Polyurethane spraying machine can be divided into high pressure polyurethane
spraying machine and low pressure polyurethane spraying machine according to different
The high-pressure polyurethane spraying machine pressurizes the AB component raw
materials through the primary material lifting pump and the secondary booster pump,
and then the AB component raw materials enter the rapid heating heater to be heated to
a proper temperature (usually 40-45 deg C), and collide with each other at the
spraying device under high pressure to form a vortex atomized and sprayed out of the
gun, and finally, the spraying device automatically cleans the mixing chamber to
complete a spraying action.
The low pressure polyurethane spraying machine has a simple structure, because
there is no quick-heating heater, so it adopts the way of barrel heating. After the
raw materials are poured into the barrel manually, the principle of Y-shaped tee is
adopted. The raw materials are pumped into the mixing pipe through the diaphragm pump.
After the AB components flow into the mixing pipe, the AB components are blown out by
high-pressure air to complete a spraying action.
Seven. Advantages and Disadvantages of High Pressure
and Low Pressure Polyurethane Spraying Machines
Advantages and Disadvantages of Low Pressure
Polyurethane Spraying Machine
Advantages: low price, suitable for one-time or short-term use of polyurethane
Disadvantages: low output, low mixing efficiency, easy to produce secondary foam,
resulting in bulging and cracks on the spraying surface, and easy to block the gun.
Advantages and disadvantages of high pressure polyurethane spraying machine:
Has the advantages of uniform mixing, high yield, dense and uniform foam, good heat
preservation effect, good dimensional stability and difficult gun blocking.
Disadvantages: The equipment is expensive and suitable for professional construction
parties engaged in polyurethane spraying for a long time.