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Marcus Wolschon

About

I'm trying to design things that serve a practical purpose.<br>Mostly film making gear and parts for CNC machines.<br><br>For my designs I try to also publish<br>* the original file (usually Alibre/Geomagic)<br>* technical drawings with dimensions<br>you can always ASK ME to EXPORT TO OTHER FILE FORMATS.<br>STEP, IGES, ProE, ACIS should be no problem.<br><br>I consider STL to be a lowest-common-denominator output-only format! It's not a format to be edited.<br>

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  • Ultimaker 2 Extended
    Utm2 extended small

    Ultimaker 2 Extended

    UM2 extended

Activity

Commented on Reusable Mask PPE Alternative (MalaMask) 11 months ago
i bent it out of shape when removing the warm mold-half off the bed.
Commented on Reusable Mask PPE Alternative (MalaMask) 11 months ago
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
Commented on Reusable Mask PPE Alternative (MalaMask) 11 months ago
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.)
Commented on Reusable Mask PPE Alternative (MalaMask) 11 months ago
On that Google Drive link, you have placed the files for Contour* in the subdirectory for the mold.
Commented on Reusable Mask PPE Alternative (MalaMask) 11 months ago
You have not answered the question. "Why do you use a 2 part mold anyway?"
Commented on Reusable Mask PPE Alternative (MalaMask) 11 months ago
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.
Commented on Reusable Mask PPE Alternative (MalaMask) 11 months ago
Why do you use a 2 part mold anyway? Since the upper side is flat, you could have used a very trivial one part mold with an open top and nothing could possibly go wrong.
Commented on Reusable Mask PPE Alternative (MalaMask) 11 months ago
Try sealing the mold with something easy to remove, so it doesn't leak. (e.g. a leftover drop of silicone from another casting some hours earlier)
Commented on Reusable Mask PPE Alternative (MalaMask) 11 months ago
I tried subtracting a cleaned up 3D scan of my face. But it wurned out that it's MUCH easier to heat up the mart "Contouer" with a filter assembly attached (so the thread doesn't warp out of shape) and a gasket and push it to your face to have it perfectly conform to your face.
Commented on Reusable Mask PPE Alternative (MalaMask) 11 months ago
What has been updated on the small silicone mold?