In composite manufacturing, not all environmental impacts are immediately visible. One of the most critical phases is tooling production: the mould used to manufacture composite parts, which defines geometry, surface quality and final performance. Conventionally, composite tooling is produced starting from large thermoset blocks that are machined to create a master model, later used to manufacture the final tool. This approach requires large amounts of material, long production times and generates significant waste. At end of life, thermoset master models and tools cannot be recycled and are typically landfilled.

TOOL4LIFE is a project co-funded by the EU under the LIFE Programme. It addresses these challenges by introducing a circular approach to composite tooling production in the automotive sector. 

The project has developed an alternative tooling process based on recyclable thermoplastic materials and large-scale additive manufacturing combined with milling. In some cases, the master model can even be eliminated and the tool produced directly. Tool geometry is optimised through Finite Element Method-based topology optimisation, reducing material use while maintaining performance under industrial autoclave conditions. After printing, only limited milling is required to achieve final tolerances and surface quality.

In parallel, more sustainable water-based sealer, release agent and in-mould coating have been developed and applied during composite parts manufacturing. At end of life, thermoplastic tools and machining scraps can be mechanically recycled, re-pelletized and reused in subsequent additive manufacturing cycles, closing the material loop.