A lower mold, an upper mold and a combination of a power plug

Abstract

The present invention provides a lower mold of a power plug, including a lower mold body, a first module is provided at the rear end of the lower mold body, three electrode sheet molds of the power plug are provided at the front of the first module, a second module is provided at the front end of the lower mold body, at least two lower mold areas are provided in the middle of the lower mold body between the first module and the second module, the lower mold area is the main lower mold of the power plug, and a plurality of transversely arranged exhaust grooves are provided on the lower mold body outside the lower mold area, a lower mold feed hole is provided at the center of the lower mold body, the feed hole is connected to the main feed trough, and the main feed trough is connected to the lower mold area through the feed trough, and a lower mold water inlet pipe and a lower mold water outlet pipe are provided at the rear end of the lower mold body, respectively, and the lower mold water inlet pipe and the lower mold water outlet pipe are respectively connected to the inlet and outlet ends of the lower mold water cavity inside the lower mold body. The structures of the upper mold body and the lower mold body match. The mold structure of this scheme is simple and low in cost, and the production process is simplified when used, which improves work efficiency.

Description

Technical Field

[0001] The invention relates to the field of wire material processing, and in particular to a lower mold, an upper mold and a combination thereof of a power plug. Background Art

[0002] like Figure 1 As shown, the power plug has three electrodes, each electrode is provided with an insulating sheet, the length of the insulating sheet is greater than the exposed length of the three electrodes, the positive and negative electrodes 61 have the same structure, the positive and negative insulating sheets 62 have the same structure, and the grounding sheet 63 and the grounding insulating sheet 64 have special structures. For this kind of power plug product, the existing production method is divided into two production stages, the first is to produce the three electrodes with insulating sheets, and the second is to produce the power plug product. This existing method of producing power plug products has the following defects:

[0003] (1) Three independent molds need to be designed. The first set is the positive and negative insulation electrode sheet mold, the second set is the ground insulation electrode sheet mold, and the third set is the power plug product mold. The mold cost is high.

[0004] (2) Long production cycle and low work efficiency;

[0005] (3) The production cost is high, there are many processes involved, and quality is difficult to guarantee.

[0006] In order to solve the above problems, we invented a lower mold, an upper mold and a combination of a power plug. Summary of the invention

[0007] The invention aims to solve the problem that the existing production method of power plugs requires the design of three sets of independent molds, high mold costs, long production cycle, low work efficiency, high labor costs, many processes, and difficult quality assurance. The specific solution is as follows:

[0008] A lower mold of a power plug comprises a lower mold body, a first module is arranged at the rear end of the lower mold body, three electrode sheet molds of the power plug are arranged at the front of the first module, a second module is arranged at the front end of the lower mold body, at least two lower mold areas are arranged in the middle of the lower mold body between the first module and the second module, the lower mold area is the main body lower mold of the power plug, and a plurality of transversely arranged exhaust grooves are arranged on the lower mold body outside the lower mold area, a lower mold feed hole is arranged in the center of the lower mold body, the feed hole is connected to the main feed trough, and the main feed trough is connected to the lower mold area through the feed trough, and a lower mold water inlet pipe and a lower mold water outlet pipe are respectively arranged at the rear end of the lower mold body, and the lower mold water inlet pipe and the lower mold water outlet pipe are respectively connected to the inlet and outlet ends of the lower mold water cavity inside the lower mold body.

[0009] Furthermore, the first module stands horizontally in the first module slot arranged at the rear end of the lower mold body, and its upper half is exposed. The left and right ends of the first module extend out of the lower mold body respectively. The three electrode sheet molds at the front of the first module include three T-shaped positive holes, negative holes, and grounding holes. The positive holes, negative holes, and grounding holes are arranged in a herringbone shape, with the negative hole on the top, the grounding hole on the left, and the positive hole on the right.

[0010] Further, the positive electrode hole includes an upper horizontal positive electrode insulating sheet hole and a lower vertical positive electrode hole connected thereto, the negative electrode hole includes an upper horizontal negative electrode insulating sheet hole and a lower vertical negative electrode hole connected thereto, the grounding hole includes an upper horizontal grounding insulating sheet hole and a lower vertical grounding sheet hole connected thereto, and the right end of the grounding insulating sheet hole is connected to a hole that bends downward and extends horizontally. The hole depths of the positive electrode insulating sheet hole, the negative electrode insulating sheet hole, and the grounding insulating sheet hole are respectively greater than the hole depths of the positive electrode hole, the negative electrode hole, and the grounding sheet hole. The heights of the positive electrode hole and the negative electrode hole are greater than the height of the grounding sheet hole. The positive electrode hole, the negative electrode hole, and the grounding sheet hole are provided with chamfered edges at the outer ends and are trapezoidal at the inner ends. The positive electrode insulating sheet hole, the negative electrode insulating sheet hole, and the grounding insulating sheet hole are provided with chamfered angles at the inner ends.

[0011] Furthermore, vertically upward guide columns are respectively provided at the left and right ends of the first module groove near the lower mold area, the front half of the guide column is embedded in the second semicircular groove of the lower mold body, and the back half of the guide column is embedded in the first semicircular groove of the first module. The upper part of the guide column is higher than the lower mold body, and a vertically upward first positioning column is provided in the center of the first module groove, and the first positioning column penetrates into the first positioning hole in the center of the lower side of the first module.

[0012] Furthermore, the lower mold area matches the lower half structure of the power plug body, and a plurality of arc-shaped convex patterns are provided at the rear of the lower mold area, and the front side of the arc-shaped convex patterns is connected to the grid groove, and a longitudinal strip groove is provided in the grid groove, and a wire arc area is provided on the strip groove, and exhaust grooves are provided on the left and right sides of the lower mold area, and the main feed trough is symmetrically provided with overflow ports on the other side of the lower mold area, and the overflow ports are connected to the exhaust grooves along the edges, and the exhaust grooves along the edges are connected to the exhaust grooves.

[0013] Furthermore, the second module is installed in the second module groove near the front end of the lower mold body by means of front screws. The second module is provided with a semicircular groove for power cord positioning facing the middle of the lower mold area, and a semicircular guide groove for power cord is provided at the front end of the lower mold body facing the semicircular groove for power cord positioning. Concave blocks are provided at the left and right ends of the second module, and upward lower mold positioning holes are provided at the four corners of the lower mold body.

[0014] A upper mold of a power plug comprises an upper mold body, wherein a fourth module groove is provided at the rear end of the upper mold body, at least two elastic columns are provided in the fourth module groove, a longitudinal third semicircular groove is provided on the front side groove wall of the fourth module groove near the left and right ends, a third module is provided at the front end of the upper mold body, at least two upper mold areas are provided in the middle part of the upper mold body between the fourth module groove and the third module, the upper mold area is the main upper mold of the power plug, and a plurality of transversely arranged exhaust grooves are provided on the upper mold body outside the upper mold area, an upper mold feed hole is provided in the center of the upper mold body, the feed hole is connected to the main feed groove, and the main feed groove is connected to the upper mold area through the feed groove, and an upper mold water inlet pipe and an upper mold water outlet pipe are respectively provided at the rear end of the upper mold body, and the upper mold water inlet pipe and the upper mold water outlet pipe are respectively connected to the inlet and outlet ends of the upper mold water cavity inside the upper mold body.

[0015] Furthermore, the upper mold area matches the upper half structure of the power plug body, a U-shaped convex strip is provided at the rear of the upper mold area, a grid groove is provided on the front side of the U-shaped convex strip, a longitudinal strip groove is provided in the grid groove, a wire arc area is provided on the strip groove, and exhaust grooves are provided on the left and right sides of the upper mold area. The main feed trough is symmetrically provided with overflow ports on the other side of the upper mold area, the overflow ports are connected with the exhaust grooves along the edges, and the exhaust grooves along the edges are connected with the exhaust grooves.

[0016] Furthermore, the third module is installed in the third module groove at the front end of the upper mold body by means of front screws. The third module is provided with a power cord positioning semicircular groove facing the middle of the upper mold area, and a power cord semicircular guide groove is provided at the front end of the upper mold body facing the power cord positioning semicircular groove. The left and right ends of the third module are provided with protrusions, and the four corners of the upper mold body are provided with upper mold positioning columns, and the outer end of the upper mold positioning column is truncated cone-shaped.

[0017] A combined mold is composed of an upper mold of the above-mentioned power plug and a lower mold of the above-mentioned power plug, the structures of the upper mold body and the lower mold body match, the fourth module groove is sleeved on the upper half of the first module, the third semicircular groove is sleeved on the front half of the guide column that is higher than the lower mold body, the upper mold positioning column is sleeved into the lower mold positioning hole, the protrusion is embedded in the concave block, and the upper mold area is pressed on top of the lower mold area to form a complete set of power plug mold.

[0018] In summary, the technical solution of the present invention has the following beneficial effects:

[0019] The present invention solves the problem that the existing production method of power plugs needs to design three sets of independent molds, which has high mold cost, long production time cycle, low work efficiency, high labor cost, many processes, and difficult quality assurance. The structural design of the three T-shaped positive electrode holes, negative electrode holes, and grounding holes on the front of the first module of this scheme can cleverly pre-install the positive electrode, negative electrode, and grounding sheet into the positive electrode hole, negative electrode hole, and grounding sheet hole at the lower part of the T-shaped, leaving the positive electrode insulation sheet hole, negative electrode insulation sheet hole, and grounding insulation sheet hole at the upper part of the T-shaped vacant, which is convenient for injection molding. The structural design of the first module is also convenient for demoulding, and it is also convenient to replace power plug products with different electrode plug structures, saving mold costs and shortening the production cycle. The structure of the guide column and the first semicircular groove can protect the front of the first module from being worn when disassembling and assembling the first module, as well as the interface between the lower mold area and the first module groove. The first positioning column, the upper mold positioning column, the bump and other structures ensure the accuracy of the power plug assembly mold. The elastic column ensures that the first module will not be clamped when the upper mold is demoulded. The multiple exhaust grooves arranged can greatly reduce the injection pressure and injection time, thereby improving production efficiency, reducing production costs, reducing the energy consumption of the machine, and the injection molded products will not be delaminated. In short, the mold structure of this scheme is simple and low in cost. When used, it simplifies the production process and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only part of the embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without creative labor.

[0021] Figure 1 It is a structural diagram of a power plug;

[0022] Figure 2 This is a lower mold diagram of a power plug of the present invention;

[0023] Figure 3 This is a partial structural diagram of a lower mold of a power plug of the present invention;

[0024] Figure 4 This is a diagram of an upper mold of a power plug of the present invention.

[0025] Description of reference numerals:

[0026] 1-lower mold body, 2-first module, 3-second module, 4-lower mold area, 5-exhaust groove, 6-feed hole, 7-main feed groove, 8-feeding groove, 9-lower mold water inlet pipe, 10-lower mold water outlet pipe, 11-first module groove, 12-positive electrode insulation sheet hole, 13-positive electrode hole, 14-bevel, 15-negative electrode insulation sheet hole, 16-negative electrode hole, 17-grounding insulation sheet hole, 18-grounding sheet hole, 19-guide column, 20-second semicircular groove, 21-first semicircular groove, 22-first positioning column, 23-first positioning hole, 24-arc convex pattern, 25-grid groove, 26-strip groove, 27-passing line Arc area, 28-overflow port, 29-second module slot, 30-power cord positioning semicircular slot, 31-power cord semicircular guide slot, 32-screw hole, 33-concave block, 34-lower mold positioning hole, 35-upper mold body, 36-fourth module slot, 37-elastic column, 38-third semicircular slot, 39-third module, 40-upper mold area, 41-upper mold water inlet pipe, 42-upper mold water outlet pipe, 43-U-shaped convex strip, 44-third module slot, 45-convex block, 46-upper mold positioning column, 51-edge exhaust groove, 61-positive and negative electrodes, 62-positive and negative insulating sheets, 63-grounding sheet, 64-grounding insulating sheet. DETAILED DESCRIPTION

[0027] The technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In order to make the content of the present invention more easily understood, the following definitions are made: taking the observer as a reference, the observer faces the drawing, the front in the content is the part of the drawing close to the observer, the back in the content is the part of the drawing far from the observer, the left in the content is the part of the drawing located on the left of the observer, the right in the content is the part of the drawing located on the right of the observer, the top in the content is the part of the drawing located above the observer, and the bottom in the content is the part of the drawing located below the observer.

[0029] like Figures 2 to 3As shown, a lower mold of a power plug comprises a lower mold body 1, a first module 2 is provided at the rear end of the lower mold body 1, three electrode sheet molds of the power plug are provided at the front of the first module 2, a second module 3 is provided at the front end of the lower mold body 1, at least two lower mold areas 4 are provided in the middle of the lower mold body 1 between the first module 1 and the second module 3, the lower mold area 4 is the main body lower mold of the power plug, and a plurality of transversely arranged exhaust grooves 5 are provided on the lower mold body 1 outside the lower mold area 4, a lower mold feed hole 6 is provided at the center of the lower mold body 1, the feed hole 6 is connected to the main feed groove 7, and the main feed groove 7 is connected to the lower mold area 4 through the feed groove 8, and a lower mold water inlet pipe and a lower mold water outlet pipe are respectively provided at the rear end of the lower mold body 1, and the lower mold water inlet pipe and the lower mold water outlet pipe are respectively connected to the inlet and outlet ends of the lower mold water cavity (not shown) inside the lower mold body.

[0030] Furthermore, the first module 2 stands horizontally in the first module slot 11 arranged at the rear end of the lower mold body 1, and its upper half is exposed. The left and right ends of the first module 2 extend out of the lower mold body 1 respectively. The three electrode sheet molds at the front of the first module 2 include three T-shaped positive holes, negative holes, and grounding holes. The positive holes, negative holes, and grounding holes are arranged in a triangular shape, with the negative hole on the top, the grounding hole on the left, and the positive hole on the right.

[0031] Further, the positive electrode hole includes an upper horizontal positive electrode insulating sheet hole 12 and a lower vertical positive electrode hole 13 connected thereto, the negative electrode hole includes an upper horizontal negative electrode insulating sheet hole 15 and a lower vertical negative electrode hole 16 connected thereto, and the grounding hole includes an upper horizontal grounding insulating sheet hole 17 and a lower vertical grounding sheet hole 18 connected thereto, and the right end of the grounding insulating sheet hole 17 is connected to a hole that bends downward and then extends horizontally. The hole depths of the positive electrode insulating sheet hole 12, the negative electrode insulating sheet hole 15, and the grounding insulating sheet hole 17 (not shown in the figure) are respectively greater than the hole depths of the positive electrode hole 13, the negative electrode hole 16, and the grounding sheet hole 18 (not shown in the figure). The heights of the positive electrode hole 13 and the negative electrode hole 16 are greater than the height of the grounding sheet hole 18. The positive electrode hole 13, the negative electrode hole 16, and the grounding sheet hole 18 are provided with a chamfered edge 14 at the outer end, and are trapezoidal at the inner end (not shown in the figure). The positive electrode insulating sheet hole 12, the negative electrode insulating sheet hole 15, and the ground insulating sheet hole 17 are provided with chamfered corners (not shown) at the inner ends.

[0032] Furthermore, vertically upward guide columns 19 are respectively provided at the left and right ends of the first module groove 11 near the lower mold area 4, the front half of the guide column 19 is embedded in the second semicircular groove 20 of the lower mold body 4, and the rear half of the guide column 19 is embedded in the first semicircular groove 21 of the first module 2. The upper part of the guide column 19 is higher than the lower mold body 1, and a vertically upward first positioning column 22 is provided in the center of the first module groove 11, and the first positioning column 22 penetrates into the first positioning hole 23 in the center of the lower side of the first module 2.

[0033] Furthermore, the lower mold area 4 matches the lower half structure of the power plug body, and a plurality of arc-shaped convex grooves 24 are provided at the rear of the lower mold area 4. The front side of the arc-shaped convex grooves 24 is connected to the grid grooves 25. The grids of the grid grooves 25 are arranged in a convex and concave staggered manner. A longitudinal strip groove 26 is provided in the grid groove 25, and a wire arc area 27 is provided on the strip groove 26. The left and right sides of the lower mold area 4 are provided with edge exhaust grooves 51, and the main feed groove 7 is symmetrically provided with an overflow port 28 on the other side of the lower mold area 4. The overflow port 28 is connected to the edge exhaust groove 51, and the edge exhaust groove 51 is connected to the exhaust groove 5.

[0034] Furthermore, the second module 3 is installed in the second module groove 29 near the front end of the lower mold body 1 through a front screw (not shown in the figure, the screw is inserted from the screw hole 32 set at the front end of the lower mold body), the second module 3 is provided with a power cord positioning semicircular groove 30 facing the middle of the lower mold area 4, and the front end of the lower mold body 1 is provided with a power cord semicircular guide groove 31 facing the power cord positioning semicircular groove 30, the left and right ends of the second module 3 are provided with recessed blocks 33, and the four corners of the lower mold body 1 are provided with upward lower mold positioning holes 34.

[0035] like Figure 4 As shown, an upper mold of a power plug includes an upper mold body 35, a fourth module groove 36 is provided at the rear end of the upper mold body 35, at least two elastic columns 37 are provided in the fourth module groove 36, and a spring (not shown in the figure) is provided inside the elastic column 37, a longitudinal third semicircular groove 38 is provided near the left and right ends on the front side groove wall of the fourth module groove 36, a third module 39 is provided at the front end of the upper mold body 35, and at least two upper mold areas 40 are provided in the middle of the upper mold body 35 between the fourth module groove 36 and the third module 39, and the upper The mold area 40 is the main upper mold of the power plug. A plurality of transversely arranged exhaust grooves 5 are provided on the upper mold body 35 outside the upper mold area 40. An upper mold feed hole 6 is provided in the center of the upper mold body 35. The feed hole 6 is connected to the main feed groove 7. The main feed groove 7 is connected to the upper mold area 40 through the feed groove 8. An upper mold water inlet pipe 41 and an upper mold water outlet pipe 42 are provided at the rear end of the upper mold body 35. The upper mold water inlet pipe 41 and the upper mold water outlet pipe 42 are respectively connected to the inlet and outlet ends of the upper mold water cavity (not shown in the figure) inside the upper mold body 35.

[0036] Furthermore, the upper mold area 40 matches the upper half structure of the power plug body, a U-shaped convex strip 43 is provided at the rear of the upper mold area 40, a grid groove 25 is provided on the front side of the U-shaped convex strip 43, a longitudinal strip groove 26 is provided in the grid groove 25, a wire arc area 27 is provided on the strip groove 26, and an edge exhaust groove 51 is provided on the left and right sides of the upper mold area 40, and an overflow port 28 is symmetrically provided on the other side of the upper mold area 40 of the main feed trough 7, the overflow port 28 is connected to the edge exhaust groove 51, and the edge exhaust groove 51 is connected to the exhaust groove 5.

[0037] Furthermore, the third module 39 is installed in the third module groove 44 at the front end of the upper mold body 35 through a front screw (not shown in the figure, the screw is inserted from the screw hole 32 set at the front end of the upper mold body 35), the third module 39 is provided with a power cord positioning semicircular groove 30 facing the middle of the upper mold area 40, and the front end of the upper mold body 35 is provided with a power cord semicircular guide groove 31 facing the power cord positioning semicircular groove 30, the left and right ends of the third module 39 are provided with protrusions 45, and the four corners of the upper mold body 35 are provided with upper mold positioning columns 46, and the outer end of the upper mold positioning column 46 is truncated cone-shaped.

[0038] A combined mold is a combination of an upper mold of the above-mentioned power plug and a lower mold of the above-mentioned power plug. The structures of the upper mold body 35 and the lower mold body 1 match each other. The fourth module groove 36 is sleeved on the upper half of the first module 2. The third semicircular groove 38 is sleeved on the guide column 19 higher than the front half of the lower mold body 1. The upper mold positioning column 46 is sleeved into the lower mold positioning hole 34. The protrusion 45 is embedded in the concave block 33. The upper mold area 40 is pressed on the lower mold area 4 to form a complete set of power plug molds. Before using the power plug mold, first put the first module 2 into the first module groove 11 of the lower mold body 1, and then put the power cord with three electrode sheets welded (not shown in the figure) into the three electrode sheet molds and the power cord positioning semicircular groove 30 of the lower mold respectively, and then press the upper mold on the lower mold for injection molding. The finished power plug after injection molding is as follows. Figure 1 shown.

[0039] It should be noted that the front end of the power plug in this embodiment is oval, the rear end of the power plug gradually shrinks, one side of the plug body is a smooth, slightly concave U-shape, and the other side is provided with an arc pattern. In actual application, the lower mold and upper mold of the power plug that match the structural shape of the power plug product can be designed.

[0040] In summary, the technical solution of the present invention has the following beneficial effects:

[0041] The present invention solves the problem that the existing production method of power plugs requires the design of three sets of independent molds, which has high mold costs, long production time cycles, low work efficiency, high labor costs, many processes, and difficult quality assurance. The front of the first module 2 of this solution is provided with three T-shaped positive holes, negative holes, and grounding holes. The structural design can cleverly pre-install the positive electrode, negative electrode, and grounding sheet into the positive electrode hole 13, negative electrode hole 16, and grounding sheet hole 18 at the bottom of the T-shape, leaving the positive insulating sheet hole 12, negative insulating sheet hole 15, and grounding sheet hole 17 at the top of the T-shape vacant, which is convenient for injection molding. The structural design of the first module 2 is also convenient for demoulding, and it is also convenient to replace power plug products with different electrode plug structures, saving mold costs and shortening the production conversion cycle. The structure of the guide column 19 and the first semicircular groove 21 can protect the front of the first module 2 and the interface between the lower mold area 4 and the first module groove 11 from being worn when the first module 2 is disassembled. The first positioning column 22, the upper mold positioning column 46, the protrusion 45 and other structures ensure the accuracy of the power plug assembly mold. The elastic column 37 ensures that the first module 2 will not be clamped when the upper mold is demolded. The multiple exhaust grooves 5 arranged can greatly reduce the injection pressure and injection time, thereby improving production efficiency, reducing production costs, and reducing the energy consumption of the machine, and the injection molded products will not be stratified. In short, the mold structure of this scheme is simple and low in cost. When used, it simplifies the production process and improves work efficiency.

[0042] The above-mentioned implementation modes do not constitute a limitation on the protection scope of the technical solution. Any modification, equivalent replacement and improvement made within the spirit and principle of the above-mentioned implementation modes shall be included in the protection scope of the technical solution.

Claims

1. A lower mold of a power plug, comprising a lower mold body, characterized in that: A first module is provided at the rear end of the lower mold body, three electrode sheet molds of a power plug are provided at the front of the first module, a second module is provided at the front end of the lower mold body, at least two lower mold areas are provided in the middle of the lower mold body between the first module and the second module, the lower mold area is the main body lower mold of the power plug, and a plurality of transversely arranged exhaust grooves are provided on the lower mold body outside the lower mold area, a lower mold feed hole is provided in the center of the lower mold body, the feed hole is connected to the main feed slot, the main feed slot is connected to the lower mold area through the feed slot, a lower mold water inlet pipe and a lower mold water outlet pipe are provided at the rear end of the lower mold body, the lower mold water inlet pipe and the lower mold water outlet pipe are respectively connected to the inlet and outlet ends of the lower mold water cavity inside the lower mold body; the first module stands horizontally in the first module slot provided at the rear end of the lower mold body, and its upper half is exposed, the left and right ends of the first module extend out of the lower mold body respectively, the three electrode sheet molds at the front of the first module include three T-shaped positive holes, negative holes and grounding holes The positive electrode hole, the negative electrode hole and the grounding hole are arranged in a triangular shape, with the negative electrode hole on the top, the grounding hole on the left and the positive electrode hole on the right; the positive electrode hole includes an upper horizontal positive electrode insulating sheet hole and a lower vertical positive electrode hole connected thereto, the negative electrode hole includes an upper horizontal negative electrode insulating sheet hole and a lower vertical negative electrode hole connected thereto, the grounding hole includes an upper horizontal grounding insulating sheet hole and a lower vertical grounding sheet hole connected thereto, and the right end of the grounding insulating sheet hole is connected to a hole that bends downward and extends horizontally; the hole depths of the positive electrode insulating sheet hole, the negative electrode insulating sheet hole and the grounding insulating sheet hole are respectively greater than the hole depths of the positive electrode hole, the negative electrode hole and the grounding sheet hole; the heights of the positive electrode hole and the negative electrode hole are greater than the height of the grounding sheet hole; the positive electrode hole, the negative electrode hole and the grounding sheet hole are provided with chamfered edges at the outer ends and are trapezoidal at the inner ends; the positive electrode insulating sheet hole, the negative electrode hole and the grounding insulating sheet hole are provided with chamfered angles at the inner ends.

2. The lower mold of a power plug according to claim 1, characterized in that: A vertically upward guide column is respectively provided at the left and right ends of the first module groove near the lower mold area, the front half of the guide column is embedded in the second semicircular groove of the lower mold body, and the back half of the guide column is embedded in the first semicircular groove of the first module. The upper part of the guide column is higher than the lower mold body, and a vertically upward first positioning column is provided in the center of the first module groove, and the first positioning column penetrates into the first positioning hole in the center of the lower side of the first module.

3. The lower mold of a power plug according to claim 2, characterized in that: The lower mold area matches the lower half structure of the power plug body, and a plurality of arc-shaped convex patterns are provided at the rear of the lower mold area. The front side of the arc-shaped convex patterns is connected to the grid groove. A longitudinal strip groove is provided in the grid groove, and a wire arc area is provided above the strip groove. Edge exhaust grooves are provided on the left and right sides of the lower mold area, and the main feed trough is symmetrically provided with overflow ports on the other side of the lower mold area. The overflow ports are connected to the edge exhaust grooves, and the edge exhaust grooves are connected to the exhaust grooves.

4. The lower mold of a power plug according to claim 3, characterized in that: The second module is installed in the second module groove near the front end of the lower mold body by means of front screws. The second module is provided with a semicircular groove for positioning the power cord facing the middle of the lower mold area. A semicircular guide groove for the power cord is provided at the front end of the lower mold body facing the semicircular groove for positioning the power cord. Concave blocks are provided at the left and right ends of the second module, and upward lower mold positioning holes are provided at the four corners of the lower mold body.

5. A combined mold, characterized in that: An upper mold of a power plug is combined with a lower mold of a power plug as claimed in claim 4, and the upper mold body of the upper mold matches the lower mold body of the lower mold to form a complete set of power plug mold.

6. A combined mold according to claim 5, characterized in that: The upper mold body is provided with a fourth module groove near the rear end, at least two elastic columns are provided in the fourth module groove, a longitudinal third semicircular groove is provided on the front side groove wall of the fourth module groove near the left and right ends, the upper mold body is provided with a third module near the front end, and at least two upper mold areas are provided in the middle part of the upper mold body between the fourth module groove and the third module. The upper mold area is the main upper mold of the power plug, and a plurality of transversely arranged exhaust grooves are provided on the upper mold body outside the upper mold area. An upper mold feed hole is provided in the center of the upper mold body, and the feed hole is connected to the main feed groove, and the main feed groove is connected to the upper mold area through the feed groove. An upper mold water inlet pipe and an upper mold water outlet pipe are respectively provided at the rear end of the upper mold body, and the upper mold water inlet pipe and the upper mold water outlet pipe are respectively connected to the inlet and outlet ends of the upper mold water cavity inside the upper mold body.

7. A combined mold according to claim 6, characterized in that: The upper mold area matches the upper half structure of the power plug body, a U-shaped convex strip is provided at the rear of the upper mold area, a grid groove is provided on the front side of the U-shaped convex strip, a longitudinal strip groove is provided in the grid groove, a wire arc area is provided on the strip groove, exhaust grooves are provided along the edges on the left and right sides of the upper mold area, and an overflow port is symmetrically provided on the other side of the main feed trough of the upper mold area, the overflow port is connected with the exhaust groove along the edge, and the exhaust groove along the edge is connected with the exhaust groove.

8. A combined mold according to claim 7, characterized in that: The third module is installed in the third module groove at the front end of the upper mold body by means of front screws. The third module is provided with a power cord positioning semicircular groove facing the middle of the upper mold area, and a power cord semicircular guide groove is provided at the front end of the upper mold body facing the power cord positioning semicircular groove. The left and right ends of the third module are provided with protrusions, and the four corners of the upper mold body are provided with upper mold positioning columns, and the outer end of the upper mold positioning column is truncated cone-shaped.

9. A combined mold according to claim 8, characterized in that: The fourth module groove is sleeved on the upper half of the first module, the third semicircular groove is sleeved on the front half of the guide column that is higher than the lower mold body, the upper mold positioning column is sleeved into the lower mold positioning hole, the protrusion is embedded in the concave block, and the upper mold area is pressed on top of the lower mold area.

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