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- ISO 9001 Certified -

Expert in lead and low melting point alloys

Meltable core

Definition and use

Today, LEMER foundry supports the development of composite by proposing an innovative process of shaping.


The fusible core is a metallic part on which is shaped a composite material. By heating the whole system, the core melts to form a hollow composite part, which may contain geometric pieces that can’t be demolded, while respecting internal dimensional tolerances.


The core melting point is usually ranged between 20°C and 200°C in order to reach a temperature a few degrees above the implementation temperature of the composite item.


Draping, RTM (Resin Transfer Molding) and filament winding of thermoplastics and thermosetting materials are a few examples of processes compatible with meltable core.


After use, the alloy is sent back to the foundry, where it is controlled and reintegrated into the production material cycle in order to manufacture other meltable cores.



Hollow carbon piece made from a fusible core (RTM process)




We offer a large panel of fusible alloy and eutectic alloy from 20°C to 200°C adapting to specific needs.


These metallic fusible plugs are made of steel with a low melting point alloy : eutectic, single phase, binary or ternary.


The use of a DSC (Differential Scanning Calorimetry) is a guarantee for the melting point of these thermal stoppers.