Rotomolding is often used for parts that require high-quality finishes, uniform wall thicknesses, and high stability. Features such as inserts and spin weld attachments can be incorporated directly into the rotomold and foaming can be used to create thermal insulation and stiffness. Unlike competitive processes such as blow molding and thermoforming, rotomolding produces no pinch-off seams or weld lines, resulting in a finished product without the use of secondary processes.http://www.rotomoldingchina.co....m/rotomolding-machin