Abstract: An injection molding machine valve gate nozzle having a rack driven valve pin actuator for moving the valve pin between open and closed positions during each holding cycle of operation. The valve pin actuator is sealed from the fluid flow stream and the nozzle body has a valve pin guide which substantially separates the melt stream from the valve pin during passage through the nozzle for enhanced long-term operation. The actuator has a modular construction which lends itself to economical manufacture and efficient use in multiple drop or single drop molding machines without modification.

Abstract: A hot runner nozzle for heating and directing a melt stream to a mold cavity. The nozzle includes a heated nozzle body having a longitudinal flow passageway with a tapered tip at a downstream end thereof. The tip has a plurality of internal transition passageways communicating between said longitudinal passageway outwardly through a side of the tip. The tip is formed with a plurality of external laminar flow passageways each communicating with a respective internal tip passageway and extending longitudinally in a downstream direction along the tapered tip for imparting a laminar flow to the melt stream as it approaches and is directed through the mold cavity gate.