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Powder Coating Machine Common Malfunctions and Treating Methods

Views:106     Author:Seven Zhou     Publish Time: 2018-11-29      Origin:Site Inquire

1.Usually powder spray is normal and now the amount of powder spray is small

A. It is possible to block the powder pump core with impurities such as recycled powder or solidified substances in the powder pump. Unscrew the powder pump and clean it up.

B. Check the four pressure gauges, which may have a large fluid pressure or open the cleaning and atomizing gas. And the powder feeding pressure is low. After cleaning for fluidization, close the cleaning and atomizing valve.

C. Check the intake air meter to see if it reaches 7mpa pressure. Check the inlet pipe and the powder pump connector for leaks.

D. Open the sprayer case, open the spray gun switch, and check if the air guide pipe and joint have a leak position. Reconnect or replace.

E. Check if the pump core of the powder pump is damaged and the atomizing air pipe is leaking, replace the pump core and connect the atomizing air pipe.

F. It is possible that the powder quality is low and the ratio is large (the powder has a large moisture ratio). Only when the fluidizing gas is increased, the powder fluidization can be ensured, and the powder supply pressure is reduced.


2, Usually normal and now swallow powder, sometimes broken, uneven powder.

A. Extend the hand into the fluidized barrel and check if the powder has agglomeration of “powder ball”. Or there are impurities such as sand in the powder bucket. The powder ball is sieved through a 60 mesh screen or window screen. The sand passes through a 150 mesh screen.

B. Check if the powder pump powder guide joint is in contact with bad air leakage and tighten the seal.


3, The spray gun is uneven, some part the spray is large, some part is small.

A. Check the flow guide electrode of the spray gun head and replace it with a new one.

B. Check the diversion cap of the spray gun head. If the wear is severe, replace the new product.


4, The same barrel of powder, the powder rate suddenly decreased, the floor powder increased.

A. Extend the hand into the fluidized barrel and check if the powder has agglomeration of “powder ball”. Or there are impurities such as sand in the powder bucket. The powder ball is sieved through a 60 mesh screen or window screen. The sand passes through a 150 mesh screen.

B. Check the ground wire of the workpiece to open and reconnect.

C. Close the main intake valve, turn on the spray gun on the top of the head, and check if the spray gun is static. Find a professional to repair.


5, The same powder product, different batches of powder, when the powder is sprayed, the floor powder is sometimes more or less

A. Adjusting the sprayer to increase the electrostatic voltage can be improved.

B. If there are more “granules” on the board surface, the powder production process may be sifted.


The most vulnerable part of the powder coating machine is the pressure regulating valve switch, encountered the above problems first from the above reasons to deal with, the same powder has the same specific gravity, the same air pressure used, so most are not the cause of the switch. Adjust the pressure regulating switch under the normal powdering condition, and adjust the side to see that the amount of powder is suitable. When the pressure regulating switch is screwed to the extent of the force, it will be damaged.


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