CN211915505U - Device for sintering magnet - Google Patents
Device for sintering magnet Download PDFInfo
- Publication number
- CN211915505U CN211915505U CN202020521465.2U CN202020521465U CN211915505U CN 211915505 U CN211915505 U CN 211915505U CN 202020521465 U CN202020521465 U CN 202020521465U CN 211915505 U CN211915505 U CN 211915505U
- Authority
- CN
- China
- Prior art keywords
- graphite
- graphite box
- box body
- box cover
- sintered magnet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Powder Metallurgy (AREA)
Abstract
The utility model discloses a device for sintered magnet, it includes: a plurality of graphite cases for accommodating a magnet raw material to be sintered; the bottom of the graphite box body is closed, and the top of the graphite box body is provided with an opening; a plurality of graphite box covers respectively arranged to be capable of closing the openings; the graphite box comprises a graphite box cover, a graphite box body and a plurality of graphite boxes, wherein the graphite box cover and the graphite box body form a graphite box; the metal plate is arranged on the upper surface of the graphite box cover and is positioned in the middle of the graphite box cover; wherein the horizontal sectional area of the metal plate is smaller than that of the graphite box cover. Adopt the utility model discloses a device for sintered magnet can improve the performance of upper sintered magnet.
Description
Technical Field
The utility model relates to a device, especially a device for sintered neodymium iron boron magnet for sintered magnet.
Background
The sintering process is an important step in the production and manufacturing process of the neodymium iron boron magnet. The sintering process mainly comprises a low-temperature presintering stage, a medium-temperature heating sintering stage, a high-temperature heat preservation completion sintering stage and other stages. The effect produced by each stage is different.
And in the low-temperature presintering stage, adsorbed gas and water are volatilized, and a forming agent in the pressed compact is decomposed and removed. In the medium-temperature heating sintering stage, recrystallization begins to occur, grains deformed in the metal particles are recovered and are changed into new grains, and meanwhile, oxides on the surface are reduced, and sintering necks are formed on particle interfaces. In the high-temperature heat-preservation sintering stage, diffusion and flow are fully performed and are nearly completed, a large amount of closed pores are formed, the sizes of pores and the total number of pores are reduced, and the density of a sintered body is obviously increased.
The low-temperature pre-sintering stage is the beginning of the sintering stage and is also the basic stage of the subsequent sintering stage. In traditional low temperature stage of presintering, the graphite lid of superiors is because the quality is lighter during the sintering for there is the gap between graphite lid and the graphite box body, and the adsorbed gas of lower floor's furnace charge and the volatilizing of moisture and the decomposition of antioxidant and emollient in the pressed compact with spill over and extremely get into the upper graphite feed box and pollute the upper furnace charge, make the performance of the upper furnace charge (magnet) of the majority that obtains not up to standard, influenced the product percent of pass.
Therefore, it is necessary to provide an apparatus for a sintered magnet capable of improving the performance of the upper layer magnet.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to provide a device for sintered magnet, which can improve the performance of the upper layer magnet in the aspects of coercive force and squareness.
The utility model adopts the following technical scheme to realize the purpose.
The utility model provides a device for sintered magnet, the device includes:
a plurality of graphite cases for accommodating a magnet raw material to be sintered; the bottom of the graphite box body is closed, and the top of the graphite box body is provided with an opening;
a plurality of graphite box covers respectively arranged to be capable of closing the openings; the graphite box comprises a graphite box cover, a graphite box body and a plurality of graphite boxes, wherein the graphite box cover and the graphite box body form a graphite box;
the metal plate is arranged on the upper surface of the graphite box cover and is positioned in the middle of the graphite box cover; wherein the horizontal sectional area of the metal plate is smaller than that of the graphite box cover.
The utility model discloses in, a graphite lid and a graphite box body form a complete graphite magazine, and a plurality of graphite boxes of the corresponding a plurality of graphite magazines that form of a plurality of graphite lids and a plurality of graphite box bodies. A plurality of graphite cartridges are stacked in parallel and form a multilayer structure.
In the utility model, a multi-layer graphite material box is needed to be formed during sintering. The utility model discloses the discovery, through placing the metal sheet at the upper surface of graphite lid, can reduce the gap between graphite lid and the graphite box body, can be so that graphite lid and graphite box body form sealed graphite magazine, thereby can avoid volatilizing of adsorbed gas and the moisture of lower floor's furnace charge to get into upper graphite magazine in and pollute the upper furnace charge, and avoid in the pressed compact decomposition of antioxidant and emollient and spill over and get into upper graphite magazine in and pollute the upper furnace charge, and then improve the performance of upper furnace charge (be upper sintering magnet).
According to the device for sintering the magnet of the present invention, preferably, the shape of the graphite case is close to a rectangular parallelepiped; the graphite box cover is approximately cuboid in shape and is provided with two long side parts and two short side parts; a right angle part is formed between the long side part and the short side part. According to one embodiment of the present invention, the graphite box body is a rectangular parallelepiped structure with a sealed bottom, and an opening is formed at the top thereof; the graphite box cover is of a cuboid structure and is provided with two long side parts, two short side parts and four right angle parts. Thus being beneficial to realizing the sintering of the charge to be sintered.
According to the utility model discloses a device for sintered magnet, preferably, the upper surface of graphite lid is provided with a plurality of cushions along its edge, the cushion sets up to form certain space between can making adjacent graphite magazine. Thus being beneficial to realizing rapid and uniform cooling of the bottom of the graphite material box during cooling.
According to the device for sintering the magnet of the utility model, preferably, the cushion blocks are symmetrically distributed; one part of the cushion blocks are arranged on the upper surface of the right-angle part of the graphite box cover, and the other part of the cushion blocks are respectively arranged on the upper surface of the long side part of the graphite box cover. According to an embodiment of the present invention, the number of the cushion blocks is six, and the six cushion blocks are symmetrically distributed; the four cushion blocks are respectively arranged on the upper surfaces of the right-angle parts of the graphite box cover, and the other two cushion blocks are respectively arranged on the upper surfaces of the long side parts of the graphite box cover. Thus being beneficial to realizing rapid and uniform cooling of the bottom of the graphite material box during cooling.
According to the device for sintering the magnet of the present invention, preferably, the upper surface of at least a part of the cushion blocks is provided with a stopper; the lower surface of the graphite box body is provided with a box body convex layer; the outline that the stopper encloses with the shape phase-match of box body convex layer, the stopper is used for right the box body convex layer is spacing to it is spacing with adjacent graphite box body. According to one embodiment of the invention, the upper surfaces of all the spacers are provided with stoppers. The outline enclosed by the limiting block is matched with the shape of the convex layer of the box body.
According to the device for sintering the magnet of the present invention, preferably, a part of the stopper is disposed on the upper surface of the cushion block at the right angle portion of the graphite box cover, and the stopper is an extension bar having two right angles; the other part of the limiting block is arranged on the upper surface of the cushion block at the long edge part of the graphite box cover and is provided with an extending strip. According to one embodiment of the invention, the four limiting blocks have right-angle sections and are respectively arranged on the upper surfaces of the cushion blocks at the right-angle parts of the graphite box cover; the other two limiting blocks are provided with straight-line-shaped cross sections and are respectively arranged on the upper surfaces of the cushion blocks on the long edge part of the graphite box cover. The bottom that is favorable to making the graphite box body on upper strata can not remove or rock at the top of the graphite lid of lower floor like this to with the graphite box body on upper strata and the graphite lid relatively fixed of lower floor, be about to the graphite magazine on upper strata and the graphite magazine relatively fixed of lower floor.
According to the device for sintering the magnet of the present invention, preferably, the lower surface of the graphite box cover is provided with a box cover convex layer, and the shape of the box cover convex layer matches with the shape of the opening of the graphite box body; the convex layer of the box cover can be embedded into the opening of the graphite box body, so that the graphite box cover can be limited in the graphite box body. Thus being beneficial to the sealing of the graphite box, namely the graphite box cover can not move or rock relative to the graphite box body.
According to the utility model discloses a device for sintered magnet, preferably, multilayer structure includes 5 ~ 6 layers of graphite magazine. In the multilayer structure, for any one of the graphite cartridges, the graphite cartridge body is located below the graphite cartridge cover.
According to the utility model discloses an apparatus for sintered magnet, preferably, the metal sheet only sets up in the upper surface of the graphite lid of the superiors' graphite magazine. Thus, the graphite material box is favorable for sealing, the performance of the upper-layer sintered magnet is further improved, and the cost is also favorably saved.
According to the utility model discloses a device for sintered magnet, preferably, the horizontal sectional area of graphite lid with the horizontal sectional area of graphite box body equals. The utility model discloses a metal sheet can be the steel sheet, preferably Q235B steel sheet. The dimensions of the metal plate may be 210 x 120 x 10 mm. In the utility model, the metal plate is horizontally placed on the graphite box cover in the middle.
The utility model discloses a device for sintered magnet adopts graphite box body and graphite lid to form the graphite magazine, and the metal sheet sets up in graphite box lid upper surface, can make the graphite magazine on upper strata sealed to avoid gas or moisture etc. to get into upper furnace charge and pollute the upper furnace charge, thereby improve the performance of upper furnace charge (upper sintered magnet promptly).
Drawings
Fig. 1 is a schematic structural diagram of an apparatus for sintering a magnet according to the present invention.
Fig. 2 is a schematic view of a graphite case and a graphite case cover in the device for sintered magnet according to the present invention.
Fig. 3 is a schematic view of the lower surface of the graphite case and the lower surface of the graphite case cover in the device for sintered magnet according to the present invention.
The reference numerals are explained below:
100-graphite box body, 200-graphite box cover, 300-metal plate, 201-cushion block, 202-limiting block, 203-box cover convex layer and 101-box body convex layer.
Detailed Description
The present invention will be further described with reference to the following specific examples, but the scope of the present invention is not limited thereto.
Example 1
Fig. 1 is a schematic structural diagram of an apparatus for sintering a magnet according to the present invention. Fig. 2 is a schematic view of a graphite case and a graphite case cover in the device for sintered magnet according to the present invention. Fig. 3 is a schematic lower surface view of a graphite case and a graphite case cover in the device for sintered magnet according to the present invention.
The device for sintering magnet of the present invention comprises a plurality of graphite box bodies 100, a plurality of graphite box covers 200 and more than one metal plate 300. The graphite case 100 contains a magnet raw material to be sintered. One graphite lid 200 and one graphite box body 100 form one graphite box. The horizontal sectional area of the graphite case cover 200 is equal to the horizontal sectional area of the graphite case body 100. A plurality of graphite capsules are stacked in parallel to form a multi-layered structure. The graphite box 100 is closed at the bottom and has an opening at the top. The graphite case covers 200 can respectively close the openings of the graphite case bodies 100.
The metal plate 300 is disposed on the upper surface of the graphite box cover 200 and is located in the middle of the graphite box cover 200. The metal plate 300 can ensure that the graphite box cover 200 seals the graphite box body 100. The horizontal sectional area of the metal plate 300 is smaller than that of the graphite case cover 200. In this example, the metal plate is a Q235B steel plate, and the size is 210X 120X 10 mm. The metal plate is disposed only on the upper surface of the uppermost graphite magazine 200.
The upper surface (the surface away from the opening of the graphite case body 100) of the graphite case cover 200 is provided with a plurality of spacers 201 along the edge thereof, thereby ensuring that a certain gap is formed between the adjacent graphite cases. In this embodiment, six spacers 201 are symmetrically disposed. Four spacers 20 are located on the upper surface of the right-angle portion of the graphite box cover 200, and the other two spacers 201 are located on the upper surface of the long side portion of the graphite box cover 200.
The lower surface of the graphite box cover 200 (the surface close to the opening of the graphite box body 100) is provided with a cover convex layer 203. The shape of the convex layer 203 of the box cover is matched with the shape of the opening of the graphite box body 100. The convex layer 203 can be inserted into the opening of the graphite box body 100, so as to limit the graphite box cover 200 to the graphite box body 100.
Example 2
The remaining structure is the same as in example 1 except for the following structure:
the lower surface (the surface far from the graphite box cover 200) of the graphite box body 100 is provided with a box body convex layer 101. The upper surface of the cushion block 201 is provided with a limiting block 202. The outline surrounded by the limit blocks 202 is matched with the shape of the convex layer 101 of the box body. The stopper 202 limits the convex layer 101 of the box body, thereby limiting the adjacent graphite box body.
The four limiting blocks 202 positioned on the upper surface of the cushion block 201 at the right-angle part of the graphite box cover 200 are extension strips with two right-angled included angles; its cross section is made into the form of L-L similar to right-angle. The other two stoppers 200 positioned on the upper surface of the long side portion of the graphite cap 200 have an extension having a cross-section in the shape of a straight-line.
The raw material of the magnet to be sintered is put into the graphite case body 100, and the graphite case body 100 is closed with the graphite case cover 200, thereby forming the graphite case. The 6 graphite boxes are stacked in parallel, and the Q235B steel plate is closely placed on the upper surface of the graphite box cover 200 of the uppermost graphite box to form the device for sintering the magnet.
Comparative example 1
The same procedure as in example 2 was followed, except that:
the raw material of the magnet to be sintered is put into the graphite case body 100, and the graphite case body 100 is closed with the graphite case cover 200, thereby forming the graphite case. The 6 graphite boxes are stacked in parallel, and the Q235B steel plate is not arranged on the upper surface of the graphite box cover 200 of the uppermost graphite box, so that the device for sintering the magnet is formed.
The two types of devices for sintered magnets of example 2 and comparative example 1 were simultaneously placed in a sintering furnace and sintered, and after completion of sintering, the uppermost magnet was taken out and subjected to a performance test. The results are shown in Table 1.
TABLE 1
| Numbering | Coercive force/KOe | Squareness/%) |
| Example 2 | 12.90 | 0.996 |
| Comparative example 1 | 12.36 | 0.981 |
As is clear from table 1, the performance of the uppermost sintered magnet was significantly improved by the sintered magnet device of example 2 as compared with that of comparative example 1.
The present invention is not limited to the above embodiments, and any variations, modifications, and substitutions that may occur to those skilled in the art may be made without departing from the spirit of the present invention.
Claims (10)
1. An apparatus for sintering a magnet, comprising:
a plurality of graphite cases for accommodating a magnet raw material to be sintered; the bottom of the graphite box body is closed, and the top of the graphite box body is provided with an opening;
a plurality of graphite box covers respectively arranged to be capable of closing the openings; the graphite box comprises a graphite box cover, a graphite box body and a plurality of graphite boxes, wherein the graphite box cover and the graphite box body form a graphite box;
the metal plate is arranged on the upper surface of the graphite box cover and is positioned in the middle of the graphite box cover; wherein the horizontal sectional area of the metal plate is smaller than that of the graphite box cover.
2. An apparatus for a sintered magnet as claimed in claim 1, wherein said graphite case is approximately rectangular parallelepiped in shape; the graphite box cover is approximately cuboid in shape and is provided with two long side parts and two short side parts; a right angle part is formed between the long side part and the short side part.
3. An apparatus for a sintered magnet as claimed in claim 2, wherein the upper surface of the graphite box cover is provided with a plurality of spacers along its edges, the spacers being arranged so as to allow a space to be formed between adjacent graphite boxes.
4. An apparatus for sintered magnets as claimed in claim 3, wherein said blocks are symmetrically distributed; one part of the cushion blocks are arranged on the upper surface of the right-angle part of the graphite box cover, and the other part of the cushion blocks are respectively arranged on the upper surface of the long side part of the graphite box cover.
5. An apparatus for a sintered magnet as defined in claim 4, wherein a stopper is provided on an upper surface of at least a part of the spacers; the lower surface of the graphite box body is provided with a box body convex layer; the outline that the stopper encloses with the shape phase-match of box body convex layer, the stopper is used for right the box body convex layer is spacing to it is spacing with adjacent graphite box body.
6. The apparatus for sintered magnet as claimed in claim 5, wherein a part of the stopper is disposed on the upper surface of the block at the right angle part of the graphite case cover, and is an extension bar having two right angles; the other part of the limiting block is arranged on the upper surface of the cushion block at the long edge part of the graphite box cover and is provided with an extending strip.
7. The apparatus for sintered magnet as claimed in claim 6, wherein the graphite box cover is provided with a convex layer on the lower surface, and the shape of the convex layer matches with the shape of the opening of the graphite box body; the convex layer of the box cover can be embedded into the opening of the graphite box body, so that the graphite box cover can be limited in the graphite box body.
8. An apparatus for a sintered magnet as claimed in any one of claims 1 to 7, wherein said multilayer structure comprises 5 to 6 layers of graphite capsules.
9. An apparatus for a sintered magnet as claimed in any one of claims 1 to 7, wherein said metal plate is provided only on the upper surface of the graphite box lid of the uppermost graphite box.
10. An apparatus for a sintered magnet as claimed in any one of claims 1 to 7, wherein a horizontal sectional area of said graphite box cover is equal to a horizontal sectional area of said graphite box body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020521465.2U CN211915505U (en) | 2020-04-10 | 2020-04-10 | Device for sintering magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020521465.2U CN211915505U (en) | 2020-04-10 | 2020-04-10 | Device for sintering magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211915505U true CN211915505U (en) | 2020-11-13 |
Family
ID=73375178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020521465.2U Active CN211915505U (en) | 2020-04-10 | 2020-04-10 | Device for sintering magnet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211915505U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113770355A (en) * | 2021-08-31 | 2021-12-10 | 浙江英洛华磁业有限公司 | Sintering container for rare earth alloy sintering heat treatment and preparation method thereof |
-
2020
- 2020-04-10 CN CN202020521465.2U patent/CN211915505U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113770355A (en) * | 2021-08-31 | 2021-12-10 | 浙江英洛华磁业有限公司 | Sintering container for rare earth alloy sintering heat treatment and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3200209B1 (en) | Method for manufacturing rare-earth sintered magnet, and manufacturing device used for said manufacturing method | |
| CN211915505U (en) | Device for sintering magnet | |
| US20110250087A1 (en) | Method for producing sintered rare-earth magnet and powder-filling container for producing such magnet | |
| CN107573050B (en) | Preparation method of ultra-large manganese-zinc ferrite magnetic core | |
| CN106783131A (en) | A kind of preparation method of sintered NdFeB thin slice magnet | |
| CN212094332U (en) | Sintering device of neodymium iron boron magnet | |
| CN107290172B (en) | Layered sampling device and layered sampling method for mixture of sintering trolley | |
| CN104040655A (en) | Process for producing sintered R-T-B magnet | |
| CN202258777U (en) | Charging box of neodymium iron boron magnet raw blank for vacuum sintering furnace | |
| CN102682987A (en) | Preparation method of rare-earth permanent magnet, preparation device and rare-earth permanent magnet prepared thereby | |
| CN102455122A (en) | Heating box of powder metallurgy sintering furnace | |
| JP2002025842A (en) | Method for manufacturing rare-earth sintered magnet | |
| CN105841497B (en) | Ternary Special saggar for lithium battery cathode material | |
| CN210308336U (en) | Ultra-thin type soft magnetic ferrite magnetic core forming die | |
| CN103985535A (en) | Method for conducting Dy diffusion on RTB-system magnet, magnet and diffusion source | |
| JP6138836B2 (en) | Sintered magnet manufacturing apparatus and sintered magnet manufacturing method | |
| CN206022312U (en) | Base plate for packaging drying-plate tool | |
| CN218566180U (en) | Inside and outside type double-layer neodymium iron boron graphite box | |
| CN1228792C (en) | Method for mfg. rare earth sintered magnet | |
| CN104028755A (en) | Permanent magnet sintering material box and material stacking method | |
| CN117804229A (en) | Method for optimizing sintering temperature field of cylindrical target | |
| JP2002020803A (en) | Sintering case, manufacturing method of sintered rare earth magnet using the case, and device for storing sintered molding therein | |
| CN214250581U (en) | Casket-like bowl | |
| CN206300503U (en) | Magnet sintering graphite magazine and processing unit | |
| CN220627514U (en) | Sintering jig for NTC thermistor chip |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Device for sintered magnet Effective date of registration: 20210618 Granted publication date: 20201113 Pledgee: Baotou Branch of Inner Mongolia Hohhot Jingu Rural Commercial Bank Co.,Ltd. Pledgor: BAOTOU TIANSHI RARE EARTH NEW MATERIAL Co.,Ltd. Registration number: Y2021150000051 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20220607 Granted publication date: 20201113 Pledgee: Baotou Branch of Inner Mongolia Hohhot Jingu Rural Commercial Bank Co.,Ltd. Pledgor: BAOTOU TIANSHI RARE EARTH NEW MATERIAL CO.,LTD. Registration number: Y2021150000051 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Device for sintered magnet Effective date of registration: 20220621 Granted publication date: 20201113 Pledgee: Baotou Branch of Inner Mongolia Hohhot Jingu Rural Commercial Bank Co.,Ltd. Pledgor: BAOTOU TIANSHI RARE EARTH NEW MATERIAL CO.,LTD. Registration number: Y2022150000055 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230627 Granted publication date: 20201113 Pledgee: Baotou Branch of Inner Mongolia Hohhot Jingu Rural Commercial Bank Co.,Ltd. Pledgor: BAOTOU TIANSHI RARE EARTH NEW MATERIAL CO.,LTD. Registration number: Y2022150000055 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Devices for sintered magnets Effective date of registration: 20230628 Granted publication date: 20201113 Pledgee: Baotou Branch of Inner Mongolia Hohhot Jingu Rural Commercial Bank Co.,Ltd. Pledgor: BAOTOU TIANSHI RARE EARTH NEW MATERIAL CO.,LTD. Registration number: Y2023150000098 |