Injection molding mechanism for precision connectors

Abstract

The application provides a precision connector injection molding mechanism, which comprises a fixed mold core, a movable mold core and a nut positioning assembly. The fixed mold core is arranged on a fixed mold, and the fixed mold core is provided with a first upper forming groove. The movable mold core is arranged on a movable mold, and the movable mold core is provided with a first lower forming groove. The nut positioning assembly is installed on the movable mold, and the positioning end of the nut positioning assembly penetrates through the movable mold core to the first lower forming groove. The positioning end of the nut positioning assembly is used for positioning a nut. When the fixed mold and the movable mold are combined, the first upper forming groove, the first lower forming groove and the positioning end of the nut positioning assembly jointly form a forming cavity, and the forming cavity is used for forming a precision connector, so that the precision connector after injection molding is wrapped on the outer peripheral wall of the nut. The precision connector injection molding mechanism can better ensure the position accuracy of the nut installation and improve the production efficiency of the precision connector, and is beneficial to the large-scale production of the precision connector.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to an injection molding mechanism for a precision connector. Background Technology

[0002] Generally, when a nut needs to be installed in a plastic part, the traditional technique is to use manual hot pressing to heat-melt the nut to the plastic part, thereby achieving the purpose of installing the nut into the plastic part.

[0003] like Figure 1 , Figure 2 The plastic part shown is an injection-molded precision connector 10, in which a first connecting hole 11 and a second connecting hole 12 are vertically connected. The second connecting hole 12 is also vertically connected to a nut positioning hole 13 for installing a nut. The first connecting hole 11 and the nut positioning hole 13 are offset. However, if the above-mentioned manual hot-pressing installation method is used to heat-press the nut into the nut positioning hole, it is often difficult to ensure the accuracy of the nut installation position. At the same time, the end face of the nut positioning hole after hot pressing is prone to hot-pressing marks. Moreover, the efficiency of manual hot pressing is low, which is not conducive to the mass production of precision connectors. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an injection molding mechanism for precision connectors that can better ensure the accuracy of nut installation position, improve the production efficiency of precision connectors, and facilitate the large-scale production of precision connectors.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] An injection molding mechanism for a precision connector is disposed between a fixed mold and a moving mold, and is used to injection mold the precision connector when the fixed mold and the moving mold are closed. The injection molding mechanism for the precision connector includes:

[0007] A fixed mold core is disposed in the fixed mold, and the fixed mold core is provided with a first upper forming groove;

[0008] A moving mold core is disposed in the moving mold, and the moving mold core has a first lower forming groove;

[0009] A nut positioning assembly is installed on the moving mold. The positioning end of the nut positioning assembly passes through the moving mold core to the first lower forming groove. The positioning end of the nut positioning assembly is used to position and sleeve the nut.

[0010] When the fixed mold and the moving mold are closed, the first upper molding groove, the first lower molding groove and the positioning end of the nut positioning assembly together form a molding cavity. The molding cavity is used to form the precision connector, so that the precision connector after injection molding covers the outer peripheral wall of the nut.

[0011] In one embodiment, the nut positioning assembly includes an inner pin and an outer pin; the inner pin is fixedly installed on the moving mold fixing plate of the moving mold, the outer pin is fixedly installed on the ejector pin fixing plate of the moving mold, the outer pin is slidably sleeved on the inner pin, both the inner pin and the outer pin penetrate the moving mold core to the first lower forming groove, and the positioning end of the inner pin protrudes from the end face of the outer pin, so that the first upper forming groove, the first lower forming groove, the positioning end of the inner pin and the end face of the outer pin together form the forming cavity.

[0012] In one embodiment, the nut has a connected internal threaded hole and a through hole; the positioning end of the insert pin forms a connected positioning large post and a positioning small post; the internal threaded hole is positioned and sleeved on the positioning large post, and the through hole is positioned and sleeved on the positioning small post.

[0013] In one embodiment, the positioning post is provided with a guide surface.

[0014] In one embodiment, the through hole and the positioning post have a sealing gap, the gap value of which ranges from 0.02 mm to 0.03 mm.

[0015] In one embodiment, the injection molding mechanism of the precision connector further includes a vertical core-pulling assembly, a first horizontal core-pulling assembly, and a second horizontal core-pulling assembly; the vertical core-pulling assembly, the first horizontal core-pulling assembly, and the second horizontal core-pulling assembly are all disposed between the fixed mold and the moving mold, and the molding end of the vertical core-pulling assembly, the molding end of the first horizontal core-pulling assembly, the molding end of the second horizontal core-pulling assembly, the first upper molding groove, the first lower molding groove, the positioning end of the inner pin, and the end face of the outer pin together form the molding cavity, wherein the molding end of the vertical core-pulling assembly is used to mold the second connecting hole.

[0016] In one embodiment, after the fixed mold and the moving mold are closed, the end face of the positioning post abuts perpendicularly against the forming end of the vertical core-pulling assembly.

[0017] In one embodiment, a forming pin is embedded in the fixed mold core, and the forming end of the forming pin penetrates the fixed mold core into the forming cavity. The forming end of the forming pin is used to form a first connecting hole.

[0018] In one embodiment, the injection molding mechanism of the precision connector is a two-cavity mold structure.

[0019] In one embodiment, the vertical core-pulling assembly, the first horizontal core-pulling assembly, and the second horizontal core-pulling assembly are all inclined guide post side core-pulling mechanisms.

[0020] Compared with the prior art, the present invention has at least the following advantages:

[0021] By installing the nut positioning assembly on the moving mold, with its positioning end penetrating through the moving mold core to the first lower forming groove, the nut can be positioned on the positioning end of the nut positioning assembly after the fixed and moving molds open. This allows the precision connector, injection-molded in the forming cavity, to automatically cover the outer periphery of the nut. After cooling and mold opening, a precision connector with the nut installed is obtained. This injection molding mechanism for precision connectors effectively replaces the traditional manual hot-pressing method for nut installation, avoids hot-pressing marks on the end face of the nut positioning hole, and ensures better accuracy in nut installation position. This further improves the production efficiency of precision connectors and facilitates their mass production. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a precision connector;

[0024] Figure 2 This is a cross-sectional view of a precision connector.

[0025] Figure 3 This is a cross-sectional view of the injection molding mechanism of a precision connector in one embodiment;

[0026] Figure 4 for Figure 3 A partial enlarged view of point A in the injection molding mechanism of the precision connector shown;

[0027] Figure 5 for Figure 3 A partial cross-sectional view of the injection molding mechanism of the precision connector shown.

[0028] Figure 6 for Figure 3 An exploded view of the injection molding mechanism of the precision connector shown.

[0029] Figure 7 for Figure 6 A schematic diagram of the fixed mold structure of the injection molding mechanism for the precision connector shown.

[0030] Figure 8 for Figure 7 A partial enlarged view of point B in the injection molding mechanism of the precision connector shown.

[0031] Figure 9 for Figure 7 A schematic diagram of the moving mold structure of the injection molding mechanism for the precision connector shown.

[0032] Reference numerals: Injection molding mechanism 20 for precision connector; fixed mold 100; moving mold 200; fixed mold core 300; first upper molding groove 301; molding cavity 302; molding insert 310; moving mold core 400; first lower molding groove 401; nut positioning assembly 500; inner insert 510; positioning large post 5110; positioning small post 5120; guide surface 5130; outer cylinder pin 520; sealing gap 501; nut 600; internal threaded hole 601; through hole 602; vertical core pulling assembly 700; first horizontal core pulling assembly 800; second horizontal core pulling assembly 900. Detailed Implementation

[0033] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0034] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] This disclosure provides an injection molding mechanism for a precision connector, disposed between a fixed mold and a moving mold, for injection molding a precision connector when the fixed mold and the moving mold are closed. The injection molding mechanism for the precision connector includes a fixed mold core, a moving mold core, and a nut positioning assembly. The fixed mold core is disposed in the fixed mold and has a first upper molding groove; the moving mold core is disposed in the moving mold and has a first lower molding groove; the nut positioning assembly is installed in the moving mold, and the positioning end of the nut positioning assembly passes through the moving mold core to the first lower molding groove, and the positioning end of the nut positioning assembly is used to position and sleeve a nut; when the fixed mold and the moving mold are closed, the first upper molding groove, the first lower molding groove, and the positioning end of the nut positioning assembly together form a molding cavity, which is used to mold the precision connector, so that the injection-molded precision connector covers the outer peripheral wall of the nut.

[0037] Please see Figures 1 to 9 To better understand the injection molding mechanism 10 of the precision connector of this application, the injection molding mechanism 10 of the precision connector will be further explained below:

[0038] An injection molding mechanism 20 for a precision connector according to one embodiment is disposed between a fixed mold 100 and a moving mold 200, and is used to injection mold a precision connector 10 when the fixed mold 100 and the moving mold 200 are closed. The injection molding mechanism 20 for the precision connector includes a fixed mold core 300, a moving mold core 400, and a nut positioning assembly 500. The fixed mold core 300 is disposed on the fixed mold 100, and the fixed mold core 300 has a first upper forming groove 301; the moving mold core 400 is disposed on the moving mold 200, and the moving mold core 400 has a first lower forming groove 401; the nut positioning assembly 500 is installed on the moving mold 200, and the positioning end of the nut positioning assembly 500 passes through the moving mold core 400 to the first lower forming groove 401. The positioning end of the nut positioning assembly 500 is used to position and sleeve the nut 600; when the fixed mold 100 and the moving mold 200 are closed, the first upper forming groove 301, the first lower forming groove 401 and the positioning end of the nut positioning assembly 500 together form a forming cavity 302. The forming cavity 302 is used to form the precision connector 10, so that the precision connector 10 after injection molding covers the outer peripheral wall of the nut 600.

[0039] In this embodiment, by installing the nut positioning component 500 on the moving mold 200, and ensuring that the positioning end of the nut positioning component 500 passes through the moving mold core 400 to the first lower forming groove 401, the nut 600 can be positioned and sleeved on the positioning end of the nut positioning component 500 after the fixed mold 100 and the moving mold 200 are opened. This allows the precision connector 10, which is injection molded in the forming cavity 302, to automatically cover the outer peripheral wall of the nut 600. After cooling and mold opening, the precision connector 10 with the nut 600 installed is obtained. The injection molding mechanism 20 of this precision connector effectively replaces the traditional manual hot-pressing method for installing the nut 600, avoids hot-pressing marks on the end face of the nut positioning hole 13, and better ensures the accuracy of the nut 600's installation position, further improving the production efficiency of the precision connector 10 and facilitating its mass production.

[0040] like Figure 3 , Figure 4 , Figure 5 and Figure 9 As shown, in one embodiment, the nut positioning assembly 500 includes an inner pin 510 and an outer pin 520; the inner pin 510 is fixedly installed on the moving mold fixing plate of the moving mold 200, and the outer pin 520 is fixedly installed on the ejector pin fixing plate of the moving mold 200. The outer pin 520 is slidably sleeved on the inner pin 510. Both the inner pin 510 and the outer pin 520 penetrate the moving mold core 400 to the first lower forming groove 401, and the positioning end of the inner pin 510 protrudes from the end face of the outer pin 520, so that the first upper forming groove 301, the first lower forming groove 401, the positioning end of the inner pin 510, and the end face of the outer pin 520 together form the forming cavity 302.

[0041] It is understood that in this embodiment, the fixed end of the inner insert pin 510 is installed on the moving mold fixing plate of the moving mold 200, and the fixed end of the outer cylinder pin 520 is installed on the ejector pin fixing plate of the moving mold 200. Since the outer cylinder pin 520 is slidably sleeved on the inner insert pin 510, when the mold opens and the ejection action is performed, the ejector rod of the injection molding machine will push the ejector plate and the ejector fixing plate to move, thereby causing the outer cylinder pin 520 to slide out relative to the inner insert pin 510, so that the precision connector 10 and the nut 600 are pushed away from the positioning end of the inner insert pin 510 through the end face of the outer cylinder pin 520, thus completing the demolding action.

[0042] like Figure 2 , Figure 4 and Figure 5As shown, in one embodiment, the nut 600 has a connected internal threaded hole 601 and a through hole 602; the positioning end of the insert pin 510 forms a connected positioning large pin 5110 and a positioning small pin 5120; the internal threaded hole 601 is positioned and sleeved on the positioning large pin 5110, and the through hole 602 is positioned and sleeved on the positioning small pin 5120.

[0043] It is understood that in this embodiment, the internal threaded hole 601 and the through hole 602 of the nut 600 are positioned sequentially by the positioning large post 5110 and the positioning small post 5120, that is, a dual positioning method is adopted, so that after the precision connector 10 is injection molded, it can ensure that the nut 600 has a high installation position accuracy relative to the nut positioning hole 13, so as to avoid a large positional deviation of the nut 600 relative to the nut positioning hole 13.

[0044] like Figure 2 , Figure 4 and Figure 5 As shown, in one embodiment, the positioning post 5120 is provided with a guide surface 5130. This facilitates the positioning of the nut 600 through the through hole 602 onto the positioning post 5120 via the guide surface 5130.

[0045] like Figure 2 , Figure 4 and Figure 5 As shown, in one embodiment, the through hole 602 and the positioning post 5120 have a sealing gap 501, the gap value of which ranges from 0.02mm to 0.03mm.

[0046] It is understood that in this embodiment, a sealing gap 501 is provided between the inner wall of the through hole 602 and the outer wall of the positioning post 5120, so that the extension direction of the sealing gap 501 is the same as the sliding direction of the outer tube needle 520; specifically, the gap value of the sealing gap 501 is set to 0.015mm, so as to better avoid the problem of glue overflow or running at the through hole 602.

[0047] like Figure 1 , Figure 2 and Figure 9As shown, in one embodiment, the injection molding mechanism 20 of the precision connector further includes a vertical core-pulling assembly 700, a first horizontal core-pulling assembly 800, and a second horizontal core-pulling assembly 900; the vertical core-pulling assembly 700, the first horizontal core-pulling assembly 800, and the second horizontal core-pulling assembly 900 are all disposed between the fixed mold 100 and the moving mold 200. The molding end of the vertical core-pulling assembly 700, the molding end of the first horizontal core-pulling assembly 800, the molding end of the second horizontal core-pulling assembly 900, the first upper molding groove 301, the first lower molding groove 401, the positioning end of the inner pin 510, and the end face of the outer cylinder pin 520 together form the molding cavity 302, wherein the molding end of the vertical core-pulling assembly 700 is used to mold the second connecting hole 12.

[0048] It is understood that in this embodiment, the lateral parting structure of the periphery of the precision connector 10 is formed by setting the vertical core-pulling assembly 700, the first horizontal core-pulling assembly 800 and the second horizontal core-pulling assembly 900, such as the second connecting hole 12, other side holes or undercut structure.

[0049] like Figure 2 and Figure 4 As shown, in one embodiment, after the fixed mold 100 and the moving mold 200 are closed, the end face of the positioning post 5120 abuts perpendicularly against the molding end of the vertical core-pulling assembly 700. This ensures that after injection molding, the precision connector 10 achieves perpendicular communication between the second connecting hole 12 and the nut positioning hole 13.

[0050] like Figure 4 , Figure 7 , Figure 8 and Figure 9 As shown, in one embodiment, a molding insert 310 is embedded in the fixed mold core 300. The molding end of the molding insert 310 penetrates the fixed mold core 300 into the molding cavity 302, and the molding end of the molding insert 310 is used to form the first connecting hole 11. That is, the fixed mold core 300 adopts an insert-type structure. The setting of the molding insert 310 facilitates the discharge of gas in the molding cavity 302 through the gap between the molding insert and the fixed mold core 300 during the injection of liquid plastic, reducing the risk of gas entrapment in the product.

[0051] like Figure 9 As shown, in one embodiment, the injection molding mechanism 20 of the precision connector has a two-cavity mold structure. That is, the injection molding mechanism 20 of the precision connector can simultaneously injection mold two precision connectors 10 in one mold closing injection, so as to effectively improve the production efficiency of the precision connectors 10, thereby facilitating the mass production of the precision connectors 10.

[0052] like Figures 6 to 9 As shown, in one embodiment, the vertical core-pulling assembly 700, the first horizontal core-pulling assembly 800, and the second horizontal core-pulling assembly 900 are all inclined guide post-side core-pulling mechanisms. This simplifies the structural design of the core-pulling assembly while ensuring its reliability. The working principles of the vertical core-pulling assembly 700, the first horizontal core-pulling assembly 800, and the second horizontal core-pulling assembly 900 are existing technologies and will not be described in detail here.

[0053] Compared with the prior art, the present invention has at least the following advantages:

[0054] By installing the nut positioning assembly on the moving mold, with its positioning end penetrating through the moving mold core to the first lower forming groove, the nut can be positioned on the positioning end of the nut positioning assembly after the fixed and moving molds open. This allows the precision connector, injection-molded in the forming cavity, to automatically cover the outer periphery of the nut. After cooling and mold opening, a precision connector with the nut installed is obtained. This injection molding mechanism for precision connectors effectively replaces the traditional manual hot-pressing method for nut installation, avoids hot-pressing marks on the end face of the nut positioning hole, and ensures better accuracy in nut installation position. This further improves the production efficiency of precision connectors and facilitates their mass production.

[0055] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An injection molding mechanism for a precision connector, disposed between a fixed mold and a moving mold, for injection molding a precision connector when the fixed mold and the moving mold are closed, characterized in that, The injection molding mechanism of the precision connector includes: A fixed mold core is disposed in the fixed mold, and the fixed mold core is provided with a first upper forming groove; A moving mold core is disposed in the moving mold, and the moving mold core has a first lower forming groove; A nut positioning assembly is installed on the moving mold. The positioning end of the nut positioning assembly passes through the moving mold core to the first lower forming groove. The positioning end of the nut positioning assembly is used to position and sleeve the nut. When the fixed mold and the moving mold are closed, the first upper molding groove, the first lower molding groove and the positioning end of the nut positioning assembly together form a molding cavity. The molding cavity is used to form the precision connector, so that the precision connector after injection molding covers the outer peripheral wall of the nut.

2. The injection molding mechanism for the precision connector according to claim 1, characterized in that, The nut positioning assembly includes an inner pin and an outer pin; the inner pin is fixedly installed on the moving mold fixing plate of the moving mold, and the outer pin is fixedly installed on the ejector pin fixing plate of the moving mold. The outer pin is slidably sleeved on the inner pin. Both the inner pin and the outer pin penetrate the moving mold core to the first lower forming groove, and the positioning end of the inner pin protrudes from the end face of the outer pin, so that the first upper forming groove, the first lower forming groove, the positioning end of the inner pin, and the end face of the outer pin together form the forming cavity.

3. The injection molding mechanism for the precision connector according to claim 2, characterized in that, The nut has a connected internal threaded hole and a through hole; the positioning end of the inner pin forms a connected positioning large post and a positioning small post; the internal threaded hole is positioned and sleeved on the positioning large post, and the through hole is positioned and sleeved on the positioning small post.

4. The injection molding mechanism for the precision connector according to claim 3, characterized in that, The positioning column is provided with a guide surface.

5. The injection molding mechanism for the precision connector according to claim 3, characterized in that, The through hole and the positioning post have a sealing gap, the gap value of which ranges from 0.02mm to 0.03mm.

6. The injection molding mechanism for the precision connector according to claim 3, characterized in that, The injection molding mechanism of the precision connector further includes a vertical core-pulling assembly, a first horizontal core-pulling assembly, and a second horizontal core-pulling assembly; the vertical core-pulling assembly, the first horizontal core-pulling assembly, and the second horizontal core-pulling assembly are all disposed between the fixed mold and the moving mold. The molding end of the vertical core-pulling assembly, the molding end of the first horizontal core-pulling assembly, the molding end of the second horizontal core-pulling assembly, the first upper molding groove, the first lower molding groove, the positioning end of the inner pin, and the end face of the outer cylinder pin together form the molding cavity, wherein the molding end of the vertical core-pulling assembly is used to mold the second connecting hole.

7. The injection molding mechanism for the precision connector according to claim 6, characterized in that, After the fixed mold and the moving mold are closed, the end face of the positioning post abuts perpendicularly to the forming end of the vertical core-pulling assembly.

8. The injection molding mechanism for the precision connector according to claim 6, characterized in that, A forming pin is embedded in the fixed mold core. The forming end of the forming pin passes through the fixed mold core into the forming cavity. The forming end of the forming pin is used to form the first connecting hole.

9. The injection molding mechanism for the precision connector according to claim 8, characterized in that, The injection molding mechanism of the precision connector is a two-cavity mold structure.

10. The injection molding mechanism for the precision connector according to claim 6, characterized in that, The vertical core-pulling assembly, the first horizontal core-pulling assembly, and the second horizontal core-pulling assembly are all inclined guide post side core-pulling mechanisms.

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