3-D printing: The next big thing?
Imagine 'printing' your own 3-D toys or models
Computerworld - Heading a start-up after leaving his position as head of Microsoft Game Studios, Ed Fries thought that he might be able to sell 10,000 units of his product -- personalized online game figurines -- the first year.
After two months, about 100,000 people had signed up, and Fries had to institute a lottery to determine which customers would actually be served.
Fries and his his start-up, FigurePrints LLC in Kirkland, Wash., are using a process called 3-D printing that uses printer-like machines to build small models, parts and prototypes. The technology has been around for a while but is moving closer to the small shop and perhaps even the consumer space, some observers say.
FigurePrints.com makes one-eighteenth-scale figurines of action characters developed (through lengthy game play, during which they acquire armor and attributes) by players of the World of Warcraft multiplayer online game.
The buyer chooses a pose and a pedestal, and the figurine (averaging 4 in. high) is shipped with a bell-jar dust cover for $99.95, plus $14.95 for shipping and handling. With four machines built by Z Corp. running around the clock, Fries can make 48 figurines per day. The initial 100,000 prospects, meanwhile, amount to about 1% of the 10 million World of Warcraft subscribers.
How does it work?
3-D printing is the low end of a market variously called rapid prototyping (RP) or additive manufacturing. 3-D computer-aided design (CAD) files are converted into thin slices that are then built one upon the next using various processes, including heated powders, extruded plastic filaments and resins precisely cured with lasers, explained Terry Wohlers, head of Wohlers Associates Inc., an RP consulting firm in Fort Collins, Colo.
It's almost the reverse of taking a small model and slicing it into a multitude of layers. A 3-D printer is able to "print" the first layer of the model using, for example, a plastic-like substance. It then "prints" the next layer on top of that one, and so on. In the process, all the slices are bonded together, and you end up with a solid, 3-D representation of the model described by the CAD file.
Fries' experience might be a foreshadowing of a technological development that could sweep away economic pillars such as manufacturing and distribution.
The idea goes like this: Today, information is readily available online and can be faithfully reproduced locally with laser or ink-jet printers. But tomorrow, many more descriptions of 3-D objects may be available online, and consumers will be able to faithfully reproduce them using 3-D printing, circumventing most stages of commerce.
Most of the resulting models are basically plastic prototypes suitable for form, fit and function testing, or for casting molds. But some high-end processes produce metal parts suitable for immediate use, Wohlers said. Prices for commercially available 3-D printers currently start at about $20,000. At the high end, you need several hundred-thousand dollars to get started, he said.
What about accuracy?
As for the accuracy of the printed models, RP tolerances aren't as good as what's available with plastic injection molding, explained RP consultant Todd Grimm, president of T. A. Grimm & Associates Inc. in Edgewood, Ky. But they can be better than investment casting, which is used to make items such as golf clubs and other metal items that will be subjected to further finishing, he added.
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