Automatic spray gun is a device that uses liquid or compressed air to quickly release as power, and can be used to spray various coatings such as water-based paint, primer, and topcoat. Let me tell you how to test the atomization effect of the new automatic spray gun.
One of the wrong atomization test methods: use a volatile solvent (thinner) to test the spray gun
The volatile solvent has a low boiling point. After being atomized by the spray gun, a part of it has volatilized, and there is not much solvent sprayed on the spray test paper at the end, so the test result cannot be accurately obtained; and the thin material is seen in the atomization process. Rather erratic and unstable.
Correct way: spray directly with paint
False atomization test method 2: Judging the atomization effect of the spray gun with the naked eye
Affected by air flow, viewing angle and light, it is impossible to visually see whether the atomization effect of the spray gun is normal by direct observation with the naked eye.
Correct method: The spray gun should be aimed at the spray pattern test paper during the test, and then the atomization effect should be judged by the shape of the spray pattern.
The third test method for wrong atomization: use the incorrect spray pressure to test the spray gun
High spraying air pressure causes the spray pattern to deform. The tested spray pattern is in the shape of "8", the ends of the spray pattern are large and the middle is small.
Correct method: Adjust the spray gun according to the parameters recommended by the Sata spray gun packaging box during the test, and perform the atomization test under the recommended air pressure and distance.
The fourth test method of wrong atomization: test the spray width with water
The viscosity of water (about 11 seconds/DIN4) is lower than that of the paint. Using the normal spray pressure test, it will appear that the two ends of the spray pattern are large and the middle is small.
Correct method: It is best to test directly with paint. If the conditions only allow the use of water to test the spray pattern, please reduce the spray pressure to half of the recommended spray pressure.
Correct and complete test method of atomization effect:
1. Adjust the spray pressure and distance according to the parameters recommended at the bottom of the automatic spray gun packaging box.
2. Adjust the paint output and spray width of the spray gun to the maximum, the spray gun and the spray width test paper are at a 90° angle, and the trigger is pulled to the bottom for about 2 seconds.
3. Check whether the shape of the spray pattern sprayed on the test paper is normal.
