Patent ID: 7413432

Claim:
An injection molding apparatus comprising: an injection molding manifold heated by a manifold heater; a mold plate having a well where the mold plate is separated from the manifold by an air space; a mold gate communicating with a mold cavity; an injection nozzle seated in the well and located between the manifold and the mold gate, the injection nozzle having a nozzle body with a nozzle melt bore having a longitudinal axis; an electrical resistive heater fixed to the nozzle body, the heater having a wire element wrapped around and along the nozzle body from substantially one end of the nozzle body to another end of the nozzle body, the electrical resistive wire being electrically insulated from the nozzle body; a first thermocouple having a wire positioned along the nozzle body, the first thermocouple wire being electrically insulated from the nozzle body; and a second thermocouple having a wire positioned along the nozzle body, the second thermocouple wire being electrically insulated from the nozzle body, wherein the first and second thermocouples are fixed to the nozzle body and are disposed adjacent the electrical resistive heater to control the temperature of the nozzle provided by the electrical resistive heater.