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Casting & Stabilization Making your own blanks & stabilizing wood blanks.


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Old 08-08-2017, 09:25 PM   #1 (permalink)
 
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Default Assembled the pressure pot

Well I assembled my first pressure pot and getting ready to walk into new territory with casting it looks like alot of fun also.

Testing the pot with my compressor for the first time that gave me a kinda a scary feeling but also very intriguing fun. I have been reading on here and other places of how bad these things can go but its been something I have been wanting to try since the beginning.
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Old 08-08-2017, 11:23 PM   #2 (permalink)
 
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If you are using the Harbor Freight paint pot, keep it at or below 50 PSI and you should not have any problems. They are rated to 60 PSI, but from my research you can do okay with 50 PSI, just let your cast sit in the pot a little longer.
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Old 08-08-2017, 11:24 PM   #3 (permalink)
 
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so what are you planning cast ?
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Old 08-09-2017, 12:27 AM   #4 (permalink)
 
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Are you going to enter the Casting Contest

2017 Summer Extravaganza Casting Contest
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Old 08-09-2017, 04:55 AM   #5 (permalink)
 
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I plan on making my own blanks and maybe I will do the next contest for casting but this casting is new to me so maybe next time
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Old 08-09-2017, 08:00 AM   #6 (permalink)
 
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Pressure has no impact on cure time...just saying. Happy and safe casting.
Do a good turn daily!
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Originally Posted by eharri446 View Post
If you are using the Harbor Freight paint pot, keep it at or below 50 PSI and you should not have any problems. They are rated to 60 PSI, but from my research you can do okay with 50 PSI, just let your cast sit in the pot a little longer.
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Old 08-09-2017, 09:07 AM   #7 (permalink)
 
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What exactly do you mean pressure has no impact dont you just need pressure to have the air pockets come out
But after you have had it pressurized for so long.

How long do you let the pot sit. For me I am just gonna use 1x1x5.25 molds for the blanks till i get better at it
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Old 08-09-2017, 10:04 AM   #8 (permalink)
 
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What resin are you planning to use?
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Old 08-09-2017, 10:11 AM   #9 (permalink)
 
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Silmar 41 from u.s. composites
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Old 08-09-2017, 10:28 AM   #10 (permalink)
 
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Just started with this myself... Grabbed a Grizzly pot and fired it up for the first time just 2 nights ago. There's certainly a bit of a learning curve in timing your pour so you get a good mix of colors. The rest of it is pretty straight forward.

My wife actually did 3 blanks and I did 1 in our first attempt. Mine was... ok... She did a white/purple one on her first try that was amazing. My son actually helped me pour one last night that came out pretty good. I can certainly see why folks say this is addicting.

As for the pressure bit... What folks are saying is that the resin is going to harden at the same rate regardless of how much pressure it is under. Once it is hard, you're not squeezing any more bubbles out. Keeping it in the pot past the point where it's cured doesn't accomplish anything. Keeping in mind I'm a newbie at this too... I take that to mean you're better off getting the max pressure you can safely run for the time before it cures.

Interestingly enough, the lid on my Grizzly says max operating pressure 90psi and the tank itself says 45. I've been running 50 and there are a few stray bubbles up at the top of the blank on occasion but nothing in the core of it.
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