Yea, Thats about right.. Took a old unfilled propane tank one of the 4' tall ones and made it into a Resin molding pressure pod. Pretty much you put the figure inside with the negative mold and it removes the bubbles that could form around the figure while the mold is drying.
Oh, I added a special little paint job. now it looks like fun stuff. Eventhough all it holds is air.
Oh, I added a special little paint job. now it looks like fun stuff. Eventhough all it holds is air.
Category Photography / Miscellaneous
Species Unspecified / Any
Size 996 x 474px
File Size 263 kB
Well I really don't need to exceed 60 psi to remove the bubbles.. but the guys at the propane tank place that a normal tank can hold up to 300 psi. in which I really don't want to find out how much does it take to see this thing explode. I used a 1/4" steel rim that goes all around the opening where all the bolts are at and its double welded. it probably could take 300 psi but really its not necessary. I'm going to play it safe and stay around the 60 psi mark
What kind of Psi do you plan to fill that thing to?
I'm recalling an episode of mythbusters here where they talked about, I think, 200psi as being "like a bomb". They then went on to fire chickens at an airplane using something like 50psi.
Also I found this page which may be useful:
http://www.instructables.com/commun.....a-hollow-meta/
I'm recalling an episode of mythbusters here where they talked about, I think, 200psi as being "like a bomb". They then went on to fire chickens at an airplane using something like 50psi.
Also I found this page which may be useful:
http://www.instructables.com/commun.....a-hollow-meta/
Actually I'm surprised that this is using positive pressure! I have been looking around for a vacuum degasser for almost the exact same purposes (removing bubbles from potting compounds) as is suggested by the manufacturer of the resins I'm looking to use. Any thoughts as to positive vs negative pressure?
You can do either. I read a few reports that even some silicons don't need to even be put into a chamber. BUT to help out to make sure your nat wasting time and money is is recommended that the silicone mold is cured inside chamber in which either compresses the bubbles so they compact themselves or a vacuum chamber in which tend to get really expensive but does remove the bubbles. Either way you get the same good results
I'm actually looking to cure optically-clear resins, so pulling the bubbles completely out is more important in my application. I would assume that with the silicon, though, the importance emphasis is moreso just on making sure the surface is as flat as possible instead of necessarily removing the bubbles - hence compacting them would be fine?
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