B - Operations – Transporting – 08 – B
Patent
B - Operations, Transporting
08
B
B08B 3/12 (2006.01) B08B 3/10 (2006.01) B08B 5/04 (2006.01) B08B 7/00 (2006.01) B08B 9/00 (2006.01) B22C 9/18 (2006.01) B22C 23/02 (2006.01) B22F 3/00 (2006.01) B24B 1/04 (2006.01) B24C 1/00 (2006.01) B29C 33/56 (2006.01)
Patent
CA 2146366
A technique for removing loose powder (31) from the interior surfaces of a ceramic mold (17) made using layer manufacturing processes, such as three-dimensional printing processes. The interior of a mold (17) can be filled with water (21) which is boiled and the particles am entrained in the How caused by the boiling liquid. Alternatively, fine particles (51) are introduced into die mold (47) and agitated in the mold (47) to dislodge the particles (51) and the powder so that they can be poured out of the mold (47). Such technique tends also to remove the surface finish of the mold (47). Any of die particles (51) which remain can be dissolved in a liquid and removed in the liquid from the mold (47). Further, the surface finish of the mold (47) can be improved by casting a slip of fine particles on to the surface to form a generally level, and preferably non-conformal, coating on the surfaces.
Bredt James F.
Cima Michael J.
Khanuja Satbir
Sachs Emanuel M.
Massachusetts Institute Of Technology
Smart & Biggar
LandOfFree
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