Dispensing
The two reactive materials, polyol and isocyanate, are kept separate until they reach
the mixing head. When it is time to dispense a shot or make a pour, the machine
automatically switches from recirculation to dispense mode. At this point, the metering
pumps precisely deliver the materials to the mixing head at the required volume, ratio,
flow rate and temperature. The chemicals are then mixed by either high-pressure
impingement (about 2500 psi) or in a high shear dynamic mix chamber. The mixture
is then injected into a closed mold or poured into an open mold or cavity.