The correct humidity level in a cleanroom manufacturing environment is vital to maintain production yields and minimize waste.
The widespread use of low solvent, water-borne base coats and paints means that humidity control is essential in spray booths. Relative humidity (RH) levels as high as 65-75% are often used for water-based paints, delivering consistent spray quality by preventing aerosol evaporation and pigment agglomeration, consistent deposition rates and preventing premature drying.
RH幹燥過程是不可取的,高course, but when metal components leave the oven the local environment in sanding, repair and inspection areas can be hot and dry. This leads to worker discomfort and electrostatic build-up, drawing dust to the component. Using a humidifier as anevaporative cooler打擊這兩個問題同時,冷卻the air for a safer, more productive environment and raising the RH to discharge electrostatic. An inspection deck at 35°C / 15% RH can be cooled to 22°C / 65% RH economically and effectively using this principle.
Economic and environmental imperatives such as waste reduction, overspray control, particulate recovery and solvent reduction, mean that electrostatic paint and powder coating is now very widely used, particularly in large industrial applications in robotic, manual and conveyor booths. The process is dependent on maintaining a differential charge between the powder and earthed item, giving good coat uniformity directly and indirectly, minimal overspray and reduced waste.
Commonly, control over air temperature and relative humidity will be provided by an air handling system,fitted with a humidifier,delivering conditioned air directly to one or more spray booths. This might be supplied by the booth manufacturer or designed separately and supplied by an air handling unit (AHU) manufacturer.
For individual spray booths within a premises, an associated AHU may be incorporated or a positive pressure containment room in which materials and equipment can also be kept is built around the booth, conditioned to provide the appropriate temperature, RH and air filtration.
- Brigs and Straton (Manufacturing), USA
- Rolls Royce, UK
- Fokker AeroStructule，荷蘭
- Alliance (Aerospace), USA
- Harley Davidson (Automotive), USA
- Airbus, France
- Bae Systems, UK
- Embraer (Aerospace), USA
- CDI, USA