A connector housing forming die and method

Abstract

The present invention provides a forming die and method for a connector housing. The die includes: an upper die body, on the bottom surface of which an upper cavity and a first diversion cavity are formed, and 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 die 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; a dowel pin, the bottom end of which penetrates the upper die body and extends into the lower cavity, a plug column is formed at the bottom end of the dowel pin, the plug column is inserted and connected with a nut, and the outer diameter of the dowel pin is larger than the inner diameter of the nut. The solution of the present invention positions the nut in the horizontal direction through the insertion part and positions the nut in the axial direction through the dowel pin, avoiding the misalignment and offset of the nut 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

Technical Field

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

[0002] When injection molding a housing such as a connector housing, it is necessary to set a nut in the forming cavity of the mold so that the nut is embedded and fixed in the formed housing. However, the current forming mold lacks positioning of the nut, especially axial positioning along the nut. After the injection of the raw material, when pressurizing and heating for 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 forming mold and method for a connector housing, which positions the nut in the horizontal direction through a plugging part and positions the nut in the axial direction through an insert pin, ensuring that the nut is stably located in the lower cavity, avoiding misalignment and offset of the nut during injection molding, thereby avoiding nut encapsulation, avoiding scrapping, improving the yield rate, and reducing production costs.

[0004] To solve the above technical problems, the technical solution of the present invention is as follows:

[0005] A forming mold for a connector housing, comprising:

[0006] An upper mold body, on the bottom surface of which an upper cavity and a first diversion cavity are formed, a pouring hole is arranged on the upper surface of the upper mold body, and the first diversion cavity is communicated with the pouring hole;

[0007] A mold core assembly, which is detachably connected in the upper cavity;

[0008] A lower mold 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;

[0009] A plurality of insert pins, the bottom ends of the plurality of insert pins penetrate the upper mold body and extend into the lower cavity, plugging columns are formed at the bottom ends of the plurality of insert pins, the plugging columns are connected with the nut in a plugging manner, and the outer diameter of the insert pin is larger than the inner diameter of the nut.

[0010] Optionally, the outer diameter of the plugging column is 0.1 to 0.2 mm larger than the inner diameter of the nut, a through groove is formed through the outside of the plugging column, the through groove extends along the radial direction of the plugging column, and the through groove penetrates the outside and the bottom surface of the plugging column.

[0011] Optionally, a first lower cavity is formed on the surface of the lower mold body, and the first lower cavity is communicated with the second diversion cavity;

[0012] An installation cavity is provided on the bottom surface of the first lower cavity, and the installation cavity penetrates the bottom surface of the lower die body.

[0013] A sizing block, the sizing block is inserted and connected in the installation cavity, a second lower cavity is formed on the upper surface of the sizing block, and the second lower cavity and the first lower cavity form the lower cavity.

[0014] Positioning blocks are provided at the four corners of the surface of the lower die body, and the positioning blocks are adapted to the positioning grooves on the bottom surface of the upper die body.

[0015] Optionally, the connector housing forming die further includes:

[0016] A diversion groove formed around the first lower cavity;

[0017] A plurality of overflow grooves formed on the upper surface of the lower die body, and the plurality of overflow grooves communicate with the second diversion cavity or the diversion groove.

[0018] Optionally, the upper cavity includes:

[0019] A second upper cavity, the second upper cavity corresponding to the first lower cavity;

[0020] A first upper cavity, the first upper cavity located on the inner top surface of the second upper cavity, and the die core assembly is located in the first upper cavity;

[0021] An insertion cavity is provided on the inner top surface of the first upper cavity, and the insertion cavity penetrates the upper surface of the upper die body.

[0022] The die core assembly includes:

[0023] An insertion portion, the insertion portion being inserted and connected to the insertion cavity;

[0024] An exposed portion formed on the upper part of the insertion portion;

[0025] A core body formed at the bottom of the insertion portion, the core body being located inside the first upper cavity.

[0026] Optionally, the die core assembly further includes:

[0027] A plurality of second core pins, the upper ends of the plurality of second core pins being inserted into a plurality of second through cavities inside the core body, and the bottom ends of the plurality of second core pins being inserted into a plurality of third through cavities inside the sizing block;

[0028] A plurality of first core pins are inserted into a plurality of second through cavities, and the bottom ends of the plurality of first core pins are in contact with a plurality of second core pins; a plurality of first limiting blocks are formed at the upper ends of the plurality of first core pins, and the plurality of first limiting blocks are located in a plurality of second counter bores on the upper surface of the exposed part, and the plurality of second counter bores are communicated with the plurality of second through cavities;

[0029] A plurality of third core pins are inserted into a plurality of third through cavities, and the upper ends of the plurality of third core pins are in contact with a plurality of second core pins; a plurality of second limiting blocks are formed at the bottom ends of the plurality of third core pins, and the plurality of second limiting blocks are located in a plurality of third counter bores on the bottom surface of the shaping block, and the plurality of third counter bores are communicated with the plurality of third through cavities.

[0030] Optionally, a plurality of first through cavities are provided on the top surface of the second upper cavity, and a plurality of first counter bores are provided on the upper surface of the upper die body, and the plurality of first counter bores are communicated with the plurality of first through cavities;

[0031] A plurality of insert pins are inserted and matched with the plurality of first through cavities, and a plurality of positioning columns are formed at the upper ends of the plurality of insert pins, and the plurality of positioning columns are located in the plurality of first counter bores;

[0032] A plurality of positioning holes for inserting and matching with the plurality of inserting columns are provided on the bottom surface of the first lower cavity.

[0033] Optionally, a first diversion channel is provided inside the upper die body, a first water inlet and a first water outlet are provided on the outer side of 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.

[0034] Optionally, a second diversion channel is provided inside the lower die body, a second water inlet and a second water outlet are provided 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.

[0035] The present invention also provides a method for forming a connector housing, which is applied to the connector housing forming die as described above, and the method includes:

[0036] Connect a plurality of insert pins to the upper die body, and a plurality of inserting columns penetrate through the upper cavity;

[0037] Insert a plurality of nuts outside the plurality of inserting columns;

[0038] Install the die core assembly into the upper cavity;

[0039] Close the upper die body and the lower die body;

[0040] Pour raw materials into the completed upper die body and lower die body through the pouring hole, the first diversion cavity and the second diversion cavity;

[0041] The upper mold body and the lower mold body with the raw materials poured are pressurized and heated for curing through the hot pressing mold of a hot press to obtain a connector housing.

[0042] The above solution of the present invention has at least the following beneficial effects:

[0043] In the above solution of the present invention, the nut is positioned horizontally by the plugging part and axially by 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

[0044] Figure 1 is a three-dimensional structural schematic diagram of a connector housing forming mold provided by an embodiment of the present invention;

[0045] Figure 2 is a front view cross-sectional view of a connector housing forming mold provided by an embodiment of the present invention;

[0046] Figure 3 is a structural schematic diagram of the lower view angle of the upper mold body in a connector housing forming mold provided by an embodiment of the present invention;

[0047] Figure 4 is a structural schematic diagram of the lower mold body when installing a sizing block in a connector housing forming mold provided by an embodiment of the present invention;

[0048] Figure 5 is a structural schematic diagram of the lower mold body in a connector housing forming mold provided by an embodiment of the present invention;

[0049] Figure 6 is a structural schematic diagram of the installation of the insert pin in a connector housing forming mold provided by an embodiment of the present invention;

[0050] Figure 7 is Figure 6 an enlarged schematic view of part A;

[0051] Figure 8 is a front view cross-sectional view of the mold core assembly in a connector housing forming mold provided by an embodiment of the present invention;

[0052] Figure 9 is a top view cross-sectional view of the upper mold body in a connector housing forming mold provided by an embodiment of the present invention;

[0053] Figure 10 is a top view cross-sectional view of the lower mold body in a connector housing forming mold provided by an embodiment of the present invention.

[0054] The description of the reference numerals is as follows:

[0055] 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; 34. Second through cavity; 35. First core pin; 36. First limit block; 37. Second core pin; 38. Third core pin; 39. Second limit block; 4. Shaping block; 41. Second lower cavity; 42. Third through cavity; 43. Third counterbore; 5. Insert pin; 51. Positioning post; 52. Insertion post; 53. Through groove; 6. Nut. Detailed implementation mode

[0056] Hereinafter, exemplary embodiments of the present invention will be described in more detail with reference to the accompanying 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 fully conveyed to those skilled in the art.

[0057] As Figures 1 to 10 shown, an embodiment of the present invention provides a connector housing forming mold, including:

[0058] An upper die body 1, on the bottom surface of the upper die body 1, 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;

[0059] A die core assembly, which is detachably connected in the upper cavity;

[0060] A lower die body 2, on the upper surface of the lower die body 2, 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;

[0061] A plurality of insert pins 5, the bottom ends of the plurality of insert pins 5 penetrate through the upper die body 1 and extend into the lower cavity, the bottom ends of the plurality of insert pins 5 are formed with insertion posts 52, the insertion posts 52 are inserted and connected with nuts 6, and the outer diameter of the insert pins 5 is greater than the inner diameter of the nuts 6.

[0062] In this embodiment, the core assembly is installed in the upper cavity, and a plurality of nuts 6 are inserted outside a plurality of insertion posts 52; the upper mold body 1 and the lower mold body 2 are closed; the closed upper mold body 1 and lower mold body 2 are poured with raw materials through the pouring hole 11, the first diversion cavity 14 and the second diversion cavity 21; the closed upper mold body 1 and lower mold body 2 are pressurized and heated and cured by the hot pressing die of the hot press to obtain the housing;

[0063] Since the insertion post 52 is inserted and connected with the nut 6, and the outer diameter of the ejector pin 5 is larger than the inner diameter of the nut 6, the nut 6 is positioned in the horizontal direction through the insertion portion 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 misalignment during injection molding, avoiding scrapping, improving the yield rate, and reducing the production cost;

[0064] In this embodiment, two upper cavities and two lower cavities are provided as an example. In specific applications, the upper cavity and the lower cavity can be single or multiple.

[0065] As Figure 7 shown, in an alternative embodiment of the present invention, the outer diameter of the insertion post 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 outside of the insertion post 52. The through groove 53 extends in the radial direction of the insertion post 52 and penetrates the outside and the bottom surface of the insertion post 52.

[0066] In this embodiment, the edge of the bottom end of the insertion post 52 is in a chamfered structure. When the nut 6 is sleeved outside the insertion post 52, due to the through groove 53, the insertion post 52 deforms in its radial direction, facilitating the nut 6 to be sleeved outside the insertion post 52. The insertion post 52 returns to its original state 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 to the nut 6 and avoid the nut 6 from being misaligned and causing encapsulation.

[0067] 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 mold body 2, and the first lower cavity 22 is communicated with the second diversion cavity 21;

[0068] 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 mold body 2;

[0069] The shaping block 4 is inserted and connected in the installation cavity 23. A second lower cavity 41 is formed on the upper surface of the shaping block 4, and the second lower cavity 41 and the first lower cavity 22 form the lower cavity;

[0070] Positioning blocks 26 are arranged 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.

[0071] In this embodiment, through the plug-in connection between the qualitative 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 qualitative block is removed to realize the separation of the housing from the second lower cavity 41, which facilitates the subsequent separation of the housing from the first lower cavity 22 and the demolding of the housing.

[0072] Through the positioning cooperation between the positioning blocks 26 and the positioning grooves 15, the accurate die closing of the upper die body 1 and the lower die body 2 can be ensured.

[0073] In this embodiment, specifically in application, the positioning blocks 26 can be composed of a plurality of unit blocks spliced together, which can further improve the convenience of housing demolding.

[0074] Such as Figure 4 and Figure 5 shown, in an alternative embodiment of the present invention, it further includes:

[0075] A diversion groove 25 formed around the first lower cavity 22;

[0076] 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 communicated with the second diversion cavity 21 or the diversion groove 25.

[0077] 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 raw material pouring, and 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.

[0078] Such as Figure 2 and Figure 3 shown, in an alternative embodiment of the present invention, the upper cavity includes:

[0079] A second upper cavity 131, and the second upper cavity 131 corresponds to the first lower cavity 22;

[0080] A first upper cavity 13, the first upper cavity 13 is located on the inner top surface of the second upper cavity 131, and the die core assembly is located in the first upper cavity 13;

[0081] The inner top surface of the first upper cavity 13 is provided with a plug-in cavity 12, and the plug-in cavity 12 penetrates through the upper surface of the upper die body 1;

[0082] The die core assembly includes:

[0083] A plug-in part 32, and the plug-in part 32 is plugged into the plug-in cavity 12;

[0084] An exposed part 31 formed on the upper part of the plug-in part 32;

[0085] The core body 33 formed at the bottom of the insertion part 32 is located inside the first upper cavity 13.

[0086] In this embodiment, when installing the core mold assembly, hold the exposed part 31, insert the insertion part 32 into the insertion cavity 12, so that the core body 33 is located inside the first upper cavity 13, and complete the installation of the core mold assembly. With the above structure, it is convenient to install and remove the core mold assembly and to demold the shell.

[0087] Such as Figure 2 and Figure 8 As shown in, in an alternative embodiment of the present invention, the core mold assembly further includes:

[0088] A plurality of second core pins 37, the upper ends of the plurality of second core pins 37 are 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 are inserted into a plurality of third through cavities 42 inside the shaping block 4;

[0089] A plurality of first core pins 35, the plurality of first core pins 35 are inserted into the plurality of second through cavities 34, and the bottom ends of the plurality of first core pins 35 are in contact with 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 counter bores 311 on the upper surface of the exposed part 31, and the plurality of second counter bores 311 are communicated with the plurality of second through cavities 34;

[0090] A plurality of third core pins 38, the plurality of third core pins 38 are inserted into the plurality of third through cavities 42, and the upper ends of the plurality of third core pins 38 are in contact with 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 counter bores 43 on the bottom surface of the shaping block 4, and the plurality of third counter bores 43 are communicated with the plurality of third through cavities 42.

[0091] In this embodiment, during installation, insert the plurality of third core pins 38 into the plurality of third through cavities 42 so that the plurality of second limiting blocks 39 enter the plurality of third counter bores 43; insert the bottoms of the plurality of second core pins 37 from the surface of the lower mold body 2 into the 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; insert the plurality of first core pins 35 into the plurality of second through cavities 34 so that the plurality of first limiting blocks 36 enter the plurality of second counter bores 311; close the upper mold body 1 and the lower mold 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 are in contact with the plurality of first core pins 35, and complete the installation of the plurality of first core pins 35, the plurality of second core pins 37 and the plurality of third core pins 38;

[0092] In the above manner, a complete core pin is formed by a plurality of first core pins 35, a plurality of second core pins 37, and a plurality of third core pins 38. After the injection molding of the housing is completed, the upper mold body 1 is separated from the lower mold body 2. The plurality of second core pins 37 are disengaged 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 facilitates the demolding of the housing and the separation of the core pins from the housing, and helps to improve the demolding efficiency.

[0093] 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. The plurality of first counterbores 133 communicate with the plurality of first through cavities 132;

[0094] A plurality of insert pins 5 are inserted and fitted with the plurality of first through cavities 132. A plurality of positioning posts 51 are formed at the upper ends of the plurality of insert pins 5, and the plurality of positioning posts 51 are located in the plurality of first counterbores 133;

[0095] A plurality of positioning holes 221 for inserting and fitting with the plurality of insertion posts 52 are provided on the inner bottom surface of the first lower cavity 22.

[0096] In this embodiment, when installing the plurality of insert pins 5, hold the positioning posts 51 by hand, insert the insert pins 5 into the first through cavities 132, the positioning posts 51 enter the first counterbores 133, the insertion posts 52 are exposed from the bottom surface of the upper mold body 1, and the nut 6 is sleeved outside the insertion posts 52;

[0097] When the upper mold body 1 and the lower mold body 2 are closed, the insertion posts 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;

[0098] In this embodiment, the first counterbore 133 communicates with the insertion cavity 12, which is convenient for taking the positioning posts 51 to remove the insert pins 5; after the insertion portion 32 is inserted into the insertion cavity 12, the exposed portion 31 presses the positioning posts 51 in the first counterbore 133 to realize the fixed limit of the insert pins 5 in the axial direction, further ensuring the stable limit of the nut 6.

[0099] As Figure 9 shown, in an alternative embodiment of the present invention, a first diversion channel 16 is provided inside the upper mold body 1, a first water inlet 17 and a first water outlet 18 are provided outside the upper mold body 1, and the first water inlet 17 and the first water outlet 18 are respectively connected to both ends of the first diversion channel 16.

[0100] In this embodiment, after the heating and pressurization curing is 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 mold body 1.

[0101] As Figure 9 shown, the holes such as a1, a2, a3, etc. on the outer side of the upper mold 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 a sealing plug.

[0102] As Figure 10 shown, in an alternative embodiment of the present invention, a second diversion channel 27 is provided inside the lower mold body 2. A second water inlet 28 and a second water outlet 29 are provided on the bottom surface of the lower mold body 2, and the second water inlet 28 and the second water outlet 29 are respectively communicated with both ends of the second diversion channel 27.

[0103] In this embodiment, after the heating and pressurization curing is 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 mold body 2.

[0104] As Figure 10 shown, the holes such as b1, b2, b3, b4, and b5 on the outer side of the lower mold 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 a sealing plug.

[0105] The usage process of the connector housing forming mold is as follows:

[0106] Insert 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.

[0107] 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 into a 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.

[0108] Hold the positioning post 51, insert the insert pin 5 into the first through cavity 132, the positioning post 51 enters the first counterbore 133, the insertion post 52 is exposed from the bottom surface of the upper mold body 1, and the nut 6 is sleeved outside the insertion post 52.

[0109] Hold the exposed part 31, insert the insertion part 32 into the insertion cavity 12 so that the core body 33 is located in the first upper cavity 13.

[0110] Insert multiple first core pins 35 into multiple second through cavities 34, and make multiple first limit blocks 36 enter multiple second counterbores 311;

[0111] Perform mold clamping of the upper mold body 1 and the lower mold 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 insert 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;

[0112] Pour raw materials through the pouring hole 11, the first diversion cavity 14 and the second diversion cavity 21; Pressurize and heat-cure the upper mold body 1 and the lower mold body 2 that have completed raw material pouring through the hot pressing die of the hot press to obtain the housing;

[0113] In the above embodiments of the present invention, the nut 6 is positioned horizontally through the insertion part 32, and the nut 6 is positioned axially through the insert pin 5, ensuring that the nut 6 is stably located in the lower cavity, avoiding the encapsulation of the nut 6 caused by the misalignment and offset of the nut 6 during injection molding, avoiding scrapping, improving the yield rate, and reducing the production cost.

[0114] The embodiment of the present invention also provides a method for forming a connector housing, which is applied to the connector housing forming mold of any of the above embodiments. The method includes:

[0115] Step 101, connect multiple insert pins 5 to the upper mold body 1, and make multiple insertion posts 52 penetrate the upper cavity;

[0116] Step 102, insert multiple nuts 6 outside multiple insertion posts 52;

[0117] Step 103, install the mold core assembly into the upper cavity;

[0118] Step 104, perform mold clamping on the upper mold body 1 and the lower mold body 2;

[0119] Step 105, pour raw materials into the upper mold body 1 and the lower mold body 2 that have completed mold clamping through the pouring hole 11, the first diversion cavity 14 and the second diversion cavity 21;

[0120] Step 106, pressurize and heat-cure the upper mold body 1 and the lower mold body 2 that have completed raw material pouring through the hot pressing die of the hot press to obtain the connector housing.

[0121] In this embodiment, further, step 101 includes: holding the positioning post 51, inserting the insert pin 5 into the first through cavity 132, and making the positioning post 51 enter the first counterbore 133, and the insertion post 52 exposes from the bottom surface of the upper mold body 1 to complete the installation of multiple insert pins 5;

[0122] 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;

[0123] 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 portion 31 and inserting the insertion portion 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;

[0124] 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 insert 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;

[0125] Further, step 105 includes: pouring raw materials through the pouring hole 11, the first diversion cavity 14 and the second diversion cavity 21; specifically, injecting the raw materials with a temperature within the first preset temperature range into the pouring hole 11 within the first preset pressure range, and gradually filling the lower cavity and the upper cavity with the raw materials 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 materials;

[0126] 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 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 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 keep the temperature 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 used to compensate for the shrinkage of the melt cooling and reduce the 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);

[0127] After step 106, it may further include:

[0128] 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, and completely separate the plug-in part 32 from the plug-in cavity 12, and the core body 33 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 and separate the second core pin 37 from the housing to complete the demolding of the housing; specifically, the above demolding and mold release process can be assisted by a thimble system and an air ejector device;

[0129] Step 108, preliminarily trimming to remove the gate condensate (manual or automatic gate shearing), burrs, and using the cryogenic deburring technology to process precision components; checking for appearance defects (such as sink marks, material shortage, flash, weld lines);

[0130] 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 press-fitted 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);

[0131] 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);

[0132] 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.

[0133] 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 forming die, characterized in that, 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 die core assembly 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 dowel 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 dowel pins (5), and the plug columns (52) are plugged and connected with nuts (6). The outer diameter of the dowel pins (5) is larger than the inner diameter of the nuts (6); A through groove (53) is formed through the outside of the plug column (52). The through groove (53) extends in the radial direction of the plug column (52) and penetrates through the outside and the bottom surface of the plug column (52); A first lower cavity (22) is formed on the surface of the lower die body (2), and the first lower cavity (22) is communicated with the second diversion cavity (21); The upper cavity includes: A second upper cavity (131) corresponding to the first lower cavity (22); A first upper cavity (13) located on the inner top surface of the second upper cavity (131), and the die core assembly is located in the first upper cavity (13); A plug cavity (12) is arranged on the inner top surface of the first upper cavity (13), and the plug cavity (12) penetrates through the upper surface of the upper die body (1); The die core assembly includes: A plug part (32) plugged and connected with the plug cavity (12); An exposed part (31) formed on the upper part of the plug part (32); A core body (33) formed on the bottom of the plug part (32), and the core body (33) is located inside the first upper cavity (13); A plurality of first through cavities (132) are arranged on the inner top surface of the second upper cavity (131), and a plurality of first counterbores (133) are arranged on the upper surface of the upper die body (1). The plurality of first counterbores (133) are communicated with the plurality of first through cavities (132); The plurality of dowel pins (5) are plugged and matched with the plurality of first through cavities (132). A plurality of positioning columns (51) are formed at the upper ends of the plurality of dowel pins (5), and the plurality of positioning columns (51) are located in the plurality of first counterbores (133); A plurality of positioning holes (221) plugged and matched with the plurality of plug columns (52) are arranged on the inner bottom surface of the first lower cavity (22).

2. The connector housing forming die according to claim 1, wherein, The outer diameter of the plug column (52) is 0.1 to 0.2 mm larger than the inner diameter of the nut (6).

3. The forming die for a connector housing according to claim 1, wherein The inner bottom surface of the first lower cavity (22) is provided with an installation cavity (23), and the installation cavity (23) penetrates through 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), and the second lower cavity (41) and the first lower cavity (22) form the lower cavity; Positioning blocks (26) are arranged 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).

4. The connector housing forming die according to claim 3, wherein, 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) communicate with the second diversion cavity (21) or the diversion groove (25).

5. The connector housing forming mold according to claim 3, characterized in that, The mold core assembly further includes: A plurality of second core pins (37), the upper ends of the plurality of second core pins (37) are inserted into a plurality of second through cavities (34) inside the core body (33), and the lower ends of the plurality of second core pins (37) are 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) are inserted into the plurality of second through cavities (34), and the lower ends of the plurality of first core pins (35) are abutted 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 counter bores (311) on the upper surface of the exposed part (31), and the plurality of second counter bores (311) communicate with the plurality of second through cavities (34); A plurality of third core pins (38), the plurality of third core pins (38) are inserted into the plurality of third through cavities (42), and the upper ends of the plurality of third core pins (38) are abutted against the plurality of second core pins (37); a plurality of second limiting blocks (39) are formed at the lower ends of the plurality of third core pins (38), and the plurality of second limiting blocks (39) are located in a plurality of third counter bores (43) on the bottom surface of the shaping block (4), and the plurality of third counter bores (43) communicate with the plurality of third through cavities (42).

6. The connector housing forming die according to claim 1, characterized in that, A first diversion channel (16) is arranged inside the upper die body (1), a first water inlet (17) and a first water outlet (18) are arranged outside the upper die body (1), and the first water inlet (17) and the first water outlet (18) are respectively communicated with two ends of the first diversion channel (16).

7. The connector housing forming die according to claim 1, characterized in that, A second diversion channel (27) is arranged inside the lower die body (2), a second water inlet (28) and a second water outlet (29) are arranged on the bottom surface of the lower die body (2), and the second water inlet (28) and the second water outlet (29) are respectively communicated with two ends of the second diversion channel (27).

8. A method for forming a connector housing, characterized in that, Applied to the connector housing forming mold according to any one of claims 1 to 7, the method includes: Connect a plurality of insert pins (5) to the upper die body (1), and the plurality of insertion columns (52) penetrate through the upper cavity; Insert a plurality of nuts (6) outside the plurality of insertion columns (52); Install the mold core assembly into the upper cavity; Close the upper die body (1) and the lower die body (2); Pour raw materials into the upper die body (1) and the lower die body (2) that have been closed through the pouring hole (11), the first diversion cavity (14) and the second diversion cavity (21); Pressurize and heat the upper die body (1) and the lower die body (2) that have completed raw material pouring through the hot pressing die of the hot press to obtain the connector housing.

Images