Patent ID: 7540989

Claim:
A method of injection molding, the method comprising: providing an injection molding apparatus comprising: a first mold comprising a first cavity surface, a second mold comprising: a heating plate comprising a first surface, a second surface facing away from the first surface, and at least one channel arranged in a body of the heating plate between the first and second surfaces, wherein the first surface comprises a second cavity surface opposing the first cavity surface, a plurality of heating extensions passing through the at least one channel and configured to generate heat for heating the heating plate, and a cooling plate comprising a cooling surface facing the heating plate; controlling the plurality of heating extensions so as to heat the heating plate; moving the heating plate relative to the first mold so as to form the molding cavity between the first and second cavity surfaces with or without additional surface; injecting a moldable material into the molding cavity; and moving the cooling plate relative to the heating plate so as to contact the cooling surface with the second surface of the heating plate.