An injection molding die for a mold for fabricating a plastic filter component including a net, at least one supporting rib, and a frame. The molding die includes a plurality of net grooves including a first set of net grooves and a second set of net grooves intersecting at least some of the first set of net grooves. The plurality of net grooves are for receiving plastic for forming the net of the plastic filter component. At least one rib groove is contiguous and in flow communication with at least some of the net grooves. The at least one rib groove is deeper than the net grooves and is for forming the at least one supporting rib subdividing the net into at least two portions. A frame cavity around the net grooves is in flow communication therewith, for receiving plastic for forming the frame. At least one damming device extending into the mold and located to act as a restriction for controlling plastic flow therepast and into at least some of the net grooves.