Effects of Polymer-Filler Properties on the Warpage of Injection Molded Automobile Door

摘要

The accurate prediction of warpage of injection molded parts is important to achieve successful mold design with high precision. In this study, effects of polymer-filler properties, such as filler aspect ratio (L/D), filler modulus parallel to major axis (El) and filler modulus perpendicular to major axis (E2), on warpage displacement of automobile door were studied quantitatively by experimental investigation and numerical simulation. The numerical results are in good agreement with the experimental measurements. It is also found that: (1) the thermal displacement decreases as El and E2 decrease, (2) the PVT displacement is not influenced by change of L/D, El and E2, (3) the orientation effect displacement is neglected small when L/D=l and El= E2, and it also increases as L/D and E1/E2 increase.