An injection molding apparatus and an method for the manufacture of moldable articles having an injection manifold, a plurality of hot runner nozzles, a first nozzle heater, a plurality of mold cavities positioned to receive molten material from the plurality of the hot runner nozzles, each mold cavity having at least one mold gate orifice and a mold cavity heater surrounding each mold cavity at least partially and a thermocouple associated with the mold cavity to measure directly or indirectly a temperature generated by the mold cavity heater.