Extruder head, extruder system and use of an extruder head and / or an extruder system

摘要

Extruder head (1) for the extrusion of a strand (ST) of building material (BS) for 3D printing of a building part (BWT), the extruder head (1) having: - an extruder nozzle (5), the extruder nozzle (5) being a Has exit opening (2) for the exit of the strand (ST) of building material (BS) from the extruder head (1) in an exit direction (x), - at least one default element (7a, 7b, 8a, 8b, 30a, 30b), wherein the at least one specification element (7a, 7b, 8a, 8b, 30a, 30b) for the variably adjustable specification of at least one part (4A, 41) of a strand cross-section (4) of the emerging strand (ST) of building material (BS) is designed to be variably adjustable, and- at least one setting device (213, 217a, 217b, 218a, 218b), wherein the at least one setting device (213, 217a, 217b, 218a, 218b) for the variable setting of the at least one default element (7a, 7b, 8a, 8b, 30a , 30b) is designed and designed and arranged such that the extruder head (1) is in one of the exit direction (x) different first direction of extent (-z) below the exit opening (2) at maximum opening height (HO) extends maximally by the maximum opening height (HO) and / or in at least one second direction of extent different from the exit direction (x) (- y, y) to the side of the outlet opening (2) at maximum opening width (BO) extends by a maximum of the maximum opening width (BO).