Waste powder is can't use at the scene of powder, in large (small) cyclone separation system of waste powder inside bucket of powder, the powder particle size is relatively small, charging effect is bad, it's hard to spray on the workpiece. We know that powder coatings have high production efficiency, excellent film coating performance, good ecological environment protection and outstanding economy. In the production, equipment manufacturers through the improvement of electrostatic equipment spray gun and equipment technology to improve the dead corner powder rate. There are many factors influencing the powder rate on the dead corner of powder coatings, which can be divided into external factors and internal factors. External factors include the elbow size and shape of the coated workpiece, customer powder spraying system, powder spraying construction personnel, etc., powder formulation adjustment and operational factors in the spraying process, which are internal factors.

The scrap rate is the percentage of waste powder = the percentage of waste powder/total used component.

What factors will affect the waste powder rate?

1. Particle size ratio of new powder

2. Air injection ratio

3. Frequency of color change

4. Powder rate

5. Separation efficiency of cyclone device

6. Integrity of the system

7. The primary qualification rate of spraying products is also a factor to reduce the waste powder

The particle size ratio of the new powder is determined by the powder factory. The powder factory needs to provide the particle size distribution map of the new powder to minimize the proportion of the fine powder.

Reduce the proportion of air blast, because when air blast is 0% powder rate, the powder is separated by cyclone devicewhile powder sprayingprocessing. The method is to change the hanging mode or increase the clearance automatic control system.

Every change of color will lose 10 kilograms of powder, reasonable production plan, can reduce a change of color, can reduce more than 10 kilograms of waste powder!

Increase the powder powder powder rate, also can reduce the waste powder. The powder rate is related to the electrostatic system of spray gun and the good or bad grounding of workpiece. The separation efficiency of cyclone devices is determined by the equipment manufacturer. High separation rate will reduce the amount of waste powder. The integrity of the system is also an important factor affecting the rate of waste powder. Timely maintenance of the system is also important in spraying! Increasing the qualified rate of spray products can reduce the amount of recycled powder, which can also reduce the proportion of waste powder.

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