Method and apparatus for the curing of a radiation-curable coating and irradiation chamber

摘要

A process for hardening a radiation hardenable coating on a substrate in an irradiation chamber that contains one or more UV sources (18), comprises moving the substrate through a closed channel, formed by the inlet (60), outlet (70) and irradiation chambers (50). An inert gas is supplied to the chamber so there is a slight excess pressure in the chamber. A process for hardening a radiation hardenable coating on a substrate in an irradiation chamber that contains one or more UV sources (18), comprises moving the substrate through a closed channel, formed by the inlet (60), outlet (70) and irradiation chambers (50). An inert gas is supplied to the chamber so there is a slight excess pressure in the chamber. The inert gas moves in the advancing direction, and the volume flow is 15-1000, especially 30-400 Nm3>/h. The arrangement has bundled hollow members with nozzle shaped and/or porous openings. The chamber has a frame (21) with UV light transparent surfaces.