FAST ACTING REDUCED VELOCITY PIN CONTROL

摘要

Apparatus and method for performing an injection molding cycle comprising: a manifold, a pneumatic actuator driven by a pneumatic valve assembly, the actuator driving a valve pin between a gate closed position and a maximum injection fluid flow position, the pneumatic valve assembly having a spool supported within a cylinder in a manner enabling driven translational movement within the cylinder, a controller that instructs the pneumatic valve assembly to drive the valve pin either upstream or downstream at one or more selected reduced velocities relative to a maximum.