<p>I am planning on getting a 3D printer soon and I was just wondering, what do you do with 3D prints that either failed or were prototypes that you no longer want?<br>
I tried looking online but the closest I got was effects on environment, turning prints back into filament, or restarting a failed print half-way, none of which were the information I was looking for.  </p>

<p>The solution should be somewhat eco and just keeping unwanted prints in a box somewhere isn't a very good solution either.<br>
Finishing off failed prints isn't totally applicable because it wouldn't apply to prototype prints that you don't want to keep.</p>

<p>Is there anywhere to send failed 3D prints for professional recycling, or are there any recommendations for properly disposing 3D prints?  </p>

<p>In case this is of any use, the printer I am planning to get uses filament that can be made of PLA, ABS, Nylon, and possibly other materials. The printer is this one specifically (<a href="https://www.kickstarter.com/projects/101hero/101hero-the-world-first-us49-3d-printer">https://www.kickstarter.com/projects/101hero/101hero-the-world-first-us49-3d-printer</a>) from KickStarter.</p>

[{'answer_id': 1267, 'author': 'Tom van der Zanden', 'author_id': 26, 'author_profile': 'https://3dprinting.stackexchange.com/users/26', 'pm_score': 3, 'selected': False, 'text': "<p>It will be very difficult to find a recycling facility that will accept your 3D prints, because they're mainly set up to handle packaging material (which constitutes the vast majority of plastic waste) such as bottles. If you sent your 3D prints to your municipal recycling programme they would at best sort it out from the packaging material and incinerate it, and at worst it would contaminate a batch of recycled plastic (of a different type).</p>\n\n<p>You might be able to find a recycling company that specializes in recycling the plastics used in your printer, but given the extremely low volume involved it is not worth their or your time to handle it.</p>\n\n<p>You should discard your prints as household waste, and offset your environmental impact some other way (by paying for some trees to be planted, or investing in renewable energy,...) - this would be a more viable use of your time and resources.</p>\n"}, {'answer_id': 1269, 'author': 'Ryan Carlyle', 'author_id': 298, 'author_profile': 'https://3dprinting.stackexchange.com/users/298', 'pm_score': 5, 'selected': True, 'text': '<p>The "obvious" answer is re-grinding the prints and making more filament. Unfortunately, this isn\'t yet a very economical or simple operation. A decent filament extruder capable of holding acceptable diameter tolerances is around $1000, and even then they can be pretty fidgety to operate. You have to have a LOT of volume throughput in your filament extruder for regrinding to be an economical proposition. </p>\n\n<p>Some of the reasons why recycling prints into filament can be difficult:</p>\n\n<ul>\n<li>Most plastics will degrade to some extent each time they are extruded. (Both by the 3d printer and by the filament extruder.) PLA will thermally degrade with extended exposure to heat. PET will hydrolyze and break down if not meticulously dried to remove moisture prior to heating to the melting temp. (PETG seems to be less prone to hydrolysis damage than plastic bottle PET, but it still happens to a limited degree.) ABS holds up to extrusion conditions better than most, which is part of why it\'s favored for injection molding, but there\'s still the potential to affect properties by depleting additives or cooking out plasticizers. <strong>In practice, this means regrinds generally need to be mixed with fresh pellets at some ratio.</strong> That dilutes the degraded or additive-depleted polymer with good material so you can maintain the material properties and performance. </li>\n<li>If you print a variety of different colors, and don\'t want all your recycled filament to mix and end up a muddy brownish color, it can be difficult to manage the color sorting and matching. Most people don\'t want different colors along the length of a spool, either. So the regrind has to be mixed evenly in with virgin pellets and a suitable amount of masterbatch colorant to get a reasonable color output. You\'re not going to run off a new spool with 95% virgin pellets just to recycle a 50 gram failed print, are you? Likewise for material matching. Mixing materials is a bad idea. <strong>If you only print white PLA, this is all pretty easy to manage. But if you print a variety of colors and materials, you\'ve got to set up a material tracking, sorting, and storage operation.</strong> You <em>can</em> do it... it\'s just a hassle. </li>\n<li>Diameter control is difficult. 3D printers need a fairly tight diameter control for reliable performance and good quality. This is really the key challenge in any filament extrusion process. Extruded polymers like to change shape as they extrude and cool due to molecular alignment effects. You can\'t just push molten plastic out a 1.75mm nozzle -- "die swell" will make the extrudate bulge to a larger diameter immediately upon exiting the nozzle. Then you have to actually <em>pull</em> on the soft filament as it cools to carefully draw it down to the right diameter. The way the filament extruder measures diameter and controls tension is the key to getting acceptable results. Most hobbyist/desktop filament extruders have not succeeded at this. </li>\n</ul>\n\n<p>Those are just the major issues. Filament extrusion is a complex subject with a lot of depth. For a home user of 3d printers, making filament basically becomes a whole second hobby. In my opinion, it only really makes sense in a commercial production printing environment where paid technicians can run the extruder(s) and a very large print throughput makes the pellets+regrind economics much more favorable than just buying new filament. </p>\n\n<p>Reducing and reusing are preferable to recycling. Making your printer more reliable and gaining experience with calibration/configuration will reduce the volume of waste produced. </p>\n\n<p>There are also some productive uses that let you reuse unwanted prints as-is or "downcycle" them for productive uses. </p>\n\n<ul>\n<li>I personally keep a box of failed prints (and calibration prints and\nno-longer-needed prototypes) as showpieces for people who want to\nlearn about 3D printing, and as toys for my nieces and nephews. I strongly recommend doing your calibration prints with a "toy" calibration model like <a href="http://www.thingiverse.com/thing:763622" rel="noreferrer">Benchy</a> or <a href="http://www.thingiverse.com/thing:1090268" rel="noreferrer">CaliBlocks</a>. 3D printing is still new enough that people will happily take dozens of Benchies off your hands for the novelty value.</li>\n<li>Failed and unwanted prints can also be used around the workshop for shims, sacrificial\ncushions when clamping or hammering or drilling, or as scrap for experimenting\nwith adhesives or post-processing techniques.</li>\n<li>ABS scraps are good for making ABS-slurry as a print bed adhesion treatment\nlayer, or for solvent-painting and filling gaps in other prints. Unfortunately, most other filaments do not have such convenient and safe solvents.</li>\n<li>Some people have experimented with putting piles of scrap prints on a cookie sheet in an oven and melting them into multicolor cutting boards. There\'s a lot you can do with this sort of heavy remelt plate if you get creative. (I personally wouldn\'t use cheap Asian filaments for food contact though, they often have unpleasant contaminants.)</li>\n</ul>\n'}, {'answer_id': 1270, 'author': 'FrankL', 'author_id': 1169, 'author_profile': 'https://3dprinting.stackexchange.com/users/1169', 'pm_score': 2, 'selected': False, 'text': '<p>At Chaos Computer Club summit in Winter there was a talk from a Maker who recycled by himself.</p>\n\n<p><em>How can be 3d printing a dual use technology? Print more things, produce less waste, save money!</em>\nYou can see the talk here  <a href="https://media.ccc.de/v/32c3-7321-re_cycle" rel="nofollow">https://media.ccc.de/v/32c3-7321-re_cycle</a></p>\n\n<p>Update: At Fabcon3D in Erfurt/Germany there presented two startups their prototype for filament extruder. You can either recycle old print-puts or compose your own filament with pellets. <a href="http://mcubus.com/" rel="nofollow">http://mcubus.com/</a> and <a href="http://3devo.eu/" rel="nofollow">http://3devo.eu/</a>\nIm not shure how mature their "product" is. But it will be soon.</p>\n'}, {'answer_id': 14359, 'author': 'Migster', 'author_id': 12721, 'author_profile': 'https://3dprinting.stackexchange.com/users/12721', 'pm_score': 0, 'selected': False, 'text': '<p>If you have a few friends you could pitch in and use a recycling service like <a href="https://www.terracycle.com/en-US/zero_waste_boxes/3d-printing-materials" rel="nofollow noreferrer">Terracycle</a> where you can send your failed prints, rafts and scraps. No affiliation with Terracycle, it\'s just a service that I found and am considering.</p>\n'}]
['https://3dprinting.stackexchange.com/questions/1266', 'https://3dprinting.stackexchange.com', 'https://3dprinting.stackexchange.com/users/2032/']