A casing injection mold

Abstract

The utility model relates to a kind of cabinet injection mold, including movable mould base, fixed mould base, symmetrically equipped with shim on movable mould base, shim is equipped with movable mould plate, movable mould plate is equipped with core, fixed mould base is equipped with fixed mould plate, fixed mould plate is equipped with cavity corresponding with core, guide rod is equipped between movable mould plate and movable mould base, guide rod is equipped with mounting plate slidingly, mounting plate is equipped with ejector pin extending into core, the side of mounting plate away from ejector pin is equipped with fixed plate for fixed ejector pin, movable mould plate is movably equipped with forming block in the side of core, forming block is fixedly connected with connecting rod, the end of connecting rod away from forming block is fixedly connected with mounting plate, in injection stage, forming block and core, cavity jointly constitute complete forming cavity, ensure the accurate forming of complex structure of cabinet side face;In stripping stage, forming block moves synchronously with ejector pin, and stripping is assisted from the side of plastic part, and the risk of plastic part deformation is significantly reduced.

Description

Technical Field

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

[0002] In the existing technology, when molding plastic parts with complex side structures (grooves, protrusions, etc.) using injection molds for housings, fixed molding blocks are generally used for direct molding. During demolding, a large ejection force is required to forcefully eject the parts, which can easily lead to tearing or breakage of the side structure of the plastic parts. At the same time, traditional ejection mechanisms rely solely on ejector pins to directly push the bottom of the plastic parts, lacking effective support for the side structure. During the ejection process, uneven force can easily cause the plastic parts to warp and deform, especially for thin-walled, deep-cavity housing plastic parts. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a housing injection mold.

[0004] The objective of this utility model can be achieved through the following technical solution: A housing injection mold includes a moving mold base and a fixed mold base. The moving mold base is symmetrically provided with pads, and a moving template is provided on the pads. A core is provided on the moving template. The fixed mold base is provided with a fixed template, and a cavity corresponding to the core is provided on the fixed template. A guide rod is provided between the moving template and the moving mold base. An mounting plate is slidably provided on the guide rod. An ejector pin is provided on the mounting plate and extends into the core. A fixing plate for fixing the ejector pin is provided on the side of the mounting plate away from the ejector pin. A first spring abuts against the moving template is provided on the other side of the mounting plate. A forming block is movably provided on the moving template at the side of the core. A connecting rod is fixedly connected to the forming block. The end of the connecting rod away from the forming block is fixedly connected to the mounting plate.

[0005] Preferably, a groove is provided on one side of the core on the moving template, a forming slider is slidably provided in the groove, a second spring is provided on one side of the forming block, and an inclined block that cooperates with the forming slider is fixed on the fixed template.

[0006] Preferably, the moving template is provided with a guide, and the fixed template is provided with a guide hole corresponding to the guide post.

[0007] Preferably, cooling water channels are provided inside both the moving template and the fixed template.

[0008] Preferably, a buffer plate is provided between the moving mold base and the fixed plate, and a third spring is provided between the buffer plate and the fixed plate.

[0009] The beneficial effects of this utility model are: by linking the molding block with the mounting plate, the molding and demolding are coordinated. In the injection molding stage, the molding block, core and cavity together form a complete molding cavity, ensuring the accurate molding of the complex structure on the side of the housing; in the demolding stage, the molding block moves synchronously with the ejector pin, assisting in demolding from the side of the plastic part, significantly reducing the risk of plastic part deformation. Attached Figure Description

[0010] 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.

[0011] Figure 1 This is a structural schematic diagram of a housing injection mold according to the present invention.

[0012] Figure 2 This is a schematic diagram of the structure of a moving template for a machine housing injection mold according to the present invention.

[0013] Figure 3 This is a cross-sectional view of a housing injection mold according to the present invention.

[0014] Figure 4 This is a cross-sectional view of the moving template of a machine housing injection mold according to the present invention.

[0015] Figure 5 for Figure 2 A partial schematic diagram is shown in section A.

[0016] The labels in the diagram represent: 1. Moving mold base; 2. Fixed mold base; 3. Pad block; 4. Moving template; 5. Core; 6. Fixed template; 7. Cavity; 8. Guide rod; 9. Mounting plate; 10. Ejector pin; 11. Fixing plate; 12. First spring; 13. Molding block; 14. Connecting rod; 15. Slide groove; 16. Molding slider; 17. Second spring; 18. Inclined block; 19. Guide post; 20. Guide hole; 21. Cooling water channel; 22. Buffer plate; 23. Third spring. Detailed Implementation

[0017] 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.

[0018] 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.

[0019] 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.

[0020] See Figures 1 to 5As shown, the structure of this utility model is as follows: a housing injection mold includes a moving mold base 1 and a fixed mold base 2. The moving mold base 1 is symmetrically provided with pads 3, and a moving template 4 is provided on the pads 3. A core 5 is provided on the moving template 4. The fixed mold base 2 is provided with a fixed template 6, and a cavity 7 corresponding to the core 5 is provided on the fixed template 6. A guide rod 8 is provided between the moving template 4 and the moving mold base 1. A mounting plate 9 is slidably provided on the guide rod 8. An ejector pin 10 extending into the core 5 is provided on the mounting plate 9. A side of the mounting plate 9 away from the ejector pin 10 is provided for fixing the ejector pin. The fixing plate 11 of the pin 10 and the mounting plate 9 have a first spring 12 on the other side that abuts against the moving template 4. A forming block 13 is movably mounted on the side of the core 5 on the moving template 4. A connecting rod 14 is fixedly connected to the forming block 13. The end of the connecting rod 14 away from the forming block 13 is fixedly connected to the mounting plate 9. Specifically, the moving mold base 1 is mounted on the moving template of the injection molding machine and can move flexibly with the opening and closing of the injection molding machine. The fixed mold base 2 is fixed on the fixed template of the injection molding machine, providing a stable support base for the entire mold. The pads 3 symmetrically mounted on the moving mold base 1 serve to support the moving template 4 and leave sufficient ejection space between the moving template 4 and the moving mold base 1, allowing the ejector pin 10 and other demolding components to move smoothly. The core 5 on the moving mold plate 4 and the cavity 7 on the fixed mold plate 6 precisely cooperate to form a closed molding cavity 7 during mold closing. After the molten plastic is injected, it cools and solidifies in the molding cavity 7, forming the outer shape and internal structure of the housing. The guide rod 8 between the moving mold plate 4 and the moving mold base 1 provides a stable sliding track for the mounting plate 9, ensuring that the mounting plate 9 will not tilt during movement. One end of the ejector pin 10 on the mounting plate 9 extends into the core 5, and after the mold opens, it can directly push the plastic part off the core 5 to complete the demolding. The fixing plate 11 installed on the other side of the mounting plate 9 firmly fixes the end of the ejector pin 10 to prevent the ejector pin 10 from loosening and falling off during repeated movement. The first spring 12 between the mounting plate 9 and the moving mold plate 4 is compressed when the plastic part is ejected. After the ejection action is completed, the spring force will push the mounting plate 9 to reset, allowing the ejector pin 10 to retract into the core 5, preparing for the next injection molding. The molding block 13 on the moving mold plate 4 near the side of the core 5 is used to mold complex structures on the side of the housing, such as protrusions or grooves. The molding block 13 is connected to the mounting plate 9 via the connecting rod 14, so that the molding block 13 can move synchronously when the ejector pin 10 moves, avoiding the plastic part being stuck by the side structure when demolding, and making the demolding process smoother.

[0021] like Figure 5As shown, a groove 15 is provided on one side of the core 5 on the moving template 4, and a molding slider 16 slides within the groove 15. A second spring 17 is provided on one side of the molding block 13. An inclined block 18 that cooperates with the molding slider 16 is fixed on the fixed template 6. Specifically, the molding slider 16 is mainly used to mold special structures such as side recesses and side holes on the housing. These structures cannot be directly molded by the core 5 and the cavity 7 and must be achieved by the slider. The second spring 17 on one side of the molding block 13 always applies a restoring force to the molding slider 16. When the mold opens, the fixed template 6 moves the inclined block 18 away, and the spring pushes the molding slider 16 out of the side structure of the plastic part. When the fixed template 6 closes the mold, as the fixed template 6 moves closer to the moving template 4, the inclined block 18 will squeeze the molding slider 16 through the inclined surface, forcing the slider to slide along the groove 15 to the molding position, which is exactly embedded in the cavity 7 to form the side structure of the plastic part. This accurately realizes the side core pulling action and ensures the complete molding of the side structure of the plastic part.

[0022] like Figure 1 , Figure 2 As shown, the moving mold plate 4 is provided with guide pillars 19, and the fixed mold plate 6 is provided with guide holes 20 corresponding to the guide pillars 19. Specifically, when the mold is closed, the moving mold plate 4 moves towards the fixed mold plate 6, and the guide pillars 19 will slowly insert into the guide holes 20, so that the moving mold plate 4 and the fixed mold plate 6 can be precisely aligned and fitted, so that the core 5 and the cavity 7 can be accurately connected without misalignment. This can not only avoid defects such as flash and missing material in the plastic parts, but also prevent the core 5 and the cavity 7 from being damaged due to collision, making the mold closing process both precise and safe.

[0023] like Figure 4 As shown, both the moving mold plate 4 and the fixed mold plate 6 are equipped with cooling water channels 21. Specifically, cooling water channels 21 can be circulated with cooling media such as cooling water. After injection molding, the molten plastic in the molding cavity 7 needs to cool and solidify. At this time, the cooling medium flows in the channels, which can quickly remove the heat transferred by the mold plate, accelerate the cooling speed of the plastic part, shorten the molding cycle, and improve production efficiency. Moreover, uniform cooling can also make the plastic part shrink more evenly, reduce deformation, warping and other problems, and ensure the dimensional accuracy and quality stability of the casing.

[0024] like Figure 1 , Figure 3As shown, a buffer plate 22 is provided between the moving mold base 1 and the fixed plate 11, and a third spring 23 is provided between the buffer plate 22 and the fixed plate 11. Specifically, when the plastic part needs to be ejected after the mold is opened, the ejector rod of the injection molding machine will push the buffer plate 22 forward. After the buffer plate 22 is subjected to force, it squeezes the third spring 23 between itself and the fixed plate 11, causing the spring to gradually compress. During the spring compression process, its elastic force will be smoothly transmitted to the fixed plate 11, pushing the fixed plate 11 to drive the mounting plate 9 and the ejector pin 10 to move forward synchronously, ultimately realizing the action of the ejector pin 10 ejecting the plastic part. The third spring 23 absorbs the impact force at the moment of ejection through compression deformation when the ejector rod pushes, avoiding damage to the ejector pin 10, and also preventing deformation or tearing of the plastic part when it is ejected.

[0025] In practical use, during mold closing, the moving mold base 1 moves closer to the fixed mold base 2 along with the moving template of the injection molding machine. The core 5 on the moving template 4 and the cavity 7 on the fixed template 6 close to form the molding cavity 7. The pad 3 on the moving mold base 1 supports the moving template 4 and reserves ejection space. At this time, under the pre-tightening force of the first spring 12, the mounting plate 9 causes the ejector pin 10 to retract into the core 5. The molding block 13 is connected to the mounting plate 9 through the connecting rod 14 and is in the molding position. During the injection molding stage, the molten plastic is injected into the molding cavity 7 and cooled and solidified. During mold opening, the moving mold base 1 moves the moving template 4 away from the mold. The fixed mold base 2 and the core 5 move with the moving template 4 to attach the plastic part to the core 5. During ejection, the mounting plate 9 slides along the guide post 19, and the ejector pin 10 on it extends out of the core 5 to push the plastic part. The fixing plate 11 fixes the ejector pin 10 to prevent it from loosening. The molding block 13 moves synchronously with the mounting plate 9 through the connecting rod 14 to assist in ejecting the plastic part from the side. The first spring 12 is compressed. After ejection, the first spring 12 pushes the mounting plate 9 to reset, the ejector pin 10 retracts into the core 5, and the molding block 13 also returns to the initial position with the connecting rod 14, waiting for the next mold closing cycle.

[0026] 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 housing injection mold, comprising a moving mold base (1) and a fixed mold base (2), wherein the moving mold base (1) is symmetrically provided with pads (3), the pads (3) are provided with moving templates (4), the moving templates (4) are provided with cores (5), the fixed mold base (2) is provided with fixed templates (6), and the fixed templates (6) are provided with cavities (7) corresponding to the cores (5), characterized in that: A guide rod (8) is provided between the moving template (4) and the moving mold base (1). A mounting plate (9) is slidably provided on the guide rod (8). An ejector pin (10) extending into the core (5) is provided on the mounting plate (9). A fixing plate (11) for fixing the ejector pin (10) is provided on the side of the mounting plate (9) away from the ejector pin (10). A first spring (12) abutting against the moving template (4) is provided on the other side of the mounting plate (9). A forming block (13) is movably provided on the moving template (4) on the side of the core (5). A connecting rod (14) is fixedly connected to the forming block (13). The end of the connecting rod (14) away from the forming block (13) is fixedly connected to the mounting plate (9).

2. The injection mold according to claim 1, characterized in that: The moving template (4) has a groove (15) on one side of the core (5), and a forming slider (16) is slidably arranged in the groove (15). A second spring (17) is provided on one side of the forming block (13), and an inclined block (18) that cooperates with the forming slider (16) is fixed on the fixed template (6).

3. The injection mold according to claim 1, characterized in that: The moving template (4) is provided with guide posts (19), and the fixed template (6) is provided with guide holes (20) corresponding to the guide posts (19).

4. The injection mold according to claim 1, characterized in that: Cooling water channels (21) are provided in both the moving template (4) and the fixed template (6).

5. The injection mold according to claim 1, characterized in that: A buffer plate (22) is provided between the moving mold base (1) and the fixed plate (11), and a third spring (23) is provided between the buffer plate (22) and the fixed plate (11).

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