Patent ID: 6230994
Filing Date: 2001-05-15
Classification: B05B

Abstract:
A rotary atomizing head type coating machine, comprising:a cover of a tubular shape formed of an insulating synthetic resin material;an air motor mounted within said cover and formed of a conducting metallic material;a rotational shaft formed of an insulating material passed axially through and adapted to be rotated by said air motor;a rotary atomizing head formed of an insulating synthetic resin material in a bell-like shape having a mounting portion at a rear end and paint releasing edges at a fore end thereof, and mounted on said rotational shaft at an axially spaced position from a fore end of said air motor;an on-head semi-conductive coat film provided on outer peripheral surfaces of said rotary atomizing head for charging paint particles to be sprayed from said rotary atomizing head;a power supply semi-conductive coat film provided either on inner peripheral surfaces of said cover or on outer peripheral surfaces of said rotational shaft between said fore end of said air motor and a rear end of said rotary atomizing head for supplying said rotary atomizing head with a high voltage applied to said air motor;a first arcuately curved portion formed in a ring-like shape by the use of an insulating synthetic resin material applied with a semi-conductive coat film on outer peripheral surfaces thereof or by the use of a conducting metallic material, and provided between said fore end of said air motor and said power supply semi-conductive coat film; anda second arcuately curved portion formed in a ring-like shape by the use of an insulating synthetic resin material applied with a semi-conductive coat film on outer peripheral surfaces thereof or by the use of a conducting metallic material, and provided between said power supply semi-conductive coat film and a rear end of said on-head semi-conductive coat film.