Printer 3D [general debate interests technologies]

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moinsdewatt
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by moinsdewatt » 01/09/13, 10:46

The dark side of 3D printers

THE WORLD SCIENCE AND TECHNO | 26.08.2013

It's known. All technology has its downside. And one of the latest in fashion is no exception to the rule. These are so-called "3D" printers which make it possible to manufacture three-dimensional objects by adding layer by layer of material. First reserved for industry, these machines are starting to be known to the general public, either through websites that manufacture all kinds of products on demand (figurines, toys, jewelry, spare parts, etc.) , or by hackerspaces and "fablabs" ("manufacturing laboratories"), meeting places between handymen, inventors or simple enthusiasts.
Nothing too bad a priori, except that a team from the Illinois Institute of Technology in Chicago has just, for the first time, measured the microscopic dust emitted by these machines in the rooms where they are installed. 3D printers indeed use thermoplastics which are melted, deposited layer by layer, then resolidified; a process that emits tiny so-called "ultrafine" particles.

Specifically, the researchers, as they report in the journal Atmospheric Environment to be published in November, measured particle emissions between 11,5 and 115 nanometers in size, at flow rates between 20 and 200 billion per minute, according to the type of material used. Five printers, brand kept secret so as not to "incriminate a particular manufacturer", served for two and a half hours. A fine particle detector from the American company TSI was used in the room housing the printers.

"FINE PARTICLES"

"These figures are comparable to those of mundane activities such as cooking, consuming candles, consuming cigarettes or laser printing," summarizes Brent Stephens, the head of the study. "The size and the number of particles are not everything. The chemical nature is predominant," adds the researcher, who nevertheless cites the identified risks associated with thermoplastics, observed in rats or mice.

"The experiment is interesting because, a few years ago, measuring these emissions in professional environments was impossible. The values ​​obtained are relatively high. Fine particles can be deposited in the respiratory tract and it is advisable to be careful", notes Olivier Witschger, specialist in aerosol metrology at the National Research and Safety Institute for the Prevention of Workplace Accidents and Occupational Diseases (INRS).

This is also the position of the American group which writes: "These results suggest caution when these technologies are used in unventilated or unfiltered environments." In support of this conclusion, Brent Stephens recalls that, recently, studies have reported fears about laser printers. An American team from the University of Massachusetts-Lowell has thus shown that certain nanoparticles used in these copiers cause inflammation (M. Khatri et al., Nanotoxicology, August).

There is no shortage of work to follow. "Initially, it was one of our students who worked in a store using these machines who alerted us because of the odors he smelled. We ultimately did not study the gases emitted but the particles", recalls Brent. Stephens. "We would now like to study the gases emitted. And compare our results with other 3D printers and other materials. We are also looking for partners in toxicology to test the effects of these particles. And we are also working on developing filtration systems. to be installed on the machines ", continues the researcher. The dark side of 3D printers is therefore also in tune with the times.


http://www.lemonde.fr/sciences/article/ ... 50684.html
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by chatelot16 » 01/09/13, 11:13

was much searching of danger are found everywhere

pay attention to DHMO

3D the printing is a manufacturing process ... without printing 3D can make room with a mill or a lathe dan by cutting a plastic block, and there are also plastic smell of issuance, certainly cause 'echauffement localized plastic, therefore issuance vapor that condense in microparticle

when metals factory, must be lubricated, and issuance of abundant oil mist!

when factory with traditional machine tool is necessarily a nose above to see what we do

3D with printer and other small CNC machine that run every single one can put a cap and an aspiration and fully protect

complete protection is unnecessary for the PLA, but will be useful to try more technical matters such as PVC or nylon

3D the printer can turn very long to make the big room so anyone who wants to make a long walk in the room can put a hood and suction
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by Capt_Maloche » 01/09/13, 23:10

My first impresion 3D be a sex toy : Lol:
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by vinsoux » 02/09/13, 20:40

Hello,

Indeed this type of machine becomes popular we sell on:

imprimante-3d-bobine-plastique.fr/

there are at any price: cheap and very expensive with different qualities.

You can contact us videos or explanations.

I run a small blog that you can complete :)

imprimante-3d-bobine-plastique.fr/wordpress/
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by Christophe » 02/09/13, 20:58

A bit like spameux 1er message not?

It is where the link back?
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by elephant » 03/09/13, 10:05

Chatelot 16 said:

pay attention to DHMO


You're quite right, Chatelot :D : Can drown, scalding, being poisoned by a body contained in solution, catch cold when wet, that whatnot. :D

For the rest, both know it and take precautions. After all, you need a mask to solder, a mask and glasses to grind, a hood for chemistry, gloves for acids ...

Risk identification and protection are part of the work
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by Christophe » 28/10/13, 16:20

Xenius number of the day on 3D printing:

The 3D printers: an industrial revolution?
Monday 28 October 17h20 (26 min)
Already released Monday 28.10 to 8h25

THE 3D PRINTERS: INDUSTRIAL REVOLUTION? Can we really print furniture, teeth and even entire houses? Printers to conquer the third dimension. It sounds like science fiction, but it is technically possible and practical applications already exist.

Plastic, steel or metal, it is now possible to print these materials. Even blood vessels, biological products par excellence, today out of these printers. The principle is simple: a product designed from a numerical scheme grows progressively inside the printer, layer after layer, until the desired shape marry.

The product is forged from one piece - no need to screw or glue or the weld. But we bring this technology in everyday life and in our professional setting? The 3D printers meet our individual needs and produce around the world. The storage of goods, transport, but also any manual production becomes superfluous. Simply having the material to be printed, a printer and a fitting software. Would the 3D printers thus revolutionizing the world?

Presenters X: enius Dörthe Eickelberg and Pierre Girard are addressing this issue. They go to a company in Leipzig and a hacking center. Obviously, prints 3D there are a breeze for technicians and creative!


http://www.arte.tv/guide/fr/048353-023/x-enius
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by Surfeurseb » 03/11/13, 21:34

I'm still not convinced by the 3D printers, but the technique progresses.

Failure for me the most unacceptable is the use of specific plastics, more or less far of the materials used on traditional injected parts.

Which is about to be lifted (partially) by the machine display at the K-Messe Dusseldorf in October, by ARBURG, press manufacturer to be injected.
This machine, which broadly adopts the principle of the 3D printer, except that it uses a conventional plasticization unit, capable of using any granulated plastic material already used in injection, EXCEPT loaded materials (fiberglass by example). Hence the "partially".

We are in the presence of an industrial machine, so for the price, not apparently defined, nothing to do with open source projects. But it will certainly give a boost to the sector and the plastics industry in general.

Site to see: http://www.arburg.com/fr/fr/solutions/freeformer/
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by Grelinette » 07/11/13, 11:42

Last year I visited the Eurocopter company and some workshops already occur with printers 3D parts that are directly used in some helicopters.

For now, the materials used by I3D not allow the manufacture parts that do not need to be very strong, but I guess that progress quickly will make very solid pieces, maybe even metal ? ...
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by Gaston » 07/11/13, 11:52

Grelinette wrote:maybe even metal? ...
It is already done.

There is even a analysis quite impressive.
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