Flow visualization of the gas-assisted injection molding process

Gas-assisted injection molding can effectively produce parts free of sink marks in thick sections and free of warpage in long plates. This research investigated the basic filling phenomena in a gas-assisted injection molding process with flow visualization. A high-speed video camera was used to record the mold filling phenomena of rectangular cavities with various arrangements of gas channels. The mold-filling phenomena are compared and guidelines for layout of gas-channel ribs are drawn. © 1997 John Wiley & Sons, Inc. Adv in Polym Techn 16: 175–183, 1997