Chomarat reinforcements used in automotive roof part

The company is part of an industry partnership headed by KraussMaffei to produce fast cycle auto parts with Class A finish using RTM. The process can be seen live at the K Show.

For the first time, a carbon fiber roof panel for the Roding roadster is being made in real time, and mass produced, at the K’2013 show in Düsseldorf. This innovative project is the result of a multi-company partnership between major players in composites, under the leadership of KraussMaffei (Munich, Germany and Florence, Ky.).

This latest technological advancement, in an RTM process using a polyurethane resin system with short cycle time, makes it possible to produce composite parts with an excellent surface quality directly out of the mold. Indeed, the challenge of this process is to obtain, with the same tooling, a surface appearance that is compatible with both a visible carbon design and a surface quality allowing class A paints without any preliminary preparation or subsequent retouching.

The use of Chomarat's trademarked C-PLY Spread as a reinforcement contributes to the success of this project. C-PLY is a line of non-crimp fabric (NCF) carbon reinforcements developed by means of the latest fiber spreading technologies. The line provides perfectly flat and homogeneous thin layers which limit the occurrence of microcracks. Its special construction gives it the necessary flexibility to make it readily deformable, and allows good positioning in the mold while still maintaining good permeability for RTM injection.

In addition to its visual qualities, the use of C-PLY Spread reduces the cost and weight of composite parts while optimizing performance. Live demonstrations will take place at KraussMaffei Hall 15, B27/C24/C27/D24 during the K’2013 Show, through Wednesday October 23.