Rotary atomizing head type coating device

A rotary atomizing head type coating system, including:

• a housing having a coating machine mount portion on the front side and a cartridge mount portion on the rear side thereof;
• a coating machine adapted to be mounted on said coating machine mount portion of said housing, and having an air motor with a rotational shaft and a rotary atomizing head mounted on a front end portion of said air motor;
• a feed tube passage hole provided internally of and axially through said rotational shaft of said air motor, and having a front end opened into said rotary atomizing head and a rear end opened into said cartridge mount portion of said housing;
• and
• a plural number of paint cartridges containing paint of different colors in respective cartridge cylinders, each one of said paint cartridges being adapted to be replaceably and selectively loaded on said cartridge mount portion of said housing and having a feed tube extended axially forward from a front end portion of said cartridge cylinder for placement in said feed tube passage hole;
• characterized in that said coating system comprises:
• on the side of said cartridge, a movable partition wall dividing said cylinder into a paint reservoir chamber in communication with said feed tube and an extruding liquid chamber, an extruding liquid passage for supplying an extruding liquid to said extruding liquid chamber, and a paint valve to turn on and off paint supply from said feed tube to said rotary atomizing head;
• on the side of said housing, an extruding liquid passage in communication with said extruding liquid passage on the side of said cartridge;
• and
• an extruding liquid valve provided within the length of said extruding liquid passage either on the side of said cartridge or on the side of said housing to turn on and off extruding liquid supply to said extruding liquid chamber.