To apply fuzzy theory in the control of weld line of plastic injection-molding

This study concerns the application fuzzy theory on the control of weld line positions of injection molded parts. The study utilizes the molding experiences of expert to construct a dialog way of if~then~ to set the fuzzy production rules. Then the rules are applied to an example case to the control of weld line position by adjusting gate location and part thickness. The present algorithm not only succeeds in such application but also reduces the simulation time by try and error resulting in speeding up the mold design process