Device for applying a viscous material to workpieces

A device for application of a viscous material to workpieces, having a housing (12), having an application channel (14) that runs in the housing (12) all the way to an exit opening (16), and having a needle valve (18) for releasing and closing the application channel (14) at a valve seat (24), wherein an actuation element (28) is mounted in the housing (12) so as to rotate about an axis of rotation (30), wherein the axis of rotation (30) extends parallel to a longitudinal direction (20), in which the valve needle (22) of the needle valve (18) can be displaced with reference to the housing (12), wherein the actuation element (28) has a guide groove (34) in its radial mantle surface (32), which groove runs all the way around and is curved in the axial direction (20) and is closed in itself, into which groove at least one pin (36) that extends in the radial direction engages, and wherein the valve needle (22) is connected with the actuation element (28) or with the at least one pin (36) in such a manner that a rotation of the actuation element (28) about the axis of rotation (30) brings about a displacement of the valve needle (22) with reference to the housing (12), in the longitudinal direction (20).