Efficient demolding structure of automobile part injection mold

Abstract

The utility model relates to the technical field of injection molds, and discloses an efficient demolding structure of an automobile part injection mold, which comprises a bearing plate, the middle of the bearing plate is fixedly connected with a lower mold, the upper end of the lower mold is provided with an injection molding groove, the inner side of the lower mold is provided with a ring body, and the upper side of the ring body is fixedly connected with an ejector pin. The upper end of the ejector pin is arranged in the lower mold in a penetrating mode, a first limiting rod is fixedly connected to the position, located on the outer side of the ejector pin, of the upper side of the ring body, the upper end of the first limiting rod is arranged in the lower mold in a penetrating mode, and a shell is arranged on the inner side of the ring body. During demolding, the arranged tension spring pulls the lifting disc and the piston rod to descend, so that the top of the piston rod is lower than the air guide pipe, and the arranged air pump is started to inject air between a part and a mold through the air guide pipe and the air outlet hole, so that the part is promoted to be separated from the mold, and the demolding efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to an efficient demolding structure for injection molds of automotive parts. Background Technology

[0002] An injection mold is a tool used for injection molding, typically consisting of a moving mold and a fixed mold. During injection molding, the moving and fixed molds close to form a gating system and cavity, into which molten plastic material is injected. After cooling and solidification, the plastic product is removed. Injection molds are suitable for mass production and molding of complex shapes, reducing the workload of mold design and manufacturing and improving production efficiency. Injection molds are indispensable for the injection molding of automotive parts.

[0003] After injection molding, molds always face the problem of demolding. Currently, the main demolding methods are manual demolding or mechanical demolding. Manual demolding has two problems: low demolding efficiency and increased labor costs. In addition, the temperature during mold injection is relatively high, and manual operation can easily cause burns. Mechanical demolding mostly uses ejector pins, but ejector pin demolding has the problem of uneven force distribution. The ejector pins cannot be ejected too quickly, as this can easily damage parts. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an efficient demolding structure for automotive parts injection molds. This structure improves demolding efficiency and avoids excessive demolding force that could damage the parts.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An efficient demolding structure for an injection mold of automotive parts includes a support plate, a lower mold fixedly connected to the middle of the support plate, an injection groove at the upper end of the lower mold, a ring body on the inner side of the lower mold, an ejector pin fixedly connected to the upper side of the ring body, the upper end of the ejector pin passing through the interior of the lower mold, a first limiting rod fixedly connected to the upper side of the ring body outside the ejector pin, the upper end of the first limiting rod passing through the interior of the lower mold, a housing on the inner side of the ring body, an air pump fixedly connected to the middle of the upper end of the housing, an air guide pipe fixedly connected to the outer side of the air pump, a tube body fixedly connected to the end of the air guide pipe, the lower end of the tube body passing through the interior of the housing, the upper end of the tube body passing through the interior of the lower mold, an air outlet in the middle of the tube body, a lifting plate on the lower side of the housing, a piston rod fixedly connected to the upper side of the lifting plate, the upper end of the piston rod movably disposed inside the air outlet, and a lifting assembly on the lower side of the lifting plate.

[0007] Furthermore, the lifting assembly includes a U-shaped plate fixedly connected to the lower side of the support plate, an installation plate fixedly connected to the middle of the U-shaped plate, pads fixedly connected to the upper sides of both ends of the installation plate, a rocker arm rotatably connected to the upper end of the pad, the opposite ends of the rocker arm being in close contact with the lower side of the lifting plate, and a tension spring fixedly connected to the middle of the upper side of the installation plate, the upper end of the tension spring being fixedly connected to the middle of the lower side of the lifting plate.

[0008] Furthermore, the lifting assembly also includes a fixing member that is fixedly connected to the left and right sides of the lower mold. A movable rod is provided in the middle of the fixing member. The lower end of the movable rod passes through the bearing plate and contacts the opposite end of the rocker arm.

[0009] Furthermore, an electric push rod is installed on the front side of the mounting plate, and the drive end of the electric push rod is fixedly connected to the lower side of the ring.

[0010] Furthermore, an L-shaped plate is fixedly connected to the rear end of the bearing plate, a hydraulic rod is fixedly connected to the upper middle part of the L-shaped plate, and an upper mold is fixedly connected to the driving end of the hydraulic rod.

[0011] Furthermore, each of the four corners of the upper mold is fixedly connected with a second limiting rod, the upper end of which penetrates the upper end of the L-shaped plate.

[0012] Furthermore, an injection port is fixedly connected to the right end of the upper mold.

[0013] This utility model has the following beneficial effects:

[0014] 1. In this utility model, a hydraulic rod drives the upper mold to descend, pressing it onto a movable rod, causing it to move downwards and press against a rocker arm. This causes the other end of the rocker arm to rise, driving the lifting plate and piston rod to rise. The top of the rising piston rod is flush with the top of the air outlet, thus blocking the air outlet and facilitating subsequent injection molding. After injection molding, the upper mold rises, and a tension spring pulls the lifting plate and piston rod downwards, causing the top of the piston rod to be lower than the air guide pipe. This activates the air pump, which injects air between the parts and the mold through the air guide pipe and the air outlet, thereby promoting the separation of the parts from the mold and improving demolding efficiency. Attached Figure Description

[0015] Figure 1 This is an overall schematic diagram of the efficient demolding structure of the automotive parts injection mold proposed in this utility model;

[0016] Figure 2 This is a schematic diagram of the ring-shaped structure of the high-efficiency demolding structure of the injection mold for automotive parts proposed in this utility model.

[0017] Figure 3A schematic diagram of a tension spring for a high-efficiency demolding structure of an injection mold for automotive parts proposed in this utility model;

[0018] Figure 4 This is a schematic diagram of the tube body of the high-efficiency demolding structure for the injection mold of automotive parts proposed in this utility model.

[0019] Legend:

[0020] 1. Support plate; 2. Lower mold; 3. Injection groove; 4. U-shaped plate; 5. Ring body; 6. Ejector pin; 7. First limit rod; 8. Housing; 9. Tube body; 10. Air outlet; 11. Air guide pipe; 12. Air pump; 13. Lifting plate; 14. Piston rod; 15. Mounting plate; 16. Electric push rod; 17. Tension spring; 18. Pad plate; 19. Rocker arm; 20. Movable rod; 21. Fixing component; 22. L-shaped plate; 23. Hydraulic rod; 24. Upper mold; 25. Second limit rod; 26. Injection port. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Reference Figure 1 , Figure 2 and Figure 4 This utility model provides an embodiment of an efficient demolding structure for an injection mold of automotive parts, comprising a support plate 1, a lower mold 2 fixedly connected to the middle of the support plate 1, an injection groove 3 provided at the upper end of the lower mold 2, a ring 5 provided on the inner side of the lower mold 2, an ejector pin 6 fixedly connected to the upper side of the ring 5, the upper end of the ejector pin 6 passing through the interior of the lower mold 2, a first limiting rod 7 fixedly connected to the upper side of the ring 5 outside the ejector pin 6, the upper end of the first limiting rod 7 passing through the interior of the lower mold 2, a housing 8 provided on the inner side of the ring 5, an air pump 12 fixedly connected to the middle of the upper end of the housing 8, and an air pump 12 fixedly connected to the outer side of the air pump 12. A vent pipe 11 is connected to the end of the vent pipe 11, and a pipe body 9 is fixedly connected to the end of the vent pipe 11. The lower end of the pipe body 9 passes through the inside of the housing 8, and the upper end of the pipe body 9 passes through the inside of the lower mold 2. An air outlet 10 is provided in the middle of the pipe body 9. A lifting plate 13 is provided on the lower side of the housing 8. A piston rod 14 is fixedly connected to the upper side of the lifting plate 13. The upper end of the piston rod 14 is movably located inside the air outlet 10. A U-shaped plate 4 is fixedly connected to the lower side of the bearing plate 1. A mounting plate 15 is fixedly connected to the middle of the U-shaped plate 4. An electric push rod 16 is installed on the front side of the mounting plate 15. The driving end of the electric push rod 16 is fixedly connected to the lower side of the ring body 5.

[0023] The ring 5 can drive the ejector pin 6 and the first limiting rod 7 to move upward. The upward movement of the ejector pin 6 ejects the parts from the injection tank 3, completing the demolding operation. To address the problem of limited contact area between the parts and the ejector pin 6, which could easily damage the parts during ejection, the air pump 12 is activated simultaneously. Air is injected into the gap between the parts and the lower mold 2 through the air guide pipe 11 and the air outlet 10, promoting separation between the parts and the lower mold 2. This allows the ejector pin 6 to eject the parts with less force, avoiding damage and improving efficiency. To improve the efficiency of part demolding, the lifting plate 13 can drive the piston rod 14 to move up and down inside the vent 10. During injection molding, the lifting plate 13 is pressed tightly against the bottom of the housing 8, and the top of the piston rod 14 blocks the outlet of the vent 10 to prevent injection material from entering the vent 10. When demolding, the piston rod 14 moves downward to connect the air guide pipe 11 with the vent 10 for gas delivery. The electric push rod 16 is used to drive the ring 5, ejector pin 6, and first limit rod 7 to move up and down for demolding. The first limit rod 7 is used to maintain the stability of the ring 5's movement.

[0024] Reference Figure 1 An L-shaped plate 22 is fixedly connected to the rear end of the bearing plate 1. A hydraulic rod 23 is fixedly connected to the upper middle part of the L-shaped plate 22. An upper mold 24 is fixedly connected to the drive end of the hydraulic rod 23. A second limiting rod 25 is fixedly connected to each of the four corners of the upper mold 24. The upper end of the second limiting rod 25 passes through the upper end of the L-shaped plate 22. An injection port 26 is fixedly connected to the right end of the upper mold 24.

[0025] During injection molding, the hydraulic rod 23 is activated, which drives the upper mold 24 to descend. The upper mold 24 covers the top of the lower mold 2, forming a closed space between them to complete the injection molding operation. The material is injected into the space between the upper mold 24 and the U-shaped plate 4 through the injection port 26. After injection molding, the hydraulic rod 23 drives the upper mold 24 to rise, providing space for subsequent demolding. The second limiting rod 25 is used to maintain the stability of the upper mold 24 during lifting and lowering.

[0026] Reference Figures 1-3 A pad 18 is fixedly connected to the upper side of both the left and right ends of the mounting plate 15. A rocker arm 19 is rotatably connected to the upper end of the pad 18. The opposite ends of the rocker arm 19 are in close contact with the lower side of the lifting plate 13. A tension spring 17 is fixedly connected to the middle of the upper side of the mounting plate 15. The upper end of the tension spring 17 is fixedly connected to the middle of the lower side of the lifting plate 13. Fixing members 21 are fixedly connected to the left and right sides of the lower mold 2. A movable rod 20 is provided in the middle of the fixing member 21. The lower end of the movable rod 20 passes through the bearing plate 1 and contacts the opposite end of the rocker arm 19.

[0027] During the descent of the upper mold 24, the upper mold 24 contacts the movable rod 20, causing the movable rod 20 to move downwards. The lower end of the movable rod 20 presses against the end of the rocker arm 19, thereby causing the rocker arm 19 to rotate through the connection with the pad 18, causing its other end to lift up. This, in turn, causes the lifting plate 13 to rise, further stretching the tension spring 17. The rising lifting plate 13 causes the piston rod 14 to rise and retract into the tube body 9, cooperating with the vent 10 to seal the top of the vent 10. After injection molding is completed... The hydraulic rod 23 drives the upper mold 24 to rise. As the upper mold 24 rises, the movable rod 20 is no longer under downward pressure. The stretched tension spring 17 pulls the lifting plate 13 down. The descending lifting plate 13 drives the rocker arm 19 to rotate, lifting the movable rod 20. At the same time, the lifting plate 13 drives the piston rod 14 down, so that its end is lower than the air guide pipe 11. The air pump 12 is activated. The air pump 12 injects air into the gap between the parts and the lower mold 2 through the air guide pipe 11 and the air outlet 10, thereby promoting demolding.

[0028] Working principle: During injection molding, the hydraulic rod 23 is activated, causing the upper mold 24 to descend. The descending upper mold 24 covers the top of the lower mold 2. During the descent of the upper mold 24, it contacts the movable rod 20, causing the movable rod 20 to move downward. The lower end of the movable rod 20 presses against the end of the rocker arm 19, thereby causing the rocker arm 19 to rotate through the connection with the pad 18, causing its other end to lift up. This causes the lifting plate 13 to rise, further stretching the tension spring 17. The rising lifting plate 13 causes the piston rod 14 to rise and retract into the tube body 9, cooperating with the vent 10 to seal the top of the vent 10. Then, through the feeding device connected to the injection port 26, the material flows to the upper mold 24 and the lower mold. Raw material is injected into mold 2 for injection molding. After injection molding is completed, hydraulic rod 23 drives upper mold 24 to rise. As upper mold 24 rises, movable rod 20 is no longer under downward pressure. Tension spring 17 pulls lifting plate 13 to fall. Lifting plate 13 drives rocker arm 19 to rotate, lifting movable rod 20. At the same time, lifting plate 13 drives piston rod 14 to fall, so that its end is lower than air guide pipe 11. Electric push rod 16 is activated to push ring 5 to move upward, thereby driving ejector pin 6 to move upward and ejecting part from lower mold 2. At the same time, air pump 12 is activated. Air pump 12 injects air into the gap between part and lower mold 2 through air guide pipe 11 and air outlet 10, thereby promoting demolding.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-efficiency demolding structure for injection molds of automotive parts, characterized in that, The system includes a support plate (1), a lower mold (2) fixedly connected to the middle of the support plate (1), an injection groove (3) provided at the upper end of the lower mold (2), a ring (5) provided on the inner side of the lower mold (2), an ejector pin (6) fixedly connected to the upper side of the ring (5), the upper end of the ejector pin (6) passing through the interior of the lower mold (2), a first limiting rod (7) fixedly connected to the upper side of the ring (5) outside the ejector pin (6), the upper end of the first limiting rod (7) passing through the interior of the lower mold (2), a housing (8) provided on the inner side of the ring (5), and an air pump fixedly connected to the middle of the upper end of the housing (8). Pump (12), an air guide pipe (11) is fixedly connected to the outside of the air pump (12), a pipe body (9) is fixedly connected to the end of the air guide pipe (11), the lower end of the pipe body (9) passes through the inside of the housing (8), the upper end of the pipe body (9) passes through the inside of the lower mold (2), an air outlet (10) is provided in the middle of the pipe body (9), a lifting plate (13) is provided on the lower side of the housing (8), a piston rod (14) is fixedly connected to the upper side of the lifting plate (13), the upper end of the piston rod (14) is movably arranged inside the air outlet (10), and a lifting assembly is provided on the lower side of the lifting plate (13).

2. The high-efficiency demolding structure for automotive component injection molds according to claim 1, characterized in that: The lifting assembly includes a U-shaped plate (4) fixedly connected to the lower side of the bearing plate (1), an mounting plate (15) fixedly connected to the middle of the U-shaped plate (4), a pad (18) fixedly connected to the upper sides of both the left and right ends of the mounting plate (15), a rocker arm (19) rotatably connected to the upper end of the pad (18), and the opposite ends of the rocker arm (19) are tightly attached to the lower side of the lifting plate (13). A tension spring (17) is fixedly connected to the middle of the upper side of the mounting plate (15), and the upper end of the tension spring (17) is fixedly connected to the middle of the lower side of the lifting plate (13).

3. The high-efficiency demolding structure for automotive component injection molds according to claim 1, characterized in that: The lifting assembly also includes a fixing member (21) fixedly connected to the left and right sides of the lower mold (2). A movable rod (20) is provided in the middle of the fixing member (21). The lower end of the movable rod (20) passes through the bearing plate (1) and contacts the opposite end of the rocker arm (19).

4. The high-efficiency demolding structure for automotive component injection molds according to claim 2, characterized in that: An electric push rod (16) is installed on the front side of the mounting plate (15), and the driving end of the electric push rod (16) is fixedly connected to the lower side of the ring body (5).

5. The high-efficiency demolding structure for automotive component injection molds according to claim 1, characterized in that: The rear end of the bearing plate (1) is fixedly connected to an L-shaped plate (22), and the upper middle part of the L-shaped plate (22) is fixedly connected to a hydraulic rod (23). The driving end of the hydraulic rod (23) is fixedly connected to an upper mold (24).

6. The high-efficiency demolding structure for automotive component injection molds according to claim 5, characterized in that: The upper mold (24) is fixedly connected to four corners with second limiting rods (25), and the upper end of the second limiting rods (25) passes through the upper end of the L-shaped plate (22).

7. The high-efficiency demolding structure for automotive component injection molds according to claim 5, characterized in that: The upper mold (24) is fixedly connected to the right end of the injection port (26).

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