Device for applying a coating agent
AssigneeAmtec Kistler GmbH
InventorRobert Vögel
Life of this patent
Estimating the term…
Abstract
With a device for applying a coating agent onto a cyclically moved substrate, a uniform coating thickness may be achieved, although the rate of advance is not constant. At least one spray valve is provided which is permanently supplied with coating agent and the nozzle opening of which being adjustable with regard to the size of its effective discharge area in case of change of the rate of advance of the substrate according to the dependency, for a constant layer thickness of the coating agent, on the discharge rate of the coating agent out of the spray valve on the rate of advance of the substrate.
Claims12
A device for applying a coating agent to a cyclically moved substrate comprising:
- at least one spray valve having an inlet, said inlet for supplying the spray valve with the coating agent, the spray valve having a nozzle opening means for adjusting a discharge rate of the coating agent out of the spray valve based on a rate of advance of the substrate, said nozzle opening means being adjustable relative to a size of a discharge area thereof, the nozzle opening means comprising:
- a valve seat;
- a valve needle cooperative with said valve seat;
- a doing spring means cooperative with said valve needle for lifting said valve needle from said valves at, said valve needle resiliently contacting a stop against a force of said closing spring means, said stop comprising a rotatable cam having a contour cooperative with said valve needle, said contour corresponding to a desired discharge rate of the coating agent out of the spray valve based upon the rate of advance of the substrate;
- a driving means drivingly connected to said cam for rotating said cam;
- and
- a control means interactive with said driving means, said control means for determining the rate of advance of the substrate and for determining a desired angular position of said cam relative to the rate of a vance, and control means for actuating said driving means so as to rotate said cam to the desired angular position.
Dependencies are inferred from the claim text.