small powder coating equipment

• Common problems in the process of spraying

  

  Jul 25, 2025

  Spray unevenness is a common quality problem, which may lead to inconsistent coating thickness and affect the appearance and durability of products. The common reasons are as follows: 1. Unstable spray pressure: During the spraying process, if the pressure of the spraying equipment is unstable, it will lead to uneven powder spray and affect the uniformity of the coating. Common causes include unstable compressed air system, poor connection between the spray gun and the electrostatic generator, etc.  resolvent ： .      Ensure that the pressure of the compressed air system is stable and check it regularly. .      Adjust the nozzle pressure to ensure that the pressure is within the recommended range. .      Check the connection of the equipment to ensure that the voltage between the spray gun and the power supply is stable.     2. The spray gun distance is not appropriate: If the distance between the nozzle and the surface of the substrate is too close or too far, the spraying will be uneven. If the distance is too close, the powder injection amount is too large, which is easy to form accumulation; if the distance is too far, the adhesion of the powder is insufficient, which is easy to produce thin coating or splash.  resolvent ： Adjust the position of the spray gun according to the recommended distance in the equipment manual. The distance between the spray gun and the substrate is usually recommended to be 15-30cm. Adjust the Angle of the spray gun to ensure that the powder can cover the surface evenly. 3. Improper control of powder spray: Too much or too little powder spraying will lead to uneven spraying, too much powder will lead to thick coating, too little powder will lead to uneven coating and poor adhesion.  resolvent ： .     Use the powder flow control function of the spraying equipment to ensure that the powder amount is appropriate. .     Check the nozzle of the spray gun regularly to ensure that there is no blockage and the powder flow rate is stable.  

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