Patent ID: 9156198
Filing Date: 2015-10-13
Classification: B29C,B29K

Abstract:
1. An injection molding process, comprising: obtaining a previously-formed part; preheating a mold to a first temperature such that when the mold is at the first temperature, the mold does not cause distortion to the previously-formed part upon contact with the mold, wherein the mold includes a stationary injection mold with at least one sprue through which molding material enters, and a moveable ejector mold that is moveable relative to the injection mold; placing the previously-formed part into a cavity of the mold when the mold is at the first temperature; closing the mold about the previously-formed part; heating, after the closing, the mold from a the first temperature up to a second temperature; filling, while at the second temperature, the cavity with molding material such that the molding material contacts the previously-formed part; after the filling, maintaining, while at the second temperature, a holding pressure on the previously-formed part with first and second molding members of the mold; cooling the mold from the second temperature down to a third temperature that is lower than the first temperature; moving the ejector mold away from the injection mold as a finished part remains on the ejector mold, wherein the finished part including the previously-formed part and the injected molding material; and using ejector pins that are a part of the mold to eject the finished part off the ejector mold.