Special plastic mold for power supply

Abstract

The utility model relates to the field of plastic molds for electric appliances, in particular to a special plastic mold for a power supply. The special plastic mold for the power supply comprises an injection molding machine body, a fixing plate, a positioning plate, a trapezoidal block, a transmission mechanism, a protective door and a driving assembly, an upper mold plate is installed in the injection molding machine body, a lower mold plate is arranged under the upper mold plate, and a fixing plate used for supporting the lower mold plate is installed in the injection molding machine body. According to the special plastic mould for the power supply, provided by the utility model, through a transmission mechanism of the worm, the worm gear and the cam, an operator only needs to simply rotate the crank to realize quick disassembly and assembly of the mould, and compared with a traditional bolt connection mode, time and physical strength are greatly saved; by means of the cooperation of the trapezoid block and the trapezoid groove and the design of the positioning plate and the oval groove, it is ensured that the lower die plate can be automatically centered and firmly fixed after being replaced, manual adjustment is not needed, and the replacement accuracy and efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the field of electrical plastic molds, and in particular to a plastic mold for power supplies. Background Technology

[0002] Power supplies are widely used in various electronic devices, such as mobile phone chargers and laptop power supplies. Plastic molds are used to manufacture the casings. These casings must not only meet the functional requirements of protecting the internal circuits, but also be aesthetically pleasing, lightweight, and easy to hold. In the production process of power supplies, the selection and replacement of molds are key links in the production process. Different models of power supplies require different molds to ensure the accuracy and quality of the products.

[0003] Traditional mold fixing methods mainly use bolt connections, which have many inconveniences during mold assembly and disassembly. Specifically, operators need to manually tighten or loosen bolts using tools such as wrenches. This process is not only time-consuming and increases the production cycle, but also requires a high level of physical strength from the operator, which can easily lead to operator fatigue.

[0004] Furthermore, after the mold is installed and the injection molding machine starts operating for injection molding, the plastic raw material needs to be melted at high temperature and injected into the mold. During this process, the high temperature of the plastic and the high pressure operating environment of the injection molding machine both pose certain safety risks. To ensure the personal safety of the operator, most existing injection molding machines are equipped with safety doors. However, in actual production, because the operator needs to focus on multiple aspects such as mold changing, raw material addition, and the operation of the injection molding machine, it is easy to become distracted and forget to close the safety door before the injection molding machine starts operating. This negligence may lead to operator injury, thereby affecting production efficiency.

[0005] Therefore, it is necessary to provide a new plastic mold specifically for power supplies to solve the above-mentioned technical problems. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a special plastic mold for power supply.

[0007] The power supply-specific plastic mold provided by this utility model includes: an injection molding machine body, a fixed plate, a positioning plate, trapezoidal blocks, a transmission mechanism, a protective door, and a drive assembly. An upper mold plate is installed inside the injection molding machine body, and a lower mold plate is located directly below the upper mold plate. A fixed plate for supporting the lower mold plate is installed inside the injection molding machine body. Positioning plates are symmetrically arranged at the bottom of the fixed plate, and each positioning plate has an inclined elliptical groove inside. Trapezoidal blocks are installed on the opposite sides of the positioning plates. A transmission mechanism is installed between the injection molding machine body and the positioning plates. The transmission mechanism drives the positioning plates to move and causes the corresponding trapezoidal blocks to be centered and fixed to the lower mold plate. A protective door is symmetrically installed on one side of the injection molding machine body. A drive assembly is installed between the upper mold plate and the protective door. When the upper mold plate moves downwards for processing, it drives the protective door to close to protect the operator's personal safety.

[0008] Preferably, the transmission mechanism includes a connecting rod, a worm, a worm wheel, and a cam. A mounting base is fixedly connected inside the injection molding machine body. A connecting rod is rotatably connected inside the mounting base. A worm is fixedly connected to one end of the connecting rod. A cam is rotatably connected inside the injection molding machine body. A worm wheel is fixedly connected to the outer wall of the top shaft of the cam. The worm wheel and the worm are meshed together. A crank is inserted into the other end of the connecting rod.

[0009] Preferably, the injection molding machine body has symmetrically fixedly connected limit rods inside, and a sliding plate is slidably connected inside the injection molding machine body. The bottom of the sliding plate has symmetrically opened grooves corresponding to the limit rods. The outer wall of the limit rod is slidably connected to the inner wall of the corresponding groove. A stop block is fixedly connected inside the injection molding machine body perpendicular to the limit rods. A spring is fixedly connected to the middle of the stop block. A circular groove is opened inside the sliding plate. One end of the spring is fixedly connected to the inner wall of the circular groove inside the sliding plate.

[0010] Preferably, the top of the skateboard is symmetrically fixedly connected with vertical rods, the top of the skateboard is slidably connected to the bottom of the positioning plate, and the outer wall of the vertical rod is slidably connected to the inner wall of the elliptical groove inside the corresponding positioning plate.

[0011] Preferably, the drive assembly includes: an L-shaped rod, a diagonal rod, and a tension spring. The L-shaped rod is fixedly connected to both sides of the upper template. The diagonal rod is installed on the side of the protective door near the upper template. One end of the L-shaped rod contacts the upper inclined surface of the corresponding diagonal rod. The inner wall of the injection molding machine body adjacent to the protective door is fixedly connected to a tension spring. One end of the tension spring is fixedly connected to the corresponding protective door.

[0012] Preferably, the bottom end of the diagonal bar is rotatably connected to the corresponding protective door, and the top end of the diagonal bar is inserted into the corresponding protective door via a pin.

[0013] Preferably, trapezoidal grooves are provided on both sides of the lower template, and the outer wall of the trapezoidal block fits into the inner wall of the corresponding trapezoidal groove.

[0014] Preferably, the injection molding machine body is internally fixedly connected to a slide rail, the bottom of the protective doors are all slidably connected to the slide rail, and the protective doors are provided with clearance grooves on the side where they are close to each other.

[0015] Compared with related technologies, the special plastic mold for power supplies provided by this utility model has the following advantages:

[0016] Improved the convenience and efficiency of mold replacement.

[0017] Through the transmission mechanism of worm gear, worm wheel and cam, the operator can quickly disassemble and assemble the mold by simply turning the crank. Compared with the traditional bolt connection method, it saves a lot of time and energy. The cooperation of trapezoidal block and trapezoidal groove, as well as the design of positioning plate and elliptical groove, ensures that the lower template can be automatically centered and firmly fixed after replacement without manual adjustment, which improves the accuracy and efficiency of replacement.

[0018] Enhanced operator safety

[0019] When the upper mold plate descends, the interaction between the L-shaped rod and the inclined rod automatically pushes the protective door to close, effectively preventing the operator from being injured by the high temperature plastic and high pressure operating environment during the injection molding process; the automatic closing and opening process of the protective door not only provides physical protection, but also reminds the operator of the operating status of the injection molding machine through visual changes, further enhancing safety awareness;

[0020] The quick mold change and automatic safety door setup simplify the production process, reduce operational complexity, minimize production downtime, and improve overall production efficiency. At the same time, it ensures the personal safety of operators and avoids potential hazards caused by forgetting to close the safety door. Attached Figure Description

[0021] Figure 1 A schematic diagram of the structure of the special plastic mold for the power supply provided by this utility model;

[0022] Figure 2 for Figure 1 The diagram shows a cross-sectional view of the injection molding machine body.

[0023] Figure 3 for Figure 1 The diagram shows the structural schematic of the lower template cross-section;

[0024] Figure 4 for Figure 1 The diagram shows the structure of the transmission mechanism.

[0025] The following are the labels in the diagram: 1. Injection molding machine body; 2. Upper mold plate; 3. Lower mold plate; 4. Fixing plate; 5. Positioning plate; 6. Elliptical groove; 7. Trapezoidal block; 8. Protective door; 9. Connecting rod; 10. Worm gear; 11. Worm wheel; 12. Cam; 13. Crank handle; 14. Limiting rod; 15. Slide plate; 16. Stop block; 17. Spring; 18. Vertical rod; 19. L-shaped rod; 20. Diagonal rod; 21. Tension spring; 22. Trapezoidal groove. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0027] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0028] Please see Figures 1 to 4A special plastic mold for power supplies includes: an injection molding machine body 1, a fixing plate 4, a positioning plate 5, trapezoidal blocks 7, a transmission mechanism, a protective door 8, and a drive assembly. An upper mold plate 2 is installed inside the injection molding machine body 1, and a lower mold plate 3 is located directly below the upper mold plate 2. A fixing plate 4 for supporting the lower mold plate 3 is installed inside the injection molding machine body 1. Positioning plates 5 are symmetrically arranged at the bottom of the fixing plate 4. Inclined elliptical grooves 6 are opened inside each positioning plate 5. Trapezoidal blocks 7 are installed on the opposite sides of the positioning plates 5. A transmission mechanism is installed between the injection molding machine body 1 and the positioning plates 5. The transmission mechanism drives the positioning plates 5 to move and causes the corresponding trapezoidal blocks 7 to be centered and fixed to the lower mold plate 3. A protective door 8 is symmetrically installed on one side of the injection molding machine body 1. A drive assembly is installed between the upper mold plate 2 and the protective door 8. When the upper mold plate 2 moves downwards for processing, it drives the protective door 8 to close to protect the operator's safety. The transmission mechanism includes: a connecting rod 9, a worm gear 10, a worm wheel 11, and a cam 12. The internal fixing connecting rod of the injection molding machine body 1... A mounting base is provided, and a connecting rod 9 is rotatably connected inside the mounting base. One end of the connecting rod 9 is fixedly connected to a worm gear 10. A cam 12 is rotatably connected inside the injection molding machine body 1. A worm wheel 11 is fixedly connected to the outer wall of the top shaft of the cam 12. The worm wheel 11 and the worm gear 10 are meshed together. A crank handle 13 is inserted into the other end of the connecting rod 9. Limiting rods 14 are symmetrically fixedly connected inside the injection molding machine body 1. A sliding plate 15 is slidably connected inside the injection molding machine body 1. The bottom of the sliding plate 15 has symmetrically formed grooves corresponding to the limiting rods 14. The outer wall of the limiting rod 14 is slidably connected to the inner wall of the corresponding groove. The inside of the injection molding machine body 1 is fixedly connected to the limiting rod 14 perpendicularly. A spring 17 is fixedly connected to the middle of the stop 16. A circular groove is opened inside the slide plate 15. One end of the spring 17 is fixedly connected to the inner wall of the circular groove inside the slide plate 15. Vertical rods 18 are symmetrically fixedly connected to the top of the slide plate 15. The top of the slide plate 15 is slidably connected to the bottom end of the positioning plate 5. The outer wall of the vertical rod 18 is slidably connected to the inner wall of the elliptical groove 6 inside the corresponding positioning plate 5.

[0029] It should be noted that: when the lower template 3 is not replaced, the spring 17 inside the slide plate 15 is always in a compressed state. The maximum distance from the center of the cam 12 to the edge of the contour is greater than the maximum distance from the center of the cam 12 to the side of the slide plate 15 away from the stop block 16, ensuring that the cam 12 will not over-rotate when rotating. The worm gear 11 and the worm 10 have a self-locking function to ensure the stability of the cam 12 in fixing the slide plate 15.

[0030] Please see Figure 1 and Figure 2The drive assembly includes: an L-shaped rod 19, a diagonal rod 20, and a tension spring 21. The upper template 2 is fixedly connected to both sides of the L-shaped rod 19. The protective door 8 is installed with a diagonal rod 20 on the side close to the upper template 2. One end of the L-shaped rod 19 contacts the upper inclined surface of the corresponding diagonal rod 20. The inner wall of the injection molding machine body 1 adjacent to the protective door 8 is fixedly connected to a tension spring 21. One end of the tension spring 21 is fixedly connected to the corresponding protective door 8. The bottom end of the diagonal rod 20 is rotatably connected to the corresponding protective door 8. The top end of the diagonal rod 20 is inserted into the corresponding protective door 8 through a pin. The lower template 3 has trapezoidal grooves 22 on both sides. The outer wall of the trapezoidal block 7 fits against the inner wall of the corresponding trapezoidal groove 22. The inside of the injection molding machine body 1 is fixedly connected to a slide rail. The bottom of the protective door 8 is slidably connected to the slide rail. The protective door 8 has a clearance groove on the side close to each other.

[0031] It should be noted that the bottom end of the diagonal rod 20 is rotatably connected to the corresponding protective door 8, and the top end of the diagonal rod 20 is connected to the corresponding protective door 8 by a pin. When a machine malfunction occurs and the upper template 2 and lower template 3 are stuck together, and the protective door 8 needs to be opened for maintenance, the pin at the top end of the diagonal rod 20 can be pulled out to unlock the fixation of the diagonal rod 20. At this time, the protective door 8 can be opened automatically under the tension of the tension spring 21. The protective door 8 has a clearance groove on the side where they are close to each other to ensure that the protective door 8 can be completely closed when the injection molding machine body 1 is running, and will not be unable to be completely closed due to the obstruction of the connecting rod 9.

[0032] The working principle of the special plastic mold for power supply provided by this utility model is as follows:

[0033] Mold replacement and fixing process

[0034] Preparation phase:

[0035] When it is necessary to change the mold to produce different models of power supply housings, first ensure that the injection molding machine body 1 has been completely stopped.

[0036] Unlock positioning plate 5:

[0037] The operator holds the crank handle 13, which is fixedly connected to one end of the connecting rod 9. Turning the crank handle 13 causes the connecting rod 9 to rotate. The other end of the connecting rod 9 is fixedly connected to the worm 10, so the worm 10 also rotates. The worm 10 meshes with the worm wheel 11. The axis of the worm wheel 11 is fixedly connected to the shaft of the cam 12. As the worm 10 rotates, the worm wheel 11 drives the cam 12 to rotate.

[0038] Skateboard 15 moves and positioning board 5 unlocks:

[0039] The rotation of cam 12 unlocks the fixing mechanism of slide plate 15. Under the elastic force of spring 17, slide plate 15 slides along limit rod 14 toward cam 12. As slide plate 15 moves, vertical rod 18 at the top of slide plate 15 slides in the inclined elliptical groove 6 inside positioning plate 5. Due to the inclined design of elliptical groove 6, vertical rod 18 pushes positioning plate 5 during sliding, causing it to move to both sides in a direction perpendicular to limit rod 14.

[0040] Trapezoidal block 7 detaches from and lower template 3 is replaced:

[0041] The movement of the positioning plate 5 causes the trapezoidal block 7 to move to both sides, so that it is disengaged from the trapezoidal grooves 22 on both sides of the lower template 3. At this time, the operator can safely remove the old lower template 3 and place the new lower template 3 in the middle of the top of the fixing plate 4.

[0042] Re-fix template 3:

[0043] Reverse rotation of crank 13 drives worm 10 to rotate in the opposite direction via connecting rod 9. The reverse rotation of worm 10 causes worm wheel 11 and cam 12 to rotate in the opposite direction. The reverse rotation of cam 12 pushes slide plate 15 to move in the opposite direction and compresses spring 17. The movement of slide plate 15, through the sliding of vertical rod 18 in elliptical groove 6, pushes positioning plate 5 towards the center. The movement of positioning plate 5 causes trapezoidal block 7 to converge towards the center. When trapezoidal block 7 is driven by positioning plate 5 to move into the trapezoidal grooves on both sides of lower template 3, its outer wall gradually contacts the inner wall of the groove. Due to the characteristics of trapezoidal geometry, if lower template 3 is not perfectly centered, one side of the inner wall of trapezoidal groove 22... The lower template 3 will first contact one side of the outer wall of the trapezoidal block 7 and be pushed by the trapezoidal block 7. This pushing force will cause the lower template 3 to automatically adjust its position so as to fit more smoothly with the outer wall of the trapezoidal block 7. As the trapezoidal block 7 is further inserted, the contact area between its outer wall and the inner wall of the groove will gradually increase, thereby further enhancing the centering positioning effect. Once the trapezoidal block 7 is fully inserted into the trapezoidal groove, the tight fit between its outer wall and the inner wall of the groove will provide additional stability. This stability helps to prevent the trapezoidal block 7 from shifting or loosening when subjected to external forces. At this time, the lower template 3 is replaced and is firmly fixed in the center position on the fixing plate 4.

[0044] Injection molding process and automatic closing of protective door 8

[0045] Start the injection molding machine:

[0046] After the mold is changed, the injection molding machine body 1 is started. The hydraulic system inside the injection molding machine drives the upper mold plate 2 to move downward and fit with the lower mold plate 3. After the upper mold plate 2 and the lower mold plate 3 fit together, the injection molding machine begins to inject molten plastic material.

[0047] Safety door 8 closes automatically:

[0048] As the upper template 2 descends, the L-shaped rods 19 on both sides also descend. One end of the L-shaped rod 19 contacts the upper inclined surface of the inclined rod 20 on one side of the protective door 8. As the L-shaped rod 19 continues to descend, it presses against the upper inclined surface of the inclined rod 20, causing the protective door 8 to press against the slide rail and move towards the middle of the injection molding machine body 1. The movement of the protective door 8 stretches the tension spring 21 at its bottom. After the upper template 2 and the lower template 3 are in contact, the protective door 8 is completely closed. The closing of the protective door 8 ensures the safety of the operator during the operation of the injection molding machine body 1.

[0049] Injection molding completed and protective door 8 opened:

[0050] After injection molding is completed, the upper mold plate 2 moves upward under the action of the hydraulic system. As the upper mold plate 2 rises, the protective door 8 begins to move to both sides under the pulling force of the tension spring 21 and the rising of the L-shaped rod 19 until it returns to its initial state. At this time, the workers can take out the workpiece in the mold and prepare for the next injection molding operation.

[0051] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A plastic mold specifically for power supplies, characterized in that, include: The injection molding machine body (1) has an upper template (2) installed inside it, and a lower template (3) is located directly below the upper template (2). The fixing plate (4) is installed inside the injection molding machine body (1) to support the lower template (3); Positioning plate (5) is symmetrically provided at the bottom of the fixing plate (4), and inclined elliptical grooves (6) are provided inside the positioning plate (5). Trapezoidal blocks (7) and positioning plates (5) are each installed on the side that is far apart from each other. A transmission mechanism is installed between the injection molding machine body (1) and the positioning plate (5). The transmission mechanism drives the positioning plate (5) to move and drives the corresponding trapezoidal block (7) to fix the lower template (3) in the center. Protective door (8) is symmetrically installed on one side of the injection molding machine body (1). A drive assembly is installed between the upper template (2) and the protective door (8). When the upper template (2) moves downward for processing, the drive assembly drives the protective door (8) to close to protect the operator's personal safety.

2. The plastic mold for a power supply unit according to claim 1, characterized in that, The transmission mechanism includes a connecting rod (9), a worm (10), a worm wheel (11), and a cam (12). The injection molding machine body (1) is fixedly connected to a mounting base. The mounting base is rotatably connected to the connecting rod (9). One end of the connecting rod (9) is fixedly connected to the worm (10). The injection molding machine body (1) is rotatably connected to the cam (12). The top shaft of the cam (12) is fixedly connected to the outer wall of the worm wheel (11). The worm wheel (11) and the worm (10) are meshed. The other end of the connecting rod (9) is inserted with a crank handle (13).

3. The plastic mold for a power supply unit according to claim 2, characterized in that, The injection molding machine body (1) is symmetrically fixedly connected to a limit rod (14). The injection molding machine body (1) is slidably connected to a slide plate (15). The bottom of the slide plate (15) is symmetrically provided with grooves corresponding to the limit rod (14). The outer wall of the limit rod (14) is slidably connected to the inner wall of the corresponding groove. The injection molding machine body (1) is fixedly connected to a stop block (16) perpendicular to the limit rod (14). The middle part of the stop block (16) is fixedly connected to a spring (17). The slide plate (15) is provided with a circular groove. One end of the spring (17) is fixedly connected to the inner wall of the circular groove inside the slide plate (15).

4. The plastic mold for a power supply according to claim 3, characterized in that, The top of the slide plate (15) is symmetrically fixed with vertical rods (18), the top of the slide plate (15) is slidably connected to the bottom of the positioning plate (5), and the outer wall of the vertical rod (18) is slidably connected to the inner wall of the elliptical groove (6) inside the corresponding positioning plate (5).

5. The plastic mold for a power supply according to claim 1, characterized in that, The drive assembly includes an L-shaped rod (19), a diagonal rod (20), and a tension spring (21). The upper template (2) is fixedly connected to both sides of the L-shaped rod (19). The protective door (8) is installed with a diagonal rod (20) on the side near the upper template (2). One end of the L-shaped rod (19) contacts the upper inclined surface of the corresponding diagonal rod (20). The inner wall of the injection molding machine body (1) adjacent to the protective door (8) is fixedly connected with a tension spring (21). One end of the tension spring (21) is fixedly connected to the corresponding protective door (8).

6. The plastic mold for a power supply according to claim 5, characterized in that, The bottom end of the diagonal bar (20) is rotatably connected to the corresponding protective door (8), and the top end of the diagonal bar (20) is connected to the corresponding protective door (8) by a pin.

7. The plastic mold for a power supply according to claim 1, characterized in that, Trapezoidal grooves (22) are provided on both sides of the lower template (3), and the outer wall of the trapezoidal block (7) fits against the inner wall of the corresponding trapezoidal groove (22).

8. The plastic mold for a power supply according to claim 1, characterized in that, The injection molding machine body (1) is internally fixedly connected with a slide rail, and the bottom of the protective door (8) is slidably connected to the slide rail. The protective door (8) is provided with a clearance groove on the side that is close to each other.

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