Valve gate mechanism for injection molding

In an injection mold assembly of the type including a batten plate, a manifold standoff plate and a mold end cap coupled together as a structural unit and a separate manifold runner mounted for relative movement within a recess in said manifold standoff plate, a gate valve, said gate valve comprising a nozzle mounted in said end cap and said manifold standoff plate and having a sliding interface with said manifold runner, said nozzle having a discharge orifice, a passage formed in said nozzle and extending from said sliding interface for delivering moldable material to said orifice, a valve member for closing said orifice, said valve member including a valve stem, guide means mounting said valve stem for longitudinal reciprocatory movement relative to said nozzle and in sealed relation relative to said passage, an actuator for positioning said valve member, said actuator being carried by said batten plate, a valve stem passage through said manifold runner, and said valve stem freely extending through said valve stem passage to said actuator.