Injection molding positioning protection structure and injection mold

Abstract

The application discloses an injection molding positioning protection structure and an injection mold, wherein the injection molding positioning protection structure is applied to the injection mold with an injection cavity, the injection cavity is communicated with a protection cavity, and the positioning protection structure comprises a protection sleeve which is used for being detachably embedded in the protection cavity; a plug-in hole is formed in the protection sleeve and penetrates through the length direction of the protection sleeve, and the plug-in hole is used for detachably inserting an elongated part of a copper terminal. In the process of injection molding, the protection sleeve supports each position of the elongated part of the copper terminal, so that the deformation of the elongated part of the copper terminal can be effectively avoided, and thus the position tolerance of the copper terminal can meet the requirements.

Description

Technical Field

[0001] This invention relates to the field of injection molding technology, specifically to an injection molding positioning and protection structure and an injection mold. Background Technology

[0002] With social development and technological progress, the demand for insert injection molded overmolded parts is increasing. Insert injection molded parts generally consist of copper terminals and insulating plastic material (usually engineering plastics). One type of existing insert injection molded part has copper terminals comprising an integrally formed flat portion and an elongated portion. The insulating plastic layer is disposed on the outer surface of the flat portion. In the injection molding stage, this type of insert injection molded part typically involves placing the copper terminal within a dedicated mold for insertion molding. Traditionally, dedicated molds for injection molding inserts form an injection cavity by interlocking front and rear mold inserts during mold closing. The flat portion of the copper terminal is then placed within this cavity for injection molding to obtain the insert injection molded part. However, during the injection molding process using traditional dedicated molds, the elongated portion of the copper terminal is prone to deformation, making it impossible to guarantee the positional tolerance of the copper terminal, resulting in poor quality of the injection molded insert injection molded part. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the slender part of the copper terminal is easily deformed during the injection molding stage of the special mold used in the injection molding of inserts and injection-coated parts, resulting in poor quality of the injection-molded inserts and injection-coated parts. Thus, the present invention provides an injection molding positioning and protection structure and an injection mold.

[0004] According to a first aspect of the present invention, an injection molding positioning and protection structure is applied to an injection mold having an injection cavity, the injection cavity being connected to a protective cavity. The positioning and protection structure includes a protective sleeve, which is detachably fitted into the protective cavity. An insertion hole is formed through the protective sleeve along its length direction, the insertion hole being detachably inserted into the elongated portion of a copper terminal.

[0005] According to the injection-molded positioning and protection structure of the present invention, at least the following technical effects are achieved:

[0006] By providing insertion holes within the protective sleeve, during the injection molding process of the insert-molded part, the slender portion of the copper terminal is first inserted into the insertion hole, followed by the flat portion of the copper terminal being placed into the injection cavity. Simultaneously, the protective sleeve is fitted into the cavity. Molten hot plastic is then injected into the cavity. During this process, the protective sleeve supports various positions of the slender portion of the copper terminal, effectively preventing deformation and ensuring that the positional tolerances of the copper terminal meet requirements. This, in turn, ensures that the quality of the insert-molded part obtained through the injection mold equipped with this positioning and protective structure meets the requirements. Furthermore, by detachably fitting the protective sleeve into the cavity, during the transfer and handling of the insert-molded part after injection molding, the protective sleeve always surrounds the outer periphery of the slender portion of the copper terminal, better protecting the electroplated layer from scratches and damage during transport.

[0007] Preferably, the insertion hole and the elongated portion are clearance-fitted.

[0008] Preferably, the inner diameter of the insertion hole is 0.01 mm to 0.02 mm larger than the outer diameter of the elongated portion.

[0009] Preferably, the device further includes a positioning insert for installation at the inner bottom of the protective cavity; the protective sleeve has a positioning groove at its lower end along the height direction that matches the positioning insert; during injection molding, the positioning insert is embedded in the positioning groove.

[0010] Preferably, it further includes a spade base, which is used to install on the front mold. The spade base is located on the side of the protective sleeve away from the injection cavity along the length direction of the protective sleeve. The dimension of the positioning groove along the length direction of the protective sleeve is larger than the dimension of the positioning insert along the length direction of the protective sleeve. During injection molding, the spade base abuts against the side of the protective sleeve facing the spade base along the length direction of the protective sleeve, and the positioning insert abuts against the wall of the positioning groove away from the injection cavity along the length direction of the protective sleeve.

[0011] Preferably, the shovel base is inclined upwards along the height direction towards the side of the protective sleeve to form an inclined surface, and the side of the protective sleeve towards the shovel base along the length direction of the protective sleeve is set as a slope surface, and the slope surface matches the inclined surface.

[0012] According to a second aspect of the present invention, an injection mold includes an injection cavity, a protective cavity, and a positioning and protective structure. The injection cavity is used for embedding the flat portion of a copper terminal. The injection cavity and the protective cavity are connected. The positioning and protective structure adopts the positioning and protective structure provided in the first aspect.

[0013] According to an injection mold of the present invention, at least the following technical effects are achieved:

[0014] The positioning and protective structure in this injection mold features insertion holes within a protective sleeve. During the injection molding process of the insert-molded part, the slender portion of the copper terminal is first inserted into the insertion hole, followed by the flat portion of the copper terminal being placed into the injection cavity. Simultaneously, the protective sleeve is fitted into the cavity. Molten hot plastic is then injected into the cavity. Throughout this process, the protective sleeve supports the slender portion of the copper terminal at various points, effectively preventing deformation and ensuring that the positional tolerances of the copper terminal meet requirements. This, in turn, ensures that the quality of the insert-molded part obtained through this injection mold meets the required standards. Furthermore, by detachably fitting the protective sleeve into the cavity, it remains wrapped around the slender portion of the copper terminal during transfer and handling after the insert-molded part is formed. This better protects the electroplated layer of the slender portion from scratches and damage during transport.

[0015] Preferably, the system further includes a front mold and a rear mold, wherein the front mold is located above the rear mold along the height direction, and the rear mold can be arranged close to or away from the front mold; the rear mold has a first cavity and a second cavity recessed on its side facing the front mold, the first cavity and the second cavity are connected, and the rear mold is located on one side of the second cavity along the length direction of the protective sleeve; the front mold has a third cavity and a fourth cavity recessed on its side facing the rear mold, the third cavity and the fourth cavity are connected, and the third cavity is located on one side of the fourth cavity along the length direction of the protective sleeve. During injection molding, the first cavity and the third cavity form the injection cavity, and the second cavity and the fourth cavity form the protective cavity.

[0016] Preferably, a rear insert is provided in the first cavity, the rear insert is arranged along the height direction, and a first support groove is provided on the end face of the rear insert facing the front mold. During injection molding, the first support groove is used to support the flat part of the limiting copper terminal.

[0017] Preferably, the end face of the rear mold facing the front mold is provided with an injection runner, one end of which is connected to the injection cavity and the other end is used to connect to the main runner.

[0018] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a protective sleeve in an injection-molded positioning and protective structure according to an embodiment of the present invention, fitted onto an insert injection-molded overmolded part;

[0021] Figure 2 This is a schematic diagram of a structure for assembling copper terminals onto an injection-molded positioning and protective structure according to this embodiment;

[0022] Figure 3 for Figure 2 A schematic diagram of the front view of the cross-section structure;

[0023] Figure 4 for Figure 2 A schematic diagram of the decomposed structure;

[0024] Figure 5 This is an exploded structural diagram of an injection mold according to this embodiment;

[0025] Figure 6 This is a schematic diagram of the structure of an injection mold with the front mold removed, according to this embodiment.

[0026] Figure 7 for Figure 6 A schematic diagram of the structure after removing the protective sleeve and copper terminals;

[0027] Figure 8 for Figure 7 Enlarged view of point A in the middle;

[0028] Figure 9 This is a schematic diagram of the structure of the front mold in an injection mold according to this embodiment.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1-Protective sleeve, 11-Insertion hole, 12-Positioning groove, 13-Sloping surface;

[0031] 2-Insert injection molded part, 21-Copper terminal, 211-Elongated part, 212-Flat part;

[0032] 3-Positioning insert;

[0033] 4-Shovel base, 41-Inclined surface;

[0034] 5-Front mold, 51-Third cavity, 52-Fourth cavity;

[0035] 6-Rear mold, 61-First cavity, 62-Second cavity, 63-Rear insert, 631-First support groove, 64-Injection runner. Detailed Implementation

[0036] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0040] Example 1

[0041] like Figure 1 and Figure 5The image shows an injection molding positioning and protection structure provided in this embodiment, which is applied to an injection mold with an injection cavity. The injection cavity is connected to a protective cavity. The positioning and protection structure includes a protective sleeve 1, which is detachably fitted into the protective cavity. An insertion hole 11 is formed through the protective sleeve 1 along its length direction. The insertion hole 11 is used for the detachable insertion of the elongated portion 211 of the copper terminal 21. The injection molding positioning and protection structure of this embodiment has a plug hole 11 inside the protective sleeve 1. During the injection molding process of the insert injection molded part 2, the elongated part 211 of the copper terminal 21 is first inserted into the plug hole 11, and then the flat part 212 of the copper terminal 21 is placed in the injection cavity. At the same time, the protective sleeve 1 is installed in the protective cavity. Then, molten hot plastic is injected into the injection cavity. During this process, the protective sleeve 1 supports each position of the elongated part 211 of the copper terminal 21, which can effectively prevent the elongated part 211 of the copper terminal 21 from deforming, thereby ensuring that the positional tolerance of the copper terminal 21 meets the requirements, and thus ensuring that the quality of the insert injection molded part 2 obtained by injection molding through the injection mold equipped with the injection molding positioning and protection structure of this embodiment meets the requirements. Meanwhile, by detachably embedding the protective sleeve 1 into the protective cavity, after the insert injection molding is completed and the insert injection molding coated part 2 is transferred and transported, the protective sleeve 1 always wraps around the outer periphery of the slender part 211 of the copper terminal 21, which can better protect the electroplating layer of the slender part 211 of the copper terminal 21 from being scratched or damaged during the handling of the insert injection molding coated part 2.

[0042] It should be noted that, as Figure 2 and Figure 4 As shown, because the insert injection-molded part 2 obtained by injection molding through an injection mold equipped with the injection molding positioning and protective structure of this embodiment includes five copper terminals 21, the protective sleeve 1 of this embodiment is provided with insertion holes 11 corresponding to the positions of the five copper terminals 21. In specific applications, the number of insertion holes 11 provided in the protective sleeve 1 is selected according to the actual number of copper terminals 21 included in the insert injection-molded part 2. For example, in other embodiments, the protective sleeve 1 is provided with one, two, three or other numbers of insertion holes 11.

[0043] In some embodiments of the present invention, the insertion hole 11 is clearance-fitted with the elongated portion 211. This arrangement allows the protective sleeve 1 to be removed from the elongated portion 211 for reuse after the insert injection-molded part 2 has been transported to the designated position.

[0044] Specifically, the inner diameter of the insertion hole 11 is 0.01 mm to 0.02 mm larger than the outer diameter of the elongated portion 211, preferably 0.15 mm. This gap allows the elongated portion 211 to have a small adjustment space within the insertion hole 11 under the action of injection pressure, effectively avoiding the defect of "molding flash" and further improving the quality of the insert injection-molded overmolded part 2 obtained by injection molding.

[0045] It is understood that the detachable connection between the insertion hole 11 and the elongated portion 211 is not limited to the above structure. In other embodiments, the protective sleeve 1 is made of an elastic material, and the insertion hole 11 and the elongated portion 211 are interference-fitted. This design prevents the elongated portion 211 from easily detaching from the insertion hole 11 during injection molding or handling of the insert injection-molded overmolded part 2. Furthermore, the elastic material of the protective sleeve 1 effectively prevents scratches and damage to the electroplating layer of the elongated portion 211 during the relative insertion of the elongated portion 211 and the insertion hole 11. Specifically, to extend the service life of the protective sleeve 1, it is made of the same material as the front mold 5 and the rear mold 6, such as mold steel 8425 / 718H.

[0046] like Figures 2 to 4 , Figure 7 As shown, in some embodiments of the present invention, the positioning and protective structure further includes a positioning insert 3, which is used to be installed at the inner bottom of the protective cavity; the protective sleeve 1 is provided with a positioning groove 12 matching the positioning insert 3 at its lower end along the height direction; during injection molding, the positioning insert 3 is embedded in the positioning groove 12. The positioning insert 3 restricts the degree of freedom of the protective sleeve 1 along the length direction of the protective sleeve 1 within the protective cavity, which can effectively prevent the protective sleeve 1 from moving away from the injection molding cavity due to high injection pressure, thereby improving the quality of the insert injection-molded part 2 obtained by injection molding.

[0047] like Figure 3 , Figure 4 and Figure 6 As shown, specifically, the positioning and protective structure further includes a shovel base 4, which is used to install on the front mold 5. The shovel base 4 is located on the side of the protective sleeve 1 facing away from the injection cavity along the length direction of the protective sleeve 1; the dimension of the positioning groove 12 along the length direction of the protective sleeve 1 is larger than the dimension of the positioning insert 3 along the length direction of the protective sleeve 1; when the front mold 5 and the rear mold 6 are brought close together for mold closing and injection molding is performed, the shovel base 4 abuts against the side of the protective sleeve 1 facing the shovel base 4 along the length direction of the protective sleeve 1, and the positioning insert 3 abuts against the wall of the positioning groove 12 facing away from the injection cavity along the length direction of the protective sleeve 1 (e.g., Figure 3As shown in the figure, at this time, the positioning insert 3 and the shovel base 4 cooperate with each other to restrict the degree of freedom of the protective sleeve 1 along the length direction of the protective sleeve 1 in the protective cavity, which can effectively prevent the protective sleeve 1 from moving away from the injection cavity due to the large injection pressure; at the same time, after the injection molding is completed and the front mold 5 and the rear mold 6 are separated from each other, the shovel base 4 is separated from the protective sleeve 1, which makes it easier to drive the protective sleeve 1 to move relative to the positioning insert 3, thus making it easier to remove the injection-molded insert-coated part 2 from the injection cavity and the protective cavity.

[0048] To facilitate injection molding after the front mold 5 and rear mold 6 are brought close together for mold closing, the shovel base 4 can smoothly approach the protective sleeve 1 along its height direction and fully abut against the side wall of the protective sleeve 1; such as Figures 2 to 4 As shown, specifically, the shovel base 4 is inclined upwards along the height direction towards the side of the protective sleeve 1 to form an inclined surface 41, and the side of the protective sleeve 1 towards the shovel base 4 along the length direction of the protective sleeve 1 is set as a slope surface 13, and the slope surface 13 matches the inclined surface 41.

[0049] Example 2

[0050] like Figures 1 to 9 The figure shown is an injection mold provided in this embodiment, including an injection cavity, a protective cavity and a positioning and protective structure. The injection cavity is used for embedding the flat portion 212 of the copper terminal 21. The injection cavity and the protective cavity are connected. The positioning and protective structure adopts the injection molding positioning and protective structure described in Embodiment 1. In this embodiment, the positioning and protective structure of the injection mold has a insertion hole 11 inside the protective sleeve 1. During the injection molding process of the insert injection molded part 2, the elongated part 211 of the copper terminal 21 is first inserted into the insertion hole 11, and then the flat part 212 of the copper terminal 21 is placed in the injection cavity. At the same time, the protective sleeve 1 is installed in the protective cavity. Then, molten hot plastic is injected into the injection cavity. During this process, the protective sleeve 1 supports each position of the elongated part 211 of the copper terminal 21, which can effectively prevent the elongated part 211 of the copper terminal 21 from deforming, thereby ensuring that the positional tolerance of the copper terminal 21 meets the requirements, and thus ensuring that the quality of the insert injection molded part 2 obtained by injection molding through the injection mold of this embodiment meets the requirements. Meanwhile, by detachably embedding the protective sleeve 1 into the protective cavity, after the insert injection molding is completed and the insert injection molding coated part 2 is transferred and transported, the protective sleeve 1 always wraps around the outer periphery of the slender part 211 of the copper terminal 21, which can better protect the electroplating layer of the slender part 211 of the copper terminal 21 from being scratched or damaged during the handling of the insert injection molding coated part 2.

[0051] like Figures 5 to 9As shown, in some embodiments of the present invention, the injection mold further includes a front mold 5 and a rear mold 6. The front mold 5 is located above the rear mold 6 along the height direction, and the rear mold 6 can be arranged close to or away from the front mold 5. The rear mold 6 has a first cavity 61 and a second cavity 62 recessed on its side facing the front mold 5. The first cavity 61 and the second cavity 62 are connected and located on one side of the second cavity 62 along the length direction of the protective sleeve 1. The front mold 5 has a third cavity 51 and a fourth cavity 52 recessed on its side facing the rear mold 6. The third cavity 51 and the fourth cavity 52 are connected and located on one side of the fourth cavity 52 along the length direction of the protective sleeve 1. During injection molding, the first cavity 61 and the third cavity 51 form the injection cavity, and the second cavity 62 and the fourth cavity 52 form the protective cavity. When injection molding the insert-molded overmolded part 2, firstly, the elongated portion 211 of the copper terminal 21 is inserted into the insertion hole 11. Then, while placing the flat portion 212 of the copper terminal 21 into the first cavity 61, the protective sleeve 1 is installed in the second cavity 62. Then, the rear mold 6, the copper terminal 21, and the protective sleeve 1 are moved upward along the height direction towards the front mold 5 until the end faces of the rear mold 6 and the front mold 5 abut against each other, completing the rear mold 6. At this time, the flat portion 212 of the copper terminal 21 is located in the injection cavity, and the outer surface of the protective sleeve 1 abuts against the inner wall of the protective cavity for limitation. Then, it is inserted into the injection cavity. Injecting molten hot plastic completes the injection molding process to obtain the insert injection-molded overmolded part 2. During the injection molding process, because the lower end face of the protective sleeve 1 abuts against the wall of the second cavity 62, and the protective sleeve 1 always wraps around the outer periphery of the slender portion 211 of the copper terminal 21, the protective sleeve 1 can provide sufficient support for each position of the slender portion 211 of the copper terminal 21, effectively preventing deformation of the slender portion 211 of the copper terminal 21, thereby ensuring that the positional tolerance of the copper terminal 21 meets the requirements; it can also protect the electroplated layer of the slender portion 211 of the copper terminal 21 from being scratched or damaged during the injection molding process. After the insert injection-molded overmolded part 2 is obtained, the rear mold 6, the insert injection-molded overmolded part 2, and the protective sleeve 1 are moved downward along the height direction away from the front mold 5 until the rear mold 6 and the front mold 5 are completely separated to complete the mold parting, so that the insert injection-molded overmolded part 2 and the protective sleeve 1 can be removed from the rear mold 6 for transfer. It should be noted that in this embodiment, the length direction of the protective sleeve 1 is parallel to the length direction of the rear mold 6, and the height direction of this embodiment is parallel to the height direction of the rear mold 6.

[0052] like Figure 7 and Figure 8As shown, in some embodiments of the present invention, a rear insert 63 is provided in the first cavity 61. The rear insert 63 is arranged along the height direction, and a first support groove 631 is provided on the end face of the rear insert 63 facing the front mold 5. During injection molding, the first support groove 631 is used to support and limit the flat portion 212 of the copper terminal 21. During the injection molding process, a portion of the flat portion 212 of the copper terminal 21 is embedded in the first support groove 631. The first support groove 631 can provide an upward support force for the flat portion 212 of the copper terminal 21 and restrict the degree of freedom of the flat portion 212 of the copper terminal 21 along the width direction of the rear mold 6, ensuring that the flat portion 212 of the copper terminal 21 is not easily deformed under the action of injection pressure, thereby ensuring that the positional tolerance of the copper terminal 21 meets the requirements, and further ensuring that the quality of the insert injection-molded part 2 obtained by injection molding through the injection mold of this embodiment meets the requirements.

[0053] In specific applications, the number of the back inserts 63 can be reasonably selected according to the length of the flat portion 212 of the copper terminal 21. For example, in other embodiments, the number of the back inserts 63 is one, two, three, etc. When the number of the back inserts 63 is two or more, the multiple back inserts 63 are arranged at intervals along the length direction of the protective sleeve 1 in the first cavity 61.

[0054] like Figures 5 to 8 As shown, in some embodiments of the present invention, the rear mold 6 is provided with an injection runner 64 on its end face facing the front mold 5. The injection runner 64 is arranged parallel to the width direction of the rear mold 6. One end of the injection runner 64 is connected to the injection cavity, and the other end is used to connect to the main runner. By connecting the injection cavity and the main runner through the injection runner 64 arranged parallel to the width direction of the rear mold 6, the molten hot plastic injected from the nozzle of the injection molding machine into the main runner is directly poured into the injection cavity through the injection runner. This shortens the flow path of the molten hot plastic and reduces the turning points through which the molten hot plastic flows, thereby reducing the pressure loss in the injection runner and improving the quality of the insert injection-molded overmolded part 2 obtained by injection molding.

[0055] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A positioning and protective structure for injection molding, applied to an injection mold with an injection cavity, wherein the injection cavity is connected to a protective cavity, characterized in that, The positioning protection structure includes a protective sleeve (1), which is detachably fitted into the protective cavity; a plug hole (11) is formed through the protective sleeve (1) along the length direction of the protective sleeve (1), and the plug hole (11) is used for the slender part (211) of the copper terminal (21) to be detachably inserted; The protective sleeve (1) is made of elastic material, and the insertion hole (11) is press-fitted with the elongated part (211); After the insert injection molding is obtained and the insert injection molding coating part (2) is transferred and transported, the protective sleeve (1) is wrapped around the outer periphery of the slender part (211) of the copper terminal (21); It also includes a positioning insert (3), which is used to install in the inner bottom of the protective cavity; the protective sleeve (1) is provided with a positioning groove (12) matching the positioning insert (3) at the lower end along the height direction; during injection molding, the positioning insert (3) is embedded in the positioning groove (12); It also includes a shovel base (4), which is used to be installed on the front mold (5). The shovel base (4) is located on the side of the protective sleeve (1) away from the injection cavity along the length direction of the protective sleeve (1). The size of the positioning groove (12) along the length direction of the protective sleeve (1) is larger than the size of the positioning insert (3) along the length direction of the protective sleeve (1). During injection molding, the shovel base (4) abuts against the side of the protective sleeve (1) facing the shovel base (4) along the length direction of the protective sleeve (1), and the positioning insert (3) abuts against the wall of the positioning groove (12) away from the injection cavity along the length direction of the protective sleeve (1).

2. The injection-molded positioning and protective structure according to claim 1, characterized in that, The shovel base (4) is inclined towards the side of the protective sleeve (1) along the length direction of the protective sleeve (1) to form an inclined surface (41). The side of the protective sleeve (1) towards the shovel base (4) along the length direction of the protective sleeve (1) is set as a slope surface (13). The slope surface (13) matches the inclined surface (41).

3. An injection mold, characterized in that, It includes an injection molding cavity, a protective cavity, and a positioning and protective structure. The injection molding cavity is used for embedding the flat portion (212) of the copper terminal (21). The injection molding cavity and the protective cavity are connected. The positioning and protective structure adopts the injection molding positioning and protective structure described in claim 1 or 2.

4. The injection mold according to claim 3, characterized in that, It also includes a front mold (5) and a rear mold (6), the front mold (5) being located above the rear mold (6) along the height direction, and the rear mold (6) being arranged close to or away from the front mold (5); the rear mold (6) has a first cavity (61) and a second cavity (62) recessed on the side facing the front mold (5), the first cavity (61) and the second cavity (62) being connected, and the first cavity (61) being located on one side of the second cavity (62) along the length direction of the protective sleeve (1); The front mold (5) has a third cavity (51) and a fourth cavity (52) recessed on the side facing the rear mold (6). The third cavity (51) and the fourth cavity (52) are connected, and the third cavity (51) is located on one side of the fourth cavity (52) along the length direction of the protective sleeve (1). When the mold is closed for injection molding, the first cavity (61) and the third cavity (51) form the injection cavity, and the second cavity (62) and the fourth cavity (52) form the protective cavity.

5. The injection mold according to claim 4, characterized in that, The first cavity (61) is provided with a rear insert (63), which is arranged along the height direction. The end face of the rear insert (63) facing the front mold (5) is provided with a first support groove (631). During injection molding, the first support groove (631) is used to support the flat part (212) of the limiting copper terminal (21).

6. The injection mold according to claim 4, characterized in that, The rear mold (6) is provided with an injection runner (64) on the end face facing the front mold (5). One end of the injection runner (64) is connected to the injection cavity, and the other end is used to connect to the main runner.

Images