Deviations of the individual mass flows
When the operator detects mass flows in such devices that are too low, respectively, multi-component profiled members that are too small, the number of revolutions of the individual extruders is increased uniformly percentage wise for single screw extruder all individual extruders at the same time. Correspondingly, the number of revolutions of all individual extruders upon detecting of mass flows that are too high, respectively, multi-component profiled members that are too large, is simultaneously and uniformly lowered percentage wise.
With such multi-component extrusion devices the operator cannot obtain information with respect to deviations of the individual mass flows, respectively, the dimensions and weight of the different single-component members and thus with respect to the differences of composition of the complete mass flow, respectively, the entire multi-component profiled member. The operator also does not obtain information with respect to how deviations of the single-component members affect deviations of the complete mass flow, respectively, the multi-component profiled member.
When only one individual mass flow deviates from the desired mass flow of this component, the operator, after measuring the complete mass flow, respectively, the multi-component profiled member by weighing only obtains the information that the complete mass flow, respectively, the multi-component profiled member has changed. With such multi-component extrusion devices, as already mentioned before, the number sheet production extruder of revolutions of all individual extruders is then changed. Accordingly, for a deviation of only one of the individual mass flows or of a single component of the entire multi-component profiled member from the nominal value of this individual mass flow, respectively, of this single-component profiled member, it is not the individual mass flow that is adjusted to the respective individual nominal value, but the other individual mass flows are also changed from their correctly adjusted nominal value because of the uniformly performed adjustment of the number of revolutions of all individual extruders to an incorrect value of individual mass flow, respectively, of the single-component profiled member. The composition of the multi-component mass flow, respectively, of the entire multi-component profiled member thus remains incorrect.