High-barrier environmental protection plastic production line collaborative optimization system based on digital twinning

Abstract

The application discloses a high-barrier environment-friendly plastic production line collaborative optimization system based on digital twinning, and relates to the technical field of high-barrier environment-friendly plastic production control.The system collects the temperature control sequence of the co-extrusion cylinder and the screw rotation speed array, analyzes the melt conveying track in combination with the screw groove geometric characteristics, generates a dynamic history matrix of the cumulative amount of heating and shearing; based on the die flow channel topology, the dynamic history matrix is substituted into the non-Newtonian constitutive equation to perform rheological field mapping, the viscosity step barrier and shear stress gradient of the interface grid are quantified, and the stress overshoot is extracted when the interface sliding critical phase is crossed; the stress overshoot is mapped as a predictive control cost constraint, a sensitivity matrix is constructed relying on the heat transfer coupling relationship, and the temperature and screw rotation speed adjustment parameter sequence of the extruder cylinder are inversely solved; the heat distribution is previewed in the twin space and the residence temperature peak value is extracted, the temperature fine adjustment amount is executed amplitude clipping when the thermal decomposition critical point is crossed, and the traction roller linear velocity gain command is solved according to the uncompensated residual value and is synchronously issued and executed.

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