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Colonial Machine custom manufactured a series of single cavity injection molds for a client from the material handling industry. The 3D model of this finished product is displayed at left. Used to produce a polypropylene lid, the molds measured 41" x 30" x 15". The units also featured a hi-hard P-20 steel cavity and core, an ejector box, and an Incoe hot runner system. Meeting tolerances as close as .002", we combined our CNC machining, sinker EDM, and grinding operations to manufacture this part. This process included rough machining and finishing the cavity and core block, finishing the waterlines, and drilling all ejector pin holes. In addition, we blended all tool marks and used our advanced Charmilles sinker EDM technology to machine 14 different locations on this part. The core was provided a glass bead finish, while the cavity was given a textured finish. Fulfilling consumer specifications, Colonial Machine has manufactured a great number of this type of mold. Fulfilling our customer’s specifications, we finished the order of 4 molds and shipped to their facility in California within a 6 to 8 week turnaround time. All molds met with absolute customer satisfaction.