Patent ID: 6287107
Filing Date: 2001-09-11
Classification: B29C,Y10S

Abstract:
In an injection molding machine having first and second nozzles for delivering melt material from a common manifold to one or more mold cavities, apparatus for controlling delivery of the melt material from the nozzles to the one or more mold cavities, each nozzle having an exit aperture communicating with a gate of a cavity of a 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 at least one of the nozzles;an actuator controller interconnected to each actuator, at least one actuator controller comprising a computer interconnected to the sensor, the computer 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 an actuator for the at least one nozzle;wherein at least one of the nozzles has a seal surface disposed on a tip end of the nozzle which is engaged and in compressed contact with a complementary surface surrounding the gate of a cavity of a mold, the engaged surfaces forming a seal against leakage of the melt material around the nozzle.