The rotomolding process is a thermoplastic hollow molding method, in which a powder or paste material is first injected into a mold, and the material is uniformly filled by gravity and centrifugal force by heating the mold and rolling in the longitudinal direction. The mold cavity is melted, molded into a desired shape, and then cooled to form a hollow product.

        Compared to other plastic molding processes, the rotational molding process has the following advantages:

        ① the mold is simple, low cost, suitable for molding large plastic products.

        ② suitable for the production of a variety of plastic products, rotomolding process has greater flexibility than other molding methods.

        ③ suitable for molding products with complex shapes.

        ④ saving raw materials. Rotational molding adds the raw materials directly into the mold each time, and after the molding is completed, the next required raw materials are added. It does not waste raw materials and does not require time to clean the machine and mold.

        ⑤ the product wall thickness is uniform, no seams. The rotomoulded product has a uniform wall thickness compared to other plastic molding processes. Because of the integral molding, the product has no fusion line.

        ⑥ the product has no residual stress and is not easy to deform.