Research on intelligent control of thin-walled plastic parts forming quality based on CAE and DOE technology

In the injection molding process of thin-walled plastic parts, many process parameters have great influence on warpage. It has become an important means to control and optimize the injection molding process parameters and improve the molding quality by means of computer-aided technology and orthogonal test. In this paper, the upper cover part of a certain type of display instrument is studied. SolidWorks 2012 software is used to model it, and moldflow 2012 software is used to create pouring system and cooling system. The orthogonal experiment is designed by combining CAE and DOE technology. The appropriate orthogonal experiment table is selected. The mold temperature, melt temperature, packing time and packing pressure are taken as experimental factors. Through the simulation experiment, the conclusion of influencing factors is obtained, that is, packing time > mold temperature > melt temperature > packing pressure. At the same time, the optimal combination of process parameters was determined, that is, the melt temperature is 250°C, the mold temperature is 30°C, the packing pressure is 90 MPa, and the packing time is 8s. The optimal process combination simulation experiment results show that the warpage deformation is 0.2960mm, which is 25.29% lower than the previous minimum deformation, which effectively reduces the warpage deformation of thin-walled plastic parts and improves the forming quality of the upper cover of the display instrument.