rotational molding
Quick Summary
Rotational molding is a manufacturing process used to create hollow plastic articles. In this technique, a split mold is partially filled with a liquid plastisol or a fine polymer powder. The mold is then rotated and heated, causing the liquid to form a continuous film on the mold's interior surface or fusing the powder into a film. After cooling and opening the mold, the hollow product, such as toys like balls and dolls, can be removed. This method is a type of plastic forming, which generally involves melting, shaping, and solidifying the material.1
Ask Britannica AI about this topic
Britannica doesn't have a full article on this topic, so we've curated a list of our relevant coverage.
