Closed loop blank mold temperature control system and method

摘要

A closed loop blank mold temperature control system and method for use in the operation of an I.S. machine is disclosed for automatically adjusting machine timing to maintain desired blank mold temperature/heat extraction. The closed loop blank mold temperature control system uses measured blank mold temperatures to automatically control the supply of coolant air to the blank molds, which may be done independently to each blank mold half as well as independently to the plunger for each blank mold. The closed loop blank mold temperature control system can provide temperature setpoint commands, balance left and right parison temperatures, and maintain parison temperatures as a setpoint, all of which contribute to enhanced final glass container quality.

主权项

1. A blank mold cooling cycle timing control system for an individual section machine, the individual section machine has multiple sections and multiple blank molds in each section, comprising:
a heat measurement apparatus that determines a surface temperature of at least one element of a blank mold and provides a temperature measurement indicative thereof; a coolant supply; a valve arrangement for selectively delivering coolant from the coolant supply to the at least one element of the blank mold; a temperature input indicating a desired temperature at which the at least one element of the blank mold should be maintained; a controller for providing a cooling duration output to operate the valve arrangement to deliver coolant to the at least one element of the blank mold in a manner directed to achieving the desired temperature; an error monitoring feedback system having as inputs the temperature input and the temperature measurement which error monitoring feedback system provides an output to operate the controller; and wherein the heat measurement apparatus comprises:
a multi-axis pyrometer mounted on a pyrometer support rail to move between sections, and wherein the multi-axis pyrometer determines the surface temperature of the at least one element of each of the blank molds in each of the sections; and wherein the error monitoring feedback system comprises: a mold thermal model controller that computes a predicted temperature of the blank mold; a first summer for subtracting the predicted temperature provided by the mold thermal model controller from the temperature measurement provided by the heat measurement apparatus to produce a modeling error; and a second summer for subtracting the modeling error provided by the first summer from the temperature input indicative of the desired temperature to produce an error signal that is provided to the controller.