Alternative solution: a KUKA KR 125 six-axis robot. This jointed-arm robot uses a nozzle to blow loose sand residues out of the counterweight molds, and then applies the alcohol-based wash using a flood lance. Before the order was placed, however, a check was carried out on the basis of the Cartesian coordinates to verify that the KR 125 could in fact reach the furthest corners of the mold. 
A roller conveyor transports one of the molding boxes to a turnover station. There the robot controller reads in the code of the box and thus recognizes which box types are to be processed in the cell, and in what order. As soon as the conveyor system receives the appropriate signal from the robot controller, the box is indexed forward on the roller conveyor until it stops underneath a manipulator. The manipulator picks up the box and swivels it into a position where the robot can blow the sand out of the mold. After that the manipulator lifts the molding box over the wash collecting basin. The KR 125 then picks up its flood lance and applies the wash to the mold with great precision. Subsequently the manipulator rotates the box to allow wash residues to drip into the flood basin, then sets the box back down on the roller conveyor.
 
System components / Scope of supply 

KUKA KR 125 robot
PC-based KUKA robot controller, including control panel with Windows interface
Gripper system and its adaptation to the flood lance
Robot programming
Engineering for the program application
Interfaces to the periphery
Safety fences
Commissioning
Training for operating personnel