CN2424433Y - High vacuum fritting furnace - Google Patents
High vacuum fritting furnace Download PDFInfo
- Publication number
- CN2424433Y CN2424433Y CN 00234753 CN00234753U CN2424433Y CN 2424433 Y CN2424433 Y CN 2424433Y CN 00234753 CN00234753 CN 00234753 CN 00234753 U CN00234753 U CN 00234753U CN 2424433 Y CN2424433 Y CN 2424433Y
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- furnace
- furnace chamber
- high vacuum
- chamber
- vacuum sintering
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Abstract
The utility model discloses a high vacuum sintering furnace, which relates to a magnetic heat treatment sintering furnace. The utility model has a furnace body, a furnace door, a furnace chamber and a combustion boat, wherein, the furnace chamber is cylindrical, and the circular chamber diameter of the furnace chamber is smaller than the long chamber diameter. Two air outlets are arranged inside the furnace chamber. Discharge pipes are connected with cooling air ring sleeves. The cooling air ring sleeves are distributed around the inner periphery of the furnace chamber. Thermal insulation insulating layers are arranged inside cooling inner ring sleeves. Heating molybdenum tapes are sheathed inside the insulating layers. The utility model can be used as production equipment for rare earth sintering permanent magnetic materials.
Description
The utility model provides a kind of high vacuum sintering furnace, relates to the magnetic heat treatment sintering furnace.
In the process of sintered NdFeB, sintering temperature is very big to the magnet performance influence, and sintering temperature is low favourable to improving the official report coercivity, but remanent magnetism and magnetic energy product are not the highest, and temperature improves, and magnet density increases, and remanent magnetism and magnetic energy product also improve.If temperature is too high, crystal can be grown up rapidly, and is unfavorable to magnetic property.Therefore want magnet to obtain high-performance, must be controlled at sintering temperature on the relative Cui point.Make each base substrate heating temperature that is burnt in the sintering furnace can both reach a relative Cui point, the structure of sintering furnace, furnace chamber design and mode of heating all play an important role.
Task of the present utility model solves exactly in sintering process, and the furnace chamber even green body is heated and fast evenly cooling problem and the furnace chamber new construction that designs, to reach the Cui point of temperature, improves magnetic thermal sintering treatment effect.
The utlity model has body of heater, fire door, furnace chamber and burning boat, described furnace chamber 16 is long tubular, and its cylindrical cavity footpath is less than footpath, long chamber.In furnace chamber 16, be provided with an air outlet at least, described air outlet is connected with cold gas eyelet thimble 12 by discharge pipe 13, this cold gas eyelet thimble 12 encloses distribution in furnace chamber 16, inner edge at cold gas eyelet thimble 12 is equipped with insulating 14, is with the heating molybdenum band 10 of adjustable economize on electricity stream in insulating 14.Described body of heater 1 is connected by being the crooked vacuum exhaust pipe 6 of 45 degree with diffusion pump 7.Described air outlet can be two.It is 60mm * 1150mm of 100KG that described furnace chamber 16 can have the sintering amount, the size of 700mm * 1430mm of 150KG and 830mm * 1840mm of 300KG.Described burning boat 17 is a rectangular flat thin type side basin, is the frame 17a of hollow around it, 220mm * 340mm can be set, the size of 230mm * 420mm and 240mm * 450mm.At least can place 3 layers of burning boat in the furnace chamber 16, each burns and is provided with the space that can realize cold and hot convection current between boat, and every layer between the upper and lower apart from being 60mm, fore-and-aft clearance 20mm.
The utility model is made as cylindrical cavity footpath to the size of furnace chamber less than footpath, long chamber, and its design reaches the Cui point of materialization and quantification, makes heat radiation, thermal convection current and hot conducting energy be able to even realization, and the acceleration of sintering briquet is heated cooling evenly; Use and burn headspace between the boat layer, can realize thermal convection current and cold convection current, promote the thermally equivalent in the blank sintering, shorten sintering time, improve output; Body of heater adopts sharp bend to be connected with diffusion pump, has changed pressure differential, can reduce furnace chamber impurity, reduces the pollution of diffusion pump, improves the life-span of diffusion pump use, guarantees vacuum, enhances product performance.
Now be illustrated in conjunction with the accompanying drawings and embodiments.
Fig. 1 is the utility model profile plane.
Fig. 2 is the utility model structure drawing in side sectional elevation.
Fig. 3 is the utility model construction profile.
Fig. 4 is for burning boat profile schematic diagram.
As shown in the figure, open fire door 2A and 2B in the body of heater 1, place on the burning boat support 11 in the furnace chamber 16 burning boat 17, burn boat 17 and adopt the carborundum micropore truth of a matter in its bottom, every layer of burning boat all is provided with supporting-point, to guarantee fluid space.For making sinter thermally equivalent and cooling, having designed following three kinds is the furnace chamber of criterion with the sintering amount: can burn 600mm * 1150mm of 100KG, 700mm * 1430mm of 150KG and 830mm * 1840mm of 300KG.According to different furnace chambers, but to place the number of plies and sintering amount, design burning boat specification by the furnace chamber size: burn the furnace chamber of 100KG briquet, size is 220mm * 340mm, can place 3 layers, every layer of 4 burning boat, totally 12; Burn the furnace chamber of 150KG briquet, size is 230mm * 420mm, can put 3 layers, every layer of 5 burning boat, totally 15; Burn the furnace chamber of 300KG briquet, size is 240mm * 450mm, can put 6 layers, every layer of 4 burning boat, totally 24.Burn in each furnace chamber each layer of boat between the upper and lower apart from being 60mm, fore-and-aft clearance is 20mm, making has sufficient space to be heated and cools off between each briquet in the sintering, reach the shortening sintering time, improves the purpose of sintering quality.
Be to strengthen the power of magnetic transformer heating, be provided with heating molybdenum band 10 at the innermost layer of furnace chamber 16, to adjust size of current.In different sintering furnaces, the furnace chamber 90KVA of 100KG, the furnace chamber 120KVA of 150KG, the furnace chamber 180KVA of 300KG adds thermal effect to reach.When sintering, briquet on the burning boat 17 after the heating is heated and produces thermal convection current and heat exchange, by insulating 14 insulation, make in the stove temperature reach 1150 ℃ ±, in sintering, need make temperature reach Cui point just can ensure the quality of products, sintering is 45 degree bendings by vacuum exhaust pipe 6 and anemostat 7 and is connected, and makes the interior heat of furnace chamber keep chilling temperatures by cold gas eyelet thimble 12, and pressure differential is changed, impel the interior impurity of furnace chamber to diminish, reduce and pollute.Cold air is regulated by cold gas discharge pipe 13 and is flowed out, and again through cold gas return duct 15 reflux cycle, makes to keep temperature constant in the stove, unlikelyly too highly causes crystal grain to be grown up rapidly and influences magnetic property.For grasping situation in the stove, can spy on by peephole 3,5, so that in time pinpoint the problems.
Claims (6)
1. high vacuum sintering furnace, have body of heater, fire door, furnace chamber and burning boat, it is characterized in that, described furnace chamber (16) is a cylindrical shape, its cylindrical cavity footpath is less than footpath, long chamber, in furnace chamber (16), be provided with an air outlet at least, described air outlet is connected with cold gas eyelet thimble (12) by discharge pipe (13), this cold gas eyelet thimble (12) encloses distribution in furnace chamber (16), inner edge at cold gas eyelet thimble (12) is equipped with insulating (14), inwardly is with the heating molybdenum band (10) of adjustable economize on electricity stream at this insulating (14).
2. according to the described high vacuum sintering furnace of claim 1, it is characterized in that described body of heater (1) is connected by being the crooked vacuum exhaust pipe (6) of 45 degree with diffusion pump (7).
3. according to the described high vacuum sintering furnace of claim 1, it is characterized in that described air outlet can be 2.
4. according to the described high vacuum sintering furnace of claim 1, it is characterized in that it is 600mm * 1150mm of 100KG that described furnace chamber (16) can have the sintering amount, the size of 700mm * 1430mm of 150KG and 830mm * 1830mm of 300KG.
5. according to the described high vacuum sintering furnace of claim 1, it is characterized in that described burning boat (17) is the square basin of rectangular flat book shape, is the frame 17a of hollow around it, 220mm * 340mm can be set, the size of 230mm * 420mm and 240mm * 450mm.
6. according to claim 1,4 or 5 described high vacuum sintering furnaces, it is characterized in that described furnace chamber (16) can be placed 3 layers of burning boat (17) at least, every layer distance between the upper and lower is 60mm, and fore-and-aft clearance is 20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00234753 CN2424433Y (en) | 2000-05-14 | 2000-05-14 | High vacuum fritting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00234753 CN2424433Y (en) | 2000-05-14 | 2000-05-14 | High vacuum fritting furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2424433Y true CN2424433Y (en) | 2001-03-21 |
Family
ID=33596752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00234753 Expired - Fee Related CN2424433Y (en) | 2000-05-14 | 2000-05-14 | High vacuum fritting furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2424433Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102451909A (en) * | 2010-10-20 | 2012-05-16 | 宁波科宁达工业有限公司 | Method for sintering and tempering sintered neodymium-iron-boron permanent-magnet material |
| CN102962458A (en) * | 2012-11-27 | 2013-03-13 | 浙江一火科技有限公司 | Degreasing section structure of metal injection molded continuous sintering furnace |
| CN103464743A (en) * | 2013-09-10 | 2013-12-25 | 苏州米莫金属科技有限公司 | Metal powder vacuum sintering furnace with uniform heat |
| CN109900117A (en) * | 2019-04-08 | 2019-06-18 | 广东恒洁卫浴有限公司 | A kind of movable calcination supporting plate application technology of ceramics |
| CN112179137A (en) * | 2020-09-23 | 2021-01-05 | 江西荧光磁业有限公司 | Vacuum sintering furnace for processing neodymium iron boron magnet |
-
2000
- 2000-05-14 CN CN 00234753 patent/CN2424433Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102451909A (en) * | 2010-10-20 | 2012-05-16 | 宁波科宁达工业有限公司 | Method for sintering and tempering sintered neodymium-iron-boron permanent-magnet material |
| CN102451909B (en) * | 2010-10-20 | 2015-11-25 | 宁波科宁达工业有限公司 | A kind of sintering of sintered Nd-Fe-B permanent magnetic material and tempering method |
| CN102962458A (en) * | 2012-11-27 | 2013-03-13 | 浙江一火科技有限公司 | Degreasing section structure of metal injection molded continuous sintering furnace |
| CN102962458B (en) * | 2012-11-27 | 2014-10-08 | 浙江一火科技有限公司 | Degreasing section structure of metal injection molded continuous sintering furnace |
| CN103464743A (en) * | 2013-09-10 | 2013-12-25 | 苏州米莫金属科技有限公司 | Metal powder vacuum sintering furnace with uniform heat |
| CN103464743B (en) * | 2013-09-10 | 2016-05-25 | 苏州米莫金属科技有限公司 | The uniform metal powder vacuum sintering furnace of a kind of heat |
| CN109900117A (en) * | 2019-04-08 | 2019-06-18 | 广东恒洁卫浴有限公司 | A kind of movable calcination supporting plate application technology of ceramics |
| CN112179137A (en) * | 2020-09-23 | 2021-01-05 | 江西荧光磁业有限公司 | Vacuum sintering furnace for processing neodymium iron boron magnet |
| CN112179137B (en) * | 2020-09-23 | 2022-08-23 | 江西荧光磁业有限公司 | Vacuum sintering furnace for processing neodymium iron boron magnet |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |