US 12,303,969 B1
Mold compositions for additive casting of metal objects
Roi Levi, Rehovot (IL); Orel Birodker, Gan Yavne (IL); Valeriya Frid Zaid, Tel Aviv-Jaffa (IL); Hana Arini Yadid, Gedera (IL); Moshe Frenkel, Jerusalem (IL); and Hani Farran, Ramat Gan (IL)
Assigned to MAGNUS METAL LTD, Tzora (IL)
Filed by Magnus Metal Ltd, Revadim (IL)
Filed on May 8, 2024, as Appl. No. 18/658,391.
Int. Cl. B22C 1/02 (2006.01); B22C 1/18 (2006.01); B33Y 70/10 (2020.01); C04B 35/488 (2006.01); C04B 35/63 (2006.01)
CPC B22C 1/02 (2013.01) [B22C 1/188 (2013.01); B33Y 70/10 (2020.01); C04B 35/4885 (2013.01); C04B 35/6309 (2013.01); C04B 35/6316 (2013.01); C04B 2235/3217 (2013.01); C04B 2235/3244 (2013.01); C04B 2235/3427 (2013.01); C04B 2235/422 (2013.01); C04B 2235/447 (2013.01); C04B 2235/528 (2013.01); C04B 2235/5427 (2013.01); C04B 2235/5436 (2013.01); C04B 2235/5472 (2013.01); C04B 2235/6026 (2013.01); C04B 2235/9676 (2013.01)] 20 Claims
 
1. A paste composition for manufacturing of a mold for additive casting of a metal object, in a process of subsequent formation of production layers, each production layer comprising at least one mold region and at least one metal object region, the mold region comprising at least one paste composition, the paste composition comprising:
between about 65 wt % and about 75 wt % of at least one ceramic material in particulate form;
between about 3 wt % and about 8 wt % of at least one inorganic binder, wherein said at least one inorganic binder is different from said at least one ceramic material;
between about 4 wt % and about 14 wt % of at least one porosity controlling additive;
between about 0.05 wt % and about 3 wt % of at least one of an energy absorbing additive and an energy conductive additive, wherein said energy absorbing additive is different from said at least one ceramic additive and said energy conductive additive is different from said at least one ceramic material, and wherein said energy absorbing additive is different from said energy conductive additive; and
between about 10 wt % and about 20 wt % of at least one carrier liquid;
the paste composition having a mass loss of at least about 10 wt % out of the total mass of the paste composition when heated to about 220° C. for a period of time of no more than about 30 minutes;
wherein said at least one ceramic material comprises a mixture of at least one first ceramic material having a particle size of between about 50 μm and about 300 μm and at least one second ceramic material having a particle size of between about 1 μm and about 15 μm.