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epoxy casting trouble
Posted: Mon Dec 12, 2011 12:12 pm
by lklaussen
Well looks like I have a question for JSR.. but anyways what is the best way to release epoxy from the mold for making a vortex block?
Posted: Mon Dec 12, 2011 12:21 pm
by jrrdw
I'm guessing...Powder the mold, silicon spray maybe.
Posted: Mon Dec 12, 2011 3:23 pm
by Gun Freak
You have to lubricate the mould before pouring so it can slide out.
Posted: Mon Dec 12, 2011 3:30 pm
by lklaussen
What lubrication works? I tried cooking spray, couldn't get it out yesterday.
Posted: Mon Dec 12, 2011 5:55 pm
by Gun Freak
Vaseline might do the trick...
Re: epoxy casting trouble
Posted: Mon Dec 12, 2011 6:00 pm
by dewey-1
lklaussen wrote:Well looks like I have a question for JSR.. but anyways what is the best way to release epoxy from the mold for making a vortex block?
It would help to know what the mold is made of?
There are actual mold release compounds.
Posted: Mon Dec 12, 2011 6:31 pm
by Technician1002
Most mold release compounds are wax based. I've seen car wax, candle wax, and ski wax used as inexpensive alternatives.
Posted: Mon Dec 12, 2011 6:34 pm
by Hawkeye
Meguiar's car wax is more or less the same as their mold release wax. Multiple coats polished to a gloss will let epoxy pop out of a mold with a little encouragement.
Posted: Mon Dec 12, 2011 6:55 pm
by dewey-1
Technician1002 wrote:Most mold release compounds are wax based. I've seen car wax, candle wax, and ski wax used as inexpensive alternatives.
All the encapsulation or potting compounds that I had used on molds typically worked the best with a mold release that contained some PTFE.
Similar to this;
http://www.kpg-industrial.com/products/ ... d_release/
This was of course in a production environment where quality of the product was a major concern. The molds were typically made out of materials like nylon, delrin or polyethylene.