Methods and apparatus for conducting electrostatic spray coating

A method of conducting electrostatic spray coating comprising:

• driving a rotary spray head device for electrostatic spray coating which is provided with a funnel-like body having an inner wall surface for guiding coating material and an open end portion at the side of larger diameter thereof, to turn on an axis of rotation surrounded by said inner wall surface of the funnel-like body, and
• supplying a coating base and a hardening agent to said inner wall surface of the funnel-like body of the rotary spray head device at a substantially common location thereon simultaneously through respective separate paths so that said coating base and hardening agent form their respective layers superimposed on each other and on said inner wall surface of the funnel-like body and so that said coating base and said hardening agent move toward said open end portion of the funnel-like body.

A method of conducting electrostatic spray coating comprising:

• driving a rotary spray head device for electrostatic spray coating which is provided with a funnel-like body having an inner wall surface for guiding coating material and an open end portion at the side of larger diameter thereof, to turn on an axis of rotation surrounded by said inner wall surface of the funnel-like body, and
• supplying a plurality of different kinds of material to said inner wall surface of the funnel-like body of the rotary spray head device at a substantially common location thereon simultaneously through respective separate paths so that said different kinds of material form their respective layers superimposed on each other and on said inner wall surface of the funnel-like body and so that said different kinds of material move toward said open end portion of the funnel-like body.

An apparatus for conducting electrostatic spray coating comprising:

• a rotary spray head provided with a funnel-like body which has an inner wall surface for guiding coating material and an open end portion at the side of larger diameter thereof,
• a driving device for driving said rotary spray head device to turn on an axis of rotation surrounded by said inner wall surface of the funnel-like body, and a plurality of nozzles each having its discharging opening positioned to be close to said inner wall surface of the funnel-like body of the rotary spray head device for supplying plural kinds of coating material respectively to said inner wall surface of the funnel-like body at a substantially common location thereon simultaneously through respective separate paths so that said plural kinds of coating material form their respective layers superimposed on each other and on said inner wall surface of the funnel-like body and so that said plural kinds of coating material move toward said open end portion of the funnel-like body.

An apparatus for conducting electrostatic spray coating comprising:

• a rotary spray head provided with a funnel-like body which has an inner wall surface for guiding coating material and an open end portion at the said of larger diameter thereof,
• a driving device for driving said rotary spray head device to turn on an axis of rotation surrounded by said inner wall surface of the funnel-like body, and
• a plurality of nozzles each having its discharging opening for supplying plural kinds of coating material respectively to said inner wall surface of the funnel-like body at a common location thereon simultaneously through respective separate paths, said discharging openings of the nozzles being stacked in a direction perpendicular to said axis of rotation in the vicinity of said inner wall surface of the funnel-like body for discharging therefrom said plural kinds of coating material respectively so that said plural kinds of coating material form their respective layers superimposed on each other and on said inner wall surface of the funnel-like body and so that said plural kinds of coating material move toward said open end portion of the funnel-like body.

An apparatus for conducting electrostatic spray coating comprising:

• a rotary spray head provided with a funnel-like body which has an inner wall surface for guiding coating material and an open end portion at the side of larger diameter thereof,
• a driving device for driving said rotary spray head device to turn on an axis of rotation surrounded by said inner wall surface of the funnel-like body, and
• a plurality of nozzles each having a discharging opening at one end portion thereof for supplying plural kinds of coating material respectively to said inner wall surface of the funnel-like body at a substantially common location thereon simultaneously through respective separate paths, each said one end portion of the nozzles being bent such that each of said discharging opening faces said inner wall surface of the funnel-like body so that the plural kinds of coating material discharged from said discharging openings of the nozzles impinge directly upon said wall surface of the funnel-like body so as to form their respective layers superimposed on each other and on said inner wall surface of the funnel-like body and so that said plural kinds of coating material move toward said open end portion of the funnel-like body.