SPRAY COATING METHOD FOR EXTERIOR PANEL OF AUTOMOBILE BY AIRLESS METHOD AND SPRAY GUN FOR SPRAY COATING

摘要

PURPOSE: To perform coating free from a rough surface while utilizing the characteristics of airless coating by adding ultrasonic vibration to a fluid nozzle in the case of spouting a coating material in an atomization state and performing spray coating on the exterior panel of an automobile by an airless method. ;CONSTITUTION: A coating material is spouted in an atomization state through a fluid nozzle 12 by adding pressure to the material and spray coating is performed on the exterior panel of an automobile by an airless method. In this case, a spray gun for spray coating is constituted, so that an ultrasonic hurn 4 is provided in the fluid nozzle 12 and an ultrasonic wave oscillator 23 is connected to the ultrasonic horn 4 through wiring 22 and ultrasonic vibration is added to the fluid nozzle 12. Thereby, the atomization state of the coating material is made good and also flow rate of the material is made uniform in the central part and the wall part of the flow path in the coating material flow path 11. Thereby, the conventional nonconformity that a thick part is formed in the outside when flow rate of coating material is nonuniform is solved. A high-quality coating free from a rough surface is performed while utilizing the characteristics of airless coating.;COPYRIGHT: (C)1997,JPO