CN115036117A - Production process of annular inductor - Google Patents
Production process of annular inductor Download PDFInfo
- Publication number
- CN115036117A CN115036117A CN202210539828.9A CN202210539828A CN115036117A CN 115036117 A CN115036117 A CN 115036117A CN 202210539828 A CN202210539828 A CN 202210539828A CN 115036117 A CN115036117 A CN 115036117A
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- wire
- magnetic ring
- drying
- winding
- inductor
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 238000004804 winding Methods 0.000 claims abstract description 37
- 238000005476 soldering Methods 0.000 claims abstract description 23
- 238000005520 cutting process Methods 0.000 claims abstract description 13
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000012360 testing method Methods 0.000 claims abstract description 12
- 238000007605 air drying Methods 0.000 claims abstract description 6
- 238000005470 impregnation Methods 0.000 claims description 25
- 238000001035 drying Methods 0.000 claims description 22
- 239000003292 glue Substances 0.000 claims description 16
- 239000002966 varnish Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 239000003822 epoxy resin Substances 0.000 claims description 8
- 229920000647 polyepoxide Polymers 0.000 claims description 8
- 239000003085 diluting agent Substances 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 5
- 238000005491 wire drawing Methods 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 3
- 239000003973 paint Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 abstract description 3
- 230000001771 impaired effect Effects 0.000 abstract 1
- 238000002791 soaking Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 238000003466 welding Methods 0.000 description 9
- 239000010410 layer Substances 0.000 description 6
- 230000004907 flux Effects 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- H01F41/005—Impregnating or encapsulating
-
- 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
- H01F41/02—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 for manufacturing cores, coils, or magnets
- H01F41/04—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 for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/06—Coil winding
- H01F41/08—Winding conductors onto closed formers or cores, e.g. threading conductors through toroidal cores
-
- 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
- H01F41/02—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 for manufacturing cores, coils, or magnets
- H01F41/04—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 for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/12—Insulating of windings
- H01F41/127—Encapsulating or impregnating
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
The invention discloses a production process of a ring-shaped inductor, which comprises the following steps: the wire winding, contain and soak, the stoving, the separated time, the foot of cutting, hang the base, the line is pulled out, the point is glued, soldering tin, electrical test, earlier wrap the wire rod on the surface of magnetic core through automatic coil winding machine, treat to wrap around the package and accomplish the back, wrap up on magnetic ring and wire rod completely with the mixture of standing water and thinner again, thereby the effectual impaired and the appearance of gas pocket of avoiding appearing on the surface of wire rod, and drip the air-drying type insulating oil according to the product surface on the product that contains the completion of soaking, dry again, thereby further protection is carried out to the wire rod, thereby improve its yields.
Description
Technical Field
The invention relates to the technical field of annular inductor production, in particular to a production process of an annular inductor.
Background
Toroidal inductors, a widely used inductor, derive many types, such as magnetic loop inductors, coil inductors, etc., and the symmetry and closed magnetic path provided by the core shape results in minimal magnetic flux leakage from the device.
However, in the existing annular inductor, an enameled film on the surface of an enameled copper wire is damaged or has a pinhole phenomenon in the winding process, so that the yield is reduced; not only increases the cost, but also is difficult to meet the customer requirements.
Disclosure of Invention
The invention aims to provide a production process of a ring-shaped inductor, which comprises the steps of firstly wrapping a wire on the surface of a magnetic core through an automatic winding machine, and then completely wrapping the magnetic core and the wire with a mixture of varnish and a diluent after the wrapping is finished, so that the surface of the wire is effectively prevented from being damaged and air holes are effectively prevented from being generated, and air-drying insulating oil is dripped on a product after impregnation according to the surface of the product and then dried, so that the wire is further protected, and the yield of the wire is improved.
The purpose of the invention can be realized by the following technical scheme:
a production process of a ring-shaped inductor comprises the following steps:
step one, winding: inspecting the wire rods and the magnetic core, selecting an automatic winding machine with a corresponding specification according to the size of the magnetic core, respectively placing the two wire rods into a wire cover and penetrating the wire cover onto a wire arranging shaft of the automatic winding machine, placing the magnetic core into a vibration disc, and winding the wire rods on the surface of the magnetic core through the automatic winding machine to obtain a winding coil;
step two, impregnation: preparing an impregnation solution according to the specification of the winding coil, pouring the impregnation solution into an impregnation tank, placing the winding coil through a basket, and attaching a layer of impregnation solution on the surface of the winding coil to form insulating paint;
step three, drying: placing the impregnated product on a tray, dripping air-drying insulating oil on the surface of the tray, drying the tray after 5-20 minutes, and completely curing the oil film;
step four, branching: fixing the magnetic ring, straightening the outer layer wire at the right end to the left side along the outer edge of the magnetic ring, classifying two ends of one wire, turning over the magnetic ring, straightening the outer layer wire at the tail end of the right side to the left side along the outer edge of the magnetic ring, and classifying two ends of the other wire;
step five, cutting feet: putting the wound magnetic ring into a pin cutting die, pressing the magnetic ring tightly, starting the pin cutting die, and cutting off the wire on the base;
step six, hanging a base: aligning the base with the magnetic ring, and then winding the classified wire rods from the PIN of the inner edge ring along the guide groove of the base, so as to obtain the inductance of the magnetic ring;
step seven, wire drawing: inserting four pins of a magnetic ring inductor into four pin grooves in a fixed mould, fixing the magnetic ring inductor, placing the fixed mould with the magnetic ring inductor on a limiting mould of an automatic wire arranging machine, and pulling out redundant wires through the automatic wire arranging machine;
step eight, dispensing: fixing the magnetic ring inductor after the wire is pulled out, extruding fixing glue at the positions of the pins to be glued, and drying the fixing glue;
step nine, soldering tin: vertically placing the dispensed magnetic ring inductor on a soldering tin jig, adjusting the liquid level of the soldering flux and the height of a soldering tin machine, and then soldering the pins through the soldering tin machine;
step ten, electrical property testing: the inductance and resistance test is carried out on two pins of the wire through the inductance tester, then the energization test is carried out on the pins of two different wires through the model withstand voltage tester until the display time of the withstand voltage tester is 0s or the specified test time, and then each pin is tested through the inductance tester.
As a further scheme of the invention: and the impregnation solution in the second step is formed by mixing varnish and a diluent in a volume ratio of 1:2-2.1, and the specific gravity of the varnish in the impregnation solution is 0.85-0.89.
As a further scheme of the invention: the drying temperature in the third step is 110-120 ℃, and the drying time is 60-90 min.
As a further scheme of the invention: and after two wires in the fourth step are classified, one crossing point of the wires in the middle of the magnetic ring is arranged.
As a further scheme of the invention: and in the sixth step, the number of winding turns of the wire rod is 0.7-2.
As a further scheme of the invention: and step eight, mixing the epoxy resin A glue and the epoxy resin B glue with the fixing glue ratio of 5:1 under a sealing condition to obtain the epoxy resin adhesive.
As a further scheme of the invention: and the drying temperature in the step eight is 100 ℃, and the drying time is 40 min.
As a further scheme of the invention: the soldering temperature in the ninth step is 390-440 ℃, and the soldering time is 1-4 s.
The invention has the beneficial effects that: the wire rod is wrapped on the surface of the magnetic core through the automatic winding machine, after the wrapping is finished, the mixture of the varnish and the diluent is completely wrapped on the magnetic ring and the wire rod, so that the damage and the air holes on the surface of the wire rod are effectively avoided, air-drying insulating oil is dripped on the impregnated product according to the surface of the product, and then the drying is carried out, so that the wire rod is further protected, and the yield of the impregnated product is improved.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic flow diagram of the process of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention is a process for manufacturing a toroidal inductor, comprising the following steps:
step one, winding: inspecting the wire rods and the magnetic core, selecting an automatic winding machine with a corresponding specification according to the size of the magnetic core, respectively placing the two wire rods into a wire cover and penetrating the wire cover onto a wire arranging shaft of the automatic winding machine, placing the magnetic core into a vibration disc, and winding the wire rods on the surface of the magnetic core through the automatic winding machine to obtain a winding coil;
step two, impregnation: preparing an impregnation solution according to the specification of the winding coil, pouring the impregnation solution into an impregnation tank, placing the winding coil through a basket, and attaching a layer of impregnation solution on the surface of the winding coil to form insulating paint;
step three, drying: placing the impregnated product on a tray, dripping air-drying insulating oil on the surface of the tray, drying the tray after 5-20 minutes, and completely curing the oil film;
step four, branching: fixing the magnetic ring, straightening the outer layer wire at the right end to the left side along the outer edge of the magnetic ring, classifying two ends of one wire, turning over the magnetic ring, straightening the outer layer wire at the tail end of the right side to the left side along the outer edge of the magnetic ring, and classifying two ends of the other wire;
step five, cutting feet: putting the wound magnetic ring into a pin cutting die, pressing the magnetic ring tightly, starting the pin cutting die, and cutting off the wire on the base;
step six, hanging a base: aligning the base with the magnetic ring, and then winding the classified wire rods from the PIN of the inner edge ring along the guide groove of the base, so as to obtain the inductance of the magnetic ring;
step seven, wire drawing: inserting four pins of a magnetic ring inductor into four pin grooves in a fixed mould, fixing the magnetic ring inductor, placing the fixed mould with the magnetic ring inductor on a limiting mould of an automatic wire arranging machine, and pulling out redundant wires through the automatic wire arranging machine;
step eight, dispensing: fixing the magnetic ring inductor after wire drawing, extruding fixing glue at the positions of the pins to be glued, and drying the fixing glue;
step nine, tin immersion: vertically placing the magnetic ring inductor subjected to dispensing on a soldering tin jig, adjusting the liquid level of the soldering flux and the height of a soldering tin machine, and then soldering the pins through the soldering tin machine;
step ten, electrical property testing: the method comprises the steps of conducting inductance test with the electrifying time of 0.3-2s on two pins of a wire material through an inductance tester with the model number of LCR Meter 1063A, conducting electrifying test on the pins of two different wire materials through a voltage-resistant tester with the model number of CS2670A-1 until the display time of the voltage-resistant tester is 0s or specified test time, wherein the specified test time is manually set, and then testing each pin through an inductance tester with the model number of ZX1085 BX.
And in the first step, whether the wire is knotted or not and whether the surface of the wire is oxidized or not are checked, whether the magnetic core is a magnetic ring coating layer on the surface of the magnetic core falls off or not is checked, and the tail wire length of the wire is 3cm after winding is finished.
The impregnation solution in the second step is formed by mixing varnish and a diluent in a volume ratio of 1:2-2.1, the specific gravity of the varnish in the impregnation solution is 0.85-0.89, and the impregnation time is 8-12 minutes.
The preparation method of the impregnation solution comprises the following steps:
s1: pouring varnish into an impregnation disc, pouring a diluent into the varnish for multiple times, and uniformly stirring the varnish with a volume ratio not more than 10% each time;
s2: pouring the matched varnish into a proper amount of measuring cylinder, putting the densimeter into the measuring cylinder, and observing the proportion when the densimeter is static and suspended.
The drying temperature in the third step is 110-120 ℃, and the drying time is 60-90 min.
In the invention, in the second step and the third step, the pins are wrapped by using the adhesive tape so as to prevent the pins from being stained with insulating oil.
And after two wires in the fourth step are classified, the cross point of the wires in the middle of the magnetic ring is one.
The number of winding turns of the wire in the sixth step is determined according to the thickness of the wire, and is generally 0.7-2 turns
And step eight, epoxy resin A glue and epoxy resin B glue with the fixing glue ratio of 5:1 are mixed under a sealing condition to prepare the epoxy resin adhesive, and the drying temperature is 100 ℃, and the drying time is 40 min.
The type of the soldering flux in the ninth step is EC-19S-8, the soldering flux is diluted according to a ratio of 1:1 by a diluent with the type of #4520, the soldering temperature is 390-440 ℃, and the welding time is 1-4S, wherein the welding temperature of the enameled wire with the wire diameter of 0.1-0.5 is 390-410 ℃, and the welding time is 1-2S; the welding temperature of the enameled wire with the wire diameter of 0.55-1.1 is 400-420 ℃, and the welding time is 2-3 s; the welding temperature of the insulated wire with the wire diameter of 0.1-0.5 is 410-430 ℃, and the welding time is 2-3 s; the welding temperature of the insulated wire with the wire diameter of 0.55-1.1 is 420-440 ℃, and the welding time is 3-4 s.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (8)
1. The production process of the annular inductor is characterized by comprising the following steps of:
step one, winding: checking the wire rods and the magnetic core, respectively placing the two wire rods into a wire cover and penetrating the wire cover onto a wire arranging shaft of an automatic winding machine, placing the magnetic core into a vibration disc, and winding the wire rods on the surface of the magnetic core through the automatic winding machine to obtain a winding coil;
step two, impregnation: preparing an impregnation solution according to the specification of the winding coil, pouring the impregnation solution into an impregnation tank, placing the winding coil through a basket, and attaching a layer of impregnation solution on the surface of the winding coil to form insulating paint;
step three, drying: placing the impregnated product on a tray, dripping air-drying insulating oil on the surface of the tray, drying the tray after 5-20 minutes, and completely curing the oil film;
step four, branching: fixing the magnetic ring, straightening the outer layer wire at the right end to the left side along the outer edge of the magnetic ring, classifying two ends of one wire, turning over the magnetic ring, straightening the outer layer wire at the tail end of the right side to the left side along the outer edge of the magnetic ring, and classifying two ends of the other wire;
step five, cutting feet: putting the wound magnetic ring into a pin cutting die, pressing the magnetic ring tightly, starting the pin cutting die, and cutting off the wire on the base;
step six, hanging a base: aligning the base with the magnetic ring, and then winding the classified wire rods from the PIN of the inner edge ring along the guide groove of the base, so as to obtain the inductance of the magnetic ring;
step seven, wire drawing: inserting four pins of the magnetic ring inductor into four pin grooves in a fixed mould, then placing the fixed mould provided with the magnetic ring inductor on a limiting mould of an automatic wire arranging machine, and pulling out the redundant wires through the automatic wire arranging machine;
step eight, dispensing: fixing the magnetic ring inductor after wire drawing, extruding fixing glue at the positions of the pins to be glued, and drying the fixing glue;
step nine, soldering tin: vertically placing the magnetic ring inductor subjected to glue dispensing on a soldering tin jig, and then soldering the pins through a soldering tin machine;
step ten, electrical property testing: the pins that are wires are tested by a tester.
2. The process for producing a toroidal inductor according to claim 1, wherein the impregnation solution in the second step is formed by mixing varnish and a diluent in a volume ratio of 1:2-2.1, and the specific gravity of varnish in the impregnation solution is 0.85-0.89.
3. The process for producing a toroidal inductor according to claim 1, wherein the drying temperature in the third step is 110 ℃ to 120 ℃ and the drying time is 60 min to 90 min.
4. The process for producing a toroidal inductor as claimed in claim 1, wherein in the fourth step, after two wires are classified, there is one crossing point of the wires at the middle of the magnetic ring.
5. The process for producing a toroidal inductor according to claim 1, wherein in said sixth step, the number of turns of the wire is 0.7-2.
6. The production process of the annular inductor according to claim 1, wherein the fixing glue in the step eight is prepared by mixing epoxy resin A glue and epoxy resin B glue in a ratio of 5:1 under a sealing condition.
7. The process for producing a toroidal inductor according to claim 1, wherein the drying temperature in step eight is 100 ℃ and the drying time is 40 min.
8. The process for producing a toroidal inductor according to claim 1, wherein said soldering temperature in step nine is 390 ℃ -440 ℃, and the soldering time period is 1-4 s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210539828.9A CN115036117A (en) | 2022-05-17 | 2022-05-17 | Production process of annular inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210539828.9A CN115036117A (en) | 2022-05-17 | 2022-05-17 | Production process of annular inductor |
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| Publication Number | Publication Date |
|---|---|
| CN115036117A true CN115036117A (en) | 2022-09-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210539828.9A Pending CN115036117A (en) | 2022-05-17 | 2022-05-17 | Production process of annular inductor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117773255A (en) * | 2024-01-02 | 2024-03-29 | 湖南奇力新电子科技有限公司 | Tin shrinkage welding process for crescent notch of silver wire at NR inductor end |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007012845A (en) * | 2005-06-30 | 2007-01-18 | Toko Inc | Air-core coil winding machine and its wiring method |
| CN107180698A (en) * | 2016-03-10 | 2017-09-19 | 清流伊科电子科技有限公司 | A kind of epoxy I-shaped inductance manufacture craft |
| CN109755013A (en) * | 2019-01-25 | 2019-05-14 | 河南中汇致简电子科技有限公司 | A kind of common mode inductance manufacturing process |
| CN112435827A (en) * | 2020-11-13 | 2021-03-02 | 临沂昱通新能源科技有限公司 | Structure of high-impedance PFC inductor and processing technology thereof |
| CN213424829U (en) * | 2020-11-16 | 2021-06-11 | 萍乡市程品科技有限公司 | Winding machine with varnish impregnation function |
-
2022
- 2022-05-17 CN CN202210539828.9A patent/CN115036117A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007012845A (en) * | 2005-06-30 | 2007-01-18 | Toko Inc | Air-core coil winding machine and its wiring method |
| CN107180698A (en) * | 2016-03-10 | 2017-09-19 | 清流伊科电子科技有限公司 | A kind of epoxy I-shaped inductance manufacture craft |
| CN109755013A (en) * | 2019-01-25 | 2019-05-14 | 河南中汇致简电子科技有限公司 | A kind of common mode inductance manufacturing process |
| CN112435827A (en) * | 2020-11-13 | 2021-03-02 | 临沂昱通新能源科技有限公司 | Structure of high-impedance PFC inductor and processing technology thereof |
| CN213424829U (en) * | 2020-11-16 | 2021-06-11 | 萍乡市程品科技有限公司 | Winding machine with varnish impregnation function |
Non-Patent Citations (1)
| Title |
|---|
| 金守仁等: "《机械工业部继电器专业技术培训教材继电器及装置装配工艺学》", 《继电器行业学会组编》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117773255A (en) * | 2024-01-02 | 2024-03-29 | 湖南奇力新电子科技有限公司 | Tin shrinkage welding process for crescent notch of silver wire at NR inductor end |
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Application publication date: 20220909 |
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