Rotational molding is a manufacturing process with considerable market applicability. The rotational molding process involves first adding plastic raw materials to the mold, then continuously rotating the mold and heating it continuously. This allows the plastic raw materials inside the mold to gradually evenly distribute and adhere to the entire surface of the mold cavity under the action of gravity and heat, forming the desired product shape, and then cooling and shaping to produce the finished product. Compared to other mold processes, the rotational molding process provides us with more imagination space, which leads to corresponding design space. That is to say, as long as we follow the correct design philosophy, we can combine several parts into a complete mold, which greatly reduces the cost of production. With the continuous development of the rotational molding process, the types of rotational molds are increasing. The rotational molding process has been applied in transportation, traffic safety equipment, entertainment industry, river and waterway dredging industry, construction industry, and so on.