Ring magnet and method of manufacturing the magnet

Details Ring magnet and method of manufacturing the magnet Ring magnet and method of manufacturing the magnet

2003-10-29

2009-06-23

Donovan, Lincoln (Department: 2832)

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Magnet structure or material

C148S101000, C419S005000

Reexamination Certificate

active

07551051

ABSTRACT:
Radially oriented ring-shaped preliminarily molded pieces of a ring magnet are stacked in an axial direction to form a ring-shaped molded body, in which end faces of the ring-shaped preliminarily molded pieces are bonded together. This ring-shaped molded body is sintered and heat-treated to produce the ring magnet. Ring magnets which are less susceptible to deterioration of magnetic properties due to a disturbance of magnetic orientation near lamination boundary surfaces are produced. The invention provides a method of manufacturing such ring magnets with high efficiency.

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