The state-of-the-art powder coating plant covers a wide range of very specialized process equipment, and is fully automated. A water-softening unit treats the raw water before it is utilized in the automatic hot spray pre-treatment system. It provides an even distribution of chemicals, controlled by an auto dosing mechanism that maintains the chemical bath composition with the help of electronic sensors. After a final mineral water rinse, the components pass through a dry-off oven under dust-free conditions to remove all traces of moisture.
The components are then transferred into the powder painting booth for coating, where temperature, humidity and dust levels are controlled. The powder painting equipment, supplied by Nordson, USA, is equipped with automatic electromechanical oscillators, for even powder deposition.
Desiccant dry air-with a dew point of minus 400 C - helps avoid any moisture contamination of the powder. A 'smart spray' mechanism senses the conveyor movement and component geometry to adjust powder flow.
Polyester powder - ideally suited for out door applications - provides the maximum protection against UV deterioration and corrosion.
The components finally pass through a temperature-regulated curing oven to achieve desired gloss and surface hardness.
An accelerated life-test result of 1,000 hours in a salt spray chamber confirms the process capability of this world-class paint shop.