How we make tiller heads

At FREI, we produce tiller heads using the so-called Gas water injection technology. This process enables FREI to guarantee excellent components: Highly stable hollow body structures with lower weight, maximum performance and attractive unit costs.
The special feature of the TiK-WIT process is the combination of the advantages of gas injection and water injection technology. On the one hand, it uses the formation of a gas bubble inside the component without blowholes. On the other hand, the water that immediately follows the gas cools the inner wall of the gas bubble immediately and reduces the cycle time.

The process prevents any foaming of the melt in the gas bubble, which can be triggered by a drop in pressure. The resulting gas bubble forms a kind of "thermal buffer". It prevents the melt from solidifying during water injection or from mixing with the water in such a way that cavities form in the moulded part wall. At the end, the compressed air in the gas bubble pushes the water out of the component again via the injector, so that the component can be removed from the mould dry.

You can rely on FREI.