JPH0320805B2 - - Google Patents
Info
- Publication number
- JPH0320805B2 JPH0320805B2 JP3055183A JP3055183A JPH0320805B2 JP H0320805 B2 JPH0320805 B2 JP H0320805B2 JP 3055183 A JP3055183 A JP 3055183A JP 3055183 A JP3055183 A JP 3055183A JP H0320805 B2 JPH0320805 B2 JP H0320805B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic head
- wear
- nickel plating
- core
- film layer
- 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
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 50
- 238000007747 plating Methods 0.000 claims description 27
- 229910052759 nickel Inorganic materials 0.000 claims description 26
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000011236 particulate material Substances 0.000 claims description 5
- 239000011162 core material Substances 0.000 description 39
- 238000010586 diagram Methods 0.000 description 6
- 239000010419 fine particle Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 229910000889 permalloy Inorganic materials 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 3
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 2
- 229910000423 chromium oxide Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000002815 nickel Chemical class 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910004261 CaF 2 Inorganic materials 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 239000011019 hematite Substances 0.000 description 1
- 229910052595 hematite Inorganic materials 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000010030 laminating 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
- 239000002245 particle Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 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
- G11B5/10—Structure or manufacture of housings or shields for heads
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Magnetic Heads (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、耐摩耗性を有する磁気ヘツドに関す
るものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a magnetic head having wear resistance.
（従来技術）
磁気ヘツドでは、磁気テープがその磁気ヘツド
のテープ摺接面に摺接走行する構成であるため
に、その磁気ヘツドのテープ摺接面が摩耗し、録
音再生ヘツドにおいては録音再生特性が変化し、
再生ヘツドにおいてはその再生特性が変化し、消
去ヘツドにおいてはその消去特性が変化する。そ
こで、従来、高硬度のパーマロイ材料をコアの素
材として使用しているが、コスト的に高いわりに
は耐摩耗性が良好でないという問題がある。ま
た、各コアの外周に酸化クロムを析出してこの酸
化クロムを利用して極力コアが摩耗しないように
したものもあるが、各コアに酸化クロムを析出さ
せる構成のものは、各コアにストレスが生じて保
磁力等の磁気特性が劣化し、好ましくない。さら
に、各コアを積層接着して、積層コア体を形成す
る際に、耐磨耗性微粒子物質を接着剤に分散配合
するものもあるが、分散が不均一となつて、摩耗
にばらつきを生じるという問題がある。(Prior art) Since the magnetic head is configured so that the magnetic tape runs in sliding contact with the tape sliding surface of the magnetic head, the tape sliding surface of the magnetic head wears out, and the recording/playback characteristics of the recording/playback head deteriorate. changes,
The reproduction characteristics of the reproduction head change, and the erasure characteristics of the erase head change. Conventionally, highly hard permalloy materials have been used as the core material, but this has the problem of being expensive and not having good wear resistance. In addition, there are some products in which chromium oxide is deposited on the outer periphery of each core and this chromium oxide is used to prevent the core from wearing out as much as possible. This is undesirable because magnetic properties such as coercive force deteriorate. Furthermore, when each core is laminated and bonded to form a laminated core body, there are some products in which abrasion-resistant particulate matter is dispersed and blended into the adhesive, but the dispersion becomes uneven, resulting in uneven wear. There is a problem.
（発明の目的）
本発明は、上記従来の有する欠点に鑑みてなさ
れたもので、耐摩耗性に好適の磁気ヘツドを提供
することにある。(Object of the Invention) The present invention has been made in view of the above-mentioned drawbacks of the conventional magnetic head, and an object of the present invention is to provide a magnetic head suitable for wear resistance.
（発明の構成）
本発明の構成は、積層コア体を構成する各コア
の外周にニツケルメツキ皮膜層が形成され、この
ニツケルメツキ皮膜層が形成された各コアは、
250度Ｃ〜500度のＣの範囲の温度において熱処理
が施されている磁気ヘツドである。(Structure of the Invention) The structure of the present invention is that a nickel plating film layer is formed on the outer periphery of each core constituting the laminated core body, and each core on which this nickel plating film layer is formed,
The magnetic head is heat treated at temperatures ranging from 250 degrees Celsius to 500 degrees Celsius.
（実施例）
以下に本発明に係る磁気ヘツドの実施例を図面
に基づいて説明する。(Example) Examples of the magnetic head according to the present invention will be described below based on the drawings.
第１図は、本発明に係る磁気ヘツドの外観を示
すものであり、この図において、１はシールドケ
ース、２は磁気テープ摺接面であつて、ここで
は、磁気ヘツドとしてステレオ式の磁気ヘツドが
示されており、シールドケース２には、第２図に
示すようにレジン３が注入されて硬化されてお
り、４は１チヤンネル側の積層コア体、５は２チ
ヤンネル側の積層コア体であつて、積層コア体４
と積層コア体５との間にはシールド板６が介在さ
れ、シールドケース２は、パーマロイ板７，７と
クラツド材として耐摩耗性金属板８とから大略構
成されており、シールドケース１の前面を研摩仕
上げして磁気テープ摺接面を形成する際シールド
ケース１の前面に露呈されるものであり符号Ｘ−
Ｘはその磁気テープ摺接面の位置を示す。積層コ
ア体４，５は、各一対設けられている。その対向
間に磁気ギヤツプ９，９が形成されるものであ
り、積層コア体４，５は第３図に示すように、各
コア１０を積層接着して構成されるものである。
各コア１０には、各々ニツケルメツキ皮膜層１１
がその外周全域にわたつて形成されており、ここ
では、無電解ニツケルメツキ液（日本カニゼン社
製の品名SC−8D）の浴中に各コアを浸漬してこ
のニツケルメツキ皮膜層１１を形成するものとさ
れており、このニツケルメツキ皮膜層１１が形成
された各コアは、その後に、250度Ｃ〜500度Ｃの
範囲の温度において約１時間程度熱処理を施こさ
れるものであり、この熱処理によつて硬度アツプ
された後に、積層接着されて積層コア体４，５と
されるものである。 FIG. 1 shows the external appearance of a magnetic head according to the present invention. In this figure, 1 is a shield case and 2 is a magnetic tape sliding surface. Here, a stereo type magnetic head is used as a magnetic head. As shown in FIG. 2, a resin 3 is injected into the shield case 2 and hardened. 4 is a laminated core body on the 1st channel side, and 5 is a laminated core body on the 2nd channel side. Then, the laminated core body 4
A shield plate 6 is interposed between the shield case 2 and the laminated core body 5, and the shield case 2 is roughly composed of permalloy plates 7, 7 and a wear-resistant metal plate 8 as a cladding material. It is exposed on the front surface of the shield case 1 when polishing and finishing it to form a sliding contact surface for the magnetic tape, and it is designated by the symbol X-.
X indicates the position of the magnetic tape sliding surface. A pair of laminated core bodies 4 and 5 are provided. A magnetic gap 9, 9 is formed between the opposing cores, and the laminated core bodies 4, 5 are constructed by laminating and bonding each core 10, as shown in FIG.
Each core 10 has a nickel plating film layer 11.
is formed over the entire outer periphery, and here, each core is immersed in a bath of electroless nickel plating liquid (trade name: SC-8D, manufactured by Nippon Kanizen Co., Ltd.) to form this nickel plating film layer 11. Each core on which the nickel plating film layer 11 has been formed is then heat treated at a temperature in the range of 250 degrees Celsius to 500 degrees Celsius for about one hour. After increasing the hardness, they are laminated and bonded to form the laminated core bodies 4 and 5.
第４図はその磁気テープ摺接面１２の摩耗状態
を説明するためのもので、この図に示すように、
各コア１０は硬度の高いニツケルメツキ皮膜層１
１によつてサンドイツチ状にはさまれることとな
るから、磁気テープ摺接面の摩耗が抑制されるこ
ととなり、耐摩耗性が向上することとなる。 FIG. 4 is for explaining the wear condition of the magnetic tape sliding contact surface 12. As shown in this figure,
Each core 10 has a hard nickel plating layer 1
Since the magnetic tape is sandwiched in a sandwich-like pattern by the magnetic tapes 1 and 2, wear of the sliding contact surface of the magnetic tape is suppressed, and wear resistance is improved.
第５図は本発明に係る磁気ヘツドの積層コア体
４，５の第２の実施例を示すものでニツケルメツ
キ皮膜層１１に耐摩性微粒子物質１３を分散させ
たものであり、各コアの無電界ニツケルメツキ液
浴中への浸漬条件は以下の通りである。 FIG. 5 shows a second embodiment of the laminated core bodies 4 and 5 of the magnetic head according to the present invention, in which a wear-resistant fine particle material 13 is dispersed in a nickel plating film layer 11, and the electric field of each core is The conditions for immersion in the Nikkelmetsuki liquid bath are as follows.
無電解ニツケルメツキ液 1000cc
耐摩耗性微粒子物質１リツトリ当り0.5〜20ｇ
粒度0.05〜１ミクロン
メツキ液の浴温度 70℃〜100℃
ここで、耐摩性微粒子物質１３は、磁気ヘツド
の耐摩耗性をさらに一層向上させるために、無電
解ニツケルメツキ液中に分散配合したものであ
り、この耐摩性微粒子物質１３としては、SiC、
Si3N4、CaF2、BN、Al2O3、TiC、TiN、CrO3、
CiO2、ダイヤモンド等の微粒子物質を使用でき
る。この耐摩性微粒子１３は、各コア１０の表面
にニツケルメツキ皮膜層１１としてのニツケル合
金が析出される際に、ニツケルメツキ皮膜層１１
に取りこまれるものであり、ここでは、ニツケル
メツキ皮膜層１１の層厚は0.5ないし５ミクロン
とされてその硬度はHV約500となつている。こ
の耐摩耗性微粒子物質１３が分散されたニツケル
メツキ皮膜層１１を有する各コアは、その後に、
250度Ｃ〜450度Ｃの範囲の温度において熱処理を
施され、硬度がHV1000〜1500にアツプされて、
その後に積層コア体が形成されるものである。第
６図はこの熱処理温度と摩耗料との関係を示す特
性図であつて、横軸は熱処理温度、縦軸は摩耗量
を示し、○印は磁気ヘツドの磁気テープ摺接面に
磁気テープを1000時間走行させたときの摩耗量を
示している。Electroless nickel plating liquid 1000 cc Wear-resistant fine particulate material 0.5 to 20 g per liter of particle size 0.05 to 1 micron Plating liquid bath temperature 70°C to 100°C Here, the wear-resistant particulate material 13 further improves the wear resistance of the magnetic head. In order to improve the wear resistance, it is dispersed and blended in an electroless nickel plating liquid, and this fine particle material 13 includes SiC,
Si 3 N 4 , CaF 2 , BN, Al 2 O 3 , TiC, TiN, CrO 3 ,
Particulate materials such as CiO 2 and diamond can be used. These wear-resistant fine particles 13 are formed in the nickel plating film layer 11 when the nickel alloy as the nickel plating film layer 11 is deposited on the surface of each core 10.
Here, the thickness of the nickel plating layer 11 is 0.5 to 5 microns, and its hardness is approximately HV 500. Each core having the nickel plating layer 11 in which the wear-resistant particulate material 13 is dispersed is then
It is heat treated at a temperature in the range of 250 degrees C to 450 degrees C, and the hardness is increased to HV1000 to 1500.
After that, a laminated core body is formed. Figure 6 is a characteristic diagram showing the relationship between heat treatment temperature and abrasion charge. It shows the amount of wear after running for 1000 hours.
第７図は、従来の高硬度パーマロイを磁気コア
に使用した磁気ヘツドと本発明に係る磁気ヘツド
との摩耗量を比較して示す摩耗特性図であつて、
横軸はテープ走行時間、縦軸は摩耗量であり、△
印は高硬度パーマロイを磁気コアに使用したとき
の磁気ヘツドの摩耗量、●印はニツケルメツキ皮
膜層が形成された磁気コアに熱処理を施こさずに
この磁気コアを使用したときの磁気ヘツドの摩耗
量、○印はニツケルメツキ皮膜層に耐摩耗性微粒
子物質が分散配合された磁気コアに熱処理を施こ
さずにこの磁気コアを使用したときの磁気ヘツド
の摩耗量、▲印はニツケルメツキ皮膜層が形成さ
れた磁気コアに熱処理を施こしてこの磁気コアを
使用したときの磁気ヘツドの摩耗量、□印はニツ
ケルメツキ皮膜層に耐摩性微粒子物質が分散配合
された磁気コアに熱処理を施してこの磁気コアを
使用したときの磁気ヘツドの摩耗量を示すもので
あつて、テープ走行時間が大きくなればなる程、
従来の磁気ヘツドと本発明に係る磁気ヘツドとの
差が顕著になること明らかである。 FIG. 7 is a wear characteristic diagram showing a comparison of the amount of wear between a magnetic head using a conventional high-hardness permalloy in its magnetic core and a magnetic head according to the present invention.
The horizontal axis is the tape running time, the vertical axis is the amount of wear, and △
The mark is the amount of wear on the magnetic head when high-hardness permalloy is used for the magnetic core, and the mark is the wear on the magnetic head when the magnetic core with a nickel plating film layer is used without heat treatment. The mark ○ indicates the amount of wear on the magnetic head when a magnetic core with wear-resistant fine particles dispersed in the nickel plating film layer is used without heat treatment, and the mark ▲ indicates the amount of wear on the magnetic head formed by the nickel plating film layer. The amount of wear on the magnetic head when using a magnetic core that has been heat-treated. This indicates the amount of wear on the magnetic head when using a tape, and the longer the tape running time, the more
It is clear that the difference between the conventional magnetic head and the magnetic head according to the present invention is significant.
なお、この摩耗特性図を得るためのテスト条件
は以下の通りである。 The test conditions for obtaining this wear characteristic diagram are as follows.
使用気…オートリピート式のカセツトテープ
レコーダ
テープの走行スピード…約4.75cm／Ｓ
温湿度…25℃−65％
使用テープ…γヘマタイトテープ（商品名
TDK DC−90）
テープ交換…100hrに１回
以上実施例では、無電解ニツケルメツキ液を利
用してニツケルメツキ皮膜層を形成するようにし
たが、電気メツキによつてニツケルメツキ皮膜層
を形成することもできる。 Air used: Auto-repeat cassette tape recorder Tape running speed: approx. 4.75cm/S Temperature/humidity: 25℃-65% Tape used: γ-hematite tape (product name)
TDK DC-90) Tape replacement...Once every 100 hours In the above examples, the nickel plating film layer was formed using an electroless nickel plating solution, but the nickel plating film layer can also be formed by electroplating. .
（発明の効果）
本発明は、以上説明したように、各コアの外周
にニツケルメツキ皮膜層を形成し、これに熱処理
を施して硬度をアツプさせ、その後に積層コア体
を構成するものであるから、磁気ヘツドの耐摩耗
性の向上に寄与する他に、ニツケルメツキ皮膜層
がこの熱処理を施されることによつて酸化物層と
なつて各コア間が絶縁されることとなるから、各
コアに発生する渦電流を防止するという積層効果
が一層上昇し、積層コア体を有する磁気ヘツドの
磁気特性の向上に貢献すると共に、耐摩耗性を有
する磁気ヘツドを安価に製作できる。(Effects of the Invention) As explained above, the present invention forms a nickel plating film layer on the outer periphery of each core, heat-treats it to increase hardness, and then constructs a laminated core body. In addition to contributing to improving the wear resistance of the magnetic head, the heat treatment of the nickel plating film layer turns into an oxide layer that insulates each core. The laminated effect of preventing generated eddy currents is further improved, contributing to improving the magnetic properties of the magnetic head having a laminated core body, and making it possible to manufacture a magnetic head with wear resistance at a low cost.
第１図は本発明に係る磁気ヘツドの外観図、第
２図は本発明に係る磁気ヘツドの部分断面図、第
３図は本発明に係る積層コア体の拡大図、第４図
は本発明に係る積層コア体の摩耗状態を示す特性
図、第５図は本発明に係る積層コア体の他の例を
示す拡大図、第６図は熱処理温度と摩耗量との関
係を示す特性図、第７図は、従来の高硬度パーマ
ロイを磁気ヘツドと本発明に係る磁気ヘツドとの
摩耗量を比較して示す摩耗特性図、である。
１……シールドケース、２……磁気テープ摺接
面、４，５……積層コア体、１０……コア、１１
……ニツケルメツキ皮膜層、１３……耐摩耗性微
粒子物質。
FIG. 1 is an external view of a magnetic head according to the present invention, FIG. 2 is a partial sectional view of a magnetic head according to the present invention, FIG. 3 is an enlarged view of a laminated core body according to the present invention, and FIG. 4 is a diagram of the present invention. FIG. 5 is an enlarged view showing another example of the laminated core body according to the present invention, and FIG. 6 is a characteristic diagram showing the relationship between heat treatment temperature and amount of wear. FIG. 7 is a wear characteristic diagram showing a comparison of the amount of wear between a conventional high-hardness permalloy magnetic head and a magnetic head according to the present invention. DESCRIPTION OF SYMBOLS 1... Shield case, 2... Magnetic tape sliding contact surface, 4, 5... Laminated core body, 10... Core, 11
...Nickel plating film layer, 13...Abrasion-resistant fine particle material.
Claims (1)
ルメツキ被膜層が形成され、該ニツケルメツキ被
膜層が形成された各コアは、250度Ｃ〜500度Ｃの
範囲において熱処理が施されることにより、耐磨
耗性を向上した磁気ヘツド。 ２ 特許請求の範囲第１項において、前記ニツケ
ルメツキ被膜層に耐磨耗性微粒子物質が分散され
ている磁気ヘツド。[Claims] 1. A nickel plating film layer is formed on the outer periphery of each core constituting the laminated core body, and each core on which the nickel plating film layer is formed is subjected to heat treatment in the range of 250 degrees Celsius to 500 degrees Celsius. Magnetic head with improved wear resistance. 2. The magnetic head according to claim 1, wherein a wear-resistant particulate material is dispersed in the nickel plating layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3055183A JPS59229728A (en) | 1983-02-25 | 1983-02-25 | Magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3055183A JPS59229728A (en) | 1983-02-25 | 1983-02-25 | Magnetic head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59229728A JPS59229728A (en) | 1984-12-24 |
| JPH0320805B2 true JPH0320805B2 (en) | 1991-03-20 |
Family
ID=12306927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3055183A Granted JPS59229728A (en) | 1983-02-25 | 1983-02-25 | Magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59229728A (en) |
-
1983
- 1983-02-25 JP JP3055183A patent/JPS59229728A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59229728A (en) | 1984-12-24 |
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