Sprayed skins for vehicle instruments and controls and for airbag cladding
are sprayed in a heated mold using a robot-guided nozzle. Here,
tight tolerances are required, particularly with the airbag as a safetycritical
part. For this reason the thickness of the sprayed skin must be inspected
during the spraying process. To achieve this, the combination sensors
are attached directly to the robot arm. An EU15(05) eddy current sensor
in combination with an optoNCDT laser-based optical triangulation
sensor is used. The eddy current sensor measures the distance to the
nickel-coated spray mould.and has an opening in the centre through
which the optoNCDT laser sensor measures the distance to the sprayed
part. When subtracted, both signals provide the thickness of the applied
sprayed skin