Printing with TPU went smoothly right from the start, though the retraction needs to be increased slightly to reduce stringing and produce neater seams.
As expected, the support material was very difficult to remove; I simply need a printer with two nozzles.
The elasticity isn’t very high; for this type of membrane, this TPU is far too hard, inflexible and unusable.
I’ll try printing a bellows again, but I reckon this TPU is completely unsuitable as a flexible piston replacement.
Is it worth giving PEBA a go, or should I just try making moulds for casting with silicone rubber straight away?
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