JPH03212914A - Manufacture of e-shaped ferrite magnetic core - Google Patents
Manufacture of e-shaped ferrite magnetic coreInfo
- Publication number
- JPH03212914A JPH03212914A JP875290A JP875290A JPH03212914A JP H03212914 A JPH03212914 A JP H03212914A JP 875290 A JP875290 A JP 875290A JP 875290 A JP875290 A JP 875290A JP H03212914 A JPH03212914 A JP H03212914A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic core
- shaped
- ferrite magnetic
- leg
- auxiliary plate
- 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
- 229910000859 α-Fe Inorganic materials 0.000 title claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 238000010304 firing Methods 0.000 claims description 10
- 238000005498 polishing Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 3
- 238000000748 compression moulding Methods 0.000 claims description 2
- 239000000843 powder Substances 0.000 abstract description 4
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000000465 moulding Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Soft 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、トランス、コイル等に広く用いられているＥ
形フェライト磁心の製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention applies to E
The present invention relates to a method of manufacturing a ferrite magnetic core.
（従来の技術）
従来のＥ型フェライト磁心を製造する方法としては、フ
ェライト原料粉末を金型にて圧縮成形するときに、第２
図に示すようにＥ形に成形し、その成形体を焼成し、そ
の後、突き合わせ面となる各脚の端面２１を研磨して製
品としていた。(Prior art) As a conventional method for manufacturing an E-type ferrite magnetic core, when ferrite raw material powder is compression-molded in a mold, a second
As shown in the figure, the molded body was molded into an E shape, the molded body was fired, and then the end face 21 of each leg, which was the abutting surface, was polished to obtain a product.
また、従来の別の製造方法としては、フェライト原料粉
末を金型にて圧縮成形するときに、第３図（ａ）に示す
ようにＥ形とＥ形を突き合わせた構造の日字形に成形し
、その成形体を焼成後、中央で切断して２個のＥ形磁心
とし、その突合せ面となる各脚の端面３１を研磨し、Ｅ
形フェライト磁心を得ていた。In addition, as another conventional manufacturing method, when ferrite raw material powder is compression molded in a mold, it is molded into a Japanese character shape with two E shapes butted against each other, as shown in Figure 3 (a). After firing, the molded body is cut at the center to form two E-shaped magnetic cores, and the end face 31 of each leg, which becomes the abutting surface, is polished to form an E-shaped core.
A type ferrite magnetic core was obtained.
（発明が解決しようとする問題点）
このフェライト磁心は、成形体を焼成するときに１８〜
２０％の収縮が起きる。しかもフェライト磁心全体を均
一に収縮させることは、極めて困難であり、通常の場合
、多少なりとも変形を生じている。(Problems to be Solved by the Invention) This ferrite magnetic core is
A contraction of 20% occurs. Moreover, it is extremely difficult to uniformly shrink the entire ferrite magnetic core, and usually some deformation occurs.
本件に係るＥ形フェライト磁心においても、変形が発生
し、問題となっている０例えば、第２図に示したような
Ｅ形成形体を焼成するとき、背面２３を焼成ケースに当
接させて、各脚が立った状態で焼成が行われ、焼成後、
第４図に示すように外側脚２２が外側に開くといった変
形が発生していた、また、第３図に示した日字形成形体
を焼成するとき、一方の背面３２を焼成ケースに当接さ
せて、成形体を立てて焼成が行われ、焼成後、第５図に
示すように上側となっていた磁心の背面３４の中央がく
ぼみ、外側脚３３も開くといった変形が生じていた。Deformation also occurs in the E-shaped ferrite magnetic core according to the present case, which is a problem.For example, when firing an E-shaped body as shown in FIG. Firing is performed with each leg standing, and after firing,
As shown in FIG. 4, deformation such as the outer leg 22 opening outward had occurred.Also, when firing the Japanese character forming body shown in FIG. Then, the molded body was stood up and fired, and after firing, as shown in FIG. 5, the center of the back surface 34 of the upper magnetic core was depressed and the outer legs 33 were also opened.
Ｅ形フェライト磁心は、２個のＥ形フェライト磁心を突
き合わせて使用するため、上記のような変形が生じると
、突き合わせた脚の合わせ面が合致せず、所望の特性を
得られないといった問題点があった。Since E-type ferrite magnetic cores are used by abutting two E-type ferrite magnetic cores, if the above-mentioned deformation occurs, the mating surfaces of the butted legs will not match, and the desired characteristics will not be obtained. was there.
本発明は、上記の事を鑑みて、変形を極力少なくしたＥ
形フェライト磁心の製造方法を提供することを目的とす
る。In view of the above, the present invention has been developed to reduce deformation as much as possible.
The object of the present invention is to provide a method for manufacturing a shaped ferrite magnetic core.
（問題点を解決するための手段）
本発明は、金型による圧縮成形時に、Ｅ形となる各脚部
の先端に、該脚部を連結する補助板を一体に形成した日
字形成形体を得、焼成後、前記補助板部分を研磨により
削除してＥ形フェライト磁心を得るものである。(Means for Solving the Problems) The present invention provides a Japanese character forming body in which an auxiliary plate connecting the legs is integrally formed at the tip of each leg that becomes E-shaped during compression molding with a mold. After obtaining and firing, the auxiliary plate portion is removed by polishing to obtain an E-type ferrite magnetic core.
（実施例） 本発明を実施例に基いて説明する。(Example) The present invention will be explained based on examples.
フェライト原料粉末を金型で成形するとき、第１図（ａ
）に示すように、Ｅ形の中心脚１及び外側脚２の先端に
、その中心脚１及び外側脚２を連結する補助板４が一体
に形成された日字形成形体を成形し、この成形体の背面
３を焼成ケース上に配置して、成形体を立たせた状態で
焼成し、その後補助板４部分を研磨により削除し、第１
図（ｂ）に示すようなＥ形フェライト磁心を得た。When molding the ferrite raw material powder with a mold, Fig. 1 (a)
), a Japanese letter-forming body is formed in which an auxiliary plate 4 connecting the center leg 1 and outer leg 2 is integrally formed at the tips of the E-shaped center leg 1 and outer leg 2, and this molding The back side 3 of the body is placed on a firing case, the molded body is fired in an upright state, and then the auxiliary plate 4 portion is removed by polishing.
An E-type ferrite magnetic core as shown in Figure (b) was obtained.
この実施例のＥ形フェライト磁心の寸法は、第１図（ｂ
）において、ａ ＝２５．４＋ａ、 ｂ ＝９．５ｍ。The dimensions of the E-type ferrite magnetic core in this example are shown in Figure 1 (b
), a = 25.4 + a, b = 9.5 m.
ｃ ＝ ３ ｙｍ、 ｄ ＝６．４ｍｍ、 ｅ ＝３．
２ｍであり、成形時の補助板４の厚さ又は１ｍとした。c = 3 ym, d = 6.4 mm, e = 3.
The thickness was 2 m, and the thickness of the auxiliary plate 4 during molding was 1 m.
この実施例によれば、製品の８寸法とｆ寸法の差の平均
が０．０１ｍであった。尚、第２図の従来例では、その
値は０．３ｍで、第３図の従来例では、その値は０．１
閣であった。尚、このときの対象の製品数は２００個で
あった。According to this example, the average difference between the 8 dimensions of the product and the f dimension was 0.01 m. In the conventional example shown in Fig. 2, the value is 0.3 m, and in the conventional example shown in Fig. 3, the value is 0.1 m.
It was a cabinet. The number of target products at this time was 200.
また、実施例によるＥ形磁心としてのμｅ（実効透磁率
）は８，６００で、かつバラツキは５％であった。これ
に対し第３図の従来例では８０００で、バラツキは１５
％であった。Furthermore, the μe (effective magnetic permeability) of the E-type magnetic core according to the example was 8,600, and the variation was 5%. On the other hand, in the conventional example shown in Fig. 3, the number is 8000, and the variation is 15.
%Met.
本発明では、−個のＥ形磁心の寸法で補助板を付けて日
字形に成形し、焼成することにより、変形を極力押える
ことができた。これは従来の二個のＥ形磁心を突き合わ
せた日字形で成形し、焼成するものに比べ、寸法が小さ
く、変形もより小さいものである。In the present invention, deformation can be suppressed as much as possible by attaching an auxiliary plate to the size of an E-shaped magnetic core, forming it into a Japanese character shape, and firing it. This is smaller in size and less deformable than the conventional one in which two E-shaped magnetic cores are butted against each other to form a Japanese letter shape and then fired.
また、本発明の補助板部分は、−見ムダのようにも見え
るが、従来でも変形によりかなり研磨する必要があり、
本発明の補助板は従来の研磨量と大差なく、従来と比較
し、製品の安定生産も考えると、コスト高にならなく、
むしろコスト低減も可能である。In addition, although the auxiliary plate portion of the present invention may seem like a waste of time, conventionally the auxiliary plate portion required considerable polishing due to deformation.
The amount of polishing of the auxiliary plate of the present invention is not much different from the conventional one, and compared to the conventional one, considering stable production of the product, the cost does not increase.
In fact, cost reduction is also possible.
（発明の効果）
本発明によれば、変形の極めて少ないＥ形フェライト磁
心を得ることができ、このＥ形フェライト磁心の生産性
を向上させることができるとともに、このＥ形フェライ
ト磁心を用いるトランスまたはコイルの特性の均一化を
達成できるものである。(Effects of the Invention) According to the present invention, an E-type ferrite magnetic core with extremely little deformation can be obtained, productivity of this E-type ferrite magnetic core can be improved, and a transformer or This makes it possible to achieve uniform characteristics of the coil.
第１図は、本発明に係る一実施例の説明図であり、第２
図〜第５図は、従来技術の説明図である。
１・・・中心脚、２・・・外側脚、３・・・背面、４・
・・補助板。
忙１図
第２図
第３図
第４図
第５図FIG. 1 is an explanatory diagram of one embodiment according to the present invention, and FIG.
FIGS. 5 to 5 are explanatory diagrams of the prior art. 1... Central leg, 2... Outer leg, 3... Back, 4...
...Auxiliary board. Busy Figure 1 Figure 2 Figure 3 Figure 4 Figure 5
Claims (1)
圧縮成形時に、Ｅ形となる各脚部の先端に、該各脚部を
連結する補助板を一体に形成し、日字型の成形体を得、
焼成後前記補助板部分を研磨により削除してＥ形フェラ
イト磁心を得ることを特徴とするＥ形フェライト磁心の
製造方法。In the method for manufacturing an E-shaped ferrite magnetic core, during compression molding using a mold, an auxiliary plate is integrally formed at the tip of each E-shaped leg to connect the legs to obtain a Japanese letter shaped molded body. ,
A method for manufacturing an E-type ferrite magnetic core, which comprises removing the auxiliary plate portion by polishing after firing to obtain an E-type ferrite magnetic core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP875290A JPH03212914A (en) | 1990-01-18 | 1990-01-18 | Manufacture of e-shaped ferrite magnetic core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP875290A JPH03212914A (en) | 1990-01-18 | 1990-01-18 | Manufacture of e-shaped ferrite magnetic core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03212914A true JPH03212914A (en) | 1991-09-18 |
Family
ID=11701660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP875290A Pending JPH03212914A (en) | 1990-01-18 | 1990-01-18 | Manufacture of e-shaped ferrite magnetic core |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03212914A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103707400A (en) * | 2013-12-17 | 2014-04-09 | 江苏省晶石磁性材料与器件工程技术研究有限公司 | Mold for preventing EC-shaped manganese zinc ferrite from extending and deforming |
| JP2016009764A (en) * | 2014-06-24 | 2016-01-18 | 株式会社タムラ製作所 | Reactor component and reactor |
| CN105428051A (en) * | 2015-12-08 | 2016-03-23 | 山东恒瑞磁电科技有限公司 | Preparation method for E-type magnetic core |
-
1990
- 1990-01-18 JP JP875290A patent/JPH03212914A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103707400A (en) * | 2013-12-17 | 2014-04-09 | 江苏省晶石磁性材料与器件工程技术研究有限公司 | Mold for preventing EC-shaped manganese zinc ferrite from extending and deforming |
| JP2016009764A (en) * | 2014-06-24 | 2016-01-18 | 株式会社タムラ製作所 | Reactor component and reactor |
| CN105428051A (en) * | 2015-12-08 | 2016-03-23 | 山东恒瑞磁电科技有限公司 | Preparation method for E-type magnetic core |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH03212914A (en) | Manufacture of e-shaped ferrite magnetic core | |
| CN207841945U (en) | Injection mold | |
| JP2002203731A (en) | Coil component and its manufacturing method | |
| JP2000254907A (en) | Dry molding die for arclike ferrite magnet | |
| JPH0323604A (en) | Drum-shaped magnetic core | |
| JPS59101255A (en) | Manufacture of annular body having projected part | |
| JP2545687B2 (en) | Molding die and powder molding method | |
| JPS579245A (en) | Manufacture of curved type field coil | |
| US5238628A (en) | Method of producing a deflection yoke core | |
| JP2586818Y2 (en) | Transformer core | |
| JPS6355854B2 (en) | ||
| JPH0435009A (en) | Rectangular-shaped ferrite core | |
| JP2003249413A (en) | Method for manufacturing ceramic core | |
| JPS6247835B2 (en) | ||
| JPS55109533A (en) | Production of iron core | |
| JPH06260358A (en) | Manufacture of ferrite core | |
| JPS6120729Y2 (en) | ||
| JPH05156305A (en) | Device for compacting sintered part | |
| JPH0788697A (en) | Powder molding method | |
| JPH04181709A (en) | Press molding of ferrite component | |
| JPH02297842A (en) | Deflection yoke core | |
| JPS59175711A (en) | Manufacture of e-shape ferrite magnetic core | |
| JPS63202012A (en) | Manufacture of e-type core with gap | |
| JPS5955008A (en) | Manufacture of ferrite core | |
| JPS5836641B2 (en) | Method for manufacturing powder sintered articles |