Ejection structure of automobile bumper injection mold

Abstract

The utility model provides an ejection structure of an automobile bumper injection mold, which comprises a lower mold base, two first electric push rods are respectively arranged on the left side and the right side of the lower mold base, an upper mold base is arranged among the telescopic ends of the four first electric push rods, the upper mold base and the lower mold base are installed in a matched mode, and a liquid inlet pipe is arranged at the upper end of the upper mold base. The liquid inlet pipe communicates with the interior of the upper die base, an ejection mechanism used for ejecting the automobile bumper is arranged in the lower die base, and a supporting assembly is arranged at the lower end of the lower die base. According to the ejection structure of the automobile bumper injection mold, when the automobile bumper is ejected and demolded, the buffer component is arranged, so that the ejection force can be uniformly dispersed, the local stress is reduced, the automobile bumper is prevented from being damaged due to overlarge ejection force, and the production quality of the automobile bumper is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile bumper injection production, in particular to an ejection structure of an automobile bumper injection mold. Background Art

[0002] Car bumper injection molding refers to the process of manufacturing car bumpers through injection molding. Injection molding is an industrial processing method that heats plastic particles to a molten state and then injects them into a pre-designed mold cavity under high pressure. After cooling and solidification, the final desired bumper shape and structure are formed. The ejection structure of the car bumper injection mold is a key part that helps to remove the bumper from the mold after injection molding. Usually, this ejection structure may include a slanted ejector, a straight ejector, a slider, a nitrogen spring, an ejector pin and other components. They work together to ensure that the bumper can be smoothly and completely separated from the inside of the mold after cooling and hardening without causing damage or deformation. The ejection structure of the existing car bumper injection mold lacks buffering when ejecting and demolding the injection-molded car bumper, which may cause the car bumper to deform during ejection and demolding.

[0003] For example, the utility model with announcement number CN217373317U discloses an ejection structure of an automobile bumper injection mold, in which a hydraulic pump is fixedly connected to the side of a support plate, an output end of the hydraulic pump is connected to a top plate through a hydraulic rod, a push plate is welded on the top of the top plate, and a straight rod is fixedly connected to the side of the push plate. In this patent scheme, the straight rod is moved upward by a hydraulic pump to realize the ejection and demolding of the automobile bumper. Due to the lack of a buffer design, the straight rod acts directly on the rigid bumper, which may cause local stress concentration, thereby causing the bumper to break due to uneven force at the moment of demolding or later deformation caused by internal stress. For complex bumper structures, especially those with inserts, buckles or other fine structures, the lack of buffering may cause damage or breakage of these parts. Utility Model Content

[0004] In view of this, the utility model aims to solve the deficiencies in the prior art and provides an ejection structure for an automobile bumper injection mold. When the automobile bumper is ejected and demolded, a buffer component is provided to evenly disperse the ejection force, reduce local stress, avoid damage to the automobile bumper due to excessive ejection force, and improve the production quality of the automobile bumper.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: an ejection structure of an automobile bumper injection mold, including a lower mold base, two electric push rods are respectively arranged on the left and right sides of the lower mold base, an upper mold base is arranged between the telescopic ends of the four electric push rods, the upper mold base is installed in cooperation with the lower mold base, a liquid inlet pipe is arranged at the upper end of the upper mold base, the liquid inlet pipe is communicated with the interior of the upper mold base, an ejection mechanism for ejecting the automobile bumper is arranged inside the lower mold base, a supporting assembly is arranged at the lower end of the lower mold base, the ejection mechanism includes two ejection frames slidably arranged inside the lower mold base, the left and right positions of the two ejection frames correspond, the lower ends of the two ejection frames are arranged with a buffer assembly, the buffer assembly includes rotating frames respectively arranged at the lower ends of the two ejection frames, the interiors of the two rotating frames are rotatably connected with connecting frames, and the two connecting frames adjacent to the left and right are connected to each other. The parts are rotatably connected by a pin shaft, and a connecting plate is provided at the lower end of the lower mold seat, and a sliding plate is slidably provided inside the connecting plate, and two rectangular plates corresponding to the left and right positions are provided at the upper end of the sliding plate, and sliding columns are slidably provided inside the two rectangular plates, and a rotating seat is provided on the relatively inner ends of the two sliding columns. The ends of the four connecting frames away from the rotating frames are respectively rotatably connected to the adjacent rotating seats, and elastic units are respectively provided between the rectangular plate and the rotating seats, and a driving unit for driving the sliding plate to move is provided at the upper end of the connecting plate, and the elastic unit includes a spring arranged between the rectangular plate and the rotating seat, and the two springs are respectively sleeved on the outer arc surfaces of the corresponding sliding columns, and the driving unit includes two electric push rods corresponding to the left and right positions arranged on the bottom wall of the connecting plate, and the telescopic ends of the two electric push rods are commonly connected to the lower end of a sliding plate.

[0006] As a further improvement of the present invention, a control panel is arranged on the front side of the lower die base, and the electric push rod 1 and the electric push rod 2 are both electrically connected to the control panel.

[0007] As a further improvement of the utility model, the support assembly includes support frames arranged at the four corners of the lower end of the lower mold base, and a mounting plate is respectively arranged between the lower ends of two adjacent support frames, and two mounting holes are provided inside the two mounting plates.

[0008] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0009] First, the molten plastic liquid is injected into the space between the lower mold base and the upper mold base through the liquid inlet pipe, and the coolant between the lower mold base and the upper mold base is cooled and formed into a car bumper. Then, the electric push rod is opened through the control panel to make the telescopic end drive the upper mold base to move upward, making it easier for personnel to separate the upper mold base from the lower mold base.

[0010] Secondly, the control panel is used to control the opening of the electric push rod 2, and the telescopic end causes the rectangular plate on the sliding plate to move upward, so that the sliding columns inside the rectangular plate slide towards each other and away from each other, thereby causing the connecting frames inside the rotating seats on both sides to rotate and shrink around the central pin shaft, driving the top frames on the two rotating frames to move upward, and at the same time, the elastic characteristics of the spring can achieve flexible contact between the top frame and the car bumper. Subsequently, the telescopic end of the electric push rod 2 continues to move upward, and the car bumper that has been injection molded in the lower mold seat is ejected through the top frame. When the car bumper is ejected and demolded, a buffer component is provided to evenly disperse the ejection force, reduce local stress, and avoid damage to the car bumper due to excessive ejection force, thereby improving the production quality of the car bumper.

[0011] Thirdly, the lower die base can be fixed through the mounting holes inside the mounting plate, making the ejection structure more stable.

[0012] Fourthly, the various electrical components on the ejection structure can be quickly controlled through the control panel, making it easy for personnel to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the lower die base structure of the utility model;

[0016] Figure 3 It is a front cross-sectional structural schematic diagram of the utility model;

[0017] Figure 4 It is a schematic diagram of the enlarged structure of point A of the utility model.

[0018] In the figure: 101, lower die base; 102, upper die base; 103, liquid inlet pipe; 104, electric push rod 1; 105, support frame; 106, mounting plate; 107, mounting hole; 201, connecting plate; 202, electric push rod 2; 203, top frame; 204, sliding plate; 205, sliding column; 206, rotating frame; 207, spring; 208, rectangular plate; 209, rotating seat; 210, connecting frame; 301, control panel. DETAILED DESCRIPTION

[0019] In order to better understand the present invention, the content of the present invention is further clearly described below in conjunction with the embodiments, but the protection content of the present invention is not limited to the following embodiments. In the following description, a large number of specific details are given in order to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details.

[0020] like Figure 1 , 2 As shown in Figures 3 and 4, an ejection structure of an injection mold for an automobile bumper comprises a lower mold base 101, two electric push rods 104 are respectively arranged on the left and right sides of the lower mold base 101, an upper mold base 102 is arranged between the telescopic ends of the four electric push rods 104, the upper mold base 102 is installed in coordination with the lower mold base 101, a liquid inlet pipe 103 is arranged at the upper end of the upper mold base 102, the liquid inlet pipe 103 is communicated with the interior of the upper mold base 102, an ejection mechanism for ejecting the automobile bumper is arranged inside the lower mold base 101, and a supporting assembly is arranged at the lower end of the lower mold base 101.

[0021] like Figure 1 , 2 As shown in , 3 and 4, the ejection mechanism includes two ejector frames 203 slidably arranged inside the lower die base 101, the left and right positions of the two ejector frames 203 correspond, and the lower ends of the two ejector frames 203 are provided with buffer components, and the buffer components include rotating frames 206 respectively provided at the lower ends of the two ejector frames 203, and the interiors of the two rotating frames 206 are both rotatably connected with connecting frames 210, and the middle parts of the two connecting frames 210 adjacent to the left and right are rotatably connected through pin shafts, and the lower end of the lower die base 101 is provided with a connecting plate 201, and the interior of the connecting plate 201 is slidably provided with a sliding plate 204, and the upper end of the sliding plate 204 is provided with two rectangular plates 208 corresponding to the left and right positions, and the interiors of the two rectangular plates 208 are both slidably provided with sliding columns 205, and the two sliding A rotating seat 209 is provided on the relative inner ends of the column 205, and the ends of the four connecting frames 210 away from the rotating frame 206 are respectively rotatably connected to the adjacent rotating seat 209. Elastic units are respectively provided between the rectangular plate 208 and the rotating seat 209. A driving unit for driving the sliding plate 204 to move is provided at the upper end of the connecting plate 201. The elastic unit includes a spring 207 arranged between the rectangular plate 208 and the rotating seat 209. The two springs 207 are respectively sleeved on the corresponding outer arc surfaces of the sliding column 205. The driving unit includes two electric push rods 202 corresponding to the left and right positions arranged on the bottom wall of the connecting plate 201. The telescopic ends of the two electric push rods 202 are commonly connected to the lower end of a sliding plate 204.

[0022] like Figure 1 , 2As shown, a control panel 301 is disposed on the front side of the lower mold base 101 , and the electric push rod 1 104 and the electric push rod 2 202 are both electrically connected to the control panel 301 .

[0023] The molten plastic liquid is injected between the lower mold base 101 and the upper mold base 102 through the liquid inlet pipe 103, and the coolant between the lower mold base 101 and the upper mold base 102 is cooled and formed into a car bumper. Then, the control panel 301 is used to control the opening of the electric push rod 104, so that the telescopic end drives the upper mold base 102 to move upward. Then, the control panel 301 is used to control the opening of the electric push rod 202, and the telescopic end causes the rectangular plate 208 on the sliding plate 204 to move upward, so that the sliding column 205 inside the rectangular plate 208 slides towards each other and away from each other, thereby causing the connecting frame 210 inside the rotating seats 209 on both sides to rotate and shrink around the central pin shaft, driving the top frame 203 on the two rotating frames 206 to move upward, and at the same time, the elastic characteristics of the spring 207 can realize the flexible contact between the top frame 203 and the car bumper, and then the telescopic end of the electric push rod 202 continues to move upward, and the car bumper that has been injection molded inside the lower mold base 101 is ejected through the top frame 203.

[0024] According to another embodiment of the present invention, Figure 1 , 2 As shown, the support assembly includes support frames 105 arranged at the four corners of the lower end of the lower mold base 101, and a mounting plate 106 is respectively arranged between the lower ends of the two adjacent support frames 105. Two mounting holes 107 are provided inside the two mounting plates 106. The lower mold base 101 can be fixed through the mounting holes 107 inside the mounting plates 106, so that the ejection structure can operate more stably.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. An ejection structure of an automobile bumper injection mold, comprising a lower mold base (101), Features: Two electric push rods (104) are respectively arranged on the left and right sides of the lower die base (101); an upper die base (102) is arranged between the telescopic ends of the four electric push rods (104); the upper die base (102) is installed in cooperation with the lower die base (101); a liquid inlet pipe (103) is arranged at the upper end of the upper die base (102); the liquid inlet pipe (103) is communicated with the interior of the upper die base (102); an ejection mechanism for ejecting a car bumper is arranged inside the lower die base (101); a support assembly is arranged at the lower end of the lower die base (101); the ejection mechanism comprises two ejection frames (203) slidably arranged inside the lower die base (101); the left and right positions of the two ejection frames (203) correspond; a buffer assembly is arranged at the lower ends of the two ejection frames (203); the buffer assembly comprises a rotating frame (206) respectively arranged at the lower ends of the two ejection frames (203); the two rotating frames (206) are arranged at the lower ends of the two ejection frames (203); The interior of the movable frame (206) is rotatably connected with a connecting frame (210), and the middle parts of two adjacent connecting frames (210) on the left and right are rotatably connected through a pin shaft. A connecting plate (201) is provided at the lower end of the lower mold base (101), and a sliding plate (204) is slidably provided inside the connecting plate (201). Two rectangular plates (208) corresponding to the left and right positions are provided at the upper end of the sliding plate (204). Sliding columns (205) are slidably provided inside the two rectangular plates (208), and a rotating seat (209) is provided on the opposite inner ends of the two sliding columns (205). One end of the four connecting frames (210) away from the rotating frame (206) is respectively rotatably connected to the inside of the adjacent rotating seat (209), and elastic units are respectively provided between the rectangular plates (208) and the rotating seat (209). The upper end of the connecting plate (201) is provided with a driving unit for driving the sliding plate (204) to move.

2. The ejection structure of the automobile bumper injection mold according to claim 1, Features: The elastic unit comprises a spring (207) arranged between a rectangular plate (208) and a rotating seat (209), and two springs (207) are respectively sleeved on the outer arc surfaces of corresponding sliding columns (205).

3. The ejection structure of the automobile bumper injection mold according to claim 1, Features: The driving unit comprises two corresponding electric push rods 2 (202) arranged on the bottom wall of the connecting plate (201), and the telescopic ends of the two electric push rods 2 (202) are commonly connected to the lower end of a sliding plate (204).

4. The ejection structure of the automobile bumper injection mold according to claim 1, Features: The support assembly comprises support frames (105) arranged at the four corners of the lower end of the lower die base (101), a mounting plate (106) is respectively arranged between the lower ends of two front and rear adjacent support frames (105), and two mounting holes (107) are provided inside the two mounting plates (106).

5. The ejection structure of the automobile bumper injection mold according to claim 3, Features: A control panel (301) is provided on the front side of the lower die base (101), and both the electric push rod 1 (104) and the electric push rod 2 (202) are electrically connected to the control panel (301).

Images