A pneumatic glue gun

Abstract

The invention provides a pneumatic caulking gun. The pneumatic caulking gun comprises a gun barrel, a rear cover, a sealing ring, a trigger, a valve and a valve element, wherein a caulking air cavity is formed in the gun barrel, the rear cover is installed at the rear end of the gun barrel and provided with an air inlet and an air outlet, and the sealing ring is arranged at the installation position between the gun barrel and the rear cover in a tightly pressing mode. The pneumatic caulking gun is characterized by further comprising an airway integration part and a membrane, a first base is arranged at the bottom of the rear cover, a second base is arranged on the inner wall of the rear portion of the rear cover, the first base is lower than the second base, the rear portion of the airway integration part is covered with the membrane, a through hole with the front end closed is formed in the middle of the airway integration part, an opening corresponding to the through hole is formed in the middle of the membrane, the airway integration part and the membrane are fixedly arranged on the second base of the rear cover in a sustaining mode, an air inlet cavity is defined by the membrane and the inner wall of the rear portion of the rear cover, an air inlet way penetrating through the airway integration part and an exhaust airway with the front end closed are also formed in the airway integration part and located beside the through hole, the air inlet way is communicated with the air inlet cavity, the through hole and the caulking air cavity, and the exhaust airway is communicated with the air outlet of the rear cover. The pneumatic caulking gun can achieve quick exhausting, is simple in structure and has a small number of parts.

Description

technical field [0001] The invention relates to a glue gun, in particular to a pneumatic glue gun. Background technique [0002] Chinese patent CN201524633 U discloses a glass glue extrusion gun, which includes a front cover, a gun barrel, a gun handle, a trigger, an air pump, an air valve, and a deflation nut. There is an air release hole at the rear, and the air release nut covers the air release hole and is installed at the rear of the barrel. When working, the air is supplied by the air pump, the trigger is pulled to open the air valve, and the air enters the piston chamber to squeeze out the glass glue in the piston chamber. When it is necessary to stop extruding the glass glue, release the trigger, the air valve is closed, unscrew the air nut, and after the gas is completely released, the glass glue stops extruding. This type of caulking gun will have a relatively long time interval from the release of the trigger to the complete discharge of the gas in the barrel. Be...

AI Technical Summary

Problems solved by technology

Of course, there are also some caulking guns that can stop extruding colloid at the moment the trigger is released, but the existing such caulking guns are relatively complicated in structure, have many parts, and are prone to air leakage during use. , which is not conducive to saving production costs

Images