via Rowland Institute
Researchers from Rowland Institute eliminate need for 2D layering
Don’t be fooled by the name. While 3D printers do print tangible objects (and quite well), how they do the job doesn’t actually happen in 3D, but rather in regular old 2D.
Working to change that is a group of former and current researchers from the Rowland Institute at Harvard.
First, here’s how 3D printing works: The printers lay down flat layers of resin, which will harden into plastic after being exposed to laser light, on top of each other, again and again from the bottom to the top. Eventually, the object, such as a skull, takes shape. But if a piece of the print overhangs, like a bridge or a wing of a plane, it requires some type of flat support structure to actually print, or the resin will fall apart.
The researchers present a method to help the printers live up to their names and deliver a “true” 3D form of printing. In a new paper in Nature, they describe a technique of volumetric 3D printing that goes beyond the bottom-up, layered approach. The process eliminates the need for support structures because the resin it creates is self-supporting.
“What we were wondering is, could we actually print entire volumes without needing to do all these complicated steps?” said Daniel N. Congreve, an assistant professor at Stanford and former fellow at the Rowland Institute, where the bulk of the research took place. “Our goal was to use simply a laser moving around to truly pattern in three dimensions and not be limited by this sort of layer-by-layer nature of things.”
The key component in their novel design is turning red light into blue light by adding what’s known as an upconversion process to the resin, the light reactive liquid used in 3D printers that hardens into plastic.
In 3D printing, resin hardens in a flat and straight line along the path of the light. Here, the researchers use nano capsules to add chemicals so that it only reacts to a certain kind of light — a blue light at the focal point of the laser that’s created by the upconversion process. This beam is scanned in three dimensions, so it prints that way without needing to be layered onto something. The resulting resin has a greater viscosity than in the traditional method, so it can stand support-free once it’s printed.
“We designed the resin, we designed the system so that the red light does nothing,” Congreve said. “But that little dot of blue light triggers a chemical reaction that makes the resin harden and turn into plastic. Basically, what that means is you have this laser passing all the way through the system and only at that little blue do you get the polymerization, [only there] do you get the printing happening. We just scan that blue dot around in three dimensions and anywhere that blue dot hits it polymerizes and you get your 3D printing.”
The researchers used their printer to produce a 3D Harvard logo, Stanford logo, and a small boat, a standard yet difficult test for 3D printers because of the boat’s small size and fine details like overhanging portholes and open cabin spaces.
The researchers, who included Christopher Stokes from the Rowland Institute, plan to continue developing the system for speed and to refine it to print even finer details. The potential of volumetric 3D printing is seen as a game changer, because it will eliminate the need for complex support structures and dramatically speed up the process when it reaches its full potential. Think of the “replicator” from “Star Trek” that materializes objects all at once.
But right now, the researchers know they have quite a ways to go.
“We’re really just starting to scratch the surface of what this new technique could do,” Congreve said.
Original Article: Making 3D printing truly 3D
More from: Harvard University
The Latest Updates from Bing News & Google News
Go deeper with Bing News on:
Volumetric 3D printing
- Best 3D Printer Deals 2022
We're tracking all the 3D Printer deals below as well as the savings on consumables and accessories. Anycubic Kobra 3D Printer: was $379, now $359 at Amazon A powerful FDM 3D printer that produces ...
- 3D Printing Market Share 2022 – Global Growth, Trends, Industry Analysis, Key Players and Forecast 2027
Global 3D Printing Market report precisely offers the necessary information, as well as advanced analysis, to assist ...
- Nexa3D Adds New Photoplastic Materials, Further Expanding its Industrial 3D Printing Applications
Nexa3D, the leading maker of ultrafast professional and industrial polymer 3D printers, today announced the expansion of its high performance functional resin portfolio, with the immediate commercial ...
- Nickel Alloy Inconel 625 Now Qualified on All Desktop Metal 3D Printing Systems, including the Shop System™
Desktop Metal, Inc. (NYSE: DM), a global leader in additive manufacturing technologies for mass production, today announced that nickel alloy Inconel 625 (IN625) has been qualified on the Shop System, ...
- SV04 IDEX 3D printer with dual extruders and more only $489
If you are searching for an affordable 3D printer equipped with a wealth of features including dual printing heads, auto levelling and a large 300 x 300 x 400 m print volume it might be worth your ...
Go deeper with Google Headlines on:
Volumetric 3D printing
Go deeper with Bing News on:
- Astronauts Could 3D-Print Tools on Mars Made From Martian Dust, Says Exciting New Study
We could 3D-print tools on Mars made from the planet itself—and that could change the future of space travel, according to engineers.
- Astronauts could use Mars soil for 3D-printing on the Red Planet
Making things for Mars astronauts on-planet would be a boon for future human missions. Martian soil could serve as a 3D-printing material, researchers have shown, meaning it could be used to ...
- Bio-Inspired Inks for 3D Printing of Next-Gen Wearable Tech
A new bioink mimics conductive human tissue for the development of wearable technology that is more compatible with the human body, paving the way for novel “integrated” electronics applications, ...
- Geeetech THUNDER Kickstarter Campaign Starts, High Speed 3D Printer Up to 300mm/s
SHENZHEN, China, Sept. 15, 2022 /PRNewswire/ -- From September 15 th, Geeetech's new 3D printer THUNDER with up to 300mm/s printing speed is ready for pre-order on Kickstarter. Super early birds will ...
- 11 Tech Experts Discuss Innovative And Effective Uses For 3D Printing
From easily manufacturing industrial components to creating edible food products—and quite a lot more—3D technology could revolutionize the ways we live, work and play.