| 摘要 |
924,286. Magnetic structures. GENERAL MOTORS CORPORATION. Nov. 14, 1961 [Dec. 8, 1960], No. 40691/61. Class 38 (2). Permanent magnets are produced by a method comprising feeding magnetic ferrite particles, each of which is flat and is inherently magnetized perpendicular to its plane, on to a ferromagnetic base to orientate the particles, embedding the particles in a flexible material, and heating the structure so formed to remove the material and sinter the ferrite. As shown, the ferrite particles are fed on to a drum having a soft iron band which rotates adjacent a roller coated with raw rubber, the particles being pressed into the rubber. The resulting loaded rubber sheet is cut, stacked, fired to burn out the rubber and then fired at a higher temperature to sinter the ferrite. The mass is then magnetized. |
