Geinsa has recently installed a surface treatment line at AAF’s factory in Vitoria, a company that supplies specialized solutions for filtration and industrial air treatment. The facility consists of a treatment tunnel with its corresponding osmotic water production equipment and oil separator, a drying oven, a polymerization oven and a conveyor circuit. The line is controlled from a general electrical cabinet with PLC and touch screen. The equipment is completed with a quick color change powder coating booth.
In the surface treatment and drying facility installed at AAF, the pieces are moved by means of a continuous conveyor where the pieces advance continuously. The pieces are introduced into the tunnel, the operation of which is based on the reverse cascade technique, in which the liquid that the pieces carry in each bath is directed to the preceding stage, with the aim of minimizing the consumption of chemical product and spillage. To the exterior.
The tunnel incorporates a closing system on the roof, using brushes, so that vapors don’t affect the transport chain. The extraction fans draw in these vapors generated in the cleaning process, through the openings with adjustable gates, located on the sides and in the upper part of the tunnel entrance gauge. Drop separating elements are incorporated to recover the condensed liquid and return it to the tank.
The last wash is carried out with pure osmotic water to guarantee in this way, the highest quality of finish of the pieces. The last stage is a passivation without rinsing, which guarantees the chemical stability of the surface of the piece.
Once the treatment process is finished, the piece enters the humidity drying oven and will be ready for the application of powder paint. After applying paint, the pieces are placed in the polymerization oven. At the exit of the ovens, air curtains have been installed to prevent heat escaping to the outside.
The conveyor has a static parking-cooling zone, prior to unloading, which facilitates comfortable static handling with the parts-carrier frame stopped. Once the load is finished, the rack is incorporated into the continuous circuit.