JPS63122106A - Plastic magnet composition - Google Patents
Plastic magnet compositionInfo
- Publication number
- JPS63122106A JPS63122106A JP61266591A JP26659186A JPS63122106A JP S63122106 A JPS63122106 A JP S63122106A JP 61266591 A JP61266591 A JP 61266591A JP 26659186 A JP26659186 A JP 26659186A JP S63122106 A JPS63122106 A JP S63122106A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- parts
- plastic magnet
- polyamide
- heat shock
- 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
- 239000004033 plastic Substances 0.000 title claims abstract description 13
- 239000000203 mixture Substances 0.000 title claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 9
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 8
- 229920006122 polyamide resin Polymers 0.000 claims abstract description 8
- 239000004952 Polyamide Substances 0.000 claims abstract description 7
- 229920001971 elastomer Polymers 0.000 claims abstract description 7
- 239000000806 elastomer Substances 0.000 claims abstract description 7
- 229920002647 polyamide Polymers 0.000 claims abstract description 7
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910000077 silane Inorganic materials 0.000 claims abstract description 5
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 4
- 229920000570 polyether Polymers 0.000 claims abstract description 4
- 239000012756 surface treatment agent Substances 0.000 claims description 3
- 230000035939 shock Effects 0.000 abstract description 8
- 239000004677 Nylon Substances 0.000 abstract description 5
- 229920001778 nylon Polymers 0.000 abstract description 5
- 239000011230 binding agent Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 229920005992 thermoplastic resin Polymers 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- 229920005989 resin Polymers 0.000 abstract description 2
- 239000011347 resin Substances 0.000 abstract description 2
- 238000004381 surface treatment Methods 0.000 abstract 1
- 239000004094 surface-active agent Substances 0.000 abstract 1
- 238000000465 moulding Methods 0.000 description 9
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000006247 magnetic powder Substances 0.000 description 3
- 230000005291 magnetic effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910000828 alnico Inorganic materials 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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
- H01F1/10—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 non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
- H01F1/11—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 non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles
- H01F1/113—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 non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles in a bonding agent
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Hard Magnetic Materials (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ロータヨークやシャフトとプラスチック磁石
を一体化するためにインサート成形を行う際、得られた
成形品のヒートショック性が優れるプラスチック磁石組
成物に関するものであり、ＯＡ機器等のモータに使用さ
れる。[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a plastic magnet composition that provides excellent heat shock resistance of the resulting molded product when insert molding is performed to integrate a rotor yoke or shaft with a plastic magnet. It relates to objects and is used in motors for OA equipment, etc.
従来よりＯＡ機器等のモータには寸法精度が良く、耐熱
性も良好な事からナイロンをバインダーとしたプラスチ
ック磁石組成物が使用される事は知られている。また、
これにより射出成形が可能となり、今まで２つの部品を
接着剤で接着する事で作製されていたモータ部゛品をシ
ャフトやロータヨークを金型にインサートするインサー
ト成形により一体成形する事で低コスト化が可能になる
事も知られている。It has been known that plastic magnet compositions containing nylon as a binder have been used in motors for office automation equipment and the like because of their good dimensional accuracy and heat resistance. Also,
This has made injection molding possible, reducing costs by molding the motor parts, which had previously been made by gluing two parts together using an adhesive, using insert molding, in which the shaft and rotor yoke are inserted into a mold. It is also known that it is possible.
しかしながら、シャフトやロータヨーク等の金属とプラ
スチック磁石を一体成形する場合、金属とプラスチック
磁石の線膨張係数が大きく異なるため、インサート成形
後の成形品を、−４０℃の所に２時間放置し、その後た
だちに＋６０℃の所に２時間放置する事を１０サイクル
行うような過酷なヒートショックにかけると、成形品に
クラックが入るという欠点があり、精密モータには使用
できなかった。However, when molding a plastic magnet with a metal such as a shaft or rotor yoke, the linear expansion coefficients of the metal and plastic magnet are significantly different, so the molded product after insert molding is left at -40℃ for 2 hours, If a severe heat shock such as 10 cycles of immediately leaving the product at +60°C for 2 hours was applied, the molded product would crack, making it unsuitable for use in precision motors.
本発明は、金属とプラスチック磁石の一体成形を行う際
、得られた成形品のヒートショック性を向上させんと研
究した結果、バインダーとしての熱可塑性樹脂としてポ
リアミドエラストマーを用いる事によりヒートショック
性が良好でしかも成形加工性にも優れるプラスチック磁
石組成物が得られるとの知見を得、更にこの知見に基づ
き種々研究を進めて本発明を完成するに至ったものであ
る。As a result of research into improving the heat shock resistance of the resulting molded product when integrally molding metal and plastic magnets, the present invention was developed by using polyamide elastomer as a thermoplastic resin as a binder to improve heat shock resistance. We have found that a plastic magnet composition that is both good and has excellent moldability can be obtained, and based on this knowledge, we have conducted various studies and completed the present invention.
本発明は、ポリアミド樹脂とポリエーテル基を有するポ
リアミドエラストマー１００重足部に対して、シラン系
の表面処理剤で前処理された強磁性粉末を２００重量部
から６５０重量部添加する事を特徴とするプラスチック
磁石組成物に関するものである。The present invention is characterized in that 200 to 650 parts by weight of ferromagnetic powder pretreated with a silane-based surface treatment agent is added to 100 parts by weight of a polyamide elastomer having a polyamide resin and a polyether group. The present invention relates to a plastic magnet composition.
本発明における強磁性粉末としては、形状が数ミクロン
程度に粉末可能なものであれば特に制限を受けず、例え
ばフェライト系磁性粉末、希土類コバルト磁性粉末、ア
ルニコ磁性粉末等が示される。The ferromagnetic powder in the present invention is not particularly limited as long as it can be powdered into a powder having a shape of several microns, and examples thereof include ferrite magnetic powder, rare earth cobalt magnetic powder, alnico magnetic powder, and the like.
また表面処理剤としては、シラン系カップリングが最適
であり、その量としては強磁性粉末に対し０．１〜１．
０重量％が望ましい。これは強磁性粉末と熱可塑性樹脂
の相容性も挙げるためで、これにより成形加工性が大巾
に改善されるのである。Furthermore, as a surface treatment agent, silane coupling is most suitable, and the amount thereof is 0.1 to 1.
0% by weight is desirable. This is because it improves the compatibility between the ferromagnetic powder and the thermoplastic resin, which greatly improves moldability.
また強磁性粉末は、ボリア゛ミド樹脂とポリエーテル基
を有するポリアミドエラストマー１００重量部に対して
２００重量部から６５０重母都合望ましい。The ferromagnetic powder is preferably 200 parts by weight to 650 parts by weight per 100 parts by weight of the polyamide elastomer having a polyamide resin and a polyether group.
これは６５０重母都合越えると成形加工性が極めて悪く
なり、２００重吊重母下の場合、組成物の強磁性粉末の
コンテントが低くなるため成形後着磁した時の磁力が低
くなりモータに使用できるものではない。またポリアミ
ド樹脂は全樹脂量の７０％以下が望ましく、これを越え
ると耐ヒートシヨツク性に顕著な効果が認められない。If the weight exceeds 650, the molding processability becomes extremely poor, and if the weight is lower than 200, the content of the ferromagnetic powder in the composition will be low, so the magnetic force when magnetized after molding will be low, and the motor will not work properly. It is not usable. Further, it is desirable that the amount of polyamide resin be 70% or less of the total resin amount; if this amount is exceeded, no significant effect on heat shock resistance will be observed.
ここに用いられるポリアミド樹脂としては６ナイロン、
１２ナイロン等があげられる。The polyamide resin used here is 6 nylon,
12 nylon and the like.
本発明に従えば従来のプラスチック磁石組成物に比ベポ
リアミドエラストマーを用いているため、金属との一体
成形後の成形品のヒートショック性が向上し、激しい温
度変化によるクラック等の発゛生がなくなるため、精密
モータ等に使用するプラスチック磁石組成物として工業
的に好適である。According to the present invention, since polyamide elastomer is used compared to conventional plastic magnet compositions, the heat shock resistance of the molded product after integral molding with metal is improved, and the occurrence of cracks etc. due to severe temperature changes is improved. Therefore, it is industrially suitable as a plastic magnet composition used in precision motors and the like.
〔実施例〕 −
第１表に示す組成物で、ロータヨークを金型にインサー
トして射出成形を行ない第１図に示す外径８０ｍの成形
品を作製し、これを−４０℃の所に２時間放置し、その
後ただちに＋６０℃の所に２時間放置する事を１０サイ
クル行ない成形品のクラック有無を確認した。また成形
品の外周に５００極の着磁を行ない、表面磁力をホール
プローブで測定し゛ た。[Example] - Using the composition shown in Table 1, a rotor yoke was inserted into a mold and injection molded to produce a molded product with an outer diameter of 80 m as shown in Figure 1. This was heated at -40°C for 2 The molded product was allowed to stand for an hour and then immediately left at +60°C for 2 hours for 10 cycles, and the presence or absence of cracks in the molded product was checked. In addition, 500 poles were magnetized around the outer periphery of the molded product, and the surface magnetic force was measured using a Hall probe.
Claims (1)
エラストマー１００重量部に対して、シラン系の表面処
理剤で前処理された強磁性粉末を２００重量部から６５
０重量部添加する事を特徴とするプラスチック磁石組成
物。200 to 65 parts by weight of ferromagnetic powder pretreated with a silane surface treatment agent is added to 100 parts by weight of a polyamide elastomer having a polyamide resin and a polyether group.
A plastic magnet composition characterized in that 0 parts by weight is added.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61266591A JPS63122106A (en) | 1986-11-11 | 1986-11-11 | Plastic magnet composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61266591A JPS63122106A (en) | 1986-11-11 | 1986-11-11 | Plastic magnet composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63122106A true JPS63122106A (en) | 1988-05-26 |
Family
ID=17432936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61266591A Pending JPS63122106A (en) | 1986-11-11 | 1986-11-11 | Plastic magnet composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63122106A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0381772A1 (en) * | 1988-08-11 | 1990-08-16 | Yuugen Kaisha Kanex | Plastic-bonded magnet |
| US6680000B2 (en) | 2001-07-25 | 2004-01-20 | Minebea Co., Ltd. | Polyamide plastic magnetic material and magnet made of same |
| JP2005072240A (en) * | 2003-08-25 | 2005-03-17 | Dainippon Ink & Chem Inc | Bond magnet composition and molded product made thereof |
| JP2007003223A (en) * | 2005-06-21 | 2007-01-11 | Nsk Ltd | Magnetic encoder and rolling bearing unit equipped with the same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS601806A (en) * | 1983-06-17 | 1985-01-08 | Daiseru Hiyurusu Kk | Composition of magnetic material |
| JPS60223859A (en) * | 1984-04-23 | 1985-11-08 | Mitsui Toatsu Chem Inc | Magnetic plastic composition |
| JPS61198702A (en) * | 1985-02-28 | 1986-09-03 | C I Kasei Co Ltd | Composition of magnet |
-
1986
- 1986-11-11 JP JP61266591A patent/JPS63122106A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS601806A (en) * | 1983-06-17 | 1985-01-08 | Daiseru Hiyurusu Kk | Composition of magnetic material |
| JPS60223859A (en) * | 1984-04-23 | 1985-11-08 | Mitsui Toatsu Chem Inc | Magnetic plastic composition |
| JPS61198702A (en) * | 1985-02-28 | 1986-09-03 | C I Kasei Co Ltd | Composition of magnet |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0381772A1 (en) * | 1988-08-11 | 1990-08-16 | Yuugen Kaisha Kanex | Plastic-bonded magnet |
| US6680000B2 (en) | 2001-07-25 | 2004-01-20 | Minebea Co., Ltd. | Polyamide plastic magnetic material and magnet made of same |
| JP2005072240A (en) * | 2003-08-25 | 2005-03-17 | Dainippon Ink & Chem Inc | Bond magnet composition and molded product made thereof |
| JP4548572B2 (en) * | 2003-08-25 | 2010-09-22 | 戸田工業株式会社 | Bonded magnet composition and molded article comprising the composition |
| JP2007003223A (en) * | 2005-06-21 | 2007-01-11 | Nsk Ltd | Magnetic encoder and rolling bearing unit equipped with the same |
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