Spraying module for spraying an outer surface of a rotating cylinder

摘要

The invention relates to a spraying module for spraying the outer surface of a rotating cylinder or roller, for example, a printing cylinder of a rotary printing press, with a liquid mist by means of spray nozzles, wherein the spray direction of the spray nozzle lies in a range, relative to the horizontal, for a spray jet directional angle gamma of 30° to 150°.

主权项

1. A dampening unit spraying module for spraying an outer surface of one of a cylinder and a roller of a printing couple of a rotary printing press with a liquid mist and which is rotatable about its rotational axis, by the use of at least one spray nozzle, the spraying module including a mounting chamber formed between first and second outer shutters which are spaced from one another, a size-adjustable metering chamber being provided in the mounting chamber formed by the first and second outer shutters, the at least one spray nozzle being arranged inside the size-adjustable metering chamber, the size-adjustable metering chamber including first and second metering shutters positioned inside the mounting chamber defined by the first and second outer shutters, which first and second metering shutters are spaced from one another and which are pivotable toward and away from one another, the first and second metering shutters each having an interior side and each being bent at an obtuse angle, and each being arranged with the obtuse angles of their respective interior sides being opposite one another and parallel to the rotational axis of the cylinder, the first and second metering shutters being directed toward the outer surface and being supported by the spraying module, a central jet of the at least one spray nozzle, and a spray direction of the at least one spray nozzle, being directed in the metering chamber onto the outer surface, and toward the rotational axis, in a spray jet directional angle, with the spray jet directional angle, relative to a horizontal plane which intersects the rotational axis of the one of the cylinder and roller, lying in a range of 30° to 150° in the IIIrd to the IVth quadrants of a rectangular system of coordinates, the center of which is on the rotational axis.