CPC B29C 48/30 (2019.02) [B29C 48/92 (2019.02); B29C 2948/926 (2019.02); B29C 2948/92571 (2019.02); B29C 2948/92647 (2019.02); B29C 2948/92904 (2019.02); G05D 5/02 (2013.01)] | 18 Claims |
1. A method for regulating an extrusion process, the method comprising:
continuously and in real-time, during a current extrusion cycle,
obtaining a first thickness at a first position along an extrudate as material is extruded through a die gap of a die;
comparing the first thickness with an expected thickness of the extrudate at the first position to obtain a value for an error, the expected thickness modeled in real-time using a size of the die gap as input and by applying a linear system with non-minimum phase dynamics and a unity DC gain; and
varying the size of the die gap used in the current extrusion cycle when the error exceeds a threshold to compensate for the error.
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