Researchers conducted preliminary lifecycle analyses of three small plastic objects: a child's building block, a spout for a watering can, and a citrus juicer. (Source: Joshua Pearce, Michigan Technological University)
3D printing is no longer a monolithic entity: it consists of many different technologies and materials, and a wide range of printers. So the costs of printing, depending on how one defines them, also range very widely, and generalizations don't really apply. The point of this particular study is that, at the low end with a cheap printer, consumers can save money making actual end-production objects. Regarding what will or won't happen with the higher end of 3D printing, including the proportion of end-products vs prototypes, a recent study by the long-term market research firm in this area (Wohler Associates) shows that finished goods have grown from 3.9% to 28.3% of revenue in just eight years (2003 to 2012) across all 3D printing sectors. This is true for GE Aviation and other high-end manufacturers. Stay tuned.
3D printing may be cheap in the long run but the costs of the same in the short term are prohibitively high. Very few companies can afford to use any 3D printers, let alone afford to buy the same. The costs go way beyond the costs of buying regular plastic raw materials and, as such, most companies will most likely stick to the latter for a long while to come.
Greg, the health effects of the plastics used in 3D printing is definitely a subject that's received some attention recently. But the measurements of "green" are quite specific and don't take health effects on human users into consideration: they're usually aimed specifically at reducing energy use, and therefore carbon emissions in the environment. That requires using an entirely different set of variables and measurements from those used to measure health effects. I think it would be confusing to merge the two. OTOH, I do agree that the health effects of the materials need more attention.
Jim_E, I was skeptical, too about the $2,000 figure. But it's amazing a) how much plastic the average American household consumes in a year and b) how many things can now be printed at home using 3D printers because of the machines and the availabilty of online open-source .STL files, plus cheap materials. The earlier open-access article we give a link to details how the researchers arrived at that figure as the maximum.
Good perspective on the energy savings benefits of 3D printing. However, one further consideration to evaluate when classifying a 3D printer as 'green' is which process is being used? I may have a different definition than others, but I assume that 'green' also means less harmful or toxic to human beings.
Some 3D printers may use less energy, but certain processes use hazardous or toxic materials (which can be harmful to humans). One 3D process that I used would cause skin allergies if the user was over-exposed due to frequent contact. Another process caused my co-worker to have a brief case of silicosis. I would suggest that in addition to energy consumption, that 'green' metrics also include the potential impact to the environment and to the operator's health.
Last week, the bill for reforming chemical regulation, the TSCA Modernization Act of 2015, passed the House. If it or a similar bill becomes law, the effects on cost and availability of adhesives and plastics incorporating these substances are not yet clear.
The latest crop of coating and sealant materials and devices has impressive credentials. Many are designed for tough environments with broad operating temperature ranges, and they often cure faster, require fewer process steps, and produce less waste.
A new program has been proposed for testing and certify 3D printing filaments for emissions safety. To engineers who've used 3D printers at home this is a no-brainer. It's from a consumer on Kickstarter, and targets use in homes and schools.
For the last 50 years, the Metal Powder Industries Federation (MPIF) has sponsored an awards competition for creative solutions to designing and fabricating near-net-shape parts using powder metal (PM) technologies. Here are the seven Grand Prize winners of the 2015 contest.
Graphene 3D Lab has added graphene to 3DP PLA filament to strengthen the material and add conductivity to prints made with it. The material can be used to 3D print conductive traces embedded in 3D-printed parts for electronics, as well as capacitive touch sensors.
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