Due to decades of experience with the shell mould casting process we rank among today’s leading European suppliers. A characteristic feature of this technique is the fact that the material is not cast in block moulds but in thin resin-bonded sand shells.
Shell mould process
This technique uses metal casting patterns manufactured on the basis of 3D-CAD data. The patterns are mounted on plates together with the casting system. In the moulding machine the pattern plates are heated to approx. 220°C, then artificial resin-coated quartz sand is poured on them. Due to the thermal influence, the sand is hardened. By controlling time and temperature, two mould halves with a minimal and thus very economic wall thickness are generated, hence the name “shell”.
Precision without limitation
The technique with the "shell" assures constantly high quality standards:
- Excellent surface quality
Average surface roughness Rz 100-150 µm according to DIN 4766.
- High dimensional accuracy
Mould cone of 0.5 ° is possible, dimensional variation tolerance of the casting in the dimension of the tolerance range DCTG 9 acc. to ISO 8062-3.
- Low machining overmeasure
Machining efforts are reduced respectively completely eliminated which saves time and money.
- Practically unlimited service life of the patterns
Using steel for the patterns assures the stability of the models.
- Perfect reproducibility
Due to the stability of the steel patterns each casting is equal to the others.