When using polyurethane foaming machine, you need to know the working principle of polyurethane foaming machine, so that you can master the operation process of polyurethane foaming machine.

Working principle of polyurethane foaming machine. The main working parts of foaming machine are double-acting pneumatic and hydraulic plunger pump. After entering the compressed air, the piston moves to the upper or lower end of the cylinder to make the upper pilot valve or lower pilot valve action, control the flow instantaneous drive valve valve reversing device, so that the pneumatic motor piston for a stable and continuous reciprocating motion. Because the piston is rigidly connected to the plunger in the paint plunger pump, and the area of the piston is larger than that of the plunger, thus pressurizing the suction of the paint. The pressurized coating is transported to airless spray gun through high-pressure hose, and finally releases hydraulic pressure and instantaneous atomization at the airless nozzle and sprays to the surface of the coated material to form a coating layer.

Polyurethane foaming machineBefore using the spraying machine, check whether the bolts, nuts and pipe joints in the spraying machine, including connecting nuts at both ends of suction hose, are tightened or not, due to vibration during transportation. Carefully understand the opening and closing direction of each air channel gate valve and the rotation direction of pressure regulating valve and discharge valve. The pressure regulating valve handwheel is lifted up to adjust (the handwheel rotates clockwise with high pressure, counterclockwise with low pressure), and the handwheel is locked down.

Slightly open the inlet valve no more than 1/3, at this time the spraying will be continuous, stable reciprocating movement. If the spraying machine no load reciprocating movement is normal, you can insert the suction tube into the paint bucket suction paint or solvent, open the discharge valve, do not open the spray gun, until the spraying machine hydraulic system no load pressure cycle 2 ~ 3 minutes, close the discharge valve, paint hydraulic system pressure balance, pneumatic hydraulic pump should be able to stop.

rom the above, only understand the working principle of polyurethane foaming machine equipment, in order to solve the emergency in the use of the process, add horsepower for your project.