A 3D PRINTER HEAD FOR USE IN A 3D PRINTER, A 3D PRINTER HAVING SUCH A 3D PRINTER HEAD, A METHOD FOR OPERATING SUCH A 3D PRINTER, AND PRINTED PRODUCT PRODUCED WITH SUCH A 3D PRINTER

摘要

A 3D printhead comprises a chamber which is designed to receive liquid or solid printing material through an inlet, wherein the chamber has an outlet opening on one surface, and the chamber is assigned a spiral feed screw which is designed to feed printing material that has entered the chamber through the inlet to the outlet opening, in that the spiral feed screw or the chamber can be coupled to a drive which is designed to rotate the spiral feed screw or the chamber in such a way that the spiral feed screw can rotate at a distance from the surface of the chamber and in relation thereto, wherein the spiral feed screw has at least one feed path which is designed to feed printing material between a radially outer lying inlet region and a radially inner lying outlet region towards the latter, and has at least one discharge path which is arranged and designed to discharge printing material containing gas at least from a portion of a radially outer peripheral zone of the outlet region.