Test firing a printed (ABS-like Objet photopolymer) AR receiver in 5.7x28FN. Lower max PSI than .223, but broke the buffer tube ring within six rounds. We do not recommend printing a lower receiver for a rifle setup until the file can be further reinforced.
They’re real. I saw a demo of one replicating a fancy perfume bottle with complex curves and such. The replica was to be used as a template for a yet to be build injection mold.
Not hard to understand how a laser or plasma cutter can recreate almost anything from a block of stock material. Just cut along the X, Y, Z axis. What has me scratching my head is how interior cavities can be hollowed out without damaging the exterior. I can only assume partial subassemblies would need to be create and joined after fabrication. Either that or start with die cast stock - but that would defeat the whole point of this technology.
Ah, what do I care? I’m going deck so I’ll just leave it to the engineers to figure out.
They are getting pretty common these days. My brother built one on his time off this year. They don’t cut anything they print using plastic instead of ink. Think like a plasma cutter or cnc routing only opposite. You draw it in cad and the computer tells the device where to put material instead of cutting it out. The plastic is extruded in a hot liquid form and cools quikly. When it finishes a pass the print head moves up a little and makes another pass applying plastic until you have an object.
A guy I used to know works for a company that does it. They prototype new inventions and fabricate complex parts. They have, I hear, a metallic polymer that bonds/burns off in a kiln leaving a metal object.
Can you imagine having that onboard? With a set of specs you could print and fire a new bendix arm for a starter for instance instead if ordering one, waiting a week for the wrong part or having to replace the whole thing. Grainger would protest!