Fast hot melt adhesive gun

A fast hot melt adhesive gun, comprising an adhesive gun housing, wherein an end part of one end of the adhesive gun housing is provided with an adhesive inlet, a heating cavity configured for heating an adhesive rod is formed in the adhesive gun housing, an inner wall of the adhesive gun housing is fixedly connected with a chute for the adhesive rod to slide, the heating cavity comprises

• a funnel-shaped heating head having an exterior with a surface area located at a front end of the hot melt adhesive gun, a rear end of the funnel-shaped heating head is in communication with a connecting pipe, the exterior surface area of the funnel-shaped heating head is covered completely with a PTC heating layer, an inner diameter of the funnel-shaped heating head is gradually reduced from a first end at the connecting pipe to a second end at the funnel-shaped heating head, a copper sleeve having an adhesive outlet extends from the second end of the heating head, wherein a melted adhesive rod flows out through the adhesive outlet, and a center line of the adhesive rod is aligned with a center line of the funnel-shaped heating head.