Preparation process of manganese-zinc soft magnetic ferrite powder for automotive electronics

Abstract

The present invention relates to the technical field of soft magnetic ferrite preparation, and discloses a preparation process for manganese-zinc soft magnetic ferrite powder for automotive electronics, including S1. raw material grinding, S2. material mixing, S3. sampling inspection of the mixture, S4. pre-sintering, and S5. powder granulation. Through the design of the material control mechanism, during the stirring process, the connection end between the first swing rod and the second swing rod always faces the position of the through groove. Therefore, when feeding, the mixing frame is rotated so that the through groove faces downward. Subsequently, during the rotation of the round rod, the discharge of raw materials through the through groove can be accelerated. Further controlling the rotation of the bidirectional threaded rod, the ends of the first swing rod and the second swing rod push against the contact rod. In cooperation with the elastic force of the spring, the stirring main rod is shaken at the position of the through groove, and the raw materials remaining on the stirring main rod itself can be shaken off, achieving the purpose of full discharge. Secondly, through the design of the sampling mechanism, it is also beneficial for users to more directly grasp the mixing situation.

Description

Technical Field

[0001] The invention relates to the technical field of soft ferrite preparation, in particular to a preparation process of manganese-zinc soft ferrite powder for automotive electronics. Background Art

[0002] Soft ferrite, as the name suggests, is a magnetic material. Its application feature is "magnetic conductivity". Just like metals are conductive, some materials are magnetic, which we call magnetic materials. Magnetic materials are divided into hard magnetic and soft magnetic. The difference between soft magnets and hard magnetic materials is that soft magnets themselves are not magnetic. Only when an external energized solenoid is applied, a magnetic field is generated. When the external current is removed, the magnetic field no longer exists. Manganese-zinc ferrite is a soft magnetic material with very good electrical, magnetic and optical properties. When making automotive electronic devices, adding manganese-zinc soft ferrite materials can effectively reduce electromagnetic interference and energy loss.

[0003] The Chinese patent application with announcement number CN218854140U proposes a raw material mixing device for the production of soft magnetic manganese-zinc ferrite powder. The surface shape of the raw material for producing the soft magnetic manganese-zinc ferrite powder is first optimized and screened through grinding by a grinding mechanism, and then introduced into a mixing mechanism for mixing through a feeding mechanism. This solves the problem in the prior art that when the raw materials for the soft magnetic manganese-zinc ferrite powder are mixed by dry method, the particle shape of the raw materials is not further optimized and screened, resulting in poor quality of the finished product.

[0004] In the process of preparing manganese-zinc soft ferrite powder, it is often necessary to mix the raw materials with good proportions. The above device realizes mixing after further optimizing and screening the particle shape. The mixing steps are similar to the existing mixing process. After mixing, it is discharged and enters the next process. However, during the mixing process, if there is water in the mixture, the presence of water will cause the viscosity of the mixture to increase. Accordingly, when feeding, it is easy for the material to adhere to the inside of the mixing device and cannot fall quickly. If the adhered mixed material is not discharged in time, the discharged material will be less than the set amount, which will affect the subsequent processing accuracy. At the same time, the material adhered to the mixing device will also cause pressure on the subsequent cleaning work. Summary of the invention

[0005] In order to solve the above-mentioned problems, the present invention provides a preparation process of manganese-zinc soft ferrite powder for automotive electronics.

[0006] The present invention provides a preparation process of a manganese-zinc soft ferrite powder for automotive electronics using the following technical scheme:

[0007] A preparation process of manganese-zinc soft ferrite powder for automotive electronics comprises the following steps:

[0008] S1. Grind the raw materials. Grind the raw materials of iron oxide, zinc oxide and manganese oxide respectively, and weigh them according to the proportion after grinding.

[0009] S2. Mix the materials. Put the proportioned raw materials into the mixing device in sequence to mix the ingredients, and at the same time put fine camphor powder with a proportion of 3-5%.

[0010] S3. Sampling inspection of the mixed materials. During the mixing process, sample the mixed materials at different positions in the interior of the mixing device. After sampling, it is provided for the staff to judge the overall mixing situation, and dry it after mixing well.

[0011] S4. Pre-sintering. Pre-sinter the mixed dried materials, and set the temperature between 850-980 °C during sintering.

[0012] S5. Granulation of the powder. Use a ball milling device to ball mill and crush the sintered materials, and use a spray granulation device to granulate the powder after crushing.

[0013] The mixing device in step S2 and step S3 includes a bottom plate, a main body plate is fixedly connected to the top of the bottom plate, a mixing frame is arranged inside the main body plate, and a material control mechanism is arranged on the mixing frame.

[0014] The material control mechanism includes two support plates which are respectively fixedly connected to the two side walls of the mixing frame. Connecting rods are fixedly connected to both support plates. The two connecting rods respectively penetrate through the two side walls of the main body plate and are rotatably connected to the main body plate. A through groove is formed at the top of the mixing frame. A round rod is rotatably connected inside the mixing frame. The round rod extends outside the mixing frame. A cavity is formed in the round rod. A main stirring rod is arranged outside the round rod. The outer side of the main stirring rod is in contact with the inner cavity wall of the mixing frame. A positioning rod is fixedly connected to the outside of the round rod. The positioning rod extends into the main stirring rod and is slidably connected to the main stirring rod. A spring is fixedly connected to the positioning rod. The spring is fixedly connected inside the main stirring rod. A retaining strip is fixedly connected to the inner side of the main stirring rod. The retaining strips are arranged at equal intervals on the inner side of the main stirring rod. A mounting plate is rotatably connected inside the round rod. An auxiliary plate is fixedly connected to one side wall of the mixing frame. The mounting plate extends outside the round rod. One side of the auxiliary plate is fixedly connected to the inner side of the auxiliary plate. A bidirectional threaded rod is rotatably connected to the inner side of the mounting plate. Two moving blocks are slidably connected inside the mounting plate. The bidirectional threaded rod sequentially penetrates through the two moving blocks, and the bidirectional threaded rod is threadedly connected to the moving blocks. One of the moving blocks is movably connected to a first swing rod through a movable hinge seat. The other moving block is movably connected to a second swing rod through a movable hinge seat. One end of the first swing rod extends into the second swing rod, and the first swing rod and the second swing rod are connected by a rotating shaft. A contact rod is fixedly connected to the inner side of the main stirring rod.

[0015] By adopting the above technical solution, when mixing various raw materials, the raw materials are conveyed into the mixing frame through the opening at the top of the mixing frame. Finally, the round rod is controlled to rotate. After the round rod drives the main stirring rod to rotate, the purpose of mixing and stirring the raw materials inside the mixing frame can be achieved. During the stirring process, the connecting end between the first swing rod and the second swing rod always faces the position of the through groove. Therefore, when feeding, the mixing frame is controlled to rotate so that the through groove faces downward. Subsequently, during the rotation of the round rod, the discharge of the raw materials through the through groove can be accelerated. By further controlling the rotation of the bidirectional threaded rod, the ends of the first swing rod and the second swing rod push against the contact rod. With the elastic force of the spring, the main stirring rod shakes at the position of the through groove, and the raw materials remaining on the main stirring rod itself can be shaken off, achieving the purpose of full discharge.

[0016] Preferably, the bidirectional threaded rod extends outside the round rod. One end of the bidirectional threaded rod is rotatably connected to the inner side of the auxiliary plate. A circular baffle is rotatably connected inside the round rod. The mounting plate penetrates through the circular baffle. The bidirectional threaded rod penetrates through the circular baffle and is rotatably connected to the circular baffle. A first motor is fixedly connected to one side of the auxiliary plate. The first motor is fixedly connected to one end of the bidirectional threaded rod through an output shaft.

[0017] By adopting the above technical solution, the circular baffle can prevent the mixture in the mixing box from being discharged outside the mixing chamber through the cavity.

[0018] Preferably, a U-shaped plate is fixedly connected to one side wall of the mixing box. One end of the round rod is rotatably connected to the inner side of the U-shaped plate. A second motor is fixedly connected to one side of the U-shaped plate. The second motor is fixedly connected with a first gear through an output shaft. A second gear is fixedly connected to the outside of the round rod. The first gear meshes with the second gear.

[0019] By adopting the above technical solution, the first gear drives the second gear to rotate after rotation.

[0020] Preferably, a third gear is fixedly connected to the outside of one of the connecting rods. A lifting plate is slidably connected to one side wall of the support plate. A first rack is fixedly connected to the lifting plate. The first rack is arranged at the rear side of the third gear and meshes with the third gear. A square plate is fixedly connected to one side wall of the support plate. A first electric push rod is fixedly connected to the bottom of the square plate. One end of the first electric push rod is fixedly connected to the top of the lifting plate.

[0021] By adopting the above technical solution, the first electric push rod can push and pull the lifting plate up and down after working.

[0022] Preferably, track plates are fixedly connected to both side walls of the mixing box. A cover plate is slidably connected between the two track plates. The cover plate is in contact with the outer surface of the mixing box. A frame plate is arranged outside the mixing box. Both ends of the frame plate are respectively fixedly connected to the two track plates.

[0023] By adopting the above technical solution, after the cover plate moves to the outside of the through groove, it shields and seals the through groove part.

[0024] Preferably, a transmission rod is rotatably connected to the inner side of the frame plate. A third motor is fixedly connected to one side wall of the frame plate. The third motor is fixedly connected with one end of the transmission rod through an output shaft. Two fourth gears are fixedly connected to the outside of the transmission rod. Two second racks are fixedly connected to the cover plate. The two second racks respectively mesh with the two fourth gears.

[0025] By adopting the above technical solution, the second rack drives the fourth gear to rotate after moving.

[0026] Preferably, a sampling mechanism is provided at the bottom of the mixing frame. The sampling mechanism includes a placement seat fixedly connected to the bottom of the mixing frame. A sampling plate is provided at the bottom of the mixing frame. The sampling plate penetrates through the placement seat and matches the placement seat. Sampling grooves are formed on the sampling plate and communicate with the mixing frame. A cross plate is fixedly connected between adjacent sampling plates. A vertical plate is fixedly connected to the mixing frame. A connecting plate is provided on one side of the vertical plate. The connecting plate penetrates through the vertical plate, and both ends of the connecting plate are fixedly connected to the cross plate. A second electric push rod is fixedly connected to one side wall of the connecting plate, and one end of the second electric push rod is fixedly connected to one side of the vertical plate.

[0027] By adopting the above technical solution, the telescopic movement of the second electric push rod drives the connecting plate to move.

[0028] Preferably, a feeding mechanism is provided at the top of the main body plate. The feeding mechanism includes a feeding hopper that penetrates through the top wall of the main body plate and is slidably connected to the main body plate. An L-shaped plate is fixedly connected to the front side of the main body plate. A control block is slidably connected inside the L-shaped plate. The top of the control block is movably connected to a push-pull rod through a movable hinge seat. One end of the push-pull rod is movably connected to one side wall of the feeding hopper through a movable hinge seat.

[0029] By adopting the above technical solution, the movement of the control block drives the push-pull rod to flip, and after the push-pull rod flips, it pushes the feeding hopper.

[0030] Preferably, a third electric push rod is fixedly connected to one side wall of the L-shaped plate, and one end of the third electric push rod is fixedly connected to one side of the control block.

[0031] By adopting the above technical solution, after the third electric push rod works, it pushes and pulls the control block.

[0032] In summary, the present invention includes the following beneficial technical effects:

[0033] Through the design of the material control mechanism of the present invention, during the stirring process, the connection end between the first swing rod and the second swing rod always faces the position of the through groove. Therefore, when feeding, the mixing frame is rotated so that the through groove faces downward, and then during the rotation of the round rod, the discharge of the raw materials through the through groove can be accelerated. Further controlling the rotation of the bidirectional threaded rod, the ends of the first swing rod and the second swing rod push against the contact rod, and in cooperation with the elastic force of the spring, the stirring main rod shakes at the position of the through groove, and the raw materials remaining on the stirring main rod itself can be shaken off, achieving the purpose of full discharge of materials.

[0034] Through the design of the sampling mechanism, during the mixing and stirring process, when the sampling tank is controlled to be within the placement frame, the mixed material falls into the sampling tank. After the sampling tank is controlled to leave the placement frame, the user can inspect the mixed material in the sampling tank, which is conducive to the user more directly grasping the mixing situation. Moreover, the mixed materials in different sampling tanks further reflect the mixing conditions in different regions inside the mixing frame, avoiding the situation of insufficiently uniform mixing. Compared with traditional mixing, where it is impossible for manual labor to properly understand the internal mixing situation, it is more conducive to intuitively grasping the mixing process.

[0035] In the mixing and stirring operation of the present invention, the round rod drives the main stirring rod to rotate. After the main stirring rod rotates, it shovels up the raw materials inside the mixing frame. After the raw materials are shoveled up and fall from a high place, the blocking strips inside the main stirring rod will block the raw materials when they fall, prompting the raw materials to fall through the gaps between adjacent blocking strips, so as to conduct subdivision and shaking. After shaking, it continues to stir and shovel up repeatedly, and the purpose of rapid mixing of various raw materials can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic diagram of the structure of the present invention;

[0037] Figure 2 is a side view structural diagram of the present invention;

[0038] Figure 3 is Figure 2 the enlarged view at A in

[0039] Figure 4 is a schematic diagram of the structure of the lifting plate in the present invention;

[0040] Figure 5 is a sectional view structural diagram of the mixing frame in the present invention;

[0041] Figure 6 is Figure 5 the enlarged view at B in

[0042] Figure 7 is a top view of the mixing frame in the present invention;

[0043] Figure 8 is a sectional view of the structure of the sampling plate in the present invention;

[0044] Figure 9 is a schematic diagram of the structure of the round rod in the present invention;

[0045] Figure 10 is a sectional view of the structure of the main stirring rod in the present invention;

[0046] Figure 11 is Figure 10 the enlarged view at C in

[0047] Figure 12 isFigure 10 Enlarged view at position D in

[0048] Figure 13 Cross-sectional structure diagram of the mounting plate in the present invention;

[0049] Figure 14 Schematic diagram of the preparation process of the present invention.

[0050] Explanation of reference numerals in the drawings: 1, bottom plate; 2, main body plate; 3, mixing frame; 4, material control mechanism; 41, support plate; 42, connecting rod; 43, through groove; 44, round rod; 45, cavity; 46, main stirring rod; 47, positioning rod; 48, spring; 49, stop bar; 491, mounting plate; 492, auxiliary plate; 493, bidirectional threaded rod; 494, moving block; 495, first swing rod; 496, second swing rod; 497, contact rod; 498, circular baffle; 499, first motor; 481, U-shaped plate; 482, second motor; 483, first gear; 484, second gear; 485, third gear; 486, lifting plate; 487, first rack; 488, first electric push rod; 489, track plate; 471, cover plate; 472, frame plate; 473, transmission rod; 474, third motor; 475, fourth gear; 476, second rack; 5, sampling mechanism; 51, placing seat; 52, sampling plate; 53, sampling groove; 54, cross plate; 55, vertical plate; 56, connecting plate; 57, second electric push rod; 6, feeding mechanism; 61, feed hopper; 62, L-shaped plate; 63, control block; 64, push-pull rod; 65, third electric push rod. Detailed implementation manners

[0051] The following is a further detailed description of the present invention in conjunction with the attached Figure 1 - attached Figure 14 drawings.

[0052] The present invention discloses a preparation process for manganese-zinc soft magnetic ferrite powder used in automotive electronics. Referring to Figures 1-13 , it includes the following steps:

[0053] S1. Raw material grinding: Grind the raw materials of iron oxide, zinc oxide, and manganese oxide respectively, and weigh them according to the proportion after grinding;

[0054] S2. Material mixing: Put the proportioned raw materials into the mixing device in sequence to mix the ingredients, and at the same time put fine camphor powder with a proportion of 3-5%. The fine camphor powder is used as a magnet sintering agent here, playing a role of bonding, lubricating, and stabilizing;

[0055] S3. Sampling inspection of the mixture: During the mixing process, take samples of the mixture at different positions in different regions inside the mixing device, and after sampling, it is provided for the staff to judge the overall mixing situation, and dry it after mixing well;

[0056] S4. Pre-sintering, pre-sinter the dried materials after mixing, and set the temperature between 850 °C and 980 °C during sintering;

[0057] S5. Powder granulation, use a ball milling device to ball mill and crush the sintered materials, and use a spray granulation device for powder granulation after crushing;

[0058] The mixing device in step S2 and step S3 includes a bottom plate 1, a main body plate 2 is fixedly connected to the top of the bottom plate 1, a mixing frame 3 is arranged inside the main body plate 2, and a material control mechanism 4 is arranged on the mixing frame 3;

[0059] The material control mechanism 4 includes two support plates 41, the two support plates 41 are respectively fixedly connected to the two side walls of the mixing frame 3, connecting rods 42 are fixedly connected to both of the two support plates 41, the two connecting rods 42 respectively penetrate through the two side walls of the main body plate 2 and are rotatably connected to the main body plate 2, a through groove 43 is opened at the top of the mixing frame 3, a round rod 44 is rotatably connected inside the mixing frame 3, the round rod 44 extends outside the mixing frame 3, a cavity 45 is opened on the round rod 44, a main stirring rod 46 is arranged outside the round rod 44, the outer side of the main stirring rod 46 is in contact with the inner cavity wall of the mixing frame 3, a positioning rod 47 is fixedly connected to the outside of the round rod 44, the positioning rod 47 extends into the main stirring rod 46 and is slidably connected to the main stirring rod 46, a spring 48 is fixedly connected to the positioning rod 47, the spring 48 is fixedly connected to the inside of the main stirring rod 46, a stop bar 49 is fixedly connected to the inner side of the main stirring rod 46, the stop bars 49 are arranged at equal intervals on the inner side of the main stirring rod 46, a mounting plate 491 is rotatably connected inside the round rod 44, an auxiliary plate 492 is fixedly connected to one side wall of the mixing frame 3, the mounting plate 491 extends outside the round rod 44, the auxiliary plate 492 is fixedly connected to the inner side of the auxiliary plate 492, a bidirectional threaded rod 493 is rotatably connected to the inner side of the mounting plate 491, two moving blocks 494 are slidably connected inside the mounting plate 491, the bidirectional threaded rod 493 sequentially penetrates through the two moving blocks 494, and the bidirectional threaded rod 493 is threadedly connected to the moving blocks 494;

[0060] One of the moving blocks 494 is movably connected with a first swing rod 495 through a movable hinge seat, and the other moving block 494 is movably connected with a second swing rod 496 through a movable hinge seat. One end of the first swing rod 495 extends into the second swing rod 496, and the first swing rod 495 and the second swing rod 496 are connected by a rotating shaft. A contact rod 497 is fixedly connected to the inner side of the main stirring rod 46. When mixing various raw materials, the raw materials are conveyed into the mixing box 3 through the opening at the top of the mixing box 3. Finally, the round rod 44 is controlled to rotate. After the round rod 44 drives the main stirring rod 46 to rotate, the purpose of mixing and stirring the raw materials inside the mixing box 3 can be achieved. During the stirring process, the connecting end between the first swing rod 495 and the second swing rod 496 always faces the through groove 43. Therefore, when feeding, the mixing box 3 is controlled to rotate so that the through groove 43 faces downward. Subsequently, during the rotation of the round rod 44, the discharge of the raw materials through the through groove 43 can be accelerated. Further, the bidirectional threaded rod 493 is controlled to rotate, and the ends of the first swing rod 495 and the second swing rod 496 push against the contact rod 497. With the elastic force of the spring 48, the main stirring rod 46 shakes at the position of the through groove 43, and the raw materials remaining on the main stirring rod 46 itself can be shaken off, achieving the purpose of full discharge of materials.

[0061] The bidirectional threaded rod 493 extends outside the round rod 44. One end of the bidirectional threaded rod 493 is rotatably connected to the inner side of the auxiliary plate 492. A circular baffle 498 is rotatably connected inside the round rod 44. The mounting plate 491 penetrates through the circular baffle 498. The bidirectional threaded rod 493 penetrates through the circular baffle 498 and is rotatably connected to the circular baffle 498. One side of the auxiliary plate 492 is fixedly connected with a first motor 499. The first motor 499 is fixedly connected with one end of the bidirectional threaded rod 493 through an output shaft. The circular baffle 498 can prevent the mixed material in the mixing box 3 from being discharged outside the mixing cavity through the cavity 45. A U-shaped plate 481 is fixedly connected to one side wall of the mixing box 3. One end of the round rod 44 is rotatably connected to the inner side of the U-shaped plate 481. A second motor 482 is fixedly connected to one side of the U-shaped plate 481. The second motor 482 is fixedly connected with a first gear 483 through an output shaft. A second gear 484 is fixedly connected to the outside of the round rod 44. The first gear 483 meshes with the second gear 484. After the first gear 483 rotates, it drives the second gear 484 to rotate;

[0062] A third gear 485 is fixedly connected to the outside of one of the connecting rods 42. A lifting plate 486 is slidably connected to one side wall of the support plate 41. A first rack 487 is fixedly connected to the lifting plate 486. The first rack 487 is arranged at the rear side of the third gear 485, and the first rack 487 meshes with the third gear 485. A square plate is fixedly connected to one side wall of the support plate 41. A first electric push rod 488 is fixedly connected to the bottom of the square plate. One end of the first electric push rod 488 is fixedly connected to the top of the lifting plate 486. After the first electric push rod 488 works, it can push and pull the lifting plate 486 up and down;

[0063] On both side walls of the mixing box 3, there are fixedly connected track plates 489. A cover plate 471 is slidably connected between the two track plates 489. The cover plate 471 is in contact with the outer surface of the mixing box 3. A frame plate 472 is arranged outside the mixing box 3. The two ends of the frame plate 472 are respectively fixedly connected to the two track plates 489. After the cover plate 471 moves to the outside of the through groove 43, it shields and seals the part of the through groove 43. A transmission rod 473 is rotatably connected to the inner side of the frame plate 472. A third motor 474 is fixedly connected to one side wall of the frame plate 472. The third motor 474 is fixedly connected to one end of the transmission rod 473 through an output shaft. Two fourth gears 475 are fixedly connected to the outside of the transmission rod 473. Two second racks 476 are fixedly connected to the cover plate 471. The two second racks 476 are respectively engaged with the two fourth gears 475. After the second rack 476 moves, it drives the fourth gear 475 to rotate.

[0064] A sampling mechanism 5 is arranged at the bottom of the mixing box 3. The sampling mechanism 5 includes a placement seat 51. The placement seat 51 is fixedly connected to the bottom of the mixing box 3. A sampling plate 52 is arranged at the bottom of the mixing box 3. The sampling plate 52 penetrates through the placement seat 51 and matches with the placement seat 51. A sampling groove 53 is formed on the sampling plate 52. The sampling groove 53 is communicated with the mixing box 3. A cross plate 54 is fixedly connected between adjacent sampling plates 52. A vertical plate 55 is fixedly connected to the mixing box 3. A connecting plate 56 is arranged on one side of the vertical plate 55. The connecting plate 56 penetrates through the vertical plate 55, and both ends of the connecting plate 56 are fixedly connected to the cross plate 54. A second electric push rod 57 is fixedly connected to one side wall of the connecting plate 56. One end of the second electric push rod 57 is fixedly connected to one side of the vertical plate 55. After the second electric push rod 57 expands and contracts, it drives the connecting plate 56 to move.

[0065] A feeding mechanism 6 is arranged at the top of the main body plate 2. The feeding mechanism 6 includes a feeding hopper 61. The feeding hopper 61 penetrates through the top wall of the main body plate 2 and is slidably connected to the main body plate 2. An L-shaped plate 62 is fixedly connected to the front side of the main body plate 2. A control block 63 is slidably connected to the inner side of the L-shaped plate 62. The top of the control block 63 is movably connected to a push-pull rod 64 through a movable hinge seat. One end of the push-pull rod 64 is movably connected to one side wall of the feeding hopper 61 through a movable hinge seat. After the control block 63 moves, it drives the push-pull rod 64 to flip. After the push-pull rod 64 flips, it pushes the feeding hopper 61. A third electric push rod 65 is fixedly connected to one side wall of the L-shaped plate 62. One end of the third electric push rod 65 is fixedly connected to one side of the control block 63. After the third electric push rod 65 works, it pushes and pulls the control block 63.

[0066] During the actual operation process, first, the mixing device is powered on, and each raw material with a good ratio is put into the mixing frame 3 through the through groove 43. When specifically putting in the raw materials, the third electric push rod 65 works and pulls the control block 63. After the control block 63 moves, it drives the push and pull rod 64 to flip. After the push and pull rod 64 flips, it pulls the feed hopper 61, prompting the feed hopper 61 to move up and down. At this time, the feed hopper 61 descends so that the bottom of the feed hopper 61 can be closer to the through groove 43. Subsequently, the raw materials can be discharged into the through groove 43 through the feed hopper 61 to achieve precise feeding and avoid the situation where the raw materials fall outside the mixing frame 3. After the feeding is completed, control the feed hopper 61 to move up to prevent the feed hopper 61 from hindering the flipping of the mixing frame 3;

[0067] After the third motor 474 works, it drives the transmission rod 473 to rotate. The transmission rod 473 drives the fourth gear 475 to rotate. The fourth gear 475 drives the second rack 476 to move. Then the second rack 476 drives the cover plate 471 to move along the inner channel of the track plate 489. When the cover plate 471 moves to the outside of the through groove 43, it can provide a sealed shield for the through groove 43. When the cover plate 471 moves to one side of the through groove 43, it can send raw materials into the through groove 43 or discharge the mixed raw materials through this place. After the feeding is completed, control the cover plate 471 to block the through groove 43. Subsequently, the second motor 482 works and drives the first gear 483 to rotate. The first gear 483 drives the second gear 484 to rotate. The second gear 484 drives the round rod 44 to rotate. The round rod 44 drives the main stirring rod 46 to rotate. After the main stirring rod 46 rotates, it shovels up the raw materials inside the mixing frame 3. After the raw materials are shoveled up, they fall from a high place. When falling, the baffle 49 inside the main stirring rod 46 will block the raw materials, prompting the raw materials to fall through the gaps between adjacent baffles 49 to achieve subdivision and shaking to enhance the mixing speed of each material;

[0068] During the mixing and stirring process, after the second electric push rod 57 extends or contracts, it can drive the connecting plate 56 to move. The connecting plate 56 drives the cross plate 54 to move, and the cross plate 54 drives the sampling plate 52 to move. When the area outside the sampling groove 53 on the sampling plate 52 stays inside the placement seat 51, the bottom of the mixing frame 3 is in a sealed state. In order to enable the staff to timely understand the mixing situation of the raw materials inside, the movement of the sampling plate 52 is controlled through the above steps, so that the sampling groove 53 is in the placement frame. At this time, the mixed material in the mixing frame 3 can fall into the sampling groove 53. After collecting the mixed material sample in the sampling groove 53, control the sampling plate 52 to move until the sampling groove 53 leaves the placement frame, and then the user can check the mixed material in the sampling groove 53, which is beneficial for the user to more directly grasp the mixing situation. Moreover, the mixed materials in different sampling grooves 53 further reflect the mixing situation in different areas inside the mixing frame 3, avoiding the situation of insufficiently uniform mixing. Compared with the traditional mixing method where manual workers cannot properly understand the internal mixing situation, it is more conducive to intuitively grasping the mixing process;

[0069] After the first electric push rod 488 works, it pushes and pulls the lifting plate 486 up and down. The lifting plate 486 drives the first rack 487 to move, the first rack 487 drives the third gear 485 to rotate, the third gear 485 drives the connected connecting rod 42 to rotate, the connecting rod 42 drives the support plate 41 to rotate, and the support plate 41 drives the mixing frame 3 to rotate. After the inspection of the sample is completed through the above work, control the sampling groove 53 to move back inside the placement seat 51 again, and then control the mixing frame 3 to rotate, so that the sampling plate 52 stays directly above the mixing frame 3. Then the sample in the sampling groove 53 will fall into the mixing frame 3 and continue to be mixed and stirred. When the mixing work is completed, control the mixing frame 3 to rotate until the through groove 43 is directly below the mixing frame 3, and repeat the above steps to control the cover plate 471 to remove the blockage of the through groove 43. At this time, the mixed material can be discharged downward through the through groove 43. During the discharging process, continue to control the round rod 44 to rotate, and then the main stirring rod 46 continues to scrape the inside of the mixing frame 3, so that the mixed material can be fully discharged downward;

[0070] Since the mounting plate 491 is fixedly connected to the auxiliary plate 492, the mounting plate 491 does not rotate with the round rod 44. The connection position of the end portions of the first swing rod 495 and the second swing rod 496 always faces the position of the through groove 43. During discharging, in order to prevent the mixed material from adhering to the baffle 49 of the main stirring rod 46, the main stirring rod 46 is controlled to move to a position perpendicular to the through groove 43 and then stay. Subsequently, the first motor 499 operates and drives the bidirectional threaded rod 493 to rotate. The bidirectional threaded rod 493 drives the two moving blocks 494 to move towards each other. After the two moving blocks 494 move, they drive the first swing rod 495 and the second swing rod 496 to swing respectively. At this time, the connection at the end between the first swing rod 495 and the second swing rod 496 moves towards the contact rod 497 staying inside the main stirring rod 46 at the position of the through groove 43 and pushes the contact rod 497. After the contact rod 497 is stressed, it drives the main stirring rod 46 to move. Since the spring 48 exerts an elastic pulling force on the main stirring rod 46, with the cooperation of this elastic pulling force and the continuous pushing force, the rapid shaking of the main stirring rod 46 can be realized, so as to shake off the mixed material that may adhere to the main stirring rod 46 itself, ensure that the mixed material can be fully discharged, and at the same time reduce the subsequent cleaning pressure.

[0071] The above are all the preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby. Therefore, all equivalent changes made according to the structure, shape and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A process for preparing manganese-zinc soft ferrite powder for automotive electronics, characterized in that: The following steps are involved: S1. Grinding the raw materials, grinding the raw materials of iron oxide, zinc oxide and manganese oxide respectively, and weighing them according to the proportion after grinding; S2. Material mixing, the raw materials are sequentially put into the mixing device to mix the ingredients, and at the same time, 3 to 5% of fine camphor powder is added; S3. Mixture sampling: during the mixing process, samples are taken from different areas of the mixing device. After sampling, the staff will judge the overall mixing situation and dry it after mixing. S4. Pre-sintering, pre-sintering the mixed dried material, and setting the temperature to between 850 and 980° C. during sintering; S5. Powder granulation, using a ball mill to grind the sintered material, and after grinding, using a spray granulation device to granulate the powder; The mixing device in step S2 and step S3 comprises a bottom plate (1), a main plate (2) is fixedly connected to the top of the bottom plate (1), a mixing frame (3) is arranged inside the main plate (2), and a material control mechanism (4) is arranged on the mixing frame (3); The material control mechanism (4) comprises two support plates (41), the two support plates (41) are respectively fixedly connected to the two side walls of the mixing frame (3), the two support plates (41) are both fixedly connected to a connecting rod (42), the two connecting rods (42) respectively penetrate the two side walls of the main plate (2) and are rotatably connected to the main plate (2), a through groove (43) is formed on the top of the mixing frame (3), a round rod (44) is rotatably connected inside the mixing frame (3), the round rod (44) extends outside the mixing frame (3), and a cavity (45) is formed on the round rod (44). A stirring main rod (46) is arranged outside the round rod (44), the outer side of the stirring main rod (46) contacts the inner cavity wall of the mixing frame (3), a positioning rod (47) is fixedly connected to the outer side of the round rod (44), the positioning rod (47) extends into the interior of the stirring main rod (46) and is slidably connected to the stirring main rod (46), a spring (48) is fixedly connected to the positioning rod (47), the spring (48) is fixedly connected to the interior of the stirring main rod (46), a retaining bar (49) is fixedly connected to the inner side of the stirring main rod (46), and the retaining bar (49) is fixedly connected to the stirring main rod (46). The inner sides of the round rods (46) are arranged at equal intervals, the inner side of the round rods (44) is rotatably connected to a mounting plate (491), a side wall of the mixing frame (3) is fixedly connected to an auxiliary plate (492), the mounting plate (491) extends outside the round rods (44), one side of the auxiliary plate (492) is fixedly connected to the inner side of the auxiliary plate (492), the inner side of the mounting plate (491) is rotatably connected to a bidirectional threaded rod (493), the inner side of the mounting plate (491) is slidably connected to two moving blocks (494), the bidirectional threaded rod (493) sequentially passes through the two moving blocks (494). A movable block (494) is provided, and the bidirectional threaded rod (493) is connected to the movable block (494) by threads, one of the movable blocks (494) is movably connected to a first swing rod (495) by a movable hinge seat, and the other movable block (494) is movably connected to a second swing rod (496) by a movable hinge seat, one end of the first swing rod (495) extends into the interior of the second swing rod (496), and the first swing rod (495) and the second swing rod (496) are connected by a rotating shaft, and a contact rod (497) is fixedly connected to the inner side of the stirring main rod (46); A sampling mechanism (5) is provided at the bottom of the mixing frame (3), the sampling mechanism (5) comprising a placement seat (51), the placement seat (51) being fixedly connected to the bottom of the mixing frame (3), a sampling plate (52) being provided at the bottom of the mixing frame (3), the sampling plate (52) penetrating the placement seat (51) and matching the placement seat (51), a sampling slot (53) being provided on the sampling plate (52), the sampling slot (53) being connected to the mixing frame (3), a horizontal plate (54) being fixedly connected between adjacent sampling plates (52), a vertical plate (55) being fixedly connected to the mixing frame (3), a connecting plate (56) being provided on one side of the vertical plate (55), the connecting plate (56) penetrating the vertical plate (55), and both ends of the connecting plate (56) being fixedly connected to the horizontal plate (54), a second electric push rod (57) being fixedly connected to one side wall of the connecting plate (56), and one end of the second electric push rod (57) being fixedly connected to one side of the vertical plate (55); A feeding mechanism (6) is provided at the top of the main body plate (2), the feeding mechanism (6) comprising a feeding hopper (61), the feeding hopper (61) penetrating the top wall of the main body plate (2) and being slidably connected to the main body plate (2), an L-shaped plate (62) being fixedly connected to the front side of the main body plate (2), a control block (63) being slidably connected to the inner side of the L-shaped plate (62), a push-pull rod (64) being movably connected to the top of the control block (63) via a movable hinge seat, one end of the push-pull rod (64) being movably connected to a side wall of the feeding hopper (61) via a movable hinge seat, a third electric push rod (65) being fixedly connected to one side wall of the L-shaped plate (62), one end of the third electric push rod (65) being fixedly connected to one side of the control block (63).

2. The process for preparing a manganese-zinc soft ferrite powder for automotive electronics according to claim 1, characterized in that: The bidirectional threaded rod (493) extends out of the round rod (44); one end of the bidirectional threaded rod (493) is rotatably connected to the inside of the auxiliary plate (492); a circular baffle (498) is rotatably connected to the inside of the round rod (44); the mounting plate (491) passes through the circular baffle (498); the bidirectional threaded rod (493) passes through the circular baffle (498) and is rotatably connected to the circular baffle (498); a first motor (499) is fixedly connected to one side of the auxiliary plate (492); and the first motor (499) is fixedly connected to one end of the bidirectional threaded rod (493) via an output shaft.

3. The process for preparing a manganese-zinc soft ferrite powder for automotive electronics according to claim 1, characterized in that: A U-shaped plate (481) is fixedly connected to one side wall of the mixing frame (3); one end of the round rod (44) is rotatably connected to the inner side of the U-shaped plate (481); a second motor (482) is fixedly connected to one side of the U-shaped plate (481); the second motor (482) is fixedly connected to a first gear (483) via an output shaft; a second gear (484) is fixedly connected to the outside of the round rod (44); and the first gear (483) is meshed with the second gear (484).

4. The process for preparing a manganese-zinc soft ferrite powder for automotive electronics according to claim 1, characterized in that: One of the connecting rods (42) is fixedly connected to the outside with a third gear (485), a lifting plate (486) is slidably connected to a side wall of the support plate (41), a first rack (487) is fixedly connected to the lifting plate (486), the first rack (487) is arranged on the rear side of the third gear (485), and the first rack (487) is meshed with the third gear (485), a square plate is fixedly connected to a side wall of the support plate (41), a first electric push rod (488) is fixedly connected to the bottom of the square plate, and one end of the first electric push rod (488) is fixedly connected to the top of the lifting plate (486).

5. The process for preparing a manganese-zinc soft ferrite powder for automotive electronics according to claim 1, characterized in that: Track plates (489) are fixedly connected to both side walls of the mixing frame (3); a cover plate (471) is slidably connected between the two track plates (489); the cover plate (471) is in contact with the outer surface of the mixing frame (3); a frame plate (472) is arranged on the outer side of the mixing frame (3); two ends of the frame plate (472) are respectively fixedly connected to the two track plates (489).

6. The process for preparing a manganese-zinc soft ferrite powder for automotive electronics according to claim 5, characterized in that: A transmission rod (473) is rotatably connected to the inner side of the frame plate (472); a third motor (474) is fixedly connected to one side wall of the frame plate (472); the third motor (474) is fixedly connected to one end of the transmission rod (473) via an output shaft; two fourth gears (475) are fixedly connected to the outside of the transmission rod (473); and two second racks (476) are fixedly connected to the cover plate (471); the two second racks (476) are respectively meshed with the two fourth gears (475).

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