Quote:
Originally Posted by Andy Baker
We are thinking of this, but the shrinkage of nylon as it comes out of the mold is far different than polycarbonate. The whole mold would have to be remade if we were to go with nylon.
Andy B.
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This may not necessarily be the case. Nylon 6-6 (AKA Polyamide) can
shrink at a wide range of rates depending on what filler is used with the resin. The desire to avoid fillers for fear of reducing impact strength was mentioned, but
some fillers can actually improve impact strength.
So it may be possible to mold Nylon 6-6 parts with your existing mold and get close to the same shrink rate. However, the problem may be over-constrained due to the compounded effect of fillers on both shrink rate and impact strength (i.e. there may not exist a filler+resin for which the impact strength is improved, while maintaining your current geometry).