Injection molding apparatus and method for automatic cycle to cycle cavity injection
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United States of America Patent
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Dec 29, 2020
Grant Date -
Jan 25, 2018
app pub date -
Oct 4, 2017
filing date -
Jul 20, 2016
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Abstract
An injection molding system comprising:
- a first selected valve,one or more downstream valves, delivering a fluid to a mold cavity,at least one fluid property sensor that detects a flow front of fluid material flowing downstream through the mold cavity at a trigger location within the cavity disposed between the first gate and at least one selected downstream gate,a controller instructing an actuator associated with the downstream gates to open the gates at a predetermined open gate target time on a first injection cycle,each valve associated with a position sensor that detects opening of a gate at an actual open gate time to the controller,the controller automatically adjusting time of instruction to open the gates on a subsequent injection cycle by an adjustment time equal to any delay in time between the predetermined open gate target time and the actual open gate time.
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