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In 3D printing of PLA molds for slip casting (especially case molds from which working molds are directly made), warping of the print is a constant problem. During printing, corners can pull up and away from the print bed (often after hours of printing). This drawing shows how slotted side rails enable sliding the mold in (this is the base of a bottle shape). The slots hold it straight. These slots also prevent the plaster from migrating around the edge and getting underneath. And they lift the print off the table enough to permit clip inserts in the holes (they hold embeds for natches in place). Notice that I have made a 1.6mm slot for a 1.2 mm mold - this was needed because the slicer has to insert printed support in the slot, this creates imprecise geometry and issues with assembly. The extra allowance assures trouble-free use (you may find it necessary to adjust this a little.
Glossary |
Side Rails
Side rails are the containment used when pouring plaster molds. We 3D-print these to custom fit each mold. |
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