Powder recycling system

摘要

A powder recycling system includes a powder feeder, a remaining powder collector, a bridge breaker, a block powder filter, a cyclone separator, a particulate filter cleaner, an air pressure generation device and an electrostatic precipitator. The powder feeder provides a construction powder to a construction platform. The remaining powder collector for collects the remaining powder. The cyclone separator is used to separate the large-size powdery particles and the small-size powdery particles of the remaining powder from each other through a rotating gaseous stream. The large-size powdery particles fall down to the powder feeder due to gravity, and the small-size powdery particles of the remaining powder is removed from the rotating gaseous stream and transmitted to the particulate filter cleaner. After the small-size powdery particles of the remaining powder are filtered by the particulate filter cleaner, the suspended small-size powdery particles are transmitted to the electrostatic precipitator.

主权项

1. A powder recycling system for recycling remaining powder from a construction chamber of a three-dimensional object forming apparatus, the powder recycling system comprising:
a powder feeder comprising a powder container for accommodating a construction powder, wherein the powder feeder comprises a first inlet, a second inlet and a powder exhaust port, wherein the construction powder falls down to the construction chamber through the powder exhaust port, so that a constructing process is performed within the construction chamber; a remaining powder collector comprising a guiding tank, wherein the guiding tank surrounds the construction chamber for collecting the remaining powder from the construction chamber, wherein a bottom of the guiding tank has a collector outlet; a cyclone separator comprising a first cyclone unit and a second cyclone unit, wherein the first cyclone unit comprises a first cyclone inlet, a first cyclone outlet and a first powder falling port, and the second cyclone unit comprises a second cyclone inlet, a second cyclone outlet and a second powder falling port, wherein the first cyclone inlet is in communication with the collector outlet of the remaining powder collector through a first duct, the first cyclone outlet is in communication with the second cyclone inlet through a second duct, the first powder falling port is in communication with the first inlet of the powder feeder, and the second powder falling port is in communication with the second inlet of the powder feeder, wherein the remaining powder from the remaining powder collector is separated into large-size powdery particles and small-size powdery particles by the cyclone separator, the large-size powdery particles fall down to the powder feeder to be recycled as the construction powder, and the small-size powdery particles are outputted from the second cyclone outlet; a particulate filter cleaner comprising a powder collecting tank, a covering member, a filter net, a cleaner inlet and an airflow channel, wherein the filter net is arranged between the covering member and the powder collecting tank, an upper portion of the powder collecting tank has an airflow conducting space, and the cleaner inlet is in communication with the second cyclone outlet of the cyclone separator through a third duct, wherein when a negative pressure airflow is introduced into the airflow channel, the small-size powdery particles of the remaining powder are transmitted from the second cyclone unit to the airflow conducting space through the cleaner inlet and filtered by the filter net, so that portions of the small-size powdery particles are suspended; an air pressure generation device providing the negative pressure airflow, and comprising a first airflow port and a second airflow port, wherein the first airflow port is in communication with the airflow channel of the particulate filter cleaner through a fourth duct; and an electrostatic precipitator comprising a connecting port and a dust collection plate, wherein the connecting port is in communication with the second airflow port of the air pressure generation device through a fifth duct, wherein the suspended small-size powdery particles from the particulate filter cleaner are introduced into the electrostatic precipitator through the connecting port and adsorbed by electrostatic charges on the dust collection plate.