Stronger than steel, but up to five times lighter: carbon fibre-reinforced plastic (CFRP), often simply referred to as carbon, is ideal for making anything that needs to be incredibly strong, but still very lightweight: aircraft, Formula 1 racing cars and mountain bikes, as well as robots, medical protheses and implants. No wonder carbon is at high demand in the global market.
But there’s a problem: Carbon fiber composite is expensive compared with aluminium or steel, as the manufacturing process is very costly and time-consuming. Composites consist of carbon fibers and plastic to be combined and processed to make the highly durable material. A separate mould or negative form is usually required for every single component, adding to the high production costs.
Producing carbon components without moulds
The ETH spin-off 9T Labs now offers an alternative: It has developed a 3D printer capable of printing carbon fiber composite parts. These are no longer made using cumbersome moulds, but are designed on the computer using dedicated software and then manufactured by the printer. Plastic and carbon fibres are combined directly in the printer, by forcing the materials through a heated nozzle.
“We combine the advantages of 3D printing technology with the valuable properties of carbon fiber composites,” says Giovanni Cavolina, one of the founders of 9T Labs. On the one hand, the new procedure eliminates what is currently the biggest drawback of using this performance material – the high costs. The whole manufacturing process therefore takes less time and money. On top of this, the new technology allows components with highly complex geometric shapes to be produced, such as used in the construction of satellite antennae or a hand prosthesis. Last but not least, using a 3D printer means less material waste.
A meteoric rise
The three founders of 9T Labs are all ETH alumni: Martin Eichenhofer (30), Giovanni Cavolina (26) and Chester Houwink (25). Eichenhofer first had the idea of a start-up four years ago while conducting research in the Laboratory of Composite Materials and Adaptive Structures under Professor Paolo Ermanni. The idea really got off the ground at the start of 2018: a joint-stock company was founded in January that attracted a total of CHF 300,000 from investors. The European Space Agency also invited the young company to join an incubation centre (ESA BIC Switzerland), which not only provided access to another CHF 200,000 but to a good industry network.
