Plug housing injection mold

Abstract

The present invention discloses a plug housing injection mold in the field of injection mold technology, comprising an ejector plate, an ejector pin, a front mold insert, a rear mold insert, and a panel, a front mold plate, a rear mold plate, a square iron block and a bottom plate arranged in sequence from top to bottom; a front mold core is provided below the front mold plate, a rear mold core is provided above the rear mold plate, the front mold core and the rear mold core are arranged opposite to each other and form a cavity; the front mold core is fixed with a front mold insert, the rear mold core is fixed with a rear mold insert, the rear mold insert is provided with a plurality of mounting holes, the rear mold insert comprises a square portion and a cylindrical portion, the square portion is located in the mounting hole, the outer diameter of the cylindrical portion is greater than the length and width of the square portion; a protrusion is provided on the upper end surface of the mounting hole, and a sinking groove is provided on the upper end surface of the protrusion. Due to the corresponding arrangement of the cylindrical portion, the aperture of the mounting hole with the square portion can be reduced accordingly, thereby increasing the wall thickness between adjacent mounting holes, improving the corresponding strength, improving the wear resistance and impact resistance, and greatly improving the service life of the rear mold insert.

Description

Technical Field

[0001] The invention belongs to the technical field of injection molds, and in particular relates to an injection mold for a plug housing. Background Art

[0002] There are many forms of plug shells, especially for existing new energy vehicles, the plugs are in various forms, and many of them are not of uniform shape and specifications. Fig.12 The plug housing shown has a relatively large overall length, so bubbles are easily formed at the bottom of the product during injection molding, affecting the quality of the product; and the plug housing has many sockets, and the wall thickness between adjacent sockets is relatively small. Therefore, during mold manufacturing, the distance between adjacent pins corresponding to the molded sockets in the mold is very small, resulting in a smaller wall thickness of the corresponding template between adjacent pins, which makes the template easy to break, greatly affecting the service life of the mold. The mold needs to be replaced frequently, which greatly increases the injection molding cost of the plug housing. Summary of the invention

[0003] An object of the present invention is to provide a plug housing injection mold that can solve at least one of the above problems.

[0004] According to one aspect of the present invention, there is provided a plug housing injection mold, comprising an ejector plate, an ejector, a front mold insert pin, a rear mold insert pin, and a panel, a front mold plate, a rear mold plate, a square iron block and a bottom plate arranged in sequence from top to bottom;

[0005] A front mold core is fixed below the front mold plate, and a rear mold core is fixed above the rear mold plate. The front mold core and the rear mold core are arranged opposite to each other to form a cavity.

[0006] A front mold insert is fixed on the front mold core, a rear mold insert is fixed on the rear mold core, one end of the front mold insert pin is fixed on the front mold insert, and the other end extends into the mold cavity, and one end of the rear mold insert pin is fixed on the rear mold insert, and the other end extends into the mold cavity;

[0007] The ejector plate is arranged inside the square iron block, one end of the ejector is fixed on the ejector plate, and the other end can penetrate the rear mold plate and the rear mold insert and then extend into the mold cavity;

[0008] There are multiple front mold insert pins and rear mold insert pins. The rear mold insert is provided with multiple mounting holes. One end of the rear mold insert pin is fixed in the mounting hole and is arranged one by one corresponding to the mounting holes.

[0009] The rear mold insert pin includes a square portion and a cylindrical portion, the cylindrical portion is located above the square portion, the mounting hole is a square hole, the square portion is located in the mounting hole and matches the mounting hole, the cylindrical portion is located above the mounting hole, and the outer diameter of the cylindrical portion is greater than the length and width of the square portion;

[0010] The upper end surface of the mounting hole is provided with a protrusion, the protrusion is located on the upper end surface of the rear mold insert, and the bottom end of the cylindrical portion abuts against the upper end surface of the protrusion;

[0011] A plurality of sinking grooves are arranged on the upper end surface of the protrusion, and the plurality of sinking grooves are arranged at intervals, and two ends of the sinking grooves are respectively connected with the mold cavity and the mounting hole.

[0012] In some embodiments, a limiting rod is provided in the rear mold insert, and a limiting groove is provided on the side wall of the square portion of each rear mold insert pin, and the limiting rod cooperates with the limiting groove.

[0013] In some embodiments, the injection mold of the plug housing also includes a side insert pin, a first slider, a first oblique guide rod, a first movable block and a first guide block. The first oblique guide rod is tilted, one end of the first oblique guide rod is fixed on the front template, and the other end can pass through the first movable block. The side insert pin is horizontally arranged, and one end is fixed on the first slider, and the other end extends into the cavity. The first slider is arranged on the rear template and is located on one side of the cavity. The first slider is fixedly connected to the first movable block. The top end of the first guide block is fixed on the front template. A first inclined surface is provided on one side of the first guide block. The direction of the first inclined surface is consistent with the inclination direction of the first oblique guide rod. A second inclined surface is provided on the outer side of the first movable block. The first inclined surface can fit with the second inclined surface. The first movable block is located on the rear template.

[0014] In some embodiments, the injection mold of the plug housing also includes a second slider, a first mosaic block, a second oblique guide rod, a second movable block and a second guide block. The second slider is located on the other side of the cavity and is arranged opposite to the first slider. One end of the second oblique guide rod is fixed on the front template, and the other end can pass through the second movable block. The second movable block is located on the rear template. The second slider is fixedly connected to the second movable block. The first mosaic block is fixed on the second slider and cooperates with the cavity. The top end of the second guide block is fixed on the front template. A third inclined surface is provided on the inner side of the second guide block, and a fourth inclined surface is provided on the outer side of the second movable block. The third inclined surface can be fitted with the fourth inclined surface.

[0015] In some embodiments, the plug housing injection mold also includes a third slider assembly and a fourth slider assembly, which are respectively located on two adjacent sides of the first slider, and the third slider assembly and the fourth slider assembly have the same structure, and both cooperate with the cavity.

[0016] In some embodiments, the third slider assembly includes a third slider, a third inclined guide rod, a second mosaic block, a third moving block, a third guide block and a compression spring. The third inclined guide rod is tilted, one end of the third inclined guide rod is fixed on the front template, and the other end can pass through the third moving block. The third moving block is arranged on the rear template, the third slider is fixed to the third moving block and cooperates with the cavity, the second mosaic block is fixed on the third slider and cooperates with the cavity, the top of the third guide block is fixed on the front template and is located on one side of the third moving block, a fifth inclined surface is provided on one side of the third guide block, a sixth inclined surface is provided on the side of the third moving block, the fifth inclined surface can be fitted with the sixth inclined surface, and an installation groove is provided on the third moving block, one end of the compression spring is located in the installation groove, and the other end abuts against the side wall of the rear mold core.

[0017] In some embodiments, the plug housing injection mold also includes a return spring and a mounting rod, one end of the mounting rod is fixed to the ejector plate, and the other end can pass through the rear template, the return spring is sleeved on the mounting rod, one end of the return spring abuts against the ejector plate, and the other end abuts against the rear template.

[0018] In some embodiments, the plug housing injection mold further includes a guide post, one end of which is fixed to the rear template and the other end of which can extend into the front template. A sleeve is fixed in the front template and the guide post can cooperate with the sleeve.

[0019] In some embodiments, a plurality of positioning holes are provided on the rear template, and positioning blocks are provided at the bottom of the first guide block, the second guide block, and the third guide block, and each positioning block can be matched with a corresponding positioning hole.

[0020] The beneficial effects of the plug housing injection mold of the present invention are:

[0021] 1. The rear mold insert includes a square part and a cylindrical part, and the corresponding jack of the plug housing can be formed through the cylindrical part; since the outer diameter of the cylindrical part is greater than the length and width of the square part, the aperture of the mounting hole of the square part can be reduced accordingly, thereby increasing the wall thickness between adjacent mounting holes and improving the corresponding strength, that is, improving the strength of the rear mold insert, improving the wear resistance and impact resistance, and greatly improving the service life of the rear mold insert, thereby helping to reduce the injection molding cost of the workpiece;

[0022] 2. By providing a sinking groove on the upper end surface of the protrusion, during injection molding, the gas in the cavity can be discharged through the sinking groove along the gap between the square part and the mounting hole to achieve exhaust, avoid bubbles remaining in the injection molded part, and improve the molding quality of the product;

[0023] 3. By providing a plurality of sliders, each slider can be moved outward to realize demolding through the guiding effect of the corresponding inclined guide rod during demolding, and demolding is convenient; there are multiple sliders, and each side of the plug housing can be correspondingly molded to meet the molding of the outer wall shape of the product, and the existing conventional injection mold is replaced by multiple parting surfaces for demolding, which simplifies the entire mold structure and greatly reduces the volume of the mold, which is conducive to reducing the cost of the mold.

[0024] 4. By opening a positioning hole on the rear template, it is convenient for locking the mold for injection molding. The positioning hole limits and fixes the positioning block to prevent the sliders from sliding during locking the mold, ensuring the stability during locking the mold, thereby ensuring the injection molding accuracy of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the plug housing injection mold of the present invention in a mold closing state;

[0026] Figure 2 is a schematic diagram of the top view of the injection mold of the plug housing of the present invention;

[0027] Figure 3 yes Figure 2 AA cross-sectional structure diagram;

[0028] Figure 4 yes Figure 2 Schematic diagram of the cross-sectional structure of the middle BB;

[0029] Figure 5 It is a structural schematic diagram of a part of the injection mold structure of the plug housing of the present invention;

[0030] Figure 6 The invention is a schematic structural diagram of the matching of the sliders with the front mold insert and the rear mold insert in the injection mold of the plug housing of the present invention.

[0031] Figure 7 yes Figure 6 Schematic diagram of the top view structure.

[0032] Figure 8 yes Figure 7 Schematic diagram of the CC cross-sectional structure.

[0033] Fig. 9 yes Figure 7 Schematic diagram of DD cross-sectional structure.

[0034] Fig.10 It is a structural schematic diagram of the rear mold core in the injection mold of the plug housing of the present invention.

[0035] Fig.11 It is a structural schematic diagram of a rear mold inserting pin in an injection mold for a plug housing of the present invention.

[0036] Fig.12 It is a structural schematic diagram of a product obtained by injection molding the plug housing injection mold of the present invention. DETAILED DESCRIPTION

[0037] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0038] Reference Figure 1~Figure 4 , Figure 8 , Fig.10 and Fig.11 The plug housing injection mold comprises an ejector plate 1, an ejector 2, a front mold inserting pin 3, a rear mold inserting pin 4, and a panel 5, a front mold plate 6, a rear mold plate 7, a square iron block 8 and a bottom plate 9 which are arranged in sequence from top to bottom.

[0039] A front mold core 10 is fixed to the bottom of the front template 6 by screws, and a rear mold core 20 is fixed to the top of the rear template 7 by screws. The front mold core 10 and the rear mold core 20 are arranged opposite to each other up and down to form a cavity 30; when the mold is injected, the product is injection molded in the cavity 30.

[0040] A front mold insert 11 is fixed on the front mold core 10, and a rear mold insert 12 is fixed on the rear mold core 20. One end of the front mold insert pin 3 is fixed on the front mold insert 11, and the other end extends into the mold cavity 30. One end of the rear mold insert pin 4 is fixed on the rear mold insert 12, and the other end extends into the mold cavity 30. During installation, an installation step is formed at the top of the front mold core 10, and a folded edge is formed outward at the top of the front mold insert 11. The folded edge is located on the installation step. The upper end surface of the front mold insert 11 is flush with the upper end surface of the front mold core 10. Therefore, when the front mold core 10 is locked and fixed with the front mold plate 6, the folded edge of the front mold insert 11 can be clamped and fixed, thereby achieving the fixation of the front mold insert 11 on the front mold core 10. Among them, the fixing method of the rear mold insert 12 on the rear mold core 20 is the same as the fixing method of the front mold insert 11 on the front mold core 10, except that the up and down directions are changed, which will not be repeated here.

[0041] The ejector plate 1 is arranged on the inner side of the square iron block 8, one end of the ejector 2 is fixed on the ejector plate 1, and the other end can penetrate the rear mold plate 7 and the rear mold insert 12 and then extend into the cavity 30; when the ejector 2 moves upward, the product after injection molding in the cavity 30 can be ejected.

[0042] There are multiple front mold insert pins 3 and rear mold insert pins 4. The rear mold insert 12 is provided with multiple mounting holes 121. One end of the rear mold insert pin 4 is fixed in the mounting hole 121 and is arranged one-to-one with the mounting hole 121, that is, one rear mold insert pin 4 is fixed in one mounting hole 121. Among them, the number of front mold insert pins 3 and rear mold insert pins 4 is consistent with the number of jacks in this direction that need to be molded in the plug housing, meeting the injection molding requirements. When the mold is closed, the bottom end of the front mold insert pin 3 matches with the top end of the rear mold insert pin 4, and both are located in the cavity 30. Specifically, an opening 301 is provided at the bottom end of the front mold insert pin 3, and a conical portion 43 is formed on the top surface of the rear mold insert pin 4, and the conical portion 43 is inserted into the opening 301. The outer diameter of the top end of the conical portion 43 is smaller than the outer diameter of the bottom end, which is convenient for better guiding and inserting into the opening 301, and improving the tightness of the fit between the two, thereby facilitating the corresponding plug housing (such as Fig.12 The molding of the corresponding socket in the

[0043] The rear mold insert pin 4 includes a square portion 41 and a cylindrical portion 42, the cylindrical portion 42 is located above the square portion 41, the mounting hole 121 is a square hole, the square portion 41 is located in the mounting hole 121 and matches with the mounting hole 121, the cylindrical portion 42 is located above the mounting hole 121, and the outer diameter of the cylindrical portion 42 is greater than the length and width of the square portion 41. The rear mold insert pin 4 is an integrated molding structure.

[0044] Since the dimensions of the square portion 41 in the length and width directions are smaller than the outer diameter of the cylindrical portion 42, it is helpful to reduce the length and width dimensions of the mounting hole 121, thereby increasing the wall thickness between adjacent mounting holes 121, improving the strength of the rear mold insert, and preventing the side walls of the mounting holes from being damaged during mold locking injection molding, greatly improving the service life of the rear mold insert 12, thereby improving the service life of the entire mold, and helping to reduce the injection molding cost of the product.

[0045] The upper end surface of the mounting hole 121 is formed with a protrusion 13, which is located on the upper end surface of the rear mold insert 12, and the bottom end of the cylindrical portion 42 abuts against the upper end surface of the protrusion 13. Therefore, during injection molding, the cooperation between the protrusion 13 and the cylindrical portion 42 can facilitate the injection molding of the corresponding chamfer of the product insertion hole; at the same time, the cylindrical portion 42 is prevented from being tightly attached to the rear mold insert 12, which facilitates demoulding.

[0046] A plurality of sinking grooves 131 are provided on the upper end surface of the protrusion 13, and the plurality of sinking grooves 131 are arranged at intervals, and the two ends of the sinking grooves 131 are respectively connected to the cavity 30 and the mounting hole 121. There are four sinking grooves 131 on each protrusion 13, which are respectively located at the four vertex corners of the mounting hole 121, so that during injection molding, the gas in the cavity can better enter the vertex corners of the mounting hole 121 through the sinking grooves 131 and then be discharged outward.

[0047] In the actual production process, the depth of the sinking groove 131 is 0.012 mm. Therefore, this depth allows the gas in the cavity 30 to be squeezed out by the injection molding colloid and ensures that the injection molding colloid does not flow out of the sinking groove 131 during injection molding.

[0048] A limiting rod 14 is provided in the rear mold insert 12, and a limiting groove 411 is provided on the side wall of each square portion 41 of the rear mold insert pin 4, and the limiting rod 14 cooperates with the limiting groove 411. The limiting rod 14 is inserted from the side of the rear mold insert 12, and both ends are transversely arranged in the rear mold insert 12, and fixed to the two sides of the rear mold insert pin 4; when the limiting rod 14 is inserted, it cooperates with the limiting groove 411, and the side is inserted into the limiting groove 411, thereby fixing the position of the rear mold insert pin 4.

[0049] The fixing method of the front mold insert pin 3 in the front mold insert 11 is the same as the fixing method of the rear mold insert pin 4 in the rear mold insert 12 .

[0050] like Figure 3~Figure 9 As shown, the plug housing injection mold of the present invention also includes a side insert pin 15, a first slider 16, a first oblique guide rod 17, a first moving block 18 and a first guide block 19. The first oblique guide rod 17 is tilted, one end of the first oblique guide rod 17 is fixed on the front template 6, and the other end can pass through the first moving block 18. The side insert pin 15 is horizontally arranged, and one end is fixed on the first slider 16, and the other end extends into the cavity 30. The first slider 16 is arranged on the rear template 7 and is located on one side of the cavity 30. The first slider 16 is fixedly connected to the first moving block 18. The top end of the first guide block 19 is fixed on the front template 6. A first inclined surface 191 is provided on one side of the first guide block 19. The direction of the first inclined surface 191 is consistent with the inclined direction of the first oblique guide rod 17. A second inclined surface 181 is provided on the outer side of the first moving block 18. The first inclined surface 191 can fit with the second inclined surface 181. The first moving block 18 is located on the rear template 7.

[0051] By providing the side insert pins 15, the jacks on the corresponding side of the plug housing can be injection molded; the number of the side insert pins 15 is increased or decreased according to the number of the jacks on the corresponding side to meet different usage requirements. Each side insert pin 15 is inserted between two adjacent rear mold insert pins 4, and the side insert pin 15 is tightly attached to the rear mold insert pin 4, so that after the product is injection molded, the jacks in two directions can be connected, which is convenient for the subsequent assembly and use of the plug housing.

[0052] Among them, the fixing method of the side insert pin 15 on the first slider 16 is the same as the fixing method of the rear mold insert pin 4 on the rear mold insert. Therefore, the side insert pin 15 can be driven to move synchronously by the first slider 16. Specifically, when the mold is closed, the first inclined surface 191 of the first guide block 19 gradually contacts the second inclined surface 181 of the first moving block 18; as the first guide block 19 is gradually pressed down under the drive of the front template 6, the first guide block 19 pushes the first moving block 18 to gradually move to the side close to the cavity 30; at the same time, the first inclined guide rod 17 also acts on the first moving block 18, pushing the first moving block 18, and limiting the first moving block 18 when it moves into place. The first moving block 18 drives the first slider 16 to move synchronously, and the first slider 16 drives the side insert pin 15 to extend into the cavity 30, and finally extends into place.

[0053] Therefore, through the cooperation of the second inclined surface 181 and the first inclined surface 191, when closing the mold, there is no need for additional power to push the first slider 16 close to the cavity 30, and only the front mold plate 6 needs to close the mold downward to drive the first slider 16 to move, which simplifies the structure of the mold. At the same time, since the first slider 16 is located on the side of the cavity 30, the side of the first slider 16 close to the cavity 30 can form the corresponding side shape of the product. When demolding, the first slider 16 slides away from the side to the side away from the cavity to achieve demolding, without the need to demold according to the number of step surfaces on the side corresponding to the number of parting surfaces, which greatly reduces the structure of the mold and makes demolding more convenient and quick.

[0054] Similarly, when the mold needs to be demolded, the front template 6 moves upward, driving the first inclined guide rod 17 to move upward together. When the first inclined guide rod 17 moves upward, it acts on the first moving block 18, driving the first moving block 18 to move outward; at the same time, the front template 6 drives the first guide block 19 to move upward, so the first inclined surface 191 also gradually moves upward; after the first guide block 19 moves upward, due to the provision of the first inclined surface 191, sufficient space is provided for the first moving block 18 to move outward until the side insert pin 15 is pulled out of the cavity 30 to achieve separation from the product.

[0055] The plug housing injection mold of the present invention also includes a second slider 21, a first mosaic block 22, a second oblique guide rod 23, a second moving block 24 and a second guide block 25. The second slider 21 is located on the other side of the cavity 30 and is arranged opposite to the first slider 16. One end of the second oblique guide rod 23 is fixed to the front template 6, and the other end can pass through the second moving block 24. The second moving block 24 is located on the rear template 7. The second slider 21 is fixedly connected to the second moving block 24. The first mosaic block 22 is fixed to the second slider 21 and cooperates with the cavity 30. The top end of the second guide block 25 is fixed to the front template 6. The inner side of the second guide block 25 is provided with a third inclined surface 251, and the outer side of the second moving block 24 is provided with a fourth inclined surface 241. The third inclined surface 251 can fit with the fourth inclined surface 241.

[0056] In actual use, when closing the mold, the second slider 21 cooperates with the first mosaic block 22 and the cavity 30 to facilitate the molding of the corresponding side walls of the product. The first mosaic block 22 is fixed above the second slider 21 by screws to maintain consistency with the movement of the second slider 21, that is, to maintain consistency in the opening and closing of the mold with the second slider 21.

[0057] When the mold is being closed, the second guide block 25 moves downward together with the front template 6, and the third inclined surface 251 on the second guide block 25 acts on the fourth inclined surface 241 of the second movable block 24, and the second guide block 25 pushes the second movable block 24 to move toward the side of the cavity 30; the second movable block 24 drives the second slider 21 and the first mosaic block 22 to move synchronously toward the side of the cavity, so that the second slider 21 and the first mosaic block 22 are both matched with the cavity 30 to achieve mold closing.

[0058] When the mold needs to be opened, the front template 6 moves upward, driving the second inclined guide rod 23 to move upward. During the movement, it acts on the second moving block 24, driving the second moving block 24 to move to the side away from the cavity 30, thereby realizing the demoulding of the second slider 21 and the first mosaic block 22.

[0059] The plug housing injection mold of the present invention also includes a third slider assembly 26 and a fourth slider assembly 27, which are respectively located on two adjacent sides of the first slider 16. The third slider assembly 26 and the fourth slider assembly 27 have the same structure and both cooperate with the cavity 30.

[0060] The third slider assembly 26 includes a third slider 261, a third oblique guide rod 262, a second mosaic block 263, a third moving block 264, a third guide block 265 and a compression spring 266. The third oblique guide rod 262 is tilted, one end of the third oblique guide rod 262 is fixed to the front template 6, and the other end can pass through the third moving block 264. The third moving block 264 is arranged on the rear template 7. The third slider 261 is fixed to the third moving block 264 and cooperates with the cavity 30. The second mosaic block 263 is fixed to the third slider 261. The third sliding block 261 is on the third slide block 261 and cooperates with the cavity 30. The top of the third guide block 265 is fixed on the front template 6 and is located on one side of the third moving block 264. A fifth inclined surface 267 is provided on one side of the third guide block 265. A sixth inclined surface 268 is provided on the side of the third moving block 264. The fifth inclined surface 267 can be fitted with the sixth inclined surface 268. A mounting groove is provided on the third moving block 264. One end of the compression spring 266 is located in the mounting groove, and the other end is in contact with the side wall of the rear mold core 20.

[0061] The movement mode of the third slider 261 during mold opening and closing is the same as that of the second slider 21, which is to drive the corresponding inclined guide rod and guide block to move through the front template 6, thereby driving the slider to move accordingly. The second mosaic block 263 is fixed to the third slider 261 by screws, so that it can move synchronously with the third slider 261 to achieve matching and separation with the cavity 30.

[0062] By providing a compression spring 266, when the mold is closed, the side of the third movable block 264 with the installation groove is tightly attached to the outer side of the rear mold core 20, so that the compression spring 266 is compressed to the maximum extent; therefore, when the mold is opened, after the external clamping force is withdrawn, the rebound force of the compression spring 266 can push the third movable block 264 to move to the side away from the cavity, thereby better realizing the separation of the third slider 261 and the molded product, which is beneficial to the rapid demolding of the product.

[0063] The third slider assembly 26 has the same structure as the fourth slider assembly 27, which realizes synchronous mold opening and mold closing of each sliding assembly, so as to meet the injection molding requirements of the product.

[0064] In the actual assembly process, a compression spring 266 is also installed between the second moving block 24 and the rear mold core 20, and the compression spring can also play the same role as the compression spring 266 in the third slider assembly 26. The compression spring 266 in the third slider assembly 26 and the fourth slider assembly 27 is not shown in the figure due to the perspective of the cross-sectional view.

[0065] The plug housing injection mold of the present invention also includes a return spring 28 and a mounting rod 29, one end of the mounting rod 29 is fixed on the ejector plate 1, and the other end can pass through the rear template 7, the return spring 28 is sleeved on the mounting rod 29, one end of the return spring 28 abuts against the ejector plate 1, and the other end abuts against the rear template 7.

[0066] The plug housing injection mold of the present invention further includes a guide post 31, one end of which is fixed to the rear template 7, and the other end of which can extend into the front template 6, a sleeve 32 is fixed in the front template 6, and the guide post 31 can cooperate with the sleeve 32. The guide post 31 can guide the movement of the front template 6, so that the front template 6 can be opened and closed accurately.

[0067] The rear template 7 is provided with a plurality of positioning holes 71, and the bottoms of the first guide block 19, the second guide block 25 and the third guide block 265 are all formed with positioning blocks 269, and each positioning block 269 can be matched with the corresponding positioning hole 71. Therefore, when the mold is in place, the front template 6 drives each guide block to move downward to the lowest position, at which time each positioning hole 71 is inserted downward into the corresponding positioning hole 71, and the positioning hole 269 can be limited by the side wall of the positioning hole, which is conducive to improving the mold closing stability of each guide block.

[0068] The opening and closing process of the plug housing injection mold of the present invention is specifically as follows:

[0069] When closing the mold, the front template 6 and the panel 5 move downward, and the front template 6 drives the front mold core 10, the front mold insert 11 and the front mold insert pin 4 downward; when the front template 6 moves to the upper end surface of the rear template 7, the front template 6 moves into place to achieve closing the mold. When the front template 6 moves downward, the side insert pin 15 moves toward the side of the cavity, and the first slider 16, the second slider 21, the first mosaic block 22, the two third sliders 261 and the two second mosaic blocks 263 all move toward the side of the cavity 30, and cooperate with the cavity 30, so that the space in the cavity 30 can be injection molded to obtain the corresponding product. Among them, the specific movement process of each slider during closing the mold has been described in detail above, and will not be repeated here.

[0070] After the injection molding is completed, demolding is performed. During demolding, the front template 6 is driven by external force to move upward, and the front template 6 drives each slider and inlay block to move to the side away from the cavity 30, so that each slider and inlay block are separated from the product; at the same time, the side insert 15 is pulled out from the product. When the front template 6 moves upward, the front mold core 10, the front mold insert 11 and the front mold insert pin 4 also move upward with the front mold core 6, so that the front mold insert pin 4 is separated from the rear mold insert pin, and gradually separated from the product upward. At this time, the product remains in the cavity of the rear mold core 20, and the rear mold insert pin 4 is not separated from the product. Subsequently, the ejector plate 1 moves upward, and the ejector pin 2 moves upward with the ejector plate 1, and the ejector pin 2 extends upward into the cavity, and the ejector pin 2 ejects the product from the cavity to achieve demolding. Among them, the specific movement process of each slider during mold opening has been described in detail above, and will not be repeated here.

[0071] When the ejector plate 1 moves upward, the return spring 28 is gradually compressed under the joint action of the rear mold plate 7 and the ejector plate 1. After the ejector 2 ejects the product, the force acting on the ejector plate 1 is cancelled. At this time, the return spring 28 rebounds. Under the rebound force of the return spring 28, the ejector plate 1 is pushed downward to reset, that is, the ejector 2 is driven to reset downward, so as to facilitate the next ejection and demolding of the product.

[0072] In actual use, there are two cavities, and the structures corresponding to the two cavities are the same, which facilitates the simultaneous opening and closing of the two cavities, so that the two plug shells can be molded in a single time, thereby improving the injection molding efficiency.

[0073] The above are only preferred embodiments of the present invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. Plug housing injection mold, characterized in that: It comprises an ejector plate (1), an ejector (2), a front mold insert pin (3), a rear mold insert pin (4), and a panel (5), a front mold plate (6), a rear mold plate (7), a square iron block (8) and a bottom plate (9) which are arranged in sequence from top to bottom; A front mold core (10) is fixed below the front mold plate (6), and a rear mold core (20) is fixed above the rear mold plate (7); the front mold core (10) and the rear mold core (20) are arranged opposite to each other and form a mold cavity (30); A front mold insert (11) is fixed to the front mold core (10), a rear mold insert (12) is fixed to the rear mold core (20), one end of the front mold insert pin (3) is fixed to the front mold insert (11), and the other end extends into the mold cavity (30), and one end of the rear mold insert pin (4) is fixed to the rear mold insert (12), and the other end extends into the mold cavity (30); The ejector plate (1) is arranged inside the square iron block (8); one end of the ejector (2) is fixed on the ejector plate (1), and the other end is capable of penetrating the rear mold plate (7) and the rear mold insert (12) and then extending into the mold cavity (30); The front mold insert pins (3) and the rear mold insert pins (4) are both multiple, and the rear mold insert (12) is provided with multiple mounting holes (121), and one end of the rear mold insert pin (4) is fixed in the mounting hole (121) and is arranged in a one-to-one correspondence with the mounting hole (121); The rear mold insert pin (4) comprises a square portion (41) and a cylindrical portion (42), the cylindrical portion (42) being located above the square portion (41), the mounting hole (121) being a square hole, the square portion (41) being located inside the mounting hole (121) and matching with the mounting hole (121), the cylindrical portion (42) being located above the mounting hole (121), and the outer diameter of the cylindrical portion (42) being greater than the length and width of the square portion (41); The upper end surface of the mounting hole (121) is provided with a protrusion (13), the protrusion (13) is located on the upper end surface of the rear mold insert (12), and the bottom end of the cylindrical portion (42) abuts against the upper end surface of the protrusion (13); A plurality of sinking grooves (131) are provided on the upper end surface of the protrusion (13), the plurality of sinking grooves (131) are arranged at intervals, and the two ends of the sinking grooves (131) are respectively connected to the mold cavity (30) and the mounting hole (121); A limiting rod (14) is provided inside the rear mold insert (12), and a limiting groove (411) is provided on the side wall of the square portion (41) of each rear mold insert needle (4), and the limiting rod (14) cooperates with the limiting groove (411); The plug housing injection mold further comprises a side insert pin (15), a first slider (16), a first oblique guide rod (17), a first moving block (18) and a first guide block (19); the first oblique guide rod (17) is arranged obliquely; one end of the first oblique guide rod (17) is fixed to the front template (6) and the other end is capable of passing through the first moving block (18); the side insert pin (15) is arranged horizontally, one end of the first oblique guide rod (17) is fixed to the first slider (16) and the other end extends into the cavity (30); the first slider (16) is arranged on the rear template (7) and is located at the cavity (30); On one side, the first sliding block (16) is fixedly connected to the first moving block (18), the top end of the first guiding block (19) is fixed on the front template (6), a first inclined surface (191) is provided on one side of the first guiding block (19), the direction of the first inclined surface (191) is consistent with the inclined direction of the first inclined guide rod (17), a second inclined surface (181) is provided on the outer side of the first moving block (18), the first inclined surface (191) can be fitted with the second inclined surface (181), and the first moving block (18) is located on the rear template (7).

2. The plug housing injection mold according to claim 1, characterized in that: The molded part further comprises a second slider (21), a first mosaic block (22), a second oblique guide rod (23), a second moving block (24) and a second guide block (25); the second slider (21) is located at the other side of the mold cavity (30) and is arranged opposite to the first slider (16); one end of the second oblique guide rod (23) is fixed to the front template (6) and the other end can pass through the second moving block (24); the second moving block (24) is located on the rear template (7); the second slider (21) is fixedly connected to the second moving block (24); the first mosaic block (22) is fixed to the second slider (21) and matches the mold cavity (30); the top end of the second guide block (25) is fixed to the front template (6); a third inclined surface (251) is provided on the inner side of the second guide block (25); a fourth inclined surface (241) is provided on the outer side of the second moving block (24); the third inclined surface (251) can fit with the fourth inclined surface (241).

3. The plug housing injection mold according to claim 2, characterized in that: It also includes a third slider assembly (26) and a fourth slider assembly (27), the third slider assembly (26) and the fourth slider assembly (27) are respectively located on two adjacent sides of the first slider (16), the third slider assembly (26) and the fourth slider assembly (27) have the same structure, and both are matched with the cavity (30).

4. The plug housing injection mold according to claim 3, characterized in that: The third slider assembly (26) comprises a third slider (261), a third oblique guide rod (262), a second mosaic block (263), a third moving block (264), a third guide block (265) and a compression spring (266); the third oblique guide rod (262) is arranged obliquely; one end of the third oblique guide rod (262) is fixed to the front template (6), and the other end can pass through the third moving block (264); the third moving block (264) is arranged on the rear template (7); the third slider (261) is fixed to the third moving block (264) and cooperates with the mold cavity (30); the second mosaic block (263) is fixed to the third moving block (264) and the third guide block (265) is provided on the rear template (7); The third guide block (265) is fixed on the third slider (261) and cooperates with the cavity (30). The top end of the third guide block (265) is fixed on the front template (6) and is located on one side of the third moving block (264). A fifth inclined surface (267) is provided on one side of the third guide block (265). A sixth inclined surface (268) is provided on the side of the third moving block (264). The fifth inclined surface (267) can be fitted with the sixth inclined surface (268). The third moving block (264) is provided with a mounting groove. One end of the compression spring (266) is located in the mounting groove, and the other end is in contact with the side wall of the rear mold core (20).

5. The plug housing injection mold according to any one of claims 1 to 4, characterized in that: It also includes a return spring (28) and a mounting rod (29), one end of the mounting rod (29) is fixed to the ejector plate (1), and the other end is capable of passing through the rear template (7), the return spring (28) is sleeved on the mounting rod (29), one end of the return spring (28) is in contact with the ejector plate (1), and the other end is in contact with the rear template (7).

6. The plug housing injection mold according to claim 5, characterized in that: It also comprises a guide post (31), one end of which is fixed on the rear template (7), and the other end of which can extend into the front template (6). A sleeve (32) is fixed in the front template (6), and the guide post (31) can cooperate with the sleeve (32).

7. The plug housing injection mold according to claim 4, characterized in that: The rear template (7) is provided with a plurality of positioning holes (71), and the bottoms of the first guide block (19), the second guide block (25) and the third guide block (265) are each provided with a positioning block (269), and each positioning block (269) can be matched with a corresponding positioning hole (71).

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