Importance

Loading Importance Indicators...

Abstract

A simple and efficient process and automated system is provided for controlling the mixing of polymeric material and additive materials in an internal mixer to provide quality products and batch to batch product uniformity. Real time mixing temperature profiles of a plurality of good quality batches of the same product are developed. The profiles are then superimposed or averaged to produce a real time temperature curve with maximum and minimum temperature tolerance limits, thus providing a range of batch temperatures that are allowable in real time during the mixing cycle. A process control system is programmed to store the range of allowable temperatures and to signal a mixer control to change at least one of the rotor speed and the ram pressure when the real time batch temperature falls outside the reference temperature range for a predetermined period of time.

Loading the Abstract Image...

First Claim