Plastic and nonmetallic article shaping or treating: processes – Direct application of electrical or wave energy to work – Producing or treating magnetic product precursor thereof
Patent
1992-10-19
1995-09-26
Fiorilla, Christopher A.
Plastic and nonmetallic article shaping or treating: processes
Direct application of electrical or wave energy to work
Producing or treating magnetic product precursor thereof
264437, B29C 4500
Patent
active
054532248
ABSTRACT:
A hollow member, which serves as a cylinder having an inner configuration which matches the outer configuration of a magnet roller to be manufactured, is mounted in a metallic mold, and then the metallic mold is clamped. A molten resin containing magnetic particles is injected into the mold cavity of hollow member through a runner. Magnetic lines of force are applied to a roller type resin magnet, and such an application is continued. Before the roller type magnetic resin is fully cured, the mold is opened. Then, the magnetic members of a movable mold member 1 are separated from the magnetic members of a stationary mold member, so that the distribution of the magnetic flux passing through the hollow member is changed. When the roller type resin magnet is fully cured by cooling, a magnet roller having two pairs of magnetic poles with different surface magnetic flux densities can be obtained.
REFERENCES:
patent: 4604042 (1986-08-01), Tanigawa et al.
patent: 4661053 (1987-04-01), Yokota et al.
patent: 5181971 (1993-01-01), Ohtsuka
Canon Kabushiki Kaisha
Fiorilla Christopher A.
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