(1) The gas source work pressure is too low, should adjust the pressure valve suitably, enhances the work pressure.

(2) The glue gun is not clean, the glue cures the blockage passageway, at this time, must clear the dredging channel.

(3) The viscosity of the adhesive is not appropriate, if the stick through the big, resistance increased, the glue is not continuous or can not be made out of glue, therefore, to select the adhesive to meet the requirements.