APPARATUS AND METHOD FOR CHARGING MAGNETIC POWDER

Japanese Patent JP3851281

B2

PROBLEM TO BE SOLVED: To provide an apparatus for charging a magnetic powder, which reduces a difference in a packing density of the magnetic powder among the positions in a pressurized axis direction, and to provide a method for charging the magnetic powder.
SOLUTION: This charging apparatus comprises a magnetic forming die consisting of an upper die 1 and a lower die 2, a channel 2a formed in the lower die 2, which penetrates both end faces 2b of the lower die 2 and has a desired cross-sectional shape, a pair of movable punches 3a and 3b which are inserted from both ends of the lower die 2 and engaged to the channel 2a so as to form a cavity for accommodating a charged magnetic powder therein, permanent magnets 6a and 6b which produce a magnetic field so as to penetrate the channel 2a, a magnetic field-moving means 4 for moving a magnetic field with respect to the magnet-forming die by bidirectionally moving the permanent magnets 6a and 6b along the moving directions of a pair of the punches 3a and 3b, and a punch-moving means 5 for fixing any one of a pair of the punches 3a and 3b and moving the other punch toward the center of the channel 2a along the direction of moving the permanent magnets 6a and 6b.

Jinichi Furukawa
Taizo Iwami
Cormorant fishing
Shuichi Takahama

JP2003038101A

November 29, 2006

February 17, 2003

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Mitsubishi Electric Corporation

B22F3/02; B30B11/00; B22F3/03; B22F3/035; B30B11/02; H01F41/02; (IPC1-7): B22F3/035; B22F3/02; B22F3/03; B30B11/00; B30B11/02; H01F41/02

JP2000353632A

Keigo Murakami
Masuo Oiwa
Toshihide Kodama
Takenaka Ikuo

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