Patent ID: 7261553
Filing Date: 2007-08-28
Classification: B29C

Abstract:
1. A crossover nozzle system for transferring molten plastic from a feeder manifold to a main manifold of the molding chambers of the stack molds of an injection molding machine, wherein the centerline of the molding chambers coincides with the centerline of the stack molds, the system comprising: a primary sprue bar in fluid communication with the feeder manifold; an aperture in the primary sprue bar, the aperture in fluid communication with the feeder manifold; a primary sprue bar extension adjustably connected with the primary sprue bar and an aperture in the primary sprue bar extension being in fluid communication with the aperture in the primary sprue bar; a floating sprue connected with the primary sprue bar extension; a primary sprue valve connected with the floating sprue and in fluid communication with the primary sprue bar extension; a secondary sprue located in the main manifold and connected with the floating sprue; a secondary sprue valve slidably located within the secondary sprue and in fluid communication with the primary sprue valve; an extension rod connected with the secondary valve for activating the secondary sprue valve; an extension rod activating cylinder having a piston connected with the extension rod; and an activating mechanism comprising a primary sprue valve activating cylinder which is coupled with the primary sprue valve and is configured for activating the primary sprue valve.