Method for controlling spray air supply when applying paste-type substances

摘要

The ratio of conveyor air pressure of a pneumatically operated dosing member and the exit speeds of the mass from the dosing member is detected and used as the scale for the viscosity of the mass. The supply of spray air is adjusted according to the viscosity. The dosing unit can comprise an inner and outer cylinder (10,12) mutually displaceable and closed at the outer ends except for inlet and outlets (18,20) containing valves (22,24).