Iron-silicon magnetic powder core and preparation method thereof

Abstract

The invention discloses an iron-silicon magnetic powder core and a preparation method thereof, and relates to the field of iron-silicon magnetic powder cores. The preparation method of the iron-silicon magnetic powder core comprises the following steps: step 1, adding a passivating agent into iron-silicon powder and mixing; 2, adding an adhesive into the iron-silicon powder, and mixing; 3, adding the iron-silicon powder into stearate, and mixing; 4, the mixed iron-silicon powder is subjected to dry pressing to form a magnet powder core green body; and 5, cooling and forming the magnetic powder core blank. According to the preparation method of the iron-silicon magnetic powder core, when iron-silicon powder and a passivating agent are mixed, firstly, the iron-silicon powder and the passivating agent are put into a first feeding port and a second feeding port correspondingly, the iron-silicon powder and the passivating agent directly enter a pre-mixing unit, the pre-mixing unit conducts preliminary mixing on the iron-silicon powder and the passivating agent, and then the iron-silicon powder and the passivating agent are discharged downwards in a rotating mode; the materials enter the bottom of the mixing tank body, and then the stirring and mixing unit can be used for carrying out secondary stirring and mixing on the materials discharged by the pre-mixing unit, so that the iron-silicon powder and the passivating agent can be rapidly stirred and mixed.

Description

Technical Field

[0001] The invention relates to the technical field of iron silicon magnetic powder cores, in particular to an iron silicon magnetic powder core and a preparation method thereof. Background Art

[0002] Iron silicon magnetic powder core is a magnetic material made of silicon and iron alloy powder in a specific ratio. It is widely used in the modern electronic industry. The saturation magnetic induction intensity of iron silicon magnetic powder core is high, which can reach more than 1.5T, which is more than twice that of traditional ferrite core.

[0003] In the process of preparing the iron silicon magnetic powder core, it is first necessary to use a mixing device to stir and mix the iron silicon magnetic powder and a variety of additives in sequence, and then press the mixed material into a shape through a pressing device.

[0004] However, in the process of stirring and mixing ferrosilicon magnetic powder and multiple additives in succession with existing stirring equipment, the ferrosilicon magnetic powder is generally placed in a mixing tank first, and then the multiple additives are added in sequence. During the adding process, local accumulation of additives is very likely to occur. When multiple additives are added, the previous additive needs to be fully stirred before adding another additive. Therefore, the mixing tank needs to be stirred and mixed for a longer time to fully stir and mix the ferrosilicon magnetic powder and the additives. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides an iron silicon magnetic powder core and a preparation method thereof, which solves the problem that in the process of stirring and mixing iron silicon magnetic powder and multiple additives in succession with the existing stirring equipment, the iron silicon magnetic powder is generally placed in a mixing tank first, and then the multiple additives are added in sequence. During the addition process, local accumulation of additives is likely to occur, and the mixing tank needs to be stirred and mixed for a longer time to fully stir and mix the iron silicon magnetic powder and the additives.

[0006] To achieve the above objectives, the present invention is implemented by the following technical scheme: A method for preparing an iron silicon magnetic powder core comprises the following steps: Step 1: Add the iron silicon powder to the passivator and mix them. The passivator is permanganate. The iron silicon powder and the permanganate are placed in a mixing device, and the mixing device is used to quickly mix and heat and dry them; Step 2: Add iron silicon powder to the binder and mix them. Put the binder into a mixing device and quickly mix the binder with the internal materials through the mixing device. Step 3: Add iron silicon powder to stearate and mix, put the stearate into a mixing device, and quickly mix the stearate with the internal materials through the mixing device; Step 4: Dry-pressing the mixed iron-silicon powder into a green magnet powder core. The iron-silicon powder mixture is taken out from the mixing device, and then pressed into a green magnet powder core by a pressing device. Step 5: Cooling the green magnetic powder core to form the green magnetic powder core. The green magnetic powder core is heated and then cooled to room temperature. The mixing device is used for rapid mixing of materials, and the mixing device comprises: A mixing tank body, wherein a first feed inlet and a second feed inlet are installed on the top of the mixing tank body, a discharge port is installed on the bottom of the mixing tank body, and a driving motor is fixedly installed on the top of the mixing tank body, a driving rod is fixedly provided on the output end of the driving motor, and the bottom end of the driving rod extends toward the inside of the mixing tank body; A premixing unit, which is arranged inside the mixing tank and connected to the driving rod, and can preliminarily mix the materials input from the first feed inlet and the second feed inlet and discharge them downwards; The stirring and mixing unit is arranged inside the mixing tank and connected to the driving rod. The stirring and mixing unit can perform secondary stirring and mixing on the materials discharged from the pre-mixing unit.

[0007] Preferably, the premixing unit comprises: A rotating frame, the rotating frame is rotatably arranged on the inner top of the mixing tank body, and a mixing bin, a first feeding bin and a second feeding bin are arranged inside the rotating frame, the first feeding bin and the second feeding bin are respectively connected to the first feeding port and the second feeding port, and a plurality of scrapers are fixedly arranged inside the mixing bin; The support seat is fixedly arranged inside the mixing tank body, the rotating frame and a plurality of scrapers are rotatably arranged above the support seat, and a plurality of discharge ports are opened above the support seat.

[0008] Preferably, the rotating frame includes a first plate, a second plate and a third plate, the third plate is arranged between the first plate and the second plate, and a plurality of connecting rods are fixedly connected between the first plate, the second plate and the third plate, and a plurality of rotating rods are fixedly installed between the first plate and the driving rod.

[0009] Preferably, the space between the first plate and the second plate forms a mixing bin, the space between the first plate and the third plate forms a second feeding bin, and the space between the second plate and the third plate forms a first feeding bin.

[0010] Preferably, the stirring and mixing unit comprises: A lifting rod, the lifting rod is rotatably arranged inside the mixing tank body, and the top end of the lifting rod extends upward through the support seat and is fixedly connected to the bottom end of the driving rod; The stirring rod is rotatably arranged inside the mixing tank body, and the top end of the lifting rod extends upward through the supporting seat and a belt transmission part is arranged between the lifting rod and the lifting rod.

[0011] Preferably, the outer sides of the lifting rod and the stirring rod are respectively fixedly sleeved with a spiral blade and a stirring blade.

[0012] Preferably, a plurality of scraping strips are fixedly provided at the bottom end of the lifting rod, and the plurality of scraping strips are all in contact with the inner bottom wall of the mixing tank body.

[0013] Preferably, the belt transmission member includes a driving pulley and a linkage pulley, which are respectively fixedly sleeved on the outer sides of the top ends of the lifting rod and the stirring rod, and a transmission belt is arranged between the driving pulley and the linkage pulley for transmission.

[0014] A ferrosilicon magnetic powder core is prepared by a ferrosilicon magnetic powder core preparation method.

[0015] The present invention discloses an iron silicon magnetic powder core and a preparation method thereof, which have the following beneficial effects: The preparation method of the iron silicon magnetic powder core comprises the following steps: in the process of stirring and mixing the iron silicon powder and the passivator, the iron silicon powder and the passivator are firstly put into a first feed port and a second feed port respectively, the iron silicon powder and the passivator directly enter a premixing unit, the premixing unit performs preliminary mixing on the iron silicon powder and the passivator and then rotates and discharges the mixture downward to enter the bottom of a mixing tank body, and then the stirring and mixing unit can perform secondary stirring and mixing on the materials discharged from the premixing unit, so that the iron silicon powder and the passivator can be quickly stirred and mixed, and then the adhesive and the stearate are successively put into the premixing unit through the first feed port and the second feed port, and at this time, the adhesive and the stearate are successively rotated and discharged downward by the premixing unit, so that the adhesive and the stearate can be discharged downward more evenly and contact the mixture of the iron silicon powder and the passivator below, and no local accumulation occurs, thereby accelerating the mixing efficiency of the stirring and mixing unit.

[0016] The method for preparing the iron silicon magnetic powder core is as follows: after the material is put into the first feed port and the second feed port, the material directly enters the first feed bin and the second feed bin, and then enters the mixing bin after passing through the first feed bin and the second feed bin and falls onto the top of the support seat; during the rotation of the rotating frame, a plurality of scrapers are used to scrape the material in the mixing bin above the support seat until the material falls downward from a plurality of discharge ports opened above the support seat, thereby causing the material to be discharged downward more evenly.

[0017] The preparation method of the iron silicon magnetic powder core is that the driving rod can directly drive the lifting rod to rotate inside the mixing tank body during use, and at the same time drive the stirring rods on both sides to rotate through the belt transmission part, and the lifting rod and the stirring rod rotate at the same time, so that the spiral blades on the outside of the lifting rod can drive the material at the bottom to rotate outward, and the stirring blades on the outside of the stirring rods on both sides can stir the material when rotating, thereby increasing the dispersion of the internal material and enhancing the mixing effect. By setting a plurality of scraping bars, the plurality of scraping bars rotate with the rotation of the lifting rod, and the plurality of scraping bars are all in contact with the inner bottom wall of the mixing tank body, so that the material on the inner bottom wall of the mixing tank body is stirred accordingly, thereby enhancing the mixing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the preparation method of the present invention; Figure 2 It is a structural schematic diagram of the mixing device of the present invention; Figure 3 It is a structural cross-sectional view of the mixing device of the present invention; Figure 4 This is a cross-sectional view of the top structure of the mixing device of the present invention; Figure 5 For the present invention Figure 4 A part of the enlarged schematic diagram; Figure 6 The second cross-sectional view of the top structure of the mixing device of the present invention; Figure 7 It is a structural schematic diagram of the rotating frame of the present invention; Figure 8 It is a schematic structural diagram of the stirring and mixing unit of the present invention.

[0020] In the figure: 1. mixing tank body; 11. first feed port; 12. second feed port; 13. discharge port; 14. driving motor; 15. driving rod; 2. pre-mixing unit; 21. rotating frame; 211. first plate; 212. second plate; 213. third plate; 214. connecting rod; 215. rotating rod; 22. mixing bin; 23. first feed bin; 24. second feed bin; 25. supporting seat; 26. discharge port; 27. scraper; 3. stirring and mixing unit; 31. lifting rod; 32. stirring rod; 33. spiral blade; 34. stirring blade; 35. belt transmission member; 36. scraper. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] The embodiment of the present application provides an iron silicon magnetic powder core and a preparation method thereof, which solves the problem that in the process of stirring and mixing iron silicon magnetic powder and multiple additives in succession in the existing stirring equipment, the iron silicon magnetic powder is generally placed in a mixing tank first, and then multiple additives are added in sequence. During the addition process, it is easy to have local accumulation of additives, and the mixing tank needs to be stirred and mixed for a longer time to fully stir and mix the iron silicon magnetic powder and the additives. The iron silicon powder and the passivator are respectively put into the first feed port 11 and the second feed port 12, and the iron silicon powder and the passivator directly enter the pre-mixing unit 2. The pre-mixing unit 2 performs a preliminary mixing of the iron silicon powder and the passivator and then rotates and discharges downward to the bottom of the mixing tank body 1. Then, the stirring and mixing unit 3 can stir and mix the materials discharged from the pre-mixing unit 2 for a second time, so that the iron silicon powder and the passivator can be quickly stirred and mixed.

[0023] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0024] The embodiment of the invention discloses an iron silicon magnetic powder core and a preparation method thereof.

[0025] According to the attached Figure 1-8 As shown, a method for preparing an iron silicon magnetic powder core comprises the following steps: Step 1: Add the iron silicon powder to the passivator and mix them. The passivator is permanganate. The iron silicon powder and the permanganate are placed in a mixing device, and the mixing device is used to quickly mix and heat and dry them; Step 2: Add iron silicon powder to the binder and mix them. Put the binder into a mixing device and quickly mix the binder with the internal materials through the mixing device. Step 3: Add iron silicon powder to stearate and mix, put the stearate into a mixing device, and quickly mix the stearate with the internal materials through the mixing device; Step 4: Dry-pressing the mixed iron-silicon powder into a green magnet powder core. The iron-silicon powder mixture is taken out from the mixing device, and then pressed into a green magnet powder core by a pressing device. Step 5: Cooling the green magnetic powder core to form the green magnetic powder core. The green magnetic powder core is heated and then cooled to room temperature. Mixing equipment is used for rapid mixing of materials, and the mixing equipment includes: A mixing tank body 1, a first feed port 11 and a second feed port 12 are installed on the top of the mixing tank body 1, a discharge port 13 is installed on the bottom of the mixing tank body 1, and a driving motor 14 is fixedly installed on the top of the mixing tank body 1, a driving rod 15 is fixedly provided at the output end of the driving motor 14, and the bottom end of the driving rod 15 extends toward the inside of the mixing tank body 1; The premixing unit 2 is disposed inside the mixing tank 1 and connected to the driving rod 15. The premixing unit 2 can preliminarily mix the materials input from the first feed port 11 and the second feed port 12 and discharge them downwards; The stirring and mixing unit 3 is arranged inside the mixing tank 1 and connected to the driving rod 15 . The stirring and mixing unit 3 can perform secondary stirring and mixing on the materials discharged from the pre-mixing unit 2 .

[0026] In the process of stirring and mixing the ferrosilicon powder and the passivator, the ferrosilicon powder and the passivator are firstly put into the first feed port 11 and the second feed port 12 respectively, and the ferrosilicon powder and the passivator directly enter the premixing unit 2. The premixing unit 2 performs preliminary mixing on the ferrosilicon powder and the passivator and then rotates and discharges downward to the bottom of the mixing tank body 1. Then, the stirring and mixing unit 3 can stir and mix the materials discharged from the premixing unit 2 for the second time, so that the ferrosilicon powder and the passivator can be quickly stirred and mixed. Then, the adhesive and stearate are successively put into the premixing unit 2 through the first feed port 11 and the second feed port 12. At this time, the premixing unit 2 rotates and discharges the adhesive and stearate downward in turn, so that the adhesive and stearate can be discharged downward more evenly and contact the mixture of the ferrosilicon powder and the passivator below, and no local accumulation will occur, thereby accelerating the mixing efficiency of the stirring and mixing unit 3.

[0027] Particularly disclosed, the premixing unit 2 comprises: A rotating frame 21 is rotatably arranged on the inner top of the mixing tank body 1, and a mixing bin 22, a first feeding bin 23 and a second feeding bin 24 are arranged inside the rotating frame 21, the first feeding bin 23 and the second feeding bin 24 are respectively connected to the first feeding port 11 and the second feeding port 12, and a plurality of scrapers 27 are fixedly arranged inside the mixing bin 22; The support seat 25 is fixedly arranged inside the mixing tank body 1 , the rotating frame 21 and a plurality of scrapers 27 are rotatably arranged above the support seat 25 , and a plurality of discharge ports 26 are opened above the support seat 25 .

[0028] After the material is put into the first feed port 11 and the second feed port 12, the material directly enters the first feed bin 23 and the second feed bin 24, and then enters the mixing bin 22 after passing through the first feed bin 23 and the second feed bin 24 and falls above the support seat 25. During the rotation of the rotating frame 21, multiple scrapers 27 are used to scrape the material in the mixing bin 22 above the support seat 25 until the material falls downward from the multiple discharge ports 26 opened above the support seat 25, so that it can be discharged downward more evenly.

[0029] Furthermore, the rotating frame 21 includes a first plate 211, a second plate 212 and a third plate 213, the third plate 213 is arranged between the first plate 211 and the second plate 212, and a plurality of connecting rods 214 are fixedly connected between the first plate 211, the second plate 212 and the third plate 213, and a plurality of rotating rods 215 are fixedly installed between the first plate 211 and the driving rod 15.

[0030] Multiple connecting rods 214 can effectively connect the first plate 211, the second plate 212 and the third plate 213. When the driving rod 15 rotates under the action of the driving motor 14, the first plate 211, the second plate 212 and the third plate 213 can be driven to rotate simultaneously through the multiple rotating rods 215.

[0031] Furthermore, the space between the first plate 211 and the second plate 212 forms a mixing bin 22 , the space between the first plate 211 and the third plate 213 forms a second feeding bin 24 , and the space between the second plate 212 and the third plate 213 forms a first feeding bin 23 .

[0032] When the first plate 211, the second plate 212 and the third plate 213 perform circular motion, the first feed bin 23 and the second feed bin 24 are always connected with the first feed port 11 and the second feed port 12, and the first plate 211, the second plate 212 and the third plate 213 play a blocking role to prevent the material from moving to the outside.

[0033] Particularly disclosed, the stirring and mixing unit 3 comprises: A lifting rod 31, the lifting rod 31 is rotatably disposed inside the mixing tank body 1, and the top end of the lifting rod 31 extends upward through the support seat 25 and is fixedly connected to the bottom end of the driving rod 15; The stirring rod 32 is rotatably arranged inside the mixing tank 1 , and the top end of the lifting rod 31 passes through the support seat 25 and extends upward, and a belt transmission member 35 is arranged between the lifting rod 31 and the lifting rod 31 .

[0034] During use, the driving rod 15 can directly drive the lifting rod 31 to rotate inside the mixing tank body 1, and at the same time drive the stirring rods 32 on both sides to rotate through the belt transmission part 35. The lifting rod 31 cooperates with the stirring rods 32 on both sides to perform stirring and mixing.

[0035] Furthermore, the outer sides of the lifting rod 31 and the stirring rod 32 are respectively fixedly sleeved with a spiral blade 33 and a stirring blade 34 .

[0036] When the lifting rod 31 and the stirring rod 32 rotate at the same time, the spiral blades 33 on the outside of the lifting rod 31 can drive the material at the bottom to rotate outward, and the stirring blades 34 on the outside of the stirring rods 32 on both sides can stir the material while rotating, thereby increasing the dispersion of the internal material and enhancing the mixing effect.

[0037] Furthermore, a plurality of scraping strips 36 are fixedly provided at the bottom end of the lifting rod 31 , and the plurality of scraping strips 36 are all in contact with the inner bottom wall of the mixing tank body 1 .

[0038] The multiple scraping bars 36 are arranged to rotate along with the rotation of the lifting rod 31, and the multiple scraping bars 36 are all in contact with the inner bottom wall of the mixing tank body 1, so that the material on the inner bottom wall of the mixing tank body 1 is stirred, thereby enhancing the mixing effect.

[0039] Furthermore, the belt transmission member 35 includes a driving pulley and a linkage pulley, which are respectively fixedly sleeved on the outer sides of the top ends of the lifting rod 31 and the stirring rod 32, and a transmission belt is arranged between the driving pulley and the linkage pulley for transmission.

[0040] A ferrosilicon magnetic powder core is prepared by a ferrosilicon magnetic powder core preparation method.

[0041] In the process of stirring and mixing the ferrosilicon powder and the passivator, the ferrosilicon powder and the passivator are firstly put into the first feed port 11 and the second feed port 12 respectively, and the ferrosilicon powder and the passivator directly enter the premixing unit 2. The premixing unit 2 performs preliminary mixing on the ferrosilicon powder and the passivator and then rotates and discharges downward to the bottom of the mixing tank body 1. Then, the stirring and mixing unit 3 can stir and mix the materials discharged from the premixing unit 2 for the second time, so that the ferrosilicon powder and the passivator can be quickly stirred and mixed. Then, the adhesive and stearate are successively put into the premixing unit 2 through the first feed port 11 and the second feed port 12. At this time, the premixing unit 2 rotates and discharges the adhesive and stearate downward in turn, so that the adhesive and stearate can be discharged downward more evenly and contact the mixture of the ferrosilicon powder and the passivator below, and no local accumulation will occur, thereby accelerating the mixing efficiency of the stirring and mixing unit 3.

[0042] During use, the driving rod 15 can directly drive the lifting rod 31 to rotate inside the mixing tank body 1, and at the same time drive the stirring rods 32 on both sides to rotate through the belt transmission part 35. When the lifting rod 31 and the stirring rod 32 rotate at the same time, the spiral blades 33 on the outside of the lifting rod 31 can drive the material at the bottom to rotate outward, and the stirring blades 34 on the outside of the stirring rods 32 on both sides can stir the material when rotating, thereby increasing the dispersion of the internal material and enhancing the mixing effect. By setting up multiple scraping bars 36, the multiple scraping bars 36 rotate with the rotation of the lifting rod 31, and the multiple scraping bars 36 are all in contact with the inner bottom wall of the mixing tank body 1, so that the material on the inner bottom wall of the mixing tank body 1 is stirred accordingly, thereby enhancing the mixing effect.

[0043] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A method for preparing an iron silicon magnetic powder core, characterized in that: The following steps are involved: Step 1: Add the iron silicon powder to the passivator and mix them. The passivator is permanganate. The iron silicon powder and the permanganate are placed in a mixing device, and the mixing device is used to quickly mix and heat and dry them; Step 2: Add iron silicon powder to the binder and mix them. Put the binder into a mixing device and quickly mix the binder with the internal materials through the mixing device. Step 3: Add iron silicon powder to stearate and mix, put the stearate into a mixing device, and quickly mix the stearate with the internal materials through the mixing device; Step 4: Dry-pressing the mixed iron-silicon powder into a green magnet powder core. The iron-silicon powder mixture is taken out from the mixing device, and then pressed into a green magnet powder core by a pressing device. Step 5: Cooling the green magnetic powder core to form the green magnetic powder core. The green magnetic powder core is heated and then cooled to room temperature. The mixing device is used for rapid mixing of materials, and the mixing device comprises: A mixing tank body (1), wherein a first feed inlet (11) and a second feed inlet (12) are installed at the top of the mixing tank body (1), a discharge port (13) is installed at the bottom of the mixing tank body (1), and a drive motor (14) is fixedly installed at the top of the mixing tank body (1), a drive rod (15) is fixedly provided at the output end of the drive motor (14), and the bottom end of the drive rod (15) extends toward the interior of the mixing tank body (1); A premixing unit (2), the premixing unit (2) being arranged inside the mixing tank (1) and connected to the driving rod (15), the premixing unit (2) being capable of preliminarily mixing materials fed into the first feed port (11) and the second feed port (12) and discharging the materials downwards; A stirring and mixing unit (3), wherein the stirring and mixing unit (3) is arranged inside the mixing tank (1) and connected to the driving rod (15), and the stirring and mixing unit (3) is capable of performing secondary stirring and mixing on the material discharged from the pre-mixing unit (2).

2. The method for preparing an iron silicon magnetic powder core according to claim 1, characterized in that: The premixing unit (2) comprises: A rotating frame (21), the rotating frame (21) being rotatably disposed on the inner top of the mixing tank body (1), and a mixing bin (22), a first feeding bin (23) and a second feeding bin (24) being disposed inside the rotating frame (21), the first feeding bin (23) and the second feeding bin (24) being respectively connected to the first feeding port (11) and the second feeding port (12), and a plurality of scrapers (27) being fixedly disposed inside the mixing bin (22); A support seat (25) is fixedly arranged inside the mixing tank body (1), a rotating frame (21) and a plurality of scrapers (27) are rotatably arranged above the support seat (25), and a plurality of discharge ports (26) are opened above the support seat (25).

3. The method for preparing an iron silicon magnetic powder core according to claim 2, characterized in that: The rotating frame (21) comprises a first plate (211), a second plate (212) and a third plate (213); the third plate (213) is arranged between the first plate (211) and the second plate (212); a plurality of connecting rods (214) are fixedly connected between the first plate (211), the second plate (212) and the third plate (213); and a plurality of rotating rods (215) are fixedly installed between the first plate (211) and the driving rod (15).

4. The method for preparing an iron silicon magnetic powder core according to claim 3, characterized in that: The space between the first plate (211) and the second plate (212) forms a mixing bin (22), the space between the first plate (211) and the third plate (213) forms a second feeding bin (24), and the space between the second plate (212) and the third plate (213) forms a first feeding bin (23).

5. The method for preparing an iron silicon magnetic powder core according to claim 2, characterized in that: The stirring and mixing unit (3) comprises: A lifting rod (31), the lifting rod (31) being rotatably disposed inside the mixing tank body (1), and the top end of the lifting rod (31) passing through the support seat (25) to extend upward and be fixedly connected to the bottom end of the driving rod (15); A stirring rod (32) is rotatably disposed inside the mixing tank body (1), and a top end of the lifting rod (31) passes through the support seat (25) and extends upward, with a belt transmission member (35) being disposed between the lifting rod (31) and the top end.

6. The method for preparing an iron silicon magnetic powder core according to claim 5, characterized in that: The outer sides of the lifting rod (31) and the stirring rod (32) are respectively fixedly sleeved with a spiral blade (33) and a stirring blade (34).

7. The method for preparing an iron silicon magnetic powder core according to claim 5, characterized in that: A plurality of scraping strips (36) are fixedly arranged at the bottom end of the lifting rod (31), and the plurality of scraping strips (36) are all in contact with the inner bottom wall of the mixing tank body (1).

8. The method for preparing an iron silicon magnetic powder core according to claim 5, characterized in that: The belt transmission member (35) comprises a driving pulley and a linkage pulley, the driving pulley and the linkage pulley are respectively fixedly sleeved on the outer sides of the top ends of the lifting rod (31) and the stirring rod (32), and a transmission belt is arranged between the driving pulley and the linkage pulley for transmission.

9. An iron silicon magnetic powder core prepared by the method for preparing an iron silicon magnetic powder core according to any one of claims 1 to 8.

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