TWI459420B - Method for manufacturing inductor with two stage filling powder and the structure thereof - Google Patents

Description

Method for manufacturing secondary powder feeding of inductor and structure thereof

The invention relates to an inductor manufacturing machine, in particular to a machine for manufacturing an inductor by a secondary powder feeding step.

The conventional combined inductor is mainly an I-shaped iron core having a Mn-Zn ferrite, the coil is wound around the I-shaped iron core, and the I-shaped iron core wound with the coil is assembled into one The cross section has a U-shaped cover to form a combined inductor. Since the combined inductor has a high magnetic permeability, a low saturation magnetic force, is easily saturated during use, and cannot withstand a large current, it has not been used.

Current inductors are required to withstand high currents, so most inductors such as chokes or chokes. The inductor is made by pressing powder, first winding an air-core coil, placing the air-core coil in the mold, pouring the iron powder into the mold and pressing the coil into an inductor, and the powder is pressed. The magnetic permeability is low and the saturation magnetic force is high. When used, the inductor is not easily saturated and can withstand a large current.

In the above-mentioned inductor using the powder pressing, a coil piece having a plurality of coils is first placed on the middle mold of the undershooting module, and the die cover of the machine driving the stripping module is displaced to the middle mold. The mold is closed so that the through hole of the mold cover frames the cavity of the middle mold. At this time, the machine drives the powder feeding bottom plate to slide on the mold cover, and the metal powder is filled into the mold of the middle mold when the powder feeding bottom plate slides. In the hole, after the metal powder is filled in the cavity, the middle mold is driven by the machine to generate vibration or shaking, so that the metal powder can be smoothly filled in the cavity of the middle mold, and the machine is driven again. When the punching module is displaced to the mold cover, the upper extrusion forming rod of the upper punching module and the lower extruded forming rod of the lower punching module are filled with the metal powder in the cavity of the middle mold The extrusion forms a core structure covering the coil, that is, the inductor is fabricated.

Since the powder feeding bottom plate has only one feeding operation, the amount of metal powder filled in each cavity of the middle mold is not uniform, resulting in uneven weight of each extruded inductor. The filling accuracy is lowered, and the metal powder is not easy to manufacture, so that the metal powder filled in the cavity of the middle mold needs to be shaken or shaken to make the metal powder smoothly slide in the cavity of the middle mold, thus causing difficulty in production.

Therefore, the main object of the present invention is to solve the traditional deficiency and avoid the existence of the missing. The invention utilizes the secondary powder feeding to make the inductor, so that the filling precision is increased, the difficulty of powder powdering is solved, and each extruded inductor is completed. The error value of the weight is within the set range value.

In order to achieve the above object, the present invention provides a method for manufacturing a secondary powder feeding of an inductor, which is mainly for manufacturing an inductor in a machine having a lower punching module, a stripping module, an upper punching module, and a powder feeding bottom plate, include:

The machine drives the stripping module to be displaced to the middle mold of the undershooting module, and is clamped with the middle mold;

The machine drives the powder feeding bottom plate to slide on the stripping module, and the powder feeding bottom plate fills the metal powder into the middle mold during the sliding, and the powder feeding bottom plate returns to the original position after the powder is delivered, to complete the first Secondary powder feeding;

After the first powder feeding, the machine drives the stripping module to return to the original mold to return to the original position;

Place the coil material on the middle mold;

The machine again drives the stripping module to be displaced to the middle mold of the lower punching module;

The machine again drives the powder feeding bottom plate to slide on the stripping module. After the powder feeding bottom plate fills the metal powder into the middle mold, the powder feeding bottom plate sends the powder and then returns to the original position to complete. Second feeding;

After the secondary powder feeding, the machine drives the upper punching module to be displaced downward to the stripping die assembly mold, and the metal powder filled in the middle mold is extruded to form a core structure coated on the outside of the coil.

Wherein, the undershooting module has a base mounted on the machine base and a middle mold assembled on the base, the base has a plurality of lower extruded rods arranged in a matrix, and the middle mold has a plate The body has a boss on the boss, and the boss has a cavity for passing the lower extruded rods.

Wherein, the two sides of the cavity have protrusions of different volume sizes, and the two protrusions are used for fixing the coil piece so that the coil on the coil piece can be located on the cavity.

Wherein, the stripping module has a mold cover having through holes arranged in a matrix, the through holes corresponding to the passages on the boss of the middle mold.

The upper punching module is mounted on the machine table, and has a pressure plate driven by the machine table, and one side of the pressure plate has a plurality of upper extrusion molding rods arranged in a matrix, and the upper extrusion molding rods Corresponding to the through holes on the mold cover.

Wherein, the die cover driving the stripping module is displaced to the boss of the middle die, so that the two protruding portions of the boss are framed by the through holes of the die cover.

Wherein, the metal powder is filled in the mold hole of the middle mold framed by the through hole of the mold cover.

Wherein, the coil material is placed on the middle mold, and is positioned by the two protrusions of the boss so that the coil is located in the mold cavity.

Wherein, after the coil material is placed in the middle mold, the machine table again drives the mold cover of the stripping module to be displaced to the boss of the middle mold.

Wherein, the machine platform drives the powder feeding bottom plate to slide on the through hole of the mold cover again, and during the sliding process, the powder feeding bottom plate fills the metal powder into the mold of the middle mold framed by the through hole of the mold cover. In the hole.

After the secondary powder feeding is finished, the machine drives the upper punching module to be displaced downward to the stripping module for clamping, so that the upper extrusion forming rod of the upper punching module protrudes into the through hole of the mold cover. The metal extruded powder filled in the cavity of the middle mold framed by the through hole is extruded with the lower extruded rod in the middle mold to form an iron core coated on the coil.

To achieve the above object, the present invention provides a secondary powder feeding structure of an inductor, comprising:

a punching module having a base mounted on the machine base and a middle mold assembled on the base, the base having a plurality of lower extruded rods passing through the middle mold;

a stripping module is mounted on the machine table and located above the lower punching module, and has a mold cover having a through hole arranged in a matrix; an upper punching module is mounted on the machine On the table and above the stripping module, there is a platen driven platen having a plurality of upper extruded rods on one side of the plate, the upper extruded bars corresponding to the die cover Through holes; and,

a powder feeding bottom plate is installed on the machine platform and is not on the side of the lower punching module, the stripping module and the upper punching module;

Wherein, the machine driving the stripping module is displaced to the middle mold for clamping, and the machine further drives the powder feeding bottom plate to slide on the stripping module and performs the first filling of the powder in the middle mold, then feeding the powder bottom plate and taking off The material module is returned to the original position, and the coil material is placed on the middle mold. After the machine table drives the stripping module to shift to the middle mold, the machine drives the powder feeding bottom plate on the stripping module. After sliding and carrying out the second filling, returning to the original position. At this time, the machine drives the upper punching module to be displaced downward to the stripping die assembly mold, and the metal powder filled in the middle mold is extruded to form a coating on the outside of the coil. Core structure.

Wherein, the middle mold has a convex shape and has a plate body thereon, and the plate body has a boss having a cavity for passing the lower extruded rods.

Wherein, the two sides of the cavity have protrusions of different volume sizes, and the two protrusions are used for fixing the coil piece so that the coil on the coil piece can be located on the cavity.

Wherein, the lower extruded rods are arranged in a matrix.

The through hole on the mold cover corresponds to the cavity and the two protrusions on the boss.

The plurality of guide holes are arranged on the two sides of the mold cover, and the plurality of guide holes are connected to the plurality of guide rods on the machine table, and the guide rods are driven by the machine table, so that the guide rods drive the mold cover to Lower the displacement to the boss of the middle mold to close the mold.

The powder feeding bottom plate has a long bottom plate, and the long bottom plate has an output hole. The long bottom plate has a casing on one side thereof, the inside of the casing is hollow and forms a space with the long bottom plate. Accommodate space.

Wherein, the upper extruded rods are arranged in a matrix.

100~114‧‧‧Steps

1‧‧‧Under the module

11‧‧‧Base

111‧‧‧Under extrusion rod

112‧‧‧止高柱

12‧‧‧中模

121‧‧‧ board

122‧‧‧Boss

123‧‧‧ cavity

123a, 123b‧‧‧ two projections

124‧‧‧Perforation

125‧‧‧through hole

2‧‧‧Removal module

21‧‧‧Mold cover

22‧‧‧through holes

23‧‧‧block

24‧‧‧ Guide column

25‧‧‧Lined slip mat

26‧‧‧Sliding components

27‧‧‧Flexible components

28‧‧‧Group holes

3‧‧‧Upper module

31‧‧‧ pressure plate

32‧‧‧Upper extruded rod

33‧‧‧ accommodating slots

4‧‧‧Feeding floor

41‧‧‧Long floor

42‧‧‧Output hole

43‧‧‧Shell

44‧‧‧ accommodating space

5‧‧‧ coil material

51‧‧‧ coil

6‧‧‧core structure

The first figure is a schematic flow chart of the secondary powder feeding structure of the inductor of the present invention.

The second figure is a perspective exploded view showing the appearance of the secondary powder feeding structure of the inductor of the present invention.

The third figure is a schematic diagram of the action of the secondary powder feeding structure of the inductor made by the present invention.

The fourth figure is a schematic diagram of the secondary powder feeding action of the inductor made by the machine of the present invention.

The fifth figure is a three-dimensional diagram of the secondary powder feeding operation of the inductor made by the machine of the present invention.

The sixth figure is a schematic diagram of the secondary powder feeding operation of the inductor made by the machine of the present invention.

The seventh figure is a schematic diagram of the secondary powder feeding operation of the inductor made by the machine of the present invention.

The eighth figure is a schematic diagram of the secondary powder feeding action of the inductor made by the machine of the present invention.

The ninth drawing is a schematic view of the appearance of the inductor of the present invention.

The technical content and detailed description of the present invention are as follows:

Please refer to the first figure, which is a schematic flow chart of the secondary powder feeding structure of the inductor of the present invention. As shown in the figure: the method for manufacturing the secondary powder feeding of the inductor of the present invention is mainly for a machine having a lower punching module, a stripping module, an upper punching module and a powder feeding bottom plate (also referred to as a cold press) In the present invention, the inductor is made by secondary powder feeding on the machine abbreviation. First, as in step 100, the machine drives the die cover of the stripping module to be displaced to the boss of the middle mold, so that the mold is closed. The two projections of the boss are framed by the through holes of the mold cover.

Step 102, the machine drives the powder feeding bottom plate to slide on the through hole of the mold cover, and in the process of sliding, the powder feeding bottom plate fills the ferrite metal powder into the cavity of the through hole to frame the boss. After the powder feeding bottom plate is finished, the powder returns to the original position to complete the first feeding operation.

In step 104, after the first powder feeding is finished, the machine drives the mold cover of the stripping module to return to the original mold.

In step 106, the coil material is placed on the two protrusions of the boss so that the coil is located in the cavity of the two protrusions.

Step 108, after the coil material is placed in the middle mold, the machine again drives the mold cover of the stripping module to be displaced onto the boss of the middle mold to perform mold clamping.

Step 110, the machine again drives the powder feeding bottom plate to slide on the through hole of the mold cover, and during the sliding process, the powder feeding bottom plate fills the ferrite metal powder into the mold framed by the through hole of the mold cover. In the hole, the powder feeding bottom plate returns to the original position after the powder is finished, to complete the second feeding operation.

Step 112, after the second powder feeding is finished, the machine drives the upper punching module to be displaced downward to the stripping module for clamping, so that the upper extrusion forming rod of the upper punching module protrudes into the mold cover. In the through hole and the cavity, the metal powder filled in the cavity of the boss is extruded together with the lower extruded rod in the middle mold to form a core structure covering the outside of the coil.

Step 114, after the extrusion is completed, the machine drives the overshooting module and the stripping module back to the original position, and then the extruded inductor is removed to the hot press of the next processing program. Hot pressing.

Please refer to the second figure, which is a perspective exploded view showing the appearance of the secondary powder feeding structure of the inductor of the present invention, and please refer to the sixth drawing. As shown in the figure: the secondary powder feeding structure of the inductor made by the invention is mounted on the machine platform, comprising: a punching module 1, a stripping module 2, an upper punching module 3 and a feeding foundation. Board 4.

The undershooting module 1 has a base 11 mounted on the machine base and a middle mold 12 assembled on the base 11. The base 11 has a plurality of lower extruded rods 111 arranged in a matrix. The lower extruding rods 111 have a plurality of anti-high pillars 112 on both sides thereof, and the anti-collision cylinders 112 have an anti-collision function to prevent the stripping module 2 from being pressed down too much to hit the middle mold 12. In addition, the middle mold 12 has a convex shape and has a plate body 121. The plate body 121 has a boss 122 having a plurality of corresponding positions and passing the lower extruded rods 111. a cavity 123 having convex portions 123a, 123b of different volume sizes on both sides of the cavity 123 (as shown in FIG. 6), the two protrusions 123a, 123b are used to fix the coil material 5, so that The coil 51 on the coil web 5 can be located on the cavity 123. Further, on both sides of the boss 122 of the plate body 121, there are a plurality of through holes 124 through which the high column 112 passes, and the through holes 124 have a through hole 125 having a hole diameter larger than the hole diameter of the through hole 124.

The stripping module 2 has a mold cover 21 having a through hole 22 arranged in a matrix, the through hole 22 corresponding to the plurality of cavities 123 on the boss 122 and the two protrusions Parts 123a, 123b. In addition, the through hole 22 of the die cover 21 has a plurality of stoppers 23 on both sides thereof, and each of the stoppers 23 has a guide post 24 extending through the die cover 21 and the stopper 23, and the guide posts 24 are respectively provided on both ends thereof. A lining sliding pad 25 is disposed. The lining sliding pad 25 has a plurality of sliding elements 26, and the lining sliding pad 25 at one end of the guiding columns 23 and the stopper 23 have a lower The punching module 1 is in the opposite direction of the elastic member 27, and the guide posts 24 and the stopper 23 form a cross-shaped guide post, and when the mold cover 21 is displaced, the boss 122 of the middle mold 12 can be accurately displaced. on. Moreover, the guide post 24 of the die cover 21 has a plurality of array holes 28 on both sides thereof, and the set of the holes 28 are received by a plurality of guides (not shown) on the machine table, and the guides are received by the machine. When driven, the guide rods move the mold cover 21 downward to the boss 122 of the middle mold 12.

The upper punching module 3 is mounted on the machine table and has a pressure plate 31 driven by the machine table. The pressing plate 31 has a plurality of upper extruded rods 32 arranged in a matrix on one side of the pressing plate 31. The press forming bars 32 correspond to the through holes 22 in the die cover 21. In addition, a plurality of accommodating grooves 33 for entering the guide posts 24 are provided on both sides of the extruded rods 32 of the pressure plate 31.

The powder feeding bottom plate 4 is mounted on the machine table and has a long bottom plate 41. The long bottom plate 41 has an output hole 42. The long bottom plate 41 has a casing 43 on one side thereof. The interior of the casing 43 is hollow and forms an accommodation space 44 with the long bottom plate 41. The accommodation space 44 is filled with the metal powder.

Please refer to the third to ninth figures, which are actions 1 to 6 of the secondary powder feeding structure of the inductor of the present invention and a schematic view of the appearance of the inductor. As shown in the figure, when the inductor is manufactured according to the present invention, the die cover 21 of the machine driving the stripping module 2 is displaced to the boss 122 of the middle mold 12 for clamping, so that the two projections 123a of the boss 122 are formed. And 123b is framed by the through hole 22 of the mold cover 21, at this time, the machine drives the powder feeding bottom plate 4 to slide on the through hole 22 of the mold cover 21, and the powder feeding bottom plate 4 will be ferrite metal during the sliding process. The powder is filled in the cavity 123 framed by the through hole 22, and the powder feeding bottom plate 4 is returned to the original position after the powder is delivered to complete the first feeding operation.

After the first powder feeding, the machine drives the stripping module 2 to return to the home position 12, and the operator can place the coil material 5 on the boss 122. The two projections 123a, 123b of the 122 are positioned such that the coil 51 is located in the cavity 123. After the coil material piece 5 is placed on the cavity 123 of the boss 122, the machine table again drives the die cover 21 of the stripping module 2 to be displaced onto the boss 122 of the middle mold 12 to perform mold clamping, and the machine table drives the foundation again. The plate 4 slides on the through hole 22 of the mold cover 21, and the powder feed base plate 4 fills the ferrite metal powder into the cavity 123 framed by the through hole 22 of the mold cover 21 during the sliding process. The powder feeding bottom plate 4 is returned to the original position to complete the second feeding operation.

After the second feeding is completed, the machine drives the upper punching module 3 to be displaced downward, so that the upper extrusion forming rod 31 of the upper punching module 3 projects into the through hole 22, and the inner mold 12 The lower extruded rod 111 together presses the metal powder filled in the cavity 123 framed by the through hole 22 to form a core structure 6 which is overcoated on the outside of the coil 51. After the extrusion is completed, the machine drives the overshoot module 3 and the stripping module 2 back to the original position, and then the extruded inductor is removed to another station for hot pressing.

Due to the above-mentioned secondary powder feeding procedure, the metal powder in the cavity on the boss of the middle mold is dispersed and the powder filling average is increased, and the powder grinding difficulty is solved, and the weight of each extruded inductor is made. The error values are all within the set range value.

The above are only the preferred embodiments of the present invention and are not intended to limit the scope of the present invention. That is, the equivalent changes and modifications made by the scope of the patent application of the present invention are covered by the scope of the invention.

100~114‧‧‧Steps

Claims (19)

The invention relates to a method for manufacturing a secondary powder feeding of an inductor, which mainly comprises performing an inductor on a machine having a lower punching module, a stripping module, an upper punching module and a powder feeding bottom plate, comprising:
The machine drives the stripping module to be displaced to the middle mold of the undershooting module, and is clamped with the middle mold;
The machine drives the powder feeding bottom plate to slide on the stripping module, and the powder feeding bottom plate fills the metal powder into the middle mold during the sliding, and the powder feeding bottom plate returns to the original position after the powder is delivered, to complete the first Secondary powder feeding;
After the first powder feeding, the machine drives the stripping module to return to the original mold to return to the original position;
Place the coil material on the middle mold;
The machine again drives the stripping module to be displaced to the middle mold of the lower punching module;
The machine again drives the powder feeding bottom plate to slide on the stripping module. After the powder feeding bottom plate fills the metal powder into the middle mold, the powder feeding bottom plate sends the powder and then returns to the original position to complete. Second feeding;
After the secondary powder feeding, the machine drives the upper punching module to be displaced downward to the stripping die assembly mold, and the metal powder filled in the middle mold is extruded to form a core structure coated on the outside of the coil. The method for manufacturing a secondary powder feeding method according to the first aspect of the invention, wherein the under step module of step a has a base mounted on the machine base and a middle mold assembled on the base, the base A lower extruded rod having a plurality of matrix arrays, the middle mold having a plate body having a boss having a cavity for passing the lower extruded rods. The method for manufacturing a secondary powder feeding method according to the second aspect of the invention, wherein the two sides of the cavity have protrusions of different volume sizes, and the two protrusions are used for fixing the coil piece to make the coil The coil on the web can be located on the cavity. The method for manufacturing a secondary powder feeding method according to the third aspect of the invention, wherein the stripping module of the step a has a mold cover having a through hole arranged in a matrix, the through hole corresponding to the middle mold The channels on the boss. The method for manufacturing a secondary powder feeding method according to the fourth aspect of the invention, wherein the g-stepping module is mounted on the machine table, and has a pressure plate driven by the machine table, and one side of the pressure plate The upper extrusion molding rods are arranged in a plurality of matrixes, and the upper extrusion molding rods correspond to the through holes on the mold cover. The method for manufacturing a secondary powder feeding method according to claim 5, wherein in the step a, the machine drives the die cover of the stripping module to be displaced to the boss of the middle mold, so that the boss The two projections are framed by the through holes of the mold cover. The secondary powder feeding method according to the sixth aspect of the invention, wherein in the step b, the powder feeding bottom plate fills the metal powder into the cavity of the middle mold framed by the through hole of the mold cover. The method for manufacturing a secondary powder feeding method according to claim 7, wherein in the step d, the coil material piece is placed on the middle mold, and the two convex portions of the convex portion are positioned to make the coil In the cavity. The method for manufacturing a secondary powder feeding method according to Item 8 of the patent application, wherein, after the coil material sheet is placed in the middle mold in the e step, the machine table again drives the mold cover of the stripping module to be displaced to the middle mold. Mold on the stage. The method for producing a secondary powder feeding method according to claim 9, wherein the machine in the f step drives the powder feeding bottom plate to slide on the through hole of the mold cover, and the foundation is fed during the sliding process. The plate fills the metal powder into the cavity of the middle mold framed by the through hole of the mold cover. The method for manufacturing a secondary powder feeding method according to claim 10, wherein, after the second feeding of the g step, the machine drives the upper punching module to be displaced downward to the stripping module for clamping, so that The upper extrusion molding rod of the upper punching module protrudes into the through hole of the mold cover, and the lower extruded molding rod in the middle mold fills the metal powder in the cavity of the middle mold framed by the through hole Extrusion forms an iron core that is overcoated on the coil. A secondary powder feeding structure of an inductor, comprising:
a punching module having a base mounted on the machine base and a middle mold assembled on the base, the base having a plurality of lower extruded rods passing through the middle mold;
a stripping module is mounted on the machine table and located above the lower punching module, and has a mold cover thereon, the mold cover has a through hole arranged in a matrix;
An upper punching module is mounted on the machine table and located above the stripping module, and has a press plate driven by the machine table, and a plurality of upper extruded rods are arranged on one side of the pressing plate, and the upper pressing Pressing the forming rods corresponding to the through holes in the mold cover; and,
a powder feeding bottom plate is installed on the machine platform and is not on the side of the lower punching module, the stripping module and the upper punching module;
Wherein, the machine driving the stripping module is displaced to the middle mold for clamping, and the machine further drives the powder feeding bottom plate to slide on the stripping module and performs the first filling of the powder in the middle mold, then feeding the powder bottom plate and taking off The material module is returned to the original position, and the coil material is placed on the middle mold. After the machine table drives the stripping module to shift to the middle mold, the machine drives the powder feeding bottom plate on the stripping module. After sliding and carrying out the second filling, returning to the original position. At this time, the machine drives the upper punching module to be displaced downward to the stripping die assembly mold, and the metal powder filled in the middle mold is extruded to form a coating on the outside of the coil. Core structure. The secondary powder feeding structure according to claim 12, wherein the middle mold has a convex shape and has a plate body thereon, the plate body has a boss, and the boss has the same The cavity through which the extruded rod is passed. The secondary powder feeding structure according to claim 13, wherein the two sides of the cavity have protrusions of different volume sizes, and the two protrusions are used for fixing the coil material to make the coil material The coil on the sheet can be placed on the cavity. The secondary powder feeding structure according to claim 14, wherein the lower extruded rods are arranged in a matrix. The secondary powder feeding structure according to claim 15, wherein the through hole on the mold cover corresponds to the cavity and the two protrusions on the boss. The secondary powder feeding structure according to claim 16, wherein the mold cover has a plurality of array holes on both sides thereof, and the plurality of connection holes are connected to the plurality of guide rods on the machine table, The rod is driven by the machine table, so that the guide rods move the mold cover downward to the upper mold clamping. The secondary powder feeding structure of claim 17, wherein the powder feeding bottom plate has a long bottom plate, the long bottom plate has an output hole, and the long bottom plate has a casing on one side thereof, The inside of the casing is hollow and forms an accommodation space with the long bottom plate. The secondary powder feeding structure according to claim 18, wherein the upper extruded rods are arranged in a matrix.