I am looking for some advice on a project I am working on. I have designed a hydraulic press and my question is relative to the Aluminum heat platen and steel press plate. There is a 15" L x 6.69" W x .75" thick steel plate (A514 steel) with 15"Lx6.69W" and 10mm thick sheet of insulation underneath (Made from Mica) and a 15" L x 6.4" W x .75" thick Aluminum heat plate. My question is if i wanted to fasten these three plates together (Steel, Insulation and Aluminum) using a bolt in each corner, does this sound like a problem when you take into account the coefficient of thermal expansion between both materials. Also to mention the press is using a 25 ton cylinder, and Al plate will be heated to no more than 230 F.
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