To a pneumatic gun

The present invention relates to a pneumatic spray gun, comprising a gun body, gun tail gun provided in the core body, the core outer gun sleeve inner gun nozzle provided at the front end of the inner sleeve the gun, on the gun nozzle opened mate with the front end of the core the spout, the outer sleeve within the gun with a gun in the neck, with the front end of the gun in the neck split neck, allowing the liquid fluid through the gap formed there between the core and the sleeve within the gun the gun, characterized in that: the gun with the gun in the sleeve there are gaps allow airflow through the blowing air flow is formed between the neck. The present invention, in the liquid pressure transmission passage, the pressure in the outer line, increasing the airflow transport layer, the injection nozzle opening portion of the liquid, active high velocity gas stream by the liquid ejected. The lance completely overcome the shortcomings of the prior gun, to meet viscosity requirements of the injection 5000CPS viscous liquid, the high frequency response in claim 40 msec / second while a tightly controlled injection amount, and the injection life of more than 30 million times.