JPH0452027Y2 - - Google Patents
Info
- Publication number
- JPH0452027Y2 JPH0452027Y2 JP1987160678U JP16067887U JPH0452027Y2 JP H0452027 Y2 JPH0452027 Y2 JP H0452027Y2 JP 1987160678 U JP1987160678 U JP 1987160678U JP 16067887 U JP16067887 U JP 16067887U JP H0452027 Y2 JPH0452027 Y2 JP H0452027Y2
- Authority
- JP
- Japan
- Prior art keywords
- permanent magnet
- cavity
- magnet
- magnetic
- utility
- 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
- 239000000696 magnetic material Substances 0.000 claims description 10
- 230000003014 reinforcing effect Effects 0.000 claims description 10
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 14
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 229910017110 Fe—Cr—Co Inorganic materials 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- 238000007751 thermal spraying Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000952 Be alloy Inorganic materials 0.000 description 1
- 229910000617 Mangalloy Inorganic materials 0.000 description 1
- 229910000828 alnico Inorganic materials 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 238000007750 plasma spraying Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 102200082907 rs33918131 Human genes 0.000 description 1
- 102220005308 rs33960931 Human genes 0.000 description 1
- 102220259718 rs34120878 Human genes 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Description
【考案の詳細な説明】
「産業上の利用分野」
本考案は樹脂磁石製造のための永久磁石内磁金
型用補強入駒、特に極異方配向金型用補強入駒に
関し、更に詳しくは、キヤビテイ内の磁場を低下
させることなく、射出圧等によるキヤビテイの変
形を防止した射出成形用内磁型補強入駒に関する
ものである。[Detailed description of the invention] "Field of industrial application" The present invention relates to reinforcing inserts for magnetic molds in permanent magnets for manufacturing resin magnets, particularly reinforcing inserts for polar anisotropically oriented molds. This invention relates to an internally magnetic reinforcing piece for injection molding that prevents deformation of the cavity due to injection pressure, etc., without reducing the magnetic field within the cavity.
「従来技術と問題点」
従来、この種の入駒にあつては、第１図に示す
如く、キヤビテイ１を形成する非磁性体部２の外
周より複数の凹状部３が設けられ、該凹状部３内
に永久磁石４が挿入され、接着剤により固定され
ている。しかし乍ら、かかる構造の入駒において
は、凹状部３内の奥まで隙間なく永久磁石４を挿
入したとしても、接着剤が固化する迄の間に緩み
が生じたり、また仮に隙間なく接着したとしても
接着力が弱いために凹状部内に隙間５が発生する
ことが避けられない。かくして、第２図に図示す
る如く、該凹状部３とキヤビテイ１との間に非磁
性体部２が射出圧等により変形を起こし、その結
果キヤビテイ１が変形し、成形体の寸法安定性が
著しく害され、実用に耐えないものとなる。"Prior Art and Problems" Conventionally, in this type of insert piece, as shown in FIG. A permanent magnet 4 is inserted into the portion 3 and fixed with adhesive. However, in a piece having such a structure, even if the permanent magnet 4 is inserted all the way into the recessed part 3 without any gaps, it may become loose before the adhesive hardens, or even if it is glued without any gaps. However, since the adhesive force is weak, it is inevitable that a gap 5 will be generated within the recessed portion. Thus, as shown in FIG. 2, the non-magnetic material portion 2 between the recessed portion 3 and the cavity 1 is deformed due to injection pressure, etc., and as a result, the cavity 1 is deformed, and the dimensional stability of the molded product is deteriorated. It is seriously damaged and becomes unusable.
「問題点を解決するための手段」
本考案者らはかかる実情に鑑み、上記問題点を
解決するべく鋭意研究の結果、本考案に到達した
ものである。"Means for Solving the Problems" In view of the above circumstances, the inventors of the present invention have arrived at the present invention as a result of intensive research to solve the above problems.
即ち、本考案は円筒状もしくは円柱状のキヤビ
テイの外周の非磁性体部に永久磁石が該キヤビテ
イの同心円上に放射状に配設されてなる内磁型入
駒において、前記非磁性体部と永久磁石との間に
軟磁性体からなるヨーク部を設けたことを特徴と
する補強入駒を内容とするものである。 That is, the present invention provides an internal magnet type piece in which permanent magnets are arranged radially on a concentric circle of the cavity in a non-magnetic part on the outer periphery of a cylindrical or cylindrical cavity. The content is a reinforcing piece characterized by having a yoke made of a soft magnetic material between it and a magnet.
本考案の実施態様を示す図面に基づいて説明す
ると、第３図において、本考案の補強入駒はキヤ
ビテイ１の外周の非磁性体部２に設けた複数の凹
状の磁石収容部３のキヤビテイに面した側にヨー
ク部６を介して永久磁石４が装入されている。 An explanation will be given based on the drawings showing an embodiment of the present invention. In FIG. A permanent magnet 4 is inserted into the facing side via a yoke portion 6.
上記キヤビテイ１は円柱状（図示したもの）も
しくは円筒状であり、円筒状の場合はキヤビテイ
空間内に内径を構成するターピン部が設けられ
る。 The cavity 1 has a cylindrical shape (as shown) or a cylindrical shape, and in the case of a cylindrical shape, a turpin part is provided within the cavity space to form an inner diameter.
非磁性体部２はSUS304等オーステナイト系ス
テンレス鋼、銅ベリリウム合金、YHD50（日立金
属製）等のハイマンガン鋼或いはＮ−７等の非磁
性超硬合金等の公知の材料が全て使用できる。 The non-magnetic portion 2 may be made of any known material such as austenitic stainless steel such as SUS304, copper-beryllium alloy, high manganese steel such as YHD50 (manufactured by Hitachi Metals), or non-magnetic cemented carbide such as N-7.
永久磁石４はフエライト磁石、アルニコ磁石、
Fe−Cr−Co磁石、稀土類コバルト磁石、Pt−Co
磁石、Mn−Al−Ｃ磁石、Nd−Fe−Ｂ系磁石等
公知の永久磁石が全て使用できるが、実用的には
Fe−Cr−Co磁石、稀土類コバルト磁石、Nd−
Fe−Ｂ系磁石の中から選択するのが望ましい。 The permanent magnet 4 is a ferrite magnet, an alnico magnet,
Fe-Cr-Co magnet, rare earth cobalt magnet, Pt-Co
All known permanent magnets such as magnets, Mn-Al-C magnets, and Nd-Fe-B magnets can be used, but for practical purposes
Fe−Cr−Co magnet, rare earth cobalt magnet, Nd−
It is desirable to select from among Fe-B magnets.
永久磁石４の形状は実質的に直方体であること
が好ましく、また永久磁石の形状パーミアンスが
５以上であることが好ましい。また永久磁石の保
磁力（iHc）は50000e以上で且つ表面磁束密度は
7000G以上であることが好ましく、更にはキユリ
ー温度が400℃以上であることが好ましい。 The shape of the permanent magnet 4 is preferably substantially a rectangular parallelepiped, and the shape permeance of the permanent magnet is preferably 5 or more. In addition, the coercive force (iHc) of the permanent magnet is 50000e or more, and the surface magnetic flux density is
It is preferably 7000G or higher, and more preferably the Curie temperature is 400°C or higher.
永久磁石は所望の磁極数に応じて配設され、極
異方配向の場合は、第３図に示す如く、隣り合う
永久磁石は交互に反対極をキヤビテイ中心に向け
て配置される。 The permanent magnets are arranged according to the desired number of magnetic poles, and in the case of polar anisotropic orientation, as shown in FIG. 3, adjacent permanent magnets are arranged alternately with opposite poles facing the center of the cavity.
ヨーク部６はS10C、S50C、S55C、SKD−４
等の炭素鋼と呼ばれる一般の軟磁性材料からな
り、厚さは0.1〜３mm程度が好ましい。0.1mmより
薄いと、射出圧によるキヤビテイ１の変形防止効
果が十分でなくなり、また３mmよりも厚くしても
変形防止効果がそれ以上大きくならないばかりで
なく、却つてキヤビテイ内の磁場の強さが弱めら
れる。ヨーク部６は磁石収容部３のキヤビテイに
面する側に一体的に設けるのが好ましい。一体的
に設ける方法としては溶射もしくは溶接が好適で
ある。溶射はプラズマ溶射が好ましく、また溶接
は例えばNi基ろう付用箔を用いて、圧力を加え
1040〜1100℃程度に加熱する。 Yoke part 6 is S10C, S50C, S55C, SKD-4
It is made of a general soft magnetic material called carbon steel such as carbon steel, and preferably has a thickness of about 0.1 to 3 mm. If it is thinner than 0.1mm, the effect of preventing the deformation of cavity 1 due to injection pressure will not be sufficient, and if it is thicker than 3mm, not only will the deformation prevention effect not be increased any further, but the strength of the magnetic field inside the cavity will be reduced. be weakened. It is preferable that the yoke portion 6 be integrally provided on the side of the magnet housing portion 3 facing the cavity. Thermal spraying or welding is preferable as a method for integrally providing it. Plasma spraying is preferable for thermal spraying, and for welding, for example, Ni-based brazing foil is used and pressure is applied.
Heat to about 1040-1100℃.
尚、永久磁石の作用面（キヤビテイに面した部
分）の形状がキヤビテイに沿つた円弧状であるこ
とが更に好ましく、かかる形状とすることによ
り、磁束が集中してキヤビテイ内の磁場が強くな
る。 Furthermore, it is more preferable that the shape of the working surface (the part facing the cavity) of the permanent magnet is an arc shape along the cavity, and by adopting such a shape, the magnetic flux is concentrated and the magnetic field within the cavity is strengthened.
第４図は、本考案の他の実施態様を示し、磁石
収容部３のキヤビテイに面した側にヨーク部６を
介して永久磁石４を装入し、該永久磁石の非作用
面側（作用面の反対側）にクサビ７を挿入して永
久磁石４を固定してなる。クサビ７は上記非磁性
材料が用いられる。 FIG. 4 shows another embodiment of the present invention, in which a permanent magnet 4 is inserted into the side facing the cavity of the magnet accommodating part 3 via the yoke part 6, and the non-active side (active side) of the permanent magnet A permanent magnet 4 is fixed by inserting a wedge 7 on the opposite side of the surface. The wedge 7 is made of the above non-magnetic material.
第５図は本考案の更に他の実施態様を示し、非
磁性体部２の外周にリング８を嵌挿し、磁石収容
部３のキヤビテイに面した側にヨーク部６を介し
て永久磁石４を装入し、永久磁石４の非作用面側
とリング８との間にクサビ７を挿入して永久磁石
４を固定した構造からなる。 FIG. 5 shows still another embodiment of the present invention, in which a ring 8 is fitted around the outer periphery of the non-magnetic material part 2, and a permanent magnet 4 is inserted into the side of the magnet housing part 3 facing the cavity via a yoke part 6. A wedge 7 is inserted between the non-active surface side of the permanent magnet 4 and the ring 8 to fix the permanent magnet 4.
第６図は本考案の更に別の実施態様を示し、リ
ング８は非磁性体部２の凹状の磁石収容部３内に
ヨーク部６と永久磁石４を挿入した後、外周に熱
バメにより装着されている。即ち、リング８は加
熱の際の熱膨張により内径を大きくした状態で、
非磁性体部２及び永久磁石４の外周に嵌め込まれ
た後、冷却により収縮し、密着状態で装着され
る。この場合、永久磁石４を磁石収容部３よりも
僅かに大き目とし、該磁石収容部３より僅かに突
出した状態でリング８を熱バメにより装着するこ
とは好ましい状態である。熱バメの温度は800℃
以下、より好ましくは600℃以下である。また、
本考案において、接着剤を併用しても良いことは
云うまでもない。 FIG. 6 shows still another embodiment of the present invention, in which the ring 8 is attached to the outer periphery by thermal fitting after the yoke part 6 and the permanent magnet 4 are inserted into the concave magnet housing part 3 of the non-magnetic part 2. has been done. That is, the ring 8 has an increased inner diameter due to thermal expansion during heating.
After being fitted into the outer periphery of the non-magnetic material portion 2 and the permanent magnet 4, it is contracted by cooling and is attached in a tight state. In this case, it is preferable to make the permanent magnet 4 slightly larger than the magnet accommodating part 3 and to attach the ring 8 by thermal fitting with the permanent magnet 4 slightly protruding from the magnet accommodating part 3. Thermal fit temperature is 800℃
The temperature is preferably below 600°C. Also,
In the present invention, it goes without saying that an adhesive may be used in combination.
リング８は例えば上記の軟磁性材料からなるこ
とが好ましい。軟磁性材料を用いることにより、
該リングが磁気回路を形成し、永久磁石のパーミ
アンスを高めるからである。該リングの厚さはキ
ヤビテイの大きさ等により一概に決められない
が、概ね１〜15mmの範囲が好適である。該リング
が余り薄過ぎると、クサビ７との協働して得られ
る緊締力が小さく所期の固定効果が不十分とな
り、一方、余り厚過ぎると、緊締力は大きくなる
が、熱容量が大き過ぎ、熱バメ時に永久磁石の磁
力を弱める。 It is preferable that the ring 8 is made of, for example, the above-mentioned soft magnetic material. By using soft magnetic materials,
This is because the ring forms a magnetic circuit and increases the permeance of the permanent magnet. Although the thickness of the ring cannot be determined unconditionally depending on the size of the cavity, etc., it is preferably in the range of approximately 1 to 15 mm. If the ring is too thin, the tightening force obtained in cooperation with the wedge 7 will be small and the desired fixing effect will be insufficient; on the other hand, if the ring is too thick, the tightening force will be large but the heat capacity will be too large. , weakens the magnetic force of the permanent magnet during thermal fitting.
「作用・効果」
叙上の通り、本考案によれば、キヤビテイ内の
磁場を低下させることなく、射出圧等に因る永久
磁石の位置が変動したり、キヤビテイ形状が変形
したりすることが防止され、寸法安定性の良好な
成形体を得ることができる。"Operation/Effect" As mentioned above, according to the present invention, the position of the permanent magnet can be prevented from changing due to injection pressure, etc., and the shape of the cavity cannot be deformed, without reducing the magnetic field inside the cavity. It is possible to obtain a molded article with good dimensional stability.
第１図は従来の入駒の一例を示す概要図、第２
図は同部分拡大図、第３図乃至第６図はそれぞれ
本考案の補強入駒の実施態様を示す概要図であ
る。
１……キヤビテイ、２……非磁性体部、３……
磁石収容部、４……永久磁石、５……隙間、６…
…ヨーク部、７……クサビ、８……リング。
Figure 1 is a schematic diagram showing an example of a conventional entering piece, Figure 2
The figure is an enlarged view of the same part, and FIGS. 3 to 6 are schematic diagrams showing embodiments of the reinforcing insert of the present invention. 1...Cavity, 2...Nonmagnetic material part, 3...
Magnet housing section, 4... Permanent magnet, 5... Gap, 6...
...Yoke, 7...Wedge, 8...Ring.
Claims (1)
非磁性体部に永久磁石が該キヤビテイの同心円
上に放射状に配設されてなる内磁型入駒におい
て、前記非磁性体部と永久磁石との間に軟磁性
体からなるヨーク部を設けたことを特徴とする
補強入駒。 ２ ヨーク部が非磁性体部と一体化されている実
用新案登録請求の範囲第１項記載の補強入駒。 ３ ヨーク部の厚さが0.1〜３mmの範囲である実
用新案登録請求の範囲第１項又は第２項記載の
補強入駒。 ４ 永久磁石の非作用面側に挿入したクサビによ
り永久磁石が固定された実用新案登録請求の範
囲第１項、第２項又は第３項記載の補強入駒。 ５ 永久磁石が熱バメしたリングにより固定され
た実用新案登録請求の範囲第１項、第２項又は
第３項記載の補強入駒。[Claims for Utility Model Registration] 1. In an internally magnetized piece in which permanent magnets are arranged radially on a concentric circle of a cylindrical or cylindrical cavity in a non-magnetic part on the outer periphery of the cavity, the non-magnetic A reinforcing piece characterized in that a yoke made of a soft magnetic material is provided between the body and the permanent magnet. 2. The reinforcing piece according to claim 1 of the utility model registration claim, in which the yoke portion is integrated with the non-magnetic material portion. 3. The reinforcing piece according to claim 1 or 2 of the utility model registration claim, wherein the thickness of the yoke portion is in the range of 0.1 to 3 mm. 4. The reinforcing piece according to claim 1, 2, or 3 of the utility model registration claim, in which a permanent magnet is fixed by a wedge inserted into the non-working surface of the permanent magnet. 5. The reinforcing piece according to claim 1, 2, or 3 of the utility model registration claim, in which a permanent magnet is fixed by a ring that is heat-fitted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987160678U JPH0452027Y2 (en) | 1987-10-20 | 1987-10-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987160678U JPH0452027Y2 (en) | 1987-10-20 | 1987-10-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0164418U JPH0164418U (en) | 1989-04-25 |
| JPH0452027Y2 true JPH0452027Y2 (en) | 1992-12-08 |
Family
ID=31442954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987160678U Expired JPH0452027Y2 (en) | 1987-10-20 | 1987-10-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0452027Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4604042A (en) * | 1983-06-08 | 1986-08-05 | Hitachi Metals, Inc. | Apparatus for producing anisotropic magnets |
-
1987
- 1987-10-20 JP JP1987160678U patent/JPH0452027Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4604042A (en) * | 1983-06-08 | 1986-08-05 | Hitachi Metals, Inc. | Apparatus for producing anisotropic magnets |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0164418U (en) | 1989-04-25 |
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