Check out this inspiring aluminum casting demo from 3DTopo that shows the practical process of using PLA for lost-wax casting methods, that they have dubbed “lost PLA casting”:
This page describes my first successful attempt casting aluminum parts directly from 3D printed PLA parts. The process is practically identical to lost wax, but instead of burning out the wax, I burned out the PLA plastic (which is a bio-plastic).
I needed some aluminum parts to mount my focusing lens for my 150W CO2 cutting laser. The parts needed to be adjustable, and I needed it to mount to some scrap extruded aluminum I had laying around.
I am absolutely thrilled about the possibility of going from concept -> design -> 3D Print -> finished metal casting all in the course of 1-day.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
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We recently went down that same path and made a list PLA Yoda head. You can check it out here.