Plastic article or earthenware shaping or treating: apparatus – Means applying electrical or wave energy directly to work – Radiated energy
Patent
1989-04-25
1990-02-27
Hoag, Willard
Plastic article or earthenware shaping or treating: apparatus
Means applying electrical or wave energy directly to work
Radiated energy
264 24, 4251748R, B29C 3300, B29C 3926, B29C 4540
Patent
active
049041754
ABSTRACT:
A magnetic plastic rotor disk manufacturing apparatus according to the present invention is capable of manufacturing a plurality of magnetic plastic rotor disks having equal desired surface magnetic flux density distribution characteristics in a single molding cycle.
The apparatus comprises a metal mold composed of a pair of half molds and having a plurality of cavities for receiving magnetic plastic material therein, etiher one or a plurality of magnetic field creating coils for creating one or a plurality of magnetic fields to magnetize and orient the magnetic particles in the above magnetic plastic material injected into the cavities, and also a plurality of yokes, one of which by any means extends from the central portion thereof along the splitting surface of the metal mold toward the above cavities formed on a circle concentrically formed therein so as to guide the magnetic fluxes of the magnetic fields created by the above coils to flow radially from the central portion of the same toward the periphery thereof. Thus, the magnetic plastic rotor disks formed in the cavities are exposed uniformly and diametrically to the magnetic flux, enabling them having a satisfactorily large surface magnetic flux density.
REFERENCES:
patent: 2999271 (1961-09-01), Falk et al.
patent: 3555621 (1971-01-01), Hara
patent: 3842148 (1974-10-01), Loubier
patent: 4333895 (1982-06-01), Strawson et al.
patent: 4678616 (1987-07-01), Kawashima
Horibe Kinya
Hoshino Yasukazu
Kawai Masazumi
Tsuji Koichiro
Uchida Kiyofumi
Hoag Willard
Yazaki -Corporation
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