At the previous K trade fair in Düsseldorf, ROWASOL and OPM had great success presenting three synchronously operated progressive cavity pumps on a continuously operating twin-screw extruder at the booth of KraussMaffei Extrusion, Hanover. With the piston pump the engineering specialist offers a specific solution for discontinuous processes such as injection molding, which is otherwise not available for liquid color dosing.

Contrary to the peristaltic pump, the hose is not squeezed and is therefore not a wear part needing periodic replacement and creating waste that has to be disposed of. For quick color changes, a component group known as the piston set and comprising of two hoses and the piston is removed and stored for the next time they are used. Non-drip quick couplings ensure clean handling.

The high-precision servomotor allows 0.1 to 80 ml of lacquer per shot to be dispensed. When changing between empty and full containers the piston volume serves as a color buffer eliminating the need to stop the process during changeover time. The resource-saving reusable container ROWASOL COLOR CUBE is ideally suited as a color container.