| 摘要 |
The present invention relates to a head assembly for a three-dimensional printer. The head assembly comprises: a feeding unit (20) for supplying a filament, a molding material, by including a feeding body (210), a roller bracket (220) having a feeding roller installed thereto and elastically rotated by a coil spring (250), and a feeding gear (240) for transferring the filament with a driving force of a step motor (241); a melting spraying part (30) for melding the filament to be sprayed by including a nozzle (310) into which the filament supplied from the feeding unit (20) is injected, and a hitting means (320) for melting the filament injected into the nozzle (310); and a cooling unit (40) for cooling a melting solution (51) sprayed from the melting spraying unit (30) by including a cooling chamber (410) having a cooling fan (413) installed therein to produce a cooling wind, and a wind guide (420) for inducing and discharging the cooling wind to a wind outlet (421) at the center thereof. Therefore, the molding speed of the three-dimensional printer is improved by stably and rapidly cooling a filament meting solution (51) sprayed on a bed (10). |
