A guard plate injection mold

Abstract

The application discloses a guard plate injection mold, which comprises an upper mold and a lower mold; a mold cavity is arranged below the upper mold; a mold core is arranged above the lower mold; a base is arranged below the lower mold; an injection channel for guiding melt into the mold is arranged in the upper mold, and the injection channel is communicated with the mold cavity; cooling channels are arranged in the upper mold and the lower mold; the mold further comprises a forming demolding assembly, which comprises a matching groove arranged obliquely inward on the mold core and a matching block in sliding cooperation with the matching groove; and an ejection mechanism is arranged on the base, and an ejection end of the ejection mechanism is connected with the forming demolding assembly. Through the precise matching of the ejection direction and the oblique structure of the guard plate, the stable separation of the product and the mold core is realized, and the product damage caused by the misalignment of the stress direction in the demolding process is avoided.

Description

Technical Field

[0001] This invention relates to a protective plate injection mold, belonging to the field of mold processing technology. Background Technology

[0002] As critical protective components in machinery, automotive, and electronics industries, protective plates require an efficient and stable demolding process after injection molding to ensure product quality and production continuity. The rationality of the demolding system design directly determines the molding accuracy, surface integrity, and production efficiency of the protective plate. Currently, the ejection structure of conventional protective plate injection molds generally adopts a single vertical ejection design. That is, through ejector pins perpendicular to the mold core end face, a vertical pushing force is applied during demolding to separate the product from the mold core. Although this traditional ejection method is simple in structure and low in cost, it has certain applicability in the production of protective plates with planar structures or simple shapes. However, when producing protective plates with complex structures (such as inclined surfaces, inclined fitting grooves, multiple molding grooves, etc.), some problems exist: the ejection direction does not match the product separation trajectory, which can easily cause product damage. To meet assembly and positioning requirements, some protective plates often have an inwardly inclined fitting structure or a contour that adapts to the tilt of the mold core on their molding surface. The direction of the force applied during conventional vertical ejection forms an angle with the separation trajectory of the protective plate and the mold core, causing the force direction on the product during ejection to contradict the stress characteristics of its own structure. This misaligned force easily leads to localized stress concentration in the protective plate, especially in weak areas such as inclined fitting grooves and molding grooves, which can easily cause problems such as edge chipping, surface scratches, and internal structural deformation, seriously affecting the product qualification rate. At the same time, vertical ejection cannot allow the product to separate smoothly along the mating surface with the mold core, which can easily cause hard friction between the product and the inner wall of the mold core, damaging the surface finish of the product. In addition, angled ejection mechanisms with angle adjustment functions have emerged in the industry. By adjusting the tilt angle of the ejector rod, they can adapt to the product's demolding trajectory. However, existing angle adjustment structures still have obvious technical limitations: one type uses a slot-type positioning structure, which relies on the hard contact between the slot and the block to achieve positioning. It has good load-bearing capacity and impact resistance, but the adjustment positions are fixed and limited in number, making it impossible to achieve stepless fine adjustment and difficult to accurately match the demolding angle of special specification guard plates; the other type uses a free sliding groove structure, which can achieve continuous stepless adjustment and has high adaptability. However, positioning relies on friction locking. Under the impact load of long-term high-frequency ejection of the mold, it is prone to position slippage, resulting in ejection angle deviation. It cannot guarantee the stability and consistency of mass production and cannot simultaneously take into account the flexibility of mold adjustment and the reliability of mass production. Summary of the Invention

[0003] The purpose of this invention is to provide a retaining plate injection mold. This invention achieves smooth separation of the product from the mold core through precise matching of the ejection direction with the inclined structure of the retaining plate, avoiding product damage caused by misalignment of force direction during demolding.

[0004] The technical solution of the present invention: A protective plate injection mold includes an upper mold and a lower mold; a mold cavity is provided below the upper mold; a mold core is provided above the lower mold; a base is provided below the lower mold; an injection channel for introducing melt is provided inside the upper mold, and the injection channel is connected to the mold cavity; both the upper mold and the lower mold are provided with cooling channels; the mold further includes:

[0005] The molding and demolding assembly includes a mating groove inclined inwardly disposed on the mold core and a mating block that slides with the mating groove; the molding and demolding assembly is used to cooperate with the mold core during injection molding to jointly form the inclined structure of the guard plate, and after molding, it is ejected along the inclined direction of the mating groove to achieve the separation of the product from the mold core;

[0006] An ejection mechanism is mounted on a base, and its ejection end is connected to the molding and demolding assembly. The ejection mechanism is equipped with an adjustable ejection direction adjustment mechanism, which is used to provide the molding and demolding assembly with an inclined ejection power that is adapted to the separation trajectory of the guard plate during the demolding process.

[0007] In the aforementioned protective plate injection mold, the bottom of the fitting groove is provided with a first insert groove; the bottom of the fitting block is provided with a first locking block, and the first locking block cooperates with the first insert groove.

[0008] The aforementioned protective plate injection mold has multiple molding grooves on the outer bottom of the fitting groove, and the molding grooves are connected to the outer surface of the mold core.

[0009] The aforementioned protective plate injection mold includes an ejection mechanism comprising a first base plate disposed on a base and located below the lower mold, a second base plate disposed above the first base plate, a plurality of adjustment grooves disposed on the second base plate, and an adjustment mechanism disposed within the adjustment grooves; the adjustment end of the adjustment mechanism is provided with a first ejector rod, which passes through the lower mold and is connected to the molding and demolding assembly.

[0010] The aforementioned protective plate injection mold includes an adjustment mechanism comprising symmetrically arranged adjustment blocks within an adjustment groove, with a second locking block on the outer side of each adjustment block; the inner wall of the adjustment groove is provided with a strip groove, a movable groove is connected above the strip groove, and multiple second locking slots are arranged along the length of the bottom of the movable groove; one end of the movable groove is provided with a movable notch communicating with the strip groove; the second locking block can slide within the movable groove and lock into the corresponding second locking slot to achieve gear positioning, or it can slide freely within the strip groove through the movable notch; a swing block is rotatably connected between the adjustment blocks, and the swing block is fixedly connected to the lower end of the first push rod.

[0011] In the aforementioned protective plate injection mold, the movable groove and the strip groove are arranged parallel to each other in the vertical direction along the height direction of the adjustment groove, and the movable notch is set at the end of the movable groove and extends downward to the strip groove; the thickness of the second locking block is adapted to the groove depth of the movable groove and the strip groove.

[0012] In the aforementioned protective plate injection mold, a linear drive assembly is provided at the bottom of the base. The fixed end of the linear drive assembly passes through the first base plate and the second base plate and is fixedly connected to the lower end face of the lower mold. The moving end of the linear drive assembly abuts against the lower part of the first base plate. Multiple guide rods are provided between the base and the lower mold, and the first base plate and the second base plate slide in cooperation with the guide rods.

[0013] In the aforementioned protective plate injection mold, a plurality of second ejector pins are provided above the second base plate; a plurality of through slots are provided inside the lower mold, and the through slots are provided on the contact surface between the lower mold and the upper mold; the second ejector pins pass through the through slots and are simultaneously lifted when the second base plate is raised, so as to ensure that the upper mold and the lower mold separate during demolding.

[0014] In the aforementioned protective plate injection mold, the first ejector pin includes a first upper pin connected to the molding and demolding assembly and a first lower pin connected to the adjustment mechanism; the lower end of the first upper pin is provided with a stroke groove, and the first lower pin is slidably connected to the stroke groove; initially, the upper end face of the second ejector pin is located below the upper end face of the through groove, and the distance is less than the length of the stroke groove.

[0015] In the aforementioned protective plate injection mold, hook-shaped blocks are symmetrically arranged on both sides of the lower part of the upper mold, and the inner side of the hook-shaped blocks is provided with a first inclined surface, which is inclined inward and upward; vertical grooves are symmetrically arranged on both sides of the upper part of the lower mold, and a horizontal groove is connected to the lower part of the vertical groove. A limiting block is slidably connected in the horizontal groove, and a second inclined surface is provided on the outer side of the limiting block, which cooperates with the first inclined surface; a spring is provided between the limiting block and the inner wall of the horizontal groove; an insertion groove is provided at the lower end of the limiting block, and a third inclined surface is provided in the insertion groove, which is inclined outward and upward; a third push rod is provided above the second base plate, and a fourth inclined surface is provided at the upper end of the third push rod, which cooperates with the third inclined surface.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. This invention achieves coordinated operation between injection molding and demolding processes by setting a molding and demolding component on the mold core and configuring a matching ejection mechanism on the base. During injection molding, the molding and demolding component stably engages with the mold core, providing reliable support and restraint for the molten plastic, ensuring the molding accuracy and structural integrity of the protective plate product. During demolding, the ejection mechanism provides stable and controllable ejection power to the molding and demolding component, causing the product to separate from the mold core along the inclined direction of the engagement groove. This avoids uneven force distribution and localized stress concentration caused by single vertical ejection, effectively reducing the risk of product deformation, tearing, or breakage, and improving the molding quality and overall production stability of the protective plate.

[0018] 2. This invention achieves automatic switching between mold closing locking and demolding release through the linkage design between the first base plate, the second base plate, the linear drive assembly, and the multi-stage ejector pins, combined with the hook block, the limiting block, the spring, and the inclined surface cooperation structure. During mold closing, the hook block moves down with the upper mold into the vertical groove. The interaction between the first and second inclined surfaces pushes the limiting block inward. After mold closing, under the spring reset action, the limiting block is locked above the hook part of the hook block, thus reliably locking the upper and lower molds in the injection molding state, ensuring tight mold closure and stable force. Before demolding, the linear drive assembly drives the first and second base plates to move upward as a whole. The fourth inclined surface of the third ejector pin cooperates with the third inclined surface of the limiting block, causing the limiting block to move inward again and release the restriction on the hook block, achieving smooth unlocking. Subsequently, the second ejector pin ejects and cooperates with the through-groove structure to ensure reliable separation of the upper and lower molds. Further, the second base plate continues to move upward, and through the stroke cooperation of the first lower rod and the first upper rod, the molding demolding assembly is lifted to complete demolding. Meanwhile, the adjustment mechanism features dual-mode adjustment capabilities: a hard-position limit and stepless free sliding. During stable mass production, the second slotted positioning mode is used, relying on hard contact to bear the ejection reaction force and impact load, ensuring good anti-slip properties and precision retention, thus guaranteeing long-term production stability. For production changeovers or when fine-tuning the demolding angle is required, it can quickly switch to the free sliding mode of the strip groove, achieving stepless continuous fine-tuning to adapt to the demolding trajectory requirements of different sized guard plates. The two modes can be quickly switched without the need for additional parts, balancing mass production reliability and mold adjustment flexibility. This simplifies the installation and debugging process and effectively avoids damage to inclined guard plates caused by directional mismatch during demolding. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a structural diagram of the lower mold;

[0021] Figure 3 This is a schematic diagram of the fitting groove structure;

[0022] Figure 4 This is a schematic diagram showing the connection between the mating block and the ejection mechanism;

[0023] Figure 5 This is a structural diagram of the ejection mechanism;

[0024] Figure 6 This is a structural schematic diagram of the first push rod;

[0025] Figure 7 This is a cross-sectional view of the present invention;

[0026] Figure 8 yes Figure 7 Enlarged view of point A;

[0027] Figure 9 This is a schematic diagram of the adjustment mechanism;

[0028] Figure 10 This is a schematic diagram of the protective plate produced by this invention.

[0029] The labels in the attached diagram are as follows: 1-Upper mold, 2-Lower mold, 3-Molding and demolding assembly, 4-Ejection mechanism, 5-Mold cavity, 6-Mold core, 7-Base, 8-Injection channel, 9-Cooling channel, 30-Matching groove, 31-First insert groove, 32-Matching block, 33-First insert block, 34-Molding groove, 400-First base plate, 401-Second base plate, 402-Adjustment groove, 403-Adjustment mechanism, 404-First ejector pin, 405-Adjustment block, 406-Second insert block, 407-Strip groove, 408-Second insert 409-Swing block, 410-Linear drive assembly, 411-Guide rod, 412-Second push rod, 413-Through slot, 414-First upper rod, 415-First lower rod, 416-Stroke slot, 417-Hook block, 418-First inclined surface, 419-Vertical slot, 420-Horizontal slot, 421-Restriction block, 422-Second inclined surface, 423-Spring, 424-Insertion slot, 425-Third inclined surface, 426-Third push rod, 427-Fourth inclined surface, 428-Moving slot, 429-Moving notch. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0031] Example: A protective plate injection mold, configured as follows Figure 1-9 As shown, the mold includes an upper mold 1 and a lower mold 2. A mold cavity 5 for forming a protective plate is formed below the upper mold 1. A mold core 6 is correspondingly positioned above the lower mold 2. The mold core 6 and the mold cavity 5 cooperate to define the forming space of the protective plate. A base 7 is positioned below the lower mold 2, providing installation support and a load-bearing foundation for the entire mold structure. Figure 1 As shown, the upper mold 1 is equipped with an injection channel 8 for introducing molten plastic. The injection channel 8 is connected to the mold cavity 5, allowing the melt to enter the mold cavity 5 evenly to complete the injection molding process. Both the upper mold 1 and the lower mold 2 are equipped with cooling channels 9, which can be circulated with cooling media. By simultaneously cooling the mold cavity 5 and the mold core 6, the solidification and shaping of the product is accelerated, improving molding efficiency and dimensional stability. The mold also includes:

[0032] Molding and demolding component 3, such as Figures 2 to 4As shown, the assembly includes a mating groove 30 inclined inwardly disposed on the mold core 6 and a mating block 32 that slides with the mating groove 30. The molding and demolding assembly 3 is used to cooperate with the mold core 6 during injection molding to jointly form the inclined structure of the protective plate. After molding, it is ejected along the inclined direction of the mating groove 30 to achieve separation of the product from the mold core 6. The mating groove 30 is inclined inwardly as a whole to adapt to the inclined structural features of the protective plate itself. A first locking groove 31 is provided at the bottom of the mating groove 30. The mating block 32 is preferably made of wear-resistant metal material, and a first locking block 33 is provided at its bottom. The first locking block 33 cooperates with the first locking groove 31 to limit the position of the mating block 32 during the injection molding stage, thereby ensuring the stability of the molding and demolding assembly 3 under high-pressure injection molding environment. Figure 3 and Figure 5 As shown, the bottom outer side of the fitting groove 30 is also provided with a number of shaping grooves 34. The shaping grooves 34 are connected to the outer surface of the mold core 6 and are used to form corresponding shaping structures on the protective plate. At the same time, they also help to reduce demolding resistance and prevent the product from being damaged during demolding.

[0033] Ejection mechanism 4 is mounted on base 7, and its ejection end is connected to molding and demolding assembly 3; the ejection mechanism 4 is provided with an adjustable ejection direction adjustment mechanism 403, which is used to provide the molding and demolding assembly 3 with an inclined ejection force adapted to the separation trajectory of the guard plate during demolding; such as Figure 4 and Figure 5 As shown, the ejection mechanism 4 includes a first base plate 400 disposed on the base 7 and located below the lower mold 2. A second base plate 401 is disposed above the first base plate 400. Both the first base plate 400 and the second base plate 401 are preferably made of high-strength steel plates to ensure good rigidity and durability during repeated ejection. The second base plate 401 is provided with multiple adjustment slots 402, and an adjustment mechanism 403 is disposed within the adjustment slots 402. The adjustment end of the adjustment mechanism 403 is provided with a first ejector rod 404. The adjustment end refers to the end used to connect with the first ejector rod 404 to transmit the ejection force. The first ejector rod 404 passes through the lower mold 2 and connects to the molding and demolding assembly 3 to transmit the ejection force to the molding and demolding assembly 3. Figure 9As shown, the adjustment mechanism 403 includes adjustment blocks 405 symmetrically arranged within the adjustment groove 402. A second locking block 406 is provided on the outer side of the adjustment block 405. A strip groove 407 is provided on the inner wall of the adjustment groove 402. A movable groove 428 is connected parallel to the top of the strip groove 407. Multiple second locking slots 408 are evenly arranged along the length direction at the bottom of the movable groove 428. A downwardly penetrating movable notch 429 is provided at one end of the movable groove 428 along the length direction. The movable notch 429 connects the movable groove 428 with the strip groove 407 below, forming a transition channel for the second locking block 406 to switch paths between the two grooves. In the gear positioning mode of stable mass production, the second locking block 406 is housed in the movable groove 428. After moving laterally along the movable groove 428 to the target position, it is locked downward into the corresponding second locking slot 408. The hard contact between the locking block and the side wall of the slot achieves bidirectional limiting and locking in both the lateral and vertical directions. In this state, the lateral force and impact load transmitted by the first ejector rod 404 during ejection are directly borne by the rigid sidewall of the second locking groove 408, without relying on friction for locking. This ensures stable positioning accuracy, strong anti-slip capability, and minimal angular drift even during long-term high-frequency cyclic operation, maintaining consistent ejection angle and fully adapting to the requirements of large-volume continuous production. When production changeover and fine-tuning of the demolding angle of the special guard plate are required, the adjusting block 405 can be raised upwards to disengage the second locking block 406 from the second locking groove 408 and return it to the interior of the movable groove 428. Subsequently, the second locking block 406 is slid along the movable groove 428 to the movable notch 429, and then the adjusting block 405 is moved downwards to allow the second locking block 406 to fall into the lower strip groove 407 through the movable notch 429. At this time, the second locking block 406 can slide freely and continuously along the length direction within the strip groove 407, driving the adjusting blocks 405 on both sides to move synchronously. This, in turn, allows for stepless adjustment of the tilt angle of the first push rod 404 through the hinged rotation of the swing block 409, achieving precise adaptation to any angle without being limited by fixed positions. This significantly improves the adaptability flexibility of guard plate products with different specifications and demolding angles. After the angle fine-tuning is completed, the second locking block 406 can be retracted along the original path through the movable notch 429 into the movable slot 428 and locked rigidly into the second locking slot 408 closest to the target angle. This achieves both stepless adjustment and position locking simultaneously without the need for additional locking parts, balancing adjustment flexibility and operational reliability. A swing block 409 is rotatably connected between the two adjusting blocks 405. The swing block 409 is fixedly connected to the lower end of the first ejector rod 404. By rotating the swing block 409, the first ejector rod 404 can be installed at a preset angle, so that the ejection direction is no longer limited to the vertical direction, better conforming to the actual demolding trajectory of the guard plate, reducing demolding resistance, and alleviating the problem of concentrated force on the product. Figure 4 and Figure 5As shown, a linear drive assembly 410 is provided at the bottom of the base 7. The fixed end of the linear drive assembly 410 passes through the first base plate 400 and the second base plate 401 in sequence and is fixedly connected to the lower end face of the lower mold 2. Its moving end abuts against the lower part of the first base plate 400. The linear drive assembly 410 can adopt a hydraulic cylinder or electric push rod structure to provide a stable and controllable linear driving force during the demolding stage. Multiple guide rods 411 are provided between the base 7 and the lower mold 2. The first base plate 400 and the second base plate 401 slide with the guide rods 411, ensuring smooth movement and uniform force during ejection under the guiding action, and avoiding wear of the mechanism due to uneven load. Figure 4 As shown, multiple second ejector pins 412 are provided above the second base plate 401, and multiple through slots 413 are provided inside the lower mold 2. The through slots 413 are located at the contact surface between the lower mold 2 and the upper mold 1. The second ejector pins 412 pass into the through slots 413 and are simultaneously ejected when the second base plate 401 rises. This is used to reliably separate the upper mold 1 and the lower mold 2 in the initial stage of demolding, preventing difficulties in mold separation caused by mold adsorption or negative pressure. Figure 6 As shown, the first ejector rod 404 includes a first upper rod 414 connected to the molding and demolding assembly 3 and a first lower rod 415 connected to the adjustment mechanism 403. The lower end of the first upper rod 414 is provided with a stroke groove 416, and the first lower rod 415 is slidably connected to the stroke groove 416. In the initial state, the upper end face of the second ejector rod 412 is located below the upper end face of the through groove 413, and the distance is less than the length of the stroke groove 416. This allows the upper mold 1 and the lower mold 2 to be separated first during the demolding process, and then the first ejector rod 404 continues to lift the molding and demolding assembly 3 to achieve step-by-step demolding, making the process more stable and reliable.

[0034] like Figure 7 and Figure 8As shown, hook-shaped blocks 417 are symmetrically arranged on both sides below the upper mold 1, and the inner side of the hook-shaped blocks 417 is provided with a first inclined surface 418 that slopes inward and upward. Vertical grooves 419 are correspondingly arranged on both sides above the lower mold 2, and a horizontal groove 420 is connected below the vertical grooves 419. A limiting block 421 is slidably connected in the horizontal groove 420. A second inclined surface 422 that cooperates with the first inclined surface 418 is provided on the outer side of the limiting block 421. A spring 423 is provided between the limiting block 421 and the inner wall of the horizontal groove 420. An insertion groove 424 is provided at the lower end of the limiting block 421. A third inclined surface 425 that slopes outward and upward is provided in the insertion groove 424. A third push rod 426 is provided above the second base plate 401. A fourth inclined surface 427 that cooperates with the third inclined surface 425 is provided at the upper end of the third push rod 426. During the mold closing process, the hook block 417 moves down with the upper mold 1 into the vertical groove 419, and pushes the limiting block 421 inward through the inclined surface. After the mold closing is completed, the limiting block 421 is reset and locked above the hook block 417 under the action of the spring 423, thereby achieving reliable locking of the upper mold 1 and the lower mold 2. During the demolding stage, the third ejector rod 426 moves up with the second base plate 401, and its fourth inclined surface 427 cooperates with the third inclined surface 425 to make the limiting block 421 move inward again, releasing the restriction on the hook block 417. This ensures that the mold closing locking and demolding release can be automatically switched. The overall structure is stable and the operation is reliable, effectively improving the molding quality and service life of the mold.

[0035] Working principle:

[0036] During the injection molding stage, the upper mold 1 and the lower mold 2 approach each other under the action of the mold closing mechanism. The hook-shaped block 417 below the upper mold 1 moves down synchronously with the upper mold 1 and enters the vertical groove 419 above the lower mold 2. When the hook-shaped block 417 continues to descend, the first inclined surface 418 on its inner side contacts the second inclined surface 422 on the outer side of the limiting block 421 in the horizontal groove 420 and generates a wedging effect, causing the limiting block 421 to move inward against the elastic force of the spring 423. As the mold closing stroke is completed, the hook-shaped block 417 no longer applies pressure to the limiting block 421. Under the reset action of the spring 423, the limiting block 421 moves outward and is locked above the hook part of the hook-shaped block 417, thereby forming a reliable mechanical lock for the upper mold 1 and the lower mold 2, ensuring that the mold closes tightly during the injection process and preventing mold bulging or material leakage due to excessive injection pressure. Meanwhile, the fitting block 32 in the molding and demolding assembly 3, under the limiting action of the first locking block 33 and the first locking groove 31, stably fits with the mold core 6, effectively supporting the inner structure and inclined part of the guard plate. After the molten plastic enters the mold cavity 5 through the injection channel 8, it completes the mold filling and is rapidly cooled and shaped under the action of the cooling channel 9 inside the upper mold 1 and the lower mold 2.

[0037] During the demolding preparation stage, the linear drive assembly 410 is activated, and its moving end pushes the first base plate 400 and the second base plate 401 upward as a whole. Under the guidance of the guide rod 411, the movement process is ensured to be smooth and reliable. As the second base plate 401 moves upward, the third ejector rod 426 rises synchronously. The fourth inclined surface 427 at its upper end interacts with the third inclined surface 425 in the insertion slot 424 of the limiting block 421, pushing the limiting block 421 to move inward again, thereby releasing the limiting block 421 from the hook block 417 and realizing the automatic unlocking of the mold closing locking structure, creating conditions for subsequent mold separation.

[0038] During the mold separation stage, the second base plate 401 continues to move upward, and the second ejector rod 412 set on it first passes through the through groove 413 in the lower mold 2 and lifts the upper mold 1, so that the upper mold 1 and the lower mold 2 separate in the vertical direction, avoiding the mold from getting stuck due to adsorption or negative pressure.

[0039] During the product demolding stage, the second base plate 401 moves further upward. When the first lower rod 415 abuts against the inner end face of the stroke groove 416, the first lower rod 415 drives the first upper rod 414 to move synchronously, causing the first ejector rod 404 to apply an ejection force to the molding demolding assembly 3 at a preset angle. Under the action of the adjustment mechanism 403, the ejection direction of the first ejector rod 404 can be adjusted according to the inclined structure of the guard plate, so that the molding demolding assembly 3 ejects the guard plate in a direction consistent with the product separation trajectory, avoiding the force deviation caused by traditional vertical ejection. Finally, the molding demolding assembly 3 moves upward as a whole, and the guard plate product separates smoothly from the mold core 6, completing the demolding process and finally obtaining the product as shown in the figure. Figure 10 The protective panel product shown.

[0040] During the reset phase, the linear drive assembly 410 reverses its movement, and the first base plate 400 and the second base plate 401 fall back to their initial positions under the guidance of the guide rod 411, and each ejector rod is reset accordingly; under the action of the spring 423, the limiting block 421 returns to its initial state and re-enters the mold closing position, preparing for the next injection molding cycle.

Claims

1. A protective plate injection mold, comprising an upper mold (1) and a lower mold (2); a mold cavity (5) is provided below the upper mold (1); a mold core (6) is provided above the lower mold (2); a base (7) is provided below the lower mold (2); an injection channel (8) for introducing melt is provided inside the upper mold (1), and the injection channel (8) is connected to the mold cavity (5); both the upper mold (1) and the lower mold (2) are provided with cooling channels (9); characterized in that: The mold further includes: a molding demolding assembly (3), including a mating groove (30) inclined inwardly disposed on the mold core (6) and a mating block (32) slidingly engaged with the mating groove (30); the molding demolding assembly (3) is used to cooperate with the mold core (6) during injection molding to jointly form the inclined structure of the guard plate, and after molding, it is ejected along the inclined direction of the mating groove (30) to achieve separation of the product from the mold core (6); an ejection mechanism (4) is disposed on the base (7), and its ejection end is connected to the molding demolding assembly (3); the ejection mechanism (4) is provided with an adjustable ejection direction adjustment mechanism (403) for providing the molding demolding assembly (3) with an inclined ejection power adapted to the separation trajectory of the guard plate during the demolding process; The ejection mechanism (4) includes a first base plate (400) disposed on the base (7) and located below the lower mold (2), a second base plate (401) disposed above the first base plate (400), a plurality of adjustment slots (402) disposed on the second base plate (401), and an adjustment mechanism (403) disposed in the adjustment slots (402); the adjustment end of the adjustment mechanism (403) is provided with a first push rod (404), and the first push rod (404) passes through the lower mold (2) and is connected to the molding and demolding assembly (3); The adjustment mechanism (403) includes adjustment blocks (405) symmetrically arranged in the adjustment groove (402), and a second locking block (406) is provided on the outer side of the adjustment block (405); the inner wall of the adjustment groove (402) is provided with a strip groove (407), and a movable groove (428) is connected above the strip groove (407). Multiple second locking slots (408) are arranged along the length direction at the bottom of the movable groove (428), and one end of the movable groove (428) is provided with a movable notch (429) that communicates with the strip groove (407); the second locking block (406) slides in the movable groove (428) and locks into the corresponding second locking slot (408) to achieve gear positioning or slides freely in the strip groove (407) through the movable notch (429); a swing block (409) is rotatably connected between the adjustment blocks (405), and the swing block (409) is fixedly connected to the lower end of the first push rod (404); The movable groove (428) and the strip groove (407) are arranged parallel to each other in the vertical direction along the height of the adjustment groove (402). The movable notch (429) is set at the end of the movable groove (428) and extends downward to the strip groove (407). The thickness of the second locking block (406) is adapted to the groove depth of the movable groove (428) and the strip groove (407).

2. The injection mold for the protective plate according to claim 1, characterized in that: The bottom of the fitting groove (30) is provided with a first insert groove (31); the bottom of the fitting block (32) is provided with a first locking block (33), and the first locking block (33) cooperates with the first insert groove (31).

3. The injection mold for the protective plate according to claim 2, characterized in that: The bottom outer side of the fitting groove (30) is provided with a plurality of shaping grooves (34), which are connected to the outer surface of the mold core (6).

4. The injection mold for the protective plate according to claim 1, characterized in that: The bottom of the base (7) is provided with a linear drive assembly (410). The fixed end of the linear drive assembly (410) passes through the first base plate (400) and the second base plate (401) and is fixedly connected to the lower end face of the lower mold (2). The moving end of the linear drive assembly (410) abuts against the lower part of the first base plate (400). Multiple guide rods (411) are provided between the base (7) and the lower mold (2). The first base plate (400) and the second base plate (401) slide in cooperation with the guide rods (411).

5. The injection mold for the protective plate according to claim 1, characterized in that: The second base plate (401) is provided with multiple second push rods (412); the lower mold (2) is provided with multiple through slots (413), which are located on the contact surface between the lower mold (2) and the upper mold (1); the second push rods (412) are inserted into the through slots (413) and are simultaneously pushed up when the second base plate (401) is raised, so as to ensure that the upper mold (1) and the lower mold (2) are separated when demolding.

6. The injection mold for the protective plate according to claim 5, characterized in that: The first push rod (404) includes a first upper rod (414) connected to the molding and demolding assembly (3) and a first lower rod (415) connected to the adjustment mechanism (403); the lower end of the first upper rod (414) is provided with a stroke groove (416), and the first lower rod (415) is slidably connected to the stroke groove (416); the upper end face of the second push rod (412) is initially located below the upper end face of the through groove (413), and the distance between the upper end face of the second push rod (412) and the upper end face of the through groove (413) is less than the length of the stroke groove (416).

7. The injection mold for the protective plate according to claim 6, characterized in that: The upper mold (1) has symmetrical hook blocks (417) on both sides below it. The inner side of the hook blocks (417) has a first inclined surface (418) that slopes inward and upward. The lower mold (2) has symmetrical vertical grooves (419) on both sides above it. A horizontal groove (420) is connected to the lower side of the vertical grooves (419). A limiting block (421) is slidably connected in the horizontal groove (420). A second inclined surface (422) is provided on the outer side of the limiting block (421). The second inclined surface (422) and the first inclined surface (418) are connected inward and upward. 18) Cooperating; a spring (423) is provided between the inner wall of the limiting block (421) and the transverse groove (420); an insertion groove (424) is provided at the lower end of the limiting block (421), and a third inclined surface (425) is provided in the insertion groove (424), the third inclined surface (425) is inclined outward and upward; a third push rod (426) is provided above the second base plate (401), and a fourth inclined surface (427) is provided at the upper end of the third push rod (426), the fourth inclined surface (427) cooperates with the third inclined surface (425).

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