Marcus Wolschon

i bent it out of shape when removing the warm mold-half off the bed.

I've been casting parts from silicone for....quite a while. As a 3D printed part, my try of your 2 part mold had some tiny thermal warping that the bolts could reduce but they of cause also bend the material, forcing other, tiny gaps to open. It did require to be sealed around the outside to not slowly start leaking after 10 minutes. The reservoir seems to have helped with the bot holes in the middle, that I could not seal. Given that you have bolts to keep it together, I found that you forgot about bolts to force it apart again. ;) Interesting video. The idea with the insertable slit is interesting if you still want that round shape. I have a beard and found that a round shape to contact the skin doesn't work very well. A flat shape works much better for a air tight seal. I also used a much firmer silicone then 35 Shore(00) because that's less sticky and doesn't attract dust as much as

Oh, I see. That subdirectory is not for the mold of the seal as published here but an injection-mold for a complete mask. Thanks for the thicker version. I already printed and coated mind and the single piece mold for the seal currently has the silicone curing. (The contour will probably be a bit too short in the first revision.)

On that Google Drive link, you have placed the files for Contour* in the subdirectory for the mold.

You have not answered the question. "Why do you use a 2 part mold anyway?"

Here is a trival 1 part mold I through together. https://www.youmagine.com/designs/single-part-mold-for-reusable-mask-ppe-alternative-malamask The extrusion pass is very roughly meassured because you didn't publish your original design files (very poor style). So I had to so some rough meassurements on the exported STL.