3D Printing Plastic in Space – Made in Space’s Archinaut Breakthrough

In our latest discussion on additive manufacturing for space, we highlight Made in Space’s pioneering Archinaut system. While the International Space Station already employs an on‑board SLS printer, Archinaut takes it a step further by enabling astronauts to 3D print plastic parts directly in the vacuum of space. This advancement unlocks a new level of flexibility for exterior repairs—something earlier technologies could not support due to vacuum‑unsuitable materials.

Archinaut combines Made in Space’s space‑grade plastic, ULTEM, with robotic arms that can sculpt complex structures in orbit. The company showcased a live demo at NASA Ames Research Center’s Engineering Evaluation Laboratory, where a printed part was fabricated inside a thermal vacuum chamber that faithfully reproduced the harsh conditions of space.

The implications are far‑reaching: from custom satellites and telescopes to everyday tools, parts can be manufactured on demand without the constraints of Earth‑based production. This dramatically cuts the need to launch bulky spare parts, and with future material innovations, the technology could even print small habitats. Made in Space is already developing a metal additive manufacturing counterpart to complement its plastic solution.

Adopting Archinaut will involve a learning curve as engineers refine new design tools tailored to the space environment. However, by eliminating launch‑related constraints, this approach promises truly optimized, environment‑specific components. The ripple effects could benefit terrestrial industries—Made in Space is already exploring applications for industrial and defense sectors on Earth.

We will continue to monitor Archinaut’s progress with keen interest.