rotaatiovalanta

Rotaatiovalanta, also known as rotational molding or rotomolding, is a high-temperature, low-pressure plastic forming process. It is used to produce hollow plastic parts by heating a mold containing a powdered plastic material. The mold rotates on two axes simultaneously, distributing the molten plastic evenly along the mold walls. Once the plastic has solidified, the mold stops rotating, and the part is removed.

This manufacturing technique is suitable for creating large, complex, and hollow items such as tanks, kayaks, playground equipment, and industrial containers. The process is characterized by its low tooling costs compared to other plastic molding methods, making it cost-effective for both short and long production runs. Rotaatiovalanta can produce parts with uniform wall thickness and excellent surface finish.

The primary materials used in rotaatiovalanta are polyethylene (PE), polypropylene (PP), and nylon. The process involves several stages: charging the mold with powdered plastic, heating and rotating the mold in an oven, cooling the part, and finally demolding. Because it operates at low pressure, it is ideal for producing parts with minimal internal stress. The simplicity of the process allows for design flexibility, enabling the creation of intricate shapes and integrated features.