MIXING HEAD DEVICE OF THE DISCONTINUOUS POLY URETHANE METERING FOAMING SYSTEM

摘要

PURPOSE: A mixing head device of an intermittent type of urethane foaming machine is provided to lower cyclic pressure by circulating urethane liquid with a three way valve and prevent the rise of the temperature of urethane liquid, thereby maintaining constant temperature. CONSTITUTION: A mixing head device of an intermittent type of urethane foaming machine comprises a three way auto valve (1), an air cylinder (2), a pair of urethane liquid nozzles (3), a mixing head and a washing nozzle (6). The air cylinder always pushes the urethane liquid nozzles and controls the pressure of the nozzles to prevent backflow when measuring and foaming urethane liquid. The urethane liquid nozzles are installed between the air cylinder and at the lower part of a discharging pipe and is controlled with an air pressure of 150kg /cm^2. The discharging pipe (5) is installed in the upper part of the mixing head and mixes urethane liquid transferred from the urethane nozzles. The washing nozzle is installed at the lower part of the mixing head and washes the discharging pipe and the mixing head. [Reference numerals] (AA,BB,CC,DD) Air