Patent ID: 6494706
Filing Date: 2002-12-17
Classification: B29C,B29D,Y10S

Abstract:
A injection mold for molding a plastic article, the mold comprising: a cavity element and a core element which together define a space in which said plastic article can be molded, a portion of the cavity element defining a first surface of the molded article, the cavity element and core element being separable from each other subsequent to each injection cycle to permit removal of each article molded between the cavity element and the core element, a core pin movably located in the core element and having a proximal end defining a second surface of the molded article and a distal end, a core pin holder block coupled to the distal end of the core pin, a ball screw coupled to the core pin holder so that rotation of the ball screw causes movement of the core pin holder block to adjust the position of the core pin relative to the core element, a ball screw end cap fixed to the core pin holder block and engaging the ball screw, a ball screw nut fixed to an outer surface of the mold so that an outer end of the ball screw passes through the ball screw nut to a location outside the mold, and a core pin motor coupled to the ball screw for rotating the ball screw so as to adjust a thickness dimension of the molded article between the first and second surfaces.