Spray painting

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Spray painting

  1. 1. Application of ElectrostaticsElectrostatic Paint Spraying
  2. 2. Application of ElectrostaticsElectrostatic Paint Spraying• Paint droplets from an aerosolusually become charged byrubbing against the nozzle of thespray.• Car body is earthed, paintdroplets will be attracted onto themetal body.
  3. 3. Application of ElectrostaticsElectrostatic Paint Spraying• Paint droplets repel each otherand spread out more evenly.•Areas that are covered withcharged paint would createrepulsion to the fresh layer ofsprayed paint drops allowing betterdispersion of the paint coating.
  4. 4. Application of ElectrostaticsElectrostatic Paint Spraying•Adv: • Even coat of paint • Paint reaches inaccessible parts
  5. 5.  During car production, the unpainted car body and the paint are given opposite electric charges. Unlike charges attract, so: › The paint sticks to every corner of the car body › The paint covers the car body evenly.
  6. 6.  This machine allows you to make copies of printed material. Makes use of light, heat and static electricity.
  7. 7.  (1) & (3) drum inside is charged. Light reflects an image of document on drum. Dark areas (writing and images on the original) retains a positive charge. (4 & 5) Charged parts of the drum attracts the negatively-charged toner ink (black powdered particles). (6) Toner ink transferred from drum to positively-charged paper, producing a copy of original.
  8. 8. And laser printers…
  9. 9. Inkjet printers work by spraying charged drops of ink onto apage. The droplets can be directed using two oppositelycharged plates. The voltage on these plates can be easilyswapped or varied. The inkjet cartridge can also moved acrossthe page by the printer .
  10. 10. MUHAMMAD FAHD UN NABI KHAN XI-0 USMAN PUBLIC SCHOOL

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