[sdiy] I can print knobs!

[AlanP]

On 30/04/2017 10:15 a.m., rsdio at audiobanshee.com wrote:
> Another idea used by a local Seattle 3D-printing shop is to print one mold that is the inverse of the desired item, and then mass produce by pouring into the mold. This allows ceramics (with powder-printed molds) or other materials. It's also much faster and more dependable than 3D printing, where a single glitch in the middle of a printing session can ruin an entire part.

Could they print a two part re-usable mold that could take molten 
aluminium? I'd love to be able to cast knobs, in the same rough way as 
people cast lead bullets and musket-balls.

-- 
Alan Podjursky
"When in doubt, use brute force." -- Ken Thompson