公开(公告)号：EP0756898A1

公开(公告)日：1997-02-05

申请号：EP96900698.0

申请日：1996-01-17

Applicant: ABB Industry K.K.

Inventor： LEE, Hoyang ,  TAKAYAMA, Shinichi

IPC: B05B5/025

CPC classification number: B05B7/0815 ,  B05B5/03 ,  B05B5/0533 ,  B05B5/1608

Abstract: A spray gun type electrostatic paint coating machine which is capable of improving quality of coated surfaces, the coating machine including an air nozzle (8) and a paint nozzle (21) respectively provided at the fore end of a spray gun body (6). The spray gun body (6) and the air nozzle (8) are made of an electrically insulating material, while the paint nozzle (21) is made of a metallic material including a paint spouting orifice (21C) which is projected on the front side through the air nozzle (8). The paint spouting orifice (21C) is connected to ground through a paint supply passage (10) to serve as a grounding electrode. Sprayed paint particles are at the earth potential, so that they are less susceptible to influences of dielectric polarization and negatively charged quickly by the high negative voltage of the external electrode. As a consequence, sprayed paint particles are prevented from depositing on the air nozzle (8) or other negatively charged surfaces and falling down in the form of discrete dot-like driblets to contaminate a coated surface.

Abstract translation: 一种喷枪式静电涂料机，其能够提高涂布表面的质量，涂布机包括分别设置在喷枪体（6）前端的空气喷嘴（8）和涂料喷嘴（21）。 喷枪体（6）和空气喷嘴（8）由电绝缘材料制成，而喷嘴（21）由包括喷射孔（21C）的金属材料制成，该喷涂孔（21C）突出在前侧 通过空气喷嘴（8）。 涂料喷口（21C）通过涂料供应通道（10）连接到地面上，用作接地电极。 喷涂的油漆颗粒处于地电位，使得它们不易受到介电极化的影响，并被外部电极的高负电压快速带负电。 因此，防止喷涂的颗粒沉积在空气喷嘴（8）或其它带负电的表面上，并以分散的点状流体的形式落下以污染涂覆的表面。