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Protecting One's Assets

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vtsteam:
I don't know Andrew, but sub freezing  sand would be unpleasant. Warm properly tempered greensand is a pleasure to work with. For small or thin parts, chill is also a factor in filling the mold well.

I'm thinking of something , low wattage, with, say, a 24 hour timer that I could turn on the night before molding. But you'd want it to be safe enough to trust unattended.

I've got an old unused portable cooler/ice chest that I could store the sand in. It would only take minimal wattage to  warm it up overnight. But what to use?

awemawson:
A zig zag of copper tube, or (to prevent corrosion) a coil of plastic heating pipe, with water from your clone Lister engine circulating through it under the sand ?

RussellT:
If it's one of the portable coolers based on a Peltier device I think you could just reverse the polarity to make it a heater - you might need some way to distribute the heat away from the device.

Russell

vtsteam:
No Russell, it's just an ice chest.

Maybe something like this?

http://www.amazon.com/Hydor-25w-Hydrokable-Substrate-Heater/dp/B0006JLPGI

steampunkpete:

--- Quote ---No Russell, it's just an ice chest.

Maybe something like this?

http://www.amazon.com/Hydor-25w-Hydrokable-Substrate-Heater/dp/B0006JLPGI
--- End quote ---

That Substrate heater looks like the kit for the job; I wish I had known about these.

If Russell has got a nice chest I would refrain from mentioning it - that sort of post could get you into trouble!

 :)

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