Printing head module

摘要

A printing head module includes a bracket, a plurality of printing heads, a pivot shaft, a wiper unit, and a control unit. The bracket includes a plurality of through holes. The printing heads are parallelly aligned with each other, each of the printing heads a nozzle for extruding the modeling material. The pivot shaft connected to the bracket is adapted to rotate the printing heads to a target position. The wiper unit includes a holder, a plurality of wipers, and a wiper opener. The holder is connected to the pivot shaft to be rotated with the bracket and the printing heads. The wipers rotatably connected to the holder and disposed correspondingly to the openings. The wiper opener is 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.

主权项

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 holder connected to the pivot shaft to be rotated with the bracket and the printing heads, the holder comprising a plurality of openings respectively located beneath and corresponding to the nozzles; anda plurality of wipers rotatably connected to the holder and disposed correspondingly to the openings, each of the wipers adapted to rotate between an open position for exposing the corresponding opening and a block position for covering the corresponding opening; and 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.