Ship propellers, for example, are extremely high-value castings which are made of high-quality alloys (bronze). Impeccable casting is therefore of the essence here.
A tried-and-tested moulding and core manufacturing methods for ship components is the polyurethane-isocyanate or Pentex® process.
The Zollern GmbH foundry relies on the Pentex® process from HA for the production of ship components. Here are the benefits of the process at a glance:
- Short curing times despite a relatively long processability time
- Low binder addition levels
- Unsurpassed flowability
- Smooth, firm mouldings
- Good mould release
- Low odour
Water-glass ester process for ship propellers
Due to the specially curved geometry of ship propellers, demoulding presents a challenge.
This is precisely where a water-glass binder with a special module comes into its own. Because this develops its highest strength slowly, the model can be demoulded while the mould is still “soft”.
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