AbstractExpanding the general knowledge of the extrusion process in a co-rotating twin-screw extruder requires several parameters to be determined, among them the residence time distribution (RTD). This contribution introduces an optical measurement setup for acquiring the residence time density and distribution function. Based on our measurement results, we derive the influence of the rotational speed of the screws, mass flow rate and of different types of screw configurations on residence time.
This paper describes the use of a CD pickup head as a displacement measurement system. First, the components contained in a pickup head are explained and how they are combined to obtain the functionality of a pickup head. Afterwards, the application of measuring a knife edge profile is introduced. The results revealed some insuffiencies with the current system. Nevertheless, the cutting edge's radius of curvature can be estimated.
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