Injection molding device for processing of billboards

Abstract

The application provides an injection molding device for billboard processing and relates to the technical field of injection molding. The device comprises a rack, a trimming mechanism arranged in the interior of the rack, a first mold, a support frame fixedly connected to the outer surface of the first mold, a plurality of first limiting sliding grooves and second limiting sliding grooves arranged on the outer surface of the support frame, a first sliding seat and a second sliding seat respectively and slidably connected to the inner surfaces of the first limiting sliding grooves and the second limiting sliding grooves, and a plurality of trimming wheels arranged on the first sliding seat and the second sliding seat. The moving block with the trimming wheels moves to the corners of the hexagonal model, the adjacent limiting frames are adjusted to allow the plurality of trimming wheels to align with the six corners for synchronous trimming, the process ensures the trimming accuracy and consistency through precise mechanical transmission, the trimming action and the mold opening process are synchronously promoted, the trimming process does not need to be started separately after the mold opening is completely finished, the trimming preparation and execution are completed by using the time of the mold opening stage, and the overall processing cycle is shortened.

Description

Technical Field

[0001] This invention relates to the field of injection molding technology, and in particular to an injection molding apparatus for billboard processing. Background Technology

[0002] In the billboard manufacturing industry, hexagonal plastic parts are widely used in commercial advertising, directional signs, and other scenarios due to their aesthetic appeal and strong spatial adaptability. These parts are typically produced using injection molding, a process that involves key steps such as injection curing, mold opening, trimming, cooling and shaping, and demolding. However, existing injection molding equipment still suffers from several technical challenges in practical applications, failing to meet the demands for efficient and high-precision production. Specifically, the trimming of existing hexagonal parts often employs either "manual transfer to trimming equipment after mold opening" or "step-by-step trimming with a single trimming wheel." The former requires manual intervention to ensure seamless process flow, increasing labor costs and making trimming difficult due to mold movement during transfer. Edge reference offset; the latter requires multiple adjustments to the trimming wheel position to complete the chamfering of the six corners, which is not only time-consuming, but also prone to inconsistent trimming dimensions at each corner due to step-by-step operation, resulting in problems such as excessive splicing gaps and irregular appearance, seriously affecting the assembly accuracy and visual effect of the billboard. After the hexagonal parts are injection molded and cured, the model is freed from the mold constraint during the mold opening process. At this time, the model often has a certain degree of plasticity due to incomplete cooling and curing. The existing device lacks a support mechanism that is synchronized with the mold opening action. After the model is opened, it is prone to sidewall damage due to its own weight or slight external vibration. Deformations such as dents and corner warping exist in some devices, which, although equipped with support structures, require additional power for operation. Furthermore, the support position and force are difficult to control precisely, failing to meet the symmetrical structural requirements of hexagonal components. This results in morphological deviations in the supported model, necessitating additional correction during subsequent trimming and assembly, increasing processing costs. Existing injection molding devices often have cooling systems independent of the mold opening and trimming processes, typically only activating cooling after trimming is complete, or relying solely on internal cooling channels within the mold for localized cooling. The former results in the model remaining at a high temperature during trimming, leading to material adhesion and burrs upon contact with the trimming wheels. Additionally, residual heat after trimming is not dissipated promptly, increasing the risk of further deformation. The latter, due to uneven heat dissipation from the hexagonal component's outer wall (faster cooling on the side closer to the mold and slower cooling on the side farther from the mold), causes internal stress within the model, leading to cracking and deformation during subsequent use. This is particularly pronounced for heat-sensitive plastics such as acrylic and PVC, severely impacting the lifespan and appearance stability of billboard components. Therefore, we propose an injection molding device for billboard processing. Summary of the Invention

[0003] The purpose of this invention is to solve the above-mentioned problems by providing an injection molding device for billboard processing.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: an injection molding device for billboard processing, comprising a frame, wherein a trimming mechanism is provided inside the frame, the trimming mechanism comprising a first mold, a support frame fixedly connected to the outer surface of the first mold, a plurality of first limiting grooves and second limiting grooves being formed on the outer surface of the support frame, a first sliding seat and a second sliding seat being slidably connected to the inner surfaces of the plurality of first limiting grooves and second limiting grooves respectively, a limiting frame being fixedly connected to the upper surface of the plurality of first sliding seats, the plurality of limiting frames being slidably connected to the second sliding seats, adjacent limiting frames being slidably connected, a movable frame being fixedly connected to the outer surface of the first sliding seat, a movable block being slidably connected to the inner surface of the movable frame, and an electric trimming wheel being installed on the outer surface of the movable block.

[0005] Preferably, the first mold is fixedly connected to the outer surface of the frame.

[0006] Preferably, the frame is further provided with a control mechanism, which includes a first rotating rod. The inner surface of the movable frame is rotatably connected to a first lead screw via a bearing. The first lead screw is threadedly connected to the movable block. The outer surfaces of the first lead screw and the first rotating rod are both fixedly connected to a first gear, and the two first gears mesh with each other. The upper surface of the second sliding seat is fixedly connected to a second rotating rod. The outer surface of the second rotating rod is fixedly connected to an incomplete gear and a second gear. A limit hole is formed on the outer surface of the second sliding seat. The inner surface of the limit hole is slidably connected to a first rack, which meshes with the incomplete gear. The outer surface of the limit frame is fixedly connected to a second rack, which meshes with the second gear.

[0007] Preferably, a limiting rod is slidably connected to the inner surface of the second sliding seat, and the two ends of the limiting rod are fixedly connected to the first rack. A first spring is fixedly connected between the first rack and the second sliding seat. The first spring is sleeved on the outer surface of the limiting rod, and the first rotating rod is rotatably connected to the limiting frame through a bearing.

[0008] Preferably, the frame is further provided with a support demolding mechanism, which includes a mounting frame. A second mold is fixedly connected to the outer surface of the mounting frame. A support plate is fixedly connected to the outer surface of the second sliding seat. A second lead screw is rotatably connected to the inner surface of the second limiting slide groove via a bearing. The second lead screw is threadedly connected to the second sliding seat. A third gear is fixedly connected to the outer surface of the second lead screw. A third rack is fixedly connected to the outer surface of the mounting frame. The third rack meshes with the third gear. A first threaded post is fixedly connected to the outer surface of the mounting frame. A rotating frame is rotatably connected to the outer surface of the first threaded post via a bearing. A rotating rod is rotatably connected to the outer surface of the rotating frame via a bearing. A second threaded post is fixedly connected to the outer surface of the rotating rod. The first threaded post and the second threaded post mesh with each other.

[0009] Preferably, a slide rod is fixedly connected to the outer surface of the frame, and a connecting frame is fixedly connected to the upper surface of the mounting frame, with the connecting frame slidably connected to the slide rod.

[0010] Preferably, the frame is further provided with a shaping mechanism, which includes a fourth gear, the fourth gear being fixedly connected to the outer surface of the rotating rod, a support cylinder being fixedly connected to the outer surface of the frame, a gear ring being fixedly connected to the inner surface of the support cylinder, the gear ring being meshed with the fourth gear, a fan blade being fixedly connected to the end of the rotating rod, and heat dissipation fins being fixedly connected to the outer surface of the support plate.

[0011] Preferably, a push rod is slidably connected to the inner surfaces of the mounting bracket, the second mold, and the first threaded column, and a baffle is fixedly connected to the outer surface of the push rod.

[0012] Preferably, a second spring is fixedly connected between the baffle and the second threaded post, and the second spring is sleeved on the outer surface of the top rod.

[0013] Preferably, a positioning rod is rotatably connected to the outer surface of the second threaded column via a bearing. A fifth gear is fixedly connected to the outer surface of both the positioning rod and the rotating frame. The two fifth gears are meshed together. A motor is mounted on the outer surface of the first threaded column, and the output end of the motor is fixedly connected to the positioning rod.

[0014] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0015] 1. This invention proposes an injection molding device for billboard processing. During mold opening, the sliding seat drives the rotating rod to move, and the rack moves with the limit frame to drive the gear to rotate, which in turn drives the incomplete gear to rotate. When the incomplete gear meshes with the rack, it pushes the rack to slide and compresses the spring to store energy. After the incomplete gear rotates to the toothless side, the spring releases its elasticity to push the rack to reset. The reset rack drives the rotating rod to rotate, and then drives the lead screw to rotate through gear transmission, causing the moving block with trimming wheels to move towards the corners of the hexagonal model. The adjacent limit frames adjust their positions so that multiple trimming wheels are aligned with the six corners for synchronous trimming. This process ensures trimming accuracy and consistency through precise mechanical transmission. The trimming action is carried out synchronously with the mold opening process, eliminating the need to start the trimming process separately after the mold opening is completely finished. The trimming preparation and execution are completed during the mold opening stage, shortening the overall processing cycle.

[0016] 2. This invention proposes an injection molding device for billboard processing. When the mounting frame moves, the third toothed rack on its outer surface meshes with the third gear of the second lead screw, driving the second lead screw to rotate and causing the second sliding seat to move along the second limiting slide groove towards the hexagonal model, so that the support plate fits against the outer wall of the model. At the same time, the adjacent limiting frame slides in the second sliding seat, realizing the synchronous movement of multiple sliding seats to complete the clamping support. This support design can not only provide support for the model synchronously when the mold is opened, avoiding the model from deforming or falling off due to detachment from the mold, but also provide a reference for subsequent trimming through stable clamping, reducing the vibration generated by the trimming wheel contacting the model, preventing the model from shifting, and ensuring the accuracy and consistency of the hexagonal corner trimming.

[0017] 3. This invention proposes an injection molding device for billboard processing. When the rotating rod rotates with the second threaded column, the fourth gear on its outer surface meshes with the inner gear ring of the support cylinder. Under the circumferential limitation of the gear ring, the rotating rod moves with the second threaded column and rotates, driving the end fan blades to rotate at high speed. The cooling airflow generated by the fan blades blows directly onto the heat dissipation fins outside the support plate. The heat is transferred to the heat dissipation fins through the support plate that is attached to the outer wall of the model and then carried away by the airflow, accelerating the solidification of the model. This process not only allows cooling, mold opening, and trimming to be carried out simultaneously, but also quickly removes residual heat to ensure the stability of the model shape and avoids the problem that the model is still easily deformed due to residual heat after trimming, thus ensuring the shape accuracy of the hexagonal model after solidification. Attached Figure Description

[0018] Figure 1 This invention provides a schematic diagram of the external structure of an injection molding device for billboard processing.

[0019] Figure 2 This invention provides a top view of an injection molding apparatus for billboard processing.

[0020] Figure 3 This invention provides a partial structural schematic diagram of an injection molding device for billboard processing.

[0021] Figure 4 This invention provides a partial structural diagram of a support frame for an injection molding device used in billboard processing.

[0022] Figure 5 This invention provides a partial structural diagram of a support plate for an injection molding device used in billboard processing.

[0023] Figure 6 This invention provides a schematic diagram of a partial structure of an incomplete gear in an injection molding device for billboard processing.

[0024] Figure 7 for Figure 6 A magnified schematic diagram of the structure at point A in the middle.

[0025] Legend: 1. Frame; 2. Trimming mechanism; 201. First mold; 202. Support frame; 203. First limiting slide groove; 204. Second limiting slide groove; 205. First sliding seat; 206. Second sliding seat; 207. Limiting frame; 208. Moving frame; 209. Moving block; 210. Electric trimming wheel; 3. Control mechanism; 301. First rotating rod; 302. First lead screw; 303. First gear; 304. Second rotating rod; 305. Incomplete gear; 306. Second gear; 307. Limiting hole; 308. First rack; 309. Second rack; 4. Support 401. Demolding mechanism; 402. Mounting bracket; 403. Second mold; 404. Support plate; 405. Second lead screw; 406. Third gear; 407. First threaded column; 408. Rotating frame; 409. Rotating rod; 410. Second threaded column; 5. Shaping mechanism; 501. Fourth gear; 502. Support cylinder; 503. Gear ring; 504. Fan blade; 505. Heat dissipation fins; 6. Limiting rod; 7. First spring; 8. Slide rod; 9. Connecting frame; 10. Top rod; 11. Baffle; 12. Second spring; 13. Positioning rod; 14. Fifth gear; 15. Motor. Detailed Implementation

[0026] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0027] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0028] like Figure 1 - Figure 7 As shown, an injection molding device for billboard processing includes a frame 1. A trimming mechanism 2 is installed inside the frame 1. The trimming mechanism 2 includes a first mold 201. A support frame 202 is fixedly connected to the outer surface of the first mold 201. Multiple first limiting grooves 203 and second limiting grooves 204 are formed on the outer surface of the support frame 202. First sliding seats 205 and second sliding seats 206 are slidably connected to the inner surfaces of the multiple first limiting grooves 203 and second limiting grooves 204, respectively. Limiting frames 207 are fixedly connected to the upper surfaces of the multiple first sliding seats 205. The multiple limiting frames 207 are slidably connected to the second sliding seats 206, and adjacent limiting frames 207 are slidably connected. A movable frame 208 is fixedly connected to the outer surface of the first sliding seat 205. A movable block 209 is slidably connected to the inner surface of the movable frame 208. An electric trimming wheel 210 is installed on the outer surface of the movable block 209.

[0029] The effect is that the electric trimming wheel 210 on the moving block 209 moves towards the corner of the hexagonal model, the adjacent limit frame 207 slides and connects, and the multiple limit frames 207 adjust their positions synchronously so that the multiple electric trimming wheels 210 are respectively aligned with the six corners of the hexagon. Under the drive of the moving block 209, the corner chamfering and trimming are completed synchronously to ensure trimming accuracy and consistency.

[0030] like Figure 1 - Figure 7As shown, the first mold 201 is fixedly connected to the outer surface of the frame 1. A control mechanism 3 is also provided inside the frame 1. The control mechanism 3 includes a first rotating rod 301. A first lead screw 302 is rotatably connected to the inner surface of the movable frame 208 via a bearing. The first lead screw 302 is threadedly connected to the movable block 209. First gears 303 are fixedly connected to the outer surfaces of both the first lead screw 302 and the first rotating rod 301, and the two first gears 303 mesh with each other. A second rotating rod 304 is fixedly connected to the upper surface of the second sliding seat 206, and an incomplete gear is fixedly connected to the outer surface of the second rotating rod 304. The second sliding seat 206 has a limiting hole 307 on its outer surface, and a first rack 308 is slidably connected to the inner surface of the limiting hole 307. The first rack 308 meshes with the incomplete gear 305. A second rack 309 is fixedly connected to the outer surface of the limiting seat 207 and meshes with the second gear 306. A limiting rod 6 is slidably connected to the inner surface of the second sliding seat 206, and both ends of the limiting rod 6 are fixedly connected to the first rack 308. A first spring 7 is fixedly connected between the first rack 308 and the second sliding seat 206 and is sleeved on the limiting rod 305. On the outer surface of rod 6, the first rotating rod 301 is rotatably connected to the limiting frame 207 via a bearing. The frame 1 also houses a support demolding mechanism 4, which includes a mounting frame 401. A second mold 402 is fixedly connected to the outer surface of the mounting frame 401. A support plate 403 is fixedly connected to the outer surface of the second sliding seat 206. A second lead screw 404 is rotatably connected to the inner surface of the second limiting slide groove 204 via a bearing. The second lead screw 404 is threadedly connected to the second sliding seat 206. A third gear 405 is fixedly connected to the outer surface of the second lead screw 404. The outer surface of the mounting frame 401 is fixedly connected to... A third rack 406 is provided, which meshes with a third gear 405. A first threaded post 407 is fixedly connected to the outer surface of the mounting frame 401. A rotating frame 408 is rotatably connected to the outer surface of the first threaded post 407 via a bearing. A rotating rod 409 is rotatably connected to the outer surface of the rotating frame 408 via a bearing. A second threaded post 410 is fixedly connected to the outer surface of the rotating rod 409. The first threaded post 407 and the second threaded post 410 mesh with each other. A slide rod 8 is fixedly connected to the outer surface of the frame 1. A connecting frame 9 is fixedly connected to the upper surface of the mounting frame 401. The connecting frame 9 is slidably connected to the slide rod 8.

[0031] The effect is as follows: the first rotating rod 301 is rotatably connected to the limiting frame 207 via a bearing; the first lead screw 302 is threadedly connected to the moving block 209; the electric trimming wheel 210 is in the initial position away from the mold; the second sliding seat 206 is located at the initial end of the second limiting slide groove 204; the support plate 403 is not in contact with the mold; the motor 15 starts, and the output end drives the positioning rod 13 to rotate; the fifth gear 14 on the outer surface of the positioning rod 13 meshes with the fifth gear 14 on the outer surface of the rotating frame 408, thereby driving the rotating frame 408 to rotate around the first threaded column 407; when the rotating frame 408 rotates, it drives the rotating rod 409 and the second threaded column 410; since the second threaded column 410 meshes with the first threaded column 407, the fourth gear 501 meshes with the first threaded column 407. When ring 503 engages, it causes the second threaded post 410 to rotate. The second threaded post 410 rotates around the first threaded post 407 while simultaneously rotating on its own axis. This rotation pushes the first threaded post 407 to move axially, thereby causing the mounting bracket 401 and the second mold 402 to move away from the first mold 201 along the slide bar 8, completing the mold opening. When the mounting bracket 401 moves, its outer surface third rack 406 meshes with the outer surface third gear 405 of the second lead screw 404, driving the second lead screw 404 to rotate within the second limiting slide groove 204. Since the second lead screw 404 is threadedly connected to the second sliding seat 206, the rotation of the second lead screw 404 causes the second sliding seat 206 to move along the second limiting slide groove 204 towards the hexagonal model, ultimately causing the second... The support plate 403 on the sliding seat 206 fits against the outer wall of the hexagonal model and slides inside the second sliding seat 206 through two adjacent limiting frames 207, realizing the synchronous movement of multiple first sliding seats 205 and second sliding seats 206. The support plate 403 clamps and supports the model to prevent deformation or falling off after mold opening. During mold opening, the movement of the second sliding seat 206 drives the second rotating rod 304 to move synchronously. The second rack 309 moves with the limiting frame 207 and drives the second gear 306 to rotate. The rotation of the second gear 306 drives the incomplete gear 305 to rotate through the second rotating rod 304. The incomplete gear 305 on the outer surface of the second rotating rod 304 interacts with the first rack 308. When the incomplete gear 305 rotates, it pushes the first rack 308 to slide along the limiting hole 307, and at the same time compresses the first spring 7 sleeved on the outer surface of the limiting rod 6, so that the first spring 7 is in a stored state. When the incomplete gear 305 rotates to the toothless side, its meshing relationship with the first rack 308 is released, the first spring 7 releases its elastic force, and pushes the first rack 308 to quickly return to its original position. At this time, the first rack 308 meshes with the first gear 303 on the outer surface of the first rotating rod 301, driving the first rotating rod 301 to rotate. When the first rotating rod 301 rotates, it meshes with the first gear 303 on the outer surface of the first lead screw 302 through the first gear 303 on its outer surface, driving the first lead screw 302 to rotate in the moving frame 208.Because the first lead screw 302 is threadedly connected to the moving block 209, the rotation of the first lead screw 302 causes the moving block 209 to slide along the moving frame 208.

[0032] like Figure 1 - Figure 7 As shown, the frame 1 also has a shaping mechanism 5 inside. The shaping mechanism 5 includes a fourth gear 501, which is fixedly connected to the outer surface of the rotating rod 409. A support cylinder 502 is fixedly connected to the outer surface of the frame 1, and a gear ring 503 is fixedly connected to the inner surface of the support cylinder 502. The gear ring 503 meshes with the fourth gear 501. A fan blade 504 is fixedly connected to the end of the rotating rod 409. A heat dissipation fin 505 is fixedly connected to the outer surface of the support plate 403. The mounting frame 401, the second mold 402, and the first threaded column 407 are also included. A top rod 10 is slidably connected to the surface of the top rod 10. A baffle 11 is fixedly connected to the outer surface of the top rod 10. A second spring 12 is fixedly connected between the baffle 11 and the second threaded post 410. The second spring 12 is sleeved on the outer surface of the top rod 10. A positioning rod 13 is rotatably connected to the outer surface of the second threaded post 410 through a bearing. A fifth gear 14 is fixedly connected to the outer surface of both the positioning rod 13 and the rotating frame 408. The two fifth gears 14 are meshed together. A motor 15 is installed on the outer surface of the first threaded post 407. The output end of the motor 15 is fixedly connected to the positioning rod 13.

[0033] The effect is that when the rotating rod 409 and the second threaded column 410 rotate, the fourth gear 501 on its outer surface meshes with the gear ring 503 on the inner surface of the support cylinder 502. The gear ring 503 forms a circumferential limit on the fourth gear 501, causing the rotating rod 409 to rotate while moving with the second threaded column 410. This, in turn, drives the fan blade 504 at the end of the rotating rod 409 to rotate at high speed. The cooling airflow generated by the rotation of the fan blade 504 blows directly onto the heat dissipation fins 505 on the outer surface of the support plate 403. The support plate 403 and the hexagonal model... The outer wall is fitted, and the heat is transferred to the heat dissipation fins 505 through the support plate 403, and then carried away by the cooling airflow, which accelerates the transformation of the hexagonal model from the molten state to the solid state and avoids deformation of the model due to excessive temperature after trimming. After cooling and shaping, the second threaded column 410 continues to rotate, pushing the first threaded column 407 to move further. The frame 1 abuts against the baffle 11. At this time, the baffle 11 and the ejector rod 10 are fixed in position. The first threaded column 407 moves further, and the ejector rod 10 can then push the model out from the position of the second mold 402.

[0034] Working principle: The first mold 201 is fixed to the surface of the frame 1. The second mold 402 is slidably connected to the slide bar 8 of the frame 1 via the mounting bracket 401. The connecting bracket 9 guides along the slide bar 8. In the initial state, the first mold 201 and the second mold 402 are tightly closed to form a hexagonal cavity. After the injection molding machine injects molten plastic into the cavity, it is cooled by the built-in cooling system to solidify it, completing the initial forming of the hexagonal model. At this time, the first rotating rod 301 of the control mechanism 3 is rotatably connected to the limit bracket 207 via a bearing. The first lead screw 302 is threadedly connected to the moving block 209. The electric trimming wheel 210 is in the initial position away from the mold. The second sliding seat 206 is located at the initial end of the second limit slide groove 204. The support plate 403 is not in contact with the mold. When motor 15 starts, its output drives positioning rod 13 to rotate. The fifth gear 14 on the outer surface of positioning rod 13 meshes with the fifth gear 14 on the outer surface of rotating frame 408, thereby driving rotating frame 408 to rotate around first threaded post 407. When rotating frame 408 rotates, it drives rotating rod 409 and second threaded post 410. Since second threaded post 410 meshes with first threaded post 407, and fourth gear 501 meshes with gear ring 503, it will drive second threaded post 410 to rotate. Second threaded post 410 rotates around first threaded post 407 while rotating on its own axis. During this process, it will push first threaded post 407 to move axially, thereby driving mounting frame 401 and second mold 402 away from first mold 201 along slide rod 8, completing mold opening. During movement, the third rack 406 on its outer surface meshes with the third gear 405 on the outer surface of the second lead screw 404, driving the second lead screw 404 to rotate within the second limiting groove 204. Since the second lead screw 404 is threadedly connected to the second sliding seat 206, the rotation of the second lead screw 404 drives the second sliding seat 206 to move along the second limiting groove 204 towards the hexagonal model, ultimately causing the support plate 403 on the second sliding seat 206 to fit against the outer wall of the hexagonal model. Furthermore, through two adjacent limiting frames 207, the second sliding seat 206 slides inside, achieving synchronous movement of multiple first sliding seats 205 and second sliding seats 206. The support plate 403 clamps and supports the model, preventing deformation or falling after mold opening. During mold opening, the second… During the movement of the sliding seat 206, the second rotating rod 304 moves synchronously, the second rack 309 moves with the limit frame 207, and drives the second gear 306 to rotate. The rotation of the second gear 306 drives the incomplete gear 305 to rotate through the second rotating rod 304. The incomplete gear 305 on the outer surface of the second rotating rod 304 meshes with the first rack 308. When the incomplete gear 305 rotates, it pushes the first rack 308 to slide along the limit hole 307, and at the same time compresses the first spring 7 sleeved on the outer surface of the limit rod 6, so that the first spring 7 is in a stored state. When the incomplete gear 305 rotates to the toothless side, its meshing relationship with the first rack 308 is released, the first spring 7 releases its elastic force, and pushes the first rack 308 to quickly return to its original position.At this time, the first rack 308 meshes with the first gear 303 on the outer surface of the first rotating rod 301, driving the first rotating rod 301 to rotate. When the first rotating rod 301 rotates, it meshes with the first gear 303 on the outer surface of the first lead screw 302 through the first gear 303 on its outer surface, driving the first lead screw 302 to rotate within the moving frame 208. Since the first lead screw 302 is threadedly connected to the moving block 209, the rotation of the first lead screw 302 drives the moving block 209 to slide along the moving frame 208, thereby activating the electrical circuit on the moving block 209. The moving trimming wheel 210 moves towards the corners of the hexagonal model, and the adjacent limiting brackets 207 slide together. Multiple limiting brackets 207 adjust their positions synchronously, aligning the multiple electric trimming wheels 210 with the six corners of the hexagon. Driven by the moving block 209, they synchronously complete the corner chamfering and trimming, ensuring trimming accuracy and consistency. When the rotating rod 409 rotates with the second threaded column 410, the fourth gear 501 on its outer surface meshes with the toothed ring 503 on the inner surface of the support cylinder 502. The toothed ring 503 provides circumferential restraint to the fourth gear 501, thus... As the rotating rod 409 moves with the second threaded post 410, it rotates, which in turn drives the fan blade 504 at the end of the rotating rod 409 to rotate at high speed. The cooling airflow generated by the fan blade 504 blows directly onto the heat dissipation fins 505 on the outer surface of the support plate 403. The support plate 403 is in contact with the outer wall of the hexagonal model. Heat is transferred through the support plate 403 to the heat dissipation fins 505 and then carried away by the cooling airflow, accelerating the transformation of the hexagonal model from a molten state to a solid state. This prevents the model from deforming due to excessive temperature after trimming, and the cooling and shaping are completed. Then, the second threaded post 410 continues to rotate, pushing the first threaded post 407 to move further. The frame 1 abuts against the baffle 11. At this time, the baffle 11 and the push rod 10 are fixed in position. The first threaded post 407 moves further, and the push rod 10 can then push the model out from the second mold 402 position. The operator can then remove the processed hexagonal billboard component. The device then resets and enters the next processing cycle. A dust collection hood is provided on the outside of the electric trimming wheel 210, which can collect the trimming impurities through an external air pump.

[0035] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. An injection molding apparatus for billboard processing, comprising a frame (1), characterized in that: The frame (1) is equipped with a trimming mechanism (2), which includes a first mold (201). A support frame (202) is fixedly connected to the outer surface of the first mold (201). The outer surface of the support frame (202) is provided with a plurality of first limiting grooves (203) and second limiting grooves (204). The inner surfaces of the plurality of first limiting grooves (203) and second limiting grooves (204) are respectively slidably connected to a first sliding seat (205) and a second sliding seat (206). The upper surfaces of the plurality of first sliding seats (205) are all fixedly connected to a limiting frame (207). The plurality of limiting frames (207) are slidably connected to the second sliding seats (206). Adjacent limiting frames (207) are connected to each other. The first sliding seat (205) is fixedly connected to a movable frame (208) on its outer surface. A movable block (209) is slidably connected to the inner surface of the movable frame (208). An electric trimming wheel (210) is installed on the outer surface of the movable block (209). The frame (1) is also provided with a support demolding mechanism (4). The support demolding mechanism (4) includes a mounting frame (401). A second mold (402) is fixedly connected to the outer surface of the mounting frame (401). A support plate (403) is fixedly connected to the outer surface of the second sliding seat (206). A second lead screw (404) is rotatably connected to the inner surface of the second limiting slide groove (204) through a bearing. The second lead screw (404) and the second The sliding seat (206) is threadedly connected. A third gear (405) is fixedly connected to the outer surface of the second lead screw (404). A third rack (406) is fixedly connected to the outer surface of the mounting bracket (401). The third rack (406) meshes with the third gear (405). A first threaded post (407) is fixedly connected to the outer surface of the mounting bracket (401). A rotating frame (408) is rotatably connected to the outer surface of the first threaded post (407) via a bearing. A rotating rod (409) is rotatably connected to the outer surface of the rotating frame (408) via a bearing. A second threaded post (410) is fixedly connected to the outer surface of the rotating rod (409). The first threaded post (407) and the second threaded post (410) are connected to each other. The frame (1) is connected to the sliding rod (8) on its outer surface. The mounting frame (401) is connected to the connecting frame (9) on its upper surface. The connecting frame (9) is slidably connected to the sliding rod (8). The frame (1) is also provided with a shaping mechanism (5). The shaping mechanism (5) includes a fourth gear (501). The fourth gear (501) is fixedly connected to the outer surface of the rotating rod (409). The frame (1) is connected to the outer surface of the support cylinder (502). The inner surface of the support cylinder (502) is fixedly connected to the toothed ring (503). The toothed ring (503) is connected to the fourth gear (501) in a meshing connection. The end of the rotating rod (409) is fixedly connected to a fan blade (504).Heat dissipation fins (505) are fixedly connected to the outer surface of the support plate (403).

2. The injection molding apparatus for billboard processing according to claim 1, characterized in that: The first mold (201) is fixedly connected to the outer surface of the frame (1).

3. The injection molding apparatus for billboard processing according to claim 1, characterized in that: The frame (1) is also equipped with a control mechanism (3), which includes a first rotating rod (301). The inner surface of the movable frame (208) is rotatably connected to a first lead screw (302) via a bearing. The first lead screw (302) is threadedly connected to the movable block (209). The outer surfaces of the first lead screw (302) and the outer surfaces of the first rotating rod (301) are both fixedly connected to a first gear (303). The two first gears (303) are meshed together. The upper surface of the second sliding seat (206) is fixedly connected to a second... The rotating rod (304) has an incomplete gear (305) and a second gear (306) fixedly connected to its outer surface. The outer surface of the second sliding seat (206) has a limiting hole (307). The inner surface of the limiting hole (307) is slidably connected to a first rack (308). The first rack (308) meshes with the incomplete gear (305). The outer surface of the limiting frame (207) has a second rack (309) fixedly connected to its outer surface. The second rack (309) meshes with the second gear (306).

4. The injection molding apparatus for billboard processing according to claim 3, characterized in that: The inner surface of the second sliding seat (206) is slidably connected to a limiting rod (6). The two ends of the limiting rod (6) are fixedly connected to the first rack (308). A first spring (7) is fixedly connected between the first rack (308) and the second sliding seat (206). The first spring (7) is sleeved on the outer surface of the limiting rod (6). The first rotating rod (301) is rotatably connected to the limiting frame (207) through a bearing.

5. The injection molding apparatus for billboard processing according to claim 1, characterized in that: The inner surfaces of the mounting bracket (401), the second mold (402) and the first threaded column (407) are slidably connected to a push rod (10), and the outer surface of the push rod (10) is fixedly connected to a baffle (11).

6. The injection molding apparatus for billboard processing according to claim 5, characterized in that: A second spring (12) is fixedly connected between the baffle (11) and the second threaded post (410), and the second spring (12) is sleeved on the outer surface of the top rod (10).

7. The injection molding apparatus for billboard processing according to claim 1, characterized in that: The outer surface of the first threaded column (407) is rotatably connected to a positioning rod (13) via a bearing. The outer surfaces of the positioning rod (13) and the rotating frame (408) are both fixedly connected to a fifth gear (14). The two fifth gears (14) are meshed together. The outer surface of the second threaded column (410) is equipped with a motor (15). The output end of the motor (15) is fixedly connected to the positioning rod (13).

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