AIR FLOW CONTROL
AFC powder coating
WAGNER Air Flow Control (AFC) means precise powder control and thus optimal coating results. In addition, WAGNER units have a closed-loop control, which continuously measures and corrects the air pressure if necessary. This ensures consistent values.
- Constant air volume
- No difference between set and actual values
- Complete reproducibility of settings and results
- Remote control by application control
- Individual coating formulations with all application parameters
Corona powder coating
The producing of high voltage in the corona process is done with the aid of a high voltage cascade, which is integrated in the gun body. The voltage level is regulated in the control module and is matched to the geometry of the work piece, or to the powder coating system in use. The charged particles „move“ along the field lines to the grounded work piece.
The advantages of the corona process are the low wear of the gun, the low air consumption as well as the universal application, as many powder coatings (e.g. effect powder coatings) are not suitable for the tribo process.
Tribo powder coating
The tribo process is based on frictional charging. In this case, the fluidized powder/air mixture in a PTFE powder tube is charged by means of friction against the inside tube wall. Due to its excellent electrical insulation properties (negative), PTFE is well-suited to charging the particles and its good anti-frictional properties prevent build-up on the walls.
The advantages of the tribo process are the good penetration depth and the better film thickness distribution. In comparison to the corona process, the powder can easily penetrate into depressions (e.g. mailboxes and rims). The coated surface is smoother with no “orange peel” effect.