ACTUATOR COOLING APPARATUS AND METHOD

An injection molding apparatus comprises a clamp plate mounted to a mold， a manifold， an actuator comprising a housing body， and a cooling device that cools the actuator. The cooling device comprises: a heat transmitter comprising a distal member and a proximal member mounted in heat conductive contact to the body. The distal member comprises a rod disposed within a bore in the proximal member. An exterior surface of the rod is slidably engaged in thermally conductive contact with and against an interior surface of the bore. The rod transmits heat from the proximal member to the distal end surface via engagement of the exterior surface of the rod with the interior surface of the bore. The clamp plate， mold， manifold， actuator and heat transmitter are assemblage together in an arrangement wherein a distal end surface of the rod is urged into compressed engagement with the clamp plate. Also provided is a method of cooling an actuator in an injection molding apparatus.