JPS6292238A - Working method for magnetic disc - Google Patents
Working method for magnetic discInfo
- Publication number
- JPS6292238A JPS6292238A JP23252185A JP23252185A JPS6292238A JP S6292238 A JPS6292238 A JP S6292238A JP 23252185 A JP23252185 A JP 23252185A JP 23252185 A JP23252185 A JP 23252185A JP S6292238 A JPS6292238 A JP S6292238A
- Authority
- JP
- Japan
- Prior art keywords
- shaped
- plastic substrate
- groove
- chamfering
- base
- 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
Landscapes
- Turning (AREA)
- Manufacturing Of Magnetic Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】
(発明の分野)
水元1uJはドーナツ型のプラスデック基板の−Fに磁
気記録媒体を施してなるリジッドタイプディスクの加工
方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of the Invention) Mizumoto 1uJ relates to a method for processing a rigid type disk in which a magnetic recording medium is applied to a donut-shaped plus deck substrate -F.
(従来技術)
中央に開口を有する比較的硬質の円形のプラスチック基
板の上に磁気記録媒体を施してイ(るリジッドタイプの
磁気ディスクが人容吊の磁気ディスクとして使用されて
いるが、この中央の開口には面取りがなされている。こ
の而取りは、円盤状のプラスチック5.1板の中央部を
機械的に切り取った後、片面ずつ、基板を反転させなが
ら機械的に切削加工して行なっており、加工工程上手間
がかかるものとなっている。(Prior art) A rigid type magnetic disk, in which a magnetic recording medium is placed on a relatively hard circular plastic substrate with an opening in the center, is used as a magnetic disk for human suspension. The opening is chamfered. This chamfering is done by mechanically cutting out the center of a disc-shaped plastic 5.1 plate, and then mechanically cutting one side at a time while turning the board over. This makes the processing process time-consuming.
(発明の目的)
本発明は、この面取り工程を簡略化して、この種のディ
スクの生産性を向上させる加工方法を提供することを[
i的とするものである。(Objective of the Invention) The present invention aims to provide a processing method that simplifies this chamfering process and improves the productivity of this type of disk.
It is intended to be i-specific.
(fe明の構成)
本発明の加工方法は、円盤状のプラスチック基板の中央
に円心状に断面V字型の円径のテーパ溝を表裏両面に形
成し、このテーパ溝から中央の部分を機械切削加工によ
り切除してドーナツ状のプラスチック基板を作るように
したことを特徴とするものである。(Structure of Fe Akira) The processing method of the present invention involves forming a tapered groove with a circular diameter of a V-shaped cross section in a concentric manner in the center of a disc-shaped plastic substrate on both the front and back surfaces, and from this tapered groove, the central part is removed. It is characterized in that it is cut out by mechanical cutting to create a donut-shaped plastic substrate.
表裏両面からV字型のテーパ溝が形成されており、ここ
から中央部を切除するので、ディスクの中央に形成され
る間口の縁部には表裏とも面取りが自動的に形成され、
その後の面取り工程が不要となる。A V-shaped tapered groove is formed on both the front and back sides, and since the central part is cut out from there, chamfers are automatically formed on the edges of the frontage formed in the center of the disc on both the front and back.
The subsequent chamfering process becomes unnecessary.
(実 施 例) 以下、図面により本発明の詳細な説明する。(Example) Hereinafter, the present invention will be explained in detail with reference to the drawings.
第1図は本発明により作成された円盤状のプラスチック
基板1を示すもので、プラスチックの射出成形により、
中央のランナー2の周囲に最終的に形成されるべき中央
間口10〈第3図参照〉の径に等しい所定の半径の断面
V字型のテーパ溝3が形成される。この断面を第2図に
拡大して示す。FIG. 1 shows a disc-shaped plastic substrate 1 made according to the present invention, which is made by injection molding of plastic.
A tapered groove 3 having a V-shaped cross section and a predetermined radius equal to the diameter of the central opening 10 (see FIG. 3) to be finally formed is formed around the central runner 2. This cross section is shown enlarged in FIG.
次に、このテーパ溝3から中央部を機械切削加工により
切除する。これにより、第3図に示ずような表裏両側に
テーパ面3△、3Bが面取りとして形成されたドーナツ
状のプラスチック基板1′が形成される。Next, the central portion of the tapered groove 3 is cut out by mechanical cutting. As a result, a donut-shaped plastic substrate 1' having tapered surfaces 3Δ and 3B formed as chamfers on both the front and back sides as shown in FIG. 3 is formed.
(発明の効果) これは、上記テーパ溝3のためにテーパ溝3A。(Effect of the invention) This is the taper groove 3A for the taper groove 3 mentioned above.
3Bが上記機械加工とともに形成されるので、改めて面
取りをする必要がなく、加工工程は1回の切削加工のみ
でよく、きわめて簡略化され生産性が向上する。3B is formed together with the above-mentioned machining process, there is no need to perform chamfering again, and the machining process only requires one cutting process, which greatly simplifies the process and improves productivity.
第1図は本発明による磁気ディスクの加工に使用される
円盤状プラスチック基板の例を示す斜視図、
第2図はその一部切欠断面図、
第3図は中央部分を機械加工により切除した後のドーナ
ツ状プラスチック基板の断面図である。Fig. 1 is a perspective view showing an example of a disk-shaped plastic substrate used for processing a magnetic disk according to the present invention, Fig. 2 is a partially cutaway sectional view of the same, and Fig. 3 is a view after cutting out the central portion by machining. FIG. 2 is a cross-sectional view of a donut-shaped plastic substrate.
Claims (1)
設けてなるリジッドタイプのドーナツ型磁気ディスクの
製造において、円盤状のプラスチック基板に該基板の表
裏両面に、同径の円心状の断面V字形のテーパ溝を形成
し、該基板のこのテーパ溝から中央の部分を機械切削加
工により切除してドーナツ状のプラスチック基板を作る
ことを特徴とする磁気ディスクの加工方法。1) In manufacturing a rigid donut-shaped magnetic disk in which a magnetic recording medium is provided on the surface of a disk-shaped plastic substrate, a circular center-shaped cross section V of the same diameter is placed on both the front and back surfaces of the disk-shaped plastic substrate. 1. A method of processing a magnetic disk, which comprises forming a tapered groove in the shape of a letter, and cutting out a central portion of the substrate from the tapered groove by mechanical cutting to produce a donut-shaped plastic substrate.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23252185A JPS6292238A (en) | 1985-10-18 | 1985-10-18 | Working method for magnetic disc |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23252185A JPS6292238A (en) | 1985-10-18 | 1985-10-18 | Working method for magnetic disc |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6292238A true JPS6292238A (en) | 1987-04-27 |
Family
ID=16940630
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP23252185A Pending JPS6292238A (en) | 1985-10-18 | 1985-10-18 | Working method for magnetic disc |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6292238A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005337421A (en) * | 2004-05-28 | 2005-12-08 | Ntn Corp | Angular ball bearing and its manufacturing method |
-
1985
- 1985-10-18 JP JP23252185A patent/JPS6292238A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005337421A (en) * | 2004-05-28 | 2005-12-08 | Ntn Corp | Angular ball bearing and its manufacturing method |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS6292238A (en) | Working method for magnetic disc | |
US4566178A (en) | Process for assembling a cone speaker | |
JPS60131613A (en) | Floating magnetic head | |
JPS63129578A (en) | Disk like recording medium | |
EP0369784A3 (en) | Magnetic disk and production method thereof | |
US4431487A (en) | Matrixing apparatus and method for use in the manufacture of molded records | |
JPH0452856Y2 (en) | ||
JPS60187022U (en) | Peeling structure on the fixed mold plate side of a mold for forming a disc-shaped recording medium | |
JP2608767B2 (en) | Method of manufacturing magnetic head core | |
JPS58194164A (en) | Manufacture of magnetic head | |
JPS63146246A (en) | Optical disk | |
JPH01235006A (en) | Production of magnetic head | |
JP2818517B2 (en) | Method of manufacturing magnetic head slider and jig used for manufacturing magnetic head slider | |
JPS63113989A (en) | Floating head slider | |
JP2771209B2 (en) | optical disk | |
JPS6316412A (en) | Production of composite floating magnetic head slider | |
JP2605475B2 (en) | Method for manufacturing curved surface of floating magnetic head core | |
JPS63142070U (en) | ||
JPH0434216B2 (en) | ||
JPH05151522A (en) | Production of magnetic head | |
JPS5712615A (en) | Manufacture of block for record pressing mold | |
JPS5818688B2 (en) | Manufacturing method of multi-head core slider for magnetic disks | |
JPH01103022U (en) | ||
JPS6282504A (en) | Production of magnetic head | |
JPH02240818A (en) | Production of floating type magnetic head |