Injection molding device for automobile hubcaps

Abstract

The utility model relates to the technical field of injection molding devices, in particular to an injection molding device for automobile hubcaps, which can cut off the connection between residual materials and the automobile hubcaps, so that the hubcaps adsorbed on a mold are easier to demold, and the demolding efficiency is improved. Comprising a lower die, a lifting rack and an upper die, the lifting rack is installed on the lower die, the upper die is installed on the lifting rack in a lifting mode, and cavities are formed in the opposite faces of the upper die and the lower die; the injection molding machine is mounted at the top of the lifting rack, an extrusion pipeline of the injection molding machine is provided with a heating sleeve, the lower end of the heating sleeve extends into an injection molding runner of the upper mold, a lower port of the runner is communicated with a cavity formed by the upper mold and the lower mold, and the heating sleeve and the runner form a hot runner; a push broach cavity is formed in the upper die, a push broach mechanism is installed in the push broach cavity, a push broach is installed in the push broach cavity in a sliding mode, a cutting edge of the push broach extends into the connecting position of the pouring gate and the cavity, and the pushing mechanism is in transmission connection with the push broach.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding devices, in particular to an injection molding device for automobile hub covers. Background Art

[0002] The automobile wheel hub cover is a decorative plastic cover installed on the outside of the automobile wheel hub, and the automobile wheel hub cover is generally processed by injection molding. In the prior art, a variety of injection molding devices for automobile wheel hub covers are proposed, such as a Chinese utility model patent with application number CN202321314464.0, which proposes an automobile wheel hub cover injection molding mold. The mold drives the rotating block to rotate by the motor-driven worm meshing with the worm gear, so that the rotating block continuously squeezes the linkage plate downward, so that the demoulding top plate is pushed by the telescopic spring to hit the injection molding groove to complete the demoulding, achieving the effect of rapid demoulding after the injection molding is completed, and solving the problem that the automobile wheel hub in the prior art needs to wait for natural demoulding after the injection molding is completed, which is a waste of time.

[0003] However, when demolding, the device impacts and vibrates the lower mold. During general injection molding, the runner and pouring channel of the plastic are located on the upper mold. The plastic in the runner and pouring channel will form a plastic column after the upper mold is cooled. The plastic column is connected to the molded automobile hub cover, causing the automobile hub cover to stick to the cavity of the upper mold and be difficult to demold, resulting in a decrease in the demolding effect of the above-mentioned prior art relying on vibration. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides an automobile hub cover injection molding device which can cut off the connection between the residual material and the automobile hub cover, make the hub cover adsorbed on the mold easier to demould, and improve the demoulding efficiency.

[0005] The utility model discloses an injection molding device for automobile hub covers, comprising a lower mold, a lifting frame and an upper mold, wherein the lifting frame is mounted on the lower mold, the upper mold is lifted and mounted on the lifting frame, and a cavity is arranged on the surfaces opposite to the upper mold and the lower mold; the utility model also comprises an injection molding machine, a push knife and a push knife mechanism, wherein the injection molding machine is mounted on the top of the lifting frame, an extrusion pipeline of the injection molding machine is provided with a heating sleeve, the lower end of the heating sleeve extends into the injection molding runner of the upper mold, the lower port of the runner is communicated with the cavity formed by the upper mold and the lower mold, the heating sleeve and the runner form a hot runner, a push knife chamber is arranged inside the upper mold, a push knife mechanism is installed in the push knife chamber, the push knife is slidably mounted in the push knife chamber, the cutting edge of the push knife extends into the connection between the runner and the cavity, and the push knife mechanism is arranged in the push knife chamber. It is connected to the push knife transmission; when working, the upper mold descends along the lifting frame and snaps onto the lower mold, and the opposite surfaces of the upper mold and the lower mold form a cavity of the automobile hub cover. The injection molding machine heats and melts the raw material and injects it into the cavity through the extrusion tube. After the raw material is cooled and solidified, the upper mold rises along the lifting frame. Since the residual raw material in the runner of the upper mold is solidified and connected to the hub cover, the upper mold has a greater adsorption force on the automobile hub cover than the lower mold, which makes the automobile hub cover easier to stick to the upper mold. At this time, the push knife mechanism pushes the push knife to the connection between the runner and the cavity, so that the blade of the push knife cuts off the residual raw material in the runner and the hub cover, so that the hub cover adsorbed on the upper mold is easier to demould, thereby improving the demoulding efficiency.

[0006] Preferably, the push knife mechanism includes a support rod 1, a support rod 2, a spring, a pressure plate, a pressure rod and a baffle, the lower end of the support rod 1 is rotatably connected to the push knife, the upper end of the support rod 1 is rotatably connected to the upper end of the support rod 2, the lower end of the support rod 2 is rotatably connected to the side wall of the push knife chamber of the upper mold away from the push knife, the two ends of the spring are respectively connected to the push knife and the side wall of the support rod 2 rotatably connected, the pressure plate is lifted and slidably installed in the push knife chamber, the lower end surface of the pressure plate is in contact with the upper ends of the support rod 1 and the support rod 2, the upper end of the pressure rod extends above the upper mold, the pressure rod is located below the baffle, and the baffle is installed The upper die is on the lifting frame; when the upper die is lifted along the lifting frame and separated from the lower die, the pressure rod is blocked by the baffle plate, and the upper die continues to rise, so that the pressure plate blocks the upper ends of the support rods 1 and 2, and presses the support rods 1 and 2 downward, so that the support rods 1 and 2 are unfolded to push the push knife toward the connection between the runner and the cavity, thereby cutting off the connection between the residual material and the automobile hub cover, when the upper die descends along the lifting frame, the pressure rod is separated from the baffle plate, and the elastic force of the spring pulls the push knife into the push knife chamber, so that the push knife, the support rods 1 and 2 are reset. The structure is simple and the push knife effect is good.

[0007] Preferably, the height of the baffle is adjustable; by adjusting the height of the baffle, the height and time of the push knife cutting off the residual material can be adjusted, thereby facilitating the removal of the demoulding hub cover.

[0008] Preferably, it also includes an air inlet pipe and a groove, the lower end of the air inlet pipe extends into the push knife chamber of the upper mold, the lower end surface of the push knife is provided with a groove, one end of the groove is connected with the push knife chamber; the upper end of the air inlet pipe is connected with external high-pressure air, when the push knife cuts off the residual material in the runner, the groove reaches the connection between the runner and the cavity, and the high-pressure air is input into the contact surface between the cavity of the upper mold and the hub cover through the air inlet pipe, the push knife chamber and the groove, thereby blowing the hub cover off and realizing rapid demolding.

[0009] Preferably, it also includes cooling coil 1 and cooling coil 2. Cooling coil 1 is arranged in the lower mold and is located below the cavity of the lower mold. Cooling coil 2 is arranged in the upper mold and is located above the cavity of the upper mold. Both cooling coil 1 and cooling coil 2 are connected to an external cooling water system. After the injection molding of the hub cover in the cavity formed by the upper mold and the lower mold is completed, the cooling water flows into the lower mold and the upper mold through cooling coil 1 and cooling coil 2 respectively, so as to quickly cool the lower mold, the upper mold and the hub cover, thereby improving the molding efficiency.

[0010] Preferably, it also includes two shafts, multiple discs, multiple hammers and a driving assembly, the two shafts are rotatably installed on the lower mold and the upper mold respectively, multiple discs are arranged on each of the two support rods, multiple hammers are rotatably installed on the multiple discs, the outer ends of the multiple hammers are respectively in contact with the lower mold or the upper mold, and the driving assembly is installed on the lifting frame, and the driving assembly drives the two shafts to rotate; when the hub cover is cooled and formed, the driving assembly drives the two shafts to rotate, the two shafts drive the multiple discs to rotate, and the multiple discs respectively drive the multiple hammers to rotate, so that the multiple hammers strike the lower mold and the upper mold to generate vibration, and the vibration causes the hub cover to separate from the cavity of the lower mold and the upper mold, thereby improving the demolding effect.

[0011] Preferably, the driving assembly includes a rotating shaft 1, a transmission assembly 1, a rotating shaft 2, a chain, a transmission assembly 2 and a sprocket 2. The rotating shaft 1 is rotatably mounted on the lower mold, the rotating shaft 1 is transmission-connected to the shaft rod on the lower mold through the transmission assembly 1, the rotating shaft 2 is rotatably mounted on the top of the lifting frame, the rotating shaft 1 and the rotating shaft 2 are both concentrically mounted with a sprocket 1, the chain is sleeved on two sprockets 1, the chain is connected to the upper mold, the chain is rotatably mounted on the upper mold, the sprocket 2 is concentrically mounted on the chain, the sprocket 2 is meshed with the chain for transmission, and the chain is transmission-connected to the shaft rod on the upper mold through the transmission assembly 2; sprocket 2 is set It is meshed with both sides of the chain at the same time and is equipped with corresponding clamping wheels to ensure the transmission stability of the chain and sprocket 2 when the driving torque is small. When the upper mold is lifted and lowered along the lifting frame, the upper mold drives the chain to rotate, and at the same time the chain meshing drives the rotating shaft 1 and sprocket 2 to rotate. The rotating shaft 1 drives the shaft rod on the lower mold to rotate through the transmission component 1, so that the multiple hammers below hit the lower mold. At the same time, the sprocket 2 drives the chain to rotate, and the chain drives the shaft rod on the upper mold to rotate through the transmission component 2, so that the multiple hammers above hit the upper mold. No additional power is required, and the structure is simple and stable.

[0012] Compared with the prior art, the utility model has the following beneficial effects: when working, the upper mold descends along the lifting frame and snaps onto the lower mold, and the relative surfaces of the upper mold and the lower mold form a mold cavity of the automobile hub cover. The injection molding machine heats and melts the raw material and injects it into the mold cavity through the extrusion tube. After the raw material cools and solidifies, the upper mold rises along the lifting frame. Since the residual raw material in the runner of the upper mold is solidified and connected to the hub cover, the upper mold has a greater adsorption force on the automobile hub cover than the lower mold, which makes it easier for the automobile hub cover to stick to the upper mold. At this time, the push knife mechanism pushes the push knife toward the connection between the runner and the mold cavity, so that the blade of the push knife cuts off the residual raw material in the runner from the hub cover, thereby making it easier to demold the hub cover adsorbed on the upper mold, thereby improving the demolding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a front partial cross-sectional structural schematic diagram of the utility model;

[0014] Figure 2 It is a schematic diagram of a partial cross-sectional structure of the utility model in a side view;

[0015] Figure 3 It is a schematic diagram of the axonometric structure of the utility model;

[0016] Figure 4 It is a structural schematic diagram of the push knife and the push knife mechanism;

[0017] Figure 5 It is a schematic diagram of the structure of the upper die, shaft, disc, hammer and drive assembly;

[0018] Figure 6 It is a schematic diagram of the structure of the shaft, disc, hammer and drive assembly.

[0019] Markings in the attached drawings: 1. lower mold; 2. lifting frame; 3. upper mold; 4. injection molding machine; 5. push knife; 6. support rod one; 7. support rod two; 8. spring; 9. pressure plate; 10. pressure rod; 11. baffle; 12. air intake pipe; 13. groove; 14. cooling coil one; 15. cooling coil two; 16. shaft; 17. disc; 18. hammer; 19. rotating shaft one; 20. transmission component one; 21. rotating shaft two; 22. chain; 23. transmission component two; 24. sprocket two. DETAILED DESCRIPTION

[0020] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings. The utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive. Example 1

[0021] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, an injection molding device for automobile hub cover includes a lower mold 1, a lifting frame 2 and an upper mold 3, the lifting frame 2 is installed on the lower mold 1, the upper mold 3 is lifted and installed on the lifting frame 2, and a cavity is arranged on the opposite surface of the upper mold 3 and the lower mold 1; it also includes an injection molding machine 4, a pusher 5 and a pusher mechanism, the injection molding machine 4 is installed on the top of the lifting frame 2, the extrusion pipeline of the injection molding machine 4 is provided with a heating sleeve, the lower end of the heating sleeve extends into the injection molding runner of the upper mold 3, the lower port of the runner is connected with the cavity formed by the upper mold 3 and the lower mold 1, the heating sleeve and the runner form a hot runner, a pusher chamber is arranged inside the upper mold 3, a pusher mechanism is installed in the pusher chamber, the pusher 5 is slidably installed in the pusher chamber, the cutting edge of the pusher 5 extends into the connection between the runner and the cavity, and the pushing mechanism is transmission-connected to the pusher 5; the pusher mechanism includes a support rod 1 6, a support rod 2 7, a spring 8, a pressure plate 9, a pressure Rod 10 and baffle 11, the lower end of support rod 1 6 is rotatably connected to the push knife 5, the upper end of support rod 1 6 is rotatably connected to the upper end of support rod 2 7, the lower end of support rod 2 7 is rotatably connected to the side wall of the push knife chamber of the upper mold 3 away from the push knife 5, the two ends of the spring 8 are respectively connected to the push knife 5 and the side wall of the support rod 2 7 rotatably connected, the pressing plate 9 is lifted and slidably installed in the push knife chamber, the lower end surface of the pressing plate 9 contacts the upper ends of support rod 1 6 and support rod 2 7, the upper end of the pressing rod 10 extends above the upper mold 3, the pressing rod 10 is located below the baffle 11, and the baffle 11 is installed on the lifting frame 2; the height of the baffle 11 is adjustable; it also includes cooling coil 14 and cooling coil 2 15, the lower mold 1 is provided with cooling coil 14, the cooling coil 14 is located below the cavity of the lower mold 1, and the upper mold 3 is provided with cooling coil 2 15, and the cooling coil 2 15 is located above the cavity of the upper mold 3.

[0022] During operation, the upper mold 3 descends along the lifting frame 2 and is buckled onto the lower mold 1. The opposing surfaces of the upper mold 3 and the lower mold 1 form a mold cavity for automobile hub covers. The injection molding machine 4 heats and melts the raw material and injects it into the mold cavity through an extrusion tube. The cooling coil 1 14 and the cooling coil 2 15 are both connected to an external cooling water system. After the hub cover is injected into the mold cavity formed by the upper mold 3 and the lower mold 1, the cooling water flows into the lower mold 1 and the upper mold 3 through the cooling coil 1 14 and the cooling coil 2 15 respectively, and the lower mold 1, the upper mold 3 and the hub cover are quickly cooled. After the raw material is cooled and solidified, the upper mold 3 rises along the lifting frame 2. Since the raw material remaining in the runner of the upper mold 3 is solidified and connected to the hub cover, the upper mold 3 has a stronger adsorption force on the automobile hub cover than the lower mold 1, which makes the automobile hub cover easier to mold. It is easy to stick to the upper mold 3. When the upper mold 3 is lifted along the lifting frame 2 and separated from the lower mold 1, the pressure rod 10 is blocked by the baffle 11, and the upper mold 3 continues to rise, so that the pressure plate 9 blocks the upper ends of the support rod 1 6 and the support rod 2 7, and presses the support rod 1 6 and the support rod 2 7 downward, so that the support rod 1 6 and the support rod 2 7 are unfolded to push the push knife 5 to the connection between the runner and the cavity, thereby cutting off the connection between the residual material and the automobile hub cover, so that the hub cover adsorbed on the upper mold 3 is easier to demold. When the upper mold 3 descends along the lifting frame 2, the pressure rod 10 is separated from the baffle 11, and the elastic force of the spring 8 pulls the push knife 5 into the push knife chamber, so that the push knife 5, the support rod 1 6 and the support rod 2 7 are reset. The height and time of the push knife 5 cutting off the residual material are adjusted by adjusting the height of the baffle 11, thereby facilitating the removal of the demolded hub cover. Example 2

[0023] like Figure 4 As shown, based on Example 1, it also includes an air inlet pipe 12 and a groove 13, the lower end of the air inlet pipe 12 extends into the push knife chamber of the upper mold 3, the groove 13 is set on the lower end surface of the push knife 5, and one end of the groove 13 is connected to the push knife chamber.

[0024] The upper end of the air inlet pipe 12 is connected to the external high-pressure air. When the push knife 5 cuts off the residual material in the runner, the groove 13 reaches the connection between the runner and the cavity. The high-pressure air is input into the contact surface between the cavity of the upper mold 3 and the hub cover through the air inlet pipe 12, the push knife chamber and the groove 13, thereby blowing the hub cover off and realizing rapid demoulding. Example 3

[0025] like Figure 5 and Figure 6As shown, on the basis of embodiment 1, it also includes two shafts 16, multiple discs 17, multiple hammers 18 and a driving assembly, the two shafts 16 are rotatably mounted on the lower mold 1 and the upper mold 3 respectively, multiple discs 17 are arranged on the two support rods 16, multiple hammers 18 are rotatably mounted on the multiple discs 17, the outer ends of the multiple hammers 18 are in contact with the lower mold 1 or the upper mold 3 respectively, the driving assembly is installed on the lifting frame 2, and the driving assembly drives the two shafts 16 to rotate; the driving assembly includes a rotating shaft 19, a transmission assembly 1 20, a rotating shaft 21, a chain 22, and a transmission assembly 23. And sprocket two 24, shaft one 19 is rotatably installed on the lower mold 1, shaft one 19 is connected to the shaft 16 on the lower mold 1 through a transmission component one 20, shaft two 21 is rotatably installed on the top of the lifting frame 2, shaft one 19 and shaft two 21 are concentrically installed with sprocket one, chain 22 is sleeved on two sprocket ones, chain 22 is connected to the upper mold 3, chain 22 is rotatably installed on the upper mold 3, sprocket two 24 is concentrically installed on chain 22, sprocket two 24 is meshed with chain 22 for transmission, and chain 22 is connected to the shaft 16 on the upper mold 3 through a transmission component two 23.

[0026] Sprocket 24 is set to mesh with both sides of chain 22 at the same time, and corresponding clamping wheels are configured to ensure the transmission stability of chain 22 and sprocket 2 24 under the condition of small driving torque. After the hub cover is cooled and finalized, when the upper mold 3 is lifted and lowered along the lifting frame 2, the upper mold 3 drives the chain 22 to rotate, and at the same time, the chain 22 meshes to drive the rotating shaft 19 and sprocket 2 24 to rotate. The rotating shaft 19 drives the shaft rod 16 on the lower mold 1 to rotate through the transmission component 1 20. At the same time, sprocket 24 drives the chain 22 to rotate. The chain 22 drives the shaft rod 16 on the upper mold 3 to rotate through the transmission component 2 23. The two shaft rods 16 drive multiple disks 17 to rotate, and the multiple disks 17 respectively drive multiple hammers 18 to rotate, so that the multiple hammers 18 knock on the lower mold 1 and the upper mold 3 to generate vibration, and the vibration causes the hub cover to separate from the cavity of the lower mold 1 and the upper mold 3.

[0027] like Figures 1 to 6As shown, the utility model is an injection molding device for automobile hub cover. When working, first, the upper mold 3 descends along the lifting frame 2 and is buckled onto the lower mold 1. The opposite surfaces of the upper mold 3 and the lower mold 1 form a mold cavity of the automobile hub cover. The injection molding machine 4 heats and melts the raw material and injects it into the mold cavity through the extrusion tube. The cooling coil 14 and the cooling coil 2 15 transport cooling water to the lower mold 1 and the upper mold 3. After the raw material is cooled and solidified, the upper mold 3 rises along the lifting frame 2, and the upper mold 3 drives the chain 22 to rotate. The chain 22 engages to drive the rotating shaft 19 and the sprocket 2 24 to rotate. The rotating shaft 19 drives the shaft rod 16 on the lower mold 1 to rotate through the transmission component 1 20. At the same time, the sprocket 24 drives the chain 22 to rotate, and the chain 22 drives the shaft rod 16 on the upper mold 3 through the transmission component 23. Rotating the two shafts 16 drives the multiple disks 17 to rotate, and the multiple disks 17 respectively drive the multiple hammers 18 to rotate, so that the multiple hammers 18 knock the lower mold 1 and the upper mold 3 to generate vibrations, and the vibrations cause the hub cover to separate from the cavity of the lower mold 1 and the upper mold 3, and then the pressure rod 10 is blocked by the baffle 11, and the upper mold 3 continues to rise, so that the pressure plate 9 blocks the upper ends of the struts 1 6 and the struts 2 7, and presses the struts 1 6 and the struts 2 7 downward, so that the struts 1 6 and the struts 2 7 are unfolded to push the push knife 5 toward the connection between the runner and the cavity, thereby cutting off the connection between the residual material and the automobile hub cover, and finally high-pressure air is input into the cavity of the upper mold 3 and the contact surface of the hub cover through the air intake pipe 12, the push knife chamber and the groove 13, so that the hub cover is blown down and the hub cover can be taken out.

[0028] The main functions achieved by this utility model are:

[0029] 1. It can cut off the connection between the residual material and the automobile hub cover, making it easier to demould the hub cover adsorbed on the mold and improving the demoulding efficiency;

[0030] 2. It can knock and vibrate the upper and lower molds to speed up demoulding;

[0031] 3. Able to cool the mold and quickly finalize the shape;

[0032] 4. Use high-pressure air to quickly discharge materials.

[0033] The utility model is an automobile hub cover type injection molding device, and its installation method, connection method or setting method are all common mechanical methods, and can be implemented as long as it can achieve its beneficial effects; the utility model is an automobile hub cover type injection molding device. The lower mold 1, the lifting frame 2, the upper mold 3, the injection molding machine 4, the push knife 5, the spring 8, the air intake pipe 12, the cooling coil 14, the cooling coil 2 15, the rotating shaft 19, the transmission component 1 20, the rotating shaft 21, the chain 22, the transmission component 23, and the sprocket 24 are purchased on the market, and the technical personnel in this industry only need to install and operate it according to the accompanying instruction manual, without the need for the technical personnel in this field to pay creative labor.

[0034] All technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0035] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An injection molding device for automobile hub covers, comprising a lower mold (1), a lifting frame (2) and an upper mold (3), wherein the lifting frame (2) is mounted on the lower mold (1), the upper mold (3) is mounted on the lifting frame (2) in a lifting manner, and a cavity is arranged on the opposite surfaces of the upper mold (3) and the lower mold (1); characterized in that: It also includes an injection molding machine (4), a pusher (5) and a pusher mechanism. The injection molding machine (4) is mounted on the top of the lifting frame (2). The extrusion pipeline of the injection molding machine (4) is provided with a heating sleeve. The lower end of the heating sleeve extends into the injection molding runner of the upper mold (3). The lower end of the runner is connected to the cavity formed by the upper mold (3) and the lower mold (1). The heating sleeve and the runner form a hot runner. A pusher chamber is provided inside the upper mold (3). The pusher mechanism is installed in the pusher chamber. The pusher (5) is slidably installed in the pusher chamber. The cutting edge of the pusher (5) extends into the connection between the runner and the cavity. The pushing mechanism is transmission-connected to the pusher (5).

2. An injection molding device for automobile hub covers as claimed in claim 1, characterized in that: The push knife mechanism comprises a support rod 1 (6), a support rod 2 (7), a spring (8), a pressure plate (9), a pressure rod (10) and a baffle (11). The lower end of the support rod 1 (6) is rotatably connected to the push knife (5), the upper end of the support rod 1 (6) is rotatably connected to the upper end of the support rod 2 (7), the lower end of the support rod 2 (7) is rotatably connected to the side wall of the push knife chamber of the upper mold (3) away from the push knife (5), the two ends of the spring (8) are respectively connected to the push knife (5) and the side wall of the support rod 2 (7) rotatably connected, the pressure plate (9) is installed in the push knife chamber in a lifting and sliding manner, the lower end surface of the pressure plate (9) contacts the upper ends of the support rod 1 (6) and the support rod 2 (7), the upper end of the pressure rod (10) extends above the upper mold (3), the pressure rod (10) is located below the baffle (11), and the baffle (11) is installed on the lifting frame (2).

3. An automobile hub cover injection molding device as claimed in claim 2, characterized in that: The baffle (11) is height-adjustable.

4. An injection molding device for automobile hub covers as claimed in claim 2, characterized in that: It also includes an air inlet pipe (12) and a groove (13), wherein the lower end of the air inlet pipe (12) extends into the push knife chamber of the upper mold (3), and the groove (13) is arranged on the lower end surface of the push knife (5), and one end of the groove (13) is connected to the push knife chamber.

5. The automobile hub cover injection molding device according to claim 1, characterized in that: It also includes cooling coil one (14) and cooling coil two (15), wherein cooling coil one (14) is arranged in the lower mold (1), and cooling coil one (14) is located below the mold cavity of the lower mold (1), and cooling coil two (15) is arranged in the upper mold (3), and cooling coil two (15) is located above the mold cavity of the upper mold (3).

6. The automobile hub cover injection molding device according to claim 1, characterized in that: The invention also comprises two shafts (16), a plurality of discs (17), a plurality of hammers (18) and a driving assembly, wherein the two shafts (16) are rotatably mounted on the lower die (1) and the upper die (3), respectively; a plurality of discs (17) are arranged on each of the two support rods (6); a plurality of hammers (18) are rotatably mounted on each of the plurality of discs (17); outer ends of the plurality of hammers (18) are in contact with the lower die (1) or the upper die (3), respectively; and the driving assembly is mounted on the lifting frame (2), and the driving assembly drives the two shafts (16) to rotate.

7. An injection molding device for automobile hub caps as claimed in claim 6, characterized in that: The driving assembly comprises a rotating shaft (19), a transmission assembly (20), a rotating shaft (21), a chain (22), a transmission assembly (23) and a sprocket (24). The rotating shaft (19) is rotatably mounted on the lower mold (1). The rotating shaft (19) is transmission-connected to the shaft rod (16) on the lower mold (1) through the transmission assembly (20). The rotating shaft (21) is rotatably mounted on the top of the lifting frame (2). The rotating shaft (19) and the rotating shaft (21) are both concentrically mounted with a sprocket (1). The chain (22) is sleeved on the two sprockets (1). The chain (22) is connected to the upper mold (3). The chain (22) is rotatably mounted on the upper mold (3). The sprocket (24) is concentrically mounted on the chain (22). The sprocket (24) meshes with the chain (22) for transmission. The chain (22) is transmission-connected to the shaft rod (16) on the upper mold (3) through the transmission assembly (23).

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