JPS5668256A - Rotor molding die for miniature motor of watch - Google Patents

Rotor molding die for miniature motor of watch

Info

Publication number
JPS5668256A
JPS5668256A JP14517079A JP14517079A JPS5668256A JP S5668256 A JPS5668256 A JP S5668256A JP 14517079 A JP14517079 A JP 14517079A JP 14517079 A JP14517079 A JP 14517079A JP S5668256 A JPS5668256 A JP S5668256A
Authority
JP
Japan
Prior art keywords
cavity
yoke
rotor
yokes
molding die
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
JP14517079A
Other languages
Japanese (ja)
Inventor
Yuji Kitamura
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.)
Seikosha KK
Original Assignee
Seikosha KK
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 Seikosha KK filed Critical Seikosha KK
Priority to JP14517079A priority Critical patent/JPS5668256A/en
Publication of JPS5668256A publication Critical patent/JPS5668256A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/03—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

PURPOSE:To provide magnetic isotropy only at a rotor magnet by arranging inner and outer yokes of predesigned shape so that the magnetic field acts only on the cavity corresponding to the rotor magnet of the cavity formed symmetrically with the molding die. CONSTITUTION:Cavities 16a-16c of the shape corresponding to a rotor 1 are symmetrically formed at dies 8-10 made of nonmagnetic metal. An inner yoke 17 having radial projection 17a and an outer yoke 18 radially confronted through the cavity 16b with the projection 17a of the yoke 17. are buried in the die 9 formed with the cavity 16b corresponding to the rotor magnet 2. The yokes 17 and 18 are connected through central yoke 19 of predetermined shape and closed magnetic path forming yokes 20, 21, and an excitation coil 22 is wound at the yoke 19. Predetermined plastic magnet material is filled in the cavities 16a-16c in the state that the radial magnetic field is applied only to the part of the cavity 16b by energizing the excitation coil 22, and the rotor 1 is integrally injection molded.
JP14517079A 1979-11-09 1979-11-09 Rotor molding die for miniature motor of watch Pending JPS5668256A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14517079A JPS5668256A (en) 1979-11-09 1979-11-09 Rotor molding die for miniature motor of watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14517079A JPS5668256A (en) 1979-11-09 1979-11-09 Rotor molding die for miniature motor of watch

Publications (1)

Publication Number Publication Date
JPS5668256A true JPS5668256A (en) 1981-06-08

Family

ID=15379044

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14517079A Pending JPS5668256A (en) 1979-11-09 1979-11-09 Rotor molding die for miniature motor of watch

Country Status (1)

Country Link
JP (1) JPS5668256A (en)

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