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Posted by Scott Reigel on September 15, 2025, 15:02:01, in reply to "Re: I suggest a 1 piece mold and...."
I agree with everything David says, although he's a better caster than I am (and I don't produce at scale), so I typically use 310 to maximize pot life. A one piece mold is all you need.
If you're pressure casting, bubbles will likely take care of themselves but it is rewarding to poke them out all the same. I can't tell the difference between the ones I poke and those I don't.
A lifetime supply of vents is a very good thing.
-Scott
Previous Message
Thank you David! I’ll give it a go and see how it comes out.
Cheers
Bob P Previous Message
Hi Bob, I'm assuming you're talking about Gooseneck type vents.
I'd suggest Mold Max 10 for ease of molding and good flexibility for pulling the parts out of the mold.
The way I do it is having the vents standing up (vertical) and mounted on a runner about 3/16" square. Make the mold about twice or 2 + 1/2 as wide as the runner. You want it thin enough you can squeeze the finished mold to compress the cavities that are the vents.
To make the parts, put a toothpick down the hole of the vents, pour the runner full, then pullout the tooth pick. The resin is then forced down the hole by air pressure against the vacuum caused by the toothpick being pulled out. Then pinch the mold at the bottom to force any remaining air out of the vent cavity.
I use the Smooth On 305 resin to give enough time to get it done.
Hope This helps, David @ Loose Cannon East
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