Impellers - Import export

• Mold measurements up to 4 x 2 x 1 m • Does away with elaborate and expensive mold set-ups • Short throughput time (a few days) • Sand molds correspond 1:1 with CAD model • Structures can be designed in accordance with requirements, without having to watch for draft angles or undercuts • Special sands prevent casting problems • Surface quality can be adjusted through use of different sands • Coarse-grained sands for high gas permeability • Considerable flexibility with changes in geometry, without additional expenses • No storage or maintenance of patterns • Cost savings particularly for complex molds and batch sizes of 1 to several hundred pieces

• Model measurements up to 1.000 x 600 x 500 mm • Same handling as for conventional wax parts • Tool-less and hence more cost-effective process • Single items and small series can be produced within a few days • High degree of accuracy: ±0.4% (min. +/- 100 µm) • Wax infiltration creates closed smooth surface • Suitable for autoclaves, even for thin-walled shells • Can be burnt out in normal kiln with low emission formation • Does not expand during burn-out process, hence no shell cracking (whether gypsum or ceramics) • Residual ash contents <0.02% for polypor binder type C • All alloys can be used with lost-wax casting process