Patent ID: 6585505
Filing Date: 2003-07-01
Classification: B29C,D01F

Abstract:
In an injection molding machine having at least one nozzle for delivering melt material from a manifold to a mold cavity, apparatus for controlling delivery of the melt material from the nozzle to the mold cavity, the nozzle having an exit aperture communicating with a gate of the cavity of the mold and being associated with an actuator interconnected to a melt flow controller, the apparatus comprising: a sensor for sensing a selected condition of the melt material through the nozzle; an actuator controller interconnected to the actuator, the actuator controller comprising a computer interconnected to the sensor for receiving a signal representative of the selected condition sensed by the sensor, the computer including an algorithm utilizing a value corresponding to a signal received from the sensor as a variable for controlling operation of the actuator; wherein the actuator is interconnected to and controls movement of a pin having an axis slidably mounted in a channel leading to the gate for back and forth movement of the pin through the channel; wherein the melt flow controller controls the rate of flow of the melt material at different rates according to the algorithm at a position spaced upstream of the gate.