This is a tutorial on how to cast low-temp metal alloys using 3d printed molds. The process involves common tools and supplies - a 3d printer, silicone rubber, a hot plate, stovetop casting alloy, and a dollar store skillet. I used this process to generate locking plates for my Flat-Pack camera arm, but the same method can be used to cast more than metals - anything from chocolate to plastic, with the accuracy only limited to the precision and resolution of your printer.
Metallic 3D Printing Filament
SLM Solutions 3D-prints metal parts with a size of up to 3.0 x 1.2 x 1.2 m - SPAENER
Introduction, Metal Parts from 3D Prints
Custom Metal 3D Printing Service - Online Metal Parts and Quote
Post-Processing of AM and 3D-Printed Parts - Wohlers Associates
Introduction Metal Parts From 3D Prints Adafruit Learning, 57% OFF
Introduction Metal Parts From 3D Prints Adafruit Learning, 57% OFF
How does Metal 3D printing work?
Introduction to Metal Casting and Ways to Combine 3D Printing With Casting Workflows