A pre-injection one-shot product and an overmolded two-shot product

Abstract

The present invention discloses a pre-injection one-shot product and a plastic-encapsulated injection two-shot product. The pre-injection one-shot product includes a terminal and at least one plastic body. The plastic body includes a first front side, a first back side and two side surfaces. At least one positioning column is provided on the first front side, the first back side and at least one side surface of the plastic body. The outer periphery of the positioning column is provided with an inner ring melting rib and an outer ring melting rib. The inner ring melting rib and the positioning column and the outer ring melting rib and the inner ring melting rib are kept at a distance. The plastic-encapsulated injection two-shot product includes a coated plastic body provided on the outer periphery of the pre-injection one-shot product. The upper surface of the first positioning column is flush with the upper surface of the coated plastic body, and the upper surface of the second positioning column away from the plastic body is flush with the side surface corresponding to the coated plastic body. The present invention can solve the problems of soft terminal positioning, anti-electrical breakdown and airtightness by first designing a pre-injection one-shot product, adding positioning and melting ribs to prevent leakage, and then performing secondary plastic encapsulation on the pre-injection one-shot product to form a two-shot product.

Description

Technical Field

[0001] The invention relates to the field of embedded injection molded parts design, in particular to a pre-injection molded one-shot product and an overmolded injection molded two-shot product. Background Art

[0002] With the development and popularization of new energy vehicles, automotive electronic products are being used more and more widely. Automotive electronic products cannot do without weak signal transmission and strong current transmission. The copper terminal embedded plastic injection molding that has developed accordingly has also been rapidly developed. Taking advantage of the excellent conductivity of copper terminals and the insulation of plastics, the possibility of complex product design and molding, the use of embedded injection molded parts in automotive electronics is increasing. At the same time, automotive electronic products also have very strict functional requirements for terminal embedded plastic injection molding products, such as air tightness, resistance to electrical breakdown, cold and hot shock, etc. However, the current terminal embedded plastic injection molding products cannot solve the positioning of soft terminals in injection molding products well, and cannot solve the air tightness problem of connector terminals. Summary of the invention

[0003] In order to solve the problems existing in the prior art, the present invention provides a pre-injection one-shot product and an overmolded injection two-shot product to solve the problems of soft terminal positioning, electrical breakdown resistance and airtightness. The technical solution is as follows:

[0004] The present invention provides a pre-injection molded one-shot product and an overmolded injection molded two-shot product, wherein the pre-injection molded one-shot product comprises a terminal and at least one plastic body arranged on the periphery of the terminal, the plastic body is formed by overmolding the periphery of the terminal, both ends of the terminal in the length direction protrude out of the plastic body, the plastic body comprises a first front face, a first back face and two side faces arranged oppositely from left to right, and the terminal has a second front face and a second back face arranged oppositely from top to bottom; at least one positioning column is arranged on the first front face, the first back face and at least one side face of the plastic body, and the axis of the positioning column is perpendicular to the surface of the corresponding plastic body; the pre-injection molded one-shot product also comprises an inner ring molten rib circumferentially surrounding the periphery of the positioning column and an outer ring molten rib arranged on the periphery of the inner ring molten rib, and a spacing is maintained between the inner ring molten rib and the positioning column, and between the outer ring molten rib and the inner ring molten rib.

[0005] Furthermore, at least one first positioning column is disposed on the first front surface and the first back surface of the plastic body, and a second positioning column is disposed on at least one side surface of the plastic body, and the axial centerline direction of the first positioning column is not parallel to the axial centerline direction of the second positioning column;

[0006] A first inner ring melting rib and a first outer ring melting rib arranged on the outer periphery of the first inner ring melting rib are arranged on the outer periphery of the first positioning column; a second inner ring melting rib and a second outer ring melting rib arranged on the outer periphery of the second inner ring melting rib are arranged on the outer periphery of the second positioning column; a distance is maintained between the first inner ring melting rib and the first positioning column, and between the first outer ring melting rib and the first inner ring melting rib; a distance is maintained between the second inner ring melting rib and the second positioning column, and between the second outer ring melting rib and the second inner ring melting rib.

[0007] Furthermore, the height of the first outer ring melting rib from the first front side or the first back side is less than or equal to the height of the first inner ring melting rib from the first front side or the first back side, and the height of the first inner ring melting rib from the first front side or the first back side is less than or equal to the height of the first positioning column from the first front side or the first back side; the height of the second outer ring melting rib from the side side is less than or equal to the height of the second inner ring melting rib from the side side, and the height of the second inner ring melting rib from the side side is less than or equal to the height of the second positioning column from the side side.

[0008] Furthermore, the first positioning column and the second positioning column are both cylindrical structures; the plastic body, the first positioning column, the second positioning column, the first inner ring molten rib, the first outer ring molten rib, the second inner ring molten rib and the second outer ring molten rib all include injection molding materials.

[0009] Furthermore, the first front surface, the second front surface, the first back surface and the second back surface are all arranged in parallel.

[0010] Furthermore, the terminals are arranged in plurality, the plurality of terminals are arranged in parallel, and a connecting rib is arranged between every two adjacent terminals.

[0011] Furthermore, the plastic bodies are arranged in plurality, and a distance is maintained between every two adjacent plastic bodies.

[0012] Furthermore, the plastic body is a cubic structure or a special-shaped structure.

[0013] The present invention also includes a two-shot injection molded product for preventing terminal leakage. The two-shot injection molded product is formed by coating the above-mentioned pre-injection molded product with plastic through a two-shot mold. The two-shot injection molded product includes a coating plastic body arranged on the periphery of the pre-injection molded product. The length of the coating plastic body is less than the length of the terminal, so that both ends of the terminal in the length direction protrude out of the coating plastic body; the upper surface of the first positioning column is flush with the top surface of the coating plastic body, and the second positioning column is flush with the side surface corresponding to the coating plastic body away from the upper surface of the plastic body, and the upper surface of the plastic body and the side surface corresponding to the coating plastic body are located on the same side.

[0014] Furthermore, the shape of the coating plastic body corresponds to the shape of the terminal, and the coating plastic body includes injection molding material.

[0015] The beneficial effects brought by the technical solution provided by the present invention are as follows:

[0016] a. The pre-injection one-shot product provided by the present invention has a positioning column designed on the pre-embedded terminal. The design of the positioning column can ensure the accurate positioning of the pre-embedded one-shot terminal product in the secondary injection mold, solve the problem of inaccurate positioning of ordinary one-shot products in the second shot, and ensure the electrical breakdown conduction, high voltage performance and insulation performance of the terminal from the outside;

[0017] b. The outer periphery of the positioning column is provided with film inner ring melting ribs and film outer ring melting ribs. During the process of secondary injection encapsulation of the pre-injection product, the film melting ribs melt during the secondary encapsulation and merge with the secondary encapsulation plastic to ensure the air tightness of the terminal, so that the plug interface terminal does not leak, thereby ensuring the sealing performance of the product;

[0018] c. The pre-injection molded one-shot product and the overmolded two-shot injection molded product provided by the present invention can solve the problems of soft terminal positioning, resistance to electrical breakdown and air tightness by first designing the pre-injection molded one-shot product, adding positioning and melting ribs to prevent leakage, and then overmolding the pre-injection molded one-shot product for a second time to form an overmolded two-shot injection molded product. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 is a front perspective view of a pre-injection molded one-shot product provided by an embodiment of the present invention;

[0021] Figure 2 The pre-injection one-shot product provided by the embodiment of the present invention Figure 1 A magnified image of ;

[0022] Figure 3 is a reverse perspective view of a pre-injection molded one-shot product provided by an embodiment of the present invention;

[0023] Figure 4 It is a three-dimensional diagram of a two-shot overmolding product provided by an embodiment of the present invention;

[0024] Figure 5 It is a two-shot product of overmolding provided by the embodiment of the present invention. Figure 4 A magnified image of ;

[0025] Figure 6 The positioning column of the two-shot product of the overmolding injection molding provided by the embodiment of the present invention is Figure 4 Enlarged image of .

[0026] Among them, the figure marks include: 1-terminal, 11-second front side, 12-second back side, 13-connecting rib, 2-plastic body, 21-first front side, 22-first back side, 23-side, 3-first positioning column, 31-first inner ring melting rib, 32-first outer ring melting rib, 4-second positioning column, 41-second inner ring melting rib, 42-second outer ring melting rib, 5-coated plastic body, 6-top surface. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only 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 creative work should fall within the scope of protection of the present invention.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, device, product or equipment that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0029] In one embodiment of the present invention, a pre-injection one-shot product is provided. Figure 1 and Figure 3 The pre-injection product includes a terminal 1 and at least one plastic body 2 arranged on the periphery of the terminal 1. The terminal is a copper terminal. The plastic body 2 is formed by injection molding the periphery of the terminal 1, that is, the terminal is placed in an injection molding device for pre-injection molding, and the periphery of the terminal is pre-embedded with plastic. The injection-molded plastic is annularly surrounding the periphery of the terminal 1 to form a plastic body 2. The plastic body 2 does not cover the two end portions of the terminal in the length direction, but includes a portion of the upper surface of the terminal, a portion of the lower surface corresponding to the upper surface, and two side surfaces.

[0030] At least one positioning column is disposed on the first front surface 21, the first back surface 22, and at least one side surface 23. The positioning column structure is shown in FIG. Figure 2 , the axis of the positioning column is perpendicular to the surface of the corresponding plastic body 2; the pre-injection product also includes an inner ring molten rib circumferentially surrounding the outer periphery of the positioning column and an outer ring molten rib arranged on the outer periphery of the inner ring molten rib, and the inner ring molten rib and the positioning column are spaced apart and the outer ring molten rib and the inner ring molten rib are spaced apart. The inner ring molten rib and the outer ring molten rib are both in the form of a film.

[0031] The plastic body 2 includes a first front surface 21 and a first back surface 22 disposed opposite to each other vertically and two side surfaces 23 disposed opposite to each other horizontally. Figure 1 The terminal 1 has a second front side 11 and a second back side 12 which are arranged opposite to each other in the upper and lower parts, and two side surfaces which are arranged opposite to each other in the left and right parts. Preferably, the first front side 21, the second front side 11, the first back side 22 and the second back side 12 are arranged in parallel, the side surface of the plastic body 2 is parallel to the side surface of the terminal, the first front side 21 corresponds to the second front side 11, the first back side 22 corresponds to the second back side 12, and the two side surfaces of the plastic body 2 correspond to the two side surfaces of the terminal 1 respectively.

[0032] When the plastic body 2 is provided in plurality, a distance is maintained between each adjacent two plastic bodies 2; the plastic body 2 may be a square structure or a special-shaped structure, as long as it covers the terminal; the shape of the plastic body 2 is explained as follows: if there is only one terminal, the plastic body 2 is formed by injection molding around the periphery of the terminal 1, that is, the injection-molded plastic is formed around the periphery of the terminal 1 to form the plastic body 2, so that the two ends of the terminal are visible, while the other parts of the terminal cannot be seen because they are covered by the plastic body 2. If there are multiple terminals, a larger area of ​​plastic body 2 is formed by injection molding around the periphery of the terminal 1, so that the two ends of all the terminals are visible, while the other parts of the terminal cannot be seen because they are covered by the plastic body 2.

[0033] At least one first positioning column 3 is disposed on each of the first front surface 21 and the first back surface 22. Figure 2 The axis of the first positioning column 3 is perpendicular to the first front side 21, and a second positioning column 4 is arranged on at least one side 23 of the plastic body 2. The axis of the second positioning column 4 is perpendicular to the side 23. If the first front side 21 is arranged horizontally, the side is arranged vertically. The axis direction of the first positioning column 3 is not parallel to the axis direction of the second positioning column 4. The axis direction of the first positioning column 3 is preferably perpendicular to the axis direction of the second positioning column 4.

[0034] The first positioning column 3 is provided with a first inner ring melting rib 31 and a first outer ring melting rib 32 provided on the outer periphery of the first inner ring melting rib 31. Figure 2 , Figure 5and Figure 6 The second positioning column 4 is provided with a second inner ring melting rib 41 and a second outer ring melting rib 42 provided on the outer periphery of the second inner ring melting rib 41. A spacing is maintained between the first inner ring melting rib 31 and the first positioning column 3, and between the first outer ring melting rib 32 and the first inner ring melting rib 31. A spacing is maintained between the second inner ring melting rib 41 and the second positioning column 4, and between the second outer ring melting rib 42 and the second inner ring melting rib 41. During the secondary encapsulation, the plastic enters the gap between the first inner ring melting rib 31 and the first positioning column 3, the gap between the first outer ring melting rib 32 and the first inner ring melting rib 31, the gap between the second inner ring melting rib 41 and the second positioning column 4, and the gap between the second outer ring melting rib 42 and the second inner ring melting rib 41. The outer ring melting rib and the inner circle melting rib are melted to ensure the sealing performance.

[0035] When the first positioning column 3 is a cylindrical structure, the first inner circle molten rib 31 circumferentially surrounds the outer circumference of the first positioning column 3 to form a first circle, and the first outer circle molten rib 32 circumferentially surrounds the outer circumference of the first inner circle molten rib 31 to form a second circle, and the first positioning column 3, the first circle and the second circle are coaxially arranged, and the center line of the first circle, the center line of the first circle and the center line of the second circle are all arranged perpendicular to the first front side.

[0036] When the second positioning column 4 is a cylindrical structure, the second inner circle molten rib 41 circumferentially surrounds the outer circumference of the second positioning column 4 to form a third circle, and the second outer circle molten rib 42 circumferentially surrounds the outer circumference of the first inner circle molten rib 41 to form a fourth circle. The second positioning column 4, the third circle and the fourth circle are coaxially arranged, and the center line of the third circle, the center line of the third circle and the center line of the fourth circle are all arranged perpendicular to the side.

[0037] The height of the first outer ring melting rib 32 from the first front side 21 or the first back side 22 is lower than or equal to the height of the first inner ring melting rib 31 from the first front side 21 or the first back side 22, and the height of the first inner ring melting rib 31 from the first front side 21 or the first back side 22 is lower than or equal to the height of the first positioning column 3 from the first front side 21 or the first back side 22. Preferably, the height of the first outer ring melting rib 32 from the first front side 21 or the first back side 22 is lower than the height of the first inner ring melting rib 31 from the first front side 21 or the first back side 22, and the height of the first inner ring melting rib 31 from the first front side 21 or the first back side 22 is lower than the height of the first positioning column 3 from the first front side 21 or the first back side 22. The purpose of this design is to provide secondary packaging. During the secondary encapsulation, the first inner ring molten rib 31 and the first outer ring molten rib 32 melt to ensure sealing; if the first inner ring molten rib 31 and the first outer ring molten rib 32 are flush with the first positioning column 3, during the secondary encapsulation, the top of the first positioning column fits the injection cavity, and the plastic cannot enter the gap. In the product formed after the secondary encapsulation, part of the pre-injection product can be seen between the first inner ring molten rib 31 and the first positioning column 3 and between the first outer ring molten rib 32 and the first inner ring molten rib 31 because there is no plastic filled, resulting in leakage. Therefore, the heights of the first outer ring molten rib 32, the first inner ring molten rib 31 and the first positioning column 3 from the surface of the plastic body 2 on the same side increase successively, and can be well welded by the secondary injection of glue to avoid leakage.

[0038] The height of the second outer ring molten rib 42 from the side 23 is lower than or equal to the height of the second inner ring molten rib 41 from the side 23, and the height of the second inner ring molten rib 41 from the side 23 is lower than or equal to the height of the second positioning column 4 from the side 23. Preferably, the height of the second outer ring molten rib 42 from the side 23 is lower than the height of the second inner ring molten rib 41 from the side 23, and the height of the second inner ring molten rib 41 from the side 23 is lower than the height of the second positioning column 4 from the side 23. The design purpose is the same as above.

[0039] The plastic body 2, the first positioning column 3, the second positioning column 4, the first inner ring melting rib 31, the first outer ring melting rib 32, the second inner ring melting rib 41 and the second outer ring melting rib 42 all comprise the same injection molding material, which is a conventional injection molding material that can be purchased on the market.

[0040] When the terminal 1 is provided in plurality, the plurality of terminals 1 are provided in parallel, and a connecting rib 13 is provided between each two adjacent terminals 1. The terminals are connected by the connecting rib 13 when the terminals are embedded in a first-shot product, so as to limit the movement of the terminals during injection molding, and the connecting rib 13 can be cut off by a punching mold after the first-shot product is injection molded.

[0041] The present invention also provides a two-shot injection molded product for preventing terminal leakage. The two-shot injection molded product is formed by coating the above-mentioned pre-injection molded product with plastic through a two-shot mold (finished product mold), that is, plastic is injected between adjacent terminals, between the inner ring molten rib and the positioning column, and between the outer ring molten rib and the inner ring molten rib for secondary coating. The two-shot injection molded product includes a coated plastic body 5 arranged on the periphery of the pre-injection molded product. The coated plastic body 5 includes an injection molding material, which is the same as the material of the plastic body 2, the first positioning column 3, the second positioning column 4, the first inner ring molten rib 31, the first outer ring molten rib 32, the second inner ring molten rib 41 and the second outer ring molten rib 42. The length of the coated plastic body 5 is smaller than the length of the terminal 1, so that both ends of the terminal 1 in the length direction protrude out of the coated plastic body 5, that is, the coated plastic body 5 does not completely cover the terminal 1; the upper surface of the first positioning column 3 is flush with the top surface 6 of the coated plastic body 5, and the upper surface of the second positioning column 4 away from the plastic body 2 is flush with the side corresponding to the coated plastic body 5, and the upper surface of the plastic body 2 and the side corresponding to the coated plastic body 5 are located on the same side, that is, after the secondary encapsulation, the plastic body 2 of the pre-injection product is wrapped and cannot be seen, and only the top of the first positioning column 3 and the second positioning column 4 and the two ends of the terminal can be seen, so that the terminal can be fixed in the left and right directions for limiting, and the terminal of the second shot product after the secondary encapsulation can be ensured to be insulated from the outside.

[0042] The shape of the coating plastic body 5 corresponds to the shape of the terminal 1. Since the coating plastic body 5 is coated on the outside of the terminal 1, if the terminal 1 is a long strip structure, then the coating plastic body 5 is a long strip structure. If the terminal 1 has an inclined structure, the coating plastic body 5 also has an inclined structure.

[0043] The pre-injection one-shot product of the embedded terminal designed by the present invention can ensure the positioning of the embedded terminals, ensure that the thickness of the glue filling the pores between the terminals is the same, and ensure the electrical breakdown performance of the terminals.

[0044] The pre-injection molded one-shot product provided by the present invention is designed with a positioning column on the pre-embedded terminal. The design of the positioning column can ensure the accurate positioning of the pre-embedded one-shot product of the terminal in the secondary injection mold, solve the problem of inaccurate positioning of ordinary one-shot products in the second shot, and ensure the electrical breakdown conduction, high voltage performance and external insulation performance of the terminal; the inner circle melting ribs of the film and the outer circle melting ribs of the film are arranged on the periphery of the positioning column. In the process of secondary injection encapsulation of the pre-injection molded one-shot product, the film melting ribs melt during the secondary encapsulation and merge with the plastic of the secondary encapsulation, thereby ensuring the air tightness of the terminal, preventing the plug interface terminal from leaking, and further ensuring the sealing performance of the product.

[0045] The pre-injection molded one-shot product and the overmolded two-shot injection molded product provided by the present invention can solve the problems of soft terminal positioning, resistance to electrical breakdown and air tightness by first designing the pre-injection molded one-shot product, adding positioning and melting ribs to prevent leakage, and then overmolding the pre-injection molded one-shot product for a second time to form an overmolded two-shot injection molded product.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pre-injection one-shot product, characterized in that: The invention comprises a terminal (1) and at least one plastic body (2) arranged on the periphery of the terminal (1), wherein the plastic body (2) is formed by plastic encapsulation on the periphery of the terminal (1), and both ends of the terminal (1) in the length direction protrude out of the plastic body (2), and the plastic body (2) comprises a first front surface (21) and a first back surface (22) arranged opposite to each other vertically, and two side surfaces (23) arranged opposite to each other horizontally, and the terminal (1) has a second front surface (11) and a second back surface (12) arranged opposite to each other vertically; At least one positioning column is disposed on the first front surface (21), the first back surface (22), and at least one side surface (23) of the plastic body (2), and the axis of the positioning column is perpendicular to the surface of the corresponding plastic body (2); the pre-injection product further comprises an inner ring molten rib surrounding the outer periphery of the positioning column and an outer ring molten rib disposed on the outer periphery of the inner ring molten rib, and a spacing is maintained between the inner ring molten rib and the positioning column, and between the outer ring molten rib and the inner ring molten rib; At least one first positioning column (3) is disposed on the first front surface (21) and the first back surface (22) of the plastic body (2), and a second positioning column (4) is disposed on at least one side surface (23) of the plastic body (2), wherein the axis centerline direction of the first positioning column (3) is not parallel to the axis centerline direction of the second positioning column (4); The first positioning column (3) is provided with a first inner ring melting rib (31) and a first outer ring melting rib (32) provided on the outer periphery of the first inner ring melting rib (31); the second positioning column (4) is provided with a second inner ring melting rib (41) and a second outer ring melting rib (42) provided on the outer periphery of the second inner ring melting rib (41); a spacing is maintained between the first inner ring melting rib (31) and the first positioning column (3) and between the first outer ring melting rib (32) and the first inner ring melting rib (31); a spacing is maintained between the second inner ring melting rib (41) and the second positioning column (4) and between the second outer ring melting rib (42) and the second inner ring melting rib (41); The first front surface (21), the second front surface (11), the first back surface (22) and the second back surface (12) are all arranged in parallel.

2. The pre-injection one-shot product according to claim 1, characterized in that: The height of the first outer ring molten rib (32) from the first front surface (21) or the first back surface (22) is less than or equal to the height of the first inner ring molten rib (31) from the first front surface (21) or the first back surface (22), and the height of the first inner ring molten rib (31) from the first front surface (21) or the first back surface (22) is less than or equal to the height of the first positioning column (3) from the first front surface (21) or the first back surface (22); the height of the second outer ring molten rib (42) from the side surface (23) is less than or equal to the height of the second inner ring molten rib (41) from the side surface (23), and the height of the second inner ring molten rib (41) from the side surface (23) is less than or equal to the height of the second positioning column (4) from the side surface (23).

3. The pre-injection one-shot product according to claim 1, characterized in that: The first positioning column (3) and the second positioning column (4) are both cylindrical structures; the plastic body (2), the first positioning column (3), the second positioning column (4), the first inner ring molten rib (31), the first outer ring molten rib (32), the second inner ring molten rib (41) and the second outer ring molten rib (42) all comprise injection molding materials.

4. The pre-injection one-shot product according to claim 1, characterized in that: The terminals (1) are arranged in plurality, the plurality of terminals (1) are arranged in parallel, and a connecting rib (13) is arranged between every two adjacent terminals (1).

5. The pre-injection one-shot product according to claim 1, characterized in that: The plastic bodies (2) are arranged in plurality, and a distance is maintained between every two adjacent plastic bodies (2).

6. The pre-injection one-shot product according to claim 1, characterized in that: The plastic body (2) is a cubic structure or a special-shaped structure.

7. A two-shot overmolding product to prevent terminal leakage, characterized in that: The encapsulated injection molded two-shot product is formed by encapsulating the pre-injection molded one-shot product described in any one of claims 1 to 6 with plastic through a two-shot mold, and the encapsulated injection molded two-shot product includes an encapsulated plastic body (5) arranged on the periphery of the pre-injection molded one-shot product, the length of the encapsulated plastic body (5) is less than the length of the terminal (1), so that both ends of the terminal (1) in the length direction protrude out of the encapsulated plastic body (5); the upper surface of the first positioning column (3) is flush with the top surface (6) of the encapsulated plastic body (5), the second positioning column (4) is away from the upper surface of the plastic body (2) and is flush with the side surface corresponding to the encapsulated plastic body (5), and the upper surface of the plastic body (2) and the side surface corresponding to the encapsulated plastic body (5) are located on the same side.

8. The two-shot overmolding product for preventing terminal leakage according to claim 7, characterized in that: The shape of the coating plastic body (5) corresponds to the shape of the terminal (1), and the coating plastic body (5) comprises injection molding material.

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