Sometimes it just doesn't work out

[RetiredJake]

I have been casting alumilte for a few months. Wanted to try the ResinSaver molds, so I ordered one to have a go at it. The attached picture shows how much resin I had to drill out of the tubes. Good mold, just doesn't work very well with pressure casting, which I need to do to keep the bubbles out of the alumilite. I reduced the pressure from my normal 65psi to 25psi in anticipation of possible leakage, but it just wasn't enough to prevent it. Guess I need to look into using some PR ocasionally.

Where/who carries PR in quantities suitable for the hobbiest caster?

TIA
Jake

 

[TerryDowning]

Alternately, fill the tube with plumber's putty, dental wax, or dowel.
Just push out the material with an appropriate size dowel when finished.

 

[MartinPens]

I didn't think the resin saver molds were made for pressure. Just PR pours. I could be wrong.

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[jmbaker79]

Most craft stores carry pr by the quart or gallon. Michaels, a.c. Moore etc carry castin craft clear pr. With a 20% coupon it's not half bad.

 

[RetiredJake]

I didn't think the resin saver molds were made for pressure. Just PR pours. I could be wrong. /

That was the point, they don't work well for pressure casting. Where can I get some PR ?

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[mtassie]

I made a mold out of corian to go around my resin saver and was able to cast under pressure.

 

[navycop]

I didn't think the resin saver molds were made for pressure. Just PR pours. I could be wrong.

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PTownsubbie uses pressure for his molds. I think he uses PR (silmar 41).

 

[socdad]

I have been casting alumilte for a few months. Wanted to try the ResinSaver molds, so I ordered one to have a go at it. The attached picture shows how much resin I had to drill out of the tubes. Good mold, just doesn't work very well with pressure casting, which I need to do to keep the bubbles out of the alumilite. I reduced the pressure from my normal 65psi to 25psi in anticipation of possible leakage, but it just wasn't enough to prevent it. Guess I need to look into using some PR ocasionally.

Where/who carries PR in quantities suitable for the hobbiest caster?

TIA
Jake

Try US Composites … Silmar 41 Clear Polyester Casting Resin.
http://www.uscomposites.com/polyesters.html
I purchase a gallon at a time, but it can be a pain to pour small amounts. For a couple of bucks they will send an empty quart container …

 

[Turned Around]

I get mine from Hobby Lobby. Pretty cheap, haven't had an issue with it yet.

And don't forget the catalyst.

 

[corian king]

Fred(PTownsubbie) uses silmar 40 which can be purchased here local.
I use the silmar 41 from US composites.There is not much difference between the two.

 

[pensbydesign]

i found with mine if i use pressure i had to put pressure on the end of the mold pushing in on the tube with a small clamp . tape works by wrapping it around over the mold but is a wast of tape, clamp can be reused.

if you warm the resin and let it gas of before you mix, i don't have to use any pressure and get no bubbles

 

[RetiredJake]

if you warm the resin and let it gas of before you mix, i don't have to use any pressure and get no bubbles

Are you using Alumilite, or some other resin?

TIA
Jake