Patent attributes
Provided is an apparatus for feeding/discharging a filament for a 3D printer, including a filament supply part which winds the wire-shaped filament and supplies the wound filament; a filament output part which outputs a three-dimensional printed matter by melting and discharging the filament supplied from the filament supply part; and a driving part which supplies the filament from the filament supply part to the filament output part, and discharges the filament from the filament output part toward the filament supply part, wherein the driving part includes a driving motor which is provided at the filament output part to generate a driving force and thus to adapt the filament to be conveyed in a normal direction or a reverse direction; a driving roller which is provided at the filament output part to receive the driving force of the driving motor and to convey the filament in the normal direction or the reverse direction; a conveying roller which is provided at the filament supply part to receive the driving force of the driving motor and to convey the filament in the normal direction or the reverse direction; and transmission gears which are provided between the driving motor and the driving roller and between the driving motor and the conveying roller to transmit the driving force of the driving motor to the driving roller and the conveying roller. Therefore, the filament can be accurately supplied to the extruder, and the fixed filament can be easily discharged from the extruder.
