Milling and classifying apparatus, collision mill, air classifier, toner, and method for producing toner

A method for producing a toner by means of a milling and classifying apparatus,

• wherein the milling and classifying apparatus comprises a collision mill and an air classifier,
• the collision mill comprises a jet nozzle configured to eject jet stream into a milling room, a path configured to feed a powder to be milled into the jet stream, and a collision plate disposed opposite to the jet nozzle,
• a collision member is further mounted to a support of the collision plate at downstream of the collision plate, and the powder collides with the collision member following the collision with the collision plate,
• the air classifier comprises a dispersion room into which a mixture of primary air and the powder is introduced, and a classification room which is equipped with a center core at the upper side, a separator core at the lower side, and a secondary air inlet at the side wall,
• the classification room is disposed below the dispersion room, and the mixture of the primary air and the powder flows from the dispersion room into the classification room, and
• a flow stabilizer is arranged at a central suction of the separator core to control swirl stream generated within the classification room so as to centrifuge the powder into coarse particles and fine particles by action of the swirl stream.

A toner produced by means of a milling and classifying apparatus,

• wherein the milling and classifying apparatus comprises a collision mill and an air classifier,
• the collision mill comprises a jet nozzle configured to eject jet stream into a milling room, a path configured to feed a powder to be milled into the jet stream, and a collision plate disposed opposite to the jet nozzle,
• a collision member is further mounted to a support of the collision plate at downstream of the collision plate, and the powder collides with the collision member following the collision with the collision plate,
• the air classifier comprises a dispersion room into which a mixture of primary air and the powder is introduced, and a classification room which is equipped with a center core at the upper side, a separator core at the lower side, and a secondary air inlet at the side wall,
• the classification room is disposed below the dispersion room, and the mixture of the primary air and the powder flows from the dispersion room into the classification room, and
• a flow stabilizer is arranged at a central suction of the separator core to control swirl stream generated within the classification room so as to centrifuge the powder into coarse particles and fine particles by action of the swirl stream.

A collision mill, comprising:

• a jet nozzle configured to eject jet stream into a milling room,
• a path configured to feed a powder to be milled into the jet stream, and
• a collision plate disposed opposite to the jet nozzle,
• wherein a collision member is further mounted to a support of the collision plate at downstream of the collision plate, and the powder collides with the collision member following the collision with the collision plate.

An air classifier, comprising:

• a dispersion room into which a mixture of primary air and the powder is introduced, and
• a classification room which is equipped with a center core at the upper side, a separator core at the lower side, and a secondary air inlet at the side wall,
• wherein the classification room is disposed below the dispersion room, and the mixture of the primary air and the powder flows from the dispersion room into the classification room, and
• a flow stabilizer is arranged at a central suction of the separator core to control swirl stream generated within the classification room so as to centrifuge the powder into coarse particles and fine particles by action of the swirl stream.

An apparatus for producing fine particles, comprising:

• an air classifier, and
• at least one of grinding mills, collision mills, and air conveyors,
• wherein the air classifier comprises a dispersion room into which a mixture of primary air and the powder is introduced, and a classification room which is equipped with a center core at the upper side, a separator core at the lower side, and a secondary air inlet at the side wall,
• the classification room is disposed below the dispersion room, and the mixture of the primary air and the powder flows from the dispersion room into the classification room, and
• a flow stabilizer is arranged at a central suction of the separator core to control swirl stream generated within the classification room so as to centrifuge the powder into coarse particles and fine particles by action of the swirl stream.

A method for producing fine particles,

• wherein the fine particles are produced by means of an apparatus which comprises an air classifier, and at least one of grinding mills, collision mills, and air conveyors,
• the air classifier comprises a dispersion room into which a mixture of primary air and the powder is introduced, and a classification room which is equipped with a center core at the upper side, a separator core at the lower side, and a secondary air inlet at the side wall,
• the classification room is disposed below the dispersion room, and the mixture of the primary air and the powder flows from the dispersion room into the classification room, and
• a flow stabilizer is arranged at a central suction of the separator core to control swirl stream generated within the classification room so as to centrifuge the powder into coarse particles and fine particles by action of the swirl stream.