Patent ID: 8794177

Claim:
A coating apparatus comprising: a rotational shaft: a rotary drive device configured to rotate the rotational shaft: a rotary atomizing head attached to the rotational shaft and configured to thin a paint by a centrifugal force resulting from a rotation of the rotary atomizing head and to discharge the paint from an outer peripheral edge portion of the rotary atomizing head to a work; and an air injecting unit that injects annular shaping air towards the outer peripheral edge portion of the rotary atomizing head, wherein the air injecting unit includes a first air injecting port and a second air injecting port, wherein the air injecting unit is configured to inject a first air of relatively high wind speed from the first air injecting port and to inject a second air of relatively low wind speed from the second air injecting port, wherein the air injecting unit further includes a plurality of buffer chambers that is provided upstream from the first air injecting port and the second air injecting port and is partitioned by a partition wall, and wherein the air injecting unit is configured to attract the second air towards the first air and to displace a part of the second air towards a rotational axis of the rotary atomizing head so as to form a substantially circular coating pattern having a center on the rotational axis of the rotary atomizing head, by injecting the first air of relatively high wind speed from the first air injecting port and injecting the second air of relatively low wind speed from the second air injecting port.