Successful Teamwork – RAMPF Tooling contributes to the deve
Production of carbon fiber lay-up tools.
The models, into which the Tooling prepregs (semi-finished product made from carbon fibers) for the production of the lay-up tools were inserted, were made with RAKU-TOOL®epoxy working board WB-0690 and RAKU-TOOL epoxy close contour paste CP-6100. Since the lay-up tools had to be seamless the board material was used to make the smaller models and for the larger models, like side panels, the close contour paste was used.
The model for the side panel made out of CP-6100 was produced as a self-supporting shell without any additional ribbing. This was possible because of the excellent mechanical properties, despite the model’s net weight of approx. 300 kg. Significant cost and time savings were made through the use of this technology.
For the production of the models made out of paste, an oversized negative was produced from EPS and afterwards the close contour paste CP-6100 was applied using the shell structure technique.
After demolding the paste models, they were machined to the final shape by Erglis using a CNC machine. The surface finish of the machined models and further processing took place at the company CrossLink. Once the surface had been sealed and the release agent applied, the tooling prepregs were inserted into the mold. The pre-treatment with sealant and release agent is necessary to enable easy demolding after cure. The lay-up tool made with tooling prepregs was cured on the paste model in the autoclave at a temperature of 50°C.
Advantages of this process.
Through the use of prepregs for the production of carbon fiber lay-up tools, high quality moldsprocess can be produced
(controlled resin content, consistent high mechanical resistance, light and very stiff). Another advantage of the prepreg technology is clean and environmental friendly working (no liquid materials).
The HexPly Prepreg in combination with the resin system M 49 exhibits a perfect surface finish and an excellent UV resistance. Painted surfaces with minimal finishing work as well as high gloss carbon surfaces with unique durability can be produced.