Cooled electric actuator controlled injection

An injection molding system (1000) comprising:an actuator (5) having a housing (20) comprised of radial (20r, 20ri, 20ro, 20roa, 20rob, 20roc, 20rod) and axial walls (20a, 20ai, 20aue, 20ade) that form an enclosed chamber (45) containing a heat conductive chamber fluid (CF),a rotor and driver driven by electrical energy and supported within the chamber by the radial and axial walls,wherein one or more of the radial and axial walls comprise a heat conductive material that has an inner surface disposed in heat conductive contact with the heat conductive fluid (CF) contained within the enclosed chamber,an actuator tube or channel (25) disposed within the one or more of the radial and axial walls,a source (260) of heat absorptive fluid (25f) sealably interconnected to the actuator tube or channel (25).