Voxel based Manufacturing through Multi-material 3D Printing
Yinfeng He, Assistant Professor, Centre for Additive Manufacturing, University of Nottingham, UK
Abstract: 3D printing has been well known as a new manufacturing technique that provides the users the freedom of manufacturing customized devices. Most of the 3D printed devices currently contain only one kind of material in their structure, but recent works have showed that some of the additive manufacturing techniques are capable to integrate materials with different functionalities into a single device. Different materials can be printed as voxels which can stack up in a designed arrangement to achieve various complex functionalities. Such a technique can massively empower the user and enable them to design and manufacture non-trivial devices that cannot be achieved before. In this talk, I will introduce some of the latest works in Centre for Additive Manufacturing including the opportunities and challenges in voxel-based manufacturing of devices through Additive Manufacturing.
Biography: Yinfeng completed his BEng degree in Polymer Science and Engineering from Sichuan University, after which he gained his MSc degree in Material Science from Loughborough University. In 2011 he started his PhD study in the Additive Manufacturing (AM) Research Group at Loughborough University, working on Inkjet based 3D Printing of biodegradable polymers. In 2014, Yinfeng started to work as a researcher at Centre for Additive Manufacturing in Nottingham University and promoted to transitional assistant professor in 2018. Yinfeng is now focusing on develop functional polymeric formulations for multi-material inkjet 3D print and project micro-stereolithography’
Overview of fluids printing on textured and rough surfaces - wettability and spreading
Krzysztof Kubiak, Associate Professor, School of Mechanical Engineering, University of Leeds, UK
Abstract: Quality of printing depends on many aspects of the device used to print as well as on the fluid properties, nozzle size, resolution etc… Quite often in ink-jet printing focus is directed on printing device, droplet size and the ink. Much less consideration is given to the substrate on which it is printed. However, to obtain good quality print both are equally important, and both must be considered. In industrial environment, it is much easier to control the printing properties than it is to control the substrate. Each batch of paper, each batch of foil or any other surface may be different and will depend on manufacturing conditions, storage, transport, environmental conditions etc… Those type of conditions are usually out of our control. In this talk, we will look closer at surface properties such as wettability, surface roughness and contact angle hysteresis. We will analyse chemical heterogeneity, patterns and surface morphology of textured surfaces. Considering wide variety of applications, we will look at such technologies as printed electronics, droplet mixing, electrowetting and OLED fabrication.
Biography: Krzysztof Kubiak is Associated Professor at the University of Leeds. He is one of the leading experts in the field of wettability and dynamic fluid-solid interaction. He holds PhD from the Ecole Centrale de Lyon in France and Habilitation form the University of Valenciennes and Hainaut-Cambresis in France. Kubiak has published over 50 peer-reviewed papers and his h-index is 20. He has presented his research at over 45 international conferences and gave 7 keynote and invited talks. Over the last 10 years he has been working on development of numerical approaches for industrial applications in wettability and droplet dynamics using the lattice Boltzmann method, particularly for static and dynamic wettability. He has developed modelling capabilities for droplet impact and spreading as well as mixing and internal dynamics of droplets on surfaces. His interest in inject printing has developed through following projects: Innovation in Industrial Inkjet Technology, UK Consortium on Mesoscale Engineering Sciences, and High-Level Mesoscale Modelling System.