Air-intake control device of paint spray gun

Abstract

An air-intake control device of paint spray gun belongs to the technology field of paint spray gun, which includes the valve chamber setup in the middle of air-draft manifold assembly of the gun, the valve core setup at the valve spindle and offsetting spring. In the valve chamber there is a running-liner with the clack seat at one side, the valve spindle is setup in the through hole of the running-liner, the radial burn-out pipe connected with spraying lacquer out spout of the paint spray gun is setup at the through hole in the middle of the running-liner, one side of the valve spindle sticks out of the gun body after sealed by the sealed ring while at the other side of the valve spindle there is the valve core with offsetting spring outside combining with clack seat to open and close the induction trunk, at the other side of the offsetting spring there is a sealing cushion. This invention accounts for the problem of the valve chamber wall easy to leaking, the hermeticity of the products is good, the sealing member is not liable to attaint for the valve core and sealing member employ the corrosion resistant materials, and the life time of the product is long.

Description

technical field [0001] The invention belongs to the technical field of paint spray guns, in particular to an air intake control device for a paint spray gun. Background technique [0002] Common paint spraying gun comprises gun body 1, the one-piece handle that hangs down from one end of gun body 1 and the paint nozzle that is arranged on the other end of gun body 1, paint material tank 2 is arranged on the upper end of gun body 1, at the end of handle is The air inlet can connect the compressed air to the air inlet. The air inlet extends to the gun body and leads to the paint nozzle to form an air inlet passage 4. The middle part of the air inlet passage 4 is provided with an air inlet valve chamber 9, and the air inlet The spool 5 of the device is installed on one side of the valve stem 3. The spool 5 cooperates with the valve seat 6 set on the intake valve chamber 9 to control the switch of the intake passage 4, and the return spring 7 ensures that the spool 5 is normally...

AI Technical Summary

Problems solved by technology

[0002] Common paint spraying gun comprises gun body 1, the one-piece handle that hangs down from one end of gun body 1 and the paint nozzle that is arranged on the other end of gun body 1, paint material tank 2 is arranged on the upper end of gun body 1, at the end of handle is The air inlet can connect the compressed air to the air inlet. The air inlet extends to the gun body and leads to the paint nozzle to form an air inlet passage 4. The middle part of the air inlet passage 4 is provided with an air inlet valve chamber 9, and the air inlet The spool 5 of the device is installed on one side of the valve stem 3. The spool 5 cooperates with the valve seat 6 set on the intake valve chamber 9 to control the switch of the intake passage 4, and the return spring 7 ensures that the spool 5 is normally closed. state, when spraying paint, move the handle to the right, make the handle press the valve stem 3 in, keep the valve core away from the valve seat, connect the air flow channel, the compressed gas will be ejected from the nozzle on the paint nozzle, and at the same time, drive the The paint is sprayed out, and its shortcomings are: one, the one-piece gun body 1 is generally cast iron, due to casting, the gun body 1 cannot avoid the formation of many irregular small holes due to casting bubbles, due to the air intake valve cavity The wall thickness of the chamber 9 is relatively thin, and some small holes will directly lead to the outside of the gun body 1 from the inlet valve chamber 9. When the paint spray gun is working, part of the gas will leak from the small holes, resulting in poor sealing. , which seriously affects the normal use of the gun body 1; the second is that after the painting is finished, people generally soak the spray gun in rosin water to clean the gun body, but the valve core and most of the seals are rubber gaskets, so loose Perfume will accelerate the corrosion and damage of the sealing gasket; the third is that the valve core made of rubber sealing ring has poor impact resistance, and the frequent switching of the gun body will cause premature fatigue damage to the valve core due to impact, which will affect the normal work of the paint spray gun

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