JPS5661114A - Manufacture of ring-shaped magnet unit - Google Patents

Manufacture of ring-shaped magnet unit

Info

Publication number
JPS5661114A
JPS5661114A JP13728879A JP13728879A JPS5661114A JP S5661114 A JPS5661114 A JP S5661114A JP 13728879 A JP13728879 A JP 13728879A JP 13728879 A JP13728879 A JP 13728879A JP S5661114 A JPS5661114 A JP S5661114A
Authority
JP
Japan
Prior art keywords
magnet
compressed
mold
sleeve
ring
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
Application number
JP13728879A
Other languages
Japanese (ja)
Inventor
Hiroomi Takemoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TDK Corp
Original Assignee
TDK Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by TDK Corp filed Critical TDK Corp
Priority to JP13728879A priority Critical patent/JPS5661114A/en
Publication of JPS5661114A publication Critical patent/JPS5661114A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

PURPOSE:To prevent the damage of the ring-shaped magnet and to prevent the drop of a magnet block by forming the ring-shaped magnet by using a metal mold so as to form one body together with a synthetic resin, and compressing the magnetic block into a resin under the heated state. CONSTITUTION:The cylindrical metal mold 1 having a recess 2 at the center of the bottom is heated, and a metal sleeve 3 is fixed to the recess. A material, wherein a thermosetting resin is blended with magnetic powder, a curing agent, and a mold release agent, is injected, pressed and formed by a mold 5. The formed product with the sleeve 3 is taken out of the mold, and N and S poles are alternately magnetized in the circumferential direction, thereby a plastic magnet 7 is completed. Then, the magnet 7 is fixed to the heated metal mold; and the mixture of the thermosetting resin, the curing agent, and the filling material is put in, compressed, and formed. Before it is cooled, an isotropic magnet block 9 is compressed into the specified position, and magnetization is performed. Finally, a shaft 6 is compressed in the sleeve 3. In this constitution, since the sleeve is compressed after it has been formed as one body, the defective plastic magnets are not yielded.
JP13728879A 1979-10-24 1979-10-24 Manufacture of ring-shaped magnet unit Pending JPS5661114A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13728879A JPS5661114A (en) 1979-10-24 1979-10-24 Manufacture of ring-shaped magnet unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13728879A JPS5661114A (en) 1979-10-24 1979-10-24 Manufacture of ring-shaped magnet unit

Publications (1)

Publication Number Publication Date
JPS5661114A true JPS5661114A (en) 1981-05-26

Family

ID=15195172

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13728879A Pending JPS5661114A (en) 1979-10-24 1979-10-24 Manufacture of ring-shaped magnet unit

Country Status (1)

Country Link
JP (1) JPS5661114A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS586408A (en) * 1981-07-06 1983-01-14 Dai Ichi Seiko Co Ltd Electromagnetic rotor
JPS5875023A (en) * 1981-10-30 1983-05-06 Toshiba Mach Co Ltd Magnetic scale
JPS61147111A (en) * 1984-12-20 1986-07-04 Tokico Ltd Production of rotating body for rotation detection
JPH0217837A (en) * 1988-07-06 1990-01-22 Hitachi Ltd Rotor of brushless synchronous motor
JPH02128519U (en) * 1990-01-04 1990-10-23

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS586408A (en) * 1981-07-06 1983-01-14 Dai Ichi Seiko Co Ltd Electromagnetic rotor
JPS5875023A (en) * 1981-10-30 1983-05-06 Toshiba Mach Co Ltd Magnetic scale
JPS61147111A (en) * 1984-12-20 1986-07-04 Tokico Ltd Production of rotating body for rotation detection
JPH0217837A (en) * 1988-07-06 1990-01-22 Hitachi Ltd Rotor of brushless synchronous motor
JPH02128519U (en) * 1990-01-04 1990-10-23

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