New research could help speed up the 3-D printing process
by Staff Writers
Binghamton NY (SPX) Apr 06, 2017
A team of researchers from Binghamton University, State University of New York and MIT have identified some bottlenecks in 3D printers, that, if improved, could speed up the entire process.
A research team led by Professor John Hart from the Department of Mechanical Engineering and Laboratory for Manufacturing and Productivity at the Massachusetts Institute of Technology, and including Binghamton Assistant Professor of Mechanical Engineering Scott Schiffres, found that many conventional desktop and professional AM systems build objects at about 10-20 cubic centimeters per hour when printing at a 0.2 millimeter thickness.
One limitation of the system is a pinch-wheel mechanism used to feed building material. That wheel is limited in the force it can use (about 60 newtons) and the feed rate (about nine millimeters per second) in order to fully melt building material.
"We found that the rate at which a polymer melts is limiting in many implementations," said Schiffres. "The pressure required to push the polymer through the nozzle is a sharp function of temperature. If the core is not hot enough, the printer will not be able to squeeze the polymer through the nozzle."
"The work has implications for how to scale up additive manufacturing and the trade-off between higher-resolution printing and speed. We hope it will inspire future work to investigate pre-heating of the polymer, and printing with multiple extruders," added Schiffres.
The work was supported by a grant from the Lockheed Martin Corporation, while the Department of Defense, the MIT International Design Centre (IDC) and MIT MakerWorks also supported the project.
MIT graduate students Jamison Go and Adam Stevens are co-authors of the paper.
The paper, titled "Rate Limits of Additive Manufacturing by Fused Filament Fabrication and Guidelines for High-Throughput System Design," is currently available online in Additive Manufacturing.
Washington (UPI) Mar 13, 2017
Researchers at Waseda University in Japan developed a process they say dramatically improves the quality of 3D-printed resin products. The new technique improves surface texture and increases structural rigidity through a process called 3D Chemical Melting Finishing, or 3D-CMF, which uses a tool similar to a felt-tip pen to apply solvent selectively to specific parts of the printed prod ... read more
Space Technology News - Applications and Research
|The content herein, unless otherwise known to be public domain, are Copyright 1995-2024 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. General Data Protection Regulation (GDPR) Statement Our advertisers use various cookies and the like to deliver the best ad banner available at one time. All network advertising suppliers have GDPR policies (Legitimate Interest) that conform with EU regulations for data collection. By using our websites you consent to cookie based advertising. If you do not agree with this then you must stop using the websites from May 25, 2018. Privacy Statement. Additional information can be found here at About Us.