JPS5698403A - Sintering method of blank material for permanent magnet - Google Patents
Sintering method of blank material for permanent magnetInfo
- Publication number
- JPS5698403A JPS5698403A JP75080A JP75080A JPS5698403A JP S5698403 A JPS5698403 A JP S5698403A JP 75080 A JP75080 A JP 75080A JP 75080 A JP75080 A JP 75080A JP S5698403 A JPS5698403 A JP S5698403A
- Authority
- JP
- Japan
- Prior art keywords
- ring
- molded body
- sintering
- permanent magnet
- shaped
- 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
Abstract
PURPOSE: To prevent dimensional accuracy of the ring-shaped permanent magnet from being deteriorated by a method wherein, in preparing the permanent magnet by sintering a ring-shaped molded body of a ferromagnetic powder, a layer of a specific metal is preliminarily formed on a surface of the ring-shaped molded body and, thereafter, the sintering is carried out.
CONSTITUTION: The ring-shaped molded body 1 having a central pore 2 is formed by press molding the ferromagnetic powder. Subsequently, a metal or an alloy layer 3 having a melting temp. higher than a sintering temp. of said ring-shaped molded body 1 is coated on the surface of said ring-shaped molded body 1 by a vapor deposition method, an electroless plating method or a spattering method. Next, the ring-shaped molded body 1 having said coating layer 3 is placed in a sintering furnace to be heated and subjected the ferrite type ferromagnetic powder to sintering to produce the ring-shaped permanent magnet. Because the ringlike molded body 1 is coated with the metal layer 3, said molded body is not deformed during sintering and the ring-shaped permanent magnet with excellent dimensional accuracy can be produced by a simple operation.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP75080A JPS5698403A (en) | 1980-01-08 | 1980-01-08 | Sintering method of blank material for permanent magnet |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP75080A JPS5698403A (en) | 1980-01-08 | 1980-01-08 | Sintering method of blank material for permanent magnet |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5698403A true JPS5698403A (en) | 1981-08-07 |
Family
ID=11482367
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP75080A Pending JPS5698403A (en) | 1980-01-08 | 1980-01-08 | Sintering method of blank material for permanent magnet |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5698403A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2625132A1 (en) * | 1987-12-28 | 1989-06-30 | Pierre Vironneau | Device making it possible to obtain, by the technique of rotomoulding, hollow parts which include reinforcing ribs |
JPH0499205A (en) * | 1990-08-10 | 1992-03-31 | Taiho Kogyo Kk | Method for sintering metal powder |
-
1980
- 1980-01-08 JP JP75080A patent/JPS5698403A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2625132A1 (en) * | 1987-12-28 | 1989-06-30 | Pierre Vironneau | Device making it possible to obtain, by the technique of rotomoulding, hollow parts which include reinforcing ribs |
JPH0499205A (en) * | 1990-08-10 | 1992-03-31 | Taiho Kogyo Kk | Method for sintering metal powder |
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