JPS6394550U - - Google Patents

Description

[Brief explanation of the drawing]

The accompanying drawing is a side view showing a main part of an embodiment of the rotary bell type rotary atomizing electrostatic coating machine of the present invention, with the bell type rotary atomizing head and closing member cut away. In the figure, 1 is a bell hub, 2 is a disc-like projection of the bell hub, 3 is a bell rim, 4 is a rear chamber of the bell rim, 5 is a front chamber of the bell rim, 6 is a paint passage, 7 is a bell-shaped rotating atomizing head, and 8 is a bell-shaped rotary atomizing head. The rear end portion of the bell hub, 9 is the air motor, 10 is the rotating shaft of the air motor, 11 is the housing of the air motor, 12 is the paint supply nozzle, 13 is the cylindrical inner circumferential wall of the rear chamber, and 14 is the annular shape of the annular projection. Rear wall, 15 is an annular jetty, 16 is a circular opening at the rear end of the bell rim, 17 is a closing member, 18, 2
1 is a gap, 19 is a cylindrical outer peripheral wall of the front protrusion, 2
0 is an annular front end wall of the front protrusion, 22 is the front protrusion of the closing member, 23 is a cleaning liquid discharge port, 24 is an air jet port, 25 is a main body portion of the closing member, 26 is a cleaning liquid passage, 27 is an air passage, Reference numeral 28 indicates a paint-cleaning liquid passage.

Claims (1)

[Scope of utility model registration request] A hollow truncated conical bell rim is coaxially joined and fixed to the outer peripheral edge of the disc-shaped projection of the bell hub, and a rear chamber and a front chamber of the bell rim internal cavity partitioned by the disc-shaped projection are formed at the joint part, respectively. A bell-shaped rotating atomizing head with a plurality of communicating paint passages provided at approximately equal intervals is attached and fixed to the front end of the rotating shaft of an air motor for driving the rotation of the atomizing head, and a high voltage is applied to the rotating atomizing head. The tip of the paint supply nozzle is inserted into the rear chamber of the bell rim through a circular opening at the rear end of the bell rim. The liquid paint supplied to the rear chamber is transferred to the front chamber through each paint passage, and the liquid paint is charged by the high voltage applied to the rotary atomizer head and the high speed rotation of the rotary atomizer head, and the liquid paint is charged at the front end of the bell rim. It is a rotating bell-type rotary atomizing coating device that emits atomized water from the periphery, and the rear chamber of the bell rim of the rotating atomizing head has a cylindrical inner circumferential wall extending forward from its rear end, and a cylindrical inner circumferential wall extending from the front end of the cylindrical inner circumferential wall. an annular projection having an annular rear wall protruding radially inward and having an angle substantially perpendicular, perpendicular, or close to the central axis of the bell rim, and in the installed state, the bell rim rear chamber A hollow body having a cylindrical outer circumferential wall and an annular front wall that are parallel to the cylindrical inner circumferential wall and the annular rear wall of the annular jetty part with a small gap therebetween, and that fits loosely into the outer periphery of the rear end portion of the bell hub. The main body portion of the closure member having a cylindrical front projection is fitted into the front end portion of the air motor housing with the hollow cylindrical front projection being fitted into the rear chamber of the bell rim through the circular opening at the rear end of the bell rim. , the annular front end wall of the hollow cylindrical front protrusion of the closing member has a bell rim center axis slightly inward in the radial direction from the inner peripheral edge of the annular rear wall of the annular projection provided in the bell rim rear chamber. A large number of cleaning liquid discharge ports are opened in a direction approximately parallel to the center axis of the bell rim at approximately equal intervals along a circle centered on . Attached to the front protrusion, the nozzle portion of the paint supply nozzle that is exposed forward from the front end surface of the front protrusion is approximately one-fourth of the outer peripheral wall of the hollow cylindrical rear end of the bell hub.
It is curved in an arc shape along the circumference in the same direction as the rotating direction of the rotary atomizing head, and protrudes diagonally forward, with its tip opening toward the vicinity of the connection between the bell rim and the disc-shaped protrusion of the bell hub. , in the portion of the cylindrical outer circumferential wall of the hollow cylindrical front protrusion that faces the cylindrical inner circumferential wall of the bell rim rear chamber, a large number of air jets are provided diagonally forward outward at substantially equal intervals along the circumference of the outer circumferential wall. The main body portion of the closing member includes a cleaning fluid passageway for supplying cleaning liquid to each of the cleaning liquid discharge ports, an air passageway for supplying pressurized air to each of the air jetting ports, and a paint supplying port. A rotary bell-type rotary atomizing electrostatic coating machine characterized by having paint and cleaning liquid passages for selectively switching and supplying liquid paint and cleaning liquid to the nozzle.