The basic process of rotational molding is simply to heat the powder or liquid polymer in the mold and the mold rotates and rotates around a vertical axis, then cools and takes shape.

At the beginning of the heating phase, if a powder material is used, then, a porous layer is formed on the surface of the die, then melts gradually with the cycle process, and finally forms the homogeneous layer with uniform thickness. If the liquid material is used, the flow and coating on the surface of the mould is first stopped when the gel point is reached.

The mould is then transferred to the cooling area, which is cooled by forced ventilation or water spraying, and then placed in the working zone where the mold is opened, the finished workpiece is taken away, and then the next cycle.