Electric connector shell injection mold

Abstract

The invention relates to the field of electric connector shell injection molding equipment, in particular to an electric connector shell injection mold which is provided with a first insert core and a second insert core, and the second insert core supports the inner wall of the first insert core and compresses a first telescopic spring during injection molding. During demolding, the second telescopic spring drives the first insert core to be separated from the second insert core, then the first telescopic spring drives the abutting block to push the first insert core to be separated from the inverted buckle, and therefore demolding of the inverted buckle arranged on the inner wall of the electric connector shell is achieved.

Description

Technical Field

[0001] The present invention relates to the field of injection molding equipment for the housing of an electrical connector, and particularly to an injection mold for the housing of an electrical connector. Background Art

[0002] An electrical connector is a conductive device for connecting electrical circuits, which can serve as the end points for connecting different components in the same circuit system, or provide power and data connections between different circuit systems and devices. The housing 200 of the electrical connector is prepared by an injection mold. The housing 200 of the electrical connector includes a main body 201 and an undercut 202 provided on the main body 201. The provision of the undercut 202 can facilitate enhancing the connection tightness.

[0003] In the prior art, during injection molding, an injection mold with a lifter mechanism is usually used to inject the housing 200 of the electrical connector with an undercut 202 on its outer wall. However, as Figure 1 shown, the main body 201 of the housing 200 of the electrical connector is hollow, and the undercut 202 is provided on the inner wall of the housing 200 of the electrical connector. When injecting the undercut 202 on the inner wall of the housing 200 of the electrical connector, it is not convenient to use a lifter mechanism, nor is it convenient to perform demolding in the vertical direction. Therefore, it is necessary to design a mold that is convenient for injecting the undercut 202 on the inner wall of the housing 200 of the electrical connector. Summary of the Invention

[0004] The technical solution adopted by the present invention to solve its technical problems is: to provide an injection mold for the housing of an electrical connector, including:

[0005] An upper fixing plate, a first layer plate, and a second layer plate. An upper template is provided on the first layer plate, a lower template is connected to the second layer plate. An upper insert is connected to the upper template. A plurality of sliders are slidably connected to the lower template, and the sliders are connected to a core.

[0006] The lower template is connected to a lower core for placing the housing of the electrical connector. A first insert is provided on the lower core. The lower core, the first insert, the core, and the upper insert cooperate to form a cavity. A pressing block is provided on the outer wall of the first insert. A first telescopic spring is provided on the pressing block. A second insert extending into the first insert is connected to the second layer plate. The second insert and the pressing block respectively support the inner and outer walls of the first insert. The first telescopic spring is used to push the outer wall of the first insert to contract towards the direction close to the central axis of the first insert.

[0007] Further, a second telescopic spring is provided between the second layer plate and the lower template. One end of the second telescopic spring is connected to the second layer plate, and the other end of the second telescopic spring is connected to the lower template. The second telescopic spring is used to support the lower template.

[0008] Furthermore, the first insert is hollow and includes a main body and a deformation part. The deformation part is provided with a plurality of through grooves. The main body is inserted into the first insert and corresponds to the cavity of the injection-molded electrical connector housing body. The second insert is inserted into the deformation part to support the deformation part. The deformation part corresponds to the cavity of the injection-molded undercut. When the telescopic spring is reset, the pressure block pushes the side wall of the deformation part to detach from the undercut.

[0009] Furthermore, the deformation portion is a truncated cone-shaped structure, and the minimum outer diameter of the deformation portion is connected to the main body.

[0010] Furthermore, the inner hole of the deformation portion is a tapered hole, and the second inlet is provided with an outer tapered surface matched with the inner hole of the deformation portion.

[0011] Furthermore, the second layer plate is slidably connected with an ejector plate, the ejector plate is connected with an ejector, the ejector plate is connected to a hydraulic system of an injection molding machine, the lower mold core comprises a core block and a push plate placed on the core block, the injection-molded electrical connector housing is placed on the push plate, and the push plate and the ejector are fixedly connected.

[0012] Furthermore, a guide rod is connected to the lower template, the guide rod is connected to a limiting block, a guide groove is provided on the second plate, the guide rod is slidably arranged in the guide groove, a groove wall of the guide groove is provided with a limiting groove, and the limiting block is slidably arranged in the limiting groove.

[0013] Furthermore, the lower template is provided with a first guide column, the first guide column is connected to a telescopic spring three, the telescopic spring three is connected to the second layer plate, the first guide column is slidably connected to the second layer plate through the telescopic spring three, and the first guide column is slidably connected to the ejector plate.

[0014] Furthermore, the upper template is connected with an inclined ejector rod, the slider is provided with an inclined ejector groove matched with the inclined ejector rod, and the upper template drives the slider to slide away from the electrical connector housing through the inclined ejector rod.

[0015] Furthermore, the second layer plate is connected with a second guide column, and the lower template and the upper template are both provided with guide holes matched with the second guide column, and the second guide column is slidably arranged in the guide hole.

[0016] The beneficial effect of the present invention is that by providing the first insert and the second insert, the second insert supports the inner wall of the first insert and compresses the telescopic spring 1 during injection molding. During demoulding, the first insert is driven to separate from the second insert by the telescopic spring 2, and then the telescopic spring 1 drives the pressing block to push the first insert to separate from the undercut of the electrical connector housing, thereby realizing demoulding of the undercut set on the inner wall of the electrical connector housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] In the figures: Figure 1 is a three-dimensional structural diagram of the electrical connector housing described in the background art;

[0019] Figure 2 is a front view cross-sectional view of an injection mold for an electrical connector housing provided by an embodiment of the present invention;

[0020] Figure 3 is Figure 2 a side view cross-sectional view of the injection mold for the electrical connector housing shown (the first insert and the second insert, as well as the slider are not shown in the figure);

[0021] Figure 4 is Figure 2 a top view of a partial structure when the injection mold for the electrical connector housing shown is demolded;

[0022] Figure 5 is Figure 2 a cross-sectional view of the injection mold for the electrical connector housing shown when demolding the undercut of the electrical connector housing;

[0023] Figure 6 is Figure 2 a cross-sectional view of the injection mold for the electrical connector housing shown when demolding the main body of the electrical connector;

[0024] Figure 7 is Figure 6 an enlarged view at A in

[0025] Figure 8 is Figure 3 a cross-sectional view of the injection mold for the electrical connector housing shown when demolding the main body and the undercut of the electrical connector housing;

[0026] Figure 9 is Figure 3 a cross-sectional view of the injection mold for the electrical connector housing shown when the electrical connector housing is lifted by the ejector pin;

[0027] Figure 10 is Figure 2 a three-dimensional structural diagram of the first insert shown.

[0028] Description of reference numerals: 10, upper fixed plate; 11, upper template; 111, upper insert; 112, inclined ejector rod; 113, guide hole; 12, first layer plate; 21, lower template; 211, slider; 2111, inclined ejector groove; 2112, mold core; 22, lower mold core; 221, sliding groove; 2211, telescopic groove; 2212, telescopic spring 1; 222, mold core block; 223, push plate; 23, first insert; 231, main body; 2311, molding groove; 232, limit table; 23 3. Deformation portion; 2331. Through groove; 2332. Conical hole; 24. Pressure block; 25. Guide rod; 26. Limit block; 27. First guide post; 271. Telescopic spring three; 30. Second layer plate; 31. Second insert; 32. Telescopic spring two; 33. Ejector plate; 331. Ejector; 34. Guide groove; 341. Limit groove; 35. Second guide post; 40. Lower fixing plate; 41. Mold foot; 411. Third layer plate; 200. Electrical connector housing; 201. Main body; 202. Undercut. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention is now described in detail in conjunction with the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basics of the present invention in an illustrative manner, so it only shows the composition related to the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] Please refer to Figure 2 and Figure 3 The embodiment of the present invention provides an injection mold for an electrical connector housing, comprising an upper fixed plate 10, a second layer plate 30, and a lower fixed plate 40. The upper fixed plate 10 is connected to a first layer plate 12, and an upper mold plate 11 is provided on the first layer plate 12. The upper mold plate 11 is connected to an upper insert 111. A mold foot 41 is fixedly connected to the lower fixed plate 40, and a third layer plate 411 for supporting the second layer plate 30 is connected to the mold foot 41. The second layer plate 30 is connected to a lower mold plate 21, and a plurality of sliders 211 are slidably connected to the lower mold plate 21. A mold core 2112 is fixedly connected to the slider 211. During injection molding, the injection mold for the electrical connector housing 200 cooperates with an injection molding machine.

[0031] Please refer to Figure 2 , Figure 3 and Figure 4 The upper template 11 is connected with an inclined ejector rod 112 , and the slider 211 is provided with an inclined ejector groove 2111 adapted to the inclined ejector rod 112 . The upper template 11 drives the slider 211 to slide away from the electrical connector housing 200 through the inclined ejector rod 112 .

[0032] Specifically, in this embodiment, Figure 2 The diameter direction of the cross section of the electrical connector housing 200 shown in the figure is the horizontal direction, the central axis direction of the electrical connector housing 200 is the vertical direction, the upper template 11 and the lower template 21 both move in the vertical direction, and the slider 211 moves in the horizontal direction.

[0033] Please refer to Figure 2 and Figure 3 The lower template 21 is connected to a lower mold core 22 for placing the electrical connector housing 200. The lower mold core 22 cooperates with the mold core and the upper insert 111 to form a cavity. The lower mold core 22 is provided with a sliding groove 221. The sliding groove 221 is provided with a first insert 23. The first insert 23 cooperates with the slider 211 to form a cavity for injection molding the side wall of the electrical connector housing 200. The sliding groove 221 is provided with a plurality of telescopic grooves 2211. The telescopic groove 2211 is provided with a pressing block 24. The telescopic groove 2211 is provided with a telescopic spring 2212. One end of the telescopic spring 2212 is fixedly connected to the pressing block 24, and the other end of the telescopic spring 2212 is fixedly connected to the telescopic groove 2211. The pressing block 24 is used to push the outer wall of the first insert 23 away from the undercut 202 on the electrical connector housing 200. A second inlet 31 penetrating the first inlet 23 is fixedly connected to the second layer plate 30 . The second inlet 31 and the pressing block 24 press the inner and outer walls of the first inlet 23 respectively.

[0034] Please refer to Figure 2 and Figure 3 A telescopic spring 22 is provided between the second layer plate 30 and the lower template 21. One end of the telescopic spring 22 is fixedly connected to the second layer plate 30, and the other end of the telescopic spring 22 is fixedly connected to the lower template 21. When demoulding, the telescopic spring 22 is used to support the lower template 21, so that the lower template 21 and the second layer plate are first separated from each other, and then when demoulding, the lower template 21 drives the first insert 23 to separate from the second insert 31, and the telescopic spring 1 2212 drives the pressing block 24 to push the first insert 23 to separate from the undercut 202. Specifically, the first insert 23 and the second insert 31 are both arranged along the central axis direction of the electrical connector housing 200.

[0035] By providing the first insert 23 and the second insert 31, the second insert 31 supports the inner wall of the first insert 23 during injection molding and compresses the telescopic spring 1 2212. During demoulding, the first insert 23 is driven to separate from the second insert 31 by the telescopic spring 2212, and then the telescopic spring 1 2212 drives the pressing block 24 to push the first insert 23 to separate from the undercut 202 of the electrical connector housing 200, thereby realizing demoulding of the undercut 202 set on the inner wall of the electrical connector housing 200.

[0036] Please refer to Figure 4, the pressing blocks 24 are evenly distributed around the circumference of the first insert 23. Specifically, in this embodiment, there are three pressing blocks 24 and three first expansion springs 2212 corresponding to each other, and the three pressing blocks 24 and the three first expansion springs 2212 are evenly distributed around the outer circumference of the corresponding first insert 23.

[0037] Please refer to Figure 7 and Figure 10 , the first insert 23 is hollow, the first insert 23 includes a main body portion 231 and a deformed portion 233, the deformed portion 233 is provided with a plurality of through grooves 2331, the main body portion 231 penetrates into the first insert 23 and corresponds to the cavity of the main body 201 of the injection molded electrical connector housing 200, the second insert 31 penetrates into the deformed portion 233 to support the deformed portion 233, the deformed portion 233 corresponds to the cavity of the injection molded undercut 202, when the first expansion spring 2212 resets, the pressing block 24 pushes the side wall of the deformed portion 233 away from the undercut 202. Due to the arrangement of the through grooves 2331 on the deformed portion 233, when the first expansion spring 2212 resets, the pressing block 24 has a tendency to push the side wall of the deformed portion 233 to contract towards the central axis of the deformed portion 233, thereby causing the outer wall of the deformed portion 233 to disengage from the injection molded undercut 202 in the horizontal direction.

[0038] Please refer to Figure 10 , there are three through grooves 2331 on the deformed portion 233, the through grooves 2331 divide the deformed portion 233 into three parts, and the three parts respectively correspond to the three undercuts 200 on the electrical connector housing 200. And one end of the through groove 2331 penetrates to the main body portion 231, and three forming grooves 2311 corresponding to the undercuts 200 are opened on the main body portion 231. In the vertical direction, the position of the end of the through groove 2331 on the main body portion 231 is slightly higher than the position of the forming groove 2311.

[0039] Please refer to Figure 10 , the outer contour of the main body portion 231 is a circular tubular structure, the deformed portion 233 is a frustum-shaped structure, and the minimum outer diameter of the deformed portion 233 is connected to the main body portion 231. By setting the outer contour of the deformed portion 233 as a frustum structure, the outer diameter of the deformed portion 233 is larger than the outer diameter of the main body portion 231, thereby facilitating the side wall of the deformed portion 233 to contract and deform inward.

[0040] Please refer to Figure 10The inner hole of the deformation part is a tapered hole, and the second insert 31 is provided with an outer tapered surface adapted to the inner hole of the deformation part. The outer tapered surface and the tapered hole cooperate to facilitate the second insert 31 to penetrate into the first insert 23 and push the inner wall of the first insert 23 to move away from the central axis of the first insert 23, thereby facilitating the pushing block 24 to compress the telescopic spring 2212. The outer surfaces of the first insert 23 and the pressing block 24 that contact each other are both inclined. Due to the different inner diameters of the deformation part and the main body, a limiting table 232 is formed. The setting of the limiting table 232 limits the moving range of the second insert 31 to prevent the second insert 31 from moving too far.

[0041] Please refer to Figure 2 and Figure 3 The second layer plate 30 is slidably connected with an ejector plate 33, the ejector plate 33 is connected with an ejector pin 331, the ejector pin 331 passes through the lower mold plate 21 and contacts the lower mold core 22, and the ejector plate 33 is connected to the hydraulic system of the injection molding machine. The lower mold core 22 includes a mold core block 222 and a push plate 223 placed on the mold core block 222, the injection-molded electrical connector housing 200 is placed on the push plate 223, the push plate 223 and the ejector pin 331 are fixedly connected, and the ejector pin 331 pushes the injection-molded electrical connector housing 200 out by pushing the push plate 223.

[0042] Please refer to Figure 2 During injection molding, the upper mold plate 11 and the lower mold plate 21 are in a closed state through the mold clamping system of the injection molding machine, the telescopic spring 2 32 and the telescopic spring 1 2212 are in a compressed state, the second insert 31 penetrates into the first insert 23, and the second insert 31 and the pressing block 24 cooperate to support the inner and outer walls of the deformed portion of the first insert 23.

[0043] Please refer to Figure 2 , Figure 5 , Figure 6 and Figure 7 When demoulding, the clamping system of the injection molding machine releases the pressing state of the upper template 11, and the telescopic spring 23 drives the lower template 21 to move away from the second layer plate 30, so that the first insert 23 is separated from the second insert 31, and the inner wall of the first insert 23 loses support, and the telescopic spring 23 is reset, driving the pressure block 24 to push the deformed part of the first insert 23 to deform and tighten inward, and the outer wall of the first insert 23 moves horizontally away from the undercut 202, so that the undercut 202 of the electrical connector housing 200 is separated from the first insert 23.

[0044] Please refer to Figure 5 , Figure 6 , Figure 8 and Figure 9, then the injection molding machine drives the upper fixing plate 10 to drive the upper template 11 to move away from the lower template 21. The upper insert 111 is separated from the electrical connector housing 200 as the upper template 11 moves. The upper template 11 drives the lifter rod 112 to move away from the lifter slot 2111, and drives the slider 211 to move away from the electrical connector housing 200 through the cooperation of the lifter slot 2111 and the lifter rod 112, so that the main body 201 of the electrical connector housing 200 is demolded. Finally, the hydraulic system of the injection molding machine drives the ejector plate 33 to move towards the upper template 11, and the ejector pin 331 pushes the lower die core 22 to drive the electrical connector housing 200 to separate from the lower template 21, and the demolding is completed.

[0045] Please refer to Figure 3 and Figure 8 , a guide rod 25 is fixedly connected to the lower template 21, a limit block 26 is connected to the guide rod 25, a guide groove 34 is provided on the second layer plate 30, the guide rod 25 is slidably arranged in the guide groove 34, and a limit groove 341 is provided on the groove wall of the guide groove 34. The limit block 26 is slidably arranged in the limit groove 341. In this embodiment, in order to cooperate with the deformation distance of the second expansion spring 32, the guide groove 34 and the limit groove 341 penetrate through to the third layer plate 411. Through the cooperation of the limit block 26 and the limit groove 341, the moving distance of the lower template 21 driven by the second expansion spring 32 is restricted, so as to avoid the overlong moving distance of the first insert 23 affecting the reset of the first insert 23.

[0046] Please refer to Figure 3 and Figure 8 , a first guide post 27 is provided on the lower template 21, a third expansion spring 271 is connected to the first guide post 27, the third expansion spring 271 is connected to the second layer plate, the first guide post 27 passes through the second layer plate 30 through the third expansion spring 271 and is slidably connected to the second layer plate 30, and the first guide post 27 is slidably connected to the ejector plate 33. Through the arrangement of the first guide post 27 and the third expansion spring 271, a floating connection between the ejector plate 33 and the lower template 21 is realized.

[0047] Please refer to Figure 3 and Figure 8 , a second guide post 35 is fixedly connected to the third layer plate 411, and guide holes 113 adapted to the second guide post 35 are provided on both the lower template 21 and the upper template 11. The second guide post 35 is slidably arranged in the guide holes 113. Through the second guide post 35 and the guide holes 113, the movement of the lower template 21 away from the second layer plate 30 and the mutual separation of the upper template 11 and the lower template 21 are guided.

Claims

1. An injection mold for an electrical connector housing, comprising an upper fixing plate, a first layer plate and a second layer plate. An upper template is provided on the first layer plate, a lower template is connected to the second layer plate, an upper insert is connected to the upper template, and a plurality of sliders are slidably connected to the lower template. The sliders are connected with mold cores. It is characterized in that: The lower template is connected with a lower mold core for placing the electrical connector housing. A first insert is provided on the lower mold core. The lower mold core, the first insert, the mold core and the upper insert cooperate to form a cavity. A pressing block is provided on the outer wall of the first insert, and a first telescopic spring is provided on the pressing block. A second insert extending into the first insert is connected to the second layer plate. The second insert and the pressing block respectively support the inner and outer walls of the first insert. The first telescopic spring is used to push the outer wall of the first insert to contract towards the direction close to the central axis of the first insert.

2. The injection mold for the electrical connector housing according to claim 1, characterized in that: A second telescopic spring is provided between the second layer plate and the lower template. One end of the second telescopic spring is connected to the second layer plate, and the other end of the second telescopic spring is connected to the lower template. The second telescopic spring is used to support the lower template.

3. The injection mold for the electrical connector housing according to claim 1, wherein: The first insert is hollow. The first insert includes a main body part and a deformed part. The deformed part is provided with a plurality of through grooves. The main body part penetrates into the first insert and corresponds to the cavity for injecting the main body of the electrical connector housing. The second insert penetrates into the deformed part to support the deformed part. The deformed part corresponds to the cavity of the injection undercut. When the first telescopic spring is reset, the pressing block pushes the side wall of the deformed part to disengage from the undercut.

4. The injection mold for the electrical connector housing according to claim 3, wherein: The deformed part is in a frustum shape, and the minimum outer diameter of the deformed part is connected to the main body part.

5. The injection mold for the electrical connector housing according to claim 4, characterized in that: The inner hole of the deformed part is a tapered hole, and the second insert is provided with an outer tapered surface adapted to the inner hole of the deformed part.

6. The injection mold for the electrical connector housing according to claim 1, wherein: A thimble plate is slidably connected to the second layer plate. The thimble plate is connected with thimbles. The thimble plate is connected to the hydraulic system of the injection molding machine. The lower mold core includes a mold core block and a push plate placed on the mold core block. The injection-molded electrical connector housing is placed on the push plate, and the push plate is fixedly connected to the thimble.

7. The injection mold for the electrical connector housing according to claim 1, wherein: A guide rod is connected to the lower template, and a limit block is connected to the guide rod. A guide groove is provided on the second layer plate. The guide rod is slidably arranged in the guide groove. A limit groove is provided on the groove wall of the guide groove, and the limit block is slidably arranged in the limit groove.

8. The injection mold for the electrical connector housing according to claim 1, wherein: A first guide post is provided on the lower template. The first guide post is connected with a third telescopic spring, and the third telescopic spring is connected to the second layer plate. The first guide post is slidably connected to the second layer plate through the third telescopic spring, and the first guide post is slidably connected to the thimble plate.

9. The injection mold for the electrical connector housing according to claim 1, characterized in that: An inclined ejector rod is connected to the upper template. The slider is provided with an inclined ejector groove adapted to the inclined ejector rod. The upper template drives the slider to slide away from the electrical connector housing through the inclined ejector rod.

10. The injection mold for the electrical connector housing according to claim 1, characterized in that: The second layer plate is connected with a second guide post. Guide holes adapted to the second guide post are provided on both the lower template and the upper template. The second guide post is slidably arranged in the guide holes.

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