JP2002158127A - Manufacturing device of rare earth magnet, and manufacturing method thereof - Google Patents
Manufacturing device of rare earth magnet, and manufacturing method thereofInfo
- Publication number
- JP2002158127A JP2002158127A JP2000351071A JP2000351071A JP2002158127A JP 2002158127 A JP2002158127 A JP 2002158127A JP 2000351071 A JP2000351071 A JP 2000351071A JP 2000351071 A JP2000351071 A JP 2000351071A JP 2002158127 A JP2002158127 A JP 2002158127A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- mold
- magnet
- magnetic
- filling
- 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.)
- Pending
Links
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 29
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 title claims description 17
- 239000000843 powder Substances 0.000 claims abstract description 138
- 239000006247 magnetic powder Substances 0.000 claims abstract description 33
- 238000000034 method Methods 0.000 claims description 19
- 238000000465 moulding Methods 0.000 claims description 16
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 230000003179 granulation Effects 0.000 abstract 1
- 238000005469 granulation Methods 0.000 abstract 1
- 238000012856 packing Methods 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 10
- 230000005415 magnetization Effects 0.000 description 8
- 238000005336 cracking Methods 0.000 description 7
- 238000010304 firing Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- 230000032683 aging Effects 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000012937 correction Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000010902 jet-milling Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000012790 confirmation Methods 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
- H01F41/0273—Imparting anisotropy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/30—Feeding material to presses
- B30B15/302—Feeding material in particulate or plastic state to moulding presses
- B30B15/304—Feeding material in particulate or plastic state to moulding presses by using feed frames or shoes with relative movement with regard to the mould or moulds
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
Description
【発明の属する技術分野】本発明は、磁石粉末を成形す
る金型に磁石粉末を供給する磁石粉末供給装置を用いた
希土類磁石の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a rare earth magnet using a magnet powder supply device for supplying a magnet powder to a mold for molding the magnet powder.
【従来の技術】一般に希土類磁石粉末は、優れた磁気特
性により電気・電子機器や自動車等の多分野で使用され
ており、近年益々その高性能化が要求されている。その
磁石粉末は、磁石成形機の金型へ供給し、磁場中成形に
より磁化方向を一定の向きに揃えることにより高磁気特
性を得ることが出来る。また、磁場中成形しないものは
成形サイクルが短く安価に提供できる。しかしながら、
この磁性粉末は凝集しやすく、流動性が悪いため、回転
する羽根等の攪拌体により金型へ直接押し入れたり、摺
切りによる充填方法が公開特許昭和57-124599或いは公
開実用昭和55-116298号公報等の粉末供給装置が開示さ
れている。この方法でも、攪拌体が磁性粉末を金型の角
を利用して擦り切り、金型へ強く押し込んでいるため、
金型の角或いは攪拌体の近くでは磁性粉末が密に固ま
り、磁場中成形の強い磁場でも磁化方向が一定の向きに
揃わなくなり、磁気特性が低下している。また、深く充
填するために金型の面を伝って磁性粉末が落下していく
ものに対し、数回成形すると金型の面が傷つき荒れてし
まう。よって、金型の面と磁石粉末の抵抗が増し、磁石
粉末が充填しずらくなるため、金型の面を磨くのに分解
清掃する必要があり量産化に問題があった。更に、リン
グ状の金型になると、攪拌体が金型の角に当たる箇所と
金型の角に当たらず抜ける箇所が明確になるため、磁性
粉末の疎密の差が極端に生じ、成形体の割れが発生す
る。また、焼成の際にも成形体の収縮率が不均一とな
り、割れや欠けが発生し、更に周方向の磁気特性も均一
にならない問題があった。2. Description of the Related Art Rare earth magnet powders are generally used in various fields such as electric and electronic devices and automobiles due to their excellent magnetic properties, and in recent years, their performance has been increasingly required. The magnet powder is supplied to a mold of a magnet molding machine, and a high magnetic property can be obtained by aligning the magnetization direction in a fixed direction by molding in a magnetic field. Those not molded in a magnetic field have a short molding cycle and can be provided at low cost. However,
This magnetic powder is easy to agglomerate and has poor fluidity, so a method of directly pushing into a mold with a stirring body such as a rotating blade, or a method of filling by sliding cutting is disclosed in JP-A-57-124599 or JP-A-55-116298. Etc. are disclosed. Also in this method, the agitator scrapes the magnetic powder using the corners of the mold and strongly pushes it into the mold.
At the corners of the mold or near the stirrer, the magnetic powder is densely hardened, and the magnetization direction is not aligned in a fixed direction even under a strong magnetic field formed in a magnetic field, so that the magnetic properties are degraded. Also, when the magnetic powder drops along the surface of the mold for deep filling, the surface of the mold is damaged and roughened when molded several times. Therefore, the resistance between the surface of the mold and the magnet powder increases, and the filling of the magnet powder becomes difficult. Therefore, it is necessary to disassemble and clean the surface of the mold, and there is a problem in mass production. Furthermore, in the case of a ring-shaped mold, the location where the stirrer comes into contact with the corner of the mold and the place where it comes off without coming into contact with the corner of the mold become clear. Occurs. In addition, the shrinkage ratio of the molded article becomes non-uniform during firing, cracking and chipping occur, and the magnetic properties in the circumferential direction are not uniform.
【課題を解決するための手段】上記の問題を解決するた
めに、本発明は、鋭意追求，種々実験を繰り返した結
果、磁石粉末を強制的に充填する粉末供給装置と金型の
間に、一個ないし二個以上の穴で形成した板を設けるこ
とにより、磁性粉末の充填密度が均一に充填され、割れ
が少なく、配向し易く薄肉形状や細長形状で優れた希土
類磁石を得ることを見いだし、本発明を完成するに至っ
た。本発明は、強制的に磁石粉末を入れる弾力性の羽根
または、棒状より充填する方法において、擦り切る力ま
たは押し込む力を板が受けて、その力の受ける箇所に一
個ないし二個以上の磁石粉末が落下する穴を、金型形状
に沿って設けることにより、その穴から磁石粉末が金型
へ自重及び適度な押込みで充填される。更に、金型へ充
填された磁石粉末は、必要以上に押し固められることは
ないため、充填密度が均一に充填され、割れ及び変形を
少なくすることができる。金型へ落下する磁石粉末は、
図8のように粒径の大きな粉末と小さな粉末が均一に混
在した造粒粉になり、磁場中成形の磁場の強度で容易に
崩れ配向するため、配向度の向上が見られ高特性の希土
類磁石を得ることができる。図９は粒径の大きな粉末を
示す。すなわち、本願発明では、底部に穴を有する摺切
り板を有し磁石粉末を収納する粉末箱と、前記穴に前記
磁石粉末を通過させるための押込み羽根を有する希土類
磁石の製造装置とした。また、金型上に、前記金型のパ
ンチより小径の穴から磁石粉末を落下し、前記金型内に
粉末を充填し希土類磁石を製造することとした。そし
て、均一な磁気特性を持つ、長軸の円筒形の希土類磁石
を得ることが出来る。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention has been made as a result of repeated pursuits and various experiments. By providing a plate formed with one or two or more holes, the packing density of the magnetic powder is uniformly filled, less cracking, easy to orient, and it is found that a rare earth magnet excellent in thin shape and elongated shape is obtained. The present invention has been completed. The present invention relates to a method of forcing a magnetic powder into a resilient blade or a rod-like filling method, wherein a plate receives a fraying force or a pushing force, and one or two or more magnet powders are applied to a portion where the force is received. By providing a hole along which the metal powder falls along the shape of the mold, the magnet powder is filled from the hole into the mold by its own weight and moderate pressing. Further, since the magnet powder filled in the mold is not compacted more than necessary, the packing density is uniformly filled, and cracking and deformation can be reduced. The magnet powder that falls into the mold
As shown in Fig. 8, the powder becomes a granulated powder in which a large powder and a small powder are uniformly mixed, and easily collapses and orients due to the strength of the magnetic field during molding in a magnetic field. You can get a magnet. FIG. 9 shows a powder having a large particle size. That is, in the present invention, there is provided an apparatus for producing a rare-earth magnet having a powder box having a sliding plate having a hole at the bottom and containing magnet powder and a pushing blade for allowing the magnet powder to pass through the hole. Further, a magnet powder is dropped on a mold from a hole having a smaller diameter than the punch of the mold, and the mold is filled with the powder to manufacture a rare earth magnet. Then, a long axis cylindrical rare earth magnet having uniform magnetic properties can be obtained.
【発明の実施の形態】本発明における粉末箱と金型の間
に一個ないし二個以上の穴で形成した板は、金型形状に
合わせて、作成すると良い。円柱状であれば円状の穴に
し角柱であれば、四角い穴を大小多数整列させることに
より均一且つ効率的に充填させることができる。また、
充填密度を制御するため、大きい造粒粉と小さい造粒粉
の比を8〜6：2〜4になるように板の穴の大きさを、作成
すると充填密度が向上し、安定に充填されより効果的で
ある。また、強制的に磁石粉を充填する羽根或いは棒状
と上記の板の当たりを調整することでも充填密度を調整
することができる。また、リング状の金型の肉厚より、
穴径を小さくすることにより金型の肉厚より小さい造粒
粉が作成され、金型の面の影響を受けずに均一な磁性粉
末の充填を行うことができる。更に、板の厚みは特に限
定しないが0.1〜5ｍｍからなるものが好ましく、0.1ｍ
ｍ以下の厚みは強度の問題より量産性が悪くなり、5ｍ
ｍ以上の厚みになると磁石粉末が落下しずらくなるため
である。また、板状ではなく網目状の金網でも、十分充
填できる。磁石粉末の材料は、特に制約なく使用するこ
とができるが、磁気異方性を有する磁石粉末が有効であ
る。磁気異方性を有する磁石粉末としては、 R―Fe−B
系，R−Co系，R−Fe−N系等が挙げられる。一方、磁場
中成形を必要としない磁石粉末の場合でも、均一に充填
されるため割れ及び変形を少なくすることができ磁気特
性の均一化も得られる。以上、焼成用磁石粉末について
説明をしてきたが、ボンド磁石の磁石粉末にも適用でき
ることは言うまでもない。BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, a plate formed with one or more holes between a powder box and a mold is preferably prepared according to the shape of the mold. In the case of a cylindrical shape, a circular hole is formed, and in the case of a rectangular column, the holes can be uniformly and efficiently filled by arranging large and small square holes. Also,
To control the packing density, make the hole size of the plate so that the ratio of the large granulated powder to the small granulated powder is 8-6: 2-4, and the packing density will be improved and the packing will be stable More effective. The packing density can also be adjusted by adjusting the contact of the above-mentioned plate with the blade or rod shape forcibly filling the magnetic powder. Also, due to the thickness of the ring-shaped mold,
By making the hole diameter smaller, a granulated powder smaller than the thickness of the mold is created, and uniform filling of the magnetic powder can be performed without being affected by the surface of the mold. Further, the thickness of the plate is not particularly limited, but preferably comprises 0.1 to 5 mm,
If the thickness is less than 5 m, mass productivity will be worse due to the problem of strength.
This is because when the thickness is more than m, the magnet powder is hard to fall. In addition, a net-shaped metal net, not a plate-shaped net, can be sufficiently filled. The material of the magnet powder can be used without any particular limitation, but a magnet powder having magnetic anisotropy is effective. As magnetic powder having magnetic anisotropy, R-Fe-B
System, R-Co system, R-Fe-N system and the like. On the other hand, even in the case of a magnet powder that does not require compacting in a magnetic field, cracks and deformation can be reduced because the powder is uniformly filled, and uniform magnetic properties can be obtained. The firing magnet powder has been described above, but it goes without saying that the present invention can be applied to the magnet powder of the bonded magnet.
【実施例】本発明の実施例を、添付図面に基づいて詳細
に説明する。 （実施例１）磁石粉末材料Ｓｍ2Ｃｏ17系からなる原料
をＡｒガス雰囲気中でジェットミルにより平均粒径3μ
ｍの微粉末を得た。該粉末を図1に示す粉末箱1に投入し
押し込み羽根8を水平方向に往復させ、摺切り板2の穴１
０から本発明による図8，9に示すような造粒粉を得た。
摺切り板２の穴１０は図2に示すようにφ0.5ｍｍ×6個
を下パンチ4に沿って、リング状に配置した。その造粒
粉をダイプレート3，下パンチ4，コア5からなる金型φ
2.5ｍｍ×φ1.3ｍｍへ重量0.2ｇ充填するように7ｓ間金
型上に粉末箱を配置した。その充填重量を5000回繰返し
た平均と標準偏差を表1に示す。次に磁場強度12ｋＯ
ｅ、成形圧力1ｔｏｎ/ｃｍ2でφ2.5ｍｍ×φ1.3ｍｍ×
ｔ10ｍｍの形状に成形した。その後、Ａｒ中にて焼成，
時効を行い割れの発生率を確認した結果を表1に示す。
そのサンプルの磁気特性と配向率をVSM振動型磁束計を
用いて測定した。これらの特性を調べる方法として、サ
ンプルのｘ、ｙ、ｚ方向の残留磁化Mx、Mｙ、Mzを求め
た。ここで、Mxが磁化方向に対応すると、配向率は次式
で与えられる。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the accompanying drawings. (Example 1) A magnet powder material Sm 2 Co 17 based raw material was subjected to jet milling in an Ar gas atmosphere with an average particle size of 3 μm.
m was obtained. The powder is put into the powder box 1 shown in FIG. 1 and the pushing blade 8 is reciprocated in the horizontal direction.
From 0, granulated powder as shown in FIGS. 8 and 9 according to the present invention was obtained.
As shown in FIG. 2, six holes 10 of the sliding plate 2 are arranged in a ring along the lower punch 4 with a diameter of 0.5 mm.times.6. The granulated powder is converted into a die φ consisting of a die plate 3, a lower punch 4, and a core 5.
A powder box was placed on a mold for 7 seconds so that a weight of 0.2 g was filled into 2.5 mm × 1.3 mm. Table 1 shows the average and standard deviation obtained by repeating the filling weight 5,000 times. Next, the magnetic field strength is 12 kO
e, φ2.5mm × φ1.3mm × at 1ton / cm2 molding pressure
It was formed into a shape of t10 mm. After that, firing in Ar,
Table 1 shows the results of aging and confirmation of the crack occurrence rate.
The magnetic properties and orientation ratio of the sample were measured using a VSM vibrating magnetometer. As a method of examining these characteristics, residual magnetizations Mx, My, and Mz in the x, y, and z directions of the sample were obtained. Here, when Mx corresponds to the magnetization direction, the orientation ratio is given by the following equation.
【数１】 このようにして求めた結果を表1に示す。また、得られ
たサンプルを押し込み羽根部分１１と中央部１２と下パ
ンチ部１３の３等分に図7のように分割して、それぞれ
の磁気特性を測定した。その結果を表2に示す。（比較
例1）本実施例１と比較のために図3のように、実施例1
の摺切り板2を取り外した以外は同一条件にて燒結磁石
を作製した。実施例１と同様、充填重量と標準偏差，割
れの発生率，VSM振動型磁束計を用いて磁気特性の測定
を行った。その結果を表１，2に示す。 （実施例2）本実施例1と同一の磁石粉末を用いて図４に
示すように、金型の寸法を15ｍｍ×15ｍｍに変更して、
効率良く充填密度を上げるため7：3の造粒粉を作成する
ため、図5のような2ｍｍ×2ｍｍと0.9ｍｍ×0.9ｍｍの
四角穴１４を網目状に配置した摺切り板１２を用いて、
0.6ｇ充填するように7ｓ間金型上に粉末箱を配置した。
成形体は15ｍｍ×15ｍｍ×0.5ｍｍの形状に実施例1と同
一条件で成形，燒結，時効を行った。実施例1と同様、
燒結体の割れ，VSM振動型磁束計を用いて磁気特性を測
定した結果を表−１に示す。 （比較例２）本実施例2と比較のために図6のように、実
施例2の摺切り板２を取り外した以外は同一条件にて燒
結磁石を作製した。実施例１と同様、充填重量と標準偏
差，割れの発生率，VSM振動型磁束計を用いて磁気特性
の測定を行った。その結果を表１に示す。表1の結果か
ら、本実施例1，2に示すようにＢＨｍａｘ，配向度は従
来の方法である比較例1，2よりも高性能な燒結磁石であ
る。また、凝集しやすく、流動性の悪い磁石粉末材料で
も、肉厚及び厚みの薄いところでも充填重量のバラツキ
も少なく均一に充填できる。更に、表2の結果から細長
い形状でも、従来の方法では、上部（押込み羽根近郊
部）が押し固められ、ＢＨｍａｘ，配向度が26.9ＭＧＯ
ｅ，92％と低いのに対し本実施例1は、上部，中央部，
下部とほぼ同等の磁気特性が得られるため、均一に充填
され高性能な燒結磁石である。(Equation 1) Table 1 shows the results obtained in this manner. Further, the obtained sample was divided into three equal parts of the pushing blade part 11, the center part 12, and the lower punch part 13 as shown in FIG. 7, and the respective magnetic characteristics were measured. The results are shown in Table 2. (Comparative Example 1) For comparison with Example 1, as shown in FIG.
A sintered magnet was produced under the same conditions except that the sliding plate 2 was removed. In the same manner as in Example 1, the filling weight, standard deviation, crack occurrence rate, and magnetic properties were measured using a VSM vibrating magnetometer. Tables 1 and 2 show the results. Example 2 Using the same magnet powder as in Example 1, as shown in FIG. 4, the dimensions of the mold were changed to 15 mm × 15 mm.
In order to efficiently increase the packing density, a 7: 3 granulated powder is prepared by using a sliding plate 12 in which square holes 14 of 2 mm × 2 mm and 0.9 mm × 0.9 mm are arranged in a mesh as shown in FIG. ,
A powder box was placed on the mold for 7 seconds to fill 0.6 g.
The molded body was formed into a shape of 15 mm × 15 mm × 0.5 mm under the same conditions as in Example 1, and was subjected to sintering and aging. As in Example 1,
Table 1 shows the results of measuring the cracks in the sintered body and the magnetic properties using a VSM vibrating magnetometer. Comparative Example 2 For comparison with Example 2, a sintered magnet was manufactured under the same conditions as in Example 2 except that the sliding plate 2 of Example 2 was removed. In the same manner as in Example 1, the filling weight, standard deviation, crack occurrence rate, and magnetic properties were measured using a VSM vibrating magnetometer. Table 1 shows the results. From the results shown in Table 1, as shown in Examples 1 and 2, BHmax and the degree of orientation are sintered magnets having higher performance than Comparative Examples 1 and 2, which are conventional methods. In addition, even with a magnet powder material that is easily agglomerated and has poor fluidity, it can be uniformly filled with little variation in the filling weight even in a place where the thickness and thickness are small. Further, from the results shown in Table 2, even in the elongated shape, the upper portion (near the pushing blade) is compacted by the conventional method, and the BHmax and the orientation degree are 26.9 MGO.
e, which is as low as 92%.
Since it has almost the same magnetic properties as the lower part, it is a high-performance sintered magnet that is uniformly filled.
【表１】 [Table 1]
【表2】 [Table 2]
【発明の効果】本発明は、以上説明したような形態で実
施され、以下に記載されるような効果を奏する。この発
明による、希土類磁石の製造方法では、磁石粉末供給装
置の押し込む力を板が受けるため、充填した磁石粉末
に、その力の影響を及ぼさない。そのため充填した磁石
粉末は、押し固められることなく充填密度が均一に充填
できる。更に、一個ないし二個以上の穴から造粒粉の磁
石粉末が金型へ落下し、磁場中成形の磁場強度で容易に
配向する充填密度になり高性能な燒結磁石ができる。ま
た、均一に充填され割れ及び変形を少なくすることがで
きる。造粒粉を得るためには、通常大掛かりな装置を必
要とするが、本発明では、容易に造粒粉を得られるた
め、安価で高性能な希土類磁石を得ることができる。す
なわち、流動性の悪い希土類磁石粉末を均一に効率良く
充填することにより、成形安定性を実現し、且つ配向時
における磁石粉末の回転が容易になり配向度を著しく向
上し、磁気特性の高性能化を実現できるものである。The present invention is embodied in the form described above and has the following effects. In the method for manufacturing a rare-earth magnet according to the present invention, since the plate receives the pushing force of the magnet powder supply device, the force does not affect the filled magnet powder. Therefore, the filled magnetic powder can be uniformly filled without being compacted. Furthermore, the magnetic powder of the granulated powder falls into the mold from one or more holes, and the packing density becomes easily oriented by the magnetic field strength of the molding in the magnetic field, so that a high-performance sintered magnet can be obtained. In addition, it is uniformly filled, so that cracks and deformation can be reduced. In general, a large-scale apparatus is required to obtain the granulated powder. However, in the present invention, since the granulated powder can be easily obtained, a low-cost and high-performance rare earth magnet can be obtained. That is, by uniformly and efficiently filling the rare-earth magnet powder having poor fluidity, the molding stability is realized, and the rotation of the magnet powder at the time of orientation is facilitated, the degree of orientation is remarkably improved, and the magnetic properties are improved. Can be realized.
【図１】本発明の実施例1において述べた磁石粉末を充
填する粉末供給装置を示す図である。FIG. 1 is a diagram showing a powder supply device for filling a magnet powder described in Embodiment 1 of the present invention.
【図２】本発明の実施例1において述べた粉末箱と金型
の間の板を示す図である。FIG. 2 is a view showing a plate between a powder box and a mold described in the first embodiment of the present invention.
【図３】比較例1において述べた磁石粉末を充填する粉
末供給装置を示す図である。FIG. 3 is a view showing a powder supply device for filling the magnetic powder described in Comparative Example 1.
【図４】本発明の実施例1において述べた粉末箱と金型
の間の板を示す図である。FIG. 4 is a view showing a plate between a powder box and a mold described in the first embodiment of the present invention.
【図５】本発明の実施例2において述べた粉末箱と金型
の間の板を示す図である。FIG. 5 is a view showing a plate between a powder box and a mold described in the second embodiment of the present invention.
【図６】比較例2において述べた磁石粉末を充填する粉
末供給装置を示す図である。FIG. 6 is a view showing a powder supply device for filling magnetic powder described in Comparative Example 2.
【図７】本発明の実施例1において述べた磁気特性のば
らつきを調べるために燒結磁石を３等分に分割した時の
切断方向を示す斜視図である。FIG. 7 is a perspective view showing a cutting direction when a sintered magnet is divided into three equal parts in order to examine variations in magnetic characteristics described in the first embodiment of the present invention.
【図８】本発明によって作製された造粒粉の磁石粉末形
状を示す写真である。FIG. 8 is a photograph showing a shape of a magnet powder of a granulated powder produced according to the present invention.
【図９】本発明によって作製された造粒粉の磁石粉末形
状を示す拡大写真である。FIG. 9 is an enlarged photograph showing the shape of the magnet powder of the granulated powder produced according to the present invention.
１ 粉末箱 ２ 摺切り板 ３ ダイプレート ４ 下パンチ ５ コア ６ 造粒粉の磁性粉末 ７ 磁性粉末 ８ 押込み羽根 １０ 穴 １１ 羽根部分 １２ 中央部 １３ 下パンチ部 １４ 四角穴 DESCRIPTION OF SYMBOLS 1 Powder box 2 Sliding plate 3 Die plate 4 Lower punch 5 Core 6 Magnetic powder of granulated powder 7 Magnetic powder 8 Pushing blade 10 Hole 11 Blade part 12 Central part 13 Lower punch part 14 Square hole
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【手続補正書】[Procedure amendment]
【提出日】平成１２年１２月２０日（２０００．１２．
２０）[Date of submission] December 20, 2000 (200.12.
20)
【手続補正１】[Procedure amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】全文[Correction target item name] Full text
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【書類名】 明細書[Document Name] Statement
【発明の名称】 希土類磁石の製造装置及び希土類
磁石の製造方法Patent application title: Rare earth magnet manufacturing apparatus and rare earth magnet manufacturing method
【特許請求の範囲】[Claims]
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【発明の属する技術分野】本発明は、磁石粉末を成形す
る金型に磁石粉末を供給する磁石粉末供給装置を用いた
希土類磁石の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a rare earth magnet using a magnet powder supply device for supplying a magnet powder to a mold for molding the magnet powder.
【０００２】[0002]
【従来の技術】一般に希土類磁石粉末は、優れた磁気特
性により電気・電子機器や自動車等の多分野で使用され
ており、近年益々その高性能化が要求されている。その
磁石粉末は、磁石成形機の金型へ供給し、磁場中成形に
より磁化方向を一定の向きに揃えることにより高磁気特
性を得ることが出来る。また、磁場中成形しないものは
成形サイクルが短く安価に提供できる。2. Description of the Related Art Rare earth magnet powders are generally used in various fields such as electric and electronic devices and automobiles due to their excellent magnetic properties, and in recent years, their performance has been increasingly required. The magnet powder is supplied to a mold of a magnet molding machine, and a high magnetic property can be obtained by aligning the magnetization direction in a fixed direction by molding in a magnetic field. Those not molded in a magnetic field have a short molding cycle and can be provided at low cost.
【０００３】しかしながら、この磁性粉末は凝集しやす
く、流動性が悪いため、回転する羽根等の攪拌体により
金型へ直接押し入れたり、摺切りによる充填方法が公開
特許昭和57-124599或いは公開実用昭和55-116298号公報
等の粉末供給装置が開示されている。この方法でも、攪
拌体が磁性粉末を金型の角を利用して擦り切り、金型へ
強く押し込んでいるため、金型の角或いは攪拌体の近く
では磁性粉末が密に固まり、磁場中成形の強い磁場でも
磁化方向が一定の向きに揃わなくなり、磁気特性が低下
している。また、深く充填するために金型の面を伝って
磁性粉末が落下していくものに対し、数回成形すると金
型の面が傷つき荒れてしまう。よって、金型の面と磁石
粉末の抵抗が増し、磁石粉末が充填しずらくなるため、
金型の面を磨くのに分解清掃する必要があり量産化に問
題があった。[0003] However, since this magnetic powder is easily agglomerated and has poor fluidity, a method of directly pushing it into a mold by means of a stirring member such as a rotating blade, or filling it by sliding is disclosed in Japanese Patent Publication No. 57-124599 or Showa Practical Application Showa. Japanese Patent Application Laid-Open No. 55-116298 discloses a powder supply device. Also in this method, the magnetic powder is scraped off by using the corner of the mold using the corner of the mold and strongly pressed into the mold. Even in a strong magnetic field, the magnetization directions are not aligned in a fixed direction, and the magnetic properties are degraded. Also, when the magnetic powder drops along the surface of the mold for deep filling, the surface of the mold is damaged and roughened when molded several times. Therefore, the resistance between the mold surface and the magnet powder increases, and the magnet powder becomes difficult to fill.
It was necessary to disassemble and clean the surface of the mold, and there was a problem in mass production.
【０００４】更に、リング状の金型になると、攪拌体が
金型の角に当たる箇所と金型の角に当たらず抜ける箇所
が明確になるため、磁性粉末の疎密の差が極端に生じ、
成形体の割れが発生する。また、焼成の際にも成形体の
収縮率が不均一となり、割れや欠けが発生し、更に周方
向の磁気特性も均一にならない問題があった。Further, in the case of a ring-shaped mold, a portion where the agitator comes into contact with a corner of the mold and a portion where it comes off without coming into contact with the corner of the mold become clear.
Cracking of the molded body occurs. In addition, the shrinkage ratio of the molded article becomes non-uniform during firing, cracking and chipping occur, and the magnetic properties in the circumferential direction are not uniform.
【０００５】[0005]
【課題を解決するための手段】上記の問題を解決するた
めに、本発明は、鋭意追求，種々実験を繰り返した結
果、磁石粉末を強制的に充填する粉末供給装置と金型の
間に、一個ないし二個以上の穴で形成した板を設けるこ
とにより、磁性粉末の充填密度が均一に充填され、割れ
が少なく、配向し易く薄肉形状や細長形状で優れた希土
類磁石を得ることを見いだし、本発明を完成するに至っ
た。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention has been made as a result of repeated pursuits and various experiments. By providing a plate formed with one or two or more holes, the packing density of the magnetic powder is uniformly filled, less cracking, easy to orient, and it is found that a rare earth magnet excellent in thin shape and elongated shape is obtained. The present invention has been completed.
【０００６】本発明は、強制的に磁石粉末を入れる弾力
性の羽根または、棒状より充填する方法において、擦り
切る力または押し込む力を板が受けて、その力の受ける
箇所に一個ないし二個以上の磁石粉末が落下する穴を、
金型形状に沿って設けることにより、その穴から磁石粉
末が金型へ自重及び適度な押込みで充填される。更に、
金型へ充填された磁石粉末は、必要以上に押し固められ
ることはないため、充填密度が均一に充填され、割れ及
び変形を少なくすることができる。According to the present invention, there is provided a method of forcibly filling a magnetic powder with a resilient blade or a rod, wherein the plate receives a fraying force or a pushing force, and one or two or more members are provided at a location where the force is received. The hole where the magnet powder falls
By providing the metal powder along the shape of the mold, the magnet powder is filled into the mold by its own weight and moderate pressing from the hole. Furthermore,
Since the magnet powder filled in the mold is not compacted more than necessary, the filling density is uniformly filled, and cracking and deformation can be reduced.
【０００７】金型へ落下する磁石粉末は、図8のように
粒径の大きな粉末と小さな粉末が均一に混在した造粒粉
になり、磁場中成形の磁場の強度で容易に崩れ配向する
ため、配向度の向上が見られ高特性の希土類磁石を得る
ことができる。図９は図８に示す粉末の拡大図を示す。The magnet powder that falls into the mold becomes a granulated powder in which a powder having a large particle size and a powder having a small particle are uniformly mixed as shown in FIG. 8, and is easily collapsed and oriented by the strength of the magnetic field formed in a magnetic field. In addition, it is possible to obtain a rare-earth magnet having an improved degree of orientation and high characteristics. FIG. 9 shows an enlarged view of the powder shown in FIG .
【０００８】すなわち、本願発明では、底部に穴を有す
る摺切り板を有し磁石粉末を収納する粉末箱と、前記穴
に前記磁石粉末を通過させるための押込み羽根を有する
希土類磁石の製造装置とした。また、金型上に、前記金
型のパンチより小径の穴から磁石粉末を落下し、前記金
型内に粉末を充填し希土類磁石を製造することとした。
そして、均一な磁気特性を持つ、長軸の円筒形の希土類
磁石を得ることが出来る。That is, according to the present invention, there is provided a powder box for storing a magnet powder having a sliding plate having a hole at the bottom and containing a magnet powder, and an apparatus for manufacturing a rare earth magnet having a pushing blade for passing the magnet powder through the hole. did. Further, a magnet powder is dropped on a mold from a hole having a smaller diameter than the punch of the mold, and the mold is filled with the powder to manufacture a rare earth magnet.
Then, a long axis cylindrical rare earth magnet having uniform magnetic properties can be obtained.
【０００９】[0009]
【発明の実施の形態】本発明における粉末箱と金型の間
に一個ないし二個以上の穴で形成した板は、金型形状に
合わせて、作成すると良い。円柱状であれば円状の穴に
し角柱であれば、四角い穴を大小多数整列させることに
より均一且つ効率的に充填させることができる。また、
充填密度を制御するため、大きい造粒粉と小さい造粒粉
の比を8〜6：2〜4になるように板の穴の大きさを、作成
すると充填密度が向上し、安定に充填されより効果的で
ある。また、強制的に磁石粉を充填する羽根或いは棒状
と上記の板の当たりを調整することでも充填密度を調整
することができる。BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, a plate formed with one or more holes between a powder box and a mold is preferably prepared according to the shape of the mold. In the case of a cylindrical shape, a circular hole is formed, and in the case of a rectangular column, the holes can be uniformly and efficiently filled by arranging large and small square holes. Also,
To control the packing density, make the hole size of the plate so that the ratio of the large granulated powder to the small granulated powder is 8-6: 2-4, and the packing density will be improved and the packing will be stable More effective. The packing density can also be adjusted by adjusting the contact of the above-mentioned plate with the blade or rod shape forcibly filling the magnetic powder.
【００１０】また、リング状の金型の肉厚より、穴径を
小さくすることにより金型の肉厚より小さい造粒粉が作
成され、金型の面の影響を受けずに均一な磁性粉末の充
填を行うことができる。Also, by making the hole diameter smaller than the thickness of the ring-shaped mold, granulated powder smaller than the thickness of the mold is produced, and the uniform magnetic powder is not affected by the surface of the mold. Can be filled.
【００１１】更に、板の厚みは特に限定しないが0.1〜5
ｍｍからなるものが好ましく、0.1ｍｍ以下の厚みは強
度の問題より量産性が悪くなり、5ｍｍ以上の厚みにな
ると磁石粉末が落下しずらくなるためである。また、板
状ではなく網目状の金網でも、十分充填できる。Further, the thickness of the plate is not particularly limited, but is 0.1 to 5
The thickness of 0.1 mm or less is preferable because mass productivity is poor due to the problem of strength, and when the thickness is 5 mm or more, the magnet powder is difficult to drop. In addition, a net-shaped metal net, not a plate-shaped net, can be sufficiently filled.
【００１２】磁石粉末の材料は、特に制約なく使用する
ことができるが、磁気異方性を有する磁石粉末が有効で
ある。磁気異方性を有する磁石粉末としては、 R―Fe−
B系，R−Co系，R−Fe−N系等が挙げられる。一方、磁場
中成形を必要としない磁石粉末の場合でも、均一に充填
されるため割れ及び変形を少なくすることができ磁気特
性の均一化も得られる。The material of the magnet powder can be used without any particular limitation, but a magnet powder having magnetic anisotropy is effective. As magnetic powder having magnetic anisotropy, R-Fe-
B-based, R-Co-based, R-Fe-N-based and the like. On the other hand, even in the case of a magnet powder that does not require compacting in a magnetic field, cracks and deformation can be reduced because the powder is uniformly filled, and uniform magnetic properties can be obtained.
【００１３】以上、焼成用磁石粉末について説明をして
きたが、ボンド磁石の磁石粉末にも適用できることは言
うまでもない。The firing magnet powder has been described above, but it goes without saying that the present invention can also be applied to bonded magnet magnet powder.
【００１４】[0014]
【実施例】本発明の実施例を、添付図面に基づいて詳細
に説明する。 （実施例１）磁石粉末材料Ｓｍ2Ｃｏ17系からなる原料
をＡｒガス雰囲気中でジェットミルにより平均粒径3μ
ｍの微粉末を得た。該粉末を図1に示す粉末箱1に投入し
押し込み羽根8を水平方向に往復させ、摺切り板2の穴１
０から本発明による図8，9に示すような造粒粉を得た。
摺切り板２の穴１０は図2に示すようにφ0.5ｍｍ×6個
を下パンチ4に沿って、リング状に配置した。その造粒
粉をダイプレート3，下パンチ4，コア5からなる金型φ
2.5ｍｍ×φ1.3ｍｍへ重量0.2ｇ充填するように7ｓ間金
型上に粉末箱を配置した。その充填重量を5000回繰返し
た平均と標準偏差を表1に示す。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the accompanying drawings. (Example 1) A magnet powder material Sm2Co17-based raw material was jet-milled in an Ar gas atmosphere with an average particle size of 3 µm.
m was obtained. The powder is put into the powder box 1 shown in FIG. 1 and the pushing blade 8 is reciprocated in the horizontal direction.
From 0, granulated powder as shown in FIGS. 8 and 9 according to the present invention was obtained.
As shown in FIG. 2, six holes 10 of the sliding plate 2 are arranged in a ring along the lower punch 4 with a diameter of 0.5 mm.times.6. The granulated powder is converted into a die φ consisting of a die plate 3, a lower punch 4, and a core 5.
A powder box was placed on a mold for 7 seconds so that a weight of 0.2 g was filled into 2.5 mm × 1.3 mm. Table 1 shows the average and standard deviation obtained by repeating the filling weight 5,000 times.
【００１５】次に磁場強度12ｋＯｅ、成形圧力1ｔｏｎ/
ｃｍ2でφ2.5ｍｍ×φ1.3ｍｍ×ｔ10ｍｍの形状に成形
した。その後、Ａｒ中にて焼成，時効を行い割れの発生
率を確認した結果を表1に示す。そのサンプルの磁気特
性と配向率をVSM振動型磁束計を用いて測定した。これ
らの特性を調べる方法として、サンプルのｘ、ｙ、ｚ方
向の残留磁化Mx、Mｙ、Mzを求めた。ここで、Mxが磁化
方向に対応すると、配向率は次式で与えられる。Next, a magnetic field strength of 12 kOe and a molding pressure of 1 ton /
It was formed into a shape of φ2.5 mm × φ1.3 mm × t10 mm in cm 2. After that, firing and aging were performed in Ar to confirm the rate of occurrence of cracks. Table 1 shows the results. The magnetic properties and orientation ratio of the sample were measured using a VSM vibrating magnetometer. As a method of examining these characteristics, residual magnetizations Mx, My, and Mz in the x, y, and z directions of the sample were obtained. Here, when Mx corresponds to the magnetization direction, the orientation ratio is given by the following equation.
【００１６】[0016]
【数１】 (Equation 1)
【００１７】このようにして求めた結果を表1に示す。Table 1 shows the results obtained in this manner.
【００１８】また、得られたサンプルを押し込み羽根部
分１１と中央部１２と下パンチ部１３の３等分に図7の
ように分割して、それぞれの磁気特性を測定した。その
結果を表2に示す。（比較例1）本実施例１と比較のため
に図3のように、実施例1の摺切り板2を取り外した以外
は同一条件にて燒結磁石を作製した。実施例１と同様、
充填重量と標準偏差，割れの発生率，VSM振動型磁束計
を用いて磁気特性の測定を行った。その結果を表１，2
に示す。 （実施例2）本実施例1と同一の磁石粉末を用いて図４に
示すように、金型の寸法を15ｍｍ×15ｍｍに変更して、
効率良く充填密度を上げるため7：3の造粒粉を作成する
ため、図5のような2ｍｍ×2ｍｍと0.9ｍｍ×0.9ｍｍの
四角穴１４を網目状に配置した摺切り板１２を用いて、
0.6ｇ充填するように7ｓ間金型上に粉末箱を配置した。
成形体は15ｍｍ×15ｍｍ×0.5ｍｍの形状に実施例1と同
一条件で成形，燒結，時効を行った。実施例1と同様、
燒結体の割れ，VSM振動型磁束計を用いて磁気特性を測
定した結果を表−１に示す。 （比較例２）本実施例2と比較のために図6のように、実
施例2の摺切り板２を取り外した以外は同一条件にて燒
結磁石を作製した。実施例１と同様、充填重量と標準偏
差，割れの発生率，VSM振動型磁束計を用いて磁気特性
の測定を行った。その結果を表１に示す。Further, the obtained sample was divided into three equal parts of the pushing blade portion 11, the center portion 12, and the lower punch portion 13 as shown in FIG. 7, and the magnetic characteristics of each were measured. The results are shown in Table 2. (Comparative Example 1) For comparison with Example 1, as shown in FIG. 3, a sintered magnet was produced under the same conditions except that the sliding plate 2 of Example 1 was removed. As in Example 1,
Filling weight and standard deviation, crack occurrence rate, and magnetic properties were measured using a VSM vibrating magnetometer. The results are shown in Tables 1 and 2.
Shown in Example 2 Using the same magnet powder as in Example 1, as shown in FIG. 4, the dimensions of the mold were changed to 15 mm × 15 mm.
In order to efficiently increase the packing density, a 7: 3 granulated powder is prepared by using a sliding plate 12 in which square holes 14 of 2 mm × 2 mm and 0.9 mm × 0.9 mm are arranged in a mesh as shown in FIG. ,
A powder box was placed on the mold for 7 seconds to fill 0.6 g.
The molded body was formed into a shape of 15 mm × 15 mm × 0.5 mm under the same conditions as in Example 1, and was subjected to sintering and aging. As in Example 1,
Table 1 shows the results of measuring the cracks in the sintered body and the magnetic properties using a VSM vibrating magnetometer. Comparative Example 2 For comparison with Example 2, a sintered magnet was manufactured under the same conditions as in Example 2 except that the sliding plate 2 of Example 2 was removed. In the same manner as in Example 1, the filling weight, standard deviation, crack occurrence rate, and magnetic properties were measured using a VSM vibrating magnetometer. Table 1 shows the results.
【００１９】表1の結果から、本実施例1，2に示すよう
にＢＨｍａｘ，配向度は従来の方法である比較例1，2よ
りも高性能な燒結磁石である。また、凝集しやすく、流
動性の悪い磁石粉末材料でも、肉厚及び厚みの薄いとこ
ろでも充填重量のバラツキも少なく均一に充填できる。
更に、表2の結果から細長い形状でも、従来の方法で
は、上部（押込み羽根近郊部）が押し固められ、ＢＨｍ
ａｘ，配向度が26.9ＭＧＯｅ，92％と低いのに対し本実
施例1は、上部，中央部，下部とほぼ同等の磁気特性が
得られるため、均一に充填され高性能な燒結磁石であ
る。From the results shown in Table 1, as shown in Examples 1 and 2, BHmax and degree of orientation are sintered magnets having higher performance than Comparative Examples 1 and 2, which are conventional methods. In addition, even with a magnet powder material that is easily agglomerated and has poor fluidity, it can be uniformly filled with little variation in the filling weight even in a place where the thickness and thickness are small.
Furthermore, from the results in Table 2, even in the elongated shape, the upper part (near the pushing blade) is compacted by the conventional method, and the BHm
ax and the degree of orientation are as low as 26.9 MGOe and 92%, whereas Example 1 is a high-performance sintered magnet which is uniformly filled and has high performance since magnetic properties almost equal to those of the upper, central and lower portions are obtained.
【００２０】[0020]
【表１】 [Table 1]
【００２１】[0021]
【表2】 [Table 2]
【００２２】[0022]
【発明の効果】本発明は、以上説明したような形態で実
施され、以下に記載されるような効果を奏する。The present invention is embodied in the form described above and has the following effects.
【００２３】この発明による、希土類磁石の製造方法で
は、磁石粉末供給装置の押し込む力を板が受けるため、
充填した磁石粉末に、その力の影響を及ぼさない。その
ため充填した磁石粉末は、押し固められることなく充填
密度が均一に充填できる。更に、一個ないし二個以上の
穴から造粒粉の磁石粉末が金型へ落下し、磁場中成形の
磁場強度で容易に配向する充填密度になり高性能な燒結
磁石ができる。また、均一に充填され割れ及び変形を少
なくすることができる。造粒粉を得るためには、通常大
掛かりな装置を必要とするが、本発明では、容易に造粒
粉を得られるため、安価で高性能な希土類磁石を得るこ
とができる。In the method for manufacturing a rare earth magnet according to the present invention, since the plate receives the pushing force of the magnet powder supply device,
It has no effect on the filled magnet powder. Therefore, the filled magnetic powder can be uniformly filled without being compacted. Furthermore, the magnetic powder of the granulated powder falls into the mold from one or more holes, and the packing density becomes easily oriented by the magnetic field strength of the molding in the magnetic field, so that a high-performance sintered magnet can be obtained. In addition, it is uniformly filled, so that cracks and deformation can be reduced. In general, a large-scale apparatus is required to obtain the granulated powder. However, in the present invention, since the granulated powder can be easily obtained, a low-cost and high-performance rare earth magnet can be obtained.
【００２４】すなわち、流動性の悪い希土類磁石粉末を
均一に効率良く充填することにより、成形安定性を実現
し、且つ配向時における磁石粉末の回転が容易になり配
向度を著しく向上し、磁気特性の高性能化を実現できる
ものである。That is, by uniformly and efficiently filling the rare-earth magnet powder having poor fluidity, the molding stability is realized, and the rotation of the magnet powder at the time of orientation is facilitated, the degree of orientation is remarkably improved, and the magnetic properties are improved. Can achieve higher performance.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明の実施例1において述べた磁石粉末を充
填する粉末供給装置を示す図である。FIG. 1 is a diagram showing a powder supply device for filling a magnet powder described in Embodiment 1 of the present invention.
【図２】本発明の実施例1において述べた粉末箱と金型
の間の板を示す図である。FIG. 2 is a view showing a plate between a powder box and a mold described in the first embodiment of the present invention.
【図３】比較例1において述べた磁石粉末を充填する粉
末供給装置を示す図である。FIG. 3 is a view showing a powder supply device for filling the magnetic powder described in Comparative Example 1.
【図４】本発明の実施例1において述べた粉末箱と金型
の間の板を示す図である。FIG. 4 is a view showing a plate between a powder box and a mold described in the first embodiment of the present invention.
【図５】本発明の実施例2において述べた粉末箱と金型
の間の板を示す図である。FIG. 5 is a view showing a plate between a powder box and a mold described in the second embodiment of the present invention.
【図６】比較例2において述べた磁石粉末を充填する粉
末供給装置を示す図である。FIG. 6 is a view showing a powder supply device for filling magnetic powder described in Comparative Example 2.
【図７】本発明の実施例1において述べた磁気特性のば
らつきを調べるために燒結磁石を３等分に分割した時の
切断方向を示す斜視図である。FIG. 7 is a perspective view showing a cutting direction when a sintered magnet is divided into three equal parts in order to examine variations in magnetic characteristics described in the first embodiment of the present invention.
【図８】本発明によって作製された造粒粉の磁石粉末形
状を示す写真である。FIG. 8 is a photograph showing a shape of a magnet powder of a granulated powder produced according to the present invention.
【図９】本発明によって作製された造粒粉の磁石粉末形
状を示す拡大写真である。FIG. 9 is an enlarged photograph showing the shape of the magnet powder of the granulated powder produced according to the present invention.
【符号の説明】 １ 粉末箱 ２ 摺切り板 ３ ダイプレート ４ 下パンチ ５ コア ６ 造粒粉の磁性粉末 ７ 磁性粉末 ８ 押込み羽根 １０ 穴 １１ 羽根部分 １２ 中央部 １３ 下パンチ部 １４ 四角穴[Description of Signs] 1 Powder box 2 Sliding plate 3 Die plate 4 Lower punch 5 Core 6 Magnetic powder of granulated powder 7 Magnetic powder 8 Push blade 10 Hole 11 Blade portion 12 Central part 13 Lower punch part 14 Square hole
Claims (4)
末を収納する粉末箱と、 前記穴に前記磁石粉末を通過させるための押込み羽根を
有する希土類磁石の製造装置。1. An apparatus for manufacturing a rare earth magnet, comprising: a powder box having a sliding plate having a hole at the bottom and containing a magnet powder; and a pushing blade for passing the magnet powder through the hole.
穴から磁石粉末を落下し、前記金型内に粉末を充填する
希土類磁石の製造方法。2. A method of manufacturing a rare earth magnet, wherein magnet powder is dropped onto a mold from a hole having a smaller diameter than a punch of the mold, and the mold is filled with the powder.
する粉末充填装置において、磁石粉末を収納する粉末箱
と金型の間に、一個ないし二個以上の穴で形成した板を
設けて充填し、希土類磁石を得ることを特徴とする希土
類磁石の製造方法。3. A powder filling apparatus for forcibly filling a mold of a molding machine with a magnetic powder, wherein a plate formed by one or more holes is provided between the powder box containing the magnet powder and the mold. A method for manufacturing a rare earth magnet, comprising providing and filling the rare earth magnet.
て、金型形状に沿って磁石粉末の落下穴を1個ないし二
個以上配置して充填することを特徴とする希土類磁石の
製造方法。4. A method for manufacturing a rare-earth magnet according to claim 1, wherein one or more or more drop holes for magnet powder are arranged and filled along the shape of the mold. .
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000351071A JP2002158127A (en) | 2000-11-17 | 2000-11-17 | Manufacturing device of rare earth magnet, and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000351071A JP2002158127A (en) | 2000-11-17 | 2000-11-17 | Manufacturing device of rare earth magnet, and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002158127A true JP2002158127A (en) | 2002-05-31 |
Family
ID=18824188
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000351071A Pending JP2002158127A (en) | 2000-11-17 | 2000-11-17 | Manufacturing device of rare earth magnet, and manufacturing method thereof |
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| Country | Link |
|---|---|
| JP (1) | JP2002158127A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016105482A (en) * | 2013-02-04 | 2016-06-09 | インターメタリックス株式会社 | Method for manufacturing sintered magnet |
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2000
- 2000-11-17 JP JP2000351071A patent/JP2002158127A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016105482A (en) * | 2013-02-04 | 2016-06-09 | インターメタリックス株式会社 | Method for manufacturing sintered magnet |
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