| 摘要 |
PURPOSE: A water soluble spray gun is provided to spray air through an air spraying hole of an air nozzle cap before a soluble material is sprayed so that remaining liquid on the spraying nozzle does not fall into a material to be sprayed. CONSTITUTION: A water soluble spray gun (100) comprises a gun main body (110), a grip part (120), a spraying nozzle (113) with a material spraying hole (112) and a valve seat which is controlled by a needle valve (180), an air nozzle cap (130) with several air spraying holes (131) which are formed in a diagonal line way in odor to spray a material in a rotating way, a material supplying path (S3) which sprays the material from a material supplying and connecting hole (111) on the gun main body, the first air supplying path (S1) receiving the air to spray the air through the air spraying hole when the material is sprayed through the material spraying hole and the second air supplying path (S2) receiving the air in order to give air to a pressure chamber which is for operating the piston of the needle valve. |
