aluminum rotational mold is made for the fan shell,economic cost,short lead-time, ... It is a aluminum rotational mold for the plastic fan shell,made by CNC process.Aother part of the mold ... see below: The advantages of our rotational molding:1) rotational mold for ... sample, we can make a new mould then make products for you. Design software can be UG ,PROE ,CAD, ...