What are the causes and solutions for the defects of the automatic spray gun? (2)

Update:10-10-2020
Summary:

1. Defects of spray pattern: the spray pattern is bent […]

1. Defects of spray pattern: the spray pattern is bent in a banana shape
Cause: One of the fan-shaped holes is blocked or deformed, and the air pressure of the fan-shaped holes on both sides is inconsistent; the blockage of the atomization hole causes the air to run to the fan-shaped holes, causing the air pressure of one of the fan-shaped holes to increase.
Solution: Use a special cleaning kit to clean the hood of the automatic spray gun, and replace the nozzle kit if necessary.
2. Spray pattern defect: the wet area in the spray pattern is biased to one side
Reason: The fan-shaped hole or the atomization hole is blocked or deformed, and the atomized paint tends to one side due to the uneven air flow; the nozzle is damaged, and the gap between the atomization hole in the center of the hood and the nozzle is uneven, which makes the atomized paint tend to one side.
Solution: Clean the hood with a special cleaning kit, and replace the nozzle kit if necessary.
3. Defects of spray pattern: the spray pattern is twisted and inclined or formed into an S shape
Reason: the fan-shaped holes are blocked or deformed, and the diagonal fan-shaped holes on both sides are blocked or deformed so that the spray pattern is inclined.
Solution: Clean the hood with a special cleaning kit, and replace the nozzle kit if necessary.
4. Defects of spray pattern: discontinuous spray pattern and pulsation
Reason: The nozzle of the automatic spray gun is not tightly installed, the nozzle and the air diverter ring are not completely sealed, and the air ran to the paint passage; the nozzle or the air diverter ring is not clean, and the paint residue prevents the nozzle and the air diverter ring from being completely sealed; the air diverter ring Damage to the sealing surface affects the sealing between the nozzle and the nozzle; the vent of the gun pot is blocked, and the vent of the gun pot is blocked to create a vacuum to draw air from the nozzle into the paint channel.
Solution: Tighten the nozzle with the original wrench, clean the nozzle with a special cleaning kit, and replace the air diversion ring. Clean the vent of the gun pot and replace the gun pot if necessary.

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