xiesurotomolding
https://www.xiesurotomolding.com/blog/roto-molded-vs-injection-molded.html
Introduction to Roto Molding
Roto molding, or rotational molding, is a manufacturing process used to create hollow plastic products. It involves heating plastic resin inside a mold, which is then rotated along two perpendicular axes. This ensures even distribution of the plastic, forming a uniform, hollow shape.