Die

Abstract

The utility model relates to the technical field of injection molding, in particular to a mold, the mold is used for manufacturing insulating nut columns, the mold comprises a first mold plate and a second mold plate, the first mold plate is detachably provided with a first mold core, the first mold core is used for correspondingly preassembling a first metal fastener, and the second mold plate is used for correspondingly preassembling a second metal fastener. The columnar head of the first metal fastener protrudes out of the first template; a first mold core is detachably arranged on the first mold plate, a second mold core is detachably arranged on the second mold plate, the second mold core comprises an injection molding cavity, a second metal fastener is correspondingly preassembled in the injection molding cavity, and when the first mold plate and the second mold plate are closed, the columnar head of the first metal fastener is also arranged in the injection molding cavity and is not in contact with the second metal fastener. According to the die provided by the utility model, the production of insulating nut columns of various specifications can be realized through one die, the manufacturing cost and the management cost of the die are effectively reduced, the flexibility of a production mode is improved, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, specifically to a mold. Background Technology

[0002] In the field of mechanical manufacturing and processing, it is often necessary to connect multiple objects using fasteners such as screws and nuts. Traditional fasteners are made of metal or plastic. Metal fasteners have good connection effect but lack insulation, while plastic fasteners have good insulation but poor connection effect.

[0003] However, in the connection of some products, it is necessary to ensure both effective physical connection and a certain degree of insulation. Therefore, the insulating nut post was invented. The insulating nut post consists of two metal fasteners located at the top and bottom ends, with a plastic layer between the two metal fasteners, and the outer walls of both metal fasteners are wrapped with plastic walls. In this way, the insulating nut post can ensure both reliable connection and a certain degree of insulation.

[0004] The production of insulating nut posts typically utilizes injection molds. The metal fasteners are pre-placed in the mold and then integrally molded with the raw material during injection. Traditional production methods, where one specification of insulating nut post corresponds to one injection mold, have several drawbacks: ① Producing multiple specifications requires multiple molds, increasing mold manufacturing and management costs; ② Production is inflexible, necessitating frequent mold changes for different specifications, impacting production efficiency; ③ The mold components lack commonality and replaceability. Utility Model Content

[0005] This invention addresses the technical problems of high cost, poor flexibility, and limited interchangeability and replaceability of mold parts in the production of insulating nut columns in the prior art. It proposes a mold that can produce insulating nut columns of various specifications with a single mold, effectively reducing mold manufacturing and management costs, improving the flexibility of production methods, and increasing production efficiency.

[0006] The technical solution of this utility model:

[0007] A mold for manufacturing an insulating nut post, the insulating nut post comprising a first metal fastener and a second metal fastener;

[0008] The mold includes a first template and a second template. The first template is detachably provided with a first mold core, which is used to pre-install the first metal fastener. The columnar head of the first metal fastener protrudes from the first template. The second template is detachably provided with a second mold core, which includes an injection cavity. The second metal fastener is pre-installed in the injection cavity. When the first template and the second template are closed, the columnar head of the first metal fastener is also placed in the injection cavity and does not contact the second metal fastener.

[0009] Furthermore, the first metal fastener includes a screw portion and a columnar head, the second metal fastener is columnar and has a threaded blind hole formed at one end, the screw portion and the threaded blind hole are coaxial and located at both ends of the insulating nut column, the insulating nut column also includes an insulating layer located between the first metal fastener and the second metal fastener and an insulating wall surrounding the columnar head and the outer wall of the second metal fastener.

[0010] Furthermore, a first mold cavity is formed on the side of the first template facing the second template, and the first mold core is placed in the first mold cavity; a second mold cavity is formed on the side of the second template facing the first template, and the second mold core is placed in the second mold cavity; the first mold core and the second mold core correspond to the specifications of the insulating nut column to be manufactured, and the first template is also provided with a glue inlet channel communicating with the injection cavity.

[0011] Furthermore, the first mold core is provided with a first positioning structure to position the first metal fastener; the second mold core is provided with a second positioning structure to position the second metal fastener.

[0012] Furthermore, the first mold core is provided with a first receiving groove corresponding to the screw portion of the first metal fastener, and a first spring positioning bead is provided on the inner wall of the first receiving groove to position the screw portion; the second mold core is provided with a second receiving groove corresponding to the second metal fastener, the second receiving groove is formed as the injection cavity, and a protrusion is also formed on the bottom surface of the second receiving groove, and a second spring positioning bead is provided on the outer wall of the protrusion to position the threaded blind hole of the second metal fastener.

[0013] Furthermore, the first mold core is provided with a first receiving groove corresponding to the screw portion of the first metal fastener, and a first internal thread is formed in the first receiving groove to fix the screw portion; the second mold core is provided with a second receiving groove corresponding to the second metal fastener, the second receiving groove is formed as the injection cavity, and an auxiliary screw is passed through the bottom surface of the second receiving groove. The auxiliary screw is threadedly connected to the second template and is used to fix and connect the threaded blind hole of the second metal fastener.

[0014] Furthermore, the shape of the first mold cavity and the outer contour of the first mold core are chamfered cylinders; the shape of the second mold cavity and the outer contour of the second mold core are chamfered cylinders.

[0015] Furthermore, the first template is detachably provided with a plurality of first mold cores, and the second template is correspondingly detachably provided with a plurality of second mold cores.

[0016] Furthermore, the thread specification of the screw portion of the first metal fastener is the same as the thread specification of the threaded blind hole of the second metal fastener.

[0017] Furthermore, the columnar head of the first metal fastener, the second metal fastener, and the outer contour of the insulating wall are all regular hexagonal prisms.

[0018] After adopting the above technical solution, the mold provided by this utility model has the following beneficial effects compared with the prior art: The first mold core and the second mold core of the mold provided by this utility model can be set according to the required specifications of the insulating nut column, so that the production of insulating nut columns of various specifications only requires one mold, effectively reducing the mold manufacturing cost and management cost; it also improves the flexibility of the production method and increases the production efficiency; and the mold parts have good commonality and replaceability. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of an insulating nut post;

[0020] Figure 2 This is a cross-sectional view of the insulating nut post;

[0021] Figure 3 This is a cross-sectional view of the mold in Example 1;

[0022] Figure 4 This is a schematic diagram of the structure of the first template in Embodiment 1;

[0023] Figure 5 for Figure 4 AA section view in the middle;

[0024] Figure 6 This is a schematic diagram of the structure of the first mold core in Example 1;

[0025] Figure 7 for Figure 6 BB section view in the middle;

[0026] Figure 8 This is a schematic diagram of the structure of the second template in Example 1;

[0027] Figure 9 for Figure 8CC section view in the middle;

[0028] Figure 10 This is a schematic diagram of the structure of the second mold core in Example 1;

[0029] Figure 11 for Figure 10 DD section view in the middle;

[0030] Figure 12 This is a cross-sectional view of the mold in Example 2;

[0031] Figure 13 This is a cross-sectional view of the first mold core in Example 3;

[0032] Figure 14 This is a cross-sectional view of the second mold core in Example 3.

[0033] in,

[0034] Insulating nut post 1, first metal fastener 11, screw part 111, columnar head 112, second metal fastener 12, threaded blind hole 121, insulating shell 13, insulating layer 131, insulating wall 132;

[0035] First mold plate 21, first mold cavity 211, injection runner 212; second mold plate 22, second mold cavity 221; first mold core 23, first receiving groove 231, first spring positioning bead 232, first spring 2321, first positioning bead 2322, first set screw 233, first internal thread 234; second mold core 24, second receiving groove 241, injection cavity 242, protrusion 243, second spring positioning bead 244, second spring 2441, second positioning bead 2442, wedge block 245, second set screw 246, auxiliary screw 25. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0037] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0038] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship 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. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0039] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0040] Example 1:

[0041] This embodiment provides a mold for manufacturing an insulating nut post 1, specifically, as follows: Figure 1-2As shown, the insulating nut post 1 includes a first metal fastener 11 and a second metal fastener 12, which are insulated and separated by injection molding material. The first metal fastener 11 includes a screw portion 111 and a columnar head 112. The outer diameter of the screw portion 111 is smaller than the outer contour of the columnar head 112, and the outer contour of the columnar head 112 is preferably a regular hexagonal prism. Further, the second metal fastener 12 is also columnar, and its outer contour is preferably a regular hexagonal prism. One end of the second metal fastener 12 is recessed inward to form a blind hole, and the blind hole is a threaded hole, forming a threaded blind hole 121. The threaded blind hole 121 has the same thread specification as the screw portion 111 of the first metal fastener 11, and the two are coaxially arranged. They are located at both ends of the overall insulating nut post 1 product, that is, the screw portion 111 faces downward for connection with the object below, and the threaded blind hole 121 faces upward for connection with the object above. Furthermore, the insulating nut post 1 also includes an insulating layer 131 located between the first metal fastener 11 and the second metal fastener 12, separating the two, and an insulating wall 132 surrounding the outer sidewall of the post-shaped head 112 and the second metal fastener 12. The insulating layer 131 and the insulating wall 132 together form an insulating shell 13. After the first metal fastener 11 and the second metal fastener 12 are pre-embedded, the insulating shell 13 is formed by injection molding.

[0042] like Figure 3As shown, the mold in this embodiment includes a first template 21 and a second template 22. The first template 21 is detachably provided with a first mold core 23. For example, the first mold core 23 can be installed on the first template 21 by magnetic attraction, bolt connection or other means. The first mold core 23 is used to correspond to the pre-installed first metal fastener 11. A first positioning structure can be set to position the first metal fastener 11. After the first metal fastener 11 is pre-installed, its columnar head 112 protrudes from the first template 21. Furthermore, the second mold core 24 is detachably provided on the second mold plate 22. For example, the second mold core 24 can also be installed on the second mold plate 22 by magnetic attraction, bolt connection or other means. The outer end of the second mold core 24 is recessed inward to form an injection cavity 242. The injection cavity 242 is pre-installed with a second metal fastener 12. A second positioning structure can be set to position the second metal fastener 12. After pre-installation, the second metal fastener 12 is located at the bottom of the injection cavity 242. The first mold plate 21 can be configured as a fixed mold plate, and the second mold plate 22 can be configured as a movable mold plate. When the second mold plate 22 and the first mold plate 21 are closed, the columnar head 112 of the first metal fastener 11 is also placed in the injection cavity 242 and does not contact the second metal fastener 12. The space in the injection cavity 242 other than the columnar head 112 of the first metal fastener 11 and the second metal fastener 12 can be filled by injection molding material to form a plastic insulating shell 13.

[0043] This embodiment provides a mold in which the first mold core 23 and the second mold core 24 are adapted to the required specifications of the insulating nut post 1. For example, when the required insulating nut post 1 is of M6 specification, the corresponding first mold core 23 and second mold core 24 are selected. If the required insulating nut post 1 is changed to M10 specification, the first mold core 23 and the second mold core 24 are replaced accordingly without changing the structural dimensions of the first template 21 and the second template 22. In addition, different first metal fasteners 11 can be replaced to achieve different product lengths. Thus, compared with the prior art, the production of various specifications of insulating nut posts 1 only requires one mold, effectively reducing the mold manufacturing and management costs; it also improves the flexibility of the production method and increases production efficiency; and the mold parts have good commonality and replaceability.

[0044] like Figure 4-7 As shown, in this embodiment, a first mold cavity 211 is formed on the side of the first template 21 facing the second template 22. The first mold cavity 211 is correspondingly placed with a first mold core 23. The first mold core 23 corresponds to the specification setting of the first metal fastener 11 of the insulating nut post 1 to be manufactured; as shown Figure 8-11As shown, a second mold cavity 221 is formed on the side of the second template 22 facing the first template 21. The second mold cavity 221 is correspondingly placed with a second mold core 24. The second mold core 24 corresponds to the specification of the second metal fastener 12 of the insulating nut post 1 to be manufactured. In this embodiment, a glue inlet channel 212 is provided on the surface of the first template 21 facing the second template 22. The glue inlet channel 212 connects the injection cavity 242 and the glue inlet. The position of the glue inlet can be set as needed. In this embodiment, it is preferable to detachably provide multiple first mold cores 23 on the first template 21 and detachably provide multiple second mold cores 24 on the second template 22. The glue inlet channel 212 needs to be connected to the injection cavity 242 of each second mold core 24 to allow glue to be injected simultaneously.

[0045] like Figure 3-11 As shown, in order to better position the first metal fastener 11 and the second metal fastener 12 and prevent them from falling off during injection molding, this embodiment provides a first receiving groove 231 on the first mold core 23 corresponding to the screw portion 111 of the first metal fastener 11. The inner wall of the first receiving groove 231 is provided with a plurality of first spring positioning beads 232. When the screw portion 111 of the first metal fastener 11 is inserted into the first receiving groove 231, the first spring positioning beads 232 first elastically avoid and then extend to lock and position. Further, the second mold core 24 is provided with a second receiving groove 241 corresponding to the second metal fastener 12. The second receiving groove 241 forms the injection cavity 242. A protrusion 243 is also formed on the bottom surface of the second receiving groove 241. The outer wall of the protrusion 243 is provided with second spring positioning beads 244. When the second metal fastener 12 is sleeved on the protrusion 243, the second spring positioning beads 244 first avoid and then extend to lock and position with the threaded blind hole 121. This allows the first metal fastener 11 and the second metal fastener 12 to be positioned more reliably during pre-installation, ensuring the stability of subsequent injection molding and guaranteeing the product yield.

[0046] In this embodiment, the outer contour of the columnar head 112 of the first metal fastener 11 and the outer contour of the second metal fastener 12 are both regular hexagonal prisms, which can prevent them from circumferentially shifting with the insulating shell 13; in addition, the outer contour of the insulating wall 132 of the insulating shell 13 is also regular hexagonal prism, which is convenient to use.

[0047] Furthermore, such as Figure 4 , 6As shown, the first mold cavity 211 in this embodiment is a chamfered cylinder, that is, a cylinder with an arc corner cut off. The outer contour of the first mold core 23 is also a chamfered cylinder. This design prevents the first mold core 23 from rotating relative to the first mold cavity 211, ensuring stable injection molding. Furthermore, it minimizes the dimensions of the first mold core 23 and the first mold cavity 211 while maintaining the wall thickness of the first mold core 23. Similarly, as... Figure 8 , 10 As shown, the shape of the second mold cavity 221 and the outer contour of the second mold core 24 are also chamfered cylindrical shapes, which can also achieve the above-mentioned effect.

[0048] In this embodiment, the mold firstly separates and opens the first mold plate 21 and the second mold plate 22. The corresponding first mold core 23 and second mold core 24 are selected according to the specifications of the insulating nut post 1 to be manufactured. The first mold core 23 is fitted into the first mold cavity 211 on the first mold plate 21, and the second mold core 24 is fitted into the second mold core 24 on the second mold plate 22. Next, the first metal fastener 11 is installed in the first receiving groove 231 of the first mold core 23, and the second metal fastener 12 is installed in the protrusion 243 of the second mold core 24. Then, the injection molding machine is started, and the first mold plate 21 and the second mold plate 22 close. Molten plastic enters the injection cavity 242 between the first mold core 23 and the second mold core 24 through the injection channel 212 and fills it completely. After cooling, the first mold plate 21 and the second mold plate 22 separate and open, and the finished insulating nut post 1 can be removed.

[0049] As can be seen from the above, the mold provided in this embodiment can produce insulating nut posts of various specifications with a single mold, effectively reducing the manufacturing and management costs of the mold, and improving the flexibility of the production method and production efficiency.

[0050] Example 2:

[0051] The mold provided in this embodiment differs from that in Embodiment 1 in that the first positioning structure and the second positioning structure are different.

[0052] Specifically, such as Figure 12As shown, in this embodiment, the first mold core 23 is provided with a first receiving groove 231 corresponding to the screw portion 111 of the first metal fastener 11. A first internal thread 234 is formed in the first receiving groove 231 to thread-fix the screw portion 111. The second mold core 24 is provided with a second receiving groove 241 corresponding to the second metal fastener 12. The second receiving groove 241 is formed as an injection cavity 242. A through hole is formed on the bottom surface of the second receiving groove 241. An auxiliary screw 25 passes through the through hole. The auxiliary screw 25 is threaded to the second mold plate 22, and its inner end extends into the injection cavity 242 for thread-fixing the threaded blind hole 121 of the second metal fastener 12.

[0053] In production, the first mold plate 21 and the second mold plate 22 are opened first. After selecting the corresponding first mold core 23 and the second mold core 24, the first metal fastener 11 is fixed through the first receiving groove 231, and the second metal fastener 12 is fixed through the auxiliary screw 25. Then, the injection molding machine is started, the first mold plate 21 and the second mold plate 22 are closed, and injection molding begins. After injection molding is completed, the auxiliary screw 25 is rotated to remove the product. Then, the first mold plate 21 and the second mold plate 22 are separated and opened, and the insulating nut column 1 is rotated to remove the entire product.

[0054] As can be seen from the above, the mold provided in this embodiment can also achieve the positioning of the first metal fastener and the second metal fastener, thereby facilitating subsequent injection molding and ensuring the yield rate of the product.

[0055] Example 3:

[0056] The mold provided in this embodiment differs from that in Embodiment 1 in that the first positioning structure and the second positioning structure are different.

[0057] In Example 1, as Figure 7 The first positioning structure is a first spring positioning bead 232 located in a first receiving groove 231 on the first mold core 23. A first slot is provided on the inner side wall of the first receiving groove 231, and the first spring positioning bead 232 is placed in the first slot. The first spring positioning bead 232 includes a first spring and a first positioning bead. One end of the first spring is fixed, and the other end is connected to the first positioning bead. The first positioning bead can retract to avoid and extend to lock in position. Multiple first spring positioning beads 232 can be arranged circumferentially.

[0058] In this embodiment, the first positioning structure is further improved, specifically, as follows: Figure 13As shown, the first positioning structure in this embodiment includes a first spring 2321, a first positioning bead 2322, and a first set screw 233. All three are located in the first slot on the inner sidewall of the first receiving groove 231. The inner end of the first spring 2321 is connected to the first positioning bead 2322, and the outer end of the first spring 2321 is connected to or abuts against the first set screw 233. The first set screw 233 can be completely placed in the first slot on the inner sidewall of the first receiving groove 231 and is threaded into the first slot. By rotating and adjusting the first set screw 233, the pre-compression of the first spring 2321 can be changed, thereby adjusting the magnitude of the clamping force.

[0059] In Example 1, as Figure 11 The second positioning structure is a second spring positioning bead 244 on a protrusion 243 within the second receiving groove 241 on the second mold core 24. A second slot is provided on the outer wall of the protrusion 243, and the second spring positioning bead 244 is placed in the second slot. The second spring positioning bead 244 includes a second spring and a second positioning bead. One end of the second spring is fixed, and the other end is connected to the second positioning bead. The second positioning bead can retract to avoid and extend to lock in position. Multiple second spring positioning beads 244 can be arranged circumferentially.

[0060] This embodiment further improves the second positioning structure, specifically, as follows: Figure 14 As shown, the second positioning structure in this embodiment includes a second spring 2441, a second positioning bead 2442, a wedge 245, and a second set screw 246, in addition to the second spring 2441, the second positioning bead 2442, and the wedge 245. The second spring 2441, the second positioning bead 2442, and the wedge 245 are all located in the second slots corresponding to the outer side wall of the protrusion 243. The outer end of the second spring 2441 is connected to the second positioning bead 2442, and the inner end is connected to the wedge 245. The protruding end of the wedge 245 is formed with an inclined surface. The protrusion 243 is also provided with a threaded groove, and the second set screw 246 is connected in the threaded groove. The second set screw 246 can be completely placed in the threaded groove. By rotating the second set screw 246, the conical head of the second set screw 246 can push the wedge 245 to move radially, thereby adjusting the magnitude of the clamping force.

[0061] As can be seen from the above, the mold provided in this embodiment can adjust the clamping force to ensure that the first metal fastener and the second metal fastener can be effectively clamped, and also facilitates the removal of the product after the subsequent injection molding process.

[0062] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A mold characterized in that, The mold is used for manufacturing an insulating nut column (1), The insulating nut column (1) comprises a first metal fastener (11) and a second metal fastener (12); The mold comprises a first mold plate (21) and a second mold plate (22), the first mold plate (21) is detachably provided with a first mold core (23), the first mold core (23) is used for corresponding pre-assembly of the first metal fastener (11), and a columnar head (112) of the first metal fastener (11) protrudes from the first mold plate (21); the second mold plate (22) is detachably provided with a second mold core (24), the second mold core (24) comprises an injection cavity (242), the second metal fastener (12) is pre-assembled in the injection cavity (242), and when the first mold plate (21) and the second mold plate (22) are combined, the columnar head (112) of the first metal fastener (11) is also placed in the injection cavity (242) and does not contact the second metal fastener (12).

2. The mold of claim 1, wherein The first metal fastener (11) comprises a screw rod part (111) and a columnar head (112), the second metal fastener (12) is columnar and has a threaded blind hole (121) at one end, the screw rod part (111) and the threaded blind hole (121) are coaxial and are located at two ends of the insulating nut column (1) respectively, and the insulating nut column (1) further comprises an insulating layer (131) between the first metal fastener (11) and the second metal fastener (12) and an insulating wall (132) wrapping outer walls of the columnar head (112) and the second metal fastener (12).

3. The mold of claim 2, wherein, One side of the first mold plate (21) facing the second mold plate (22) is provided with a first mold cavity (211), and the first mold cavity (211) corresponds to the first mold core (23); one side of the second mold plate (22) facing the first mold plate (21) is provided with a second mold cavity (221), and the second mold cavity (221) corresponds to the second mold core (24); the first mold core (23) and the second mold core (24) are set according to specifications of the insulating nut column (1) to be manufactured, and the first mold plate (21) is further provided with a glue inlet flow channel (212) connected to the injection cavity (242).

4. The mold of claim 3, wherein, The first mold core (23) is provided with a first positioning structure for positioning the first metal fastener (11); and the second mold core (24) is provided with a second positioning structure for positioning the second metal fastener (12).

5. The mold of claim 4, wherein, The first die core (23) is provided with a first accommodating groove (231) corresponding to the screw rod part (111) of the first metal fastener (11), and the inner wall of the first accommodating groove (231) is provided with a first spring positioning bead (232) for positioning the screw rod part (111); the second die core (24) is provided with a second accommodating groove (241) corresponding to the second metal fastener (12), the second accommodating groove (241) is formed as the injection cavity (242), and the bottom surface of the second accommodating groove (241) is further formed with a protrusion (243), and the outer wall of the protrusion (243) is provided with a second spring positioning bead (244) for positioning the threaded blind hole (121) of the second metal fastener (12).

6. The mold of claim 4, wherein, The first die core (23) is provided with a first accommodating groove (231) corresponding to the screw rod part (111) of the first metal fastener (11), and the first accommodating groove (231) is formed with a first internal thread (234) inside for fixing the screw rod part (111); the second die core (24) is provided with a second accommodating groove (241) corresponding to the second metal fastener (12), the second accommodating groove (241) is formed as the injection cavity (242), and the bottom surface of the second accommodating groove (241) is penetrated by an auxiliary screw rod (25), the auxiliary screw rod (25) is threadedly connected to the second die plate (22) and is used for fixedly connecting the threaded blind hole (121) of the second metal fastener (12).

7. The mold of claim 3, wherein The shape of the first die cavity (211) and the outer contour of the first die core (23) are cut-angle cylindrical shapes; the shape of the second die cavity (221) and the outer contour of the second die core (24) are cut-angle cylindrical shapes.

8. The mold of claim 1 or 2, wherein The first die plate (21) is detachably provided with a plurality of first die cores (23), and the second die plate (22) is correspondingly detachably provided with a plurality of second die cores (24).

9. The mold of claim 2, wherein, The thread specification of the screw rod part (111) of the first metal fastener (11) is the same as the thread specification of the threaded blind hole (121) of the second metal fastener (12).

10. The mold of claim 2, wherein, The outer contour of the cylindrical head part (112) of the first metal fastener (11), the second metal fastener (12) and the insulating wall (132) are all regular hexagonal prisms.

Images