Why does the heat preservation aluminum roll bend when it is cooled?
[insulation aluminum] is actually aluminum sheet, commonly known as aluminum coil. When delivered, it can be flat or curly.
In recent years, because the iron sheet in the heat preservation industry does not have rust prevention effect, so now in the domestic aluminum sheet has fully replace iron sheet.
Insulation aluminum coil will appear when the cooling bending phenomenon, reason is generally under the conditions of air cooling, the heat transfer coefficient of the aluminum coil insulation parts in contact with the air were flat, but because the wall thickness or different shapes, different parts of the heat dissipation rate is not balanced, resulting in thick wall or hollow tube heat faster than the thin Department of slow, resulting in insulating aluminum roll cooling occurs to the hollow part or thick walled parts of the twists and turns of the phenomenon.
