The study of the plastic cover mold design and process optimization based on Moldflow

摘要

In this paper, according to the quality problems of the plastic cover such as the difficulty control of the mold temperature, long cooling time, low production efficiency and deformation, it analyses the problems existing in the mold causes and find solutions based on Moldflow as a research tool. By improving the quality of gate position to control the filling quality, redesigning the cooling system to improve cooling efficiency, optimizing molding process to control product quality and increasing wall thickness to eliminate air traps and weld lines guide the design and manufacturing of the new mould. It establishes the gating system and cooling system based on the ASA778T as filling material and the analysis of simplified model. Select the process: the mold surface temperature is 80°C, the melt temperature is 240°C, the mold-open time is 15s, the packing time is 10s, the packing pressure is 80Mpa, injection+packing+cooling time is 45s. This process reduces the molding cycle from 65s to 42s, decreases the maximum deformation in 2.866mm, ensures the product quality, saves the cost and improves the production efficiency.