3D PRINTING WITH REINFORCING FIBERS Russian patent published in 2022 - IPC B29C64/118 B29C64/209 B29C70/16 B29C70/38 B29C64/295 B33Y10/00 B33Y30/00 B33Y70/00 

FIELD: parts additive manufacturing.

SUBSTANCE: invention relates to the additive manufacturing of a part, and more particularly to a method and a 3D printer for the additive production of a fiber reinforced part. The 3D printer (300) comprises: an assembly platform (100) for supporting a workpiece (700) and a print head (500) including or connected to a source of fiber composite filament loaded with a fiber composite filament (800) pre-impregnated with thermoplastic, comprising including one or more inelastic longitudinally oriented strands of fibers extending within the thermoplastic matrix material of the yarn (800). At the same time, the print head (500) includes: the first heating zone (1) between the source of the fibrous composite thread and the heated nozzle (2), while the first heating zone (1) is configured to be heated by the first heater above the melting temperature of the thermoplastic matrix material for pre-heating of the pre-impregnated thread (800) of the fibrous composite, the consolidating element (9) located after the heated nozzle (2), a yarn transfer device (4) for transferring a yarn (800) of a fibrous composite, including one or more non-elastic longitudinally oriented strands of fibers, through the first heating zone (1) into a heated nozzle (2) at a selected feed rate, a cold zone (6) supply between the thread transfer device (4) and the first heating zone (1) to maintain the temperature of the fiber composite thread (800) below the melting temperature of the matrix material, the non-heated zone (7) of the thermal break between the first heating zone (1) and the heated nozzle (2) to create a temperature gap between the first heating zone (1) and the heated nozzle (2). In addition, the three-dimensional printer (300) contains a plurality of actuators for moving at least the print head (500), including the consolidating element (9), relative to the assembly platform (100) in three degrees of freedom.

EFFECT: providing better technology for 3D printing with continuous reinforcement.

16 cl, 13 dwg, 3 ex