A plastic shell injection mold

Abstract

The utility model relates to a kind of plastic shell injection mould, fixed mould component includes fixed mould plate, fixed mould seat and fixed mould ren, fixed mould plate is fixedly connected with fixed mould seat, fixed mould ren is installed in fixed mould seat and is provided with cavity, side forming insert is movably equipped on fixed mould seat, side forming insert one end extends into cavity, and other end is connected with cylinder transmission;Movable mould component includes movable mould plate, movable mould seat and movable mould ren, movable mould seat is installed on movable mould plate, movable mould ren is installed in movable mould seat and is provided with the core corresponding with cavity, sliding block is slidably equipped on movable mould seat, first spring is arranged between sliding block and movable mould ren, fixed mould seat is provided with inclined guide pillar, inclined hole, which is matched with inclined guide pillar, is formed in sliding block, sliding block insert is arranged on sliding block, and sliding block insert one end extends into core, by using the double-drive cooperative structure of cylinder driving side forming insert and inclined guide pillar driving sliding block insert, the deficiency of existing single driving side core-pulling mechanism can be made up, and the synchronism and positioning accuracy of complex lateral structure forming are effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to a plastic shell injection mold. Background Technology

[0002] Injection molds are core equipment in the field of plastic product molding and processing. Their working principle involves injecting molten plastic raw material into the closed cavity of the mold. After the plastic raw material cools and solidifies, the molded plastic product is removed through mold opening and closing actions and a demolding mechanism, thus achieving mass production and precision manufacturing of plastic products. With advantages such as high molding efficiency, good product dimensional consistency, and a wide range of applicable raw materials, injection molds are widely used in many industries, including electronics, home appliances, automobiles, and medical devices, and are indispensable in the production of various plastic housings (such as electronic device housings, home appliance component housings, and automotive interior housings). As the market's demands for the functionality and appearance of plastic housings continue to increase, more and more plastic housings are integrating complex lateral irregular structures in their structural design, such as lateral grooves, lateral bosses, and lateral through holes. The existence of these complex lateral structures means that plastic housings cannot be molded using traditional straight-up-down mold opening and demolding methods; instead, they must rely on a side core-pulling mechanism within the mold to achieve lateral molding and demolding.

[0003] Currently, for molding complex lateral structures of plastic shells, existing injection molds employ two main methods: one relies on the cooperation of inclined guide pillars and sliders, converting the linear motion of mold closing and opening into the lateral sliding of the slider to achieve the side core-pulling action; the other uses a cylinder to directly drive the side core-pulling component to complete the extension and retraction action. However, the aforementioned single-drive side core-pulling mechanisms have significant shortcomings in practical applications: for plastic shells with complex lateral structures, a single inclined guide pillar drive cannot guarantee the synchronization and positioning accuracy of multiple side core-pulling actions, easily leading to defects such as lateral structural dimensional deviations and surface scratches in the product; a single cylinder drive suffers from unstable power transmission, low accuracy in core-pulling stroke control, and difficulty in achieving precise coordination with mold opening and closing actions, increasing the complexity of mold control. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a plastic shell injection mold.

[0005] The objective of this utility model can be achieved through the following technical solution: A plastic shell injection mold includes a fixed mold assembly and a moving mold assembly. The fixed mold assembly includes a fixed template, a fixed mold base, and a fixed mold core. The fixed template is fixedly connected to the fixed mold base. The fixed mold core is installed on the fixed mold base and has a cavity. A side forming insert is movably installed on the fixed mold base. One end of the side forming insert extends into the cavity, and the other end is connected to a cylinder for transmission. The moving mold assembly includes a moving template, a moving mold base, and a moving mold core. The moving mold base is installed on the moving template. The moving mold core is installed on the moving mold base and has a core corresponding to the cavity. A slider is slidably installed on the moving mold base. A first spring is provided between the slider and the moving mold core. The fixed mold base has an inclined guide post. The slider has an inclined hole adapted to the inclined guide post. A slider insert is provided on the slider, and one end of the slider insert extends into the core.

[0006] Preferably, the fixed mold base is provided with an inclined block, which slides in conjunction with the slider.

[0007] Preferably, the moving mold base is provided with a first guide post, and the fixed mold base is provided with a guide hole adapted to the first guide post, and the first guide post and the guide hole are slidably engaged.

[0008] Preferably, a second guide post is provided between the moving mold plate and the moving mold base, and an ejector pin mounting plate is slidably provided on the second guide post. An ejector pin is provided on the ejector pin mounting plate and extends into the core. An ejector pin fixing plate is provided on one side of the ejector pin mounting plate. The ejector pin fixing plate and the ejector pin mounting plate cooperate to clamp and fix the ejector pin. A second spring is provided between the ejector pin mounting plate and the moving mold base.

[0009] Preferably, the cavity is provided with a cavity insert, and the core is provided with a core insert corresponding to the cavity insert.

[0010] Preferably, both the fixed mold base and the moving mold base are provided with cooling water interfaces, and both the fixed mold core and the moving mold core are provided with cooling water channels that communicate with the cooling water interfaces.

[0011] The beneficial effects of this utility model are: by adopting a dual-drive collaborative structure of cylinder-driven side molding insert and inclined guide post-driven slider insert, the shortcomings of the existing single-drive side core-pulling mechanism can be made up for, effectively improving the synchronization and positioning accuracy of complex lateral structure molding, and reducing defects such as product size deviation and surface scratches; the first spring ensures accurate slider reset, assists in precise coordination with mold opening and closing actions, and reduces mold control complexity. Attached Figure Description

[0012] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of a plastic shell injection mold according to the present invention.

[0014] Figure 2 This is a cross-sectional view of a plastic shell injection mold according to the present invention.

[0015] Figure 3 This is another cross-sectional view of a plastic shell injection mold according to the present invention.

[0016] Figure 4 This is a schematic diagram of the fixed mold assembly structure of a plastic shell injection mold according to the present invention.

[0017] Figure 5 This is a schematic diagram of the moving mold assembly structure of a plastic shell injection mold according to the present invention.

[0018] Figure 6 for Figure 5 A partial schematic diagram of point A in the middle.

[0019] The labels in the diagram represent: 1. Fixed mold assembly; 2. Moving mold assembly; 3. Fixed mold plate; 4. Fixed mold base; 5. Fixed mold core; 6. Cavity; 7. Side forming insert; 8. Cylinder; 9. Moving mold plate; 10. Moving mold base; 11. Moving mold core; 12. Core; 13. Slider; 14. First spring; 15. Angled guide post; 16. Angled hole; 17. Slider insert; 18. Angled block; 19. First guide post; 20. Guide hole; 21. Second guide post; 22. Ejector mounting plate; 23. Ejector pin; 24. Ejector pin fixing plate; 25. Second spring; 26. Cavity insert; 27. Core insert; 28. Cooling water interface; 29. ​​Cooling water channel. Detailed Implementation

[0020] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0021] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] See Figures 1 to 6As shown, the structure of this utility model is as follows: a plastic shell injection mold, including a fixed mold assembly 1 and a moving mold assembly 2. The fixed mold assembly 1 includes a fixed mold plate 3, a fixed mold base 4, and a fixed mold core 5. The fixed mold plate 3 is fixedly connected to the fixed mold base 4. The fixed mold core 5 is installed on the fixed mold base 4 and has a cavity 6. A side forming insert 7 is movably installed on the fixed mold base 4. One end of the side forming insert 7 extends into the cavity 6, and the other end is connected to a cylinder 8 for transmission. The moving mold assembly 2 includes a moving mold plate 9, a moving mold base 10, and a moving mold core 11. The moving mold base 10 is installed on the moving mold plate 9, and the moving mold core 11 is installed on the moving mold base 9. The moving mold base 10 is equipped with a core 12 corresponding to the cavity 6. A slider 13 is slidably mounted on the moving mold base 10. A first spring 14 is provided between the slider 13 and the moving mold core 11. The fixed mold base 4 is equipped with an inclined guide post 15. The slider 13 has an inclined hole 16 adapted to the inclined guide post 15. A slider insert 17 is provided on the slider 13. One end of the slider insert 17 extends into the core 12. Specifically, the fixed mold plate 3 provides a stable mounting base for the fixed mold assembly 1, which can transfer the overall load of the fixed mold side to the fixed mold fixing plate of the injection molding machine, ensuring the stability of the fixed mold assembly 1 during the injection molding process. The fixed mold assembly 1 is also equipped with a sprue sleeve. A main runner is formed inside the sprue sleeve. The main runner is connected to the branch runner in the fixed mold core 5. The end of the branch runner is connected to the sprue and connected to the cavity 6. After the molten plastic enters through the main runner, it is divided through the branch runner and finally precisely injected into the cavity 6 through the sprue, realizing the stable delivery and distribution of the molding material. The cavity 6 of the fixed mold core 5 is the core foundation for the outer shape forming of the plastic shell, providing filling space for the molten plastic. The side forming insert 7 can extend into the cavity 6 to form the irregular side structure of the shell. The cylinder 8 can drive the side forming insert 7 to achieve telescopic movement, ensuring the accurate forming and smooth release of the side forming structure. The moving mold plate 9 drives the moving mold assembly 2 to complete the mold opening and closing action. The core 12 of the moving mold core 11 corresponds to and cooperates with the cavity 6 of the fixed mold core 5 to form a complete forming space for the plastic shell, ensuring the forming accuracy of the internal contour of the shell. The slider 13 can slide smoothly along the moving mold base 10. The cooperation of the inclined guide post 15 and the inclined hole 16 can convert the mold closing action into the lateral sliding power of the slider 13, driving the slider insert 17 to extend into the core 12 to realize the forming of the side structure of the other side of the shell. The first spring 14 can provide the reset power for the slider 13 when the mold is opened, ensuring that the slider 13 and the slider insert 17 return to the initial position accurately, preparing for the next mold closing and forming. Throughout the molding process, the side molding insert 7 and the slider insert 17 work together to adapt to the molding requirements of complex lateral structures of the shell. The cylinder 8 and the inclined guide post 15 provide power to the side molding insert 7 and the slider insert 17 respectively, realizing the orderly connection between lateral molding and demolding actions.

[0024] like Figure 2 , Figure 3 , Figure 4As shown, the fixed mold base 4 is provided with a slant block 18, which slides in conjunction with the slider 13. Specifically, the function of the slant block 18 is the same as that of the slant guide post 15. Its sliding contact with the slider 13 can convert the mold closing action into the lateral sliding power of the slider 13, providing driving force for the sliding of the slider 13. This ensures that the slider 13 drives the slider insert 17 to accurately extend into the core 12, ensuring the positional accuracy of the side structure forming of the shell. At the same time, it makes the movement of the slider 13 more stable and reduces the phenomenon of slant or jamming during the sliding process.

[0025] like Figure 2 , Figure 3 , Figure 4 As shown, the moving mold base 10 is provided with a first guide post 19, and the fixed mold base 4 is provided with a guide hole 20 adapted to the first guide post 19. The first guide post 19 and the guide hole 20 are slidably engaged. Specifically, the sliding engagement between the first guide post 19 and the guide hole 20 on the fixed mold base 4 can achieve precise alignment between the fixed mold assembly 1 and the moving mold assembly 2 during the mold opening and closing process, avoid misalignment between the fixed mold core 5 and the moving mold core 11 during mold closing, and ensure the integrity of the molding space formed by the cavity 6 and the core 12.

[0026] like Figure 4 , Figure 5 As shown, a second guide post 21 is provided between the moving template 9 and the moving mold base 10. An ejector pin mounting plate 22 is slidably mounted on the second guide post 21. An ejector pin 23 extending into the core 12 is provided on the ejector pin mounting plate 22. An ejector pin fixing plate 24 is provided on one side of the ejector pin mounting plate 22. The ejector pin fixing plate 24 cooperates with the ejector pin mounting plate 22 to clamp and fix the ejector pin 23. A second spring 25 is provided between the ejector pin mounting plate 22 and the moving mold base 10. Specifically, a support plate is symmetrically arranged on the moving template 9. The moving mold base 10 is fixedly mounted on the support plate. The function of the support plate is to raise the height of the moving mold base and reserve space for the sliding of the ejector pin mounting plate 22 and the ejector pin fixing plate 24. The second guide post 21 provides precise guidance for the movement of the ejector pin mounting plate 22, ensuring that the ejector pin mounting plate 22 drives the ejector pin 23 to make a smooth linear movement and avoiding the ejector pin 23 from tilting, bending or jamming. The engagement of the ejector pin fixing plate 24 and the ejector pin mounting plate 22 securely clamps the ejector pin 23, ensuring that the ejector pin 23 does not shift during ejection and guaranteeing stable ejection force transmission from the ejector pin 23 to the plastic housing. The ejector pin 23 can directly act on the plastic housing within the core 12, ejecting the molded housing from the core 12 to complete demolding. The second spring 25 provides reset power to the ejector pin mounting plate 22 after the ejection action is completed, causing the ejector pin 23 to automatically return to its initial position.

[0027] like Figure 3 , Figure 4 , Figure 6As shown, cavity 6 is provided with cavity insert 26, and core 12 is provided with core insert 27 corresponding to cavity insert 26. Specifically, cavity insert 26 and core insert 27 are adapted to cavity 6 and core 12 respectively, which can be used to specifically mold complex local structures of plastic shell, reducing the difficulty and cost of overall machining of fixed mold core 5 and moving mold core 11. When the local structure of plastic shell needs to be adjusted, or when the insert is worn or damaged, cavity insert 26 or core insert 27 can be replaced directly without replacing the entire fixed mold core 5 and moving mold core 11, thus shortening the mold maintenance and adjustment cycle.

[0028] like Figures 1 to 3 As shown, both the fixed mold base 4 and the moving mold base 10 are equipped with cooling water inlets 28, and both the fixed mold core 5 and the moving mold core 11 are equipped with cooling water channels 29 that communicate with the cooling water inlets 28. Specifically, the cooling water inlets 28 can connect to an external cooling system, allowing cooling water to smoothly enter the cooling water channels 29 in the fixed mold core 5 and the moving mold core 11. The cooling water in the cooling water channels 29 can quickly remove the heat released by the molten plastic during the molding process, accelerate the solidification of the plastic, shorten the molding cycle, and improve production efficiency. At the same time, the evenly distributed cooling water channels 29 can ensure that the cooling rate of each part of the plastic shell is consistent, reducing defects such as shell shrinkage deformation and residual internal stress caused by uneven cooling, and ensuring the stability of shell dimensional accuracy and appearance quality.

[0029] In practical use, during the mold closing stage, the moving mold plate 9 drives the moving mold assembly 2 to move towards the fixed mold assembly 1. The inclined guide post 15 on the fixed mold base 4 gradually inserts into the inclined hole 16 of the slider 13. Through the cooperation of the inclined guide post 15 and the inclined surface of the inclined hole 16, the slider 13 is driven to slide along the moving mold base 10 towards the core 12, and the slider insert 17 is simultaneously driven to extend into the core 12. At the same time, the cylinder 8 drives the side molding insert 7 to extend out and into the cavity 6. At this time, the slider insert 17 and the side molding insert 7 cooperate with each other, and the core 12 of the moving mold core 11 and the cavity 6 of the fixed mold core 5 are precisely connected to form a closed molding space. The fixed mold plate 3 provides stable support for the entire fixed mold assembly 1 through the connection with the fixed mold fixing plate of the injection molding machine, ensuring the mold closing positioning accuracy. During the injection molding stage, molten plastic enters through the main runner inside the sprue bushing of the fixed mold assembly 1. The material is then diverted through the connection between the main runner and the branch runner inside the fixed mold core 5, and finally precisely injected into the closed cavity 6 through the sprue at the end of the branch runner, completing the stable delivery and filling of the molded material. During the mold opening stage, the moving mold plate 9 drives the moving mold assembly 2 to move in the opposite direction. The cylinder 8 first drives the side molding insert 7 to retract, disengaging it from the side molding structure inside the cavity 6. As the moving mold assembly 2 continues to move, the inclined guide post 15 gradually disengages from the inclined hole 16 of the slider 13. Under the elastic force of the first spring 14, the slider 13 slides and resets along the moving mold base 10 in a direction away from the core 12, simultaneously driving the slider insert 17 to disengage from the side molding structure inside the core 12, until the moving mold assembly 2 and the fixed mold assembly 1 are completely separated, preparing for the subsequent ejection of the plastic part. Throughout the process, the orderly coordination of each component achieves precise molding and smooth demolding of the complex side-structured plastic shell.

[0030] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the substance and scope of the present invention. Various modifications made by those skilled in the art to the above embodiments after reading this specification are all within the scope of protection of the present invention.

Claims

1. A plastic housing injection mold, characterized in that: The assembly includes a fixed mold assembly (1) and a moving mold assembly (2). The fixed mold assembly (1) includes a fixed template (3), a fixed mold base (4), and a fixed mold core (5). The fixed template (3) is fixedly connected to the fixed mold base (4). The fixed mold core (5) is mounted on the fixed mold base (4) and has a cavity (6). A side forming insert (7) is movably mounted on the fixed mold base (4). One end of the side forming insert (7) extends into the cavity (6), and the other end is connected to a cylinder (8) for transmission. The moving mold assembly (2) includes a moving template (9), a moving mold base (10), and a moving mold core (11). The moving mold base (10) is installed on the moving mold plate (9), the moving mold core (11) is installed on the moving mold base (10) and has a core (12) corresponding to the cavity (6), the moving mold base (10) is slidably provided with a slider (13), the slider (13) and the moving mold core (11) are provided with a first spring (14), the fixed mold base (4) is provided with an inclined guide post (15), the slider (13) is provided with an inclined hole (16) adapted to the inclined guide post (15), the slider (13) is provided with a slider insert (17), one end of the slider insert (17) extends into the core (12).

2. The plastic housing injection mold according to claim 1, characterized in that: The fixed mold base (4) is provided with an inclined block (18), which slides in conjunction with the slider (13).

3. The plastic housing injection mold according to claim 1, characterized in that: The moving mold base (10) is provided with a first guide post (19), and the fixed mold base (4) is provided with a guide hole (20) adapted to the first guide post (19). The first guide post (19) and the guide hole (20) are slidably engaged.

4. The plastic housing injection mold according to claim 1, characterized in that: A second guide post (21) is provided between the moving template (9) and the moving mold base (10). A pin mounting plate (22) is slidably provided on the second guide post (21). A pin (23) extending into the core (12) is provided on the pin mounting plate (22). A pin fixing plate (24) is provided on one side of the pin mounting plate (22). The pin fixing plate (24) and the pin mounting plate (22) cooperate to clamp and fix the pin (23). A second spring (25) is provided between the pin mounting plate (22) and the moving mold base (10).

5. The plastic housing injection mold according to claim 1, characterized in that: The cavity (6) is provided with a cavity insert (26), and the core (12) is provided with a core insert (27) corresponding to the cavity insert (26).

6. The plastic housing injection mold according to claim 1, characterized in that: The fixed mold base (4) and the moving mold base (10) are each provided with a cooling water interface (28), and the fixed mold core (5) and the moving mold core (11) are each provided with a cooling water channel (29) that communicates with the cooling water interface (28).

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