Design of the cooling channels in nonrectangular plastic flat injection mold

The complex variables and parameters with respect to the design of cooling channels in, nonrectangular plastic flat injection mold are investigated. Vector and simple mathematical calculations were used to solve problems related the deployment of cooling channels caused by different geometric dimensions of molded products. Furthermore, the basic geometry characteristic surface symbols and database were established. Next, the basic geometry characteristic surface was used to compose and present the shapes of molded product on the basis of a rectangular plastic flat. The conversion concept of equivalent area was also introduced to simplify the selection of model and deployment of cooling channels for nonrectangular plastic flat containing milder changes in shape. The optimization of cooling time in the first stage is based on the energy balance. A concise formula was used, with empirical algorithm. as the constraint of optimization design, to locate the optimal cooling time and the required optimal geometric factor constraints. Then, the optimization of channel deployment was derived to achieve the requirement of fast and uniform cooling of the mold. The method proposed in, this paper is capable of handling a nonrectangular plastic flat product through the conversion to an equivalent rectangular area. This method simplifies the channel deployment problem of a molded product caused by nonuniform distribution of heat source and reduces the instances of trial and error. Furthermore, the method proposed for the system framework is capable of completing the optimization faster than conventional finite difference method, which saves the time spent in designing the cooling channels and achieves fast and uniform cooling of finished products.