CN104185513B - The manufacture method of alloy sheet and the screening plant of alloy sheet - Google Patents
The manufacture method of alloy sheet and the screening plant of alloy sheet Download PDFInfo
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- CN104185513B CN104185513B CN201380012856.4A CN201380012856A CN104185513B CN 104185513 B CN104185513 B CN 104185513B CN 201380012856 A CN201380012856 A CN 201380012856A CN 104185513 B CN104185513 B CN 104185513B
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Abstract
A kind of manufacture method of alloy sheet, wherein, the sieve (13) of the pectination in the gap (16) with slit-shaped utilizing the fluid origin alloy sheet of band casting to be formed to the multiple teeth (15) configured by (W) at a prescribed interval is supplied, sieve (13) is made to vibrate, by the alloy sheet that the screening of this alloy sheet is the gap (16) having passed through slit-shaped and the alloy sheet remained on sieve (13), thus screening efficiently is flake alloy and abnormity alloy sheet, it is possible to manufacture the alloy sheet not being mixed into abnormity alloy sheet.In the case of the average thickness of the alloy sheet supplied to the sieve (13) of pectination is T, preferably the interval W of the tooth (15) of the sieve (13) of pectination is below 10T.
Description
Technical field
The present invention relates to the use of the sieve manufacture method to the alloy sheet utilizing the fluid origin alloy sheet of band casting to screen.
Further specifically, being directed to use with including the sieve of the slit become by comb shape and being screened efficiently by alloy sheet is flake alloy
Manufacture method with the alloy sheet of abnormity alloy sheet.It addition, relate to screen alloy sheet efficiently into flake alloy and
The screening plant of the alloy sheet of abnormity alloy sheet.
Background technology
It is the casting method of the alloy that can make motlten metal chilling with casting.Due to its quenching effect, use band casting,
The miniaturization of the crystal grain of cast alloy can be sought.It addition, former to the rare earth element magnet as Magnet excellent
When the R-T-B alloy that used of material casts, it is possible to suppress the magnetic characteristic of rare earth element magnet is brought dysgenic α-
The generation of Fe.Therefore, band casting is used in the casting of the alloy that the raw material of rare earth element magnet is used mostly.Here, " R-T-
B system alloy " in " R " refer to rare earth element, " T " is the transition elements that must include Fe, and " B " refers to boron.
The schematic diagram of the casting device that Fig. 1 is used when being and represent with band casting casting alloy band.Casting dress shown in Fig. 1
Put and include chamber 5, crucible 1, tundish 2 and chill roll 3.Chamber 5 maintains decompression state or nonactive gas by making inside
Bromhidrosis atmosphere, thus prevent molten alloy and fluid origin alloy strip oxidized.
In the case of using such casting device and utilizing band casting casting alloy band, for instance, it is possible to according to following
Step is carried out.
(A) raw material is loaded in crucible 1, use not shown induction heating apparatus that this raw material is heated, so that
This raw material melts, and forms molten alloy.
(B) by this molten alloy via outer peripheral face from tundish 2 to chill roll 3 supply time, due to chill roll 3 inside have
Having the structure for cold-producing medium circulation, therefore, molten alloy is solidified by chilling at the outer peripheral face of chill roll 3.It is fed into below
The situation that the molten alloy of the outer peripheral face of chill roll 3 is solidified by chilling also referred to as " melted pull " (Japanese: メ Le ト De ラ ッ
グ)。
(C) so, the alloy strip 4 of the thin ribbon shaped of thickness 0.1mm～1.0mm, chill roll 3 executing to Fig. 1 are cast out
The shaded direction shown in arrow rotates, and therefore, the alloy strip that accompanies with this 4 departs from (separation) from chill roll 3.
The alloy strip so utilizing the fluid origin thin ribbon shaped of band casting becomes laminar alloy sheet (below by crushing
Also referred to as " flake alloy ".), this alloy sheet is cooled according to the condition of regulation.In order to prevent the oxygen of alloy strip and alloy sheet
Changing, broken and alloy sheet the cooling of alloy strip generally under reduced pressure or is carried out under non-active gas atmosphere.
For the laminar alloy utilizing band casting to produce, proposed various motion in the past.Such as, patent documentation 1 institute
The method recorded is to have carried out fine terres rares after raw alloy coarse powder (flake alloy) has been carried out the process of suction hydrogen
The manufacture method of alloy powder, wherein, it is more than 2mm's that above-mentioned raw materials alloy coarse powder contains a maximum cun method for more than 50 mass %
Coarse powder.Thus, in patent documentation 1, it is possible to when the deterioration of the magnetic characteristic that suppression is caused by the increase of oxygen amount, suction hydrogen
Heating drastically, it is possible to the rare earth alloy powder that stably industry characteristics are excellent.It addition, having described in patent documentation 1
The content of the attritive powder that maximum very little method is below 250 μm is removed from raw alloy coarse powder (flake alloy).
Prior art literature
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 2006-283095 publication
Summary of the invention
The problem that invention is to be solved
But, when using band casting, from crucible to basket pouring time, or melt pull from tundish to chill roll
Time, it is inevitably generated path bulk alloy, thin slice welding alloy etc. and (the most also they is referred to as " abnormity alloy
Sheet ".).Therefore, abnormity alloy sheet is mixed into the laminar alloy as product sometimes.Path bulk alloy is due to molten alloy
Splashing and produce, thin slice welding alloy is that flake alloy is fused with one another and generate.
The rate of cooling during casting of such abnormity alloy sheet is different with the rate of cooling during casting of laminar alloy,
Therefore, compared with flake alloy, crystalline orientation sexual disorder sometimes, especially, in the case of for R-T-B system alloy, have
Time α-Fe containing ratio higher.
Therefore, distinguish and be mixed into the raw material of the rare earth element magnet that is made up of R-T-B system alloy at abnormity alloy sheet
In the case of, the magnetic characteristic of rare earth element magnet is produced harmful effect.I.e., in order to obtain the rare earth element magnet having excellent magnetic characteristics, need
The laminar alloy not being mixed into abnormity alloy sheet is used as raw material.In patent documentation 1, not to abnormity alloy sheet
The impact brought to the magnetic characteristic of rare earth element magnet is studied.It addition, in patent documentation 1, as removing attritive powder
Method, is enumerated and uses the sieve of the mesh with regulation to carry out the method sieved, but for the shape sieved, the size of mesh
Entirely without mentioning.
Here, the sieve used as screening, usually metal mesh screen (JISZ8801-1:2006).But, this sieve
The shape of mesh be square, regardless of the size of mesh, be not suitable for utilizing the sieve of the fluid origin alloy sheet of band casting
Point.Specifically, it is not suitable for from the mixture of flake alloy and abnormity alloy sheet, abnormity alloy sheet being sieved.
It reason for this is that, due to the phenomenon described in following (1) and (2), and sieve inefficient.
(1) in order to make abnormity alloy sheet remain in sieve upper and when reducing mesh, flake alloy also remains on sieve, screening
Efficiency reduce.
(2) contrary, when increasing mesh, although on the sieve of flake alloy, remaining quantity reduces, but abnormity alloy sheet
On sieve, remaining quantity reduces too.
The present invention makes in view of such situation, its object is to, it is provided that one can will utilize band casting system
The alloy sheet produced screens efficiently and is not mixed into abnormity alloy sheet for flake alloy and abnormity alloy sheet can manufacturing
The method of alloy sheet.It addition, its object is to, it is provided that alloy sheet can be screened efficiently as flake alloy and abnormity alloy
The screening plant of the alloy sheet of sheet.
For solving the scheme of problem
The screening technique of the alloy sheet utilizing band casting to produce, in order to solve the problems referred to above, is ground by the present inventor
Study carefully.Result has obtained following discovery.Expected by shape different that are conceived between flake alloy from abnormity alloy sheet
Use the sieve of the pectination in the gap with slit-shaped formed by the multiple teeth configured at a prescribed interval.Vibrate making this sieve
Time, only becoming the laminar alloy of the raised state gap by slit-shaped, abnormity alloy sheet remains in sieve, it is possible to efficiently
Screening flake alloy and abnormity alloy sheet.
The present invention is to complete based on above-mentioned discovery, with following (1) and the manufacture method of the alloy sheet of (2) and
The screening plant of the alloy sheet of following (3) is purport.
(1) manufacture method of a kind of alloy sheet, it is characterised in that the fluid origin alloy sheet of band casting will be utilized to by with rule
The sieve supply of the pectination in the gap with slit-shaped that multiple teeth of fixed interval configuration are formed, makes above-mentioned sieve vibrate, thus will
The alloy sheet that alloy sheet screening is the gap having passed through above-mentioned slit-shaped supplied and the alloy sheet remained on above-mentioned sieve.
(2) according to the manufacture method of the alloy sheet described in above-mentioned (1), it is characterised in that supplying to the sieve of above-mentioned pectination
The average thickness of alloy sheet be T in the case of, the tooth of the sieve of above-mentioned pectination be spaced apart below 10T.
(3) screening plant of a kind of alloy sheet, it is characterised in that the screening plant of this alloy sheet include by with regulation between
Sieve every the pectination in the gap with slit-shaped that multiple teeth of configuration are formed.
The effect of invention
The manufacture method of the alloy sheet according to the present invention, it is possible to the alloy sheet utilizing band casting to produce is screened efficiently
For flake alloy and abnormity alloy sheet, it is possible to manufacture the alloy sheet not being mixed into abnormity alloy sheet.
It addition, the screening plant of the alloy sheet according to the present invention, it is possible to alloy sheet is screened efficiently into flake alloy
With abnormity alloy sheet.
By using the alloy sheet produced by the manufacture method of the alloy sheet of the present invention or use to utilize the present invention's
The alloy sheet that the screening plant of alloy sheet filters out, it is possible to manufacture the rare earth element magnet having excellent magnetic characteristics.
Accompanying drawing explanation
The schematic diagram of the casting device that Fig. 1 is used when being and represent and utilize band casting casting alloy band.
Fig. 2 is the schematic diagram of the screening plant of the alloy sheet representing the present invention.
Fig. 3 is the partial enlarged drawing of sieve, and (a) of Fig. 3 is top view, and (b) of Fig. 3 is main sectional view.
Detailed description of the invention
The manufacture method of the alloy sheet of the present invention is as previously mentioned, it is characterised in that, the fluid origin alloy of band casting will be utilized
Sheet supplies to the sieve of the pectination in the gap with slit-shaped formed by the multiple teeth configured at a prescribed interval, makes above-mentioned sieve shake
Dynamic, thus the alloy sheet supplied is screened the alloy sheet in the gap for having passed through above-mentioned slit-shaped and remains on above-mentioned sieve
Alloy sheet.It addition, the screening plant of the alloy sheet of the present invention is characterised by, the inventive system comprises by a prescribed interval
The sieve of the pectination in the gap with slit-shaped that multiple teeth of configuration are formed.Below to the manufacture method of the alloy sheet of the present invention and
The reason being defined as described above and the preferred mode of the screening plant of the alloy sheet of the present invention illustrate.
Fig. 2 is the schematic diagram of the screening plant of the alloy sheet representing the present invention.Screening plant shown in Fig. 2 includes putting into material
Bucket 11, supply feeder 12, sieve 13, product container 17 and abnormity alloy sheet container 18.Sieve 13 is the sieve of pectination, has screening and holds
Device 14 and be arranged in multiple teeth 15 of inside of screened container 14, not shown vibrating device.Tooth 15 W at a prescribed interval joins
Put, be formed with the gap 16 of slit-shaped.
Fig. 3 is the partial enlarged drawing of sieve, (a) of Fig. 3 be top view, Fig. 3 (b) be main sectional view.(b) institute such as Fig. 3
Showing, it is upper flat and width is the narrowest downwards shape that the shape of tooth 15 has cross section.
Alloy sheet is fed in input hopper 11.This alloy sheet is by utilizing band casting fluid origin thin to aforesaid
The alloy strip of banding carries out broken and obtains, and has likely been mixed into path block in laminar alloy sheet (flake alloy)
The abnormity alloy sheet such as shape alloy, thin slice welding alloy.
It is put to put into the alloy sheet in hopper 11 and is supplied to feeder 12 by the amount of regulation separately, at supply feeder
Carried in 12, to sieve 13 supply.Utilize not shown vibrating device to sieve 13 applying vibration, accompany with this, be supplied to sieve 13
Alloy sheet vibration.
When laminar alloy in alloy sheet becomes raised state due to vibration, when i.e. thickness direction becomes level,
The effect of gravity is lower and passes through the gap 16 of slit-shaped, falls to the bottom surface of screened container 14.On the other hand, abnormity alloy sheet
Path bulk alloy and thin slice welding alloy are all difficult to by vibration by gap 16.Its reason is, block for path
Alloy, generally, even if the part of diameter minimum also has the diameter of 2 times of the thickness of laminar alloy.It addition, melt for thin slice
Engage gold, owing to being that multiple flake alloy overlap forms, the most at least there is the portion of the thickness of more than 2 times of laminar alloy
Point.Therefore, abnormity alloy sheet is mixed into the laminar alloy having passed through gap 16 hardly, it is possible to screening flake efficiently is closed
Gold.
The laminar alloy of the bottom surface dropping to screened container 14 carries to product container 17 and is housed by product container 17,
Remain in sieve 13 on alloy sheet as abnormity alloy sheet to abnormity alloy sheet container 18 carry and by abnormity alloy sheet container 18
House.
The screening plant of the alloy sheet of the manufacture method of the alloy sheet of the present invention or the present invention is being applied to terres rares
In the case of the manufacture of the raw material of Magnet, the rare earth element magnet used as raw material by the laminar alloy obtained will not be
Raw material is mixed into abnormity alloy sheet, therefore, has had excellent magnetic characteristics.Abnormity alloy it has been mixed in the raw material of rare earth element magnet
In the case of sheet, i.e. path bulk alloy, thin slice welding alloy etc., bring dysgenic reason as described below.
Path bulk alloy be in the manufacture process utilizing band casting to carry out from crucible to during basket pouring due to molten
Merge the splashing of gold and produce.It addition, thin slice welding alloy be molten alloy by from tundish to chill roll melt pull time
Flake alloy is fused with one another and generates.
Above-mentioned abnormity alloy sheet is compared with the laminar alloy of cooled roller chilling, and setting rate is relatively slow, therefore, and alloy
Uneven microstructure.Specifically, setting rate is slack-off, therefore, and alloy structure coarsening sometimes.Further, since the composition of alloy,
The difference of composition system, the most above-mentioned abnormity alloy sheet includes due to the peritectoid region by R-Fe-B pseudobinary system alloy
α-the Fe etc. of the soft magnetism crystallized out.Close here, " R-Fe-B pseudobinary system alloy " is contained in above-mentioned R-T-B system
Gold.
When the uneven special-shaped alloy sheet of such alloy structure is mixed into the laminar alloy as product, to terres rares magnetic
The powder characteristics of the comminuted powder of the alloy in the manufacturing process of ferrum, forming characteristic bring harmful effect, and then until to sintering
Property, magnetic characteristic bring harmful effect.
Thus, the screening plant of the alloy sheet of the manufacture method of the alloy sheet of the present invention or the present invention is being applied to dilute
In the case of the manufacture of the raw material of great soil group Magnet, the laminar alloy obtained is pulverized and the powder body of powder that obtains is special
Property, forming characteristic and agglutinating property become good.Thereby, it is possible to make the rare earth used using the laminar alloy obtained as raw material
Class Magnet improves magnetic characteristic.
The interval W of the tooth sieve less than 1mm is compared with the sieve that W is more than 1mm, and manufacturing cost uprises.It addition, as it has been described above,
The thickness utilizing the alloy strip of the fluid origin thin ribbon shaped of band casting is 0.1mm～1.0mm.Therefore, at the alloy sheet of the present invention
In the screening plant of the alloy sheet of manufacture method or the present invention, the average thickness of the alloy sheet to sieve supply is being set to T's
In the case of, the interval W of the tooth preferably sieved is below 10T.
It addition, the interval W of the tooth more preferably sieved is below 4T.This is the flake conjunction that the present inventor is certified products to screening
The thickness of gold, the special-shaped alloy sheet of impact is brought to carry out the value that institute in detail finds to the magnetic characteristic of rare earth element magnet.Will
The interval W of the tooth of sieve is set to below 4T, and suitably adjusts the vibration applying sieve such that it is able to screen efficiently.
It addition, when the manufacture of alloy sheet, in course of conveying, produce a little micropowder the most under the influence of vibrations.Should
Micropowder is oxidized easily, therefore, especially when being used as the raw material of rare-earth sintered magnet by alloy sheet, in sintering circuit
In can become bad will be because of.Therefore, in the manufacture method of the alloy sheet of the present invention, for the laminar alloy filtered out, excellent
Choosing uses the circular screen of the mesh of such as below 1mm to remove the micropowder of alloy.
Embodiment
In order to the effect of the screening plant of the alloy sheet of the manufacture method of the alloy sheet of the present invention and the present invention is tested
Card, has carried out following test.
Test method
In this test, use the R-T-B system alloy of 600kg (containing Nd:30 mass % and B:1 mass % and remain
Remaining part divides the alloy being made up of Fe) molten alloy, utilize band casting to obtain the alloy strip of thin ribbon shaped.Alloy strip during manufacture
Target thickness T be 0.5mm.With 30kg/min～50kg/min, this alloy strip is cut out from feeder, nonactive to being filled with
The destroyer of gas puts into and implements break process.In the alloy sheet obtained by crushing, to 100 arbitrarily extracted out
The meansigma methods of major diameter, minor axis and thickness that alloy sheet is measured is respectively 6.3mm, 4.5mm and 0.52mm.
The alloy sheet obtained by crushing utilizes sieve to filter out flake alloy and abnormity alloy sheet.The sieve carried out by sieve
Choosing is carried out under the conditions shown in Table 1.The laminar alloy filtered out forms Magnet so that method described later is sintered.
[table 1]
In a comparative example, the size of the mesh for sieving
As shown in table 1, in example 1～3 of the present invention, as sieve, use as shown in above-mentioned Fig. 2 and Fig. 3 by with regulation
The sieve of the pectination in the gap with slit-shaped that multiple teeth of interval configuration are formed, utilizes vibrating device to make sieve vibrate.Vibrator bar
Part is as follows: amplitude is 4.9mm～6.1mm, and frequency is 906cpm.For the interval W of tooth, it is 1.0mm in example 1 of the present invention,
Example 2 of the present invention is 2.0mm, in example 3 of the present invention, for 2.5mm.Between interval W and the average thickness T of alloy sheet of these teeth
Relation be respectively equivalent to W=2T, 4T and 5T.
Comparative example is existing method, as sieve, uses Taylor's wire-mesh screen of mesh 5.6mm, vibrates with manually making sieve.
Sintered magnet
The laminar alloy filtered out by sieve is with hydrogen pressure 2kg/cm2Carry out hydrogenation to pulverize, enter with 500 DEG C the most in a vacuum
The row Dehydroepiandrosterone derivative of 1 hour, thus it is broken (coarse pulverization) to have carried out hydrogen.Use high purity N2And with 6kg/cm2Gas pressure,
With jet pulverizer, the corase meal after coarse pulverization is pulverized, thus obtained attritive powder.Particle diameter is carried out with air permeability method
Measuring, the mean diameter obtaining this attritive powder is 3.1 μm.
By the attritive powder that obtains at 2500kAm-1Vertical magnetic field in carry out stamping with pressure 150MPa, thus
Define powder compact.This powder compact is sintered 3 hours at 1050 DEG C, forms sintered body, at 600 DEG C, this sintered body is implemented
The heat treatment of 1 hour, thus be formed as permanent magnet.
After the sintered body implementing heat treatment being cut into 10mm is square, with surface grinding machine its end face is ground and
Define sintered magnet.With B-H measuring instrument (Japanese: ト レ サ) to the coercive force (iHc) of the sintered magnet obtained and residual
Magnetic flux density (Br) is stayed to be measured.
Result of the test
Illustrate together with the condition of sieve in Table 1 the weight of alloy sheet reclaimed as abnormity alloy sheet and the response rate,
And illustrate the value of iHc and Br of the magnetic characteristic as sintered magnet.Recovery as the alloy sheet that abnormity alloy sheet reclaims
Rate refers to, the molten alloy of 600kg used when the weight of the alloy sheet reclaimed as abnormity alloy sheet is relative to casting
Ratio.
In the case of employing the sieve of pectination in the gap with slit-shaped (example 1～3 of the present invention), the interval of tooth is more
Little, the weight as the alloy sheet of abnormity alloy sheet recovery is the most, and the response rate is the best.It addition, employing Taylor's wire netting
In the comparative example of sieve, compared with any one condition in example 1～3 of the present invention, as the weight of the alloy sheet that abnormity alloy sheet reclaims
Measuring less, the response rate is poor.
The magnetic characteristic of sintered magnet in example 1～3 of the present invention be iHc be more than 9.8kOe, Br be more than 13.5kG so
Excellent value.Especially in the example of the present invention 1 and 2 that interval W is below 4T of the tooth of the sieve of pectination, it it is more excellent value.But
It is that, in example 1 and 2 of the present invention, magnetic characteristic does not has bigger difference.In a comparative example, iHc=9.5kOe and Br=13.0kG,
For the value than present invention example 1～3 difference.
Can be clear and definite from these: be there is the sieve of the pectination in the gap of slit-shaped by use, it is possible to cast utilizing band casting
The alloy sheet caused screens efficiently as flake alloy and abnormity alloy sheet.It addition, also be able to clearly: be not mixed into by using
There is the alloy sheet of special-shaped alloy sheet, it is possible to obtain the Magnet of the magnetic characteristic with excellence.
Industrial applicability
The manufacture method of the alloy sheet according to the present invention, it is possible to the alloy sheet utilizing band casting to produce is screened efficiently
For flake alloy and abnormity alloy sheet, it is possible to manufacture the alloy sheet not being mixed into abnormity alloy sheet.
It addition, the screening plant of the alloy sheet according to the present invention, it is possible to alloy sheet is screened efficiently into flake alloy
With abnormity alloy sheet.
By using the alloy sheet produced by the manufacture method of the alloy sheet of the present invention or using the alloy of the present invention
The alloy sheet that the screening plant of sheet filters out, it is possible to manufacture the rare earth element magnet having excellent magnetic characteristics.
Description of reference numerals
1, crucible；2, tundish；3, chill roll；4, alloy strip；5, chamber；6, motlten metal；11, hopper is put into；12, supply
To feeder；13, sieve；14, screened container；15, tooth；16, gap；17, product container；18, abnormity alloy sheet container.
Claims (3)
1. the manufacture method of an alloy sheet, it is characterised in that
The fluid origin alloy sheet of band casting will be utilized to the slit-shaped that has formed by the multiple teeth configured at a prescribed interval
The sieve supply of the pectination in gap, makes above-mentioned sieve vibrate, thus screens the alloy sheet supplied for have passed through above-mentioned slit-shaped
The laminar alloy in gap and the special-shaped alloy sheet remained on above-mentioned sieve.
The manufacture method of alloy sheet the most according to claim 1, it is characterised in that
In the case of the average thickness of the alloy sheet to the sieve supply of above-mentioned pectination is T, the interval of the tooth of the sieve of above-mentioned pectination
For below 10T.
3. a screening plant for alloy sheet, it will utilize the screening of band casting fluid origin alloy sheet for flake alloy and abnormity
Alloy sheet, it is characterised in that
This screening plant includes the sieve of the pectination in the gap with slit-shaped formed by the multiple teeth configured at a prescribed interval.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-051144 | 2012-03-08 | ||
| JP2012051144A JP5706841B2 (en) | 2012-03-08 | 2012-03-08 | Alloy piece manufacturing method and alloy piece sorting apparatus |
| PCT/JP2013/001097 WO2013132780A1 (en) | 2012-03-08 | 2013-02-26 | Method for manufacturing alloy pieces and apparatus for sorting alloy pieces |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104185513A CN104185513A (en) | 2014-12-03 |
| CN104185513B true CN104185513B (en) | 2016-11-30 |
Family
ID=
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4265742A (en) * | 1977-07-25 | 1981-05-05 | Hermann Screens Manufacturing Company (Proprietary) Limited | Screen element |
| JPH10113615A (en) * | 1996-10-11 | 1998-05-06 | Naoyoshi Kayama | Solids sorting device |
| CN2303687Y (en) * | 1995-06-05 | 1999-01-13 | 河南拓普炼铁技术联合开发公司 | Comb-teeth shape combined sieve bottom |
| JP2004163415A (en) * | 2002-10-07 | 2004-06-10 | Kawasaki Heavy Ind Ltd | Radioactive waste sorting system |
| WO2006131333A2 (en) * | 2005-06-08 | 2006-12-14 | Doppstadt Calbe Gmbh | Screening device |
| JP2007270164A (en) * | 2006-03-30 | 2007-10-18 | Tdk Corp | Method for producing rare earth permanent magnet |
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4265742A (en) * | 1977-07-25 | 1981-05-05 | Hermann Screens Manufacturing Company (Proprietary) Limited | Screen element |
| CN2303687Y (en) * | 1995-06-05 | 1999-01-13 | 河南拓普炼铁技术联合开发公司 | Comb-teeth shape combined sieve bottom |
| JPH10113615A (en) * | 1996-10-11 | 1998-05-06 | Naoyoshi Kayama | Solids sorting device |
| JP2004163415A (en) * | 2002-10-07 | 2004-06-10 | Kawasaki Heavy Ind Ltd | Radioactive waste sorting system |
| WO2006131333A2 (en) * | 2005-06-08 | 2006-12-14 | Doppstadt Calbe Gmbh | Screening device |
| JP2007270164A (en) * | 2006-03-30 | 2007-10-18 | Tdk Corp | Method for producing rare earth permanent magnet |
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Effective date of registration: 20160530 Address after: Wakayama County Applicant after: Wakayama Rare Earth Co., Ltd. Address before: Tokyo, Japan, Japan Applicant before: Chuo Denki Kogyo Co., Ltd. |
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Effective date of registration: 20170523 Address after: Hyogo Patentee after: Santoku Corp. Address before: Wakayama County Patentee before: Wakayama Rare Earth Co., Ltd. |