Magnetic powder molding device and magnetic powder molding method

Abstract

The present invention discloses a magnetic powder molding apparatus and a magnetic powder molding method. [Solution] The magnetic powder molding device includes a frame, a die lifting mechanism, a pressure plate pressing mechanism, a punch forming mechanism, and a height locking mechanism provided on the frame, the die lifting mechanism includes a die and a first driving member for driving the reciprocating lifting and lowering of the die, the pressure plate pressing mechanism includes a pressure plate and a second driving member for driving the lifting and lowering of the pressure plate, the punch forming mechanism includes a punch and a third driving member for driving the lifting and lowering of the punch, and the height locking mechanism includes a first locking member and a second locking member, the first locking member is used to lock or release the pressure plate, and the second locking member is used to lock or release the punch. According to the present invention, the filling density of the magnetic powder is kept uniform and the density distribution difference in the height direction of the magnetic powder is reduced, the lifting height of the die is adjustable, and the presser plate and punch can be locked at any height.

Description

[Technical field]

[0001] The present invention relates to the field of powder molding technology, and more particularly to a magnetic powder molding apparatus and a magnetic powder molding method. [Background technology]

[0002] At present, with the trend toward higher frequencies and smaller sizes of electronic components, the demands on inductor components are becoming increasingly strict, and the demands on the molding quality of the magnetic powder for inductor components are also becoming increasingly higher.

[0003] In the prior art, the molding of magnetic powder is carried out by filling the magnetic powder into the molding cavity of the mold, and then the punch extends into the molding cavity to apply molding pressure to the magnetic powder. In this process, the mold needs to vibrate up and down, and generally, the air cylinder drives the rise of the mold and the punch, and the fall height is set by the collision block structure to realize the reciprocating motion, and the lifting height of the mold is controlled by the air cylinder, so the precision cannot meet the process requirements. Summary of the Invention [Problem to be solved by the invention]

[0004] SUMMARY OF THE PRESENT EMBODIMENTS The present invention aims to provide a magnetic powder molding apparatus and a magnetic powder molding method in order to solve the technical problems in the prior art. [Means for solving the problem]

[0005] In a first aspect, the present invention provides a magnetic powder molding apparatus, the magnetic powder molding apparatus including a frame, a die lifting mechanism, a press plate pressing mechanism, a punch forming mechanism, and a height lock mechanism provided on the frame, The die lifting mechanism includes a die and a first drive member for driving the die to move up and down in a reciprocating manner, and a molding cavity is formed at the top of the die. The pressure plate pressing mechanism rises and falls synchronously following the rise and fall of the mold, and the pressure plate pressing mechanism includes a pressure plate and a second driving member for driving the rise and fall of the pressure plate, and a passage groove is opened in the pressure plate, and the passage groove corresponds to the molding cavity, the punch forming mechanism includes a punch and a third driving member that drives the lifting and lowering of the punch, and the punch is capable of extending into the forming cavity after passing through the passing groove to form a forming engagement; The height locking mechanism includes a first locking member and a second locking member, the first locking member being used to lock the height position of the pressing plate by locking or releasing the pressing plate, and the second locking member being used to lock the height position of the punch by locking or releasing the punch.

[0006] In the magnetic powder molding apparatus as described above, preferably, the frame includes a base, a first guide rod, and a top plate, the bottom end of the first guide rod being fixed to the base, and the top end of the first guide rod being fixedly connected to the top plate.

[0007] In the magnetic powder molding apparatus as described above, preferably, the first driving member includes a first driving motor, a rotating plate, and a roller, an end of an output shaft of the first driving motor is connected to the rotating plate, an axis of the rotating plate overlaps with an axis of the output shaft of the first driving motor, the roller is eccentrically arranged on the plate surface of the rotating plate, the mold includes a bottom plate, a mold body, and a connecting plate, the mold body is fixed to the bottom plate, the bottom plate is guided and engaged with the first guide rod, and the connecting plate has one end connected to the bottom plate and the other end abuts against the roller.

[0008] In the magnetic powder molding apparatus as described above, preferably, a code wheel for measuring a rotation angle of the rotating disk is provided in the circumferential direction of the rotating disk.

[0009] In the magnetic powder molding apparatus as described above, preferably, the second driving member includes a first driving air cylinder, a second guide rod, and a first bracket, the bottom end of the second guide rod is connected to the bottom plate, the first bracket is located above the mold, the first driving air cylinder is fixed to the top of the first bracket, the piston rod of the first driving air cylinder extends downward, the end of the piston rod of the first driving air cylinder is connected to the top end of the second guide rod, the pressing plate is fixed to the bottom of the first bracket, and the pressing plate is guided and engaged with the second guide rod.

[0010] In the magnetic powder molding apparatus as described above, preferably, there are two of the first driving air cylinders and two of the second guide rods, the two first driving air cylinders and the two second guide rods are all arranged in parallel at a distance from each other, and the position of the first driving air cylinder corresponds to the position of the second guide rod.

[0011] In the magnetic powder molding apparatus as described above, preferably, the third driving member includes a first driving electric cylinder and a second bracket, an accommodation space is formed within the first bracket, the second bracket is accommodated within the accommodation space, the first driving electric cylinder is fixed to the top plate, the punch is fixed to a bottom of the second bracket, and the output shaft of the first driving electric cylinder extends downward and passes through the first bracket and the second bracket in sequence, and then is connected to the punch.

[0012] In the magnetic powder molding apparatus as described above, preferably, the third driving member further includes a third guide rod, the third guide rod is fixed to the pressing plate, and the second bracket is guide-engaged with the third guide rod.

[0013] In the magnetic powder molding apparatus as described above, preferably, the first locking member is fixed to the first bracket, the second locking member is fixed to the second bracket, and the output shaft of the first driving electric cylinder is provided to pass through the first locking member and the second locking member in that order.

[0014] In a second aspect, the present invention provides a magnetic powder molding method for molding magnetic powder using the magnetic powder molding apparatus, the magnetic powder molding method comprising: Step S100 of placing the mold at a predetermined height; Step S101 in which the second driving member is actuated to drive the pressing plate downward until the pressing plate is pressed against the die, thereby pressing the die; Step S102 in which the third driving member is actuated to drive the punch downward, the punch is actuated to a predetermined height, and the height lock mechanism is actuated to fix the position of the punch; Step S103: the first driving member is operated to drive the die to reciprocate up and down at a set height and speed; Step S104 in which the die, the pressing plate, and the punch return to their initial positions; and step S105, in which the magnetic powder compacted in the mold is removed and the flow is completed. Effect of the Invention

[0015] Compared to the prior art, the present invention provides a die lifting mechanism and a height locking mechanism, which allows the die to be raised and lowered in a reciprocating manner, thereby maintaining a uniform filling density of the magnetic powder and reducing the density distribution difference in the height direction of the magnetic powder. It also makes it possible to adjust the lifting height of the die and lock the pressure plate and punch at any desired height. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a perspective view of the overall structure of the present invention. [Diagram 2] FIG. 2 is a side view of the overall structure of the present invention. [Diagram 3] FIG. 3 is a cross-sectional view taken along line AA in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] The embodiments described below with reference to the drawings are illustrative and are intended to explain the present invention only and cannot be construed as limiting the present invention.

[0018] As shown in Figures 1 to 3, an embodiment of the present invention provides a magnetic powder molding apparatus, which includes a frame 10, a die lifting mechanism 20, a press plate pressing mechanism 30, a punch forming mechanism 40 and a height locking mechanism 50 provided on the frame 10.

[0019] The die lifting mechanism 20 includes a die 21 and a first driving member for driving the die 21 to rise and fall in a reciprocating manner. A molding cavity 215 is formed at the top of the die 21, and magnetic powder is filled into the molding cavity 215 and molded into a magnetic powder body. The first driving member can drive the die 21 to rise and fall in a reciprocating manner, thereby maintaining the filling density of the magnetic powder body uniform and reducing the density distribution difference in the height direction of the magnetic powder body.

[0020] The pressure plate pressing mechanism 30 rises and falls in sync with the rise and fall of the mold 21, and includes a pressure plate 31 and a second driving member for driving the rise and fall of the pressure plate 31. The pressure plate pressing mechanism 30 is located above the mold lifting mechanism 20, and after the pressure plate 31 descends to a predetermined height, the bottom of the pressure plate 31 is pressed against the top of the mold 21, and the bottom surface of the pressure plate 31 is bonded to the top surface of the mold 21. When the first driving member drives the mold 21 to rise and fall, the pressure plate 31 can rise and fall reciprocatingly together with the mold 21. The pressure plate 31 has a passing groove that corresponds to the molding cavity 215, and is located above the molding cavity 215, and the inner diameter of the passing groove is larger than the inner diameter of the molding cavity 215.

[0021] The punch forming mechanism 40 includes a punch 41 and a third driving member which drives the punch 41 to rise and fall. The punch forming mechanism 40 is positioned above the pressure plate pressing mechanism 30. In the initial state, the punch 41 is positioned above the pressure plate 31, and the outer contour surface of the punch 41 fits the inner contour surface of the forming cavity 215. After the pressure plate 31 is pressed against the mold 21, the third driving member is activated to lower the punch 41 to a predetermined height.

[0022] The height locking mechanism 50 includes a first locking member 51 and a second locking member 52. The first locking member 51 is used to lock or release the pressing plate 31 so that the pressing plate 31 can be locked at any height, and the second locking member 52 is used to lock or release the punch 41 so that the punch 41 can be locked at any height.

[0023] In the present invention, by providing a die lifting mechanism 20 and a height locking mechanism 50, the die 21 can be raised and lowered in a reciprocating manner, thereby maintaining a uniform filling density of the magnetic powder and reducing the difference in density distribution of the magnetic powder in the height direction. The lifting height of the die 21 can also be adjusted, and the pressure plate 31 and punch 41 can be locked at any desired height.

[0024] In an embodiment of the present application, as shown in Figures 1 and 3, a frame 10 includes a base 11, a first guide rod 12, and a top plate 13, and two first guide rods 12 are provided, the two first guide rods 12 are provided parallel to each other, the first guide rods 12 extend along the direction of gravity, the bottom end of the first guide rod 12 is fixed to the base 11, and the top end of the first guide rod 12 is fixedly connected to the top plate 13. A reinforcing plate 14 is further provided between the top plate 13 and the base 11, and both ends of the reinforcing plate 14 are connected to the top plate 13 and the base 11, respectively, thereby reinforcing the strength of the entire frame 10.

[0025] As shown in FIG. 1, the first drive member includes a first drive motor 22, a rotating plate 23, and a roller 24. The first drive motor 22 is fixed to the base 11 by a motor fixing base. The output shaft of the first drive motor 22 extends along the horizontal direction. The end of the output shaft of the first drive motor 22 is connected to the rotating plate 23. The axis of the rotating plate 23 overlaps with the axis of the output shaft of the first drive motor 22. The roller 24 is eccentrically disposed on the surface of the rotating plate 23.

[0026] As shown in FIG. 3, the mold 21 includes a bottom plate 211, a mold body 214, and a connecting plate 216. A molding cavity 215 is provided in the mold body 214. The mold body 214 is fixed to the bottom plate 211. A first through hole 212 is provided at a position of the bottom plate 211 corresponding to the first guide rod 12. A first sleeve 213 is fixed in the first through hole 212. The first guide rod 12 is gap-engaged in the first sleeve 213, thereby guiding and engaging the bottom plate 211 with the first guide rod 12. The connecting plate 216 has one end connected to the bottom plate 211 and the other end abutting against the roller 24. The first driving motor 22 is operated to rotate the turntable 23. The connecting plate 216 is constantly pressed against the roller 24, so that power is transmitted to the connecting plate 216 via the roller 24, thereby driving the mold body 214 to move up and down reciprocally.

[0027] In an embodiment of the present application, as shown in Figures 1 and 3, a code wheel 25 for measuring the rotation angle of the turntable 23 is provided in the circumferential direction of the turntable 23, and in a feasible embodiment, a surface of the code wheel 25 is provided with a plurality of notches arranged in a ring shape at intervals, and a light beam is emitted from a light source on one side of the code wheel 25, which is further received by a photoelectric conversion element on the other side of the code wheel 25 and converted into a corresponding electrical signal, thereby calculating the rotation angle of the code wheel 25 and also obtaining the lifting height of the mold body 214.

[0028] In an embodiment of the present application, as shown in FIGS. 1 and 3 , the second driving member includes a first driving air cylinder 32, a second guide rod 33, and a first bracket 34, the bottom end of the second guide rod 33 is connected to the bottom plate 211, the first bracket 34 is located above the mold 21, the cylinder body of the first driving air cylinder 32 is fixed to the top of the first bracket 34, the piston rod of the first driving air cylinder 32 extends downward, and the end of the piston rod of the first driving air cylinder 32 is connected to the top end of the second guide rod 33 via a coupling, the pressing plate 31 is fixed to the bottom of the first bracket 34, a second passing hole 35 is provided at a position of the pressing plate 31 corresponding to the second guide rod 33, a second sleeve 36 is fixed in the second passing hole 35, and the second guide rod 33 is gap-engaged in the second sleeve 36, whereby the pressing plate 31 is guided and engaged with the second guide rod 33.

[0029] When the first driving air cylinder 32 is activated, the piston rod of the first driving air cylinder 32 extends and retracts. In this case, since the end of the piston rod of the first driving air cylinder 32 is fixedly connected to the first guide rod 12 and the cylinder body of the first driving air cylinder 32 is fixed to the first bracket 34, the first bracket 34 is driven to move up and down, thereby also driving the pressure plate 31 to move up and down.

[0030] Furthermore, there are two first driving cylinders 32 and two second guide rods 33, and the two first driving cylinders 32 and the two second guide rods 33 are all arranged in parallel at a distance from each other, and the position of the first driving cylinders 32 corresponds to the position of the second guide rods 33, thereby providing uniform and stable pressure to the pressure plate 31, and thereby enabling the pressure plate 31 to maintain a horizontal state during its downward movement.

[0031] In an embodiment of the present application, the third driving member includes a first driving electric cylinder 42 and a second bracket 43, the first bracket 34 has a frame-type structure, an accommodation space 37 is formed within the first bracket 34, the second bracket 43 is accommodated in the accommodation space 37, the first driving electric cylinder 42 is fixed to the top plate 13, the output shaft of the first driving electric cylinder 42 extends downward, the first bracket 34 and the second bracket 43 are both provided below the first driving electric cylinder 42, the punch 41 is fixed to the bottom of the second bracket 43, the output shaft of the first driving electric cylinder 42 extends downward and penetrates the first bracket 34 and the second bracket 43 in sequence before being connected to the punch 41, and the first driving electric cylinder 42 is operated to drive the punch 41 up and down.

[0032] Furthermore, the third driving member further includes a third guide rod 44, which is fixed to the pressing plate 31 and extends along the direction of gravity. A through hole is provided at a position corresponding to the third guide rod 44 in the first bracket 34, thereby avoiding interference with the lifting and lowering of the third guide rod 44. A third through hole 45 is provided at a position corresponding to the third guide rod 44 in the second bracket 43, a third sleeve 46 is fixed within the third through hole 45, and the third guide rod 44 is gap-engaged within the third sleeve 46, thereby guiding and engaging the second support bracket with the third guide rod 44, thereby enabling the punch 41 to maintain a horizontal state during the downward movement of the punch 41.

[0033] In the embodiment of the present application, the first locking member 51 is fixed to the first bracket 34, the second locking member 52 is fixed to the second bracket 43, and the output shaft of the first driving electric cylinder 42 is provided to pass through the first locking member 51 and the second locking member 52 in order. In a feasible embodiment, both the first locking member 51 and the second locking member 52 adopt pneumatic locking devices, and the structure of the pneumatic locking device can be referred to in the prior art, and the description will be omitted here, as long as the first bracket 34 and the second bracket 43 are locked and unlocked.

[0034] Based on the magnetic powder molding apparatus according to the above embodiment, the present invention further provides a magnetic powder molding method, the magnetic powder molding method comprising: Step S100 of placing the mold 21 at a predetermined height; Step S101: the second driving member is actuated to drive the pressing plate 31 downward until the pressing plate 31 is pressed against the die 21, thereby pressing the die 21; Step S102 in which the third driving member is actuated to drive the punch 41 downward, the punch 41 is actuated to lower to a predetermined height, and the height lock mechanism 50 is actuated to fix the position of the punch 41; Step S103: the first driving member is actuated to drive the die 21 to reciprocate up and down at a set height and speed; Step S104 in which the die 21, the pressing plate 31, and the punch 41 return to their initial positions; and step S105, in which the magnetic powder molded in the mold 21 is removed and the flow is completed.

[0035] This magnetic powder molding method utilizes the reciprocating raising and lowering of a die to maintain a uniform filling density of the magnetic powder and reduce the difference in density distribution in the height direction of the magnetic powder. It also makes it possible to adjust the elevation height of the die and to lock the pressure plate and punch at any desired height.

[0036] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings. However, the above is only a preferred embodiment of the present invention, and the present invention is not limited to the scope of implementation shown in the drawings. Any modifications made to the concept of the present invention or equivalent modifications to equivalent embodiments that are equivalent changes should still fall within the scope of protection of the present invention, provided that they do not exceed the spirit contained in the specification and drawings. [Explanation of symbols]

[0037] 10 Frames 11 Pedestal 12 First guide rod 13 Tabletop 14 Reinforcement plate 20 Mold lifting mechanism 21 Mold 211 Bottom plate 212 1st passage hole 213 First Sleeve 214 Mold body 215 Molding Cavity 216 Connection plate 22 First drive motor 23 Turntable 24 Lola 25 Code Wheel 30 Pressure plate pressing mechanism 31 Pressure plate 32 First driving air cylinder 33 Second guide rod 34 First bracket 35 2nd passage hole 36 Second Sleeve 37 Containment Space 40 Punch forming mechanism 41 Punch 42 First driving electric cylinder 43 Second Bracket 44 3rd guide rod 45 3rd passage hole 46 3rd Sleeve 50 Height lock mechanism 51 First locking member 52 Second locking member

Claims

1. A magnetic powder molding apparatus, The apparatus includes a frame, a die lifting mechanism, a press plate pressing mechanism, a punch forming mechanism, and a height lock mechanism, which are provided on the frame, The die lifting mechanism includes a die and a first drive member for driving the die to move up and down in a reciprocating manner, and a molding cavity is formed at the top of the die; The pressure plate pressing mechanism rises and falls in synchronization with the rise and fall of the mold, and the pressure plate pressing mechanism includes a pressure plate and a second driving member for driving the rise and fall of the pressure plate, and a passage groove is opened in the pressure plate, and the passage groove corresponds to the molding cavity, the punch forming mechanism includes a punch and a third drive member that drives the lifting and lowering of the punch, and the punch is capable of extending into the forming cavity after passing through the passing groove to form a forming engagement; the height locking mechanism includes a first locking member and a second locking member, the first locking member is used to lock the height position of the pressing plate by locking or releasing the pressing plate, and the second locking member is used to lock the height position of the punch by locking or releasing the punch.

2. 2. The magnetic powder molding apparatus of claim 1, wherein the frame includes a base, a first guide rod, and a top plate, the bottom end of the first guide rod being fixed to the base and the top end of the first guide rod being fixedly connected to the top plate.

3. 3. The magnetic powder molding apparatus according to claim 2, wherein the first driving member includes a first driving motor, a rotating plate, and a roller, an end of an output shaft of the first driving motor is connected to the rotating plate, an axis of the rotating plate overlaps with an axis of the output shaft of the first driving motor, the roller is eccentrically provided on a plate surface of the rotating plate, the mold includes a bottom plate, a mold body, and a connecting plate, the mold body is fixed to the bottom plate, the bottom plate is guided and engaged with the first guide rod, and the connecting plate has one end connected to the bottom plate and the other end abuts against the roller.

4. 4. The magnetic powder molding device according to claim 3, further comprising a code wheel provided in a circumferential direction of the rotating disk for measuring a rotation angle of the rotating disk.

5. 4. The magnetic powder molding apparatus according to claim 3, wherein the second driving member includes a first driving air cylinder, a second guide rod, and a first bracket, a bottom end of the second guide rod is connected to the bottom plate, the first bracket is located above the mold, the first driving air cylinder is fixed to a top portion of the first bracket, a piston rod of the first driving air cylinder extends downward, an end of the piston rod of the first driving air cylinder is connected to a top end of the second guide rod, the pressing plate is fixed to the bottom portion of the first bracket, and the pressing plate is guided and engaged with the second guide rod.

6. The magnetic powder molding device according to claim 5, wherein there are two of the first driving air cylinders and two of the second guide rods, the two first driving air cylinders and the two second guide rods are arranged in parallel at a distance from each other, and the position of the first driving air cylinder corresponds to the position of the second guide rod.

7. 6. The magnetic powder molding device according to claim 5, wherein the third driving member includes a first driving electric cylinder and a second bracket, an accommodation space is formed within the first bracket, the second bracket is accommodated within the accommodation space, the first driving electric cylinder is fixed to the top plate, the punch is fixed to a bottom portion of the second bracket, and an output shaft of the first driving electric cylinder extends downward and passes through the first bracket and the second bracket in sequence before being connected to the punch.

8. 8. The magnetic powder molding apparatus according to claim 7, wherein the third driving member further includes a third guide rod, the third guide rod being fixed to the pressing plate, and the second bracket being guided and engaged with the third guide rod.

9. 8. The magnetic powder molding device according to claim 7, wherein the first locking member is fixed to the first bracket, the second locking member is fixed to the second bracket, and an output shaft of the first driving electric cylinder is provided so as to pass through the first locking member and the second locking member in that order.

10. A magnetic powder molding method for molding magnetic powder using the magnetic powder molding device according to any one of claims 1 to 9, comprising the steps of: Step S100 of placing the mold at a predetermined height; Step S101 in which the second driving member is actuated to drive the pressing plate downward until the pressing plate is pressed against the die, thereby pressing the die; Step S102 in which the third driving member is actuated to drive the punch downward, the punch is actuated to a predetermined height, and the height lock mechanism is actuated to fix the position of the punch; Step S103: the first driving member is operated to drive the die to reciprocate up and down at a set height and speed; Step S104 in which the die, the pressing plate, and the punch return to their initial positions; and step S105, in which the magnetic powder molded in the die is removed and the flow is completed.

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