Claims
- 1. A method of electrostatically spray-coating a workpiece with electrically-conductive paint subjected to a voltage using a spray gun,
- said spray gun having a rotatable atomizing head attached to a rotator for rotating said atomizing head, a paint supply line for supplying said paint to said atomizing head, and a cleaning line for supplying cleaning liquid and air, where the air is under a pressure, to said atomizing head,
- said rotator having a path for accommodating said paint supply line and said cleaning line therein, said path being formed in a cylindrical shape along a rotative axis of said rotator,
- said cleaning line being disposed coaxially in said path, with an end opening thereof disposed in said atomizing head,
- said paint supply line being disposed coaxially within said cleaning line and having a nozzle tip thereof projecting frontward from said end opening of said cleaning line into the center of said atomizing head, preventing liquid communication between said cleaning line,
- the method comprising the steps of:
- electrostatically spray-coating the workpiece with said paint;
- supplying said cleaning liquid to said atomizing head via said cleaning line to wash said atomizing head after said spray-coating;
- supplying the air to said cleaning line after washing said atomizing head, to discharge said cleaning liquid remaining in said cleaning line through said atomizing head, at a delivery rate within a rate of spraying said paint during said spray-coating; and
- drying said cleaning line before spray-coating a next workpiece, to prevent voltage leakage, with air under pressure higher than an air pressure used for discharging the remaining cleaning liquid.
Priority Claims (2)
Number |
Date |
Country |
Kind |
3-009829[U] |
Feb 1991 |
JPX |
|
3-033049 |
Feb 1991 |
JPX |
|
Parent Case Info
This application is a continuation, of application Ser. No. 07/833,667 filed on Feb. 11, 1992, now abandoned.
US Referenced Citations (5)
Foreign Referenced Citations (4)
Number |
Date |
Country |
8009123 |
Nov 1980 |
FRX |
3440381 |
May 1986 |
DEX |
257994 |
Dec 1990 |
JPX |
2084048 |
Apr 1982 |
GBX |
Non-Patent Literature Citations (2)
Entry |
Patent Abstracts of Japan, vol. 016, No. 466 (C-0989) 28 Sep. 1992 & JP-A-41 66 253 (Nissan Motor Co., Ltd.) 12 Jun. 1992. |
Patent Abstracts of Japan, vol. 004, No. 081 (C-014) 11 Jun. 1980 & JP-A-55 047 161 (Nippon Ranzubaagu KK) 3 Apr. 1980. |
Continuations (1)
|
Number |
Date |
Country |
Parent |
833667 |
Feb 1992 |
|