CN115410814B - Sintering device for manganese zinc ferrite magnetic powder - Google Patents
Sintering device for manganese zinc ferrite magnetic powder Download PDFInfo
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- CN115410814B CN115410814B CN202210929661.7A CN202210929661A CN115410814B CN 115410814 B CN115410814 B CN 115410814B CN 202210929661 A CN202210929661 A CN 202210929661A CN 115410814 B CN115410814 B CN 115410814B
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- 238000005245 sintering Methods 0.000 title claims abstract description 290
- JIYIUPFAJUGHNL-UHFFFAOYSA-N [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] JIYIUPFAJUGHNL-UHFFFAOYSA-N 0.000 title claims abstract description 61
- 229910001289 Manganese-zinc ferrite Inorganic materials 0.000 title claims abstract description 60
- 239000006247 magnetic powder Substances 0.000 title claims abstract description 58
- 230000000712 assembly Effects 0.000 claims abstract description 12
- 238000000429 assembly Methods 0.000 claims abstract description 12
- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 96
- 238000007789 sealing Methods 0.000 claims description 89
- 229910052757 nitrogen Inorganic materials 0.000 claims description 38
- 238000003860 storage Methods 0.000 claims description 33
- 230000035515 penetration Effects 0.000 claims description 16
- 230000000149 penetrating effect Effects 0.000 claims description 15
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 238000003491 array Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 18
- 230000008569 process Effects 0.000 abstract description 15
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 239000000463 material Substances 0.000 abstract description 6
- LNRYQGINUXUWLV-UHFFFAOYSA-N [Mn].[Fe].[Zn] Chemical compound [Mn].[Fe].[Zn] LNRYQGINUXUWLV-UHFFFAOYSA-N 0.000 abstract description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 20
- 238000005485 electric heating Methods 0.000 description 10
- 230000001276 controlling effect Effects 0.000 description 6
- 238000009792 diffusion process Methods 0.000 description 6
- 230000000737 periodic effect Effects 0.000 description 6
- 239000000428 dust Substances 0.000 description 3
- 239000012774 insulation material Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000010425 asbestos Substances 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 239000004964 aerogel Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/64—Burning or sintering processes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/34—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
- H01F1/342—Oxides
- H01F1/344—Ferrites, e.g. having a cubic spinel structure (X2+O)(Y23+O3), e.g. magnetite Fe3O4
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Power Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Magnetic Ceramics (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention is applicable to the technical field of manganese zinc iron materials, and provides a sintering device for manganese zinc ferrite magnetic powder, which comprises a sintering box body, wherein a plurality of multi-piece sintering assemblies are arranged in the sintering box body; the multi-piece sintering assembly comprises a plurality of pieces of sintering bodies and a plurality of pieces of feeding bodies; the multiple feeding bodies are in power transmission connection with the driving assembly, the multiple sintering bodies are provided with multiple sintering boxes, and the multiple sintering boxes are composed of multiple unit sintering boxes; a plurality of unit feed trays which are distributed at equal intervals are arranged on the plurality of feed bodies; in the process of driving and switching through the driving component, a plurality of unit feed trays are switched into different corresponding unit sintering boxes with stable sintering condition environments, so that the sintering conditions are updated in place in time, the sintering condition matching accuracy is high, and the advantages of timely updating the sintering conditions in place, simplicity in operation, high manufacturing efficiency and the like are achieved.
Description
Technical Field
The invention relates to the technical field of manganese zinc iron materials, in particular to a sintering device of manganese zinc ferrite magnetic powder.
Background
The soft magnetic Mn-Zn ferrite material has high magnetic permeability, low coercive force, low power loss and other physical and chemical characteristics, and is mainly used for manufacturing high-frequency transformers, inductors, recording magnetic heads, noise filters and the like.
The sintering step is involved in the preparation process of the manganese zinc ferrite magnetic powder, and the method (CN 105503169B) for reducing the sintering temperature of the manganese zinc ferrite powder can be detailed reference to the sintering step, which is invented by the non-Sn Bell magnetic material limited company, and the like, wherein the specific method comprises the steps of firstly coarsely crushing the pre-sintered sheet material, then carrying out wet sanding and the like to prepare the powder; granulating, humidifying, forming and sintering the powder particles to obtain manganese zinc ferrite and the like, wherein the sintering step is included;
for a detailed procedure for specific sintering reference is made to a method for producing manganese-zinc-ferrite cores (CN 104392837B) invented by the company of the magnetic materials of the south China; the mentioned sintering temperature is raised, the sintering temperature is kept and the sintering temperature is lowered; the sintering temperature rise and sintering temperature preservation step involves controlling the entering amount speed of nitrogen, and the sintering temperature rise and sintering temperature reduction step involves gradual temperature rise and gradual temperature reduction.
In the prior art, the large-volume sintering equipment has the problems that the efficiency is low on one hand and the manufacturing failure and the accuracy are low because the sintering condition is not updated in place on the other hand because the space is mostly provided with a diffusion process in the process of controlling the entering amount speed of nitrogen or gradually controlling the temperature; the small-volume sintering equipment can solve the problems, but has small single operation amount, so that the problem of low manufacturing efficiency is caused; that is, the prior art cannot combine large-volume sintering equipment and small-volume sintering equipment, and has the advantages of timely updating sintering conditions, simplicity in operation, high manufacturing efficiency and the like.
Disclosure of Invention
(one) solving the technical problems
The embodiment of the invention aims to provide a sintering device for manganese zinc ferrite magnetic powder, and aims to solve the problems that the prior art cannot combine large-volume sintering equipment with small-volume sintering equipment, and has the advantages of timely sintering condition updating, simplicity in operation, high manufacturing efficiency and the like.
(II) technical scheme
Specific: the sintering device for the manganese zinc ferrite magnetic powder comprises a sintering box body, wherein a filling lining body is filled in the sintering box body, a plurality of sintering cavities distributed in a plurality of rows and columns are formed in the filling lining body, and a plurality of sintering assemblies used for independently sintering the semi-finished manganese zinc ferrite magnetic powder in a plurality of spaces are arranged in the sintering cavities; the multiple sintering components are composed of multiple sintering bodies and multiple feeding bodies movably inserted on the multiple sintering bodies; the power transmission of the multiple feeding bodies is connected to the driving assembly, and the penetration positions of the multiple feeding bodies on the multiple sintering bodies are adjusted by using the driving assembly;
wherein, the plurality of sintering bodies are provided with a plurality of sintering boxes and a fixing frame arranged on the plurality of sintering boxes; the plurality of sintering boxes are composed of a plurality of unit sintering boxes which are distributed at equal intervals; the unit sintering boxes are used for independently setting sintering conditions in multiple spaces to independently sinter the semi-finished manganese zinc ferrite magnetic powder; the multiple feeding bodies are provided with a plurality of unit feeding trays which are distributed at equal intervals and are used for matching with independent sintering conditions of multiple spaces of the multiple unit sintering boxes.
In the scheme of the sintering device for the manganese zinc ferrite magnetic powder, the sintering box body is arranged on a bottom plate through a mounting plate, and a plurality of supporting feet are arranged at the bottom of the bottom plate and used for supporting; the ends at the two ends of the sintering box body are respectively provided with a sealing door; an operation table is arranged on a bottom plate positioned at the side edge of the sintering box body, and the operation table is utilized to adjust and control independent sintering conditions of a plurality of corresponding spaces of the unit sintering boxes; a plurality of nitrogen supply tanks are arranged on the bottom plate at the side edge of the sintering box body and used for respectively providing nitrogen.
In the scheme of the sintering device for the manganese zinc ferrite magnetic powder, a plurality of feeding bodies are provided with supporting plankers, and a plurality of unit feeding discs are detachably arranged on the supporting plankers at equal intervals; a plurality of limiting holes are formed at the end heads at the two ends of the support carriage and are used for being assembled with the driving assembly; the driving assembly consists of a screw rod and a nut, the screw rod is driven by a motor to rotate, and the screw rod and the nut are matched in a threaded transmission manner to drive the nut to move so as to drive the support carriage and the unit feed tray to move.
In the scheme of the sintering device for the manganese zinc ferrite magnetic powder, a plurality of unit sintering boxes which are distributed at equal intervals are detachably arranged on a fixing frame; the unit sintering box consists of a sealing support seat and a lifting sealing cap movably inserted on the sealing support seat; the unit feeding disc is movably inserted on the sealing support seat; wherein the fixing frame and the lifting sealing cap are detachably installed and are separated from the sealing support seat; a lifting structure is arranged on the fixing frame; the lifting structure is utilized to lift, and the lifting sealing cap is driven by the fixing frame to movably insert and adjust on the sealing support seat.
In a further scheme of the invention, a fixed cross beam is arranged on the fixed frame and is fixedly connected with the lifting structure; a plurality of fixed columns which are distributed at equal intervals are fixed on one side wall of the fixed cross beam, and a connecting plate is fixed at one end of the fixed column far away from the fixed cross beam; the connecting plate is detachably connected to the lifting sealing cap.
In a further scheme of the invention, a through cavity which is vertically penetrated is formed in the sealing support seat, and a side chute is formed at the bottom of the side wall in the through cavity; the sealing support seat is provided with two parallel shallow storage side cavities and two parallel deep storage side cavities; the shallow storage side cavity and the deep storage side cavity are vertical; the deep storage side cavity is vertically communicated; the side sliding grooves are distributed in parallel with the shallow accommodating side cavities; the bottom of the sealing support seat is provided with penetrating gaps which are distributed in parallel with the deep storage side cavity.
In the optimized scheme of the invention, the lifting sealing cap is provided with the supporting top, and the supporting top is fixedly provided with two long penetrating sealing plates which are distributed in parallel and correspondingly and movably penetrated in the deep storage side cavity; two short penetration sealing plates which are distributed in parallel are fixed on the supporting top, and the short penetration sealing plates are correspondingly penetrated in the shallow containing side cavity in a movable manner.
In the re-optimization scheme of the invention, a storage tank is arranged on the unit feed tray and is used for placing semi-finished manganese zinc ferrite magnetic powder; the side walls of the unit feed trays at the two sides of the storage tank are fixedly provided with side convex edges which are used for being movably inserted into the side sliding tank;
the unit feed trays positioned at the front end and the rear end of the storage tank are provided with limiting seal grooves; the long penetration sealing plate is correspondingly matched with the limit sealing groove to be penetrated.
In a further scheme of the invention, a pipeline collecting pipe is arranged on the lifting sealing cap and is fixed through a reinforcing ring; the pipeline collecting pipe is connected to the sintering condition adjusting structure, and the sintering condition adjusting structure is arranged inside the lifting sealing cap.
In the optimization scheme of the invention, the sintering condition adjusting structure is provided with a fixed plate; two sintering condition adjusting discs are arranged on the sintering condition adjusting structure and symmetrically distributed relative to the fixed plate; a sintering condition adjusting net is arranged in the sintering condition adjusting disc;
the sintering condition adjusting net consists of a plurality of mutually-crossed sintering condition adjusting rods; the sintering condition adjusting rod is internally provided with a nitrogen supply cavity for conveying nitrogen, the side wall of the sintering condition adjusting rod is provided with a plurality of nitrogen supply holes distributed in an array, and the nitrogen supply holes are communicated with the nitrogen supply cavity; the height of the nitrogen supply hole at the air outlet far from one end of the nitrogen supply cavity is set to be larger than the height of the nitrogen supply hole at the air inlet near one end of the nitrogen supply cavity;
furthermore, the height of the nitrogen supply hole at the air outlet far from one end of the nitrogen supply cavity is larger than the height of the nitrogen supply hole at the air inlet near one end of the nitrogen supply cavity, so that the nitrogen supply hole is inclined to provide nitrogen upwards, and the problems that dust is easily raised due to the fact that semi-finished manganese zinc ferrite magnetic powder is easily blown up by filling nitrogen under a small-space unit sintering box, and the unit feeding disc leaks out in the process of switching into different stable sintering condition environments, so that the yield is affected are avoided; the sintering stability of the manganese zinc ferrite magnetic powder is improved;
an electric heating plate is arranged at the bottom of the sintering condition adjusting rod, and an electric heating wire is paved on the electric heating plate and used for regulating and controlling the temperature inside the unit sintering box; a cable and a nitrogen conveying pipe are inserted into the pipeline collecting pipe, the cable is connected to the electric heating plate, and the nitrogen conveying pipe is communicated with the inside of the nitrogen supply cavity;
the fixed plate is fixed with a telescopic adjusting sleeve, and is fixed on the lifting sealing cap through the telescopic adjusting sleeve; the inside of the telescopic adjusting sleeve is driven to stretch by an air cylinder telescopic rod, and the telescopic adjusting sleeve is made of a heat insulation material;
the periodic lifting adjustment of the sintering condition adjusting net is realized through the periodic driving expansion of the cylinder expansion link, the sintering condition inside the unit sintering box is regulated and controlled by the accelerating sintering condition adjusting net, the process of setting the sintering condition to have a certain diffusion is shortened, and the sintering efficiency is improved.
(III) beneficial effects
Compared with the prior art, the sintering device of the manganese zinc ferrite magnetic powder comprises:
1. dispersing and placing the semi-finished manganese zinc ferrite magnetic powder on a plurality of unit feed trays which are arranged on a plurality of feed bodies and distributed at equal intervals, and matching with independent sintering conditions of a plurality of spaces of a plurality of unit sintering boxes to independently sinter the semi-finished manganese zinc ferrite magnetic powder; the driving force provided by the driving component is utilized to drive the plurality of unit feed trays and the placed semi-finished manganese zinc ferrite magnetic powder to move on the plurality of sintered bodies together to adjust the penetration position, so that the matching of the switching and the independent sintering conditions of a plurality of spaces of the plurality of unit sintering boxes is realized, and the device has the advantages of simplicity in operation, high manufacturing efficiency and the like; meanwhile, as the sintering conditions are independently set in the multiple spaces of the unit sintering boxes to independently sinter the semi-finished manganese zinc ferrite magnetic powder, in the process of driving and switching through the driving assembly, the unit feeding plates are switched into different corresponding unit sintering boxes with stable sintering condition environments, so that the sintering conditions are updated in place in time, the accuracy of matching the sintering conditions is high, and the advantages of being capable of simultaneously updating the sintering conditions in place in time, being easy to operate, high in manufacturing efficiency and the like are achieved;
2. a plurality of sintering cavities distributed in a multi-row multi-column array are matched with a plurality of corresponding multi-piece sintering assemblies, so that a large number of semi-finished manganese zinc ferrite magnetic powder can be synchronously processed, and the yield is improved; and the driving assembly drives the switching to enter different stable sintering condition environments, so that the process of resetting the sintering condition to have a diffusion is avoided, and the sintering efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of a sintering apparatus for manganese zinc ferrite magnetic powder according to the present invention;
FIG. 2 is a schematic view of the seal door of FIG. 1 with the seal door removed;
FIG. 3 is a schematic structural view of a plurality of sintered components in a sintering apparatus for manganese zinc ferrite magnetic powder according to the present invention;
FIG. 4 is a schematic view of the structure of the multiple feed bodies in FIG. 3;
FIG. 5 is a schematic view of the unit feed tray of FIG. 4;
FIG. 6 is a schematic view of the structure of the multi-piece sintered body of FIG. 3;
FIG. 7 is a schematic view showing the structure of the unit sintering box of FIG. 6;
FIG. 8 is a schematic view of the elevating seal cap of FIG. 7;
FIG. 9 is a schematic view of the lifting seal cap of FIG. 8 after being flipped over;
FIG. 10 is a schematic structural view of the sintering condition adjustment structure of FIG. 9;
FIG. 11 is a schematic view showing a transverse cross-sectional structure of a sintering condition adjusting rod in a sintering apparatus of manganese zinc ferrite magnetic powder of the present invention;
fig. 12 is a schematic structural view of the seal support of fig. 7.
In the reference numerals:
a sintering box body 1, a sealing door 2, a mounting plate 3, a bottom plate 4, supporting feet 5, an operating table 6 and a nitrogen supply tank 7;
filling the inner lining 11, the sintering cavity 12 and the multiple sintering assemblies 13;
a plurality of sintered bodies 131, a plurality of feed bodies 132;
a plurality of sintering boxes 1311, a fixed frame 1312, a unit sintering box 1313;
a unit feed tray 1321, a limiting hole 1322, and a support carriage 1323;
a fixed column 13121, a fixed cross beam 13122, a web 13123;
a lifting seal cap 13131, a seal support 13132;
a storage slot 13211, a side flange 13212, a limit seal slot 13213;
a line header 131311, a support top 131312, a short interposed seal plate 131313, a long interposed seal plate 131314, a reinforcing ring 131315, and a sintering condition adjustment structure 131316;
a shallow receiving side chamber 131321, a deep receiving side chamber 131322, and a side slip groove 131324 inserted through the notch 131323;
a sintering condition adjusting net 1313161, a sintering condition adjusting disk 1313162, a telescopic adjusting sleeve 1313163, a fixing plate 1313164, nitrogen gas supply holes 1313165, and an electric heating plate 1313166.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Specific implementations of the invention are described in detail below in connection with specific embodiments.
In an embodiment of the present invention, as shown in fig. 1 to 7: the sintering device for the manganese zinc ferrite magnetic powder comprises a sintering box body 1, wherein a filling lining body 11 is filled in the sintering box body 1, a plurality of sintering cavities 12 distributed in a plurality of rows and arrays are formed in the filling lining body 11, and a plurality of sintering assemblies 13 used for independently sintering the semi-finished manganese zinc ferrite magnetic powder in multiple spaces are arranged in the sintering cavities 12;
further, the semi-finished manganese zinc ferrite magnetic powder is scattered and placed on a plurality of sintering assemblies 13, the plurality of sintering assemblies 13 are used for conveying the semi-finished manganese zinc ferrite magnetic powder into a sintering cavity 12, and a sintering box body 1 is started to perform multi-space independent sintering on the semi-finished manganese zinc ferrite magnetic powder;
meanwhile, the filling lining body 11 is paved with a heat insulation material layer inside the sintering cavity 12, so as to avoid the mutual influence of the sintering conditions independently arranged inside each sintering cavity 12 which is independently distributed; the heat insulating material of the heat insulating material layer specifically includes glass fiber, asbestos, rock wool, silicate, aerogel felt, vacuum plate, etc., and the specific material is not limited, so long as the material can satisfy the sintering conditions for avoiding the mutually independent setting inside each sintering cavity 12, and the asbestos is preferably used here;
the multi-piece sintered assembly 13 is composed of a plurality of pieces of sintered bodies 131 and a plurality of pieces of feeding bodies 132 movably inserted on the plurality of pieces of sintered bodies 131; the multiple feeding bodies 132 are connected to the driving assembly in a power transmission manner, and the penetration positions of the multiple feeding bodies 132 on the multiple sintering bodies 131 are adjusted by using the driving assembly;
furthermore, the semi-finished manganese zinc ferrite magnetic powder is independently and dispersedly placed on the plurality of feeding bodies 132, the driving assembly is started, the driving force provided by the driving assembly is utilized to drive the plurality of feeding bodies 132 and the penetration positions of the semi-finished manganese zinc ferrite magnetic powder which is independently and dispersedly placed on the plurality of sintering bodies 131, so that the multi-space independent sintering of the semi-finished manganese zinc ferrite magnetic powder is realized;
wherein, the plurality of sintering bodies 131 are provided with a plurality of sintering boxes 1311 and a fixing frame 1312 arranged on the plurality of sintering boxes 1311; the multiple sintering boxes 1311 are composed of a plurality of unit sintering boxes 1313 distributed at equal intervals; the unit sintering boxes 1313 are used for independently setting sintering conditions in multiple spaces to independently sinter the semi-finished manganese zinc ferrite magnetic powder;
the plurality of feeder blocks 132 are provided with a plurality of unit feeder trays 1321 distributed at equal intervals for matching independent sintering conditions in a plurality of spaces of the plurality of unit sintering boxes 1313.
The semi-finished manganese zinc ferrite magnetic powder is dispersed and placed on a plurality of unit feed trays 1321 which are arranged on a plurality of feed bodies 132 and distributed at equal intervals, and is matched with independent sintering conditions of a plurality of spaces of a plurality of unit sintering boxes 1313, so as to independently sinter the semi-finished manganese zinc ferrite magnetic powder; and the driving force provided by the driving component is utilized to drive the plurality of unit feed trays 1321 and the placed semi-finished manganese zinc ferrite magnetic powder to move on the plurality of sintered bodies 131 together to adjust the penetration position, so that the matching of the switching and the independent sintering conditions of a plurality of spaces of the plurality of unit sintering boxes 1313 is realized, and the advantages of simplicity in operation, high manufacturing efficiency and the like are further realized; meanwhile, as the sintering conditions are independently set in the multiple spaces of the unit sintering boxes 1313 to independently sinter the semi-finished manganese zinc ferrite magnetic powder, in the process of driving and switching through the driving assembly, the unit feeding trays 1321 are switched into different corresponding unit sintering boxes 1313 with stable sintering condition environments, so that the sintering conditions are updated in place and in time, the sintering condition matching accuracy is high, and the advantages of in-place sintering condition updating, simplicity in operation, high manufacturing efficiency and the like are achieved;
the plurality of sintering cavities 12 distributed in a multi-row multi-column array are matched with the plurality of corresponding multi-piece sintering assemblies 13, so that a large number of semi-finished manganese zinc ferrite magnetic powder can be synchronously processed, and the yield is improved; and the driving assembly drives the switching to enter different stable sintering condition environments, so that the process of resetting the sintering condition to have a diffusion is avoided, and the sintering efficiency is improved.
In the embodiment of the present invention, as shown in fig. 1 and 2: the sintering box body 1 is arranged on the bottom plate 4 through the mounting plate 3 (specifically, the sintering box body 1 is integrally fixed on the mounting plate 3, the mounting plate 3 is fixed on the bottom plate 4 through a plurality of screws), and a plurality of supporting feet 5 are arranged at the bottom of the bottom plate 4 and used for supporting; the ends at the two ends of the sintering box body 1 are respectively provided with a sealing door 2;
an operation table 6 is arranged on the bottom plate 4 positioned at the side of the sintering box body 1, and the operation table 6 is used for adjusting and controlling independent sintering conditions of a plurality of corresponding spaces of the unit sintering boxes 1313;
a plurality of nitrogen supply tanks 7 are installed on the bottom plate 4 at the side of the sintering tank 1 for supplying nitrogen gas, respectively.
In the embodiment of the present invention, as shown in fig. 4: the multiple feeding bodies 132 are provided with supporting plankers 1323, and the multiple unit feeding trays 1321 are detachably arranged on the supporting plankers 1323 at equal intervals;
a plurality of limiting holes 1322 are formed at the ends of the two ends of the support carriage 1323 for assembling with the driving assembly;
the driving assembly consists of a screw rod and a nut, the screw rod is driven by a motor to rotate, and the screw rod and the nut are in threaded transmission fit to drive the nut to move so as to drive the supporting carriage 1323 and the unit feeding tray 1321 to move.
Starting the motor, driving the screw rod to rotate by using the motor, driving the screw rod to be in threaded transmission fit with the nut, driving the nut to move, driving the supporting carriage 1323 and the unit feeding disk 1321 to move, enabling the unit feeding disks 1321 to be switched into different corresponding unit sintering boxes 1313 with stable sintering condition environments, and achieving that the sintering conditions are updated in place timely, and the sintering condition matching accuracy is high.
The driving assembly may be, besides being driven by a motor, a screw and a nut, a gear tooth driving combination of a motor, a gear and a rack, or a gear tooth driving combination of a motor, a gear and a chain, etc., and the specific structure driving is not limited, so long as the driving requirement can be met, and the driving support carriage 1323 and the unit feeding tray 1321 are driven to move, and preferably driven by a motor, a screw and a nut.
In the embodiment of the present invention, as shown in fig. 6 and 7: a plurality of unit sintering boxes 1313 distributed at equal intervals are detachably mounted on the fixing frame 1312;
the unit sintering box 1313 is composed of a sealing support seat 13132 and a lifting sealing cap 13131 movably inserted on the sealing support seat 13132; unit feed tray 1321 is movably inserted in seal support 13132;
wherein, the fixing frame 1312 and the lifting sealing cap 13131 are detachably installed and separated from the sealing supporting seat 13132; a lifting structure is arranged on the fixing frame 1312; the lifting structure is utilized to lift, and the lifting sealing cap 13131 is driven by the fixing frame 1312 to movably insert and adjust on the sealing supporting seat 13132.
Before the driving assembly drives and switches, the lifting structure is started to pull out the lifting sealing caps 13131 from the sealing supporting seat 13132, the sealing of the unit sintering boxes 1313 is released, the driving assembly pushes the unit feeding plates 1321 to sequentially enter the next sealing supporting seat 13132, the lifting structure is started to continuously insert the lifting sealing caps 13131 downwards into the sealing supporting seat 13132, the unit sintering boxes 1313 are continuously sealed, the unit feeding plates 1321 are switched into different corresponding unit sintering boxes 1313 with stable sintering condition environments, the sintering conditions are updated in time, and the sintering condition matching accuracy is high.
For the description of the lifting structure, the lifting structure can be a threaded rod and a nut driven by a nut screw to drive the nut to lift, or can be a hydraulic cylinder to lift, or a pneumatic cylinder to lift, etc., and the specific structure is not limited, so long as the lifting structure can drive the lifting sealing cap 13131 to movably insert and adjust on the sealing supporting seat 13132, and a hydraulic cylinder is preferably adopted here.
In the embodiment of the present invention, as shown in fig. 3 and 6: the fixed frame 1312 is provided with a fixed cross beam 13122, and the fixed cross beam 13122 is fixedly connected with the lifting structure;
a plurality of fixed columns 13121 distributed at equal intervals are fixed on one side wall of the fixed beam 13122, and a connecting plate 13123 is fixed on one end of the fixed column 13121 far away from the fixed beam 13122;
the web 13123 is detachably coupled to the lifting sealing cap 13131.
In the embodiment of the present invention, as shown in fig. 12: a through cavity which penetrates up and down is formed in the seal supporting seat 13132, and a side chute 131324 is formed at the bottom of the side wall in the through cavity;
the seal support seat 13132 is provided with two parallel shallow storage side cavities 131321 and two parallel deep storage side cavities 131322; the shallow storage side chamber 131321 and the deep storage side chamber 131322 are vertical; the deep accommodating side cavity 131322 is vertically communicated;
the side sliding grooves 131324 are distributed in parallel with the shallow accommodating side cavities 131321;
the bottom of the seal support seat 13132 is provided with penetrating gaps 131323, and the penetrating gaps 131323 are distributed in parallel with the deep storage side cavity 131322.
In the embodiment of the invention, as shown in fig. 3, 6-9 and 12: the lifting sealing cap 13131 is provided with a supporting top 131312, two long penetrating sealing plates 131314 which are distributed in parallel are fixed on the supporting top 131312, and the long penetrating sealing plates 131314 are correspondingly and movably penetrated in the deep accommodating side cavity 131322;
two short penetration sealing plates 131313 which are distributed in parallel are fixed on the supporting top 131312, and the short penetration sealing plates 131313 are correspondingly penetrated in the shallow containing side cavity 131321 in a movable manner.
In the embodiment of the invention, as shown in fig. 3-9 and 12: a storage tank 13211 is arranged on the unit feed tray 1321 and is used for placing semi-finished manganese zinc ferrite magnetic powder;
side convex edges 13212 are fixed on the side walls of the unit feed trays 1321 at the two sides of the storage tank 13211, and the side convex edges 13212 are used for being movably inserted into the side sliding tank 131324;
the unit feeding trays 1321 positioned at the front end and the rear end of the storage tank 13211 are provided with limiting sealing grooves 13213;
the long penetration sealing plate 131314 is correspondingly matched with the limit sealing groove 13213 to be penetrated.
Before the drive assembly drives the plurality of unit feed trays 1321 to switch, a lifting structure is started to lift a supporting top 131312 on the lifting sealing cap 13131, so that the supporting top 131312 drives a short penetrating sealing plate 131313 to be pulled out of the shallow storage side cavity 131321, and the supporting top 131312 drives a long penetrating sealing plate 131314 to be pulled out of the deep storage side cavity 131322, so that the lifting sealing cap 13131 is pulled out of the sealing supporting seat 13132 movably, the long penetrating sealing plate 131314 is separated from the limiting sealing groove 13213, and the sealing of the unit sintering box 1313 is released; the redrive assembly pushes the plurality of unit feed trays 1321, with the side flanges 13212 moving inside the side slide groove 131324, sequentially into the next seal support 13132;
the lifting structure is started to drive the supporting roof 131312 on the lifting sealing cap 13131 to descend, the supporting roof 131312 drives the short penetrating sealing plate 131313 to descend to the inside of the shallow storage side cavity 131321 to continue to insert, the supporting roof 131312 drives the long penetrating sealing plate 131314 to descend to the inside of the deep storage side cavity 131322 to continue to insert, the lifting sealing cap 13131 passes through the inside of the limiting sealing groove 13213 to be limited by the limiting sealing groove 13213, the long penetrating sealing plate 131314 and the limiting sealing groove 13213 are buckled to limit, the unit sintering box 1313 is continuously sealed, a plurality of unit feed trays 1321 are enabled to be switched into different corresponding unit sintering boxes 1313 with stable sintering condition environments, sintering conditions are updated in place timely, and sintering condition matching accuracy is high.
In the embodiment of the present invention, as shown in fig. 9: the lifting sealing cap 13131 is provided with a pipeline collecting pipe 131311, the pipeline collecting pipe 131311 is fixed by a reinforcing ring 131315 (a specific pipeline collecting pipe 131311 is fixed on the supporting top 131312 by a reinforcing ring 131315);
the line header 131311 is connected to a sintering conditioning structure 131316, and the sintering conditioning structure 131316 is mounted inside the lifting seal cap 13131.
The sintering condition adjusting structure 131316 is started to set the internal sintering condition of the lifting sealing cap 13131, so that the process that the unit sintering box 1313 resets the sintering condition to be diffused is avoided, and then the unit sintering box is driven by the driving assembly to be switched into different stable sintering condition environments, and the sintering efficiency is improved.
In an embodiment of the present invention, as shown in fig. 9 to 11: a fixing plate 1313164 is arranged on the sintering condition adjusting structure 131316;
two sintering condition adjustment discs 1313162 are arranged on the sintering condition adjustment structure 131316, and the two sintering condition adjustment discs 1313162 are symmetrically distributed relative to the fixed plate 1313164; a sintering condition adjusting net 1313161 is installed inside the sintering condition adjusting disk 1313162;
the sintering condition adjusting net 1313161 consists of a plurality of mutually-crossed sintering condition adjusting rods; a nitrogen supply cavity for conveying nitrogen is formed in the sintering condition adjusting rod, a plurality of nitrogen supply holes 1313165 distributed in an array are formed in the side wall of the sintering condition adjusting rod, and the nitrogen supply holes 1313165 are communicated with the nitrogen supply cavity; the height of the nitrogen gas supply hole 1313165 at the gas outlet at the end far from the nitrogen gas supply cavity is set to be larger than the height of the nitrogen gas supply hole 1313165 at the gas inlet at the end near to the nitrogen gas supply cavity;
furthermore, the height of the nitrogen gas supply hole 1313165 at the air outlet far from one end of the nitrogen gas supply cavity is larger than the height of the nitrogen gas supply hole 1313165 at the air inlet near one end of the nitrogen gas supply cavity, so that the nitrogen gas supply hole 1313165 is inclined to supply nitrogen gas upwards, and the problem that dust is easily raised due to the fact that semi-finished manganese zinc ferrite magnetic powder is easily blown up by filling nitrogen gas under the small-space unit sintering box 1313, and the unit feeding disc 1321 leaks out in the process of switching into different stable sintering condition environments is avoided, so that the yield is affected; the sintering stability of the manganese zinc ferrite magnetic powder is improved;
an electric heating plate 1313166 is arranged at the bottom of the sintering condition adjusting rod, and electric heating wires are paved on the electric heating plate 1313166 and used for adjusting and controlling the temperature inside the unit sintering box 1313;
the pipeline collecting pipe 131311 is internally inserted with a cable and a nitrogen delivery pipe, the cable is connected to the electric heating plate 1313166, the nitrogen delivery pipe is communicated with the inside of the nitrogen supply cavity (the cable is externally connected to an external power supply at one end far away from the electric heating plate 1313166, the external power supply is the prior art and can be directly purchased in the market at the same time, and the nitrogen delivery pipe is connected to the nitrogen supply tank 7 at one end far away from the nitrogen supply cavity;
a telescopic adjusting sleeve 1313163 is fixed on the fixed plate 1313164 and is fixed on the lifting sealing cap 13131 through a telescopic adjusting sleeve 1313163; the inside of the telescopic adjusting sleeve 1313163 is driven to stretch by an air cylinder telescopic rod, and the telescopic adjusting sleeve 1313163 is made of a heat insulation material;
the periodic lifting adjustment of the sintering condition adjusting net 1313161 is realized through the periodic driving and the stretching of the cylinder telescopic rod, the sintering condition adjusting net 1313161 is accelerated to adjust and control the sintering condition in the unit sintering box 1313, the process of setting the sintering condition to have a diffusion is shortened, and the sintering efficiency is improved; meanwhile, a plurality of sintering cavities 12 distributed in a multi-row multi-column array are combined to be matched with a plurality of corresponding multi-piece sintering assemblies 13, so that a large number of semi-finished manganese zinc ferrite magnetic powder can be synchronously processed on the basis of a small space stable sintering condition environment, and the yield is improved.
The working principle of the invention is as follows:
1. the semi-finished manganese zinc ferrite magnetic powder is dispersed and placed on a plurality of unit feed trays 1321 which are arranged on a plurality of feed bodies 132 and distributed at equal intervals, and is matched with independent sintering conditions of a plurality of spaces of a plurality of unit sintering boxes 1313, so as to independently sinter the semi-finished manganese zinc ferrite magnetic powder; and the driving force provided by the driving component is utilized to drive the plurality of unit feed trays 1321 and the placed semi-finished manganese zinc ferrite magnetic powder to move on the plurality of sintered bodies 131 together to adjust the penetration position, so that the matching of the switching and the independent sintering conditions of a plurality of spaces of the plurality of unit sintering boxes 1313 is realized, and the advantages of simplicity in operation, high manufacturing efficiency and the like are further realized; meanwhile, as the sintering conditions are independently set in the multiple spaces of the unit sintering boxes 1313 to independently sinter the semi-finished manganese zinc ferrite magnetic powder, in the process of driving and switching through the driving assembly, the unit feeding trays 1321 are switched into different corresponding unit sintering boxes 1313 with stable sintering condition environments, so that the sintering conditions are updated in place and in time, the sintering condition matching accuracy is high, and the advantages of in-place sintering condition updating, simplicity in operation, high manufacturing efficiency and the like are achieved;
2. the plurality of sintering cavities 12 distributed in a multi-row multi-column array are matched with the plurality of corresponding multi-piece sintering assemblies 13, so that a large number of semi-finished manganese zinc ferrite magnetic powder can be synchronously processed, and the yield is improved; the driving assembly drives the switching to enter different stable sintering condition environments, so that a process of resetting the sintering condition to diffuse is avoided, and the sintering efficiency is improved;
3. because the height of the nitrogen gas supply hole 1313165 at the air outlet far from one end of the nitrogen gas supply cavity is larger than the height of the nitrogen gas supply hole 1313165 at the air inlet near one end of the nitrogen gas supply cavity, the nitrogen gas supply hole 1313165 is inclined to provide nitrogen gas upwards, and the problems that dust is easily raised due to the fact that semi-finished manganese zinc ferrite magnetic powder is easily blown up by filling nitrogen gas under the small-space unit sintering box 1313, and the unit feeding disc 1321 leaks out in the process of switching into different stable sintering condition environments and the yield is affected are avoided; the sintering stability of the manganese zinc ferrite magnetic powder is improved;
4. the periodic lifting adjustment of the sintering condition adjusting net 1313161 is realized through the periodic driving and the stretching of the cylinder telescopic rod, the sintering condition adjusting net 1313161 is accelerated to adjust and control the sintering condition in the unit sintering box 1313, the process of setting the sintering condition to have a diffusion is shortened, and the sintering efficiency is improved; meanwhile, a plurality of sintering cavities 12 distributed in a multi-row multi-column array are combined to be matched with a plurality of corresponding multi-piece sintering assemblies 13, so that a large number of semi-finished manganese zinc ferrite magnetic powder can be synchronously processed on the basis of a small space stable sintering condition environment, and the yield is improved.
In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The sintering device for the manganese zinc ferrite magnetic powder is characterized by comprising a sintering box body, wherein a filling lining body is filled in the sintering box body, a plurality of sintering cavities distributed in a plurality of rows and a plurality of arrays are formed in the filling lining body, and a plurality of sintering assemblies used for independently sintering the semi-finished manganese zinc ferrite magnetic powder in a plurality of spaces are arranged in the sintering cavities;
the multiple sintering components are composed of multiple sintering bodies and multiple feeding bodies movably inserted on the multiple sintering bodies; the power transmission of the multiple feeding bodies is connected to the driving assembly, and the penetration positions of the multiple feeding bodies on the multiple sintering bodies are adjusted by using the driving assembly;
wherein, the plurality of sintering bodies are provided with a plurality of sintering boxes and a fixing frame arranged on the plurality of sintering boxes; the plurality of sintering boxes are composed of a plurality of unit sintering boxes which are distributed at equal intervals; the unit sintering boxes are used for independently setting sintering conditions in multiple spaces to independently sinter the semi-finished manganese zinc ferrite magnetic powder;
a plurality of unit feed trays which are distributed at equal intervals are arranged on the plurality of feed bodies and are used for matching with independent sintering conditions of a plurality of spaces of a plurality of unit sintering boxes;
the unit sintering boxes are detachably arranged on the fixing frame; the unit sintering box consists of a sealing support seat and a lifting sealing cap movably inserted on the sealing support seat; the unit feeding disc is movably inserted on the sealing support seat; wherein the fixing frame and the lifting sealing cap are detachably installed and are separated from the sealing support seat; a lifting structure is arranged on the fixing frame; lifting by the lifting structure, and driving the lifting sealing cap to movably insert and adjust on the sealing support seat through the fixing frame; the sealing support seat is internally provided with a through cavity which is vertically penetrated, and the bottom of the side wall in the through cavity is provided with a side chute; the sealing support seat is provided with two parallel shallow storage side cavities and two parallel deep storage side cavities; the shallow storage side cavity and the deep storage side cavity are vertical; the deep storage side cavity is vertically communicated; the side sliding grooves are distributed in parallel with the shallow accommodating side cavities; the bottom of the sealing support seat is provided with penetrating gaps which are distributed in parallel with the deep storage side cavity; the lifting sealing cap is provided with a supporting top, two long penetrating sealing plates which are distributed in parallel are fixed on the supporting top, and the long penetrating sealing plates are correspondingly and movably penetrated in the deep storage side cavity; two short penetration sealing plates which are distributed in parallel are fixed on the supporting top, and the short penetration sealing plates are correspondingly penetrated in the shallow accommodating side cavity in a movable manner; a storage tank is arranged on the unit feed tray and used for placing semi-finished manganese zinc ferrite magnetic powder; the side walls of the unit feed trays at the two sides of the storage tank are fixedly provided with side convex edges which are used for being movably inserted into the side sliding tank; the unit feed trays positioned at the front end and the rear end of the storage tank are provided with limiting seal grooves; the long penetration sealing plate is correspondingly matched with the limit sealing groove to be penetrated.
2. A sintering apparatus for manganese-zinc-ferrite magnetic powder according to claim 1, wherein,
the sintering box body is arranged on the bottom plate through the mounting plate, and a plurality of supporting feet are arranged at the bottom of the bottom plate and used for supporting; the ends at the two ends of the sintering box body are respectively provided with a sealing door;
an operation table is arranged on a bottom plate positioned at the side edge of the sintering box body, and the operation table is utilized to adjust and control independent sintering conditions of a plurality of corresponding spaces of the unit sintering boxes;
a plurality of nitrogen supply tanks are arranged on the bottom plate at the side edge of the sintering box body and used for respectively providing nitrogen.
3. A sintering apparatus for manganese-zinc-ferrite magnetic powder according to claim 1, wherein,
the plurality of feeding bodies are provided with supporting plankers, and the plurality of unit feeding trays are detachably arranged on the supporting plankers at equal intervals;
a plurality of limiting holes are formed at the end heads at the two ends of the support carriage and are used for being assembled with the driving assembly;
the driving assembly consists of a screw rod and a nut, the screw rod is driven by a motor to rotate, and the screw rod and the nut are matched in a threaded transmission manner to drive the nut to move so as to drive the support carriage and the unit feed tray to move.
4. A sintering apparatus for manganese-zinc-ferrite magnetic powder according to claim 1, wherein,
the fixed frame is provided with a fixed cross beam which is fixedly connected with the lifting structure;
a plurality of fixed columns which are distributed at equal intervals are fixed on one side wall of the fixed cross beam, and a connecting plate is fixed at one end of the fixed column far away from the fixed cross beam;
the connecting plate is detachably connected to the lifting sealing cap.
5. A sintering apparatus for manganese-zinc-ferrite magnetic powder according to claim 1, wherein,
a pipeline collecting pipe is arranged on the lifting sealing cap and is fixed through a reinforcing ring;
the pipeline collecting pipe is connected to the sintering condition adjusting structure, and the sintering condition adjusting structure is arranged inside the lifting sealing cap.
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| CN202311480402.1A CN117524703B (en) | 2022-08-04 | 2022-08-04 | Sintering device for magnetic powder |
| CN202210929661.7A CN115410814B (en) | 2022-08-04 | 2022-08-04 | Sintering device for manganese zinc ferrite magnetic powder |
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| CN202210929661.7A CN115410814B (en) | 2022-08-04 | 2022-08-04 | Sintering device for manganese zinc ferrite magnetic powder |
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| CN114274009A (en) * | 2021-12-28 | 2022-04-05 | 南通华兴磁性材料有限公司 | Preparation process of anti-interference soft magnetic ferrite core |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117524703B (en) | 2024-05-28 |
| CN115410814A (en) | 2022-11-29 |
| CN117524703A (en) | 2024-02-06 |
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