Rotary atomizing head type coating device
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United States of America Patent
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-
May 15, 2001
Grant Date -
N/A
app pub date -
Jun 13, 2000
filing date -
Oct 13, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A rotary atomizing head type coating machine which is arranged to prevent occurrence of spark discharges, including a rotational shaft (9) which is formed of an insulating material, a rotary atomizing head (11) which is likewise formed of an insulating material and mounted on a fore end portion of the rotational shaft (9). An on-head semi-conductive coat film (14) is formed on outer peripheral surfaces of the rotary atomizing head (11). On the other hand, a first arcuate coat film (16) is formed on a first limiter ring (15) which is provided on a motor body (6), and a second arcuate coat film (18) is formed on a second limiter ring (17) which is provided on the rotary atomizing head (11). Further, a power supply semi-conductive coat film (19) is formed on and around outer peripheral surfaces of the rotational shaft (9) between the arcuate coat films (16) and (18). A high voltage which is applied to the air motor 5 is supplied to paint releasing edges (12E) of the rotary atomizing head (11) through the first arcuate coat film (16), power supply semi-conductive coat film (19), second arcuate coat film (18) and on-head semi-conductive coat film (14).
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