Heat treatment apparatus and method for manufacturing toner
First Claim
1. A heat treatment apparatus for heat-treating powder particles containing a thermoplastic binder resin, comprising:
- a raw-material supply unit for supplying the powder particles into the apparatus;
a hot-air supply unit for heat-treating the supplied powder particles; and
a discharge portion for discharging the heat-treated powder particles, the discharge portion being positioned in a downstream side of the raw-material supply unit and the hot-air supply unit,wherein;
the raw-material supply unit is circularly provided so as to surround the hot-air supply unit at such a position as to be adjacent to an outer peripheral face of the hot-air supply unit, or at such a position as to be separated from the outer peripheral face in the horizontal direction,from an outlet of the hot-air supply unit, hot air is supplied toward the powder particles which are supplied from the raw-material supply unit,the hot-air supply unit has a first nozzle and a second nozzle which spread in a radial direction to the downstream side from an upstream side in a hot-air supply direction,the second nozzle is arranged in the inside of the first nozzle, andthe hot air passes through a space between the inside of the first nozzle and the outside of the second nozzle,and wherein;
the heat treatment apparatus further comprises an air-flow adjustment unit for rotating the supplied hot air spirally along an inner wall face of the apparatus, the air-flow adjustment unit being provided in an outlet portion of the hot-air supply unit.
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Accused Products
Abstract
An object of the present invention is to suppress the increase of coarse particles due to the fusion of powder particles and reduce a ratio of particles that have been excessively spheroidized, when the powder particles are heat-treated. A heat treatment apparatus including a raw-material supply unit, a hot-air supply unit for heat-treating a raw material and a discharge portion for discharging the heat-treated powder particles, and supplying hot air toward a raw material to be supplied from the raw-material supply unit, wherein the hot-air supply unit has a first nozzle and a second nozzle which spread in the radial direction downward from an upstream side in a hot-air supply direction, the second nozzle is arranged in the inside of the first nozzle, the hot air passes through a space between the first nozzle and the second nozzle, and an air-flow adjustment unit section for rotating the supplied hot air spirally along an inner wall face of the apparatus is provided in an outlet portion of the hot-air supply unit.
46 Citations
7 Claims
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1. A heat treatment apparatus for heat-treating powder particles containing a thermoplastic binder resin, comprising:
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a raw-material supply unit for supplying the powder particles into the apparatus; a hot-air supply unit for heat-treating the supplied powder particles; and a discharge portion for discharging the heat-treated powder particles, the discharge portion being positioned in a downstream side of the raw-material supply unit and the hot-air supply unit, wherein;
the raw-material supply unit is circularly provided so as to surround the hot-air supply unit at such a position as to be adjacent to an outer peripheral face of the hot-air supply unit, or at such a position as to be separated from the outer peripheral face in the horizontal direction,from an outlet of the hot-air supply unit, hot air is supplied toward the powder particles which are supplied from the raw-material supply unit, the hot-air supply unit has a first nozzle and a second nozzle which spread in a radial direction to the downstream side from an upstream side in a hot-air supply direction, the second nozzle is arranged in the inside of the first nozzle, and the hot air passes through a space between the inside of the first nozzle and the outside of the second nozzle, and wherein; the heat treatment apparatus further comprises an air-flow adjustment unit for rotating the supplied hot air spirally along an inner wall face of the apparatus, the air-flow adjustment unit being provided in an outlet portion of the hot-air supply unit. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification