Injection mold for internal thread product

Abstract

The utility model relates to the technical field of injection molds, in particular to an injection mold for an internal thread product, which comprises a fixed mold plate, a first mold core, a second mold core, a movable mold plate, a driving component, a rotating part, a thread mold core, a mold core pressing plate, a displacement mold plate, a third mold core, a heat conducting part, a cooling water channel, a limiting rod and an inclined driving lever connected with the displacement mold plate, and an inclined hole matched with the inclined driving lever is formed in the second mold core. The heat conduction piece is in sliding connection with the threaded core, the cooling water channel is connected with the heat conduction piece, and the heat conduction piece is fixed relative to the third mold core, so that the sealing performance of the cooling water channel is guaranteed, heat of the threaded core can be conducted to the heat conduction piece, then the heat is taken away by cooling water, cooling of an injection molding product is fully guaranteed, and the cooling efficiency is improved; and the production efficiency and quality of injection products are improved.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and more specifically, to an injection mold for an internal thread product. Background Technology

[0002] For double-ended internal thread PVC conduit connectors commonly used in the electrical conduit industry, the inner wall of the product is designed with a long, continuous internal thread. During mold forming, the threaded core can only be ejected from one side. The threaded core is typically encased in a long, high-temperature injection molded layer. Combined with the friction generated during threading, the core temperature is high upon demolding. Introducing a traditional cooling water system into the rotating core is difficult to achieve a proper cooling water seal. Even expensive spiral sealing mechanisms cannot guarantee a tight seal during rotation. In other words, the threaded core cannot be cooled using traditional cooling water systems, leading to problems such as the plastic part not cooling down in time, sticking to the mold, internal thread breakage, and core burning. Currently, production can only extend the production cycle to allow the threaded core to air-cool naturally before proceeding to the next molding. This not only reduces production efficiency but also causes the injection molded core to remain in the injection molding machine barrel for too long, resulting in carbonization and decomposition of the injection molded core, severely impacting product quality.

[0003] Existing injection molds generally cannot form long internal threads, typically employing double-thread molding at both ends, resulting in relatively poor product connection reliability. Furthermore, the conventional method for molding such long internal thread pipe fittings involves separate demolding with threaded ends. This prevents the threads from aligning at the contact point, causing misalignment during assembly and jamming at thread misalignment points. Additionally, the mold's threaded cores can only be cooled naturally via air cooling, which is unsustainable for stable production, increases production cycles by 20% compared to normal products, and results in products that yellow excessively and have low quality. Utility Model Content

[0004] This invention aims to overcome the shortcomings of existing technologies where products with long internal threads cannot be adequately cooled during injection molding, resulting in long production cycles and low product quality. It provides an injection mold for internal thread products that improves the cooling effect of the mold core, thereby enhancing product production efficiency and quality.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: an injection mold for internal thread products, comprising: a fixed template, a first mold core connected to the fixed template, a second mold core slidably connected to the first mold core, a movable template, a drive assembly connected to the movable template, a rotating component connected to the drive assembly, a threaded core slidably connected to the rotating component, a core pressure plate connected to the movable template, a displacement template slidably connected to the core pressure plate, a third mold core connected to the displacement template, a heat-conducting component connected to the third mold core, and a cooling water channel penetrating the displacement template and the third mold core and connected to the heat-conducting component. A limiting rod that penetrates the displacement template and connects to the core pressure plate, and an inclined lever connected to the displacement template; one end of the threaded core is provided with a threaded portion, and the threaded portion penetrates the heat-conducting component and extends into the first mold core. The first mold core, the second mold core, the third mold core, the heat-conducting component, and the threaded core cooperate to form a mold cavity. When the mold is closed, the core pressure plate abuts against the threaded core. The length of the sliding connection between the rotating component and the threaded core is greater than the length of the injection molded product. The threaded core is radially fixed relative to the rotating component. The second mold core is provided with an inclined hole that cooperates with the inclined lever.

[0006] A fixed mold plate is fixedly installed on the injection molding equipment. Both the first and second mold cores are set on the fixed mold plate, and the moving mold core is set on the injection molding equipment's barrel. The injection molding equipment injects material into the mold cavity through the barrel and the moving mold core. On one side of the fixed mold plate, the first mold core is fixedly set, and the second mold core is slidably set relative to the fixed mold plate. When the mold closes, the second mold core is moved by an inclined lever on the moving mold plate side, causing it to slide and converge from both sides towards the center. When the mold opens, it slides open to both sides, and then the injection molded product is removed. On the moving mold plate side, one end of a threaded core is slidably connected to the threaded core, and the other end, i.e., the end with the threaded portion, extends through a heat-conducting component into the first mold core. The threaded portion on the threaded core forms part of the mold cavity. When the mold closes, the core pressure plate abuts against the threaded core to maintain the sealing of the mold core. When the mold opens, the moving mold plate, the core pressure plate, and the limiting rod move outward together a distance longer than the length of the injection molded product. Afterwards, gaps are left between the end of the threaded core and the moving template, and between the displacement template and the core pressure plate. At this time, the rotating part is still connected to the threaded core. When moving, it does not reach the limit distance of the limit rod. The displacement template is still connected to the fixed template. Then, the drive assembly drives the rotating part to rotate. The rotating part drives the threaded core to rotate. While rotating, the threaded core moves outward by the action of the thread, and then separates from the injection molded product. Then, the mold continues to open. The moving template, the core pressure plate, and the limit rod continue to move outward. At this time, the limit rod also drives the displacement template to move together. The displacement template drives the tilting lever to move. The tilting lever moves the second mold core to both sides to open. Then, the injection molded product is taken out, completing a single injection. Meanwhile, the threaded core passes through the heat-conducting component, which can transfer the heat of the injection molten plastic to the heat-conducting component. Throughout the entire mold opening process, cooling water is always circulating in the cooling water channel. The heat of the injection molten plastic is transferred to the cooling water in the cooling water channel through the threaded core and the heat-conducting component. In this way, the cooling water can quickly remove the heat, thereby shortening the mold opening time, avoiding the yellowing of the product and the carbonization of the molten plastic in the barrel, and ensuring product quality.

[0007] Preferably, the threaded core is provided with mounting holes penetrating both ends of the threaded core. An abutment rod and a first elastic element are respectively provided in the mounting holes. A grommet screw is connected to one end of the mounting hole near the moving template. The two ends of the first elastic element abut against the grommet screw and the abutment rod respectively. The end of the abutment rod away from the first elastic element abuts against the fixed template. A limiting boss for preventing the abutment rod from falling off is provided at the end of the mounting hole near the fixed template.

[0008] The machine screw and the limiting boss restrict the first elastic element and the abutment rod within the mounting hole. The abutment rod abuts against the fixed template. When the threaded core rotates during mold opening, the threaded core is more easily separated from the injection molded product under the elastic force of the first elastic element, making the separation of the threaded core smoother and improving product quality.

[0009] Preferably, it further includes a pin slidably connected to the fixed template, a connecting plate connected to the fixed template, a fixing plate connected to the connecting plate, a push plate connected to the pin, and a second elastic element with its two ends respectively connected to the fixed template and the push plate. The fixing plate is provided with through holes penetrating both sides of the fixing plate.

[0010] The push plate and the ejector pin are slidably connected relative to the fixed template. The connecting plate is used to create a gap between the push plate and the fixed template for the fixed template to move. The fixed plate is used to connect to the injection molding equipment and also to limit the displacement of the push plate. The through hole on the fixed plate is used to connect to the ejection mechanism of the injection molding equipment. The ejection mechanism of the injection molding equipment abuts against the push plate through the through hole, thereby pushing the push plate and the ejector pin to eject the product, thus eliminating the process of manually removing the injection molded product and further improving production efficiency.

[0011] Preferably, the ejector pin is provided with a first air passage penetrating both ends of the ejector pin, the push plate is provided with a second air passage communicating with the first air passage, the first air passage communicating with the mounting hole, the moving template is provided with a third air passage communicating with the mounting hole, the abutment rod is provided with an air passage groove, and the nut screw is provided with a first air passage hole penetrating both ends of the nut screw.

[0012] External airflow enters through the second air passage inside the push plate, then flows sequentially through the first air passage inside the ejector pin, the air groove on the abutment rod, the gap of the first elastic element, the first air passage of the nut screw, and the third air passage inside the moving platen. It then flows out through the third air passage. In this way, the airflow can carry away the heat of the injection molded product and the threaded core, further improving the heat dissipation capacity of the mold, improving the heat dissipation efficiency of the injection molded product, and further improving the production efficiency of the product.

[0013] Preferably, the top axis of the ejector pin is provided with an abutment portion, the abutment rod abuts against the abutment portion, and the abutment portion is provided with a second air passage through both ends of the abutment portion around its perimeter, and the first air passage is connected to the mounting hole through the second air passage.

[0014] The abutting part is used to abut against the ejector pin, the second air passage is used to allow airflow, and the abutting rod directly abuts against the abutting part of the ejector pin, which facilitates the setting of the ejector pin and the abutting rod, so that the top of the ejector pin can abut against the product as much as possible, thereby improving the ejection effect.

[0015] Preferably, an annular seal is provided at the connection between the cooling water channel and the third mold core.

[0016] The cooling water channel runs through the displacement template and the third mold core. An annular seal is installed at the connection between the cooling water channel and the third mold core to ensure the sealing of the cooling water channel and prevent water leakage.

[0017] Preferably, the outer surface of the heat-conducting component is provided with an annular heat dissipation groove, and the cooling water channel is connected to the heat dissipation groove.

[0018] The heat dissipation slots are designed to improve heat dissipation. The heat dissipation slots are connected to the cooling water channels to enhance the cooling effect of the cooling water.

[0019] Preferably, the driving assembly includes a driving motor connected to the moving template, a driving gear connected to the driving motor, and a driven gear rotatably connected to the moving template. The rotating component is a gear component, and the driven gear meshes with the driving gear and the rotating component respectively.

[0020] The drive assembly uses a drive motor as its power source and employs drive gears and driven gears for power transmission to ensure the rotational accuracy of the rotating parts.

[0021] Preferably, the end of the threaded core is provided with an external spline, and the shaft of the rotating part is provided with an internal spline, and the external spline and the internal spline are slidably connected.

[0022] The threaded core and the rotating part are connected by a spline. Specifically, there is a gap between the external spline and the internal spline, which allows the threaded core and the rotating part to slide together, and the rotating part can still drive the threaded core to rotate after sliding.

[0023] Preferably, the sides of the core plate and the displacement template are connected to a detachable limiting plate.

[0024] When the mold is disassembled and transported, the core plate and the displacement template are fixed together by the limiting plate to prevent the displacement template from moving.

[0025] Compared with the prior art, the beneficial effects of this utility model are:

[0026] 1. The heat-conducting component is slidably connected to the threaded core, and the cooling water channel is connected to the heat-conducting component. The heat-conducting component is fixed relative to the third mold core, thereby ensuring the sealing of the cooling water channel and allowing the heat from the threaded core to be conducted to the heat-conducting component, which is then carried away by the cooling water. This ensures sufficient cooling of the injection molded product, improves cooling efficiency, and enhances the production efficiency and quality of the injection molded product.

[0027] 2. The threaded core and the rotating part are axially slidingly connected and radially fixed. When the mold is opened, the threaded core and the rotating part slide to leave a gap. Then the rotating part drives the threaded core to rotate and detach from the product for demolding. Only one threaded core is set in a single mold cavity to ensure the thread continuity of the injection molded product and ensure product quality.

[0028] 3. The first, second and third air passages are set up to air-cool the threaded core to reduce its temperature, further improving the cooling efficiency of the injection molded product and enhancing production efficiency and quality. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of an injection mold for an internal thread product according to this utility model;

[0030] Figure 2 This is a schematic diagram of the installation structure of the limiting rod of the injection mold for an internal thread product according to this utility model;

[0031] Figure 3 This is a schematic diagram of the structure of the driving component of an injection mold for an internal thread product according to this utility model;

[0032] Figure 4 This is a schematic diagram of the internal structure of an injection mold for an internal thread product according to this utility model;

[0033] Figure 5 This is a schematic diagram of the internal structure of an injection mold for an internal thread product according to this utility model from another angle;

[0034] Figure 6 This is a schematic diagram of the installation structure of the threaded core of an injection mold for an internal thread product according to this utility model.

[0035] Figure 7 This is a schematic diagram of the thread core of an injection mold for an internal thread product according to this utility model;

[0036] Figure 8 This is a schematic diagram of the abutment rod of an injection mold for an internal thread product according to this utility model.

[0037] Figure 9 This is a schematic diagram of the ejector pin structure of an injection mold for an internal thread product according to this utility model;

[0038] Figure 10 This is a schematic diagram of the structure of a heat-conducting component for an injection mold of an internal thread product according to this utility model.

[0039] In the diagram: 1. Fixed template; 2. First mold core; 3. Second mold core; 301. Inclined hole; 4. Moving template; 401. Third air passage; 5. Drive assembly; 501. Drive motor; 502. Drive gear; 503. Driven gear; 6. Rotating component; 7. Threaded core; 701. Threaded part; 702. Mounting hole; 703. Limiting boss; 8. Core pressure plate; 9. Displacement template; 10. Third mold core; 11. Heat-conducting component; 1101. Heat dissipation groove; 12. Cooling water channel; 13. Limiting rod; 14. Inclined lever; 15. Abutting rod; 1501. Air passage groove; 16. First elastic element; 17. Measuring screw; 1701. First air passage hole; 18. Ejector pin; 1801. First air passage; 1802. Abutting part; 1803. Second air passage hole; 19. Connecting plate; 20. Fixing plate; 21. Push plate; 2101. Second air passage; 22. Second elastic element; 23. Annular seal; 24. Limiting plate. Detailed Implementation

[0040] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0041] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "long," and "short" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0042] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings:

[0043] Example 1

[0044] like Figure 1-5As shown, an injection mold for an internal thread product includes: a fixed mold plate 1, a first mold core 2 connected to the fixed mold plate 1, a second mold core 3 slidably connected to the first mold core 2, a movable mold plate 4, a drive assembly 5 connected to the movable mold plate 4, a rotating component 6 connected to the drive assembly 5, a threaded core 7 slidably connected to the rotating component 6, a core pressure plate 8 connected to the movable mold plate 4, a displacement mold plate 9 slidably connected to the core pressure plate 8, a third mold core 10 connected to the displacement mold plate 9, a heat-conducting component 11 connected to the third mold core 10, a cooling water channel 12 penetrating the displacement mold plate 9 and the third mold core 10 and connected to the heat-conducting component 11, and a cooling water channel 12 penetrating the displacement mold plate 9 and the third mold core 10 and connected to the heat-conducting component 11. The template 9 is connected to the core plate 8 by a limiting rod 13 and a tilting lever 14 is connected to the displacement template 9; one end of the threaded core 7 is provided with a threaded part 701, and the threaded part 701 passes through the heat-conducting component 11 and extends into the first mold core 2. The first mold core 2, the second mold core 3, the third mold core 10, the heat-conducting component 11 and the threaded core 7 work together to form the mold cavity. When the mold is closed, the core plate 8 abuts against the threaded core 7. The length of the sliding connection between the rotating component 6 and the threaded core 7 is greater than the length of the injection molded product. The threaded core 7 is fixed radially relative to the rotating component 6. The second mold core 3 is provided with an inclined hole 301 that cooperates with the tilting lever 14.

[0045] The fixed mold plate 1 is fixedly installed on the injection molding equipment. The first mold core 2 and the second mold core 3 are both set on the fixed mold plate 1. The moving mold core is set on the barrel of the injection molding equipment. The injection molding equipment injects molded material into the mold cavity through the barrel and the moving mold core. Figure 4-5 As shown, on one side of the fixed template 1, the first mold core 2 is fixedly set, and the second mold core 3 is slidably set relative to the fixed template 1. When the mold is closed, the second mold core 3 is moved by the inclined lever 14 set on one side of the moving template 4, and thus slides and converges from both sides to the middle. When the mold is opened, it slides open to both sides, and then the injection molded product is taken out; as shown. Figure 4-5As shown, on one side of the moving template 4, one end of the threaded core 7 is slidably connected to the threaded core 7, and the other end, which has a threaded portion 701, extends through the heat-conducting component 11 into the first mold core 2. The threaded portion 701 on the threaded core 7 is part of the mold cavity. When the mold is closed, the core platen 8 abuts against the threaded core 7 to maintain the sealing of the mold core. When the mold is opened, the moving template 4, the core platen 8, and the limiting rod 13 move outward together for a distance longer than the length of the injection molded product. After the movement, gaps remain between the end of the threaded core 7 and the moving template 4, and between the displacement template 9 and the core platen 8. At this time, the rotating component 6 is still connected to the threaded core 7. When the core 7 is connected, if the movement does not reach the limiting distance of the limiting rod 13, the displacement template 9 remains connected to the fixed template 1. Then, the drive assembly 5 drives the rotating part 6 to rotate, which in turn drives the threaded core 7 to rotate. While rotating, the threaded core 7 moves outward due to the thread, thus separating from the injection molded product. The mold then continues to open, and the moving template 4, core pressure plate 8, and limiting rod 13 continue to move outward. At this time, the limiting rod 13 also drives the displacement template 9 to move together. The displacement template 9 drives the tilting lever 14 to move, which in turn moves the second mold core 3 to both sides to open, and then the injection molded product is removed, completing a single injection molding operation. Figure 4-6 As shown, the threaded core 7 passes through the heat-conducting component 11, which can transfer the heat of the injection molten plastic to the heat-conducting component 11. During the entire mold opening process, cooling water is always flowing through the cooling channel 12. The heat of the injection molten plastic is transferred to the cooling water in the cooling channel 12 through the threaded core 7 and the heat-conducting component 11. The cooling water can then quickly remove the heat, thereby shortening the mold opening time, avoiding yellowing of the product and carbonization of the molten plastic inside the barrel, and ensuring product quality.

[0046] The beneficial effects of this embodiment are as follows: the heat-conducting component 11 is slidably connected to the threaded core 7, the cooling water channel 12 is connected to the heat-conducting component 11, and the heat-conducting component 11 is fixed relative to the third mold core 10, thereby ensuring the sealing of the cooling water channel 12 and allowing the heat of the threaded core 7 to be conducted to the heat-conducting component 11, and then carried away by the cooling water, thereby fully ensuring the cooling of the injection molded product, improving the cooling efficiency, and improving the production efficiency and quality of the injection molded product.

[0047] Example 2

[0048] The difference between Example 1 and Example 2 is as follows:

[0049] like Figure 4-6As shown, the threaded core 7 has mounting holes 702 penetrating both ends of the threaded core 7. An abutment rod 15 and a first elastic element 16 are respectively installed in the mounting holes 702. A grommet screw 17 is connected to one end of the mounting hole 702 near the moving template 4. Both ends of the first elastic element 16 abut against the grommet screw 17 and the abutment rod 15 respectively. The end of the abutment rod 15 away from the first elastic element 16 abuts against the fixed template 1. A limiting boss 703 is provided at the end of the mounting hole 702 near the fixed template 1 to prevent the abutment rod 15 from falling off. Figure 4-9 As shown, it also includes a ejector pin 18 slidably connected to the fixed template 1, a connecting plate 19 connected to the fixed template 1, a fixing plate 20 connected to the connecting plate 19, a push plate 21 connected to the ejector pin 18, and a second elastic element 22 whose two ends are respectively connected to the fixed template 1 and the push plate 21. The fixing plate 20 is provided with through holes penetrating both sides of the fixing plate 20. The ejector pin 18 is provided with a first air passage 1801 penetrating both ends of the ejector pin 18, the push plate 21 is provided with a second air passage 2101 communicating with the first air passage 1801, the first air passage 1801 communicating with the mounting hole 702, the moving template 4 is provided with a third air passage 401 communicating with the mounting hole 702, the abutment rod 15 is provided with an air passage groove 1501, and the nut screw 17 is provided with a first air passage hole 1701 penetrating both ends of the nut screw 17. The top axis of the ejector pin 18 is provided with an abutment part 1802, and the abutment rod 15 abuts against the abutment part 1802. The abutment part 1802 is provided with a second air passage 1803 that passes through both ends of the abutment part 1802. The first air passage 1801 is connected to the mounting hole 702 through the second air passage 1803.

[0050] The nut screw 17 and the limiting boss 703 restrict the first elastic element 16 and the abutment rod 15 within the mounting hole 702. The abutment rod 15 abuts against the fixed template 1. When the opening threaded core 7 rotates, under the elastic force of the first elastic element 16, the threaded core 7 is more easily separated from the injection molded product, making the separation of the threaded core 7 smoother and improving product quality. The push plate 21 and the ejector pin 18 are slidably connected relative to the fixed template 1. The connecting plate 19 is used to create a gap between the push plate 21 and the fixed template 1 for the fixed template 1 to move. The fixing plate 20 is used to connect to the injection molding equipment and also to limit the displacement of the push plate 21. The through hole on the fixing plate 20 is used to connect to the ejection mechanism of the injection molding equipment. The ejection mechanism of the injection molding equipment abuts against the push plate 21 through the through hole, thereby pushing the push plate 21 and the ejector pin 18 to eject the product, thus eliminating the process of manually removing the injection molded product and further improving production efficiency. External airflow enters through the second air passage 2101 within the push plate 21, then flows sequentially through the first air passage 1801 within the ejector pin 18, the air passage groove 1501 on the abutment rod 15, the gap in the first elastic element 16, the first air passage hole 1701 of the grommets 17, and the third air passage 401 within the moving platen 4, before exiting through the third air passage 401. This airflow effectively carries away heat from the injection-molded product and the threaded core 7, further enhancing the mold's heat dissipation capacity, improving the heat dissipation efficiency of the injection-molded product, and ultimately increasing the product's production efficiency. The abutment portion 1802 abuts against the ejector pin 18, the second air passage hole 1803 allows airflow to pass through, and the abutment rod 15 directly abuts against the abutment portion 1802 of the ejector pin 18. This facilitates the arrangement of the ejector pin 18 and the abutment rod 15, allowing the top of the ejector pin 18 to contact the product as much as possible, thus improving the ejection effect.

[0051] The remaining features and working principles of this embodiment are the same as those of Embodiment 1.

[0052] Example 3

[0053] Based on Example 1 or Example 2, Example 1 or Example 2 are further defined, with the following differences:

[0054] like Figure 5 As shown, an annular seal 23 is provided at the connection between the cooling water channel 12 and the third mold core 10. Figure 6 and Figure 10 As shown, the outer surface of the heat-conducting component 11 is provided with an annular heat dissipation groove 1101, and the cooling water channel 12 is connected to the heat dissipation groove 1101. The drive assembly 5 includes a drive motor 501 connected to the moving template 4, a drive gear 502 connected to the drive motor 501, and a driven gear 503 rotatably connected to the moving template 4. The rotating component 6 is a gear component, and the driven gear 503 meshes with the drive gear 502 and the rotating component 6 respectively. The end of the threaded core 7 is provided with an external spline, and the shaft of the rotating component 6 is provided with an internal spline. The external spline and the internal spline are slidably connected. Figure 1As shown, the sides of the core plate 8 and the displacement template 9 are connected to a detachable limiting plate 24.

[0055] Cooling channel 12 runs through displacement template 9 and third mold core 10. An annular seal 23 is installed at the connection between the cooling channel 12 and the displacement template 9 and third mold core 10 to ensure the sealing of the cooling channel 12 and prevent leakage. A heat dissipation groove 1101 is provided to improve heat dissipation. The heat dissipation groove 1101 is connected to the cooling channel 12 to enhance the cooling effect of the cooling water. The drive assembly 5 uses a drive motor 501 as power, and a drive gear 502 and a driven gear 503 for power transmission to ensure the rotational accuracy of the rotating part 6. The threaded core 7 and the rotating part 6 are connected by a spline connection. Specifically, there is a gap between the external and internal splines to allow sliding between the threaded core 7 and the rotating part 6, and the rotating part 6 can still drive the threaded core 7 to rotate after sliding. During mold disassembly and transfer, the core pressure plate 8 and displacement template 9 are fixed together by a limiting plate 24 to prevent the displacement template 9 from moving.

[0056] In this embodiment, as Figure 3-5 As shown, the mold has a total of 8 mold cavities and 2 sets of drive components 5.

[0057] The remaining working principles and processes of this embodiment are the same as those of Embodiment 1 or Embodiment 2.

[0058] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0059] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An injection mold for an internal thread product, characterized in that, include: Fixed template (1), first mold core (2) connected to the fixed template (1), second mold core (3) slidably connected to the first mold core (2), moving template (4), driving assembly (5) connected to the moving template (4), rotating component (6) connected to the driving assembly (5), threaded core (7) slidably connected to the rotating component (6), core pressure plate (8) connected to the moving template (4), displacement template (9) slidably connected to the core pressure plate (8), third mold core (10) connected to the displacement template (9), heat-conducting component (11) connected to the third mold core (10), cooling water channel (12) penetrating the displacement template (9) and the third mold core (10) and connected to the heat-conducting component (11), limiting rod (13) penetrating the displacement template (9) and connected to the core pressure plate (8), and tilting lever (14) connected to the displacement template (9). The threaded core (7) has a threaded portion (701) at one end, and the threaded portion (701) extends through the heat-conducting component (11) into the first mold core (2). The first mold core (2), the second mold core (3), the third mold core (10), the heat-conducting component (11) and the threaded core (7) cooperate to form a mold cavity. When the mold is closed, the core pressure plate (8) abuts against the threaded core (7). The length of the sliding connection between the rotating component (6) and the threaded core (7) is greater than the length of the injection molded product. The threaded core (7) is fixed radially relative to the rotating component (6). The second mold core (3) has an inclined hole (301) that cooperates with the inclined lever (14).

2. The injection mold for an internal thread product according to claim 1, characterized in that: The threaded core (7) is provided with mounting holes (702) penetrating both ends of the threaded core (7). The mounting holes (702) are respectively provided with abutment rod (15) and a first elastic element (16). The end of the mounting hole (702) near the moving template (4) is connected to a grommet screw (17). The two ends of the first elastic element (16) abut against the grommet screw (17) and the abutment rod (15) respectively. The end of the abutment rod (15) away from the first elastic element (16) abuts against the fixed template (1). The end of the mounting hole (702) near the fixed template (1) is provided with a limiting boss (703) to prevent the abutment rod (15) from falling off.

3. The injection mold for an internal thread product according to claim 2, characterized in that: It also includes a push pin (18) slidably connected to the fixed template (1), a connecting plate (19) connected to the fixed template (1), a fixing plate (20) connected to the connecting plate (19), a push plate (21) connected to the push pin (18), and a second elastic member (22) whose two ends are respectively connected to the fixed template (1) and the push plate (21). The fixing plate (20) is provided with through holes penetrating both sides of the fixing plate (20).

4. The injection mold for an internal thread product according to claim 3, characterized in that: The ejector pin (18) is provided with a first air passage (1801) that passes through both ends of the ejector pin (18), the push plate (21) is provided with a second air passage (2101) that communicates with the first air passage (1801), the first air passage (1801) communicates with the mounting hole (702), the moving template (4) is provided with a third air passage (401) that communicates with the mounting hole (702), the abutment rod (15) is provided with an air passage groove (1501), and the nut screw (17) is provided with a first air passage hole (1701) that passes through both ends of the nut screw (17).

5. The injection mold for an internal thread product according to claim 4, characterized in that: The top of the ejector pin (18) is provided with an abutment part (1802) at the center of the shaft. The abutment rod (15) abuts against the abutment part (1802). The abutment part (1802) is provided with a second air passage (1803) around its perimeter, penetrating both ends of the abutment part (1802). The first air passage (1801) is connected to the mounting hole (702) through the second air passage (1803).

6. The injection mold for an internal thread product according to claim 1, characterized in that: An annular seal (23) is provided at the connection of the cooling water channel (12) between the displacement template (9) and the third mold core (10).

7. The injection mold for an internal thread product according to claim 1, characterized in that: The outer surface of the heat-conducting component (11) is provided with an annular heat dissipation groove (1101), and the cooling water channel (12) is connected to the heat dissipation groove (1101).

8. The injection mold for an internal thread product according to claim 1, characterized in that: The drive assembly (5) includes a drive motor (501) connected to the moving template (4), a drive gear (502) connected to the drive motor (501), and a driven gear (503) rotatably connected to the moving template (4). The rotating component (6) is a gear component, and the driven gear (503) meshes with the drive gear (502) and the rotating component (6) respectively.

9. The injection mold for an internal thread product according to claim 8, characterized in that: The threaded core (7) has an external spline at its end, and the rotating part (6) has an internal spline at its shaft. The external spline and the internal spline are slidably connected.

10. The injection mold for an internal thread product according to claim 1, characterized in that: The sides of the core plate (8) and the displacement template (9) are connected to a detachable limiting plate (24).

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