Connector shell forming mold and method

Abstract

The invention provides a connector shell forming mold and method.The mold comprises an upper mold body, an upper mold cavity and a first flow guide cavity are formed in the bottom face of the upper mold body, a pouring hole is formed in the upper surface of the upper mold body, and the first flow guide cavity communicates with the pouring hole; the mold core assembly is detachably connected to the interior of the upper cavity; a lower mold cavity and a second flow guide cavity are formed in the upper surface of the lower mold body, the second flow guide cavity is communicated with the lower mold cavity, the lower mold cavity corresponds to the upper mold cavity, and the second flow guide cavity corresponds to the first flow guide cavity; the bottom end of the insert pin penetrates through the upper die body and extends into the lower cavity, an inserting column is formed at the bottom end of the insert pin and connected with the nut in an inserting mode, and the outer diameter of the insert pin is larger than the inner diameter of the nut. According to the scheme, the nut is positioned in the horizontal direction through the inserting part, the nut is positioned in the axial direction through the embedding needle, nut rubber coating caused by dislocation and deviation of the nut in the injection molding process is avoided, scrapping is avoided, the yield is increased, and the production cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of injection molding, and particularly to a connector housing molding die and method. Background Art

[0002] When injection molding a housing such as a connector housing, it is necessary to set a nut in the molding cavity of the die so that the nut is embedded and fixed in the molded housing. However, the current molding die lacks positioning of the nut, especially axial positioning along the nut. After the injection of the raw material, during pressurized heating and molding, the nut is affected by the pressure and is prone to misalignment and offset along the axial direction, resulting in nut encapsulation, waste, and increased production costs. Summary of the Invention

[0003] The present invention provides a connector housing molding die and method, which positions the nut in the horizontal direction through the insertion part and positions the nut in the axial direction through the insert pin, ensuring that the nut is stably located in the lower cavity, avoiding misalignment and offset of the nut during injection molding, thus avoiding nut encapsulation, preventing scrapping, improving the finished product rate, and reducing production costs.

[0004] To solve the above technical problems, the technical solution of the present invention is as follows: A connector housing molding die, comprising: An upper die body, on the bottom surface of which an upper cavity and a first diversion cavity are formed. A pouring hole is provided on the upper surface of the upper die body, and the first diversion cavity is communicated with the pouring hole; A core assembly, which is detachably connected in the upper cavity; A lower die body, on the upper surface of which a lower cavity and a second diversion cavity are formed. The second diversion cavity is communicated with the lower cavity, the lower cavity corresponds to the upper cavity, and the second diversion cavity corresponds to the first diversion cavity; Multiple insert pins, the bottom ends of which penetrate through the upper die body and extend into the lower cavity. Plug columns are formed at the bottom ends of the multiple insert pins, and the plug columns are inserted and connected with the nut. The outer diameter of the insert pin is larger than the inner diameter of the nut.

[0005] Optionally, the outer diameter of the plug column is 0.1 to 0.2 mm larger than the inner diameter of the nut. A through groove is formed through the outer side of the plug column, and the through groove extends radially along the plug column and penetrates the outer side and the bottom surface of the plug column.

[0006] Optionally, a first lower cavity is formed on the surface of the lower die body, and the first lower cavity is communicated with the second diversion cavity; An installation cavity is provided on the bottom surface of the first lower cavity and penetrates through the bottom surface of the lower die body; The shaping block is inserted and connected in the installation cavity. A second lower cavity is formed on the upper surface of the shaping block, and the lower cavity is formed by the second lower cavity and the first lower cavity; Positioning blocks are arranged at the four corners of the surface of the lower mold body, and the positioning blocks are adapted to the positioning grooves on the bottom surface of the upper mold body.

[0007] Optionally, the connector housing forming mold further includes: A diversion groove formed around the first lower cavity; A plurality of overflow grooves formed on the upper surface of the lower mold body, and the plurality of overflow grooves are communicated with the second diversion cavity or the diversion groove.

[0008] Optionally, the upper cavity includes: A second upper cavity corresponding to the first lower cavity; A first upper cavity located on the inner top surface of the second upper cavity, and the mold core assembly is located in the first upper cavity; An insertion cavity is arranged on the inner top surface of the first upper cavity, and the insertion cavity penetrates through the upper surface of the upper mold body; The mold core assembly includes: An insertion part inserted and connected with the insertion cavity; An exposed part formed on the upper part of the insertion part; A core body formed at the bottom of the insertion part, and the core body is located inside the first upper cavity.

[0009] Optionally, the mold core assembly further includes: A plurality of second core pins, the upper ends of the plurality of second core pins are inserted into a plurality of second through cavities inside the core body, and the bottom ends of the plurality of second core pins are inserted into a plurality of third through cavities inside the shaping block; A plurality of first core pins, the plurality of first core pins are inserted into the plurality of second through cavities, and the bottom ends of the plurality of first core pins are abutted against the plurality of second core pins; a plurality of first limit blocks are formed at the upper ends of the plurality of first core pins, and the plurality of first limit blocks are located in a plurality of second sink holes on the upper surface of the exposed part, and the plurality of second sink holes are communicated with the plurality of second through cavities; A plurality of third core pins, the plurality of third core pins are inserted into the plurality of third through cavities, and the upper ends of the plurality of third core pins are abutted against the plurality of second core pins; a plurality of second limit blocks are formed at the bottom ends of the plurality of third core pins, and the plurality of second limit blocks are located in a plurality of third sink holes on the bottom surface of the shaping block, and the plurality of third sink holes are communicated with the plurality of third through cavities.

[0010] Optionally, a plurality of first through cavities are arranged on the inner top surface of the second upper cavity, and a plurality of first sink holes are arranged on the upper surface of the upper mold body, and the plurality of first sink holes are communicated with the plurality of first through cavities; A plurality of insert pins are inserted and cooperated with a plurality of first through cavities. A plurality of positioning posts are formed at the upper ends of the plurality of insert pins, and the plurality of positioning posts are located in a plurality of first counterbores; A plurality of positioning holes for inserting and cooperating with the plurality of insertion posts are arranged on the inner bottom surface of the first lower cavity.

[0011] Optionally, a first diversion channel is arranged inside the upper die body, a first water inlet and a first water outlet are arranged outside the upper die body, and the first water inlet and the first water outlet are respectively communicated with two ends of the first diversion channel.

[0012] Optionally, a second diversion channel is arranged inside the lower die body, a second water inlet and a second water outlet are arranged on the bottom surface of the lower die body, and the second water inlet and the second water outlet are respectively communicated with two ends of the second diversion channel.

[0013] The present invention also provides a method for forming a connector housing, which is applied to the connector housing forming die as described above. The method includes: Connect a plurality of insert pins to the upper die body, and the plurality of insertion posts penetrate through the upper cavity; Insert a plurality of nuts outside the plurality of insertion posts; Install the core assembly into the upper cavity; Close the upper die body and the lower die body; Pour raw materials into the closed upper die body and lower die body through the pouring hole, the first diversion cavity and the second diversion cavity; Pressurize and heat-cure the upper die body and the lower die body after raw material pouring through the hot pressing die of a hot press to obtain a connector housing.

[0014] The above solution of the present invention has at least the following beneficial effects: In the above solution of the present invention, the nut is positioned in the horizontal direction through the insertion part, and the nut is positioned in the axial direction through the insert pin, ensuring that the nut is stably located in the lower cavity, avoiding the nut from being misaligned and offset during injection molding, which may cause the nut to be encapsulated with glue, avoiding scrapping, improving the yield rate, and reducing the production cost. Description of the Drawings

[0015] Figure 1 is a three-dimensional structural schematic diagram of a connector housing forming die provided by an embodiment of the present invention; Figure 2 is a main view cross-sectional view of a connector housing forming die provided by an embodiment of the present invention; Figure 3 is a structural schematic diagram of the upper die body of a connector housing forming die provided by an embodiment of the present invention from the bottom view angle; Figure 4It is a schematic structural diagram when installing a sizing block on a lower die body in a connector housing forming die provided by an embodiment of the present invention; Figure 5 It is a schematic structural diagram of a lower die body in a connector housing forming die provided by an embodiment of the present invention; Figure 6 It is a schematic installation structure diagram of a core pin in a connector housing forming die provided by an embodiment of the present invention; Figure 7 is Figure 6 an enlarged schematic view of part A; Figure 8 It is a front view cross-sectional view of a core die assembly in a connector housing forming die provided by an embodiment of the present invention; Figure 9 It is a top view cross-sectional view of an upper die body in a connector housing forming die provided by an embodiment of the present invention; Figure 10 It is a top view cross-sectional view of a lower die body in a connector housing forming die provided by an embodiment of the present invention.

[0016] The reference numerals are explained as follows: 1. Upper die body; 11. Pouring hole; 12. Insertion cavity; 13. First upper cavity; 131. Second upper cavity; 132. First through cavity; 133. First counterbore; 14. First diversion cavity; 15. Positioning groove; 16. First diversion channel; 17. First water inlet; 18. First water outlet; 2. Lower die body; 21. Second diversion cavity; 22. First lower cavity; 221. Positioning hole; 23. Installation cavity; 24. Overflow groove; 25. Diversion groove; 26. Positioning block; 27. Second diversion channel; 28. Second water inlet; 29. Second water outlet; 31. Exposed part; 311. Second counterbore; 32. Insertion part; 33. Core body; 34. Second through cavity; 35. First core pin; 36. First limiting block; 37. Second core pin; 38. Third core pin; 39. Second limiting block; 4. Sizing block; 41. Second lower cavity; 42. Third through cavity; 43. Third counterbore; 5. Core pin; 51. Positioning column; 52. Insertion column; 53. Through groove; 6. Nut. Detailed implementation manners

[0017] Hereinafter, exemplary embodiments of the present invention will be described in more detail with reference to the drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention can be more thoroughly understood and the scope of the present invention can be completely conveyed to those skilled in the art.

[0018] As Figures 1 to 10As shown in the figure, an embodiment of the present invention provides a forming mold for a connector housing, comprising: An upper die body 1, on the bottom surface of which an upper cavity and a first diversion cavity 14 are formed. A pouring hole 11 is arranged on the upper surface of the upper die body 1, and the first diversion cavity 14 is communicated with the pouring hole 11; A core assembly, which is detachably connected in the upper cavity; A lower die body 2, on the upper surface of which a lower cavity and a second diversion cavity 21 are formed. The second diversion cavity 21 is communicated with the lower cavity, the lower cavity corresponds to the upper cavity, and the second diversion cavity 21 corresponds to the first diversion cavity 14; A plurality of insert pins 5, the bottom ends of which penetrate through the upper die body 1 and extend into the lower cavity. Plug columns 52 are formed at the bottom ends of the plurality of insert pins 5, and the plug columns 52 are plugged and connected with nuts 6. The outer diameter of the insert pin 5 is larger than the inner diameter of the nut 6.

[0019] In this embodiment, the core assembly is installed in the upper cavity, and a plurality of nuts 6 are plugged outside the plurality of plug columns 52; the upper die body 1 and the lower die body 2 are clamped; the clamped upper die body 1 and lower die body 2 are poured with raw materials through the pouring hole 11, the first diversion cavity 14 and the second diversion cavity 21; the poured upper die body 1 and lower die body 2 are pressurized and heated and cured by the hot pressing die of a hot press to obtain the housing; Since the plug column 52 is plugged and connected with the nut 6, and the outer diameter of the insert pin 5 is larger than the inner diameter of the nut 6, the nut 6 is positioned in the horizontal direction by the plugging part 32, and the nut 6 is positioned in the axial direction by the insert pin 5, ensuring that the nut 6 is stably located in the lower cavity, avoiding the phenomenon that the nut 6 is misaligned and offset during injection molding, which may cause the nut 6 to be encapsulated with glue, avoiding scrapping, improving the yield rate, and reducing the production cost; In this embodiment, taking the upper cavity and the lower cavity both being provided with two as an example, in specific applications, the upper cavity and the lower cavity can be single or multiple.

[0020] As Figure 7 shown, in an optional embodiment of the present invention, the outer diameter of the plug column 52 is 0.1 to 0.2 mm larger than the inner diameter of the nut 6. A through groove 53 is formed through the outer side of the plug column 52, and the through groove 53 extends radially along the plug column 52 and penetrates through the outer side and the bottom surface of the plug column 52.

[0021] In this embodiment, the bottom edge of the insertion post 52 has a chamfer structure. When the nut 6 is sleeved on the outside of the insertion post 52, due to the provision of the through slot 53, the insertion post 52 deforms in its radial direction, facilitating the sleeving of the nut 6 onto the outside of the insertion post 52. The insertion post 52 returns to its original shape under the action of its own elastic force. Since the outer diameter of the insertion post 52 is 0.1 to 0.2 mm larger than the inner diameter of the nut 6, the insertion post 52 is in full contact with the nut 6, which helps to improve the positioning stability of the insertion post 52 for the nut 6 and prevent the nut 6 from being misaligned and causing encapsulation.

[0022] As Figure 4 and Figure 5 shown, in an alternative embodiment of the present invention, a first lower cavity 22 is formed on the surface of the lower die body 2, and the first lower cavity 22 is in communication with the second diversion cavity 21; An installation cavity 23 is provided on the inner bottom surface of the first lower cavity 22, and the installation cavity 23 penetrates the bottom surface of the lower die body 2; A shaping block 4, the shaping block 4 is inserted and connected in the installation cavity 23, and a second lower cavity 41 is formed on the upper surface of the shaping block 4. The second lower cavity 41 and the first lower cavity 22 form a lower cavity; Positioning blocks 26 are provided at the four corners of the surface of the lower die body 2, and the positioning blocks 26 are adapted to the positioning grooves 15 on the bottom surface of the upper die body 1.

[0023] In this embodiment, through the insertion connection of the shaping block and the installation cavity 23, the second lower cavity 41 and the first lower cavity 22 form a lower cavity. With the above structure, after the housing is injection-molded, the shaping block is removed to separate the housing from the second lower cavity 41, facilitating the subsequent separation of the housing from the first lower cavity 22 and facilitating the demolding of the housing; Through the cooperative positioning of the positioning block 26 and the positioning groove 15, the accurate mold closing of the upper die body 1 and the lower die body 2 can be ensured; In this embodiment, in specific applications, the positioning block 26 can be composed of a plurality of unit blocks spliced together, which can further improve the convenience of housing demolding.

[0024] As Figure 4 and Figure 5 shown, in an alternative embodiment of the present invention, it further includes: A diversion groove 25 formed around the first lower cavity 22; A plurality of overflow grooves 24 formed on the upper surface of the lower die body 2, and the plurality of overflow grooves 24 are in communication with the second diversion cavity 21 or the diversion groove 25.

[0025] In this embodiment, by providing the diversion groove 25 and the overflow grooves 24, it is convenient for the air inside the upper cavity and the lower cavity to be smoothly discharged during the pouring of the raw material. At the same time, the diversion groove 25 and the overflow grooves 24 accommodate the excess raw material to ensure that the upper cavity and the lower cavity are filled with the raw material.

[0026] As Figure 2 and Figure 3 shown, in an alternative embodiment of the present invention, the upper cavity includes: A second upper cavity 131, the second upper cavity 131 corresponding to the first lower cavity 22; A first upper cavity 13, the first upper cavity 13 being located on the inner top surface of the second upper cavity 131, and the core assembly being located within the first upper cavity 13; An insertion cavity 12 is provided on the inner top surface of the first upper cavity 13, and the insertion cavity 12 penetrates through the upper surface of the upper die body 1; The core assembly includes: An insertion portion 32, the insertion portion 32 being inserted and connected to the insertion cavity 12; An exposed portion 31 formed on the upper part of the insertion portion 32; A core body 33 formed at the bottom of the insertion portion 32, the core body 33 being located inside the first upper cavity 13.

[0027] In this embodiment, when installing the core assembly, hold the exposed portion 31 and insert the insertion portion 32 into the insertion cavity 12 so that the core body 33 is located within the first upper cavity 13, completing the installation of the core assembly. With the above structure, it is convenient to install and remove the core assembly and to demold the housing.

[0028] As Figure 2 and Figure 8 shown, in an alternative embodiment of the present invention, the core assembly further includes: A plurality of second core pins 37, the upper ends of the plurality of second core pins 37 being inserted into a plurality of second through cavities 34 inside the core body 33, and the bottom ends of the plurality of second core pins 37 being inserted into a plurality of third through cavities 42 inside the shaping block 4; A plurality of first core pins 35, the plurality of first core pins 35 being inserted into the plurality of second through cavities 34, and the bottom ends of the plurality of first core pins 35 abutting against the plurality of second core pins 37; a plurality of first limiting blocks 36 are formed at the upper ends of the plurality of first core pins 35, and the plurality of first limiting blocks 36 are located in a plurality of second counterbores 311 on the upper surface of the exposed portion 31, and the plurality of second counterbores 311 communicate with the plurality of second through cavities 34; A plurality of third core pins 38, the plurality of third core pins 38 being inserted into the plurality of third through cavities 42, and the upper ends of the plurality of third core pins 38 abutting against the plurality of second core pins 37; a plurality of second limiting blocks 39 are formed at the bottom ends of the plurality of third core pins 38, and the plurality of second limiting blocks 39 are located in a plurality of third counterbores 43 on the bottom surface of the shaping block 4, and the plurality of third counterbores 43 communicate with the plurality of third through cavities 42.

[0029] In this embodiment, during installation, a plurality of third core pins 38 are inserted into a plurality of third through cavities 42, so that a plurality of second limiting blocks 39 enter a plurality of third counterbores 43; the bottoms of a plurality of second core pins 37 are inserted into the plurality of third through cavities 42 from the surface of the lower mold body 2, and the bottoms of the plurality of second core pins 37 are abutted against the plurality of third core pins 38; a plurality of first core pins 35 are inserted into a plurality of second through cavities 34, so that a plurality of first limiting blocks 36 enter a plurality of second counterbores 311; the upper mold body 1 and the lower mold body 2 are clamped, so that the upper parts of the plurality of second core pins 37 are inserted into the plurality of second through cavities 34 from the bottom surface of the core body 33, and the plurality of second core pins 37 are abutted against the plurality of first core pins 35, and the plurality of first core pins 35, the plurality of second core pins 37 and the plurality of third core pins 38 are completed; In the above manner, a complete core pin is formed by the plurality of first core pins 35, the plurality of second core pins 37 and the plurality of third core pins 38. After the injection molding of the housing is completed, the upper mold body 1 and the lower mold body 2 are separated, the plurality of second core pins 37 are separated from the plurality of second through cavities 34, the shaping block 4 is removed from the inside of the installation cavity 23, and the plurality of second core pins 37 are separated from the plurality of third through cavities 42; the housing is taken out from the first lower cavity 22, and then the plurality of second core pins 37 are separated from the housing, which is convenient for realizing the demolding of the housing and the separation of the core pin from the housing, and helps to improve the demolding efficiency.

[0030] As Figure 3 、 Figure 6 and Figure 7 shown, in an alternative embodiment of the present invention, a plurality of first through cavities 132 are provided on the inner top surface of the second upper cavity 131, and a plurality of first counterbores 133 are provided on the upper surface of the upper mold body 1, and the plurality of first counterbores 133 communicate with the plurality of first through cavities 132; A plurality of insert pins 5 are inserted and matched with the plurality of first through cavities 132, and a plurality of positioning columns 51 are formed at the upper ends of the plurality of insert pins 5, and the plurality of positioning columns 51 are located in the plurality of first counterbores 133; A plurality of positioning holes 221 for inserting and matching with the plurality of insertion columns 52 are provided on the inner bottom surface of the first lower cavity 22.

[0031] In this embodiment, when installing the plurality of insert pins 5, hold the positioning columns 51, insert the insert pins 5 into the first through cavities 132, the positioning columns 51 enter the first counterbores 133, the insertion columns 52 are exposed from the bottom surface of the upper mold body 1, and the nut 6 is sleeved on the outside of the insertion columns 52; When the upper mold body 1 and the lower mold body 2 are clamped, the insertion columns 52 are inserted into the positioning holes 221, the upper surface of the nut 6 abuts against the insert pin 5, and the bottom surface of the nut 6 abuts against the bottom surface of the first lower cavity 22, realizing the positioning of the nut 6 in the axial direction and the radial direction, and avoiding the occurrence of misalignment and offset, which may cause the nut 6 to be encapsulated with glue; In this embodiment, the first counterbore 133 communicates with the insertion cavity 12, facilitating the removal of the insert pin 5 by taking out the positioning post 51. After the insertion portion 32 is inserted into the insertion cavity 12, the exposed portion 31 presses the positioning post 51 into the first counterbore 133 to fix and limit the insert pin 5 in its axial direction, further ensuring the stable limitation of the nut 6.

[0032] As Figure 9 shown, in an alternative embodiment of the present invention, a first diversion channel 16 is provided inside the upper die body 1, and a first water inlet 17 and a first water outlet 18 are provided outside the upper die body 1. The first water inlet 17 and the first water outlet 18 are respectively communicated with both ends of the first diversion channel 16.

[0033] In this embodiment, after heating, pressurizing, and curing are completed, cooling is required. Cooling water is injected into the first diversion channel 16 through the first water inlet 17, and the cooling water is discharged through the first water outlet 18 to achieve water-cooling of the upper die body 1; As Figure 9 shown, the holes such as a1, a2, a3, etc. on the outside of the upper die body 1 are for facilitating the processing of the first diversion channel 16. During specific use, the holes such as a1, a2, a3, etc. are sealed with sealing plugs.

[0034] As Figure 10 shown, in an alternative embodiment of the present invention, a second diversion channel 27 is provided inside the lower die body 2, and a second water inlet 28 and a second water outlet 29 are provided on the bottom surface of the lower die body 2. The second water inlet 28 and the second water outlet 29 are respectively communicated with both ends of the second diversion channel 27.

[0035] In this embodiment, after heating, pressurizing, and curing are completed, cooling is required. Cooling water is injected into the second diversion channel 27 through the second water inlet 28, and the cooling water is discharged through the second water outlet 29 to achieve water-cooling of the lower die body 2; As Figure 10 shown, the holes such as b1, b2, b3, b4, and b5 on the outside of the lower die body 2 are for facilitating the processing of the second diversion channel 27. During specific use, the holes such as b1, b2, b3, b4, and b5 are sealed with sealing plugs.

[0036] The usage process of the connector housing forming die is as follows: Insert the shaping block into the installation cavity 23 so that the second lower cavity 41 and the first lower cavity 22 form the lower cavity; Insert a plurality of third core pins 38 into a plurality of third through cavities 42 so that a plurality of second limiting blocks 39 enter a plurality of third counterbores 43; insert the bottoms of a plurality of second core pins 37 from the surface of the lower die body 2 into a plurality of third through cavities 42, and the bottoms of the plurality of second core pins 37 are in contact with the plurality of third core pins 38; Hold the positioning post 51, insert the ejector pin 5 into the first through cavity 132, the positioning post 51 enters the first counterbore 133, the insertion post 52 exposes from the bottom surface of the upper die body 1, and fit the nut 6 on the outside of the insertion post 52; Hold the exposed part 31, insert the insertion part 32 into the insertion cavity 12, and make the core body 33 located in the first upper cavity 13; Insert multiple first core pins 35 into multiple second through cavities 34, and make multiple first limit blocks 36 enter multiple second counterbores 311; Perform the mold closing of the upper die body 1 and the lower die body 2, so that the upper parts of multiple second core pins 37 are inserted into multiple second through cavities 34 from the bottom surface of the core body 33, and multiple second core pins 37 are in contact with multiple first core pins 35; the insertion post 52 is inserted into the positioning hole 221, the upper surface of the nut 6 is in contact with the ejector pin 5, and the bottom surface of the nut 6 is in contact with the bottom surface of the first lower cavity 22, realizing the positioning of the nut 6 in its axial direction and radial direction; Pour the raw material through the pouring hole 11, the first diversion cavity 14 and the second diversion cavity 21; subject the upper die body 1 and the lower die body 2 after the raw material pouring to pressure heating and curing through the hot pressing die of the hot press to obtain the housing; In the above embodiments of the present invention, the nut 6 is positioned in the horizontal direction through the insertion part 32, and the nut 6 is positioned in the axial direction through the ejector pin 5, ensuring that the nut 6 is stably located in the lower cavity, avoiding the nut 6 being encapsulated due to dislocation and offset during injection molding, avoiding scrapping, improving the yield rate, and reducing the production cost.

[0037] An embodiment of the present invention further provides a method for forming a connector housing, which is applied to the connector housing forming mold of any one of the above embodiments. The method includes: Step 101, connect multiple ejector pins 5 to the upper die body 1, and multiple insertion posts 52 penetrate through the upper cavity; Step 102, fit multiple nuts 6 on the outside of multiple insertion posts 52; Step 103, install the mold core assembly into the upper cavity; Step 104, perform the mold closing of the upper die body 1 and the lower die body 2; Step 105, pour the raw material through the pouring hole 11, the first diversion cavity 14 and the second diversion cavity 21 for the upper die body 1 and the lower die body 2 after the mold closing; Step 106, subject the upper die body 1 and the lower die body 2 after the raw material pouring to pressure heating and curing through the hot pressing die of the hot press to obtain the connector housing.

[0038] In this embodiment, further, step 101 includes: hold the positioning post 51, insert the ejector pin 5 into the first through cavity 132, the positioning post 51 enters the first counterbore 133, the insertion post 52 exposes from the bottom surface of the upper die body 1, and complete the installation of multiple ejector pins 5; Further, step 102 includes: making the nut 6 abut against the insertion post 52. Under the action of the through groove 53, the insertion post 52 is stressed and deformed in its radial direction, so that the nut 6 is sleeved outside the insertion post 52. The insertion post 52 returns to its original state under the action of its own elastic force, so that the insertion post 52 is in full contact with the nut 6 to ensure the stability of the nut 6; Further, step 103 includes: inserting the qualitative block into the installation cavity 23 so that the second lower cavity 41 and the first lower cavity 22 form a lower cavity; inserting a plurality of third core pins 38 into a plurality of third through cavities 42 so that a plurality of second limiting blocks 39 enter a plurality of third counterbores 43; inserting the bottoms of a plurality of second core pins 37 into the plurality of third through cavities 42 from the surface of the lower die body 2, and the bottoms of the plurality of second core pins 37 abut against the plurality of third core pins 38; holding the exposed part 31 and inserting the insertion part 32 into the insertion cavity 12 so that the core body 33 is located in the first upper cavity 13; inserting a plurality of first core pins 35 into a plurality of second through cavities 34 so that a plurality of first limiting blocks 36 enter a plurality of second counterbores 311; Further, step 104 includes: closing the upper die body 1 and the lower die body 2, so that the upper parts of the plurality of second core pins 37 are inserted into the plurality of second through cavities 34 from the bottom surface of the core body 33, and the plurality of second core pins 37 abut against the plurality of first core pins 35; inserting the insertion post 52 into the positioning hole 221, the upper surface of the nut 6 abuts against the dowel pin 5, and the bottom surface of the nut 6 abuts against the bottom surface of the first lower cavity 22 to realize the positioning of the nut 6 in its axial direction and radial direction; Further, step 105 includes: pouring the raw material through the pouring hole 11, the first diversion cavity 14 and the second diversion cavity 21; specifically, injecting the raw material with a temperature within the first preset temperature range into the pouring hole 11 within the first preset pressure range, and making the raw material gradually fill the lower cavity and the upper cavity through the first diversion cavity 14 and the second diversion cavity 21, where the first preset pressure range can be 50 - 150 MPa; the first preset temperature range can be 10 - 30°C higher than the melting point of the material to ensure the fluidity of the raw material; Further, step 106 includes: applying a pressure within a second preset pressure range to the upper die body 1 and the lower die body 2 by the hot pressing die of the hot press for a first preset time to perform the first stage of pressure holding; applying a pressure within a third preset pressure range to the upper die body 1 and the lower die body 2 by the hot pressing die of the hot press for a second preset time to perform the second stage of pressure holding; heating and insulating the upper die body 1 and the lower die body 2 by the hot pressing die of the hot press for a third preset time to make the temperatures of the upper die body 1 and the lower die body 2 within a second preset temperature range for heat preservation and curing to obtain the housing; wherein, the second preset pressure range can be 80% - 90% of the first preset pressure range; the first preset time is until the gate freezes, about 8 seconds; the third preset pressure range can be 50% - 70% of the first preset pressure range; the second preset time is 30% - 50% of the total pressure holding time, and the total pressure holding time is the sum of the first preset time and the second preset time; two-stage pressure holding is adopted to compensate for the shrinkage of the melt during cooling and reduce sink marks; the second preset temperature range can be 60 - 100 °C (when the raw material is a crystalline material) or 40 - 80 °C (when the raw material is a non-crystalline material); the third preset time can be 15 - 25 seconds (when the raw material is a crystalline material) or 10 - 15 seconds (when the raw material is a non-crystalline material); After step 106, it may further include: Step 107, demolding and taking out the housing. Specifically, separate the upper die body 1 and the lower die body 2, hold the exposed part 31 by hand, so that the insertion part 32 is completely separated from the insertion cavity 12, and the core body 33 is completely separated from the upper die body 1; take out the first core pin 35 from the second through cavity 34 through the first limit block 36; completely take out the insert pin 5 from the first through cavity 132 through the positioning post 51; take out the shaping block 4 from the installation cavity 23, and take out the third core pin 38 from the third through cavity 42 through the second limit block 39; take out the housing from the first lower cavity 22 to separate the second core pin 37 from the housing, and complete the demolding of the housing; specifically, the above demolding and mold release processes can be assisted by a thimble system and an air ejector device; Step 108, preliminarily trimming to remove the gate condensate (manual or automatic sprue cutting), burrs, and using the cryogenic deburring technology to process precision parts; checking for appearance defects (such as sink marks, material shortage, flash, weld lines); Step 109, secondary processing; specifically, it may include but is not limited to, surface treatment: electroplating (to improve wear resistance), spraying (for insulation or aesthetics), laser marking (to mark the model); insert fixing: if the insert is not pre-embedded during injection molding, it may need to be pressed in or ultrasonically welded and fixed subsequently; assembly pretreatment: calibrating the dimensions of structures such as buckles and slots to ensure the fitting accuracy with other components (such as terminals, sealing rings); Step 1010, quality inspection and control; Appearance inspection, visual inspection of surface defects (scratches, bubbles, color difference), use of a two-dimensional imager to detect key dimensions (such as aperture, wall thickness); Functional testing, mechanical properties: plug-in force test, tensile strength (to ensure a secure connection between the housing and the terminal); Electrical properties: insulation resistance, withstand voltage test (to verify material insulation and avoid leakage); Environmental adaptability: high and low temperature cycles (-40℃~125℃), damp heat aging, salt spray test (to assess corrosion resistance); The processing of the connector housing is achieved through the above process; in the above process, the nut 6 is positioned in the horizontal direction by the plug-in portion 32, and the nut 6 is positioned in the axial direction by the insert pin 5, ensuring that the nut 6 is stably located in the lower cavity, avoiding the nut 6 from being misaligned and offset during injection molding, causing the nut 6 to be encapsulated with glue, avoiding scrapping, improving the yield rate, and reducing production costs.

[0039] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A connector housing molding die, characterized in that: include: An upper mold body (1), wherein an upper mold cavity and a first guide cavity (14) are formed on the bottom surface of the upper mold body (1), a pouring hole (11) is provided on the upper surface of the upper mold body (1), and the first guide cavity (14) is connected to the pouring hole (11); A core assembly, the core assembly being detachably connected in the upper cavity; A lower mold body (2), wherein a lower mold cavity and a second flow guide cavity (21) are formed on the upper surface of the lower mold body (2), the second flow guide cavity (21) is connected to the lower mold cavity, the lower mold cavity corresponds to the upper mold cavity, and the second flow guide cavity (21) corresponds to the first flow guide cavity (14); A plurality of inlay pins (5), the bottom ends of the plurality of inlay pins (5) passing through the upper mold body (1) and extending into the lower mold cavity, a plug-in column (52) formed at the bottom ends of the plurality of inlay pins (5), the plug-in column (52) being plug-connected to the nut (6), and the outer diameter of the inlay pin (5) being greater than the inner diameter of the nut (6).

2. The connector housing molding die according to claim 1, characterized in that: The outer diameter of the plug-in column (52) is 0.1 to 0.2 mm larger than the inner diameter of the nut (6); a through groove (53) is formed through the outer side of the plug-in column (52); the through groove (53) extends in a radial square shape along the plug-in column (52); and the through groove (53) passes through the outer side and bottom surface of the plug-in column (52).

3. The connector housing molding die according to claim 1, characterized in that: A first lower cavity (22) is formed on the surface of the lower mold body (2), and the first lower cavity (22) is connected to the second guide cavity (21); The inner bottom surface of the first lower mold cavity (22) is provided with a mounting cavity (23), and the mounting cavity (23) passes through the bottom surface of the lower mold body (2); A shaping block (4), the shaping block (4) being plug-connected in the installation cavity (23), a second lower cavity (41) being formed on the upper surface of the shaping block (4), the second lower cavity (41) and the first lower cavity (22) forming the lower cavity; Positioning blocks (26) are provided at four corners of the surface of the lower mold body (2), and the positioning blocks (26) are adapted to the positioning grooves (15) on the bottom surface of the upper mold body (1).

4. The connector housing molding die according to claim 3, characterized in that: Also includes: a guide groove (25) formed around the first lower cavity (22); A plurality of overflow grooves (24) are formed on the upper surface of the lower mold body (2), and the plurality of overflow grooves (24) are connected to the second guide cavity (21) or the guide groove (25).

5. The connector housing molding die according to claim 3, characterized in that: The upper cavity comprises: a second upper cavity (131), the second upper cavity (131) corresponding to the first lower cavity (22); a first upper cavity (13), the first upper cavity (13) being located on the inner top surface of the second upper cavity (131), and the core assembly being located in the first upper cavity (13); The inner top surface of the first upper mold cavity (13) is provided with an inserting cavity (12), and the inserting cavity (12) penetrates the upper surface of the upper mold body (1); The core component comprises: An inserting portion (32), the inserting portion (32) being plug-connected to the inserting cavity (12); An exposed portion (31) formed on the upper portion of the plug-in portion (32); A core body (33) formed at the bottom of the plug-in portion (32), the core body (33) being located inside the first upper cavity (13).

6. The connector housing molding die according to claim 5, characterized in that: The core assembly also includes: A plurality of second core needles (37), wherein the upper ends of the plurality of second core needles (37) are inserted into the plurality of second through-holes (34) inside the core body (33), and the lower ends of the plurality of second core needles (37) are inserted into the plurality of third through-holes (42) inside the shaping block (4); A plurality of first core needles (35), the plurality of first core needles (35) are inserted into the plurality of second through-cavities (34), and the bottom ends of the plurality of first core needles (35) are in contact with the plurality of second core needles (37); a plurality of first limit blocks (36) are formed on the upper ends of the plurality of first core needles (35), the plurality of first limit blocks (36) are located in the plurality of second countersunk holes (311) on the upper surface of the exposed portion (31), and the plurality of second countersunk holes (311) are in communication with the plurality of second through-cavities (34); A plurality of third core needles (38) are inserted into the plurality of third through-cavities (42), and the upper ends of the plurality of third core needles (38) are in contact with the plurality of second core needles (37); a plurality of second limiting blocks (39) are formed at the bottom ends of the plurality of third core needles (38), and the plurality of second limiting blocks (39) are located in the plurality of third countersunk holes (43) on the bottom surface of the shaping block (4), and the plurality of third countersunk holes (43) are in communication with the plurality of third through-cavities (42).

7. The connector housing molding die according to claim 5, characterized in that: The inner top surface of the second upper cavity (131) is provided with a plurality of first through cavities (132), the upper surface of the upper mold body (1) is provided with a plurality of first countersunk holes (133), and the plurality of first countersunk holes (133) are connected to the plurality of first through cavities (132); The plurality of inlay pins (5) are plugged into and matched with the plurality of first through cavities (132); the plurality of inlay pins (5) are formed with a plurality of positioning posts (51) at the upper ends thereof; the plurality of positioning posts (51) are located in the plurality of first countersunk holes (133); The inner bottom surface of the first lower cavity (22) is provided with a plurality of positioning holes (221) for plugging and cooperating with a plurality of plug-in columns (52).

8. The connector housing molding die according to claim 1, characterized in that: A first flow guide channel (16) is provided inside the upper mold body (1), and a first water inlet (17) and a first water outlet (18) are provided outside the upper mold body (1), wherein the first water inlet (17) and the first water outlet (18) are respectively connected to two ends of the first flow guide channel (16).

9. The connector housing molding die according to claim 1, characterized in that: A second flow guide channel (27) is arranged inside the lower mold body (2), and a second water inlet (28) and a second water outlet (29) are arranged on the bottom surface of the lower mold body (2), and the second water inlet (28) and the second water outlet (29) are respectively connected to two ends of the second flow guide channel (27).

10. A method for molding a connector housing, characterized in that: Applied to the connector housing molding die according to any one of claims 1 to 9, the method comprises: A plurality of insert pins (5) are connected to the upper mold body (1), and a plurality of plug-in columns (52) penetrate the upper mold cavity; Inserting a plurality of nuts (6) onto the outside of a plurality of insertion posts (52); Install the core assembly into the upper cavity; The upper mold body (1) and the lower mold body (2) are molded together; The upper mold body (1) and the lower mold body (2) that have been molded together are poured with raw materials through the pouring hole (11), the first guide cavity (14) and the second guide cavity (21); The upper mold body (1) and the lower mold body (2) after the raw material casting are pressurized, heated and cured by a hot pressing mold of a hot pressing machine to obtain a connector housing.

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