Ford-werke Ag

Bollhoff Verfahrenstechnik Gmbh & Co. Kg

Int Gesellschaft MIT Beschrankter Haftung Ingenierburo Fur Neue

Ralf Ludwig

Heinz Wessel

Robert Murray

Wolfgang Rosteck

A nozzle device includes an axially extending tubular, cylindrical outside part; and a cap threaded on the outside part at the front or discharge end of the device and having a discharge bore composed of a rearward cylindrical portion having a first diameter; a frontal cylindrical portion having a second diameter less than the first diameter; and a frustoconical portion connecting the rearward and frontal cylindrical portions with one another. An axially extending inside part is coaxially received in the outside part and has an outer wall defining, with the inner wall of the outside part, an annular space for guiding gas therethrough. The annular space is axially adjoined by the discharge bore of the cap. The inside part further has a forwardly conically tapering end portion projecting into the frontal cylindrical portion of the discharge bore of the cap; an axial bore for guiding a viscous material therethrough; and a nozzle bore axially adjoining the axial bore and having an outlet opening for discharging the viscous material. The nozzle bore outlet opening is situated within the frontal cylindrical portion of the discharge bore of the cap. A port is provided in the outside part for introducing the gas into the annular space. At least three support lugs are positioned in the annular space in engagement with the inner wall of the outside part and the outer wall of the inside part for coaxially positioning the inside part relative to the outside part.

Nozzle device

A layer of viscous material is applied to a substrate by constricting a stream of pressurized viscous material prior to entry into a chamber wherein the constricted filament-shaped stream is acted upon by radially inwardly and forwardly oriented currents of compressed air which reduce the thickness of the stream and issue with such stream from the chamber through an orifice. The orientation of air currents in the chamber is such that the filament is not imparted a swirling movement. The flow of air issuing from the chamber through the orifice forms a hollow cone which surrounds the filament of viscous material on its way toward contact with the substrate.

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Bielefeld, Germany

Ralf Ludwig