Casting long cooling fins in petrobond

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Bramblebush


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Posted by Lyle Landstrom on January 03, 19100 at 14:59:21:

Hi people,

Can anyone give advice for casting long 1 1/2 in deep fins at 1/2 inch spacing in petrobond. Is there a sand wash I can spray on to harden the sand after baking. ie, mollassis and water?

Currently, there's not enough hot strength. The castings shake out and the fins are all cobbled up from the sand collapsing after I pour the metal. I'm pouring aluminum at 1375 - 1400 degrees.

I can go to other types of sands but I want everything in my heap to be compatable.

Any help would be appreciated.


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