VALVE STEM CONTROL SYSTEM

摘要

Disclosed is a valve stem control system, comprising a stem actuation plate connected to a plurality of valve stems, the stem actuation plate controlled by a pneumatic pressure; a sensor to measure a characteristic associated with the stem actuation plate; a proportional valve for controlling a supply of air for the pneumatic pressure; and a servo pneumatic controller coupled to the sensor and the proportional valve, the servo pneumatic controller for controlling the proportional valve in response to the measurement from the sensor. The valve stem control system can operate in connection with an injection molding machine.