JPS64807B2 - - Google Patents
Info
- Publication number
- JPS64807B2 JPS64807B2 JP57184368A JP18436882A JPS64807B2 JP S64807 B2 JPS64807 B2 JP S64807B2 JP 57184368 A JP57184368 A JP 57184368A JP 18436882 A JP18436882 A JP 18436882A JP S64807 B2 JPS64807 B2 JP S64807B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- magnetic field
- slurry
- hole
- poles
- 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
Links
- 229910000859 α-Fe Inorganic materials 0.000 claims description 21
- 239000002002 slurry Substances 0.000 claims description 19
- 238000000465 moulding Methods 0.000 claims description 14
- 239000000843 powder Substances 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 8
- 239000002245 particle Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000000696 magnetic material Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000748 compression moulding Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 230000005405 multipole Effects 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910001004 magnetic alloy Inorganic materials 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000004576 sand Substances 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)
- Hard Magnetic Materials (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Description
【発明の詳細な説明】
本発明は異方性フエライト磁石の製造に関する
もので、特に、半径方向に異方性を与えるための
磁性スラリーの磁場中成型装置に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the production of anisotropic ferrite magnets, and in particular to an apparatus for molding magnetic slurry in a magnetic field to impart anisotropy in the radial direction.
フエライト磁石のプレス成型工程において、フ
エライト磁石粒子が分子式MO・6Fe2O3（Ｍは
Ba，Sr，Pbの一種）をもつマグネトプランバイ
ト相の板状の六方晶系の構造をとり、六回対称軸
の方向に磁気容易軸（Ｃ軸）をとることからこの
性質を利用し、磁場印加などでＣ軸方向をそろえ
るものとそろえないものと大別され、前者を異方
性磁石、後者を等方性磁石と呼び、一般に市販さ
れている。また、異方性磁石の成型においては、
フエライト磁石粉末を金型に充填して、圧縮成型
する方法と、フエライト磁石粉末を水等の液体に
懸濁した泥漿（スラリー）として圧縮成型する方
法が知られており、前者は乾式法、後者は湿式法
と呼ばれ、湿式法は、フエライト磁石粒子の配向
性に秀れ、磁石特性は乾式法に比し格段に透れて
いる。すなわち、磁石特性が一番高いものは湿式
の異方性磁石である。プレス圧縮方向と粒子のＣ
軸方向を同一方向とした異方性磁石としてスピー
カ用に多く供されている。 In the press molding process of ferrite magnets, ferrite magnet particles have a molecular formula of MO・6Fe 2 O 3 (M is
It takes advantage of this property because it has a plate-like hexagonal structure of magnetoplumbite phase with a type of magnetoplumbite (Ba, Sr, Pb), and the magnetic easy axis (C axis) is in the direction of the six-fold symmetry axis. Magnets are broadly classified into those whose C-axis directions are aligned by applying a magnetic field and those which are not aligned, and the former are called anisotropic magnets, and the latter are called isotropic magnets, and are generally commercially available. In addition, when molding anisotropic magnets,
There are two known methods: filling a mold with ferrite magnet powder and compression molding it, and compression molding the ferrite magnet powder as a slurry suspended in a liquid such as water. This is called a wet method, and the wet method has excellent orientation of ferrite magnet particles, and the magnetic properties are much better than the dry method. That is, the wet anisotropic magnet has the highest magnetic properties. Press compression direction and particle C
It is often used for speakers as an anisotropic magnet whose axial directions are in the same direction.
ところで、マイクロモータあるいはダイナモ発
電機用の磁石として円筒状磁石が用いられている
が、これらは等方性磁石であつた。この為磁石特
性が低く、トルクあるいは起電力が小さかつた。
これらを解決するため第１図に示すように、フエ
ライト磁石の円筒の半径方向の多極の磁場で異方
性化することが提案されている。 By the way, cylindrical magnets are used as magnets for micro motors or dynamo generators, but these are isotropic magnets. Therefore, the magnetic properties were low, and the torque or electromotive force was small.
In order to solve these problems, it has been proposed to create anisotropy using a multipolar magnetic field in the radial direction of a cylindrical ferrite magnet, as shown in FIG.
従来、フエライトの磁場成型においては、電磁
石により磁場印加を行うのが普通である。しかし
ながら、半径方向に多極の磁場を印加する場合、
電磁石を用いるには多くの困難が伴なう。必要と
する磁場を発生させるためには電磁石は大きくな
る。それ故電磁石の設置スペースが限られ、極間
のピツチが30mm以下のように小さい場合には、極
めて細い線を用いて電磁石を小型に構成すること
が必要になる。細い線を用いるとそれだけ抵抗値
が大となるので、所要の電流を流した場合の発熱
量が多くなり、線の被覆が破壊される不都合が生
ずる。あるいは、電源の条件によつては、所要の
電流さえ流せなくなる恐れがある。しかも、湿式
法の磁場成型では、水を過しつつ粉体の密度が
粗の状態から密の状態になるまで磁場の印加が必
要で、配向すべき磁場の持続時間は10数秒から60
秒と長い時間を必要とするため、発熱は大きな問
題となる。したがつて電磁石の使用による実用化
は困難となる。 Conventionally, in magnetic field molding of ferrite, it is common to apply a magnetic field using an electromagnet. However, when applying a multipolar magnetic field in the radial direction,
There are many difficulties involved in using electromagnets. The electromagnet must be large to generate the required magnetic field. Therefore, if the installation space for the electromagnet is limited and the pitch between poles is small, such as 30 mm or less, it is necessary to construct the electromagnet compactly using extremely thin wires. If a thinner wire is used, the resistance value will be higher, and therefore the amount of heat generated will increase when the required current is passed, resulting in the inconvenience that the wire coating may be destroyed. Alternatively, depending on the conditions of the power supply, even the required current may not be able to flow. Moreover, in the wet method of magnetic field forming, it is necessary to apply a magnetic field until the density of the powder changes from a coarse state to a dense state while passing water, and the duration of the magnetic field for orientation ranges from 10 seconds to 60 seconds.
Since it takes a long time (seconds), heat generation becomes a big problem. Therefore, it is difficult to put it into practical use using electromagnets.
また、生産効率を高めるために１台のプレス機
に、第２図に示すように複数の粉末充填用キヤビ
テイ１０を有する金型を設置することが好ましい
が、前述の理由で電磁石が大となるため、一つの
キヤビテイ当りの金型の大きさが大となるので、
プレス機一台に対応した金型に複数のキヤビテイ
を設けることは不可能となる。 In addition, in order to increase production efficiency, it is preferable to install a mold having a plurality of powder filling cavities 10 in one press machine as shown in Fig. 2, but the electromagnet becomes large for the reasons mentioned above. Therefore, the size of the mold per cavity becomes large,
It becomes impossible to provide multiple cavities in a mold compatible with one press machine.
本発明は、以上の問題点に鑑み、半径方向に異
方性を付与することのできる合理的な小型の湿式
磁場成型装置を提供することを目的とする。 SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a reasonably small-sized wet magnetic field forming apparatus that can impart anisotropy in the radial direction.
本発明の装置は、円筒状の半径方向に磁場を加
えながら加圧成型する磁性スラリーの磁場中成型
装置であつて、孔部を有するとともに該孔部に半
径方向の磁場を作るように該孔部周囲に４つ以上
の永久磁石をそれらのNS極が交互に並ぶように
配置しこれら永久磁石の外側磁極間を磁性リング
で短絡してなる多極の永久磁石組立体を内蔵した
外壁金型と、該孔部に配置された内壁金型と、該
内外壁金型間の空間にフエライト磁石粉末のスラ
リーを供給するために該内壁金型に具備したスラ
リー供給機構と、該内外壁金型間の空間中に出入
りする下パンチと、該空間の下パンチと反対側で
両金型に設置されたスラリー中の液体の過のた
めの過装置とを有することを特徴とする磁性ス
ラリーの磁場中成型装置である。 The apparatus of the present invention is an apparatus for molding magnetic slurry under pressure while applying a magnetic field in the radial direction of a cylindrical shape, and the apparatus has a hole and is configured to form a magnetic slurry in a radial direction so as to create a radial magnetic field in the hole. An exterior wall mold with a built-in multi-polar permanent magnet assembly formed by arranging four or more permanent magnets around the area so that their NS poles are arranged alternately, and short-circuiting the outer magnetic poles of these permanent magnets with a magnetic ring. an inner wall mold disposed in the hole, a slurry supply mechanism provided in the inner wall mold for supplying slurry of ferrite magnet powder to the space between the inner and outer wall molds, and the inner and outer wall molds. A magnetic field for magnetic slurry, characterized in that it has a lower punch that enters and exits into the space between, and a passing device for passing the liquid in the slurry, which is installed on both molds on the opposite side of the lower punch of the space. This is an intermediate molding device.
本発明によれば、小型の装置で、磁場発生の電
源を必要とすることなく、したがつて発熱の問題
もなく、半径方向の異方性を付与したフエライト
磁石粉末の湿式成型を行なうことができる。 According to the present invention, it is possible to perform wet molding of ferrite magnet powder imparted with radial anisotropy using a small device, without requiring a power source for generating a magnetic field, and therefore without the problem of heat generation. can.
以下、本発明を図面に示す実施例について詳細
に説明する。 Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.
本発明による磁場中成型装置を示す第３図およ
び第４図を参照して、１は外壁金型（ダイ）であ
り、中央部に縦孔を備えている。このダイ１の中
には、縦孔と同心状の軟磁性材で構成した磁性リ
ング２と、その内側にほぼ等角度間隔に非磁性体
４と交互に配置された高エネルギー積を有する希
土類磁石３と、更にその内側に配置された非磁性
超硬合金の円筒５とを有しており、この円筒５が
前記の縦孔を規定している。６は円筒５内に配置
された内壁金型（中芯）で超硬合金で製作され、
円筒５との間に、キヤビテイ１０を形成してい
る。中芯６の下部には、フエライト磁石粉末のス
ラリーの供給パイプ（図示せず）と接続した孔部
６ａ、更にその孔部６ａと前述のキヤビテイ１０
とを接続する横孔６ｂを有している。７は下パン
チで、キヤビテイ１０に出入りするようになつて
おり、少なくともダイ１および中芯６に接する部
分は硬度の高い非磁性合金で構成される。８は、
ダイ１および中芯６上に設置され、キヤビテイに
連通する小孔９を備えた非磁性よりなる過装置
である。 Referring to FIGS. 3 and 4 showing the magnetic field molding apparatus according to the present invention, 1 is an outer wall mold (die) having a vertical hole in the center. Inside this die 1, there is a magnetic ring 2 made of a soft magnetic material concentric with the vertical hole, and inside the magnetic ring 2, rare earth magnets having a high energy product are alternately arranged with non-magnetic materials 4 at approximately equal angular intervals. 3, and a cylinder 5 made of non-magnetic cemented carbide disposed inside the cylinder 5, and this cylinder 5 defines the vertical hole. 6 is an inner wall mold (center core) placed inside the cylinder 5, which is made of cemented carbide;
A cavity 10 is formed between the cylinder 5 and the cylinder 5. At the bottom of the core 6, there is a hole 6a connected to a supply pipe (not shown) for slurry of ferrite magnet powder, and a cavity 10 connected to the hole 6a.
It has a horizontal hole 6b connecting the two. A lower punch 7 enters and exits the cavity 10, and at least the portion in contact with the die 1 and the core 6 is made of a hard non-magnetic alloy. 8 is
This is a non-magnetic device that is installed on the die 1 and the core 6 and has a small hole 9 that communicates with the cavity.
固定されたダイ１と中芯６の上面に過装置８
をセツトし、下パンチ７を横孔６ｂより下げた状
態で、フエライト粉末のスラリーを供給管（図示
せず）から孔部６ａ、横孔６ｂを通してキヤビテ
イ空間１０へ充填する。このとき過装置８を押
圧しつつ、吸水する装置（図示せず）が働き、フ
エライト粒子をキヤビテイに残したまま、水だけ
が排水される。スラリーの供給が停止すると、下
パンチ７が上方に押圧し、水を排水しながらフエ
ライト粒子を圧縮し、所定の密度を有するプレス
成型体が得られる。 A passing device 8 is placed on the upper surface of the fixed die 1 and center core 6.
is set, and with the lower punch 7 lowered below the horizontal hole 6b, a slurry of ferrite powder is filled from a supply pipe (not shown) into the cavity space 10 through the hole 6a and the horizontal hole 6b. At this time, a water absorbing device (not shown) operates while pressing the filtration device 8, and only water is drained while leaving the ferrite particles in the cavity. When the supply of slurry is stopped, the lower punch 7 presses upward to compress the ferrite particles while draining water, thereby obtaining a press-molded body having a predetermined density.
この時、ダイ１に半径方向に磁界を発生する多
極の永久磁石があるため、この磁力線にそつて、
フエライト粒子は半径方向に多極に異方化した円
筒状プレス成型体が得られる。このとき、リング
状に配列された多数の磁石３の外側に配列された
磁性リング２により、隣接する磁石３同士が磁気
的に短絡されるため、永久磁石３によるダイ１の
内部の磁場が高く保たれ、磁性スラリーの配向度
を充分高くすることができる。 At this time, since there is a multipolar permanent magnet in the die 1 that generates a magnetic field in the radial direction, along this line of magnetic force,
A cylindrical press-molded body in which the ferrite particles are anisotropically multipolar in the radial direction is obtained. At this time, adjacent magnets 3 are magnetically short-circuited by the magnetic ring 2 arranged on the outside of the large number of magnets 3 arranged in a ring shape, so the magnetic field inside the die 1 due to the permanent magnet 3 becomes high. The degree of orientation of the magnetic slurry can be made sufficiently high.
この後、プレス成型体はダイ１よりとり出さ
れ、乾燥後、焼結される。 Thereafter, the press-molded body is taken out from the die 1, dried, and then sintered.
焼結された永久磁石体はプレス成型時の極に応
じ、即ち磁極に近接しているところは収縮が大き
く、磁極に隣接していないところはそれがやや小
さく、外周に少し凸凹が見られるため、センタレ
ス研摩機で外周を少し研摩すると良い。 The sintered permanent magnet body shrinks according to the poles during press molding, that is, the shrinkage is large in areas close to the magnetic poles, and slightly smaller in areas not adjacent to the magnetic poles, and there are slight irregularities on the outer periphery. It is best to sand the outer periphery a little with a centerless sander.
但し極数が多ければ、このような凸凹は解消さ
れる。この後、プレス成型の磁場印加と同じよう
に、半径方向に多極着磁をすることにより永久磁
石が製造される。 However, if the number of poles is large, such unevenness will be eliminated. Thereafter, a permanent magnet is manufactured by multipolar magnetization in the radial direction, similar to the application of a magnetic field during press molding.
以下具体例について述べる。 A specific example will be described below.
第３図および第４図に示す装置で、キヤビテイ
１０の外径を32mmφ内径17φとし、磁石３として
長さ70mm、幅17mm、厚さが2.5mmの寸法に構成し
た希土類磁石体（Br12kGauss，BHc9KOe，
（BH）nax28MGOeの材料を使用）を24極等間隔に
径方向に配置した。 In the apparatus shown in FIGS. 3 and 4, the outer diameter of the cavity 10 is 32 mm and the inner diameter is 17 mm, and the magnet 3 is made of a rare earth magnet (Br12kGauss, BHc9KOe) with dimensions of 70mm in length, 17mm in width, and 2.5mm in thickness. ，
(BH) nax 28MGOe material was used) with 24 poles arranged at equal intervals in the radial direction.
このような金型に、0.8μの粒子径のSrフエライ
トのスラリーを圧力を加えてキヤビテイ１０に圧
送充填し、成型した。そのプレス体を1260℃で焼
結し、成型と同じ方向に24極の着磁をして、径方
向の総磁束密度を測定したところ1400ガウスであ
つた。 A slurry of Sr ferrite having a particle size of 0.8 μm was pressure-fed into the cavity 10 and molded into the mold. The pressed body was sintered at 1260°C, magnetized with 24 poles in the same direction as the molding, and the total magnetic flux density in the radial direction was measured to be 1400 Gauss.
批較のため等方性の磁石では700〜1000ガウス
である。このことから、本発明によれば磁場配向
し、特性が向上した磁石が得られることが分る。
この時の径方向の収縮率は18％で、軸方向のそれ
は12％であつた。 For comparison, it is 700 to 1000 Gauss for an isotropic magnet. This shows that according to the present invention, it is possible to obtain a magnet that is oriented in a magnetic field and has improved characteristics.
At this time, the shrinkage rate in the radial direction was 18% and that in the axial direction was 12%.
なお、外周面を研摩し、観察したところ、軸方
向に24本のスジが見られた。これは24個の磁極に
対応したもので、フエライト粒子のＣ軸にそろつ
たところとそうでないところの光の反射量の相違
によるもので、磁場配向が磁石体により行われて
いることの結果である。 When the outer peripheral surface was polished and observed, 24 streaks were observed in the axial direction. This corresponds to the 24 magnetic poles, and is due to the difference in the amount of light reflected between the ferrite grains aligned with the C-axis and those not aligned, and is the result of the magnetic field being oriented by the magnet. be.
以上、本発明について基本的構造とその基本的
操作を説明したが、本発明によれば次ぎのような
効果がある。 The basic structure and basic operations of the present invention have been explained above, and the present invention has the following effects.
(1) ダイ内に内蔵する多極の磁場発生装置に、永
久磁石を用いているため、電磁石を用いる場合
の多極構成の困難，複雑，大型化，高価格化，
に比し、また、省エネルギーという観点から本
発明によるものが有効である。(1) Since permanent magnets are used in the multi-pole magnetic field generator built into the die, multi-pole configurations using electromagnets are difficult, complicated, larger, and more expensive.
Compared to the above, the present invention is also effective from the viewpoint of energy saving.
(2) 永久磁石を内蔵したダイに、乾式法によつて
フエライト粉末を充填することは困難で、密度
の不均一による特性のバラツキが大であつた
が、本発明は湿式法の利点を十分に活かしこれ
らの欠点は解決された。(2) It is difficult to fill a die with a built-in permanent magnet with ferrite powder using the dry method, and the characteristics vary widely due to non-uniform density. However, the present invention fully takes advantage of the advantages of the wet method. By taking advantage of these shortcomings, they were solved.
(3) 前述の説明ではプレス機に１つのキヤビテイ
空間を用いるものについて説明したが、以上の
ようなことからプレス機１台に対し、第２図の
ように複数のキヤビテイ空間を有する金型を設
置することが可能で、いわゆるパンチの上下動
する１ストロークについて複数個の円筒状磁石
体を成型することが可能であり、生産効率が極
めて良いという利点を有する。(3) In the above explanation, the press machine used one cavity space, but for the above reasons, it is possible to use a mold with multiple cavity spaces for one press machine as shown in Figure 2. It is possible to mold a plurality of cylindrical magnet bodies per so-called vertical movement stroke of the punch, and has the advantage of extremely high production efficiency.
(4) これまでの乾式あるいは湿式法の等方性フエ
ライト磁石に比べ、本発明によつて実現可能と
なつた異方性永久磁石を用いることにより、モ
ータではトルク、発電機では起電力が大幅に向
上する。(4) Compared to conventional dry or wet isotropic ferrite magnets, the use of anisotropic permanent magnets made possible by the present invention significantly increases torque in motors and electromotive force in generators. improve.
(5) 本発明によれば、孔部を有する外壁金型に、
その孔部の周囲に４つ以上の永久磁石をそれら
のNS極が交互に並ぶように放射状に配置し、
これらの外側磁極間を磁性リングで短絡してな
る永久磁石組立体を内蔵した湿式磁場成型装置
としたので、半径方向に多極（４極以上）に異
方性化された成型体を容易に得ることができ
る。(5) According to the present invention, in the outer wall mold having the hole,
Four or more permanent magnets are arranged radially around the hole so that their NS poles are arranged alternately,
The wet magnetic field molding device has a built-in permanent magnet assembly in which these outer magnetic poles are short-circuited with a magnetic ring, so it is easy to create molded objects anisotropic with multiple poles (4 or more poles) in the radial direction. Obtainable.
第１図は、本発明によつて得られる円筒状異方
性フエライト成型体の磁場配向を示す磁力線との
モデル図、第２図は１台のプレス機に設置する金
型に複数の粉末充填キヤビテイを設けた装置の平
面図、第３図は本発明の一実施例で、半断面平面
図、第４図は一部破断した正面図である。
１……外壁金型（ダイ）、２……磁性リング、
３……磁石、４……非磁性体、５……非磁性円
筒、６……内壁金型（中芯）、７……下パンチ、
８……過装置。
Fig. 1 is a model diagram showing the magnetic field orientation of a cylindrical anisotropic ferrite molded body obtained by the present invention, and Fig. 2 is a model diagram of a plurality of powders filled in a mold installed in one press machine. FIG. 3 is a plan view of an apparatus provided with a cavity, which is an embodiment of the present invention, and FIG. 4 is a half-sectional plan view, and FIG. 4 is a partially cutaway front view. 1... Outer wall mold (die), 2... Magnetic ring,
3... Magnet, 4... Non-magnetic material, 5... Non-magnetic cylinder, 6... Inner wall mold (center core), 7... Lower punch,
8... Over device.
Claims (1)
型する磁性スラリーの磁場中成型装置であつて、
孔部を有するとともに該孔部に半径方向の磁場を
作るように該孔部周囲に４つ以上の永久磁石をそ
れらのNS極が交互に並ぶように放射状に配置し
これら永久磁石の外側磁極間を磁性リングで短絡
してなる多極の永久磁石組立体を内蔵した外壁金
型と、該孔部に配置された内壁金型と、該内外壁
金型間の空間にフエライト磁石粉末のスラリーを
供給するために該内壁金型に具備したスラリー供
給機構と、該内外壁金型間の空間中に出入りする
下パンチと、該空間の下パンチと反対側で両金型
に配置されたスラリー中の液体の過のための
過装置とを有することを特徴とする磁性スラリー
の磁場中成型装置。1. A magnetic field molding device for magnetic slurry that performs pressure molding while applying a magnetic field in the radial direction of a cylinder,
It has a hole and four or more permanent magnets are arranged radially around the hole so that their NS poles are arranged alternately so as to create a radial magnetic field in the hole, and between the outer magnetic poles of these permanent magnets. A slurry of ferrite magnet powder is placed in the space between the outer wall mold, the inner wall mold placed in the hole, and the inner and outer wall molds. A slurry supply mechanism provided on the inner wall mold for supplying slurry, a lower punch that moves in and out of the space between the inner and outer wall molds, and a slurry medium disposed in both molds on the opposite side of the lower punch of the space. 1. An apparatus for forming a magnetic slurry in a magnetic field, comprising: a forming apparatus for forming a liquid;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57184368A JPS5972702A (en) | 1982-10-20 | 1982-10-20 | Molding of magnetic slurry in magnetic field and device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57184368A JPS5972702A (en) | 1982-10-20 | 1982-10-20 | Molding of magnetic slurry in magnetic field and device thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5972702A JPS5972702A (en) | 1984-04-24 |
| JPS64807B2 true JPS64807B2 (en) | 1989-01-09 |
Family
ID=16151998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57184368A Granted JPS5972702A (en) | 1982-10-20 | 1982-10-20 | Molding of magnetic slurry in magnetic field and device thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5972702A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62159411A (en) * | 1986-01-07 | 1987-07-15 | Kanegafuchi Chem Ind Co Ltd | Metal mold for molding resin magnet |
| JPS62186508A (en) * | 1986-02-12 | 1987-08-14 | Kanegafuchi Chem Ind Co Ltd | Metal mold for molding polar anisotropic resin magnet |
| JPH0173918U (en) * | 1987-11-04 | 1989-05-18 | ||
| JPH0173919U (en) * | 1987-11-04 | 1989-05-18 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS593245B2 (en) * | 1975-04-09 | 1984-01-23 | 日立金属株式会社 | Tojiki Oyobi Sonoseizohouhou |
| JPS5669805A (en) * | 1979-11-10 | 1981-06-11 | Tdk Corp | Manufacture of anisotropic plastic magnet |
-
1982
- 1982-10-20 JP JP57184368A patent/JPS5972702A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5972702A (en) | 1984-04-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0129052B1 (en) | Method of producing cylindrical permanent magnet | |
| CA1157082A (en) | Anisotropic permanent magnets and method of manufacturing same | |
| US4004167A (en) | Permanent magnet stators | |
| US4150927A (en) | Mold for the production of anisotropic permanent magnets | |
| US4547758A (en) | Cylindrical permanent magnet and method of manufacturing | |
| US3564705A (en) | Method for providing oriented pole pieces in a dynamoelectric machine | |
| JPS61112310A (en) | Manufacture of permanent magnet | |
| CN104505990A (en) | Preparation method for sintering permanent magnetic ferrite ring of brushless motor | |
| CN110943554A (en) | Tile-shaped magnet with halbach array structure effect and manufacturing method | |
| JPS64807B2 (en) | ||
| JPS5972703A (en) | Molding device of ferrite slurry in magnetic field | |
| JP3012492B2 (en) | Manufacturing method of anisotropic magnet by dry forming method | |
| CN207952627U (en) | A kind of radial direction cylindrical magnet molding die | |
| US5170084A (en) | Wide-angle arc segment magnet and brush motor containing it | |
| JPS59211502A (en) | Production of permanent magnet body having surface multipolar anisotropy | |
| JPS5972704A (en) | Manufacture of ferrite magnet having anisotropy in radial direction | |
| JPH1174143A (en) | Molding method of magnetic powder | |
| CN220420425U (en) | Multipolar ring orientation female die | |
| JPS601820A (en) | Manufacture of cylindrical permanent magnet | |
| JPS59224103A (en) | Cylindrical permanent magnet | |
| JPS5923448B2 (en) | anisotropic magnet | |
| JPS60211908A (en) | Manufacturing method of cylindrical permanent magnet | |
| RU96101372A (en) | METHOD FOR PRODUCING MULTI-POLE CYLINDRICAL PERMANENT MAGNET | |
| JPS60931B2 (en) | Anisotropic magnet manufacturing method and manufacturing device | |
| JPS622755Y2 (en) |