A vacuum forming apparatus for magnetic powder

Abstract

The utility model provides a kind of vacuum forming equipment for magnetic powder, belong to magnetic powder forming technical field. Including box, the side of box is equipped with operating mouth, and is equipped with sealing plate at operating mouth, box bottom is equipped with the vacuum pump for vacuumizing, gas pipe is connected on box, relief valve is equipped on gas pipe, die is arranged in box, the cavity for filling magnetic powder is opened in die, vertically sliding setting is equipped with the pressure head for being worn into cavity and pressing magnetic powder above die, first driving part for driving pressure head to move is equipped on box, orientation component is also equipped in box, orientation component includes two electromagnets respectively arranged in the both sides of die, the polarity of one end of two electromagnets close to die is opposite to make the magnetic field direction between them consistent. It has the effect of improving the uniformity of magnetic block magnetism.

Description

Technical Field

[0001] This utility model relates to the field of magnetic powder forming technology, and in particular to a vacuum forming equipment for magnetic powder. Background Technology

[0002] Magnetic powder is a type of hard magnetic single-domain particle that is often used to manufacture magnetic blocks with strong and uniform magnetism.

[0003] The traditional production method involves pouring magnetic powder into a mold, then applying an external magnetic field to orient the powder so that the north and south poles of these disordered magnetic powder particles turn in the same direction. The powder is then pressed into a block and finally sintered.

[0004] However, during the orientation process, the magnetic powder's alignment is hindered in the atmosphere, resulting in poor powder flowability. This can cause some powder to fail to align properly under the influence of a magnetic field. When these magnetic powders with inconsistent north and south pole orientations are pressed into blocks, the resulting magnetic blocks will suffer from insufficient magnetic uniformity. Utility Model Content

[0005] In view of the above problems, this utility model provides a vacuum forming equipment for magnetic powder.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A vacuum forming device for magnetic powder is provided, comprising a housing, an operating port on one side of the housing with a sealing plate at the operating port, a vacuum pump for vacuuming at the bottom of the housing, an air pipe connected to the housing with a pressure relief valve, a mold inside the housing with a cavity for filling magnetic powder, a pressure head vertically sliding above the mold for penetrating the cavity and pressing the magnetic powder, a first driving component for moving the pressure head on the housing, and an orientation component inside the housing, comprising two electromagnets respectively disposed on both sides of the mold, the ends of the two electromagnets near the mold having opposite polarities to ensure that the magnetic field directions between them are aligned.

[0008] Furthermore, a guide pipe for injecting magnetic powder is provided on one side of the mold, and a guide channel for connecting the guide pipe and the cavity is opened on the side wall of the mold. The height of the discharge end of the guide channel from the bottom wall of the cavity is greater than the filling height of the magnetic powder in the cavity. The inlet end of the guide pipe extends out of the box and is connected to a hopper. A first valve is provided on the guide pipe, and a quantitative filling mechanism for quantitatively filling magnetic powder into the hopper is provided on the outside of the box.

[0009] Furthermore, the quantitative filling mechanism includes a mounting frame, a magnetic powder tank, and a weighing pan. The mounting frame is located on the outside of the box. The magnetic powder tank is connected to the top of the mounting frame via the weighing pan so that the weighing pan can weigh the amount of magnetic powder in the magnetic powder tank. The bottom of the magnetic powder tank is provided with a discharge pipe, which is located above the hopper. A second valve is provided on the discharge pipe.

[0010] Furthermore, the box is equipped with a material-retrieving mechanism for removing the magnetic block. The material-retrieving mechanism includes a top plate and a push plate. An installation groove with a size adapted to the top plate is opened on the bottom wall of the cavity. The box is equipped with a second driving member for driving the top plate to move vertically upward to push out the magnetic block. A discharge port is opened on one side of the box, and a cover plate is provided at the discharge port. The push plate is horizontally and linearly slidably arranged in the box to cooperate with the top plate to push the magnetic block out of the discharge port. The box is equipped with a third driving member for driving the push plate to move. A receiving groove is also provided on the outer wall of the box at the discharge port.

[0011] Furthermore, a groove is provided on the outer wall of the box at the discharge port, and the cover plate is rotatably installed in the groove. The rotating shaft of the cover plate is located on the top wall of the groove, and a sealing gasket is provided on the inner wall of the groove for pressing and contacting the cover plate under vacuum conditions.

[0012] Furthermore, the push plate is equipped with a push rod for pushing open the cover plate and opening the discharge port when the magnetic block is discharged.

[0013] Furthermore, two sleeves coaxial with the electromagnets are provided on the inner walls of both sides of the housing. The two electromagnets are slidably connected coaxially in the sleeves to adjust the distance between the two electromagnets. The sleeves are provided with limiting components to restrict the sliding of the corresponding electromagnets. The limiting components include limiting bolts, which are threadedly connected to the side wall of the sleeves, and one end of the limiting bolts passes into the sleeves and moves against the outer wall of the corresponding electromagnet.

[0014] The beneficial effects of this utility model are as follows: After opening the sealing plate, the magnetic powder is poured into the cavity, then the sealing plate is closed and the vacuum pump is started to evacuate the inside of the box; then, the electromagnets on both sides are energized, so that the magnetic powder in the mold is in a uniform magnetic field, so that the north and south poles of the magnetic powder can be aligned in a vacuum state; finally, the pressure head is moved down to press the magnetic powder into shape, which has the effect of improving the uniformity of the magnetic block. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a vacuum forming equipment for magnetic powder according to an embodiment of this application.

[0016] Figure 2 This is a schematic diagram of the internal structure of a vacuum forming device for magnetic powder according to an embodiment of this application.

[0017] Figure 3 This is a cross-sectional structural diagram of the housing and mold of a vacuum forming equipment for magnetic powder according to an embodiment of this application.

[0018] Figure 4 This is a schematic diagram of the structure of a vacuum forming apparatus for magnetic powder according to an embodiment of this application.

[0019] Figure 5 This is a schematic diagram of the discharge state of a vacuum forming device for magnetic powder according to an embodiment of this application.

[0020] Figure 6 This is a schematic diagram of the push plate and push rod of a vacuum forming equipment for magnetic powder according to an embodiment of this application.

[0021] The components include: 1. Box body; 11. Sealing plate; 12. Cover plate; 13. Material receiving groove; 14. Sleeve; 2. Vacuum pump; 3. Air pipe; 31. Pressure relief valve; 4. Mold; 41. Cavity; 42. Material guide channel; 5. Press head; 51. First driving component; 6. Electromagnet; 7. Material guide pipe; 71. Hopper; 72. First valve; 8. Quantitative filling mechanism; 81. Mounting frame; 82. Magnetic powder tank; 821. Discharge pipe; 822. Second valve; 83. Weighing pan; 831. Tray; 832. Weighing sensor; 9. Material handling mechanism; 91. Top plate; 911. Second driving component; 92. Push plate; 921. Third driving component; 93. Push rod; 10. Sealing gasket; 20. Limit bolt. Detailed Implementation

[0022] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0023] This application discloses a vacuum forming apparatus for magnetic powder, referring to... Figure 1 , Figure 2 and Figure 3 The system includes a housing 1, with an operating port on one side and a sealing plate 11 at the operating port. A vacuum pump 2 for vacuuming is located at the bottom of the housing 1, and an air pipe 3 is connected to the housing 1, with a pressure relief valve 31 on the air pipe 3. A mold 4 is located inside the housing 1, with a cavity 41 for filling magnetic powder. A pressure head 5 is vertically slidably mounted above the mold 4, penetrating the cavity 41 and pressing the magnetic powder. A first driving component 51 is located on the housing 1 to move the pressure head 5. An orientation component is also located inside the housing 1, comprising two electromagnets 6 respectively positioned on either side of the mold 4. The ends of the two electromagnets 6 closest to the mold 4 have opposite polarities to ensure that the magnetic field directions between them are aligned.

[0024] In this embodiment, the sealing plate 11 is opened, magnetic powder is poured into the cavity 41, the sealing plate 11 is then closed, and the vacuum pump 2 is started to evacuate the inside of the housing 1. Next, the electromagnets 6 on both sides are energized, placing the magnetic powder in the mold 4 in a uniform magnetic field, ensuring that the north and south poles of the magnetic powder align consistently under vacuum. Finally, the pressure head 5 is lowered to press the magnetic powder into shape. After the magnetic block is pressed, the pressure relief valve 31 is opened to release pressure, and then the sealing plate 11 is opened to remove the magnetic block. This vacuum forming equipment for magnetic powder allows the magnetic powder to be oriented under vacuum, improving the consistency of the north and south pole alignment, and then pressing it into a block, thus improving the magnetic uniformity of the magnetic block.

[0025] Specifically, one side of the sealing plate 11 is rotatably disposed on one side of the operating port, and the other side of the sealing plate 11 is provided with a magnet for magnetic connection with the housing 1.

[0026] In this embodiment of the application, the first driving member 51 includes a first driving cylinder, which is disposed on the top of the housing 1. The piston rod of the first driving cylinder extends vertically downward into the housing 1 and is connected to the pressure head 5.

[0027] Furthermore, a guide pipe 7 for injecting magnetic powder is provided on one side of the mold 4. A guide channel 42 for connecting the guide pipe 7 and the cavity 41 is provided on the side wall of the mold 4. The height of the discharge end of the guide channel 42 from the bottom wall of the cavity 41 is greater than the filling height of the magnetic powder in the cavity 41. The inlet end of the guide pipe 7 extends out of the box 1 and is connected to a hopper 71. A first valve 72 is provided on the guide pipe 7. A quantitative filling mechanism 8 for quantitatively filling magnetic powder into the hopper 71 is provided on the outside of the box 1.

[0028] In this embodiment, magnetic powder can be quantitatively injected into the hopper 71 by the quantitative filling mechanism 8. The magnetic powder enters the cavity 41 along the guide pipe 7 and the guide channel 42. Then, the first valve 72 is closed, and the vacuum pump 2 can be started for orientation and pressing.

[0029] Furthermore, the quantitative filling mechanism 8 includes a mounting frame 81, a magnetic powder tank 82, and a weighing pan 83. The mounting frame 81 is located on the outside of the housing 1. The magnetic powder tank 82 is connected to the top of the mounting frame 81 via the weighing pan 83 so that the weighing pan 83 can weigh the amount of magnetic powder in the magnetic powder tank 82. A discharge pipe 821 is provided at the bottom of the magnetic powder tank 82, which is located above the hopper 71. A second valve 822 is provided on the discharge pipe 821.

[0030] In this embodiment, the weight of the magnetic powder in the magnetic powder tank 82 can be measured by the weighing pan 83, and the housing 1 is equipped with a display for showing the weight of the weighing pan 83. During the filling process, the amount of magnetic powder filled in the magnetic powder tank 82 can be quantitatively controlled by the second valve 822 according to the amount required for pressing the magnetic blocks.

[0031] Reference Figure 4 The weighing pan 83 includes a tray 831 and a weighing sensor 832. The weighing sensor 832 is mounted on a mounting bracket 81, and the tray 831 is mounted on the weighing sensor 832. The magnetic powder canister 82 is mounted on the tray 831, allowing for weighing via the weighing sensor 832. The weighing sensor 832 is functionally connected to a computer control system, which is also functionally connected to a second valve 822. During each filling process, when the weighing sensor 832 detects a decrease in the amount of magnetic powder in the magnetic powder canister 82 that reaches the amount required for pressing the magnetic blocks, the computer control system controls the second valve 822 to close. After filling is complete, the first valve 72 is closed, and the orientation and pressing operations can begin.

[0032] Reference Figure 5 and Figure 6 The housing 1 is equipped with a material-retrieving mechanism 9 for removing the magnetic block. The material-retrieving mechanism 9 includes a top plate 91 and a push plate 92. A mounting groove with a size adapted to the top plate 91 is provided on the bottom wall of the cavity 41. A second driving member 911 is provided on the housing 1 to drive the top plate 91 vertically upward to eject the magnetic block. A discharge port is provided on one side of the housing 1, and a cover plate 12 is provided at the discharge port. The push plate 92 is horizontally and linearly slidably mounted on the housing 1 to cooperate with the top plate 91 to push the magnetic block out of the discharge port. A third driving member 921 is provided on the housing 1 to drive the push plate 92 to move. A receiving groove 13 is also provided on the outer wall of the housing 1 at the discharge port.

[0033] In this embodiment of the application, after the magnetic block is pressed and formed, the pressure relief valve 31 is opened to release the pressure. Then the pressure head 5 moves upward to open the cavity 41. Next, the top plate 91 moves upward to push the magnetic block out of the cavity 41. The cover plate 12 is opened, and the magnetic block on the top plate 91 is pushed out of the discharge port and falls onto the receiving groove 13 by the horizontal movement of the push plate 92.

[0034] In this embodiment, the second driving component 911 includes a second driving cylinder, which is disposed at the bottom of the housing 1. The piston rod of the second driving cylinder extends vertically upward into the mold 4 and is connected to the top plate 91. The third driving component 921 includes a linear screw module, which is horizontally disposed on the inner wall of the housing 1 to drive the push plate 92 to move horizontally and linearly.

[0035] Furthermore, a groove is provided on the outer wall of the box 1 at the discharge port, and the cover plate 12 is rotatably disposed in the groove. The rotating shaft of the cover plate 12 is disposed on the top wall of the groove, and a sealing gasket 10 is provided on the inner wall of the groove for pressing and contacting the cover plate 12 under vacuum conditions.

[0036] In this embodiment, when the vacuum pump 2 is started and vacuuming is performed, the cover plate 12 can press against the sealing gasket 10, further improving the sealing effect of the cover plate 12 on the housing 1. After the magnetic block is pressed, the pressure relief valve 31 is opened, the air pressure inside the housing 1 is restored, and the cover plate 12 can be easily opened.

[0037] Furthermore, the push plate 92 is provided with a push rod 93 for pushing open the cover plate 12 and opening the discharge port when the magnetic block is discharged.

[0038] In this embodiment, after the pressure inside the housing 1 is released, when the push plate 92 moves and contacts the magnetic block, the push rod 93 can push open the cover plate 12 and open the discharge port so that the magnetic block can be discharged from the discharge port.

[0039] Furthermore, two sleeves 14, coaxial with the electromagnets 6, are provided on the inner walls of both sides of the housing 1. The two electromagnets 6 are slidably connected coaxially within the sleeves 14 to adjust the distance between the two electromagnets 6. The sleeves 14 are provided with limiting members to restrict the sliding of the corresponding electromagnets 6. The limiting members include limiting bolts 20, which are threaded onto the side wall of the sleeves 14, and one end of the limiting bolts 20 passes into the sleeves 14 and movably abuts against the outer wall of the corresponding electromagnet 6.

[0040] The electromagnet 6 includes an iron core and a conductive coil wound on the outer wall of the iron core. Moving the two electromagnets 6 can adjust the distance between them, thereby adjusting the strength of the magnetic field.

[0041] The implementation principle of a vacuum forming device for magnetic powder according to an embodiment of this application is as follows: The sealing plate 11 is opened, and magnetic powder is poured into the mold cavity 41. Then, the sealing plate 11 is closed, and the vacuum pump 2 is started to create a vacuum inside the housing 1. Next, the electromagnets 6 on both sides are energized, placing the magnetic powder inside the mold 4 in a uniform magnetic field, ensuring that the north and south poles of the magnetic powder align consistently under vacuum. Finally, the pressure head 5 is lowered to press the magnetic powder into shape. Orienting the magnetic powder under vacuum improves the consistency of the north and south pole alignment, allowing it to be pressed into a block, thus improving the magnetic uniformity of the block.

[0042] Those skilled in the art will understand that although preferred embodiments of the present invention have been described, those skilled in the art, once they understand the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention. Clearly, those skilled in the art can make various alterations and modifications to the present invention without departing from its spirit and scope. Thus, if these modifications and modifications of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include these modifications and modifications.

Claims

1. A vacuum forming apparatus for magnetic powders, characterized by: The device includes a housing (1), with an operating port on one side and a sealing plate (11) at the operating port. A vacuum pump (2) for vacuuming is provided at the bottom of the housing (1). An air pipe (3) is connected to the housing (1) and a pressure relief valve (31) is provided on the air pipe (3). A mold (4) is provided inside the housing (1). A cavity (41) for filling magnetic powder is opened on the mold (4). A pressure head (5) for penetrating into the cavity (41) and pressing the magnetic powder is vertically slidably provided above the mold (4). A first driving member (51) for driving the pressure head (5) to move is provided on the housing (1). An orientation component is also provided inside the housing (1). The orientation component includes two electromagnets (6) respectively arranged on both sides of the mold (4). The two electromagnets (6) have opposite polarities at the ends near the mold (4) so ​​that the magnetic field directions between them are consistent.

2. The vacuum forming apparatus for magnetic powders according to claim 1, characterized by: A guide tube (7) for injecting magnetic powder is provided on one side of the mold (4). A guide channel (42) for connecting the guide tube (7) and the cavity (41) is provided on the side wall of the mold (4). The height of the discharge end of the guide channel (42) from the bottom wall of the cavity (41) is greater than the filling height of the magnetic powder in the cavity (41). The feed end of the guide tube (7) extends out of the box (1) and is connected to the hopper (71). A first valve (72) is provided on the guide tube (7). A quantitative filling mechanism (8) for quantitatively filling magnetic powder into the hopper (71) is provided on the outside of the box (1).

3. The vacuum forming apparatus for magnetic powders according to claim 2, characterized in that: The quantitative filling mechanism (8) includes a mounting frame (81), a magnetic powder tank (82), and a weighing pan (83). The mounting frame (81) is located outside the box (1). The magnetic powder tank (82) is connected to the top of the mounting frame (81) via the weighing pan (83) so that the weighing pan (83) can weigh the amount of magnetic powder in the magnetic powder tank (82). The bottom of the magnetic powder tank (82) is provided with a discharge pipe (821). The discharge pipe (821) is located above the hopper (71). A second valve (822) is provided on the discharge pipe (821).

4. The vacuum forming apparatus for magnetic powders according to claim 1, characterized by: The housing (1) is provided with a material picking mechanism (9) for taking out the magnetic block. The material picking mechanism (9) includes a top plate (91) and a push plate (92). The bottom wall of the cavity (41) is provided with an installation groove of a size that matches the top plate (91). The housing (1) is provided with a second driving member (911) for driving the top plate (91) to move vertically upward to push out the magnetic block. A discharge port is provided on one side of the housing (1), and a cover plate (12) is provided at the discharge port. The push plate (92) is horizontally and linearly slidably arranged in the housing (1) to cooperate with the top plate (91) to push the magnetic block out of the discharge port. The housing (1) is provided with a third driving member (921) for driving the push plate (92) to move. A receiving groove (13) is also provided on the outer wall of the housing (1) at the discharge port.

5. The vacuum forming apparatus for magnetic powders according to claim 4, characterized in that: The outer wall of the box (1) has a groove at the discharge port. The cover plate (12) is rotatably disposed in the groove. The rotating shaft of the cover plate (12) is disposed on the top wall of the groove. The inner wall of the groove is provided with a sealing gasket (10) for pressing and contacting the cover plate (12) under vacuum conditions.

6. The vacuum forming apparatus for magnetic powders according to claim 5, characterized in that: The push plate (92) is provided with a push rod (93) for opening the cover plate (12) and opening the discharge port when the magnetic block is discharged.

7. The vacuum forming apparatus for magnetic powders according to claim 1, characterized by: The inner walls of both sides of the housing (1) are provided with two sleeves (14) coaxial with the electromagnet (6). The two electromagnets (6) are slidably connected coaxially in the sleeves (14) to adjust the distance between the two electromagnets (6). The sleeves (14) are provided with limiting members for restricting the sliding of the corresponding electromagnets (6). The limiting members include limiting bolts (20). The limiting bolts (20) are threadedly connected to the side wall of the sleeves (14), and one end of the limiting bolts (20) passes into the sleeves (14) and moves against the outer wall of the corresponding electromagnet (6).

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