JPH0630312B2 - Mold for magnetic field compression molding - Google Patents
Mold for magnetic field compression moldingInfo
- Publication number
- JPH0630312B2 JPH0630312B2 JP59095972A JP9597284A JPH0630312B2 JP H0630312 B2 JPH0630312 B2 JP H0630312B2 JP 59095972 A JP59095972 A JP 59095972A JP 9597284 A JP9597284 A JP 9597284A JP H0630312 B2 JPH0630312 B2 JP H0630312B2
- Authority
- JP
- Japan
- Prior art keywords
- die
- magnetic field
- magnetic
- compression molding
- mold
- 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.)
- Expired - Lifetime
Links
- 230000005291 magnetic effect Effects 0.000 title claims description 40
- 238000000748 compression moulding Methods 0.000 title claims description 11
- 239000000696 magnetic material Substances 0.000 claims description 18
- 239000000843 powder Substances 0.000 claims description 8
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 8
- 150000002910 rare earth metals Chemical class 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 description 9
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000003302 ferromagnetic material Substances 0.000 description 3
- 229910001315 Tool steel Inorganic materials 0.000 description 2
- 239000006247 magnetic powder Substances 0.000 description 2
- 229910001347 Stellite Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- AHICWQREWHDHHF-UHFFFAOYSA-N chromium;cobalt;iron;manganese;methane;molybdenum;nickel;silicon;tungsten Chemical compound C.[Si].[Cr].[Mn].[Fe].[Co].[Ni].[Mo].[W] AHICWQREWHDHHF-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000035699 permeability Effects 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
- H01F41/0253—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 for manufacturing permanent magnets
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Powder Metallurgy (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Description
【発明の詳細な説明】 〔技術分野〕 本発明は、樹脂結合型ラジアル異方性希土類磁石の磁場
中圧縮成形用金型の構造に関する。TECHNICAL FIELD The present invention relates to a structure of a mold for magnetic field compression molding of a resin-bonded radial anisotropic rare earth magnet.
従来、ラジアル異方性を有する樹脂結合型希土類圧縮成
形磁石を製作するにあたっては、第１図のように互に反
発する磁場を発生する２個のコイル４，５に、磁性体材
料よりなるコア１，２，同じく磁性体材料よりなるダイ
ス３を組み合せ圧縮成形用金型として用い前記のコア
１，２、及びダイス３からなる型内部に放射状のラジア
ル配向磁場を発生させ磁場中圧縮成形をした。Conventionally, in producing a resin-bonded rare earth compression-molded magnet having radial anisotropy, two coils 4 and 5 for generating mutually repulsive magnetic fields have cores made of a magnetic material as shown in FIG. 1, 2, a die 3 also made of a magnetic material was used as a combination compression molding die, and a radial radial orientation magnetic field was generated inside the die composed of the core 1, 2 and the die 3 to perform compression molding in a magnetic field. .
しかし、この方法では磁場を加える時に型内部に充填し
た樹脂結合型希土類磁石粉末８が、前記型より外部にこ
ぼれないようにするため、あらかじめダイス３に、非磁
性材料よりなるパンチ６，７の先端部を、挿入した状態
で磁場を加えていた。このため、ダイス３の端面部の長
さに比較して前記磁石粉末８と接する部分の長さが小さ
くなり、よって全体の磁場に比較して、直接前記磁石粉
末８に作用する磁場が低くなるという欠点があった。However, in this method, in order to prevent the resin-bonded rare earth magnet powder 8 filled in the mold when a magnetic field is applied from spilling out of the mold, the die 3 is preliminarily provided with punches 6 and 7 made of a non-magnetic material. The magnetic field was applied with the tip inserted. Therefore, the length of the portion in contact with the magnet powder 8 is smaller than the length of the end surface of the die 3, and thus the magnetic field directly acting on the magnet powder 8 is lower than the entire magnetic field. There was a drawback.
〔目的〕 本発明は、このような問題を解決するためのもので、そ
の目的とするところは一部品を変更するのみで、放射状
に発生させたラジアル配向磁場の全てを、型内部に充填
した磁石粉末に作用させることができる磁場中圧縮成形
用金型を提供することにある。[Purpose] The present invention is to solve such a problem, and the purpose thereof is to change only one part, and to fill all of the radially-oriented radial orientation magnetic field in the mold. It is an object of the present invention to provide a mold for compression molding in a magnetic field that can act on magnet powder.
本考案の磁場中圧縮成形用金型は、磁性体材料よりなる
ダイスの両側面に、あらかじめパンチ先端部に挿入長さ
に相当する厚みの透磁率μ＝1.05以下の非磁性材料より
なる金属板をネジ止メにより固定して層状にしたことを
特徴とする。The mold for magnetic field compression molding of the present invention is a metal plate made of a non-magnetic material having a permeability μ = 1.05 or less on both sides of a die made of a magnetic material and having a thickness corresponding to the insertion length at the tip of the punch in advance. Is fixed by a screw stopper to form a layer.
以下、実施例にもとづき詳細に説明する。 Hereinafter, detailed description will be given based on Examples.
第２図は本実施例の断面図であり、先ず上シリンダー２
６を作動させ、非磁性材料よりなる上パンチ１６，強磁
性体材料であり金型としての硬さを持った材料よりなる
上コア１１，強磁性体材料よりなる磁気回路２４を引き
上げ、前記上コアと同材質の下コ１２と、強磁性体材料
であり金型としての硬度，強度を持った材料、例えば合
金工具鋼ＳＫＤ１１を熱処理して硬度を持たせたダイス
１３と、前記上パンチと同材質よりなる下パンチ１７と
に囲まれた空間に樹脂結合型希土類磁石粉末１８を充填
する。この時、ダイス１３の両側面には、あらじめ上パ
ンチ１６及び下パンチ１７先端部の挿入長さに相当する
厚さの上非磁性板材２２と、下非磁性板材２２、例えば
透磁率μ＝1.05以下の非磁性材料であるオーステナイト
系ステンレス鋼，工具鋼であるステライトなどを、同じ
く非磁性材料よりなる上止メネジ２０及び下止メネジ２
１により固定して置く。FIG. 2 is a sectional view of this embodiment. First, the upper cylinder 2
6 is operated to pull up the upper punch 16 made of a non-magnetic material, the upper core 11 made of a ferromagnetic material having a hardness as a die, and the magnetic circuit 24 made of a ferromagnetic material. A lower core 12 made of the same material as the core, a material which is a ferromagnetic material and has hardness and strength as a die, for example, a die 13 obtained by heat-treating an alloy tool steel SKD11, and the upper punch. A resin-bonded rare earth magnet powder 18 is filled in the space surrounded by the lower punch 17 made of the same material. At this time, the upper non-magnetic plate material 22 and the lower non-magnetic plate material 22 having a thickness corresponding to the insertion lengths of the tips of the upper punch 16 and the lower punch 17 are provided on both side surfaces of the die 13, respectively. = 1.05 or less non-magnetic material such as austenitic stainless steel, tool steel such as stellite, upper stop female screw 20 and lower stop female screw 2 also made of non-magnetic material 2
Fix by 1 and put.
つぎに上シリンダー２６を作動させ、上コア１１及び上
磁気回路２４を下げ、さらに上パンチ１６を前記のダイ
ス１３に上非磁性板材２２の厚さ分挿入する。ここで上
コイル１４と下コイル１５に通電し互に反発する磁場を
発生し、前記空間部に磁力線１９による放射状のラジア
ル配向磁場を発生させ、樹脂結合型希土類磁石粉末１８
にラジアル磁気異方性を持たせ、前記の上シリンダー２
６を作動させ加圧成形する。この状態で上コイル１４
と、下コイル１５に先程と逆方向に所定の電流を流し、
配向時と逆方向の磁力線を発生させ、前記の加圧成形さ
れた磁石を減磁する。つぎに上シリンダー２６により、
上パンチ１６，上コア１１，上磁気回路２４を引き上
げ、さらに下シリンダー２７を作動させ、加圧成形され
た樹脂結合型希土類磁石を下パンチ１７により、ダイス
１３より押し出し、除材し一工程を終了する。第３図
に、ダイス内径２０mm，コア外径１７mm，ダイス端面部
長さ８mmで上パンチ，下パンチの挿入部各１mmの時の本
実施例によるダイス磁性材長さ６mmの時のコイル電流と
発生磁場との関係をに、従来技術の８mmの時の関係を
に示す。本実施例では、ダイス両側面の非磁性材料に
よる金属をそれぞれ上下別々にネジ止メして固定してい
るが１本のネジで上下を固定しても良くまた、溶接、圧
接等でも同様の効果が得られる。Next, the upper cylinder 26 is operated to lower the upper core 11 and the upper magnetic circuit 24, and the upper punch 16 is inserted into the die 13 by the thickness of the upper non-magnetic plate material 22. Here, the upper coil 14 and the lower coil 15 are energized to generate a magnetic field repulsive to each other, and a radial radial orientation magnetic field is generated by the magnetic force lines 19 in the space, and the resin-bonded rare earth magnet powder 18 is generated.
Radial magnetic anisotropy in the upper cylinder 2
6 is operated to perform pressure molding. The upper coil 14 in this state
Then, a predetermined current is applied to the lower coil 15 in the opposite direction to the above,
Magnetic lines of force in the direction opposite to the orientation are generated to demagnetize the pressure-molded magnet. Next, with the upper cylinder 26,
The upper punch 16, the upper core 11, and the upper magnetic circuit 24 are pulled up, the lower cylinder 27 is further operated, and the pressure-molded resin-bonded rare earth magnet is extruded from the die 13 by the lower punch 17 to remove the material, and one step is performed. finish. FIG. 3 shows the coil current and the generation when the die magnetic material length is 6 mm according to this embodiment when the die inner diameter is 20 mm, the core outer diameter is 17 mm, the die end surface length is 8 mm, and the upper punch and lower punch insertion portions are 1 mm each. The relationship with the magnetic field is shown in, and the relationship with the prior art at 8 mm is shown in. In this embodiment, the metal made of the non-magnetic material on both side surfaces of the die is fixed by screwing the upper and lower parts separately, but the upper and lower parts may be fixed by a single screw. The effect is obtained.
以上述べたように、本発明は、磁性体材料よりなるダイ
スの両側面に非磁性体よりなる金属板を層状になるよう
に取り付けたので、従来、上下パンチ挿入分の長さだけ
厚くなっていたダイスが薄くなり、磁性体よりなるコア
を利用して樹脂結合型ラジアル異方性圧縮成形希土類磁
石を磁場中圧縮成形する金型において、前記樹脂結合型
希土類磁石粉末に作用する配向磁場が向上する効果を有
する。成形条件を変えることなく配向磁場を向上させる
時に非常に有効であり、また従来と同等の配向磁場で成
形する場合は、上・下コイルに通電する電流を少なくす
ることができるため電流によるコイルの発熱が少くな
り、また電源設備を小さくすることができるため設備費
を安くできる効果も有する。As described above, according to the present invention, since the metal plates made of a non-magnetic material are attached in layers on both sides of the die made of a magnetic material, the thickness is increased by the length corresponding to the vertical punch insertion. The die becomes thinner, and the magnetic field that acts on the resin-bonded rare-earth magnet powder is improved in the mold for compression-molding the resin-bonded radial anisotropic compression molding in the magnetic field using the core made of magnetic material. Have the effect of It is very effective in improving the orientation magnetic field without changing the forming conditions. Also, when forming with the same orientation magnetic field as the conventional one, the current flowing through the upper and lower coils can be reduced, so Since the heat generation is small and the power supply equipment can be downsized, the equipment cost can be reduced.
第１図は従来技術、第２図は本発明による実施例を、第
３図はラジアル配向磁場をそれぞれ示す図である。 １……上コア、２……下コア ３……ダイス、４……上コイル ５……下コイル、６……上パンチ ７……下パンチ、８……磁石粉末 ９……磁力線、１１……上コア １２……下コア、１３……ダイス １４……上コイル、１５……下コイル １６……上パンチ、１７……下パンチ １８……磁石粉末、１９……磁力線 ２０……上止メネジ、２１……下止メネジ ２２……上非磁性板材 ２３……下非磁性板材、２４……上磁気回路 ２５……下磁気回路、２６……上シリンダー ２７……下シリンダー ａ……本実施例による発生磁場 ｂ……従来技術による発生磁場FIG. 1 is a prior art, FIG. 2 is an embodiment according to the present invention, and FIG. 3 is a diagram showing a radial orientation magnetic field. 1 ... Upper core, 2 ... Lower core 3 ... Die, 4 ... Upper coil 5 ... Lower coil, 6 ... Upper punch 7 ... Lower punch, 8 ... Magnetic powder 9 ... Magnetic field, 11 ... ... Upper core 12 ... Lower core, 13 ... Die 14 ... Upper coil, 15 ... Lower coil 16 ... Upper punch, 17 ... Lower punch 18 ... Magnetic powder, 19 ... Magnetic line 20 ... Top stop Female screw, 21 ... Lower female screw 22 ... Upper non-magnetic plate material 23 ... Lower non-magnetic plate material, 24 ... Upper magnetic circuit 25 ... Lower magnetic circuit, 26 ... Upper cylinder 27 ... Lower cylinder a ... Book Generated magnetic field according to Example b ... Generated magnetic field according to conventional technology
Claims (1)
りなるコアと非磁性材料からなるパンチとからなり、樹
脂結合型ラジアル異方性希土類磁石の磁場中圧縮成形に
用いる磁場中圧縮成形用金型において、前記ダイスの磁
性体材料部分の厚さが前記ダイスと前記コアと前記パン
チに囲まれた磁石粉末充填部の厚さと等しくなるよう前
記ダイスの両端面に非磁性材料よりなる金属板を固定し
たことを特徴とする磁場中圧縮成形用金型。1. A magnetic field compression molding used for magnetic field compression molding of a resin-bonded radial anisotropic rare earth magnet, comprising a die made of a magnetic material, a core made of a magnetic material, and a punch made of a non-magnetic material. In the die, metal plates made of a non-magnetic material on both end faces of the die so that the thickness of the magnetic material portion of the die becomes equal to the thickness of the magnet powder filling portion surrounded by the die, the core and the punch. A mold for compression molding in a magnetic field, characterized in that it is fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59095972A JPH0630312B2 (en) | 1984-05-14 | 1984-05-14 | Mold for magnetic field compression molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59095972A JPH0630312B2 (en) | 1984-05-14 | 1984-05-14 | Mold for magnetic field compression molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60240112A JPS60240112A (en) | 1985-11-29 |
| JPH0630312B2 true JPH0630312B2 (en) | 1994-04-20 |
Family
ID=14152088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59095972A Expired - Lifetime JPH0630312B2 (en) | 1984-05-14 | 1984-05-14 | Mold for magnetic field compression molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0630312B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02275609A (en) * | 1989-01-13 | 1990-11-09 | Sankyo Seiki Mfg Co Ltd | Magnetic field formation mold |
| JPH0628215B2 (en) * | 1989-04-24 | 1994-04-13 | 富士電気化学株式会社 | Manufacturing method of radial oriented magnet |
| CN109923629A (en) * | 2016-11-09 | 2019-06-21 | Tdk株式会社 | The manufacturing method of rare-earth magnet |
| CN110783093B (en) * | 2019-12-17 | 2025-02-14 | 西南应用磁学研究所 | A device and method for preparing highly oriented samarium cobalt permanent magnet |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57148567A (en) * | 1981-03-09 | 1982-09-13 | Hitachi Metals Ltd | Cylindrical magnet and manufacture thereof |
-
1984
- 1984-05-14 JP JP59095972A patent/JPH0630312B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60240112A (en) | 1985-11-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7847460B2 (en) | Yoke-integrated bonded magnet and magnet rotator for motor using the same | |
| EP0129052A1 (en) | Method of producing cylindrical permanent magnet | |
| CN112825279A (en) | Composite magnet and method of manufacturing composite magnet | |
| CN101103422B (en) | Process for producing radially anisotropic magnet | |
| US3274303A (en) | Method and apparatus for making magnetically anisotropic permanent magnets | |
| JPS6150368B2 (en) | ||
| JPH0630312B2 (en) | Mold for magnetic field compression molding | |
| CN112825280A (en) | Composite magnet and method of manufacturing composite magnet | |
| CN100392778C (en) | Magnet manufacturing method, magnetic powder molding method, and dry molding apparatus | |
| JP3851281B2 (en) | Magnetic powder filling apparatus, magnetic powder filling method, and neodymium sintered magnet manufacturing method | |
| JP2001192705A (en) | Method of manufacturing for compact of rare earth alloy powder, compaction device, and rare earth magnet | |
| EP0265016A2 (en) | Process of making a permanent magnet | |
| JP2004259850A (en) | Ring-type magnet and manufacturing method thereof | |
| JP4392606B2 (en) | Molding apparatus and molding method | |
| JP3639584B1 (en) | Magnetic field orientation molding device and orientation magnetic field generator | |
| JP2005020987A (en) | Electromagnetic member manufacturing method and electromagnetic member | |
| JP3538762B2 (en) | Method for producing anisotropic bonded magnet and anisotropic bonded magnet | |
| JP4715077B2 (en) | Magnet powder press molding apparatus and method for producing magnet powder compact | |
| JPH06330103A (en) | Die for compacting magnetic powder | |
| JPH05239505A (en) | Magnetic-field press die of ferrite magnet for micromotor | |
| JPH11195548A (en) | Method for producing Nd-Fe-B-based magnet | |
| JPS61171112A (en) | Metal mold for forming permanent magnet material | |
| JP3079348B2 (en) | Manufacturing method of radially oriented magnet | |
| JP4470112B2 (en) | Molding equipment | |
| JPS60214515A (en) | Manufacture of cylindrical permanent magnet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |