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Method of manufacturing a rotor

  • US 5,500,994 A
  • Filed: 09/19/1994
  • Issued: 03/26/1996
  • Est. Priority Date: 12/30/1993
  • Status: Expired due to Fees
First Claim
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1. A method for producing a rotor for a miniature electric motor in which a stator is provided within a casing and the rotor is provided so as to face the stator, comprising the following steps of:

  • inserting a rotary shaft into a body of said rotor made of plastic;

    subsequently incorporating the rotor body into a molding die and at the same time positioning said rotary shaft relative to said molding die; and

    thereafter, injecting rare earth plastic magnet material, heated and molten at a temperature higher than a softening point t1 of said rotor body, into said molding die and forming a magnetic layer on an outer circumferential surface of said rotor body.

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