Electrostatic Spraying Technologies
There are many key things that should arrive alongside one another in buy to use electrostatic guns efficiently. 1st you ought to pick the proper atomization technological innovation for your coating software wants. There are a number of electrostatic atomization technologies to pick from. The oldest and likely most common are the air spray electrostatic guns. These guns use compressed air as their primary and sole indicates of atomizing the coating. These guns are most commonly applied in apps that require a “Course A” automotive complete. The guns supply a ton of control at the gun these as fluid move by use of the fluid needle adjustment knob and fan management via the use of the fan adjustment knob. In addition, the amount of fluid can be controlled by how far again the operator pulls the cause. This is referred to as “feathering” the gun.
The principal source of fluid command is decided by the fluid force from a very low-force pump, the air heading into a strain pot or by a fluid regulator mounted close to, or in the spray booth. The viscosity of the coating and the dimensions of the fluid nozzle also have an impact on the fluid movement. Even though air spray electrostatic guns have excellent atomization, they are also the least effective of the electrostatic guns. This is owing to the likely use of high air force to atomize the coating. The use of higher air tension can defeat the electrostatic attraction by forcing the billed particles of paint past the portion or by generating abnormal bounce back again or overspray.
A variation of the air spray electrostatic gun is the HVLP electrostatic gun. The gun operates almost identically to the air spray gun other than that it employs considerably less atomizing air tension. Rather, the gun uses a lot more cubic feet of compressed air or CFM. The final result is a softer spray sample which lowers the velocity at which the paint particles journey. This permits for much more of the charged particles to remain in the electrostatic discipline which aids to make improvements to transfer performance. Like any HVLP gun, some coatings may perhaps be way too viscous or the application amount may well be way too large, which may perhaps make it challenging for the HVLP electrostatic gun to supply high efficiency and appropriate end high-quality for some applications. In addition, HVLP guns generally require a lot more CFM which can direct to amplified electrical expenditures for compressed air.
For the software of quite viscous elements or for pretty substantial software prices, some producers use airless electrostatic guns. These guns use pumps to develop very large fluid pressure which is the major means of atomizing the coatings. When the gun is activated, the significant fluid tension is allowed to escape into the ambiance by way of a tungsten carbide tip that is lower to sort an elliptical spray pattern. The dimension of the pattern and the quantity of fluid leaving the gun are controlled by the tip. The viscosity of the coating and the fluid tension employed also influences the software fee.
In standard, airless technologies does not supply the exact stage of atomization as air spray or HVLP electrostatic guns but they operate properly for some coatings, primarily when spraying significant items at large fees of pace. Suggestion plugging can be an challenge when spraying supplies that contain an aggregate these as silica or zinc. Air-assisted airless electrostatic is a hybrid edition of the airless electrostatic and the air spray electrostatic. These guns use each fluid tension and air force to atomize the coating. Pumps are required to produce the fluid pressure. Given that these sorts of guns use reduce fluid pressure than airless and fewer air force than air spray, they can provide businesses a very good compromise amongst the speed of an airless and a end quality nearer to the air spray electrostatic. The finest component is that this technologies is usually much more effective than possibly the air spray or the airless electrostatic guns. In some cases they are even extra economical than the HVLP electrostatic guns.
Nevertheless, air assisted airless electrostatic guns do not provide the very same amount of command at the gun as the air spray or HVLP electrostatic guns. This is for the reason that the fluid pattern are unable to be fully altered from pretty slender to very huge devoid of switching the tip. Also, like the airless electrostatic gun, the operator can’t feather the gun. This could be problematic when spraying incredibly advanced substrates where the operator súng phun sơn tĩnh điện requirements that form of control at the gun. Idea plugging can also be an issue with some aggregate stuffed products.