Device for manufacturing permanent magnet
A permanent magnet manufacturing apparatus includes a compression molding mechanism and a magnetic field generating mechanism. The compression molding mechanism includes a pair of punches facing each other, and a die having a tubular shape into which the pair of punches are inserted. The magnetic field generating mechanism includes a pair of coils. The compression molding mechanism is disposed between the pair of coils. A raw material containing magnet powder is supplied into the die. The raw material in the die is compressed by the pair of punches while a magnetic field generated by at least one of the coils is applied to the raw material. A direction of the magnetic field applied to the raw material is changed by at least one operation selected from a group consisting of a movement of an entirety of the magnetic field generating mechanism, a rotation of the entirety of the magnetic field generating mechanism, and a rotation of at least one of the coils.
1 . A permanent magnet manufacturing apparatus comprising:
a compression molding mechanism; and
a magnetic field generating mechanism,
wherein the compression molding mechanism includes a pair of punches facing each other, and a die having a tubular shape into which the pair of punches are inserted,
the magnetic field generating mechanism includes a pair of coils,
the compression molding mechanism is disposed between the pair of coils,
the compression molding mechanism does not penetrate through an inside of each of the pair of coils,
the die includes a space between the pair of punches into which a raw material containing magnet powder is capable of being supplied,
a magnetic field is generated by at least one of the pair of coils,
the pair of punches is configured to compress raw material in the die while applying the magnetic field to the raw material in the die in order to form a compact from the raw material,
the apparatus includes means for changing a direction of the magnetic field applied to raw material in the die by at least one of a movement of an entirety of the magnetic field generating mechanism, a rotation of the entirety of the magnetic field generating mechanism and a rotation of at least one of the coils,
a pressing direction is defined as a direction in which the pair of punches face each other,
a distance from a rotation axis of the entirety of the magnetic field generating mechanism to one coil is equal to a distance from the rotation axis to the other coil,
the rotation axis is perpendicular to the pressing direction, and
the entirety of the magnetic field generating mechanism is configured to rotate about the rotation axis.
2 . A permanent magnet manufacturing apparatus comprising:
a compression molding mechanism; and
a magnetic field generating mechanism,
wherein the compression molding mechanism includes a pair of punches facing each other, and a die having a tubular shape into which the pair of punches are inserted,
the magnetic field generating mechanism includes a pair of coils,
the compression molding mechanism is disposed between the pair of coils,
the compression molding mechanism does not penetrate through an inside of each of the pair of coils,
the die includes a space between the pair of punches into which a raw material containing magnet powder is capable of being supplied,
a magnetic field is generated by at least one of the pair of coils,
the pair of punches is configured to compress raw material in the die while applying the magnetic field to the raw material in the die in order to form a compact from the raw material,
the apparatus includes means for changing a direction of the magnetic field applied to raw material in the die by at least one of a movement of an entirety of the magnetic field generating mechanism, a rotation of the entirety of the magnetic field generating mechanism and a rotation of at least one of the coils,
a pressing direction is defined as a direction in which the pair of punches face each other, and
at least one of the coils is configured to rotate such that an angle between a central axis of the one coil and the pressing direction is changed.