This functional unit is concerned with the recovery of the excess impregnating agent from the surface or from bores and other collection points. This adhering impregnating agent is still in the same (original) state as in the autoclave during the impregnation process and requires no further processing. Therefore, the goal should be to recover as much of the impregnating agent as possible.
In the simplest systems, there is pure dripping, and the impregnated, wet batch is not subjected to any further movements. Although a lot of the adhering impregnating agent drips off, this is not very effective.
A better alternative here is rotating dripping, with the batch experiencing a clocked or continuous rotation about the Z axis during the dripping process. As a result, spots can then run out which are unfavorable in the case of pure dripping.
The most effective method is the centrifuge. In this case, the impregnated workpieces are subjected to high speeds in their batch container, which drastically reduces the amount of resin adhering to them. The batch size and shape have a very large impact on effectiveness. Large, round baskets with many small parts can often only be exposed to lower speeds around the x-axis, otherwise the workpieces may be damaged by changes in position.
Workpieces that are fixed in special holders can also be exposed to higher speeds (up to 250 rpm). A further increase in effectiveness is achieved if you do not rotate around the X but around the Z axis, as this also allows the upward-facing impregnation agent collection points to be emptied.