Reply to thread

This makes an interesting thermodynamics problem if one estimates the Rth of each outer layer of insulation and the inner mold from surface to core center of mass.  But one needs to know the max. mold gradient or thermal rate of change before thermal stress becomes destructive.  This may require experimentation.

There will be an air thermal gradient away from the heat source and gravity without an air stirrer. Does this thermal mass time constant matter from bottom to top in air and from surface to core?  This depends on the conductive resistance and thermal mass time constant.  With a Kd derivative gain factor or "look ahead value", you can prevent overshoot of the surface temp. and if desirable, reduce and optimize bake time.

But if your proportional rate for temp is much slower than the thermal mass time constant, the overshoot error can be minimized with proportional control.