Abstract

The paper presents the results of application of CAD/CAE method for optimizing runners diameter of 16-pen-cup-cavity molds with unbalanced runners layout according to the Thien Long Company's requirement. The former mold has been unbalanced due to designing of unbalanced runners layout, machinning primary runners, secondary runners with equal diameters. The results of application of CAD/CAE method proposed the runners diameter to be modified for each secondary and primary runner separately in order to ensure a balanced runners system with minimuni runners volume. The results of product's injection implemented on the former and the modified mold showed the CAD/CAE method for optimizing runners diameter assured not only equal quality for all moulded products, decreasing resin consumption, but also noticeabbly decreasing injection cycle time and injection pressure.