Low Investment Rotational Molding Mold For Large Size PE HDPE PP Nylon Fittings

Low-Investment Rotational Molding Mold For Large-Size & Custom PE HDPE PP Nylon Fittings

Rotomolding also called rotational molding, entails filling a charge or shot weight of material into a heated hollow mold, followed by slowly rotating the mold, causing the softened material to disperse and adhere to the mold’s walls. The mold continues to rotate at all times during the heating phase to achieve and maintain an even thickness throughout the part. This rotation also prevents sagging, or deformation, during the cooling phase.

The distinct advantage of rotomolding is that it is an easier process than any other when producing large, hollow parts, such as oil tanks or chairs. Also, the molds used in rotomolding are significantly less expensive than different types of molds. Rotomolding generates much less wasted material; excess material can often serve for another usage, making it economical and ecological.

Another advantage lies in the molds themselves; they necessitate less tooling. Consequently, companies could put into production much faster than other molding processes. This is especially valuable for complex parts. Rotational molding is also the choice process for short runs and rush deliveries. The operator can exchange the molds quickly or use different colors without purging the mold. With other processes, purging may be necessary to swap colors.

The main drawbacks are the hard-to-reach areas in the mold and a long cooling duration that leads to significant mold downtime.