Preparation process of manganese zinc ferrite magnetic ring

Abstract

The invention belongs to the technical field of preparation of magnetic materials, particularly relates to a preparation process of a manganese zinc ferrite magnetic ring, and provides the following scheme for solving the problem that the spraying preparation quality of the magnetic ring is influenced by non-spraying points of the magnetic ring caused by dead angles possibly appearing on an inner ring of the magnetic ring due to the fact that the magnetic ring is relatively thick during spraying. Comprising the following steps: weighing raw materials: preparing the raw materials required by the magnetic ring, proportioning the raw materials of ferric oxide, manganese oxide and zinc oxide powder according to the required proportion, and presintering the raw materials through a sintering furnace; the manganese zinc ferrite magnetic ring preparation process disclosed by the invention has the effect of improving the spraying preparation quality, during spraying, the device can split the spraying of the magnetic ring, so that the two sides of the magnetic ring are respectively sprayed, and during split spraying, due to the adoption of a two-side spraying mode, the spraying quality of the magnetic ring is improved. Therefore, the thickness of the magnetic ring needing to be covered by single-side spraying is reduced, the situation that dead corners appear on the inner ring due to the fact that the magnetic ring is too thick is avoided, and the using effect of the device is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of magnetic material preparation, in particular to a manganese-zinc ferrite magnetic ring preparation process. BACKGROUND

[0002] The manganese-zinc ferrite magnetic ring is made of oxides and salts of iron, manganese and zinc, and is also manufactured by using an electronic ceramic process; the manganese-zinc ferrite magnetic ring has high magnetic permeability and can be used in occasions with a frequency range of 1 MHz to several hundred MHz, but is excepted for common mode inductors; for application occasions below 70 MHz, the impedance of the manganese-zinc material makes it the best choice; the manganese-zinc ferrite magnetic ring is generally used in a frequency range of kilohertz to megahertz.

[0003] The manganese-zinc ferrite magnetic ring can be used for manufacturing intelligent large-scale direct-current converter transformers, intelligent reactors and other transformers, rectifiers and inductors, and can also be used for manufacturing intelligent power distribution systems, power distribution switch control equipment and the like.

[0004] In the preparation of the existing manganese-zinc ferrite magnetic ring, in order to improve the durability, paint is usually sprayed on the surface of the magnetic ring; however, during the spraying, dead angles may occur in the inner circle of the magnetic ring due to the thickness of the magnetic ring, and thus un-sprayed points occur in the magnetic ring, thereby affecting the spraying preparation quality of the magnetic ring. SUMMARY

[0005] The application discloses a manganese-zinc ferrite magnetic ring preparation process, and aims to solve the technical problem that, in the background art, during spraying, dead angles may occur in the inner circle of the magnetic ring due to the thickness of the magnetic ring, and thus un-sprayed points occur in the magnetic ring, thereby affecting the spraying preparation quality of the magnetic ring.

[0006] The manganese-zinc ferrite magnetic ring preparation process provided by the application comprises the following steps: S1, raw material taking: raw materials required for preparing the magnetic ring are taken, iron oxide, manganese oxide and zinc oxide powders are proportioned according to required proportions, and the raw materials are pre-burned through a sintering furnace; S2, granulation: binders, plasticizers and defoaming agents are added into the powders, the powders are uniformly mixed to form slurry, and then the slurry is made into spherical particles with good fluidity through a spray drying tower; S3, forming: the granulated powders are put into a mold, a large full-automatic powder press is used to apply pressure, and a ring-shaped green body is pressed; S4, sintering: the green body is placed on a supporting plate and pushed into an atmosphere sintering kiln, sintering is performed at high temperature, and sampling and preliminary inspection are performed after sintering; S5, pretreatment: dust, oil stains, residual release agent and other pollutants on the surface of the magnetic ring are removed, and good adhesion of the paint film is ensured; S6, spraying: paint is sprayed on the surface of the magnetic ring through a magnetic ring spraying device, and solidification is performed after the paint is sprayed; S7, final inspection and packaging: the magnetic ring is subjected to final inspection, appearance inspection and performance test, and is packaged with anti-static and moisture-proof materials after passing the inspection, so as to avoid scratching the paint film or being damp during transportation and storage.

[0007] A manganese-zinc ferrite magnetic ring preparation process, the magnetic ring spraying equipment comprises: A base support is provided with two fixed disc seats; Two curing chambers are arranged on the base support, and the base support is provided with a fixed support; A spraying split unit is arranged on the base support and the two fixed disc seats, and the spraying split unit comprises two electric push rods and a plurality of magnetic ring adsorption seats, and the output ends of the two electric push rods are provided with outer push ring plates; A spraying anti-escape module is arranged on the fixed support, and the spraying anti-escape module comprises two escape spray chambers and two filter core chambers, and the two filter core chambers are located below the two escape spray chambers.

[0008] In a preferred scheme, the spraying split unit further comprises: Two center seats are arranged on the two fixed disc seats, and the two center seats are provided with rotating collars, and the two electric push rods are arranged on the two center seats; Two spraying turntables are arranged on the two center seats, and the two spraying turntables are located above the two fixed disc seats, and the two spraying turntables are provided with a plurality of guide grooves.

[0009] In a preferred scheme, the spraying split unit further comprises: A plurality of movable block frames are arranged in the plurality of guide grooves, and the movable block frames are provided with contraction spring rods, and one end of the contraction spring rods is arranged on the two rotating collars; Two gear rings are arranged on the two spraying turntables.

[0010] In a preferred scheme, the spraying split unit further comprises: Two servo motors are arranged on the base support, and the output shafts of the two servo motors are connected with driving gears through couplings, and the two driving gears are engaged with the two gear rings; Two mounting brackets are arranged on the two spraying turntables, and the mounting brackets are provided with negative pressure pumps; Two abutment rings are arranged on the two center seats, and the two electric push rods are located in the two abutment rings.

[0011] In a preferred scheme, the spraying splitting unit further comprises: A plurality of connecting rods, a plurality of connecting rods are respectively arranged on a plurality of movable block frames, and a plurality of the magnetic ring adsorption seats are respectively arranged on a plurality of connecting rods; A plurality of connecting pipes, a plurality of connecting pipes are respectively arranged on two negative pressure pumps, and the input ends of the plurality of connecting pipes are provided with a plurality of one-way valve connecting cavities, and the plurality of one-way valve connecting cavities are respectively arranged on a plurality of movable block frames.

[0012] In a preferred scheme, the spraying splitting unit further comprises: A plurality of negative pressure pipes, a plurality of negative pressure pipes are respectively arranged on a plurality of one-way valve connecting cavities, and the input ends of the plurality of negative pressure pipes are respectively connected with the interiors of a plurality of magnetic ring adsorption seats; A plurality of communication pipes, a plurality of communication pipes are respectively arranged on a plurality of one-way valve connecting cavities, and one end of the plurality of communication pipes is provided with a plurality of pressure recovery valves.

[0013] In a preferred scheme, the spraying anti-dispersion module further comprises: A linear guide rail, a linear guide rail is arranged on a fixed support, and a linear lead screw is arranged on the linear guide rail; A movable block seat, a movable block seat is arranged on the linear guide rail and the linear lead screw, and the movable block seat is provided with a mounting frame, and two fixing holes are formed in the mounting frame.

[0014] In a preferred scheme, the spraying anti-dispersion module further comprises: Two spraying nozzles, two spraying nozzles are respectively arranged on the inner walls of two fixing holes, two dispersion spray cavities are respectively arranged on the two spraying nozzles, and a circular hole is formed in the two dispersion spray cavities, and a contact ring is arranged on the inner walls of the two circular holes; A stepping motor, a stepping motor is arranged on the linear guide rail, and the output shaft of the stepping motor is connected with one end of the linear lead screw through a shaft coupling.

[0015] In a preferred scheme, the spraying anti-dispersion module further comprises: A paint tank, a paint tank is arranged on the mounting frame, and a delivery pump is arranged on the paint tank, the output end of the delivery pump is provided with two delivery pipes, and the output ends of the two delivery pipes are respectively connected with the input ends of the two spraying nozzles; Two air pipes, two air pipes are respectively arranged on the two dispersion spray cavities, and two filter element chambers are respectively arranged on the output ends of the two air pipes, and an exhaust pump is arranged on the two filter element chambers.

[0016] From the above, the preparation process of the manganese zinc ferrite magnetic ring provided by the application has the effect of improving the spraying preparation quality. When spraying, the device can split the spraying of the magnetic ring, so that the two sides of the magnetic ring are sprayed separately. When splitting the spraying, the thickness of the magnetic ring covered by single-side spraying is reduced due to the two-side spraying mode, so that the situation that the inner ring has a dead angle due to the excessive thickness of the magnetic ring is avoided, and the use effect of the device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A flowchart of the preparation process of the manganese zinc ferrite magnetic ring provided by the application is shown in the figure. Figure 2 A schematic diagram of the overall structure of the preparation process of the manganese zinc ferrite magnetic ring provided by the application is shown in the figure. Figure 3 A schematic diagram of the overall bottom view structure of the preparation process of the manganese zinc ferrite magnetic ring provided by the application is shown in the figure. Figure 4 A schematic diagram of the spraying splitting unit structure of the preparation process of the manganese zinc ferrite magnetic ring provided by the application is shown in the figure. Figure 5 A schematic diagram of the center seat and rotating ring splitting structure of the preparation process of the manganese zinc ferrite magnetic ring provided by the application is shown in the figure. Figure 6 A schematic diagram of the one-way valve and magnetic ring adsorption seat combined structure of the preparation process of the manganese zinc ferrite magnetic ring provided by the application is shown in the figure. Figure 7 A schematic diagram of the spraying anti-escape module structure of the preparation process of the manganese zinc ferrite magnetic ring provided by the application is shown in the figure. Figure 8 A schematic diagram of the escape spraying chamber sectional structure of the preparation process of the manganese zinc ferrite magnetic ring provided by the application is shown in the figure.

[0018] In the figure: 1, base support; 2, curing chamber; 3, spraying split unit; 301, guide groove; 302, servo motor; 303, drive gear; 304, spraying turntable; 305, negative pressure pump; 306, gear ring; 307, movable block frame; 308, abutting ring; 309, electric push rod; 310, center seat; 311, outer push ring plate; 312, mounting bracket; 313, rotating sleeve ring; 314, contraction spring rod; 315, one-way valve connecting bin; 316, connecting rod; 317, communication pipe; 318, magnetic ring adsorption seat; 319, negative pressure pipe; 320, pressure recovery valve; 321, connecting pipe; 4, spraying anti-dispersion module; 401, linear guide; 402, linear guide; 403, movable block seat; 404, mounting frame; 405, stepping motor; 406, paint tank; 407, spraying nozzle; 408, exhaust pump; 409, conveying pump; 410, conveying pipe; 411, dispersion spraying bin; 412, contact ring; 413, air pipe; 414, filter element chamber; 5, fixed support; 6, fixed disc seat. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all.

[0020] The manganese-zinc ferrite magnetic ring preparation process disclosed in the present application is mainly applied to the scene that when spraying, the inner circle of the magnetic ring may have dead angles due to the thick magnetic ring, which may cause un-sprayed points on the magnetic ring, thereby affecting the spraying preparation quality of the magnetic ring.

[0021] Referring to Figure 1 A manganese-zinc ferrite magnetic ring preparation process, comprising the following steps: S1, raw material weighing: weighing the raw materials needed for preparing the magnetic ring, and mixing the iron oxide, manganese oxide and zinc oxide powders in a required proportion, and pre-burning the raw materials in a sintering furnace; S2, granulation: adding a binder, a plasticizer and a defoaming agent to the powder, mixing uniformly to form a slurry, and then making spherical particles with good fluidity through a spray drying tower; S3, forming: placing the granulated powder into a mold, and applying pressure with a large full-automatic powder press to press into a ring-shaped green body; S4, sintering: placing the green body on a supporting plate and pushing it into an atmosphere sintering kiln for sintering at high temperature, and performing sampling and preliminary inspection after sintering; S5, pretreatment: removing contaminants such as dust, oil stains and residual release agent on the surface of the magnetic ring to ensure good adhesion of the paint film; S6, spraying: spraying paint on the surface of the magnetic ring through a magnetic ring spraying equipment, and curing after spraying paint. S7, final inspection and packaging: the magnetic ring is subjected to final inspection, appearance inspection and performance inspection, and after passing the inspection, the magnetic ring is packaged with anti-static and moisture-proof materials to avoid scratching the paint film or being damp during transportation and storage.

[0022] Referring to Figures 2-8 A manganese-zinc ferrite magnetic ring preparation process, a magnetic ring spraying device comprises: A base support 1, two fixed disc seats 6 are arranged on the base support 1; Two curing chambers 2, both of which are arranged on the base support 1, and a fixed support 5 is arranged on the base support 1; A spraying split unit 3, which is arranged on the base support 1 and the two fixed disc seats 6, comprises two electric push rods 309 and a plurality of magnetic ring adsorption seats 318, and the output ends of the two electric push rods 309 are provided with outer push ring plates 311; A spraying anti-escape module 4, which is arranged on the fixed support 5, comprises two escape spraying chambers 411 and two filter element chambers 414, and the two filter element chambers 414 are located below the two escape spraying chambers 411.

[0023] Referring to Figure 2 、 Figure 4 、 Figure 5 and Figure 6 In a preferred embodiment, the spraying split unit 3 further comprises: Two center seats 310, which are respectively arranged on the two fixed disc seats 6, and a rotating collar 313 is arranged on each of the two center seats 310, and the two electric push rods 309 are arranged on the two center seats 310; Two spraying turntables 304, which are respectively arranged on the two center seats 310, and the two spraying turntables 304 are located above the two fixed disc seats 6, and a plurality of guide grooves 301 are formed in the two spraying turntables 304.

[0024] In the present application, the spraying split unit 3 further comprises: A plurality of movable block frames 307, which are respectively arranged in the plurality of guide grooves 301, and a contraction spring rod 314 is arranged on each of the plurality of movable block frames 307, and one end of each of the plurality of contraction spring rods 314 is arranged on the two rotating collars 313; Two gear rings 306, which are respectively arranged on the two spraying turntables 304.

[0025] In the present application, the spraying split unit 3 further comprises: Two servo motors 302 are arranged on the base support 1, and the output shafts of the two servo motors 302 are connected with driving gears 303 through shaft couplings, and the two driving gears 303 are respectively engaged with two gear rings 306; Two mounting supports 312 are arranged on the two spraying turntables 304 respectively, and a negative pressure pump 305 is arranged on each mounting support 312; Two abutting rings 308 are arranged on the two center seats 310 respectively, and two electric push rods 309 are arranged inside the two abutting rings 308 respectively.

[0026] In the present application, the spraying splitting unit 3 further comprises: A plurality of connecting rods 316 are arranged on the plurality of movable block frames 307 respectively, and a plurality of magnetic ring adsorption seats 318 are arranged on the plurality of connecting rods 316 respectively. A plurality of connecting pipes 321 are arranged on the two negative pressure pumps 305 respectively, and the input ends of the plurality of connecting pipes 321 are provided with one-way valve connecting cavities 315, and the plurality of one-way valve connecting cavities 315 are arranged on the plurality of movable block frames 307 respectively.

[0027] In the present application, the spraying splitting unit 3 further comprises: A plurality of negative pressure pipes 319 are arranged on the plurality of one-way valve connecting cavities 315 respectively, and the input ends of the plurality of negative pressure pipes 319 are connected with the interiors of the plurality of magnetic ring adsorption seats 318 respectively. A plurality of communication pipes 317 are arranged on the plurality of one-way valve connecting cavities 315 respectively, and one ends of the plurality of communication pipes 317 are provided with pressure relief valves 320.

[0028] Specifically, during the preparation of spraying, the magnetic ring is arranged on the magnetic ring adsorption seat 318, at this time, the negative pressure pump 305 is operated, the negative pressure pump 305 discharges the gas in the one-way valve connecting cavity 315 through the connecting pipe 321, so that the interior is in a negative pressure state, and then the magnetic ring adsorption seat 318 adsorbs and fixes the magnetic ring through the negative pressure pipe 319, and then the servo motor 302 is operated, the servo motor 302 drives the driving gear 303 to rotate, since the driving gear 303 is engaged with the gear ring 306, the spraying turntable 304 is driven to rotate, so that the magnetic ring moves to the spraying position, so that the spraying on one side is carried out, and after spraying, primary curing is carried out in the curing cavity; After the initial curing, the magnetic ring continues to move, when moving to the designated position, the electric push rod 309 operates, the electric push rod 309 drives the outer push ring plate 311 to move, so that the outer push ring plate 311 pushes the two corresponding movable block frames 307 to move inside the guide groove 301, so that the magnetic ring is in contact with the magnetic ring adsorption seat 318 on the other spraying turntable 304, at this time the re-pressing valve 320 on the original movable block frame 307 is opened, so that the internal gas pressure of the one-way valve connected bin 315 is restored, thereby the original magnetic ring adsorption seat 318 cancels the adsorption and fixation of the magnetic ring, so that the magnetic ring is adsorbed and fixed with the magnetic ring adsorption seat 318 on the other spraying turntable 304, and moves with the other spraying turntable 304 to perform spraying on the other side, and after spraying, secondary curing is performed to complete the spraying preparation; In a specific application scenario, the spraying splitting unit 3 is suitable for manganese-zinc ferrite magnetic ring preparation spraying link, that is, the spraying splitting unit 3 can split the spraying of the magnetic ring, so that the two sides of the magnetic ring are sprayed respectively. When the spraying is split, the thickness of the magnetic ring covered by the single-side spraying is reduced due to the use of the two-side spraying, thereby avoiding the situation that the inner ring has a dead angle due to the over-thickness of the magnetic ring, ensuring the coverage effect of the paint during the spraying of the magnetic ring, avoiding the occurrence of unsprayed points on the magnetic ring, and thereby improving the spraying preparation quality of the magnetic ring. It should be noted that the inside of the one-way valve connected bin 315 is provided with a one-way valve, which can make the gas pass into the connecting pipe 321 inside in one direction when in use, so as to ensure that the inside is in a negative pressure state when needed.

[0029] Referring to Figure 2 , Figure 3 , Figure 7 and Figure 8 , in a preferred embodiment, the spraying anti-dispersion module 4 further comprises: A linear guide rail 402 is arranged on the fixed support 5, and a linear lead screw 401 is arranged on the linear guide rail 402. A movable block seat 403 is arranged on the linear guide rail 402 and the linear lead screw 401, and a mounting frame 404 is arranged on the movable block seat 403, and two fixing holes are formed in the mounting frame 404.

[0030] In the present application, the spraying anti-dispersion module 4 further comprises: Two spraying nozzles 407 are arranged on the inner walls of the two fixing holes, respectively, and two dispersion spray chambers 411 are arranged on the two spraying nozzles 407, respectively, and a circular hole is formed in each of the two dispersion spray chambers 411, and a contact ring 412 is arranged on the inner wall of each of the two circular holes. A stepping motor 405 is arranged on the linear guide rail 402, and the output shaft of the stepping motor 405 is connected to one end of the linear lead screw 401 through a shaft coupling.

[0031] In the present application, the spraying anti-dispersion module 4 further comprises: A paint tank 406 is arranged on the mounting frame 404, and a delivery pump 409 is arranged on the paint tank 406. The output end of the delivery pump 409 is provided with two delivery pipes 410, and the output ends of the two delivery pipes 410 are respectively connected to the input ends of the two spraying nozzles 407. Two air pipes 413 are respectively arranged on the two dispersion spray chambers 411, and two filter cartridge chambers 414 are respectively arranged at the output ends of the two air pipes 413. The two filter cartridge chambers 414 are respectively provided with an exhaust pump 408.

[0032] Specifically, during spraying, when the magnetic ring moves to the spraying position, the stepping motor 405 operates, the stepping motor 405 drives the linear lead screw 401 to rotate, and then the movable block seat 403 moves, and then the mounting frame 404 drives the spraying nozzle 407 to move, and then the dispersion spray chamber 411 moves, and the contact ring 412 contacts the outer wall of the magnetic ring adsorption seat 318. At this time, the side to be sprayed of the magnetic ring is located inside the dispersion spray chamber 411. Then the delivery pump 409 operates, and the delivery pump 409 delivers paint to the spraying nozzle 407 through the delivery pipe 410 to perform spraying. After spraying, the exhaust pump 408 operates, the exhaust pump 408 exhausts the gas in the dispersion spray chamber 411 through the air pipe 413, and the exhaust pump 408 processes the paint mist in the gas through the filter cartridge chamber 414. In a specific application scenario, the spraying anti-dispersion module 4 is suitable for the spraying process of manganese-zinc ferrite magnetic ring preparation, that is, the spraying anti-dispersion module 4 can limit the paint spray in a certain space during spraying to reduce the dispersion degree of the paint spray, thereby improving the working environment during the preparation of the magnetic ring, ensuring the health of workers and production safety, and improving the use effect and use safety of the device. It should be noted that while reducing dispersion, the device can discharge and process excess paint spray through the filter cartridge chamber 414 and the exhaust pump 408 to facilitate subsequent spraying, while avoiding paint mist residue dispersion, further improving safety effect.

[0033] Working principle: In the preparation of spraying, the magnetic ring is arranged on the magnetic ring adsorption seat 318, at this time the negative pressure pump 305 is operated, the negative pressure pump 305 discharges the gas in the one-way valve connecting chamber 315 through the connecting pipe 321, so that the inside is in a negative pressure state, and then the magnetic ring adsorption seat 318 is adsorbed and fixed to the magnetic ring through the negative pressure pipe 319, then the servo motor 302 is operated, the servo motor 302 drives the driving gear 303 to rotate, since the driving gear 303 is engaged with the gear ring 306, the spraying turntable 304 is driven to rotate, so that the magnetic ring moves to the spraying position, so that the spraying of one side is carried out, and after spraying, primary curing is carried out in the curing chamber. After primary curing, the magnetic ring continues to move, when moving to the specified position, the electric push rod 309 is operated, the electric push rod 309 drives the outer push ring plate 311 to move, so that the outer push ring plate 311 pushes the two corresponding movable block frames 307 to move in the guide groove 301, so that the magnetic ring is in contact with the magnetic ring adsorption seat 318 on the other spraying turntable 304, at this time the double pressure valve 320 on the original movable block frame 307 is opened, so that the gas pressure in the one-way valve connecting chamber 315 is restored, so that the original magnetic ring adsorption seat 318 cancels the adsorption and fixation of the magnetic ring, so that the magnetic ring is adsorbed and fixed with the magnetic ring adsorption seat 318 on the other spraying turntable 304, and moves with the other spraying turntable 304 to carry out the spraying of the other side, after spraying, secondary curing is carried out, so as to complete the preparation of spraying. During the spraying process, when the magnetic ring moves to the spraying position, the stepping motor 405 is operated, the stepping motor 405 drives the linear lead screw 401 to rotate, so that the movable block seat 403 moves, then the mounting frame 404 drives the spraying nozzle 407 to move, so that the escape spraying chamber 411 moves, and the contact ring 412 is in contact with the outer wall of the magnetic ring adsorption seat 318, at this time the side to be sprayed of the magnetic ring is located in the escape spraying chamber 411, then the delivery pump 409 is operated, the delivery pump 409 delivers paint into the spraying nozzle 407 through the delivery pipe 410, so as to carry out spraying. After spraying, the exhaust pump 408 is operated, the exhaust pump 408 discharges the gas in the escape spraying chamber 411 through the gas passage pipe 413, and the paint mist in the gas is treated through the filter element chamber 414.

[0034] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A process for preparing a manganese zinc ferrite magnetic ring, characterized in that, It comprises the following steps: S1, raw material taking: the raw materials required for the preparation of the magnetic ring are weighed, and the iron oxide, manganese oxide and zinc oxide powders are proportioned according to the required proportion, and the raw materials are pre-burned through a sintering furnace; S2, granulation: add adhesive, plasticizer and defoaming agent to the powder, mix uniformly to form slurry, and then pass through a spray drying tower to produce spherical particles with good fluidity; S3, molding: put the granulated powder into the mold, apply pressure with a large full-automatic powder press, and press into a ring-shaped green body; S4, sintering: place the green body on the supporting plate and push it into the atmosphere sintering kiln for sintering at high temperature, and then perform sampling and preliminary inspection after sintering; S5, pretreatment: remove dust, oil stains, residual contaminants of release agent on the surface of the magnetic ring to ensure good adhesion of the paint film; S6, spraying: spray paint on the surface of the magnetic ring through the magnetic ring spraying equipment, and then solidify after spraying paint; S7, final inspection and packaging: the magnetic ring is subjected to final inspection, appearance inspection and performance inspection, and after passing the inspection, it is packaged with anti-static and moisture-proof materials to avoid scratching the paint film or being damp during transportation and storage.

2. The process for preparing a manganese zinc ferrite magnetic ring according to claim 1, characterized in that, The magnetic ring spraying equipment comprises: a base support (1) provided with two fixed disc seats (6); two curing chambers (2) are arranged on the base support (1), and the base support (1) is provided with a fixed support (5); a spraying split unit (3) is arranged on the base support (1) and the two fixed disc seats (6), the spraying split unit (3) comprises two electric push rods (309) and a plurality of magnetic ring adsorption seats (318), and the output ends of the two electric push rods (309) are provided with outer push ring plates (311); a spraying anti-dispersion module (4) is arranged on the fixed support (5), and the spraying anti-dispersion module (4) comprises two dispersion spray chambers (411) and two filter element chambers (414), and the two filter element chambers (414) are located below the two dispersion spray chambers (411).

3. The process for preparing a manganese zinc ferrite magnetic ring according to claim 2, characterized in that, The spraying split unit (3) further comprises: two center seats (310) are arranged on the two fixed disc seats (6), and the two center seats (310) are provided with rotating sleeve rings (313), and the two electric push rods (309) are arranged on the two center seats (310); two spraying turntables (304) are arranged on the two center seats (310), and the two spraying turntables (304) are located above the two fixed disc seats (6), and the two spraying turntables (304) are provided with a plurality of guide grooves (301).

4. The process for preparing a manganese-zinc ferrite magnetic ring according to claim 3, characterized in that, The spraying split unit (3) further comprises: a plurality of movable block frames (307) are arranged in the plurality of guide grooves (301), and the plurality of movable block frames (307) are provided with contraction spring rods (314), and one end of the plurality of contraction spring rods (314) is arranged on the two rotating sleeve rings (313). Two gear rings (306) are respectively arranged on the two spraying turntables (304).

5. The process for preparing a manganese zinc ferrite magnetic ring according to claim 4, characterized in that, The spraying splitting unit (3) further comprises: Two servo motors (302) are arranged on the base support (1), and the output shafts of the two servo motors (302) are connected with driving gears (303) through couplings, and the two driving gears (303) are engaged with the two gear rings (306) respectively. Two mounting brackets (312) are arranged on the two spraying turntables (304), and negative pressure pumps (305) are arranged on the two mounting brackets (312). Two abutting rings (308) are arranged on the two center seats (310), and the two electric push rods (309) are arranged in the two abutting rings (308) respectively.

6. The process for preparing a manganese zinc ferrite magnetic ring according to claim 5, characterized in that, The spraying splitting unit (3) further comprises: A plurality of connecting rods (316) are arranged on the plurality of movable block frames (307), and a plurality of magnetic ring adsorption seats (318) are arranged on the plurality of connecting rods (316). A plurality of connecting pipes (321) are arranged on the two negative pressure pumps (305), the input ends of the plurality of connecting pipes (321) are provided with one-way valve connecting boxes (315), and the plurality of one-way valve connecting boxes (315) are arranged on the plurality of movable block frames (307).

7. The process for preparing a manganese zinc ferrite magnetic ring according to claim 6, characterized in that, The spraying splitting unit (3) further comprises: A plurality of negative pressure pipes (319) are arranged on the plurality of one-way valve connecting boxes (315), and the input ends of the plurality of negative pressure pipes (319) are connected with the interiors of the plurality of magnetic ring adsorption seats (318) respectively. A plurality of communication pipes (317) are arranged on the plurality of one-way valve connecting boxes (315), and one ends of the plurality of communication pipes (317) are provided with pressure recovery valves (320).

8. The process for preparing a manganese zinc ferrite magnetic ring according to claim 2, characterized by, The spraying anti-escape module (4) further comprises: A linear guide rail (402) is arranged on the fixed support (5), and a linear lead screw (401) is arranged on the linear guide rail (402). A movable block seat (403) is arranged on the linear guide rail (402) and the linear lead screw (401), and a mounting frame (404) is arranged on the movable block seat (403), and two fixing holes are formed in the mounting frame (404).

9. The process for preparing a manganese zinc ferrite magnetic ring according to claim 8, characterized in that, The spraying anti-escape module (4) further comprises: Two spraying nozzles (407) are arranged on the inner walls of the two fixing holes, and two escape spray chambers (411) are arranged on the two spraying nozzles (407), and circular holes are formed in the two escape spray chambers (411), and contact rings (412) are arranged on the inner walls of the two circular holes. A stepping motor (405) is arranged on the linear guide rail (402), and the output shaft of the stepping motor (405) is connected with one end of the linear lead screw (401) through a coupling.

10. The process for preparing a manganese zinc ferrite magnetic ring according to claim 9, characterized in that, The spraying anti-escape module (4) further comprises: A paint tank (406) is arranged on the mounting frame (404), and a delivery pump (409) is arranged on the paint tank (406), and the output end of the delivery pump (409) is provided with two delivery pipes (410), and the output ends of the two delivery pipes (410) are respectively connected with the input ends of two spraying nozzles (407); Two air pipes (413) are respectively arranged on the two escape spraying chambers (411), and two filter core chambers (414) are respectively arranged at the output ends of the two air pipes (413), and the two filter core chambers (414) are respectively provided with air exhaust pumps (408).

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