US 12,070,897 B2
Additive manufacturing employing polyimide-containing formulations
Mariana Pokrass, Rehovot (IL); Omer Sinwani, Petach-Tikva (IL); Shai Sultan, Moshav Ganei Tal (IL); Lev Kuno, Tzur-Hadassah (IL); and Gil Shelef, Kibbutz Negba (IL)
Assigned to Stratasys Ltd., Rehovot (IL)
Appl. No. 16/958,713
Filed by Stratasys Ltd., Rehovot (IL)
PCT Filed Dec. 27, 2018, PCT No. PCT/IL2018/051401
§ 371(c)(1), (2) Date Jun. 28, 2020,
PCT Pub. No. WO2019/130310, PCT Pub. Date Jul. 4, 2019.
Claims priority of provisional application 62/610,983, filed on Dec. 28, 2017.
Prior Publication US 2021/0008793 A1, Jan. 14, 2021
Int. Cl. B29C 64/129 (2017.01); B29C 64/209 (2017.01); B29C 64/277 (2017.01); B29C 64/393 (2017.01); B29K 79/00 (2006.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01); B33Y 50/02 (2015.01); C08G 73/12 (2006.01)
CPC B29C 64/129 (2017.08) [B29C 64/209 (2017.08); B29C 64/277 (2017.08); B29C 64/393 (2017.08); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); B33Y 50/02 (2014.12); C08G 73/128 (2013.01); B29K 2079/08 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A method of additive manufacturing of a three-dimensional object, the method comprising:
dispensing from a first array of nozzles a liquid modeling material formulation containing a polyimide precursor to form a layer in a configured pattern corresponding to a shape of a slice of the object, wherein said polyimide precursor is bismaleimide and said liquid modeling material formulation is devoid of a bis-allyl-nadi-imide compound;
applying to said layer ultraviolet radiation and infrared radiation from two different radiation sources; and
repeating said dispensing and said application of radiation to form a plurality of layers in configured patterns corresponding to shapes of other slices of the object;
wherein for at least one layer, said applying said infrared radiation is by performing a plurality of scans of said infrared radiation over said layer after said formation of said layer and before dispensing a subsequent layer.