US 12,496,770 B2
Digitally-controlled three-dimensional printing of polymerizable materials
Eynat Matzner, Adi (IL); Ira Yudovin-Farber, Rehovot (IL); Shai Hirsch, Rehovot (IL); and Lev Kuno, Tzur-Hadassah (IL)
Assigned to Stratasys Ltd., Rehovot (IL)
Filed by Stratasys Ltd., Rehovot (IL)
Filed on Aug. 1, 2022, as Appl. No. 17/878,123.
Application 17/878,123 is a continuation of application No. 15/549,191, abandoned, previously published as PCT/IL2016/050135, filed on Feb. 5, 2016.
Claims priority of provisional application 62/112,277, filed on Feb. 5, 2015.
Prior Publication US 2022/0379548 A1, Dec. 1, 2022
Int. Cl. B29C 64/112 (2017.01); B29C 64/393 (2017.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01); B33Y 50/02 (2015.01); B33Y 70/00 (2020.01); B41J 2/01 (2006.01); C09D 11/101 (2014.01); C09D 11/30 (2014.01)
CPC B29C 64/112 (2017.08) [B29C 64/393 (2017.08); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); B33Y 50/02 (2014.12); B33Y 70/00 (2014.12); B41J 2/01 (2013.01); C09D 11/101 (2013.01); C09D 11/30 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method of fabricating an object, the method comprising:
receiving three-dimensional printing data corresponding to the shape of the object;
selecting a ratio between a first composition and a second composition, wherein said first composition comprises a first material and said second composition comprises a second material, said first and second materials undergoing a chemical reaction with one another so as to form a building material when exposed to a curing energy;
dispensing droplets of said first and said second compositions in layers, on a receiving medium, using at least two different inkjet printing heads, according to said printing data;
wherein for at least one region of the object, said dispensing of said droplets is selected to form voxel blocks, wherein, for each block, a ratio between a number of voxels of said first composition in said block and a number of voxels of said second composition in said block corresponds to said selected ratio;
and wherein said first material is a first curable material and is a monomer polymerizable by an anionic ring opening polymerization, and wherein said second material is a second curable material which is a monomer polymerizable by photo-induced cationic polymerization and chemically reacts with said first curable material to form a co-polymer which forms a part of said building material, wherein a polymerized material formed of the first curable material and a polymerized material formed of the second curable material chemically interact with one another by cross-linking,
wherein the method further comprises exposing the dispensed layers to said curing energy, said curing energy comprising thermal energy and UV irradiation.