JPS6215923B2 - - Google Patents
Info
- Publication number
- JPS6215923B2 JPS6215923B2 JP8673378A JP8673378A JPS6215923B2 JP S6215923 B2 JPS6215923 B2 JP S6215923B2 JP 8673378 A JP8673378 A JP 8673378A JP 8673378 A JP8673378 A JP 8673378A JP S6215923 B2 JPS6215923 B2 JP S6215923B2
- Authority
- JP
- Japan
- Prior art keywords
- sendust
- core
- magnetic
- piston
- coil
- 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
- 238000004519 manufacturing process Methods 0.000 claims description 16
- 239000000696 magnetic material Substances 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims 1
- 229910000702 sendust Inorganic materials 0.000 description 30
- 239000011162 core material Substances 0.000 description 22
- 238000000034 method Methods 0.000 description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 6
- 230000004907 flux Effects 0.000 description 5
- 229910052786 argon Inorganic materials 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 229910000889 permalloy Inorganic materials 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- 238000000465 moulding Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/1272—Assembling or shaping of elements
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Magnetic Heads (AREA)
Description
【発明の詳細な説明】
この発明は磁気ヘツド用コアの製造方法に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a core for a magnetic head.
磁気ヘツド用のコア材料としては、従来パーマ
ロイ、フエライト、センダスト等が用いられてい
たが、パーマロイは磁気テープとの摩擦による摩
耗が大きいため寿命が短く、また飽和磁束密度が
約8000Gで、高保持力テープを消去したり、記録
したりするには、飽和磁束密度が不十分であり、
テープの性能を十分に発揮させるヘツドを製作す
ることが困難であるという欠点を有していた。 Conventionally, permalloy, ferrite, sendust, etc. have been used as core materials for magnetic heads, but permalloy has a short lifespan due to high wear due to friction with the magnetic tape, and has a saturation magnetic flux density of approximately 8000G, making it highly retainable. The saturation magnetic flux density is insufficient to erase or record on a magnetic tape.
The drawback is that it is difficult to manufacture a head that fully demonstrates the performance of the tape.
一方フエライトは耐摩耗性および高周波特性に
ついては優れているが、飽和磁束密度が約5000G
で、上記したパーマロイよりも低く、その上加工
性も悪いので、コアに加工する場合に多大の加工
費を必要とする欠点を有していた。 On the other hand, ferrite has excellent wear resistance and high frequency properties, but its saturation magnetic flux density is approximately 5000G.
This is lower than the above-mentioned permalloy, and its workability is also poor, so it has the drawback of requiring a large amount of processing cost when being processed into a core.
さらにセンダストは耐摩耗性に優れ、飽和磁束
密度も約10000Gと高く、特性面では理想的なヘ
ツドのコア材料と言えるが、フエライト同様に加
工性が悪く、コアを構成しようとすると多大な加
工費を必要とした。そこで近年になつてセンダス
トの加工を容易にするために、溶融したセンダス
トをノズルから噴出させ、回転しているローラー
に当てて急冷し、連続してセンダスト薄帯を製造
する方法が提案されている。しかしこの方法では
センダスト薄帯を製造する条件が非常にせまい範
囲に限られ、その条件外ではセンダストは細かい
粉末になつたり、フレーク状になつたりしてしま
うため量産性に問題があつた。また上記の方法で
作られたセンダスト薄帯から能率良くコアへの加
工を行うためには、プレスでの打抜き加工等が必
要となるが、しかしセンダスト薄帯の加工条件に
よつては、プレス加工が困難なものしか得られず
プレス加工できるという条件をつけると、センダ
スト薄帯の製造条件は益々きびしいものなつてし
まう欠点があつた。 Furthermore, sendust has excellent wear resistance and has a high saturation magnetic flux density of approximately 10,000G, making it an ideal head core material in terms of properties, but like ferrite, it has poor workability and requires a large amount of processing cost to construct the core. required. Therefore, in recent years, in order to make the processing of sendust easier, a method has been proposed in which molten sendust is jetted out of a nozzle and is rapidly cooled by hitting a rotating roller to continuously produce sendust ribbons. . However, with this method, the conditions for producing the sendust ribbon are limited to a very narrow range, and outside of these conditions, the sendust becomes fine powder or flakes, which poses a problem in mass production. In addition, in order to efficiently process the core from the Sendust ribbon made by the above method, it is necessary to perform punching with a press, etc. However, depending on the processing conditions of the Sendust ribbon, pressing However, if we set the condition that it could only be obtained by pressing, which would be difficult to obtain, the manufacturing conditions for Sendust ribbon became increasingly strict.
この発明は叙上の点に鑑みて成されたもので、
その目的とするところは、加工性の悪い磁性材料
から希望する形状のコアを容易に製作できると共
に磁気特性のみを考慮して製作できる磁気ヘツド
用コアの製造方法を提供するにある。 This invention was made in view of the above points,
The object is to provide a method for manufacturing a core for a magnetic head, which allows a core of a desired shape to be easily manufactured from a magnetic material that is difficult to work with, and which can be manufactured by considering only the magnetic properties.
次にこの発明の製造方法を実施するための装置
について説明する。 Next, an apparatus for carrying out the manufacturing method of the present invention will be explained.
１は中を真空又はガス雰囲気にできるような材
料、例えばステンレス等で作られた容器、２は該
容器１内に納められた高周波加熱コイル、３は該
コイル２の略中央に位置し、必要に応じて外部よ
りの操作によつて上記コイル２より外れた位置に
移動可能な材料載置台、４は上記コイル２に接続
される高周波発振器、５，５′は銅または銀等の
熱伝導率の高い材料で作られたピストンにして、
夫々後端にバーメンジユール等の磁性材料で作ら
れた吸引部５ａ，５a′が設けられている。また
夫々の対向面５ｂ，５b′あるいは一方の対向面５
ｂにはコア形状の凹部が形成され、さらに対向面
５ｂ，５b′は適当な間隔を保持して対向してお
り、かつその間隔は上記コイル２の中心真下に位
置している。６，６′は駆動コイル７，７′が捲回
される巻枠にして、適当なクリアランスを介して
上記ピストン５，５′が挿入されている。そして
上記駆動コイル７，７′はスイツチ８を介して直
流電源９に直列接続されている。なお上記実施例
はスイツチ８を閉じると駆動コイル７，７′に通
電されピストン５，５′が互いに矢印の方向に前
進し、その対向面５ｂ，５b′が衝合するようにな
つているが、これは一方のピストンを固定式と
し、他方のピストンのみを駆動コイルの磁力によ
つて前進させ、対向面が衝合するようにしても良
い。 1 is a container made of a material that can create a vacuum or gas atmosphere inside, such as stainless steel; 2 is a high-frequency heating coil housed in the container 1; 3 is located approximately in the center of the coil 2; 4 is a high-frequency oscillator connected to the coil 2, and 5 and 5' are materials with thermal conductivity such as copper or silver. The piston is made of high quality material,
Suction portions 5a and 5a' made of a magnetic material such as Vermendial are provided at the rear ends of each. Also, each opposing surface 5b, 5b' or one opposing surface 5
A core-shaped concave portion is formed in b, and opposing surfaces 5b and 5b' face each other with an appropriate distance between them, and the distance is located directly below the center of the coil 2. Reference numerals 6 and 6' designate winding frames around which drive coils 7 and 7' are wound, into which the pistons 5 and 5' are inserted through appropriate clearances. The drive coils 7, 7' are connected in series to a DC power source 9 via a switch 8. In the above embodiment, when the switch 8 is closed, the drive coils 7, 7' are energized, and the pistons 5, 5' move forward in the directions of the arrows, so that their opposing surfaces 5b, 5b' abut each other. In this case, one piston may be fixed, and only the other piston may be moved forward by the magnetic force of the drive coil, so that the opposing surfaces abut each other.
次に上記した装置によつてコアを製造する方法
について説明する。 Next, a method for manufacturing a core using the above-described apparatus will be explained.
先ず、材料載置台３を磁性材料であるセンダス
トブロツク１０を載せ、該材料載置台３を高周波
コイル２の中心に位置させた後、真空ポンプにて
容器１に設けられた引口１ａより容器１内の空気
を排気し、10-3Torr以上の真空度とする。次に
高周波発振器４を動作させ高周波コイル２に電流
を流す。 First, the sendust block 10, which is a magnetic material, is placed on the material mounting table 3, and after the material mounting table 3 is positioned at the center of the high-frequency coil 2, the container 1 is removed from the opening 1a provided in the container 1 using a vacuum pump. Exhaust the air inside and create a vacuum of 10 -3 Torr or higher. Next, the high frequency oscillator 4 is operated to cause current to flow through the high frequency coil 2.
ここでセンダストブロツク１０は高周波電波の
磁界と、その電磁誘導によつてセンダストブロツ
ク表面に生じた逆向きの電流による磁界との反撥
によつて高周波コイル２中に浮遊するので、材料
載置台３を該コイル２から遠のける。そしてセン
ダストブロツク１０は浮遊した状態で溶融される
が、ここで高周波発振器４の出力を遮断すると、
溶融されたセンダストは球状となつて落下し、ピ
ストン５，５′の対向面５ｂ，５b′間に達する。
この瞬間にスイツチ８を入れると、ピストン５，
５′は夫々矢印の方向に前進衝合し、溶融された
センダストを対向面５ｂ，５b′間で挾んで圧縮す
る。圧縮されたセンダストはピストン５，５′に
より急冷されると同時に、対向面５ｂ，５b′の両
方または一方の凹部によつてコア形状に成形され
る。そして成形が終つたらピストン５，５′をも
との位置にもどし、コアを取り出す。コアは一般
に100μ程度の厚さであるから、短時間で冷却さ
れ成形が完了するので、センダストブロツク１０
の供給と成形されたコアの取り出しを行えば、連
続してコアを製造することができる。 Here, the sendust block 10 floats in the high-frequency coil 2 due to the repulsion between the magnetic field of the high-frequency radio waves and the magnetic field caused by the opposite direction of current generated on the surface of the sendust block due to electromagnetic induction, so the material mounting table 3 is suspended. away from the coil 2. The sendust block 10 is then melted in a floating state, but when the output of the high frequency oscillator 4 is cut off,
The melted sendust falls in a spherical shape and reaches between the opposing surfaces 5b and 5b' of the pistons 5 and 5'.
If switch 8 is turned on at this moment, piston 5,
5' move forward in the direction of the arrows and collide with each other, sandwiching and compressing the melted sendust between the opposing surfaces 5b and 5b'. The compressed sendust is rapidly cooled by the pistons 5, 5', and at the same time is formed into a core shape by the recesses in both or one of the opposing surfaces 5b, 5b'. After the molding is completed, the pistons 5, 5' are returned to their original positions and the core is taken out. Since the core is generally about 100μ thick, it can be cooled and molded in a short time, so Sendust Block 10
By supplying the molded core and taking out the molded core, it is possible to continuously manufacture the core.
ここでセンダスト等の磁性材料は一般に急冷さ
れると結晶粒が小さくなり、磁気特性及び機械的
特性が改善される。また必要とあれば、成形後処
理を施せば、目的の特性が得られる。 Generally, when magnetic materials such as sendust are rapidly cooled, the crystal grains become smaller and the magnetic properties and mechanical properties are improved. Further, if necessary, the desired properties can be obtained by performing post-molding treatment.
上記製造方法はアモルフアスを製造する方法に
似ているが、アモルフアスを作るのではなく、結
晶化した状態のコアを得ることが目的であり、セ
ンダスト等はアモルフアス化すると、かえつて磁
気特性が悪化してしまう。 The above manufacturing method is similar to the method for manufacturing amorphous amorphous, but the purpose is to obtain a core in a crystallized state rather than to create amorphous amorphous, and when sendust etc. is turned into amorphous, the magnetic properties deteriorate instead. I end up.
本実施例はセンダストの場合について述べた
が、センダスト以外の材料、例えばアルバーム、
ボロキユーブ、スーパーセンダスト等の加工性の
悪い材料にも応用することができ、好結果が得ら
れる。 Although this example describes the case of sendust, materials other than sendust, such as album, etc.
It can be applied to materials with poor workability such as boroqueub and supersendust, and good results can be obtained.
上記実施例は高周波加熱によつてセンダストブ
ロツクを溶融する方法について説明したが、他の
方法としては第２図に示す方法がある。 In the above embodiment, the method of melting the sendust block by high frequency heating was explained, but there is another method as shown in FIG. 2.
すなわち図において、１１はアルミナ等の耐熱
性材料で作られたるつぼにして、アルゴンガス導
入口１１ａと、ノズル１１ｂとが設けられてい
る。１２は高周波コイルまたはヒータにして、高
周波コイルの場合は高周波発振器に、ヒータの場
合は適当な電源に接続されている。１３はセンダ
スト等の磁性材料にして、溶融したセンダストは
１３ａの如く所望の大きさ毎に落下する。 That is, in the figure, 11 is a crucible made of a heat-resistant material such as alumina, and is provided with an argon gas inlet 11a and a nozzle 11b. Reference numeral 12 is a high frequency coil or a heater, and the high frequency coil is connected to a high frequency oscillator, and the heater is connected to a suitable power source. Reference numeral 13 is a magnetic material such as sendust, and the molten sendust falls in desired sizes as shown at 13a.
次に製造方法について説明するに、高周波コイ
ルまたはヒータ１２によつて溶融されたセンダス
ト１３は自重により、自重で落下しない場合はア
ルゴンガス導入口１１ａよりアルゴンガスを導入
し、ガス圧によつて溶融されたセンダストを押し
出し所望の大きさのセンダスト１３ａが落下す
る。なお上記においてアルゴンガスを間欠的に導
入すると、所望の大きさのセンダスト１３ａを連
続的に落下させることができる。 Next, to explain the manufacturing method, the sendust 13 melted by the high frequency coil or heater 12 is melted by its own weight.If it does not fall due to its own weight, argon gas is introduced from the argon gas inlet 11a, and the sendust 13 is melted by the gas pressure. The sendust 13a having a desired size is pushed out and falls down. Note that if argon gas is introduced intermittently in the above, sendust 13a of a desired size can be continuously dropped.
そして落下するセンダスト薄帯１３ａを上記第
１図に示したプレス装置にて圧縮、高速冷却して
コアを得ることは同様である。 Similarly, the falling Sendust ribbon 13a is compressed and rapidly cooled using the press shown in FIG. 1 to obtain a core.
この発明は上記したように、溶融した磁性材料
を少なくとも一方のピストンにコア形状の凹部を
形成したプレスによつて圧縮し高速冷却してコア
を形成するものであるから、加工性の悪い磁性材
料から容易にコアを製作でき、従つて耐摩耗性、
飽和磁束密度の優れをコアを製作できると共にコ
アの厚さを薄くすることができるので高周波特性
の優れたヘツドを製作できる外、高保持力テープ
に対応できるヘツドを製作できる等の効果を有す
るものである。 As described above, this invention compresses a molten magnetic material using a press with a core-shaped recess formed in at least one piston and cools it at high speed to form a core. The core can be easily manufactured from
It is possible to manufacture a core with excellent saturation magnetic flux density, and the thickness of the core can be made thin, so it is possible to manufacture a head with excellent high frequency characteristics, and it also has the effect of being able to manufacture a head that can handle high coercive force tapes. It is.
図はこの発明に係る磁気ヘツド用コアの製造方
法を実施するための装置を示し、第１図は第１の
実施例を示す断面図、第２図は他の実施例を示す
断面図である。
１……容器、２……高周波加熱コイル、４……
高周波発振器、５，５′……ピストン、５ｂ，５
b′……凹部が設けられた対向面、７，７′……駆
動コイル、１１……るつぼ、１２……高周波加熱
コイルまたはヒータ。
The figures show an apparatus for carrying out the method of manufacturing a core for a magnetic head according to the present invention, FIG. 1 is a sectional view showing a first embodiment, and FIG. 2 is a sectional view showing another embodiment. . 1... Container, 2... High frequency heating coil, 4...
High frequency oscillator, 5, 5'...Piston, 5b, 5
b'... Opposing surface provided with a recessed portion, 7, 7'... Drive coil, 11... Crucible, 12... High frequency heating coil or heater.
Claims (1)
のピストンにコア形状の凹部を有し、かつ少なく
とも一方のピストンが他方のピストンに向つて前
進衝合するプレスによつて上記溶融した磁性材料
を圧縮し高速冷却する手段より成る磁気ヘツド用
コアの製造方法。1 Compressing the melted magnetic material by a press having a means for melting the magnetic material and a core-shaped recess in at least one piston, and in which at least one piston advances toward the other piston and collides with the other piston. A method of manufacturing a core for a magnetic head comprising means for rapidly cooling the core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8673378A JPS5514526A (en) | 1978-07-18 | 1978-07-18 | Manufacture for magnetic head core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8673378A JPS5514526A (en) | 1978-07-18 | 1978-07-18 | Manufacture for magnetic head core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5514526A JPS5514526A (en) | 1980-02-01 |
| JPS6215923B2 true JPS6215923B2 (en) | 1987-04-09 |
Family
ID=13895025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8673378A Granted JPS5514526A (en) | 1978-07-18 | 1978-07-18 | Manufacture for magnetic head core |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5514526A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4692199A (en) * | 1985-12-13 | 1987-09-08 | Lear Siegler, Inc. | Method and apparatus for bonding fabric to a foam pad |
| US4877753A (en) * | 1986-12-04 | 1989-10-31 | Texas Instruments Incorporated | In situ doped polysilicon using tertiary butyl phosphine |
| JP2720036B2 (en) * | 1987-12-29 | 1998-02-25 | 古河機械金属株式会社 | Ring dust core manufacturing equipment |
-
1978
- 1978-07-18 JP JP8673378A patent/JPS5514526A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5514526A (en) | 1980-02-01 |
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