A preparation process for high-precision integrated inductor

Abstract

The present invention discloses a preparation process of a high-precision one-piece molded inductor, comprising the following steps: step 1, making a coil blank according to set requirements; step 2, selecting carbonyl iron powder and epoxy resin, zinc stearate and acetone according to a weight ratio of 100:4-10:15-4:2-8 and mixing them evenly, then keeping the mixture at a temperature of 70°C-80°C for 2-4 hours, and then putting the mixture into a special grinder for grinding to obtain metal powder, including a shell, the bottom of which is evenly provided with support feet, and a grinding cavity is formed inside the shell, and the grinding cavity forms a columnar cavity and a conical cavity from top to bottom. The manufacturing method of the present invention is simple in process, and the chip inductor is a new type of inductor component formed by die-casting a hollow coil into a mold and filling it with magnetic powder, and has a full-enclosed structure, no magnetic leakage, no mutual interference between devices, and the product has the advantages of small size, low loss, excellent shielding performance, high reliability, and suitable for high-density surface mounting.

Description

Technical Field

[0001] The present invention relates to the technical field of one-piece molded inductor preparation technology, and in particular to a high-precision one-piece molded inductor preparation technology. Background Art

[0002] As an important component of new electronic information materials, one-piece molded inductors are the cornerstone of the development of the information technology industry. Traditional inductors are made by winding wires on ferrite core components to form inductor components. Traditional inductor components are composed of two cores, one above and one below, and a coil. The lower core is provided with a groove for accommodating the coil, and the upper core is covered with the corresponding coil. Then, through processes such as gluing, bonding, and baking, the two cores are combined into a coating. This type of inductor component has the defects of large size, difficulty in automation, and electromagnetic leakage, which will cause vibration and noise, and will also cause increased magnetic loss, affecting the quality factor of the inductor. On the other hand, the existing process uses irregular powder shapes, easy to form ellipsoidal particles, low fine powder content, and expensive prices, which reduces the magnetic properties of the inductor and increases the cost of the inductor. Summary of the invention

[0003] The object of the present invention is to provide a preparation process of a high-precision integrated molded inductor to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a preparation process of a high-precision one-piece molded inductor, comprising the following steps:

[0005] Step 1: Make coil blanks according to set requirements;

[0006] Step 2: select carbonyl iron powder and epoxy resin, zinc stearate and acetone in a weight ratio of 100:4-10:15-4:2-8 and mix them evenly, then keep them warm at 70°C-80°C for 2-4 hours, and then put them into a special grinder for grinding to obtain metal powder.

[0007] Step 3, placing the coil blank prepared in step 1 into a mold of a laminating machine, and then injecting metal powder into the mold to cover and stamp the coil blank;

[0008] Step 4: Use a sandblasting machine to sandblast and polish the molded product in step 3;

[0009] Step 5, spraying paint on the product treated in step 4;

[0010] Step 6: Print the label according to the set requirements;

[0011] Step 7, cut off the excess sheet, bend the terminal flat against the product surface;

[0012] Step 8: Conduct electrical performance testing.

[0013] Preferably, the carbonyl iron powder in step 2 can be replaced by any one of iron silicon, iron silicon chromium, iron nickel and iron cobalt.

[0014] A special grinding machine for the preparation process of high-precision integrated molded inductor, comprising a shell, the bottom of the shell is evenly provided with supporting feet, the inside of the shell forms a grinding cavity, the grinding cavity forms a columnar cavity and a conical cavity from top to bottom, and the smallest end of the conical cavity is provided with a discharge port;

[0015] A bracket is provided at the middle position inside the conical cavity, and a lower grinding disc is fixed at the top end of the bracket extending to the bottom end of the cylindrical cavity, and an upper grinding disc is coaxially rotatably provided above the lower grinding disc, and the top of the lower grinding disc has a downwardly inclined conical surface 1, and the conical surface 1 is evenly provided with grinding teeth 1 along its circumferential direction, and a through hole is provided at the axial position of the upper grinding disc, and a downwardly inclined conical surface 2 is provided at the bottom of the upper grinding disc at the bottom end of the through hole, and the conical surface 2 is evenly provided with grinding teeth 2 along its circumferential direction, and an annular grinding interval is formed between the conical surface 2 and the conical surface 1, and the gap of the annular grinding interval gradually decreases from the center to the outside;

[0016] A feed pipe connected to the through hole is arranged at the center position of the top of the upper grinding disc along the extension direction of the through hole, and the feed pipe extends to the top of the shell. A motor is arranged on the top of the shell on one side of the feed pipe, and the output end of the motor is connected to the feed pipe through a chain mechanism;

[0017] A fixed cylinder is arranged on the top of the shell outside the feed pipe, a crushing mechanism for preliminary crushing of the material is arranged on the top of the fixed cylinder, a conical bucket is arranged at the bottom of the fixed cylinder, and the output end of the conical bucket extends to the inside of the feed pipe.

[0018] Preferably, a cover body is detachably provided on the top of the shell, and a columnar groove smaller than the columnar cavity is provided at the middle position of the bottom of the cover body.

[0019] Preferably, the upper grinding disc on the outer side of the through hole is evenly penetrated with an arc groove along its circumferential direction, an arc plug plate is slidably arranged inside the arc groove, and a slope inclined toward the center is arranged at the bottom end of the arc plug plate close to the outer ring of the upper grinding disc, connecting strips are arranged between the tops of the arc plug plates on the same radius, and balls are embedded at both ends of the top of the connecting strip, reset springs are evenly arranged between the connecting strip and the upper grinding disc, and convex strips with arc-shaped cross-sections are evenly arranged on the inner top end of the columnar groove along its circumferential direction.

[0020] Preferably, an annular seat is provided on the side wall of the columnar cavity, an annular limit interval is formed between the annular seat and the cover body, an annular positioning plate is provided on the outer side of the upper grinding disc, and the annular positioning plate extends into the annular limit interval, annular ball grooves 1 are provided on both sides of the annular positioning plate located inside the annular limit interval, annular ball grooves 2 are provided on both sides of the annular limit interval, and ball 2 is provided between annular ball grooves 1 and 2.

[0021] Preferably, the second grinding tooth and the first grinding tooth are both inclined in the same direction.

[0022] Preferably, the crushing mechanism includes a pair of crushing rollers symmetrically rotatably arranged inside a fixed cylinder and two driving motors fixed to the side walls of the fixed cylinder and connected to the output ends of the crushing rollers, wherein a feed hopper is provided on the top of the fixed cylinder, and the output end of the feed hopper extends to an upper position between the pair of crushing rollers.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The manufacturing method of the present invention has a simple process. The chip inductor is a new type of inductor component that is formed by implanting a hollow coil into a mold and filling it with magnetic powder for die casting. It has a full-enclosed structure, does not cause magnetic leakage, and does not cause mutual interference between devices. The product has the advantages of small size, low loss, excellent shielding performance, high reliability, and is suitable for high-density surface mounting.

[0025] The special grinding machine of the present invention produces a kneading effect during grinding through the cooperation between the upper grinding disc and the lower grinding disc, so that the final material is round as a whole, and the grinding teeth 1 of the conical surface 1 and the grinding teeth 2 of the conical surface 2 are both inclined in one direction, which can push the material to move outward and gradually crush the material, and the arc-shaped insert plate on the upper grinding disc rotates through the convex strip, so that the arc-shaped insert plate will move downward, and through its inclined surface, on the one hand, it can crush the material, on the other hand, it can squeeze the material to move outward, thereby improving the grinding efficiency, thereby solving the shortcomings of irregular powder shape, easy formation of ellipsoidal particles, low fine powder content, and high price. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention;

[0027] Figure 2 for Figure 1 Schematic diagram of the local structure at A;

[0028] Figure 3 for Figure 1 Schematic diagram of the local structure at B;

[0029] Figure 4It is a schematic diagram of the top view of the upper grinding disc of the present invention;

[0030] Figure 5 It is a schematic diagram of the upper grinding disc structure when viewed from above of the present invention.

[0031] In the figure: 1, shell; 2, support foot; 3, grinding chamber; 301, cylindrical chamber; 302, conical chamber; 4, discharge port; 5, bracket; 6, lower grinding disc; 7, upper grinding disc; 8, conical surface 1; 81, grinding tooth 1; 9, through hole; 10, conical surface 2; 101, grinding tooth 2; 11, annular grinding area; 12, feed pipe; 13, motor; 14, chain mechanism; 15, fixed cylinder; 16, pulverizer Structure; 161, crushing roller; 162, feed hopper; 17, conical hopper; 18, cover body; 19, columnar groove; 20, arc groove; 21, arc plug plate; 22, inclined surface; 23, connecting strip; 24, ball one; 25, return spring; 26, convex strip; 27, annular seat; 28, annular limit interval; 29, annular positioning plate; 30, annular ball groove one; 31, annular ball groove two; 32, ball two. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0033] Example 1, please refer to Figure 1-5 , a preparation process of a high-precision one-piece molded inductor, comprising the following steps:

[0034] Step 1: Make coil blanks according to set requirements;

[0035] Step 2: Select carbonyl iron powder and mix it evenly with epoxy resin, zinc stearate and acetone in a weight ratio of 100:5:6:6, keep it warm at 70°C for 4 hours, and then put it into a special grinder for grinding to obtain metal powder.

[0036] Step 3, placing the coil blank prepared in step 1 into a mold of a laminating machine, and then injecting metal powder into the mold to cover and stamp the coil blank;

[0037] Step 4: Use a sandblasting machine to sandblast and polish the molded product in step 3;

[0038] Step 5, spraying paint on the product treated in step 4;

[0039] Step 6: Print the label according to the set requirements;

[0040] Step 7, cut off the excess sheet, bend the terminal flat against the product surface;

[0041] Step 8: Conduct electrical performance testing.

[0042] A special grinding machine for the preparation process of high-precision integrated molded inductor, comprising a housing 1, the bottom of the housing 1 is evenly provided with supporting feet 2, the interior of the housing 1 forms a grinding chamber 3, the grinding chamber 3 forms a columnar cavity 301 and a conical cavity 302 from top to bottom, and a discharge port 4 is provided on the smallest end of the conical cavity 302;

[0043] A bracket 5 is provided at the middle position inside the conical cavity 302, and a lower grinding disc 6 is fixed at the top end of the bracket 5 extending to the bottom end inside the cylindrical cavity 301, and an upper grinding disc 7 is coaxially rotatably provided above the lower grinding disc 6, and the top of the lower grinding disc 6 has a downwardly inclined conical surface 18, and the conical surface 18 is evenly provided with grinding teeth 181 along its circumferential direction, and a through hole 9 is provided at the axial position of the upper grinding disc 7, and a downwardly inclined conical surface 2 10 is provided at the bottom of the upper grinding disc 7 at the bottom end of the through hole 9, and the conical surface 2 10 is evenly provided with grinding teeth 2 101 along its circumferential direction, and an annular grinding interval 11 is formed between the conical surface 2 10 and the conical surface 18, and the gap of the annular grinding interval 11 gradually decreases from the center to the outside;

[0044] A feed pipe 12 connected to the through hole 9 is provided at the center of the top of the upper grinding disc 7 along the extending direction of the through hole 9, and the feed pipe 12 extends to the top of the shell 1. A motor 13 is provided at the top of the shell 1 on one side of the feed pipe 12, and the output end of the motor 13 is connected to the feed pipe 12 through a chain mechanism 14.

[0045] A fixed cylinder 15 is arranged at the top of the shell body 1 outside the feed pipe 12, a crushing mechanism 16 for preliminary crushing of the material is arranged at the top inside the fixed cylinder 15, a conical bucket 17 is arranged at the bottom end inside the fixed cylinder 15, and the output end of the conical bucket 17 extends to the inside of the feed pipe 12.

[0046] In this embodiment, a cover body 18 is detachably provided on the top of the housing 1 , and a columnar groove 19 smaller than the columnar cavity 301 is provided at the middle position of the bottom of the cover body 18 .

[0047] In this embodiment, the upper grinding disc 7 outside the through hole 9 is evenly penetrated with an arc groove 20 along its circumferential direction, and an arc plug plate 21 is slidably arranged inside the arc groove 20. The bottom end of the arc plug plate 21 is close to the outer ring of the upper grinding disc 7 and is provided with an inclined surface 22 inclined toward the center. A connecting strip 23 is arranged between the tops of the arc plug plates 21 on the same radius, and both ends of the top of the connecting strip 23 are embedded with ball bearings 24. Reset springs 25 are evenly arranged between the connecting strip 23 and the upper grinding disc 7, and the inner top of the columnar groove 19 is evenly provided with a convex strip 26 with an arc-shaped cross-section along its circumferential direction.

[0048] In this embodiment, an annular seat 27 is provided on the side wall of the columnar cavity 301, and an annular limit interval 28 is formed between the annular seat 27 and the cover body 18. An annular positioning plate 29 is provided on the outer side of the upper grinding disc 7, and the annular positioning plate 29 extends to the inside of the annular limit interval 28. Annular ball grooves 1 30 are provided on both sides of the annular positioning plate 29 located inside the annular limit interval 28, annular ball grooves 2 31 are provided on both sides of the annular limit interval 28, and ball 2 32 is provided between the annular ball grooves 1 30 and the annular ball grooves 2 31.

[0049] In this embodiment, the second grinding tooth 101 and the first grinding tooth 81 are both inclined in the same direction.

[0050] In this embodiment, the crushing mechanism 16 includes a pair of crushing rollers 161 symmetrically rotatably arranged inside the fixed cylinder 15 and two driving motors fixed on the side walls of the fixed cylinder 15 and connected to the output ends of the crushing rollers 161, wherein a feed hopper 162 is provided at the top of the fixed cylinder 15, and the output end of the feed hopper 162 extends to an upper position between the pair of crushing rollers 161.

[0051] Embodiment 2, a process for preparing a high-precision integrally formed inductor, comprising the following steps:

[0052] Step 1: Make coil blanks according to set requirements;

[0053] Step 2: Select carbonyl iron powder and mix it evenly with epoxy resin, zinc stearate and acetone in a weight ratio of 100:10:10:8, keep it warm at 80° C. for 3 hours, and then grind it in a special grinder to obtain metal powder.

[0054] Step 3, placing the coil blank prepared in step 1 into a mold of a laminating machine, and then injecting metal powder into the mold to cover and stamp the coil blank;

[0055] Step 4: Use a sandblasting machine to sandblast and polish the molded product in step 3;

[0056] Step 5, spraying paint on the product treated in step 4;

[0057] Step 6: Print the label according to the set requirements;

[0058] Step 7, cut off the excess sheet, bend the terminal flat against the product surface;

[0059] Step 8: Conduct electrical performance testing.

[0060] A special grinding machine for the preparation process of high-precision integrated molded inductor, comprising a housing 1, the bottom of the housing 1 is evenly provided with supporting feet 2, the interior of the housing 1 forms a grinding chamber 3, the grinding chamber 3 forms a columnar cavity 301 and a conical cavity 302 from top to bottom, and a discharge port 4 is provided on the smallest end of the conical cavity 302;

[0061] A bracket 5 is provided at the middle position inside the conical cavity 302, and a lower grinding disc 6 is fixed at the top end of the bracket 5 extending to the bottom end inside the cylindrical cavity 301, and an upper grinding disc 7 is coaxially rotatably provided above the lower grinding disc 6, and the top of the lower grinding disc 6 has a downwardly inclined conical surface 18, and the conical surface 18 is evenly provided with grinding teeth 181 along its circumferential direction, and a through hole 9 is provided at the axial position of the upper grinding disc 7, and a downwardly inclined conical surface 2 10 is provided at the bottom of the upper grinding disc 7 at the bottom end of the through hole 9, and the conical surface 2 10 is evenly provided with grinding teeth 2 101 along its circumferential direction, and an annular grinding interval 11 is formed between the conical surface 2 10 and the conical surface 18, and the gap of the annular grinding interval 11 gradually decreases from the center to the outside;

[0062] A feed pipe 12 connected to the through hole 9 is provided at the center of the top of the upper grinding disc 7 along the extending direction of the through hole 9, and the feed pipe 12 extends to the top of the shell 1. A motor 13 is provided at the top of the shell 1 on one side of the feed pipe 12, and the output end of the motor 13 is connected to the feed pipe 12 through a chain mechanism 14.

[0063] A fixed cylinder 15 is arranged at the top of the shell body 1 outside the feed pipe 12, a crushing mechanism 16 for preliminary crushing of the material is arranged at the top inside the fixed cylinder 15, a conical bucket 17 is arranged at the bottom end inside the fixed cylinder 15, and the output end of the conical bucket 17 extends to the inside of the feed pipe 12.

[0064] In this embodiment, a cover body 18 is detachably provided on the top of the housing 1 , and a columnar groove 19 smaller than the columnar cavity 301 is provided at the middle position of the bottom of the cover body 18 .

[0065] In this embodiment, the upper grinding disc 7 outside the through hole 9 is evenly penetrated with an arc groove 20 along its circumferential direction, and an arc plug plate 21 is slidably arranged inside the arc groove 20. The bottom end of the arc plug plate 21 is close to the outer ring of the upper grinding disc 7 and is provided with an inclined surface 22 inclined toward the center. A connecting strip 23 is arranged between the tops of the arc plug plates 21 on the same radius, and both ends of the top of the connecting strip 23 are embedded with ball bearings 24. Reset springs 25 are evenly arranged between the connecting strip 23 and the upper grinding disc 7, and the inner top of the columnar groove 19 is evenly provided with a convex strip 26 with an arc-shaped cross-section along its circumferential direction.

[0066] In this embodiment, an annular seat 27 is provided on the side wall of the columnar cavity 301, and an annular limit interval 28 is formed between the annular seat 27 and the cover body 18. An annular positioning plate 29 is provided on the outer side of the upper grinding disc 7, and the annular positioning plate 29 extends to the inside of the annular limit interval 28. Annular ball grooves 1 30 are provided on both sides of the annular positioning plate 29 located inside the annular limit interval 28, annular ball grooves 2 31 are provided on both sides of the annular limit interval 28, and ball 2 32 is provided between the annular ball grooves 1 30 and the annular ball grooves 2 31.

[0067] In this embodiment, the second grinding tooth 101 and the first grinding tooth 81 are both inclined in the same direction.

[0068] In this embodiment, the crushing mechanism 16 includes a pair of crushing rollers 161 symmetrically rotatably arranged inside the fixed cylinder 15 and two driving motors fixed on the side walls of the fixed cylinder 15 and connected to the output ends of the crushing rollers 161, wherein a feed hopper 162 is provided at the top of the fixed cylinder 15, and the output end of the feed hopper 162 extends to an upper position between the pair of crushing rollers 161.

[0069] Example 3: The difference between Example 3 and Example 1 is that in step 2, the carbonyl iron powder is replaced by ferrosilicon.

[0070] Example 4: The difference between Example 4 and Example 1 is that in step 2, the carbonyl iron powder is replaced by iron silicon chromium.

[0071] Example 5: The difference between Example 5 and Example 1 is that in step 2, the carbonyl iron powder is replaced by iron nickel.

[0072] The working process of the above-mentioned special grinding machine is as follows: the material passes through the feed hopper 162 and enters between a pair of crushing rollers 161, and the driving motor drives the pair of crushing rollers 161 to rotate relative to each other, and the material is initially crushed. After crushing, the material falls into the conical bucket 17 and enters the feed pipe 12 through its output end, and then enters the annular grinding area 11 between the upper grinding disc 7 and the lower grinding disc 6 through the through hole 9. At this time, the motor 13 drives the feed pipe 12 to rotate through the chain mechanism 14, thereby rotating the upper grinding disc 7 to grind the material. During the grinding process, the grinding teeth 1 81 of the conical surface 1 8 and the grinding teeth 2 101 of the conical surface 2 10 are both inclined in one direction, which can push the material to move outward and gradually crush the material. During the crushing, since the upper grinding disc 7 keeps rotating and cooperates with the lower grinding disc 6, a similar The material is rubbed like a kneading effect, so that the material is round as a whole. During the rotation of the upper grinding disc 7, the arc-shaped insert plate 21 is acted upon by the return spring 25 between the connecting strip 23 and the upper grinding disc 7, so that the ball 24 of the connecting strip 23 always contacts the top of the columnar groove 19 of the cover body 18. Since the inner top of the columnar groove 19 is evenly provided with convex strips 26 with arc-shaped cross-sections along its circumferential direction, the arc-shaped insert plate 21 will move downward when the ball 24 of the connecting strip 23 moves to the position of the convex strip 26. The inclined surface 22 provided at the bottom of the arc-shaped insert plate 21 can crush the material on the one hand, and squeeze the material to move outward on the other hand, thereby improving the grinding efficiency. Finally, the ground material is discharged from the edge of the lower grinding disc 6, falls into the inside of the conical cavity 302, and then discharged from the discharge port 4 to obtain fine spherical metal powder.

[0073] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A special grinding machine for the preparation process of high-precision integrated inductor, characterized in that: The grinding machine comprises a housing (1), the bottom of the housing (1) is evenly provided with supporting feet (2), the interior of the housing (1) forms a grinding chamber (3), the grinding chamber (3) forms a columnar chamber (301) and a conical chamber (302) from top to bottom, and a discharge port (4) is provided at the smallest end of the conical chamber (302); A bracket (5) is arranged at a middle position inside the conical cavity (302), and a lower grinding disc (6) is fixedly arranged at the top end of the bracket (5) extending to the bottom end inside the cylindrical cavity (301), and an upper grinding disc (7) is arranged coaxially above the lower grinding disc (6), and the top of the lower grinding disc (6) has a downwardly inclined conical surface (8), and the conical surface (8) is evenly provided with grinding teeth (81) along its circumferential direction, and a through hole (9) is arranged at the axial center position of the upper grinding disc (7), and a downwardly inclined conical surface (10) is arranged at the bottom of the upper grinding disc (7) at the bottom end of the through hole (9), and the conical surface (10) is evenly provided with grinding teeth (101) along its circumferential direction, and an annular grinding area (11) is formed between the conical surface (10) and the conical surface (8), and the gap of the annular grinding area (11) gradually decreases from the center to the outside; A feed pipe (12) connected to the through hole (9) is provided at the center position of the top of the upper grinding disc (7) along the extension direction of the through hole (9), the feed pipe (12) extending to the top of the shell (1), a motor (13) is provided at the top of the shell (1) on one side of the feed pipe (12), and the output end of the motor (13) is connected to the feed pipe (12) via a chain mechanism (14); A fixed cylinder (15) is arranged at the top of the shell (1) outside the feed pipe (12); a pulverizing mechanism (16) for preliminary pulverizing of materials is arranged at the top of the fixed cylinder (15); a conical bucket (17) is arranged at the bottom of the fixed cylinder (15); and an output end of the conical bucket (17) extends into the feed pipe (12); The top of the housing (1) is detachably provided with a cover body (18), and a columnar groove (19) smaller than the columnar cavity (301) is provided at the middle position of the bottom of the cover body (18); The upper grinding disc (7) outside the through hole (9) is evenly penetrated with an arc groove (20) along its circumferential direction, an arc plug plate (21) is slidably arranged inside the arc groove (20), and a slope (22) inclined toward the center is arranged at the bottom end of the arc plug plate (21) close to the outer ring of the upper grinding disc (7), a connecting strip (23) is arranged between the tops of the arc plug plates (21) on the same radius, and both ends of the top of the connecting strip (23) are embedded with ball bearings (24), and a return spring (25) is evenly arranged between the connecting strip (23) and the upper grinding disc (7), and a convex strip (26) with an arc-shaped cross section is evenly arranged at the top of the inner top of the columnar groove (19) along its circumferential direction; The second grinding tooth (101) and the first grinding tooth (81) are both inclined in the same direction; The preparation process of high-precision one-piece molded inductor includes the following steps: Step 1: Make coil blanks according to set requirements; Step 2, carbonyl iron powder is selected and mixed with epoxy resin, zinc stearate and acetone in a weight ratio of 100:4-10:15-4:2-8, and then kept warm at 70°C-80°C for 2-4 hours, and then put into a special grinder for grinding to obtain metal powder; Step 3, placing the coil blank prepared in step 1 into a mold of a laminating machine, and then injecting metal powder into the mold to cover and stamp the coil blank; Step 4: Use a sandblasting machine to sandblast and polish the molded product in step 3; Step 5, spraying paint on the product treated in step 4; Step 6: Print the label according to the set requirements; Step 7: Cut off the excess sheet and bend the terminal flat against the product surface; Step 8: Conduct electrical performance test.

2. The special grinding machine for the preparation process of a high-precision integrated molded inductor according to claim 1, characterized in that: The carbonyl iron powder in step 2 can be replaced by any one of iron silicon, iron silicon chromium, iron nickel and iron cobalt.

3. The special grinding machine for the preparation process of a high-precision integrated molded inductor according to claim 1, characterized in that: The side wall of the columnar cavity (301) is provided with an annular seat (27), an annular limiting interval (28) is formed between the annular seat (27) and the cover body (18), an annular positioning plate (29) is provided on the upper outer side of the upper grinding disc (7), and the annular positioning plate (29) extends into the annular limiting interval (28), annular ball grooves (30) are provided on both sides of the annular positioning plate (29) located inside the annular limiting interval (28), annular ball grooves (31) are provided on both sides of the annular limiting interval (28), and a second ball groove (32) is provided between the first annular ball groove (30) and the second annular ball groove (31).

4. The special grinding machine for the preparation process of a high-precision integrated molded inductor according to claim 1, characterized in that: The pulverizing mechanism (16) comprises a pair of pulverizing rollers (161) symmetrically rotatably arranged inside a fixed cylinder (15) and two drive motors fixed to the side walls of the fixed cylinder (15) and connected to the output ends of the pulverizing rollers (161), wherein a feed hopper (162) is provided at the top of the fixed cylinder (15), and the output end of the feed hopper (162) extends to a position above between the pair of pulverizing rollers (161).

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