Post by manuel on Jan 18, 2017 20:29:01 GMT -5
Hi everyone,
I've built my own vacuum chamber and it seems that I can't make it work properly.
I need to degas high viscosity silicone.
Everything seems to be working fine but I can't get the silicone to completely inflate and collapse like it should. I can only get to the point where the silicone gets foamy and full of small bubbles and then nothing else happens even if I leave the pump on for 20+ minutes. See photos.
I started with a 4 CFM pump only to realize that it was not strong enough. Then I changed it for a 7 CFM without much more results. And now I changed it again for a 14 CFM and I am still stuck at the same point more or less. So now that I've pretty much ruled out the pump factor I'm kind of desperate and looking for answers that could explain what is happening.
My chamber is a 22 quarts presto with an acrylic sheet cover.
Any advice will be much appreciated.
Thanks!
Manuel
I've built my own vacuum chamber and it seems that I can't make it work properly.
I need to degas high viscosity silicone.
Everything seems to be working fine but I can't get the silicone to completely inflate and collapse like it should. I can only get to the point where the silicone gets foamy and full of small bubbles and then nothing else happens even if I leave the pump on for 20+ minutes. See photos.
I started with a 4 CFM pump only to realize that it was not strong enough. Then I changed it for a 7 CFM without much more results. And now I changed it again for a 14 CFM and I am still stuck at the same point more or less. So now that I've pretty much ruled out the pump factor I'm kind of desperate and looking for answers that could explain what is happening.
My chamber is a 22 quarts presto with an acrylic sheet cover.
Any advice will be much appreciated.
Thanks!
Manuel
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