ROTARY ATOMIZER AND COATING PATTERN CONTROL METHOD
摘要
A rotary electrostatic atomizer uses shaping air (Fs) and pattern control air (Fp). Shaping airflow (Fs) is supplied from shaping air holes (17) aligned along outer one of concentric circles that are concentric with the rotation axis (L) of the bell cup (13) and located behind the front end of the bell cup (13). Pattern control airflow (Fp) is supplied from pattern control air holes (18) aligned along inner one of the concentric circles. Both the shaping air flow (Fs) and the pattern control airflow (Fp) are expelled in circumferentially twisted directions substantially with an equal twist angle opposite from the rotating direction of the bell cup (13). The shaping airflow (Fs) passes a circular line near to and radially outwardly apart from the outer perimeter of the bell cup (13). The pattern control airflow (Fp) intersects the shaping airflow (Fs) from radially inside at the position near to and radially outwardly apart from the outer perimeter of the bell cup (13). Thereby, the pattern control airflow (Fp) gives the shaping airflow (Fs) a radially outward force to enhance the centrifugal force of the shaping air (Fs) and enlarge the coating pattern regulated by the shaping airflow (Fs).