I will be reinforcing all castings with re-bar. As far as mold release, carnauba wax works with the melamine coating pretty well.This is awesome! What do you use for mold release? Is the melonite enough?
I agree about reinforcing those sides some more. They may bulge and become convex. How about a perimeter of angle iron?
R
I haven't seen such a thread but they make large rigid boat hulls under vacuum. over at this vid they are using a vacuum to degas before the pour of a granite sink.I have a pretty serious vacuum pump and have done some infusion composite stuff but consensus on the cnc zone monster thread is that the thickness of the piece and viscosity prevent large epoxy granite stuff from vacuum. I am going to pack the mold and vibrate. The mix should only be 12-14% epoxy
I haven't seen such a thread but they make large rigid boat hulls under vacuum. over at this vid they are using a vacuum to degas before the pour of a granite sink.the main thing I have seen from some people making test videos of such a thing is failure to apply a proper release agent to the mold itself. A combination of vacuum chamber and vibrating table is not a bad idea either. The vacuum is going to remove all of the trapped air. The vibrating table will help settle any clumped aggregate.
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