JPS6216443B2 - - Google Patents
Info
- Publication number
- JPS6216443B2 JPS6216443B2 JP12858979A JP12858979A JPS6216443B2 JP S6216443 B2 JPS6216443 B2 JP S6216443B2 JP 12858979 A JP12858979 A JP 12858979A JP 12858979 A JP12858979 A JP 12858979A JP S6216443 B2 JPS6216443 B2 JP S6216443B2
- Authority
- JP
- Japan
- Prior art keywords
- core
- permalloy
- magnetic head
- plates
- plate made
- 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
- 239000000463 material Substances 0.000 claims description 33
- 229910000889 permalloy Inorganic materials 0.000 claims description 20
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000005304 joining Methods 0.000 claims description 2
- 238000001259 photo etching Methods 0.000 claims description 2
- 238000010030 laminating Methods 0.000 claims 1
- 238000003825 pressing Methods 0.000 claims 1
- 239000011162 core material Substances 0.000 description 24
- 238000000034 method Methods 0.000 description 5
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 230000004907 flux Effects 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Description
本発明は、JIS規格のPB材（Ni40〜50％）及び
PC材（Ni70〜80％）から成る２種類のパーマロ
イ板を結合した磁気ヘツドのコア及びその製造方
法を提供するにある。
従来、磁気ヘツドのコア材料としては、透磁率
が大きく、また、加工が非常に容易であることか
ら、前記PC材から成るパーマロイ板（78パーマ
ロイ）が頻繁に使われている。しかし、このPC
材は硬さが低いのでコアが摩耗し易く、また、磁
束密度が比較的低いので、磁気飽和しやすく、ダ
イナミツクレンヂが狭いという欠点がある。
本発明は上記欠点に鑑み、PC材にPB材を結合
し、両材料の長所を兼ね備えたコア及びその製造
方法を提供するものである。
すなわち、本発明の磁気ヘツドのコアは、その
テープ摺接側をPB材、後方側をPC材として構成
したものである。ここで、パーマロイのPB材と
PC材のそれぞれの特徴は下記〔表１〕に示す通
りである。
The present invention uses JIS standard PB material (Ni40-50%) and
The present invention provides a magnetic head core in which two types of permalloy plates made of PC material (Ni70-80%) are bonded together, and a method for manufacturing the same. Conventionally, a permalloy plate (78 permalloy) made of the above-mentioned PC material has been frequently used as a core material for magnetic heads because it has high magnetic permeability and is very easy to process. However, this PC
Since the material has low hardness, the core is easily worn out, and since the magnetic flux density is relatively low, it is easily magnetically saturated and has a narrow dynamic range. In view of the above drawbacks, the present invention provides a core that combines the advantages of both materials by bonding a PB material to a PC material, and a method for manufacturing the same. That is, the core of the magnetic head of the present invention is constructed of a PB material on the tape sliding contact side and a PC material on the rear side. Here, permalloy PB material and
The characteristics of each PC material are shown in Table 1 below.
【表】
なお、〔表１〕中のB10は10Qeにおける磁束密
度を比較したものである。また、この〔表１〕か
ら明らかなように、PB材はPC材と比較してB10
（磁束密度）が高く、硬度も高いという長所を有
している。一方、モールドによる劣化は大きいと
いう欠点がある。
そこで、上記コアの製造方法を図面により説明
すると、第１図に示すように、先ず、それぞれ厚
さが１mm程度のPB材から成るパーマロイ板１と
PC材からなるパーマロイ板２とを用意し、この
両者を溶接等により予め接合しておく。なお、３
はその接合部である。次に、接合された両パーマ
ロイ板１，２を圧延（冷間圧延等）により厚さ
0.1〜0.3mm程度に引き延ばし、第２図に示すよう
にプレス加工またはフオトエツチング等の方法に
より所望パターンのコア片４を形成する。
なお、この際、該コア片４のテープ摺接側を
PB材、その後方側をPC材とし、PB材の占有面積
はコア片４全体の約1/5〜2/5とする。続いて、該
コア片４に熱処理を施した後、複数枚積層して第
３図示のように所定のコア５を作製する。
上記方法により作られたコア５は第４図に示す
ようにコアホルダー６及びシールドケース７内に
収納され、最終的にシールドケース７内に注入さ
れた樹脂８により固定されて磁気ヘツドを構成す
る。この樹脂８注入時、モールド劣化しやすい
PB材のパーマロイ板１はコア５のテープ摺接側
に位置し、占有面積も少ないので、前記樹脂８の
影響はほとんど受けない。なお、同図中９はコア
５に巻付けたコイル、１０は磁気テープである。
叙上のように、本発明の磁気ヘツドのコア５
は、テープ摺接側をPB材から成るパーマロイ板
１としているために、従来のようなPC材のみか
ら成るコアに較べて、耐摩耗性を改善することが
でき、また、B10が高く、磁気飽和が起きにくい
ために、ダイナミツクレンヂを広げることができ
る。しかも、前記コア５は後方側をPC材とした
ものであるため、PB材のモールド劣化が大きい
という欠点を補い、樹脂８の注入時においても、
従来のPC材のみから成るコアと同様な特性の維
持が図れる等の顕著な効果を奏する。[Table] In addition, B 10 in [Table 1] is a comparison of magnetic flux densities at 10Qe. Also, as is clear from this [Table 1], PB material has a B 10
It has the advantages of high magnetic flux density and high hardness. On the other hand, there is a drawback that deterioration due to molding is large. Therefore, to explain the manufacturing method of the above-mentioned core using drawings, as shown in Fig. 1, first, a permalloy plate 1 made of PB material and each having a thickness of about 1 mm is made.
A permalloy plate 2 made of PC material is prepared, and the two are joined in advance by welding or the like. In addition, 3
is its junction. Next, both the joined permalloy plates 1 and 2 are rolled (cold rolling, etc.) to reduce the thickness.
It is stretched to about 0.1 to 0.3 mm, and as shown in FIG. 2, a core piece 4 having a desired pattern is formed by a method such as press working or photo etching. In addition, at this time, the tape sliding contact side of the core piece 4 is
The PB material and the rear side thereof are the PC material, and the area occupied by the PB material is approximately 1/5 to 2/5 of the entire core piece 4. Subsequently, after subjecting the core pieces 4 to heat treatment, a plurality of core pieces 4 are laminated to form a predetermined core 5 as shown in the third figure. The core 5 made by the above method is housed in a core holder 6 and a shield case 7 as shown in FIG. 4, and is finally fixed with resin 8 injected into the shield case 7 to form a magnetic head. . When injecting this resin 8, the mold easily deteriorates.
Since the permalloy plate 1 made of PB material is located on the tape sliding contact side of the core 5 and occupies a small area, it is hardly affected by the resin 8. In the figure, 9 is a coil wound around the core 5, and 10 is a magnetic tape. As mentioned above, the core 5 of the magnetic head of the present invention
Since the tape sliding contact side is made of permalloy plate 1 made of PB material, the wear resistance can be improved compared to the conventional core made of only PC material, and the B10 is high. Because magnetic saturation is less likely to occur, the dynamic range can be expanded. Moreover, since the core 5 is made of PC material on the rear side, it compensates for the drawback that the mold deterioration of the PB material is large, and even when injecting the resin 8,
It has remarkable effects such as being able to maintain the same characteristics as the conventional core made only of PC material.
図面は何れも本発明に係り、第１図はPB材及
びPC材から成る両パーマロイ板の接合を説明す
る斜視図、第２図は接合されたパーマロイ板上に
所望パターンのコア片を示した要部平面図、第３
図はコアの斜視図、第４図は磁気ヘツドの概略断
側面図である。
１……PB材から成るパーマロイ板、２……PC
材から成るパーマロイ板、３……接合部、４……
コア片、５……コア。
The drawings all relate to the present invention; Fig. 1 is a perspective view illustrating the joining of both permalloy plates made of PB material and PC material, and Fig. 2 shows core pieces with a desired pattern on the joined permalloy plates. Main part plan, 3rd
The figure is a perspective view of the core, and FIG. 4 is a schematic cross-sectional side view of the magnetic head. 1... Permalloy plate made of PB material, 2... PC
Permalloy plate made of material, 3... joint, 4...
Core piece, 5...core.
Claims (1)
パーマロイ板とを接合したコアにおいて、コアの
テープ摺接側を前記PB材、後方側を前記PC材と
したことを特徴とする磁気ヘツドのコア。 ２ それぞれ厚さが１mm程度のPB材から成るパ
ーマロイ板とPC材から成るパーマロイ板とを接
合し、前記両パーマロイ板を圧延により厚さ0.1
〜0.3mm程度に引き延ばし、その後、前記両パー
マロイ板にプレス加工またはフオトエツチ等を施
してコア片を形成し、該コア片を複数枚積層する
ことを特徴とする磁気ヘツドのコアの製造方法。[Claims] 1. A core made by joining a permalloy plate made of PB material and a permalloy plate made of PC material, characterized in that the tape sliding contact side of the core is made of the PB material, and the rear side is made of the said PC material. The core of the magnetic head. 2 A permalloy plate made of PB material and a permalloy plate made of PC material each having a thickness of about 1 mm are joined, and both permalloy plates are rolled to a thickness of 0.1 mm.
A method for producing a core for a magnetic head, comprising stretching the permalloy plates to about 0.3 mm, then pressing or photo-etching both permalloy plates to form core pieces, and laminating a plurality of core pieces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12858979A JPS5654623A (en) | 1979-10-05 | 1979-10-05 | Core of magnetic head and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12858979A JPS5654623A (en) | 1979-10-05 | 1979-10-05 | Core of magnetic head and its manufacture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5654623A JPS5654623A (en) | 1981-05-14 |
| JPS6216443B2 true JPS6216443B2 (en) | 1987-04-13 |
Family
ID=14988484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12858979A Granted JPS5654623A (en) | 1979-10-05 | 1979-10-05 | Core of magnetic head and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5654623A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10512183A (en) * | 1994-12-09 | 1998-11-24 | ザ、プロクター、エンド、ギャンブル、カンパニー | Absorbent composite and absorbent product containing it |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62287243A (en) * | 1986-06-06 | 1987-12-14 | Oji Paper Co Ltd | Substrate body for silver halide photographic sensitive material having undercoat of excellent sticking property |
-
1979
- 1979-10-05 JP JP12858979A patent/JPS5654623A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10512183A (en) * | 1994-12-09 | 1998-11-24 | ザ、プロクター、エンド、ギャンブル、カンパニー | Absorbent composite and absorbent product containing it |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5654623A (en) | 1981-05-14 |
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