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Method for assembling a stator for an electric machine

  • US 4,173,822 A
  • Filed: 12/30/1977
  • Issued: 11/13/1979
  • Est. Priority Date: 07/10/1975
  • Status: Expired due to Term
First Claim
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1. A method of assembling a stator for an electric machine of the type having a bell-shaped rotor, a permanent magnet, a face plate holding said permanent magnet, a flux return ring abutting said face plate with one of its end faces and concentrically surrounding said permanent magnet, a casing intimately surrounding the outer surface of said flux return ring, comprising the steps of:

  • (a) sliding the permanent magnet into the interior of a support die, a plunger fitting into said die having an inner wall defining a cylindrical portion, the diameter of which corresponds to the inner diameter of the air gap space of said machine;

    (b) sliding a flux return ring over the outer wall of said plunger;

    (c) placing over the assembly, so obtained, a casting mold having a cavity conforming to the configuration of said stator;

    (d) closing said mold and injecting plastic material thereinto;

    (e) allowing the plastic material to harden;

    (f) retracting the plunger from said die; and

    (g) disassembling said die mold and removing the stator therefrom.

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