An injection mold for producing automobile bumpers

Abstract

The present invention discloses an injection mold for producing automobile bumpers, which includes a core plate group and an ejector pin plate group. The core plate group includes a core plate, a core block, and an inclined ejector block assembly; the ejector pin plate group includes a first ejector pin plate, a second ejector pin plate, a straight ejector rod for connecting the first ejector pin plate and the core block, and an ejector pin rod for connecting the second ejector pin plate and the inclined ejector block assembly. The inclined ejector rod assembly includes an inclined ejector block that slides obliquely on the core block, a driving slider connected to the ejector pin rod, and a cooling water pipe group with one end fixed on the inclined ejector block and the other end slidably arranged on the driving slider; a forming portion for forming an undercut of the bumper is arranged on the inclined ejector block, and a gate runner for forming an undercut of the bumper is arranged on the driving slider, and the end of the gate runner communicates with the forming portion. The present application has the effect that the cooling water pipe group in the inclined ejector block assembly not only cools the inclined ejector block but also drives the movement of the inclined ejector block.

Description

Technical Field

[0001] The present invention relates to the field of automotive parts processing, and particularly to an injection mold for producing automotive bumpers. Background Art

[0002] Automobile bumpers are installed at the front and rear ends of the vehicle. They not only have a decorative function, but more importantly, they are safety devices that absorb and mitigate external impact forces, protect the vehicle body and the safety of the vehicle occupants.

[0003] As Figure 1 For the bumper shown, since there is a large glue position area after more materials on the side plates of the bumper, it is necessary to arrange a lifter block with cooling water. However, due to the limitation of the space position in this area, the lifter rod cannot be directly arranged. At the same time, since an undercut 40 structure needs to be set on the inner wall of this area and cannot be directly withdrawn, the movement position and movement mode of the lifter block are more troublesome in the narrow mold space. Therefore, the inventor believes that the existing molds cannot directly process this product. Summary of the Invention

[0004] In order to be able to directly process this bumper, the present application provides an injection mold for producing automotive bumpers.

[0005] The injection mold for producing automotive bumpers provided by the present application adopts the following technical solutions:

[0006] An injection mold for producing automotive bumpers, comprising:

[0007] A core plate group, including a core plate, a core block arranged on the core plate, and a lifter block assembly;

[0008] A thimble plate group, including a first thimble plate provided with a first oil cylinder, a second thimble plate provided with a second oil cylinder, a straight thimble rod for connecting the first thimble plate and the core block, and a thimble rod for connecting the second thimble plate and the lifter block assembly;

[0009] Wherein, the lifter rod assembly includes a lifter block that slides obliquely on the core block, a driving slider connected to the thimble rod, and a cooling water pipe group with one end fixed on the lifter block and the other end slidably arranged on the driving slider;

[0010] An undercut forming portion for forming the undercut of the bumper is arranged on the lifter block, a gate runner for forming the undercut of the bumper is arranged on the driving slider, and the end of the gate runner is communicated with the forming portion.

[0011] By adopting the above technical solution, after the bumper is injection-molded, it needs to be ejected from the core plate. The first ejector plate in the ejector plate group ejects the core block from the core plate through a direct ejector rod, that is, the bumper is initially ejected from the core plate. Subsequently, when the second ejector plate continues to operate, the ejector rod ejects the inclined ejector block assembly from the core block. At this time, when the driving slider moves upward, since the inclined ejector block is inclined on the core block and the cooling water pipe group connected to the core block slides on the driving slider, the inclined ejector block can slide in the inclined direction, and thus the forming part on the inclined ejector block can directly exit from the undercut, avoiding damage to the bumper. In addition to cooling the inner core block, the cooling water pipe group enables the core block to cool this part of the bumper, and also plays a guiding role, so that there is no need to additionally set up a linkage mechanism to push the core block. On the other hand, the setting of the gate runner on the driving slider can directly divert the material to the inner wall of the inner bumper, effectively avoiding the formation of gate marks on the surface of the bumper, and at the same time enabling the material in the gate runner to move together with the bumper.

[0012] Optionally, a forming block for serving as a side wall of the gate runner is slidably arranged on the driving slider;

[0013] A guiding inclined block for driving the forming block to approach the inlet of the gate runner is arranged on the core block, and a driving member for driving the forming block to move away from the inlet of the gate runner is arranged on the driving slider.

[0014] By adopting the above technical solution, the forming block serves as a part of the side wall of the gate runner. When the core block moves into the core block, due to the setting of the guiding inclined block on the core block, the forming block is forced to move on the driving slider. Finally, after the driving slider is completely immersed in the core block, the position of the forming block is positioned to form the side wall of the gate runner. When the driving slider moves out of the core block, the forming block is reset due to the setting of the driving member, and the gate runner is opened, enabling the material in the gate runner to directly move out of the gate runner, avoiding the phenomenon of tearing between the bumper and the driving slider during later extraction of the bumper.

[0015] Optionally, the forming block is provided with a guiding inclined surface that fits the inclined surface of the guiding inclined block;

[0016] The driving member includes a connecting rod fixed at one end to the forming block and slidably arranged on the driving slider, and an elastic member sleeved on the connecting rod.

[0017] By adopting the above technical solution, the guiding inclined surface provided on the forming block can better lift the box on the guiding inclined block, making the forming block slide more smoothly on the driving slider. On the other hand, the elastic member in the driving member makes the forming block still able to move towards the direction of the guiding inclined block by its own elastic restoring force when the forming block is gradually separated from the guiding inclined block, so that the space of the gate runner can be automatically expanded and the material in the gate runner can be directly removed.

[0018] Optionally, the cooling water pipe group includes a water inlet pipe and a water outlet pipe;

[0019] The front ends of the water inlet pipe and the water outlet pipe are fixed on the inclined ejector block and are both communicated with the cooling water path in the inclined ejector block. The water inlet pipe and the water outlet pipe are inserted and slidably arranged in the guide sleeves provided on the driving slider.

[0020] By adopting the above technical solution, the water inlet pipe and the water outlet pipe are communicated with the cooling water path in the inclined ejector block to realize the circulating water path of the cooling water. At the same time, the water inlet pipe and the water outlet pipe are slid on the driving slider through the guide sleeves, which makes the sliding more smooth on the one hand and avoids excessive wear between the driving slider and the water inlet pipe and the water outlet pipe on the other hand.

[0021] Optionally, a self-lubricating strip is arranged on the other end face of the inclined ejector block far away from the cooling water pipe group. A positioning inclined surface with a T-shaped strip is arranged on the core block, and the self-lubricating strip is slidably arranged on the T-shaped strip.

[0022] By adopting the above technical solution, the self-lubricating strip on the inclined ejector block and the T-shaped strip on the core block realize limit sliding. At the same time, due to the arrangement of the positioning inclined surface on the core block, the inclined ejector block can only be forced to slide obliquely on the core block. Therefore, when the driving slider moves upward, after the inclined ejector block is combined with the cooling water pipe group, the inclined ejector block can automatically slide to the other side of the cooling water pipe group, that is, automatically withdraw from the undercut of the bumper.

[0023] Optionally, the inclined ejector block is provided with installation holes for installing the water inlet pipe and the water outlet pipe, and multiple groups of sealing rings are arranged in the installation holes.

[0024] By adopting the above technical solution, the sealing rings at the installation holes can ensure the sealing performance of the water inlet pipe and the water outlet pipe during installation to the greatest extent, and further ensure the practical safety and service life of the whole mold.

[0025] Optionally, the ejector plate group further includes a plurality of inclined ejector rods connected to the ejector blocks on the core block and a guiding assembly for driving the inclined ejector rods to move.

[0026] By adopting the above technical solution, the setting of the guiding component can guide and buffer the movement of the angled ejector rod, avoiding the occurrence of deformation such as bending of its own structure when the slender angled ejector rod is directly subjected to a thrust force.

[0027] Optionally, the guiding component includes a positioning seat fixed on the second ejector plate, a guiding rod with its lower end fixed on the first ejector plate and having the same inclination as the angled ejector rod, and a guiding mounting member slidably moving horizontally on the positioning seat;

[0028] The guiding mounting member includes a positioning plate slidably connected to the positioning seat, a first positioning block and a second positioning block provided on the positioning plate. The lower end of the angled ejector rod is fixed on the first positioning block, and the guiding rod is inserted and slidably connected on the second positioning block.

[0029] By adopting the above technical solution, the guiding rod and the angled ejector rod are arranged in parallel and fixed on the first ejector plate. When the positioning seat moves with the second ejector plate, the second positioning block on the guiding rod drives the positioning plate to slide on the positioning seat, thereby driving the first positioning block to slide through the positioning plate, and then driving the angled ejector rod on the first positioning block to move on the core block. Through the transition of the positioning seat and the positioning plate, the deformation of the angled ejector rod caused by direct force is avoided.

[0030] Optionally, the cylinder body of the first oil cylinder is fixed on the core plate and the top end of the piston rod is fixed on the first ejector plate, and the cylinder body of the second oil cylinder is fixed on the second ejector plate and the top end of the piston rod is fixed on the first ejector plate.

[0031] By adopting the above technical solution, when the first oil cylinder operates, it drives the first ejector plate to drive the second ejector plate to move towards the core plate, and then when the second oil cylinder operates, it can independently drive the second ejector plate to move towards the core plate, thereby realizing the control of the movement of the angled ejector block assembly on the core block.

[0032] In summary, the present application includes at least one of the following beneficial technical effects:

[0033] 1. The cooling water pipe group in the angled ejector block assembly not only cools the angled ejector block but also drives the movement of the angled ejector block;

[0034] 2. Through the joint cooperation of the angled ejector block and the wedge block, the size of the gate runner is automatically changed, thereby realizing the material diversion of the gate runner and the direct falling off of the material at this part;

[0035] 3. By setting the guiding component, the slender angled ejector rod is prevented from directly receiving the thrust of the ejector plate group, avoiding the possibility of deformation. Description of the Drawings

[0036] Figure 1It is a schematic structural diagram of a bumper in the prior art.

[0037] Figure 2 It is a schematic structural diagram of a core plate group and an ejector plate group.

[0038] Figure 3 It is a front view of the ejector plate group.

[0039] Figure 4 It is a schematic structure of a lifter block assembly and a core block Figure 1 .

[0040] Figure 5 It is a schematic sectional view of a lifter block assembly and a core block.

[0041] Figure 6 It is a schematic structure of a lifter block assembly and a core block Figure 2 .

[0042] Figure 7 It is a schematic structure of a lifter block assembly and a core block Figure 3 , hiding the lifter block.

[0043] Figure 8 It is a partial sectional view of a lifter block assembly and a core block.

[0044] Figure 9 It is a schematic structural diagram of a first ejector plate, a second ejector plate, a lifter rod and a guiding assembly.

[0045] Figure 10 It is a schematic structural diagram of a first ejector plate, a lifter rod and a guiding assembly.

[0046] Explanation of reference numerals: 1. Core plate group; 2. Core plate; 3. Core block; 4. Lifter block assembly; 5. Ejector plate group; 6. First ejector plate; 7. First oil cylinder; 8. Second ejector plate; 9. Second oil cylinder; 10. Straight ejector rod; 11. Ejector pin rod; 12. Lifter block; 13. Driving slider; 1301. Through hole; 1302. Installation chamber; 14. Cooling water pipe group; 15. Forming part; 16. Gate runner; 17. Forming block; 18. Guiding inclined block; 19. Driving part; 20. Guiding inclined plane; 21. Connecting rod; 22. Elastic part; 23. Water inlet pipe; 24. Water outlet pipe; 25. Guide bushing; 26. Self-lubricating strip; 27. T-shaped strip; 28. Positioning inclined plane; 29. Installation hole; 30. Sealing ring; 31. Lifter rod; 32. Ejector block; 33. Guiding assembly; 34. Positioning seat; 35. Guide rod; 36. Guiding installation part; 37. Positioning plate; 38. First positioning block; 39. Second positioning block; 40. Undercut. Detailed implementation manners

[0047] The following further elaborates on this application in conjunction with the attached Figure 2-10 drawings.

[0048] An embodiment of the present application discloses an injection mold for producing an automotive bumper. Referring to FIG. 2, the injection mold for producing an automotive bumper includes a core plate group 1 and an ejector plate group 5 installed below the core plate group 1. The core plate group 1 includes a core plate 2 and a core block 3 slidably disposed on the core cavity of the core plate 2. At the same time, two inclined ejector block assemblies 4 are symmetrically arranged on the core block 3 for forming the undercut 40 part of the bumper.

[0049] Continuing to refer Figure 2 , the ejector plate group 5 includes two first ejector plates 6 and a second ejector plate 8 stacked on top of each other. On both sides of the first ejector plate 6, two groups of first oil cylinders 7 are respectively used to relatively fix it with the core plate 2. The cylinder block of the first oil cylinder 7 is fixed on the core plate 2, and the top of the piston rod is fixed on the first ejector plate 6. On the other hand, the second ejector plate 8 realizes relative movement with the first ejector plate 6 through a second oil cylinder 9. The number and distribution positions of the second oil cylinders 9 are the same as those of the first oil cylinders 7. The cylinder block of the second oil cylinder 9 is fixedly connected to the second ejector plate 8, and the top of the piston rod is connected to the second ejector plate 8.

[0050] Wherein referring Figure 3 , a plurality of straight ejector rods 10 are arranged between the first ejector plate 6 and the core block 3, so that when the first ejector plate 6 moves, the core block 3 can be directly ejected from the core plate 2, and then the bumper body can be preliminarily ejected from the core plate 2. The drive of the inclined ejector block assembly 4 is realized by arranging ejector rods 11 between the second ejector plate 8 and the inclined ejector block assembly 4. Therefore, when the first ejector plate 6 needs to eject the core block 3 and the inclined ejector block assembly 4 from the core plate 2, the first oil cylinder 7 starts to move, and the first ejector plate 6 and the second ejector plate 8 can be pulled up together. Then, when the inclined ejector block assembly 4 needs to move, the first oil cylinder 7 stops moving, and the second oil cylinder 9 starts to move. The second ejector plate 8 moves the inclined ejector block assembly 4 out of the core block 3 to disengage from the undercut 40 of the bumper.

[0051] Referring Figure 4 , the inclined ejector block assembly 4 includes an inclined ejector block 12 slidably disposed on the core block 3, a drive slider 13 fixedly connected to the top of the ejector rod 11, and a cooling water pipe group 14 positioned on the drive slider 13. The inclined ejector block 12 is provided with a molding part 15 for forming the undercut 40 of the bumper. After the injection molding is completed, the inclined ejector block 12 needs to be retracted from the undercut 40 to avoid the problem of tearing the bumper by the inclined ejector block 12.

[0052] Figure 4In the figure, the cooling water pipe group 14 includes two water pipes, namely an inlet pipe 23 and an outlet pipe 24. The outer ends of the inlet pipe 23 and the outlet pipe 24 are respectively connected to the cooling water system of the mold, and the inner ends are connected to the cooling water path arranged in the inclined top block 12. The inclined top block 12 is cooled by continuously discharging cooling water into the inlet pipe 23, thereby directly cooling the part of the bumper structure that contacts the inclined top block 12.

[0053] Reference Figure 4 and Figure 5 When the water inlet pipe 23 and the water outlet pipe 24 are connected to the inclined top block 12, two or more sets of sealing rings 30 are set on the connecting ends of the water inlet pipe 23 and the water outlet pipe 24, and then the end with the sealing ring 30 is directly inserted into the mounting hole 29 set in the inclined top block 12 for sealing connection, thereby ensuring the sealing effect of the cooling system. Before the water inlet pipe 23 and the water outlet pipe 24 are connected to the inclined top block 12, they need to be passed through the through hole 1301 set on the driving slider 13. The driving slider 13 is provided with two metal guide sleeves 25 in the through hole 1301. The guide sleeves 25 are used to realize radial positioning of the water inlet pipe 23 and the water outlet pipe 24, and at the same time avoid direct friction between the water inlet pipe 23 and the water outlet pipe 24 and the driving slider 13. In addition, when the guide sleeves 25 are damaged later, they can be directly replaced without replacing the entire driving slider 13.

[0054] Reference Figures 5 to 7 The other end of the inclined ejector block 12 away from the cooling water pipe group 14 is slidably connected to the core block 3. The inclined ejector block 12 is provided with a self-lubricating pressure strip 26 on the end surface. At the same time, a T-shaped strip 27 that can slide with the self-lubricating pressure strip 26 is provided on the side wall of the core block 3 corresponding to the end surface. At the same time, the side wall is in a state of a positioning inclined surface 28 with a certain inclined angle, so that the inclined ejector block 12 can be oriented and tilted and slid on the core block 3.

[0055] Reference Figure 6 When the ejector rod 11 pushes the driving slider 13 upward, since the water inlet pipe 23 and the water outlet pipe 24 are limited on the driving slider 13, and one side of the inclined ejector block 12 is limited on the core block 3, when the driving slider 13 moves upward, the inclined ejector block 12 can slide along the extension direction of the T-bar 27, so as to separate the inclined ejector block 12 and the driving slider 13 from each other. It should be noted here that the lifting direction of the ejector rod 11, the limiting direction of the cooling water pipe group 14 and the inclination direction of the T-bar 27 can be adjusted according to the actual required separation angle between the inclined ejector block 12 and the bumper. The inclined ejector block 12 is in a horizontal sliding movement state, so it can directly withdraw normally from the undercut 40 of the bumper, avoiding tearing of the bumper.

[0056] Reference Figure 7 and Figure 8, a gate runner 16 for forming an undercut 40 of the bumper is further provided on the driving slider 13, and the end of the gate runner 16 needs to be communicated with the forming portion 15 of the lifter block 12 (refer to Figure 4 ). A forming block 17 serving as a side wall on one side of the gate runner 16 is further slidably provided on the driving slider 13. A driving member 19 is connected to the other side wall of the forming block 17. The driving member 19 includes a connecting rod 21 for controlling the directional sliding of the forming block 17 and an elastic member 22 sleeved on the connecting rod 21 and used for resetting the forming block 17. The elastic member 22 is preferably a spring.

[0057] Continue to refer to Figure 7 and Figure 8 , an installation chamber 1302 for the forming block 17 to slide is provided inside the driving slider 13. At the same time, a placement groove for the elastic member 22 is provided at the end of the installation chamber 1302. The two ends of the connecting rod 21 are respectively located on the installation chamber 1302 and the placement groove. On the other hand, a guiding inclined block 18 is convexly provided on the core block 3. A guiding inclined surface 20 that fits with the guiding inclined block 18 is provided at the lower end of the forming block 17. When the driving slider 13 is inserted into the core block 3, the forming block 17 is completely attached to the core block 3. At this time, due to the setting of the guiding inclined block 18, the forming block 17 is forced to move closer to the side of the gate runner 16. At this time, the elastic member 22 is in a compressed state. When the driving slider 13 is ejected from the core block 3, due to the self-resetting force of the elastic member 22, the forming block 17 can be automatically pulled to move in the installation chamber. At this time, the space of the gate runner 16 increases, so that the moving space of the material waste located in the gate runner 16 increases, which facilitates the direct ejection of this part of the material and avoids tearing between the material waste and the bumper body.

[0058] Refer to Figure 9 , a plurality of ejector rods 31 connecting the ejector blocks 32 for forming the remaining undercut 40 parts of the bumper and a guiding component 33 for driving the ejector rods 31 to move in the core block 3 are further provided on the ejector plate group 5. The guiding component 33 includes a positioning seat 34 fixed to the lower end surface of the second ejector plate 8 by bolts and a guiding rod 35 with one end fixed to the first ejector plate 6. The inclination degree of the guiding rod 35 is the same as that of the ejector rod 31. A guiding mounting member 36 is horizontally slidably provided on the positioning seat 34. The guiding mounting member 36 includes positioning plates 37 embedded and slid on the inner walls of both sides of the positioning seat 34, a first positioning block 38 and a second positioning block 39 fixed to the positioning plates 37 by pin shafts.

[0059] Refer to Figure 9 and Figure 10, the lower end of the angled ejector rod 31 is fixed on the first positioning block 38, and the guide rod 35 is inserted and slidably mounted on the second positioning block 39. When the second ejector plate 8 moves relative to the first ejector plate 6, the positioning seat 34 moves upward with the second ejector plate 8. At the same time, due to the arrangement of the guide rod 35, the second positioning block 39 with the guide rod 35 can pull the positioning plate 37 to move horizontally, and then drive the first positioning block 38 to move through the positioning plate 37. Finally, the angled ejector rod 31 on the first positioning block 38 can be driven upward to move the ejector block 32 out of the core block 3. The arrangement of the guide rod 35 can prevent the second ejector plate 8 from directly applying force to the angled ejector rod 31, thereby ensuring that the slender angled ejector rod 31 will not have a large amount of deformation.

[0060] The implementation principle of an injection mold for producing automotive bumpers according to an embodiment of the present application is as follows: When it is necessary to eject the bumper from the core plate 2, the first oil cylinder 7 drives the first ejector plate 6 and the second ejector plate 8 to move together towards the core plate 2. At this time, the core block 3 is ejected from the core plate 2 through the straight ejector rod member 10 on the first ejector plate 6, and the overall part of the bumper is removed from the core plate 2; the second oil cylinder 9 drives the second ejector plate 8 to separate from the first ejector plate 6. At this time, the drive slider 13 in the angled ejector block assembly 4 controls the angled ejector block 12 to move on the core block 3, so that the forming portion 15 on the angled ejector block 12 is separated from the bumper undercut 40. At the same time, the angled ejector rod 31 separates the ejector block 32 from the inner wall of the bumper through the guide rod 35 assembly. On the other hand, while the drive slider 13 moves upward, the forming block 17 located inside the drive slider 13 automatically retracts, which is convenient for directly removing the material in the gate runner 16.

[0061] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An injection mold for producing automobile bumpers, characterized in that, it includes: A core plate group (1), including a core plate (2), a core block (3) arranged on the core plate (2), and a lifter block assembly (4); A ejector plate group (5), including a first ejector plate (6) provided with a first oil cylinder (7), a second ejector plate (8) provided with a second oil cylinder (9), a straight ejector rod (10) for connecting the first ejector plate (6) and the core block (3), and an ejector rod (11) for connecting the second ejector plate (8) and the lifter block assembly (4); Wherein, the lifter rod assembly includes a lifter block (12) sliding obliquely on the core block (3), a driving slider (13) connected to the ejector rod (11), and a cooling water pipe group (14) with one end fixed on the lifter block (12) and the other end slidably arranged on the driving slider (13); The lifter block (12) is provided with a forming part (15) for forming the undercut (40) of the bumper, the driving slider (13) is provided with a gate runner (16) for forming the undercut (40) of the bumper, and the end of the gate runner (16) is communicated with the forming part (15); A forming block (17) for serving as the side wall of the gate runner (16) is slidably arranged on the driving slider (13); A guiding inclined block (18) for driving the forming block (17) close to the entrance of the gate runner (16) is arranged on the core block (3), and a driving member (19) for driving the forming block (17) away from the entrance of the gate runner (16) is arranged on the driving slider (13).

2. The injection mold for producing automobile bumpers according to claim 1, characterized in that, The forming block (17) is provided with a guiding inclined surface (20) that fits the inclined surface of the guiding inclined block (18); The driving member (19) includes a connecting rod (21) with one end fixed on the forming block (17) and slidably arranged on the driving slider (13), and an elastic member (22) sleeved on the connecting rod (21).

3. The injection mold for producing automobile bumpers according to claim 1, characterized in that, The cooling water pipe group (14) includes a water inlet pipe (23) and a water outlet pipe (24); The front ends of the water inlet pipe (23) and the water outlet pipe (24) are fixed on the lifter block (12) and are both communicated with the cooling water path in the lifter block (12), and the water inlet pipe (23) and the water outlet pipe (24) are inserted and slidably arranged in a guide sleeve (25) arranged on the driving slider (13).

4. The injection mold for producing automobile bumpers according to claim 3, characterized in that, A self-lubricating strip (26) is arranged on the other end face of the lifter block (12) away from the cooling water pipe group (14), a positioning inclined surface (28) with a T-shaped strip (27) is arranged on the core block (3), and the self-lubricating strip (26) is slidably arranged on the T-shaped strip (27).

5. The injection mold for producing automobile bumpers according to claim 3, It is characterized in that mounting holes (29) for mounting the water inlet pipe (23) and the water outlet pipe (24) are arranged on the inclined ejector block (12), and multiple groups of sealing rings (30) are arranged in the mounting holes (29).

6. The injection mold for manufacturing an automobile bumper according to claim 1, It is characterized in that the ejector plate group (5) further includes a plurality of inclined ejector rods (31) connected to the ejector blocks (32) on the core block (3), and a guiding assembly (33) for driving the inclined ejector rods (31) to move.

7. The injection mold for manufacturing an automobile bumper according to claim 6, It is characterized in that the guiding assembly (33) includes a positioning seat (34) fixed on the second ejector plate (8), a guiding rod (35) with the lower end fixed on the first ejector plate (6) and having the same inclination as the inclined ejector rod (31), and a guiding mounting member (36) horizontally sliding on the positioning seat (34); the guiding mounting member (36) includes a positioning plate (37) slidably connected to the positioning seat (34), a first positioning block (38) and a second positioning block (39) arranged on the positioning plate (37), the lower end of the inclined ejector rod (31) is fixed on the first positioning block (38), and the guiding rod (35) is inserted and slid on the second positioning block (39).

8. The injection mold for manufacturing an automobile bumper according to claim 1, It is characterized in that the cylinder body of the first oil cylinder (7) is fixed on the core plate (2) and the top end of the piston rod is fixed on the first ejector plate (6), and the cylinder body of the second oil cylinder (9) is fixed on the second ejector plate (8) and the top end of the piston rod is fixed on the first ejector plate (6).

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