Study on warpage of CD & DVD discs substrate by injection molding process

Tóm tắt

This research investigated the optimization of injection molding parameters for the minimum warpage of CD & DVD disc substrate of Polycarbonate (PC). CD & DVD disc substrate was first designed by Pro/E 5.0. The Moldflow Plastics Insight 6.1 is used to mesh and simulate the warpage. In order to find out recommended parameters, the study used Taguchi technique in decreasing warpage of CD & DVD substrate. Parameters or factors employed are mold temperature, melt temperature, packing pressure, packing time, and cooling time. An ANOVA table was used to examine the significance of parameters. Results of variance analysis show that packing time is considered as the most significant parameter for the minimum warpage of CD & DVD disc substrate. Cooling time and mold temperature are found as the second and third most significant parameters in this study. The recommended parameters were established and then verified by the injection molding simulation and the minimum warpage obtained was 0.1627mm.