Apparatus and method for proportionally controlling fluid delivery to stacked molds
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United States of America Patent
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Issued Date -
Sep 5, 2002
app pub date -
Mar 19, 2002
filing date -
Jun 13, 1997
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
In an injection molding machine having first and second nozzles for delivering melt material to first and second mold cavities of first and second molds respectively, apparatus for controlling delivery of the melt material from the nozzles to the mold cavities, each nozzle having an exit aperture communicating with a gate of a cavity of a respective 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, the actuator controller interconnected to the actuator associated with the at least one nozzle 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 the actuator for the at least one nozzle; wherein the first and second molds are mounted in stacked relationship in the machine and the melt material is delivered to the first and second cavities during a single injection cycle.
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