Injection molding structure with fast switching mold core and molded stator formed thereby

Abstract

The utility model provides an injection structure of quick switching mould core and the plastic package stator injection mold formed by it, wherein, the injection structure of quick switching mould core includes: fixed plate, be provided with first fixed recess in the fixed plate, be located the cavity plate of fixed plate top, be provided with the cavity of placing mould core in the cavity plate, be provided with first fixed through -hole in the cavity, be located mould core in the cavity, be provided with second fixed through -hole in the mould core, fastener, the fastener passes in second fixed through -hole, first fixed through -hole and first fixed recess in proper order. The present application can realize the quick replacement of mould core through a fastener, and the switching mould core time is shortened to single 10min from single two hours in prior art, effectively improves the mould core replacement efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of injection mold structure design, and in particular to an injection molding structure for quick core switching and the resulting encapsulated stator injection mold. Background Technology

[0002] The injection mold used in the existing plastic encapsulated stator has a fixed mold core structure. The injection mold needs to be compatible with mold cores of different sizes. Each time the mold core is changed, the injection mold needs to be disassembled, and after replacing it with a mold core of another size, the injection mold needs to be reassembled.

[0003] Since each mold core replacement requires the injection mold to be fully disassembled, and the time required for a single mold core change is about 2 hours, the process of changing the mold core is time-consuming, labor-intensive, and extremely inefficient, which seriously affects the production efficiency of the molded stator.

[0004] CN206264285U discloses a mold blank structure for quick mold core replacement; it includes a front mold blank and a rear mold blank. The front mold blank has a front mold cavity for receiving and fixing the front mold core, and the rear mold blank has a rear mold cavity for receiving and fixing the rear mold core. The front and rear mold cavities close together to form a cavity for assembling the mold core. The front mold core and the front mold cavity are fixedly connected by front mold core bolts, and the rear mold core and the rear mold cavity are fixedly connected by rear mold core bolts. A first pressure block and a second pressure block are then used to further fix the front and rear mold cores. Disassembly and replacement can be completed simply by removing the corresponding front and rear mold core bolts. However, in this technical solution, the front and rear mold core bolts are located at the edge of the mold core, requiring multiple bolts for tightening and disassembly. Due to the large number of bolts, the efficiency of disassembly and replacement cannot be further improved. Summary of the Invention

[0005] To overcome the problems existing in related technologies, one of the objectives of this utility model is to provide an injection molding structure for quick mold core switching. The mold core can be quickly replaced with a single fastener, reducing the mold core switching time from two hours per cycle in the prior art to 10 minutes per cycle, effectively improving the mold core replacement efficiency.

[0006] An injection molding structure for quick mold core switching includes: A fixing plate, wherein a first fixing groove is provided in the fixing plate; A cavity plate located at the top of the fixing plate, the cavity plate having a cavity for placing the mold core; a first fixing through hole being provided in the cavity; A mold core located in the cavity, wherein a second fixing through hole is provided in the mold core; Fastener; the fastener is sequentially inserted into the second fixing through hole, the first fixing through hole and the first fixing groove.

[0007] When the mold core needs to be disassembled, simply pull the fastener out of the second fixing through hole, the first fixing through hole, and the first fixing groove to separate the mold core, the cavity plate, and the fixing plate, at which point the mold core can be replaced. When the replaced mold core needs to be installed, simply insert the fastener sequentially into the second fixing through hole, the first fixing through hole, and the first fixing groove, and tighten the fastener to secure the mold core, the cavity plate, and the fixing plate. This application enables rapid mold core replacement with a single fastener, reducing the mold core replacement time from two hours in the prior art to 10 minutes, effectively improving the efficiency of mold core replacement.

[0008] Preferably, a heating component is provided in the fixing plate.

[0009] This application incorporates a heating component within a fixed plate. This heating component can be a heating wire or similar structure, thus the fixed plate functions as a heating plate. The heating plate heats the injection molding liquid inside the cavity, which helps accelerate the injection molding of the workpiece within the cavity. Simultaneously, the heating plate not only supports and bears the load of the cavity plate but also assists in the molding of the workpiece inside the cavity.

[0010] Preferably, when the mold core is fixed inside the cavity, the center of the mold core coincides with the center of the cavity; The first fixing through hole is located on the center line of the mold core; the second fixing through hole is located on the center line of the cavity.

[0011] In this application, the positions of the first and second fixing through holes need to avoid the interior of the mold cavity to prevent interference with the injection-molded workpiece. When the injection molding structure is used to form a symmetrical ring-shaped workpiece, the outer side of the mold core and the inner side of the mold cavity surround the cavity chamber. When the mold core is fixed inside the cavity, the center of the mold core coincides with the center of the cavity. At this time, the first fixing through hole can be set on the center line of the mold core, and the second fixing through hole can be set on the center line of the cavity. In this way, only one first fixing through hole and one second fixing through hole are needed to achieve the fastening of the mold core and the cavity plate without interfering with the workpiece inside the cavity.

[0012] Preferably, the fixing plate is provided with a first positioning component, and the cavity plate is provided with a second positioning component adapted to the first positioning component.

[0013] Before the fixing plate and cavity plate are fastened with fasteners in this application, alignment can be achieved through the adaptation between the first positioning component and the second positioning component to prevent positional misalignment of the fixing plate and cavity plate from affecting the accuracy of the cavity. Specifically, the first positioning component can be a protruding structure on the top of the fixing plate, and the second positioning component can be a recessed structure on the bottom of the cavity plate. Before fastening the fixing plate and cavity plate, the second positioning component and the second positioning component are aligned and placed to ensure that the cavity plate and the fixing plate are fixed in position.

[0014] Preferably, the first fixing through hole, the second fixing through hole, and the first fixing groove are provided with internal threads, and the fastener is provided with external threads that are adapted to the internal threads on its outer side.

[0015] The fasteners in this application can specifically be bolt structures. Furthermore, internal threads adapted to the bolt structure are provided in the first fixing through hole, the second fixing through hole, and the first fixing groove. Fastening is achieved through the threaded structure. When disassembling the mold core, simply loosening the bolt structure is sufficient to separate the mold core and the cavity. When fastening after replacing the mold core, simply tightening the bolt structure is sufficient to secure the mold core and the cavity. The threaded connection further improves the efficiency of disassembling and installing the mold core and cavity plate.

[0016] Preferably, the bottom of the fixing plate is provided with a pin-support plate, and a pin is provided in the pin-support plate. One end of the pin is fixed in the pin-support plate, and the other end of the pin extends through the fixing plate into the cavity. The pin-support plate is connected to a part-removing drive, which can drive the pin-support plate and the pin to move toward or away from the cavity.

[0017] This application features an ejector pin at the bottom of a fixed plate, penetrating the fixed plate and extending into the cavity within the cavity plate. During workpiece injection molding, the ejector pin does not enter the cavity; instead, it remains at the bottom, forming the cavity chamber together with the inner side of the cavity. After injection molding, the workpiece inside the cavity is formed. At this point, the ejector drive pushes the ejector pin and the ejector plate upwards, removing the workpiece from the cavity. In this application, the ejector drive moves the ejector plate and the ejector pin fixed within it synchronously, preventing ejector pin displacement and improving ejection efficiency.

[0018] Preferably, a support plate is provided on the outer side of the abutment plate, the fixing plate is located on the upper surface of the support plate, the height of the support plate is greater than the height of the abutment plate, and the ejector pin is located on the inner side of the support plate; the support plate is fixed in the worktable.

[0019] In this application, the worktable supports the entire injection molding structure. A support plate and an ejector plate are provided on the upper surface of the worktable, with the height of the support plate being greater than that of the ejector plate. The ejector pin and the ejector plate are located inside the support plate, meaning the support plate provides space for the ejector pin and its lifting mechanism. The support plate provides shielding protection for the lifting of the ejector pin and the ejector plate, ensuring that the ejector pin and the ejector plate can move freely between the support plate. Simultaneously, the support plate supports the fixing plate and the cavity plate and mold core above it, ensuring that the ejector pin extends into the cavity under the drive of the part removal driver, preventing the ejector pin from bearing the weight of the fixing plate and the cavity plate.

[0020] Preferably, the abutment plate is located in the worktable, and a guide post is provided between the fixed plate and the abutment plate, with both ends of the guide post fixed in the fixed plate and the worktable respectively; and the guide post is slidably connected to the abutment plate.

[0021] When the part-picking drive moves the ejector pin and the abutment plate up and down, the guide post passes through the abutment plate and is slidably connected to it, ensuring that the part-picking drive moves the abutment plate up and down along the guide post. The guide post in this application provides guidance for the raising and lowering of the abutment plate, ensuring precise raising and lowering of the ejector pin and the abutment plate, preventing vertical positional deviation, and improving the accuracy of the ejector pin movement.

[0022] Preferably, the top of the abutment plate is provided with an ejector plate, and the ejector pin passes through the ejector plate; the part-taking drive can drive the abutment plate, the ejector plate and the ejector pin to move toward or away from the cavity.

[0023] This application incorporates an ejector plate on the abutment plate, with both the ejector pin and guide post penetrating the ejector plate. The ejector plate provides an upper limit for the ejector pin in the horizontal direction. Because the ejector plate contains ejector pin through-holes, it restricts the horizontal displacement of the ejector pin. Simultaneously, the ejector plate is positioned above the abutment plate. During the upward movement of the ejector pin and abutment plate, the ejector plate first contacts the fixed plate, thus limiting the upward position of the ejector pin. By adjusting the thickness of the ejector plate, the maximum upward position of the ejector pin can be limited, ensuring that the workpiece can be smoothly removed from the cavity at this position without consuming excessive upward energy.

[0024] The second objective of this application is to provide a molding die for a stator, including the injection molding structure described above for quick-change of mold cores. By tightening and loosening fasteners, the mold core, cavity plate, and fixing plate can be quickly fastened and disassembled, thereby enabling rapid replacement of mold cores of different sizes and effectively improving the switching efficiency and production efficiency of the injection mold.

[0025] The beneficial effects of this utility model are as follows: This utility model provides an injection molding structure for quick mold core switching, including a fixing plate, a cavity plate, a mold core, and fasteners. The fixing plate has a first fixing groove, and the cavity plate is located on top of the fixing plate, containing a cavity for placing the mold core, and also has a first fixing through hole. The mold core is located in the cavity, and has a second fixing through hole. When the mold core needs to be disassembled, simply pull the fastener out of the second fixing through hole, the first fixing through hole, and the first fixing groove to separate the mold core, cavity plate, and fixing plate, allowing for mold core replacement. When the replaced mold core needs to be installed, simply insert the fastener sequentially into the second fixing through hole, the first fixing through hole, and the first fixing groove, and tighten the fastener to secure the mold core, cavity plate, and fixing plate. This application achieves quick mold core replacement with a single fastener, reducing the mold core switching time from two hours in the prior art to 10 minutes, effectively improving mold core replacement efficiency.

[0026] This application also provides a molding die for a stator, including a quick-change mold core injection structure as described above. By tightening and loosening the fasteners, the fastening and disassembly between the mold core, cavity plate and fixing plate can be quickly realized, thereby realizing the quick replacement of mold cores of different sizes, effectively improving the switching efficiency and production efficiency of the injection die. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the injection molding structure in the embodiments of this application; Figure 2 for Figure 1 A cross-sectional view of the AA surface; Figure 3 This is a schematic diagram of the mold core after it has been tightened in an embodiment of this application; Figure 4 This is a schematic diagram of the assembly of the cavity plate, heating plate and mold core in an embodiment of this application; Figure 5 This is a top view of the cavity plate and mold core in the embodiments of this application; Figure 6 This is a side view of the injection-molded structure in an embodiment of this application; Figure 7 This is an exploded view of the injection-molded structure in an embodiment of this application.

[0028] 1. Mold core; 2. Cavity plate; 3. Fixing plate; 4. Fasteners; 5. Support plate; 6. Ejector plate; 7. Anchor plate; 8. Worktable; 9. Guide pillars. Detailed Implementation

[0029] Preferred embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art.

[0030] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms “a,” “the,” and “the” used in this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0031] It should be understood that although the terms "first," "second," "third," etc., may be used in this invention to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this invention, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] Example 1 like Figures 1-7 As shown, this application provides an injection molding structure for quick mold core switching, comprising: Fixing plate 3, wherein a first fixing groove is provided; A cavity plate 2 is located on top of the fixing plate 3, and a cavity for placing the mold core 1 is provided in the cavity plate 2; a first fixing through hole is provided in the cavity; The mold core 1 is located in the cavity, and the mold core 1 is provided with a second fixing through hole; Fastener 4; the fastener 4 is inserted sequentially into the second fixing through hole, the first fixing through hole and the first fixing groove.

[0033] In this application, the fastener 4 can be a bolt or other component. Correspondingly, the second fixing through hole, the first fixing through hole, and the first fixing groove are provided with internal threads that are compatible with the bolt.

[0034] In this application, the fastener 4 can be provided with a locking element that can expand outward or retract inward. When the fastener 4 is inserted into the second fixing through hole, the first fixing through hole, and the first fixing groove, the locking element expands outward, and the fastener 4 is in an interference fit with the second fixing through hole, the first fixing through hole, and the first fixing groove. When the fastener 4 needs to be removed, the locking element retracts inward, and the fastener 4 is in a clearance fit with the second fixing through hole, the first fixing through hole, and the first fixing groove.

[0035] In this application, the fixing plate 3 can be a heating plate or a support platform, etc., used to support the cavity plate 2. The first fixing groove located in the fixing plate 3 does not need to penetrate the fixing plate 3; it only needs to be set on the upper surface of the fixing plate 3 and cooperate with the first fixing through hole to achieve the fastening of the cavity plate 2 and the fixing plate 3.

[0036] In this application, the positions of the second fixed through hole and the first fixed through hole are matched. Specifically, when the mold core 1 is placed inside the cavity, the first fixed through hole and the second fixed through hole overlap in the vertical direction.

[0037] In this application, the shapes of the first fixing groove, the first fixing through hole, and the second fixing through hole need to be adapted to the fastener 4. When the fastener 4 is a cylindrical structure, the first fixing groove, the first fixing through hole, and the second fixing through hole are all cylindrical structures. When the fastener 4 is a conical or frustum-shaped structure, the structures of the first fixing groove, the first fixing through hole, and the second fixing through hole need to be adapted to the shape of the fastener 4 at the corresponding position.

[0038] This application provides an injection molding structure for quick mold core switching, including a fixing plate 3, a cavity plate 2, a mold core 1, and fasteners 4. The fixing plate 3 is provided with a first fixing groove. The cavity plate 2 is located on top of the fixing plate 3 and is provided with a cavity for placing the mold core 1. The cavity is also provided with a first fixing through hole. The mold core 1 is located in the cavity and is provided with a second fixing through hole. When the mold core 1 needs to be disassembled, simply pull the fastener 4 out of the second fixing through hole, the first fixing through hole, and the first fixing groove to separate the mold core 1, the cavity plate 2, and the fixing plate 3, and then replace the mold core 1. When the replaced mold core 1 needs to be installed, simply insert the fastener 4 into the second fixing through hole, the first fixing through hole, and the first fixing groove in sequence, and tighten the fastener 4 to secure the mold core 1, the cavity plate 2, and the fixing plate 3. This application can achieve rapid replacement of the mold core 1 with a single fastener 4, reducing the mold core replacement time from two hours in the prior art to 10 minutes, effectively improving the efficiency of mold core 1 replacement.

[0039] Example 2 like Figures 1-7 As shown, this application provides an injection molding structure for quick mold core switching, comprising: Fixing plate 3, wherein a first fixing groove is provided; A cavity plate 2 is located on top of the fixing plate 3, and a cavity for placing the mold core 1 is provided in the cavity plate 2; a first fixing through hole is provided in the cavity; The mold core 1 is located in the cavity, and the mold core 1 is provided with a second fixing through hole; Fastener 4; the fastener 4 is inserted sequentially into the second fixing through hole, the first fixing through hole and the first fixing groove.

[0040] Furthermore, a heating component is provided in the fixing plate 3.

[0041] This application incorporates a heating component within the fixed plate 3. This heating component can be a heating wire or similar structure, thus the fixed plate 3 functions as a heating plate. The heating plate heats the injection molding liquid inside the cavity, which helps accelerate the injection molding of the workpiece within the cavity. Simultaneously, the heating plate not only supports and bears the load of the cavity plate 2 but also assists in the molding of the workpiece inside the cavity.

[0042] Furthermore, when the mold core 1 is fixed inside the cavity, the center of the mold core 1 coincides with the center of the cavity; the first fixing through hole is located on the center line of the mold core 1; the second fixing through hole is located on the center line of the cavity.

[0043] In this application, the positions of the first and second fixing through holes need to avoid the interior of the cavity to prevent interference with the injection-molded workpiece. When the injection molding structure is used to form a symmetrical annular workpiece, the outer side of the mold core 1 and the inner side of the cavity form the cavity chamber. When the mold core 1 is fixed inside the cavity, the center of the mold core 1 coincides with the center of the cavity. At this time, the first fixing through hole can be set on the center line of the mold core 1, and the second fixing through hole can be set on the center line of the cavity. In this way, only one first fixing through hole and one second fixing through hole are needed to fasten the mold core 1 and the cavity plate 2 without interfering with the workpiece inside the cavity.

[0044] Furthermore, the fixing plate 3 is provided with a first positioning component, and the cavity plate 2 is provided with a second positioning component that is adapted to the first positioning component.

[0045] Before the fixing plate 3 and the cavity plate 2 are fastened by the fastener 4, alignment can be achieved through the adaptation between the first positioning component and the second positioning component to avoid positional misalignment of the fixing plate 3 and the cavity plate 2 affecting the accuracy of the cavity. Specifically, the first positioning component can be a protruding structure on the top of the fixing plate 3, and the second positioning component can be a recessed structure on the bottom of the cavity plate 2. Before fastening the fixing plate 3 and the cavity plate 2, the second positioning component and the second positioning component are aligned and placed to ensure that the cavity plate 2 and the fixing plate 3 are fixed in position.

[0046] Furthermore, the first fixing through hole, the second fixing through hole, and the first fixing groove are provided with internal threads, and the fastener 4 is provided with external threads that are adapted to the internal threads on its outer side.

[0047] The fastener 4 in this application can specifically be a bolt structure. Furthermore, internal threads adapted to the bolt structure are provided in the first fixing through hole, the second fixing through hole, and the first fixing groove. Fastening is achieved through the threaded structure. When disassembling the mold core 1, simply loosening the bolt structure is sufficient to separate the mold core 1 from the cavity. When fastening after replacing the mold core 1, simply tightening the bolt structure is sufficient to secure the mold core 1 to the cavity. The threaded connection further improves the efficiency of disassembling and installing the mold core 1 and the cavity plate 2.

[0048] Furthermore, a pin-support plate 7 is provided at the bottom of the fixing plate 3, and a ejector pin (not shown in the figure) is provided in the pin-support plate 7. One end of the ejector pin is fixed in the pin-support plate 7, and the other end of the ejector pin extends through the fixing plate 3 into the cavity. The pin-support plate 7 is connected to a part-removing drive, and the part-removing drive can drive the pin-support plate 7 and the ejector pin to move towards or away from the cavity.

[0049] This application provides an ejector pin at the bottom of the fixed plate 3, which penetrates the fixed plate 3 and extends into the cavity of the cavity plate 2. When the workpiece is being injected into the cavity, the ejector pin does not enter the cavity; at this time, the ejector pin is located at the bottom of the cavity, forming a cavity chamber together with the inner side of the cavity. After injection molding is completed, the workpiece inside the cavity is formed. At this time, the part removal drive moves the ejector plate 7 and the ejector pin upwards, pushing the workpiece out of the cavity for easy removal. In this application, the part removal drive moves the ejector plate 7 and the ejector pin fixed in the ejector plate 7 synchronously, which can prevent the ejector pin from shifting during lifting and lowering, thus improving part removal efficiency.

[0050] Furthermore, a support plate 5 is provided on the outer side of the abutment plate 7, the fixing plate 3 is located on the upper surface of the support plate 5, the height of the support plate 5 is greater than the height of the abutment plate 7, and the ejector pin is located on the inner side of the support plate 5; the support plate 5 is fixed in the worktable 8.

[0051] In this application, the worktable 8 is used to support the entire injection molding structure. A support plate 5 and an ejector plate 7 are provided on the upper surface of the worktable 8, and the height of the support plate 5 is greater than the height of the ejector plate 7. The ejector pin and the ejector plate 7 are located inside the support plate 5, that is, the support plate 5 provides space for the ejector pin and its lifting. By setting the support plate 5, a shielding protection effect can be provided for the lifting of the ejector plate 7 and the ejector pin, ensuring that the ejector pin and the ejector plate 7 can lift between the support plate 5. At the same time, the support plate 5 is used to support the fixed plate 3 and the cavity plate 2 and the mold core 1 above it, ensuring that the ejector pin extends into the cavity under the drive of the part removal drive, and avoiding the ejector pin bearing the weight of the fixed plate 3 and the cavity plate 2.

[0052] Furthermore, the needle-supporting plate 7 is located in the worktable 8, and a guide post 9 is provided between the fixing plate 3 and the needle-supporting plate 7. The two ends of the guide post 9 are respectively fixed in the fixing plate 3 and the worktable 8; and the guide post 9 is slidably connected to the needle-supporting plate 7.

[0053] When the part-picking drive moves the ejector pin and the abutment plate 7 up and down, the guide post 9 passes through the abutment plate 7 and is slidably connected to it, ensuring that the part-picking drive moves the abutment plate 7 up and down along the guide post 9. The guide post 9 in this application provides guidance for the raising and lowering of the abutment plate 7, ensuring accurate raising and lowering of the ejector pin and the abutment plate 7, preventing vertical positional deviation, and improving the accuracy of the ejector pin movement.

[0054] Furthermore, the top of the abutment plate 7 is provided with an ejector plate 6, and the ejector pin passes through the ejector plate 6; the part-taking drive can drive the abutment plate 7, the ejector plate 6 and the ejector pin to move toward or away from the cavity.

[0055] This application provides an ejector plate 6 on the ejector plate 7, with both the ejector pin and the guide post 9 penetrating through the ejector plate 6. The presence of the ejector plate 6 provides an upper limit for the ejector pin in the horizontal direction. Since the ejector plate 6 has an ejector pin through hole for the ejector pin to pass through, the presence of the ejector pin through hole can limit the horizontal displacement of the ejector pin. At the same time, the ejector plate 6 is located above the ejector plate 7. During the upward movement of the ejector pin and the ejector plate 7, the ejector plate 6 first abuts against the fixed plate 3, which can limit the upward position of the ejector pin. By setting the thickness of the ejector plate 6, the maximum upward position of the ejector pin can be limited, ensuring that the workpiece can be smoothly removed from the cavity at this position without consuming more upward energy.

[0056] Example 3 like Figures 1-7 As shown, this application provides a quick-change mold core injection molding structure for injection molding a molded stator. The molded stator has a ring-shaped structure.

[0057] The injection molding structure for quick mold core switching in this application includes, from bottom to top, a worktable 8, a support plate 5, a fixing plate 3, and a cavity plate 2. The support plate 5 is located at the edge of the worktable 8. The middle of the worktable 8 is provided with a pin plate 7 and an ejector plate 6 from bottom to top. The bottom of the ejector pin is fixedly connected to the pin plate 7, and the top of the ejector pin passes through the ejector plate 6 and the fixing plate 3 in sequence, extending into the cavity.

[0058] In this application, the worktable 8 can be a support platform or support frame structure as in the prior art. The worktable 8 supports the entire injection molding structure. A support plate 5 and an ejector plate 7 are provided on the upper surface of the worktable 8, and the height of the support plate 5 is much greater than the height of the ejector plate 7. The ejector pin, ejector plate 7, and ejector plate 8 are located inside the support plate 5, meaning the support plate 5 provides space for the ejector pin and its lifting. The support plate 5 ensures that the ejector pin and ejector plate 7 can move up and down between the support plate 5, and also supports the fixing plate 3 and the cavity plate 2 and mold core 1 above it.

[0059] An ejector pin is provided in the ejector plate 7. One end of the ejector pin is fixed in the ejector plate 7, and the other end of the ejector pin passes through the ejector plate 6 and the fixing plate 3, extending into the cavity. The ejector plate 7 is connected to a part-removing drive, which can drive the ejector plate 7, the ejector plate 6, and the ejector pin to move towards or away from the cavity. When the workpiece is being injected into the cavity, the ejector pin does not enter the cavity. At this time, the ejector pin is located at the bottom of the cavity, forming a cavity chamber together with the inner side of the cavity. After the injection molding is completed, the workpiece inside the cavity has been formed. At this time, the part-removing drive drives the ejector plate 7 and the ejector pin to push upward, and the ejector pin pushes out the workpiece inside the cavity, making it easy to remove the workpiece.

[0060] Because the ejector plate 6 has an ejector through hole for the ejector to pass through, the ejector through hole can limit the horizontal displacement of the ejector. At the same time, the ejector plate 6 is located above the abutment plate 7. During the upward movement of the ejector and the abutment plate 7, the ejector plate 6 first abuts against the fixed plate 3, which can limit the upward position of the ejector. By setting the thickness of the ejector plate 6, the maximum upward position of the ejector can be limited, ensuring that the workpiece can be smoothly removed from the cavity at this position without consuming more upward energy.

[0061] A guide post 9 is provided between the fixed plate 3 and the abutment plate 7, with both ends of the guide post 9 fixed in the fixed plate 3 and the worktable 8, respectively; and the guide post 9 is slidably connected to the abutment plate 7. When the part-picking drive moves the ejector pin, ejector plate 6, and abutment plate 7 up and down, the guide post 9 passes through the abutment plate 7 and ejector plate 6 and is slidably connected to the abutment plate 7 and ejector plate 6, ensuring that the part-picking drive moves the abutment plate 7, ejector plate 6, and ejector pin up and down along the guide post 9.

[0062] The fixing plate 3 of this application is provided with a first fixing groove; a heating component is provided in the fixing plate 3, which can be a structure such as an electric heating wire. At this time, the fixing plate 3 is a heating plate. The heating plate is used to heat the injection liquid inside the cavity, which helps to accelerate the injection molding of the workpiece inside the cavity.

[0063] The cavity plate 2 of this application is provided with a cavity for placing the mold core 1; the cavity is provided with a first fixing through hole; the outer side of the mold core 1 and the inner side of the cavity form a cavity chamber. When the mold core 1 is fixed inside the cavity, the center of the mold core 1 and the center of the cavity coincide. At this time, the first fixing through hole can be set on the center line of the mold core 1 and the second fixing through hole can be set on the center line of the cavity. In this way, only one first fixing through hole and one second fixing through hole are needed to achieve the fastening of the mold core 1 and the cavity plate 2, and there will be no interference with the workpiece inside the cavity.

[0064] In this application, a first fastening component is provided at the bottom of the fixing plate 3, and a second fastening component is provided at the top of the cavity plate 2. Specifically, the first positioning component can be a protruding structure provided at the top of the fixing plate 3, and the second positioning component can be a recessed structure provided at the bottom of the cavity plate 2. Before fastening the fixing plate 3 and the cavity plate 2, the second positioning component and the second positioning component are aligned and placed to ensure that the cavity plate 2 and the fixing plate 3 are fixed in position.

[0065] The mold core 1 of this application is provided with a second fixing through hole; In this application, the fastener 4 can specifically be a bolt structure. Furthermore, internal threads adapted to the bolt structure are provided in the first fixing through hole, the second fixing through hole, and the first fixing groove. Fastening is achieved through the threaded structure. When disassembling the mold core 1, simply loosening the bolt structure is sufficient to separate the mold core 1 from the cavity. When fastening after replacing the mold core 1, simply tightening the bolt structure is sufficient to secure the mold core 1 to the cavity.

[0066] The working principle of the injection molding structure for rapid core switching in this embodiment is as follows: During the initial assembly stage of the injection molded structure, the dimensional accuracy and surface quality of the mold core 1, cavity plate 2 and fixing plate 3 are confirmed, and impurities and oil stains on the mounting surfaces of each component are cleaned to avoid affecting the assembly stability.

[0067] The cavity plate 2 is placed stably on the fixed plate 3. The first positioning combination and the second positioning component ensure that the relative positions of the two are accurate, providing a stable base for the installation of the mold core 1.

[0068] Align the mold core 1 with the first fixing through hole of the cavity plate 2 from the front of the mold, so that the second fixing through hole of the mold core 1 overlaps with the axis of the first fixing through hole in the cavity plate 2 and the first fixing groove in the fixing plate 3. Insert the bolt structure and tighten the bolt structure with the help of tools such as wrenches to complete the initial fixing of the mold core 1. The whole process is simple and efficient.

[0069] During the mold core 1 replacement stage, when production needs change and different specifications of mold core 1 need to be replaced, the mold operation is stopped and the mold temperature, pressure and other parameters are restored to a safe range, such as when the fixing plate 3 cools down to a suitable operating temperature.

[0070] Disassembling the old mold core: From the front of the mold, use appropriate tools, such as wrenches and bolt removers, to loosen and remove the bolt structure that secures the old mold core. Since the bolt structure only connects the mold core 1 to the cavity plate 2 and the fixing plate 3 from the front, without interference from other complex structures, the old mold core can be easily removed directly from the front after the bolts are removed. There is no need to disassemble the cavity plate 2 and the fixing plate 3, or other surrounding components. The entire process is short, requiring only 5-8 minutes for tool operation and mold core 1 removal.

[0071] Install the new mold core: Clean any remaining debris from the cavity of the cavity plate 2. Take the new mold core, align it with the installation position from the front, insert the new mold core and adjust its position so that the center lines of the first fixing through hole, the second fixing through hole and the first fixing groove are aligned. Insert the bolt structure and tighten it slowly. During the process, use tools such as dial indicators and feeler gauges to monitor parameters such as the fit and coaxiality between the mold core 1 and the cavity plate 2 to ensure the installation accuracy of the mold core 1. Tighten the bolt structure to fix it. This step takes about 2-4 minutes. The entire replacement process takes about 10 minutes, which is much shorter than the traditional replacement time of 2-3 hours.

[0072] Mold operation verification stage: First, parameter debugging is carried out: After the mold core 1 is replaced, the mold is started, and the process parameters such as temperature, injection pressure, and clamping force in the fixing plate 3 are adjusted to match the molding requirements of the new mold core.

[0073] Next, trial production and testing are conducted: small-batch trial production is carried out, and the dimensional accuracy and surface quality of the molded products are checked using dimensional measuring tools. If deviations are found, the process parameters or the installation accuracy of mold core 1 are fine-tuned until the product quality meets the standards, ensuring stable and efficient mold operation. Since mold core 1 can be easily operated from the front in this embodiment, the difficulty of fine-tuning is lower than that in existing technologies.

[0074] This application also provides a molding die for a stator, including a quick-change mold core injection structure as described above. By tightening and loosening the fasteners, the fastening and disassembly between the mold core, cavity plate and fixing plate can be quickly realized, thereby realizing the quick replacement of mold cores of different sizes, effectively improving the switching efficiency and production efficiency of the injection die.

[0075] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings. In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0076] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0077] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application. The above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. For those skilled in the art, this utility model can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. An injection molding structure for rapid core switching, characterized in that, include: A fixing plate (3) is provided with a first fixing groove; A cavity plate (2) is located on top of the fixing plate (3), and a cavity for placing the mold core (1) is provided in the cavity plate (2); a first fixing through hole is provided in the cavity; The mold core (1) is located in the cavity, and the mold core (1) is provided with a second fixing through hole; Fastener (4); The fastener (4) is inserted sequentially into the second fixing through hole, the first fixing through hole and the first fixing groove.

2. The injection molding structure for rapid mold core switching according to claim 1, characterized in that, A heating component is provided in the fixing plate (3).

3. The injection molding structure for quick mold core switching according to claim 1, characterized in that, When the mold core (1) is fixed inside the cavity, the center of the mold core (1) coincides with the center of the cavity; The first fixing through hole is located on the center line of the mold core (1); the second fixing through hole is located on the center line of the cavity.

4. The injection molding structure for quick mold core switching according to claim 1, characterized in that, The fixing plate (3) is provided with a first positioning component, and the cavity plate (2) is provided with a second positioning component that is adapted to the first positioning component.

5. The injection molding structure for quick mold core switching according to claim 1, characterized in that, The first fixing through hole, the second fixing through hole and the first fixing groove are provided with internal threads, and the fastener (4) is provided with external threads that are adapted to the internal threads on the outside.

6. The injection molding structure for quick mold core switching according to claim 1, characterized in that, The bottom of the fixing plate (3) is provided with a pin plate (7), and a ejector pin is provided in the pin plate (7). One end of the ejector pin is fixed in the pin plate (7), and the other end of the ejector pin extends through the fixing plate (3) into the cavity. The pin plate (7) is connected to a part-removing drive, which can drive the pin plate (7) and the ejector pin to move toward or away from the cavity.

7. The injection molding structure for quick mold core switching according to claim 6, characterized in that, A support plate (5) is provided on the outer side of the abutment plate (7), and the fixing plate (3) is located on the upper surface of the support plate (5). The height of the support plate (5) is greater than the height of the abutment plate (7), and the ejector pin is located on the inner side of the support plate (5). The support plate (5) is fixed in the worktable (8).

8. The injection molding structure for quick mold core switching according to claim 6, characterized in that, The abutment plate (7) is located in the worktable (8), and a guide post (9) is provided between the fixing plate (3) and the abutment plate (7). The two ends of the guide post (9) are respectively fixed in the fixing plate (3) and the worktable (8); and the guide post (9) is slidably connected to the abutment plate (7).

9. The injection molding structure for quick-changing mold cores according to claim 6, characterized in that, The top of the abutment plate (7) is provided with an ejector plate (6), and the ejector pin passes through the ejector plate (6); the part removal drive can drive the abutment plate (7), the ejector plate (6) and the ejector pin to move toward or away from the cavity.

10. A molding die for a plastic-sealed stator, characterized in that, The injection molding structure includes a quick-change mold core as described in any one of claims 1-9.

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