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Space recyclers<br />

The MakerBot 3D printing company, in partnership with NASA, had a contest in 2014 called the MakerBot<br />

Mars Base Challenge, seeing designs for Mars 3D-printed habitat for astronauts. This design by Noah<br />

Hornberger won first prize<br />

September.<br />

Structures are also contemplated for earth habitat. The UN<br />

estimates that approximately three billion people will need<br />

housing by 2030. Italian engineering company WASP has<br />

constructed a 40 by 20 foot (approximately 6 by 12 metre) 3D<br />

printer that layers clay and builds houses. The project, consisting<br />

of a metal frame suspending a nozzle, is expected to help solve the<br />

global housing crisis with sustainable materials.<br />

For now, actual printers capable of 3D printing in zero-gravity<br />

are smaller. The first zero-gravity printer from NASA/JPL partner<br />

Made in Space was launched on 21 September 2014 as part<br />

of a pack of experiments. The device, tested on a specially-made<br />

aircraft to simulate zero-gravity flight and sent to the International<br />

Space Station, built an ABS-plastic ratchet wrench later tested<br />

on the ground, but proved its value in building tools and parts as<br />

second-generation zero-gravity 3D printers are being devised.<br />

“We are actively researching traditional methods and novel<br />

techniques that use extraterrestrial regolith simulants as feedstock<br />

for additive manufacturing,” said Brad Kohlenberg, Business<br />

Development Engineer for Made In Space, based in Mountain<br />

View, California. “We expect these efforts to help in the overall<br />

goal of making humanity a multi-planetary species. Ultimately,<br />

our participation towards that end could take many forms.”<br />

The Additive Manufacturing Facility by Made in Space was<br />

installed at the International Space Station in April 2016, and this<br />

3D printer will print with a wide range of polymers, is designed<br />

to last the entire lifetime of the space station, and is commercially<br />

available for any customers on Earth who wish to get hardware<br />

into space.<br />

Now that Made in Space has demonstrated technical ability<br />

and built relationships with partners, Kohlenberg said “we are<br />

looking to finally do the things we dreamed about when we started<br />

the company - building the necessary infrastructure for human<br />

spaceflight, in space. That infrastructure could entail everything<br />

from on-demand satellites and habitats to space elevators and<br />

kilometre-scale colony ships.<br />

“As these manufacturing technologies become more<br />

sophisticated and as we reach further away from Earth, Made<br />

In Space imagines a future in which advanced in-situ resource<br />

utilisation and additive manufacturing techniques allow us to use<br />

the resources we find out in space, rather than having to bring<br />

everything we need with us, allowing us to live sustainably and<br />

permanently off-world”.<br />

Pat Carey, Vice President of Go-to-market Strategy and<br />

Programmes for Stratasys, based in Eden Prairie, Minnesota,<br />

says any technology goes through goes through a curve of early<br />

adopters, then mass adoption, which becomes more affordable<br />

because of the volume. All technology follows the same curve, he<br />

said, and with 3D printing, “we’ll follow that same curve and there<br />

will be innovations we can’t imagine that will come out”.<br />

A recycling project called R3DO is a material reclaimer by<br />

Made In Space to reuse material for printing a 3D-printed object<br />

when the original objects breaks or is obsolete. JPL’s Soderstrom<br />

saw similar projects at an electronics show about three years ago:<br />

“In order for us to be able to print in space, we have to be able<br />

to recycle the material…that’s going to be a key to the future,<br />

especially in space.”<br />

Reprinting parts<br />

The recent movie, The Martian, starring Matt Damon, showed<br />

the need for parts in space. “When things go wrong and all of a<br />

sudden, you need something, how do you get it in space?”<br />

Soderstrom said. “It’s not an easy thing. You’ve got to have a<br />

launch vehicle; you have to know what you need, and by that time,<br />

days and days have gone by. What if you could just reprint that<br />

part? We’ve demonstrated that with NASA using Made In Space.<br />

It’s usually made out of ABS plastic, but it shows that it’s possible<br />

to do that.”<br />

It will mean better handling emergencies with speed, he said,<br />

adding: “It’s extremely important for logistics.”<br />

Kohlenberg said ongoing developments that will make 3D<br />

printing more practical on earth are the same things that will make<br />

An artist’s conception of a Mars base (NASA/JPL public domain)<br />

©<strong>2017</strong> The Recycler www.therecycler.com Page 2

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