A CAD iteration of a finished part, prior to 3D printing of a prototype or pattern.
Foundries make metal parts: they use sand and ceramic materials to make molds and cores to make those metal parts. Sand molds and cores are made by a variety of processes, from green sand to no-bake and beyond. Cores are made through a variety of processes, too, some with tooling and some by hand. Pretty much all the processes require some form of a solid pattern. As time goes on, the tools that are used and the sophistication of the media continue to improve. ...
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