Nissan has developed a new production process for parts made from carbon fibre reinforced plastics (CFRP).
The new process speeds up the development of CFRP parts. Lightweight yet extremely strong, the material can be used to make cars that are safer and more fuel-efficient. It can also lower a car’s centre of gravity when applied to upper body parts, making it more agile to drive.
Nissan aims to use the new process to mass-produce CFRP parts and introduce them in more cars for customers. The innovation can cut the lead-time to develop such components by as much as half, and cycle time for molding by about 80%, compared with conventional methods.
While the benefits of carbon fibre have long been known, it’s expensive compared with other materials such as steel. Along with the difficulty in shaping CFRP parts, this has hampered the mass production of automotive components made from the material.
Nissan found a new approach to the existing production method known as compression resin transfer molding. The existing method involves forming carbon fibre into the right shape and setting it in a die with a slight gap between the upper die and the carbon fibres. Resin is then injected into the fibre and left to harden.
Nissan’s engineers developed techniques to accurately simulate the permeability of the resin in carbon fibre, while visualising resin flow behaviour in a die using an in-die temperature sensor and a transparent die. The result of the successful simulation was a high-quality component with shorter development time.