JPH06244047A - Manufacture of resin bonded permanent magnet - Google Patents
Manufacture of resin bonded permanent magnetInfo
- Publication number
- JPH06244047A JPH06244047A JP5328830A JP32883093A JPH06244047A JP H06244047 A JPH06244047 A JP H06244047A JP 5328830 A JP5328830 A JP 5328830A JP 32883093 A JP32883093 A JP 32883093A JP H06244047 A JPH06244047 A JP H06244047A
- Authority
- JP
- Japan
- Prior art keywords
- magnet
- magnetic field
- resin
- powder
- magnet powder
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/06—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder
- H01F1/08—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together
- H01F1/083—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together in a bonding agent
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/0302—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity characterised by unspecified or heterogeneous hardness or specially adapted for magnetic hardness transitions
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Hard Magnetic Materials (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
Description
【０００１】[0001]
【発明の概要】本発明は形成磁場より高い磁場で着磁さ
れた磁石粉末と樹脂からなる混合物を使用した、樹脂結
合型磁石の製造方法に関するものである。SUMMARY OF THE INVENTION The present invention relates to a method for producing a resin-bonded magnet, which uses a mixture of a magnet powder magnetized at a magnetic field higher than the forming magnetic field and a resin.
【０００２】[0002]
【発明が解決しようとする課題】樹脂磁石は焼結磁石に
比べて （１）形成品の寸法精度が良い。 （２）強度が向上する。 （３）磁気性能が安定する （４）キズ・ワレの発生が少ない。 （５）薄肉・円筒形などの複雑形状が可能。 （６）作業性がよい。 などの利点があり、現在非常に注目されている。The resin magnet has a better dimensional accuracy of the formed product than the sintered magnet. (2) Strength is improved. (3) Stable magnetic performance (4) Less scratches and cracks. (5) Complex shapes such as thin and cylindrical shapes are possible. (6) Good workability. There are advantages such as these, and they are currently receiving much attention.
【０００３】しかし、樹脂磁石の磁気特性は焼結磁石の
それと比べて、非磁性体である樹脂を含んでいるため大
巾に低下するという欠点があった。また、一般に磁場成
形時に充分な配向を行なわせるためには、磁石の保磁力
（以下ｉＨＣと記す）の３〜５倍程度の磁場が必要とい
われている。しかし、樹脂結合型磁石は焼結磁石より大
きなｉＨｃをもっているため、配向を充分に行うには、
希土類コバルト系で３０〜５０ＫＯｅの磁場が必要にな
る。現在一般に使用されている成形機では、これだけの
磁場を得ることは困難であり、このためこれまでは充分
に配向させない状態で成形を行ってきた。However, the magnetic characteristics of the resin magnet have a drawback that they are significantly lower than those of the sintered magnet because they contain a non-magnetic resin. Further, it is generally said that a magnetic field of about 3 to 5 times the coercive force of the magnet (hereinafter referred to as iHC) is required to achieve sufficient orientation during magnetic field molding. However, since the resin-bonded magnet has a larger iHc than the sintered magnet, in order to perform sufficient orientation,
A rare earth cobalt system requires a magnetic field of 30 to 50 KOe. It is difficult to obtain such a magnetic field with a molding machine which is generally used at present, and therefore, until now, molding has been carried out in a state where it is not sufficiently oriented.
【０００４】これらの問題に対し種々の研究を重ねた結
果、磁石粉末をあらかじめ成形磁場より高い磁場で着磁
しておけば、比較的低い配向磁場でも充分に配向させる
ことが可能となった。これにより従来の射出成形機を用
いても充分な配向が得られるようになった。また磁石粉
末の量および射出成形温度を規定することによりさらに
高性能な樹脂結合型磁石の製造が可能となった。As a result of various studies on these problems, it has become possible to sufficiently orient the magnet powder even with a relatively low orientation magnetic field by magnetizing the magnet powder in advance with a magnetic field higher than the shaping magnetic field. As a result, sufficient orientation can be obtained even by using a conventional injection molding machine. Further, by defining the amount of magnet powder and the injection molding temperature, it becomes possible to manufacture a resin-bonded magnet with higher performance.
【０００５】[0005]
【課題を解決するための手段】本発明の樹脂結合型永久
磁石の製造方法は、磁石を初めに成形磁場より高い磁場
で着磁して、この磁石粉末と熱可塑性樹脂からなる混合
物を磁界をを印加しながら射出成形することを特徴とす
る。According to the method for producing a resin-bonded permanent magnet of the present invention, the magnet is first magnetized in a magnetic field higher than the molding magnetic field, and a mixture of the magnet powder and the thermoplastic resin is applied to the magnetic field. It is characterized by performing injection molding while applying
【０００６】以下、磁石粉末をあらかじめ着磁、その後
成形する成形法「粉末着磁成形法」と称す。Hereinafter, a molding method in which magnet powder is magnetized in advance and then magnetized is referred to as "powder magnetizing molding method".
【０００７】次に実施例により本発明を詳細に説明す
る。Next, the present invention will be described in detail with reference to examples.
【０００８】[0008]
実施例１ フェライト系磁石粉末にストロンチウムフェライト（以
下Ｓｒ・フェライトと略）を、希土類コバルト磁石粉末
にＳｍＳｏ5系およびＳｍ2Ｃｏ17系を用いたとき、３０
ＫＯｅで粉末着磁を行ったものと、行わなかったものと
について磁気性能を比較した結果を表１に示す。このと
き磁石粉末の量は８８Ｗｔ％、射出成形温度は２９０℃
とする。Example 1 When strontium ferrite (hereinafter abbreviated as Sr. ferrite) was used for the ferrite magnet powder and SmSo 5 system and Sm 2 Co 17 system were used for the rare earth cobalt magnet powder, 30
Table 1 shows the results of comparing the magnetic performances of the powders magnetized with KOe and those not powdered. At this time, the amount of magnet powder is 88 Wt% and the injection molding temperature is 290 ° C.
And
【０００９】またこのときの成形磁場は１４ＫＯｅであ
る。表１より粉末着磁を行った磁石の方が、粉末着磁を
行わなかった磁石より性能がよいことが判る。これは粉
末着磁により配向度が増加した結果残留磁束密度（以下
Ｂｒと略）が増加し、これによって保磁力（以下ｂＨｃ
と略）も増加、その結果最大エネルギー積（以下（Ｂ
Ｈ）ｍａｘと略）も向上したためである。またＳｒ−フ
ェライト系およびＳｒ−フェライト＋希土類コバルト系
磁石に比べて希土類コバルト系磁石は粉末着磁の効果が
大きいことが判る。これは前述の様に、ｉＨｃが大きい
ために従来の製造法では引き出せなかった性能が粉末着
磁成形法によって引き出されたと考えられ、本発明によ
り樹脂結合型磁石の欠点であった磁気性能の低さは大き
く改善されたと言える。The forming magnetic field at this time is 14 KOe. It can be seen from Table 1 that the powder magnetized magnet has better performance than the magnet not powder magnetized. This is because the residual magnetic flux density (hereinafter abbreviated as Br) increases as a result of an increase in the degree of orientation due to powder magnetization, which causes a coercive force (hereinafter bHc).
Also increases, and as a result, the maximum energy product (hereinafter (B
This is because H) (abbreviated as max) is also improved. It is also understood that the rare earth cobalt-based magnet has a greater effect of powder magnetization than the Sr-ferrite-based magnet and the Sr-ferrite + rare-earth cobalt-based magnet. As described above, it is considered that the performance that could not be obtained by the conventional manufacturing method due to the large iHc was brought out by the powder magnetizing molding method. According to the present invention, the magnetic performance was low, which was a drawback of the resin-bonded magnet. It can be said that it has been greatly improved.
【００１０】[0010]
【表１】 [Table 1]
【００１１】実施例２ 粉末着磁成形法により磁石の温度特性も向上している。
これは配向性が向上したために反磁場の影響が少なくな
り、その結果高温での磁気性能があまり低下しなくなっ
た事によるものである。Example 2 The temperature characteristic of the magnet is also improved by the powder magnetizing molding method.
This is because the influence of the demagnetizing field was reduced due to the improved orientation, and as a result, the magnetic performance at high temperature did not deteriorate so much.
【００１２】表２に１５０℃、１０００時間における不
可逆減磁率を示す。磁石粉末には、Ｓｍ（Ｃｏ0.672 Ｃ
ｕ0.08 Ｆｅ0.22 Ｚｒ0.028 ）8.2 およびＳｍ（Ｃｏ
0.614Ｃｕ0.07 Ｆｅ0.3 Ｚｒ0.016 ）7.8 の組成からな
る粉末を用いた。この表より粉末着磁成形法は、従来の
成形法に比べて磁石の不可逆減磁率を約４％向上させて
いるのが判る。Table 2 shows the irreversible demagnetization rate at 150 ° C. for 1000 hours. Sm (Co 0.672 C
u 0.08 Fe 0.22 Zr 0.028 ) 8.2 and Sm (Co
A powder having a composition of 0.614 Cu 0.07 Fe 0.3 Zr 0.016 7.8 was used. From this table, it is understood that the powder magnetizing molding method improves the irreversible demagnetization rate of the magnet by about 4% as compared with the conventional molding method.
【００１３】[0013]
【表２】 [Table 2]
【００１４】表２は磁石を１５０℃の恒温槽に１０００
時間放置した後、図１に示した装置によって全磁束を測
定し熱減磁率を求めたものである。測定用磁石サンプル
はφ１０×７ｍｍの円柱形状をしており、異法性方向は
７ｍｍ長軸方向である。試験は次の通り行った。図１中
の試料１の磁石は、３のプラスチックで出来た測定台に
セットされ、４の円筒の先端につけられたコイル２を上
へ引き上げることにより得られた信号を、５のデジタル
磁束計で読む。Table 2 shows a magnet in a constant temperature bath of 150 ° C.
After standing for a period of time, the total magnetic flux was measured by the device shown in FIG. 1 to obtain the thermal demagnetization rate. The measurement magnet sample has a cylindrical shape of φ10 × 7 mm, and the anisotropic direction is 7 mm in the major axis direction. The test was conducted as follows. The magnet of sample 1 in FIG. 1 was set on the measuring table made of plastic 3 and the signal obtained by pulling up the coil 2 attached to the tip of the cylinder 4 was measured by the digital magnetometer 5 Read.
【００１５】[0015]
【発明の効果】以上の説明の通り、本発明は樹脂結合型
磁石の成分を変える事なく、その磁気性能および温度特
性を向上させる製造方法であり、樹脂結合型磁石が注目
されている現在その工業的意義は大きいと言える。As described above, the present invention is a manufacturing method for improving the magnetic performance and temperature characteristics without changing the components of the resin-bonded magnet, and the resin-bonded magnet is currently attracting attention. It can be said that it has great industrial significance.
【図１】本発明で用いた熱減磁試験における磁束検出装
置を示す図。FIG. 1 is a diagram showing a magnetic flux detection device in a thermal demagnetization test used in the present invention.
１・・磁石 ２・・コイル ３・・測定用ケース（Ａ） ４・・測定用ケース（Ｂ） ５・・デジタル磁束計 1 ... Magnet 2 ... Coil 3 ... Measurement case (A) 4 ... Measurement case (B) 5 ... Digital magnetometer
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成６年１月２１日[Submission date] January 21, 1994
【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】請求項４[Name of item to be corrected] Claim 4
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【手続補正２】[Procedure Amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】発明の詳細な説明[Name of item to be amended] Detailed explanation of the invention
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【発明の詳細な説明】Detailed Description of the Invention
【０００１】[0001]
【産業上の利用分野】本発明は形成磁場より高い磁場で
着磁された磁石粉末と樹脂からなる混合物を使用した、
樹脂結合型磁石の製造方法に関するものである。BACKGROUND OF THE INVENTION The present invention uses a mixture of magnet powder and resin magnetized in a magnetic field higher than the forming magnetic field.
The present invention relates to a method for manufacturing a resin-bonded magnet.
【０００２】[0002]
【従来の技術】従来の樹脂結合磁石の製造方法では、磁
場配向の時にそのまま磁石粉末を着磁していたため、配
向を十分に行うにはかなり高い磁場が必要であった。 2. Description of the Related Art In the conventional method for manufacturing a resin-bonded magnet, a magnet is used.
Since the magnet powder was magnetized as it was in the field orientation,
A fairly high magnetic field was required to achieve sufficient orientation.
【０００３】[0003]
【発明が解決しようとする課題】樹脂磁石は焼結磁石に
比べて （１）形成品の寸法精度が良い。 （２）強度が向上する。 （３）磁気性能が安定する （４）キズ・ワレの発生が少ない。 （５）薄肉・円筒形などの複雑形状が可能。 （６）作業性がよい。 などの利点があり、現在非常に注目されている。The resin magnet has a better dimensional accuracy of the formed product than the sintered magnet. (2) Strength is improved. (3) Stable magnetic performance (4) Less scratches and cracks. (5) Complex shapes such as thin and cylindrical shapes are possible. (6) Good workability. There are advantages such as these, and they are currently receiving much attention.
【０００４】しかし、樹脂磁石の磁気特性は焼結磁石の
それと比べて、非磁性体である樹脂を含んでいるため大
巾に低下するという欠点があった。また、一般に磁場成
形時に充分な配向を行なわせるためには、磁石の保磁力
（以下ｉＨＣと記す）の３〜５倍程度の磁場が必要とい
われている。しかし、樹脂結合型磁石は焼結磁石より大
きなｉＨｃをもっているため、配向を充分に行うには、
希土類コバルト系で３０〜５０ＫＯｅの磁場が必要にな
る。現在一般に使用されている成形機では、これだけの
磁場を得ることは困難であり、このためこれまでは充分
に配向させない状態で成形を行ってきた。However, the magnetic characteristics of the resin magnet have a drawback that they are greatly reduced as compared with those of the sintered magnet because they contain a non-magnetic resin. Further, it is generally said that a magnetic field of about 3 to 5 times the coercive force of the magnet (hereinafter referred to as iHC) is required to achieve sufficient orientation during magnetic field molding. However, since the resin-bonded magnet has a larger iHc than the sintered magnet, in order to perform sufficient orientation,
A rare earth cobalt system requires a magnetic field of 30 to 50 KOe. It is difficult to obtain such a magnetic field with a molding machine which is generally used at present, and therefore, until now, molding has been carried out in a state where it is not sufficiently oriented.
【０００５】これらの問題に対し種々の研究を重ねた結
果、磁石粉末をあらかじめ成形磁場より高い磁場で着磁
しておけば、比較的低い配向磁場でも充分に配向させる
ことが可能となった。これにより従来の射出成形機を用
いても充分な配向が得られるようになった。また磁石粉
末の量および射出成形温度を規定することによりさらに
高性能な樹脂結合型磁石の製造が可能となった。本発明
は、比較的低い磁場でも十分に配向させ高性能な樹脂結
合型磁石を得ることを目的とする。 As a result of various studies on these problems, it has become possible to sufficiently orient the magnet powder even with a relatively low orientation magnetic field by magnetizing the magnet powder in advance with a magnetic field higher than the shaping magnetic field. As a result, sufficient orientation can be obtained even by using a conventional injection molding machine. Further, by defining the amount of magnet powder and the injection molding temperature, it becomes possible to manufacture a resin-bonded magnet with higher performance. The present invention
Is a high-performance resin binder that is sufficiently oriented even in a relatively low magnetic field.
The purpose is to obtain a compound magnet.
【０００６】[0006]
【課題を解決するための手段】本発明の樹脂結合型永久
磁石の製造方法は、磁石を初めに成形磁場より高い磁場
で着磁して、この磁石粉末と熱可塑性樹脂からなる混合
物を磁界をを印加しながら射出成形することを特徴とす
る。In the method for producing a resin-bonded permanent magnet according to the present invention, a magnet is first magnetized in a magnetic field higher than the molding magnetic field, and a mixture of the magnet powder and a thermoplastic resin is subjected to a magnetic field. It is characterized by performing injection molding while applying
【０００７】以下、磁石粉末をあらかじめ着磁、その後
成形する成形法「粉末着磁成形法」と称す。Hereinafter, a molding method of magnetizing the magnet powder in advance and molding it will be referred to as a "powder magnetizing molding method".
【０００８】次に実施例により本発明を詳細に説明す
る。Next, the present invention will be described in detail with reference to examples.
【０００９】[0009]
【実施例】 実施例１ フェライト系磁石粉末にストロンチウムフエライト（以
下Ｓｒ・フェライトと略）を、希土類コバルト磁石粉末
にＳｍＳｏ５系およびＳｍ２Ｃｏ１７系を用いたとき、
３０ＫＯｅで粉末着磁を行ったものと、行わなかったも
のとについて磁気性能を比較した結果を表１に示す。こ
のとき磁石粉末の量は８８Ｗｔ％、射出成形温度は２９
０℃とする。Example 1 When strontium ferrite (hereinafter abbreviated as Sr. ferrite) was used for the ferrite magnet powder and SmSo 5 system and Sm 2 Co 17 system were used for the rare earth cobalt magnet powder,
Table 1 shows the results of comparing the magnetic performances of the powder magnetized with 30 KOe and the powder magnetized without. At this time, the amount of magnet powder is 88 Wt% and the injection molding temperature is 29
Set to 0 ° C.
【００１０】またこのときの成形磁場は１４ＫＯｅであ
る。表１より粉末着磁を行った磁石の方が、粉末着磁を
行わなかった磁石より性能がよいことが判る。これは粉
末着磁により配向度が増加した結果残留磁束密度（以下
Ｂｒと略）が増加し、これによって保磁力（以下ｂＨｃ
と略）も増加、その結果最大エネルギー積（以下（Ｂ
Ｈ）ｍａｘと略）も向上したためである。またＳｒ−フ
ェライト系およびＳｒ−フェライト＋希土類コバルト系
磁石に比べて希土類コバルト系磁石は粉末着磁の効果が
大きいことが判る。これは前述の様に、ｉＨｃが大きい
ために従来の製造法では引き出せなかった性能が粉末着
磁成形法によって引き出されたと考えられ、本発明によ
り樹脂結合型磁石の欠点であった磁気性能の低さは大き
く改善されたと言える。The forming magnetic field at this time is 14 KOe. It can be seen from Table 1 that the powder magnetized magnet has better performance than the magnet not powder magnetized. This is because the residual magnetic flux density (hereinafter abbreviated as Br) increases as a result of an increase in the degree of orientation due to powder magnetization, which causes a coercive force (hereinafter bHc).
Also increases, and as a result, the maximum energy product (hereinafter (B
This is because H) (abbreviated as max) is also improved. It is also understood that the rare earth cobalt-based magnet has a greater effect of powder magnetization than the Sr-ferrite-based magnet and the Sr-ferrite + rare-earth cobalt-based magnet. As described above, it is considered that the performance that could not be obtained by the conventional manufacturing method due to the large iHc was brought out by the powder magnetizing molding method. According to the present invention, the magnetic performance was low, which was a drawback of the resin-bonded magnet. It can be said that it has been greatly improved.
【００１１】[0011]
【表１】 [Table 1]
【００１２】実施例２ 粉末着磁成形法により磁石の温度特性も向上している。
これは配向性が向上したために反磁場の影響が少なくな
り、その結果高温での磁気性能があまり低下しなくなっ
た事によるものである。Example 2 The temperature characteristic of the magnet is also improved by the powder magnetizing molding method.
This is because the influence of the demagnetizing field was reduced due to the improved orientation, and as a result, the magnetic performance at high temperature did not deteriorate so much.
【００１３】表２に１５０℃、１０００時間における不
可逆減磁率を示す。磁石粉末には、Ｓｍ（Ｃｏ
０．６７２Ｃｕ０．０８Ｆｅ０．２２Ｚｒ０．０２８）
８．２およびＳｍ（Ｃｏ０．６１４Ｃｕ０．０７Ｆｅ
０．３Ｚｒ０．０１６）７．８の組成からなる粉末を用
いた。この表より粉末着磁成形法は、従来の成形法に比
べて磁石の不可逆減磁率を約４％向上させているのが判
る。Table 2 shows the irreversible demagnetization ratio at 150 ° C. for 1000 hours. Sm (Co
0.672 Cu 0.08 Fe 0.22 Zr 0.028 )
8.2 and Sm (Co 0.614 Cu 0.07 Fe
A powder having a composition of 0.3 Zr 0.016 ) 7.8 was used. From this table, it is understood that the powder magnetizing molding method improves the irreversible demagnetization rate of the magnet by about 4% as compared with the conventional molding method.
【００１４】[0014]
【表２】 [Table 2]
【００１５】表２は磁石を１５０℃の恒温槽に１０００
時間放置した後、図１に示した装置によって全磁束を測
定し熱減磁率を求めたものである。測定用磁石サンプル
はφ１０×７ｍｍの円柱形状をしており、異法性方向は
７ｍｍ長軸方向である。試験は次の通り行った。図１中
の試料１の磁石は、３のプラスチックで出来た測定台に
セットされ、４の円筒の先端につけられたコイル２を上
へ引き上げることにより得られた信号を、５のデジタル
磁東計で読む。Table 2 shows a magnet in a thermostatic chamber at 150 ° C.
After standing for a period of time, the total magnetic flux was measured by the device shown in FIG. 1 to obtain the thermal demagnetization rate. The measurement magnet sample has a cylindrical shape of φ10 × 7 mm, and the anisotropic direction is 7 mm in the major axis direction. The test was conducted as follows. The magnet of sample 1 in FIG. 1 is set on the measuring table made of plastic 3 and the signal obtained by pulling up the coil 2 attached to the tip of the cylinder 4 is digital magnetometer 5 Read on.
【００１６】[0016]
【発明の効果】以上の説明の通り、本発明は樹脂結合型
磁石の成分を変える事なく、その磁気性能および温度特
性を向上させる製造方法であり、樹脂結合型磁石が注目
されている現在その工業的意義は大きいと言える。As described above, the present invention is a manufacturing method for improving the magnetic performance and temperature characteristics without changing the components of the resin-bonded magnet, and the resin-bonded magnet is currently attracting attention. It can be said that it has great industrial significance.
Claims (5)
着磁して、この磁石粉末を熱可塑性樹脂からなる混合物
を磁界を印可しながら射出成形することを特徴とする樹
脂結合型永久磁石の製造方法。1. A resin-bonded permanent magnet, characterized in that magnet powder is first magnetized in a magnetic field higher than the molding magnetic field, and this magnet powder is injection-molded with a mixture of thermoplastic resins while applying a magnetic field. Manufacturing method.
希土類コバルト系の磁石粉末の少なくとも１種以上を用
いることを特徴とする請求項１記載の樹脂結合型永久磁
石の製造方法。2. The method for producing a resin-bonded permanent magnet according to claim 1, wherein at least one of hard ferrite type and rare earth cobalt type magnet powder is used as the magnet powder.
下ｗｔ％と書く）とすることを特徴とする請求項１記載
の樹脂結合型永久磁石の製造方法。3. The method for producing a resin-bonded permanent magnet according to claim 1, wherein the amount of the magnet powder is 50 to 96% by weight (hereinafter referred to as wt%).
印可しながら射出成形することを特徴とする請求項１な
いし請求項３もいずれかに記載の樹脂結合型永久磁石の
製造方法。4. The method for producing a resin-bonded permanent magnet according to claim 1, wherein the mixture is injection-molded at 180 ° C. to 350 ° C. while applying a magnetic field.
徴とする請求項１ないし請求項４のいずれかに記載の樹
脂結合型永久磁石の製造方法。5. The method for producing a resin-bonded permanent magnet according to claim 1, wherein the magnetizing magnetic field is set to 15 Koe or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5328830A JP2516176B2 (en) | 1993-12-24 | 1993-12-24 | Method for manufacturing resin-bonded permanent magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5328830A JP2516176B2 (en) | 1993-12-24 | 1993-12-24 | Method for manufacturing resin-bonded permanent magnet |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57203259A Division JPS5994405A (en) | 1982-11-19 | 1982-11-19 | Manufacture of resin bonded type permanent magnet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06244047A true JPH06244047A (en) | 1994-09-02 |
| JP2516176B2 JP2516176B2 (en) | 1996-07-10 |
Family
ID=18214566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5328830A Expired - Lifetime JP2516176B2 (en) | 1993-12-24 | 1993-12-24 | Method for manufacturing resin-bonded permanent magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2516176B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1981044A3 (en) * | 2007-03-30 | 2008-11-05 | Toda Kogyo Corporation | Ferrite particles for bonded magnet resin composition for bonded magnet and molded products using the same |
| US7531050B2 (en) | 2002-09-19 | 2009-05-12 | Nec Tokin Corporation | Method for manufacturing bonded magnet and method for manufacturing magnetic device having bonded magnet |
| KR20190081174A (en) * | 2017-12-29 | 2019-07-09 | 현대자동차주식회사 | Complex body containing magnetic substance alloy powder, Air-conditioner compressor having the same, Method for manufacturing them |
| US11820055B2 (en) | 2013-04-03 | 2023-11-21 | Toda Kogyo Corp. | Ferrite particles for bonded magnets, resin composition for bonded magnets, and molded product using the same |
| US11823823B2 (en) | 2013-10-02 | 2023-11-21 | Toda Kogyo Corporation | Ferrite particles for bonded magnets, resin composition for bonded magnets, and molded product using the same |
-
1993
- 1993-12-24 JP JP5328830A patent/JP2516176B2/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7531050B2 (en) | 2002-09-19 | 2009-05-12 | Nec Tokin Corporation | Method for manufacturing bonded magnet and method for manufacturing magnetic device having bonded magnet |
| EP1981044A3 (en) * | 2007-03-30 | 2008-11-05 | Toda Kogyo Corporation | Ferrite particles for bonded magnet resin composition for bonded magnet and molded products using the same |
| US8741170B2 (en) | 2007-03-30 | 2014-06-03 | Toda Kogyo Corporation | Ferrite particles for bonded magnet, resin composition for bonded magnet and molded products using the same |
| US9607741B2 (en) | 2007-03-30 | 2017-03-28 | Toda Kogyo Corporation | Ferrite particles for bonded magnet, resin composition for bonded magnet and molded products using the same |
| US11820055B2 (en) | 2013-04-03 | 2023-11-21 | Toda Kogyo Corp. | Ferrite particles for bonded magnets, resin composition for bonded magnets, and molded product using the same |
| US11823823B2 (en) | 2013-10-02 | 2023-11-21 | Toda Kogyo Corporation | Ferrite particles for bonded magnets, resin composition for bonded magnets, and molded product using the same |
| KR20190081174A (en) * | 2017-12-29 | 2019-07-09 | 현대자동차주식회사 | Complex body containing magnetic substance alloy powder, Air-conditioner compressor having the same, Method for manufacturing them |
| EP3505273A3 (en) * | 2017-12-29 | 2019-07-31 | Hyundai Motor Company | Plastic composite containing magnetic alloy powder, air conditioner compressor having the same and method of producing them |
| US10975923B2 (en) | 2017-12-29 | 2021-04-13 | Hyundai Motor Company | Plastic composite containing magnetic alloy powder, air conditioner compressor having the same and method of producing them |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2516176B2 (en) | 1996-07-10 |
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