 at the bottom and the second one-way valve 17 at the top are in the closed state, and the upper first one-way valve 14 and the second one-way valve 17 at the bottom are in the closed state. The first one-way valve 14 and the second one-way valve 17 below are in the open state, so the coolant is pumped into the cooling channel 8 through the top liquid inlet pipe 12, and the coolant at the bottom of the piston 10 is discharged through the lower liquid discharge pipe 15, and the coolant is circulated in sequence, and the injection plastic inside the mold base 4 is cooled by reciprocatingly pumping the coolant. The coolant is replaced by driving the piston 10 to move, thereby avoiding the problem that a scale layer is easily formed in the cooling channel 8 after the coolant passes through it for a long time, thereby affecting the cooling effect. In addition, by setting up a plurality of unconnected cooling channels 8, the problem of a large temperature difference between the front and rear of the coolant when passing through the cooling channel 8 due to the long curved and continuous cooling channel 8 is avoided, thereby improving the uniformity of cooling in various areas of the mold base 4.

[0066] The regulating mechanism is connected with the bidirectional cooling mechanism and is used to drive the rotational flow of the coolant. The regulating mechanism includes two impellers 21 fixedly sleeved on the outside of the transmission shaft 11, a sleeve 22 slidably sleeved on the outside of the transmission shaft 11, and a power assembly for driving one of the sleeves 22 to rotate; the two impellers 21 are respectively located at the top and bottom of the piston 10; the two adjacent sleeves 22 are connected by a transmission member 23, and the transmission member 23 includes two synchronous wheels fixedly sleeved on the outside of the two sleeves 22 and a synchronous belt connected to the outside of the two synchronous wheels; the outer walls of the first fixed seat 2 and the slide seat 5 on the opposite side are fixedly connected with a fixing bar 24, the sleeve 22 is rotatably connected to the inside of the fixing bar 24, and the power assembly includes a motor 25 and two bevel gears 26 fixedly sleeved on the outside of the output shaft of the motor 25 and the outside of one of the sleeves 22; the two bevel gears 26 are meshed with each other; the motor 25 in one of the regulating mechanisms is installed in the inside of the first fixed seat 2, and the motor 25 in the other regulating mechanism is installed in the inside of the slide seat 5;

[0067] When the transmission shaft 11 moves up and down, the fixing bar 24 is set so that the sleeves 22 do not rise and fall accordingly. The bevel gear 26 outside the output shaft is driven to rotate by the control motor 25. Through the meshing effect of the two bevel gears 26, one of the sleeves 22 is driven to rotate. Through the transmission connection of the transmission parts 23, multiple sleeves 22 are driven to rotate synchronously, and then the transmission shafts 11 are driven to rotate while rising and falling, thereby driving the two impellers 21 at the top and bottom of the piston 10 to rotate synchronously, and driving the coolant entering the cooling channel 8 to keep rotating, so that the columnar coolant circulates inside and outside and exchanges heat with the inside of the mold base 4, thereby ensuring that the coolant can maintain a good cooling effect from entering the cooling channel 8 to being discharged from the cooling channel 8.

[0068] A car bumper is prepared by adopting a car bumper production process.

[0069] It should be noted that the device structure and drawings of the present invention mainly describe the principle of the present invention. In terms of the technology of the design principle, the settings of the power mechanism, power supply system and control system of the device are not fully described. On the premise that the technical personnel in the field understand the principle of the above invention, the specific details of the power mechanism, power supply system and control system can be clearly known. The control method of the application document is to automatically control by a controller, and the control circuit of the controller can be realized by simple programming by the technical personnel in the field; the above only describes some exemplary embodiments of the present invention by way of explanation. Undoubtedly, for ordinary technicians in the field, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

[0070] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0071] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

Claims

1. A process for producing an automobile bumper, characterized in that: The steps include: S1. First, a car bumper embryo is obtained by injection molding through an injection molding device; S2. The automobile bumper blank is clamped and sent to the conveyor by a robot; S3, conveying the automobile bumper embryo to a polishing station by a conveyor, and performing polishing treatment on the surface of the automobile bumper embryo; S4, conveying the polished automobile bumper embryo to a painting station through a conveyor, and performing painting on the automobile bumper embryo; S5, conveying the painted automobile bumper to a drying station through a conveyor to dry the automobile bumper; S6. The automobile bumper after drying is conveyed to the inspection station by a conveyor to inspect the automobile bumper.

2. The automobile bumper production process according to claim 1, characterized in that: The injection molding equipment comprises: A base (1), wherein a first fixing seat (2) is installed on one side of the top of the base (1), and a second fixing seat (3) is installed on the other side of the top of the base (1); A slide seat (5) is arranged between the first fixed seat (2) and the second fixed seat (3); a mold seat (4) is installed on the outer wall of the slide seat (5) on the side opposite to the first fixed seat (2); an injection pipe (9) is installed on the first fixed seat (2); and the injection pipe (9) is connected to one of the mold seats (4); A driving mechanism, which is mounted on the second fixed seat (3) and is used to drive the slide seat (5) to move; Two bidirectional cooling mechanisms are provided and are respectively installed inside the two mold bases (4) for cooling the inside of the two mold bases (4) respectively; The regulating mechanism is connected to the bidirectional cooling mechanism and is used to drive the cooling liquid to flow in a rotational direction.

3. The automobile bumper production process according to claim 2, characterized in that: The driving mechanism comprises a plurality of first hydraulic cylinders (6) mounted on the second fixed seat (3) and a plurality of guide rods (7) fixedly connected between the first fixed seat (2) and the second fixed seat (3); The extended end of the first hydraulic cylinder (6) is fixedly connected to the outer wall of the slide seat (5); The sliding seat (5) is slidably sleeved on the outside of a plurality of guide rods (7).

4. The automobile bumper production process according to claim 3, characterized in that: The bidirectional cooling mechanism comprises a plurality of cooling channels (8) installed inside the mold base (4), a supply assembly installed at the top and bottom of the plurality of cooling channels (8), and two discharge assemblies installed at the top and bottom of the cooling channels (8) respectively; A piston (10) is installed inside the cooling channel (8), and a transmission shaft (11) is rotatably connected inside the piston (10). The top end of the transmission shaft (11) extends to the outside of the mold base (4), and a lifting component for driving the transmission shaft (11) to move is provided above the mold base (4).

5. The automobile bumper production process according to claim 4, characterized in that: The supply assembly comprises two liquid inlet pipes (12) respectively installed at the top and bottom ends of the cooling channel (8) and a first main flow pipe (13) installed at the other ends of the two liquid inlet pipes (12); The first main flow pipe (13) in one of the two-way cooling mechanisms is mounted on the outer wall of the first fixed seat (2), and the first main flow pipe (13) in the other two-way cooling mechanism is mounted on the outer wall of the sliding seat (5); A first one-way valve (14) is installed on each of the two liquid inlet pipes (12).

6. The automobile bumper production process according to claim 5, characterized in that: The discharge assembly comprises two liquid discharge pipes (15) respectively installed at the top and bottom ends of the cooling channel (8) and two second main flow pipes (16) respectively installed at the other ends of the two liquid discharge pipes (15); The two second main flow pipes (16) are respectively installed on the top and bottom of the mold base (4); A second one-way valve (17) is installed on each of the two liquid discharge pipes (15).

7. The automobile bumper production process according to claim 6, characterized in that: The lifting assembly comprises a lifting bar (18) rotatably connected to the top ends of a plurality of transmission shafts (11) and a plurality of connection blocks (19) fixedly connected to an outer wall of one side of the lifting bar (18); The bottom of the connection block (19) is connected to a second hydraulic cylinder (20), wherein the second hydraulic cylinder (20) in one bidirectional cooling mechanism is installed inside the first fixed seat (2), and the second hydraulic cylinder (20) in the other bidirectional cooling mechanism is installed inside the sliding seat (5).

8. The automobile bumper production process according to claim 7, characterized in that: The regulating mechanism comprises two impellers (21) fixedly sleeved on the outside of the transmission shaft (11), a sleeve (22) slidably sleeved on the outside of the transmission shaft (11), and a power assembly for driving one of the sleeves (22) to rotate; The two impellers (21) are respectively located at the top and bottom of the piston (10); Two adjacent sliding sleeves (22) are connected in transmission via a transmission member (23), wherein the transmission member (23) comprises two synchronous wheels respectively fixedly sleeved on the outside of the two sliding sleeves (22) and a synchronous belt connected in transmission to the outside of the two synchronous wheels; A fixing strip (24) is fixedly connected to the outer wall of the first fixing seat (2) and the sliding seat (5) on the opposite side, and the sliding sleeve (22) is rotatably connected to the inside of the fixing strip (24).

9. The automobile bumper production process according to claim 8, characterized in that: The power assembly comprises a motor (25) and two bevel gears (26) respectively fixedly sleeved on the outside of the output shaft of the motor (25) and the outside of one of the sliding sleeves (22); The two bevel gears (26) are meshed with each other; The motor (25) in one of the adjustment mechanisms is installed inside the first fixed seat (2), and the motor (25) in the other adjustment mechanism is installed inside the sliding seat (5).

10. An automobile bumper, characterized in that: It is manufactured by adopting the automobile bumper production process as claimed in claim 9.

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