Cleaning and finishing a ceramic mold

Details Cleaning and finishing a ceramic mold Cleaning and finishing a ceramic mold

B - Operations, Transporting

22

C

B22C 9/18 (2006.01) B08B 7/00 (2006.01) B08B 9/08 (2006.01) B22C 23/02 (2006.01)

Patent

CA 2290708

A technique for removing loose powder from the interior surfaces of a ceramic mold made using layer manufacturing processes, such as three-dimensional printing processes. The interior of a mold can be filled with water which is boiled and the particles are entrained in the flow caused by the boiling liquid. Alternatively, fine particles are introduced into the mold and agitated in the mold to dislodge the particles and the powder so that they can be poured out of the mold. Such technique tends also to remove the surface finish of the mold. Any of the particles which remain can be dissolved in a liquid and removed in the liquid from the mold. Further, the surface finish of the mold 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.

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