Dr. Michiel Willemse is leading the team developing the inkjet printing machine at TNO. He says, “The process is unique in its capability to print highly viscous, UV curable, resins. Material formulations with viscosities up to 500 mPa•s (at ambient temperature) have been printed successfully. This offers the opportunity to print products with unequalled mechanical properties when compared to any other printing systems.”
The High Viscosity Inkjet Printing machine is also capable of printing multi-materials simultaneously. Currently, most additive manufacturing machines are only capable of printing one type of material. Not only is the TNO inkjet process capable of printing multi material, it also enables the mixing and grading of materials in any combination that is desired. This will enable the manufacturing of products with two or more materials that are graded and there will be no distinct boundary between the materials. This will result in products with unique mechanical properties. To enable the modelling of products with multi-material and graded structures, TNO has developed a CAD modeller known as Innerspace. InnerSpace enables a designer to define material property distributions and also the distribution profile. The software uses the STL file as the source file and the STL model defines the outer boundary of the object. It can define the material distribution for a whole object or just part of the object at any location. The data files from InnerSpace are very small and thus easy to transfer.
Within Custom Fit, the system is designed and used to print bio-compatible materials; the next step for the project would be to print scaffolds for implants using bio-resorbable materials, with varying porosity and graded inclusion of e.g. growth enhancers and anti-biotics. Dr. Willemse says, “The big challenge is the further development of the concept of printing bio-resorbable implants. Improvement of the machine is a minor effort compared to approval of the medical procedure for modelling a graded implant, printing and sterilising it, and implanting it into a human patient. Given the level of innovation in both technology, material and medical procedures, acquiring the approval from relevant authority such as FDA (Food and Drug Administration) will require a much bigger effort.”
Sunny - Luisa Martínez - Marín | alfa
InLight study: insights into chemical processes using light
05.12.2016 | Fraunhofer-Institut für Lasertechnik ILT
Physics, photosynthesis and solar cells
01.12.2016 | University of California - Riverside
Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.
The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...
Broadband rotational spectroscopy unravels structural reshaping of isolated molecules in the gas phase to accommodate water
In two recent publications in the Journal of Chemical Physics and in the Journal of Physical Chemistry Letters, researchers around Melanie Schnell from the Max...
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05.12.2016 | Power and Electrical Engineering