How does rotomolding compare with injection molding and blow molding?
In comparison to injection and blow molding, rotational molding can easily produce both large, small precision and non-precision parts in a cost effective manner from a tiny medical bulb to a 16 foot kayak and up. Tooling for rotomolding is less expensive than injection molding because the process does not require any pressure to be held and rotomolding tooling is far less expensive than blow molding because there’s no internal core to manufacture. Since there is no internal core, minor changes can be easily made to an existing mold, enabling product enhancements and line extensions to be considerably less expensive to develop and faster to bring to market. In addition, Rotomolded parts are formed with heat and rotation, but not with pressure. Therefore, molds don’t need to withstand the high pressure of injection molding. Rotomolding also has a number of inherent design strengths, such as consistent wall thickness and strong corners that are virtually stress free. If additional streng
