US 12,138,851 B2
Solid freeform fabrication of shelled objects
Daniel Dikovsky, Ariel (IL); Avraham Levy, Petach-Tikva (IL); and Eduardo Napadensky, Natania (IL)
Assigned to Stratasys Ltd., Rehovot (IL)
Filed by Stratasys Ltd., Rehovot (IL)
Filed on Dec. 13, 2021, as Appl. No. 17/548,649.
Application 14/985,465 is a division of application No. 13/642,903, granted, now 9,227,365, issued on Jan. 5, 2016, previously published as PCT/IB2011/051750, filed on Apr. 21, 2011.
Application 17/548,649 is a continuation of application No. 14/985,465, filed on Dec. 31, 2015, granted, now 11,198,245.
Claims priority of provisional application 61/447,743, filed on Mar. 1, 2011.
Claims priority of provisional application 61/327,692, filed on Apr. 25, 2010.
Claims priority of provisional application 61/327,693, filed on Apr. 25, 2010.
Prior Publication US 2022/0097291 A1, Mar. 31, 2022
Int. Cl. B29C 64/112 (2017.01); B29C 64/135 (2017.01); B29C 64/393 (2017.01); B33Y 10/00 (2015.01); B33Y 50/02 (2015.01)
CPC B29C 64/112 (2017.08) [B29C 64/135 (2017.08); B29C 64/393 (2017.08); B29K 2995/0015 (2013.01); B33Y 10/00 (2014.12); B33Y 50/02 (2014.12); Y10T 428/23 (2015.01)] 20 Claims
OG exemplary drawing
 
1. A layered polymeric structure, comprising a layered core at least partially surrounded by two or more layered shells, said layered core, and each of said two or more layered shells being fabricated by three-dimensional inkjet printing, wherein said two or more layered shells comprise an intermediate layered shell and an outer layered shell, and wherein said layered core is made of a first modeling material, said outer layered shell is made of a second modeling material, and said intermediate layered shell comprises both said first modeling material and said second modeling material;
wherein said layered core is characterized by a lower impact resistance value and higher HDT value relative to at least one of said two or more layered shells.
 
18. A layered polymeric structure, comprising a layered core at least partially surrounded by two or more layered shells, said layered core, and each of said two or more layered shells being fabricated by three-dimensional inkjet printing;
wherein said two or more layered shells comprise an intermediate layered shell and an outer layered shell;
wherein said layered core is made of a first modeling material, said outer layered shell is made of a second modeling material, and said intermediate layered shell comprises both said first modeling material and said second modeling material; and
wherein the layered polymeric structure is characterized by impact resistance of at least 30 J/m, and wherein said layered core is characterized by an elastic modulus above 1 GPa and heat deflection temperature (HDT) above room temperature.
 
19. A layered polymeric structure, comprising a layered core characterized by elastic modulus of about 3.5 GPa and being at least partially surrounded by: a first layered shell characterized by elastic modulus of about 0.6 GPa, a second layered shell characterized by elastic modulus of about 1.8 GPa, and a third layered shell characterized by elastic modulus of about 0.2 GPa;
wherein said layered core, and each of said first, second, and third layered shells are fabricated by three-dimensional inkjet printing; and
wherein said layered core is made of a first modeling material, said third layered shell is made of a second modeling material, and said first and said second layered shells comprise both said first modeling material and said second modeling material.