The subject invention relates to a precision injection molding of multi-piece parts and the subsequent handling and assembly of those parts produced from the mold. In an exemplary embodiment, a surgical suture package with a top part and a bottom part is molded and assembled. In such a method and system, the top parts and bottom parts are first molded utilizing a family mold and then are transferred to a stacker. The stacker is able to stack the top part and bottom part on top of one another on a pallet. The parts are then transported to a welder in order to weld the top part and bottom part together. The completed surgical suture packages are then transferred to a magazine for storage and shippage.