Abstract: An apparatus for controlling the rate of flow of fluid mold material from an injection molding machine to a mold cavity, the apparatus comprising: a manifold having a delivery channel that delivers fluid material to a first gate; an actuator interconnected to a valve pin having a tip end drivable along a drive path, the actuator and the valve pin being translationally driven at a controllable rate of travel by a valve system comprised of a source of valve drive fluid that pumps the drive fluid at a maximum drive rate, a first valve interconnected to the source that is selectively adjustable to adjust rate of flow of the drive fluid from the source to a selected less than maximum drive rate and a second valve controllably movable between a first position and a second position.

Abstract: An apparatus for controlling the rate of flow of fluid mold material from an injection molding machine to a mold cavity, the apparatus comprising: a manifold having a delivery channel that delivers fluid material to a first gate; an actuator interconnected to a valve pin having a tip end drivable along a drive path, the actuator and the valve pin being translationally driven at a controllable rate of travel by a valve system comprised of a source of valve drive fluid that pumps the drive fluid at a maximum drive rate, a first valve interconnected to the source that is selectively adjustable to adjust rate of flow of the drive fluid from the source to a selected less than maximum drive rate and a second valve controllably movable between a first position and a second position.