an apparatus for injection molding plastics material has an injection unit for delivering a plasticized melt through a nozzle , a press unit for urging a mold together at a predetermined pressure , a mold mounted in the press unit and a programmable controller operably connected to the injection unit and the press unit for automatically controlling the operation of the apparatus for repetitively producing uniform articles . the mold has a stationary mold section and a moveable mold section . the press unit is adapted for reciprocating the moveable mold section between an open position and a closed position . the stationary mold section has a plurality of ports at pre - selected points . each port has a controllable gate for selectively opening and closing the ports for passing melt to a mold cavity until the melt fully occupies the mold cavity while controlling and minimizing melt lines formed when a flow of melt from one of the ports meets with a flow of melt from another of the ports .