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This 3D printed shell encloses an entire two-piece mold for v 5.0 of our Medalta Potteries ball pitcher mold project - all that is needed is to fill it with plaster and peel off the PLA casing after it sets. We are still in the development stages so the fact that this will only produce one mold is fine. The membrane across the center is where the two mold halves mate (it also holds the inner model in place). The membrane has holes where natch-socket pairs can be mated for embedding into the plaster mold. The spare (shown lower right) will be rotated 90 degrees, it has a slot that fits snuggly over the membrane to hold it in place. We designed this to print a minimum of support. The handle is being done separately.
This is for v.5 of our 3D mold-making (and discovery) project for the ball pitcher. The process to make the 3D drawing is quite simple: Cut it out of the model (top left), draw and extrude side walls (top right, notice it does not show the holes for natch embeds, they were added later) and slice off and remove the pointy parts. Bottom: A ready-to-use mold). Cutting the ends flush with the mold will enable just attaching it using some casting slip as the glue. It has become evident that the handle should be cast separately. This greatly simplifies mold making, extracting of the piece and produces a more professional-looking product (without holes inside where the handles join).
Projects |
Medalta Ball Pitcher Slip Casting Mold via 3D Printing
A project to make a reproduction of a Medalta Potteries piece that was done during the 1940s. This is the smallest of the three sizes they made. |
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