Title:
DEVICE FOR MOLDING CYLINDRICAL RESIN MAGNET
Document Type and Number:
Japanese Patent JP3745509
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a device for manufacturing a cylindrical resin magnet whose magnetic force is high in linearity.
SOLUTION: A cylindrical resin magnet molding device is equipped with an extrusion kneader 6, which heats and extrudes a material mixture which contains ferromagnetic particles and thermoplastic resin into a molding cavity 73, a mold 7 provided with the molding cavity 73 to pass the kneaded material molding it into a cylinder, and a magnetic field generating member 8 which generates an orientation magnetic field inside the molding cavity 73. In this case, a means (annular end spacer) which improves the kneaded material extruded into the molding cavity 73 in inner pressure is provided in a region Z of the molding cavity 73, where the orientation magnetic field is applied.
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Inventors:
Ryuji Goto
Hiroaki Kobayashi
Hiroaki Kobayashi
Application Number:
JP23153097A
Publication Date:
February 15, 2006
Filing Date:
August 27, 1997
Export Citation:
Assignee:
Neomax corporation
neomax Kiko Co., Ltd.
neomax Kiko Co., Ltd.
International Classes:
G03G15/09; H01F41/02; B30B11/00; H01F1/113; (IPC1-7): H01F41/02; G03G15/09; //B30B11/00; H01F1/113
Domestic Patent References:
| JP6168836A | ||||
| JP5190366A | ||||
| JP7249538A |
Attorney, Agent or Firm:
Takaishi Tachibana