Correction of mould cavity geometry for warpage compensation

Warpage is one of the most challenging defects occurring in plastic injection moulded parts. Various approaches to overcome this issue have been proposed literature, but they all provide only partial solutions problem. This paper proposes a new method for compensation and minimisation warpage. The based on Mould Cavity (MC) correction. In contrast other similar methods, here MC correction accomplished through direct comparison local deviations warped part’s geometry desired part. Modifying shape accordingly yields parts with lower discrepancy from compared nonadjusted shape. key novelty development software that iteratively adjusts minimise deviations. every iteration, part order compute between both geometries. Computation done first by determining point normal vector mesh its piercing mesh. Second, distance base calculated. After are determined, adjusted accordingly. Two case studies demonstrate method’s capabilities. we present curved thin-walled plate maximum warpage value 0.005 mm (0.7% initial warpage) was reached after three iterations remained stable afterwards. second tested box-shaped dropped 0.711 0.066 iterations.