Arnel modern chess set4/2/2024 ![]() ![]() We did a few sets and played with them for a while to see how they felt. After you break the molds and release the aluminum pieces, there are still a few finishing processes that you have to do like sanding, polishing, painting, etc. The final step in this manufacturing process involves breaking the ceramic mold from the investment casting and cutting the parts from the tree. After pouring of the molten metal into the mold, the casting is allowed to set as the solidification process takes place. This causes the wax to flow out of the mold, leaving the cavity for the metal casting. Then the hardened ceramic mold is turned upside down and heated to a temperature of around 200F-375F (90C-175C). The tree is then repeatedly dipped into the slurry to increase the thickness of the ceramic coat. ![]() A ceramic layer is obtained over the surface of the tree. The wax tree is then dipped in a refractory slurry whose composition includes extremely fine grained silica, water and binders. After that we made wax branches and trees with lots of pieces. Investment casting is a manufacturing process that allows the casting of extremely complex parts, with good surface finish. Normally wax replicas are made with injection molding, but since we were just prototyping, I used pots to melt the wax and poured them into silicone molds. ![]()
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