Additive Manufacturing on 3D Surfaces

Additive manufacturing (AM) is currently at the heart of the digital manufacturing trends. It englobes more than 15 different technologies. They are relying on the fabrication of a part made from mainly 1 or sometimes 2 materials with only 1 fabrication technology. In this study, we are developing technologies and materials to create 3D components on substrates or on 3D objects to form new components with an increase of functionality and complexity. We are particularly focusing on the realization of hybrids millimeter scale components for application in watch and medical field.

One example that we are presenting is the key technologies for the realization of a 3D printed prosthesis fitting the patient’s morphology (for example a knee or an ankle) integrating printed force sensors for monitoring the pressure distribution over the prosthesis surface. It shall give the opportunity to analyze the motion of the prosthesis to detect potential need of kinesiotherapy, minor surgery for prosthesis adjustment or entire replacement in case of failure. It shall lead to a pain reduction and a better recovery of the motor function after surgery. The mechanical part of the prosthesis has been fabricated by Fused Deposition Modelling (FDM), electrical connections and sensors by Aerosol Jet Printing. Two different sensing technologies are under evaluation: LC resonant circuits, to avoid the need of communication circuit inside the prosthesis and resistive sensors.

Several others examples are presented over previously cited application fields.