Author Topic: Custom Made pressure pot  (Read 5055 times)

Offline artofresin

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Custom Made pressure pot
« on: February 01, 2013, 09:23:23 AM GMT GMT »
Hi there! I 'm Ogyon from Art Of Resin. I would like to share some pics from my new pressure pot I made. I manufactured this tool on my workshop (primary job) to fullfil my simple needs of casting, without having to bother Vall -> our mold maker, to do so. I also made some bigger pressure pots for Vall too, and now I 'm pretty sure, by having him tested them in full time operation, that they work perfectly fine.

The pot is made of CK45 steel. 6,5mm thickness tube, 196mm inside diameter, 200mm length. (Those dimmensions are easily changed by the needs of the caster, but those fit my needs) Bottom is CK45 steel plate 10mm thickness. The cap (Top that seals) is a CK45 steel 14mm thickness plate. I used an air valve that can hold up to 10BARs, and a manometer to track the pressure in the pot. Inside the pot, a stainless piece of metal sheet to hold my mold, as well as a same type of sheet to split the air, while it gets through the pot, so that it doesn't blow on the resin. Finally a high pressure rubber O-Ring, assembled on the cap-plate, to seal the pot.
My paintjob on this pot, failed a bit, but I don't really care as this is made for me. Pots I do for other ppl, have a better outfit :P

Pressure Pot: You might all know, but I will share some info for those guyz who are new in casting: Pressure Pot is the most valuable tool when one wants to cast resin using silicone molds. It is so simple to use, but the results are fantastic. It's meant to remove those "nasty" air bubbles from your resin products, you all hate, as well as, to reach the thin parts of your wonderfull miniatures, such as wires, tip of swords, pointy ears e.t.c.. It manages to do so, by pressing the resin, with the use of air while resin sets. You cast your resin in your mold (using a syringe or something, as normal), and then you put your molds inside the pressure pot. The pot is 100% airtight when you close it's front gate. So when you close the gate, you just turn on the air valve, to insert compressed air inside the pot. 4,5 BAR pressure, is perfect to cast. (My english suck, I know, but sorry about it. If you need more info feel free to ask).

I can certainly guide you, how to make one on your own, if you got access to a workshop with lathe e.t.c., or I can simply supply you one, if you need.







and here is the P-Pot with some molds to show how it looks like while working with that tool:





Have Fun!

Offline GriffinTamer

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Re: Custom Made pressure pot
« Reply #1 on: March 01, 2013, 11:45:12 PM GMT GMT »
Cool. Wish I had your fabrication skills!

I actually just ordered a commercial pressure chamber (actually designed for paint spraying, but reviewed as being good for casting), so I'm hoping that will help me with issues I've had so far with air bubbles in my resin casts.

Do you have any suggestions or advice for a first-time pressure chamber user? I've been working with Smooth-On silicon mould rubber and polymer resin, casting my own 28 mm sculpts. Any thoughts would be greatly appreciated!

One thing I've heard is that one should always pressurize the silicon mould as it is setting or it will distort in the chamber afterward. Also I've ordered some slower-setting resin to make sure I have time to get my moulds into the chamber and pressured before it sets.

Looking forward to trying out the new tech...

Offline GriffinTamer

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Re: Custom Made pressure pot
« Reply #2 on: April 09, 2013, 11:52:27 PM BST GMT »
Hmm... seems like there's not so much interest in pressure chambers for home casting!

Anyhow, I tried mine out recently (first making the moulds under pressure, then doing the actual casts) and I'm quite happy with the results. The new tech definitely seemed to eliminate the bubble problem. I'm excited at the possibilities for a home cast miniatures line!

Offline Hellbeard

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Re: Custom Made pressure pot
« Reply #3 on: April 10, 2013, 08:27:34 AM BST GMT »
Actually, that's really cool. I'd love to have one myself I'm just sure that if I did make my own it would explode and kill me.

Offline Shortcutz

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Re: Custom Made pressure pot
« Reply #4 on: April 14, 2013, 12:54:08 AM BST GMT »
Now that’s a fine piece of equipment you got yourself there. ;)