Rotational molding, also known as rotomolding, is a time-honored plastic forming technique. It is reported that as the core technology of rotational molding, it may have originated from the production of the Terracotta Army in the Qin Dynasty of China. However, as a plastic process, rotational molding was born in the United Kingdom. The rotational molding patent was introduced in 1887. Commercial rotational molding machines were produced in 1934. By the 1950s, Europe had made significant progress, and the technology gradually spread to the United States, Japan, and other regions. Initially, it was just a supplement to injection molding and blow molding processes. With the maturation of polyethylene powder technology, it has increasingly become a competitive molding method in the plastic forming industry. Since then, the rotational molding process has continued to develop globally. 1. International Situation and Development Trends In recent years, the rotational molding industry has been rapidly growing in developed countries in North America and Europe, with its growth rate exceeding the average of the entire plastic industry. The development of the entire rotational molding industry has also been quite comprehensive. In addition to rotational molding machine manufacturers and rotational molding product production facilities, there are numerous other specialized auxiliary factories, such as rotational molding mold manufacturers, release agent producers, rotational molding pigment producers, milling machine manufacturers, insert manufacturing factories, and mixed equipment manufacturers suitable for rotational molding, as well as a large number of suppliers of special rotational molding materials. The rotational molding equipment manufactured in developed countries is also becoming increasingly complex and is continuously evolving towards higher levels of automation and control.