喷塑和烤漆工艺原理是利用电晕放电现象使粉末涂料吸附在工件上的。其过程是这样的：粉末涂料由供粉系统借压缩空气气体送入喷枪，在喷枪前端加有高压静电发生器产生的高压，由于电晕放电，在其附近产生密集的电荷，粉末由枪嘴喷出时，形成带电涂料粒子，它受静电力的作用，被吸到与其极性相反的工件上去，随着喷上的粉末增多，电荷积聚也越多，当达到一定厚度时，由于产生静电排斥作用，便不继续吸附，从而使整个工件获得一定厚度的粉末涂层，然后经过加热使粉末熔融、流平、固化，即在工件表面形成坚硬的涂膜。
The principle of spraying and baking is to make the powder coating adsorbed on the workpiece by corona discharge. The process is as follows: the powder coating is fed into the spray gun by the powder supply system through compressed air, and the high voltage generated by the high-voltage electrostatic generator is added at the front end of the spray gun. Due to corona discharge, dense charges are generated near the powder. When the powder is ejected from the gun nozzle, the charged coating particles are formed, which are absorbed to the workpiece with opposite polarity under the action of electrostatic force When the thickness reaches a certain thickness, due to electrostatic repulsion, it will not continue to adsorb, so that the whole workpiece will obtain a certain thickness of powder coating, and then the powder will be melted, leveled and solidified by heating, that is to say, a hard coating film will be formed on the surface of the workpiece.