01-03-2021 high-tech systems & materials

3D glass printer.

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Many materials are used for 3D printing. However, glass presents a special challenge: after melting at unusually high temperatures it is viscous and after solidifying too quickly it becomes brittle. We cracked the ‘glass code’ together with QSIL and built a robust 3D glass printer for QSIL for research and demonstration purposes.

The glass printer we designed and built consists of an oven with a print head and a deposition platform. The platform follows an x-y-z contour beneath the flow of molten glass to create the required product. Crucial to the final result is managing the temperature of the melting glass in the printhead (1,600-1,700 ºC), as well as that of the printing platform, and the surrounding, corrosion-resistant atmosphere. We created a robust, safe construction with accurate positioning and temperature control.

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we are first in the world to build a 3D glass printer with such high-end specifications. ”

We took on the entire project, from specification to installation, using our competencies in mechatronics, thermodynamics, materials science and production. Due to the high process temperatures, controlling the temperature was an important design aspect and we had to develop advanced control and safety strategies. Thermal system simulations served to underpin the design choices in terms of hardware (materials) and software (possible compensations).

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Contact-Lars-de-Groot-Demcon

“we are one of just a few able to achieve this innovation.”

This was a typical multidisciplinary Demcon project. When it involves technologies that do not yet exist, such as 3D glass printing, we are one of just a few in the Netherlands capable of achieving such a feat. I am proud of the fact that together we have met the specifications for temperature, mechanical stability and accuracy.