Attention should be paid to powder coating sprays. Thermosetting powder coatings prompt you.

The production of powder coatings spraying room is a key process in the production of thermosetting powder coatings. The key to the surface quality of the spraying workpiece is the control of the process parameters. The amount of pulverized coal and atomizing air are two key technical indicators.

Before the formal spraying, can try several times, at this time can be observed at both ends of the spray room powder size and powder distribution uniformity. At this point, the powder moves in a straight line from the tip of the spray gun 10 cm to 15 cm, and the powder adsorbed on the surface of the workpiece exists in the form of atomized powder. In addition to process parameters, some necessary minor points should also be noted.

1. The position of the spray gun.

The spray gun should keep a certain tilt and deviate from the direction of the workpiece. The spray gun should keep vertical parallel in the arrangement. The end part should be kept in a straight line. There should be no overlap between the spray guns. The position of the upper and lower spray guns should be powder covering all the workpieces.

2. Control of fluidization pressure

The role of fluidized bed is to use the role of air flow, so that the powder to form a proper fluidized state, feel similar to the state of liquid flow, fluidized to detect the full state, the simplest operation is: stirring powder with hands or sticks, do not feel the presence of resistance. Fluidization is convenient for powder inhalation duct. Under the action of accelerated wind, it produces atomization effect. Insufficient pressure or excessive pressure will cause insufficient fluidization.

3. Recovery and reuse of powder

The powder adsorbed on the surface of profiles only accounts for about 1/3 of the powder output of all spraying guns. There are more powder scattered in the spraying room. The recycled powder must be mixed with the new powder in proper proportion. The effect is better. Therefore, the powder should be recycled and reused in time.

4. The closeness of spray room

Powder is easy to be polluted by external air suspended matter. Flocculent or shrinkage pores are easily produced on the surface of profiles after powder spraying. The surface of profiles is affected by baking. Therefore, the spraying room should be closed to prevent the invasion of pollutants.

5. The residual powder in the trachea should be cleaned and cleaned in time, not used for a long time, easy to agglomerate, powder prone to produce the phenomenon of pulverizing, affecting the spraying effect.

6. Backup powder bucket.

It can effectively improve labor efficiency when used for powder exchange. The maintenance work of dust-proof and moisture-proof of the powder barrel must be done well to ensure the quality of the remaining powder in the powder barrel.

7, in addition, the work of powder addition should also be emphasized.