ATTENTION: As of March 2017 the Resin Addict Forums are being wound down.
New members are no longer being accepted. Read more about it here.

Pressure Casting Equipment

Tutorials and resources. Beginners start in here!

Moderator: Wardens

Re: Pressure Casting Equipment

Postby mangozac » Sat Oct 08, 2011 8:40 am

Good tip with the vaseline sealing the Lego mould box - I just don't like the idea of having to clean it up afterwards! The small amount of seepage hasn't been enough to bother me, but I figure if it does reach that stage I would just run some packing tape down the inside of the mould.
Oh yeah I can make that....
User avatar
mangozac
Resin Addict Collaborator
 
Posts: 4271
Joined: Fri Oct 16, 2009 3:40 pm
Location: QLD, Australia

Re: Pressure Casting Equipment

Postby Fleafa » Sun Oct 09, 2011 10:33 am

I sometimes use a hot glue gun. Recently, I rolled out some plasticine nice and thin and pressed the mould box onto it.
User avatar
Fleafa
Junkie
 
Posts: 835
Joined: Thu Jul 07, 2011 2:56 am
Location: Fareham, Hampshire, UK

Re: Pressure Casting Equipment

Postby mangozac » Sun Oct 09, 2011 11:24 am

Fleafa wrote:Recently, I rolled out some plasticine nice and thin and pressed the mould box onto it.

I've always done it that way. Probably not the fastest, but it works well and definitely prevents leakage out of the bottom!
Oh yeah I can make that....
User avatar
mangozac
Resin Addict Collaborator
 
Posts: 4271
Joined: Fri Oct 16, 2009 3:40 pm
Location: QLD, Australia

Re: Pressure Casting Equipment

Postby Lane » Mon Oct 10, 2011 11:51 am

Depending on the mold I either:

Press the mold block into the base layer for a two part mold. This mostly seals the clay to the box preventing bottom leakage. A quick pass with the tail end of a brush seals the edges.

or

Use poster adhesive to seal the bottom of the box if making a single sided or cut mold.
Lane
Habit
 
Posts: 243
Joined: Sat Mar 19, 2011 4:02 pm

Re: Pressure Casting Equipment

Postby Hiflt4@juno.com » Sun Dec 04, 2011 11:40 pm

factor40 wrote:I've been scouring the forum here, reading everyone's info about their pressure casting setups and I'd like some advice. Take a look at this:

http://www.finishsystems.com/resincastingpressurepots.html

I'm looking at the first model, the 2.5 gal. This looks as though it's all ready to go, no modifications needed. Am I reading that correctly?

What do you guys think about this as opposed to going the other route and doing my own mods to a cheaper pot? Keep in mind that I am probably less mechanically inclined than all of you.

If I go with the above item, any suggestions on a suitable compressor?


I have the 51-701C C.A. Technologies Resin (Mold) Casting Pot - 15 gallon. If you have the money I reccomend the company. But this guy set me back almost 1200 including the freight shipping *ask for ups they can do it for cheaper* Had to invest in another vaccum pump to work in tandem. Works with both pressure and vacuum up to 80psi but does not come with a vacuum gaudge.

Its very top heavy, i ended up bolting it to a table with some L frames useing the bolt system from the wheels and placed a wooden board inside to make a flat bottom. Now i simply place my molds in a plastic shoe box pour and load them into the wood tray.

If your just starting out use the harbor freight one if this is your passion pony up for it.
Hiflt4@juno.com
Casual
 
Posts: 38
Joined: Mon Jun 06, 2011 1:20 am

Re: Pressure Casting Equipment

Postby Eltnot » Mon Dec 26, 2011 10:20 pm

Just a heads up for those in Australia, Super Cheap has 10L pressure paint pots on sale for $99 at the moment.
User avatar
Eltnot
Casual
 
Posts: 13
Joined: Wed Jul 07, 2010 10:32 am
Location: North Brisbane, QLD, Australia

Re: Pressure Casting Equipment

Postby blind pig » Mon Dec 26, 2011 11:33 pm

Thanks for that!

Hmmmmm....Do I need a third one...... :oops:
blind pig
Junkie
 
Posts: 581
Joined: Fri Feb 19, 2010 2:41 am
Location: Brisbane Australia

Re: Pressure Casting Equipment

Postby Magnetic Duckling » Thu Mar 01, 2012 4:00 am

I see there is already this topic about pressure casting stuff so I figured I could use it instead of opening a new one.
I have noob questions about which machines I need because it is still confusing right now, too many figures...
Can I post my inquiries here ?
User avatar
Magnetic Duckling
User
 
Posts: 88
Joined: Thu Mar 01, 2012 3:39 am

Re: Pressure Casting Equipment

Postby Anvils Hammer » Thu Mar 01, 2012 6:20 am

yep, go for it.

AH
Anvils Hammer
Habit
 
Posts: 232
Joined: Fri Oct 07, 2011 8:58 am

Re: Pressure Casting Equipment

Postby Magnetic Duckling » Thu Mar 01, 2012 6:47 am

Soooo I wanna cast bubble free resin with bubble free silicon mold. Nothing new so far. I already know how to cast stuff but I still have annoying bubbles.
I read that you need 70/80 psi for silicon and 60 for resin, no idea but I tend to believe people who knows how it works.

I found the following machines :
http://www.abac-support.co.uk/individua ... 30_7_S.htm
http://www.spraydirect.co.uk/acatalog/1 ... tator.html
but it is still unclear. I vaguely understand that when it comes to transferring the air contained in the compressor tank into the pressure pot, the relevant information is the 3 cfm but I don't know what to do of it. Can you tell me how long it would take to fill the 10ltr pressure pot depending on the psi I want (granted I already let the compressor get filled beforehand) ?

Please don't tell me things involving gallons because I have no idea what it is, I only know the metric system ^^;
Also English is not my first language so please disregard mistakes as a lack of attention at school xD
Thanks \o/
User avatar
Magnetic Duckling
User
 
Posts: 88
Joined: Thu Mar 01, 2012 3:39 am

Re: Pressure Casting Equipment

Postby mangozac » Thu Mar 01, 2012 9:10 am

OK well for starters you don't need any higher pressure for the silicone than you need for the resin, since during casting the silicone will only be compressed tot he resin pressure anyway. That said, even for resin the higher the better.

Here's a good number for you: 28.3. To convert CFM to litres per minute just multiply the number by 28.3 ;)

The CFM of the compressor isn't all that important as you want a compressor with an air storage tank. The transfer rate between the tank and your pressure pot will be much higher. For the compressor you will want a tank size of at least double that of your pressure pot.

The compressor and pot you linked to are far, far overpriced! The compressor should be just a cheap one from an auto or hardware store, no more than 120 euros. The pressure pot should be a similar price (eBay?).

Here in Oz we are Metric too, but unfortunately many measurements involving pressure and air are still imperial. You just have to get used to it ;)
Oh yeah I can make that....
User avatar
mangozac
Resin Addict Collaborator
 
Posts: 4271
Joined: Fri Oct 16, 2009 3:40 pm
Location: QLD, Australia

Re: Pressure Casting Equipment

Postby Magnetic Duckling » Thu Mar 01, 2012 10:39 am

Thanks for your answer!
I know right, they are so expensive! I can't find anything significantly cheaper.. I did a lot of browsing and it seems getting this kind of product in the UK just plain sucks. I was thinking of going to browse around my neighborhood for compressors as those are more common in store than pressure pot.
Thing is I am in an apartment so I need a quiet one. We got thin walls ><;

Isn't silicon harder to get bubble-free because of its higher viscosity ? Anyway it doesn't matter much at this point. I know I need a high psi to do the job.

More noob questions :
Is the air transferring from compressor tank into the pressure pot or is it like, sharing the pressurized air between the two (I suck at explaining that in English). I hope that makes sense.

So ok 3 cfm => 85 ltr/min. I have a 10 ltr pot... but I assume it depends on the psi I am choosing to use so I still don't understand how to know how long the filling of the pot would take. I honestly try though ^^;

Or maybe girls should just stop playing with men machines xD
Please make me clever :)
User avatar
Magnetic Duckling
User
 
Posts: 88
Joined: Thu Mar 01, 2012 3:39 am

Re: Pressure Casting Equipment

Postby Fleafa » Thu Mar 01, 2012 10:59 am

I don't have much time to respond right now (& I'm shattered) but these are what I bought:
http://www.axminster.co.uk/axminster-10 ... prod21334/
http://www.amazon.co.uk/Wolf-Sioux-9-5c ... B004CRF9I0
Though I seem to remember getting the compressor cheaper than that...

As for quiet compressors... I think you'll end up paying considerably more. Mine is very noisy.
User avatar
Fleafa
Junkie
 
Posts: 835
Joined: Thu Jul 07, 2011 2:56 am
Location: Fareham, Hampshire, UK

Re: Pressure Casting Equipment

Postby blind pig » Thu Mar 01, 2012 12:09 pm

Magnetic Duckling wrote:Thanks for your answer!
More noob questions :
Is the air transferring from compressor tank into the pressure pot or is it like, sharing the pressurized air between the two (I suck at explaining that in English). I hope that makes sense.

I assume it depends on the psi I am choosing to use so I still don't understand how to know how long the filling of the pot would take. I honestly try though ^^;

Or maybe girls should just stop playing with men machines xD


When filling your pressure pot from the compressor tank, you start off slowly, otherwise you will move the content inside the pressure pot with a blast of compressed air.

It only takes me about 10-15 seconds to fill a 10 L pressure pot from my 40L compressor tank.

You open the tap between the compressor and the pressure pot and then close it when you have reached the pressure you need in the pressure pot.

If you leave the hose tap open between the compressor tank and the pot then you will equalize the pressure between them, but that will probably be more pressure than your pressure pot can handle!

Most compressors are NOISY! they only take 5-10 minutes to fill the compressor tank, so your neighbours will have to put up with a lot of noise for only a few minutes a couple of times a day when pressure curing silicone.
blind pig
Junkie
 
Posts: 581
Joined: Fri Feb 19, 2010 2:41 am
Location: Brisbane Australia

Re: Pressure Casting Equipment

Postby Anvils Hammer » Thu Mar 01, 2012 10:17 pm

Any 25L compressor will have no trouble at all filling a paint pot, timings are only important when you start messing with vacuum!

the equipment listed by fleafa will do just fine, but you can get a cheaper compressor on ebay-

http://www.ebay.co.uk/itm/25L-Direct-Dr ... 3f11730ec2

cant find the one I bought anymore but I paid £90 including postage.

Pressure of 3 Bar (45PSI on the dial) will be good enough for both silicone and resin, and its highly unlikely you will get a pressure pot rated for more than that!

You wont find a quite compressor.. talk to your neighbours and find out when they are at work!

AH
Anvils Hammer
Habit
 
Posts: 232
Joined: Fri Oct 07, 2011 8:58 am

PreviousNext

Return to Advisory

Who is online

Users browsing this forum: No registered users and 1 guest

cron