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COmposite Mould Tool Based On 3D Printing

In collaboration with international partners we contribute to the development of an improved RTM tool made from a carbon fibre reinforced thermoplastic. Our part is the design of conformal cooling channels (CCC). By utilising additive manufacturing, their shape and path can be chosen more freely than conventionally possible.

When designing the channels, we make use of computational methods to simulate the flow within. This allows us to assess their performance and apply geometrical optimisation. We put our emphasis not only on a reduction of internal pressure loss, but also on achieving a high temperature homogeneity on the tool surface. Thus, a higher part quality is possible at a reduced cycle time.

More specifically, we investigate the influence of profiled channel profiles on the conjugate heat transfer. What shape of the pipe cross section results in the most efficient heat transfer throughout the system? Aside from this, we tackle the problem of cold spots caused by abnormally high heat transfer due to locally increased turbulences. These arise at geometrical section such as bends and bifurcations. Utilising a shape optimisation tool, we can achieve a more homogeneous flow field.

3D View of bifurcation: transition from one circular to two elliptical channels



  • COMBO3D – COmposite Mould Tool Based On 3D Printing
  • Programme: H2020-EU. - ITD Airframe, Clean Sky 2 Joint Undertaking
  • Funding agency: European Commission
  • Duration of project: 04/2019 - 03/2021
  • Projectcoordination: Technische Universität München https://www.tum.de/


Projekt partners