The plant for Rißler Fensterbau is running
June 2019, Baden-Württemberg. Finiture completes the last works on the new finishing plant for windows and frames of Rißler Fensterbau.
The operating cycle starts in a loading / unloading area where the pieces are hung on a Power & Free conveyor, which releases the trolleys from the tow chain when they touch the trolley or arrive at the programmed stop-and-go positions.
After that the pieces go through a vertical Superjet flow coating, in which the product is dispensed through three sets of nozzles. The excess product is collected in a tank and recirculated by a pump. The circuit consists of 4 main valves for the following tasks: supply, suction, loading and unloading of the product. Two additional valves, suitably positioned, allow the complete discharge of the circuits. In the central part of the machine there is a pump with filter to optimize the collection of liquids. The control panel is ergonomically designed and equipped with a highly intuitive interface.
The wastewater from the impregnation process is treated by the AC200 clarifier, where the flocculation process is operated by an electromechanical stirrer. The clarified and filtered wastewater is drained into a container at the bottom of the machine, from which it can be removed and reused.
After the impregnation, the pieces go through an optical scanner that creates a digital image of the pieces. The data collected by the scanner is processed by the computer (CPR) to set up the corresponding painting program for the RAS spraying robot. The process is completely automatic. Once inside the cabin, the piece can be painted on both sides thanks to the conveyor’s rotation group. In the dry paint booth with floor suction, a grid covers a filtration system for the overspray. The remaining paint vapors are retained by a glass fiber filter installed in the lower part of the cardboard filter. The spray booth is equipped with a high pressure humidifier. Due to the high operating pressure of the plant, the water is sprayed so as to dampen the room without wetting the pieces. The system consists of a high-pressure pump assembly with a wall-mounting frame, a humidification control screen, a water filtration system, nozzles and connection pipes. Thanks to a supply air system, the discharged air is integrated with air extracted from the outside.
After painting, the pieces run through a drying tunnel with LDP system and axial fans. The LDP system guarantees constant conditions throughout the year, regardless of the conditions of the working environment. The air movement works in a closed circuit, reducing energy and installation costs. A heat regulator controls the humidity and air temperature during the drying process.
Finally, the finished profiles go back to the unloading area.