Mold for injection molding inductors

Abstract

This invention relates to a mold for injection molding inductors, comprising a power assembly, an upper mold assembly, and a lower mold assembly. The upper mold assembly includes an upper mold base plate, an upper mold pressure plate, and an upper mold plate. The upper mold base plate is movably mounted on a machine base. The upper mold plate has an upper mold cavity. The upper mold pressure plate has multiple upper ejector pins that can extend into or retract from the upper mold cavity. The lower mold assembly includes a lower mold base plate, a lower mold pressure plate, and a lower mold plate. The lower mold base plate is movably mounted on a machine base. The lower mold plate has a lower mold cavity. The lower mold pressure plate has multiple lower ejector pins that can extend into or retract from the lower mold cavity. The power assembly is disposed on the upper mold assembly and / or the lower mold assembly, and is used to provide a driving force to drive the upper mold pressure plate and the lower mold pressure plate to move towards or away from each other. The injection molding mold for inductors provided by this invention allows adjustment of the length of the upper ejector pins extending into the upper mold cavity and the length of the lower ejector pins extending into the lower mold cavity, enabling clamping of coils of different specifications.

Description

Technical Field

[0001] This invention relates to the field of inductor molding die technology, and in particular to a die for injection molding inductors. Background Technology

[0002] Inductors, as components that can convert electrical energy into magnetic energy and store it, are widely used in consumer electronics, communications, automotive, aerospace and other fields. Molded inductors, in particular, are increasingly favored in the electronics industry due to their small size, high current capacity, and high manufacturing efficiency.

[0003] Currently, molded inductors are mainly formed by cold pressing metal powder and coils sequentially using a mold, or by a combination of cold pressing and hot pressing. Specifically, the wound coil is placed in the mold cavity of the mold, and fluid metal powder is injected into the cavity. Pressure is then applied to the surface of the metal powder to form the inductor. However, during the molding process, because the coil is freely placed within the mold cavity, the impact of the injected fluid metal powder can easily cause the coil to shift position. This results in the coil not being centered in the molded inductor, severely affecting its inductance performance. Summary of the Invention

[0004] Therefore, it is necessary to provide a mold for injection molding inductors to address the problem that the coil is prone to positional displacement during the injection of fluid metal powder into the mold cavity in existing integral inductor molds.

[0005] A mold for injection molding an inductor is mounted on a machine base. The mold is used for molding an inductor, which includes a coil and metal powder covering the coil. The mold includes a power assembly and an upper mold assembly and a lower mold assembly disposed opposite to each other.

[0006] The upper mold assembly includes an upper mold base plate and an upper mold pressure plate and an upper template sequentially disposed on the upper mold base plate. The upper mold base plate is movably disposed on the machine base. An upper mold cavity is opened on the upper template. The upper mold pressure plate has multiple upper ejector pins that can extend into or retract from the upper mold cavity.

[0007] The lower mold assembly includes a lower mold base plate and a lower mold pressure plate and a lower template sequentially disposed on the lower mold base plate. The lower mold base plate is movably disposed on the machine base. The lower template has a lower mold cavity corresponding to the upper mold cavity. The lower mold pressure plate has multiple lower ejector pins that can extend into or retract from the lower mold cavity.

[0008] The power assembly is disposed on the upper mold assembly and / or the lower mold assembly, and is used to provide a driving force for the upper mold plate and the lower mold plate to move toward each other or away from each other.

[0009] The aforementioned injection molding mold for inductors places the wound coil in the lower mold cavity. The upper and lower mold base plates move towards each other on the machine platform, closing the upper and lower mold cavities. Fluid metal powder is then injected into both cavities, and under pressure, the metal powder is molded to cover the coil, thus achieving the injection molding of the inductor. Since multiple upper ejector pins can extend into the upper mold cavity and multiple lower ejector pins can extend into the lower mold cavity, after the upper and lower mold cavities close, the upper ejector pins can abut against one side of the coil, and the lower ejector pins can abut against the other side of the coil. This clamping action prevents the coil from shifting position due to the impact of the injected fluid metal powder during the injection molding process, ensuring the coil remains centered in the molded inductor and improving its inductance performance. Furthermore, the power unit can drive the upper and lower mold plates to move toward each other or away from each other, and can adjust the length of the upper ejector pin extending into the upper mold cavity and the length of the lower ejector pin extending into the lower mold cavity, which can clamp coils of different specifications and improve the applicability of injection molds for inductors.

[0010] In one embodiment, the upper mold plate is spaced apart from the upper mold base plate, and the lower mold plate is spaced apart from the lower mold base plate. The power assembly includes a plurality of elastic elements and a first driving element. At least one of the elastic elements is disposed between the upper mold plate and the upper mold base plate, and at least one of the elastic elements is disposed between the lower mold plate and the lower mold base plate. The first driving element is disposed on the upper mold plate or the lower mold plate and is used to provide a driving force for driving the upper mold plate and the lower mold plate to move in a direction away from each other.

[0011] In one embodiment, a plurality of elastic elements are uniformly disposed between the upper mold plate and the upper mold base plate, and a plurality of elastic elements are uniformly disposed between the lower mold plate and the lower mold base plate, wherein the deformation direction of the elastic elements is consistent with the movement direction of the upper mold plate and the lower mold plate.

[0012] In one embodiment, one end of each of the plurality of elastic members disposed between the upper mold plate and the upper mold base plate is connected to the upper mold plate, and the other end of each of the elastic members is connected to the upper mold base plate. Similarly, one end of each of the plurality of elastic members disposed between the lower mold plate and the lower mold base plate is connected to the lower mold plate, and the other end of each of the elastic members is connected to the lower mold base plate.

[0013] In one embodiment, the elastic element is a return spring.

[0014] In one embodiment, the upper mold plate is spaced apart from the upper mold base plate, and the lower mold plate is spaced apart from the lower mold base plate. The power assembly includes a plurality of second driving members, at least one of which is disposed between the upper mold base plate and the upper mold plate, for providing a driving force to drive the upper mold plate to move toward or away from the lower mold plate. At least one of the second driving members is disposed between the lower mold base plate and the lower mold plate, for providing a driving force to drive the lower mold plate to move toward or away from the upper mold plate.

[0015] In one embodiment, at least one of the second driving members is fixed to the upper mold base plate and its output end is connected to the upper mold plate, and at least one of the second driving members is fixed to the lower mold base plate and its output end is connected to the lower mold plate.

[0016] In one embodiment, the second driving element is either a hydraulic cylinder or a drive motor.

[0017] In one embodiment, the upper mold assembly further includes an upper mold ejector plate, which is fixed to the upper mold pressure plate and has a gap with the upper mold plate. The upper mold ejector plate has a plurality of first through holes, and a plurality of upper ejector pins can be inserted into the plurality of first through holes, and their ends are connected to the upper mold pressure plate.

[0018] The lower mold assembly also includes a lower mold ejector plate, which is fixed to the lower mold pressure plate and has a gap with the lower mold plate. The lower mold ejector plate has multiple second through holes, and multiple lower ejector pins can be inserted into the multiple second through holes, with their ends connected to the lower mold pressure plate.

[0019] In one embodiment, the upper template and / or the lower template are provided with powder injection ports, through which metal powder can be injected into the upper mold cavity and the lower mold cavity. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the mold for injection molding inductors provided by the present invention in the mold-closed state.

[0021] Figure 2 This is a schematic diagram of the mold for injection molding inductors provided by the present invention in the mold-open state.

[0022] Figure 3 for Figure 2 A magnified view of a portion of region A in the middle;

[0023] Figure 4 for Figure 2 A magnified view of a portion of region B in the middle;

[0024] Figure 5 This is a schematic diagram of the structure of a mold for injection molding an inductor provided in one embodiment.

[0025] Figure label:

[0026] 100. Molds for injection molding inductors;

[0027] 110. Upper mold assembly; 111. Upper mold base plate; 112. Upper mold pressure plate; 113. Upper template; 114. Upper mold cavity; 115. Upper ejector pin; 116. Upper mold ejector plate; 117. First through hole;

[0028] 120. Lower mold assembly; 121. Lower mold base plate; 122. Lower mold pressure plate; 123. Lower mold template; 124. Lower mold cavity; 125. Lower ejector pin; 126. Lower mold ejector plate; 127. Second through hole;

[0029] 130. Power assembly; 131. Elastic element; 132. First drive element; 134. Second drive element. Detailed Implementation

[0030] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" 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 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.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0036] The technical solutions provided by the embodiments of the present invention are described below with reference to the accompanying drawings.

[0037] like Figures 1-4 As shown, the present invention provides a mold 100 for injection molding inductors. The mold 100 is mounted on a machine base and used for injection molding inductors. The inductor is made of a coil and metal powder covering the coil. The mold 100 includes an upper mold assembly 110, a lower mold assembly 120, and a power assembly 130, with the upper mold assembly 110 and the lower mold assembly 120 arranged opposite to each other.

[0038] The upper mold assembly 110 includes an upper mold base plate 111 and an upper mold pressure plate 112 and an upper mold template 113 sequentially disposed on the upper mold base plate 111. The upper mold base plate 111 is movably disposed on the machine base, that is, the upper mold pressure plate 112 is disposed between the upper mold base plate 111 and the upper mold template 113. The machine base is provided with a drive mechanism that can drive the upper mold base plate 111 to move. An upper mold cavity 114 is opened on the upper mold template 113. The upper mold pressure plate 112 has multiple upper ejector pins 115, and the multiple upper ejector pins 115 can extend into or retract from the upper mold cavity 114. When the multiple upper ejector pins 115 extend into the upper mold cavity 114, the multiple upper ejector pins 115 can clamp the coil.

[0039] The lower mold assembly 120 includes a lower mold base plate 121 and a lower mold pressure plate 122 and a lower mold template 123 sequentially disposed on the lower mold base plate 121. The lower mold base plate 121 is movably disposed on the machine base, that is, the lower mold pressure plate 122 is disposed between the lower mold base plate 121 and the lower mold template 123, and the lower mold template 123 is located on the side closer to the upper mold template 113. The machine base is provided with a drive mechanism that can drive the lower mold base plate 121 to move. The lower mold template 123 has a lower mold cavity 124, which corresponds to the upper mold cavity 114. The lower mold pressure plate 122 has multiple lower ejector pins 125, and the multiple lower ejector pins 125 can extend into or retract from the lower mold cavity 124. When the multiple lower ejector pins 125 extend into the lower mold cavity 124, the multiple lower ejector pins 125 cooperate with the multiple upper ejector pins 115 to clamp the coil.

[0040] The power assembly 130 is disposed on the upper mold assembly 110 and / or the lower mold assembly 120, and is used to provide a driving force to drive the upper mold plate 112 and the lower mold plate 122 to move toward each other or away from each other, so that the upper mold plate 112 and the lower mold plate 122 move toward each other or away from each other. Specifically, when the power assembly 130 drives the upper mold plate 112 and the lower mold plate 122 to move toward each other, the length of the multiple upper ejector pins 115 extending into the upper mold cavity 114 is relatively long, and the length of the multiple lower ejector pins 125 extending into the lower mold cavity 124 is also relatively long, so as to clamp the coil with a small height after winding. When the power assembly 130 drives the upper mold plate 112 and the lower mold plate 122 to move away from each other, the lengths of the multiple upper ejector pins 115 extending into the upper mold cavity 114 and the lengths of the multiple lower ejector pins 125 extending into the lower mold cavity 124 are relatively short, which can clamp the coil with a relatively high height after winding. After the metal powder covering the outside of the coil is initially formed under a certain pressure, the multiple upper ejector pins 115 and the multiple lower ejector pins 125 can be withdrawn from the upper mold cavity 114 and the lower mold cavity 124 respectively. Due to the withdrawal of the upper ejector pins 115 and the lower ejector pins 125, gaps will be left in the metal powder covering the outside of the coil. Fluid metal powder will continue to be injected into the upper mold cavity 114 and the lower mold cavity 124, and the gaps will be filled under a certain pressure to complete the injection molding of the inductor.

[0041] The aforementioned injection molding mold 100 for inductors places the wound coil into the lower mold cavity 124. The upper mold base plate 111 and the lower mold base plate 121 move towards each other on the machine platform, and the upper mold cavity 114 and the lower mold cavity 124 close together. Figure 1 As shown, fluid metal powder is injected into the upper mold cavity 114 and the lower mold cavity 124. Under a certain pressure, the metal powder is molded and covers the outside of the coil to achieve the injection molding of the inductor. After the injection molding of the inductor is completed, the upper mold base plate 111 and the lower mold base plate 121 move away from each other on the machine, and the upper mold cavity 114 and the lower mold cavity 124 open. Figure 2As shown, the power assembly 130 drives multiple lower ejector pins 125 to extend into the lower mold cavity 124, ejecting the molded inductor and completing the demolding of the inductor. Since multiple upper ejector pins 115 can extend into the upper mold cavity 114 and multiple lower ejector pins 125 can extend into the lower mold cavity 124, after the upper mold cavity 114 and lower mold cavity 124 are closed, the multiple upper ejector pins 115 can abut against one side of the coil, and the multiple lower ejector pins 125 can abut against the other side of the coil. This clamping action prevents the coil from shifting position during the inductor injection molding process due to the impact of the injected fluid metal powder, ensuring that the coil is centered in the molded inductor and improving the inductor's inductance performance. Furthermore, the power assembly 130 can drive the upper mold plate 112 and the lower mold plate 122 to move toward each other or away from each other, and can adjust the length of the upper ejector pin 115 extending into the upper mold cavity 114 and the length of the lower ejector pin 125 extending into the lower mold cavity 124, so as to clamp coils of different specifications and improve the applicability of the injection molding inductor mold 100.

[0042] To adjust the length of the upper ejector pin 115 extending into the upper mold cavity 114 and the length of the lower ejector pin 125 extending into the lower mold cavity 124, a preferred embodiment is as follows: Figures 1-4As shown, upper mold plates 112 are spaced apart on upper mold base plate 111, and lower mold plates 122 are spaced apart on lower mold base plate 121. When the power assembly 130 drives the upper mold plates 112 and lower mold plates 122 to move toward each other or away from each other, it provides clearance space for the upper mold plates 112 and lower mold plates 122, and provides installation space for the power assembly 130. The power assembly 130 includes multiple elastic elements 131 and a first driving element 132. At least one elastic element 131 is disposed between the upper mold plate 112 and the upper mold base plate 111, and at least one elastic element 131 is disposed between the lower mold plate 122 and the lower mold base plate 121. In this embodiment, the multiple elastic elements 131 are all in a freely stretched state under normal conditions. The first driving member 132 is disposed on the upper mold plate 112 or the lower mold plate 122, and is used to provide a driving force to drive the upper mold plate 112 and the lower mold plate 122 to move in a direction away from each other, thereby driving the upper mold plate 112 and the lower mold plate 122 to move in a direction away from each other. Specifically, when the first driving member 132 outputs power, it can drive the upper mold plate 112 and the lower mold plate 122 to move in a direction away from each other, and the multiple elastic members 131 are compressed. The upper mold plate 112 drives multiple upper ejector pins 115 to extend into the upper mold cavity 114 for a shorter length, and the lower mold plate 122 drives multiple lower ejector pins 125 to extend into the lower mold cavity 124 for a shorter length, so as to clamp the coil with a higher height after winding; or, the upper mold plate 112 drives multiple upper ejector pins 115 to exit the upper mold cavity 114, and the lower mold plate 122 drives multiple lower ejector pins 125 to exit the lower mold cavity 124, thus completing the injection molding of the inductor. When the power of the first driving member 132 is removed, multiple elastic members 131 perform a stretching and resetting motion, causing the upper mold plate 112 and the lower mold plate 122 to move closer to each other. The upper mold plate 112 drives multiple upper ejector pins 115 to extend a longer length into the upper mold cavity 114, and the lower mold plate 122 drives multiple lower ejector pins 125 to extend a longer length into the lower mold cavity 124, thus clamping the coil with a smaller height after winding. Through the cooperation of multiple elastic members 131 and the first driving member 132, the upper mold plate 112 and the lower mold plate 122 can be driven to move closer to or further away from each other, thereby adjusting the lengths of the upper ejector pins 115 and lower ejector pins 125 extending into the upper mold cavity 114 and the lower ejector pins 125 extending into the lower mold cavity 124. This allows for clamping coils of different specifications, improving the applicability of the injection molding mold 100 for inductors.

[0043] To prevent the upper ejector pin 115 and the lower ejector pin 125 from tilting during extension and retraction, thus failing to clamp the coil, specifically, as follows: Figures 1-4As shown, multiple elastic elements 131 are evenly arranged between the upper mold plate 112 and the upper mold base plate 111, and multiple elastic elements 131 are evenly arranged between the lower mold plate 122 and the lower mold base plate 121. The deformation direction of the elastic elements 131 is consistent with the movement direction of the upper mold plate 112 and the lower mold plate 122. With this arrangement, when the upper mold plate 112 and the lower mold plate 122 move towards or away from each other, the multiple elastic elements 131 can simultaneously apply elastic force to the upper mold plate 112 due to their elastic force. This ensures the stability of the upper mold plate 112 during movement and prevents the upper mold plate 112 from wobbling during movement if only one elastic element 131 provides elastic force. This also avoids the upper ejector pin 115 tilting during extension and retraction, which could lead to the inability to clamp the coil. Similarly, multiple elastic elements 131 can also simultaneously apply elastic force to the lower mold plate 122 to ensure the stability of the lower mold plate 122 during movement, and prevent the lower mold plate 122 from shaking during movement if only one elastic element 131 provides elastic force to it. This also avoids the lower ejector pin 125 tilting during extension and retraction, which could result in the inability to clamp the coil.

[0044] Furthermore, such as Figures 1-4 As shown, one end of each of the multiple elastic elements 131 disposed between the upper mold plate 112 and the upper mold base plate 111 is connected to the upper mold plate 112 by welding, plugging or other means, and the other end of each of the multiple elastic elements 131 disposed between the upper mold plate 112 and the upper mold base plate 111 is connected to the upper mold base plate 111 by welding, plugging or other means, so as to realize the fixed connection between the multiple elastic elements 131 and the upper mold base plate 111, and can abut against the upper mold plate 112. Through the reciprocating movement of the multiple elastic elements 131, the upper mold plate 112 can move towards or away from the lower mold plate 122, so as to adjust the length of the multiple upper ejector pins 115 extending into the upper mold cavity 114. Similarly, one end of each of the multiple elastic elements 131 disposed between the lower mold plate 122 and the lower mold base plate 121 is connected to the lower mold plate 122 by welding, plugging or other means, and the other end of each of the multiple elastic elements 131 disposed between the lower mold plate 122 and the lower mold base plate 121 is connected to the lower mold base plate 121 by welding, plugging or other means, so as to realize the fixed connection between the multiple elastic elements 131 and the lower mold plate 122 and the lower mold base plate 121, and can abut against the lower mold plate 122. Through the reciprocating movement of the multiple elastic elements 131, the lower mold plate 122 can move towards or away from the upper mold plate 112, so as to adjust the length of the multiple lower ejector pins 125 extending into the lower mold cavity 124.

[0045] The elastic element 131 is a reset elastic element. When the first driving member 132 outputs power, the elastic element 131 is subjected to pressure and can undergo elastic deformation to ensure that the upper mold plate 112 and the lower mold plate 122 can move in a direction away from each other, so that the upper ejector pin 115 extends into the upper mold cavity 114 for a shorter length or exits from the upper mold cavity 114, and the lower ejector pin 125 extends into the lower mold cavity 124 for a shorter length or exits from the lower mold cavity 124. When the power of the first driving member 132 is removed, the elastic element 131 can elastically reset to ensure that the upper mold plate 112 and the lower mold plate 122 can move in a direction closer to each other, so that the upper ejector pin 115 extends into the upper mold cavity 114 for a longer length, and the lower ejector pin 125 extends into the lower mold cavity 124 for a longer length.

[0046] Of course, the type of elastic element 131 is not limited to the reset spring provided above, and can also be an elastic sheet, a flexible sheet, or other elements capable of elastic deformation. The present invention does not limit the specific type of elastic element 131. Furthermore, the first driving element 132 can be a driving cylinder, a driving motor, or other elements capable of outputting power; the present invention does not limit the specific type of the first driving element 132.

[0047] In one embodiment, such as Figures 3-5As shown, upper mold plates 112 are spaced apart on upper mold base plate 111, and lower mold plates 122 are spaced apart on lower mold base plate 121. When the power assembly 130 drives the upper mold plates 112 and lower mold plates 122 to move toward or away from each other, it provides clearance space for the upper mold plates 112 and lower mold plates 122, and provides installation space for the power assembly 130. The power assembly 130 includes a plurality of second drive members 134, at least one of which is disposed between the upper mold base plate 111 and the upper mold plates 112. The second drive member 134 disposed between the upper mold base plate 111 and the upper mold plates 112 is used to provide a driving force to drive the upper mold plates 112 to move toward or away from the lower mold plates 122, so that the upper mold plates 112 move toward or away from the lower mold plates 122. At least one second driving member 134 is disposed between the lower mold base plate 121 and the lower mold pressure plate 122. The second driving member 134 disposed between the lower mold base plate 121 and the lower mold pressure plate 122 is used to provide a driving force to drive the lower mold pressure plate 122 to move toward or away from the upper mold pressure plate 112, so that the lower mold pressure plate 122 moves toward or away from the upper mold pressure plate 112. Specifically, when the second driving member 134 outputs power to drive the upper mold plate 112 and the lower mold plate 122 to move in a direction away from each other, the upper mold plate 112 drives multiple upper ejector pins 115 to extend into the upper mold cavity 114 for a shorter length, and the lower mold plate 122 drives multiple lower ejector pins 125 to extend into the lower mold cavity 124 for a shorter length, so as to clamp the coil with a relatively high height after winding; or, the upper mold plate 112 drives multiple upper ejector pins 115 to exit the upper mold cavity 114, and the lower mold plate 122 drives multiple lower ejector pins 125 to exit the lower mold cavity 124, thus completing the injection molding of the inductor. When the second driving member 134 outputs power to drive the upper mold plate 112 and the lower mold plate 122 to move towards each other, the upper mold plate 112 drives multiple upper ejector pins 115 to extend into the upper mold cavity 114 for a longer length, and the lower mold plate 122 drives multiple lower ejector pins 125 to extend into the lower mold cavity 124 for a longer length, so as to clamp the coil with a small height after winding. By using multiple second driving members 134, the upper mold plate 112 and the lower mold plate 122 can be driven to move towards each other or away from each other, thereby adjusting the length of the upper ejector pins 115 extending into the upper mold cavity 114 and the length of the lower ejector pins 125 extending into the lower mold cavity 124, which can clamp coils of different specifications and improve the applicability of the injection molding mold 100 for inductors.

[0048] Furthermore, such as Figures 3-5As shown, at least one second driving member 134 is fixed to the upper mold base plate 111 by means of screwing, welding, etc., and the output end of the second driving member 134 is connected to the upper mold pressure plate 112, so that at least one second driving member 134 is provided between the upper mold base plate 111 and the upper mold pressure plate 112, and the second driving member 134 can output power to drive the upper mold pressure plate 112 to move toward or away from the lower mold pressure plate 122. Similarly, at least one second driving member 134 is fixed to the lower mold base plate 121 by means of screwing, welding, etc., and the output end of the second driving member 134 is connected to the lower mold pressure plate 122, so that at least one second driving member 134 is provided between the lower mold base plate 121 and the lower mold pressure plate 122, and the second driving member 134 can output power to drive the lower mold pressure plate 122 to move toward or away from the upper mold pressure plate 112.

[0049] The second driving component 134 is either a hydraulic cylinder or a motor. For the upper mold plate 112 and lower mold plate 122, which are relatively large in volume and mass, the second driving component 134 is preferably a hydraulic cylinder, capable of outputting a large force to drive the upper mold plate 112 and lower mold plate 122 to move towards or away from each other. When high motion accuracy is required for the upper mold plate 112 and lower mold plate 122, the second driving component 134 is preferably a motor, capable of precisely adjusting the movement distance between the upper mold plate 112 and lower mold plate 122. Of course, the second driving component 134 is not limited to the hydraulic cylinder or motor described above; it can also be a pneumatic cylinder or other components capable of outputting power. The present invention does not limit the specific type of the second driving component 134.

[0050] To assemble and fix the upper ejector pin 115 and the lower ejector pin 125, a preferred embodiment is as follows: Figures 1-4 As shown, the upper mold assembly 110 also includes an upper mold ejector plate 116. The upper mold ejector plate 116 is fixed to the upper mold pressure plate 112 by means of screwing, welding, etc., and there is a gap between the upper mold ejector plate 116 and the upper mold plate 113. When the upper mold ejector plate 116 moves with the upper mold pressure plate 112, the gap between the upper mold ejector plate 116 and the upper mold plate 113 can be used as a buffer space, so that multiple upper ejector pins 115 can extend and retract within the upper mold cavity 114, thereby adjusting the length of the multiple upper ejector pins 115 extending into the upper mold cavity 114. The upper mold ejector plate 116 has multiple first through holes 117, and the multiple upper ejector pins 115 are correspondingly inserted into the multiple first through holes 117, and the multiple upper ejector pins 115 are connected to the upper mold pressure plate 112. In this embodiment, multiple upper ejector pins 115 can be inserted into multiple first through holes 117, and the ends of the multiple upper ejector pins 115 can be locked onto the upper mold plate 112 by bolts or the like, so as to achieve the assembly and fixation of the multiple upper ejector pins 115.

[0051] Similarly, the lower mold assembly 120 also includes a lower mold ejector plate 126. The lower mold ejector plate 126 is fixed to the lower mold pressure plate 122 by means of screwing, welding, etc., and there is a gap between the lower mold ejector plate 126 and the lower mold plate 123. When the lower mold ejector plate 126 moves with the lower mold pressure plate 122, the gap between the lower mold ejector plate 126 and the lower mold plate 123 can be used as a buffer space, so that multiple lower ejector pins 125 can extend and retract within the lower mold cavity 124, thereby adjusting the length of the multiple lower ejector pins 125 extending into the lower mold cavity 124. The lower mold ejector plate 126 has multiple second through holes 127, and the multiple lower ejector pins 125 are correspondingly inserted into the multiple second through holes 127 and connected to the lower mold pressure plate 122. In this embodiment, multiple lower ejector pins 125 can be inserted into multiple second through holes 127, and the ends of the multiple lower ejector pins 125 can be locked onto the lower mold plate 122 by bolts or the like, so as to achieve the assembly and fixation of the multiple lower ejector pins 125.

[0052] To complete the injection molding of the inductor, a preferred embodiment is as follows: Figure 1 and Figure 2 As shown, the upper mold 113 and / or the lower mold 123 are provided with powder injection ports. Metal powder can be injected into the upper mold cavity 114 and the lower mold cavity 124 through the powder injection ports, and the injected metal powder will cover the outside of the coil under a certain pressure to complete the injection molding of the inductor.

[0053] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A mold for injection molding an inductor, which is installed on a machine table, for molding an inductor including a coil and a metal powder coated outside the coil, characterized in that, The injection-molded inductor mold comprises a power assembly, and oppositely arranged upper and lower mold assemblies, wherein: The upper mold assembly comprises an upper mold base plate, and an upper mold pressing plate and an upper mold plate arranged in sequence on the upper mold base plate, the upper mold base plate is movably arranged on the machine table, the upper mold plate is provided with an upper mold cavity, the upper mold pressing plate is provided with a plurality of upper ejector pins capable of extending into or out of the upper mold cavity, and when the plurality of upper ejector pins extend into the upper mold cavity, the plurality of upper ejector pins clamp the coil; The lower mold assembly comprises a lower mold base plate, and a lower mold pressing plate and a lower mold plate arranged in sequence on the lower mold base plate, the lower mold base plate is movably arranged on the machine table, the lower mold plate is provided with a lower mold cavity corresponding to the upper mold cavity, the lower mold pressing plate is provided with a plurality of lower ejector pins capable of extending into or out of the lower mold cavity, and when the plurality of lower ejector pins extend into the lower mold cavity, the plurality of lower ejector pins cooperate with the plurality of upper ejector pins to clamp the coil; The power assembly is arranged on the upper mold assembly and / or the lower mold assembly, and is used to provide driving force for driving the upper mold pressing plate and the lower mold pressing plate to move towards each other or away from each other, the power assembly comprises a plurality of elastic members and a first driving member, at least one of the elastic members is arranged between the upper mold pressing plate and the upper mold base plate, at least one of the elastic members is arranged between the lower mold pressing plate and the lower mold base plate, and the first driving member is arranged on the upper mold pressing plate or the lower mold pressing plate and is used to provide driving force for driving the upper mold pressing plate and the lower mold pressing plate to move away from each other.

2. The mold for injection-molding inductors according to claim 1, characterized in that, The upper mold pressing plates are arranged on the upper mold base plate in a spaced manner, and the lower mold pressing plates are arranged on the lower mold base plate in a spaced manner.

3. The mold for injection-molding inductors according to claim 2, characterized in that, A plurality of elastic members are uniformly arranged between the upper mold pressing plate and the upper mold base plate, and a plurality of elastic members are uniformly arranged between the lower mold pressing plate and the lower mold base plate, and the deformation direction of the elastic members is consistent with the movement direction of the upper mold pressing plate and the lower mold pressing plate.

4. The mold for injection-molding inductors according to claim 3, characterized in that, One end of each of the plurality of elastic members arranged between the upper mold pressing plate and the upper mold base plate is connected to the upper mold pressing plate, and the other end is connected to the upper mold base plate, and one end of each of the plurality of elastic members arranged between the lower mold pressing plate and the lower mold base plate is connected to the lower mold pressing plate, and the other end is connected to the lower mold base plate.

5. The mold for injection-molding inductors according to claim 2, characterized in that, The elastic member is a return spring.

6. The mold for injection-molding inductors according to claim 1, characterized in that, The upper mold pressing plates are arranged on the upper mold base plate in a spaced manner, and the lower mold pressing plates are arranged on the lower mold base plate in a spaced manner, the power assembly comprises a plurality of second driving members, at least one of the second driving members is arranged between the upper mold base plate and the upper mold pressing plate and is used to provide driving force for driving the upper mold pressing plate to move towards or away from the lower mold pressing plate, and at least one of the second driving members is arranged between the lower mold base plate and the lower mold pressing plate and is used to provide driving force for driving the lower mold pressing plate to move towards or away from the upper mold pressing plate.

7. The mold for injection-molding inductors according to claim 6, characterized in that, At least one of the second driving members is fixed on the upper die base plate and has an output end connected to the upper die pressing plate, and at least one of the second driving members is fixed on the lower die base plate and has an output end connected to the lower die pressing plate.

8. The mold for injection-molding inductors according to claim 6, wherein The second driving member is one of a driving oil cylinder and a driving motor.

9. The mold for injection-molding inductors according to claim 1, characterized in that, The upper die assembly further comprises an upper die ejector plate fixed on the upper die pressing plate and having a gap with the upper die plate, the upper die ejector plate is provided with a plurality of first through holes, and a plurality of the upper ejector pins are correspondingly inserted into the first through holes and have end portions connected to the upper die pressing plate. The lower die assembly further comprises a lower die ejector plate fixed on the lower die pressing plate and having a gap with the lower die plate, the lower die ejector plate is provided with a plurality of second through holes, and a plurality of the lower ejector pins are correspondingly inserted into the second through holes and have end portions connected to the lower die pressing plate.

10. The mold for injection-molding inductors according to claim 1, characterized in that, The upper die plate and / or the lower die plate is provided with a powder injection port through which metal powder can be injected into the upper die cavity and the lower die cavity.

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