In direct comparison, the new PDB process has many advantages over the conventional ODB process.
“Long and thin cores are becoming more and more demanding, which is why our foundries are increasingly reaching their limits, despite their design freedom in furan resin-based 3D printing. In a particular case concerning a cylinder head spout, the water jacket core repeatedly broke because the strength in the printing process did not withstand the pressure of the molten metal. An “upright” casting, in order to exert a low bending moment on the core, requires no improvement. Depending on the customer's requirements, the binder content and the annealing loss can be flexibly adapted, which ultimately results in the desired outcome for the core mentioned, printed in PDB, with a bending strength of 390 N/cm²” according to Alexander Kudernatsch, Vice President of Services at voxeljet.