Anest Iwata Corporation

Atsushi Morohoshi

Masaru Kaneko

Shozo Kosaka

Nobuyoshi Morita

Takayuki Hata

Nobuhiro Sawata

Takuya Matsumoto

Yasuhiro Ochii

Disclosed is a spray gun including: a body having a gun barrel; a coating material nozzle disposed on a tip end side of the gun barrel; and an air cap disposed on the tip end side of the gun barrel to surround a tip end portion of the coating material nozzle, wherein the tip end portion of the coating material nozzle has on the tip end surface thereof a guide wall spreading, and also has on an outer peripheral surface thereof a plurality of air grooves channeled gradually increasing in depth in a longitudinal direction, and wherein the inner peripheral surface of the air cap has a parallel surface parallel to the outer peripheral surface of the tip end portion of the coating material nozzle and successively a tapered surface spreading in a conical shape.

Spray gun

Disclosed is a spray gun including: a body having a gun barrel; a coating material nozzle disposed on a tip end side of the gun barrel, and an air cap disposed on the tip end side of the gun barrel to surround a tip end portion of the coating material nozzle, wherein the tip end portion of the coating material nozzle has on the tip end surface thereof a guide wall spreading, and also has on the outer peripheral surface thereof a plurality of air grooves channeled in a longitudinal direction, and wherein each of the air grooves has a bottom portion gradually increasing in depth in the longitudinal direction, the bottom portion being located within a range of the guide wall on the tip end surface of the coating material nozzle.

A spray gun including: a body having a gun barrel; a coating material nozzle disposed on a tip end side of the gun barrel, and an air cap disposed on the tip end side of the gun barrel to surround a tip end portion of the coating material nozzle, wherein the tip end portion of the coating material nozzle has on the tip end surface thereof a guide wall spreading, and also has on the outer peripheral surface thereof a plurality of V-shaped grooves channeled in a longitudinal direction, and wherein the V-shaped groove has, in a triangle shaped cross section defined by contours crossing the guide wall, a height in the range of 0.5 mm to 2.5 mm and an opening angle of a bottom vertex in the range of 20 degrees to 100 degrees.

A spray gun including: a body having a gun barrel, a coating material nozzle disposed on a tip end side of the gun barrel; and an air cap disposed on the tip end side of the gun barrel to surround a tip end portion of the coating material nozzle, wherein the tip end portion of the coating material nozzle has on the tip end surface thereof a guide wall spreading and also has on the outer peripheral surface thereof a plurality of air grooves in a V shape channeled in a longitudinal direction, and wherein each of the air grooves has a bottom portion gradually increasing in depth in the longitudinal direction, the bottom portion having a curvature radius of 0.15 mm or less.

A spray gun for electrostatic painting in which an external electrode sustaining a high voltage can be fixed/removed while sustaining insulation from a spray unit on the ground potential side by limiting current supply to paint appropriately when electrostatic painting is performed using conductive paint, e.g. water based paint, and safety and handling performance are enhanced while ensuring the painting efficiency as the spray gun for electrostatic painting. On the outside of the spray gun () having the spray unit () at the forward end thereof, the external electrode () having an electrode projecting from the forward end part thereof is provided removably at the part () of the gun body being connected with the electrode while being separated from the paint passage such that it can be replaced readily. The part being connected with a high voltage output end part through a high resistor for limiting current can be shortened while sustaining safety by providing a turn-up part so that a sufficient creeping discharge preventing distance is ensured up to the exposed part on the outer surface. Furthermore, the electrode body itself is simplified so that it can be replaced with one touch, and it is composed of a flexible resilient material in order to prevent damage.

Growing community of inventors

Yokohama, Japan

Atsushi Morohoshi