Basic Principle Of Tribo Charging In Powder Coating Article

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Basic Principle of Tribo Charging in Powder Coating

As a matter of fact, the same powder of different batches exhibit different Tribo charging characteristics. This happens when Powder manufacturer changes formulation for batch to batch. Therefore your powder supplier must be informed that you want a powder which can be used with a tribo gun.

Author: Mitsuba

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Most leading powder makers today make tribo compatible powders. In real time experience, when Hybrid & Pure Polyester Powders are not specially Tribo formulated, they sometimes Tribo charge and sometimes do not. As a matter of fact, the same powder of different batches exhibit different Tribo charging characteristics. This happens when Powder manufacturer changes formulation for batch to batch. Therefore your powder supplier must be informed that you want a powder which can be used with a tribo gun.

TRIBO ADVANTAGE NO.1
High Quality Powder Coating for exceptionally brilliant surfaces.

THE TRIBO PRINCIPLE
The Coating Powder is friction charged within the gun without ionizing air or generating field lines.

THE RESULT
Complete elimination of the Faraday Cage effect and extraordinarily coated surfaces.

THE ADVANTAGES OF TRIBO CHARGING :

1.Better in depth penetration. Effective coating of complex angular shapes, even inner surfaces of tubes.
2.Reduced Orange Peel.
3.Better coverage of weld seems.
4.No external High Voltage generation. Powder is charged by self execiting ion charger. Outstanding safety.
5.Charges only powder without charging dust. Optically brilliant finishes.
6.Suitable for coating glass, metal, ceramics and wood.

THE ADVANTAGES OF TRIBO GUN.

1.Specially designed rotary powder path creates highly efficient frictional charging .

2.Reduced gun length. Reduced weight. Increased maneuverability. Fatigue proof.

3.The Gun can be completely disassembled in minutes for routine cleaning.

4.Eliminates cross-contamination of powder during color changes.

5.Wear resistant design and materials extend gun life to as much as 3 times to that of competitive Systems.

6.Suitable for wide range of powders , including Epoxy, Polyester, Polyurethane, Nylon, Epoxy Polyester and polyester limited.

The Tribo control unit uses advanced pneumatics and electronics to set, regulate and indicate powder flow rate, powder charge. Exceptionally high electrostatic charge given to individual powder particles ensure that even complicated shapes are coated inside out.Powder output comparable to Corona charging systems.Tribo gun can be used with existing Tribo pumps and controls.Advanced pneumatic and electronic controls ensure accurate control and perfect spray patterns.

The Tribo Powder System can also be fitted on a reciprocator to give a more homogenous overall coating.

TRIBO SPRAY HEADS
Full coverage with minimum overspray is possible, thanks to a wide range of Triboline spray heads and nozzles that help achieve a finely distributed cloud of powder.

ADVANTAGES OF TRIBO:

1.Superior Quality Finish due to

Reduced back Ionization
Non charging of Dust

DISADVANTAGES OF TRIBO :

•It is Powder Dependent & hence the powder supplier must specifically supply tribo compatible powders.

•Perfectly suitable for Pure Epoxy / Polyurethanes / Acrylic & Nylon.

•Hybrid Epoxy-Polyester & Pure Polyester may or may not charge in Tribo guns. These powders can be made Tribo compatible by doing some changes in formulations.

•Transfer efficiency is not high as corona and therefore production is slower In automatic installation this may not matter much because one cannot simply increase the number of guns to offset this advantage.

The following conclusions are drawn :

•Users must be educated regarding the pros & cons of using Tribo.

•Leading manufacturers make Tribo compatible powders, For other powder manufacturers the incentive to develop the Tribo Powders will surely come soon because Tribo world wide popularity is increasing due to the superior finish it provides.

•Tribo guns should have a definite advantage for special applications.Eg. Coating bathroom fittings & other such highly decorative finish requirements.

•Jobbers can complement their Corona Systems with a Tribo gun & can thus offer a complete spectrum of finishes.

About Author

I am working as a manufacturing professional in Mitsuba.

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Basic Principle of Tribo Charging in Powder Coating