Air exhaust assembly for PUR hot melt adhesive filling, filling mechanism and filling method

The invention belongs to the technical field of hot melt adhesive filling, and particularly relates to an air exhaust assembly used for PUR hot melt adhesive filling. In the process that a filling mechanism of the device pours liquid glue towards a glue box, air in the glue box is exhausted through the air exhaust assembly, after pouring is completed, a piston moves upwards, wall hanging glue is pushed back into the glue box, and then the wall hanging glue is injected into the glue box; in this way, it is guaranteed that no air remains in the glue box, the cold sealing mechanism is used for conducting cold sealing solidification on the liquid glue on the top of the glue box and sealing the glue inlet, and compared with the prior art that an aluminum mold and the bottom of the glue box jointly press downwards to block the glue inlet, the situation that leakage is generated due to the fact that the aluminum mold cracks due to shaking in the transportation process is avoided. 本发明属于热熔胶灌装技术领域，具体涉及一种用于PUR热熔胶灌装的抽气组件