METHOD FOR STRENGTHENING 3D-PRINTED STRUCTURES Russian patent published in 2021 - IPC B29C64/00 B33Y10/00 B33Y30/00 

FIELD: 3D printing.

SUBSTANCE: invention relates to the field of post-processing in 3D printing by FDM (fused deposition modeling - modeling by layer-by-layer deposition) and makes it possible to increase the strength of printed structures and reduce the anisotropy of mechanical properties. A method for manufacturing 3D-printed structures with subsequent vacuum impregnation is described, which consists in forming the product by three-dimensional layer-by-layer printing, in which for the manufacture of each layer of the part, the thermoplastic material is heated in the print head to a semi-liquid state and squeezed out in the form of a thread through a nozzle with a small diameter hole, deposited on the surface of the desktop for the first layer or on the previous layer for subsequent layers until the product is completely built, where, after the formation is completed, the product is placed in a vacuum chamber in an epoxy compound based on ED-20 resin, the air is pumped out of the chamber, kept until the air bubble separation process is completely over, then the air is returned to the chamber, as a result of which the process of impregnating the part with the compound is completed.

EFFECT: increased strength of 3D-printed parts.

1 cl, 1 dwg, 2 tbl