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MIT researchers are now 3D printing glass

While the thought of a machine that can squirt out endless ropes of molten glass is a bit frightening, the folks at MIT have just about perfected the process. In a paper published in 3D Printing and Additive Manufacturing, researchers Chikara Inamura, Michael Stern, Daniel Lizardo, Peter Houk, and Neri Oxman describe a system for 3D printing glass that offers far more control over the hot material and the final product.

Their system, called G3DP2, “is a new AM platform for molten glass that combines digitally integrated three-zone thermal control system with four-axis motion control system, introducing industrial-scale production capabilities with enhanced production rate and reliability while ensuring product accuracy and repeatability, all previously unattainable for glass.”

The system uses a closed, heated box that holds the melted glass and another thermally controlled box where it prints the object. A moveable plate drops the object lower and lower as it is being printed and the print head moves above it. The system is interesting because it actually produces clear glass structures that can be used for decoration or building. The researchers take special care to control the glass extrusion system to ensure that it cools down and crystallizes without injecting impurities or structural problems.

“In the future, combining the advantages of this AM technology with the multitude of unique material properties of glass such as transparency, strength, and chemical stability, we may start to see new archetypes of multifunctional building blocks,” wrote the creators.

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