I did that in college class. The one warning I have is if there is a flaw, even a tiny one, it will show up exactly as y9ou see it on the polystyrene. Also, apparently, there are two types: one very poisonous which will melt or disolve with a bit of gasoline poured on it, so easy to detect. and the other which is far less poisonous. Other than these probs, the stuff is EASY to work with, I mean, the stuff can come out to 5-10 thou if you are careful. When I get around to foundry work, this technique will be a number one for me to use.That's really neat! Did you carve those blades freehand? Lost polystyrene is one of the things I have not tried yet in my home casting adventures. The museum where I volunteer needs a thermostat body for an old Gardner diesel engine - it's a very odd shape and I can't work out how to do it with a conventional pattern. That might be an interesting way forward.
Don,Teeleevs:
It looks like you're doing lost foam casting in greensand, is that correct? If you haven't been there yet, you might want to check out thehomefoundry.org. They've got a forum devoted to lost foam casting. It might make things a little easier for you. I'm amazed at some of the stuff that Kelly has cast with lost foam on that forum, his username is Al203. There are many tricks that you can use to get some outstanding surface quality.
Don
Try contacting an administrator there and explain what's going on. Otherwise PM me and I'll contact an administrator there and tell them about your problem.
Don
Thanks Don, I tried a couple of different ways but thehomefoundry.org gave me a message that it was a dangerous site? Couldn't think that was right.Teeleevs:
It looks like you're doing lost foam casting in greensand, is that correct? If you haven't been there yet, you might want to check out thehomefoundry.org. They've got a forum devoted to lost foam casting. It might make things a little easier for you. I'm amazed at some of the stuff that Kelly has cast with lost foam on that forum, his username is Al203. There are many tricks that you can use to get some outstanding surface quality.
Don
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