Press machine and method for producing magnet
AssigneeHitachi Metals, Ltd.
InventorsTsutomu Harada, Takashi Tajiri, Shuichi Okuyama
Life of this patent
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Abstract
A press machine 10 includes a die 12 with a through hole 12a that defines a cavity, a first press surface 14a and a second press surface 16a for pressing a magnetic powder 18 loaded in the cavity, and magnetic field generating means for applying an aligning magnetic field to the magnetic powder 18 in the cavity. At least one of the first and second press surfaces 14a and 16a has a region made of a material having a Vickers hardness that is higher than 200 but equal to or lower than 450. In pressing the powder under the aligning magnetic field, the press machine 10 minimizes the disturbance in the orientation of the powder.
Claims7
A press machine comprising:
- a die with a through hole that defines a cavity;
- a first press surface and a second press surface for pressing a magnetic powder loaded in the cavity;
- and
- magnetic field generating means for applying an aligning magnetic field to the magnetic powder in the cavity,
- wherein at least one of the first and second press surfaces has a first region, which is made of a first material having a Vickers hardness that is higher than 200 but equal to or lower than 450, and
- wherein the first region can be deformed plastically under a force pressing the magnetic powder particles.
Dependencies are inferred from the claim text.