CN115870500A - Injection molding mold for inductor - Google Patents

Abstract

The invention relates to a mold for injection molding of an inductor, which comprises a power assembly, an upper mold assembly and a lower mold assembly, wherein: the upper die assembly comprises an upper die base plate, an upper die pressing plate and an upper die plate, the upper die base plate is movably arranged on the machine table, an upper die cavity is formed in the upper die plate, and a plurality of upper ejector pins capable of extending into or withdrawing from the upper die cavity are arranged on the upper die pressing plate; the lower die assembly comprises a lower die bottom plate, a lower die pressing plate and a lower die plate, the lower die bottom plate is movably arranged on the machine table, a lower die cavity is formed in the lower die plate, and a plurality of lower ejector pins capable of extending into or withdrawing from the lower die cavity are arranged on the lower die pressing plate; the power assembly is arranged on the upper die assembly and/or the lower die assembly and used for providing driving force for driving the upper die pressing plate and the lower die pressing plate to move towards the direction close to or away from each other. The mold for injection molding the inductor can adjust the length of the upper thimble extending into the upper mold cavity and the length of the lower thimble extending into the lower mold cavity, and can clamp coils with different specifications.

Description

Injection molding mold for inductor

Technical Field

The invention relates to the technical field of inductor forming molds, in particular to a mold for injection molding of an inductor.

Background

An inductor is used as an element capable of converting electric energy into magnetic energy and storing the magnetic energy, and is widely applied to the fields of consumer electronics, communication, automobiles, aerospace and the like. The integrally formed inductor has the characteristics of small volume, large current, high production efficiency and the like, and is more and more favored in the field of electronic devices.

At present, an integrally formed inductor is mainly formed by sequentially forming metal powder and a coil through cold pressing or forming the metal powder and the coil through twice pressing in a combined mode of one-time cold pressing and twice hot pressing. The method specifically comprises the following steps: and placing the wound coil in a mold cavity of an integrally molded inductance mold, injecting fluid metal powder into the mold cavity, and applying pressure on the surface of the metal powder to mold the inductor. However, in the above inductor, because the coil is freely placed in the mold cavity during the molding process, in the process of injecting the fluid metal powder, the coil is prone to position shift due to the impact of the metal powder, so that the coil is not located in the center of the molded inductor, and the inductance performance of the inductor is seriously affected.

Disclosure of Invention

In view of the above, it is necessary to provide a mold for injection molding an inductor, which is capable of solving a problem that a coil is likely to be displaced in a process of injecting a fluid metal powder into a mold cavity in a conventional mold for integrally molding an inductor.

The utility model provides a mould for injection moulding inductor installs on the board, mould for injection moulding inductor is used for the shaping of inductor, the inductor include the coil and wrap up in the outer metal powder of coil, mould for injection moulding inductor includes power component and the relative last mould subassembly and the lower mould subassembly that sets up, wherein:

the upper die assembly comprises an upper die base plate, an upper die pressing plate and an upper die plate, wherein the upper die pressing plate and the upper die plate are sequentially arranged on the upper die base plate;

the lower die assembly comprises a lower die bottom plate, a lower die pressing plate and a lower die plate, the lower die pressing plate and the lower die plate are sequentially arranged on the lower die bottom plate, the lower die bottom plate is movably arranged on the machine table, a lower die cavity corresponding to the upper die cavity is formed in the lower die plate, and a plurality of lower ejector pins capable of extending into or withdrawing from the lower die cavity are arranged on the lower die pressing plate;

the power assembly is arranged on the upper die assembly and/or the lower die assembly and is used for providing driving force for driving the upper die pressing plate and the lower die pressing plate to move towards the direction close to or away from each other.

The injection molding inductor mold is characterized in that a coil formed by winding is placed in a lower mold cavity, an upper mold base plate and a lower mold base plate move towards a direction close to each other on a machine table, the upper mold cavity and the lower mold cavity are closed, fluid metal powder is injected into the upper mold cavity and the lower mold cavity, and the metal powder is molded and coated outside the coil under certain pressure so as to realize injection molding of the inductor. The upper ejector pins can be abutted to one side of the coil and the lower ejector pins can be abutted to the other side of the coil after the upper die cavity and the lower die cavity are assembled, so that the coil is clamped, the bad phenomenon that the position of the coil deviates due to the impact of injected fluid metal powder in the injection molding process of the inductor is prevented, the coil in the molded inductor is ensured to be in the central position, and the inductance performance of the inductor is improved. And the power component can drive the upper die pressing plate and the lower die pressing plate to move towards the directions close to or away from each other, the length of the upper thimble extending into the upper die cavity and the length of the lower thimble extending into the lower die cavity can be adjusted, coils with different specifications can be clamped, and the applicability of the die for injection molding of inductors is improved.

In one embodiment, the upper pressing plate is arranged on the upper die base plate at intervals, the lower pressing plate is arranged on the lower die base plate at intervals, the power assembly comprises a plurality of elastic pieces and a first driving piece, at least one elastic piece is arranged between the upper pressing plate and the upper die base plate, at least one elastic piece is arranged between the lower pressing plate and the lower die base plate, and the first driving piece is arranged on the upper pressing plate or the lower pressing plate and used for providing a driving force for driving the upper pressing plate and the lower pressing plate to move towards the direction away from each other.

In one embodiment, a plurality of the elastic pieces are uniformly arranged between the upper die pressing plate and the upper die base plate, a plurality of the elastic pieces are uniformly arranged between the lower die pressing plate and the lower die base plate, and the deformation direction of the elastic pieces is consistent with the movement direction of the upper die pressing plate and the lower die pressing plate.

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

In one embodiment, the elastic member is a return spring.

In one embodiment, the upper pressing plate is arranged on the upper die base plate at intervals, the lower pressing plate is arranged on the lower die base plate at intervals, the power assembly comprises a plurality of second driving pieces, at least one of the second driving pieces is arranged between the upper die base plate and the upper pressing plate and used for providing driving force for driving the upper pressing plate to move towards or away from the lower pressing plate, and at least one of the second driving pieces is arranged between the lower die base plate and the lower pressing plate and used for providing driving force for driving the lower pressing plate to move towards or away from the upper pressing plate.

In one embodiment, at least one of the second driving members is fixed on the upper mold base plate, and the output end thereof is connected to the upper mold platen, and at least one of the second driving members is fixed on the lower mold base plate, and the output end thereof is connected to the lower mold platen.

In one embodiment, the second driving member is one of a driving cylinder and a driving motor.

In one embodiment, the upper die assembly further comprises an upper die ejector plate, the upper die ejector plate is fixed on the upper die pressing plate and has a gap with the upper die plate, the upper die ejector plate is provided with a plurality of first through holes, a plurality of upper ejector pins can be correspondingly inserted into the first through holes, and the end parts of the upper ejector pins are connected to the upper die pressing plate;

the lower die assembly further comprises a lower die ejector plate, the lower die ejector plate is fixed on the lower die pressing plate, a gap is reserved between the lower die ejector plate and the lower die pressing plate, a plurality of second through holes are formed in the lower die ejector plate, the plurality of lower ejector pins can be correspondingly inserted into the plurality of second through holes, and the end portions of the lower ejector pins are connected to the lower die pressing plate.

In one embodiment, the upper mold plate and/or the lower mold plate is provided with a powder injection port, and metal powder can be injected into the upper mold cavity and the lower mold cavity through the powder injection port.

Drawings

Fig. 1 is a schematic structural diagram of a mold for injection molding of an inductor according to the present invention in a mold closing state;

fig. 2 is a schematic structural diagram of a mold for injection molding of an inductor according to the present invention in an open state;

FIG. 3 is an enlarged view of a portion of area A of FIG. 2;

FIG. 4 is a partial enlarged view of the area B in FIG. 2;

fig. 5 is a schematic structural diagram of a mold for injection molding of an inductor according to an embodiment.

Reference numerals:

100. injection molding a mold for the inductor;

110. an upper die assembly; 111. an upper die base plate; 112. an upper die pressing plate; 113. mounting a template; 114. an upper mold cavity; 115. an upper thimble; 116. an upper die ejector plate; 117. a first through hole;

120. a lower die assembly; 121. a lower die base plate; 122. pressing plates of the lower die; 123. a lower template; 124. a lower mold cavity; 125. a lower thimble; 126. a lower die ejector plate; 127. a second through hole;

130. a power assembly; 131. an elastic member; 132. a first driving member; 134. a second driving member.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The technical scheme provided by the embodiment of the invention is described below by combining the accompanying drawings.

As shown in fig. 1 to 4, the present invention provides a mold 100 for injection molding of an inductor, wherein the mold 100 for injection molding of an inductor is mounted on a machine for injection molding of an inductor. The inductor is made of a coil and metal powder coated outside the coil. The mold 100 for injection molding of inductors includes an upper mold assembly 110, a lower mold assembly 120, and a power assembly 130, wherein the upper mold assembly 110 is disposed opposite to the lower mold assembly 120.

The upper mold assembly 110 includes an upper mold base plate 111, and an upper mold platen 112 and an upper mold platen 113 sequentially disposed on the upper mold base plate 111, wherein the upper mold base plate 111 is movably disposed on the machine platform, that is, the upper mold platen 112 is disposed between the upper mold base plate 111 and the upper mold platen 113, and the machine platform is provided with a driving mechanism capable of driving the upper mold base plate 111 to move. The upper mold plate 113 has an upper mold cavity 114, the upper mold platen 112 has a plurality of upper pins 115, and the plurality of upper pins 115 can extend into or withdraw from the upper mold cavity 114, and when the plurality of upper pins 115 extend into the upper mold cavity 114, the plurality of upper pins 115 can clamp the coil.

The lower die assembly 120 includes a lower die base plate 121, and a lower die pressing plate 122 and a lower die plate 123 sequentially disposed on the lower die base plate 121, the lower die base plate 121 is movably disposed on the machine, that is, the lower die pressing plate 122 is disposed between the lower die base plate 121 and the lower die plate 123, and the lower die plate 123 is located at a side close to the upper die plate 113, and the machine is provided with a driving mechanism capable of driving the lower die base plate 121 to move. The lower mold plate 123 has a lower mold cavity 124, the lower mold cavity 124 corresponds to the upper mold cavity 114, the lower mold platen 122 has a plurality of lower needles 125, and the plurality of lower needles 125 can extend into or withdraw from the lower mold cavity 124, and when the plurality of lower needles 125 extend into the lower mold cavity 124, the plurality of lower needles 125 cooperate with the plurality of upper needles 115 to clamp the coil.

The power assembly 130 is disposed on the upper mold assembly 110 and/or the lower mold assembly 120, and is used for providing a driving force for driving the upper mold platen 112 and the lower mold platen 122 to move toward or away from each other, so that the upper mold platen 112 and the lower mold platen 122 can move toward or away from each other. Specifically, when the power assembly 130 drives the upper platen 112 and the lower platen 122 to move toward a direction approaching each other, the length of the upper pins 115 extending into the upper mold cavity 114 is longer, and the length of the lower pins 125 extending into the lower mold cavity 124 is longer, so that a coil with a smaller height after being wound can be clamped. When the power assembly 130 drives the upper mold platen 112 and the lower mold platen 122 to move in the directions away from each other, the length of the upper needles 115 extending into the upper mold cavity 114 is shorter, and the length of the lower needles 125 extending into the lower mold cavity 124 is shorter, so that a coil with a higher height after being wound can be clamped; and after the metal powder coated outside the coil is preliminarily molded under a certain pressure, the upper ejector pins 115 and the lower ejector pins 125 can be respectively withdrawn from the upper mold cavity 114 and the lower mold cavity 124, and as the upper ejector pins 115 and the lower ejector pins 125 are withdrawn, gaps are left in the metal powder coated outside the coil, the fluid metal powder is continuously injected into the upper mold cavity 114 and the lower mold cavity 124, and the gaps are filled under a certain pressure, so that the injection molding of the inductor is completed.

In the injection molding mold 100 for inductors, the coil formed by winding is placed in the lower mold cavity 124, the upper mold base plate 111 and the lower mold base plate 121 move on the machine platform in a direction approaching each other, the upper mold cavity 114 and the lower mold cavity 124 are closed, as shown in fig. 1, fluid metal powder is injected into the upper mold cavity 114 and the lower mold cavity 124, the metal powder is molded and coated outside the coil under a certain pressure, so as to realize 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 on the machine platform in a direction away from each other, the upper mold cavity 114 and the lower mold cavity 124 are opened, as shown in fig. 2, the power assembly 130 drives the plurality of lower ejector pins 125 to extend into the lower mold cavity 124, the molded inductor is ejected, and the demolding of the inductor is completed. Because the upper thimbles 115 can extend into the upper die cavity 114 and the lower thimbles 125 can extend into the lower die cavity 124, after the upper die cavity 114 and the lower die cavity 124 are closed, the upper thimbles 115 can be abutted against one side of the coil, and the lower thimbles 125 can be abutted against the other side of the coil, so that the coil can be clamped, the bad phenomenon that the position of the coil deviates due to the impact of injected fluid metal powder in the injection molding process of the inductor is prevented, the coil in the molded inductor is ensured to be in the central position, and the inductance performance of the inductor is improved. Moreover, the power assembly 130 can drive the upper platen 112 and the lower platen 122 to move toward or away from each other, so as to adjust the length of the upper pins 115 extending into the upper mold cavity 114 and the length of the lower pins 125 extending into the lower mold cavity 124, so as to clamp coils of different specifications, thereby improving the applicability of the mold 100 for injection molding of inductors.

In order to adjust 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, in a preferred embodiment, as shown in fig. 1-4, the upper platen 112 is spaced apart from the upper platen 111, and the lower platen 122 is spaced apart from the lower platen 121, so as to provide a space for the upper platen 112 and the lower platen 122 to move towards or away from each other when the power assembly 130 drives the upper platen 112 and the lower platen 122 to move towards or away from each other, and provide a space for installing the power assembly 130. The power assembly 130 includes a plurality of elastic members 131 and a first driving member 132, at least one elastic member 131 is disposed between the upper mold platen 112 and the upper mold base plate 111, and at least one elastic member 131 is disposed between the lower mold platen 122 and the lower mold base plate 121. In the present embodiment, the plurality of elastic members 131 are each in a freely stretched state in a normal state. The first driving member 132 is disposed on the upper platen 112 or the lower platen 122, and is used for providing a driving force for driving the upper platen 112 and the lower platen 122 to move in a direction away from each other, and driving the upper platen 112 and the lower platen 122 to move in a direction away from each other. Specifically, when the first driving element 132 outputs power, the upper pressing plate 112 and the lower pressing plate 122 are driven to move in a direction away from each other, the elastic elements 131 are compressed, the upper pressing plate 112 drives the upper pins 115 to extend into the upper cavity 114 for a shorter length, and the lower pressing plate 122 drives the lower pins 125 to extend into the lower cavities 124 for a shorter length, so as to clamp the coil with a higher height after being wound and formed; alternatively, the upper mold platen 112 drives the plurality of upper pins 115 to exit the upper mold cavity 114, and the lower mold platen 122 drives the plurality of lower pins 125 to exit the lower mold cavity 124, thereby completing the injection molding of the inductor. When the power of the first driving member 132 is removed, the elastic members 131 are all stretched and reset, so that the upper mold platen 112 and the lower mold platen 122 move toward a direction close to each other, the upper mold platen 112 drives the upper needles 115 to extend into the upper mold cavity 114 for a longer length, and the lower mold platen 122 drives the lower needles 125 to extend into the lower mold cavity 124 for a longer length, so as to clamp the coil with a smaller height after being wound. The matching of the elastic members 131 and the first driving member 132 can drive the upper mold platen 112 and the lower mold platen 122 to move toward a direction close to or away from each other, so as to adjust the length of the upper thimble 115 extending into the upper mold cavity 114 and the length of the lower thimble 125 extending into the lower mold cavity 124, so that coils with different specifications can be clamped, and the applicability of the mold 100 for injection molding of inductors is improved.

In order to prevent the coil from being clamped by the upper pin 115 and the lower pin 125 due to inclination during the extension and retraction process, specifically, as shown in fig. 1 to 4, a plurality of elastic members 131 are uniformly disposed between the upper platen 112 and the upper bottom plate 111, a plurality of elastic members 131 are uniformly disposed between the lower platen 122 and the lower bottom plate 121, and the deformation direction of the elastic members 131 is consistent with the movement direction of the upper platen 112 and the lower platen 122. With such an arrangement, when the upper mold platen 112 and the lower mold platen 122 move towards a direction approaching to or separating from each other, due to the elastic acting forces of the elastic members 131, the elastic members 131 can synchronously apply the elastic acting force to the upper mold platen 112, so as to ensure the stability of the upper mold platen 112 in the moving process, prevent the elastic acting force from being provided to the upper mold platen 112 only by one elastic member 131, easily shake the upper mold platen 112 in the moving process, and further avoid the bad phenomenon that the coil cannot be clamped due to the inclination of the upper thimble 115 in the stretching process. Similarly, the elastic members 131 can also synchronously apply an elastic acting force to the lower mold platen 122, so as to ensure the stability of the lower mold platen 122 in the moving process, prevent the elastic acting force from being provided for the lower mold platen 122 only by one elastic member 131, and easily cause shaking of the lower mold platen 122 in the moving process, thereby avoiding the bad phenomenon that the coil cannot be clamped due to the inclination of the lower thimble 125 in the stretching process.

Further, as shown in fig. 1-4, one end of each of the plurality of elastic members 131 disposed between the upper platen 112 and the upper bottom plate 111 is connected to the upper platen 112 by welding, plugging, and the like, and the other end of each of the plurality of elastic members 131 disposed between the upper platen 112 and the upper bottom plate 111 is connected to the upper bottom plate 111 by welding, plugging, and the like, so as to achieve the fixed connection between the plurality of elastic members 131 and the upper bottom plate 111, and can be abutted against the upper platen 112, and by the telescopic reciprocating motion of the plurality of elastic members 131, the upper platen 112 can move toward the direction close to or away from the lower platen 122, so as to adjust the length of the plurality of upper ejector pins 115 extending into the upper cavity 114. Similarly, one end of each of the plurality of elastic members 131 disposed between the lower mold platen 122 and the lower mold base plate 121 is connected to the lower mold platen 122 by welding, plugging, and the like, and the other end of each of the plurality of elastic members 131 disposed between the lower mold platen 122 and the lower mold base plate 121 is connected to the lower mold base plate 121 by welding, plugging, and the like, so as to achieve the fixed connection of the plurality of elastic members 131 between the lower mold platen 122 and the lower mold base plate 121, and can be abutted against the lower mold platen 122, and through the telescopic reciprocating motion of the plurality of elastic members 131, the lower mold platen 122 can move toward the direction close to or away from the upper mold platen 112, so as to adjust the length of the plurality of lower ejector pins 125 extending into the lower mold cavity 124.

Wherein, the elastic member 131 is elastic for restoration. When the first driving member 132 outputs power, the elastic member 131 is elastically deformed under pressure to ensure that the upper platen 112 and the lower platen 122 can move away from each other, so that the length of the upper pin 115 extending into the upper mold cavity 114 is shorter or the upper pin exits from the upper mold cavity 114, and the length of the lower pin 125 extending into the lower mold cavity 124 is shorter or the lower pin exits from the lower mold cavity 124. When the power of the first driving member 132 is removed, the elastic member 131 is elastically restored to ensure that the upper platen 112 and the lower platen 122 can move toward each other, so that the upper pins 115 and the lower pins 125 extend into the upper mold cavity 114 and the lower mold cavity 124 respectively for a longer length.

Of course, the type of the elastic member 131 is not limited to the return spring provided above, but may be an elastic sheet, a flexible sheet, or other elements capable of elastically deforming. The present invention is not limited with respect to the specific type of the elastic member 131. Also, the first driving member 132 may be a driving cylinder, a driving motor, or other elements capable of outputting power, and the specific type of the first driving member 132 is not limited in the present invention.

In one embodiment, as shown in fig. 3 to 5, the upper platen 112 is spaced apart from the upper platen 111, and the lower platen 122 is spaced apart from the lower platen 121, so that when the power assembly 130 drives the upper platen 112 and the lower platen 122 to move toward or away from each other, the upper platen 112 and the lower platen 122 are provided with a space for avoiding the space, and the power assembly 130 is provided with an installation space. The power assembly 130 includes a plurality of second driving members 134, at least one second driving member 134 is disposed between the upper mold base plate 111 and the upper mold platen 112, and the second driving member 134 disposed between the upper mold base plate 111 and the upper mold platen 112 is used for providing a driving force for driving the upper mold platen 112 to move toward a direction close to or away from the lower mold platen 122, so that the upper mold platen 112 moves toward a direction close to or away from the lower mold platen 122. At least one second driving member 134 is disposed between the lower mold base plate 121 and the lower mold platen 122, and the second driving member 134 disposed between the lower mold base plate 121 and the lower mold platen 122 is used for providing a driving force for driving the lower mold platen 122 to move toward a direction close to or away from the upper mold platen 112, so that the lower mold platen 122 moves toward a direction close to or away from the upper mold platen 112. Specifically, when the second driving element 134 outputs power to drive the upper mold platen 112 and the lower mold platen 122 to move in the direction away from each other, the length of the upper ejector pins 115 driven by the upper mold platen 112 to extend into the upper mold cavity 114 is shorter, and the length of the lower ejector pins 125 driven by the lower mold platen 122 to extend into the lower mold cavity 124 is shorter, so as to clamp the coil with a higher height after being wound and formed; alternatively, the upper mold platen 112 drives the plurality of upper pins 115 to exit the upper mold cavity 114, and the lower mold platen 122 drives the plurality of lower pins 125 to exit the lower mold cavity 124, thereby completing the injection molding of the inductor. When the second driving member 134 outputs power to drive the upper mold platen 112 and the lower mold platen 122 to move toward a direction close to each other, the upper mold platen 112 drives the plurality of upper pins 115 to extend into the upper mold cavity 114 for a longer length, and the lower mold platen 122 drives the plurality of lower pins 125 to extend into the lower mold cavity 124 for a longer length, so as to clamp the coil with a smaller height after being wound. The second driving members 134 can drive the upper mold platen 112 and the lower mold platen 122 to move toward or away from each other, so as to adjust the length of the upper thimble 115 extending into the upper mold cavity 114 and the length of the lower thimble 125 extending into the lower mold cavity 124, so as to clamp coils of different specifications, thereby improving the applicability of the mold 100 for injection molding of inductors.

Further, as shown in fig. 3 to 5, at least one second driving member 134 is fixed on the upper mold base plate 111 by screwing, welding, etc., and an output end of the second driving member 134 is connected to the upper mold platen 112, so that at least one second driving member 134 is disposed between the upper mold base plate 111 and the upper mold platen 112, and the second driving member 134 can output power to drive the upper mold platen 112 to move toward or away from the lower mold platen 122. Similarly, at least one second driving member 134 is fixed on the lower die base plate 121 by screwing, welding, etc., and an output end of the second driving member 134 is connected to the lower die pressing plate 122, so that at least one second driving member 134 is disposed between the lower die base plate 121 and the lower die pressing plate 122, and the second driving member 134 can output power to drive the lower die pressing plate 122 to move toward or away from the upper die pressing plate 112.

The second driving member 134 is one of a driving cylinder and a driving motor. For the upper platen 112 and the lower platen 122 with larger volume and mass, the second driving member 134 is preferably a driving cylinder capable of outputting larger force to drive the upper platen 112 and the lower platen 122 to move toward or away from each other. When the requirement for the movement accuracy of the upper platen 112 and the lower platen 122 is high, the second driving unit 134 is preferably a driving motor, and the movement distance between the upper platen 112 and the lower platen 122 can be precisely adjusted. Of course, the second driving member 134 is not limited to the driving cylinder or the driving motor provided above, and may also be an element capable of outputting power, such as a driving cylinder, and the invention is not limited to the specific type of the second driving member 134.

In order to assemble and secure the upper needle 115 to the lower needle 125, in a preferred embodiment, the upper die assembly 110 further includes an upper die ejector plate 116, as shown in FIGS. 1-4. The upper ejector plate 116 is fixed to the upper molding plate 112 by screwing, welding, or the like, and a gap is formed between the upper ejector plate 116 and the upper molding plate 113, so that when the upper ejector plate 116 moves along with the upper molding plate 112, the gap between the upper ejector plate 116 and the upper molding plate 113 serves as a buffer space, so that the upper ejector pins 115 can extend and retract in the upper molding cavity 114, and the length of the upper ejector pins 115 extending into the upper molding cavity 114 is adjusted. The upper ejector plate 116 is provided with a plurality of first through holes 117, the plurality of upper ejectors 115 are correspondingly inserted into the plurality of first through holes 117, and the plurality of upper ejectors 115 are connected to the upper platen 112. In this embodiment, the plurality of upper pins 115 are inserted into the plurality of first through holes 117, and the ends of the plurality of upper pins 115 are fastened to the upper pressing plate 112 by bolts or the like, so as to assemble and fix the plurality of upper pins 115.

Likewise, the lower die assembly 120 also includes a lower die ejector plate 126. The lower ejector plate 126 is fixed on the lower platen 122 by screwing, welding, etc., and a gap is formed between the lower ejector plate 126 and the lower platen 123, so that when the lower ejector plate 126 moves along with the lower platen 122, the gap between the lower ejector plate 126 and the lower platen 123 serves as a buffer space, so that the lower ejector pins 125 can extend and retract in the lower cavity 124, and the length of the lower ejector pins 125 extending into the lower cavity 124 is adjusted. The lower ejector plate 126 is provided with a plurality of second through holes 127, a plurality of lower ejector pins 125 are correspondingly inserted into the plurality of second through holes 127, and the plurality of lower ejector pins 125 are connected to the lower platen 122. In this embodiment, the plurality of lower pins 125 are inserted into the plurality of second through holes 127, and the ends of the plurality of lower pins 125 are fastened to the lower platen 122 by bolts or the like, so as to assemble and fix the plurality of lower pins 125.

In order to complete the injection molding of the inductor, as shown in fig. 1 and 2, in a preferred embodiment, a powder injection port is opened on the upper mold plate 113 and/or the lower mold plate 123, and metal powder can be injected into the upper mold cavity 114 and the lower mold cavity 124 through the powder injection port, so that the injected metal powder is coated outside the coil under a certain pressure, thereby completing the injection molding of the inductor.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention. Therefore, the protection scope of the present patent should be subject to the appended claims.

Claims (10)

1. The utility model provides a mould for injection moulding inductor installs on the board, mould for injection moulding inductor is used for the shaping of inductor, the inductor include the coil and wrap in the outer metal powder of coil, its characterized in that, mould for injection moulding inductor includes power component and relative last mould subassembly and the lower mould subassembly that sets up, wherein:

the upper die assembly comprises an upper die base plate, an upper die pressing plate and an upper die plate, wherein the upper die pressing plate and the upper die plate are sequentially arranged on the upper die base plate;

the lower die assembly comprises a lower die bottom plate, a lower die pressing plate and a lower die plate, the lower die pressing plate and the lower die plate are sequentially arranged on the lower die bottom plate, the lower die bottom plate is movably arranged on the machine table, a lower die cavity corresponding to the upper die cavity is formed in the lower die plate, and a plurality of lower ejector pins capable of extending into or withdrawing from the lower die cavity are arranged on the lower die pressing plate;

the power assembly is arranged on the upper die assembly and/or the lower die assembly and used for providing driving force for driving the upper die pressing plate and the lower die pressing plate to move towards the direction close to or away from each other.

2. The mold for injection molding of the inductor according to claim 1, wherein the upper mold platen is disposed on the upper mold base plate at intervals, the lower mold platen is disposed on the lower mold base plate at intervals, the power assembly comprises a plurality of elastic members and a first driving member, at least one of the elastic members is disposed between the upper mold platen and the upper mold base plate, at least one of the elastic members is disposed between the lower mold platen and the lower mold base plate, and the first driving member is disposed on the upper mold platen or the lower mold platen and is configured to provide a driving force for driving the upper mold platen and the lower mold platen to move toward a direction away from each other.

3. The mold for injection molding of inductors according to claim 2, wherein a plurality of the elastic pieces are uniformly arranged between the upper mold platen and the upper mold base plate, a plurality of the elastic pieces are uniformly arranged between the lower mold platen and the lower mold base plate, and the deformation direction of the elastic pieces is consistent with the movement direction of the upper mold platen and the lower mold platen.

4. The mold according to claim 3, wherein one end of each of the plurality of elastic members disposed between the upper platen and the upper bottom plate is connected to the upper platen, the other end of each of the plurality of elastic members is connected to the upper bottom plate, and one end of each of the plurality of elastic members disposed between the lower platen and the lower bottom plate is connected to the lower platen, and the other end of each of the plurality of elastic members is connected to the lower bottom plate.

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

6. The mold for injection molding of inductor according to claim 1, wherein the upper mold platen is disposed on the upper mold platen at intervals, the lower mold platen is disposed on the lower mold platen at intervals, the power assembly includes a plurality of second driving members, at least one of the second driving members is disposed between the upper mold platen and the upper mold platen for providing a driving force for driving the upper mold platen to move toward or away from the lower mold platen, and at least one of the second driving members is disposed between the lower mold platen and the lower mold platen for providing a driving force for driving the lower mold platen to move toward or away from the upper mold platen.

7. The mold for molding an inductor as claimed in claim 6, wherein at least one of the second driving members is fixed to the upper mold base plate and has an output end connected to the upper mold platen, and at least one of the second driving members is fixed to the lower mold base plate and has an output end connected to the lower mold platen.

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

9. The mold for injection molding of the inductor according to claim 1, wherein the upper mold assembly further comprises an upper mold ejector plate, the upper mold ejector plate is fixed on the upper mold platen, and a gap is formed between the upper mold ejector plate and the upper mold platen, the upper mold ejector plate is provided with a plurality of first through holes, the plurality of upper ejector pins can be inserted into the plurality of first through holes correspondingly, and the end portions of the upper ejector pins are connected to the upper mold platen;

the lower die assembly further comprises a lower die ejector plate, the lower die ejector plate is fixed on the lower die pressing plate, a gap is reserved between the lower die pressing plate and the lower die plate, a plurality of second through holes are formed in the lower die ejector plate, a plurality of lower ejector pins can be correspondingly inserted into the second through holes, and the end portions of the lower ejector pins are connected to the lower die pressing plate.

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

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