Development of extrusion molded Nd-Fe-B magnets

Journal Article · Thu Dec 31 23:00:00 EST 1992 · IEEE Translation Journal on Magnetics in Japan (Institute of Electrical and Electronics Engineers); (United States)

DOI:https://doi.org/10.1109/TJMJ.1993.4565560· OSTI ID:5838404

Sakata, M; Ikuma, K ^[1]; Watanabe, R; Iwasa, T; Miyadera, H; McAloon, K

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1. Seiko Epson Corp., Tokyo (Japan)

A new manufacturing process for extrusion molded magnets, composed of isotropic Nd-Fe-B powder and Nylon-12, has been developed. This newly developed extrusion molding process has several interesting features. First, the extruded product contains 72% by volume magnetic powder and yields a (BH)[sub max] of 8.0 MGO[sub e]. Second, through the addition of an anti-oxidant, the viscosity of the magnetic powder-nylon compound remains almost constant during molding. Third, by means of a specially cooled outlet, which is separated from the heated die by a thermal insulator, an optimized temperature profile is obtained which yields uniformly smooth extrusion molded magnets. Both long thin-walled magnets and small arc-shaped (kawala) magnets are easily molded by this new process.

• OSTI ID: 5838404
• Journal Information: IEEE Translation Journal on Magnetics in Japan (Institute of Electrical and Electronics Engineers); (United States), Journal Name: IEEE Translation Journal on Magnetics in Japan (Institute of Electrical and Electronics Engineers); (United States) Vol. 8:1; ISSN 0882-4959; ISSN ITJJER
• Country of Publication: United States
• Language: English

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