Complete powder coating lines

At the beginning of the process, all surfaces to be coated are transported to a tunnel and are subjected to different washing stages using higher and ambient water temperature. Pretreatment is carried out by centrifugal pumps which circulate the fluid in the bath. The hydraulic line consists of a series of centrifugal pumps constructed in INOX AISI 316 stainless steel, which direct fluids to the spray pumps. It is equipped with flanges, unions, adjustment valves and a pressure control manometer. The spray ramps are equipped with special nozzles made of polypropylene moplen, antiacid and water-repellent material, allowing mechanical and chemical operations to be performed on the parts of the product to be degreased. All the component parts of the ramps are removable and easy to maintain.

After the washing stage, profiles are transported into a drying oven with a forced air flow and are dried by hot-air circulating fans. The required drying temperature is between 100 to 120°C., however, it is possible to increase and adjust the drying temperature to improve the effect, but this entails higher fuel consumption costs. To apply powder coating evenly and to cure the powder coating correctly, all moisture must be removed from the parts. The oven will not dry out puddles or trapped moisture on every piece. That moisture must be drained by making drain holes on the pieces or installing the blowers at the oven entrance, prior to applying the powder coating.

The oven is equipped with a burner, based on the most modern design solutions, which ensures reliable operation and thorough drying. The electronic thermoregulation is controlled and monitored by an industrial thermometer with a probe situated on the burner. The fuse in the burner protects the heat exchanger against overheating in the case of lack of ventilation.

At this stage, the pieces are ready for coating powder booth, which is using recovery of the over spray system by a cyclonic, self-cleaning final filter with powder recovery and a built-in vibrating sieve.
When frequent colour change is required, a dielectric booth is recommended. Neutrally charged internal walls of the cabin and electrostatically charged powder enables quick colour change. The booths that we offer integrate seamlessly with all electrostatic application systems of the most well-known and established brands on the market.
The booth can be operated manually or automatically and can be equipped with manipulators equipped with an object recognition system.

Following powder application, the pieces are transported into a curing oven containing a forced air flow. The required temperature ranges from 160°C to 220°C, depending on the pieces. In the curing oven the air is forced from upper part through the ventilators, along the entire length of the oven. Then it goes through the heat exchanger and the holes to the lower part of the oven. It is important that the circuit of hot air produced by the combustion of the burner does not come into contact with the recirculated air, so it is conveyed outside through special discharge pipes. A safety device protects the heat exchanger in case of overheating.

Pieces can be transported around the production facility by our advanced monorails and ‘Power&Free’ conveyors. The modular design of our coating lines creates endless possibilities for the upgrading and extension of an existing installation so as to suit customer’s individual requirements. Because of the simplicity of construction, it also facilitates easy change, extendibility and reconfiguration for process change and future expansion, whilst taking into consideration space availability and ultimately the desired effect of the coating line.