3D printing a revolution in imagination
LEUVEN, Belgium — 3D printing has already changed the game for manufacturing specialized products such as medical devices but the real revolution will come when designers start to rethink the shapes of objects.
3D printing removes the limitations of the manufacturing process from the equation, which means whatever can be designed on a computer can be turned into an object, 3D printing specialists say.
To really start using the technology to its full potential, designers and engineers need to imagine new products.
“You are almost unlimited as to the type of geometric complexity,” said Terry Wohlers, an independent analyst who advises companies on the 3D printing sector.
Belgium-based company Materialise, a pioneer in the process, has a display of a foldable chair printed from one continuous piece of plastic — and made with the hinges already joined together, for example.
“You can do shapes and forms that otherwise would be very expensive to do with traditional manufacturing, or would require many parts that then are later assembled,” Wohlers said.
The 3D process has been used to build prototypes for 25 years, but only now is making its way into regular production. Companies such as General Electric Co. plan to use 3D printing to build lightweight aircraft parts, while dentists use it to create crowns in the space of an hour rather than two weeks.
3D printers have made working guns and are being tested to see if they can make houses on the moon using lunar soil. Scientists hope they may one day print human organs after researchers successfully printed tissue using human stem cells.
President Obama even highlighted the technology in this year's State of the Union address as an example of innovation that can create jobs.
But Materialise CEO Wilfried Vancraen, recently voted the most influential person in the 3D printing sector by readers of TCT Magazine, a publication devoted to the industry, says the process is too slow and too expensive to replace most mass market manufacturing — at least as we now know it.
“3D Printing is not suited to making most of the products that we use today. You cannot print a Stradivarius just as you can't print an iPad,” he said.
“What we have seen is that just replacing a product by a 3D printed product, for instance in the spare part application, is in many cases even not feasible, and in no cases really economical.”
What you can do is involve the computer in the design process, so it can work out how to improve designs, for example to handle stress better.
“Any part that requires some structural integrity, you can let mathematics decide where to put the material,” said Wohlers.
“The design can look very organic and very different than what you would normally see.”
It's in fields such as medicine and furniture and clothing design that the technology has already had a huge impact.
Already, more than 90 percent of in-the-ear hearing aids are made using 3D printing, and that lets clever software which can work out exactly how to optimize the acoustic properties of the hearing aid into the manufacturing process.
Switzerland-based Sonova, a leading maker of hearing aids, is using graphics software to modify the shape of the device once it has been scanned, improving its physical fit to the individual ear canal and its acoustic qualities.
That's all thanks to 3D printing, as this couldn't be done cost-efficiently before.
“Take your fingers, block you ear canals both and speak, and your own voice sounds horrible,” said Stefan Launer, Sonova's Vice President Science & Technology.
“By intelligently placing acoustic vents into these housings you can reduce this effect, and that's what we call an acoustic optimized vent, and that's something we can do with this software.”
The biggest 3D printers, known as mammoth stereolithograhy machines, have a printing area over 2 meters long and can take up to a week to complete the biggest print jobs.
Inside, an intricate pattern of lasers play over the surface of liquid plastic resin.
Layer by layer, they solidify the resin to form the 3D printed object under the liquid. At the end of the print, the object rises out of the liquid as it is pushed up out of the reservoir.
In the case of printing houses on the moon, researchers are experimenting with mixing lunar soil mixed with magnesium oxide and a binding salt, building the structure up layer by layer at about 6.6 feet per hour.
To create human tissue, scientists from Scotland's Heriot-Watt University loaded human stem cells into two separate reservoirs and deposited them onto a plate in a pre-programmed pattern.
The first commercial 3D printer was put on show by South Carolina-based 3D Systems in 1988. Inspired, Vancraen set up Materialise two years later.
“Some printers allow now to mix different materials with different material properties: hard, soft, different densities crossing through one piece,” said Vancraen.
“That is the most unexplored (characteristic), but also the most difficult to really use well.”
He believes that as the new uses emerge, the manufacturing applications of 3D printing will continue to grow, eventually being worth 10, 20 or 30 percent of the manufacturing industry.
Wohlers estimates the 3D printing industry was worth $1.7 billion worldwide in 2011, and will grow to more than $3.7 billion by 2015.
“The growth has been nothing short of phenomenal,” he said.
Show commenting policy
TribLive commenting policy
You are solely responsible for your comments and by using TribLive.com you agree to our Terms of Service.
We moderate comments. Our goal is to provide substantive commentary for a general readership. By screening submissions, we provide a space where readers can share intelligent and informed commentary that enhances the quality of our news and information.
While most comments will be posted if they are on-topic and not abusive, moderating decisions are subjective. We will make them as carefully and consistently as we can. Because of the volume of reader comments, we cannot review individual moderation decisions with readers.
We value thoughtful comments representing a range of views that make their point quickly and politely. We make an effort to protect discussions from repeated comments either by the same reader or different readers.
We follow the same standards for taste as the daily newspaper. A few things we won't tolerate: personal attacks, obscenity, vulgarity, profanity (including expletives and letters followed by dashes), commercial promotion, impersonations, incoherence, proselytizing and SHOUTING. Don't include URLs to Web sites.
We do not edit comments. They are either approved or deleted. We reserve the right to edit a comment that is quoted or excerpted in an article. In this case, we may fix spelling and punctuation.
We welcome strong opinions and criticism of our work, but we don't want comments to become bogged down with discussions of our policies and we will moderate accordingly.
We appreciate it when readers and people quoted in articles or blog posts point out errors of fact or emphasis and will investigate all assertions. But these suggestions should be sent via e-mail. To avoid distracting other readers, we won't publish comments that suggest a correction. Instead, corrections will be made in a blog post or in an article.
- IRS cybersecurity breach touches lives of homebuyers, others
- Task force to plot ways of alleviating gas glut in Pennsylvania via pipelines
- Pitt study suggests health law attracting young to balance insurers’ risks
- UPMC offering buyouts to 3,500 employees in cost-cutting move
- Shoppers pay premium for organic chicken
- Automakers do U-turn on infotainment systems
- Exxon, Chevron shareholders reject big oil restrictions
- Many Americans have no retirement savings, Fed survey shows
- Apple finds bug that causes iPhones to crash
- Stocks bounce back from losses on reassurance from Greece
- Tight supply pushes home prices higher