Plastics processing method and apparatus
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United States of America Patent
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Jul 12, 2016
Grant Date -
Jan 12, 2012
app pub date -
Jul 8, 2011
filing date -
Jul 8, 2010
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Abstract
A method for additive delivery during a plastics processing is disclosed. The method includes establishing a network of components in a control loop that uses a feedback method to drive at least one pump, thus enabling continuous, robust proportioning of additive in a difficult to control environment. The feedback method includes sending at least one signal from at least one sensor associated with a plastics melting machine to a controller, sending one or more signals from the controller to the at least one pump, monitoring the pressure in the at least one pump and sensing the position of an injection nozzle valve, and sending one or more signals to the injection nozzle valve instructing the valve to open or close.
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