CN117393290A - Manufacturing method of side shielding inductor - Google Patents
Manufacturing method of side shielding inductor Download PDFInfo
- Publication number
- CN117393290A CN117393290A CN202310774052.3A CN202310774052A CN117393290A CN 117393290 A CN117393290 A CN 117393290A CN 202310774052 A CN202310774052 A CN 202310774052A CN 117393290 A CN117393290 A CN 117393290A
- Authority
- CN
- China
- Prior art keywords
- bottom plate
- flat coil
- adopting
- cover plate
- inductor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 238000002360 preparation method Methods 0.000 claims abstract description 10
- 238000004804 winding Methods 0.000 claims abstract description 9
- 239000003822 epoxy resin Substances 0.000 claims abstract description 8
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 8
- 239000000696 magnetic material Substances 0.000 claims abstract description 3
- 239000000047 product Substances 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 11
- 239000006247 magnetic powder Substances 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 238000000465 moulding Methods 0.000 claims description 8
- 239000011265 semifinished product Substances 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000004962 Polyamide-imide Substances 0.000 claims description 3
- 238000000498 ball milling Methods 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000013530 defoamer Substances 0.000 claims description 3
- 239000002270 dispersing agent Substances 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 239000011812 mixed powder Substances 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 229920002312 polyamide-imide Polymers 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 238000005245 sintering Methods 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 238000005498 polishing Methods 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 238000007654 immersion Methods 0.000 claims 1
- 239000011162 core material Substances 0.000 description 3
- 238000005488 sandblasting Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000003064 anti-oxidating effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 229910001004 magnetic alloy Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/085—Cooling by ambient air
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
The invention discloses a manufacturing method of a side shielding inductor, which comprises the following steps: preparing a bottom plate and a cover plate by adopting soft magnetic materials, arranging a groove for placing a flat coil in the bottom plate and a magnetic core arranged in the middle of the groove, and arranging a square frame on one side of the bottom plate; step two, preparing a flat coil, and winding the flat coil; step three, assembling a product: and assembling the prepared bottom plate, the prepared cover plate and the flat coil, putting the flat coil into a groove on the bottom plate, leading out a leading-out end of the flat coil from a hole at the bottom of the side surface of the groove, and mounting the cover plate on the bottom plate by adopting epoxy resin to finish the preparation. The power inductor prepared by the invention is an assembled inductor, has simple production process, full shielding at the inductor, strong electromagnetic interference resistance and weak electromagnetic interference resistance, and the side cover covers other modules of a customer, so that the interference intensity of the internal module to the external environment can be effectively reduced. And the cover plate can protect the internal module, so that the reliability of the product can be improved.
Description
Technical Field
The invention relates to a manufacturing method of a side shielding inductor, and belongs to the technical field of power inductors.
Background
The existing power inductor does not have electromagnetic shielding characteristics, does not resist electromagnetic interference, does not have good anti-EMI characteristics, or only has the anti-EMI characteristics, and cannot carry out electromagnetic shielding on other products. In addition, the cover plate has stronger heat conductivity and high strength, can effectively protect internal electronic components, and can enhance heat dissipation.
Disclosure of Invention
The invention aims to solve the technical problems that: a method for manufacturing a side shielding inductor is provided to solve the problems in the prior art.
The technical scheme adopted by the invention is as follows: a method for manufacturing a side shield inductor, the method comprising the steps of:
preparing a bottom plate and a cover plate by adopting soft magnetic materials, arranging a groove for placing a flat coil in the bottom plate and a magnetic core arranged in the middle of the groove, and arranging a square frame on one side of the bottom plate;
step two, preparing a flat coil, and winding the flat coil;
step three, assembling a product: and assembling the prepared bottom plate, the prepared cover plate and the flat coil, putting the flat coil into a groove on the bottom plate, leading out the leading-out end of the flat coil from an opening at the bottom of the side surface of the groove, and mounting the cover plate on the bottom plate by adopting epoxy resin to complete the preparation of the full-shielding assembled power inductor.
Further, the preparation method of the bottom plate or the cover plate in the first step comprises the following steps: ball milling soft magnetic powder by adopting a ball mill, then sending the soft magnetic powder into a rotary furnace, presintering the soft magnetic powder for 3-5h at 945-955 ℃, sanding the powder by adopting a sand mill for 85-95min after presintering, adding PVA solvent, defoamer and dispersant into the sanded mixed powder by adopting a spraying tower, mixing to obtain wet material, spraying and granulating the wet material at an inlet 355 ℃ and an outlet temperature 155 ℃, pressing and molding the powder by adopting a molding machine under 290+/-10 Mpa after granulating to obtain a base plate or cover plate coarse product, and sintering the base plate or cover plate coarse product for 4h at 1360-1390 ℃ by adopting a nitrogen furnace after molding.
Further, the preparation method of the flat coil in the second step comprises the following steps: adopting self-adhesive polyamide imide enameled flat copper wires with temperature resistance grade above 220 ℃, and winding hollow coils with corresponding turns by a winding machine at the temperature of a hot air gun of 520-580 ℃ according to the turn number requirements.
Further, the assembling method in the third step is as follows: after material preparation of the inductor is completed, the flat coil and the bottom plate are assembled, the leading-out end of the flat coil is led out through the opening, the cover plate and the bottom plate are assembled by adopting epoxy resin, baking is carried out at 150 ℃ after assembly, an assembled semi-finished product is obtained, the electrode leading-out end of the assembled semi-finished product is subjected to dip soldering after being polished by adopting a grinding wheel, and then angle folding is carried out, so that the electrode is folded at the bottom of the bottom plate.
The invention has the beneficial effects that: compared with the prior art, the power inductor prepared by the invention is sealed by adopting the cover plate and the bottom plate of the magnetic core material, the production process is simple, the inductance part is fully shielded, the electromagnetic interference resistance is strong, the electromagnetic interference is weak, the side square frame and the cover plate cover other modules on the circuit board, the interference intensity of the internal modules to the external environment can be effectively reduced, the square frame and the cover plate can protect the internal modules, the reliability of the product can be improved, the bottom of the side is provided with the lead-out electrode, the end part of the electrode is co-high with the bottom surface of the bottom plate, the lead-out is convenient, the lead-out is co-high with the bottom, and the power tile is more compact.
The bottom plate and the cover plate formed by soft magnetic powder (magnetic alloy powder and the like) are adopted for assembly, the inductance body is provided with an electromagnetic shielding outer side face, the magnetic bottom plate and the magnetic cover plate shield other electronic components, and under the condition of an external magnetic field, the bottom plate and the cover plate can form an electromagnetic shielding cover to weaken the influence of the external magnetic field. In addition, the bottom plate and the cover plate have stronger heat conductivity and high strength, can effectively protect internal electronic components, and can enhance heat dissipation.
Drawings
Fig. 1 is a schematic perspective view of the present invention (cover plate open state);
FIG. 2 is a schematic diagram of the front view of the present invention;
FIG. 3 is a schematic view of the cross-sectional structure A-A in FIG. 2.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific examples.
Example 1: as shown in fig. 1-3, a method for manufacturing a side shielding inductor, the method comprises the following steps:
firstly, preparing a bottom plate 2 and a cover plate 3, wherein soft magnetic powder is adopted, ball milling is carried out on the soft magnetic powder by adopting a ball mill to uniformly mix the powder and refine crystal grains, the soft magnetic powder is sent into a rotary furnace, and presintering is carried out for 3-5h at 945-955 ℃ for reducing shrinkage rate in subsequent sintering so as to reduce deformation. And (3) after presintering, sanding the powder by adopting a sand mill for 85-95min to form refined and homogenized powder, then adopting a spraying tower, adding PVA solvent, defoamer and dispersing agent into the sanded mixed powder, and carrying out spray granulation on the wet material mixed by adopting the conditions of an inlet 355 ℃ and an outlet temperature 155 ℃. After granulation, the powder is pressed and molded by a molding machine under the condition of 290+/-10 Mpa to obtain a coarse product of the bottom plate 2 or the cover plate 3, the bottom plate is molded into a groove 5 and a square frame 7 on one side, wherein an opening 4 and a magnetic core 6 arranged in the middle are arranged on the side surface of the groove 5, and after molding, a nitrogen furnace is adopted to sinter for 4 hours at 1360-1390 ℃ to obtain the product of the bottom plate 2 or the cover plate 3. The sintered product is subjected to sand blasting by a sand blasting machine to remove burrs of the product, a sand blasting semi-finished product is obtained, epoxy resin paint is sprayed to increase the anti-oxidation performance of the product, and finally the appearance size and the electrical performance of the product are inspected to obtain a finished product of the bottom plate 2 or the cover plate 3;
step two, preparing a self-adhesive flat hollow coil 1 for preparing the flat coil, adopting self-adhesive polyamide imide enameled flat copper wires with the temperature resistance level of more than 220 ℃, and winding the hollow coil with corresponding turns according to the turn number requirement by a winding machine at the temperature of a hot air gun of 520-580 ℃;
step three, product assembly, after material preparation of the inductor is completed, the flat coil 1 with the self-adhesive function is placed into the groove 5 of the bottom plate 2 for assembly, the leading-out end of the flat coil 1 is led out through the opening 4 and is not higher than the bottom surface of the bottom plate, the cover plate 3 and the bottom plate 2 are assembled by epoxy resin, and then baking is carried out at 150 ℃ (the epoxy resin fills the groove and contacts with the cover plate, and plays a role of adhesion and fixation), so that an assembled semi-finished product is obtained, such as a three-dimensional structure schematic diagram in fig. 1. And (3) polishing an electrode leading-out end of the assembled semi-finished product by adopting a grinding wheel, then carrying out tin dipping, then carrying out corner folding, folding the electrode at the bottom of the bottom plate 2, and then carrying out appearance size and electrical property testing to obtain the finished product.
The foregoing is merely illustrative of the present invention, and the scope of the present invention is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the scope of the present invention, and therefore, the scope of the present invention shall be defined by the scope of the appended claims.
Claims (4)
1. A manufacturing method of a side shielding inductor is characterized by comprising the following steps: the method comprises the following steps:
preparing a bottom plate and a cover plate by adopting soft magnetic materials, arranging a groove for placing a flat coil in the bottom plate and a magnetic core arranged in the middle of the groove, and arranging a square frame on one side of the bottom plate;
step two, preparing a flat coil, and winding the flat coil;
step three, assembling a product: and assembling the prepared bottom plate, the cover plate and the flat coil, putting the flat coil into a groove on the bottom plate, leading out the leading-out end of the flat coil from an opening at the bottom of the side surface of the groove, mounting the cover plate on the bottom plate by adopting epoxy resin, covering the square frame by the cover plate, and thus, completing the preparation of the full-shielding assembled power inductor.
2. The method for manufacturing the side shielding inductor according to claim 1, wherein: the preparation method of the bottom plate or the cover plate in the first step comprises the following steps: ball milling soft magnetic powder by adopting a ball mill, then sending the soft magnetic powder into a rotary furnace, presintering the soft magnetic powder for 3-5h at 945-955 ℃, sanding the powder by adopting a sand mill for 85-95min after presintering, adding PVA solvent, defoamer and dispersant into the sanded mixed powder by adopting a spraying tower, mixing to obtain wet material, spraying and granulating the wet material at an inlet 355 ℃ and an outlet temperature 155 ℃, pressing and molding the powder by adopting a molding machine under 290+/-10 Mpa after granulating to obtain a base plate or cover plate coarse product, and sintering the base plate or cover plate coarse product for 4h at 1360-1390 ℃ by adopting a nitrogen furnace after molding.
3. A method for manufacturing a side shield inductor according to claim 1 or 2, characterized in that: the preparation method of the flat coil in the second step comprises the following steps: adopting self-adhesive polyamide imide enameled flat copper wires with temperature resistance grade of more than 220 ℃, and winding hollow coils with corresponding turns by a winding machine at the temperature of 500-600 ℃ of a hot air gun according to the turn number requirement.
4. A method for manufacturing a side shield inductor according to claim 1 or 2, characterized in that: the assembling method in the third step is as follows: after material preparation of the inductor is completed, bonding and assembling the flat coil and the bottom plate, leading out the leading-out end of the flat coil through the opening, assembling the cover plate and the bottom plate by adopting epoxy resin, baking at 150 ℃ after assembling to obtain an assembled semi-finished product, polishing the electrode leading-out end of the assembled semi-finished product by adopting a grinding wheel, carrying out tin immersion, folding the angle, and folding the electrode at the bottom of the bottom plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310774052.3A CN117393290A (en) | 2023-06-28 | 2023-06-28 | Manufacturing method of side shielding inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310774052.3A CN117393290A (en) | 2023-06-28 | 2023-06-28 | Manufacturing method of side shielding inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117393290A true CN117393290A (en) | 2024-01-12 |
Family
ID=89467311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310774052.3A Pending CN117393290A (en) | 2023-06-28 | 2023-06-28 | Manufacturing method of side shielding inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117393290A (en) |
-
2023
- 2023-06-28 CN CN202310774052.3A patent/CN117393290A/en active Pending
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