Common problems in the use of spraying machine mainly include:

1. Sprayer blockage: impurities in the nozzle or filter may cause the sprayer blockage. The solution is to clean the nozzle and filter to ensure that there are no impurities blocking the flow of paint12. ‌

2. Uneven paint surface sprayed by the sprayer: this may be caused by unstable pressure of the sprayer or abrasion of the nozzle. Check the pressure gauge and nozzle of the spraying machine, and replace or adjust them if necessary 12. ‌

3. The spraying machine can not spray paint: the paint is too thick, or the feeding pipe of the spraying machine is blocked, and air leakage may cause this problem. It is necessary to ensure that the coating is stirred evenly and check whether the feed pipe is blocked or air leakage12. ‌

4. Excessive noise of the spraying machine: the internal parts of the spraying machine may be loose or the air compressor may not work properly. It is necessary to check and tighten the loose parts, or repair and maintain the air compressor 2. ‌

5. Difficulty in starting the spraying machine: unstable power line connection, motor problems or drive part failure may cause difficulty in starting. It is necessary to check the power cord, motor and drive part, and carry out necessary maintenance or replacement

When the feeding pipe of the spraying machine is blocked, the following measures can be taken:

1. Stop the machine immediately and find out the position and degree of pipe plugging : At the initial stage of pipe plugging, the pipe plugging position is usually at the head of the pipe connected to the nozzle. ‌

2. Pressure relief and power off : First let the spraying equipment back up to relieve the pressure, and then turn off the power supply of the machine. ‌

3. Clean the blockage : Remove the spray gun, with the pipe mouth downward, gently tap the pipe to discharge the mortar lost at the front end of the pipe. If the pipe blockage is serious, it is necessary to remove the blocked pipe and use the soft water pipe connected to the external water source to stretch into the pipe for flushing. ‌

4. Check and reassemble : After the mortar with normal fluidity is discharged from the pipe mouth, install the spray gun again and check whether the spray gun is blocked. Rinsed pipes must be lubricated again to prevent pipe plugging again