Plastic film bag making equipment and bag making method

A sealing mechanism comprises a roller shaft support fixed to the bottom of a machine box, the top of the roller shaft support is rotationally connected with a first roller shaft and a second roller shaft, an inner shaft is fixed in the first roller shaft, sliding grooves are evenly formed in the outer side of the inner shaft, and sliding rods are slidably connected into the sliding grooves; liquid collecting pipe holes are hinged to the ends, away from the sliding rods, of the connecting rods; according to the plastic film bag making equipment and the bag making method, the conical heads capable of being controlled to stretch out and draw back are arranged on the outer side of the first roller shaft, glue is conveyed to the surfaces of the conical heads through the straight pipes, the conical heads penetrate through the plastic film so that the glue can adhere the penetrating part of the plastic film, and when the distance between every two adjacent conical heads is small, the glue can be used for adhering t