I have a client who wants some components in the flexible resin, I think the component is a gasket or similar item. It’s a circular torus, about 27mm in Diameter, with the printable section about 3mm in diameter - it’s hollow and the walls are only .35mm in cross section. As someone who has only used the regular resins this seems far too thin - I would normally print cross-sections at 1 - 1.5mm as a minimum as much as possible. Does any one have any experience or recommendations?
Thanks.
yes that is far too thin for the flexible resin the thinnest I have been able to print was 1.3mm thick but even then the massive size of the support point poked through so I had some minor bumps to sand out. For me it was okay but it sounds like the features your client would require are too thin in my eyes.
So, basically an 27mm x 3mm O-Ring.
Why does it need to be hollow? How did they plan on manufacturing that?
Why not print a two-piece mold and pour it with silicone?
Heh, or better, design around standard O-Ring sizes and types 
It has some extra bits on it, 3 prongs or ‘legs’ spaced 120°degrees apart so it’s not a straight forward ‘O ring’. I’m not sure why it’s hollow but that’s the way it’s been designed. I’m going to advise a redesign as it just doesn’t seem printable in its current form.
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