Patent ID: 9278536
Filing Date: 2016-03-08
CPC Classification: B41J

Claim Text:
1. A printing head module, configured to dispense a modeling material layer by layer to form a three-dimensional object on a base, the printing head module comprising: a bracket comprising a plurality of through holes; a plurality of printing heads parallelly aligned with each other and disposed in the through holes respectively, each of the printing heads comprising a nozzle for extruding the modeling material; a pivot shaft connected to the bracket to rotate one of the printing heads to a target position for dispensing the modeling material, the through holes disposed around the pivot shaft, such that the printing heads disposed therein surrounds the pivot shaft; a wiper unit comprising: a wiper opener disposed at the target position to interfere with the wiper rotated to the target position, so as to drive the corresponding wiper to rotate to the opening position for the corresponding printing head to extrude the modeling material through the opening, the wiper opener releasing the interference when the corresponding wiper passes the target position, so the corresponding wiper rotate back to the blocking position to wipe off the residual modeling material from the tip of the nozzle.