Electrostatic Powder Coating Process With A Corona Spray Gun

Monday, February 1st 2021. | wallpaper

Electrostatic powder coating process with a corona gun. 1 2 4 main equipment for powder electrostatic spraying spray gun and electrostatic controller in addition to the conventional built in electrode needle the spray gun is provided with a ring corona on the outside to make the electrostatic field more uniform to keep the thickness of the powder coating uniform.

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The part is then conveyed into an oven for curing of the powder.

Electrostatic powder coating process with a corona spray gun. As the powder passes through the electrostatic field created by release of 100 kv at the gun tip it picks up a charge and gets deposited on the grounded substrate. The electrostatic charge is obtained by conveying the powder through a special spraying device such as corona or tribo spray gun. Numerical simulation of the electrostatic powder coating process with a corona spray gun author links open overlay panel q.

At the tip of the spray gun there is a pointed corona electrode charged with a very high voltage. In the cure oven the powder melts and cross links to a hard film to complete the process. This high voltage creates an electric field between the corona and the grounded work piece.

In this paper the numerical simulation of the electrostatic powder coating process using a corona spray gun has been presented. The powder is fed to the spray gun from storage containers using compressed air. The numerical model accounts for the effects of aerodynamic and electric forces as well as the turbulence dispersion on particle.

Electrostatic spray corona charging is the most common method used in powder coating the process disperses finely ground powder into corona field at the gun tip applying a strong negative charge to each particle. Powder is pumped through the gun and out of the gun tip using compressed air. Spray application is the most common powder coating application method.

Powder is sprayed through the gun using compressed air. Electrostatic spray coating consists of depositing electrically charged powder particles on the metal surface at ambient temperature. Electrostatic spray application of powder is the most common application method.

The free ions created in the field rush towards the nearest ground the object to be coated. The complex spray geometry was considered in the simulation. These particles have a strong attraction to the grounded part and deposit there.

Corona charging of the powder is done by an electric spray gun. As the powder passes through the electrostatic field at the gun tip it picks up a charge and is attracted to a grounded substrate. It is typically used to apply thin films 25 125 microns but can also be used for slightly thicker film applications.

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