Injection mold

Abstract

The utility model relates to the technical field of plastic part manufacturing equipment discloses an injection mold. The injection mold includes first template assembly and second template assembly, one of two can move along the first direction to realize the closing or opening of mould, fixed core is connected with first template assembly fixedly, elastic core is connected with second template assembly fixedly at first end, and the second end can be elastically deformed along the second direction and is provided with the cooperation feature, and the cooperation feature includes the recess and / or the convex, when closing, the fixed core along the second direction presses the second end of elastic core and makes the cooperation feature, first template assembly and second template assembly and enclose the cavity for the shaping work piece, when opening, the fixed core is separated from elastic core, and the second end restores the deformation and makes the cooperation feature along the second direction and separates from the work piece. The injection mold can make the cooperation feature and the work piece separate while the cavity opens, avoid the cooperation feature and the work piece sticking together and cause the work piece yield rate low.

Description

Technical Field

[0001] This utility model relates to the field of plastic parts manufacturing equipment technology, and in particular to an injection mold. Background Technology

[0002] The housings of some electrical components are typically made of plastic and are injection molded. In some cases, the edges of the housings have undercuts for mating with other parts of the electrical component, so the cavity wall of the injection mold needs to have grooves for forming these undercuts.

[0003] In related technologies, injection molds typically include a moving mold, a fixed mold, an elastic ejector, and an ejection mechanism. The moving and fixed molds enclose the main body of the cavity. The first end of the elastic ejector slides with the fixed mold, and the second end has a groove for forming an undercut and can elastically deform relative to the first end. Specifically, the elastic ejector has a first position and a second position relative to the fixed mold. When the fixed molds are closed, the elastic ejector is in the first position, and the second end of the elastic ejector elastically deforms under the constraint of the fixed mold, enclosing the part of the cavity for forming the undercut. After the moving and fixed molds separate and the cavity is opened, the ejection mechanism ejects the workpiece from the cavity and simultaneously drives the elastic ejector from the first position to the second position. At this time, the second end of the elastic ejector loses the constraint of the fixed mold and recovers its elastic deformation in the direction away from the workpiece. The undercut part of the workpiece separates from the groove on the elastic ejector, realizing the demolding of the undercut part. However, in the above-mentioned injection mold, the undercut is prone to sticking when separating from the groove during demolding, the undercut is easily damaged, and the workpiece yield is low.

[0004] Therefore, there is an urgent need for an injection mold to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide an injection mold that can separate the mating features on the elastic core from the workpiece while the cavity is opening, thereby avoiding the low yield rate of the workpiece caused by the mating features sticking to the workpiece.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] Injection molds, including:

[0008] A first template assembly and a second template assembly, one of which is movable relative to the other along a first direction to achieve mold closing or mold opening;

[0009] The fixed core is fixedly connected to the first template assembly;

[0010] The elastic core has a first end fixedly connected to the second template assembly, and a second end capable of elastically deforming along a second direction. The second end is provided with a mating feature, which includes a groove and / or a protrusion.

[0011] During mold closing, the fixed core presses against the second end of the elastic core along the second direction to elastically deform, so that the mating feature, the first template assembly and the second template assembly form a cavity for molding the workpiece;

[0012] During mold opening, the fixed core separates from the elastic core, the second end recovers its deformation, and the mating feature separates from the workpiece along the second direction.

[0013] As an optional solution, the fixed core is provided with a first mating surface at one end near the second template assembly, the first mating surface being set at an angle to the first direction, and the elastic core is provided with a second mating surface at the second end;

[0014] During mold closing, the first mating surface presses against the second mating surface and fits into the second mating surface, so that the second end of the elastic core is elastically deformed.

[0015] As an optional solution, the fixed core is provided with a first guide fillet, which is located at one end of the first mating surface near the second template assembly, for guiding the first mating surface and the second mating surface to fit together; and / or

[0016] The second end of the elastic core is also provided with a second guide rounded corner, which is located at the end of the second mating surface near the first template assembly, and is used to guide the first mating surface and the second mating surface to fit together.

[0017] As an alternative, the second end of the elastic core includes a mating portion and an extension portion, the extension portion connecting the first end of the elastic core and the mating portion, and the mating feature being disposed on the mating portion;

[0018] The cross-sectional area of ​​the extension is smaller than the cross-sectional area of ​​the end of the first end connected to the extension; and / or

[0019] The cross-sectional area of ​​the extension is smaller than the cross-sectional area of ​​the end of the mating part that is connected to the extension.

[0020] As an alternative, a first transition fillet is provided at the connection position between the extension and the first end; and / or, a second transition fillet is provided at the connection position between the extension and the mating part.

[0021] As an optional solution, the second template assembly includes a second core plate, the second core plate being provided with a second through hole extending along the first direction, and the second end of the elastic core passing through the second through hole and being able to deform within the second through hole;

[0022] During mold closing, the fixed core is inserted into the second through hole and the elastic core is pressed against the side wall of the second through hole along the second direction.

[0023] As an optional solution, the second template assembly further includes a second plate body, which is fixed to the side of the second core plate away from the first template assembly, and a second groove is recessed on the hole wall at the end of the second through hole away from the first template assembly.

[0024] The first end of the elastic core includes a connecting portion and a first boss portion. The connecting portion passes through the second through hole and abuts against the second plate. The first boss portion is connected to the connecting portion and abuts against the platform between the second through hole and the second recess.

[0025] As an optional solution, the second template assembly further includes a limiting post, which is connected to the second plate and passes through the second through hole. The sidewalls of the limiting post and the second through hole together clamp the elastic core along the second direction.

[0026] As an optional solution, the first template assembly includes a first plate and a first core plate. The first core plate is installed on the side of the first plate facing the second template assembly. The first core plate is provided with a first through hole, and a first groove is recessed on the hole wall at the end of the first through hole away from the second template assembly.

[0027] The fixed core includes a core body and a second protrusion. The core body passes through the first through hole and abuts against the first plate. The second protrusion is connected to the end of the core body away from the second template assembly and abuts against the platform between the first through hole and the first recess.

[0028] As an optional solution, the elastic core is provided in multiple and is constructed as at least one elastic core group, each elastic core group includes at least two elastic cores, the injection mold includes fixed cores corresponding to the number of elastic core groups, and each elastic core group corresponds to one fixed core, and at least two elastic cores of the same elastic core group are arranged circumferentially around an axis extending along the first direction.

[0029] During mold closing, the fixed core is inserted between at least two elastic cores of the corresponding elastic core group and the second end of each elastic core is elastically deformed along the second direction.

[0030] The beneficial effects of this utility model are:

[0031] In this invention, when the first and second mold plates are closed, the fixed core presses against the second end of the elastic core along the second direction, causing the second end of the elastic core to deform elastically. This causes the mating feature to reach a first position along the second direction. At this time, the mating feature, the first mold plate assembly, and the second mold plate assembly together form a cavity for molding the workpiece. The mating feature is used to mold the undercut on the workpiece. When one of the first or second mold plates moves along the first direction and the mold opens, the fixed core separates from the elastic core. At this time, the second end of the elastic core recovers its deformation along the second direction, thereby causing the mating feature to separate from the workpiece along the second direction. In this invention, the timing of the separation of the mating feature from the undercut on the workpiece coincides with the opening of the cavity. During this process, at least part of the workpiece is located within the cavity, and the sidewalls of the cavity constrain the workpiece, reducing deformation of the undercut portion and preventing the undercut from sticking to the mating feature and causing damage, thus improving the yield of the injection molded workpiece. Furthermore, compared to the existing technology that uses an ejector mechanism to drive the elastic inclined ejector, this design is simpler and less expensive. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the workpiece provided in a specific embodiment of the present utility model;

[0033] Figure 2 This is a cross-sectional view of the injection mold provided in a specific embodiment of this utility model;

[0034] Figure 3 yes Figure 2 Enlarged view of point A in the image;

[0035] Figure 4 This is a schematic diagram of the fixed core and elastic core provided in a specific embodiment of the present invention during mold closing;

[0036] Figure 5 This is a cross-sectional view of the fixed core and the elastic core provided in a specific embodiment of this utility model during mold opening;

[0037] Figure 6 This is a cross-sectional view of the fixed core and the elastic core provided in a specific embodiment of this utility model during mold closing.

[0038] In the picture:

[0039] 10. First template assembly; 11. First plate; 12. First core plate; 121. First through hole;

[0040] 20. Second template assembly; 21. Second plate; 22. Second core plate; 221. Second through hole; 222. Second recessed groove; 23. Limiting post;

[0041] 30. Fixed core; 31. Core body; 311. First mating surface; 312. First guide fillet; 32. Second boss portion;

[0042] 40. Elastic core; 41. First end; 411. Connecting part; 412. First boss part; 42. Second end; 421. Mating part; 4211. Second mating surface; 4212. Second guide fillet; 4213. Mating feature; 422. Extension part; 43. First transition fillet; 44. Second transition fillet;

[0043] 50. Workpiece; 51. Undercut; 52. Sidewall; 53. Opening. Detailed Implementation

[0044] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not the entire structure.

[0045] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0046] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0047] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0048] This embodiment provides an injection mold for injection molding. Figure 1 The workpiece 50 is shown. In this embodiment, the first direction, the second direction, and the third direction are three mutually perpendicular directions in space. For example... Figure 1 As shown, the workpiece 50 is provided with an opening 53, and an undercut 51 is provided on the side wall 52 opposite to the opening 53 along the second direction, and the undercut 51 protrudes from the corresponding side wall 52 along the second direction.

[0049] like Figures 2-4As shown, the injection mold includes a first template assembly 10, a second template assembly 20, a fixed core 30, and an elastic core 40. The fixed core 30 is fixedly connected to the first template assembly 10. The first end 41 of the elastic core 40 is fixedly connected to the second template assembly 20, and the second end 42 can elastically deform along a second direction. A mating feature 4213 is provided on the second end 42 of the elastic core 40. In this embodiment, the mating feature 4213 includes a groove for a backing 51 on the molding tool. One of the first template assembly 10 and the second template assembly 20 can move relative to the other along a first direction to achieve mold closing or mold opening. During mold closing, the fixed core 30 presses against the second end 42 of the elastic core 40 along the second direction, causing elastic deformation, so that the mating feature 4213, the first template assembly 10, and the second template assembly 20 form a cavity for molding the workpiece 50. During mold opening, the fixed core 30 separates from the elastic core 40. At this time, the second end 42 of the elastic core 40 recovers its deformation along the second direction, causing the mating feature 4213 to separate from the undercut 51 of the workpiece 50 along the second direction. That is to say, in the injection mold of this embodiment, the timing of the separation of the mating feature 4213 from the undercut 51 on the workpiece 50 is during the cavity opening process. During this process, the workpiece 50 is at least partially located in the cavity, and the sidewall 52 of the cavity constrains the workpiece 50, which can reduce the deformation of the undercut 51, thereby avoiding the undercut 51 from sticking to the mating feature 4213 and being damaged, and improving the yield of the injection molded workpiece 50. In addition, compared with the prior art scheme of setting an ejector mechanism to drive the elastic inclined ejector, the structure is simpler and the cost is lower. In other embodiments (not shown), when the structure to be formed on the workpiece 50 is a groove, the aforementioned mating feature 4213 includes a protrusion. In another embodiment, when the structure to be formed on the workpiece 50 includes both a groove and a protrusion, the mating feature 4213 is configured to include both a protrusion and a groove.

[0050] In this embodiment, the first template assembly 10 is a fixed mold, and the second template assembly 20 is a movable mold that can move closer to or further away from the first template assembly 10 along a first direction to achieve mold closing and mold opening. Specifically, the first template assembly 10 includes a first plate 11 and a first core plate 12, with the first core plate 12 mounted on the side of the first plate 11 facing the second template assembly 20. The second template assembly 20 includes a second plate 21 and a second core plate 22, with the second core plate 22 mounted on the side of the first plate 11 facing the first template assembly 10. A first groove is provided on the side of the first core plate 12 facing the second core plate 22, and a second groove is provided on the side of the second core plate 22 facing the first core plate 12. The groove wall of the first groove, the groove wall of the second groove, and the surface of the mating feature 4213 portion of the elastic core 40 together form a cavity.

[0051] like Figure 2 and Figure 3As shown, the fixed core 30 extends generally along the first direction, with one end of the fixed core 30 extending out of the first template assembly 10 near the second template assembly 20 along the first direction, so as to contact the elastic core 40 during mold closing. The second core plate 22 is provided with a second through hole 221 extending along the first direction, and the elastic core 40 extends generally along the first direction and is disposed in the second through hole 221. The cross-sectional area of ​​the second through hole 221 is larger than the cross-sectional area of ​​the elastic core 40, at least in the region corresponding to the second end 42 of the elastic core 40, so that the second end 42 of the elastic core 40 can elastically deform within the second through hole 221. During mold closing, the fixed core 30 is inserted into the second through hole 221 and the elastic core 40 is pressed against the side wall 52 of the second through hole 221 along the second direction. This ensures the precise positioning of the mating feature 4213 on the elastic core 40, thereby ensuring the shape and positional accuracy of the undercut 51 on the final workpiece 50.

[0052] Optionally, the injection mold includes a plurality of elastic cores 40, which are configured as at least one elastic core group. Each elastic core group includes at least two elastic cores 40. The injection mold includes fixed cores 30 corresponding to the number of elastic core groups, and each elastic core group corresponds to one fixed core 30. At least two elastic cores 40 of the same elastic core group are arranged circumferentially around an axis extending along a first direction. During mold closing, the fixed core 30 is inserted between at least two elastic cores 40 of the corresponding elastic core group, causing the second end 42 of each elastic core 40 to elastically deform. That is, in this embodiment, one fixed core 30 can play a role in resisting deformation of at least two elastic cores 40, which can further reduce the manufacturing cost of the injection mold when the number of undercuts 51 is large.

[0053] In this embodiment, each fixed core 30 of the injection mold and at least two elastic cores 40 of the corresponding elastic core group are used to form all the undercuts 51 on a workpiece 50. Figure 1 and Figure 3 As shown, the workpiece 50 has undercuts 51 on both opposite sidewalls 52 along the second direction. Therefore, in this embodiment, each elastic core assembly includes two elastic cores 40, and each of the two elastic cores 40 has a mating feature 4213 on its side facing away from each other, so as to facilitate the forming of undercuts 51 on the two sidewalls 52 of the opening 53. Furthermore, since each sidewall 52 of the opening 53 has two undercuts 51, and these two undercuts 51 are spaced apart along the third direction, therefore... Figure 4As shown, the mating feature 4213 includes two grooves spaced apart along a third direction, which are respectively used to form two undercuts 51 on the same sidewall 52 of the workpiece 50. It is understood that in some cases, the injection mold can form multiple workpieces 50 at one time. In this embodiment, the injection mold is provided with multiple cavities, and each cavity is provided with a fixed core 30 and a set of elastic cores.

[0054] like Figure 2 and Figure 3 As shown, a second recessed groove 222 is recessed on the wall of the second through hole 221 at the end opposite to the first template assembly 10. A platform perpendicular to the first direction is formed between the second recessed groove 222 and the second through hole 221. The first end 41 of the elastic core 40 includes a connecting portion 411 and a first protrusion portion 412. The connecting portion 411 passes through the second through hole 221 and abuts against the second plate 21. The first protrusion portion 412 is connected to the connecting portion 411 and abuts against the platform between the second through hole 221 and the second recessed groove 222. Through the cooperation between the platform and the first plate 11, the elastic core 40 is limited in the first direction. In this embodiment, along the third direction, the width of the second through hole 221 is the same as the width of the elastic core 40, thereby limiting the elastic core 40 in the third direction. In this embodiment, the second template assembly 20 further includes a limiting post 23. The limiting post 23 is connected to the second plate 21 and passes through a second through hole 221. The sidewalls 52 of the limiting post 23 and the second through hole 221 together clamp the elastic core 40 along the second direction, thereby limiting the elastic core 40 along the second direction. This achieves the fixation between the elastic core 40 and the second template assembly 20. No fasteners are required, resulting in a simple structure and convenient assembly. In this embodiment, both elastic cores 40 are installed within a second through hole 221. The limiting post 23 is positioned at the middle of the second through hole 221 along the second direction, and the two elastic cores 40 are respectively positioned on both sides of the limiting post 23. The limiting post 23 is used to limit the two elastic cores 40 along the second direction, thereby further simplifying the structure of the injection mold.

[0055] like Figure 3 and Figure 4As shown, the first core plate 12 is provided with a first through hole 121, which extends along a first direction. A first recessed groove is recessed on the wall of the end of the first through hole 121 away from the second template assembly 20. The fixed core 30 includes a core body 31 and a second protrusion 32. The core body 31 passes through the first through hole 121 and abuts against the first plate 11. The second protrusion 32 is connected to the end of the core body 31 away from the second template assembly 20 and abuts against the platform between the first through hole 121 and the first recessed groove. This arrangement allows the first plate 11 and the aforementioned platform to limit the fixed core 30 along the first direction. Furthermore, the dimensions of the first through hole 121 along the second direction and the third direction are consistent with the dimensions of the core body 31 along the second direction and the third direction, respectively, to limit the fixed core 30 in the second and third directions. This achieves the fixation of the fixed core 30 without the need for additional fasteners, resulting in a simple structure and low cost.

[0056] like Figures 4-6 As shown, the fixed core 30 has a first mating surface 311 at one end near the second template assembly 20, and the first mating surface 311 is set at an angle to the first direction. The second end 42 of the elastic core 40 has a second mating surface 4211. During mold closing, as the fixed core 30 approaches the elastic core 40 along the first direction, the first mating surface 311 presses against the second mating surface 4211 and fits into place. Through the cooperation of the first mating surface 311 and the second mating surface 4211, not only can the elastic deformation of the second end 42 of the elastic core 40 be realized, but the position of the mating feature 4213 on the elastic core 40 is also ensured to be accurate, thus ensuring the positional and dimensional accuracy of the finally formed undercut 51. In this embodiment, the second mating surfaces 4211 of the two elastic cores 40 are arranged opposite each other along the second direction. The fixed core 30 includes two first mating surfaces 311, and the two second mating surfaces 4211 are arranged at one end of the core body 31 near the second template assembly 20, and on both sides along the second direction. The two second mating surfaces 4211 respectively mate with the two first mating surfaces 311. It can be understood that, for an embodiment in which an elastic core assembly includes three or more elastic cores 40, the fixed core 30 can be provided with a corresponding number of first mating surfaces 311.

[0057] like Figure 5As shown, the fixed core 30 is provided with a first guide fillet 312, which is located at the end of the first mating surface 311 near the second template assembly 20. The second end 42 of the elastic core 40 is also provided with a second guide fillet 4212, which is located at the end of the second mating surface 4211 near the first template assembly 10. Both the first guide fillet 312 and the second guide fillet 4212 are used to guide the first mating surface 311 and the second mating surface 4211 to fit together, ensuring smooth mold closing, reducing wear on the fixed core 30 and the elastic core 40, and improving the service life of the injection mold.

[0058] like Figures 4-6 As shown, the second end 42 of the elastic core 40 includes a mating portion 421 and an extension portion 422, with the extension portion 422 connecting the first end 41 of the elastic core 40 and the mating portion 421. That is, the extension portion 422 connects the mating portion 421 and the connecting portion 411. A mating feature 4213 is provided on the mating portion 421. The cross-sectional area of ​​the extension portion 422 is smaller than the cross-sectional area of ​​the end where the first end 41 connects to the extension portion 422, and the cross-sectional area of ​​the extension portion 422 is smaller than the cross-sectional area of ​​the end where the mating portion 421 connects to the extension portion 422. This configuration allows the elastic core 40 to have sufficiently good elastic deformation capability in the second direction, so that after the fixed core 30 separates from the elastic core 40, it can recover its deformation along the second direction, thereby reliably separating from the undercut 51 on the workpiece 50. In this embodiment, a first transition fillet 43 is provided at the connection position between the extension portion 422 and the first end 41. A second transition fillet 44 is provided at the connection position between the extension portion 422 and the mating portion 421. The use of the first transition fillet 43 and the second transition fillet 44 prevents stress concentration in the elastic core 40 at locations where the cross-sectional area changes, thereby improving the service life of the elastic core 40. Optionally, in this embodiment, the elastic core 40 may be made of spring steel.

[0059] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. For those skilled in the art, based on the concept of this utility model, there will be changes in the specific implementation methods and application scope. The content of this specification should not be construed as a limitation of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. Injection mold, characterized in that include: The first template assembly (10) and the second template assembly (20), one of which is capable of moving relative to the other in a first direction to achieve mold closing or mold opening; The fixed core (30) is fixedly connected to the first template assembly (10); The elastic core (40) has a first end (41) fixedly connected to the second template assembly (20), and a second end (42) that can elastically deform along a second direction. The second end (42) is provided with a mating feature (4213), which includes a groove and / or a protrusion. During mold closing, the fixed core (30) presses against the second end (42) of the elastic core (40) along the second direction to elastically deform, so that the mating feature (4213), the first template assembly (10) and the second template assembly (20) form a cavity for molding the workpiece (50); When the mold is opened, the fixed core (30) separates from the elastic core (40), the second end (42) recovers its deformation and causes the mating feature (4213) to separate from the workpiece (50) along the second direction.

2. The injection mold of claim 1, wherein, The fixed core (30) has a first mating surface (311) at one end near the second template assembly (20), the first mating surface (311) is set at an angle to the first direction, and the second end (42) of the elastic core (40) has a second mating surface (4211). During mold closing, the first mating surface (311) presses against the second mating surface (4211) and fits against the second mating surface (4211) so that the second end (42) of the elastic core (40) is elastically deformed.

3. The injection mold of claim 2, wherein, The fixed core (30) is provided with a first guide fillet (312), which is located at one end of the first mating surface (311) near the second template assembly (20) to guide the first mating surface (311) and the second mating surface (4211) to fit together; and / or The second end (42) of the elastic core (40) is also provided with a second guide fillet (4212), which is provided at one end of the second mating surface (4211) near the first template assembly (10) to guide the first mating surface (311) and the second mating surface (4211) to fit together.

4. The injection mold as described in claim 1, characterized in that, The second end (42) of the elastic core (40) includes a mating part (421) and an extension part (422). The extension part (422) connects the first end (41) of the elastic core (40) and the mating part (421). The mating feature (4213) is disposed on the mating part (421). The cross-sectional area of ​​the extension (422) is smaller than the cross-sectional area of ​​the end of the first end (41) connected to the extension (422); and / or The cross-sectional area of ​​the extension (422) is smaller than the cross-sectional area of ​​the end of the mating part (421) that is connected to the extension (422).

5. The injection mold as described in claim 4, characterized in that, A first transition fillet (43) is provided at the connection position between the extension (422) and the first end (41); and / or, a second transition fillet (44) is provided at the connection position between the extension (422) and the mating part (421).

6. The injection mold as described in claim 1, characterized in that, The second template assembly (20) includes a second core plate (22), on which a second through hole (221) extending along the first direction is provided, and the second end (42) of the elastic core (40) passes through the second through hole (221) and can deform within the second through hole (221); During mold closing, the fixed core (30) is inserted into the second through hole (221) and the elastic core (40) is pressed against the side wall of the second through hole (221) along the second direction.

7. The injection mold as described in claim 6, characterized in that, The second template assembly (20) further includes a second plate (21), which is fixed to the side of the second core plate (22) away from the first template assembly (10). A second recessed groove (222) is provided on the wall of the second through hole (221) away from the first template assembly (10). The first end (41) of the elastic core (40) includes a connecting part (411) and a first boss part (412). The connecting part (411) passes through the second through hole (221) and abuts against the second plate (21). The first boss part (412) is connected to the connecting part (411) and abuts against the platform between the second through hole (221) and the second recess (222).

8. The injection mold as described in claim 7, characterized in that, The second template assembly (20) further includes a limiting post (23), which is connected to the second plate (21) and passes through the second through hole (221). The sidewalls of the limiting post (23) and the second through hole (221) together clamp the elastic core (40) along the second direction.

9. The injection mold as described in claim 1, characterized in that, The first template assembly (10) includes a first plate (11) and a first core plate (12). The first core plate (12) is installed on the side of the first plate (11) facing the second template assembly (20). The first core plate (12) is provided with a first through hole (121). A first groove is recessed on the hole wall at the end of the first through hole (121) away from the second template assembly (20). The fixed core (30) includes a core body (31) and a second protrusion (32). The core body (31) passes through the first through hole (121) and abuts against the first plate (11). The second protrusion (32) is connected to one end of the core body (31) away from the second template assembly (20) and abuts against the platform between the first through hole (121) and the first recess.

10. The injection mold according to any one of claims 1-9, characterized in that, The elastic core (40) is provided in a plurality of and is configured as at least one elastic core group. Each elastic core group includes at least two elastic cores (40). The injection mold includes a fixed core (30) corresponding to the number of elastic core groups. Each elastic core group corresponds to one fixed core (30). At least two elastic cores (40) of the same elastic core group are arranged circumferentially around an axis extending along the first direction. During mold closing, the fixed core (30) is inserted between at least two elastic cores (40) of the corresponding elastic core group and the second end (42) of each elastic core (40) is elastically deformed along the second direction.

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