US 11,890,812 B1
3D printing method and 3D printing formed body
Zhi-Min Shao, Xiamen (CN); Sheng-Fa Chen, Nan'an (CN); and Feng-Ming Chen, Xiamen (CN)
Assigned to AMPLIFI TECH (XIAMEN) LIMITED, Fujian (CN)
Filed by Amplifi Tech (Xiamen) Limited, Fujian (CN)
Filed on Dec. 1, 2022, as Appl. No. 18/072,910.
Int. Cl. B29C 64/379 (2017.01); B29C 64/264 (2017.01); B29C 55/00 (2006.01); B33Y 70/00 (2020.01); B33Y 10/00 (2015.01); B33Y 40/00 (2020.01)
CPC B29C 64/379 (2017.08) [B29C 55/005 (2013.01); B29C 64/264 (2017.08); B33Y 10/00 (2014.12); B33Y 40/00 (2014.12); B33Y 70/00 (2014.12)] 19 Claims
OG exemplary drawing
 
1. A three-dimensional (3D) printing method, comprising:
a resin providing step of providing dual cure resin;
a light curing step of irradiating the dual cure resin by an ultraviolet (UV) light to perform 3D printing, so as to form an intermediate body having a predetermined lattice shape;
a stretching step of applying a stress on the intermediate body in a stretching direction according to a stretching ratio of predetermined dimensions so as to stretch and form a stretched body; and
a thermal curing step of heating the stretched body to perform thermal curing and shaping so as to form a 3D printing formed body,
wherein, during the light curing step, a size of the intermediate body in a non-stretching direction is correspondingly pre-compensated based on the stretching ratio.