An inner core-pulling structure and an injection mold

Abstract

The application provides an inner core-pulling structure and an injection mold. The inner core-pulling structure comprises a sliding part, a first forming part and a second forming part. The sliding part generates a reciprocating sliding direction. The first forming part is vertically and telescopically connected with the sliding part. The second forming part is vertically and telescopically connected with the sliding part and is oppositely arranged with the first forming part in a thickness direction, which is perpendicular to the reciprocating sliding direction. The first forming part and the second forming part are respectively at least partially accommodated in the sliding part and are arranged to overlap each other in the thickness direction. The thickness of the inner core-pulling structure is less than the sum of the thicknesses of the first forming part and the second forming part. The compactness is improved by the above structure.

Description

Technical Field

[0001] This application relates to the field of cigarette holder injection molding, and more particularly to an internal core-pulling structure and injection mold. Background Technology

[0002] In the field of injection molding, when there is an undercut structure inside the plastic part that is inconsistent with the mold opening direction, an internal core-pulling mechanism must be used to achieve demolding.

[0003] However, as product design trends towards high integration and thinness, such as cigarette holders, complex structures requiring simultaneous molding of undercuts on both sides at the same level within the plastic part have emerged. Faced with this requirement, the limitations of traditional technologies are clearly exposed. Since the first and second inclined ejector mechanisms 110 and 120 need to be installed and moved independently, to avoid mutual interference, their only possible layout is to arrange them side-by-side within the mold (e.g., ...). Figure 1 and Figure 2 This directly resulted in a structure that occupied a large space and had a narrow, isolated mold core 130 machined in the middle to separate and guide the two mechanisms. During the high-pressure, high-temperature injection molding process, the huge injection pressure and clamping force will continuously act on this narrow mold core, which can easily lead to elastic deformation, fatigue cracking, or even breakage.

[0004] Therefore, a compact internal core-pulling structure and injection mold are needed. Utility Model Content

[0005] In view of this, it is necessary to provide a compact internal core-pulling structure and injection mold to solve the above problems.

[0006] Embodiments of this application provide an internal core-pulling structure, including: The sliding component generates a reciprocating sliding direction; The first molded component is perpendicular to the sliding component and is telescopically connected; The second molded part is perpendicular to and telescopically connected to the sliding part, and is disposed opposite to the first molded part in the thickness direction, the thickness direction being perpendicular to the reciprocating sliding direction; The first molded part and the second molded part are respectively at least partially accommodated in the sliding part and are arranged to overlap with the sliding part in the thickness direction. The thickness of the inner core pulling structure is less than the sum of the thicknesses of the first molded part and the second molded part.

[0007] In at least one embodiment of this application, the first molded part and the second molded part have the same structure.

[0008] In at least one embodiment of this application, both the first molded part and the second molded part have: The first receiving groove, the two first receiving grooves are arranged opposite each other in the thickness direction, and wrap around the sliding member; The second receiving groove is arranged adjacent to the first receiving groove and accommodates and fits another molded part. The two second receiving grooves are arranged opposite each other in the thickness direction.

[0009] In at least one embodiment of this application, the first molded part, the second molded part, and the sliding part completely overlap in the thickness direction; The thickness of the first molded part is equal to the thickness of the second molded part; The thickness of the inner core-pulling structure is equal to the thickness of the first molded part.

[0010] In at least one embodiment of this application, the second molded part is attached to the first molded part and located on the same horizontal line.

[0011] In at least one embodiment of this application, the slider includes: The first inclined surface is set along the reciprocating sliding direction, and the two oppositely set first inclined surfaces are respectively attached to the two first receiving grooves for telescopic connection; A vertical surface, facing away from the first inclined surface, fits into the second receiving groove to extend the first molded part and the second molded part; The second inclined surface is opposite to the first inclined surface and is integrally formed with the vertical surface and fits into the second receiving groove. The second inclined surface is located at the end away from the injection mold for telescopic connection.

[0012] In at least one embodiment of this application, both the first molded part and the second molded part include: An undercut portion is located at the end away from the slider and is respectively disposed on the opposite surfaces of the first inclined surface and the second inclined surface, the undercut portion forming an undercut portion of the inner cavity of the molded part.

[0013] In at least one embodiment of this application, the inner core-pulling structure is configured such that during injection molding, the sliding member extends into the injection mold along the reciprocating sliding direction, while the first molding member and the second molding member extend out to form a molding cavity together with the injection mold. The inner core-pulling structure is configured such that, during demolding, the sliding member is pulled away from the injection mold along the reciprocating sliding direction, while the first molded part and the second molded part retract to move away from the molded part.

[0014] The injection mold includes any of the internal core-pulling structures described above. The internal core-pulling structure extends into the injection mold.

[0015] In at least one embodiment of this application, the injection mold has a sliding hole, and the inner core-pulling structure extends into the sliding hole and is disposed opposite to the injection mold to form a cavity.

[0016] The aforementioned internal core-pulling structure and injection mold achieve extreme compactness by overlapping the first molding part, the second molding part, and the sliding part in the thickness direction, and by at least partially accommodating the two molding parts inside the sliding part. This makes the final thickness of the entire internal core-pulling structure less than the sum of the thicknesses of the two molding parts. Attached Figure Description

[0017] Figure 1 This is a perspective view of the prior art core-pulling structure and injection mold connection described in this application; Figure 2 A perspective view of the prior art core-pulling structure protruding from the injection mold as described in this application; Figure 3 This is a perspective view of the internal core-pulling structure and the injection mold connection described in this application; Figure 4 This is a perspective view of the inner core-pulling structure protruding from the injection mold as described in this application, and a schematic diagram of the first and second molded parts in their contracted state; Figure 5 This is a schematic diagram showing the extended state of the first and second molded parts in this application; Figure 6 This is an exploded view of the internal core-pulling structure described in this application; Explanation of main component symbols 100. Internal core-pulling structure; 10. Sliding component; F1. Reciprocating sliding direction; 20. First molded component; 30. Second molded component; F2. Thickness direction; 50. First receiving groove; 60. Second receiving groove; 11. First inclined surface; 12. Second inclined surface; 13. Vertical surface; 40. Undercut part; 13. Reverse surface; 200. Injection mold; 210. Sliding hole. Detailed Implementation

[0018] The embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0019] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or may also have an intervening component. When a component is considered to be "placed" on another component, it can be directly placed on the other component or may also have an intervening component. The terms "top," "bottom," "upper," "lower," "left," "right," "front," "back," and similar expressions used in this article are for illustrative purposes only.

[0020] Embodiments of this application provide an internal core-pulling structure, including: a slider, a first molding member, and a second molding member. The slider has a reciprocating sliding direction. The first molding member is perpendicular to the slider and is telescopically connected. The second molding member is perpendicular to the slider and is telescopically connected, and is disposed opposite to the first molding member in the thickness direction, which is perpendicular to the reciprocating sliding direction. The first molding member and the second molding member are at least partially accommodated within the slider and overlap with the slider in the thickness direction. The thickness of the internal core-pulling structure is less than the sum of the thicknesses of the first molding member and the second molding member.

[0021] The aforementioned internal core-pulling structure and injection mold arrange the first molding part, the second molding part, and the sliding part to overlap each other in the thickness direction, and at least partially accommodate the two molding parts inside the sliding part. This makes the final thickness of the entire internal core-pulling structure less than the sum of the thicknesses of the two molding parts, thereby achieving an extremely compact structure.

[0022] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0023] Please see Figures 3-6 This application provides an internal core-pulling structure 100, including: a slider 10, a first molding 20, and a second molding 30. The slider 10 generates a reciprocating sliding direction F1. The first molding 20 is perpendicular to the slider 10 and is telescopically connected. The second molding 30 is perpendicular to the slider 10 and is telescopically connected, and is disposed opposite to the first molding 20 in a thickness direction F2, which is perpendicular to the reciprocating sliding direction F1. The first molding 20 and the second molding 30 are at least partially accommodated within the slider 10, and are disposed overlapping each other with the slider 10 in the thickness direction F2. The thickness of the internal core-pulling structure 100 is less than the sum of the thicknesses of the first molding 20 and the second molding 30.

[0024] In this embodiment, it should be noted that the inner core-pulling structure 100 includes a sliding member 10, a first molding member 20, and a second molding member 30. The sliding member 10 generates a reciprocating sliding direction F1 along its length direction. The first molding member 20 and the second molding member 30 are both arranged along a thickness direction F2 perpendicular to the reciprocating sliding direction F1, and are telescopically connected to the sliding member 10 respectively. Specifically, at least a portion of the first molding member 20 and the second molding member 30 are embedded or accommodated inside the sliding member 10, such that the first molding member 20, the second molding member 30, and the sliding member 10 overlap each other in the thickness direction F2, rather than simply being stacked on the outside of the sliding member 10 along the thickness direction F2. After this arrangement, the actual size of the entire inner core-pulling structure 100 in the thickness direction F2 is smaller than the simple sum of the thicknesses of the first molding member 20 and the second molding member 30, thereby achieving a compact design of the inner core-pulling structure 100 in the thickness direction F2 while ensuring that the first molding member 20 and the second molding member 30 can telescopically cooperate with the sliding member 10.

[0025] Since the first molding part 20 and the second molding part 30 are at least partially housed inside the sliding part 10 and overlap with the sliding part 10 in the thickness direction F2, the space occupied by the inner core-pulling structure 100 in the thickness direction F2 is significantly reduced. For the actual injection mold 200 arrangement, the mounting holes or mounting slots reserved for the inner core-pulling structure 100 in the rear mold core can be made narrower and shallower, thereby reducing the amount of cutting on the cross-sectional area of ​​the rear mold core, increasing the effective steel section retained in the rear mold core, improving the overall strength and rigidity of the rear mold core, and reducing the risk of elastic deformation and fatigue cracking during high-pressure injection and mold clamping. At the same time, the first molding part 20 and the second molding part 30 are arranged opposite each other in the thickness direction F2, which is conducive to realizing the molding of the undercut structure on both sides at the same level in a limited space, making the overall structure of the inner core-pulling mechanism more compact, and providing favorable conditions for the subsequent overall mold arrangement and product thinning.

[0026] In one specific embodiment, the first molded part 20 and the second molded part 30 have the same structure.

[0027] In this embodiment, it should be noted that the first molded part 20 and the second molded part 30 adopt the same structural design, that is, their outer contour in the thickness direction F2, the connecting surface that mates with the sliding part 10, and the mounting reference of the molding surface forming the undercut are all consistent. They are only arranged opposite each other on both sides of the sliding part 10 in the assembly position. In actual design, the second molded part 30 can be obtained by mirror copying, so that it completely corresponds to the first molded part 20 in terms of size, tolerance and mating method, thereby forming two molded parts symmetrically arranged on both sides of the sliding part 10.

[0028] Since the first molded part 20 and the second molded part 30 have the same structure, only one set of processing technology and inspection tools for the molded parts needs to be developed during the parts processing and mold manufacturing stages. This allows for the mass production of two symmetrically arranged molded parts, reducing the workload of parts design, multiple sets of cutting tools and multiple sets of programming, and saving processing costs and manufacturing cycle.

[0029] Meanwhile, the two molded parts can be interchanged during assembly, facilitating inventory management and maintenance replacement, and reducing the types of spare parts. On the other hand, the two molded parts maintain consistency in structure and size, ensuring that the forces exerted on the sliding part 10 and the rear mold core under working stress are basically symmetrical in the thickness direction F2. This helps to balance the overall stress state of the inner core-pulling mechanism, further reducing the risk of local stress concentration and deformation, and improving the reliability and service life of the inner core-pulling structure 100 during repeated core-pulling processes.

[0030] In one specific embodiment, both the first molded part 20 and the second molded part 30 are provided with a first receiving groove 50 and a second receiving groove 60. The two first receiving grooves 50 are arranged opposite each other in the thickness direction F2 and wrap around the sliding part 10. The second receiving groove 60 is arranged adjacent to the first receiving groove 50 and accommodates and fits another molded part. The two second receiving grooves 60 are arranged opposite each other in the thickness direction F2.

[0031] In this embodiment, it should be noted that the first molded part 20 and the second molded part 30 are respectively provided with a first receiving groove 50 and a second receiving groove 60. The first receiving groove 50 is disposed opposite to the second receiving groove 60 in the thickness direction F2, and the two receiving grooves together enclose the sliding part 10, so that the sliding part 10 can slide freely within them while maintaining a tight fit. The first receiving groove 50 and the second receiving groove 60 are disposed adjacent to each other and respectively accommodate and fit another molded part.

[0032] By creating receiving grooves on the first molded part 20 and the second molded part 30, the sliding part 10 is not only effectively accommodated and fixed, but its stability and sliding accuracy are also ensured. During injection molding, the sliding part 10 is precisely guided within the receiving groove, avoiding offset and jamming, thereby improving the injection molding quality and molding efficiency of the product. Furthermore, this structural design effectively reduces the overall thickness of the inner core-pulling structure 100, and through reasonable accommodation and arrangement, reduces space occupation and increases the utilization efficiency of the injection mold 200.

[0033] Through precise dimensional matching, the design of the first receiving groove 50 and the second receiving groove 60 optimizes the internal spatial layout of the mold, improves the mold's sealing performance and compressive strength, and reduces the risk of failure due to mold deformation during high-temperature and high-pressure injection molding. Therefore, this embodiment has high structural compactness and reliability, and can meet the needs of complex structures and efficient production.

[0034] In one specific embodiment, the first molded part 20, the second molded part 30, and the sliding part 10 completely overlap in the thickness direction F2. The thickness of the first molded part 20 is equal to the thickness of the second molded part 30. The thickness of the inner core-pulling structure 100 is equal to the thickness of the first molded part 20.

[0035] In this embodiment, it should be noted that the first molding part 20, the second molding part 30, and the sliding part 10 completely overlap in the thickness direction F2, and the thickness of the first molding part 20 is equal to the thickness of the second molding part 30. Through this design, the overall thickness of the inner core-pulling structure 100 is optimized, making the size of the inner core-pulling structure 100 equal to the thickness of the first molding part 20, without requiring additional space for placing the second molding part 30, thereby greatly reducing the space occupied by the inner core-pulling structure 100 in the mold.

[0036] The first molding part 20 and the second molding part 30 have the same thickness, ensuring that the load can be evenly distributed during the stress process, avoiding structural deformation or stress concentration caused by uneven thickness. Since the two molding parts completely overlap in the thickness direction F2, they can more tightly accommodate the sliding part 10 when they cooperate, thereby improving the stability and sliding accuracy of the structure. This structural design not only optimizes the spatial layout of the mold, but also improves the processing efficiency of the mold, because two molding parts can be manufactured simultaneously using the same processing technology and equipment, reducing process complexity and production costs.

[0037] Furthermore, by overlapping the slider 10 with the two molded parts, the thickness of the inner core-pulling structure 100 is precisely controlled, making the mold design more compact, saving manufacturing and assembly space, and improving mold reliability. The smaller thickness allows the injection mold 200 to perform injection and demolding operations more efficiently, avoiding excessive mold stress during injection due to excessive mold thickness, thereby reducing the risk of mold damage.

[0038] In one specific embodiment, the second molded part 30 is attached to the first molded part 20 and located on the same horizontal line.

[0039] In this embodiment, it should be noted that the second molded part 30 is attached to the first molded part 20 and located on the same horizontal line. The fit between the first molded part 20 and the second molded part 30 in the thickness direction F2 is very precise, and they are symmetrically arranged on the horizontal plane, thereby ensuring the symmetry and balance of the structure. Through precise alignment of the two molded parts, the force is evenly distributed during assembly and use, and there will be no offset or deformation caused by asymmetrical arrangement.

[0040] In one specific embodiment, the slider 10 includes: a first inclined surface 11, a vertical surface 13, and a second inclined surface 12.

[0041] The first inclined surface 11 is set along the reciprocating sliding direction F1. Two oppositely arranged first inclined surfaces 11 respectively fit into the two first receiving grooves 50 for telescopic connection. The vertical surface 13 is opposite to the first inclined surface 11 and fits into the second receiving groove 60 to extend out of the first molded part 20 and the second molded part 30. The second inclined surface 12 is opposite to the first inclined surface 11 and is integrally formed with the vertical surface 13. The second inclined surface 12 fits into the second receiving groove 60 and is located at the end away from the injection mold 200 for telescopic connection.

[0042] In this embodiment, it should be noted that the sliding member 10 comprises three parts: a first inclined surface 11, a vertical surface 13, and a second inclined surface 12. The first inclined surface 11 is arranged along the reciprocating sliding direction F1 and fits into the first receiving grooves 50 on both sides, ensuring that the sliding member 10 can smoothly telescopically connect with the first molded part 20. The vertical surface 13 is connected to the side opposite to the first inclined surface 11 and fits into the second receiving groove 60, playing a supporting and guiding role in the stable sliding of the sliding member 10 in the second molded part 30. The second inclined surface 12 is integrally formed with the vertical surface 13 and fits into the second receiving groove 60, ensuring that the sliding member 10 can move smoothly when connected to the second molded part 30, and is located at the end away from the injection mold 200, so as to maintain stability during injection molding and demolding.

[0043] The sliding member 10, through the cooperation of the first inclined surface 11 and the first receiving groove 50, ensures the stability and accuracy of the sliding member 10 in the reciprocating sliding direction F1. The first inclined surface 11 and the second inclined surface 12 are symmetrically arranged, which helps to achieve uniform bidirectional force distribution during injection molding and reduces component deformation or jamming caused by stress imbalance. The fit between the vertical surface 13 and the second receiving groove 60 provides a stable connection between the sliding member 10 and the second molded part 30, effectively ensuring the position control of the sliding member 10 throughout the movement and avoiding displacement errors.

[0044] Furthermore, the second inclined surface 12 allows the sliding member 10 to smoothly extend and retract with the second molded part 30. Due to the tight fit between the sliding member 10 and the second molded part 30, the entire internal core-pulling structure 100 provides higher precision and a longer service life during injection molding. This precise fit reduces friction and wear within the mold, thereby increasing the service life of the injection mold 200 and reducing production costs. In summary, this embodiment, through the precise design of the sliding member 10, enables the internal core-pulling structure 100 to maintain stability while further improving the mold's machining accuracy and injection molding efficiency.

[0045] In one specific embodiment, both the first molded part 20 and the second molded part 30 include an undercut portion 40. The undercut portion 40 is located at one end away from the sliding member 10. The two undercut portions 40 are respectively disposed on the opposite surfaces 13 of the first inclined surface 11 and the second inclined surface 12. The undercut portions 40 form the inner cavity undercut portion 40 of the molded part.

[0046] In this embodiment, it should be noted that both the first molded part 20 and the second molded part 30 include an undercut portion 40. The undercut portion 40 is located at the end away from the sliding member 10 and is respectively disposed on the opposing surface 13 of the first inclined surface 11 and the second inclined surface 12. The design of the undercut portion 40 enables the first molded part 20 and the second molded part 30 to form an inner cavity undercut portion 40 within the mold. The function of the inner cavity undercut portion 40 is to assist in the demolding of the mold during the injection molding process. Especially when dealing with complex geometries, the undercut portion 40 effectively solves the molding and demolding problems of the undercut structure within the mold.

[0047] In one specific embodiment, the inner core-pulling structure 100 is configured such that during injection molding, the sliding member 10 extends into the injection mold 200 along the reciprocating sliding direction F1, while the first molding member 20 and the second molding member 30 extend out to form a molding cavity together with the injection mold 200. The inner core-pulling structure 100 is configured such that during demolding, the sliding member 10 is withdrawn from the injection mold 200 along the reciprocating sliding direction F1, while the first molding member 20 and the second molding member 30 retract to move away from the molding member.

[0048] In this embodiment, it should be noted that the inner core-pulling structure 100 is configured such that during injection molding, the sliding member 10 extends into the injection mold 200 along the reciprocating sliding direction F1. As the sliding member 10 moves, the first molding member 20 and the second molding member 30 extend together, and they, together with the injection mold 200, form a molding cavity, ensuring that the plastic material during the injection molding process can accurately fill the entire mold cavity, guaranteeing the integrity and precision of the plastic part. During this process, the cooperation of the sliding member 10, the first molding member 20, and the second molding member 30 can effectively prevent the overflow or leakage of injection material, ensuring the precise positioning and smooth filling of the molded part.

[0049] During demolding, the sliding member 10 is withdrawn from the injection mold 200 along the reciprocating sliding direction F1, while the first molded part 20 and the second molded part 30 retract to move away from the molded part. This ensures smooth demolding, especially when there are complex undercut structures inside the mold. The retraction action effectively avoids adhesion between the plastic material and the mold wall, reducing the difficulty of demolding. The reciprocating sliding of the sliding member 10 allows the molded part to be smoothly ejected from the mold, avoiding damage or deformation caused by the molded part getting stuck in the mold.

[0050] The injection mold 200 includes any of the aforementioned internal core-pulling structures 100. The internal core-pulling structure 100 extends into the injection mold 200.

[0051] The inner core-pulling structure 100, through the cooperation of the sliding member 10, the first molding member 20, and the second molding member 30, is precisely positioned within the injection mold 200, thereby realizing the molding and demolding of the complex undercut structure of the injection molded part. The extension of the inner core-pulling structure 100 ensures the precise closure of the mold and the enclosure of the molding cavity, further guaranteeing the filling effect of the plastic material during the injection molding process and preventing defects in the plastic part caused by insufficient mold precision.

[0052] After the inner core-pulling structure 100 extends into the injection mold 200, the injection molding and demolding processes can be smoothly completed through the movement of the sliding member 10. During the injection molding process, the layout design of the inner core-pulling structure 100 optimizes the spatial configuration of the molding cavity, allowing the injection material to fill the entire mold evenly, reducing the occurrence of problems such as air bubbles and defects, while ensuring the accuracy of the plastic part shape. During demolding, the inner core-pulling structure 100 can be smoothly removed from the mold, avoiding mold damage or plastic part damage caused by interference from the inner core.

[0053] Furthermore, the injection mold 200 is provided with a sliding hole 210, into which the inner core-pulling structure 100 extends and is positioned opposite to the injection mold 200 to form a molding cavity. This design, by providing the sliding hole 210, further optimizes the position and function of the inner core-pulling structure 100 within the injection mold 200. The sliding hole 210 allows the sliding component 10 to slide freely within the mold, reducing friction and resistance during the sliding process, thereby improving molding efficiency and mold lifespan. The sliding hole 210 also effectively ensures the sealing and precision of the mold, preventing leakage of injection molding material or mold deformation due to mold unsealing.

[0054] Therefore, the aforementioned internal core-pulling structure 100 and injection mold 200 achieve extreme compactness by overlapping the first molding part 20, the second molding part 30, and the sliding part 10 in the thickness direction F2, and by at least partially accommodating the two molding parts inside the sliding part 10. This makes the final thickness of the entire internal core-pulling structure 100 less than the sum of the thicknesses of the two molding parts.

[0055] The above description is merely an embodiment of this application. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this application, but these improvements all fall within the protection scope of this application.

Claims

1. An internal core-pulling structure, characterized in that, include: The sliding component generates a reciprocating sliding direction; The first molded component is perpendicular to the sliding component and is telescopically connected; The second molded part is perpendicular to and telescopically connected to the sliding part, and is disposed opposite to the first molded part in the thickness direction, the thickness direction being perpendicular to the reciprocating sliding direction; The first molded part and the second molded part are respectively at least partially accommodated in the sliding part and are arranged to overlap with the sliding part in the thickness direction. The thickness of the inner core pulling structure is less than the sum of the thicknesses of the first molded part and the second molded part.

2. The inner core-pulling structure according to claim 1, characterized in that, The first molded part and the second molded part have the same structure.

3. The internal core-pulling structure according to claim 1, characterized in that, Both the first molded part and the second molded part have the following: The first receiving groove, the two first receiving grooves are arranged opposite each other in the thickness direction, and wrap around the sliding member; The second receiving groove is arranged adjacent to the first receiving groove and accommodates and fits another molded part. The two second receiving grooves are arranged opposite each other in the thickness direction.

4. The inner core-pulling structure according to claim 1, characterized in that, In the thickness direction, the first molded part, the second molded part, and the sliding part completely overlap. The thickness of the first molded part is equal to the thickness of the second molded part; The thickness of the inner core-pulling structure is equal to the thickness of the first molded part.

5. The internal core-pulling structure according to claim 1, characterized in that, The second molded part is attached to the first molded part and located on the same horizontal line.

6. The internal core-pulling structure according to claim 3, characterized in that, The slider includes: The first inclined surface is set along the reciprocating sliding direction, and the two oppositely set first inclined surfaces are respectively attached to the two first receiving grooves for telescopic connection; A vertical surface, facing away from the first inclined surface, fits into the second receiving groove to extend the first molded part and the second molded part; The second inclined surface is opposite to the first inclined surface and is integrally formed with the vertical surface and fits into the second receiving groove. The second inclined surface is located at the end away from the injection mold for telescopic connection.

7. The internal core-pulling structure according to claim 6, characterized in that, Both the first molded part and the second molded part include: An undercut portion is located at the end away from the slider and is respectively disposed on the opposite surfaces of the first inclined surface and the second inclined surface, the undercut portion forming an undercut portion of the inner cavity of the molded part.

8. The internal core-pulling structure according to claim 1, characterized in that, The inner core-pulling structure is configured such that during injection molding, the sliding member extends into the injection mold along the reciprocating sliding direction, while the first molding member and the second molding member extend out to form a molding cavity together with the injection mold. The inner core-pulling structure is configured such that, during demolding, the sliding member is pulled away from the injection mold along the reciprocating sliding direction, while the first molded part and the second molded part retract to move away from the molded part.

9. An injection mold, characterized in that, Includes the internal core-pulling structure as described in any one of claims 1-8; The inner core-pulling structure extends into the injection mold.

10. The injection mold according to claim 9, characterized in that, The injection mold has a sliding hole, and the inner core-pulling structure extends into the sliding hole and is positioned opposite to the injection mold to form a cavity.

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