Patent ID: 7744788

Claim:
A method of operating an injection moulding machine having an extruder for continuously producing a melt of a desiccant-filled polymer and with at least one injection device fluidly connected with the extruder and including an injection ram, comprising the steps of; Ascertaining a viscosity or melt flow index downstream of an outlet of the extruder by a sensor which allows determination of viscosity or melt flow index; Comparing the viscosity or melt flow index with a given desired viscosity or melt flow index; Generating a control signal in response to a deviation between the ascertained viscosity or melt flow index and the desired viscosity or melt flow index; and adjusting in response to the control signal the desiccant load in the polymer to adjust the viscosity or melt flow index to a level corresponding with the desired viscosity or melt flow index value.