Threaded core-pulling molding die

Abstract

The utility model relates to mould technical field, specifically disclose a thread core-pulling forming die, including thread core-pulling assembly, including drive gear structure, first thread core-pulling structure and second thread core-pulling structure, first thread core-pulling structure with second thread core-pulling structure opposite setting drive gear structure left and right sides, ejection assembly, including the first ejection assembly of first thread core-pulling structure and second thread core-pulling structure, the needle structure of setting on the first top plate structure, the second top plate structure and drive structure of interlaced setting below the first top plate structure. The utility model is interlaced with thread core-pulling assembly and ejection assembly in, and the overall layout is compact, saves mould space, reduces production cost.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a threaded core-pulling mold. Background Technology

[0002] In modern manufacturing, molds are key tools for achieving efficient product production, widely used in the molding and processing of materials such as plastics and metals. Through precise cavity design, molds process raw materials into products with specific shapes and dimensions; their structure and design directly affect product quality and production efficiency. For example... Figure 1 When a product has a special threaded structure 41, the traditional mold opening direction often interferes with the forming direction of the thread, making direct demolding impossible. Simultaneously, the product design may include a fan-shaped structure 42, whose geometry is prone to sticking during molding, necessitating an effective ejection structure to ensure smooth product ejection from the cavity. However, the internal space of the mold is limited, especially in complex product designs. How to rationally arrange the ejection structure within this limited space becomes a major challenge in mold design. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a threaded core-pulling mold, in which threaded core-pulling components and ejection components are arranged alternately inside, resulting in a compact overall layout, saving mold space, and reducing production costs.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A threaded core-pulling mold, comprising:

[0006] The mold core assembly, lower mold assembly, and base plate are arranged sequentially from top to bottom;

[0007] The threaded core-pulling assembly includes a drive gear structure disposed on the base plate, a first threaded core-pulling structure meshing with the drive gear structure, and a second threaded core-pulling structure meshing with the drive gear structure. The first threaded core-pulling structure and the second threaded core-pulling structure are disposed opposite to each other on the left and right sides of the drive gear structure and extend upward into the mold core assembly. Both the first threaded core-pulling structure and the second threaded core-pulling structure are used for the threaded structure of the molded product.

[0008] The ejection assembly includes a first top plate structure connecting the first threaded core pulling structure and the second threaded core pulling structure, an ejector pin structure disposed on the first top plate structure for ejecting the fan-shaped portion of the product, a second top plate structure disposed alternately below the first top plate structure, and a drive structure for pushing the second top plate structure to move up and down, the second top plate structure being disposed above the drive gear structure.

[0009] According to some embodiments of the present invention, the drive gear structure includes a first threaded rod fixed at its bottom to the base plate, a first threaded sleeve disposed on the lower mold assembly, and a drive gear fixed to the outside of the first threaded sleeve. The first threaded rod is threadedly connected to the first threaded sleeve. When the mold is opened, the lower mold assembly can move up relative to the base plate, and the first threaded sleeve rotates and moves up relative to the first threaded rod, so that the drive gear rotates.

[0010] According to some embodiments of the present invention, both the first threaded core-pulling structure and the second threaded core-pulling structure include a second threaded rod disposed on the lower mold assembly, a driven gear fixed on the second threaded rod, a second threaded sleeve fixed on the lower mold assembly, and a thread forming part disposed on the top of the second threaded rod. The second threaded rod is threadedly connected to the second threaded sleeve, and the driven gear meshes with the driving gear. The driving gear rotates to drive the driven gear to rotate, thereby causing the second threaded rod to rotate and move downward relative to the second threaded sleeve, so that the thread forming part rotates and moves downward to demold.

[0011] According to some embodiments of the present invention, the second threaded rod is provided with an arc-shaped insert for assisting in forming the thread structure of the product, the base plate is provided with a limiting block for limiting the displacement of the arc-shaped insert, and the bottom of the arc-shaped insert has a limiting stop block horizontally disposed below the limiting block.

[0012] According to some embodiments of the present invention, the bottom of the first top plate structure is provided with a first fixing plate sleeved on the outside of the first threaded core pulling structure and a second fixing plate sleeved on the outside of the second threaded core pulling structure. Both the first fixing plate and the second fixing plate are used to fix the pin structure. One side of the first top plate structure and the first fixing plate are provided with a first sliding groove that matches the shape of the first threaded core pulling structure, and the other side of the first top plate structure and the second fixing plate are provided with a second sliding groove that matches the shape of the second threaded core pulling structure.

[0013] According to some embodiments of the present invention, the first top plate structure and the second top plate structure are arranged perpendicularly to each other, and the bottom of the second top plate structure is provided with a clearance groove for accommodating the first threaded rod.

[0014] According to some embodiments of the present invention, the driving structure includes a push rod disposed on the base plate and a reset spring structure disposed above the second top plate structure. The push rod is used to push the second top plate structure to move up and down. The push rod is disposed on the front and rear sides of the driving gear structure. The bottom of the reset spring structure abuts against the second top plate structure, and the top of the reset spring structure abuts against the bottom of the mold core assembly.

[0015] According to some embodiments of the present invention, the ejection assembly further includes a limiting structure for limiting the movement distance of the second top plate structure.

[0016] According to some embodiments of the present invention, the limiting structure includes a contact plate disposed on one side of the second top plate structure and a micro switch fixed on the outside of the lower mold assembly. When the mold is closed, the second top plate structure can drive the contact plate to move downward. When the contact plate triggers the micro switch, the second top plate structure reaches a preset position.

[0017] This utility model has at least the following beneficial effects:

[0018] The drive gear structure meshes with the first and second threaded core-pulling structures to ensure synchronous and stable core-pulling action, effectively avoid thread damage, and improve molding efficiency. The ejection assembly adopts a staggered top plate design to avoid the threaded core-pulling assembly, make reasonable use of space, and has a compact overall layout, saving mold space, reducing production costs, avoiding interference with the core-pulling assembly, ensuring mold reliability, and extending service life. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the product structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of one embodiment of the present utility model;

[0021] Figure 3 For along Figure 2 A cross-sectional view of the BB line;

[0022] Figure 4 For along Figure 2 A cross-sectional view along line AA;

[0023] Figure 5 This is a schematic diagram of the threaded core-pulling assembly and ejection assembly according to an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of a threaded core-pulling assembly according to an embodiment of the present invention;

[0025] Figure 7 This is a bottom view of one embodiment of the present invention;

[0026] Figure 8 For along Figure 7 A cross-sectional view of the CC line. Detailed Implementation

[0027] This invention provides the following description with reference to the accompanying drawings to aid in a comprehensive understanding of the various embodiments of the invention as defined by the claims and their equivalents. The description includes various specific details to aid understanding, but these details should be considered exemplary only. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of the invention.

[0028] In the description of this utility model, the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying 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 element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] It should be understood that when one element (e.g., the first element) is “connected” to another element (e.g., the second element), the element may be directly connected to the other element, or there may be an intermediary element (e.g., the third element) between the element and the other element.

[0030] An embodiment of this utility model provides a threaded core-pulling forming mold, such as... Figure 1-8 As shown, it includes:

[0031] The mold core assembly (11), the lower mold assembly (12), and the base plate (13) are arranged sequentially from top to bottom.

[0032] The threaded core-pulling assembly (2) includes a drive gear structure (201) disposed on the base plate (13), a first threaded core-pulling structure (202) meshing with the drive gear structure (201), and a second threaded core-pulling structure (203) meshing with the drive gear structure (201). The first threaded core-pulling structure (202) and the second threaded core-pulling structure (203) are disposed opposite to each other on the left and right sides of the drive gear structure (201) and extend upward into the mold core assembly (11). Both the first threaded core-pulling structure (202) and the second threaded core-pulling structure (203) are used for the threaded structure (41) of the molded product.

[0033] The ejection assembly (3) includes a first top plate structure (301) connecting the first threaded core pulling structure (202) and the second threaded core pulling structure (203), an ejector pin structure (302) disposed on the first top plate structure (301) for ejecting the fan-shaped part (42) of the product, a second top plate structure (303) disposed alternately below the first top plate structure (301), and a drive structure (304) for pushing the second top plate structure (303) to move up and down. The second top plate structure (303) is disposed above the drive gear structure (201).

[0034] The mold core assembly (11), lower mold assembly (12), and base plate (13) are arranged sequentially from top to bottom, and the structure facilitates layered mold opening. The drive gear structure (201) of the threaded core-pulling assembly (2) can rotate by mutual rotation through threaded connection driven by the mold opening force, as in this embodiment, or it can be driven by an additional motor through a chain, belt, or other means. The drive gear structure (201) meshes with the two threaded core-pulling structures, ensuring the synchronization and stability of the core-pulling action. During the mold opening process, the threaded core can rotate and retract precisely, avoiding damage to the threaded structure (41). The first threaded core-pulling structure (202) and the second threaded core-pulling structure (203) are arranged opposite each other on the left and right sides of the drive gear structure (201) for molding products. The double threaded core-pulling structure improves molding efficiency. When the drive gear structure (201) rotates, it can simultaneously drive the first threaded core-pulling structure (202) and the second threaded core-pulling structure (203) to rotate. The distance of its rotation is consistent with the distance of the internal thread of the product, and it drives the product synchronously. To address the issue of the fan-shaped portion 42 of the product easily sticking to the mold, a dedicated ejector pin structure (302) is designed. The ejector pins can precisely act on the fan-shaped portion 42, ensuring its smooth demolding and avoiding surface defects caused by sticking. The first top plate structure (301) of the ejector assembly (3) connects the first threaded core-pulling structure (202) and the second threaded core-pulling structure (203). The bottom is staggered with the second top plate structure (303), which avoids the space of the threaded core-pulling assembly (2). The driving structure (304) can be an ejector plate or a machine ejector roller, etc. The user lifts the second top plate structure (303) upward, which in turn drives the first top plate structure (301) upward, and at the same time pushes each ejector pin structure (302) upward, so that the fan-shaped portion 42 of the product is demolded. This not only achieves the ejection of the product, but also makes reasonable use of the staggered space and avoids interference with the threaded core-pulling assembly (2). The driving structure (304) also has a reset function while pushing the ejection. The compact spatial layout enables efficient arrangement within the limited mold space, saving mold space and reducing the overall cost of the mold.

[0035] In some embodiments, such as Figure 3-6 As shown, the drive gear structure (201) includes a first threaded rod (204) with its bottom fixed on the base plate (13), a first threaded sleeve (205) disposed on the lower mold assembly (12), and a drive gear (206) fixed on the outside of the first threaded sleeve (205). The first threaded rod (204) is threadedly connected to the first threaded sleeve (205). When the mold is opened, the lower mold assembly (12) can move upward relative to the base plate (13), and the first threaded sleeve (205) rotates upward relative to the first threaded rod (204) so ​​that the drive gear (206) rotates.

[0036] The drive gear structure (201) is cleverly linked by a first threaded rod (204) fixed to the bottom plate (13), a first threaded sleeve (205) set on the lower mold assembly (12), and a drive gear (206) fixed to the outside of the first threaded sleeve (205). Specifically, the bottom of the first threaded rod (204) is fixed to the bottom plate (13), and it also has a stop and other structures to limit its rotation. The first threaded rod (204) is threadedly connected to the first threaded sleeve (205), and the first threaded sleeve (205) is restricted inside the lower mold assembly (12). When the mold is opened, the lower mold assembly (12) moves upward relative to the bottom plate (13), which drives the first threaded sleeve (205) to rotate and move upward relative to the first threaded rod (204). The first threaded sleeve (205) has a threaded structure (41) inside, and the first threaded rod (204) has a threaded structure (41) outside. With a threaded structure (41), the relative displacement of the two drives the first threaded sleeve (205) to rotate through the threaded rotation, thereby driving the drive gear (206) fixed on the first threaded sleeve (205) to rotate, so as to drive the first threaded core pulling structure (202) and the second threaded core pulling structure (203) to rotate. This structure makes full use of the mold opening force to achieve automatic drive without the need for an additional power device. The structure is simple and efficient, reducing the complexity and cost of the mold, while ensuring the accuracy and synchronization of the threaded core pulling action, improving the reliability and molding accuracy of the mold.

[0037] Furthermore, such as Figure 3 , 5As shown in Figures 6 and 7, both the first threaded core-pulling structure (202) and the second threaded core-pulling structure (203) include a second threaded rod (207) disposed on the lower mold assembly (12), a driven gear (208) fixed on the second threaded rod (207), a second threaded sleeve (209) fixed on the lower mold assembly (12), and a thread forming part (210) disposed on the top of the second threaded rod (207). The second threaded rod (207) is threadedly connected to the second threaded sleeve (209), and the driven gear (208) meshes with the driving gear (206). The driving gear (206) rotates to drive the driven gear (208) to rotate, thereby causing the second threaded rod (207) to rotate and move downward relative to the second threaded sleeve (209), so that the thread forming part (210) rotates and moves downward to demold.

[0038] Both the first threaded core-pulling structure (202) and the second threaded core-pulling structure (203) can move upward relative to the base plate (13) with the lower mold assembly (12). The second threaded rod (207) is set on the lower mold assembly (12), and the driven gear (208) is fixed on the second threaded rod (207). When the lower mold assembly (12) and the base plate (13) open the mold, the driving gear (206) rotates, and the driven gear (208) meshes with the driving gear (206) and rotates, thereby driving the second threaded rod (207) fixed with the driven gear (208) to rotate. The second threaded sleeve (209) is fixed on the lower mold assembly (12), wherein the second threaded rod (207) is threadedly connected to the second threaded sleeve (209). The second threaded sleeve (209) has a threaded structure (41) inside, and the second threaded rod (207) has a threaded structure (41) outside. When the second threaded rod (207) rotates, the second threaded sleeve (209) is fixed. The two rotate through the threaded rotation, causing the second threaded rod (207) to rotate and move downward relative to the second threaded sleeve (209), thereby realizing the rotation and downward movement of the thread forming part (210) for demolding. This design makes full use of gear meshing transmission to ensure the precise synchronization of the thread core pulling action, effectively avoid thread damage, and improve the product forming quality.

[0039] Furthermore, such as Figure 7-8 As shown, the second threaded rod (207) is provided with an arc-shaped insert (211) for assisting in forming the thread structure (41) of the product. The base plate (13) is provided with a limiting block (212) for limiting the displacement of the arc-shaped insert (211). The bottom of the arc-shaped insert (211) has a limiting stop (213) horizontally arranged below the limiting block (212).

[0040] like Figure 1The product shown has an arc-shaped groove 43 at the bottom of the thread structure (41). This groove affects the thread unscrewing of the product. An arc-shaped insert (211) is specially set for molding and separate demolding to improve the molding quality and accuracy of the thread. At the same time, the base plate (13) is provided with a limiting block (212) to limit the displacement of the arc-shaped insert (211). With the limiting block (213) at the bottom of the arc-shaped insert (211), the arc-shaped insert (211) is limited to one side of the limiting block (212). This can effectively prevent the arc-shaped insert (211) from moving upward with the second thread rod (207) when the lower mold assembly (12) and the base plate (13) are separated. This ensures that the product can be demolded downward relative to the lower mold assembly (12) and the base plate (13) when they are separated. The arc-shaped groove 43 is demolded first and does not affect the unscrewing of the thread structure (41).

[0041] Furthermore, such as Figure 3 , 5 As shown, the bottom of the first top plate structure (301) is provided with a first fixing plate (306) sleeved on the outside of the first threaded core pulling structure (202) and a second fixing plate (307) sleeved on the outside of the second threaded core pulling structure (203). The first fixing plate (306) and the second fixing plate (307) are both used to fix the pin structure (302). The first top plate structure (301) and the first fixing plate (306) are provided with a first sliding groove (308) that matches the shape of the first threaded core pulling structure (202). The other side of the first top plate structure (301) and the second fixing plate (307) are provided with a second sliding groove (309) that matches the shape of the second threaded core pulling structure (203).

[0042] The bottom of the first top plate structure (301) is provided with a first fixing plate (306) sleeved on the outside of the first threaded core pulling structure (202) and a second fixing plate (307) sleeved on the outside of the second threaded core pulling structure (203), which provides stable support for the ejector pin structure (302). The first fixing plate (306) and the second fixing plate (307) clamp their respective ejector pin structures (302) at the bottom of the first top plate structure (301). The first top plate structure (301) is provided with a first sliding groove (308) and a second sliding groove (309) on both sides, which match the shape of the first threaded core pulling structure (202) and the second threaded core pulling structure (203). During the movement of the first top plate structure (301), it can slide along the first threaded core pulling structure (202) and the second threaded core pulling structure (203), which has a certain guiding effect, improves the ejection stability of the ejector pin structure (302), ensures the smooth demolding of the fan-shaped part 42, avoids the sticking phenomenon, and improves the surface quality and demolding efficiency of the product. The overall structural design is reasonable and makes full use of space.

[0043] Furthermore, such as Figure 4-5 As shown, the first top plate structure (301) and the second top plate structure (303) are arranged perpendicular to each other, and the bottom of the second top plate structure (303) is provided with a relief groove (310) for accommodating the first threaded rod (204).

[0044] The first top plate structure (301) and the second top plate structure (303) are arranged perpendicularly to each other. This staggered layout makes reasonable use of the internal space of the mold, avoids interference between the top plates, and ensures the smoothness and stability of the ejection action. At the same time, the bottom of the second top plate structure (303) is provided with a relief groove (310), which effectively avoids the second top plate from colliding with the first threaded rod (204) during the up and down movement, further compressing the mold space while ensuring the normal operation of the threaded core pulling assembly (2), and achieving an efficient functional layout in a limited space.

[0045] Furthermore, such as Figure 4-5 As shown, the drive structure (304) includes a push rod (311) disposed on the base plate (13) and a reset spring structure (312) disposed above the second top plate structure (303). The push rod (311) is used to push the second top plate structure (303) to move up and down. The push rod (311) is disposed on the front and rear sides of the drive gear structure (201). The bottom of the reset spring structure (312) abuts against the second top plate structure (303), and the top abuts against the bottom of the mold core assembly (11).

[0046] The ejector pin (311) is lifted by the ejector plate or, as in this embodiment, directly by the ejector roller, thereby pushing the second ejector plate structure (303) to ensure the stability and reliability of the ejection action. At the same time, the reset spring structure (312) can push the second ejector plate structure (303) to reset after the ejection action is completed. The ejector pin (311) is set on the front and rear sides of the drive gear structure (201), avoiding interference between the ejection assembly (3) and the first threaded core pulling structure (202) and the second threaded core pulling structure (203), making reasonable use of the space inside the mold, ensuring that the components work together, and improving the overall performance and service life of the mold.

[0047] In some embodiments, such as Figure 2 , 4 As shown, the ejection assembly (3) also includes a limiting structure (305) for limiting the movement distance of the second top plate structure (303).

[0048] The limiting structure (305) prevents the drive structure (304) from displacing excessively, precisely controls the movement distance of the second top plate structure (303), avoids excessive ejection force leading to product damage or mold deformation, and improves the reliability and service life of the mold.

[0049] Furthermore, such as Figure 2 , 4 As shown, the limiting structure (305) includes a touch plate (313) disposed on one side of the second top plate structure (303) and a micro switch (314) fixed on the outside of the lower mold assembly (12). When the mold is closed, the second top plate structure (303) can drive the touch plate (313) to move downward. When the touch plate (313) triggers the micro switch (314), the second top plate structure (303) reaches the preset position.

[0050] By cooperating with the contact plate (313) and the micro switch (314), precise control of the movement distance of the second top plate structure (303) is achieved. When the mold is closed, the ejector rod (311) pulls the second top plate structure (303) downward, and the contact plate (313) descends accordingly. When the contact plate (313) triggers the micro switch (314), the second top plate structure (303) reaches the preset position, ensuring the accuracy of the reset action, avoiding collision between the second top plate structure (303) and the first threaded rod (204), and improving the reliability of the mold and the quality of the product.

[0051] The terms and words used in the foregoing description and claims are not limited to their literal meaning, but are merely used by the applicant to enable a clear and consistent understanding of the present invention. Therefore, those skilled in the art should understand that the foregoing description of various embodiments of the present invention is for illustrative purposes only, and not intended to limit the present invention as defined by the appended claims and their equivalents.

Claims

1. A threaded core-pulling mold, characterized in that, include: The mold core assembly (11), the lower mold assembly (12), and the base plate (13) are arranged sequentially from top to bottom. The threaded core-pulling assembly (2) includes a drive gear structure (201) disposed on the base plate (13), a first threaded core-pulling structure (202) meshing with the drive gear structure (201), and a second threaded core-pulling structure (203) meshing with the drive gear structure (201). The first threaded core-pulling structure (202) and the second threaded core-pulling structure (203) are disposed opposite to each other on the left and right sides of the drive gear structure (201) and extend upward into the mold core assembly (11). Both the first threaded core-pulling structure (202) and the second threaded core-pulling structure (203) are used for the threaded structure (41) of the molded product. The ejection assembly (3) includes a first top plate structure (301) connecting the first threaded core pulling structure (202) and the second threaded core pulling structure (203), an ejector pin structure (302) disposed on the first top plate structure (301) for ejecting the fan-shaped part (42) of the product, a second top plate structure (303) disposed alternately below the first top plate structure (301), and a drive structure (304) for pushing the second top plate structure (303) to move up and down. The second top plate structure (303) is disposed above the drive gear structure (201).

2. The threaded core-pulling mold according to claim 1, characterized in that: The drive gear structure (201) includes a first threaded rod (204) fixed at the bottom on the base plate (13), a first threaded sleeve (205) disposed on the lower mold assembly (12), and a drive gear (206) fixed on the outside of the first threaded sleeve (205). The first threaded rod (204) is threadedly connected to the first threaded sleeve (205). When the mold is opened, the lower mold assembly (12) can move upward relative to the base plate (13), and the first threaded sleeve (205) rotates upward relative to the first threaded rod (204) so ​​that the drive gear (206) rotates.

3. The threaded core-pulling mold according to claim 2, characterized in that: Both the first threaded core-pulling structure (202) and the second threaded core-pulling structure (203) include a second threaded rod (207) disposed on the lower mold assembly (12), a driven gear (208) fixed on the second threaded rod (207), a second threaded sleeve (209) fixed on the lower mold assembly (12), and a thread forming part (210) disposed on the top of the second threaded rod (207). The second threaded rod (207) is threadedly connected to the second threaded sleeve (209), and the driven gear (208) meshes with the drive gear (206). The drive gear (206) rotates to drive the driven gear (208) to rotate, thereby causing the second threaded rod (207) to rotate and move downward relative to the second threaded sleeve (209), so that the thread forming part (210) rotates and moves downward to demold.

4. The threaded core-pulling mold according to claim 3, characterized in that: The second threaded rod (207) is provided with an arc-shaped insert (211) for assisting in forming the thread structure (41) of the product. The base plate (13) is provided with a limiting block (212) for limiting the displacement of the arc-shaped insert (211). The bottom of the arc-shaped insert (211) has a limiting stop (213) horizontally arranged below the limiting block (212).

5. A threaded core-pulling mold according to claim 2, characterized in that: The bottom of the first top plate structure (301) is provided with a first fixing plate (306) sleeved on the outside of the first threaded core pulling structure (202) and a second fixing plate (307) sleeved on the outside of the second threaded core pulling structure (203). The first fixing plate (306) and the second fixing plate (307) are both used to fix the pin structure (302). The first top plate structure (301) and the first fixing plate (306) are provided with a first sliding groove (308) that matches the shape of the first threaded core pulling structure (202). The other side of the first top plate structure (301) and the second fixing plate (307) are provided with a second sliding groove (309) that matches the shape of the second threaded core pulling structure (203).

6. A threaded core-pulling mold according to claim 5, characterized in that: The first top plate structure (301) and the second top plate structure (303) are arranged perpendicular to each other, and the bottom of the second top plate structure (303) is provided with a relief groove (310) for accommodating the first threaded rod (204).

7. A threaded core-pulling mold according to claim 5, characterized in that: The drive structure (304) includes a push rod (311) disposed on the base plate (13) and a reset spring structure (312) disposed above the second top plate structure (303). The push rod (311) is used to push the second top plate structure (303) to move up and down. The push rod (311) is disposed on the front and rear sides of the drive gear structure (201). The bottom of the reset spring structure (312) abuts against the second top plate structure (303), and the top abuts against the bottom of the mold core assembly (11).

8. A threaded core-pulling mold according to claim 1, characterized in that: The ejection assembly (3) also includes a limiting structure (305) for limiting the movement distance of the second top plate structure (303).

9. A threaded core-pulling mold according to claim 8, characterized in that: The limiting structure (305) includes a touch plate (313) disposed on one side of the second top plate structure (303) and a micro switch (314) fixed on the outside of the lower mold assembly (12). When the mold is closed, the second top plate structure (303) can drive the touch plate (313) to move downward. When the touch plate (313) triggers the micro switch (314), the second top plate structure (303) reaches the preset position.

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