Apparatus for utilizing an actuator for flow control valve gates

摘要

Injection molding apparati, systems and methods are provided for limiting forward valve pin movement during flow control. According to one embodiment, an injection molding apparatus is provided that includes an actuator, and a valve pin coupled to the actuator. The valve pin is adapted to open and close a gate to a mold, and to control a rate of material flow through the gate during an injection cycle. The actuator is further adapted to control the valve pin in a first range of movement in which the valve pin is adapted to control the rate of material flow and cannot close the gate, and to control the valve pin in a second range of movement which includes the valve pin closing the gate.